Browsing by Issue Date, starting with "2016-02-11"

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Gate-Stack Engineering for Self-Organized Ge-dot/SiO2/SiGe-Shell MOS Capacitors
(2016-02-11)
Lai, Wei-Ting
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Yang, Kuo-Ching
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Liao, Po-Hsiang
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George, Tom
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Li, Pei-Wen
We report the first-of-its-kind, self-organized gate-stack heterostructure of Ge-dot/SiO2/SiGe-shell on Si fabricated in a single step through the selective oxidation of a SiGe-nanopatterned pillar over a Si3N4 buffer layer on a Si substrate. Process-controlled tunability of the Ge-dot size (7.5-90 nm), the SiO2 thickness (3-4 nm), and the SiGe-shell thickness (2-15 nm) have been demonstrated, enabling a practically achievable core building block for Ge-based metal-oxide-semiconductor (MOS) devices. Detailed morphologies, structural, and electrical interfacial properties of the SiO2/Ge-dot and SiO2/SiGe interfaces were assessed using transmission electron microscopy, energy dispersive X-ray spectroscopy, and temperature-dependent high/low-frequency capacitance-voltage measurements. Notably, NiGe/SiO2/SiGe and Al/SiO2/Ge-dot/SiO2/SiGe MOS capacitors exhibit low interface trap densities of as low as 3-5 x 10(11) cm(-2) eV(-1) and fixed charge densities of 1-5 x 10(11) cm(-2), suggesting good-quality SiO2/SiGe-shell and SiO2/Ge-dot interfaces. In addition, the advantage of having single-crystalline Si1-xGex shell (x > 0.5) in a compressive stress state in our self-aligned gate-stack heterostructure has great promise for possible SiGe (or Ge) MOS nanoelectronic and nanophotonic applications.
Evaluation and Verification of Channel Transmission Characteristics of Human Body for Optimizing Data Transmission Rate in Electrostatic-Coupling Intra Body Communication System: A Comparative Analysis
(2016-02-11)
Tseng, Yuhwai
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Su, Chauchin
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Ho, Yingchieh
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電控工程研究所
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Institute of Electrical and Control Engineering
Background Intra-body communication is a new wireless scheme for transmitting signals through the human body. Understanding the transmission characteristics of the human body is therefore becoming increasingly important. Electrostatic-coupling intra-body communication system in a ground-free situation that integrate electronic products that are discretely located on individuals, such as mobile phones, PDAs, wearable computers, and biomedical sensors, are of particular interest. Materials and Methods The human body is modeled as a simplified Resistor-Capacitor network. A virtual ground between the transmitter and receiver in the system is represented by a resister-capacitor network. Value of its resistance and capacitance are determined from a system perspective. The system is characterized by using a mathematical unit step function in digital baseband transmission scheme with and without Manchester code. As a result, the signal-to-noise and to-intersymbol-interference ratios are improved by manipulating the load resistor. The data transmission rate of the system is optimized. A battery-powered transmitter and receiver are developed to validate the proposal. Results A ground-free system fade signal energy especially for a low-frequency signal limited system transmission rate. The system transmission rate is maximized by simply manipulating the load resistor. Experimental results demonstrate that for a load resistance of 10k-50k Omega, the high-pass 3 dB frequency of the band-pass channel is 400kHz-2MHz in the worst-case scenario. The system allows a Manchester-coded baseband signal to be transmitted at speeds of up to 20M bit per second with signal-to-noise and signal-to-intersymbol-interference ratio of more than 10 dB. Conclusion The human body can function as a high speed transmission medium with a data transmission rate of 20Mbps in an electrostatic-coupling intra-body communication system. Therefore, a wideband signal can be transmitted directly through the human body with a good signal-to-noise quality of 10 dB if the high-pass 3 dB frequency is suitably selected.
Recent developments in antibiotic agents for the treatment of complicated intra-abdominal infections
(2016-02-11)
Lin, Shang-Yi
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Huang, Chung-Hao
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Ko, Wen-Chien
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Chen, Yen-Hsu
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Hsueh, Po-Ren
Introduction: Treatment of complicated intra-abdominal infections (cIAIs) is becoming increasingly difficult because of the widespread emergence of multidrug-resistant organisms.Areas covered: In this review, we discuss the effectiveness of several new antibiotics for the treatment of cIAIs, including new -lactamase inhibitor combinations (BLICs) and tetracycline-class drugs, recently developed aminoglycosides and quinolones, and novel lipoglycopeptides and oxazolidinones.Expert opinion: Of the new BLICs, ceftolozane/tazobactam is associated with adequate clinical cure rates in patients with cIAIs. Currently, two new -lactamase inhibitors, namely avibactam and MK-7655, are under development for clinical use in the treatment of cIAIs. Eravacycline, a novel, fully synthetic tetracycline-class drug, has been shown in Phase II and III clinical trials to be more potent than tigecycline against a significant number of multidrug-resistant organisms causing cIAIs. Plazomicin, a next-generation aminoglycoside, is a promising agent for treatment of cIAIs due to multidrug-resistant pathogens. Of the recently developed quinolones, delafloxacin and finafloxacin have been shown to be effective against pathogens that survive and multiply in mildly acidic environments, although further clinical studies examining their clinical utility in the treatment of cIAIs are warranted. Oritavancin, a new semisynthetic lipoglycopeptide agent, has been demonstrated to be a potent antibiotic in the treatment of cIAIs due to drug-resistant Gram-positive organisms. Several other new antibiotics in development also show promise and will hopefully broaden the possibilities for treatment of complicated intra-abdominal infections due to MDR pathogens.
Measurement of the Reactor Antineutrino Flux and Spectrum at Daya Bay
(2016-02-12)
An, F. P.
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Balantekin, A. B.
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Band, H. R.
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Bishai, M.
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Blyth, S.
This Letter reports a measurement of the flux and energy spectrum of electron antineutrinos from six 2.9 GW(th) nuclear reactors with six detectors deployed in two near (effective baselines 512 and 561 m) and one far (1579 m) underground experimental halls in the Daya Bay experiment. Using 217 days of data, 296 721 and 41 589 inverse beta decay (IBD) candidates were detected in the near and far halls, respectively. The measured IBD yield is (1.55 +/- 0.04) x 10(-18) cm(2) GW(-1) day(-1) or (5.92 +/- 0.14) x 10(-43) cm(2) fission(-1). This flux measurement is consistent with previous short-baseline reactor antineutrino experiments and is 0.946 +/- 0.022 (0.991 +/- 0.023) relative to the flux predicted with the Huber-Mueller (ILL-Vogel) fissile antineutrino model. The measured IBD positron energy spectrum deviates from both spectral predictions by more than 2 sigma over the full energy range with a local significance of up to similar to 4 sigma between 4-6 MeV. A reactor antineutrino spectrum of IBD reactions is extracted from the measured positron energy spectrum for model-independent predictions.
Host-only solid-state near-infrared light-emitting electrochemical cells based on interferometric spectral tailoring
(2016-02-14)
Hsu, Jia-Hong
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Su, Hai-Ching
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照明與能源光電研究所
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Institute of Lighting and Energy Photonics
Solid-state near-infrared (NIR) light-emitting electrochemical cells (LECs) possess great potential in applications of NIR light sources due to their simple device structure, compatibility with large area and flexible substrates and low operating voltage. However, common host-guest NIR LECs suffer from the problem of significantly enhanced residual host emission upon increasing the bias voltage to achieve a higher NIR light output. A higher NIR light output can only be obtained at the expense of spectral purity in host-guest NIR LECs. To enhance the NIR light output of LECs without sacrificing the spectral purity significantly, a novel approach to generate NIR EL from host-only red-emitting LECs by adjusting the device thickness to modify the microcavity effect is proposed. NIR EL from host-only red-emitting LECs can be realized by adjusting the device thickness to shift the peak wavelength for constructive interference at the NIR spectral region. NIR EL resulting from the microcavity effect is relatively insensitive to bias voltage. Therefore, without losing spectral purity significantly, a 20x enhancement in the NIR output has been obtained in comparison to the previously reported value from host-guest NIR LECs. These results reveal that tailoring the EL spectra of host-only red-emitting LECs via modifying the microcavity effect would be a promising way to generate a higher NIR light output without suffering from the residual host emission problem of host-guest NIR LECs.
Thermoelectric property and x-ray absorption near edge structure studies on Si-doped CaMnO3-delta
(2016-02-15)
Liu, Chia-Jyi
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Bhaskar, Ankam
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Yuan, J. J.
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Yang, Zong-Ren
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Chen, Shih-Show
We report electrical resistivity, thermopower and Ca K-, Mn L-2,L-3- and O K-edges x-ray absorption near edge structure (XANES) studies on CaMn1-xSixO3-delta with x=0, 0.02, and 0.05. The transport properties measurements indicate that the sample of x=0.02 has the lowest electrical resistivity compared to the samples of x=0 and 0.05. Meanwhile, the temperature dependence of thermopower behaves significantly different for samples of x=0.02 and 0.05. These unusual phenomena are elucidated based on the charge transfer equilibrium principle together with the XANES results, which show that the Si substitution for Mn appears to generate an electron doping effect and lattice distortion. Among the samples, CaMn0.98Si0.02O3-delta exhibits the highest figure of merit of 0.0128 at 300 K. This value represents an improvement of about 52% compared to pristine CaMnO3-delta. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
Photo-induced 1,3-cyclohexadiene ring opening reaction: Ab initio on-the-fly nonadiabatic molecular dynamics simulation
(2016-02-15)
Lei, Yibo
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Wu, Huiyu
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Zheng, Xiaolei
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Zhai, Gaohong
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Zhu, Chaoyuan
By a newly developed algorithm to compute global nonadiabatic switching probability only using electronic adiabatic potential energy surfaces and its gradients, we could able to perform on-the-fly trajectory surface hopping molecular dynamics at the SA-CASSCF(14, 8)/6-31G* quantum level to investigate the photo-induced 1,3-cyclohexadiene ring opening reaction from 1,3-cyclohexadiene (CHD) to 1,3,5-hexatriene (HT). We found four conical intersection zones within three singlet low-lying electronic states, in which 1B/2A and 1A/2A are well known to be the most important conical intersection zones to govern dynamics of ring opening reaction. The present simulation gained insight into nonadiabatic dynamics in which 516 sampling trajectories out of 600 can switch back and forth between two involved potential energy surfaces not only at 1B/2A, but also at 1A/2A. This insight is the key to influence quantum yields and time scales of the ring opening reaction. We estimated time constants as 46 fs, 82 fs, and 120 fs, respectively for crossing 1B/2A and 1A/2A, and excited-state lifetime in comparison with corresponding experimental values 56 fs, 80 fs and 130 fs. We estimated quantum yield 0.47/0.53 to HT/CHD in comparison to experiment values 0.30/0.70 in the gas-phase and 0.41/0.59 in the condense-phase. Moreover, the present simulation within 600 sampling trajectories indicates that there is no five membered ring forming in agreement with experiment results and with prediction from the previous wave-packet simulation as a rare case. (C) 2015 Elsevier B.V. All rights reserved.
具有優選排列方向之奈米雙晶金膜、其製備方法、及包含其之接合結構
(2016-02-16)
陳智
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邱韋嵐
;
周苡嘉
本發明係有關於一種具有優選排列方向之奈米雙晶金膜、其製備方法、及包含其之接合結構。該金膜具有一厚度方向，且於該厚度方向沿著[220]晶軸方向堆疊；其中，該金膜係至少50%以上之體積係由複數個奈米雙晶金所構成，該些奈米雙晶金係彼此相鄰且沿著垂直該厚度之方向排列，並沿著[111]晶軸方向堆疊而成。
天線裝置及天線系統
(2016-02-16)
金正元
一種天線裝置，包含一第一槽孔天線及第二槽孔天線。該第一槽孔天線通過一第一平面並接收一第一射頻訊號。該第二槽孔天線連接該第一槽孔天線，並通過一第二平面且接收一第二射頻訊號。該第二平面垂直於該第一平面。該第二射頻訊號的相位與該第一射頻訊號的相位相差九十度。藉此，天線裝置具有全向性水平極化的特性，且具有較小的水平截面積。
Ventricular Myocytes Electrically Couple with Nonmyocytes in the Infarcted Mouse Heart
(2016-02-16)
Rubart, Michael
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Tao, Wen
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Lu, Xiao-long
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Lin, Shien-Fong
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Soonpaa, Mark
Unique Localization of Phospholamban in Perinuclear Membranes of Cardiomyocytes from Several Species
(2016-02-16)
Chiou, Yu-An
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Sung, Yen-Ling
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Chen, Peng-Sheng
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Lin, Shien-Fong
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Chen, Zhenhui
生化反應之即時量測方法
(2016-02-16)
陳怡君
本發明係揭露一種生化反應之即時量測方法，其係在互相吸引的生物分子間利用福斯特共振能量轉移對(FRET pair)的施體螢光分子與受體螢光分子來分別進行標定，當生物分子間互相產生反應時，此標定的施體螢光分子與受體螢光分子會產生福斯特共振能量轉移(FRET)訊號。這些量測到的FRET訊號以及非FRET訊號之螢光強度係用來計算已結合FRET對、未結合施體螢光分子及未結合受體螢光分子等的濃度，然後自這些濃度的計算結果獲得化學反應速率。本發明可以應用於任何量測螢光的設備上，且不受限於樣本態樣，並可達到快速、即時且連續性的量測。
水畫模擬方法及電腦程式產品
(2016-02-16)
陳佩姍
;
黃　世強
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林文杰
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蔡文祥
一種水畫模擬方法，由一處理器執行，包含以下步驟：(A)計算第i粒子及第j粒子的距離D(i,j)。(B)判斷該第i粒子的區域碼及第j粒子的區域碼是否相同，若是，進入步驟(C)，若否，進入步驟(G)。(C)判斷該距離D(i,j)是否小於一第一作用距離，若是，(D)將該距離D(i,j)代入一第一位移計算公式，並根據計算結果更新該第i粒子的位置及第j粒子的位置。(E)判斷更新後的距離D(i,j)是否小於一第二作用距離，若是，(F)使該第i粒子的區域碼及第j粒子的區域碼相等。(G)將步驟(A)中該距離D(i,j)代入一第二位移計算公式，並根據計算結果更新該第i粒子的位置及第j粒子的位置。
獲得檢測裝置插拔組合及電力線拓樸的方法及其電子裝置
(2016-02-16)
張文信
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陳勇旗
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曹孝櫟
一種獲得檢測裝置插拔組合及電力線拓樸的方法及其電子裝置。所述方法包括下列步驟：取得至少一檢測裝置的第一數量以及至少一插座的第二數量；產生至少一檢測裝置以及至少一插座之間的多個插拔組合；依據第二數量計算總插座關係值；依據第一數量設定特定插拔組合的特定插拔次數以及特定插座關係值；以及依據特定插座關係值、總插座關係值以及各參考插拔組合與特定插拔組合之間的距離從多個參考插拔組合找出候選插拔組合。
多維資料空間的貝氏循序切割系統及其計數引擎
(2016-02-16)
李鎮宜
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張錫嘉
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許書餘
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陳志龍
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蔡長宏
本發明係為一計數引擎，應用於D維度資料空間的一貝氏循序切割系統中。計數引擎包括：一過濾模組，比較至少一受測資料點及與一子分區所對應的D個邊界資訊產生D個旗標組；以及一計數模組，連接至該過濾模組，根據D個旗標組判斷該至少一受測資料點是否位於該子分區而產生一結果信號，並根據該結果信號而選擇性遞增與該子分區對應之一累計值。
USING DATA ENVELOPMENT ANALYSIS TO SUPPORT BEST-VALUE CONTRACTOR SELECTION
(2016-02-17)
Yang, Jyh-Bin
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Wang, Han-Hsiang
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Wang, Wei-Chih
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Ma, Shin-Min
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土木工程學系
Selecting an appropriate contractor or supplier is essential to the successful implementation of a public procurement project. The Taiwan government frequently applies the best-value (BV) tendering method, a multi-criteria evaluation method, to procure projects. However, the selection process of the winner for a BV-based procurement project is generally subjective and thus is easily accused of corruptions. To develop a systematic method to support contractor selection, this study proposes using the Data Envelopment Analysis (DEA) to facilitate the criteria evaluations for each bidder during the short-listing stage. The evaluation results of using the DEA are a list of potential BV winners who are then suggested to enter into the final selection stage. Based on three case studies related to service procurement projects, this research finds that the DEA is suitable of assessing the relative efficiencies among bidders when the BV approach is applied. Lessons learned here should be helpful in applying the DEA to aid bid evaluations in other supplier selection problems.
Development of Bifunctional Gadolinium-Labeled Superparamagnetic Nanoparticles (Gd-MnMEIO) for In Vivo MR Imaging of the Liver in an Animal Model
(2016-02-17)
Kuo, Yu-Ting
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Chen, Chiao-Yun
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Liu, Gin-Chung
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Wang, Yun-Ming
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生物科技學系
Liver tumors are common and imaging methods, particularly magnetic resonance imaging (MRI), play an important role in their non-invasive diagnosis. Previous studies have shown that detection of liver tumors can be improved by injection of two different MR contrast agents. Here, we developed a new contrast agent, Gd-manganese-doped magnetism-engineered iron oxide (Gd-MnMEIO), with enhancement effects on both T1-and T2-weighted MR images of the liver. A 3.0T clinical MR scanner equipped with transmit/receiver coil for mouse was used to obtain both T1-weighted spoiled gradient-echo and T2-weighted fast spin-echo axial images of the liver before and after intravenous contrast agent injection into Balb/c mice with and without tumors. After pre-contrast scanning, six mice per group were intravenously injected with 0.1 mmol/kg Gd-MnMEIO, or the control agents, i.e., Gd-DTPA or SPIO. The scanning time points for T1-weighted images were 0.5, 5, 10, 15, 20, 25, and 30 min after contrast administration. The post-enhanced T2-weighted images were then acquired immediately after T1-weighted acquisition. We found that T1-weighted images were positively enhanced by both Gd-DTPA and Gd-MnMEIO and negatively enhanced by SPIO. The enhancement by both Gd-DTPA and Gd-MnMEIO peaked at 0.5 min and gradually declined thereafter. Gd-MnMEIO (like Gd-DTPA) enhanced T1-weighted images and (like SPIO) T2-weighted images. Marked vascular enhancement was clearly visible on dynamic T1-weighted images with Gd-MnMEIO. In addition, the T2 signal was significantly decreased at 30 min after administration of Gd-MnMEIO. Whereas the effects of Gd-MnMEIO and SPIO on T2-weighted images were similar (p = 0.5824), those of Gd-MnMEIO and Gd-DTPA differed, with Gd-MnMEIO having a significant T2 contrast effect (p = 0.0086). Our study confirms the feasibility of synthesizing an MR contrast agent with both T1 and T2 shortening effects and using such an agent in vivo. This agent enables tumor detection and characterization in single liver MRI sections.
Mind-Wandering Tends to Occur under Low Perceptual Demands during Driving
(2016-02-17)
Lin, Chin-Teng
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Chuang, Chun-Hsiang
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Kerick, Scott
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Mullen, Tim
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Jung, Tzyy-Ping
Fluctuations in attention behind the wheel poses a significant risk for driver safety. During transient periods of inattention, drivers may shift their attention towards internally-directed thoughts or feelings at the expense of staying focused on the road. This study examined whether increasing task difficulty by manipulating involved sensory modalities as the driver detected the lane-departure in a simulated driving task would promote a shift of brain activity between different modes of processing, reflected by brain network dynamics on electroencephalographic sources. Results showed that depriving the driver of salient sensory information imposes a relatively more perceptually-demanding task, leading to a stronger activation in the task-positive network. When the vehicle motion feedback is available, the drivers may rely on vehicle motion to perceive the perturbations, which frees attentional capacity and tends to activate the default mode network. Such brain network dynamics could have major implications for understanding fluctuations in driver attention and designing advance driver assistance systems.
Stochastic growth dynamics and composite defects in quenched immiscible binary condensates
(2016-02-18)
Liu, I. -K.
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Pattinson, R. W.
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Billam, T. P.
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Gardiner, S. A.
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Cornish, S. L.
We study the sensitivity of coupled condensate formation dynamics on the history of initial stochastic domain formation in the context of instantaneously quenched elongated harmonically trapped immiscible two-component atomic Bose gases. The spontaneous generation of defects in the fastest condensing component, and subsequent coarse-graining dynamics, can lead to a deep oscillating microtrap into which the other component condenses, thereby establishing a long-lived composite defect in the form of a dark-bright solitary wave. We numerically map out diverse key aspects of these competing growth dynamics, focusing on the role of shot-to-shot fluctuations and global parameter changes (initial state choices, quench parameters, and condensate growth rates), with our findings also qualitatively confirmed by realistic finite-duration quenches. We conclude that phase-separated structures observable on experimental time scales are likely to be metastable states whose form is influenced by the stability and dynamics of the spontaneously emerging dark-bright solitary wave.
交大e-News第203期-交大前瞻火箭研究中心 APPL-9C雙節小火箭順利升空回收
(2016-02-19)
國立交通大學秘書室
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Secretariat