1,282 research outputs found
Ruptitermes araujoi Acioli & Constantino, 2015, new species
No full textRuptitermes araujoi, new species Holotype: worker from lot UnB-0225 Type-locality: BRAZIL: São Paulo: Pitangueiras (lat 21.02 S long 48.22 W) Type-repository: UnB. Paratypes: BRAZIL: Ceará: Barbalha, Chapada do Araripe, 04.ii. 2011, F.M.S. Moura col., workers (UnB- 8917). Crato, 05.x. 2004, A. Vasconcellos col., workers (UnB- 6741). Goiás: Catalão, iii. 2005, D.E. Oliveira col., workers (UnB- 10609). Formosa, Fazenda Santo Antonio, 31.i. 2012, R. Constantino col., workers (UnB- 8446). São Domingos, Monte Alto, 06.ix. 2003, D.L. Bernardo col., workers (UnB- 10610). Niquelândia, 17.vi. 2006, D.G. Pinheiro col., workers (UnB- 9901, UnB- 9902). Mato Grosso: Chapada dos Guimarães, APM Manso, 18.v. 1999, R. Constantino col., workers (UnB- 1681). Cotriguaçu, Fazenda São Nicolau, 04.vii. 2002, R. Constantino col., workers (UnB- 3349). São Paulo: Pitangueiras, 12.xi. 1995, E.P. Teixeira col., workers, imagoes (UnB-0225). Tocantins: Dianópolis, Fazenda Novo Iguaçu, 01.x. 2003, F. Godoy col., workers (UnB- 5183, UnB- 5185). Pium, Parque Estadual do Cantão, 31.v. 2007, R. Constantino col., workers (UnB- 6750). Etymology. Named in honor of the Brazilian entomologist Renato Lion Araujo (1912–1978), for his important contribution to the study of neotropical termites. Imago (Fig. 1). Head capsule dark reddish brown, paler around antennal sockets and darker around ocelli, with many long bristles and densely covered with short hairs, about 1 / 5 of the length of bristles. Eyes rounded, relatively small. Fontanelle oval, large and conspicuous, nearly white. Ocelli small, distant from eyes. Frontal marks oval, depressed, paler than head capsule. Postclypeus light brown, with many bristles and dense short hairs. Antenna light brown, same color as postclypeus. Mandibles similar to those of R. xanthochiton. Pronotum about the same width as head; anterior margin concave; lateral margins convex, converging posteriorly; light brown, with a conspicuous elongate, white spot on midline close to anterior lobe and a smaller posterior spot; with many bristles and dense short hairs. Scutum brown, a little darker than pronotum. Anterior region of scutellum a little paler than scutum; posterior margin brownish yellow. Pleural sclerites and coxae light brown; femur and tibia brownish yellow. Tergites light brown, a little paler than pronotum; sternites paler than tergites. Measurements in Table 1. Worker (Figs. 2, 22 A, 24 A). Head capsule large and rounded, reddish brown, region around antennal sockets paler; with sparse bristles and no short hairs. Postclypeus large and inflated, paler than head capsule, usually with a single bristle near the center of each lobe. Fontanelle large and conspicuous, rounded to elliptical. Frontal marks elliptical, a little paler than head capsule. Mandibles similar to those of R. xanthochiton. Procoxa typically with 10 spine-like bristles on anterior surface distributed roughly around a elliptical line (Fig. 2 C). Thoracic nota and tergites brown, paler than head capsule. Tergites with two rows of bristles and many short hairs. Dehiscent glands large, filling up to 1 / 4 of the volume of the abdomen. Enteric valve armature unsclerotized, without spines, reticulated with large cells (Fig. 24 A). Measurements in Table 2. Comparisons. The worker of R. araujoi is easily recognized by the presence of about 10 spine-like bristles on procoxa, large and inflated postclypeus, large and conspicuous fontanelle, and sparse bristles on head. The enteric valve is similar to that of R. reconditus. Distribution. Ruptitermes araujoi occurs mainly in the Cerrado region (Fig. 26), in dry forests, gallery forests, and dense cerrado (“cerradão”). Two records are from the Caatinga region, in forest habitats. The nest is subterranean.Published as part of Acioli, Agno Nonato Serrão & Constantino, Reginaldo, 2015, A taxonomic revision of the neotropical termite genus Ruptitermes (Isoptera, Termitidae, Apicotermitinae), pp. 451-492 in Zootaxa 4032 (5) on pages 455-456, DOI: 10.11646/zootaxa.4032.5.1, http://zenodo.org/record/23787
The synthesis of monodisperse alkanes with long chains
No full textThis thesis discusses reasons for the interest in monodisperse long chain alkanes and describes attempts, past and present, to synthesise such molecules. Chapter 1 discusses why the synthesis of such molecules are important and the objectives of this project. Chapter 2 reviews the methods previous groups have devised to prepare pure samples of long chain alkanes. In particular, work carried out by Whiting et al. at Bristol, whose scheme formed the basis of the early work in Durham. Chapter 3 describes the work in Durham and improvements which were made to Whiting's method, allowing the synthesis of longer chain lengths and greater quantities of materials to be achieved. Chapter 4 provides a summary of the practical work carried out by the author. Chapter 5 gives experimental details of the work described in Chapter 4
Microstructure Development during Solidification of Aluminium Alloys
No full textThis Thesis demonstrates studies on microstructure development during the solidification of aluminium alloys. New insights of structure development are presented here. Experimental techniques such as quenching and in-situ High-brilliance X-ray microscopy were utilized to study the microstructure evolution during solidification.Materials Science and EngineeringMechanical, Maritime and Materials Engineerin
Modelos de Organizaciòn Docente para la Formaciòn Online. El caso del Proyecto Alfa Miforcal
No full textFacultad de informàtica _ ULP
Red de Universitades con Carreras en Informàtica REDUNIC
Ruptitermes piliceps Acioli & Constantino, 2015, new species
No full text<i>Ruptitermes piliceps</i>, new species <p> <b>Holotype</b>: worker from lot UnB-9904</p> <p> <b>Type-locality</b>: BRAZIL: <i>Goiás</i>: Niquelândia (lat 14.1332S long 48.34W).</p> <p> <b>Type-repository</b>: UnB.</p> <p> <b>Paratypes</b>: BRAZIL: <i>Goiás</i>: Catalão, iii.2005, D.E. Oliveira col., workers (UnB-10001). Mineiros, ii.2005, D.E. Oliveira col., workers (UnB-10002). Niquelândia, 17.vi.2006, D.G. Pinheiro col., workers (UnB-9903, UnB- 9904, UnB-9905, UnB-9906). <i>Maranhão</i>: São Luís, Maracanã, 03.iv.2011, G.S. Anjos col., workers (UnB-9176). São Luís, Rangedor, 15.v.2011, G.S. Anjos col., workers (UnB-9177). <i>Mato Grosso</i>: Chapada dos Guimarães, APM Manso, 15.v.1988, K. Kitayama col., workers (UnB-1178). Chapada dos Guimarães, 09.ii.1976, R.L. Araujo col., workers (MZSP-6830). Cuiabá, 31.x.2003, F.M. Santos col., workers (UnB-4521). Juruena, 06.vii.2002, R. Constantino col., workers (UnB-3411). <i>Pará</i>: Tucuruí, 11.iv.1984, A.G. Bandeira col., workers (MPEG-2066).</p> <p> <b>Etymology.</b> From the Latin word “pilus”, hair and “ceps”, head, referring to the hairy head of the workers.</p> <p>Imago. Unknown.</p> <p> Worker (Figs. 14, 22 J, 25D). Head capsule rounded, light brown, paler anteriorly, with sparse bristles and numerous short hairs inclined anteriorly. Postclypeus inflated, paler than head capsule, with one long bristle near the center of each lobe and several hairs of variable size distributed irregularly. Fontanelle rounded or elliptical, paler than head capsule. Frontal marks oval, paler than posterior region of head capsule. Mandibles similar to those of <i>R. xanthochiton</i>; notch on left mandible forming an angle of about 45°. Thoracic nota light brown, paler than head capsule, with bristles along margins only, and not short hairs. Procoxa with 5 spine-like bristles on anterior surface, arranged along a curved line (Fig. 14 C). Meso- and metacoxa without spine-like bristles. Profemur without thick bristles on inner margin, with many thin bristles of variable size arranged irregularly. Protibia slender, not inflated, with two irregular rows of spine-like bristles along inner margin (Fig. 14 B). Tergites light brown, same color as thoracic nota, with two rows bristles and many short hairs on surface. Dehiscent glands small, usually reaching only the first abdominal segment. Enteric valve unsclerotized; ridges short, reticulated with large, faint pentagonal or hexagonal cells; cells become smaller and faint on a raised region located on the anterior part of the ridge (Fig. 25 D). Measurements in Table 2.</p> <p> <b>Comparisons.</b> The worker of <i>R. piliceps</i> is smaller and has more hairs on the head than most other species. The worker of <i>R. krishnai</i>, sp.n, is larger and the hairs on tergites are very short, nearly microscopic, while in <i>R. piliceps</i> they are longer and conspicuous.</p> <p> <b>Distribution.</b> Occurs in a large area from central to northern Brazil (Fig. 28). Most records are from forest habitats.</p>Published as part of <i>Acioli, Agno Nonato Serrão & Constantino, Reginaldo, 2015, A taxonomic revision of the neotropical termite genus Ruptitermes (Isoptera, Termitidae, Apicotermitinae), pp. 451-492 in Zootaxa 4032 (5)</i> on page 472, DOI: 10.11646/zootaxa.4032.5.1, <a href="http://zenodo.org/record/237870">http://zenodo.org/record/237870</a>
D.G. Ritchie's ethics
No full textThe British idealists of the late 19th and early 20th century are best known for their contribution to metaphysics, logic, and political philosophy. Yet they also made important contributions to social and public policy, social and moral philosophy and moral education, as shown by this volume.book chapterpublished
Painting in Poetry and Poetry in Painting: Aesthetic Reflections in D.G. Rossetti
No full textBright eyed and bushy-tailed poems and paintings are very rare, so are their past masters who create them. The history of the world literature is often brimming with such rare authors as are the unparalleled amalgamator of paintings and writings. In this field, the names, which are counted highly with boundless esteem, are of William Blake, Lewis Carroll, Hans Christian Andersen, Elizabeth Bishop, Leo Tolstoy, Lorraine Hansberry, Victor Hugo, Sylvia Plath, George Sand, Jack Kerouac, Herman Hesse, Gunter Grass, Charles Bukowski, Henry Miller, William S. Burroughs, E.E. Cummings, Tennessee Williams, Carlo Levi, J.B. Priestley, and R.N. Tagore. Undisputedly, D.G. Rossetti is one such figure. When the world literature is deconstructed, two clusters of the authors appear on the literary landscape. The first cluster consists of those authors who are painters and writers as well. The painters who have painted the literary pieces of the authors fall into the second cluster. D.G. Rossetti somewhere stands in- between. He is painter (especially illustrator) as well author-poet. But the flabbergasting certitude is that his elite poetry is found in his pieces of mural, and his elite mural in his pieces of poesy. His all creations, be they paintings, or poems, fall in three categories. In the first faction fall such pieces of his poems as are only poems—without any illustration, in the second faction fall such pieces of his paintings as are without poems, while in the third faction fall such pieces of his paintings as are with poems, or with mythical illustrations, or on certain literary pieces. Nothing to say about these groups, but one thing is clear that all of them possess aesthetic reflections. Keeping this very fact in mind, the present article aims at exploring, analyzing, and presenting the three-dimensional view in Rossetti painting and poetry with the help of the textual analysis, visual methods, and descriptive and explorative approach
Classifying sediments on Dutch riverbeds using multi-beam echo-sounder systems
No full textThe economic importance of the Dutch rivers is very high as they are heavily used for inland waterway transport between the Netherlands and their neighbouring countries. A minimum depth must be guaranteed to keep the rivers navigable but also to ensure that the ships can carry maximum cargo. An attractive system for obtaining information about the riverbed bathymetry is the multi-beam echo-sounder (MBES). Furthermore, the MBES received echoes due to acoustic backscatter from the sediments in theory also allow for discriminating between different sediments. The aim of the research presented in this thesis was to develop methods for discriminating between different river sediments using MBES measurements. In order to fulfil this aim, MBES surveys were performed in the Rhine river and the Meuse river between 2007 and 2010. The research shows that indeed the MBES system can be used for discriminating between the different sediments present in the river areas. In addition an important finding is that areas differing in sediment type require different classification approaches.Air Transport and OperationsAerospace Engineerin
Aircraft noise calculation and synthesis in a non-standard atmosphere
No full textThe atmosphere modifies the emitted sound waves of an aircraft during propagation and is therefore important in the calculation of noise contours or synthesis. Noise contours present the resulting noise levels on the ground and are, as such, often applied for regulatory purposes. Aircraft noise synthesis is a technique that allows to transform a calculated prediction into audible sound that can be experienced in a virtual reality environment. Noise synthesis techniques allow people to be subjected to aircraft, routes or procedures that are still being designed. This dissertation describes recent research to improve the modeling of atmospheric propagation effects in aircraft noise contours as well as aircraft noise synthesis. Multi-event noise contours are usually calculated with standardized models that take non-standard propagation into account in an empirical fashion. A propagation algorithm was developed to augment such a model. Signal processing steps can be applied to transform a source noise prediction into an audible result. Furthermore, such steps can be utilized to apply propagation effects to a source noise signal. For a non-standard atmosphere this is not trivial. The role of a non-standard atmosphere is described by a dedicated simulation framework developed in this dissertation. The framework is applied to a flyover to demonstrate the effects associated with multiple ray paths and shadow zones. Besides demonstrating non-standard atmospheric effects, the framework was used to create synthesized results of actual flyovers near an airport. Subsequently, a comparison between measured results and synthesized results was executed. Furthermore, a method was designed to include the effect of turbulence-induced coherence loss of the direct and ground reflected ray in noise synthesis.Aircraft Noise & Climate EffectsAerospace Engineerin
- …
