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IEEE 802.15.4 무선 스타 센서 네트워크에서 비콘 신호 주기에 따른 센서 노드 전력소모량 분석
유영대,최정훈,김남,Yoo Young-Dae,Choi Jung-Han,Kim Nam 한국통신학회 2006 韓國通信學會論文誌 Vol.31 No.9B
본 논문에서는 IEEE 802.15.4 MAC 프로토콜을 사용하는 스타 센서 네트워크에서 각각의 센서 노드에서 소모되는 전력을 분석 파라미터별로 연관성과 전력소모에 미치는 영향을 분석하였다. 성능분석을 위하여 데이터 전송과정에 소요되는 시간과 평균 송수신 전력랑으로 센서 노드 전력소모랑을 수식으로 전개하였으며, CSEM에서 제작한 WiseNET 시스템 측정값을 활용하였다. 모의실험결과 단일 센서 네트워크보다 10개의 센서 노드로 이루어진 센서 네트워크에서 전력소모가 평균 20% 증가 했으며, 비콘 신호 주기가 0.1초일 때 up-link가 down-link 보다 평균 2.5배 전력소모가 많았다. 비콘 신호 주기가 1초일 때 센서 노드 수가 100개로 증가하거나, 센싱 데이터가 100 byte로 증가하면 전력소모량이 약 2.3배 증가 하였으며, 868/915 MHz가 2.4 GHz보다 $6{\sim}12$배 전력소모량이 많았다. In this paper, The correlation of the power consumption of sensor node is analyzed according to the analyze parameter in IEEE 802.15.4 star sensor network. And It is studied the influence on analysis parameter. The power consumption of sensor network in transmission process and average transmission power consumption drives to numerical formula. And CSEM WiseNET system measurement value is used. As a simulation result, The power consumption of sensor node in star network consist of 10 sensor nodes is more than 20 % that in single network in average. When beacon signal interval is 0.1 second in all frequency bands, the power consumption of sensor node in up-link is more than 2.5 times that in down-link in average. When beacon signal interval is 1 second and the number of sensor nodes increases to 100 and sensing data increases to 100 byte, the power consumption of sensor node increases to 2.3 times. And The superior performance of 2.4 GHz frequency band has than 868/915 MHz frequency band up to $6{\sim}12$ times.
유영대,김용남,Yoo, Young-Dae,Kim, Yong-Nam 대한물리치료과학회 2002 대한물리치료과학회지 Vol.9 No.3
This study questionnaires 166 inpatients and outpatients with stroke in 8 hospitals, including Wonkwang University Gwangju Korean Hospital from July 2 to 31, 2001 in order to find out the influence of general nature, smoking, drinking, obesity, and perception of saltness of patients with stork on the outbreak of stroke and to examine important factors by dividing into hemorrhagic and ischemic stroke. Finally, collected data is analyzed statistically, using SPSS 7.5 statistics package. This study reaches a conclusion as follows. 1. For general nature, 86(51.8%) patients have hemorrhagic stroke and 80(48.2%), ischemic stroke in the rate of 1.59:1(male:female), suggesting that male's outbreak is more than female's. Outbreak age is ranged from 20 years to 90 years in order of 60's, 50's, and 40's. 50's-60's accounts for more than half percentage. 2. For smoking, 73(71.6%) of male patients has smoking experience and their 562% has ischemic stroke. Their cross-analysis for hemorrhagic and ischemic stroke shows significant difference with $x^2=3.90$(p<0.05). 48.6% of patients with smoking experience is ranged from 1 to 10 a day in smoking quantity. 3. For drinking, 90(88.2%) of male patients has drinking experience and their 53.3% has hemorrhagicstroke. Their cross-analysis for hemorrhagic and ischemic stroke shows no significant difference with x2=3.40(p<0.1). 59.3% of patients with drinking experience is classified as a overdrinking group. 4. For obesity, low weight is 8(4.8%): normal, 111(66.9%): excessive, 40(24.1%), and obesity, 7(4.2%). In patients with hemorrhagic stroke, excessive weight and obesity are somewhat high(33.7%). The cross-analysis for male's hemorrhagic and ischemic stork by dividing BMI into more and less than 25 shows no significant difference with x=3.52(p<0.1). 5. For perception of saltness, 21(12.7%) patients eat flat: 76(45.8%) normally, and 69(41.5%), saltily. Many patients with ischemic stroke are classified as a group who eat saltily. The cross-analysis for male's hemorrhagic and ischemic stroke shows signifiant difference with x2=10.99(p<0.05). As this study has small sample and selects inpatient and outpatient in certain local hospital, it is difficult to generalize. But the cross-analysis of male's hemorrhagic and ischemic stroke shows signifiant difference in smoking and perception of saltness. Drinking and obesity are more important factors in hemorrhagic stroke and smoking and perception of saltness in ischemic stroke.
전침자극과 운동치료가 허혈성 뇌졸중 백서모델의 골격근에 미치는 영향
유영대,김사열,민순규,Yoo, Young-Dae,Kim, So-Youl,Min, Soon-Gyu 대한물리치료학회 2006 대한물리치료학회지 Vol.18 No.3
Purpose: This study was intended to examine the effects of electroacupuncture and therapeutic exercise on muscle atrophy and exercise function in an ischemic stroke model induced by middle cerebral artery occlusion. Methods: This study selected 120 Sprangue-Dawley rats, 8-week of age, divided them into six groups, and assigned 5 rats to each group. Experiments were conducted for 1, 3 days, 1, and 8 weeks, respectively. Group I was a group of electroacupuncture and therapeutic exercise after inducing ischemic stroke; Group II was a group of therapeutic exercise after inducing ischemic stroke; Group III was a group of electroacupuncture after inducing ischemic stroke; Group IV was a sham group of electroacupuncture after inducing ischemic stroke; Group V was a control group and Group VI was a sham group without ischemic stroke. In each group, changes in weight of muscle and relative muscle of TA muscle, neurologic motor behavior test, histologic observations were observed and analyzed. Results: For the changes in muscle weight of unaffected and affected sides of TA muscle, muscle atrophy was seen in an affected side 3 days after ischemic stroke was induced. There was statistically significant difference in Group I 1 week and 8 weeks after ischemic stroke was induced, compared to Group V (p<0.05). For the changes in relative muscle weight of unaffected and affected sides of tibial anterior muscle, there was significant decrease in each group 3 days after ischemic stroke was induced, compared to Group IV, while there was statistically significant increase in Group I 1 week after ischemic stroke was induced, compared to Group V (p<0.05). For neuologic exercise behavior test, Group I generally had the highest score, compared to other groups. Conclusion: electroacupuncture and therapeutic exercise may improve muscle atrophy and change in histologic observations expression of ischemic stroke rats and contribute to the improvement of exercise function.
유영대(Young Dae Yoo) 한국문학교육학회 1998 문학교육학 Vol.2 No.-
This study examines the characteristics of Sinjaehyo`s Paktaryong(박타령) as a revised version of Pansori(판소리) Hungboga(홍보가). Paktaryong has two contradictory intentions in it`s poetic diction and the way of exposuring subject. In it`s poetic diction, Paktaryong contains flowery words in Chinese Character and peoples spoken language. In it`s way of exposuring subject, Paktaryong describes both the nobles Yangban`s(양반) aspect, and peoples critical tone. This contradictory dualism of Paktaryong result not only from Sinjaehyo`s social status but also from the contradiction and conflict in the middle of 19th century.
유영대(Young-Dae Yoo),양재군(Jae-Gun Yang),배재학(Jae-Hak J. Bae) 한국산업경영시스템학회 2008 한국산업경영시스템학회 학술대회 Vol.2008 No.하계
Multi-robot is the system that a lot of robots build a network and try to complete a mission through their cooperation. In the multi-robot, it is most important to maintain the stable communication network. When we control a robot in real-time, the communication delay and failure can cause serious problems. In this paper, we propose an overall control communication structure of the multi-robot system. We implement and experiment the new communication structure for the multi-robot system, message format design, mission change and position awareness, etc. As a result, multi-robot system can maintain stable networking and receive correct orders from a main PC.
유영대(Young-Dae Yoo),장선아(Seon-Ah Jang),양재군(Jae-Gun Yang),박지현(Ji-Hyun Park),배재학(Jae-Hak Bae) 한국정보과학회 2008 한국정보과학회 학술발표논문집 Vol.35 No.1
본 논문에서는 교구용 소형 로봇으로 구현한 군집로봇 시스템을 소개한다. 각 로봇에 내장된 블루투스 무선통신으로 군집로봇 네트워크를 구성하였다. 실험에 사용한 로봇은 LEGO<SUP>?</SUP> MINDSTORMS<SUP>?</SUP> NXT이다. 여러 로봇이 라인으로 표현한 대형 미로를 동시에 탐사하는 환경을 가정하였다. 이런 상황에서 각 로봇은 주어진 임무를 수행하면서 센서로 주변 환경 정보를 측정해서 대표 로봇에게 보낸다. 여기에 필요한 메시지 구조를 군집로봇에 적절하도록 설계하였다. 이렇게 군집로봇을 구현하고 실험한 결과, 그룹 대표로봇이 통신을 중계하는 방법으로 통신거리 제약을 해소할 수 있었다.
반신욕을 병행한 유산소 운동프로그램이 체성분과 폐기능에 미치는 영향
유영대(Young-Dae Yoo)양회송(Hoe-song Yang),강효정(Hyo-Jung Kang)김민규(Min-Kyu Kim),정찬주(Chan-Joo Jeong) 대한심장호흡물리치료학회 2020 대한심장호흡물리치료학회지 Vol.8 No.2
Purpose : This study aims to investigate how aerobic exercise and aerobic exercise programs with half bath can affect body composition and pulmonary function. Methods : A total of 20 subjects were enrolled in this study. The subjects were divided into two groups: aerobic exercise with half-bath program (n = 10) and only aerobic exercise (n = 10). The two groups performed the exercise four times a week over a period of 5 weeks. The Wilcoxon test was used to compare the data before and after significant difference of factors in each group;and the Mann-Whitney test was used for a comparison between groups. Results : In this study;the results showed the following. On the aerobic exercise with half-bath program group;by comparing the body composition before and after intervention;there was a significant difference in the amount of skeletal muscle and body fat. However;by comparing pulmonary functions before and after intervention;there was no significant difference in FVC;FEV1;and VC. Conclusion : According to our results;it seems that the aerobic program with half bath might have an effect on body composition.