Science & Mathematics

(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.

(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.

(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.

(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.

Ushbu maqolada ingliz va o‘zbek tillaridagi gidronimlarning konseptual voqelanishi kognitiv lingvistika va lingvokulturologik yondashuvlar asosida tahlil qilinadi. Gidronimlarning madaniy, tarixiy va semantik jihatlari o‘rganilib, ularning konseptual strukturasi va milliy tafakkurdagi akslanish xususiyatlari aniqlanadi. Tadqiqot davomida Thames, Severn, Mississippi, Amudaryo, Sirdaryo kabi asosiy gidronimlar orqali chog‘ishtirma tahlil amalga oshiriladi.

This article discusses the process of recruiting and ways to implement their own social capital of representatives of the cultural and educational elite in the political space. In particular, based on the results of a study of the biographies of representatives of the cultural and educational elite present in government bodies on the example of the State Duma of the Russian Federation, the Government of the Russian Federation and the Legislative Assembly of St. Petersburg, the author demonstrated the process of deploying types of careers in the political space. Based on the research conducted by the author, examples of successful “transit” of one’s own cultural capital into the political field and back are presented. It has been shown that the recruitment of the cultural and educational elite implies a complex system of actions, suggesting how representatives of the cultural, scientific, and at the same time educational community are recruited into the political space.

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Pelecinobaccha brevipennis (Schiner, 1868) comb. nov.Map 4. Figure 4.Baccha brevipennis Schiner, 1868.— Schiner, 1868: 341. Type locality: “South America ”. Types male and female NHMW (not examined). Hull, 1949a: 204 (fig. 64, male abdomen), 268 (fig. 343, male wing).Ocyptamus brevipennis. Thompson et al., 1976: 13 (catalog citation).Baccha micropelecina Shannon, 1927.— Shannon, 1927: 10. Type locality: Bolivia, Tumupasa. Holotype female USNM. Hull, 1949a: 250 (fig. 269, female abdomen). n. syn.Ocyptamus micropelecinus. Thompson et al., 1976: 22 (catalog citation).Male. Head: Black. Lunule entirely black and very rugose until middle of frontal triangle. Frontal triangle bare on rugose area, dull black-pollinose dorso-medially, white pollen restricted to small ventro-lateral spots. Vertical triangle with 1 row of short black pile; ocellar triangle ~1.5 times its length from posterior eye margin. Eye contiguity shorter than vertical triangle length. Eye with posterior indentation ventral to the antennal insertion. Antennal insertions confluent, ventral margin has a short dorsal extension. Occiput homogenously covered by white pollen; dorsal ¼ of occiput with 2 rows of simple black pile, anterior row intermittent and with very short pile, middle 2⁄4 with 2–3 rows, anterior rows sometimes with simple black pile, posterior row with long, white, scale-like pile, ventral ¼ with 2–3 rows of white, scale-like pile, anterior row shorter.Thorax: Scutum black with anterior pair of patches of dull brown pollen; pile mostly very short and black, longer and white laterally posterior to transverse suture and with an anterior row of short shining white pile interrupted at middle. Scutellum dark brown with very short black pile, subscutellar fringe absent. Pleuron black with short appressed white pile, pile of metepisternum inconspicuous. Plumula absent. Calypter white, ventral lobe narrow, dorsal lobe bare. Halter white to yellow.Wing: Entirely hyaline, entirely microtrichose; alula linear, slightly narrower than c cell, hyaline, entirely microtrichose.Legs: Proleg pale, light brown on basal ¼ and posterior surface of profemur and small subapical region on protibia, protarsus dark brown. Mesoleg dark brown, apex of mesofemur and basal 2/5 of mesotibia pale, mostly white pilose on apex of mesofemur and basal ¼ of mesotibia, mesofemur posterior row mostly white pilose. Metaleg dark brown, apex of metafemur and basal ¼ of metatibia pale, pile on metacoxa and metatrochanters white.Abdomen: Dark brown; ~5 times as long as thorax, whole abdomen with very short black pile. First tergite pale laterally. Second tergite bare dorsally, very long and narrow, length ~7 times minimum width, and with lateral pair of pale fasciate maculae subapically; dull black pollen forming a subapical fascia connected to an incomplete postero-median narrow vitta. Third tergite very long and narrow, length ~7 times minimum width, and with lateral pair of fasciate pale maculae medially, maculae may extend posteriorly; median vitta of dull black pollen slightly expanding posteriorly; remaining characteristics as on 2nd. Fourth tergite entirely pilose, trapezoidal and long, length ~5 times minimum width, with lateral sub-basal pair of pale triangular maculae. Fifth tergite sub-quadrate, immaculate, entirely pilose. Genitalia: Cercus with 1 row of pile on medial margin and 3 rows on lateral margin. Surstylus very short and oval, directed apically, with many setulae (around 35) ventrally but thicker and concentrated on anterior margin and a few of the basal setulae are distinctly longer, with a few pile on the dorsal surface. Subepandrial sclerite quadrate with slightly concave posterior margin, homogenously sclerotized. Hypandrium short and rectangular, with ventral rectangular notch on anterior ½. Phallapodeme ½ the length of the hypandrium, homogenously sclerotized, with sub-acute base. Distiphallus with anterior surface straight. Postgonite short, ventral surface straight, dorsal surface slightly concave, apex strongly convex, with acute ventral and dorsal extremities.Female: Like male except: Frons of normal width, rugose on ventral ⅓; colour black with dull brown pollinosity medially, a dull black-pollinose spot dorsal to frontal prominence, and lateral white pollinosity continuous from face pollinosity. Ocellar triangle ~2 times its length from posterior eye margin and ~2 ocelli-width from lateral eye margin. Scutum with white pollen laterally and forming a pair of sub-median antero-posterior vittae and a median postero-anterior one; lateral pale pile shorter posterior to transverse suture. Legs mostly pale but dark brown subapically on mesofemur, on apical ½ of metafemur, apical ⅔ of metatibia and all tarsi; posterior row of mesofemur with short pile basally. Whole abdomen with very short black pile. Second tergite very long, length ~5.5 times minimum width, with pair of median lateral fasciate pale spots; medial vitta of dull black pollen not expanded posteriorly. Third tergite long, length ~4 times minimum width, pale on sub-median lateral margin. Fourth tergite long, ~2.5 times as long as wide, usually immaculate, sometimes with pair of median pale vitta on basal ½. Fifth tergite rectangular and long, ~1.5 times as long as wide, 5th segment sclerites fused laterally on apical ½, immaculate. Sixth segment whole, very short, ~⅓ of the length of the 5th tergite. Genitalia: Seventh tergite rectangular narrow, with very short anterior notch medially, basal extensions ½ the length of the 6th segment; 7th segment lateral sclerite rectangular, without acute baso-ventral extremities, joining 7th tergite by narrow sclerotized strip on dorso-posterior corner. Eighth tergite unsclerotized medially but with a subapical narrow well sclerotized strip extending baso-medially as an acute projection, basal crest extended posteriorly. Eighth sternite reduced to a pair of separate triangular sclerites, each with sub-basal unsclerotized areas. Tenth tergite reduced to a transverse sclerotized stripe, extending ventro-basally on each side and fusing to basal surface of cercus. Cercus with apical margin concave and with 2 irregular rows of pile.Length. 9–11mm; wing 5.5–6.5mm.Distribution. Brazil (Pará), Ecuador (Napo), Peru (Cuzco, Madre de Dios, Ucayali), Venezuela (Amazonas).Material examined. BRAZIL. Pará, Serra Norte, Pojuca, 0 1 Jul 1985, M.F. Torres (1 ♂, MPEG-DIP 12170471); ..., Salobo, 26 Jun 1984, T. Pimental (1 ♂, MPEG-DIP 12170496). ECUADOR. Napo, Coca, Napo R., 250m, 25–30 Apr 1965, L. Pena (1 ♂, CNC Diptera 161328). PERU. Cuzco, Pilcopata, 13 Feb 1978, P.M. Marsh (1 ♂, USNM); Madre de Dios, Avispas, 400m., 10–20 Sep 1962, L. Pena (3 ♂, CNC Diptera 161329–31, 2 ♀, CNC Diptera 161332–3); ..., Manu, Rio Manu, Pakitza, Malaise trap, 250m, 12°7'S 70°58'W, 9–23 Sep 1988, W.N. Mathis (1 ♂ & 1 ♀, USNM); [Ucayali], Pucallpa, 18 Nov 1947, J. Shunke (1 ♂, CNC Diptera 161327); ..., Unini, 22 Oct [19]03 (1 ♂, CNC Diptera 161323). VENEZUELA. [Amazonas], T. F. Amaz., Cerro de la Neblina, Basecamp, 140m, 0°50'N 66°9'44''W, 13–20 Feb 1984, D. Davies & T. McCabe (1 ♀, USNM).

(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.

(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.

(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.

L’atoll de la Passion-Clipperton est actuellement exempt d’installation humaine, de façon continue et régulière, mais abrite une importante colonie d’oiseaux, de crabes, de rats et d’espèces végétales. Cependant, qu’il s’agisse de vestiges laissés par des occupations humaines passées ou de déchets plastiques amenés quotidiennement par la mer, elle subit des interactions anthropiques. A la suite d’une mission scientifique internationale, nous nous sommes intéressés à la nature des restes anthropiques, c’est-à-dire à leur histoire, leur dispersion, leur dynamique, jusqu’aux effets sur l’environnement. De façon globale, cette étude permet de s’intéresser à l’histoire, aux usages, aux activités sur et autour de l’atoll, ou encore aux loisirs, aux appropriations humaines et revendications territoriales. Le traitement de ces données a une valeur heuristique considérable pour les sciences humaines et sociales. La problématique des déchets est envisagée non seulement comme un revers de la production, mais aussi comme un objet de recherche associant les dimensions historiques, géographiques, économiques, géopolitiques, paysagères, environnementales, écologiques et symboliques. Ainsi, cette étude est l’occasion de penser et mettre en débat les effets des crises économiques et environnementales actuelles.

Earth’s climate is warming due to anthropogenic emissions of greenhouse gases, especially carbon dioxide (CO 2 ). Different reactions are allocated to mitigate the CO 2 in the atmosphere. However, CO 2 methanation is a pivotal research hotspot due to its ability to produce methane at low operating temperatures (200–400 °C). Halloysite nanotubes (HNTs)-based catalysts have attracted significant attention in various catalytic applications. However, Halloysite is rarely reported for thermal CO 2 methanation. The selected halloysite clay was modified first using the 3-Aminopropyl triethoxy silane (NH 2 ) as coupling agent, the resulting materials (HNTs), and then doped with Ni at different weight concentrations (5%, 10%, 20%, 40%, 50%). materials can offer high surface area and porous structure, which can improve metal dispersion. The prepared Ni/HNTs catalysts were characterized using various techniques, such as XRD, XPS, SEM, and TEM, which confirmed the existence of nanotubes and porous structures. The propensity of the prepared Ni/HNTs were evaluated to catalyse the CO 2 methanation reactions at a temperature range of 250 to 500 ̊C. The catalyst containing 20 wt.% of Ni (20Ni/HNTs) showed the highest CO 2 conversion at all reaction temperatures and the highest selectivity of methane at 450 °C (82%). This study paves the way for the large utilization of the HNTs as a strong support for different metals used in thermal catalytic reactions, not limited to the CO 2 methanation.

Cryptographic software is particularly vulnerable to side-channel attacks when programmed in embedded devices. Indeed, the leakage is particularly intense compared to the noise level, making it mandatory for the developer to implement side-channel attack protections. Random masking is a customary option, but in this case, the countermeasure must be high-order, meaning that each sensitive variable is splitted into multiple (at least two) shares. Attacks therefore become computationally challenging. In this paper, we show that high-order template attacks can be expressed under the form of a convolution. This formulation allows for a considerable speed-up in their computation thanks to fast Fourier transforms. To further speedup the attack, we also provide an interesting multi-threading implementation of this approach. This strategy naturally applies to template attacks where the leakage of each share is multivariate. We show that this strategy can be adapted to several masking schemes, inherently to the way the splitting is realized. This technique allows us to validate multiple very high-order attacks (order of some tens). In particular, it revealed a non-trivial flaw (hard to detect otherwise) in a multivariate extension of the DSM masking (and subsequently to fix it, and validate its rationale).

Jusque dans les années 2010, la violence idéologique et politique était appréhendée, en France, à partir du champ sémantique du terrorisme. Progressivement, ce terme a cédé le pas à celui de « radicalisation », dont la sphère de pertinence est bien plus étendue que celle du premier. Bien que faisant référence à des phénomènes distincts, leur approche interprétative sur la scène politique a peu évolué. À partir d'une analyse systématique des discours politiques de 1980 à 2016, nous mettrons en évidence les facteurs privilégiés par le politique pour rendre compte de la radicalisation. Trois paradigmes dominants se dessinent : le déterminisme social, l'hypersubjectivation, l'occultation des raisons. Que ce soit à travers une approche subjective ou objective, les facteurs convoqués par le politique pour rationnaliser cette violence participent systématiquement de sa dépolitisation.