三等獎

近年來許多研究顯示台北的大屯山底下可能存在岩漿庫，而最近一次的噴發可能約在5000年前，於是我們決定利用地球物理方法對大屯山做更進一步的了解。由於磁力測勘是了解火成岩區的重要工具，而且前人對大屯山的磁力探勘似乎著墨較少，所以我們決定使用磁力對大屯山進行測勘。測區包含了公路以及步道的部分，量取資料後，我們經過一些標準的程序得到磁力異常值，再利用極化修正將資料修正得更直觀，並用修正前後的資料繪出的圖與溫泉露頭、地表岩性等做比對。最後我們利用物理方法得到相對的居里點深度，希望能進一步了解大屯火山群的地熱活動。我們研究後認為：大屯山下方的居禮點深度較深，地熱活動較不活躍，而七星山到大油坑間的居禮點深度較淺，地熱活動則較旺盛，可能有岩漿庫存在。

根據西方文獻造成狐臭的原因之一是因為Staphylococcus 將汗液中的白胺酸(leucine)代謝產生異戊酸(isovaleric)，散發出臭味，但台灣人的狐臭菌是否與西方人類似則較少被探討。 本研究透過好氧和厭氧的篩選方式篩出的優勢腋下菌種以Staphylococcus epidermidis、Staphylococcus haemolyticus、Staphylococcus lugdunensis、Micrococcus luteus、Staphylococcus aureu 為主，與國外研究結果略有不同。在Gas Chromatography (GC，氣相層析儀) 檢測結果發現以上菌種中能將白胺酸轉換成異戊酸，效果最好的菌是Staphylococcus lugdunensis，推測Staphylococcus lugdunensis為造成狐臭主因。 由結果推測，異戊酸只是臭味的一部分，未來可以藉由分析汗液成分與腋下菌的產物來找出導致狐臭的其他原因，找出更完整的腋下作用機制及更好改善狐臭的方法。

本研究發展一套熱溶劑法合成鐵硒奈米超導體，並嘗試發展出新的元素摻雜方式。由此熱溶劑法所合成之鐵硒奈米超導體具有特殊的八邊形奈米片結構，除此之外更具有20K之超導臨界溫度。接著我們嘗試以吡啶溶液對奈米片進行插層的動作，雖然插層並不成功，但我們卻由此得知20K之超導臨界溫度是由鹼金屬的摻雜所促成。故我們調整熱溶劑法的反應環境，使得結晶與摻雜兩步驟在一反應系統中同時進行，透過此方法我們成功將更大量的鹼金屬摻雜至結構當中，且能以替換鹽類的方式來摻雜不同鹼金屬，由此方法所合成之鐵硒奈米片明顯具有比原先更高的超導臨界溫度，且仍保留原有的特殊八邊形結構。最後在改善量測的方式時我們更意外的發現較大的奈米片具有不同的物理性質，在磁性量測中約40K處有明顯的抗磁訊號產生，因此我們推測特殊的奈米片也有可能是影響超導臨界溫度的因素之一。而由於本研究在製成技術及樣品性質上皆有極令人耳目一新的突破，故可望在講求能源效率的今日有所貢獻。

根據我國警政署統計，現今由於汽車駕駛人或乘客因為開車門不慎而導致的車禍致傷或致死的悲慘案例幾乎天天都在發生，嚴重影響了道路行車安全，更造成寶貴人命的無謂損失以及社會成本的慘痛付出。本研究主要目的係針對防止此類車禍一再發生，利用超音波測距模組、Arduino晶片模組做為處理系統，除現有閃燈、蜂鳴等被動裝置外，加上了主動式阻尼制動器，主動防止車門在機車騎士經過時被推開，以達到避免這種意外一再發生的效益。本研究發現採用傳統液壓式阻尼器成效良好，但是近一步改採磁性流體填充之阻尼器之成效仍有待改進。

The study aimed to compare the electricity generated from the fruit extracts of calamansi, camias and starfruit. Unripe fruits were extracted and varied percentage compositions of each extract were prepared.Wires wereconnected to a multi-tester (voltmeter or ammeter) to measure voltage or current that passes through. Results revealed, that amount of voltage and electric current generated are its lowest reading at 25% and are its highest reading at 100%. Nonetheless, of the three fruit extracts, it’s the calamansi that has the highest amount of voltage generated of0.97 volt while camias has the highest amount of electric current generated of 13.98 mA. Using ANOVA at 0.05 level of significance on the amount of voltage generated among varied percentage compositions of three extracts. However, there’s a significant difference on the amount of electric generated among varied percentage compositions. Results of ANOVA statistically signify that the three different extracts could either be used as a source of voltage and that camias extract should be preferably used over the other two fruit extracts in generating electric current. In all compositions, produced voltage is between 0.88 and 0.97 volts and current is between 3.28 and 13.98 mA. These currents produced are not enough to turn on a small light bulb having a smallest voltage capacity of 1.2 volt, but can be able to turn on a light-emitting diode (LED) that require such amount of current.

Reduction of carbon dioxide is desired as an environmental problem of global warming. The study of generation of formic acid from carbon dioxide was performed under irradiation of ultra violet to photocatalyst. Ta2O5 could reduce carbon dioxide, but the band gap of Ta2O5 was 4.0 voltage. In this research, it was found that tantalum oxide / tantalum plate responds to visible radiation. Therefore, the reason of visible light response was examined. It was studied to make efficient tantalum oxide / tantalum plate.

Pediatric cancer has an incidence rate of more than 175,000 per year with a mortality rate of approximately 96,000 per year. One major cause of this problem is late diagnosis. A novel promising way of pediatric cancer screening is handwriting analysis. This method surpasses other methods by detecting pediatric cancer in a very early stage. However, studies are still limited to manual analysis which needs an expert and a long period of time. The aim of this project is to design a computer program to extract handwriting features and build a classification model to classify the user as patient or as control. Dataset was collected from schools and hospitals where all participants could read and write in English. After data cleansing, number of samples was 440 samples. MATLAB (Matrix Laboratory) program was used for extracting geometric features in handwriting. Program was validated using a subset of 50 samples of the dataset. WEKA Package was used to test and build the classifier. Experiments were done using classifiers: Logistic, Multilayer Perceptron, J48, LibSVM, AdaBoostM1 and Naïve Bayes. Best subset of attributes was evaluated and used for each classifier and all calculations were done as the average of cross validation operations of several folds assignments. Best performance was achieved by Logistic classifier with average accuracy of 80.15%, standard deviation of 0.43% and Matthews's correlation coefficient of 0.59. Finally, this project presents a new fast, free, ready, easy and psychologically comfortable method for pediatric cancer detection while keeping suitable accuracy for mass screening.

自1930年代以來，考拉茲猜想(Collatz conjecture)一直是個未解之謎，其敘述如下：選定一個自然數，如果是偶數，則用2來除；如果是奇數，則乘以3再加1，經過有限次迭代，最後一定得到1。也就是說會得到1,4,2,1,4,2,…的數列，稱之為1-2-4循環。即使此猜想敘述簡單，卻是個橫跨世紀的難題，至近幾年才有一些證明方法出現。 其中一種證明考拉茲猜想的想法為證明所有不符合考拉茲猜想的狀況為假，而其中一種狀況為除了1-2-4循環還有其他組循環，即有些正整數在經過數次考拉茲猜想的計算後，會進入一組非1-2-4循環的循環。 因此，在此篇報告中我們透過討論每一個奇數在經由乘3再加1的計算後，所得到的偶數的2的冪次，再經由反證法證明除了1-2-4循環不會有其他組循環。

本實驗乃研究超順磁性流體薄膜在通入垂直場後磁顆粒的動力學過程，以及排列的結構、磁鍊的幾何性質。我們使用了兩種創新的方法，分別是改良傳統磁性流體製造方法，避免磁性流體因凝聚而造成干擾；另一個是除了以往以電場或顯微鏡探討磁鍊的性質，使用Rayleigh scattering以及光遮蔽的方法，以CCD量測雷射透射光強度的時變率，改變不同變因(磁場大小、磁性流體樣本厚度、磁性流體濃度)，由於其結構性質影響了透射光強度，故分析透射光強度與諸變因間的關係，並與顯微鏡下的觀察結果比較，做出磁致散射動力學過程詮釋。