• 센서학회지
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• 제23권4호
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• pp.266-271
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• 2014

Chemical sensors are used in various industrial facilities such high-risk and prevent the leakage of substances, important in life and environmental protection and the safe use of industry, used for management. In particular, high-temperature environments such as power generation equipment of the rotating part due to leakage generated by the various oil, power plants Shut Down, fire, work environment (exposure to various chemical solution and gas leak) and various water, air and soil pollution causes. Thus, over the long term through various channels such as crops and groundwater contamination caused by the slow, serious adverse effect on the ecosystem. In this paper, synthetic lube oil and high pressure hydraulic fluid leakage and immediately detect a new Printed Electronic implementation of technology-based film-type sensors, and its performance test. Thus, industrial accidents and environmental pollution and for early detection of problems, large accidents can be prevented. Experimental results of the synthetic lube oil and high pressure hydraulic fluid solution after the contact time depending on the experiment and the oil solution of the sensor material of the conductive porous PE resistance value by a chemical reaction could be confirmed that rapid increase. Also implemented in the film-type oil sensor electrical resistance change over time of the reaction rate and the synthetic lube oil is about 2 minutes or less, the high pressure hydraulic fluid is less than about 1 minute was. Therefore, more high-pressure hydraulic fluid such as a low volatility synthetic lube oils are the resistance change and the reaction rate was confirmed to be the slowest.

• 대한약침학회지
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• 제19권4호
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• pp.293-302
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• 2016

The use of folk medicine has been widely embraced in many developed countries under the name of traditional, complementary and alternative medicine (TCAM) and is now becoming the mainstream in the UK and the rest of Europe, as well as in North America and Australia. Diversity, easy accessibility, broad continuity, relatively low cost, base levels of technological inputs, fewer side effects, and growing economic importance are some of the positive features of folk medicine. In this framework, a critical need exists to introduce the practice of folk medicine into public healthcare if the goal of reformed access to healthcare facilities is to be achieved. The amount of information available to public health practitioners about traditional medicine concepts and the utilization of that information are inadequate and pose many problems for the delivery of primary healthcare globally. Different societies have evolved various forms of indigenous perceptions that are captured under the broad concept of folk medicine, e.g., Persian, Chinese, Grecian, and African folk medicines, which explain the lack of universally accepted definitions of terms. Thus, the exchange of information on the diverse forms of folk medicine needs to be facilitated. Various concepts of Wind are found in books on traditional medicine, and many of those go beyond the boundaries established in old manuscripts and are not easily understood. This study intends to provide information, context, and guidance for the collection of all important information on the different concepts of Wind and for their simplification. This new vision for understanding earlier Chinese medicine will benefit public health specialists, traditional and complementary medicine practitioners, and those who are interested in historical medicine by providing a theoretical basis for the traditional medicines and the acupuncture that is used to eliminate Wind in order to treat various diseases.

• 조명전기설비학회논문지
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• 제17권6호
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• pp.130-137
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• 2003

고조파에 의한 전력품질저하로 인해 전기설비의 성능저하, 소음, 진동 등의 장해현상이 발생한다. 또한 앞으로 에너지 이용 효율을 높이기 위한 대책으로 반도체 회로를 사용하는 에너지 절약장치가 널리 보급되고, 전동기 속도 제어장치, 에너지 저장장치 등 에너지 변환장치의 사용이 증가될 전망이어서 고조파의 발생은 필연적이며 그 문제점은 심각하게 대두될 것이다. 이러한 고조파에 의한 장애를 해결하기 위해서는 전압, 전류, 전력, 역률, 고조파 차수별 성분 및 고조파 총합 왜형률 등의 정확한 전력품질을 측정하고 분석할 필요가 있다. 본 연구에서는 이러한 고조파 관련 전력품질을 측정하고 분석할 수 있는 저가형 측정시스템을 개발하였으며 3상 4선식 계통에서 전력품질을 측정하고 분석함으로써 그 성능을 입증하였다.

• 농촌계획
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• 제22권4호
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• pp.61-69
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• 2016

In order to reduce the farmers' burden of purchasing agricultural machinery and address the shortage of farm workers, the government have been promoting agricultural machinery rental service since 2003. Despite of political purpose, the outcome of agricultural machinery rental service turned out to be adverse, high cost and low efficiency, by the pork barrel projects operated from some municipalities. Therefore, this study was aimed to improve the efficiency of agricultural machinery rental service by analyzing the operation status of agricultural machinery in local government. A questionnaire survey was conducted at 134 cities and counties in terms of rent type, management personnel, business budget, agricultural machinery ownership, rental performance, use rates, operational problems, and improvement plan. This study found that some agricultural machinery rental offices were only focused on the short-term rental service, which caused the increasing number of operating personnel, required facilities/equipment. The short-term rental service has a limitation for promoting the mechanization rate in dry-field farming. Therefore, it should be carried out along with the long-term rental service which a lessee maintains and manages agricultural machinery directly. Furthermore, the reasonable number of agricultural machinery based on regional circumstances should be considered to meet rental demand and collect the minimal rental fee for purchasing new agricultural machinery and replacing old ones.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 제37회 하계학술대회 논문집 A
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• pp.486-487
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• 2006

The authors have studied on the application of IEC 60364-4-44 to Korean electrical installations of buildings from 2004 sponsored by Korean ministry of commerce, industry and energy and the test field is established in K.E.R.I. (Korea Electrotechnology Research Institute). This paper presents the summary results of establishment of test field and analysis for the application of IEC 60364 in Korea. IEC 60364-4-44 provides rules for the protection against the effects of conducted and radiated disturbances on electrical installations. Especially this standard deals with the protection of low voltage facility against the ground fault in the high voltage side of power distribution system. Many countries define the regulations on the use and production of electrical facilities based on their own power system and technical references which are considered to be suitable for them. The background of circuit of IEC 60364-4-44 is based on the ungrounded system as most of European countries. However, since Korean electric power distribution system is based on multi-grounding system different from European system, it is necessary to evaluate or prove the effect of the IEC 60364-4-44 for introducing and applying it to the domestic grounding system as a Korean standard. This paper presents the establishment of test field to get background data to introduce the IEC 60364-4-44 and to evaluate the standard is applicable to domestic rule for the protection against ground fault through the related test

• 한국콘텐츠학회논문지
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• 제18권4호
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• pp.688-697
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• 2018

본 연구는 도시민들의 귀농귀촌을 유도하고 농촌 정주환경 개선을 위해 시행되고 있는 전원마을 사업의 성과를 분석하고 이를 통해 정책적 시사점을 제시하고자 하였다. 이를 위하여 전원마을 거주자들을 대상으로 12개 항목을 통해 이주 전 중요하게 생각한 것과 이주 후 만족하고 있는 것을 조사하고 'IPA 분석(Importance-Performance Analysis)' 을 통해 향후 전원마을 조성사업의 추진전략을 제시하였다. 이주 전 중요도와 이주 후 만족도가 높은 항목은 '자연환경 및 경관'인 것으로 분석되었다. 반면 이주 전 중요하다고 생각했지만 이주 후 만족도가 낮은 항목은 '대중교통 및 자가용 접근성'과 '도로 및 주자시설'인 것으로 분석되었다. 따라서 향후 전원마을 입지를 결정할 때 자연환경 및 경관과 함께 접근성 측면까지 고려하여 입지가 결정될 필요가 있다. 본 연구는 거주자의 인식에 기반하였다는 것과 설문조사 지역이 한정되어 있다는 한계가 있음에도 불구하고 향후 전원마을 입지선정 및 토지이용계획 수립에 중요한 정책적 함의를 제공하였다.

• 한국콘텐츠학회논문지
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• 제17권8호
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• pp.483-489
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• 2017

본 연구는 저출산 고령화시대의 가장 중요한 공공시설이자 핵가족화 및 여성사회참여 등의 사회변화로 그 중요성이 커져가고 있는 어린이집에 대하여 그 이용권을 분석하고자 하였다. 이를 위해 본 연구에서는 수원시의 시립어린이집 32개소의 2,174명의 아이들에 대한 이용실태를 조사하여 통행수단별 이용권을 도출하였다. 분석 결과, 영아(0~2세) 과정의 대부분은 차량을 통해 어린이집을 이용하고 있었으며, 90%ile에 해당하는 이용권은 약 3km로 나타났다. 다음으로 누리(3~5세) 과정의 아이들 중 걸어서 어린이집에 등원하는 경우의 85%ile에 해당하는 이용권은 약 500m로 나타났으며, 차량을 이용하는 경우 90%ile에 해당하는 이용권역은 약 1.3km로 나타났다. 본 연구는 다음과 같은 시사점을 제공한다. 누리과정과 영아과정의 차량 이용권역을 고려할 때, 생활권별 1개소 이상의 어린이집 설치가 필요하다. 특히, 영아과정의 보육서비스를 제공하는 어린이집이 시급히 확충될 필요가 있다. 다음으로 어린이집 중심의 보행환경 개선사업이 필요하다.

• 한국콘텐츠학회논문지
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• 제18권8호
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• pp.62-72
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• 2018

본 연구는 1인 미디어 콘텐츠의 활성화를 모색하기 위해 구독자 10만 명 미만을 가진 초기 크리에이터를 대상으로 MCN 선택 동기와 콘텐츠 창작자로서 겪는 어려움, 지원 요구사항을 설문조사를 통해 분석하였다. 연구결과, 크리에이터들이 MCN을 선택하는 동기는 콘텐츠 제작과 유통에 대한 지원 및 수익 배분에 대한 만족 때문인 것으로 나타났다. 그러나 MCN을 불신하거나 독자 운영이 가능한 크리에이터는 독립적으로 활동하고 있었다. 크리에이터들은 공통적으로 해외 진출의 어려움을 인식하고 있었다. MCN에 소속되지 않은 크리에이터들은 콘텐츠 마케팅과 유통을, MCN 소속 크리에이터들은 해외 시장진출을 가장 어렵다고 인식하고 있었다. 또한, 소속 여부에 상관없이 동영상 플랫폼의 이용자 확대, 수익성에 대해 만족도가 낮았다. 성별에 있어서 여성 크리에이터들은 영상제작 수월성과 동영상 플랫폼의 작업 편리성에 대한 만족도가 떨어지는 것으로 나타났다. 초기 크리에이터들은 공통적으로 제작비 지원과 제작시설과 같은 인프라 구축을 필요로 하고 있었으며 특히 마케팅이나 해외 진출에 대한 공적 지원에 대한 요구가 크게 나타났다.

• Structural Engineering and Mechanics
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• 제17권3_4호
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• pp.527-537
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• 2004

Consequence-Based Engineering (CBE) is a new paradigm proposed by the Mid-America Earthquake Center (MAE) to guide evaluation and rehabilitation of building structures and networks in areas of low probability - high consequence earthquakes such as the central region of the U.S. The principal objective of CBE is to minimize consequences by prescribing appropriate intervention procedures for a broad range of structures and systems, in consultation with key decision makers. One possible intervention option for rehabilitating unreinforced masonry (URM) buildings, widely used for essential facilities in Mid-America, is passive energy dissipation (PED). After the CBE process is described, its application in the rehabilitation of vulnerable URM building construction in Mid-America is illustrated through the use of PED devices attached to flexible timber floor diaphragms. It is shown that PED's can be applied to URM buildings in situations where floor diaphragm flexibility can be controlled to reduce both out-of-plane and in-plane wall responses and damage. Reductions as high as 48% in roof displacement and acceleration can be achieved as demonstrated in studies reported below.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 추계학술대회 논문집 전력기술부문
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• pp.116-118
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• 2005

IEC 60364-4-44 provides rules for the protection against the effects of conducted and radiated disturbances on electrical installations. Especially this standards deals with the protection of low voltage facility against the ground fault in the high voltage side of power distribution system. Many countries defines the regulations on the use and production of electrical facilities based on their own power system and technical references which are considered to be suitable for themselves. The background of circuit of IEC 60364 is based on the ungrounded system as most of European countries adopt. However, since domestic ground system is multi-grounding system different from European system, it is necessary to evaluate or prove the effect of the IEC 60364 for introducing and applying it to the domestic grounding system as a Korean standard. This paper presents the establishment of test field to get background data to introduce the IEC 60364 and to evaluate the standard is applicable or not to domestic rule for the protection against ground fault through the related test.