859 research outputs found
Perigrapha (Perigrapha) yasawii Volynkin, Titov & Knyazev, sp. n.
No full textPerigrapha (Perigrapha) yasawii Volynkin, Titov & Knyazev, sp. n. (Figs 1–3, 11, 12) Type material. Holotype: male, 14.iv. 2014, S Kazakhstan, South Kazakhstan Region, 39 km WSW of Turkestan city, Syrdarya river valley, h= 180 m, N 43 ° 10.006 ’, E 67 ° 50.389 ’, at light. Volynkin A.V., Titov S.V. & Knyazev S.A. leg. Slide AV 1242 Volynkin (Coll. Zoological Institute, Russian Academy of Sciences, St. Petersburg, Russia [ZISP]). Paratypes: 26 males, with the same data as holotype (Colls A. Volynkin, Barnaul, Russia [AVB]; S. Knyazev, Omsk, Russia [SKO]; S. Titov, Pavlodar, Kazakhstan [STP]; ZISP); 1 male, Perovsk [S Kazakhstan, Kyzyl-Orda Region, vicinity of Kyzyl-Orda city], Syr-Darya reg., 2.iv. 1909, E. Miller [leg.] (Coll. ZISP). Slides AV 1230, AV 1243 Volynkin (males). Diagnosis. The new species belongs to P. circumducta complex of the P. i-cinctum ([Denis & Schiffermüller], 1775) species-group including P. sechuana G. Ronkay, L. Ronkay & Hacker, 2010, P. circumducta circumducta (Lederer, 1855) and P. circumducta pallescens (Draudt 1934) (Hreblay 1996; Ronkay et al. 2001; Ronkay et al. 2010). P. yasawii sp. n. (Figs 1–3) differs externally from P. circumducta circumducta (Figs 4–6) by its somewhat smaller size (wingspan of P. circumducta circumducta 42–53 mm), broader pectination of male antennae, more concolorous brownish-grey ground colour of forewings (in P. c. circumducta ground colour varies from reddishbrown to blackish-brown), pale subbasal area, pale subterminal area with narrower dark field outwards the postmeidal line, somewhat smaller orbicular stigma, more rounded reniform stigma, much narrower suborbicular patch and more greyish hindwings; from P. circumducta pallescens (Figs 7, 8) by its smaller size, broader pectination of male antennae, brownish-grey ground colour of forewings, more concolorous subterminal area with narrower dark field outwards the postmeidal line, more rounded reniform stigma, much narrower suborbicular patch and more greyish hindwings; from P. sechuana (Figs 9, 10) by its smaller size, narrower forewings, concolorous brownish-grey ground colour of forewings (in P. sechuana ground colour reddish-brown), paler subbasal area, pale subterminal area with narrower dark field outwards the postmeidal line, somewhat smaller orbicular stigma, more rounded reniform stigma, much narrower suborbicular patch and less unicolorous, more greyish hindwings with paler basal area. The male genitalia of P. yasawii sp. n. (Figs 11, 12) differ from those of P. circumducta (Figs 13) by the proximally broader, almost quadrangular uncus, more quadrangular juxta, broader clasper with shorter harpe and broader proximal part of ampulla; from P. sechuana (Fig. 14) by proximally broader, almost quadrangular uncus, broader clasper with shorter harpe, less asymmetrical and apically more dilated distal parts of valvae, longer aedeagus and much longer, less dorsally recurved vesica. Description. Adult (Figs 1–3). Male. Wingspan 37–43 mm. Antennae bipectinate, with long branches. Head, thorax and abdomen brownish-grey. Ground colour of forewing pale brownish-grey, medial area dark, greyishbrown, paler near the costal margin; antemedial and postmedial lines thin, dark grey; antemedial line almost straight, slightly curved near the costal margin; postmedial line almost straight, only arcuate around the cell; subterminal line indistinct; terminal area darker than subterminal; terminal line blackish, divided into short spots; orbicular and reniform stigmata and suborbicular patch being connected with reniform stigma with merged edges, pale greyish-ochreous, bordered with blackish; cilia grey. Hindwing greyish-brown; discal spot and medial line indistinct, dark; cilia dark grey. Female unknown. Male genitalia (Figs 11, 12). Uncus short, almost quadrangular, apically slightly rounded; tegumen short, weak; penicular lobes weak, narrow; juxta long, almost quadrangular; vinculum short, V-shaped; valva long, relatively narrow; cuculli long, straight, narrow, without pollex-like extensions, asymmetrical; distal part of left cucullus longer, apically narrower than that of right cucullus; ampulla long, slender, moderately curved, apically pointed; clasper short, distally strongly broadened, harpe very short; aedeagus very long, curved; vesica long, twisted, with subconical medial diverticulum with very small field of weak and short spinules, and large terminal field of spinules on broad diverticulum. Distribution and bionomics. The new species is known from two localities in South Kazakhstan. P. y as a w i i sp. n. inhabits dry shrubby river valleys (Fig. 15). Etymology. The species name is dedicated to Khodja Ahmed Yasawi, a Turkic poet and Sufi, whose mausoleum is in Turkestan city, less than 40 km from the type locality.Published as part of Volynkin, Anton V., Titov, Sergey V. & Knyazev, Svyatoslav A., 2014, A new Perigrapha Lederer, 1857 from South Kazakhstan (Lepidoptera, Noctuidae), pp. 292-296 in Zootaxa 3856 (2) on pages 292-296, DOI: 10.11646/zootaxa.3856.2.8, http://zenodo.org/record/22497
Gazoryctra ganna
No full textGazoryctra ganna (Hübner, [1808]) Fig. 1Published as part of Knyazev, S. A., Ivonin, V. V., Ustjuzhanin, P. Ya., Vasilenko, S. V. & Rogalyov, V. V., 2019, New data on Lepidoptera of West Siberian Plain, Russia, pp. 8-20 in Far Eastern Entomologist 386 on page 9, DOI: 10.25221/fee.386.2, http://zenodo.org/record/716484
Rayleigh-Ritz Majorization Error Bounds of Mixed Type
No full textThe absolute change in the Rayleigh quotient (RQ) for a Hermitian matrix with respect to vectors is bounded in terms of the norms of the residual vectors and the angle between vectors in [P. Zhu, M. E. Argentati, and A. V. Knyazev, SIAM J. Matrix Anal. Appl., 34 (2013), pp. 244-256]. We substitute multidimensional subspaces for the vectors and derive new bounds of absolute changes of eigenvalues of the matrix RQ in terms of singular values of residual matrices and principal angles between subspaces, using majorization. We show how our results relate to bounds for eigenvalues after discarding off-diagonal blocks or additive perturbations
Modeling conformational redox-switch modulation of human succinic semialdehyde dehydrogenase
No full textFIGURES 1–10. Perigrapha spp., adults. 1, P. y in A new Perigrapha Lederer, 1857 from South Kazakhstan (Lepidoptera, Noctuidae)
No full textFIGURES 1–10. Perigrapha spp., adults. 1, P. y as a wi i, holotype male, S Kazakhstan; 2, P. y as awii, paratype male, S Kazakhstan; 3, P. yasawii, paratype male, S Kazakhstan; 4, P. circumducta circumducta, male, Russia, Altai Mts; 5, P. c. circumducta female, SE Kazakhstan, Ili river (AVB); 6, P. c. circumducta male, Mongolia, Central aimak; 7, P. c. pallescens, holotype male, China, Xinjiang (photo by G. & L. Ronkay); 8, P. c. pallescens, female, China, Xinjiang (photo by G. & L. Ronkay); 9, P. sechuana, holotype male, China, Sichuan (photo by G. & L. Ronkay); 10, P. sechuana, paratype male, China, Sichuan (photo by G. & L. Ronkay).Published as part of Volynkin, Anton V., Titov, Sergey V. & Knyazev, Svyatoslav A., 2014, A new Perigrapha Lederer, 1857 from South Kazakhstan (Lepidoptera, Noctuidae), pp. 292-296 in Zootaxa 3856 (2) on page 293, DOI: 10.11646/zootaxa.3856.2.8, http://zenodo.org/record/22497
The organizational-and-economic mechanism for reproduction of labor resources capable of mastering robotics in agriculture
No full textRussia's agriculture is experiencing a shortage of workers due to the negative demographic situation, the low attractiveness of the industry and the COVID pandemic, which poses risks to sustainable development. To reduce the personnel shortage, farmers use robotics, but its implementation is slow, due to poor skills of workers to interact with robots. The main goal of the study is to develop a model of the organizational-and-economic mechanism for formation of agricultural labor resources in the context of the use of cyber-physical systems, including robotics. A model of the organizational-and-economic mechanism has been developed, its main elements are: target; organizational-economic; motivational; personnel training and retraining. The goals for achieving the number of employees interacting with cyber-physical systems, in particular with robots, have been adjusted - up to 3% in 2023 and 8% in 2024. The total investments in robotization of the industry will be 3,863 million rubles, including 76.6 million rubles in employee training. The implementation of the elements of the organizational-and-economic mechanism will ensure the conditions for formation of labor resources in accordance with the state program on digitalization of agriculture. © 2023 Author(s).Russian Foundation for Basic Research, РФФИ: 20-010-00457 AThe work was prepared with the support of the Ural State Economic University Ekaterinburg. The research was funded by the RFBR under scientific project No. 20-010-00457 A – Development of Theoretical and Methodological Foundations for the Transformation of Social and Labor Relations in Agriculture under the Digital Econom
Quantum Chemistry and Kinetics Theory - Solving Mysteries of Chemical Mechanisms
No full textA presentation that was delivered in the Fifth University Research Day at the Catholic University of America in 2020
Preconditioned Eigensolvers - An Oxymoron?
No full text. A short survey of some results on preconditioned iterative methods for symmetric eigenvalue problems is presented. The survey is by no means complete and reflects the author's personal interests and biases, with emphasis on author's own contributions. The author surveys most of the important theoretical results and ideas which have appeared in the Soviet literature, adding references to work published in the western literature mainly to preserve the integrity of the topic. The aim of this paper is to introduce a systematic classification of preconditioned eigensolvers, separating the choice of a preconditioner from the choice of an iterative method. A formal definition of a preconditioned eigensolver is given. Recent developments in the area are mainly ignored, in particular, on Davidson 's method. Domain decomposition methods for eigenproblems are included in the framework of preconditioned eigensolvers. Key words. eigenvalue, eigenvector, iterative methods, preconditioner, eigenso..
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