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박준기,김선영,김태윤,최계숙,염두석,강동윤,최승오,박지연,Park, June-Ki,Kim, Sun-Young,Kim, Tae-Yoon,Choi, Kye-Sook,Yeom, Doo-Suk,Kang, Dong-Yoon,Choi, Seung-O,Park, Ji-Youn Korean Society for Radiation Therapy 2008 대한방사선치료학회지 Vol.20 No.1
Purpose: To monitor the changes of location of prostate gland using DIPS and to examine the adjustment and proton beam therapy depending on the movement of prostate gland in proton beam therapy for prostate gland in which a fiducial gold marker was inserted. Materials and Methods: This study was conducted in ten patients with prostate cancer who received proton beam therapy since April of 2008. To monitor the change of prostate location, three fiducial gold markers were inserted prior to the treatment. To minimize the movement of prostate gland, patients were recommended to urinate prior to the treatment, to intake a certain amount of water and to concomitantly undergo rectal balloon. In these patients, the set-up position was identical to that for a CT-simulation. The PA (posterior-anterior) and lateral images were obtained using both DIPS (digital image positioning system) and a plain radiography, and they were compared between the two imaging modalities. Thus, the changes of the location of fiducial gold marker were assessed based on three coordinates (x, y, z) and then adjusted. This was followed by proton beam therapy. Results: Images which were taken using a plain radiography were compared with those which were taken using DIPS. In ten patients, according to a reference bony marker, the mean changes of the location of fiducial gold marker based on an iso-center were X-axis: $\pm$0.116 cm, Y-axis: $\pm$0.19 cm and Z-axis: $\pm$0.176 cm. These ten patients showed a difference in the changes of location of prostate gland and it ranged between RT: 0.04 cm and RT: 0.24 cm on the X-axis; between Inf: 0.03 cm and Sup: 0.42 cm on the Y-axis; and Post: 0.05 cm and Ant: 0.35 cm on the Z-axis. Conclusion: To minimize the movement of prostate gland, as the pre-treatment prior to the treatment. In all the patients, however, three fiducial gold markers showed a daily variation which were inserted in the prostate gland. Based on the above data, Thus, the requirement of gold marker matching system depending on the daily variation in the proton beam therapy for which more accurate establishment of target was confirmed. It is assumed that an accurate effect of proton beam therapy would be enhanced by adjusting the target-center depending on the location change of prostate gland using DIPS which was used in the current study.
20 주간의 신체운동이 노인들의 신체구성 성분과 체력에 미치는 영향
박준기(Joon Ki Park) 한국사회체육학회 2001 한국사회체육학회지 Vol.16 No.-
The purpose of this study was to investigate the effects of 20 weeks exercise in 60-70 years old women. The subject were participated 78 old women who have not any routine exercise in 10 years more and exercise was 50-60mjn./day, 5 days/week, 50-60% HR max intensity. The obtained results were as follows; 1. Body weight, % body fat, BMI and circumference of thigh had no significant difference. 2. Systolic BP was significant difference(p<.05), diastolic BP was no significant difference. 3. Grip strength and leg strength were no significant difference. 4. Balance and stick reaction time were significant difference(p<.05). In conclusion, 20 weeks exercise program were prevention of injury and health management of old women as a decreased systolic BP and enhanced balance and agility.
창업기업의 일과 삶의 균형 효과 : 조직 자부심과 업무 만족
박준기(Jun-Gi Park),심재섭(Jae-Sub Shim) 강원대학교 경영경제연구소 2019 Asia-Pacific Journal of Business Vol.10 No.3
It is important for the Startup team to enhance their employee s work & life balance in recent ages. this study is to research the effect of work & life balance on organizational pride, job satisfaction and performance. Also, we explore how the organizational climate which compose with autonomy, leader s support and trust affects work & life balance. This study analyzed the path effect with PLS method using data from 151 Startup teams. The results of analysis are as follows. First, it was confirmed that supervisor s support, trust of team climate positively influence work & life balance but autonomy is not confirmed to have the relationship with work & life balance. Second, work & life balance have a positive effect on organizational pride and job satisfaction. In addition, this study shows that organizational pride and job satisfaction have the relationship between work & life balance and team performance. Also, Startup team managing the work & life balance will get better performance and retain the competition.
탄소와 질소 함량에 따른 탄질소 복합첨가강의 내마열 특성 변화
박준기(J. K. Park),이슬기(S. K. Yi),김성준(S.-J. Kim),김용석(Y.-S. Kim) 한국소성가공학회 2009 한국소성가공학회 학술대회 논문집 Vol.2009 No.5
Dry-sliding-wear behavior of Fe-18Cr-10Mn steel with various carbon and nitrogen contents was characterized, and the effect of carbon and nitrogen contents on the wear was investigated. Dry sliding wear tests of the steel were carried out at room temperature against an AISI 52100 bearing steel ball using a pin-on-disk wear tester. Applied wear loads were varied from 10 N to 100 N, and the sliding distance was fixed as 720 m. Worn surfaces and the wear debris of the steel were examined using an SEM to find out the wear mechanism. It was found that the Fe-18Cr-10Mn with both carbon and nitrogen exhibited superior wear resistance to the steel with only nitrogen. The wear resistance of the Fe-18Cr-10,m-xC-yN alloy was explained by the increased strain-hardening capability with the interstitial atoms.
협동조합 이사회의 책임과 역할 -미국 농협 사례를 중심으로-
박준기 ( Joonkee Park ) 한국협동조합학회 2010 韓國協同組合硏究 Vol.28 No.2
This article, at first, discussed the theory of corporate governance and the special features of the cooperatives`` management and governance. Second, it discussed the size of boards of directors, methods cooperatives use to select and nominate board candidates and examined election and member voting policies in agricultural cooperatives in U.S. Third, this article identified seven basic responsibilities imposed on every cooperative board of directors and the legal standards that directors must meet and can protect themselves as well as the cooperative. Finally, This article suggested some implications to improve the capabilities of agricultural cooperatives`` board of directors and research issues.