• Bulletin of the Korean Chemical Society
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• 제22권12호
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• pp.1350-1360
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• 2001

The synthesis and characterization of very stable Pd(Ⅱ) η1-imine complexes of bis(3,4-dialkyloxybenzylidene-3', 4'-dialkyloxyaniline)dichloropalladium(Ⅱ) with alkyl chain of hexyl (8), octyl (9), decyl (10) and dodecyl (11) groups, a nd of bis(4-ethyloxybenzylidene-4'-ethyloxyaniline)dichloropalladium(Ⅱ) as a model complex are described. The molecular structure with twisted board-like geometry of the complex resulting from the coordination of Pd(Ⅱ) with η1-imine bonding was confirmed by X-ray crystallographic analysis of the model complex. In contrast to the imine ligands, all the complexes with an exception of 11 display a thermally stable monotropic smectic A mesophase without any decomposition of the complex. These results, characterized by a combination of differential scanning calorimetry, optical polarized microscopy, and powder X-ray scattering experiments, are discussed.

• 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.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2007년도 추계학술발표대회
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• pp.1238-1241
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• 2007

웹 게시판 서비스에서의 비정상행위 탐지 및 블러킹 방안 제시는 서비스를 제공하는 주체에게는 대량의 광고성 게시글로부터 안정적 서비스 운영이 가능하게끔 하고, 서비스를 이용하는 사용자에게는 원하지 않는 게시글로부터 블러킹 방안을 제공 받아 깨끗한 웹 게시판 서비스를 가능한 방안으로 인터넷 환경이 제공되면서 필터링 기술 발전 수준이 가장 높은 스팸 메일 필터링 기술을 응용하여 웹 게시판 서비스에 적용하여 필터링 효과 수준을 측정하고 다른 웹 서비스 등에 활용할 수 있는 방안을 제시한다.

• Bulletin of the Korean Chemical Society
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• 제14권2호
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• pp.211-215
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• 1993

A multichannel optical detector system employing a self-scanning linear photodiode array has been developed. The photodiode array detector system is designed for various applications which require fast, multichannel detection of transient signals. The detector system consists of a controller which runs on an IBM personal computer and a detector head connected to the controller through a DB-15 cable. The entire scanning of 1024 detector elements is achieved in 20 ms. By using an on-board 16-bit counter/timer, the operational mode of the photodiode array detector is fully programmable by software. The design considerations and the performance of the photodiode array detector system is presented.

• 천문학회보
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• 제46권2호
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• pp.79.2-79.2
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• 2021

We explore the range of possibilities of temperatures, heated temperature, and Kappa values of a current sheet observation on 2017 September 10. First, we construct a grid model with rapid heating (T_heat) and various Kappa (κ) values. We assume a simple density model and use adiabatic cooling to set the temperature during expansion. Next, we calculate the ion fractions using a time-dependent ionization model with adiabatic cooling and various Kappa values. The calculated ion fractions are used to simulate the DNs of the Atmospheric Imaging Assembly on board the Solar Dynamic Observatory. Then, we explore the possible range of the temperatures and Kappa values, comparing the simulated images with the observations. Finally, we discuss the range of the heated temperature and Kappa values and whether the result of this study suggests continuous heating of the current sheet plasma during the expansion.

• 한국의상디자인학회지
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• 제9권2호
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• pp.155-166
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• 2007

The purpose of the research is to provide the operation plans of internet marketing for effective application as marketing tools by analyzing the application status of marketing mix through the 30 websites of sportswear brands. Firstly, a study on the marketing mix strategy of sportswear brands presents that most brands put a high priority on promotion strategy by achieving online marketing. Secondly, compared with the other company brands which have online shopping mall, the website of sportswear brands consists of centered brand image. Therefore, based on the analysis about the variety of products and merchandise picture in each item and detailed information offer of neo-products introduction, marketing mix is insufficient in the website of sportswear and the price strategy has the least information. After website of sportswear brands is connected with online-shopping mall, guidance for its price and product is performed mainly. Consequently the sales promotion strategy of price needs development through the incentive and discount price. Promotion strategy occupies more parts than any other strategy. Especially, it allows a high proportion of the variety of events and information for the customer services. Also it needs to improve its bulletin board and Q&A board on the website for better communication with customers. Furthermore distribution strategy focuses on information such as location, contact numbers and address of the online shopping mall. Although online shopping mall has its own advantage which is marketing on the internet, it is not yet in progress.

• 한국비블리아학회지
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• 제21권3호
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• pp.45-56
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• 2010

본 연구는 한국의학도서관협의회 소속의 대학 및 병원도서관을 대상으로 웹사이트 구축현황을 살펴보고, 나아가 웹사이트를 운영하고 있는 국내 29개 의과대학도서관 웹사이트의 메뉴구성과 콘텐츠를 비교, 분석하였다. 본 연구의 결과는 다음과 같다. 첫째, 의학도서관 웹사이트의 메인메뉴는 소장자료검색, 전자정보원, 도서관서비스, My Library, 도서관안내, 게시판의 6개로 정리된다. 둘째, 의학도서관 웹사이트에서 제공하는 주요 정보서비스는 '자관 Pubmed, 원문복사/상호대차, 정보검색, 이용교육, 논문작성지원, SDI서비스, 모바일서비스, 학위논문제출, 참고정보원, 교외접속, 주제별서비스, 인용정보분석, 대출예약/연기, 희망도서신청, Q&A게시판'의 15가지이다. 셋째, 가장 많은 기관에서 제공하고 있는 정보서비스는 원문복사/상호대차이며, 다음은 '대출예약/연기, 희망도서신청, 교외접속, 이용교육, 참고정보원, Q&A게시판, 자관 Pubmed, 학위논문제출' 등의 순이다.

• 천문학회보
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• 제43권1호
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• pp.53.1-53.1
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• 2018

During a major solar eruption, the erupting plasma is possibly out of the equilibrium ionization state because of its rapid heating or cooling. The non-equilibrium ionization process is important in a rapidly evolving system where the thermodynamical time scale is shorter than the ionization or recombination time scales. We investigate the effects of non-equilibrium ionization on EUV and X-ray observations by the Atmospheric Imaging Assembly (AIA) on board Solar Dynamic Observatory and X-ray Telescope (XRT) on board Hinode. For the investigation, first, we find the emissivities for all the lines of ions of elements using CHIANTI 8.07, and then we find the temperature responses multiplying the emissivities by the effective area for each AIA and XRT passband. Second, we obtain the ion fractions using a time-dependent ionization model (Shen et al. 2015), which uses an eigenvalue method, for all the lines of ion, as a function of temperature, and a characteristic time scale, $n_et$, where $n_e$ and t are density and time, respectively. Lastly, the ion fractions are multiplied to the temperature response for each passband, which results in a 2D grid for each combination of temperature and the characteristic time scale. This is the set of passband responses for plasma that is rapidly ionized in a current sheet or a shock. We investigate an observed event which has a relatively large uncertainty in an analysis using a differential emission measure method assuming equilibrium ionization state. We verify whether the observed coronal plasmas are in non-equilibrium or equilibrium ionization state using the passband responses.

• 정보교육학회논문지
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• 제13권2호
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• pp.183-192
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• 2009

웹 기반 독서토론 학습은 웹이라는 가상의 공간에서 독서토론에 참여한 학습자간의 의견 교환을 통해 도서의 내용이해와 사고의 확장을 도모할 수 있는 교수 방법으로 토론의 장소를 웹이라는 새로운 공간에 적용한 수업형태이다. 웹 기반 토론 학습은 다른 사람의 의견을 존중하는 태도와 합리적인 사고와 의사표현 능력이 성패를 좌우할 수 있으므로 학습자들의 활발한 상호작용이 가능하도록 학습 환경을 제공해 주는 것이 필요하다. 이에 본 연구에서는 위키 프로그램을 적용하여 보다 나은 학습자간의 상호작용을 위한 웹 기반 독서토론시스템을 개발하고 유용성을 검증해 보았다. 이를 통해 기존의 댓글 방식의 수직적인 토론이 아닌 다차원적인 토론이 가능하게 될 것이다.

• 천문학회보
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• 제44권1호
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• pp.53.1-53.1
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• 2019

We apply a non-equilibrium ionization (NEI) model to a supra-arcade plasma sheet, shocked plasma, and current sheet. The model assumes that the plasma is initially in ionization equilibrium at low temperature, and it is heated rapidly by a shock or magnetic reconnection. The model presents the temperature and characteristic timescale responses of the Atmospheric Imaging Assembly (AIA) on board Solar Dynamic Observatory and X-ray Telescope (XRT) on board Hinode. We compare the model ratios of the responses between different passbands with the observed ratios of a supra-arcade plasma sheet on 2012 January 27. We find that most of observations are able to be described by using a combination of temperatures in equilibrium and the plasma closer to the arcade may be close to equilibrium ionization. We also utilize the set of responses to estimate the temperature and density for shocked plasma associated with a coronal mass ejection on 2010 June 13. The temperature, density, and the line of sight depth ranges we obtain are in reasonable agreement with previous works. However, a detailed model of the spherical shock is needed to fit the observations. We also compare the model ratios with the observations of a current sheet feature on 2017 September 10. The long extended current sheet above the solar limb makes it easy to analyze the sheet without background corona. We find that the sheet feature is far from equilibrium ionization while the background plasma is close to equilibrium. We discuss our results with the previous studies assuming equilibrium ionization.