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신경가동기법이 뇌졸중 환자의 족관절 저측굴근 경직에 미치는 영향
이창렬,손길수,이수연,박지원,Lee, Chang-Ryeol,Son, Gil-Soo,Lee, Soo-Yeon,Park, Ji-Won 대한물리치료학회 2007 대한물리치료학회지 Vol.19 No.1
Purpose: We investigated how nerve mobilization influence ankle plantar flexor muscles of the affected lower extremity on the spasticity in stroke patients. Method: Total 12 patients were recruited, who had spasticity on ankle of the affected lower extremity, and applied nerve mobilization on the sciatic and tibial nerves in supine position. H-reflex was measured using EMG equipment, detected the ratio of maximum H/M and H-reflex latency, and compared the changes before, during, right after, 5 minutes after and 10 minutes after the application of nerve mobilization. The data were analyzed using repeated measure ANOVA to compare the changes in length of time. Results: In comparison with the ratio before nerve mobilization, the ratio of maximum H/M was significantly decreased during nerve mobilization(p<0.05), and it tended toward recovery right after, 5 minutes after and 10 minutes after applying nerve mobilization, there was no statistically significant difference(p>0.05). In comparison with the ratio before nerve mobilization, the ratio of maximum H/M was most significantly decreased during the first 10 seconds after nerve mobilization and it tended toward recovery gradually(p<0.05). In comparison with the H-reflex latency before nerve mobilization, it was significantly increased during nerve mobilization(p<0.05) and it was decreased right after nerve mobilization, After 5 and 10 minutes, it had a tendency toward recovery but it revealed no statistically significant difference (p>0.05). Conclusion: It is considered that nerve mobilization could contribute to initial rehabilitation with stroke patients for relieving spasticity and nerve contracture.
이창렬 한국진공학회 2015 Applied Science and Convergence Technology Vol.24 No.6
In this work, the electrical bistability of an organic CT complex is demonstrated and the possible switching mechanism is proposed. 2,9-Dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP) and tetracyanoquinodimethane (TCNQ) are used as an organic donor and acceptor, respectively, and poly-methamethylacrylate (PMMA) is used as a polymeric matrix for spin-coating. A device with the Al/(Al2O3)/PMMA:BCP:TCNQ[1:1:0.5 wt%]/Al configuration demonstrated bistable and switching characteristics similar to Ovshinsky switching with a low threshold voltage and a high ON/OFF ratio. An analysis of the current-voltage curves of the device suggested that electrical switching took place due to the charge transfer mechanism.
Polymer based blue electrophosphorescent light emitting devices
이창렬,Rupasree Ragini Das,김장주 한국물리학회 2005 Current Applied Physics Vol.5 No.4
A series of bis-orthometalated monocyano Ir(III) complexes, [Ir(ppy)2PX3CN], (X¼ Oph, Ph and n-bu) were synthesized and theinuence of the steric and electronic eects of the phosphine ligand on the photophysical and electrochemical properties of com-plexes were studied. These cyano phosphine complexes emit light from an admixture of triplet metal-to-ligand charge-transfer(3MLCT) and ligand centered (LC) states in the region of 455498 nm with a vibronic progression. The trends of the photophysicaland electrochemical properties of metal complexes in the series were well understood by the electronic parameter of the phosphineligands. Polymer light emitting devices were fabricated by doping Ir(ppy)2P(n-bu)3CN in the PVK host and the device performanceswere investigated. The maximum external quantum eciencyðgexÞwas 1.45% for a 10wt% Ir(ppy)2P(n-bu)3CN doped PVK device.A power eciency of 0.99 lm/W at 230 cd/m2 and 6 mA/cm2 was obtained. The corresponding chloro complexes of the generalformula [Ir(ppy)2PX3Cl] were also synthesized and the optical and device properties were compared with the cyano complexes..