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Search Results: 1 - 10 of 53290 matches for " Chia-Cheng Hu "
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Power-Aware DVB-H Mobile TV System on Heterogeneous Multicore Platform
Lu Yu-Sheng,Lai Chin-Feng,Hu Chia-Cheng,Chao Han-Chieh
EURASIP Journal on Wireless Communications and Networking , 2010,
Abstract: In mobile communication network, the mobile device integrated with TV player is a novel technology that provides TV program services to end users. As TV program is a real-time video service, it has greater technical difficulties to overcome than a traditional video file download or online streaming, especially when TV programs are played on handheld devices. A challenge is how to save power in order to provide users with longer TV program services. To address this issue, this study proposes a mobile TV system on a heterogeneous multicore platform, which utilizes a Digital Video Broadcasting-Handheld (DVB-H) wireless network to receive the TV program signal, thus, saving power according to the features of DVB-H TV signal and heterogeneous multi-core.
Power-Aware DVB-H Mobile TV System on Heterogeneous Multicore Platform
Yu-Sheng Lu,Chin-Feng Lai,Chia-Cheng Hu,Han-Chieh Chao
EURASIP Journal on Wireless Communications and Networking , 2010, DOI: 10.1155/2010/812356
Abstract: In mobile communication network, the mobile device integrated with TV player is a novel technology that provides TV program services to end users. As TV program is a real-time video service, it has greater technical difficulties to overcome than a traditional video file download or online streaming, especially when TV programs are played on handheld devices. A challenge is how to save power in order to provide users with longer TV program services. To address this issue, this study proposes a mobile TV system on a heterogeneous multicore platform, which utilizes a Digital Video Broadcasting-Handheld (DVB-H) wireless network to receive the TV program signal, thus, saving power according to the features of DVB-H TV signal and heterogeneous multi-core.
Recent translational research: stem cells as the roots of breast cancer
Chia-Cheng Chang
Breast Cancer Research , 2005, DOI: 10.1186/bcr1385
Abstract: As summarized by Hanahan and Weinberg [1], cancer cells possess several characteristics that may be considered hallmarks of cancer. However, some major characteristics of cancer cells were not included in that list, namely common phenotypes of cancer and stem cells such as deficiency in gap junctional intercellular communication (GJIC) [2] and expression of genes that are involved in stem cell specific function and self-renewal (e.g. Oct-4 [3] and other pathways [4]). These common phenotypes suggest that cancers arose from stem cells.In human breast cancer, two lines of observations have been cited as evidence in favor of the stem cell theory of carcinogenesis. First, pregnancy may reduce the risk of breast cancer possibly by inducing the differentiation of mammary gland and reducing the number of breast stem cells [5]. Second, in a Japanese study of the effects of atomic bomb detonation [6], evaluation of the radiation effect revealed that young women were more susceptible to radiation-induced breast cancer. Breast epithelial cells with stem cell features have been isolated [7,8]. Characterization of these cells provides more direct evidence for the stem cell hypothesis of breast tumorigenesis. Recently, several different human cancers, including breast cancer, were shown to contain tumor-initiating stem cells [9-11]. These cells are believed to sustain breast tumor growth and to be targets for cancer treatment. However, the role of these cells in breast tumor progression and the prevalence of these cells in clinical outcome are not yet clear [12].Two types of normal human breast epithelial cells (HBECs) derived from reduction mammoplasty have been isolated and characterized [7]. Type I HBECs express estrogen receptor (ER)-α and luminal epithelial cell markers (i.e. epithelial membrane antigen and cytokeratin [CK]18). These cells also exhibit stem cell characteristics, including deficiency in GJIC [7], capacity for anchorage-independent growth (AIG) [13], ability t
Multi-Hop Routing Mechanism for Reliable Sensor Computing
Jiann-Liang Chen,Yi-Wei Ma,Chia-Ping Lai,Chia-Cheng Hu,Yueh-Min Huang
Sensors , 2009, DOI: 10.3390/s91210117
Abstract: Current research on routing in wireless sensor computing concentrates on increasing the service lifetime, enabling scalability for large number of sensors and supporting fault tolerance for battery exhaustion and broken nodes. A sensor node is naturally exposed to various sources of unreliable communication channels and node failures. Sensor nodes have many failure modes, and each failure degrades the network performance. This work develops a novel mechanism, called Reliable Routing Mechanism (RRM), based on a hybrid cluster-based routing protocol to specify the best reliable routing path for sensor computing. Table-driven intra-cluster routing and on-demand inter-cluster routing are combined by changing the relationship between clusters for sensor computing. Applying a reliable routing mechanism in sensor computing can improve routing reliability, maintain low packet loss, minimize management overhead and save energy consumption. Simulation results indicate that the reliability of the proposed RRM mechanism is around 25% higher than that of the Dynamic Source Routing (DSR) and Ad hoc On-demand Distance Vector routing (AODV) mechanisms.
Voltage Generated Characteristics of Piezoelectric Ceramics Cymbal Transducer  [PDF]
Long Wu, Ming-Cheng Chure, King-Kung Wu, Chia-Cheng Tung
Journal of Materials Science and Chemical Engineering (MSCE) , 2014, DOI: 10.4236/msce.2014.210005
Abstract:

In this study the relation between the generated open circuit output voltages of the piezoelectric ceramics Cymbal transducers with applied impact mechanical energy is studied. The output voltages of piezoelectric ceramics Cymbal transducers are increased with the increasing of the applied mechanical energy. Under the same impact mechanical energy, the generated open circuit output voltages of the piezoelectric ceramics Cymbal transducer is much higher than that of uncapped piezoelectric ceramics disk alone. The generated open circuit output voltages of the piezoelectric ceramics Cymbal transducer depend on the geometry parameters and the metal thickness of end-cap. The generated open circuit voltage of piezoelectric ceramics Cymbal transducer with thick metal thickness is small than that with thin metal thickness.

Discovery of Genes Related to Insecticide Resistance in Bactrocera dorsalis by Functional Genomic Analysis of a De Novo Assembled Transcriptome
Ju-Chun Hsu, Ting-Ying Chien, Chia-Cheng Hu, Mei-Ju May Chen, Wen-Jer Wu, Hai-Tung Feng, David S. Haymer, Chien-Yu Chen
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0040950
Abstract: Insecticide resistance has recently become a critical concern for control of many insect pest species. Genome sequencing and global quantization of gene expression through analysis of the transcriptome can provide useful information relevant to this challenging problem. The oriental fruit fly, Bactrocera dorsalis, is one of the world's most destructive agricultural pests, and recently it has been used as a target for studies of genetic mechanisms related to insecticide resistance. However, prior to this study, the molecular data available for this species was largely limited to genes identified through homology. To provide a broader pool of gene sequences of potential interest with regard to insecticide resistance, this study uses whole transcriptome analysis developed through de novo assembly of short reads generated by next-generation sequencing (NGS). The transcriptome of B. dorsalis was initially constructed using Illumina's Solexa sequencing technology. Qualified reads were assembled into contigs and potential splicing variants (isotigs). A total of 29,067 isotigs have putative homologues in the non-redundant (nr) protein database from NCBI, and 11,073 of these correspond to distinct D. melanogaster proteins in the RefSeq database. Approximately 5,546 isotigs contain coding sequences that are at least 80% complete and appear to represent B. dorsalis genes. We observed a strong correlation between the completeness of the assembled sequences and the expression intensity of the transcripts. The assembled sequences were also used to identify large numbers of genes potentially belonging to families related to insecticide resistance. A total of 90 P450-, 42 GST-and 37 COE-related genes, representing three major enzyme families involved in insecticide metabolism and resistance, were identified. In addition, 36 isotigs were discovered to contain target site sequences related to four classes of resistance genes. Identified sequence motifs were also analyzed to characterize putative polypeptide translational products and associate them with specific genes and protein functions.
GWAPower: a statistical power calculation software for genome-wide association studies with quantitative traits
Sheng Feng, Shengchu Wang, Chia-Cheng Chen, Lan Lan
BMC Genetics , 2011, DOI: 10.1186/1471-2156-12-12
Abstract: This paper presents GWAPower, a statistical software package of power calculation designed for GWA studies with quantitative traits, where genetic effect is defined as heritability. Based on several popular one-degree-of-freedom genetic models, this method avoids the need to specify the non-centrality parameter of the F-distribution under the alternative hypothesis. Therefore, it can use heritability information directly without approximation. In GWAPower, the power calculation can be easily adjusted for adding covariates and linkage disequilibrium information. An example is provided to illustrate GWAPower, followed by discussions.GWAPower is a user-friendly free software package for calculating statistical power based on heritability in GWA studies with quantitative traits. The software is freely available at: http://dl.dropbox.com/u/10502931/GWAPower.zip webciteStatistical power and sample size calculation is an important step during experiment design in genome-wide association (GWA) studies. It estimates the probability that a true genetic effect can be detected under the experimental constraints and other reasonable assumptions. To date, more than 230 GWA studies have been conducted and reported. Among these, case control design (>100 studies) and cohort studies with unrelated subjects (>70 studies) are the two most popular designs. In the majority of cohort studies, one or more phenotypic variables are quantitative traits. A number of statistical power calculation softwares have been developed for case-control GWA studies [1-5]. This report presents a simple and user-friendly statistical software, GWAPower, for power calculation of GWA studies with quantitative traits.General statistical power calculation procedures for quantitative measures often assume normality and require information of the first two distribution moments (means and variances) of the quantitative measure. These power calculation procedures cannot be applied directly in genetic studies. One c
ON THE GENERALIZED SLOPE-DEFLECTION EQUATIONS
角变位移方程的研究

PAN CHIA-CHENG,
潘家铮

物理学报 , 1955,
Abstract: This paper investigates the general and complete form of slope-deflection equations used in structural analysis. The word "complete" indicates that all the possible deformations (deflections and rotations) and all the strain energies (due to shear, direct stress and flexure) are included in the equations. The definitions, numbers, and relations of member constants are then discussed and the general equations for computing these constants are given. By neglecting the factors of minor importance, the general form is reduced to the usual slope-deflection equations. Some special forms of such equations which are useful in certain practical problems are also discussed briefly, such as the slope-deflection equations including the effect of direct stress on flexure and the slope-deflection equations of semi-rigid frames. Slope deflection equations for trussed bents are also presented.
Adaptive Array Beamforming Using Signal Cyclostationarity and Finite Data
Chia-Cheng Huang;Ju-Hong Lee
PIER C , 2011, DOI: 10.2528/PIERC11041701
Abstract: This paper considers adaptive array beamforming using signal cyclostationarity. Due to the effect of using finite data samples, there exists an estimation error in computing the weight vector required by performing cyclic beamforming. To deal with this problem, we formulate a cost function consisting of a posteriori information of the received signal and a priori information regarding the probabilistic distribution of the error. By minimizing the cost function, we obtain a weight vector with a diagonal loading data covariance matrix under a white Gaussian estimation error. An analytical solution for determining the loading factor is further derived. Simulation results for showing the effectiveness of the proposed method are provided.
Robust Adaptive Beamforming Using a Fully Data-Dependent Loading Technique
Chia-Cheng Huang;Ju-Hong Lee
PIER B , 2012, DOI: 10.2528/PIERB11110406
Abstract: This paper deals with adaptive array beamforming in the presence of errors due to steering vector mismatch and finite sample effect. Diagonal loading (DL) is one of the widely used techniques for dealing with these errors. However, the main drawback of DL techniques is that there is not an easy and reliable manner to determine the required loading factor. Recently, serval DL approaches proposed the so-called automatic scheme on computing the required loading factor. In this paper, we propose a fully data-dependent loading to overcome the difficulties. The novelty is that the proposed method does not require any additional sophisticated scheme to choose the required loading. The loading factor can be completely obtained from the received array data. Analytical formulas for evaluating the performance of the proposed method under random steering vector error are further derived. Simulation results are provided to confirm the validity of the proposed method and make comparison with the existing DL methods.
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