64 research outputs found

    LIPIcs, Volume 244, ESA 2022, Complete Volume

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    LIPIcs, Volume 244, ESA 2022, Complete Volum

    Non-acyclicity of coset lattices and generation of finite groups

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    Risk-based modelling of faecal indicator organism export from agricultural landscapes

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    Microbial contamination of watercourses can threaten ecosystem services related to clean water; for example, recreational bathing, shellfish harvesting and potable water supplies. This is because pathogens associated with faeces from warm blooded animals can cause gastrointestinal illness in exposed human beings. Microbial water quality impacts from point sources associated with wastewater transfer and treatment have been reduced through engineering solutions. However, as these sources of contamination have been reduced diffuse sources have become more important. Diffuse pollution describes water quality impacts originating from accumulations of many small, spatially distributed, inputs. These sources of pollution are difficult to manage because their loading and connectivity to sensitive receptors varies spatially and temporally. The Sensitive Catchment Integrated Mapping Analysis Platform (SCIMAP) is a risk-based approach that has been developed to map sources of diffuse sediment and conservative nutrient pollution allowing for efficient targeting of mitigation efforts which are often expensive and occupy valuable productive land. SCIMAP has been well received within the regulatory community in the United Kingdom and its development to account for diffuse microbial pollution is therefore timely. The primary goal for this thesis was to explore SCIMAP’s application to microbial pollution, highlight areas for improvement and work towards a new SCIMAP framework that accounts for microbial diffuse pollution. An initial application of SCIMAP, as it exists, revealed that the time-integrated approach currently employed may be inappropriate for sources of microbial pollution that are likely to vary temporally due to microbial die off. Furthermore, an enhanced description of land use incorporating spatial distributions of the numbers and types of livestock may improve SCIMAP’s 4 performance. Spatial variations in microbial source loading arising from differences in the persistence of E. coli (an indicator of faecal pollution) in the faeces of different livestock was investigated within a controlled environment facility. This controlled experiment provided a novel non-linear description of E. coli growth in ovine and 2 types of bovine faeces for a period of 30 days post defecation. Potential variation in rainfall induced E. coli release from faecal matrices associated, with beef cattle, dairy cattle and sheep were explored using rainfall simulation. An asymptotic model of E. coli release with increasing rainfall depth was developed and no difference was discovered in the profile of release from sheep, beef cattle and dairy cattle. Finally lessons from these investigations were combined to propose a framework for an evolution of SCIMAP allowing for a better description of microbial source and transfer risk. This new version of SCIMAP will provide a decision support tool allowing for more efficient targeting of mitigation efforts reducing microbial impacts to important ecosystem services relying on clean water

    Proceedings of the 94th Annual Virginia Academy of Science Meeting, 2016

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    Full proceedings of the 94th Annual Virginia Academy of Science Meeting, May 18-20, 2016, at University of Mary Washington, Fredericksburg, VA

    Battery Systems and Energy Storage beyond 2020

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    Currently, the transition from using the combustion engine to electrified vehicles is a matter of time and drives the demand for compact, high-energy-density rechargeable lithium ion batteries as well as for large stationary batteries to buffer solar and wind energy. The future challenges, e.g., the decarbonization of the CO2-intensive transportation sector, will push the need for such batteries even more. The cost of lithium ion batteries has become competitive in the last few years, and lithium ion batteries are expected to dominate the battery market in the next decade. However, despite remarkable progress, there is still a strong need for improvements in the performance of lithium ion batteries. Further improvements are not only expected in the field of electrochemistry but can also be readily achieved by improved manufacturing methods, diagnostic algorithms, lifetime prediction methods, the implementation of artificial intelligence, and digital twins. Therefore, this Special Issue addresses the progress in battery and energy storage development by covering areas that have been less focused on, such as digitalization, advanced cell production, modeling, and prediction aspects in concordance with progress in new materials and pack design solutions

    16th Scandinavian Symposium and Workshops on Algorithm Theory: SWAT 2018, June 18-20, 2018, Malmö University, Malmö, Sweden

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    The Second International Symposium on Tilapia in Aquaculture

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    Proceedings of the symposium held in 1987 in Bangkok, Thailand, by tilapia scientists to discuss strategies for future research and development in the tilapia industry worldwide. Contains 82 full papers, 17 poster abstracts and author and species indexes. The full papers were presented under 7 sessions: culture systems, management and production; pathology; genetics and reproduction; nutrition, physiology; biology and ecology; and economics and socioeconomics.Tilapia culture, Conferences

    Mobile Ad Hoc Networks

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    Guiding readers through the basics of these rapidly emerging networks to more advanced concepts and future expectations, Mobile Ad hoc Networks: Current Status and Future Trends identifies and examines the most pressing research issues in Mobile Ad hoc Networks (MANETs). Containing the contributions of leading researchers, industry professionals, and academics, this forward-looking reference provides an authoritative perspective of the state of the art in MANETs. The book includes surveys of recent publications that investigate key areas of interest such as limited resources and the mobility of mobile nodes. It considers routing, multicast, energy, security, channel assignment, and ensuring quality of service. Also suitable as a text for graduate students, the book is organized into three sections: Fundamentals of MANET Modeling and Simulation—Describes how MANETs operate and perform through simulations and models Communication Protocols of MANETs—Presents cutting-edge research on key issues, including MAC layer issues and routing in high mobility Future Networks Inspired By MANETs—Tackles open research issues and emerging trends Illustrating the role MANETs are likely to play in future networks, this book supplies the foundation and insight you will need to make your own contributions to the field. It includes coverage of routing protocols, modeling and simulations tools, intelligent optimization techniques to multicriteria routing, security issues in FHAMIPv6, connecting moving smart objects to the Internet, underwater sensor networks, wireless mesh network architecture and protocols, adaptive routing provision using Bayesian inference, and adaptive flow control in transport layer using genetic algorithms
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