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신동철,이승창,조영상,Shin, Dong Cheol,Lee, Seung Chang,Cho, Young Sang 한국강구조학회 2003 韓國鋼構造學會 論文集 Vol.15 No.4
구조 설계를 위해 초기 부재를 가정할 때나 건축 실무에서 개산 견적을 계산할 때 기술자의 직관이나 비슷한 조건의 기존 설계 평균값을 사용하고 있으나 설계 조건은 모두 다르기 때문에 큰 오차가 발생할 수밖에 없다. 이러한 문제점을 해결하기 위해서 확률론적인 절차가 내재되어 있어 불확실성을 다룰 수 있는 인공 신경 회로망의 이용하여 와렌 트러스를 설계하므로써 적용성을 평가하였다. 제안된 신경망 설계변수값와 구조설계 단계에 따라 다양한 와렌 트러스를 설계하여 MIDAS 프로그램 설계결과의 10% 오차 이내로 근사 설계를 하므로써 모델의 타당성을 검증하였다. 제안된 모델은 약간의 오차를 포함하지만 적은 시간과 노력으로 신뢰할 수 있는 설계 결과를 얻을 수 있으며, 부재 테이블을 사용하는 비선형 관계의 구조설계에도 적용 가능한 특성을 가지고 있다. Most engineers tend to rely on their intuition or existing data in formulating structural design or preliminary estimate of various conditions. Because of these variations, the artificial neural network is used as an alternative design model of the warren truss since it can handle uncertainty through the probability method. This research validated the approximate structural design model of the warren truss, with its proper parameter values of the neural network and design process falling within 10 percent torrence of the different designs that resulted between this model and the MIDAS program. The suggested model for the process was adapted for the truss design using the member section table, while time saving and efficiency are based on the allowed range of torrence.
등방성체용 동적 광탄성 하이브리드 법 개발에 관한 연구
신동철,황재석,Sin, Dong-Cheol,Hwang, Jae-Seok 대한기계학회 2000 大韓機械學會論文集A Vol.24 No.9
In this paper, dynamic photoelastic hybrid method is developed and its validity is certified. The dynamic photoelastic hybrid method can be used on the obtaining of dynamic stress intensity factors and dynamic stress components. The effect of crack length on the dynamic stress intensity factors is less than those on the static stress intensity factors. When structures are under the dynamic mixed mode load, dynamic stress intensity factor of mode I is almost produced. Dynamic loading device manufactured in this research can be used on the research of dynamic behavior when mechanical resonance is produced and when crack is propagated with the constant velocity.
신동철,김수한,정희성,우정현 대한신경외과학회 1982 Journal of Korean neurosurgical society Vol.11 No.4
A rare case of intramedullary neurilemmoma of the spinal cord has been reported. A 23-year-old woman was admitted to our hospital, on 4th July, 1982, because of weakness of legs and difficulty of urination. Neurological examination revealed motor weakness of the both lower extremities with muscle atrophy. Sensory examination showed hypesthesia below the level of L3 dermatome of the right side and of L4 dermatome of the left. All deep tendon reflexes of the lower extremities were abolished and Lasegue's sign was not appeared. Manometric Queckenstedt's test showed a complete block, with CSF protein of 460㎎/㎗. Pantopaque myelogram demonstrated a complete block at the midportion of L1 spine. Total removal of the intramedullary tumor which was located in the dorsal column of the thoracolumbar segment was performed. The tumor was 4.0×1.5×1.0㎝ in size and it proved to be an Antoni-A typed neurilemmoma histologically. Only 20 similar cases have been published so far and summarized on Table 1, including our case. The relevant literature was reviewed.
실업계 고등학교 건축과 건축설계제도 담당교사의 교과목 인식에 관한 연구
신동철 경원전문대학 2002 論文集 Vol.24 No.-
This paper is on the Industrial Highschool teacher's recognition of Architectural Drawing Subject In Kyunggi Province. As results, they almost agree that Architectural Drawing Subject is the most important one in Architectural Education Procedure. Teachers recognize the teaching subject matters and methodology should be standardized, but they don't have the objective education materials and matters in practical classes. Because of want of getting opportunities on the Architectural Drawing Subject, teachers need to get chances of training education materials and methodology of it's course. Also, majority of them provoke the need of educational continuance to obtain the fruitful education result between high schools and colleges. Therefore, we must prepare the National Standardization of Architectural Drawing Matters and Methodology, and study the program of educational connection in order to develop students abilities.
신동철 경원전문대학 2001 論文集 Vol.23 No.-
With the trend toward network in all engineering domains, there are efforts that enable users to exchange data among different commercial packages by utilizing STEP. To realize collaborative architectural design using STEP, we need implementation of database for much STEP data over the network architecture and among different hardware platforms. The main objectives of CIS/2 database proposed in this paper are to share and to store effectively CIS/2 data produced by each of structural design modules within the distributed computing environment. Mapping CIS/2 entity to table, SQL statements for implementation of CIS/2 database and connection module for each of structural design modules using JAVA are the main components.
신동철,김태규,Dae-Weon Kim 대한기계학회 2020 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.34 No.4
Piezoelectric material has widely used in various applications with its high liable performance and quite smart electro-mechanical characteristics. However, solutions for number of troubles in strength and behavior of fracture have not sufficiently clarified yet. Among these associated solutions, the double torsion (DT) technique is the particular and effective method to measure toughness of fracture and growth behavior of slow crack in ceramic material. From the results of this work, it obtained the practical feasibility of the DT technique for finding growth behavior of crack initiated by kinds of cyclic electric fatigue on piezoelectric ceramics, and found that the initiated crack is able to propagate by using a relatively lower cyclical voltage than before cases under a constant mechanical load if the DT technique is used. In this study, it is also established the experimental method of the crack propagation by cyclic electric fatigue for the piezoelectric ceramics using DT technique, and found the possibility of the power law based on the classical Paris’ equation for analyzing the result of electric fatigue crack test.