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송주헌,소수현,임희창 대한조선학회 2016 International Journal of Naval Architecture and Oc Vol.8 No.4
Given the rapid progress made in understanding the dynamics of an offshore floating body in an ocean environment, the present study aimed to simulate ocean waves in a small-sized wave flume and to observe the motion of a cylindrical floating body placed in an offshore environment. To generate regular ocean waves in a wave flume, we combined a wave generator and a wave absorber. In addition, to precisely visualise the oscillation of the body, a set of light-emitting diode illuminators and a high-speed charge-coupled device camera were installed in the flume. This study also focuses on the spectral analysis of the movement of the floating body. The wave generator and absorbers worked well to simulate stable regular waves. In addition, the simulated waves agreed well with the plane waves predicted by shallow-water theory. As the period of the oncoming waves changed, the movement of the floating body was substantially different when tethered to a tension-leg mooring cable. In particular, when connected to the tension-leg mooring cable, the natural frequency of the floating body appeared suddenly at 0.391 Hz as the wave period increased.
MANAGEMENT TREND - 지속가능경영에 기여하는 HR
송주헌,Song, Ju-Heon 한국시멘트협회 2013 시멘트 Vol.198 No.-
지속가능경영에 대한 기업들의 관심과 노력이 증가하고 있는 가운데, 구성원들에게 지속가능경영을 내재화 시키고 보다 장기적 관점의 인적자원관리로 기업의 지속적 성장에 기여하는 '지속가능 인적자원관리'(Sustainable Human Resource Management)가 새롭게 주목 받고 있다. 여기서는 LG경제연구원 원지현 선임연구원의 '지속가능경영에 기여하는 HR' 보고서를 통해 글로벌 기업들의 사례를 분석하고 지속가능 HRM의 특징과 적용 범위, 효과에 대해 알아본다.
구개측 굴곡파절이 있는 상악 구치의 교합면 마모 양상에 대한 연구
송주헌,김희중,이경제 대한턱관절교합학회 2019 구강회복응용과학지 Vol.35 No.3
Purpose: Aims to analyze the occlusal wear patterns in maxillary posterior teeth with palatal side abfractions and study the association between occlusal force and abfractions. Materials and Methods: This study was conducted in a total of 308 teeth from 148 patients with palatal side abfractions in maxillary posterior teeth. The occlusal wears in maxillary premolars and molars with palatal side abfractions were classified and recorded. The classification was done by type of teeth, age, and gender, and in order to evaluate the statistical significance between groups, chi-square test was conducted (α = 0.05). Results: Palatal side abfractions in maxillary posterior teeth were observed at the highest frequency in the 1st molars, and in all teeth with palatal side abfractions, more than one occlusal wear was observed. In classification by type of teeth, by age, and by gender, the occlusal wears in teeth with palatal side abfractions were observed at high frequency in cuspal inclined plane, central fossa, and marginal ridge, and there was a statistical significance (P < 0.05). Conclusion: Palatal side abfractions were observed at the highest frequency in maxillary 1st molars, and in all maxillary posterior teeth where palatal side abfractions were found, the occlusal wears were observed. And the occlusal wears were observed at high frequency in cuspal inclined plane, central fossa and marginal ridge. Such results show that abfraction is associated with occlusal force.
MANAGEMENT TREND - 구성원들의 부정적 감정, 전염성 높다
송주헌,Song, Ju-Heon 한국시멘트협회 2012 시멘트 Vol.195 No.-
사람의 감정은 전염된다는 특성이 있다. 특히 부정적인 감정의 경우 그 전염성이 강하다. 조직 내에서 부정적인 감정이 형성되고 확산되면 성과 저하 등 조직 내 악영향을 미칠 수 있다. 따라서 조직 내 부정적인 감정의 근원지를 찾아내고 확산을 막기 위한 다양한 노력을 기울일 필요가 있다.