84,024 research outputs found
Oral History Interview with J. C. Matthews, April 4, 1984
No full textInterview with former president of the North Texas State College and the North Texas State University, J. C. Matthews from Denton, Texas. In the interview, Matthews shares his thoughts and experiences concerning the desegregation of intercollegiate athletics at North Texas State College in 1956
Supplementary Materials for 'Design of Factorial Experiments in Blocks and Stages'
No full textThis dataset contains the plots discussed in Chapters 4 and 5 and Appendix B and C of the thesis 'Design of Factorial Experiments in Blocks and Stages' by Emily Matthews, which was submitted for the degree of Doctor of Philosophy in July 2015. </span
Disruption of the developmental programme of Trypanosoma brucei by genetic ablation of TbZFP1, a differentiation-enriched CCCH protein
No full textThe regulation of differentiation is particularly important in microbial eukaryotes that inhabit multiple environments. The parasite Trypanosoma brucei is an extreme example of this, requiring exquisite gene regulation during transmission from mammals to the tsetse fly vector. Unusually, trypanosomes rely almost exclusively on post-transcriptional mechanisms for regulated gene expression. Hence, RNA binding proteins are potentially of great significance in controlling stage-regulated processes. We have previously identified TbZFP1 as a trypanosome molecule transiently enriched during differentiation to tsetse midgut procyclic forms. This small protein (101 amino acids) contains the unusual CCCH zinc finger, an RNA binding motif. Here, we show that genetic ablation of TbZFP1 compromises repositioning of the mitochondrial genome, a specific event in the strictly regulated differentiation programme. Despite this, other events that occur both before and after this remain intact. Significantly, this phenotype correlates with the TbZFP1 expression profile during differentiation. This is the first genetic disruption of a developmental regulator in T. brucei. It demonstrates that programmed events in parasite development can be uncoupled at the molecular level. It also further supports the importance of CCCH proteins in key aspects of trypanosome cell function
Claude Matthews
No full textBorn in Kentucky, Claude Matthews (1845-1898) moved to Clinton in Vermillion County around 1867. His term as governor came when the state was transforming from an agrarian society to an industrial one. He dealt with the panic of 1893, a severe nationwide depression with unemployment and bankruptcies followed by coal and rail strikes in 1894. Later he returned to his farm after a failed bid for president. He is buried in Clinton.Use of this image is restricted to IHS reference purposes only. IHS may not reproduce. Information taken from the book The Governors of Indiana, edited by Linda C. Gugin and James E. St.Clair, published by the Indiana Historical Society Press in cooperation with the Indiana Historical Bureau, State of Indiana.Destination Indiana - Governors of Indiana, 1893-1941 Journe
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Leaus Matthews & Lawrence 1992
No full textLeaus Matthews & Lawrence, 1992 (Figs 5, 10, 20 –36, 39, 40, 44, 47, 48, 50, 51, 54, 56) Type species. Leaus tasmanicus Matthews & Lawrence, 1992, by monotypy. Redescription. Adults. With the characteristics of the tribe. Length 3.9–8.4 mm. Body parallel-sided, 2.2 –3.0 times as long as wide. Upper surfaces nitid fuscous or castaneous, clothed with recumbent white setae forming patterns on dark background, also with long sparse erect pilosity. Head: Basal membrane of labrum narrow but exposed and complete. Eyes entire, broadly oval. Antennae short, not quite reaching base of prothorax, antennomeres obconic, gradually widening distally, apical segment large and suboval. Mentum small, subquadrate or a little transverse. Prothorax: Pronotum densely punctate, moderately convex, lateral carinae present. Procoxal cavities internally open. Trochantins absent. Pterothorax: Elytral disc at least slightly uneven, without striae, with partly effaced puncture rows. Wings fully developed. Legs: Procoxae subconical, approximated, projecting well below prosternum. Tarsi about as long as tibiae. Abdomen: Intercoxal process narrowly triangular. First three ventrites connate. Defensive glands present, small, widely separated. Female: Ovipositor with paraprocts elongate, about twice as long as coxites, baculi of first coxite lobes diagonal, short, coxites with four distinct pairs of lobes. Spermatheca coiled, attached to base of accessory gland. Single vaginal sclerite with median keel and transverse lateral wings. Description. Larva. With the characteristics of the tribe. Dorsal surfaces bicolored with a complex pattern of dark brown markings on a yellow background. Head with sides subparallel (Fig. 40); larger anterior epipharyngeal sensilla (Fig. 54) with anterior 2 moderately widely separated and well separated from the posterior 4, which form a subquadrate cluster; posterior sensilla forming two longitudinal rows of 4; mandibles bidentate with short subapical tooth on incisor edge; left mola with several weak transverse ridges; gula 3 times as long as wide; hypopharyngeal sclerome anteriorly trilobed. Prothorax almost as long as wide. Legs slightly longer than thoracic width and clothed with fine hairs. Abdomen about 3.5 times as long as thorax; tergum I with weak anterior carina; tergum IX (Fig. 47) slightly shorter at midline and slightly narrower than VIII, carina simple; urogomphi (Fig. 48) each with 4 setiferous tubercles at about middle; surface of concave disc lightly pigmented, dark-rimmed pits less regularly spaced and concentrated around a pair of posterolateral impressions; segment X with a pair of tubular pygopods (Fig. 44). Spiracles annular-cribriform with the peritreme completely surrounded by a cribriform plate (Fig. 56). Larval material examined: Leaus tasmanicus Matthews & Lawrence. AUS: Tasmania: Pelion (41.50 S, 146.08 E), 1991, pyrethrin knockdown, rainforest, P. Greenslade & M. Comfort (ANIC). Discussion. At the time of its description Leaus was placed in Heleini because it shows the basal tenebrionine characteristics of that tribe and, in particular, similarities to the heleine genus Lepispilus. Both Leaus and Lepispilus have pale dorsal setae which form a mottled pattern, and they share the unusual character of a vaginal sclerite. At the same time, it was mentioned that there is a resemblance between Leaus and Trachelostenus in the form of prominent coxae. Later, Matthews (2003) transferred Leaus to Titaenini, another basal tribe of Tenebrioninae, as discussed in the introduction. We now know that Titaenini as then conceived by Matthews was a paraphyletic assemblage of primitive Tenebrioninae sharing mainly plesiomorphies. Lepispilus differs from Leaus in the absence of prominent coxae, presence of a medial fleck on the wings, complete elytral epipleura, aedeagal alae not of the appendiculate type, and unique ovipositor structure. The ovipositor of Lepispilus (illustrated in Matthews & Bouchard 2008, fig. 47 C) does not resemble that of any other known tenebrionid. There is therefore no evidence of a direct relationship between Lepispilus and Leaus or any other trachelostenine. The peculiar type of spiracular opening surrounded by a cribriform plate in larvae of Leaus (called annularcribriform by Lawrence et al. 2011) is perhaps an adaptation to wetter habitats and has been found sporadically in various other unrelated families of Coleoptera including Trogossitidae-Lophocaterinae, Mycteridae-Hemipeplinae, and Chrysomelidae-Cryptocephalinae.Published as part of Matthews, Eric G. & Lawrence, John F., 2015, Trachelostenini sensu novo: redescriptions of Trachelostenus Solier, Myrmecodema Gebien and Leaus Matthews & Lawrence, based on adults and larvae, and descriptions of three new species of Leaus (Coleoptera: Tenebrionidae), pp. 289-312 in Zootaxa 4020 (2) on pages 301-304, DOI: 10.11646/zootaxa.4020.2.4, http://zenodo.org/record/23647
Memorandum from A. E. Demaray to E. C. Finney
No full textFour letters of correspondence about the purchase of Bright Angel Trail between A. E. Demaray, Acting Director of the Grand Canyon National Park; E. C. Finney, Department of the Interior First Assistant Secretary; Carl T. Hayden, Representative (AZ); and Stephen T. Mather, Director of the National Park Service
Quasar emission lines as probes of orientation: implications for disc wind geometries and unification
No full textThe incidence of broad absorption lines (BALs) in quasar samples is often interpreted in the context of a geometric unification model consisting of an accretion disc and an associated outflow. We use the Sloan Digital Sky Survey quasar sample to test this model by examining the equivalent widths (EWs) of C iv 1550 Å, Mg ii 2800 Å, [O iii] 5007 Å and C iii] 1909 Å. We find that the emission line EW distributions in BAL and non-BAL quasars are remarkably similar – a property that is inconsistent with scenarios in which a BAL outflow rises equatorially from a geometrically thin, optically thick accretion disc. We construct simple models to predict the distributions from various geometries; these models confirm the above finding and disfavour equatorial geometries. We show that obscuration, line anisotropy and general relativistic effects on the disc continuum are unlikely to hide an EW inclination dependence. We carefully examine the radio and polarization properties of BAL quasars. Both suggest that they are most likely viewed (on average) from intermediate inclinations, between type 1 and type 2 active galactic nuclei (AGN). We also find that the low-ionization BAL quasars in our sample are not confined to one region of the ‘Eigenvector 1’ parameter space. Overall, our work leads to one of the following conclusions, or some combination thereof: (i) the continuum does not emit like a geometrically thin, optically thick disc; (ii) BAL quasars are viewed from similar angles to non-BAL quasars, that is, low inclinations and (iii) geometric unification does not explain the fraction of BALs in quasar samples
Industrias y tejidos de Tuxpan, Jalisco, México.. Anales del Instituto Nacional de Antropología e Historia. Num. 43 Tomo XIV (1961) Sexta Época (1939-1966)
No full textByne, M. S. Popular Weaving and Embroidery in Spain, Madrid, 1924.Cordry, D. B. y Doroty, M. Costumes and Weaving of the Zoque Indians of Chiapas, Mexico. Southwest Museum Papers, No. 15. Los Angeles, 1941.Excelsior (El periódico de la vida nacional), No. 874, México, octubre 3 de 1937.Halversen, C. Hanbok i Vevning. Oslo, 1934.Leksand, M. Homecrafts in Sweden. Stockholm, 1939.Lumholtz, C. Unknown Mexico 2 vols. New York, 1902.Lumholtz, C. Huichol-lndianers Ornamentik. Christirana Vidensrkabs-Selskabet Skrifter, I:I. Christiania, 1906.Macías y Gil, C. y Rodríguez, A. Estudio Etnográfico de los Actuales Indios Tuxpaneca del Estado de Jalisco. Anales del Museo Nacional de Arqueología, Historia y Etnografía, T. II, No. l. México, 1910, pp. 195-219.Mason, O. T. A Primitive Frame for Weaving Narrow Fabrics. Smithsonian Institution, Annual Report, 1898-99, pp. 485-510.Matthews, W. Navajo Weavers. Third Annual Report, U. S. Bureau of Ethnology, 1881- 82. Washington, 1884, pp. 371-391.Oglesby, C. Modern Primitive Arts of Mexico, Guatemala and the Southwest. New York, 1939.Osborne, L. de J. Guatemala Textiles. Middle American Research Series, Pub. No. 6, 1935.Roth, H. L. Studies in Primitive Looms. Halifax, 1918.Russell, F. The Pima Indians. Bureau of American Ethnology, No. 26, 1904-1905.Walterstorff, E. Von. Swedish Textiles. Stockolm, 1925.Wharton, J. G. Indian Blankets and Their Makers, 1914.Woodhouse, T. The Handicraft Art of Weaving. London, 1921
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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