결함 상세를 포함하는 철근콘크리트 전단벽의 수치 모델 에 관한 실험적 평가

전성하,박지훈 한국지진공학회 2016 한국지진공학회논문집 Vol.20 No.4

Reinforced concrete shear walls with deficient reinforcement details are tested under cyclic loading. The deficiency of reinforcement details includes insufficient splice length in U-stirrups at the ends of horizontal reinforcement and boundary column dowel bars found in existing low- to mid-rise Korean buildings designed non-seismically. Three test specimens have rectangular, babel and flanged sections, respectively. Flexure- and shear-controlled models for reinforced concrete shear walls specified in ASCE/SEI 41-13 are compared with the flexural and shear components of force-displacement relation extracted separately from the top displacement of the specimen based on the displacement data measured at diverse locations. Modification of the shear wall models in ASCE/SEI 41-13 is proposed in order to account for the effect of bar slip, cracking loads in flexure and shear. The proposed modification shows better approximation of the test results compared to the original models.

요통환자 80례에 대한 임상적 고찰

전성하,류헌식,장병선,김수현,박희진 대한침구의학회 2007 대한침구의학회지 Vol.24 No.2

Objectives: This study was performed to evaluate the general distribution and the efficacy of oriental medical treatment for low back pain . Methods: The 80 cases of low back pain patients was analyzed according to the distribution of sex ,age, the period of disease, contributing factor, the patient-condition on admission , the symptom on admission, the duration of admission, the reading of the X-ray and the treatment efficacy was evaluated respectively. Results: 1. Female was more than male in the ratio of 1:1.2,and thirties and seventies 25% the most, the acutest phase 46.3% the most, reason unknown 33.8% the most, Grade Ⅲ 50% the most, L.B.P. only 51.3% the most, the day of 6-10 30% the most, compression Fx 30% the most. 2.In the total treatment result, the good was 51.3% ,the excellent 22.5%, the fair 17.5%, the poor 8.8% in order. About 'the effective rate' (the percentage of positive effective treatment cases) of each distribution, the fifties 100% the most, the acutest phase 97.3% the most, the slip down, weight lifting, overuse 100% the most respectively, Grade Ⅲ 97.5% the most, L.B.P. only 95.1% the most, the day of 11-15 100% the most, H.N.P. 93.3% the most. Conclusions: We have known the efficacy of oriental medical treatment for L.B.P. was good and early treatment was better than late treatment and main cause of L.B.P. was degenerative change.

도산서원의 풍수지리적 특성 연구

전성하 한국지역지리학회 2019 한국지역지리학회 학술대회발표집 Vol.2019 No.5

헤어샵 구성원의 셀프리더십이 조직시민행동에 미치는 영향

전성하,이소미,왕신,이용환 국제보건미용학회 2021 국제보건미용학회지 Vol.15 No.1

Organizational citizenship behavior of people working in the industry of hair-beauty can prevent people from escaping from respective organizations as well as contribute to the realization of organizational performance of hair-shops efficiently. The present study aimed to identify the effect of self-leadership of members of hair-shop, the significant factor in regard to the enhancement of organizational performance, upon organizational citizenship behavior. A total of 207 members, working in the franchise hair-shops residing in Busan metropolitan area were selected as subjects of the present study for the survey conducted during the period from April 19 to May 3, 2020, employing the self-administered questionnaire on self-leadership and organizational citizenship behavior. The data collected from the questionnaires were processed by using the SPSS Statistical Package (Ver. 24.0) to attain results of frequency analysis, t-test, ANOVA, post-analysis (Duncan's Method), and multiple linear regression analyses. Level of self-leadership of subjects was 3.75±0.53 points comparing to full-score of 5.0 point, wherein it was the highest from members of average monthly income of 3-million KRW (p<0.05). Level of organizational citizenship behavior was 3.57±0.48 points comparing to full-score of 5.0 point, wherein the level of members of the last educational background of university graduation was the highest points of 3.85±0.58 (p<0.01). The results of multiple linear regression analysis revealed the level of self-leadership as increasing in accordance with increasing level of organizational citizenship behavior (p<0.05). The self-leadership of members, engaging in the industry of hair-beauty, appeared with significant effect on the organizational citizenship behavior. It seems a fair and reasonable compensation system, as well as the training for self-development through systematic educational courses, is necessary for the reinforcement of self-leadership of members working in hair-shops.

속도 추정용 빔포밍 기반 RFID 시스템 성능 분석

전성하,전현무,양훈기,Jeon, Seong-ha,Jeon, Hyeon-mu,Yang, Hoon-gee 한국정보통신학회 2015 한국정보통신학회논문지 Vol.19 No.8

RFID based applications that combine radar techniques to obtain the location and the ID of a tag have widely been investigated. In this paper, we analyze a recently proposed RFID system that can extract the tag IDs and their velocities using signals transmitted from the tag attached moving objects and verify its performance. In the proposed system, a beacon transmits triggering signal at regular intervals into a monitoring area and the tag receiving the triggering signal backscatters the FMCW(frequency modulation continuous wave) signal modulated by the tag ID. The reader system demodulates this FMCW signal using predefined two reference signals to obtain not only the tag ID but its velocity. In this paper, we show that the proposed system works properly and analyze the degree of performance degradation in cases when the synchronization error between the transmitting signal and the reference signal occurs, and even when sampling rate is lowered for implementation purpose. Finally, the analytical results are verified by simulation. RFID 기술에 레이더 시스템을 접목시켜 태그의 아이디 획득뿐만 아니라 위치 정보를 추가로 획득할 수 있는 기술이 최근 많은 주목을 받고 있다. 본 논문에서는 태그가 부착된 이동하는 물체로부터 태그 아이디 및 속도를 추출하는 최근 제안된 RFID 시스템을 분석하고 성능을 검증한다. 제안된 시스템에서는 감시영역으로 진입한 태그가 지상 비콘으로 부터 트리거 신호를 받은 후 태그 아이디 정보를 FMCW 변조한 신호를 리더로 전송하면 리더는 수신 신호를 복조하여 아이디 및 속도를 동시에 획득한다. 본 논문에서는 송신 신호와 기준신호 간의 동기 오차가 발생하는 경우 및 시스템 구현을 위해 샘플링 률을 낮춘 경우 제시된 시스템의 동작 가능성 및 성능 열화 정도를 분석하고 시뮬레이션으로 이를 검증한다.

형법

전성하 고시계사 2010 考試界 Vol.55 No.10

이동 물체의 태깅을 위한 디지털 빔포밍 기반 RFID 시스템

전성하,전현무,신성관,손채봉,양훈기,Jeon, Seong-Ha,Jeon, Hyeon-Moo,Shin, Seong-Gwan,Sohn, Chae-Bong,Yang, Hoon-Gee 한국정보통신학회 2014 한국정보통신학회논문지 Vol.18 No.7

RFID 기술은 태그 아이디 정보 획득이라는 기본적인 역할을 넘어 태그 아이디와 위치 정보를 동시에 획득하는 기술이 개발되고 있으며 최근 들어서는 이동태그의 속도, 방향 등 부가적인 정보도 획득하는 방향으로 발전하고 있다. 본 논문에서는 서로 다른 속도로 이동하는 다수의 태그 부착 물체들에 대한 태그 아이디 획득 및 거리, 속도 등 부가적인 정보를 추출할 수 있는 RFID 시스템을 제안한다. 제안된 시스템에서는 태그는 FMCW로 변조된 아이디 신호를 전송하며 리더는 배열(array) 안테나를 이용해서 방위각 방향으로 태그 신호를 일차 분리하고 이어서 FMCW 복조를 통해서 속도, 거리 외에 태그 아이디를 복조한다. 요구된 기능을 수행하기 위한 리더 수신부 구조를 제시하고 제시된 시스템이 동작 가능함을 이론적으로 분석하며 시뮬레이션을 통해서 제시된 시스템의 성능을 검증한다. RFID technology has evolved from basic operation like the acquisition of tag IDs into a more complicated operation such as the simultaneous acquisition of tag IDs and their positions and recently, is raising the possibility of obtaining additional informations, which include their velocities, directions and distances. In this paper, we present a RFID system that can fullfil aforementioned advanced functions. In the proposed system, a tag transmits a sequence of FMCW pulses modulated by ID signals and a reader separates the tag signals in azimuth direction using an array antenna, followed by the FMCW demodulation from which distances, velocities as well as the tag IDs are extracted. We propose a receiver structure of the reader and theoretically analyze its operability. Moreover, its performance is examined by simulation.

비선형 동적해석에 의해 내진설계된 철근콘크리트 보통전단벽의 지진취약도 분석

전성하,박지훈 한국지진공학회 2019 한국지진공학회논문집 Vol.23 No.3

Seismic performance of ordinary reinforced concrete shear wall systems commonly used in high-rise residential buildings is evaluated. Three types of shear walls exceeding 60m in height are designed by performance-based seismic design. Then, incremental dynamic analysis is performed collapse probability is assessed in accordance with the procedure of FEMA P695. As a result, story drift, plastic rotation, and compressive strain are observed to be major failure modes, but shear failure occur little. Collapse probability and collapse margin ratio of performance groups do not meet requirement of FEMA P695. It is observed that critical wall elements fail due to excessive compressive strain. Therefore, the compressive strain of concrete at the boundary area of the shear wall needs to be evaluated with more conservative acceptance criteria.

철근콘크리트 보통전단벽의 전단력 증폭효과 근사해석

전성하,박지훈,Jeon, Seong-Ha,Park, Ji-Hun 한국지진공학회 2020 한국지진공학회논문집 Vol.24 No.3

An approximate analysis method is proposed to predict the dynamic amplification of shear forces in ordinary reinforced concrete shear walls as a preliminary study. First, a seismic design for three groups of ordinary reinforced concrete shear walls higher than 60 m was created on the basis of nonlinear dynamic analysis. Causes for the dynamic amplification effect of shear forces were investigated through a detailed evaluation of the nonlinear dynamic analysis result. A new modal combination rule was proposed on the basis of that observation, in which fundamental mode response and combined higher mode response were summed directly. The fundamental mode response was approximated by nonlinear static analysis result, while higher mode response was computed using response spectrum analysis for equivalent linear structural models with the effective stiffness based on the nonlinear dynamic analysis result. The proposed approximate analysis generally predicted vertical distribution of story shear and shear forces of individual walls from the nonlinear dynamic analysis with comparable accuracy.

맥문동이 생쥐의 기아 스트레스에 미치는 영향

전성하,백은기,홍의실,박지윤,한지완,임영남,고호연,김동우,전찬용,박종형,한양희,Jeon Sung-Ha,Baek Eun-Ki,Hong Yi-Sil,Park Jhee-Yoon,Han Jhee-Wan,Yim Young-Nam,Ko Ho-Yeon,Kim Dong-Woo,Jun Chan-Yong,Park Chong-Hyeong,Han Yang-Hee 대한한방내과학회 2004 大韓韓方內科學會誌 Vol.25 No.1

Objective : This study was aimed to evaluate the anti-starvation stress effect of Liriopis Tuber on mice. Method : The first experiment was done to mice which have a high corticosterone level at a short term starvation. The plasma corticosterone level of each mouse was measured over time at 12, 24, 36, 48, 72 hours of starvation respectively. The second experiment was done in the two groups(LT A and LT B) of mice which were in famine for 36.5 hours after being administered Liriopis Tuber three times with different doses(LT A: 1.0 g/.kg and LT B: 3.0g/kg) for three days. The plasma corticosterone levels and rectal temperature were measured when a 36.5-hour of starvation period was finished. Results : 1. The corticosterone level in the mice was significantly increased after a 36.5-hour of starvation. (P<0.001). 2. The plasma corticosterone level was decreased significantly in the group of 3.0g/kg, compared to the control group.(P<0.05) 3. The rectal temperature in the groups of 1.0g/kg and 3.0g/kg were increased slightly in both group. But the two groups didn't show significant change. Conclusion: Based on the above results, Liriopis Tuber might have anti-starvation stress effect and it may be used as anti-starvation stress medicine and anti-stress medicine. Conclusion : Based on the above results, Liriopis Tuber might have anti-starvation stress effect and it may be used as anti-starvation stress medicine and anti-stress medicine.