정사각 단면을 가진 덕트에서 덕트 내부 배플의 형상 및 위치 변화에 따른 90° 분기덕트의 유량변화 연구

김원형(Won Hyoung Kim) 대한기계학회 2016 대한기계학회 춘추학술대회 Vol.2016 No.12

In the cross-section duct, change of flow rate at the 90° branch duct in accordance with change of the shape and position of a baffle was studied. The characteristics of the flow rate at the 90°branch duct was confirmed According to changes in the inlet flow rate. As the inlet flow velocity increased, the distributed flow rate in branch ducts showed a decrease in power form. In addition, it was confirmed that can adjust the distributed flow rate in the branch duct within a certain range according to the position and shape of the baffle while maintaining the same size in the duct.

COVID-19 시대의 스트레스 관리

김원형(Won-Hyoung Kim) 한국항공우주의학협회 2020 항공우주의학회지 Vol.30 No.3

HTML5 기반 인터넷 투표 시스템

김원형 ( Won-hyoung Kim ),변정용 ( Jeongyong Byun ) 한국정보처리학회 2012 한국정보처리학회 학술대회논문집 Vol.19 No.2

웹의 점진적 발전에 맞춰 웹 프로그래밍 언어도 계속적으로 발전해 나아가고 있으며, 기존 HTML에서 더욱 진화된 HTML5는 다양한 멀티미디어 기능과 그래픽 효과를 표현할 수 있다. 최근 각 분야에서 인터넷 활용이 점점 증가하고 있는데, 투표방식에서도 전통적인 방식에서 인터넷을 활용한 인터넷투표 방식을 도입하려는 사례가 늘어가고 있다. 인터넷 투표는 부정투표와 같은 보안적 문제점이 있는데, 본 논문에서는 HTML5를 기반으로 JSP를 이용하여 인터넷 투표의 보안성을 강화하고 HTML5에기반 한 기술을 활용하여 시스템을 구축하였다.

고온 운용환경을 고려한 해군 함정용 다기능콘솔 공기소음의 실험적 검토

김원형(Won-Hyoung Kim),신승민(Seung-Min Shin),최영철(Young-Cheol Choi),성준영(Joon-Young Sung) 대한기계학회 2020 대한기계학회 춘추학술대회 Vol.2020 No.12

This paper describes, as a way to meet the air noise standards, setting the air flow path inside the equipment and setting the operating RPM of the cooling DC fan to meet the air noise standards of MFC that is developed to be operated in a high-temperature environment. There are numbers of DC fans installed in order to solve the heat generation in the main flow path in the MFC. In this study, it was largely classified into three groups of device (1), device (2), and console top. Due to the complexity, it was confirmed that the DC fan installed in the console top group had the highest noise impact. Based on the experimental results of this study, the flow path in the MFC was set and the maximum operating RPM of the DC fan installed on the flow path was set so as to meet the strictest standards.

심리외상 이후의 신체증상

박주언,안현의,김원형,Park, Joo Eon,Ahn, Hyun-Nie,Kim, Won-Hyoung 한국정신신체의학회 2016 정신신체의학 Vol.24 No.1

연구목적 심리외상에 노출된 이후 신체증상이 매우 빈번히 발생하곤 한다. 이러한 신체증상은 사회기능과 직업기능 및 환자-의사 관계와 종종 연관되지만 외상후스트레스장애 진단 범주에 포함되지 않은 상태이다. 본 논문에서는 이러한 신체증상의 기전, 흔한 임상양상, 그리고 치료에 대해 고찰하고자 한다. 방 법 PubMed, Scopus, Google Scholar, KoreaMed, KISS와 같은 학술검색엔진을 사용하여 2016년 3월 31일까지 검색된 심리외상 노출 이후 신체증상에 관한 자료를 바탕으로 연구하였다. 결 과 심리외상 노출 이후의 신체증상의 발생 기전은 심리적인 측면과 생리적인 측면으로 구분될 수 있었다. 심리기전은 정신역동이론, 인지행동이론, 그리고 다른 이론들이 포함되었다. 생리기전은 신경내분비 및 면역계, 자율신경계, 중추 신경계의 변화로 설명되었다. 심리외상과 연관된 신체증상은 두경부, 흉부, 복부, 기타 근골격계, 피부 및 면역계에서 나타나는 다양한 건강문제로 표현되었다. 이러한 신체증상의 표준화된 치료에 대한 연구는 매우 부족하였다. 결 론 임상의와 재난정신건강지원 실무자는 심리외상에 대한 개입이나 PTSD 치료 동안 동반된 신체증상에 대해 항상 염두에 두어야 한다. 심리외상과 PTSD에서 보이는 이러한 신체증상에 대해 더 많은 연구가 진행될 필요가 있다. Objectives : Somatic symptoms after the exposure of psychological trauma frequently developed. However, the somatic symptoms are not covered under the diagnostic criteria of posttraumatic stress disorder(PTSD) in detail, although they are often associated with social and occupational functioning and patient-doctor relationships. The aim of this article is to highlight the potential mechanisms, the common manifestations, and the treatment of the somatic symptoms. Methods : This article studied the somatic symptoms searched using academic search engines like PubMed, Scopus, Google Scholar, KoreaMed and KISS from the earliest available date of indexing to March 31, 2016. Results : The mechanism of somatic symptoms after the exposure was described as psychological and physiological aspects. Psychological mechanism consisted of psychodynamic theory, cognitive behavioral theory, and others. Physiological mechanism involved changes in neuroendocrine and immune system, autonomic nervous system and central nervous system. Somatization associated with psychological trauma manifested various health conditions on head and neck, chest, abdominal, musculoskeletal, and dermatological and immune system. Few studies described the standardization of treatment for the somatic symptoms. Conclusions : Clinicians and disaster behavioral health providers should think of the accompanying somatic symptoms during intervention of psychological trauma and PTSD. Further studies are needed on the somatic symptoms seen in psychological trauma and PTSD.

전자장비 구조기인소음 저감방안의 실험적 검토

이성현,서윤호,김원형,최영철,Lee, Seong-Hyun,Seo, Yun-Ho,Kim, Won-Hyoung,Choi, Young-Cheol 한국음향학회 2014 韓國音響學會誌 Vol.33 No.2

본 논문은 전자장비의 구조기인소음 (structure-borne noise)의 실험적 저감방안 검토에 대한 내용을 다루었다. 수냉식 전자장비의 유일한 소음원인 냉각장치를 목업(mock-up)으로 제작하여 소음 특성을 파악하였으며, 전원에 의한 영향, 구조체 강성에 의한 영향, 팬 고정부위의 절연에 의한 효과, 마운트의 공진주파수가 미치는 영향 등에 대한 검토를 수행하였다. 이를 반영하여 제작된 전자장비 프로토타입의 소음 특성을 파악하였으며, 구조기인소음을 저감시키기 위하여 작동회전수(rpm) 조합, 마운트 종류 및 설치방법 등에 대하여 검토하였다. 냉각팬 작동 주파수의 1차, 4차 성분에 의하여 소음이 크게 발생하며, 구조체 강성증가, 팬 고정부위 절연, 마운트 공진주파수 저하, 작동회전수조합, 마운트 선정방법 등에 의하여 전자장비의 구조소음을 저감시킬 수 있음을 확인하였다. In this paper, the structure-borne noise reduction on electrical equipment is discussed by the experimental analysis. The water cooling system in electrical equipment is the only noise source, so the mock-up was made to measure noise characteristics. Effects of power supply, stiffness, isolation of noise source and natural frequency determined by resilient mounts are investigated using the mock-up. The console prototype was made referring to noise reduction technique by the mock-up. The structure-borne noise level of a console prototype was measured and some experiments to reduce the noise was undertaken. The $1^{st}$ and $4^{th}$ harmonics of operating frequency of cooling fans causes highest structure-borne noise levels. The control of operating speeds of several DC cooling fan groups was tried. Also types and installation layouts of resilient mounts were investigated. To reduce structure-borne noise, followings can be applied: increase of stiffness, isolation of source, decrease of natural frequency of mount, combination of operating speed of fans, selection of mounts, and so on.

팔리페리돈 장기지속형 주사제 중단에 영향을 미치는 인자

오승민(Seung-Min Oh),김원형(Won-Hyoung Kim),신준환(Jun-Hwan Shin),김지현(Ji-Hyun Kim),이정섭(Jeong-Seop Lee),배재남(Jae-Nam Bae),김철응(Chul-Eung Kim) 대한생물치료정신의학회 2017 생물치료정신의학 Vol.23 No.3

Objectives:Paliperidone palmitate long-acting injection(PP) is an effective and broadly well tolerated treatment in practice. The aim of this study was to determine factors relating to discontinuation with treatment with PP, we analyzed the time course and causes of PP discontinuation that occurred in 12 months period in a clinical setting. Methods:Retrospective database of 81 patients with schizophrenia were reviewed for analyzing the duration of PP and the reasons for discontinuation(from June 2011 to November 2016), with the motives for discontinuation coded. The causes for termination were analyzed. Results:Overall, 58% patients discontinued PP beyond 12 months from initiation. The common reasons for discontinuation were follow-up loss(42.5%), no effect(19.1%), side effect(19.1%). extrapyramidal symptom accounted for 44.4% of all side effect inducing discontinuation. Pain, somnolence accounted for 22.2% of side effect, respectively. Inpatient initiation, switched from risperidone, risperidone long-acting injection(LAI), compliance before injection, hospitalization during treatment course, GAF score at last LAI, CGI-S at last LAI were associated with discontinuation on univariate analysis. However, only hospitalization during treatment course was independently associated with discontinuation on multivariate analysis. Conclusion:Hospitalization after PP was associated with 12-month PP discontinuation. Prospective researches using more objective tools are needed to clarify the reasons for PP discontinuation.

국가 치매조기검진을 통해 진단된 치매 환자의 약물치료 순응도 추적

노지현(Ji Hyun Roh),김원형(Won-Hyoung Kim),김지현(Ji-Hyun Kim),이정섭(Jeong-Seop Lee),김철응(Chul-Eung Kim),배재남(Jae-Nam Bae) 대한노인정신의학회 2015 노인정신의학 Vol.19 No.2

Objective:This study examined medication adherence rate and associated factors with medication adherence in patients who had been diagnosed as having dementia through the nationwide project for early detection of dementia in South Korea. Methods:This study enrolled a total of 131 patients, who were diagnosed as having dementia through utilization of the Kore-an version of the Consortium to Establish a Registry for Alzheimer’s Disease Assessment Packet at the Namgu Dementia Center in Incheon, from January 1, 2012 through December 31, 2012. Telephone interview was done with principal caregivers of demen-tia patients at least 18 months after they had been diagnosed. Results:Out of 131 patients, 83 caregivers of patients completed telephone interview. 62 (72.9%) patients were currently be-ing treated with antidementia drugs, and the proportion of patients being treated at the psychiatric clinic was 54.8%. Sociodemo-graphic variables and clinical rating scales included in the study had no statistically significant effect on the medication adher-ence. The most common cause of nonadherence was a misconception of dementia diagnosis and treatment (28.6%). Conclusion:The major cause of nonadherence was a misconception of dementia diagnosis and treatment, therefore, education on misconception may enhance a patient’s medication adherence. Sociodemographic variables and clinical rating scales included in the study had no statistically significant effect on the medication adherence.

재난정신건강 평가도구

박주언,강석훈,원성두,노대영,김원형,Park, Joo Eon,Kang, Suk-Hoon,Won, Sung-Doo,Roh, Daeyoung,Kim, Won-Hyoung 대한불안의학회 2015 대한불안의학회지 Vol.11 No.2

Objectives : After disaster, some people develop posttraumatic stress sequelae such as posttraumatic stress disorder (PTSD), major depression, substance use disorders, and suicide. To date, numerous screening and assessment tools for behavioral health issues including mental health problems, psychosocial maladjustment and status of recovery after disaster have been developed. In this condition, one of important topics is to choose instruments that can quickly and accurately measure the issues. Methods : This article reviewed several self-reported scales in adults for disaster behavioral health, which were searched using academic search engines like PubMed, Scopus, KoreaMed and KISS from the earliest available date of indexing through January 31, 2015. Results : More than 40 eligible instruments evaluating the disaster behavioral health issues containing posttraumatic stress sequelae, psychological and social resources, non-disaster stress, and general functions were presented in terms of availability, effectiveness, and expeditiousness. Also, we introduced basic frame aiming on practical usage, which includes standard version and brief version of the instruments for disaster behavioral health. Conclusion : We suggest the accessibility and the applicability of assessment instruments for disaster behavioral health. The systemic review of this article will provide further directions for them. 재난 경험자들의 정신건강은 개인적인 측면뿐만 아니라 재난 이후의 지역사회의 회복 측면에서 매우 중요하기 때문에 개인적 수준과 사회적 수준 양쪽에서 접근해야 한다. 또한 재난 경험자들을 이해하고 돕기 위해서는 PTSD, 우울, 불안과 같은 정신 건강 분야뿐만 아니라 심리적 및 사회적 자원 분야, 물질남용 및 중독 분야, 비재난스트레스 분야, 기능상태 분야 등 다양한 방면의 평가가 필요하다. 재난정신건강 평가를 위해서 최소한 1시간 이내에 평가할 수 있는 표준 버전과 30분을 넘지 않는 단축 버전과 같은 기본적인 패키지가 필요하다. 임상 현장보다 재난 현장에서 시간 및 비용이 더 중요한 요소이고 재난 현장의 특성상 실현 가능성도 고려하여야 하기 때문에 이 모두를 고려한 구성을 해야 한다. 적극적인 재난정신건강의 다면적 평가를 통해 조기에 위험군을 선별하고 이를 적절히 관리한다면 재난 이후에 발생하는 외상후스트레스후유증을 최소화할 수 있을 것이다.

IR 카메라에 적용된 냉각기 MTTF개선 연구

정윤식 ( Yunsik Jung ),김진환 ( Jin Hwan Kim ),박중용 ( Jung Yong Park ),김원형 ( Won Hyoung Kim ) 한국품질경영학회 2017 한국품질경영학회 학술대회 Vol.2017 No.2