Population and Water Resources free essay sample

Abstract Water is a finite resource which means that the total amount of water in the planet is only limited. Its supply remains the same and yet human population recently grows resulting to a decrease of available amount of freshwater per person. The relatively small amount of available freshwater elaborates on how critical it is for everyone to help preserve and maintain clean, healthy lakes and streams, our sources of water. Water is mostly now being wasted because it is under-priced. We do not realize the significance of it. Also, the uneven distribution of water resources has led to the stage of scarcity in a number of regions. The paper aims to find possible ways on how to stop mans actions of wasting and teetering on the planets supply of water. Water is lifes matter and matrix, mother and medium. There is no life without water. -Albert Szent-Gyorgyi For survival, man depends on water. We will write a custom essay sample on Population and Water Resources or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page It circulates and goes through our bodies, replenishing nutrients and carrying away waste materials. Water came from the ice-capped mountains, melted and eventually became rivers and to oceans. It is the most distributed substance on our planet, and in different amounts it is available everywhere and plays a major role in human life. Of most importance is fresh water. No activities of human being and life is impossible without it because it can be substituted by nothing. In different histories, water has been a facet of ritual. Civilizations have emerged in different countries. The Chinese civilization originated in the Yellow River (Huang Ho) and the Egyptian from the Nile River. Both rivers have the ability to produce fertile soil, which made it easy for cities to spring up alongside the banks. The Earth’s supply of water remains the same and yet the world population continues to grow. Apart from the population increase and the low rainfall in many densely populated areas, demand for water has risen for other reasons. In the world today, progress and prosperity go hand in hand with a reliable water supply. Fresh water is renewable only by rainfall, at the rate of 40,000 to 50,000 cubic kilometers per year. But due to the intensive urbanization, deforestation, and industrial farming, the earths surface is drying. If present trends still persist, the water in all river basins on every continent could steadily be depleted. Contamination by pollutants has seriously degraded water quality in many rivers, lakes and groundwater resources reducing the supply of water for human use. While the increase in population alone has increased the challenges to water management, particularly in the area of sanitation, the greatest threats are from a wide variety of industrial and agricultural sources. Drinking and tap water are often wasted because they are under-priced. The cost of using or mis-using water is paid either by commonly the user or at large by the community. As water demand continues to increase, it becomes even more important to see that it is directed to high-valued social uses. As the population increases, the amount of freshwater available per person decreases. Man has been moving unsteadily on the edge of a global crisis that is being worsen by climate change, which are shrinking glaciers and raising sea levels. Between 1900 and 1995, world demand for water multiplied by six, twice the rate of population growth over the same period. The six billion people use nearly 30% of the world’s total accessible renewal supply of water. By 2025, that value may reach 70% and yet billions of people lack basic water services, and millions die each year from water-related diseases. According to the United Nations, more than one billion people living on earth already lack access to fresh drinking water. Just as our bodies require water to dispose of waste products, abundant water is required for proper sanitation. Food production would also be dependent on water. Many crops, of course, are watered by rain, but in recent times irrigation has become the key to feeding the worlds rapidly growing population. Today 36 percent of the worlds harvest depends on irrigation. But the worlds total area of irrigated cropland reached a peak about 20 years ago, and it has been falling steadily since then. If a large amount of water flows out in our home and if we have a hygienic toilet that conveniently flushes away waste, it may be hard to believe that the world is running out of an adequate supply of water. Only 20 percent of mankind enjoy such luxuries. In Africa, many women spend as much as six hours a day fetching water and frequently it is polluted.

Creating a logo using ICT Essays

Creating a logo using ICT Essays Creating a logo using ICT Essay Creating a logo using ICT Essay The hardware I used to produce my coursework was the school computers. I completed the work in lesson time, and did research in my own time. With the use of Windows XP on the school computers, I used Microsoft Word to complete all word processing tasks as well as using the mail merge technique when creating my wage slips. I used Microsoft Excel to do my calculations. I used Microsoft Paint to create my company logo, and Microsoft Publisher to scale the image. Company logo A newer computer could have made a difference because an improved graphics program could have made my company logo look more professional. The 2 main categories of software used are Operating systems and Applications software. The Operating System is the name given to software that enables applications software and the rest of the computer system to work. A computer will not be able to function without an Operating System. The most popular types are DOS, Windows 95, 98 and ME, Mac OS, Windows NT and 2000, UNIX and Linux. Each has 5 main tasks: 1. To permit applications software to converse with the systems hardware. 2. To enable the application (e.g word processor) to operate. 3. It manages system resources. E.g, it allocates RAM to particular tasks and in a network, it decides what resources to give to individual users. 4. It monitors and observes the performance of the system, and gives prompts and error messages to the user. For example, it will tell the user that a floppy disk is full and that a new one will need to be used, or that the application is low on resources. 5. It operates utilities such as virus-scanning software. The software I used were Microsoft Word, to word process my reports. I used Microsoft Excel to do automatic calculations, which helped to produce my wage slips. I used Paint to produce my logo, I could have used a more professional program such as Paint Shop Pro or Adobe Photoshop to make my logo look more professional. The input devices are: * Keyboard These are the most common input devices, each of the keys on a keyboard are connected to a switch that closes when the key is processed. If the user is quite new to computers, the process of typing can be slow. * Mouse A mouse is very easy to use, there are usually 2 or 3 buttons on a mouse. When the cursor is placed over an icon, for example, the mouse buttons can be clicked, double clicked, or right clicked. Sensors measure the movement of the ball, and from this, the computer can work out the direction and distance the mouse has travelled. * Scanner With scanners, a picture is passed through it and is converted into digital data. One of the benefits of using a scanner is that the image can be manipulated and edited. * Camera -They are like scanners, they save an image as a series of dots known as pixels. The Image taken can then be uploaded to a computer and also may be edited using a photo editing software. I didnt make use of the camera or scanner; my coursework could have been improved by using the scanner to scan in a drawn logo. The output devices are: * Printer The printer I used is a Hewlett Packard LaserJet 4050, which was the only printer we could have used. Its a laser printer, meaning that the data can be sent to the printer in complete pages, one page at a time, they are similar to photocopiers. Advantages are that, they are very quiet, very fact (10 pages a minute), and the printing produced is in very high resolution and can produce high quality documentations. The most cost effective printer would be the ink jet, as I costs less than laser printers and produces better quality printouts than dot matrix printouts. * Monitor also known as VDUs (Visual Display Units) are used when visual information is needed and is most commonly used as an output device. User guide for system * Firstly turn on the machine and log onto the network by entering your username and password, then, let the network load. * Open the application the needed to create the logo, in this case its Paint. Use the various tools on the left hand side and the extensive colours on the bottom to create the logo. * When you are happy, click on File at the top left hand side of the screen then Save give it a file name then click on the drop down button next to Save as type and save it as a JPEG, these are better than bitmaps because JPEGs are much smaller in file size. * The mouse is only really needed in this program unless you need to enter a number in order to rotate the graphic to a certain degree. * Next, open the spreadsheet application; in this case it is Microsoft Excel. Enter the various data and formula into the cells using the keyboard. * When this is done, go to File then Save and choose a file name before clicking Save. * When printing, click File then Print choose the desired number of copies you wish to print then click OK. * To shut down the system, simply click the Start button on the bottom left hand size of the screen, then Log Off. User Documentation The system must be tested both during building and after it has been built. As the name suggests, user documents are written to help the people who will perform tasks using the system. They give instructions on how to perform tasks, it can be hard to write because it needs to be written in simple language form so the users can clearly understand what it is they need to do. A good tip would be to pretend that the person reading it is thick! In my user documentation, to make it better, I would break it down into smaller steps so it is easier for the person who is reading it to understand. A trouble-shooting guide is a way of help if you unsure of what to do in the program you are working on. In the Microsoft applications I used, such as Word or Excel, the shortcut key to bring up the troubleshooter is F1. A common problem that I came across during the coursework was that the computer crashed in the middle of a word document, the problem was resolved by rebooting the system, but it would then be hit or miss, as my work would either be lost or recovered. How ICT has benefited the system IT has helped my system in a number of ways: Advantages It helped create the wage slips in a much more quicker and efficient way, by using the mail merge technique; it saves time instead of producing 10 separate wage slips. Using ICT saves on storage, you can keep a database with all your employees information, which saves keeping information in large filing cabinets, it also take time to search for a particular employee. In work, fewer staff are needed to look after the computer system and more than one person can access the same data from their network P.C Disadvantages The disadvantages of keeping your employees information on your computer would be that, information could be lost, or your computer may catch a virus, causing all your files to be infected thus, having to wipe off all memory from your system. The system would also need to be kept secure and away from hackers, meaning that the system must be maintained by people, therefore, training costs could be high Setting up a computer system or network can be very expensive. Systems for large organisations can cost millions of pounds. Even though they are very comprehensive, computer systems are not perfect, if there is a system failure, important data could be lost. My system I worked on the school computers, the system worked good, however it was quite restricting due to some of the features that you could not access. An alternative solution would be to use my home computer, but that would mean not being able to do any work in lesson time. Given more time, I would.

Biology Assignment Example | Topics and Well Written Essays - 750 words

Biology - Assignment Example The number of cups of coffee should also depend on how much the escort and the professor can wager. 4. I believe the cups should not be identical. Perhaps there should be 3 designs and 4 pieces each, so 12. Maybe the design can affect the result of the experiment. I believe one kind of design is glass, another is plastic and the other is ceramic, because the coffee or milk might taste different with different material of the cup. If possible, I would like to prepare some cold and some hot, because it is possible that temperature might also affect the taste of the coffee or milk. 5. The order that the cups should be presented must be random so the only way I could think of is by jumbling the arrangement of all 12 cups but the escort and professor should take note which cup has milk or coffee added first. After that, any random cup from the group of 12 cups can be given to the model until she finishes tasting everything. 6. I think if she has guessed at least 75% of the cups correctly (minimum of 9), then we can say that the hypothesis is true. If we decide only after 50%, then maybe it is not enough and maybe she is just a good guesser. 1. The hypothesis I chose was different because it was a practical hypothesis. According to Fisher, if we use a null hypothesis we can exclude the possibility that the order of the cups has an influence on the results. However, if we use another hypothesis, then there might be confusion. So it is better to say that the order of the cups and other factors have no effect on the ability of the model to distinguish whether coffee or milk was added first. 2. My answer was the same as Fisher’s. I thought that â€Å"if only two cups are given to the model, then she will be able to simply freely guess whether the first cup had milk added first or if it is the second one.† According to Fisher, if only 3 cups can be chosen, then complete success can be achieved by pure chance. 3. I said the