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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.
후방 요추체간유합 재건술 후 저항운동이 남성 요통환자들의 요부근력 및 통증변화에 미치는 영향
김건도(Kim, Gun-Do),한길수(Han Gil-Soo) 한국체육과학회 2023 한국체육과학회지 Vol.32 No.6
The purpose of this study is to measure and analyze changes in lumbar muscle strength and pain index after applying other exercise methods for male patients who underwent Posterior lumbar interbody fusion(PLIF) into a resistance exercise group with 10 participants and a self-exercise group with 7 participants. The results are described below. After the application of exercise, the lumbar muscle strength increased by 43.42% in the resistance exercise group (p<.001) at the average value of 7 angles, and the strength increase in the self-exercise group also showed a increase by 27.88%(p<.05). Pain decreased by 36.73% in the resistance exercise group and showed a statistically significant difference (p<.001). It decreased by 22.91% in the self-exercise group and did not show a statistically significant difference. The above results showed that application of resistance exercise and stabilization exercise as a method of improving low back pain after posterior lumbar inter body fusion reconstruction in male increased lumbar extensor strength and resistance exercise had a positive effect on the significant pain reduction.
디지털 가상생산 기술 적용 전략 수립을 위한 자동차 업무 분석
김건연(Gun Yeon Kim),윤태혁(Tae Hyuk Yoon),노상도(Sang Do Noh) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.11_3
Digital virtual manufacturing is a technology facilitating effective development and agile manufacturing of products via sophisticated computer models representing physical and logical schema and behavior of real manufacturing systems including products, process, and manufacturing resources. Based on these models, digital virtual manufacturing supports decision making and error checking in the entire manufacturing processes from design to mass production. In this paper, we analyzed entire business process of the tour major production shops such as press. body assembly, painting and general assembly, of a Korean automotive company by IDEF methodology. And then we generated a strategic plan for the systematic application of the virtual manufacturing technologies. We identified many activities in business process, that can be improved by the application of virtual manufacturing technologies.
근막이완 마사지요법이 남자 대학생들의 스트레스, 심장건강도 및 신체활력도 변화에 미치는 영향
김건도(Kim, Gun-Do),한길수(Han Gil-Soo) 한국체육과학회 2023 한국체육과학회지 Vol.32 No.6
The purpose of this study is to measure and analyze changes in stress, hrv-index and physical vitality for male college students at a college by dividing the participants into an experiment group with 14 participants who applied myofascial release massage for 8 weeks and a control group with 12 participants who did not receive the experimental treatment. The results are described below. Stress showed an increase by 17.74% a fter 8 week s of myofascial r elease massage t reatment, and it decreased by 4.38% in the control group, but there was no statistical significance in both groups. HRV-index increase by 8.11% in the experimental group with myofascial release massage and by 1.13% in the control group, but there was no statistical significance in both groups. Physical vitality showed an increase by 2.29% after 8 weeks of myofascial release massage treatment, and it decreased by 2.21% in the control group, but there was no statistical significance in both groups. The above results showed that when the myofascial release massage therapy was applied, the stress of male college students and the degree of HRV-index and physical vitality were increased which had a positive effect.