School Anxiety Research Proposal Example | Topics and Well Written Essays - 1500 words

School Anxiety - Research Proposal Example Introduction Literature Review Bernstein (2011) defined separation anxiety as a common anxiety disorder that lasts for at least 4 weeks, among children who are 18 years old and below. This is often believed as the precursor to refuse to go to school, and affects about three fourths of children who are in school entrance age; however, this is sometimes mimicked the symptoms of school refusal. Hence, children who are identified to have refusal to go to school must also be tested for mutism (Bernstein, 2011). On the other hand, separation anxiety among children ages 3 to 4 years of age is considered as developmentally normal. During this stage, they exhibit mild distress and clinging behavior by the time they are separated from their figure of attachment such as their caregivers (Bernstein, 2011). Bernstein (2011) noted that studies have shown that a correlation about significant reading and math achievement impairment 5 – 6 years after school entrance was noted among children wh o exhibit considerable anxiety symptoms. ... Bernstein (2011) analyzed that those children have long term impairment and morbidity as well as unchanged dysfunctional interaction among parents and children at home. Bernstein added that the key to shorten the course of anxiety among school aged children, prompt treatment must be applied. Otherwise, due to intensity and chronicity of anxiety experienced by these children, 40 – 50 percent of these children or youth are at risk for being out of school and unable to graduate because of refusal to treatment. Another literature from American Academy of Child and Adolescent Psychiatry (2011) states that although young children considers going to school as an exciting and enjoyable event, some considers it as a source of intense fear and panic that parents must be concerned of. Regular minor complaints of not wanting to go to school can be a sign for children not wanting to leave their comfort zone at home. American Academy of Child and Adolescent Psychiatry (2011) noted that this saga is very difficult for parents to cope, but with the help of professional workers, these fears and behavior of being panicked and refusal to go to school can be successfully treated. Children who refused to go to school are usually children who became closer to their parents following a period of staying at home during school breaks or brief illness. However, once these children are used to in frequently being in school, they begun to calm down since their primary concern is not going to school, but rather, it is leaving their comfort zone at home (American Academy of Child and Adolescent Psychiatry, 2011). Children with persistent separation anxiety will experience serious potential long – term effects of anxiety and panic disorder when left untreated. Serious educational or

Crash Movie Review Example | Topics and Well Written Essays - 750 words

Crash - Movie Review Example From this paper it is clear that the Character of Persian delivery man is also subjected to racism due to his profession of a domestic worker. Even Cameron and Christine a well off black couple faces racism. According to â€Å"Cameron and Christine are a black well off couple. They experience stereotyping and racism when they are driving home from a party†. On the way, they were harassed by a white police officer who ran fingers on Christine’s body and Cameron felt helpless. Also Farad a Muslim shop owner in the movie faces discrimination as he is Muslim and it was a time prior to 9/11 terrorist attack.Also Graham, a black police officer with Hispanic woman called Rita tells his mom that he is with white woman which makes her angry.This study outlines that the discrimination due to class is also evident in the movie. Jean being a woman from upper class looks down upon all minorities. She looks at blacks strangely and shows offensive attitude as she walks down the street . We can see that she also acts badly to her maid servant who is black. Even with Mexican locksmith who was Hispanic she reacted in an offending manner. She blamed the locksmith for being a gang member and a potential threat. Also the shop owner Farhad who is from a working class has to live in a neighborhood with no security where his daughter was almost shot.  The movie depicts that whites are superior class and this can be evident in the scene where the white producer tells the black actor to act dumb to make him look more like a black man.... As per ( Blunt) â€Å"Because this is a movie about connections, some of the most painful moments in Crash show classism and racism supporting each other in people's personal lives†. The movie depicts that whites are superior class and this can be evident in the scene where the white producer tells the black actor to act dumb to make him look more like a black man. The movie also shows the distinction between the rich and poor class. Here in the movie, Jean and her husband are rich and afford luxurious car but poor farhad a shop owner is struggling to live in a scary neighborhood. He keeps a gun to save himself from Hispanics and blacks. Also the movie shows, the Chinese slaves who are imported to US. So in the movie there is upper class, middle class and even slaves. Gender roles are also portrayed in many scenes along the movie. In the beginning , when Jean and husband are walking on the street and when she finds two black men coming towards them, Jean hold on to her husband which shows the traditional role of male as a protector. Although he is not armed, society’s traditional view is depicted in the movie where a man is a protector and women in need of protection. Another example is where, Jean and husband in career with traditional gender role notion. Rick, the husband is an Attorney while she remains a housewife. Here, the roles reinforces male as a â€Å"breadwinner† and woman as a â€Å"domestic†. Another scene which showcases gender roles is when Cameron and Christine are stopped by the police while driving home. Here there is depiction of male versus female struggle which is much obvious in the society. The female is sexually assaulted by Ryan, a police officer while her husband watches helplessly. Although, this instance has racism, the gender

Electronic Signatures Essay Example for Free

Electronic Signatures Essay As compared to paper based signatures there is an increased dependability on electronic signatures for an increased protection of documents and patient records in healthcare facilities. Thereby this paper will discuss an importance of electronic signatures in addition to the advantages that they have in order to be implemented in healthcare, business and e-commerce. Introduction Signature is more known as a script that has been designed by an individual and is associated with that very individual. Signatures in some cases have been associated with seals used for protection. In general, signatures are an evidence of the fact that all intentions made in a certain document have been approved by the individual signing it. Purposes of signatures are the same as that of normal and usual signatures as all intentions made in an electronic document are approved by an individual who undersigns a document with an electronic signature (Brazell, 2004, p. 23). Many definitions have been given in relation to the electronic signature. All in all these definitions highlight the fact that as compared to hand written signatures, electronic signatures are more protective and sealed thereby there is an increased reliability associated with electronic signatures. Defining Electronic Signatures First definition that needs a mention here is given by US Code. It defines an electronic signature as an electronic sound, or a symbol that represents documents in a unique way as these symbols are associated with these documents in a legal manner. According to this definition symbols are adopted and chosen by an individual who wishes to sign, seal and protect a document thereby making sure that all intentions are accepted by that very individual. The US code argues that the signatures can be embedded in transmissions of electronic documents observed during transmission of facsimiles. The electronic signature can also take the form of Morse code in case of electronic message transmission as the signs are embedded inside the message. Realizing an importance of the protective and sealing protection offered by electronic signatures, there is an increased use of encrypted electronic messages in fields that are more sensitive about integrity of documents thereby e-commerce, healthcare, government office are observed to frequently adopt the technology of electronic signatures (Schellekens, 2004, p. 56). Legal standing of these electronic signatures has been well established thereby the laws of EU and US recognize electronic signatures holding the same legal importance as ordinary signatures on documents. Legal issues and consequences that are associated with electronic signatures are same as normal and usual signatures. Historical Perspective of Electronic Signatures Electronic signatures have been known to exist since before the American Civil War. Electronic signatures date back to 1860s when electronically encrypted messages were being used by the help of Morse codes in telegraphy. Telegraphy in those days was used to send messages that were more secret and in agreements to terms that were presented in certain kinds of enforceable contracts. Legal standing of these electronic messages dates back to 1869 when an importance of these telegraphically encrypted documents was enforced by the New Hampshire Supreme Court (United Nations Commission on International Trade Law, 2002, p. 78). In order to ensure protection, and time sensitive delivery of protected documents to safer places, in 1980s, many organizations started working on electronic signatures in order to encrypt documents. For encrypting highly sensitive documents, fax machines were used. Nevertheless in this case it has been seen that although original signatures used to be on the paper, but images of signatures and transmission used to be in an electronic format thereby ensuring increased protection. Recently it has been seen that various legal interventions have been made in order to enhance protection offered by electronic signatures. It has been added by the US courts that documents that can be protected and sealed by electronic signatures can include emails, PIN codes that are used for ATM transactions in banks, credit or debit sllip that needs to be protected by signing it with a digital pen pad device, installing kinds of software that comes with a clickwrap software license agreement along with documents that are often signed online that need enhanced protection. It has been recorded that the first document signed in an electronic way was between two sovereign nations, United States and Ireland in a communique that jointly recognized an importance of electronic signatures in trading and e-commerce (Katsikas, Lopez, and Pernul, 2005, p. 78). Enforcing Electronic Signatures United States has defined electronic signatures in legal ways and a set of requirements have been set that help in qualifying an electronic signatures as authentic. These requirements and qualifications of electronic signatures were designed by National Conference of Commissioners on Uniform State Laws (NCCUSL) in 1999 when this US based government organization released Uniform Electronic Transactions Act (UETA). UETA has defined electronic signatures as electronic symbols that are associated with a certain document in relation to which all intention have been accepted by the individual who owns and signs the particular document. There are many laws that echo core concepts of electronic signatures and these are also observed to be the same in U. S. ESign Act that was presented and implemented in the year of 2000. Many states in United States have been working on the laws and jurisdiction in relation to the electronic signatures and more than 47 states in United States along with the District of Columbia, and the US Virgin Islands have enacted and have been using UETA in an active manner. Only three states as New York, Illinois and Washington have not enacted UETA. New York has designed its own rule that recognizes electronic signatures as legal and the law that represents these signatures is Electronic Signatures and Records Act (ESRA) (Boss, and Kilian, 2008, p. 67). Other countries that have started assigning legal values to electronic signatures include Canada. The definition of electronic signatures given by Canadian legal authorities is generic and different from the one given by the US authorities. Generic definition of signature given by the Canadian Department Of Justice says that an electronic signature contains a chain of letters, symbols, and numbers encrypted in a digital format associated with a certain electronic document that belongs to an individual or a certain organization (Snijders, and Weatherill, 2003, p. 45). After this Canadian Department Of Justice has defined an electronic signature by arguing that electronic signature in contrast to normal signatures possess some distinct properties that define these signatures. Canadian law that talks about the digital signatures in accordance to the protection of electronic documents is PIPEDA. PIPEDAs secure electronic signature regulations argue that electronic signatures are those that are designed, applied and verified in a specific manner. European Union has also given its rules and regulations in accordance to the use of electronic signatures in document protection systems. These laws have been published in the EC Official Journal. These laws are referred to as the Directive 1999/93/EC of the European Parliament and of the Council while officially these are more often referred as the EU Directive on Electronic Signatures or the EU Electronic Signatures Directive. These were published on 13th December 1999 (Adams, and Lloyd, 2003, p. 78). Maintaining Legal Nature of Electronic Signatures Various laws and jurisdictions have been defined that help e-commerce and trade to incorporate the advantages of electronic signatures in daily business deals that can help in increased document protection. It has been realized that at a local and an international level there is a need to incorporate certain document protection systems that can help in easy working and trustworthy document sharing within different parties. 1. Definitions of PIPEDA (Personal Information Protection and Electronic Documents Act) An electronic signature can be defined as being safe when a. It is unique to an individual b. Technology that is being used in order to generate signatures are under the control and only being used by the person who creates the signature thereby adding to the level of uniqueness. c. The technology being used to create signatures should be able to represent an individual who has created the signatures. d. The electronic signatures are to be linked with an electronic document in various ways. One way that has been defined by Personal Information Protection and Electronic Documents Act argues that the electronic document should be able to identify, by the help of electronic signatures associated with it, if any changes have been made to this document after signatures were associated with the document originally (Kehal, and Singh, 2005, p. 78). 2. The Electronic Signatures in Global and National Commerce Act This law was passed by the US congress in relation to the electronic signatures and this law has defined and authorized the electronic signatures in three steps. a. The term ‘electronic’ in electronic signatures has been highlighted as something that possesses digital, symbolic, magnetic, wireless, electromagnetic, electric properties. b. Electronic record on the other hand has been defined as a document, contract that has been generated, created, shared, discussed, and sent by using electronic means. c. Electronic signatures have been defined by The Electronic Signatures in Global and National Commerce Act as an electronic sound, symbol or a process that is legally and authoritatively associated with a document created by an individual holding rights to create, sign and decrypt the document in any manner thereby ‘patenting’ the document (Pathak, 2007, p. 34). Other similar definitions have been given by the following acts that relate to the use of electronic signatures. a. Government Paperwork Elimination Act, US b. Federal Reserve 12 CFR 202 c. UETA d. Commodity Futures Trading Commission 17 CFR Part 1 Sec. 1. 3. Creation of Electronic Signatures: Public Key Infrastructures (PKI) Importance of electronic signatures has been realized since long as it has been seen that these are more important in protecting the legal status of documents in a comparative manner. Thereby secure and much complex ways have been identified that can define electronic signatures in ways that ensure their legal status in order to protect records. Creation of electronic signatures depends on asymmetrical cryptographic method. This method ensures that the kinds of protection status being encrypted in the document are only approachable by the person who creates the signatures on the document. Thereby two kinds of keys are used in this case and these are referred to as public and private cryptographic keys. The theoretical fundamentals and practicalities of the asymmetric cryptographic key were laid down in 1976 (Doukidis, Mylonopoulos, and Pouloudi, 2004, p. 79). In accordance to the theory and recent ways that have been developed for electronically signing a document, a number is calculated that represents the length of a document and this number is referred to as the checksum of a particular document. This checksum is calculated by using a hash function. This is the case where a private key is used which is more representative of the person signing the document. Thereby signature is represented by private key which in the end is attached to a document. This private key is thereby a signature of the document. Role of Public Key Another key that plays an important role in this case is a public key. An important that is played by a public key is that the signature’s and relevant document can be checked by the public key. Public key as the name indicates is freely and easily available to any individual within the public. Decryption of the electronic key is performed by the help of an electronic signature. Integrity Check An integrity check is an important part of electronic signature allocation. It has been seen that integrity of a document can be checked by recalculating the checksum number that was allocated to the document originally. As was done during the calculation of checksum, the recalculation of checksum is also done with the help of hash functions. Integrity of the document can be validated if the checksums are identical ensuring that the integrity of the document is intact (Rice, and American Bar Association, Section of Litigation, 2005, p. 78). Role of Certificates Public keys and cryptographic keys are the most important part of the electronic signature creation thereby there is a need of a system that can authorize the genuine nature of these keys. Both of these keys are authorized by a certificate. Certificates are specially created electronic documents that associate and connect the public key with the key holder’s identification data that in this case has to be unique. On the other hand in order to provide increased protection it has been observed that to ensure increased protection, certificates are also electronically signed by the certification providers that are also authorized. All these links and methodologies designed to sign the documents make sure that document is signed, encrypted and decrypted by using the public key only by the person who has created the document. Certification service providers play important roles as Trusted Third Party offering services other than certificates for protection of electronic documents. Certification service providers are known to provide a set of directory services that are also related to electronic documents. These are the services that bring the protection provided by the electronic signatures a step ahead. Directory services provide additional measures by which the certificates can be checked for authentication time by time. Advantages of Electronic Signatures These days there is a need to exchange business in a fast manner that requires and demands exchange of information including documents in a secure manner. It has been realized that exchanging information on a regular basis is more secure in an electronic manner rather on paper. 1. Electronic information takes lesser time to travel as compared to the paper based information thereby there is no time wasted (Mann, Eckert, and Knight, 2000, p. 67). 2. The cost of electronic signature based documents is only needed in the beginning of this setup and there are no additional costs required after its implementation. 3. Because of the electronic nature of documents, there is lesser involvement of human beings other than the ones that are directly involved ensuring security in case of these documents. 4. Because of an electronic nature of these documents there is a lesser chance of interruption and interference in electronic documents that increasingly ensures the protection of these documents. In terms of protection it has been observed that electronic signature based documents are more secure and protected as compared to paper based signatures. 1. In this case it has been argued that the electronic signatures are not able to be copied as compared to the normal paper based signatures and electronic signatures are implemented on the complete document rather than the last page. 2. In this case it has been observed that as electronic signatures are implemented on whole document thereby there are no chances of any text being maliciously changed in any part of the document. 3. Time stamping is the proof of transmission time of the document thereby transmission dates can be cross checked in order to check the legal status of the document. 4. Additional restrictions can be imposed on the message content in electronically signed documents. It has been observed that with the consent of the document holder and creator, reader can read and verify the contents of the document (Katsikas, Lopez, and Pernul, 2005, p. 45). Other than these, additional advantages that are offered by the electronically signed documents include streamlining businesses and trade globally and on a local scale. Business chains are better connected when paper documents are removed having a much better control on business with the help of electronic documents. 1. Increased cost are associated with typing documents and sending these through courier and these costs are reduced in case of electronic documents that take lesser time to be emailed and fixed. 2. In case of signing the contracts an important issue used to deal with signing the contracts which is resolved by electronic signature based reinforce bale contracts that are signed anywhere. Electronic Signatures Usage in Medial Healthcare Records Healthcare in the modern days is recognized by an increase in the specialization of medical specialization. In order to ensure that patient care process is optimized there is an increased cooperation and data exchange between different healthcare institutions. Thereby it has been observed that in order to ensure timely, cost effective and economic patient care, often known as shared care, there is a need to increasingly exchange information with healthcare institutions and medical facilities. The kinds of patient record systems that are adopted these days are increasingly dependent upon the data exchange. On the other hand it has been realized that there are many shortcomings associated with paper based documents that have been also held responsible for a decreased efficiency of healthcare institutions, thereby there is an increased adoption of electronic signatures on the documents (Boss, and Kilian, 2008, p. 38). In order to ensure that all heath care operations undergo in a proper, streamlined and a secure manner there is a need to implement the technology of electronic signatures to the field of healthcare. Paper based signatures are time consuming and are less protecting as compared to electronic signatures thereby in the field of healthcare, document authenticity is a critical business operation. There is a set of documents that are in a need to be protected in face of infringements and these documents include patient records, physician diagnosis, order, bills and payments. Thereby based on the set of advantages that have been highlighted in the previous sections healthcare facilities in different countries have started to implement electronic signatures. Recently there are many changes in United States health departments in order to implement electronic signatures based documents. It has been recently reported that regulations have been passed and implemented by the Drug Enforcement Agency in order to implement electronic signatures on medical prescriptions that are of electronic nature in order to ensure that original prescriptions are checked on the counters of pharmacies rather than cooked ones. Another law that has been passed by the Veteran’s Health Administration relates to the consent forms that are signed by the patients. In order to protect these forms, protection is being ensured by the implementation of electronic signatures on these forms. In healthcare administration various standards have been defined that link important records and documents with encrypted signatures. Recently a standard has been defined that helps in an authentication of medical records of the patients, an ASTM standard. In order to electronically sign the radiological images, DICOM standard have been used and are in practice. Most of the documents in medical centers and healthcare institutions are related to signatures, including signatures from families, patients and physicians. Thereby after the creation of these documents it is important that these documents are protected and sealed by the help of electronic signatures. Successes of document security solution lies in the fact of creating documents that are electronically signed thereby are digitally protected. These protection measures have also been considered important in the case of offline and online business, e-commerce (Adams, and Lloyd, 2003, p. 24). Conclusion Internationally accepted standards have been defined that can help in securing the documents in a better manner. In case of healthcare it has been seen that there is an increased dependency on a long term archiving of patient records as soon as these are created and passed on to the other facilities. International standards have been used to define the signatures in accordance to the advantages that they ensure, as DICOM, XML, and HL7. In addition to this it has been argued that there is an increased integration of PKIs in healthcare services as these are designed in accordance to the legislations that have been designed in order to ensure document protection. References Adams, C. , and Lloyd, S. (2003). Understanding PKI: concepts, standards, and deployment; considerations, Technology series. Edition 2. Addison-Wesley. Boss, H. A. , and Kilian, W. (2008). The United Nations Convention on the Use of Electronic Communications in International Contracts. Kluwer Law International. Brazell, L. (2004). Electronic signatures law and regulation. Sweet Maxwell. Doukidis, I. G. , Mylonopoulos, N. , and Pouloudi, N. (2004). Social and economic transformation in the digital era. Idea Group Inc (IGI). Katsikas, K. S. , Lopez, J. ,and Pernul, G. (2005). Trust, privacy, and security in digital business: second international conference, TrustBus 2005, Copenhagen, Denmark, August 22-26, 2005:proceedings, Lecture notes in computer science, Springer eBook collection. Birkhauser. Kehal, S. H. , and Singh, P. V. (2005). Digital economy: impacts, influences, and challenges. Idea Group Inc (IGI). Mann, L. C. , Eckert, E. S. , and Knight, C. S. (2000). Global electronic commerce: a policy primer. Peterson Institute. Pathak. (2007). Legal Aspects Of Business. Edition 3. Tata McGraw-Hill. Rice, R. P. , and American Bar Association. Section of Litigation. (2005). Electronic evidence: law and practice. American Bar Association. Schellekens, M. (2004). Electronic signatures: authentication technology fro

The Age Of Refrigeration Environmental Sciences Essay

The Age Of Refrigeration Environmental Sciences Essay The ozone depletion potential is the ability of gases to degrade ozone if released into the atmosphere, and is compared against the value for CFC-11 (CCl3F), which was chosen to be 1. The halocarbon global warming potential, or greenhouse warming potential of a gas, is a calculation of how strongly the release of a certain quantity of that gas would contribute to global warming, via the greenhouse effect. Once again, it is compared against the value for CFC-11 (CCl3F), which has the value of 1. HFC-134a (1, 1, 1, 2-tetrafluroethane, CF3CH2F), a widely used refrigerant, is more environmentally suitable than many other possible refrigerants. Firstly, its ozone depletion potential (ODP) is completely nonexistent, meaning that the release of HFC-134a into the atmosphere would not damage any more of the ozone layer. This is superior to many other proposed replacements to CFC-11, which often feature greatly lowered ODP, rather than zero ODP. HFC-134a also has a reduced halocarbon global warming potential (HGWP) of 0.25, a quarter of CFC-11s value. HFC-134a is not the lowest in this value, however. Some other possible refrigerants, such as ammonia and iso-butane (C4H10) have incredibly low, almost non-existent HGWP values. However, both of these gases (especially ammonia) can be considered toxic to humans, and both are flammable, leaving them liable to explosion from a spark if they were to leak from a refrigeration unit. Because of this, HFC-134a is therefore a more suitable modern refrigerant for domestic use. (Website 1) Q1ii) CCl2=CHCl, or trichloroethylene, can be converted to HFC-134a (also called R-134a) by carrying out several reactions in sequence. In the first part of the reaction, CCl2=CHCl is reacted with hydrogen fluoride (HF) to produce CCl2F CH2Cl. In the second part of the reaction, the CCl2F CH2Cl is reacted with 2HF to form CF3 CH2Cl, and then with another HF to created the HFC-134a (CF3=CH2F). This whole reaction process is shown in full below In order for HFC-134as usage to become widespread, its conversion from trichloroethene through industrial means needed not only to be feasible, but both cost and time effective as well. Firstly, the reaction process takes place within two separate chambers. One of the chambers is where the reaction products can be separated, allowing the HFC-134a to be isolated from dangerous, or otherwise unwanted products. The other chamber deals with recycling the trichloroethylene (CCl2=CHCl) and hydrogen fluoride (HF) used within the reaction, so they can be reused within subsequent reactions. This helps to make the HFC-134a conversion process more cost effective. A fluorination catalyst is also used in the reaction process, helping to make the conversion more feasible and time efficient. The conversion process also takes place at high temperatures (up to 400oC) and at super-atmospheric pressure to further ensure that it operates both cost and time effectively. (Website 1) Q2i) According to the research published in the article Regulating To Reduce Emissions Of Fluorinated Greenhouse Gases from the Journal of fluorine chemistry, the chemical compounds which contribute the most to global warming are, in order: carbon dioxide (CO2), methane (CH4), Nitrous Oxide (N2O), the ozone depleting substances (CFCs HCFCs), and then the fluorinated greenhouse gases, namely hydrofluorocarbons (HFCs), perfluorocarbons (PFCs), and Sulfur hexafluoride (SF6) Carbon dioxide (CO2), the gas most contributive to global warming, is a small atmospheric molecule that is a key component of our atmosphere as it is used in the carbon cycle of plants. Of all of the contributing gases, CO2 has the lowest global warming potential (GWP). However, due to the incredibly high production and release of the gas into the atmosphere, CO2 is still the leading cause of global warming. Methane (CH4) is another simple chemical structure, and is the main component of natural gas. Like CO2 it has a relatively low GWP, but is a major contributing factor to global warming due the large amounts of the gas released into the atmosphere. Nitrous Oxide (N2O) is an oxide of nitrogen, more commonly called laughing gas that is used for both anaesthesia and for its oxidizing effects. N2Os GWP is higher than methane and carbon dioxide, but its level of emissions is also much lower The ozone depleting substances, namely HCFCs CFCs, were incredibly common in the early days of domestic refrigeration, as they were non flammable, non toxic and inexpensive. They were quickly phased out from general use, however, when it was discovered that they had an extremely detrimental impact on the ozone layer. They also contribute to global warming, and though they were largely replaced by the use of other gases such as HCFs, they still contribute significantly to global warming. Hydrofluorocarbons (HFCs) are chemically similar to CFCs, but do not share their ozone destroying effects. As a result of this similarity and due to the inert nature of HFCs (non-flammable non-toxic in almost all cases) they are widely used as replacements for CFCs in a variety of domestic appliances and products. However, HFCs feature considerable global warming potentials (GWPs), making them a key contributor to global warming. Compound Compound Emissions (million tonnes) Global Warming Potential (100 year vs. CO2) GWP emissions (million tonnes CO2e) Percentage contribution to global warming (%) Carbon Dioxide (CO2) 30800.00 1 30800 65.4 Methane (CH4) 350.00 21 7350 15.6 Nitrous Oxide (N2O) 11.00 310 3410 7.2 Ozone Depleting Substances (CFCs HCFCs) 0.60 8100 4860 10.3 Hydrofluorocarbons (HFCs) 0.14 2800 392 0.8 Perfluorocarbons (PFCs) 0.02 6500 130 0.3 Sulfur hexafluoride (SF6) 0.01 23900 143 0.3 Perfluorocarbons (PFCs), hydrocarbon derivatives, are another set of environmentally damaging compounds, especially when they are saturated and within the C1-C6 range. They are useful compounds in the electronics industry, though it is an aim that their usage is kept to the absolute minimum and only when no other compound would perform the desired function in their place. Like HFCs, they have a lower level of emissions, but a high GWP Sulfur hexafluoride (SF6) is a technically diverse gas, useful for a diverse range of applications, but most commonly used as a dielectric gas in situations involving high voltages because of its dielectric strength and constant, its properties for arc (spark gap)-quenching and its suitability for use in transferring heat. Its level of emissions may be the lowest of all contributing gases, but its GWP is by far the highest. (Lindley, 2005) Emission values for these key compounds, and their percentage contributions to global warming, are shown in the table below. Table 1: Greenhouse gas emissions in the year 2000 [Adapted from table 1 (Lindley, 2005)] The relative dangers of certain molecules, in regards to global warming, can also be assessed via radiative forcing. Radiative forcing is the effects of the heat energy produced by solar rays being held within the atmosphere (most crucially between the lowest part of the atmosphere [troposphere] and the stratosphere) of earth, rather than escaping out into space. This effect is made worse by the over abundance of certain gases in this section of the atmosphere. Therefore, measuring the radiative forcing effects of certain gases can, in turn, help work out how much of an effect that molecule is having on global warming. A figure, showing the extent of radiative forcing effects for different gases is shown. Figure 1 (right): estimated radiative forcing effects of key gases from 1990-2015 [Figure 1 from (Lindley, 2005)] It is clear from the results shown that in order for the effects of global warming to be lessened, reduction in the emissions of these key contributing compounds would need to be carried out. Most crucially, the emissions of CO2 would need to be lessened, as it has the highest percentage contribution to global warming, as well as the largest radiative forcing value. The radiative forcing values for ozone depleting substances are also very large, but as these are being phased out and replaced by the fluorinated greenhouse gases (HFCs, PFCs. SF6), they are less of a concern. (Lindley, 2005) Q2ii) F-Gas regulation is a proposal designed to keep the usage of hydrofluorocarbons and perfluorocarbons under stricter control, so that their emission levels do not contribute any more significantly to global warming. This will be achieved through a variety of means, including: improved containment of gases, reduced and restricted gas usage and putting requirements on how these gases are destroyed. In some cases, a ban may even be placed on a certain gas, preventing it from being used for specific functions. Furthermore businesses that use produce or sell f-gases are required to disclose what quantities of F-gas they are using, creating and supplying respectively. In addition to this, those involved with F-gases will be trained on how to safely handle the gases and prevent any unnecessary leaks, and any significant use of F-gases must be labelled as such. These measures all serve the purpose of limiting the amount of fluorinated greenhouse gases that are leaked into the atmosphere, keep ing the percentage contribution of fluorinated greenhouse gases to global warming as low as possible. (Lindley, 2005) In accordance with these regulations, industrial refrigeration systems are now to be inspected on a regular basis. Details on these new procedures is found in the table below Table 2: Inspection schedules for refrigeration units of different capacities [Adapted from table 2 (Lindley, 2005)] Quantity of F-Gas in Refrigeration System Inspection Frequency (With No Leak Detection) Inspection frequency (With Leak Detection) Containing up to 30 kg (excluding airtight systems which contain less than 6kg) Once every 12 months Installation not required Containing up to 300kg Once every 6 months Installation not required (Presence of install halves inspection frequency) Containing more than 300kg Once every 3 months Installation mandatory (Presence of install halves inspection frequency) [Note: In the event of a leak, the system must undergo reinspection 1 month after the leak has been fixed] Also, the F-gas regulation stipulates that certain refrigeration applications must be banned completely. Details on those affected applications are shown in the table below. Table 3: Banned refrigeration applicants under F-gas regulation [Adapted from table 3 (Lindley, 2005)] Type of Gas Prohibited Usage Date of prohibition Fluorinated greenhouse gases Non-refillable containers Start of F-Gas Regulations Fluorinated greenhouse gases Windows for domestic use Start of F-Gas Regulations Fluorinated greenhouse gases Other windows One year after the Start of F-Gas Regulations Fluorinated greenhouse gases Footwear 1 July 2006 Fluorinated greenhouse gases Tyres Start of F-Gas Regulations Fluorinated greenhouse gases One component foams One year after the Start of F-Gas Regulations (except when required to meet national safety standards Hydrofluorocarbons and perfluorocarbons Refrigerants in non-confined direct-evaporation systems Start of F-Gas Regulations Perfluorocarbons Fire protection systems and fire extinguishers Start of F-Gas Regulations Hydrofluorocarbons Novelty aerosols Two years after the Start of F-Gas Regulations Q2iii) F-Gas regulations put restrictions on the many uses of fluorinated gases. One such restriction is that of HFC-134a in mobile air-conditioning units, such as those used in cars. The popularity of air-conditioning in cars has been rising steadily since the early 1990s, such that now over 80% of cars in Europe have this feature installed. While the HFC-134a system is much more efficient than the earlier CFC systems, using less than half of the 1.5kgs of gas that they used, and further research was being carried out in order to make more efficient systems, the EU has still decided to prohibit their future usage, having the use of the gas gradually phased out until 2017 when its usage is completely banned. This will have a considerable effect on the HFC134a industry as its usage in cars and other similar transport makes up a considerable part of their market. In turn, car manufacturers will have to develop new air-conditioning systems in cars, and this will drive up the cost of newer car models to counter development costs. (Lindley, 2005) 3) Ever since the realisation of mankinds negative impact on the environment, preventative measures have been put in place to try and reverse them, and several different pieces of legislation help to ensure that this is the case. The Montreal protocol, which banned the usage of CFCs and HCFCs, was created to help protect the ozone layer from further harm. In this regard, the protocol can be considered a success. Levels of ozone damaging gases in the atmosphere have been steadily falling, and it is estimated that the ozone layer could have repaired itself as early as 2050 (WMO, 2006). However, the replacement of CFCs and HCFCs with fluorinate gases to combat the destruction of the ozone layer lead to more environmental concerns, namely that these fluorinated greenhouse gases were making a significant impact on global warming. While the impact of these gases on global warming may be less than that of some other greenhouse gases (namely CO2) their effects are still considerable, and several pieces of legislation have been set up to try and decrease their usage. Firstly, the Kyoto protocol listed several fluorinated greenhouse gases, including HFCs, PFCs and SF6, along with CO2, CH4 and N2O, as gases that must have their levels of emissions decreased. The F-Gas regulation, making reference to the Kyoto protocol, set regulations on the usage of the HFCs and PFCs, helping to reduce their prevalence in society. Despite this, global warming problems continue to rise, thanks to increasing atmospheric levels of CO2. As long as CO2 is so prevalent in the atmosphere, reducin g the effects of comparatively less harmful fluorinated gases through legislation can only do so much in helping to combat the rising problems of global warming (Lindley, 2005 Website 2)

Baja Taco :: essays research papers

â€Å"Baja Fresh & Taco Bell† In today’s increasingly competitive marketplace businesses must be very creative in their marketing strategies in order to attract as much business possible. Companies spend a tremendous amount of their budget on advertising, soliciting, marketing and selling their products and / or services. Businesses that aren’t creative don’t appear to succeed as much as those that produce good marketing campaigns. Fast food restaurants are one of the most recognized businesses. It appears that at just about every major intersection you’ll find some sort of fast food establishment. Which one do you select? Why did you select it? Is their food good? Was it because you found their marketing approach â€Å"funny†? Are your funds limited? There are multitudes of reasons why consumers solicit a particular business. I analyzed two fast food restaurants; one is an established major fast food provider, Taco Bell, the other restaurant is also a fast food provider, however, relatively new in the industry, Baja Fresh. Taco Bell has literally become a household product throughout much America. The marketing campaign Taco Bell initiate states that half of the American population sees a Taco Bell commercial at least once a week. Their most recent marketing slogan is a talking Chihuahua that speaks Spanish. One of his more well known punch lines is â€Å"Yo quiero Taco Bell!† Taco Bell restaurants serve Mexican fast food. They are the largest Mexican fast food restaurant chain in America. Taco Bell does not consider itself to be fast food, they consider themselves to be quick-serve Mexican style restaurants. Taco Bell focuses a great amount of their marketing strategies towards the younger age group. They are usually marketing their products around â€Å"blockbuster† movies or popular action figures, and will usually offer some sort of marketing token with many of their meals. The food at Taco Bell is priced relatively inexpensive; however, the quality is typical of a fast food restaurant; you get what you pay for. Taco Bell is constantly producing new food items in order to attract more customers. Competition is strong and dynamic in most markets. So it is essential for a firm to keep developing new products-as well as modifying its current products-to meet changing customers needs and competitors’ actions (Perreault, 281). Taco Bell continually is experimenting with new food product lines. Taco Bell is a part of the Tricon Global Restaurants Group; one of the largest restaurant chains in the world.

social security Essay example -- essays research papers fc

In reading the book â€Å"Social Security and the Family† I learned a lot about the system that I had no idea about before. The book was fact filled and almost fun to read the need to know information. I gained much knowledge in the specifics of why the social security system is in need of reform, and why it will be inadequate in the years to come. One of the reasons our social security system isn’t working is because, â€Å"Social Security was modeled on the single-earner, married-couple family† (1). Times have changed dramatically since then.   Ã‚  Ã‚  Ã‚  Ã‚  When assessing the issues and current structure of the security system for change, â€Å"Four elements characterize the objectives of most tax expenditure programs, including Social Security† (179). A few of these issues are related to recent subjects addressed in class.   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  The first discussed is Income adequacy,† or the extent to which the program distributes more resources to those who are worse off than to those who are better off, typically measured by annual income. One important measure of the programs success in meeting this objective is its antipoverty effectiveness† (179). Since poverty is one of the main reasons for reform, this is a good issue to have been discussed.   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  The second is individual equity, â€Å"based on the idea that individuals should get what they pay for† (181). The problem with this issue is that many people are not getting back all they deserve.   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  The third discussed as in class is horizontal equity, â€Å"or the equal treatment of individuals in equal circumstances† (181). The idea behind horizontal equity is to give families with about the same earning... ...nts' card games to repeat the promise. He has brought along his mother, Barbara Bush, to show he understands older people's concerns† (NYT). This is just one of the many problems we face in trying to fix the system for now and in the long run for when its time for the younger generations to retire. Social Security and the Family† is a very well written book in addressing the under-funded System and other unmet needs. Being edited by three individuals who are Mellissa M. Favreault, Frank J. Sammartino, and C. Eugene Steuerle gives the reader three times the information about the system. The Setup and way the book flowed kept you reading through the ideas with ease. I would recommend this book to anyone and everyone because that is who the Social Security System affects. Works Cited New York Times. The New York Times Company. 2005   Ã‚  Ã‚  Ã‚  Ã‚  Anne E. Kornblut. â€Å"Bush Opens Door to Changes in his Plan†   Ã‚  Ã‚  Ã‚  Ã‚  March 23, 2005. http://www.nytimes.com/2005/03/23/politics/ 23social.html Melissa M. Favreault, Frank J. Sammartino, C.Eugene Steuerle, editors.   Ã‚  Ã‚  Ã‚  Ã‚  Social Security and the Family. The Urban Institute Press. 2002

Eternal Recurrence by Nietzsche

The theory of Eternal Recurrence, which is also referred as Eternal Return, states that the world has been returning or recurring. This implies that whatever realities our world has in this particular times would be repeated indefinitely yet unknown to all in the same manner that they are represented to the world at this moment (Lowith). According to historical records, the concept or idea of eternal recurrence originated from the ancient Egypt and was later on adapted by the Stoics and Pythagoras. Nevertheless, this principle had been abandoned through the rise of Christianity (Lukacher). It was only when Friedrich Nietzsche reintroduce the thought the scholars began to evaluate its truthfulness or possibilities. The fundamental argument of this theory is that the world is confined in scope and fixed, predetermined or restricted quantity of substances. While matter is considered limited, time exceeds it by being immeasurable and never-ending. The world does not possess staring point or end point whereas matter, that which comprise the world, is consistent in undergoing various changes in terms of its state (Lowith). Moreover, the theory suggests that the number of probable changes that the matter could have is limited and is fixed thus arriving at an assumption that sooner or later the similar state will happen again. The concept of eternal recurrence is fundamental and imperative throughout the works of Nietzsche. According to another philosopher in the name of Martin Heidegger, Nietzsche, though advocating the theory of eternal recurrence, did not really argue that such phenomenon has existed or is existent. But what is true on Nietzsche’s philosophy is that he accepts and does not deny the idea of eternal recurrence or eternal return. As Heidegger furthered, Nietzsche regarded the theory or the concept as merely a simple assumption just like how the Christian faith admits the idea of Hell and Angels. The idea of eternal recurrence is manifested through Nietzsche’s published works such as Thus Spoke Zarathustra and The Gay Science (Heidegger). But Nietzsche succeeded presenting his full conception on the thought of eternal recurrence on the foremost book. In this writing, the protagonist Zarathustra discovers himself on a mountain and faces two opposite paths. Together with the dwarf they try to work out on the dilemma of the two opposite but eternal paths. Zarathustra asks the dwarf if is it possible that someone has already passed the path yet continues to pass through path in unfathomable times. As he sees the gate, he concludes that it could be the case that everything that is happening in this world have already happened in the past, and is happening in the present time, and would eventually repeat to happen in the future since neither of the paths suggests a beginning nor an end (as both paths are eternal). This spectacle motivated Nietzsche to work on the possibility of eternal recurrence or eternal return. Basically, Nietzsche’s idea of eternal recurrence is simply a hypothesis of what he introduced in his work. No one would really know or confirm if particular things or event shad already happened in the past and just recurring. Hence, it could not really produce or offer concrete or sufficient evidence to say that at some point or truly eternal recurrence exists. In a way, eternal recurrence has some semblance or similarity with the idea of reincarnation (Lukacher). However, in reincarnation, it is not the matter that recurs but the only the soul. Thus, eternal recurrence could not be termed as equivalent of reincarnation. Comparable to what Nietzsche argues about the eternal recurrence principle, Arthur Schopenhauer also has his own idea of eternal recurrence the same way as Nietzsche’s. However, in his idea, the only thing that recurs is the matter in such a way that entities return in their own bodies and not in other bodies as how the tradition of reincarnation suggests (Lowith). It is noteworthy that Schopenhauer does not include time but merely explaining eternal recurrence as a physical concept. The same thing as Henry Poincare suggests in his proof to support the eternal recurrence through Mathematics (known as the Poincare’s Recurrence Theorem). It argues that if a system has a finite level of energy and remains at a finite spatial amount, after a considerable length of time, a system would return to its original state (Lowith). As an analysis of Nietzsche’s theory or concept of eternal recurrence, it is obvious that Nietzsche did not demand absolute truth to his principle for the fact that he did not imply all throughout his discussions and philosophy on the concept of eternal recurrence that it really exists in reality. In effect, he maintained analyzing and reflecting on the concept as simple a hypothesis, a conjecture, a presupposition. Furthermore, it could be the case that Nietzsche understood that there is no way that he could prove his hypothesis for the reason that there would be no entity that would demonstrate the very principle of eternal recurrence. No person would claim that his life and his being recur the same way as they did before. Works Cited Heidegger, Martin. Nietzsche: The Eternal Recurrence of the Same. HarperCollins, 1985. Lowith, Karl. Nietzsche's Philosophy of the Eternal Recurrence of the Same. First ed.  Ã‚  Ã‚   University of California Press, 1997. Lukacher, Ned. Time-Fetishes: The Secret History of Eternal Recurrence. Duke University  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   Press, 1998.