플립칩 패키지의 신뢰성 향상에 관한 연구

이선병(Sun Byung Lee),김종민(Jong Min Kim),이성혁(Seong Hyuk Lee),신영의(Young Eui Shin) 한국생산제조학회 2007 한국공작기계학회 춘계학술대회논문집 Vol.2007 No.-

A solder joint fatigue failure of flip chip (FC) package is mainly caused by the thermal stress due to the coefficient of thermal expansion (CTE) mismatch between the silicon die and the substrate. A nonlinear finite element analysis was conducted to investigate solder joint reliability under thermal cycling loading for FC assemblies without and with underfill. The effect of the solder joint height and thermomechanical properties such as CTE and Young's modulus on reliability of FC package. For parametric study, a finite element analysis are performed for seven different CTEs and five different Young's moduli of underfill. The concentrated Von Mises stress of the underfilled FC assembly was approximately 85% comparing that of FC assembly without underfill. Also, the concentrated stresses in the solder joint was decreased with increasing solder joint height. In addition, it is found that the solder joint reliability was improved with increasing Young's Modulus of underfill. Furthermore, the solder joint reliability was improved as the CTE was close to that of solder.

서울의 Penicillinase Producing Neisseria gonorrhoeae 발생빈도(1998)

김재홍,김준호,반재용,이정우,황성주,정준규,정성태,강진문,조흔정,홍창의,정혜신,이한승,김이선,이봉길,이종호,선영우,한기덕,윤성필,이성훈,안종성,박석범,문승현,조항래,김형섭,류지호,황재영,박준홍,손상욱 한양대학교 의과대학 2001 한양의대 학술지 Vol.21 No.1

In recent years, gonorrhea has been pandemic and remains one of the most common STDs in the world, especially in developing countries. For the detection of a more effective therapeutic regimen and assessing the prevalence of Penicillinase Producing Neisseria gonorrhoeae(PPNG), we have been trying to study the patients who have visited the Venereal Disease Clinic of Choong-Ku Public Health Center in Seoul since 1980 by menas of the chromogenic cephalosporin method. In 1998, 93 strians of N. genorrhoeae were isolated, among which 60(64.5%) were PPNG. The prevalence of PPNG in Seoul, which had been decreased to 39% in 1996 after a peak of 74.3% in 1993, is increased to 64.5% in 1998.

소음인(少陰人) 태음병(太陰病) 심하비증(心下?證)의 병증약리(病證藥理) 고찰

서영광,이지원,이준희,최원철,이의주,고병희,Seo, Young-Kwang,Lee, Ji-Won,Lee, Jun-Hee,Choi, Won-Cheol,Lee, Eui-Ju,Kho, Byung-Hee 사상체질의학회 2010 사상체질의학회지 Vol.22 No.3

1. Objective: Gastric Stuffiness (心下?證) in the Soeumin Taeeum symptomatology (少陰人 太陰病) in Sasang Constitutional Medicine shows an interesting evolutionary process. Originally found in the texts of Sanghanlun (傷寒論), the perspectives regarding the symptoms of Gastric Stuffiness were expanded by many medical scholars and Lee Jema. To comprehend the Jema's concept of Taeeum symptomatology and utilize his prescription clinically, it deserves to study on the Gastric Stuffiness in Donguisuseowon (東醫壽世保元). 2. Methods: Many texts including Sanghanlun (傷寒論) and Dongeuibogam (東醫寶鑑) were reviewed in order to track the evolutionary process concerning the symptoms of Gastric Stuffiness. Also, Lee Jema's works including the different versions of Donguisuseowon (東醫壽世保元) were reviewed to examine the development of Lee's concepts regarding the Gastric Stuffiness in the Soeumin Taeeum symptomatology. 3. Results and Conclusions: 1) Most of the previous concepts on Gastric Stuffiness were generally similar to those found in Sanghanlun, especially in that they addressed Yang deficiency of the middle triple energizeer as the central pathogenic process. 2) Lee Jema's views on the epigastric discomfort in the Soeumin Taeeum symptomatology evoloved over time and culminated in the finalized pathology and therapeutics appearing in his last work, the Shinchuk version of Donguisuseowon (東醫壽世保元). 3) 4 kinds of prescription which invented by Lee Jema to treat the Gastric Stuffiness in the Soeumin Taeeum symptomatology can be matched to the prescription of Sanghanlun respectively. However through evolutionary process of Jema's prescriptions, the indication of them expanded: not only to treat Gastric Stuffiness but to diverse symptoms of Soeumin.

영·유아 언어, 인지, 사회·정서 발달 평가도구 문항 개발을 위한 예비연구

이종숙,신은수,박은혜,김영태,유영의,최일선,유흥옥 이화여자대학교 교육과학연구소 2009 교육과학연구 Vol.40 No.3

본 연구는 만 2~5세 영·유아의 발달 상태를 객관적으로 평가함과 동시에 발달이 지연된 영·유아를 선별할 수 있는 발달평가도구 문항을 개발하기 위한 예비연구이다. 이를 위해 문헌고찰 및 발달관련 평가도구들을 비교 분석하여 발달지표를 선정하고, 만 2세~5세까지의 영·유아의 언어, 인지, 사회·정서발달영역을 교사관찰에 기초하여 평가할 수 있는 문항을 개발하였다. 연구대상은 대도시, 중소도시, 읍면 소재지 별로 표집 된 만 2세부터 5세까지 총 13개 유아교육기관에 다니는 435명의 영·유아들이며, 본 연구에서 최종 개발된 평가도구의 문항은 총 141문항이다. 평가도구 문항은 언어, 인지, 사회·정서발달영역별로 영·유아의 행동과 언어를 중심으로 교사가 관찰하고, 관찰하기 어려운 문항에 대해서는 단서와 kit를 제시하여 평가할 수 있도록 구성하였다. 개발된 평가도구 문항의 적절성을 알아보기 위하여 내용 타당도와 내적 신뢰도를 살펴본 결과 비교적 양호한 것으로 나타났다. This was a preliminary study to construct a developmental rating scale for understanding children's objective developmental levels and screening developmental disabilities. For this purpose, a developmental indicator was selected by a literature review and comparative analysis of related developmental assessment tests. An assessment scale based on teacher's observations to measure language, recognition, and social-emotional developmental areas was developed. The subjects were 435 young children aged 2 to 5 who lived in both urban and rural areas. A trial test consisted of 141 assessment items in the language, recognition, and social-emotional developmental domains. The developmental scale was evaluated by teachers who observed children's behavior and language, and used clues and kits. Tests on validity and reliability for confirming the appropriateness of the developed assessment scale showed that content was relatively valid and internally consistent.

노인 당뇨환자의 복약 및 다제병용실태 분석

이의경,최영옥 韓國保健敎育.健康增進學會 2000 보건교육건강증진학회지 Vol.17 No.1

This study is intended to investigate medication compliance and polypharmacy of the diabetic patients by age group in order to determine the major factors that influence their compliance. 198 ambulatory diabetic patients were interviewed, and the sample was divided into three groups based on the age: Young age group under 75, Borderline age group between 55 - 65, Old age group over 65. According to the study results, medication compliance for the old age group was 72.6% whereas 85.1% for the young age group. Medication compliance significantly decreased as the age of the patients increased. Also the degree of polypharmacy, the rate which patients take more than 6 prescription drugs, was 45.9% for the old gruop, whereas 31.2% for the young group. As the most important factor of polypharmacy, the number of doctors was statistically significant. With regard to prescription factors related to medication compliance, the amount of prescribed medication is statistically significant between the compliance group and non-compliance group. In addition, the amount of information provided to patients by pharmacists was determined to be a very significant factor. Also the level of ease in understanding the medication instructions varied significantly between the compliance group and the non-compliance group. In light of the empirical data and results for the diabetic patients, it is necessary to develop and implement various programs to improve medication compliance and to decrease the level of polypharmacy among the elderly, or "old", diabetic patients.

생활체육참여자의 여가활동 유형이 생활만족에 미치는 영향

김의영,김의영,김영숙,윤대중,이병기 龍仁大學校 體育科學硏究所 2002 體育科學硏究論叢 Vol.12 No.1

This research is designed to make a comparative analysis of the types of leisure activities and the degree of and life satisfaction by demographic background variable and to present basic materials necessary for the development of programs for local policies on leisure in accordance with the local autonomous system with a view to determining the relationship between life satisfaction by type of leisure activity. The following are the findings. First, the survey failed to test a statistically significant difference between family member's mutual satisfaction, or the subordinate variable of age, job and health and general life satisfaction, or the subordinate variable of income. But there was a statistically significant difference in life satisfaction by gender, age, education, job, income and health at a level of 1 percent. Second, the survey on the influences of the types of leisure activities on leisure satisfaction and life satisfaction revealed that there was a statistically significant influences in all the subordinate variables of and life satisfaction.

여가활동 유형이 여가만족에 미치는 영향

김의영,김의영,김영숙,윤대중,이병기 龍仁大學校 武道硏究所 2002 武道硏究所誌 Vol.13 No.1

This research is designed to make a comparative analysis of the types of leisure activities and the degree of leisure satisfaction by demographic background variable and to present basic materials necessary for the development of programs for local policies on leisure in accordance with the local autonomous system with a view to determining the relationship between leisure and life satisfaction by type of leisure activity. The following are the findings. First, the survey on testing the difference of leisure satisfaction by gender failed to test the difference in psychological and physiological satisfaction, but there were a statistically significant difference in educational, social and relaxation satisfaction at a level of 1 percent. And the survey failed to test the difference in psychological satisfaction by age, but there was a statistically significant difference in leisure satisfaction by society, education, job, monthly income, and health. Second, the survey on the influences of the types of leisure activities on leisure satisfaction revealed that there was a statistically significant influences in all the subordinate variables of leisure satisfaction.

일 도농복합지역 저소득층 노인의 건강문제 분석 : 보건소 방문간호사업 대상자 중심으로

고일선,,이태화,이경자,이정렬,임미혜,천의영,주윤미,이계철 노인간호학회 2005 노인간호학회지 Vol.7 No.2

Purpose: The purpose of this study was to analyze the health problems of low-income aged with chronic illness living in urban-rural composite area. Method: The sample consisted of 440 aged who were receiving home care services from a public health center. MDS-HC was applied to analyze the health problems of the aged. Data were collected through a face- to-face interview by six trained interviewers from June 28 to July 15, 2004. Result: Subjects had average number of 8 health problems in both urban and rural area. Lack of preventive health care measure, pain, and visual function were the most frequent health problem. The rural aged had more pain, bowel management problems, compared to the urban aged having more urinary incontinence and indwelling catheter. There were many health problems related to falls and pressure ulcers with middle-old aged in urban, and old-old aged in rural area. Conclusion: The results of this study showed strategies for care intervention of low-income elderly to put in practice. Therefore, tailored-service for each subject should be provided.

열공형과 비열공형 피질하 혈관성 치매에서 위험인자의 차이에 관한 비교 연구

배희준,정지향,유경호,나덕렬,김상윤,최경규,양동원,손의주,이상도,김재우,박경원,김응규,이재홍,박미영,한일우,함동석,최문성,하충건,최성혜,이애영,이병철,한설희 대한치매학회 2003 Dementia and Neurocognitive Disorders Vol.2 No.2

Backgrounds and Objectives: Vascular dementia is a group of dementing disoders arising from various stroke syndrome. Among these. subcortical ischemic vascular dementia (SIVD) is regarded as a relatively distinct clinical entity. However, MRI patterns of SIVD are not homogenous. In some patients, lacunes are dominant, and in others, subcortical white matter changes are. This study was designed to compare risk factor profiles between SIVD with and without multiple lacunes. Methods: We divided 47 subjects (22 males, mean age. 68 years) recruited from VADAPET (Multicenter Trial For Evaluation Of The Changes In the PET Images Of Subcortical Vascular Dementia Patient) study into two groups one with more than 5 lacunes in deep gray matter (lacune group) and the other with 5 or less(non-lacune group) Clinical characteristics and laboratory findings of two groups were compared. Results: Nineteen of 47 patients (40%) belonged to the lacune group. The lacune and non-lacune groups d d not differ in the following variables: age, hypertension, diabetes mellitus, hyperlipidemia heart disease, history of stroke or TIA, history of trauma or major surgery, family history of hypertension stroke, or dementia, age at diagnosis of dementia, body mass index, white blood cell count, ESR, CRP, fibrinogen, hemoglobin A1C, total cholesterol. LDL cholesterol creatinine, proteinuria, glucosuria, and microhematuria. However, male sex, smoking alcohol. hemoglobin, and HDL cholesterol were possibly associated more with lacune group SIVD than with non-lacune group (p<0 1) Multivariate analyses revealed that smoking, hemoglobin, and HDL cholesterol were independent predictors of SIVD with multiple lacunes Conclusion: Our study suggests that SIVD with multiple lacunes may be significantly different in smoking habits hemoglobin, and HDL cholesterol from SIVD without multiple lacunes.

승모판막 재치환의 임상적 고찰

이영,황의두 충남대학교 의과대학 지역사회의학연구소 1998 충남의대잡지 Vol.25 No.1

Ten cases of mitral valve replacement were done at Department of Chest Surgery in Chungnam National University Hospital during the period from Nov. 1991 till Dec. 1997 were covered in this study. All case were replaced using lonescu-Shiely glutealdehyde treated bovine pericardial valve at the first operation. The average time interval between reoperation and previous operaration was 10 years (ranged from 5 years to 13.2 years). The most pronounced pathology of the failed xenograft valves was calcification and fixation of cusp. The failed tissue valves were replaced with CarboMedics bileaflets valve(9 cases) and Sorin(1 case) mechanical valve. One patient was died of failure of weaning from cardiopulmonary bypass.