Browsing by Issue Date, starting with "2017-08-31"

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NERVE IMPULSE SIGNAL STIMULATION DEVICE AND METHOD FOR FABRICATING THE SAME
(2017-08-31)
Yu-Ting Cheng
;
Chung-Yu Wu
;
Jui-Sheng Sun
;
Yu-Min Fu
;
Che-Yu Chen
A nerve impulse signal stimulation device and a method for fabricating the same are provided. The nerve impulse signal stimulation device includes: a substrate having a first surface and a second surface opposite to the first surface; a first metal layer formed on the first surface of the substrate; a second metal layer formed on the first metal layer; a plurality of openings exposing a portion of the first surface of the substrate, a portion of the first metal layer and a portion of the second metal layer; and a ferromagnetic material attached to the second surface of the substrate. The openings cause the nerve impulse signal stimulation device to obtain a parallel circuit structure, thereby increasing the current load and the magnetic field intensity, reducing the size of the device, and ensuring the safety of operations.
METHOD FOR PROCESSING IMAGE WITH DEPTH INFORMATION AND COMPUTER PROGRAM PRODUCT THEREOF
(2017-08-31)
Jiun-In GUO
;
Po-Yu CHIEN
The present invention proposes a method for processing an image with depth information and a computer program product thereof, wherein a filtering template is used to extract a gesture region and filter the image, and wherein the hue values of the pixels of the current gesture region are used to modify the self-adaptive thresholds of the filtering template, and wherein the size of the filtering template at the next time point is modified according to the depth at the current time point and the depth at the former time point.
Negative correlation of cortical thickness with the severity and duration of abdominal pain in Asian women with irritable bowel syndrome
(2017-08-31)
Chua, Chian Sem
;
Bai, Chyi-Huey
;
Shiao, Chen-Yu
;
Hsu, Chien-Yeh
;
Cheng, Chiao-Wen
Background & aims: Irritable bowel syndrome (IBS) manifests as chronic abdominal pain. One pathophysiological theory states that the brain-gut axis is responsible for pain control in the intestine. Although several studies have discussed the structural changes in the brain of IBS patients, most of these studies have been conducted in Western populations. Different cultures and sexes experience different pain sensations and have different pain responses. Accordingly, we aimed to identify the specific changes in the cortical thickness of Asian women with IBS and to compare these data to those of non-Asian women with IBS. Methods: Thirty Asian female IBS patients (IBS group) and 39 healthy individuals (control group) were included in this study. Brain structural magnetic resonance imaging was performed. We used FreeSurfer to analyze the differences in the cortical thickness and their correlations with patient characteristics. Results: The left cuneus, left rostral middle frontal cortex, left supramarginal cortex, right caudal anterior cingulate cortex, and bilateral insula exhibited cortical thinning in the IBS group compared with those in the controls. Furthermore, the brain cortical thickness correlated negatively the severity as well as duration of abdominal pain. Conclusions: Some of our findings differ from those of Western studies. In our study, all of the significant brain regions in the IBS group exhibited cortical thinning compared with those in the controls. The differences in cortical thickness between the IBS patients and controls may provide useful information to facilitate regulating abdominal pain in IBS patients. These findings offer insights into the association of different cultures and sexes with differences in cortical thinning in patients with IBS.
Phosphonic Acid and Lithium Salt as Effective p-Dopants to Oxidize Spiro-OMeTAD for Mesoscopic Sb2S3 Solar Cells
(2017-08-31)
Chung, Chih-Chun
;
Tsai, Ting -Wei
;
Wu, Hui -Ping
;
Diau, Eric Wei-Guang
;
應用化學系
1-Decyl phosphonic acid (DPA) proved an effective p-doping additive to oxidize spiro-OMeTAD as a hole-transporting material (HTM) for nanostructured Sb2S3 extremely thin absorber (ETA) solar cells. DPA had the effect of enhancing the hole conductivities of spiro-OMeTAD in the presence of lithium bis(trifluoromethyl- sulfonyl)-imide (LiTFSI) to significantly improve the device performance. Transient photoelectric measurements and electrochemical impedance spectra of devices fabricated with varied additive conditions provided information about the charge- transport and recombination kinetics and hole conductivities for Sb2S3 devices with additives DPA and LiTFSI that exhibited superior performance. Thirty-five identical devices were fabricated to show the excellent reproducibility and long-term stability in air; the best Sb2S3 ETA device attained efficiency of power conversion 6.0%, which is twice that of a device using other typical additives (LiTFSI and 4-tert-butyl-pyridine) for spiro-OMeTAD serving as HTM.
Optical properties of plasma-enhanced chemical vapor deposited SiCxNy films by using silazane precursors
(2017-08-31)
Chang, Wei-Yuan
;
Chang, Chieh-Yu
;
Leu, Jihperng
;
材料科學與工程學系
;
Department of Materials Science and Engineering
In this study, amorphous silicon carbonitride (SiCxNy) films were fabricated by radio frequency (RF) chemical vapor deposition (PECVD) using a single silazane precursor and a low power density (0.15W/cm(3)) for better compositional control. The effects of the precursor chemical structure (C/Si ratio, C-Si-N structure, and vinyl groups) and deposition temperature (T-s) on the chemical structure and optical properties of SiCxNy films were examined using Fourier-transform infrared spectroscopy and X-ray photoelectron spectroscopy. Specifically, two new single precursors; namely, n-methyl-aza-2,2,4-trimethylsilacyclopentane (MTSCP) and 1,3-divinyl-1,1,3,3-tetramethyl-disilazane (DVTMDS) were studied and compared. SiCxNy films deposited using MTSCP involving Si-C-3-N rings formed Si-N and Si-(CH2)(3)-crosslinked structures at T-s <= 100 degrees C, and were then changed to predominantly Si-CH2-N-Si crosslinked structures at Ts > 300 degrees C, leading to a wide range of optical band gap from 5.2 to 3.7 eV. Compared to DVTMDS-deposited SiCxNy films, their relatively higher percentage of Si-C-N structure accounted for the lower optical band gap and reduced transmission. DVTMDS with di-vinyl groups readily formed a Si-(CH2)(2)-bridge in SiCxNy films Ts <= 200 degrees C, resulting in excellent optical transmittance. The transmittance in the visible wavelengths of 400 degrees C-deposited SiCxNy film using DVTMDS still showed 85%. Also, tunable refractive index between 1.44 and 2.10 were obtained for SiCxNy films deposited at T-s <= 400 degrees C. (c) 2017 Elsevier B.V. All rights reserved.
【活動花絮】新資訊時代的女力關鍵
(國立交通大學資訊學院, 2017-09)
林珮雯
106 年 4 月 8 日是交通大學創校 121 週年暨在台建校 59 週年校慶，同日系上辦系友座談會及系友聚會等活動。今年以「新資訊時代的女力關鍵」為題，很榮幸邀請趙書華學姐（創為精密材料股份有限公司創辦人）、逄愛君學姐（台大資工系教授）、黃美月學姐（阿奇八八董事長）、翁子婷等學姐（Tripresso 資料工程師/PyLadies Hosts）與會座談。
Integrating Poly-Silicon and InGaZnO Thin-Film Transistors for CMOS Inverters
(2017-09-01)
Chen, ChangDong
;
Yang, Bo-Ru
;
Liu, Chuan
;
Zhou, Xing-Yu
;
Hsu, Yuan-Jun
The applications of a-InGaZnO thin-film transistors (TFTs) to logic circuits have been limited owing to the intrinsic n-channel operation. In this paper, we demonstrated a hybrid inverter constructed by p-channel low-temperature poly-silicon (LTPS) TFTs and n-channel amorphous-indium-gallium-zinc-oxide (a-IGZO) TFTs. Hydrogenated LTPS TFTs and a-IGZO TFTs have been successfully fabricated on the same panel, followed by a rapid thermal annealing treatment to remove the hydrogens in the a-IGZO TFTs. The resulted hybrid inverter exhibits large noise margin closed to V-DD/2 and a high voltage gain as 68.3. Due to the complementary configurations in the static state, the inverter shows small current and thus consumes low power in hundreds of picowatts. As all the fabrication processes are compatible with conventional techniques, the reported results may open new opportunities in circuit design and applications for oxide TFTs.
System-Level ESD Protection for Automotive Electronics by Co-Design of TVS and CAN Transceiver Chips
(2017-09-01)
Chuang, Che-Hao
;
Ker, Ming-Dou
;
電子工程學系及電子研究所
;
Department of Electronics Engineering and Institute of Electronics
This paper proposed a co-packaged methodology using transient voltage suppressor (TVS) chips and a controller area network (CAN) bus transceiver to ensure IEC 61000-4-2 system-level ESD protection. The design methodology is verified in a high-voltage silicon-on-insulator process for CAN transceiver chip and an 0.8-mu m bipolar process for TVS chips. The I-V curves of the TVS and CAN transceiver chip are evaluated by the transmission line pulsing system with the pulse width of 100 ns. The breakdown voltage of the bi-directional TVS chips and CAN transceiver chip are higher than +/- 80 V compared with the +/- 70 V fault voltage tolerance requirement. The clamping voltage of the TVS device is lower than +/- 130 V to discharge ESD current before the CAN transceiver chip breakdown for effective ESD protection. The design target of parasitic inductance by bonding wires is calculated to meet the clamping voltage requirement. The CAN bus transceiver IC with TVS chips co-packaged has been evaluated to pass the IEC61000-4-2 contact +/- 15-kV stress without any hardware damages and latch-up issues.
【院系消息】
(國立交通大學資訊學院, 2017-09)
林珮雯
本刊每學期發刊一期，做為本院師生與系友、家長的溝通橋樑。每期報導本院近期研究現況，內容包括人事動態、學人來訪以及國際交流等。期能經由本刊使讀者掌握資訊學院最新動態，促進彼此互動。
Bright carbon dots as fluorescence sensing agents for bacteria and curcumin
(2017-09-01)
Baig, Mirza Muhammad Fahad
;
Chen, Yu-Chie
;
應用化學系
;
Department of Applied Chemistry
Carbon dots (C-dots) are fluorescent nanomaterials that possess good photostability and low toxicity. They have been used as sensing probes and bioimaging agents for a variety of biological species. Numerous methods are available to generate C-dots. Nevertheless, simple and straightforward synthesis methods must be explored for the synthesis of C-dots from inexpensive, natural sources. In this study, we developed a simple method to generate C-dots from inexpensive chicken egg whites through a one-step heating reaction. The size of the generated C-dots was 3.3 +/- 0.4 nm, and the quantum yield of the C-dots was as high as similar to 43%. The as-prepared C-dots can be used as multicolor labeling agents for bacteria such as Staphylococcus aureus and Escherichia coli. Furthermore, the generated C-dots can be used as Forster resonance energy transfer sensing probes for curcumin, which is an active ingredient of turmeric and medicinal pigment. The feasibility of using the C-dots as selective sensing probes to determine the amount of curcumin from complex turmeric powder and condensed turmeric tablets is also demonstrated. (C) 2017 Elsevier Inc. All rights reserved.
【系所動態】本院首創數據科學與工程研究所
(國立交通大學資訊學院, 2017-09)
曾新穆
佈局大數據及人工智慧產業本院首創數據科學與工程研究所
Cliffs versus plains: Can ROSINA/COPS and OSIRIS data of comet 67P/Churyumov-Gerasimenko in autumn 2014 constrain inhomogeneous outgassing?
(2017-09-01)
Marschall, R.
;
Mottola, S.
;
Su, C. C.
;
Liao, Y.
;
Rubin, M.
Context. This paper describes the modelling of gas and dust data acquired in the period August to October 2014 from the European Space Agency's Rosetta spacecraft when it was in close proximity to the nucleus of comet 67P/Churyumov-Gerasimenko. Aims. With our 3D gas and dust comae models this work attempts to test the hypothesis that cliff activity on comet 67P/Churyumov-Gerasimenko can solely account for the local gas density data observed by the Rosetta Orbiter Spectrometer for Ion and Neutral Analysis (ROSINA) and the dust brightnesses seen by the Optical, Spectroscopic, and Infrared Remote Imaging System (OSIRIS) in the considered time span. Methods. The model uses a previously developed shape model of the nucleus. From this, the water sublimation rates and gas temperatures at the surface are computed. The gas expansion is modelled with a 3D Direct Simulation Monte Carlo algorithm. A dust drag algorithm is then used to compute dust volume number densities in the coma, which are then converted to brightnesses using Mie theory and a line-of-sight integration. Furthermore we have studied the impact of topographic re-radiation on the models. Results. We show that gas activity from only cliff areas produces a fit to the ROSINA/COPS data that is as statistically good as a purely insolation-driven model. In contrast, pure cliff activity does not reproduce the dust brightness observed by OSIRIS and can thus be ruled out. On the other hand, gas activity from the Hapi region in addition to cliff activity produces a statistically better fit to the ROSINA/COPS data than purely insolation-driven outgassing and also fits the OSIRIS observations rather well. We found that topographic re-radiation does not contribute significantly to the sublimation behaviour of H2O but plays an important role in how the gas flux interacts with the irregular shape of the nucleus. Conclusions. We demonstrate that fits to the observations are non-unique. We can conclude however that gas and dust activity from cliffs and the Hapi region are consistent with the ROSINA/COPS and OSIRIS data sets for the considered time span and are thus a plausible solution. Models with activity from low gravitational slopes alone provide a statistically inferior solution.
【學術交流】吳毅成教授：從AlphaGo看人工智慧之關鍵技術
(國立交通大學資訊學院, 2017-09)
林珮雯
在 AlphaGo 打敗人類棋王之後，人工智慧（AI）已成為膾炙人口的科技顯學。本院邀請吳毅成教授，從AlphaGo 暢談深度學習與強化式學習等人工智慧關鍵技術，分享他個人研究領域所獲心得，當日孔祥重院士也蒞臨與會，精彩的學術對話，演講現場座無虛席。
N-Channel Zinc Oxide Nanowire: Perylene Diimide Blend Organic Thin Film Transistors
(2017-09-01)
Chen, Shin-Pin
;
Chen, Yan-Sheng
;
Hsieh, Gen-Wen
;
照明與能源光電研究所
;
影像與生醫光電研究所
N-channel solution-processed organic thin film transistors (TFTs) based on a blend network of N,N`-bis(1H,1H-perfluorobutyl)-1,7-dicyanoperylene-3,4: 9,10-tetracarboxylic diimide (PDIF-CN2) and zinc oxide (ZnO) nanowires show remarkable electron field effect mobilities of up to 0.5 cm(2)/ V.s in ambient air, which is about five-fold higher than those based on pristine PDIF-CN2 films. When tested in both bias directions the output and transfer electrical hysteresis of those blend TFTs are negligible. In addition, their low processing temperature and flexible semiconducting layer makes them a highly promising means of realizing high performance, solution-processed n-channel organic TFTs.
具有深度資訊之影像處理方法及其電腦程式產品
(2017-09-01)
郭峻因
;
簡柏宇
本發明提供一種具有深度資訊之影像處理方法，其是利用一過濾模板，擷取出一手勢區域並過濾影像；同時依據目前手勢區域內多個像素的色調值來調整過濾模板的自適應性門檻值，以及依據前一個時間點以及目前時間點間之景深值來調整下一個時間點過濾模板的模板大小。同時揭露一種具有深度資訊之影像處理電腦程式產品。
Discriminative subspace modeling of SNR and duration variabilities for robust speaker verification
(2017-09-01)
Li, Na
;
Mak, Man-Wai
;
Lin, Wei-Wei
;
Chien, Jen-Tzung
;
電機工程學系
Although i-vectors together with probabilistic LDA (PLDA) have achieved a great success in speaker verification, how to suppress the undesirable effects caused by the variability in utterance length and background noise level is still a challenge. This paper aims to improve the robustness of i-vector based speaker verification systems by compensating for the utterance-length variability and noise-level variability. Inspired by the recent findings that noise-level variability can be modeled by a signal-to-noise ratio (SNR) subspace and that duration variability can be modeled as additive noise in the i-vector space, we propose to add an SNR factor and a duration factor to the PLDA model. In this framework, we assume that i-vectors derived from utterances with comparable durations share similar duration-specific information and that i-vectors extracted from utterances within. a narrow SNR range have similar SNR-specific information. Based on these assumptions, an i-vector can be represented as a linear combination of four components: speaker, SNR, duration, and channel. A variational Bayes algorithm is developed to infer this latent variable model via a discriminative subspace training procedure. In the testing stage, different variabilities are compensated for when computing the likelihood ratio. Experiments on Common Conditions 1 and 4 in MST 2012 SRE show that the proposed model outperforms the conventional PLDA and SNR-invariant PLDA. Results also show that the proposed model performs better than the uncertainty-propagation PLDA (UP-PLDA) for long test utterances. (C) 2017 Elsevier Ltd. All rights reserved.
Impact of Enterobius vermicularis infection and mebendazole treatment on intestinal microbiota and host immune response
(2017-09-01)
Yang, Chin-An
;
Liang, Chao
;
Lin, Chia-Li
;
Hsiao, Chiung-Tzu
;
Peng, Ching-Tien
Background Previous studies on the association of enterobiasis and chronic inflammatory diseases have revealed contradictory results. The interaction of Enterobius vermicularis infection in particular with gut microbiota and induced immune responses has never been thoroughly examined. Methodology/Findings In order to answer the question of whether exposure to pinworm and mebendazole can shift the intestinal microbial composition and immune responses, we recruited 109 (30 pinwormnegative, 79 pinworm-infected) first and fourth grade primary school children in Taichung, Taiwan, for a gut microbiome study and an intestinal cytokine and SIgA analysis. In the pinworm-infected individuals, fecal samples were collected again at 2 weeks after administration of 100 mg mebendazole. Gut microbiota diversity increased after Enterobius infection, and it peaked after administration of mebendazole. At the phylum level, pinworm infection and mebendazole deworming were associated with a decreased relative abundance of Fusobacteria and an increased proportion of Actinobacteria. At the genus level, the relative abundance of the probiotic Bifidobacterium increased after enterobiasis and mebendazole treatment. The intestinal SIgA level was found to be lower in the pinworm-infected group, and was elevated in half of the mebendazole-treated group. A higher proportion of pre-treatment Salmonella spp. was associated with a non-increase in SIgA after mebendazole deworming treatment. Conclusions/Significance Childhood exposure to pinworm plus mebendazole is associated with increased bacterial diversity, an increased abundance of Actinobacteria including the probiotic Bifidobacterium, and a decreased proportion of Fusobacteria. The gut SIgA level was lower in the pinworminfected group, and was increased in half of the individuals after mebendazole deworming treatment.
trans-Stilbene C-Glycosides: Synthesis by a Microwave-Assisted Heck Reaction and Evaluation of the SGLT-2 Inhibitory Activity
(2017-09-01)
Ponnapalli, Kalyana Kumar
;
Adak, Avijit Kumar
;
Das, Anindya
;
Song, Jen-Shin
;
Wu, Szu-Huei
A protocol for the microwave-assisted Heck coupling reaction of C-aryl glycosides and styrenes has been developed for the synthesis of mono-and bis(C-glycoside) stilbenes. This method exclusively provides C-glycoside trans-stilbenes in good yields. The Pd-catalyzed Heck coupling re-action was successfully applied to various functionalized C-glycosyl aryl iodides and various substituted styrenes to deliver several C-glycoside trans-stilbenes with high selectivity. The obtained C-glycosyl trans-stilbenes were also examined for human SGLT-2 inhibitory activity.
A note on the fractional perimeter and interpolation
(2017-09-01)
Ponce, Augusto C.
;
Spector, Daniel
;
應用數學系
;
Department of Applied Mathematics
We present the fractional perimeter as a set-function interpolation between the Lebesgue measure and the perimeter in the sense of De Giorgi. Our motivation comes from a new fractional Boxing inequality that relates the fractional perimeter and the Hausdorff content and implies several known inequalities involving the Gagliardo seminorm of the Sobolev spaces W-alpha,W-1 of order 0 < alpha < 1. (C) 2017 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved.
Ultrafast relaxation dynamics of nitric oxide synthase studied by visible broadband transient absorption spectroscopy
(2017-09-01)
Hung, Chih-Chang
;
Yabushita, Atsushi
;
Kobayashi, Takayoshi
;
Chen, Pei-Feng
;
Liang, Keng S.
Ultrafast dynamics of endothelial nitric oxide synthase (eNOS) oxygenase domain was studied by transient absorption spectroscopy pumping at Soret band. The broadband visible probe spectrum has visualized the relaxation dynamics from the Soret band to Q-band and charge transfer (CT) band. Supported by two-dimensional correlation spectroscopy, global fitting analysis has successfully concluded the relaxation dynamics from the Soret band to be (1) electronic transition to Q-band (0.16 ps), (2) ligand dissociation and CT (0.94 ps), (3) relaxation of the CT state (4.0 ps), and (4) ligand rebinding (59 ps). (C) 2017 Elsevier B.V. All rights reserved.