• 융합보안논문지
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• 제22권1호
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• pp.71-79
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• 2022

정보기술과 전력 공급 시스템을 결합하여 전력 공급자와 소비자 간의 실시간 정보 교환을 통해 에너지 효율을 극대화하는 스마트 그리드 시스템이 등장했다. 중앙 클라우드 서버와 스마트 그리드 IoT 기기 사이에서 전력 관련 정보 수집 및 데이터저장 처리하는 엣지 서버를 활용하여 스마트 그리드 시스템을 위한 블록체인 기반의 사용자 인증 기법이 제안되고 있다. 최근, 스마트 그리드 환경에서 보안을 강화하기 위해 인증 방식이 제안되고 있지만 여전히 많은 취약점이 보고되고 있다. 본 논문은 블록체인을 이용한 엣지 컴퓨팅 기반의 스마트 그리드에서 사용자의 프라이버시와 익명성을 보장하기 위한 새로운 상호 인증 기법을 제시한다. 제안된 방식에서는 키 자료 업데이트 및 폐기와 같은 키 관리의 효율성을 위해 스마트 계약을 사용합니다. 마지막으로 제안하는 기법이 사용자의 스마트 그리드-IoT 기기와 에지 서버 간의 세션 키를 안전하게 설정함과 동시에 익명성을 보장함을 증명한다.

• 디지털융복합연구
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• 제17권7호
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• pp.131-138
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• 2019

전 세계 전력 생산 에너지의 비율은 석탄이 40%, 천연가스 20%, 수력 16%, 원자력 15%, 석유 6%로 모두가 환경오염을 유발하는 에너지다. 또한 화석연료는 지구상에 자원의 편중이 심하기 때문에 가격과 공급면에서 심각한 문제를 야기한다. 이러한 문제로 화석 연료를 대체하게 될 차세대 친환경 에너지로써 태양광 에너지가 각광 받고 있다. 이에 본 연구에서는 국내 공단에 Test-Bed를 선정하여 수용가의 대응용 태양광 ESS 시스템 적용함에 있어 Peak-cut 운영을 위한 Charge Operation Plan과 Discharge Operation Plan 운영방안을 최대수요전력 감소 시뮬레이션을 통해 검증하고자 한다. 이를 위해 전력사용량이 가장 많은 11월부터 2월의 전력사용량을 선정하여 Charge/Discharge Logic을 적용했다. 본 논문에서 제시한 충전/방전 로직에 따른 시뮬레이션 결과, ESS Peak-cut 서비스 이후의 최대수요전력이 감소하였으며 Peak-target 전력의 50%로 감소함에 따라 계약전력 또한 감소함을 알 수 있다. 이를 통해 계약전력 감소는 해당 수용가의 기본 전력 값을 감소시켜, 경제적 우월성을 기대할 수 있을 뿐만 아니라 전기품질 향상 및 전력공급시스템의 안정화에도 기여할 수 있을 것으로 판단된다.

• 수산경영론집
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• 제31권1호
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• pp.115-133
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• 2000

The policy of suppling tax-exempt fishery oil in Korea has a history of almost 40 years, which was initiated by the National Federation of Fisheries Cooperatives in 1965. In 1999 the volume of fishery oil supplied to the earning fishermen and fishing entrepreneurs amounted to 8,390 thousand DM, 500 billion won in total. This paper analyzes the oil supplying system to fishermen in Korea and shows that the structural obstacles to the stable provision of fishery oil lies in the ineffective bargaining power (fixing price). Provided that the NFFC as a buyer, which is not equipped with the storage facilities for oil bids for a unit-price contract of fishery oil, there exists a possibility of collusion among 5 local oil refineries corporations to influence the oil price, making it difficult to reach a resonable price of oil. Though the international bids and direct imports following the liberalization of oil imports would help lower the unit price, purchasing and importing the oil out of season at a lower price would not be guaranteed without the oil storage facilities. Furthermore, the current supply system of oil is quite vulnerable to the extraneous factors and, say when the oil price soars unpredictably, it is almost impossible to supply low - priced fishery oil to fishermen. The National Federation of Fisheries Association of Japan(Zengyoren), for instance, possesses 10 oil storage facilities, which had been built across the country during the last 20 years (1964-1984). The storage capacity of these facilities reaches 0.6million DM(by kind, 0.56million DM for A heavy oil, 38thousand D/M kerosene, 5thousand D/M for diesel fuel oil). Allowing no intermediary of production associations(fisheries cooperatives) the NFFA's capacity for keeping oil in reserve rises much higher. As these storage facilities can keep the oil amounting to as much as of 70 days demand in reserve, a stable supply of fishery oil on favorable terms is secured. In contrast with Japan case, unequipped with the storage facilities for fishery oil, Korea does not have much bargaining power for bringing down the price of fishery oil. To make matters worse, the oil storing capacity of the member cooperatives is the volume of only 8 days demand. In case the oil price rises, it is almost impossible to supply the oil to the fishermen at a price lower than the price risen.

• 한국가금학회지
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• 제20권2호
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• pp.107-114
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• 1993

The structure change in the broiler industry of Korea has been taking place very rapidly toward the direction of integrated production and marketing system. During the course of the evolution into the integrated structure, however, a number of small business entities, uncountable nationally but a minimum of a dozen, that previously engaged in the supply of production factors or live bird transaction also tended to get involved in the new system as a disguised or pseudo-integrator, having brought a lot of problems not only to the farmers but also to the development of integrated structure. The pseudo-integrator is generally characterized by limited functions in such a way of supplying chicks and feeds to and collecting grown birds from farmers under the contract at a fixed farmer's payment in practically the same pattern as a partial or quasi-integration, which intends to act as if an integrator in a stratagem to simply enjoy a margin simply from selling supplies and buying products for a certain period of time. The grower making a contract with appears to be a farmer who used to be an Independent and speculating but not able to join in the normal system of evolving integration. The problems of a pseudo-integrator center on the financial loss to a contract farmer, because the falsified integrator has to become easily bankrupt and run away when the price of live broiler continually stays below the cost of production, even though he is able to make a tremendous profit otherwise which is the real purpose of the operation for. It is true that the volatile market, fluctuating the price up more than doubled in a month and down to a half in a few weeks, makes the pseudo-integrator find the room for such a fraudulence. In addition, its activity also adversely affect the evolution of the integration due to rather negative image on structure change in general. It is recommended that the farmers need to better understand the real picture of the integrated system so as not to be swindled by a disguised, small scale agribusiness agent. By the same token, it is also equally required to have the whole industry integrated completely as early as possible. The Joint effort to get rid of pseudo-integrators' problems shall be put for the industry development moving toward the integration. No doubt a pseudo-integrator must be a temporary player for chance emerging during the course of structure change into the integrated, though.

• 한국건설관리학회논문집
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• 제13권6호
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• pp.153-164
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• 2012

2008년 세계 금융위기를 계기로 국내 주택시장의 가격정체와 전세가격의 상승이 오랫동안 지속되고 있다. 전세가격의 지속적인 가격 상승은 대부분 사회초년생 및 무주택자가 선호하는 거주지인 전세주택에 있어 가격 상승으로 인하여 이들의 직접적인 거주 위협이 된다는 점에서 사회적 문제로 대두되고 있다. 정부는 다양한 정책을 통하여 이러한 전세가격의 안정과 무주택자의 거주지 안정을 위해 노력하고 있지만, 주택시장과 전세시장내의 구조적 이해관계에 대한 인식 부족으로 정책의 효과를 제대로 보지 못하고 있다. 이에 본 연구는 주택시장을 포함한 전세시장의 작동원리를 시스템 다이내믹스를 통하여 분석하고, 이를 바탕으로 정부의 전 월세 정책을 분석하였다. 분석결과 정부의 전월세 대책은 전세시장이 주택시장과 연결되어있다는 시각이 부족하고, 전세보증금의 지원이나, 임대인 세제지원 등의 단기적 미봉책 위주로서, 주택시장의 수요 공급 안정화를 전제로 하는 전세시장 공급 확대에 큰 영향을 미치지 못한다.

• 한국조리학회지
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• 제18권3호
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• pp.46-57
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• 2012

본 연구는 대구 경북지역의 위탁급식업체 조리종사자를 대상으로 식자재구매시스템 인지가 종사원의 직무만족과 비재무적 성과에 미치는 영향을 분석하고자 하였다. 이를 위해 편의추출법을 이용하여 2008년 11월 15일부터 12월 14일(30일)까지 설문지 총 230부를 배포하여 197부(85%)의 설문지가 분석에 사용되었다. 자료처리는 SPSS 14.0 통계패키지를 이용하여 빈도분석, 신뢰도분석, 요인분석을 실시하였으며 가설검증은 다중회귀분석을 통하여 검증하였다. 연구결과를 요약하면 다음과 같다. 첫째, 가설1 식자재구매시스템 인지요인은 직무만족에 영향을 미치는 것으로 나타났으며, 하위가설1-2 식자재의 중요성 인식은 직무만족에 유의성이 나타났다. 둘째, 가설2 식자재구매시스템 인지요인은 비재무적 성과에 영향을 미치는 것으로 나타났으며, 하위가설2-2 식자재구매시스템 인지요인과 2-3식자재의 원활한 수급은 비재무적 성과에 유의성이 나타났다. 셋째, 가설3 위탁급식업체 조리종사자의 직무만족은 비재무적 성과에 영향을 미치는 것으로 나타났다. 따라서 위탁급식업체조리종사자들의 식자재구매시스템 인지로 그들의 긍정적 태도유발은 바람직한 기업성과로 나타날 수 있을 것이다.

• 의료법학
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• 제13권2호
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• pp.79-113
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• 2012

This study focuses on the protection of trial subjects, who participate in clinical trials for new drug. It takes long time to develop new drugs and the clinical trials are required. Usually, pharmaceutical company, which develop new drug, request a research institution(usually, hospital) to investigate the examination of security and side effects of new drug. The institution recruit trial subject to participate in the trials. The contract for clinical research of investigational new drug is concluded between the pharmaceutical company and the institution. This thesis studies the legal regulations for protection of participants of clinical research for new drug. In this respect the first matter of this study is to seek which relation between pharmaceutical firm and participants of clinical trials. Especially, there is a question which the trial subject is entitled to demand the pharmaceutical company which requested clinical trials the institution to supply the investigational new drug, after the contract for clinical trials had terminated or cancelled. This study take into account the liability of the pharmaceutical company to trial subject. Secondly, it is researched the roles and authority of Institutional Review Board(IRB). IRB is Research Ethics Committee of the institution, in which clinical trials for new drug are conducted. According to the rule of Korea good clinical practice(KGCP), IRB is the mandatory organization which is authorized to approve, secure approval or disapprove the clinical trials for investigational new drug in the institution. The important roles are the review of ethical perspective of trial research and the protection of trial subject. Thirdly, this paper focuses if the participants are to be paid for the participation for clinical research. This is ethical aspect of clinical trials. It is resonable that the participant is reimbursed for expenditure such as travels, and other expenses incurred in participation in trials. It is not allowed that the benefit of clinical trials is paid to trial subject. The payment should not function as financial inducements for participations of trials. Finally, the voluntary consent of the trial subject is required. The institution ought to inform the subject, who would like to participate in trials, and it ought to received informed consent in writing for subject. In this regard, it is matter that trial subject has ability of consent. It is principle that the subject as severely psychogeriatric patient has not ability of consent. However, it is required that not only healthy people but also patients are allowed to take part in clinical trials of new drug, in order to confirm which the investigation new drug is secure. Therefore there are cases, in which the legal representative of subject consent the participation of the trials. In addition, it is very important that the regulations concerning clinical trials of new drug is to be systematically well-modified. The approach of legal and political approach is needed to achieve this purpose.

• 한국식품영양학회지
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• 제20권2호
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• pp.226-239
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• 2007

The purpose of this study was to identify the problems related to the purchasing processes of school foodservices that should be corrected for the food service safety, by examining the purchasing processes and the status of supplier selection. A questionnaire was given to 300 dietitians working at self-operated food services. Ninety-eight responses, excluding incomplete answers, were used for the statistical analysis. The survey consisted of three parts: the general characteristics of the school foodservice and dietitian, purchasing processes and supplier selection, and the purchase specifications. We found that 84% of the contract was made by informal purchasing, and the contract period was 6 months or one year. For supplier selection, problems related to the document screening systems were the superficiality of the content(45.7%) and the absence or lack of clarity of the appraisal criteria(34.8%). The important factors for the facility and equipment standards of suppliers were included unclear evaluation methods for content(41.1%) and inappropriate appraisal lists(21.1%), while unclear evaluation methods for content(41.9%) and absence or lack of clarity of the appraisal criteria(20.4%) were the problems pertaining to the supplier evaluation checklist. When using the Food Labeling Standards to select suppliers, confirmation of the sell-by date and the storage method had the highest score at 3.85 out of 5. For supplier selection, only 25% of the contract was made by using the purchase specifications. The levels of satisfaction of with Kimchi and rice cakes suppliers were significantly different according to employment type and educational background, respectively. Depending on working experiences, satisfaction was significantly different for the use of document screening, as a standard for the selection and management of suppliers, and for the facility and equipment standards of suppliers, The use of purchase specifications was different by employment type, while the use of purchase specifications for contracts was different by working experience. These results imply that the specialization of suppliers is necessary to unsure food safety. Therefore, the objective methods to evaluate the suppliers should be developed by the government, and appropriate education programs for dietitians should be prepared to enhance the utilization of purchase specifications.

• 무역학회지
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• 제42권1호
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• pp.69-97
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• 2017

FTA협정의 원산지 조사에 대한 기존연구는 수출업자의 위험관리 방안에 대해 분석하고 있는 반면, 본 연구는 수입자에게 발생할 수 있는 원산지 조사 리스크를 통제 가능한 위험과 통제 불가능한 위험으로 구분하고, 그 위험을 사례와 판례 분석을 통해 실증적으로 검증하고자 한다. 이를 위해 본 연구는 최근 5년 동안 관세청의 원산지 조사 위반의 현황, 2016년 8월 대법원 판례 및 고등법원과 조세심판원의 판례를 분석하여 원산지조사에 대한 수입자의 위험을 유형별로 검증해보았다. 수입자의 통제 가능한 위험의 관리방법으로서 FTA협정에 대한 실무적 지식, 회사차원의 원산지관리시스템을 갖추어야 하며, 납세자의 권리보호제도를 활용해야 한다. 한편, 수입자의 통제 불가능한 위험에 대한 관리방안으로서 무역 매매계약서에 매도인의 책임을 명기하는 것이 필요하지만, 실제 매도인과 매수인의 역학관계, 매도인의 계약위반기준에 따라 관리 가능 여부가 달라진다. 원산지조사에 대한 수입자의 통제 불가능한 위험은 완전히 제거할 수 없는데, 이는 FTA협정 상대국 수출업자와 관세당국의 귀책사유로 인한 규정 위반에 대해 수입자의 피해를 배상 청구할 방법이 없기 때문이다.

• Journal of Korea Trade
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• 제25권1호
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• pp.152-168
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• 2021

Purpose - This paper has an objective to suggest reasonable criteria in choosing Incoterms 2020 rules for efficient and effective logistics management in that the Incoterms rules affect not only the rights and obligations of the parties to the sales contract but also the control and management of logistics system and transaction costs in the transaction. Design/methodology - An analysis of the various factors is needed to assess the positive or negative impact on global value chain in choosing Incoterms rules from a total logistics view. This study analyzes the impact of which the content of individual incoterms rules can have on the operation of international logistics systems under the global value chain from a strategic perspective to suggest reasonable criteria for selection of Incoterms rules depending on the transaction situation. Findings - Results of this study shows that consideration of various aspects which includes the characteristics of the products, logistics capabilities, infrastructure, transaction volume, operational cost, customs regulations, tax and accounting should be reflected in choosing the appropriate Incoterms rules. Therefore, in order to minimize the total cost and improve logistics performance, it may be helpful to develop a decision support model which allows users to select appropriate Incoterms rules based on various influencing factors. Originality/value - This Study is different from previous research which has mainly focused on the rights and obligations of the parties to the transaction regarding the transfer of risks and costs under the Incoterms. In addition, this study has significance in that it provides implications for export and import companies that can be able to use Incoterms as a strategic tool to efficiently manage the global value chain and improve supply chain performance.