1,460 research outputs found
A nonlinear theory for shells with slowly varying thickness
No full text1 online resource (PDF, 6 pages)Lewicka, Marta; Mora, Maria Giovanna; Pakzad, Mohammad Reza. (2008). A nonlinear theory for shells with slowly varying thickness. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/179960
Petrimordella lapidicola Batelka & Rosová & Prokop 2023, comb. nov.
No full text<i>Petrimordella lapidicola</i> (Wickham, 1909) comb. nov. <p> <i>Mordella lapidicola</i> Wickham, 1909: 130. Holotype: Middle Eocene, Florissant Formation, Colorado, USA.</p> <p> <b>Comments on the original description.</b> Uninformative description was provided. It is proposed by the author that this species ‘can be distinguished from any others which may be discovered in these shales by the comparative measurements.’</p>Published as part of <i>Batelka, Jan, Rosová, Kateřina & Prokop, Jakub, 2023, Diversity and morphology of Eocene and Oligocene Mordellidae (Coleoptera), pp. 451-478 in Acta Entomologica Musei Nationalis Pragae 63 (2)</i> on page 473, DOI: 10.37520/aemnp.2023.027, <a href="http://zenodo.org/record/10621277">http://zenodo.org/record/10621277</a>
Baltistena amplicollis Batelka & Rosová & Prokop 2023, comb. nov.
No full text<i>Baltistena amplicollis</i> (Ermisch, 1941) comb. nov. <p>(Figs 2D–G)</p> <p> <i>Mordellistena amplicollis</i> Ermisch, 1941a: 182. Holotype: Baltic amber.</p> <p> <b>Type material examined.</b> HOLOTYPE (SDEI): ‘ MORDELLISTENA [p] / amplicollis [hw] / det. Ermisch 194 [p] i [hw, sic; white label glued on a bigger white label] // TYPE [p; in black frame, red label glued on the bigger white label] // SDEI Müncheberg / SDEI-Amb-000640 [p; yellowish label]’.</p> <p> <b>Comments on identification.</b> As pro- and mesotarsomere IV are distinctly broader and shallowly emarginated, this species cannot be attributed to <i>Mordellistena</i>. To distinguish it from other Eocene Mordellistenini see the Key below. Because of the uncertain generic identity of this species, it is transferred here into <i>Baltistena</i> new collective group.</p>Published as part of <i>Batelka, Jan, Rosová, Kateřina & Prokop, Jakub, 2023, Diversity and morphology of Eocene and Oligocene Mordellidae (Coleoptera), pp. 451-478 in Acta Entomologica Musei Nationalis Pragae 63 (2)</i> on page 458, DOI: 10.37520/aemnp.2023.027, <a href="http://zenodo.org/record/10621277">http://zenodo.org/record/10621277</a>
Rovnostena ponomarenkoi Batelka & Rosová & Prokop 2023, comb. nov.
No full text<i>Rovnostena ponomarenkoi</i> (Odnosum & Perkovsky, 2009) comb. nov. <p> <i>Glipostena ponomarenkoi</i> Odnosum & Perkovsky,2009: 1095. Holotype: ♀, Rovno amber.</p> <p> <b>Comments on identification.</b> According to ERMISCH (1941b), the genus <i>Glipostena</i> belongs to the group of genera that are defined by ‘Der Halsschild weniger breit als lang’ [= the pronotum slightly wider than long], while in <i>G</i>. <i>ponomarenkoi</i> <i>,</i> according to its description, the pronotum is 1.7–1.8× wider than long, that is, much wider than cited by ERMISCH (1941b). In the comparison by ODNOSUM & PERKOVSKY (2009), this species shares with <i>G</i>. <i>sergeli</i> from Baltic amber ‘short lateral ridges taken not more than one third of the hind tibia width and parallel to its apical margin’, which according to the authors ‘sharply differentiate’ <i>G</i>. <i>ponomarenkoi</i> from recent species that have long ridges that reach the middle of the hind tibia and are not parallel with the apical margin (see, e.g., ERMISCH 1941b: fig. 13; ERMISCH 1952: fig. 21; FRANCISCOLO 2000:figs 1, 2). The comb formula for species of <i>Glipostena</i> is usually 4//2/1/1/0 or rarely 3–5//3/1/1/0 (FRANCISCOLO 1999), while in <i>G</i>. <i>ponomarenkoi</i> it is 6//5/4/3/0. The shape of maxillary palpomeres, an important generic character of <i>Glipostena</i>, is not described for this fossil.</p> <p> In summary, <i>G</i>. <i>ponomarenkoi</i> differs from all extant <i>Glipostena</i> in terms of three important generic characters.Therefore, its assignment to this extant genus is not accepted and this species is transferred to <i>Rovnostena</i> new collective group.</p>Published as part of <i>Batelka, Jan, Rosová, Kateřina & Prokop, Jakub, 2023, Diversity and morphology of Eocene and Oligocene Mordellidae (Coleoptera), pp. 451-478 in Acta Entomologica Musei Nationalis Pragae 63 (2)</i> on page 472, DOI: 10.37520/aemnp.2023.027, <a href="http://zenodo.org/record/10621277">http://zenodo.org/record/10621277</a>
Prokop in the Bath: Some Observations on the Liber diurnus de gestis Bohemorum in Concilio Basileensi
No full textOn Wednesday, 21 January 1433 Prokop Holý took a bath. There was nothing unusual about this. Medieval men did occasionally bathe and Prokop had been in the field for some years directing the Hussite armies. Still, the author of a medieval chronicle went to the bother of recording this otherwise mundane exercise of personal hygiene. The bath is certainly unremarkable but the occasion for the bath compels our attention. Prokop had recently undertaken a long journey from Prague to Basel, a distance of some 571 kilometres (355 miles). But he had arrived in Basel on Sunday 4 January - two-and-a-half weeks or a full eighteen days earlier - and certainly had time to bathe before the 21st. One might argue that only now did Prokop have the opportunity to enjoy a bath. Indeed, Prokop and his contingent of delegates to the Council of Basel faced a rather gruelling schedule but a glance at the "day book of the deeds of the Czechs at the Council of Basel" reveal no formal activities on either Tuesday the 6th or Sunday the 11th of the month. Moreover, the 'Liber diurnus' (diary) reveals that on Monday the 5th, Prokop had the day free until about four in the afternoon. On the 7th there were no scheduled conferences with the conciliar fathers. On Friday the 16th, business sessions appear to have recessed by lunch time for the remainder of the day. Even on days when the delegates were in session with the council they were not in continuous meetings from sunrise to sundown. In other words, Prokop surely had plenty of opportunity to bath before Wednesday, 21 January. It seems unavoidable that Prokop's bath was an excuse, albeit a feeble one, for not attending the council session on that day. This raises the question of why Prokop might wish to absent himself on that occasion
The matching property of infinitesimal isometries on elliptic surfaces and elasticity of thin shells
No full textUsing the notion of Gamma-convergence, we discuss the limiting behavior of the three-dimensional nonlinear elastic energy for thin elliptic shells, as their thickness h converges to zero, under the assumption that the elastic energy of deformations scales like h^\beta with 2<\beta<4. We establish that, for the given scaling regime, the limiting theory reduces to linear pure bending. Two major ingredients of the proofs are the density of smooth infinitesimal isometries in the space of W^{2,2} first order
infinitesimal isometries, and a result on matching smooth infinitesimal isometries with exact isometric immersions on smooth elliptic surfaces
Gaining Independence of Clients of Facilities of Alternative Education Care in International Comparison
No full textGaining independence of clients in the system of the alternative education care is the cardinal topic of the work. Within the framework of the international comparison, the author analyses and makes a survey of the problems accompanying this process. The work does not contain only the conclusions the author came to based on the research in chosen countries (Czech Republic and Poland) but also presents suitable recommendations how the problem of gaining independence of clients of the alternative education care can be solved. The introductory part is applied to theoretical solutions, the international comparisons and examples of a good practice abroad. The author follows opinions of different experts in causalities of the problem from the influence of the biological family through socialization of the clients of the education care to the very problems of the institutional care. He presents these opinions subsequently in the context. In the methodological and research parts the author tries to answer the cardinal question: "What is way the clients of the alternative education care are prepared in order to gain independence?" Within the framework of the qualitative design of the research, the author is mediating the readers the real situation which the clients gaining independence and their carers are..
Erwartungen der Wirtschaft an die wissenschaftliche Weiterbildung der Hochschulen: Umsetzungsprobleme und Praxiserfahrungen
No full textGraeßner G. Erwartungen der Wirtschaft an die wissenschaftliche Weiterbildung der Hochschulen: Umsetzungsprobleme und Praxiserfahrungen. In: Prokop E, ed. Problemkreis Wissenschaft, Hochschule und wissenschaftliche Weiterbildung. Beiträge / AUE, Hochschule und Weiterbildung ; 30. Vol 30. Bielefeld: AUE e.V., Hochschule und Weiterbildung; 1994: 7-14
Shell theories arising as low energy Gamma-limit of 3d nonlinear elasticity
No full textWe discuss the limiting behavior (using the notion of Gamma-limit) of the 3d nonlinear elasticity for thin shells around an arbitrary smooth 2d surface. In particular, under the assumption that the elastic energy of deformations scales like h^4, h being the thickness of a shell, we derive a limiting theory which is a generalization of the von Kármán theory for plates
Baltistena sergeli Batelka & Rosová & Prokop 2023, comb. nov.
No full text<i>Baltistena sergeli</i> (Ermisch, 1943) comb. nov. <p>(Figs 5F–J)</p> <p> <i>Glipostena sergeli</i> Ermisch, 1943: 65. Holotype: J, Baltic amber.</p> <p> <b>Type material examined.</b> HOLOTYPE: (SDEI):, [two white labels with double black frames glued on left and right side of microscope slide, the other labels glued on top of them] ‘ Glipostena [hw] / Sergeli sp. n. [hw] / det. Ermisch 1942 [p; white label] // Ermisch (Type) [hw; double framed white label on the left side of microscope slide] // TYPE [p; in black frame, red label] // SDEI Müncheberg / SDEI-Amb-000647 [p; yellowish label] / coll. Dr.Sergel / ded. Novemb. 1942 [hw; double framed, white label on the right side of the microscope slide]’.</p> <p> <b>Comments on identification.</b> Terminal palomere of maxillary palpus is malleiform (bean-like in shape), i.e., of type C sensu FRANCISCOLO (1957a), versus equilateral triangular in extant species of <i>Glipostena</i> Ermisch, 1941, i.e., of type B (FRANCISCOLO (1957a). Comb formula 7//5/3/2/0 and length and orientation of all combs are very different from those in extant species: combs of <i>G. sergeli</i> are too short, more transverse and more abundant on metatibia and the first three metatarsomeres (for details see under <i>Rovnostena ponomarenkoi</i> (Odnosum & Perkovsky, 2009)). To distinguish it from other Eocene Mordellistenini see the key below.</p> <p> Because of the uncertain generic identity of this species, it is transferred here into <i>Baltistena</i> new collective group.</p>Published as part of <i>Batelka, Jan, Rosová, Kateřina & Prokop, Jakub, 2023, Diversity and morphology of Eocene and Oligocene Mordellidae (Coleoptera), pp. 451-478 in Acta Entomologica Musei Nationalis Pragae 63 (2)</i> on page 459, DOI: 10.37520/aemnp.2023.027, <a href="http://zenodo.org/record/10621277">http://zenodo.org/record/10621277</a>
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