264 research outputs found
Regulatory influence, board characteristics and climate change disclosures: evidence from environmentally sensitive firms in developing economy context
Get PDFPurposeThis study aims to examine the impact of board characteristics on climate change disclosures (CCDs) in the context of an emerging economy, with a unique focus on regulatory influences.Design/methodology/approachThis study analyzes longitudinal data (2014–2021) from environmentally sensitive firms listed on the Dhaka Stock Exchange, using a disclosure index developed within the Global Reporting Initiative framework. The authors use a neo-institutional theoretical lens to explore regulatory influences on CCD through board characteristics. This study uses hand-collected data from annual reports owing to the absence of an established database.FindingsThe results indicate that a larger board size, the presence of foreign directors and the existence of an audit committee correlate with higher levels of CCD disclosure. Conversely, a higher frequency of board meetings is associated with lower CCD disclosure levels. This study also observed an increase in CCD following the implementation of corporate governance guidelines by the Bangladesh Securities and Exchange Commission, albeit with a relatively low number of firms making these disclosures.Research limitations/implicationsThis study contributes to the climate change reporting literature by providing empirical evidence of regulatory influences on CCD through board characteristics in an emerging economy. However, the findings may not be universally applicable, considering the study’s focus on Bangladeshi listed firms.Practical implicationsThis study suggests growing pressures for diverse stakeholders, including researchers and regulatory bodies, to integrate climate change disclosure into routine activities. This study offers a valuable framework and insights for various stakeholders.Social implicationsBy emphasizing the influence of good governance and sustainability practices, this study contributes to stakeholders’ understanding, aiming to contribute to a better world.Originality/valueThis study stands out by uniquely positioning itself in the climate change reporting literature, shedding light on regulatory influences on CCD through board characteristics in the context of an emerging economy
BUILDING OWN INSTITUTIONAL ASSET USING DSPACE WITH REFERENCE TO IIT KHARAGPUR CENTRAL LIBRARY INSTITUTIONAL DIGITAL REPOSITORY
No full textTanmay Saha Anup Da
Macroeconomic fundamentals and exchange rate volatility during the floating exchange rate regime in India
No full textCorrection: Anup C. Katheria. Neonatal Resuscitation with an Intact Cord: Current and Ongoing Trials. <i>Children</i> 2019, <i>6</i>, 60
No full textThe author wishes to make the following corrections to this paper [...
Integración de técnicas de procesamiento paralelo en el descodificador de vídeo de última generación VVC, sobre la plataforma Jetson AGX Xavier
No full textEl presente Proyecto de Fin de Grado está enmarcado en la línea de investigación orientada a codificación y descodificación de vídeo digital en la que trabaja el Grupo de Diseño Electrónico
y Microelectrónico (GDEM), integrado en el Centro de Investigación en Tecnologías Software y Sistemas Multimedia para la Sostenibilidad (CITSEM) de la Universidad Politécnica de Madrid, desde hace más de 20 años. La motivación de este trabajo va de la mano con el crecimiento exponencial de la demanda de vídeo digital de alta calidad, aplicaciones multimedia y de realidad virtual a nivel mundial, cuyo enfoque durante la última década ha girado en torno a la utilización en tiempo real de dichos servicios. Los datos relativos a la transmisión de vídeo digital representan aproximadamente el
58% del tráfico total en internet, lo que ejemplifica la importancia y magnitud actual de este sector. Los estándares de codificación, aunque poco conocidos por el usuario de a pie, son un eslabón clave en este proceso de evolución tecnológica; actuando como elemento integrador entre los avances a nivel de calidad de imagen y las limitaciones en cuanto a capacidad de
almacenamiento, ancho de banda de transmisión y capacidad de procesamiento de las plataformas disponibles. Versatile Video Coding es el más reciente estándar de codificación de vídeo y también la base del presente proyecto, ofreciendo mejoras de hasta 50% en la tasa de compresión respecto a su antecesor Hight Efficiency Video Coding. Estas mejoras vienen con un coste asociado al aumento de la complejidad de los cálculos, añadiendo carga computacional al proceso. Para conseguir la
adopción de una actualización como esta, es necesario explorar nuevas alternativas que permitan mejorar su eficiencia a nivel de tiempo de ejecución. Una solución que se está haciendo cada
vez más popular ante este tipo de retos es la implementación de soluciones sobre plataformas heterogéneas, aprovechando las ventajas particulares de los distintos tipos de procesadores que las integran. Ante la problemática enunciada, en este proyecto se ha llevado a cabo un análisis de la distribución
de carga computacional del descodificador VVC, con especial énfasis en el bloque de filtrado Adaptive Loop Filter. Además, se han llevado a cabo tres implementaciones del descodificador
sobre la plataforma heterogénea Nvidia AGX Xavier, migrando parcialmente el procesamiento de la etapa de filtrado mencionada a la Graphic Processing Unit integrada. Como resultado, se ha conseguido un tiempo de ejecución doce veces más rápido respecto a la implementación original.
Abstract:
This Final Degree Project is framed in the digital video coding and decoding research line in which the Electronic and Microelectronic Design Group (GDEM), integrated in the Research
Center in Software Technologies and Multimedia Systems for Sustainability (CITSEM), has been working for more than 20 years. The motivation of this work relies on the worldwide exponential growth in demand for high quality digital video, multimedia applications and virtual reality, with special peak during the last decade in relation to the use of these services in real time. The data related to digital video transmission represents approximately 58% of total internet traffic, exemplifying the importance and current magnitude of this sector. Despite being not well known by the regular user, coding standards play a key role in this technological evolution process; since they act as an integrating element between the advances in image quality and the limitations in terms of storage capacity, transmission bandwidth and processing power of the available platforms. Versatile Video Coding is the most recent video coding standard and the base of this project, offering up to 50% improvement in compression rate over its predecessor High Efficiency Video Coding. These benneficts come with a cost associated to the increase of calculation complexity, adding computacional load to the process. Accordingly, for this new standard to be adopted, new proposals to improve its runtime efficiency must be studied. Solutions based on heterogeneous platforms are becoming popular when it comes to conquer these type of challenges, taking
advantage of the feautures of the different types of processors that integrate them. Aiming for solving the enounced problem, this project has carried out an analysis of the computational
load distribution over the new VVC decoder, with special emphasis on the Adaptive Loop Filter block. Also three implementations of the decoder have been developed using the
Nvidia AGX Xavier heterogeneous platform to partially migrate the processing of the mentioned filtering block to the integrated Graphic Processing Unit, taking advantage of its microarchitecture feautures for achieving parallel processing and accelerated computing. As result, execution time have improved twelve times compared to the original implementation
Frontmatter, Table of Contents, Preface, Program Commitees, External Reviewers, List of Authors
No full textFrontmatter, Table of Contents, Preface, Program Commitees, External Reviewers, List of Author
Credit Card Security
Get PDFAuthor: Anup G.C.
Year: 2013
Subject of thesis: Credit Card Security
Number of pages: 36+2
Credit Card is a widely used electronic chip for easy transactions. The main purpose of the report was to show the security measures of transaction by credit cards. The purpose was to give information about credit cards and how they were introduced. The thesis reportcontained the types of card theft with examples and sited the various protocols used for online transactions. The aim of the thesis project was to conclude whether the card security provided by the banks is safe enough.
The thesis report contained information about many online resources as well as liable books. Many news articles were also considered while writing the report for the card theft records.
The thesis report described both the positive and negative aspects of the protocols used for card securities. Result showed that misuse and complicated processes of protocols has led the identity theft to transactions. To conclude, although many security measures are implemented for the secure transactions, credit card fraud activities are happening in a weekly basis
Article and Author Level Measurements
Get PDFArticle and author level measurements have been discussed in this Unit. Author and researcher identifiers are absolutely essential for searching databases in the WWW because a name like D Singh can harbour a number of names such as Dan Singh, Dhan Singh, Dhyan Singh, Darbara Singh, Daulat Singh, Durlabh Singh and more. The ResearcherID.com, launched by Thomson Reuters, is a web-based global registry of authors and researchers that individualises each and every name. Open Researcher and Contributor ID (ORCID) is also a registry that uniquely identifies an author or researcher. Both have been discussed in this Unit. Article Level Metrics (Altmetrics) has been treated in this Unit with the discussion as to how altmetrics can be measured with Altmetric.com and ImpactStory.org. Altmetrics for Online Journals has also been touched. There are a number of academic social networks of which ResearchGate.net, Academia.edu, GetCited.org, etc. have been discussed. Regional journal networks with bibliometric indicators are also in existence. Two networks of this type such as SciELO – Scientific Electronic Library Online, and Redalyc have been dealt with. This Unit discusses in details aspects such as Unique Identifiers for Authors and Researchers; Article Level Metrics (Altmetrics); Academic Social Networks; and Regional Journal Networks with Bibliometric Indicators
Integración de técnicas de optimización y aceleración sobre un descodificador Versatile Video Coding en sistemas empotrados heterogéneos
No full textEste Proyecto Fin de Grado se ha realizado en el Grupo de Diseño Electrónico y Microelectrónico (GDEM), que forma parte del Centro de Investigación en Tecnologías Software y Sistemas
Multimedia para la Sostenibilidad (CITSEM), y se enmarca en el ámbito de la codificación y decodificación de vídeo digital. El auge de la demanda de este tipo de contenidos hace necesario
el desarrollo de nuevos algoritmos de compresión más eficientes pero ello hace que sean más complejos computacionalmente. En este sentido, el nuevo estándar de compresión Versatile Video
Coding (VVC) marca el actual estado del arte. Se ha trabajado con la implementación VVdeC versión 0.2.0.0 del estándar VVC, realizada por el instituto de investigación de Fraunhofer, Alemania. El objetivo principal es mejorar el rendimiento de este decodificador para alcanzar decodificación en tiempo real en una plataforma heterogénea embebida como es NVIDIA AGX Xavier mediante el uso de técnicas de paralelización como la migración de partes de código a una Graphic Processing Unit (GPU) caracterizada por la realización de cálculos de baja complejidad pero con un alto grado de paralelización. También,
se usarán instrucciones Single Instruction Multiple Data (SIMD) para aumentar el rendimiento. Inicialmente, se ha realizado la adaptación de VVdeC a la plataforma con la que se ha trabajado. También se ha realizado un análisis de los bloques más importantes del proceso de decodificación de VVC. A continuación, se ha incluido las instrucciones SIMD y se utiliza la biblioteca SIMDe para la conversión de operaciones SIMD de procesadores x86 a la arquitectura Neon que usa ARM. Finalmente, se han analizado los tiempos conseguidos usando instrucciones SIMD y se han comparado dichos resultados con los obtenidos sin instrucciones SIMD. La otra técnica de optimización a explotar es el uso de la GPU mediante el traslado de funciones clave a la tarjeta gráfica. Esto implica un proceso continuo de análisis de código en Central Processing Unit (CPU) y GPU, optimización de la implementación de la GPU, evaluación de los resultados y vuelta a analizar el código, hasta que se considera que se ha llegado a un punto adecuado. Por último, se destacan posibles caminos a seguir así como las conclusiones obtenidas tras el largo proceso de desarrollo de la implementación de la función en GPU.
Abstract:
This Final Degree Project was carried out in the Electronic and Microelectronic Design Group (GDEM) and the project is situated in the field of coding and decoding digital video. The increment of demand in this type of content makes compulsory the development of new and more efficient codecs but this imply that they are more computationally complex. Due to this
necessity Versatile Video Coding (VVC) was released. This project worked with VVdeC version 0.2.0.0, an implementation of VVC standard made by the Fraunhofer research institute, in Germany. The main objective is to improve the performance to archive real-time decoding in a heterogeneous platform like NVIDIA AGX Xavier. Technologies of parallelization were used like moving parts of the code to a Graphic Processing Unit (GPU) because it is capable of executing low complexity operation but with high parallelization degree. Moreover, Single Instruction Multiple Data (SIMD) instructions were used to improve the performance too. First, VVdeC is adapted to run in the NVIDIA AGX Xavier platform, and an analysis of the main blocks was done to identify the most time consuming blocks. Next, SIMD instructions were included. For this SIMDe library was used to convert SIMD instructions used for x86 processors to others that the Neon architecture uses. Lastly, the results when SIMD is activated were analysed. In addition, Graphic Processing Unit (GPU) was used to migrate a function that takes a significant portion of the decoding process to the graphic processor. This migration consists of a continuous process of analyzing Central Processing Unit (CPU) and GPU code, optimizing GPU code, evaluating the results and analyse the code again. This is repeated until it is considered that the process of optimization cannot go further. Finally, several future lines of investigation are mentioned as well as conclusions obtained after the implementation and migration of the function to GPU
A multiphase phase-field study of three-dimensional martensitic twinned microstructures at large strains
Get PDFA thermodynamically consistent multiphase phase-field approach for stress and temperature-induced martensitic phase transformation at the nanoscale and under large strains is developed. A total of N independent order parameters are considered for materials with N variants, where one of the order parameters describes A M transformations and the remaining N-1 independent order parameters describe the transformations between the variants. A non-contradictory gradient energy is used within the free energy of the system to account for the energies of the interfaces. In addition, a non-contradictory kinetic relationships for the rate of the order parameters versus thermodynamic driving forces is suggested. As a result, a system of consistent coupled Ginzburg-Landau equations for the order parameters are derived. The crystallographic solution for twins within twins is presented for the cubic to tetragonal transformations. A 3D complex twins within twins microstructure is simulated using the developed phase-field approach and a large-strain-based nonlinear finite element method. A comparative study between the crystallographic solution and the simulation result is presented.This is a pre-print of the article Basak, Anup, and Valery I. Levitas. "A multiphase phase-field study of three-dimensional martensitic twinned microstructures at large strains." arXiv preprint arXiv:2206.12576 (2022).
DOI: 10.48550/arXiv.2206.12576.
Copyright 2022 The Author(s).
Attribution 4.0 International (CC BY 4.0).
Posted with permission
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