Development of High efficiency Food Waste Treatment System for Entering New and Renewable Energy Industry in Southeast Asia

Kwon,Ki-Tae,Lee,Woo-Sik,Kwon,Lee-Seung,Seong,Seung-Hwan,Kim,Young-Do,Kwon,Woo-Taeg 한국유통과학회 2019 KODISA ICBE (International Conference on Business Vol.2019 No.-

It is possible not only to treat high concentration organic matter such as food wastes but also to utilize food wastes as resources according to the bio-energy generation such as methane. The method of co-digestion of mixed wastewater mixed with organic wastes such as sewage sludge concentrated waters together with drinking wastewater is the most ideal method. Radiation not only has germicidal power in water treatment, but also is effective in decomposing degradable organic matter. Second chemical contamination problem is also solved because it does not use chemicals. Introduction of radiation pretreatment system to solve problems caused by mixing of waste water and organic waste resources. Biological electrochemical fusion system is used to remove the nutrients contained in the organic matter-removed mixture. Through the development of a system for treatment of high concentration wastewater, the processing efficiency is verified through the universal water treatment system for wastewater containing high concentration organic matter in addition to treatment of wastewater.

브레이징법에 의한 TiA1 금속간 화합물의 접합에 관한 연구

권영순,권용재,김지순,김환태 울산대학교 1995 공학연구논문집 Vol.26 No.2

본 연구에서는 Al을 삽입금속으로 사용하여 브레이징법으로 접합한 TiAl 금속간화�물의 접합특성에 대하여 조사하였다. 삽입금속인 Al과 모재인 TiAl과의 반응에 의해 접합계면에서는 반응생성층으로서 경도가 모재보다 높고 취약한 TiAl₃가 형성되었으며, 접합온도가 600℃로 낮았거나 가열속도가 30K/min으로 너무 빠를 경우에는 반응생성층내에 void와 미소균열과 같은 접합결함이 존재하였다. 이와 같은 접합결함들은 700℃보다 높은 온도에서 접합하거나 가열속도를 10K/min보다 낮게 하여 접합한 경우에는 나타나지 않았다. 한편 접합체의 기계적 성질의 향상을 위하여 접합 후 Ar가스 분위기에서 열처리를 행한결과, 1300℃에서 3시간 동안 열처리를 했을 경우 모재와의 조성의 균일화가 완전히 이루어지지 않았으며 또한 반응생성층의 형태도 변화가 없었다. 그러나 1350℃에서 3시간 동안 열처리한 결과 조성의 균일화와 함께 반응생성층은 ??단상으로 변하였으며, 반응생성층의 미소경도는 층상조직인 모재의 미소경도보다 조금 낮게 나타났다. In this study, Joining properties of TiAl intermetallic compound bonded by brazing method using an insert metal of Al foil were investigated. A brittle reaction product layer. TiAl₃was formed at the joining interface and its microhardness was very higher than that of base metal. When the specimen was bonded at low temperature of 600℃ or with high heating rate of 30K/min respectively, joining defects like void and micro-crack were formed in the in the inside of reaction layer. These joining defects were disapeared when the speciment had been bonded at higher temperature than 700℃ or with lower heating rate than 10K/min. For the purpose of improving the mechanical properties of joints, effects of the post-bond heat treatment in Ar gas atmosphere on microstructure and hardness distribution of the bonded speciment were studied. When the joint was geat-treated at 1300℃ for 3 hr, homogenization of the compositions in the joining interface region was not achieved completely and morpholgy of the reaction product layer was still remained without morphological change. However, when the joint was heat-treated at 1350℃ for 3 hr, homogenization of the compositions in the joining interface region was achieved and the reaction product layer changed to γ single phase. And micro-vickers hardness of reaction layer region was slightly lower than that of base metal.

신사회운동과 政治 : 政治勢力化의 요인과 쟁점 Factors and Issues for Politicking

권태환,송호근 서울대학교 사회과학연구원 2000 한국사회과학 Vol.22 No.1

이 연구의 결론에 해당하는 이 논문은 사회운동의 정치세력화의 다양한 양상을 비교론적 관점에서 권역별로 분석한 앞의 논문들의 연구결과를 종합하여 정치세력화의 개입하는 구조적 요인들을 체계화하는 데에 목적을 둔다.앞의 연구들은 '정치세력화'를 신사회 운동의 정당정치화에 국한하기보다는 어떤 결집된 형태가 아니더라도 정부와 정치권의 중대한 정책결정에 무시할 수 없는 압력을 가할 수 있는 운동형태로 규정하여 상당히 폭 넓은 입장을 취한다.'정치세력화를 향한 길'을 일차적 과정과 이차적 과정으로 구분하고, 이차적 과정을 정치세력화의 중대한 계기로 보았다.이 논문은 이차적 과정을 관할하는 가장 중요한 요인으로 '정치적' 기회구조를 지목하고, 정치적 기회구조를 지배집단의 구조와 이념적 관용의 수준, 국가의 구조, 정당구조로 세분하여 각각의 구체적 양상을 검토하였다.이러한 관점에서 본다면, 한국의 사회운동은 다른 국가들에 비하여 정치세력화의 조건이 비교적 양호하고 조직적 기반도 그런대로 괜찮은 편이다.그러나, 여전히 낙관적인 전망을 허용하는 것은 아니다. As a conclusion of this research, this paper aims at summarizing and systemizing the result of these papers published in this volume that are a comparative analysis of various aspects of politicking of civil social movements (CSMs) in East Asia, Latin America, and South Korea. This research stands upon a broad concept of the politicking of CSMs that includes dispersed claims of civilians without a visible organization that can affect governmental and political decision making. This paper divides the road to power into two consecutive stages, i.e., the first and second stages. The second stage is more decisive on the politicking than the first stage. The success and failure of the second stage relies upon the 'political opportunity structure' that consists of three important factors: the degree of ideological toleration and the structure of the ruling class, the structure of state and political party. From this standpoint, Korea's CSMS are comparatively in favorable conditions for politicking than Latin America and East Asia. But it does not still allow optimistic prediction.

단백뇨를 보이는 사구체 질환 및 당뇨병성 신병증에서의 Lp(a)

권태환,김준홍,조성,김석재,김용림,조동규,백미영 경북대학교 병원 1998 경북대학교병원의학연구소논문집 Vol.2 No.1

Background: Recently there has been evidences that serum Lp(a), an independent risk factor to atherosclerotic cardiovascular diseases, were increased in proteinuric disorders such as nephrotic syndrome and diabetic nephropathy. Methods: We intended to search of altered concentrations of Lp(a) in proteinuric disorder measuring serum Lp(a) concentrations with ELISA in 44 glomerulonephritic patients(25 nephrotic syndrome(NS), 19 non-nephrotic range proteinuric glomerulonephritis(GN), 25 diabetic nephropathy patients(DN), and 31 healthy controls(HC). Also, we compared Lp(a) concentration between glomerulonephritis patients and diabetic nephropathy patients with proteinuria of similar degree. Results: 1) There were significantly increased levels of total choesterol, triglyceride, and LDL-cholesterol in Ns compared to GN, DN, HC. 2) There were significantly increased concentrations of serum Lp(a) in NS compared to HC, but no signiicant difference in serum Lp(a) among NS, GN, and DN. 3) There was no significant difference in serum Lp(a) concentrations between NS & DN with 24 hour urine protein greater than 3.0g. 4) There was no significant difference in serum Lp(a) concentration between GN with 24 hour urine protein greater than 0.5g and less than 1.5g and DN with proteinuria of simial degree. 5) In glomerulonephritis patients, there was negative correlation between serum Lp(a) concentration and serum albumin level but correlation with 24 hour urinary protein, total cholesterol, Ldl-cholesterol, and HDL-cholesterol was not shown. In diabetic nephropathy, there was no significant correlation among serum Lp(a) concentration and all parameters including serum albumin, 24 hour urinary protein, and other lipid profiles. Conclusion: The present study confirmed that patients with nephrotic syndrome of diverse etiologies have makedly increased plasma level of Lp(a), in conjunction with other lipid abnormalities. However, this study shows no difference in Lp(a) concentrations between diabetic nephropathy and glomerulonephritis with similar degree of proteinuria.

분말사출성형을 통해 제조된 17-4 PH STS의 인장특성에 미치는 초기 충진율과 열린 기공의 영향

하태권,성환진 국립7개대학공동논문집간행위원회 2005 공업기술연구 Vol.5 No.-

Powder injection molding (PIM) makes use of the shaping advantage of injection molding and is applicable to metals and ceramics. PIM delivers structural materials in a shaping technology, previously restricted to polymers. In this study, the 17-4 PH stainless steel powders with average diameters of 6-14 μm were injection-molded into flat tensile specimens. Sintering of the compacts was carried out at the various temperatures ranging from 1350oC for Ih. In the case of the compacts made with 10-μm powder, sintering temperature was taken from 200-1350oC to investigate the effect of relative density on the tensile properties.

액체크로마토그래피/질량분석법을 이용한 랫트 혈장내의 Surfactin C의 정량법에 관한 연구

임종환,김명석,이동연,이상훈,백경진,김태원,정두순,박병권,윤효인 충남대학교 수의과대학 동물의과학연구소 2004 動物醫科學硏究誌 Vol.12 No.-

Surfactin isolated from Bacillus subtilis has a strong surface tension-lowering activity, together with antiviral, antitumor, fibrinolytic and hypocholesterolemic activities. LC/MS is a simple, rapid and effective technique for the determination of surfactin C in rat serum. The separation of surfactin was achieved on reverse phase column. The mobile phase consisted of 0.1% trifluoracetic acid in water (A) and acetonitrile (B). As a result of analysis of blank rat serum samples, matrix interference was not shown. The values of precision and accuracy were satisfied w the guideline. A newly developed LC/MS method for the determination of surfactin C was successfully applied in its pharmacokinetic analysis.

천이액상접합시 액상기지내의 고상입자의 거동

김환태,권영순,문진수 울산대학교 1997 공학연구논문집 Vol.28 No.2

본 연구에서는 Mo와 Fe 모재에 대해 액상소결한 삽입금속을 사용한 천이액상접합에서의 등온응고과정과 등온응고시에 일어나는 액상기지내의 고상입자의 거동에 대해 조사하였다. Mo/Mo-Ni/Mo계의 접합에서 삽입금속중의 Ni의 확산에 의해 모재에서는 재결정이 일어남과 함께 zigzag 형태의 복잡한 입계를 형성하였다. Fe/Fe-B/Fe계의 접합에서 등온응고과정은 액상기지내의 고상입자의 성장과 함께 모재와 삽입금속 계면에서의 계면의 성장에 의해 지배되었으나, Fe/Fe-P/Fe계의 접합에서는 모재와 삽입금속 계면에서 계면의 우선적인 성장에 의해 지배되었다. This study evaluated behavior of solid particles at the bonded interlayer of joints and homogenization process during TLP bonding of Mo and pure Fe with a liquid phase sintered insert metal. From the experimental results, isothermal solidification process was different from that of traditional TLP bonding. Recrystallization in the Mo base metal due to diffusion of Ni and zigzag migration of solid particle's grain boundary according to strain energy were observed at the Mo/Mo-Ni/Mo joint. In TLP bonding of Fe/Fe-B/Fe system, isothermal solidification process was controlled by growth of solid particles and migration of solid-liquid interface at the bonded interlayer of joint. But in TLP bonding of Fe/Fe-P/Fe system, isothermal solidification process was controlled only by migration of solid-liquid interface at the bonded interlayer of joint.

소아 확장성 심근증의 임상적 고찰

이성환,김준식,박근수,김명성,권태찬,김천수,이상락 啓明大學校 醫科大學 1996 계명의대학술지 Vol.15 No.1

A Clinical assessment of the 25 patients with dilated cardiomyopathy who were admitted to the Department of Pediatrics, Keimyung University Dong San Hospital from January, 1982 to June, 1993 was performed. The result were as follows: 1) Among 25 patients with dilated cardiomyopathy. 8(32%) were younger than 1 year of age at the time of admission. 2) Adriamycin toxicity was the only encountered etiologic factor in 1 patient. 3) On admission, hepatomegaly and tachycardia were noted in almost all patients. 4) The Chest X-rays showed cardiomegalies in all 25 patients, pulmonary vein congestions in 15(60%) and pleural effusion in 2(8%). 5) The electrocardiography showed left ventricular hypertrophy in 72% and supraventricular tachycardia in 32%. 6) The echocardiographic examination showed left ventricular dilatations in all patients and left atrial dilatations in 20(80%). 7) Of 18 patients who had followed mean period of 2.9 years, 10 patients died within 9 months after the diagnosis.

都市地域 中年層의 3段階老後生活欲求分析에 關한 硏究

朴泰煥,權寧敏 慶尙大學校生産技術硏究所 1996 生産技術硏究所論文集 Vol.12 No.-

The elderly's satisfaction for the life, in a sample investigation of small city, is affected by these factors, such as health condition, aspects of family inhabited together, economic situation, the degree of education, occupation, religion, participation in social education, social group activities and elderly feeling age. The purpose of this study is to develop living environment after retirement as a base of the elderly for the life through a shelter design, in consideration of their characteristic, physical and psychological continuous care service system. The result of this study can be arranged as followings. In a independent living stage, the elderly can use existing facilities to maintain their own living. In this case, offspring need to live within 20 minutes on foot, or 30 minutes by car. In a semi-dependent living stage, the elderly live with young couple who can take care of them in a same house. And it's desirable that the elderly live in retirement village which has all convenience facilities. In a dependent living stage, the elderly need to stay in nursing homes or day care center. When the elderly need house living service care-service system should be served in the same building. In a dependent living stage, the elderly should stay in a seperated house, which is called flexible-care system.

Ni-Cr계 내열주강의 천이액상접합에 관한 연구

김환태,권영순,문진수 울산대학교 1997 공학연구논문집 Vol.28 No.2

본 연구에서는 MBF-50 삽입금속을 이용한 Ni-Cr주강(HP)의 천이액상접합시의 접합계면의 거동에 대해서 조사하였다. 접합은 진공분위기에서 1100℃∼1200℃의 온도 범위로 0∼60분 동안 행해졌으며 접합압력은 1MPa였다. 본 실험에서 얻어진 결과는 다음과 같다. 1) 1150℃에서 접합한 결과 반응층 내에는 Cr계 탄화물의 생성을 확인할 수 있었다. 2) 유지시간의 증가와 함께 등온응고는 매우 빠르게 일어나 20분 이내에 반응층이 거의 소멸되었으며 성분원소의 균일화도 거의 이루어진 상태였다. 3) 등온응고가 일어나기 이전의 접합부의 경도는 모재에 비해 높게 나타났으나, 유지시간이 증가하면서 균일화와 함께 반응층의 경도는 모재와 같게 나타났다. 4) 접합계면부의 각도를 달리하여 접합한 시편의 creep 특성을 조사한 결과 접합계면각도가 작을수록 creep 특성이 우수하게 나타났다. Transient liquid phase(TLP) bonding of Ni-Cr heat resisted casting alloy(HP) was investigated using of the insert metal MBF-50. TLP-bonding was carried out at 1100℃∼1200℃ for 0∼60min in vacuum atmosphere and bonding pressure was 1MPa. The results of this study are, 1) Microconstituents such as Cr-carbide were formed in the bonded interlayer. 2) Isothermal solidification process was very fast at the bonding temperature of 1150℃ with increasing bonding time, the reaction layer disappeared and homogenization was almost over at the bonding time of 20min. 3) The hardness of reaction layer was higher than that of base metal before isothermal solidification, as time increased the hardness was almost same as that of base metal with homogenization of chemical composition. 4) In case of sample with different bonding interface angle, the smaller bonding interface angle, the better creep property.