Circular Annulus 대 회전 이층유체 실험

황병준,나정열,Hwang, Byong-Jun,Na, Jung-Yul 한국해양학회 1999 바다 Vol.4 No.1

본 이층 유체 실험의 목적은 하층유체가 외부유체의 유입 유출로 움직일 때 그에 따른 상층유체의 경압적인 응답을 연구하는 것이다. 최근에 관측된 용해 심층해류의 순압성 특성(Takematsu et al., 1994; 한국해양연구소, 1997)을 고려할 때 상층은 이러한 동해 심층수의 움직임을 경계면의 변형을 통해 느낄 수 있을 것이다. 본 실험은 이러한 경계면의 변형에 영향을 주는 요인들을 연구함으로써 전체적인 동해의 해수순환 혹은 국지적인 해수순환을 파악하고자 하였다. 정상적(steady)인 축대칭의 유입 혹은 유출실험은 균질 유체의 경우, 축대칭의 지형류를 야기시키며 이층유체의 하층유체 흐름도 유사한 특성을 가졌다. 그러나 로스비 수(${\varepsilon}$) 혹은 내부 프라우드 수($f_2$)가 증가하면서 하층유체의 운동은 경계면 변형에 영향을 받았다. 상층유체의 최대속도는 ${\varepsilon}f_2$에 매우 의존적이며, 그 흐름은 거의 포물선 형태를 보였다. 관찰된 상 하층유체의 속도로부터 계산된 경계면의 기울기는 ${\varepsilon}f_2$에 따라 커졌다. 즉 ${\varepsilon}f_2$의 증가는 이층유체가 순압적인 구조에서 경압적인 구조로 바뀌게 하였다. The purpose of this study is to investigate the baroclinic response of the upper-layer of two-layered fluid when the lower-layer motion is driven by pumping an external fluid into the lower-layer or by pumping out the lower-layer fluid. Recent observations of the barotropic nature of deep water movements in the East Sea (fakematsu et al., 1994; KORDI, 1997) may suggest a possibility of interaction between the upper and lower layer via interface tilting. For homogeneous fluid, steady and axisymmetric source or sink causes axisymmetric geostrophic flow, and the lower-layer motion in two-layered fluid was similar to homogeneous flow. But as Rossby number (${\varepsilon}$) or internal Froude number ($f_2$) increases, the lower-layer motion was affected by the interface tilting. The interface tilting calculated based on the observed azimuthal velocities of upper- and lower-layers becomes greater as $f_2$ increases. In other words, the increase of the $f_2$ changes the barotropic system to baroclinic system.

낙상 경험 유무에 따른 노인 여성의 허리와 무릎관절 근력 비교 연구

황병준,김종우,최운호,Hwang, Byeong-jun,Kim, Jong-woo,Choi, Woon-ho 대한정형도수물리치료학회 2015 대한정형도수물리치료학회지 Vol.21 No.1

Background: This study was conducted in order to see if muscle strength is different according to fall experience in female elders by comparing their muscle strength of waist and knee, which is one of factors inducing fall. Method: For this study, 22 female elders aged over 65 sampled from senior centers in D City were surveyed on their fall experiences using a questionnaire asking clinical history. Then, 8 elders with fall experience (FE) and another 8 without (NFE) were selected and participated in the research. Isokinetic muscle strength was measured with isokinetic equipment BIODEX SYSTEM 3 PRO, and the peak torque was obtained from the highest of 9 measurements at angular velocity $60^{\circ}/sec$ according to the method recommended in the manual. Measured items were waist flexion and extension, and knee flexion and extension. Results: The FE group showed higher extensor and flexor muscle strength of the waist, but the difference was not significant (p<.05). In addition, no difference was observed in extensor muscle strength of the knee (p<.05). In flexor muscle strength, however, the FE group was significantly higher than the NFE group (p<.05). Conclusion: The application of regular exercise programs for improving muscle strength, endurance, etc. to those with fall experience will be effective in preventing falls among them.

기독교사학의 학원선교사 파송정책에 관한 연구 -기독교대한감리회를 중심으로-

황병준 ( Byung-june Hwang ) 한국대학선교학회 2018 대학과 선교 Vol.36 No.-

본 연구는 기독교사학의 학원선교를 위한 학원선교사 파송정책의 분석을 통해 한국 기독교사학의 선교현실과 학원선교사를 활용한 선교정책의 선교방향성을 제시하고자 한다. 한국기독교학교연맹의 통계에 따르면 미션스쿨은 초등학교 10개, 중학교 119개, 고등학교 161개, 대학 16개, 대학교 33개 등 모두 339개이다. 대한민국 전체 학교 수, 22,159개를 기독교학교 339개로 비교하면, 기독교사학은 전체 학교 수에 비해 1.5% 밖에 안 된다. 그럼에도 불구하고 이곳을 통해 배출되는 학생만 매년 60,000명에 달한다. 하지만 각 교단의 관심과 지원은 거의 없는 실정이다. 교육선교에 뜻을 두고 학교를 설립한 설립재단 이사들과 몇몇 교회가 관심을 가지고 지원하고 있는 실정이다. 학원선교사와 관련된 감리교 장정 개정이 2015년 이루어졌다. 학원선교사는 ‘수련 학원선교사’와 ‘학원선교사’로 구분되는데, 수련 학원선교사는 수련목회자 선발고시에 합격한 이로서 교육국 학원선교사 선발위원회의 인준을 받아 이를 선발하고 ‘수련학원선교사’로 호칭하며 기존 학원선교지에서 2년간 교육국과 학원선교회의 지도하에 학원선교에 대한 이론과 선교실습을 한다. 학원선교사 관리규정 개정안은 미래 다음세대(어린이, 청소년, 청년)의 부흥과 발전을 위하여 이들의 주 활동 무대인 캠퍼스선교를 효율적으로 행하기 위해 학원선교사를 파송한다는 개정이다. 따라서 본 연구는 첫째, 교단별 교세감소현황 및 다음세대 감소원인을 고찰하고, 둘째, 학령인구감소와 비종교인 숫자의 증가를 살펴보고, 셋째, 기독교사학 선교대상현황 및 학원선교사의 역할을 살펴보고, 넷째, 감리교 학원선교사 관리규정개정안 분석 및 주요내용평가를 통해 학원선교사 파송과 관리를 통한 학원복음화 방향성을 제시하고자 한다. This study aims to understand the status of missionary work at Christian schools and to analyze the “School Missionaries” policy at the Korean Methodist Church for educational missionary work and to suggest a sugges-tion based on the revised rules for implementing them. Through this, the study would like to suggest the missionary policy and direction of Korean Christian schools. The latest figures for each ministry indicate a decline in the number of church members, especially the younger generation, although the number of churches continues to grow. Many of the existing church members have moved to different religions or become anti-Christians, most of all, the younger generation is no longer going to church. Among other things, communication with the next generation has become a major problem. The church is not communicating with society, not with the young, and is just trying to stay afloat. The importance of missionary work at schools for the next generation is more important than ever. A Methodist law revision concerning school missionaries was made in 2015. School mis-sionaries are divided into "missionaries of the intern“ and "missionaries of educational missionaries," who passed the examination to be selected as mis-sionaries of the training institutions, and received confirmation from the Missionaries Selection Committee of the Ministry of Education and Missionaries of Education in Korean Methodist Church. The main contents of the revision to the "School Missionaries" management rules are changes in their intent and purpose. The revision also provided a revision to the dis-patch of missionaries to the school to efficiently conduct missionary work on the campus for the rehabilitation and development of the next generation (children, teens, and young adults), the future of the Methodist Church. Therefore, purpose of this study is to examine the present situation of Christianity reduction and the cause of decline of the next generation. Secondly, it examines the decrease of the schooling population and increase of the number of non-religions in the next generation. Third, the study will suggest the status of Methodist schools and the necessity of missionary work at private and public institutions. Finally, the study is to present a direction for the reform of the Methodist missionary management policy and the evan-gelization of private and public institution through the dispatch and manage-ment of missionaries.

폐목질을 혼입한 시멘트판의 강도와 열전도율 특성

황병준(Hwang Byoung-Jun),정광식(Jung Kwang-Sik),김광기(Kim Kwang-Ki),박희곤(Park Hee-Gon),강태경(Kang Tae-Kyoung),정상진(Jung Sang-Jin) 대한건축학회 2004 大韓建築學會論文集 : 構造系 Vol.20 No.10

With environmental contamination and the exhaustion of natural resources due to the rapid industrialization, there are growing concerns over the preservation of the environment and resources and as a result research on recycling wastes such as wood waste is being actively carried out.<br/> Thus, in order to promote the effective use of wood waste and to examine the characteristics of cement boards that are made of wood waste from wood, an environment-friendly material, and can be used as insulating and fire-proofing materials, this study purposed to investigate the properties of mortar made of sawdust and cement, which is an inorganic material used as a binder, to determine the optimal proportion of congelation accelerator, and ultimately to provide basic materials on the physical properties of woody cement boards.<br/> According to the result of this study, the most economically efficient proportion of congelation accelerator CaCl₂ is 4%, and when the proportion of wood increases the specific gravity of cement boards goes down and physical properties such as heat conductivity are Improved.

상지의 탄력저항 운동이 낙상경험 노인의 보행과 균형 능력에 미치는 영향

황병준(Byung Jun Hwang),김차용(Cha Yong Kim),이대연(Dae Yeon Lee) 한국사회체육학회 2006 한국사회체육학회지 Vol.0 No.28

요부안정화운동이 여성 노인의 요부 및 하지 근력에 미치는 영향

황병준 ( Byeong Jun Hwang ),김종우 ( Jong Woo Kim ) 대한물리의학회 2011 대한물리의학회지 Vol.6 No.3

Objective:This study aims to examine how lumbar stabilization exercise and resistive exercise affect lumbar and lower extremity muscular strength of the aged. Method:Randomly selected 15 female senior citizens aged 65 or older at S, Y, and J senior citizens` center located in D city who meet the requirements for the study were divided into a resistive exercise group of 7 and a stabilization exercise group of 8 for which 60-minute-exercise sessions were administered three times a week for 12 weeks. Measuring lumbar and lower extremity muscular strength was measured six weeks and 12 weeks after exercise, respectively. Results:First, both resistive exercises and stabilization exercises are effective to improve lumbar muscular strength. Second, resistive exercise is effective to improve flexural muscle strength as well as lower extremity muscular strength, and stabilization exercise is effective for both flexion and extensor muscle strength. Conclusion:The 12 week lumbar stabilization exercise program appeared to be effective to improve lumbar and lower extremity muscular strength of the aged. This indicates that applying this program to identify and prevent frequent risk factors of falling can lead to the prevention of secondary problem factors of falling accidents.

절기예배와 기독교교육의 새 패러다임을 위한 제언

황병준(Byung-June Hwang) 한국기독교교육정보학회 2009 기독교교육정보 Vol.24 No.-

This study articulates the educational issues of seasonal worship following the Christian church calendar. The methods of this research are derived from the questions regarding Christian education following the church calendar, historical teaching methods by the Hebrews for their next generation, and the development of the seasonal worship in the early church. The final question has drawn upon the ways seasonal worship is celebrated in the contemporary church. Celebrating seasonal worship stands at the forefront of church worship. Then, how can the modem church interest people to become involved in and to educate people in the deep implications of seasons in church calendar? How can it be developed to connect faithful education and seasonal worship? What is the issue of Christian education relating to seasonal worship in the changing circumstances? Underlying the questions raised above, this research examines the historical background of the church calendar and its meaning in formatting seasonal worship. Next, this study is about 'what to teach' regarding the contents and meanings of the church calendar. The final part of this study suggests 'how to teach', the methodology of seasonal worship, ways of 'curriculum reformatting', 'teaching and learning methods', and the 'ecology of seasonal worship'. To redesign curriculum, this study suggests potential ideas of methods for explicit, implicit, and null curriculum. Types of teaching and learning methods suggested are experimental, reflective, and relational learning methods. The ecology of seasonal worship provides a way of inter-generational faithful education, development of partnership, and formation of a faithful community.

전동식 오일 펌프의 고장 진단 요구사항 설계 및 검증

황병준(Byung Jun Hwang),김종찬(Jong-Chan Kim) 한국자동차공학회 2023 한국자동차공학회 부문종합 학술대회 Vol.2023 No.5

This paper proposes design and validation of fault diagnosis for electric oil pumps used in vehicle. There can be various requirements for a malfunction diagnosis, but it is difficult to analyze without understanding the characteristics of an electric oil pump. The proposed method provides how to analyze the fault diagnosis requirements of electric oil pumps and state machine model designs to implement source code and validate with system implementation. This method will be necessary to predict various fault situations and determine the actions to be taken in each situation. Also it presents a way to ensure consistency between fault diagnosis requirements and the implementation.

순환전압전류법을 이용한 수중 생물막 측정 전기화학센서

황병준 ( Byeong Jun Hwang ),이성호 ( Sung Ho Lee ) 한국센서학회 2012 센서학회지 Vol.21 No.5

Biofouling causes many problem in industrial processes, medical health industries, water utilities and our daily life, So detecting formation of biofilm on the surface of medical appliance, water pipe and industrial utility is highly important to prevent the problem caused by biofouling, In this study, we suggest an electrochemical sensor for detecting biofilm, We fabricated the electrochemical sensor in MEMS process and cultivated two different kinds of Pseudomonas aeruginosa RpoN type and Wild type on the surface of electrochemical sensor. Each group of Pseudomonas aeruginosa was cultivated according to the hours of 2, 4, 6, 8, 12 and 24. Then we investigated changes in degree of biofilm cultivation using cyclic voltammetry. As a result, it was observed that peak of the cyclic voltammetry curve is increased according as the biofilm growth on the surface of electrochemical sensor. Also we can discern between Pseudomonas aeruginosa RpoN type and Wild type.

요부근의 운동유형에 따른 상ㆍ하지 등속성 근기능에 미치는 효과

황병준(Hwang Byeong-Jun),이원재(Lee Won-Jae),김종우(Kim Jong-Woo) 한국체육과학회 2010 한국체육과학회지 Vol.19 No.3

This study was aimed to examine the necessity of researches for resistance exercise and lumbar stabilization exercise as a way to lead to the improvement of exercise performance in actual sports fields and the effects of arm & leg isokinetic muscular functions caused by lumbar exercise type. For the development and application of more varied training methods, this study randomly selected 14 male adults in their twenties each 7 per group residing in D City and resistance exercise and stabilization exercise were conducted for control group and experimental group, respectively. The participants were asked to do exercise for 50 minutes an hour after their meals three times a week for 8 weeks in the exercise center of B Hospital in D City. An arm & leg iso-kinetic muscular function test was conducted before exercise, after 4 weeks and after 8 weeks. As for data treatment, a two-way repeated measure ANOVA was conducted for the analysis of the differences among groups and time periods. In case that there were significant differences among the types of exercises by period, the independent sample t-test as a post-hoc test and the contrast test after the one-way repeated measure ANOVA as a test among the periods by exercise types were conducted. After conducting the researches, the following results have been found. lumbar stabilization exercise groups had a positive effect on the improvement of arm & leg muscular functions, the arm & leg power functions, arm & leg muscular endurance test.