• The Korean Journal of Pesticide Science
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• v.14 no.4
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• pp.421-426
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• 2010

Many bacterial strains inhabit strong saline condition, such as tidal mudflat and salted seafoods, were identified and reported for the proposed protease activities and salt resistance; however antifungal activities against plant fungal pathogen have not well been studied until now. In this study, primary screening was performed for the isolation of promising strains against major plant pathogens like Sclerotinia sclerotiorum, Fusarium oxysporum, Phytophthora capsici, Botrytis cineria, Collectotrichum acutatum and Pythium ultimum. Totally 423 bacterial strain were isolated from laboratory media which was based on different morphological characteristics and all the strains were dual cultured against major fungal pathogens on PDA, finally 40 strains were selected as antifungal bacterial strain and identified by fatty acid phylogenic difference analysis from MIDI shorlock gas chromatography system. As a result, antifungal strains from tidal mudflat were 10 species of 6 genus. Paenibacillus macerans was dominant species; 5 strains among the 17 isolates from tidal mudflat. Antifungal strains from salted seafoods were 7 species of 3 genus and Bacillus atrophaeus was dominant species; 12 strains among the 23 isolates from salted fishes.

• The Journal of Internal Korean Medicine
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• v.31 no.4
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• pp.892-900
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• 2010

Objectives : To save the lives of patients with cardiac arrests, CPR must be performed rapidly and precisely. Regarding its critical necessity, there is a growing tendency to encourage whomever witnesses the cardiac arrest to perform basic CPR. However, the attitude toward basic CPR nor its current state of education in Korean Oriental Medical arena, which is one of the dual axes unique to Korean medical system, are not known. This is a kind of pilot study to research attitudes toward and the educative effect of basic CPR among oriental medical doctors in Korea. Methods : We carried out surveys and tests targeting nineteen apprentice doctors working in Dongguk University Ilsan Oriental Hospital, who were receiving training for 'AHA BLS course for healthcare providers', on the attitude toward and educative effect of basic CPR before and after the education. Results : The pre-educational survey showed that most of the participants felt the necessity to be trained in the BLS course, were not confident about performing CPR, and not well-acquainted with the whole process of performing CPR. After education, however, none of them responded with a lack of confidence to perform basic CPR, and the score of the confidence to perform basic CPR was significantly increased, too (from $2.05{\pm}0.71$ to $4.05{\pm}0.40$, n=19, p<0.001). Moreover, all of them answered they were satisfied with this BLS course, and it aroused their sense of responsibility as oriental medical doctors. All the participants passed the exam, and their average score for BLS scheme performance was $28.2{\pm}1.3$. Conclusions : It is necessary, in the future, to set up a management system for intensive, regular and continuous reeducation and expand the research on the perception and attitude targeting larger numbers and more multilevel groups of oriental medical doctors.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.1
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• pp.282-290
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• 2015

This study is intended to look into parents' satisfaction of contracting-out system in employer-supported childcare centers. To achieve this, a survey was carried out to 400 parents who use national, public and private employer-supported childcare centers. The results were as follows. First, employer-supported childcare factors were the qualities of childcare environment, childcare program and early childhood teacher in both contracted-out and in-house services. The satisfaction with facility, program, operation and childcare training was improved in good employer-supported childcare factors And the satisfaction with the relationship between these factors could improve the expectation for the use of employer-supported childcare centers. Second, the difference in the operation of employer-supported childcare centers showed that the most preferred size was 50 to 74 children. The contracted-out services was more preferred than in-house services. And the location of on-the-job facility was more preferred than off-the-job facility. As stated above, the preference of employer-supported childcare centers was more raised than that of general kindergartens or childcare centers by an increase in the trend of working child parents' dual income. In other words, small and medium sized childcare centers of some 50 children were more preferred than large scaled childcare centers. Consequently, the retainment of childcare programs, facilities and quality teachers contracted out to professional childcare centers can improve the satisfaction with them.

• Tunnel and Underground Space
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• v.28 no.3
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• pp.258-276
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• 2018

The accurate and quantitative ground information on the hydraulic conductivity characteristics of rock mass is one of the key factors for evaluation of the hydro-geological behaviour of rock mass around an excavated opening under high water pressure. For tunnel and rock structures in seabed, where the sea acts as an infinite source of water, its importance become greater with increasing construction depth below sea level. In this study, to improve the problems related with poor system configuration and incorrect data acquisition of previous hydraulic packer testing equipment, we newly developed an integrated main frame and 30 bar level waterproof downhole sonde apparatus, which were optimized for deep hydraulic packer test in seabed rock mass. Integration of individual test equipment into one frame allows safe and efficient field testing work on a narrow offshore drilling platform. For the integrated type main frame, it is possible to make precise stepwise control of downhole net injection pressure at intervals of $2.0kg_f/cm^2$ or less with dual hydraulic oil volume controller. To ensure the system performance and the operational stability of the prototype mainframe and downhole sonde apparatus, the field feasibility tests were completed in two research boreholes, and using the developed apparatus, the REV(Representative Elementary Volume) scale deep hydraulic packer tests were successfully carried out at a borehole located in the basalt region, Jeju. In this paper, the characteristics of the new testing apparatus are briefly introduced and also some results from the laboratory and in-situ performance tests are shown.

• Journal of the Korean association of regional geographers
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• v.9 no.4
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• pp.505-518
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• 2003

The purpose of this paper is to review Post-Fordist urban economic theories that have tackled the recent changes of urban economies in large cities in the world since 1980s, so that we can conceptualise the changes of urban economies in Korean cities. In the perspective of the Post-Fordist urban economic theories, the recent changes of urban economies in the world are deeply related to the transformation of capitalist world economic system from Fordism to Post-Fordism. To see these changes which can be called as the new urbanization process in the economic aspect, we will focus especially such theories as new industrial space (district) theory based on the flexible specialization paradigm, informational city theory based on the information and communication mode paradigm, and cluster and regional innovation theory based on the institution and network paradigm. Also we will consider the social polarization process and dual city phenomena that have been observed for the most part of big cities in the world.

• Korea journal of population studies
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• v.23 no.2
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• pp.5-37
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• 2000

In this paper we have reviewed major theories of international migration by three phases of migration : initiation, perpetuation, and adjustment. Through the review it is found that factors affecting the three phases are not mutually exclusive but interrelated, and argued that for a comprehensive understanding of the phenomena we need a theoretical guideline useful to locate all the important factors associated to the entire process of migration. Neoclassical economic theory which has played a leading role in migration research. fails to be such a guideline. since it is grounded on the unrealistic assumption of rationality and does not take into account for historical-structural factors, as neo-Marxian theorists have claimed. Two major Marxian theories, dual labor market theory and world system theory, have been successful to identify macro-structural factors that induce main flows of international migration, but do not so in exploring situational factors affecting the process of migration, especially social and cultural factors. Accordingly this study proposes that in order to grasp international migration process comprehensively we need to research the phenomena in view of action system theory, that is, to study migrants\` economic, political, social, and cultural situations inclusively.

• Journal of the Korean Society for Library and Information Science
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• v.30 no.2
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• pp.3-50
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• 1996

At present, Korean universities and colleges are confronted with a strong challenge, within and without, demanding a drastic change or innovation of university education. Discussion on the propulsion of the School Program is now under way as one of the means to reform the university education With such a background in mind, we have considered what should be the desirable course of Library and Information Science in Korea. We have considered the characteristic features and roles of library and information professionals to cope with the now approaching information society and the changing conditons of educational environment We have collected the pros and cons among professors of tile School Program, and investigated the curricula of the three universities which are at present practicing the School Program. Of the 139 professors to whom we have sent the questionnaries, $92(66\%)$ responded, of which the pros were 42 and the cons were 45. The model plan for the School Program is 'departmental school program' $(44\%)$, which purports to adopt 'departmental school program', with the curricula and material resources being utilized in common, or to adopt joint-appointment system with the common utilization of teaching materials and the introduction of a limited dual major system. The argument against introduction the School Program was that because of the peculiar nature of the discipline itself, Library and Information Science can not be merged with any other discipline.

• The Korean Journal of Malacology
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• v.20 no.2
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• pp.165-169
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• 2004

The BLAST server for the mollusk was constructed on the basis of the Intel Server Platform SC-5250 dual Xeon 2.8 GHz cpu and Linux operating system. After establishing the operating system, we installed NCBI (National Center for Biotechnology Information) WebBLAST package after web server configuration for cgi (common gate interface) (http://chimp.kribb.re.kr/mollusks). To build up the stand alone blast, we conducted as follows: First, we downloaded the genome information (mitochondria genome information), DNA sequences, amino acid sequences related with mollusk available at NCBI. Second, it was translated into the multifasta format that was stored as database by using the formatdb program provided by NCBI. Finally, the cgi was used for the Stand Alone Blast server. In addition, we have added the vector, Escherichia coli, and repeat sequences into the server to confirm a potential contamination. Finally, primer3 program is also installed for the users to design the primer. The stand alone BLAST gave us several advantages: (1) we can get only the data that agree with the nucleotide sequence directly related with the mollusks when we are searching BLAST; (2) it will be very convenient to confirm contamination when we made the cDNA or genomic library from mollusks; (3) Compared to the current NSBI, we can quickly get the BLAST results on the mollusks sequence information.

• Weed & Turfgrass Science
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• v.2 no.3
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• pp.221-229
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• 2013

This paper reviews current status of weed control practices in herbicide-resistant crops to examine weed management strategies in cope with cropping herbicide-resistant crops in the near future. Herbicide-resistant crops were rapidly adopted weed management technologies due to broad-spectrum weed control without crop injury. Transgenic glyphosate-resistant cultivars in soybean, corn, canola, and cotton were adopted to manage weeds at lower cost in a simplified weed management system. Dual stack crops with glyphosate and glufosinate resistance were developed to control glyphosate resistant weeds in corn, soybean and cotton. New multiple herbicide-resistant crops with resistance to glyphosate and glufosinate, acetolactate synthase (ALS) inhibitors, synthetic auxin herbicides, 4-hydroxyphenyl pyruvate dioxygenase (HPPD) inhibitors or acetyl Coenzyme A carboxylase (ACCase) inhibitors will expended the utility of existing herbicide technologies to manage the evolution of resistant weeds. However, herbicide resistant crops alone cannot solve weed problems and thus studies on diverse weed managements using an array of alternating herbicides of mode of action, mechanical, and cultural practices are needed for integrated weed management systems in the future.

• Analytical Science and Technology
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• v.14 no.3
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• pp.274-285
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• 2001

In this study, the thermal desorption-cryofocusing-gas chromatographic(TD-C-GC) method was developed for determination of volatile organic compounds(VOCs) in ambient air and was applied at the municipal solid waste landfill sites. On-column cryofocusing was possible only with a 100 ml dewars bottle in TD-C-GC method with a stainless steel column. However, high operating pressure was needed for purging VOCs from the absorbent trap, which was able to solve by pressure programming with a electric pressure controller. By using both pressure and temperature programming brought increasing of resolution power in on-column cryofocusing method, but the high pressure caused a leakage of sample tube with repeated use. A loop cryofocusing devise was also developed and compared with the direct on-column method. In loop cryofocusing method, VOCs were concentrated on a 0.8mm i.d. loop which is located between the injector and separation column by using liquid nitrogen. In order to purge VOCs from the absorbent trap, only 0.4 psi of pressure was need in the loop cryofocusing method. Dual detection system was applied for the analysis of VOCs; a FID was used for hydrocarbons and a FPD was used for sulfur-containing compounds. Qualitative analysis was done by on-column cryofocusing GC-MS system. Among the large number of VOCs, toluene was the most abundant. Hydrogen sulfide, dimethyl sulfide, carbon disulfide, dimethyl disulfide and methyl propyl disulfide were detected at landfill site by FPD.