Warped cones and property A

We describe a construction (the `warped cone construction') which produces examples of coarse spaces with large groups of translations. We show that by this construction we can obtain many examples of coarse spaces which do not have property A or which are not uniformly embeddable into Hilbert space.Comment: Published by Geometry and Topology at http://www.maths.warwick.ac.uk/gt/GTVol9/paper4.abs.html Version 2: proof of theorem 1.10 correcte

Carbon isotopic characterisation of dissolved organic mater during water treatment

Water treatment is a series of physio-chemical processes to aid organic matter (OM) removal, which helps to minimise the formation of potentially carcinogenic disinfection by-products and microbial regrowth. Changes in OM character through the treatment processes can provide insight into the treatment efficiency, but radiogenic isotopic characterisation techniques have yet to be applied. Here, we show for the first time that analysis of 13C and 14C of dissolved organic carbon (DOC) effectively characterises dissolved OM through a water treatment works. At the sites investigated: post-clarification, DOC becomes isotopically lighter, due to an increased proportion of relatively hydrophilic DOC. Filtration adds ‘old’ 14C-DOC from abrasion of the filter media, whilst the use of activated carbon adds ‘young’ 14C-DOC, most likely from the presence of biofilms. Overall, carbon isotopes provide clear evidence for the first time that new sources of organic carbon are added within the treatment processes, and that treated water is isotopically lighter and typically younger in 14C-DOC age than untreated water. We anticipate our findings will precipitate real-time monitoring of treatment performance using stable carbon isotopes, with associated improvements in energy and carbon footprint (e.g. isotopic analysis used as triggers for filter washing and activated carbon regeneration) and public health benefits resulting from improved carbon removal

Kasparov Products and Dual Algebras

AbstractFundamental to the analyticK-homology theory of G. Kasparov [7, 8] is the construction of the external product inK-homologyKi(A)⊗Kj(B)→Ki+j(A⊗B).This construction is modeled on the “sharp product” of elliptic operators over compact manifolds [2], and involves some deep functional-analytic considerations which at first sight may appear somewhatad hoc. A different approach to Kasparov's theory has recently been expounded by N. Higson [5], following the lead of W. Paschke [9]. He constructs a “dual algebra” D(A) for any separableC*-algebraA, in such a way thatKi(A) is canonically identified with the ordinaryK-theory of the dual algebra,K1−i(D(A)). Higson's treatment covers the exactness and excision properties ofK-homology, but stops short of the Kasparov product; it is natural to ask whether the product itself can be given a “dual” interpretation, in terms of the external product in ordinaryK-theory. It is the purpose of this article to show that this can indeed be done. A more leisurely exposition ofK-theory andK-homology from this perspective will appear in [6]

EVERYTHING IN THE GARDEN: A LIGHTING DESIGN THE INA AND JACK KAY THEATRE CLARICE SMITH PERFORMING ARTS CENTER UNIVERSITY OF MARYLAND- COLLEGE PARK

The purpose of this thesis is to provide research, supporting paperwork and production photographs that document the lighting design for the University of Maryland- College Park, School of Theatre, Dance, and Performance Studies production of Everything in the Garden. This thesis contains the following: research images collected to develop and visually communicate ideas about color, texture, intensity, form, composition, and mood to the production team; preliminary and final organization of desired equipment to execute the lighting design; a full set of drafting plates and supplementary paperwork used to communicate the organization and placement of lighting equipment to the master electrician; magic sheets and cue list used as organizational tools for the lighting designer during the tech process. Archival production photographs are included as documentation of the completed design

Wheatbelt waterwise = saltwise : gardening guide

As a result of agricultural clearing, many country towns are now feeling the effects of rising groundwater and the salt that it carries. Salinity has been identified as Australia’s number one environmental problem. While most people think that salinity means land lost to agriculture, it also poses a serious threat to many country towns. A report for the Department of Agriculture in 2001 highlighted the need for simple and cost-effective salinity management strategies to be adopted in wheatbelt towns. These included water recycling, revegetation and more efficient water use.https://researchlibrary.agric.wa.gov.au/bulletins/1038/thumbnail.jp

Research Progress and Accomplishments on ISS

The first research payloads reached the International Space Station (ISS) more than two years ago, with research operating continuously since March 2001. Seven research racks are currently on-orbit, with three more arriving soon to expand science capabilities. Through the first five expeditions, 60 unique NASA-managed investigations from 11 nations have been supported, many continuing into later missions. More than 90,000 experiment hours have been completed, and more than 1,000 hours of crew time have been dedicated to research, numbers that grow daily. The multidisciplinary program includes research in life sciences, physical sciences, biotechnology, Earth sciences, technology demonstrations as well as commercial endeavors and educational activities. The Payload Operations and Integration Center monitors the onboard activities around the clock, working with numerous Principal Investigators and Payload Developers at their remote sites. Future years will see expansion of the station with research modules provided by the European Space Agency and Japan, which will be outfitted with additional research racks. The first research payloads arrived at ISS more than two years ago, and continuous science has been ongoing for more than one and a half years. During this time, the research capabilities have been tremendously increased, even as assembly of the overall platform continues. Despite significant challenges along the way, ISS continues to successfully support a large number of investigations in a variety of research disciplines. The results of some of the early investigations are reaching the publication stage. The near future looms with new challenges, but experience to date and dedicated efforts give reason to be optimistic that the challenges will be overcome and that new and greater successes will be added to past ones