• Journal of Radiation Protection and Research
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• 제45권2호
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• pp.53-68
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• 2020

Background: International organizations such as the World Health Organization (WHO) and the United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR) reported public exposure doses due to radionuclides released in the Fukushima nuclear accident a few years after the event. However, the reported doses were generally overestimated due to conservative assumptions such as a longer stay in deliberate areas designated for evacuation than the actual stay. After these reports had been published, more realistic dose values were reported by Japanese scientists. Materials and Methods: The present paper reviews those reports, including the most recently published articles; and summarizes estimated effective doses (external and internal) and issues related to their estimation. Results and Discussion: External dose estimation can be categorized as taking two approaches-estimation from ambient dose rate and peoples' behavior patterns-and measurements using personal dosimeters. The former approach was useful for estimating external doses in an early stage after the accident. The first 4-month doses were less than 2 mSv for most (94%) study subjects. Later on, individual doses came to be monitored by personal dosimeter measurements. On the basis of these measurements, the estimated median annual external dose was reported to be < 1 mSv in 2011 for 22 municipalities of Fukushima Prefecture. Internal dose estimation also can be categorized as taking two approaches: estimation from whole-body counting and estimation from monitoring of environmental samples such as radioactivity concentrations in food and drinking water. According to results by the former approach, committed effective dose due to ¹³⁴Cs and ¹³⁷Cs could be less than 0.1 mSv for most residents including those from evacuated areas. Conclusion: Realistic doses estimated by Japanese scientists indicated that the doses reported by WHO and UNSCEAR were generally overestimated. Average values for the first-year effective doses for residents in two affected areas (Namie Town and Iitate Village) were not likely to reach 10 mSv, the lower end of the doses estimated by WHO.

• Asian Pacific Journal of Cancer Prevention
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• 제17권6호
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• pp.2973-2977
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• 2016

Opisthorchis viverrini is still a serious problem in Northeastern and Northern Thailand. Active surveillance is required to determine updated data for further prevention and control planning. Therefore, this study aimed to examine the prevalence and risk factors for O. viverrini in three provinces, Northeastern Thailand. A cross-sectional survey was conducted during October 2015 to March 2016 at Kaeng Sanam Nang district of Nakhon Ratchasima province, Waeng Noi district of Khon Kaen province, and Khon Sawan district of Chaiyaphum province, Thailand. Stool samples were examined by using a modified Kato-Katz Thick smear technique. From a total of 978 participants screened, O. viverrini infection was found in 1.74%, the majority opf positive cases being male (6.62%), age group 51-60 years old (4.21%), educated at primary school (8.43%), occupied with agriculture (9.62%),having an income <4,000 baht per month (4.82%), and living in Khon Sawan district (8.43%). Participants had a high knowledge level (42.43%), good attitude level (34.76%), and fair level (38.04%). The present study indicates the O. viverrini infection rate is low, but elderly males with primary school education involved in agriculture are still frequently effected particularly in Khon Sawan district. Therefore, this risk group requires behavior modification and continued monitoring.

• Composites Research
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• 제15권5호
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• pp.7-13
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• 2002

압전필름센서는 복합재 구조물의 저속충격응답을 관측하기에 우수한 특성을 지니고 있다. 본 연구에서는 Gr/Ep 복합재 적층판이 손상이 발생할 수 있을 정도의 충격에너지를 받았을 때 압전필름센서 신호를 이용하여 충격거동을 모니터링할 수 있는 가능성에 대하여 고찰하였다. 손상이 발생하지 않는 저에너지 충격조건부터 국부적인 손상을 유발할 수 있는 충격조건까지 압전필름센서가 부착된 Gr/Ep 복합재 적층판에 대하여 16가지의 저속충격시험을 수행하였다. 세 가지 조거의 충격시험에서 기지균열 및 층간분리 등의 국부적인 손상이 발생하였으나, 충격력과, 변위, 변형률, 압전센서 신호와의 관계를 이용한 선형해석 모델을 사용하여 충격하중에 의한 복합재 적층판의 응답을 예측하는 정방향 문제와 압전센서 신호로부터 충격력을 복원하는 역방향 문제에서 시험과 해석 결과는 비교적 잘 일치하는 경향을 보였다. 복원된 충격력으로부터 국부적인 손상이 발생할 정도의 충격까지는 압전필름센서 신호를 이용하여 충격력을 정확히 복원할 수 있음을 확인하였다.

• 한국터널지하공간학회 논문집
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• 제7권1호
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• pp.73-88
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• 2005

본 논문에서는 현재 암반 지하 구조물의 설계에 있어 사용되고 있는 접근법인 정량적 암반분류시스템, 시공중 암반 거동에 근거한 분류시스템 그리고 일반적인 정성적 설계 절차의 특징 및 장단점을 살펴보았으며, 이러한 설계 기법의 단점을 해결하기 위하여 제안된 오스트리아 터널 설계 가이드라인을 소개하고 국내의 경우와 비교하였다. 그 결과 기술적으로 안전하고 경제적인 터널 건설을 위해서는 불확실한 지반조건 및 환경조건에 매우 유연하게 대처할 수 있는 설계 및 시공 기술이 필요하다고 판단되며, 오스트리아 터널 설계 가이드라인에서 이와 관련된 기준을 제시하고 있다. 따라서 국내에서도 안전하고 경제적인 터널 건설을 위하여 시공중 계측 자료를 충분히 활용하여 실제 지반 조건을 예측하고 불확실한 지반 조건에 유연하게 대처할 수 있는 설계 및 시공 기술을 적용하는 것이 바람직하다고 사료된다.

• 성인간호학회지
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• 제28권2호
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• pp.237-245
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• 2016

Purpose: The aim of this study was to examine the effects of an Advanced Practice Nurse (APN)-led self-management program on cardiovascular health status among Korean women at risk of developing or progressing cardiovascular disease. Methods: This pilot study used one-group pre- and post- test experimental design. At health fairs in a community, 30 women who had one or more risk factors for metabolic syndrome were recruited and agreed to participate in the study. A total of 25 women completed the study. The intervention consisted of weekly follow-up calls and self-monitoring diary after an hour of individual counseling regarding risk factors, fast walking, and healthy diet tailored to the participants' needs. Physical activity was assessed with the World Health Organization International Physical Activity Questionnaire and a pedometer. Results: Participants showed statistically significant improvements in blood pressure, body mass index, levels of triglyceride, total cholesterol and low density lipoprotein, numbers of metabolic syndrome factors, and the 10-year CV risk estimate after one month of concentrated intervention. In addition, their physical activity behavior significantly improved after the intervention. Conclusion: This APN-led self-management program targeting modifiable risk factors by offering tailored counseling and concentrated support during the transition might be effective in preventing progression to the cardiovascular disease.

• 대한기계학회논문집B
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• 제40권4호
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• pp.255-262
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• 2016

철도차량의 안정성과 신뢰성을 위해 상시 자가진단 시스템의 필요성이 높아지고 있다. 통상적으로 이러한 모니터링 시스템에는 유선 센서가 쓰여 왔는데, 설치 장소의 제약이 적은 무선 센서의 활용과 유지보수의 문제를 위해서는 무선 센서의 전원 문제를 해결하여야 한다. 따라서 본 연구에서는 고속으로 주행하는 차량 주변의 에너지를 활용하여 친환경적이면서 반영구적인 자가 발전의 방편으로 열전 발전의 적용성을 검토하였다. 차량의 주행 조건에 따라 열전 발전 모듈이 설치될 차축 베어링 커버의 온도 차이에 대한 측정이 먼저 이루어졌고, 여기에 상용 열전 소자 모듈을 장착하여 그 성능을 테스트 하였다. 주어진 조건에서 출력을 높이기 위해 부하 저항 및 열전 소자 전용 회로를 적용하여 효과를 분석한 결과, 저온부의 효과적인 냉각 및 열손실의 최소화를 통해 열전 발전을 통한 무선 센서 전원 공급이 가능할 것으로 판단된다.

• 한국수자원학회논문집
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• 제35권5호
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• pp.583-595
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• 2002

본 연구에서는 월 Palmer 가뭄심도지수(PDSI)를 산정하여 목표지역을 중심으로 가뭄 관리 및 감시를 수행하고자 하였으며, 이에 이용한 자료는 1906년부터 1999년까지 94개년의 목포기상대 자료를 이용하였다. 월 Palmer 지수를 7개의 추계학적 등급으로 분류하고 마코프연쇄(markov chain)를 이용해 월전이확률을 산정함으로써 동적인 확률변화를 살펴보고자 하였으며, 가뭄의 정상상태확률 또한 산정하였다. 본 연구를 통하여 전체 7등급 중 가장 자주 발생하는 등급은 4등급으로 약 49.6%의 발생횟수론 기록하였으며 가장 극심한 7등급의 가뭄에서는 경험적 확률보다 추계학적 분석 확률이 다소 커지는 경향을 나타내었다. 또한, 월 정상상태확률은 장래 대상지역의 가뭄의 크기 변화 양상을 예측하는데 이용될 수 있을 것으로 판단되었다.

• 전기전자학회논문지
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• 제24권3호
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• pp.909-912
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• 2020

본 논문에서는 IT 기술을 바탕으로 반려동물에게 맞춤형으로 케어와 훈련을 제공하는 시스템을 소개한다. 먼저 비문 인식을 통해 특정 반려동물 개체를 인식하고, 펫 로봇이 반려동물을 유도하여 훈련기로 이동시킨다. 훈련기는 간식, 놀이, 클리커 등을 통해 동물을 훈련시키며, 애드온 디바이스를 추가하여 특정 훈련에 적합하도록 쉽게 확장할 수 있다. 펫 밴드는 바이털 모니터링, 집밖 탈출 방지, 운동량 측정 등을 수행한다. 이 시스템은 구성을 변경하여 분리 불안 완화, 배변 장소 유도, 특정 장소 출입금지 등 다양한 훈련 프로그램이 가능하며, 반려동물 행동을 각 개체별로 분석하여 맞춤형 훈련을 제공한다. 또한 주인이 없을 때에도 반려동물을 적절히 운동시키고 같이 놀아주며, 반려동물의 건강에 이상이 있으면 즉시 주인에게 알려준다.

• 한국환경독성학회:학술대회논문집
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• 한국환경독성학회 2002년도 추계국제학술대회
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• pp.156-156
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• 2002

The goal of this study is to develop a biomarker used in monitoring abnormal behaviors of Japanese medaka (Oryzias latipes) as a model organism caused by hazardous chemicals that are toxic and persistent in the ecosystem. A widely used insecticide, diazinon (O, O-diethyl O- (2-isopropyl-4-methyl-6-pyrimidinyl) phosphorothioate), is highly neurotoxic to fish, and it is also well known that it causes vertebral malformation and behavioral changes of fish at relatively low concentrations. The fish behaviors were observed on a real time basis using an image processing and automatic data acquisition system. The genes potentially involved in the abnormal behaviors were cloned using suppression subtractive hybridization (SSH) technique. The untreated individuals showed common behavioral characteristics. When the test fish was affected by diazinon at a concentration of 0.1 and 1 ppm, some specific patterns were observed in its behavioral activity and locomotive tracks. The typical patterns were enhanced surfacing activity, opercular movement, erratic movement, tremors and convulsions as reported previously. The number of genes up-regulated tty diazinon treatment were 97 which includes 27 of unknown genes. The number of down-regulated genes were 99 including 60 of unknown genes. These gene expression patterns will be analyzed by the artificial neural networks such as self organization map (SOM) and multilayer perceptron (MLP), revealing the role of genes responsible for the behaviors. These results may provide molecular biological and neurobehavioral bases of a biomonitoring system for diazinon using a model organism such as fish.

• Clinical and Experimental Pediatrics
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• 제60권11호
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• pp.337-343
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• 2017

Attention deficit hyperactivity disorder (ADHD) is one of the most common psychiatric disorders in childhood. This disorder, in addition to its main symptoms, creates significant difficulties in education, social performance, and personal relationships. Given the importance of rehabilitation for these patients to combat the above issues, the use of virtual reality (VR) technology is helpful. The aim of this study was to highlight the opportunities for VR in the rehabilitation of children with ADHD. This narrative review was conducted by searching for articles in scientific databases and e-Journals, using keywords including VR, children, and ADHD. Various studies have shown that VR capabilities in the rehabilitation of children with ADHD include providing flexibility in accordance with the patients' requirements; removing distractions and creating an effective and safe environment away from real-life dangers; saving time and money; increasing patients' incentives based on their interests; providing suitable tools to perform different behavioral tests and increase ecological validity; facilitating better understanding of individuals' cognitive deficits and improving them; helping therapists with accurate diagnosis, assessment, and rehabilitation; and improving working memory, executive function, and cognitive processes such as attention in these children. Rehabilitation of children with ADHD is based on behavior and physical patterns and is thus suitable for VR interventions. This technology, by simulating and providing a virtual environment for diagnosis, training, monitoring, assessment and treatment, is effective in providing optimal rehabilitation of children with ADHD.