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中央部에 矩形缺損部가 있는 3邊固定 1邊自油인 矩形板의 휨 應力變化에 關한 實驗的 硏究
盧瀅柱,李澤雲 嶺南大學校 工業技術硏究所 1988 연구보고 Vol.16 No.1
The importance of stress analysis increases as the new concepts of structural forms and construction materials are developed. Functional considerations in the design often dictate the placing of the openings of various dimensions in the floor system. The current paper experimentally analyzes stress distribution in the rectangular plate with rectangular opening in the middle with emphasis placed on qualitative rather than quantitative observation. The following results are observed: 1. For the large opening, only negative Mx develops whose distribution is similar as in a cantilever. 2. As the dimension of the opening becomes the larger in the y-direction, the larger negative moment develops. 3. Mx at the built-in edge is the largest at 1.5 times the value obtaining at the opening ratio α₃/α₁=3.
非整列 기둥 配置上에 있는 無梁平面板의 應力에 대한 硏究
盧瀅柱,尹承鉉 嶺南大學校 工業技術硏究所 1987 연구보고 Vol.15 No.2
Flat plate floor system is more economical and adaptable than Bearing wall-or Beam supported floor systems or Flat slab system. Most of today's Flat plate system has regular column layout, the diversity of the spatial and functional requirements of building design often calls for irregular column layout. Such layout remains of no practical use for want of theoretical research. This paper is to analyze the flat plate system with irregular column layout by experiment and Finite Differences Method. The authors resort to the displacement freezing method for out-of-plane displacement measurements and to the relative equation between displacement and bending moment to determine bending moments at arbitary points.
盧瑩住,權泰鼎 嶺南大學校 工業技術硏究所 1985 연구보고 Vol.13 No.1
Accoding to need long span structure, Because structure members of the arch use to long member compare with the cross section area, Buckling will occur in these case, and that when member use varying cross section due to economize on materials, Buckling will occur rapidly and easily. Therefore arch is broken down owing to buckling after all ultimately. Some model of similar type Arches of varying cross section selects concretely and the critical load of these model obtains with Energy Mehtod and Simpson's rule for In-plane Buckling. We have to secure the safety factor for In-plane buckling of Arches in consideration from some angles. In view of the results above 1) The magnitude of critical load of each model is A>B>C>D 2) D Model has no effect of varying cross section in buckling 3) The arch which is constant radius is profitable varying cross section in case of α=75˚-90˚ 4) In identical span arch of constant cross section and varying cross section. The Arch is Stabile when RISE SPAN ratio is 1/5-1/4. 5) The critical load of all varying cross section Arch can obtain with the graph easily.
농부가 아닌 환자에서 발생한 긴털가루진드기(Tyrophagus Putrescentiae)에 의한 기관지천식 1례
최대로,김형수,고창옥,김희선,윤호성,박용범,김상훈,이재영 대한천식 및 알레르기학회 2004 천식 및 알레르기 Vol.24 No.1
Storage mites are believed one of the most important allergens in farmers and rural regions. Tyrophagus putrescenitiae, belonging to storage mites, is found not only within storehouses but also in the house dust, and the third most common mites following Dematophagoides farinae and Dermatophagoides pteronyssnus in house dust in Korea. The sensitization rate to Trophagus putrescentiae was reported as high as that of house dust mite in patients visiting the allergy clinic in large cities in Korea. We experienced a 69-year-old man who had suffered from dyspnea, wheezing, and coughing for 10 years. He retired from the teaching profession, and had lived in a large city. Deajeon. The skin prick test showed a positive reaction to Tyrophagus putrescentiae and negative reactions to house dust mites. The bronchial challenge test with Tyrophagus putrescentiae showed late asthmatic reaction. We confirmed a Tyrophagus putrescentiae induced asthma in non occupational setting. (J Asthma Allergy Clin Immunol 24 : 141-5, 2004)
Design and Implementation of a Visitor Detection System using Hybrid Sensors
Hyoung-Ro Lee,Chi-Ho Lin 대한전자공학회 2017 IEIE Transactions on Smart Processing & Computing Vol.6 No.5
In this paper, we propose a visitor detection system based on the Internet of Things using hybrid sensors. It uses an infrared sensor to detect the human body and two ultrasonic sensors to locate visitors, with a servo motor under the camera’s position. When a visitor is detected, the servo motor drives the camera module to locate the visitor. The driven camera module finds the location of the visitor based on ultrasonic sensor data. Recorded video and sensor data are stored in a database. The saved data can be seen via PC and smart devices. We developed the system using Raspberry Pi 2 and sensor modules to verify the concept. The system can track a visitor’s movement and minimizes the blind spots of the camera. And sensor data and recorded video can be checked via the internet from all possible remote locations.
이형로(Hyoung-Ro Lee),윤수정(Su-Jeong Yun),인치호(Chi-Ho Lin) 대한전자공학회 2015 대한전자공학회 학술대회 Vol.2015 No.11
Sudden infant death Syndrome(SIDS) refers to a healthy baby is unexplained deaths between birth year in the month. In this paper, a danger signal to tell care givers when analyzing biological signals a hazardous condition occurs in infants to prevent sudden infant death for the infant monitoring system is proposed. The proposed system consists of a section and signal processing unit for sensing biological signals. Biological signal sensing unit and signal processing using a PPG sensor was as the Arduino Board. The proposed system will send the alarm to monitoring and alerting care givers if the risk situation by analyzing the heart rate of the infant. With the actual implementation of the system to evaluate the performance of the monitoring system.