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김건인,정동윤,박송구,이규섭,Kim Gun-In,Chung Dong-Yun,Park Song-Gu,Lee Gyu-Seop 한국군사과학기술학회 2004 한국군사과학기술학회지 Vol.7 No.2
The erosion wear of gun barrel occurs due to heat and chemical reactions. The high pressure and temperature in chamber increase the erosion wear. It is known that the metal phase transfer is the primary wear factor in a gun barrel under high temperature. In this paper, the tool of wear prediction in high pressure gun tube has been developed. The program developed has three modules such as DIRECT(interior ballistics analysis module), INVERSE(gun design module), and WEAR(wear prediction module). The prediction of wear was compared with the experimental data which was collected in the field unit. The prediction results shows good trend with the collected data.
Gyrotonic운동과 Sling운동이 중년여성 요통환자들의 요부 근력, 안정화 비율 및 통증지수 변화에 미치는 영향
김건도(Kim, Gun-Do),한길수(Han, Gil-Soo) 한국체육과학회 2019 한국체육과학회지 Vol.28 No.5
The purpose of this study is to measure and analyze lumbar extension strength, flexion/extension ratios and visual analogue scale(VAS) changes in 20 middle-aged Female Patients of low back pain. Subjects(10 from the gyrotonic exercise group, 10 from the sling exercise group) participated and tested twice pre- & post- exercise during the 8-week period of different exercise programs. The result of research showed as following. 1. The gyrotonic exercise group and the sling exercise group showed an increase in lumbar extension strength to 41.18% and 33.58% respectively. Both groups showed a significant increase of muscular strength at all angles except “0° in the sling exercise group. 2. The flexion/extension strength ratio in the gyrotonic exercise group decreased to 47.88% and a statistically significant difference was found(p<.01), but it increased to 16.15% in the sling exercise group and statistical significance was not found. 3. The gyrotonic exercise group and the sling exercise group showed a decrease in VAS to 39.58% and 21.42% respectively and there was a statistically significant difference(p<.01). These results indicated that gyrotonic exercise and sling exercise need to be recommended clinically as interventions for improving low back pain.
고압산소요법 병행 저항운동과 슬링운동이 여성 요통 환자들의 요부근력, 통증 및 근활성도 변화에 미치는 영향
김건도(Kim, Gun-Do),한길수(Han, Gil-Soo) 한국체육과학회 2018 한국체육과학회지 Vol.27 No.5
The purpose of this study was to investigate the effects of the resistance exercises combined with oxygen therapy and with sling exercise on the lumbar extension strength, pain and muscle activity in female patients with back pain. By a ssigning 21 patients to HOTMEG(n=11) or SMEG(n=10) groups. 1. The lumbar extension strength increased significantly in both group for 0°, 12°, 24°, 36°, 48°, 60°, and 72° degrees(p<.001). 2. The pain decreased 53.58 and 23.72% in HOTMEG and SMEG groups, respectively, showing significant difference between two groups(p<.001). 3. The muscle activity increased in both group without statistical significance although there were significant change in Rt. min and max frequencies(p<.001, p<.05). These Results showed that the HOTMEG and SMEG are efficient in increasing lumbar extension strength and muscle activity and decreasing pain in middle-aged female women and that they have potential effects to be presented as an intervention for pain improvement.
고압산소요법을 병행한 저항운동이 중년여성 요통환자들의 요부근력, 굴신비율 및 통증변화에 미치는 영향
김건도(Kim, Gun-Do),한길수(Han, Gil-Soo),정영호(Jung, Yeong-Ho) 한국체육과학회 2017 한국체육과학회지 Vol.26 No.5
This study is aimed to determine the effects of lumbar extension strength, ratio of lumbar flexion/extension and Visual Analogue Scale(VAS) after conducting different exercises for 8 weeks in 20 middle-aged female patients of low back pain(10 patients in a resistance exercise group with hyperbaric oxygen therapy, and 10 patients in a resistance exercise group). Both group were trained twice per weeks for 8 weeks and measured on MedX machine for lumbar extension strength at 7 difference angles including Visual Analogue Scale(VAS) and flexion/extension strength ratio. Results showed the following 1. Both groups indicated a significant increase in lumbar extension strength(p<.001) at 0°, 12°, 24°, 36°, 48°, 60°, and 72° degrees. 2. A resistance exercise group with hyperbaric oxygen therapy was decreased by 42.34%, and a resistance exercise group was decreased by 34.64% in the flexion/extension strength ratio, which presented a significant difference(p<.001). 3. A resistance exercise group with hyperbaric oxygen therapy indicated 52.38% decrease and a resistance exercise group indicated 46.75% decrease in VAS, which presented a significant difference(p<.001). Therefore, a resistance exercise with hyperbaric oxygen therapy was effective in reducing the flexion/extension strength ratio and pains for low back pain patients and it should be proposed as one of a recommendable training program for LBP patients.
BPR 방법론 기반 중소 PCB 제조 기업의 맞춤형 제조실행시스템 구축
김건연(Gun Yeon Kim),이언(Eon Lee),김종환(Jong Hwan Kim),강형석(Hyung Suk Kang),노상도(Sang Do Noh),이재광(Jae Kwang Lee),최상수(Sang Su Choi),조용주(Jong Ju Cho),최석우(Seog Ou Choi) (사)한국CDE학회 2010 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2010 No.1
Manufacturing enterprises have been doing their best endeavors to obtain global competitiveness using various methodologies, such as IT technology. In order to achieve global competitiveness, they are adopting Manufacturing Execution System (MES) for competitive production. MES is a total management system that manages from the beginning of the production by product order until the quality inspection of the finished product. And MES is an inter-mediator for supplementation of information gap between ERP and inspection machine and equipment. This paper describes on establishment of effective strategy based on BPR methodology and implementation of MES small and medium PCB manufacturing company with multiple-types of products and mixed process flows.
만성요통환자의 회전복합운동과 신전운동이 집단 간 요부 근기능 변화와 안정화에 미치는 영향
김건도(Kim Gun-Do),한길수(Han Gil-Soo) 한국체육과학회 2009 한국체육과학회지 Vol.18 No.4
The purpose of this study was aimed at determining the effects of resistance training on lumbar extension strength, torso rotation torque and ratio of lumbar flexion with chronic low back pain patients. Twenty-eight male (LE&TR:13, LE:15) and thirty-nine female (LE&TR:13, LE:26) subjects participated and was trained twice per week for eight weeks with protocol of Medx extension and Torso Rotation exercise. Both groups were tested on Medx machine for lumbar extension strength at baseline and after 8weeks. Two-way ANOVA with repeated measures on a group, angle, time was utilized to analysis differences in strength. Results showed a significant improvement of lumber extension strength for LE&TR:41.43%, LE:69.73% in male group and for LE&TR:56.54%, LE:60.97% in female group after 8 weeks training. Both group in female indicated similar improvement of strength at all degrees but LE group in male showed high increase(%) of strength. Result further on the ratio of lumbar flexion 72° and 0° indicated decrease(%) of RE&TR:27.46%, LE:24.07% in male group and decrease(%) of LR&TR:28.63%, LE:34.10% in female group.