• Journal of the Korean Wood Science and Technology
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• 제29권3호
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• pp.47-58
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• 2001

For finding both ways of recycling the wood and plastic wastes and solving the problem of free formaldehyde gas emission through manufacturing wood particle-polypropylene fiber composite board without addition of formaldehyde-based thermosetting resin adhesive, control particleboards and nonwoven web composite boards from wood particle and polypropylene fiber formulation of 50 : 50, 60 : 40, and 70 : 30 were manufactured at density levels of 0.5, 0.6, 0.7, and 0.8 g/$cm^3$, and were tested both in the physical and mechanical properties according to ASTM D 1037-93. In the physical properties, control particleboard had significantly higher moisture content than composite board. In composite board, moisture content decreased with the increase of target density only in the board with higher content of polypropylene fiber and also appeared to increase with the increase of wood particle content at a given target density. Control particleboard showed significantly greater water absorption than composite board and its water absorption decreased with the increase of target density. In composite board, water absorption decreased with the increase of target density at a given formulation but increased with the increase of wood particle content at a given target density. After 2 and 24 hours immersion, control particleboard was significantly higher in thickness swelling than composite board and its thickness swelling increased with the increase of target density. In composite board, thickness swelling did not vary significantly with the target density at a given formulation but its thickness swelling increased as wood particle content increased at a given target density. Static bending MOR and MOE under dry and wet conditions increased with the increase of target density at a given formulation of wood particle and polypropylene fiber. Especially, the MOR and MOE under wet condition were considerably larger in composite board than in control particleboard. In general, composite board showed superior bending strength properties to control particleboard, And the composite board made from wood particle and polypropylene fiber formulation of 50 : 50 at target density of 0.8 g/$cm^3$ exhibited the greatest bending strength properties. Though problems in uniform mixing and strong binding of wood particle with polypropylene fiber are unavoidable due to their extremely different shape and polarity, wood particle-polypropylene fiber composite boards with higher performance, as a potential substitute for the commercial particleboards, could be made just by controlling processing variables.

• Journal of Chest Surgery
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• 제47권5호
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• pp.437-443
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• 2014

The JCVSD (Japan Cardiovascular Surgery Database) was organized in 2000 to improve the quality of cardiovascular surgery in Japan. Web-based data harvesting on adult cardiac surgery was started (Japan Adult Cardiovascular Surgery Database, JACVSD) in 2001, and on congenital heart surgery (Japan Congenital Cardiovascular Surgery Database, JCCVSD) in 2008. Both databases grew to become national databases by the end of 2013. This was influenced by the success of the Society for Thoracic Surgeons' National Database, which contains comparable input items. In 2011, the Japanese Board of Cardiovascular Surgery announced that the JACVSD and JCCVSD data are to be used for board certification, which improved the quality of the first paperless and web-based board certification review undertaken in 2013. These changes led to a further step. In 2011, the National Clinical Database (NCD) was organized to investigate the feasibility of clinical databases in other medical fields, especially surgery. In the NCD, the board certification system of the Japan Surgical Society, the basic association of surgery was set as the first level in the hierarchy of specialties, and nine associations and six board certification systems were set at the second level as subspecialties. The NCD grew rapidly, and now covers 95% of total surgical procedures. The participating associations will release or have released risk models, and studies that use 'big data' from these databases have been published. The national databases have contributed to evidence-based medicine, to the accountability of medical professionals, and to quality assessment and quality improvement of surgery in Japan.

• 한국과학교육학회지
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• 제29권2호
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• pp.240-252
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• 2009

이 연구에서는 예비교사들의 수업 시연에 웹 기반 교육 체제를 도입하고, 구성주의 교사양성교육을 지원하는 방안으로서 웹 기반 교육 체제의 유용성을 확인하였다. 예비교사들은 수업 시연을 위하여 웹 기반 활동을 하였고, 수업 시연이 끝난 예비교사들을 대상으로 면담을 실시하였다. 예비교사들의 웹 기반 수업시연 과정을 분석한 결과를 토대로 웹 기반 교육 체제의 유용성을 세 가지 상황에서 살펴 볼 수 있었다. 첫째, 예비교사들은 수업 시연 전 구성주의 교수-학습이론에 관한 자료를 살펴보고 관련된 이론적 지식을 구성할 수 있었다. 이 때 웹 기반 교육 체제의 토론방은 예비교사들이 이론들에 대해 깊이 생각하고 탐색할 수 있는 환경을 지원해 줄 수 있었다. 둘째, 예비교사들은 수업 시연을 준비하는 과정에서 동료 예비교사들과 지도교수와의 상호작용을 경험할 수 있었다. 이와 같은 상호작용은 웹 기반 교육 체제의 토론방을 통해 지원되었으며, 예비교사들은 구성주의적 수업을 계획하고 구성하는 것과 관련된 실천적 지식을 형성 할 수 있었다. 셋째, 예비교사들은 수업 시연이 끝난 후 자신의 수업에 대한 평가를 하였다. 이 때 웹 기반 교육 체제가 제공하는 토론방은 예비교사들의 반성적 사고 과정을 위한 상호작용을 지원해 줄 수 있었다. 이 연구를 통해 웹 기반 교육 체제는 예비교사들이 구성주의적 교수-학습 방법들을 배울 수 있는 효과적인 환경을 제공해 줄 수 있음을 알 수 있었다.

• 소프트웨어공모대전
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• 통권4호
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• pp.156-170
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• 1999

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2009년도 춘계학술대회
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• pp.725-728
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• 2009

본 논문은 농촌이나 도심외곽의 대규모 비닐하우스 단지 등에서 비닐하우스 내부의 환경을 관리자가 직접 하우스 내부에 상주하지 않고도 자신의 컴퓨터에서 인터넷으로 접속하여 원격으로 감시하기 위한 시스템에 관한 것이다. 본 논문에서는 온도나 습도 등 비닐하우스 내부의 다양한 환경에 대한 모니터링이 가능한 원격 감시시스템을 테스트 모형을 사용해서 구현하고자 한다. 구현하고자 하는 테스트 모형은 계측용으로는 온도, 습도, 연기 및 적외선 센서를 사용하고, 제어용으로는 AC 220V 전구를 사용해서 USN 시스템 환경을 구현한다. 또한 윈도우용 모니터링 소프트웨어는 NI Labview를 사용해서 개발하고 DAQ 보드와 USN 제어보드를 연동해서 하우스 내부의 환경을 모니터링 할 수 있게 한다. 그리고 CCD 카메라 시스템과 이미지 Grab 보드를 연동해서 원격으로 하우스 내부를 실시간 감시할 수 있게 한다. 원격 접속용 컴퓨터 서버는 윈도우용 Apache 웹 서버와 PHP 및 MySQL ODBC를 연동해서 로컬에 구축하고, 사용자가 인터넷 웹브라우저를 사용해 서버에 접속하면 원격으로 하우스 내부의 환경을 모니터링이 가능하도록 인터넷 통신시스템을 구축한다.

• International journal of advanced smart convergence
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• 제10권4호
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• pp.22-29
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• 2021

For web application vulnerability diagnosis, from the development stage to the operation stage, it is possible to stably operate the web only when there is a policy that is commonly applied to each task through diagnosis of vulnerabilities, removal of vulnerabilities, and rapid recovery from web page damage. KISA presents 28 evaluation items for technical vulnerability analysis of major information and communication infrastructure. In this paper, we diagnose the vulnerabilities in the automobile goods shopping mall website and suggest security measures according to the vulnerabilities. As a result of diagnosing 28 items, major vulnerabilities were found in three items: cross-site scripting, cross-site request tampering, and insufficient session expiration. Cookie values were exposed on the bulletin board, and personal information was exposed in the parameter values related to passwords when personal information was edited. Also, since the session end time is not set, it was confirmed that session reuse is always possible. By suggesting security measures according to these vulnerabilities, the discovered security threats were eliminated, and it was possible to prevent breaches in web applications and secure the stability of web services.

• 정보처리학회논문지A
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• 제10A권5호
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• pp.503-512
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• 2003

최근 웹 기술이 급속하게 발달함에 따라 웹 기반의 많은 어플리케이션이 개발되고 있지만, 웹 어플리케이션의 개발 방법론 및 품질개선 속도는 이를 따르지 못하고 있다. 대부분의 웹 어플리케이션의 생성은 체계적인 개발 방법론 없이 개발자의 지식과 경험에 의존하여 개발되고 있다. 그러나 웹 기반의 응용시스템은 다양한 개발 기법이 필요하며 설계 및 개발 프로세스를 위해 풍부한 개발 방법론에 요구된다. 본 논문은 객체지향 개발 방법론을 지원하는 UML(Unified Modeling Language) 을 모바일 고객관리 시스템 설계 및 구현에 적용하였다. 즉, 웹 개발단계에서 필요한 스토리 보드와 요구사항 기술서를 바탕으로 모델링하는데 UML을 적용하였다. 그리고 본 논문에 적용된 개발 방법론을 통해서 산출된 컴포넌트들은 이와 유사한 웹 어플리케이션 개발 시에 필요한 컴포넌트로 재 사용될 수 있다. 이 시스템에 UML을 적용한 결과 효율적인 웹 어플리케이션의 분석 및 설계가 이루어진다.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2002년도 전력전자학술대회 논문집
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• pp.697-700
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• 2002

In this paper, we proposed the micro web-server Implementation on Strong ARM processor with embedded Linux. The parallel port connecting parallel I/O is controlled via HPPT protocol and web browser program. HTTP protocol is ported into Linux and the micro web server program and port control program are installed on-board memory using CGI to be accessed by web browser, such as Internet Explore and Netscape. 8bit LED and DIP switches are connected to the processor port and the switch input status is monitored and the LED output is controlled from remote hosts vie internet. The result of the proposed embedded micro-web server can be used in automation systems, remote distributed control via internet using web browser.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 하계학술대회 논문집 D
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• pp.2672-2674
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• 2003

In this paper, web based monitoring systems are implemented using embedded systems. A parallel port connecting parallel I/O is controlled via HTTP protocol and web browser program. HTTP protocol is ported into Linux. A micro web server program and port control program installed on-board memory using CGI to be accessed by web browser. Experimental results of proposed web based monitoring systems can be used in automation systems and remote distributed control systems via internet using web browser.

• 펄프종이기술
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• 제45권6호
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• pp.24-29
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• 2013

In this study, we investigated the applicability of PCC(precipitated calcium carbonate) as a raw material for the manufacture of duplex-board. Papers were made with white-ledger stock collected from the actual duplex-board mill and PCC in a laboratory, and paper properties including bulk, ash content, tensile strength, burst strength, brightness and opacity were measured. The effect of PCC on the drying energy of duplex-board was also determined by measuring the moisture content of wet web and calculating drying energy reduction. PCC increased bulk and ISO brightness significantly, which means PCC can decrease the use of virgin pulp and recycled fibers. PCC decreased the moisture content of wet web, which means PCC can decrease drying energy consumption. However, paper strength decreased as addition levels of PCC addition increased. Therefore, the addition level of PCC must be determined considering the reduction of paper strengths.