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多邊形面積平分研究

一線段可以平分,即這線的中點;一角可以平分,即這角的平分線,這都是基本作圖。我們隨即想到一個三邊形、四邊形、五邊形,甚至可推廣到 n多邊形也應可以平分,也就是作一直線,把面積二等分。以下就是我們粗淺的討論過程。

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人造雨滴之觀測

土粒從原來結合的位置,受雨水、風等動力之作用 ,被分離而移動到另一位置,這穢現象叫土壤沖蝕( Soil Erosin)。土壤沖蝕是世界上農業方面最嚴重均問題,不但是土壤及水的損失‘且污染並淤填河川、水庫,使植物生長所需養分隨之流失,直接、間接地危害到國計民生並損及人民生命安全。台灣地形特殊,雨水集中,沖蝕及淤積現象特別可怕,面對這嚴重問題,而地球科學中有關這些教材甚為缺少,爰進行研究,俾能有所貢獻。因降雨對土壤沖蝕能力是決定於雨滴大小、下降速度及總雨量,對自然雨滴觀測,宜先以人造雨演為觀測對象,是以本研究主吹研究內容如下。

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天空之城耐震設計與隔震技術之探討

我們的研究包括兩部份,第一部份是實地調查訪問。瞭解地震成因、傷害及現有防震方法,並調查坊間各種建築物類型,及常見私自改變建築物結構現象,做為研究的基礎。第二部份為建築物抗震實驗。研究發現:牆面挖空、頂樓加蓋、樓層挑高,建築物會在該處產生弱點,由此斷裂。柱子數量相同下,散開時支撐力較弱。不對稱建築物遇震時會不自然扭轉且易倒。隔震素材恰當,能有效提高耐震力。滑軌、彈珠隔震效果很好,但位移太大,為實際建築所不容許。建物下加裝阻尼材料,能吸收部份地震能量,降低地震對建築物的危害,並有效控制位移問題,是良好的隔震素材。樓頂加裝消能設施亦能減震,但設計極其不易。 The research includes two parts. In the first part the work is concentrated on on-site visiting and investigation such as understanding the cause of earthquake, the damage and the preventive method currently available, investigating the different types of building and the phenomenon of altering the structure of an existing building without permission by government authorities which is popularly seen in Taiwan. These are considered as the basis of the research. The second part is the experimental study of earthquake resistance of a building. The test results showed that weak-point can be caused at the place where the existing wall is moved or an extra building is attached to the roof or the structure of building has extended space between floors, and fracture always occurs at the weak-point. If the number of columns of a building is the same, then the scattering arranged location of columns is weaker than concentrating type of arrangement of columns. The building having unsymmetrical structure will twist in uneven fashion that causes the building apt to collapse in case of earthquake. Employing proper vibration-absorption material can effectively increase earthquake resistance. Sliding rails and balls can provide satisfiable vibration-isolation effect, but can also cause too much displacement of building structure. Install damping material beneath the building can absorb part of the energy of earthquake, and decrease the damage, and can solve the problem of displacement of building, therefore, damping material can be considered as an ideal vibration-isolation material. Install energy-attenuation equipment can also reduce vibration but the design of the equipment is extremely difficult.

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坐升降機

二月十五日那一天,我和媽媽到高雄大統百貨公司,乘坐「升降機」到十樓一一兒童樂園,當升降機突然起動向上升時,我到好像有一個力量將我向下拉了一把,使身體沉重的向下一頓;而當感覺升降機突然停止時(或下降)卻覺得身體漂浮起來,好像是有一個力量把我往上提呢!!,這一拉一提的力量是從何而來?為什麼會這樣?難道說在升降機中人的體重會增加或者減輕嗎?果真如此,這又是什麼原因?這一連串的疑問,激起了我探討研究的興趣,於是在科學研習的時間,提出來向老師請教,老師就以「坐升降」為題口,展開這次的研習活動。

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利用廢棄豆渣製作生質柴油之研究

本研究利用廢棄的豆渣,改良油脂萃取之製程,有效降低生質柴油之原料與製作成本。由相關文獻顯示,豆渣中的粗脂肪含量約17.34%,我們覺得有回收再利用之價值。我們想以較節能的製程萃取豆渣中的油脂。首先,豆渣最佳乾燥條件是105℃熱風乾燥4小時。接著,以自製間歇式震盪裝置,節能且有效縮短油脂萃取時間。此外,我們以自製的銅管冷凝裝置,可使正己烷回收率可高達98.36%,不僅大幅提高正己烷回收率,同時有效解決玻璃易碎及水資源浪費的問題。最後,我們將豆渣中萃取出的油脂,順利製造成生質柴油,由實驗結果顯示,廢氣測試值與其它柴油大致接近。因此,利用廢棄的豆渣製製作生質柴油是可行的。

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Anaerobic Respiration: A Novel Bioelectrochemical Copper Recovery System?

Increasing concentrations of copper in discharged effluents pose hazards to aquatic food chains. This project aimed to develop a self-sustained copper remediation system based on electrical and microbiological principles. The production of electrons during yeast fermentation was investigated to catalyze the reduction reaction of dissolved copper ions. An electrical circuit was designed to harness electrons produced from either a pure or mixed culture of yeast, and were compared for voltage outputs. This system utilized a combination of carbon cloth and copper wire as the electrodes, and a magnesium sulfate based electrolyte. The better-performing cell was subjected to copper reduction analysis, in which various initial concentrations of copper were examined. Further data analysis was carried out on the voltage outputs achieved with both the mixed and pure cultures of yeast, in which an average base line was established and voltage flunctuations were compared to that of the base line. In this way, it was possible to determine the amount and severity of each voltage flunctuation — thus demonstrating whether mixed or pure cultures of yeast produced more stable outputs. Throughout the experiment, self-constructed equipment, including arduino microcontroller moderated incubators and drip-feed systems were implemented to maintain an optimum yeast growth rate. It was found that mixed yeast cultures produced smoother electrical potential outputs in response to feeding and stress intervals. The copper recovery experiment was therefore conducted using the mixed culture. Through a series of conductivity measurements indicative of copper concentrations, metal recovery was successfully demonstrated. Trend line analysis indicated similar flunctuations between voltage output and copper recovery rates, demonstrating how copper was recovered as a result of electrons harnessed from the yeast culture. These findings can be applied to the development of an energy efficient and cost-effective copper remediation system for contaminated water effluents.

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探網取霧-影響捕霧網集水特性之探討與應用

我們好奇影響捕霧網集水過程因素為何?使用超音波霧化器搭配風扇模擬霧氣,在壓克力箱中放置捕霧網進行實驗。秤量製霧箱所消耗的水,配合捕霧網集得的水量,即可得回收率。實驗結果為①三種不同材質網子中,疏水性高的不鏽鋼網回收率較佳。②不同網目單一網孔最短邊長度大於0.5mm時,網目多會增加回收率:24目較16目高出6.7%;網孔過小,會降低回收率,複雜編織的針織遮光網亦相似。③長形的網孔或複雜編織的網子,架設方向會影響集水效果。垂直向長度大於水平向,有利水珠滑落,能提升集水效果,最高可增加約5%。④使用疏水塗料塗佈在垂直向的網線上,間距2.7mm,可提升7.5%的回收率。高集水效能捕霧網具備吸附霧氣多、水珠增長時間短及滑落速度快的特性。

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新鮮大蒜液抑制Ehrlich腹水癌細胞生長之研究

患有腹水癌之 ICR小白鼠以新鮮大蒜液注射於腹腔或皮下,其癌細胞生長受到明顯的抑制。其中腹腔注射效果為皮下注射者之1.68倍。但其細胞密度不受大蒜液的影響。活體外的試驗顯示,大蒜液對腹水癌細胞核酸皮蛋白質的合成亦具有抑制效果。由其經時反應試驗發現,抑制作用為即發性,而不具潛伏相。腹水癌細胞在反應零時加入大蒜液培養 15 分鐘後,DNA , RNA 及蛋白質的合成立即受到顯著的抑制;待培養 60 分鐘,其抑制效果已緩減。該現象顯示,受大蒜液損壞的癌細胞可能具有修復的能力。

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冷熱圓舞曲

將自然環境中冷與熱的作用以簡化的條件與方式呈現並進行實驗觀察與紀錄,實驗中研究冷熱空氣量、溫度與雨量的關係。接下來,為使海洋中不易觀察的洋流顯現,亦從基礎開始實驗,探討冷熱對流體的影響,了解流體受冷受熱後的變化,再進一步以仿洋流的方式探討冷暖洋流行進基本模式,最終,再驗證「明天過後」冰層截斷洋流的現象。

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Yahoo!喝牛奶不再拉肚子了

當人體缺乏乳糖?時,未被分解的乳糖在小腸中產生吸水作用,於是發生水瀉的情形;到了大腸更會被細菌分解、發酵,產生大量的乳酸、二氧化碳及氫氣,使人腹脹、放屁,還會使腸道蠕動過快,誘發痙攣腹痛以及腹鳴,稱之為「乳糖不耐症」。乳糖?會將乳糖分解為葡萄糖和半乳糖。我們利用尿糖試紙測量葡萄糖的含量,以進一步瞭解乳糖?分解不同乳品中乳糖之情況以及模擬消化系統中不同酸鹼質環境,觀察乳糖?的作用是否受到影響。結果發現不同乳品在添加乳糖?後,葡萄糖含量隨時間而增加,而乳糖?在模擬胃中酸鹼值為2 之牛乳中完全失去活性,無法分解乳糖。

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油來油去,油成愁---建構油水分離槽模型

本校水溝中常出現油脂和菜渣,造成水污染。因此,我們利用油會浮在水面上的現象,並透過對槽的數目、排水管長度、排水管裝設的高度、排水管到出水口的距離、排水管的個數、油水的溫度、沙拉脫的使用、油水比例等各種可能影響油脂截留的因素進行探討,而設計了油水分離槽來截留油脂,並觀察實際運用於學校的情形。經由本實驗結果,油水分離槽確實能夠達到油脂截留的效果,而此油水分離槽模型,每秒可處理的污水約 16.6 ml/sec,有效率可達 97%以上,當應用於其它設施的污水處理時,可依需求,以此模型為依據,放大比例使用。

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Geo Air

1. Purpose: The purpose of this project was to design a theoretical tempered-air system to be integrated into an existing heating system in a home equipped with an air-to-air heat pump. This was to overcome the cost and environmental challenges of heating in cold climates as well as provide an environmentally friendly air-conditioning system in the summer at little to no cost. 2. Procedure: In the winter of 2010 an underground high-density polyethylene (HDPE) pipe (10cm diameter, and 30.5m length) was buried 2.5m underground around the footings of a new residential project. A fan with a flow of 3.4m³/min was attached to the pipe outside, and used to push air underground through the pipe and into the house. The ambient and incoming air temperatures as well as the date and time were recorded daily using a temperature probe with an error margin of ±0.1ºC throughout the summer and winter seasons of 2011. This data was then plotted and analyzed. A number of options to best extract thermal energy for potential use for heating and cooling were examined. Design components were selected to create an air chamber for an air-to-air heat pump to increase its coefficient of performance (COP). 3. Data: Graph 1 Graph 2 Winter Graph (Graph 1): The blue line represents the outdoor ambient temperature and the orange line represents the temperature of the tempered air. These are both arranged chronologically. The grey lines represent one standard deviation on either side of the incoming temperatures. The ambient temperatures vary dramatically, while the incoming temperatures remain quite stable. The lowest recorded temperature was about -9.0ºC, at which point the temperature exiting from the underground pipe was about 10.5ºC. Summer Graph (Graph 2): With dramatically varying ambient temperatures, the temperature of the incoming air consistently stays between 11.1 and 16.2ºC. The highest recorded outdoor temperature was about 30.0ºC, while the incoming temperature at that point was about 15.5ºC. This cold air was used as air conditioning.

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