• 대한한방부인과학회지
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• 제26권4호
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• pp.123-139
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• 2013

Purpose: Cold hypersensitivity is regarded to be associated with blood circulation. This study is aims to evaluate the effects and safety of oxygen chamber therapy on cold hypersensitivity by comparing the temperature and Visual Analogue Scale. Methods: 42 outpatients who visited ${\bigcirc}{\bigcirc}$ University Oriental Hospital from July 11th, 2013 to August 28th, 2013 were analyzed. Patients were subjected to thermometer, and those with thermal difference greater than $0.3^{\circ}C$ between upper arm and palm and also with more than VAS 4 of cold hypersensitivity were diagnosed with cold hypersensitivity. 42 outpatients diagnosed with cold hypersensitivity are divided into two groups, one is the experimental group consisted of 21 patients and other was control group consisted of 21 patients. The experimental group had oxygen chamber therapy 10 times for 4 weeks. Thereafter the effects of oxygen chamber therapy on cold hypersensitivity was analyzed with t-text using SPSS for Windows version 21. Results: After the oxygen chamber therapy, experimental group had considerable improvement on cold hypersensitivity, in consequence of decreasing rate of thermal difference and VAS of cold hypersensitivity. Ear deafness and hand numbness were reported as an adverse effects in experimental group, but there was no serious adverse effects. Conclusions: This clinical trial showed oxygen chamber therapy could be effective and safe to reduce cold hypersensitivity.

• Nuclear Engineering and Technology
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• 제38권5호
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• pp.455-458
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• 2006

The HANARO reactor has a vertical hole for a cold neutron source (CNS) in the heavy-water reflector tank, i.e., the CNS hole, which was considerably deformed during its welding to the horizontal cold neutron (CN) beam tube. This paper presents an investigation of the form of the CNS hole for the optimal design of the a vacuum chamber for the CNS. In addition, the installation method of the vacuum chamber into the CNS hole for minimizing the water thickness between the vacuum chamber and the nose of the CN beam tube is proposed.

• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2009년도 제33회 추계학술대회논문집
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• pp.97-100
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• 2009

한국형 발사체용 액체로켓엔진을 개발하기 위한 75톤급 연소기 기술검증 시제를 제작하여 수류시험 및 점화시험을 수행하였다. 기존의 연소기에 새롭게 도입된 기술인 점화, 막냉각, 산화제 선공급방식을 반영하기 위해 시험설비를 수정 및 개량하였다. 산화제 및 연료 수류시험을 통해 공급라인, 점화기 라인, 연소기의 수력학적 특성, 추진제 충전시간을 파악하여 점화순서를 결정하였다. 점화 cyclogram을 통해 점화기의 점화시험을 성공적으로 수행하였으며, 향후 연소시험을 위한 기초 자료를 습득하였다.

• 설비공학논문집
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• 제13권8호
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• pp.667-673
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• 2001

As an alternative cooling method to reduce environmental hazard, vortex tubes have been studied for energy separation into cold and hot streams. Hence, the experiments were carried out systematically to find the best ratio of vortex chamber diameter to tube diameter. Also, the work was don to investigate how inlet pressure and geometric ratios of vortex tube affected temperature differences at tow needs as ell as cooling capacity and cooling efficiency. The result showed that the maximum temperature differences at the both ends and the maximum cooling efficiency were obtained when the ratio of vortex chamber diameter was about 1.45, while the inlet pressure ws not higher than 0.7 MPa.

• 대한본초학회지
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• 제32권1호
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• pp.41-45
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• 2017

Objectives : The purpose of this study was to assume the origin and daily dose of Allii Chinensis Bulbus in Treatise on Cold Damage Diseases and Prescriptions of the Gold Chamber. Methods : I assumed the origin with Book of Materica Medica such as Illustration and Classic of Materia Medica(本草圖經), Illustration and Consideration of Plant's Name and Reality(植物名實圖考), The Korean Herbal Pharmacopoeia Forth Edition, Annotation of Hangeul Treatise of Cold Damages Diseases, and daily dose based on general principle applied on dose of Treatise on Cold Damage Diseases. Results : In Treatise on Cold Damage Diseases and Prescriptions of the Gold Chamber, the original species of Allii Chinensis Bulbus was Allium chinense G. Don. It was to be measured with weight. It was too big to write on size due to it's 10~30mm length and 3~12mm in diameter. And due to irregular size, it can't be written on number, too. Daily dose of Allii Chinensis Bulbus in Whaeyeok-san(回逆散), Gwalluhaebaekbanha-tang(栝樓薤白半夏湯) was 3 Ryang(兩), which was the most common case in Treatise on Cold Damage Diseases. And that in Gwalluhaebaekgyeji-tang(栝樓薤白桂枝湯), Gwalluhaebaekbaekju-tang(栝樓薤白白酒湯) is 8 Ryang(兩), which was the largest dose as dried herb in Treatise on Cold Damage Diseases Conclusions : The original species of Allii Chinensis Bulbus was Allium chinense G. Don. The daily dose of Allii Chinensis Bulbus was 3 Ryang(兩)(19.5g) in Whaeyeok-san and Gwalluhaebaekbanha-tang, and was 8 Ryang(兩)(52g) in Gwalluhaebaekgyeji-tang and Gwalluhaebaekbaekju-tang.

• 한국산학기술학회논문지
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• 제13권12호
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• pp.6013-6021
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• 2012

냉감을 느끼지 않을만한 온도에서 신체부위에 차가움을 느껴 일상생활이 곤란함을 호소하는 냉증환자가 늘어남에도 불구하고, 정확한 진단기구와 뚜렷한 치료기기가 없는 것이 사실이다. 그러므로 본 논문에서는 다양한 센서를 통하여 냉증을 측정 및 진단하고 환자의 냉증정도에 맞게 적응적으로 산소압과 치료시간을 조정할 수 있는 산소챔버를 냉증치료용 의료기기로 제안 설계한다. 특히 의사의 진찰과 문진을 통해 경험에 의존하던 기존의 주관적인 냉증 진단 방법에서 벗어나, 첨단 복합 생체센서의 측정데이터를 임상실험에 근거한 임계치를 바탕으로 비교함으로써 냉증을 정확히 진단하는 방법을 소개한다. 최종적으로 냉증의 진단 단계에 따라 적응적으로 산소량을 제어함으로써 냉증을 효과적으로 치료하는 산소챔버를 구현하여 한의학 의료기기의 과학화와 대중화에 기여하고자 한다.

• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2010년도 제34회 춘계학술대회논문집
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• pp.25-28
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• 2010

한국항공우주연구원에서는 30톤급 액체로켓엔진 연소기 개발 기술을 바탕으로 설계 제작된 75톤급 기술검증시제의 수류시험 및 점화시험을 수행하였다. 수류시험을 통해 시험설비 공급라인의 수력학적 특성 및 냉각 케로신 충전시간을 파악하였다. 수류시험 결과로 점화절차를 결정하여, 점화시험을 성공적으로 수행하였다. 점화시험을 통해 획득한 자료와 시험 기법은 향 후 연소시험을 위해 활용될 것이다.

• 대한전기학회논문지:전기기기및에너지변환시스템부문B
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• 제54권11호
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• pp.519-526
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• 2005

This paper presents computer simulation results for developing new type of SF$_{6}$ Circuit Breaker in terms of cold gas flow after small current interruption. This cold gas flows down a nozzle into the chamber of a circuit breaker. There are many difficult problems in analyzing the gas flow due to complex geometry, moving boundary, shock wave and so on. When predicting the dielectric capability of a gas circuit breaker after interruption, the gas pressure and density distributions due to the cold gas must be considered in addition to the electrical field imposed across the gas. A self-coded computational fluid dynamics (CFD) program is used for the simulation of cold gas flow in order to evaluate the electrical field characteristic across open contacts and transient characteristics of insulations after small current interruption.

• 한국연소학회:학술대회논문집
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• 한국연소학회 2007년도 제34회 KOSCO SYMPOSIUM 논문집
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• pp.168-175
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• 2007

Ash melting chamber is one of the key facility of the pyrolysis-melting incineration system, and it should be designed and operated very carefully for avoiding solidification of slag. In this study, an example of numerical and experimental scale-up process of the melting chamber, in which high speed air is injected to the molten slag and generates bubbles, which enhances agitation of the slag and char combustion, is presented. Cold flow test, combustion and melting test in a lab-scale (30 kg/hr) chamber and a pilot scale (200 kg/hr) chamber. Minimum energy for maintaining molten slag is derived, and it was found that the molten slag can be maintained efficiently by concentrating heat into the bubbling slag.

• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2011년도 제37회 추계학술대회논문집
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• pp.807-812
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• 2011

한국형발사체 1단에 사용될 75톤급 액체로켓엔진 연소기의 기술검증시제를 설계, 제작하여 연료수류시험을 수행하였다. 가압압력을 조절하여 연료 유량을 변경함으로써 주어진 유량에서 발생하는 연소기 재생냉각 채널에서의 압력 손실을 측정하였다. 연소실 각 부에서의 압력 손실을 측정할 수 있었으며, 상당량의 압력 손실이 유속이 강한 연소실 노즐목부에서 발생함을 확인하였다. 주어진 연료 수류시험 조건에서 수력학 해석을 통하여 수력학 해석 방법의 정확도를 검증할 수 있었다.