• 제목/요약/키워드: dead space

검색결과 277건 처리시간 0.031초

대만 치치 지진 메모리얼 - 접근과 설계과정 - (Chi-chi Earthquake Memorial Park, Taiwan - Approach and Design Process-)

  • 김정윤
    • 한국조경학회지
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    • 제32권5호
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    • pp.129-138
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    • 2004
  • Cherishing the dead is based in sadness. Designing a memorial space therefore has an inherent challenge to evoke the feeling that is so personal and varied by providing a physical space. The tendency of memorials, especially in the US after the mid 20th century, has been to emphasis each dead individual, as seen at the Vietnam Veterans Memorial in Washington, D. C., the Oklahoma City National Memorial in Oklahoma City, and so forth. In the process of designing the memorial of the Taiwanese Chi-chi earth-quake, Cheng Kim Park Robidoux tried to set up a series of spaces through which not only the relatives of the dead but also unrelated visitors could have their own spatial experiences, private rituals and public events, so that they can finally build up a collective memory. Sky-Well consists of a large bamboo forest enclosing a void. Without a particular entrance and guiding system, visitors stroll and get lost in the bamboo forest before they find the central void. The horror they experienced during the earthquake is melted down into the motion and phenomenology of the bamboo forest whereas the central void is reinterpreted as an empty mind, where people find solace from the sky. Details, such as the bamboo wall to place commemorative flowers and lotus blossom paving, are echoing the theme of rebirth.

모래의 입도가 동적 특성에 미치는 영향 (Effects of Gradation on Dynamic properties of Sands)

  • 송정락;김수일
    • 한국지반공학회지:지반
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    • 제3권2호
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    • pp.7-16
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    • 1987
  • 흙의 동적 특성은 공극비, 구속압력, 입도 등의 여러가지 요인에 의해서 변화한다. 본 연구에서는 모래의 입도가 그 동적 특성에 미치는 영향을 구속압력과 공극비의 영향과 함께 실험적으로 살펴 보았다. 실험 결과, 전단탄성계수(Shear Modulus)와 감쇠비 (Damping Ratio)는 공극비가 감소 함에 따라, 그리고 구속압력이 증가함에 따라 각카 증가 및 감소하였다. 한펀, 실트 크기의 석영분말을 섞어 입도를 변화시켰을 때, 시료의 전단탄성계수와 감쇠비는 석영 분말의 함유량이 증가함에 따라 각각 감소 및 증가하였다. 여기서는 이 현상을 "유효 접촉수"와 "사공간"의 개념을 써서 미시적으로 살펴보았다. 개념을 써서 미시적으로 살펴보았다.

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폐결핵환자에서 폐절제술이 폐기능에 미치는 영향에 관한 연구 (The Effects of Pulmonary Resectional Surgery for Cavitary Tuberculosis on Ventilation and Arterial Respiratory Gases)

  • 이현우
    • Journal of Chest Surgery
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    • 제6권1호
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    • pp.7-14
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    • 1973
  • Ventilatory functions and arterial respiratory gases were studied in 24 patients who underwent resectional surgery for pulmonary tuberculosis. Postoperative measurements were made 24 hours, 72 hours and 7 days after surgery and the results were compared to preoperative values. Twenty-four hours postoperatively, there occurred striking increase in respiratory rate, minute ventilation, dead space ventilation and dead space tidal volume ratio, and the increase in minute ventilation was caused primarily by the increase in respiratory rate. However, alveolar ventilation, oxygen consumption, carbon dioxide elimination and respiratory quotient showed no significant postoperative changes although two of the last values showed slight decreases 24 hours after surgery. The lowest arterial oxygen saturation level was obtained 24 hours postoperatively followed by gradual rises but not to the preoperative levels until 7 days after surgery. A decreased arterial carbon dioxide tension with elevated pit was noted 24 hours after surgery, which returned to the preoperative level on the following measurement.

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인공기복으로 치료한 폐엽절제후 발생된 사강과 공기누출 -1례 보고- (Treatment of Dead Space with Prolonged Air-leak after Lobectomy by Artificial Pneumoperitoneum -A case report-)

  • 이응석;윤용한;백완기;손국희;김광호;안승익
    • Journal of Chest Surgery
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    • 제34권7호
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    • pp.578-581
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    • 2001
  • 5년전에 위암으로 위아전절제술의 병력이 있는 59세 남자환자가 우폐 하엽에 선암종으로 진단 후 우중하엽의 이엽절제술을 받았으나, 수술 후 21일째까지 지속되는 공기누출과 사강문제가 해결되지 않아 수술후 22일째 인공기복형성술을 실시하였다. 인공기복술후 14일만에 흉관을 제거할 수 있었다.

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폐 aspergillosis의 외과적 치료 - 5예 보고 - (Surgical Treatment of Pulmonary Aspergillosis - 5 Cases -)

  • 신형주
    • Journal of Chest Surgery
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    • 제24권1호
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    • pp.64-71
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    • 1991
  • Pulmonary aspergillosis is a rare disease, most commonly presenting pre-existing cavitary disease. In Department of thoracic and cardiovascular surgery, Chonbuk National University, 5 patients have been recognized as having this disorder from 1988 to 1990, June. Of the 5 patients, three were female and two were male. Age ranged from 30 to 53 years, the average age was 38.4 years. The most common presenting symptoms were blood-tinged sputum, hemoptysis, coughing, and chest pain Pulmonary tuberculosis occupied 8-% of underlying pulmonary disease. The locations of lesion were right upper lobe in 3 cases, left upper lobe in 1, and right lower lobe in l. All of these patients were treated by surgical resection. The operative procedures were as follows: lobectomy, 3 cases; segmentectomy, 1 case; lobectomy and segmentectomy, 1 case. There was no death in early and late postoperative period. Empyema and dead space developed in two cases, respectively. The postoperative empyema was treated with open thoracostomy and the dead space was carefully observed. During follow-up, there was no recurrence.

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피복의 소비행동과 가정 배경에 관한 실태조사 (A survey on the clothing consumption activity and the home background)

  • 남이경
    • 대한가정학회지
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    • 제25권2호
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    • pp.1-11
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    • 1987
  • The purpose of the study is to researdch clothing consumer behavior of men and women over age of 20 years and to find out the reasonable maximum utility on clothing behavior. The factors are eight distinguished parts such as sex, age, monthly income, occupation, floor space, number of room, number of family and place of residence. A common questionaire is introduced to survey the clothing consumption activity and the home background. Sources to measure them are gathered in the whole country including major cities. The questionaire of 915 correspondents of 368 males and 547 females is investigated for this research. Some of the data are analyzed by correlation, frequency, percentage, mean, and S.D. Others are investigated by ANOVA Test, x2-Test, and Multiple Range Test. The results from the survey are as followings: 1. Only four factors such as sex, monthly income, occupation, and floor space have a significance in the clothing consumption activity. 2. This survey reveals that many cloths have been kept in dead storage and concerns of utility have risen high. 3. This survey has shown that the correspondents have deep concerns about using colthing exchange store, clothing lending store, and trunk room to utilize dead storage clothing efficiently.

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자이로 센서를 이용한 이동로봇 Odometry 오차 보정에 관한 연구 (Odometry Error Correction with a Gyro Sensor for the Mobile Robot Localization)

  • 박시나;홍현주;최원태
    • 대한전기학회논문지:시스템및제어부문D
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    • 제55권2호
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    • pp.65-67
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    • 2006
  • To make the autonomous mobile robot move in the unknown space, we have to know the information of current location of the robot. So far, the location information that was obtained using Encoder always includes Dead Reckoning Error, which is accumulated continuously and gets bigger as the distance of movement increases. In this paper, we analyse the effect of the size of the two wheels of the mobile robot and the wheel track of them among the factors of Dead Reckoning Error. And after this, we compensate this Dead Reckoning Error by Kalman filter using Gyro Sensors. To accomplish this, we develop the controller to analyse the error components of Gyro Sensor and to minimize the error values. We employ the numerical approach to analyse the error components by linearizing them because each error component is nonlinear. And we compare the improved result through simulation.

인버터 전압왜곡 보상방법의 분석 및 적용상의 문제점에 대한 연구 (Modeling and Compensation of Voltage Source Inverter Nonlinearity)

  • 김남수;김현배;박기헌
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2005년도 제36회 하계학술대회 논문집 B
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    • pp.1352-1354
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    • 2005
  • In this paper, an improved dead time compensation method which is concerned about dead time and extra time in Pulse-Width-Modulation(PWM) period is presented comparing the existing dead time compensation. The voltage drop across the switches are modeled excluding effect of stray capacitor. A low pass filter(LPF) is adopted for accurate detecting of current polarity. The method is based on Space-Vector-Pulse-Width-Modulation(SVPWM). All simulation results are presented using MATLAB and Simulink.

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