• International Journal of Contents
• /
• 제3권3호
• /
• pp.1-5
• /
• 2007

The main memory DBMS (MMDBMS) efficiently supports various database applications that require high performance since it employs main memory rather than disk as a primary storage. An index manager is an essential sub-component of a DBMS used to speed up the retrieval of objects from a large volume of a database in response to a certain search condition. Previous research efforts on indexing proposed various index structures. However, they hardly dealt with the practical issues occurred in implementing an index manager on a target DBMS. In this paper, we touch these issues and present our experiences in developing the index manager. The main issues are (1) compact representation of an index entry, (2) support of variable-length keys. (3) support of multiple-attribute keys, and (4) support of duplicated keys.

• 한국환경과학회지
• /
• 제4권1호
• /
• pp.1-12
• /
• 1995

The assessment for a degree of drought has been carried out based on the soil moisture index in Korea. The soil moisture index(Im) was calculated assuming of constant evapotranspiration until wilting point as Im = w2/wf $.$100. The soil moisture content(W2) at the final of a period is obtained from W2 : Pe + Wl - E, here the effective precipitation amount is Pe, evapotranspiration E, and the soil moisture content at the beginning of a period is Wl. The filed capacity(Wf), as a mean value of fine sandy loams, was reduced to 92 mm/ft when we accept the wilting point and the available soil moisture content of 42 mm/ft, respectively. The drought begins in Korea when the soil moisture index drops to less than 50%. The value coincides the isoline of 11 or more consecutive days without measureable precipitation. The soil moisture index frequently drops in the northern part of Youngnam area and Honam area so that both areas are well known as the areas of drought. Key word : Droughts, Soil Moisture Index.

• 국제강구조저널
• /
• 제18권5호
• /
• pp.1710-1722
• /
• 2018

Investigating remained damages from terrible earthquakes, it could be concluded that some events including explosion because of defect and failure in the building mechanical facilities or caused by gas leak, firing, aftershocks, etc., which are occurred during or a few time after the earthquake, will increase the effects of damages. In this paper, by introducing a complete risk analysis which included direct and indirect risks for earthquake (the main shock) and aftershock, the corresponding robustness index was created that called as "robustness index sequential critical events risk-based". One of the main properties of the intended robustness index is using progressive collapse percentage in its evaluation. Then, in a numerical example for a 4-storey moment resisting steel frame structure, a method is presented for obtaining all effective parameters in robustness index evaluation based on the intended risk and at last its results were reported.

• East Asian Economic Review
• /
• 제28권2호
• /
• pp.221-244
• /
• 2024

This study examines how the independence of monetary policy changes in situations where the interest rate differential between domestic and foreign rates inverts, utilizing the trilemma indices. For analysis, this paper uses the trilemma indices developed by Kim et al. (2017) to analyze the relationship between the monetary policy independence index and the other two trilemma indices, namely the capital account openness index and the exchange rate stability index, across 45 countries from 2002 to 2018. The analysis reveals that the trilemma's validity is contingent. In particular, no statistically significant negative correlation was found between the monetary policy independence index and exchange rate stability index during periods of interest rate differential inversion. A positive correlation emerges between exchange rate stability and the independence of monetary policy, particularly when the inverted interest rate differential exceeds a certain threshold. This situation, where the exchange rate remains stable despite low domestic interest rates, implies that the central bank is effectively managing monetary policy to appropriately respond to economic conditions, which is reflected in the monetary policy independence index.

• 한국도로학회논문집
• /
• 제12권1호
• /
• pp.55-59
• /
• 2010

높은 차량운행비용(VOC : Vehicle Operating Cost)은 포장도로 복구작업의 주요한 원인이고, 차량운행비용(VOC)은 연료소모량, 오일소모량, 부품교체비용 등으로 구성된다. 이중 연료소모량이 VOC에서 차지하는 비중이 높고, 다른 도로조건에 비해 도로 표면 거칠기가 도로의 노화 정도를 대표적으로 지시하는 값이기 때문에, 본 연구에서는 포장도로의 표면 거칠기(IRI : International Roughness Index) 변화에 따른 차량의 연료소모량 변화를 측정하였다. 차량의 연료분사 인젝터의 전압변화를 측정하여 연료소모량을 계산하였고, 속도는 GPS센서를 사용하여 측정하였다. 본 실험 결과를 이용하여 IRI 변화에 대한 연료소모량의 변화율을 계산할 수 있었다. 계산 결과, 40~100km/h 속도영역에서 중형 및 대형 승용차의 연료소모량(L/100km)은 3.5m/km 정도의 IRI 수준에서 IRI(m/lm) 증가율의 7배 정도로 증가하였고, 60km/h의 속도에서 가장 연비가 우수하였다.

• International Journal of Computer Science & Network Security
• /
• 제21권3호
• /
• pp.287-294
• /
• 2021

Modern small farms are important link components in the structure of the world agro-industrial complex. It ensures the food and nutritional sustainability of the country exclusively at the local regional level. The purpose of the research is to examine the role of farming in ensuring nutritional security and food stability based on the analysis of the Food Sustainability Index (FSI). Research methods: modeling, abstraction, analogy, analysis, synthesis, formalization, logical abstraction, theoretical cognition, systematization and classification, abstract-logical, etc. Results. Having analyzed the Food Sustainability Index for 2018, it has been established that there is a lack of a clear relationship between the pace of economic development and the level of food and nutritional sustainability. In addition, this study has identified the countries with the largest number of small farms, as well as the number of farms within the region. The correlation between the size of the farm and the area of agricultural land that it cultivates has been determined. The problems faced by small farms in the process of their activity have been analyzed. The programs implemented in the field of agro-industrial complex development by international profile institutions have been systematized. Particularly, the regional structure of agricultural development programs under the guidance of IFAD is defined, as well as the areas to which they are directed. Specific measures taken by governments to stimulate the development of small farms have been outlined. Reasonable conclusions have been formed based on the study. The direction of future research is seen in the assessment of the export potential of small farms in terms of range, volume of export deliveries and geographical direction of movement of their products.

• 만화애니메이션 연구
• /
• 통권26호
• /
• pp.131-156
• /
• 2012

글로벌시대에 이르러 축제에 대한 영역은 확장되어 하나의 관광콘텐츠로서의 역할 뿐 만 아니라, 나아가 도시의 이미지 및 정체성을 결정하는 요인으로서, 그 도시의 브랜드가치를 증진시키는 요인으로 주목받고 있다. 문화도시를 지향하는 부천시 또한 부천국제만화축제를 통해 도시의 활성화를 위한 문화자원으로 활용하고자 하고 있다. 이 연구는 부천국제 만화축제의 브랜드 자산 가치에 대한 평가지표모델을 개발하고, 개발된 평가지표모델을 통해 부천시민들의 축제에 대한 인식을 조사하는데 목적을 두고 있다. 이와 관련하여 이론적 배경을 고찰하고, 선행연구를 바탕으로 지표모델을 개발하였다. 이를 바탕으로 이 연구에서는 부천시민 1,000명을 대상으로 실시하였다. 축제 참관여부에 따라 두 집단으로 나누어 각 500명을 대상으로 설문조사를 실시하였다. 본 연구의 설문조사는 국제만화축제 평가지표모델을 인구학적 조사와 방문동기, 만화의 가치, 축제브랜드 인지도 및 연상이미지, 축제에 대한 지각된 품질 및 충성도, 축제의 국제성 및 도시 활성화 측면으로 나누는 등 9개의 평가범주를 설정하였다. 각 설문문항은 5점 척도로 구성하였다. 설문분석결과, 축제참관동기로는 '자녀 교육을 위해'가 가장 높았으며, 참관하지 않은 이유로 '축제정보를 알지 못해서'가 가장 높게 집계되었다. 만화의 가치 중 두 집단 모두 산업적 가치를 가장 높게 평가하였으며, 각 설문항목에 있어 축제 참관여부에 따라 축제에 대한 인식 격차가 있는 것으로 조사되었다. 부천국제만화축제 브랜드 인식은 '보통' 수준으로 나타났으며, '도시 활성화'지표와 '만화의 가치'지표가 상대적으로 높고, '축제의 국제성'지표가 가장 낮았다. 또한 개발된 평가지표모델의 구성범주마다 축제의 참관여부에 따른 인식의 차이가 다르게 나타났다. 이 연구에서는 이러한 분석결과를 종합하고, 시사점을 도출함으로써 향후 부천국제만화축제의 발전 전략을 수립하는 준거자료로 활용될 수 있도록 하였다.

• 한국치위생학회지
• /
• 제15권5호
• /
• pp.865-872
• /
• 2015

Objectives: The purpose of the study is to investigate the oral health characteristics of the multicultural international marriage women in Gimcheon, Gyeongbuk in Korea. Methods: The subjects were 73 multicultural international marriage women in Gimcheon, Gyeongbuk in Korea. The study methods consisted of direct interview with the subjects and oral examination through dental mirror and head lamp by one dentist and two dental hygienists. The questionnaire included the use of medical services, oral health education experience, subjective oral health awareness, toothbrushing, and sociodemographical characteristics of the subjects. Results: There were significant correlations between the subjective oral health awareness, oral health behavior and DMFT index. The subjective oral health awareness significantly changed after the international marriage in Korea. The recognition of subjective oral health status significantly improved after the oral health education by the dentist and the dental hygienist. Conclusions: The subjective oral health status of the international marriage women improved significantly after immigration into Korea. Therefore, Korean government should try to provide the better medical services to the international marriage women and protect their human rights as Korean immigrants on the basis of the Law.

• International Journal of Contents
• /
• 제3권2호
• /
• pp.6-17
• /
• 2007

Emerging modem database applications require multi-dimensional index structures to provide high performance for data retrieval. In order for a multi-dimensional index structure to be integrated into a commercial database system, efficient techniques that provide transactional access to data through this index structure are necessary. The techniques must support all degrees of isolation offered by the database system. Especially degree 3 isolation, called "no phantom read," protects search ranges from concurrent insertions and the rollbacks of deletions. In this paper, we propose a new phantom protection method for multi-dimensional index structures that uses a multi-level grid technique. The proposed mechanism is independent of the type of the multi-dimensional index structure, i.e., it can be applied to all types of index structures such as tree-based, file-based, and hash-based index structures. In addition, it has a low development cost and achieves high concurrency with a low lock overhead. It is shown through various experiments that the proposed method outperforms existing phantom protection methods for multi-dimensional index structures.

• International Journal of Knowledge Content Development & Technology
• /
• 제9권2호
• /
• pp.65-89
• /
• 2019

This study has the aim of developing an evaluation index that can help evaluate the reliability of the information resources of institutions retaining humanities assets for the purposes of laying out the foundation for providing one-stop portal service for humanities assets. To this end, the evaluation index was derived through the analysis of previous research, case studies, and interviews with experts, the derived evaluation index was then applied to the humanities assets retaining institutions to verify the utility. The institutional information resources' reliability evaluation index consisted of the two dimensions of the institutions' own reliability evaluation index. The institution provided a service and system evaluation index. The institutions' own reliability evaluation index consisted of 25 points for institutional authority, 25 points for data collection and construction, 30 points for data provision, and 20 points for appropriateness of data, for a total of 100 points, respectively. The institution provided service and system evaluation indexes consisting of 25 points for information quality, 15 points for appropriateness (decency), 15 points for accessibility, 20 points for tangibility, 15 points for form, and 10 points for cooperation, for the total of 100 points, respectively. The derived evaluation index was used to evaluate the utility of 6 institutions representing humanities assets through application. Consequently, the reliability of the information resources retained by the Research Information Service System (RISS) of the Korea Education & Research Information Service (KERIS) turned out to be the highest.