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RISS 인기검색어
- 검색키워드
- 저자 : Giwon Kim (검색결과 57 건)
- 무료
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Giwon Kim,Yeon Sil Kim,Eun Ji Han,Ie Ryung Yoo,Jin-Ho Song,Sang-Nam Lee,Jong Hoon Lee,Byung-Oak Choi,Hong-Seok Jang,Sei-Chul Yoon 대한방사선종양학회 2011 Radiation Oncology Journal Vol.29 No.4
Purpose: To evaluate the prognostic value of metabolic tumor volume (MTV) and maximum standardized uptake value (SUVmax) on initial positron emission tomography-computed tomography (PET-CT) and investigate the clinical value of SUVmax for early detection of locoregional recurrent disease after postoperative radiotherapy in patients with locally advanced head and neck squamous cell carcinoma (HNSCC). Materials and Methods: A total of 100 patients with locally advanced HNSCC received primary tumor excision and neck dissection followed by adjuvant radiotherapy with or without chemotherapy. The MTV and SUVmax were measured from primary sites and neck nodes. The prognostic value of MTV and SUVmax were assessed using initial staging PET/CT (study A). Follow-up PET/CT scan available after postoperative concurrent chemoradiotherapy or radiotherapy were evaluated for the SUVmax value and correlated with locoregional recurrence (study B). A receiver operating characteristic (ROC) curve analysis was used to define a threshold value of SUVmax with the highest accuracy for recurrent disease assessment. Results: High MTV (>41 mL) is negative prognostic factor for disease free survival (p = 0.041). Postradiation SUVmax was significantly correlated with locoregional recurrence (hazard ratio 1.812; 95% confidence interval 1.361 to 2.413; p < 0.001). A cut-off value of 5.38 from follow-up PET/CT was identified as having maximal accuracy for detecting locoregional recurrence by ROC analysis. Conclusion: MTV at staging work-up was significantly associated with disease free survival. The SUVmax value from follow-up PET/CT showed high diagnostic accuracy for the detection of locoregional recurrence in postoperatively irradiated HNSCC.
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Kim, Sangbin,Kim, Giwon,Kim, Junesun 대한물리치료학회 2015 대한물리치료학회지 Vol.27 No.4
Purpose: The purpose of this study was to investigate the availability of software for rehabilitation with the Kinect sensor by presenting an efficient algorithm based on machine learning when classifying the motion data of the PNF pattern if the subjects were wearing a patient gown. Methods: The motion data of the PNF pattern for upper extremities were collected by Kinect sensor. The data were obtained from 8 normal university students without the limitation of upper extremities. The subjects, wearing a T-shirt, performed the PNF patterns, D1 and D2 flexion, extensions, 30 times; the same protocol was repeated while wearing a patient gown to compare the classification performance of algorithms. For comparison of performance, we chose four algorithms, Naive Bayes Classifier, C4.5, Multilayer Perceptron, and Hidden Markov Model. The motion data for wearing a T-shirt were used for the training set, and 10 fold cross-validation test was performed. The motion data for wearing a gown were used for the test set. Results: The results showed that all of the algorithms performed well with 10 fold cross-validation test. However, when classifying the data with a hospital gown, Hidden Markov model (HMM) was the best algorithm for classifying the motion of PNF. Conclusion: We showed that HMM is the most efficient algorithm that could handle the sequence data related to time. Thus, we suggested that the algorithm which considered the sequence of motion, such as HMM, would be selected when developing software for rehabilitation which required determining the correctness of the motion.
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A Content-Aware Video Encoding Scheme Based on Single-Pass Consistent Quality Control
Kim, Giwon,Yi, Kang,Kyung, Chong-Min IEEE 2016 IEEE transactions on broadcasting Vol.62 No.4
<P>In real-time video streaming applications based on battery-powered camera systems, it is crucial to capture and transmit critical information satisfying the storage capacity and channel bandwidth requirement. In this paper, we propose a single-pass content-aware video encoding scheme for such applications to achieve a consistent video quality while satisfying the bit-rate constraints. To achieve the objective we developed: 1) scene descriptor based on the discrete cosine transformation coefficients obtained from the video encoder; 2) a parameterized analytic distortion model for video encoding using the scene descriptor; 3) scene change detection based on the encoded MB mode ratio; and 4) a single-pass consistent video quality control scheme which exploits 1), 2), and 3). Experimental results show that the proposed method results in less deviation from the target distortion and less distortion variance than the up-to-date best result by up to 65.25% and 75.88%, respectively, while satisfying the given rate constraints. The computing time overhead in the proposed method was 0.560% and 0.571% for the variable and constrained variable bit-rate mode, respectively, which is negligible in nearly all embedded applications.</P>
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( Giwon Kim ),( Kyunghee Lee ) 대한물리치료학회 2016 대한물리치료학회지 Vol.28 No.1
Purpose: Physical therapists are likely to be exposed to work-related musculoskeletal pain due to excessive repetitive tasks. This study was conducted to identify the relationship between work-related musculoskeletal pain and quality of life of physical therapists. Methods: A self-reported questionnaires was sent to 200 physical therapists at in Seoul and Kyoungido. The questionnaires was returned by 170 physical therapists. The questionnaire had included 4 items that coveringed demographic information, areas of musculoskeletal problems, pain rating scale, and WHOQOL-BREF. The analysis was completed using descriptive statistics, and differences between pain and demographic variables were identified using the chi-square test. The relationship between work-related musculoskeletal pain and quality of life was analyzed by t-test and Pearson`s correlation. Results: The overall prevalence of work-related musculoskeletal pain was 76.8%. The most affected pain sites included the low back (48.8%), shoulder (45.,2%), hand and wrist (43.5%), and neck (33.3%). Pain ratings of subjects with pain was were moderate. There was a A significant difference for the subdomains of quality of life was observed between the subjects with musculoskeletal pain and those without pain. Weak negative correlations (r=-0.28) were observed between pain rating scale and QOL. Conclusion: These findings show that physical therapists appear to be at a higher risk for work-related musculoskeletal pain and physical domain of QOL. Therefore, Ffurther research is needed to investigate examine the effect of risk factors and ergonomics as physical load, general health status on prevalence of musculoskeletal pain.
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Study of Work-Related Musculoskeletal Pain and Health-Related Quality of Life among Hospital Workers
( Giwon Kim ),( Chun Sun Lee ),( Kyunghee Lee ) 대한물리치료학회 2019 대한물리치료학회지 Vol.31 No.5
Purpose: This study examined the work-related musculoskeletal pain and quality of life of hospital workers. Methods: Self-reported questionnaires were sent to 350 hospital workers at Seoul and Gyeonggi-do, of which 341 were returned. The questionnaire had four items that covered the demographic information, areas of musculoskeletal problems, pain rating scale, and quali ty of life. The analysis was completed using descriptive statistic, and the differences between pain and demographic variables were iden tified using a chi-square test. The differences between the type of occupation and quality of life were analyzed by one-way analysis of variance and a Kruskal-Wallis test. Results: The 12-month prevalence of work-related musculoskeletal pain was 86.1% of physical therapists, 86.5% of occupational thera pists, 77.1% of dental hygienists, and 75.8% of nurses. A significant difference in the general and work related variables was observed between the subject with a physical burden and type of occupation. The most affected pain sites of the physical therapist included low back, hand and wrist, shoulder, and neck. The occupational therapists included the hand and wrist, shoulder, neck, but the nurses and dental hygienists reported the shoulder, back, hand and wrist. A significant difference in the quality of life was noted between the sub jects in physical therapists and dental hygienists and the subjects in the nurses and occupational therapists (p=0.00). Conclusion: These findings show that hospital workers appear to be high risk for work-related musculoskeletal pain, and the quality of life of physical therapists and nurses was higher than that of dental hygienists and occupational therapists.
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Kim, Giwon,Lee, Kyunghee 대한물리치료학회 2016 대한물리치료학회지 Vol.28 No.1
Purpose: Physical therapists are likely to be exposed to work-related musculoskeletal pain due to excessive repetitive tasks. This study was conducted to identify the relationship between work-related musculoskeletal pain and quality of life of physical therapists. Methods: A self-reported questionnaires was sent to 200 physical therapists at in Seoul and Kyoungido. The questionnaires was returned by 170 physical therapists. The questionnaire had included 4 items that coveringed demographic information, areas of musculoskeletal problems, pain rating scale, and WHOQOL-BREF. The analysis was completed using descriptive statistics, and differences between pain and demographic variables were identified using the chi-square test. The relationship between work-related musculoskeletal pain and quality of life was analyzed by t-test and Pearson's correlation. Results: The overall prevalence of work-related musculoskeletal pain was 76.8%. The most affected pain sites included the low back (48.8%), shoulder (45.,2%), hand and wrist (43.5%), and neck (33.3%). Pain ratings of subjects with pain was were moderate. There was a A significant difference for the subdomains of quality of life was observed between the subjects with musculoskeletal pain and those without pain. Weak negative correlations (r=-0.28) were observed between pain rating scale and QOL. Conclusion: These findings show that physical therapists appear to be at a higher risk for work-related musculoskeletal pain and physical domain of QOL. Therefore, Ffurther research is needed to investigate examine the effect of risk factors and ergonomics as physical load, general health status on prevalence of musculoskeletal pain.
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Study of Work-Related Musculoskeletal Pain and Health-related Quality of Life among Hospital Workers
Kim, Giwon,Lee, Chun Sun,Lee, Kyunghee 대한물리치료학회 2019 대한물리치료학회지 Vol.31 No.5
Purpose: This study examined the work-related musculoskeletal pain and quality of life of hospital workers. Methods: Self-reported questionnaires were sent to 350 hospital workers at Seoul and Gyeonggi-do, of which 341 were returned. The questionnaire had four items that covered the demographic information, areas of musculoskeletal problems, pain rating scale, and quality of life. The analysis was completed using descriptive statistic, and the differences between pain and demographic variables were identified using a chi-square test. The differences between the type of occupation and quality of life were analyzed by one-way analysis of variance and a Kruskal-Wallis test. Results: The 12-month prevalence of work-related musculoskeletal pain was 86.1% of physical therapists, 86.5% of occupational therapists, 77.1% of dental hygienists, and 75.8% of nurses. A significant difference in the general and work related variables was observed between the subject with a physical burden and type of occupation. The most affected pain sites of the physical therapist included low back, hand and wrist, shoulder, and neck. The occupational therapists included the hand and wrist, shoulder, neck, but the nurses and dental hygienists reported the shoulder, back, hand and wrist. A significant difference in the quality of life was noted between the subjects in physical therapists and dental hygienists and the subjects in the nurses and occupational therapists (p=0.00). Conclusion: These findings show that hospital workers appear to be high risk for work-related musculoskeletal pain, and the quality of life of physical therapists and nurses was higher than that of dental hygienists and occupational therapists.
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김진수(Kim JinSu),김진숙(Kim JinSuk),박기원(Park GiWon) 한국뷰티산업학회 2008 뷰티산업연구 Vol.3 No.2
오늘날 헤어스타일은 외형적 이미지가 한 개인의 가치를 판단하는데 중요한 요소가 되고 있다. 이러한 루키즘 영향은 헤어스타일이 인간의 미에 대한 욕구 충족의 기준이 되고 있다. 따라서 본 연구에서는 선과 면 이미지의 헤어스타일을 이용하여 고객들의 개성을 부각 시키고 단점을 보완하는 원리를 사례 분석을 통하여 정리해 보고자 한다. 시각적인 특성을 이용한 현대인들의 이상적인 개성․감성․가치관을 표현하는 헤어스타일을 연출하는데 있어서는 선․면의 다양한 사용과 실루엣의 변형을 통해 그 움직임을 기준으로 정리하고자 하였다. 이와 같은 방법으로 연구한 내용의 결과는, 선이나 방향을 한곳으로 집중시키거나 색상 의 위치 변형으로 인한 시각적 혼란을, 시선을 집중시켜 다시 보고자 하는 욕구로 디자인 원리 중 포인트를 강조한 미로 표현되었고, 결과적으로 고객이 요구하는 개인의 개성을 부각 시키면서도 창조적인 아름다움을 나타낼 수 있는 헤어스타일 연출이 가능함을 보여 주었다. 본 연구에서는 선과 면의 이미지를 이용하여 헤어스타일의 창조적 욕구와 시각적 이미지를 통해 현대인의 외형적인 개성미를 창출해 내고, 현대 헤어스타일 표현에 선과 면의 적용 가능성과 그들의 한계점은 없는지 살펴보는데 그 의의를 두고자 한다. Today the hair style has become an essential factor to judge individual values. According to Lookism effect, the hair style has become a standard of a beauty satisfaction. Therefore, this research is going to indicate some cases that emphasize customer s characters and diminish their weak points using appropriate line and side images. In terms of expressing hair styles which represent individual characters, sensibilities and values, various line and side images and silhouette s modifications are utilized. The result of this research is that organize visual confusions caused by one sided line & side directions or changes of a colour position. As a satisfaction of getting a focus, the point is stressed. As a consequence, it demonstrates that hair styles are be able to highlight individual characters as well as creative beauties In this research, the desire and visual image of the creative hair styles using line and side images are utilized to represent characteristic appearances. In addition, the possibilities and limitations of using line and side image as a hair styles are studied
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