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심현진,한창연,남현우,Sim, Hyeon-Jin,Han, Chang-Yeon,Nam, Hyeon-U (사)한국토질및기초기술사회 2006 지반과 기술 Vol.3 No.3
The optimum blasting pattern to excavate a quarry efficiently and economically can be determined based on the minimum production cost, which is generally estimated according to rock fragmentation. Therefore, it is a critical problem to predict fragment size distribution of blasted rocks over an entire quarry. By comparing various prediction models, it can be ascertained that the result obtained from Kuz-Ram model relatively coincides with that of field measurements. Kuz-Ram model uses the concept of rock factor to signify conditions of rock mass such as block size, rock jointing, strength and others. For the evaluation of total production cost, it is imperative to estimate 3-D spatial distribution of rock factor for the entire quarry. In this study, a sequential indicator simulation technique is adopted for estimation of spatial distribution of rock factor due to its higher reproducibility of spatial variability and distribution models than Kriging methods. Further, this can reduce the uncertainty of predictor using distribution information of sample data. The entire quarry is classified into three types of rock mass and optimum blasting pattern is proposed for each type based on 3-D spatial distribution of rock factor. In addition, plane maps of rock factor distribution for each ground level are provided to estimate production costs for each process and to make a plan for an optimum blasting pattern.
안검경련(眼瞼痙攣)을 중풍 전조증상이라 할 수 있는가?
정기용,고호연,정승민,하유군,주재홍,정희,최유경,김동우,한창호,고성규,조기호,박종형,전찬용,Jung, Ki-yong,Go, Ho-yeon,Jeong, Seung-min,Hsia, Yu-chun,Jew, Jae-hong,Jung, Hee,Choi, You-kyung,Kim, Dong-woo,Han, Chang-ho,Ko, Seung-gyu,Cho, Ki-ho 대한중풍순환신경학회 2006 대한중풍.순환신경학회지 Vol.7 No.1
Objectives : The purposes of this study were to investigate that a blepharospasm means the presymptom of stroke based on the traditional hypothesis in the oriental medicine and to compare a blepharospasm with warning signs of stroke in the western medicine. Methods : In the time period Oct. 2005 to Oct. 2006, 409 patients with a first-ever stroke admitted in the department of Internal Medicine of Kyungwon University In-cheon Oriental Medical Hospital, Kyunghee University Oriental Medical Hospital, Dongguk Il-san Oriental Medical Hospital were included. Patients were hospitalized within 14 days after the onset of stroke. Stroke patients were interviewed by residents who studied standard operation procedures in Fundamental Study for Standardization and Objectification of Differentiation and Pattern Identification of Syndrome of Oriental Medicine for Stroke. A questionnaire was completed by a question-and-answer form between patients and residents after explanation details to patients and the agreement of patients. Results : Age, care of patients or grandson, diabetes mellitus, and smoking were higher among cerebral infarction group, while smoking was higher among hemorrhage group. Female, young age, hyperlipidemia, hypertension in the family history and fat body in waist-hip ratio were higher among patients undergoing the blepharospasm before stroke onset. And the incidence of blepharospasm was lower in patients who dislike the fast food. Finally, when we compared a blepharospasm with warning signs of stroke in the western medicine, the incidence of blepharospasm in this study were the most frequent. Conclusion : In this study, the incidence of blepharospasm in patients before stroke onset was more frequent than that of warning signs in the western medicine. But more data from prospective cohort studies should be collected to be accepted that the blepharospasm is the presymptom of stroke as like warning signs in the western medicine.