The Paraldor Project

Paraldor is an experiment in bringing the power of categorical languages to lattice QCD computations. Our target language is Aldor, which allows the capture of the mathematical structure of physics directly in the structure of the code using the concepts of categories, domains and their inter-relationships in a way which is not otherwise possible with current popular languages such as Fortran, C, C++ or Java. By writing high level physics code portably in Aldor, and implementing switchable machine dependent high performance back-ends in C or assembler, we gain all the power of categorical languages such as modularity, portability, readability and efficiency.Comment: 4 pages, 2 figures, Lattice 2002 conference proceeding

Implementing Norm-Governed Multi-Agent Systems

The actions and interactions of independently acting agents in a multi-agent system must be managed if the agents are to function effectively in their shared environment. Norms, which define the obligatory, prohibited and permitted actions for an agent to perform, have been suggested as a possible method for regulating the actions of agents. Norms are local rules designed to govern the actions of individual agents whilst also allowing the agents to achieve a coherent global behaviour. However, there appear to be very few instances of norm-governed multi-agent systems beyond theoretical examples. We describe an implementation strategy for allowing autonomous agents to take a set of norms into account when determining their actions. These norms are implemented using directives, which are local rules specifying actions for an agent to perform depending on its current state. Agents using directives are implemented in a simulation test bed, called Sinatra. Using Sinatra, we investigate the ability of directives to manage agent actions. We begin with directives to manage agent interactions. We find that when agents rely on only local rules they will encounter situations where the local rules are unable to achieve the desired global behaviour. We show how a centralised control mechanism can be used to manage agent interactions that are not successfully handled by directives. Controllers, with a global view of the interaction, instruct the individual agents how to act. We also investigate the use of an existing planning tool to implement the resolution mechanism of a controller. We investigate the ability of directives to coordinate the actions of agents in order to achieve a global objective more effectively. Finally, we present a case study of how directives can be used to determine the actions of autonomous mobile robots.Open Acces

Implementing Norms that Govern Non-Dialogical Actions

The governance of open multi-agent systems is particular important since those systems are composed by heterogeneous, autonomous and independently designed agents. Such governance is usually provided by the establishment of norms that regulate the actions of agents. Although there are several approaches that formally describe norms, there are still few of them that propose their implementation. In additions, only one that provides support for implementing norms deals with non-dialogical actions since the others only deal with dialogical actions, i.e., actions that provide the interchange of messages between agents. In this paper we propose the implementation of norms that govern non-dialogical actions by extending one of the approaches that regulate dialogical ones. Non-dialogical actions are not related to the interactions between agents but to tasks executed by agents that characterize, for instance, the access to resources, their commitment to play roles or their movement into environments and organizations

Norm-based and commitment-driven agentification of the Internet of Things

There are no doubts that the Internet-of-Things (IoT) has conquered the ICT industry to the extent that many governments and organizations are already rolling out many anywhere,anytime online services that IoT sustains. However, like any emerging and disruptive technology, multiple obstacles are slowing down IoT practical adoption including the passive nature and privacy invasion of things. This paper examines how to empower things with necessary capabilities that would make them proactive and responsive. This means things can, for instance reach out to collaborative peers, (un)form dynamic communities when necessary, avoid malicious peers, and be “questioned” for their actions. To achieve such empowerment, this paper presents an approach for agentifying things using norms along with commitments that operationalize these norms. Both norms and commitments are specialized into social (i.e., application independent) and business (i.e., application dependent), respectively. Being proactive, things could violate commitments at run-time, which needs to be detected through monitoring. In this paper, thing agentification is illustrated with a case study about missing children and demonstrated with a testbed that uses different IoT-related technologies such as Eclipse Mosquitto broker and Message Queuing Telemetry Transport protocol. Some experiments conducted upon this testbed are also discussed

The Global People landscaping study: intercultural effectiveness in global education partnerships

The Context The Higher Education sector in the UK is experiencing a period of rapid and competitive internationalisation. The market for higher education, at undergraduate and post graduate levels, is now truly global: many potential students can make choices about study destinations between an enormous range of institutions in any of the five continents. The audience for research is also global, with a proliferation of domestic and international journals, a multitude of international conferences in every discipline and widely disseminated international indices, ranking universities in terms of their publication and teaching performance. In particular, the recent growth of the major Asian economies has re-shaped the profile of many UK universities both in the composition of their student bodies and also in the number, nature and importance of their overseas partnerships. This Study It is within this context that the Global People project has been established, with the objective of providing knowledge and resources that will support those in the UK Higher Education sector who work, or wish to work, in international collaborations. Phases 1 and 2 of the eChina Programme (see Section1, Introduction) generated a great deal of learning about managing international education projects and Phase 3 of the Programme, the Global People project, was instigated with the aim of capturing this emergent knowledge for the benefit of others. This current report is a Landscaping Study that argues for the value of developing intercultural competence in order to better understand, create and manage productive and enjoyable partnerships with educational institutions outside the UK. Our arguments are supported by data from a wide range of research in disciplines as diverse as applied linguistics and international management. Key Findings a) The need for cultural awareness and sensitivity to diversity has been well established from studies in a range of disciplines. The high risks of mishandling intercultural interaction have prompted the development of a substantial literature both on perceived cultural differences and on the competencies that might be acquired to deal with this challenge. Although this concern has been driven by the financial requirements of international business, the internationalisation of Higher Education has imposed similar requirements on universities engaging in international collaboration. The challenge for academics and project managers is, within limited resources, to develop effective ways of identifying and acquiring the competencies needed to be interculturally effective. b) Interest in the cultural values of Chinese society has never been higher as global interaction with China, through business, government, education and science expands exponentially. There is a real danger in generalising about any nation’s cultural values and especially one where society and economy are changing so rapidly. However, the recent literature on China – from a number of disciplinary perspectives – argues that the influence of traditional Confucian values on Chinese behaviour is still strong. This means that values such as propriety, trustworthiness and the desire for harmony are still reflected in behaviour that is more relationship-based, restrained and consensual than may be normal in Western business relations. Working with Chinese partners will still be facilitated by an understanding of the centrality of social networks to Chinese private and public life and interaction in working teams will benefit from an appreciation of the Chinese respect for hierarchy and reluctance to pass judgement openly on colleagues. c) The majority of the work done on the impact of culture on e-learning has focused on issues of content and materials design. Too frequently this has been a concern for adaptation of existing materials for a local audience, rather than collaborative development of new materials by an intercultural team. As a consequence, there is limited insight into the complexities of designing and delivering learning programmes in different cultural contexts. What the research does show is that learning styles and preferences can vary between cultures and that this is related to the varying pedagogies dominant in particular national cultures. Understanding the implications of this diversity of pedagogies and reconciling cultural differences remain substantial challenges for those adapting or designing online learning programmes across a variety of cultures. d) Research into the performance of international teams offers many insights into good management practice. Principles of team selection, development, leadership and collaboration are well-established in the literature on global management and multinational partnerships. These principles recognise the importance of organisational culture, occupational culture and team roles as additional dimensions to that of national culture in influencing behaviour in project groups. International collaborations are viewed as complex dynamic systems which move through a life cycle, with valuable opportunities for reflection, learning and performance improvement. The implementation of transparent, and mutually agreed, norms, procedures and objectives is regarded as crucial to effective collaboration. e) At the level of the individual, an extensive literature exists on the competencies required to be effective in intercultural interaction. There is an apparently high degree of consensus on the core competencies that should be acquired by the culturally effective individual. Chief among these are self-awareness, cultural knowledge, language proficiency, openness, flexibility and communication skills. However, in many cases there is, at best, limited data to support the theories put forward. There is also a lack of clarity in the use of terminology, with no guarantee that researchers are using terms in the same way. The more detailed, applied research has succeeded in teasing out the knowledge and skills that may be critical in successful interaction by further breaking down broad competencies (e.g. ‘openness’) into more detailed behaviours (‘openness to new thinking; positive acceptance of different behaviour). A Way Forward A major obstacle to accessing and utilising the current knowledge and guidance on intercultural effectiveness is its dispersion across a large number of disciplines and the consequent disparity of the conceptual models and terminology employed. A framework for understanding intercultural effectiveness in international projects has a very high potential value to a wide range of professionals engaged in cross-cultural collaboration. There is substantial learning to be gained from the insights of different research disciplines but these insights need to be brought together in a way that practitioners from any field can access them without specialist knowledge. These ambitions have materialised in the form of the Toolbook, which is specifically designed to be used as a self-explanatory guide, complete with tools to stimulate awareness-raising and to encourage reflection on available resources and current practices

Semantic discovery and reuse of business process patterns

Patterns currently play an important role in modern information systems (IS) development and their use has mainly been restricted to the design and implementation phases of the development lifecycle. Given the increasing significance of business modelling in IS development, patterns have the potential of providing a viable solution for promoting reusability of recurrent generalized models in the very early stages of development. As a statement of research-in-progress this paper focuses on business process patterns and proposes an initial methodological framework for the discovery and reuse of business process patterns within the IS development lifecycle. The framework borrows ideas from the domain engineering literature and proposes the use of semantics to drive both the discovery of patterns as well as their reuse

Fast Conical Hull Algorithms for Near-separable Non-negative Matrix Factorization

The separability assumption (Donoho & Stodden, 2003; Arora et al., 2012) turns non-negative matrix factorization (NMF) into a tractable problem. Recently, a new class of provably-correct NMF algorithms have emerged under this assumption. In this paper, we reformulate the separable NMF problem as that of finding the extreme rays of the conical hull of a finite set of vectors. From this geometric perspective, we derive new separable NMF algorithms that are highly scalable and empirically noise robust, and have several other favorable properties in relation to existing methods. A parallel implementation of our algorithm demonstrates high scalability on shared- and distributed-memory machines.Comment: 15 pages, 6 figure