13,549 research outputs found
Hispanocader Golub, Popov et Arillo 2012, n. gen.
No full textHispanocader Golub, Popov et Arillo, n. gen. Type species: Hispanocader lisae Golub, Popov et Arillo, n. sp. Included species: monotypic. Diagnosis. Relation of antennal segment lengths: I III> IV. Head strongly elongate, with one pair of frontal short spines. Bucculae short and low, settled in anterior quarter of the lower head surface only. Hemelytral venation comparatively rich. Areolae of hemelytra are small.Published as part of Golub, V. B., Popov, Yu. A. & Arillo, A., 2012, Hispanocaderidae n. fam. (Hemiptera: Heteroptera: Tingoidea), one of the oldest lace bugs from the Lower Cretaceous Álava amber (Spain), pp. 41-50 in Zootaxa 3270 (1) on page 43, DOI: 10.11646/zootaxa.3270.1.3, http://zenodo.org/record/524931
Leptosaldinea cobbeni Popov & Heiss, 2016, sp.nov.
No full textLeptosaldinea cobbeni sp.nov. (Figs. 1–12) Type material. Holotype: macropterous female preserved in a piece of Burmese amber which is embedded in a block of transparent artificial resin for better conservation, provided with following red label: “ Holotype / Leptosaldinea gen.nov. / cobbeni sp. nov. / des. Heiss & Popov, 2015 ”. The holotype is deposited in the collection of the second author (EH) at the Tiroler Landesmuseum, Innsbruck, Austria. Body convex; left eye and pronotal margin damaged, surface of median part of pronotum, scutellum and clavus missing and probably eaten by scavengers, their remains depressed and not clearly discernible; legs and antennae complete with long spines and setae. Description. As given in the generic diagnosis and description. Measurements (mm). Length 2.75; width of hemelytra 1.35; length of antennae 1.95, ratio length of antennae / width of head = 2.78; length of antennal segments I:II:III:IV = 0.15: 0.25: 0.75: 0.80; length of rostral segments I:II:III:IV =?: 0.15: 0.20: 0.20; length of pronotum at middle 0.4, anterior width 0.5, posterior width 0.85; scutellum length 0.37; legs: femur:tibia:tarsus including claws: fore leg 0.875: 0.8: 0.4; middle leg 0.875: 0.875: 0.375; hind leg 1.0: 1.40: 0.5. Drawings might show slight differences to given measurements because of partly obscured visibility of structures. Etymology. Named after the eminent Dutch hemipterologist René Cobben, who proposed the subfamily Leptosaldinae for the first discovered leptosaldine species, Leptosalda chiapensis.Published as part of Popov, Yuri A. & Heiss, Ernst, 2016, A remarkable fossil leptosaldine bug from Mid-Cretaceous Burmese amber (Hemiptera: Heteroptera: Leptopodomorpha: Leptopodidae), pp. 233-238 in Zootaxa 4137 (2) on page 237, DOI: 10.11646/zootaxa.4137.2.5, http://zenodo.org/record/25743
Metoisops kerzhneri Popov & Herczek 1992
No full text<i>Metoisops kerzhneri</i> Popov & Herczek, 1992 <p>(Figs. 1–3)</p> <p> <b>Diagnosis.</b> This species is recognized by the strongly transversal head, narrow vertex that is half the width of eye, short claval commissure (slightly longer than mesoscutum and scutellum taken together), and the posterior margin of the pronotum being at least twice as long as the anterior margin.</p> <p> <b>Redescription.</b> Holotype. About 3 mm; body elongate, 3.1x as long as wide. General coloration uniform dark brown, antennae, rostrum and legs pale brown; scutellum pale yellow, cuneal apex dark. Dorsal surface of body smooth, with some weak punctuation; pronotum, hemelytra and scutellum with short, dense, pressed hairs, head, pronotal confluent calli, scutellum and cuneus with scattered hairs. Head, scutellum, cuneus inpunctate (Figs. 1,2). Head strongly transverse, 2.61x as wide as long, wider than anterior margin of pronotum; eyes globular, some flattened from above. Vertex 2x narrower than dorsal width of eye; combined antennal length of 3rd and 4th segments equal length of 2nd (Figs. 3); 4th rostral segment longest of others. Pronotum trapezoidal, moderately transversal, 2.1x as wide as long; ratio length of posterior and anterior margins 1.98; calli weakly developed, intercallian pit weakly expressed; posterior margin weakly convex. Visible portion of mesoscutum narrow exposed, 4.5x shorter than length of scutellum. Claval commissure relatively short, almost equal in length to mesoscutum and scutellum combined (Table 1). Cuneus 5x shorter than corium length and 2.35as long as wide; large cell of hemelytral membrane 4x as long as wide. Hind femora not flattened and thickened, more than 7.5x longest than width and 1.12x longer than tibia; tibia 3.75x longer than tarsus; 1st tarsal segment of hind leg 1.53x shorter than 2nd one.</p> <p> <b>Dimensions</b>. Length of body 3.3, width 1.1; length of head 0.18, width 0.47, dorsal width of eye 0.21, width of vertex 0.10; antennal segments I:II:III:IV= 0.26:0.83:0.4:0.44; rostral segments I:II:III:IV= 0.26:0.39:0.?:0.63; length of pronotum 0.45, width 0.47 (ant.) and 93 (post.); length of mesoscutum 0.08; length of scutellum 0.36; claval commissure 0.47; length of corium 1.56, length of cuneus 0.31; length of hind femur 1.2, width 0.16; length of tibia 1.35; length of tarsus 0.36 (I+II = 0.15+0.23).</p> <p> <b>Specimens examined.</b> Holotype, ♂, Nr. 14646; light reddish and small-sized piece of almost rectangular shape amber (15 x 9 mm). Western Hills, near Gdańsk (leg. T.Giecewicz, 1977). The holotype is deposited in the Museum of the Earth PAN.</p> <p> <b>Remarks.</b> This species has the strongly transversal head (2.6 x as wide as long), narrow vertex that is half the width of eye, and short claval commissure (slightly longer than mesoscutum and scutellum taken together), which distinctly separates them from other species. However <i>M. kerzhneri</i> has the same configuration of the pronotum (ratio length posterior/anterior margin = ca.2.0) as <i>M. punctatus</i>.</p>Published as part of <i>Herczek, Aleksander & Popov, Yuri A., 2014, Revision of the genus Metoisops (Hemiptera: Heteroptera, Miridae, Isometopinae) from late Eocene European amber, pp. 401-421 in Zootaxa 3887 (3)</i> on page 405, DOI: 10.11646/zootaxa.3887.4.1, <a href="http://zenodo.org/record/251002">http://zenodo.org/record/251002</a>
European policies for social inclusion of Roma : Catch 22?
No full textThe article analyzes contemporary political discourses with regard to social inclusion of Roma on the basis of comparison with achievements and failures in the previous historical period of the communist rule in Eastern Europe. It argues that since the vast majority of the European Roma had lived in the past and continue living nowadays in the countries of Eastern Europe, no successful policy for their inclusion is possible without taking into account the experiences and outcomes of the actions for Roma integration in the socialist period. The experience from the times of socialism shows that successful policies are possible only in an appropriate socio-political context and only if accomplished within the mainstream approach. Against this background, the article scrutinizes the European Policies for Social Inclusion of Roma, and explains why they present a Catch 22 situation: There is a vicious cycle of problems which need to be solved; the solution requires a special policy for inclusion, however this policy stigmatizes Roma and sets them even more apart from the rest of society. Thus the vicious cycle of problems expands. The main point of the article is to propose an explanation of this failure of democracy and liberalism, which could constitute a useful lesson for the future.Peer reviewe
Metoisops grabenhorsti Herczek & Popov, sp. nov.
No full text<i>Metoisops grabenhorsti</i> Herczek & Popov, sp. nov. <p>(Figs. 18–19)</p> <p> <b>Diagnosis.</b> This species is clearly different from other species in this genus by very broad vertex and also broad visible portion of the mesoscutum.</p> <p> <b>Description.</b> Body 2.66 mm, elongate, 2.4x as long as wide. General coloration uniformly dark-brown, especially pronotum and mesoscutum; scutellum pale yellow. Hemelytra covered with dense, relatively short, adpressed golden hairs arising from articulate punctures; outer margin of hemelytra distinctly polished and inpunctate; scutellum shiny with same pale hairs at the base (Figs. 18, 19). Head moderately transverse, 2.61x as wide as long, distinctly wider than anterior margin of pronotum. Vertex quite wide, dorsal width of eye only 1.43x wider than width v e r t e x; eyes globular. 2nd antennal segment 3 times longer than 1st. Pronotum trapezoidal, moderately transversal, 1.72x as wide as long; calli weakly developed, intercallian pit weakly expressed; ratio length posterior/anterior margin 2.4x wider than median length; posterior margin weakly convex. Visible portion of mesoscutum v e r y narrow exposed, length scutellum 4.35x longer. Claval commissura long, ratio length claval commissure/mesoscutum+scutellum 1.2. Corium length 4.7x longer than cuneus; cuneus twice as long as wide; large cell of hemelytral membrane long, 3.2x as long as wide. Tibia 2.8x longer than tarsus; 1st tarsal segment of hind leg 1.77x shorter than 2nd one.</p> <p> <b>Dimensions</b>. Male. Length of body from apex of hemelytra 2.66, width 1.1; length of head 0.18, width 0.47, dorsal width of eye 0.26, width of vertex 0.18; antennal segments I:II = 0.23:0.72, III, IV–invisibly; rostral segments I 0.28, II, III, IV–invisibly; length of pronotum 0.36 (max.), width 0.26 (ant.) and 0.62 (post.); length of mesoscutum 0.1; length of scutellum 0.26; claval commissure 0.49; length of hind femur 0.83; length of tibia 0.95; length of tarsus 0.34 (I+II = 0.13+0.23).</p> <p> <b>Etymology.</b> This species is named after Mr. Heirich Grabenhorst (Hamburg, Germany), who acquired this amber piece for his collection, provided the specimen for scientific study and generously donated the type material to the GPIMH.</p> <p> <b>Specimens examined.</b> Holotype, ♂, in Baltic amber (coll. H. Grabenhorst, Het-7) light reddish and smallsized piece of amber (10 x 7 mm) of irregular shape, which embedded into artificial resin (35 x 15 mm). The holotype is deposited in the collection of GPIMH.</p> <p> <b>Remarks.</b> <i>M. grabenhorsti</i> shares features in common with other species in the genus such as the ratio width/ length pronotum (1.72–1.82) that is similar to <i>M. punctatus, M. intergerivus, M. variabilis</i> and <i>M. punctatodiffusus</i>, and also ratio length posterior/anterior margin of pronotum (2.3–2.4x wider than long). However this species is clearly different from all species by very broad vertex (only 1.43x narrower than eye) and also very broad visible portion of mesoscutum (approximately 2.6x shorter than scutellum length) and ratio length claval commissure/ mesoscutum+scutellum (1.2).</p>Published as part of <i>Herczek, Aleksander & Popov, Yuri A., 2014, Revision of the genus Metoisops (Hemiptera: Heteroptera, Miridae, Isometopinae) from late Eocene European amber, pp. 401-421 in Zootaxa 3887 (3)</i> on pages 415-417, DOI: 10.11646/zootaxa.3887.4.1, <a href="http://zenodo.org/record/251002">http://zenodo.org/record/251002</a>
Andrena tadzhica Popov 1949
No full text18. Andrena tadzhica Popov, 1949 (Figs 18a–e) Andrena tadzhica Popov, 1949: 392, ♀, ♁. Type locality: Dushanbe (Tajikistan). Published (original) locality: Tajikistan: Stalinabad. Lectotype (designated here): ♀,Сталинабад (ДЮшамбе), р.[ека] Харангон[Tajikistan, Dushanbe, Kharangon River, 38°34′N 68°47′E], 3. VI.[1]934, Гуссаковский [V. Gussakovskij leg. // tadzhica // Andr. tadzhica sp. n., ♀, Typ!, V. Popov det. 1936 // Lectotypus Andrena tadzhica Popov, design. Osytshnjuk // Lectotypus, Andrena tadzhica Popov, 1949, design. Astafurova et al., 2023 // Zoological Institute St. Petersburg INS_HYM_0000289. Paralectotypes: 1 ♁, Ворухъ [Tajikistan, Vorukh] // к. Ф. Моравица [Collectionof F. Morawitz] // Andr. tadzhica sp. n., ♁, V. Popov det. 1936 // Paralectotypus Andrena tadzhica Popov, design. Osytshnjuk ; 1 ♁, Yagnob, Rabat, VII.12 // Andr. tadzhica sp. n., ♁, V. Popov det. 1936 // Paralectotypus Andrena tadzhica Popov, design. Osytshnjuk ; 1 ♁, Ривак-Хорог, Шугнан, Памиры [Ravak-Khorog, Shugnan, Pamir], 29. V.[19]01, Б. Федченко [B. Fedchenko leg.] // Andr. tadzhica, ♁,?, V. Popov det. 1936; 1 ♁, Bukhara, Darvaz, Kala-i-Khum, 8.VII.[1]913, Golbeck coll. // A. tadzhica // Andr. tadzhica sp. n., ♁, Typ!, V. Popov det. 1936 // Paralectotypus Andrena tadzhica Popov, design. Osytshnjuk // Paralectotypus, Andrena tadzhica Popov, 1949, design. Astafurova et al., 2023 . Current status. Andrena (Plastandrena) tadzhica Popov, 1949 (according to Gusenleitner & Schwarz 2002: 742). Distribution. Tajikistan.Published as part of Astafurova, Yulia V., Proshchalykin, Maxim Yu. & Sidorov, Dmitry A., 2023, The type specimens of bees (Hymenoptera: Apoidea) deposited in the Zoological Institute of the Russian Academy of Sciences, St. Petersburg. Contribution VI. Family Andrenidae, genus Andrena Fabricius, 1775, taxa described by V. Popov, pp. 401-426 in Zootaxa 5301 (4) on pages 422-423, DOI: 10.11646/zootaxa.5301.4.1, http://zenodo.org/record/803595
Perturbative Yang–Mills theory without Faddeev–Popov ghost fields
No full textA modified Faddeev–Popov path integral density for the quantization of Yang–Mills theory in the Feynman gauge is discussed, where contributions of the Faddeev–Popov ghost fields are replaced by multi-point gauge field interactions. An explicit calculation to O(g2) shows the equivalence of the usual Faddeev–Popov scheme and its modified version.© 2018 The Author
Riegerochterus baehri Popov & Heiss 2014
No full textƬ Riegerochterus baehri Popov & Heiss, 2014 Riegerochterus baehri Popov & Heiss, 2014a: 187 –188 (description, differential diagnosis, illustrations). HOLOTYPE:, ‘in a piece of irregular shaped Dominican Amber (17 × 17 × 13 mm), Type. Kat. Nr. Do-4667-B’ (SMNS). Riegerochterus baehri: SCHUH & WEIRAUCH (2020): 152 –153 (list). Distribution. Dominican amber (?Early to Middle Miocene) (POPOV & HEISS 2014a).Published as part of Kment, Petr, Carapezza, Attilio & Jindra, Zdeněk, 2020, Taxonomic catalogue of the family Ochteridae with description of Ochterus papaceki sp. nov. from Socotra Island and Tanzania (Hemiptera: Heteroptera), pp. 23-64 in Acta Entomologica Musei Nationalis Pragae 60 (1) on page 50, DOI: 10.37520/aemnp.2020.003, http://zenodo.org/record/387965
Grimaldinia pronotalis Popov & Heiss, 2014, sp. n.
No full textGrimaldinia pronotalis sp. n. (Figs. 1–2, photo 1–2) Holotype. Submacropterous specimen, sex not determined, in a half-moon shaped piece of Burmese Amber (20 x 4 x 7mm) embedded in a block of transparent resin; left forewing damaged by an oval cut out probably caused by scavengers; specimen is ventrally attached to a strip of lizard skin, thus ventral side of specimen is not visible, lateral view partly obscured by amber impurities; membraneous hind wing of the left forewing is laterally roundly exposed and overlapping the right fore wing, its surface showing dense microsculpture and longitudinal venation. Deposited as BUB-LEP- 1 in the collection of the second author. Description. As given in the generic diagnosis and description. Coloration of dorsal and ventral side (as far as visible) uniformly black. Measurements. Length 3.0mm; head width / length 45 / 24, anterior width between eyes 6; pronotum length at middle / width 11 / 27, length laterally 14; scutellum length / width 33 / 33; length of eye 10, diameter 4. Etymology. Refers to the conspicuous configuration of the pronotum.Published as part of Popov, Yuri A. & Heiss, Ernst, 2014, Grimaldinia pronotalis n. gen., n. sp. from Mid-Cretaceous Burmese Amber (Hemiptera: Heteroptera, Leptopodidae, Leptosaldinae), pp. 444-450 in Zootaxa 3878 (5) on page 449, DOI: 10.11646/zootaxa.3878.5.2, http://zenodo.org/record/22909
Time Delay Compensation and Stability Analysis of Networked Predictive Control Systems Based on Hammerstein Model
No full textA novel approach is proposed for a networked control system with random delays containing a nonlinear process based on a Hammerstein model. The method uses a time delay two step generalized predictive control (TDTSGPC), which consists of two parts, one is to deal with the input nonlinearity of the Hammerstein model and the other is to compensate the network induced delays in the networked control system. Theoretical results using the Popov theorem are presented for the closed-loop stability of the system in the case of a constant delay. Simulation examples illustrating the validity of the approach are presented
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