http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
회화문화재 객체검출을 위한 학습용 이미지 데이터셋 구축 방안 연구
권도형 ( Do-hyung Kwon ),유정민 ( Jeong-min Yu ) 한국정보처리학회 2021 한국정보처리학회 학술대회논문집 Vol.28 No.2
본 연구는 회화문화재 속에 표현된 다양한 종류의 객체를 검출할 수 있는 딥러닝 모델생성을 위해 필요한 학습용 이미지 데이터셋 구축방안을 제안한다. 먼저 기존 동양화 기반의 회화문화재 이미지 데이터 및 객체 특징 분석을 진행하였고, 이를 바탕으로 Natural image에 Pose transfer 및 Style transfer를 적용한 새로운 방식의 회화문화재 이미지 데이터 생성 방법을 제안한다. 제안한 프레임워크를 통해 기존 문화재 분야에서 가지고 있던 제한된 데이터 구축문제를 극복하고, 검출모델 생성을 위한 대용량의 학습데이터 구축 가능성을 제시하였다.
슬링을 이용한 교각운동 시 장력센서와 경사계를 이용한 시각적 피드백이 근활성도에 미치는 영향
권유정 ( Yu-jeong Kwon ),송민영 ( Min-young Song ) 대한통합의학회 2021 대한통합의학회지 Vol.9 No.1
Purpose: This study aimed to compare the relative muscle activity on the erector spinae, gluteus maximus, and hamstring, using a non-visual feedback bridge exercise and a visual feedback bridge exercise with a tension sensor and clinometer. Methods: Twenty-two healthy subjects participated in this study. The study subjects performed bridge exercises without visual feedback, bridge exercises using a tension sensor, and bridge exercises using an inclinometer in the supine position, and the muscle activity of the left and right erector spinae, gluteus maximus, and hamstring muscles was measured while maintaining isometric contraction during the bridge movement. Muscle activity was measured by using surface an electromyography equipment. To standardize the measured action potential of each muscle, the maximum voluntary isometric contraction was measured. The bridge exercise was repeated 3 times for 5s each. Using repeated analysis of variance, we compared the significant difference in EMG activity for each muscle between the three experiments, and all statistical processing was performed using SPSS version 26. The statistical significance level was set at α = 0.05. Results: During bridging exercises, the asymmetry of the muscle activity of the erector spinae and gluteus maximus during visual feedback guiding was lower than that during no visual feedback. However, there was no significant difference. Moreover, the asymmetry of the muscle activity of the hamstring muscles was significantly lower during tension sensor visual feedback than that during no visual feedback (p<0.05). Conclusion: These findings suggest that bridge exercise with visual feedback using a tension sensor and an inclinometer is effective in inducing symmetrical movement. When it is necessary to symmetrically adjust the weight load of both feet during the bridge exercise, it is effective to apply visual feedback using a tension sensor.
무릎관절 굽힘 각도에 따른 뒤꿈치 들기 동안 종아리 세갈래근의 활성도
권유정 ( Yu Jeong Kwon ),송민영 ( Min Young Song ) 대한물리의학회 2013 대한물리의학회지 Vol.8 No.4
PURPOSE: The purpose of this study was to investigate the change of triceps surae activation during heel raise test in standing among knee flexion angles(0°, 30°, 45°,60°). METHODS: Twenty healthy individuals performed unilateral plantarflexion in standing with 0°, 30°, 45°, 60° knee flexion. Activity of medial gastrocnemius(MG), lateral gastrocnemius(LG), soleus(Sol) was recorded with surface electromyography(EMG). RESULT: The muscle activations induced the four different positions were compared and results showed that was significant difference MG and LG while the angle increase from 0° to 30°, 45°, 60° but Sol did not show significant differences in every angle. CONCLUSION: This study suggest that 30° knee flexion is required to induce a significant mechanical disadvantage of gastrocnemius.
유기-무기 하이브리드 압전 나노복합체 기반의 플렉서블 에너지 하베스터 제작 및 발전성능 평가
권유정,현동열,박귀일,Kwon, Yu Jeong,Hyeon, Dong Yeol,Park, Kwi-Il 한국재료학회 2019 한국재료학회지 Vol.29 No.6
A flexible piezoelectric energy harvester(f-PEH) that converts tiny mechanical and vibrational energy resources into electric signals without any restraints is drawing attention as a self-powered source to operate flexible electronic systems. In particular, the nanocomposites-based f-PEHs fabricated by a simple and low-cost spin-coating method show a mechanically stable and high output performance compared to only piezoelectric polymers or perovskite thin films. Here, the non-piezoelectric polymer matrix of the nanocomposite-based f-PEH is replaced by a P(VDF-TrFE) piezoelectric polymer to improve the output performance generated from the f-PEH. The piezoelectric hybrid nanocomposite is produced by distributing the perovskite PZT nanoparticles inside the piezoelectric elastomer; subsequently, the piezoelectric hybrid material is spin-coated onto a thin metal substrate to achieve a nanocomposite-based f-PEH. A fabricated energy device after a two-step poling process shows a maximum output voltage of 9.4 V and a current of 160 nA under repeated mechanical bending. Finite element analysis(FEA) simulation results support the experimental results.
권유정(Kwon, Yu-Jeong),이현옥(Lee, Hyun-Ok) 한국체육과학회 2013 한국체육과학회지 Vol.22 No.4
Purpose: The purpose of this study was to examine the activity of the abdominal muscle in women who experienced parturition and those who did not experience any parturition. Method: A total of 26 subjects(postpartum women 14, control group 12) performed active straight leg raising to 20cm from the ground and the activities of the internal oblique abdominal muscle, the external oblique abdominal muscle, and the rectus abdominis muscle on both sides were measured using electromyography. The efforts to raise leg was scored(Likert scale). Then, the subjects conducted maximum isometric contraction for hip joint flexion at 20cm leg raise height, maximum torque and abdominal muscle activity were measured using electromyography. Results: During active straight leg raising, abdominal muscle activity and Likert scales were shown to be higher in postpartum women. The activity of abdominal muscle and the maximum torque of hip joint flexion when maximum isometric contraction were shown to be higher in women who did not experience any parturition. Conclusion; The abdominal muscles of postpartum women are recruited more to maintain pelvic stability during active straight leg raising but are relatively weaker when powerful force is required. Therefore, we consider that more abdominal muscle training is necessary to maintain pelvic stability in postpartum women.
근수축 형태(유지-이완과 수축-이완 기법)에 따른 어깨 굽힘근과 폄근의 근활성도 비교
이현옥,권유정,Lee, Hyun-Ok,Kwon, Yu-Jeong 대한고유수용성신경근촉진법학회 2015 PNF and Movement Vol.13 No.1
Purpose: This study aimed to examine the activity of the shoulder flexor and extensor when hold-relax and contraction-relax techniques were applied with shoulder joint flexion. Methods: The subjects of this study were 15 healthy women. With the shoulder joint flexion at $0^{\circ}$ and $90^{\circ}$, hold-relax and contraction-relax techniques were applied for the same submaximal resistance to measure the activities of the deltoid muscle anterior fiber, deltoid muscle posterior fiber, pectoralis major fiber, and latissimus dorsi muscle with surface electromyography. An independent t-test was conducted in order to compare activities of each muscle according to the two techniques. Results: When the hold-relax and contraction-relax techniques were applied with the shoulder joint flexion at $0^{\circ}$, the activities of the shoulder flexor and extensor were not significantly different, but the activity of the flexor was higher when the contraction-relax technique was applied than when the hold-relax technique was applied. When the hold-relax and contraction-relax techniques were applied with the shoulder joint flexed at $90^{\circ}$, the activities of the shoulder flexor and extensor were not significantly different, but the activity of the extensor was relatively higher than when the flexor was at $0^{\circ}$ Conclusion: When the hold-relax and contraction-relax techniques were applied with the shoulder joint flexion at $0^{\circ}$, the activities of the shoulder flexor and extensor were not significantly different, but the activity of the flexor was higher when the contraction-relax technique was applied than when the hold-relax technique was applied. When the hold-relax and contraction-relax techniques were applied with the shoulder joint flexed at $90^{\circ}$, the activities of the shoulder flexor and extensor were not significantly different, but the activity of the extensor was relatively higher than when the flexor was at $0^{\circ}$.
동측과 반대편의 지팡이 사용에 대한 무릎의 모멘트 분석
이현옥,양경혜,권유정,Lee, Hyun-Ok,Yang, Kyung-Hye,Kwon, Yu-Jeong 대한물리치료학회 2014 대한물리치료학회지 Vol.26 No.2
Purpose: The purpose of this study was to compare the effects of force of ipsilateral versus contralateral cane usage on knee moments in healthy young adults. Methods: A convenience sample of 10 subjects volunteered for this study. Subjects walked over a force plate under three different conditions; unaided and ipsilateral cane and contralateral cane. Analysis of data on moment of the knee joint and ground reaction force was performed using the OrthoTrak program. Results: Flexion moment of the knee was decreased with the contralateral cane, but increased with the ipsilateral cane compared with normal gait. Extension moment of the knee was decreased with the contralateral cane compared with normal gait(p<0.05) and it was showed a greater decrease with the contralateral cane than with the ipsilateral cane gait(p=0.00). Valgus moment of the knee joint was increased with the ipsilateral cane but decreased with the contralateral cane. Vertical ground peak force was decreased with the ipsilateral cane compared with normal gait (p<0.05). Conclusion: The following conclusions were drawn from our data. Contralateral cane gait is more efficacious for persons with weakness of knee extensors, however, for a patient with varus deformity, the cane should be used in the ipsilateral hand.