Browsing by Issue Date, starting with "2016-04-27"

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Multi-wavelength laser tuning based on cholesteric liquid crystals with nanoparticles
(2016-04-27)
Chen, Sheng-Chieh
;
Lin, Jia-De
;
Lee, Chia-Rong
;
Hwang, Shug-June
;
影像與生醫光電研究所
A controllable multi-wavelength laser from a dye-doped cholesteric liquid crystal (DDCLC) cell is demonstrated by incorporating self-assembled polyhedral oligomeric silsesquioxane (POSS) nanoparticles (NPs). Multi-wavelength lasing emission is achieved by formation of multiple planar domains; this formation is dominantly influenced by the vertical alignment of NP clusters adsorbed on the substrate surface through a rapid thermal annealing process. The multi-wavelength lasing peaks are generated through the resultant effect of multiple longitudinal resonant modes of a Fabry-Perot etalon between the cell substrates and the amplification of fluorescence photons with the resonant wavelengths within the broadening long-wavelength edge of the reflection band of the multi-domain CLC. The amount of multi-wavelength lasing peaks can be controlled by changing the POSS NP concentration and the cooling rate of the cell. Furthermore, thermo-reversible control of the multi-wavelength lasing emission can be attained by controlling the thermally induced phase separation process of the POSS/DDCLC cell via a heating/cooling cyclic process.
Illumination Effect on Bipolar Switching Properties of Gd:SiO2 RRAM Devices Using Transparent Indium Tin Oxide Electrode
(2016-04-27)
Chen, Kai-Huang
;
Chang, Kuan-Chang
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Chang, Ting-Chang
;
Tsai, Tsung-Ming
;
Liang, Shu-Ping
To discuss the optoelectronic effect on resistive random access memory (RRAM) devices, the bipolar switching properties and electron-hole pair generation behavior in the transparent indium tin oxide (ITO) electrode of Gd:SiO2 thin films under the ultraviolet (lambda = 400 nm) and red-light (lambda = 770 nm) illumination for high resistance state (HRS)/low resistance state (LRS) was observed and investigated. In dark environment, the Gd:SiO2 RRAM devices exhibited the ohmic conduction mechanism for LRS, exhibited the Schottky emission conduction and Poole-Frankel conduction mechanism for HRS. For light illumination effect, the operation current of the Gd:SiO2 RRAM devices for HRS/LRS was slightly increased. Finally, the electron-hole pair transport mechanism, switching conduction diagram, and energy band of the RRAM devices will be clearly demonstrated and explained.
Emergence of a Fermionic Finite-Temperature Critical Point in a Kondo Lattice
(2016-04-27)
Chou, Po-Hao
;
Zhai, Liang-Jun
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Chung, Chung-Hou
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Mou, Chung-Yu
;
Lee, Ting-Kuo
The underlying Dirac point is central to the profound physics manifested in a wide class of materials. However, it is often difficult to drive a system with Dirac points across the massless fermionic critical point. Here by exploiting screening of local moments under spin-orbit interactions in a Kondo lattice, we show that below the Kondo temperature, the Kondo lattice undergoes a topological transition from a strong topological insulator to a weak topological insulator at a finite temperature T-D. At T-D, massless Dirac points emerge and the Kondo lattice becomes a Dirac semimetal. Our analysis indicates that the emergent relativistic symmetry dictates nontrivial thermal responses over large parameter and temperature regimes. In particular, it yields critical scaling behaviors both in magnetic and transport responses near T-D.
Selective Neuromuscular Denervation in Taiwanese Severe SMA Mouse Can Be Reversed by Morpholino Antisense Oligonucleotides
(2016-04-28)
Lin, Te-Lin
;
Chen, Tai-Heng
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Hsu, Ya-Yun
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Cheng, Yu-Hua
;
Juang, Bi-Tzen
Spinal muscular atrophy (SMA) is an autosomal recessive motor neuron disease caused by deficiency of the survival of motor neuron (SMN) protein, which leads to synaptic defects and spinal motor neuron death. Neuromuscular junction (NMJ) abnormalities have been found to be involved in SMA pathogenesis in the SMN Delta 7 SMA mouse model. However, whether similar NMJ pathological findings present in another commonly used mouse model, the Taiwanese SMA mouse, has not been fully investigated. To examine the NMJs of the Taiwanese severe SMA mouse model (Smn(-/-); SMN2(tg/0)), which is characterized by severe phenotype and death before postnatal day (P) 9, we investigated 25 axial and appendicular muscles from P1 to P9. We labelled the muscles with anti-neurofilament and anti-synaptophysin antibodies for nerve terminals and a-bungarotoxin for acetylcholine receptors (AChRs). We found that severe NMJ denervation (<50% fully innervated endplates) selectively occurred in the flexor digitorum brevis 2 and 3 (FDB-2/3) muscles from P5, and an increased percentage of fully denervated endplates correlated with SMA progression. Furthermore, synaptophysin signals were absent at the endplate compared to control littermate mice, suggesting that vesicle transport might only be affected at the end stage. Subsequently, we treated the Taiwanese severe SMA mice with morpholino (MO) antisense oligonucleotides (80 mu g/g) via subcutaneous injection at P0. We found that MO significantly reversed the NMJ denervation in FDB-2/3 muscles and extended the survival of Taiwanese severe SMA mice. We conclude that early NMJ denervation in the FDB-2/3 muscles of Taiwanese severe SMA mice can be reversed by MO treatment. The FDB-2/3 muscles of Taiwanese severe SMA mice provide a very sensitive platform for assessing the effectiveness of drug treatments in SMA preclinical studies.
城市樣貌　操之在己
(2016-05-01)
麻愷晅
;
Department of Communication and Technology
;
傳播與科技學系
沒有城市，就沒有社會，各國城市該如何滿足居民的生活機能，並隨時代調整，是所有城市需學習的課題。
Bosses, Soldiers and Rice Grains. Vietnamese Criminal Networks and Criminal Activities in the Czech Republic
(2016-05)
Nozina, Miroslav
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Kraus, Filip
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交大名義發表
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National Chiao Tung University
Since 1975, the numbers of Vietnamese living in Europe have steadily increased. As new emigrants appeared in various countries, new types of crime came with them. Also in the Czech Republic, where a relatively large Vietnamese diaspora has been in existence since communist times, numerous Vietnamese criminal networks were established. The Vietnamese networks have a specific structure and modus operandi. Their bosses create parallel power structures within the Vietnamese diaspora and frequently merge together legal and illegal activities. The Vietnamese criminal networks are engaged in a broad spectrum of criminal activities, including economic crime, people smuggling and trafficking in drugs.
Electro-photocatalytic Fenton Decolorization of Orange G Using Mesoporous TiO2/stainless Steel Mesh Photo-Electrode Prepared by the Sol-Gel Dip-Coating Method
(2016-05)
Nurhayati, Ervin
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Yang, Hsinju
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Chen, Chienhung
;
Liu, Chingfang
;
Juang, Yaju
A photo-electrochemical process is a powerful and eco-friendly method for treating industrial wastewater. Electro-photocatalytic Fenton (EPF) was employed for orange G decolorization using two kinds of photo-electrodes with TiO2 film-coated stainless steel (SS) mesh. These photo-electrodes are prepared by a dip-coating method from the sol-gel-derived TiO2 sols incorporating with various amounts of P25+TiO2 powders (SGDC method). The single dip-coated electrode with the TiO2 sol containing 50 g/L P25 powders possesses similar crystallinity and decolorization performance to the four repetitive dip-coated electrodes with pure TiO2 sol. The kinetics of orange G decolorization using P25+TiO2 film electrode in photocatalytic (PC), electro-Fenton (EF) and EPF processes followed pseudo first-order kinetics model, and the EPF has the highest reaction rate. The efficiency of orange G decolorization achieves 78% via the EPF reaction for 3 h. The SGDC method using the TiO2 sol containing P25 powders not only enhances the TiO2 coating on the SS substrate, but also produces microcracks in the film, that facilitates the in-situ generation of ferrous ions and further induces the EPF reaction for an effective degradation of organic matter in wastewater.
砂拉越的一位客家公務員
(國立交通大學客家文化學院, 2016-05)
周丹尼
;
Daniel Chew
本文為作者父親威廉周漢發（1913-1985）的傳記研究。周漢發是祖籍中國廣東省新安的客家人，生於砂拉越古晉，其雙親從廣東東莞移民至此。在當時砂拉越的社會歷史中，一般都將客家人聯想為鄉居、以務農為生，因而在昔日多處於邊緣地位。但受過中西教育薰陶的周漢發則選擇了另一條擔任公務員的職業生涯。這篇傳記探討周漢發的生平和事業，尤其是他在1946年至1963年砂拉越英國殖民統治時期的公務生涯。本文引述了家人記憶、口述歷史、文獻和相片等，來重建略窺周漢發的公務員生涯。周漢發於1968年退休後，成為古晉新安客家人的惠東安會館發起人之一，並於該會館1971年成立時擔任副主席。
1.48-kV enhancement-mode AlGaN/GaN high-electron-mobility transistors fabricated on 6-in. silicon by fluoride-based plasma treatment
(2016-05-01)
Yeh, Chih-Tung
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Wang, Wei-Kai
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Shen, Yi-Siang
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Horng, Ray-Hua
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電機學院
Enhancement-mode AlGaN/GaN high-electron-mobility transistors (HEMTs) were fabricated on a Si substrate by fluorine plasma treatment without pre-etching. The threshold voltage shifted from % 8 to 2.3 V, effectively converting the depletion-mode HEMT to the enhancement-mode HEMT. The leakage current was reduced by two orders of magnitude by CF4 plasma treatment. The device exhibited a superior performance with a maximum drain saturation current of 210mA/mm at V-GS = 10V and a peak gain of 44.1mS/mm. A low off-state gate leakage current of 10(-6)mA/mm, ION/IOFF ratio of approximately 10(8), and high breakdown voltage of 1480V were obtained. (C) 2016 The Japan Society of Applied Physics
評《金曲獎頒獎典禮》：客家與主流的跨文化溝通
(國立交通大學客家文化學院, 2016-05)
李宇昇
;
徐智俊
;
Yu-sheng Li and Zhi Jiun X
金曲獎頒獎典禮是不分族群共襄盛舉的音樂活動，特別是在1993及1995年增設客家音樂相關獎項後，客家音樂工作者應該善用機會好好表現自己，進行文化交流，以增加主流觀眾的了解。本文以跨文化溝通的角度，特別針對四位客家歌手在典禮上的表現進行評論，並建議客家委員會要重視這項活動，主動提供專業意見讓客家族群有更佳的公眾形象。
城堡裡的公主　創建築王國
(2016-05-01)
黃琪
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Department of Communication and Technology
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傳播與科技學系
享譽國際的女建築師林明娥，舉凡臺灣多間電影院及大型家居賣場皆出自於她手，成功立足於男性職場。
Pseudo-Constant Switching Frequency in On-Time Controlled Buck Converter with Predicting Correction Techniques
(2016-05-01)
Chen, Wei-Chung
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Chen, Hsin-Chieh
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Chien, Meng-Wei
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Chou, Ying-Wei
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Chen, Ke-Horng
The predicting correction technique (PCT) is proposed to achieve an adaptive on-time control for ripple-based buck converters. The switching frequency f(SW) variation is suppressed when the PCT technique considers complete parasitic resistances of the components and devices. Even without extra clock-controlled circuits and current sensing circuits, the buck converter operates with a nearly constant f(SW) over a wide load range. Parasitic resistances almost cause no influence and restriction on f(SW). Only input voltage is used to predict the adaptive on-time. Measurement results show only 0.32% in Delta f(SW) / f(SW) and 5.7 kHz/A in Delta f(SW) / Delta I-LOAD in case of 1.4 A load current change and f(SW) is 2.5 MHz. Consequently, a pseudo-constant f(SW) with well-defined noise spectrum strongly benefits the solution of electromagnetic interference (EMI) for system-on-a-chip (SoC) applications.
宅錄設備全知道
(2016-05-01)
吳和謙
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Department of Communication and Technology
;
傳播與科技學系
近年來，錄音設備變得更加便宜、輕巧，使得大眾得以在家自行錄音創作，不受拘束。
Systematic risk and volatility skew
(2016-05)
Tzang, Shyh-Weir
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Wang, Chou-Wen
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Yu, Min-Teh
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交大名義發表
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National Chiao Tung University
The impact of systematic risk on volatility skew is assessed in a CAPM-GARCH framework under which the relationship between asset price and market index adheres to the CAPM with each residual following an asymmetric GARCH process. From numerical analysis, we demonstrate that (1) the relation between beta and implied volatilities presents a beta smile; (2) beta can determine the shape of implied volatility curve, but systematic risk proportion (SRP) cannot; and (3) the degree of negative skewness and positive kurtosis is proportional to the SRP; however, a higher SRP does not always lead to a higher level of implied volatility. (C) 2015 Elsevier Inc. All rights reserved.
評鍾秀梅、宋長青：《臺灣客家婦女研究：以美濃地區鍾、宋兩屋家族婦女生命史為例》
(國立交通大學客家文化學院, 2016-05)
洪馨蘭
;
Hsin-lan Hung
本文為評論鍾秀梅主持的臺灣客家婦女研究計畫成果，書名為《臺灣客家婦女研究：以美濃地區鍾、宋兩屋家族婦女生命史為例》，兩位研究者經由田野訪談與歷史對照，彙整位於美濃的兩個家族中女性的多元生命故事，並嘗試藉此與過去的客家女性研究、漢人家族研究、西方女性主義批判論述進行對話。
攝影小教學
(2016-05-01)
蕭泳
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Department of Communication and Technology
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傳播與科技學系
攝影一些基本原理。
High-permitivity cerium oxide prepared by molecular beam deposition as gate dielectric and passivation layer and applied to AlGaN/GaN power high electron mobility transistor devices
(2016-05)
Chiu, Yu Sheng
;
Liao, Jen Ting
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Lin, Yueh Chin
;
Liu, Shin Chien
;
Lin, Tai Ming
High-kappa cerium oxide (CeO2) was applied to AlGaN/GaN high-electron-mobility transistors (HEMTs) as a gate insulator and a passivation layer by molecular beam deposition (MBD) for high-power applications. From capacitance-voltage (C-V) measurement results, the dielectric constant of the CeO2 film was 25.2. The C-V curves showed clear accumulation and depletion behaviors with a small hysteresis (20 mV). Moreover, the interface trap density (D-it) was calculated to be 5.5 x 10(11) eV(-1)cm(-2) at 150 degrees C. A CeO2 MOS-HEMT was fabricated and demonstrated a low subthreshold swing (SS) of 87 mV/decade, a high ON/OFF drain current ratio (I-ON/I-OFF) of 1.14 X 10(9), and a low gate leakage current density (J(leakage)) of 2.85 X 10(-9)Acm(-2) with an improved dynamic ON-resistance (R-ON), which is about one order of magnitude lower than that of a conventional HEMT. (C) 2016 The Japan Society of Applied Physics
Automatic Test Environment Deployment and Service Testing Model in the Cloud
(2016-05)
Lo, Win-Tsung
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Sheu, Ruey-Kai
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Yuan, Shyan-Ming
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Luo, Guo-Heng
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資訊工程學系
Cloud testing has become a crucial concern due to the explosion of cloud services and requirements of reliable and high-quality service. The technologies of virtualization and infrastructures of cloud services have enabled service providers to deploy their services conveniently. However, current test models decrease the flexibility of test scenarios and test client customization. For solving these problems, this study proposes a testing service in the cloud to help the testing environment generation, deployment and execution of test scenarios. The tester can customize test scenarios involving clients, network topologies, and test scripts. In the paper, a demonstration test toolkit was implemented, and also used for testing distributed file system with various numbers of hosts, threads, and virtual network topologies.
Application Performance Profiling in Android Dalvik Virtual Machines
(2016-05-01)
Chang, Hung-Cheng
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Chang, Kuei-Chung
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Lin, Ying-Dar
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Lai, Yuan-Cheng
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資訊工程學系
Most Android applications are written in JAVA and run on a Dalvik virtual machine. For smartphone vendors and users who wish to know the performance of an application on a particular smartphone but cannot obtain the source code, we propose a new technique, Dalvik Profiler for Applications (DPA), to profile an Android application on a Dalvik virtual machine without the support of source code. Within a Dalvik virtual machine, we determine the entry and exit locations of a method, log its execution time, and analyze the log to determine the performance of the application. Our experimental results show an error ratio of less than 5% from the baseline tool Traceview which instruments source code. The results also show some interesting behaviors of applications and smartphones: the performance of some smartphones with higher hardware specifications is 1.5 times less than the phones with lower specifications. DPA is now publicly available as an open source tool.
遊戲音樂進化史
(2016-05-01)
吳維倫
;
Department of Communication and Technology
;
傳播與科技學系
電子遊戲音樂，隨著科技的進步與人性的需求，變得越來越精緻。