• Journal of the Korea Safety Management & Science
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• v.11 no.3
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• pp.139-148
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• 2009

In a real-life supply chain environment, demand forecasting is usually represented by probabilistic distributions due to the uncertainty inherent in customer demands. However, the customer demand used for an actual supply chain planning is a single deterministic value for each of periods. In this paper we study the choice of single demand value among of the given customer demand distribution for a period to be used in the supply chain planning. This paper considers distributed multi-echelon supply chain and the objective function of this paper is to minimize the total costs, that is the sum of holding and backorder costs over the distribution network under the service level constraint, by using demand selection scheme. Some useful findings are derived from various simulation-based experiments.

• 대한예방의학회:학술대회논문집
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• 1994.02b
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• pp.158-163
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• 1994

Slightly elevated urinary albumin excretion rate (microalhuminuria) is a marker of early diabectic nephropathy, but it is unclear if the established definition of microalbuminuria ($20-200{\mu}g/min$) is correct for children and adolescents. We investigated th.: albumin excretion rate, albumin/creatinine ratio and urinary albumin concentration in 150 healthy schoolchildren and adolescents to (a) obtain a reterence value for albumin excretion rate, (b) relate albumin excretion to pubertal stages and (c) evaluate albumin/creatinine ratio and morning albumin concentration as screening methods for elevated albumin excretion rate. Albumin concentration was measured by immunoturbidimetry in timed overnight urine samples. The albumin excretion showed a skewed distribution (geometric mean $3.2{\mu}g/min$, 95 percentile ($15.1{\mu}g/min$). In girls. a peak in the albumin excretion rate was found at the pubertal stage 4 (Tanner) and in boys at stage 5. Albumin/creatinine ratio of 2.5 mg/mmol as a screening level for elevated albumin excretion ($15{\mu}g/min$) showed a high positive (0.88) and negative (0.99) predictive value.

• Journal of Labour Economics
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• v.40 no.3
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• pp.1-28
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• 2017

Using Korea Labor and Income Panel Surveys data, this paper estimates the effect of schooling level on income over time and the effect of children's education level on intergenerational income persistence. The results show that the impact of education level on income decreased over time. Also, intergenerational income persistence, measured as a dummy variable that has value one if children's income percentile group is same as the father's, increased with children's educational attainment only when the father is in upper income percentile groups. These findings indicate that education fails to play a significant role of the economic ladder and does not much help in raising intergenerational income mobility. Rather, education may possibly function as a means of intergenerational transmission of wealth through parental investment in their children's private education.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.34 no.1
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• pp.117-133
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• 2014

In this study, we analysed impacts of the recent increasing trend of exceedance rainfall thresholds for separation of data set and different research periods using Quantile Regression (QR) approach. And also we performed significant test for time series data using linear regression, Mann-Kendall test and Sen test over the Korean major 8-city. Spring and summer precipitation was tend to significant increase, fall and winter precipitation was tend to decrease, and heavy rainy days in last 30 years have increased from 3.1 to 15 percent average. In addition, according to the annual ranking of rainfall occurs Top $10^{th}$ percentile of precipitation for 3IQR (inter quartile range) of the increasing trend, most of the precipitation at the point of increasing trend was confirmed. Quantile 90% percentile of the average rainfall 43.5mm, the increasing trend 0.1412mm/yr, Quantile 99% percentile of the average rainfall 68.0mm, the increasing trend in the 0.1314mm/yr were analyzed. The results can be used to analyze the recent increasing trend for the annual maximum value series information and the threshold extreme hydrologic information. And also can be used as a basis data for hydraulic structures design on reflect recent changes in climate characteristics.

• Journal of Korean Society of Rural Planning
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• v.20 no.1
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• pp.27-36
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• 2014

The purposes of this study are to identify assessment items to evaluate riverfront for amenity and recreation and to analyze the relative importance of the items using Analytic Hierarchy Process(AHP). Total 15 items of 5 categories were identified through literature review and panel discussion. Based on the AHP analysis results, a weighted value was set for each of the layers in the hierachy. 'Ecological Characteristics' (0.333) was rated with the highest weighted value. followed by 'Landscape Characteristics'(0.190) and 'Physical Characteristics'(0.166). Among the assessment items, 'Water Quality' (0.152) and 'River Naturality'(0.118) had higher weighted values. With the set of assessment items field assessments were carried out for Gyung-An Stream of Gyeonggi-Do to exam its applicability. Total 6 segments and 31 reaches out of the 22.5 km long river were evaluated and the mean scores of the five categories were converted into a percentile score for comparison. Overall, the segments which had higher scores were located close to neighborhood areas and had better connections with other historical and cultural amenities. Also, existing facilities was an important factor and needs to be considered for waterfront development.

• Journal of the Korean Society of Costume
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• v.53 no.7
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• pp.47-55
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• 2003

The purpose of this study was to provide information on how to improve the comfort and fit of womens swimsuits through analysis of the present wearing conditions and users complaints. In order to compile the information about dissatisfaction with the appropriateness of the fit of breast cap for swimsuits, a questionnaire was administered to 364 females (over 20 years old under 60 years old). The contents of the questionnaire consisted of questions such as the reasons for selecting to wear breast cap for swimsuits or not, size of brassiere and swimsuits, dissatisfaction with material, dissatisfaction with function of breast cap. The collected data were analyzed using the descriptive statistics value of frequencies and percentile value, mean, and so on by means of the SPSS WIN.10.0 program. The differences among age groups, body type groups by rohrer index, cup size and so on were compared using the chi-square test. Results of the survey responses about swimsuits breast caps: Most women have worn swimsuits with caps. According to the results, women who are older or overweight, or have larger breasts, or breasts which sag, as well as those who have had the experience of giving birth responded that they feel uncomfortable because of the slope of their breasts. Concerning complaints about the caps, 61% of respondents complained about the cap size and lack of correspondence with breast size, 56.8% expressed concern about the cap gap. There is significant difference in wearing reason of breast caps forswimsuits among age groups and many kinds of groups.

• The Journal of Pediatrics of Korean Medicine
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• v.12 no.1
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• pp.95-110
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• 1998

I intended to be helpful to understand significant cause for treated patients comed to Dept of Pediatrics growth clinic in short stature of delayed growth and effect of oriental medical therapy. I studied at first 54 patients(36 men and 18 women) comed to Dept. of Pediatrics growth clinic of Dongguk Pundang Oriental Hospital and investigated characteristics, remidial value and side effect which 20 patients(1l men and 9 women) treated oriental medical therapy in short stature of delayed growth between June 1997 and October 1998. First study resulted the average was 8.37 year(chronological age), 6.96 year(bone age), 15.43 (height percentile by age), 164.2 cm(mid parental height) and the ratio of using the prescription was Bojunggunatang-derivative at first. second study resulted the distribusions of remedial values were improved(55.0%) and no improved(45.0%) patients. remedial values was affected by appetite.

• Journal of the Korean Home Economics Association
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• v.27 no.1
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• pp.141-164
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• 1989

The Purpose of this study is to investigate the relationship between the urban home-maker's view of homemanagement and the domestic courtesy and ritual (wedding ceremany, ancestral service, funeral rites). The data for this study was obtained from the 661 homemakers who live in Seoul, Busan, Inchon etc. The data were analyzed by the method described below with SPSS Computer programs. Such methods as frequence, percentile, analysis of variance (t-test, one-way ANOVA), Pearson's correlation and Factor analysis, Multiple regression were used. The major results the study can be summaried as follows; 1) As the result of factor analysis about view of homemanagement, 10 factors (which Eigen Value was above 1.0) out of 28 guestions were extracted. 2) In general, it can be said that the urban Homemaker's View of homemanagement varies by age, level of education, religion. 3) The domestic courtesy and ritual (wedding ceremony, ancestral servic, funeral rites) varies by age, level of education, religion. 4) There is a positive relation in analyzing the correlation between the urban homemaker's view of homemanagement and domestic courtesy and ritual (wedding ceremony, ancestral service, funeral rites)(p<.001).

• Journal of Family Resource Management and Policy Review
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• v.1 no.1
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• pp.57-70
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• 1997

The purpose of this study is to analyze housewives’ cognition, usage, and management behavior of credit cards according to home management behavior pattern. The sample of this study was selected from the housewives’ living in Seoul who has credit cards. After class-analyzation of the sample, 523 out of 612 repondents were finally selected data. The data were analyzed by the statical methods such as frequency, mean, percentile, Factor Analysis, t-test, ANOVA, Duncan’s multiple range test, Person’s Correlation, and Multiple Regression Analysis through the SAS program package. The major findings of this study are as followers : First, housewives’ usage and management behavior of credit cards was a positive relationship between home management behavior pattern. Second, housewives’ cognition of credit cards showed a significant positive relationship with usage and management behavior of credit card. Third, the most influencial variables on housewives’usage and management behavior of credit cards were their value and home management behavior pattern.

• Journal of Magnetics
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• v.19 no.2
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• pp.174-180
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• 2014

In this paper, a new and simple method is proposed to quickly estimate the induced electric field in the human child exposed to a 100 kHz-10 MHz magnetic field, for the sake of electromagnetic field (EMF) safety assessment. The quasi-static finite-difference time-domain (FDTD) method is used to calculate the induced electric fields in high resolution 3D human child models with various body size parameters, in order to derive the correction factor for the estimation equation. The calculations are repeated for various frequencies and incident angles of the magnetic field. Based on these calculation results, a new and simple estimation equation for the 99th percentile value of the body electric field is derived that depends on the body size parameters, and the incident magnetic field. The estimation errors were equal to or less than 5.1%, for all cases considered.