전산유체역학을 이용한 싸이클론형 전기집진기 고도 설계 연구

이은주,장동순,나혜령,김혜숙 忠南大學校 環境問題硏究所 1995 環境硏究 Vol.13 No.-

A computer program is developed in order to figure out the physical insight of the combined dust removal equipment, that is, cyclonic electrostatic precipitator. The computer program employs Patankar's control-volume based finite-difference method, in which SIMPLEC algorithm is used for the resolution of pressure-linked momentum equation. Further two equation k-ε model is incorperated for Reynolds stresses and many empirical formulae are employed for dust charging and electric resistivity. A series of extensive parametric investigations are performed in terms of tangential velocity(swirl intensity), applied voltage across two electrodes, and particulate diameters, etc. It is found that the electrostatic force gives much more strong effect, expecially for small particulate, on the dust removal than the centrifugal force. Other calculated results are physically acceptable and consistent.

Effects of the senior welfare center exercise program on body shape, physical fitness level, and cardiovascular health-related factors in old man from Korean rural areas

Hey-Young Joo,Joon-Young Park,Hyun-Seung Rhyu 한국운동재활학회 2019 JER Vol.15 No.2

데이터마이닝을 이용한 학업성취 결정요인 탐색

이혜주 ( Hey Joo Lee ),전의현 ( Jung Eui Hyun ) 한국아동교육학회 2013 아동교육 Vol.22 No.2

본 연구에서는 중학생의 학업성취에 영향을 미치는 요인들을 탐색하고 성별에 따라 결정요인과 그 조합 관계를 조사하기 위해 한국청소년패널조사(KYPS; Korea Youth Panel Survey: KYPS) 중 2패널의 1차년도에 해당되는 중학교 2학년 데이터(총 3449명, 남: 1725명, 여: 1724명)를 대상으로 데이터마이닝의 의사결정나무분석을 통해 학업성취를 결정하는 요인들을 탐색하였다. 그 결과, 전체 중학생의 학업성취에는 사교육시간, 자기신뢰, 본인희망교육, 개인공부시간, 주변문제아인식, 부모애착, 생활만족도, 주변비난걱정, 부학력, 컴퓨터시간, 부모감독이 영향을 미치는 결정요인으로 나타났으며, 남학생의 학업성취에는 사교육시간, 개인공부시간, 학교적응정도, 자기신뢰, 생활만족도, 공격성, 부모애착이, 여학생의 학업성취에는 사교육시간, 주변문제아인식, 생활만족도, 학교적응정도, 부학력, 여가만족도, 자기통제력이 영향을 미치는 결정요인으로 나타났으며, 이러한 요인들은 조합되는 다양한 조건에 따라 학업성취를 증가 또는 감소시키는 것으로 나타났다. 본 연구의 결과로 학업성취를 증가시키는 데 있어서 각 개인이 갖는 다양한 조건들을 효과적으로 활용할 수 있음을 제언하였다. This study explored the determining factors for the middle school students` academic achievement using the sample form KYPS, Korea Youth Panel Survey, data. Participants were 3449 second grade students, 1725 male, 1724 female, Data mining decision tree model was performed with total 39 independent variables related to person, home, and school and academic achievement as a target variable. The results revealed that :(1) Private education time, self-reliance, one`s own hope education, study time, the other people`s acknowledgement of misdeed, parental attachment, life satisfaction, worrying the other people`s blame, father`s level of education, computer use hours, parental monitoring were significant determining factors for total academic achievement.(2) Private education time, study time, school adaptation, self-reliance, life satisfaction, aggression, parental attachment were significant were significant determining factors for male students` academic achievement. (3) Private education time, the other people`s acknowledgement of the misdeed, life satisfaction, school adaptation, father`s level of education, leisure satisfaction, self-control were significant determining factors for female students` academic achievement. These results suggest that students` diverse conditions and combinations of determining factors should be considered individually in methods and programs for enhancing students` academic achievement.

Changes in Sensitization Rate to Weed Allergens in Children with Increased Weeds Pollen Counts in Seoul Metropolitan Area

Kim, Joo-Hwa,Oh, Jae-Won,Lee, Ha-Baik,Kim, Seong-Won,Kang, Im-Joo,Kook, Myung-Hee,Kim, Bong-Seong,Park, Kang-Seo,Baek, Hey-Sung,Kim, Kyu-Rang,Choi, Young-Jean The Korean Academy of Medical Sciences 2012 JOURNAL OF KOREAN MEDICAL SCIENCE Vol.27 No.4

<P>The prevalence of allergic diseases in children has increased for several decades. We evaluated the correlation between pollen count of weeds and their sensitization rate in Seoul, 1997-2009. Airborne particles carrying allergens were collected daily from 3 stations around Seoul. Skin prick tests to pollen were performed on children with allergic diseases. Ragweed pollen gradually increased between 1999 and 2005, decreased after 2005 and plateaued until 2009 (peak counts, 67 in 2003, 145 in 2005 and 83 grains/m<SUP>3</SUP>/day in 2007). Japanese hop pollen increased between 2002 and 2009 (peak counts, 212 in 2006 and 492 grains/m<SUP>3</SUP>/day in 2009). Sensitization rates to weed pollen, especially ragweed and Japanese hop in children with allergic diseases, increased annually (ragweed, 2.2% in 2000 and 2.8% in 2002; Japanese hop, 1.4% in 2000 and 1.9% in 2002). The age for sensitization to pollen gradually became younger since 2000 (4 to 6 yr of age, 3.5% in 1997 and 6.2% in 2009; 7 to 9 yr of age, 4.2% in 1997 and 6.4% in 2009). In conclusion, sensitization rates for weed pollens increase in Korean children given increasing pollen counts of ragweed and Japanese hop.</P>

예비 중등과학 교사들의 물체의 운동 개념의 과학사적 관점 분석

주지영,김소연,백성혜 한국과학교육학회 2004 한국과학교육학회지 Vol.24 No.6

이 연구에서는 물체의 운동에 대한 과학사적 변천을 아리스토텔레스 시대부터 뉴턴의 관점까지 다양하게 구분하고, 이를 토대로 설문지를 개발하였다. 설문지는 운동의 원인, 운동의 형태, 운동에서 보존되는 양의 개념을 포함하며, 이를 예비 중등 과학 교사들에게 투입하여 이들의 응답을 과학사적 관점으로 분석하였다. 연구 대상은 물리 교육을 전공하는 대학교 2학년생 20명과 다른 과학관련 교육을 전공하는 대학교 2학년생 34명이었다. 연구 결과, 물리교육을 전공하는 중등 예비교사들은 다른 과학관련 교육을 전공하는 예비교사들보다 운동의 원인이나 운동의 형태에 관련된 개념에서는 관성과 뉴턴의 힘 개념을 가지고 있는 비율이 높았다. 그러나 이들은 전공에 상관없이 운동에서 보존되는 양에 대한 개념을 알아보는 설문지에서 운동량을 속력에 비례하는 것으로 이해한 데카르트의 관점이나 운동 에너지가 보존된다는 호이겐스의 관점을 가지는 비율이 매우 높았으며, 상대적으로 운동량을 속도에 비례하는 것으로 이해하는 뉴턴의 관점을 가지고 있지 못하였다. In this study, various scientific viewpoints of 'motion of objects' were analyzed from the Aristoteles age to the Newton age. From the analysis, a questionnaire was developed which was including causes of motion, forms of motion, and preservation quantity of movement. The conceptions of pre-service science teachers were researched by the questionnaire developed in this study based on the science historical viewpoints. The subjects were twenty sophomore students of physic education major and thirty four of other science education major who majored common science education also in a college. Most of the pre-service teachers of physical education major had inertia and Newton's force conception related to the question situations of 'causes of motion' and 'forms of motion'. But a lot of the pre-service teachers of physic education major and other science education major had viewpoints of Descartes or Huygens related to the question situation of 'preservation quantity of movement'. Only few pre-service teachers regardless of major had Newton's viewpoint which represented in current Korean science curriculum for secondary school.

Bioinformatics and Systems Biology : Intracellular signaling pathway and protein analysis of the cardiac hypertrophy induced by endothelin-1 and isoproterenol

( Hey Min Hong ),( Noh Young Lee ),( Eun Joo Song ),( Young Sook Yoo ) 한국생화학분자생물학회 (구 한국생화학회) 2008 생화학분자생물학회 춘계학술발표논문집 Vol.2008 No.-

Ampicillin/Sulbactam-induced Hemo-lytic Anemia Manifested as Hyperbiliru-binemia in a Preterm Infant

( Joo-hyung Roh ),( Hey-suk Yun ),( Hyun-kyung Park ),( Hyun Ju Lee ),( Chang-ryul Kim ),( Tae-hee Han ) 대한주산의학회 2016 大韓周産醫學會雜誌 Vol.27 No.3

A female was born at 36⁺⁵ weeks of gestation with a birth weight of 2,120 g. Apgar score was 7 at 1 minute and 9 at 5 minutes. Shortly after birth, tachypnea, chest retraction, and a severe build-up of oral secretions were noted. Her blood type was A⁺ and initial hemoglobin was 17.5 g/dl. Her mother was A⁺ blood type. Ampicillin/Sulbactam and gentamicin were started empirically. At 8th day of admission, laboratory results showed hemolytic anemia. Exchange transfusion was performed along with intravenous immunoglobulin and hydrocortisone. After 2 days, the patient’s clinical and laboratory conditions improved. Column hemagglutination assay revealed that the patient’s hemolysis was due to ampicillin/sulbactam.

A Special Issue of Caring the Aged: Episode of Joint & Ankle Problems

Joo Hyun Ham,Seung Hey Han 한국노인복지학회 2003 International Journal of Welfare for the Aged Vol.8 No.-

There is a growing recognition of the need to develop a comprehensive system of care for impaired adults who can be maintained in their own homes with the help of community-based services instead of their family members. Special health care can be one of these systems, serving those adults who are unable to function at home without supportive services, yet who do not need 24 hour care. Ankle injuries are among the most common injuries in sports and recreational activities for general population, but also common in ordinary daily activities among the older adults. It has been estimated that 45% of basketball injuries, 31% of soccer injuries, and 16% of football injuries involve the ankle joint for the young, but 20% of the older adults. In order to minimize the occurrence of such injuries, significant efforts and resources have been invested in the development of prophylactic support aids. such as athletic tape and ankle orthoses. The mechanisms by which injuries can be reduced by an external support include enhancement of mechanical stability and proprioceptive awareness.

Effects of regular physical activity on immune function of survivors with colorectal cancer : A pilot study

Hey-Won Ju,Yong-Seok Jee,Jong-Kyun Lee,Sin-Young Nam,Ye-Jin Jang,Tae-Joo Kim 한국운동재활학회 2019 한국운동재활학회 학술대회 Vol.2019 No.05

Aim: Several mechanisms have been proposed as an explanation for the protective action of the physical activity against cancer. Experimental evidences have been suggested, but until now, no particular mechanism has been shown to prevent cancer and increase immune function. The aim of this study was to determine the effects of physical activity on changes in immune function of survivors from colorectal cancer. Materials and Methods: The participants were 6 women, aged between 47 and 59 years, who were recruited from Seoul Song-Do Hospital. All participants were participated in physical activity program 80 minutes a day, 3 times a week for 6.67 ± 3.98 months. Survivors performed 10 minutes of warm-up, 60 minutes of work-out which consisted with aerobic exercise (40 min) and resistance exercise (20 min), and 10 minutes of cool-down. The intensity of physical activity was set 40 to 70% of maximal heart rate. Although the intensity, duration and frequency of physical activity was the same in absolute value, the activity period was different. The reason for the difference in the period of physical activity was that the survivors participated in different periods. This study investigated the changes of CBC, innate immunity related to NK-cell and percentage, adaptive immunity related to T-cell and percentage, and adaptive immunity related to immune suppression. Based on the results of Kolmogorov-Smirnov test, the non-parametric Mann Whitney U test was used to examine the differences of variables within times. The significance was established at P ≤ .05. Results: The 1st section analyzed the CBC which composed of WBC, number and percent of lymphocyte, and number and percent of neutrophil. Following analysis, the number of lymphocyte was significantly increased (Z=-1.992; P=0.046) after physical activity intervention. The 2nd section analyzed the innate immunity related to NK-cell and percentage which composed of NLR, CD3-CD56 NK cell (total NK cell), NKG2D+NK cell, KIR2DL3+NK cell and NKT. There were no significantly different. The 3rd section analyzed the adaptive immunity related to T-cell and percentage which composed of CD3+T cell (total T cell), CD3+CD4+T cell (Helper T cell), CD3+CD8+T cell (Cytotoxic T cell), CD4/CD8 ratio, Th1, Th2, and Th1/Th2 ratio. Following physical activity intervention, the number of Th2 (Z=-2.201; P=0.028) was significantly decreased. The last section analyzed the adaptive immunity related to NK-cell and percentage which composed of CD4+CD25+T cell, CD4+CTLA+4+T cell, CD4+PD1+T cell, CD8+PD1+T cell, CD8+TIGIT+T cell, MDSCs and cytotoxicity. Following physical activity intervention, the number and percentage of CD8+PD1+T cell were significantly decreased (Z=-2.201; P=0.028; Z=-1.992; P=0.046), whereas, the CD8+TIGIT+T cell (Z=-1.992; P=0.046) and cytotoxicity (Z=-1.992; P=0.046) were significantly increased. Conclusion: This study found out that there were some significant changes in adaptive immune function. In other words, this study confirmed that the regular physical activity affected to the adaptive immune function of colorectal cancer survivors.

독거여부와 거주지역에 따른 중년기와 노년기 남성과 여성의 악력 차이

주수산나(Joo Susanna),전혜정(Jun Hey Jung),박하영(Park Hayoung) 한국노년학회 2018 한국노년학 Vol.38 No.3

본 연구의 목적은 독거여부와 거주지역에 따라 중년기와 노년기 남성과 여성의 악력에 차이가 있는지를 탐색하는 데에 있다. 이를 위해 본 연구에서는 한국고령화연구패널 5차년도 자료를 활용하였다. 독립변수는 독거여부와 거주지역(도시, 비도시)이며, 종속변수는 악력이다. 통제변수로는 연령, 교육수준, 로그변환된 가구소득, 배우자 여부, BMI(Body Max Index), 주관적 건강, 우울감, 인지기능 수준, 흡연여부, 규칙적 운동여부, 친한 친구와 만나는 횟수, 참여하는 사회적 모임의 수가 모형에 포함되었다. 분석은 중년기 남성과 여성, 노년기 남성과 여성을 대상으로 각각 실시되었으며, 분산분석과 카이검증, 상관분석, 회귀분석을 통해 자료가 분석되었다. 회귀분석 이후 유의한 분석결과에 대한 구체적인 논의를 위해 독거여부와 거주지역의 상호작용항이 유의한 집단을 대상으로 분산분석과 카이검증이 추가적으로 실시되었다. 모든 분석에는 한국고령화연구패널의 5차년도 횡단 가중치가 적용되었다. 본 연구결과 노년기 여성들의 악력 평균이 악력의 이상치를 판별하는 절단점 점수와 유사한 것으로 나타나 노년기 여성들이 다른 생애주기나 노년기 남성들과 비교했을 때 악력과 관련하여 임상적 취약집단에 속하는 것으로 나타났다. 또한 중년 남성과 노년기 남성, 노년기 여성에게서는 독거여부와 거주지역에 따른 악력 차이가 통계적으로 유의미하지 않은 것으로 나타났다. 그러나 중년 여성들에게 있어서는 독거여부와 거주지역에 따른 악력 차이가 통계적으로 유의미한 것으로 나타났다. 구체적으로, 비도시 지역에 홀로 거주하는 독거 중년 여성이 다른 중년 여성들에 비해 평균적으로 가장 낮은 악력을 가진 것으로 나타났다. 추가적인 분석에 따르면 비도시 독거 중년 여성은 낮은 학력과 낮은 가구 소득 등 다른 중년 여성들에 비해 건강에 더 취약한 요인들을 많이 가지고 있는 것으로 나타났다. 이러한 본 연구결과는 노년기 여성과 비도시에 홀로 거주하는 중년기 독거 여성들에게 악력과 관련된 개입이 필요함을 시사한다. 본 연구는 국가 전체를 대표하는 대표성 있는 패널자료를 사용하여 가중치를 적용한 분석을 통해 일반화 가능성을 높였다는 점에서 중노년기 악력과 관련한 정책적 대상자를 선정하는 것과 관련한 신뢰성 있는 정보를 제공할 수 있다는 의의가 있다. Demographic and socio-structural information is useful to identify potential welfare recipients who are in need of disease-prevention and intervention services. Thus, the present study aims to explore the differences in grip strength among middle and old-aged adults by living conditions and by living area. The 5th wave data of Korean Longitudinal Study of Aging was utilized. The dependent variable was grip strength, and the independent variables were living alone (living alone or not) and living area (city or non-city). Covariates were age, education, log-transformed household income, spouse existence, body mass index, self-rated health conditions, depressive symptoms, cognitive function, smoking, regular exercise, frequency of meeting with friends, and the number of social participation. Regression analysis was performed for middle-aged men, middle-aged women, old-aged men, and old-aged women, respectively. ANOVA and Chi-test were additionally used to specifically discuss significant results. Cross-sectional weight was applied to all analyses. According to the results, living alone and living area did not have significant effects on grip strength among middle-aged men, old-aged men, and old-aged women. In middle-aged women, however, living alone and living area were significantly associated with grip strength. To be specific, middle-aged women who lived alone in rural areas had the lowest grip strength compared to other middle-aged women. Additional analysis showed that middle-aged women who lived alone in rural areas had risk factors, such as low education level, low income, or high depressive symptoms. It implies that middle-aged women living alone in rural areas may have physical health risks, so they might be in need of disease prevention. This study is meaningful in that it can provide reliable information on the latent welfare recipients by using representative panel data and applying weight values.