• 한국건설관리학회논문집
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• 제12권6호
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• pp.22-30
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• 2011

건설현장에서 구조물 시공시 흙막이는 터파기 기초보호와 작업공간을 제공하는 역할을 한다. 흙막이 공사는 지반 굴착, 지하수 처리, 파일링, 버팀보 설치 등 복잡한 토공사 공정을 가진다. 토공사의 성격상 지반 여건 등 주위 환경의 변화에 따라서 다양한 응력변화가 발생되고, 이러한 변화가 주어진 설계한도를 벗어나면 인명사고를 동반한 붕괴사고로 이어질 수 있다. 이와 같은 이유로 구조물 기초공사에서 붕괴사고는 건설공사시 가장 주의해야 할 분야 중 하나이다. 본 논문은 흙막이 시공시 안전을 향상시키기 위한 USN (Ubiquitous Sensor Network) 기반의 데이터 획득 시스템을 제시한다. USN 기반의 데이터 획득 시스템은 초음파 센서를 활용하여 흙막이에 대한 변위를 분석하고, USN 기술이 제공하는 실시간 데이터 송수신 기능을 활용하여 원격으로 흙막이 벽체의 안정 상태를 지속적으로 관찰하고, 필요시 적절하게 대응하도록 지원한다. 연구효과를 검증하기 위하여 센서와 USN 기술을 접합하여 흙막이 벽체의 변위실험을 진행했으며, 검증결과 USN 기반 데이터 획득 시스템은 변위 데이터를 측정하여 흙막이 시공시 안전성을 향상시킬 수 있다는 것을 보여준다.

• ETRI Journal
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• 제42권5호
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• pp.669-685
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• 2020

5G AgiLe and fLexible integration of SaTellite And cellulaR (5G-ALLSTAR) is a Korea-Europe (KR-EU) collaborative project for developing multi-connectivity (MC) technologies that integrate cellular and satellite networks to provide seamless, reliable, and ubiquitous broadband communication services and improve service continuity for 5G and beyond. The main scope of this project entails the prototype development of a millimeter-wave 5G New Radio (NR)-based cellular system, an investigation of the feasibility of an NR-based satellite system and its integration with cellular systems, and a study of spectrum sharing and interference management techniques for MC. This article reviews recent research activities and presents preliminary results and a plan for the proof of concept (PoC) of three representative use cases (UCs) and one joint KR-EU UC. The feasibility of each UC and superiority of the developed technologies will be validated with key performance indicators using corresponding PoC platforms. The final achievements of the project are expected to eventually contribute to the technical evolution of 5G, which will pave the road for next-generation communications.

• 한국건설관리학회논문집
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• 제4권3호
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• pp.146-152
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• 2003

건설프로젝트에 있어서 공사감독은 공정관리, 품질관리 안전관리, 원가관리에 중요한 영향을 미친다. 그러므로 건설공사의 초기단계에서부터 감독의 지속적인 관리활동이 필요하다. 그러나 국내 공공 건설공사에서 감독의 업무량과 비용에 대한 평가가 미비한 실정이다. 또한 공사 감독이 초기단계에서부터 지속적인 관리활동이 가능한지에 대해서도 회의적인 시각이 상존하고 있다. 본 연구에서는 우리나라 공공발주처에서 시행하는 공사의 감독 업무와 외국에서의 공사감독의 관리활동을 비교$\cdot$분석하였다. 또한 국내 건설공사에서 감독에 소요되는 비용과 감독을 대체한 감리원을 활용하였을 때의 비용을 평가하였다. 이를 통하여 향후 감독업무의 개선이 가능하고 비용적 측면에서 인건비 등 공사 간접비의 절감을 기할 수 있겠다.

• 한국유기농업학회지
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• 제3권1호
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• pp.43-70
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• 1994

Presently the concept of organic farming has not simply technical categories such as no agricul-tural chemicals and no chemical fertilizer but can be also extended to the categories of economics, food nutrition, environmental and philosophical aspects. Accordingly, in order to understand cor-rectly organic farming, it is necessary to look into the concept including these extended aspects. So the production and consumption activities of organic farming products are largely based on the fundamental philosophy of organic farming. That is, all the life that is included in an ecosystem has to live in symbiosis, which is based on life circulation principle. And if this circultaion system is destroyed, human life may be threatended. Farmers who produce organic farming prducts(organic farmer) receive price higher than general farmers. This study shows the gap of 46.9% in two products. Also, since the price of organic farming products is fluctuated less relatively, Organic farming pruducts can be competed against imported agricultural products in terms of food safety. And organic farming should be managed by crop rotation and composite farm management upon which the principle of material circulation is worked. This composite management is devided into 2 classes, which are individually livestock-have-composite management and regional composite management. These management method means that organic materials are crucial to maintain the structure and fertility and these organic materials are easily obtained from animal as by-products.

• The Korean Journal of Pain
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• 제31권4호
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• pp.235-243
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• 2018

Postherpetic neuralgia (PHN) is the most troublesome side effect of Herpes Zoster (HZ), which mainly affects the elderly and immunocompromised populations. Despite the current advancement of treatments, PHN persists in many individuals influencing their daily activities and reducing their quality of life. Anticonvulsants, antidepressants, topical therapies including lidocaine and capsaicin, and opioids, are the most widely used therapies for the treatment of PHN. These medications come with their adverse effects, so they should be used carefully with the elderly or with patients with significant comorbidities. Other measures like botulinum toxin, nerve blocks, spinal cord stimulation, and radiofrequency have also contributed significantly to the management of PHN. However, the efficacy, safety, and tolerability of these invasive methods need to be carefully monitored when administering them. Early diagnosis and early initiation of treatment can reduce the burden associated with PHN. The zoster vaccine has effectively reduced the incidence of HZ and PHN. In this article, we discuss the treatment options available for the management of PHN, mainly focusing on the efficacy and safety of different therapeutic modalities.

• 대한안전경영과학회지
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• 제22권3호
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• pp.61-68
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• 2020

This study aims to determine the correlation between the apartment resident community and housing satisfaction and suggest which factors can contribute to improving the local community's housing environment and satisfaction by means of the local inhabitants and apartment residents participating in co-managing the community. The study results are as follows. Firstly, the apartment resident community had a positive effect on housing satisfaction but the effects were insignificant. This revealed that residents' interest in communicating with the resident community was low due to various organizations such as the women's association, election committee, and autonomous society being used as means to pursue personal gain rather than the development of the entire apartment. Secondly, the vitalization of the apartment resident community had a positive effect on housing satisfaction. The analysis results showed that the higher the level of unity and volunteering activities of residents, the more improved the resident vitalization programs are being managed, and the higher the level of resident participation, the higher the housing satisfaction. Lastly, this study suggests the supplementation and upgrading of apartment community facilities into complex community facilities as a means to unify the residents and vitalize the resident community. To vitalize the resident community and strengthen the community spirit, the residents will need to voluntarily create a community hub by forming community-tailored associations and programs through connections with local governments and businesses.

• 대한안전경영과학회지
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• 제14권3호
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• pp.119-126
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• 2012

Recently, the breakdown of online banking servers and the leakage of customer information give rise to much concern about the security of information systems in financial and banking companies in Korea. The enforcement of security for information system becomes much more important issue than earlier. However, the security reinforcement of information system is restricted by a budget. In addition, the activities' cost to secure information system from threatening are under uncertain circumstances and should be established by a human decision maker who is basically uncertain and vague. Thus, making the budget for information system is exposed to any extent of the risk for these reasons. First, we introduce brief fuzzy set theory and fuzzy AHP (Analytic Hierarchy Process) methodology. Then, the cost elements that comprise yearly budget are presented and the priorities among the cost elements are calculated by fuzzy AHP. The cost elements that are exposed to risk are evaluated from the both perspectives of the risk impact and risk occurrence possibility which are expressed as linguistic terms. To get information on the risk profiles-pessimistic, most likely, and optimistic-for each cost element, the evaluation is accomplished and the result is presented. At last, the budget ranges-minimum, mode, maximum-for each cost element are estimated with the consideration of the risk profiles.

• 대한안전경영과학회지
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• 제14권2호
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• pp.265-276
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• 2012

The purpose of this study is to draw employee support program at the company level through field survey of foreign laborers' satisfaction level of working life. To analyze the factors that determine working life satisfaction, regression analysis was conducted. Satisfaction level of working hours(t=2.469), living environment(t=2.140), post offices/banks (t=3.024) showed a statistically significant. Also these variables, working hours, living environment, post office/banks are verified to be very important for improving the level of their working life. Through these findings we can understand that employee support activities, providing user-guide of bank and post office, compliance with standards for working hours, improvement of the living conditions (accommodation, meals, etc.), the leisure time program support, the children care support and active utilization of foreign workers and strengthen the educational program, are necessary to improve the satisfaction level of foreign laborers' working life in Korea. It is recommended that managers need to recognize that careful consideration of living and working condition could contribute to stable settlement and increase working life satisfaction for the foreign workers at company level.

• 대한안전경영과학회지
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• 제21권4호
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• pp.67-74
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• 2019

Visual inspection is regarded as one of the critical activities for quality control in a manufacturing company. it is thus important to improve the performance of detecting a defective part or product. There are three probable working modes for visual inspection: fully automatic (by automatic machines), fully manual (by human operators), and semi-automatic (by collaboration between human operators and automatic machines). Most of the current studies on visual inspection have been focused on the improvement of automatic detection performance by developing a better automatic machine using computer vision technologies. However, there are still a range of situations where human operators should conduct visual inspection with/without automatic machines. In this situation, human operators'performance of visual inspection is significant to the successful quality control. However, visual inspection of components assembled into a mobile camera module belongs to those situations. This study aims to investigate human performance issues in visual inspection of the components, paying more attention to human errors. For this, Abstraction Hierarchy-based work domain modeling method was applied to examine a range of direct or indirect factors related to human errors and their relationships in the visual inspection of the components. Although this study was conducted in the context of manufacturing mobile camera modules, the proposed method would be easily generalized into other industries.

• Journal of Nuclear Fuel Cycle and Waste Technology
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• 제1권1호
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• pp.9-27
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• 2013

Nagra was established in 1972 by the Swiss nuclear power plant operators and the Federal Government to implement permanent and safe disposal of all types of radioactive waste generated in Switzerland. The Swiss Nuclear Energy Act specifies that these shall be disposed of in deep geological repositories. A number of different geological formations and sites have been investigated to date and an extended database of geological characteristics as well as data and state-of-the-art methodologies required for the evaluation of the long-term safety of repository systems have been developed. The research, development, and demonstration activities are further supported by the two underground research facilities operating in Switzerland, the Grimsel Test Site and the Mont Terri Project, along with very active collaboration of Nagra with national and international partners. A new site selection process was approved by the Federal Government in 2008 and is ongoing. This process is driven by the long-term safety and feasibility of the geological repositories and is based on a step-wise decision-making approach with a strong participatory component from the affected communities and regions. In this paper a brief history and the current status of the Swiss radioactive waste management program are presented and special characteristics that may be useful beyond the Swiss program are highlighted and discussed.