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조지훈,박찬수 한국경영학회 2007 한국경영학회 통합학술발표논문집 Vol.2007 No.8
본 연구에서는 포털 사이트에서의 키워드 검색과 판매량간의 관계를 분석하여 검색의 판매효과를 규명하는 데 그 목적을 두었다. 분석을 위해 광고비와 검색건수, 그리고 판매량간의 관계를 추정하기 위한 2단계 모형을 설정하고, 이동통신, 초고속인터넷, 자동차 시장을 대상으로 추정하였고 그 결과를 대안모형과 비교, 분석하였다. 분석 결과 2단계 모형은 기존제품보다는 신제품에서 대체로 유의한 결과를 나타내었고, 대안모형은 그릇된 결론으로 유도할 수 있음을 발견하였다.
다양한 강도와 주파수의 자기촉감자극에 의해 유발되는 인지 특성 평가
조지훈,김형식,최미현,정순철 한국감성과학회 2019 춘계학술대회 Vol.2019 No.-
This study compared the personal characteristics about tactile cognition induced by magnetic field of various intensities and frequencies, and conducted to investigate that magnetic tactile stimulator can be evoked various tactile feeling. For the experiment, the magnetic tactile stimuli of three intensities(Lev1, 2, 3) and four frequencies(10, 20, 30, 50Hz) and this combined twelve parameter was presented to the center of right hand palm of 19 adult male (22.9±2.28 years). In this case, each intensity setted to the distance between the center of palm and the electromagnetic coil where the magnetic field is generated, each setting is Lev1 = 3cm, Lev2 = 2cm, Lev3 = 1cm. Subjects asked to evaluate the feeling of the magnetic tactile stimuli to choose the word from ‘Tickling’, ‘Trembling’, ‘Pushing, Pushing, Pressing', ‘Tingling’, ‘Tapping’, ‘Stinging’, ‘Stiffing’, ‘Percuss', ‘Blunt’ and the strength as 5 point scale (1 : no stimulation ~5 : strong stimulus). In result, the words that showed the statistical significant difference in intensities and frequencies were ‘Trembling’(p<.001, p=.003), ’Tapping’(p=.006, p=.003), and performed the main effect analysis because these wards also showed interaction effect(p=.044, p=.051). As a result, ‘Trembling’ and ‘Tapping’ had significantly higher point of strength when the case of each ‘Lev3, 30Hz’(p<.001, p=.022) and ‘Lev3, 10Hz’(p=.005, p=.044). In this study, In spite of low frequency range, it evoked the two different type of tactile cognition separately, and It’s predicted that more cognitive characteristics will be shown when the parameters of Lev3 intensity and higher than 30Hz.
중년 남성의 360o 척추고정술 후 척추안정화 운동이 근육동위효소 및근 단면적에 미치는 영향
조지훈,홍지영 한국발육발달학회 2016 한국발육발달학회지 Vol.24 No.4
The subjects include 10 middle-aged men (exercise group: 5, control group; 5) who had 360o Spinal Fusion with instability. The exercise group performed spine stabilization exercise 2 times a day, and exercise program was composed of 5-minute warm-up, 10-minute main exercise and 5-minute cool-down. The investigator measured Isoenzymes, Cross-sectional Area for effect of spine stabilization exercise. A two-way repeated measures ANOVA revealed significant interaction effects between group and time on CPK-MM. Additionally there were also significant main effects of CPK-MM. There were also significant main effects of measurement time on LDH-4. There were no changes in right multifidus and left multifidus. For right psoas major, there were significant interaction effects between group and time and significant main effects of measurement time. There were significant main effects of group on left psoas major. The findings show that the spine stabilization exercise program is effective to isoenzymes and cross-sectional Area change of patients with 360o spinal fusion. Especially, it has a positive effect on recovery of injured muscle during post-operative rehabilitation. Therefore, it is applicable into clinical settings.