6,903 research outputs found

    A Novel Point-based Algorithm for Multi-agent Control Using the Common Information Approach

    Full text link
    The Common Information (CI) approach provides a systematic way to transform a multi-agent stochastic control problem to a single-agent partially observed Markov decision problem (POMDP) called the coordinator's POMDP. However, such a POMDP can be hard to solve due to its extraordinarily large action space. We propose a new algorithm for multi-agent stochastic control problems, called coordinator's heuristic search value iteration (CHSVI), that combines the CI approach and point-based POMDP algorithms for large action spaces. We demonstrate the algorithm through optimally solving several benchmark problems.Comment: 11 pages, 4 figure

    Central-provincial Politics and Industrial Policy-making in the Electric Power Sector in China

    Get PDF
    In addition to the studies that provide meaningful insights into the complexity of technical and economic issues, increasing studies have focused on the political process of market transition in network industries such as the electric power sector. This dissertation studies the central–provincial interactions in industrial policy-making and implementation, and attempts to evaluate the roles of Chinese provinces in the market reform process of the electric power sector. Market reforms of this sector are used as an illustrative case because the new round of market reforms had achieved some significant breakthroughs in areas such as pricing reform and wholesale market trading. Other policy measures, such as the liberalization of the distribution market and cross-regional market-building, are still at a nascent stage and have only scored moderate progress. It is important to investigate why some policy areas make greater progress in market reforms than others. It is also interesting to examine the impacts of Chinese central-provincial politics on producing the different market reform outcomes. Guangdong and Xinjiang are two provinces being analyzed in this dissertation. The progress of market reforms in these two provinces showed similarities although the provinces are very different in terms of local conditions such as the stages of their economic development and energy structures. The actual reform can be understood as the outcomes of certain modes of interactions between the central and provincial actors in the context of their particular capabilities and preferences in different policy areas. This dissertation argues that market reform is more successful in policy areas where the central and provincial authorities are able to engage mainly in integrative negotiations than in areas where they engage mainly in distributive negotiations

    Digital asset management via distributed ledgers

    Get PDF
    Distributed ledgers rose to prominence with the advent of Bitcoin, the first provably secure protocol to solve consensus in an open-participation setting. Following, active research and engineering efforts have proposed a multitude of applications and alternative designs, the most prominent being Proof-of-Stake (PoS). This thesis expands the scope of secure and efficient asset management over a distributed ledger around three axes: i) cryptography; ii) distributed systems; iii) game theory and economics. First, we analyze the security of various wallets. We start with a formal model of hardware wallets, followed by an analytical framework of PoS wallets, each outlining the unique properties of Proof-of-Work (PoW) and PoS respectively. The latter also provides a rigorous design to form collaborative participating entities, called stake pools. We then propose Conclave, a stake pool design which enables a group of parties to participate in a PoS system in a collaborative manner, without a central operator. Second, we focus on efficiency. Decentralized systems are aimed at thousands of users across the globe, so a rigorous design for minimizing memory and storage consumption is a prerequisite for scalability. To that end, we frame ledger maintenance as an optimization problem and design a multi-tier framework for designing wallets which ensure that updates increase the ledger’s global state only to a minimal extent, while preserving the security guarantees outlined in the security analysis. Third, we explore incentive-compatibility and analyze blockchain systems from a micro and a macroeconomic perspective. We enrich our cryptographic and systems' results by analyzing the incentives of collective pools and designing a state efficient Bitcoin fee function. We then analyze the Nash dynamics of distributed ledgers, introducing a formal model that evaluates whether rational, utility-maximizing participants are disincentivized from exhibiting undesirable infractions, and highlighting the differences between PoW and PoS-based ledgers, both in a standalone setting and under external parameters, like market price fluctuations. We conclude by introducing a macroeconomic principle, cryptocurrency egalitarianism, and then describing two mechanisms for enabling taxation in blockchain-based currency systems

    The International Political Economy of Land Reform and Conflict in Colombia 1936-2018

    Get PDF
    Why did land reforms attempted in 1936, 1961 and 1994 not lead to more equality, stability, and peace in Colombia? Using a theoretical framework informed by Gramscis theory of passive revolution, this study examines the origin of inequality and the propagation of conflict in Colombia by exploring the relationship between international political economy, production relations and class conflict surrounding three cases of land reform (1936, 1961 and 1994). I argue that land reforms have failed to address inequality and have exacerbated class conflicts for three interrelated reasons: 1) though campesinos demanded the redistribution of large estates, pro-capitalist land reforms left productive plantations intact and instead promoted access to lands in frontier areas where the state had little effective control over property rights; 2) demands for reforms emerged during 'commodity booms', when a bourgeois-peasant alliance in favour of capitalist expansion was possible, but during phases of subsequent crisis and price collapse, agrarian reforms were coopted by landlord-bourgeois alliances that pushed the consolidation of larger, more productive holdings; 3) the failure of reforms to address popular demands for land contributed to an atmosphere of instability in which reactionary elites used popular unrest as a pretext for repression against opponents of capitalism with the support of international financial and military power. The result has been the intensification of land conflicts and several waves of landlord-led dispossession, popular resistance, and counterinsurgency in the 1940s-50s, 1960s-1970s and 1980s-2000s. Political instability in Colombia is indicative of the dynamics of passive revolution as the case lends itself to a Gramscian analysis of uneven development in the 20th century Latin American context. Colombia's experience shows the limits of "passive revolutionary" land reforms which may unite diverse constituencies under certain conditions, but which leave the material and social foundations of conflict fundamentally unchanged, leaving campesinos vulnerable to shifts in global market conditions. This leads me to the conclusion that there will be no stable peace in Colombia without redistributive land reform. Redistribution has been the demand of the agrarian social movement since the 1930s but has been consistently denied in land reforms during broader processes of passive revolution that favour large-scale corporate farming, natural resource development and the debasement and exploitation of labour through dispossession in a context of unevenly expanding capitalism

    Towards thinking classrooms: foundation stage possibilities in Northern Ireland

    Get PDF
    The integration of thinking skills programmes into primary and secondary school curricula has gained increasing prominence in global educational policy over the past two decades. This research investigated the factors that influence how a particular approach to the development of thinking skills adopted in the Northern Ireland (NI) context is interpreted and implemented by teachers in early years classrooms. The Thinking Skills and Personal Capabilities Framework (TSPC) was introduced as a statutory component of the revised NI curriculum in 2007 and this study explores its enactment through the perceptions of key groups that interface with the policy from a range of different contexts: teachers and Head Teachers, Curriculum Advisory and Support staff, university academics and Initial Teacher Education staff. The study adopted an interpretive approach, utilising interviews with members of these key groups to explore their perceptions of the factors that influence the effective and consistent implementation of the TSPC and to explain possible reasons why it has embedded effectively in some NI primary schools and not in others. In addition to interviews, policy analysis of key texts that shape teachers’ approaches to the TSPC was undertaken using a framework based on Fairclough’s three-dimensional approach to critical discourse analysis. The purpose of this analysis was to explore the connection between the discourses used in these texts, and the extent to which the ideological cues that underpin them exert an influence on how teachers interpret and implement thinking skills in their practice. The study also explored how human capital theory, and an ecological approach to the enactment of the TSPC based on Bronfenbrenner’s Ecological Systems Model (1979), provide different frameworks for understanding how the TSPC is interpreted and implemented in practice, with particular reference to Northern Ireland. The findings suggest that there are a number of significant factors that both enable and constrain the effective implementation of the TSPC across schools. The region’s political, social and historical context was viewed by participants as playing a key role in how policy reforms are interpreted and implemented. School leaders can play a central role in mediating the impact of these reforms to ensure that they are implemented in ways that take account of diverse and specific school contexts. From the perspective of participants, Head Teachers and school leaders also play a pivotal role in nurturing teachers’ professional learning, skill, and motivation in the teaching of thinking skills. Consistent opportunities for professional development, including collaborative working, and sharing of practice, both in and beyond the school, was viewed as the primary means of ensuring the development of a shared vision and language about thinking skills, and participants agreed that this is central to its consistent implementation across all schools. Analysis of the participants’ understandings of the purpose of teaching thinking skills, and the aims of education more broadly, highlighted a tension between approaches to education that focus on children’s holistic development, and policy discourses, especially those related to Human Capital Theory that view education as a mechanism for achieving economic goals. The influence of these discourses across a range of public policy areas, as well as the disconnect between what participants and policy-makers viewed as the purpose of thinking, was highlighted in the analysis. For participants, the integration of thinking skills into the curriculum was about developing autonomy, criticality, and independence in children’s thinking, whereas policy-makers viewed it from a human capital perspective and strongly linked it to discourses of ‘lifelong learning’, ‘employability’ and ‘skill’. From the perspective of participants, the findings indicate that for policy makers in Northern Ireland to better understand how to embed the TSPC as a core component of the curriculum in all schools a number of cross-system actions need to be undertaken. These include a baseline review of the impact of the TSPC in the ten years since its inception as part of the comprehensive review of education announced by the Minister for Education in January 2021. The data suggests that this review should ensure that teachers and school leaders are central to its design and approach and that it is fully inclusive of all schools in Northern Ireland that sit within its scope. A return to more localised support and advice services with a coordinated approach to the development of the TSPC in all schools was also viewed by participants as essential to its development and embedding in all schools. A more coordinated, multi-disciplinary approach to implementation would, it was argued, ensure that ongoing professional learning in thinking skills was accessible, including the establishment of more strategic, collaborative partnerships with higher education, ITE and Inspection Services. This changed focus, I conclude, requires a move away from human capital and sector specific approaches to the consistent development of thinking skills programmes in all Northern Ireland schools. Recommendations also centre on future policy reforms that are inclusive and that give teachers their professional place as the primary implementers for the development of thinking skills programmes in schools

    THE DREAM OF A ZERO WASTE SOCIETY: EXPLORING THE PRACTICES AND BEHAVIOURS OF WASTE GENERATION IN GREATER MEXICO CITY

    Get PDF
    This research aims to re-conceptualise consumption and waste generation through a broader set of theoretical questions and analytical methodologies to establish a more holistic theoretical framework for comprehending the global South's "waste crisis." This thesis is primarily based on the following question: "why do we dispose of things?". By focusing on practices and behaviours of consumption and disposal by citizens of GMC, this thesis seeks to unpack the networks, symbols, skills, and meanings of these practices. This moves the conceptualisation of waste generation away from being conceived as an irremediable consequence of population growth or as primary responsibility on the consumers' shoulders. Therefore, this thesis proposes that consumers are embedded in a "throwaway environment" that pushes them toward unsustainable practices. However, this does not mean that the consumers have a "throwaway culture"; consumers might be "carriers" of practices, but they are still active participants. By unravelling the multiple layers of framing that aggregate into the consumption and disposal of citizens in GMC, we shall see how GMC society's historical, social, and political framework serves as dispositions that guide an individual to act. This study focuses on modifying the narrative of considering consumers as careless, lazy, or consumption-driven. It also sheds light on how ignoring these behaviours and practices will only bring temporary and reactionary solutions when dealing with waste. This dissertation also offers an analytical framework that explores how consumers' elements interrelate and are synergetic. By re-conceptualising consumption and waste generation, I propose not focusing on the insidious moral narrative of whether consumption and disposal are acceptable and to what degree. Instead, we should concentrate on a policy strategy that will help reduce the flow of materials. As a result, we might be able to curve a waste crisis by accepting shared responsibility (mostly borne by governments and businesses

    B/order work: recomposing relations in the seamful carescapes of health and social care integration in Scotland

    Get PDF
    As people, ageing and living with disabilities, struggle with how care is enacted through their lives, integrated care has gained policy purchase in many places, especially in the United Kingdom. Accordingly, there have been various (re)forms of care configurations instigated, in particular, promoting partnership and service redesign. Despite integrations apparent popularity, its contribution to improved service delivery and outcomes for people has been questioned, exposing ongoing uncertainties about what it entails and its associated benefits. Nonetheless, over decades, a remarkably consistent approach to integrated care has advanced collaboration as a solution. Equally, any (re)configurations emerge through wider infrastructures of care, in what might be regarded as dis-integrated care, as complex carescapes attempt to hold and aporias remain. In 2014, the Scottish Public Bodies (Joint Working) (Scotland) Act mandated Health and Social Care Integration (HSCI), as a means to mend fraying carescapes; a flagship policy epitomising public service reform in Scotland, in which normative aspirations of collaboration are central. What then are the accomplishments of this ambitious legislation? From the vantage point of 2021, HSCI has been assessed as slow and insubstantial, but this is not the complete picture. Narratives about failing to meet expectations obscure more complicated histories of cooperation and discord, successes and failures, and unintended consequences. Yet given collaborative ubiquity, if partnerships are contested how then are they practiced? To answer this question, I embarked on an interorganisational ethnography of the enactment of a Health and Social Care Partnership (HSCP), which went ‘live’ on April 1st, 2016; in a place I call ‘Kintra’. I interrogate what happened when several managers (from the NHS and Council) endeavoured to implement HSCI according to the precepts of the Act; working to both (re)configure and hold things together behind care frontiers; away from the bodywork of direct care, immersed in everyday arrangements in the spaces of governance and operations. I chart their efforts to comply with regulations, plan, and build governance apparatuses through documents. I explore through coalescent objects how distributed forms of governance, entwined in policy implementation, were subsequently both sustained, and challenged. I observed for seven months actors struggling to (re)configure care services embedded in a collaborative approach, as well as establish the legitimacy of the HSCP; exemplified through the fabrication of what was understood as a 'must-do' commissioning plan. In tracing documents, I show the ways in which HSCI was simultaneously materialised and constituted through documentation. I reveal how, in the mundane mattering of document manufacturing, possibilities for (re)forming the carescape emerged. By delving into inconspicuous, ‘seamful’ b/order work that both sustained distinctions between the NHS and Council and enabled b/order crossings, I expose how actors were knotted, and how this shaped efforts to recompose the contours of the carescape. While ‘Kintra’s story might be familiar, situated in concerns that may resonate across Scotland; I reveal how collaboration-as-practice is tangled in differing organisational practices, emerging from quotidian intra-actions in meeting rooms, offices, car parks and kitchenettes. I deploy a posthuman practice stance to show not only the way in which public administration ‘does’ care, but it’s world-making through a sociomaterial politics of anticipation. I was told legislation was the only way to make HSCI in ‘Kintra’ happen, nevertheless, there was resistance to limit the breadth and depth of integrating. Consequently, I show how the (re)organising of b/orders was an always-ongoing act of maintenance and repair of a (dis)integrating carescape; as I learnt at the end of my fieldwork, ‘it’s ‘Kintra, ‘it’s aye been!

    Concept development and transformative agency in the forging of a Campus Sustainability Statement:Insights from a Change Laboratory research-intervention.

    Get PDF
    With HEIs increasingly expected to provide leadership and guidance on the global challenges of climate change and sustainability, a body of literature has emerged concerned with embedding and implementing sustainability in HE. Prominent narratives in that literature discuss different approaches to implementing and embedding sustainability, identify the associated drivers and challenges, and debate the nature of the role that HE should play. However, relatively little attention has been focused on the processes by which stakeholders come together and develop their own concepts and frameworks, or how doing so develops the agency of those stakeholders to drive action in an institution. This thesis examines how stakeholders jointly developed a Campus Sustainability Statement (CSS) in their institution—subsequently launched in February 2017—and how doing so involved manifesting their transformative agency. It draws upon data from a Change Laboratory research-intervention project, in which participants came together in workshops to discuss and enact sustainability-related change in their institution over the course of five months, leading to several outcomes including proposals for academic programmes and a university research centre as well as the CSS. The analysis, which draws on workshop recordings and semi-structured interviews, uses a framework of concept development and transformative agency derived from the tradition of activity theory. The analysis first explores how the series of workshops unfolded; narrows the focus to consider the development of the CSS concept and associated manifestations of agency; and then highlights how the development of the CSS concept and participants’ agency were related. The thesis derives a range of themes relating to the relationship between the development of agency and the concept, highlighting how certain forms of agency can lead to major conceptual shifts while others typically lead to refinement. Manifestations of agency such as resisting and criticising in particular, played an important role in developing the CSS concept. The formulation of the CSS was heavily shaped by early criticism of the researcher’s initial ideas; principled resistance changed the direction of the research-intervention at key moments; and ongoing criticism served to encourage refinement of the concept throughout much of the research-intervention. Conversely, the CSS was specifically developed by participants in ways that were designed to embed agency into the concept. This work contributes to the literature on implementing SHE by emphasising the important role that collaborative concept development has to play in terms of addressing terminological barriers, engendering support from staff and developing the transformative agency of those involved in the process
    • …
    corecore