Tiered architecture for remote access to data sources

Teamwork is benefited by the use of shared data sources. Also, ever increasingly, organizational work depends on the activities of team members situated in different physical locations, including both employees who work from their homes and others who have been temporarily transferred to another place. Since, for all these reasons, accessing data remotely is a growing need, organizations implement internal systems in order to control shared data access according to user privileges. In this regard, the cost of resource transportation needed to generate communication must be considered. The main contribution of this paper is the extended reference layered architecture ICDFSCV (Interface Control and Distributed File Systems - Communication Versioning). It allows to build a solution that, facilitates documents download and the creation and concurrent modification by multiple users through versioning control.Facultad de Informátic

DPMbox: An interactive user-friendly web interface for a disk-based grid storage system

Disk Pool Manager (DPM) es un sistema de gestión de almacenamiento que se usa dentro del Worldwide LHC Computing Grid. Ha sido desarrollado en el CERN y actualmente es el más usado dentro de esta infraestructura de computación distribuida. Avanzando hacia el uso de estándares que faciliten el uso de DPM, recientemente se implementó una interfaz WebDAV (una extensión del protocolo HTTP) para este sistema. A pesar de ello esta interfaz aún ofrece una funcionalidad básica, sobre todo accediendo desde un navegador web, lo que hace que siga siendo necesario usar algunas herramientas especiales. El objetivo de DPMbox es ofrecer una interfaz realmente amigable, intuitiva y que pueda usarse con herramientas ya conocidas por los usuarios, como es el caso de un navegador web, atrayendo así a usuarios menos técnicos de la comunidad científica. El proyecto basa su construcción en la interfaz WebDAV implementada y hace uso de tecnologías maduras y estándar que permiten este desarrollo como JavaScript/ECMAScript a través de jQuery u otras librerías de apoyo, así como HTML y CSS. Al realizarse como colaboración con el CERN el desarrollo se centra en las funcionalidades requeridas por el sistema DPM. Aún así, uno de los objetivos es que habiendo cumplido los requisitos iniciales, el sistema sea extensible y facilmente adaptable, haciendo posible su uso con otros sistemas que ofrezcan el protocolo WebDAV de manera general.Disk Pool Manager (DPM) is a lightweight storage management system for grid sites. It has been developed in CERN (European Organization for Nuclear Research), and it is the most widely adopted solution in the Worldwide LHC Computing Grid infrastructure. Attracting less technical users has been an objective for the last years, thus, as an effort to move towards standard protocols that removes the need of special tools, DPM started offering a WebDAV (an extension of the HTTP protocol) interface, facilitating the access through commonly available tools, i.e. web browsers or WebDAV clients. However, this interface only provides basic functionality, especially when accessed from a web browser, making it still necessary to use some specific tools. DPMbox is a project for a friendly web interface that allows both technical and nontechnical users to manage their data from and into the grid by accessing it trough their web browsers. The project has been built getting advantage of the implemented WebDAV front-end, and as a web development it uses standard and mature web technologies like HTML, CSS and JavaScript/ECMAScript as its core language. As a collaboration with CERN, the development has been focused on the functionality required by the DPM, but one of the objectives is to make DPMbox easily expandable and flexible, enabling its use with other systems that offer the WebDAV protocol

Evaluating FAIR Digital Object and Linked Data as distributed object systems

FAIR Digital Object (FDO) is an emerging concept that is highlighted by European Open Science Cloud (EOSC) as a potential candidate for building a ecosystem of machine-actionable research outputs. In this work we systematically evaluate FDO and its implementations as a global distributed object system, by using five different conceptual frameworks that cover interoperability, middleware, FAIR principles, EOSC requirements and FDO guidelines themself. We compare the FDO approach with established Linked Data practices and the existing Web architecture, and provide a brief history of the Semantic Web while discussing why these technologies may have been difficult to adopt for FDO purposes. We conclude with recommendations for both Linked Data and FDO communities to further their adaptation and alignment.Comment: 40 pages, submitted to PeerJ C

Application for Encrypted Communication

Cílem této bakalářské práce je vytvořit aplikaci pro operační systém Android, která umožňuje komunikaci přes šifrované OpenVPN spojení. Aplikace podporuje textovou komunikaci, hlasovou komunikaci, přenos videa a sdílení souborů mezi uživateli. První polovinu práce tvoří teorie týkající se využitých technologií, mezi které patří OS Android, OpenVPN, SIP protokol pro hlasovou a video komunikaci, XMPP protokol pro textovou komunikaci a Owncloud pro sdílení souborů. Druhá polovina práce se zabývá samotnou implementací aplikace. Jsou zde popsány API a knihovny, které byly při práci využity, struktura výsledné aplikace a její fungování včetně ukázek.The objective of this thesis is to develop an application for Android operating system that allows to communicate via encrypted OpenVPN connection. Application supports text messaging, voice communication, video transfer and sharing files between users. The first part of this thesis consists of theoretical description of used technologies including Android OS, OpenVPN, SIP protocol for voice and video communication, XMPP protocol for text messagging and Owncloud for file sharing. The second part deals with the implementation of the application itself. It describes the used API and libraries, structure of the final application and it's functioning including pictures.440 - Katedra telekomunikační technikyvýborn

A Model for Managing Information Flow on the World Wide Web

Metadata merged with duplicate record (http://hdl.handle.net/10026.1/330) on 20.12.2016 by CS (TIS).This is a digitised version of a thesis that was deposited in the University Library. If you are the author please contact PEARL Admin ([email protected]) to discuss options.This thesis considers the nature of information management on the World Wide Web. The web has evolved into a global information system that is completely unregulated, permitting anyone to publish whatever information they wish. However, this information is almost entirely unmanaged, which, together with the enormous number of users who access it, places enormous strain on the web's architecture. This has led to the exposure of inherent flaws, which reduce its effectiveness as an information system. The thesis presents a thorough analysis of the state of this architecture, and identifies three flaws that could render the web unusable: link rot; a shrinking namespace; and the inevitable increase of noise in the system. A critical examination of existing solutions to these flaws is provided, together with a discussion on why the solutions have not been deployed or adopted. The thesis determines that they have failed to take into account the nature of the information flow between information provider and consumer, or the open philosophy of the web. The overall aim of the research has therefore been to design a new solution to these flaws in the web, based on a greater understanding of the nature of the information that flows upon it. The realization of this objective has included the development of a new model for managing information flow on the web, which is used to develop a solution to the flaws. The solution comprises three new additions to the web's architecture: a temporal referencing scheme; an Oracle Server Network for more effective web browsing; and a Resource Locator Service, which provides automatic transparent resource migration. The thesis describes their design and operation, and presents the concept of the Request Router, which provides a new way of integrating such distributed systems into the web's existing architecture without breaking it. The design of the Resource Locator Service, including the development of new protocols for resource migration, is covered in great detail, and a prototype system that has been developed to prove the effectiveness of the design is presented. The design is further validated by comprehensive performance measurements of the prototype, which show that it will scale to manage a web whose size is orders of magnitude greater than it is today

Internet based molecular collaborative and publishing tools

The scientific electronic publishing model has hitherto been an Internet based delivery of electronic articles that are essentially replicas of their paper counterparts. They contain little in the way of added semantics that may better expose the science, assist the peer review process and facilitate follow on collaborations, even though the enabling technologies have been around for some time and are mature. This thesis will examine the evolution of chemical electronic publishing over the past 15 years. It will illustrate, which the help of two frameworks, how publishers should be exploiting technologies to improve the semantics of chemical journal articles, namely their value added features and relationships with other chemical resources on the Web. The first framework is an early exemplar of structured and scalable electronic publishing where a Web content management system and a molecular database are integrated. It employs a test bed of articles from several RSC journals and supporting molecular coordinate and connectivity information. The value of converting 3D molecular expressions in chemical file formats, such as the MOL file, into more generic 3D graphics formats, such as Web3D, is assessed. This exemplar highlights the use of metadata management for bidirectional hyperlink maintenance in electronic publishing. The second framework repurposes this metadata management concept into a Semantic Web application called SemanticEye. SemanticEye demonstrates how relationships between chemical electronic articles and other chemical resources are established. It adapts the successful semantic model used for digital music metadata management by popular applications such as iTunes. Globally unique identifiers enable relationships to be established between articles and other resources on the Web and SemanticEye implements two: the Document Object Identifier (DOI) for articles and the IUPAC International Chemical Identifier (InChI) for molecules. SemanticEye’s potential as a framework for seeding collaborations between researchers, who have hitherto never met, is explored using FOAF, the friend-of-a-friend Semantic Web standard for social networks