1,216 research outputs found
Robert Shelton, T. C. Davenport, and Leroy Sykora
No full textLooking over pamphlets describing the CIO Communications Workers of America\u27s stand in present contract negotiations with Southwestern Bell Telephone Company are, left to right, Robert Shelton, strike information chairman for Local 6201 at Fort Worth; T. C. Davenport, president of the CWA local, and Leroy Sykora, city strike director.https://mavmatrix.uta.edu/specialcollections_startelegram1950s/27465/thumbnail.jp
Transformations of node-balanced routing problems
No full textThis paper describes a polynomial transformation for a class of unit-demand vehicle routing problems, named node-balanced routing problems (BRP), where the number of nodes on each route is restricted to be in an interval such that the workload across the routes is balanced. The transformation is general in that it can be applied to single or multiple depot, homogeneous or heterogeneous fleet BRPs, and any combination thereof. At the heart of the procedure lies transforming the BRP into a generalized traveling salesman problem (GTSP), which can then be transformed into a traveling salesman problem (TSP). The transformed graph exhibits special properties which can be exploited to significantly reduce the number of arcs, and used to construct a formulation for the resulting TSP that amounts to no more than that of a constrained assignment problem. Computational results on a number of instances are presente
A Theoretical Investigation of the Effect of the Stochasticity in the Material Properties on the Chatter Detection During Turning
No full textIn this work the effect of the inhomogeneous material properties are investigated in regenerative turning processes by introducing white noise in the cutting coefficient. The model is a one degree of freedom linear delayed oscillator with stochastic parameters. A full discretization method is used to calculate the time evolution of the second moment to determine the moment stability of the turning process. The resultant stability chart is compared with the deterministic turning model.</jats:p
Smicridea (Smicridea) sattleri Denning & Sykora 1968
No full textSmicridea (Smicridea) sattleri Denning & Sykora, 1968 Fig. 17B Smicridea sattleri Denning & Sykora, 1968: 175 (type locality: Brazil, Sao Paulo, waterfall on Iporanga Beach, Guaruja Island near Santos; CAS; ♂). Smicridea sattleri – Paprocki et al. 2004: 10 (checklist). — Calor 2011: 321 (checklist). — Paprocki & França 2014: 38 (checklist). — Rocha et al. 2016: 429 (distribution). — Holzenthal & Calor 2017: 182 (catalog). Material examined BRAZIL – Bahia • 1 ♂; Camacan, Reserva Particular do Patrimônio Natural Serra Bonita; 15°22′59.1″ S, 39°33′21.2″ W; 2Aug. 2010; N. Hamada, R. Querino and R. Boldrini leg.; INPA • 1 ♂; Camacan, Reserva Particular do Patrimônio Natural Serra Bonita, Córrego Fechadinho; 15°23′9.1″ S, 39°33′21.2″ W; 27 Nov. 2011; A.R. Calor leg.; UV light pan trap; UFBA • 5 ♂♂; Wesceslau Guimarães, E.E.E.W.G. Riacho Serra Grande, Cachoeira; 13°35′35.4″ S, 39°42′51.2″ W; 513 m a.s.l.; 6 Sep. 2013; A.R. Calor, T. Duarte and E.S. Dias leg.; entomological net; UFBA • 1 ♂; same collection data as for preceding; 7 Sep. 2013; UV light pan trap; UFBA • 2 ♂♂; same collection data as for preceding; 8 Sep. 2013; UFBA – Espírito Santo • 3 ♂♂; Espírito Santo, Alegre, Cachoeira da Fumaça, trilha do remanso; 20°37′52.1″ S, 41°36′18.8″ W; 27 May 2011; J.M.C. Nascimento, P. Barcelos-Silva, K. Angeli and K. Bertazo leg.; white sheet with an LED light; INPA • 2 ♂♂; Fundão, Timbuí, Hotel Fazenda Monte Sião; 19°56′02.0″ S, 40°24′45.0″ W; 57 m a.s.l.; Sep. 2014; P. Barcelos-Silva leg.; Malaise trap; INPA • 1 ♂; Santa Leopoldina, Rio da Prata, acima da cachoeira Véu da Noiva; 20°02′49.7″ S, 40°31′55.9″ W; 487 m a.s.l.; 3 Apr. 2011; L.L. Dumas and J.L. Nessimian leg.; DZRJ • 3 ♂♂; Santa Teresa, REBIO Santa Lúcia; 9–10 Jan. 2013; A.L. Carvalho leg.; DZRJ • 6 ♂♂; Santa Teresa, REBIO Santa Lúcia, Córrego Bonito, acima da Cachoeira Heloísa Torres; 19°58′25.9″ S, 40°31′46.3″ W; 695 m a.s.l.; 3Apr. 2011; L.L. Dumas and G.A. Jardim leg.; DZRJ. Distribution (Fig. 17B) Brazil: Atlantic Forest (Bahia [new record], Espírito Santo [new record], São Paulo [Denning & Sykora 1968]), Cerrado (Minas Gerais [Rocha et al. 2016]).Published as part of Desiderio, Gleison Robson, Pes, Ana Maria, Andrade-Souza, Vanderly & Hamada, Neusa, 2021, The Smicridea (Smicridea) fasciatella species group (Trichoptera: Hydropsychidae) in Brazil: six new species and new distributional records, pp. 156-196 in European Journal of Taxonomy 750 (1) on page 189, DOI: 10.5852/ejt.2021.750.1371, http://zenodo.org/record/545171
Color superconductor with a color sextet condensate
No full textBrauner T, Hosek J, Sykora R. Color superconductor with a color sextet condensate. Phys.Rev. 2003;68(9): 94004
Systematic matrix formulation for efficient computational path integration
No full textIn this work we introduce a novel methodological treatment of the numerical path integration method, used for computing the response probability density function of stochastic dynamical systems. The method is greatly accelerated by transforming the corresponding Chapman-Kolmogorov equation to a matrix multiplication. With a systematic formulation we split the numerical solution of the Chapman-Kolmogorov equation into three separate parts: we interpolate the probability density function, we approximate the transitional probability density function of the process and evaluate the integral in the Chapman-Kolmogorov equation. We provide a thorough error and efficiency analysis through numerical experiments on a one, two, three and four dimensional problem. By comparing the results obtained through the Path Integration method with analytical solutions and with previous formulations of the path integration method, we demonstrate the superior ability of this formulation to provide accurate results. Potential bottlenecks are identified and a discussion is provided on how to address them
Stochastic semi‐discretization for linear stochastic delay differential equations
No full textAn efficient numerical method is presented to analyze the moment stability and stationary behavior of linear stochastic delay differential equations. The method is based on a special kind of discretization technique with respect to the past effects. The resulting approximate system is a high dimensional linear discrete stochastic mapping. The convergence properties of the method is demonstrated with the help of the stochastic Hayes equation and the stochastic delayed oscillator
Simulating Storage Policies for an Automated Grid-Based Warehouse System
No full textBeckschäfer M, Malberg S, Tierney K, Weskamp C. Simulating Storage Policies for an Automated Grid-Based Warehouse System. In: Bektaş T, Coniglio S, Martinez-Sykora A, Voß S, eds. Computational Logistics: 8th International Conference, ICCL 2017, Southampton, UK, October 18-20, 2017, Proceedings. Lecture Notes in Computer Science. Vol 10572. Cham: Springer International Publishing; 2017: 468-482
Integrating Fleet Deployment into the Liner Shipping Cargo Allocation Problem
No full textMüller D, Guericke S, Tierney K. Integrating Fleet Deployment into the Liner Shipping Cargo Allocation Problem. In: Bektaş T, Coniglio S, Martinez-Sykora A, Voß S, eds. Computational Logistics: 8th International Conference, ICCL 2017, Southampton, UK, October 18-20, 2017, Proceedings. Lecture Notes in Computer Science. Vol 10572. Cham: Springer International Publishing; 2017: 306-320
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