19,706 research outputs found
q-Differential equations for q-classical polynomials and q-Jacobi-Stirling numbers
No full textWe introduce, characterise and provide a combinatorial interpretation for the so-called q-Jacobi–Stirling numbers.
This study is motivated by their key role in the (reciprocal) expansion of any power of a second order
q-differential operator having the q-classical polynomials as eigenfunctions in terms of other even order operators,
which we explicitly construct in this work. The results here obtained can be viewed as the q-version of
those given by Everitt et al. and by the first author, whilst the combinatorics of this new set of numbers is a
q-version of the Jacobi–Stirling numbers given by Gelineau and the second author
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Network Q
No full textA press release from Network Q announcing that they will begin featuring Brian McNaught, a gay columnist and author, for a monthly segment
Network Q
No full textA press release from Network Q announcing that they will begin featuring Brian McNaught, a gay columnist and author, for a monthly segment
Tobin's Q and Financial Policy
No full textRecent research in macroeconomics has emphasized the importance of linking the financial and real sectors and the need for working with optimizing models. Tobin’s Q model of investment would appear to provide a framework that can satisfy these two criteria. In contrast to the original presentation of the Q model, the formal development has not recognized that the firm actively participates in a number of financial markets; in this broader context, we show that Q is likely to be an uninformative and possibly misleading signal for investment expenditures . We then endeavor to turn this negative theoretical result to positive advantage in resolving a number of empirical problems with Q models, but the modifications dictated by the theory receive little support from the data.
An investigation of emerin and nuclear lamins: : Interactions, distribution, and role in cell cycle regulation, in cells derived from EDMD patients.
No full textEmery Dreifuss muscular dystrophy (EDMD) is caused by mutations either in the gene encoding emerin or in the gene encoding A-type lamins (lamins A and C). Several roles for emerin and A-type lamins have been proposed, including their involvement in nuclear structure, gene expression, cell cycle progression, and DNA replication. However, their functions are poorly understood and thus the mechanisms by which mutations cause different inherited diseases are not clear. In this project, the endogenous and exogenous distribution of emerin, and A- and B-type lamins in lymphoblasts and fibroblasts carrying mutations in emerin and A-type lamins have been investigated. For this purpose, anybodies against emerin, and A- and B-type lamins as well as GFP-, and DsRed- tagged fusion proteins (GFP-emerin, GFP-lamin A, and DsRed-lamin C) were used. From the immunofluorescence microscopy results of lymphoblasts, it is suggested that the distribution of emerin and lamins is possibly affected in these cells in EDMD. However, in fibroblasts there was no evidence of structural abnormality for the proteins investigated. The effects of emerin and A-type lamins mutations on growth and progression of cells through the cell cycle have also been investigated in fibroblasts of EDMD patients, using flow cytometry. The results obtained here suggest that emerin and lamin mutations may cause a cell cycle arrest at the G0 phase of the cycle
Camponotus hesperius Emery
No full text17. Camponotus hesperius Emery (2, w q; 5, w; 6, w q; 9, w; 10, w q; 11, w; 12, w; 13, w q; 16, w; 24, w q; 25, w; 27, w). This big and beautiful shining species is usually found from mid to high altitude, up to 1300 m, the lowest point at 200 m. Usually soil nesting, it can be found under stones also in very humid spots on volcanic charcoal.Published as part of Espadaler, X., 2007, The ants of El Hierro (Canary Islands)., pp. 113-127 in Advances in ant systematics (Hymenoptera: Formicidae): Homage to E. O. Wilson - 50 years of contributions., Memoirs of the American Entomological Institute, 80 on page 12
Camponotus feai Emery
No full text16. Camponotus feai Emery (3, w; 8, w q; 14, w, q; 18, w; 22, w q; 28, w q; 35, w q; 36, w; 38, w; 39, w; 40, w; 41, w; 42, w; 43, w). Low to mid altitude species: sea level to 1000 m (a southern, very dry slope). All populations from El Hierro belong to the homogeneous black phenotype; some populations from other islands show a remarkable variation in color of head and thorax, from pure black to a splendid red.Published as part of Espadaler, X., 2007, The ants of El Hierro (Canary Islands)., pp. 113-127 in Advances in ant systematics (Hymenoptera: Formicidae): Homage to E. O. Wilson - 50 years of contributions., Memoirs of the American Entomological Institute, 80 on page 12
A Q-learning based multi-strategy integrated artificial bee colony algorithm with application in unmanned vehicle path planning
No full textArtificial bee colony (ABC) is a prominent algorithm that offers great exploration capabilities among various meta-heuristic algorithms. However, its monotonous and one-dimensional search strategy limits its searching performance in the solving process. Thus, to address this issue, a Q-learning based multi-strategy integrated ABC algorithm (QMABC) is proposed. In the QMABC, multiple search strategies are proposed to utilize different individual experiences and search approaches for solution updates. Then, Q-learning is employed for strategy selection. In comparison to previous studies, this paper introduces more effective state and action configurations within the framework of Q-learning. To evaluate the performance of the QMABC, CEC 2017 benchmark functions are adopted to compare it to different meta-heuristic algorithms including ABC based and non-ABC based algorithms. Moreover, applications in path planning are implemented to further verify the effectiveness of the QMABC. Overall, it should be highlighted that the proposed QMABC demonstrates superiority in both numerical and practical experiments.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.Discrete Mathematics and Optimizatio
Acanthostichus quadratus Emery 1895
No full textAcanthostichus quadratus Emery, 1895b: 750, Taf. 16, Fig. 5, 6; Taf. 17, Fig. 12, w, q. Current status: Acanthostichus quadratus (s/f Dorylinae). Type locality(-ies): “Aus Bolivian und Amazonas ”. Original Karawajew labels: 1 w, “ Bolivia ”, “ Acanthostichus / (Acanthostichus) / quadratus Em. / Det. Emery”. Material: PARALECTOTYPE, 1 w (CASENT 0916794) (Box 1). Notes. Mackay (1996) designated lectotype (worker) of A. quadratus from “Amazonas” (probably Brazil).Published as part of Radchenko, Alexander G., Fisher, Brian L., Esteves, Flavia A., Martynova, Ekateryna V., Bazhenova, Tatyana N. & Lasarenko, Svetlana N., 2023, Ant type specimens (Hymenoptera, Formicidae) in the collection of Volodymyr Opanasovych Karawajew. Communication 1. Dorylinae, Poneromorpha and Pseudomyrmecinae, pp. 1-32 in Zootaxa 5244 (1) on page 12, DOI: 10.11646/zootaxa.5244.1.1, http://zenodo.org/record/764572
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