Browsing by Issue Date, starting with "2019-12-22"

Now showing 1 - 20 of 6124

台灣同志家庭想好孕？一窺《人工生殖法》的困境
(2019-12-22)
蕭蕙崎
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Department of Communication and Technology
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傳播與科技學系
【同婚過後好孕到？台灣同志家庭的生育困境】專題

同婚過後為什麼同志伴侶們還是需要耗費許多金錢與心力到國外，進行人工生殖手術呢？送子鳥要何時才能順利將孩子送到同志的家庭呢？透過圖表讓你了解在台灣同志家庭生育的現況與困境。
總編輯的話
(2019-12-22)
李芝謙
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Department of Communication and Technology
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傳播與科技學系
本期為喀報329期，共計六篇文章，包含四篇文化現象，一篇社會議題，一篇人物特寫。本期頭題為石恩亞的〈藝術是一種自由－塗鴉師吳衞仁〉，一位投身公益以及藝術的熱血少年的故事。此外，還有許多時下社會的焦點議題討論，以及傳統文化現象探討。以兼具社會關懷及客觀的角度，報導多元且貼近生活的題材。
藝術是一種自由－塗鴉師吳衞仁
(2019-12-22)
石恩亞
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Department of Communication and Technology
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傳播與科技學系
藝術是什麼？對吳衞仁來說，藝術沒有答案，更不該有框架。
全台玩透透體驗經濟哪裡有？
(2019-12-22)
王會瑄
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Department of Communication and Technology
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傳播與科技學系
【滑世代的體驗經濟】專題

身為「滑世代」的一員，你是否厭倦了日復一日活在電子虛擬世界的生活？本篇指南將帶著你跨出家門，一探全台有哪些有趣的體驗活動。
21世紀的新型鴉片　你知多少？
(2019-12-22)
李金福
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Department of Communication and Technology
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傳播與科技學系
「電子鴉片抬頭不見低頭見」專題

你知道全世界，人們每日平均吸食電子鴉片是多長時間嗎？你知道多數人吸的電子鴉片是什麼類別嗎？本篇將用數據帶你一窺電子鴉片身後不為人知的秘密！
一起逛市場！　東門市場的重生
(2019-12-22)
黃心姵
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Department of Communication and Technology
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傳播與科技學系
【傳統市場的重生　一起逛市場！】專題

幾年前的東門市場因為沒落，環境陰暗，連當地人也不太願意進入。近幾年，在新竹市政府與國立清華大學合力推動「東門青年基地」下，年輕人與創新的元素進入東門市場，為市場帶來活化的可能。
保育動物與我何干？不是只有愛動物那麼簡單！
(2019-12-22)
李旻珊
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Department of Communication and Technology
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傳播與科技學系
【不是只有愛動物那麼簡單！保育知識面面觀】專題

每次人為開發下的犧牲，其實都深深影響著大自然的平衡與脈動，也是野生動物需要保育的實際理由。野生動物路死觀察與傷病救援，更是值得關注與學習的課題。
Path-based MAXBAND with green-split variables and traffic dispersion
(2019-12-23)
Cho, H-J
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Huang, T-J
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Huang, C-C L.
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運輸與物流管理系註：原交通所+運管所
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Department of Transportation and Logistics Management
In this paper, we propose two path-based MAXBAND models for solving signal synchronization problems for coordinated traffic signalization systems. In the first proposed model (RM1), we relax the assumptions that the lengths of the common cycle, as well as the green splits, are fixed in the base path-based MAXBAND model. These two factors are considered as decision variables in RM1, which leads us to a generalized offset optimization problem. In the second model (RM2), we further relax the free-flow speed assumption used for estimating the link travel times in the coordinated system. Since the free-flow speed can only be reached in rare occasions, we, instead, adopt the Robertson's dispersion module for this purpose. Proposed methodologies are applied to solving a real-world application in that a pure-traffic arterial system in Chubei city, Taiwan, is analyzed for performance evaluations. Numerical results suggest significant improvements from the proposed models, compared to plans suggested by the governmental authority and the literature. From path-wise perspective, model RM1 and RM2 are nip-and-tuck alternatives. From an aggregate perspective, model RM2 has the best performance among all alternatives, with overall improvements around .
SnCl4-catalyzed solvent-free acetolysis of 2,7-anhydrosialic acid derivatives
(2019-12-23)
Asressu, Kesatebrhan Haile
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Wang, Cheng-Chung
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應用化學系
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Department of Applied Chemistry
Sialic acid-containing glycans are found in different sialic acid forms and a variety of glycosidic linkages in biologically active glycoconjugates. Hence, the preparation of suitably protected sialyl building blocks requires high attention in order to access glycans in a pure form. In line with this, various C-5-substituted 2,7-anhydrosialic acid derivatives bearing both electron-donating and -withdrawing protecting groups were synthesized and subjected to different Lewis acid-catalyzed solvent-free ring-opening reactions at room temperature in the presence of acetic anhydride. Among the various Lewis acids tested, the desired acetolysis products were obtained in moderate yields under tin(IV) chloride catalysis. Our methodology could be extended to regioselective protecting group installations and manipulations towards a number of thiosialoside and halide donors.
Thermal Management of GaN-on-Si High Electron Mobility Transistor by Copper Filled Micro-Trench Structure
(2019-12-23)
Mohanty, Srikant Kumar
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Chen, Yu-Yan
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Yeh, Ping-Hung
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Horng, Ray-Hua
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交大名義發表
Self-heating effect is a major limitation in achieving the full performance potential of high power GaN power devices. In this work, we reported a micro-trench structure fabricated on the silicon substrate of an AlGaN/GaN high electron mobility transistor (HEMT) via deep reactive ion etching, which was subsequently filled with high thermal conductive material, copper using the electroplating process. From the current-voltage characteristics, the saturation drain current was improved by approximately 17% with the copper filled micro-trench structure due to efficient heat dissipation. The I-DS difference between the pulse and DC bias measurement was about 21% at high bias V-DS due to the self-heating effect. In contrast, the difference was reduced to approximately 8% for the devices with the implementation of the proposed structure. Using Micro-Raman thermometry, we showed that temperature near the drain edge of the channel can be lowered by approximately similar to 22 degrees C in a HEMT operating at similar to 10.6 Wmm(-1) after the implementation of the trench structure. An effective method for the improvement of thermal management to enhance the performance of GaN-on-Silicon HEMTs was demonstrated.
From symmetry to entropy: Crystal entropy difference strongly affects early stage phase transformation
(2019-12-23)
Hu, C. H.
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Chen, Y. C.
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Yu, P. J.
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Fung, K. Y.
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Hsueh, Y. C.
Although the connection between symmetry and entropy is not clear, researchers calculate configurational entropy with an ideal gas mixing model all along regardless of which structure they are considering. However, it is obvious that crystalline structures have symmetry, while an ideal gas does not. Therefore, the same ideal gas mixing value should not be assigned to other structures, such as face-centered-cubic (fcc) and hexagonal-close-packed (hcp) structures. Here, we offer a precise definition for determining the configurational entropy of crystals. We calculate the difference in configurational entropy between fcc and hcp structures based on Burnside's lemma in combinatorial mathematics and crystallographic rotation-point groups.
Utilization of low-melting temperature alloy with confined seal for reducing thermal contact resistance
(2019-12-25)
Chu, Wen-Xiao
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Tseng, Po-Hsiang
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Wang, Chi-Chuan
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機械工程學系
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Department of Mechanical Engineering
This paper investigates a novel design of thermal interface material (TIM) using low-melting temperature alloy (LMTA) with confined seal. For solid TIM like indium foil, the thermal contact resistance is reduced with the rise with contact pressure, and an apparent hysteresis phenomenon may occur during loading/unloading of contact pressure. For the solid-state TIM, the indium TIM outperforms those of copper, lead and tin TIMs. The molten LMTA can further reduce the thermal contact resistance, however, the overflow and dislocation problems are observed. Hence, a novel confined design by using LMTA with an annular metal seal is proposed that can completely prevent aforementioned problems. Yet the reliability of the novel TIM is also investigated after hundred thermal cycles.
Effect of nonuniform pin size on heat transfer in a rotating rectangular channel with pin-fin arrays
(2019-12-25)
Hung, Shuo-Cheng
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Huang, Szu-Chi
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Liu, Yao-Hsien
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機械工程學系
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Department of Mechanical Engineering
Internal channels to cool the trailing edges of gas turbine blades were typically installed with pin-fin arrays for higher heat transfer enhancement. In this study, the heat transfer characteristics in a rotating rectangular channel (aspect ratio = 4:1) with differently sized pin-fin arrays were experimentally investigated. Liquid crystal thermography was used to measure heat transfer on the endwall in a staggered pin-fin array at a channel orientation of 135 degrees. The staggered array was composed of four or three pins in a row. Pins of varying diameters were inserted in every row exhibiting four pins; either two or four pins were replaced. The rotation numbers ranged from 0 to 0.33, and the Reynolds numbers ranged from 10,000 to 20,000. The results revealed that flow acceleration, separation, and wake flow contributed to various heat transfer contours. Larger pins contributed to higher local flow velocities through fin spacing and produced higher heat transfer distributions. The effect of rotation improved heat transfer enhancement on both trailing and leading surfaces. The friction factor ratio increased when more large-sized pins were installed in the array.
Mechanism of Photocatalytic CO2 Reduction by Bismuth-Based Perovskite Nanocrystals at the Gas-Solid Interface
(2019-12-25)
Bhosale, Sumit S.
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Kharade, Aparna K.
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Jokar, Efat
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Fathi, Amir
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Chang, Sue-min
We report here a series of nontoxic and stable bismuth-based perovskite nanocrystals (PeNCs) with applications for photocatalytic reduction of carbon dioxide to methane and carbon monoxide. Three bismuth-based PeNCs of general chemical formulas A(3)Bi(2)I(9), in which cation A(+) = Rb+ or Cs+ or CH3NH3+ (MK), were synthesized with a novel ultrasonication top-down method. PeNC of Cs3Bi2I9 had the best photocatalytic activity for the reduction of CO2 at the gas solid interface with formation yields 14.9 mu mol g(-1) of methane and 77.6 mu mol g(-1) of CO, representing a much more effective catalyst than TiO2 (P25) under the same experimental conditions. The products of the photocatalytic reactions were analyzed using a gas chromatograph coupled with a mass spectrometer. According to electron paramagnetic resonance and diffuse-reflectance infrared spectra, we propose a reaction mechanism for photoreduction of CO2 via Bi-based PeNC photocatalysts to form CO, CH4, and other possible side products.
Analytical study for swimmers in a channel
(2019-12-25)
Farutin, A.
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Wu, H.
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Hu, W-F
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Rafai, S.
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Peyla, P.
There is an overabundance of microswimmers in nature, including bacteria, algae, mammalian cells and so on. They use flagellum, cilia or global shape changes (amoeboid motion) to move forward. In the presence of confining channels, these swimmers exhibit often non-trivial behaviours, such as accumulation at the wall, navigation and so on, and their swimming speed may be strongly influenced by the geometric confinement. Several numerical studies have reported that the presence of walls either enhances or reduces the swimming speed depending on the nature of the swimmer, and also on the confinement. The purpose of this paper is to provide an analytical explanation of several previously obtained numerical results. We treat the case of amoeboid swimmers and the case of squirmers having either a tangential (the classical situation) or normal velocity prescribed at the swimmer surface (pumper). For amoeboid motion we consider a quasi-circular swimmer which allows us to tackle the problem analytically and to extract the equations of the motion of the swimmer, with several explicit analytical or semi-analytical solutions. It is found that the deformation of the amoeboid swimmer as well as a high enough order effect due to confinement are necessary in order to account for previous numerical results. The analytical theory accounts for several features obtained numerically also for non-deformable swimmers.
The numerical simulation with staggered alternation locations and multi-flow directions on the thermal performance of double-layer microchannel heat sinks
(2019-12-25)
Shen, Han
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Xie, Gongnan
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Wang, Chi-Chuan
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機械工程學系
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Department of Mechanical Engineering
The novel staggered flow alternation structure (SFAS) proposed in prior study has proved to be an efficient way in improving the overall thermal performance with acceptable pressure drop penalty in Double-layer Microchannel Heat Sinks (DMHSs). Based on the prior design, a further numerical investigation concerning the optimum location of SFAS in DMHSs is presented. The corresponding temperature fields, Nusselt number, flow fields, pressure drop and thermal characteristics are presented through verified computational mode. In addition, the effect of flow arrangements such as concurrent, upper-inlet/lower-inlet countercurrent arrangement on the thermal performance are studied in more details. The best thermal location of SFAS in the DMHSs is found to be based on the alterable locations and multi-flow directions. Yet, changing the location of staggered alternation structure does not lead to an appreciable rise of pressure drop penalty in DMHSs. However, the improvement in thermal performance for upper-inlet countercurrent arrangement is significant. Placing the SFAS in the middle of the DMHSs ensures the best overall thermal performance.
GLORIA企業講座：逸達生技甘良生總經理分享藥物開發經驗
(國立陽明大學, 2019-12-27)
陽明電子報編輯小組
陽明國際產學聯盟11月份「生醫領航方舟」企業講座，特別邀請對於臺灣、美國新藥開發產業有相當豐富經驗的逸達生技甘良生總經理蒞...
軟網校友共襄盛舉～花蓮鳳林盃軟式網球錦標賽
(國立陽明大學, 2019-12-27)
陽明電子報編輯小組
9月20-22日，由賴岡黌校友主辦之花蓮鳳林盃軟網賽第一屆國際賽事，邀集同曾是軟網隊的多位校友共襄盛舉，更別具校友團圓的意義（...
【生理所生涯座談】畢業不再ㄎㄎ
(國立陽明大學, 2019-12-27)
陽明電子報編輯小組
榮陞及獲獎訊息
(國立陽明大學, 2019-12-27)
陽明電子報編輯小組
校友中心收到許多陽明校友們的好消息分享，有獲獎喜訊、研究突破，以及步步高陞等，是陽明人的驕傲～