연속 섬유강화 복합재료 리바 개발에 관한 연구

한길영,이동기,김성용 朝鮮大學校 機械技術硏究所 2000 機械技術硏究 Vol.3 No.2

This paper describes the need for a ductile Fiber Reinforced Plastic(FRP) reinforcement for concrete structures. Using the material hybrid and geometric hybrid, it is demonstrated that the pseudo-ductility characteristic can be generated in FRP rebar. Ductile hybrid FRP bars were successfully fabricated at 4mm and 10mm nominal diameters using an hand lay up method. Tensile specimens from these bars were tested and compared with behavior of FRP rebar and steel bar. The summarized results are as follows : The tensile strength of CFRP, KFRP and GFRP rebar with nominal diameter ψ4mm, respectively, showed 91.7kg/mm^2, 66.5kg/mm^2, 53.6kg/mm^2. The tensile strength of CFRP, KFRP, GFRP rebar with nominal diameter ψ10mm by the hand lay up method, respectively, showed 125.4kg/mm^2, 54.1kg/mm^2, 46kg/mm^2.

콘크리트 구조물용 GFRP리바의 기계적 특성에 관한 연구

한길영,이동기,김성용,전상기,최종대,박준식 조선대학교 에너지.자원신기술연구소 2000 에너지·자원신기술연구소 논문지 Vol.22 No.2

In this paper was studied on the mechanical characteristics of Glass Fiber Reinforced Plastics(GFRP) of the steel bar it is to replace The advantage of FRP such as high strength low weight and chemical inertness or noncorrosiveness can be fully exploited. GFRP bar were successfully fabricated at 10mm nominal diameters and hollow types using a pultrusion method Tensile and bending specimens from this bar were tested and compared with behavior of GFRP rebar and steel bar.

Dioxin류의 반응에 대한 분자궤도함수론적 연구 : dibenzo-p-dioxin, 2,7-dichlorodibenzo-p-dioxin, dibenzofuran, 2,8-dichlorodibenzofuran 중심으로

한성욱,이길준,김복조 경운대학교 산업기술연구소 2001 産業技術硏究論文誌 Vol.3 No.2(B)

Molecular orbital studies for dibenzo-p-dioxin, 2,7-dichlorodibenzo-p-dioxin, dibenzofuran and 2,8-dichlorodibenzofuran were carried out by semiempirical PM3 method. Reaction sites for nucleophilic, electrophilic and radical reaction of dioxins were predicted and discussed by MO studies. The values of approximated superdelocalizability were 0.7802, 0.2686, 0.3104, 0.1982 for the above dioxins, respectively. And reported rate constant for the reaction of dioxins with OH radical (Eitzer et. al.. Environ, Sci. Technol. 1989, 23, 1389) was well correlated with approximated superdelocalizability.

폐의 병태생리

한길로,황적준 大韓法醫學會 1997 대한법의학회지 Vol.21 No.2

The lungs are constructed to carry out their cardinal function, the exchange of gases between inspired air and the blood. Because of air pollution and smoking, primary respiratory infections, such as bronchitis, bronchopneumonia, and other forms of pneumonia, are commonplace in clinical and pathologic practice. Malignancy of the lungs has risen steadily in incidence. So review of diseases of lung is necessary to remind pathologic aspect of lungs.

D8S210 유전자 과변이부위의 클로닝과 한국인에서 집단유전학적 분석을 통한 법의학적 활용성에 관한 연구

한지수,한길로,염범우,황적준 大韓法醫學會 1997 대한법의학회지 Vol.21 No.2

A multi-locus probe. called pHK-450. detecting multiple variable DNA fragments, was constructed by cloning of the 450 bp fragments into pCR?? vector, which could be obtained from amplification of the variable region of the D8S210 locus of human genome with a primer set of UF1. UR1, and UR2. The sequence data shows that the variable region is entirely G-C rich on one strand consisting of tetranucleotide repeat unit (GGAA)n at both margins and internally diversed regions with simple irregular repeat units of GGAA, GGAG, or GGGAA. The genetic complexixty of the resulting individual-specific DNA patterns was investigated by studying a Korean pedigree(both parents and 10 children). HaeIII and HinfI-generated DNA fragments are inherited to their children in a Mendelian manner with segregation ratio of 1:1.05 and 1:1.14. respectively. In the HinfI-digested genomic DNAs, the segregation of up to 25 variable DNA fragments from both parents could be analysed in a single sibship. Most of these variable DNA fragments detected by pHK-450 probe are not paired as allele, which suggests that they may be derived from 23 heterozygous loci. In the HaeIII-digested genomic DNA, 26 variable DNA fragments are segregated from both parents to 10 children. Excluding one allelic and three linked DNA fragments, 22 out of 26 scored DNA fragments may be derived from 23 hetrozygous loci. To determine the variability of DNA fragments, DNA samples from 113 unrelated Korean were digested with HinfI and hybridized using pHK-450 probe. Pairwise comparisons of individual variable DNA fragments show that the polymorphic patterns were highly specific to an individual. The mean probaility(X) that fragments in A individual is present in B individual is 0.0337. From the degree of maxiaml sharing, band approximate estimates of mean allele frequency and homozygosity is calculated being 0.187 and the mean heterozygossity is 89.69%. For pHK-450 probe, the probability that all 10 resolved DNA fragments in the 5-30 kb size range in an individual A are also present in a second unrelated individual B is (0.337)?? or 7.1 X 10??

알루미늄 샌드위치 판넬의 전자파 차폐효과

한길영,김진석,안동규 朝鮮大學校 機械技術硏究所 2006 機械技術硏究 Vol.9 No.1

The objective of this research is to investigate the electromagnetic interference(EMl) shielding characteristics of aluminium sandwich panel. We fabricated aluminium sandwich panel with core material Ni-Cu fabrics. The measurements of shielding effectiveness(SE) were carried out frequency range 300MHz -1 GHz for commercial purposes such as electric or telecommunication devices. The return loss and loss due to absorption were also measured as a function of frequency in the microwave(300MHz-1GHz) region. It is observed that the SE of the composites is the frequency dependent, increases with the increases in filler loading. The Ni-Cu fabrics core material showed higher SE compared to that of AI. The aluminium sandwich panel was shown to exhibit up to 40dB of SE.The results indicate that the composite having higher filler loading can be used for the purpose of EMI shielding as well as for some microwave applications.

해수 환경에서의 철근과 GFRP리바의 굽힘강도 특성에 관한 연구

한길영,최명선,곽상묵 朝鮮大學校 機械技術硏究所 2003 機械技術硏究 Vol.6 No.1

Fiber reinforced plastics(FRP) attracted muGh attention as a form of concrete reinforcement in the past decade. Compared with existing construction matrials, FRP possesses many advantages such as light-weight. high-strength, corrosion resistant properties, etc. Among other fabrication process of GFRP, pultrusion is one of the promising ones for civil infrastructure application. This paper describes the need for a ductile Fiber Reinforced Plastics (FRP) reinforcement for concrete structures. To promte the degradation of the adhesive condition a t the fiber-matrix micro interface without matrix dissolution loss were carried out in salt water surrounding. The absorption properties and the bending strength were compared about GFRP rebar and steel bar. Due to the fiber permeability absorption of moisture take place through both the fiber and the matrix. The diffusivities obtained for Glass-Polyester are found to be in good agreement with those available in the existing literature.

소인형 장인이 등장하는 옹서대립담 연구 : 여주인공의 입장을 중심으로 mainly in the position of heroins

한길연 한국고소설학회 2003 古小說 硏究 Vol.15 No.-

본 고는 옹서대립감을 종합적으로 고찰하기 위한 시론으로, 이를 위해 옹서대랍담 가운데 특히 편수가 많고 성격이 유사한 <명주기봉>, <옥원재합기연>, <창난호연록>, <양현문직절기>의 '소인형 장인'이 등장하는 옹서대립담을 검토하였다. 이들 옹서대립담에서는 소인 혹은 악인형 인물 대 군자 혹은 선인형 인물로 친가와 시가의 구성원이 대비되는 가운데 친가가 극도로 열세에 놓임으로써 여주인공은 친가에 대한 원죄의식을 지니고 시가에서 살아가게 된다. 즉 소인형 장인이 등장하는 옹서대립담은 여성의 한스러움이 내부로 응축되는 과정과 밖으로 발산되는 과정을 형상화한, '한의 미학'이라 할 수 있는 단위담으로서의 의미를 지닌다. 각각의 단위담들은 장인의 소인됨의 정도, 남편의 장인에 대한 반감의 수위에 따라 여주인공의 한이 발현되는 양상이 달라지기에 다음과 같이 특징지을 수 있었다. 단순 소인형 장인이 등장하는 <명주>에서는 여주인공의 한을 표출하는 양상들이 주로 펼쳐지기에 이를 '한의 발산'으로, 사위 가문의 적대정치세력의 하수인으로서의 장인이 등장하는 <옥원>에서는 옹서가 대국적으로 화해하는 가운데 한을 이상적으로 극복하기에 이를 '한의 승화'로, <창난>은 <옥원>과 흡사한 구조를 지니지만 장인 개과하지 않음으로써 한을 풀 수 있는 계기들이 마련되지 않기에 이를 '한의 체념'으로, 사위 가문의 적대정치세력의 주동자인 장인이 등장하는 <양형문>에서는 여주인공이 친가에 대한 원죄의식의 무게에 짓눌려 한스럽게 살아가기에 이를 '한의 응축'으로 구분하였다. '한의 미학'으로서의 옹서대립담은 주독자층인 여성 독차의 입장에서도 중요한 의미를 지닐 수 있다. 정치적으로 兩家가 반목하는 경우가 적지 않았고, 장인을 경시하는 풍조가 만연했던 조선후기의 시대적 배경 속에서 여성 독자들은 친가에 대한 원죄의식으로 갈등하는 여주인공의 입장에 자신의 입장을 투영하여 자신들의 감정을 대리 표출했으리라 추정할 수 있다. <Mywongjookibong>, <Okwonjaehapkiyeon>, <Changlanhoyeon>, <Yanghyeonmunjikjulki> in which mean-type fathers-in-law appear are commented to be female centric novels. And husband-and-wife fights mediated by troubles between a father-in-law and a son-in-law spread out in these works. So in this thesis I re-examined these works from the position of heroin in agony between a father-in-law and a son-in-law. The tales of troubles between a father-in-law and a son-in-law, in which mean-type father-in-law appears are meaningful units for their 'aesthetics of lament'. Each work can be classified as these; <Myeongkookibong> as lament's blowing type, <Okwonjaehapkiyeon> as subliming type, <Changlanhoyeon> as renouncing type, <Yanghyeonmunjikjulki> as compressing type. To examine these tales from the point of 'laments' aesthetics ' is very meaningful for the position of female readers besides for the work itself. In the prevalent trend of despising father-in-law as late Chosun Dynasty, it seems that female readers reflected their position to heroine of these works and expressed their own emotions and desires vicariously. Owing to the verisimilar depiction of experiences and emotions of real life, the tales which deal with troubles between a father-in-law and a son-in-law, in which mean-type fathers-in-law appear are female centric.

Ellipticine과 그 이성질체들에 대한 분자궤도함수론적 연구

한성욱,이길준,김복조 경운대학교 산업기술연구소 2002 産業技術硏究論文誌 Vol.5 No.1(B)

Molecular orbital studies were carried out for the ellipticine and its isomers, known as having antitumor activity and cytotocity, by semiemperical PM3. Electrostatic potential studies have shown that the most reactive site of proton attacks was the nitrogen atom in carbazol ring. The net charge of the nitrogen was linearly correlated with the basicity of the isomers. We have predict the antitumor activity of the isomer by the basis of the dipole moment [suggested by Barone et.al. J. Mole. Stru.(Theochem) (1992), 253, 319]. And we have suggested that frontier orbital theory is valuable to explain for the formation of covalent adducts. These results may suggest clues that the method how to interpretate the mechanism of action for ellipticine and how to design new drugs.

폐흡충에 의한 무균성 노흉에 대한 돼지꼬리형 도관(pig-tail catheter)을 이용한 치료의 효과

한경택,권세훈,김형호,하재화,선길홍,권용은,윤성호,이승일 朝鮮大學校 附設 醫學硏究所 2006 The Medical Journal of Chosun University Vol.31 No.3

Background: Pulmonary paragonimiasis is caused by consumption of raw or improperlycooked crustacea infected with the laval stage (metacercaria) of Paragonimus westermani. The most characteristic symptoms were rust-colored sputum and cough. Paragonimiasis causes pleural thickening or effusion in 48% of the patients. Pleuro-pulmonary paragonimiasis can be easily overlooked by physicians who do not suspect this disease in the differential diagnosis. Method: We compared the outcomes of 11 patients with paragonimus empyema managed either through thoracotomy or pig-tail catheter drain. These patients were confirmed by food history, clinical and radiological findings, and laboratory data. Results: The male and female ratio was 1.75 : 1, and mean age was 40.0 ± 13.5 years. AII patients had pulmonary symptoms such as cough or chest pain. Serum-ELISA for paragonimiasis were all positive (mean titer was 0.57). AII patients had pleural effusion in radiological findings( 2 patients had bilateral pleural effusion). All patients received praziquantel (75 ㎎/㎏/day for 3days). Two patients were treated with thoracotomy and nine patients were treated with pig-tail drain. Hospital stay were 14.5 days in thoracotomy group and 5.6 days in pig-tail group respectively, Conclusion: Compared to the conventional thoracotomy grouP, the patients with paragonimus empyema who received pig-tail catheters had a significantly-decreased period of drain in situ, were clinically improved earlier, and were discharged earlier.