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CDMA 이동통신 시스템에서 불규칙한 기지국 안테나 높이를 고려한 장소적 열화율
정찬주(Chan-Ju Jeong),김광준(Kwang-Jun Kim),홍성수(Seong-Soo Hong),박래수(Rae-Soo Park),나상동(Sang-Dong Ra) 한국정보과학회 1995 한국정보과학회 학술발표논문집 Vol.22 No.1
CDMA 셀룰라 이동통신 시스템 설계에서 통화품질의 개선을 위해 불규칙한 기지국 안테나 높이를 고려하여 반송파대 간섭과 전력비(CIR)에 의한 장소적 열화율의 특성을 나타내었다. 본 논문은 7셀 3섹터의 셀 배치구조에서 동일채널 간섭 수신레벨과 인접채널 간섭 수신레벨을 고려한 기지국 위치와 안테나 높이의 불규칙성에 따른 반송파대 간섭비가 장소적 열화율에 미치는 특성을 분석하고, 불규칙한 안테나 높이를 정규분포로한 확률밀도 함수와 장소적 열화율의 누적분포를 구하여 실효치 CIR 5dB일때 소요품질을 5%로 적용하여 기지국 안테나 높이를 평균 30m, 표준편차 10m내에서는 94% 이상의 기지국에서 만족함을 입증하였다.
정찬주 ( Chan-ju Jeong ),유영대 ( Young-dae Yoo ),김은정 ( Eun-jung Kim ) 한국고등직업교육학회 2009 한국고등직업교육학회논문집 Vol.10 No.3
This study compared and measured the flexibility and retention period of PNF(Proprioceptive Neuromuscular Facilitation), Bouncing, and NDM(Neuro Dynamic Mobilization) so that it proved the excellence of each stretching technique. Fifteen subjects with the dearth of hamstring flexibility participated in this study. The subjects divided into three groups. Each group was apported 5 subjects(2 men, 3 women). The result of four-week-exercise suggested that the flexibility of hamstring has been enhanced after applying those stretching techniques. According to the study, Bouncing topped the list when it came to the flexibility, followed by PNF and NDM. However, there was difference on Retention period; the result showed that the flexibility of hamstring applied PNF maintained remarkably but the flexibility of hamstring was not significant as time went by. The study proved that Bouncing was effective to improve the flexibility for a while, wheres PNF had an effect on retention period of flexibility.
승모근 상부의 압통역치와 근활성도에 전기자극 변수가 미치는 영향
정찬주 ( Chan-ju Jeong ),유영대 ( Young-dae Yoo ),김은정 ( Eun-jung Kim ) 한국고등직업교육학회 2010 한국고등직업교육학회논문집 Vol.11 No.1
The purpose of this study was to compare the effect of frequency conditions on muscle activity and VAS in upper trapezius muscle. We selected thirty with men and women with upper trapezius muscle pain, ranging from 20 to 25 years of age. We used SSP, ICT, MWD as treatment devices and analysed one way ANOVA, T-test in windows SPSS Ver. 12.0 A level of significance is α <0.05. The results of this study were as following. Significant changed of pressure pain threshold was noticed in MWD group. Significant change of muscle activity was notice in SSP and MWD group. MWD groups were significantly higher than ICT that of muscle activity and pressure pain threshold. These result shouwed that MWD is effective treatment method for pain control in myofascial pain syndrome on upper trapezius.
안정화 운동과 근력운동이 비특이성 요통환자의 통증, 관절가동범위, 근력, 근 두께에 미치는 영향
정찬주 ( Chan Ju Jeong ),양회송 ( Hoe Song Yang ),유영대 ( Young Dae Yoo ),노현준 ( Hynu Jun Kno ),장윤형 ( Yun Hyung Jang ),문경애 ( Kyoung Ae Moon ),이윤경 ( Kyong Yun ),임창우 ( Chang Woo Lim ),조실금 ( Sil Geum Cho ) 대한통합의학회 2014 대한통합의학회지 Vol.2 No.1
Purpose : The purpose of this study was to find the effects of the lumbar stabilization exercise and strength exercise on pain, ROM, strength, muscle thickness of low back pain(LBP) patients. Method : The subjects were consisted of twelve patients who had nonspecific LBP. All subjects randomly assigned to lumbar stabilization exercise group(N=6) and strength exercise group(N=6). We measured muscular strength, ROM by using Tergumed-extension, rotation and muscle thickness by using ultrasonography and pain score by using Visual analog scale(VAS). The lumbar stabilization exercise group received TOGU exercise, strength exercise group received Tergumed exercise. The data analyzed by repeated measure of Independent t-test, paired t-test, reliability test. Result : The results were as follows. The result which measured of the change of pain score was a significant decrease. The result which measured of the change of ROM and strength was a significant increase. The result which measured of the change of the Internal abdominal oblique, External abdominal oblique on muscle thickness was a significant increase. Stabilization exercise group and Strength exercise group showed the significant difference in muscle thickness on Transversus abdominis, Multifidus. Stabilization exercise group was more increased in muscle thickness. Conclusion : Therefore, we suggest that stabilization exercise is effective for non-specific low back pain.
양회송,허자은,김보영,서동용,안창헌,양훈경,정찬주,이형수,Yang, Hoe-Song,Heo, Ja-Eun,Kim, Bo-Young,Seo, Dong-Yong,An, Chang-Heon,Yang, Hun-Kyung,Jeong, Chan-Ju,Lee, Hyoung-Soo 대한물리치료과학회 2005 대한물리치료과학회지 Vol.12 No.3
The purpose of this study is to find out factors(shoulder level, acromion-occipital length, spine alignment, spine-scapula inferior angle length) of pain of neck & shoulder by 3 Dimensional Moire Scanner. 50 female student s aged 20 to 25 years old participated who lived in Sun-cheon si Jeonnam. They were examined with three measurement methods(Visual Analogue Scale : VAS, Algometer, 3 Dimensional Moire Scanner(IBS-2000). According to the results of multiple regression analysis. 1) There was a significant difference with shoulder level and spine-scapula inferior angle based on VAS. 2) There was a significant difference with shoulder level based of Algometer measurement value in Rhomboid muscles.
신장운동의 적용방식이 무지외반증의 각도와 근활성도 변화에 미치는 영향
송지영 ( Ji Yeong Song ),김윤희 ( Youn Hee Kim ),김주리 ( Ju Ri Kim ),안은혜 ( Eun Hye An ),유지호 ( Ji Ho You ),김성용 ( Sung Yong Kim ),정찬주 ( Chan Joo Jeong ),양회송 ( Hoe Song Yang ),유영대 ( Young Dae Yoo ),배세현 ( Sea Hyu 대한통합의학회 2015 대한통합의학회지 Vol.3 No.4
Purpose: The purpose of this study was to effect of application methods of stretching exercise on angular variation and muscle activation changes in the hallux valgus. Method : This study was performed on twenty subjects. Twenty subjects were divided into two groups; Agonist Contraction(AC)(n=10), Hold-relax with Agonist Contraction(HR-AC)(n=10). Both of the group performed the exercise 5 times a week for 6 weeks. The data was analyzed by the paired t-test for comparing before and after changes of factors in each group and the independent t-test for comparing the between groups. Result : In the within group comparisons, HR-AC group abductor hallucis muscle activity showed significant difference between before and after the intervention(p<0.01). And all the two groups, there were significant decreased in hallux valgus angle(p<0.01). In the comparison of the two groups, there were significant difference among the two groups in abductor hallucis muscle activity(p<0.01). Conclusion : The findings of this study, we found that the HR-AC technique were more effective than AC technique in increase in abductor hallucis muscle activity.
음파진동기와 스위스볼을 이용한 허리안정화운동이 근육두께와 수축시간에 미치는 영향
김용수 ( Yong Su Kim ),이진명 ( Jin Myung Lee ),박소현 ( So Hyun Park ),박혜리 ( Hyery Park ),최민주 ( Min Ju Choi ),김세광 ( Se Gwang Kim ),양회송(교신저자) ( Hoe Song Yang ),정찬주 ( Chan Joo Jeong ),유영대 ( Young Dae Yoo ),전현주 대한통합의학회 2016 대한통합의학회지 Vol.4 No.1
Purpose : The purpose of this study was to investigate the effects on the muscle thickness and contraction time using sound wave vibrator and swiss ball. Methods : This study was performed on 20 subjects. 20 subjects were divided into two groups; Lumbar stability exercise using sound wave vibrator exercise(n=10)(Group1), Lumbar stability exercise using Swiss ball exercise(n=10)(Group2). Both of the group performed the exercise 3 times a week for 5 weeks. The data was analyzed by the paired t-test to compare before and after difference of factors on each group and the Independent t-test to compare the between groups. Results : Both group were increased muscle contracture time on Straight Leg Rise(SLR) test (p<0.05). It means both group were increased lumbar stability. However, by comparing the between groups, there were no statistically significant difference about muscle thickness of multifidus and transverse abdominal.(p>0.05). Conclusion : As a result of this study, we suggest that the sound wave vibrator may be effective exercise tool for lumbar stability exercise like a swiss ball.