147 research outputs found
Generalised Compositional Theories and Diagrammatic Reasoning
Get PDFThis chapter provides an introduction to the use of diagrammatic language, or
perhaps more accurately, diagrammatic calculus, in quantum information and
quantum foundations. We illustrate the use of diagrammatic calculus in one
particular case, namely the study of complementarity and non-locality, two
fundamental concepts of quantum theory whose relationship we explore in later
part of this chapter.
The diagrammatic calculus that we are concerned with here is not merely an
illustrative tool, but it has both (i) a conceptual physical backbone, which
allows it to act as a foundation for diverse physical theories, and (ii) a
genuine mathematical underpinning, permitting one to relate it to standard
mathematical structures.Comment: To appear as a Springer book chapter chapter, edited by G.
Chirabella, R. Spekken
Development of an operational, risk-based approach to surface water flood forecasting
Get PDFSurface water flooding occurs regularly across England and Wales, especially during the summer months. It is widely acknowledged that surface water flooding presents a particular challenge to forecasters because of the difficulties inherent in forecasting intense localised rainfall and the highly complex runoff and drainage processes which operate at the surface, particularly in urban areas.
The Flood Forecasting Centre (FFC) has a responsibility to provide guidance on the risk of surface water flooding to Category 1 and 2 responders across England and Wales. Consequently, there is the requirement for improved methods for forecasting surface water flood risk and the FFC is currently involved in developing and trialling a novel surface water flood forecasting system, the Surface Water Flooding Hazard Impact Model (SWF HIM).
The SWF HIM offers significant advances over existing surface water flood forecasting methods used by the FFC, including provision of a risk-based approach. The SWF HIM links probabilistic runoff forecasts from the Centre for Ecology & Hydrology’s Grid-to-Grid model with a library of pre-calculated surface water impact information compiled by the Health and Safety Laboratory. These probabilistic runoff forecasts are combined with impact information to provide a forecast of surface water flood risk at a 1km2 resolution across England and Wales.
This presentation outlines the methodology together with some initial results from the trial. The work has been undertaken as part of the UK’s Natural Hazards Partnership (NHP) and also benefits from the close working relationship between the Environment Agency and the Met Office through the FFC
Airborne Forward-Looking Interferometer for the Detection of Terminal-Area Hazards
Get PDFThe Forward Looking Interferometer (FLI) program was a multi-year cooperative research effort to investigate the use of imaging radiometers with high spectral resolution, using both modeling/simulation and field experiments, along with sophisticated data analysis techniques that were originally developed for analysis of data from space-based radiometers and hyperspectral imagers. This investigation has advanced the state of knowledge in this technical area, and the FLI program developed a greatly improved understanding of the radiometric signal strength of aviation hazards in a wide range of scenarios, in addition to a much better understanding of the real-world functionality requirements for hazard detection instruments. The project conducted field experiments on three hazards (turbulence, runway conditions, and wake vortices) and analytical studies on several others including volcanic ash, reduced visibility conditions, in flight icing conditions, and volcanic ash
Development and Preliminary Technical Adequacy of Schoolwide Integrated Framework for Transformation Fidelity of Implementation Tool
Get PDFU.S. public education systems are required to provide free appropriate public education to students with disabilities in least restrictive environments that are appropriate to meet their individual needs. The practice of educating students with disabilities in neighborhood schools in age-appropriate general education classrooms and other school settings to meet this requirement has come to be known as “inclusive education.” The longstanding interest in keeping students with disabilities in the same classrooms with their neighbors and peers has created a need for reform to establish equity in America’s schools. Schoolwide Integrated Framework for Transformation (SWIFT) is a whole-system school reform model provided through a national technical assistance center that addresses core features of inclusive education support for elementary and middle schools, particularly those that are chronically low performing and those serving students with the most extensive needs. We describe the development and preliminary technical adequacy of Schoolwide Integrated Framework for Transformation Fidelity of Implementation Tool (SWIFT-FIT) as a means to document the extent to which schools are implementing inclusive education. Findings provide preliminary support for trained assessors using SWIFT-FIT as a valid and reliable instrument to produce evidence that describes the extent to which schools install, implement, and sustain these evidence-based practices. Researchers and other school personnel can use these data to evaluate the impact of implementation on progress as well as important student and other outcomes
Introduction to special section: Mining and minerals exploration interpretation
Get PDFMineral deposits are found in a variety of geologic settings and ore-forming minerals can have a vast range of physical properties. The search for these deposits is also relatively near-surface thus far. These factors allow for a large number of possible airborne and ground-based techniques to be used in geophysical exploration. Deciding on the proper geophysical technique and survey layout requires an understanding of the target, its associated alteration, the variations in physical properties and the geologic and structural setting. Knowing the exploration history is important, particularly in exploration programs that are more mature. Interpretation of the data requires the integration of the myriad of information ranging from physical property models constructed from inversions or forward modeling, physical property data, geochemical data, mineral deposit model, and host geology.
We envisioned a special section on mining geophysics to highlight the integrative nature of mining geophysics through a collection of papers using multiple geophysical data to provide geology and exploration rationale along with the interpretations. So in collaboration with the editor of Interpretation, we issued a call for papers that discussed geophysics as applied to mining, discussed all relevant geophysical data and provided geologic information and the exploration rationale along with the interpretations. The following papers provide insight into the importance of geophysics in mineral exploration from the belt or camp scale to exploration focused on a specific orebody.
Wright and Koehler combine controlled-source audio magnetotelluric and gravity data in a previously explored terrain of the Carlin trend. The authors demonstrate that successive geophysical surveys, combined with geologic understanding and target model development were key to a significant gold discovery.
Martinez and Li demonstrate that lithological interpretation techniques based on inversion of airborne gravity gradiometry and aeromagnetic data can be used to characterize an iron-ore formation in Minas Gerais. The authors show that lithology differentiation using either generic physical property constraints or geologic constraints can contribute to a geologic understanding at the deposit scale.
Olaniyan et al. study the 3D geologic and structural setting of the Sudbury structure using an integration of geologic data with airborne gravity and magnetic data. Using standard 2.5D modeling and 3D Geomodeller software, they generate continuous surfaces in three dimensions for each geologic interface, which leads them to suggest a possible deformation history of the Sudbury structure.
Woolrych et al. present data from a range of airborne and ground-based geophysical techniques that have contributed to the discovery of the Kitumba iron oxide copper gold (IOCG) deposit in central Zambia. The interpretation of geophysical data following an exploration criteria of an IOCG-type deposit model has opened up exploration for this style of deposit in Central Zambia.
LĂĽ et al. present a case study that demonstrates the use of integrating seismic, magnetotelluric, gravity, and magnetic data to interpret the 3D structure and deformation at depth in the Lu-Zong ore district of Eastern China. Insights were obtained into the fault systems and crustal architecture that are essential for understanding the Lu-Zong ore district mineral system and for mineral exploration at depth.
Legault et al. present the results of three different airborne electromagnetic (EM) surveys over the Lalor copper-zinc-gold volcanogenic massive sulfide deposit, which is more than 500 m deep and is in the Flin Flon Greenstone Belt of north-central Manitoba. The active and passive source EM surveys span a five year period, which means that the development of EM systems over this period can be assessed
Phenomenology of the Little Higgs Model
Full text linkWe study the low energy phenomenology of the little Higgs model. We first
discuss the linearized effective theory of the "littlest Higgs model" and study
the low energy constraints on the model parameters. We identify sources of the
corrections to low energy observables, discuss model-dependent arbitrariness,
and outline some possible directions of extensions of the model in order to
evade the precision electroweak constraints. We then explore the characteristic
signatures to test the model in the current and future collider experiments. We
find that the LHC has great potential to discover the new SU(2) gauge bosons
and the possible new U(1) gauge boson to the multi-TeV mass scale. Other states
such as the colored vector-like quark T and doubly-charged Higgs boson Phi^{++}
may also provide interesting signals. At a linear collider, precision
measurements on the triple gauge boson couplings could be sensitive to the new
physics scale of a few TeV. We provide a comprehensive list of the linearized
interactions and vertices for the littlest Higgs model in the appendices.Comment: 43 pages, 6 figures; v2: discussion clarified, typos corrected; v3:
version to appear in PRD; v4: typos fixed in Feynman rule
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