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근로자의 근무조건이 구강건강관리에 미치는 영향에 관한 연구
최윤화 대한치과위생학회 2006 대한치과위생학회지 Vol.8 No.1
This study investigates the effects of the working condition of most of workers in Korea on theirmouth. The subjects of the study include 87 office workers who work in 2 offices located in CheonAnand ASan City, Chungnam Province from February to May 2005 and they are asked to fill up thequestionnaire. Among the respondents, 7 are excluded because their questionnaires are not faithfullywritten; therefore, the final subjects of this study include 80 persons. The collected data are inputted andanalyzed using SAS program and the general characteristics of the respondents are described as realnumber and percentage. Categorical data are examined using Chi-Square test. Logistic analysis is used inorder to examine the variables that affect respondents’visit of dental clinics, the presence of scaling andbrushing the teeth before going to bed.The results of the study are as in the following.1. Among the respondents, male respon! dents are 67.5% and female counterparts are 32.5% and 93.7%of them are less than 40 who are relatively young.2. As a result of logistic analysis, the variables that affect the visit of dental clinics are gender, experienceof changing one’s position, presence of stress significantly.3. The results show that the female respondents (p=0.0492) and those who have the experience ofchanging their jobs (p=0.0246) are more likely to visit the dental clinics.4. The variables that affect the presence of scaling are significantly influenced by the variables such asthe experience of changing jobs and working hours a day. The more they have the experience ofchanging their jobs (p=0.0024) and the less they have working hours (less than 8 hours a day)(p=0.0187), the more they do scaling. One of the variables that affect the presence of brushing theteeth before going to bed is the marital status and married people do brush teeth before going to bedmore than unmarried people (p=0.0408).
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최윤화 한국일본어문학회 2013 日本語文學 Vol.59 No.-
安倍能成は 大正教養主義をリードしていた知性人、リベラリストとしてよく知られている。安倍は京城帝国大学へ赴任する前に在外研究員として一九二四年九月から一年四ヵ月間ヨーロッパで研修を目的として滞在する。彼はヨーロッパ学問の専門家、受容者として、日本にいる間に書籍を通して受け入れた知識をより客観化、深層化するためには、自らの体験による確認と検証の作業がもっとも重要であると考えていたようである。一年四ヵ月という時間的制約があったために安倍はできるだけ多くのものを「旅」を通して体得しようとした。安倍にとって「旅」は単なる旅を意味するのではなく、日本で蓄積していた西欧に関する知識の確認及び検証を通して、客観化する作業であった。それらの作業を通して安倍はヨーロッパ文明の本質を把握しようとしたのである。その結果、日本とヨーロッパの文明の本質的な面を究明することができ、日本文化に対しても再認識するようになる。安倍のこのような視座の形成は、後、日本社会に大きく影響を与えるようになる。本研究では安倍がヨーロッパ滞在を通して体得した視座と学問、それが日本社会に与えた影響は何であったかに関して具体的に取り調べることをその目的としている。
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최윤화,John A. Manthey,박태현,차연경,김양,김유리 한국식품과학회 2021 Food Science and Biotechnology Vol.30 No.5
The human sweet taste receptor is a TAS1R2/TAS1R3 heterodimer. To investigate the correlationbetween the in vitro affinity of sweeteners with stablyexpressed human sweet taste receptor in HEK-293 cellsand human sensory evaluation, the receptor-ligand activityof bulk (sucrose, D-fructose, and allulose) and high-intensitysweeteners (saccharin, rebaudioside A, rebaudiosideM, and neohesperidin dihydrochalcone) was compared byanalyzing the Ca2? release. The relative potency of thesweeteners was identified over a wide concentration rangefor EC50s. Relative to sucrose, bulk sweeteners showedsimilar concentration ranges and potency, whereas highintensitysweeteners exhibited lower concentration rangesand higher potency. The log of the calculated EC50 of eachsweetener relative to sucrose by the in vitro affinity assaywas positively correlated (r = 0.9943) with the molar relativesweetness reported in the previous literatures. Theseresults suggested a good correlation between the in vitroactivity assay of sweeteners and human sensory evaluation.
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부부관계증진 프로그램이 부부 의사소통과 결혼만족도에 미치는 효과
최윤화 한국아동교육학회 2000 아동교육 Vol.9 No.2
The purpose of this study is to find out the effects of the marriage enrichment program on marital communication and satisfaction. The program consists of three main parts: Self-understanding, Spouse-understanding, and Communication. The subjects were ten couples who volunteered to participate in the marriage enrichment program and they were mainly selected from the population who were functioning relatively well enough to enhance their relationship in Miryang, Kyungsang Namdo. The subjects were divided into 2 groups : an experimental group of 5 couples and a controlled group of 5 couples on the waiting-list. The experimental group consisted of couples who were given a relationship enhancement program of 9 treatment sessions for 9 weeks. Each session was held for 2 hours on weekends. On the other hand, the subjects in the controlled group did not receive any treatment. The instruments used to identify the treatment effects were the Marital Satisfection Scale adapted. The materials were collected twice before investigating the two groups and after doing that. The materials which resulted from this experiment were delt in ANOVA statistical method using SAS program. The conclusions were obtained after discussing and comparing the previous studies. They are as follows. 1. The Marriage Enrichment Program(MEP) shows a significant effect on marital communication. 2. MEP is effective in developing marital communication in the lower range of marital communication. 3. MEP is effective in developing mutual understanding in the lower range of marital communication. 4. MEP is effective in marital satisfaction.
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패키지 내부 구조 피로 개선을 위한 양면방열기판 패키지
최윤화,장경운,최정호 대한용접·접합학회 2021 대한용접학회 특별강연 및 학술발표대회 개요집 Vol.2021 No.5
전기차 및 신재생에너지 등 전력용 반도체의 활용도가 많아 짐에 따라 시장은 고효율 및 고성능의 전력용 반도체 필요성이 그 어느 때보다 필요하게 되었다. 특히 고효율 및 고성능의 전력용 반도체를 위해서는 반도체 칩을 탑재하는 반도체 패키지 구조의 신 개념 변화가 필요하고 또한 가격경쟁력이 있는 패키지 소재의 사용과 이에 따른 단순 패키지 조립 공정개발이 중요하게 되었다. 종래의 많은 패키지 구조와 조립 공정기술이 있지만 단면 방식의 열전달 구조로 인한 한계점과 이를 극복하기 위한 단면방식의 고방열을 구조를 사용시 패키지 제작비용이 상승하는 문제가 발생하였다. 이에 상기 문제의 대안으로 양면방열기판 방식의 전력용 반도체 (이하 DSC 패키지) 패키지의 필요성이 대두되어 많은 회사가 DSC 패키지 개발에 총력을 기울이고 있다. 현재 DSC 패키지의 주요 BOM (base of material) 은 기판 (금속 혹은 절연), 반도체칩 접합소재 (솔더 혹은 신터), 반도체 칩 연결 소재 (금속 혹은 복합소재 Spacer), Flip chip 본딩 방식 혹은 와이어 스페이서 연결 방식 등 다양한 패키지 구조방식의 BOM으로 개발 및 양산을 하고 있는 상황이다. 또한 이러한 DSC 패키지는 구조에 따라 대량 양산 작업성 등에 개선이 필요 하고 구조에서 오는 stress를 해소하기 위해 소재의 물성을 변화시키는 다양한 노력을 하고 있다. 이제 본 기술 발표 보고서를 통하여 현재 개발 및 양산중인 회사들의 다양한 DSC 패키지 비교 및 현재 DSc 패키지 구조의 문제점을 해결하기 위한 JMJ Korea의 DSC 패키지 (clip 본딩형 DSC 패키지)의 구조와 장점을 살펴보기로 한다.
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