• 한국인터넷방송통신학회논문지
• /
• 제15권3호
• /
• pp.91-98
• /
• 2015

제한된 스펙트럼 자원의 효율적 사용을 위한 하나의 해법으로 GPS 시각 기반의 이동선형주파수변조(SLFM)를 갖는 동일채널 다중국소 레이더 운용을 위한 방법을 제시한다. 제안된 알고리즘은 선택된 SLFM 신호 중에 상호상관 특성으로부터 허용할 수 있는 최소상관 수준을 갖는 SLFM 후보군을 찾는다. 제안 방법의 검증을 위해 단일 톱니 또는 삼각 LFM 신호를 갖는 동일채널에 운용되는 수 개의 레이더에 대해 수치해석을 하였다. 간섭 및 잡음, 알고리즘 한계, 그리고 SLFM 신호의 시각 동기 오류에 대해 탐지 거리 및 거리 윤곽의 계산 결과를 고찰하였다.

• 한국운동역학회지
• /
• 제20권3호
• /
• pp.303-310
• /
• 2010

The purpose of this study was (a)to compare electromyographic (EMG) activities and physiological variables on the development of fatigue induced by ergometer test, (b)to determine investigate the differences in the stage of fatigue between the electromyographic characteristics and physiological variables. Nine male university students who have no musculoskeletal disorder were recruited as the subjects. The electromyographic characteristics(peak IEMG, average IEMG, median frequency, mean edge frequency) and physiological variables(HR, RPE, blood lactate) were determined for each stage(15, 30, 45, 60 minutes, all out). For each dependent variable, one-way analysis of variance(ANOVA) with repeated measures and correlation analysis were performed to test if significant difference existed(p<.05). The results showed that peak IEMG, average IEMG from low extremity and physiological variables were significantly increased during the all-out stage. EMG parameters in VL, VM show significantly correlation with physiological variables during whole stages. This indicated that IEMG values may be proper parameters to determine muscle fatigue rather than physiological variables.

• 한국해양공학회지
• /
• 제23권1호
• /
• pp.114-121
• /
• 2009

In this study, acceleration responses of caisson structures under various environmental conditions are experimentally examined as a basic study to develop the health assessment technique for harbor structures. To achieve the objective, three approaches are implemented. Firstly, a target caisson structure is selected and its small-scaled caisson is constructed in the laboratory. Secondly, a finite element model of the caisson is generated to identify dynamic responses of the baseline structure. Thirdly, experimental tests are performed on the caisson model to examine dynamic responses under various boundary conditions and impact locations. Four different boundary conditions, 'standing on concrete floor', 'standing on styrofoam block', 'standing on sand-mat' and 'hanging by crane', are considered and correlation coefficients of frequency response functions between four states are analyzed.

• 한국전문물리치료학회지
• /
• 제25권3호
• /
• pp.27-38
• /
• 2018

Background: At present time, smartphones have become very popular and powerful devices, and smartphone applications with the good validity have been designed to assess human balance ability. Objects: The purpose of this study is to evaluate the feasibility of smartphone acceleration in the assessment of postural control ability for six different conditions. Methods: Twenty healthy college-aged individuals volunteered. Static balance ability was measured twice with one-day interval using smartphone application and 3D motion capture system under the six different conditions. Results: Dominant frequencies for each test condition did not show significant differences except for two conditions. The intra-rater correlation coefficient between the first and second tests showed high correlations in six conditions(r>.70, p<.05). Smartphone acceleration and the acceleration calculated from the 3D marker position data showed high correlation coefficient(r>.80, p<.001). Conclusion: Acceleration recorded from a smartphone could be useful assessment variables for balance test in the clinical field.

• 한국정보전자통신기술학회논문지
• /
• 제8권3호
• /
• pp.203-213
• /
• 2015

본 연구 목적은 유치원 행정업무담당자의 직무스트레스와 스트레스대처 방안을 파악하고자 한다. 연구 대상은 경상남도 ${\bigcirc}$시에 소재하는 유치원 행정업무담당자 119명을 대상으로 2014년 9월 10일부터 12월 20일까지 설문조사를 실시하였다. 분석방법은 SPSS WIN 18.0프로그램을 이용하여 빈도분석, t-test, 상관분석, 다중회귀분석을 실시하였다. 분석결과는 인구사회학적 특성에 따른 연령, 결혼유무, 종교, 직급 등 요인별 차이가 있었다. 둘째, 상관관계에서 스트레스 대처방안의 하위변수인 경험자의 조언, 문제 상항에 대한 방어기제는 부적 상관이 있었다. 셋째, 회귀모형에서 직무스트레스와 음주회수, 직급이 통계적으로 유의미한 요인으로 나타났다. 본 연구는 유치원 행정업무 담당자의 업무 개선을 위한 기초자료가 될 것으로 판단된다.

• 한국식생활문화학회지
• /
• 제23권2호
• /
• pp.163-171
• /
• 2008

The purpose of this study was to measure employee ‘awareness’ and ‘practice’ of business ethics in the foodservice industry, and to determine possible correlations between these two variables. Self administrated questionnaires were completed by 1003 employees and data were analysed to ascertain frequency, factor, reliability, correlation and canonical correlation. Two factors were obtained from factor analysis of business ethics(BE) awareness; “Organizational awareness”, and “Individual awareness”. Similarly, two factors were also obtained for business ethics practice; “Systematic practice”, and “Compensatory practice”. Canonical correlation analysis produced two significant functions. For canonical function 1, it was found that organizational awareness of BE was positively correlated with systematic practice. For canonical function 2, it was found that individual awareness of BE was negatively correlated with the compensatory practices of BE. The findings of this study demonstrate that higher organizational awareness of business ethics in the foodservice industry led to higher systematic practices of BE, while higher individual awareness of BE led to lower compensatory practices of BE. In conclusion, higher organizational awareness of BE places a higher priority on building an external system from an institutional perspective, while higher employees awareness of BE leads to higher expectation from the company, resulting in relatively low compensatory practices.

• 한국치위생학회지
• /
• 제11권5호
• /
• pp.741-747
• /
• 2011

Objectives : The purpose of this study was to examine factors related to the satisfaction level of patients with dental hygienists services. Methods : Questionnaire survey was carried out targeting 157 dental hygienists. The collected data was performed frequency & percentage, independent t-test and Pearson's correlation coefficient analysis. Results : 1. The mean score of kind of dental hygienists was 3.07 out of a maximum 4 points and level medical treatment of dental hygienists 2.94, friendly of dental hygienists 2.75. 2. Regarding the correlation between kind, level medical treatment, friendly of dental hygienists had a statistically significant correlation of r=0.677 which was the highest correlation factor(p<0.01). 3. dental satisfaction, dental reuse intention between intention recommendation, they were statistically significant different with dental satisfaction(p<0.05) 4. Regarding the correlation between dental satisfaction, dental reuse intention, intention recommendation had a statistically significant correlation of r=0.705 which was the highest correlation factor(p<0.01). Conclusions : Dental care service, dental hygienists have significant and their to revisit and recommend.

• 한국정보통신학회논문지
• /
• 제13권2호
• /
• pp.253-260
• /
• 2009

본 논문에서는 UWB 펄스 신호를 주파수 성분으로 분리해서 수 MHz정도의 ADC로 디지털 구현이 가능한 새로운 구조의 TR-UWB 시스템의 성능을 수학적으로 분석한 후 기존 시스템과 이론적으로 비교한다. TR-UWB 신호의 주파수 변환 특성 및 복소수 성분들의 평균, 분산 값을 유도하여 이를 활용한 이론적인 SNR 계산을 통해 시스템 성능을 분석하고 SNR 비 관점에서 기존 시스템과의 성능을 비교한다. 모의 실험에서는 AWGN 환경과 IEEE 802.15.3a의 다중경로 채널 환경에서의 BER을 통해 제시한 TR-UWB 시스템의 성능이 기존 시스템보다 우수함을 보인다.

• 한국가정과교육학회지
• /
• 제12권1호
• /
• pp.1-9
• /
• 2000

The purpose of this study was to analyse the relationship between behaviors of the video game(frequency, time career) and related variables in middle and high school boys. The data were collected using questionnaires from 342 boys. The major results of this study are summarized as follows : (1) A correlation between the frequency and the time of video game was significant. but correlations between the career and the frequency. the time of video game were not significant. (2) The frequency of video game showed significant relationship with place. preference formation, relative preference. and parents involvement. The time of video game showed significant relationships with place. preference formation, relative preference, and cost. The career showed significant relationship with place and cost.

• 재활복지
• /
• 제22권4호
• /
• pp.59-81
• /
• 2018

본 연구는 재활병원에 종사하는 종사자를 대상으로 직무만족도 분석을 하여 스포츠 활동의 참여가 직무에 어떠한 영향을 미치는지 알아보기 위한 것이다. 이를 위해 2015년 4월부터 5월까지 8개의 부산광역시 재활병원소속 간호사, 간호조무사, 물리치료사, 작업치료사, 행정직으로 종사자를 선정 후, 400부의 설문지를 배포하여 분석하였다. 분석방법으로 t-검정, 빈도분석(frequency analysis), 탐색적 요인분석(exploratory factor analysis)과 Cronbach's ${\alpha}$분석, 일원배치 분산분석(one-way ANOVA), 사후검증(Duncan)을 실시하였고, 상관관계(correlation analysis)와 회귀분석(regression analysis)을 이용하였다. 연구결과는 다음과 같다. 스포츠 활동 참여 형태에 따른 직무만족도 차이 검정 결과 운동시간, 운동빈도, 운동종목 그리고 운동기간 등 모든 요소에서 유의한 차이가 나타났고 운동시간과 운동빈도가 많고 운동경력이 높을수록, 운동종목의 경우 아쿠아로빅과 에어로빅 종목을 참여하였을 때 직무만족도가 높아진 것으로 분석되었고, 회귀분석 결과에서는 직무만족도 하위 5개 요인 중 자기평가성, 이직성향, 직무몰입 그리고 직무만족에서 정의 영향을 미치는 것으로 나타났고 참여빈도에서는 유의한 차이가 나타나지 않았으며 참여빈도에서는 부의 영향을 미치는 것으로 나타났다. 결론적으로 스포츠 활동참여가 재활병원 종사자들의 직무만족도에 긍정적인 영향을 미치는 것으로 나타났고, 본 연구를 종합적으로 분석해 볼 때, 재활병원 내 직원 구성원들의 스포츠 동호회 활동과 체육시설 설치 그리고 운동시간에 대한 할애 등 지원을 통해 업무능률 향상과 활기찬 직장 분위기를 만들 수 있으므로 적극적으로 스포츠 활동을 장려해야 할 것으로 사료된다.