4,196 research outputs found
Copa sakalava Pett & Rabemananjara 2022, sp. nov.
No full text<i>Copa sakalava</i> Pett, sp. nov. <p>http://zoobank.org/81d387d6-dc60-481a-a22a-0c47100f7985</p> <p>Figs 2–10</p> <p> <b>Material Examined.</b> Holotype ♂. MADAGASCAR: -15.504529, 46.708601, Mariarano, 19 June 2018, forest, 21:07h, Brogan L. Pett leg (RMCA _ARA_ 247355).</p> <p>Paratypes: 2 ♀, MADAGASCAR: -15.478513, 46.683486, Mariarano, 17 June 2018, forest patch near riverbank, 20:00h, Brogan L. Pett leg (RMCA _ARA_247356).</p> <p> <b>Etymology.</b> The species epithet honours the Sakalava ethnic group of Madagascar from the region of the type locality. It is a noun in apposition.</p> <p> <b>Diagnosis.</b> <i>Copa sakalava</i> <b>sp. nov.</b> is readily distinguished from all other <i>Copa</i> by: broad embolus with 1.5 turns, with the final half turn directed prolaterally, extending around 1/3 rd to ½ of the length back across the basal embolus coil (rather than long, thin, and extending to apex of cymbium in <i>C. flavoplumosa,</i> or relatively straight and medium width, extending to cymbial apex in <i>C. kei</i> Haddad, 2013). Additionally, <i>Copa sakalava</i> <b>sp. nov.</b> has a sharp but stubby paracymbial spine retrolaterally. Females are distinguished primarily by the lateral chamber of the CD that joins the median path of CD mid-way between the CO and connection between ST and CD, in ventral view the large semi-circular epigynal hood is also unique in the genus.</p> <p> <b>Taxonomic notes.</b> <i>Copa sakalava</i> <b>sp. nov.</b> is the only species in the genus currently known to have a mostly uniform orangish brown habitus and, at present, it may be utilised as a diagnostic character. However, with a revision with more than 40 new species from Madagascar pending, we consider the apparent uniqueness of this character may quickly lose value.</p> <p> <b>Description</b></p> <p> <b>Male</b> (holotype: RMCA _ARA_ 247355)</p> <p>Measurements. TL 5.30, CL 2.68, CW 2.07, CH 1.12, SL 1.34, SW 1.12, AL 2.62, AW 1.72, chelicera length 0.77, chelicera width 0.43. Legs. I: 1.76, 0.71, 1.42, 1.36, 1.16. II: 1.69, 0.48, 1.20, 1.38, 1.10. III: 1.80, 0.79, 1.24, 1.67, 0.98. IV: 2.50, 1.02, 1.90, 2.58, 1.17. Eyes: AME—0.10, ALE—0.08, PME—0.09, PLE—0.08.</p> <p> <i>Colouration:</i> Carapace orange to brownish-orange (Figs. 2, 4), slightly darker at margins and lighter around fovea. Ocular region black. Broad, indistinct line of feathery black setae from PER to posterior slope of carapace. Black erect setae in line extending straight from just posterior of PME to just anterior to fovea. Sternum bright yellowish-orange (Fig. 3), coxae all paler. Dorsal sclerite deep reddish-orange, otherwise abdomen dorsally beige to greyish, venter beige to cream, epigastric region orangish. Legs I & II generally yellowish-brown, legs III & IV generally brownish-orange and clearly darker than first two pairs. Mt III & IV deep orangish-red.</p> <p> <i>Carapace:</i> Broad, width about 4/5 th length. Highest point at fovea, sloping abruptly posterior to fovea.</p> <p> <i>Sternum:</i> Broad, shield-shaped, anterior ridge straight. Widest between coxae II and III.</p> <p> <i>Eyes:</i> AER procurved with AMEs largest, close to touching ALE. PER strongly procurved, with PME slightly larger larger than PLE. Strong, short, ocular setae in horizontal rows of six between PLE and PME.</p> <p> <i>Legs:</i> Dorsal, prolateral and retrolateral spines absent from tibiae I, II. All femora with sparse erect ventral setae, patellae with and fine, long setae dorsally. Femur IV distinctly broader than others. Ti, Mt and Ta with dorsal, prolateral and retrolateral trichobothria.</p> <p> <i>Chelicerae:</i> Covered with relatively long, erect setae on anterior face. Two teeth on retromargin, well-spaced, about equal-sized, distal tooth slightly larger.</p> <p> <i>Abdomen:</i> Six strong straight setae on anterior margin of dorsal sclerite. Dorsal sclerite around half length of abdomen and posterior margin bifid. Dorsum covered by short straight black setae and feathery black setae, denser at lateral margins. Venter with sparser black setae. Inframamillary sclerite small, circular, with dense short setae. Epigastric region with moderate sclerotisation and straight black setae medially, absent laterally.</p> <p> <i>Palp:</i> (Figs. 8, 9) Cymbium orange to brown. One large prolateral spine on tibia, one on prolateral edge of cymbium. Retrolateral paracymbial spine sharp but stubby. Tegulum pear-shaped with sperm duct deep purple to black. Embolus with relatively broad basal ridge around 2/3 width of cymbium, distally to ridge-embolic turn broader, around ¾ width of cymbium, turning 1½ times with embolus tip directed prolaterally and extending between 1/3 and ½ length of distal coil. Several thicker short setae at apex of cymbium.</p> <p> <i>Leg spination</i>: I: F = pl1 do3 rl1, P = d1, Ti = plv2 rlv2 (one additional much smaller spine plv), Mt = plv2 rlv2. II: F = pl1 do3 rl1, P = d1, Ti = plv2 rlv2 (one additional much smaller spine plv), Mt = plv2 rlv2. III: F = pl2 do3 rl2, P = do1, Ti = pl2 d1 rl3 plv3 rlv3, Mt = pl1 do4 rl1 plv2 rlv2. IV: F = pl2 d3 rl2, P = d1, Ti = pl2 d1 rl3 plv2 rlv2, Mt = pl2 d4 rl2 plv2 rlv2.</p> <p> <b>Female</b> (paratype)</p> <p>Measurements. TL 6.36, CL 2.82, CW 2.12, CH 1.12, SL 1.42, SW 1.24, AL 3.54, AW 2.68, chelicera length 1.00, chelicera width 0.52. Legs. I: 1.82, 0.78, 1.48, 1.28, 1.00. II: 1.78, 0.70, 1.36, 1.30, 0.86. III: 1.73, 0.70, 1.22, 1.60, 0.88. IV: 2.04, 0.80, 1.44, 2.38, 1.10. Eyes: AME—0.10, ALE—0.08, PME—0.10, PLE 0.08. AME—ALE 0.02, PLE—PME—0.05, AME-PME—0.14, ALE-PLE—0.04.</p> <p> Shape, colouration, details of eyes, legs and chelicerae all as in male, except: dorsal sclerite very small, covering only around 1/8 th of dorsum, light brownish orange.</p> <p> <i>Epigyne:</i> (Figs. 10, 11). Roughly square due to lateral chamber of CD, large semi-circular external ridges with lightly translucent hood around midpoint of epigyne, hood margin anteriorly at lateral margin of ST and touching at their mid-point for 1/3 their length posteriorly; CO just posterior to anterior apex of hood, CD highly distinctive, directed dorsally and slightly obliquely toward both ventral portion of CD and lateral chamber of CD (in anterior view) situated between CO and distinctive looped connection of CD to posterior end of ST II.</p> <p> <i>Leg spination:</i> I: Ti = plv2 rlv2 (one additional much smaller spine at plv apex), Mt = plv2 rlv2. II: F = pl1 do3 rl1, P = d1, Ti = plv1 rlv2 (one additional much smaller spine at plv apex), Mt = plv2 rlv2. III: F = pl2 do3 rl2, P = d1, Ti = pl2 d1 rl2 plv3 rlv2, Mt = pl3 d4 rl1 plv2 rlv2 (4 distal spines around apex of segment). IV: F = pl2 do3 rl2, P = d1, Ti = pl2 d1 rl3 plv3 rlv2, Mt = pl2 d4 rl2 plv2 rlv2.</p>Published as part of <i>Pett, Brogan L. & Rabemananjara, Paul Bienvenu, 2022, A new species of Copa (Araneae: Corinnidae: Castianeirinae) from dry forests in the north west of Madagascar, pp. 281-287 in Zootaxa 5115 (2)</i> on pages 283-287, DOI: 10.11646/zootaxa.5115.2.7, <a href="http://zenodo.org/record/6352464">http://zenodo.org/record/6352464</a>
CR1 Knops blood group alleles are not associated with severe malaria in the Gambia
No full textThe Knops blood group antigen erythrocyte polymorphisms have been associated with reduced falciparum malaria-based in vitro rosette formation (putative malaria virulence factor). Having previously identified single-nucleotide polymorphisms (SNPs) in the human complement receptor 1 (CR1/CD35) gene underlying the Knops antithetical antigens Sl1/Sl2 and McC(a)/McC(b), we have now performed genotype comparisons to test associations between these two molecular variants and severe malaria in West African children living in the Gambia. While SNPs associated with Sl:2 and McC(b+) were equally distributed among malaria-infected children with severe malaria and control children not infected with malaria parasites, high allele frequencies for Sl 2 (0.800, 1,365/1,706) and McC(b) (0.385, 658/1706) were observed. Further, when compared to the Sl 1/McC(a) allele observed in all populations, the African Sl 2/McC(b) allele appears to have evolved as a result of positive selection (modified Nei-Gojobori test Ka-Ks/s.e.=1.77, P-valu
Quantum and its irreducible representations
No full textWe define for real a unital -algebra
quantizing the universal enveloping
-algebra of . The -algebra
is realized as a -subalgebra of the
Drinfeld double of and its dual Hopf -algebra
, generated by the equatorial Podle\'s sphere coideal
-subalgebra of and
its associated orthogonal coideal -subalgebra . We then classify all the irreducible
-representations of .Comment: 22 pages; author accepted manuscrip
On the sheaf-theoretic SL(2, C) Casson–Lin invariant
No full textWe prove that the (τ-weighted, sheaf-theoretic) SL(2, C) Casson–Lin invariant introduced by Manolescu and the first author is generically independent of the parameter τ and additive under connected sums of knots in integral homology 3-spheres. This addresses two questions asked by Manolescu and the first author. Our arguments involve a mix of topology and algebraic geometry, and rely crucially on the fact that the SL(2, C) Casson–Lin invariant admits an alternative interpretation via the theory of Behrend functions.</p
Candidatus Rhetoricae (or Novus Candidatus).
No full textThis little book is a find whatever it finally turns out to be! For now it seems to be a Jesuit collegium text in rhetoric following the Progymnasmata of Aphthonius. If one works from the back of the book, there is an apparently independent 48-page work, Angelus Pacis by Nicolas Caussini (Latinized name), S.J. The rest of the book seems to be a commentary on or presentation of Aphthonius' Progymnasmata in 3 parts covering 435 pages, followed by a T of C and an AI, which is often one page off. Pars II is titled Rhetoricae Praecepta, Pars III De Panegyrico seu Laudatione. Pars I seems to be Apparatus ad Fabulam et Narrationem. Fable is handled on 15-31. After the famous Greek definition of Theion done into Latin ( sermo falsus veritatem effingens ), the author distinguishes rational (human) and moral (animal) fables, with mixed fables including both. He holds (19) that the sense of the fable generally needs to be expressed; otherwise people often miss the point of a fable. His Latin for promythium is praefabulatio, for epimythium affabulatio. Apologus and parabola are identical for him with fabula. After describing the qualities and uses of fables, the author presents some nine fables that exemplify various levels of style, twice telling the same stories on two levels (WL and FC). The last example is of the florid style: The Silkworm and the Spider takes four pages to tell! I found this book sitting in a box of disparate, unmarked, old books. It pays to look!This is a hardbound book (hard cover)Language note: Bilingual: Greek/LatinElzevers
Searches for New Physics effects in b →sl-sl+ transitions
No full textThe dissertation aims at presenting the current situation in the measurements of electroweak
penguin diagrams dominated decays: b → sl−l+1 . These decays have been a smoking gun
for hunting for New Physics effects over many years, but in the last three years the research
on these phenomena has intensified due to new measurements. Enormous progress has
been made both on the theoretical and the experimental sides to understand the measured
deviations from the current Standard Model predictions, referred to in what follows as
“anomalies”. The author of this dissertation has been one of the main authors of the angular analysis
of B0→ K∗ 0µ+µ− decay in the LHCb experiment, which has been widely regarded as one
of the most important results of the flavour physics sector in recent years. He has proposed
a method called “the method of moments” to measure the angular terms of this decay,
which he has later successfully applied in the measurement itself. Moreover, he has been
the driving force behind the two other important analyses in LHCb: the measurement of
the angular distribution and branching ratio of the B0→ K∗ 0 (1430)µ+µ− decay, where again the method of moments has been used to obtain the angular coefficients, and the search for the light scalar particle that can be produced in the b → s transitions and that decays to a dimuon pair. In this case no signal has been observed and the upper limits on the branching fraction have been set, later to be used for constraining the inflaton model.
The dissertation is organized as follows: the brief introduction is followed by, the second
chapter devoted to a theoretical description of rare B decays, where the effective field
theory formalism is introduced. Furthermore, the author discusses the current theoretical
problems in calculating the Standard Model predictions for the b → sl−l+ processes. Last but not least, the optimised angular observables that are less dependent on the form
factors uncertainness are derived. The third chapter describes the experimental apparatus
used in the b → sl−l+ measurements. Special focus is put on the sub-detectors that play
an important role in the studies of b → sl−l+ transitions. Chapters 4, 5, 6 are devoted to
describing the data analyses performed by the author in the LHCb experiment. In Chapter 7
the global analysis of electroweak penguin decays is presented. This kind of global analysis
has become extremely popular in the past few years as it helps to constrain and pin down those New Physics models that are likely to be responsible for the observed anomalies. The
author of this monograph is involved in one of the biggest collaborations performing New
Physics fits, where he is the convenor of the Flavour Working group. Furthermore, the
author presents his own study on separating the long distance effects in the B0→ K∗ 0µ+µ−decay. This is the state of the art way of determining those contributions. The chapter ends with a description of possible New Physics models that can explain the observed discrepancies
contravariant function-valued valuations on polytopes
No full textWe present a complete classification of contravariant,
-valued valuations on polytopes, without any
additional assumptions.It extends the previous results of the second author
[Int. Math. Res. Not. 2020] which have a good connection with the and
Orlicz Brunn-Minkowski theory. Additionally, our results deduce a complete
classification of contravariant symmetric-tensor-valued
valuations on polytopes
The Laurent Extension of Quantum Plane: a Complete List of Uq(sl₂)-Symmetries
No full textThis work finishes a classification of Uq(sl₂)-symmetries on the Laurent extension Cq[x±¹,y±¹] of the quantum plane. After reproducing the partial results of a previous paper of the author related to symmetries with non-trivial action of the Cartan generator(s) of Uq(sl₂) and the generic symmetries, a complete collection of non-generic symmetries is presented. Together, these collections constitute a complete list of Uq(sl₂)-symmetries on Cq[x±¹,y±¹].The author would like to thank the anonymous referees for a large number of comments and suggestions that substantially improved the initial version of this paper
Constructing Thin Subgroups in SL(4, R)
No full textWe give a construction for new families of thin subgroups inside SL(4,R). In particular, we show that the fundamental group of a closed hyperbolic 3-manifold can be isomorphic to a thin subgroup of a lattice. © The Author(s) 2013
Properties of the Racahpolynomials with regard to the Lie algebrarepresentation of sl(2;C)
No full textThe Racah polynomial Rn(λ(x)) is a polynomial of degree n and is variable in λ(x). In this thesis two properties of this polynomial will be studied. One is the orthogonal property of the Racah polynomial. And the other is that the Racah polynomial can also be described as a polynomial of degree x and variable over λ(n). The Racah polynomials will be studied with the use of a representation of the Lie algebra of sl(2;C) and hypergeometric series. To do this, this Lie algebra will first be defined and then we will work towards defining the tensor product of three representations of the Lie algebra sl(2;C). From the tensor product, a series representation for the Racah polynomials will be found, which can be rewritten to a hypergeometric series. Then, the orthogonal property of sl(2;C) will be used to study the orthogonal property of the Racah polynomials. And the polynomial will be rewritten as a polynomial of degree x with the use of some identities of the hypergeometric series
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