• 로봇학회논문지
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• 제18권3호
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• pp.299-307
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• 2023

In the midst of accelerating wars around the world, unmanned robot technology that can guarantee the safety of human life is emerging. ERP-42 is a modular platform that can be used according to the application. In the field of defense, it can be used for transporting supplies, reconnaissance and surveillance, and medical evacuation in conflict areas. Due to the nature of the military environment, atypical environments are predominant, and in such environments, the platform's path followability is an important part of mission performance. This paper focuses on reducing the minimum turning radius in terms of improving path followability. The minimum turning radius of the existing 2WS/2WD in-wheel platform was reduced by increasing the torque of the independent driving in-wheel motor on the rear wheel to generate oversteer. To determine the degree of oversteer, two GPS were attached to the center of the front and rear wheelbases and measured. A closed-loop speed control method was used to maintain a constant rotational speed of each wheel despite changes in load or torque.

• 우주기술과 응용
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• 제3권2호
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• pp.165-198
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• 2023

2021년 국제 우주감시학회(AMOS)에 발표된 논문에 따르면, 저궤도 우주공간의 우주물체 간 충돌가능성은 작동중인 위성이 아니라 발사체 상단, 폐위성 등 우주 쓰레기에 의한 충돌확률이 높고, 우주교통관제(space traffic management)를 통해 그 충돌 가능성을 줄일 것을 제안하고 있다. 이러한 배경에 최근 우주공간에 위성 등 우주물체의 급속한 증가로 우주 쓰레기(debris) 문제가 국제적인 주요 도전과제로 부각되고 있고, 이에 지난 2022년 9월 뉴욕에서 열린 유엔총회에 한국을 포함한 유엔 회원국들이 수직발사식 위성요격미사일(anti-satellite, ASAT) 실험을 실시하지 않도록 하는 결의안 채택을 통해 전세계 8개국(23년 6월 기준 13개국)이 ASAT 실험을 실시하지 않기로 했다. 또한, 우주 쓰레기를 줄이기 위한 방안이 민간 분야에서 활발히 연구되고 있는데, 이러한 우주 쓰레기 상용서비스는 필요시 군사적으로도 사용이 가능할 것으로 판단된다. 이에 우주 쓰레기 제거기술 현황, 우주위협 평가 및 궤도 상 랑데부 및 근접기동작전 사례에 대해 알아보고, 우주 강국의 우주 쓰레기 제거기술을 활용한 우주무기 개발 개연성에 대해 고찰하겠다. 그리고 미래 우주전장을 대비하기 위한 우주기동전(space maneuver warfare) 이해를 통해 새로운 우주추진체계의 개발 필요성에 대해 제언하고자 한다.

• Pediatric Infection and Vaccine
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• 제21권2호
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• pp.114-120
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• 2014

목적: 본 연구에서는 6개월 미만의 영아를 대상으로 백일해의 기초적인 역학조사를 확인하고자 단일 기관에서 실시하였다. 방법: 2011년 10월부터 2013년 4월까지 분당 차병원에 내원한 진찰 당시 호흡기계 증상을 보여서 입원한 생후 6개월 미만의 영아들을 대상으로 비인두 흡입물로 B. pertussis PCR 또는 배양검사를 시행하였다. 또한 respiratory syncytial virus, adenovirus, metapneumo-virus, rhinovirus, parainfluenza virus, influenza A, B virus 포함한 호흡기 바이러스들에 대한 multiplex RT-PCR 검사를 시행 후 분석하였다. 결과: 대상 환아 수는 총 79례였으며 환아 연령 중앙값은 2개월이었고 대부분 진단은 급성 세기관지염(60%)이거나 폐렴(28%)이었다. B. pertussis 이 확인된 경우는 13례(16%)였으며 환아 연령 중앙값은 2개월이었다. B. pertussis 이 확인된 13례 중 7례(53%)에서 respiratory syncytial virus가, 1례(7%)에서 influenza A virus가 확인되었다. B. pertussis 이 확인된 13증례 중 DTaP 접종력 없는 증례는 6례(46%)이었고 DTaP 백신 1회 접종한 증례는 6례(46%)이었고 DTaP 백신 2회 접종한 증례는 1례(8%)이었다. 결론: 호흡기계 증상들을 보이는 입원한 생후 6개월 미만의 영아의 원인 병원체 중 B. pertussis 이 16%를 차지하였다. 6개월 미만의 영아들에 대한 향후 전국적인 다 기관이 포함된 역학적 감시 활동이 필요할 것으로 사료된다.

• 문화기술의 융합
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• 제10권2호
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• pp.167-172
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• 2024

21세기의 주요 전쟁에서 드론은 감시정찰을 넘어 정밀타격 또는 자폭공격, 인지전 등의 목적으로 지상 및 공중은 물론 해상 및 수중으로 그 영역이 확장되고 있다. 이러한 드론은 다영역작전을 수행할 것이며 이를 위해 자율화 수준을 향상하고 High-Low Mix 개념에 기반한 확장성을 강화하는 등의 발전을 이어 나갈 것이다. 최근 드론은 세계의 주요 전쟁에서 주요한 수단으로 활용되고 있으며 향후 게임체인저(Game-Changer)로 진화할 개연성이 충분해 보인다. 북한 또한 오래전부터 정찰 및 공격드론을 운용하기 위해 상당한 노력을 기울여 왔다. 북한은 근래에 들어 드론을 활용한 도발을 지속하고 있고, 그 능력도 점차 고도화되고 있다. 또한, 최근 새로운 전략 드론의 등장으로 이를 활용한 북한의 대남 감시정찰 및 조기경보 능력 확보와 새로운 유형의 도발 등 전·평시 위협이 강화될 것으로 보인다. 이에 이번 연구에서는 북한 전략 드론의 능력을 분석하고 운용 양상을 예측하여 시사점을 제공하고, 이후 우리 군의 드론 전력화 및 대드론체계 솔루션 등 종합적인 전략 수립에 대한 활발한 후속 연구가 이루어지길 바란다.

• 한국학교ㆍ지역보건교육학회지
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• 제8권1호
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• pp.13-27
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• 2007

The role of school as a key setting for health promotion practices should be empathized. However, there were limitations for the effectiveness of school health promotion practices in Korea because of the lack of recognition about its importance, social support, guiding principles of the school health promotion services by the school health related law, and cooperation between school and community. The purpose of this study was to analyse the advanced cases from The United States, Japan, Europe and Australia, and to evaluate the applicability to school health promotion services in Korea for establishing the strategy for effective implementation of school health promotion program in Korea. Four cases of school health program were selected for analysis, including Coordinated School Health Program and National School Health Strategies in the USA, Healthy Japan21, National School Health Initiative in Australia and the European Network of Health Promoting Schools. Major conclusions were as follows: 1. Advanced cases of school health programs were comprehensive in nature. 2. Integrated school and community health promotion efforts was emphasized. mostly. 3. Governmental agencies played an active role in conducting surveillance activities to monitor priority health risk behaviors, developing school health program and training manual, providing periodic program evaluation. 4. Life skill focused health education was the key component for the comprehensive school health program. For the improvement of efficiency in school health promotion practices, above advanced strategies for school health promotion program would be necessary.

• 대한소아치과학회지
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• 제26권1호
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• pp.146-150
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• 1999

치아발육시기의 항암치료는 치아에 영향을 줄 수 있으며 이에 대한 예상 및 적절한 치료계획수립이 필요하다. 본 증례에서 환자의 왜소치는 항암 화학요법과 관련되어 발생한 것으로 추정되며, 이에 대한 장기적 관찰 및 치료가 필요할 것으로 사료된다.

• 대한예방한의학회지
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• 제11권1호
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• pp.23-34
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• 2007

Health promotion program utilizing traditional korean medicine(TKM) is very unique modality uncommonly conducted throughout the world. Korea's TKM public health services went through initial stage from 2001 and spread throughout the country by 2003. 35 public health centers in the nation is appointed as 'TKM health promotion HUB' and in operation from 2007. But the program is still in the early state and evaluation of usage, satisfaction, and community service is still in demand. This study aims to verify current situations of TKM public health service by examining public awareness, usage, and satisfaction and suggest improvements based on findings. 2.5% of local residents were sampled and 1739 were chosen as subjects. Knowledge, attitude, satisfaction and others for TKM public health service were examined. TKM treatment service was most widely utilized(13.2%), followed by CVA prevention program(5.2%). For satisfaction level, CVA prevention program showed highest satisfaction(73.3%), closely followed by (Qi-gong program 63%). In general, awareness and utilization of TKM public health service were low but compensated by high satisfaction level. More active promotion and development of community specific programs should become available in the future.

• Clinical and Experimental Pediatrics
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• 제59권3호
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• pp.120-125
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• 2016

Purpose: Viral gastroenteritis among children is mainly caused by rotavirus, norovirus, astrovirus, or adenovirus strains. However, changing socioeconomic conditions and a rotavirus vaccination program may be affecting the prevalence of these viral infections. Therefore, we aimed to elucidate the season-specific trends in viral infections for facilitating prophylaxis and surveillance in our region. Methods: We evaluated 345 pediatric patients (203 males, 142 females; age, 1 month to 16 years) who visited the CHA Bundang Medical Center because of gastroenteric symptoms between June 2014 and May 2015. The specimens were simultaneously tested for norovirus, rotavirus, astrovirus, and adenovirus via multiplex reverse transcription polymerase chain reaction. Clinical characteristics of patients were analyzed retrospectively. Results: The most common virus was norovirus, followed by rotavirus, adenovirus, and astrovirus. Of all viral infections, 45.2% occurred mainly between 6 and 24 months of age; in particular, norovirus infection mostly occurred in all age groups except those below 6 months of age, when rotavirus was most prevalent. In addition, seasonal variation was observed, such as norovirus infection from December to February, rotavirus infection from February to April, and adenovirus infection from July to October. Conclusion: Our results showed that the most common cause of acute pediatric viral gastroenteritis had changed from rotavirus to norovirus in our patients, because of effective rotaviral vaccination. We recommend the management of food and personal hygiene in accordance with age or seasons as well as active vaccination for preventing viral gastroenteritis.

• Journal of Yeungnam Medical Science
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• 제14권2호
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• pp.467-473
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• 1997

저자들은 1994년에서 1995년 사이에 경기도 북부 휴전선 부근에서 말라리아가 유행할 때 그 지역에서 근무하고 제대한 후에 외국 여행이나 수혈의 경력이 없는 젊은 남자에서 오한과 동반된 발작적 발열 등의 임상 증상과 말초 혈액 도말 검사에 의해 삼일열 말라리아로 확진되어 치료한 8예를 경험하였다. 삼일열 말라리아의 재정착이 확인되었으므로 오한을 동반한 발열 환자의 원인으로서 말라리아가 반드시 고려 대상이 되어야 하며 말라리아 재유행에 대한 조사와 함께 감시 대책이 필요하리라 생각된다.

• Journal of Preventive Medicine and Public Health
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• 제29권2호
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• pp.331-346
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• 1996

Exploring the epidemiological trend of HIV/AIDS is required for making the national AIDS policy. In this study, the trend of HIV/AIDS incidence, rout of transmission and some characteristics of AIDS for the past 11 years in Korea using the reported cases from the national STD screening scheme were reviewed. Based on the results, the trend of main route of transmission according to the year was established by stage and the HIV/AIDS cases in this year was estimated and that to the year 2000 was projected by 'Epimodel' programme. The results were as follows : 1. Of the total infected persons, 76% were in their twenties and thirties, socioeconomically and sexually active age groups. While the transmission by sexual contact overseas was decreasing, the infection through domestic heterosexual and homosexual contact was increasing. 2. In the middle of the 1980's, the infected persons were mainly prostitutes infected through heterosexual contact with the HIV positive foreigner in this county(stage 1). And in the late of the 1980's the main source of infection was the sexual contact overseas and the domestic heterosexual contact(stage 2). Since the early of the 1990's, the infection through the heterosexual contact with non-regular sexual partner in this country has increased rapidly(stage 3), which was the evidence of the possibility of HIV epidemics. After that, it was expected that the infection through the homosexual contacts, the heterosexual contacts with commercial sex workers outside and the non-regular sexual contact inside of this country would increase continuously. In the result, the occurrence of neonatal infection by vertical transmission was expected(stage4). 3. The number of HIV/AIDS was estimated at 572 to 2,313 and the projected number of HIV/AIDS to the you 2000 was around 5,800 including 627 AIDS patients. For the further study on the estimation and projection of HIV/AIDS, it was suggested that the sampling survey on the HIV infection rate in the high risk groups and the sentinel hospital surveillance system should be conducted.