• 한국입자에어로졸학회지
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• 제12권1호
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• pp.21-26
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• 2016

In order to realize In-line and convenient measurement for solid-gas two phase flows, Light Transmission Fluctuation (LTF) based on the random variation of transmitted light intensity, light scattering theory and cross-correlation method was presented for online measurement of particle size, concentration and velocity. The statistical relationship among transmitted light intensity, particle size and particle number in measurement zone was described by Beer-Lambert Law. Accordingly, the particle size and concentration were determined from the fluctuation signal of transmitted light intensity. Simultaneously, the particle velocity was calculated by cross-correlation analysis of two neighboring light beams. By considering the influence of concentration variation in industrial applications, the improved algorithm based on spectral analysis of transmitted light intensity was proposed to improve measurement accuracy and stability. Therefore, the online measurement system based on LTF was developed and applied to measure pulverized coal in power station and raw material in cement plant. The particle size, concentration and velocity of powder were monitored in real-time. It can provide important references for optimal control, energy saving and emission reduction of energy-intensive industries.

• 한국지리정보학회지
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• 제24권2호
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• pp.78-90
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• 2021

정밀지오이드를 구축하기 위하여 육상, 해상, 항공, 위성 중력측정 방법으로 다양화되고 측정 기술이 발전되어 고해상도 고정밀도의 중력자료 확보가 가능해졌다. 정밀지오이드의 구축은 별도의 수준측량 없이 GNSS 측량을 통해 표고를 빠르고 편리하게 결정할 수 있으며 우리나라는 2014년부터 국토지리정보원에서 GNSS를 기반으로 한 높이측량 정확도를 향상시키기 위해 합성지오이드 모델을 개발하고 있다. 본 연구에서는 공공측량의 GNSS높이측량을 검증하기 위하여 기존의 고시된 공공기준점을 선점하여 GNSS높이측량 결과와 비교 분석하였다. 실험은 연구보고서 등에서 정밀도가 낮은 지역으로 제시되거나 정밀도가 낮을 것으로 예상되는 연안, 접경, 산악지형의 공공기준점에 대하여 GNSS높이측량을 수행하고 정밀도를 분석하였다. GNSS높이측량 검증을 위해 공공기준점 GNSS높이측량 기지점으로 사용될 주변 통합기준점의 GNSS 타원체고를 점검하였다. 점검된 통합기준점을 기준으로 공공기준점의 GNSS 타원체고를 산출하고 KNGeoid18 모델을 이용하여 표고를 계산하여 직접수준측량 표고결과와 비교하였다. 분석 결과 연안, 접경, 산악 지역 공공기준점의 GNSS 높이측량 결과가 3·4급 공공수준측량 정확도에 만족하는 것으로 나타났다. 이를 통하여 사용자가 요구하는 높이 정확도에 따라 기존의 직접수준측량보다 GNSS 높이측량이 효율적으로 이용될 수 있으며, KNGeoid18도 자율주행자동차, 무인항공기 등 다양한 분야에서 활용될 수 있을 것으로 판단된다.

• 한국산업보건학회지
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• 제29권1호
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• pp.50-56
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• 2019

Objective: The aim of this study is to analyze the reliability assessment of work environment measurement, and to propose ways of improving the system. Methods: We have reviewed reports and articles on the reliability assessment written by KOSHA and academia in order to analyze problems related with the system and propose the alternatives. Results: There are three ways to improve the system of the reliability assessment. First of all, it is necessary to perform the reliability assessment by measuring the work environment when workers raise questions about the results so we can make workers trust these results of the reliability assessment. Secondly, we should inspect the workplace at first, not the work environment service provider, so we can increase the employer's recognition of his duty to practice the work environment measurement. Thirdly, the technical committee is needed for technical issues related with the work environment measurement. Conclusions: Above all, it is crucial to get the workers' interest and trust to improve the work environment measurement. The reliability assessment should support the meaning and value of the work environment measurement by practicing the reliability assessment whenever workers have a demand for this and operating the technical committee.

• 한국디지털건축인테리어학회논문집
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• 제4권2호
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• pp.52-59
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• 2004

The interest about noise and vibration which occurs in buildings is increasing by a living level elevation recently. Particularly, the vibration which occurs from the elevator cage of the building is possibility of damage to the users of the building continuously. So, the purpose of this study is to suggest of measuring results to the vibration that occurs from the elevator cage and propose the countermeasure of it.

• 한국의상디자인학회지
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• 제3권1호
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• pp.47-55
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• 2001

The Human Sensibility Measurement Technology, the engineering discipline that translate the imagination and good impression of human being into a physical factor for relevant product, is important to improve the quality of industrial products. This dissertation is aimed at measuring and evaluating the human sensibility for texture I presented the image scale in expectation of applying it to the production and choice of goods fitting into one's sensibility and to the coordination of goods which have similar images.

• 한국엔터테인먼트산업학회논문지
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• 제15권7호
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• pp.87-96
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• 2021

본 연구는 우리나라의 초등학교, 중학교, 그리고 고등학교에서 수행되고 있는 학생건강체력평가시스템(PAPS)의 문제점을 분석하고 개선방안 마련을 목적으로 한다. 연구의 자료는 심층면담, 관련논문, 그리고 인터넷 보도자료 등을 토대로 확보했다. 본 연구의 연구 참여자는 현직 체육교사 5명과 PAPS를 직접 경험했던 5명의 대학생들이다. 연구의 결과는 다음과 같다. 첫째, PAPS의 교육환경에서 발생하는 문제점은 학생들의 무관심, 교사들의 소극적인 지도, 그리고 PAPS 측정일로 대체되는 체육시간 감소 등이다. 둘째, PAPS의 측정환경에서 발생하는 문제점은 측정장비에 의한 오차, 측정장소에 따른 편차, 그리고 측정 종목에 따른 등급의 차이 등으로 나타났다. 셋째, PAPS의 측정과정에서 발생하는 문제점은 측정인원의 부족, 편법에 의한 체력측정, 그리고 상이한 측정방법 등이다. 이러한 문제점을 개선하고 PAPS를 성공적으로 적용시키기 위해서는 첫째, 교사들은 학생들에게 PAPS에 대한 관심과 흥미를 고취시켜야 한다. 둘째, PAPS의 측정결과 값에 대한 신뢰성을 확보해야 한다. 셋째, PAPS의 측정을 위한 학교교육시스템의 제도적 보완이 필요하다.

• 대한가정학회지
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• 제39권11호
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• pp.89-106
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• 2001

The purpose of this study is to critically review the related issues of marital satisfaction scale in order to develop a Korean Type Marital Satisfaction Scale. Especially definitional ambiguity, unit of analysis theory of marital satisfaction and issues about measurement and cultural implication are reviewed. Also a section deals with suggestions that could be considered to develop Korean Type Marital Satisfaction Scale.

• 한국입자에어로졸학회지
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• 제15권2호
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• pp.67-78
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• 2019

Since existing measurement sites are required to construct a high-cost PM measuring device and a measuring site of a large area, there is a limit to the construction of a high-resolution measurement network. Therefore, it is necessary to develop a low-cost, high-performance PM measuring device (as an alternative technology) that can increase the resolution of PM measurement, and it is necessary to establish a base to provide real-time PM information for whole people. Therefore, in this study, the alternative technique (light scattering method) for achieving the above object was examined, performance evaluation was carried out, and it was verified that the light scattering method was usable. Various PM measurement results were compared and analyzed to find PM monitoring points and resolutions we would like to propose.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2005년도 학술발표회(2)
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• pp.936-937
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• 2005

• 한국펄프종이공학회:학술대회논문집
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• 한국펄프종이공학회 2001년도 춘계학술발표논문집
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• pp.106-115
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• 2001