진공단열재의 단열성능을 개선을 위한 Glass Fiber 수평 배열(다층구조) 기술 개발

한정필,황승석,전승민,민병훈 한국진공학회 2012 한국진공학회 학술발표회초록집 Vol.2012 No.8

Circuit training이 남자중학생의 건강관련체력에 미치는 영향

한정필,김명일 한국스포츠리서치 2006 한국 스포츠 리서치 Vol.17 No.4

근대5종 선수의 트레이닝 방법에 따른 스트레스 호르몬과 경기력에 미치는 영향

한정필(Jung Pil Han),최재현(Jae Hyun Choi) 한국사회체육학회 2007 한국사회체육학회지 Vol.0 No.29

집단지성을 위한 개방 협업 플랫폼 디자인: 오픈 소스 소프트웨어 개발 사례를 통해

한정필 ( Jung Pil Han ),문재윤 ( Jae Yun Moon ),최정홍 ( Jung Hong Choi ),최주희 ( Joo Hee Choi ),김진우 ( Jin Woo Kim ) (주)엘지씨엔에스(구 LGCNS 엔트루정보기술연구소) 2013 Entrue Journal of Information Technology Vol.12 No.1

유비쿼터스 정보통신 환경의 발전으로 인해, 대중의 자발적인 참여와 지식 공유로 집단 지성을 극대화하기 위한 연구가 활발하게 이루어지고 있다. 오픈 소스 소프트웨어 프로젝트는 인터넷의 공개 협업 플랫폼을 기반으로 다수의 개발자가 참여하고 있다. 특히 인터넷 인프라의 상당 부분은 아파치 웹서버, 리눅스 운영체제 등 오픈 소스 소프트웨어가 기반이다. 그래서 오픈 소스 소프트웨어 프로젝트를 집단 지성의 가능성을 대변하는 사례로 많이 거론한다. 그러나 그중 집단의 지성을 이끌어 내는 데 성공하는 사례는 극히 일부분이다. 실제로는 다수의 참여를 유도하지 못해 실패하거나, 다수가 참여해도 실패한다. Sourceforge 혹은 Github 등의 프로젝트 플랫폼에는 누구나 자발적으로 참여할 수 있다. 두 협업 환경은 기능의 차이 때문에 프로젝트의 생성, 집약, 분포, 소멸 과정에서 많은 차이를 보인다. 이 논문에서는 오픈 소스 소프트웨어 개발을 위한 협업 플랫폼에 대한 사례를 연구해 다수가 자발적으로 참여하는 개방 협업 플랫폼이 개발과정에 미치는 영향에 대해 살펴본다. The promise of collective intelligence emerging from voluntary participation, contribution and knowledge sharing brought about by ubiquitous information and communication technologies has recently attracted the attention of academics and practitioners alike. Of many related phenomena, open source software (OSS) development has been touted as one of the leading examples that speak to the potential of collective intelligence. In fact, much of today`s Internet infrastructure depends on OSS such as the Apache web server or the Linux operating system. However, such high-profile cases are unfortunately the exception rather than the norm - the vast majority of OSS projects fail to take off and are abandoned. Recently, the advent of novel open collaboration platforms for open source software development, such as Github, has prompted researchers to go beyond investigating OSS phenomena at the project level to understanding how the design of open collaboration platforms may impact the overall sustainability of open source software more broadly. For example, stark differences are shown with respect to overall rates of project initiation, distribution of open source projects, concentration of developer activities, and rates of project abandonment across open collaboration platforms such as Sourceforge and Github, two open platforms that offer different approaches to collaborative work. This paper builds on our past work investigating developer behaviors on Sourceforge and Github to derive insights into how the design and structure of open collaboration platforms may influence the broader sustainability of open source software development.

온라인 커뮤니티 간 공존 : 생태학적 관점의 에이전트 기반 시뮬레이션

Luyang Han,한정필 한국경영정보학회 2017 Information systems review Vol.19 No.2

자연과학편 : 트레이닝 방법이 근대5종선수의 피로물질과 수영, 육상 경기력에 미치는 영향

최재현(JaeHyunChoi),한정필(JungPilHan) 한국체육학회 2007 한국체육학회지 Vol.46 No.3

이 연구는 남자 실업팀 근대5종 선수 16명을 대상으로 주 6일 하루에 4종목 트레이닝집단(FG) 8명과 수영과 육 상을 격일로 실시한 하루에 3종목 트레이닝집단(TG) 8명으로 분류하여 12주간 트레이닝 전·후의 안정시, 운동직 후, 회복기 20분의 변화를 비교 분석하였다. 피로물질을 분석하기 위한 실험 프로토콜로 95%HRmax에서 3분간 운동과 3분간 휴식을 3회 반복하는 달리기를 실시하여, 안정시, 운동직후, 회복기20분의 혈액을 채취하여 분석하였고, 수영(Crawl : 200m)과 육상(3,000m)기록은 12주간 트레이닝 전과 후에 측정하였다. 연구 결과는 혈중젖산의 집단간 변화율은 안정시에서 회복기 20분의 사후에 TG가 FG보다 안정시로의 회복이 빨랐다. LDH의 집단 간 변화율은 안정시에서 운동직후의 사후비교에서 TG가 FG보다 적게 축적되었다. 집단간 수영기록은 TG가 FG보다 유의하게 단축되었다. 육상기록은 집단간 유의한 차이가 없었다. This study has analyzed the changes of fatigue material and performance at training method between three event training group(TG) and four event training group(FG) for 12weeks in male modem pentathlon athletes(n=16). Training program lasted 12weeks and Participant were randomly divided into FG group(n=8)and TG group(n=8). Fatigue material of the participants were measured by running track at 95% HRmax and 3 min interval training were operated 3 times, Performance of the participant were measured by swimming(200m) and running(3/000m). As for the change rate of the blood lactic acid among groups, FG appeared higher than TG at 20 min of recovery on post test. As for the change rate of the lactate dehydrogenase among groups, FG right after the training was higher than TG at post test. As for the change rate the ammonia among groups, there was no difference at any time. As for swimming, it appeared to have improved at post compared to pre from both groups. As for the change rate at pre to post among groups, TG group was improved more than FG. As for running, it appeared to have improved at post compared to pre from both groups. As for the change rate at pre to post among groups, no difference appeared among groups.

The Coexistance of Online Communities: An Agent-Based Simulation from an Ecological Perspective

Luyang Han,한정필 한국경영정보학회 2017 Information systems review Vol.19 No.2

Online communities have become substantial aspects of people’s daily lives. However, only a few communities succeed and attract the majority of users, whereas the vast majority struggle for survival. When various communities coexist, important factors should be identified and examined to maintain attraction and achieve success. The concept of coexistence as been extensively explored in organizational ecology literature. However, given the similarities and differences between online communities and traditional organizations, the direct application of organizational theories to online contexts should be cautiously explored. In this study, we follow the roadmap proposed by Davis et al. (2007) in conducting agent-based modeling and simulation study to develop a novel theory based on the previous literature. In the case of two coexisting communities, we find that community size and participation costs can significantly affect the development of a community. A large community can attract a high number of active members who frequently log in. By contrast, low participation costs can encourage the reading and posting behaviors of members. We also observe the important influence of the distribution of interests on the topic trends of communities. A community composed of a population that focuses on only one topic can quickly converge on the topic regardless of whether the initial topic is broad or focused. This simulation model provides theoretical implications to literature and practical guidance to operators of online communities.

자연과학편 : 운동형태에 따른 운동과 운동중단 시 비만 중년여성의 신체구성 및 혈중지질 비교 분석

최재현(JaeHyunChoi),양점홍(JumHongYang),한정필(JungPilHan) 한국체육학회 2006 한국체육학회지 Vol.45 No.3

이 연구는 체지방률 30% 이상인 비만 중년여성 24명을 대상으로 달리기집단(8명), 달리기와 웨이트 복합집단(8명)과 통제집단(8명)으로 나누어 10주간 주5회 트레이닝 후와 운동중단 4주후의 신체조성과 혈중지질의 변화를 비교분석하였다. 달리기집단의 1일 운동은 달리기운동만 55~70% HRmax 강도로 실시하였으며, 달리기와 웨이트 복합집단은 55~70% HRmax 강도의 달리기와 웨이트 트레이닝을 50~60 1RM로 복합하여 실시하였다. 집단간 운동전에서 운동후의 변화율을 비교한 결과 달리기집단이 달리기와 웨이트 복합집단보다 체지방율, TC, TG, HDL-C, LDL-C에서 유의하게 감소하였으며, 제지방량은 달리기와 웨이트 복합집단이 유의하게 감소하였다. 그러나 운동전에서 운동중단 4주 후에는 달리기만 실시한 집단이 체지방률, 제지방량, TC, TG, LDL-C에서 운동전으로 회귀율이 높았다. 따라서 현대사회가 장기적인 운동을 규칙적으로 지속하기 어렵기 때문에 기초대사양을 높일 수 있는, 제지방량을 증가시킬 수 있는 운동처방이 필요하고, 이러한 제지방량이 운동처방으로 얻은 효과가 운동전으로 회귀되는 것을 줄일 수 있을 것이다. This study has analyzed the changes of body composition and blood lipid profile following exercise and detraining between the group having running training and combined weight training with running, the middle-aged obese women(n=24) with over 30% of body fat mass trained 10weeks dividing into 3group, which are running training(RT; n=8), combined weight training with running(WT; n=8) and control group(CT; n=8) for determine the effect on exercise and detraining between groups. The RT group was operated only running (55~70% HRmax), and WT group was operated combined weight training(50~60 1RM) with running training(55~70% HRmax) for 5day with 10week. Measuring materials were body fat mass, lean body mass, TC, TG, HDL-C and LDL-C. The result of the study can be described as follows; 1) The body fat mass, TC, TG and LDL-C decreased more significant at post-exercise from RT and WT groups compared to the pre-exercise, and lean body mass increased more significant at post-exercise from WT groups compared to the pre-exercise. 2) As for change-rate difference of body fat mass TC, TG and LDL-C between groups, RT group increased more significant than WT at post-exercise from pre-exercise, and in lean body mass, WT increased more significant than RT at 10week of exercise. however, body fat mass, lean body mass, TC, TG and LDL-C on WT groups lower more significant than RT groups after detraining(4weeks), and in HDL-C no significant Between groups.

경영혁신을 위한 일流시스템 평가구조 및 기준에 대한 연구

김용우,김진우,문재윤,정철범,한정필 한국경영과학회 1995 經營 科學 Vol.12 No.3

The changing business environment requires that firms reengineer their fundamental processes in order to retain their competitive advantage. Most Business Process Reengineering(BPR) projects, however, have failed partly because the essential enabler, ie. information technology, was unable to perpetuate the original vision. The information systems were unable to support the collaboration among the workers participating in the process. Workflow Management Systems(WfMS) have the potential to enhance not only individual performance as did traditional information systems, but also the group performance essential to the success of BPR by providing an effective means of communications through connectivity. It also enhances productivity through proceduralization of the fundamental processes, thus making it possible to empower the employee even while it controls the flow, and ultimately the delay that originally made the BPR effort necessary. Therefore, though it is not a panacea, WfMS's can improve chances for the success of BPR projects. Managers who have realized this are faced with another obstacle - that of selecting the WfMS that best meets the particular organization's needs. This paper provids an evaluation structure of WfMS functions with emphasis on those functions that are essential for BPR, classifying the functions into an attribute hierarchy according to the Analytic Hierarchy Process(AHP) approach. It also suggests specific evaluation criteria for the main workflow functions provided by most vendors today, thus providing managers with a comprehensive guideline to facilitate the decision process.

Kefir grain에 의한 유청발효액의 특성과 human mast cell-1 (HMC-1)에서 염증 cytokine 조절에 미치는 영향

손지윤(Ji Yoon Son),박영우(Young W. Park),렌친핸드(Gereltuya Renchinkha),한정필(Jung Pil Han),범진우(Jin Woo Bum),백승희(Seung-Hee Paik),이조윤(Jo Yoon Lee),남명수(Myoung Soo Nam) 한국생명과학회 2016 생명과학회지 Vol.26 No.6

Kefir는 약한 신맛과 백색의 끈적한 특징을 가지는 산성-알코올성 발효유제품이다. Kefir는 오랫동안 probiotic 미생물로 면역조절 효과를 포함한 건강에 도움이 되는 발효유로 알려져 왔다. 본 연구는 Kefir grain를 이용한 유청발효액의 발효특성과 pro-inflammatory cytokine의 발현과 분비에 미치는 영향을 in vitro 실험을 통하여 조사하기 위해 수행했다. Kefir grain를 이용한 유청발효액의 유산균수와 효모수는 발효 16시간에 최고 수준인 1.83×10<SUP>8</SUP> CFU/ml, 6.5×10<SUP>5</SUP> CFU/ml로 나타났다. 또한 유당과 유청단백질은 부분적으로 가수분해되었다. Human mast cell (HMC)-1을 이용하여 in vitro에서 조사한 항염증 효과는 8, 16, 24시간 동안 발효한 유청발효액에서 pro-inflammatory cytokine인 interleukin (IL)-4가 발현되었으나 48시간 유청발효액에서는 발현되지 않았다. 또한 IL-8도 8, 16, 24시간 동안 발효한 유청발효액에서 발현되었으나 48시간 유청발효액에서는 발현되지 않았다. 이러한 cytokine들의 분비는 IL-4는 8, 16, 24시간 동안 발효한 유청발효액에서는 20-25 ng 정도였으나 48시간 유청발효액에서는 5 ng 정도로 낮았다. IL-8은 8, 16, 24시간 발효한 유청발효액에서는 15-20 ng 분비되었으나 48시간 유청발효액에서는 8 ng 정도로 낮았다. 이와 같이 Kefir grains을 이용한 유청발효액은 항염증 기능이 있어 기능성 식품소재와 의약품 소재로 응용할 수 있을 것으로 판단된다. Kefir is an acidic-alcoholic fermented milk product originating from the Caucasian mountains. Kefir has long been known for its probiotic health benefits, including its immunomodulatory effects. The objectives of this study were to investigate the properties of a fermented whey product and to examine the effects of kefir grains on the in vitro immune-modulation of human mast cell-1 (HMC-1). The results showed that the whey fermented by kefir grains contained the maximum lactic acid bacteria and yeast for 16 hr by 1.83×10<SUP>8</SUP> and 6.5×10<SUP>5</SUP> CFU/ml, respectively, and lactose and whey proteins were partially hydrolyzed. The experimental whey fermented by kefir grains exhibited an in vitro anti-inflammatory effect on the HMC-1 line for 8, 16, and 24 hr, and this effect induced the expression of interleukin (IL)-4 as a pro-inflammatory cytokine, but not for 48 hr by RT-PCR in HMC-1 cells. In addition, the same phenomenon was observed for the expression of IL-8 as a pro-inflammatory cytokine by the kefir-fermented whey during the same periods of 8-48 hr under the same conditions. These cytokines resulted in the production of IL-4 at 20-25 ng in HMC-1 cells for 8, 16, and 24 hr, whereas 5 ng was produced for 48 hr by the fermented whey. In contrast, IL-8 was produced at 15-20 ng in HMC-1 cells during 4, 8, 16, and 24 hr, while 7 ng was produced at 48 hr. It was concluded that the whey fermented by kefir grains possesses a potential anti-inflammatory function, which could be used for an industrial application as an ingredient of functional foods and pharmaceutical products.