Browsing by Issue Date, starting with "2018-04-01"

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Employing Hybrid sub-Nyquist Sampling Rates to Support Heterogeneous Services of Varying Capacity in 25-Gbps DDM-OFDM-PON
(2018-04-01)
Hsu, Jhih-Hao
;
Yu, Min
;
Wei, Chia-Chien
;
Lin, Chi-Hsiang
;
Lin, Chun-Ting
Delay-division-multiplexing (DDM) involves the use of signal preprocessing for the detection of data via sub-Nyquist analog-to-digital sampling, based on preallocated relative sampling delays among optical network users (ONUs) in an orthogonal frequency-division multiplexing (OFDM) passive optical network (PON). If a DDM-PON consists of M virtual groups, the sampling rate at the receivers is only 1/M of the Nyquist rate, but the maximum capacity of each ONU is fixed at 1/M of the total capacity. In this study, we developed a novel DDM scheme that uses hybrid sub-Nyquist sampling rates to accommodate heterogeneous services of different capacities in an OFDM-PON. To equalize the transmission performances using hybrid sub-Nyquist sampling rates, the modification of preprocessing was proposed, and its necessity was demonstrated. Without loss of generality, we experimentally demonstrated a 25-Gbps DDM-OFDM-PON using hybrid sampling at 1/2, 1/8, and 1/32 (or 1/8, 1/16, and 1/32) of the Nyquist rate. Compared to a DDM-PON with a fixed sub-Nyquist rate, the received signals based on hybrid sub-Nyquist sampling rates show similar sensitivities. A loss budget of 26 dB was experimentally achieved using all sub-Nyquist sampling rates after employing the modified preprocessing.
Liouville theorems for the stationary Navier-Stokes equation on a hyperbolic space
(2018-04-01)
Chan, Chi Hin
;
Czubak, Magdalena
;
應用數學系
;
Department of Applied Mathematics
The problem for the stationary Navier-Stokes equation in 3D under finite Dirichlet norm is open. In this, paper we answer the analogous question on the 3D hyperbolic space. We also address other dimensions and more general manifolds. (C) 2017 Elsevier Inc. All rights reserved.
台灣足球的興衰
(2018-04-01)
李哲君
;
Department of Communication and Technology
;
傳播與科技學系
【台灣足球】專題

台灣長期有「足球沙漠」之稱，但其實早在幾十年前，台灣足球卻曾是亞洲霸主。下表帶你一窺台灣足球的興衰。
A Miniature 200-GHz Subharmonic Mixer With a Folded 180 degrees Hybrid Using Equal-Length Edge- and Broadside-Coupled Lines
(2018-04-01)
Chang, Wei Ling
;
Meng, Chinchun
;
電機工程學系
;
Department of Electrical and Computer Engineering
A miniature 180 degrees hybrid is proposed to demonstrate a 200-GHz subharmonic mixer (SHM) using a 0.18-mu m SiGe BiCMOS process. The reduced-size 180 degrees hybrid is achieved by folding the shared coupled lines between the in-phase power divider and the out-of-phase Marchand balun. The shared coupled lines demand an equal length design for the coupled lines at both Delta and Sigma ports of an 180 degrees hybrid. For the SHM, edge coupling for the Sigma section and broad-side coupling for the Delta section are employed to compensate the different input frequencies at Delta and Sigma ports. The SHM achieves a conversion gain around -21 dB from 175 to 200 GHz with 0-dBm LO pumping power. The LO-to-RF isolation is better than 32 dB within the operating bandwidth.
Flexible Droplet Routing in Active Matrix-Based Digital Microfluidic Biochips
(2018-04-01)
Lu, Guan-Ruei
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Kuo, Chun-Hao
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Chiang, Kuen-Cheng
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Banerjee, Ansuman
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Bhattacharya, Bhargab B.
The active matrix (AM)-based architecture offers many advantages over conventional digital electrowetting-on-dielectric (EWOD) microfluidic biochips, such as the capability of handling variable-size droplets, more flexible droplet movement, and precise control over droplet navigation. However, a major challenge in choosing the routing paths is to decide when the droplets are to be reshaped depending on the congestion of the intended path, or split- and route sub droplets,and merging them at their respective destinations. As the number of microelectrodes in AM-EWOD chips is large, the path selection problem becomes further complicated. In this article, we propose a negotiation-guided flow based on routing of subdroplets that obviates the explicit need for deciding when the droplets are to be manipulated, yet fully utilizing the power of droplet reshaping, splitting, and merging them to facilitate their journey. The proposed algorithm reduces routing cost and provides more freedom in deadlock avoidance in the presence of multiple routing tasks by assigning certain congestion penalty for sibling subdroplets and fluidic penalty for heterogeneous droplets. Compared to existing techniques, it reduces latest arrival time by an average of 29% for several benchmark and random test suites. Furthermore, our method is observed to provide 100% routability of nets for all test cases, whereas existing and baseline routers fail to produce feasible solutions in many instances. We also propose a reliable mode droplet routing strategy where the number of unreliable splitting operations can be reduced by paying a small penalty on latest arrival time.
PSPC1 mediates TGF-beta 1 autocrine signalling and Smad2/3 target switching to promote EMT, stemness and metastasis
(2018-04-01)
Yeh, Hsi-Wen
;
Hsu, En-Chi
;
Lee, Szu-Shuo
;
Lang, Yaw-Dong
;
Lin, Yuh-Charn
Activation of metastatic reprogramming is critical for tumour metastasis. However, more detailed knowledge of the underlying mechanism is needed to enable targeted intervention. Here, we show that paraspeckle component 1 (PSPC1), identified in an aberrant 13q12.11 locus, is upregulated and associated with poor survival in patients with cancer. PSPC1 promotes tumorigenesis, epithelial-to-mesenchymal transition (EMT), stemness and metastasis in multiple cell types and in spontaneous mouse cancer models. PSPC1 is the master activator for transcription factors of EMT and stemness and accompanies c-Myc activation to facilitate tumour growth. PSPC1 increases transforming growth factor-ss 1 (TGF-ss 1) secretion through an interaction with phosphorylated and nuclear Smad2/3 to potentiate TGF-ss 1 autocrine signalling. Moreover, PSPC1 acts as a contextual determinant of the TGF-ss 1 pro-metastatic switch to alter Smad2/3 binding preference from tumour-suppressor to pro-metastatic genes. Having validated the PSPC1-Smads-TGF-ss 1 axis in various cancers, we conclude that PSPC1 is a master activator of prometastatic switches and a potential target for anti-metastasis drugs.
肉品檢測裝置
(2018-04-01)
冉曉雯
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孟心飛
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呂家榮
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呂明峰
;
洪勝富
一種肉品檢測裝置，包含一取樣單元、一供氣單元、一過濾單元、一感測單元及一分析顯示單元。藉由讓該取樣單元具有一可容置待檢測肉品並與外界隔離的容置空間，因此，在量測過程中不會受到外界影響，而藉由供氣單元、過濾單元及感測單元的相配合，可讓肉品的揮發性氣體在感測過程中保持低溼度並減少干擾粒子的影響，而可更準確快速的量測。
幸福路上　對幸福的追求與幻滅
(2018-04-01)
徐仟妤
;
Department of Communication and Technology
;
傳播與科技學系
【台灣動畫的美麗與哀愁】專題

幸福路上是台灣製作的動畫長片，以獨特的女性成長視角，反映70～90年代台灣政治的變遷，以及台灣社會在大時代中尋找自我定位的迷茫。
喚醒客家魂　曾仲瑋用音樂傳承
(2018-04-01)
凃易暄
;
Department of Communication and Technology
;
傳播與科技學系
【客家音樂　從傳統到現代】專題

曾入圍金曲客家歌手的曾仲瑋，以客家生活為發想創作，並融入傳統山歌唸謠，透過音樂將客家文化傳承下去。
Digital forensics of microscopic images for printed source identification
(2018-04-01)
Tsai, Min-Jen
;
Yuadi, Imam
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資訊管理與財務金融系註：原資管所+財金所
;
Department of Information Management and Finance
When trying to identify a printed forged document, examining digital evidence can prove to be a challenge. In this study, microscopic images are used for printed source identification due to their high magnification properties resulting in detailed texture and structure information. Prior research implemented a scanner as a digitizing technique to resolve very fine printed identification, but this technique provided limited information on the resolution and magnification of the sample. In contrast, the performance of microscopy techniques can retrieve the shape and surface texture of a printed document with differing micro structures among printer sources. To explore the relationship between source printers and images obtained by the microscope, the proposed approach utilizes image processing techniques and data exploration methods to calculate many important statistical features, including: Local Binary Pattern (LBP), Gray Level Co-occurrence Matrix (GLCM), Discrete Wavelet Transform (DWT), Spatial filters, the Wiener filter, the Gabor filter, Haralick, and SFTA features. Among the different set of features, the LBP approach achieves the highest identification rate and is significantly superior to other methods. As a result, the proposed technique using microscopic images achieves a high classification accuracy rate, which shows promising applications for real world digital forensics research.
The natural history of the patients with Duchenne muscular dystrophy in Taiwan: A medical center experience
(2018-04-01)
Liang, Wen-Chen
;
Wang, Chen-Hua
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Chou, Po-Ching
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Chen, Wan-Zi
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Jong, Yuh-Jyh
Background: Duchenne muscular dystrophy (DMD) is the most common hereditary muscular dystrophy and caused by DMD gene mutation. In addition to progressive proximal muscle weakness, respiratory, orthopedic, and gastrointestinal complications are often observed in DMD. The natural history of patients with DMD in Taiwan has not been reported thus far. Methods: Medical records of 39 patients who received a diagnosis of DMD between 1999 and 2016 at Kaohsiung Medical University Hospital were reviewed. The diagnosis of DMD was confirmed through muscle biopsy or DMD genetic analysis. Results: The mean onset age and mean follow-up period were 2.75 years and 6.76 years, respectively. Seventeen patients (43.5%) had a family history of DMD. The mean full intelligence quotient of the patients was 71.08, and the mean age of walking ability loss was 9.7 years (25 patients). The mean onset age of respiratory insufficiency was 10.64 years with a decline rate of 5.18% per year (25 patients). The mean onset age of cardiomyopathy was 14.69 years (seven patients). The mean onset age of scoliosis was 13.29 years with a progression rate of 11.48 degrees per year (14 patients). Eleven (28.2%) and eight (20.5%) patients had deletions and duplications of DMD, respectively. Fourteen patients (35.9%) had point mutations or small deletions or insertions. Five patients received only multiplex ligation-dependent probe amplification (MLPA) analysis and exhibited neither deletion nor duplication. No mutation was identified in one patient through both MLPA and exon sequencing. Conclusion: The clinical phenotypes and disease course in our cohort were consistent with that reported in previous studies. However, the proportion of point mutations or small deletions or insertions in our study was considerably higher than that in reports from other populations. Cardiac ejection fraction was found not a reliable biomarker for identifying cardiac problems, discovering a better parameter is necessary. Copyright (C) 2017, Taiwan Pediatric Association. Published by Elsevier Taiwan LLC.
Tuning the Color Temperature of White-Light-Emitting Electrochemical Cells by Laser-Scanning Perovskite-Nanocrystal Color Conversion Layers
(2018-04-01)
Wu, Wen-Kuang
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Wang, Cheng-Ming
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Chan, Ming-Che
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Lien, Jiun-Yi
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Su, Yong-Ming
The development of white-light-emitting electrochemical cells (LECs) has attracted great attention owing to their numerous advantages. Recently, perovskite materials have also shown many outstanding optoelectronic properties in light absorption and emission, and hence they are suitable for serving as the color conversion layers (CCLs) in solid-state white-light-emitting diodes (LEDs). Here, white LECs were fabricated by integrating non-doped blue-green LECs with CCLs made of a single composition of perovskite nanocrystal (NCs). Moreover, the correlated color temperatures (CCTs) of the white LECs can be tuned by modifying the optical properties of the perovskite NCs, in the same way as so as the color conversion properties of CCLs are tuned, through laser scan. By controlling the laser power, scanning number, and duty cycle of the scanned grating patterns on perovskite-NC CCLs, the CCTs of the white LECs can be tuned from 2502 K to nearly 4300 K. Since this method is much different from that used with conventional CCLs, which use multiple compositions of perovskite NCs to produce white light, the inherent anion-exchange issue of perovskite NCs can be avoided.
Consumer driven product technology function deployment using social media and patent mining
(2018-04-01)
Trappey, Amy J. C.
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Trappey, Charles V.
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Fan, Chin-Yuan
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Lee, Ian J. Y.
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管理科學系
The capability of identifying real-time customer needs is critical for manufacturers that provide short life cycle consumer products such as smart phones. Companies need to form research and development (R&D) strategies to improve key functional features for short lifespan products to reflect the adoption of innovative technologies and changing customer expectations. With the pervasive use of the Internet, this research crawls and analyzes the online voice of customers (VoC), overcoming the time lag of offline surveys, to identify and prioritize product functions for deployment using extended quality function deployment (eQFD) models. In this research, the novel analytics of the manufacturer's patent portfolio is added as an additional eQFD dimension to map ranked functional improvements to a manufacturer's R&D capabilities. Thus, a computer supported eQFD system is developed to perform the unique mappings and gap analyses between the VoC, the prioritized product functions, and the manufacturer's patent portfolio. The newly developed eQFD methodology and its novel discoveries are demonstrated in detail using a case study of three smart phones launched during the same time frame. The products include the Samsung Galaxy 57, the Huawei Honor 5X, and the ASUS Zenfone 3. The newly developed methodology is generally applicable to support VoC-centric product function deployment and R&D strategic planning in other domains.
Fabrication and characterization of novel gate-all-around polycrystalline silicon junctionless field-effect transistors with ultrathin horizontal tube-shape channel
(2018-04-01)
Chang, You-Tai
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Peng, Kang-Ping
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Li, Pei-Wen
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Lin, Horng-Chih
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電機學院
In this paper, we report on a novel fabrication process for the production of junctionless field-effect transistors with an ultrathin polycrystalline silicon (poly-Si) tube channel in a gate-all-around (GAA) configuration. The core of the poly-Si tube channel is filled with either a silicon nitride or a silicon oxide layer, and the effects of the core layers on the device characteristics are evaluated. The devices show excellent switching performance, thanks to the combination of the ultrathin tube channel and the GAA structure. Hysteresis loops in the transfer characteristics of the nitride-core devices are observed, owing to the dynamic trapping of electrons in the nitride core. (C) 2018 The Japan Society of Applied Physics.
鋼鐵人　領漫威重返榮耀的英雄
(2018-04-01)
游允彤
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Department of Communication and Technology
;
傳播與科技學系
【Marvel　讓我們驚嘆的英雄電影】專題

《鋼鐵人》如何拯救一度倒閉的漫威公司，並開創龐大的漫威電影宇宙。
Scattering of anti-plane shear waves by arbitrarily distributed circular cylinders in a functionally graded multiferroic fibrous composite
(2018-04-01)
Kuo, Hsin-Yi
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Huang, Yu-An
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Sun, Chi-Hsiang
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土木工程學系
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Department of Civil Engineering
In this work, a theoretical framework is developed for the multiple scattering of an anti-plane shear wave by a functionally graded multiferroic fibrous composite. The composite consists of arbitrarily distributed circular cylinders and may have different sizes and material constituents. The cylinders are exponentially graded along the radial direction. We exploit the multipole expansions, transition matrix, and Graf's addition/binomial expansion theorems to obtain a complete solution of the multiple scattering problem in the scenario of functionally graded multiferroic composites. These solved magneto-electro-elastic fields are then used to obtain the directivity patterns of the scattered wave, dynamic stress (electric displacement/magnetic flux) concentration factors, and scattering cross sections. Numerical results reveal the profound influence of the functionally graded parameter, the material properties of constituent phases, the number of inclusions, as well as the frequency of a propagating SH wave on the scattered field induced by the functionally graded fibers. It is expected that the formulation and numerical results serve as useful references for the design and manufacture of functionally graded piezoelectric-piezomagnetic fibrous composites under dynamic loadings.
Simultaneous drug delivery and cellular imaging using graphene oxide
(2018-04-01)
Cheng, Sheng-Jen
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Chiu, Hsien-Yi
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Kumar, Priyank V.
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Hsieh, Kuan Yu
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Yang, Jia-Wei
Graphene oxide (GO), a derivative of graphene, and its related nanomaterials have attracted much attention in recent years due to the excellent biocompatibility and large surface area of GO with abundant oxygen functional groups, which further enable it to serve as a nano- bio interface. Herein, we demonstrate the induction of blue fluorescence in GO suspensions via a mild thermal annealing procedure. Additionally, this procedure preserves the oxygen functional groups on the graphene plane which enables the conjugation of cancer drugs without obvious cytotoxicity. Consequently, we demonstrate the capability of GO to simultaneously play the dual- role of a: (i) cellular imaging agent and (ii) drug delivery agent in CT26 cancer cells without the need for additional fluorescent protein labeling. Our method offers a simple, controllable strategy to tune and enhance the fluorescence property of GO, which shows potential for biomedical applications and fundamental studies.
Normal Development of the Corpus Callosum and Evolution of Corpus Callosum Sexual Dimorphism in Infancy
(2018-04-01)
Chang, Chaw-Liang
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Chiu, Nan-Chang
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Yang, Yi-Chen
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Ho, Che-Sheng
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Hung, Kun-Long
Objectives-The aim of this study was to establish reference ranges for the corpus callosum in infancy and to clarify how sexual dimorphism evolves between the fetal stage and infancy. Methods-Normal sonograms from cerebral ultrasonographic examinations of 1- to 6-month-old healthy full-term infants were selected. The length and thickness of the corpus callosum were determined, and the effect of sex on these values was analyzed. Studies on corpus callosum sexual dimorphism were reviewed. Results-In total, sonograms from 236 1- to 6-month-old infants (120 male and 116 female) were collected, and the typical values (5th-95th percentiles) of the corpus callosum were determined for each group. During the first 2 months, with and without brain size adjustment, the corpus callosum in female infants was significantly thicker than that in male infants (mean thickness +/- SD: 1 month, male infant, 1.8 +/- 0.3 mm; female infant, 2.1 +/- 0.3mm; P=.005; 2 months, male infant, 1.8 +/- 0.2 mm; female infant, 2.0 +/- 0.3mm; P=.002). The corpus callosum thickness of male and female infants had no significant differences after 2 months of age. Sexual dimorphism was not detected in corpus callosum length. Conclusions-Our study provides reference data on typical corpus callosum development in infants. In the fetal period and early infancy, the corpus callosum in female infants is thicker than that in male infants. From 3 months onward, the corpus callosum sexual dimorphism becomes insignificant throughout childhood. The evolvement of corpus callosum sexual dimorphism suggests that maternal factors may influence brain development.
Kaleido: Visualizing Big Brain Data with Automatic Color Assignment for Single-Neuron Images
(2018-04-01)
Wang, Ting-Yuan
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Chen, Nan-Yow
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He, Guan-Wei
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Wang, Guo-Tzau
;
Shih, Chi-Tin
Effective 3D visualization is essential for connectomics analysis, where the number of neural images easily reaches over tens of thousands. A formidable challenge is to simultaneously visualize a large number of distinguishable single-neuron images, with reasonable processing time and memory for file management and 3D rendering. In the present study, we proposed an algorithm named "Kaleido" that can visualize up to at least ten thousand single neurons from the Drosophila brain using only a fraction of the memory traditionally required, without increasing computing time. Adding more brain neurons increases memory only nominally. Importantly, Kaleido maximizes color contrast between neighboring neurons so that individual neurons can be easily distinguished. Colors can also be assigned to neurons based on biological relevance, such as gene expression, neurotransmitters, and/or development history. For cross-lab examination, the identity of every neuron is retrievable from the displayed image. To demonstrate the effectiveness and tractability of the method, we applied Kaleido to visualize the 10,000 Drosophila brain neurons obtained from the FlyCircuit database Thus, Kaleido visualization requires only sensible computer memory for manual examination of big connectomics data.
經理人過度自信與審計能力對自結盈餘資訊揭露決策的影響
(國立交通大學, 2018-04-01)
張森河
;
黃劭彥
;
王登仕
;
康照宗
;
Shen-Ho Chang
本研究主要從經理人過度自信與審計能力角度檢視自結盈餘資訊揭露決定因素，以及其對揭露偏誤的影響。本研究應用Two Part Model發現經理人過度自信或是選用具有審計能力的審計產業專家會比較願意揭露自結盈餘。另外，在揭露頻率決策上，本研究僅發現在審計能力上，公司若選用具有審計能力的審計產業專家會有比較高的揭露頻率。更進一步，本研究也檢視經理人過度自信與審計能力對自結盈餘與公告盈餘偏誤的影響，本研究發現總經理持股比率增加的過度自信會有較低的自結盈餘與公告盈餘偏誤；然而，審計任期愈長反而提高自結盈餘與公告盈餘偏誤。最後，檢視經理人與事務所之間的協議能力，本研究發現在審計任期較短的情況下，經理人協議能力會優於事務所。