Browsing by Issue Date, starting with "2015-08-01"

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編案：汙名連線的可能性
(深河出版有限公司, 2015-08-01)
人間思想編輯部
Homoepitaxial growth and stress analysis of (111) diamond film with embedded gold islands
(2015-08-01)
Chiu, Kim-An
;
Wu, Ping-Hsun
;
Peng, Chun-Yen
;
Tian, Jr-Sheng
;
Chang, Li
The internal stress in high-quality (111) homoepitaxial diamond film grown on high-pressure high temperature (HPHT) synthesized single crystal diamond substrate by chemical vapor deposition (CVD) can be reduced effectively by embedding Au islands in diamond. Au islands formed from an Au layer deposited on the diamond substrate by electron beam evaporation can be obtained after hydrogen plasma annealing. Transmission electron microscopy and X-ray diffraction results show that the Au islands covered with CVD diamond have a size in a few hundreds of nanometers and are oriented with diamond in the orientation relationship of {111}Au//{111}(Dia) and < 110 > Au//< 110 > Dia. The surfaces of the CVD diamond films grown on substrate with and without Au coating exhibit cracks when the film thickness reaches 3.5 mu m. As evaluated from the Raman peak shift, it is shown that the internal tensile stress in the film with Au islands is less than in the same thick film on substrate without Au coating. A crack-free (111) homoepitaxial diamond film in the same thickness can be obtained by insertion of multilayers of Au islands in CVD diamond. (c) 2015 Elsevier Ltd. All rights reserved.
Novel junctionless silicon-oxide-nitride-oxide-silicon memory devices with field-enhanced poly-Si nanowire structure
(2015-08-01)
Chou, Chia-Hsin
;
Chan, Wei-Sheng
;
Wu, Chun-Yu
;
Lee, I-Che
;
Liao, Ta-Chuan
In this work, a novel gate-all-around (GAA) low-temperature poly-Si (LTPS) junctionless (JL) silicon-oxide-nitride-oxide-silicon (SONOS) nonvolatile memory device with a field-enhanced nanowire (NW) structure has been proposed to improve the programing/erasing (P/E) performance. Each nanowire has three sharp corners fabricated by a sidewall spacer formation technique to obtain high local electrical fields. Owing to the higher carrier concentration in the channel and the high local electrical field from the three sharp corners, such a JL SONOS memory device exhibits a significantly enhanced P/E speed, a larger memory window, and better data retention properties than a conventional inversion mode NW-channel memory device. (C) 2015 The Japan Society of Applied Physics
MicroRNA-122 is a potential regulator of DNA methylation partly by affecting the global level profile of 5hmC
(2015-08-01)
Tsou, Ann-Ping
;
Wang, Kuan-Hua
;
Huang, Hsi-Yuan
;
Chen, Li-Jung
;
Liu, Tze-Tze
後記：重返馬來西亞
(深河出版有限公司, 2015-08-01)
蘇穎欣
全球團結對抗單邊主義
(深河出版有限公司, 2015-08-01)
巴斯卡拉．T．瓦達亞
;
林家瑄
Stable and Wavelength-Tunable Self-Injected Reflective Semiconductor Optical Amplifier-Based Fiber Laser
(2015-08-01)
Wu, Yu-Fu
;
Yeh, Chien-Hung
;
Chow, Chi-Wai
;
Sung, Jiun-Yu
;
Chen, Jing-Heng
In this investigation, we propose and demonstrate a stable and wavelength-tunable self-injected reflective semiconductor optical amplifier (RSOA)-based laser by using the Faraday rotator mirror (FRM) and the fiber mirror (FM) serving as a reflected element, respectively. Here, a 1.2-GHz RSOA can be enhanced to similar to 3 GHz by utilizing a self-injected mechanism. In the measurement, applying the optical orthogonal frequency-division multiplexing quadrature amplitude modulation (OFDM-QAM) with a bit-loading algorithm on the self-injected RSOA directly, the proposed laser can achieve a 3.5-Gb/s data rate in a 20-km single-mode-fiber transmission below a forward error correction (FEC) threshold. Moreover, the related output performance of the proposed RSOA-based laser is also discussed, whereas the FRM and the FM are utilized for comparisons.
Synthesis of nanostructures in nanowires using sequential catalyst reactions
(2015-08-01)
Panciera, F.
;
Chou, Y. -C.
;
Reuter, M. C.
;
Zakharov, D.
;
Stach, E. A.
Nanowire growth by the vapour-liquid-solid (VLS) process enables a high level of control over nanowire composition, diameter, growth direction, branching and kinking, periodic twinning, and crystal structure. The tremendous impact of VLS-grown nanowires is due to this structural versatility, generating applications ranging from solid-state lighting and single-photon sources to thermoelectric devices. Here, we show that the morphology of these nanostructures can be further tailored by using the liquid droplets that catalyse nanowire growth as a \'mixing bowl\', in which growth materials are sequentially supplied to nucleate new phases. Growing within the liquid, these phases adopt the shape of faceted nanocrystals that are then incorporated into the nanowires by further growth. We demonstrate this concept by epitaxially incorporating metal silicide nanocrystals into Si nanowires with defect-free interfaces, and discuss how this process can be generalized to create complex nanowire-based heterostructures.
Extended depth-of-field 3D endoscopy with synthetic aperture integral imaging using an electrically tunable focal-length liquid-crystal lens
(2015-08-01)
Wang, Yu-Jen
;
Shen, Xin
;
Lin, Yi-Hsin
;
Javidi, Bahram
;
光電工程學系
Conventional synthetic-aperture integral imaging uses a lens array to sense the three-dimensional (3D) object or scene that can then be reconstructed digitally or optically. However, integral imaging generally suffers from a fixed and limited range of depth of field (DOF). In this Letter, we experimentally demonstrate a 3D integral-imaging endoscopy with tunable DOF by using a single large-aperture focal-length-tunable liquid crystal (LC) lens. The proposed system can provide high spatial resolution and an extended DOF in synthetic-aperture integral imaging 3D endoscope. In our experiments, the image plane in the integral imaging pickup process can be tuned from 18 to 38 mm continuously using a large-aperture LC lens, and the total DOF is extended from 12 to 51 mm. To the best of our knowledge, this is the first report on synthetic aperture integral imaging 3D endoscopy with a large-aperture LC lens that can provide high spatial resolution 3D imaging with an extend DOF. (C) 2015 Optical Society of America
Observation of coherent acoustic phonon in titanyl phthalocyanine thin solid films
(2015-08-01)
Ahn, Hyeyoung
;
Su, Shiu-Ho
;
光電工程學系
;
Department of Photonics
Ultrafast exciton dynamics is investigated in titanyl phthalocyanine (TiOPc) micrograin films in this study. Exponential exciton relaxation and oscillatory responses are observed in transient reflectivity measurements of the films. Laser-induced coherent acoustic waves (LCAW) are proposed to be responsible for this oscillation. Despite their fast attenuation with the increase in temperature, LCAWs are successfully detected at room temperature through probing at a large oblique angle near the low-energy absorption edge of the Q-Band. From the oscillation period of the LCAW, the sound velocity is estimated to be similar to 3.1 x 10(3) m/s, and an acoustic echo arising from the boundary between the films and substrate is also observed. (C) 2015 The Japan Society of Applied Physics
Is routine single-incision laparoscopic cholecystectomy feasible? A retrospective observational study
(2015-08-01)
Chuang, Shu-Hung
;
Yang, Wen-Jui
;
Chang, Chih-Ming
;
Lin, Chih-Sheng
;
Yeh, Meng-Ching
BACKGROUND: Single-incision laparoscopic cholecystectomy (SILC) has been shown to be safe for uncomplicated gallbladder diseases. Routinely applying SILC is debatable. METHODS: Two hundred SILCs were performed with single-incision multiple-port longitudinal-array and self-camera techniques. RESULTS: Eighty-eight (44%) procedures were scheduled for complicated diseases. The routine group had a higher comorbidity rate, a lower preoperative endoscopic retrograde cholangiopancreatography rate, a higher intraoperative cholangiography rate, a higher proportion of complicated gallbladder diseases, shorter operative time, more intraoperative blood loss, and lower postoperative pethidine dose than the selective group (the first 73 patients). The conversion and complication rates showed no statistical difference. It took fewer cases but longer time to pass the learning phase of SILC for complicated gallbladder diseases. The multivariate analysis showed that male sex and complicated gallbladder diseases were associated with a higher procedure conversion rate, and increased patient age was related to a higher complication rate. CONCLUSIONS: Routine SILC for benign gallbladder diseases is feasible in the experienced phase. Practicing SILC for uncomplicated gallbladder diseases helps to achieve competence in this technique for complicated diseases. (C) 2015 Elsevier Inc. All rights reserved.
Efficient and stable polymer solar cells prepared using plasmonic graphene oxides as anode buffers
(2015-08-01)
Chen, Chung-Lei
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Chuang, Ming-Kai
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Chen, Chyong-Hua
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Chu, Chih-Wei
;
Keshtov, Muchamed L.
Gold nanoparticle-decorated graphene oxides (AuNP-GOs) have been incorporated into inverted organic photovoltaic devices (OPVs) as anode interlayers. The OPVs fabricated with AuNP-GOs exhibited significant improvement in both the short-circuit current and fill factor compared to a reference device fabricated with neat GOs. We attribute the improvement in the efficiency of the device to the plasmonic effects of the AuNP-GO nanocomposites, which induced local enhancement of the electromagnetic field. More importantly, the inverted OPVs also exhibited better reliability after the use of AuNP-GO nanocomposites.
Application of multi-scale (cross-) sample entropy for structural health monitoring
(2015-08-01)
Lin, Tzu-Kang
;
Liang, Jui-Chang
;
土木工程學系
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Department of Civil Engineering
This study proposes an information-theoretic structural health monitoring (SHM) system based on multi-scale entropy (MSE) and multi-scale cross-sample entropy (MSCE). By measuring the ambient vibration signal from a structure, the damage condition can be rapidly evaluated via MSE analysis. The damage location can then be detected by analyzing the signals of different floors under the same damage condition via MSCE analysis. Moreover, a damage index is proposed to efficiently quantify the SHM process. Unlike some existing SHM methods, no experimental database or numerical model is required. Instead, a reference measurement of the current stage can initiate and launch the SHM system. A numerical simulation of a four-story steel structure is used to verify that the damage location and condition can be detected by the proposed SHM algorithm, and the location can be efficiently quantified by the damage index. A seven-story scaled-down benchmark structure is then employed for experimental verification. Based on the results, the damage condition can be correctly assessed, and average accuracy rates of 63.4 and 86.6% for the damage location can be achieved using the MSCE and damage index methods, respectively. As only the ambient vibration signal is required with a set of initial reference measurements, the proposed SHM system can be implemented practically with low cost.
第十支隊鬥爭史
(深河出版有限公司, 2015-08-01)
莫哈默．沙勒．藍利(Mohamed Salleh Lamry)
;
吳小保
LUTSim: A Look-Up Table-Based Thermal Simulator for 3-D ICs
(2015-08-01)
Lee, Yu-Min
;
Pan, Chi-Wen
;
Huang, Pei-Yu
;
Yang, Chi-Ping
;
電機資訊學士班
To sustain Moore\'s law, three-dimensional integrated circuit (3-D IC) is a promising solution to achieve high performance and low cost targets. However, its operating temperature is higher than that of a 2-D IC because of its high power density of stacked dies and ill of heat dissipation capability. Therefore, on-chip thermal effects have become major concerns of 3-D ICs. Utilizing look-up table approach, this paper, LUTSim, provides two thermal simulation engines, I-LUTSim and S-LUTSim, to efficiently calculate the thermal profile of a 3-D IC. I-LUTSim is suitable for full-chip thermal analysis, and S-LUTSim is suited for incremental-thermal updating. With utilizing the prebuilt tables, compared with a commercial tool ANSYS, the absolute error of I-LUTSim is less than 0.29%. Moreover, with negligible loss of accuracy, I-LUTSim can be 38.8 times faster than a well-known matrix solver SuperLU for performing full-chip thermal simulation. Besides, S-LUTSim can be over 1.05 million times faster than SuperLU for adjusting the thermal profile after inserting/removing a through silicon via.
Mobile Ticket Dispenser System With Waiting Time Prediction
(2015-08-01)
Lin, Yun-Wei
;
Lin, Yi-Bing
;
資訊工程學系
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Department of Computer Science
A ticket dispenser (TD) is used to assist customers with the waiting process in, e.g., a restaurant. This paper deploys a mobile TD system (MTDS) with waiting time prediction to enhance the user experience while waiting. For example, the MTDS for a restaurant allows a customer to remotely draw a ticket for a meal order anywhere through a smartphone before she/he arrives at the restaurant and therefore reduces her/his waiting time. The developed MTDS system can dynamically adjust the predicted waiting time. We propose two output indicators and develop a discrete-event simulation model to investigate the performance of the predicted time adjustment (PTA) mechanism for the MTDS. With a proper frequency of recalculation for the predicted waiting times, this paper indicates that the waiting times can be more accurately predicted without consuming more wireless network resources and power of mobile devices.
Start-up of simultaneous partial nitrification, anammox and denitrification (SNAD) process in sequencing batch biofilm reactor using novel biomass carriers
(2015-08-01)
Daverey, Achlesh
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Chen, Yi-Chian
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Dutta, Kasturi
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Huang, Yu-Tzu
;
Lin, Jih-Gaw
Simultaneous partial nitrification, anammox and denitrification (SNAD) process was started-up in a 2.5 L sequencing batch biofilm reactor (SBBR) using novel biomass carriers. The SNAD process took only 51 d for start-up at nitrogen loading rate (NLR) and organic loading rate (OLR) of 120 and 60 g/m(3)-d, respectively. Long-term stable operation of SNAD process was observed at NLR and OLR of 360 and 180 g/m(3)-d with average total nitrogen and COD removal efficiencies of >88% and >90%, respectively. The values of conversion ratio Y(NO2-+NO3-)/NH4+ remained below 0.11 after the start-up period, which further confirmed the long-term stability of SNAD process. Results of polymerase chain reaction (PCR), qualitative PCR, and scanning electron microscopic (SEM) analysis of sludge samples confirmed the co-existence and enrichment of AOB, anammox bacteria and denitrifying bacteria in the reactor and biofilm formation on to the carriers. (C) 2015 Elsevier Ltd. All rights reserved.
Can we select multiple colours simultaneously? Evidence for serial processing from left to right
(2015-08-01)
Lo, Shih-Yu
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Goodbourn, Patrick
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Holcombe, Alex
;
交大名義發表
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National Chiao Tung University
A Novel Approach Using Discrete Grain-Boundary Traps to Study the Variability of 3-D Vertical-Gate NAND Flash Memory Cells
(2015-08-01)
Wang, Pei-Yu
;
Tsui, Bing-Yue
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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
The 3-D NAND flash memory architectures will be a future trend, because they provide high memory capacity without aggressively scaling down. A vertical-gate (VG) structure composed of polysilicon (poly-Si) channels is a promising 3-D structure that could facilitate realizing an extremely tight-pitch NAND flash memory cell with high memory capacity. However, the variability of the VG memory cell induced by grain boundaries in the poly-Si channels is a major concern for aggressively scaled-down memory cells. In this paper, a discrete-trap approach is applied to emulate the real trap effects in a 3-D memory cell, and the 3-D structure geometry effects and the variation in the threshold voltage (V-T) induced by the discrete grain-boundary traps are studied. Various Delta V-T behaviors related to the structure geometry and trap position are examined. The effect of varying the body thickness on the Delta V-T is stronger than that of varying the channel width. This paper presents various cases for using the discrete-trap approach to study the variability of V-T in 3-D VG memory cells.
Nucleophilic Conjugate 1,5-Addition of Gilman Reagents to (E)-Hex-2-en-4-ynedioates: An Access to ()-Substituted Muconates
(2015-08-01)
Tai, Hung-Che
;
Chavan, Arjun S.
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Chuang, Shih-Ching
;
應用化學系
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Department of Applied Chemistry
An unusual nucleophilic conjugate addition of organocuprates to enynedioates resulted in chemo- and regioselective formation of ()-addition products, rather than ()-addition products, in moderate to good yields. This addition pattern is different from that with organophosphanes or alkyl amines, and presents a short and efficient method for the preparation of various ()-alkyl- or -aryl-substituted muconates compared with other synthetic approaches.