2유체 분무노즐의 분열특성(I)-액주분열 및 내부유동-

김혁주,이충원,Kim, Hyeok-Ju,Lee, Chung-Won 대한기계학회 1997 大韓機械學會論文集B Vol.21 No.8

The breakup length of a liquid jet with flowrate, formed by releasing through a nozzle of circular cross-section into the atmosphere, was experimented and studied for 3 liquid nozzles of varying diameters. The experimental result was analyzed using the existing theoretical equation for predicting the breakup length. It was found that the breakup length of liquid jet depends on the velocity, and the breakup length increases with increasing of the liquid nozzle diameter. Also, the variation range of the breakup length for the same flowrate of liquid increased rapidly as velocity was increased for laminar flow, but in the turbulent flow region, it leveled off in the range of approximately 0.55-0.7 of the mean breakup length. Furthermore, when the longest smooth liquid jet was applied to the co-axial flow air blast atomizer, the effect of air flow on the flow pattern and breakup length was studied for 6 glass nozzles of different lengths and diameters. It was found that depending on the diameter of the mixing tube and liquid jet, it was possible to observe a wide range of flow patterns, such as liquid jet through flow, partial annular flow and annular flow. The liquid jet breakup length was more sensitive to the change in the length rather than the diameter of the mixing tube. As the length of the mixing tube shortens, the breakup length also shortens rapidly.

경력단절여성의 진로결정 자기효능감이 사회적지지와 진로준비행동에 미치는 영향

김혁주(Kim, Hyeok-Ju) K교육연구학회 2021 사회과학리뷰 Vol.6 No.3

본 연구의 목적은 경력단절여성이 지각한 진로결정 자기효능감의 하위요인이 진로준비행동에 미치는 영향과 사회적지지의 매개효과를 실증적으로 규명하는데 목적이 있다. 이를 위해 경력단절여성이 구직활동을 위해 이용하는 여성새로일하기센터의 이용자를 대상으로 하여 설문조사를 실시하였다. 연구 결과 첫째, 경력단절여성의 진로결정 자기효능감의 하위요인들은 진로준비행동과 유의한 정적 상관관계를 보였으며, 진로결정 자기효능감의 하위구성요인들은 진로준비행동에 정적인 유의한 영향을 미치는 것으로 나타났다. 이는 경력단절여성의 취창업 지원시 진로결정 자기효능감의 하위요인인 자기평가, 진로계획, 정보수집, 목표설정, 문제해결과 관련한 하위목표를 수립하고 감안하는 가운데 운영할 필요가 있음을 시사한다. 둘째, 경력단절 여성의 진로결정 자기효능감의 하위 요인들은 사회적지지와 유의한 정적 상관관계를 보였으며, 진로결정 자기효능감의 하위요인들은 사회적지지에 정적인 유의한 영향을 미치는 것으로 나타났다. 셋째, 진로결정 자기효능감이 진로준비행동에 미치는 영향에서 사회적지지의 매개효과는 없는 것으로 나타났다. The purpose of this study is to empirically investigate the influence of the sub-factors of career decision self-efficacy perceived by career interrupted women on career preparation behavior and the mediating effect of social support. For this purpose, a survey was conducted targeting users of the Women s New Employment Center, which women with career interruption use for job search. The results and implications of this study are the same. First, the sub-factors of career decision self-efficacy of women with career interruption showed a significant positive correlation with career preparation behavior, and the sub-components of career decision self-efficacy had a significant positive effect on career preparation behavior. This suggests that it is necessary to establish and operate sub-goals related to self-evaluation, career planning, information collection, goal setting, and problem solving, which are sub-factors of career decision self-efficacy when applying for employment and start-up of women with career interruption. Second, the sub-factors of career decision self-efficacy in women with career interruption showed a significant positive correlation with social support, and the sub-factors of career decision self-efficacy had a significant positive effect on social support. Third, it was found that there was no mediating effect of social support in the effect of career decision self-efficacy on career preparation behavior.

대학의 진로교육과 취업의지에 대한 영향 관계와 교육기회충족의 조절효과에 관한 연구

김혁주 ( Kim Hyeok-ju ),이상호 ( Lee Sang-ho ),고현선 ( Go Hyun-sun ) 아시아문화학술원 2017 인문사회 21 Vol.8 No.5

본 연구는 진로교육을 위해 필요한 직업이해, 진로준비행동, 경력지향성, 역량강화교육과 취업의지의 영향관계를 연구하였고, 교육기회 충족여부를 조절효과 분석을 통하여 취업의지의 방향과 크기의 변화를 검증하였다. 연구 결과 직업이해, 진로준비행동, 역량강화교육은 취업의지에 정(+)의 영향관계가 나타났고, 경력지향성은 취업의지에 부(-)의 영향관계가 나타났다. 경력지향성과 취업의지에 대하여 교육기회충족은 조절효과 있는 것으로 나타났다. 이러한 진로교육을 통하여 미래의 직업세계에 대한 두려움을 해결하고, 대학생의 고용시장 진입에 기여할 수 있는 진로교육의 여건이 제공되기를 기대한다. The purpose of this study is to investigate the effects of job understanding, career preparation, career orientation, and capacity building on job commitment. In addition, we analyzed the satisfaction of college students' education opportunities by controlling effect. Through these researches, we confirmed the change of career understanding, career preparation, career orientation, capacity building training and willingness to work. The results of this study are summarized as follows. First, career understanding, career preparedness, and capacity building education showed a positive(+) influence on the will to work. However, career orientation has a negative(-) effect on the willingness to work. Second, we examined the moderating effect of satisfaction of educational opportunities. The satisfaction of educational opportunities for career orientation and willingness to work was found to be moderating.

게임 엔진 기반 Deep Drive 플랫폼 개발

김혁주 ( Hyeok-ju Kim ),김건하 ( Geon-ha Kim ),이은성 ( Eun-sung Lee ),곽동신 ( Dong-shin Kwak ),김수영 ( Su-young Kim ),임성비 ( Seong-bi Lim ) 한국정보처리학회 2017 한국정보처리학회 학술대회논문집 Vol.24 No.2

Deep Drive 플랫폼 개발 기술인 HILS(Hardware In the Loop Simulation)는 시스템 모델에 근간을 둔 실시간 시뮬레이션 기법과 H/W를 접목시킨 실시간 해석 기법으로, 플랫폼 개발으로 현재는 난해성이 있는 자율 주행 자동차 실차의 테스트 베드를 구현하여, 여러 가지 실험을 통해 실제 차의 운행에 대한 피드백을 제공, 운전자로부터 안전을 보장하기 위한 기술 보장. 기술의 상용화, 양산화 연구에 도움을 줄수 있음.

Thermal Resistance Matching을 이용한 열전소자 성능예측에 대한 실험적 연구

김혁주(Hyeok-Ju Kim),박성진(Seong-Jin Park),박종훈(Jong-Hoon Park),전언렬(Eon-Ryeol Jeon),장세구(Se-Gu Jang),나영승(Young-Seung Na) 대한기계학회 2019 대한기계학회 춘추학술대회 Vol.2019 No.11

가스터빈 연소기내의 선회분무연소 특성

홍정구,김혁주,Hong, Jeong-Gu,Kim, Hyeok-Ju 대한기계학회 1996 大韓機械學會論文集B Vol.20 No.8

The present study conducted experimental study of spray combustion to investigate the effect of the inlet conditions of fuel and air on the flame structure, the flame stability and the characteristics of emission in the can-type model of a gas turbine combustor. In the experiment, the diameter of fuel droplet was measured using Malvern particle size analyser and temperatures in the combustion chamber were measured with R-type shielded thermocouple. In addition, flame structure was taken picture with camera and analysed. Gas analyser was also used to analyse the concentration of each components of exhausting gas. The experimental results showed that the flame condition was optimal with swirl number, 0.63 and equivalence ratio, 0.5 for controlling the flame stability, the combustion temperature and the NOx concentration. The present study concluded that both the flame structure and the emission formation were strongly affected by the swirl intensity, which selection was found as an important parameter for either stabilizing flame or lowering the quantity of NOx.

노인의 여가활동만족과 심리적 안녕감에서 대인관계의 매개효과

주예원(Ye-Won Ju),김혁주(Hyeok-Ju Kim) K교육연구학회 2022 사회과학리뷰 Vol.7 No.3

본 연구의 목적은 노인의 여가활동만족이 심리적 안녕감에 미치는 영향에 관하여 대인관계의 매개효과를 중심으로 살펴보는 것에 있다. 이에 본 연구는 광주광역시에 소재한 노인복지관 및 관련시설을 이용한 65세 이상 노인들을 중심으로 설문을 실시하였고, 수집된 252부의 자료를 중심으로 SPSS Ver 21.0 프로그램을 통하여 분석하였다. 분석의 결과는 다음과 같다. 첫째, 노인의 여가활동만족이 높을수록 심리적 안녕감이 높아지는 것으로 나타났다. 둘째, 노인의 여가활동만족이 높을수록 대인관계도 높은 것으로 나타났다. 셋째, 노인의 대인관계가 높을수록 심리적 안녕감이 높아지는 것으로 나타났다. 넷째, 노인의 여가활동만족과 심리적 안녕감의 관계에서 대인관계의 매개효과가 나타났다. 이와 같이 노인의 여가활동만족이 대인관계에 영향을 미치는 것이 확인되었고, 대인관계가 심리적 안녕감을 높이는 데 의미 있는 매개변수로 검증되었으며, 노인의 다양한 여가활동을 통해 대인관계와 심리적 안녕감의 증진을 통하여 건강한 노후를 설계하는 것이 필요하다. The purpose of this study is to examine how the elderly's leisure activity satisfaction affects on psychological well-being, focusing on the mediated effect of interpersonal relationships. In this study, SPSS Ver 21.0 was used to analyze 252 copies of response collected via a survey conducted on elderly people aged 65 or older who used seniors welfare centers and related facilities located in Gwangju. The results of the analysis are as follows. First, the result shows that as the leisure activity satisfaction of the elderly gets higher, the psychological well-being also tends to be fulfilled. Second, the higher the leisure activity satisfaction of the elderly, the smoother the interpersonal relationship. Third, the smoother the interpersonal relationship of the elderly, the higher the psychological well-being. Fourth, it was found that interpersonal relationships had a mediated effect on the relationship between leisure activity satisfaction and psychological well-being of the elderly. As such, it was confirmable that the satisfaction of leisure activities of the elderly affects on interpersonal relationships, and interpersonal relationships were verified as a significant parameter for increasing psychological well-being. It is necessary to map out a healthy old age by promoting interpersonal relationships and psychological well-being through various leisure activities of the elderly.

진로결정수준과 진로교육의 관계에서 진로결정 자기효능감의 매개효과 분석

이보람(Bo-Ram Lee),김혁주(Hyeok-Ju Kim) 한국엔터테인먼트산업학회 2016 한국엔터테인먼트산업학회 학술대회 논문집 Vol.2016 No.11

본 연구는 대학생의 진로결정에 영향을 주는 요인들을 살펴보고 이를 반영한 효과적인 취업전략을 수립할 필요가 있다. 이에 진로를 결정하는 수준과 직업교육의 관계에서 진로결정에 대한 자기 신념인 진로결정 자기효능감이 어떠한 매개효과를 나타낼지 살펴보고자 한다. 진로교육의 직업이해 교육, 경력지향성 교육, 역량강화 교육이 진로결정수준에 따른 진로결정효능감에 대한 매개효과의 결과는 다음과 같다. 첫째, 직업이해 교육의 매개효과 분석결과를 보면 진로결정수준의 자기명확성 부족에 대한 직업이해 교육은 진로결정 자기효능감에 대한 통계적 유의수준에서 부분매개효과가 있는 것으로 나타났다. 둘째, 진로를 결정할 중요한 지표가 되는 경력지향성을 향상시키기 위한 교육은 진로결정 수준 하위요인과 진로결정 자기효능감에 미치는 영향에 대해 매개효과가 조건에 만족하지 않아 매개효과가 없는 것으로 나타났다. 셋째, 직업정보가 부족한 대학생에게 역량강화교육은 진로결정 자기효능감 향상에 완전매개효과 있는 것으로 나타났고, 자기명확성 부족에 대한 역량강화교육은 진로결정 자기효능감에 부분매개효과가 있는 것으로 나타났다. In this study, it is necessary to examine the factors influencing the career decisions of the college established an effective employment strategy reflects this. In determining the level of career and self-belief in the career decision in relation to vocational education and want a career decision self-efficacy is not represented at any mediating effect. Career Education career interests education, career orientation training, capacity-building training is a result of the mediating effect on the efficacy of the career decision career decision levels are as follows. First, look at the results showed the mediating effect of job analysis to understand educational career decision level of professional training for self-understanding is that there is a lack of clarity partial mediating effect on the level of statistical significance in the career decision self-efficacy. Second, education is subordinate factors in career decision level to improve career orientation which is the main indicator to determine the course was found to have no effect parameters do not meet the conditions mediated effects on the impact on career decision self-efficacy. Third, job information for college students lack of empowerment is education showed that full-mediated effect on career decision self-efficacy enhancement, empowerment training for his lack of clarity was found that the partial mediation effect on career decision self-efficacy.

진로결정수준과 진로결정 자기효능감의 관계에서 진로교육의 매개효과 분석

이보람(Bo-Ram Lee),김혁주(Hyeok-Ju Kim) 한국엔터테인먼트산업학회 2017 한국엔터테인먼트산업학회논문지 Vol.11 No.1

본 연구는 대학 저학년 시기부터 진로결정에 영향을 줄 수 있는 직업이해교육, 역량강화교육, 경력지향성교육의 영향력을 살펴보고 이를 반영한 효과적인 취업전략을 수립을 위한 진로교육의 필요성을 강조하고자 한다. 이에 진로를 결정하는 수준과 직업교육의 관계에서 진로결정에 대한 자기 신념인 진로결정 자기효능감이 어떠한 매개효과를 나타낼지 살펴보고자 한다. 진로교육의 직업이해 교육, 경력지향성 교육, 역량강화 교육이 진로결정수준에 따른 진로결정효능감에 대한 매개효과의 결과는 다음과 같다. 첫째, 직업이해 교육의 매개효과 분석결과를 보면 진로결정수준의 자기명확성 부족에 대한 직업이해교육은 진로결정 자기효능감에 대한 통계적 유의 수준에서 부분매개효과가 있는 것으로 나타났다. 둘째, 진로를 결정할 중요한 지표가 되는 경력지향성을 향상시키기 위한 교육은 진로결정 수준 하위요인과 진로결정 자기효능감에 미치는 영향에 대해 매개효과가 조건에 만족하지 않아 매개효과가 없는 것으로 나타났다. 셋째, 직업정보가 부족한 대학생에게 역량강화교육은 진로결정 자기효능감 향상에 완전매개효과가 있는 것으로 나타났고, 자기명확성 부족에 대한 역량강화교육은 진로결정 자기효능감에 부분매개효과가 있는 것으로 나타났다. The purpose of this study is to emphasize the necessity of career education for establishing an effective employment strategy that reflects the influence of career - oriented education, capacity -building education and career. In determining the level of career and self-belief in the career decision in relation to vocational education and want a career decision self-efficacy is not represented at any mediating effect. Career Education career interests education, career orientation training, capacity-building training is a result of the mediating effect on the efficacy of the career decision career decision levels are as follows. First, look at the results showed the mediating effect of job analysis to understand educational career decision level of professional training for self-understanding is that there is a lack of clarity partial mediating effect on the level of statistical significance in the career decision self-efficacy. Second, education is subordinate factors in career decision level to improve career orientation which is the main indicator to determine the course was found to have no effect parameters do not meet the conditions mediated effects on the impact on career decision self-efficacy. Third, job information for college students lack of empowerment is education showed that full-mediated effect on career decision self-efficacy enhancement, empowerment training for his lack of clarity was found that the partial mediation effect on career decision self-efficacy.

곰팡이 독소 동시 분석용 간이진단키트 최적화 연구

문지혜 ( Ji Hea Moon ),김기영 ( Gi Young Kim ),이상대 ( Sang Dae Lee ),박샛별 ( Saet Byeol Park ),김혁주 ( Hyeok Ju Kim ) 한국산업식품공학회 2012 산업 식품공학 Vol.16 No.3

This study was performed to develop and optimize a rapid strip kit for the dual-detection of Aflatoxin B1 (AF) and Ochratoxin A (OTA). The strip kit is composed of sample pad, conjugation pad, nitrocellulose membrane, and absorbent pad. Manually spotted mycotoxin-BSA conjugates and anti-mouse IgG on nitrocellulose membrane were used as the test line and the control line, respectively. Conditions for rapid and easy detection of mycotoxins, conjugation between toxin-MAbs and nano Au particles, pretreatment method of pads, and composition of standards solutions were optimized. Feasibility of the strip kit to detect AF and OTA were evaluated with standard samples. Test results were acquired in 10 min and the detection limits were 100 ppm for AF and OTA, respectively.