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Search Results: 1 - 10 of 99326 matches for " Yi-Jhe Chen "
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Inequalities on several quasi-arithmetic means
Shuoh-Jung Liu,Gou-Sheng Yang,Yi-Jhe Chen
Tamkang Journal of Mathematics , 2012, DOI: 10.5556/j.tkjm.43.2012.259-266
Abstract: Inequalities on several quasi-arithmetic means are established by using convexity and concavity.
Automated Feature Set Selection and Its Application to MCC Identification in Digital Mammograms for Breast Cancer Detection
Yi-Jhe Huang,Ding-Yuan Chan,Da-Chuan Cheng,Yung-Jen Ho,Po-Pang Tsai,Wu-Chung Shen,Rui-Fen Chen
Sensors , 2013, DOI: 10.3390/s130404855
Abstract: We propose a fully automated algorithm that is able to select a discriminative feature set from a training database via sequential forward selection (SFS), sequential backward selection (SBS), and F-score methods. We applied this scheme to microcalcifications cluster (MCC) detection in digital mammograms for early breast cancer detection. The system was able to select features fully automatically, regardless of the input training mammograms used. We tested the proposed scheme using a database of 111 clinical mammograms containing 1,050 microcalcifications (MCs). The accuracy of the system was examined via a free response receiver operating characteristic (fROC) curve of the test dataset. The system performance for MC identifications was Az = 0.9897, the sensitivity was 92%, and 0.65 false positives (FPs) were generated per image for MCC detection.
Phylogenetic and Molecular Characterization of the Splicing Factor RBM4
Chia-Chen Lu, Tz-Hao Chen, Jhe-Rong Wu, Hung-Hsi Chen, Hsin-Yi Yu, Woan-Yuh Tarn
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0059092
Abstract: The mammalian multi-functional RNA-binding motif 4 (RBM4) protein regulates alterative splicing of precursor mRNAs and thereby affects pancreas and muscle cell differentiation. RBM4 homologs exist in all metazoan lineages. The C-terminal unstructured domain of RBM4 is evolutionarily divergent and contains stretches of low-complexity sequences, including single amino acid and/or dipeptide repeats. Here we examined the splicing activity, phosphorylation potential, and subcellular localization of RBM4 homologs from a wide range of species. The results show that these RBM4 homologs exert different effects on 5′ splice site utilization and exon selection, and exhibit different subnuclear localization patterns. Therefore, the C-terminal domain of RBM4 may contribute to functional divergence between homologs. On the other hand, analysis of chimeric human RBM4 proteins containing heterologous sequences at the C-terminus revealed that the N-terminal RNA binding domain of RBM4 could have a dominant role in determining splicing outcome. Finally, all RBM4 homologs examined could be phosphorylated by an SR protein kinase, suggesting that they are regulated by a conserved mechanism in different species. This study offers a first clue to functional evolution of a splicing factor.
Germ Cell Development in the Scleractinian Coral Euphyllia ancora (Cnidaria, Anthozoa)
Shinya Shikina, Chieh-Jhen Chen, Jhe-Yu Liou, Zi-Fan Shao, Yi-Jou Chung, Yan-Horn Lee, Ching-Fong Chang
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0041569
Abstract: Sexual reproduction of scleractinian coral is among the most important means of establishing coral populations. However, thus far, little is known about the mechanisms underlying coral gametogenesis. To better understand coral germ cell development, we performed a histological analysis of gametogenesis in Euphyllia ancora and characterized the coral homolog of the Drosophila germline marker gene vasa. The histological analysis revealed that E. ancora gametogenesis occurs in the mesenterial mesoglea between the mesenterial filaments and the retractor muscle bands. The development of germ cells takes approximately one year in females and half a year in males. Staining of tissue sections with an antibody against E. ancora Vasa (Eavas) revealed anti-Eavas immunoreactivity in the oogonia, early oocyte, and developing oocyte, but only faint or undetectable reactivity in developing oocytes that were >150 μm in diameters. In males, Eavas could be detected in the spermatogonia and primary spermatocytes but was only faintly detectable in the secondary spermatocytes, spermatids, and sperms. Furthermore, a reverse transcription-polymerase chain reaction analysis and Western blotting analysis of unfertilized mature eggs proved the presence of Eavas transcripts and proteins, suggesting that Eavas may be a maternal factor. Vasa may represent a germ cell marker for corals, and would allow us to distinguish germ cells from somatic cells in coral bodies that have no distinct organs.
Template Matching using Statistical Model and Parametric Template for Multi-Template  [PDF]
Chin-Sheng Chen, Jian-Jhe Huang, Chien-Liang Huang
Journal of Signal and Information Processing (JSIP) , 2013, DOI: 10.4236/jsip.2013.43B009
Abstract:

This paper represents a template matching using statistical model and parametric template for multi-template. This algorithm consists of two phases: training and matching phases. In the training phase, the statistical model created by principal component analysis method (PCA) can be used to synthesize multi-template. The advantage of PCA is to reduce the variances of multi-template. In the matching phase, the normalized cross correlation (NCC) is employed to find the candidates in inspection images. The relationship between image block and multi-template is built to use parametric template method. Results show that the proposed method is more efficient than the conventional template matching and parametric template. Furthermore, the proposed method is more robust than conventional template method.

Efficiency Improved by Forming Gas Treatment for Si-Based Solar Cell Applications
Yuang-Tung Cheng,Jyh-Jier Ho,William Lee,Song-Yeu Tsai,Liang-Yi Chen,Jia-Jhe Liou,Shun-Hsyung Chang,Huajun Shen,Kang L. Wang
International Journal of Photoenergy , 2010, DOI: 10.1155/2010/634162
Abstract: The photovoltaic (PV) effects have been investigated and improved using efficient treatments both on single-crystalline (sc) and on multicrystalline (mc) silicon (Si) solar cells. The major effect of forming gas (FG) treatment on solar cell performance is the fill-factor values, which increase 3.75% and 8.28%, respectively, on sc-Si and mc-Si solar cells. As for the optimal 15%- ratio and 40-minute FG treatment, the conversion efficiency ( ) values drastically increase to 14.89% and 14.31%, respectively, for sc- and mc-Si solar cells. Moreover, we can measure the internal quantum efficiency (IQE) values increase with -FG treatment under visible wavelength (400~900?nm) radiation. Thus based on the work in this research, we confirm that passivation has become crucial both in PV as well as in microelectronics fields. Moreover, the developed mc-Si solar cell by proper FG treatment is quite suitable for commercial applications. 1. Introduction Due to high price of fossil energy source and huge pollution of environmental issue in recent years, the development of renewable energy regains our attention. The development of the solar energy industry is one of the most popular technologies in renewable energy. For the solar energy becoming a practical renewable energy, it is widely accepted that we must have efficient ways to convert radiation into electricity as called photovoltaic (PV) effect. Nowadays, however, the unit price of converting power by solar energy is much higher than that of the traditional energy source. Thus, how to enhance the overall efficiency and reduce the manufacturing cost is an important subject for developing the solar energy industry [1, 2]. The crystalline silicon-based (Si-based) solar cell is not only still heavily dependent on the materials base of the semiconductor industry but also features an excellent stability, technology maturity, and an easy acquisition. It also fulfils these requirements for the rapidly expanding solar energy market [3, 4]. For a Si crystalline growth, if any grain boundary exists inside the crystal, the dangling bond will be formed by the breaking interface in a Si atom. In any pn-junction of the solar-cell process, meanwhile, the emitting electrons inside the crystalline Si are highly active and easily combined with other elements [5, 6]. For the dangling bond in the band gap, the excess of positively charged states in dangling bond gives rise to energy level deep, thus enhancing n types Si crystalline by irradiating the material, or by extrinsic doping. It is well known that cost reductions of the
Single port laparoscopic right hemicolectomy for ileocolic intussusception
Jia-Hui Chen,Jhe-Syun Wu
World Journal of Gastroenterology , 2013, DOI: 10.3748/wjg.v19.i9.1489
Abstract: A 36-year-old male was admitted with right lower abdominal pain and diarrhea for more than 3 mo. Colonoscopy and a barium enema study revealed a submucosal tumor over the cecum, but computed tomography showed an ileal lipoma. There was no definitive diagnosis preoperatively, but ileocolic intussusception was noted during surgery. Single port laparoscopic radical right hemicolectomy was performed because intra-operative reduction failed. The histological diagnosis of the resected tumor was lipoma. Single port laparoscopic surgery has recently been proven to be safe and feasible. There are advantages compared with conventional laparoscopic surgery, such as smaller incision wounds, fewer port site complications, and easier conversion. However, there are some drawbacks which need to be overcome, such as difficulties in triangulation and instrument clashing. If there are no contraindications to laparoscopy, single port laparoscopic surgery can be performed safely and should be considered for diagnosis and treatment of intussusception in adults. Here, we report the first case of ileocolic intussusception successfully treated by single port laparoscopic surgery.
Skyhook Surface Sliding Mode Control on Semi-Active Vehicle Suspension System for Ride Comfort Enhancement  [PDF]
Yi Chen
Engineering (ENG) , 2009, DOI: 10.4236/eng.2009.11004
Abstract: A skyhook surface sliding mode control method was proposed and applied to the control on the semi-active vehicle suspension system for its ride comfort enhancement. A two degree of freedom dynamic model of a vehicle semi-active suspension system was given, which focused on the passenger’s ride comfort perform-ance. A simulation with the given initial conditions has been devised in MATLAB/SIMULINK. The simula-tion results were showing that there was an enhanced level of ride comfort for the vehicle semi-active sus-pension system with the skyhook surface sliding mode controller.
Ongoing Blood Pressure Change in Both Upper Extremities: An Unusual Presentation of Aortic Dissection  [PDF]
Hung Yi Chen
International Journal of Clinical Medicine (IJCM) , 2011, DOI: 10.4236/ijcm.2011.24078
Abstract: Aortic dissection is a critical condition requiring immediate assessment and management. Patients with this condition usually present with severe chest pain and high blood pressure. However, because of the variety of presenting symptoms and features, it is a challenge to identify this condition, and patients are frequently misdiagnosed. The potentially critical course of aortic dissection can result in tragedy. We present the case of a 46-year-old woman who initially presented with a light headache and sensory loss in her right upper limb. She had a medical history of hypertension without regular medication, and her blood pressure (BP) was 110/67 mmHg on arrival. Four days later, she was sent to the emergency department again because she experienced transient loss of consciousness lasting for a few minutes. Her BP was 94/57 mmHg in the right arm and 89/54 in the left arm. She was admitted to the hospital, and the pulses in both upper limbs were impalpable on the following day. Chest magnetic resonance imaging (MRI) was arranged, and subsequently, aortic dissection was diagnosed. The case presented with unusual characteristics, which increased the difficulty in immediate correct diagnosis.
Preliminary Report of PGR’s Influence to Multiple Shoots Induction and Plant Regeneration on Plumbago auriculata  [PDF]
Yi Chen, Suping Gao
American Journal of Plant Sciences (AJPS) , 2013, DOI: 10.4236/ajps.2013.45A004
Abstract:

With the explants of young nodals and leaves of Plumbago auriculata, we studied multiple shoots induction and plant regeneration in the medium with different PGR proportions. The results showed the nodals of Plumbago auriculata could be used as the explant to induce multiple shoots. After culturing young nodals for 30 d, optimum single shoot formation was achieved on MS medium supplemented with 0.3 mg/L 6-BA and the induction rate was 70.79%. After being transferred to the medium containing 1.0 mg/L 6-BA, 1.0 mg/L NAA and 0.2 mg/L IAA for 1 - 2 generation, single shoot was induced to form multiple shoots with the multiplication rate was 506.45%. After multiple shoots grew to 3 cm high, the multiple shoots were cut into single shoots and transferred onto half-strength MS medium supplemented with 0.5 mg/L NAA and the rooted rate was 94.33%. Finally the intact plants were obtained.

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