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金邱顯,林鍾福,吳吉相 中央醫學社 1965 中央醫學 Vol.8 No.1
A eighteen year-old Korean male was entered to the Hospital with chief complains of high fever, chillness, headache, diffuse swelling and tenderness on the right lateral neck below the mastoid tip for thirteen days duration. The patient gave a history of hearing impairment, tinnitus, purulent discharge on the right ear for 10 years. On physical examination right ear drum revealed total defect with foul swelling purulent discharge and considerable amount of cholesteatornatous masess in the tympanic cavity. On the day of admission radical mastoidectomy was performed. The mastoid antrum was filled with cholesteatoma and sigmoid sinus demonstrated bony erosion with perisinus abscess. Deep cervical abscess was drained with external cervical incision. The abscess cavity appeared to be communicated with inner surface of the mastoid tip. The patient was discharged in good condition on fourteenth postoperative day.
Numerical Analysis of Si-based Photovoltaic Modules with Different Interconnection Methods
박치홍,윤나리,민용기,고재우,임종복,장동식,안재현,안형근 한국전기전자재료학회 2014 Transactions on Electrical and Electronic Material Vol.15 No.2
This paper investigates the output powers of PV modules by predicting three unknown parameters: reverse saturationcurrent, and series and shunt resistances. A theoretical model using the non-uniform physical parameters of solarcells, including the temperature coefficients, voltage, current, series and shunt resistances, is proposed to obtainthe I-V characteristics of PV modules. The solar irradiation effect is included in the model to improve the accuracyof the output power. Analytical and Newton methods are implemented in MATLAB to calculate a module output. Experimental data of the non-uniform solar cells for both serial and parallel connections are used to extend theimplementation of the model based on the I-V equation of the equivalent circuit of the cells and to extend theapplication of the model to m by n modules configuration. Moreover, the theoretical model incorporates, for the firsttime, the variations of series and shunt resistances, reverse saturation current and irradiation for easy implementationin real power generation. Finally, this model can be useful in predicting the degradation of a PV system because ofevaluating the variations of series and shunt resistances, which are critical in the reliability analysis of PV powergeneration.