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Search Results: 1 - 10 of 30749 matches for " Ming-Che Shih "
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Comment on "Theory of diluted magnetic semiconductor ferromagnetism"
Min-Fong Yang,Shih-Jye Sun,Ming-Che Chang
Physics , 2000, DOI: 10.1103/PhysRevLett.86.5636
Abstract: In this comment, we emphasize that the self-consistent spin wave theory in a recent paper [J. K"onig, H.-H. Lin, and A. H. MacDonald, Phys. Rev. Lett. 84, 5628 (2000)] leads to incorrect results both at low temperatures and near T_c. Thus we suggest another self-consistent spin wave approximation to remedy these flaws.
The Model of Power and the Format of Content: On the Development of Personal Computers and “Step-by-Step” Content in Taiwan
Ming-Che Li
Journal of Library and Information Science Research , 2008,
Abstract: This paper paid more attention on the content of PC magazines using the format of "step-by-step" in Taiwan. With the help of "step-by-step", readers could not only acquire computer knowledge containing in the content, but also could practice skills to manage personal computers. When following Foucault's concept about "power and body", it means that in the situation of "practicing", the disciplines of PC power would be allowed to have free access to enter into the bodies of readers. Following the widespread of step-by-step, the universal access to the whole society would be available, therefore materializing the information society and shaping morals of computers.
The effect of in-plane magnetic field on the spin Hall effect in Rashba-Dresselhaus system
Ming-Che Chang
Physics , 2004, DOI: 10.1103/PhysRevB.71.085315
Abstract: In a two-dimensional electron gas with Rashba and Dresselhaus spin-orbit couplings, there are two spin-split energy surfaces connected with a degenerate point. Both the energy surfaces and the topology of the Fermi surfaces can be varied by an in-plane magnetic field. We find that, if the chemical potential falls between the bottom of the upper band and the degenerate point, then simply by changing the direction of the magnetic field, the magnitude of the spin Hall conductivity can be varied by about 100 percent. Once the chemical potential is above the degenerate point, the spin Hall conductivity becomes the constant $e/8\pi$, independent of the magnitude and direction of the magnetic field. In addition, we find that the in-plane magnetic field exerts no influence on the charge Hall conductivity.
Insights into Hypoxic Systemic Responses Based on Analyses of Transcriptional Regulation in Arabidopsis
Fu-Chiun Hsu, Mei-Yi Chou, Hsiao-Ping Peng, Shu-Jen Chou, Ming-Che Shih
PLOS ONE , 2011, DOI: 10.1371/journal.pone.0028888
Abstract: We have adopted a hypoxic treatment system in which only roots were under hypoxic conditions. Through analyzing global transcriptional changes in both shoots and roots, we found that systemic signals may be transduced from roots to trigger responses in tissues not directly subjected to hypoxia. The molecular mechanisms of such systemic responses under flooding are currently largely unknown. Using ontological categorization for regulated genes, a systemic managing program of carbohydrate metabolism was observed, providing an example of how systemic responses might facilitate the survival of plants under flooding. Moreover, a proportion of gene expressions that regulated in shoots by flooding was affected in an ethylene signaling mutation, ein2-5. Many systemic-responsive genes involved in the systemic carbohydrate managing program, hormone responses and metabolism, ubiquitin-dependent protein degradation were also affected in ein2-5. These results suggested an important role of ethylene in mediation of hypoxic systemic responses. Genes associated with abscisic acid (ABA) biosynthesis are upregulated in shoots and down regulated in roots. An ABA signaling mutation, abi4-1, affects expression of several systemic responsive genes. These results suggested that regulation of ABA biosynthesis could be required for systemic responses. The implications of these results for the systemic responses of root-flooded Arabidopsis are discussed.
Characterization of an Insecticidal Toxin and Pathogenicity of Pseudomonas taiwanensis against Insects
Wen-Jen Chen,Feng-Chia Hsieh,Fu-Chiun Hsu,Yi-Fang Tasy,Je-Ruei Liu ,Ming-Che Shih
PLOS Pathogens , 2014, DOI: doi/10.1371/journal.ppat.1004288
Abstract: Pseudomonas taiwanensis is a broad-host-range entomopathogenic bacterium that exhibits insecticidal activity toward agricultural pests Plutella xylostella, Spodoptera exigua, Spodoptera litura, Trichoplusia ni and Drosophila melanogaster. Oral infection with different concentrations (OD = 0.5 to 2) of wild-type P. taiwanensis resulted in insect mortality rates that were not significantly different (92.7%, 96.4% and 94.5%). The TccC protein, a component of the toxin complex (Tc), plays an essential role in the insecticidal activity of P. taiwanensis. The ΔtccC mutant strain of P. taiwanensis, which has a knockout mutation in the tccC gene, only induced 42.2% mortality in P. xylostella, even at a high bacterial dose (OD = 2.0). TccC protein was cleaved into two fragments, an N-terminal fragment containing an Rhs-like domain and a C-terminal fragment containing a Glt symporter domain and a TraT domain, which might contribute to antioxidative stress activity and defense against macrophagosis, respectively. Interestingly, the primary structure of the C-terminal region of TccC in P. taiwanensis is unique among pathogens. Membrane localization of the C-terminal fragment of TccC was proven by flow cytometry. Sonicated pellets of P. taiwanensis ΔtccC strain had lower toxicity against the Sf9 insect cell line and P. xylostella larvae than the wild type. We also found that infection of Sf9 and LD652Y-5d cell lines with P. taiwanensis induced apoptotic cell death. Further, natural oral infection by P. taiwanensis triggered expression of host programmed cell death-related genes JNK-2 and caspase-3.
Applying Prim’s Algorithm to Identify Isolated Areas for Natural Disaster Prevention and Protection  [PDF]
Wen-Ching Wang, Ming-Che Hsieh, Chun-Hsiang Huang
Engineering (ENG) , 2018, DOI: 10.4236/eng.2018.107029
Abstract: Based on the principle of “pre-disaster prevention outweighs rescue during disasters”, this study targets areas threatened by natural disasters, and develops an automatic algorithm based on the Prim algorithm to serve as an automatic identification system. In the face of natural disasters that disable key facilities in the region and prevent settlements from contacting the outside world or outsiders from sending rescuers to the settlements, the proposed system helps to identify whether these regions will become isolated areas and conduct disaster mitigation and relief resource allocation before any natural disaster in order to reduce potential disaster losses. An automatic identification system, based on the threshold of channel blocking due to broken roads and bridges, determines through the decision tree model and relevant patterns whether such regions will become isolated areas by identifying areas based on the results of model analysis. The proposed system’s identification results are verified by actual case histories and comparisons; the results can be used to correctly identify isolated areas. Finally, Microsoft Visual Studio C # and Google Map are employed to apply the results and to produce an information mode for the determination and decision support of isolated areas affected by natural disasters.
Complete Chloroplast Genome Sequence of an Orchid Model Plant Candidate: Erycina pusilla Apply in Tropical Oncidium Breeding
I-Chun Pan, Der-Chih Liao, Fu-Huei Wu, Henry Daniell, Nameirakpam Dolendro Singh, Chen Chang, Ming-Che Shih, Ming-Tsair Chan, Choun-Sea Lin
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0034738
Abstract: Oncidium is an important ornamental plant but the study of its functional genomics is difficult. Erycina pusilla is a fast-growing Oncidiinae species. Several characteristics including low chromosome number, small genome size, short growth period, and its ability to complete its life cycle in vitro make E. pusilla a good model candidate and parent for hybridization for orchids. Although genetic information remains limited, systematic molecular analysis of its chloroplast genome might provide useful genetic information. By combining bacterial artificial chromosome (BAC) clones and next-generation sequencing (NGS), the chloroplast (cp) genome of E. pusilla was sequenced accurately, efficiently and economically. The cp genome of E. pusilla shares 89 and 84% similarity with Oncidium Gower Ramsey and Phalanopsis aphrodite, respectively. Comparing these 3 cp genomes, 5 regions have been identified as showing diversity. Using PCR analysis of 19 species belonging to the Epidendroideae subfamily, a conserved deletion was found in the rps15-trnN region of the Cymbidieae tribe. Because commercial Oncidium varieties in Taiwan are limited, identification of potential parents using molecular breeding method has become very important. To demonstrate the relationship between taxonomic position and hybrid compatibility of E. pusilla, 4 DNA regions of 36 tropically adapted Oncidiinae varieties have been analyzed. The results indicated that trnF-ndhJ and trnH-psbA were suitable for phylogenetic analysis. E. pusilla proved to be phylogenetically closer to Rodriguezia and Tolumnia than Oncidium, despite its similar floral appearance to Oncidium. These results indicate the hybrid compatibility of E. pusilla, its cp genome providing important information for Oncidium breeding.
A Modified ABCDE Model of Flowering in Orchids Based on Gene Expression Profiling Studies?of the Moth Orchid?Phalaenopsis aphrodite
Chun-lin Su, Wan-Chieh Chen, Ann-Ying Lee, Chun-Yi Chen, Yao-Chien Alex Chang, Ya-Ting Chao, Ming-Che Shih
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0080462
Abstract: Previously we developed genomic resources for orchids, including transcriptomic analyses using next-generation sequencing techniques and construction of a web-based orchid genomic database. Here, we report a modified molecular model of flower development in the Orchidaceae based on functional analysis of gene expression profiles in Phalaenopsis aphrodite (a moth orchid) that revealed novel roles for the transcription factors involved in floral organ pattern formation. Phalaenopsis orchid floral organ-specific genes were identified by microarray analysis. Several critical transcription factors including AP3, PI, AP1 and AGL6, displayed distinct spatial distribution patterns. Phylogenetic analysis of orchid MADS box genes was conducted to infer the evolutionary relationship among floral organ-specific genes. The results suggest that gene duplication MADS box genes in orchid may have resulted in their gaining novel functions during evolution. Based on these analyses, a modified model of orchid flowering was proposed. Comparison of the expression profiles of flowers of a peloric mutant and wild-type Phalaenopsis orchid further identified genes associated with lip morphology and peloric effects. Large scale investigation of gene expression profiles revealed that homeotic genes from the ABCDE model of flower development classes A and B in the Phalaenopsis orchid have novel functions due to evolutionary diversification, and display differential expression patterns.
Weakly Nonlinear Hydrodynamic Stability of the Thin Newtonian Fluid Flowing on a Rotating Circular Disk
Cha'o-Kuang Chen,Ming-Che Lin
Mathematical Problems in Engineering , 2009, DOI: 10.1155/2009/948672
Abstract: The main object of this paper is to study the weakly nonlinear hydrodynamic stability of the thin Newtonian fluid flowing on a rotating circular disk. A long-wave perturbation method is used to derive the nonlinear evolution equation for the film flow. The linear behaviors of the spreading wave are investigated by normal mode approach, and its weakly nonlinear behaviors are explored by the method of multiple scales. The Ginzburg-Landau equation is determined to discuss the necessary condition for the existence of such flow pattern. The results indicate that the superctitical instability region increases, and the subcritical stability region decreases with the increase of the rotation number or the radius of circular disk. It is found that the rotation number and the radius of circular disk not only play the significant roles in destabilizing the flow in the linear stability analysis but also shrink the area of supercritical stability region at high Reynolds number in the weakly nonlinear stability analysis.
Amisulpride and Neuroleptic Malignant Syndrome
Ming-Che Tu,Cheng-Cheng Hsiao
Chang Gung Medical Journal , 2011,
Abstract: Neuroleptic malignant syndrome (NMS) is a rare but lethal complication of neuroleptics. Its incidence ranges between 0.02% and 3%. Amisulpride, a second generation neuroleptic, was associated with rhabdomyolysis in one report and NMS in 2 reports. Althoughthe precise pathogenesis is still unclear, dopamine receptor blockade is theorized to play acentral role. Conventional presentations include hyperthermia, muscle rigidity, and elevatedcreatine kinase concentrations. However, similar to other second generation neuroleptics,amisulpride induces an atypical form of NMS, which presents with lower degrees of hyperthermia and elevation of creatine kinase than the typical form. This phenomenon makes itdifficult to identify early signs of NMS. This study describes the first case of amisulprideinduced NMS in Taiwan, together with a review of the current knowledge on NMS. In thiscase, the correlation between NMS and amisulpride was categorized as “probable” on theNaranjo adverse drug reaction probability scale
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