• 농촌계획
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• 제20권1호
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• pp.1-12
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• 2014

Living environments in rural area have become deteriorated rapidly. Increase of aging population, decline in agricultural income, polarization of wealth in rural community due to rural returners have caused severe decline and imbalance of living environments in rural area. Responding to this circumstances, governments currently develop projects for improving living environments focusing on individual housing which were excluded from governmental supports because those had been regarded as private property. Nevertheless, there are still some gaps and problems in evaluating the quality of living environment and suggesting effective solutions. It would be because standards and guidelines of the projects have been based on urban housing system. In order to support the implementation of the projects, this research has developed an index for evaluating and monitoring the quality of living environments in rural area. By applying Delphi method, the index has been created in four categories of 'security', 'convenience', 'comfortability', and 'durability' 'Security' consists of structural safety, crime, disaster, accident prevention. 'Convenience' includes three divisions of living, traffic, farm working. 'Comfortability' is divided into sanitation, indoor environments, and aesthetic appreciation. Lastly, 'durability' has four divisions of energy conservation, environmental friendliness, efficiency, and economics. Each sub-division also has different items from three to twelves. In the case of an index for performance evaluation, items have been derived from energy conservation(6-items), and environmental friendliness(7-items). Items developed as an index for evaluating rural living environments in this research might be good background information for remodeling project in rural housing development.

• 한국안광학회지
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• 제19권1호
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• pp.31-42
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• 2014

목적: 본 연구는 RGP렌즈 제조 시 렌즈물성과 렌즈착용자 요인과의 관계를 밝힌 선행연구의 후속 연구로 RGP렌즈 연마로 유발된 렌즈물성의 차이가 일정기간 착용 후 착용자가 느끼는 주관적 착용감 및 눈물막 파괴시간, 순목횟수 등에 미치는 영향을 알아보고자 하였다. 방법: 안질환이나 안과적 수술경험이 없는 20대 17명(남자7명, 여자 10명)의 28안에게 각기 다른 연마조건(25초, 50초 및 100초)으로 제조된 3 종류의 렌즈를 각각 1주일 이상 착용하게 하였으며 매일 설문지를 통하여 착용 중의 착용감을 조사하였고, 자각적 및 타각적 눈물막 파괴시간과 순목횟수를 측정하였다. 결과: 연마조건이 다르게 제조된 RGP렌즈를 일주일 이상 착용하였을 때 렌즈 착용자의 주관적 착용감은 렌즈 별로 불편감의 종류나 착용감 점수에서 차이를 보였으며, 특히 RGP렌즈 착용 경험자의 경우는 RGP렌즈 착용 미경험자와 비교하여 연마조건에 따른 착용감 점수의 차이가 크게 나타나는 경향을 보였다. RGP렌즈 착용 경험자의 경우 착용시간이 증가할수록 착용 미경험자에 비하여 렌즈에 더 잘 적응하는 양상을 보여 자각적 및 타각적 눈물막 파괴시간은 더욱 증가하는 경향을 보였으며, 순목횟수는 감소하는 경향을 보였다. 그러나 RGP렌즈 착용 경험 유무와는 관계없이 100초 연마렌즈 착용 시는 착용시간이 길어지더라도 자각적 및 타각적 눈물막 파괴시간은 감소하는 경향을 보였다. 결론: 이상의 결과로 렌즈물성의 최적화가 실제 착용 시에는 착용자의 자각적 및 타각적 증상에서도 동일한 효과를 내는 요인이 되지 못할 수도 있음을 확인하였다. 본 연구결과로부터 현재 식약처에서 제시하고 있는 '소프트콘택트렌즈/하드콘택트렌즈의 제조 기준규격'에 따라 제조된 RGP렌즈는 실제 착용 시 착용자의 눈물막 안정화나 착용감, 렌즈 착용 경험 유무와 같은 생리적 요인에 따라 착용성공률이 달라질 수 있음을 제안할 수 있다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 춘계학술대회 논문집
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• pp.1793-1798
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• 2011

The railway structure for a rubber-wheeled automated guide-way transit system consists of a driveway and a guide-way. The most important factor of this system is the driveway and the guide-way aligned with each other, especially for curves and inclines section. The conventional construction method caused many problems such as discordancy by constructing the driveway before constructing the guide-way. Therefore, in this paper we introduce a new method of constructing a railway for a rubber-wheeled light rail vehicle; the new method of constructing the guide-way beforehand as a preceding process. The new method for AGT railway system can simplify the construction process and thus the construction costs may be reduced. It should also improve the driving performance and the comfortability in operating of a light rail vehicle.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 정기총회 및 추계학술대회 논문집
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• pp.138-141
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• 2011

Carbon dioxide concentration of railroad passenger cabin is obliged to be kept lower than guideline values of 'Indoor air quality guideline for public transportations', but actual carbon dioxide concentration frequently exceeds this guideline value during the morning and evening rush hours. For improving comfortability and satisfaction of passengers, concentration control method using $Al_2O_3$ adsorbents was presented. The adsorbent is made from $Al_2O_3$ and LiOH. $Al_2O_3$ perform as a frame and LiOH as a chemical adsorbent. The adsorbent performance experiment was carried out by measuring concentration change of Carbon dioxide in terms of flow, initial concentration and amount of adsorbent. It is expexted that the obtained results will be used to lower carbon dioxide concentration of railroad passenger cabin.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 정기총회 및 추계학술대회 논문집
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• pp.150-157
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• 2011

Nowadays, high speed train has settled down as a fast and convenient environment-friendly transportation and it's need is gradually increasing. However increased train speed leads to increased aerodynamic noise, which causes critically affects comfortability of passengers. Especially, the pantograph of high speed train is protruded out of train body, which is the main factor for increased aerodynamic noise. Since aerodynamic noise caused pantograph should be measured in high speed, it is difficult to measure it and to analysis aerodynamic noise characteristics due to the various types of pantograph. In this research, aerodynamic noise of pantograph is predicted by CFD (Computational Fluid Dynamic) and FW-H (Ffowcs Williams-Hawkings) equation. Also, Wind tunnel test results and numerical simulation results were compared. As a result, Simulation results predicting sound pressure level is very similar with wind tunnel test result. This research will draw major factor in aerodynamic noise of pantograph and will be utilized for predict sound pressure level of pantograph.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1996년도 Proceedings of the Korea Automatic Control Conference, 11th (KACC); Pohang, Korea; 24-26 Oct. 1996
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• pp.307-310
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• 1996

In this paper, we deal with some numerical analyses of a re-entry vehicle in a 2-dimensional plane as an optimal control problem. To reduce the dynamic load, the heat load and the oscillation in the trajectory, we researched the trajectories in which the load factor or the rate of flight path angle was minimized during re-entry. In addition to that, taking advantage of the monotonous subarc method and the folded time-axis method, we tried to find the heat-less and load-less trajectory with combinations of some sectional functionals so that we can achieve more comfortability.

• 대한기계학회논문집A
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• 제24권2호
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• pp.347-354
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• 2000

This paper presents performance characteristics of a semi-active suspension featuring continuously variable ER (electro-rheological) dampers. These are evaluated through the field test of a passeng er car. Four ER dampers (two for front and two for rear part) are manufactured and their field-dependent damping properties are experimentally investigated. The damping force responses to step input fields are also identified by employing small size of high voltage amplifiers which are made adaptable to the field test. A skyhook controller considering the vertical, pitch and roll motions is formulated and incorporated with a car to be tested. The field test is then undertaken in order to evaluate both comfortability and steering stability showing bump, dive and squat responses.

• 디지털산업정보학회논문지
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• 제5권2호
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• pp.177-184
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• 2009

The digital contents distribution system via network provides comfortability, usability, and diversified functions to content's users. However, for the characteristic of easy access of digital contents, the copyright infringements and indiscreet contents distribution are realized in this days. In other words, any users with the authentication key can access to copyright contents with any restrictions. To solve this problems, we proposed a user authentication mechanism which prevent indiscreet access to the digital content by using user system information. Also, to provide safe distribution of digital content, we used user's unique content authentication key.

• 한국주거학회논문집
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• 제12권4호
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• pp.83-92
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• 2001

The number of aged persons, which would account for 7.1% of total population of 200 year in south korea means that our country would have entered into aging society and that a demand for elderly housing in korea would have been increase rapidly. From this point, this study investigated the present situation of elderly housing in korea, types of those to be provided generally by private and public firms, and the preferred housing types, the location of them and housing sizes of old singles and couples on existing surveys by several firms and organizations. finally, this study suggested several design guidelines to be taken into account in the elderly housings of korea on the basic function of safety, convenience and comfortability and the cultural aspects of leisure life and wealth. Those suggested here will be applied to design guidelines of elderly housing in future.

• 한국주거학회논문집
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• 제14권2호
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• pp.51-61
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• 2003

The purpose of this research is to find out environmental characteristics of elementary school children's room, and determine the relationship between children's room environment and their personality. The finding showed that environmental characteristics of children's room has relationship with children's personality. Such environmental characteristics as convenience, order, originality, safety, and territoriality had a direct and high relationship with children's personality, while such environmental characteristics as accessibility, ability to express, comfortability, privacy, and social interaction had indirect relationship with children's personality through three intervening variables. The finding further said that achievement motivation and reflectiveness of children's personality were the most influenced by children's room environmental characteristics. The environmental characteristics that are the most influential to children's personality were found to be order.