Search results for "DCA"

A Hooke's law-based approach to protein folding rate

2014

Kinetics is a key aspect of the renowned protein folding problem. Here, we propose a comprehensive approach to folding kinetics where a polypeptide chain is assumed to behave as an elastic material described by the Hooke[U+05F3]s law. A novel parameter called elastic-folding constant results from our model and is suggested to distinguish between protein with two-state and multi-state folding pathways. A contact-free descriptor, named folding degree, is introduced as a suitable structural feature to study protein-folding kinetics. This approach generalizes the observed correlations between varieties of structural descriptors with the folding rate constant. Additionally several comparisons am…

Canopy Architecture Appraisal by Fractal Dimension of 'Flordastar' Peach Trees Grafted onto Different Rootstocks

2007

The objective of this research was to evaluate the modification of canopy architecture of ''Flordastar'' peach (Prunus persica L. Batsch) grafted onto rootstocks with different vigour, by the use of fractal dimension (D). The hypothesis was that different vigour rootstocks are able to modify the complexity of the branching pattern and that this effect can be assessed by a geometric parameter such as the fractal dimension (D) of the 2D projection of tree branching structure. The observations were carried out in a four-year-old experimental orchard of cv. ''Flordastar'' peach trees grafted onto Ishtara, Barrier, GF677 and MrS 2/5 rootstocks. On digital pictures of leafless, dormant peach tree…

Performance evaluation of the MPE-iFEC Sliding RS Encoding for DVB-H streaming services

2008

This article studies the performance of the Sliding RS Encoding (SRSE) in the transmission of streaming services in DVB-H (Digital Video Broadcasting - Transmission System for Handheld Terminals) networks. The SRSE forms part of a set of specifications called MPE-iFEC which has been recently defined in the DVB-SH (Digital Video Broadcasting - Satellite Services to Handheld Devices) standard and is fully compatible with the link layer of DVB-H. MPE-iFEC is capable of encoding information related to different datagram bursts in a jointly manner in order to counteract the long signal blockages expected in satellite reception. This is what is usually referred to as Multi-Burst Encoding (MBE) an…

An explanation for unexpected 802.11 outdoor link-level measurement results

2008

This paper provides experimental evidence that "weird'/poor outdoor link-level performance measurements may be caused by driver/card-specific antenna diversity algorithms unexpectedly supported/activated at the WLAN transmitter side. We focus our analysis on the Atheros/MADWiFi card/driver case, and we observe that the transmit antenna diversity mechanisms remain by default enabled when the available antennas are not homogeneous in terms of gain or, even worse, when only a single antenna is connected. This may cause considerable performance impairments (large frame loss ratio), in conditions frequently encountered in outdoor link deployments. The negative impact of transmit antenna diversit…

Contenidos virales en los informativos de televisión : el caso del profesor Kelly, entre el humor y el estereotipo

2019

Este artículo se encuentra disponible en la siguiente URL: https://revistadigitos.com/index.php/digitos/article/view/144/82 Esta número de la revista lleva por título "Acción colectiva digital: estructuras, repertorios y discursos". El objeto de este estudio es analizar cómo un producto ‘viral’ pasa a formar parte de los contenidos informativos en televisión, de manera que los criterios de noticiabilidad evolucionan y sitúan al mismo nivel los hechos de actualidad y los productos-tuits, memes, gifs o vídeos procedentes de las redes sociales. Para ejemplificar este argumento analizaremos el eco mediático del vídeo de la entrevista realizada el 10 de marzo de 2017 por la BBC al profesor de Re…

ReMindCare: Una aplicación para primeros episodios psicóticos integrada en la práctica clínica diaria

2021

Objetivos: El objetivo fundamental de esta tesis es el de desarrollar e implementar un sistema de atención sanitaria e-Health (App para smartphone) en la práctica clínica diaria en una unidad de Primeros Episodios Psicóticos (PEP). Objetivos Específicos: Los objetivos específicos que se buscan conseguir mediante la implementación de este dispositivo son los siguientes: (1) mejora de la atención temprana ante posibles recaídas, (2) reducción de las visitas a los servicios de urgencias y (3) reducción de las rehospitalizaciones. Métodos: El diseño de la app se basó en dos estudios previos y un estudio piloto. Se trata de una aplicación dirigida a pacientes de la unidad PEP del Hospital Clínic…

Investigation of data encryption impact on broadcasting visible light communications

2014

Este trabajo investiga el impacto de la encriptación y desencriptación de datos en un sistema de comunicaciones de luz visible (VLC) de difusión en interiores incrustado en la capa física. Se ha implementado el cifrado RSA para proporcionar una transmisión de datos segura en la capa física. El artículo muestra el rendimiento de la tasa de error de bits (BER) para los sistemas VLC seguros y no seguros (8 y 12 bits) para velocidades de datos de 2 y 12 Mbps. Para una BER de 10e-4 mostramos que hay penalizaciones de potencia de 2-4 dB con las VLC seguras. También se investiga el impacto de la longitud de la clave en la propagación del error y la penalización de potencia. EU Cost Action IC1101 T…

Local childcare policy and the changing gender contract

2018

Purpose The purpose of this paper is to examine the changes in local childcare policy that have taken place between the years 2008 and 2016 in the city of Jyväskylä, Finland, and to study how the local gender contract for women is being reshaped via these transformations in local policy. Design/methodology/approach Case study was applied as a research strategy. Local and national level statistics were used to explore the use of childcare services. Documents regarding the decision-making and administration of childcare in the city were analysed to distinguish the local policy changes during the time period. These documents include city budgets and records from the two municipal boards that …

Always on the move? Measured physical activity of 3-year-old preschool children

2015

Hybrid VLC/WiFi Architectures with Priority Feedback Channels

2022

In this paper, we consider integrating Visible Light Communication (VLC) and WiFi technologies in an ultra-dense (massive) Internet of Things scenario, where WiFi links are used for complementing VLC links and vice-versa. Indeed, in case of mobility and/or bidirectional communications, limited coverage areas and self-generated interference can be an issue. We consider hybrid VLC/WiFi nodes where the VLC link is used for the majority of (data) traffic and the WiFi link is employed as a feedback channel (e.g. transmitting TCP ACKs). In presence of intense WiFi traffic, the WiFi network may be congested and thus, to fully exploit the VLC bandwidth, we discuss possible priority mechanisms to fu…