199,020 research outputs found
Acylophorus nitens Lott 2010
No full textAcylophorus nitens Lott, 2010 (Fig. 2) Material examined. BOTSWANA: Okavango Delta, Moremi Wildlife Reserve, 18 O 14 ’S 23 O 21 ’E, M Uhlig, 10.iii. 1994, 1Ƥ (ZMHB); Shakawe: banks of Okavango, 18 O 22 ’S 21 O 49 ’E, M Uhlig, 3.iii. 1994, 131Ƥ (ZMHB). NAMIBIA: Kavango: Mahango Game Reserve, banks of Okavango, 18 O 14 ’S 21 O 43 ’E, M & B Uhlig, 24.xi. 1993, 30.iii. 1999, 3 (ZMHB); Kavango: Popa Falls, banks of Okavango, 18 O 7 ’S 21 O 35 ’E, M Uhlig, 26.ii– 3. iii. 1992, 4 (ZMHB). SOUTH AFRICA: Western Cape: Wilderness NP, Langvlei, Malachite Bird Hide, 33 O 59 ’S 22 O 40 ’E, M & B Uhlig 30.xi. 1996, 23 (ZMBH). SUDAN: Melut, Taufikia, J. Konietsko 25.xii. 1913, 1Ƥ (ZMBH). TANZA- NIA: Konde: “Langenburg”, Fülleborn, 8.viii. 1899, 13 (ZMHB). ZAMBIA: Rimo-Marine Motel, banks of Kafue River, 15 O 49 ’S 28 O 12 ’E, M Uhlig, 17.iii. 1993, 13 (ZMHB). Discussion. The new records extend the known range of A. nitens to four new countries: Tanzania, Namibia, Botswana and South Africa. Fig. 2 updates the distribution map given by Lott (2010). The additional material studied exhibited wide variation in body colour, which supports the observation by Lott (2010) that particular geographic areas may be populated by distinctive colour forms. Zambian populations are dominated by individuals with bright orange pronota that contrast strongly with other body parts. Similar specimens also occur along the Okavango River, although they are mixed with specimens with darker pronota. The bodies of all the specimens examined from Zimbabwe, South Africa and Sierra Leone are uniformly dark in colour, although the number of specimens seen is too small to conclude with any confidence that these are dominant colour forms in these areas.Published as part of Lott, Derek A., 2012, Further studies of African Acylophorus Nordmann (Coleoptera: Staphylinidae: Staphylininae), pp. 39-52 in Zootaxa 3168 on pages 41-42, DOI: 10.5281/zenodo.27978
Mean square error for the Leland-Lott hedging strategy: convex pay-offs.
No full textLeland’s approach to the hedging of derivatives under proportional transaction costs is based on an approximate replication of the European-type contingent claim V T using the classical Black–Scholes formula with a suitably enlarged volatility. The formal mathematical framework is a scheme of series, i.e., a sequence of models with transaction cost coefficients k n =k 0 n −α , where α∈[0,1/2] and n is the number of portfolio revision dates. The enlarged volatility in general depends on n except for the case which was investigated in detail by Lott, to whom belongs the first rigorous result on convergence of the approximating portfolio value to the pay-off V T . In this paper, we consider only the Lott case α=1/2. We prove first, for an arbitrary pay-off V T =G(S T ) where G is a convex piecewise smooth function, that the mean square approximation error converges to zero with rate n −1/2 in L 2 and find the first order term of the asymptotics. We are working in a setting with non-uniform revision intervals and establish the asymptotic expansion when the revision dates are , where the strictly increasing scale function g:[0,1]→[0,1] and its inverse f are continuous with their first and second derivatives on the whole interval, or g(t)=1−(1−t) β , β≥1. We show that the sequence converges in law to a random variable which is the terminal value of a component of a two-dimensional Markov diffusion process and calculate the limit. Our central result is a functional limit theorem for the discrepancy process.Diffusion approximation; Martingale limit theorem; European option; approximate hedging; transaction costs; Leland-Lott strategy; Black-Scholes formula;
Acylophorus salifi Lott 2010
No full text<i>Acylophorus salifi</i> Lott, 2010 <p>(Fig. 22)</p> <p> <b>Material examined. NAMIBIA</b>: Kavango: Popa Falls, banks of Okavango, 18O7’S 21O35’E, M Uhlig, 27.ii.1992, 2.iii.1992, 13.iii.1992, 1.iv, 1993, 17.iv.1993, 22 (ZMHB).</p> <p> <b>Discussion.</b> The new records extend the known range of <i>A. salifi</i> to Namibia. Fig. 20 updates the distribution map given by Lott (2010). The bodies of all the Namibian specimens are coloured black with reddish elytra. This is the dominant colour form both in the southern populations found in Zambia and Zimbabwe and in West African populations. In the Congo catchment, the dominant colour form consists of a uniform brown colour and populations are subject to considerable variation in the form of the aedeagus. It may be that the Congolese populations represent a complex of species.</p>Published as part of <i>Lott, Derek A., 2012, Further studies of African Acylophorus Nordmann (Coleoptera: Staphylinidae: Staphylininae), pp. 39-52 in Zootaxa 3168</i> on pages 47-48, DOI: <a href="http://zenodo.org/record/279788">10.5281/zenodo.279788</a>
George M. Lott Tennis Center and Courts
No full text2323 N. Sheffield AvenueAerial view of the George M. Lott Tennis Center courts looking southeast.The George M. Lott Tennis Center and Courts originally stood on the site of the Sullivan Athletic Center.Buildings; Photographs and Illustration
Acylophorus minor Lott, new species
No full textAcylophorus minor Lott, new species (Figs 20, 69, 96, 131) Description. Length 5 –5.5mm. Body dark brown with pronotum and apical margins of abdominal tergites paler. Abdominal tergites iridescent. Appendages red-brown, apical segments of antennae yellow. Head small (pronotum 2 x wider than head), more or less as long as wide with temples barely suggested (Fig. 20). Antennae inserted right on front margin with no pigmented area in front. Genae well developed and produced at sides of front margin. No micro-punctures visible at 80 x magnification. Short pubescence behind eyes localised and very sparse. Two pairs of interocular setae arising from foveate punctures much closer to eyes than each other and five postocular setae visible from above on each side. No extra seta by hind margin of eye. Underside of head weakly depressed at base. Gular sutures continued to base of head, converging toward base but well separated throughout their length. Mandibles similar to A. salifi. Maxillary palpi with terminal segment densely pubescent, markedly asymmetric, longer than short, triangular, penultimate segment, which is glabrous (Fig. 69). First segment of antenna longer than next four (Fig. 96). Segments I to V elongate, VII to XI transverse. Pronotum less transverse than in A. salifi (1.2x wider than long) with rounded sides and widest in basal half. Shining with no micro-punctures. One pair of dorsal setae. One pair of lateral setae. Marginal setae long. Elytra strongly transverse (1.8x wider than long) with pubescence arising from fine, asperate punctures. Fringe of bristles on hind margin longer than the hairs on the rest of the elytra. Asperate punctures on abdominal tergites stronger than on elytra, denser toward base. Paramere bilobed, each lobe weakly arched and curved inwards at apex, pegs confusedly arranged in apical half of each lobe (Fig. 131). Median lobe longer than paramere, expanded at apex which is rounded. Type material. Holotype 3: “ CÔTE D’IVOIRE Riv. Sassandra / MUSÉUM PARIS 12-1930 - IV- 1931 P.A. CHAPUIS / Acylophorus Pauliani Brh Typ / Chicago NHMUS M. Bernhauer Collection / HOLOTYPE Acylophorus minor sp. n. 3 det. DA Lott, 2009 ” (FMNH). Paratypes 13: “K 431 OPRS NIGERIA 1951 / PARATYPE Acylophorus minor sp. n. 3 det. DA Lott, 2009 ” (MMUM); 1 Ƥ: “K 700 IBADAN NIGERIA 21 4 53 / PARATYPE Acylophorus minor sp. n. 3 det. DA Lott, 2009 ” (MMUM); 1 Ƥ: “K 711 IBADAN NIGERIA 14 4 53 / PARATYPE Acylophorus minor sp. n. 3 det. DA Lott, 2009 ” (MMUM). This species was given the manuscript name, A. pauliani by Bernhauer and a type was labelled accordingly, but he never published a description of the species. Distribution and bionomics. Only known from four specimens collected in Côte d’Ivoire and Nigeria (Fig. 146). There are no ecological data. Comparative notes. Similar to A. lomaensis. Distinguished by the form of the aedeagus. Etymology. The specific name is the masculine form of the comparative adjective meaning “lesser” and refers to the relatively small size of the species.Published as part of Lott, Derek A., 2010, The species of Acylophorus Nordmann (Coleoptera: Staphylinidae: Staphylininae) in continental sub-Saharan Africa, pp. 1-51 in Zootaxa 2402 on pages 28-29, DOI: 10.5281/zenodo.27590
Limit Theorem for a Modified Leland Hedging Strategy under Constant Transaction Costs rate
No full textWe study the Leland model for hedging portfolios in the presence of a constant proportional transaction costs coefficient. The modified Leland's strategy recently defined by the second author, contrarily to the classical one, ensures the asymptotic replication of a large class of payoff. In this setting, we prove a limit theorem for the deviation between the real portfolio and the payoff. As Pergamenshchikov did in the framework of the usual Leland's strategy, we identify the rate of convergence and the associated limit distribution. This rate turns out to be improved using the modified strategy and non periodic revision dates.Asymptotic hedging ; Leland-Lott strategy ; Transaction costs ; Martingale limit theorem.
Acylophorus makhoreae Lott, new species
No full textAcylophorus makhoreae Lott, new species (Figs 8, 38, 58, 84, 116) Description. Length 7mm. Body colour very variable ranging from pale brown to black. Pronotum yellow to red-brown with a dark, diffuse mark covering the disc and sometimes suffused almost to the edges. Abdomen iridescent when dark. Appendages similarly variable in colour, but the terminal segment of the maxillary palpi is always darker than the penultimate segment. Head of average size (pronotum 1.75x wider than head), more or less as long as wide with rounded temples not very evident (Fig. 8). Pigmented area of head extending well in front of antennal insertion. Micropunctures extending over much of head, but very sparse away from the front of the head and next to the eyes. Dense short pubescence behind eyes. Two pairs of interocular setae arising from foveate punctures much closer to eyes than each other. Only four postocular setae visible from above on each side. Underside of head sparsely pubescent, depressed at base with gular sutures separate, but very proximate toward base. Right mandible with one sharp median tooth; left mandible lacking sharp tooth (Fig. 38). Maxillary palpi with terminal segment densely pubescent, with rounded angle on outer margin, asymmetric and less elongate than A. orientalis, longer than glabrous penultimate segment which is slightly elongate (Fig. 58). First segment of antenna as long as next five. Segments I to IV elongate, VII to XI transverse (Fig. 84). Pronotum only slightly transverse (1.1x wider than long) with rounded sides and widest in basal half. Shining with no micro-punctures. Dorsal, lateral and marginal setae shorter than in A. orientalis. Elytra transverse (1.7x wider than long) with pubescence arising from asperate punctures. Apical fringe of bristles longer than the hairs on the rest of the elytra. Abdominal tergites with evenly spaced, relatively sparse asperate punctures. Paramere bilobed, each lobe fairly flat, at least toward apex, pegs concentrated in dense mass at apex (Fig. 116). Median lobe longer than paramere with truncate apex. Type material. Holotype 3: “Under plants at a stream edge / ETHIOPIA: Kaffa 28km. S. of Jimma 2,000 m’ xi. 1971 / R. O.S. Clark B.M. 1973 - 450 / HOLOTYPE Acylophorus makhoreae sp. n. 3 det. DA Lott, 2009 ” (BMNH). Paratypes 13 1 Ƥ: “ ETHIOPIA: ILUBADOR 10km. W. Bedelle 0825N 3618 E x. 1972 1,800 m. / R. O.S. Clark B.M. 1973 - 450 / PARATYPE Acylophorus makhoreae sp. n. det. DA Lott, 2009 ” (BMNH); 4: “Under plants & stones at edge stream / ETHIOPIA: Kaffa Belleta F. 2,100 m 40km. S.W. Jimma 1971 / R. O.S. Clark B.M. 1973 - 450 / PARATYPE Acylophorus makhoreae sp. n. det. DA Lott, 2009 ” (BMNH); 1 Ƥ: “ih red ref. / ETHIOPIA: Kaffa Jimma to Addis Rd. 0749- 370 iii. 1972. / R. O.S. Clark B.M. 1973 - 450 / PARATYPE Acylophorus makhoreae sp. n. det. DA Lott, 2009 ” (BMNH). Distribution and bionomics. All material seen so far comes from the south-west of Ethiopia (Fig. 142). I have also seen a female specimen collected at “ 8,000 ” feet from the Djem-Djem Forest to the west of Addis Ababa that may belong to this species. Most of the specimens were collected along streams. Comparative notes. Fairly distinct within the A. orientalis species group by virtue of the position of the antennal insertion, the broader, more asymmetric terminal segment of the maxillary palpi and the more transverse medial antennal segments. The form of the aedeagus and the arrangement of medial teeth on the mandibles are also useful characters. Etymology. Makhore was a legendary queen, who founded the kingdom of Jimma in the area where many of the type specimens were collected. The species name is the genitive case of a Latinised version of her name. Discussion. A. makhoreae has been placed in the A. orientalis group, because it lacks dense micropunctures on the head and pronotum. However, the form of the maxillary palpi, the mandibles and the aedeagus and the position of the antennal insertion point all suggest that it may be more closely related to some of the species in the A. densipennis group.Published as part of Lott, Derek A., 2010, The species of Acylophorus Nordmann (Coleoptera: Staphylinidae: Staphylininae) in continental sub-Saharan Africa, pp. 1-51 in Zootaxa 2402 on page 15, DOI: 10.5281/zenodo.27590
George M. Lott Tennis Center and Courts
No full textAerial view of the tennis courts loking southeast.The George M. Lott Tennis Center and Courts originally stood on the site of the Sullivan Athletic Center.Buildings; Photographs and Illustration
Lott Residence
No full textDrawing from a set of 4 sheets of architectural drawings of the Lott residence project, showing north, south, east and west elevations.Pencil on pape
Acylophorus acufer Lott, new species
No full textAcylophorus acufer Lott, new species (Figs 23–28) Description. Length 5.5 –6.5mm. Body black except for dark chestnut margins of pronotum and the apical abdominal tergites, which are paler at both base and apex. Abdomen iridescent to varying degrees. Legs red. Antennae pale or dark with segment I always pale at base. Maxillary palpi usually all pale. Head small (pronotum 2.1x wider than head), more or less as long as wide with wide neck and temples barely suggested (Fig. 23). Antennae inserted right on front margin with no pigmented area in front. No micro-punctures visible at 80 x magnification. Short pubescence behind eyes localised and sparse. Two pairs of interocular setae arising from foveate punctures much closer to eyes than each other and five postocular setae visible from above on each side. No extra seta by hind margin of eye. Mandibles short with wide basal flange, a vestigial medial tooth discernible on the left mandible (Fig. 24). Maxillary palpi with terminal segment densely pubescent, narrow and more or less symmetric, longer than penultimate segment, which is short, triangular and glabrous (Fig. 25). First segment of antenna as long as next four (Fig. 26). Segments I to V elongate, VII to XI transverse. Pronotum slightly transverse (1.2x wider than long) with rounded sides and widest in basal half. Shining with no micro-punctures. One pair of dorsal setae. One pair of lateral setae. Marginal setae long. Elytra strongly transverse (1.7x wider than long) with pubescence arising from fine, asperate punctures. Fringe of bristles on hind margin longer than the hairs on the rest of the elytra. Empodial setae between claws on mid- and hind tarsi very short. Asperate punctures on abdominal tergites denser at base, pubescence longer than on elytra. Male with apex of sternite IX entire. Paramere bilobed, each lobe long and pointed, needle-shaped, much longer than median lobe of aedeagus, pegs confusedly arranged around or slightly in front of mid-point of each lobe (Figs 27 and 28). Median lobe barely expanded at apex which is rounded. Type material. Holotype 3: “ Namibia 30.iii. 1999 18 O 14 ’S / 21 O 43 ’E Mahango GR, Kwetche piknik site, banks of Okavango, shore washing, lg M. + B. Uhlig / HOLOTYPE Acylophorus acufer sp. n. 3 det. DA Lott, 2010 ” (ZMHB). Paratypes 536 Ƥ same data as holotype (ZMHB, cJanak); 3: “NAMIBIA-Exp. ZMB 1992 Mahango Game Reserve, Seeufer, Ufervegetation gesiebt, 18 O 17 ’S / 21 O 43 ’E 28.II. 92, leg M. Uhlig” (ZMHB); 1 Ƥ: “ NAMIBIA 24.xi. 1993 18 O 14 ’S / 21 O 43 ’E Kavango: Mahango Game Reserve: Okavango Papyrus sievings, leg Uhlig” (ZMHB); 8: “ NAMIBIA 1 + 4.iii. 1994 Kavango: Piknik site, Okavango banks, sievings, flood refuse, reed leaf litter, grass leg M. Uhlig” (ZMHB); 131 Ƥ: “ NAMIBIA 1 + 4.iii. 1994 18 O 14 ’S / 21 O 43 ’E Kavango: Mahango Game Reserve, Baobab, Okavango banks, sievings, flood refuse, leg M. Uhlig” (ZMHB); 6: “NAMIBIA-Exp. ZMB 1992 Buffalo Camp, Kavango-Ufer, Ufervegetation gesiebt, 18 O09’S / 21 O 42 ’E 28.II. 92, leg M. Uhlig” (ZMHB); 6: “NAMIBIA-Exp. ZMB 1992 Popa Falls, Kavango-Ufer, Ufervegetation gesiebt, 18 O07’S / 21 O 35 ’E 27.II. 92, leg M. Uhlig” (ZMHB); 97: “NAMIBIA-Exp. ZMB 1992 Popa Falls, Kavango-Ufer, Schilf – Papyrus - Ufervegetation gesiebt, 18 O07’S / 21 O 35 ’E 2.III. 92, leg M. Uhlig” (ZMHB); 16: “NAMIBIA-Exp. ZMB 1992 Popa Falls, 18 O07’S / 21 O 35 ’E Kavango-Ufer, Schilf – Papyrus - Ufervegetation gesiebt, 13.III. 92, leg M. Uhlig” (ZMHB); 8: “ NAMIBIA 1.iv. 1993 18 O07’ 16 ”S / 21 O 34 ’ 51 ”E Popa Falls, island banks of Okavango banks, reed - papyrus sievings, leg Uhlig” (ZMHB); 7: “ NAMIBIA 17.iv. 1993 18 O07’ 16 ”S / 21 O 34 ’ 51 ”E Popa Falls, island banks of Okavango banks, sievings: reed + papyrus, leg M. Uhlig” (ZMHB); 5: “ NAMIBIA 28.ii – 6. iii. 1994 18 O07’ 16 ”S / 21 O 34 ’ 51 ”E Popa Falls, Okavango banks, sievings, Papyrus, reed, grass, leaf litter, leg M. Uhlig” (ZMHB); 5: “ BOTSWANA 3.iii. 1994 18 O 48 ’S / 22 O08’E Sepupa, Okavango-Delta, sievings: grass + flood refuse, leg M. Uhlig” (ZMHB); 1 Ƥ: “ BOTSWANA 6.iv. 1998 Shakawe Fishing Camp 18 O 27 ’S / 21 O 56 ’E leg J. Deckert, gesiebt” (ZMHB). Distribution and bionomics. All records to date of this species come from the Okavango River system in Botswana and Namibia, where it appears to be the most frequently collected species of Acylophorus. Specimens were mainly obtained by sieving marsh litter, but a few specimens were collected by splashing riverbanks. Comparative notes. This species can be distinguished from both A. salifi and A. lomaensis by the less transverse pronotum, the more slender last segment of the maxillary palpi and, above all, by the form of the male genitalia. In addition, it is larger and darker than A. lomaensis. Populations of A. salifi occurring along the Okavango appear to be of the typical colour form (mainly black with reddish elytra), so colour may be an additional character that is useful for distinguishing A. acufer and A. salifi in the field. Etymology. This specific name is a noun in apposition meaning “bearer of needles”, a reference to the extraordinary shape of the parameres.Published as part of Lott, Derek A., 2012, Further studies of African Acylophorus Nordmann (Coleoptera: Staphylinidae: Staphylininae), pp. 39-52 in Zootaxa 3168 on page 49, DOI: 10.5281/zenodo.27978
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