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The Benefits Of Laptops And Wireless Cards :: Technology Computers Papers

The Benefits Of Laptops And Wireless Cards The CEO of Viacom/Blockbuster was once cited for saying, â€Å"The data superhighway is ...

Thursday, October 31, 2019

Global poverty Research Paper Example | Topics and Well Written Essays - 500 words

Global poverty - Research Paper Example It is of interest to me because I would like to establish how the global poverty affects not just the poor countries but also the rich nations. I am interested in finding out how their relations with each other impact on the occurrence or incidence of poverty. This topic is also of interest to me because I would like to find out how different countries are responding to this issue and what interventions have already been implemented in order to resolve this issue. 1. United Nations – This organization is involved in alleviating poverty through the various programs it has set and implemented on its member countries (MacMillan, 2011). One of these programs include the Millennium Development Goals which has set forth activities on reducing poverty, improving health outcomes, increasing employment opportunities, and in promoting peace in developing countries (UN, 2010a). This organization would likely require research in relation to the achievement and the fulfillment of its MDGs (Tran, 2011). Such a research would provide feedback on the efficacy of its programs. 2. CARE is a United States-based organization whose goal is to fight global poverty by focusing on poor women providing them with access to education, preventing diseases, providing them access to clean water, expanding their economic opportunities, and protecting their natural resources (CARE, 2012). This organization would likely require research on the impact of poverty on women in developing countries. Such a research direction would seek to establish the possible solutions which can be directed towards poor women. 3. BRAC – is an organization established by former Shell Oil CEO Fazle Hasan Abed. Its goal is to empower the people and the communities who are in extreme poverty, including those who are illiterate and those who are victims of disease and

Tuesday, October 29, 2019

Maintaining Systems & Upgrades Essay Example for Free

Maintaining Systems Upgrades Essay Utility software are computer programs designed to manage and tune up the computer OS and hardware. They prevent or reduce problems by diagnosing and correcting the faults before it gets worse. Some of the main utility programs are described below: Disk De-Fragmenter A de-fragmenter scans for fragmented computer files and move them together to increase efficiency. It reduces the amount of fragmented files in a computer system. It tidies up the hard-drive reusing the space more efficiently after a disk cleanup. Defragmentation’s result will be the best if it’s carried out after a disk cleanup, as all the unwanted files will be deleted. The application can be loaded from the control panel or from All programs/Accessories/System Utilities from the Start Menu. Clicking on the Analyse button on the application window shows the estimated disk usage after defragmentation. We can then choose to defragment the disk by clicking on the Defragment button. Screen shots of the defragmentation process are displayed below: image00. png image01. png The screen shot above shows the result of the process. Antivirus Antivirus software prevents and removes Viruses, Worms and Trojans from the computer. Most of the antivirus software comes with built in spyware, adware and malware removal tools. Antivirus software uses different methods to detect viruses; Signature based detection, Malicious activity detection and Heuristic based detection. Signature based detection is the most common way of antivirus and other malware detection. The software traces the virus by spotting the signature. The software manufactures collect profiles and signature information of the virus in the form of DAT files. These files will be downloaded by the antivirus software through updates and will be used to detect new malwares. This makes it essential to keep the antivirus software up-to-date and to run virus scans periodically. Firewall Firewall is a utility designed to prevent unauthorised access to from a private network. It prevents unauthorised internet users from accessing private networks connected to the internet. All the packet data entering and leaving the computer is examined when it passes through the firewall and will be blocked if the packet data do not meet the security criteria. Firewalls build a protective environment around computers that are connected to a network. Firewall uses four different types of techniques to block unauthorised access. They are: Packet Filter : Packet filter scans each packet of data entering or leaving a network and block them if they are not based on the user-defined rules. This kind of filtering is an effective method to prevent unauthorised access. Application Gateway : Application gateway applies security measures to applications like FTP and Telnet Servers. This is another effective firewall technique, but it really affects the performance of the network. Circuit-Level Gateway: Circuit-level Gateway applies mechanisms when a TCP connection is established. Once the connection is made packets can flow between hosts without further checking. Proxy Server : This technique is used to intercept all messages entering and leaving the network. The proxy server hides the real network address. Formatting Formatting is the process of preparing a hard disk or a storage medium to store data. Formatting a disk involves two major process: High Level formatting and Low Level formatting. Physical formatting(low-level) Low-level formatting is the process of outlining the position of tracks and sector on hard-drives and other storage media. All the data in a drive will be lost permanently after a low-level formatting is done. A low-level formatting is generally done by the BIOS rather than the Operating System. Logical formatting (high-level) High-level formatting is the process of setting up an empty file system on the disk and installing a boot sector. As this process takes only a little time it is commonly known as Quick Format. In this process the disk also have the option to scan the entire disk for potential defects which may take several hours depending on the size of the medium. Below is a screen shot of a Quick Formatting.image02. png Disk Cleanup The Disk Cleanup tool helps to free up space on the hard disk by searching disk for files that can safely delete. You can choose to delete some or all of the files. Disk cleanup tool can be used to perform the following task to free up space in a hard-drive. Remove temporary Internet files. Remove downloaded program files. For example, ActiveX controls and Java applets that are downloaded from the Internet. Empty the Recycle Bin. Remove Windows temporary files. Remove optional Windows components that you are not using. Remove installed programs that you no longer use.

Sunday, October 27, 2019

Comparing Measurements of the Speed of Sound

Comparing Measurements of the Speed of Sound Finding the Speed of Sound! Group Members: Jesse Jackson, Arian Harrison Abstract: To begin as stated online The speed of sound, or of acoustic traveling waves, is a physical constant for any given medium at a specific pressure and temperature( http://whatis.techtarget.com/definition/speed-of-sound). The speed of sound, or of acoustic traveling waves, is a physical constant for any given medium at a specific pressure and temperature. The experiment that was completed uses two methods in order to find the speed of sound. This speed of sound will be compared and contrasted to an accepted value that has been scientifically proven to be correct given the perfect conditions. Our two method results will be compared together in order to see which is closest to the accepted value. The first method being produced is a basic formula which uses basic knowledge in order for it to work. The second methods uses the frequency of the fork which was in this case is 512Hz and the soundwaves found in the formula. They are then multiplied together in order to find the current speed of sound. From the experiments and information given it is shown that the first method gives the more accurate result which is 350.2 m/s +/- 3.28 compared to 352.002 m/s +/- 2.27. This just proves that the first method is the most accurate when comparing to the accepted value of 340.29 m/s. Aim: To compare two measurements of the speed of sound to one accepted value. This will show which method is more accurate. Introduction: The experiment conducted used two methods in order to be able to measure the speed of sound. Both methods will be analysed and compared to an accepted value when measured at different temperatures. At -1 degrees Celsius the speed of sound is 330.4 m/s whereas at 21 degrees Celsius the speed of sound is 343.6 m/s. To begin, the first method of finding the speed employs a short simple formula based on known knowledge of the variables around you. At 0 degrees Celsius the speed of sound is 331m/s and for every degree change over 0, there will be an increase of speed by 0.6m/s. By being able to use this knowledge and the variables found in the lab during the experiment we can then substitute into the equation: V=331+0.6T. After that the second method will be used and be compared to the first one. This method is a test of resonance vibrations. This test involves finding the height in which PVC pipe creates the loudest noise of resonance when a 512Hz tuning fork is vibrating over it. By adjusting the length of the PVC pipe exposed to the water, we can measure the distance when the fork and pipe are vibrating at the exact same frequency. Once the loudest resonance is found and has been measured, based on that length from the surface of the water to the top of the pipe, the wave length can be measured with ÃŽÂ »=4(l+0.4d). Based on this information, the next method utilizes the wavelength equation and answer and also the tuning fork frequency which is 512Hz. This information can be converted into the second equation of V=fÃŽÂ ». Method: The cylinder was filled with water. The PVC pipe was then lowered all the way into the water until there was a 1cm gap from the top of the water to the top of the cylinder. My partner then struck the tuning fork and held it over the pipe as it was vibrating. The pipe was slowly pulled out of the cylinder as we listened for the position with the loudest noise. After finding the correct position the distance from the top of the tube to the surface of the water was recorded. Part A Measure the air temperature of the room. Calculate the speed of sound by using the formula V=331+0.6T. Calculate appropriate uncertainties for final answer. Part B Place PVC pipe into measuring cylinder. Connected boss head and clamp to retort stand. Positioned retort stand next to cylinder. Fill cylinder until there is a 1cm gap between the top of the cylinder and water. Hit the forks and place over the PVC pipe. Lift PVC pipe up gradually until you find the first sound. Stop, clamp it and record as accurately as possible Part C Determine the speed of sound using: ÃŽÂ » = 4(L + 0.4d), where ÃŽÂ » = wavelength, L = closed tube length, and d = diameter of the tube. V=331+0.6T V=fÃŽÂ » Risk Assessment: Equipment Needed: Hazard Details: Hazard Management Measures: 1 Litre Measuring Cylinder Falling/Breaking/Shattering Be Careful 40mm Diameter PVC pipe Falling Be Careful Tuning Forks (512Hz) Be Careful Metre Ruler Splinters Be Careful Vernier Callipers Be Careful Thermometer Breaking/Falling/Shattering Be Careful Clamp, Retort Stand Clamping Fingers Be Careful Results: 156mm +/- 0.5mm11. 156mm +/- 0.5mm 145mm +/- 0.5mm12. 156mm +/- 0.5mm 146mm +/-0.5mm13. 154mm +/- 0.5mm 158mm +/-0.5mm14. 152mm +/- 0.5mm 152mm +/- 0.5mm15. 154mm +/- 0.5mm 150mm +/- 0.5mm16. 155mm +/- 0.5mm 157mm +/- 0.5mm17. 154mm +/- 0.5mm 152mm +/- 0.5mm18. 154mm +/- 0.5mm 155mm +/- 0.5mm19. 155mm +/- 0.5mm 155mm +/- 0.5mm20 156mm +/- 0.5mm 1st Method for finding the speed of sound: V=331 + 0.6T0.5/32 x 100 = 1.5625% V=331 + 0.6 x 32 1.5625% x 0.6 = 0.9375% V=350.2m/s +/- 3.28 The speed of sound from this equation is 350.2 m/s +/- 3.28 when the temperature is 32 degrees Celsius. V=331 + 0.6T0.5/30 x 100 = 1.67% V=331 + 0.6 x 301.67% x 0.6 = 1% V=349 +/- 3.49 349 x 1% = 3.49 For the second day, the temperature was 30 degrees Celsius so it made the speed of sound 349m/s +/- 3.49 2nd Method for finding the speed of sound: ÃŽÂ »= 4(l+0.4d) ÃŽÂ »= 4(155 +/- 0.5 + 0.4 x (42.19 +/- 0.005)) ÃŽÂ »= 4(155 +/- 0.5 = 16.876 +/- 0.002) ÃŽÂ »= 4(155 +/- 0.32% + 16.876 +/- 0.01% ÃŽÂ »= 4(171.876 +/- 0.33% ÃŽÂ »= 687.504 +/- 2.27 687 +/- is the wavelength that was found V = f ÃŽÂ » V = 512 x 687.504 V = 352.002 m/s +/- 2.27 The speed of sound that was found here is 352.002 m/s +/- 2.27 Discussion: The outcome of the experiment supports my hypothesis which states that the first method is the closest result to the accepted value of speed. The results from the experiment were affected by errors and or limitations that occurred throughout the whole procedure. Human error can affect dramatically due to the fact that eye sight is not as effective as a technological reading. There are limitations to using eye site. Next humidity must be taken into account; in humid conditions water molecules are more frequent, where as in comparison to gas is travels a lot slower because the molecules are a lot less frequent. Hence why, if there is more water molecules within the air then the sound waves will travel faster because there would be a lot more water molecules present. This consequently results in a non-exact answer as the humidity is not measured on the temperature thermometer. All of the methods could off had many predicaments as well. For one the tuning forks themselves may have been s lightly off. The 512Hz fork used may not off been 512Hz due to age and wearing. Frequency is the number of times that an event occurs per unit of time. For sound the frequency is often measured by Hertz which is abbreviated to Hz. Its measured from the top of one wave to the bottom of another, per second. Humans can generally only hear from 20Hz up to 20000Hz, while dogs can hear up to 60000Hz and as low as 1Hz. Overall mishearing of the sound could have been a very big setback, this in turn goes with the possibility of false measuring, in the fact that when measuring the distance where resonance occurred the student holding the pipe would constantly move by half a centimetre or so. This means an accurate result wasnt measured and that this would further the errors in the investigation. The final result of the second method was backed up by multiple errors that occurred making the second method the less accurate of the two. There are numerous ways in order for this experiment to be more successful and to minimize errors/failures. As said before instead of having a student move the pipe up and down until resonance was heard, take advantage of retort stands and of course clamps. This would lower the possibility of error when measuring, instead of being out by half a centimetre it may be out by a few millimetres. Tuning forks may not be succinct and should undergo a pre-test to ensure that they are resonating at 512Hz because of its age and wear. This would create more accurate results as you would be finding the correct resonant soundwaves. If these mistakes were not made the errors would be less, and the experiment would have been more successful. Due to mistakes the speed of sound was not the same as the excepted value which is 340.29 m/s at sea level and at 20 degrees Celsius. Theoretically method 2 should have been the more accurate but because of mass errors it was not. The big deciding factor that was found is that humidity isnt taken into account with met hod 2, so no matter how hot, dry, rainy or sunny the weather was, it wasnt affected at all. If all errors stated above, and the temperature and humidity were accounted for then both methods should have been either very close or exact to the accepted value of 340.29 m/s. The speed of sound within water is 1484m/s. This is nearly 4 times the speed of sound in the air. This is why animals such as dolphins and whales can communicate over such long distances. Humans can only communicate at a quarter of the distance that those animals can. Â   Â   Â   Conclusion: To conclude the EI for investigating the speed of sound, it was stated that the first method would be more accurate, and this hypothesis was correct. This was supported by the results as the speed of sound at 32 degrees Celsius was dramatically more accurate than its counterpart, measuring in at 352 m/s instead of 350 m/s. This dramatic change occurred due to the fact that there is a lot more room for error in the second method. Unlike the first second method, the temperature affected the second method dramatically

Friday, October 25, 2019

Abortion is Not Murder Essay example -- Argumentative Persuasive Topic

Abortion is Not Murder Is abortion murder?   Murder is defined as "illegal killing with malice aforethought." Abortion fails this definition for two reasons. First, abortion is not illegal, and second, there is no evidence to suggest that expecting mothers feel malice towards their own flesh and blood. Not all killing is murder, of course. Murder is actually a small subset of all killing, which includes accidental homicide, killing in self-defense, suicide, euthanasia, etc. When pro-life activists call abortion "murder," they are suggesting that abortion fits the definition of murder, namely, "illegal killing with malice aforethought." However, abortion fails this definition for two reasons. First, abortion is not illegal, and second, mothers hardly feel malice towards their own unborn children. Some might object the first point is overly legalistic. Just because killing is legal doesn't make it right. Exterminating Jews in Nazi Germany was certainly legal, but few doubt that it was murder. But why do we still consider the Holocaust murder? The answer is that we hold the Nazis to a higher law. When the Nazis were tried in Nuremberg for their war crimes, they were not accused of "crimes against Germans" or even "crimes against Jews." Instead, they were charged with "crimes against humanity." The reason is because there was no legal basis to charge them otherwise. The massacre of Jews was legal under German law. So in order to punish the German leaders for clearly wrong behavior, the Allies had to evoke a higher law, a law of humanity. (1) The Holocaust was condemned as illegal, and therefore murder, because it violated this law. Many pro-life advocates claim that the same reasoning applies to abortion. Alt... ...heir legal basis is still a matter of controversy. Germany never signed an agreement of international law prohibiting genocide -- indeed, genocide was declared a violation of international law only at the Nuremberg trials themselves. In other words, the Allies retroactively applied international law to the Nazi war crimes. Ultimately, the legal basis for the Nazis' prosecution rested on the law of world opinion, or even, many claimed, the law of God. This raises many thorny questions, such as: whose opinion? And whose God? When the criminals are as obviously evil as the Nazis, then world opinion tends to be united, and there is no controversy. But what about a subject like abortion, in which the majority of public opinion is pro-choice, and on which most religions have different teachings? In this case, evoking a "higher law" becomes problematic, to say the least.

Thursday, October 24, 2019

Niels Bohr

Niels Bohr is a big person in the history of chemistry. If it wasn’t for him we would not have known as much as we do now about the atom. He came to a conclusion of so many unanswered questions people were left after the discovery of the electron. He also participated in the United State’s biggest project that helped us win World War II. If it wasn’t for Niels Bohr we probably would not have as many things as we do today. He is one, if not, the biggest person in the history of Chemistry. Niels Bohr was born around the time people started to research more about the atom. In his early years J. J. Thomson discovered the electron which would later have a big debate. During Bohr’s college days, he became a pupil of J. J. Thomson. They both began to work on the structure of the atom and trying to figure out how it works. They both started using everyone’s theories and put them together for example; he used Max Planck’s quanta theory, and used what Ernest Rutherford suggested what the atom was like. By putting these together Bohr and Thomson found out that the electrons at a certain distance away from the nucleus which were called energy levels. They also figured out that when electrons absorb energy it goes to higher energy levels moving farther from the nucleus, but when it loses energy it goes down energy levels and gets closer to the nucleus. Even though Bohr’s model isn’t 100% perfect, his model is more accurate then what others came up with. Later on though many others have improved Bohr’s model and made it more accurate. After Bohr completed his atomic model he then won the Nobel Prize in Physics for his model. Bohr got right back to work after he won the Nobel Prize and started to research atomic nuclei and learning more about them and also settled some differences in quantum physics. While he was doing this Bohr went back to his homeland over in Europe during the time World War II started. After Germany was taking over Europe he was able to flee to Sweden and then came to the United States again. In the United States he was invited to help out with the Manhattan Project. Just imagine if Bohr was not able to help out with the Manhattan Project. Where would we be during the World War II, would we have won? All of these questions come back to Bohr, because of his knowledge of an atom and his research of the atomic nuclei we were able to produce an atomic bomb. Bohr had a lot of influence in what our world is like today. If he wasn’t alive we would not have known (or would be decades behind with our researches then where we are today) the atom and how to use it. Bohr also did research on atomic nuclei which got him invited into the Manhattan Project which changed the world as we know it. This project began the nuclear weapon uses throughout the world and also ended World War II and any possible world war in the future. Because of this mostly every country has nuclear weapons and the world can end at any moment from this. Bohr has done a lot and with help from J. J. Thomson, he was able to do the things he did. Without Thomson discovering the electron, Bohr would not need to have discovered the structure of the atom because it was already known. Throughout Bohr’s life he was able to find new things out to help the world out. He might not have done it alone or 100% perfect, but he was able to find out these things and help the world out. Without him there would be no nuclear weapons, and who knows what would have happened at the end of World War II. Because of what Bohr has researched and found, Niels Bohr is one of the greatest people that have ever been involved with chemistry. Works Cited â€Å"Niels Bohr | Biography | Atomicarchive.com.† Atomicarchive.com: Exploring the History, Science, and Consequences of the Atomic Bomb. Web. 30 Nov. 2010. . â€Å"A Science Odyssey: People and Discoveries: Niels Bohr.† PBS: Public Broadcasting Service. Web. 30 Nov. 2010. .

Tuesday, October 22, 2019

Mr Van Gogh Literary Essay Essay

Owen Marshall’s short story ‘Mr Van Gogh’ is an explanation of society’s harsh attitudes towards individuals today. Through characterization, religious allusion and imagery Owen Marshall portrays Mr Van Gogh as someone who is overcoming society’s acts of judgement. This is reflected on the audience because Marshall makes us question our own behavior in the hope that we will change. Owen Marshal uses imagery, biblical allusion and characterization to impact the audience. Characterization is a key feature in the short story ‘Mr Van Gogh’. Contrasting characters determine the effects of individuals trying to ‘fit in’ society. This is shown in Mr Souness personality towards Mr Van Gogh as rude, merciless and ignorant. This is depicted in the first paragraph when Mr Souness’ relatives visit and start mocking, this is a portrayal of how this is served to illustrate to the reader the cruelty that is a common place in society. Mr Souness is a materialistic man with few morals and little acceptance for people who are ‘different’. He only talks to Mr Van Gogh in order to make fun of his passion. Despite Van Gogh’s willingness to share his passion with society, â€Å"only those who wanted to mock him, encouraged him to talk.† However Mr Van Gogh is described as a man who bases his life around his morals and values. He is passionate and simply loves beauty and life. He spends all his money on his artwork such as buying different colors for his glass, especially yellow because Mr Van Gogh said it represents personal expression. To others in the community â€Å"he didn’t have anything worth stealing† Mr Van Gogh is somewhat eccentric and often shy or submissive around others in the community. The contrasting personalities help illustrate themes of small town mentalities and beauty of being on the inside. Mr Souness singles out Mr Van Gogh because he is different, this is a characteristic or trait often associated with small towns. This is an example of how society has become materialistic and shallow. Mr Van Gogh in comparison is moral and passionate about life and beauty. He embodies the qualities which everyone should strive to abstain. Furthermore, contrasting characters are evident through the short story, these are the Parsons son, The Father, Rainbow Johnston and the Bulldozer guy. Characters like these show the true events of social marginalization in society today. From the name ‘Rainbow Johnston’ sounds so happy but names can be deceiving by their meaning already. Turns out Rainbow Johnston and his friends smashed all Mr Van Gogh’s precious valuables with no second thought of any consequences. Characterization is represented well with biblical allusion. The narrator uses biblical allusion to a great effect in order to show the audience his opinions regarding alienation. This is evident through Mr Van Gogh’s actions â€Å"arms outstretched like a cross† displaying a reference to Jesus’ crucification on the cross, supposedly for humanity’s sins. The immediate effect of this is to show the reader that Mr Van Gogh is horribly mistreated for his beliefs, just like Jesus was said to be treated in the Bible. Additionally, a second example of biblical allusion is present at the end of the text when Mr Souness rubs the dust from his eye. This is an allusion to the Book of Luke, where it talks about removing the log from your own eye before speaking out against the dust in the eye of your brother. This shows that Marshall believes that society had destroyed Mr Van Gogh before dealing with its own problems and that Marshall condemns society for this. Imagery is depicted in the short story ‘Mr Van Gogh’ to effectively demonstrate the effects of alienation on individuals. On his deathbed, Mr Van Gogh’s face is described as the â€Å"color of a plucked chicken†. This imagery of a plucked chicken is used to demonstrate the helplessness of Mr Van Gogh and how vulnerable he is. Owen Marshall uses imagery to strengthen opinions held on persecution by using strong allusions and the effects this alienation has on the mistreated. His allusion to Jesus Christ attached huge and powerful connotations to Mr Van Gogh, and the humiliation he was subjected to, while being so vulnerable himself, made the death of him and the loss of his great work even more disastrous. The description of Mr Van Gogh as a plucked chicken is used to demonstrate how persecution leaves a   person vulnerable and belittled. Mr Van Gogh has been alienated and taunted because of his passion in a subject that society can not understand and that intensity of belief is the reason of his downfall. Owen Marshall uses vivid imagery to depict Mr Van Gogh’s house â€Å"weathered stoically to an integration of rust and exposed wood† is symbolic of the man himself, who for his art, is willing to expose himself to this mocking society. Because of the completed beauty of his art behind the rough exterior, it stands for the man himself with the ‘old-fashioned’, ‘careworn’ appearance and the singular beauty of his passion. Owen Marshall distinctively describes the house as weathering and old.†The fire and life upon the walls and ceiling defied Mr Van Gogh’s drained face† Finally, Owen Marshall uses characterization, religious allusion and imagery to depict the harsh explanation of society’s attitudes towards individuals today. This reflects in the short story ‘Mr Van Gogh’ with the alienation and mocking created by society.