Browsing by Issue Date, starting with "2016-01-05"

Now showing 1 - 20 of 18139

The corrosion protection study on inner surface from welding of aluminum alloy 7075-T6 hydrogen storage bottle
(2016-01-05)
Wu, Shinn -Dar
;
Cheng, Wei-Yang
;
Yang, Jason H. C.
;
Yang, Chien-Hua
;
Liao, Shao-Yen
This study investigated the resistance effect of Sodium-Silicate solution coated on the welding zone surface on stress corrosion cracking, which was caused by the penetration of storage hydrogen into micro cracks. This phenomenon occasionally occurred while welding the joint with gas tungsten arc welding (GTAW) between the bottle cover and body fabricated using aluminum alloy 7075 (Al-Zn-Mg). The coating effect of Sodium-Silicate was evaluated using four factors, namely, hardening agent, solidification method, coating thickness, and baking temperature. Taguchi analysis was applied to determine the optimal parameters, which were then used to effectively improve the corrosion resistance of the welding zone. The corrosion resistance of the group added with magnesium oxide as a hardening agent increased to 200% compared with the group added with Sodium-Silicate but without hardening agent. The penetration depth of the tested group added with talc as a hardening agent also increased to 20%. Copyright (C) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
Preparation of Cu2ZnSnS4 (CZTS) sputtering target and its application to the fabrication of CZTS thin-film solar cells
(2016-01-05)
Lin, Yu-Pin
;
Chi, Yi-Fang
;
Hsieh, Tsung-Eong
;
Chen, Yen-Chih
;
Huang, Kun-Ping
The CuS, ZnS and SnS2 raw powders were adopted as the starting materials for preparing the 2-inch Cu2ZnSnS4 (CZTS) sputtering target. The powders were mixed at various molar ratios of Cu:Zn:Sn:S = 1.6:1:1:4, 1.8:1:1:4 and 2:1:1:4, pressed into 6-mm pellet forms, and then sintered at different temperatures for 8 h. Accordingly, the influence of powder constitution and heat-treatment conditions on the microstructure, composition and morphology of CZTS pellets were investigated. Microstructure and composition analyses indicated that the sample prepared with the Cu molar ratio of 1.6 and sintered at 600 degrees C for 8 h forms the kesterite CZTS single-phase structure with the Cu-poor/Zn-rich composition. The 2-inch CZTS sputtering target was prepared by utilizing the method established by the study of 6-mm pellets and adopted for depositing the CZTS thin films. The CZTS layer deposited at the working pressure of 1 mtorr followed by the sulfurization at 570 degrees C for 1 h possessed the stoichiometry of Cu24.15Zn14.73Sn10.75S50.37 which is the closest to the ideal stoichiometric ratio of 2:1:1:4. Moreover, it exhibited the bandgap of 1.5 eV, p-type carrier concentration of 2.8 x 1017 cm(-3) and mobility of 8.61 cm(2) V-1 s(-1). Such a CZTS layer was implanted in the thin-film solar cells with the device structure of Mo/CZTS/CdS/i-ZnO/IZO/Al. Under the AM1.5 illumination condition, the CZTS thin-film solar cell sample with the open-circuit voltage of 0.52 V, the short-circuit current density of 19.17 mA/cm(2), the fill factor of 52.7% and the conversion efficiency of 5.2% was achieved. (C) 2015 Published by Elsevier B.V.
Smooth solutions of the one-dimensional compressible Euler equation with gravity
(2016-01-05)
Hsu, Cheng-Hsiung
;
Lin, Song-Sun
;
Yang, Chi-Ru
;
應用數學系
;
Department of Applied Mathematics
We study one-dimensional motions of polytropic gas governed by the compressible Euler equations. The problem on the half space under a constant gravity gives an equilibrium which has free boundary touching the vacuum and the linearized approximation at this equilibrium gives time periodic solutions. But it is difficult to justify the existence of long-time true solutions for which this time periodic solution is the first approximation. The situation is in contrast to the problem of free motions without gravity. The reason is that the usual iteration method for quasilinear hyperbolic problem cannot be used because of the loss of regularities which causes from the touch with the vacuum. Due to this reason, we try to find a family of solutions expanded by a small parameter and apply the Nash-Moser Theorem to justify this expansion. Note that the application of Nash-Moser Theorem is necessary for the sake of conquest of the trouble with loss of regularities, and the justification of the applicability requires a very delicate analysis of the problem. (C) 2015 Elsevier Inc. All rights reserved.
交大e-News第201期-120週年校慶系列─交大挾雙甲馳騁躍竹風
(2016-01-06)
國立交通大學秘書室
;
Secretariat
Higher serum betatrophin level in type 2 diabetes subjects is associated with urinary albumin excretion and renal function
(2016-01-07)
Chen, Chang-Chiang
;
Susanto, Hendra
;
Chuang, Wen-Han
;
Liu, Ta-Yu
;
Wang, Chih-Hong
Background: Betatrophin is a newly identified liver-derived hormone that is associated with glucose homeostasis and lipid metabolism. Although dysregulated lipid metabolism results in diabetic nephropathy (DN) development in patients with type 2 diabetes mellitus (T2DM), it is not understood whether betatrophin is associated with urinary albumin excretion and renal function. Methods: Based on albumin/creatinine ratio (ACR), 109 T2DM patients were divided into normoalbuminuria (ACR < 30 mg/g), microalbuminuria (ACR between 30 and 300 mg/g), and macroalbuminuria (ACR > 300 mg/g). Serum betatrophin levels of 109 T2DM patients and 32 healthy subjects were determined by enzyme-linked immunosorbent assay (ELISA). Results: Serum level of betatrophin was significantly increased in T2DM patients with normoalbuminuria, microalbuminuria, and macroalbuminuria as compared with healthy subjects (P < 0.001). Serum betatrophin level was positively correlated with sex, duration of diabetes, systolic blood pressure (SBP), body mass index (BMI), ACR, and triglyceride, whereas it was inversely correlated with estimated glomerular filtration rate (eGFR), total cholesterol, and high-density lipoprotein cholesterol (HDL-C) (P < 0.001). Furthermore, multivariate regression analysis showed the betatrophin was significantly and positively independent with triglyceride and low-density lipoprotein cholesterol (LDL-C) (P < 0.05), whereas it was inversely independent with eGFR, total cholesterol, and low-density lipoprotein cholesterol (HDL-C) (P < 0.05). In addition, the betatrophin had higher odds of having DN [odds ratio (OR) = 5.65, 95 % confidence interval (CI) 2.17-14.57, P < 0.001]. Conclusion: Betatrophin is significantly increased in T2DM patients with different stages of albuminuria. Betatrophin may be a novel endocrine regulator involved in DN development.
Metal-free organic dyes for TiO2 and ZnO dye-sensitized solar cells
(2016-01-07)
Selopal, Gurpreet Singh
;
Wu, Hui-Ping
;
Lu, Jianfeng
;
Chang, Yu-Cheng
;
Wang, Mingkui
We report the synthesis and characterization of new metal-free organic dyes (namely B18, BTD-R, and CPTD-R) which designed with D-p-A concept to extending the light absorption region by strong conjugation group of p-linker part and applied as light harvester in dye sensitized solar cells (DSSCs). We compared the photovoltaic performance of these dyes in two different photoanodes: a standard TiO2 mesoporous photoanode and a ZnO photoanode composed of hierarchically assembled nanostructures. The results demonstrated that B18 dye has better photovoltaic properties compared to other two dyes (BTD-R and CPTD-R) and each dye has higher current density (J(sc)) when applied to hierarchical ZnO nanocrystallites than the standard TiO2 mesoporous film. Transient photocurrent and photovoltage decay measurements (TCD/TVD) were applied to systematically study the charge transport and recombination kinetics in these devices, showing the electron life time (T-R) of B18 dye in ZnO and TiO2 based DSSCs is higher than CPTD-R and BTD-R based DSSCs, which is consistent with the photovoltaic performances. The conversion efficiency in ZnO based DSSCs can be further boosted by 35%, when a compact ZnO blocking layer (BL) is applied to inhibit electron back reaction.
Remarkably high mobility ultrathin-film metal-oxide transistor with strongly overlapped orbitals
(2016-01-08)
Shih, Chen Wei
;
Chin, Albert
;
Lu, Chun Fu
;
Su, Wei Fang
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電子工程學系及電子研究所
High mobility channel thin-film-transistor (TFT) is crucial for both display and future generation integrated circuit. We report a new metal-oxide TFT that has an ultra-thin 4.5 nm SnO2 thickness for both active channel and source-drain regions, very high 147 cm(2)/Vs field-effect mobility, high I-ON/I-OFF of 2.3 x 10(7), small 110 mV/dec sub-threshold slope, and a low V-D of 2.5V for low power operation. This mobility is already better than chemical-vapor-deposition grown multi-layers MoS2 TFT. From first principle quantum-mechanical calculation, the high mobility TFT is due to strongly overlapped orbitals.
Demonstrating 1 nm-oxide-equivalent-thickness La2O3 and HfO2 multi-layer composite oxides on In0.53Ga0.47As MOS capacitor
(2016-01-08)
Wu, Wen-Hao
;
Lin, Yueh-Chin
;
Hou, Tzu-Ching
;
Lin, Tai-Wei
;
Hsu, Hisang-Hua
The use of a high k composite dielectric composed of La2O3 and HfO2 layers as the gate dielectric for In0.53Ga0.47As MOS application is proposed. Two multi-layer structures of La2O3 (1 nm)/HfO2 (1 nm) and La2O3 (0.5 nm)/HfO2 (0.5 nm) were deposited and annealed at 450 and 500 degrees C for device performance comparison. X-ray photoelectron spectroscopy, TEM and C-V measurements were used for the interface analysis between the oxide and the semiconductor. Finally, a 1 nm equivalent-oxide-thickness dielectric with small hysteresis of 88 mV and D-it of 1.9 x 10(12) cm(-2) eV(-1) was achieved for six layers of an La2O3 (0.5 nm)/HfO2 (0.5 nm) composite oxide structure on an In0.53Ga0.47As MOS capacitor with a post-deposition annealing temperature of 450 degrees C.
就讓影像訴說這個世代的日常吳平海紀錄片導演
(國立交通大學客家文化學院, 2016-01-09)
陳曦
;
黃瓊宇
擺設數台電腦與各式攝影機的工作室，書架上塞滿影像專業書籍，牆壁懸掛紀錄片獎狀、影展海報與白玫瑰社會關懷協會的感謝狀。南努客音像工作室紀錄片導演吳平海，曾以義工身分幫助協會拍攝影片，「我的態度是這樣，有錢沒錢是另外一件事，人家需要你，你就要幫忙服務。」
寫下人生的智慧莊華堂／作家
(國立交通大學客家文化學院, 2016-01-09)
石宓婕
;
陳柏州
興許是老舊社區的關係，都市的光亮沒有照進這裡，莊華堂的住家埋藏在一片幽暗之下。走入莊華堂工作室觸目所及是五花八門的書刊，從事小說創作、拍過紀錄片、玩過劇團，這些豐富的文化產業經驗讓莊華堂寫出了歷史族群系列小說，寫出了一個世代地域的故事。
不羈靈魂狂放當代劇場黎煥雄／劇場導演、作家
(國立交通大學客家文化學院, 2016-01-09)
徐煜婷
;
甯尚瑄
雖然誕生再上演著忠貞愛國戲碼的年代，但黎煥雄一站上劇場舞台就開始書寫對抗時代氛圍、追求自由、突破限制的故事；當台灣劇場遇上最狂放不羈的靈魂時，風起雲湧的小劇場狂潮就此展開。
為幸福留下創造永恆的形式喜恩／攝影師
(國立交通大學客家文化學院, 2016-01-09)
林俞君
;
廖珮羽
每一回按下快門，喜恩相信畫面不單純是呈現「美」而已，攝影為的是傳遞相片的內涵與價值。
以一世守護台灣史料魏德文／南天書局創辦
(國立交通大學客家文化學院, 2016-01-09)
許翔
;
陳志愷
南天書局自1976年成立，以出版學術書籍聞名，是台灣文史資料的典藏寶庫。魏德文是南天書局的創始人也是總經理，他的一生有大半時間都奉獻給書籍志業，為台灣出版許多經典書籍。
演一齣人生精采好戲朱陸豪／演員
(國立交通大學客家文化學院, 2016-01-09)
蔡瑋薇
;
史惠如
卸下傳統京劇的華麗服裝，朱陸豪以一身輕便的裝扮走在台北的巷弄街道，而那輕盈的步伐和如煦陽般的笑容，讓人不經意地受他的活力所感染，也無法相信那年輕的外貌下，蘊含的是超過一甲子的風霜歷練。
吟唱文化雋永之歌羅思容／音樂創作人
(國立交通大學客家文化學院, 2016-01-09)
廖亦曦
;
林哲辰
甫踏入羅思容位於新店的工作室，映入眼簾的是各式各樣古色古香的骨董家具和整齊排放在書架上的書籍CD。這裡是她創作的小天地，同時也是激發她創作靈感和心靈沉澱的祕密花園。羅思容有著親切的笑容，溫文典雅沒有偶像包袱，像自己的媽媽在家門口迎接晚歸的孩子一樣，那種氛圍是多麼讓人感動與溫馨。
精淬時空書寫台灣的故事鍾文音／作家
(國立交通大學客家文化學院, 2016-01-09)
林家安
;
楊皓雯
台灣90年代後期崛起的作家中，鍾文音以中部成長背景為題材創作出的小說囊括了台灣文壇多項重要獎項，同時存在身上的客家與閩南血統，注定交織出鍾文音探索家族、身分與時代記憶的創作因子。
此生只為小說狂高翊峰／雜誌總編輯、作家
(國立交通大學客家文化學院, 2016-01-09)
范瑀真
;
魏若芸
輕脆入耳，是玻璃門外停泊的軟皮鞋跟。小說家輕推門而入，屏息等待的光線魚貫逃出，迎撞他滿身，自他灰色格紋貝雷帽和合身剪裁的粉色襯衫抖落一地光塵。小說家沉穩從容，個性的短鬍渣豎成時尚熟男的傲骨。這儒雅的中年男子，是現任男性雜誌《FHM》總編輯，以文字震懾台灣文壇的六年級小說家──高翊峰。
滌淨繁塵的溫柔浪花黃騰浩／演員
(國立交通大學客家文化學院, 2016-01-09)
蔡宛庭
;
翁冠豪
一身輕便的T恤短褲配上極簡的墨綠色軍帽，低調樸實的衣著擋不住眉宇之間散發出的傲然自信與魅力。時光的洗滌在他身上看不見一點點蹤跡，然而歲月的磨練卻紮紮實實駐足進黃騰浩的人生歷練；身處喧囂擾攘、日新月異的大城市裡卻保有一顆嚮往恬淡自然、單純樸實的老靈魂，並堅持用自己的溫度譜出一條屬於自己的路。
書不盡客家文化之愛邱一帆／作家
(國立交通大學客家文化學院, 2016-01-09)
呂竟
;
陳嬿羽
要寫出感動人心的詩，自己就要先被感動；看到邱一帆感人的客語詩集，問他自己很感動的客家經驗是什麼？「係阿姆吧！」他說。雖然邱一帆住的東村距離老家小南埔不到十公里路程，但無法與孩子朝夕相見的母親至今仍然會掛念，仍會打電話關心，這濃濃的情感，都化在邱一帆以客語書寫的一首首客家詩中。
以生命豐富表演謝瓊煖／演員
(國立交通大學客家文化學院, 2016-01-09)
李元莉
由客家電視台所製作的《在河左岸》自開播以來持續受到許多專業人士與觀眾的肯定，其中嗓音低沈、對生命有著超然態度、堅毅不撓、擅於交際又熱情喜歡照顧人的大姊黃麗霞，讓觀眾印象深刻，而這位個性爽朗，待人細膩周到的角色，即是由擁有相似性格、亦為客家人的謝瓊煖生動詮釋。入木三分的演技早已深植人心，但在精湛演技之外，我們更看見一位表演藝術工作者對表演與生命的熱愛。