• 한국지능시스템학회:학술대회논문집
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• 한국퍼지및지능시스템학회 2004년도 춘계학술대회 학술발표 논문집 제14권 제1호
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• pp.149-152
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• 2004

Generally the wafer is increased by 300mm. We are desired that the wafer is prevented from pollutions of metal contaminant on surface of wafer. We have to develop new wafer cleaning process of IC Manufacturing that can reduce DI water and chemical by removal of the wafer cleaning process step. Moreover, it is difficult to control temprature and density of chemical in spite of rapidly increasing automation of system. We design smart module controller for new generation of semiconductor wet station with intelligent algorithm using data that is taken by computer simulation for optimal system.

• Environmental Engineering Research
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• 제22권4호
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• pp.377-383
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• 2017

A tube-type ceramic membrane for microfiltration was developed, and the membrane module comprised of three membranes was also applied to biological carbon and nitrogen removal processes for post-treatment. Manufacturing the microfiltration membrane was successful with the structure and boundary of the coated and support layers within the membrane module clearly observable. Total kjeldahl nitrogen removal from effluent was additionally achieved through the elimination of solids containing organic nitrogen by use of the ceramic membrane module. Removal of suspended solids and colloidal substances were noticeably improved after membrane filtration, and the filtration function of the ceramic membrane could also easily be recovered by physical cleaning. By using the ceramic membrane module, the system showed average removals of organics, nitrogen, and solids up to 98%, 80% and 99.9%, respectively. Thus, this microfiltration system appears to be an alternative and flexible option for existing biological nutrient removal processes suffering from poor settling performance due to the use of a clarifier.

• 한국전기전자재료학회논문지
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• 제37권2호
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• pp.182-187
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• 2024

Currently, the most developed new energy source is solar energy. Because solar power is installed outside, it is exposed to many pollutants. Pollutants are causing the characteristics of solar energy to deteriorate. Therefore, this study aims to develop a water-repellent coating to prevent contamination of solar modules. Silica and Titania materials are mainly used as water-repellent coating materials. In this study, it was based on silica and the contact angle characteristics were measured according to the change in the amount of silica and ammonia water added and the number of coatings. As a result of the measurement, it was confirmed that the contact angle was more than 60 degrees when 0.5 mol of TEOS was added to 50 mL and 0.15 M when 1 mL of ammonia water was added to 296.47 ml of distilled water. And it was confirmed that the contact angle improved when the number of coatings was applied twice. A water-repellent coating material was applied to low iron tempered glass used to protect dye-sensitized solar cell modules. The characteristics of the module were measured after spraying DI-Water on low-emission tempered glass with a water-repellent coating. As a result of the measurement, the efficiency of the module without application, the efficiency of the module coated once, and the module coated twice were 4.87%, 4.90%, and 4.91%, respectively. It was confirmed that the efficiency of the module increased by applying water-repellent coating. As a result of this study, it is determined that the water-repellent coating material will help improve solar power generation efficiency and lifespan by being self-cleaning and non-reflective.

• 한국막학회:학술대회논문집
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• 한국막학회 2005년도 춘계 총회 및 학술발표회
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• pp.128-130
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• 2005

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2007년도 추계학술발표대회
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• pp.1088-1091
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• 2007

RFID 기술의 상용화를 저해하는 한 요소인 태그 인식률 문제를 보완하기 위한 클리닝 모듈을 설계한다. 클리닝 모듈은 RFID 리더로부터 원본 데이터를 클리닝 모듈을 통해 애플리케이션에서 사용 가능한 수준의 정보로 가공한다. 클리닝 모듈의 성능을 확인하기 위해 태그의 논리적인 구역을 정하고 태그의 이동을 추적한다. 실험결과를 통해 클리닝 모듈 적용 전후를 비교하여 모듈의 성능을 평가한다.

• 대한기계학회논문집B
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• 제37권11호
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• pp.971-975
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• 2013

태양광 발전은 일사량이 높을수록 발전량이 증가된다. 그러나 일사량이 높아짐에 따라 셀의 온도도 같이 증가하여 발전효율은 감소하게 된다. 일반적으로 태양광 셀(Cell) 표면의 온도를 $1^{\circ}C$ 감소시키면 약 0.5%의 발전량의 증가가 있다고 알려져 있다. 본 논문은 태양광 발전량 증가를 위해 냉각/세정 장기 실증 실험을 수행하였다. 기전력과 집광량을 높이기 위해 모듈 표면 온도를 낮추고 오염물질을 제거하는 냉각/세정 기술을 이용하였다. 실험 방법은 냉각/세정 설비가 설치된 곳과 설치되지 않은 곳의 이용률을 비교하였다. 장기 실증 시험을 결과 냉각/세정 설비의 구동으로 인한 발전량이 최소 13%에서 최대 19%까지 증가하였다.

• 한국IT서비스학회지
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• 제12권2호
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• pp.361-371
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• 2013

Public domain defect data sets, such as NASA data sets which are available from the NASA MDP and PROMISE repositories, make it possible to compare the results of different defect prediction models by using the same data sets. This means that repeatable and general prediction models can be built. However, some recent studies have raised questions about the quality of two versions of NASA data set, and made new cleaned data sets by applying their data cleaning processes. We find that there are two ways in the NASA MDP versions to determine the defectiveness of a module, 0 or 1, and the two results are different in some cases. This serious problem, to our knowledge, has not been addressed in previous studies. To handle this ambiguity problem, we define two kinds of module defectiveness and two conditions that can be used to determine the ambiguous cases. We meticulously analyze 5 projects among the 13 NASA projects by using our ambiguity analysis method. The results show that JM1 and PC4 are the best projects with few ambiguous cases.

• 한국태양에너지학회 논문집
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• 제35권2호
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• pp.63-71
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• 2015

Soiling is the accumulation of dirt on photovoltaic (PV) modules and can reduce the performance of the PV power plant depending on the site location. Nevertheless, the reason which can not be the great interest to researchers of PV reliability is the phenomenon of performance loss caused by external environmental factors, not the internal degradation of the PV module. In this paper, we provide the phenomenon, history, research overview and mitigation method in order to help understanding of the soiling.

• 반도체디스플레이기술학회지
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• 제10권2호
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• pp.109-113
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• 2011

Hot air flow simulations of the wet station dryer module for the solar cell cleaning were conducted. Air incident angles such as to the substrates ($45^{\circ}$), to the bottom ($90^{\circ}$), and to the wall ($135^{\circ}$) were considered. Based on the simulated velocity and temperature profiles, appropriate incident angle was proposed, and it was well matched to experimental results. Additionally, uniform and non-uniform air hole sizes of the tube were compared for the uniform air flow distribution through the batch.

• 한국컴퓨터정보학회논문지
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• 제28권5호
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• pp.1-8
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• 2023

이 논문에서는 스마트폰 또는 스마트 워치와 같은 스마트 디바이스를 이용한 IoT 기반의 배낭식 청소기 제어 시스템을 구현한다. 구현 시스템은 제어모듈 제작, 제어 모듈 프로그래밍, 스마트 디바이스 프로그래밍으로 이루어져 있다. 이 중 제어 모듈은 아두이노 나노, HM-10 BLE 모듈 및 릴레이를 기본 부품으로 하여 제작하였다. 스마트 디바이스는 제어 모듈과 양방향 BLE 통신으로 신호 교환을 하고 있으며, 이를 통해 청소기의 시작/정지를 제어 할 수 있게 한다. 배낭식 청소기는 사다리 등을 이용해야 하는 높은 장소를 청소할 때 효과적이다. 그러나 배낭식 청소기를 시작/정지하기 위해 메고 있는 청소기를 벗어야 하는 경우가 종종 발생한다. 이 논문에서 구현한 사물인터넷 기반의 청소기 제어 시스템은 청소기를 벗지 않으면서도 청소기의 시작/정지를 제어할 수 있도록 함으로써 문제를 근본적으로 해결하였다.