• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2004년도 춘계학술발표대회
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• pp.1379-1382
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• 2004

The use of a cache for storing and processing of Web objects is becoming larger. Also, many studies on the efficient management of the storing scope of caches are being done. Web caching algorithms have many differences from traditional algorithms. Particularly, heterogeneity of Web objects that are processing units of Web caching, and a variation of Web object reference characteristic with time are the important causes of the decrease the performance of existing algorithms. In this study, we proposed the new web-caching algorithm. A heterogeneity variation of an object can be reduced as the proposed method dividedly managing Web objects and a cache scope with heterogeneity, and it is adaptively reflecting a variation of object reference characteristics with the flowing of time. In the experiments, we verified that the performance of the proposed method was more improved than existing algorithms through the two experiment models which considered heterogeneity of an object.

• Journal of Biosystems Engineering
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• 제5권1호
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• pp.33-42
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• 1980

This study was carried out to investigate the actual environmental paddy storage conditions in conventional Korean farm warehouses. The paddy storage conditions by the locations and sizes of warehouses were figured out. The effectiveness of the small insulated box for storing paddy was also examined. Observations were made at sixteen different warehouses located in Moonsan-Myeon, Jinyandg-gun, Gyungnam Province from July lst to September 28 th, the period which was considered to be the worst for storing grains. The results are as follows ; 1. the average temperatures of rough rice and air inside the warehouse were 0.9 and 0.7$^\circ$ higher than the outside air temperature. 2. The average relative humidity in warehouses was 1.5percent higher than that of the atomosphere. This fact resulted in the increased moisture content of grains. Therefore, the ventilation for equalizing the relative humidity of inside and outside of warehouses was required. 3. The dry matter of stored rough rice was decreased by 1.1 percent in average druing the observation period. In order to reduce the dry matter loss, application of new grain storing method ;hermetic storage or filling inert gas storage, was highly recommended. 4. Environmental conditions for storing rough rice in a warehouse located in a sloping site are, in general , better than those of a warehouse located in a flat site. But as far as the dry matter of rough rice was concerned, above situation is not always satisfactory. Because it is fairly frequent to observe the higher rate of moisture absorption by grains stored in a warehouse located in a sloping site. 5. Environmental conditions for storing rough rice in a large-scale warehouse were better than those in a small size warehouse. Therefore, it is advisible for farmers to store their grins in the large-scale warehouses commonly used by villagers. 6. It was undesirable to store rough in a insulated box.

• 한국정보통신학회논문지
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• 제7권4호
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• pp.612-622
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• 2003

XML문서가 표준 인터넷 문서로 정착되어 감에 따라 XML문서의 효율적인 저장과 검색의 필요성이 증대하고 있다. 이에 본 논문에서는 XML문서의 효과적인 저장 모듈과 검색 모듈, 그리고 이를 웹 상에서 연동해서 사용할 수 있는 연동 API로 구성된 XML문서의 저장 및 검색 프레임워크에 대한 연구를 하였다. 저장모듈에서는 가변 K진 완전트리를 기반으로 한 DTD 독립적인 분할-통합형 저장모델을 구현하였고, 검색 모듈에서는 RDF 메타정보를 통해 구축된 색인에 대해 XPath 질의를 수행하는 XPath처리기를 구현함으로써 좀더 의미 있는 구조 검색 기능을 구현하였으며, XML-RPC, HTTP의 GET, POST, PUT 방식 API와 SOAP 방식의 API로 구성된 웹 연동 모듈을 구현하였다.

• 한국멀티미디어학회논문지
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• 제10권12호
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• pp.1539-1550
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• 2007

As XML is increasingly used for representing and exchanging data, relational database systems have been trying extend their features to handle XML documents XML documents can be stored in a column with XML data type like primitive types. The shredding method, which is one of the traditional methods for storing and managing XML documents in RDBMS, is still useful and viable although it has some drawbacks due to the structural discrepancy between XML and relational databases. This method may be suitable for data-centric XML documents with simple schema. This paper presents the extended version of the Association inlining method that is based on inlined shredding and compares the performance of querying processing to that of XML type method of conventional relational database systems. The experiments showed that in most cases our method resulted in better performance than the other method based on XML data type. This is due to the fact that our shredding method keeps and uses the order and path information of XML documents. The path table has the information of the corresponding table and column for each distinct path and the structure information of the XML document is extracted and stored in data tables.

• 대한기계학회논문집A
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• 제24권3호
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• pp.613-624
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• 2000

In this study, new design method of prosthetic foot was suggested which can evaluate the performance of prosthetic foot by implementing amputee's gait simulation using the finite element analysis. The basic shape of ESPF(Energy Storing Prosthetic Foot) was designed which is suitable for the below-knee amputee considering mechanical properties and kinematic properties. And, the performance evaluations were performed using the Taguchi method with orthogonal array L25. As a result, average main effect of factors for the ESPF's performance were calculated and then optimum condition of given shape was selected. Essential particulars for the performance evaluation from the simulation result were the quantity of external work needed in stance phase, the quantity of transferred energy from the ESPF through the knee, and the vertical displacement of knee at toe-off. Reasonable optimum condition was obtained from the using performance index. From this study, it was found that it is necessary for the design of ESPF to consider the geometrical data related to the magnitude of load on elastic material.

• 한국산학기술학회논문지
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• 제10권11호
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• pp.3207-3212
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• 2009

반도체 산업이 발전함에 따라 생산 효율을 높이기 위해 무인 자동 생산 공정이 요구되고 있다. 이러한 무인자동화 생산 관리 시스템은 생산성 향상을 위해 생산 공정에서 발생하는 대량의 실시간 데이터 분석 및 관리를 필요로 한다. 따라서 실시간으로 발생하는 대용량 데이터를 저장하기 위한 저장 관리 시스템이 요구된다. 기존의 저장 관리 시스템으로 오라클, MY-SQL, MS-SQL 등의 디스크 기반 DBMS가 있다. 하지만 기존의 디스크 기반 DBMS는 반도체 장비로부터 실시간으로 발생하는 대용량 데이터 처리에 한계가 있다. 본 논문에서는 대용량 데이터를 저비용으로 실시간 저장하기 위해 블록 단위 삽입 트랜잭션을 이용한 압축-합병 저장 기법을 제안한다. 제안 기법은 블록 단위 트랜잭션을 이용하여 실시간 데이터를 빠르게 저장하며 데이터를 압축하고 압축된 데이터를 합병하여 저장하기 때문에 보다 적은 디스크 공간을 사용하여 저장할 수 있다. 따라서 반도체 공정에서 빠르게 발생하는 대용량 데이터를 기존 DBMS보다 빠르게 저장이 가능하고 저장 공간 비용을 감소시킨다.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2005년도 Proceedings of ISRS 2005
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• pp.785-788
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• 2005

We design as well as implement MRTG++ enhanced by eliminating drawbacks of original MRTG. Existing MRTG makes it easy to monitor network resources on the web, and it can show some trend utilization about resources of remote systems. However MRTG has only functions showing statistical information data with daily/monthly/yearly characteristics in real-time, and periodically deletes stored data. Thus we improve log file-based storing method as an effectivelly storing method with database, propose expended MRTG++ retrieving as well as managing with measured data. It also can be applied in ubiquitous environment.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 1999년도 하계종합학술대회 논문집
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• pp.857-860
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• 1999

It is made possible a removal of the preamble for carrier recovery and symbol-timing recovery by storing a burst in memory with low overhead QPSK demodulation and this demodulation method also effects frame efficiency improved by processed synchronization performance. In this paper, we have proposed that new algorithm for arc-tangent look-up table which transform the input I, Q data by phase. This I, Q data plays an important role in demodulation and makes demodulator with low-overhead by storing a burst in memory. To evaluate proposed new algorithm and symbol-timing recovery method, function simulation and timing verification have been done by using synopsys VHDL tool.

• 한국지역사회생활과학회지
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• 제12권1호
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• pp.41-49
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• 2001

The purpose of this study was to investigate the preparation patterns of traditional fermented soybean products(jang) from the housewives living in Yangsan. 89.4% of the respondents used once a day, every meal and the frequency of eating was higher with getting older. 70% answered that the taste of their homemade doenjang was good, while only 2.5% were not be satisfied with their doenjang. According to the survey, 82.2% of the housewives used the meju made by the traditional method for jang preparation, of which perparation patterns showed remarkablely in the housewives living in the independent home. On the other hand, we could see that the amount of jang preparated one time in each home of Yangsan region was approximately 6∼10kg or 16∼20kg. The hard tasks of jang preparation were seasoning, storing and meju preparation. Especially, housewives living in the communal house had a difficulty in storing of jang. But most wants to continue to prepare jang by traditional method at home.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2000년도 하계종합학술대회 논문집(3)
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• pp.71-74
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• 2000

New methods for storing and retrieving semi-structured data such XML documents has been recently studied. In this paper, we concern querying of XML data stored in relational tables. We first describe a method of querying XML documents using Oracle XDK, especially XSQL Servlet. We then apply the method to XML documents describing book information.