Browsing by Issue Date, starting with "2018-06-05"

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交大e-News第256期-同行致遠為世界之光
(2018-06-05)
國立交通大學秘書室
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Secretariat
社區的驕傲──獅潭新店八音班「真樂軒」
(國立交通大學傳播與科技學系, 2018-06-05)
林梓琦
「真樂軒」成立於2009年，目前由獅潭鄉新店村樂齡學習中心與新店社區發展協會共同承辦，不同世代的廿名成員齊聚一堂，演奏古老的客家祭典、喜慶音樂，成為獅潭鄉新店村的驕傲。
陳淑賢的戲曲說唱、活化歷史──以熱情與生命注入在地文化
(國立交通大學傳播與科技學系, 2018-06-05)
林梓琦
在獅潭鄉投入文化傳承與教育工作超過三十年的陳淑賢，除在獅潭國小任教客語課程外，亦在提供高齡人口終身學習機會的「樂齡學習中心」開班授課，教學戲曲說唱藝術。
Comparative study for convective heat transfer of counter-flow wavy double-layer microchannel heat sinks in staggered arrangement
(2018-06-05)
Shen, Han
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Zhang, Yingchun
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Wang, Chi-Chuan
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Xie, Gongnan
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機械工程學系
This study proposes a modification of double-layer Microchannel Heat Sinks (DMHSs) into wavy configuration with swap of upper and lower layer design. The design can effectively improve the comparatively low cooling effectiveness at the upper layer, yet the swap of flow can promote re-developing of flow field and heat transfer accordingly. Both parallel and counter flow arrangements of the proposed configurations are examined in details. It is found that the staggered wavy DMHSs with opposite amplitude shows superior heat transfer enhancement. Regardless of the types of heat sink being investigated, the maximum temperature for all parallel flow arrangement always occurs at the exit while the maximum temperature for counter flow is in the interior of heat sink but is close to the exit. Interestingly, the swap design of counter flow arrangement (parallel channel or wavy) shows two maximum temperatures in the first and second half of the heat sink. Basically, the counter flow of straight staggered DMHS has the best overall thermal performance among the counter flows of straight parallel DMHS, synclastic wavy staggered DMHS and opposite wavy staggered DMHS. This is because the wavy staggered DMHS incur more pressure drop and pumping power accordingly.
精油的提煉過程和保存方法
(國立交通大學傳播與科技學系, 2018-06-05)
黃俊軒
精油提煉最主要的方法就是蒸餾法，精油正確的保存方法是放入遮光瓶中，並在冷暗場所保存。
Evacuation simulation with consideration of obstacle removal and using game theory
(2018-06-05)
Lin, Guan-Wen
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Wong, Sai-Keung
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資訊工程學系
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Department of Computer Science
In this paper, we integrate a cellular automaton model with game theory to simulate crowd evacuation from a room with consideration of obstacle removal. The room has one or more exits, one of which is blocked by obstacles. The obstacles at the exit can be removed by volunteers. We investigate the cooperative and defective behaviors of pedestrians during evacuation. The yielder game and volunteer's dilemma game are employed to resolve interpedestrian conflict. An anticipation floor field is proposed to guide the pedestrians to avoid obstacles that are being removed. We conducted experiments to determine how a variety of conditions affect overall crowd evacuation and volunteer evacuation times. The conditions were the start time of obstacle removal, number of obstacles, placement of obstacles, time spent in obstacle removal, strength of the anticipation floor field, and obstacle visibility distance. We demonstrate how reciprocity can be achieved among pedestrians and increases the efficiency of the entire evacuation process.
CdS/CdSe co-sensitized brookite H:TiO2 nanostructures: Charge carrier dynamics and photoelectrochemical hydrogen generation
(2018-06-05)
Chang, Yung-Shan
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Choi, Mingi
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Baek, Minki
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Hsieh, Ping-Yen
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Yong, Kijung
In this study, we have synthesized CdS/CdSe co-sensitized brookite TiO2 nanostructures with hydrogen doping (H:TiO2/CdS/CdSe) in a facile solution reaction and studied their PEC performances. Compared to undoped brookite TiO2, the H:TiO2/CdS/CdSe composites exhibit much enhanced photocurrent generation, which originates from the improved charge transfer kinetics endowed by hydrogen doping and sensitization. Time-resolved photoluminescence (PL) and electrochemical impendence spectroscopy (EIS) are employed to explore the charge transfer dynamics between sensitizers and TiO2 and charge carrier kinetics at the semiconductor/electrolyte interface. According to the analytical results, sensitizations of TiO2 are found to enhance the charge separation efficiency. Besides, the hydrogen doping into TiO2 generates oxygen vacancy states, providing additional charge transfer pathway and prohibiting charge recombination, beneficial for enhancing the PEC performances as well. Based on the charge dynamics data, we further develop charge transfer models for TiO2/CdS/CdSe and H:TiO2/CdS/CdSe. The findings from this work can help understanding the charge transfer dynamics in brookite TiO(2)based composite systems as well as designing versatile photoelectrodes for solar energy conversion.
Analysis of Leakage Current Mechanism for Ni/Au Schottky Contact on InAlGaN/GaN HEMT
(2018-06-06)
Lumbantoruan, Franky
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Wu, Chia-Hsun
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Zheng, Xia-Xi
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Singh, Sankalp K.
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Dee, Chang-Fu
The gate leakage mechanism for InAlGaN/GaN high electron mobility transistors (HEMTs) is systematically studied using temperature-dependent gate current-voltage characteristics. The electric field across the barrier layer is calculated through the extracted polarization charge and dielectric constant of the InAlGaN/GaN HEMT. The gate current of the InAlGaN/GaN HEMT is analyzed by fitting the experimental data using Themionic Emission (TE), Poole-Frenkel (PF), and Fowler-Nordheim (FN) tunneling. The results show that 1) reverse leakage current in the thin InAlGaN barrier layer is dominated by FN tunneling due to triangular barrier formation; 2) for thicker barrier layer, the reverse leakage current at low electric field (<2.23MVcm(-1)) is dominated by PF emission; 3) at high electric field near the threshold voltage the FN tunneling dominates. Extraction of effective barrier height by fitting the experimental data with models leads to the suggestion for the improvement of the device leakage current.
An integrated experimental and theoretical reaction path search: analyses of the multistage reaction of an ionized diethylether dimer involving isomerization, proton transfer, and dissociation
(2018-06-07)
Matsuda, Yoshiyuki
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Xie, Min
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Fujii, Asuka
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應用化學系
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應用化學系分子科學碩博班
An ionization-induced multistage reaction of an ionized diethylether (DEE) dimer involving isomerization, proton transfer, and dissociation is investigated by combining infrared (IR) spectroscopy, tandem mass spectrometry, and a theoretical reaction path search. The vertically-ionized DEE dimer isomerizes to a hydrogen-bonded cluster of protonated DEE and the [DEE-H] radical through barrierless intermolecular proton transfer from the CH bond of the ionized moiety. This isomerization process is confirmed by IR spectroscopy and the theoretical reaction path search. The multiple dissociation pathways following the isomerization are analyzed by tandem mass spectrometry. The isomerized cluster dissociates stepwise into a [protonated DEE-acetaldehyde (AA)] cluster, protonated DEE, and protonated AA. The structure of the fragment ion is also analyzed by IR spectroscopy. The reaction map of the multistage processes is revealed through a harmony of these experimental and theoretical methods.
Plants send small RNAs in extracellular vesicles to fungal pathogen to silence virulence genes
(2018-06-08)
Cai, Qiang
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Qiao, Lulu
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Wang, Ming
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He, Baoye
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Lin, Feng-Mao
Some pathogens and pests deliver small RNAs (sRNAs) into host cells to suppress host immunity. Conversely, hosts also transfer sRNAs into pathogens and pests to inhibit their virulence. Although sRNA trafficking has been observed in a wide variety of interactions, how sRNAs are transferred, especially from hosts to pathogens and pests, is still unknown. Here, we show that host Arabidopsis cells secrete exosome-like extracellular vesicles to deliver sRNAs into fungal pathogen Botrytis cinerea. These sRNA-containing vesicles accumulate at the infection sites and are taken up by the fungal cells. Transferred host sRNAs induce silencing of fungal genes critical for pathogenicity. Thus, Arabidopsis has adapted exosome-mediated cross-kingdom RNA interference as part of its immune responses during the evolutionary arms race with the pathogen.
食物「Why」送
(2018-06-10)
陳映瑜
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林育平
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范瑀真
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馮瑜庭
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王沛軒
近年來，食物外送電子商務蓬勃發展，雖然台灣尚未普及，但將來的發展指日可待。
關於化妝　女人何苦為難女人
(2018-06-10)
簡梵軒
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Department of Communication and Technology
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傳播與科技學系
【化妝、性別與社會】專題

社會往往對女性外表有許多要求，其中化妝更是時常引起爭辯的焦點。但有時砲火最烈的卻是純屬女性的場合，為何女性會有「內鬨」的情形發生呢？
外送APP大解密
(2018-06-10)
王沛軒
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賴昀君
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Department of Communication and Technology
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傳播與科技學系
【食物「Why」送】專題

用動畫圖表帶讀者解開目前台灣三大食物外送APP：「UberEATS」、「Foodpanda」與「Honestbee」的外送疑慮！
天燈究竟去哪裡了？
(2018-06-10)
吳佩芸
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Department of Communication and Technology
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傳播與科技學系
【天燈施放　傳統文化與環保的角力】專題

透過動畫帶領讀者了解天燈施放後的去處及處理方式。
外食文化與食安危機
(2018-06-10)
簡嘉瑩
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Department of Communication and Technology
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傳播與科技學系
【食物「Why」送】專題

你多久吃一次外食？一週？兩週？或是每天？「外食」已經成為台灣人民生活中不可缺少的一部份，跟著本文一同探討外食族形成的原因、帶來的商機，以及外食背後潛在的食安風險。
台灣出版產業現況
(2018-06-10)
戴淨妍
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Department of Communication and Technology
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傳播與科技學系
【紙本書與電子書】專題

透過圖表說明台灣圖書出版的困境與變化。
網紅經濟正夯　人氣成買氣
(2018-06-10)
黃珮瑄
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Department of Communication and Technology
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傳播與科技學系
【人人都能當網紅？網紅勢力起飛】專題

網紅經濟當紅，網紅是如何賺取收入的呢？而企業品牌又為何愛用網紅經濟呢？
僑生畢業後　人生十字路口
(2018-06-10)
關子茵
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Department of Communication and Technology
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傳播與科技學系
【僑生面面觀】專題出社會工作是每個人的必經階段，而當結束了學習生涯後，要面對的就是工作這一環。僑生的處境看似有很多選擇，但實際又該如何應對？又有什麼要考慮和注意的呢？
誤打誤撞　闖入健康
(2018-06-10)
楊佩臻
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Department of Communication and Technology
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傳播與科技學系
【飲食與健康】專題

透過採訪健康食堂創辦人黃學禮，帶領大家了解創建的過程與相關理念。
校園美食外送夯　學生新選擇
(2018-06-10)
林育平
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馮瑜庭
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Department of Communication and Technology
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傳播與科技學系
【食物「Why」送】專題

美食外送風氣日盛，校園也吸引業者及學生創業推出專屬校內的外送平台，雖然是一股商機，但同時也面臨不少困境。