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Mathematical modeling approach for classroom assignment problem (수리적 모델링을 통한 강의실 배정문제 해법에 관한 연구)

  • Ahn, Namsu
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.18 no.10
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    • pp.580-587
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    • 2017
  • Recently, as the education population of Korea has been rapidly declining, many changes have been taking place in the university environment. Especially, community colleges linked to local communities have responded to these crises through various educational changes, such as three-year study transfers, work-parallelism, and employee commissioned education. However, such changes in the contents of education are causing a new type of classroom allocation problem, in which it is difficult to assign the limited number of classrooms to the major courses. In this paper, we classified the constraints involved in assigning classrooms into absolute constraints and relative constraints, mathematically modeled them, and allocated the classrooms optimally through optimization software. The results were satisfactory and enabled us to obtain superior results in terms of the various performance indices (classroom utilization rate, teacher satisfaction, etc.) than when assigning classrooms in the normal way.

Mental Confliets Urban Korean Housewives A Qualitative Analysis of 20 Interviews (도시주부의 갈등에 대한 실사례분석 연구-20명의 심층면접을 중심으로-)

  • Jo, Yeong-Suk
    • The Korean Nurse
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    • v.28 no.3
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    • pp.83-93
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    • 1989
  • This study analysed marital comflicts, related factors, and adjustments to those conflicts described by urban Korean women. The purpose was to discover directions for resolution that would enhance the helpfulness of volunteers or prfessionals working with women in counselling settings. The investigator interviewed 20 married women, all mothers and housewives living in Seoul, attending marriage encounter programs and the Lifeline telephone counselling service. An interview schedule using six open-ended questiona guided the data colleciton which took place between May 31 and December 29, 1988. Content analysis of the data revealed, in order of reported frequency, the following areas of conflict: relationships between husband wife, relationships with children, relationships between the wife and her mother-in-Law, unsatisfied sexual needs, the husband's extra marital relationships, lack of self actualization and finacial matters. Analysis of the data suggested the following factors were related to the conflicts: reasons for marriage, traditional views about marriage and divorce including to accept a marriage arranged by the parents, the husband's traditonal attitude toward the sex role of the wife, the husband's patriarchical authoritarianism, and his attitude toward the wife;s empolyment outside the home. The women thought these conflicts severely affected their relationships within the famaily, particularly with their children. Literature suggests links with such poor parent-child-family relationships and adolescent or young people's social problems. Volunteers or professionals working with married women in counselling situation need to be conscious of the possibility of these conflict during assessment, and direct their guidance toward such conflict resolution. The researcher makes several suggestions which include the need for the husband to give emotional supports to his wife, to recognize the worth of housework, to share the work of the home, to fine ways to enhance the wife's self-actualization and to ease dreary housework routines by prviding modern appliances.

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An Intelligent Wireless Sensor and Actuator Network System for Greenhouse Microenvironment Control and Assessment

  • Pahuja, Roop;Verma, Harish Kumar;Uddin, Moin
    • Journal of Biosystems Engineering
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    • v.42 no.1
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    • pp.23-43
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    • 2017
  • Purpose: As application-specific wireless sensor networks are gaining popularity, this paper discusses the development and field performance of the GHAN, a greenhouse area network system to monitor, control, and access greenhouse microenvironments. GHAN, which is an upgraded system, has many new functions. It is an intelligent wireless sensor and actuator network (WSAN) system for next-generation greenhouses, which enhances the state of the art of greenhouse automation systems and helps growers by providing them valuable information not available otherwise. Apart from providing online spatial and temporal monitoring of the greenhouse microclimate, GHAN has a modified vapor pressure deficit (VPD) fuzzy controller with an adaptive-selective mechanism that provides better control of the greenhouse crop VPD with energy optimization. Using the latest soil-matrix potential sensors, the GHAN system also ascertains when, where, and how much to irrigate and spatially manages the irrigation schedule within the greenhouse grids. Further, given the need to understand the microclimate control dynamics of a greenhouse during the crop season or a specific time, a statistical assessment tool to estimate the degree of optimality and spatial variability is proposed and implemented. Methods: Apart from the development work, the system was field-tested in a commercial greenhouse situated in the region of Punjab, India, under different outside weather conditions for a long period of time. Conclusions: Day results of the greenhouse microclimate control dynamics were recorded and analyzed, and they proved the successful operation of the system in keeping the greenhouse climate optimal and uniform most of the time, with high control performance.

Analysis of Research Trends on Domestic Stage Costumes (무대의상 연구의 동향 분석)

  • Choi, Hyunok;Yi, Kyonghwa
    • Journal of Fashion Business
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    • v.18 no.2
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    • pp.1-13
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    • 2014
  • This study examines research trends in the dissertations and journal articles on stage costume so as to provide basic information on directions for future studies. The data was collected from the theses of domestic journals of the Korean Studies Information (KSI) which were published until December, 2012 and retrieved by a keyword related to the "design of stage costume", "costume for performing art", and etc. Theses and articles for the analyses were a total of 200 published. Reviewing the theses by dividing the times into 8 Chronicles of 5 years in each term. The findings of the study are as follows: According to the chronological analysis, there has been a steady increase in the rates of the musical, ballet, dance, and circus costume and cutting edged technology such as LED has been utilized in the performing art, currently. The real production and making up of the costumes have been increasing as well by replacing of illustration and rendering of the costumes. In the recent costume of the performing arts show the tends of the visual effects and up-sizing, comprehensiveness and fusion. From the analysis of the background of the work, those were confirmed that the most common historical period was modern period, and places were France, England, and Egypt. In regard to research themes and methods, many of research papers utilized content analysis method, character analysis method as research methods. The most popular presentation of the costume designs was "rendering", "costumes schedule" and "illustration". However, development and explanation of the patterns was insufficient and constructions methods and real works(costumes) were usually omitted in the articles.

Study on the Dietetic Internship Program of Catering Company (일부 급식 서비스 기업의 인턴 교육 프로그램에 관한 연구)

  • Jang, Seong-Mi;Lee, Young-Mee
    • Korean Journal of Community Nutrition
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    • v.12 no.3
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    • pp.322-332
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    • 2007
  • The purposes of this research were to examine the effect of the catering company's dietetic internship program through a self-evaluating ability test about management performance between pre and post internship programs and consequently to suggest improvement in the internship program. In this study, two types of questionnaires were conducted in July and October 2006, targeting 41 dietetic interns who trained in a 6 months internship program. Except the 4 dropped interns, data from 37 interns were collected and used for statistical analysis, using the SPSS Win 11.0 version. The results of this study were as follows: First of all, the analysis on the effect of the internship program according to classified management segments showed significant improvements in the following order: purchase management (p<0.001), computer program management (p<0.001), facilities management (p<0.001), accounting management (p<0.01), personnel management (p<0.01), retention management (p<0.01), sanitation management (p<0.01), service management (p<0.01) and foodservice management (p<0.01). However, there was no significantly improvement in management of clients. Secondly, the result of the analysis on the details of each management segment that were significant improvement and changing score was the top 5 duties were as follows: In the purchase management, the score of weekly and daily order management was increased 1.0 (p<0.001), the score of weekly inventory management was 0.81 (p<0.001). In the computation office management, expenses handling through a computer program was 0.65 (p<0.01). In the personnel management, the score of work schedule management increased 0.81 (p<0.001). In the accounting management, the score of monthly profit and loss account management was 0.65 (p<0.001). Furthermore, qualified educational programs connected with the internship program will have to be systematically developed and continually carried out in order to improve service and management abilities of branch managers.

Postgraduate Students’ Use of E-Resources in Nigerian University Libraries: What is the Influence of User Education?

  • Abubakar, Daniel;Adetimirin, Airen
    • Journal of Information Science Theory and Practice
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    • v.4 no.3
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    • pp.43-56
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    • 2016
  • Introduction. Inadequate methods for acquiring user education could affect the level of library user education possessed by postgraduate students, and ultimately influence the purposes of their usage of e-resources provided in their university libraries. Despite the global acceptance that e-resources are contributing to postgraduate student’s research work, however, it has been documented that there is low use of e-resources in university libraries in Nigeria among postgraduate students. This drift could have negative consequences on their overall development. Therefore, this study determined how influential library user education is on the use of e-resources by postgraduate students in Nigerian university libraries.Methods. A survey research design and multi-stage sampling technique was adopted to select 2,726 from 54,578 postgraduate students from four faculties in 16 federal conventional universities in Nigeria. The data set was collected using a questionnaire and an interview schedule for e-resources librarians/system librarians and was analysed using percentage and Pearson’s product moment correlation.Results. The majority of the students were at the Master’s level (57.5%). The gender shows a ratio of 59.0% male and 41.0% female. Most Nigerian students enrol for postgraduate programmes in their thirties ‘30-39’ years. The use of e-resources by the postgraduates was low (weighted average of 2.45). The relationship between level of library user education and postgraduate students’ use of e-resources was positive, slightly strong, and significant (r = 318; df = 2284; p< .05).Conclusion. User education has positively inclined postgraduate students to the use of e-resources in their libraries. Therefore, libraries should employ all methods for acquiring user education for postgraduate students.

Cases Study of Accidents in High Risk Organizations by System Dynamics (시스템 다이내믹스 기법을 활용한 고위험 조직 사고 사례 분석)

  • Oh, Youngmin;Ryu, Jin
    • Korean System Dynamics Review
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    • v.16 no.3
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    • pp.5-29
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    • 2015
  • The importance of the concept of safety culture has increased in the security of high-risk facility after Chernobyl accident in 1986. This paper elaborated the concept of safety culture and its main factors by Causal Loop Diagram. Due to the decline of safety culture, the occurrence of incidents and accidents require more and more corrective actions to the members of high-risk facilities and thereby increasing their workloads. Employees who must complete the task within the given time have to have time pressures and don't comply with the rules and procedures. Also, a schedule pressure is a big stress for employees, causing mistakes in precision work. In order to improve these problems, CLD of the safety culture in this paper suggests hiring more workers, re-allocation of given workloads and strengthen the learning, communication capabilities and safety leadership. In addition, the two real accident cases were analyzed to test the feasibility of the System Dynamic simulation model through the process of structuring the fault trees on the stationary black out accident in Kori unit 1 in South Korea and Kleen Energy power station explosion in US. The simulation results show that the various safety factors cause the serious accident combined with mechanical failure and safety culture will reduce the possibility of the accidents in these high-risk organizations. This simulation model can contribute to analyzing the impact of the organizational and human factors of safety culture and can provide the alternatives in high-risk facilities.

Design and Implementation of Context Awareness Inference System Based on Ontology - Focusing on Tour Information Guidance SmartPhone Application (온톨로지기반 상황인지 추론시스템 설계 및 구현 - 여행정보안내 스마트폰 앱을 사례로)

  • Lee, Jae Gil;Joo, Yong Jin;Park, Soo Hong
    • Journal of Korean Society for Geospatial Information Science
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    • v.20 no.4
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    • pp.67-75
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    • 2012
  • For the last few years, LBS has attracted considerable attention from many industries and societies as a result of propagated smart devices. LBS has a high utilization of mobile users as it uses user positions as a significant factor. Current LBS has only taken user position into account and it makes some limits. So, it is necessarily suggested that support for personalized services which consider user's motion, traffic condition, weather condition, time, personal information and preferences that have a huge impact on the accuracy. The purpose of this study is to design the inference systems with user's motion, preferences and schedules and provide users with the personalized information. To achieve this, Movement Ontology, User Profile Ontology, Schedule Ontology and Work Ontology should be constructed and based on this, smart applications were developed. Developed applications induced appropriately recommended results according to user's preference, motion and directions.

The consideration of development for the Speed Gate Tester applied Embedded System (임베디드 시스템을 적용한 스피드게이트 시험기 개발에 관한 고찰)

  • Yu, Sin-Cheol;Nam, Jeong-In;Lee, Gi-Seung
    • Proceedings of the KSR Conference
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    • 2009.05a
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    • pp.860-865
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    • 2009
  • This thesis deals with application of Windows CE for Embedded System and the development methode of "Speed Gate Controller Tester" taking advantage of development program. We can improve reliability, stability and convenience of maintenance work as use of "Speed Gate Controller Tester" which was developed and applied "Embedded System" We can provide customers with more qualified service naturally because of the higher rate of operation which makes people use more pleasant and comfortable subway facility. And also it is possible to manage processor, time schedule and hardware resource as application of Embedded System and Windows CE. Embedded System applied OS Windows CE makes it possible to develop other various products, another application of equipment and tester. Thus this paper treats problems the moment developed and the present condition, development process, field application results.

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Study on Constraints Analysis Classification for PPC Improvement (작업계획달성률 향상을 위한 작업제반요건 분류에 관한 연구)

  • Han, Jung-Hun;Kim, Dea-Young;Lee, Hak-Ki
    • Proceedings of the Korean Institute Of Construction Engineering and Management
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    • 2008.11a
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    • pp.252-255
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    • 2008
  • The purpose of construction project management is to achieve planned quality by adequate cost and schedule of the project, thus the effective time management is a critical factor to actualize the object. But the traditional time management by using milestone has several limitations which are not sufficiently considered mutual relation and variated from the task. On this wise, applying the concept and principles of lean construction to the project will be the best way not only reduce waste and variation, but also improve the productivity and ability to overcome limitation as mentioned above. Thus the study, Last Planner System, specially focuses on constraint analysis which is used in lookahead planning system. The results of this research will provide the constraints classification that is able to improve work reliable and percent plan complete when time planning by controlling constraints of project.

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