Browsing by Issue Date, starting with "2016-12-12"

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GaN-based vertical-cavity surface emitting lasers with sub-milliamp threshold and small divergence angle
(2016-12-12)
Yeh, P. S.
;
Chang, C. -C.
;
Chen, Y. -T.
;
Lin, D. -W.
;
Liou, J. -S.
A GaN-based vertical-cavity surface emitting laser (VCSEL) structure featuring a silicon-diffusion-defined current blocking layer for lateral confinement is described. Sub-milliamp threshold currents were achieved for both 3- and 5-mu m-aperture VCSELs under continuous-wave operation at room temperature. The vertical cavity was defined by a top dielectric distributed Bragg reflector (DBR) and a bottom epitaxial DBR. The emission spectrum exhibited a single peak at 411.2 nm with a line-width of 0.4nm and a side mode suppression ratio of more than 10 dB before device packaging. The full-width-at-half-maximum divergence angle of the 3-mu m-aperture VCSEL was as small as approximately 5 degrees which is the lowest number reported. These results implied the 3-mu m-aperture VCSEL was in near single-mode operation. Published by AIP Publishing.
Perceived Occupational Stress is associated with Decreased Cortical Activity of the Prefrontal Cortex: A Multichannel Near-infrared Spectroscopy Study
(2016-12-13)
Chou, Po-Han
;
Lin, Wei-Hao
;
Hung, Chao-An
;
Chang, Chiung-Chih
;
Li, Wan-Rung
Despite an increasing number of reports on the associations between chronic occupational stress and structural and functional changes of the brain, the underlying neural correlates of perceived occupational stress is still not clear. Perceived stress reflects the extents to which situations are appraised as stressful at a given point in one's life. Using near-infrared spectroscopy, we investigated the associations between perceived occupational stress and cortical activity over the bilateral frontotemporal regions during a verbal fluency test. Sixty-eight participants (17 men, 51 women), 20-62 years of age were recruited. Perceived occupational stress was measured using the Chinese version of Job Content Questionnaire, and the Chinese version of the Copenhagen Burnout Inventory. We found statistically significant negative associations between occupational burnout and brain cortical activity over the fronto-polar and dorsolateral prefrontal cortex during the VFT (r = -0.343 to -0.464). In conclusion, our research demonstrated a possible neural basis of perceived occupational stress that are distributed across the prefrontal cortex.
Pleiotropic Effects of Myocardial MMP-9 Inhibition to Prevent Ventricular Arrhythmia
(2016-12-14)
Weng, Ching-Hui
;
Chung, Fa-Po
;
Chen, Yao-Chang
;
Lin, Shien-Fong
;
Huang, Po-Hsun
Observational studies have established a strong association between matrix metalloproteinase-9 (MMP-9) and ventricular arrhythmia. However, whether MMP-9 has a causal link to ventricular arrhythmia, as well as the underlying mechanism, remains unclear. Here, we investigated the mechanistic involvement of myocardial MMP-9 in the pathophysiology of ventricular arrhythmia. Increased levels of myocardial MMP-9 are linked to ventricular arrhythmia attacks after angiotensin II (Ang II) treatment. MMP-9-deficient mice were protected from ventricular arrhythmia. Increased expressions of protein kinase A (PKA) and ryanodine receptor phosphorylation at serine 2808 (pS2808) were correlated with inducible ventricular arrhythmia. MMP-9 deficiency consistently prevented PKA and pS2808 increases after Ang II treatment and reduced ventricular arrhythmia. Calcium dynamics were examined via confocal imaging in isolated murine cardiomyocytes. MMP-9 inhibition prevents calcium leakage from the sarcoplasmic reticulum and reduces arrhythmia-like irregular calcium transients via protein kinase A and ryanodine receptor phosphorylation. Human induced pluripotent stem cell-derived cardiomyocytes similarly show that MMP-9 inhibition prevents abnormal calcium leakage. Myocardial MMP-9 inhibition prevents ventricular arrhythmia through pleiotropic effects, including the modulation of calcium homeostasis and reduced calcium leakage.
Cobalt Oxide (CoOx) as an Efficient Hole-Extracting Layer for High Performance Inverted Planar Perovskite Solar Cells
(2016-12-14)
Shalan, Ahmed Esmail
;
Oshikiri, Tomoya
;
Narra, Sudhakar
;
Elshanawany, Mahmoud M.
;
Ueno, Kosei
CoOx is a promising hole-extracting layer (HEL) for inverted planar perovskite solar cells with device configuration ITO/CoOx/CH3NH3PbI3/PCBM/Ag. The devices fabricated according to a simple solution procedure showed the best photovoltaic performance attaining power conversion efficiency (PCE) of 14.5% under AM 1.5 G 1 sun irradiation, which is significantly superior to those of materials fabricated with a traditional HEL such as PEDOT:PSS (12.2%), NiOx (10.2%), and CuOx (9.4%) under the same experimental conditions. We characterized the chemical compositions with XPS, crystal structures with XRD, and film morphology with SEM/AFM techniques. Photoluminescence (PL) spectra and the corresponding PL decays for perovskite deposited on varied HEL films were recorded to obtain the hole-extracting characteristics, for which the hole extracting times show the order CoOx (2.8 ns) < PEDOT:PSS (17.5 ns) < NiOx (22.8 ns) < CuOx (208.5 ns), consistent with the trend of their photovoltaic performances. The reproducibility and enduring stability of those devices were examined to show the outstanding long-term stability of the devices made of metal oxide HEL, for which the CoOx device retained PCE approximate to 12% for over 1000 h.
Conformational analysis of ethyl-substituted Criegee intermediate by FTMW spectroscopy
(2016-12-14)
Cabezas, Carlos
;
Guillemin, Jean-Claude
;
Endo, Yasuki
;
應用化學系
;
Department of Applied Chemistry
Ethyl-substituted Criegee intermediate, C2H5CHOO, has been generated in the discharged plasma of a 1,1-diiodopropane/O-2 gas mixture and spectroscopically characterized by Fourier transform microwave spectroscopy in a pulsed supersonic jet. The comparison between the experimental rotational constants and those calculated ab initio unambiguously confirms the identification of three conformers, providing the definitive probe for their molecular structures. Some of the observed pure rotational transitions show small splittings corresponding to the A/E components due to the threefold methyl internal rotation, which made it possible to determine the barrier heights of the hindered methyl rotation. The conformational abundances as well as the non observation of a plausible fourth conformer have been rationalized in terms of interconversion processes between conformers and interactions between the terminal oxygen and the protons of the ethyl moiety. Published by AIP Publishing.
Heteroepitaxy of Fe3O4/Muscovite: A New Perspective for Flexible Spintronics
(2016-12-14)
Wu, Ping-Chun
;
Chen, Ping-Fan
;
Thi Hien Do
;
Hsieh, Ying-Hui
;
Ma, Chun-Hao
Spintronics has captured a lot of attention since it was proposed. It has been triggering numerous research groups to make their efforts on pursuing spin-related electronic devices. Recently, flexible and wearable devices are in a high demand due to their outstanding potential in practical applications. In order to introduce spintronics into the realm of flexible devices, we demonstrate that it is feasible to grow epitaxial Fe3O4 film, a promising candidate for realizing spintronic devices based on tunneling magnetoresistance, on flexible muscovite. In this study, the heteroepitaxy of Fe3O4/muscovite is characterized by X-ray diffraction, high-resolution transmission electron microscopy, and Raman spectroscopy. The chemical composition and magnetic feature are investigated by a combination of X-ray photoelectron spectroscopy and X-ray magnetic circular dichroism. The electrical and magnetic properties are examined to show the preservation of the primitive properties of Fe3O4. Furthermore, various bending tests are performed to show the tunability of functionalities and to confirm that the heterostructures retain the physical properties under repeated cycles. These results illustrate that the Fe3O4/muscovite heterostructure can be a potential candidate for the applications in flexible spintronics.
以證明標章及團體商標保護地理標示之研究
(交通大學科技法律學院（原名稱：交通大學科技法律研究所）, 2016-12-15)
許曉芬
;
Hsiao-Fen Hsu
地理標示是一逐漸演進、概念多元且國際上保護機制仍有相當爭議之智慧財產權類型。現今對於地理標示之保護模式，大致可區分為以下兩者：首先是以傳統商標制度，特別是證明標章或團體商標來保護具有強烈辨識地理區域需求地理標示，其次則是透過單獨立法之方式，賦予基於獨特地理環境而生之商品特殊保護。不論透過何者，通常會另輔以競爭法、消費者保護法、民法或其他行政規範，保護消費者不受虛假或引人錯誤標示訊息所混淆，或避免不當競爭。我國對於地理標示主要係透過傳統商標制度，特別是產地證明標章及產地團體商標，另外再輔以公平交易法或其他行政規定保護。然而，我國不論是規範、實務解釋或是實際運用上，皆有許多值得重新檢討。此外，主管機關似乎缺乏將規範與實務運作相互對照，亦未對已制定規範進行檢討評估。是故，本研究以我國法為中心，檢討在不同地理標示保護模式下，如何解決可能產生的衝突，並求相互利益之最佳平衡。換言之，地理標示的保護方式不應是擇一而互斥，基於其集體特性使然，地理標示必然帶有一定之群體性與公眾性。因此，當智慧財產權獨占本質與地理標示的群體性相衝突時，必須透過釐清與檢視不同規範的本質與功能，始能緩慢梳理出這一介於單獨立法（sui generis）、商標法間難解議題的脈絡。
Synergistic-Effect-Controlled CoTe2/Carbon Nanotube Hybrid Material for Efficient Water Oxidation
(2016-12-15)
Lu, Tzu-Hsiang
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Chen, Chih-Jung
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Lu, Ying-Rui
;
Dong, Chung-Li
;
Liu, Ru-Shi
In anode, electrocatalytic water splitting involves oxygen evolution reaction (OER), which is a complex and sluggish reaction, and thus the efficiency to produce hydrogen is seriously limited by OER. We report that CoTe2 exhibits optimized OER activity for the first time. Multiwalled carbon nanotube (MWCNT) is utilized to support CoTe2 in generating a synergistic effect to enhance OER activity and improve stability by tuning different loading amounts of CoTe2 on CNT. In 1.0 M KOH, bare CoTe2 needed overpotential of 323 mV to produce 10 mA/ cm(2) with Tafel slope of 85.1 mV/dec, but CoTe2/carbon nanotube (CNT) with optimized loading amount of CoTe2 required only 291 mV to produce10 mA/cm(2) with Tafel slope of 44.2 mV/dec. X-ray absorption near edge structure (XANES) was applied to prove that an electron transfer from e(g) band of CoTe2 to CNT caused a synergistic effect. This electron transfer modulated the bond strength of oxygen-related intermediate species on the surface and optimized OER performance. In situ XANES was used to compare CoTe2/CNT and pristine CoTe2 during OER. It proved the transition state of CoOOH more easily existed by adding CNT in hybrid material during OER to enhance the efficiency of OER. Moreover, bare CoTe2 is unstable under OER, but the CoTe2/CNT hybrid materials exhibited improved and exceptional durability by time dependent potentiostatic electrochemical measurement for 24 h and continuous cyclic voltammetry for 1000 times. Our result suggests that this new OER electrocatalyst for OER can be applied in various water-splitting devices and can promote hydrogen economy.
跨太平洋夥伴協定下的投資人對地主國仲裁機制──以ICSID與UNCITRAL仲裁程序之比較為中心
(交通大學科技法律學院（原名稱：交通大學科技法律研究所）, 2016-12-15)
高啟中
;
Chi-Chung Kao
國際區域經濟整合日趨熱絡，我國近年亦積極爭取加入如跨太平洋夥伴協定（TPP）的國際經貿協定。TPP 下的投保專章除制訂跨國投資之實體規範以外，亦明訂以仲裁作為投資人對地主國爭端解決（ISDS）機制之一，投資人得依解決國家與他國國民間投資爭端公約（ICSID 公約）向國際投資爭端解決中心（ICSID）提交仲裁，或依據ICSID 附加便利規則（AdditionalFacility Rules ）進行仲裁，或依循聯合國國際貿易法委員會仲裁規則（UNCITRAL Arbitration les）進行仲裁。此等程序除原則上尊重當事人自主原則以外，亦各自有其獨特設計與相異之處：如仲裁庭之主任仲裁人由當事人或仲裁人選任；是否採取促進程序效率的相關措施，如針對濫訴之異議、程序性諮商、庭前會議等；是否將仲裁程序透明化與公開仲裁相關資訊；仲裁判斷之救濟由何種機關審理；仲裁判斷的承認與執行之依據等。我國若加入TPP，對此等程序之適用有加以探究之必要。
Salinomycin enhances cisplatin-induced cytotoxicity in human lung cancer cells via down-regulation of AKT-dependent thymidylate synthase expression
(2016-12-15)
Ko, Jen-Chung
;
Zheng, Hao-Yu
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Chen, Wen-Ching
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Peng, Yi-Shuan
;
Wu, Chia-Hung
Salinomycin, a polyether antibiotic, acts as a highly selective potassium ionophore and has anticancer activity on various cancer cell lines. Cisplatin has been proved as chemotherapy drug for advanced human non-small cell lung cancer (NSCLC). Thymidylate synthase (TS) is a key enzyme in the pyrimidine salvage pathway, and increased expression of TS is thought to be associated with resistance to cisplatin. In this study, we showed that salinomycin (0.5-2 mu mL) treatment down-regulating of TS expression in an AKT inactivation manner in two NSCLC cell lines, human lung adenocarcinoma A549 and squamous cell carcinoma H1703 cells. Knockdown of TS using small interfering RNA (siRNA) or inhibiting AKT activity with PI3K inhibitor LY294002 enhanced the cytotoxicity and cell growth inhibition of salinomycin. A combination of cisplatin and salinomycin resulted in synergistic enhancement of cytotoxicity and cell growth inhibition in NSCLC cells, accompanied with reduced activation of phospho-AKT, and TS expression. Overexpression of a constitutive active AKT (AKT-CA) expression vector reversed the salinomycin and cisplatin-induced synergistic cytotoxicity. In contrast, pretreatment with LY294002 further decreased the cell viability in salinomycin and cisplatin cotreated cells. Our findings suggested that the down-regulation of AKT-mediated TS expression by salinomycin enhanced the cisplatin-induced cytotoxicity in NSCLC cells. These results may provide a rationale to combine salinomycin with cisplatin for lung cancer treatment. (C) 2016 Elsevier Inc. All rights reserved.
Performance estimation of energy consumption and carbon dioxide emissions for sustainable development in Baltic Sea countries
(2016-12-15)
Chang, Ming-Chung
;
Hu, Jin-Li
;
Jan, Fang-Guan
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經營管理研究所
;
Institute of Business and Management
This paper argues that many past studies have only been concerned with efficiency and not with the efficiency achievement ratio, whereas information on Baltic Sea countries\' energy or environmental efficiency has always been based on studies that focus on different research objectives, but do not include all the Baltic Sea countries. Hence, the main aim of this paper is to analyze the impact of the achievement ratios for energy consumption and carbon dioxide emissions on both energy consumption and carbon dioxide emissions by including all Baltic Sea countries as a case study and constructing new static and dynamic efficiency indices. The study\'s results show that the 2008 Global Financial Crisis,resulted in low achievement ratios for energy consumption and carbon dioxide emissions, and the conclusion is that since a lot of attention has been paid to staving off an economic downturn, the Global Financial Crisis may in fact have stalled actions to combat carbon dioxide emissions and energy over-consumption. In addition, the Baltic Sea countries should strengthen energy management on the demand side. (C) 2016 Elsevier Ltd. All rights reserved.
社會網絡分析方法探討 LED 公司專利侵權訴訟關係之角色與位置
(交通大學科技法律學院（原名稱：交通大學科技法律研究所）, 2016-12-15)
楊文蘭
;
Wen-Lan Yang
智慧財產權為科技產業公司重要財產，為保護智慧財產所應採取的法律策略時，應綜合評估各項資訊，而以商業目的考量，以佈局方式取得最佳利益。競爭對手為取得最佳利益，可能採取提起專利侵權訴訟等方式，製造生產障礙，取得談專利授權的談判地位等。另外，被多數公司選擇為訴訟的專利標的，亦能從中發現該專利所具有的價值。因為專利訴訟常為高科技公司採取的重要競爭策略，如何辨識企業為何發動專利訴訟的意圖是制訂訴訟策略的重要議題。本研究蒐集 LED 產業的專利權侵權訴訟資料並形成分析的資料集，本文以上歸納，透過 109 筆訴訟案件經過篩選後，將訴訟筆數縮減為64 筆以及 24 家公司進行整理分析，結合敘述性統計與社會網絡分析辨識專利權侵權訴訟行動者的訴訟意圖，專利訴訟網絡中的向外程度中心性與特徵向量中心性形成主動性質的意圖指標、向內程度中心性為被動性意圖指標，利用此二種主動性（攻擊方）與被動性（防禦方）指標可以將 24 家訴訟公司歸類成四種角色，包括主要玩家、專利蟑螂、受害者和旁觀者，以瞭解公司的訴訟意圖並探討訴訟專利的價值，發現主要玩家有訴訟優勢建議採取訴訟策略，專利蟑螂不易由反訴方式制衡，旁觀者則建議透過併購專利方式強化重要性。
資料經濟趨勢下美國對於資料仲介業規制之研究
(交通大學科技法律學院（原名稱：交通大學科技法律研究所）, 2016-12-15)
許慧瑩
;
葉志良
;
Huei-Ying Hsu
;
Chih-Liang Yeh
在資料驅動社會脈動的今日，資料透過大量線上與離線活動，不斷地生成、傳遞與利用，儼然與物質和能源並列為關鍵的經濟資源，資料經濟已成為眾人討論的熱點；然而，資料與其他經濟資源最大的差異點，在於資料並不會因為使用而消耗，而是透過不斷地重組與再利用，使得資料的價值越經使用價值越高。由於資料具備此等特性，使得在資料驅動式社會生態環境中掌握大量資料（訊）或資料（訊）來源者，相對地占有較為優勢的地位。資料仲介業（data broker）因掌握大量從政府公共檔案、經銷商以及消費者日常生活等所取得的原始資料，與透過資料通路所進行之資料蒐集、儲存、分析、分享等，其所提供的資料產品與服務帶動整個資訊經濟的發展。特別在大數據統計分析應用技術發展下，將資料廣泛應用至各個領域，使原先的資料仲介業產生蛻變。然而，當資料仲介業者為找尋資料與資料間的關連性所為之剖繪（profiling），也因為資料的連結，對於個人資料與隱私保護造成相當大的衝擊。大數據趨勢下資料的應用，如何在各方利害關係者間取得平衡，甚或考量對資料仲介業進行規制，具有深入研究的價值。本文透過檢視近期美國資料仲介業的個資外洩事件、聯邦貿易委員會提出之隱私綱領、美國政府責任辦公室對資料仲介業規制之檢視報告、美國國會近期提出之立法草案，以及業者自發性的自律機制，逐步探求美國對於資料仲介業的規制模式，進一步反思我國法制上如何因應資料服務業的發展，以及如何於大數據應用中對於個人資料與隱私保護議題所產生之困境，提出初步的導引方向。
Gravity monitoring of Tatun Volcanic Group activities and inference for underground fluid circulations
(2016-12-15)
Mouyen, Maxime
;
Chao, Benjamin Fong
;
Hwang, Cheinway
;
Hsieh, Wen-Chi
;
土木工程學系
The Tatun Volcano Group (TVG), located on the northern coast of Taiwan adjacent to the city of Taipei, experiences active hydrothermalism but has no historical record of volcanic eruption. Yet recent studies suggest that TVG is dormant-active rather than extinct. To monitor mass transfers and to gain further understanding of this volcanic area, gravity variations have been recorded continuously since 2012 using a superconducting gravimeter, and once every few months since 2005 using absolute gravimeters. We analyze the continuous gravity time series and propose a model that best explains the gravity variations due to local groundwater redistribution. By correcting these variations, we identify gravity changes as large as 35 Gal that occurred concomitantly to fluid pressure-induced earthquakes and changes in the gas composition at Dayoukeng, one of TVG\'s fumaroles, over 2005-2007. We examine several fluid movements that can match the gravity observations, yet too few additional constraints exist to favor any of them. In particular, no significant ground displacements are observed when these gravity variations occurred. On the other hand, the model of gravity changes due to local groundwater redistribution can be routinely computed and removed from the ongoing time gravity measurements in order to quickly identify any unusual mass transfer occurring beneath TVG. (C) 2016 Elsevier B.V. All rights reserved.
美國專利侵權合理權利金之計算方式及發展趨勢
(交通大學科技法律學院（原名稱：交通大學科技法律研究所）, 2016-12-15)
吳靜怡
;
Ching-Yi Wu
本文首先說明美國專利侵權損害賠償之法律規定，再以質性分析判決內容之方式，淺介數個「所失利益」、「合理權利金」、「可比較的授權」、「分配法則、整體市場價值法則」之案件，藉此說明美國法院計算合理權利金之方式。由於判決乃針對個案事實適用法律之結果，對於計算合理權利金之觀點與角度並非全面，部分判決間就相同法律原則甚至產生不同解釋結果，原因為何？首應探究者乃各個法律原則之初衷，再審究個案事實之異同，始能妥適適用各該法律原則。本文嘗試分類歸納不同案件類型，以建構合理權利金計算之框架概念，並提出「合理權利金」之計算模式。再就分配法則、整體市場價值法則、最小可銷售元件、貢獻度等概念在「所失利益」、「合理權利金」、「侵害人所得利益」等不同損害賠償計算方法下之定位提出建議。對於合理權利金最近發展趨勢，即「標準基礎專利之權利金」及「持續性權利金」之計算方式，本文亦予以分析介紹。計算標準基礎專利之權利金時，與一般合理權利金之計算並不完全相同，尤其專利權人是否履行「公平合理無歧視之授權義務」，是否造成「專利箝制、權利金堆疊」而有礙競爭、損及消費者利益，近年來已成為美國學界與實務界關注之焦點，美國聯邦地方法院對此種權利金之計算呈現多樣化之狀態，聯邦巡迴上訴法院最近在 Ericsson v. D-Link 案中給予審判之指導方針，本文比較該案與其他標準基礎專利權利金計算之異同，並介紹我國智財法院相關判決及提出建議。此外，於陪審團判決確認侵害專利後，侵權人仍繼續侵權所衍生之「持續性權利金」議題，聯邦巡迴上訴法院雖曾表達過幾個原則，然未明示計算方法，本文分析德州東區地方法院法官對 Mondis Technology Ltd. v. Chimei InnoLux Corp. 一案之意見及學者間不同之觀點，藉以建立「持續性權利金之計算架構」，並提出針砭之建言。
評估一受測者對網路活動之依賴程度的方法
(2016-12-16)
蕭子健
;
紀虹名
;
謝岱凌
一種評估一受測者對網路活動之依賴程度的方法，包含以下步驟：(A)一多媒體播放單元於一第一時間期間播放一情緒刺激材料以供該受測者觀看；(B)一呼吸感測單元感測該受測者於該第一時間期間及一先前於該第一時間期間的第二時間期間之呼吸動作以分別產生兩組的胸部與腹部呼吸訊號；(C)一處理單元將每一呼吸訊號分解成具有不同頻率的一第一訊號成份及一第二訊號成份；(D)該處理單元計算出每一訊號成份的一平均振幅與一平均頻率；及(E)該處理單元根據該等平均振幅該等平均頻率及該情緒刺激材料，產生一評估結果。
半導體元件的製備方法
(2016-12-16)
張俊彥
;
李?宇
;
郭浩中
一種半導體元件的製備方法，包含以下步驟：(a)準備一由III族元素材料構成的半導體基板；(b)對該半導體基板加熱並於其上形成一緩衝單元，該緩衝單元包括一層以物理氣相沉積法沉積於該半導體基板的氮化鋁緩衝薄膜；(c)以化學氣相沉積法於該緩衝單元上沉積一半導體單元，該半導體單元包括一具有六角結晶結構的氮化鎵磊晶層。
An enhanced logarithmic method for signomial programming with discrete variables
(2016-12-16)
Li, Han-Lin
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Fang, Shu-Cherng
;
Huang, Yao-Huei
;
Nie, Tiantian
;
資訊管理與財務金融系註：原資管所+財金所
Signomial programming problems with discrete variables (SPD) appear widely in real-life applications, but they are hard to solve. This paper proposes an enhanced logarithmic method to reformulate the SPD problem as a mixed 0-1 linear program (MILP) with a minimum number of binary variables and inequality constraints. Both of the theoretical analysis and numerical results strongly support its superior performance to other state-of-the-art linearization methods. We also extend the proposed method to linearize some more complicated problems involving product and fractional terms in discrete and continuous variables. (C) 2016 Elsevier B.V. All rights reserved.
視覺生理用頭戴式系統
(2016-12-16)
歐陽盟
;
邱俊誠
;
黃庭緯
;
柯美蘭
;
蔡宜君
一種視覺生理用頭戴式系統，包含一頭戴式固定裝置、一眼部影像擷取設備、一電生理信號擷取裝置及一運算裝置。頭戴式固定裝置安裝於一受測者頭部。眼部影像擷取設備安裝於頭戴式固定裝置以產生該受測者的一眼部影像資料。電生理信號擷取裝置於擷取該眼部影像資料同時產生一電生理回饋資料。運算裝置運算分析該眼部影像資料及該電生理回饋資料以建立該眼部影像資料及該電生理回饋資料之間的關聯性。
Hydrogen gas sensors from polysilicon nanobelt devices selectively modified with sensing materials
(2016-12-16)
Nhan Ai Tran
;
Pan, Fu-Ming
;
Sheu, Jeng-Tzong
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材料科學與工程學系
;
分子醫學與生物工程研究所
Double-junction n(+)/n(-)/n(+) polysilicon nanobelts featuring selectively deposited sensing materials have been investigated for application as H-2 gas sensors. The selective modification of the devices was performed through a combination of localized ablation of a resist and lift-off of a previous catalyst material deposited through e-beam evaporation. Four nanobelt devices, differentiated by their doping concentrations at the n(-) region (from 2.5. x. 10(13) to 2.5. x. 10(14) cm(-2)), were analyzed in terms of the responses to H-2 and their self-heating effects. A low doping concentration improved the response at room temperature, owing to a longer Debye length. The variation in the H-2-induced surface potential associated with temperature, accounting for degradation in the response of the nanobelts with Joule heating bias, was analyzed in terms of the I-V characteristics of the double-junction device. Among various catalysts (Pt, Pd, Pt/Pd) evaluated for their H-2 sensing characteristics, an ultrathin film of Pt/Pd was most favorable.