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저주파 전기자극에 따른 혈압 특성과 홀효과센서를 이용한 맥진파형 특성에 관한 연구
강병욱(Byeong-Uk Kang),이상석(Sang-Suk Lee) 한국자기학회 2019 韓國磁氣學會誌 Vol.29 No.5
The characteristics of the measured 80 data during 7 months for the systolic blood pressure (SBP), diastolic blood pressure (DBP), heart rate (HR), and the systolic time (S.time) were investigated according to the conditions of the low frequency acupuncture electrical stimulator(AES). The S.time of the radial artery pulse wave was measured by a clip-type pulsimter equipped with a permanent magnet and a Hall effect sensor. The mean SBP, DBP, and HR decreased by 5.7 mmHg, 2.1 mmHg and 1.4 /min at 124.1 mmHg, 66.4 mmHg and 87 /min, respectively, after the low frequency treatment by AES. The S.time was 108.6 ms having an increase of 2.6 ms after electrical stimulation at 30 Hz rather than 8 Hz and 15 Hz. The low frequency electrical stimulation was found to effectively stabilize the blood pressure and increase the blood flow in the human body.
Kang, Dong Jun,Han, Dong Hee,Kang, Dong Pil,Yoo, Jae Won,Kim, Byeong Uk The Optical Society 2008 Optics express Vol.16 No.22
<P>Organic-inorganic nanohybrid materials were successfully fabricated from organically modified colloidal-silica nanoparticles synthesized through the sol-gel process and using the modified acryl resin. The materials exhibited the simple solution-processible film formation and high transmittance of above 90% in the visible wavelength regions. The materials were used for the fabrication of various patterns using the photolithography. We could simply fabricate the photopatterns and easily control the surface structures by changing the content of organically modified colloidal-silica nanoparticles. Also, the thermal and mechanical properties of the formed nanohybrid films could be efficiently enhanced through the synergistic combination of organically modified colloidal-silica nanoparticles with the modified acryl resin.</P>
( Byeong-gon Na ),( Gil-chun Park ),( Min-jae Kim ),( Sang-hoon Kim ),( Yong-kyu Chung ),( Sang-hyun Kang ),( I-ji Jeong ),( Jin-uk Choi ),( Hwui-dong Cho ),( Young-in Yoon ),( Shin Hwang ),( Ki-hun K 대한간학회 2020 춘·추계 학술대회 (KASL) Vol.2020 No.1
Aims: When the donor’s left lobe volume is <30%, donor selection for the right posterior section graft (RPSG) is based on the type III portal vein (PV) anatomical variation. Herein, we validated the selection of a donor with a type III PV variation for RPSG to prevent biliary complications (BCs) after single-graft (SG) and dual-graft (DG) living-donor liver transplantation (LDLT). Methods: The clinical data of recipients and donors with a type III PV variation for LDLT using an RPSG performed between January 2004 and June 2018 were retrospectively collected and analyzed to determine the occurrence of BCs. Results: The 26 LDLTs performed using an RPSG, including 20 DG LDLT cases, accounted for 0.6% of all LDLT cases (n=4,292). BCs developed in 6 recipients (23.0%), including biliary stricture in 4 (15.3%) and bile leakage in 2 (7.6%). No vascular complications occurred. The RPSG volume was significantly smaller in recipients with BCs than in those without BCs (400.8±79.9 vs. 504.1±96.5 ml, P=0.015). The bile duct types were A, B, C1, C2, and D in 6 (18.8%), 5 (15.6%), 3 (9.4%), 13 (40.6%), and 5 patients (15.6%), respectively. All the RPSGs had a single-orifice bile duct. The bile duct size of the RPSG was relatively smaller in recipients with BCs than in those without BCs (2.8±1.0 vs. 3.6±1.4 mm, P=0.237). Conclusions: When using an RPSG for SG and DG LDLTs, the selection of a donor with a type III PV variation can be feasible to prevent BCs.
( Byeong-gon Na ),( Dong-hwan Jung ),( Yong-kyu Chung ),( Sang-Hyun Kang ),( I-ji Jeong ),( Jin-uk Choi ),( Min-jae Kim ),( Sang-hoon Kim ),( Hwui-dong Cho ),( Young-in Yoon ),( Shin Hwang ),( Ki-hun 대한간학회 2020 춘·추계 학술대회 (KASL) Vol.2020 No.1
Aims: Living donor hepatectomy (LDH) is performed widely as a part of living donor liver transplantation. The type and length of incision have been considered important because of the quality of life, such as the cosmetic effect. We describe herein the minimal incision for LDH to evaluate the safety and feasibility. Methods: We enrolled 63 consecutive cases of donor hepatectomy using a subcostal or upper midline minimal (9-12cm) incision depending on graft type and size between Jul and Dec in 2019 at a single center. Donor demographics, preoperative data, and postoperative outcomes were analyzed. Results: The mean age of the donors was 32.8 ± 10.3 yrs, and 32 (50.8%) donors were male. The mean operation time was 400.5 ± 69.5 minutes and the mean hospital stay was 9.4 ± 3.7 days. The graft types comprised 52 (82.5%) of the modified right lobe, 6 (9.5%) of the modified extended right lobe, and 5 (7.9%) of the extended left lobe. The portal vein types were I, II, and III in 59 (93.7%), 1 (1.6%), and 3 (4.8%), respectively. The bile duct types were A, B, C1, and C2 in 46 (73.0%), 8 (12.7%), 3 (4.8%), and 6 (9.5%). There were one (0.02%) case of bile leakage, and one (0.02%) case of abdominal wall bleeding postoperatively. Conclusions: LDH using minimal incision was a safe and feasible option showing an acceptable incidence of complications despite anatomical variations.
Association between supervisors’ behavior and wage workers’ job stress in Korea
Shin Uk Kang,Byeong Jin Ye,ByoungGwon Kim,Jung Il Kim,Jung Woo Kim 대한직업환경의학회 2017 대한직업환경의학회지 Vol.29 No.-
Background: In modern society, many workers are stressed. Supervisors’ support or behavior can affect the emotional or psychological part of the worker. The purpose of this study is to investigate the effect of supervisor’s behavior on worker’s stress. Methods: The study included 19,272 subjects following the assignment of weighted values to workers other than soldiers using data from the Fourth Korean Working Condition Survey. Supervisors’ behavior was measured using 5 items: “supervisor feedback regarding work,” “respectful attitude,” “good conflict-resolution ability,” “good work-related planning and organizational ability,” and the encouragement of participation in important decision making. Job stress was measured using 1 item: “I experience stress at work.” Multiple logistic regression analysis was performed to examine the effects of supervisors’ behavioral, general, occupational, and psychosocial characteristics on job stress in workers. Organizational characteristics associated with supervisors’ behavior were also analyzed. Results: The results showed that supervisors’ provision of feedback regarding work increased workers’ job stress (OR = 1.329, 95% CI = 1.203 ~ 1.468). When a supervisor respect workers (OR = 0.812, 95% CI = 0. 722 ~ 0.913) or good at planning and organizing works (OR = 0.816, 95% CI: 0.732 ~ 0.910), workers’ job stress decreased. In particular, the two types of supervisor behaviors, other than feedback regarding work, were high in private-sector organizations employing less than 300 employees. Conclusion: Supervisors’ behavior influenced job stress levels in workers. Therefore, it is necessary to increase education regarding the effects of supervisors’ behavior on job stress, which should initially be provided in private-sector organizations with up to 300 employees.
Kim, Byeong-Soo,Lim, Kang-Uk,Baek, In-Seon,Kim, Min-Kyoung,Kang, Hye-Min,Nam, Gi-Jeong,Lee, Myung-Mo korean Academy of Physical Therapy Rehabilitation 2019 Physical therapy rehabilitation science Vol.8 No.1
Objective: The aim of this study is to investigate the effects of whole body vibratory stimulation on muscle strength, balance, and fall efficacy among super-aged women. Design: Randomized controlled trial. Methods: Twenty-eight super-aged women over 80 years of age were assigned to either the experimental group (n=14) and control group (n=14). The experimental group received an exercise program that used the whole body vibratory stimulation with a frequency of 30 Hz and amplitude of 3 mm, and the control group received an exercise program without vibratory stimulation. Intervention was provided for 4 weeks, 3 sessions per week, and 30 minutes per session. In order to measure lower extremity muscle strength the 30-second chair stand test (CST) was used. The Berg Balance Scale (BBS) was used to measure dynamic balance. Static balance was measured by tracking the path length, velocity, and area of the center of pressure (CoP). The Falls Efficacy Scale (FES) was used to measure the subjects' fear of falling. Results: Both the experimental and control group demonstrated statistically significant increase in muscle strength, dynamic balance, and fall efficacy (p<0.05). Only the experimental group showed significant improvements in static balance before and after the intervention (p<0.05). The experimental group showed significantly greater improvements in CST, BBS, and CoP (path length, velocity) than control group (p<0.05). Conclusions: Whole body vibratory stimulation exercise is shown to be a safe and appropriate physical therapy intervention method to enhance muscle strength, balance, and fall efficacy of super-aged women.