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Indoor short track speed skating 500m, 1000m 滑走時 運動强度에 關한 硏究
李正秀,曺泰浩,柳喜男,卞宰文 경희대학교 체육과학연구소 1985 體育學論文集 Vol.13 No.-
(Conclusion) With 4 Indoor short track topped skating players of junior as the subjects, this research was made in order to reveal the degree of work intensity by measuring how %H.R max would change when they do the skating 500m, 1000m. The results are as follow. 1.Work intensity of 500m skating. Mean H.R was appeared 161.25 ± 10.88 beats/min, %H.R max was 76.02% as 500m skating, H.R max as 500m skating was appeared 174.00 ± 9.90 beats/min,% H.R max they had skated. 2.Work Intensity of 1000m skating. Mean H.R was appeared 166.88 ± 17.92 beats/min,% H.R max was 80.64%, as 1000m skating, H.R max was appeared 183.75 ± 6.34 beats/min,% H.R max was 94.48% as they had skated 1000m. 3.Correlation coefficient and regression line equation between H.R max and speed as skating. Correlation coefficient was seen certainly as 0.467 between H.R max and speed, was at the level of 1% (P < 0.01), Sy. x was placed nearly on the regression line, regression equation was appeared Y = 0.05x-0.81. (Suggestion) As 500m, 1000m skating are end within short time, they have to progress the technique and work capacity so that they are able to exhibit the speed within short time after start.
Mode 합성법을 이용한 머시닝 센터의 모델링에 관한연구
노승훈,조희재 國立金烏工科大學校附設生産技術硏究所 1997 産業技術開發硏究 Vol.13 No.-
This paper describes a new approach to the analysis of the dynamic response of a machining center. This approach, refered to as the mode synthesis or component mode sysnthesis, has many advantages compared with the conventional approaches. These terms are employed to sysnthesize the individual modes to analyze the vibration mode of the complicated structures. In this study a machining center is considered to present the basic ideas of the method, and its utility is investigated. The proposed idea is proved to be a very accurate estimate of the natural frequencies of the combined structures as well as the modes of vibrations.
조남경,김재진,김희석 청주대학교 산업과학연구소 2000 産業科學硏究 Vol.17 No.2
The Profile Driven Synthesis System(PDSS) is low power methodologies. For given design and a set of input vectors, the switching activity in the design yields a measure of the power consumption The profile data with the switching activity data in the precharacterized module library is use to estimate the average switching activity of all the module set meeting other user-specified constraints such as area and delay. In the results show that the switching activity estimated during synthesis deviates reduce 10% on the average from the actual switching activity.
Carbon Nanotube-Based Triode Field Emission Lamps Using Metal Meshes With Spacers
Cho, Woo-Sung,Lee, Hyeon-Jae,Lee, Yang-Doo,Park, Jung-Ho,Kim, Jai-Kyeong,Lee, Yun-Hi,Ju, Byeong-Kwon IEEE 2007 IEEE electron device letters Vol.28 No.5
<P>We fabricated a carbon nanotube (CNT)-based triode field emission flat lamp with a gated emitter structure, which is composed of a metal grid with a spacer as a gate, a cathode electrode layer, and a CNT layer. The metal mesh was designed with trenches and numerous holes to make a gap between gate and cathode electrodes and to provide electrons with a highly efficient passage. We observed that this metal mesh decreased the vibration and leakage current owing to high electric field generated from anode. As a result, the uniformity and stability of this field emission lamp was improved</P>
Cho, Yu-Jeong,Song, Yun-Kyung,Cha, Yun-Yeop,Shin, Byung-Cheul,Shin, Im-Hee,Park, Hi-Joon,Lee, Hyang-Sook,Kim, Koh-Woon,Cho, Jae-Heung,Chung, Won-Suk,Lee, Jun-Hwan,Song, Mi-Yeon Lippincott Williams Wilkins, Inc. 2013 1528-1159) Vol.38 No.7
STUDY DESIGN.: Multicenter, randomized, patient-assessor blind, sham-controlled clinical trial. OBJECTIVE.: To investigate the efficacy of acupuncture treatment with individualized setting for reduction of bothersomeness in participants with chronic low back pain (cLBP). SUMMARY OF BACKGROUND DATA.: Low back pain is one of the main reasons of disability among adults of working age. Acupuncture is known as an effective treatment of cLBP, but it remains unclear whether acupuncture is superior to placebo. METHODS: One hundred thirty adults aged 18 to 65 years with nonspecific LBP lasting for at least last 3 months prior to the trial participated in the study from 3 Korean medical hospitals. Participants received individualized real acupuncture treatments or sham acupuncture treatments for more than 6 weeks (twice a week) from Korean Medicine doctors. Primary outcome was change of visual analogue scale (VAS) score for bothersomeness of cLBP. Secondary outcomes included VAS score for pain intensity and questionnaires including Oswestry Disability Index, general health status (Short Form-36), and Beck Depression Inventory (BDI). RESULTS: There were no baseline differences observed between the 2 groups, except in the Oswestry Disability Index. One hundred sixteen participants finished the treatments and 3- and 6-month follow-ups, with 14 subjects dropping out. Significant difference in VAS score for bothersomeness and pain intensity score of cLBP has been found between the 2 groups (P < 0.05) at the primary end point (8 wk). In addition, those 2 scores improved continuously until 3-month follow-up (P = 0.011, P = 0.005, respectively). Oswestry Disability Index, the Beck Depression Inventory, and Short Form-36 scores were also improved in both groups without group difference. CONCLUSION.: This randomized sham-controlled trial suggests that acupuncture treatment shows better effect on the reduction of the bothersomeness and pain intensity than sham control in participants with cLBP.
가족커뮤니케이션과 의복 구매유형에 따른 청소년의 마켓가치 평가 및 구매 영향력 연구
조희라,이선재 한국의류학회 2001 한국의류학회지 Vol.25 No.1
The purpose of this study were to investigate the purchase influence of teenagers in the family by examining the evaluation of market value according to their clothing purchase style. The questionaire survey was carried out 572 high school, and middle school students in Seoul region in Feb., 2000. SPSS package program was used to analyze the gathered data. The results of the research were as follows: 1. Four types of family communication patterns were identified through cluster analyses: laissez-faires, protectives, pluralistics, consensuals. 2. Market values were classified into seven dimensions by factor analyses: user value-psychological value, performance value; payer value-payment convenience value, price value; buyer valuepersonalization value, service value, purchase convenience value. 3. Independent purchase was evaluated higher than joint purchase for the price value and psychological value, while pint purchase marked higher than independent purchase for the performance value, payment convenience value, service value and purchase convenience value. And there were some differences in the results of evaluation among the family communication patterns.