• Journal of Information Management
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• v.39 no.2
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• pp.163-184
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• 2008

This research provides an empirical analysis of the academic libraries' operating performance in Seoul, Korea. This study aims to find the key variables and the impacts of each variables on the operating performance of the academic library to attain competitiveness and long-term conditions for enhancing customer satisfaction. Specifically, this research focuses on the library's circulation service performance. The author try to analyze the relationship between the characteristics of the library (space, number of employees, number of books, budget) and the circulation performance. Korea Libraries Association have published yearly-book on the Korean library's circumstances and statistics. Yearly-book contains the data about the spaces, number of books, number of workers, the library's budget scales and other unique elements. This study finds that the circulation performance of books is positively related with the size of physical space, number of books holdings, and budgets (hypothesis 1, 3 and 4 accepted). This study demonstrate that the characteristic elements of academic library can be influential factor of the library performance.

• Journal of the Korean Crystal Growth and Crystal Technology
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• v.14 no.6
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• pp.257-261
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• 2004

The pottery stones from the Taebek area consist of abundant quartz with kaolinite. In this study, the characteristics of pottery stones were examined by XRD (X-ray diffractometer), XRF (X-ray fluorescence spectrometer), TG-DTA and SEM (Scanning Electron Microscope). The chemical compositions of the raw ore showed 71.75 wt%$SiO_2$, 22.10 wt%$Al_2O_3$, 1.86 wt%CaO, 2.97 wt%$K_2O$, 0.62 wt%$Fe_2O_3$. When pottery stone of 3 mm size was leached at $80^{\circ}C$ with 10 % oxalic acid, the content of $Fe_2O_3$ was reduced from 0.62 wt% to 0.24 wt% and the whiteness was enhanced. Grinding of pottery stone was conducted by a planetary ball mill using media of zirconia, the average particle size was 2～5 $\mu\textrm{m}$.

• Journal of Microbiology and Biotechnology
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• v.14 no.6
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• pp.1232-1238
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• 2004

To investigate the production and characteristics of thermostable levan sucrase from Rahnella aquatilis ATCC 33071, the levan sucrase gene from R. aquatilis was cloned and expressed in Escherichia coli without induction system. Expression of levansucrase gene in E. coli had no notable or detrimental effect on the growth of host strain, and the recombinant levan sucrase exhibited levan synthesis activity. Levansucrase was secreted to the periplasm in E. coli, and addition of $0.5\%$ glycine yielded further secretion of levansucrase to the growth medium and resulted in an increase of total levansucrase activity. Furthermore, the cellular levansucrase was evaluated for the production of levan by using toluene­permeabilized whole-cells. The levansucrase was thermostable at $37^{\circ}C$. The molecular size oflevan was $1{\times}\;10^{6}$ Da, as determined by HPLC, and the degree of polymerization of levan varied with incubation temperatures: Low incubation temperature was preferable for the production of high-molecular size levan. The present study demonstrated that the mass production of levan and levan oligosaccharides can be achieved by glycine supplementation to the growth medium or by toluene­permeabilized whole-cells.

• Journal of Intelligence and Information Systems
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• v.10 no.1
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• pp.27-45
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• 2004

While on-line shopping is increasing, the "Consumer Protection Law in Electronic Commerce" obliges each internet shopping mall to provide its business information. Although most internet shopping malls provide their business information in the semi-structured format on the bottom of their homepages, the attributes and expression forms of business information are different each other. It makes consumers difficult to identify their business information and lowers public confidence. Hence this study proposes three approaches - HTML-based structure, XML-based structure, and XML data island-based structure - to structuralizing business information for correct expression. The experiment results showed that the business information extraction time by XML data island-based structure is independent of the size of the web document, while the time by HTML-based structure is dependent on the size. By comparing the business information extraction times, we show that XML data island-based structure is more efficient and effective than HTML-based structure.structure.

• The Journal of Korean Medicine
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• v.25 no.1
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• pp.161-171
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• 2004

Objectives: Sasang Constitutional Medicine is popularly appliedto treatment in Korea. Constitution is a holistic concept contained internal and external characteristics, and physical traits including ordinary symptoms. Skin is one of constitutional property elements. So we researched a correlation female facial skin and sasang constitution. This is a basic study to find constitution can be a major factor to care and manage skin. Methods: We examined sasang constitution and facial skin condition of 100 healthy women who aged from 30 to 59. Hydration and sebum of facial skin was measured by skin diagnostic instrument and skin type was calculated from the data. Keratin, pore size, acne, and brightness of face was measured by skin magnifying lens and subjective skin troubles in ordinary times was also investigated. Constitution diagnosis and Skin diagnosis was investigated separately as a blind test andthe data was statistically analyzed with chi-square test, Correlation analysis, One-way analysis of variance. Results: 1. In sasang constitution, Taeeumingroup bad significant tendencies of larger hydration and sebum amount, combination degree of forehead and cheek was also higher than other constitutions(p<0.05). 2. Facial skin type was significantly different according to Sasang Constitution, Soeumin and Soyangin had a tendency of dry skin comparatively, but Taeeumin had mainly a tendency of combination skin and secondly dry skin(p<0.05). On the other hand, there was no correlation between age and skin type. 3. In subjective skin trouble, Soeumin group had less acne trouble than Soyangin and Taeeumin group(p<0.1). Pore size trouble was more frequent in Soyangin group than Soeumin group(p<0.05). Keratin trouble was more frequent in Soeumin group than Soyangin and Taeumin group(p<0.1). Conclusions: Korean healthy women's skin condition was different according to sasang constitution.

• Journal of Korea Technology Innovation Society
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• v.14 no.4
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• pp.791-812
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• 2011

The aim of this paper is to address the factors that influence R&D performance of the Korea Institute of Science and Technology (KIST), the representative government-supported research institute in Korea, through an empirical case study. Using the KIST R&D project data from 2004 to 2008, we investigate the determinants of R&D performance through a logistic regression analysis, and compare the results with the survey data we collected from researchers. Our results indicate that total budget, high rate of temporary researchers, and the outcome of the research director's past publications affect publishing performance, while the size of equipment, materials expenditure, and whether the research is outsourced or not affect patent registration performance and technology transfer performance. Contrary to expectations, major factors of publishing performance and that of patent performance are different respectively, and even the results of the survey data we collected from researchers show the difference. Accordingly, the findings of our study suggest the need for research institutes to consider facilitating communication with researchers and enhancing research policy analysis for improving R&D performance.

• The Plant Pathology Journal
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• v.20 no.4
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• pp.240-243
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• 2004

White rot on Allium crops recently had a high incidence with incrensed cultivating areas of tropical garlic types in Korea. Two types of Sclerotium have known as causal agents that produce different size and shapes of sclerotia in infested fields. Therefore, we developed a new method for isolation of sclerotia from infested field soils that can be used for ecological study of Sclerotium spp. and establishment of control strategy. Soil samples collected from heavily infested fields were evenly mixed and placed on a automatic sieve shaker connected with tap water, After 10 min of shaking, residues on 0.5 mm and 0.25 mm sieves were separately collected and suspended with 70% sugar solution, which method floats sclerotia in aqueous layer, Then, floated fraction was carefully separated and mixed with a same volume of 1% sodium hypochlorite solution to differentiate with organic materials. This method provides a direct count of sclerotia under a dissecting microscopy.

• Ocean and Polar Research
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• v.26 no.2
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• pp.311-321
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• 2004

Relationships between sedimentary environments and abundance of benthic animals were examined on the deep-sea floor, the Clarion-Clipperton Fracture Zone, in the northeast equatorial Pacific Ocean. Specimens were collected using a box corer at 8 stations by sieving through 0.3 mm mesh screen. Sediments showed finer grain size ranged from 5.63 to $7.97{\varphi}$, 83.1% of mean porosity, 1.81 kPa of mean shear strength and organic carbon content in sediment ranged from 0.97 to $1.87\;mg/cm^3$. Manganese nodules covered on the bottom layer from 4 to 57% of coverages. A total of 26 faunal groups in 6 phyla was sampled and comprised 1,467 individuals. Mean biomass were calibrated to 0.5 gWWt/$0.06\;m^2$. Small-sized animals including foraminiferans and nematods were dominated among the faunal group which comprised 49.1% (892 ind.) and 11.5% (320 ind.), respectively. In SPI-analysis, vertical bio-disturbance marks were not observed except to Beggiatoa-type bacterial mats. As the results of relationship between environments and benthos, abundance of benthic animals, especially nematode, showed only a negative correlation to the coverage of nodules, and any other sedimentary factors analyzed in this study were rarely affected to the spatial distribution of benthic animals.

• Korean Journal of Materials Research
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• v.14 no.12
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• pp.876-884
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• 2004

This study was to investigate whether the bioactivity of the anodized and hydrothermally treated Ti-6Al-7Nb alloy were affected by the time of hydrothermal treatment. Anodizing was performed at current density 30 $mA/cm^2$ up to 300 V in electrolyte solutions containing $DL-{\alpha}-glycerophosphate$ disodium salt hydrate $(DL-{\alpha}-GP)$ and calcium acetate (CA). Hydrothermal treatment was done at $300^{\circ}C$ for 30 min, 1 hr, 2 hrs, and 4 hrs to produce a thin film layer of hydroxyapatite (HA). The bioactivity was evaluated from HA formation on the surfaces in a Hanks' solution with pH 7.4 at $36.5^{\circ}C$ for 10, 20, and 30 days. Anodic oxide films were porous with pore size of $1\sim4{\mu}m\;and\;3\sim4{\mu}m$ thickness. The anodic oxide films composed with strong anatase peak with presence of rutile peak, and showed the increase in intensity of anatase peak after hydrothermal treatment. It was shown that the intensity of anatase peak increased with increasing the time of hydrothermal treatment but was no difference in rutile peak. The corrosion voltage was the highest in the group of hydrothermal treatment for 2 hrs (Ecorr: -338.6 mV). The bioactivity in Hank's solution was accelerated with increasing the time of hydrothermal treatment.

• The KIPS Transactions:PartD
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• v.11D no.4
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• pp.747-754
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• 2004

Database administrators should be aware of performance characteristics of database systems in order to manage database system effectively. The usages of system resources in database systems could be quite different under database workloads. The objective of this paper is to identify and analyze performance characteristics of database systems in different workloads, which could help database tuners tune database systems Under the TPC-C and TPC-W workloads, which represent typical workloads of online transaction processing and electronic commerce respectively, we investigated usage types of resource that are determined by fourteen performance indicator, and are behaved in response to changes of four tuning parameters (data buffer, private memory, I/O process, shared memory). Eight out of the fourteen performance indicators cleary show the performance differences under the workloads. Changes of data buffer parameter give a influences to database system. The tuning parameter that affects the system performance significantly is the database buffer size in the both workloads.