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임선,강유진,임성훈,정명은,이종인,고영진,김혜원 대한재활의학회 2009 Annals of Rehabilitation Medicine Vol.33 No.2
Objective: To measure the foot force and contact area distribution between the paretic and nonparetic sides during static and dynamic weight-bearing states, and to determine their relationship with BMD (bone mineral density). Method: Sixteen stroke patients (mean age=63.5±7.46 years) were included and BMDs of bilateral femurs were evaluated. Foot force and total foot contact areas were measured using the F-scan insole system. All values were expressed in ratio of paretic versus nonparetic sides. Results: The paretic side showed significantly smaller values in BMD, foot force and total contact area than the nonparetic sides (p<0.05). Femoral BMD ratio correlated significantly with dynamic weight bearing force ratio (r=0.58, p<0.05) and time elapsed since stroke as well (r=−0.17, p<0.05), while it did not correlate with either static weight-bearing force ratio (r=0.25, p>0.05), or total contact area ratio during both dynamic and static weight-bearing state (r=0.23, r=0.12, p>0.05). Multiple regression analysis showed that dynamic weight-bearing force ratio and time elapsed since stroke were independently related to BMD ratio (t=3.25, p<0.001 and t=−4.89, p<0.001). Conclusion: The present study showed that foot force differences in the dynamic weight- bearing state significantly correlated to post-stroke BMD while foot contact area in both the static and dynamic weight-bearing state did not correlate to post-stroke BMD. Objective: To measure the foot force and contact area distribution between the paretic and nonparetic sides during static and dynamic weight-bearing states, and to determine their relationship with BMD (bone mineral density). Method: Sixteen stroke patients (mean age=63.5±7.46 years) were included and BMDs of bilateral femurs were evaluated. Foot force and total foot contact areas were measured using the F-scan insole system. All values were expressed in ratio of paretic versus nonparetic sides. Results: The paretic side showed significantly smaller values in BMD, foot force and total contact area than the nonparetic sides (p<0.05). Femoral BMD ratio correlated significantly with dynamic weight bearing force ratio (r=0.58, p<0.05) and time elapsed since stroke as well (r=−0.17, p<0.05), while it did not correlate with either static weight-bearing force ratio (r=0.25, p>0.05), or total contact area ratio during both dynamic and static weight-bearing state (r=0.23, r=0.12, p>0.05). Multiple regression analysis showed that dynamic weight-bearing force ratio and time elapsed since stroke were independently related to BMD ratio (t=3.25, p<0.001 and t=−4.89, p<0.001). Conclusion: The present study showed that foot force differences in the dynamic weight- bearing state significantly correlated to post-stroke BMD while foot contact area in both the static and dynamic weight-bearing state did not correlate to post-stroke BMD.
임선,임성훈,이종인,고영진,박주현,홍보영,박근영 대한의학회 2010 Journal of Korean medical science Vol.25 No.6
We evaluated the efficacy of oral alendronate with different dosing regimens for nonnociceptive symptoms and osteoporosis in a sciatic nerve chronic constriction injury (CCI) model. Male Sprague-Dawley rats (n=60) were subdivided into sham control (SC) group and CCI groups, which were divided according to dosage and time of oral alendronate administration: no treatment (NT), low dosage early (LE), high dosage early (HE), low dosage late (LL) and high dosage late (HL). We measured the thickness and temperature of the hind paw, bone mineral density (BMD) of the tibia, along with tibia bone strength. On the 14th day post-CCI, the HE group showed significant reduction in thickness and temperature (P<0.001). On the 42nd day post-CCI, the HE group showed significant reduction in temperature compared to the NT group (P<0.001). Also, both HE and HL groups showed statistically significant increased tibia BMD (P<0.001), along with increase of tibia bone strength compared to the NT group. Based on these findings, early alendronate in high dosages is effective in the non-nociceptive symptoms; early and late alendronate in high dosages,are effective in preventing bone dystrophic changes in a CCI model.
산업용 필드버스 기반의 안전 펜스 시스템 개발 및 성능 평가
임선,이승용 대한임베디드공학회 2019 대한임베디드공학회논문지 Vol.14 No.1
Recently, the importance of industrial fieldbus has been highlighted since the emergence of Industry 4.0. In particular, the Ethernet-based fieldbus protocol is actively used in automation systems. This paper proposes a safety fence system based on EtherCAT, a type of Ethernet-based fieldbus, to measure external loads. In order to measure the external loads, a force sensor was connected to an EtherCAT slave that transmits the sensor data to an EtherCAT master in real-time. The master ultimately controls the angle of the safety fence when it detects danger based on the given data. In the future, more effiecient safety fence system will be developed by using a HMI system to communicate with the EtherCAT master to manage safety and by employing multiple sensors to increase the accuracy of the fence system.