Databases essays

Databases essays The database consists of characters or a group of characters that form a field. A related group of fields creates a record. The records are combined to form a file. The files are grouped to form a database. Databases can contain only characters or can also include images, sound, and movies to form a multimedia database. Businesses need data so that it is available, modifiable, and controllable. Data files can be organized in a sequentially, direct, or indexed file. The data must be kept up to date and correct. To do this a data validation process must be used. The advantage of data files is that they are easy to use. The disadvantages are that when multiple data files are required for the business a lot of duplication of data and effort is involved; this is where databases comes to play. The database consolidates the different data files into one database and is managed with database management software. The database is a collection of data and relationships in the stored data. Throu gh the relationships established in the database the updating of the database normally requires single entries for one field or record. The database will then update the other databases within the whole database based on that input. This is the primary advantage of the database method of managing data. The greatest disadvantage of database software is the cost of the software and the need for a more powerful computer with larger storage, both primary and secondary, to store the data. Another disadvantage is that the database is stored altogether on one disk, if that disk is damaged or destroyed all data is lost. The final disadvantage is that systems utilizing this system can be complex to develop. Database relationships can be one-to-one, one-to-many or many-to-many. The most common type of database in use today is the relational database utilizing one of the relationships. The relational database requires the use of a primary key that uniquely identifies ...

23 Uplifting Things to Do on Thanksgiving Day You Must Try This Year

23 Uplifting Things to Do on Thanksgiving Day You Must Try This Year Thanksgiving is one of the most bright and cheerful holidays of the year, a day to spend with your family and friends and get together for a tasty meal and peaceful evening. Here are some things to do on the Thanksgiving day to make it memorable and fun. Celebrating With Your Family For many families, Thanksgiving weekend is a chance to enjoy rare meetings and festive mood. 1. Cook a dinner. Cooking a dinner with your family is a touchy and precious moment for you and your family to remember. Its also a great way to show your gratitude and lend a helping hand to the hostess. 2. Watch Thanksgiving Day Parade. Parades are held in many cities and watching them on TV or in real life makes this day really special and festive. 3. Play sports. There are multiple health benefits of spending time with your relatives outdoors. Sports activities are useful in particular considering a full course dinner ahead. Tennis, basketball or frisbee are great activities for big families. 4. Watch an old movie. Thanksgiving is a great opportunity to sit altogether by the TV. Your family may choose a movie to watch annually and make it a good family tradition. 5. Look through family photos. Make this holiday a little bit nostalgic: your elder family members will enjoy that. Some of your family members could even start asking you awkward questions about your life in college. 6. Decorate the table. Dont forget about fancy napkins and candles! Beautiful decorations will set up the mood for tasty dinner. 7. Take a trip to the countryside. Living in a big city might be stressful so spending a weekend in the countryside is a relaxing and healing way to celebrate. 8. Make a wish by breaking wishbone. While carving a turkey take out a wishbone and let it dry. After the dinner, two family members pull at it and the winner makes a wish. 9. Participate in Turkey trot race. Burn up some calories before the big dinner and also raise some money for low-income families. Celebrating With Your Friends Friendsgiving Being away from home doesnt mean that Thanksgiving is canceled. Make it into Friendsgiving which tends to gain popularity through last years. Even with poor cooking skills, you can still throw an amazing party and even set up a new tradition among your friends. 1. Play video and board games. Entertainment is an important part of the holiday. So dont forget to prepare the list of games you and your friends will enjoy. Apples to Apples, Jenga, Clue are not taking too much time to play as Monopoly so are a better choice for a fun evening. 2. Watch annual football game. If you and your friends enjoy sports, its a good idea to watch a sports channel together and cheer for your favorite team. 3. Watch the best episodes of favorite sitcoms. Share the episodes you enjoy the most with your friends. Holiday-themed episodes will fit the most. 4. Set up a picnic. If the weather is fine and you dont want to stay inside, go ahead and pack for a picnic in the nearest park or wood. Fresh air and the beauty of fall weather are great for active games and sincere conversations. 5. Ride bikes in a park. Fast and active ride in a park can easily burn off calories you’ve consumed this holiday weekend and also set up a good mood for the rest of the day. 6. Pajamas party. Its more untraditional way to celebrate Thanksgiving but definitely a fun one. Cozy pajamas, chilling music and tasty snacks among holiday lights will create a relaxed holiday mood. Sounds nice, doesnt it? However, there are even more party ideas for students to celebrate Thanksgiving Day. 7. Play football. Team active sports are great before big festive meals. Football is a traditional game for this holiday and it is fun to watch for those, who choose not to participate. Celebrating on Your Own Dont be depressed if you are celebrating this day without guests. Make it a real holiday for yourself and do what makes you happy. 1. Take a good nap. Thanksgiving weekend is a wonderful time to shake off stress from studying and working the whole year. So take a time to relax and get a good rest. 2. Take popcorn and watch a favorite movie. Is it Scream or Batman? Grab a big bowl of popcorn and turn on your favorite movie or sitcom. 3. Take a long walk or ride. Sometimes you really need to fresh up your thoughts and walking in the fresh air is a way to do it. And its a great cardio exercise. 4. Prepare for Black Friday. If you are about to go shopping on a Black Friday, make a list of things to buy and shops to visit the next day. This will help you to concentrate on things you really need and not to be distracted on sales. 5. Volunteer. Your local churches or homeless shelters may need some help, especially at this time of the year. You can help with cooking and serving a meal or donate redundant clothes to charity. By the way, did you know how many benefits you get from volunteering? 6. Make a thankful list. This is more than just a good tradition but the way to concentrate on aspects of the past and stay positive for the future. So go ahead and make a list of things that have brought you happiness this year and what you are thankful for. 7. Watch Thanksgiving documentary. There are plenty of amazing historical movies about pilgrims and origin of Thanksgiving Day which you will find interesting. Enjoy your Thanksgiving and don’t forget to give your thanks!

Jacobs and Douglass' Narratives Regarding the True Escape from Slavery Research Paper

Jacobs and Douglass' Narratives Regarding the True Escape from Slavery - Research Paper Example \Writers such as Harriet Jacobs and Frederick Douglass provide examples of the dehumanizing elements of slavery, hinted when Jacobs comments â€Å"Slavery is terrible for men, but is more terrible for women†, while also providing clues as to how slavery might be escaped through education as in Douglass’ statement, â€Å"You have seen how a man was made a slave; you shall now see how a slave was made a man.† These examples and clues can be found in Douglass’ Narrative of the Life of Frederick Douglass and Jacobs’ Incidents in the Life of a Slave Girl. Both books bring into sharp relief the miserable conditions of a slave’s life and the ways in which it dehumanized the black people. Douglass sadly informs the reader that he is uncertain of his age or the day he was born and, although his mother died when he was seven years old, he was relatively unaffected by the news as he had been separated from her since infancy. â€Å"Never having enjoyed, to any considerable extent, her soothing presence, her tender and watchful care, I received the tidings of [my mother’s] death with much the same emotions I should have probably felt at the death of a stranger† (Douglass Ch. 1). By the time Douglass was seven, he had learned of the death of his mother, watched his aunt brutally whipped and had taken his own place at work in the fields. He describes the life of the slave, illustrating its bestial level of survival existence and the types of behaviors they were expected to exhibit when they were in the presence of their mas ters. Jacobs also focuses on the brutality of slavery in her description of early life as a slave girl actively pursued by a lascivious slave owner. The only way she can avoid becoming her master’s black mistress at the age of 15 is to give herself up to another white man of her own choosing. â€Å"I shed bitter tears that I was no longer worthy of being respected by the good and pure

Critical analisis essay. SPANISH Essay Example | Topics and Well Written Essays - 1250 words

Critical analisis . SPANISH - Essay Example Uno de los elementos claves que ayudan en la puesta en practica de este sistema de control es la existencia de una figura de poder, cuya identidad es de poca importancia, asi como tambien la existencia de una red de personas, cuya identidad tambien es intrascendente, que ayudan en el ejercicio del poder. De hecho en la historia la mancha indeleble el personaje principal solo puede escuchar una voz, dicha voz es incorporea y, segun el personaje principal, no podia relacionarse con un ser de carne y hueso: La voz llenaba todo el salon y resonaba entre las paredes†¦Yo no podia saber de donde salia. Tenia la impresion de que todo lo que veia estaba hablando a un tiempo: el piso de marmol negro y blanco, la alfombra roja que iba de la escalinata a la gran mesa del recibidor, y la alfombra similar que cruzaba a todo lo largo por el centro; las grandes columnas, las cornisas de cubos dorados, las dos lamparas de cristal de Bohemia (Bosch 1). Este extracto nos hace pensar que ni el gene ro, ni la posicion social, ni la profesion de dicha figura son de consecuencia. Lo que si es fundamental es que la figura no pueda ser vista por los individuos que son vigilados. Asi como tambien que el individuo crea que el sistema disciplinario, cuyo representante en la historia de Bosch es la voz incorporea, tenga un alcance total. Como ya se ha mencionado, esta figura de poder no es la unica persona en todo el sistema. Tambien hay otras personas que ejercen diferentes funciones dentro de este sistema de control. Cada individuo tiene un papel que jugar y es, a su vez, supervisado por alguien de mayor jerarquia. En Pormenores de una servidumbre de Pedro Peix, el Benefactor claramente representa la figura de poder, pero durante todo el relato hay personas, cuya identidad tambien ignoramos, encargadas de realizar los trabajos sucios. Hay personas encargadas de grabar las sesiones amorosas de la esposa del personaje principal con otros hombres, hay personas que encargadas de seducir a la hija del personaje principal, hay personas encargadas de contratar la banda y las prostitutas que se apostaron en frente de la casa del personaje principal. Y, tambien, esta la persona encargada de hacer las llamadas telefonicas que el personaje principal recibia (Cespedes). Esta claro que este sistema es extenso en su practica y que abarca todas las areas de la vida cotidiana del individuo, incluso las areas mas intimas y los detalles mas pequenos no estan fuera del alcance de este regimen. En el relato de Bosch una voz incorporea le pide al personaje principal que remueva su cabeza pues ya no la necesitaria. Y el personaje principal le indica que no puede despojarse de su cabeza tan facilmente: Deme un tiempo para pensarlo. Comprenda que ella esta llena de mis ideas, de mis recuerdos. Es el resumen de mi propia vida. Ademas, si me quedo sin ella, ?con que voy a pensar? (Bosch 2). Sin darle mucha importancia la voz le contesta que ya no la necesitaba pues ellos (los miembros d e este sistema disciplinario) pensarian por el y que sus recuerdos eran innecesarios. Un sistema como este, que no tiene ningun reparo en declarar que las ideas, las emociones y

Aztec Art and Culture :: essays papers

Aztec Art and Culture The Aztec nation is one of the largest and most advanced Indian nations to ever exist on earth. Just about every part of the Aztec life was advance to such a state that at that time of the world the people were living better than many European nations. The Aztec nation is unique in its history, economy, environment, and way of life then any other nation at that time. The Aztec Indians, who are known for their domination of southern and central Mexico, ruled between the 14th and 16th centuries. They built a great empire and developed very modernized ways of doing things. The Aztecs had phenomenal architectural skills and waterway systems. The Indians also had very developed social class and government systems and practiced a form of religion. To begin with, the Aztecs were very skilled in the art of Architecture and waterway systems. â€Å"An example of the monumental architecture within the Aztec society is the great pyramid of Tenochtitlan. Montezuma I, who was the ruler of the Aztecs in 1466, created it. The pyramid was not finished until the rule of Montezuma II, around 1508. Aztec cities and towns also had working drinking water and waste treatment systems. An intricate plumbing system using clay pipes ran down from the mountains around Mexico valley to all of the towns and cities in the valley. As the water ran into each town or city it was dispersed to 10 or 12 places around town were it flowed into a pool for drinking water or was pumped into public baths and toilets. Only nobles had working drinking and bathing systems with running water in their homes. The sewage system worked much like today, having human wastes carried to a collection pool where solids were collected, and then having liquids run off into a series of terraces which filtered the water. Solid wastes were allowed to sit in a collection pool for about six months and then were brought to the lake gardens to be used as fertilizer†(Jennings, Aztec, Pg. 220). At the bottom of the heap were slaves and serfs, or the Tlacotli, who worked the private lands of the nobility. Next came the Macehualtin, ‘the fortunate,’ as they were called because they were equally free of the heavy responsibility of the nobility and of the slave’s liability to being basely used. They were the merchants, shopkeepers and artisans that made up the bulk of the population.

Global Fishing and its Impact on the Environment Essay

The demand of fish in the international market has been increasing in the last few years. This is because many researches on nutrition have revealed that consuming fish is one of the best healthy practices. Fish does not have a lot of fats and bad cholesterol and it is a good source of vitamins and natural nutrients. This paper is about the trends of fishing in the global arena and its impact on the environment. The paper will concern recreational and commercial both types of fishing and the problems they are causing to the marine environment. The current state of global fisheries, aquaculture and the environmental cost of fishing will be the main subjects of interest in this paper. Although many countries have started efforts to develop practices of sustainable fishing through developing the idea of fish farms, however, the main threat to the environment is recreational fishing. The impacts on the marine life itself and the fish population will be discussed in the paper. Current State of Global Fisheries There was a steady rise in fishing, according to the United Nations Food and Agricultural Organization, until the mid 1990s when the trend became stable. In 2001, a study showed that the marine catch has been declining at a rate of 10% each year since the late 1980s. There have also been estimations that around 50% of the world’s fish reserves have been fully exploited, around 20% are overexploited and another 10% are depleted because of overfishing. The histogram graph below shows the increasing share of aqua culture in the total fishing, however, the largest share of the total fish catch is still for the fish being captured from free waters. Southeast Pacific regions contribute the most to the catch of fish globally. The fish that have been captured the most are anchovy and Chilean jack mackerel (Hart & Reynolds, 2004). Figure 1- (Hart & Reynolds, 2004) The research has also shown that almost 80% of the total fish captured was used for direct human consumption while other 20% went for further processing for non-consumption production. In the year 1997, the per capita consumption of fish has increased in the past 50 years from 9 kg per person to around 16 kg per person each year. This was the data for underdeveloped countries; however, the consumption in the developed countries has risen from 20kg to almost 28kg per capita per year. In the underdeveloped countries, the protein intake from the consumption of fish can form 20% of the total intake. In the developed countries and in the Southeastern Asian countries, the consumption is much higher (Hart & Reynolds, 2004). The top ten countries which are the largest catchers of the total fish catches include China, Japan, India, United States, Russia and Indonesia. However, China is the largest catcher of fish as the total amount stands to around 12 million tons of fish (FAOSTAT online database, 2010). The demand of fish is stable at the moment but as the population rises, the demand for fish will also rise. It has been revealed that the people in the developed countries are more prone to eating fish as their per capita consumption is higher than people living in underdeveloped countries. Another point of concern is that the population is rising at a very high rate in countries such as India, Pakistan, Indonesia and the Middle-East where the catch of the fish is also the highest. Figure 2 Impact of Global Fishing on the Environment Today, the exploitation of the fishery resources and reserves has become a major environmental factor of concern for the scientists and environmentalists. The worldwide declines in the population of fish species have been blamed to the excessive commercial fishing and unrestrictive recreational fishing. A recent study has revealed that the total fish harvest from recreational activities may contribute up to almost 12% of the total catch of fish globally (Cooke, Steven, & Cowx, 2004). Fish has been one of the most important food consumption resources that are at risk because of limitless recreational activities and commercial fishing. The potential contribution of fishing to the marine environment and the ecological system of the world has caused many problems in the environment already. Currently, the fish production is meeting the requirements of the population in the countries, but at a great environmental cost. The marine life is not only being endangered by the fishers but their breeding grounds have also been invaded by the commercial companies. These breeding grounds are the safe places for the fish. Though the fish are being bred in huge numbers, but their homes are being destroyed which does not allow the fish to be born. Although a fish can give birth to hundreds of its offspring in one season, but if these offspring are dead before they are born, then the ecological system in the waters is seriously disturbed. According to a research, the increasing pressure of fishing and exploitation of resources in marine life has caused a change in the ecological structure and the ecosystem. The fully developed fish and adult members of the fish are more fondly searched by the commercial and individuals as they render more profits and meat for the production. Therefore the adult population which is responsible for breeding and generating offspring are in great danger by the human activities in the seas. Climate change has also been attributed to the changes in the ecosystem which affect the marine life and decrease their population. In the future, therefore, the fish population, available for human consumption, is anticipated to fall and cause demand supply problems. The primary reasons for this are the attack of the humans on the marine life for consumption, recreational activities of the human individuals and the change in the global climate which is changing the living habitat of these fish (Planque, 2010). Aquaculture Production The term aquaculture is used for the farming of the fish and other marine species including aquatic plants, crustaceans and mollusks in an artificial environment which is fit for their breeding. This is done in order to protect the species of the fish which are getting extinct or for sustainable farming of fish. This practice is very good for the sustainability of the fish in free water as they are not hunted in their breeding grounds. When grown and fully ready, these fish are harvested by a company or an individual who has owned them throughout the period of growth and development (European Commission, 2007). This practice is the only option for meeting the demand of the human for fish consumption. Fishing for recreation has proved to be disastrous for the marine life and the water environment. The whole ecological system is disturbed because of excessive fishing. Aquaculture is mostly being performed for the human consumption but does not addresses the issue of recreational fishing. Aquaculture is also used to presence the dying species by providing the required temperature, environment and food for their existence. Many of these fish could be released in to the wild waters so that they could be used in the recreational activities (Stickney, 2009). Conclusion In order to keep the demand consistent with the supply for fish in the global market, the practice of aquaculture will have to be adopted. The main issues that the fish face are the recreational activities of the human, commercial overexploitation and the change in climate of the world. These problems are changing their habitat environment and hence these fish are getting endangered. However, we should keep in mind that all of the fish species are not being caught for human consumption. Hence, aquaculture will not be able to address this issue. Other strict rules and regulation will have to be implemented by the governments in order to stop the recreational killing of fish. Only the hunting of those fish should be allowed which are abundant in the waters. Aquaculture could be used to breed those fish which are primarily used for the consumption of human through providing an artificial environment where the fish can grow up in a protected way. Bibliography Cooke, Steven, & Cowx, I. (2004). The Role of Recreational Fishing in Global Fish Crises. BioScience , 54 (9), 857-59. European Commission. (2007). Eurostat. Retrieved May 9, 2010, from Eurostat Pocketbook: http://epp. eurostat. ec. europa. eu/cache/ITY_OFFPUB/KS-DW-07-001/EN/KS-DW-07-001-EN. PDF European Commission. (2009, September). Eurostat. Retrieved May 9, 2010, from Fishery Statistics: http://epp. eurostat. ec. europa. eu/statistics_explained/index. php/Fishery_statistics FAOSTAT online database. (2010). NationMaster. Retrieved May 9, 2010, from Environmental Statistics: http://www. nationmaster. com/graph/env_mar_fis_cat-environment-marine-fish-catch Hart, P. , & Reynolds, J. (2004). Handbook of fish biology and fisheries. Oxford: Blackwell Publishing company. Planque, B. (2010). How does fishing alter marine populations and ecosystems sensitivity to climate? Journal of Marine Systems , 403-417. Stickney, R. (2009). Aquaculture an introductory text. Oxfordshire: Cambridge University Press.

Educational Technology Theories and Theorists Essay

Introduction Technology is becoming more and more predominant in society. The concept of technology is a reality that has pervaded not only our everyday lives but our mere state of existence. Technology has affected every aspect of society. There is no doubt that technology holds great potential for improving the way that people learn and ready or not, technology is affecting education. Educational Technology Ever since the integration of educational technology there has been a dramatic shift in most of the paradigms on which traditional learning exists. The concept of incorporating technology with education is one that has gained widespread attention. Effective use of educational technology is critical to solving numerous†¦show more content†¦Constructivist teaching empowers students in a way that allows them to construct their own knowledge rather than reproduce someone else’s. Constructivism allows students to build rather than receive knowledge. Constructivist learning focuses on real problems, creative solutions, transfer, and problem solving. Educators function as guides or facilitators that assist students as they generate solutions and explore in complex and rich environments. Constructivism as a theory will be forced into play within our school by emerging technologies. Piaget’s Theory of Cognitive Learning Jean Piaget is renowned for constructing a highly influential model of child development and learning. Piaget’s cognitive learning theory is based on the idea that the developing child builds cognitive structures for understanding and responding to physical experiences within his or her environment. Piaget further demonstrated that a child’s cognitive structure increases in sophistication with development, moving from a few innate reflexes such as crying to highly complex mental activities. Piaget’s theory is primarily known as a developmental stage theory, but in fact, it deals with the nature of knowledge itself and how humans come gradually to acquire it, construct it, and use it. Bruner’s Theory of Constructivist Learning Jerome Bruner was one of theShow MoreRelatedDichotomy Between Theory and Practice in Education1173 Words   |  5 PagesThe interaction between â€Å"theory† and â€Å"practice† in education is a dichotomy that people have been trying to understand for over 2,000 years. The relationship between theorists and practitioners is very complicated because there are issues that surround the pace of change in theory and practice. The debates that have occurred continue to occur through today in an array of perspectives about the purpose of education and about how to encourage learning. 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