• Journal of Korean Library and Information Science Society
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• v.23
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• pp.109-145
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• 1995

This study is to find out general problems a n.0, ppeared in the management and utilization of these and dissertation and to suggest some recommendations, through the survey and analysis on the Korean university libraries. Questionnaires were sent to 109 university libraries which offer master's and doctoral degrees, during the period between March 7 and March 27, 1995. Responded questionnaires of 91 libraries (about 83%) were processed using SAS. The results of this survey can be summarized as follows: 1. Most of Korean university libraries have the collections of theses and dissertations ranging from less than 10,000 volumes (27 libraries ; 32.1%) ; 10,000 to 30,000 volumes (20 libraries ; 25.0%) ; to more than 80,000 volumes (16 libraries ; 19.0%). The largest collection was around 200,000 volumes. 2. In the management of them, 35 libraries (38.5%) were active in collecting them, but 56 libraries (61.5%) were not active, mainly for the shortage of manpower and the space problems. In 62.6% of libraries, they are arranged with the books. And 51.3% of libraries process them in less than one month. 46 libraries (52.9%) computerize their system, and among them 40 libraries (87%) establish their own databases. 3. The collections of theses and dissertations are called by various name, including periodical room, theses room, reference reading room etc. reaching to 15 kinds. 71 libraries (78.0%) adopt open system, and 17 libraries closed system ; and 2 libraries (3.2%) partial open system. 62 libraries (68.1%) arrange them in the order of call number, while 20 libraries (31.9%) by other criteria.

• Journal of Integrative Natural Science
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• v.11 no.4
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• pp.192-196
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• 2018

The mobile agent paradigm can be exploited in a variety of ways, ranging from low-level system administration tasks to middle ware to user-level applications. Mobile agents can be useful in building middle-ware services such as active mail systems, distributed collaboration systems, etc. An active mail message is a program that interacts with its recipient using a multimedia interface, and adapts the interaction session based on the recipient's responses. The mobile agent paradigm is well suitable to this type of application, since it can carry a sender-defined session protocol along with the multimedia message. Mobile agent communication is possible via method invocation on virtual references. Agents can make synchronous, one-way, or future-reply type invocations. Multicasting is possible, since agents can be aggregated hierarchically into groups. A simple check-pointing facility has also been implemented. Another proposed solution is to use multi agent computer systems to access, filter, evaluate, and integrate this information. We will present the overall architectural framework, our agent design commitments, and agent architecture to enable the above characteristics. Besides, the each information needed a mobile agent system such as text, graphic, image, audio and video etc, constructed a great capacity multimedia database system. However, they have problems in establishing connections over multiple subnetworks, such as no end-to-end connections, transmission delay due to ATM address resolution, no QoS protocols. We propose a new connection management scheme in the thesis to improve the connection management involved of mobile agent systems.

• Journal of the Korean Society for Marine Environment & Energy
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• v.15 no.3
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• pp.219-226
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• 2012

The International Maritime Organization (IMO) adopted the International Convention for the Control and Management of Ships' Ballast Water and Sediments in 2004 to prevent the transfer of aquatic organisms via ballast water. Thirty-four ballast water treatment systems were granted IMO active substance basic approval, among which twenty systems were granted final approval. This paper is an in-depth consideration of the mechanism principles of the treatment systems that received active substance basic or final approval from IMO, and on the concentration of Total Residual Oxidant (TRO). The TRO maximum allowable discharge concentration was reduced by neutralization equipment, resulting with a concentration lower than 0.2 ppm. However, between various treatment systems TRO maximum allowable dosage showed large differences, ranging from 1 to 15 ppm. The discrepancies of treatment allowable dosage concentration between different treatment systems are largely due to the properties of species and water conditions such as the temperature and turbidity, rather than the characteristics of treatment systems and the type or presence of filters etc.

• Korean Journal of Veterinary Research
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• v.11 no.1
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• pp.59-63
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• 1971

Current interest in ${\gamma}$-aminobutyric acid (GABA) has arisen from the convergence of several independent line of investigation leading to the demonstration that this and related substances are normal products of brain metabolism and that GABA has an important physiological action upon brain function as well as upon certain peripheral nervous structures. The interest for neurophysiologists has been enhanced by the importance of the discovery for the role of humoral mediator of synaptic transmission or regulator of neuronal activity in the central nervous system, particularly if it may shed some elight upon the nature of central inhibitory processes. In accordance with such an interest and importance, this work was performed in order to standardize the normal content as a preliminary investigation of so-called night active and daytime active animals GABA content in their brains when they are exposed to light and darkness. The method, through which the estimation has made in this work, was paper chromatographic method developed by Maynert and Klingman for the estimation of GABA content in animal tissues. The results obtained are summerized as follows: 1) GABA content in the cerebral cortex of house rat ranged from 90 to $310{\mu}g/gm$ of wet weight. 2) The content of GAGA ranging from 130 to $510{\mu}g/gm$ of wet weight was occurred from midbrain of the rat. 3) GABA content was ranged from 30 to $150 {\mu}g/gm$ of wet weight of the rat cerebellum. 4) The contents of fowl cerebral cortex, midbrain, and cerebellum are estimated as ranging 230-590, 250-620, $50-280{\mu}g/gm$ of wet weight, respectively. As a result, it may be concluded that among three brain tissues of both animals the midbrain is the highest region in GABA content. Fowl brain, on the other side, contains more higher GABA content than the house rat brain does.

• Proceedings of the Earthquake Engineering Society of Korea Conference
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• 1998.10a
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• pp.335-342
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• 1998

A soil-structure interaction (SSI) experiment is being conducted in a seismically active region in Hualien, Taiwan. To obtain earthquake data for quantifying SSI effects and providing a basis to benchmark analysis methods, a 1/4-th scale cylindrical concrete containment model similar in shape to that of a nuclear power plant containment was constructed in the field where both the containment model and its surrounding soil, surface and sub-surface, are extensively instrumented to record earthquake data. In between September 1993 and May 1996, fifteen earthquakes with Richter magnitudes ranging from 4.2 to 6.2 were recorded. The recorded data were analyzed to provide information on the response characteristics of the Hualien soil-structure system, the SSI effects and the ground motion characteristics. The ground response data were analyzed for their variations with depth, with distance from the model structure, and at the same depths along downhole arrays. Variations of soil stiffness and soil-structure system frequencies were also evaluated against maximum ground motion. In addition, the site soil properties were derived based on correlation analysis of the recorded data and then correlated with those from the geotechnical investigation data.

• Journal of the Institute of Electronics and Information Engineers
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• v.51 no.8
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• pp.11-19
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• 2014

In recent SONAR (sound navigation and ranging) systems, wideband active SONAR systems has received more attention than narrowband SONAR systems due to the remarkable detection performance in terms of range resolution. However, the wideband SONAR systems usually requires a huge amount of computational burden in order to achieve their own superiority. To cope with this drawback of the wideband SONAR systems, this paper proposes a fast target detection and velocity estimation method using an extended replica in wideband hyperbolic frequency modulation active SONAR system. Computer simulation shows that the proposed method can be implemented by a highly reduced computational complexity with a little performance degradation in target detection and velocity estimation compared to the conventional filter bank method.

• Journal of Information Technology Applications and Management
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• v.17 no.4
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• pp.57-82
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• 2010

Many companies today use information systems to maintain competitive advantage and to give immediate responses to customer requests. Over time, however, many of these companies failed to make the most of such information systems because the users stopped utilizing the system. While many reasons offer explanations to the phenomenon, this study analyzes how usage intention of information system can be enhanced by changing the environment and usefulness of the system from the user's perspective. Active and wide-ranging researches using the Technology Acceptance Model (TAM) have been carried out on an individual's tendency to using new technology. But, many of the studies remain focused on improving user intention by enhancing the ease of use and usefulness of the system under PC applications or Enterprise applications. The personalized intranet system is not only bringing about sweeping changes to a company's information systems environment but also providing users with freedom to design their own working environment, personalization, to Corporate Information Systems (CIS). Results from empirical tests on intranet systems verify that through personalization, a more voluntary information system environment can be created and that by increasing the ease of use and usefulness of the system, users can become more favorable to accepting new technologies and ultimately result in improved usage intention. This study suggests personalization variables and model for implementing a voluntary CIS for information system developers.

• The Journal of the Acoustical Society of Korea
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• v.28 no.1
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• pp.10-18
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• 2009

A moving surface vessel generates a ship wake which contains a cloud of micro-bubbles with radii ranging between $8{\sim}200{\mu}m$. Such micro-bubbles can be detected by active sonar system for more than ten minutes depending on the size and speed of the surface vessel. In this paper, a reverberation model for the ship wake is presented. The developed model consists of the acoustic scattering model due to the distribution of the micro-bubbles and the kinematic model for the moving active sonar. The acoustic scattering model is based on the volume integration, where the volume scattering strengths are obtained from the spatial distribution of micro-bubbles. Since the directivity and look-direction of active sonar are important factors for moving active sonar, the kinematic model utilizes the Euler transformation to obtain the relative motion between the global and local coordinates. In order to verify the developed model, a series of sea experiment was executed in September 2007 to obtain the spatial-temporal distribution of a bubble cloud, and analyzed to be compared with the simulation results.

• Journal of Oral Medicine and Pain
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• v.6 no.1
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• pp.9-14
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• 1981

Maximal active movements of the mandible in the vertical and the horizontal plane were measured in 106 mem and 78 women. ranging from 20 to 29 years old, with a method devised by agerberg. The studied persons who were dental students of the School of Dentistry Seoul National University (SNU), nurses and dental auxiliaries of the SNU Hospital, had no pain or severe symptoms of dysfunction of the masticatory system. The obtained results were as follows : 1. The mean values for maximal opening and protrusion differed significantly between men and women, 55.9 mm and 49.7 mm, 9.3 mm and 7.4 mm respectively. 2. The means found for maximal lateral movement to the right and to the left were practically the same, 8.5 - 9 mm and did not differ with sex. 3. The lower limit of the normal range of horizontal movements may be regarded as 4 mm for men and 3 mm for women and maximal opening as 44 mm for men and 39 mm for women. 4. The maximal mandibular movement ranges of 20-year old person with 95 % probability were calculated and presented grphically.

• Journal of Korean Biological Nursing Science
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• v.22 no.4
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• pp.288-296
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• 2020

Purpose: The purpose of this descriptive study was to identify factors influencing pulmonary tuberculosis patients' self-care behaviors. Methods: The patients were 125 adults over the age of 19 who were diagnosed with pulmonary tuberculosis, receiving care at the National tuberculosis hospital. The survey questions measured family support, multidimensional scale of perceived social support (MSPSS), stigma and self-care behaviors. Results: The average score for self-care behaviors was 3.91, ranging from 2.22 to 5.00. There was a significant positive correlation between self-care behaviors and support system. There was a significant negative correlation between self-care behaviors and stigma. The significant variables influencing self-care behaviors were family support (β = .33, P< .001), smoking (β= -.23, p= .002), age (β= .22, p= .005) and experience of stopping treatment (β= -.17, p= .040). These factors explain 36% of pulmonary tuberculosis patients' self-care behaviors. Conclusion: Family support is very important to improve selfcare for tuberculosis patients. However, those in their fifties, men, and those who do not have a job and have underlying diseases have low family support, so they need active support at the national level. The study results suggest that a educational and nursing programs must be designed to reduce stigma and promote support system in order to enhance self-care behaviors.