• 한국산학기술학회논문지
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• 제19권1호
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• pp.75-84
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• 2018

본 철도 유지보수 산업의 효율화를 위해서는 핵심부품의 적시 관리를 통한 부품 가동률 향상 및 철도 운행의 안정성 향상이 필요하다. 또한 유지보수 시스템 고속화에 따른 신뢰성 향상과 핵심부품의 유지보수 비용 절감의 두 가지 측면을 모두 만족시키기 위해, 부품 이력관리와 대규모 빅데이터의 자동화된 분석 기술을 활용한 부품 상태 진단 기술 수요가 증가하고 있다. 이 논문에서는 철도차량의 차상 및 지상 장치로부터 발생되는 실시간 빅데이터 수집, 처리, 분석을 위해서 빅데이터 플랫폼 기반의 철도차량 부품의 상태 데이터 관리시스템을 개발하였으며, 이 시스템의 활용으로 철도차량의 부품 상태정보 및 시스템 리소스에 대한 실시간 모니터링이 가능하다. 또한 빅데이터 플랫폼으로부터 수집된 상태 데이터를 기반으로 분산/병렬처리 및 자동화된 부품 고장진단이 가능한 머신러닝 기법을 제안하였다. 실험결과, 분산/병렬처리 기술이 적용된 알고리즘의 실행시간 단축을 아마존 웹서비스의 가상 인스턴스 생성 시스템을 통해 증명하였으며, random forest 머신러닝 기법을 활용한 고장 진단 모델의 베어링 및 차륜 부품에 대한 상태 예측 정확도가 83%임을 확인하였다.

• Journal of Preventive Medicine and Public Health
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• 제36권2호
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• pp.171-178
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• 2003

Objective : The aim of this study was to identify the validity of recruiting medical checkup participants of Vietnam veterans using a mail survey, and to identify the 'Vietnam service related characteristics' and 'general characteristics' of Vietnam veterans groups, Method : In this study, a total 900 veterans were randomly selected from the list of Vietnam veterans from f964 to 1973. The veterans were classified into 5 groups, taking into consideration their registered status in the Ministry of Patriots and Veterans Affairs: the VRD (veterans who have agent orange-related diseases), VSD (veterans who have agent orange-suspected disease), VM (veterans who peformed meritorious deeds during the war), VR (veterans who were registered with the Ministry of Patriots and Veterans Affair) and OV (other veterans) groups. By means of postal surveys, the veterans' intention to participate in the medical checkup for our research, and their socioeconomic and general characteristics were investigated. 52 surveys were returned due to the subjects not residing at the listed address, and were excluded from the analysis. Result : 699 of the 848 veterans (82.4%) responded to the survey, of which 619 (88.6%) intended to participate in the medical checkup for our research. The S veterans groups all had similar ages, Vietnam service period, Agent Orange exposure, troop characteristic and wartime class, with the exception of VM, who were older, and with a greater number of officers than the other 4 groups, There was a big difference in the health statius among the Vietnam veterans group. The VM and OV were much healthier than VRD, VSD and VR groups, The socioeconomic stati of the VRD, VSD and VR groups were lower than those of the VM and OV groups. Conclusion : Although there were some limitations, the recruitment, by mail, of medical checkup participants from Vietnam veterans is a valid and feasible method. The VM and OV groups were much healthier, and with higher socioeconomic stati, than the VRD, VSD, and VR groups.

• 유통과학연구
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• 제10권5호
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• pp.45-55
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• 2012

본 연구는 현재 국내 택배업체들이 택배이용자들에게 제시하고 있는 '택배요금기준'의 불합리성을 개선하여 합리적인 기준에 의한 요금 수수가 이루어 질수 있도록 하기 위해서 수행되었다. 일반적으로 화물운송임은 화물의 중량이나 부피의 크기를 기본으로 하고 몇 가지의 할인 및 할증의 요소들을 감안하여 책정이 된다. 특히 택배서비스와 같이 공공물류의 성격이 강하고, 불특정 다수가 이용하는 경우에는 요금기준의 합리성이 강하게 요구된다고 할 수 있다. 따라서 택배거래의 기준이 되는 택배요금의 기준이 합리적으로 설정되어 있어야 하는 바, 현재 국내택배업체들이 자체적으로 설정하여 적용하고 있는 택배요금기준이 합리적으로 설정이 되어있는 지에 대하여 분석하였다. 이를 위하여 문헌 및 선행연구들을 통하여 각종 이론을 검토하고 외국의 택배업체들의 요금계산방법, 타운송수단의 운임의 적용기준 등을 검토하였으며 택배화물을 표본조사를 하여 '부피의 크기'기준과 '3변의 합의 크기' 기준 중 어떤 기준이 더 합리적으로 요금의 크기를 나타내고 있는지를 회귀분석을 통하여 분석하였고, 운임 결정의 또 하나의 중요한 요소인 중량의 크기를 어떤 방법이 더 잘 반영하는지를 검토하였다. 연구결과 '부피의 크기'에 의한 화물의 크기결정방법이 현실적으로 요금수준을 합리적으로 설명하고 화물의 중량과의 상관관계도 높게 나타내고 있음을 알 수 있었다. 따라서 현재의 '중량의 크기'와 '3변의 합의 크기'에 따른 요금기준은 '중량의 크기'와 '부피의 크기'기준으로 변경되는 것이 합리적이라는 결론에 도달하였다.

• 한국식품영양학회지
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• 제24권4호
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• pp.639-648
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• 2011

The purpose of this study was to investigate foodservice management practices in the child care centers and kindergartens. Interviews were held from May to July 2008 to understand the current situation concerning foodservices in Seoul and Gyeonggi provinces. Surveys were sent out from August 2008 to April 2009 to 1,478 child care centers and 299 kindergartens via the postal service. Among them, 203 child care centers(13.7%) and 64 kindergartens(21.4%) responded. One of the largest concerns while preparing the food was nutrition(68.7%, 69.8%, respectively) followed by sanitation(24.4%, 27.0%, respectively). The most frequently referred sources for planning the menu were the Seoul child care information center(55.4%) for child care centers and kindergarten related internet sites(39.0%) for the kindergartens. In general, the child care center principal was in charge of planning the menu(40.1%). Child care centers and kindergartens purchased ingredients mostly from large retailers(55.3% and 44.7%, respectively), whereas 46.0% and 56.3% of those did through foodservice suppliers. Dietitians were rarely employed at these facilities, and this may cause unprofessional foodservice management.

• 경영정보학연구
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• 제7권2호
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• pp.141-162
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• 2005

본 연구에서는 보다 효율적이고 지능적으로 운영될 수 있는 미래형 우편접수창구를 구축하기 위한 계획을 수립한다. 현황분석을 위해 우선 사용자의 요구사항을 정의하고 현행 문제점과 각종 이슈를 분석하며, 선진국의 다양한 우편서비스 제공기관에 대한 선진사례분석을 수행한다. 선행된 현황분석과 선진사례분석 결과를 기반으로 미래형 우편접수창구에 대한 기념적 모형을 설계한다. 제안된 모형은 무인우편창구, 다량우편창구, 통합우편창구로 대별할 수 있으며, 비효율과 부정확성을 제거하기 위해 정보기술과 자동화기술을 적용함으로써 우편접수 업무가 보다 효율적으로 수행될 수 있도록 설계되었다. 이후 제안된 개념적 모형의 구축을 위한 추진과제를 정의하고, 개별과제에 대한 실행우선순위를 결정하기 위해 현업담당자와 관련 전문가의 설문을 통해 과제들의 중요도와 선후행관계를 평가한 후, 최종적으로 우편접수창구에 대한 구축계획을 수립하였다. 본 연구에서 제시된 구축계획을 바탕으로 향후 보다 효율적이고 효과적인 우편접수창구를 구축할 수 있을 것으로 기대한다.

• Journal of Preventive Medicine and Public Health
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• 제36권1호
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• pp.39-46
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• 2003

Objectives : To investigate the availability and demand for overall cancer-related information, and to establish a basic plan for the construction of a cancer database and information system based on the research results from Korea. Methods : Postal and telephone surveys were carried out, between August 2001 and November 2001, of 323 affiliated faculty professors from medical universities and colleges in Korea. The data were analyzed with descriptive statistical methods, with regard to the present status and demand for health and cancer-related information. Results : Most (over 80%) subjects studied utilized the health-related information provided on Internet website from foreign countries, such as Medline, but similar comprehensive information system lacked in Korea. The construction of a cancer-related database of domestic research results was revealed to be in a great demand. Information on registration and statistics (52.8%), study results (48.5%) and study resources (37.4%) were the major ingredients required in the database. In constructing a database of the cancer-related research results, a full-text service, continuous updating of data, and the development of standardized user-friendly searching tool were regarded as the necessary components. The formulation of an information sharing system, regarding cancer-related clinical trials, was investigated as being quite feasible. Conclusion : This study demonstrated the great importance of cancer information systems, and much demand for an available cancer-related database based on Korean research results.

• Journal of Preventive Medicine and Public Health
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• 제46권5호
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• pp.213-225
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• 2013

Objectives: The aim of this study was to evaluate the association between Agent Orange exposure and self-reported diseases in Korean Vietnam veterans. Methods: A postal survey of 114 562 Vietnam veterans was conducted. The perceived exposure to Agent Orange was assessed by a 6-item questionnaire. Two proximity-based Agent Orange exposure indices were constructed using division/brigade-level and battalion/ company-level unit information. Adjusted odds ratios (ORs) for age and other confounders were calculated using a logistic regression model. Results: The prevalence of all self-reported diseases showed monotonically increasing trends as the levels of perceived self-reported exposure increased. The ORs for colon cancer (OR, 1.13), leukemia (OR, 1.56), hypertension (OR, 1.03), peripheral vasculopathy (OR, 1.07), enterocolitis (OR, 1.07), peripheral neuropathy (OR, 1.07), multiple nerve palsy (OR, 1.14), multiple sclerosis (OR, 1.24), skin diseases (OR, 1.05), psychotic diseases (OR, 1.07) and lipidemia (OR, 1.05) were significantly elevated for the high exposure group in the division/brigade-level proximity-based exposure analysis, compared to the low exposure group. The ORs for cerebral infarction (OR, 1.08), chronic bronchitis (OR, 1.05), multiple nerve palsy (OR, 1.07), multiple sclerosis (OR, 1.16), skin diseases (OR, 1.05), and lipidemia (OR, 1.05) were significantly elevated for the high exposure group in the battalion/company-level analysis. Conclusions: Korean Vietnam veterans with high exposure to Agent Orange experienced a higher prevalence of several self-reported chronic diseases compared to those with low exposure by proximity-based exposure assessment. The strong positive associations between perceived self-reported exposure and all self-reported diseases should be evaluated with discretion because the likelihood of reporting diseases was directly related to the perceived intensity of Agent Orange exposure.

• Journal of Acupuncture Research
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• 제22권6호
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• pp.141-153
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• 2005

Objectives : This survey was accomplished to find out how Korean medical doctors take acupuncture treatment in real clinics. Methods : The survey questions were developed by the consensus from the professors who major in acupuncture and moxibustion. The questionnaire was given the 2731 Korean medical doctors at the mending education site; In addition, it was given to 793 doctors working at the 105 Korean medical hospitals listed on the National Korean Medical Hospital Associations Address book by postal mail; and also it was given to the 142 public health care Korean medical doctors who attended the conference for the municipal and provincial representatives of the public health service Korean medical doctors. Total of 1277 questionnaires were retrieved out of the 3666 subjects. Results : 1. Nine hundred out of 1277 Korean medical doctors used method of differentiation syndromes(70.4%) and 1184 out of 1277 Korean medical doctors convalescence decide with subjective symptom improvement of patient(92.6%). 2. Nine hundred eight out of 1277 Korean medical doctors used both local and remote points(71.0%) and 916 out of 1277 Korean medical doctors treat with method of reinforcement-reduction(71.7%). 3. Eleven hundred fifth five out of 1277 Korean medical doctors used cupping a boil(90.3%) and 1023 out of 1277 Korean medical doctors used moxibustion(80.1%). Conclusion : When Korean medical doctors treat with acupuncture, most of them diagnose with differentiation methods and meridian theory, decide convalescence with subjective symptom improvement of patient, select out of both local and remote acupuncture points, treat with method of basic reinforcement-reduction, apply moxa and cupping a boil when they are necessary. The cupping a boil comes to be used when being muscle and joint disease. The moxa comes to be used when being chronic disease.

• 보건교육건강증진학회지
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• 제22권4호
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• pp.41-56
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• 2005

Objectives: More than 80% of unintentional injury was related to risk-taking behaviors involved in child accidents. Therefore, diverse care and concerns on safety should be provided from teachers as well as parents to build child safety behaviors. The purpose of this study was to identify the effects of safety concerns from students, teachers, and parents on elementary students' safety behaviors in Korea. Methods: The 5th and 6th grade students participated in this study in 14 elementary schools in Korea and the total number of students was 1,033. The study schools were selected by the stratified cluster sampling method throughout 7 metropolitan areas in Korea. Data were collected by the self-administered survey and the questionnaires were delivered to the vice-principals of the designated schools by ground postal service and the vice-principals conducted survey data collection. The questions on students' safety concerns, teachers' safety concerns, parents' safety concerns, safety practices, safety education, and demographics were included in the survey. All survey responses were encoded into SPSS program and t-test, ANOVA, and multiple regression analysis were utilized. Results: The students taking accidents one time more per year were more than 60% and the two thirds of them recognized that their accidents were due to their risk behaviors. Parents' education on safety practices was more frequent than teachers' education; furthermore, teachers' concerns on safety behaviors were poorer than students' or parents' concerns. In terms of safety behaviors, the scores of fire and home-related safety behavior were high but the scores of traffic and bicycle, in particular, helmet wearing practice were low. Three concerns from students, parents, and teachers all were significantly related to children's safety behaviors. Conclusions: In conclusion, safety concerns from the close networks are the important indicator of child safety behaviors and, the safety training programs, therefore, for parents and teachers as well as for students need to be developed for improving children's safe behaviors.

• 경영정보학연구
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• 제9권3호
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• pp.183-204
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• 2007

정보시스템의 효율적 도입 및 운영 등에 관한 법률"이 제정됨에 따라 국내 공공기관에서 정보기술아키텍처 도입이 의무화되었다. 이에 따라 정보기술 아키텍처 수립에 대한 관심이 고조되고 있으며 기관별 특성에 따른 성공적 정보기술 아키텍처 구축 사례에 대한 요구가 높아지고 있다. 본 논문은 국내 공공기관 정보기술아키텍처 도입을 주관하고 있는 정보통신부의 우정사업본부 정보기술아키텍처 수립 과정을 사례 연구를 통해 고찰함으로써 정보기술아키텍처 수립 시 발생한 이슈 및 해결방안, 핵심성공요인 등을 제시한다 현재 많은 부처들이 정보기술아키텍처 수립을 추진하고 있거나 도입을 고려하고 있는 현 시점에서, 정보통신부 우정사업본부의 정보기술아키텍처 추진사례를 통해 정보기술 아키텍처에 관심을 가지고 있는 공공기관들에게 사례를 바탕으로 한 시사점을 제공하였다.