The Effect of Hands Free - Cell Phone Conversation on Visual Fields
It is a known fact that using a cell phone while driving can lead to reckless driving. According to research done by the World Health Organisation (2011) thousands of car accidents occur worldwide, each day, due to cell phone use whilst driving. Many of these car accidents result in serious injury or death of drivers, passengers or pedestrians. According to the Automobile Association (2012), cell phones are the number one cause of traffic accidents in South Africa. The high rate of car accidents due to cell phone use has led to legislation being passed, in most countries, banning hand-held cell phone use while driving. Hands-free phone equipment is not prohibited as it is widely regarded as a safe means of making and taking a phone call while behind the wheel. The purpose of this study was to show that the act of talking on a cell phone and not the method of talking (hand-held versus hands-free) increases accident probability. This study used a Friedman Visual field analyser which measures subject’s visual fields with and without engaging in hands-free cellular conversation. The results showed a significant constriction of the visual fields when subjects were conversing on a cell phone. These results were and can be explained by the fact that the test subject experiences cognitive distraction. Cognitive distraction occurs because the driver has to divide his/her attention between the cell phone conversation and the tasks relating to driving. These results have significant ramifications for road safety in a driving environment.
Sustainable Graphene Oxide Support for Ruthenium Catalysts to Improve the Efficiency of the Hydrodesulfurization of Thiophenes
沙烏地阿拉伯 is the largest oil exporter in the world. 64,000,000 tons of sulfur oxides are produced every year through the combustion of organic sulfur compounds in the oil industry. This leads to several environmentally serious problems, including air pollution. This research provides a novel strategy to utilize natural-based Graphene Oxide (GO) as a support for ruthenium (Ru/GO) to functionalize as a green catalyst for hydrodesulfurization. Physical activation of camel bone samples was carried out by carbonizing them at 500oC to produce camel bone charcoal. Modified hammer’s method was employed for GO production, followed by doping of ruthenium in a simple synthesis step. The prepared catalyst has been characterized by XRD, SEM and EDX techniques. Thiophene and 3-methylthiophene were used as model compounds in the hydrodesulfurization process. The catalytic reactions were carried out at atmospheric pressure in a continuous up-flow fixed-bed quartz reactor. The composition of the sulfur containing gaseous products was analyzed by gas chromatography. The product distribution achieved for thiophene was 3-6% butadiene and 76-77% butane. And for 3-methylthiophene, it was 32.3% of pentaned 1-pentene and 2-pentene and the selectivity percentage was 45%. Ru/GO has been found to be an excellent catalyst of thiophene and 3- methylthiophene hydrodesulfurization and is a considerable improvement when compared to the commercially available catalysts. The prepared catalyst shall potentially lead to the reduction of sulfur pollution in the future. The positive effect on the environment could be substantial.
永不妥協
本文籍由一套數學遊戲的必勝方法及其背後潛藏的數學原理，來作為研究目標。透過研究德國數學家E.Sperner 提出的方法所延伸的數學遊戲，來解決潘建強、邵慰慈兩位教授留下來沒有證完的遊戲結果[1]，並將遊戲增廣至三維空間的探討且得到如下的結論：
一、平面棋盤
(1)不可換色，先下者恆勝，其最快獲勝方法，為依所下位置的三角形衍生子圖周界走。
(2)可換色，獲勝規則由棋盤的總頂點數決定，若棋盤的總頂點數為奇數，先下者獲勝；若棋盤的總頂點數為偶數，則後下者獲勝。
二、空間棋盤
(3) 不可換色，先下者恆勝，而最佳下法，則是下在大四面體本身內部的某一點，且其最快獲勝方法為，依正四面體稜邊所下位置走。
This study is mainly about an invincible method of a mathematical game and its theory from which it is derived. We want to solve the problems left by Professor Poon, K.K and Professor Shiu，W.C. and meanwhile extend it into three dimensions through the method brought up by E. Sperner[1].
On two dimensional case, the first player will win the game forever on condition that these two players can't change their chesses colors at will. And the fastest way to win will be just putting the chesses that along the baby triangle boundaries. If both players can change their chesses colors randomly, count the chesses number before starting the game. It is calculated that if the number of the total chesses is odd, the first player will win the game in normal and logical circumstances. On the contrary, if the number of total chesses is even, the latter will win.
On three dimensional case, the first player will definitely win the game without allowing changing chesses colors. And the best strategy is putting chesses in the inner of the big tetrahedron; what’s more, going along the edge of the tetrahedron will be shortest way to win the game.
FABRICATION AND CHARACTERIZATION OF CARBON NANOTUBE DOPED PHOTOVOLTAIC CELLS
Nowadays, the increase in population and the rapid depletion of nonrenewable energy sources brings the need for energy. In this case, scientists are forced to develop technologies by using renewable energy sources. Sun is the unlimited and renewable energy source. Organic solar cells absorb the light from the sun by the active polymer layer and transform it into electrical power. Organic solar cells are advantageous than inorganic ones because of being low-cost, easy-to-use and proper for large scale applications. In this project, it is aimed to produce organic solar cells by using specific amounts of carbon nanotube (CNT) doping. According to this aim, it is detected by using the fluorescence spectroscopy that CNTs can be used in organic solar cells. Later, the homogenous distribution of doping SWCNT into donor material was displayed by AFM, and correct proportion of SWCNTs are chosen by those images. In order to increase the efficiency of organic solar cell SWCNT doped P3HT was used as donor molecule. The acceptor molecule was PCBM in here. Surface characterization of prepared samples was made by Atomic Force Microscope (AFM), while electrical characterization of them is done with airless environment cabin (glove-box) system in nitrogen environment. As a result, devices prepared with addition of cyclohexanone in P3HT: SWCNT%:PCBM new load paths to carbon nanotubes were provided, as a result of the measurements short circuit current obtained was raised from the reference to 53%. The best yields were found as 2.24% in 0.2% SWCNT doped devices. This result shows efficiency is healed according to the reference rate as 64%. In this study, certain amounts of carbon nanotube doped organic solar cells were produced, which are highly efficient rather than traditional organic solar cells and low cost, easy-to-produce rather than inorganic solar cells, by using environmentally friendly materials.
電梯問題
本研究主要是研究「電梯問題」： 令某棟建築內任兩層樓都至少有一部電梯連接的建築稱為全能建築，若某棟建築內有m部電梯，每部電梯停n層，f (m, n)為使這棟建築成為全能建築的最高層數。對於不同的m, n，f (m, n)的值為何？ 本研究一開始先以一些參考資料為基礎，試著整理出其中未完成的部份。接著，我們針對了一些個別的f (m, n)，具體求出其值。令某棟建築內任兩層樓都恰有一部電梯連接的建築稱為完美建築，我們引入了一個新的函數g (n, k)=m，得到了一個與完美建築有關的定理。另外，我們還利用一些構造方法，求出了所有g (3, k)的值。 在這次的研究中，我們成功運用了各種不同的構造手法，得到了一些相關的結果。至於是否能將這些構造方法運用在求出一般的f (m, n)之值？這是我們將繼續探究的課題。
Auto-control water consumption System
By saving water you are saving lives including yours. All of us know that water is an invaluable and priceless gift. We can’t dispense it. The consumption of water differentiate from one country to another, we may use over quantities of water, in other countries people are thirsty living under the limits of poverty .It’s very important for agriculture, industry even human animals and plants can’t live without water. But people are careless, they consume a huge quantities of water in shower, washing car, gardening…. So that we thought to make this brilliant project F.W.S (frugal water system). This system is connected with you mobile phone by an application that shows you your water consuming and makes you control it. It record in every minute your consumption. This control system helps us to preserve water for the future generation. Besides, it tells you the price that you will pay and warns you if you pass the quantity of water that you should consume in a defined period. So you can also save your water bill. So we have to make this project works to let every person know that he is doing squandering water. With this system we can save planet resources of water. Finally, the water is as precious as our lives and with frugal water system, we will be able to monitor and control our water consumption. Also be alerted in the event of a leak or flooding. This project helps us to preserve water, reduce and avoid over-consumption. So we have to stand together against water squandering by making this project works.