• 보건의료생명과학 논문지
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• 제8권2호
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• pp.121-125
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• 2020

인원계수는 특정 시설의 혼잡도나 이용량을 파악하여 시설을 효율적으로 관리하거나 화장실 등 특정 장소의 출입인원을 파악하여 자동으로 절전기능을 구현함으로써 에너지 절약을 최대화하기 위한 용도로 늘 관심있는 방법이었다. 영상처리에 의한 인원계수 방법은 매우 비용이 비싸며 조명의 주위환경에 심하게 영향을 받는 단점이 있고 area sensor의 경우 인원이 팔짱을 끼고 근접하여 통과할 경우 1명의 인원으로 계수하는 단점이 있다. 비용이 비싸고 조명에 영향을 받거나 특정한 경우 인원계수가 부정확한 기존의 방법을 해결하기 위하여 본 논문에서는 라이다(LIADAR)의 원리를 이용한 새로운 인원계수 방법을 제안한다. 병원 출입인원을 정확하기 계수하는 것은 병원시설을 관리하는 데도 도움이 되겠지만 코로나19가 만연한 현시점에서 효율적인 방역대책을 세우는 데도 도움이 될 것이다.

• 한국실내디자인학회논문집
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• 제18권1호
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• pp.3-10
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• 2009

The relationship between light and space is fundamental In an opera stage design. In contemporary stage design, light, color and space themselves became one of tile most important elements to express and symbolize the content of the opera. This was very different compared to the primitive and medieval opera stage design in the past. The designer tried to represent the same periodical background of the opera with exact replica of the buildings as well as costumes. In comtemporary performance art, light became one the most important aspects in design. Max Keller is one of the living pioneers in stage lighting design. This thesis that is based on his lighting experiments and projects attempts to examine how contemporary stage design and light are applied and what kind of characteristics they have. One of the Wagner's opera, "Tristan und Isolde" was selected to be further analyzed. Three different "Tristan und Isolde" opera stage designs were carefully studied in terms of how three designs are differently constructed for specific same contents of the opera. This sort of comparison study is crucial when there is a strict parameter that is the opera itself. It was found that three opera stages have very different stage designs and unique ways of expressing the opera flow and contents. However, in some parts, very similar lightings were used. This sort of multi-disciplinary study can be helpful to re-think the interior environment by applying light as a fundamental medium.

• 실천공학교육논문지
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• 제11권1호
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• pp.43-50
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• 2019

대학 졸업 인증 기준으로 전자공학 전공에서 졸업작품 구성과 구성 결과에 대한 논문 작성에 관련된 일련의 교과과정을 3학기 동안 진행한 향기와 조명을 사용한 불면증 완화 시스템 구성 결과를 통해 이루어진 공학 교육의 실천 방법에 대한 구체적 예를 제시한다. 시스템 구성 과정에서 발생한 문제들의 해결 방법과 의사 전달 및 결정 방법을 팀 단위로 체득하면서 이루어진 학습 성취 과정의 체계적 구성을 제안한다. 또한 공학 지식 습득과 함께 이루어진 전공 과정의 성취 만족도를 조사 분석하였고, 교과과정의 학습성과 성취도 측정 결과에 대한 공학문제 수준설명(Level Descriptor)도 만족함을 확인하였다.

• 한국전자통신학회논문지
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• 제12권5호
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• pp.933-940
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• 2017

본 논문에서는 LED 광색의 삼속성을 이용하여 상황에 따라 변하는 인간의 심장 박동수를 안정시키는 감성조명을 제작하였다. 특정 기타 악보내의 기타코드와 박자로 제어한 동적 LED와 정적 LED, 무조명시 심장박동수의 변화를 확인하였다. 그 결과, 피실험자의 특정 시간동안의 bpm 기울기가 동적 LED 상태에서 -12.85이며 정적인 LED의 -12.05, 무조명상태의 -11.05보다 가파른 것을 확인하였으며 이는 동적 LED가 다른 상태에서보다 심장 박동수의 안정화에 효과적임을 알 수 있다.

• 대한인간공학회지
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• 제34권3호
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• pp.223-234
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• 2015

Objective:This study aims to investigate the correlation between office environment satisfaction levels and workers' subjective symptoms by conducting surveys asking office workers to state their subjective symptoms and office satisfaction levels. Background: The increased number of office workers and their work hours have led to new understandings of the importance of office environments including its temperature, humidity, noise levels, lighting, space arrangements, and quality of air. Method: Specific details on office work, office environment, office space satisfaction levels, workplace related symptoms, absence from work, due to workplace-related symptoms, were analyzed based on the survey answers given by 451 office workers who were the subjects of this research. Results: Office workers showed different characteristics of subjective symptoms depending on their gender, age, work experience, and time spent resting and on computers. Also, differences in symptoms were found for workers with different satisfaction levels for office environment (temperature, humidity, noise levels, quality of air, lighting) and office space arrangements (location of monitors, area and display of office space, chairs and desks). Conclusion and Application: Relationship between workers' satisfaction levels with the office environment and their subjective symptoms is expected to be serve as essential data for systematic management of the workplace.

• 한국기계가공학회지
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• 제13권2호
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• pp.64-72
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• 2014

In the past, prism patterns have been linear triangular shapeswith a $90^{\circ}$ angle; however, new micro prism patterns having acute angles or obtuse angles have recently been the subject of demandin the display, lighting and photovoltaic industries. Micro-cutting experiments for micro-prism patterns having $60^{\circ}$, $90^{\circ}$, and $120^{\circ}$ angles on an electroplated Ni mold were performed and it was found in this study that the specific cutting resistance increased with a decrease in the tool angles (prism pattern angles). The cause of this variation had been thought to be the increase of the ploughing force due to tip rounding and the friction force due to the edge effect. However, the depth of the cut was large enough that it was possible to neglect these effects. Therefore, this study introduced the concept of representative stress of indentation. The measured stress was varied according to the indentation depth eventhoughthetestedspecimenswereidentical ; the varied stress was termed the representative stress. According to indentation theory, the strain that the Ni mold experienced increased with a decrease in the tool angle. Based on the stress-strain relationship, higher strain means higher stress and higher specific cutting resistance. Therefore, the specific cutting resistance was higher at smaller tool angles that had higher strain and stress.

• 한국도로학회논문집
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• 제16권5호
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• pp.133-142
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• 2014

PURPOSES : The objective was to develop the advanced method which could not explain each observation's specific characteristic in the present negative binomial method that results in under-estimation of the standard error(t-value inflation) and affects the confidence of whole derived results. METHODS : This study dealt with traffic accidents occurring within interchange segment on highway main line with RPNB(Random Parameter Negative Binomial) method that enables to take account of heterogeneity. RESULTS : As a result, AADT and lighting installation type on the road were revealed to have random parameter and in terms of other geometric variables, all were derived as fixed parameter(same effect on every segment). Also, marginal effects were adapted to analyze the relative effects on traffic accidents. CONCLUSIONS : This study proves that RPNB method which considers each observation's specific characteristics is better fitted to the accident data with geometrics. Thus, it is recommended that RPNB model or other methods which could consider the heterogeneity needs to be adapted in accident analysis.

• 한국농업기계학회:학술대회논문집
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• 한국농업기계학회 1996년도 International Conference on Agricultural Machinery Engineering Proceedings
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• pp.773-779
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• 1996

Dried oak mushroom have complex and various visual features. Grading and sorting of dried oak mushrooms has been done by the human expert. Though actions involved in human grading looked simple, a decision making underneath the simple action comes from the result of the complex neural processing of the visual image. Through processing details involved in human visual recognition has not been fully investigated yet, it might say human can recognize objects via one of three ways such as extracting specific features or just image itself without extracting those features or in a combined manner. In most cases, extracting some special quantitative features from the camera image requires complex algorithms and processing of the gray level image requires the heavy computing load. This fact can be worse especially in dealing with nonuniform, irregular and fuzzy shaped agricultural products, resulting in poor performance because of the sensitiveness to the crisp criteria or specific ules set up by algorithms. Also restriction of the real time processing often forces to use binary segmentation but in that case some important information of the object can be lost. In this paper, the neuro net based real time recognition algorithm was proposed without extracting any visual feature but using only the directly captured raw gray images. Specially formated adaptable size of grids was proposed for the network input. The compensation of illumination was also done to accomodate the variable lighting environment. The proposed grading scheme showed very successful results.

• 한국수산과학회지
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• 제55권6호
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• pp.894-902
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• 2022

This study investigated the effects of photoperiod (NL 12L:12D and LL 24L:0D) and body sizes (30 g and 50 g) on parr-smolt transformation, post-smolt growth and blood properties in the off-season parr-smolt stage of Atlantic salmon reared in a recirculating aquaculture system (RAS). Potential off-season salmon smolt were reared in a freshwater RAS for 80 days and then all experimental fish were transferred to seawater. In both LL groups (LL-30 and LL-50), we recorded and increase in specific growth rate and reduction in feed conversion, although there were no significant difference in body size. The values of osmolality, and serum Na⁺, Cl^- and cortisol concentrations in the LL groups were maintained at lower levels than in NL group fish, and LL group fish were observed to recover to the pre-seawater adaptation state more rapidly than those in the NL group. ID chips were inserted in all smolts reared in freshwater. These fish were subsequently transferred to full-strength seawater and thereafter individual growth rates were monitored for 120 days. The results indicated that compared with smolt reared under natural photoperiodic condition, 24 h lighting in freshwater contributed to enhancing post-smolt specific growth rate in seawater.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2001년도 하계종합학술대회 논문집(4)
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• pp.231-234
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• 2001

This paper proposes a face recognition technique that effectively combines elastic graph matching (EGM) and Fisherface algorithm. EGM as one of dynamic lint architecture uses not only face-shape but also the gray information of image, and Fisherface algorithm as a class specific method is robust about variations such as lighting direction and facial expression. In the proposed face recognition adopting the above two methods, the linear projection per node of an image graph reduces dimensionality of labeled graph vector and provides a feature space to be used effectively for the classification. In comparison with a conventional method, the proposed approach could obtain satisfactory results in the perspectives of recognition rates and speeds. Especially, we could get maximum recognition rate of 99.3% by leaving-one-out method for the experiments with the Yale Face Databases.