• 대한예방한의학회지
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• 제14권3호
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• pp.117-127
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• 2010

Objectives : The purpose of this study was to find out the characteristics of patients who admitted due to industrial accident and to promote the superiority of oriental medical treatment on the sequelae of industrial accident. Methods : We analyzed the medical charts of 51 inpatients in a local oriental medicine hospital. The patients had been hospitalized from May 1, 2003 to October 31, 2010. Results : 1. By gender, males accounted for 78.4%, while females 21.6%. By age, most incidences occurred in the forties(29.4%), fifties(23.5%) and thirties(19.6%) in order. 2. Most causes of accident was carelessness(27.5%) and fall down(21.6%) was the next. 3. With regard to the interval from occurrence of accidents to hospitalization, 20 cases(39.2%) were found to be hospitalized 31～90 days after the accidents, followed by 11 cases(21.6%) in 91～180 days and 7 cases(13.7%) in 181～360 days. 4. Most cases turned out to be injuries with 40 patients from Sequelae of intracerebral hemorrhage (23.5%) and Lumbar and other intervertebral disc disorders with radiculopathy(13.7%). The mean duration of hospitalization was $209.03{\pm}346.04$ days. Inpatients of Organic brain syndrome NOS numbered the longest stay($676{\pm}86.26$days), Sequelae of intracerebral hemorrhage recorded $541.91{\pm}541.83$ days hospitalized. 5. Most of inpatients were treated with acupuncture(100%), herbal medication(98.0%), oriental physiological therapy(82.3%), and moxibustion(76.4%). Conclusions : This article will help the researchers related to Oriental medicine establish basic source of Oriental medicine approach for inpatients due to industrial accident.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1996년도 하계학술대회 논문집 A
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• pp.101-103
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• 1996

Multiply-twist cable is used for a large capacity superconducting cable because it is helpful to reduce AC losses and to increase transport current. In a multiply-twisted cable, the axis of a strand does not coincide with that of cable. Therefore, the longitudinal field is generated by the transport current. The longitudinal field changes the current distribution in the strand and generates additional AC loss. This paper calculates the longitudinal field that is applied to a strand in the multiply-twisted cable. Current distribution of a strand in the cable is also presented. 2nd level superconducting cable is chosen as an analysis model, whose current capacity is 2000A. Calculation result shows the longitudinal field cannot be neglected in low field machines such as superconducting transformer.

• Preventive Nutrition and Food Science
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• 제16권2호
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• pp.179-183
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• 2011

This study was conducted to determine the biological activities of 70% ethanol extracts from rice husks of nine rice cultivars in Korea. The relative antioxidant activities of rice husk extracts were evaluated by determining DPPH, ABTS radical scavenging activity and reducing power. The contents of total polyphenol, flavonoid and r-oryzanol were measured by spectrophotometric methods. Among the extracts of rice husks, Nokmi rice husks tended to have the most effective antioxidant activities compared to other rice husk varieties. Seolgaeng rice husk extract showed anti-proliferative activity against cancer cell lines (MCF7 and NCI-H460), and Hongjinju rice husk extract significantly exhibited mitogenic activity.

• 환경위생공학
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• 제18권3호통권49호
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• pp.48-58
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• 2003

To obtain the preliminary design data for combustion of paper sludges, decomposition characteristics and combustion kinetics of paper sludges reactor have been determined in a TGA reactor. Also, the combustion characteristics of paper sludges have been determined in a fluidized bed reactor. The data obtained from the TGA reactor indicate that dewatering of paper sludge is terminated at temperature below 130${\circ}$C. With heating rate of 20${\circ}$C/min, combustion is terminated at temperature below 340${\circ}$C .The combustion rate is found to be first order with respect to temperature and oxygen concentration. Activation energies for paper wastes are found to be 570, 700, 2600, 4600 Kcal/mole, respectively. The calcination conversions were investigated with the operating temperature and residence time. In this investigation, it was found that calcination conversion was affected by the operating temperature and residence time. The optimum conditions of operating temperature and mean residence time were 850${\circ}$C and 6 minutes of respectively.

• 한국주조공학회지
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• 제18권6호
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• pp.563-569
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• 1998

A Study on microstructure and elevated temperature strength of 18Cr-2Mo ferritic stainless steel castings strengthened by alloying small amounts of titanium and carbon, has been conducted. The morphology of titanium carbides showed spherical in shape and their distribution depended on the amount of alloying elements. Maximum density ($7{\times}10^5/cm^2$) of titanium carbides has been formed in the alloy containing 2.0 wt.% titanium and 0.5 wt.% carbon as alloying elements and the size of carbide particles is in the range of 0.5 to $3.0\;{\mu}m$. High temperature tensile and fatigue strength of this alloy were the highest among the alloys tested in this research. The fracture mode of the alloys containing alloying elements less that 2.0 wt.% titanium and 0.5 wt.% carbon showed intercrystalline fracture at room temperature, while the alloys containing higher amounts of alloying elements showed transcrystalline fracture. All of the alloys showed creep or ductile rupture mode at elevated temperature.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2007년도 7th International Meeting on Information Display 제7권2호
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• pp.1284-1287
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• 2007

Titanium dioxide ($TiO_2$) is promising candidate for fabricating blocking layer of gate dielectrics in non-volatile memory (NVM). In this work, we investigated $TiO_2$ as high dielectric constant material instead of silicon dioxide ($SiO_2$), which is generally used as blocking layer for NVM.

• 설비공학논문집
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• 제22권6호
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• pp.413-418
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• 2010

The amount of heat loss of a refrigerator through the gasket is nearly 30% of total refrigerator heat loss. In this paper, quantitative evaluation for the effects of various effort to reduce heat losses through the gasket. The first trial is to extend the inner gasket to prevent the heat loss flowing from the inner of refrigerator. The effects of thermal conductivity changes of gasket and magnet are investigated by the numerical heat transfer analysis. The position change of hot line is also examined in the present research. From the present result of the numerical simulation of heat transfer, we are able to reduce the heat loss about 20~40% by using inner gasket extension. The reducing of thermal conductivity of gasket is considerable in the heat loss reduction. On the other hand, the thermal conductivity change of magnet has no apparent effect in heat loss reduction. The position change of hot line has considerable positive effect in the reduction of heat loss near gasket region.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2009년도 춘계학술대회 논문집 전기설비전문위원
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• pp.67-69
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• 2009

수십년 간 주요 운송 수단의 한가지로 사용되고 있는 도시철도는, 사고 발생 시 큰 경제적 손실과 사회적 손실을 야기할 수 있으나, 사고의 주 원인 중 한가지인 도시철도 전력설비 고장에 대한 감시 및 진단 시스템은 적용되고 있지 않은 실정이다. 최근 이러한 전력설비 상태 감시 및 진단에 대한 필요성이 점차 커지게 되어, 도시철도 전력설비 수명예측 시스템 설계에 관한 연구 과제가 제안되어 현재 국토해양부와 건설기술평가원, 그리고 한국철도기술연구원의 주도 하에 수행되고 있다. 본문에서는 수명예측 시스템 설계에 필요한 도시철도 전력 시스템의 특성과 고장 사례를 조사하였으며, 각 도시철도 운영기관의 사용자 요구사항 설문 결과, 그리고 수명예측 시스템의 일부인 전력설비 감시진단 시스템 기초 설계 결과를 나타내었다.

• 보건의료산업학회지
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• 제4권2호
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• pp.23-31
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• 2010

This study analyzed whether the patients' visits to oriental medicine hospitals were influenced by the Euclidean distance from patients' residence to oriental medicine hospitals. Patient who visited two oriental medicine hospitals in a metropolitan area were selected for study sample. The number of patient from each Dong (which is the smallest administrative district) to two hospitals was calculated based on claims data in 2008. ArcGIS was used to calculate the distance. Distance variable was not statistically significant in regression analysis after controlling the difference of socio-economic status of people in each Dong. It seems that distance factor did not play an important role in deciding whether to use the services of oriental medicine hospitals in a metropolitan area.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2008년도 추계학술대회A
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• pp.534-537
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• 2008

In recent years, the dissimilar metal, Alloy 82/182 welds used to connect stainless steel piping and low alloy steel or carbon steel components in nuclear reactor piping system have experienced cracking due to primary water stress corrosion(PWSCC). It is well known that one reason of the cracking is the residual stress by the weld. But, it is difficult to estimate exactly weld residual stress due to many parameters of welding. In this paper, the analysis of 3 FEM models made by ABAQUS Code is performed to estimate exactly the weld residual stress on the dissimilar metal weld. 3 FEM models are Butt model, Repair model and Overlay model and are the plane.strain 2D model. The thermal analysis and the stress analysis are performed on each model and the residual stresses on each model were calculated and compared respectively. Also, the specimen of Butt model was made and the residual stresses were measured by X-Ray method and Hole Drilling Technique. These results were compared with the FEM result of Butt model.