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      • 이리역 폭파사고에 대한 폭파공학적 고찰

        허진 대한건축학회 1978 建築 Vol.22 No.4

        Explosive accident at Iri was brought by firing 26 tons of explosives and detonating cap caused by candle light. It was already reported by investigator's that the accident led to around 1,000 of dead and wounded persons, around 10,000 of Victim's and 86 millions won of property damages. This paper is to study the functional relationship between the disaster of lives and properties and the air blast, Vibration and pound blast resulted by explosion. During explosion in quarry, the most of energy is consumed for blasting surrounding Rocks and only 0.5 to 20% (B-5) of it is propagated through Seismic waves and vibrates basement. During the explosive accident at Iri only 5 (B-6) of total energy was consumed to vibrate basement and rest of it was air blast since the accident occurred on the ground. Therefore, The following results are derived between the distance from The Center of Iri railroad station and Viration, sound blast and the degree of damage. 1) With l00m of diametor: Composite effect by vibration and air blast 2) Between 100m and 1,000m of diametor: effect by air blast 3) Over 1,000m of diametor: effect by the prapayation of sound blast.

      • 지능형 자동차용 전동 시스템 및 구동모터 개발

        허진 에스케이텔레콤 (주) 2009 Telecommunications Review Vol.19 No.5

        차량의 전자화, 전동화 및 고 기능구현을 위한 통합제어에 대한 요구는 차량 내에서의 전기부하를 크게 증대시키고 있다. 특히 기존의 엔진을 이용한 기계적 출력에 구동되던 많은 차량의 장치를 전기적인 구동원으로 대체시키는 전동 화의 증대로 이어지고 있다. 또한 이러한 전동화의 증대는 보다 많은 새로운 전력수요 요구를 가져와 42V 전원체계로 의 전환요구가 증대되고 있다. 전동조향 장치와 전동냉각모듈이 대표적이 예로서 본 논문에서는 이러한 장치의 개발 에 있어 보다 고효율의 전동모터 및 구동 제어기의 개발 결과를 나타내고 있다. 특히 이러한 장치의 소형 고출력화를 위해 보다 높은 출력밀도를 가지는 브러시리스형 영구자석 모터가 개발에 적용되었으며 각각의 시스템의 성능 개선을 위해 최적화되었다. 개발된 결과는 실험을 통하여 개발의 효용성을 확인하였다.

      • KCI등재

        Character of Listeria spp. isolated from livestock products and their related environmental areas

        허진,김준만,박용호 한국동물위생학회 2010 韓國家畜衛生學會誌 Vol.33 No.1

        This study was carried out to investigate the characters of Listeria monocytogenes isolated from food, animal feces, dry cattle food, and the environment in Seoul and Kyonggi province during the period from 1998to 2003. Serotyping of 70 L monocytogenes isolates was performed according to the manufacturer’s instruction. Minimum inhibitory concentrations (MICs) were determined by the microdilution method according to the guidelines of the Clinical and Laboratory Standards Institute. All the isolates were tested against 20 antimicrobial agents. The serotypes of the 70 L monocytogenes isolates were 1/2c (62.8%), 1/2a (20%) and 1/2b (17.2%). Of the 70 L monocytogenes isolates, 67.1%, 57.1%, 11.4%, 5.7%, 2.8%, 1.4% and 1.4%were resistant to tetracycline (Te), minocycline (Mi), norfloxacin (Nor), ciprofloxacin (Cip), neomycin (N), chloramphenicol (C) and cephalothin (Cf), respectively. However, all isolates were 100% sensitive to antibiotics such as amikacin, ampicillin, erythromycin, gentamycin, imipenem, kanamycin, ofloxcin, streptomycin, penicillin, trimethoprim, trimethoprim/sulfamethoxazole, tobramycin, and vancomycin. Multiple resistance patterns of the isolates were observed in TeMiNor Cip (1.4%), TeMiNor (7.1%), TeMiCip (2.9%), TeMiN (1.4%) and TeMi (44.3%). The results of this study indicate that many L monocytogenes isolates are resistant to antimicrobial agents including Te and Mi. The possibility that the isolates could increasingly acquire multiple antimicrobial resistant properties cannot be precluded.

      • KCI등재

        Efficacy of Brucella abortus strain RB51 vaccine in Korean mongrel dogs against virulent strains of B. abortus biotype 1 and B. canis

        허진,백병걸 한국동물위생학회 2010 韓國家畜衛生學會誌 Vol.33 No.1

        This study was performed to test the hypothesis that Brucella abortus strain RB51 (SRB51) might protect Korean indigenous mongrel dog against challenge with either virulent B. abortus biotype 1 or B. canis. A total of 12 Korean mongrel dogs were divided into four groups (Group A, B, C and D). Dogs belonging to Group A and C were inoculated subcutaneously with 1×109 CFU of SRB51 in 1ml of sterile phosphate buffered saline (PBS). Dogs of Group B and D were inoculated subcutaneously with 1ml of sterile PBS as control. At 12 weeks post vaccination, dogs of Group A and B were challenged by oral inoculation of virulent strain of B. canis (5.0×109 CFU) and dogs of Group C and D were challenged by oral inoculation of virulent strain of B. abortus biotype 1 (4.4×1010 CFU). The serum antibodies titers in all dogs were monitored at regular interval for eight weeks after challenge (AC) by standard tube agglutination test, plate agglutination test, rose bengal test, 2-mercaptoethanol rapid slide agglutination test and 2-mercaptoethanol tube agglutination test. No antibody titers in Group A and C was detected. Also, the challenge strains were not found from blood of all dogs of Group A and C from 1 week AC till the end of the experiment by culture and modified AMOS-PCR, whereas B. canis and B. abortus challenge strains were detected from blood of Group B and D, respectively. In addition, neither of two challenge bacteria was recovered from liver, spleen, kidneys, lymph nodes and reproductive tracts of Group A and C dogs after postmortem. However,B. canis and B. abortus challenge strains were isolated from these tissues of Group B and D, respectively. These data suggest that SRB51 could be a promising vaccine candidate for immunizing dogs to control canine brucellosis caused by B. canis or B. abortus.

      • KCI등재

        A Quantitative Investigation of Prator's Hierarchy of L2 Learning Difficulty in Relation to Segment-Level English Pronunciation Teaching Agendas for Adult EFL Learners

        허진 국제언어인문학회 2009 인문언어 Vol.11 No.1

        This study seeks to investigate the relationship between Prator's Hierarchy of L2 learning difficulty and segment-level pronunciation learning difficulties that were observed among Korean adult EFL learners in 2006. A total of 148 student participants at a college-level institute took part in an empirical study on the comparison between the effects of two different EFL pronunciation syllabi. Out of the 148, only 93 students yielded a complete set of pronunciation data, namely the pre- and post- test results of L2 sound identification and L2 word read-aloud tests. Two native English-speaking instructors of English and two non-native instructors of English each taught four 70-minute lectures to the participants. Based on the descriptive analysis, the participants showed identification accuracy results that generally affirmed the predictions suggested by Prator, while they showed somewhat puzzling results concerning their read-aloud accuracy scores. Two additional factors of L2 sound learning difficulty are suggested based on the results of the read-aloud tests: 1) the L1 orthographic system, which is relatively transparent compared to the L2 orthographic system, and 2) the phonological context in which a certain L2 sound occurs.

      • KCI등재

        Low Current Driving of a Heat-assisted Magneto-optic Spatial Light Modulator Using an Amorphous DyFe Film with a Compensation Composition

        허진,Kenji Takine,Mitsuteru Inoue,Jooyoung Kim 한국물리학회 2010 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.57 No.61

        We developed a magneto-optic spatial light modulator (MOSLM), for all visible wavelengths, using amorphous rare earth-transition metal (RE-TM) film. The magneto-optical elements (pixels) were made of amorphous DyFe films with perpendicular magnetic anisotropy. The the amorphous DyFe film was determined to have 22 atom percent Dy, and the Curie temperature (Tc) was found to be 343 K. For magnetic switching in this MOSLM, heating to the Curie temperature (Tc) by using a laser radiation density of 5 mJ/cm2 and a driving current of 1 mA at all visible wavelengths were needed. In addition, we confirmed the switching speed of pixels for various laser radiation densities.

      • KCI등재

        하천 및 호소 수질관리를 위한 용존 자연유기물질 형광특성 분석

        허진,신재기,박성원 대한환경공학회 2006 대한환경공학회지 Vol.28 No.9

        Fluorescence measurements of dissolved organic matter(DOM) have the superior advantages over other analysis tools for applying to water quality management. They are simple and fast and require minimal pretreatment of samples. Fluorescence index(F450/F500), synchronous spectra, and fluorescence excitation-emission matrices(EEM) of various DOM samples were investigated to discriminate tochthonous/allochthonous composition, protein-like fluorescence, fulvic-like fluorescence, humic-like fluorescence, terrestrial humic-like fluorescence by comparing among the real DOM samples of different origins with the help of literature. The samples used included standard purified DOM, lake, river and wastewater treatment effluent. The relative distribution of various DOM composition was derived from the ratios of each fluorescence region. The results were very consistent with those expected from the sample properties. Allochthonous and terrestrial humic-like fluorescence were more prominent in the samples with abundant soil-derived DOM components. In addition, the proteinlike fluorescence property was more ronounced in the samples where strong algal or microbial activities were expected. It was also shown that the ratio of protein- ike/terrestrial humic-like fluorescence obtained from synchronous spectrum and fluorescence EEM could be used as an indicator for the evaluation of wastewater treatment on the downstream water quality of rivers and for the prediction of the degree of algal/microbial activities in lakes. It is expected that the results of this study will provide the basic information to develop the future water quality management techniques using DOM fluorescence measurements. 형광측정법은 자연유기물질을 간편하고 신속하게 분석함으로써 타 분석법에 비해 현장에서 실시간으로 수질관리에 활용할 수 있는 월등한 장점을 가지고 있다. 본 연구에서는 표준자연유기물질, 호소수 및 하천수 등 다양한 시료의 형광지표(F450/F500),synchronous 스펙트럼, 형광 EEM(excitation emission matrix)을 조사하고 시료 간 상호비교를 통해 자체생성/외부생성 유기물, 단백질계, 펄빅산계, 휴믹산계, 육질성 휴믹산계 형광특성 영역을 구분하였다. 또한 각 영역간의 형광세기 비를 이용하여 다양한 유기물 성분의 상대적인 분포를 파악하였다. 각 시료에서 얻어진 형광특성 및 형광세기 비는 시료의 수질 특징에서 예상되는 결과와 잘 일치하였다. 자연유기물의 생성지가 육지성일수록 외부생성 유기물 및 육질성 휴믹산계 형광특징이 더 크게 나타났고 하수 처리수의 영향을 받거나 조류 및 미생물 활동이 활발한 지점에서는 단백질계 형광특성이 뚜렷하게 나타났다. 특히, synchronous 형광스펙트럼이나 형광 EEM에서 얻어지는 단백질계/육질성 휴믹산계 형광세기 비는 도심지 하천의 경우 하수종말처리장 방류수 영향을 평가하는 지표로, 또한 호수의 경우 조류 및 미생물 활동 정도를 예측하는 지시자로서 사용될 수 있음을 보여 주었다. 본 연구는 현장시료를 사용한 자연유기물질 형광분석법 및 그 해석에 대한 기초자료를 제시하였으며 이 연구결과는 향후 유기물 성분분포 파악이 필요한 수질관리 분야에서 유용하게 사용될 수 있을 것으로 기대한다.

      • KCI등재

        풍지혈 소염약침을 병행시술한 안면경련환자 10례에 대한 임상고찰

        허진,이은경,김정호,김영일,Heo, Jin,Lee, Eun-Kyoung,Kim, Jung-Ho,Kim, Young-Il 대한약침학회 2010 Journal of pharmacopuncture Vol.13 No.2

        Objectives : The main purpose of this research is to evaluate the effect of treatment with Soyeom Pharmacupuncture at G20(Punji) for ten patients with hemifacial spasm. Methods : We have treated them with acupuncture treatment and Soyeom Pharmacupuncture at G20(Pungji), and evaluated the effect by Scott's scale. Results: After treatment, the grades of spasm intensity classified by Scott's description were improved in 9 cases. Conclusion : This data suggested that Soyeom Pharmacupuncture at G20(Pungji) for hemifacial spasm was effective and will be attempted to the patients wi1h it.

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