Trust model for certificate revocation in Ad hoc networks

In this paper we propose a distributed trust model for certificate revocation in Adhoc networks. The proposed model allows trust to be built over time as the number of interactions between nodes increase. Furthermore, trust in a node is defined not only in terms of its potential for maliciousness, but also in terms of the quality of the service it provides. Trust in nodes where there is little or no history of interactions is determined by recommendations from other nodes. If the nodes in the network are selfish, trust is obtained by an exchange of portfolios. Bayesian networks form the underlying basis for this model

A Survey on Wireless Sensor Network Security

Wireless sensor networks (WSNs) have recently attracted a lot of interest in the research community due their wide range of applications. Due to distributed nature of these networks and their deployment in remote areas, these networks are vulnerable to numerous security threats that can adversely affect their proper functioning. This problem is more critical if the network is deployed for some mission-critical applications such as in a tactical battlefield. Random failure of nodes is also very likely in real-life deployment scenarios. Due to resource constraints in the sensor nodes, traditional security mechanisms with large overhead of computation and communication are infeasible in WSNs. Security in sensor networks is, therefore, a particularly challenging task. This paper discusses the current state of the art in security mechanisms for WSNs. Various types of attacks are discussed and their countermeasures presented. A brief discussion on the future direction of research in WSN security is also included.Comment: 24 pages, 4 figures, 2 table

Participatory action research on climate risk management, Bangladesh

The rural populations of southern Bangladesh are some of the most vulnerable communities in the world to the future impacts of climate change. They are particularly at risk from floods, waterlogged soils, and increasing salinity of both land and water. The objective of this project was to analyze the vulnerability of people in four villages that are experiencing different levels of soil salinity. The study evaluated the strengths and weaknesses of current coping strategies and assessed the potential of an index-based insurance scheme, designed diversification and better information products to improve adaptive capacity

Re-telling, Re-cognition, Re-stitution: Sikh Heritagization in Canada

In Canada, the language and techniques of museums and heritage sites have been adopted and adapted by some immigrant communities to make sense of their place within their new country. For some groups, “heritagization” is a new value, mobilized for diverse purposes. New museums and heritage sites serve as a form of ethnic media, becoming community gathering points, taking on pedagogical roles, enacting citizenship, and enabling strategic assertion of identity in the public sphere. This article explores this enactment of heritage and citizen-membership through a case study, the Sikh Heritage Museum, developed in Abbotsford by Indo-Canadians. Established in 2011 in an historic and still-functioning gurdwara, the museum is an example of a community’s desire to balance inward-looking historical consciousness and community belonging, with outward-looking voice, recognition and acceptance by mainstream Canadian society. The museum has also become a site of tension between top-down and bottom-up initiatives, where amateur and local expressions butt up against professionalized government activities such as the Canadian Historical Recognition Program that seek to insert formal recognition and social inclusion policies. The article considers the effects of this resource and power differential on the museum’s development, and on the sensibilities and practices of immigrant “heritage” and “citizenship” in Canada

Re-telling, Re-cognition, Re-stitution: Sikh Heritagization in Canada

In Canada, the language and techniques of museums and heritage sites have been adopted and adapted by some immigrant communities to make sense of their place within their new country. For some groups, “heritagization” is a new value, mobilized for diverse purposes. New museums and heritage sites serve as a form of ethnic media, becoming community gathering points, taking on pedagogical roles, enacting citizenship, and enabling strategic assertion of identity in the public sphere. This article explores this enactment of heritage and citizen-membership through a case study, the Sikh Heritage Museum, developed in Abbotsford by Indo-Canadians. Established in 2011 in an historic and still-functioning gurdwara, the museum is an example of a community’s desire to balance inward-looking historical consciousness and community belonging, with outward-looking voice, recognition and acceptance by mainstream Canadian society. The museum has also become a site of tension between top-down and bottom-up initiatives, where amateur and local expressions butt up against professionalized government activities such as the Canadian Historical Recognition Program that seek to insert formal recognition and social inclusion policies. The article considers the effects of this resource and power differential on the museum’s development, and on the sensibilities and practices of immigrant “heritage” and “citizenship” in Canada

Documenting the application of the Myanmar Climate-Smart Agriculture Strategy

This paper documents the testimonials of those who implemented the Myanmar Climate-Smart Agriculture Strategy (MCSAS) and accounts of those who experienced its application on the ground. Success stories and challenges in implementing MCSAS were documented. Based on the stakeholder interviews conducted, MCSAS is proven to be a valuable document in guiding the implementation of context-specific climate actions in Myanmar. Nineteen government and NGO programs, four policy documents, and an estimate of one billion USD investments were influenced by MCSAS. Following the MCSAS, the National Climate-Smart Agriculture Center of Yezin Agricultural University was established in 2018. Several projects focusing on farmers, particularly the Climate-Smart Village in the Dry Zone and the Farmer Field School in the Delta Zone, were also studied to understand the depth of the influence of MCSAS. In these cases, climate-smart practices adopted have helped farmers coped with climate change and increased their household incomes. Nevertheless, suggestions were made to further improve the Strategy with more specific actions that could be implemented and the funding options that implementers could pursue. The Strategy also needs to be integrated into the current programs of the government and its contents translated in the local language in a format that local people can understand

Economic analysis of climate change adaptation strategies in selected coastal areas in Indonesia, Philippines and Vietnam

This report is an account of a cross-country study that covered Vietnam, Indonesia and the Philippines. Covering four sites (one each in Indonesia and Vietnam) and two sites in the Philippines, the study documented the impacts of three climate hazards affecting coastal communities, namely typhoon/flooding, coastal erosion and saltwater intrusion. It also analyzed planned adaptation options, which communities and local governments can implement, as well as autonomous responses of households to protect and insure themselves from these hazards. It employed a variety of techniques, ranging from participatory based approaches such as community hazard mapping and Focus Group Discussions (FGDs) to regression techniques, to analyze the impact of climate change and the behavior of affected communities and households