• International Journal of Safety
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• v.1 no.1
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• pp.36-42
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• 2002

This paper is aimed at predicting the life of rubber insulating gloves under normal operating stresses from relatively rapid test performed at higher stresses. Specimens of rubber insulating gloves are subject to multiple stress conditions, i.e. combined electrical and thermal stresses. Two modes of electrical stress, step voltage stress and constant voltage stress are used in specimen aging. There are two types of test for electrical stress in this experiment: the one is Breakdown Voltage (BDV) test under step voltage stress and thermal stress and the other is lifetime test under constant voltage stress and temperature stress. The ac breakdown voltage defined as the break-down point of insulation that leakage current excesses a limit value, l0mA in this experiment, is determined. Because the very high variability of aging data requires the application of statistical model, Weibull distribution is used to represent the failure times as the straight line on Weibull probability paper. Weibull parameters are deter-mined by three statistical methods i.e. maximum likelihood method, graphical method and least squares method, which employ SAS package, Weibull probability paper and FORTRAN, respectively. Two chosen models for predicting the life under simultaneous electrical and thermal stresses are inverse power model and exponential model. And the constants of life equation for multistress aging are calculated using numerical method, such as Gauss Jordan method etc.. The completion of life equation enables to estimate the life at normal stress based on the data collected from accelerated aging test. Also the comparison of the calculated lifetimes between the inverse power model and the exponential model is carried out. And the lifetimes calculated by three statistical methods with lower voltage than test voltage are compared. The results obtained from the suggested experimental method are presented and discussed.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.11
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• pp.6604-6612
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• 2014

The purpose of this study was to provide basic knowledge and a proper education-training program for hotel enterprises. The results are as follows. First, an education-training program was focused on five factors. Service quality, Job, Organization culture, Self improvement, and Language. Second, the Importance Performance Analysis Result show that Keep the Good Work variables are the Customer reception, Food hygiene, Hygienic management, Cooking, First aid, Self development, and Communication. Possible excesses include Customer satisfaction, Business vision, Brand, Prevention of sexual harassment, Multiple cultures. Finally, an education training program should focus mainly on 'Manner', 'Table manner', 'Personal hygiene' and 'Chinese'.

• The Bulletin of The Korean Astronomical Society
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• v.39 no.2
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• pp.54-54
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• 2014

We use dense redshift surveys of nine galaxy clusters at z ~ 0.2 to compare the galaxy distribution in each system with the projected matter distribution from weak lensing. By combining 2087 new MMT/Hectospec redshifts and the data in the literature, we construct spectroscopic samples within the region of weak-lensing maps of high (70-89%) and uniform completeness. With these dense redshift surveys, we construct galaxy number density maps using several galaxy subsamples. The shape of the main cluster concentration in the weak-lensing maps is similar to the global morphology of the number density maps based on cluster members alone, mainly dominated by red members. We cross correlate the galaxy number density maps with the weak-lensing maps. The cross correlation signal when we include foreground and background galaxies at 0.5zcl < z < 2 zcl is 10 - 23% larger than for cluster members alone at the cluster virial radius. The excess can be as high as 30% depending on the cluster. Cross correlating the galaxy number density and weak-lensing maps suggests that superimposed structures close to the cluster in redshift space contribute more significantly to the excess cross correlation signal than unrelated large-scale structure along the line of sight. Interestingly, the weak-lensing mass profiles are not well constrained for the clusters with the largest cross correlation signal excesses (>20% for A383, A689 and A750). The fractional excess in the cross correlation signal including foreground and background structures could be a useful proxy for assessing the reliability of weak-lensing cluster mass estimates.

• Journal of the Korean Institute of Oriental Medical Informatics
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• v.18 no.1
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• pp.78-115
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• 2012

Pulse diagnosis has been highly valued in many East Asian medical books, since "Huangdaineijing(黃帝內經)" published. Gigoo-inyoung pulse method(氣口人迎脈法) is one of the four pulse diagnostic methods originally written in"Huangdaineijing(黃帝內經)". At the late 3rd century, "Maijing(脈經)" redefined the positions of Gigoo-inyoung pulse(氣口人迎脈). According to "Maijing(脈經)", both spots were 1fen(分) in front of guan(關) but Gigoo on the right hand and Inyoung on the left hand. At the middle of 13th century, "Maekgyolejijangbyungsikdoseol(脈訣指掌病式圖說)" had detailed view points about the manner of reading Gigoo-inyoung pulse. "Maekgyolejijangbyungsikdoseol(脈訣指掌病式圖說)" explained clearly the position of 1fen(分) in front of guan(關) by sketch of wrist. The location indicated the border of cun(寸) and guan(關). It also explained clearly corresponding certain cun-guan-chi(寸關尺) with Gigoo-inyoung pulse by sketch. "Euihackipmoon(醫學入門)" is a comprehensive book on medicine written by Lee-Cheon(李梴) in Ming(明) dynasty. In this book, pulse diagnosis is the most emphasized method among the four techniques of diagnosis(四診). Furthermore, it introduces detailed information about Gigoo-inyoung pulse method(氣口人迎脈法) in "Gigoo-inyoungmaekgyole(氣口人迎脈訣)". Lee-Cheon concured in the theory of "Yeongruegumbang(永類鈐方)" and "Maekgyolejijangbyungsikdoseol(脈訣指掌病式圖說)" and put a short essay about Gigoo-inyoung pulse named "Gigoo-inyoungmaekgyole(氣口人迎脈訣)" quoted from the two books. Therefore, throughout many chapters of "Euihackipmoon(醫學入門)", Gigoo-inyoung pulse is used in order to distinguish internal damage(內傷) and external contraction(外感). "Maekgyolejijangbyungsikdoseol(脈訣指掌病式圖說)" and "Euihackipmoon(醫學入門)" understood Gigoo-inyoung pulse commonly by corresponding certain cun-guan-chi(寸關尺) with Gigoo-inyoung pulse. Therefrom, Gigoo-inyoung pulse can distinguish seven emotions(七情) of internal damage(內傷) or six excesses(六淫) of external contraction(外感).

• The Korean Journal of Applied Statistics
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• v.23 no.5
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• pp.835-844
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• 2010

Tools for statistical analysis of extreme values include the classical annual maximum method, the modern threshold method and variants improving the second one. While the annual maximum method is to t th generalized extreme value distribution to the annual maxima of a time series, the threshold method is to the generalized Pareto distribution to the excesses over a high threshold from the series. In this paper we deal with the Poisson-GPD method, a variant of the threshold method with a further assumption that the total number of exceedances follows the Poisson distribution, and apply it to the daily percentage increases and decreases computed from the spot prices of West Texas Intermediate, which were collected from January 4th, 1988 until December 31st, 2009. According to this analysis, the distribution of daily percentage increases as well as decreases turns out to have a heavy tail, unlike the normal distribution, which coincides well with the general phenomenon appearing in the analysis of lots of nowaday nancial data.

• Communications for Statistical Applications and Methods
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• v.16 no.5
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• pp.803-812
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• 2009

The application of extreme value theory to financial data is a fairly recent innovation. The classical annual maximum method is to fit the generalized extreme value distribution to the annual maxima of a data series. An alterative modern method, the so-called threshold method, is to fit the generalized Pareto distribution to the excesses over a high threshold from the data series. A more substantial variant is to take the point-process viewpoint of high-level exceedances. That is, the exceedance times and excess values of a high threshold are viewed as a two-dimensional point process whose limiting form is a non-homogeneous Poisson process. In this paper, we apply the two-dimensional non-homogeneous Poisson process model to daily losses, daily negative log-returns, in the data series of KBW/USD exchange rate, collected from January 4th, 1982 until December 31 st, 2008. The main question is how to estimate extreme quantiles of losses such as the 10-year or 50-year return level.

• Herbal Formula Science
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• v.26 no.2
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• pp.147-170
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• 2018

Objectivs : This report describes the studies as follows through the research of 163prescribtions in low-chapter from Bangyakhappyun. Methods : Analysis the 163prescribtions of basic prescribtions, therapeutic area, symptoms and pathology. Result : Many prescriptions are contained in the diseases areas such as defecate diseases, women diseases, internal diseases, exogenous febrile diseases. And prescriptions in the low-chapter are used in the areas such as eye, aggregation, mouth and tongue, teeth, hand, back, neck, emergency. Eighty-five basic prescriptions are analyzed from the low-chapter and the ratio of nineteen prescriptions containing Ijintang, Pyeongwisan, Oryungsan, Samultang, Sunggitang, Jichultang are over 60%. The efficacy classifications containing basic prescriptions frequently used are researched in the following order: heat-clearing and fire-purging formulae, digestant formulae, phlegm-dispelling formulae, qi-regulating formulae and blood-activating formulae. And tonifying and replenishing formulae are rarely used. Most of the prescriptions in the low-chapter are used for the excess syndrome and few of them are used for the deficiency syndrome. And six excesses, food damage, phlegm are the major causes of excess syndrome. Conclusions : As s result of study on analysis all prescriptions in low-chapter from Bangyakhappyun. We can understand more about basic prescriptions, symptoms of prescriptions and pathology.

• 한국신재생에너지학회:학술대회논문집
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• 2011.11a
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• pp.60.2-60.2
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• 2011

A study of the non-linear optical properties of nanocrystal-Si embedded in SiO2 has been performed by using the z-scan method in the nanosecond and femtosecond ranges. Substoichiometric SiOx films were grown by plasma-enhanced chemical-vapor deposition(PECVD) on silica substrates for Si excesses up to 24 at/%. An annealing at $1250^{\circ}C$ for 1 hour was performed in order to precipitate nanocrystal-Si, as shown by EFTEM images. Z-scan results have shown that, by using 5-ns pulses, the non-linear process is ruled by thermal effects and only a negative contribution can be observed in the non-linear refractive index, with typical values around $-10-10cm^2/W$. On the other hand, femtosecond excitation has revealed a pure electronic contribution to the nonlinear refractive index, obtaining values in the order of 10-12 cm2/W. Simulations of heat propagation have shown that the onset of the temperature rise is delayed more than half pulse-width respect to the starting edge of the excitation. A maximum temperature increase of ${\Delta}T=123.1^{\circ}C$ has been found after 3.5ns of the laser pulse maximum. In order to minimize the thermal contribution to the z-scan transmittance and extract the electronic part, the sample response has been analyzed during the first few nanoseconds. By this method we found a reduction of 20% in the thermal effects. So that, shorter pulses have to be used obtain just pure electronic nonlinearities.

• Journal of The Korean Astronomical Society
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• v.37 no.4
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• pp.281-284
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• 2004

Optical imaging and spectroscopy of G353.2+0.9, the brightest part of the giant H II region NGC 6357, shows that this H II region is optically thin, contains ${\~}300\;M_{\bigodot}$ of ionized gas and is probably expanding into the surrounding medium. Its chemical composition is similar to that found in other H II regions at similar galactocentric distances if temperature fluctuations are significant. The inner regions are probably made of thin shells and filaments, whereas extended slabs of material, maybe shells seen edge-on, are found in the periphery. The radio continuum and H$\alpha$ emission maps are very similar, indicating that most of the optical nebula is not embedded in the denser regions traced by molecular gas and the presence of IR sources. About $10^{50}$ UV photons per second are required to produce the H$\beta$ flux from the 1l.3'${\times}$10' region surrounding the Pis 24 cluster that is south of G353.2+0.9. Most of the energy powering this region is produced by the 03-7 stars in Pis 24. Most of the 2MASS sources in the field with large infrared excesses are within G353.2+0.9, indicating that the most recent star forming process occured within it. The formation of Pis 24 preceded and caused the formation of this new generation of stars and may be responsible for the present-day morphology of the entire NGC 6357 region.

• Journal of The Korean Astronomical Society
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• v.37 no.4
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• pp.285-288
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• 2004

Near-infrared imaging photometry supplemented by optical spectroscopy and narrow-band imaging of the H II region Sh 2-128 and its environment are presented. This region contains a developed H II region and the neighboring compact H II region S 128N associated with a pair of water maser sources. Midway between these, the core of a CO cloud is located. The principal ionizing source of Sh 2-128 is an 07 star close to its center. A new spectroscopic distance of 9.4 kpc is derived, very similar to the kinematic distance to the nebula. This implies a galactocentric distance of 13.5 kpc and z = 550 pc. The region is optically thin with abundances close to those predicted by galactocentric gradients. The $JHK_s$ images show that S 128N contains several infrared point sources and nebular emission knots with large near-infrared excesses. One of the three red Ks knots coincides with the compact H II region. A few of the infrared-excess objects are close to known mid- and far-infrared emission peaks. Star counts in J and $K_s$ show the presence of a small cluster of B-type stars, mainly associated with S 128N. The $JHK_s$ photometric properties together with the characteristics of the other objects in the vicinity suggest that Sh 2-128 and S 128N constitute a single complex formed from the same molecular cloud, with ages ${\~}10^6$ and < $3 {\times} 10^5$ years respectively. No molecular hydrogen emission was detected at 2.12 ${\mu}m$. The origin of this remote star forming region is an open problem.