Epcast: Controlled Dissemination in Human-based Wireless Networks by means of Epidemic Spreading Models

Epidemics-inspired techniques have received huge attention in recent years from the distributed systems and networking communities. These algorithms and protocols rely on probabilistic message replication and redundancy to ensure reliable communication. Moreover, they have been successfully exploited to support group communication in distributed systems, broadcasting, multicasting and information dissemination in fixed and mobile networks. However, in most of the existing work, the probability of infection is determined heuristically, without relying on any analytical model. This often leads to unnecessarily high transmission overheads. In this paper we show that models of epidemic spreading in complex networks can be applied to the problem of tuning and controlling the dissemination of information in wireless ad hoc networks composed of devices carried by individuals, i.e., human-based networks. The novelty of our idea resides in the evaluation and exploitation of the structure of the underlying human network for the automatic tuning of the dissemination process in order to improve the protocol performance. We evaluate the results using synthetic mobility models and real human contacts traces

Frugal innovation for healthcare: strategies and tools for the identification and evaluation of frugal and reverse innovations in healthcare

Global healthcare systems are united by their desire to widen patient access to safe and effective clinical services in the face of increasing demand and financial constraints. In low- and middle-income countries (LMICs), a variety of ingenious product and process solutions, termed frugal innovations, have been able to deliver services at a fraction of the cost. It is the broad proposition of this work that such ideas could be applicable to high-income countries (HICs), a concept labeled reverse innovation. Using a conceptual model of innovation scouting derived from the causal mechanism of critical realism, this work examined the development and testing of a tool to deductively identify frugal innovations in healthcare (FIH-ID tool) and then evaluated methodology to assess the reversibility of potential of frugal innovations. The FIH-ID tool demonstrated consistently acceptable inter-rater reliability scores using different methods of application and different raters, moreover, construct validity was shown by its ability to identify well-known frugal innovations. With respect to the assessment of the reversibility potential, the results of the present study highlighted the challenges of undertaking such a complex evaluation process using a simple scoring system. Raters achieved poor levels of inter-rater reliability and only 2 innovations were thought likely to reverse to a HIC. This study presents the first application of a critical realist approach to innovation scouting. It has identified a cohort of 76 potential frugal innovations in healthcare suggesting that the FIH-ID tool is likely to be a valuable asset for similar studies in the future. It has highlighted the challenges of assessing the reversibility potential of innovations from LMICs. It has documented the emergence of the global innovation curator, entities that seek to identify, curate and promote innovations from LMICs, and it proposes a conceptual model for the role of global innovation curators in the diffusion of innovation.Open Acces

Mobile Online Gaming via Resource Sharing

Mobile gaming presents a number of main issues which remain open. These are concerned mainly with connectivity, computational capacities, memory and battery constraints. In this paper, we discuss the design of a fully distributed approach for the support of mobile Multiplayer Online Games (MOGs). In mobile environments, several features might be exploited to enable resource sharing among multiple devices / game consoles owned by different mobile users. We show the advantages of trading computing / networking facilities among mobile players. This operation mode opens a wide number of interesting sharing scenarios, thus promoting the deployment of novel mobile online games. In particular, once mobile nodes make their resource available for the community, it becomes possible to distribute the software modules that compose the game engine. This allows to distribute the workload for the game advancement management. We claim that resource sharing is in unison with the idea of ludic activity that is behind MOGs. Hence, such schemes can be profitably employed in these contexts.Comment: Proceedings of 3nd ICST/CREATE-NET Workshop on DIstributed SImulation and Online gaming (DISIO 2012). In conjunction with SIMUTools 2012. Desenzano, Italy, March 2012. ISBN: 978-1-936968-47-

Frugal Mobile Objects

This paper presents a computing model for resource-limited mobile devices. The originality of the model lies in the integration of a strongly-typed event-based communication paradigm with abstractions for frugal control, assuming a small footprint runtime. With our model, an application consists of a set of distributed reactive objects, called FROBs, that communicate through typed events and dynamically adapt their behavior reacting to notifications typically based on resource availability. FROBs have a logical time-slicing execution pattern that helps monitor resource consuming tasks and determine resource profiles in terms of CPU, memory, and bandwidth. The behavior of a FROB is represented by a set of stateless first-class objects. Both state and behavioral objects are referenced through a level of indirection within the FROB. This facilitates the dynamic changes of the set of event types a FROB can accept, say based on the available resources, without requiring a significant footprint of the underlying FROB runtime. We demonstrate the usability of the FROB model through our Java-based prototype and a peer-to-peer audio streaming scenario where an audio provider dynamically adjusts its quality of service by adapting to demand. The performance results of our prototype convey the small footprint of our FROB runtime (86 kilobytes). We also augmented the KVM to enable resource profiling with however a negligible overhead (less than 0.5%) and a decrease in speed of the virtual machine of at most 7%

Modelagem da intenção empreendedora como preditora da inovação frugal em estudantes universitários

This study aimed to analyze the influence of entrepreneurial intention (EI) on the frugal innovation (FI) dimensions: open innovation (OI), sustainable innovation (SI), cost innovation (CI) and product innovation (PI), in the university context under the students’ perception. The quantitative approach and structural equation modeling (SEM) was used for a sample of 694 undergraduate students at a Brazilian university. The analyzes confirmed a positive relationship between entrepreneurial intention and open innovation (H1); entrepreneurial intention and sustainable innovation (H2); entrepreneurial intention and cost innovation (H3); entrepreneurial intention and product innovation (H4). Thus, it was found that EI-FI is useful to demonstrate the degree that the student intends to undertake in a future moment, guided by the low cost technologies (CI) process, listed in new social and institutional structures (OI), which insert quality products and services (PI), using fewer resources (SI). As limitations, it is considered the lack of behavioral studies on the intention to undertake innovations, mainly in frugal innovations. Finally, it is recommended to carry out theoretical studies that contribute to the conceptualization, terminologies and attributes of frugal innovations.Este estudo teve como objetivo analisar a influência da intenção empreendedora nas dimensões de inovação frugal: inovação aberta, inovação sustentável, inovação de custos e inovação de produtos, no contexto universitário sob a percepção de alunos de graduação. Utilizou-se a abordagem quantitativa e modelagem de equações estruturais para uma amostra de 694 estudantes de graduação em uma universidade brasileira. As análises confirmaram uma relação positiva entre a intenção empreendedora e a inovação aberta (H1); intenção empreendedora e inovação sustentável (H2); intenção empreendedora e inovação em custo (H3); intenção empreendedora e inovação de produtos (H4). Assim, constatou-se que a relação intenção empreendedora com inovação frugal é útil para demonstrar o grau que o estudante tem a firme intenção de empreender em um momento futuro, direcionado pelo processo de tecnologias de baixo custo, elencadas a novas estruturas sociais e institucionais, que inserem produtos e serviços de qualidade, utilizando menos recursos. Enquanto limitações, considera-se a falta de estudos comportamentais sobre a intenção de empreender em inovações, principalmente em inovações frugais. Por fim, recomenda-se a realização de estudos teóricos que contribuam para a conceituação, terminologias e atributos de inovações frugais

Entrepreneurship through Bricolage. A Study of Displaced Entrepreneurs at Times of War and Conflict

War and conflict brings about adverse changes for those who are displaced. How do entrepreneurial individuals respond to such adversity to either set-up, or continue with their existing entrepreneurial endeavours that would improve their own livelihood or that of others who have been affected? Whilst previous studies have found local knowledge, networks and resources to be crucial in the development of ventures in the war and conflict context, alienation from mainstream society within the host location often means that to succeed, those who are displaced require alternative strategies and approaches. Through examining the entrepreneurship ventures of six internally displaced entrepreneurs in Pakistan, our study identifies that entrepreneurial individuals find different ways to adapt to the new order, with both internal and external bricolage becoming the key strategies deployed to either re-establish their previous business(es) or to develop new endeavour(s) in the host location. To compensate for lack of local knowledge, networks and resources, we found that entrepreneurs followed closely their previous paths in their bricolage attempts, relying on reconfigurations of their pre-existing competencies, as well as utilising pre-established and clandestine networks

ICT-based Social Innovation in Africa: the case of Rwanda

Information and Communication Technology (ICT) in Sub-Saharan Africa has raised attention for its potential to foster multidimensional development. The rationale for ‘ICT for Development’ (ICT4D) revolves around Africa’s prospects to leapfrog to the digital economy amidst the 4th Industrial Revolution. This thesis reflects on the tech-based initiatives stemming from the African continent through the lens of “Social Innovation”. In other words, ICT-based applications whose primary goal is to tackle social challenges. Related tech products and services are seen as a ‘disruptive’ vehicle to address Africa’s need for ‘Homegrown Solutions’ to regional problems. They are context-specific and tailor-made to local realities. The conditions that foster the creation of impact-driven ICT innovation vary widely among African countries. The continent illustrates diverse ‘innovation ecosystems’ and ‘innovation cultures’. Nevertheless, there is a knowledge gap on how social innovation can be deliberately planned at large scale, and thus on how it translates into a practical formal strategy in contemporary African societies. This study examines Rwanda as a distinct case of African ICT-Based social innovation, that effectively manages to plan ICT-based Social Innovation as a state-led, formal practice. Embarking from the devastating 1994 genocide, Rwanda placed ICT at the forefront and formed a global “success story” of recovery and redevelopment. Presently, ICT Innovation is a cross-cutting force in Rwanda’s development agenda, serving the country’s complex socio-cultural context and macroeconomic particularities. Therefore, social innovation is policy-oriented and serves a long-term vision. The study investigates Rwanda’s approaches to reinforce ICT-based social innovation, by creating a conducive social innovation ecosystem and an innovation culture. It reviews strategies and practical initiatives that Rwanda employs for public mobilization and capacity-building and maps the conditions that enable social innovation to grow in Rwanda. The research conducted a preparatory document review of policies and strategies to outline Rwanda’s key priorities in ICT Innovation and ICT4D. Sequentially, the data collection used in-depth, semi-structured interviews with key informants in Rwanda. The thesis is exploratory and aims to identify key areas for further investigation. Results showed that the government’s openness to innovation and experimentation create a sense of shared purpose for innovation actors. The government designs tailor-made programs and campaigns directed to both users and innovators and establishes flagship regional initiatives that combine local and global approaches. Social innovation is enabled by a wide range of factors, notably sociocultural features, strong political will, the conducive business climate, Rwanda’s tech-based and market-driven development model, and Rwanda’s regional role as an ICT Hub in Africa. Perhaps more strikingly, visionary leadership and political championship enable the incremental growth of innovation. Rwanda’s social innovation ecosystem is supportive, synergetic and provides diversified opportunities for capacity-building and growth, whilst the innovation culture integrates cultural and traditional values in entrepreneurial ventures. Nevertheless, social innovation is a work in progress with challenges concerning finance, human resources, or adoption. Rwanda’s strategies are no fixed-recipe, but bring intriguing implications on how customized planning instruments can shape the conditions for social innovation to emerge

Middleware support for delay-tolerant service provision in disconnected mobile ad hoc networks

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