Search results for "Lua"
showing 10 items of 3286 documents
A reconfigurable platform for evaluating the performance of QoS networks
2010
Nowadays, high performance System and Local Area Networks (SAN/LAN) have to serve heterogeneous traffic consisting of information flows with different bandwidth and latency requirements. This makes it necessary to provide Quality of Service (QoS) and optimize the design of network components. In this paper we present a hardware tool designed to analyze the performance of QoS networks, under given traffic conditions and server models. In particular, a reprogrammable multimedia traffic Generator/Monitor platform has been built. This permits prototyping the communication system of a high speed LAN/SAN on a single FPGA device. Hence, it can be used at design to produce more efficient devices. T…
QoS Multi-tree Based Routing Protocol for Inter-mesh Infrastructure Communications
2016
Part 5: Network Protocols; International audience; Quality of service (QoS) in wireless mesh networks (WMN) is an active area of research, which is driven by the increasing demand for real-time and multimedia applications, such as VoIP (Voice over IP) and VoD (Video on Demand). In this paper, we propose a QoS multi-tree based routing protocol for wireless mesh environments, named Inter-Mesh Infrastructure Proactive Routing (IMPR). It is a proactive multi-tree routing protocol enabling QoS guarantee for communications from/towards the Internet network through the Mesh Gateway (MG) of the mesh infrastructure. We describe and analyze the simulation results of different scenarios conducted on t…
QoS Based Routing Protocol for Intra-Mesh Infrastructure Communications
2015
International audience; Mesh Networks (WMNs) have been considered as a promising alternative to conventional wired networks, thanks to its flexibility and easy deployment. Thus, to ensure a satisfying level of QoS guarantees for real-time and streaming applications such as Voice over IP (VoIP) and Video on Demand (VoD), we propose a novel QoS based routing protocol for wireless mesh environments, called Hybrid QoS Mesh Routing (HQMR), jointly with a clustering algorithm to enhance scalability issues within the mesh infrastructure. HQMR is composed of two routing sub-protocols: a reactive routing sub-protocol for intra-infrastructure communications and a proactive QoS based multi-tree routin…
Self-configuring multipath intra-mesh infrastructure QoS based routing
2016
International audience; Multi-path routing concept was largely exploited in wireless networks to provide benefits such as fault tolerance, load balancing, performance improvement in terms of latency, etc. In this paper, we propose a multi-path routing based protocol named MP-IMRR (Multi-path Intra-Mesh infrastructure Routing protocol) to improve our previously defined QoS based routing protocol for wireless mesh networks (i.e. IMRR). MP-IMRR is defined in order to achieve better reactivity and faster recovery from eventual route failures than the IMRR protocol by adopting the backup routes concept. Besides, given the complexity increase while considering network management systems, we adopt…
Performance Analysis in Spatially Correlated IEEE 802.11 Networks
2012
Wireless mesh networks are difficult to be characterized, especially under multi-hop traffic streams. The problem is that the local view of the channel and the correlation between the buffers of consecutive nodes in a stream path make complicated the identification of the contention level perceived by each station along the time. Such a figure is used in the models based on the so called decoupling assumption for evaluating the final scheduling of simultaneous channel access grants. In this paper we propose a simplified mesh network model focused on capturing the correlation due to the network topology and traffic routes rather than the access protocol state at each node. To this purpose, w…
Small-diameter titanium Grade IV and titanium-zirconium implants in edentulous mandibles: three-year results from a double-blind, randomized controll…
2015
OBJECTIVE: The aim of this study was to compare crestal bone-level changes, soft tissue parameters and implant success and survival between small-diameter implants made of titanium/zirconium (TiZr) alloy or of Grade IV titanium (Ti) in edentulous mandibles restored with removable overdentures. MATERIALS AND METHODS: This was a randomized, controlled, double-blind, split-mouth multicenter clinical trial. Patients with edentulous mandibles received two Straumann bone-level implants (diameter 3.3 mm), one of Ti Grade IV (control) and one of TiZr (test), in the interforaminal region. Implants were loaded after 6-8 weeks and removable Locator-retained overdentures were placed within 2 weeks of l…
Balance with logic-measuring the performance and sustainable development efforts of an NPO in rural Ethiopia.
2021
The analysis of performance of Not-for-profit organisations (NPOs) is difficult because there are several objectives and perspectives to NPO performance and accountability, especially if considered sustainably and in long term. This suggests that performance analysis and measurement of NPOs might also involve multiple perspectives, such as in Balanced Scorecard (BSC) or in the Logical Framework (LF) models. This article is a case study of analysing the sustainable development and performance of an NPO in rural Ethiopia. We propose the Logic Balanced Scorecard (LBSC) model that combines elements of BSC and LF. This proposal was preliminarily used and tested in a five-year interventionist acc…
Effectiveness of patient-targeted interventions to increase cancer screening participation in rural areas: A systematic review.
2019
Abstract Background Cancer is a major public health problem worldwide. The GLOBOCAN estimated 18.1 million new cases of cancer and 9.6 million deaths from cancer in 2018. In some of the more frequent cancers, mortality can be significantly reduced through cancer screening programs. Nevertheless, socially disadvantaged groups have difficulties in benefitting from these screening programs, especially rural populations. Objective To identify, characterize and summarize patient-targeted interventions aimed at increasing cancer screening participation among rural populations. Methods An exhaustive literature search was performed in the most relevant bibliographic databases for biomedical researc…
Évaluation, concertation, décision : quelle régulation pour le système éducatif ? Le cas de l'enseignement primaire genevois
2011
Cet article tente de tisser quelques liens entre les notions de science, d'expertise et de décision démocratique en s'inscrivant ainsi dans la problématique développée par Weber (2003) lorsqu'il pose la question du sens de la science dans sa leçon " La profession et la vocation de savant ". Il y adopte la réponse donnée par Tolstoï : " Elle n'a pas de sens parce qu'elle ne peut répondre à la seule question qui importe pour nous, laquelle est de savoir ce que nous devons faire et comment nous devons vivre " (page 90). Sans avoir la prétention d'apporter la contradiction à la réponse de Tolstoï, notre ambition consiste à montrer qu'il a été possible, dans le cadre de l'évaluation de l'enseign…
L'efficacité de la politique des zones d'éducation prioritaire dans les collèges
1994
This paper compares pupils progress along the first two years of middle schools fréquentation, whether these schools are in an E.P.A. or not, initial predictors of attainment being kept under control. In French and mathematics, pupils appear to have slightly weaker gains in E.P.A. than they should have elsewhere. The gap is greater for at risk pupils. E.P.A. seem to have a positive effect on pupils relation to schooling, but not on other attitudes or competenties regarding schoolwork or socialization. The E.P.A. policy effects do vary according to the schools.