• 가정과삶의질연구
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• 제20권1호
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• pp.75-86
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• 2002

The purpose of this study is to analyse the change of agricultural labor participation and decision-making involvement of rural women in Korea from 1960s to 1990s. For analysis of these changes, I used the data surveyed and collected by different researchers during those times. During last 40 years, rural society and the mode of agricultural production rapidly changed according to the development of Korean industry. Agricultural labor participation of rural women increased since the mid 1970s. Their agricultural labor expanded into full ranges of farming. Their decision-making involvement also expanded into all divisions of farming. However, they did not have decision making power as much as they contributed to farm labor The expansion of rural women's labor within the sphere of farm production has not substantially altered the decision-making power structure within the farm household.

• 디지털융복합연구
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• 제18권11호
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• pp.43-49
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• 2020

본 연구는 유동성 지표인 가계대출과 M2, 경기변동을 반영하는 산업생산지수를 변수로 설정하여 주택시장에 영향을 미치는 요인을 분석하고 기대 주택가격의 영향을 파악하고자 하였다. 이를 위하여 2005년 1월부터 2020년 5월까지의 자료를 바탕으로 실증분석을 실시하였으며, 주택가격변수는 실질 매매가격지수를 사용하였다. 모형을 3개로 구분하여 각 변수들의 계수 값을 비교한 결과, 실질 가계대출, 실질 M2 순서로 주택가격에 영향을 미치는 것으로 나타났는데 이는 저금리 기조에 따른 레버리지 효과로 인한 결과로 해석할 수 있다. 그리고 과거의 주택가격과 주택가격에 대한 기대는 현재기의 주택가격을 상승시키는 것으로 나타났다. 주택자산에 대한 기대 가격상승률이 높아지면 주택가격이 높아지는데, 이는 시장을 형성하는 중심가치가 투자가치로 변하게 되어 가격상승으로 이어질 수 있다는 점을 시사한다. 이러한 결과는 유동성의 확대가 경기 활성화에 목적을 두고 있음에도 불구하고 주택가격에도 영향을 미칠 수 있다는 결과를 보여주고 있다.

• 한국기계가공학회지
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• 제21권4호
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• pp.1-13
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• 2022

Household refrigerator cabinets must undergo cyclic testing at -20 ℃ and 65 ℃ for quality control (QC) after their production is complete. These cabinets were assembled from different materials, including acrylonitrile butadiene styrene (ABS), polyurethane (PU) foam, and steel plates. However, different thermal expansion values could be observed owing to differences in the mechanical properties of the materials. In this study, a technique to predict delamination on a refrigerator wall caused by thermal deformation was developed. The mechanical properties of ABS and PU foams were tested, theload factors causing delamination were analyzed, delamination was observed using a high-speed camera, and comparison and verification in terms of stress and strain were performed using a finite element model (FEM). The results indicated that the delamination phenomenon of a refrigerator wall can be defined in two cases. A method for predicting and evaluating delamination was established and applied in an actual refrigerator. To determine the effect of temperature changes on the refrigerator, strain measurements were performed at the weak point and the stress was calculated. The results showed that the proposed FEM prediction technique can be used as a basis for virtual testing to replace future QC testing, thus saving time and cost.

• 수산경영론집
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• 제15권1호
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• pp.58-80
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• 1984

The classification of islands is prerequisite for establishing a development policy to vitalize many-sided function of islands. We try to classify the 440 inhabited islands which exist in Jeon-Nam area and Kyong-Nam area by means of PCA. PCA begins with making correlation matrix of orignal variables. From this matrix we can comprehend the rough relationships between two variables. Next, we look for the eigenvalues which are roots of characteristic equation of correlation matrix. The number of eigenvalues is equal to that of original variables. We choose the largest eigenvalue λ$_1$among them and then look for the eigenvector of correlation matrix corresponding to the largest eigenvalue. Linear combination of eigenvector obtained above and original variables is namely first Principal Component (PC). Using an eigenvalue criterion(λ$\geq$ 1), we choose 3 PCs in Jeon-Nam area and 2 PCs in Kyong-Nam area. But we decide to consider only two PCs in both areas to faciliate a comparative analysis. Now, loss of information is 31.7% in Jeon-Nam area and 26.64% in Kyong-Nam area. PCs extracted by preceding procedure have characteristics as follows. The first PC relates to aggregate size of islands in case of both areas. The second PC relates to income per household, factors of agricultural production and factors of fisheries production in Jeon-Nam area, but in Kyong-Nam area it means distance from island and income per household. A classification of islands can be attained by plotting component scores of each island in graph used two PCs as axes and grouping similiar islands. 6 groups are formed in Jeon-Nam area and 5 groups in Kyong-Nam area. The result of this study in kyong-Nam area accords with prior result of study.

• Asian-Australasian Journal of Animal Sciences
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• 제28권5호
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• pp.716-729
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• 2015

Small-scale household digesters have been promoted across Asia as a sustainable way of handling manure. The major advantages are that they produce biogas and reduce odor. However their disadvantages include the low recycling of nutrients, because digestate is dilute and therefore difficult to transport, and the loss of biogas as a result of cracks and the intentional release of excess biogas. In this study, life cycle assessment (LCA) methodology was used to assess the environmental impacts associated with biogas digesters in Vietnam. Handling 1,000 kg of liquid manure and 100 kg of solid manure in a system with a biogas digester reduced the impact potential from 4.4 kg carbon dioxide ($CO_2$) equivalents to 3.2 kg $CO_2$ equivalents compared with traditional manure management. However, this advantage could easily be compromised if digester construction is considered in the LCA or in situations where there is an excess of biogas which is intentionally released. A sensitivity analysis showed that biogas digesters could be a means of reducing global warming if methane emissions can be kept low. In terms of eutrophication, farms with biogas digesters had 3 to 4 times greater impacts. In order to make biogas digesters sustainable, methods for recycling digestates are urgently required.

• 디지털융복합연구
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• 제17권12호
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• pp.489-501
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• 2019

본 연구는 여성 1인 가구를 위한 성범죄 예방 어플리케이션을 제안하고자 한다. 여성 1인 가구의 현황, 김해시의 범죄 현황, 기존의 성범죄 어플리케이션을 분석한 뒤, 단독 거주하는 20~30대 여성 15명을 대상으로 문화적 조사(Cultural Probes), 맥락적 탐구(Contexture Inquiry) 등의 사용자 조사를 실시하였다. 이를 바탕으로 예비 사용자들의 행동 패턴, 특징을 상세히 수집하여 퍼소나 제작 후 어플리케이션 프로토타입을 제작해 최종적으로 사용자 평가를 진행하였고, 서비스 디자인 도구를 활용한 사용자 조사를 통해 얻은 인사이트는 어플리케이션 제작시 사용자 만족도 상승에 긍정적 영향을 미친다는 것을 확인하였다. 사용성 평가 결과를 토대로, 본 연구의 산출물인 성범죄 예방 모바일 어플리케이션을 심화 발전시켜, 1인 가구 여성에 대한 성범죄 예방을 위한 실제 제작 산출물을 제안하고 상용화를 진행하는 것이 후속 연구 과제이다.

• 가정과삶의질연구
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• 제21권1호
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• pp.61-72
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• 2003

This study examines the problematic fact that most housewives are excluded from receiving the benefits of the National Pension Plan in South Korea. The National Pension Plan assigns no value to housework or household production, which in turn discourages full-time housewives from participating voluntarily in the Plan. In this article, I propose to utilize Credit Splitting and Pension Sharing in order to take into account full-time housewives' economic contribution in the National Pension Plan. In this article, I also discuss the ranges and application methods of the Credit Splitting and Pension Sharing. For this study, I have analyzed the data of 11,967 unemployed married women living with spouses published in“Research Data on Everyday Life Time Usage”by the Korea National Statistical Office in 1999. The value of the full-time housewives' labor varies depending on the methods of estimation. However, all estimated values exceed the average value assigned to the housewives by the National Pension Corporation. It is clear that full-time housewives' unpaid labor contributes a great deal to the formation of household property and wealth, which is a valid reason for Pension Sharing and Credit Splitting. This article also provides logical factors to consider in the process of Pension Sharing and Credit Splitting, which can be used for developing computerized software to determine a full-time housewives' labor value at the time of divorce or for any other purpose.

• 한국정밀공학회지
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• 제22권12호
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• pp.70-76
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• 2005

It is known that natural awakening of us in the morning is due to stimulation of the reticular activation system through biological clock in the suprachiasmatic nucleus of hypothalamus by the morning sunlight. If we sleep at dark rooms without windows and so without morning sunlight, thus, it is not easy fur us to get up refreshingly in the morning. In this paper, we propose an automatic sunrise household lighting system that helps us fer getting up cheerfully in the morning even if we sleep in dark rooms without morning sunlight. The proposed lighting system is an embedded system that turns automatically on the electric lamp and makes it brighter and brighter coincidently with the actual sunrise. The proposed system is composed of a PIC microcontroller with flash memory, a real-time clock IC, a D/A converter, an amplifier, a dimmer unit, a light bulb, a display panel and a keyboard. The validity of the proposed intelligent lighting system is demonstrated via a prototype production and experimentation.

• 농촌지도와개발
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• 제24권1호
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• pp.1-8
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• 2017

The Purpose of this study is to predict farm size per farming household in Chungcheongnam-province by using the Markov chains and Quadratic Programming.. The results are as follows; First, small-scale farms with less than 1.0ha of land are predicted to be still more than half (of total farming households) in 2025 as well. Second, large-scale farms with 3.0ha-5.0ha land and extra large-scale farms with over 5.0ha of land are predicted to gradually expand their proportion in total farm scale. Third, middle-scale farms with 1.0ha-3.0ha land are forecasted to be reduced in their relative proportion. It is required to take into account regional characteristics to improve the effectiveness of a rice industry policy. Therefore, this study has some significance in attempting to research on the ownership structure of rice production areas in consideration of target regions.

• 노동경제논집
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• 제36권1호
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• pp.93-129
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• 2013

본 논문은 기혼여성의 취업으로 인해 발생된 소비패턴의 변화와 그로 인해 야기되는 산업별 산출액의 변화 및 노동수요 파생효과를 추정하였다. 분석 결과, 맞벌이가구 증가에 따라 교통비와 교육비, 외식비, 가사서비스 등의 소비가 증가하였다. 이러한 소비패턴 변화로 인해 교육 및 보건업, 음식 숙박업 등 시장서비스업의 노동수요 증가가 야기되었다. 특히 고학력 및 중산층 이상의 기혼여성의 취업 시 취업유발효과가 높았으며, 그로 인해 저숙련 업종의 노동수요를 파생시킬 것으로 추정된다.