• 대한안전경영과학회지
• /
• 제7권4호
• /
• pp.219-227
• /
• 2005

Three general algorithms for evaluating the reliability for complex bridge system are proposed. These methods, such as Keystone, Boolean, Network algorithms are powerful and effective to derive an reliability expression for many practical complex systems. The combination approach of RBD and FTA proposed in this paper provides an effective way to evaluate the functional dependency for applications of FMEA.

• 보건행정학회지
• /
• 제17권1호
• /
• pp.75-93
• /
• 2007

This research purposed to analyse the diversity of the long-term care system based on the dependency/independency of the aged. For this purpose, we divided the long-term care systems to three components; form of benefit, generosity of benefit and delivery system. Form of benefit is whether the benefit is cash or in-kind, and the generosity of benefit is related to the level and coverage of benefit. The last concerned to focus on provider and user selection. According to this, we tried to make an ideal type of long-term care in the perspective of citizenship and consumerism. As a result, we established four types of long-term care system; active citizen type, passive citizen type, latent citizen type, and family dependent type. And we investigated Austria, Sweden, Germany and Korea for each type empirically.

• 정보관리학회지
• /
• 제32권4호
• /
• pp.223-247
• /
• 2015

본 연구는 대학생들의 개인적 특성이 도서관 모바일 이용도와 도서관 모바일 콘텐츠 이용 패턴에 어떤 영향을 미치는지 살펴보았다. 개인적 특성의 변인들로는 대학생의 성별, 전공, 학년, 대학, 인지된 유용성, 개인적 혁신성 및 스마트폰 의존도를 사용하였다. 설문 조사는 두 개의 대학들의 학부생 309명을 대상으로 진행하였다. 조사 결과, 전공, 학년, 인지된 유용성 및 개인적 혁신성은 모바일 이용도에, 그리고 성별, 전공, 대학 및 스마트폰 의존도는 모바일 콘텐츠 이용 패턴에 유의미한 영향을 미쳤다. 끝으로 이러한 연구 결과를 반영하여 효율적인 대학도서관 모바일 구현을 위한 방안들을 제안하였다.

• 한국정보처리학회논문지
• /
• 제7권7호
• /
• pp.2196-2203
• /
• 2000

As processor's operational frequency increases and processors execute multiple instructions per cycle, the processor performance becomes more dependent on the load operand referencing latency and the data dependency. To reduce the operand fetch latency and to increase ILP by breaking the data dependency, we propose a value-address hybrid predictor using a reasonable size prediction buffer and analyse the performance improvement by the proposed predictor. Through the extensive simulation of 5 benchmark programs, the proposed hybrid prediction scheme accurately predicts 62.72% of all loads which are 12.64% higher than the value prediction scheme and show its cost-effectiveness compared to the address predition scheme. In addition, we analyse the performance improvement achieved by the stride management and the history of previous predictions.

• 대한산업공학회지
• /
• 제37권3호
• /
• pp.264-270
• /
• 2011

A new method for creating a logical data model is proposed. The logical data model developed by the method defines table, primary key, foreign key, and fields. The framework of the logical data model is constructed by modeling the relationships between events and their related entity types. The proposed method consists of a series of objective and quantitative decisions such as maximum cardinality of relationships and functional dependency between the primary key and attributes. Even beginners to database design can use the methology as long as they understand such basic concepts about relational databases as primary key, foreign key, relationship cardinality, parent-child relationship, and functional dependency. The simple and systematic approach minimizes decision errors made by a database designer. In practial database design the method creates a logical data model in Boyce-Codd normal form unless the user of the method makes a critical decision error, which is very unlikely.

• 한국철도학회:학술대회논문집
• /
• 한국철도학회 2008년도 추계학술대회 논문집
• /
• pp.331-336
• /
• 2008

Magnetic path direction in the back-iron of a linear induction motor(LIM) is perpendicular to that of the lift-magnet of the MAGLEV which is recently developing in KOREA. In general the back-iron is isolated magnetically in conventional rail in order to eliminate the thrust dependency of the LIM on the lift force. However the magnetic isolation causes some increase in construction and management cost. So a unit-type rail system is considered, which the magnetic circuit of the back-iron is sharing that of the lift-magnet. In this paper 3-dimensional analysis for the lift-magnet is carried out using finite element method. As a result, a new shape of the unit-type rail is presented to reduce the magnetic dependency between thrust force and lift force. Also the distribution of magnetic flux density vectors and current-lift force characteristics are presented.

• Asia pacific journal of information systems
• /
• 제33권3호
• /
• pp.573-602
• /
• 2023

The smartphone is a necessary communication and productivity tool. Unlike other neutral, utilitarian technologies, smartphones are also a social display of wealth, i.e., of conspicuous consumption. Behavior around necessity and conspicuous goods are normally separate research tracks, and we can find no studies for technology products that exhibit both traits. We therefore propose a four-factor model that explains conspicuous consumption of "necessary" smartphones: dependency, social influence, the need for social connection, and convenience, in the United States, Mexico, and the Philippines. This paper provides confirmatory support for extant literature of the four constructs; it demonstrates the viability of the survey instrument across countries; and it shows similar effects among country models. Our structural model results imply the borderless nature of smartphone conspicuous consumption.

• 디지털융복합연구
• /
• 제11권9호
• /
• pp.103-111
• /
• 2013

SCM의 관리 포인트가 공급중심에서 수요관리 중심으로 옮겨짐에 따라, 정확한 수요 예측을 위한 많은 기법들이 제시되어 왔다. 이 중 변수간의 인과관계 분석을 통한 수요예측이 많이 이루어지고 있음에도 불구하고, 연관된 변수들 간의 상관구조는 상관계수에 의존하였고, 이는 예측의 정확성을 저하시키는 요인으로 작용하였다. 본 논문에서는 기존 방법의 문제점들을 보완하며, SCM에서 발생하는 Heavy Tail형 데이터의 상관구조를 정밀하게 모델링할 수 있는 방법을 제시한다. 상관구조를 파악할 수 있는 프레임웍인 코플라 함수 중에서 Student's t-코플라 함수를 통하여 수요 예측모형을 수립하고, 관련 파라미터를 추정하는 기법을 실험과 함께 제시하였다. 이를 통해, 수요예측에 필요한 변수들 간의 상관구조 파악이 보다 명확해지며, 이는 SCM상의 채찍효과의 완화로 이어져, 안정된 공급 사슬 네트웍의 관리에 기여할 것으로 기대된다.

• 한국병원경영학회지
• /
• 제4권2호
• /
• pp.305-329
• /
• 1999

Financial ratio indicators of the 46 sample hospitals provided by the Korea Health Industry Development Institute, together with the survey data responded by the 57 sample hospitals, were analysed to identify the characteristics of the red-figured hospitals' financial structure, financial operational efficiency and management decision-making behavior, The financial characteristics identified through the analysis include high dependency to liabilities, high salary expenses and overhead costs, low profitability of the unduly large amount of fixed assets, and low managerial efficieny of inventory. The hospitals, in face of the IMF economic impasse, took the necessary decision-making and counter measures to cut down salary expenses, to increase the number of patient and medical revenue, and to reduce investment to fixed assets. Based on these findings this study suggested that the hospitals should take more active cost containment measures, financial structural reorganization, and developoment of the strategies that can contribute to increase of the number of patient and medical revenue and that do not. require much capital funds.

• 한국경영과학회:학술대회논문집
• /
• 대한산업공학회/한국경영과학회 2000년도 춘계공동학술대회 논문집
• /
• pp.122-125
• /
• 2000

The Analytic Hierarchy Process (AHP), a decision making model, which is more applicable than other methods to R&D project selection, particularly when it is applied to intangibles. The objective of this paper is to develop an extended model of the AHP which Is linked to Cross Impact Analysis to assist in the ranking of a large number of technological alternatives. In this study, we developed a priority setting algorithm which considers the cross-impact of the future technology alternatives and thus developed an integrated cross-impact hierarchical decision-making model, which sets the priority by considering technological forecasting and technology dependency