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Search Results: 1 - 10 of 5894 matches for " Te-King Chien "
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Using a Satisfaction Decision Model to Enhance e-Learning Performance: A Case Study
Te-King Chien
International Journal of Electronic Business Management , 2005,
Abstract: Although many enterprises expect to enhance the performance of their e-Learning systems by increasing employees’ learning satisfaction, they are not able to make the right decisions due to the lack of a systematic analysis methodology. It is in such a circumstance that the author submits the “Satisfaction Decision Model” in this paper. The Model consists of twelve implementation steps and three decision tools. The first tool, “Learning Satisfaction Categories and Items” is obtained by reviewing relevant literature and the Delphi Method. The second tool is the “Satisfaction Decision Diagram”, integrating the concepts of Kano’s model, QFD and related decision models develop the two coordinate axes. The third tool, “Decision Principles”, is based on the concepts of “Theory of constraints” and Kano's model. In order to demonstrate the model’s practicality, the author worked with 4 well-known companies at the Hsinchu Science-based Industrial Park in Taiwan and achieved satisfactory results. Results that cannot only be provided for enterprises' reference, but also effectively demonstrate the model’s feasibility. Guided by the model, company executives can quickly and correctly sort out the improvement issues of their E-Learning systems and maximize benefits for the company resources.
A Planning Map of Advanced EIP System
Te-king Chien,Chun-Hsien Chen
International Journal of Electronic Business Management , 2007,
Abstract: Enterprise Information Portal (EIP) is not only the face and symbol of an enterprise but also an important point of contact for provider and users. EIP have become an essential aspect of an enterprise’s E-development. However most of the portals of enterprises, still merely display the company’s history, its visions and mission statement, its core activities, product information, contact details etc. This not only fails to provide quick response to the demands of users and provider but also fails to consider the employees’ needs of learning and efficient communication links within the organization. In addition to the lack of sufficient expertise and experience, the core reason for the problems mentioned above is lack of a complete EIP system planning map. In order to address such inadequacies, this research attempts to arrange major dimensions and items of EIP system, through analyzing relevant documentation, referring to British Standards 15000 and utilizing of Plan, Do, Check, Action management cycle, Furthermore, a number of local IT specialists are interviewed and statistics Frequency Analysis used to establish the importance of each item; the Fuzzy Delphi Method is used to examine the framework and causal relation and ensure the stability of the establishment process; also with some toolkit such as Focus Group Interview to verify the responsibilities of each items. Finally, the result of these activities is the proposed EIP system planning map. To verify and confirm the findings of this research, four enterprises are invited to participate in an experiment. The results are as follow. The organisation that used an EIP system based on the map suggested by this research had the highest level of satisfaction. It was followed by the enterprise that only selected the main items. Further down was the enterprise that considered the map as a major reference foundation. At the bottom was the one that did not incorporate the findings and proceeded in accordance with the ideas of the senior management. Therefore the importance of the EIP system planning map, suggested by this research, in the developing of an EIP had been established.
The Successful Development Strategy for E-Shops from the Perspectives of Value
Te-King Chien,Mei-Fang Wang
International Journal of Electronic Business Management , 2006,
Abstract: Under fast development of the Internet, e-Shops have become an important marketing channel. Despite the growth of Internet surfers, the population with experiences of shopping online has not grown to a significant level. In addition to the incomplete online shopping environment and security issues, the insufficient understanding of most enterprises about how to manage an e-Shop is also the main reason. To provide a seasonable solution to this issue, this study would (1) derive 4 constructs, 16 categories, and 68 key success factors via literature reviews, expert interviews, Focus Group, and Delphi method; (2) establish an operation value system of e-Shops as the basis of assessing the difference in key success factors; (3) integrate the value system and the concept of Kano model to develop Kano-value model, so as to get hold of the properties and category of each key factor; (4) apply FAHP (Fuzzy Analytic Hierarchy Process) to present the importance ranking of the 4 constructs and 16 categories as the basis for the staged development of enterprises; and finally (5) according to the ranking, establish the successful development strategy for e-Shops. It was expected that the research results would serve as a reference for more accurate systemization of e-Shops in the process of development and reduce the exploration time and possibility of failure in the process of test and trial.
Relationship between Kt/V urea-based dialysis adequacy and nutritional status and their effect on the components of the quality of life in incident peritoneal dialysis patients
Jin-Bor Chen, Yu-Jen Su, Wen-Chin Lee, Ben-Chung Cheng, Chien-Chun Kuo, Chien-Hsing Wu, Eton Lin, Yi-Chun Wang, Te-Chuan Chen, Shang-Chih Liao, King-Kwan Lam
BMC Nephrology , 2012, DOI: 10.1186/1471-2369-13-39
Abstract: It was a prospective 6-month observational study. Eighty incident PD participants who were treated in a hospital-based PD center were enrolled. The period of enrollment was January 2009–June 2010; follow-up continued until December 2010. PD adequacy indices, including Kt/V urea, weekly Ccr (WCcr), measures of nutritional status (albumin, BMI), and nPCR were measured at 1 month and 6 months after PD initiation. SF-36 health survey questionnaires were used to measure the quality of life. The outcomes were used to measure the changes in the domains of the SF-36 after 6 months of PD therapy.Seventy-seven incident patients who underwent PD for 6 months were included in the study. The mean age was 47.3 years, and the male-to-female ratio was 38:39. A peritoneal Kt/V urea value of 1.2, which was also the baseline cutoff value, was found to have the highest influence on SF-36 domains. Patients with baseline peritoneal Kt/V urea value of <1.2 showed improvement in the physical functioning and role limitation of physical functioning components after 6 months of PD. In contrast, patients with baseline peritoneal Kt/V urea values of ≥1.2 showed remarkable improvement in the general health, physical functioning, role limitation caused by physical problems, and bodily pain components. However, the trend of improvement decreased in patients with baseline nPCR of <1.2. Baseline renal WCcr did not influence the improvement in the SF-36 domains.A small cohort and a short observation period.The baseline level of peritoneal Kt/V urea affected the components of the quality of life after PD initiation. In contrast, a lower baseline nPCR level was associated with deterioration in the quality of life after PD therapy.
Energy Efficient Bootstrapped CMOS Large RC-Load Driver Circuit for Ultra Low-Voltage VLSI
Chien-Yu Lu,Ching-Te Chuang
Journal of Low Power Electronics and Applications , 2012, DOI: 10.3390/jlpea2040282
Abstract: This paper presents an energy efficient bootstrapped CMOS driver to enhance the switching speed for driving large RC load for ultra-low-voltage CMOS VLSI. The proposed bootstrapped driver eliminates the leakage paths in the conventional bootstrapped driver to achieve and maintain more positive and negative boosted voltage levels of the boosted nodes, thus improving boosting efficiency and enhancing driver switching speed. Measured performance from test chips implemented with UMC 65?nm low-power CMOS technology (VTN ≈ VTP ≈ 0.5 V) indicates that the proposed driver provides a rising-delay improvement of 37%–50% and a falling-delay improvement of 25%–47% at 0.3?V for a loading ranging from a 0 to 24 mm long M6 metal line compared with the conventional bootstrapped driver. Although designed and optimized for subthreshold ultra low-voltage operation, the proposed bootstrapped driver is shown to be advantageous at higher nearly-threshold supply voltage as well. The proposed driver provides a rising delay improvement of 20% to 52% and a falling delay improvement of 23%–43% for VDD ranging from 0.3?V to 0.5?V, while consuming about 15% less average power than the conventional bootstrapped driver driving a 16?mm long M6 wire.
Associations between Brain-derived Neurotrophic Factor G196A Gene Polymorphism and Clinical Phenotypes in Schizophrenia Patients
Tiao-Lai Huang,Chien-Te Lee
Chang Gung Medical Journal , 2007,
Abstract: Background: Brain-derived neurotrophic factor (BDNF) had been chosen as a candidategene for schizophrenia. This study investigated the relationships betweenBDNF G196A gene polymorphism and clinical phenotypes in schizophreniapatients in the Taiwanese population.Methods: During a one year period, 132 schizophrenic patients and 103 healthy controlswere recruited. Psychiatric diagnoses were made according to DSM-IVcriteria. Genotyping of the G196A polymorphism of BDNF was performedby polymerase chain reaction amplification and restriction fragment lengthpolymorphism.Results: The data showed that the BDNF G196A genotypes and their allele distributionsdid not differ between patients with schizophrenia and healthy controls.No significant differences were noted in the BDNF G196A genotypes andallele distribution between schizophrenia patients with and without a familytendency for schizophrenia or between those with an age of onset before orafter 25 years old. However, there was a significant difference in BDNFG196A genotype distribution between schizophrenia patients with and withouta suicide history.Conclusions: These analytical results suggest that BDNF G196A gene polymorphism isassociated with a susceptibility to a suicide history in schizophrenia patientsin the Taiwanese population. Further study with a larger number of samplesis needed to prove these findings.
Reentrant superconductivity in conical-ferromagnet/superconductor nanostructures
Chien-Te Wu,Oriol T. Valls,Klaus Halterman
Physics , 2011, DOI: 10.1103/PhysRevLett.108.117005
Abstract: We study a bilayer consisting of an ordinary superconductor and a magnet with a spiral magnetic structure of the {\rm Ho} type. We use a self consistent solution of the Bogolioubov-de Gennes equations to evaluate the pair amplitude, the transition temperature, and the thermodynamic functions, namely, the free energy and entropy. We find that for a range of thicknesses of the magnetic layer the superconductivity is reentrant with {\it temperature} $T$: as one lowers $T$ the system turns superconducting, and when $T$ is further lowered it turns normal again. This behavior is reflected in the condensation free energy and the pair potential, which vanish both above the upper transition and below the lower one. The transition is strictly reentrant: the low and high temperature phases are the same. The entropy further reveals a range of temperatures where the superconducting state is {\it less ordered} than the normal one.
Charge and Spin Currents in Ferromagnetic Josephson junctions
Klaus Halterman,Oriol T. Valls,Chien-Te Wu
Physics , 2015, DOI: 10.1103/PhysRevB.92.174516
Abstract: We determine, using a self consistent method, the charge and spin currents in ballistic Josephson junctions consisting of ferromagnetic ($F$) layers sandwiched between superconducting ($S$) electrodes ($SFS$-type junctions). When there are two $F$ layers, we also consider the experimentally relevant configuration where a normal ($N$) nonmagnetic spacer layer separates them. We study the current-phase relationships as functions of geometrical parameters that are accessible experimentally including the angles that characterize the relative orientation of the magnetization in the $F$ layers. Our self-consistent method ensures that the proper charge conservation laws are satisfied. As we vary the phase difference $\Delta\varphi$ between the two outer $S$ electrodes, multiple harmonics in the current phase relations emerge, their extent depends on the interface scattering strength and the relative $F$ layer widths and magnetization orientations. By manipulating the relative $F$ layer magnetization orientations, we find that the charge supercurrent can reverse directions or vanish altogether. These findings are discussed in the context of the generation and long-range nature of triplet pair correlation. We also investigate the spin currents and associated spin transfer torques throughout the junction. For noncollinear relative magnetizations, the non-conserved spin currents in a given $F$ region gives rise to net torques that can switch directions at particular magnetic configurations or $\Delta\varphi$ values. The details of the spin current behavior are shown to depend strongly on the degree of magnetic inhomogeneity in the system.
Tunneling Conductance and Spin Transport in Clean Ferromagnet-Ferromagnet-Superconductor Heterostructures
Chien-Te Wu,Oriol T. Valls,Klaus Halterman
Physics , 2014, DOI: 10.1103/PhysRevB.90.054523
Abstract: We present a transfer matrix approach that combines the Blonder-Tinkham-Klapwijk (BTK) formalism and self-consistent solutions to the Bogolibuov-de Gennes (BdG) equations and use it to study the tunneling conductance and spin transport in ferromagnet (${\rm F}$)-superconductor (${\rm S}$) trilayers (${\rm F_1F_2 S}$) as functions of bias voltage. The self-consistency ensures that the spin and charge conservation laws are properly satisfied. We consider forward and angularly averaged conductances over a broad range of the strength of the exchange fields and ${\rm F}$ thicknesses, as the relative in-plane magnetization angle, $\phi$, between the two ferromagnets varies. The $\phi$-dependence of the self-consistent conductance curves in the trilayers can differ substantially from that obtained via a non-self-consistent approach. The zero bias forward conductance peak exhibits, as $\phi$ varies, resonance effects intricately associated with particular combinations of the geometrical and material parameters. We find, when the magnetizations are non-collinear, signatures of the anomalous Andreev reflections in the subgap regions of the angularly averaged conductances. When ${\rm F_1}$ is half-metallic, the angularly averaged subgap conductance chiefly arises from anomalous Andreev reflection. The in-plane components of the spin current are strongly bias dependent, while the out-of-plane spin current component is only weakly dependent upon voltage. The components of the spin current aligned with the local exchange field of one of the F layers are conserved in that layer and in the S region, while they oscillate in the other layer. We compute the spin transfer torques, in connection with the oscillatory behavior of spin currents, and verify that the spin continuity equation is strictly obeyed in our method.
Exact correlation functions in the cuprate pseudogap phase: combined effects of charge order and pairing
Rufus Boyack,Chien-Te Wu,Peter Scherpelz,K. Levin
Physics , 2014, DOI: 10.1103/PhysRevB.90.220513
Abstract: There is a multiplicity of charge ordered, pairing-based or pair density wave theories of the cuprate pseudogap, albeit arising from different microscopic mechanisms. For mean field schemes (of which there are many) we demonstrate here that they have precise implications for two body physics in the same way that they are able to address the one body physics of photoemission spectroscopy. This follows because the full vertex can be obtained exactly from the Ward-Takahashi identity. As an illustration, we present the spin response functions, finding that a recently proposed pair density wave (Amperean pairing) scheme is readily distinguishable from other related scenarios.
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