• Journal of Korean Society on Water Environment
• /
• v.39 no.6
• /
• pp.465-474
• /
• 2023

The chemical composition and molecular weight characteristics of dissolved organic matter (DOM) exert a profound influence on the efficiency of organic matter removal in water treatment systems, acting as efficiency predictive indicators. This research evaluated the primary chemical and molecular weight properties of DOM derived from diverse sources, including rivers, lakes, and biomasses, and assessed their relationship with the efficiency of coagulation/flocculation treatments. Dissolved organic carbon (DOC) removal efficiency through coagulation/flocculation exhibited significant correlations with DOM's hydrophobic distribution, the ratio of humic-like to protein-like fluorescence, and the molecular weight associated with humic substances (HS). These findings suggest that the DOC removal rate in coagulation/flocculation processes is enhanced by a higher presence of HS in DOM, an increased influence of externally sourced DOM, and more presence of high molecular weight compounds. The results of this study further posit that the efficacy of water treatment processes can be more accurately predicted when considering multiple DOM characteristics rather than relying on a singular trait. Based on major results from this study, a predictive model for DOC removal efficiency by coagulation/flocculation was formulated as: 24.3 - 7.83 × (fluorescence index) + 0.089 × (hydrophilic distribution) + 0.102 × (HS molecular weight). This proposed model, coupled with supplementary monitoring of influent organic matter, has the potential to enhance the design and predictive accuracy for coagulation/flocculation treatments targeting DOC removal in future applications.

• Tunnel and Underground Space
• /
• v.13 no.1
• /
• pp.33-43
• /
• 2003

Field investigations of the orientations of discontinuity planes inside the borehole for designing the underground rock structures have been depend solely on the borehole image-taking techniques. But, borehole image-taking has to be processed after the completion of drilling operation and also requires the handling of highly expensive apparatus so that practical application is very restricted. In this study Discontinuity Orientation Measurement (DOM) drilling system and discontinuity analysis model RoSA-DOM are developed to acquire the reliable information of rock structure by analyzing the characteristics of joint distribution. DOM drilling system retrieves the rock core on which the reference line of pre-fixed drilling orientation is engraved. Coordinates of three arbitrary points on the joint surface relative to the position of reference line are assessed to determine the orientation of joint plane. The position of joint plane is also allocated by calculating the location of core axis at which joint plane is intersected. Then, the formation of joint set is analyzed by utilizing the clustering algorithm. Total and set spacings are calculated by considering the borehole axis as the scanline. Engineering applicability of in-situ rock mass around the borehole is also estimated by calculating the total and regional RQDs along the borehole axis.

• KIPS Transactions on Computer and Communication Systems
• /
• v.8 no.5
• /
• pp.119-126
• /
• 2019

Typical software developed and used by North Korea is Red Star and internal application software. However, most of the existing research on the North Korean software is the software installation method and general execution screen analysis. One of the ways to identify software vulnerabilities is file fuzzing, which is a typical method for identifying security vulnerabilities. In this paper, we use file fuzzing to analyze the security vulnerability of the software used in North Korea's Seogwang Document Processing System. At this time, we propose the analysis of open document text (ODT) file produced by Seogwang Document Processing System, extraction of node based on Document Object Mode (DOM) to determine test target, and generation of mutation file through insertion and substitution, this increases the number of crash detections at the same testing time.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2002.11c
• /
• pp.1867-1870
• /
• 2002

OGC(Open GIS Consortium)에서는 GIS 분야에서 표준포맷을 이용한 공간데이터의 저장 및 상호운용성을 활성화하기 위하여 공간데이터를 XML(eXtensible Markup Language)로 인코팅하는 GML(Geographic Markup Language) 표준 메커니즘을 제안하였다. GML의 공간데이터를 이용하여 공간연산을 하기 위해서는 GML 문서에 접근하여 문서 내에 있는 공간객체를 다룰 수 있는 기능이 필요하다. GML의 기반인 GML에는 이러한 기능을 가진 표준인터페이스인 DOM(Document Obejct Model)이 있으나, GML문서 내의 공간객체에 대한 공간연산을 위한 인터페이스는 지원하지 않는다. 그래서 본 논문에서는 GML 문서의 공간데이터에 대한 공간연산을 위해 XML의 DOM 인터페이스를 확장하는 방안을 제안한다.

• Proceedings of the Korean Information Science Society Conference
• /
• 2000.04b
• /
• pp.6-8
• /
• 2000

웹 환경에서 OpenGIS(Open Geodata Interoperability Specification)의 상호 운용성을 검증하기 위한 웹 매핑 테스트베드는 기존의 웹 브라우저를 사용하여 다양한 데이터 서버에 저장된 지리 정보를 발견, 접근하는 것을 목적으로 한다. 이 환경에서 클라이언트는 맵 서버가 XML(Extensible Markup Language)로 부호화한 지리 정보를 전송 받아 화면에 출력할 뿐만 아니라, 이러한 XML 지리 정보에 대해 공간 분석을 수행해야 한다. W3C(World Wide Web Consortium)의 DOM(Document Object Model)은 XML 분석을 위해 표준화된 인터페이스를 제시하고 있으나 공간 분석을 위한 인터페이스는 지원하지 않는다. 본 논문은 웹 환경에서 다양한 데이터 서버로부터 전송된 XML 지리 정보의 공간 분석 방법을 제시한다. 먼저 공간 분석을 위해 국제 표준화 기구에서 제시된 공간 연산자들을 분류한다. 그리고 DOM에 공간 연산을 지원하는 공간 연산 인터페이스를 추가한 GDOM을 제시한다. 마지막으로 클라이언트에서 GDOM을 이용하여 공간 분석을 수행하는 경우에 공간 연산자 수행 방법을 기술한다.

• Proceedings of the Korean Information Science Society Conference
• /
• 2000.10a
• /
• pp.412-414
• /
• 2000

XML(eXensible Markup Language)은 차세대 인터넷 기술의 대표적인 기술 요소로서 현재 놀라운 속도로 발전하고 있으며 다양한 인터넷 응용분야에서 적용하고 있다. 이런 추세는 XML 어플리케이션을 복잡화, 대형화시키고 있으며 이로 인하여 XML 어프리케이션 개발과 유지 보수가 점점 어려워지고 있다. 이러한 문제점을 해결키 위해 객체지향 개발 방법론애 적용되어온 디자인 패턴(Design Patterns) 개념을 XML 개발 관련 분야에 적용시키는 연구가 이루어지고 있다. 본 논문에서는 XML 디자인 패턴 중 DTD(Document Type Definition) 모델링 시 발생하는 모호성(Ambiguity) 문제를 해결키 위한 패턴과 DOM을 효율적으로 처리하기 위한 문서 구조 트리 운행 및 접근 패턴을 제안한다. 이 패턴들을 활용한다면 DTD 설계 및 DOM(Document Object Model)을 처리하는 단계에서 재사용이 가능해져 개발된 기술들을 공유 가능하며 시스템 디자인 시에 발생 가능한 문제점들을 사전에 해결할 수 있다.

• Proceedings of the Korean Society of Broadcast Engineers Conference
• /
• 2016.11a
• /
• pp.1-3
• /
• 2016

Mixed and augmented reality (MAR) refers to a spatially coordinated combination of media/information components that represent on the real world and its objects, and on the other those that are virtual, synthetic and computer generated including any combination of aural, visual and touch. The extensible 3D (X3D) is the ISO standard for defining 3D interactive web-based 3D content integrated with multimedia. In this paper, we propose a model to integrate live actor and entity that captured from Microsoft Kinect to be represented in Web-based mixed augmented reality world by using X3DOM by which X3D nodes can be integrated seamlessly into HTML5 DOM content.

• Journal of Broadcast Engineering
• /
• v.18 no.1
• /
• pp.43-58
• /
• 2013

Richmedia Service means that interactive media service can provide view with various multimedia elements(such as Video, Audio, Text) at same time. Various Multimedia elements can be serviced by Scene Description technology standards like BIFS(Binary Format for Scenes) and LASeR(Light Application Scene Representation). By providing Scene Component information, richmedia service is available to various multimedia services. so users is available to personalized services fitting temporal and spatial options. In conventional technology, when the scene is changed by user or service, mobile deletes the scene of configuration information and makes new scene of configuration information. this is a very inefficient way. In this paper, Propoesed that by using DOM(Document Object Model) method, to pass only the dynamic configuration part, changes scene method.

• Journal of KIISE:Computing Practices and Letters
• /
• v.8 no.5
• /
• pp.510-519
• /
• 2002

The OpenGIS Consortium has proposed a new web-mapping technology to support interoperability in web GIS environment by developing the specifications of MapServer and GML. In this environment, the MapServer transforms legacy spatial data into GML data, and clients display them on standard web browsers. This web-mapping testbed proposes methods for discovering, accessing, integrating and displaying GIS information except processing of spatial operations which are essential services in GIS environment. This paper proposes the method for executing spatial operations on GML data which are overlays of different map layers in legacy data servers. To support spatial operations on GML data in web GIS environment, this paper designs and implements GDOM based on the W3C's DOM Specifications and OGC's Simple Features Specifications. This paper shows the specifications and implementation of GDOM and the process of spatial operations in web-mapping testbed environment.

• The Journal of Information Technology and Database
• /
• v.7 no.2
• /
• pp.17-32
• /
• 2000

As XML emerging as the Internet electronic document language standard of the next generation, the number of XML documents which contain vast amount of Information is increasing substantially through the transformation of existing documents to XML documents or the appearance of new XML documents. Consequently, XML document retrieval system becomes extremely essential for searching through a large quantity of XML documents that are storied in and managed by DBMS. In this paper we describe the design and implementation of BADA-IV/XML query processor that supports content-based, structure-based and attribute-based retrieval. We design XML query language based upon XQL (XML Query Language) of W3C and tightly-coupled with OQL (a query language for object-oriented database). XML document is stored and maintained in BADA-IV, which is an object-oriented database management system developed by ETRI (Electronics and Telecommunications Research Institute) The storage data model is based on DOM (Document Object Model), therefore the retrieval of XML documents is executed basically using DOM tree traversal. We improve the search performance using Node ID which represents node's hierarchy information in an XML document. Assuming that DOW tree is a complete k-ary tree, we show that Node ID technique is superior to DOM tree traversal from the viewpoint of node fetch counts.