204,285 research outputs found
Hentzia alamosa Richman, 2010, new species
No full textHentzia alamosa new species Figs. 1–10, 17 Type material. — Female holotype, USA: Texas: Cuevas Amarillas, Big Bend Ranch State Park, Presidio County, Texas (29°29ʹ41.5ʺN104° 0 6ʹ 0 0ʺW, 1094.5 m), 28 March 2004, D.B. Richman, beating cottonwood along wash east of caves, deposited in the collection of Texas A & M Insect Collection (TAMUIC), College Station, Texas. Male and female paratypes: same data as holotype. Male paratype deposited in TAMUIC; female paratype deposited in the Florida State Collection of Arthropods, Gainesville, Florida. Other material. — USA: Texas: 2 females, Ojito Adentro, Big Bend Ranch State Park, Presidio County(29°29ʹ28.8ʺN, 104°0 3ʹ42ʺW, 1162 m), 14 October 2000 (TAMUIC) and 27 March 2004 (Arthropod Museum, New Mexico State University - NMSU), D.B. Richman. Beating cottonwoods. Distribution. —Known only from Big Bend area. Etymology. —The name is taken from the Spanish alamo for cottonwood, the trees on which this species has so far been collected. Diagnosis. —Males of this species would key out to Hentzia palmarum in Richman (1989), but the females have a very distinctive flattened to normal U-shaped atrium above the bell-like central structure (Figs. 4, 5, 9, 10). Hentzia palmarum has either two separate openings or these are connected as an upside-down, U-shaped depression (Figs. 11–15 and Richman (1989, figs. 24, 26). Females so far collected, with the exception of one from Ojito Adentro (TAMUIC), which had three sets of distinct paired brown spots on the dorsum, lack a pattern on their abdomen except for a few tiny spots and occasionally vague 73 streaks, whereas most H. palmarum females have at least a faint, but distinct, set of blotches and chevrons (see Kaston 1978; Richman 1989). Females of H. alamosa also have all pale legs, whereas in H. palmarum females the front pair is darker than the rest. The male chelicerae (Figs. 6, 17) differ from those of H. fimbriata, in which the teeth are evenly spaced (Richman 1989, fig. 37), and more closely resembled those of H. palmarum. However, in H. palmarum the retromarginal tooth is usually slightly more proximal than the proximal promarginal tooth (Richman 1989, figs. 18, 19), while in H. alamosa the proximal promarginal and retromarginal teeth are almost exactly in line when viewed ventrally (Fig. 17). The one male collected also had a very light band on the tip of its abdomen, which has not been seen in H. palmarum. This is the first Hentzia reported from the Chihuhuan Desert, and the type locality is approximately 385 km southwest of the nearest known records for Hentzia palmarum in Edwards County, Texas. Female. —Female holotype from Presidio County, Texas: Total length 4.2, carapace length 1.9, carapace width 1.6. Ventral spines on first tibiae 2-2-2. Leg formula 1423. Chelicerae with 2 promarginal teeth and one larger retromarginal tooth. Body almost unicolored yellowish, with two dark speckles (4–6 on paratype females) on the dorsum of the abdomen [very faint slanted bands laterally in paratype female from Cuavas Amarillas, and one female from Ojito Adentro had dark brown markings similar to those found on females of Hentzia mitrata (Hentz) (see Richman 1989, fig. 30)]. Chelicerae red-brown, endites lighter red-brown with pale distal portion. Sternum brown anteriorly, fading to yellow toward the posterior. Legs and palpi pale yellow. Male. —Male allotype (paratype) from Presidio County, Texas. Total length 4.5, carapace length 2.0, carapace width 1.7. Leg formula 1423. General description close to H. palmarum, with 2 promarginal teeth and one larger retromarginal tooth, all acute and the latter almost exactly in line with the proximal promarginal tooth (Figs. 6, 17). Abdominal pattern distinctive, with light band (appearing as spot) at tip of abdomen. However, as only one male is known this may not be a diagnostic character. Natural History. —This species seems to be closely associated with tall trees, especially, if not exclusively, cottonwoods (Fig. 1). Attempts to collect it on associated trees and shrubs along the wash at Cuevas Amarillas on the same date as the types failed, despite numerous attempts. Males are only known from March and females from March and October. Adults may be found (like H. palmarum) throughout the year. Remarks. —An illustration by Kaston (1948, fig. 1814) bares some slight resemblance to the epigynum of this species, but resembles the epigynum of H. fimbriata even more closely. On the other hand illustrations of the epigynum of H. palmarum in Peckham & Peckham (1909, plate 42, fig. 1b) and in Chickering (1944, fig. 42), as well as unpublished drawings by Wayne Maddison (see Proszynski 2007), all agree with the illustrations of Richman (1989). It is not certain exactly what species Kaston was actually illustrating, since none of the specimens examined for the revision of the genus (Richman 1989) appeared to match this drawing, which was presumably of a female from Connecticut.Published as part of David B. Richman, 2010, A new species and new records of Hentzia (Araneae: Salticidae: Dendryphantinae) from the United States, pp. 73-78 in The Journal of Arachnology 38 on pages 73-7
Alma Richman
No full textAlma Richman is pictured his school year at Roosevelt High School. He si the son of Elmer John and Florence M. Richman of Neola, Utah. He served during World War II> He married Jeanne Goodrich in 1946. He was born May 7, 1923 and died January 31, 2013
Exchanges, Claims, and Powers: About Bruno Leoni’s Social Theory
No full textIn this paper the author argues that the main intellectual contribution of the Italian jurist Bruno Leoni (1913-1967) is usually connected to his analysis of the opposition between legislation and law, between the order built by lawmakers on one side and the set of norms defined by jurists (as in Roman jus civile) or courts (as in ancient English common law) on the other. But at the core of his analysis is what he wrote about individual claims: the idea that the legal order is the outcome of specific individual activity when people demand something from the other members of society. However, he argues, that two aspects of Leoni’s theory are quite problematic. First, a philosophy identifying law with the most common claims cancels the tension between legality and legitimacy, between what is and what should be. Second, from the perspective of a general theory of law, it seems reasonable that human coexistence can be better explained if we introduce something more demanding than simple exchange and at the same time something less demanding but no less important, namely the permanent presence of violent behavior
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Quarterly Progress Report: October 1, 1991-December 31, 1991
No full textIn this quarter we accomplished two milestones. First, we qualitatively compared the approximate solutions for gravity-driven granular flows down bumpy inclines obtained by Richman and Marciniec (1990) to the experimental results for the same flows obtained by Johnson and Jackson (1990). The comparison was made by employing the reparameterized solutions of Richman and Marciniec (1990) and by analyzing several angles of inclination, coefficients of restitution, and boundary geometries. Next, we obtained exact numerical solutions of the equations of motion that were solved approximately by Richman and Marciniec (1990). We found that there are flow rates at which two flows are possible. Of the two, the less massive is more dilute, more thermalized, and faster than its more massive counterpart. In addition we found that the approximate results obtained by Richman and Marciniec (1990) for the same flows are in reasonable agreement with the numerical solutions. The numerical work is outlined in detail in the report. (VC
D-2737: 282 East 100 South, Logan, Utah, Elizabeth Guldbrandsen/Hazel L. Richman and Josie M. Kennington residence
No full textD-2737: 282 East 100 South, Logan, Utah, Elizabeth Guldbrandsen/Hazel L. Richman and Josie M. Kennington residenc
Richman, W. M.; Reynolds, W. L. Injustice On Appeal: The United States Courts of Appeals in Crisis
No full textRecenze publikace - Richman, W. M.; Reynolds, W. L. Injustice On Appeal: The United States Courts of Appeals in CrisisOxford: Oxford University Press, 2013, 237 s
Vector invariants for the two dimensional modular representation of a cyclic group of prime order
No full textIn this paper, we study the vector invariants, F[mV_2]^(C_p), of the 2-dimensional indecomposable representation V_2 of the cylic group, C_p, of order p over a field F of characteristic p. This ring of invariants was first studied by David Richman who showed that this ring required a generator of degree m(p-1), thus demonstrating that the result of Noether in characteristic 0 (that the ring of invariants of a finite group is always generated in degrees less than or equal to the order of the group) does not extend to the modular case. He also conjectured that a certain set of invariants was a generating set with a proof in the case p=2. This conjecture was proved by Campbell and Hughes. Later, Shank and Wehlau determined which elements in Richman's generating set were redundant thereby producing a minimal generating set.
We give a new proof of the result of Campbell and Hughes, Shank and Wehlau giving a minimal algebra generating set for the ring of invariants F[m V_2]^(C_p). In fact, our proof does much more. We show that our minimal generating set is also a SAGBI basis. Further, our techniques also serve to give an explicit decomposition of F[m V_2] into a direct sum of indecomposable C_p-modules. Finally, noting that our representation of C_p on V_2 is as the p-Sylow subgroup of SL_2(F_p), we are able to determine a generating set for the ring of invariants of F[m V_2]^(SL_2(F_p))
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[Kinetic Theory and Boundary Conditions for Flows of Highly Inelastic Spheres]. Quarterly Progress Report, October 1, 1991--December 31, 1991
No full textIn this quarter we accomplished two milestones. First, we qualitatively compared the approximate solutions for gravity-driven granular flows down bumpy inclines obtained by Richman and Marciniec [1990] to the experimental results for the same flows obtained by Johnson and Jackson [1990]. The comparison was made by employing the reparameterized solutions of Richman and Marciniec [1990] and by analyzing several angles of inclination, coefficients of restitution, and boundary geometries. Next, we obtained exact numerical solutions of the equations of motion that were solved approximately by Richman and Marciniec [1990]. We found that there are flow rates at which two flows are possible. Of the two, the less massive is more dilute, more thermalized, and faster than its more massive counterpart. In addition we found that the approximate results obtained by Richman and Marciniec [1990] for the same flows are in reasonable agreement with the numerical solutions. The numerical work is outlined in detail in the report. (VC
Estimating selection pressures on HIV-1 using phylogenetic likelihood models
No full textHuman immunodeficiency virus (HIV-1) can rapidly evolve due to selection pressures exerted by HIV-specific immune responses, antiviral agents, and to allow the virus to establish infection in different compartments in the body. Statistical models applied to HIV-1 sequence data can help to elucidate the nature of these selection pressures through comparisons of non-synonymous (or amino acid changing) and synonymous (or amino acid preserving) substitution rates. These models also need to take into account the non-independence of sequences due to their shared evolutionary history. We review how we have developed these methods and have applied them to characterize the evolution of HIV-1 in vivo. To illustrate our methods, we present an analysis of compartment-specific evolution of HIV-1 em) in blood and cerebrospinal fluid and of site-to-site variation in the gag gene of subtype C HIV-1. Copyright (C) 2008 John Wiley & Sons, Ltd
Hentzia fimbriata F.O. Pickard-Cambridge 1901
No full textHentzia fimbriata (F.O. Pickard-Cambridge 1901) Fig. 16 This species was adequately described by Richman (1989, pp. 306–307, figs. 37–43), but a few specimens have been collected in the United States, far north of the previously northernmost known record in Nayarit, Mexico. Based on the specimens examined it is possible that H. pima Richman 1989 is a junior synonym of H. fimbriata, as the photograph of the epigynum (Fig. 17) of a female collected from east of Sycamore Canyon resembles fig. 65 in Richman (1989), except for the openings, which in the Sycamore Canyon female are typical for H. fimbriata. The dorsal pattern of the abdomen of H. pima (Richman 1989, fig. 64) is very similar to that of the female from near Sycamore Canyon. The males collected in Sycamore Canyon and Florida Canyon closely match those of H. fimbriata. I suspect that H. pima is based on an slightly aberrant female, especially because of the relatively close geographical proximity of the type specimen from the Baboquivari Mountains. However, more material is needed either to verify H. pima as a separate species or to synonymize it with H. fimbriata. New Records. — USA: Arizona: 1 female, Santa Cruz County, Coronado National Forest, 3–6 km east of Sycamore Canyon in Pajarito Mountains (ca 31°20ʹ0 8ʺN, 111°0 8ʹ46ʺW, ca 1372 m), 29 July 1999, D.B. Richman (beating oak) (NMSU AM 832); 1 male, Sycamore Canyon, Hank and Yank Springs (ca 31°25ʹ39ʺN, 111°11ʹ33ʺW), 18 August 1992, W. Maddison, G.B.Edwards & M. McMahon (92-045); 1 male, Pima Co.: Santa Rita Mountains, Florida Canyon, Florida Station (ca 31° 46ʹ28ʺ N, 110 °52ʹ0 4ʺW), 13 April 1991, W. Maddison (91-014); 1 female, Pima Co., Santa Rita Mountains, Florida Canyon, Florida Station (ca 31° 46ʹ28ʺN, 110 °52ʹ0 4ʺW), 3 March 1994, female (presumably H. fimbriata, not identified) collected by W. Maddison (94-008) (last three records all in W. Maddison collection, University of British Columbia, Vancouver, British Columbia, Canada).Published as part of David B. Richman, 2010, A new species and new records of Hentzia (Araneae: Salticidae: Dendryphantinae) from the United States, pp. 73-78 in The Journal of Arachnology 38 on page 7
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