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권휴상(Kwon, Hyu-Sang),박성철(Park, Seong-Chol),조승현(Cho, Seung-Hyun),이승석(Lee, Seung-Seok),김진연(Kim, Jin-Yeon) 한국소음진동공학회 2009 한국소음진동공학회 논문집 Vol.19 No.1
This paper describes a general approach for processing data from an omni-directional guided wave transducer array for the rapid inspection of large plate structures. A basic phased array algorithm is presented that can be applied to any array geometry. For guided waves on plate, beam steering algorithm is derived and the corresponding beam pattern is analyzed. The algorithms are applied to simulation and experimental data. The results show well its usefulness in structural applications.
김하석,이정재,김란,정양권,송철 조선대학교 생산기술연구소 1993 生産技術硏究 Vol.15 No.1
One threshold value edge detection may fail to detect edges in the region whose gray level varys insignificantly. The region where some edge exist is supposed to have histogram composed of two approximally normal distributions. In this paper we segmented the regions such that its histogram may have one valley, then optimal threshold value can determined with the means and variances of the two supposedly normal distributions to detect insignificant edges.
Burdens, Needs and Satisfaction of Terminal Cancer Patients and their Caregivers
Chang, Yoon-Jung,Kwon, Yong Chol,Lee, Woo Jin,Do, Young Rok,Lee, Keun Seok,Kim, Heung Tae,Park, Sook Ryun,Hong, Young Seon,Chung, Ik-Joo,Yun, Young Ho Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.1
Objectives: Terminal cancer patients and their caregivers often experience traumatic stress and need many types of assistance. In the present study we interviewed terminally ill cancer patients and caregivers to determine how much burden they experienced and to find out what factors are most important for satisfaction. Design: We constructed a questionnaire including overall care burden and needs experienced, and administered it to 659 terminal cancer patients and 659 important caregivers at 11 university hospitals and 1 national cancer center in Korea. Results: Finally, 481 terminal cancer patients and 381 caregivers completed the questionnaire. Care burden was not insubstantial in both and the caregiver group felt more burden than the patient group (P<0.001). While the patient group needed financial support most (39.0%), the caregiver group placed greatest emphasis on discussion about further treatment plans (44.8%). Stepwise multiple logistic regression analyses showed that in the patient group, patient's health status (OR, 2.03; 95%CI, 1.16-3.56) and burden (OR, 2.82; 95%CI, 1.76-4.50) influenced satisfaction about overall care, while in the caregiver group, high education level (OR, 1.84; 95%CI, 1.76-4.50), burden (OR, 2.94; 95%CI, 1.75-4.93) and good family function (OR, 1.94; 95%CI, 1.24-3.04) were important. Conclusions: Our study showed that burden was great in both terminal cancer patients and their caregivers and was perceived to be more severe by caregivers. Our study also showed that burden was the factor most predicting satisfaction about overall care in both groups.