부유대역 용융응고법으로 제조된 YBa_2Cu_3O_x 산화물초전도체의 미세구조와 전기적 특성

노태형,송정환,장규철,한이섭,김소정,구본급,김호기 대전산업대학교 반도체기술연구소 2000 半導體技術硏究所報 Vol.2 No.-

The YBa_2Cu_3O_x-20 wt% Y_2BaCuO_5 composition designed in YBCO system was synthesized by solid state reaction method. The optimum condition of hot zone temperature and growth rate in floating-zone melt were 1080 ℃ and 2.5 mm/hour, respectively. In samples growth as these condition, the low angel boundaries in grain direction and small amount of amorphous phase known as decreasing characteristics of superconducting materials between grain boundaries in microstructure are investigated by polarized light microscopy on the whole. The critical current density(Jc) at 77k of sample using powder fabricated with no CeO_2 and doped 5 wt%CeO_2 were 8,000 A/㎠(Jc : 561A) and 12,000 A/㎠(Jc: 826A) at 0 T by direct current transport method, respectively.

소아의 하악 과두 골절의 비외과적 치료 : 증례보고 CASES REPORTS

이정근,박익수,노양호,김동우,김우형,이희철 大韓顎顔面成形再建外科學會 2003 Maxillofacial Plastic Reconstructive Surgery Vol.25 No.1

Of all facial fractures in children, condylar fractures have the greatest propensity to produce a growth disturbance. The pediatric condylar fracture occurs very frequently in the mandible, but this injury is occasionally ignored due to difficulty of diagnosis and no cooperation of patient. The adequate initial diagnosis and active treatment must be performed because delayed and improper treatment lead to possible severe complications such as facial asymmetry, TMJ pain, limiation of motion and deflection, midline deviation of the dental arch. So, the goal of managing condyle fractures in the growing patient is to restore mandibular symmetry, occlusion, function without interfering with future growth. Commonly, fracture teatment aims at restoring function through repositioning and rigid fixation of the bony fragments. However, the generally preferred management of condylar fractures in growing children is nonsurgical. So, we present the clinical and radiographic follow-up results of 4 condylar fractures in pediatric patients whom we managed in conservative and functional method. We can summarize our protocol in management of pediatric condylar fracture as the following: The IMF using acrylic resin splint with circumferential wiring was performed for 1 or 2 weeks. After releasing IMF, the active physical therapy was done with guiding elastic band. Opening deviation was controlled by mannual pressure of surgeon or parents for 2 weeks. When unstable occlusion or functional problem remained, functional appliance after construction bite registration was used for several months.

사회적 구성주의 학습이론에 기초한 예비 교사의 온라인 토론 분석

차정호,노태희 한국컴퓨터교육학회 2005 컴퓨터교육학회 논문지 Vol.8 No.1

포름알데히드 含有 廢水가 嫌氣性 處理에 미치는 影響

박광석,노현웅,박정호,박승조 동아대학교 환경문제연구소 1997 硏究報告 Vol.20 No.1

The effects of formaldehyde in anaerobic digestion were : 1. In the cases of batch assay, the methanogenic bacteria were tolerated the toxic when raw and pretreated wastewaters were injected 3 and 5 ml respectively to serum bottle, but shocked when 5 and 10 ml respectively. 2. When raw, pretreated + glucose, and pretreated wastewaters were applied to UASB reators, the results of VLR were obtained 8-10, 3-5, and 2-4 kg cod/㎥ ·d respectived. Result of raw wastewater was the most optima of three. 3. The correlations VLR with bio-gas were obtained 90.5, 46.4 and 34.6% respectively in raw, pretreated + glucose, and pretreated wastewaters. Result of raw wastewater was the most optima of three. 4. In batch assay, pretreatment wastewater is better than raw water, but in continuous assay, raw wastewater is better than pretreatment wastewater. This reason is consideated that unsoluble salt of 373 mg/l is accumulated within UASB reactor, and carries out inhibition to anaerobic bacteria.

완전대혈관 전위의 심방내 교정술 후 추적 관찰

김연우,노정일,허준,윤명자,김호성,최정연,윤용수,양세원,이정렬,김용진,노준량 대한순환기학회 1998 Korean Circulation Journal Vol.28 No.5

cDNA array 방법을 이용한 망간에 노출된 흰쥐 뇌기저핵의 유전자발현 분석

이채관,노성민,문덕환,,김정호,손병철,김대환,이창희,김휘동,김정원,김종은,안진홍,이채언 大韓産業醫學會 2005 대한직업환경의학회지 Vol.17 No.4

Objectives: This study investigated the gene expression profile in basal ganglia of manganese-exposed rats based on cDNA array analysis. Methods: For cDNA array, 25 male Sprague-Dawley rats (250±25 g) were intraperitoneally injected with 25 ㎎/㎏ B. W./day of MnCl2 (0.3 ㎖) for 10 days. For dose-related gene expression analysis, rats were intraperitoneally injected with 0.2, 1.0, and 5.0 ㎎/㎏ B. W/day of MnCl2 for 10 days. Control rats were injected with an equal volume of saline. RNA samples were extracted from brain tissue and reverse-transcribed in the presence of [α^(32)P]-dATP. Membrane sets of the Atlas Rat 1.2 array Ⅱ and Toxicology array 1.2 kit (Clontech, Palo Alto, CA) were hybridized with cDNA probe sets. Northern blot hybridization method was employed to assess the dose-related gene expression. Results: Fifty-two genes showed significant changes in expression of more than two-fold. Twenty-eight were up-regulated and 24 were down-regulated in the manganese-exposed group compared to the control. Among the 52 genes, 28 genes including nuclear factor I-X1 (NF1-X1), neuroligin 2 and 3, mitochondrial stress-70 protein (MTHSP70), neurodegeneration-associated protein 1 (Neurodap 1), multidrug resistance protein (MDR), and endoplasmic reticulum stress protein 72 (ERP72), were reported for the first time related to the manganese-induced neurotoxic-metabolism in the rat basal ganglia. According to the dose-related gene expression analyses, MTHSP70, Neurodap 1 and ERP72 genes were up-regulated compared to the control even in the group exposed to low manganese dose ( 0.2 ㎎/㎏ B.W./day). Conclusions: Twenty-eight genes detected for the first time in this study were closely related to the manganese-induced neurotoxic-metabolism in the rat basal ganglia and further study of these genes can give some more useful information about the manganese metabolism.

기호학적 접근을 통한 웹 페이지 이해 과정 탐색 : 화학교육 홈페이지를 중심으로

한재영,김은혜,차정호,노태희 경북대학교 사범대학부속 중등교육연구소 2007 중등교육연구 Vol.55 No.1

Antioxidant and Anti-Inflammatory Effects of Rhei Rhizoma and Coptidis Rhizoma Mixture on Reflux Esophagitis in Rats

Kwon, O Jun,Kim, Min Yeong,Shin, Sung Ho,Lee, Ah Reum,Lee, Joo Young,Seo, Bu-il,Shin, Mi-Rae,Choi, Hyun Gyu,Kim, Jeong Ah,Min, Byung Sun,Kim, Gyo-Nam,Noh, Jeong Sook,Rhee, Man Hee,Roh, Seong-Soo Hindawi Publishing Corporation 2016 Evidence-based Complementary and Alternative Medic Vol.2016 No.-

<P>The purpose of this study was to investigate the antioxidant and anti-inflammatory effects of the combined extract of Rhei rhizoma and Coptidis rhizoma (RC-mix) in experimental model of acute reflux esophagitis. The antioxidant activity was assessed by<I> in vitro</I> 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) assays. RC-mix was given at 100, 200, and 400 mg/kg body weight 2 h prior to induction of reflux esophagitis (RE). After 5 h, the effects of RC-mix treated rats were compared with those of normal and control rats. The representative flavonoid contents of RC-mix, such as sennoside A, epiberberine, coptisine, palmatine, and berberine, were detected using HPLC. The elevated esophageal mucosa damage was markedly ameliorated by RC-mix treatment in a dose-dependent manner. Furthermore, the administration of RC-mix reduced the increase of serum reactive oxygen species (ROS) and peroxynitrite (ONOO<SUP>−</SUP>). The improvement of superoxide dismutase (SOD) and heme oxygenase-1 (HO-1) levels were marked in the group given RC-mix. Moreover, the elevation of inflammatory mediators and cytokines by nuclear factor-kappa B (NF-<I>κ</I>B) activation in control rats decreased by RC-mix pretreatment. These results indicate that RC-mix treatment reduces the pathological states of esophagitis<I> via</I> regulating NF-<I>κ</I>B mediated inflammation related to oxidative stress. </P>

Seasonal Features of Global Meridional Heat Transports by the Atmosphere and Ocean

Ho-Jeong Shin,Jeong-Woo Kim,Hye-Young Chun,Yign Noh 한국기상학회 2008 한국기상학회 학술대회 논문집 Vol.2008 No.-

A STUDY ON THE DETERMINANTS OF FRANCHISING IN KOREAN FOOD SERVICE INDUSTRY

Ho-Jeong Noh,Duk-Hwa Yun,Jee-In Jang,Da-Ae Jung,Min-Ho Cho 글로벌지식마케팅경영학회 2014 Global Marketing Conference Vol.2014 No.7

Purpose This study, for the first time attempts to investigate the determinants of the Korean foodservice franchising employing various theories. In addition this study attempts to consider distinguishable foodservice characteristics such as the segment of foodservice and the market demand. This study expects to contribute to the theoretical underpinnings of the foodservice franchising by incorporating distinguishable foodservice characteristics to franchising theories. Method The sample for this study came from uniform franchise offering circular based on Korea Fair Trade Commission. There were 1,598 food service franchisors in uniform franchise offering circular 2009-2011 listing. However, 596 were excluded because of data irregularities remaining 1,002 available for sample. Based on the literature review, we choose seven determinants. The seven determinants were measured as follows. Firm age was measured as two proxy variables. One was measured as the years of franchising business. The other was measured as the years of business. Firm size was measured as total sales. Capital scarcity was measured as the ratio of total debt to total asset. Start-up costs were measured as initial investment. Monitoring costs were measured as the number of major cities franchised units operates. Royalty was measured as sales of a franchised unit. Finally, brand name was measured as advertising expenditures. Results The first proposition (firm age is related to the use of franchising) was supported by the signaling theory and the transaction costs theory instead of the resource scarcity theory. The age (measured as the years of franchising business) had a statistically significant positive relationship with the use of franchising. The second proposition (firm age is related to the use of franchising) was supported by the logic of the resource scarcity. The age (measured as the years of business) had a statistically significant negative relationship with the use of franchising. The third proposition (firm size is related to the use of franchising) was supported by the signaling theory instead of the resource scarcity theory. The firm size had a statistically significant positive relationship with the use of franchising. The fourth proposition (capital scarcity is related to the use of franchising) was not supported by the resource scarcity theory. The capital scarcity had not a statistically significant positive relationship with the use of franchising. The fifth proposition (start-up costs is related to the use of franchising) was not supported. The start-up costs had not a statistically significant either positive or negative relationship with the use of franchising. The sixth proposition (monitoring costs is related to the use of franchising) was supported by the agency theory. The monitoring costs had a statistically significant positive relationship with the use of franchising.. The seventh proposition (royalty is related to the use of franchising) was not supported by the agency theory. The royalty had not a statistically significant positive relationship with the use of franchising. The eighth proposition (brand name is related to the use of franchising) was not supported by the agency theory. Brand name had not a statistically significant negative relationship with the use of franchising. Conclusions Five propositions were found to be statistically significant from eight propositions. The four determinants such as firm age, firm size, monitoring costs, and brand name can affect the use of franchising for the foodservice industry in South Korea. Relating the significant propositions to the diverse theories, there was no one theory that dominated all propositions. The signaling theory was more appropriate for both firm age (the years of franchising business) and firm size while the transaction costs theory was more appropriate for age (the years of franchising business) as well. In addition, the resource scarcity theory was more appropriate for firm age (the years of business). Finally, the agency theory was appropriate for monitoring costs although this theory needed to be ameliorated for brand name.