• Proceedings of the KIPE Conference
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• 2007.07a
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• pp.518-520
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• 2007

본 논문에서는 주택용 3kW급 태양광발전 계통연계형 인버터에 대하여 설명한다. 기존에 생산된 승압형 DC-DC 컨버터를 추가한 인버터와 토폴로지는 같으나, 설치 장소의 제약을 받지 않도록 실외형 시스템으로 개선하였다. 또한, TMS320F2812, discrete IGBT등의 주요 소자를 채택하여 소형, 경량화 하였고, EMI 노이즈를 저감시켰다.

• Proceedings of the KIEE Conference
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• 2003.11a
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• pp.196-198
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• 2003

The impacts of electric service interruption to customers depend on customer and interruption characteristics. Customer characteristics include demographic aspects(residential type, and number of household members) and power supply types whereas interruption characteristics include frequency, duration, time, and day of interruption. Accordingly evaluation of these customer interruption costs is very complicated and subjective. For residential customers, customer survey method seems most appropriate because interruption impact to residential customers is intangible. In other words, the value of housework or lost leisure due to interruption is individual. Accordingly, this paper selected the customer survey method to assess the interruption costs for residential customers.

• Proceedings of the KIEE Conference
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• 2009.04b
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• pp.212-214
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• 2009

The polymer electrolyte membrane fuel cell(PEMFC) with the advantages of low-operating temperature, high current density, low cost and volume, fast start-up ability, and suitability for discontinuous operation becomes the most reasonable and attractive power system for transportation vehicle and micro-grid power plant in a household. 200W PEMFC(Polymer electrolyte membrane fuel cell) system applied to middle and small-scaled micro-grid power system was constructed by this study, then the electrical characteristics and diagnosis of the fuel cell were analyzed with thermal variation.

• Journal of the Korean Society of Clothing and Textiles
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• v.29 no.2
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• pp.199-209
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• 2005

The purpose of this research is to examine the effect of the 1997 economic crisis on Korean households' clothing expenditures at different incom levels. The raw data sets from the Family Income and Expenditure Survey of 1994, 1996, 198, and 2000 produced by the National Statistical Office were used. Based on their income data, subjects were divided into three groups: upper-income (upper 30%), low-income(lower 30%), and middle-income (the 40% in between). The main results are as follows : 1) the income, consumption expenditures (ConE) and clothing expenditures (CloE) of Korean households increased in 1996, decreased in 1998 and recovered in 2000. Although the proportion of ConE to income increased after the economic crisis, CloE/ConE decreased. Clothing expenditures displayed an asymmetric pattern over the economic crisis : the clothing expenditures decreased severely and quickly during the groups. 2) Compared to other household expenditures, clothing expenditure patterns were unique and of clothing categories, the propottion of expenditures for outwear decreased considerably compared to other categories after the economic crisis.

• 한국정보통신설비학회:학술대회논문집
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• 2008.08a
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• pp.516-520
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• 2008

최근 국내에서는 가입자 댁내까지 광케이블망이 인입되는 FTTH구축이 일반화 되고 있으며, 초고속 인터넷 서비스를 기반으로 통방융합 서비스중의 하나인 IPTV 서비스도 다양한 컨텐츠의 확보로 점차 가입자 수요가 증가되고 있다. 또한 VoIP도 통신사업자를 중심으로 일반전화 시장을 점진적으로 잠식하고 있는 추세이고, 향후 수년 내에 걸쳐 모든 가입자 댁내까지 광케이블망 구축이 완료되어 All IP화가 이루어질 전망이다. 2007년부터 전국적으로 일반주택 및 다세대주택을 대상으로 FTTH구축이 진행되고 있으며, 광간선망에서 분리되어 광배선망 분기지점에 설치되는 광접속합체 및 전주 광분기함에 설치되는 스플리터에 대한 다양한 망구성 방법 등 현재 적용되고 있는 다양한 FTTH 구축방법에 대해서 논하였다. FTTH 가입자 개통 방법에 있어서도 광옥외선을 이용하여 가입자 댁내까지 인입되는 방법 및 현장에서 직접 커백터 조립이 가능한 현장조립형 광커백터에 대한 품질확인 방법에 대해 설명 하고자 한다.

• Communications for Statistical Applications and Methods
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• v.12 no.2
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• pp.381-394
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• 2005

In order to estimate the damage of orchards due' to natural disasters such as typhoon, severe rain, freezing or frost, it is necessary to estimate the number of fruit bearing before and after the damage. To estimate the fruit bearing after the damages are easily done by delegations, but it cost too high to survey every insured farm household and calculate the fruit bearing before the damage. In this article, we suggest to use a random coefficient model to predict the numbers of fruit bearing in the orchards before the damage based on the tree age and the area information.

• The Korean Journal of Applied Statistics
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• v.25 no.6
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• pp.933-945
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• 2012

In this paper we used the KLIPS(Korean Labor and Income Panel tudy) data that surveyed from 2006(wave 9) to 2009(wave 12). Other previous studies are concerned with the panel attrition in the early wave, but this study classifies the response pattern and investigates some factors that influence panel attrition when the panel tends to stabilize. It was revealed that panel attrition was influenced by relocation and housing type through the logit model. Besides it was appeared that panel attrition was affected by the monthly living expenses and the overall household income through the decision tree.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2005.11a
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• pp.637-640
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• 2005

We propose a sound source localization method using the Head-Related-Transfer-Function (HRTF) to be implemented in a given platform. HRTFs contain not only the information regarding proper time delays but also phase and magnitude distortions due to diffraction and scattering by the shading object. Therefore, a set of HRTFs for any given platform provides a substantial amount of information as to the whereabouts of the source. In this study, we introduce new phase criterion in order to find the sound source location in accordance with the HRTF database empirically obtained in an anechoic chamber with the given platform. Using this criterion, we analyze the estimation performance of the proposed method in a household environment.

• Annual Conference of KIPS
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• 2019.10a
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• pp.319-321
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• 2019

최근 여성 1인 가구를 대상으로 주거침입 관련 범죄가 꾸준히 발생하고 있다. 이러한 범죄를 예방하기 위한 한 방법으로는 특정 구역, 위치를 감시하기 위한 목적으로 CCTV(Closed-circuit television)를 설치하는 방법이 있다. 하지만 일반적인 가정용 CCTV의 경우 사용자 커스터마이징이 제한되어 있다. 따라서 본 논문에서는 저비용의 커스터마이징이 가능한 양방향 통신 기반 침입자탐지 시스템을 제안한다.

• The Journal of Korean Society for School & Community Health Education
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• v.19 no.2
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• pp.87-98
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• 2018

Objectives: The purpose of this study is to compare alcohol drinking behaviors between living alone and living together women in Korea. Methods: 6~7th National Heath and Nutrition Examination Survey(2013~2016) data were analyzed using SPSS statistics complex samples. 9,373 Korean Women, aged 19-65 years were included in this study. Among them, 560 participants(5.1%) was living alone women and analyzed between characteristics of drinking behaviors of living alone and living together women. Results: Adjusted confounding variables were analyzed and the risk of light drinking behavior was not significant between the groups. However the group of living alone women showed in higher risk of binge drinking(OR=1.57, 95%CI=1.19-2.07) than those of living together women. Conclusions: Living alone women were associated with binge drinking behaviors compared to living together women. Thus, living alone women are needed to concern on social behaviors including alcohol drinking.