Coordination fiable de services de données à base de politiques actives

We propose an approach for adding non-functional properties (exception handling, atomicity, security, persistence) to services' coordinations. The approach is based on an Active Policy Model (AP Model) for representing services' coordinations with non-functional properties as a collection of types. In our model, a services' coordination is represented as a workflow composed of an ordered set of activities, each activity in charge of implementing a call to a service' operation. We use the type Activity for representing a workflow and its components (i.e., the workflow' activities and the order among them). A non-functional property is represented as one or several Active Policy types, each policy composed of a set of event-condition-action rules in charge of implementing an aspect of the property. Instances of active policy and activity types are considered in the model as entities that can be executed. We use the Execution Unit type for representing them as entities that go through a series of states at runtime. When an active policy is associated to one or several execution units, its rules verify whether each unit respects the implemented non-functional property by evaluating their conditions over their execution unit state, and when the property is not verified, the rules execute their actions for enforcing the property at runtime. We also proposed a proof of concept Active Policy Execution Engine for executing an active policy oriented workflow modelled using our AP Model. The engine implements an execution model that determines how AP, Rule and Activity instances interact among each other for adding non-functional properties (NFPs) to a workflow at execution time. We validated the AP Model and the Active Policy Execution Engine by defining active policy types for addressing exception handling, atomicity, state management, persistency and authentication properties. These active policy types were used for implementing reliable service oriented applications, and mashups for integrating data from services.Nous proposons une approche pour ajouter des propriétés non-fonctionnelles (traitement d'exceptions, atomicité, sécurité, persistance) à des coordinations de services. L'approche est basée sur un Modèle de Politiques Actives (AP Model) pour représenter les coordinations de services avec des propriétés non-fonctionnelles comme une collection de types. Dans notre modèle, une coordination de services est représentée comme un workflow compose d'un ensemble ordonné d'activité. Chaque activité est en charge d'implante un appel à l'opération d'un service. Nous utilisons le type Activité pour représenter le workflow et ses composants (c-à-d, les activités du workflow et l'ordre entre eux). Une propriété non-fonctionnelle est représentée comme un ou plusieurs types de politiques actives, chaque politique est compose d'un ensemble de règles événement-condition-action qui implantent un aspect d'un propriété. Les instances des entités du modèle, politique active et activité peuvent être exécutées. Nous utilisons le type unité d'exécution pour les représenter comme des entités dont l'exécution passe par des différents états d'exécution en exécution. Lorsqu'une politique active est associée à une ou plusieurs unités d'exécution, les règles vérifient si l'unité d'exécution respecte la propriété non-fonctionnelle implantée en évaluant leurs conditions sur leurs états d'exécution. Lorsqu'une propriété n'est pas vérifiée, les règles exécutant leurs actions pour renforcer les propriétés en cours d'exécution. Nous avons aussi proposé un Moteur d'exécution de politiques actives pour exécuter un workflow orientés politiques actives modélisé en utilisant notre AP Model. Le moteur implante un modèle d'exécution qui détermine comment les instances d'une AP, une règle et une activité interagissent entre elles pour ajouter des propriétés non-fonctionnelles (NFP) à un workflow en cours d'exécution. Nous avons validé le modèle AP et le moteur d'exécution de politiques actives en définissant des types de politiques actives pour adresser le traitement d'exceptions, l'atomicité, le traitement d'état, la persistance et l'authentification. Ces types de politiques actives ont été utilisés pour implanter des applications à base de services fiables, et pour intégrer les données fournies par des services à travers des mashups

Whose Responsibility is it Anyway? Accountability and Standpoints for Disaster Risk Reduction in Nepal

Generalisation, universal knowledge claims, and recommendations within disaster studies are problematic because they lead to miscommunication and the misapplication of actionable knowledge. The consequences and impacts thereof are not often considered by experts; forgone as irrelevant to the academic division of labour. There is a disconnect between expert assertions for disaster risk reduction (DRR) and their practical suitability for laypersons. Experts currently assert independently of the context within which protective action measures (PAMs) are to be used, measures unconnected to the people for whom they are developed. This has knock-on effects for DRR: much expert-generated science and policy remains unused, unimplemented, and sometimes misapplied. I use philosophical accounts of assertion and epistemic blame to highlight the epistemic relationship between experts and laypersons. This relationship includes responsibilities and agreements between epistemic agents. Since multilevel DRR knowledge still transfers top-down from experts to laypersons, if experts impair the epistemic relationship, they can be held epistemically blameworthy. To address the pervasiveness of top-down systems, I analyse the epistemic framings and narratives currently shaping DRR, and more specifically PAMs and campaigns. I deconstruct universal perspectives that dominate the epistemic processes of generating, disseminating, and implementing DRR knowledge and specifically for co-seismic landslide PAMs for Nepal. I argue for more inclusive, contextual, and epistemically responsible DRR. Co-production of knowledge should begin from the standpoints of marginalised persons who may have an epistemic advantage due to their socio-politically marginalised positions. Often these epistemic contributions are left out of DRR efforts because marginalised persons are rarely afforded equal, if any, epistemic agency, which results in epistemic gaps and a large pool of relevant knowledge remaining unincorporated and unused in DRR research and policy

IN THE BUTTERNUT BIG TIME: FOOD HUBS, FARMERS, AND THE DEVELOPMENT OF COMMUNITY AGRO-FOOD ECONOMIES

Food hubs, a new model of values-based agro-food enterprise, are promoted by their advocates as a means to simultaneously improve the livelihoods of small and mid-sized farmers, increase the social and environmental sustainability of the food system, and supply the ever increasing consumer demand for health, local food. Noting the contradictions embedded in the promise of simultaneously generating both social values and economic value, this study explores how goals of promoting positive social, economic, or environmental change are achieved and/or inhibited when implemented though marketbased activities. Through a series of three in-depth case studies of food hubs in the Southeastern United States, the three papers compiled in this dissertation investigate how food hubs work to realize abstract non-financial goals (e.g. ‘helping family farmers’, ‘promoting sustainable food systems’) through the mundane work of food aggregation and distribution. Particular attention is paid to the experiences of mid-sized farmers who participate in food hubs, and the historic, material, and subjective processes that influence the development of food hubs and their many stakeholders. Highlighting the tensions and negotiations inherent to the hybrid social-and-monetary work of food hubs, I assert the need for an analytical framework that can account for the more-than-financial dimensions of economic and ethical praxis. To that end, I draw on the theories of J.K. Gibson-Graham to suggest that food hubs are best understood as a form of post-capitalist enterprise situated within a community agro-food economy, wherein reciprocal and interdependent relationships are forged between new economic subjects through deliberate and ongoing negotiation of care via the process and outcomes of diverse economic activity

Building a Culture of Equity, Diversity, Inclusion and Social Justice at a Community College

Over the past number of years, it has become apparent that Canada is facing a significant skilled labour shortage. As the world emerges from the Covid-19 pandemic, the pressure to train and hire skilled trades workers has only increased; in order to fill the growing labour gap, intentional measures are needed to attract and retain a more diverse group of students. This organizational improvement plan aims to capitalize on a recent strategic plan and its central commitment to equity, diversity, inclusion and social justice. Through a case study focused on balanced enrolment by gender in trades training, this document considers a number of potential solutions before focusing on policies and practices related to recruitment, application, and admission of women into two trades programs. Principles of transformational leadership and transformative leadership theory are entwined with a change roadmap and a change process of appreciative inquiry to create a matrix for change at College on the Water (a pseudonym). A project community map is created and key responsibilities are outlined, as are the critical elements of a communication plan. Lessons learned from this case study can be applied to other programs that are inequitable in representation, whether by gender, socioeconomic status, race, or other differentiation. The immediate goal is to ameliorate an imbalance in student enrolment, and the larger goal is to help the institution’s social justice focus and responsibilities progress. To this end, a global benchmarking tool will be used to measure the institution’s current state and to set a pathway for a better future

Pre-deployment training of UN women military peacekeepers: a case study analysis of three south-east Asian countries

The purpose of this study is to examine the role and impact that uniformed women play in UN peacekeeping operations, and to further establish how appropriate pre-deployment training (PDT) supports the performance of women in operational zones. The research questions posed are ‘whether women make a difference to peacekeeping operations’ and ‘to what extent PDT enables them to do so’. To answer these questions, the thesis takes a two-pronged approach. Firstly, a literature search evaluates the nature of uniformed women’s participation in UN peacekeeping missions, their contribution to effective peacekeeping and the UN policies supporting women’s participation in its missions. The main resources accessed for the literature research are the UN and contributing countries’ official policies, publication and reports. Secondly, primary data were acquired through field research on the training needs of three Southeast Asian countries, namely Indonesia, the Philippines and Country A. Across these sample states, empirical research data was gathered through in-depth semi-structured interviews with 37 female peacekeepers, 17 trainers and seven decision-makers. The literature reveals that women participate in UN peacekeeping missions in two ways, those that form part of a contingent and others that act as individual military experts, observers or staff officers. Women make a difference by allowing a UN mission to have greater reach to the local community, especially to the female population in segregated communities, including the survivors of sexual- and gender-based violence. The field research also reveals that the three Southeast Asian country case studies provide different PDT to their personnel, although the UN provides standardised training materials. Interview data from all three countries indicate that women and men receive combined PDT training, with the majority of the respondents arguing that there is no need for segregated gender training. However, they endorse differentiated training for specialist skills, such as for mentoring teams by same sex members to discuss biological and logistical issues in deployment, including, for instance, the best strategy for ensuring continuity in the supply of women’s sanitary requirements. Not all the three sample countries support uniformed women deployment on par with male peacekeeper deployment, and rarely support women holding leadership positions, due to discrimination in military education access, limitations on human resources and apprehension at putting women into dangerous positions. Such constraints limit the roles that women can play in UN field missions

Global and Personal: Exploring study abroad participants' communication of their experiences in an online global education program

The number of American undergraduate students participating in study abroad programs is increasing annually. Educators, questioning the quality and impact of students’ learning and their inability to articulate experiences while abroad, have looked to improve intercultural communication. Reflection is frequently recommended as a pedagogical tool to help students examine and connect their experiences to larger ideas of culture, society, and globalization. However, there are few examples in research literature of study abroad students’ written reflection to different audiences and in digital contexts. This study explored how undergraduate students wrote about their study abroad experiences in a digitally mediated, pedagogical context with young American audiences from underserved backgrounds. It inquired how pedagogically-oriented curriculum did or did not support students’ intercultural learning and processes of reflection. Through document analysis and a qualitative survey of 30 students, and interviews with seven key informants, the study analyzed the products and processes of reflection and writing. The study found that the undergraduate sojourners represented themselves as travelers who had overcome institutional and socioeconomic barriers in order to pursue their academic and personal goals. Participants wrote about warmth, belonging, and their experiences of receptivity by local people and expressed openness and motivation to write for an authentic audience. A minority of the students wrote from a self-interrogative, implicative perspective where they considered ideas of privilege and critically examined cultural norms. Similarly, a small number questioned the content of the curriculum and tone of their writing, perhaps because of the curricular constraints and presentation of the positive benefits of learning through travel. Overall, the structure of the curriculum facilitated students’ communication as thoughtful citizens not just of their local communities, but also of the world, as they considered their audiences, their position as American travelers, and their relationships with local people. The study supports structured and free-form writing to authentic audiences as a tool for cultivating reflection, exploring identity, and making global and local connections in study abroad contexts. It urges educators to reflect on the goals and conditions for cultivating openness to locals and distant audiences and critical awareness of one’s cultural and social identity

Designing hybridization: alternative education strategies for fostering innovation in communication design for the territory

Within the broad context of design studies, Communication Design for the Territory stands as a hybrid discipline constantly interfacing with other fields of knowledge. It assumes the territorial theme as its specific dimension, aiming to generate communication systems capable of reading the stratifications of places. From an educational perspective, teaching activities are closely linked to research and can take on different levels of complexity: from the various forms of cartographic translation to the design of sophisticated transmedia digital systems. In the wake of COVID-19, this discipline has come to terms with a profoundly changed scenario in terms of limited access to the physical space and the emergence of new technologies for remote access. In this unique context, we propose a pedagogical strategy that focuses on the hybridization of communication artifacts with the aim of fostering design experimentation. As a creative tool, hybridization leads to the design of innovative systems by strategically combining the characteristics of different artifacts to achieve specific communication goals. By experimenting with these creative strategies, students are led to critically reflect on existing communication artifacts’ features and explore original designs that deliberately combine different media, contents, and communication languages in innovative ways. Through hybridization, the methods for territorial knowledge production appear more effective, effectively combining the skills and knowledge embodied in multiple subject areas. The paper presents the experience developed in the teaching laboratories of the DCxT (Communication Design for the Territory) research group of the Design Department of Politecnico di Milano. The teaching experience highlights how hybridization strategies can increase the effectiveness in learning about territorial specificities, in acquiring critical knowledge about communication systems, and in developing innovation strategies that allow to influence the evolution of traditional communication models

A comparative analysis of the governance mechanisms in two Centres for Inclusive Living that enhance disabled peoples’ life choices

This study examined disabled people’s access to independent living in Scotland and Norway. At the time of the field work for this research in 2012, the literature revealed no comparable social enquiry combining the concepts of citizenship, independent living and governance. Within disability studies, independent living denotes a perspective that recognises the interconnected nature of life areas that affect lived experiences of disablement and inclusion of disabled citizens. From the independent living movement, Centres for Inclusive Living emerged as unique governance structures with full service-user involvement and run by disabled people for disabled people. This study focused upon to what extent the organisational governance structures in the Glasgow Centre for Inclusive Living (GCIL) and Uloba Centre for Independent Living (Uloba) in Norway facilitate or impede disabled people’s access to independent living. The methodology adopted a mixed methods approach. The central method involved organisational case studies with GCIL and Uloba. This enabled an in-depth qualitative exploration through semi-structured interviews with the case study employees, service-user/co-owners and key experts within each country. In addition, an online survey was distributed to other organisations that operated within the disability field. The analytical framework used an integration of the social relational model of disability (Thomas, 1999) and meso level governance analysis (Lowe, 2004). The social relational model of disability provided structural (macro) and agency (micro) level interpretations and an emphasis on psychosocial elements of disability. It also enabled the synergy of a theory of impairment alongside a theory of disability. Meso (organisational) governance analysis focused attention on the connections between organisations in society. This focus revealed the lateral relationships with other meso level bodies, macro institutions and micro individual action. Research participants prioritised the areas of peer support, accessible housing and personal assistance. Peer support was found to take both informal and formal manifestations and acted as a foundation for the other two areas of independent living. The findings highlighted that Centres for Inclusive Living provide facilitation for access to independent living across macro, meso and micro tiers of society. In particular, empowerment, peer support and user led governance formed key strategies that enhanced disabled people’s access to independent living in Scotland and Norway

Secure, Efficient and Privacy-aware Framework for Unstructured Peer-to-Peer Networks

Recently, the advances in Ubiquitous Computing networks and the increased computational power of network devices have led designers to create more flexible distributed network models using decentralised network management systems. Security, resilience and privacy issues within such distributed systems become more complicated while important tasks such as routing, service access and state management become increasingly challenging. Low-level protocols over ubiquitous decentralised systems, which provide autonomy to network nodes, have replaced the traditional client-server arrangements in centralised systems. Small World networks represent a model that addresses many existing challenges within Ubiquitous Computing networks. Therefore, it is imperative to study the properties of Small World networks to help understanding, modelling and improving the performance, usability and resiliency of Ubiquitous Computing networks. Using the network infrastructure and trusted relationships in the Small World networks, this work proposes a framework to enhance security, resilience and trust within scalable Peer-to-Peer (P2P) networks. The proposed framework consists of three major components namely network-aware topology construction, anonymous global communication using community trust, and efficient search and broadcasting based on granularity and pro-active membership management. We utilise the clustering co-efficient and conditional preferential attachment to propose a novel topology construction scheme that organises nodes into groups of trusted users to improve scalability. Network nodes communicate locally without advertising node identity at a global scale, which ensures user anonymity. The global communication is organised and facilitated by Service Centres to maintain security, privacy and integrity of member nodes. Service Centres are allocated using a novel leader election mechanism within unstructured scalable P2P networks. This allows providing fair and equitable access for existing and new nodes without having to make complex changes to the network topology. Moreover, the scale-free and clustering co-efficient characteristics of Small World networks help organising the network layout to maintain its balance in terms of the nodes distribution. Simulation results show that the proposed framework ensures better scalability and membership management in unstructured P2P networks, and improves the performance of the search and broadcasting in terms of the average shortest path and control overhead while maintaining user anonymity and system resiliency