• International Journal of Air-Conditioning and Refrigeration
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• 제14권2호
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• pp.57-65
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• 2006

The blinds in the intermediate space are installed to block the direct solar radiation. As the blind divides the airflow of intermediate space into two parts, thermal performance of Double-Skin Facade(DSF) is affected by the blind position. Therefore the blind position should be planned with careful consideration in order to maximize the thermal performance of DSF. In this study, CFD was performed to analyze the effect of blind position in multistory-type DSF in variation of other DSF elements. The simulation results showed that the case with narrow depth of intermediate space and outlet on upper side of outer-facade, it is profitable to place blind as close as possible to the outer facade. In the other cases, the blind should maintain 0.15m distance from outer facade.

• 한국태양에너지학회 논문집
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• 제31권6호
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• pp.111-124
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• 2011

The objective of this study is to develop the blind control strategy and method which reduce negative effect of incoming daylight on visual comfort of occupants, minimize psychological anxieties caused by frequent motions of a blind, and maximize positive effect of incoming daylight by opening/closing of a blind. In previous researches on blind controls, major problem is that the time interval and amount of blind movement do not meet the control objective at the inflected zone of solar profile curve. To overcome these limitations revealed in theprevious researches, following tasks were performed in this study. i)To establish the control objective to accomplish the goal of this study. ii)To develop the control methods and algorithms which prevent glare on the work-plane at any time and which control the time interval and amount of blind movement to follow the control objective at various solar profile angle curves. This study proposed the control strategy and method that define the base control section implying the inflection point within the control objective zone and subsequently, divide the control sections for the residual time zones. The proposed strategy and method are found to increase the incoming daylight and solar irradiation by 0 to 15 %.

• Journal of Acupuncture Research
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• 제20권1호
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• pp.22-34
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• 2003

Objective : To ascertain whether the concept of the treatment side is associated with changes in the blind spot mapping that represents the brain function. Methods : Among the outpatients who visited to Department of Acupuncture & Moxibustion, National Medical Center from March 2002 to October 2002, we selected 40 clinical trial volunteers that showed right side physiological blind spot more enlarged than left, and underwent the examinations of Department of Opthalmology, National Medical Center for ruling out the pathological conditions. Physiological blind spot maps were used as an integer of brain activity before and after electroacupuncture application on the unilateral ST36 meridian point by dividing 40 subjects into two comparative groups for double-blind controlled study. Results: The significant changes in the blind spots were observed. Electroacupuncture application on the ipsilateral or contralateral ST36 of an enlargement cortical map were associated with the concept of determining the treatment side. In the case of electroacupuncture application on the ipsilateral side of an enlarged blind spot, there were decrease of $4.11{\pm}8.56cm$(17.3%) in blind spot perimetry length(p < 0.05). In the case of contralateral side, there were increase of $3.19{\pm}5.40cm$(13.7%) in blind spot perimetry length(p<0.05). The Differences were statistically significant(p<0.05). Conclusions: We found that eletroacupuncture application was associated with an increase or decrease in the brain function in the view of blind spot changes depending on the treatment side. These results suggest that the traditional acupuncture therapeutic strategy with determining the treatment side has clinical significance in the view of the brain function.

• 정보처리학회논문지D
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• 제16D권2호
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• pp.249-256
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• 2009

이 논문은 강원도의 u-Sports 시범 사업 일환으로 진행된 강원도 용평 스키장의 사각 지역 감시 시스템을 위한 효율적인 USN을 제안한다. 스키장의 사각 지역은 사람의 왕래가 뜸한 슬로프 외곽이나 관제의 시각 영역에서 벗어난 급경사 지역 등을 말하는데, 이런 지역에서 사고를 당하여 거동이 어려워지면 관제 센터에서는 이에 대한 신속한 대응이 어렵다. 이 논문의 사각 지역 감시 시스템은 다섯 개의 이미지 센서 노드가 설치된 사각 지역의 현재 모습을 제안된 USN을 통하여 중앙 관제 센터에서 실시간으로 관찰할 수 있을 뿐만 아니라, 사고 당사자가 주변에 설치된 긴급 버튼을 누를 경우에는 긴급 이미지 및 경보가 관제 센터로 즉시 전송되어 신속한 구조를 가능하게 한다.

• 한국건축친환경설비학회 논문집
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• 제12권6호
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• pp.531-542
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• 2018

Building energy demands have highly risen in modern society; thus, It is necessary to reduce building energy demands especially commercial buildings adopting a curtain wall architecture. Curtain wall architectures have a high ratio of windows which is a vulnerable in heat insulations as cladding. In order to complement insulation performance of windows in these buildings, there are various methods adopted often such as installing blinds, wing wall and films. There are two suggestions of this paper. 1) WWR (Window-to-Wall Ratio) makes a impaction of energy demands in buildings. 2) Another one is an efficiency of blind systems which are installed in buildings in order to reduce cooling demands. It is also critical to make fundamental model for low-energy building construction by processing a lot of simulation As a result by this study, 1) an external blind system is more useful for reducing cooling energy demands rather than an internal blind system. 2) Buildings which have a large window require more amount of cooling demands. In case of WWR 45%, it needs more cooling energy rather than WWR 15% model's 3) Adopting blind system would reduce energy demands. WWR 45% model with external blind systems reduces about 4% of cooling energy demands compared to same model without any blind systems.4) it is necessary to study an efficiency of blind systems combined with renewable energy and it will be possible to reduce more energy demand in building significantly.

• 한국통신학회논문지
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• 제22권11호
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• pp.2459-2469
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• 1997

본 논문에서는 다단계 반경-지향 알고리듬을 이용한 Fractionally Spaced(FS) 둥화기에 구성한다. Fractionally Spaced 등화기는 수신 신호를 심볼율보다 빠르게 표본화하여 처리하므로 표본화 순간에 민감하지 않는 특성을 갖는다. 다단계 반경-지향 얄고리듬을 적용한 Fractionally Spaced 등화기는 일반적인 블라인드 알고리듬을 적용 한 경우보다 Fractionally Spaced 등화기의 특성을 그대로 유지하연서 빠른 수렴 속도에서나 수렴 후 적은 자승 평균을 갖는다. 또한 여러개의 심볼율 동화기를 독립적으로 동작시키도록 구성된 다중 모델 Fractionally Spaced 블라인드 등화기에 다단계 반경-지향 알고리듬을 적용하면 빠른 수렴 속도를 얻는다.

• 한국생산제조학회지
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• 제20권1호
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• pp.67-73
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• 2011

In this study, the manufacturing technology of a folding blind rivet was developed through finite element analysis(FEA). Numerical simulations of the folding blind rivet used to join two components have been performed with the finite element method for the forging process design. To minimize the process and manufacture the folding blind rivet without defects, a variety of design rules were proposed. From the results of FEA applied process design rules, an optimal six-stage process was proposed. The finite element simulation results such as shape of the forged rivet, strain distribution and forging load were investigated for the usefulness of the forging process of the blind rivet. In addition, the experiments have been implemented and their results were compared to the analytic results.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2014년도 추계학술대회 논문집
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• pp.785-790
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• 2014

The purpose of this study is to identify the significant sound quality metric and compose the sound quality index of motor driven roller blind which is part of vehicle sunroof. Before subjective evaluation, sound characteristics of roller blind was analyzed and set the target operating sound for subjective evaluation. Thus, transfer sound of roller blind which has the characteristics of sound modulation was used for subjective evaluation. Linear regression was carried out by chosen Zwicker's metrics which are pointed by comments of jurors. Loudness and sharpness related metrics are prime metrics in sound quality index we composed. Effect of roller blind assay when it is attached to real vehicle was identified to evaluate the validity of index.

• 전기학회논문지
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• 제59권2호
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• pp.476-483
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• 2010

If the data are pre-whitened, then gradient adaptive algorithms which are simpler than higher order statistics algorithms can be used in adaptive blind signal estimation. In this paper, we propose a blind subband affine projection algorithm for multiple-input multiple-output adaptive equalization in the blind environments. All of the adaptive filters in subband affine projection equalization are decomposed to polyphase components, and the coefficients of the decomposed adaptive sub-filters are updated by defining the multiple cost functions. An infinite impulse response filter bank is designed for the data pre-whitening. Pre-whitening procedure through subband filtering can speed up the convergence rate of the algorithm without additional computation. Simulation results are presented showing the proposed algorithm's convergence rate, blind equalization and blind signal separation performances.

• 디지털콘텐츠학회 논문지
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• 제5권1호
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• pp.1-6
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• 2004

모바일 전자상거래 환경에서 컨텐츠를 구입하기 위한 지불 수단으로 전자화폐를 사용한다. 이때, 고객의 프라이버시를 보호하기 위해 서명의뢰자의 신원과 서명문을 연결시킬 수 없도록 익명성을 유지할 수 있는 서명 기법인 은닉 서명 기법을 이용하여 메시지의 서명을 생성한다. 본 논문에서는 CDHP기반의 타원곡선 알고리즘을 적용하여 통신횟수, 연산속도와 계산량 측면에서 기존의 은닉 서명 방식을 개선한 효율적인 은닉 서명 기법을 제안한다.