• Convergence Security Journal
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• v.15 no.5
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• pp.61-70
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• 2015

North Korea invaded South Korea on June 25, 1950 and the armistice agreement was reached on July 27, 1953. After that, there have been about 5,000 provocations large and small. In particular, North Korea attacked a naval vessel called "Cheonanham" on March 26, 2010. After the attack, Korean government announced the sanctions against North Korea, so called "May 24 sanctions". North Korea bombarded Yeonpyeong provocation on November 23, 2010 and they planted wood box mines in the DMZ on August 4, 2015. The explosion of them resulted in injuring two Korean soldiers. In response to this accident, Korean government resumed loudspeaker broadcasting against North Korea in 11 years which had developed as the psychological warfare. After this, North Korea declared "being a state of war" and intensified tension. Suddenly North Korea suggested talks and two countries reached an agreement through inter-Korean high-level contacts. But we should review whether the agreement was reached with ease and in haste. This paper focuses on the North Korea's negotiating tactics and suggests our corresponding directions for the future.

• The Research Journal of the Costume Culture
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• v.22 no.1
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• pp.16-27
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• 2014

This study investigated the characteristics of and changes in hemp textile production practices at Gurye in Jeollanam-do in modern times. To do this, in this study, both a literature review and fieldwork research were utilized as research methods. The literature review focused on Gurye's hemp data, and the fieldwork research involved two separate trials. Male and Female residents of Gurye who had experience in the area of hemp production from the 1920s to the 1980s participated in this study. The results were as follows. First, regarding hemp fiber cultivation in Gurye, hemp cultivation continued to the 1970s and there were no changes in hemp cultivation practices during the Japanese colonial-era. Second, there have been very important changes in hemp kilns over time. In the 1950s, there were both single-body kilns and separate-body kilns in Gurye. Later, specifically in the 1950s, a new type of kiln using an iron pot appeared, and the most modern kilns were concrete structures. Third, in Gurye, women cooperatively removed hemp husks immediately after stemming, subsequently bleaching the hemp by soaking it in lye or caustic soda. Over time, there have been changes in ash types and in soaking periods. Fourth, loom types changed from the traditional Korean back-strap loom to the treadle loom in the 1930s- to 1940s. Fifth, since the 1970s, the hemp textile output levels of Gurye have been reduced due to the westernization of clothing styles, the inflow of Chinese hemp fiber and government regulations pertaining to hemp cultivation.

• Korean Journal of Biological Psychiatry
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• v.27 no.2
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• pp.37-41
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• 2020

Modified electroconvulsive therapy (ECT) which started in 1950s is a safe and efficacious treatment for several mental disorders including mood disorders and psychotic disorders. However, its usage in present days is still limited by misconceptions and stigmata of ECT. This paper overviews the background from which the stigmata of ECT stemmed and the current status of stigmata surrounding ECT among the public and medical professionals. In addition, a few potential strategies for reducing stigmata of ECT are provided in this review.

• Journal of agricultural medicine and community health
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• v.15 no.1
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• pp.21-27
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• 1990

During the last half a century the Korean rural society have experienced drastic changes : the retreat of Japan from the colonial interference and suppression in 1945, the Korean war and disorder in the 1950s, the implementation of the first and second five-year economic development plans in the 1960s, the ambitious implementation of the new village movement called Saemaul Undong to modernize the traditionally stagnant rural village in the 1970s, and socioeconomic and political turmoil in the 1980s. In this complex process of change the rural health care system in Korea was grdually reformed. This paper reviews the socioeconomic change and the basis of the changing structure of the health care system in rural Korea, on the basis of the existing literature and secondary data. Thus this is not a research paper but a review article in its nature. After reviewing the past and present situation, the directions and strategies for the reformation of the rural health care system are suggested.

• Animal Systematics, Evolution and Diversity
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• v.34 no.3
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• pp.143-151
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• 2018

A marine ciliate Amphisiella milnei (Kahl, 1932) $Horv{\acute{a}}th$, 1950 was discovered from the tidal pool of Baekdo Island, South Korea. The existence of extra cirri between leftmost frontal cirrus and buccal cirrus discriminates this species from its congeners. Its morphological features are described as follows: body size in vivo $110-130{\times}35-45{\mu}m$; elongate rectangular to elliptical in shape; two large and several small ring-shaped structures; yellowish cortical granules arranged irregularly on ventral side but longitudinally along dorsal kineties on dorsal side; 34-40 adoral membranelles, 3 frontal cirri, 1 buccal cirrus, 1 parabuccal cirrus, usually 2 extra cirri behind leftmost frontal cirrus, and 3 frontoventral cirri; amphisiellid median cirral row composed of 25-31 cirri with 27-36 left and 27-44 right marginal cirri; usually 5 transverse cirri and 2 pretransverse cirri with 7 dorsal kineties; two macronuclear nodules. In addition to, 18S rDNA sequence of A. milnei was analyzed to understand its phylogenetic relationship.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.27 no.4
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• pp.110-116
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• 2004

ABC analysis is the process of dividing inventory items into three classes according to their monetary usage so that managers can focus on items that have the highest monetary usage value, and has been widely used in practice since its development in 1950. However, the original criterion, monetary usage value, can no longer be the only rational criterion. Applying Analytic Hierarchy Process, we develop a new method to classify inventory items by considering such operationally/strategically important criteria as annual dollar usage, lead time, supplier's capacity, defective rate, difficulty of purchasing and unit price. A case study is performed applying the method to the field data from a company which produces electrochemical products.

• Journal of architectural history
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• v.27 no.2
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• pp.51-62
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• 2018

This study examines the site and erection of the Government Complex Seoul which was a project attempted to assemble dispersed government buildings in a certain place. The study focuses on the fact that the project is situated between the 1960s' making of capital Seoul and Seoul urban planning, and the way how the project achieved symbolism in capital Seoul. The project, one of the 1960s' Major Government Buildings, led both plan of capital Seoul and transforming city Seoul. The 1960s' Major Government Building Plan had identical drive with the 1950's Major Government Building Plan, however the 1960s' had additional layer: Seoul urban planning. After restoration of the Capital building, Sejongro the capital street was planned to the site arranging government offices. The Government Complex Seoul was set to be a modern building on a site with historical context according to the plan. Because of the site, the Government Complex Seoul was constructed in aware of other buildings that represented a competitive high-rise atmosphere in the late 1960s, including the Capital building nearby. PAE International's plan was completed through a series of design modification, and it boasted a vertical aspect, unlike the horizontal-looking plan that was already won after the design competition. The Government Complex Seoul tried to acquire the symbolism in the central space of the capital Seoul and high-rised city Seoul. "The new construction method" was a requirement to achieve the height.

• Journal of Life Science
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• v.33 no.10
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• pp.767-775
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• 2023

Sulfasalazine is a disease-modifying antirheumatic abiotic agent. It is a derivative of aminosalicylic acid and has been used for the treatment of various inflammatory diseases, such as rheumatoid arthritis, ulcerative colitis, and Crohn's disease, since it was first synthesized in 1941 and approved as a medicine in the United States in 1950. However, its mechanism of action has not yet been clearly identified. In this study, the effects of sulfasalazine on cell survival, apoptosis, and cell cycle progression in macrophages, which are major immune cells that regulate inflammatory responses, were investigated using mouse macrophage RAW 264.7 cells. Sulfasalazine inhibited the viability of RAW 264.7 cells in a dose-dependent manner, starting at a concentration of 0.25 mM. Annexin-V staining was used to confirm that the decrease in cell viability was due to apoptosis, and the number of Annexin-V-positive cells increased significantly at a concentration of 0.25 mM or higher. The effect of sulfasalazine on the expression of key proteins that regulate the G0/G1 phase of the cell cycle was also investigated. Sulfasalazine treatment significantly increased the expression of the cyclin-dependent kinase inhibitors p21 and p27 in RAW 264.7 cells. Although sulfasalazine is frequently used as a control drug in studies on inflammatory diseases, such as inflammatory colitis and rheumatoid arthritis, studies on its effect on macrophages are very limited. Therefore, the results of this study are expected to provide vital information on the use of sulfasalazine as a disease treatment.

• Journal of Korean Society of Transportation
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• v.24 no.3 s.89
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• pp.17-27
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• 2006

Car following model is a theory that examines changes of condition and interrelationship of acceleration deceleration. headway, velocity and so on closely based on the hypothesis that the Posterior vehicle always follows the preceding vehicle. Car following mode) which is one of the research fields of microscopic traffic flow was first introduced in 1950s and was in active progress in 1960s. However, due to the limitation of data gathering the research depression was prominent for quite a while and then soon was able to tune back on track with development in global positioning system using satellite and generalization of computer use. Recently, there has been many research studies using reception materials of global Positioning system(GPS). Introducing GPS technology to traffic has made real time tracking of a vehicle position possible. Position information is sequential in terms of time and simultaneous measurement of several vehicles in continuous driving is also practicable. Above research was focused on judging whether it is feasible to overcome the following model research by adopting the GPS reception device that was restrictively proceeded due to the limitation of data gathering. For practical judgment, we measured the accuracy and confidence level of the GPS reception devices material by carrying out a practical experiment. Car following model is also being applied in simulations of traffic flow analysis, but due to the difficulty of estimating parameters the basis of the above result. it is our goal to produce an accurate calibration of car following model's parameters that is suitable in this domestic actuality.

• Journal of architectural history
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• v.31 no.2
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• pp.27-34
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• 2022

This study aimed to elucidate the architectural characteristics of the cathedral architecture of the Archdiocese of Gwangju, which was completed in the period of liberation and turbulence, and the conclusions are as follows. Gwangju Archdiocese Cathedral, completed during the period of liberation and turbulence, was built with some assistance from the U.S. military or with the efforts of the faithful, and there are a number of factors such as space directing by Aps, the development of a simplified bell tower, the appearance of a stone cathedral, the application of a quenset structure, and an increase in size. show special features The indented apse appears only after liberation, and is a characteristic that appears prominently in stone churches. The simplified form in which the bell was hung by raising the outer wall appeared in the early church shows a change in the composition with a porch in front. The stone church and the quanset-structured church only appeared after liberation and were built only in the 1950s. The size of the cathedral reflects the increase in the number of believers after the Korean War, and the average area is about 1.5 times higher than before liberation. When considering the spacing of the bays as a module, the size plan followed the implicit norm of early cathedral architecture of 36.5m, but gradually decreased to 2.7m and 2.4m.