17,050 research outputs found
Remote Sensing for Agriculture, Ecosystems, and Hydrology XIV
No full textIntroduction -
This proceedings volume contains papers presented during the conference on Remote Sensing for Agriculture, Ecosystems, and Hydrology XIV. The conference was part of the 19th International Symposium on Remote Sensing sponsored by SPIE - The International Society for Optical Engineering. The symposium was held at the Edinburgh International Conference Centre, Edinburgh, United Kingdom, from 24th to 26th of September 2012.
The conference is dedicated to providing rapid dissemination of scientific and technical information, and attracted scientists and professionals from throughout Europe, Africa, Asia, and the Americas. More than 30 oral and 30 poster presentations were given, covering a broad range of topics in the field of remote sensing applications in environmental science.
The program was organized according to major themes, with 10 sessions on Agriculture: Leaf Area Index, Crop monitoring (2), Vegetation; Ecosystems: Water Bodies; Hydrology: Hydrology, Snow, Energy Balance, Thermal Remote Sensing, Water Content. The poster presentations also had good representation from the three major themes. The presentations described both fundamental and applications-based research activities from modelling, to laboratory and field experiments, to operational applications.
We extend our thanks to the Session chairs (Francesco Vuolo, Institute of Surveying, Remote Sensing and Land Information – University of Natural Resources and Life Sciences, and John H. Prueger, Agricultural Research Service – United States Department of Agriculture).
The oral program also included four invited presentations: John H. Prueger of United States Department of Agriculture (USA) gave a presentation on the subject “Sources of uncertainty for eddy covariance measurements over heterogeneous surfaces in a semi-arid region: impact to remote sensing”; Giuseppe Ciraolo of Università degli Studi di Palermo (Italy) gave a presentation on the subject “Mapping evapotranspiration on vineyards: a comparison between Penman-Monteith and Energy Balance approaches for operational purposes”; Massimo Menenti of Technische Univ. Delft (Netherlands) gave a presentation on the subject “Hyperspectral imaging: do information content, land cover classification, sensitivity analysis and inverse modeling of spectral reflectance lead to the same set of optimal spectral bands?”; Shahid Habib of NASA Goddard Space Flight Ctr. (USA) gave a presentation on the subject “Overview of USAID-World Bank-NASA collaboration to address water management issues in the MENA region”.
We also thank the presenters for their efforts and to the participants for their insightful questions and discussions. Special thanks are also due to the host city for the excellent venue, to Joel Shields the Proceedings Coordinator, to Alex Pulchart Rusova the Program Coordinator and to the SPIE organizational staff for their support prior to, during, and after the symposium. We look forward to an even more successful and exciting conference in 2013 in Dresden (Germany).
The Chairs and Editors
Christopher Neale
Antonino Maltes
Some account of the life and religious exercises of Mary Neale, formerly Mary Peisley. Principally compiled from her own writings.
No full textv, [2], 8-118, [2] p. ; 18 cm. (12mo)Signed by the compiler, Samuel Neale
The politics and economics of regulatory impact assessment
No full textThis is the author accepted manuscript. The final version is available from the publisher via the link in this record
Phase Distribution Efficiency of cm-Scale Ultrasonically Powered Receivers
No full textIn the domain of ultrasonically powered biomedical implants, there is an increasing interest in cm-scale ultrasonic receivers (RX). However, when a single-element transducer is used as the RX transducer, an uneven phase distribution across the RX area can significantly reduce the harvestable power. In this paper, we investigate the impact of lateral and angular misalignment on the acoustic field phase distribution across the RX surface. We show that, for a single-element RX transducer, lateral misalignment has minimal effect on the harvestable power, whereas even small angular misalignments can cause a considerable reduction, especially for larger RX sizes. We present a potential solution that consists of subdividing a large RX transducer (e.g. 20 × 20mm2) into smaller elements, which significantly improves power transfer efficiency by taking advantage of the smaller phase variation across the surface of each element. The trade-offs between achieving a minimum acceptable power transfer efficiency and managing the increased complexity in packaging and matching circuitry are also discussed.Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Electronic Components, Technology and MaterialsBio-Electronic
Highly efficient laser-driven Compton gamma-ray source
No full textThe recent advancement of high-intensity lasers has made all-optical Compton scattering become a promising way to produce ultrashort brilliant gamma-rays in an ultra-compact system. However, so far achieved Compton gamma-ray sources are limited by low conversion efficiency and spectral intensity. Here we present a highly efficient gamma photon emitter obtained by irradiating a high-intensity laser pulse on a miniature plasma device consisting of a plasma lens and a plasma mirror. This concept exploits strong spatiotemporal laser-shaping process and high-charge electron acceleration process in the plasma lens, as well as an efficient nonlinear Compton scattering process enabled by the plasma mirror. Our full three-dimensional particle-in-cell simulations demonstrate that in this novel scheme, brilliant gamma-rays with very high conversion efficiency (higher than 10(-2)) and spectral intensity (similar to 10(9) photons/0.1%BW) can be achieved by employing currently available petawatt-class lasers with intensity of 10(21) W cm(-2). Such efficient and intense gamma-ray sources would find applications in wide-ranging areas. ©2019 The Author(s)
Sedimentology, Petrography, and Depositional Environment of Dore Sediments Above the Helen-Eleanor Iron Range, Wawa, Ontario
No full textTitle: Sedimentology, Petrography, and Depositional Environment of Dore Sediments Above the Helen-Eleanor Iron Range, Wawa, Ontario, Author: Katheryn L. Neale, Location: ThodeArchean sediments of the Dore group, located in the Wawa greenstone belt, were studied. The sediments are stratigraphically above the carbonate facies Helen-Eleanor section of the Michipicoten Iron Formation. A mafic volcanic unit, 90 m thick, lies between the iron range and the sediments. Four main facies have been identified in the first cycle of clastic sedimentation above the mafic flow rocks, a 170 m break in stratigraphy separates the volcanics from the first facies. The basal sedimentary facies in an unstratified and poorly sorted granule-cobble conglomerate, 200 m thick, interpreted as an alluvial mass flow deposit. Above the conglomerate, there is a 20 m break in the statigraphic column. The second facies, 220 m to 415 m thick, consists of laminated (0.1-2 cm) argilites and siltstones, together with massive, thick-bedded (8-10 cm) greywackes. The argillites and siltstones are interpreted as interchannel deposits on an upper submarine fan, and the greywackes are explained as in-channel turbidity current deposition. The third facies, 750 m to 1300 m thick, consists of normally graded greywackes (15-20 cm thick beds) interbedded with sharp based siltstones; respective interpretations are overbanked and in-channel deposition on the middle fan. Above the siltstones, there is a 100 m break in the stratigraphic sequence. The fourth facies is a subarkosic sandstone, 1400 m to 1625 m thick, which is characterized by alternating cycles of ripples, megaripples and parallel lamination--suggesting deposition by an ephermal or braided river. The sedimentary cycle is terminated by the intervention of the thick gabbroic sill. The thick-bedded greywackes of the second facies contain significant amounts of authigenic talc, magnesite, ferroan dolimte and chlorite; they are not rich in detrital quartz (up to 33%) and feldspar (less than 1%). The scarcity of detrital minerals does not strictly comply with the definition of greywacke. However, based on the Mg-Fe character of the authigenic assemblage, the original or detrital minerals are thought to have been ferromegnesian.ThesisBachelor of Science (BSc
The development of an automated sentence generator for the assessment of reading speed
No full textReading speed is an important outcome measure for many studies in neuroscience and psychology. Conventional reading speed tests have a limited corpus of sentences and usually require observers to read sentences aloud. Here we describe an automated sentence generator which can create over 100,000 unique sentences, scored using a true/false response. We propose that an estimate of the minimum exposure time required for observers to categorise the truth of such sentences is a good alternative to reading speed measures that guarantees comprehension of the printed material. Removing one word from the sentence reduces performance to chance, indicating minimal redundancy. Reading speed assessed using rapid serial visual presentation ( RSVP) of these sentences is not statistically different from using MNREAD sentences. The automated sentence generator would be useful for measuring reading speed with button-press response ( such as within MRI scanners) and for studies requiring many repeated measures of reading speed
CM Periods, CM Regulators, and Hypergeometric Functions, I
No full textWe prove the Gross-Deligne conjecture on CM periods for motives associated with H-2 of certain surfaces fibered over the projective line. Then we prove for the same motives a formula which expresses the K-1-regulators in terms of hypergeometric functions F-3(2), and obtain a new example of non-trivial regulators
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