근대스포츠의 수용과 전통스포츠의 근대화 양상에 관한 연구

오정석 한국체육사학회 1997 체육사학회지 Vol.2 No.-

The purpose of this study was to consider on the development aspects and the characters of Korean folk game at modernization era. In that context both the meaning of modernization in the history of Korea entering to the modern times and the formation and character of modern sports are covered in this study. Modernity generally means as both historical and philosophical concept. Historically, modern times is placed behind the ancient times and the medieval times. Philosophically, it could stand for the "Enlightement" which included three specific notions - credit for reason change in point of view for nature, belif in progressiveness by science. With unorganized structure, sports or game have made preperatory roles for the appearance of modern sports until 18 century. But late 18 century, the folk game or pre-modern sports began to weaken, which was probably influenced by agricultural revolution. Meanwhile modern sports came to have a firm stand in England first through 18th, 19th century and gradually began to be spread into America and some European countries. Korea shows unique situation that tradition and modernity coexist thanks to much shorter period in modernization process than Western countries. That brought about sudden changes in many fields as well as in the field of sports.

Characterization of bacteriophage λ mutants for stable and highly productive continuous culture

오정석,박태현 한국화학공학회 2007 화학공학의이론과응용 Vol.10 No.1

미생물 연속 배양에서 플라스미드 안정성을 높여 생산성을 증가 시키려는 많은 연구가 진행되었고, 그 중에서 박테리오파아지의 특성을 이용한 연구가 수행되었다. 박테리오파아지 람다는 host cell을 죽이는 virus이므로 재조합 단백질이 충분히 생산되기 전에 DNA가 packaging되고, host cell을 죽이게 되어서 발현 시간이 짧은 문제점이 발견되었다. 이를 극복하기 위해서 두 가지 strain을 선별하여 비교 분석하였고, 온도에 따른 경향을 분석하면서 최적화를 수행하였다. λHL1은 packaging이나 cell lysis에 관여하는 단백질의 발현을 조절하는 Q gene의 mutant이고, λNM1070은 packaging에 관여하는 W, Egene과 lysis에 관여하는 S gene mutant이다. Q amber mutant의 leakage에 의해서 λHL1은 phage가만들어지고, cell lysis가 일어났다. 반면에 λNM1070은 W, E amber mutation에 의해서 phage가 만들어 지지 않았고, lysis gene인 S mutant에 의해서 cell viability를 연장되는 결과를 보였다. 따라서 생산성이나 안정성 면에서 λNM1070이 더 좋은 결과를 나타내었다. 그러나 λHL1은 Q gene leakage에 의 해서 생성된 phage가 segregational instability에 의해서 생긴, 람다가 들어있지 않은 cell을 재감염을 시켜서 phage을 만들지 못하는 λNM1070보다 더 높은 유전자 안정성을 나타내었다. λNM1070의 온도에 대한 생산성이나 안정성 면을 비교하면 생산성 면에서 40°C, 안정성 면에서는 38 °C가 최적의 생산조건을 나타내었다.

모바일 인터넷 비즈니스에서 수익분배 현황과 관련 이슈

오정석,김동희,김다영,오윤선 에스케이텔레콤 (주) 2011 Telecommunications Review Vol.21 No.1

최근 모바일 인터넷 시장의 폭발적 성장세는 플랫폼 사업자를 중심으로 모바일 컴퓨팅과 컨텐츠 가치사슬이 재편되면서 촉발되었다. 과거 통신 사업자를 중심으로 한 모바일 인터넷 시장 진흥 전략이 예상보다 부진한 성과를 거두는가운데 나타난 현상이기에 그 차이점에 대한 원인 분석이 매우 중요하다고 할 수 있다. 플랫폼 사업자의 생태계 전략은 과거와는 달리 개발자 및 컨텐츠 사업자들의 핵심 사업 영역 존중과 이를 바탕으로 상생을 추구한 점이 핵심적인 원인으로 분석되고 있다. 이러한 모바일 플랫폼 사업자의 생태계 전략 핵심에는 파격적인 수익분배 전략의 성공적 정착과 실행이 자리잡고 있다. 이에 본 논문에서는 모바일 인터넷 산업을 둘러싼 수익분배 실태와 관련 이슈를 살펴보고이로부터 얻을 수 있는 전략적 교훈을 정리하고자 한다.

Tribological Performance of Cu-Ni Alloy Nanoparticles Synthesized using a Pulsed-Wire Evaporation Method

오정석,이창규 대한금속·재료학회 2008 METALS AND MATERIALS International Vol.14 No.4

Cu-Ni alloy nanoparticles were produced using a pulsed-wire evaporation method in Ar gas. The synthesized Cu-Ni alloy nanoparticles had an average size of 150 nm, were spherical in shape and agglomerated. We investigated the tribological properties of dispersion-stabilized Cu-Ni alloy nanoparticles when used as a solid lubricant in oil at ambient temperature. The sedimentation behavior of Cu-Ni alloy nanoparticles in oil was examined using Turbiscan LAb. The particles were clearly quantified using delta backscattering profiles and peak thickness kinetics as functions of time. The rubbing surfaces were characterized after a friction test using scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). We found that dispersed Cu-Ni nanoparticles as a solid lubricant in oil had superior dispersion stability properties for over 48 h. Dispersed Cu nanoparticles in oil showed a low friction coefficient and good wear rate compared to oil only. Dispersed Cu-Ni alloy nanoparticles had superior friction reduction and antiwear properties compared to Cu nanoparticles, and these effects increased with the Ni content in the alloy. However, non-dispersed Cu-Ni alloy nanoparticles had poor antiwear properties. Dispersion-stabilized Cu-Ni alloy nanoparticles in oil enhanced the rolling effect of spherical nanoparticles between rubbing surfaces during friction processes. Cu-Ni alloy nanoparticles were produced using a pulsed-wire evaporation method in Ar gas. The synthesized Cu-Ni alloy nanoparticles had an average size of 150 nm, were spherical in shape and agglomerated. We investigated the tribological properties of dispersion-stabilized Cu-Ni alloy nanoparticles when used as a solid lubricant in oil at ambient temperature. The sedimentation behavior of Cu-Ni alloy nanoparticles in oil was examined using Turbiscan LAb. The particles were clearly quantified using delta backscattering profiles and peak thickness kinetics as functions of time. The rubbing surfaces were characterized after a friction test using scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). We found that dispersed Cu-Ni nanoparticles as a solid lubricant in oil had superior dispersion stability properties for over 48 h. Dispersed Cu nanoparticles in oil showed a low friction coefficient and good wear rate compared to oil only. Dispersed Cu-Ni alloy nanoparticles had superior friction reduction and antiwear properties compared to Cu nanoparticles, and these effects increased with the Ni content in the alloy. However, non-dispersed Cu-Ni alloy nanoparticles had poor antiwear properties. Dispersion-stabilized Cu-Ni alloy nanoparticles in oil enhanced the rolling effect of spherical nanoparticles between rubbing surfaces during friction processes.

데이터베이스 워크로드에서의 자원 식별

오정석,이상호,Oh Jeong-Seok,Lee Sang-Ho 한국정보처리학회 2006 정보처리학회논문지D Vol.13 No.2

Database workloads may show different resource usages for database applications. Database administrators can enhance the DBMS performances through resource management that reflects workload characteristics. We provide a method that can identify tunable resources from analyzing the relationship between performance indicators and resources. First, we select which performance indicators increase or decrease by expanding resources using a correlation coefficient and a significance level test. Next, we identify resources that can affect the DBMS Performances by using increasing or decreasing performance indicators. We evaluated our method in the TPC-C and TPC-W environments. 데이터베이스 응용분야에 따라 데이터베이스 워크로드는 서로 다른 자원 사용 형태를 보인다. 데이터베이스 관리자는 워크로드 특성을 반영하는 자원 관리를 통하여 시스템 성능을 향상시킬 수 있다. 본 논문은 성능지표와 자원간의 관계를 분석하여 데이터베이스 시스템 성능에 영향을 주는 자원을 선별하는 방법을 제시한다. 첫째, 본 방법은 피어슨 상관계수와 유의도 검정을 적용하여 데이터베이스 시스템 자원 확장에 대해 감소되거나 증가되는 성능지표를 선별한다. 둘째, 감소/증가 관계를 갖는 성능지표를 이용하여 데이터베이스 시스템에 성능에 영향을 주는 자원을 선별한다. 실험은 TPC-C 및 TPC-W 환경에서 본 방법을 수행하였으며, 제안된 자원 선별 방법에 대한 검증 시험을 수행하였다.

경찰 직무스트레스와 삶의 만족도

오정석 한국경찰복지연구학회 2013 경찰복지연구 Vol.1 No.1

경찰의 직무스트레스에 대한 선행 연구들은 직무불만, 이직, 음주, 질병, 우울증, 외상후스트레스장애,자살 등 부정적 결과를 중심으로 다루었다.본 연구에서는 긍정적 사고, 삶의 만족도라는 긍정적 변수를 통한 실증적 검증으로 경찰 직무스 트레스 관리의 새로운 페러다임을 제시하였다. 연구 결과 상관관계 분석에서는 직 무스트레스와 긍정적 사고,삶의 만족도는 부적 상관,긍정적 사고와 삶의 만족도 는 정적 상관을 보였다. 위계적 회귀분석에서는 직무스트레스는 삶의 만족도에 영 향을 미치지 못하였다. 그러나 긍정적 사고는 삶의 만족도에 높은 정적 영향을 미 치는 것으로 조사되었다. 결론적으로 긍정적 사고의 확장과 축적으로 직무스트레 스를 완화하고 삶의 만족도를 향상시킬 수 있음을 검증하였다. The previous studies on stress from police affairs have focused on negative results such as occupational dissatisfaction, job transfer, drinking, diseases, depression, traumas, and suicide. This study suggested a new paradigm to manage stress from police affairs based on a positive verification through positive variables such as satisfaction with life. Based on the results from a correlation analysis, stress from police affairs, positive ways of thinking, and satisfaction with life were negatively correlated while positive ways of thinking and satisfaction with life were positively related. Based on a hierarchical regression analysis, stress from police affairs did not influence satisfaction with life. However, positive ways of thinking had highly positive impacts on satisfaction with life. In conclusion, it was verified that expanded and accumulated positive ways of thinking could improve satisfaction with life while alleviating stress from occupational affairs.

Efficacy of breast augmentation using an external breast tissue expander for a shorter period while applying higher pressure: a preliminary study

오정석,김민서,오준석,허찬영 대한미용성형외과학회 2022 Archives of Aesthetic Plastic Surgery Vol.28 No.1

Background Various types of external breast tissue expanders have been found to be effective for aesthetic breast augmentation. However, their use has been limited when compared with implant-based breast augmentation due to the burdensome nature of their application. This article reports the possibility that external breast tissue expanders may be applied safely and effectively with higher pressure and shorter application time. Methods The participants comprised patients who desired breast augmentation using the EVERA-RAPHA device between January 2020 and March 2020. A double-blinded prospective study was conducted on two groups of eight patients each, with either 60 mmHg or 100 mmHg of pressure applied. Standardized photographs were taken and blinded measurements of volume and circumference were made. The Mann-Whitney and paired t-tests were conducted. Results Sixteen patients were evaluated after 1 month of treatment. The women in groups 1 and 2 (60 mmHg and 100 mmHg, respectively) used EVERA-RAPHA for 15.400± 0.704 and 15.300±0.477 minutes per day, respectively. The mean volume increases in groups 1 and 2 were 39.000±42.526 cc and 27.700±20.260 cc, respectively. No patients dropped out of the study. All patients reported that the device was tolerable. Mild bruising was found in 62.5% of the patients in group 2. Conclusions Breast augmentation using external tissue expanders can be a safe, effective, and practical option. Pressures of 60 mmHg or 100 mmHg can be safely applied for a shorter duration. Larger studies are needed to further confirm our findings.

A study on defining anatomical coordinate system of the ankle joint

오정석,구승범 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.4

An anatomical coordinate system between two bones is required to analyze the three-dimensional motion of a joint. The joint motion is expressed using the relative position and angle of this coordinate system. The absence of an internationally standardized method of defining the ankle joint's coordinate system makes a problem to compare the results of kinematic analysis of other studies. [Brown, J.A., et al.,2020] The purpose of this study is to propose a method of determining the anatomical coordinate system using the cylindrical shape of the joint surface and the anatomical landmarks and to shows the reliability and robustness of the method. The shape of the bones is expressed using a statistical shape and intensity model. The coordinate system was evaluated using talus, calcaneus, and tibia obtained from 28 subjects. The consistency was tested that the coordinate system between subjects had similar positions and directions and it was compared with the consistency of manually picked landmark-based coordinate system in the previous study [Koo, S. et al.,2015]. A method of determining the coordinate system independent of the operator is presented, and kinematic data of ankle joints can be impartially compared.

기상변화가 농산물가격에 미치는 영향 (7.27)

오정석,김권식 국제금융센터 2015 국제금융 Vol.2015 No.9

경찰공무원의 심리적 복지 증진 방안 연구

오정석 한국경찰복지연구학회 2014 경찰복지연구 Vol.2 No.1

경찰공무원의 심리적 복지 수준을 증진하기 위해 과거의 경제, 물질 중심 경찰 복지 개념에 대해 심리적 복지 개념을 새로운 페러다임으로 제시하고 Ryff의 심리 적 복지 척도인 자기수용감, 긍정적 대인관계, 자기주도성, 환경적응, 삶의 목표, 개인의 성장 등 6개의 하위 척도를 활용하여 다음과 같이 실천 중심 심리적 복지 척도를 재구성하였다. 자기수용감에 대응한 척도는 참선수련, 명상, 요가, 긍정적 대인관계에 대응한 척도는 동호회, 친목회, 친구관계, SNS 활동, 자기주도성에 대 응한 척도는 의사결정 경험, 환경적응에 대응한 척도는 스마트폰과 인터넷 활용도, 삶의 목표에 대응한 척도는 노후설계, 경제계획 및 실천 정도, 개인의 성장에 대응 한 척도는 연구 활동 실적이다. 이와 같은 실천 중심 심리적 복지 척도는 경찰공무 원의 심리적 복지 평가에 실천적, 동적 성향을 보다 잘 반영하고 심리적 복지 증진 대안 마련에 유익할 것으로 기대된다. In order to increase police welfare in terms of psychological well being, I proposed to implement a new psychological welfare concept into police welfare, thereby proposing a brand new paradigm. The proposal of new police welfare system based on psychological welfare is based on through analysis of Riff’s six specified measure of psychological welfare, them being self acceptance, positive relations with others, autonomy, environmental mastery, purpose in life, and personal growth. The specific components to help develop these six measures are: self acceptance - zen-meditation, meditation, yoga. positive relations with others – gatherings, friendly meetings, tight friendship, active social networking. autonomy – experience of decision making. environmental mastery – wise usage of smart phones and internet. purpose in life – retirement plan, making economic plan. personal growth – endless research. The above practice based psychological welfare measures deem to be a more realistic direction for police welfare due to the right implementation of the dynamic characteristics more suitable for real time police officers.