• 한국시뮬레이션학회논문지
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• 제7권2호
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• pp.137-152
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• 1998

One of the components that constitute the simulation models is the state variables whose values are determined by the time related simulation process. Embedding rule-based expert systems into the simulation models should provide a systematic way of handling these time-dependent variables without distracting the essential problem solving capabilities of the expert systems which are well suited for expressing the decision making function of complex cases. The expert system, however, is inefficient in dealing with the time elapsing characteristics of target system compare to the simulation models. To solve the problem, this paper provides an interruptible inference engine whose inferencing process can be interrupted when the variables' value, which are used as the parameters of the rules, are not yet determined due to the time dependent nature of the state variables. The process is resumed when the variables are ready. The elapse of time is calculated by time-advance function of the simulation model to which the expert system has been embedded. The example modeling shown exploits the embedded interruptible inferencing capability for the controlling and monitoring of metal grating process.

• 산업경영시스템학회지
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• 제20권43호
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• pp.357-364
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• 1997

After the buyer purchases the product, the seller's role does not end. If the product fails to function properly before the end of the warranty period, the seller is responsible for its repair or replacement under the seller's warranty policy. There are two common types of warranty policies: the free replacement warranty and the rebate warranty. Under the free replacement warranty policy, replacement or repairs during the warranty period are provided by the seller free of charge to the buyer. Under the rebate warranty policy, a failed item is replaced by a new one or is repaired at a cost to the age of the failed item. The rebate warranty is most often used for items such as a battery or an automobile tire which wear out and must be replaced at failure. This paper proposes a easy way of estimating the warranty cost under the free replacement warranty policy assuming an exponential product failure function on repairable products.

• 가정과삶의질연구
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• 제20권6호
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• pp.69-79
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• 2002

The deteriorated apartments make a social problem in now a days. After all, a new alternative plan for deteriorated apartments such as the remodelling concept must be considered. This study aims to survey the perception levels among residents in deteriorated apartments relating to remodelling. It might be provide the basic data which could be used for the analysis of consumers in the future implementation of deteriorated remodelling projects. The analytical methods adopted in this study were factor analysis, 1-test, one-way ANOVA, post-hoc estimation(Scheffe test) by the SPSS 10.1 for Windows program. Through the factor analysis for the perception types regarding remodelling, the factors were named ‘function improvement orientation’ , ‘property value orientation’, ‘individual-household improvement orientation’, and ‘negative attitude to remodelling’. The analysis of the perception types regarding remodelling, by the family characteristics, socio-economic characteristics, residence characteristics, apartment block variables, resident's value orientation, and resident's satisfaction level, indicated that the perception degree of the ‘property value orientation’was the highest, followed by the ‘function improvement orientation’.

• 대한산업공학회지
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• 제18권2호
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• pp.109-121
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• 1992

In this paper, we address a layout design problem for determining a K-class-based dedicated storage layout in an automated storage retrieval system. K-class-based dedicated storage employs K zones in which lots from a class of products are stored randomly. Zones form a partition of storage locations. Our objective function is to minimize the expected single command travel time, which is expressed as a set function of space requirements for zones, average demand rates from classes, and one-way travel times from the pickup/deposit station to locations. We construct a heuristic algorithm based on analytical results and a local search method, the methodology deveolped can be used with easily-available data by warehouse planners to improve the throughput capacity of a conventional warehouse as well as an AS/RS.

• 호남수학학술지
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• 제40권4호
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• pp.785-794
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• 2018

In [8] they introduced a new finite element method for accurate numerical solutions of Poisson equations with corner singularities. They consider the Poisson equations with homogeneous Dirichlet boundary condition with one corner singularity at the origin, and compute the finite element solution using standard FEM and use the extraction formula to compute the stress intensity factor, then pose a PDE with a regular solution by imposing the nonhomogeneous boundary condition using the computed stress intensity factor, which converges with optimal speed. From the solution they could get an accurate solution just by adding the singular part. This approach uses the polar coordinate and the cut-off function to control the singularity and the boundary condition. In this paper we consider Poisson equations with multiple singular points, which involves different cut-off functions which might overlaps together and shows the way of cording in FreeFEM++ to control the singular functions and cut-off functions with numerical experiments.

• 한국컴퓨터정보학회:학술대회논문집
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• 한국컴퓨터정보학회 2022년도 제66차 하계학술대회논문집 30권2호
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• pp.681-683
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• 2022

본 연구는 수면의 질, 우울, 불안, 인지기능을 확인하고 이들의 상관관계를 알아보는 서술적 상관관계연구 연구이다. K도 G시, D시에 위치한 10곳의 경로당에서 65세 이상 일반노인 130명을 대상으로 설문조사를 통해 자료를 수집하였다. 수집된 자료는 SPSS WIN 20.0 프로그램을 이용하여 대상자의 일반적 특성의 빈도, 백분율을 산출하였고 대상자의 수면의 질, 불안, 우울, 인지정도의 평균, 표준 편차을 산출하였으며, 대상자의 일반적 특성에 따른 수면의 질, 불안, 우울, 인지정도를 t-test와 one-way ANOVA로 분석하였으며, 대상자의 수면의 질, 불안, 우울, 인지정도의 상관관계 검정은 Pearson's correlation coefficient를 실시하였다. 연구결과는 수면의 질, 불안, 우울, 인지기능의 상관관계는 불안과 수면의 질(p=-.422), 우울과 수면의 질(p=-.552)간에 유의한 음의 상관관계가 있는 것으로 나타났고, 불안과 우울은 유의한 양의 상관관계가 있는 것으로 나타났다. 노인이 지각하는 수면의 질과 우울, 불안, 인지기능의 정도를 파악하고 노인수면증진을 위한 간호중재 개발에 기초자료가 될 수 있을 것이다.

• International Journal of Internet, Broadcasting and Communication
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• 제16권4호
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• pp.402-408
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• 2024

Initializing blocks of a file is a frequently used function on computers. One of the simplest ways to initialize a file block is to open the file and initialize all data. This allows you to completely erase the data the file previously contained. In this paper, we design a system that initializes file blocks within a specific folder. When you specify a folder you want to initialize, the files in the folder are found, the file data is read, and the read data is initialized and saved in the file. In this way, all file blocks in a specific folder are initialized. The experiment was performed on the function proposed in this paper. As a result of the experiment, it was confirmed that initialization of file blocks in a specific folder worked normally.

• 한국산업정보학회논문지
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• 제21권1호
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• pp.51-59
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• 2016

방송 기술의 발전은 기존의 아날로그 방송을 디지털 방송으로 전환시켰고, 그 결과 다수의 프로그램을 다중화(Multiplexing)하여 하나의 스트림(Stream) 으로 송출하는 것이 가능해짐에 따라 아날로그 방식으로 방송할 때보다 채널 수가 많이 늘어나게 되었다. 다채널 시청 환경에서 시청자가 원하는 프로그램을 찾을 수 있게 도와주는 역할을 하는 것이 EPG(Electronic Program Guide)이다. 기존의 지상파 위주의 방송에서 케이블 TV, 위성 방송, IP TV 서비스까지 지원되는 다매체 환경으로 방송기술의 발전이 급속히 변화하고 있는 상황에서는 제목, 장르, 날짜, WishList로 프로그램을 검색하는 기능을 갖는 기존의 EPG 시스템으로는 사용자에게 불편함을 제공한다. 따라서 본 논문에서는 PSIP (Program and System Information Protocol)의 정보 변경을 활용하여 프로그램의 선호도에 따라 원의 크기가 다르게 표현되고, 프로그램 상영 시간이 임박해짐에 따라 표시된 화면이 진동되는 등의 직관적인 판단이 가능한 새로운 형태의 사용자 맞춤형 EPG 시스템을 구현하였다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2006년도 추계 학술논문 발표대회 논문집
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• pp.133-137
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• 2006

Can examine cause that the construction industry is faced in crisis of skill exhaustion in two sides. One is the tribe of actuality production manpower by entry evasion and graying of young man class specially new manpower to the tribe of skill manpower. Another is qualitative decline of skill manpower. Generally, problem of the systematic knowledge tribe and the picking up tribe about new technology etc, exists because learn skill for shoulder beyond in spot. In cutting phenomenon of skill that is depended on personal relationships availability with skilled worker in hereafter, problem that worker who is old or enter through rain skilled worker does not learn all life skill is detected. These problems institute entry of young man class and necessity of systematic vocational education training specially new human strength strongly. This study does presentation of way to promote construction industry entry of young man class and improvement way of vocational education training system that can do to train these by function manpower by purpose.

• 전기전자학회논문지
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• 제21권1호
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• pp.92-95
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• 2017

본 논문에서는 적은 면적의 GP-GPU에서 성능을 향상시키기 위한 방법을 제안한다. 본 논문에서는 superscalar와 같이 과도하게 스케줄링 복잡성을 증가시키지 않는 대신 단순한 코어의 수를 늘려 성능을 극대화 시키는 방법을 제안한다. GP-GPU를 구성하는 Stream Processor의 구조를 단순화한다. 또한, Warp Schedule에서 thread 할당을 어플리케이션에 적합한 방법을 개발하여 성능을 개선한다. 성능을 검증하는 방안으로 neural network의 한 분야인 딥러닝에 대한 스레드 할당방식을 제안한다. Neural Network 알고리즘의 경우 Intel CPU 대비 90%에서 ARM Cortex-A15 4 core 대비 98% 성능 향상을 확인할 수 있었다.