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超效!太陽能板!

現在地球面臨到資源不足、溫室效應等環境問題,太陽能的利用顯得越來越重要!如果能夠找到一種更省錢利用太陽能板的方法,相信會對太陽能的利用有更大的效益!於是,我便想要研究:如何能夠省錢的使用太陽能板發電的方法!我進行了六個研究,分別得到了以下結論:1.陽光直射時發電效果比斜射強。2.離太陽燈越近,電流越高,電壓也越高,電功率也越高。3.當鏡子越多時,發電功率越高。最高可達 3.44 倍。4.加裝火鏡時,發電功率會變高,最高可達?2.18?倍。5.加裝兩片鏡子後可省下 71.8%成本!加裝一片火鏡後可省下 45.7%成本!最後,自己設計出省錢有效的「超效!太陽能板」。其發電倍數最高可達原本的 2.22 倍!你看,是不是很有經濟價值呢!

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四驅車的驅動馬達之線圈電阻的發熱研究

在日常生活中我們有許多家用或實驗用電器用品,我們發現這些電器用品有一個共同的毛病,就是如果機體過熱的話,就會停止運轉。四驅車就是一個好例子,當它跑軌道有一段時間後,車子的馬達就會發熱,跟著車子就越來越慢,再來就不動了。我們對四驅車馬達線圈發熱車子就越來越慢,甚至於不動了之問題相當有興趣,故擬探討四驅車當車的核心因素。

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The Solution to Global Water Pollution?

The waters of the Benguela, the Atlantic Ocean off South Western African shorelines, are amongst the most productive in the world, supporting prolific marine life. However despite the abundance of animals, survival in this marine ecosystem is not always easy. Oxygen-deficient bottom water, often containing toxic hydrogen sulphide, is a feature of the northern Benguela coastal upwelling system. Here, superfluous cells from excess phytoplankton production, decay and sink to the bottom to form the oozy diatomaceous mud belt sediment off the Namibian coastline. Within this diatomaceous mud further intensified decay takes place to form toxic hydrogen sulphide in the sediment. Sporadically large amounts of the hydrogen sulphide are released into the water column, causing the deadly annual "sulphur" events, as they are locally known in Namibia, to take place. Sulphur eruptions result in the deaths of thousands of marine animals. This marine system off the Namibian coast, with its harsh natural conditions of hydrogen sulphide and low oxygen, is similar to an ecosystem suffering intensive marine pollution. These natural conditions of the Benguelan waters are closely related to the conditions of many coastal areas suffering from the global marine pollution problem, created by man all over the world, through the discharge and disposal of wastes, such as nitrate fertilisers, sewage and biological decay material. A specialsed group of bacteria known as sulphur bacteria occur within the sulphidic conditions of the sediments. Sulphur bacteria actually use some of the produced toxic hydrogen sulphide in the sediments, converting it to harmless elemental sulphur micro granules in their cytoplasm. Where no other life occurs, due to the harsh conditions unfriendly to most marine lifr, sulphur bacteria thrive. Sulphur bacteria control and decrease the amount of hydrogen sulphide, which goes from the sediment into the water, through their complex metabolic systems. The biggest and most effective sulphur bacteria, only found off the Namibian coast, were dubbed Thiomargarita namibiensis. Thio means sulphur and namibiensis refers to its occurrence in Namibia. This giant sulphur-eating microbe is the earth's biggest known bacterium, visible to the naked eye. I conclude with a personal hypothesis to suggest a solution to global water pollution by utilising this magnificent bacterium. Through bacterial cultivation and processing Thiomargarita namibiensis could be employed in tacking extent of global marine pollution. The bacteria use toxic hydrogen sulphide as "fuel" for their metabolism and nitrate as an oxidizing agent, to produce harmless sulphur granules. This explains the bacteria's effectivity in removing nitrate and hydrogen sulphide wastes, the forms most biological wastes eventually occur in, from the water. This spectacular process, as it occurs within these magnificent "sulphur pearl strings", could be the sensational answer to the regeneration of polluted marine waters on a worldwide scale. This absolutely natural treatment of the water would not bear any harmful consequences such as those artificial treatment leaves behind. Sewage treatment or denitrifying treatments applied by man on polluted water leaves chemical discharge and damage to affected ecosystems. Especially Thiomargarita could be used in the regeneration of rural and urban waters (should those survive in fresh water)and sewage schemes as well as most marine waters, due to its high effectivity in removing hydrogen sulphide from affected water. It is not the solution to global water pollution to fight chemicals with chemicals. Nature has provided an excellent and valuable resource that could enable absolute natural recovery within polluted marine ecosystems. We should dedicate ourselves towards such magnificent discoveries and help nature help itself. Research on these Sulphur bacteria(especially Thiomargarita namibiensis)is very recent and ongoing. I recently enjoyed the privilege of a 24 hour marine research ship cruise off the Namibian coast with marine biologists from the Namibian Ministry for Fisheries and Marine Resources, to obtain mud cores holding Thiomargarita namibiensis bacteria. Several chemical tests are done and biological reactions are studied to collect the necessary data concerning Thiomargarita namibiensis. The discovery of Thiomargarita namibiensis awoke worldwide scientific excitement and interest. Its application to solve the problem of global water pollution would be a spectacular scientific breakthrough for the human race.

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一些Moire patterns 的數學性質研究

Moire 為法文,其英譯為watered, 是古代織布技術的一種應用;將印有規律條?的透明薄片重疊時,稍微移動或轉動其中的一片,會形成極大的圖形變化,稱為moire pattern本作品針對三個moire pattern 的數學式加以推導:(一)、兩張透明片各印有等間隔平行線,轉動其中一片使兩線的夾角θ,亮紋垂直距離和暗?垂直距離的比值為tanθ/2tanθ 。(二)、兩張透明片各印有輻射線,重疊後行成圓系,可由代數或幾何加以證明,利用三角函數可推導出此圓系方程式為:x2+{y-rtan[π/2-(θ-?)]}2)]}={rsec[π/2-(θ-?)]}2)]}\r \r (三)、透明片A 印有等間隔平行線,B 印有符合高斯曲線的平行線,AB 重疊時,形成一系列的高斯曲線,AB 的夾角減少時,會增大曲線的曲率,我們進一步討論曲線的曲率和平行線斜率的關係。Moire is the French word “watered” and refers to an ancient technique employed in cloth making. The moire occurs whenever two or more transparent sheets with periodic strips on them are superposed. The characteristic of moire patterns is the fact that a slight shift of sheets will create dramatic alternations in the observed patterns. In the present report, We derive the equations of three different moire patterns. First of all, take a sheet with equal spaced straight lines and placed it on top of another identical sheet. They are made to intersect and form an angle of θ. As the angle changes slightly, it produces huge changes in the spacing of moire fringes. We can derive a formula related to the interfringe distance. The ratio of bright fringes and dark fringes is tanθ/2tanθ.Secondly, two transparent sheets with radial lines on them are overlapped, forming a pattern similar to the lines of force between point charges. We can find that the pattern is a series of circle by means of algebraic and geometric proofs. And proven by trigonometric functions, we canconclude that they satisfy the equation :x2+{y-rtan[π/2-(θ-?)]}2)]}={rsec[π/2-(θ-?)]}2)]}\r Thirdly, a set of lines of equal spacing is overlapped with a second set of lines whose spacing are derived from a Gaussian curve. A series of Gaussian curves is reproduced in a moire pattern. Reducing the angle of intersection between the two figures steepen the curvature. We discussed the relation between the curvature and the slope of inclined lines.

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以數位像素分析法探討兩棲類變色行為之研究

本研究是以數位科技改良生物實驗上的傳統比色法,並探討中國樹蟾及台北樹蛙的變色行為。有些兩棲類有變色行為,這是眾所皆知的現象,過去一向採用比色法判斷生物體的體色變化;然而,以人眼去測定色差,會有相當大的主觀誤差。本研究及是探討以數位科技量化並比較實驗對象的變色情形。在研究過程中,用電腦量化數位相機所拍攝的影像,以像素的方式呈現出來,得以取的準確且客觀的實驗數據,並加以解析,也經由此一實驗方式,交叉比較中國樹蟾及台北樹蛙在不同環境和不同時間下的變色情形。結果顯示:樹蛙變色和環境顏色及時間有密切關係,且在短時間內以數位量化的方式解析其變色行為的方法極為可行。The purpose of this study is to investigate the color variation behavior of tree frogs using an image processing technology. It is known that some of the amphibians have the ability to change their skin color under different circumstances. In the past, a conventional “color comparison” method was frequently used whenever it comes to analyzing the color variation of organisms. However, it is realized that evaluation of color difference by human eyes is extremely unreliable. An advanced image processing technology is thus suggested to quantify the variation of skin color of tree frogs under different conditions in this experiment. Accurate quantification can be determined from the pixel number of exhibited digital images during the experiment. The color variation of different species of frogs (Hyla chinensis & Rhacophorus taipeianus) is also compared under different parameters. It is found that the color variation of tree frogs is closely related to the color of back ground as well as time. The proposed digital quantification technique has been successfully demonstrated to be an effective method for analyzing the color variation of frogs within a very short time.

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強電場下DNA穿透細胞膜的蒙地卡羅電腦模擬

去年暑假,我們從Newton雜誌得知,布洛貝爾博士(Dr. Gunter Blobel)由於發現了蛋白質如何在細胞之間運送,增進了人們對遺傳性疾病的了解,因而榮獲1999年的諾貝爾醫學獎。同為高分子鏈的DNA,在基因遺傳工程中常被用來在強電場的情況下穿破細胞膜,以進行基因的改造,其穿的物理機制又為何?在一場演講中,我們知道鍵振盪模型(bond-fluctuation model)可用來模擬高分子系統,因此我們想以之模擬DNA在強電場下穿透細胞膜的行為。

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Automatic Sterilization System for Operating Rooms?

The ASSOR is a device that allow to perform the sterilization function in hospital areas, the most important sectors of the hospital where it is required to implement this type of systems are the operating rooms, intensive cares, baby care, pathology, etc. The principle of the present project is a system that enables or either disables a valve that allows the fluid of the product, antiseptic or sterilizing, inside the room to be sterilized. The main application of this system is, after the manual cleansing of the room, in a control board, the procedure is turned on. The ASSOR consists, in general, of an electro valve that controls the fluid of the antiseptic into the room, a fan system, the electronic control circuit for the application of the product and electronic circuit to have a synchronized control of the system, and finally the product application in the target room.

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台海的冬季訪客-鯔魚洄游的研究

每年一到冬季,常常會看到新聞報導有關烏魚洄游的消息。往往在當季讓漁民有可觀的收穫。恰巧國三的地球科學課時,第四章「地球上的水」有一小段提到:「冬季時台灣海峽由於東北季風吹送,中國沿海的海流向南流至澎湖群島附近,使台灣西南海域的水溫降低,正適合烏魚習性,因此每年在冬至前後左右,大量烏魚為台灣的漁民帶來可觀的魚獲。」為什麼冬季時台灣海峽會因東北季風吹送,中國沿海的海流會南流至澎湖群島附近?台灣酉南海域水溫降低,範圍有多廣?台灣的東南海域呢?烏魚有何習性?適合的海域水溫為何?除了水溫使大量烏魚洄游至台灣西南海域外,是否還有其他的因素?.....經過老師的鼓勵和指導後,我決定把烏魚洄游的情形整理出來並試著找出疑點的答案。

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Rubik's Cube Solver

Aim: Over the years I became quite quick at solving the cube. I was keen to see if I could create a mechanical system that would do it in a similar time. Because of financial limitations and equipment I thought it impossible to achieve my usual times of around 1 minute and so settled on a target of 10 minutes. So my aim became; “To create a mechanical system that could solve the cube 100% reliably in less than 10 minutes” What I did: I started from the view that I wanted to get it to find a solution using the process that I usually use. The downside of this approach was that this approach meant that most internet research was irrelevant to my project. Also some methods I found were very sophisticated and expensive eg. the university professor who created a system to solve it in 6 seconds. I wrote software capable of solving the cube, printed out its results then testing the instruction steps by manually manipulating the cube. This was improved until 100% reliable. I then developed the user interface to input the colours on each face. The building of the hardware to manipulate the cube proved my most difficult challenge. To get the cube flipped and rotated accurately using the 5 servos. I modeled this using lego and popsicle sticks until the movements met the accuracy and reliability outcomes I needed. Surprisingly these materials held up to the challenge. Integrating the software and hardware functional models took a lot longer than anticipated to get the software instructions executed and coordinated. A great deal of fine tuning was required. Outcome: The system solves the cube 100% of the time. I was exceptionally pleased with this result in view of the lego and popsicle stick model. On reflection I have achieved a successful working model that university students have aspired to and this gives me great satisfaction. Conclusion: While the outcome is pleasing I envisaged achieving a much faster system with easier data input using camera and colour recognition software. Unfortunately time and my budget restrictions prevented this from being developed. However this is a step I am interested in implementing in the future. The speed could be improved by designing more efficient cube solving algorithms, implementing a camera with colour recognition, and possibly rethinking and redesigning my mechanical design. I would also like to Figure 1 illustrates how the air would flow through a fan, and get pushed underground in several short HDPE pipes. This tempered air would then be fed into a small, insulated air chamber built against the home that contains an air-sourced heat pump. The walls of this chamber would have small vents to balance air pressure, and an exit near the top for cooled exhaust air. When the temperature outdoors is in the coldest stage of winter (daily average of -3.0ºC), the tempered air being brought into the chamber would simulate an outdoor ambient temperature of about 10.0ºC, allowing a heat pump to operate with a COP of ~3.79 (based on data from Goodman Air Conditioning and Heating).² This means that for every unit of energy put into the heat pump, 3.79 units of energy are extracted. 4. Conclusions: In building an enclosed air chamber for around an air-sourced heat pump, it was found that it is possible to simulate a 10.0ºC climate in the coldest parts of winter through air tempering. This will allow the heat pump to run substantially more efficiently throughout the year. This system could be used effectively to heat a home in the winter, as well as cool a home in the summer.

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堆肥物硝酸鹽含量對植物硝酸鹽含量的影響

在一次上課時提到蔬菜中硝酸鹽對人體健康的影響,因此提倡有機蔬菜的好處。但學生問到:「老師!我們吃的蔬果中如果本來就有大量的硝酸鹽,那廚餘堆肥出來的肥料,再拿去種植蔬果,難道硝酸鹽就會消失嗎?」因此我們開始著手設計實驗找出答案。結果發現除了自種蔬菜以外,不論是否是有機蔬菜,都含有大量的硝酸鹽,利用水煮加熱後(不濾水)硝酸鹽含量也不會降低。之後,利用這些蔬菜堆肥後去種植綠豆及紅豆,所種植出的紅豆芽及綠豆芽內含的硝酸鹽含量也都較高,可見堆肥物硝酸鹽的含量對其植物生長後內含硝酸鹽含量是有影響的。

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Fuel Cell『電極』現場,誰看'氫'了誰?

燃料電池電極板材質、觸媒材質、電解液與質子交換膜材質等改進是近年來研究重點。本研究著重電極板表面改質並探討其產氫性能。利用電鍍(鎳)、無電鍍(鎳、金、銀)極板改質並測試產氫效率、腐蝕電位、電流密度、電壓電流特性及電化學性質。另一研究將已表面改質及未表面改質不鏽鋼板組成直接甲醇燃料電池供測試評估。研究發現,無電鍍鎳產氫效果最好,其次為無電鍍銀。表面結構分析中除鎳以外極板都相當平整,鎳上許多顆粒大大增加產氫面積。腐蝕試驗中雖無電鍍鎳腐蝕電流稍高,但整體來看,各極板腐蝕情形差異不大。另應用一簡單方法及裝置,能同時測定直接甲醇燃料電池效率、甲醇滲透速率、陽極板腐蝕速率與陰極板滲透甲醇電氧化電流密度。

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可程式化氣壓式夾娃娃機

本次試驗在設計一個氣壓式的夾娃娃機,首先運用課堂上所學習的氣壓實習與機電整合實習來規劃氣壓與電控部分部分,再利用機械原理與電腦輔助製圖來進行機械部分的設計,先把氣壓缸、氣壓夾爪與鋁擠型等元件3D 電腦化,利用3D 電腦影像來進行設計,可以讓我們更容易的掌控機具的比例,對初次設計機構的我們有很大的幫助。設計完成之後,我們也希望可以控制娃娃機的夾持的成功率,所以,設計了兩種方式來作為控制策略,首先以節流閥來控制氣壓的通過速度,結果發現,節流閥只能控制氣壓缸的出缸速度,並不能控制最後的夾持力量;第二種控制策略,利用PLC(可程式控制器)的程式來控制,結果發現,我們確實可以利用程式來控制,氣壓夾爪的點放時間和點放的次數,成功率都能夠依照我們的規劃來進行,是個又簡單又穩定的控制方式。

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