A concept of weighted connectivity on connected graphs

The introduction of a {0,1}-valued game associated to a connected graph allows us to assign to each node a value of weighted connectivity to the different solutions that for the cooperative games are obtained by means of the semivalues. The marginal contributions of each node to the coalitions differentiate an active connectivity from another reactive connectivity, according to whether the node is essential to obtain the connection or it is the obstacle for the connection between the nodes in the coalition. Diverse properties of this concept of connectivity can be derived.Peer ReviewedPostprint (author’s final draft

Separability by semivalues modified for games with coalition structure

The original publication is available at www.rairo-ro.orgTwo games are inseparable by semivalues if both games obtain the same allocation whatever semivalue is considered. The problem of separability by semivalues reduces to separability from the null game. For four or more players, the vector subspace of games inseparable from the null game by semivalues contains games different to zero-game. Now, for five or more players, the consideration of a priori coalition blocks in the player set allows us to reduce in a significant way the dimension of the vector subspace of games inseparable from the null game. For these subspaces we provide basis formed by games of a particular type.Postprint (published version

A Simple and Robust Dissemination Protocol for VANETs

Several promising applications for Vehicular Ad-hoc Networks (VANETs) exist. For most of these applications, the communication among vehicles is envisioned to be based on the broadcasting of messages. This is due to the inherent highly mobile environment and importance of these messages to vehicles nearby. To deal with broadcast communication, dissemination protocols must be defined in such a way as to (i) prevent the so-called broadcast storm problem in dense networks and (ii) deal with disconnected networks in sparse topologies. In this paper, we present a Simple and Robust Dissemination (SRD) protocol that deals with these requirements in both sparse and dense networks. Its novelty lies in its simplicity and robustness. Simplicity is achieved by considering only two states (cluster tail and non- tail) for a vehicle. Robustness is achieved by assigning message delivery responsibility to multiple vehicles in sparse networks. Our simulation results show that SRD achieves high delivery ratio and low end-to-end delay under diverse traffic conditions

On the economic effects of a res local industry deployment in Morocco: A case of study defining scenarios from a survey to stakeholders

The aim of this article is to simulate the economic impact on Gross Domestic Product (GDP) and employment of renewable energy sources investment in Morocco over the next 40 years. In this sense, several potential scenarios of energy component evolution have been used based on the results of a specific survey to sector stakeholders. We obtain accurate results, avoiding speculative/theoretical assumptions in terms of scenario design. As usual in the sector, a Dynamic Input-Output Model (DI-O) is used to estimate the direct and indirect effects of such a large investment and, avoiding the criticism of this type of model in the context of long-term simulations, the alternative of de Arce et al. (2012) is used. In this framework, substantial results derive from the three scenarios considered: the increase in Moroccan GDP as a result of this investment could be around 1.2-1.7 points and, on average, 42,000 new jobs could be created

Green approach to the Isosorbide Conversion into Dimethyl isosorbide

Isosorbide is one of the most promising products derived from sorbitol. It has already found many applications, mainly in the polymer industry and medicine, such as isosorbide polycarbonate1 (DURABIO®) and isosorbide nitrates as vasodilator for angina pectoris2. The methylation of the two hydroxyl groups of isosorbide molecule gives rise to the formation of dimethyl isosorbide (DMI), which is a high boiling solvent (235ºC), used in skin care formulations because of its solubilising capacity and performance enhancing of many different topical skin actives3. Currently, DMI synthesis implies the use of methyl halides or dimethyl sulfate. A safer and more environmental benign approach has been proposed by Tundo et al4 by employing dimethylcarbonate (DMC) as both reactant and solvent in the presence of sodium methoxide. In the present work, the synthesis of DMI in an excess of DMC by using a MgAl mixed oxides (MgAlOx), as heterogeneous catalyst, under mild reaction conditions, is proposed.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech. Proyecto Plan Nacional CTQ2015-64226-C3-3-R Fondos FEDE

La docencia en economía social y cooperativas: bases para la innovación educativa en los programas de posgrado europeos

La docencia universitaria en Economía Social y Cooperativas se está consolidando a raíz de los cambios que se dan en el entorno europeo, principalmente en los estudios de postgrado. La Universitat de València, a través del IUDESCOOP, es pionera en la implantación de una titulación de postgrado en este campo, mediante una metodología basada en la enseñanza mixta presencial y a distancia sustentada en el uso de las TIC, con unos fuertes nexos de unión con otras universidades españolas, europeas y latinoamericanas y por las relaciones permanentes que mantiene con profesionales y directivos pertenecientes a estas entidades

Transformative Policies for the Social and Solidarity Economy: The New Generation of Public Policies Fostering the Social Economy in Order to Achieve Sustainable Development Goals. The European and Spanish Cases

The United Nations Agenda 2030 has recognized that Social Economy (SE) entities play an important role in achieving the Sustainable Development Goals (SDG). In order to maximize the impact of the SE, governments have recently deployed new policies regarding these entities. The objective is to understand the context of policy change that has allowed these policies to emerge, their main characteristics and the critical factors in their construction and implementation. Successful policy cases in Europe and Spain have been studied. Qualitative data have been collected through key policy documents, experts, and focus groups. As a main finding, the study shows that this new model of policies exhibits the following features: it focuses on transformative change, follows the public-community partnership governance approach and the mainstream approach in the sense of a broader policy context, and finally, it is innovative in terms of means and of complex systematization of strategies. Di culties in the implementation of the partnership approach, in the deployment of the policy-mainstreaming approach, and in the acceptance of the SE framed by all policymakers, SE representatives, and government sta , and constraints in financial endowment are the main critical factors in the implementation of these policies