• 대한기계학회논문집A
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• 제21권2호
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• pp.305-316
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• 1997

A more efficient method for obtaining the fatigue life enhancement of a structure member with fastener holes is described. It is based on the combined process of cold-expansion and ring-indentation. Residual stresses were induced onto premachined holes using ring-indentation process near the fastener hole combined with cold-expansion. And residual stresses at the vicinity of a hole were evaluated using a fracture mechanics approach. The compressive residual stresses were larger using the combined process than is in the case of simple cold-expansion. Fatigue testing of aluminum specimens showed that the fatigue crack growth retardation emanating from a circular hole was greater for the combined process than for a simple cold-expansion alone.

• 한국식품영양학회지
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• 제9권4호
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• pp.478-483
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• 1996

풋감을 30일간 저온저장(7$^{\circ}C$) 및 냉동저장(-2$0^{\circ}C$) 하면서 성분의 변화를 조사하였다. 수분, 단백질, 지질, 탄수화물 등의 일반성분은 저장방법이나 저장기간에 따른 변화가 없었으며, 조섬유 함량은 냉동저장 시는 거의 변화가 없었으나 냉장저장 시는 저장기간이 길어짐에 다라 약간씩 감소하였다. 폴리페놀 함량은 냉장, 냉동저장에서 모두 증가하였으나 냉동저장의 경우 증가폭이 매우 컸다. 총 펙틴 함량은 저장기간이 연장에 따라 감소하였고 수용성 펙틴 함량은 증가하였는데 냉동저장인 경우는 그 증가나 감소 정도가 매우 적었다. 탄닌 함량은 냉동저장 시는 거의 변하지 않았으나 냉장 저장한 경우는 크게 감소하였다.

• 대한한방체열의학회지
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• 제9권1호
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• pp.8-21
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• 2011

Purpose : This study is to investigate the trends of study of cold hypersensitivity in Korean traditional medicine and to direct for future research. Methods : We searched for papers which had used cold hypersensitivity in korean journals. Results : 25 papers were found. 10 papers were associated with characteristics of cold hypersensitivity. 8 papers were associated with case study. 5 papers were associated with diagnosis. 2 papers were associated with research for treatment effect. Conclusion : Studies have been conducted on cold hypersensitivity in various fields. But evidence is not enough, so more research will be needed.

• 대한한방체열의학회지
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• 제9권1호
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• pp.44-50
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• 2011

Purpose : The purpose of this study is to investigate effect of Hyangsayijoongtang-gamibang on Cold Hypersensitivity and accompanying perspiration. Methods : Hyangsayijoongtang-gamibang was used for a Cold Hypersensitivity patient with accompanying perspiration that was admitted to Kangnam Kyung-Hee Korean Hospital from May 2nd, 2011 to May 14th, 2011. The efficacy of the treatment was evaluated with Digital Infrared Thermal Imaging(DITI). along with objective and subjective observations. Results : After treatments of oriental medicine. the mean body temperature elevated $1.32^{\circ}C$. and the mean temperature difference between different points of the body decreased more than 50%. Subjective observation of Cold Hypersensitivity and accompanying perspiration using Visual Analog Scale(VAS) also showed improvement. Conclusion : Results suggest that Hyangsayijoongtang-gamibang is effective in treating Cold Hypersensitivity patients with accompanying perspiration.

• Korean Chemical Engineering Research
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• 제59권3호
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• pp.345-358
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• 2021

본 연구에서는 액화천연가스(LNG; liquefied natural gas) 재기화 과정에서 버려지는 냉열을 회수하는 방법으로 액화 공기를 생산하는 공정을 개발하였다. 액화 공기는 LNG 수출국으로 운송하여 천연가스 액화를 위한 냉매를 부분적으로 대체하는 용도로 활용될 수 있다. 이를 위하여, 액화 공기는 LNG 운반선에 저장 가능한 압력을 만족하여야 한다. 따라서, 가장 널리 사용되는 멤브레인 탱크로 액화 공기를 운송하기 위해 약 1.3 bar에서 공기가 액체 상태로 존재할 수 있도록 설계하였다. 제안한 공정에서, 공기는 LNG와의 열교환 이후 추가적인 질소 냉매 사이클과의 열교환을 통해 과냉된다. LNG 운반선의 최대 용량만큼 액화 공기를 생산할 때 운송비용 측면에서 가장 경제적일 수 있으며, 천연가스 액화공정에서 활용할 수 있는 냉열이 많아지게 된다. 이를 비교하기 위하여, 동일한 1 kg/s의 LNG 공급 조건 하에서 기존 공정을 이용한 Base case와 제안공정 내 유입 공기 유량을 각각 0.50 kg/s, 0.75 kg/s, 1.00 kg/s으로 하는 Case1, Case2, Case3를 구성하고 열역학적 및 경제적 측면에서 분석하였다. 액화 공기 생산량이 많을수록 1kg의 생산량 당 더 많은 에너지가 요구되는 경향을 보였으며 Case3는 Base case 대비 0.18 kWh 높게 나타났다. 그 결과 Case3의 액화 공기 1 kg 당 생산 비용이 $0.0172 더 높게 나타났다. 그러나 액화 공기의 생산량이 증가함에 따라 1 kg 당 운송 비용이 $0.0395 감소하여 전체 비용 측면에서 Case3는 Base case에 비해 1 kg 당 $0.0223 적은 비용으로 액화 공기를 생산 및 운송할 수 있음을 확인하였다.

• 대한본초학회지
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• 제31권3호
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• pp.37-41
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• 2016

Objectives : The purpose of this study is to assume the size of sliced piece, daily dose and extracting Method of Rhubarb in Treatise on Cold Damage Diseases.Methods : I contrast results of recent studies with assuming results based on original text of Treatise on Cold Damage Diseases.Results : Daily dose was 6, 4 or 2 Ryang in case of cutting Rhubarb in bean-size. These prescriptions were decocted with water or sinked in boiled water. Another daily doses were large baduk-piece size 6 units and baduk-piece size 6 units in case of cutting Rhubarb in size bigger than bean. The former was used in adding to the Jisilchijasi-tang in case of constipation, the latter was used in Sihogayonggolmoryeo-tang and Jeodang-tang. The size of large baduk-piece was 2.32 cm in width, 4.64 cm in length, 4.3 g in weight, and the length and weight of baduk-piece was half of that was. Two sizes of Rhubarbs were sunk in water for 12 hours. After decocting the other ingredients, mixed Rhubarb extraction and Rhubarb, and then boiled it for 1 minute.Conclusions : From this study, daily dose of Rhubarb was 6, 4 or 2 Ryang and the 6 pieces of large baduk-piece or baduk-piece are respectively 4 or 2 Ryang. The extracting methods was decocting, sinking in boiled water for short time, sinking in water for long time and then mixing these with other decocted solution.

• 대한기계학회논문집B
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• 제27권1호
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• pp.117-124
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• 2003

Thermal design fur satellite propulsion system has been performed. Overall design requirements and the constitution for propulsion system is described. To meet the thermal design requirements, both a primary and a redundant heater circuit, each with two thermostats placed in series, will protect each hydrazine-wetted components, even if one heater circuit fails to operate. Heater power is turned off if any one of these thermostats is opened at its higher setpoint. Thus, even if one thermostat is failed closed, the second thermostat will turn off the heater. All such components shall be insulated with MLI. Propulsion heater sizing based on the constant worst cold case condition is conducted through thermal analysis. All heaters selected fur propulsion components operate to prevent propellant freezing satisfying the thermal requirements for the propulsion subsystem over the worst case average voltage, i.e. 25 volts.

• 대한한방내과학회지
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• 제30권3호
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• pp.648-655
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• 2009

Peripheral neuropathy is a disease of multiple Peripheral nerves. Tingling, pins-and needles, numbness, burning and raw sensation are symptoms of peripheral neuropathy. These symptoms are frequently complained by patients who suffered from obstructive syndrome of Ki and blood (痺證). This case was reported to evaluate the effects of oriental medicine therapy on a patient with obstructive syndrome of Ki and blood (痺證). The subject was a female patient who had obstructive syndrome of Ki and blood (痺證). She complained of calf pain, cold sense, walking discomfort, insomnia, dyspepsia, anorexia etc. We administered the medicine with dispeling the cold pathogenic factor (寒邪), adjusting the constructive and defensive energy (調營衛), tonifying the Ki and blood (補氣血) by stage. After the treatment, the symptoms improved. This case suggests that oriental medicine therapy can be applicable to improve in symptoms with Peripheral neuropathy.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2001년도 추계학술대회논문집B
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• pp.77-82
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• 2001

Thermal design for KOMPSAT-2 propulsion system has been performed. Overall design requirements and the constitution for propulsion system is described. To meet the thermal design requirements, both a primary and a redundant heater circuit, each with two thermostats placed in series, will protect each hydrazine-wetted components, even if one heater circuit fails to operate. Heater power is turned off if any one of these thermostats is opened at its higher setpoint. Thus, even if one thermostat is failed closed, the second thermostat will turn off the heater. All such components shall be insulated with MLI. Propulsion heater sizing based on the constant worst cold case condition is conducted through thermal analysis. All heaters selected for propulsion components operate to prevent propellant freezing satisfying the thermal requirements for the propulsion subsystem over the worst case average voltage, i.e. 25 volts.

• 대한본초학회지
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• 제37권6호
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• pp.53-59
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• 2022

Objectives : Cleanser is the most basic tools used in daily skin care. I made a cold process soap using Castanea crenata inner shell (CCIS). I'd like to study the effect of face wash using CCIS cold process (CP) soap on the skin. Methods : The same water and towel were used at the same place in order to examine the skin change state immediately before and after washing face. The skin test was performed before and after 10 minutes washing the face in order to remove these external environmental factors, such as lifestyle, alcohol, tobacco, and stress etc. As a control group, the cases of washing with water and foam cleanser (F/C), which is a popular commercial product, were set. Three cases were compared and analyzed. Results : In the case of water washing, there was a significant decrease in oil (U-zone) but that was not good effect. In the case of F/C and CCIS washing, there were significant decrease in oil (T-zone), pores and pigmentation, but the significance was bigger in CCIS washing. In the case of pores, there was a significant decrease in all three cases. Conclusion : In the case of F/C and CCIS washing, it showed the effect of reducing T-zone oil, pores and pigmentation. But the significance was greater in CCIS case than in F/C case. CCIS cp soap is considered as a form of face wash that is suitable for skin care.