5,027 research outputs found
Arachnis picta subsp. verna Barnes & Mc Dunnough 1918
No full textArachnis picta verna Barnes & Mc Dunnough, 1918 Arachnis picta verna Barnes & Mc Dunnough, 1918: 90. TYPE LOCALITY. — [USA], Calif [ornia], Three Rivers, Tulare Co[unty]. TYPE SPECIMENS. — Described from 3 male and 6 female syntypes (USNM).Published as part of Laguerre, Michel, 2014, Catalogue of the Neotropical Arctiini Leach, [1815] (except Ctenuchina Kirby, 1837 and Euchromiina Butler, 1876) (Insecta, Lepidoptera, Erebidae, Arctiinae), pp. 137-533 in Zoosystema 36 (2) on page 409, DOI: 10.5252/z2014n2a1, http://zenodo.org/record/539534
Interactively using Semantic Web knowledge: Creating scalable abstractions with FacetOntology
No full textThe amount of knowledge accessible on the Semantic Web is growing, and there is a need for a scalable solution to facilitate exploring that data. Currently approaches to exploring Semantic Web data either focus on exploring resources individually, following links during exploration, and making little use of collated data, or take the approach of collating and aligning multiple sources into one store for one purpose, and hand-crafting a specific browsing interface onto it. We present an approach that provides a scalable browsing interface, which can browse knowledge from the Semantic Web at will. Our approach creates abstractions of knowledge, collated into facets, which are described using FacetOntology. FacetOntology facilitates describing facets from RDF data, suitable for use in creating datasets for faceted browsing
Growth Morphologies and Mechanisms of Non-Equilibrium Solidified MC Carbide
No full textGrowth morphologies and mechanisms of the carbide of group IVB and VB elements (MC carbide), a typical faceted crystal, were studied with an estimated cooling rate from 102 to 105 K/s. Results showed that although the growth morphologies of the MC carbide vary remarkably with solidification cooling rate, the solid/liquid interface is always atomically smooth, and the growth mechanisms are always lateral growth. The growth mechanism transition from lateral to continuous growth mode, which was predicted by the classic crystal growth theory, was not observed for the TiC type MC carbide within the estimated cooling rate range of 102?105 K/s
Ruth Klüger: la creatività per non “smarrirsi strada facendo”
No full textR. Klüger, a jewish viennese, a US citizen and a germanist, is the Author of two autobiographies “weiter leben”and “unterwegs versore”. Written in a style which alternates between essay and poetry, account and recollection, they are the occasion for the Author to establish a dialogue with the women having as a focus the exchange of experiences and reflections over the status of the feminine emancipation
Eutectic MC Carbide Growth Morphologies of a Laser Clad TiC/FeAl Composite Coating
No full textIn this paper, eutectic MC carbide growth morphology and its evolution with laser scanning speed were studied comprehensively of a laser clad MC carbide reinforced FeAl intermetallic matrix composite coating. As the laser scanning speed increased, the growth morphology of eutectic MC carbide was found to be needle-aligned annulation, butterfly-like and well-developed dendrite
Performance analysis of the MC-CDMA system in frequency selective slow Rayleigh fading channels, DS-CDMA or MC-CDMA?
No full textThis report describes the Bit Error Probability (BEP) performance of Multi-Carrier Code Division Multiple Access (MC-CDMA) system using the RAKE-receiver in frequency selective slow Rayleigh fading channels. The analysis has been carried out by a theoretical approach using the characteristic function method for quadratic form of Gaussian random variables and by computer simulation. The BEP performance of Direct Sequence Code Division Multiple Access (DS-CDMA) system under the same conditions is analysed and compared with the BEP performance of the MC-CDMA system.Electrical Engineering, Mathematics and Computer ScienceTelecommunicatie- en Verkeersbegeleidingssysteme
Recovery of copper from PCB leach solution by solvent extraction
No full textDiscarded computers, mobiles and other consumer electronics (e-waste) are the fastest growing portion of the present day waste stream and are considered hazardous wastes due to the presence of several toxic metals. However such waste can be considered as valuable resource several valuable metals like copper, silver, gold etc. In the present study attempts have been made to recover copper from the leach solution of electronic wastes particularly from PCBs of computers and mobile phones. The metal rich concentrate obtained from the beneficiation circuit is leached in sulphuric acid to dissolve different metals such as copper, zinc, nickel, aluminium, iron etc. The leach liquor obtained contained 23.98 g/l Cu, 0.26 g/l Ni, 0.003 g/l Co, 1.7 g/l Zn, 0.0035 g/l Cd, 0.9 g/l Fe. This solution was further subjected to solvent extraction using LIX 84IC and Acorga M 5640 for the separation and recovery of Cu selectively from the leach solution. Various parameters were studied to optimize the conditions for maximum extraction of copper by both the solvents and their extraction efficiency has been compared. The Mc-Cabe Thiele plot shows the requirement of three stages with O/A ratio of 2:1 for quantitative extraction of copper from the leach liquor at pH 1.7 with 25% LIX 84IC. The counter current simulation studies with O/A ratio of 2:1 up to six stage shows almost complete extraction of copper along without co-extraction of other metals. Finally stripping of copper from the loaded organic phase was performed at different concentration of H2SO4 (2.5–15%, v/v). The stripping efficiency is increased with increasing sulphuric acid concentration
Dynamics of Network Formation Processes in the Co-Author Model
No full textThis article studies the dynamics in the formation processes of a mutual consent network in game theory setting: the Co-Author Model. In this article, a limited observation is applied and analytical results are derived. Then, 2 parameters are varied: the number of individuals in the network and the initial probability of the links in the network in its initial state. A simulation result shows a finding that is consistent with an analytical result for a state of equilibrium while it also shows different possible equilibria.Dynamics, Network, Game Theory, Model,Simulation, Equilibrium, Complexity
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