• The Korean Journal of Applied Statistics
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• v.25 no.5
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• pp.803-811
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• 2012

For credit evaluation models, we extend the study of discriminatory power based on AUC obtained from a ROC curve when the number of defaults is small and distribution functions of the defaults and non-defaults are normal distributions. Since distribution functions do not satisfy normality in real world, the distribution functions of the defaults and non-defaults are assumed as normal mixture distributions based on results that the normal mixture could be better fitted than other distribution estimation methods for non-normal data. By using several AUC statistics, the discriminatory power under such a circumstance is explored and compared with those of normal distributions.

• Journal of Oriental Neuropsychiatry
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• v.15 no.1
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• pp.127-141
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• 2004

This is 63 cases report of neurotic patient which have gone to Dep. of Neuropsychiatry of Dongshin University sunchun oriental hospital from October, 2002 to October, 2003. Objective : To find out distributional characteristics of neurotic patient Result : 1. The distribution of sex is Female and of age is thirty, fourty is large. 2. The distribution of a history of case is chronic patient is large. 3. The distributional ratio of psychosomatic : musculoskeletal : gastrointestine symptom of chief complain was 48.7: 25.3: 14.9. 4. The distribution of yanghyulansin ondam: soganhaewul gudam : bohyulansin description was 41.3: 15.9: 9.5. Conclusion : This 63 cases report is relatively small cases about analysis and comparison of neurotic patient. So, it's needed to abundant study of this, afterwards.

• Journal of the Korean Society of Visualization
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• v.8 no.4
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• pp.54-59
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• 2010

A laser moxibustion therapy device having effect similar to that of traditional moxibustion is being developed using 1064 nm infrared laser. The therapy device allows direct interaction of laser light with the tissue rendering temperature distribution both on the skin surface and deep under the skin. We made a device that could measure temperature of deep under the surface of agar gel tissue phantom using thermocouples. A thermal imaging camera was used to verify results from the temperature measurement device. We compared the characteristics of heat transfer inside the tissue phantom during moxibustion and laser irradiation. The temperature distribution measured by thermocouples was found to be similar to that of distribution given by thermal imaging camera.

• Journal of the Korean Society of Manufacturing Technology Engineers
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• v.18 no.4
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• pp.395-400
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• 2009

As the variables affecting the fatigue behavior have uncertainty, the fatigue crack propagation is stochastic in nature. Therefore, the fatigue life prediction is critical for the design and the maintenance of many structural components. In this study, fatigue experiments are conducted on the specimens of magnesium alloy under the different thicknesses of specimen. The effects of specimen thickness on the probability distribution of the fatigue crack propagation life and the crack size are estimated experimentally. The probability distribution of the crack size and the fatigue life for different specimen thicknesses are investigated by Anderson-Darling test and the best fit for those probability distributions are also presented.

• Korean Journal of Ecology and Environment
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• v.38 no.spc
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• pp.27-30
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• 2005

Diel vertical migration (DVM) and horizontal distribution of Chaoborus flavicans larvae were studied in Lake Fukami-ike (maximum depth 7.75 m, Central Japan). The larvae showed a clear migration in the 4 ${\sim}$ 7 m layer during the day and throughout the water column at night. It should be noted that, while old instar distributed throughout the column during the night. Young instar was found only in the 1 ${\sim}$ 4 m layer. An examination of horizontal distribution revealed that larval stage was clearly related with the depth. It suggests that Chaoborus appear to exist in the deeper area during the larval stage.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.15 no.2
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• pp.175-184
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• 1997

In this study, the basic theory of geomagnetism was introduced and the field data of first order magnetic survey was analyzed to determine geographical distribution of magnetic elements such as Declination(D), Inclination(1), Horizontal Component(H), Vertical Component(Z) and Total Force(F). From this distribution equations, the distribution of geomagnetism of Korean peninsula was examined and the declination was calculated for National Base Maps.

• Journal of the Korea Safety Management & Science
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• v.18 no.2
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• pp.65-71
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• 2016

This study was aimed to demonstrate how the analysis of the impact on confidence in the safety-conscious organizations target the clothing distribution center employees and organizational commitment. Safety awareness of employees of the clothing distribution center safety rules, safety education, road safety interests, divided into risk handling and trusted organization with the emotional trust and cognitive trust, organizational commitment was divided into affective, cognitive and normative commitment. Data collection was surveyed 185 people clothing distribution center workers, tested the hypothesis through regression analysis. The results are safety conscious exerts a positive effect on organizational trust, organizational trust was found to have a positive impact on organizational commitment.

• Journal of Korean Society of Water and Wastewater
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• v.18 no.6
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• pp.748-757
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• 2004

In this study, we analyzed the sensitivity of parameters which affect the result of ILLUDAS model, in the various rainfall conditions. The three basins including Namgaja, Kings creek, Gray haven were selected for this research. The rainfall conditions are considered in terms of the rainfall frequency, the duration and the distribution. In most cases, the impermeability area ratio, the sewer slope, and the sewer roughness coefficient give more significant effects on the results than others. The results show that as increasing the rainfall frequency, the sensitivity of the parameters, sewer slope and roughness coefficient are rised, while the impermeability area ratio is decreasing. And also, for the duration of rainfall, the impermeability area ratio's sensitivity shows similar tendency. In case of the rainfall distribution, the parameters of the sewer roughness and the impermeability area ratio show more sensitive in Huff distribution. Especially, The impermeability area ratio is the most sensitive parameter in Central blocking and Yen & Chow distributions respectively.

• Journal of Korean Society of Water and Wastewater
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• v.27 no.2
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• pp.233-239
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• 2013

Sampling rate of Hydraulic pressure data, depending on the intended use of the water distribution system is an important factor. If sampling interval of hydraulic data is short, that will be more useful but it demand a lot of expense for maintenance. In this study, based on simulation of water distribution system 2 khz data, statistical techniques of student t distribution, non-exceedance probability using the optimal sampling rate for research.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.32 no.6
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• pp.571-580
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• 2014

To address unsolved issues of change detection in animated choropleth maps, we proposed the concept of 'gross change detection' and performed an experiment that empirically verifies the incidence of change blindness stems from the 'magnitude of change (MOC)', spatial distribution in animated choropleth maps. We generated experimental materials using the change-characterization arrays and the global Moran's I. Participants had 108 cases of changing maps with time duration (1 to 3 sec) and had questions. The results showed that MOC and duration affect gross change detection, but the most interesting result from our experiment was that different spatial distributions between two adjacent choropleth maps may lead the map reader to under- or over-estimate the level of gross change in the map. It implies that we should consider spatial distribution of change when we design animated choropleth maps.