합성섬유를 혼입한 콘크리트의 강도 및 내구특성

홍창우,정영화,이주형,이정호 江原大學校 産業技術硏究所 1998 産業技術硏究 Vol.18 No.-

Concrete structures has been deteriorated by poor environment. This study was conducted to evaluate durability of concrete which are increasingly demanded recently. Therefore, the research of durability must be executed for application of Polypropylene fiber reinforced concrete real structures. Concrete durability properties incorporating Polypropylene fiber was performed with the variable of Fiber contents, Fiber type and Target strength, specimens were made and subjected to durability and strength tests. The results show that strength of concrete is increased the Fiber content increase, Mono-Filament fiber and Polypropylene fiber reinforced concrete makes improved durability properties.

Advanced Indentation System을 이용한 연성 파괴인성 평가식의 모델링

주장복,이정석,심홍석,이승건,권동일 대한금속재료학회 2004 대한금속·재료학회지 Vol.42 No.1

Fracture properties of various structural steels were determined non-destructively using the advanced indentation system (AIS), which is developed on the basis of continuous indentation technique. In this study, conventional critical strain model was modified to predict the ductile fracture toughness from the AIS data. In deriving the ductile fracture toughness model, fracture strain and characteristic length were estimated using the stress triaxiality and the work-hardening exponent. AIS tests were conducted on carbon steels, stainless steels, aluminum alloys and copper alloys. For all these materials, the results of indentation test were compared to those of the standard fracture toughness test methods, which shows that the present analysis can predict successfully the ductile fracture toughness of structural steels.

외상 후 발생한 무지의 Boutonniere 변형

주홍실,권호,정성노 大韓成形外科學會 2004 Archives of Plastic Surgery Vol.31 No.3

鉛暴露 作業者의 鉛中毒 早期發見을 위한 集團檢診法 改善方案에 관한 硏究

홍대용,김장락,정주화,최현림,윤형렬 慶尙大學校 1995 論文集 Vol.34 No.1

This study was carried out to evaluate the feasibility of current lead indicators used in screening lead who were sspeted to have been exposed to lead were selected as 'case'and 207 female workers from non-lead industry were selected for 'control'. The results obtained were as follows: 1. The mean values of blood lead for case and control were 31.4㎍/dl, 22.2㎍/dl,respectively. The difference observed in the mean concentration between case and control was statistically signifi-ant(P<0.01) 2. The mean values for blood ZPP by hematofluorometer for case and control were 31.3㎍/dl, 25.4㎍/dl,respectiely. And difference between two groups was statistically significant(P<0.01). 3. No statistically significant correlation was found between working duation and blood lead, blood ZPPlovel. 4. According to the simple correlation analysis,ZPPand urine lead were found to be statistically correlated with blood lead(P<0.01) 5. According to the discriminant analysis using blood lead as a dependent variable, it showed 89.1% predictability when using 40㎍/dl as a cutting value which is used as a screenig cutting value for industry workers health examination, while 81.8% for 30㎍/dl,77.54% for 20㎍/dl, respectively. 6. Lead related simptons which is used for screening the lead ntoxicated patients were used as a dependent variables in multiple regression analysis to find useful lead indicator. And significant independent variables were found to be ZPP, Age, and Hct. 7. Above results suggest that objective evalution of feasibbility of several lead indicators should be developed to correct the disutility of current lead screeng system in Korea.

서울시 역세권 주차장의 운영 합리화에 관한 연구

고주연,금기정,김현정,김현주,홍영식 明知大學校 産業技術硏究所 1995 産業技術硏究所論文集 Vol.14 No.-

In this study, we study about park and ride facilities at subway station in seoul, since we have perceived that park and ride facilities at subway's station's serious problem on its operation and usage. We practiced the interviews and transfer rate survey so found these problems of operation usage problem, spatial utilization, private park and ride facilities. Through the analysis of these problem we propose the adequate alternatives and we hope that our study contribute operation rationalization of park and ride facilities at subway station.

교잡종 찰옥수수에 대한 연구 III : Ⅲ. 국내 옥수수 유전자원 수집종에 대한 주요 특성 분포

서정은,주현민,최윤표,홍범용,조양희,주정일,지희정,이희봉 충남대학교 농업과학연구소 2007 농업과학연구 Vol.34 No.2

2006년 국내 각 지역으로부터 수집된 재래종옥수수 유전자원을 관행방법에 의해 파종하고 주요특성별로 분포도를 살펴본 결과는 다음과 같다. 1. 수집된 유전자원에 대한 발아율은 대부분 80∼100%이상의 분포를 보였으나, 일부 수집계통에는 30% 미만의 극히 저조한 발아율을 보였다. 2. 수집자원에 대한 초기생육을 살펴보면 극히 생육이 저조한 것이 40% 정도를 보였고, 극히 우수한 자원은 3%미만으로 나타났다. 3. 간장은 대부분이 150∼199cm범위에 55%가 분포하고 있었으나, l00cm이하가 5%, 250cm이상이 8%로 나타나 수집종간에 큰 차이를 보였다. 4. 주당 분얼수는 1개 미만이 40%의 분포를 보였으나, 일부 수집종에서 2 내지 3개의 분얼수를 보이는 계통이 확인되었다. 5. 개화소요일수는 61∼64일의 범위에서 40%, 57∼60일의 범위에서 30%의 분포를 보였으며, 특히 일부 수집종의 경우 55일 이하의 극조생종도 10% 정도의 분포를 보였다. 6. 이삭길이는 대부분 11∼15cm범위에 60%가 포함되어 있으나, 일부계통에서 5cm미만이 2%, 16∼20cm의 이삭길이도 10%가 분포하였다. Germination ratio on the 300 collected genetic resources showed 80 to 100 percentage, but those of some accessions were very low as below 30 percentage. Early growth phase of most of these lines were very poor while some collected lines were very vigor. Range of stem height showed from 150 to 199cm, but that of some accessions showed below 100cm as five percentage and some of them was over 250cm as eight percentage. Number of tillers per plant appeared less one but some collected lines have two to three tillers per plant. In days to tasseling, some accessions showed more four per plant. Ear length of these accession showed above 60 percentage as 11 to 15cm, while that of some collected lines showed over 10 percentage as 16 to 20cm.

삽목시기, 삽상온도 및 생장조절제처리가 낙우송의 발근에 미치는 영향

김홍열,박정주,이영주,고재철 대구효성가톨릭대학교 응용과학연구소 1997 응용과학연구논문집 Vol.6 No.1

낙우송의 경삽시 발근 및 캘루스형성에 미치는 삽수채취시기, 삽상온도 및 여러 가지 생장조절물질의 효과에 대하여 조사하였다. 4월 3일, 4월10일, 4월 17일, 5월 22월에 삽수를 채취하여 발근 및 캘루스형성에 미치는 영향을 조사한 결과 발근은 4월 17일이 가장 좋았으며 그 다음이 4월 10일 이였다. 캘루스형성율의 경우 4월 17일이 가장 좋았으며 다음이 5월 22일 이였다. 삽상온도는 삽수채취시기에 관계없이 20℃가 발근 및 캘루스 형성에 가장 효과적이었다. NAA, IAA, S-07처리에 의해서 캘루스형성이 촉진되었다. This experiment was carried out to evaluate the effects of cutting date, bed temperature and growth regulators on the rooting of stem cuttings of Taxodium distichum (L.) Rich. As a result of investigation for the rooting and callus formation of stem cuttings which were cutted at 3, 10, 17 April and 22 May respectively, rooting cutted at 17 April was best and 10 April in the next. And callus formation rate was highest at 17 April and 22 May in the next. Under 20℃ bed temperature, rooting and callus formation were better than 30℃ regardless of cutting dates. Callus formation was promoted by NAA, IAA, and uniconazole treatments.

유전체디스크가 삽입된 원통형공진기의 TM01q +∂모드 공진 해석

허정,강순국,최홍주 건국대학교 산업기술연구원 1998 건국기술연구논문지 Vol.23 No.-

We proposed a new method to find the ranges of TM(TM01q +∂) resonance mode for a dielectric-disc-loaded circular cylindrical cavity using Mathematica program. The function ContourPlot of Mathematica program shows the charts of resonance frequency. Using this method the ranges of resonance frequency was calculated and the modes of the resonance frequency could be classified. From the characteristic equation the exact resonance frequency of dielectric-disc-loaded circular cylindrical cavity was obtained, with the same procedure.

출류(朮類)한약재의 외,내부형태와 이화학패턴 연구

김정훈 ( Jung Hoon Kim ),이금산 ( Geum San Lee ),최고야 ( Go Ya Choi ),황성연 ( Sung Yeoun Hwang ),김홍준 ( Hong Jun Kim ),정승일 ( Seung Il Jeong ),주영승 ( Young Sung Ju ) 대한본초학회 2009 大韓本草學會誌 Vol.24 No.2

Objectives: To determine the discriminative criteria for Atractylodes rhizomes, the experiment of external-internal characteristics and physicochemical pattern analysis were performed. Methods: External characteristics was observed using stereoscope. The sectioned materials which were covered with parffin were stained by Ju`s method. Physicochemical patterns were analyzed using HPLC/DAD. Results: 1. External shape of original plant: Atractylodes macrocephala and A. japonica had relatively long petioles and 3-5 parted leaves. A. macrocephala had big purple flowers whereas A. japonica had relatively small white flowers and pinnate bracts. A. lancea had sessile leaves and white flowers, and the end parts of degenerated stamens were bent. 2. External shape of herbal medicine: A. macrocephala which was fist-shaped rhizome had pa-pillate processes and the cross section was light gray and sulcate. A. japonica and A. lancea were connected-beady or tubercular rhizomes, and the cross sections were both yellow-colored white. However, the cross section of A. japonica was fibrous, the width of cortex was narro-wer than that of stele, and radial shape in cortex was rare, whereas the width of cortex in A. lancea was similar to that of stele in size, and radial shape in cortex was obvious. 3. Internal shape of herbal medicine: A. macrocephala and A. lancea did not have lignified fascicles in cortex. However, the vascular bundles and vessels of A. macrocephala were wedge shaped and radial arrangement, and vascular bundles were densely populated in stele whereas those of A. lancea were repeatedly arranged and thinly extended to cortex. A. japonica had lignified fascicles in cortex and the width of vascular bundles was conspicuously thick with narrow intervals. 4. Physicochemical pattern analysis: A. macrocephala and A. lancea contained atractylenolide Ⅰ and atractylenolide Ⅲ whereas A. japonica contained atractylenolide Ⅰ, atractylenolide Ⅲ, diacetyl-atractylodiol, compound-4, compound-5. The three species of Atractylodes rhizomes showed different chromatogram patterns. Conclusions: The results could be used as discriminative criteria for Atractylodes rhizomes and as fundamental materials to researches of further pattern analysis and biological reaction.

전해질 불균형과 동반된 신경이완제 금단 악성 증후군 1예

선홍주,김성호,이두영,선제형,박진석,박옥영,신정현,김현리,이승 朝鮮大學校 附設 醫學硏究所 2004 The Medical Journal of Chosun University Vol.29 No.1

Electrolytcs disturbance is one of the common medical problems encountered in chronic schizophrenic patients. Recently, we experienced a case of a 50-year-o1d man schizophrenic patient with severe hypokalemia (K:1.62 mEq/L) and hyponatremia (Na:100.8 mEq/L), which developed after psychogcnic polydipsia, followed by projectile vomiting. Aftcr admission, patient presented dysphagia, rigidity, tremor and mental change. We first considered that those symptoms were caused bv electrolyte disturbance. Thcretbrc, we corrected hypokalemia and hyponatremia. However despite of appropriate fluid therapy with electrolytes correction, these symptoms not resolved. But, after administration of antrpsychotic drug, symptoms were alleviated. Wc concluded patient's symptoms may be attributed to withdrawal ncuroleptic malignant syndrome (WNMS). In chronic schizophrenic patient, patient's symptoms were not sufficient to differentiate between hypokalemic psychosis and an exacerbation of schizophrenia. We report a case with brief literature review. 저자들은 과다 수분 섭취와 사출성 구토로 인한 전해질 불균형 소견을 보인 만성 정신분열병 환자에서 수일간 투여 중단 하였던 항정신병 약물의 투여로 사지 마비와 경직, 연하곤란, 구음장애 등이 호전되었음을 관찰하고, 정신 분열병 환자의 급격한 임상 양상의 변화가 약물의 금단에 의한 정신 질환의 악화임을 임상적으로 경험하였기에 문헌 고찰과 함께 보고하는 바이다.