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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.
팀 혁신활동을 위한 지식공유 활동 영향요인에 관한 연구
박준기(Jungi Park),이혜정(Hyejung Lee),이정우(Jungwoo Lee) 한국IT서비스학회 2013 한국IT서비스학회지 Vol.12 No.3
Innovation becomes norm rather than exception in today's business, and accordingly firms are working on how to make their employees to work smarter using information systems and technologies. Smart work demands virtual collaboration and cooperation among team members in different places and different time. Sharing of knowledge among team members in these innovative activities are critical in every sense for the successful performance. This study explores the antecedents of knowledge sharing among team members in team-based innovation activities. Five factors (pleasure of knowledge sharing, self-efficacy, management support, rewards, and system usage) are identified through extant review of literature and an instrument is adopted and validated from previous studies. The instrument is adminitered against 138 individuals in and across 54 teams in a telecommunication firm. Except self efficacy, all the paths in the proposed research model is confirmed with different levels of relational coefficients towards the levels of knowledge sharing and innovation activities in teams. Surprisingly, findings indicate that intrinsic pleasure of sharing is most critical than management support, organizational rewards or system usage. This study fills the research gap in team management. Findings provide important implications for managing teams in coming virtual and smart environment.
IT서비스에 있어서 서비스 품질이 지식공유의도에 미치는 영향에 관한 연구
박준기 ( Jun Gi Park ),윤정인 ( Jun Gin Yoon ),이정우 ( Jung Woo Lee ) 한국정보시스템학회 2010 情報시스템硏究 Vol.19 No.3
IT service is increasing becoming a critical resource firms have to utilize effectively and efficiently. As the importance of IT service increases, the knowledge sharing between IT service people and users becomes more and more important. In this study, the IT service quality is posited as a critical independent construct that influences knowledge sharing attitude of users which in turn change the knowledge sharing intention. Service satisfaction is placed as a mediator between the quality and attitude to compare direct and indirect effect in the model. Results show that (1) IT service quality influences the knowledge sharing attitude of users directly, and indirectly through service satisfaction, (2) at the same time, however, the direct path from quality to attitude is found to be stronger than the indirect path through satisfaction, and (3) interestingly, satisfaction seems to have no direct effect on intention, but only through the attitude change as can be inferred from the theory of reasoned action. Outcome of this study implies the importance of IT service quality in improving the knowledge sharing activities between users and developers, and interestingly the aim of quality would not be targeted on satisfaction but on attitudinal changes.
걷기 운동과 웨이트 트레이닝이 비만 여대생의 신체구성성분과 혈중지질에 미치는 영향
박준기(Park Joon-Ki) 한국체육과학회 2002 한국체육과학회지 Vol.11 No.2
The purpose of this study was investigate the body composition and blood lipid of female obese freshman during 16week's walking exercise and weight training.. The subject were divided control group(14), walking group (16) and weight group(15) total 45 female freshman. The obtained conclusion were as follows; 1. walking group is more effective than W-T group in reduction of body weight, and % body fat. 2. walking group is more effective than W-T group in TC, TG and LDL-C. 3. walking group is more than W-T group in HDL-C. In conclusions, female freshman in need to prevention the hyperkinetic diseases and to reduction of body weight and % body fat.