6,990 research outputs found
Impact of European Water Framework Directive Article 7 on Drinking Water Directive compliance for pesticides: challenges of a prevention-led approach
Article 7 of the European Water Framework Directive (WFD) promotes a prevention-led approach to European Drinking Water Directive (DWD) compliance for those parameters that derive from anthropogenic influences on raw water quality. However, the efficacy of pollution prevention interventions is currently uncertain and likely to be variable, which makes absolute compliance with the drinking water standard a significant challenge. Member State governments, the WFD competent authority, the DWD competent authority, water suppliers and agriculture are all affected by and have a different perspective on the nature of this challenge. This paper presents a discussion of these perspectives applicable to stakeholders in all European Member States; the analysis is supported with examples from England and Wales. Improved understanding of the challenges faced by each group is needed if these groups are to achieve the shared goals of WFD Article 7 compliance and DWD compliance without a disproportionately negative impact on agricultural productivity. In addition, the European Commission needs to be aware of and address a potential incompatibility between WFD Article 7 and the DWD. With this in mind, targeted recommendations for action are presented for each stakeholder group
Non-commutative Complex Projective Spaces and the Standard Model
The standard model fermion spectrum, including a right handed neutrino, can
be obtained as a zero-mode of the Dirac operator on a space which is the
product of complex projective spaces of complex dimension two and three. The
construction requires the introduction of topologically non-trivial background
gauge fields. By borrowing from ideas in Connes' non-commutative geometry and
making the complex spaces `fuzzy' a matrix approximation to the fuzzy space
allows for three generations to emerge. The generations are associated with
three copies of space-time. Higgs' fields and Yukawa couplings can be
accommodated in the usual way.Comment: Contribution to conference in honour of A.P. Balachandran's 65th
birthday: "Space-time and Fundamental Interactions: Quantum Aspects", Vietri
sul Mare, Italy, 25th-31st May, 2003, 10 pages, typset in LaTe
Modular symmetry and temperature flow of conductivities in quantum Hall systems with varying Zeeman energy
The behaviour of the critical point between quantum Hall plateaux, as the
Zeeman energy is varied, is analysed using modular symmetry of the Hall
conductivities following from the law of corresponding states. Flow diagrams
for the conductivities as a function of temperature, with the magnetic field
fixed, are constructed for different Zeeman energies, for samples with
particle-hole symmetry.Comment: 15 pages, 13 figure
National Infrastructure Commission Digitally Connected Infrastructure System Resilience: Literature Review (UCL)
This literature review was produced by Dr Tom Dolan, Senior Research Associate ICIF and UKCRIC, UCL on behalf of UCL and Arup for the National Infrastructure Commission. The literature review presents and critiques key areas of academic literature relevant to four research questions on digitally connected infrastructure systems (DCIS) posed by the National Infrastructure Commission (NIC). The review provides additional context to support analysis, findings and recommendations presented in the main project report, and can be read as in conjunction with the report or as a standalone documen
Systemically Resilient Prosperity: Adapting to and learning from COVID-19 (and other strategic challenges)
Briefing Note for UKCRIC Insights Series COVID-19 provides us with an opportunity to learn about resilience National Prosperity is enabled by a National System of Infrastructure Networks (National Infrastructure) and a suite of complementary prosperity enabling systems (such as social infrastructure facilities and services, households, communities and businesses.) Sustained long term National Prosperity requires National Infrastructure and all complementary prosperity-enabling systems to be intrinsically resilient to the disruptive impacts of current and future strategic challenges
Response to NIC Call for Ideas 2016. Outcome-Oriented Infrastructure Performance Indicators – Proof of Concept Study
Response to NIC Call for Ideas 2016. Infrastructure Systems UK Learning from International Best Practise Study
Systemic Perspectives on National Infrastructure for a Sustainable, Resilient Net Zero Future
All aspects of Modern life are infrastructure-enabled. National infrastructure (NI) simultaneously: supports the realisation of societally beneficial outcomes; and determines the level of GHG emissions; air, water, noise pollution; production of solid waste and sewage. Therefore, all sustainability and resilience challenges are interdependent emergent properties arising directly or indirectly from National Infrastructure. NI is a systemically, societally, economically, globally significant leverage point. The systemic transformation of NI into a net zero enabling, resilience enhancing, sustainability supporting system is urgently needed to catalyse the speed, scale and breadth of synergistic action needed to achieve Net zero and tackle other sustainability and resilience challenges. Systemic perspectives on, and systemic characterisations of, NI; its societal purpose; and the interdependent mechanisms that enable NI to fulfil its purpose are needed to support the required systemic transformation. This paper provides these
- …