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author = "Megías Jiménez, David"
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Found 18 documents, displaying page 2 of 2

SiMR: A simulator for learning computer architecture

Author(s) : Sánchez Carracedo, Fermín , Megías Jiménez, David , Prieto Blázquez, Josep
Description : This paper presents SiMR, a simulator of the Rudimentary Machine designed to be used in a first course of computer architecture of Software Engineering and Computer Engineering programmes. The Rudimentary Machine contains all the basic elements in a RISC computer, and SiMR allows editing, assembling...
Repository : Repositori institucional de la UOC, O2
Language(s) : Old English

Efficient self-synchronised blind audio watermarking system based on time domain and FFT amplitude modification

Author(s) : Megías Jiménez, David , Serra Ruiz, Jordi , Fallahpour, Mehdi
Description : Many audio watermarking schemes divide the audio signal into several blocks such that part of the watermark is embedded into each of them. One of the key issues in these block-oriented watermarking schemes is to preserve the synchronisation, i.e. to recover the exact position of each block in the ma...
Repository : Repositori institucional de la UOC, O2
Language(s) : Old English

Lossless Image Data Embedding in Plain Areas

Author(s) : Fallahpour, Mehdi , Megías Jiménez, David , Shi, Yun Q.
Description : This letter presents a lossless data hiding scheme for digital images which uses an edge detector to locate plain areas for embedding. The proposed method takes advantage of the well-known gradient adjacent prediction utilized in image coding. In the suggested scheme, prediction errors and edge valu...
Repository : Repositori institucional de la UOC, O2
Language(s) : Old English

A robust audio watermarking scheme based on MPEG 1 Layer 3 Compression

Author(s) : Megías Jiménez, David , Minguillón Alfonso, Julià , Herrera Joancomartí, Jordi
Description : This paper describes an audio watermarking scheme based on lossy compression. The main idea is taken from an image watermarking approach where the JPEG compression algorithm is used to determine where and how the mark should be placed. Similarly, in the audio scheme suggested in this paper, an MPEG ...
Repository : Repositori institucional de la UOC, O2
Language(s) : Old English

Introducción al software libre en general y a los SIG libres en particular

Author(s) : Megías Jiménez, David , Pérez Navarro, Antoni , Bain, Malcolm
Description : En este documento se analizan los conceptos clave relacionados con el software libre: ¿qué es el software libre? ¿qué es el software propietario? ¿qué es el software gratuito? ¿qué es una licencia copyleft? A continuación se muestra cómo las aplicaciones horizontales libres se desarrollan de forma d...
Repository : DUGiDocs – Universitat de Girona
Language(s) : Spanish

Software libre y sistemas de información geográfica: conceptos, definiciones y aspectos legales

Author(s) : Bain, Malcolm , Megías Jiménez, David , Pérez Navarro, Antoni
Description : This article covers some of the principal legal aspects of free and open software applied to Geographic Information Systems. Starting out form basic concepts in FOSS licensing, it aims to deal with questions such as "who is responsible for FOSS projects'", "how are they developed?", "who is the owne...
Repository : DUGiDocs – Universitat de Girona
Language(s) : Spanish

Tools and utilities in free software

Author(s) : Megías Jiménez, David , Mas i Hernàndez, Jordi , Guerrero Roldán, Ana Elena , Corrius i Llavina, Jesús
Description : This tools and utilities course will introduce students to some of the programs designed for the desktop environments of end users. We can use these programs to browse the Internet securely (Mozilla), manage our e-mail and work in groups (Ximian Evolution) and to create Microsoft-Office style text d...
Repository : Repositori institucional de la UOC, O2
Language(s) : English

Open Educational Resources: an opportunity for virtual learning institutions

Author(s) : Córcoles Briongos, César , Megías Jiménez, David , Minguillón Alfonso, Julià , Ferran Ferrer, Núria , Valverde, Llorenç
Description : The Universitat Oberta de Catalunya (UOC, Open University of Catalonia) is involved in several research projects and educational activities related to the use of Open Educational Resources (OER). Some of the discussed issues in the concept of OER are research issues which are being tackled in two EC...
Repository : Repositori institucional de la UOC, O2
Language(s) : Old English
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Found 18 documents, displaying page 2 of 2