마이크로 BGA 패키지의 볼 형상 시각검사를 위한 모아레 간섭계 기반 3차원 머신 비젼 시스템

김민영,Kim, Min-Young 한국마이크로전자및패키징학회 2012 마이크로전자 및 패키징학회지 Vol.19 No.1

본 논문에서는 마이크로 BGA 패키지 내외부의 마이크로 볼의 3차원 형상을 측정하는 광학 측정 시스템을 제안하고 이를 구현한다. 대부분의 시각 검사 시스템은 마이크로 볼의 복잡한 반사 특성 때문에 검사에 어려움을 겪고 있다. 정확한 형상의 측정을 위해서, 특별히 설계된 시각 센서 시스템을 제안하고, 위상이송 모아레 간섭계의 측정원리에 기반한 형상측정 알고리즘을 제안한다. 센서 시스템은 4개의 서브시스템을 보유한 패턴 투사 시스템과 영상획득 시스템으로 구성된다. 패턴 투사용 서브시스템은 공간상으로 서로 상이한 투사 방향을 가지며, 이는 측정 물체에 각기 다른 입사 방향을 가지는 패턴 조명이 투사될 수 있도록 하는 것을 목적으로 한다. 위상이송 모아레 간섭계의 구현을 위한 정밀 위상이송을 위해서, 각 서브시스템의 패턴 격자는 PZT 구동기를 이용하여 일정 간격으로 이송한다. 최종적으로 측정되는 마이크로 볼의 경면반사와 그림자 영역을 효과적으로 제거하기 위해서, 다중 패턴 투사 시스템과 영상획득 시스템을 구현하고, 이를 테스트한다. 특히, 다중 프로젝션을 이용하여 획득되는 다중 높이 정보를 효과적으로 융합하기 위하여, 베이지안 센서 융합 이론을 기반으로한 센서 융합 알고리즘이 제안된다. 제안되는 시스템의 원리검증과 성능확인을 위해, 마이크로 BGA볼과 기판 범프의 측정대상물에 대해서, 측정 반복성을 중심으로 실험이 수행되었으며, 획득된 실험 결과를 분석하고 논의한다. This paper focuses on three-dimensional measurement system of micro balls on micro Ball-Grid-Array(BGA) packages in-line. Most of visual inspection system still suffers from sophisticate reflection characteristics of micro balls. For accurate shape measurement of them, a specially designed visual sensor system is proposed under the sensing principle of phase shifting moire interferometry. The system consists of a pattern projection system with four projection subsystems and an imaging system. In the projection system, four subsystems have spatially different projection directions to make target objects experience the pattern illuminations with different incident directions. For the phase shifting, each grating pattern of subsystem is regularly moved by PZT actuator. To remove specular noise and shadow area of BGA balls efficiently, a compact multiple-pattern projection and imaging system is implemented and tested. Especially, a sensor fusion algorithm to integrate four information sets, acquired from multiple projections, into one is proposed with the basis of Bayesian sensor fusion theory. To see how the proposed system works, a series of experiments is performed and the results are analyzed in detail.

PVA 섬유와 탄소섬유의 첨가가 섬유강화 시멘트의 물성에 미치는 영향

김민영,이준석,전한용,Kim, Min-Young,Lee, Joon-Seok,Jeon, Han-Yong 한국섬유공학회 2007 한국섬유공학회지 Vol.44 No.1

The effect of PVA (polyvinylalcohol) fiber and carbon fiber addition on the mechanical properties of the fiber reinforced cement was studied. The experimental variations were fiber length (3, 6, 9 mm) and fiber weight fraction (0.25, 0.5, 0.75, 1.0 wt%). The compressive, tensile and flexural strength of the PFRC (PVA fiber reinforced cement) and CFRC (carbon fiber reinforced cement) tend to increase with the addition of the fiber. The compressive strength of PFRC was the highest when the length of PVA fiber was 3 mm, and that of CFRC was the highest when the length of carbon fiber was 6 mm. The tensile and flexural strength of PFRC and CFRC were increased with increase of the fiber length and fiber content.

한방 치료와 자하거약침을 병행하여 치료한 극상근건염 및 삼각근하 점액낭염 환자 4례 증례보고

김민영,최영일,최희승,정윤규,추원정,이차로,남항우,Kim, Min-Yeong,Choi, Young-Il,Choi, Hee-Seung,Jung, Yoon-Gyoo,Choo, Won-Jung,Lee, Cha-Ro,Nam, Hang-Woo 대한한의정보학회 2011 大韓韓醫情報學會誌 Vol.17 No.2

Objectives : The purpose of this case series is to investigate and report the effectiveness of oriental medicine treatment and Hominis placenta pharmacopuncture treatment for supraspinatus tendinosis and subdeltoid bursitis. Methods : 4 patients are admitted at Dept. of Oriental Rehabilitation Medicine, Bu-Cheon Jaseng Oriental Medicine Hospital, diagnosed as supraspinatus tendinosis and subdeltoid bursitis and treated with oriental medicine treatment and Hominis placenta pharmacopuncture. Each case is measured and assessed daily by NRS(Numeric Rating Scale) score and shoulder physical exam. Results : After treatment, patients' shoulder pain are decreased and they showed nearly full ROM(range of movement). In patients with supraspinatus tendinosis and subdeltoid bursitis, oriental medicine treatment and Hominis placenta is good method for pain relief and better movement. Conclusions : As seen in these 4 cases of supraspinatus tendinosis and subdeltoid bursitis, oriental medicine treatment and Hominis placenta pharmacopuncture appears to be effective. 극상근건염 및 삼각근하 점액낭염으로 견관절의 통증과 이학적 검사 양성반응 및 ROM 제한을 호소하는 환자 4례에 대하여 한방 치료와 자하거약침 치료를 병행하였으며 그 결과 통증의 감소, 이학적 검사 소견의 개선 및 ROM 호전을 확인하였다.

유선망에서의 RTP/UDP/IP 헤더 압축 설계

김민영,홍고르촐,신병철,이인성,Kim Min-Yeong,Khongorzul D.,Shinn Byung-Cheol,Lee Insung 한국정보통신학회 2005 한국정보통신학회논문지 Vol.9 No.8

RTP(Real-Time Transport Protocol)는 실시간 데이터인 오디오/비디오나 IP 텔레포니, 멀티미디어 서비스 등을 위한 인터넷 표준 프로토콜이다. 20 ms 프레임 단위로 코팅하는 8kbps(또는 1K bytes/sec) 음성 코덱의 경우 패킷당 데이터 크기는 20바이트가 되며 RTP/UDP/IP 계층을 거치면서 각 계층의 헤더가 추가되어 전체 헤더 크기는 최소한 40 바이트나 되어 많은 부담이 된다. 이를 해결하기 위하여 point-to-point 상에서 여러가지 압축방법이 제시되었으며, 이 방법에서는 IP계층까지 헤더 압축을 하기 때문에 end-to-end 방식에서는 사용을 할 수 없다. 본 논문은 현재 라우터 기반의 유선망에 헤더 압축 기술을 적용할 수 있도록 기존에 설계된 헤더 압축기법을 수정하여 성능을 분석하였다. Real Time Transport Protocol (RTP) is the Internet standard protocol for transport of real time data audio/video IP Telephony, Multimedia Seivece. In case of 8kbps voice codec, the size of packet per data is 20bytes and become more large to minimal 40bytes with adding each layer's header in RTP/UDP/IP. To solve this problem, various header compression skill were suggested on point-to-point networks. But it compress even IP header and cannot be suitable to apply to end-to-end network Thus, We will renew header compression protocol to apply wired router-based network.

우리나라 골관절염 환자의 의료이용과 관련된 요인: 2005년 국민건강영양조사 자료를 이용하여

김민영,박종구,고상백,김춘배,Kim, Min-Young,Park, Jong-Ku,Koh, Sang-Baek,Kim, Chun-Bae 대한예방의학회 2010 예방의학회지 Vol.43 No.6

Objectives: The purpose of this study was to define the association between the medical utilization of osteoarthritis patient and its related factors. Methods: We used the 2005 Korean National Health and Nutrition Survey data and we enrolled 2833 participants who were forty or older and who were diagnosed as having osteoarthritis by a doctor within 1 year and who had suffered from osteoarthritis for more than 3 months. The Andersen behavioral model was used as the analytic framework, and the variables were categorized into predisposing, enabling, and need factors. To determine the influence of each variable on the medical utilization of osteoarthritis patient, we applied hierarchical logistic regression analysis with two stages: the first stage included the predisposing and enabling factors and the second stage included the need factors. Results: On the hierarchical logistic analysis, the variables of personal income, the type of medical security, the duration of arthritis related symptoms within 1 month, the subjective health status and the duration of osteoarthritis showed a statistically significant association with medical utilization in men. And the variables of age, limitation activity due to osteoarthritis, arthritis related symptoms within 1 month, and the subjective health status had a statistically significant association with medical utilization in women. Conclusions: The patients who tend to receive less care are those who suffer less from symptoms of osteoarthritis, those who are within the initial phase, or those with a low-level severity of osteoarthritis. It is necessary to encourage patients to receive the treatment in the initial phase.

부산지역 병원급식 조리종사자의 직무특성 및 직무만족이 조직몰입에 미치는 영향

김민영,류은순,Kim, Min-Young,Lyu, Eun-Soon 한국식품조리과학회 2016 한국식품조리과학회지 Vol.32 No.6

Purpose: This study was conducted to provide basic data for human resources management of hospital foodservice employees by determining their job characteristics, job satisfaction, and organizational commitment according to recent hospital environment changes. Methods: Our survey was administered to 248 hospital foodservice employees in Busan area from September 1 to September 25, 2014. A total of 158 questionnaires were used for final analysis. Results: The mean score of job characteristics showed significantly difference by work experience (p<0.001), annual salary (p<0.01), and cooking certification (p<0.05). Job satisfaction had significantly difference by the age (p<0.05), annual salary (p<0.001), and turnover intention (p<0.001). Organizational commitment showed significantly (p<0.001) difference by age, work experience, and annual salary. There was positive correlation (p<0.001) between organizational commitment and job characteristics, job satisfaction. Organizational commitment had significantly positive correlation with skill variety (p<0.001), feedback (p<0.01), and task significance (p<0.001) of job characteristics, with work (p<0.001), pay (p<0.001), and co-workers (p<0.001) of job satisfaction. Job characteristics (${\beta}=0.249$, p<0.001) and job satisfaction (${\beta}=0.380$, p<0.001) had positive influences on the organizational commitment(p<0.001). In sub factors of job satisfaction, work (${\beta}=0.291$, p<0.001) and pay (${\beta}=0.252$, p<0.01) had positive influences on organizational commitment. Conclusion: To develop the organizational commitment, hospital managers need to reinforce responsibility and fulfillment by job enrichment and to consider increasing salaries to get a higher satisfaction from foodservice employees.

기질적 섭식장애

김민영,Kim, Min-Young 대한소아소화기영양학회 2009 Pediatric gastroenterology, hepatology & nutrition Vol.12 No.suppl1

Pediatric dysphagia comes from disturbances in swallowing process, which has 'preparatory phase', 'oral phase', 'pharyngeal phase', and 'esophageal phase', and mainly the causes are neuro-muscular discoor-dination. It is necessary to recognize clinical manifestation if they have accompanied organic disorder and diagnose accurately. Videofluoroscopic study evaluation is a valuable method to find out abnormal swallowing mechanism at each phases. Treatment should be diagnosis specific, and multidisciplinary team approach is desirable. We can use various behavioral techniques to facilitate normal swallowing mechanism including conditioning of oral and pharyngeal structures, bolus manipulation, postural compensation, and adaptive feeding utensils. Important point is that the diagnosis and treatment for pediatric dysphagia should not be delayed because children are under development.

태양광 산업 시장동향 및 전망

김민영,임동건,Kim, Min-Yeong,Im, Dong-Geon 한국전기전자재료학회 2015 전기전자재료 Vol.28 No.3

치과 임플란트 상향식(bottom-up) 원가산정

김민영,최하나,신호성,Kim, Min-Young,Choi, Ha-Na,Shin, Ho-Sung 대한치과보철학회 2014 대한치과보철학회지 Vol.52 No.1

연구 목적: 본 연구의 목적은 가장 최근에 수행된 치과의원의 경영 분석 자료를 바탕으로 상향식 방법을 적용하여 임플란트 원가를 산정하는데 있다. 연구 재료 및 방법: 본 연구에서는 진료행위 각각에 소요되는 직간접 비용을 모두 합산하는 상향식 방식으로 산출하였다. 상향식 원가계산의 경우 총원가는 인건비, 재료비, 관리비, 의료사고비용, 투자자본의 기회비용 등으로 구성이 된다. 이를 임플란트 원가 구성요소로 구분하면 인건비, 기공료, 재료비, 감가상각비 등의 직접비용과 관리운영비를 포함하는 간접비용, 치과의원 투자분에 대한 기회비용으로 구성된다. 결과: 상부보철물의 종류에 따라 금속관일 경우 1,449천원, 도재관일 경우 1,583천원, 오버덴쳐의 경우 2,471천원으로 산정되었다. 임플란트 원가는 인건비, 재료비, 관리비, 기타비용으로 나누어지는데 총 원가 중 인건비가 차지하는 비율은 50%, 재료비 33%, 관리비 15%, 기타비용2%로 나타났다. 이를 직접비, 간접비, 투자비용으로 구분하면 상부 보철물이 금속관일 경우 각각 원가의 83%, 15%, 2%를 차지한다. 결론: 전체 원가 중 인건비가 73만원(약 50%)으로 가장 많은 비중을 차지한다. 상향식 원가계산 결과 관행수가에 근접하게 나타났는데 금속관의 경우 145만원, 도재관일 경우 158만원 추계되었다. Purpose: The purpose of this study was to estimate the cost of dental implant using the bottom-up approach with the current data from dental clinics. Materials and methods: In this study, direct and indirect costs required for each treatment were calculated using the bottom-up approach. In the bottom-up costing, the average monthly total cost of dental clinic includes labor and material costs, administrative expenses, medical malpractice costs, and opportunity costs of invested capital. For the dental implant cost components, those include direct costs (labor costs, laboratory costs, material costs, depreciation or other operating costs), indirect costs (administrative costs), and the opportunity costs of investment for dental clinic. Results: Dental implant costs of metal crown, porcelain crown and over-denture were 1,449,000 won, 1,583,000 won, and 2,471,000 won respectively. The proportion of cost components was as follows. The labor cost were 50%, and material, administrative and other cost were 33%, 15% and 2%, respectively. For direct, indirect and investment cost, the ratio were 83%, 15% and 2%, respectively. Conclusion: The labor costs were evaluated to comprise largest proportion (about 50%, 730,000 won). Dental implant cost using Bottom-up costing was 1,450,000 won for metal crown and 1,580,000 won for porcelain crown.

자동차 주행정보를 활용한 스마트 자동차 자가 점검 시스템 설계 및 구현

김민영,장종욱,Kim, Min-Young,Jang, Jong-Wook 한국정보통신학회 2013 한국정보통신학회논문지 Vol.17 No.9

In order to drive a vehicle safely, driver needs to check status of the car. Many moderns are having trouble to spare time to visit auto mechanic and have car mechanics to check their car other than their office hours. If the car status cannot be inspected regularly, it is likely to cause a big accident threatening the surroundings as well as driver's life. Inspection tool and system help driver to check their own vehicle status personally are required for preventing it. In this paper, it designed and realized system that records driving information based on changing data of vehicle (location and automotive internal data) and allows driver can check the vehicle status easily and further, driver can share the driving information with repair shop via the Internet to receive detailed inspection service for car status. 자동차를 안전운행하기 위해선 운전자는 항상 자동차 상태를 점검해야 한다. 많은 현대인이 자신의 주된 업무 이외에 시간을 따로 할애하여 전문 정비 업소에 방문해 자신의 자동차 상태를 점검받는 것은 정말 어려운 일이다. 지속적으로 자동차 상태를 점검 받지 못하면 운전자 자신의 생명은 물론 주변의 상황까지 어렵게 만드는 큰 사고를 발생할 가능성이 크다. 이를 방지하기 위해 운전자 스스로 자동차 상태를 손쉽게 확인 할 수 있게 도와주는 점검 도구 및 시스템이 필요하다. 본 논문에서는 운전 중 변화하는 데이터(위치 및 자동차 내부 데이터)를 근거로 주행정보를 기록 후 스마트폰을 활용해 운전자가 스스로 자동차 상태를 손쉽게 점검할 수 있고, 좀 더 나아가 인터넷을 이용해 주행정보를 전문 정비업소에게 공유하여 자동차 상태를 자세히 점검 받을 수 있는 시스템을 설계하고 구현하였다.