고객만족 및 재 이용사아와의 관계

최웅재,이남용 전주대학교 예술문화종합연구소 2012 예술문화 Vol.8 No.-

치과 임플랜트 보철에 있어 경사지대주의 경사각에 따른 응력의 유한요소법적 분석

최웅재,조인호 단국대학교 치의학연구소 1993 논문집 Vol.5 No.-

The purpose of this study was to evaluate and compare the stress distribution in the implant and bony tissue according to the different angulations of angulated abutment. Nine finite element models with different angulations (0˚, 5˚, 10˚, 15˚, 20˚, 25˚, 30˚, 35˚, 40˚) were designed. Two dimensional finite element analysis was used for this study. The results were as follows 1. All the tested angulated abutment demonstrated maximum stress value at the cervical portion of implant in the interface A and B. 2. Zero-degree angulated abutment showed less stress value than any others. 3. The Angulated abutments with 5 degree and 10 degree demonstrated higher stress concentration than that with zero degree in interface A and B. The abutments over 20 degree showed very high stress value at the opposite site of angulated cervical portion. 4. The augulated abutments over 30 degree showed very large stress distribution inside of implant fixture. 5. The agulated abutment with 15, 20 and 25 degree showed low stress value at the angulated cervical portion. But the stress increased in the angulated abutment over 30 degree. 6. The angulated abutment over 30 degree demonstrated severe stress concentration at the opposite site of angulated cervical portion. 7. From the view point of stress distribution, the use of abutments more than 30˚ angulation seem to be very disadvantageous.

인구 통계학적 특성에 따른 스포츠 이벤트 참가전,후 기업 이미지 차이

최웅재 한국스포츠리서치 2005 한국 스포츠 리서치 Vol.16 No.6

치과임프란트 보철에 있어 경사지대주의 경사각에 따른 응력의 유한요소법적 분석

최웅재,조인호 대한치과이식임플란트학회 1993 The Korean Academy of Implant Dentistry Vol.13 No.1

The purpose of this study was to evaluate and compare the stress distribution in the implant and bony tissue according to the different angulations of angulated abutment. Nine finite element models with different angulations(0°, 5°, 10°, 15°, 20°, 25°, 30°, 35°, 40°) were designed. Two dimensional finite element analysis was used for this study. The results were as follows 1. All the tested angulated abutment demonstrated maximum stress value at the cervical portion of implant in the interface A and B. 2. Zero-degree angulated abutment showed less stress value than any others. 3. The Angulated abutments with 5 degree and 10 degree demonstrated higher stress concentration than that with zero degree in interface A and B. The abutments over 20 degree showed very high stress value at the opposite site of angulated cervical portion. 4. The angulated abutments over 30 degree showed very large stress distribution inside of implant fixture. 5. The agulated abutment with 15, 20 and 25 degree showed low stress value at the angulated cervical portion. But the stress increased in the angulated abutment over 30 degree. 6. The angulated abutment over 30 degree demonstrated severe stress concentration at the opposite of angulated cervical portion. 7. From the view point of stress distribution, the use of abutments more than 30° angulation seem to be very disadvantageous

티타늄 임플란트의 표면처리가 골유착에 미치는 영향에 관한 조직형태계측학적 연구

최웅재,조인호,Choi, Woong-Jae,Cho, In-Ho 대한치과보철학회 2009 대한치과보철학회지 Vol.47 No.4

연구목적: 임플란트를 이용한 수복의 임상적인 성공에 중요한 역할을 하는 초기 골유착의 향상을 위해 티타늄의 표면 거칠기 조절과 함께 생체활성도를 가진 표면으로 변화시키는 방법에 관한 연구가 이루어지고 있다. 표면 거칠기의 적절한 증가는 조골세포의 활동을 증가시키고 골과 임플란트의 접촉과 유지를 촉진시킨다고 보고되고 있고 또한 알칼리와 열처리를 통하여 생체 활성 표면을 얻을 수 있는 것으로 보고되고 있다. 이에 본 연구에서는 알칼리 및 열을 이용한 티타늄 표면 처리가 골유착에 어떤 영향을 미치는지 알아보고자 하였다. 연구재료 및 방법: 기계절삭된 임플란트를 대조군으로 하여 (1군), 5 M NaOH 용액에 처리한 임플란트를 대기 중에서 열처리한 군 (2군)과 진공에서 열처리한 군 (3군)으로 분류하였다. 알칼리와 열처리를 시행한 임플란트들의 표면 특성을 관찰하고 가토에 식립하여 치유 기간에 따라서 조직학적 및 조직형태계측학적으로 비교하고 EPMA (Electron Probe Micro Analyzer)를 이용하여 치유 기간 별 골성분의 변화를 분석하였다. 결과 및 결론: 대기 중에서 열처리한 2군이 통계적으로 유의하게 (P<.05) 증가된 표면 거칠기를 보였다. 이렇게 만들어진 임플란트를 가토에 식립하여 조직 형태계측학적 분석을 시행한 결과 골-임플란트 접촉율은 전반적으로 치유기간이 경과하면서 증가하는 것으로 나타났으며 2군과 3군에서 통계적 분석결과 치유기간 간에 유의한 차이가 관찰되었고 (P<.05), 골-임플란트 면적율 (BA) 또한 골 임플란트 접촉율과 비슷한 양상을 보였으며 통계적 분석결과 2군에서만 치유기간별로 통계적으로 유의한 차이가 관찰되었다 (P<.05). 치유 기간별로 임플란트 주변 골에서 칼륨 (K), 인 (P), 칼슘 (Ca), 티타늄 (Ti)의 분포를 EPMA로 보았을 때 빈도의 편향은 관찰되지 않았으며 2군과 3군에서 초기에 칼슘과 인이 증가되는 것이 관찰되었다. 이상의 결과로 볼 때 알칼리 및 대기 중에서 열처리로 표면 처리된 임플란트의 사용은 초기에 안정된 골유착에 도움을 주며 임플란트 식립 후 기능까지의 시간을 감소시킬 것으로 사료된다. Statement of problem: Many studies have been conducted to improve the primary stability of implants by providing bioactive surfaces via surface treatments. Increase of surface roughness may increase osteoblast activity and promote stronger bonding between bone and implant surface and it has been reported that bioactive surface or titanium can be obtained through alkali and heat treatment. Purpose: The purpose of this study was to evaluate the stability of alkali and heat treated implants via histomorphometric analysis. Material and methods: Specimens were divided into three groups; group 1 was the control group with machined surface, the other groups were treated for 24 hours in 5 M NaOH solution and heat treated for 1 hour at $600^{\circ}C$ in the atmosphere (group 2) and vacuum (group 3) conditions respectively. Surface characteristics were analyzed and fixtures were implanted into rabbits. The specimens were histologically and histomorphometrically compared according to healing periods and change in bone composition were analyzed with EPMA (Electron Probe Micro Analyzer). Results: 1. Groups treated with alkali and heat showed increase of oxidization layer and Na ions. Groups 2 which was heat treated in atmosphere showed significant increase of surface roughness (P<.05). 2. Histomorphometric analysis showed significant increase in BIC (bone to implant contact) according to increase in healing period and there was significant increases in groups 2 and 3 (P<.05). 3. BA(bone area) ratio showed similar results as contact ratio, but according to statistical analysis there was significant increase according to increase in healing period in group 2 only (P<.05). 4. EPMA analysis revealed no difference in gradation of bone composition of K, P, Ca, Ti in surrounding bone of implants according to healing periods but groups 2 and 3 showed increase of Ca and P in the initial stages. Conclusion: From the results above, it can be considered that alkali and heat treated implants in the atmosphere have advantages in osseointegration in early stages and may decrease the time interval between implantation and functional adaptation.

골프지도자 서번트 리더십과 신뢰관계

최웅재,박찬희 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.6

This study aims to examine the relationship beetween golf leaders' servant leadership style and trust. The study used survey research methods to analyze a sample group of students of from the department of golf teaching. Results were analyzed using the SPSS statical sftware program Generally, the main statistics employed were frequency, average and simple correlationship. To analyze the hypothesis, the overall regression F-test, ANOVA and LSD analysis were used. In this contest, the findings are as follow: The regression analysis with regard to golf leaders' leadership style showed that it was highly related to servant "sympathy(r=.262)". The lowest variable presented were sympathy related to servant. Opinion could impact golf leader and player's place or circumstances under trust. Result show that opinions could impact golf leader and player's place or circumstances under trust. Most of players select human network(72.2%), including active communication, building trust, sympathy ,and friendly exchange between alumni.

합기도 참여와 스포츠 태도의 관계

최웅재 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.4

This paper studied the relationship between The Relationship Between Participated in Hapgido And Sport Attitudes of Children. To attain the goal of the study described above paragraphs, Children's Hapgido participants in Daejeon 2004. Then, using the stratified random Sampling methods, finally drew out 292 participants. The material collection device was the brochure named <The relationship between The Relationship Between Participated in Hapgido And Sport Attitudes of Children>, To analyze materials, the one-way "ANOVA" was used as statistic analysis techniques. The conclusion based on above study method and the result of material analysis are here blew. First, Children's Hapgido participation frequency is positive Sport Attitudes of Children. Second, Children's Hapgido participation density is positive Sport Attitudes of Children. Third, Children's Hapgido participation interval is positive Sport Attitudes of Children.

무게부하 증가가 동적 균형에 미치는 영향

최웅재,우병훈 한국응용과학기술학회 2023 한국응용과학기술학회지 Vol.40 No.4

본 연구의 목적은 Y-Balance Test(YBT)를 통하여 무게부하 증가가 동적 균형에 미치는 영향을 알아보고자 하였다. 연구의 대상자는 20-30대 남녀 성인 18명(연령: 23.17±1.72 years, 신장: 172.46 ±9.84 cm, 체중: 73.39±11.44 kg 다리길이: 88.89±5.69 cm)이 실험에 참여하였다. 동적 균형 측정을 위하여 YBT를 통하여 도달거리와 종합점수, COP 변인들을 측정하여 결과를 도출하였다. 연구결과로 YBT 시 후내측과 후외측 도달거리, 종합점수에서 무게부하일 때 동적 균형이 향상되었다. COP 결과로, 전방 도달 동안 전후진폭, 좌우 COP속도, COP 면적은 오른발에서 무게부하 시 동적 균형이 향상되었지만, 후내측 도달 동안 차이가 없었고, 후외측 도달 동안 좌우진폭은 왼발에서, 전후 COP속도는 왼발, 좌우 COP속도와 COP속도는 좌우발에서, COP 면적은 좌우발의 무게부하 시 동적 균형이 향상되었다.

우수골프 선수들의 부위별 등속성 근력의 요인분석

최웅재 한국학교체육학회 2002 한국학교 체육학회지 Vol.12 No.2

본 연구는 골프에 대한 전문적인 체력이 있다고 판단되는 골프선수 33명을 대상으로 기본체력 요인 중에서의 근력요인을 Cybex-6000등속성 장비를 이용하여 골프선수의 근력요인을 분석하였다. 근력요인 분석시 상지, 몸통, 하지의 3가지의 큰 부분으로 나누어서 총 14개의 항목을 측정하였고 이들 체력요인 측정결과를 토대로 요인분석 방법을 적용하여 요인구조를 분석하였다. 이 결과 얻어진 곁론은 골프 선수들에게 있어서 높은 부하를 보이는 근력요인은 각근져 60˚ /sec Extension Right(8.69%), Extension Left(8.52%), Flexion Right(6.71%), flexion Left(6.43%)로 나타났다. 그 다음으로 비중을 차지하는 요인은 어깨60˚ /sec Adduction Right(4.98%), Adduction Left(4.58%), 트렁크 30˚ /sec Extension(4.04%), 완력 60˚ /sec Flexion Left(3.37%)의 순으로 나타났다. 이러한 여러 가지의 결과로 볼 때에 모든 운동종목의 기본이 되는 근력요인은 골프 경기에서도 클럽의 제어 및 비거리, 방향성 등과 직결되는 중요한 요인이므로 선수들의 운동프로그램 작성시 위에서의 높은 부하요인이 나온 부분을 우선순위로 근력 운동프로그램을 작성하면 보다 효율적인 경기력이 나을 것으로 사료된다. This study analyzed the factors of muscular strength among those of basic fitness, based on the 33 pro golfers considered as having the professional physical strength for the golf utilizing Cybex-6000, the uniform velocity equipment. At the time of analyzing the factors of muscular strength, after dividing a body into the upper limbs, middle body, and the lower limbs as the parts, the 14 items of each part were approximately measured, and the structure of factors was analyzed applying the method of factor analysis based on the result of muscular strength measurement. The result showed that the factor of proving high loading rate with the golfers was leg strength 60˚ /ser Extension Right (8.69%), Extension Left (8.52%), Flexion Right (6.71%), and flexion Left (6.43%). As the second loading rate-factor, the result showed shoulder 60˚ /sec Adduction Right (4,98%), Adduction Left (4.58%), trunk 30˚ /sec Extension (4.04%), arm strength 60˚ /sec Flexion Left (3.37%) in hierarchy. Regarding these results, the muscular strength factors which are the basic elements for every sports entry are the gave factors that affect the control of club, distance, vector. So when making excercise programs for athletes, if the programs make advantage of the result found in this study, more efficient contesting ability.

골프 지도자 리더십이 신뢰에 미치는 영향

최웅재,장덕선,정지혜 한국체육과학회 2006 한국체육과학회지 Vol.15 No.2

The purpose of present study was to examine (1) coach's leader behavior type, (2) the relationship between the types of coach's leader behavior and trust in golf teams. Two hundred and eigheen-one athletes university golf teams from Seoul an Kyongee were selected, and questionnaires measuring transformational leadership(Bass, 1990), servant leadership(Spears, 1995), transactional leadership(Bass, 1990), and trust(Levering, 2000) were administered. An correlation analysis and stepwise multiple regression were used for statistical analyses. The conclusions from the findings are; (1) Coach's charisma behavior, interest behavior, stimulant behavior, inspiratiom behavior have a positive influence on the trust in golf athletes. (2) Coach's listening behavior, presentation of vision behavior,, sympathy behavior, athletes' growth behavior, healing hehavior, insight behavior, chamberlain chamberlain behavior, persuasion behavior, cognition behavior, teamwork behavior have a positive influence on the trust in golf athletes. (3) Coach's conpensation behavior and exceptionally management behavior a positive influence on the trust in golf athletes.