• The Journal of Korean Institute of Communications and Information Sciences
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• v.39B no.1
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• pp.1-7
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• 2014

This paper proposes an efficient test wrapper design that reduces overall test time in multi-core SoC. After initial local wrapper solution sets for all the cores are determined using well-known Combine algorithm, proposed algorithm selects a dominant core which consumes the longest test time in multi-core SoC. Then, the wrapper characteristics in the number of TAM wires and the test time for other cores are adjusted based on test time of the dominant core. For some specific cores, the number of TAM wires can be reduced by increasing its test time for design space exploration purposes. These modified wrapper characteristics are added to the previous wrapper solution set. By expanding previous local wrapper solution set to global wrapper solution set, overall test time for Multi-core SoC can be reduced by an efficient test scheduler. Effectiveness of the proposed wrapper is verified on ITC'02 benchmark circuits using $B^*$-tree based test scheduler. Our experimental results show that the test time is reduced by an average of 4.7% when compared to that of employing previous wrappers.

• Proceedings of the Korea Society of Information Technology Applications Conference
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• 2002.11a
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• pp.336-339
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• 2002

WWW의 확산과 함께 온라인 쇼핑몰 사용자들에게 상품 정보를 수집하고 제공하는 비교 쇼핑 에이전트들의 필요성도 증가하고 있다. 그러나, 웹사이트들은 대부분 그들 자신의 데이터 표현 포맷을 가지므로, 각 웹사이트별로 다른 wrapper가 작성되어야 한다. Wrapper는 특정한 포맷으로 쓰여진 웹페이지들로부터 정보를 추출하는 특수 목적의 프로그램이다. 본 논문에서는 효율적인 wrapper 작성을 위해서 주어진 URL로부터 자동적으로 wrapper를 생성하는데 사용되는 핵심 정보를 추출하는 에이전트를 제안한다.

• Proceedings of the Korea Society for Industrial Systems Conference
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• 2002.11a
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• pp.336-339
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• 2002

WWW의 확산과 함께 온라인 쇼핑몰 사용자들에게 상품 정보를 수집하고 제공하는 비교 쇼핑 에이전트들의 필요성도 증가하고 있다. 그러나, 웹사이트들은 대부분 그들 자신의 데이터 표현 포맷을 가지므로, 각 웹사이트별로 다른 wrapper가 작성되어야 한다. Wrapper는 특정한 포맷으로 쓰여진 웹페이지들로부터 정보를 추출하는 특수 목적의 프로그램이다. 본 논문에서는 효율적인 wrapper 작성을 위해서 주어진 URL로부터 자동적으로 wrapper를 생성하는데 사용되는 핵심 정보를 추출하는 에이전트를 제안한다.

• Journal of KIISE:Software and Applications
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• v.29 no.1_2
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• pp.42-52
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• 2002

Information extraction(IE) is a process of recognizing and fetching particular information fragments from a document. In previous work, most IE systems generate the extraction rules called the wrappers manually, and although this manual wrapper generation may achieve more correct extraction, it reveals some problems in flexibility, extensibility, and efficiency. Some other researches that employ automatic ways of generating wrappers are also experiencing difficulties in acquiring and representing useful domain knowledge and in coping with the structural heterogeneity among different information sources, and as a result, the real-world information sources with complex document structures could not be correctly analyzed. In order to resolve these problems, this paper presents an agent-based information extraction system named XTROS that exploits the domain knowledge to learn from documents in a semi-structured information source. This system generates a wrapper for each information source automatically and performs information extraction and information integration by applying this wrapper to the corresponding source. In XTROS, both the domain knowledge and the wrapper are represented as XML-type documents. The wrapper generation algorithm first recognizes the meaning of each logical line of a sample document by using the domain knowledge, and then finds the most frequent pattern from the sequence of semantic representations of the logical lines. Eventually, the location and the structure of this pattern represented by an XML document becomes the wrapper. By testing XTROS on several real-estate information sites, we claim that it creates the correct wrappers for most Web sources and consequently facilitates effective information extraction and integration for heterogeneous and complex information sources.

• Journal of KIISE:Computer Systems and Theory
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• v.31 no.3_4
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• pp.160-169
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• 2004

With an emergence of SOC from developed IC technology, the VLSI design has required the core re-use technique and modular test development. To minimize the cost of testing SOC, an efficient method is required to optimize the test time and area overhead in conjunction for the core test wrapper, which is one of the important elements for SOC test architecture. In this paper, we propose an efficient design strategy of core test wrapper to achieve the minimum cost for SOC testing. The proposed strategy adopted advantages of traditional methods and more developed to be successfully used in practice.

• Proceedings of the IEEK Conference
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• 2005.11a
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• pp.869-872
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• 2005

In this paper we present a switch wrapper for an AMBA AXI, which is an efficient on-chip-network interface compared to bus-based interfaces in a multiprocessor SoC. The AXI uses an idea of NoC to provide the increasing demands on communication bandwidth within a single chip. A switch wrapper for AXI is located between a interconnection network and two IPs connecting them together. It carries out a mode of routing to interconnection network and executes protocol conversions to provide compatibility in IP reuse. A switch wrapper consists of a direct router, AHB-AXI converters, interface modules and a controller modules. We propose the design of a all-in-one type switch wrapper.

• Journal of Biosystems Engineering
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• v.27 no.3
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• pp.195-202
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• 2002

In order to make a winter cereal wrap silage, a tractor attached round bale wrapper was developed locally. Its specific structure and various functions were reported in the last submitted paper. In this study a control system of bale wrapper combining with the actuators of various processes was developed to make round bale wrapper compatible in the field. Also. its performance was tested by making the rye round bale. The results can be summarized as fellow. 1. The field capacity of round bale wrapping was investigated around 0.5 ha/hr, and the operating time of bale wrapper was about 3 min for each 500kg round bale 2. Plastic film which has maximum elongation rate of 796% was stretched to 150∼170% of original length and was lessened to 80∼90% of original width. 3. In the quality test of bale produced by developed bale wrapper, there was no significant changes of moisture contents if it was wrapped more than 4 layers of 25 ㎛-plastic film. 4. Also. temperature of the wrapped bale was about 33$\^{C}$ in the beginning of fermentation and was stabled to 26∼29$\^{C}$ during one month or more storage. Therefore, wrapping performance of the developed bale wrapper was properly.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.10 no.6
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• pp.1191-1195
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• 2009

We present the efficient test wrapper design methodology considering the layout distance of scan chain. To test the scan chains in SoC, the scan chains must be assigned to external TAM(Test Access Mechanism) lines. The scan chains in IP were placed and routed without any timing violation at normal mode. However, in test mode, the scan chains have the additional layout distance after TAM line assignment, which can cause the timing violation of flip-flops in scan chains. This paper proposes a new test wrapper design considering layout distance of scan chains with timing violation free.

• Journal of KIISE:Software and Applications
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• v.28 no.2
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• pp.179-191
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• 2001

Comparison shopping is a merchant brokering process that finds the best price for the desired product from several Web-based online stores. To get a scalable comparison shopper, we need an agent that automatically constructs a simple information extraction procedure, called a wrapper, for each semi-structured store. Automatic construction of wrappers for HTML-based Web stores is difficult because HTML only defines how information is to be displayed, not what it means, and different stores employ different ways of manipulating customer queries and different presentation formats for displaying product descriptions. Wrapper induction has been suggested as a promising strategy for overcoming this heterogeneity. However, previous scalable comparison-shoppers such as ShopBot rely on a strong bias in the product descriptions, and as a result, many stores that do not confirm to this bias were unable to be recognized. This paper proposes a more scalable comparison-shopping agent named MORPHEUS. MORPHEUS presents a simple but robust inductive learning algorithm that antomatically constructs wrappers. The main idea of the proposed algorithm is to recognize the position and the structure of a product description unit by finding the most frequent pattern from the sequence of logical line information in output HTML pages. MORPHEUS successfully constructs correct wtappers for most stores by weakening a bias assumed in previous systems. It also tolerates some noises that might be present in production descriptions such as missing attributes. MORPHEUS generates the wrappers rapidly by excluding the pre-processing phase of removing redundant fragments in a page such as a header, a tailer, and advertisements. Eventually, MORPHEUS provides a framework from which a customized comparison-shopping agent can be organized for a user by facilitating the dynamic addition of new stores.

• Proceedings of the Korea Multimedia Society Conference
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• 2001.06a
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• pp.338-341
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• 2001

인터넷 환경에서 이 기종 데이터베이스의 통합은 중요한 연구 과제 중의 하나로서, 그를 위한 자료저장소 Wrapper에 대한 관심이 높아지고 있다. 한편, XML은 이 기종 시스템들간에 효과적으로 데이터를 교환하는 도구로서 최근 맡은 DBMS들이 XML을 지원하고 있다. 그러나 그들은 각기 자신의 데이터 모델만을 지원하기 때문에 상호 호환성이 떨어진다. 본 논문은 인터넷 환경에서 분산된 이질의 데이터베이스들을 효과적으로 통합할 수 있도록 일관된 변환 모들을 사용하여 데이터 모델에 독립적으로 동작할 수 있는 XML 기반의 범용 Wrapper를 제안한다.