• 사상체질의학회지
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• 제9권1호
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• pp.25-101
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• 1997

The physiologic and pathologic theories of "The Yellow Emperor's Canon of Internal Medicine (黃帝內經)" were based on yin-yang theory. It has been an important constituent of traditional Chinese medicine, and the eight principal syndromes have been main guidelines in diagnosis and treatment. Recently it had an great influene on the formation of the pathophysiology of Constitutional medicine. Therefore each constitution menifests special pathophysiologic propriorities of the eight pricipal syndromes, especially specific to one's constitution. So we can recognize specific patterns of the yin and yang, cold and heat, exterior and interior, deficient and excessive syndromes through a series of processes distinguishing one's constitution. The theory of the Constitutional medicine, however, has contained those achievements in a new angle and view the problem from a little different standpoint. The dynamic relationships inevitably have caused certain changes and distortions in the meaning and application of eight principles. These are a progress in medical science, and this advance is the stirring venture of Lee jaema. This thesis has intended to show the delicate relationship between the two, and investigate into these "changes and distortions".

• 설비공학논문집
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• 제20권12호
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• pp.789-794
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• 2008

Recently, much attention has been paid in the field of defrosting because clear windshield in vehicle without effecting the thermal comfort is realized essentially. Then in winter, defrosting performance is one of the important factors in vehicle design to make certain driver's view. In this study, the velocity profile, temperature distribution and frost melting pattern on the windshield screen have been predicted in three dimensional geometry of an automobile interior. Numerical analyses predict a detailed description of fluid flow and temperature patterns on the inside windshield screen, utilizing the flow through defroster nozzle. Numerical prediction established a good defrosting performance with the standard distance ratio and the defroster nozzle angle ranging from $30^{\circ}$ to $40^{\circ}$, which satisfy the condition of National Highway Traffic Safety Administration (NHTSA) completely.

• KIEAE Journal
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• 제5권3호
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• pp.3-9
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• 2005

Venetian blinds are used with windows to improve the uniformity ratio of illuminance and interior daylighting distribution under direct sunlit conditions. The main objective of Venetian blinds shading system is to obstruct direct sunlight and at the same time allow daylight to penetrate into the room. Venetian blinds would have greater effect on the interior daylighting condition under clear sky which has both skylight and sunlight than overcast sky which has only skylight. However, due to the lack of data, design and evaluation tools, it is difficult for architects to choose or install venetian blinds during the building design stages. The purpose of this study was to develop an analysis method for shading and daylighting effects of Venetian blinds using the RADIANCE program. The major variables related to the venetian blinds included blinds's slat angle and the ratio of slat width to window height, the radius slat of curvature and the building azimuth. In this study, a series of parametric physical mock-up model measurements and genblinds command in the RADIANCE simulations. The results of this study will provide building designers with the design data at early design stages.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1996년도 추계학술대회 논문집 학회본부
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• pp.299-301
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• 1996

Recently, as a result of the progress in power electronics and magnet technology, the applications of inverter fed BLDC Motor have increased for industry and home appliance. Also because of the high efficiency, good acoustic noise characteristic, BLDC Motor applications are growing. However, BLDC Motor requires position sensor, which has many problems such as high cost, more space and difficult to install. Therefore, sensorless control algorithm is being studied. In this paper, sensorless algorithm for interior permanent magnet BLOC motor adaptable for home appliance is proposed. The maximum torque per amp operation with advance angle considering load torque and speed was simulated and verified through the experiment.

• 한국실내디자인학회논문집
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• 제18권1호
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• pp.19-26
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• 2009

Aalto designed his own modern architecture in comparison with other modern architects of his days. It is because Aalto went beyond the principle of dogmatic functionalism based on his attitude not to copy images of functionalism but to fulfill function of the building. He decided architectural form and space according to logical basis including the effective use of light and sound. Vuoksenniska church, as is called the most exceptional and notable church in his works, was designed based on the fulfillment of program. As he knew that the program needed the extension of the main church space into social areas, he put emphasis on individuality of space rather than the wholeness of space. Sound and light analysis of Vuoksenniska church shows that Aalto tried to have adequate environment of each space at the start and Integrate them later. The spatial configuration of Vuoksenniska church shows that the individuality of space has priority over the wholeness of spaces. Discordance between roof form and ceiling is the best example for this matter. Aalto designed various windows that have different sizes, figure and location to induce desirable light for each space of the church. He also adjusted the shape of the ceiling and the angle of wall for a effective sound transmission. This result indicates that he knew the activity of the church is normally confined to one weekly morning and the whole space Is hardly used as a religious purpose.

• 전력전자학회논문지
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• 제16권1호
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• pp.38-43
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• 2011

본 논문에서는 슬라이딩 모드 관측기를 이용하여 IPMSM(Interior Permanent Magnet Synchronous Motor)의 센서리스 제어의 기동특성에 관한 연구를 수행하였다. 역기전력을 추정하는 센서리스 제어 방식은 초기 구동 시 회전자의 위치를 알 수가 없으므로 Open-Loop알고리즘을 이용하여 강제로 모터를 구동시킨다. 이 방법은 Open-Loop에서 Closed-Loop로 제어되는 시점에 부하의 상태에 따라 기동 특성이 변하는 문제점이 발생 할 수 있다. 본 논문에서는 부하에 따라 기동 특성에서 야기되는 문제점을 검토하고 그 해결책을 제시한다. 제시된 방법은 6극 600W급 IPMSM을 이용하여 시뮬레이션과 실험을 통해 검증한다.

• 한국터널지하공간학회 논문집
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• 제15권5호
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• pp.497-504
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• 2013

본 연구에서는 도로터널 조명설계에 있어서 내부조명의 밝기 수준에 영향을 미치는 갱구부 경관을 L20법 측정을 통하여 수치 해석적으로 고찰하였다. 갱문 형식별로 휘도인자를 추출하고 갱구부 주변시설물의 재료적 특성이 미치는 영향을 평가하기 위해서 동영상 휘도계 HI-LAND ELF SYSTEM과 면휘도계 LMK Mobile advanced로 촬영하여 휘도 분석을 하였다. 국내의 터널은 대부분 산악지대에 분포되어 L20각도 내에서 휘도가 가장 높은 하늘이 점하는 비율이 거의 없으며, 터널 입구주변이나 도로노면에 의한 휘도가 대부분을 차지하고 있다. 그러나, L20각도 내에서 갱문의 면적이 넓게 보이는 면벽식의 경우는 주변이나 노면에 비해 밝은 휘도를 나타냄으로서 터널내 경계부 휘도를 높이는 요인이 되고 있으며, 터널 갱구주변의 도로시설물도 휘도에 영향을 미치고 있음을 파악하였다. 따라서, 휘도기반의 터널조명 설계 시 갱문의 형식 및 갱구부 주변시설물에 대한 면적, 재료, 색상 등이 외부휘도에 영향을 미치고 이로 인해 터널 내부조명의 밝기 레벨 설정에 영향을 주는 요인이 되므로 갱구부 경관설계 시 이에 대한 검토가 반드시 필요한 것으로 나타났다.

• 대한기계학회논문집A
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• 제40권2호
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• pp.229-236
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• 2016

본 연구에서는 자주박격포의 다물체동역학 모델을 만든 뒤, 포탄의 탄도학을 고려하여 시뮬레이션 하였다. 자주박격포 모델은 박격포 모델 및 차량 모델로 구성하였으며, 상용 다물체 해석 프로그램인 RecurDyn 을 사용하였다. 차량 모델은 6 자유도 강체플랫폼으로 모델링 하였으며, 박격포 발사 직후의 움직임에는 강내탄도학을 적용하였다. 강내탄도학 해석의 결과를 바탕으로, 포신을 떠난 후의 강외탄도 해석을 수행하였다. 몬테카를로 기법을 활용한 반복 해석으로 발사각과 차량 동특성에 의한 변동이 고려된 탄착점의 분산도를 구하여 사격정확도를 제시하였다.

• 건축역사연구
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• 제22권6호
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• pp.7-22
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• 2013

The purpose of this paper is to study on the spatial characteristics from the "The Holy Trinity" fresco painted by Masaccio in the early Renaissance paintings. The results of this study are as follows. 1. The elevation composition of the "The Holy Trinity" fresco is divided into the upper and lower structure through horizontal axis on horizontal line around vanishing point. The upper structure is composed of vertical axis formed through the disposition of the "Trinity" elements and horizontal axis on horizontal line. The lower structure is composed of the sarcophagus and skeleton in such inside and the altar supported through circular columns of left and right. 2. The section composition of the "The Holy Trinity" fresco is composed of the ceiling structure of cylindrical-shaped vault on upper part around basic square floor plan that is interior space and upper structure. The exterior space and lower structure is placed with sarcophagus in inner part that altar and step is projected as same height and width in the outside direction. 3. The basic floor composition of the "The Holy Trinity" fresco is planned by square shape around structural columns that is placed at corners as symmetry through transverse, longitudinal and diagonal axis. The whole floor composition planned through the altar and step that is in exterior space at front, the apse of round form at rear part and the structure of the middle story concept at interior. 4. The visual aspect of the "The Holy Trinity" fresco is composed of the stable balance in relation with distance and height because the interior and exterior space as well as the upper structure and lower structure is formed by regular proportion system. The elevation angle of visual range was planned to view in detail generally or partially the architectural composition system and element, characters through proper visual distance, center and position.

• 전자공학회논문지
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• 제50권1호
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• pp.254-260
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• 2013

본 논문에서는 IPMSM(Interior Permanent Magnet Synchronous Motor)의 약계자 제어에 따른 전자기적특성을 다룬다. IPMSM의 운전 속도 영역을 확장하기 위해 약계자 전류제어가 일반적으로 사용되며 약계자 운전 중에는 전기강판의 자기적 포화에 의해 쇄교자속의 왜형이 발생하게 된다. 따라서 정현파 전류 입력을 위한 전압 파형은 왜형을 갖게 된다. 약계자 전류 증가에 따라 이러한 전압 왜형은 더욱 크게 발생되며 기본파 전압에 비해 상당한 크기의 고조파 전압을 필요로 하게 된다. 이러한 현상을 ２차원 유한요소 해석을 이용하여 확인하였으며 시험을 통해 검증하였다. 본 연구 결과를 통해 IPMSM의 특성 분석에 사용되는 d-q축 등가회로 파라미터 즉, 영구자석에 의한 쇄교자속, d－q축 인덕턴스는 산정 단계에서 기본파 물리량으로 계산되므로 약계자 운전시 발생하는 전압 왜형을 예측할 수 없음을 알 수 있다. 결국 주어진 전압에서 얻을 수 있는 속도 예측에 오차를 수반하게 되며 전압고조파에 대한 대책이 필요하다.