The problem of reliably transferring data from a set of NP producers to a set of NC consumers in the BAR model, named N-party BAR Transfer (NBART), is an important building block for volunteer computing systems. An algorithm to solve this problem in synchronous systems, which provides a Nash equilibrium, has been presented in previous work. In this paper, we propose an NBART algorithm for async...

The objective of this study is to estimate associations between social capital and health when other factors are controlled for. Data from the standard-of-living survey by Statistics Norway are merged with data from several other sources. The merged files combine data at the individual level with data that describe indicators of community-level social capital related to each person's county of ...

In this paper we consider the approach to solving the problem of search for systems of diagonal orthogonal Latin squares in the form of the Boolean Satisfiability problem. We describe two different propositional encodings that we use. The first encoding is constructed for finding pairs of orthogonal diagonal Latin squares of order 10. Using this encoding we managed to find 17 previously unknown...

OBJECTIVE To analyze the profile of volunteers and their work process in hospital humanization. METHODOLOGICAL PROCEDURES The following instruments were used: a sociodemographic questionnaire and a semi-structured interview, applied to 26 volunteer coordinators and 26 volunteers, who belong to 25 hospitals in the metropolitan area of São Paulo, Southeastern Brazil, between 2008 and 2009. Inte...

Highly motivated volunteers can greatly extend organizational andprogrammatic outreach to involve audiences which may otherwise be unserved. Determining what motivates individuals to volunteer is a key component of volunteer administration. The purpose of this study was to identify the motivators of adult volunteer 4-H Leaders and to determine if positive and negative motivations were similar f...

Technology becomes more and more advanced everyday, both from the software and from the hardware perspective. Brand new devices, more powerful and capable of the generation preceding them, are steadily released. Everybody owns laptops, smartphones and many other devices with great compute capabilities, able to easily solve problems a few years ago considered almost impossible. These devices are...

Since the 1990s, the number of personal computing devices has exploded. Today we collectively own billions of devices whose computing resources are underused the majority of the time. These resources are either time-consuming to leverage or not supported by othermainstream distributed computing approaches. We propose to revisit volunteer computing, where volunteers from around the world contrib...

Volunteer computing is a form of distributed computing where projects attempt to accomplish some goal, using volunteered computational resources instead of paying for the resources [1]. Volunteer computing projects are being used for a wide range of computationally intensive scientific and mathematical goals, ranging from searching for evidence of extraterrestrial intelligence to searching for ...

While both volunteer computing and social networks have proved successful, the merging of these two models is a new field: Social Volunteer Computing. A Social Volunteer Computing system utilizes the relationships within a social network to determine how computational resources flow towards tasks that need to be completed, and the results of these computations are added back into the social net...