• Toxicological Research
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• 제14권2호
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• pp.183-191
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• 1998

It has been reported that 50~70% of child asthma, bronchial asthma in adult, and allergic rhinitis are caused by house dust mite. The antigen extracted from house dust mite has been used for effective treatment against allergic diseases and for clinical test. This house dust mite antigen has been entirely imported from abroad. However, the composition and content of all the antigen imported vary from a brand to other brand. Thus, we need to standardize the composition and content of the antigen by developing it domestically. We proceeded pre-clinically general pharmacological test and toxicological test that are required for the eventual human use by utilizing the house dust mite cultured in Korea. In order to obtain information on general pharmacological tests such as its toxic signs in tissues or organs which are mainly affected, we examined the effect of house dust mite on the tensions of the isolated tissues and heart rates of cardiac muscle by recording with force displacement transducer of polygragh (Glass Model 7). We determined lethality of antigen extracted from house dust mite in mice and guinea pigs. We examined acute and subacute toxicity by administrating house dust mite extract of 500, 100, 20 times of the expected clinical dose. In male and female mice and guinea pigs, given a sigle intraperitoneal dose of antigen, $LD_{50}$ values were over 5.0 $\textrm{m}{\ell}$/kg, respectively. In animals administrated with house dust mite, there were no significant change of clinical symptom, body weight, food consumption, water consumption, eye examinations, urinalysis, blood biochemistry, and histopathological examinations in any animals tested. We found no toxic effect of this house dust mite. These results show that the house dust mite cultured by us could be used in the development of medicine against allergic diseases caused by the antigen of house dust mite.

• 대한산업공학회지
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• 제34권1호
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• pp.42-48
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• 2008

The house of quality (HOQ) involves subjective and ambiguous information typically through a likert scale, It isimportant to validate consistency of such input in the HOQ before rating the fmal importance of technicalrequirements, Previously, a methodology was developed to test the consistency of relationship strengths in theHOQ between roof matrix and relationship matrix. We described disadvantages of the previous method andpropose a new approach based on the permutation test. Advantages of the proposed method are illustrated withan example.

• 한국농촌건축학회논문집
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• 제12권4호
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• pp.45-52
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• 2010

The study has effected checking the traditional Korean-style house condition in Farm village and the resident preference test in jeonnam area for examination propriety of development a traditional Korean-style house. Also, it was checked over the problem and improvement direction of new building the Korean style house. The resident wanted living in the traditional Korean-style house if it is compromised problem of living equipment and cost of building. First. Jeonnam area Korean style house must keep the 'ㅡ' type plan. Second, the plan must construct compact and effective plan with the main floored room as the center for prevention against an indiscreet plan space extend of outside. Third, it has must need suitable material and construction for applying traditional exterior with effect. Fourth, it has must need actualization plan for the cost of construction is 3,500,000/py for construction.

• 전자공학회논문지B
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• 제33B권7호
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• pp.154-162
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• 1996

The test and evaluation is a integal part of the radar development process and it consists of two parts, field test and in-house test using a standard simulated signal. To take the in-house test, the test environment is needed to generate the critical signal that is used to determine the system design parameters and consists of general urpose measurement equipments, specialized boards and operating softwares. This paper presents the in-house test environment configuration and its function for radar system. Because this test environment genrates the simulated radar signal which has arbitrary flight path and target condition, the developed test environment makes easily to evaluate the function for radar system. The program ability of test parameters makes it possible to apply a test for 2D and 3D radar system.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2005년도 춘계학술대회논문집
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• pp.754-757
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• 2005

Aircraft noise is the serious problem for inhabitants near an air force base. Noise by ground test of aircraft, however, can be minimized through test room construction. In this study, environmental effects of the noise by aircraft ground test were investigated by experiments under the standard act and by performance, prediction of the Hush house, constructed for the noise reduction.

• 한국의류학회지
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• 제17권1호
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• pp.19-35
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• 1993

This study was designed to devise work wear for plastic house worker. It was carried out (1) research on the clothing actual condition through interviewings with plastic house worker and observations, (2) thermal manikin test to measure thermal resistance of experimental clothes and (3) clothing comparing test in the laboratory and in the plastic house. In the laboratory experiment, it was choosen general type (A) and new devised types (B, C) made of microporous fabric for experimental clothes. Experimental clothes were made of 6 combinations including 3 type work wears (A, B, C) and 2 type underwears (1, 2). In the plastic house experiment, it was choosen general types of A (without rest place) and B (with rest place), and devised type C (with rest place), which was appeared good effect in the laboratory experiment. The results were as followings. 1. Work environment of the plastic house in summer and winter was very different from the outer environment. Work motion in the plastic house was burden to the plastic house workers. 2. Plastic house workers had on the general type's work wear. 3. As a result of thermal manikin test, thermal resistance was appeared B1>B2>C2>C1>A1>A2 in orders. 4. In the laboratory experiment, experimental clothes A was appeared smaller burden than B, C. Effect of mesh underwear was not appeared in this study condition. In subjective sensation, experimental clothes C was lower vote than A. Therefore experimental clothes C was superior to A in subjective wearing sensation. 5. In the plastic house experiment, the experimental conditions with rest place were appeared smaller burden than without rest place. General type B was appeared more positive physiological reactions than devised type C but significances between two types was not appeared.

• 한국화재소방학회논문지
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• 제23권4호
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• pp.104-111
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• 2009

국내 저층 공동주택 화재시의 화재 전파 경로와 상층으로의 화재 전파를 살펴보기 위하여 4층 공동 주택을 대상으로 실물화재 실험을 수행하였다. 화재는 3층 주택에서 발화하는 것으로 하였고, 초기 화원은 주방에서 과열된 식용유에 발화되어 발생하는 것으로 하였다. 주택 내부 가연물은 일반 가정의 필수 가연물을 모두 포함하였다. 내부 화재 성상을 확인하기 위하여 가시화, 주요부의 온도측정, 산소농도 측정을 수행하였다. 실험 결과 초기 화원의 발화 시간, 화재 층 내부 각 구획으로의 전파시간, 전역화재 발생시간을 파악하였으며, 상층으로의 연소확대 경로를 파악하였다.

• 한국농공학회논문집
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• 제62권1호
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• pp.117-126
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• 2020

The area of facility horticulture in Korea is increasing rapidly, the single-span pipe house which uses galvanized steel pipe as the main rafters occupies 78.7% of the facility area. Lightweight structures such as the single-span pipe house are vulnerable to meteorological disasters such as strong winds, economic losses of the state, local governments and farmers are continuing as construction does not meet the design standards. In order to minimize economic losses in the horticultural specialty facilities sector, the Rural Development Administration has been operating the horticultural disaster resilient standard for horticultural specialty facilities since April 2007. The only standard for the pipe connector is the disaster resilient standard, there is no standard for the uplift capacity of the house pipe foundation and the research on it is also insufficient. The purpose of this study is to investigate the characteristics of uplift capacity according to the foundation type, compaction ratio and embedded depth through soil box test. The results of the maximum uplift capacity according to the type, compaction ratio and embedded depth can be used as the basic data for the basic design of the pipe house conforming to the disaster resilient standard. Due to the limitation of soil box test, it may be different from the behavior of pipe house installed on site. In the future, the field test and the actual pipe house should be made and supplemented by comparing this result with the field test values.

• 한국공간구조학회논문집
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• 제22권3호
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• pp.41-48
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• 2022

The purpose of this study is to evaluate seismic performances of a modular house system developed by a simple 4-clip fastening method and double metal assembly made of lightweight metals. In order to evaluate structural and non-structural seismic performances of the system. Shaking table test was carried out with full-scale modular units, and a nonlinear pushover analysis was performed to obtain suitable seismic responses for story drifts, displacements, force resistances and dynamic properties of the system. Through 3D analysis and shaking table test, the current method of lightweight modular metal unit assembly and systems with seismic performance of a 4-clip fastening type modular house were demonstrated safe and effective to seismic design.

• 한국지진공학회논문집
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• 제1권4호
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• pp.11-20
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• 1997

우리나라 전통 초가삼간의 1/4 축소모델을 제작하여 암반지반 조건에 대한 내진성능실험을 수행하였다. Nahanni 지진파를 사용하여 최대 가속도 0.1g~0.6g 범위에서 거동을 분석하였다. 탄성한계에서 초가삼간의 고유진동수는 장방향의 경우 약 1.66Hz, 단방향의 경우 215Hz이다. 탄성한계에서의 감쇠비는 약 7%이다. 수평방향의 가속도응답은 입력에 비해 감소하며 입력가속도 수준이 증가할수록 감소율이 증가한다. 이는 사개맞춤으로 만들어진 목조 프레임의 비선형.비탄성 특성 때문이다. 전통 초가삼간 가옥은 고진동수가 지배적인 암반지반에서 매우 큰 내진성능을 나타내었다.