• 제목/요약/키워드: Relief method

검색결과 595건 처리시간 0.034초

유전자 알고리즘을 이용한 서변 가압장 수리구조물의 최적설계 (Optimal Design of Hydraulic Device at the Seobyun Pumping Station using Genetic Algorithm)

  • 정봉석;김주인;김상현;박남식
    • 한국수자원학회논문집
    • /
    • 제33권3호
    • /
    • pp.289-298
    • /
    • 2000
  • 본 연구에서는 대구광역시에 위치하고 있는 서변 펌프가압장에서 발생되는 수격압을 최소화하기 위해 사용되는 감압밸브와 공기밸브의 최적 위치결정과 감압밸브의 최적 열림정도를 도모하였다. 가압장에서 발생하는 펌프의 급정지에 기인한 수격현상은 특성선방법을 이용하여 모의를 하였다. 최적화 방법은 강력한 탐색능력을 가지고 있으며 특히 비선형 문제를 해결하는데 탁월한 성능을 가지고 있는 유전자 알고리즘을 이용하여 실시하였다. 유전자 알고리즘의 계산결과는 감압밸브의 열림시간을 적게 할수록 최고 압력수두의 완화에 효과적이고, 열림시간을 크게 할수록 최대부압의 완화에 효과적임을 알 수 있었다. 본 연구는 특성선방법을 기반으로 하는 관망부속물들의 해석이 유전자 알고리즘과 결합되어 관로내 관로부속물의 최적설계에 도움을 줄 수 있음을 보여준다.

  • PDF

The Basic Research on Depression and Anxiety according to Stress Coping by Age Group

  • Cho, Jung-Yeon;Kang, Byeol-Nim
    • 한국컴퓨터정보학회논문지
    • /
    • 제27권6호
    • /
    • pp.109-116
    • /
    • 2022
  • 본 연구는 스트레스와 생리 변인(면역, 염증)을 검증하기 이전, 스트레스 대처와 대처방법을 연령대별 우울, 불안 증세를 분석하여 기초 자료 제공을 위한 pilot test를 실시하였다. 비대면 방법으로 BDI 및 STAI를 연령대별(20대~70대) 비대면조사와 대면조사를 병행, 추적조사로 실시하였다. 20대부터 60대에서 대처방법에 따라 스트레스 해소 후 유의한 저하를 보였고, 불안은 모든 연령대에서 스트레스 해소 후 유의한 저하를 보였으며, 50대는 운동에 의한 스트레스 대처가 스트레스 해소 후 제일 낮게 나타났다. 본 연구의 결과를 바탕으로 심리 변인에 따른 기초 연구를 통해 실제 스트레스 대처방법에 따른 생리적 변인을 추가 검증하여 높은 스트레스 수준을 보이는 대상을 모집단으로 장기간의 운동 처치를 통해 운동요법에 의해서 우울 및 불안증세 개선과 면역, 염증 반응과의 상관관계 등을 연령대별, 대상별 적합한 스트레스 대처방법을 추가적으로 검증해야 할 것이다.

Pilot 공벽변형법에 의한 암반응력 측정 장비의 개발 (Development of Rock Stress Measurement Probe Based on The Pilot Hole Wall Deformation Method)

  • 이기하;석도 양이;구호본;김승현
    • 한국지반공학회:학술대회논문집
    • /
    • 한국지반공학회 2009년도 춘계 학술발표회
    • /
    • pp.1125-1132
    • /
    • 2009
  • The theory and a probe of the pilot hole wall deformation method, which is a 3-dimensional stress measurement method based on the stress relief principle, were developed. A pilot hole is drilled from the bottom of a borehole and the stress measurement probe is inserted into the pilot hole. The borehole is advanced as the overcoring and the changes in the radius of the pilot hole in three directions and in the axial lengths between the borehole bottom and the pilot hole wall along four axial lines are measured by cantilever type-displacement sensors. The differences between the displacements by the elastic stress analysis and those measured by using the probe were within 3% in the uniaxial compression test of an acrylic resin plate having a hole.

  • PDF

갓세르 신경절의 고주파 열응고술 -증례 보고- (Radiofrequency Thermocoagulation of the Gasserian Ganglion -A case report-)

  • 김태성;정성주;김현수;김광민
    • The Korean Journal of Pain
    • /
    • 제10권1호
    • /
    • pp.82-85
    • /
    • 1997
  • Destruction of the gasserian ganglion can be carried out by creating a radiofrequency lesion under biplanar fluoroscopic guidance. This procedure is reserved for patients who have failed various interventions for intractable trigeminal neuralgia including retro-gasserian injection of glycerol and whose physical status otherwise precludes more invasive neuro-surgical treatments such as microvascular decompression. Radiofrequency thermocoagulation of the gasserian ganglion provides a safe method of achieving long-standing relief from trigeminal neuralgia with low risk. This technique is currently emerging worldwide as the surgical treatment of choice for trigeminal neuralgia. Recently we performed a successful radiofrequency gasserian ganglionotomy, without any complication, under fluoroscopic guidance. The procedure was successful and complete pain relief was achieved for a patient who already had treatments of various interventions including microvascular decompression but never experienced pain relief.

  • PDF

권진규 '부조(浮彫)'의 이전 및 복원작업 (Transfering and Restoration of Kwon's 'Relief')

  • 김주삼
    • 한국문화재보존과학회:학술대회논문집
    • /
    • 한국문화재보존과학회 2001년도 제14회 발표논문집
    • /
    • pp.35-40
    • /
    • 2001
  • 벽화나 건물벽에 장식한 부조작품들은 건축물의 일부라는 특성을 가지고 있다. 따라서 여타 예술 작품과는 달리 현재의 위치에서 보존관리를 하는 것이 가장 합당한 방법일 것이다. 그러나 이들 작품의 보존을 위해 적절한 보존환경이 제공되는 곳으로 이전을 해야 하는 불가피한 경우가 발생하게 된다. 따라서 이러한 작품들을 이전해야 할 경우 충격이나 진동이 불가피하고 이들의 재질이 일반적으로 부서지기 쉽다는 것을 고려하여 작업 중 훼손을 방지하는 조치에 더 많은 주의를 기울여야 한다. 본 고에서는 주택 재개발 사업에 따라 철거위기에 놓여 있는 권진규 '부조'를 대상으로 부조작품의 이전에 대해 언급할 것이다. 특히 훼손 방지차원의 보호조치와 포장방법을 중심으로 한 이전 전과정과 복원작업을 소개하였다.

  • PDF

Clinical Efficacy of Endoscopic Pancreatic Drainage for Pain Relief with Malignant Pancreatic Duct Obstruction

  • Gao, Fei;Ma, Shuren;Zhang, Ning;Zhang, Yingchun;Ai, Meina;Wang, Bing
    • Asian Pacific Journal of Cancer Prevention
    • /
    • 제15권16호
    • /
    • pp.6823-6827
    • /
    • 2014
  • Objective: This study was conducted to investigate the efficacy of pancreatic drainage for pain relief in advanced pancreatic cancer. Method: Seventy-one patients with pancreatic carcinoma were divided into two groups: dilated and non-dilated pancreatic ducts. All patients underwent endoscopic retrograde cholangiopancreatography (ERCP), endoscopic biliary stenting and pancreatic stenting. Visual Analog Scale (VAS) scores, pain remission rates and survival time were evaluated during follow-up. Results: The post-ERCP VAS score of the dilated group was lower than that of the non-dilated group at 1 and 3 months post-ERCP. There was no difference at 6 months. The pain remission rate in the dilated duct group was significantly higher than that in non-dilated duct group in 1 and 3 months post-ERCP. The median survival times were 8.17 and 8.22 months respectively. Conclusion: Endoscopic pancreatic drainage can relieve pain of advanced pancreatic cancer accompanied by safe dilation of the pancreatic duct.

Effects of 20% Aluminum Chloride in Axillary Hyperhidrosis not Accompanying Osmidrosis

  • Kim, Seok-Won;Lee, Seung-Myung
    • Journal of Korean Neurosurgical Society
    • /
    • 제37권4호
    • /
    • pp.272-274
    • /
    • 2005
  • Objective: Surgical treatment of focal axillary hyperhidrosis is often unsatisfactory because of compensatory hyperhidrosis. The purpose of this study is to evalute the effect of decreased sweating production using 20% aluminum chloride on axillary hyperhidrosis. Methods: From February to December, 2002, 10 patients (mean age 25.2 male 2, female 8) with clinical diagnosis of axillary hyperhidrosis were treated by 20% aluminum chloride solution. Until the desired degree of symptom relief was obtained, they were educated to apply every day and thereafter, the agent would be applied as often as is necessary. We analyzed patient's satisfaction and application time at onset of desired dryness, application interval to maintain the relief of symptom and side effects. Results: Aluminum chloride solution was effective in treatment of axillary hyperhidrosis showing excellent result in 60% of patients and good in 40%. Application time at onset of desired dryness ranged from 1 to 6 days(mean 3 days). Application interval to maintain the relief of symptom ranged from 5 to 45 days(mean 12 days). There were no significant complications but just mild irritation and miliaria in seven patients. Conclusion: 20% aluminum chloride solution is the simple, safe and less expensive method for initial treatment for axillary hyperhidrosis not accompanying osmidrosis.

경동맥 화학색전요법 후 절대안정중인 환자의 요통완화를 위한 운동의 효과 (Effects of Exercise on Relief of tow Back Pain in Patients on Absolute Bed Rest after Trans-Arterial Chemoembolization (TAE))

  • 고은주;채영란;이동숙
    • 기본간호학회지
    • /
    • 제15권2호
    • /
    • pp.171-177
    • /
    • 2008
  • Purpose: The aim of study was to identify the effects of exercise on the relief of low back pain in patients on absolute bed rest after TAE. Method: A nonequivalent control group pretest-posttest design research design was used. The participants were 43 patients who had received TAE in a university hospital; patients in the experimental group (21) received both exercise therapy and general post-op nursing care and in the control group (22) only the latter. The exercise program used in this study was modified from exercise for post CABG to exercise for post TAE, which deflect the movement of thigh in which the catheter was inserted, the lumbar region of the back and pelvis. Results: First, Low back pain scores in the experimental group were lower than the control group. Second, The first dose of analgesics in the experimental group was delayed compared to the control group. Third, There was no significant difference in bleeding complications between the experimental group control groups. Conclusion: The results suggest that the exercise program used in this study is effective for relief of low back pain in patients on absolute bed rest after TAE.

  • PDF