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주동엽,정용준,민범일 東新大學校 1999 論文集 Vol.11 No.-
This study was designed to investigate the effect of natural water and maesil drink, Korean traditional drink, after exercise of maximum of gradual load before 20 minute on the treadmill training. I surveyed 6 mail basketball players of university in order to inverstigate the effects on the exercise spot and analysed the relations of blood variations before and after exercise of maximum of gradual load with a treadmill, and 3 minutes, 5minutes, 10minutes after each recovery step. The results were as follows. 1. Total-Cholesterol, Albumin, Triglyceride, Heart Rate were significant difference in the effects of the two drink at the each group and measuring time(P<.05). 2. Glucose, Total-Protein were no difference in the two group, but measuring time were significant difference(P<.05).
韓龍雲,金重燁,權純益 嶺南大學校 工業技術硏究所 1981 연구보고 Vol.9 No.2
The factors that effect the power output of diesel engine are intake temperature, intake pressure, compression ratio and so on, in constant revolution. Intake pressure and compression ratio of them are much more effective. If the compression ratio is raised, the thermal efficiency of engine increases, but silent driving is difficult for maximum combustion pressure. The durability of engine decreases also for vibration and mechanical strain of materials, and the weight of engine per horse power increases. In this paper an intake pressure in charge of negative effects to lower compression ratio is raised. The compression ratio is decreased through the gasket is replaced by thick copper plate between cylinder and cylinder head. The effect of supercharge is evaluated experimentally from measuring of an engine power output, fuel consumption, and intake air volume. As a result of a decreased compression ratio, it becomes the same as natural aspiration before change compression ratio to increase about 3% to supercharging-pressure change ratio per unit compression ratio in mean effective pressure. And it becomes also the same as natural aspiration before change compression ratio to the increase of supercharging pressure about 1.8% in thermal efficiency. In case the supercharging pressure is much greater than the former to increase intake air pressure, it will give better effects to lower compression ratio than higher compression ratio with natural aspiration.
최용민,주동엽,김홍식 東新大學校 1997 論文集 Vol.9 No.-
The purpose of this study is to analyze the terms, Leisure, Recreation, and Play in an attempt to explain the complex phenomena of the terms. It is achieved by reviewing past literature. The reasons for developing definitions and ways of measuring these terms are to help both the practicing leisure professional and those who study the leisure phenomena. By defining and measuring these terms, we can more accurately predict the consequences and actions of our work as leisure professionals. One can also be provided a better understanding of the phenomena of the terms. For the research methodology, a descriptive study, which is to present a detailed picture of the phenomena hilt does not attempt to test or build theoretical models, was used for this study. On the basis of the results analyzed in the study, findings were made as follows. Leisure can be viewed from a number of different perspectives. Some theorists suggest that leisure is an element of time, whereas others have perceived it as a set of unique activities in which individuals participate. Recreation can be viewed as a wholesome activity in which individuals participate in their leisure time. Recreation is a more commonly used and understood term among the general public than either leisure or play. Play is an exceedingly interesting, yet diverse and different topic to identify. Many theories have emerged to describe play. However, today it has no generally accepted explanation or definition. Unfortunately, confusion interpreting leisure, recreation, and play was found in this study. Based on the results of this study, this researchers offer one possible view of the terms for the further studies. The new terms defined are provided.
Structural Analysis of Mo/Si EUV Reflector by optical Modeling
In Yong Kang,Yong-Chae Chung,Chan-Yeup Chung,Jinho Ahn,Seung Yoon Lee,Taegeun Kim 한국물리학회 2003 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.43 No.51
The performance of a multilayer extreme ultraviolet (EUV) re ector has direct bearing on the process throughput and the cost of new technology. Using measured data from a real, manufactured re ector, we intended, in this work, to show that the re ectivity of the Bragg re ector can be factorized by using structural parameters such as the d-spacing, density, inter-diusion layers, and oxidation layer. This quantitative analysis of the re ectivity derived from the structural parameters can be utilized to optimize the optical properties of the existing Mo/Si system and to provide fundamental insights into the science involved in a Bragg EUV refl ector.
Ha, Sung Yong,Kim, Hee Jin,Nam, Sungmo,Oh, Seong Yong,Lim, Changhwan,Kim, Il Gon,Yoo, Dong Sun,Park, Sang Yeup 한국물리학회 2014 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol. No.
A novel and simple microwave-assisted hydrothermal method for synthesizing high-quality TiO2/CdS nanocomposites was developed using TiO2 (P-90), CdCl2, and mercaptopropionic acid (MPA). The optical properties and the physical characteristics of the synthesized TiO2/CdS nanocrystals (NCs) depended on the conditions of microwave irradiation. Samples prepared with the same concentration of precursor were treated at different temperatures from 150 A degrees C to 250 A degrees C by using the microwave power. Consequently, the crystal structure of TiO2/CdS transformed from cubic to hexagonal. Transmission electron microscopy and energy-dispersive X-ray spectroscopy techniques confirmed that the fabricated TiO2/CdS were composed of heterogeneously bonded nanostructures. Analysis of the optical properties showed that the UV absorption spectra had a strong red-shift when the microwave heating temperature increased, which caused an increase in the size of the CdS NCs. The mean radius of the CdS NCs combined with TiO2 tended to increase from 3.7 nm to 13.1 nm. Photoluminescence (PL) measurements were used to investigate the PL peak of the fabricated TiO2/CdS under microwave irradiation at 250 A degrees C, and they revealed a 24 nm Stoke's shift from the absorption peak.
맞춤형 BCI시스템을 위한 STFT와 PSO를 이용한 ERS특징 추출
김용훈(Yong-Hoon Kim),김준엽(Jun-Yeup Kim),박승민(Seung-Min Park),고광은(Kwang-Eun Ko),심귀보(Kwee-Bo Sim) 한국지능시스템학회 2012 한국지능시스템학회논문지 Vol.22 No.4
본 논문에서는 사지가 마비되어 신체를 움직이지 못하지만 뇌의 기능은 정상적인 대 마비 환자들을 위한, 생각만으로 외부의 장치를 제어할 수 있도록 하는 BCI(Brain-Computer Interface) 시스템 제어기술을 연구하였다. 사지를 움직이는 상상을 할 경우, 뇌의 운동감각 피질 영역에서 발생하는 뮤리듬(μ8-12㎐)에서 증가되는 신호의 패턴인 Event-Related Synchronization (ERS)를 Short-Time Fourier Transform (STFT)과 Particle Swarm Optimization (PSO)를 이용하여 검출 하는 방법을 시도 하였다. ERS는 사람마다 다른 주파수 영역에서 발생하며, 본 논문에서는 ERS가 가장 많이 발현되고 전압이 큰 주파수를 검출하기 위해 8-12㎐ 주파수영역의 EEG평균에서 PSO를 이용하여 가장 큰 진폭을 가지는 주파수를 확인 한 후, 해당 주파수를 사용하여 C3, C4채널에서 동작 상상 시 나타나는 ERS의 특징을 PSO를 이용하여 찾는 것이며. 개개인 마다 다른 주파수 영역에서 나타나는 ERS의 특징을 가장 많이 발현되는 주파수영역으로 고정하여 움직임 분석을 시도 하였다. 실험 결과에 사용된 data는 BCI competition Ⅳ data set의 실험자 b data를 사용 하였고, 하나의 주파수 대역만을 사용한 결과 왼손 40%, 오른손 38% 검출 정확도를 보였다. This paper presents a technology for manipulating external devices by Brain Computer Interface (BCI) system. Recently, BCI based rehabilitation and assistance system for disabled people, such as patient of Spinal Cord Injury (SCI), general paralysis, and so on, is attracting tremendous interest. Especially, electroencephalogram (EEG) signal is used to organize the BCI system by analyzing the signals, such as evoked potential. The general findings of neurophysiology support an availability of the EEG-based BCI system. We concentrate on the event-related synchronization of motor imagery EEG signal, which have an affinity with an intention for moving control of external device. To analyze the brain activity, short-time Fourier transform and particle swarm optimization are used to optimal feature selection from the preprocessed EEG signals. In our experiment, we can verify that the power spectral density correspond to range mu-rhythm(μ8~12㎐) have maximum amplitude among the raw signals and most of particles are concentrated in the corresponding region. Result shows accuracy of subject left hand 40% and right hand 38%.