Search results for "ISM [radio continuum]"

The role of the Access Point in Wi-Fi networks with selfish nodes

2009

In Wi-Fi networks, mobile nodes compete for accessing the shared channel by means of a random access protocol called Distributed Coordination Function (DCF), which is long term fair. But recent drivers allow users to configure protocol parameters differently from their standard values in order to break the protocol fairness and obtain a larger share of the available bandwidth at the expense of other users. This motivates a game theoretical analysis of DCF. Previous studies have already modeled access to a shared wireless channel in terms of non-cooperative games among the nodes, but they have mainly considered ad hoc mode operation. In this paper we consider the role of the Access Point (AP…

Resource sharing optimality in WiFi infrastructure networks

2009

In WiFi networks, mobile nodes compete for accessing a shared channel by means of a random access protocol called Distributed Coordination Function (DCF). Although this protocol is in principle fair, since all the stations have the same probability to transmit on the channel, it has been shown that unfair behaviors may emerge in actual networking scenarios. Assuming that a contending node can dynamically change its strategy, by tuning its contention parameters to non-standard values on the basis of channel observations, we prove that, for infrastructure networks with bidirectional traffic and homogeneous application requirements, selfish access strategies are able to reach equilibrium condi…

2021

Recent studies on the economic dimensions of sports and physical activity in Germany have revealed that sport-related tourism is one of the important contributors to private household consumption. Due to a lack of representative and large-scale data sets, this topic has never been displayed in detail before. By using computer assisted telephone and web interviews, we collected a total data set of n=19,396 persons living in Germany. The expenditures for active sport tourism were isolated, which is understood as travelling to take part in different sporting activities. Data are provided on the overall spending of German households for sport trips, with skiing (€ 3.4 bn) and scuba diving (€ 2.…

Is participation in the tourism market an opportunity for everyone? Some evidence from Italy

2016

This paper investigates whether there are differences in tourism consumption behaviour among families by analysing the main determinants of tourism participation at national and international levels. In particular, it explores whether tourism is becoming part of the lifestyle of Italians or whether it is still a luxury good only for the privileged. A Heckman model was used on micro-data on Italian family expenditure over the period 1997–2007, and an income elasticity analysis for different personal and household characteristics was carried out. The results show that participation in the tourism market is strongly affected by the personal characteristics of individuals and that tourism cons…

"La pura superficie" e la traslazione

2018

The article is a reading of the collected poems by Guido Mazzoni "La pura superficie" (Donzelli 2017)

Costruzioni discorsive sull’Europa e sui rapporti tra continenti nell’antichità greca

2019

L’articolo studia le retoriche cui sono state sottoposte le identità rappresentate dai continenti. Viene mostrato così che la mitica parentela originaria ha dato luogo ora ad un legame di solidarietà tra i popoli che occupano l’una o l’altra zona geografica, ora ad una giustificazione delle pretese imperialistiche di un popolo su un altro. Si mostra altresì che i confini tra i continenti vengono presentati, a seconda del punto di vista difensivo o aggressivo da cui se ne parla, ora come segni di una ‘architettura’ naturale di cui si pretende il rispetto, ora come ostacoli da superare in nome dell’amore della conoscenza che vuole esplorare l’ignoto o dell’addomesticamento di ciò che è selvag…

Διαλεκτικές κατασκευές για την Ευρώπη και για τις σχέσεις ανάμεσα σε ηπείρους στην ελληνική αρχαιότητα

2020

L’articolo studia le retoriche cui sono state sottoposte le identità rappresentate dai continenti. Viene mostrato così che la mitica parentela originaria ha dato luogo ora ad un legame di solidarietà tra i popoli che occupano l’una o l’altra zona geografica, ora ad una giustificazione delle pretese imperialistiche di un popolo su un altro. Si mostra altresì che i confini tra i continenti vengono presentati, a seconda del punto di vista difensivo o aggressivo da cui se ne parla, ora come segni di una ‘architettura’ naturale di cui si pretende il rispetto, ora come ostacoli da superare in nome dell’amore della conoscenza che vuole esplorare l’ignoto o dell’addomesticamento di ciò che è selvag…

Taylor on Solidarity

2009

After characterizing Taylor’s general approach to the problems of solidarity, we distinguish and reconstruct three contexts of solidarity in which this approach is developed: the civic, the socio-economic, and the moral. We argue that Taylor’s distinctive move in each of these contexts of solidarity is to claim that the relationship at stake poses normatively justified demands, which are motivationally demanding, but insufficiently motivating on their own. On Taylor’s conception, we need some understanding of extra motivational sources which explain why people do (or would) live up to the exacting demands. Taylor accepts that our self-understanding as members of either particular communiti…

A Hermeneutical Analysis of the InternalistApproachin the Philosophy of Sport

2015

Abstract In this paper, we make a hermeneutical analysis of internalism, the dominant tradition in the philosophy of sports. In order to accomplish this, we identify the prejudices that guide the internalist view of sports, namely the Platonic-Analytic prejudice introduced by Suits, one of the forefathers of internalism. Then, we critically analyze four consequences of following such a prejudice: a) its reductive nature, b) the production of a unrealistic view of sports, c) the vagueness of the idea of excellence; and d) the leap from the descriptive analysis of the sporting phenomenon to the setting of normative requirements for the practice of sports.

Experimenting Through Neuromarketing to Measure the Impact of Spanish Cultural Heritage

2020

This is the continuation of a study based on the traditional image model of destination, formed by the constructions of cognition, emotion, and image. The objective is to study the model through a deconstruction in all forms through the application of neuroscience, a system of structural equations, virtual reality, and the Spanish architectural and cultural heritage as a stimulus. Variables were studied with an electroencephalogram through brain bioelectric wave responses, alpha and beta. The deconstruction of the image model consists of evaluating the hypotheses of the traditional image model of the destination in all its possible forms, giving rise to 3 models. Model 1. When cognition is …