Search results for "NETWORKS"

Antecedents of online banking satisfaction and loyalty: empirical evidence from Finland

2009

This study endeavours to contribute to a better understanding of Service Quality (SQ) in online banking by examining the various dimensions related to creating a satisfactory online banking experience. The authors develop a conceptual model and test it with a convenience sample of 183 online banking users. The empirical test of the model finds strong support for the links between perceived security and Perceived Usefulness (PU) and Perceived Ease Of Use (PEOU), reliability and PU and PEOU, between PEOU and satisfaction and finally between satisfaction and loyalty. The study finally provides both theoretical and practical contributions, outlines the main limitations of the study and gives id…

Inter-provider AAA and Billing of VoIP Users with Token-based Method

2007

With the increasing popularity of wireless LAN technology, providers of real-time voice over IP (VoIP) services, known as voice service providers (VSP), are asking for roaming solutions and AAA (Authentication, Authorization and Accounting) methods that allow users to use their services from any available public Internet access network. In this paper we propose an AAA and billing architecture that allows users of VSPs to have access to the Internet from wired and wireless access networks provided by both traditional carriers, such as 3G providers, and wireless local access network (WLAN) providers. We propose a token-based AAA method that allows users of VoIP services to have their VSPs as …

Secure interworking with P2PSIP and IMS

2010

In this paper, we propose a secure system model for interconnection between P2PSIP and IMS domains. The interworking solution is based on P2P-IMS GateWay (PIGW), which acts as a normal peer in P2PSIP network and a 3rd party IMS Application Server (AS) in IMS network. The security is achieved by implementing Chord Secure Proxy (CSP) and enhanced with subjective logic based trust model. We also implement this system model and analyze it in several aspects: number of hops and delay, trust improvement and protection against malicious or compromised intermediate peers. We conclude that the proposed architecture is feasible and improves security. As far as we know our research is the first study …

Trust enhancement of P2PSIP communication systems

2011

Today, peer-to-peer (P2P) session initiation protocol (SIP)-based communication systems have attracted much attention from both academia and industry. The decentralised nature of P2P might provide the distributed P2P communication system without help of the traditional SIP server. However, it comes to the cost of reduced trustworthiness and may cause security problems, e.g., privacy leaks, unpredictable availability, etc. In this paper, we investigate P2PSIP security issues and propose a subjective logic-based trust model that offers trust-based security services during P2PSIP session establishment. The main issues considered in this model include opinion calculation, opinion maintenance, d…

Analysis and Simulation of the Signaling Protocols for the DiffServ Framework

2006

This paper considers signaling protocols for the DiffServ QoS framework. Originally, DiffServ had no standardized signaling solution, which resulted in the static configuration for the DiffServ domain. However, the dynamic allocation of resources within the domain allows to ensure the per-flow QoS guarantees and achieve better performance. At the moment, several signaling solutions for DiffServ framework are available. Thus, it is crucial to analyse these solutions and interconnections between them. In particular, the RSVP, aggregated RSVP, GIST, COPS, and SIP protocols will be considered. The simulation comprises several scenarios that present that the dynamic allocation of resource within…

The Beauty of the Commons? Consumers Participation in Food Community Networks

2012

Why are consumers increasingly joining farmers to co-produce and transact sustainable foods world-wide? May these networks be a new tool to promote sustainable practices? As stated by Sandler (2010): “Longitudinal collective action environmental problems are likely to be effectively addressed only by an enormous number of individuals each making a nearly insignificant contribution to resolving them”. Consumers-farmers networks may serve this scope by inducing individual actors to change their preferences towards sustainable products. However participation in these networks is still not well understood. On one hand new institutional economics explains consumers joining farmers in creating a n…

Plant-animal seed dispersal interactions as key drivers of ecological restoration in a changing world

2022

Many global and European commitments state the need to plant billions of trees and restore millions of hectares of degraded ecosystems to contrast biodiversity loss, desertification and climate change. Seed dispersal is a crucial process promoting vegetation dynamics, and in the Mediterranean, up to 65% of woody plant species need animals for seed dispersal. Therefore, such mutualistic ecological interaction represents a key nature-based solution to help us reaching our commitments. In this presentation first we will report the strong expansion rate and correlated finescale spatio-temporal patterns of woody natural regeneration over a pastureland, using a spatially-explicit framework deploy…

Fullerene-Polymers: Synthesis, Properties and Applications

2009

Written by an outstanding team of experts in the interdisciplinary areas of research, this book is based on a new classification of the different types of fullerene polymers according to their chemical structures. It covers all aspects, from different classes, to their synthesis and applications in material science. Of great interest to polymer and synthetic chemists, but also for material scientists and industrial chemists.

Predicting Real-Time Roadside CO and NO2 Concentrations using Neural Networks

2008

Prediction of concrete materials compressive strength using surrogate models

2022

Using soft computing methods could be of great interest in predicting the compressive strength of Ultra-High-Performance Fibre Reinforced Concrete (UHPFRC). Therefore, this study developed four soft computing techniques. The models are the Linear- relationship (LR), pure quadratic, M5P-tree (M5P), and artificial neural network (ANN). The models were trained and developed using 306 datasets comprising 11 input parameters, including the curing temperature (T), the water-to-cement ratio (w/c), silica fume (SF), cement content (C), fiber content (Fb), water (W), sand content (S), superplasticizer (SP), fiber aspect ratio (AR) and curing time (t). Experimental results were used and compared to t…