1,382 research outputs found
Austin Papers: Series IV, 1831-1834
No full textCopy of transcript for a letter to Stephen F. Austin, in which the author both provides a reference for Henry B. Prentiss, and asks Austin to introduce Prentiss to friends and business contacts in Bexar, Matamoras, Saltillo, Zacatecas, and Mexico
The construction of Karen Karnak: The multi-author-function
No full textThis thesis is situated within the comparatively recent developments of Web 2.0 and the emergence of interactive WikiMedia, and explores the mode of authorship within a Read/Write culture compared to that of a Read/Only tradition. The hypothesis of this study is that the role of the audience has become merged with the author, and as such, represents new functions and attributes, distinct from a more conventional concept of authorship, in which the roles of audience and author are more separate. Read/Write and participatory culture, as defined by this study, is focused on collaboration, and includes the influences of D.I.Y. culture, Open-Source practices and the production of text by multiple authors. Multi-authorship presents a re-thinking of several concepts which support the notion of the individual author, since the focus of multi-authorship is not on attribution and ownership of a finished text, but on the continued malleability of a text. Modes of multi-authorship, demonstrated in the use of the pseudonyms Alan Smithee and Karen Eliot, represent declarative authors whose names signify multiple origins, whilst concurrently indicating a distinct body of work. The function of these names form an important context to this study, since primary research involves the construction of an experimental mode of multi-authorship utilising WikiMedia technology and the interaction of thirty nine participants, who are invited to create a body of work under the collective pseudonym Karen Karnak. The data generated by this experiment is analysed using aspects of Michel Foucault's author-function to identify and determine power structures inherent in the WikiMedia context. The interplay of power structures, including concepts such as identity, ownership and the body of work, affect the resulting mode of authorship and contribute to the construction of Karen Karnak, suggesting further areas of research into the emerging multi-author
Baeus matthewi Stevens & Austin, 2007, sp. nov.
No full text9. Baeus matthewi, Stevens, sp. nov. (Figs 11A & B, 16A) Holotype, [[female]], Queensland, ' 12.41S142.41E, QLD, 5 km S Batavia Downs. 23 Aug-16 Sep 1992. Flight Intercept trap P. Zborowski & L. Miller ' (ANIC). Paratypes: Queensland: 2 [[females]], Eungella N.P., 29.xi.1976, Boucek, 8-9.v. 1980, I.D. Naumann & J.C. Cardale (ANIC); 1 [[female]], Tinaroo Creek Rd, 26 km up via Mareeba, 12-28.i.1983, Storey & Brown (ANIC); 2 [[females]], same data as holotype (ANIC); 1 [[female]], Heathlands, 11.45S142.35E, 25.vii-18.viii.1992, P. Zborowski & J. Cardale (ANIC); 1 [[female]], Mt Haig, 17.06S145.36E, 4.ii-17.iii.1995, P. Zborowski (ANIC); 1 [[female]], Mt Edith, 17.06S145.37E, 30.vi-31.vii.1995, P. Zborowski (ANIC); Australian Capital Territory: 1 [[female]], Canberra, Black Mountain, 36.16S149.06E, 22-28.ii.1998, yellow pan trap, G. Gibson; South Australia: 3 [[females]], Brachina Gorge, 31.30S138.34E, 4-10.xi.1987, I. Naumann & J. Cardale (ANIC). Description. Female. Mean length 0.82 mm (0.74-0.86; n = 5); body and head range from black to dark brown, legs and antennae yellow with darker markings on dorsal surfaces. Head. 2.25 (2.17-2.38) x as wide as inter-ocular distance, and 1.86 (1.59-2.00) x as wide as long; medial ocellus 15 µm in diameter, 82 (80-90) µm from posterior head margin; lateral ocelli touching eye margin, 20 µm from posterior head margin; lateral ocelli very close to ( 15 µm in length. Metasoma. T2 length 0.90 (0.89-0.91) x width, sculpturing coriarious, pilosity mostly sparse, but can be of moderate density in medial anterior areas, is mostly of medium length, often bordering on short, which it can be in areas; T3 coriarious anteriorly with wide smooth, nitid band along posterior margin, one row of setae present along posterior extremity of sculpturing; T4 glabrous. Comments. Baeus matthewi is clearly recognisable from other species because of its large hind femoral spine that is very distinct under stereo-light microscopey. The only other species to possess such large spines is B. vulcanus, which also has large propodeal spiracles (opening? 20 µm in diameter) that are clearly distinguishable from the smaller spiracles of B. matthewi. This species has mainly been collected along Cape York Peninsula as far south as Mareeba, except for several specimens collected from the Flinders Ranges in South Australia, and from Canberra (Fig. 16A). The contrasting climatic conditions among the regions possibly indicates that the distribution of Baeus spp. is largely determined by host distribution rather than environmental conditions. This species is named after the brother of the senior author, Mr Matthew Stevens.Published as part of Stevens, N. B. & Austin, A. D., 2007, Systematics, distribution and biology of the Australian ' micro-flea' wasps, Baeus spp. (Hymenoptera: Scelionidae): parasitoids of spider eggs., pp. 1-45 in Zootaxa 1499 on pages 27-2
Spatial associations of dockless shared e-scooter usage
No full textIn this study, we explore the usage of e-scooter sharing services in Austin, Texas over about a six-month period. The study is based on trip records of all the shared e-scooter operators in Austin and includes trip start and end locations. We use both analysis of trip patterns and spatial regression techniques to examine how the built environment, land use, and demographics affect e-scooter trip generation. Our findings show that people use e-scooters almost exclusively in central Austin. Commuting does not seem to be the main trip purpose, and usage of e-scooters is associated with areas with high employment rates, and in areas with bicycle infrastructure. People use e-scooter sharing regardless of the affluence of the neighborhood, although less affluent areas with high usage rates have large student populations, suggesting that students use this mode of travel. Implications for planners suggest that better bicycle infrastructure will facilitate e-scooter usage, college towns are a ready market for e-scooter sharing services, and e-scooters may be a substitute for some short non-work trips, reducing car usage, and benefiting the environment.Peer reviewe
Baeus arthuri Stevens & Austin, 2007, sp. nov.
No full text1. Baeus arthuri, Stevens, sp. nov. (Figs 4A, 5A, 6A & B, 7A, 15A) Holotype, [[female]], Queensland, ' N. Qld: East Palmerston, 15.v.1991, R. Piper' (ANIC). Paratypes: Queensland: 28 [[females]], 4 [[males]], same data as holotype (ANIC, WINC); 6 [[females]], 11.45S142.35E, Heathlands, 23.v-18.vi.1993, P. Zborowski & I.D. Naumann, F.I.T. (ANIC); 15 [[females]], 11.45S142.35E, Heathlands, 25.vii-18.viii.1992, P. Zborowski & J. Cardale, M.T. (ANIC, WINC); 1 [[female]], 11.45S142.35E, Heathlands, 21.x-22.xi.1992, P. Zborowski & A. Calder, F.I.T. (ANIC); 2 [[females]], 11.45S142.35E, Heathlands, 5.iv-23.v.1993, P. Zborowski & A. Roach, F.I.T. (ANIC); 2 [[females]], 11.45S142.35E, Heathlands, 18.ix-21.x.1992, P. Zborowski & T. Weir, F.I.T. (ANIC); 1 [[female]], 11.45S142.35E, Heathlands, 25.iv-7.vii.1992, T. McLeod, M.T. (ANIC); 7 [[females]], 12.41S142.41E, 5km S Batavia Downs, 23.viii-16.ix.1992, P. Zborowski & L. Miller, F.I.T. (ANIC); 6 [[females]], 13.43S143.19E, 15km WNW Bald Hill, McIlwraith Range, 420m, 27.vi-12.vii.1989, I. D. Naumann, pan trap (ANIC); 1 [[female]], 16.52S145.40E, Lake Placid, Barron River, 7.vi.1996, C.J. Burwell (ANIC); 1 [[female]], Conway Range, 2.xii.76, Boucek (ANIC); 1 [[female]], 15.16S144.59E, 14km WbyN of Hope Vale Mission, 7-10.v.1981, I.D. Naumann (ANIC); Northern Territory: 1 [[female]], Wangi Falls, Litchfield National Park, xi.1992, A.D. Austin & P.C. Dangerfield (WINC); Papua New Guinea: 1 [[female]], Awar Bush Street, 21.vi.1982, 24.vii.1982, 31.vii.1982, 12.x.1982, P. Grootaert (CNC); 1 [[female]], Morobe Pr.Wau Ecology Institute, viii.1983, S. & P. Miller (CNC); Fiji: 1 [[female]], Vanua Leevu, Mt Delaikara, 700m, 21.vii.1987, Monteith and Cook, pyrethrum /logs and trees (QM). Description. Female. Mean length 1.04 mm (0.93-1.12 mm; n = 10); body dark brown, almost black, head dark brown, legs and antennae yellow with darker colouration dorsally. Head. 2.2 (2.08-2.33) x as wide as inter-ocular distance, and 2.19 (1.73-2.58) x as wide as length; medial ocellus level with surface of vertex; medial ocellus 10 µm in diameter, 120 (110-130) µm from posterior head margin; lateral ocelli 10 µm from eye margin, and 24 (2.0-3.0) µm from posterior head margin; posterior ocellar line 1.3 (1.24-1.3) x inter-ocular distance; vertex coriarious, pilosity sparse with mixture of short and medium length setae (medium length mostly within 10-15 µm range, not exceeding 20 µm); eyes circular, eye height 0.5 (0.45-0.49) x head height, eye width 0.7 (0.61-0.74) x eye length, pilosity minute, appearing absent under stereo-light microscope; frontal carina not prominent, fine and short, reaching 0.45 (0.42-0.48) distance to medial ocellus; cristulations of malar region not reaching to within 10 µm of eye margin; gena sinuate with anterior and posterior genal margins strongly convergent medially in postero-lateral view; anterior genal margin in contact with 0.3 (0.2-0.3) of ventral eye margin length; posterior eye margin contacting hyperoccipital carina. Mesosoma. Length 0.43 (0.41-0.46) x width; mesoscutum finely coriarious, pilosity sparse and mostly of medium length, but can be short in patches; mesoscutellum smooth, with one row of setae present medio-dorsally, sparsely spaced and of medium length; propodeum glabrous medio-dorsally; mesoscutum length 0.32 (0.29-0.36) x width, 0.56 (0.53-0.58) x mesosoma length and 2.28 (2.20-2.50) x mesoscutellum length; mesoscutellum length 1.32 (1.0-1.67) x propodeum length; dorso-lateral mesopleuron and propodeum anterior to propodeal spiracle scrobiculate; dorso-lateral propodeum posterior of spiracle smooth and bearing fine short setae; dorsal and lateral propodeum clearly delineated by broad laterally projecting carina (e.g. Fig. 10C); posterior margin of metapleuron mostly straight, except curving sharply towards mesopleuron dorsally, dorsal extent of suture is above level of antero-lateral margin of T2, posterior margin elevated above anterior margin of lateral propodeum; hind femoral spine absent. Metasoma. T2 length 0.93 (0.9-0.96) x width, faintly coriarious to smooth, pilosity sparsely scattered and mostly short, but can be of medium length in patches, posterior margin extending ventrally past ventral margin of pronotum; T3 smooth with one row of setae, sparsely spaced and short, may appear devoid of setae; T4 glabrous. Description. Male. Mean length 1.11 mm (1.06-1.16; n = 2); Head. 1.5 (1.3-1.6) x as wide as inter-ocular distance and 2.5 (2.3-2.8) x as wide as long; medial ocellus 22 µm in diameter, 110 (99-121) µm from posterior head margin; lateral ocelli 22 µm from eye margin, 35.8 (33-38.5) µm from posterior head margin; posterior ocellar line equal to inter-ocular distance; eyes ovoid, eye height 0.51 x head height; frontal carina reaching> 0.5 distance to medial ocellus; in postero-lateral view, anterior and posterior genal margins slightly convergent medially; anterior genal margin contacting the entire length of ventral eye margin; posterior eye margin> 45 µm from hyperoccipital carina. Mesosoma. Length 1.13 x width; mesoscutum length 0.9 x width, 0.68 x mesosoma length; propodeal spiracle small and round; hind femoral spine absent. Metasoma. T1 transverse, length 0.18 (0.17-0.19) x width; T2 length 0.5 (0.4-0.6) x width. Comments. This is a large species, characterised by sparse and short pilosity, with mostly smooth, shiny dorsal surfaces, and gena being sinuate with strongly convergent margins medially. Baeus arthuri is most similar to B. scrobiculus except the dorsal surfaces are smoother, and the scrobiculate sculpturing of the dorso-lateral propodeum is not as extensive. The holotype, along with 28 female and four male paratypes, were all reared from a single, unidentified host egg-sac. Therefore, B. arthuri is one of only a few Australian Baeus species that has reliably associated males. Baeus arthuri is confined to the more tropical areas of northern Australia (Fig 15A) and extends to Papua New Guinea and Fiji. This species is named after the father of the senior author, Mr Arthur Stevens.Published as part of Stevens, N. B. & Austin, A. D., 2007, Systematics, distribution and biology of the Australian ' micro-flea' wasps, Baeus spp. (Hymenoptera: Scelionidae): parasitoids of spider eggs., pp. 1-45 in Zootaxa 1499 on pages 15-1
Rashba torque beyond the Boltzmann regime
No full textWe study spin torques induced by Rashba spin-orbit coupling in two-dimensional ferromagnets under the good-metal condition is an element of(F)tau/h >> 1 (is an element of(F) the Fermi energy, tau the electron lifetime) by employing the Kubo formula. We find that in the presence of spin-dependent disorder the Rashba torque changes greatly as the system evolves out of the weak-disorder limit where h/tau is much smaller than any intrinsic energy scale characterizing the multiband structure. The antidamping-like component of Rashba torque can be comparable to and larger than the field-like one out of the weak-disorder limit. The semiclassical Boltzmann theory produces the same results as microscopic linear response calculations only in the weak-disorder limit. Our analysis indicates that rich behaviors of various nonequilibrium phenomena beyond the Boltzmann theory may also be present even when is an element of(F)tau/h >> 1 in multiband systems where is an element of(F) is not the unique intrinsic energy scale.National Basic Research Program of China [2013CB921900]; DOE (Division of Materials Science and Engineering) [DE-FG03-02ER45958]; NSF [EFMA-1641101]; Welch Foundation [F-1255]; DOE GrantSCI(E)ARTICLE39
Sisurcana recurvana Austin & Dombroskie 2020, new
No full textSisurcana recurvana (Zeller), new combination (Figs. 8, 13, 19) Tortrix recurvana Zeller, 1866: 143 Cacoecia recurvana: [unknown author, date] (new combination). “ Archips ” recurvana: Powell et al. 1995: 148 (new combination). [Archipini unplaced] recurvana: Brown 2005: 124. Type material.— Tortrix recurvana Zeller, 1866: Lectotype, ♀: COLOMBIA: EX. 66,173 f.5., Zeller Coll., Walsingham Collection, 1910-427, 102210 [examined]. B[ritish] M[useum] Genitalia slide #7851, Razowski genitalia slide #5361 [examined] (BMNH). Discussion.—Zeller described Tortrix recurvana from two females, but it is unclear who designated the female that we figure (Fig. 8) as the lectotype. Powell (1986) commented on this species in his description of Sisurcana, but refrained from transferring it to that genus. Tortrix recurvana is extremely similar in forewing pattern (Fig. 8) and in genitalia to Sisurcana sanguinoventer Razowski and Wojtusiak, 2010. However, the cestum in T. recurvana terminates before the corpus bursae (Fig. 19), but not in S. sanguinoventer. We examined a third female specimen from the BMNH collected in Peru (KAA diss. #0135), which looks like a smaller version of T. recurvana, but the apophyses are noticeably longer. It may represent an undescribed species. Based on similarities between T. recurvana and S. sanguinoventer, we transfer T. recurvana to Sisurcana. Males of both of these species are unknown, but may be described and simply unassociated because of the extreme sexual dimorphism in Atteriini.Published as part of Austin, Kyhl A. & Dombroskie, Jason J., 2020, New Combinations In Neotropical Archipini And Atteriini (Lepidoptera: Tortricidae: Tortricinae), With The Description Of A New Genus, pp. 1-11 in Proceedings of the Entomological Society of Washington 122 (1) on page 8, DOI: 10.4289/0013-8797.122.1.1In, http://zenodo.org/record/372476
Semiclassical theory of spin-orbit torques in disordered multiband electron systems
No full textWe study spin-orbit torques (SOT) in nondegenerate multiband electron systems in the weak-disorder limit. In order to have better physical transparency, a semiclassical Boltzmann approach equivalent to the Kubo diagrammatic approach in the noncrossing approximation is formulated. This semiclassical framework accounts for the interband-coherence effects induced by both the electric field and static impurity scattering. Using the two-dimensional Rashba ferromagnet as a model system, we show that the antidamping-like SOT arising from disorder-induced interband-coherence effects is very sensitive to the structure of disorder potential in the internal space and may have the same sign as the intrinsic SOT in the presence of spin-dependent disorder. While the cancellation of this SOT and the intrinsic one occurs only in the case of spin-independent short-range disorder.National Basic Research Program of China (NBRPC) [2013CB921900]; DOE (Division of Materials Science and Engineering) [DE-FG03-02ER45958]; NSF [EFMA-1641101]; Welch Foundation [F-1255]; DOE grantSCI(E)ARTICLE49
Tagging of Biomedical Articles on CiteULike: A Comparison of User, Author and Professional Indexing
No full textThis paper examines the context of online indexing from the viewpoint of three different groups: users, authors, and professional indexers. User tags, author keywords and descriptors were collected from academic journal articles, which were both indexed in Pubmed and tagged on CiteULike, and analysed. Descriptive statistics, informetric measures, and thesaural term comparison shows that there are important differences in the use of keywords between the three groups in addition to similarities which can be used to enhance support for search and browse. While tags and author keywords were found that matched descriptors exactly, other terms which did not match but provided important expansion to the indexing lexicon were found. These additional terms could be used to enhance support for searching and browsing in article databases as well as to provide invaluable data for entry vocabulary and emergent terminology for regular updates to indexing systems. Additionally, the study suggests that tags support organisation by association to task, projects and subject while making important connections to traditional systems which classify into subject categories
Austin y searle: la relación entre verbos y actos ilocucionarios
No full textEl presente artículo intenta dar cuenta de la relación entre los actos de habla y la semántica a partir de los criterios utilizados por Austin y Searle en la elaboración desús respectivas taxonomías de actos ilocucionarios. Para esto, se rastrean bibliográficamentealgunos de los conceptos que utiliza Austin en sus conferencias de Harvard de 1955 (Austin, 1996) con la pretensión de intentar desambiguar en parte los criterios utilizados en la elaboración de sus categorías de verbos ilocucionarios. Luego, se revisan algunos conceptos de Searle y su taxonomía de actos ilocucionarios descritos en "Actos de Habla" (Searle, 1994); y desarrollados en "Una taxonomía de los actos ilocucionarios"(Searle, 1991 b). Finalmente, a partir de la revisión de las clasificaciones y la discusión de la idea de significado que sustenta cada autor se obtiene que el significado de los verbos no depende solamente de su constitución léxica dada, sino que además se potencia en la interacción o uso de una expresión en una emisión real, en que se constituye como acto ilocucionario.IThe present article reviews thecriteria used by Austin and Searleon elabora-ting their respective taxonomies of illocutionary acts to account for the way in which speech acts and semantics relate both authors. In addition, some concepts of Searle and his taxonomy described in "Speech Acts" (1994) and developed in "A taxonomyof Illocutionary acts" (1991) are reviewed.Finally, the idea of meaning sustained by each author is discussed
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