1,356,014 research outputs found
Shape sensitivity analysis of the work functional for the compressible Navier–Stokes equations
No full textInternational audienceThe compressible Navier–Stokes equations with nonhomogeneous Dirichlet conditions in a bounded domain with an obstacle are considered (P.I. Plotnikov, J. Sokolowski, Compressible Navier-Stokes Equations. Theory and Shape Optimization, Birkhäuser, Basel, 2012). The dependence of local solutions on the shape of an obstacle is analyzed (P.I. Plotnikov, E.V. Ruban, J. Sokołowski, SIAM J. Math. Anal. 40:1152–1200, 2008; P.I. Plotnikov, E.V. Ruban, J. Sokołowski, J. Math. Pures Appl. 92:113–162, 2009; P.I. Plotnikov, J. Sokołowski, Dokl. Akad. Nauk 397:166–169, 2004; P.I. Plotnikov, J. Sokołowski, J. Math. Fluid Mech. 7:529–573, 2005; P.I. Plotnikov, J. Sokołowski, Comm. Math. Phys. 258:567–608, 2005; P.I. Plotnikov, J. Sokołowski, SIAM J. Control Optim. 45:1165–1197, 2006; P.I. Plotnikov, J. Sokołowski, Uspekhi Mat. Nauk 62:117–148, 2007; P.I. Plotnikov, J. Sokołowski, Stationary boundary value problems for compressible Navier-Stokes equations, in Handbook of Differential Equations: Stationary Partial Differential Equations, vol. VI, Elsevier/North-Holland, Amsterdam, 2008, pp. 313–410; P.I. Plotnikov, J. Sokołowski, SIAM J. Control Optim. 48:4680–4706, 2010; P.I. Plotnikov, J. Sokołowski, J. Math. Sci. 170:34–130, 2010). The shape derivatives (J. Sokołowski, J.-P. Zolésio, Introduction to Shape Optimization. Shape Sensitivity Analysis, Springer, Berlin/Heidelberg/New York, 1992) of solutions to the compressible Navier–Stokes equations are derived. The shape gradient (J. Sokołowski, J.-P. Zolésio, Introduction to Shape Optimization. Shape Sensitivity Analysis, Springer, Berlin/Heidelberg/New York, 1992) of the work functional is obtained. In this way the framework for numerical methods of shape optimization (P. Plotnikov, J. Sokołowski, A. Żochowski, Numerical experiments in drag minimization for compressible Navier-Stokes flows in bounded domains, in Proceedings of the 14th International IEEE/IFAC Conference on Methods and Models in Automation and Robotics, MMAR’09, 2009, 4 pp; A. Kaźmierczak, P.I. Plotnikov, J. Sokołowski, A. Żochowski, Numerical method for drag minimization in compressible flows, in 15th International Conference on Methods and Models in Automation and Robotics (MMAR), pp. 97–101, 2009
Data for: Data on Post Bank customer reviews from Web
No full textThe xls document describes a set of 16659 customer reviews from the Internet regarding the Post Bank. The website banki.ru acted as a data source. We compiled the dataset to monitor the level of trust of bank customers in its banking service. The data presents text reviews for 2013 - 2019 and includes, with or without ratings
AgriBank users reviews from Web
No full textThe Dataset contains collected reviews (N=10441) about Russian Agricultural Bank (https://www.banki.ru/services/responses/list/) (2006-2020 period). In the Dataset included only those reviews that contain ratings, reviews without ratings were ignored. 'Responses_header' and 'responses_message' columns are translated text from Russian to English via the Google translator API. 'r_v_c_4' are clusters by features are 'raiting_summary_normal', 'responses_rating_grade', 'views', 'comments'; numbers indicate the optimal number of clusters.
Acknowledgments
The reported study was funded by RFBR, project number 20-310-70042
Replication Data for: Analyzing GPT-4 Misinterpretations of Russian Grammatical Constructions
No full textGPT-4 interpretations of the dataset of 2,227 examples gathered from Russian Constructicon (https://constructicon.github.io/russian/
Plotnikov Alleged – a Boost to the International Promotion of Croatian Science Represented by the Technical Faculty
No full textDaje se sustavni prikaz navodne pojave longitudinalnog raspršenja svjetlosti. Tu je pojavu prvi uočio Plotnikov, pa je nazvana Plotnikovljevim učinkom. Pojava se prezentira od početnih zabluda do konačnoga osporavanja. U uvodu se daje prikaz Zeemanova, Starkova, Comptonova, Ramanova i lažnoga Plotnikovljeva učinka. Opisuju se i događanja u svijetu i Zagrebu povezana s Ramanovim i Plotnikovljevim efektom. Dokumentirano se iznose podaci o Šplaitovoj disertaciji na Tehničkom fakultetu u Zagrebu te pisana polemika između Šplaita s jedne i Katalinića i Vrkljana s druge strane. Ističe se i Katalinićev osvrt na članke R. S. Krishnana i S. M. Mitre, indijskih fizičara koji su bili sljedbenici nobelovca C.V. Ramana i koji nisu potvrdili Plotnikova. Plotnikovljev učinak prepoznat je kao Mieov učinak, poznat od prije. Plotnikovljev učinak znatno je utjecao na aktivnosti i na istraživalački rad hrvatskih fizičara, biologa i fiziologa, ali i stranih renomiranih fizičara i kemičara. Taj je učinak potaknuo i aktivno učešće fizičara Katalinića na međunarodnom znanstvenom skupu u Parizu 1937. godine, gdje je nastupio kao dopisni član Jugoslavenske akademije znanosti i umjetnosti.A comprehensive account is given of the alleged phenomenon of longitudinal light scattering, a phenomenon first detected by Plotnikov and named after him the Plotnikov effect. The subject matter is presented from the initial delusion to the final refutation. The introduction describes the Zeeman, Starkov, Compton, Raman and the deceptive Plotnikov effects. Developments in Zagreb and abroad associated with the Raman and the deceptive Plotnikov effect are also discussed. Documented information is provided on Šplait’s dissertation at the Technical Faculty in Zagreb and a written polemics between Šplait on one side and Katalinić and Vrkljan on the other. Katalinić’s review of articles by R.S. Krishnan and S.M. Mitra, the Indian physicists, the followers of Nobel laureate C.V. Raman, who would not confirm Plotnikov’s alleged finding, is included as well. The Plotnikov effect was identified as the earlier known Mie effect. The Plotnikov effect greatly influenced the thinking and research work of Croatian physicists, biologists and physiologists, and some distinguished foreign physicists and chemists. It was also the topic with which physicist Katalinić took an active part at the International Scientific Symposium in Paris in 1937 as corresponding member of the Yugoslav Academy of Sciences and Arts
Ressources en eaux souterraines : classification et méthodes d'évaluation, de N. A. Plotnikov
No full textChartier Marcel M. Ressources en eaux souterraines : classification et méthodes d'évaluation, de N. A. Plotnikov. In: Annales de Géographie, t. 75, n°409, 1966. pp. 310-312
The need for specific approach towards informing members of marginalised groups of their rights: practitioner’s reflections
No full textPlotnikov O. V. The need for specific approach towards informing members of marginalised groups of their rights: practitioner’s reflections / O. V. Plotnikov // ECHR’s Jurisprudence in Digital Era : proceedings of the Int. sci. conf. (Odesa, May 31 – June 1, 2019) / MES of Ukraine, Nat. Univ. “Odes. Acad. of Law”, SRC NALSU ; exec. eds. H. A. Ulianova, V. A. Tuliakov. – Odesa : Publishing house “Helvetika”, 2019. – P. 145-148
Global solution to a quasistationary Penrose-Fife model
No full textIn this paper we prove the existence of a global solution to the quasistationary phase field model of Penrose-Fife type. For the proof we combine a time discretization of the system with some a priori estimates, one of which is unusual. The passage to the limit is based on an appropriate compactness argument, which has been especially devised for this problem
A simplified Bixon-Jortner-Plotnikov method for fast calculation of radiationless transfer rates in symmetric molecules
No full textA simplified form of the Bixon-Jortner-Plotnikov (BJP) method is derived for calculation of internal conversion (IC) rate in a symmetrical molecule. The rate is a sum of contributions from individual transitions between vibronic states. For each transition, vibrational modes are divided into two groups, the promoting (one or two modes per electronic transition) and the surrounding ones. In the case of the non-totally symmetric transition in a symmetric molecule, the overwhelming majority of transitions do not contribute to the overall rate. Moreover, the promoting and surrounding modes belong to different symmetry representations and can be separated. It is proposed to deal with the promoting modes directly, while approximating the effect of the surrounding modes by a Pekarian function. The method was tested on polyacenes and it was shown that the calculated IC rates are in agreement with the experimental ones. The simplified method can be applied for calculating the rates of non-totally symmetric transition in a symmetric molecule, if its point symmetry group does not change after transition
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