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  1. No Access

    Article

    Large Deviations for Large Capacity Loss Networks with Fixed Routing and Polyhedral Admission Sets

    In this paper, we study large deviations of large capacity loss networks with fixed routing. We use two-level modelling for the loss networks: the call level and the cell level. At the call level, a call reque...

    Cheng-Shang Chang, Hung-Jen Wang in Discrete Event Dynamic Systems (1997)

  2. Article

    Novel Synthesis, Characterization, and Physical Properties of Self-Doped Sulfonated Polyaniline by Copolymerization between p-Aminodiphenylamine and o-Aminobenzenesulfonic Acid

    Sulfonated polyaniline has been synthesized by a novel method, in which p-aminodiphenylamine (p-APA) and o-aminobenzenesulfonic acid (o-ABS) are copolymerized. The copolymers produced have the same composition ev...

    Naonori Ohno, Hung-Jen Wang, Hu Yan, Naoki Tosnima in Polymer Journal (2001)

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    Article

    One-Step and Two-Step Estimation of the Effects of Exogenous Variables on Technical Efficiency Levels

    Consider a stochastic frontier model with one-sided inefficiency u, and suppose that the scale of u depends on some variables (firm characteristics) z. A “one-step” model specifies both the stochastic frontier an...

    Hung-jen Wang, Peter Schmidt in Journal of Productivity Analysis (2002)

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    Article

    Heteroscedasticity and Non-Monotonic Efficiency Effects of a Stochastic Frontier Model

    We consider a model that provides flexible parameterizations of the exogenous influences on inefficiency. In particular, we demonstrate the model's unique property of accommodating non-monotonic efficiency eff...

    Hung-Jen Wang in Journal of Productivity Analysis (2002)

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    Chapter and Conference Paper

    Simulation Studies of Two-Layer Hopfield Neural Networks for Automatic Wafer Defect Inspection

    The occurrence of defect on a wafer may result in losing the yield ratio. The defective regions were usually identified through visual judgment with the aid of a scanning electron microscope. Dozens of people ...

    Chuan-Yu Chang, Hung-Jen Wang, Si-Yan Lin in Advances in Applied Artificial Intelligence (2006)

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    Reference Work Entry At a glance

    Stochastic Frontier Models

    The stochastic frontier model was first proposed by Aigner, Lovell and Schmidt (1977) and Meeusen and van den Broeck (1977) in the context of production function estimation. The model extends the classical pro...

    Hung-Jen Wang in The New Palgrave Dictionary of Economics (2008)

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    Living Reference Work Entry In depth

    Stochastic Frontier Models

    The stochastic frontier model was first proposed in the context of production function estimation to account for the effect of technical inefficiency. The inefficiency causes actual output to fall below the po...

    Hung-Jen Wang in The New Palgrave Dictionary of Economics

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    Article

    Study of Spectroscopy and Microstructure in Nanocrystalline Cr-Doped Fibers Grown by the Drawing-Tower Technique

    The spectroscopy and microstructure of Cr-doped fibers (CDFs) fabricated by the drawing-tower technique are investigated. The spontaneous emission spectrum exhibited broadband emission of 1.2 μm to 1.55 μm. High-...

    Yi-Chung Huang, Yen-Sheng Lin, Jau-Sheng Wang in Journal of Electronic Materials (2011)

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    Article

    Development of cellular therapy for the treatment of stress urinary incontinence

    Stress urinary incontinence (SUI) is highly prevalent and associated with a reduced quality of life. An intact rhabdosphincter at the mid-urethra is mandatory to maintain urinary continence. Adult stem cell in...

    Hung-Jen Wang, Yao-Chi Chuang, Michael B. Chancellor in International Urogynecology Journal (2011)

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    Article

    Neurotoxin Use for Voiding Dysfunction

    Botulinum neurotoxin injection into the urethral sphincter has been shown to be effective in the treatment of neurogenic and non-neurogenic detrusor-sphincter dyssynergia. In this article, we review the ration...

    Hung-Jen Wang, Yao-Chi Chuang, Michael B. Chancellor in Current Bladder Dysfunction Reports (2011)

  11. No Access

    Article

    A Bayesian estimator for stochastic frontier models with errors in variables

    A Bayesian estimator is proposed for a stochastic frontier model with errors in variables. The model assumes a truncated-normal distribution for the inefficiency and accommodates exogenous determinants of inef...

    Sheng-Kai Chang, Yi-Yi Chen, Hung-Jen Wang in Journal of Productivity Analysis (2012)

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    Article

    Semantic real-world image classification for image retrieval with fuzzy-ART neural network

    Image retrieval based on semantic learning has attracted considerable attention in recent years. Analyzing the contents of an image and retrieving corresponding semantics are important in semantic-based image ...

    Hung-Jen Wang, Chuan-Yu Chang in Neural Computing and Applications (2012)

  13. No Access

    Chapter

    Subjective Knowledge Foundation of the Cross-Taiwan Straits International Peace Discourse

    To analyze the short-term prospects for political relations between China and Taiwan, I will review the subjective factors and dimensions affecting those relations and the ways in which the two sides are prese...

    Hung-jen Wang in Interpreting China as a Regional and Global Power (2014)

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    Chapter

    Estimation of Technical Inefficiency in Production Frontier Models Using Cross-Sectional Data

    In this paper, we discuss the specification and estimation of technical efficiency in a variety of stochastic frontier production models. The focus is on cross-sectional models. We start from the basic neoclas...

    Subal C. Kumbhakar, Hung-Jen Wang in Benchmarking for Performance Evaluation (2015)

  15. No Access

    Article

    Evaluation of immunomagnetic separation for the improvement of Salmonella detection in aquatic environment

    This study compares various immunomagnetic separation (IMS) protocols. The average recovery efficiency of IMS for different Salmonella concentrations (between 102 and 105 CFU/ml) was 53.5 ± 12.9 % (n = 24). When ...

    Hsien-Lung Tsai, Bing-Mu Hsu, Tsui-Kang Hsu, Kuan-Hao Huang in Environmental Earth Sciences (2015)

  16. No Access

    Article

    Nocturia indicates a poor health status and increases mortality in male patients with type 2 diabetes mellitus

    To investigate the association between nocturia and erectile dysfunction, androgen deficiency, overactive bladder and systemic diseases in men with type 2 diabetic mellitus.

    Hui-Ying Liu, Min-Shen Chung, Hung-Jen Wang in International Urology and Nephrology (2016)

  17. No Access

    Article

    Nonparametric estimation of the determinants of inefficiency

    We consider the benchmark stochastic frontier model where inefficiency is directly influenced by observable determinants. In this setting, we estimate the stochastic frontier and the conditional mean of ineffi...

    Christopher F. Parmeter, Hung-Jen Wang in Journal of Productivity Analysis (2017)

  18. No Access

    Reference Work Entry In depth

    Stochastic Frontier Models

    The stochastic frontier model was first proposed in the context of production function estimation to account for the effect of technical inefficiency. The inefficiency causes actual output to fall below the po...

    Hung-Jen Wang in The New Palgrave Dictionary of Economics (2018)

  19. No Access

    Article

    Efficacy and persistence of low-dose mirabegron (25 mg) in patients with overactive bladder: analysis in a real-world urological practice

    Mirabegron is a relatively new drug to treat overactive bladder (OAB). The therapeutic doses are between 25 and 100 mg in clinical trials. We aimed to evaluate the efficacy and persistence of low-dose mirabegr...

    Yuan Chi Shen, Hung Jen Wang, Yao Chi Chuang in International Urology and Nephrology (2018)

  20. No Access

    Article

    Long-term functional change of cryoinjury-induced detrusor underactivity and effects of extracorporeal shock wave therapy in a rat model

    To investigate the long-term functional change of cryoinjury-induced detrusor underactivity (DU) and the therapeutic potential of repeated low-energy shock wave therapy (LESW).

    Yao-Chi Chuang, Pradeep Tyagi, H. L. Luo in International Urology and Nephrology (2019)

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