• 대한안전경영과학회지
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• 제26권2호
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• pp.23-31
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• 2024

In the military, ammunition and explosives stored and managed can cause serious damage if mishandled, thus securing safety through the utilization of ammunition reliability data is necessary. In this study, exploratory data analysis of ammunition inspection records data is conducted to extract reliability information of stored ammunition and to predict the ammunition condition code, which represents the lifespan information of the ammunition. This study consists of three stages: ammunition inspection record data collection and preprocessing, exploratory data analysis, and classification of ammunition condition codes. For the classification of ammunition condition codes, five models based on boosting algorithms are employed (AdaBoost, GBM, XGBoost, LightGBM, CatBoost). The most superior model is selected based on the performance metrics of the model, including Accuracy, Precision, Recall, and F1-score. The ammunition in this study was primarily produced from the 1980s to the 1990s, with a trend of increased inspection volume in the early stages of production and around 30 years after production. Pre-issue inspections (PII) were predominantly conducted, and there was a tendency for the grade of ammunition condition codes to decrease as the storage period increased. The classification of ammunition condition codes showed that the CatBoost model exhibited the most superior performance, with an Accuracy of 93% and an F1-score of 93%. This study emphasizes the safety and reliability of ammunition and proposes a model for classifying ammunition condition codes by analyzing ammunition inspection record data. This model can serve as a tool to assist ammunition inspectors and is expected to enhance not only the safety of ammunition but also the efficiency of ammunition storage management.

• 대한안전경영과학회지
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• 제14권3호
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• pp.11-19
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• 2012

Especially because of the distinctiveness that new experiments and research provoke coexistence of various risk factors, the researchers in university laboratory are being exposed to incidents that are difficult to predict. Due to the fact that the numbers of accidents that occur at the university laboratory are increasing, the necessity for laboratory safety management is on the rise. Most laboratory accidents are caused by the ability that can detect risk factors such as unsafe behavior or unsafe condition but is not working perfectly. In order to prevent researchers in advance from unsafe behavior or unsafe condition, effective safety education, systematic safety management, safe research environment, continuous safety check and proper measures after accident are the most important factors. In this study, survey was conducted in university laboratory to identify the factors that affect on safety management and to measure the safety management level. As a result, effective measures are proposed for the improvement of the safety management level.

• 한국융합학회논문지
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• 제8권12호
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• pp.159-165
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• 2017

본 연구는 노인의 의치보철 사후관리와 관련하여 의치관리 교육이해에 따른 의치관리실태의 차이를 확인하고자 2016년 10월 15일부터 12월 15일까지 대구지역의 65세 이상 의치 장착자를 대상으로 구조화된 설문지를 이용한 직접면담조사를 실시하였다. 그 결과 일반적 특성에 따른 의치관리 교육이해는 연령, 교육 수준, 의치제작비용충당, 주관적 건강상태, 의치 위치, 상 하악 의치착용년수, 치과관리방문횟수, 구취 정도가 통계적으로 유의한 차이가 있었다(p<0.05). 의치관리 교육이해을 종속변수로 유의한 영향을 미치는 독립변수는 의치제작비용충당, 주관적 건강상태, 구취 정도가 부(-)적 영향을 주었고, 의치 위치가 정(+)적 영향을 주었다. 따라서 의치 장착의 사후관리에 있어서 노인의 특성을 고려한 지속적인 관리교육이 필요할 것으로 사료되며, 향후 공통된 관리교육 매뉴얼이 마련될 수 있도록 해야 할 것이다.

• 한국경영과학회:학술대회논문집
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• 한국경영과학회/대한산업공학회 1999년도 춘계공동학술대회:정보화시대의 지식경영
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• pp.451-452
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• 1999

• 국제학술발표논문집
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• The 3th International Conference on Construction Engineering and Project Management
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• pp.1534-1539
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• 2009

During the last ten years, there have been many studies related with settlement and reinvigoration of CM. These researches have shown that the application of CM has been not reinvigorated in Korean construction industry yet, because of some problems such as the insufficient application of the public sector, the policy matters and the CM fee estimates. But the present condition data of the Korean CM Market shown in these studies was insufficient for the standpoint of Market itself. Also, some of these studies compared the Korean CM Market with The America CM Market, to study the foreign CM markets. However, because the Korea CM Market only has the CM for Fee Market but the American CM Market has the CM for Fee and the CM at Risk, the Korea CM Market must be not only compared with the America CM Market but also compared with the America CM for Fee Market. Therefore, the purpose of this study is to determine the present condition of the Korea CM Market through the compare and contrast of the Korean CM Market, American CM Market and American CM for Fee Market, by the Market Growth rate and Market Share. This study further aims to verify whether Korean CM market was implemented.

• 한국조경학회지
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• 제23권4호
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• pp.1-11
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• 1996

The purpose of this study was to suggest the more efficient system for management in urban park through the investigation of the managemental condition. Research sites for managemental condition were 9 municipal park managemental offices in Seoul, Pusan and Taegu. The degree of the managemental state in these parks was generally passive and low. So, each of them had to consider the ways how to buy private-owned sites, to standardize facility maintenance, to characterize the managemental objects, to enlarge managemental personnels and systems, to apply entrusting management, to plan user-service strategies and to shorten expenditures. Particularly the positive managemental improvement in user control was demanded to cope with the changing social needs. In long term, they had to develop basic elements for the reasonable park management, clear park maps, area of facilities, the event, citizen participation, budgets and etc., and had to prepare the middle-long term management plan and the precise analysis to the managemental criteria.

• 한국주거학회논문집
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• 제10권1호
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• pp.125-135
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• 1999

This study is intended to analyze the condition of management about the apartment houses in Israel. The subjects of the study were 32 house-committees who live in Jerusalem and Haifa, and who were interviewed by structured questionnaire from the 1st of April through the 30th of May 1997. The statistical methods used for the study were: frequency, percentage, mean, t-test and ANOVA by the SPSS for MS Windows Release 6.0 program. The main results of this study are as follows: 1) The most house-committee members were elected by the residents who attend the annual meeting. 2) The period of management of the committee was average of 4.1 years. 3) The tasks of the committee were to collect the management fee and make the contracts for cleaning and gardening for buildings. 4) The opinion about having the professional managers was negative. 5) The major issues of the committee were being supported by either the local authority or the other organizations which are related to housing management.

• 가정과삶의질연구
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• 제20권2호
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• pp.21-28
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• 2002

The purpose of this study was to investigate how the financial satisfaction of housewives was related with the financial condition of households and the performance evaluation of household financial management behavior. In order to examine this relationship, internet questionnaire survey was conducted with 598 housewives. Results showed that household income and monthly debt repayment had only indirect effects on the financial satisfaction while monthly saving had both of the direct and indirect effects. It indicates that financial satisfaction level varies with the perceived performance of financial management behavior even though they have the same level of financial resources. Specifically, the division of financial roles and problem solving style between husband and wife affected the financial satisfaction of housewives.

• 한국안전학회지
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• 제14권2호
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• pp.140-147
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• 1999

Currently, the consumer pattern is directed to small quantity and high variety these days. World market is led by technological innovations and changes rapidly. To survive in this environment, the raising of small and medium enterprises is highly desirable. In the context of nationwide restructuring, competitive medium and small industries which are in good financial status should lead the nation's economy. But general ignorance of the safety issues could lead to a miss management of this industry in this field. In this study, actual condition and improvement of safety management are as follows; We have to 1) find out the factors which endangers this industry, and set a proper guideline for safety management. 2) encourage safety management of these industries by themselves, and advertise and provide technical support for using PC and internet. 3) set a higher standard of safety issue when accrediting a prospective medium and small industry, and have a firm control of this issue once accredited. 4) supply more governmental financial aids to terms of safety issues for medium and small industries.

• 품질경영학회지
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• 제24권4호
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• pp.14-28
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• 1996

We consider optimal designs of partially accelerated life testing which is deviced for parallel systems with the considerably long life time. In partially step-stress life testing, test items are first run simultaneously at use condition for a specified time, and the surviving items are then run at accelerated condition until a predetermined censoring time. In partially constant-stress life testing, test items are run at either use or accelerated condition only until a specified censoring time. The optimal criterion for each test is to minimize either the generalized asymptotic variance of maximum likelihood(ML) estimators of the hazard rates at use condition and the acceleration factors or the asymptotic variance of the ML estimators of the acceleration factors.