200,412 research outputs found
Interview with Thor Ronningen
No full textThor Ronningen was inducted into the U.S. Army on July 15, 1943. He completed basic training at Fort Benning, Georgia and the Army Specialized Training Program in engineering at Arkansas State College. He joined the 99th Infantry Division at Camp Maxie, Texas and was deployed to Europe, landing at Plymouth, England. Ronningan first engaged in combat on December 16, 1944 near the Siegfried Line in Germany. He fought the Battle of the Bulge in Germany, Belgium and France until he was wounded in March of 1945. He was recuperating in a Hospital in England when the war in Europe ended
THz Communications and the Demonstration in the ThoR-Backhaul Link
No full textSpecial Issue on Selected Emerging Trends in Terahertz Science and TechnologyInternational audienceThis paper provides a brief overview on THz communications and subsequently focuses on the application of 300 GHz backhaul and fronthaul links. The fundamentals, planning and software simulation approaches as well as the realized bi-directional 300 GHz demonstrator built within the Horizon 2020 joint EU-Japan project ThoR are described. The ThoR demonstrator uses off-the-shelf modems for network connections and baseband processing, RF front-ends based on InGaAs mHEMT technology and a spurious-free/low-phase noise photonic solution for LO generation. With the ThoR set-up a net data rate of 2 x 20 Gbps over a distance of 150 m using a total instantaneous bandwidth of 8.64 GHz has been demonstrated. It is also shown that the IEEE Std 802.15.3-2023 protocol works correctly for this applicatio
Be He Worthy: Thor's Journey from Edda to Avenger
Get PDFThere's just something about heroes. Through time people have followed their exploits through stories, found inspiration through them we learn about ourselves. Their names have changed as time goes on Achilles, Theseus, and Rama. They gave way to superman, batman, and the Hulk. The heroes and gods of our past are just that past but what does it say about a culture when it turns a hero from their past into one the modern world's mightiest heroes. This paper will explore how Thor made the journey from a god of legends to a modern day superhero
THOR 2.0: Major Improvements to the Open-Source General Circulation Model
Get PDFTHOR is the first open-source general circulation model (GCM) developed from scratch to study the atmospheres and climates of exoplanets, free from Earth- or Solar System-centric tunings. It solves the general non-hydrostatic Euler equations (instead of the primitive equations) on a sphere using the icosahedral grid. In the current study, we report major upgrades to THOR, building upon the work of Mendonça et al. (2016). First, while the Horizontally Explicit Vertically Implicit (HEVI) integration scheme is the same as that described in Mendonça et al. (2016), we provide a clearer description of the scheme and improved its implementation in the code. The differences in implementation between the hydrostatic shallow (HSS), quasi-hydrostatic deep (QHD) and non-hydrostatic deep (NHD) treatments are fully detailed. Second, standard physics modules are added: two-stream, double-gray radiative transfer and dry convective adjustment. Third, THOR is tested on additional benchmarks: tidally-locked Earth, deep hot Jupiter, acoustic wave, and gravity wave. Fourth, we report that differences between the hydrostatic and non-hydrostatic simulations are negligible in the Earth case, but pronounced in the hot Jupiter case. Finally, the effects of the so-called "sponge layer", a form of drag implemented in most GCMs to provide numerical stability, are examined. Overall, these upgrades have improved the flexibility, user-friendliness, and stability of THOR
An annotated checklist and bibliography of lichens and lichenicolous fungi of Libya
No full textAll literature about lichens and lichenicolous fungi in Libya is presented. A checklist compiled from literature up to 1950 includes 151 taxa. Based on field work in 1982 and 1983 conducted by A. Anderberg and G. Thor, an additional 54 species new to Libya were collected of 46 are reported here as new, Acarospora nodulosa, Arthonia calcicola, A. pruinata, Arthrosporum populorum, Aspicilia cheresina, Caloplaca cerinelloides, C. haematites, C. marmorata, C. oasis, C. polycarpoides, C. tenuata, C. ulcerosa, Candelariella reflexa, C. senior, Catillaria detractula, Cladonia firma, C. foliacea, Clypeococcum epicrassum, Collema coccophorum, Diploicia canescens, Fulgensia subbracteata, Intralichen lichenicola, Lecania cyrtella, L. turicensis, Lecanora argentata, L. hagenii, L. horiza, Lecidella laureri, Lichenoconium lecanorae, Milospium graphideorum, Ochrolechia turneri, Physcia abscendens, P. biziana, Physciona grisea, Placopyrenium trachyticum, Pyrrhospora quernea, Rinodina oleae, R. pyrina, Sagiolechia protuberans, Sphaerellothecium parietinarium, Stigmidium tabacinae, Toninia subfuscae, Xanthoria calcicola, X. mediterranea, Xanthoriicola physciae and Zwackhiomyces coepulonus. Given the large territory, the geological heterogeneity, the long coastline, the presence of up to 900 m high mountains near the coast, the at least seminatural lichen habitats still present, the high percentage of species new to Libya in the collections made in 1982 and 1983 (54 out of 87 = 62%) as well as field experience suggest that a realistic estimate of the total number of Libyan lichens and lichenicolous fungi exceeds 1,000 species. © 2010 Adac
The Galactic ionized gas seen with THOR
No full textWe present the 21cm continuum emission observed with the THOR survey (The HI/OH/Recombination line survey of the Milky Way) covering the whole inner Milky Way from 14.5 to 67.4 deg in Galactic longitude and 1:25 deg in Galactic latitude. These data provide a detailed view on the compact as well as extended radio emission of our inner Galaxy and thousands of extragalactic background sources. Investigating the distribution and spectral indices of the identified continuum sources with the THOR data allows us to characterize the physical properties of the sources
The THOR + HELIOS general circulation model: multiwavelength radiative transfer with accurate scattering by clouds/hazes
Get PDFGeneral circulation models (GCMs) provide context for interpreting multiwavelength, multiphase data of the atmospheres of tidally locked exoplanets. In the current study, the non-hydrostatic THOR GCM is coupled with the HELIOS radiative transfer solver for the first time, supported by an equilibrium chemistry solver (FastChem), opacity calculator (HELIOS-K), and Mie scattering code (LX-MIE). To accurately treat the scattering of radiation by medium-sized to large aerosols/condensates, improved two-stream radiative transfer is implemented within a GCM for the first time. Multiple scattering is implemented using a Thomas algorithm formulation of the two-stream flux solutions, which decreases the computational time by about 2 orders of magnitude compared to the iterative method used in past versions of HELIOS. As a case study, we present four GCMs of the hot Jupiter WASP-43b, where we compare the temperature, velocity, entropy, and streamfunction, as well as the synthetic spectra and phase curves, of runs using regular versus improved two-stream radiative transfer and isothermal versus non-isothermal layers. While the global climate is qualitatively robust, the synthetic spectra and phase curves are sensitive to these details. A THOR + HELIOS WASP-43b GCM (horizontal resolution of about 4 deg on the sphere and with 40 radial points) with multiwavelength radiative transfer (30 k-table bins) running for 3000 Earth days (864 000 time-steps) takes about 19–26 d to complete depending on the type of GP
Das Friedrichs-Thor zu Cassel
No full textDAS FRIEDRICHS-THOR ZU CASSEL
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Lebertia (Lebertia) glabra Thor 1897
No full textLebertia (Lebertia) glabra Thor, 1897 Lebertia glabra Thor, 1897: E. Angelier et al. 1985: 30. Lebertia lineata Thor, 1906: Mota¸s 1927b: 2, 1928e: 4, 1928f: 157; K. Viets 1952c: 245; E. Angelier 1953b: 68; Vaillant 1956: 156; Schwoerbel 1959a: 16; M.-L. Angelier 1980: 13; Smit & Van der Hammen 1992: 55. Pseudolebertia glabra (Thor, 1897): Hubault 1927: 98. New record. Gard: 0/2/0, Monts du Cantal, rheocrene Buron des Gardes, 45°04’084” N, 2°45’355” E, alt. 1494 m a.s.l., 17.05.2005, leg. H.Smit. Distribution in France: Gard, Haut-Rhin, IsŁre, Meurthe-et-Moselle, Pas-de-Calais, PyrØnØes (Hautes-PyrØnØes).Published as part of Smit, H. & Gerecke, R., 2010, A CHECKLIST OF THE WATER MITES OF FRANCE (ACARI: HYDRACHNIDIA) Harry S and Reinhard G, pp. 21-91 in Acarologia 50 (1) on page 38, DOI: 10.1051/acarologia/20101952, http://zenodo.org/record/539229
THOR: Global Circulation Model for planetary atmospheres
No full textTHOR solves the three-dimensional nonhydrostatic Euler equations. The code implements an icosahedral grid for the poles where converging meridians lead to increasingly smaller time steps; irregularities in the grid are smoothed using spring dynamics. THOR is designed to run on graphics processing units (GPUs) and is part of the open-source Exoclimes Simulation Platform
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