• 설비공학논문집
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• 제24권8호
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• pp.636-645
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• 2012

The performance of various type plate exchangers with different chevron angle, dimple size and arrangement was analysed by using Ansys v13.0. Heat transfer performance, pressure drop and flow patten of plate heat exchanger were investigated according to mass flow ratio investigated and compared. As a result, the $60^{\circ}$-chevron type plate heat exchanger showed the highest heat transfer performance but pressure drop was relatively high. The efficiency of $45^{\circ}$-chevron type plate heat exchanger showed the best performance in considering of heat transfer performance and pressure drop simultaneously. Among dimple type plate heat exchangers, the highest heat transfer performance was shown in a dim_zigzag type plate heat exchanger but pressure drop was very high. Besides, the dim_upsize plate heat exchanger showed very low pressure drop.

• 대한중풍순환신경학회지
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• 제9권1호
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• pp.14-18
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• 2008

Objectives : This study was done to investigate the relationship of differentiation of the patten identification in stroke patients between acute and convalescent stage. Methods : In the time of period Apr. 1st 2007 to Sep. 29th 2008, 903 patients with stroke admitted in the department of Internal Medicine of Kyungwon University Oriental Medical Hospital, Kyunghee University Oriental Medical Hospital, Dongguk University Oriental Medical Hospital were included. Patients were hospitalized within a month after the onset of stroke. Stroke patients were interviewed by doctors who studied standard operation procedures. A questionnaire was completed by a question-and-answer form between patients and doctors after explanation details to patients and the agreement of patients. Results : The frequency of fire-heat patten was the highest in acute stage of stroke and the one of deficiency of Yin group was the highest in convalescent stage of stroke. This result doesn't have statistical significance. (p<0.05) Conclusions : In this study, we found the relationship of differentiation of the patten identification in stroke patients between acute and convalescent stage. Further, we have concluded that this difference should be considered in the management for stroke patients.

• Journal of the Korean Data and Information Science Society
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• 제24권3호
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• pp.515-521
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• 2013

건강 관리에 있어서 서양의학과 한의학의 접근 방법의 차이는 자연과 인간의 이해에 대한 문화적인 차이에서 비롯된다. 서양의학에서는 자연과 인간을 분리하고 인간 또한 여러 하위 시스템으로 나누고, 질병을 외부의 자극에 대한 반응이 적절하지 못하여 초래되는 것으로 보고 질병이 발생되면 시스템 별로 진단하여 치료해 왔다. 반면, 한의학의 경우 자연과 인간을 하나로 보고 인간의 건강을 자연과의 조화로운 상태로 규명하고 질병이 발생하기 전에 건강의 균형을 유지하기 위한 면역 기능을 높이는 예방적 치료를 주로 해왔다. 이러한 인간에 대한 근본적인 접근방법의 차이는 의료 전달체계를 양분화 시키고 상호 의사소통의 어려움을 야기했으나 통합 의료 서비스는 두 가지 의학의 장점을 살리고 최상의 치료 효과를 지향하는 시도라고 할 수 있다. 따라서 본 논문에서는 특정 질환인 황달에 대해 한의학적 분류 (습증, 열증)에 따른 서양의학에서 사용하는 혈액학적 검사수치를 통계적 분석기법을 사용하여 살펴보고 차이가 있는 수치를 살펴봄으로써 통합의료적 환자 진단과 치료에 적용할 수 있는 접근 방법을 살펴보고자 한다.

• 사상체질의학회지
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• 제21권1호
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• pp.85-98
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• 2009

1. Objective The object of this study was to understand the clinical characteristics of the Taeeumin Symptomatic Pattem. 2. Methods The patients visiting the department of Sasang Constitution of Traditional Korean Medicine clinic from June to November of 2008 were used in this study. Those who showed a favorable turn after over ten days of medication and who showed up for at least two follow-up sessions were chosen among first-time visitors. Of these, 75 patients identified and verified to be of the TE type were chosen for the study sample. The Taeeumin were verified into two groups according to clinical symptoms into Exterior Cold Disease and Interior Heat Disease groups, of which the Interior Heat Disease group was further subdivided into the Galgeun-medicament group and the Cheongshimyeonja-tang group, based on questionnaire results. The Exterior Cold Disease group was set as the control group in order to contrast and compare it with the study group, the Interior Heat Disease group. 3. Results and Conclusions The questionnaire items shown to differentiate the Exterior Cold Symptomatic Patterm and the Interior Heat Symptomaic Pattern (indicating Heat-affceted Liver Symptomatic Pattern) were related to "dryness of stool," "dark urine colorm," "dryness of nose," and "dryness of lips." The items shown to differentiate the Galgeun-medicament group and the Cheongshimyeonja-tang group (of the Dry - Heat Symptomatic Pattern) were related to "nausea," "stifling sensations and palptation," "disturbed sleep," and "dizziness." Therefore, the sleep pattern, palpitation, dizziness, and nausea can be said to be indicators of the Interior Heat Symptomatic Pattern, and Dry-Heat symptoms are better distinctions between the Chongshimyeonja-tang group and the Galgeun-medicament group than Heat-affected Liver symptoms.

• 한국신뢰성학회지:신뢰성응용연구
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• 제16권4호
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• pp.331-337
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• 2016

Purpose: The purpose of this study is the analysis of the failure mechanisms effect of circuit design characteristics of the ballast for LED Lamp Methods: Recently, electronic circuit of ballasts for LED lamp are being occurred on various failure mechanisms (whiskers, ion migration, heat dissipation problem, switching element damage) because electronic ballast circuit design characteristics are becoming more and more diverse. Results: we analysis failure mechanisms that occurs in accordance with the circuit design characteristics The ballast for LED lamp were divided into three different types (Type A, Type B, Type C) considering circuit design characteristics (thermal design, PCB patten spacing, element material) and it was experimented in the acceleration test conditions ($85^{\circ}C$, 85% R.H). Conclusion: We confirmed that failure mechanism of the ballast for LED Lamp had occurred differently in accordance with the circuit design characteristics.

• 한국식품영양학회지
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• 제28권1호
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• pp.126-133
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• 2015

Ohmic heating uses electric resistance heat which occurs equally and rapidly inside food when the electrical current is transmitted into. Prior to the study, we have researched the potato starch's thermal property changes during ohmic heating. Comparing with conventional heating, the gelatinization temperature and the range of potato starch treated by ohmic heating are increased and narrowed respectively. This result is appeared equally at wheat, corn and sweet potato starch. At this study, we treated potato, wheat, corn and sweet potato starch by ohmic/conventional method and observed change of external structure by microscope and internal structure by X-ray diffractometer. Conventional heated at $55^{\circ}C$ potato starch was not external structural changes. But ohmic heated potato starch is showed largely change. Some small size starch particle were broken or small particles are made of larger particle together or small particles caught up in the large particle. Changes in ohmic heated potato starch at $60^{\circ}C$ was greater. The inner matter came to an external particle burst inside and only the husk has been observed. The same change was observed in the rest of the starch. The change of internal structure of potato starch was measured using X-ray diffraction patterns. There was no significant difference between ohmic and conventional heating at $55^{\circ}C$. But almost every peak has disappeared ohmic at $60^{\circ}C$. Especially $5.4^{\circ}$ peak to represent the type B was completely gone. When viewed from the above results, external changes with change in the internal crystal structure of the starch particles were largely unknown to appear. In conclusion, during ohmic heating changes of starch due to the electric field with a change in temperature by the heating was found to have progressed at the same time.

• 동의생리병리학회지
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• 제25권2호
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• pp.318-321
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• 2011

In this study, when a physician make a diagnosis of the Pattern Identifications(PIs) of stroke patients, the development methods of the PIs classification function is considered by diagnostic questionnaire of the PIs for stroke patients. Clinical data collected from 1,502 stroke patients who was identically diagnosed for the PIs subtypes diagnosed by two clinical experts with more than 3 years experiences in 13 oriental medical hospitals. In order to develop the classification function into PIs using the 44 items-Fire&heat(19), Qi-deficiency(11), Yin-deficiency(7), Dampness phlegm(7)- of them was significant statistically by univariate analysis in 61 questionnaires totally, we make some comparisons of the results of discriminant analysis model and generalized logit model. The overall diagnostic accuracy rate of the PIs subtypes for discriminant model(74.37%) was higher than 3% of generalized logit model(70.09%).