• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.10
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• pp.88-96
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• 2017

The construction standards in Korea consist of design standards and specifications. They are provided by the national transportation electronic information center in file format, not in a DB, which may lead to their incomplete utilization and versatility, such as a lack of history management and reference functions. This also makes it difficult to cross-refer to standards and manage revision history. In this study, we developed a code management system for the national construction standards by analyzing domestic and overseas related systems, in order to pinpoint the problems in the current system and its development direction and, thus, to suggest a detailed plan for the design and implementation of a code management system. The developed system comprises four subsystems, namely a construction standards making system, construction standards service system, construction standards maintenance system and construction standards portal system. The results of this study are expected to improve the user's convenience by facilitating the revision, operation and history management of the complex and various construction standards, and to provide high-quality national construction standards by effectively supporting the revision and operation of the national construction standards with minimum duplication and conflicts.

• Restorative Dentistry and Endodontics
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• v.15 no.2
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• pp.46-57
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• 1990

The purpose of this study was to spectrophotometrically investigate the sealing effect of the ultrasonic canal obturation with softened gutta-percha utilizing an endosonic plugger by means of ultrasonic vibrations and heat. The 120 extracted human central and lateral incisors with single root were randomly selected, and the root canals were instrumented up to size #60 file by conventional method. The prepared canals were obtruated with gutta-percha by lateral condensation method, McSpadden technique and ultrasonic condensation method, with or without sealer. All specimens were immersed in 2% methylene blue in an incubator at $37^{\circ}C$ for 10 days. The teeth were then dissolved in 5ml of 60% nitric acid solution and the dye present within the root canal system was returned to solution. The leakage of dye was quantitatively measured via spectrophotometric method. The obtained data statistically evaluated usint two-way ANOVA and Student's t-test. The results were as follows : No statistically significant difference in leakage was observed between the lateral condensation method and ultrasonic condensation method, with and without sealer. When sealer was used or not, McSpadden technique showed significantly greater leakage than lateral or ultrasonic condensation method. Statistical analysis of the data indicated that the canals obturated in conjunction with sealer demonstrated less dye leakage than the canals obturated without sealer(p<0.01), except McSpadden technique. The ultrasonic condensation method appeared comparable sealing ability to the lateral condensation method.

• Health Policy and Management
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• v.6 no.1
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• pp.163-190
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• 1996

본 논문은 미국 농촌병원의 경영전략과 관련하여 몇가지 가설을 검증한 연구결과이다. 구체적으로 1987년부터 1991년 사이의 미국 농촌병원들의 기본적 경영전략 지향 형태와 변화 추세, 경영전략과 환경 및 병원특성과의 관계, 그리고 경영전략과 재정적 성과의 관계 등이 연구되었다. 본 연구의 자료수집은 미국 농촌지역의 모든 종교병원과 영리병원, 그리고 무작위 표본추출로 뽑힌 50%의 공공병원 및 기타 비영리 병원의 최고경영자를 대상으로 1989년에 우편설문조사를 통해 이루어졌으며 회수된 설문지 중 사용가능한 640개 병원 (응답율 43%)의 자료가 분석 이용되었다. 조사대상병원의 환경적 특성자료는 지역자원 파일(Area Resource File)에서 수집하였고, 병원특성 및 재정적 성과자료는 미국병원협회 연감(Annual Survey of Hospitals)에서 구하였다. 응답병원과 비응답병원간에 환경 및 병원특성에 유의한 차이는 없는 것으로 나타났다. 본 연구에서는 Miles와 Snow가 개발한 방어형(defender), 분석형(analyzer), 진보형(prospector), 반응형(reactor)의 네가지 경영전략지향 형태를 사용하여 분석하였다. 본 연구의 결과를 요약하면 다음과 같다. 1) 미국 농촌 병원들은 과거에는 방어형 및 분석형의 경영전략 지향을 보이다가 점차 반응형과 진보형으로 변화해 가고 있다. 2) 가장 뚜렷한 경영전략 지향의 변화추세는 방어형이 급격히 줄고 반응형이 크게 늘어나고 있다는 점이다. 이는 많은 병원들이 급격한 환경변화에 적응하기 위해 일관된 전략 지향보다 융통성 있고 탈력적인 경영전략을 선호하고 있음을 나타낸다. 3) 농촌병원들은 경영전략의 급격한 변화를 추구하지는 않을 것이라는 가설을 뒷받침할 근거는 없는 것으로 나타났다. 이는 급격한 의료환경의 변화로 인해 병원들이 다양한 경영전략의 변화를 모새하고 있는 것으로 볼 수 있다. 4) 대부분의 외부환경 및 병원특성은 병원의 전략지향의 선택에 큰 영향을 미치지 않는 것으로 나타났으나 인구 10,000명당 의사수, 병상규모, 위탁경영 여부, 병상점유율, 소유형태 등의 변수들이 경영전략 지향 형태에 따라 유의한 차이가 있는 것으로 나타났다. 5) 경영전략 지향이 상이한 병원들은 세부 실천전략에 있어서도 치이가 있을 것이라는 가설을 일부 전략에 있어서 사실인 것으로 나타났다. 즉 방어형 병원들은 진보형이나 반응형 병원들보다 내부관리전략, 다양화 전략, 의사유치전략, 직원복지전략 등에 있어서 소극적인 것으로 나타났다. 6) 비록 방어형 병원들이 다른 형태의 병원보다 낮은 재정적 성과를 보이고 있었지만 본 연구의 자료로는 경영전략지향과 재정적 성과간의 인과관계를 구명할 수 없었다. 또한 재정적성과에 따른 전략지향의 변화여부도 통계적으로 유의한 관계가 있지는 않은 것으로 나타났다. 이는 각각의 전략지향들이 환경에 따라 나름대로 장점을 가질 수 있으며 반드시 어느 한가지의 전략지향만이 최선은 아님을 시사해주고 있다. 7) 병원의 경영전략 변화는 환경의 변화와 더블어 그러한 변화에 적응할 수 있는 내부의 능력과도 관계가 있는 것으로 보인다. 이상의 연구결과에 따르면 미국의 농촌병원들은 급격한 환경변화에 적응하기 위하여 다수의 병원들이 환경 및 벼원특성에 관계없이 생존을 위한 전략적 노력을 기울이고 있음을 알 수 있다. 끝으로 이러한 연구결과는 최근 어려운 경영환경에 처한 한국의 농촌병원들도 합리적인 경영을 위해서는 병원이 처한 외부환경분석과 함께 내부의 능력에 적합한 경영전략의 방향을 설정하고 그에 따른 실천적 세부 경영전략을 수립해야만 한다는 것을 시사해 주고 있다.

• Journal of the Korean Society for Library and Information Science
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• v.6
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• pp.137-163
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• 1979

The Purpose of this study is analyzed that (l) How the public Libraries under the Japanese Rule since the end of the Yi-Dynasty were recepted and generated by the people and (2) How they were organiged and managed. (3) Also it examined that how they affected the development of the libraries of today. 1. The following are the analyzed results: Three types of the public Libraries under the Japanese Rule for a period of 36 years engaged busily in colonization were Private's Public Libraries, Local Self-Government's Libraries and the Central Governmental Libraries, and were in order established. 2. They were eatablished by individuals, Confucian School Foundation, Young Men's Clubs, School Associations, Korean brethren residing abroad, or The Press Centering around the Local Self-Governments and the Japanese Government-General. 3. In 1932 of the period of the Japanese Rule, the number of Libraies gained the summit and reached 80 Libraries. The Public Libraries including the Central Governmental Libraries remained in existence until the end of the War had been kept up the functions of the Libraries, but the Private Libraries operated by the Koreans were very small and poor. As a result, most of them were closed up and some Libraries transferred their controls to the public. Until the end of the war, only a little over 10 Private Libraries were Kept up. From the aspects of it's organization system, the most of their libraries replaced their chief librarians with non-professional county-headmen or Local supporters. From the aspect of collections, they wate mainly consists of Japanese books for the proper quidance of the public thought based on the ideology of Japanese Rule to Korea and on the industrial promotion rather than books about Koreanology or Western books. At that time, the Library users were with the jobless men and students as the central figures. And the next ranking by the social position of readers was children, farmers, merchants, industrialists, public servants, miscellaneous and educators. Their reading tendencies laid stress on linguistics and literature, physical sciences and medicine, While the reading trend of military sciences and medicine, while the reading trend of military sciences and engineering were very inactive. This was because the Japanese Government-General had not kept the military collections on file. Besides, they were reluctant to make Korean's learn the professional knowledge and so the main reference materials of technology not provited. Most of the Libraries put practiced in circulation services were very important circulation in withinder of the reading room rather than in outside of the Library building. On the other hand, their circulation services has above came with many limitations. As stated above, the public Libraries' managements and activitives under the period of Japanese Rule were the way and means to achive the colonial and imperialistic purpose of the Japanese Empire.

• Journal of the Korea Organic Resources Recycling Association
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• v.2 no.1
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• pp.31-40
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• 1994

In the later part of 1980's, a great emphasis has been placed on the treatment issues of livestock wastes due to the continuous increase in consumption of livestock and meat products. Continued economic development for three decades has enhanced the nationally general level of life for the purpose of exit out of absolute poverty, thus accompanied with people's demand for a quality of environment beyond the traditional economic factors over times. Such an individual or collective demand for environment of life has been primarily focussed and argued on only rural environment in the early development periods. In perspective of clean water supply and security for urban area, however, it is more important to treat livestock wastes in the oriented-sustainable environment than in the conventional ways without working on environment degradation. Livestock wastes composed of the high-concentrated organic matter ought to be controlled and treated in sound ways, if not, which on one hand may result in pollution of underground water, surface water and a nasty smell, and on the other hand also may cause people to file a civil petition. Therefore on the research paper, reviewing occurrence of livestock waste and situation of treatment in details, through scrutinizing the government regulation and financing or subsidizing for it, author intends to find out the initiative of 'resourcefication' of treating of livestock wastes in the environmental soundness and efficiency

• Journal of the Korean Society of Food Science and Nutrition
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• v.15 no.1
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• pp.56-62
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• 1986

Marine fishes, sardine(Sardinops melanosticta), scad kingfish(Caranx equula), horse mackerel(Trachurus japonicus) and file fish(Navodon modestus), were stored for fifty days with partial freezing at$-3.5^{\circ}C$. During the storage, the changes in microflora and volatile nitrogen content was investigated. The fishes exhibited $10^4\;to\;10^6$ of bacterial cells per square centimeter of their skin just before they were submitted to the storage. The bacterial cell number was increased as $10^6\;to\;10^8$ cells as the storage time passed over twenty-two days. Offensive odor which is typical in the spoilage of fishes became strong as increase the bacterial cell numbe. The major isolates among the three hundred strains of bacteria isolated from the fish skins were identified as Pseudomonas I/II, III/IV-H, Vibrio and Moraxella. The same was found in the spoiled fishes, however, Pseudomonas I/II, was predominant on contrast to that of fresh fishes. Pseudomonas III/IV-NH, Flavobacterium, Cytophaga and Micrococcus were also found in early period of storage, but they disappeared as the progress of storage. Nine per cent of isolates were unidentified.

• KOMUNHWA
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• no.70
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• pp.89-108
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• 2007

Stamped-Roof Tiles, the characteristics of Baekje Tiles are one of the most frequently excavated tiles in Iksan. Considering the types and amount of excavation of the Stamped-Roof Tiles unearthed in Iksan area, it seems that these are closely related with a Royal family. The tiles might be manufactured by a particular gorup of file maker since they are produced with same way. Referring the Ganji carved in the Stamped-Roof Tiles, I suppose that the tiles were produced and used in two time periods, the time around enthronement of The King Mu and the second quarter of the 7th century around Gichuk, AD. 629. In addition, Convex Tiles used in Wanggung-ri Site and Mireuk Site was also produced in same time as the Stamped-Roof Tiles, considering there pattern and the amount of excavation. The social background of tile production was analogized based on the technology and the time of the tile manufacture as well as the characteristics of the Stamped-Roof Tiles which represent the Obu and the Ohang. The production of the tiles was supported by Obu which aided the King Mu-oriented construction project the economic capacity of the Royal family was not enough to promote. The tile production system was totally controled by the Royal family and the inspector, neither producer nor donator, examined the quantitation of the tiles and generated the imprint of a seal with the Stamped-Roof Tiles.

• Transactions of the Korean Society of Mechanical Engineers B
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• v.40 no.7
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• pp.441-448
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• 2016

The thrust force created by a propeller depends on the incoming flow velocity and the rotational velocity of the propeller. The performance of the propeller can be described by dimensionless variables, advanced ratio, thrust coefficient, and power coefficient. This study included the application of the immersed boundary lattice Boltzmann method (IBLBM) with the stereo lithography (STL) file of the rotating object for performance analysis. The immersed boundary method included the addition of the external force term to the LB equation defined by the velocity difference between the lattice points of the propeller and the grid points in the domain. The flow by rotating a 4-blade propeller was simulated with various Reynolds numbers (Re) (including 100, 500 and 1000), with advanced ratios in the range of 0.2~1.4 to verify the suggested method. The typical tendency of the thrust efficiency of the propeller was obtained from the simulation results of different advanced ratios. It was also necessary to keep the maximum mesh size ratio of the propeller surface to a grid size below 3. Additionally, a sufficient length of the downstream region in the domain was maintained to ensure the numerical stability of the higher Re and advanced ratio flow.

• Journal of KIISE:Databases
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• v.28 no.3
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• pp.494-511
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• 2001

In the environment that database management systems manage disk spaces for storing databases directly, this paper proposes a correct and efficient scheme of performing pending actions for the removal of database files. As for performing pending actions, upon performing recovery, the recovery process must identify unperformed pending actions of not-yet-terminated transactions and then perform those actions completely. Making the recovery process identify those actions through the analysis of log records in the log file is the basic idea of this paper. This scheme, as an extension of the execution of transactions, fuzzy checkpoint, and recovery of ARIES, uses the following methods: First, to identify not-yet-terminated transactions during recovery, transactions perform pending actions after writing 'pa_start'log records that signify both the commit of transactions and the start of executing pending actions, and then write 'eng'log records. Second, to restore pending-actions-lists of not-yet-terminated transactions during recovery, each transaction records its pending-actions-list in 'pa_start'log record and the checkpoint process records pending-actions-lists of transactions that are decided to be committed in 'end_chkpt'log record. Third, to identify the next pending action to perform during recovery, whenever a page is updated during the execution of pending actions, transactions record the information that identifies the next pending action to perform in the log record that has the redo information against the page.

• Journal of Information Management
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• v.43 no.1
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• pp.63-87
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• 2012

This study aims to analyse the actual condition of the ebook services and propose the improvements of ebook services for children in the Korean public library. For this purpose, the current condition of the ebook services in the public libraries were analyzed and categorized by three criteria. Secondly, the ebook use analysis was conducted using PCs and mobile devices in terms of access to ebook library site, searching method, contents type and viewer, lending process, and user help. As a result of the analysis, several issues such as the difficulty in access to ebook site, the complexity of setting and usage depending on the file format, the insufficient user guide, the relatively lower quality service than the commercial's, and the lack of retrieval functions specialized for the ebook were presented. The improvement plan for the ebook services, especially for children in the public library was suggested.