45,384 research outputs found

    Linux XIA: an interoperable meta network architecture to crowdsource the future Internet

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    With the growing number of proposed clean-slate redesigns of the Internet, the need for a medium that enables all stakeholders to participate in the realization, evaluation, and selection of these designs is increasing. We believe that the missing catalyst is a meta network architecture that welcomes most, if not all, clean-state designs on a level playing field, lowers deployment barriers, and leaves the final evaluation to the broader community. This paper presents Linux XIA, a native implementation of XIA [12] in the Linux kernel, as a candidate. We first describe Linux XIA in terms of its architectural realizations and algorithmic contributions. We then demonstrate how to port several distinct and unrelated network architectures onto Linux XIA. Finally, we provide a hybrid evaluation of Linux XIA at three levels of abstraction in terms of its ability to: evolve and foster interoperation of new architectures, embed disparate architectures inside the implementation’s framework, and maintain a comparable forwarding performance to that of the legacy TCP/IP implementation. Given this evaluation, we substantiate a previously unsupported claim of XIA: that it readily supports and enables network evolution, collaboration, and interoperability—traits we view as central to the success of any future Internet architecture.This research was supported by the National Science Foundation under awards CNS-1040800, CNS-1345307 and CNS-1347525

    Aquaculture, fisheries, poverty and food security

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    Fisheries and aquaculture play important roles in providing food and income in many developing countries, either as a stand-alone activity or in association with crop agriculture and livestock rearing. The aim of this paper is to identify how these contributions of fisheries and aquaculture to poverty reduction and food security can be enhanced while also addressing the need for a sustainability transition in over-exploited and over-capitalized capture fisheries, and for improved environmental performance and distributive justice in a rapidly growing aquaculture sector. The focus of the paper is on the poverty and food security concerns of developing countries, with an emphasis on the least developed. The emphasis is on food security rather than poverty reduction policies and strategies, although the two are of course related. The food security agenda is very much to the fore at present; fish prices rose along with other food prices in 2007-8 and as fish provide important nutritional benefits to the poor, food security has become a primary concern for sector policy

    Sharpening the Cutting Edge: Corporate Action for a Strong, Low-Carbon Economy

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    Outlines lessons learned from early efforts to create a low-carbon economy, current and emerging best practices, and next steps, including climate change metrics, greenhouse gas reporting, effective climate policy, and long-term investment choices

    A Strategy for the Commons: Business-driven Networks for Collective Action and Policy Dialogue. The Example of Global Compact Local Networks

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    The current challenges involved with ensuring global sustainability are daunting. Climate change is increasing the incidence of severe weather events, natural resources are undergoing rapid depletion, labor conditions in global supply chains are often inhumane and degrading, and corruption around the globe is undermining competition and destroying wealth. These and other global challenges pose serious problems not only to mankind in general, but also to the sustainability of companies. Indeed, companies rely on enabling environments, local and global alike, for long-term success. Companies depend on a reliable legal framework conducive to investment and competition, a healthy and viable natural environment, and a secure social environment that facilitates the wellbeing of its inhabitants. However, given the overexploitation of shared resources, also known as the “tragedy of the commons,” companies often find it difficult to address global sustainability challenges and invest in enabling environments. All sustainability challenges face this tragedy: Although each societal actor ought to have an interest in creating or ensuring the viability of these common goods, the incentive to “free ride” on the efforts of others and let them bear the costs is exceedingly high. As a result, short-term profit maximization often damages the longterm growth prospects of companies. Since governments lack the capacity to address the complexity and global scope of sustainability challenges alone, a “strategy for the commons” is needed that allows companies, governments and other actors to overcome the free rider dilemma and invest in sustainable development

    Aquaculture, fisheries, poverty and food security

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    Fisheries and aquaculture play important roles in providing food and income in many developing countries, either as a stand-alone activity or in association with crop agriculture and livestock rearing. The aim of this paper is to identify how these contributions of fisheries and aquaculture to poverty reduction and food security can be enhanced while also addressing the need for a sustainability transition in over-exploited and over-capitalized capture fisheries, and for improved environmental performance and distributive justice in a rapidly growing aquaculture sector. The focus of the paper is on the poverty and food security concerns of developing countries, with an emphasis on the least developed. The emphasis is on food security rather than poverty reduction policies and strategies, although the two are of course related. The food security agenda is very much to the fore at present; fish prices rose along with other food prices in 2007-8 and as fish provide important nutritional benefits to the poor, food security has become a primary concern for sector policy.Aquaculture, Food security, Fisheries, Nutrition

    Revitalising African agriculture through innovative business models and organisational arrangements : promising developments in the traditional crops sector.

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    Within the last four years, a number of high profile reports outlining new strategies for pulling African agriculture out of its current impasse have emerged. These include the Comprehensive African Agriculture Development Programme of NEPAD, and the InterAcademy Council Report commissioned by UN Secretary General Koffi Annan. Whilst these strategies are a welcome improvement on those that have characterised African agriculture in the past, it is argued here that like their predecessors, they fail to focus on business-competitive approaches as an integral part of the reform package needed to stimulate African agricultural productivity and development. This paper draws on innovation, business and organisation literature to highlight some of these approaches. It focuses on three concepts : value innovation, lead user focus and organisational value logic
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