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Search Results: 1 - 10 of 1386 matches for " Chengho Hsieh "
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Critical Re-Examinations on the Relationships among Capital Structure, Costs of Capital, and Firm Value  [PDF]
Chengho Hsieh, Tibor Szarvas
Journal of Mathematical Finance (JMF) , 2016, DOI: 10.4236/jmf.2016.65055
Abstract: We define debt ratio as the market value of a firm’s debt divided by the market value of the firm. In a perfect market with corporate taxes, given that the cost of debt is increasing and concave up and that the firm rebalances its debt, the cost of equity is an increasing and concave up function of the debt ratio if and only if the third derivative of the cost of debt is non-negative; otherwise, the cost of equity is increasing but its exact shape cannot be ascertained. In all cases, however, the cost of equity must be concave up initially. Also in this world, the weighted average cost of capital of the firm, WACC, is decreasing and concave down. In an imperfect market, the WACC may not have an absolute minimum between zero and 100 percent debt. Even if it does, the minimum may not occur at the debt ratio that maximizes firm value. The “pure-play” method to determine a new project’s discount rate is correct only if the opportunity cost of capital of the comparable firm remains constant with respect to the debt ratio or if the debt ratio of the comparable firm is equal to the target debt ratio of the firm evaluating the project. Strictly speaking, even if the two debt ratios are the same, the opportunity cost of capital of the comparable firm is not necessarily equal to that of the project unless the two costs of capital are identical functions of the debt ratio. Therefore, this method may not be valid.
Effects of Rotation on Turbulence Production  [PDF]
Alan S. Hsieh, Sedat Biringen
Journal of Applied Mathematics and Physics (JAMP) , 2019, DOI: 10.4236/jamp.2019.72024
Abstract: Direct numerical simulations (DNS) of non-rotating and rotating turbulent channel flow were conducted. The data base obtained from these DNS simulations was used to investigate the prominent coherent structures involved in the turbulence generation cycle. Predictions from three theoretical models concerning the formation and evolution of sublayer streaks, three-dimensional hairpin vortices and propagating plane waves were validated using visualizations from the present DNS data. Quadrant analysis was used to determine a phase shift between the fluctuating streamwise and wall-normal velocities as a characteristic of turbulence production in the suction region at a low rotation number.
Pseudo-Dirac Bino Dark Matter
Hsieh, Ken
High Energy Physics - Phenomenology , 2007, DOI: 10.1103/PhysRevD.77.015004
Abstract: While the bino-dominated lightest neutralino of the minimal supersymmetric Standard Model (MSSM) is an interesting and widely-studied candidate of the dark matter, the p-wave suppression of its annihilation cross section requires fine-tunings of the MSSM spectra to be consistent with WMAP observations. We propose pseudo-Dirac bino that arises in theories with D-type supersymmetry-breaking as an intriguing alternative candidate of dark matter. The pseudo-Dirac nature of the bino gives a natural mechanism of enhanced co-annihilation because these two states are degenerate in the absence of electroweak symmetry breaking. In addition, the lightest state can be consistent with limits of direct detection experiments because of the lack of vector interactions, as with the case of the MSSM bino.
L’Emprise du passé : crime, chatiment et culpabilité dans la création de Philippe Claudel L’emprise du passé : crime, chatiment et culpabilité dans la création de Philippe Claudel
Yvonne Hsieh
Voix Plurielles , 2010,
Abstract: Cette étude se propose de présenter quatre uvres de Philippe Claudel, romancier et réalisateur fran ais (né en 1962), en y analysant les thèmes obsessionnels du crime, du chatiment et de la culpabilité. Dans l’ensemble, une vision du monde très sombre se dégage de ses oeuvres, marquées par trois thèmes obsessionnels : crime, chatiment et culpabilité. Le monde imaginaire de Philippe Claudel est peuplé de trois sortes de personnes : des malfaiteurs (bandits, voleurs, violeurs, assassins, bourreaux), des victimes (enfants assassinés, femmes violées, boucs émissaires, suppliciés) et des ames grises (des victimes coupables, ou des coupables victimes). La plupart des personnages chez Claudel semblent receler un secret inavouable.
Décrire l’indescriptible : stratégies évasives dans Windows on the World de Frédéric Beigbeder
Yvonne Hsieh
Voix Plurielles , 2010,
Abstract: Le roman consiste en 120 petits chapitres, chacun portant en guise de titre une minute entre 8h30 et 10h29. Les chapitres identifiés par une minute impaire sont consacrés au récit du Texan Carthew Yorston et de ses deux fils Jerry et David qui se trouvent piégés avec d’autres victimes dans le restaurant Windows on the World en haut de la Tour Nord du World Trade Center, le matin des attaques. Dans les chapitres identifiés par une minute paire, nous suivons l’écriture du texte par Frédéric Beigbeder, d’abord à Paris, et ensuite à New York.
Roman picaresque, exotique et ethnographique : Le complexe de Di de Dai Sijie
Yvonne Hsieh
Voix Plurielles , 2010,
Abstract: En ce début du vingt et unième siècle, la scène littéraire fran aise voit la percée de quelques auteurs d’origine chinoise. Gao Xingjian re oit le prix Nobel en l’an 2000 ; deux ans après s’ouvrent pour Fran ois Cheng les portes de l’Académie Fran aise ; plusieurs titres de la jeune Shan Sa figurent sur la liste des bestsellers ; Balzac et la petite tailleuse chinoise, le premier roman de Dai Sijie, cinéaste devenu romancier, conna t un succès international particulièrement phénoménal.
Perceived risk of HIV infection and mental health in rural Malawi
Ning Hsieh
Demographic Research , 2013,
Abstract: BACKGROUND The emerging literature on HIV/AIDS and mental health in sub-Saharan Africa stresses that HIV-positive status is significantly related to mental illness. However, the literature has neglected an equally important concern in contexts where HIV is highly prevalent, namely, whether and how an HIV/AIDS epidemic affects the mental well-being of individuals in the general population, regardless of their HIV status. OBJECTIVE This paper adopts an innovative perspective for addressing this public mental health concern in sub-Saharan Africa. It examines the relationship between perceived risk of HIV infection and mental health in rural Malawi and evaluates four psychosocial mechanisms that potentially influence the relationship, including (1) worry about being infected and fear of death, (2) health and economic conditions, (3) social support, and (4) the stigma of HIV/AIDS. METHODS The analysis uses data from the Malawi Longitudinal Study of Families and Health collected in 2006 and 2008. Random-effects and fixed-effects linear regression models are used to predict mental health status (measured by the SF-12 Mental Component Summary scale). RESULTS Regardless of HIV status, the perceived risk of infection has a strong negative relationship with mental health outcomes. This relationship is in part associated with the individual's health, fear of death (or pessimism about survival), and marital/cohabitation status CONCLUSIONS Mental health concerns in the context of an HIV/AIDS epidemic need to be addressed not only for HIV-infected individuals, but also for those who are not infected but are uncertain and fearful about being infected and about the ensuing life changes.
實徵研究/Service-learning as Effective Pedagogy for Information Literacy and Technology Competency Instruction in a Cross-Disciplinary, Cross-Cultural Context / Cynthia Hsieh
  Cynthia Hsieh
Journal of Library and Information Science , 2008,
Abstract: This article provides a detailed description of an interdisciplinary project for teaching information literacy and technology competency that overcomes institutional barriers and socioeconomic gaps – two obstacles that often hinder collaboration between higher education institutions and their local communities. Most importantly, it proposes a model of powerful pedagogical partnership between librarians and teaching faculty. The article first describes the background and philosophy of the project and provides a detailed account of the project implementation and pedagogies. A key element of the project design is the service-learning component that provides a “real world” environment to accelerate students’ learning experience. Finally, it offers valuable suggestions to those who wish to collaborate in a similar project. 頁次:4-18
Electromagnetophoresis of a Colloidal Sphere in a Spherical Cavity  [PDF]
Tzu H. Hsieh, Huan J. Keh
Journal of Electromagnetic Analysis and Applications (JEMAA) , 2014, DOI: 10.4236/jemaa.2014.610027
Abstract: The quasi-steady electromagnetophoretic motion of a spherical colloidal particle positioned at the center of a spherical cavity filled with a conducting fluid is analyzed at low Reynolds number. Under uniformly applied electric and magnetic fields, the electric current and magnetic flux density distributions are solved for the particle and fluid phases of arbitrary electric conductivities and magnetic permeabilities. Applying a generalized reciprocal theorem to the Stokes equations modified with the resulted Lorentz force density and considering the contribution of the magnetic Maxwell stress to the force exerted on the particle, which turns out to be important, we obtain a closed-form formula for the migration velocity of the particle valid for an arbitrary value of the particle-to-cavity radius ratio. The particle velocity in general decreases monotonically with an increase in this radius ratio, with an exception for the case of a particle with high electric conductivity and low magnetic permeability relative to the suspending fluid. The asymptotic behaviors of the boundary effect on the electromagnetophoretic force and mobility of the confined particle at small and large radius ratios are discussed.
Light Enhancement of Solar Module  [PDF]
Hsin-Hsin Hsieh, Jen-Loong Hwang, Chia-Yu Lin, Jang-Hsing Hsieh
Energy and Power Engineering (EPE) , 2014, DOI: 10.4236/epe.2014.614044
Abstract: This paper presents sputtered-deposited Ag nanoparticles (NPs) on the encapsulant material (ethylene vinyl acetate, EVA) with the variation of annealing condition on crystalline silicon solar cell to enhance the light intensity, and a conventional solar cell is also performed for comparison. It was found that an increase in the transmittance at the wavelength of 500 - 800 nm was detected in the Ag nanoparticle solar cells. And red-light enhancement of around 2% was measured in the Ag-sputtered solar module under annealing condition of 700 for 3 min from incident photon to converted electron (IPCE) profile. The photovoltaic performance of solar modules was characterized by a flasher system in AAA class (temporal instability, spectral match, and irradiance non-uniformity). The IV curve showed a current enhancement with Ag-EVA sample, and thus a high power output around 0.250 W was observed. A high fill factor of 73.63% also implied a high performance in series and shunt resistance. Surface plasmonic resonance effects of Ag nanoparticles deposited on the surface of solar cell were examined and discussed. This paper not only illustrated the performance of the surface plasmonic resonance of a solar device but also verified the application in the industrial production.
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