Understanding and overcoming Database Design conflicts Research Paper

Understanding and overcoming Database Design conflicts - Research Paper Example Understanding and overcoming Database Design conflicts People think database design is a simple topic, but in actual fact it is a very complicated subject. In view of the fact that a correctly planned database arrangement is a design of a company, or a number of "things" in the actual world. Thus, similar to their physical model equivalents, data models facilitate them to obtain responses concerning the information that structure the objects being formed. In addition, queries that require answers decide that which details require being stored competently in the data model. In a relational database data is stored in different tables in place of placing all data in one large table. Moreover, in the relational model, data is typically arranged in tables that encompass the attributes that each record has the similar number of information; each field holds the similar type of particulars in every record; there is simply single entry for every fact; two records cannot hold the similar data; the sequence of the records as well as fields is not significant. In fulfilling database design objectives we can face a lot of conflicts and issues. The basic aim of this paper is to assess these conflicts and issues and afterward suggest several mitigation policies for such issues. This research will mainly analyze three types of goals which can be conflicting to one another and impossible for all companies to solve all three. Database Design Background An accurately designed database offers the users means of access to the latest, correct data and information. For the reason that an accurate design is necessary in attaining an organization’s objectives in functioning with a database, spending the time necessary to proficiently discover the standards of high-quality design seems sensible. Finally, we are a great deal more promising to finish up with a database that convenes our requirements as well as is able to simply hold changes or modifications in data. Moreover, in database design process, system developers judge a lot of issues all t hrough the design stage, for instance, how to produce an user-friendly interface, how to effectively normalize the data, and various other issues. However, without an uncertainty, one of the database developer's most significant objectives is to assure the correctness of the data (Microsoft Corporation., 2011), (Cgarvey, 2003) and (Hoffer, Prescott, & McFadden, 2007). Technical Description Need of Accuracy for Database Design Correct design is vital to the functions of a dependable and well-organized information structure of a business. At the present the technology of microcomputer is so sophisticated that the influence of a meager design can not humiliate as early as in the past; though, while the issues come into view they could be rather harsh. The blueprint of a database has to perform by means of the technique data is stored as well as how that data is connected. In addition, the design procedure is carried out besides user decides precisely what information should be stored a s well as how it should be taken back. Moreover, the more cautiously we design, the improved the physical database convenes users' requirements.

History and Development of Air-conditioning Research Paper

History and Development of Air-conditioning - Research Paper Example A close ancestor to the modern air conditioner units made in 1902, by an American engineer by the name of Willis Carrier. The machine at that time called "Apparatus for Treating Air" and built for the Sackett-Wilhelms Lithographing and Publishing Co. in Brooklyn, New York. Chilled coils used in machines to reduce air and lower humidity to 55%. Although the apparatus made with enough precision that the humidity level desired was adjustable. ("History of Air Conditioning") The article explains how air conditioners started becoming a commercial product as it became increasingly in use for industrial purposes. The real breakthrough achieved when Carrier had the benign dielene together with a central compressor replacing the ammonia thus reducing the size of the unit. Willis Carrier's invention came late in the 1900s, but before that, several attempts to air conditioning existed. In 180 AD, Ding Huan discovered the first ventilation system that was fan powered. The fan passed air from cold water and the air then spread in the house manually (Paventi). Later fountain water used to power the engine of the fan, thus reducing manual labor. Apart from the cooling effect of the water, the air became humid too (Paventi). In 1820 Michael Faraday, a British scientist, made a compressor that used ammonia (Paventi). Exhaustion of the toxic ammonia fumes became difficult and thus the cooling effect was unsafe. However, up to date his compressing technology is still in use.

Criminal Law Evidence Example

Criminal Law Evidence Example Please read carefully the scenario below and then complete the work for this assessment. A burglary has occurred around 21:00 hours yesterday at an office complex on an industrial estate. It has open entry round to the rear of the building. A metal top opening window was forced open and the intruder(s) gained entry, once inside, the building alarm system was activated. The offender made a tidy search of the office desks and drawers and it is suspected that 2 laptops and one PDA were stolen. The exit from the property was as entry. An eye witness states they saw a red coloured car leave the industrial estate at high speed, the make and model is unknown. Approximately 4 miles away from the scene on a park that borders the edge of a large housing estate was a stolen abandoned vehicle, its engine still running. The vehicle is a red ford focus reported stolen 1 hour previously from a private drive outside the home of Mr Andrews. The vehicle has been taken to a recovery garage pending a scenes of crime visit. CCTV on the park installed for anti-social behaviour has been viewed by Police Community Support Officers and they believe the individual running from the car is Michael Steven Kelter born 23/02/1987. Michael has previous convictions for burglary and anti-social behaviour related offences. He is also a known drug user. Uniformed Police Officers have arrested Michael Kelter on suspicion of burglary at the industrial estate and also for the taking of a vehicle without the owners consent. He is now detained at a dedicated custody suite pending interview with detectives. Attending police officers have found a screwdriver in shrubs outside the office complex, the screwdriver has been recovered and booked into the property store at the local police station. Officers also arranged for boarding up to secure the premises. It has also been reported that a male in his early 20s 3 days previously stated that he represented the alarm company and needed to have a look at the system. He presented no identification at the receptionist and was subsequently turned aw ay. CCTV footage has since been overwritten as it is on a 24hr loop. It is not known whether this is connected to the burglary. Assessment: Please devise an illustrative presentation of the potential evidence types available at each scene and identify the links between each scene. You will need to cite references to support your answer. Literature Supporting the Potential of Forensic Evidence. NAPIER, T.J., 2002. Scene linking using footwear mark databases. Science and Justice Journal of the Forensic Science Society, 42(1), pp. 39-43. Brief description of reference. BIERMANN, T.W., 2007. Blocks of colour IV: The evidential value of blue and red cotton fibres. Science Justice, 47(2), pp. 68-87. Brief description of reference. LOWRIE, C.N. and JACKSON, G., 1994. Secondary transfer of fibres. Forensic Science International, 64(2-3), pp. 73-82. Brief description of reference. Locard’s Principle According to Locard 1910 ‘Wherever he steps, whatever he touches, whatever he leaves, even unconsciously, will serve as a silent witness against him. Not only his fingerprints or his footprints, but his hair, the fibers from his clothes, the glass he breaks, the tool mark he leaves, the paint he scratches, the blood or semen he deposits or collects. All of these and more, bear mute witness against him. This is evidence that does not forget. It is not confused by the excitement of the moment. It is not absent because human witnesses are. It is factual evidence. Physical evidence cannot be wrong, it cannot perjure itself, it cannot be wholly absent. Only human failure to find it, study and understand it, can diminish its value.’ (Joe Nickell and John E. Fischer, Crime Science: Methods of Forensic Detection. Lexington: University Press of Kentucky, 1999. 10). Fingerprints often feature significantly at the scene of the burglary, within the stolen vehicle and on any property recovered from the burglary including the screwdriver that was discovered at the point where the stolen vehicle was recovered from. (FSS 2000, Supporting ‘Pathfinder’, Information on FSS and Police Fingerprint Process, Forensic Science Service). One of the leading figures in the development of fingerprint analysis was Sir Francis Galton who developed the tripartite classification scheme which sorts fingerprints into three groups and was used primarily to establish the heredity and character of the individual (Simon A. Cole Suspect Identities: A History of Fingerprinting and Criminal Identification (Harvard University Press, 2001), pp. 60-96.) Garton himself published a book entitled Fingerprints in 1892 in which he studied the frequency in which the patterns appeared in relation to the race of the supplier of the print. Unfortunately his results did not me et his expectations that there would be a significant pattern for a significant race. The use of the fingerprint database for the storing of fingerprints taken from convicted offenders is invaluable in identifying perpetrators of future crimes (Anthonioz, A., A. Aguzzi, A. Girod, N. Egli, and O. Ribaux, Potential Use of Fingerprint in Forensic Intelligence: Crime Scene Linking. Z Zagadnien Nauk Sadowych – Problems of Forensic Sciences, 2003. 51: 166-170.) Footwear marks are often a useful source of identification. It is possible to identify the wearer of the shoe from the footmarks by the way in which the patterning has worn. Although retailers sell many of the same item of footwear the wear marks on the shoes differs between users and therefore it can be very easy to get an exact match from the recovery of the suspects footwear to the recovered print. Some experts have stated that shoemarks and geographical information can assist in linking a suspect to a particular crime (Napier, T.J., 2002. Scene linking using footwear mark databases. Science and Justice Journal of the Forensic Science Society, 42(1), pp. 39-43). According to Jim Fraser who is the director of the centre for forensic science as the University of Strathclyde footwear marks were found at about 40% of crime scenes. He commented that most are not clean boot marks and usually need enhancing with UV light and that such prints can even be recovered from a carpet or a dead body (James Randerson, Footprint database to help fight crime, The Guardian, Tuesday January 30 2007). Items such a glass can be transferred to a suspect either through primary transfer or secondary transfer. Primary transfer usually occurs when the suspect is breaking a window which causes backward fragmentation (J. Locke and J.A. Unikowski, Breaking of flat glass—part 1: Size and distribution of particles from plain glass windows. Forensic Sci. Int. 51 (1991), pp. 251–262). Secondary transfer is where the glass transfers form one person to another or form one object to another person (Lowrie, C.N. and Jackson, G., 1994. Secondary transfer of fibres. Forensic Science International, 64(2-3), pp. 73-82. ) Research has shown that approximately 10% of glass fragments can be transferred from the person who broke the glass to another person (G.A. Holcroft, B. Shearer, Personnel communication). Others discovered that the transfer of glass between two people in a car only resulted in one such transfer in the 15 experiments that were conducted (.J. Allen, K. Hoefler and S.J. Rose, The transfer of glass—part 3: The transfer of glass from a contaminated person to another uncontaminated person during a ride in a car. Forensic Sci. Int. 93 (1998), pp. 195–200.) Certain types of clothing are more likely to allow such a transfer than others. clothes made from 100% nylon such as shell suits have a low retention level whereas jumper made of acrylic would have a medium retention level (T.J. Allen, K. Hoefler and S.J. Rose, The transfer of glass—part 2: A study of the transfer of glass to a person during various activities. Forensic Sci. Int. 93 (1998), pp. 175–193). Raman developed the notion of spectroscopy which focussed on the transfer of fibres that had been chemically dyed. The most common colours used in the manufacture of clothing are black, blue and red and therefore it can be difficult for the forensic scientist to differentiate the evidential sample from the suspect source (R. Palmer and S. Oliver, Sci. Justice, 2004, 44(2), 83–88.) In recent times the use of CCTV footage has been increased significantly with local authorities making use of the technology in the city centres to monitor the behaviour of people. This has proven particularly useful with regard to the monitoring of the behaviour of people when they have been drinking. CCTV footage can be of limited usage in that the images are not always sufficiently clear. There has also been much criticism of the fact that cameras are often pointing the wrong way or do not cover the locality of the offence. Images from CCTV can be enhanced to aid identification and often a suspect will enter a guilty plea having been shown the footage, especially if they are clearly identified by the cameras. As can be seen from the above there are many items that can be gleaned from the actual scene of the offence as well as from other areas that the suspect might have been present at. The notion of secondary transfer could weaken a case against a suspect, however the prevalence of secondary transfer is very low and therefore offers little in the way of protection for the suspect.

Essay --

Animal cruelty occurs all over the world. The human race has a major effect on the natural world, especially animals. Animal cruelty is an example of how man has taken advantage of his power. Those exhibiting cruelty towards animals have been proven to have a tendency to harbor violent psychological problems. Animal cruelty occurs all over the world. Fortunately, many countries have enacted laws and penalties to stop this harsh behavior. There are many anti-cruelty laws in the United States as well as other states. This laws prohibit torturing, beating, mutilating and unnecessary killing of animals. Also, they cover neglecting abandoning or depriving pets or farm animals of food, water or shelter. In 1822 the British parliment passed the Martin Act for animals protection, later on Richard Martin formed the society for the prevention of cruelty to animals. But the cruelty to Animals Act was not firmily established until the years of 1849 and 1854. As a matter of fact the word was finally starting to spread throughout Europe and even the United States because of this movement the American Society for the prevention of animal cruelty was later formed in the year of 1866 by Henry Bergin in New York. In addition to this in the nineteenth century many laws were passed both in Great Britain as well as the Unites States to protect the helpless, especially-children, lunatics, and domestics animals, from willful and malicious acts of cruelty. On the other hand, just as there are laws there are many weak laws that have been enforced to protect animals from cruelty. As a matter of fact not only are the laws weak, but they are also rarely enforced. The reason being is because police officers and public presecutors frequently view animal cru... ...althy individual, this is a warning.† There are deep psychological issues that lead to violent crimes against people† (cfawr). What is more shocking is that most animal abusers abuse animals for entertainment of both themselves and others, and to show their aggressiveness. In conclusion the simple of one adopting a vegetarian or minimizing the amount of animal products can prevent the death and suffering of millions of animals. There are many ways that one can prevent animal cruelty, is just a matter or wanting to do so. For example one is not so excited about chores at all, but when some one important is coming one cleans the houses, and leaves it shining, just with this much effort one needs to want to stop cruelty because it this matter is not stopped it could lead to even major problems, one does not know if this could lead to animal extinction.

My Mom Is My Greatest Influence College Essay

I’ve learned through the eyes of my mother that life isn’t easy. My mother has come a long way after losing her mother at a very young age and growing up with her father and grandmother and five siblings, one being a twin. My mom’s dad had to make sacrifices while raising my mom and her siblings; it wasn’t easy growing up without her mother, my mom put herself through college with the help of her dad. My mom has a successful career and is married and is raising a happy family. Initially I thought of a celebrity as a person with the most influence in my life, but as I thought about it, I realized my mother has had the most influence in my life, always smiling, laughing and having fun. When my mother is around it’s always a fun time with her, sometimes I have to say â€Å"ok, mom enough† and we laugh. My mother is always lifting others up and she always has an encouraging word for someone. My mother by far has had the greatest and most lasting impact on me; she is always there for me and has never let me down. My mother is the epitome of what it means to love unconditionally. She loves my siblings and I no matter what we do; she is always there for us and always gives us an encouraging word or quoting a verse from the Bible. My mother is the most caring person that I know, always helping people and praying for those in need. My mother would give her last to someone who needs it, especially if it means making his or her life easier. My mother would go as far as helping out her worst enemy, which I don’t think I could do, when I listen to my mom on the telephone sometimes she always has a positive attitude about everything regardless of what’s going on in her life. She is always willing to volunteer and help the needy. In her limited free time, my mom enjoys running marathons in order to raise money for charities she supports. She raised over $3,000 for the cancer society when she ran her first marathon on behalf of my godmother who has breast cancer. My mom will be running her 8th marathon this year and only God knows whom she will be raising money for. My mom will always try to crack a joke when she knows I’m not having a good day. My mom will tease me until I actually laughed and then she will say, â€Å"at least I made you laugh† and we would both laugh at that time. My mom is a very caring person and she always goes out of her way to make someone else’s day brighter even if she isn’t having a good day. My friends love my mom because she is always laughing and doing whatever she can to help others. A few weeks ago a friend of mine was having some problems at home and she needed a ride to work. My mom picked my friend up everyday from school, then dropped her off at work and then went back and took her home. She told my friend that she was there for her and she wanted her to talk to her parents and tell them how she feels. My mom wasn’t trying to cause any problems between my friend and her parents; she just wanted to help. As usual my mom told my friend she needs to pray and ask God for direction and guidance on how she can talk to her parents. My friends say I am just like my mother, and not to mention, we look just alike. I don’t think that is true, I can be funny like my mom sometimes but my mom is an exceptional lady and I think everyone should be able to look up to her. My mom never gets tired of giving and doing for others, even though her life wasn’t a bed of roses, she never let anything get her down in spite of the trials and tribulations she faced. My mom keeps the faith no matter what and for that one reason; my mother is the greatest influence in my life.

Great Migration

Beginning 1910 and leading through the end of the 1920’s, a â€Å"Great Migration† took place int he United States where more than 2 million African Americans moved from the Southern United States to the Midwest, Northeast and West. Much of the movement was a response to the high levels of racism in the South as well as employment opportunities in the growing industrial cities. The results of this movement not only affected the current economic climate but also led to many changes that would continue to evolve for generations to come.This essay is designed to provide a deeper understanding of the migration in order to hopefully provide insight into much of the culture we encounter in today’s society. As we explore the deeper reasoning behind the sudden migration of African Americans to the more urbanized locations of America, we must first consider the increased level of racism in the South of this time. â€Å"The primary factor for migration was the racial clim ate and widespread violence of lynching in the South. †1 With the Jim Crow laws being in effect, much of the idea of â€Å"separate but equal† facilities for African Americans was terribly skewed. In reality, this led to treatment and accommodations that were usually inferior to those provided for white Americans, systematizing a number of economic, educational and social disadvantages. †2 Through these disadvantages, a higher level of oppression was then conveniently enforced on African Americans of the South including voting restrictions, separation of schools and job restrictions. During and World War 1, the industries of the North began to grow significantly due to the needs of the war.As industries grew, so did the job market. With the increase in job openings and the restrictions placed on immigration to the United States, blacks from the South found opportunity to escape the harsh economic climate of the South. Looking at the growth of the cities, a connect ion is made with the railroad locations. â€Å"People tended to take the cheapest rail ticket possible. This resulted in, for example, many people from Mississippi moving directly north to Chicago, from Alabama to Cleveland and Detroit, and Louisiana to California. 1 With this mass movement, came a huge cultural shift among African Americans. Having better opportunities in industries away from the failing farming market, fighting in the Great War, and forming new communities away from the more severely oppressive South brought about a level of pride in their black culture, much of this leading to riots and protesting among African American groups. Even before the war, African Americans had stepped up protests against discrimination.The NAACP â€Å"fought school segregation in Northern cities during the 1920s and lobbied hard, though unsuccessfully, for a federal anti-lynching bill. †3 With the continued growth of black pride, it soon found its cultural expression in the â₠¬Å"Harlem Renaissance–the first self-conscious literary and artistic movement in African American history. During the 1920s, Harlem became the capital of black America, attracting black intellectuals and artists from across the country and the Caribbean. Soon, the Harlem Renaissance was in full bloom. †3Because African American migrants maintained much of their Southern culture and speech patterns, such differences created a sense of â€Å"otherness† in terms of their acceptance by others who were living in the cities before them. â€Å"Stereotypes ascribed to â€Å"black† people during this period and ensuing generations often derived from African American migrants' rural cultural traditions, which were maintained in stark contrast to the urban environments in which the people resided. †1 Many of these stereotypes are known and enforced even in todays society showing the underlying effect of racism in a culture years down the road.The Great Migrati on’s effects on our culture both political, economic and sociologically have effected much of where we are today. In hopes of branching even further from our tainted past, we must learn from it. â€Å"Those who cannot remember the past are condemned to repeat it. â€Å"4 -George Santayana Sources: 1. http://en. wikipedia. org/wiki/Great_Migration_(African_American) 2. http://en. wikipedia. org/wiki/Jim_Crow_laws 3. http://www. digitalhistory. uh. edu/database/article_display. cfm? HHID=443 4. http://en. wikipedia. org/wiki/George_Santayana