Browsing by Issue Date, starting with "2012-10-08"

Now showing 1 - 20 of 35269

Deformation behaviors of InP pillars under uniaxial compression
(2012-10-08)
Jian, Sheng-Rui
;
Sung, T. -H.
;
Huang, J. C.
;
Juang, Jenh-Yih
;
電子物理學系
We report the deformation behavior of single-crystal InP(100) micropillars, measuring about 1 mu m in diameter and 2 mu m in height, subjected to uniaxial compression at room temperature. The engineering stress-strain results indicated that the yield strength of InP pillar is about 2.5 GPa, and the presence of a drastic strain burst right after yielding. Cross-sectional transmission electron microscopy microstructural observations reveal the formation of extremely dense twins. The results indicate that the plastic deformation in InP micropillars is dominated by explosive generation of deformation twins under the high stress state. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4758479]
Demonstration of bi-directional LED visible light communication using TDD traffic with mitigation of reflection interference
(2012-10-08)
Liu, Y. F.
;
Yeh, C. H.
;
Chow, C. W.
;
Liu, Y.
;
Liu, Y. L.
In this work, we experimentally demonstrate a bi-directional transmission link using light emitting diode (LED) visible light communication (VLC) for both downlink and uplink paths. Time-division-duplex (TDD) is proposed and demonstrated to significantly eliminate the reflection interference in VLC. A free space bi-directional transmission of 2 m using simple on-off keying (OOK) modulation with bit error rate (BER) of < 10(-5) in both directions are achieved. Moreover, the influence of reflection interference is analyzed, showing the proposed scheme can significantly eliminate the reflection interference. (C) 2012 Optical Society of America
Resistive switching of Au/ZnO/Au resistive memory: an in situ observation of conductive bridge formation
(2012-10-08)
Peng, Chung-Nan
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Wang, Chun-Wen
;
Chan, Tsung-Cheng
;
Chang, Wen-Yuan
;
Wang, Yi-Chung
A special chip for direct and real-time observation of resistive changes, including set and reset processes based on Au/ZnO/Au system inside a transmission electron microscope (TEM), was designed. A clear conducting bridge associated with the migration of Au nanoparticles (NPs) inside a defective ZnO film from anode to cathode could be clearly observed by taking a series of TEM images, enabling a dynamic observation of switching behaviors. A discontinuous region (broken region) nearby the cathode after reset process was observed, which limits the flow of current, thus a high resistance state, while it will be reconnected to switch the device from high to low resistance states through the migration of Au NPs after set process. Interestingly, the formed morphology of the conducting bridge, which is different from the typical formation of a conducting bridge, was observed. The difference can be attributed to the different diffusivities of cations transported inside the dielectric layer, thereby significantly influencing the morphology of the conducting path. The current TEM technique is quite unique and informative, which can be used to elucidate the dynamic processes in other devices in the future.
The cooling effect on structural, electrical, and optical properties of epitaxial a-plane ZnO:Al on r-plane sapphire grown by pulsed laser deposition
(2012-10-08)
Peng, Chun-Yen
;
Liu, Yuan-An
;
Wang, Wei-Lin
;
Tian, Jr-Sheng
;
Chang, Li
Here, the unambiguous effect of cooling rate on structural, electrical, and optical properties of a-plane ZnO:Al on r-plane sapphire grown by pulsed laser deposition at 700 degrees C is reported. A high cooling rate (similar to 100 degrees C/min) can result in stripe morphology along m-direction and significant deformation on the epitaxial films of a-plane ZnO:Al with deteriorated crystallinity and significantly lowered resistivity. Also, photoluminescence spectra exhibit high intensities of excess violet and green emissions with low intensity of near band edge luminescence. Comparison with pure a-plane ZnO films is also presented. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4759032]
Biomedical electric wave sensor
(2012-10-09)
Chen Yu-Han
;
Chao Paul C.-P.
;
Liao Lun-De
;
Lin Chin-Teng
;
Chen Jian-Ting
A biomedical electric wave sensor includes a base, a central pole, a dry electrode, a case, and a plurality of ribs. When the central pole lowers down, the ribs radiate and expand outward to push aside the hair of a subject, and the dry electrode exposes from the case and contacts the skin of the subject to measure a physiological electric wave signal from the subject. The present invention may overcome the intervention problem caused by hair and achieve the measurement of biomedical electric wave signal.
Characteristics and prevalence of KRAS, BRAF, and PIK3CA mutations in colorectal cancer by high-resolution melting analysis in Taiwanese population
(2012-10-09)
Hsieh, Li-Ling
;
Er, Tze-Kiong
;
Chen, Chih-Chieh
;
Hsieh, Jan-Sing
;
Chang, Jan-Gowth
Background: The identification of KRAS, BRAF, and PIK3CA mutations before the administration of anti-epidermal growth factor receptor therapy of colorectal cancer has become important The aim of the present study was to investigate the occurrence of KRAS, BRAF, and PIK3CA mutations in the Taiwanese population with colorectal cancer. This study was undertaken to identify BRAF and PIK3CA mutations in patients with colorectal cancer by high-resolution melting (HRM) analysis. HRM analysis is a new gene scan tool that quickly performs the PCR and identifies sequence alterations without requiring post-PCR treatment Methods: In the present study, DNAs were extracted from 182 cases of formalin-fixed, paraffin-embedded (FFPE) colorectal cancer samples for clinical KRAS mutational analysis by direct sequencing. All the samples were also tested for mutations within BRAF V600E and PIK3CA (exons 9 and 20) by HRM analysis. Results: The results were confirmed by direct sequencing. The frequency of BRAF and PIK3CA mutations is 1.1%, and 7.1%, respectively. Intriguingly, we found that nine patients (4.9%) with the KRAS mutation were coexistent with the PIK3CA mutation. Four patients (22%) without the KRAS mutation were existent with the PIK3CA mutation. Two patients (1.1%) without the KRAS mutation were existent with the BRAF mutation. Conclusions: In the current study, we suppose that HRM analysis is rapid, feasible, and powerful diagnostic tool for the detection of BRAF and PIK3CA mutations in a clinical setting. Additionally, our results indicated the prevalence of KRAS. BRAF, and PIK3C4 mutational status in the Taiwanese population. (C) 2012 Elsevier B.V. All rights reserved.
兆赫波極化器的結構
(2012-10-11)
趙如蘋
;
潘犀靈
;
謝卓帆
;
賴玉倩
本發明之兆赫波極化器的結構，包括：一對互相平行的石英片形成內部具有間隙的長方體，具有雙折射係數液態晶體層夾置於間隙內封止後，將一對磁極相反的永久磁鐵置於該對石英片之二側。
Interface dipole between two metallic oxides caused by localized oxygen vacancies
(2012-10-11)
Borisevich, Albina Y.
;
Lupini, Andrew R.
;
He, Jun
;
Eliseev, Eugene A.
;
Morozovska, Anna N.
Oxygen vacancies are increasingly recognized to play a role in phenomena observed at transition-metal oxide interfaces. Here, we report a study of SrRuO3 and La0.7Sr0.3MnO3 interfaces using a combination of quantitative aberration-corrected scanning transmission electron microscopy, electron energy-loss spectroscopy, and density functional calculations. Cation displacements are observed at the interface, indicative of a dipolelike electric field even though both materials are nominally metallic. The observed displacements are reproduced by theory if O vacancies are present in the near-interface La0.7Sr0.3MnO3 layers. The results suggest that atomic-scale structural mapping can serve as a quantitative indicator of the presence of O vacancies at interfaces.
Highly hydrated Nafion/activated carbon hybrids
(2012-10-12)
Chien, Hung-Chung
;
Tsai, Li-Duan
;
Kelarakis, Antonios
;
Lai, Chien-Ming
;
Lin, Jiunn-Nan
The incorporation of highly porous activated carbon (aC) to Nafion membranes confers unprecedented levels of water uptake (4 times higher for 10 wt% aC compared to neat Nafion) at a minimal dimensional swelling and results in dramatic enhancements in ionic conductivity at low relative humidity. This behavior reveals the development of a robust network of water nanochannels formed by the carbon pores and the polymeric ionic domains which are structurally stabilized by the rigid Nafion backbone and the non-deformable aC particles. (c) 2012 Elsevier Ltd. All rights reserved.
Modeling aquifer-system compaction and predicting land subsidence in central Taiwan
(2012-10-12)
Hung, Wei-Chia
;
Hwang, Cheinway
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Liou, Jyh-Chau
;
Lin, Yan-Syun
;
Yang, Hsiu-Lung
Changhua is a county in central Taiwan that will house several major economic development projects. Extracting groundwater has caused large-scale land subsidence in Changhua, with the largest cumulative subsidence being 210 cm over 1992-2010. A multi-sensor monitoring system consisting of continuous GPS stations, a leveling network, multi-layer compaction monitoring wells and groundwater wells is deployed to monitor land subsidence and its mechanism in Changhua. Data from the monitoring well CGSG in Dacheng Township of Changhua show a cumulative compaction of 110.6 cm over 1997-2010, occurring mainly at two aquifers and one aquitard. A novel combination of GPS and monitoring well data was used to determine the stress-strain relations. The stratum compaction turns from plasticity to elastoplasticity after a long-term compaction at the second aquifer below the surface. Four hydrogeological parameters of the three sediment layers in Dacheng, vertical hydraulic conductivity, elastic skeletal specific storage, inelastic skeletal specific storage, and the initial maximum preconsolidation stress, in the one-dimensional compaction model COMPAC, are estimated using the genetic algorithm. With the parameters. COMPAC predicts compactions to an accuracy consistent with in situ measurements, and the mean absolute percentage errors of prediction are below 10%. The result provides a key reference for water management in central Taiwan. (C) 2012 Elsevier B.V. All rights reserved.
A Novel Sensory Mapping Design for Bipedal Walking on a Sloped Surface
(2012-10-12)
Wu, Chiao-Min
;
Huang, Chao-Ping
;
Hsieh, Chang-Hung
;
Song, Kai-Tai
;
電子工程學系及電子研究所
This paper presents an environment recognition method for bipedal robots using a time-delay neural network. For a robot to walk in a varying terrain, it is desirable that the robot can adapt to any environment encountered in real-time. This paper aims to develop a sensory mapping unit to recognize environment types from the input sensory data based on an artificial neural network approach. With the proposed sensory mapping design, a bipedal walking robot can obtain real-time environment information and select an appropriate walking pattern accordingly. Due to the time-dependent property of sensory data, the sensory mapping is realized by using a time-delay neural network. The sensory data of earlier time sequences combined with current sensory data are sent to the neural network. The proposed method has been implemented on the humanoid robot NAO for verification. Several interesting experiments were carried out to verify the effectiveness of the sensory mapping design. The mapping design is validated for the uphill, downhill and flat surface cases, where three types of environment can be recognized by the NAO robot online.
踏上一條顛簸不平的菸路
(2012-10-14)
王柔婷
;
Department of Communication and Technology
;
傳播與科技學系
依「成人吸菸行為調查」顯示，台灣目前成人吸菸率約為百分之二十，平均每五位成人就有一位吸菸。吸菸對身體健康不好，眾所皆知。不過，吸菸非犯罪。在不影響他人的情況下，吸菸的決定權掌握在自己手中。畢竟，沒有人有權力干涉他人對待身體健康的方式。
愛與夢　在時代裡迷路
(2012-10-14)
柯佳妤
;
Department of Communication and Technology
;
傳播與科技學系
領著別人走，帶著隊伍前進，當走回自己生命，帶路的人，卻不小心迷了路。《女朋友。男朋友》故事裡的人，走進大時代的迷宮裡，穿過戒嚴，走出學運，卻走不出自己的命運。
我　與我的那些夢
(2012-10-14)
郭丹穎
;
Department of Communication and Technology
;
傳播與科技學系
什麼是夢想？當時的我不清楚，只知道，去做就對了。於是，運動員、表演者的夢想開始，我在聚光燈下欲罷不能。
真相中的謊言
(2012-10-14)
林慰
;
Department of Communication and Technology
;
傳播與科技學系
希敏與丈夫納德在意見相左的情況下，決定離婚，卻被法院駁回。無奈下，她只好暫時搬回娘家，納德則請了看護羅芝照顧父親。然而納德與羅芝的一次爭執，卻意外引發了一連串的風暴。
總編輯的話
(2012-10-14)
謝昌錡
;
Department of Communication and Technology
;
傳播與科技學系
喀報進入至一四四期，而本期共有二十七篇報導。在本期中，文化現象占大多數，而本期出現了過去兩期未刊登過的欄目－人物報導，其他欄目則以書評、影居多；動新聞方面結合了本週時事。
從遊戲出來的歷史　洪維揚
(2012-10-14)
張睿文
;
Department of Communication and Technology
;
傳播與科技學系
遊戲，常使許多人沉迷其中不可自拔，但當遊戲不只是遊戲，而發展為一種專業又是如何呢？洪維揚從玩遊戲到接觸歷史，再從學歷史到出書，希望透過出書的方式，詮釋自己對歷史的看法，並給予讀者一個清晰易懂的史觀。
優游音樂的魚
(2012-10-14)
王蒂鷹
;
Department of Communication and Technology
;
傳播與科技學系
隨著富強烈節奏的搖滾樂音，以及帶著科技感的電子音樂流洩而出的，是山口一郎清亮的歌聲。「黑夜／請不要試探我們……」反複的歌詞，加上電子音樂單調而重覆的特性，如同大鼓打著節奏般，一遍遍地敲打著人心。
致F　與我激情的失語症
(2012-10-14)
李佩玹
;
Department of Communication and Technology
;
傳播與科技學系
「年輕就是／一吹口哨你就穿著泳褲往下跳／拍拍手就把你從另一頂帽子拎出來」─鯨向海。想回頭的時候，就自私地想像著你在海上的堤防等我，眼睛笑成兩條瞇瞇的弧線，準備再一次把我拎出來，擰乾、再製、重新粉刷。
急救訓練　肯定生命價值
(2012-10-14)
簡瑋靜
;
Department of Communication and Technology
;
傳播與科技學系
交通大學衛生保健組於十月十日，舉辦一日急救訓練活動。希望透過經驗分享及實際操作，教導學生急救技能和幫助他人的勇氣。急救能夠在緊急時拯救自身或是他人性命，不過，最重要的還是對危險保持警覺心，避免傷害的發生。