Browsing by Issue Date, starting with "2015-04-06"

Now showing 1 - 20 of 22020

Efficient hybrid white light-emitting diodes by organic-inorganic materials at different CCT from 3000K to 9000K
(2015-04-06)
Chen, Kuo-Ju
;
Lai, Yi-Chun
;
Lin, Bin-Cheng
;
Lin, Chien-Chung
;
Chiu, Sheng-Huan
The hybrid white light-emitting didoes (LED) with polyfluoren (PFO) polymer and quantum dot (QD) was investigated using dispensing method at the different correlated color temperature (CCT) for cool and warm color temperature. This result indicates that the hybrid white LED device has the higher luminous efficiency than the convention one, which could be attributed to the increased utilization rate of the UV light. Furthermore, the CIE 1931 coordinate of high quality white hybrid LED with different CCT range from 3000K to 9000K is demonstrated. Consequently, the angular-dependent CCT and the thermal issue of the hybrid white LED device were also analyzed in this study. (C) 2015 Optical Society of America
Dual view capsule endoscopic lens design
(2015-04-06)
Sheu, Ming-Jen
;
Chiang, Che-Wen
;
Sun, Wen-Shing
;
Wang, Jhi-Joung
;
Pan, Jui-Wen
A dual view capsule endoscopic (DVCE) lens is proposed with front view and back view functions. This is a hybrid lens with a catadioptric mirror and an aspherical surface to support both view functions. The field of view (FOV) for the front view function is 90 degrees. The FOV for the back view function is 260 to 290 degrees. The TV distortion for the front view and back view function is under 30% and 25%. The corner relative illuminations for the two view functions are above 0.53. The Modulation Transfer Function (MTF) performance at the Nyquist Frequency for the two view functions can be kept above 0.35, even under tolerance they can remain above 0.2. Moreover, the telecentric conditions at the image plane of the DVCE system can support constant magnification through focusing. This condition can reduce the measurement error by slightly defocusing of the lens. Thus, the two view functions can offer physicians a wide viewing angle to deal with lesions over the fold. (C)2014 Optical Society of America
Self-reset transient-to-digital convertor and electronic product utilizing the same
(2015-04-07)
Ker Ming-Dou
;
Yen Cheng-Cheng
;
Chen Tung-Yang
;
Tsai Ching-Ling
;
Chen Shih-Fan
A self-reset transient-to-digital convertor which includes at least one transient detection circuit is disclosed. The transient detection circuit, coupled between a first power line and a second power line, includes at least one voltage drop unit, a current amplifier unit, and a time control unit. When an ESD event occurs, the voltage drop unit is conducted to pass through an ESD current. The current amplifier unit, coupled between the voltage drop unit and the first power line, is conducted by the ESD current to set the level of a first node. The time control unit, coupled between the first node and the second power line, is configured to gradually drain the ESD current away. Wherein, each of the transient detection circuit generates a digital code according to the level of the first node.
A mist pluviation method for reconstituting silty sand specimens
(2015-04-07)
Huang, An-Bin
;
Chang, Wen-Jong
;
Hsu, Huai-Houh
;
Huang, Yu-Jie
;
土木工程學系
A mist pluviafion (MP) technique was proposed in an effort to develop a practical method for reconstituting silty sand specimens without inducing severe particle segregation. The mist pluviation method includes both air and water pluviation processes, with the addition of a mist zone that mixes soil particles with water droplets while falling through air. The soil and water mixtures have similar particle sizes, thus resulting in significantly reduced particle segregation. A thin water layer on top of the deposited soil mimics the water deposition process, and saturates the soil with little chance for particle segregation. The performance of the MP method was evaluated with regard to homogeneity, repeatability, undrained monotonic compression, and cyclic strength of triaxial specimens with various fines contents. Results have indicated that the MP method can be a promising technique to prepare reconstituted silty sand specimens. (C) 2015 Elsevier B.V. All rights reserved.
交大e-News第183期-大專盃零敗紀錄交大棒球隊場場called game輕取總冠軍！
(2015-04-07)
國立交通大學秘書室
;
Secretariat
Synergistic Plasmonic Effects of Metal Nanoparticle-Decorated PEGylated Graphene Oxides in Polymer Solar Cells
(2015-04-08)
Chuang, Ming-Kai
;
Chen, Fang-Chung
;
光電工程學系
;
Department of Photonics
Metal nanostructures that trigger plasmonic near-field effects are often incorporated in organic photovoltaic devices (OPVs) to improve their light-harvesting ability. These nanostructures usually can be positioned in two different locations in a device: (i) within the photon absorption layers and (ii) at the interfaces between the active layer and the metal electrodes. In this study, we developed amphiphilic gold nanoparticles (Au NPs) for use in dual plasmonic nanostructures within OPVs. We employed graphene oxide as the template to anchor the Au NPs, thereby avoiding their aggregation. Furthermore, we added poly(ethylene glycol) (PEG) bis(amine) to the synthesis medium to improve the solubility of the nanocomposites, such that they could be dispersed well in water and in several organic solvents. Accordingly, we could incorporate the PEGylated Au NP/graphene oxides readily into both the buffer layer and photoactive layer of OPVs, which, as a result, exhibited obvious enhancements in their photocurrents and overall device efficiencies. Moreover, we observed different spectral enhancement regions when we positioned the nanocomposites at different locations, reflecting the different dielectric environments surrounding the NPs; this unexpected behavior should assist in enhancing the broadband absorption of solar irradiation.
METHOD AND ELECTRONIC APPARATUS FOR ANGLE ESTIMATION VERIFICATION
(2015-04-09)
Tsai Tsung-Yu
;
Huang Chung-Jung
;
Lee Ta-Sung
A method for angle estimation verification, adapted for verifying an estimated angle calculated by an electronic apparatus having an angle estimator and at least three antennas, is provided. The estimated angle is extracted from the angle estimator. An autocorrelation matrix is generated according to a signal vector formed by a plurality of measurements of a received signal received by each of the antennas so as to obtain a plurality of eigenvalues. Among phase difference data generated by a plurality of antenna groups formed by all different combinations of two of the antennas, a plurality of possible estimated angles corresponding to the phase difference data not caused by a coterminal angle effect are calculated. According to the eigenvalues and the possible estimated angles, whether the received signal corresponds to a single target or multiple targets is determined so as to verify the reliability of the estimated angle.
VEHICULAR COMMUNICATION SYSTEM AND ROUTING METHOD THEREOF
(2015-04-09)
Hsieh Yi-Ling
;
Wang Kuo-Chen
The invention discloses a vehicular communication system and a routing method thereof. The routing method includes the following steps. When a first relay node of the relay nodes, which locates in a last road slot of each of the road section, receives the route reply packet, the first relay node is configured to obtain a plurality of moving traces of a plurality of specific relay nodes according to the route reply packet; estimate at least one connection life period related to a plurality of specific road slots according to the moving traces; estimate at least one connection available interval of the specific road section according to the at least one connection life period; and append the at least one connection available interval to the route reply packet and forward the route reply packet.
PORTABLE PUPIL DETECTION DEVICE WITH MULTIBAND STIMULATING LIGHT AND INFRARED ILLUMINATION
(2015-04-09)
OU-YANG MANG
;
CHIOU JIN-CHERN
;
KO MEI-LAN
;
HUANG TING-WEI
;
JHUANG JYUN-WEI
The present invention discloses a portable pupil detection device with multiband stimulating light and infrared illumination, which comprises at least one pupil detection module for detecting the variation of the pupil of the testee. Each pupil detection module includes an illuminating light source emitting invisible light beams; a stimulating light source emitting visible light beams; at least one beamsplitter corresponding to the illuminating light source, the stimulating light source and an eye of the testee, cooperating with the illuminating light source and the eye to form a first optical path, and cooperating with the stimulating light source and the eye to form a second optical path; a lens corresponding to the beamsplitter and receiving the invisible light beams sent out by the beamsplitter to form an image of the eye; and an imaging element receiving the image of the eye from the lens.
The frequency of CFVD speed report for highway traffic
(2015-04-10)
Chang, Ming-Feng
;
Chen, Chi-Hua
;
Lin, Yi-Bing
;
Chia, Chung-Yung
;
資訊工程學系
The control signals of cellular networks have been used to infer the traffic conditions of the road network. In particular, consecutive handover events are being used to estimate the traffic speed. During traffic congestion, consecutive handover events may be rare because vehicles move slowly, and thus very few or no speed reports would be generated from the congested area.However, the traffic speed report rate during traffic congestion has not been investigated in the literature. In this paper, we present an analytic model to estimate the speed report rate from cellular network signaling in steady traffic conditions, that is, the traffic speed and flow are assumed constant. Real field trial data were used to validate our analytic model. In addition, computer simulations were conducted to study how speed reports are generated in dynamic traffic conditions when traffic speed and flow change rapidly. Our study indicates that in a typical cell of length 1.5km with a typical expected call holding time of 1min, no speed report was generated from a congested three-lane highway. Our study demonstrates that the lack of speed reports from consecutive handover events during rush hours indicates severe traffic congestion, and new methods that can estimate traffic speed from cellular network data during severe traffic congestion need to be developed. Copyright (c) 2013 John Wiley & Sons, Ltd.
Dual-band voltage controlled oscillator with optimized Gm
(2015-04-10)
Huang, Zhe-Yang
;
Chen, Chun-Chieh
;
Hung, Chung-Chih
;
電機資訊學士班
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Undergraduate Honors Program of Electrical Engineering and Computer Science
A differential VCO with differential push-push frequency doubler for dual-band application is proposed. The dual-band VCO (DB-VCO) adopts the tunable -Gm to optimize the wide tuning start-up condition. The proposed DB-VCO was implemented in 180-nm CMOS process. The DB-VCO provides a fundamental center frequency at 4.476 GHz and a double frequency at 8.985 GHz. A tuning range of fundamental frequency is 1.125 GHz (3.928 GHz-5.053 GHz), and a tuning range of the double frequency is 2.257 GHz (7.856 GHz-10.113 GHz) with maximum control voltage of 1.0 V can be achieved. The phase noise is -96.0 dBc/Hz at 1 MHz offset from center of the DB-VCO fundamental frequency. And the phase noise is -86.4 dBc/Hz at 1 MHz offset from center of the DB-VCO double frequency. The power dissipation of the DB-VCO core is 6.6 mW through 1.0 V supply voltage. The active area is 0.09 mm(2).
具有二氧化碳捕集功能之微藻養殖裝置及方法
(2015-04-11)
張嘉修
;
林志生
;
陳俊延
;
高千雅
本發明為一種直立管柱、可聯結式微藻類養殖系統及其實施方法。該養殖系統係具有複數個直立設置之透明管柱，這些單一管柱可透過其上之歧管結構一起串聯或並聯運作，管柱底部設有曝氣裝置，用於通入含二氧化碳氣體，利用氣舉方式攪動、循環管柱內所養殖的微藻液，使系統於生產微藻生物質的過程中，同時達到二氧化碳的減量。
甜點產業　甜蜜崛起
(2015-04-12)
張薇
;
Department of Communication and Technology
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傳播與科技學系
多元食品的流入，讓「吃」不再只是求溫飽，更多了娛樂與傳遞文化的功能。
衝突鑽石　最昂貴的代價
(2015-04-12)
陳怡均
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Department of Communication and Technology
;
傳播與科技學系
衝突鑽石，隱含著非洲大陸上經歷資源掠奪後留下的血腥記憶。
總編輯的話
(2015-04-12)
張婷芳
;
Department of Communication and Technology
;
傳播與科技學系
本周喀報為二一一期，共有18篇稿件。本期共有新聞圖表6則、動畫4則、照片1則與文字7則。
色彩心理學　生活應用大
(2015-04-12)
李恬芳
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Department of Communication and Technology
;
傳播與科技學系
紅色、藍色、黃色、綠色，色彩心理學在一定程度上左右著人們的決策。
過往足跡　臺灣古蹟　
(2015-04-12)
包金
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Department of Communication and Technology
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傳播與科技學系
簡述臺灣古蹟如何分類，以及各地的古蹟多寡。
美感計畫　翻轉臺灣教育
(2015-04-12)
謝宜寧
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Department of Communication and Technology
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傳播與科技學系
張柏韋，美感計畫的發起人之一。他們推出全臺第一本具有美學觀念的教科書，改革臺灣的美學教育。
程剛　心細的壺雕高手
(2015-04-12)
陳珮容
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Department of Communication and Technology
;
傳播與科技學系
程剛二十多年的雕刻經驗，無論在雕刻動物、人物，都能掌握神韻及景物的層次，即便是背景的樹葉依舊不含糊。
跨時代攻殼　反思未來科技
(2015-04-12)
侯怡安
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Department of Communication and Technology
;
傳播與科技學系
押井守於一九九五年的電影【攻殼機動隊】，除故事本身對於靈魂和軀體的哲學性探討外，其跨時代意義深遠。