27,563 research outputs found
Harrison, J. F., Woods, H. A. & Roberts, S. P.— Ecological and environmental physiology of insects. Oxford University Press, Oxford & New York. 2012
No full textHarrison, J. F., Woods, H. A. & Roberts, S. P.— Ecological and environmental physiology of insects. Oxford University Press, Oxford & New York. 2012. In: Revue d'Écologie (La Terre et La Vie), tome 67, n°4, 2012. pp. 461-462
Real-space imaging of confined magnetic skyrmion tubes
No full textThis repository contains the scripts and notebooks to reproduce the figures, simulations and numerical data shown in Real-space Imaging of Confined Magnetic Skyrmion Tubes by M. T. Birch, D. Cortés-Ortuño, L. A. Turnbull, M. N. Wilson, F. Groß, N. Träger, A. Laurenson, N. Bukin, S. H. Moody, M. Weigand, G. Schütz, H. Popescu, R. Fan, P. Steadman, J. A. T. Verezhak, G. Balakrishnan, J. C. Loudon, A. C. Twitchett-Harrison, O. Hovorka, H. Fangohr, F. Ogrin, J. Gräfe and P. D. Hatton.
Both simulation and experimental data analysis are performed using Python with the Matplotlib, Jupyter, Scipy, Numpy and h5py libraries.
Jupyter notebooks are provided to process the experimental data and reproduce the STXM, X-Ray Holography and LTEM images, which are shown as Figures 3, 4 and 5 in the paper.
Simulation scripts are based on the finite difference micromagnetic code OOMMF with the extension to simulate DMI for materials with symmetry class T: [oommf-extension-dmi-t](https://github.com/joommf/oommf-extension-dmi-t)
The analysis of OOMMF's output files, which are in the `OMF` format, are processed using the [OOMMFPy](https://github.com/davidcortesortuno/oommfpy) library, which can calculate the topological charge in a 2D slice.
Three-dimensional visualisations of the magnetic states are performed using Paraview. In order to get VTK files for visualisation, convert the `OMF` files into `.vtk` using the `OOMMFPy` library.
Latest version of this Data Set can be found at the Github repository:
https://github.com/davidcortesortuno/paper-2020_real-space_imaging_of_confined_magnetic_skyrmion_tubes</p
Parsimonious Kernel Fisher Discrimination
No full textBy applying recent results in optimization transfer, a new algorithm for kernel Fisher Discriminant Analysis is provided that makes use of a non-smooth penalty on the coefficients to provide a parsimonious solution. The algorithm is simple, easily programmed and is shown to perform as well as or better than a number of leading machine learning algorithms on a substantial benchmark. It is then applied to a set of extreme small-sample-size problems in virtual screening where it is found to be less accurate than a currently leading approach but is still comparable in a number of cases
'Black Hat Dance', a Tibetan dance drama at Labrang Monastery
No full textTibet"The dance-dramas are simple in theme yet impressive, and carry conviction. They are given as a form of religious instruction. Frightfully masked demons and devils triumphed over by gorgeously gowned saints are designed to dogmatize forcefully the almightiness of the [Buddhist] Church over man, beast, and spirit alike ."Harrison, F. (1936). Through forbidden Tibet: an adventure into the unknown. London: Jarrolds. (p.210-211).GrayscaleForman Nitrate Negatives, Box 1
Assessing the Strategic Benefits of Distributed Generation Ownership for DNOs
No full textThe potential for distributed generation (DG) to act as an alternative distribution planning option is now
well-recognised by academia and industry, and could play a significant role in electricity distribution utility
operation and design. However, the unbundling requirements of European Directive 2003/54/EC, coupled
with traditional network planning approaches adopted by European Distribution Network Operators (DNOs),
appear to be hindering development of DG and its deployment for distribution network ancillary services. The
incentives – or otherwise – that arise from alternative models of DG ownership by bundled and unbundled
distribution utilities are examined here. The preference for the siting and sizing of DG installations by DNOs is
simulated using a multi-year multi-period optimal power flow. Broadly based on the recent UK regulatory
framework, the DG ownership issue and its potential to influence DG penetration are explored
Recommended from our members
Arizona State Museum Archaeological Series No. 203
No full textWhiptail Ruin (AZ BB:10:3 [ASM]): A Classic Period Community in the Northeastern Tucson Basin edited by Linda M. Gregonis, Gayle Harrison Hartmann with contributions by Jenny L. Adams, Carl F. Aten, Lane Anderson Beck, Lisa W. Huckell, James P. Lombard, Laural Myers, Sharon F. Urban. Arizona State Museum, The University of Arizona, In Collaboration with the Arizona Archaeological and Historical Society, Tucson. Arizona State Museum Archaeological Series 203.In the 1960s and 1970s, Arizona Archaeological and Historical Society volunteers, University of Arizona students, and Pima Community College students excavated Whiptail Ruin, a mid- to late A.D. 1200s village in the northeastern Tucson Basin. This volume presents the results of analyses of the notes and artifacts from work at that site. The village may have been home to hunting specialists. Artiodactyl remains were “stored” in structures in a manner similar to that described for historic O’odham hunting practices. Pottery and lithics from the site show that its residents had strong ties to the Tucson area, as well as to migrants from the Mogollon highlands
who moved into the San Pedro Valley in the thirteenth century. And, of interest to chronologists of the region, Whiptail Ruin is one of the first sites in the Tucson Basin to be tree-ring dated. In addition to providing scholars with usable data, the research detailed in this volume shows that information mined from old, archived projects can be relevant and important to today’s archaeological questions.En las décadas de 1960 y 1970 los voluntarios de la Sociedad Arqueológica e Histórica de Arizona, los estudiantes de la Universidad de Arizona y también los de Pima Community College excavaron las ruinas de Whiptail, un pueblo ubicado en el noreste de la Cuenca de Tucson a mediados y finales del siglo XIII. Este tomo contiene los resultados del análsis de los apuntes y artefactos del trabajo que hicieron al sitio. El pueblo podría haber sido el lugar donde habitaban cazadores. Los restos del artiodactyl fueron almacenados en una manera semejante a los que venían por medio del estilo de cazar de los O’odham en la época histórica. Céramica y líticos del sitio muestran que sus habitantes tenían lazos fuertes a Tucson, así como también a los migrantes de las tierras altas de Mogollón quienes se radicaron al Valle de San Pedro durante el siglo XIII. De interés a las cronistas de la región, las ruinas de Whiptail son uno de los sitios de la Cuenca de Tucson que han sido datados por medio de los anillos de árboles. Además de proporcionar información útil a los investigadores, las investigaciones divulgadas en este tomo demuestran que los datos que vienen de proyectos antiguos todavía son relevantes e importantes a las cuestiones arqueológicas en la actualidad.Introduction / by Linda M. Gregonis, Sharon F. Urban, and Gayle Harrison Hartmann -- Architectural structures / by Gayle Harrison Hartmann and Linda M. Gregonis -- Ceramics / by Linda M. Gregonis -- Flaked stone artifacts / by Laurel Myers and Linda M. Gregonis -- Ground stone artifacts / by Jenny L. Adams -- Shell / by Linda M. Gregonis, with contributions by Sharon F. Urban -- Miscellaneous artifacts / by Gayle Harrison Hartmann and Linda M. Gregonis -- Animal remains / by Linda M. Gregonis -- Plant remains / by Linda M. Gregonis, with contributions by Lisa W. Huckell -- Human remains / by Lane Anderson Beck -- Chronology, ritual, and migration : the clues from Whiptail / by Linda M. Gregonis -- Appendix A : Chemical analysis of pottery and clay from Whiptail Ruin / by Carl F. Aten -- Appendix B : A petrographic analysis of Whiptail Site ceramics / by James P. Lombard.This title from the ASM Archaeological Series is made available by the Arizona State Museum and University of Arizona Libraries. If you have questions about this title, please contact Jannelle Weakly at the Arizona State Museum, (520) 621-6311, [email protected]
The equine F.F.Vs., a study of the evidence for the English horses imported into Virginia before the revolution.
No full textPreface signed: F. H. [i. e. Fairfax Harrison]Bibliography: p. [11]-24.Mode of access: Internet
Evidence for oxygen and carbon dioxide receptors in insect CNS influencing ventilation
No full textVentilatory efferent discharges in the isolated central nervous system (CNS) of the lubber grasshopper Taeniopoda eques were recorded and the change of ventilatory rates were measured in correlation to changing concentrations of oxygen and carbon dioxide. These in vitro responses were compared to the ventilatory rates of intact animals exposed to various gas tensions. We found highly significant effects of oxygen on the ventilatory response of both the in vitro CNS and the intact animals, with ventilatory rates inverse to the concentration of oxygen. Application of changing carbon dioxide concentrations showed significant effects on ventilatory frequencies in isolated CNS of the American desert locust (Schistocerca americana). Our results provide the first direct evidence for the existence of oxygen and carbon dioxide receptors located in the insect CNS. (C) 2002 Elsevier Science Inc. All rights reserved
Exploring the Trade-offs Between Incentives for Distributed Generation Developers and DNOs
No full textRegulators are aiming to incentivize developers and Distribution Network Operators to connect distributed generation (DG) to improve network environmental perform-ance and efficiency. A key question is whether these incentives will encourage both parties to connect DG. Here, multi-objective optimal power flow is used to simulate how the par-ties’ incentives affect their choice of DG capacity within the limits of the existing network. Using current UK incentives as a basis, this paper explores the costs, benefits and trade-offs associated with DG in terms of connection, losses and, in a simple fashion, network deferral
- …
