• 한국재난정보학회 논문집
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• 제11권2호
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• pp.279-286
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• 2015

본 논문에서는 국내에 거주하고 있는 외국인의 현황을 검토하고 이를 대상으로 재난의 경험 여부, 재난발생 시 위험성 및 문제점, 재난대응활동을 위한 서비스의 요구도 등에 대하여 인식조사를 실시하였다. 그 결과 재난발생 시 언어소통의 어려움으로 인한 신고의 어려움, 신고의 방법을 모른다는 점이 가장 큰 문제점으로 나타났다. 이에 대한 개선방안으로 신고를 접수할 수 있는 외국어 가능 전문인력을 확충하고 재난안전서비스가 필요한 곳에 지속적으로 제공해줄 필요성을 확인하였다. 또한 언어적인 문제와 신고방법의 어려움을 해소할 수 있는 제도적인 대책의 필요성을 확인하였다.

• ETRI Journal
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• 제40권6호
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• pp.745-758
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• 2018

A wide range of studies in various disciplines has focused on the Internet of Things (IoT) and cyber-physical systems (CPS). However, it is necessary to summarize the current status and to establish future directions because each study has its own individual goals independent of the completion of all IoT applications. The absence of a comprehensive understanding of IoT and CPS has disrupted an efficient resource allocation. To assess changes in the knowledge structure and emerging technologies, this study explores the dynamic research trends in IoT by analyzing bibliographic data. We retrieved 54,237 keywords in 12,600 IoT studies from the Scopus database, and conducted keyword frequency, co-occurrence, and growth-rate analyses. The analysis results reveal how IoT technologies have been developed and how they are connected to each other. We also show that such technologies have diverged and converged simultaneously, and that the emerging keywords of trust, smart home, cloud, authentication, context-aware, and big data have been extracted. We also unveil that the CPS is directly involved in network, security, management, cloud, big data, system, industry, architecture, and the Internet.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2007년도 춘계학술대회 논문집
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• pp.1097-1106
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• 2007

Rail provides running tract for train and broadly and widely conveys the weight of the train exerted from the train wheels that the rail directly supports onto the cross tie and roadbed, and supports the cross-sectional pressure exerted by centrifugal force at curvatures. That is, stationary rail provides surface on which dynamic train runs and guarantees cross-sectional resistance to enable the vertical snake motion of the train wheels as well as to maintain lateral force at curvatures. Rail provides running surface on which train wheels can run smoothly, and secures vertical and lateral force. However, it undergoes continuous destructive reactions (wearing and damages) and abrasion of the cladding by the train wheels. It is obvious that wearing will result when two metal parts act against each other. However, occurrence of abnormal wearing such as rapid wearing of the rail side due to complex generation of various mechanisms at the contact surface between the rail and train wheel flange. It is not easy to simply examine the causes of occurrence of abnormal wearing of rail and train wheel flange. Although countless number of academicians and specialists are conducting researches on abnormal wearing of rail and vertical wearing of train wheels, I believe it is too early to argue on pros and cons due to insufficiency of officially verified information on the issue. This review will be focusing on the examples of repairs that reduced the generation of abnormal wearing of rail by reviewing and improving characteristics of wearing and slack, speed of the train and cant as well as status of lubricator by choosing the compound curves present in the section between the $Anguk{\sim}Jongno3-ga$ Stations of the Route No. 3 among the compound curve tracks of the Seoul Metro Routes No. 3 & 4 at which abnormal wearing is generated continuously.

• 한국보건간호학회지
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• 제18권2호
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• pp.258-275
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• 2004

The purpose of this study was to measure safety-awareness among elementary students, identify their safety-practices and actual status of accidents. The study was also done to acquire basic information on safety education to help students be more aware of safety, and more active in accident-prevention activities. A random sample was taken of 763 5th and 6th grade students in 4 different elementary schools in Seoul. Of the 735 questionnaires collected, 684 were complete and were used in the analysis. SPSS was used to analyze the questionnaires. The results are summarized as follows. First, the overall safety-awareness score was relatively high at 139.06 of a maximum of 164. and respondents were most conscious of the section on Home Safety. Second, the safety-practices of the respondents was at the middle level with a mean score of 56.01 of a maximum of 80. The factors affecting the safety-practice of the respondents were education of their parents, recognized learning proficiency, awareness of need for safety education, and level of safety-education conducted by parents. Third, $53.4\%$ of the respondents had experienced one or more accidents during the past year. Most of the accidents occurred during play and recreation and home accidents were the most frequently reported accidents. The risk factors related to the occurrence of accidents were gender, relationship with friends, recognized learning proficiency, and awareness of traffic safety. Forth, higher safety-awareness was found to be directly related to higher safety-practices. Respondents with lower safety-awareness reported higher rate of accidents. In view of the results so far achieved, habituation and formation of safety-oriented actions among students are highly required to prevent accidents. In order to do that, development of safety-awareness and in-life enforcement of safety-practice need to come first.

• 대한공간정보학회지
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• 제17권2호
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• pp.61-69
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• 2009

2006년 7월 중순 강원도 전역에 내린 집중호우로 인해 사상자 48명, 가옥 침수 1,248채에 이르는 인명.재산피해와 3조 5,125억 원에 이르는 피해 복구비용이 발생하였다. 강원도는 지역의 대부분이 산지로 산사태 지역에 대한 접근과 정확한 피해규모 추정에 어려움이 있다. 본 연구는 항공영상촬영 기술을 사용하여 보다 신속하고 정확하게 강원도 산사태 발생 지역 확인 및 특성을 분석하고자 한다. 본 연구를 수행하기 위해 산사태 발생 직후 PKNU 4호 시스템으로 산사태 지역을 촬영하였다. 촬영된 영상은 ERDAS 9.1을 이용하여 정사보정 후 육안판독에 의한 디지타이징(Digitizing)으로 산사태 발생지역 1,054개소를 추출하였고, 이 지역에 대해 GIS 프로그램인 ArcGIS 9.2를 이용하여 수치지도, 임상도, 지질도, 토양도와의 중첩분석을 통해서 산사태발생지역에 대한 수문학적, 지형학적, 임상학적, 지질학적, 토양학적 현황과 특성을 DB로 구축, 산사태의 발생현황 및 특성을 분석하였다.

• 보건행정학회지
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• 제22권2호
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• pp.275-296
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• 2012

Graduate School of Public Health, Seoul National University The national health insurance system in Korea is characterized as relatively high out-of-pocket payments, which are the principal source of catastrophic health expenditure (CHE). The objectives of this study are to estimate the incidence of household CHE and to clarify the characteristics that affect the occurrence and recurrence of household CHE using the Seoul Welfare Panel Survey database for 2008 and 2010. Thresholds to estimate CHE were 10% and 20% of the total household income (T/X), and 25% and 40% of the income excluding food share (T/Y). Determinants of the occurrence and recurrence of CHE at the threshold of T/X=10% were analysed using multiple logistic regression models. Out of the 3,665 households that responded in 2008 survey, households with CHE were 12.07% (T/X${\geq}$10%), 5.34% (T/X${\geq}$20%), 6.84% (T/Y${\geq}$25%), and 4.44% (T/Y${\geq}$40%). Risk factors associated with household CHE included living with a spouse, non-Medicaid beneficiary, householder unemployment, low household income, the number of disabled members, poor subjective health, and the number of chronic diseases. A total of 41.78% of households with CHE in 2008 repeatedly experienced CHE in 2010. Risk factors of CHE recurrence included decreased household income and an increase in chronic diseases over the two time periods, the number of members with disability or chronic diseases, and the presence of cancer patients in 2008. Households with lower socioeconomic and health status had a higher financial burden on health care than do their counterpart households. There is a need to enhance society-wide financial protection from health spending among vulnerable citizens in Seoul, particularly, households with low income, disabled members or cancer patients.

• Journal of Preventive Medicine and Public Health
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• 제34권1호
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• pp.35-40
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• 2001

Objectives : To elucidate the transient effects on the risk of occupational injuries as acute events and establish so alternative proposal. Methods : The study population comprised a total of 302 workers randomly selected from applications for occupational injury compensation reported to the Inchon local labor office from January 1. 1999 to December 31. A case-crossover design, where each case serves its own control, was applied to this study. Through a telephone interview, workers provided useful data concerning five job related stressful events such as company transfer, work load change, overtime work, exchange duty, and work-part transfer. They were asked whether there were stressful events within a week of the occurrence of injury and the degree of stress. Exposure status from one year prior was used as control information. In the end, the data provided by 158 of selected persons was used for the analysis based on the quality of the data provided by the participants. A conditional logistic regression was used to discover the transient effects on the risk of occupational injuries as acute events. Results : The effects a company transfer and work load change on occupational injury was statistically significant on the risk of occupational Injuries as an acute event(RR=5.5, 95% CI=2.501-12.428; RR=3.1, 95% CI=1.963-5.017, respectively). Other stressful events were found to elevate the risk factor for the occurrence of occupational jujury, but were not significant. Conclusions : Our results suggested that transient stressful events elevated the risk factor for the occurrence of occupational injury.

• Journal of Chest Surgery
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• 제54권1호
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• pp.53-58
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• 2021

Background: We aimed to investigate the characteristics of primary spontaneous pneumothorax (PSP) in adolescents and to analyze the relationship between the occurrence of PSP and air pollutants. Methods: Data pertaining to age, sex, body mass index, smoking status, initial pneumothorax volume, presence of bullae, treatment methods, and city of residence were retrospectively obtained from January 2010 to December 2014. We investigated the association between short-term exposure to air pollutants (SO2, NO2, O3, CO, and PM10) and the occurrence of PSP using a case-crossover design with conditional logistic regression. Results: We collected information from 598 patients who were admitted for PSP, with a mean follow-up duration of 62.9 months. The majority (91.1%) of the patients were male. In the case-crossover design, conditional logistic regression showed that no air pollutant was associated with the occurrence of pneumothorax. The results were consistent across all city subgroups (Anyang, Gunpo, Uiwang, and Gwacheon). Conclusion: In our study, the incidence rate of pneumothorax was 153.8 per 100,000 person-years in male adolescents and 16.7 per 100,000 person-years in female adolescents. The case-crossover design showed that PSP in adolescents is unlikely to be related to air pollution.

• 한국식품위생안전성학회지
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• 제39권3호
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• pp.191-208
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• 2024

펩타이드형 독소인 마이크로시스틴(microcystins, MCs)과 노둘라린(nodularin, NOD)은 남조류라고도 알려진 시아노박테리아에 의해 생성되는 2차 대사산물로, 독소에 오염된 물, 토양 및 비료를 사용함으로써 농산물 내에 축적되고 이를 사람이 섭취함으로써 건강상 위해가 발생할 수 있다. 최근 MCs과 NOD의 농산물 내 오염에 대한 관심이 대두되며 국내외에서 여러 분석법을 기반으로 농산물 내 오염 수준을 조사하고 있다. 하지만 아직까지 수행된 연구가 많지 않으며, 특히 펩타이드형 독소 중 MCs의 분석 연구에 치중되어 있거나 오염 취약 지역에서 재배한 농산물이 주로 오염도 조사에 사용되는 등 연구에 한계가 있으므로 MCs과 NOD의 관리를 위해서는 보다 많은 체계적인 연구가 필요할 것으로 생각된다. 본 연구에서는 체계적인 모니터링 및 안전관리의 기반을 마련하기 위해 MCs 및 NOD의 이화학적 특성, 독성, 분석법, 오염사례 및 관리현황에 대해 기술하였다.

• 한국응용곤충학회지
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• 제43권3호
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• pp.189-194
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• 2004

1998년부터 2000년까지 3년간 경북사과주산지 사과원과 묘목원을 대상으로 잎말이나방류 종을 조사하였으며, 1992년부터 2001년까지 10년간 5-6개 시군의 관행사과원과 폐원에서 잎말이 나방 발생동향과 피해정도를 조사하였다. 사과원에 발생하는 잎말이나방으로는 애모무늬잎말이나방 (Adoxophyes orana), 사과무늬 잎말이나방(Archips breviplicanus), 매실애기 잎말이나방(Rhopobota unipunctana), 사과잎말이나방(Choristoneura longicellana), 복숭아잎말이나방(Acleris fimbriana), 감나무잎말이나방(Ptycholoma lecheana circumclusna), 한국잎말이나방(Archips subrufanus) 등 총 7종이 조사되었다. 이중 애모무늬잎말이나방이 매년 단연 우점종이었으며, 사과무늬잎말이나방과 매실애기잎말이나방은 특정 해에만 1-2 농가에서 다발생하였다. 1980년대 우점종은 사과무늬잎이나방과 매실애기잎말이나방이였으나, 1990년대말 우점종 변화가 이루어진 것으로 조사되었다. 10년간 관행사과원의 잎말이나방 피해정도를 조사한 결과, 평균 피해과율은 $0.67\%$였다. 과실 피해는 3세대 유충에 의해 8-10월에 집중적으로 이루어졌다.