GMR (Giant magneto-Resistance) Essay Example | Topics and Well Written Essays - 2250 words

GMR (Giant magneto-Resistance) - Essay Example The path thus travelled is called the mean free path length. The electrical resistance is directly proportional to this mean free length. The inference is, more the free length less is the bombardment of the electron with other atomic particles hence less is the resistance of the material. However in materials that are very thin the chances of electrons reaching its outer boundary very quickly and getting dispersed are more than getting scattered by other electrons within the material itself. The low thickness of the material thus creates it difficult for the electrons to travel thereby increasing the resistance. The diagram indicated above show the manner in which resistivity increases with decrease of mean free path. In order to achieve this GMR effect another key in the construction of this film is that these are manufactured in thin layers of magnetic and non-magnetic materials.( Application Notes for GMR Sensors, 2010) The GMR film is such that the magnetization of the two layers separated by the non magnetic layer creates an anti-ferromagnetic coupling. It means when there is no externally applied magnetic field the magnetization of these two layers is in the opposite direction. Under the influence of an external magnetic field the electrons in each magnetic layer aligns according to its spin. Since the spin direction is opposite in these two layers either electron from each layer scatters off the boundary of the other magnetic layer. This results in a huge decrease of the mean free length of the electron causing an increase in electrical resistance. If however the magnetic field exceeds a certain limit this boundary barrier is overcome as all electrons in both the magnetic layers acquire the same spin. Thus the movement of electrons are eased leading to decrease in resistance.( Application Notes for GMR Sensors, 2010) The

Legal essay(family law) Essay Example for Free

Legal essay(family law) Essay Evaluate the effectiveness of the law in achieving justice for parties involved in relationship breakdown. Legislation and cases strive to achieve justice for all parties involved in a relationship breakdown. However, justice can be difficult to achieve as the law does not always uphold the rights of individuals. The law does reflect social and community values and strives to be accessible. Divorce is an example of the law being easily enforced, while with disputes involving children effectiveness isn’t always achieved. Amendments to legislation now make the law more effective when dealing with relationship breakdown’s between same sex couples and de facto relationships. Divorce is becoming more common in society, this means that legislation has been made more effective in achieving individuals rights. The Family Law Act 1975 (cth) established ‘no fault’ divorce, as long as the couple is separate for 12months, that overturned the Matrimonial Causes Act 1959 (Cth). Divorce is an effective method in achieving justice for parties involved in a relationship breakdown. An example of this is in the case Pavey v Pavey 1976, this case established ‘separate under one roof,’ this allowed couples to get a divorce even if they were living together due to financial strain. Pavey v Pavey is an example of how the law achieves justice for individuals and the accessibility of the law. Most issues related to relationship breakdown involves children, legislation has been improved in recent years to overcome this, but there are still many cases where justice isn’t achieved for all parties. The Child Support (assessment) Act 1984 (cth) aims to deduct money to support the child if the parent isn’t living with them. The Federal Government in 1990 ratified the UN’s Convention on the Rights of the Child. This ruled that all cases were to be solved in the ‘best interests of the child.’ The Family Law Reform Act 1995 (Cth) recognises ‘best interests of the child’ and also changes ‘custody’ to ‘residency’ and ‘contact.’ This legislation has effectively achieved justice for families however, the ‘best interests of the child’ and the presumption of shared parenting outlined in the Family Law Amendment Act (Shared Responsibilities) Act 2006 (NSW) was overturned by the High Court. The High Court overturned ‘best interests of the child’ in the case MRR V GR 2010, as shared parenting wasn’t reasonably practible and the rights of the individual was not being upheld. MRR v GR is an example of how legislation is not effective, but due to the responsiveness of the legal system, justice was achieved. The Family Law Amendment (Shared Responsibilities) Act 2006 (NSW) also created Family Relationship Centres that allowed families to resolve disputes and there is compulsory 3 hours mediation in the breakdown of a marriage involving children. The law has been effective in achieving justice for parties involved in a relationship breakdown as it upholds community values, is accessible and responsive and aims to protect the rights of individuals. The law is also responsive in protecting the rights of individuals through the media and lobby groups. Lobby Groups such as Dads in Distress, aimed to establish shared parenting as they were unable to see their children. This lead to reforms in the Family Law Act with a presumption of shared parenting. However the media has given reports of children being at risk because of shared parenting. This is shown in the SMH report ‘For the Sake of the Children.’ The law has to reflect community’s conflicting vales and therefore is not always effective in protecting the rights of the individual. Unmarried couples also have to be protected in the event of a relationship breakdown and justice must be achieved. The Property (Relationships) Act 1984 (NSW) defines de facto relationships and included same sex relationships in the definition. This act protects individuals in the situation of a relationship breakdown by identifying which parties get what. The SMH released an article, ‘Here’s an Idea’ that recognises de facto relationships as a valid choice and that they should be protected by the law. Through recent legislation reforms individual’s rights are achieved, as well as the law being accessible. However, legislation is not always responsive, as de facto relationships were only defined in 1984, and they did not have the same rights as married couples until then. The law is effective in achieving justice for parties involved in a relationship breakdown. Divorce is easily accessible and responsive. Relationship breakdown including children is mainly effective in protecting the rights of individuals and upholding societal values. Through recent legislation developments the relationship breakdown of de facto relationships is now treated the same as the dissolution of marriage. The law is mostly effective in achieving justice and protecting the rights of individuals involved in a relationship breakdown. View as multi-pages

Introduction To Bulk Carriers And Cargo Operations Engineering Essay

Introduction To Bulk Carriers And Cargo Operations Engineering Essay Introduction to Bulk Carriers Bulk Carriers are designed primarily for the transportation of solid bulk cargoes. Leading bulk cargoes are coal, iron ore, phosphate, nitrate and grains such as wheat. The carriage of cargo in bulk reduces packaging costs and loading and unloading operations can be speeded up.  In many cases bulk cargoes are found in countries away from where they are required. Bulk carriers are built to various sizes and classified as Handymax/Panamax/Cape-sized bulkers etc. They also vary in types like geared bulkers, self-unloaders, combination carriers etc. Bulk carriers today form a high percentage of world trade. Bulk cargoes carried by them are subject to hazards because of which there are various codes in place for the safety of operating Bulk Carriers. They comprise of the BC Code, International Code for the Safe Carriage of Grain in Bulk (International Grain Code).   Like the original grain rules, the Code is to prevent the particular qualities of grain threatening the stability of ships when it is carried in bulk.  Ã‚   The revised BC Code deals with types of cargoes which may liquefy, materials which possess chemical hazards, and materials which fall into neither of these categories but may nevertheless pose other dangers.   The Code highlights dangers associated with certain types of cargoes giving information on their properties and how to handle them. Various test procedures are stated as well to determine properties of the cargo. The Code also lays importance on how cargoes should be properly distributed so as not to overstress the structure and maintain an adequate standard of stability. All bulk cargoes when loaded have an angle or repose which determines if the cargo is prone to shift. Unlike high dense cargoes such as iron ore cargoes like grain have a low angle of repose whereby the code states precautions to take so that the cargo movement does not affect the vessels stability. For cargoes with low angle of repose, the Code states that such cargoes should be trimmed reasonably and the holds should be filled fully as far as possible without resulting in excessive weight on the supporting structure. The  trimming also helps to cut oxidation by reducing the surface area exposed to the atmosphere thus preventing spontaneous combustion. The code states dangers related with different types of cargoes, like some cargoes are liable to oxidation where as others may emit toxic fumes without oxidation or when wet.   The code gives details of precautions that should be taken for these types of cargoes. The Code also gives details of the various sampling procedures and tests which should be used before transporting concentrates and similar materials and also recommended test procedures to be used by laboratories. A list of cargoes, which may liquefy is contained in appendix A to the Code, while appendix B gives an extensive list of materials possessing chemical hazards.   Appendix C deals with bulk cargoes which are neither liable to liquefy nor possess chemical hazards.   More detailed information concerning test procedures, associated apparatus and standards, which are referred to in the Code are contained in appendix D.   Emergency Schedules for those materials listed in appendix B are contained in appendix E.   Recommendations for entering cargo spaces, tanks, pump rooms, fuel tanks and similar enclosed compartments are shown in appendix F.   Procedures for gas monitoring of coal cargoes are contained in appendix G. Works Cited Isbester, J (1993), Bulk Carrier Practice IMO, (2004), BC Code Ship/Shore Safety checklist for loading or unloading dry bulk cargo carriers Dateà ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦. Portà ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦.. Terminal/Quayà ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦.. Available depth of water in berthà ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦..Minimum air draughtà ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦. Ships nameà ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦. Arrival draught (read/calculated)à ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦.à ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Air draughtà ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦..à ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦.. Calculated departure draughtà ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦..Air draughtà ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦..à ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦.. The master and terminal manager, or their representatives, should complete the checklist jointly. Advice on points to be considered is given in the accompanying guidelines. The safety of operations requires that all questions should be answered affirmatively and the boxes ticked. If this is not possible, the reason should be given, and agreement reached upon precautions should be taken between ship and terminal. If a question is considered to be not applicable write N/A, explaining why if appropriate. SHIP TERMINAL Is the depth of the water at the berth, And the air draught, adequate for the Cargo operations to be completed? Are mooring operations adequate for all local effects of tide, current, Weather, traffic and craft alongside? In emergency, is the ship able to leave the berth at any time? Is there safe access between the Ship and the wharf? Tended by ship/terminalà ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦ (cross out as appropriate) Is the agreed ship or terminal communications system operative? Communication methodà ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦ Languageà ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦ Radio channels/phone numbersà ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦. SHIP TERMINAL Are the liaison contact persons during operations positively identified? Ship contact personsà ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦ Shore contact person(s)à ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦.. Locationà ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦.. Are adequate crew on board, and adequate staff in the terminal, for emergency? Have any bunkering operations been advised and agreed? Have any intended repairs to wharf or ship whilst alongside been advised and agreed? Has a procedure for reporting and recording damage from cargo operations been agreed? Has the ship been provided with copies of port and terminal regulations, including safety and pollution requirements and details of emergency services? Has the shipper provided the master with the properties of the cargo in accordance with the requirements of chapter VI of SOLAS? 13. Is the atmosphere safe in holds and enclosed spaces to which access may be required, have fumigated cargoes been identified, and has the need for monitoring of atmosphere been agreed by ship and terminal? Have the cargo handling capacity and any limits of travel for each Loader/unloader been passed to the ship/terminal? Loaderà ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦. Loaderà ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦. Loaderà ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦. Has a cargo loading or unloading plan been calculated for all stages of loading /deballasting or unloading/ballasting? Copy lodged withà ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦ SHIP TERMINAL Have the holds to be worked been clearly identified in the loading or unloading plan, showing the sequence of work, and the grade and tonnage of cargo to be transferred each time the hold is worked? Has the need for trimming of cargo in the holds been discussed, and have the methods and extent been agreed? Do both ship and terminal understand and accept that if the ballast programme becomes out of step with the cargo operation, it will be necessary to suspend cargo operation until the ballast operation has caught up? Have the intended procedure for removing cargo residues lodged in the holds while unloading, been explained to the ship and accepted? 20. Have the procedures to adjust the final trim of the loading ship been decided and agreed? Tonnage held by the terminal conveyer systemà ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦ Has the terminal been advised of the time required for the ship to prepare for sea, on completion of cargo work? THE ABOVE HAS BEEN AGREED: Timeà ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦ Dateà ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦ For shipà ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦. For terminalà ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦.. Rankà ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦.. Position/Titleà ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦. Works Cited IMO, (1998), BLU Code, pp.22-25 GYPSUM A natural hydrated calcium sulphate. Insoluble in water. It is loaded as a fine powder that aggregates into lumps. Average moisture content is 1% to 2%. Characteristics Angle of repose Bulk density(kg/m3) St. Factor (m3) N.A. 1282 to 1493 0.67 to 0.78 Size Class Group Up to 100mm N.A. C Hazard: No special hazard. This cargo is non-combustible or has a low fire-risk. Hold cleanliness: No special requirement. Weather precautions: This cargo is to be kept as dry as possible. It shall not be handled during precipitation. All non working holds in which the cargo is loaded or to be loaded to be kept closed. Loading: Trim in accordance with sections 4 5 of the IMSBC CODE. Precautions: No special requirements. Ventilation: No special requirements. Carriage: No special requirements. Discharge: No special requirements. Clean up: Prior to washing of this cargo, decks and cargo spaces should be shovelled and swept clean because washing of the cargo is difficult. Loaded voyage Hatch covers should be secured battened down for sea and water tight. Booby hatches holds ventilation flaps to be secured and should be water tight. Works Cited (2009), IMSBC Code, pp. 176 Information Provided by Shipper Prior to loading of any cargo the shipper provides the master with information necessary for the safe planning and supervision of loading of the cargo. A declaration is made by the shipper related to the cargo in compliance with the recommendation of the BC Code. Along with the MSDS, information provided consists of: Shippers name Reference numbers Consignee Description of cargo (type of material/particle size etc.) Stowage factor Specification of cargo (IMO class, Ems No. Etc.) Angle of repose Chemical properties Relevant special properties of cargo Additional certificates, if required such as TML and moisture content, exemption certificate etc. Works Cited IMO, (1998) BLU Code, pp. 32 MSDS FOR GYPSUM 1. Product Identification Synonyms: Alabaster, Gypsum stone, Land plaster, Calcium Sulfate Dihydrate, Native calcium sulphate. CAS No.: 13397-24-5 2. Composition/Information on Ingredients Ingredient CAS No Percent Hazardous Gypsum 13397-24-5 90 99% No 3. Hazards Identification Toxic Harmful by inhalation (contains crystalline silica). Mineral Formulae: CaSo42H2O Emergency Overview It is an off white, odourless powder. It is not combustible or explosive. Short term exposure to the powder poses no hazard. Potential Health Effects - Inhalation: May causes irritation to the respiratory tract and choking depending on the degree of exposure. Ingestion: Do not ingest. Small quantities are not known to be harmful but large quantities can cause an obstruction causing pain in the digestive tract. Skin Contact: May cause irritation, dry skin and discomfort. Eye Contact: May cause immediate or delayed irritation or inflammation. With large amounts it can cause eye irritation, redness. Eye exposure requires immediate first aid. Chronic Exposure (inhalation): The product contains crystalline silica which with prolonged or repeated inhalation can cause disabling and fatal lung disease. Silicosis (prolonged inhalation of crystalline silica) increases risk of tuberculosis. Some studies show an increased incidence of chronic kidney disease and end stage renal disease in workers exposed to respirable crystalline silica. Medical Conditions aggravated by exposure: Individuals with lung disease can cause aggregation by exposure. 4. First Aid Measures Inhalation: Remove to fresh air. Seek medical attention for discomfort or if coughing. Ingestion: Do not induce vomiting .If conscious have person drink plenty of water. Get medical attention. Skin Contact: Wash with cool water and mild skin detergent. Seek medical attention for rash, irritation and prolonged unprotected exposure to wet gypsum. Eye Contact: Immediately flush eyes with water for at least 15 minutes, including lower eyelids. Seek medical attention for abrasions and burns. 5. Fire Fighting Measures Fire: Poses no fire related hazard. General Hazard: Avoid breathing dust. Fire Extinguishing Media: Use any means suitable for extinguishing surrounding fire. Fire fighting Equipment: A SCBA is recommended to limit exposures to combustion products when fighting any fire. 6. Accidental Release Measures. Put spilled material in a container. Avoid actions causing it to become airborne. Avoid inhalation and contact with skin. Wear appropriate PPE at all times. Do not wash gypsum down sewage and drainage systems. 7. Handling and Storage General: Keep bulk gypsum dry until used. Engulfment hazard. To prevent burial or suffocation, do not enter confined space. Gypsum can build up or adhere to walls of confined space. It can release or fall unexpectedly. Do not stand on stockpiles of gypsum, they may be unstable. Usage: Cutting, crushing, sanding or other crystalline silica bearing materials will release respirable crystalline silica. Housekeeping: Avoid actions causing the gypsum to become airborne during clean up. Use all appropriate measures of dust control or suppression. Clothing: Promptly remove and launder clothing that is dusty or wet with gypsum. Wash skin after exposure to gypsum. 8. Exposure Controls/Personal Protection Engineering Controls: Use local exhaust or other suppression methods to maintain dust levels. Skin Protection: Wear protective gloves, boot covers and clean body-covering clothing. Remove clothing and protective equipment that becomes saturated with wet gypsum and wash exposed areas. Eye Protection: Wear approved safety goggles when handling dust or wet gypsum to prevent contact with eyes. Wearing contact lenses under dust conditions is not recommended. Respiratory Protection: Under ordinary conditions no respiratory protection is required. Wear a approved respirator when exposed to dust above exposure limits. 9. Physical and Chemical Properties Appearance: White or off-white powder. Odour: None Solubility in water: Negligible Specific Gravity: 2.3 g/cm3 pH: 5-8 Boiling Point: >1000 C Freezing Point: None, solid Vapour Density NA. Vapour Pressure NA. Evaporation Rate NA. 10. Stability and Reactivity Stability: Stable. Avoid contact with incompatible materials. Hazardous Decomposition: Decomposes to sulphur oxide and calcium oxide above 1450 C Hazardous Polymerization: None. Incompatibilities: Gypsum is incompatible with acids. It contains silicates which may react with powerful oxidizers such as fluorine, chlorine trifluoride and oxygen difluoride. 11 and 12. Toxicological and Ecological Information Refer to contact information provided. 13. Disposal Considerations Dispose of waste and containers in compliance with applicable Federal, state, provincial and local regulations. Works Cited www.lafarge-na.com (Accessed: 16 November 2010) PREPARATION OF HOLDS On completion of discharge the mate decides on the procedure for cleaning of the holds on basis of time, manpower and next cargo to be loaded. Some cargoes require certain precautions in relation to cleaning of the holds. Gypsum on the other had requires no special preparation. Prior to commencement of cleaning it should be ensured that minimum amount of cargo is left behind by the stevedores. In the early stages of discharge of cargo like wheat when there are interruptions crew members can be sent into the hold to clean positions high under the deck head which will not be accessible during the later stages. This should only be done when there is no cargo working in the hold and it has been ascertained that there is no risk to the crew members. Before commencing work it should be ensured the cargo space is fully ventilated and a Permit to Work obtained. All crew to have proper PPE and safety equipment. The holds are to be swept prior washing in a manner whereby creating minimum dust clouds. The bilges should be checked so that no cargo has gotten in to them and if required get out the cargo before the completion of discharge. The stevedores should be requested to remove the sweepings gathered by the crew. If for reasons it is not possible it should then be stored in drums and kept ready for lifting by the ships cranes. When it is clear and permissible(taking account of the weather) to use the ships cranes the sweepings should be hoisted from the holds and stored on deck until such time when it would be possible to tip it overboard. Washing of holds is carried out by using sea water .Hand held hoses are used for this along with a water cannon. This combination uses compressed air to inject more pressure into the water from the mains. This provides a powerful jet which helps in better cleaning reaches high extremities of the holds. The washing sequence starts at the top of the holds and works down towards. Simultaneously a separate party of seamen will wash the hatch covers and comings with the help of hand held hoses. During this process the water should not be allowed to accumulate on the tank top. The bilges should be run continuously. A slight list to either side and maintaining a stern trim is the most effective method to aid in washing. Communication should be maintained with the bridge or the cargo control room to aid with the above. Once the higher extremities of the holds are washed the tank top is then hosed down to wash off the cargo residue and any dirt. The sounding pipes should also be flushed during washing as neglect of this over time causes the pipes to become blocked. When the salt water washing is complete traces of salt remain on the surface of the hold. If this is allowed to remain it helps in corrosion and is also not acceptable by most surveyors which is why the holds should be rinsed with fresh water. This rinsing also aids in accelerating the drying process. The drying of holds is usually carried out by natural ventilation, time permitting. If vessel is at sea and the waters are relatively calm the hatches can be opened up to speed up the process. The puddles formed by depressions in the tank top are sponged or mopped up by the crew. The water accumulated between the manhole surface and the lid will also have to be dried. The hold bilges should be drained of the unpumpable water, cleaned along with the strum boxes and then dried as well. Once the holds have dried an inspection should be carried out. Loose rust scales if found should be scrapped and cleared. Look for any cargo residue which may be spotted from the hold ladder high up. Bulk heads, tank tops are clean to touch. Look for any residues beneath manhole cover plates and behind pipes. Outlets for the CO2 system should be checked to ensure they are not blocked. If time permits DB tanks can be pressed up to check for any leakages in the holds. Holds to be also checked for damages in case they were missed out during discharge and if found recorded. Also if any maintenance as per the PMS or repair work needs to be carried out should be attended to, time permitting and recorded. A chalk test or a hose test can be carried out to check the water tight integrity of the hatch covers and any repairs if required and then logged. The final preparation would consist of resealing the manhole covers with duct tape. The bilge plate should be bur lapped and replaced to prevent the cargo from falling into the bilge. This system also allows the water to drain in the bilge. In the hold used for heavy weather ballast the gaskets along with the bolting of the watertight cover plate over the ballast suction should be checked. Works Cited South Tyneside College Notes. Isbester, J (1993), Bulk Carrier Practice HAZARDS ASSOCIATING WHEAT GYPSUM PRECAUTIONS Wheat: Is capable of self combustion due the gases given off. Dust is a major factor as it can affect personnel on deck with regard to respiration and cause irritation if it goes into the eyes. On exposure to wheat dust, personnel may also suffer from wheat rash. It can also affect the ships ventilation system if proper filters are not in place. The free flowing characteristics can reduce stability of a vessel caused by free surface effect (in partially filled holds) similar to liquids in partially filled tanks. Due to movement of the vessel the wheat is likely to shift to a side causing a list or even a possibility of capsizing the vessel. In cases where wheat requires fumigation in the form of pellets, gases or sprays all personnel to be made aware of the poisonous characteristics they pose and precautions to be taken. Precautions: All personnel on deck during cargo operations to be donned with proper PPE at all times, including disposable dust masks and safety goggles. Loading to be carried out as low as possible in holds to minimise dust. Wheat cargo has to be kept dry at all times and any form of water ingress has to be avoided to prevent damage to the cargo. As far as possible wheat should be avoided being loaded by partially filling holds. Where a vessel has partially filled holds she should be trimmed level in order to prevent shift of cargo. The surface of the partially filled holds should be secured by approved methods as mentioned in the IMO-grain rules. These methods used are strapping, lashing, saucering, over stowing and securing with wire mesh. In case fumigation is to be carried out on board the master is to be provided about details and precautions to be taken. The spaces to be fumigated have to have warning signs displayed. It is to be carried out by competent shore personnel. In cases where ships staffs presence is required during this operation, it has to be ensured that adequate respiratory protection is worn. Ventilation is required to a great extent to prevent condensation and removal of heat. The total weight of wheat should not exceed one-third of the ships deadweight. GM of 0.30 meters to be maintained or as given by formulae in the BC Code, whichever is greater. During discharge precautions to be taken by stevedores when using hydraulic equipment and grabs so that oil from such equipment does not damage the cargo. Gypsum: This type of cargo is generally not classified as a hazardous cargo. Airborne dust may cause irritation or inflammation to eyes. It could be harmful by inhalation depending on the level and duration of exposure as it contains crystalline silica. It could also cause skin discomfort to a certain level. It poses an engulfment hazard are personnel are advised not to stand on stock piles. It can also adhere to walls and can collapse and fall unexpectedly. Precautions: All personnel on deck during cargo operations to be donned with proper PPE at all times, including disposable dust masks and approved safety goggles. Actions to be avoided which can cause gypsum to become airborne. Bulk gypsum is to be kept dry until used as it tends to cake when in contact with water. It is recommended not to wash gypsum down sewage and drainage systems. Works Cited www.lafarge-na.com (Accessed: 16 November 2010) South Tyneside college notes MCA, MGN 284 (M+F) Swadi, D (2nd Edtn.), Cargo Notes IMO, International Grain Code LIFTING PLANT In order to have any equipment or machinery working effectively on board vessels a Planned Maintenance System should be in place and in effect. From an inspection of this maintenance record it is easy to keep track of details like when was the maintenance done last, what was done, when is it due next, what materials are required, how many man hours etc. The reason for this planning is so that we have the necessary tools, spares and consumables on board in advance prior to undertaking maintenance. The basic requirements of lifting plants are:- To keep the equipment in safe and good working order To maintain supporting documentation for the above. The main aspects of lifting plant maintenance are: Routine Inspection and Maintenance In addition to statutory inspections routine inspections are to be carried out by a competent person to asses if the plant is safe for continued use looking for problems like: Cracking at welds. Damaged/Missing grease nipples. Hydraulic oil leakage from motors. Worn or damaged wires. Corrosion. Missing markings. Lack of greasing and oiling. Defects to structure and fittings. Swivels that may not be rotating freely. Loose connection and gap between rails. All maintenance is carried out as per manufacturers instructions which also specify the time period (e.g. Weekly, monthly, yearly and before and after use).Prior to operation all control units, alarms, limit switches and joysticks should be operated and checked. If the plant is in regular use checks required by the external surveys should be done more by ships competent staff more often than once a year, even thou regulations require only an annual survey. Operation by Trained Personnel All vessels lifting plant should be operated by trained and certified personnel to avoid damages and improper use of the equipment. Trained personnel should also be appointed to direct the plant operator using approved hand signals as contained in COSWP. Testing Of Lifting Plant As per the manufacturers instructions the testing and certification of the lifting plant should be carried out at maximum intervals of 5 years. This testing is initially carried out after manufacture and installation of the plant at the ship yard under supervision of a competent person from the ship yard. The test is carried out using an approved proof load exceeding the SWL as specified under the merchant shipping regulations. This test is also required to be carried out if: Any repairs or modifications have been done which is likely to affect the SWL or the strength or stability of the equipment. Prior using any crane which has been idle for more than 6 months If it has been involved in an accident or mishap. Rigging Plan The rigging plans should be available at times along with sufficient technical details like: SWL of all fittings A means of identification Boom limiting angles Instructions for replacing wires and sheaves Dismantling procedures Erection procedures Certification and reports The master is to ensure that a certificate is on board within 28 days of a statutory test or examination for at least 2 years following receipt of next certificate. They are to be kept readily available on board for any dock worker using the ships plant. A register of lifting appliances along with items of loose gear are also kept on board. Works Cited Swadi, D (2009), Cargo Notes Dickie Short, Crane Hand book

John F. Kennedy :: essays research papers

John F. Kennedy was destined to be president of the United States. He would rather mold history than let history mold itself. John Kennedy was born in Brookline, MA in 1917. His mother was Irish and his father was a graduate of Harvard University and had entered the business world. After their arrival as immigrants, John’s grandparents entered politics. John had attended four different schools before attending Harvard. He first attended Dexter School in Brookline where he played football. He was then enrolled at the Riverdale Country Day School in Bronxville, NY because his father had moved for business reason. He had also attended the Canterbury School in New Milford, MA and then he spent his secondary school years at Choate in Wallingford, CT. As a student, Kennedy was average. He had potential of a great intellect and had a capacity to learn but he failed to apply himself. Therefore, he was happy as a B student. In 1946, JFK started down the road mapped out for him by his father. Since Kennedy was more of a scholar than a politician, it wasn’t easy when he ran for Congress from Massachusetts’ 11th district. Since his family was well known, he fit right in. He served in the House of Representatives for six years. Then in 1952, he ran for the Senate against Henry Cabot Lodge. He won and then began to capture the eyes of men in the Democratic Party. In 1956 he decided to run as the Democratic Vice Presidential nominee, but he lost to the Senator of Tennessee. His effort, however, earned him national prominence, exactly what he wanted. In 1960 he won the Democratic Presidential Contest. From that time on JFK had developed into one of the most effective speakers in the history of the presidency. While a junior member of the Senate in 1952, Kennedy me Jacquelin Lee Bouvier, who was working as a photographer for the Washington Times Herald. On September 12, 1953, they married in Hyannis Port on Cape Cod. Although Kennedy was not born a politician, he learned the trade fast. His quest for presidency started in 1959. His campaign was a very exhausting experience for him. He had planned early on that he would â€Å"cover everything, do everything and see everyone.† The highlight of the 1960 Presidential Campaign was the series of four television debates between Kennedy and his opponent, Richard M. Nixon. Even off screen, Kennedy had a way of turning the debates to his advantage. When the ratings were in, Kennedy had clearly passed up his opponent by a considerable margin. Many experts believe that his appearance on television was the key factor in winning most of the votes.

Kants Ethics vs Utilitarianism Essay

The two ‘core’ ethical theories covered in class that I started to assess are the categorical imperative and utilitarianism, both of which offer an approach to decision making in the context of social and interpersonal relationships. In this with in depth understanding of both that Kantian ethics is much easily appreciated than the ethics of utilitarianism as Kantian ethics apply to everyone yet both ethical approaches lead to faults. Utilitarianism is the moral theory that brings upon the greatest happiness. This theory illustrates that right actions as said to be right as they endorse happiness to someone or a group of people whereas wrong as they uphold unhappiness. Kantian ethics on the other hand puts a persons benefit before the greater good, that is people never should be used as means only but means to an end. Both Kant’s ethics and Utilitarianism greatly analogize between each other as Kant is deontological which means that someone ought to do things because they are right, as it is duty and that in itself makes it right. On the other hand Utilitarianism is based on consequence as someone should act to bring the greatest good to the greatest number of people. Utilitarianism does not care if the greatest good/benefit is brought with someone’s manipulation, lies or coercion. Kant’s ethical would disagree with this completely as If someone lies then it becomes universal law that everyone would have the right to do the same thing. Ethical implication arise from Kant’s ethics even if this in my opinion is a more logical means that a person should consider in ethical decision making. Suppose for example you would lose your friends for telling the truth in a given situation, Kant’s ethics says you shouldn’t lie what so ever because it is you duty not to do so would bring unhappiness and here utilitarianism would differ completely. Another situation where Kant’s ethics would coincide with itself is for example if a woman was trying to hide from a guy that was trying to kill her and you decided to help that woman by letting her stay in your house, few hours later the guy trying to kill that woman come knocking on your door asking about her whereabouts. Here with Kant’s ethics you can’t lie as it is your duty not to and it is also your duty to protect that woman you made a promise to earlier, in this situation one action must be chosen and this shows a major fault in Kant’s ethics. Utilitarianism has its benefits but requires much more effort to do than Kant’s ethics. There are two classical types of utilitarianism, which are act and rule utilitarianism. Act utilitarianism is right only if the result of good is just as much or more than any other available substitute. Rule utilitarianism states that an act is right if the rule itself acceptance would lead to a greater utility for society that any other substitute then that act is right. The strength of utilitarianism comes in the fact of it offering a system that is absolute, giving us a potential solution to every situation faced. The second strength is that is seems to grasp the sense of morality even though the actions are come with deceitful like lying means it is for the greater good, uplifting the suffering in this world. Utilitarianism has its objections and can be problematic as different people have different thought on what happiness is and what pleasure is. One of the problems that arise from Utilitarianism is the no rest objection, for example if I wanted to sleep or go to the movies at those moments I could be trying to help poor people or saving the environment to promote more utility. Having my salary should mostly go into helping others as this brings upon the greatest good but as you see this theory does not make sense to why I shouldn’t make myself happy. Trying to help all the time with no rest becomes too demanding and this theory fails understand different obligations making utilitarianism a false doctrine to many.

Free Essays on Attacking Environmental Problems

The protection of our environment is a hot topic today. Everyone talks about it, but no one seems to know what to do about the problems of cleaning up our world. People say I’m really concerned about the environment, but I’m only one person. What can one person do to make a difference? Instead of shrugging our shoulders and silently lamenting our lost paradise, we must begin to look at the ways each person can make an impact on improving environmental conditions. Individuals can take steps to reduce the present environmental problems. The first step is a political one. Citizens must get involved in the governing processes that lead to protection, not destruction, of our environment. Money speaks the loudest of all; we can support right thinking candidates with our contributions and our volunteer efforts. We can also actively support community efforts at recycling by encouraging our relatives and friends to participate in the programs. Another way to defend our environment is to change our habits of buying and discarding products. Everyone can contribute to recycling efforts by using only products that can be re used. At the supermarket, we can pass by the paper plates, napkins, and diapers. It may take more effort on our part to wash more dishes and do more laundry, but our landfills will not become enormous trash filled burdens on our children and their children if we stop throwing away tons of paper products. Other ways to cut down on waste include recycling newspapers and other paper publications, glass bottles and jars, aluminum steel cans, and plastic containers. It takes a bit of planning and extra time to separate recyclabe items from other trash, but each individual can make a difference by making the effort. Finally, individuals can make political and econonmic statements to the community by supporting environmentally responsible businesses. We can eat only at fast food restaurants that used recycled paper... Free Essays on Attacking Environmental Problems Free Essays on Attacking Environmental Problems The protection of our environment is a hot topic today. Everyone talks about it, but no one seems to know what to do about the problems of cleaning up our world. People say I’m really concerned about the environment, but I’m only one person. What can one person do to make a difference? Instead of shrugging our shoulders and silently lamenting our lost paradise, we must begin to look at the ways each person can make an impact on improving environmental conditions. Individuals can take steps to reduce the present environmental problems. The first step is a political one. Citizens must get involved in the governing processes that lead to protection, not destruction, of our environment. Money speaks the loudest of all; we can support right thinking candidates with our contributions and our volunteer efforts. We can also actively support community efforts at recycling by encouraging our relatives and friends to participate in the programs. Another way to defend our environment is to change our habits of buying and discarding products. Everyone can contribute to recycling efforts by using only products that can be re used. At the supermarket, we can pass by the paper plates, napkins, and diapers. It may take more effort on our part to wash more dishes and do more laundry, but our landfills will not become enormous trash filled burdens on our children and their children if we stop throwing away tons of paper products. Other ways to cut down on waste include recycling newspapers and other paper publications, glass bottles and jars, aluminum steel cans, and plastic containers. It takes a bit of planning and extra time to separate recyclabe items from other trash, but each individual can make a difference by making the effort. Finally, individuals can make political and econonmic statements to the community by supporting environmentally responsible businesses. We can eat only at fast food restaurants that used recycled paper...

Antonin Scalia essays

Antonin Scalia essays Supreme Court Justice Antonin Scalia was born on March 11, 1936 in Trenton, New Jersey to a Sicilian immigrant father and an Italian-American mother and was raised in Queens. He attended Catholic schools in New York City as a child and teen. Scalia then attended Georgetown University, spending his junior year at the University of Fribourg in Switzerland, and graduated at the top of his class with an A.B. (Sorry, I dont know what that means) in 1957. He also attended Harvard, serving as the editor for Law Review. Scalia graduated from Harvard in 1960. On September 10, 1960, Scalia married Maureen McCarthy, and the two went to go live in Cleveland, Ohio. While in Cleveland, Scalia was admitted to the Ohio Bar and worked for the law firm of Jones, Day, Cockley, and Reavis until 1967. The Scalias then moved to Virginia, and he was admitted to the Virginia Bar in 1970. While In Virginia, Scalia taught law at the Virginia Law School until 1974. In 1971, Scalia became General Counsel of the Office of Telecommunications Policy for the White House, and from 1972 to 1974, he was the chairman of the Administrative Conference of the US. Scalia was then appointed the assistant attorney general of the Office of Legal Counsel for the Department of Justice. In 1977, Scalia returned to teaching after 6 months serving as the resident scholar at the American Enterprise Institute in DC. Him and his family picked up and moved again to Chicago, Illinois. While In Chicago, Scalia taught at the University of Chicagos law school (he was also a visiting professor of law at his alma mater, Georgetown University, and also at Stanford University during that time) until President Ronald Reagan appointed him to the US Court of Appeals for the DC Circuit in 1982. Scalia took his oath of office on August 17 of that year. Four years after Scalia began working at the Court of Appeals, President Reagan then chose him to be an a ...

Land Of Desire essays

Land Of Desire essays The transformations that America went through in order to become a capitalist country were very significant and are sometimes looked past. However, in the book Land of Desire, the author, William Leach extensively goes into many of those things. There were many things that went into this ranging from specific poeple and incidents to outside places and things. Leach shows each individual ordeal and explains the personal effect that it had on the industry, as well as how society accepted, or in some cases condemned such things. All of this comes from his own education and understanding of the situation. He shows the drift into a capitalistic country as being a gradual change in one thing that then led to another, and to another, and so on. Not to mention that many, many things took part in it. And that if such things had not occurred, we would not be the country that we are today. There isn't a whole lot of information on William Leach, but he does appear to be a very well-thought out man. This is not his only historical book and he's also done other things, including the book True Love and Perfect Union: The Feminist Reform of Sex and Society, and editing The Wonderful Wizard of Oz. That specifically shows up a number of times in Land of Desire. He refers to L. Frank Baum (the author of The Wonderful Wizard of Oz) throughout the book, as well as to the book itself. Other than that, though, there's not much else I know about him, too bad it's not exactly the most helpful information as far as why he thinks the way he does. Leach broke the book up into 5 major parts. The first being the preface and the introduction. These two parts laid out the main ideas of the book. After that, Leach went into the three main sections of the book, which end up being the three main steps in the transformation into capitalism. The first entitled Strategies of Enticement, went into a litt...

Assignment 1 part 3 Example | Topics and Well Written Essays - 500 words

1 part 3 - Assignment Example Anna loved her sister Kate so much that though she also suffered from pains due to medical procedures, she never opposed her parents’ decision in favour of Kate’s health. However, during court trial it was also the same sisterly love which made her pursue the lawsuit against her parents for medical emancipation. During her testimony in court when Campbell asked her as to who convinced her to file a lawsuit, she replied, â€Å"Kate.† (p.449). She recalled the time when she saw Kate holding pills, purposely to end her life (p.460). Then, at one time, Kate convinced her not to donate her kidney by making her imagine a life where she could join hockey, go to any college she wants without having to worry about her sick sister (p. 462). Following her sister Kate’s advice of not donating her kidney, she thought of filing a case against her parents for medical emancipation. Secondly, parents’ love for their children is a value very much evident in the novel. Sara loved Kate so much that she was willing to do every thing for her daughter’s sake even to the extent of representing herself and her husband in court against her own youngest daughter’s claim for medical emancipation. Brian had been a very loving and supportive father to Anna by making her stay with him in the fire station for a couple of days as court hearing commenced. Before the hearing, Brian sympathized with her daughter Anna and vowed to take side with her, allowing her not to donate her kidney. Yet, during the trial, he burst into tears, expressing his wish for Anna to donate her kidney to save Kate’s life. That’s how strong his love was for Kate. In another incident, we also see Brian as a very loving father to Jesse when he discovered that Jesse committed arson in an elementary school near their house as all the clues were pointing to him. Yet, Brian kept it as a secret out of love for his son. This incident touched Jesse

Case Report Assignment Example | Topics and Well Written Essays - 250 words - 1

Case Report - Assignment Example One major factor that has contributed to the emergence of Apple as the global market leader in consumer electronics is a paradigm shift that took the company in a whole new direction (Parr, 1992). The new paradigm is founded on the principle that an organization’s management must focus on two most important facts. Firstly, there is need to focus on finding out what is valuable for customers in terms of the products and services that an organization has to offer (Parr, 1992). Secondly the management has to be involved in the process of creating as well as continuous improvement of the organization’s super system (Parr, 1992). As such, Apple’s management has been effective in all these aspects in terms of bringing the company to a desired future as well as endearing itself to the customers. Therefore, Apple’s SWOT analysis from the case study can be assessed as follows, among the company’s strengths include having a well informed and robust management that has taken a leading role in driving forward the company’s agenda. Similarly, The Company has a huge workforce that is highly skilled and capable of implementing the firm’s strategic plan. On the other hand, the company’s operation has also faced challenges due to the company’s weaknesses, including its expensive products that are often out of reach for most customers. Furthermore, the company’s systems are incompatible with other available systems, making it quite difficult for one to adopt a new system from Apple. Among the company’s opportunities include the growing market share, ability t o maintain an innovative culture and the company’s position as the market leader. Conversely, several threats such as emerging competition and substitute products can also affect the company‘s

Writing for Criminal Justice Administrators Essay - 1

Writing for Criminal Justice Administrators - Essay Example It generally extends the normal working days to beyond eight hours. However, it minimizes the number of consecutive days a person works to less than five, for instance, in a schedule of around three days of 12 hours or four days of ten hours. In this instance, it will be a schedule of three days of 12 hours. Compressed workweek is advantageous, for the employers it is for their advantage because it permits the extension of working hours and; thus, it also results in the reduction of expenses linked with start-up costs (starting operations). For the employees, it gives them fewer working days. These are among the many advantages that compressed workweeks offer both to the employer and to employee. It will be imperative if the 12-hour day work shift is adopted. This is concerning the meeting held on Thursday 14 February 2013 about the adoption of a 12-hour day work shift. Enough research has been done on the viability of the changes, and it is in our view that the changes be adopted. After consultation with various stakeholders in the company, we have found that the 12-hour work shift will work for the benefit of all of us. Therefore, it is our expectation that the management team will give us the necessary support and attention. We have gathered all the resources needed for the realization of the changes. Compressed workweek has become popular in most organizations because of its flexibility and other benefits. The 12-hour work shift schedule is the preferred choice by most employees. The schedule offers extraordinary coverage during the peak times. The popularity of the 12-hour work shift is attributed to the fact that it tends to provide more off-days and compress the workweek. The schedule also stimulates greater effort and increases the motivation of the workers. It is essential that the population characteristics of the worker be considered during the selection of the work schedules. The way

North African emigrants to Europe Research Paper

North African emigrants to Europe - Research Paper Example Even those who have settled in cities retain a village mentality and are seen as backward by the business and cultural elites in their home countries† (Europe, 2009). There are many intercultural dynamics. North Africans living in Belgium and France are living in a society that is multicultural on one hand, and oppressive towards them on the other. These European countries are no longer colonial occupiers of North African countries: they are destinations for immigration. However, in terms of giving it is also important to think about cultural communication in the light of multicultural society. In France, for example, Islamic culture is directed towards a situation, where people lose their uniqueness and individuality to compromise to a standard which means the loss of diversity reflections in mainstream assimilation culture. This idea of Europe as an immigration destination through metaphor has become challenged recently, and multiculturalism holds that assimilation into the mainstream culture is one thing, but keeping one’s own culture (and, in the case of Islam, for example, religion) extant is another that needs significant attention, and may not fit in with the French or B elgian immigration theory as it exists in general discourse. There should be no room in the delivery system for thinking that suggests that ability can be determined along racial lines. Establishing close ties to the local community is an effective way of eliminating this sort of out-group thinking that can lead to stereotyping and discrimination at the policy and funding levels. By establishing these links and nurturing them, France and Belgium can align the helping environment with the needs of the local community, rather than isolating it in terms of policy that does not reflect the wants and needs of the surrounding macrocosm of society. Race, nationality, and

661 questions 1 and 2 Assignment Example | Topics and Well Written Essays - 500 words

661 questions 1 and 2 - Assignment Example Organization change initiative may fail because of the following factors; overloading priorities, whereby, managers tend to have divided loyalty on which responsibility to undertake first causing a change initiative to be unsuccessful (Clemmer, 2001). Overconcentration on achievements may cause organization change to be unsuccessful because organization may over concentrate on quality and achievement and forgets on conducting an assessment to determine whether organization is moving retrogressively or progressively (Clemmer, 2001). Additionally, a change initiative may become unsuccessful if managers delegate duties and give instruction without leading others to implement those changes (Clemmer, 2001). In above connection, lack of proper coordination and communication between managers and stakeholders within an organization may make a change initiative to become unsuccessful (Clemmer, 2001). I experienced a revolutionary change from childhood to adulthood whereby, I had to make decisions without relying on my parents. However, my parents could develop some resistance because they could not admit that fact that I had become an adult who can make his own decision. This story may relate to the stories of Kodak, Hewlett, IBM and Mc Donald’s in chapter one in the sense that, in both stories there are some forms of resistance when carrying out a change (Palmer, Dunford & Akin, 2008). The most common issues across all the stories are that there is some form of resistance to change. For example; in Kodak Company, the announcement of reducing amount of dividend paid to shareholders in order to adopt new technology was faced with a lot of resistance by all stakeholders (Palmer, Dunford & Akin, 2008). In above connection, the HP CEO Fiona experienced resistance from both staff members and family when she declared a merger between Hp and

Love Assignment Example | Topics and Well Written Essays - 500 words

Love - Assignment Example In addition, the program seeks to expand the leadership abilities of individuals through adoption of programs that are focused at bringing change within the community. The program covers education institutions including colleges and universities. Chesapeake Bay Program awards an average of $1 million. In addition, the grant funds 20% of applications. Depending with the financial requirements of a project, Chesapeake Bay Program offers the funds for one year. Individual or institutions in need of grants can access the funds 6 to 8 months after the issuance of the request for proposal. The grant requires that a cost share of 25% of the total costs as stipulated by the project budget (2012-2013 Guidelines for Financial Support Grants). Online or mail applications can be used to apply for Chesapeake Bay Program grant. Source Reduction Assistance Grant Program is another key source of funds. The program covers clubs and organizations, communities groups and local organizations that aim at eradicating the toxic substances used by young people. With an annul award of between $1.1 million-$1.7 million, the program funds 15% of the grant applicant. In addition, projects are funded in annual bases. According to Source Reduction Assistance Grant Program, recipients of the grant should provide 5% of the allowable project cost that can be inform of in-kind contributions such as equipments or in form of cash (Samuel, 2007). Application for Source Reduction Assistance grant can be done online or through mail after which the successful applicants receive Grants between May and

North African emigrants to Europe Research Paper

North African emigrants to Europe - Research Paper Example Even those who have settled in cities retain a village mentality and are seen as backward by the business and cultural elites in their home countries† (Europe, 2009). There are many intercultural dynamics. North Africans living in Belgium and France are living in a society that is multicultural on one hand, and oppressive towards them on the other. These European countries are no longer colonial occupiers of North African countries: they are destinations for immigration. However, in terms of giving it is also important to think about cultural communication in the light of multicultural society. In France, for example, Islamic culture is directed towards a situation, where people lose their uniqueness and individuality to compromise to a standard which means the loss of diversity reflections in mainstream assimilation culture. This idea of Europe as an immigration destination through metaphor has become challenged recently, and multiculturalism holds that assimilation into the mainstream culture is one thing, but keeping one’s own culture (and, in the case of Islam, for example, religion) extant is another that needs significant attention, and may not fit in with the French or B elgian immigration theory as it exists in general discourse. There should be no room in the delivery system for thinking that suggests that ability can be determined along racial lines. Establishing close ties to the local community is an effective way of eliminating this sort of out-group thinking that can lead to stereotyping and discrimination at the policy and funding levels. By establishing these links and nurturing them, France and Belgium can align the helping environment with the needs of the local community, rather than isolating it in terms of policy that does not reflect the wants and needs of the surrounding macrocosm of society. Race, nationality, and

Love Assignment Example | Topics and Well Written Essays - 500 words

Love - Assignment Example In addition, the program seeks to expand the leadership abilities of individuals through adoption of programs that are focused at bringing change within the community. The program covers education institutions including colleges and universities. Chesapeake Bay Program awards an average of $1 million. In addition, the grant funds 20% of applications. Depending with the financial requirements of a project, Chesapeake Bay Program offers the funds for one year. Individual or institutions in need of grants can access the funds 6 to 8 months after the issuance of the request for proposal. The grant requires that a cost share of 25% of the total costs as stipulated by the project budget (2012-2013 Guidelines for Financial Support Grants). Online or mail applications can be used to apply for Chesapeake Bay Program grant. Source Reduction Assistance Grant Program is another key source of funds. The program covers clubs and organizations, communities groups and local organizations that aim at eradicating the toxic substances used by young people. With an annul award of between $1.1 million-$1.7 million, the program funds 15% of the grant applicant. In addition, projects are funded in annual bases. According to Source Reduction Assistance Grant Program, recipients of the grant should provide 5% of the allowable project cost that can be inform of in-kind contributions such as equipments or in form of cash (Samuel, 2007). Application for Source Reduction Assistance grant can be done online or through mail after which the successful applicants receive Grants between May and

The Courtroom Scene Essay Example for Free

The Courtroom Scene Essay The Crucible was written at the peak of the McCarthism era in the mid 20th century. The play was written by Arthur Miller to show the similarities between The McCarthy Trials and the Salem Witch Trials. This links well to the Crucible.  The play is about a group of girls who are caught in the woods performing witch-like actions. The girls turn against everyone and start accusing people of being witches. This immediately creates tension. In this essay, I am going to answer the question How does Miller create tension in Act III, The Courtroom Scene? He creates tension in a number of ways. These ways are stage directions, events, language and friction between characters.  Firstly, Arthur Miller uses stage directions to create tension in Act III. A particular example of this is when Goody Proctor is intensely questioned for the truth of her husbands affair. The stage direction In a crisis of indecision, she cannot speak. This shows how she is lacerated between covering up for her husband or telling the truth. The situation that is so thrilling is that if she lies, she will of helped Abigail, as Abigail would be able to carry on with her mischievous doings. And if she tells the truth then Abigail would be found guilty of lying and false accusations. The direction builds tension, as the audience already know that John Proctor has confessed to the affair with Abigail, and Goody Proctor doesnt know this.  Secondly. Miller creates tension by using events in Act III. The best example of this is on page 101, when Abigail and her girl friends are pretending that Mary Warren has convoked her spirit onto them. This is shown when Abigail says why ? why do you come, yellow bird? We as the audience automatically feel tension as we know Abigail and the girls are making all these alleged allegations up. We feel sorry for Mary Warren, as now she is being portrayed as an evil person. John Proctor is the only person who believes Mary Warren and does think Abigail and the girls are lying. He shows his feelings by saying Theyre pretending, Mr Danforth! This creates tension as we feel that Proctor and Mary Warren are helpless. Proctor needs to help Mary Warren, as Goody Proctor will be persecuted if Abigail and the girls are not brought to justice. Another event that takes place and creates tension is on page 104/105. This piece of tension links well to the last piece. The even is that after all of the commotion and lying from Abigail and the girls of Mary Warren summoning a spirit. Mary apologises for sending the spirit, even though it was a lie. This automatically creates tension as the audience are dumfounded by what Mary is doing. She is now covering up for the girls. So they dont get the blame. When she says sorry. Abigail hugs her and they seem to be friends again. This leaves the judges baffled. This creates tension in a different way as well because Proctor is all alone now. The only way to save his wife is Mary Warren telling the truth, now she has turned against him. The audience feel sorry for Proctor, who should know by now that he and his wife are going to be persecuted. Thirdly, Arthur Miller creates tension by using friction between characters in Act III. There are two excellent examples of this. Firstly, Mary Warren explains to the court of how Proctor wakes her up at night and says how they should over throw the court to save this wife. This friction is huge because just before Mary Warren states this the court, Mary and Proctor where helping each other. Mary and Proctor were helping each other. This creates tension because Proctor was left by Mary when she said sorry to Abigail for summoning her spirit, and now Mary has made allegation against Proctor. Nothing more could go wrong for him. Mary goes on to say that Proctor has threatened her as well. Ill murder you, he says, if my wife hangs! Thus creates tension as Mary and Proctor were friends but now he is threatening her. The audience feel an agonising heart-break for Proctor, yet feel he shouldnt of threatened Mary. The friction has built up again. Secondly, on page 105, Proctor says that his and Danforths faces are like the devils. Proctor says, I see his filthy face! And it is mine and your Danforth It creates friction because Danforth is appalled that Proctor could relate him to the devil. Between these too character there has always been friction because Proctor believes the girls are lying, whereas Danforth doesnt. When Proctor says this he means that Danforth has the face of the devil for allowing all of these false accusation to happen. Proctor has the face of the devil because he had the affair with Abigail, which sparked the whole event. Lastly, language in The Crucible creates tension. An example o this is on page 98, when John Proctor admits he lusted for Abigail and tells the truth about the affair and how Abigail is trying to get revenge. The line is She thinks to dance with me on my wifes grave!! This language is difficult for the audience to understand, as it is old English. This creates tension because it could mean different things and as the audience doesnt know what it means, it lets imaginations come out and start to think what he means.  To conclude Arthur Miller uses and creates tension to a full effect and pulls it off with great strength. The tension was good and easy to create as he used four main elements, stage directions, events, frictions between characters and language.

Biomedical instrumentation and measurement

Biomedical instrumentation and measurement INTRODUCTION: SA node controls the rate of hearts muscular contractions which enables the heart to circulate the blood throughout the body according to the need. Small variations in the heart beat are not harmful but in some cases due to malfunctioning of the hearts electrical system, the heart rate varies drastically resulting in different types of arrhythmias. These cardiac arrhythmias are serious disorders which should be treated immediately. Arrhythmias like bradycardia (low heart rate) can be treated using Pacemakers. Pacemakers can be implanted in the patients heart for permanently stimulating the heart. It is used for patients for whom the SA node is no longer functioning properly. External Pacemakers are also available which is used to treat temporary heart rate variations. It is used for a short period of time before the implanting the Internal Pacemakers in the heart. In order to understand the requirement of pacemakers, it is necessary to understand the functioning of the heart and its electrical system. HEART ITS ELECTRICAL SYSTEM: Heart is a pumping device which is used to circulate the blood throughout the body. It has four chambers namely Right Atrium, Left Atrium, Right Ventricle and Left Ventricle. The right atrium receives the deoxygenated blood from the entire body through the superior vena cava and inferior vena cava. The left atrium receives oxygenated blood from the lungs through the pulmonary veins. When the atrium contracts the blood flows to the corresponding ventricle. This is due to atrial depolarization. When the left ventricle contracts, the oxygenated blood is supplied to all tissues in the body through the aorta. This is due to ventricular depolarization. Similarly, the deoxygenated blood is pumped to the lungs for oxygenation through the pulmonary artery during the contraction of right ventricle. This is due to ventricular repolarization. The Electrical conduction system of the heart consists of SA node, AV node, Bundle of His, Purkinje Fibers. The chambers of the heart should be stimulated electrically for contraction. The stimulations are provided by the SA node (Natural Pacemaker of the heart) which is located in the right atrium of the heart near the entrance of the superior vena cava. Although all the heart cells have the ability to produce electrical pulses which can stimulate the heart, SA node triggers the heart. The fact that SA node produces pulses at a higher rate when compared to other potential cells which can stimulate contraction, contributes to this phenomena. The contraction of various chambers of the heart is characterized in a very specific manner. As the electric pulses pass through each chamber of the heart, they are stimulated to contract. The SA node first triggers the right and left atrium to contract. Then the impulses travel to the AV node which is located between the atria and the ventricles . From AV node ,the pulses travel to the bundle of his. The pulses travel to the individual ventricles through the right and left bundle branch and reach the Purkinje fibers. If the SA node fails, then the AV node acts as the primary pacemaker. If the AV node fails, then the Purkinje fibers takes the responsibility. The SA node receives blood supply from right and left coronary arteries. Under ischaemic conditions, the death of the affected cells will stop the SA node from triggering the heart beat. There is a period of time following the stimulation of heart muscle during which no other action potential can trigger the heart muscles. This period is known as Absolute or Effective Refractory Period (ERP) of heart. It is normally around 0.4 sec. ERP is maintained as high as possible in order to maintain tachycardia and to coordinate the muscle contraction. The anti-arrhythmic drugs taken by the patients usually prolongs the ERP. ELECTRICAL SYSTEM OF HEART ECG ITS SIGNIFICANCE: The electrical activity of the heart muscles is recorded as Electrocardiogram (ECG). It can be acquired non-invasively from the surface of the body by following specific lead configurations. The electrical current generated in the heart due to depolarization and repolarization is spread not only within the heart but also throughout the body. So, ECG can be easily acquired from the surface of the body through electrodes. ECG has four basic components namely, P wave, QRS complex, T wave and U wave. P wave occurs during atrial contraction due to atrial depolarization. The duration of the P wave ranges from 0.08- 0.1 sec. During the atrial depolarization, the impulse from the SA node spreads throughout the atrium. The time period between the onset of the P wave and the beginning of the QRS complex is about 0.12- 0.2 sec. During the zero potential period between the P wave and QRS complex, the impulse travels within the AV node and the Bundle of His.QRS complex occurs during ventricular c ontraction due to ventricular depolarization. The duration of the QRS complex ranges from 0.06-0.1 sec. T wave occurs during ventricular relaxation due to ventricular repolarization. Sometimes, a small positive U wave occurs following the T wave due to the last remnants of the ventricular repolarization. ELECTROCARDIOGAM NORMAL AND ABNORMAL ECG WAVES: Normal ECG: NORMAL ECG Heart rateis nothing but the number ofheartbeatsper unit oftimewhich is expressed as beats per minute (bpm) which can vary as the bodys need for oxygen changes, such as duringexercise or sleep. The measurement of heart rate is used bymedical professionalsto assist in thediagnosisand tracking of medical conditions. It is also used by individuals, such asathletes, who are interested in monitoring their heart rate to gain maximum efficiency from their training. TheR waveto R wave interval(RR interval) is the inverse of the heart rate ,that is one divided by RR interval gives the heart rate. Typical healthy resting heart rate in adults is 60-80 bpm which is referred to be normal heart rate,with rates below 60 bpm referred to asbradycardia and rates above 100 bpm referred to astachycardia. Missed ECG: MISSED ECG This can be detected when the R-R interval is twice the actual R-R interval (for normal subjects).Heart pulses misses at some intervals and does not follow the premature heart beat. Bradychardia: BRADYCARDIA This is a critical reduction of heart rate and characterized by normally directed abnormally wide P waves and normal PR interval. Whenever the R-R interval exceeds 1 sec the heart rate goes below 60 and the condition is referred to as Bradychardia. There are three types of Bradychardia conditions based on the characteristics of the ECG wave, they are Sinus bradychardia, Atrio-ventricular nodal bradychardia and ventricular bradychardia respectively. They are discussed below. Sinus bradycardia: SINUS BRADYCARDIA Sinus bradycardias are also called as Atrial bradychardias. This bradychardia condition is usually found in young and healthy adults. The symptoms represent with the individualsrespirations. Theabnormalpattern of eachinhalationcorresponds with the heart rate decreasing.Expirationcauses an increase in the hearts rate of contraction. This is thought to be caused by changes in the vagal tone duringrespiration. Sinus bradycardia is a sinus rhythm of less than 60 bpm. It is a common condition found in both healthy individuals and those who are considered wellconditioned athletes. The reason for this is that their heart muscle has become conditioned to have a higher stroke volume and therefore requires fewer contractions to circulate the same volume of blood. Sick sinus syndromecovers conditions that include severe sinus bradycardia, sinoatrial block, sinus arrest, and bradycardi-tachycardia syndrome (atrial fibrillation, flutter, and paroxysmal supraventricular tachycardia). Atrio ventricular nodal bradycardia: ATRIO VENTRICULAR NODAL BRADYCARDIA An atrio ventricular nodal bradycardia or AV junction rhythm is usually caused by the absence of the electrical impulse from thesinus node. This usually appear on anEKGwith a normal QRS complexaccompanied with an inverted P wave either before, during, or after the QRS complex. An AV junctional escape is a delayed heartbeat originating from anectopicfocus somewhere in theAV junction. It occurs when the rate ofdepolarizationof the SA node falls below the rate of the AV node.This dysrhythmia also may occur when the electrical impulses from the SA node fail to reach the AV node because of SA or AV block.This is a protective mechanism for the heart, to compensate for a SA node that is no longer handling the pace making activity, and is one of a series of backup sites that can take over pacemaker function when the SA node fails to do so. This would present with a longerPR interval. A junctional escape complex is a normal response that may result from excessive vagal tone on the SA node. Pathological causes include sinus bradycardia, sinus arrest, sinus exit block, or AV block. Ventricular bradycardia: VENTRICULAR BRADYCARDIA This picture shows an ECG of a person with an abnormal rhythm (arrhythmia) called an atrioventricular (AV) block. P waves show that the top of the heart received electrical activity. Each P wave is usually followed by the tall (QRS) waves. QRS waves reflect the electrical activity that causes the heart to contract. When a P wave is present and not followed by a QRS wave (and heart contraction), there is an atrioventricular block, and a very slow pulse (bradycardia). PACEMAKER AND ITS SIGNIFICANCE: More than 60% people fall victim to heart attacks in most of the countries around the globe every year and thousands more are critically injured in accidents. Taking care of these patients in special care units involves the usage of specialized equipments like pacemakers along the other important ones. In the past few years electronic pacemaker systems have become the important one in saving lives of cardiac patients whose normal pacing functions have been impaired. Depending on the exact nature of a cardiac dysfunction, a patient may require temporary artificial pacing during the course of treatment or permanent pacing in order to lead an active, productive life after treatment. A device capable of generating artificial pacing impulses and delivering them to the heart is known as a pacemaker system (commonly called a pacemaker) and consists of a pulse generator and appropriate electrodes. Pacemakers are available in a variety of forms. They are mainly divided into two types External pacemakers and Internal pacemakers respectively. EXTERNAL PACEMAKER: External pacemakers are used on the patients with temporary heart irregularities, such as those encountered in the coronary patient, including heart blocks. They are also used for temporary management of certain arrhythmias that occur in the patients during critical postoperative periods and in the patients during cardiac surgery, especially if the surgery involves the values or septum. An external pacemaker usually consists of an externally worn pulse generator connected to electrodes located on or within the myocardium. External pacemakers, which include all types of pulse generators located outside the body, are normally connected through wires introduced into the right ventricle via a catheter catheter. The pulse generator may be strapped to the lower arm of a patient who is confined to bed, or worn at the midsection of an ambulatory patient. We have made the pacemaker which can be divided into two general categories namely Asynchronous pacemaker Synchronous pacemaker ASYNCHRONOUS PACEMAKER: This type of pacemaker is intended for patients having permanent heart blocks. The rate is preset. It can be varied externally within the range of 60 PPM to 180 PPM. Since this pacemaker functions regardless of the patients natural heart rhythm it poses a potential danger because of competition between the patients rhythm and that of the pacemaker. PACING PULSES FROM ASYNCHRONOUS PACEMAKER SYNCHRONOUS PACEMAKER: In patients who have normal heart function most of the time, asynchronous pacing can be extremely dangerous, working against their own physiological pacemaker with the danger of stimulating in the vulnerable period of the T wave, a condition that can result in fibrillation. The demand pacemaker consists of an ECG amplifier and a conventional pacemaker output pulse circuit that has been modified to allow output from the ECG amplifier to inhibit the pulse generator. This pacemaker senses R-waves and its timing and logic circuits count out an elapsed time interval following an R-wave or previously induced pulse. If the intrinsic R-wave does not appear before the elapsed time interval, the ventricle is stimulated. If an R-wave is received, the counter is reset again. This type of pacemaker is used for patients with bradycardia, and it ensures a heartbeat no slower than its set rate. PACING PULSES FROM SYNCHRONOUS PACEMAKER INTERNAL PACEMAKER: Internal pacemaker are implanted within the pulse generator placed in a surgically formed pocket below the right or left clavicle, in the left subcostal area, or in women, beneath the left or right major pectoralis muscle. Internal leads connect to electrodes that directly contact the inside of the right ventricle or the surface of the myocardium. The exact location of the pulse generator depends primarily on the type of the electrode used, he nature of the cardiac dysfunction, and the method (mode) of pacing that may be prescribed .Since there are no external connections for applying power, the pulse generator must be completely self contained, with a power source capable of continuously operating the unit for a period of years. BIO POTENTIAL ELECTRODES: A wide variety of electrodes can be used to measure bio electric events but nearly all can be classified as belonging to one of three basic types; Micro electrodes Skin surface electrodes Needle electrodes All three types of bio potential electrodes have the metal-electrolyte interface. In each case, an electrode potential is developed across the interface, proportional to the exchange of ions to the metal and the electrolytes of the body. MICROELECTRODES: They are used to measure bio electric potentials near or within a single cell.Microelectrodes are electrodes with tips sufficiently small to penetrate a single cell in order to obtain readings from within the cell. The tip must be small enough to permit penetration without damaging the cell. This action is usually complicated by the difficulty of accurately positioning an electrode with respect to a cell. Because of their small surface area, they have impedances well up into the megohms. For this reason, amplifiers with extremely high impedances are required to avoid loading the circuit and to minimize the effects of small changes in interface impedance. SKIN SURFACE ELECTRODES: Skin surface electrodes are used to obtain bio electric potentials from the surface of the body. They are available in various size. Although any type of surface electrode can be used to sense ECG, EMG, EEG potentials, the larger electrodes are usually associated with ECG, since localization of the measurement is not important. Smaller electrodes are used in EEG and EMG measurements. Various types of disposable electrodes have been introduced in recent years to eliminate the requirement for cleaning and care after each use. In general, disposable electrodes are of the floating type with simple snap connectors by which the leads, which are reusable, are attached. Although, some disposable electrodes can be reused several times, their cost is usually low enough that cleaning for reuse is not warranted. They come pre gelled, ready for immediate use. NEEDLE ELECTRODES: To reduce interface impedance and, consequently, movement artifacts, some electroencephalographers use small subdermal needles to penetrate the scalp for EEG measurements. They are also used to measure EMG potentials from a specific group of muscles. They are less susceptible to movement artifacts when compared with surface electrodes as they create an interface beneath the surface of the skin. By making direct contact with the subdermal tissue or the intercellular fluids, these electrodes also seem to have lower impedances than surface electrodes of comparable interface area. Even though needle electrodes have less motion artifacts ,surface electrodes are used to acquire ECG because surface electrodes are more convenient for the patient .Most of the surface electrodes are cheap and reusable. ACQUISITION OF ECG USING 3 LEAD SYSTEM LEAD I CONFIGURATION: ECG sensors measure the time-varying magnitude of electric fields emanating from the heart. ECG values are measured by placing non-invasive electrodes at the surface of the patients skin. For a 3-lead ECG sensor, the electrodes need to be placed in a triangle (Einthoven Triangle) on the patients chest as shown in the figure 11. Each corner of the triangle corresponds to one of the limbs: right hand, left hand, left foot. With the bipolar system, one limb is connected to the positive terminal of the amplifier and another limb to its negative terminal. Three limbs (right arm-RA, left arm-LA and left leg/foot-LL) are used. The right leg was used as earth, to minimize interference. ECG AMPLIFIER: Bioelectric signals have very high input impedance. To stop the signal attenuation, we use Instrumentation Amplifier (AD 624) which also has high input impedance. It should have high gain and low output impedance .In order to remove the common mode signals ,it should have a high Common Mode Rejection Ratio (CMRR of about 90 dB).The potential at the surface of the body ranges from 0 10 mV so the amplifier should have high gain (1000). We use a differential amplifier to amplify the bioelectric signals that occur as a potential difference between two electrodes, the bioelectric signals are applied between the inverting and non-inverting inputs of the amplifier. The signal is therefore amplified by the differential gain of the amplifier. For the interference signal, however, both inputs appear as though they were connected together to a common input source. Thus, the common mode interference signal is amplified only by the much smaller common mode gain. The electrode impedances form a v oltage divider with the input impedance of the differential amplifier. If the electrode impedances are not identical, the interference signals at the inverting and non-inverting inputs of the differential amplifier may be different, and the desired degree of cancellation does not take place. Because, the electrode impedances can never be made exactly equal, the high common mode rejection ratio of a differential amplifier can only be realized if the amplifier has an input impedance much higher than the impedance of the electrodes to which it is connected. There are different lead configurations such as 3-Lead, 5-Lead, 12-Lead for acquiring ECG Signal. We have used 3-Lead system Lead I Configuration. 12-CIRCUIT FOR ECG AMPLIFIER AMPLIFIER OUTPUT SOFTWARE IMPLEMENTATION USING LABVIEW: LabVIEW (short for Laboratory Virtual Instrumentation Engineering Workbench) is a platform and development environment for Visual Programming Language from National Instruments. LabVIEW is a graphical programming environment used by millions of engineers and scientists to develop sophisticated measurement, test, and control systems using intuitive graphical icons and wires that resemble a flowchart. LabVIEW offers unrivaled integration with thousands of hardware devices and provides hundreds of built-in libraries for advanced analysis and data visualization. The LabVIEW platform is scalable across multiple targets and operating systems. LABVIEW is a GUI (Graphical User Interface) which can be used for processing of signals, images and other forms of data. One of the most powerful features LabVIEW offers engineers and scientists is its graphical programming environment. With LabVIEW, one can design custom virtual instruments by creating a graphical user interface on the computer screen through which one can: Operate the instrumentation program Control selected hardware Analyze acquired data Display results One can customize front panels with knobs, buttons, dials, and graphs to emulate control panels of traditional instruments, create custom test panels, or visually represent the control and operation of processes. The similarity between standard flow charts and graphical programs shortens the learning curve associated with traditional, text-based languages. The behavior of the virtual instruments can be determined by connecting icons together to create block diagrams, which are natural design notations for scientists and engineers. With graphical programming, one can develop systems more rapidly than with conventional programming languages, while retaining the power and flexibility needed to create a variety of applications. We have used Lab view to acquire the signal, filtering and do other processing of the ECG signal. The real time signal is given into as input to ELVIS I which acts as the DAQ (data acquisition system).The block diagram of the Lab view implementation is as shown in figure 14. STEPS INVOLVED IN LABVIEW IMPLEMENTATION: The ECG signal from the amplifier (using AD 624) is given as input to DAQ for acquiring the signal in Lab view software. FFT of the ECG signal is obtained and viewed. We can see the frequency content of the ECG signal from the FFT obtained. WE can also see the presence of 50 Hz power line interference in the FFT of raw ECG. A Smoothing filter with following specifications Moving average, Rectangular filter with a half width of 20 is constructed. The Smoothened ECG is viewed. Smoothing Filter is used to remove noise and 50 Hz power line interference. The Smoothened signal is given as input to the Butterworth Band Pass Filter of order 2 and a low cutoff frequency of 5Hz and high cut off frequency of 15Hz.Band Pass Filter is used to separate the QRS complex from the ECG Signal. The output of the Band Pass Filter is differentiated and squared inorder to enhance the QRS complex from the remaining portion of the waveform. The heart rate is calculated using timing and tone measurement block. The block gives the frequency of repetition of the QRS complex. The frequency value is converted into time value by taking inverse of it. Heart rate is calculated as follows. Heart Rate = 60/R-R Interval Example: R-R Interval = 760ms Heart Rate = 60/760ms = 78.94 Beats /Minute If the calculated heart rate is below the normal value, then pacing pulses are produced .This is done by using a case structure. The case structure turns on only when the case is true (Heart Rate is below normal value).Inside the case structure we have a square wave generator. The output of the square wave generator is differentiated and squared. We get a pulse as a result of these operations. The rate and amplitude at which the pulses are produced can be modified easily at run time using controls. Whenever the heart rate is normal, False condition is selected . For false condition, we set the amplitude and frequency of the square wave as zero so that the pacemaker is switched off. The Pacing Pulses generated can also be taken out as an analog voltage from the ELVIS and can be viewed in a DSO. Only voltages in the range +10 volts to -10 volts can be taken out from LABVIEW through ELVIS. PACEMAKER FINAL BLOCK DIAGARM. FRONT PANEL IN LABVIEW ENTIRE SOFTWARE IMPLEMENTATTION We have implemented the case structure and other blocks by studying the general tutorials given in LV BASICS 1 MANUAL and LABVIEWBASICSII_85_ENG CLAD. HARDWARE IMPLEMENTATION: BLOCK DIAGRAM FOR HARDWARE IMPLEMENTATTION BAND PASS FILTER: The amplifier which is used in software implementation (AD 624) is also used here. It is followed by a filter. The amplifier output is around 550 mV. A Filter is a circuit that is defined to pass a specified band of frequencies while attenuating all signals outside this band. Filter networks may be either active or passive. Passive filter networks contain only resistors, inductors and capacitors. Active filters employ transistors or op amps plus resistors, inductors and capacitors. Inductors are often used in active filters, because they are bulky and costly and may have large internal resistive components. Band Pass Filters pass only a band of frequencies while attenuating all frequencies outside the band. A simple high pass filter followed by a low pass filter will form a band pass filter. We have used a band pass filter (0.5Hz 40 Hz) to remove high frequency signals like EMG and low frequency components like Base Line Wandering and motion artifacts. We have used a second order Bu tterworth Filter with -40 db/decade roll-off. For Low Pass Filter, we used 0.5 Hz as the cut off frequency.C1 is chosen as a convenient value between 100 pF and 0.1Â µF.For High Pass Filter, we used 40 Hz as the cut off frequency. We have implemented a Band Pass Filter according to the design given in OPERATIONAL AMPLIFIERS AND LINEAR INTEGRATIONAL CIRCUITS. CIRCUIT AND DESIGN FOR BAND PASS FILTER NOTCH FILTER: A Notch Filter transmits frequencies in the pass band and rejects undesired frequencies in the stop band. In applications where low level signals must be amplified, there may be present one or more of an assortment of unwanted noise signals. Examples are 50, 60 0r 400 Hz frequencies from power lines, 120 Hz ripple from full wave rectifiers, or even higher frequencies from regulated switching type power supplies or clock oscillators. If both signals and signal frequency noise component are passed through a notch filter, only the desired signals will exit from the filter. The noise frequency is notched out. We have designed a active notch filter (using LM 324) to remove 50 Hz Power Line Interference. The amplitude of the acquired ECG signal is around 1 2 V. We got noise free ECG for real time signal acquisition as shown below. CIRCUITAND DESIGN FOR NOTCH FILTER REAL TIME ECG ACQUISITION QRS DETECTOR: In order to extract the QRS Complex from the ECG signal obtained, we use a band pass filter with center frequency of 17 Hz and band width of 6 Hz. The QRS signal obtained from the band pass filter is rectified for comparing with the threshold voltage generated by the detection circuit. The filtered and rectified ECG is stored on a capacitor. This filtered and rectified ECG is compared with the fraction of this voltage. Whenever a threshold voltage is exceeded, the QRS pulse is detected. After the detection of every QRS pulse, the capacitor recharges to a new threshold value after every pulse. CIRCUIT FOR QRS DETECTION MONOSTABLE MULTIVIBRATOR: Monostable Multivibrator generates a single output pulse in response to an input signal. It is also known as One Shot Multivibrator. The time period of the output pulse depends only on the external components (resistors and capacitors) connected to the op-amp. The duration of the input triggering pulse can be longer or shorter than the expected pulse. The duration of the output pulse is represented by the T. Since T can be changed only by changing the resistors and capacitors ,the one shot multivibrators can be considered as a pulse stretcher. This is because the width of the pulse can be longer than the input pulse. In a stable or standby state, the output of the multivibrator is zero or low-level logic. The output of the multivibrator is forced to go high (ËÅ"Vcc) when an external trigger is given. The output stays zero until the next triggering pulse is given. Then the cycle repeats. The monostable multivibrator has only one stable state. Hence, the name monostable. The QRS detector gives a pulse for QRS detected which is given as an input trigger for a monostable multivibrator. This monostable multivibrator is used to produce a positive pulse (amplitude 5V) of desired pulse width for every input triggering (negative edge triggering) from the QRS detector. We had used 555 Timer as a monostable multivibrator. MULTIVIBRATOR OUTPUT Thus, the analog section of the project gets over with multivibrator. The output of the multivibrator is processed using PIC18F 4550 Microcontroller. It marks the beginning of the controller section. MICROCONTROLLER: PIC is a family of Harvard architecture microcontrollers made by Microchip Technology, derived from the PIC1640 originally developed by General Instruments Microelectronics Division. The name PIC initially referred to Programmable Interface Controller, but shortly thereafter was renamed Programmable Intelligent Computer. PICs are popular with developers and hobbyists alike due to their low cost, wide availability, large user base, extensive collection of application notes, availability of low cost or free development tools, and serial programming (and re-programming with flash memory) capability. Like all Microchip PIC18 devices, PIC18F4550 family are available as both standard and low-voltage devices. Standard devices with Enhanced Flash memory, designated with an F in the part number (such as PIC18F4550),accommodate an operating VDD range of 4.2V to 5.5V.Low-voltage parts, designated by LF (such as PIC18LF4550), function over an extended VDD range of 2.0V to 5.5V. Our project uses a standard PIC 18F4550.Hence this microcontroller uses a flash program memory of 24K bytes .It is a 8-bit microcontroller and so they handle data as 8-bit chunks. PICs have a set of registers that function as general purpose ram. Special purpose control registers for on-chip hardware resources are also mapped into the data space. The addressability of memory varies depending on device series and in PIC 18F4550 external code memory is directly addressable which is an exceptional feature compared to baseline and mid line core devices. PICs have a hardware call stack, which is used to save return addresses. The hardware stack is not software accessible on earlier devices, but this changed with the 18F4550 device. Hardware support for a general purpose parameter stack was lacking in early series, but this greatly improved in the 18F4550, making the this device architecture more friendly to high level language compilers. Core features All of the devices in thePIC18F 455 series family incorporate a range of features that can significantly reduce power consumption during operation. Key items include: Alternate Run Modes: By clocking the controller from the Timer1 source or the internal oscillator block, power consumption during code execution can be reduced by as much as 90%. Multiple Idle Modes: The controller can also run with its CPU core disabled but the peripherals still active. In these states, power consumption can be reduced even further, to as little as 4% of normal operation requirements. On-the-Fly Mode Switching: The power managed modes are invoked by user code during o