Browsing by Issue Date, starting with "2014-05-19"

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An electrically tunable imaging system with separable focus and zoom functions using composite liquid crystal lenses
(2014-05-19)
Chen, Ming-Syuan
;
Chen, Po-Ju
;
Chen, Michael
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Lin, Yi-Hsin
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光電工程學系
We demonstrated an electrically tunable optical image system with separable focus function and zoom function based on three tunable focusing composite liquid crystal (LC) lenses. One LC lens in charge of the focus function helps to maintain the formed image at the same position and the other two LC lenses in charge of zoom function assist to continuously form an image at image sensor with tunable magnification of image size. The detail optical mechanism is investigated and the concept is demonstrated experimentally. The magnifications of the images can be switched continuously for the target in a range between 10 cm and 100 cm. The optical zoom ratio of this system maintains a constant similar to 6.5:1 independent of the object distance. This study provides not only a guideline to design the image system with an electrically optical zoom, but also provide an experimental process to show how to operate the tunable focusing lenses in such an image system. (C) 2014 Optical Society of America
The understanding of the drain-current fluctuation in a silicon-carbon source-drain strained n-channel metal-oxide-semiconductor field-effect transistors
(2014-05-19)
Hsieh, E. R.
;
Chung, Steve S.
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電子工程學系及電子研究所
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Department of Electronics Engineering and Institute of Electronics
In a certain class of strained n-channel metal-oxide-semiconductor field effect transistor (MOSFET) with silicon-carbon (Si:C) as a stressor in its source/drain, it serves as good candidate for high mobility and drain current device. However, its drain current (I-d) fluctuation and the threshold voltage (Vth) fluctuation, have not been clarified. This paper reports a systematic method to analyze the sources of the above two different fluctuations represented by sigma I-d and sigma Vth, respectively. The dominant sources of the sigma I-d and sigma Vth have been clarified on experimental n-channel Si:C source/drain FETs. The I-d fluctuation relies on the dopant fluctuation or the mobility factors related to the conductions at various biases. Results show that the I-d fluctuation at low field or low gate bias, i.e., near the threshold, is dominated by the RDF (Random Dopant Fluctuation) effect, while at high field, it is dominated by the channel conduction and scattering events which can be adequately described by the changes of mobility. The abnormal increase in the RDF effect in the Si:C was induced by the carbon out-diffusion from the drain into the channel. A dopant profiling technique has been developed to validate the out-diffusion effect. (C) 2014 AIP Publishing LLC.
從山田洋次的武士三部曲看日本
(2014-05-19)
藍弘岳
;
開放教育推動中心
;
Open Education Office
課程首頁本課程是由交通大學新文藝復興閱讀計畫提供。 96 年 8 月當各大學紛紛摩拳擦掌準備迎接新生的同時，交通大學校長吳重雨則因為一則來自於七月份泰晤士報，有關於英國首相布朗公布其夏日讀書清單的新聞中，看到了他對知識的尊重。在這同時，吳重雨校長也思考著，要如何為學生準備追求知識的環境和激發他們對知識的尊重與喜愛。台積電張忠謀董事長曾陳述他 18 歲進入哈佛那一年，博覽文史哲理工經典群籍，至此奠定了他求知的基礎，並借海明威名言，將其改為「哈佛這一年為人生可帶走的盛宴。」吳重雨校長以張董事長的學習為借鏡，認為學生固然能藉由自我閱讀的方式學習到豐沛的知識，但透過名人、大師親臨現場地介紹經典書籍，更能加深學子們對於書籍的認識與興趣，這也是「新文藝復興閱讀計劃」 ( 以下簡稱 : 「經典名著選讀」 ) 活動展開籌劃的緣由。於是，吳重雨校長便積極敦請「交大通識教育委員會」，接手籌備本計劃的相關活動，而該中心也成為實際施行本計畫的策動、開課以及認證單位。至此，期許交大學子藉由閱讀、聽講來提昇人文素養、開拓視野的「新文藝復興閱讀計劃」，就此展開。
Inertial effects in adiabatically driven flashing ratchets
(2014-05-19)
Rozenbaum, Viktor M.
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Makhnovskii, Yurii A.
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Shapochkina, Irina V.
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Sheu, Sheh-Yi
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Yang, Dah-Yen
We study analytically the effect of a small inertial correction on the properties of adiabatically driven flashing ratchets. Parrondo's lemma [J. M. R. Parrondo, Phys. Rev. E 57, 7297 (1998)] is generalized to include the inertial term so as to establish the symmetry conditions allowing directed motion (other than in the overdamped massless case) and to obtain a high-temperature expansion of the motion velocity for arbitrary potential profiles. The inertial correction is thus shown to enhance the ratchet effect at all temperatures for sawtooth potentials and at high temperatures for simple potentials described by the first two harmonics. With the special choice of potentials represented by at least the first three harmonics, the correction gives rise to the motion reversal in the high-temperature region. In the low-temperature region, inertia weakens the ratchet effect, with the exception of the on-off model, where diffusion is important. The directed motion adiabatically driven by potential sign fluctuations, though forbidden in the overdamped limit, becomes possible due to purely inertial effects in neither symmetric nor antisymmetric potentials, i.e., not for commonly used sawtooth and two-sinusoid profiles.
Spectral dependence of third-order nonlinear optical properties in InN
(2014-05-19)
Ahn, H.
;
Lee, M. -T.
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Chang, Y. -M.
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光電工程學系
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Department of Photonics
We report on the nonlinear optical properties of InN measured in a wide near-infrared spectral range with the femtosecond Z-scan technique. The above-bandgap nonlinear absorption in InN is found to originate from the saturation of absorption by the band-state-filling and its cross-section increases drastically near the bandgap energy. With below-bandgap excitation, the nonlinear absorption undergoes a transition from saturation absorption (SA) to reverse-SA (RSA), attributed to the competition between SA of band-tail states and two-photon-related RSA. The measured large nonlinear refractive index of the order of 10(-10) cm(2)/W indicates InN as a potential material for all-optical switching and related applications. (C) 2014 AIP Publishing LLC.
Molecular Imaging of Ischemia and Reperfusion in Vivo with Mitochondria! Autofluorescence
(2014-05-20)
Lu, Hsueh-Han
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Wu, Yao-Ming
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Chang, Wei-Tien
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Luo, Teng
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Yang, Yi-Cyun
Ischemia and reperfusion (IR) injury constitutes a pivotal mechanism of tissue damage in pathological conditions such as stroke, myocardial infarction, vascular surgery, and organ transplant. Imaging or monitoring of the change of an organ at a molecular level in real time during IR is essential to improve our understanding of the underlying pathophysiology and to guide therapeutic strategies. Herein, we report molecular imaging of a rat model of hepatic IR with the autofluorescence of mitochondrial flavins. We demonstrate a revelation of the histological characteristics of a liver in vivo with no exogenous stain and show that intravital autofluorescent images exhibited a distinctive spatiotemporal variation during IR. The autofluorescence decayed rapidly from the baseline immediately after 20-min ischemia (approximately 30% decrease in 5 mm) but recovered gradually during reperfusion (to approximately 99% of the baseline 9 mm after the onset of reperfusion). The autofluorescent images acquired during reperfiision correlated strongly with the reperfused blood flow. We show further that the autofluorescence was produced predominantly from mitochondria, and the distinctive autofluorescent variation during IR was mechanically linked to the altered balance between the flavins in the oxidized and reduced forms residing in the mitochondrial electron-transport chain. Our approach opens an unprecedented route to interrogate the deoxygenation and reoxygenation of mitochondria, the machinery central to the pathophysiology of IR injury, with great molecular specificity and spatiotemporal resolution and can be prospectively translated into a medical device capable of molecular imaging. We envisage that the realization thereof should shed new light on clinical diagnostics and therapeutic interventions targeting IR injuries of not only the liver but also other vital organs including the brain and heart.
交大e-News第163期
(2014-05-20)
Secretariat
;
國立交通大學秘書室
Data inquiry system and method for three-dimensional location-based image, video, and information
(2014-05-20)
Tsao Shiao-Li
;
Lin Cheng-Lung
;
Lin Kaun-Ju
;
Chen Hsin-Chung
This invention discloses a data inquiry system for three-dimensional location-based image, video, and information, which comprises a client device and a remote server. The client device provides space parameters and lens parameters to the remote server through a transmission module. The remote server determines a space inquiry range by the space parameter and lens parameter, inquires an object data of an object space position parameter at the space inquiry range, shows the object data in an image data displayed by the client device to facilitate users to identify the desired viewing object, and further inquires the object data and related image and/or video data.
晶片電感結構及其製造方法
(2014-05-21)
鄭裕庭
;
趙子元
;
許名伽
;
陳智
;
劉健民
本發明係有關於一種晶片電感結構及其製造方法，其包含一基板、一多孔層、複數導體與一電感，多孔層設置於基板上方且有複數孔洞，該些導體分別設於該些孔洞，電感設置於多孔層上方。本發明藉由該些導體作為核心，如此可增加電感值，且可縮小晶片電感的面積，並降低生產成本，此外本發明之製造方法簡單，且相容於CMOS製程，而可降低生產成本。
影像環境邊界之動態設定方法及人員活動內容之即時判定方法
(2014-05-21)
宋開泰
;
陳維峻
一種影像環境邊界之動態設定方法，及應用該動態設定方法的人員活動內容之即時判定方法，所述的人員活動內容之即時判定方法包括：以預定角度擷取初始環境影像，俾計算出初始環境影像中的目標物及環境邊界之邊界設定關係式；利用移動平台以任意角度擷取包含目標物之動態環境影像，並利用邊界設定關係式及動態環境影像中的目標物位置計算出對應於動態環境影像之環境邊界；辨識出動態環境影像中的人員影像，並記錄人員影像的停留時間，且利用人員影像辨識出人員姿態；以及依據動態環境影像之環境邊界及所辨識出的人員影像判斷出人員所處區域，並利用人員所處區域、人員姿態及停留時間即時地判定出人員活動內容。
Topographical control of cell-cell interaction in C6 glioma by nanodot arrays
(2014-05-21)
Lee, Chia-Hui
;
Cheng, Ya-Wen
;
Huang, G. Steven
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材料科學與工程學系
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分子醫學與生物工程研究所
Nanotopography modulates the physiological behavior of cells and cell-cell interactions, but the manner of communication remains unclear. Cell networking ( syncytium) of astroglia provides the optimal microenvironment for communication of the nervous system. C6 glioma cells were seeded on nanodot arrays with dot diameters ranging from 10 to 200 nm. Cell viability, morphology, cytoskeleton, and adhesion showed optimal cell growth on 50-nm nanodots if sufficient incubation was allowed. In particular, the astrocytic syncytium level maximized at 50 nm. The gap junction protein Cx43 showed size-dependent and time-dependent transport from the nucleus to the cell membrane. The transport efficiency was greatly enhanced by incubation on 50-nm nanodots. In summary, nanotopography is capable of modulating cell behavior and influencing the cell-cell interactions of astrocytes. By fine-tuning the nanoenvironment, it may be possible to regulate cell-cell communications and optimize the biocompatibility of neural implants.
Polarization ratio enhancement of a-plane GaN light emitting diodes by asymmetric two-dimensional photonic crystals
(2014-05-21)
Chou, Yen
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Li, Hsiang-Wei
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Yin, Yu-Feng
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Wang, Yu-Ting
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Lin, Yen-Chen
Fabricating photonic crystals (PhCs) on GaN based non-polar light emitting diodes (LEDs) is an effective way to increase light extraction and meanwhile to preserve or improve polarization ratio. In this work, a-plane GaN LEDs with two-dimensional PhCs were demonstrated. With the E // m polarized modes (which mean the optical polarization with the electric field parallel to m-axis) as the target of diffraction, we matched E//m modes to the photonic bands and aligned E//c modes to fall within the photonic band gap. The results show stronger E//m but weaker E//c mode diffractions on both c- and m-axes. At the vertical direction, the polarization ratio is enhanced from 45.8% for the planar device to 52.3% for the LEDs with PhCs. (C) 2014 AIP Publishing LLC.
化合物及其合成方法
(2014-05-21)
許千樹
;
鄭彥如
;
吳忠憲
;
陳秋翔
;
張桓瑄
本發明藉由多種合環反應，合成含多種異原子芳香雜環之六、七及九環熔合之多電子給體。此外，本發明亦將多環熔合梯形多電子給體的共軛小分子與各類電子受體之共軛小分子連結起來，以形成P型共軛高分子。
METHOD FOR GROWING EPITAXIAL DIAMOND
(2014-05-22)
CHANG Li
;
WU Ping-Hsun
;
CHIU Kun-An
A method for growing epitaxial diamond is provided here. A metallic layer is deposited on a diamond substrate and is followed by an epitaxial diamond film deposited on top of the metallic layer. As a buffer layer, the metallic layer relieves stress accumulated in the thin film of the epitaxial diamond to prevent cracks. In consequence, diamond epitaxial layers with desired thickness and good quality can be obtained.
SYSTEM AND METHOD FOR REDUCING LOADS OF MOBILITY MANAGEMENT ENTITY (MME) IN CORE NETWORKS
(2014-05-22)
CHEN JYH-CHENG
;
TSAI MING-HONG
;
LIN YI-BING
;
SUNG YINGRONG CORAL
The present invention provides a system and method for reducing loads of a mobility management entity in core networks. An object sending a connection-request message asking for network access to a base station through a wireless network; the base station receiving the connection-request message and sending it to core networks through a network; a mobility management entity (MME) in the core network receive the connection-request message. If the core network is busy and refuses to interconnect with the object, MME calculating according to a management rule a back-off time; MME transmitting a response message including the back-off time to the object through the base station, and the object sending out a connection-request message again after the back-off time has elapsed according to the response message.
SLEEP APNEA DETECTION SYSTEM AND METHOD
(2014-05-22)
Fang Wai-Chi
;
Chen Hsiao-Yu
;
Huang Teng-Chieh
The invention provides a sleep apnea detection system and method. The system includes a detecting module, a processing module, a converting module and a determining module. The detecting module detects a plurality of peak time points of R-waves in an ECG (electrocardiograph) signal. The processing module calculates areas of the R-waves at a predetermined time range based on the peak time points, so as to produce a plurality of first R-wave area signals based on the areas and generate an EDR (ECG Derived Respiration) signal based on the peak time points and the first R-wave area signals. The converting module converts the EDR signal to a frequency signal. The determining module determines whether a maximum peak frequency of the frequency signal is at a first frequency segment or a second frequency segment to determine the frequency signal being an apnea signal or a normal breathing signal.
METHOD FOR EXTRACTING THE FEATURE OF AN ABDOMINAL BREATHING AND A SYSTEM USING THE SAME
(2014-05-22)
HSIAO Tzu-Chien
;
HSU Ju-Hsin
A method for extracting the feature of an abdominal breathing is disclosed, capable of extracting the feature of an abdominal breathing, without the requirement of a standard model of an abdominal breathing and the execution of a learning process being executed prior to the method for extracting the feature of an abdominal breathing. By means of computing a plurality of intrinsic mode functions corresponding to the abdominal breathing signal received, an Euler angle function and an instantaneous frequency function of each of the plurality of intrinsic mode functions, and comparing the plurality of instantaneous frequency function with a pre-determined zero-point threshold region, the method for extracting the feature of an abdominal breathing defines one of the plurality of instantaneous frequency function as an abdominal breathing feature function, which contains the feature of the abdominal breathing. In this way, the feature of an abdominal breathing is extracted.
Influence of Lubricant on the Nucleate Boiling Heat Transfer Performance of Refrigerant-A Review
(2014-05-24)
Wang, Chi-Chuan
;
Hafner, Armin
;
Kuo, Cheng-Shu
;
Hsieh, Wen-Der
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機械工程學系
This review provides an overview of the lubricant on the heat transfer performance pertaining to nucleate boiling. It appears that the effect of individual parameter on the heat transfer coefficient may be different from study to study. This is associated with the complex nature of lubricant and some compound effects accompanying the heat transport process. Some important effects such as oil concentration, heat flux, geometric configuration, saturation temperature, thermodynamic and transport properties, miscibility, foaming, and additional surface active agent are reported and discussed. In general, the heat transfer coefficient is impaired provided the oil concentration is sufficient high (e.g., >7%), and this is applicable to smooth and structured tubes. But normally structured tubes tend to suffer more from lubricant, yet this is especially conspicuous when the size of the reentrant channel is small. On the other hand, foaming and partial miscibility seem to benefit the heat transfer coefficient.
新興樂團　環保竹音樂
(2014-05-25)
陳韋琪
;
Department of Communication and Technology
;
傳播與科技學系
台灣竹樂團，又稱綠色環保樂團，以推廣本土竹音樂表演為宗旨，找尋音樂的自我定位。
背包客棧　感受濃濃人情味
(2014-05-25)
游瑀萱
;
Department of Communication and Technology
;
傳播與科技學系
住在背包客棧，雖然沒有寬闊的空間、高級的設施，但卻能感受到其中濃濃的人情味。