서울 약수터의 지표세균 분포 및 16S rRNA 염기서열을 이용한 총대장균군 동정 및 계통분석

윤태호,이향,최금숙,이승주,이목영,어수미,Yoon, Tae-Ho,Lee, Hyang,Choi, Geum-Sook,Lee, Seung-Joo,Lee, Mok-Young,Eo, Soo-Mi 한국환경보건학회 2013 한국환경보건학회지 Vol.39 No.6

Objectives: This study was performed in order to detect indicator bacteria in drinking spring water (DSW) samples in Seoul Metropolitan City, and to identify their genus through 16S rRNA sequencing and then assessing the genetic relation of their strains. Methods: For indicator bacteria detection and identification of total coliforms, we analyzed DSW between the spring and summer seasons. In particular, DSW samples were chosen from sites repeatedly found unsatisfactory in recent years. Results: Heterotrophic plate counts of DSW in the spring and summer season were investigated in the range of 0-550 and 0-800 CFU/mL, respectively. Total coliforms of these were 0-1,900 and 0-2,100 CFU/100mL, fecal coliforms were 0-600 and 0-550 CFU/100mL, and Escherichia coli were 0-7 and 0-326 MPN/100mL. The detection ratio of fecal pollution indicators and that of fecal coliforms increased to 58.6% in the summer from 12.5% in the spring and Escherichia coli increased to 51.4% from 4.7%. As a result of genetic analysis on the isolated bacteria, the genus of total coliforms was classified in the order of Enterobacter spp. 12.7%, Serratia spp. 7.3%, E. hermanii 6.4%, Rahnella spp. 5.5%, Hafnia spp. 4.5%, Escherichia coli 3.6%, Klebsiella spp. 3.6% in the spring season. In the summer season, it was classified in order of Klebsiella spp. 16.6%, Enterobacter spp. 13.0%, Escherichia coli 11.0%, Serratia spp. 8.6%, Raoultella spp. 7.0%, Kluyvera spp. 5.6% and Citrobacter spp. 3.0%. Conclusions: The increase of fecal pollution in summer indicates that special attention to drinking DSW is required.

대장균의 전기투석배양

윤태호,김인호 ( Tae Ho Yoon,In Ho Kim ) 한국화학공학회 1995 화학공학의이론과응용 Vol.1 No.1

양극산화처리를 통한 다공성 임플랜트 표면의 표면거칠기 증대에 대한 연구

윤태호,송광엽,Yoon, Tae-Ho,Song, Kwang-Yeob 대한치과보철학회 2006 대한치과보철학회지 Vol.44 No.5

Statement of problem: HA has been used as a coating material on Ti implants to improve osteoconductivity. However. it is difficult to form uniform HA coatings on implants with complex surface geometries using a plasma spraying technique. Purpose : To determine if Ti6Al4V sintered porous-surfaced implants coated with HA sol-gel coated and hydrothermal treated would accelerate osseointegration. Materials and Methods : Porous implants which were made by electric discharge were used in this study. Implants were anodized and hydrothermal treatment or HA sol-gel coating was performed. Hydrothermal treatment was conducted by high pressure steam at $300^{\circ}C$ for 2 hours using a autoclave. To make a HA sol, triethyl phosphite and calcium nitrate were diluted and dissolved in anhydrous ethanol and mixed. Then anodized implant were spin-coated with the prepared HA sols and heat treated. Samples were soaked in the Hanks solution with pH 7.4 at $37^{\circ}C$ for 6 weeks. The microstructure of the specimens was observed with a scanning electron microscope (SEM), and the composition of the surface layer was analyzed with an energy dispersive spectroscope (EDS). Results : The scanning electron micrographs of HA sol-gel coated and hydrothermal treated surface did not show any significant change in the size or shape of the pores. After immersion in Hanks' solution the precipitated HA crystals covered macro- and micro-pores The precipitated Ca and P increased in Hanks' solution that surface treatment caused increased activity. Conclusion : This study shows that sol-gel coated HA and hydrothermal treatment significantly enhance the rate of HA formation due to the altered surface chemistry.

우리나라 건강불평등 해소를 위한 정책 제안

윤태호,Yoon, Tae-Ho 대한예방의학회 2007 예방의학회지 Vol.40 No.6

Although the New National Health Promotion Plan 2010 target to reduce health inequalities, whether the program will be effective for reducing the health inequalities in Korea remains quite unclear. More and more developed countries have been started to concentrate on comprehensive policies for reducing health inequalities. The health policies of the UK, Netherlands, and Sweden are the most wellknown. I propose that a comprehensive blueprint for tackling health inequalities in Korea should be made and that it must contain five domains: a target, structure and process, life-course approach, area-based approach, and reorganization of health care resources. The target should be based on determinants of health and more attention should be paid to socioeconmic factors. The structure and process require changes from the national health care policy based on medical services to the national health policy that involves the establishment of a Social Deputy?Prime Minister and the strengthening multidisciplinary action. A life-course approach especially focused on the early childhood years. Area-based approach such as the establishment of healthy communities, healthy schools, or healthy work-places which are focused on deprived areas or places is also required. Finally, health care resources should be a greater investment on public resources and strengthening primary care to reduce health inequalities. The policy or intervention studies for tackling health inequalities should be implemented much more in Korea. In addition, it is essential to have political will to encoruage policy action.

무선 메쉬 네트워크 기반의 다층구조 감시 시스템 구축

윤태호,송유승,Yoon, Tae-Ho,Song, Yoo-Seoung 대한임베디드공학회 2012 대한임베디드공학회논문지 Vol.7 No.5

In the present, Wireless Sensor Network(WSN) has been used for the purpose of the military operation with surveillance systems and for collecting useful information from the natural environment. Basically, low-power, easy deployment and low cost are the most important factors to be deployed for WSNs. Lots of researches have been studied to meet those requirements, especially on the node capacity and battery lifetime improvements. Recently, the study of wireless mesh networks applied into the surveillance systems has been proceeded as a solution of easy deployment. In this paper, we proposed large-scale intelligent multi-layer surveillance systems based on QoS assuring Wireless Mesh Networks and implemented them in the real testbed environment. The proposed system explains functions and operations for each subsystem as well as S/W and H/W architectures. Experimental results are shown for the implemented subsystems and the performance is satisfactory for the surveillance system. We can identify the possibility of the implemented multi-layer surveillance system to be used in practice.

지능형 사건 처리를 강조한 협업 감시 시스템

윤태호,송유승,Yoon, Tae-Ho,Song, Yoo-Seoung 대한임베디드공학회 2012 대한임베디드공학회논문지 Vol.7 No.6

Security and monitoring system has many applications and commonly used for detection, warning, alarm, etc. As the networking technology advances, user requirements are getting higher. An intelligent and cooperative surveillance system is proposed to meet current user demands and improve the performance. This paper focuses on the implementation issue for the embedded intelligent surveillance system. To cover wide area cooperative function is implemented and connected by wireless sensor network technology. Also to improve the performance lots of sensors are employed into the surveillance system to reduce the error but improve the detection probability. The proposed surveillance system is composed of vision sensor (camera), mic array sensor, PIR sensor, etc. Between the sensors, data is transferred by IEEE 802.11s or Zigbee protocol. We deployed a private network for the sensors and multiple gateways for better data throughput. The developed system is targeted to the traffic accident detection and alarm. However, its application can be easily changed to others by just changing software algorithm in a DSP chip.

중공형 EPP 어업 부표 개발을 위한 내충격성 인증 시험에 대한 시뮬레이션 검토

윤태호(Tae Ho Yoon ),홍정우(Jeongwoo Hong) 대한기계학회 2017 대한기계학회 춘추학술대회 Vol.2017 No.5

RC보의 손상상태에 따른 CFS의 휨 보강효과에 관한 연구

윤태호 ( Yoon Tae-ho ),윤정근 ( Yoon Jeong-gun ) 한국구조물진단유지관리공학회 2006 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.10 No.1

In this study conformed section analysis program considering stress status of tension bars and concrete by loads acting on the original member at strengthening, and compared with Sin Yeong-Soo and Hong Geon-Ho formula in ordinary analysis program which is much used at strengthening design. After carrying out variation analysis with strengthening fly of CFS, the ratio of tensile reinforcement, the ratio of section dimension, _found out the change of øMn depend on reinforcing step, with the result of this analysis, and phen draw the reducing design flexural strength formula depend upon the reinforcing time .

병렬전단벽의 강도와 강성이 커플링보의 설계내력에 미치는 영향

윤태호(Tae-Ho Yoon),김진상(Jin-Sang Kim) 한국산학기술학회 2016 한국산학기술학회논문지 Vol.17 No.10

본 연구에서는 초고층건물의 횡력저항 구조형식으로 널리 사용되는 병렬전단벽-커플링보 구조시스템에서 전단벽의 강도, 강성이 커플링보의 설계 강도에 미치는 영향을 분석하였다. 커플링보에 발생하는 설계내력은 코어벽체의 두께와 콘크리트의 강도가 변하더라도 층별 설계내력은 유사한 경향을 보이고 있으며, 벽체 콘크리트 강도와 두께에 따라 커플링보에 발생하는 외력은 다소 감소하는 경향이 있다. 커플링보의 설계내력은 6개 모델 전부 40층 건물에서, 10층에서 15층의 범위에서 가장 높게 발생하고 있음을 알 수 있다. 즉, 병렬전단벽의 휨변형 변곡점이 형성되는 건물높이의 0.25H~0.375H 위치에서 최대 부재력이 발생한다. 벽체두께가 증가 할수록 코어내부의 커플링보의 발생 외력은 점차 증가하는 것으로 확인되었다. 또한 벽체 두께가 두꺼워질수록 벽체의 콘크리트 강도 증가에 따른 커플링보의 부재력 변화는 적게 나타나는데, 이는 벽체두께가 두꺼우므로 콘크리트 강도변화의 영향이 적게 미치는 것으로 분석된다. 병렬전단벽의 두께증가는 콘크리트의 강도증가보다 강성변화에 큰 영향을 미치고, 이에 따라 커플링보의 부재력 변화에도 더 큰 영향을 미치는 것으로 분석된다. In this research, the effects of the strength and stiffness of shear walls on the design strength of coupling beams are studied in the shear wall-coupling beam structural system widely used as the lateral-drift resistant system of high-rise buildings. The results show that the design strength of the coupling beams decreases with decreasing concrete strength and core wall thickness, but the shape remains unchanged. In all six models, the design strength of the coupling beams has the largest value at the 10~15th floors in a 40-story building. In other words, the design strength of the coupling beams has the largest value at 0.25H~0.375H where the inflection point exists. The thicker the walls, the smaller the change in the member forces. The thickness of the coupled shear walls has more influence on the design strength of the coupling beams than the concrete strength.

장애 유형별 의료서비스 이용의 차이

윤태호 ( Tae Ho Yoon ),정백근 ( Baek Geun Jeong ),강윤식 ( Yune Sik Kang ),이상이 ( Sang Yi Lee ),김철웅 ( Chul Woung Kim ) 한국보건행정학회 2007 보건행정학회지 Vol.17 No.2

The disabled population is a vulnerable group, having very complex medical conditions, but little is known about differences in the level of access by type of disability. This study was performed to investigate the differences of health care utilization by the type of disability. The database was constructed from registry of the disabled and health insurance and medical aid claims data submitted to the Korea Health Insurance Cooperation during in the year 2003. The disability classified three groups according to the Disabled Welfare Act; physically disability with external dysfunction, physically disability with organic disease, and mentally disability. There were huge differences in health care utilization by the type of disability. For the inpatient care, those with a mental disability were more likely to utilize health care services in terms of average visit number of medical facilities and visit days per case, but the treatment amount per case was the highest in physically disabled with organic disease. For the outpatient care, those who the physically disabled with organic disease were more likely to utilize health care services in terms of average visit number of medical facilities, treatment amount per case, and the treatment days per case. Also, those who physically disbled with organic disease were more likely to utilize general hospital for both inpatient and outpatient care, and spent more out-of-pocket expenditure. As the number of persons with disabilities rises, the need to consider new approaches to protecting their health grows increasingly. Especially, Korean health care system should be refined to be more responsive to the needs of the type of disability.