• Title/Summary/Keyword: window operation

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Intelligent and Responsive Window Opening-Closing Operation Process for Carbon Dioxide(CO2) Management of Secondary School Classroom (중등학교 교실의 이산화탄소(CO2) 관리를 위한 지능형 창호개폐 작동 프로세스)

  • Choi, Yoon-Young;Lee, Hyun-Soo
    • Journal of the Korean Institute of Educational Facilities
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    • v.25 no.4
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    • pp.19-30
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    • 2018
  • The school classroom is a common living place where students spend 7 to 14 hours a day to prepare for their careers. Therefore, if the ventilation of the classroom is not properly performed, it may lead to the deterioration of learning ability due to the unclear air. The concentration of carbon dioxide in the classroom is reported to be high, and the increase in carbon dioxide concentration has a negative effect on the learner's academic performance. In this context, the purpose of this study is to propose a methodology for intelligent and responsive window opening-closing operation process that can reduce the concentration of $CO_2$ in the classroom in order to build a support space that can create an effective teaching-learning environment for adolescents. The specific objectives are as follows. First of all, we define the concept of window opening-closing operation. Secondly, twe develop the operation process of window opening-closing. Thirdly, we develop an algorithm for real-time window opening and closing (process) (Window Opening-Closing Operation Process). Finally, we verify the intelligent responsive window opening-closing operation process through developing examples of window opening-closing operation process using the parametric design program. This study is a preliminary study to develop algorithms necessary for window opening-closing operation. Based on the first-order algorithm, We simulated window opening-closing operations according to a hypothetical scenario. As a result, This study can show that the window is open and close depending on the $CO_2$ concentration, but the $CO_2$ concentration in the room is higher than outdoors. Consequentially, we suggest that it is necessary to develop an algorithm to supplement these results because window is often not working when the temperature difference between indoor and outdoor in winter is large.

Design and Implementation of Fast Scalar Multiplier of Elliptic Curve Cryptosystem using Window Non-Adjacent Form method (Window Non-Adajcent Form method를 이용한 타원곡선 암호시스템의 고속 스칼라 곱셈기 설계 및 구현)

  • 안경문;김종태
    • Proceedings of the IEEK Conference
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    • 2002.06b
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    • pp.345-348
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    • 2002
  • This paper presents new fast scalar multiplier of elliptic curve cryptosystem that is regarded as next generation public-key crypto processor. For fast operation of scalar multiplication a finite field multiplier is designed with LFSR type of bit serial structure and a finite field inversion operator uses extended binary euclidean algorithm for reducing one multiplying operation on point operation. Also the use of the window non-adjacent form (WNAF) method can reduce addition operation of each other different points.

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Composition of Operation Window in Domestic Burner Management System for Thermal Power Plant and Software Explanation (화력전소용 버너관리 시스템 운전화면 구성과 Software 설명)

  • Shin, Mahn-Su;Kim, Byung-Chul;Kang, Jong-Chul
    • Proceedings of the KIEE Conference
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    • 2001.11c
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    • pp.323-326
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    • 2001
  • In this Paper, we are trying to think over the operation window of application to a domestic burner management system and the softwares. The detailed contents are the power plant system overview and the integration of operation window and the software[man-machine interface software and logic editing software] digest and the difficulty in changing the burner management system.

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Composition of operation window in a domestic boiler distributed control system (국내 발전소 보일러용 분산제어시스템 운전 화면 구성)

  • Shin, Mahn-Su;Byun, S.H.;Park, Du-Yong
    • Proceedings of the KIEE Conference
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    • 2001.07d
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    • pp.2027-2029
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    • 2001
  • In this paper, we are trying to think over operation window of application to a domestic boiler distributed control system. The detailed contents are a plant system overview, and operation window overview, difficulty in changing control system, vision.

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Aortopulmonary Window Associated with Tetralogy of Fallot - Report of a case - (활로 사징증과 동반된 대동맥 폐동맥 중격 결손증 - 1례 보고 -)

  • 김한용
    • Journal of Chest Surgery
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    • v.23 no.4
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    • pp.776-781
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    • 1990
  • The association of aortopulmonary window and tetralogy of Fallot is rare. The aortopulmonary window lies usually between the left side of the ascending aorta and the right wall of the pulmonary artery just anterior to the origin of the main pulmonary artery. Recently, we experienced a case of aortopulmonary window associated with tetralogy of Fallot in a 4 years old male. Operation was done under the Impression of the tetralogy of Fallot. On operation, the anomaly was confirmed as aortopulmonary window[type 1] and tetralogy of Fallot. The aortopulmonary window was closed with Gortex patch via the main pulmonary artery and tetralogy of Fallot was repaired. Postoperative course was uneventful.

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Appropriate Choice of Window Function for Noise Reduction (잡음 감소를 위한 창 함수의 선택에 관한 연구)

  • 백문열
    • Journal of the Korean Society of Safety
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    • v.12 no.4
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    • pp.3-8
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    • 1997
  • This paper shows a performance estimation of windowing a single tone with added Gaussian noise and uniform noise. Signal-to-noise ratio can be determined by the ratio of the output noisy signal variance to the input noisy signal variance of a window. Standard deviation of noise is reduced by windowing Signal-to-noise ratio of the noisy signal is reduced by the windowing operation. Thus, performance of window function can be determined by this filtering operation that improved the signal-to-noise ratio.

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Numerical Analysis on the Coupled Operation of Ventilation Window System and Central Cooling System (창호일체형 환기시스템 및 중앙냉방시스템 연계 운영에 대한 수치해석적 연구)

  • Park, Dong Yoon;Chang, Seongju
    • Journal of Korean Society for Atmospheric Environment
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    • v.31 no.4
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    • pp.385-395
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    • 2015
  • This study evaluated indoor environmental characteristics in an office room equipped both with ventilation window system and central cooling system. Fresh air is supplied only by the central cooling system whereas indoor air is discharged outside through both ceiling diffuser and a ventilation window system. Numerical study is conducted by changing the volumetric flow rates of exhaust ports of each system. For estimating the performance of this coupled system, $CO_2$ concentration and Predicted Mean Vote (PMV) were calculated using Computational Fluid Dynamics (CFD) simulation. The more the ceiling diffuser exhausts indoor air, the more the $CO_2$ concentration decreases. However, when the ventilation window system exhausts more indoor air, thermal comfort level gets improved in the office room with cooling system. Therefore, when the ventilation window system is operated, the coupled operation with central cooling system should be considered for enhancing indoor air quality and thermal comfort, together.

Aorticopulmonary Window: one case report (대동맥중격결손증[수술치험 1예])

  • 최영호
    • Journal of Chest Surgery
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    • v.14 no.3
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    • pp.302-306
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    • 1981
  • Aorticopulmonary window is a rare anomaly among congenital heart disease. Various terms have been suggested including A-P window, A-P fenestration, fistula, aorticseptal defect etc. The defect lies usually between the left side of the ascending aorta and right wall of the pulmonary artery just anterior to the origin of the right main pulmonary artery. We have experienced one case of aorticopulmonary septal defect which was diagnosed as V5D with pulmonary hypertension in 1 4/12 year old, 7.2 Kg, male patient. Operation was done under the hypothermic cardiopulmonary bypass using 5t. Thomas cardioplegic solution. Vertical right ventriculotomy over the anterior wall of RVOT revealed no defect in the ventricular septum, and incision was extended up to the main pulmonary artery to find the source of massive regurgitation of blood through MPA. Finger tip compression of the aorticopulmanary window was replaced with Foley bag catheter balloon, and the $7{\times}10$ mm aorticoseptal defect located 15mm above the pulmonic valve was sutured continuously wih 3-0 nylon suture during azygos flow of cardiopulmonary cannula which was located distal to the window resulted massive air pumping systemically, and temporary reversal of pumping was tried to minimize cerebral air embolism. Remained procedure was done as usual, and pump off was smooth and uneventful. Postoperatively, patient was attacked frequent opistotonic seizure with no recovery sign mentally and p.hysically. Vital signs were gradually worsen with peripheral cyanosis and oliguria, and cardiac activity was arrested 1485 minutes after operation. Autopsy was performed to find the sutured window and massive edema of the brain.

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Constant Time Algorithm for the Window Operation of Linear Quadtrees on RMESH (RMESH구조에서 선형 사진트리의 윈도우 연산을 위한 상수시간 알고리즘)

  • Kim, Kyung-Hoon;Jin, Woon-Woo
    • Journal of KIISE:Computer Systems and Theory
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    • v.29 no.3
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    • pp.134-142
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    • 2002
  • Quadtree, which is a hierarchical data structure, is a very important data structure to represent binary images. The linear quadtree representation as a way to store a quadtree is efficient to save space compared with other representations. Therefore, it has been widely studied to develop efficient algorithms to execute operations related with quadtrees. The window operation is one of important geometry operations in image processing, which extracts a sub-image indicated by a window in the image. In this paper, we present an algorithm to perform the window operation of binary images represented by quadtrees, using three-dimensional $n{\times}n{\times}n$ processors on RMESH(Reconfigurable MESH). This algorithm has constant-time complexity by using efficient basic operations to route the locational codes of quardtree on the hierarchical structure of $n{\times}n{\times}n$ RMESH.

Efficient Median Filter Using Irregular Shape Window

  • Pok, Gou Chol
    • The Journal of Korea Institute of Information, Electronics, and Communication Technology
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    • v.11 no.5
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    • pp.601-607
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    • 2018
  • Median filtering is a nonlinear method which is known to be effective in removing impulse noise while preserving local image structure relatively well. However, it could still suffer the smearing phenomena of edges and fine details into neighbors due to undesirable influence from the pixels whose values are far off from the true value of the pixel at hand. This drawback mainly comes from the fact that median filters typically employ a regular shape window for collecting the pixels used in the filtering operation. In this paper, we propose a median filtering method which employs an irregular shape filter window in collecting neighboring pixels around the pixel to be denoised. By employing an irregular shape window, we can achieve good noise suppression while preserving image details. Experimental results have shown that our approach is superior to regular window-based methods.