30,855 research outputs found
A potent sex attractant of the male tea tussock moth, Euproctis pseudoconspersa (Strand) (Lepidoptera; Lymantridae) in Taiwan: Field and EAG responses.
No full textAnálise do acoplamento pressão-velocidade nas equações de Navier-Stokes utilizando o método dos volumes finitos baseado em elementos e solução acoplada
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-graduação em Engenharia Mecânica.Este trabalho tem como objetivo estudar os métodos FIELDS e Rhie-Chow para tratamento do acoplamento pressão-velocidade na solução das equações de Navier-Stokes e realizar sua implementação computacional. Estes métodos apresentam diferentes maneiras de introduzir a pressão na equação de conservação da massa para a solução acoplada da pressão e velocidade. Ambos se utilizam de técnicas baseadas em funções de interpolação, que são decorrentes das próprias equações de conservação da quantidade de movimento, de forma a estabelecer um forte acoplamento entre as variáveis das equações. A aplicação em malhas não-estruturadas é realizada através do método dos volumes finitos baseado em elementos. Com o simulador desenvolvido, os métodos FIELDS e Rhie-Chow são avaliados através da solução de problemas conhecidos na literatura. Primeiro, são realizadas avaliações individuais dos métodos quanto à sua estabilidade e consistência. Em seguida são traçados comparativos entre as soluções obtidas. São analisadas características como: qualidade das soluções, convergência, influência do passo de tempo, tempos de solução dos sistemas lineares e montagem da matriz de coeficientes. The main goal of this work is the study of the FIELDS and Rhie-Chow methods for treatment of the pressure-velocity coupling in the solution of the Navier-Stokes equations and develop their computational codes. These methods have different ways of introducing the pressure in the mass conservation equation when a coupled solution is sought. Both use techniques based on interpolation functions, which come from the momentum conservation equations, in a way that a strong coupling between the equations is established. The use on unstructured meshes is performed by the element based finite volume method. The FIELDS and Rhie-Chow methods are evaluated by solving well-known testing problems from the literature. First, they are individually evaluated based on their stability and robustness. Then, the solutions are compared and analyzed according to the following criteria: solution quality, convergence, time step influence, CPU time spent to solve linear systems and assembling the global coefficient matrix
. 49 Tomo I (1967-1968) Séptima Época (1967-1976). Anales del Instituto Nacional de Antropología e Historia
No full textPublicación que recopila y difunde cien años de trabajo de la antropología en México (1877-1977), integrada por documentos y manuscritos arqueológicos, antropológicos, históricos, geológicos, botánicos y lingüísticos.- Información general de las actividades del Instituto Nacional de Antropología e Historia durante los años 1967-1968 por Ignacio Bernal. - Dos elementos de uso ritual en el arte olmeca por María Antonieta Cervantes. - Las ruinas del Rancho de San Pablo, Becanchén, Yucatán por William J. Folan. - Reconocimiento del sitio Varejonal, municipio de Jiquipilas, Chiapas por Pierre Agrinier. - Conservatismo en el simbolismo de Oaxaca: un breve informe por Frank H. Boos. - La lengua de Huehuetán (Maliwi) por Carlos Robles Uribe y Roberto D. Bruce S. - Términos de parentesco del náhuatl. Dialecto del norte de Puebla por Earl Brockway. - Un nexo prehistórico entre quechua y tarasco por Mauricio Swadesh. - El tuzanteco y su posición dentro de la familia mayense por Otto Schummann. - Noticia del mame de Tuxtla Chico por Roberto H. Escalante. - Differential Pueblos specialization in fetishes and shrines por Florence Hawley Ellis. - Una leyenda mixteca por Jorge Poulat Legorreta. - Los pimas bajos de la Sierra Madre Occidental por Margarita Nolasco Armas. - Los choloques y los cholultecas. Apuntes sobre las relaciones étnicas en Cholula hasta el siglo XVI por Mercedes Olivera y Cayetano Reyes. - Fray Servando Teresa de Mier y la Sociadad Lautaro por José R. Guzmán. - Casas en que vivió el capitán don Juan de Chavarría Valera por Pedro Álvarez y Gasca
Measurement of the inclusive φ cross-section in pp collisions at √s=7 TeV
No full textThe cross-section for inclusive φ meson production in pp collisions at a centre-of-mass energy of √s = 7 TeV has been measured with the LHCb detector at the Large Hadron Collider. The differential cross-section is measured as a function of the φ transverse momentum pT and rapidity y in the region 0.6< pT <5.0 GeV/c and 2.44< y <4.06. The cross-section for inclusive φ production in this kinematic range is σ(pp→φX)=1758±19(stat) +43−14(syst)±182(scale) μb, where the first systematic uncertainty depends on the pT and y region and the second is related to the overall scale. Predictions based on the Pythia 6.4 generator underestimate the cross-section
. 47 Tomo XVIII (1965) Sexta Época (1939-1966). Anales del Instituto Nacional de Antropología e Historia
No full textPublicación que recopila y difunde cien años de trabajo de la antropología en México (1877-1977), integrada por documentos y manuscritos arqueológicos, antropológicos, históricos, geológicos, botánicos y lingüísticos.- Información general de las actividades del Instituto Nacional de Antropología e Historia durante el año 1965 por Eusebio Dávalos Hurtado. - La osteopatología en los teotihuacanos por Eusebio Dávalos Hurtado. - Sobre la autenticidad de algunas "cabezas reducidas" de los jíbaros por Víctor M. Becerril S. - Fonémica del guajirío por Roberto Escalante H. - La danza de "Los Montezumas" por Eduardo Matos Moctezuma. - Jerarquía maya entre los dioses lacandones por Roberto D. Bruce S. - La familia en Tlaxcalancingo. Un problema de desorganización social por Mercedes Olivera. - Los seris, desierto y mar por Margarita Nolasco Armas. - En torno a los factores que detienen el desarrollo en Chiapas, Guerrero y Tabasco por Manlio Barbosa Cano. - Andrés Molina Enríquez y la Sociedad Indianista Mexicana: el indigenismo en vísperas de la Revolución por Guillermo Bonfil Batalla. - Una lamentación de Jeremías compuesta en el siglo XVI para el uso de la Catedral de México por Thomas Stanford
Prompt charm production in pp collisions at √<span style="text-decoration:overline">s</span>=7 TeV
No full textCharm production at the LHC in pp collisions at s√=7 TeV is studied with the LHCb detector. The decays D0→K−π+, D+→K−π+π+, D⁎+→D0(K−π+)π+, D+s→ϕ(K−K+)π+, Λ+c→pK−π+, and their charge conjugates are analysed in a data set corresponding to an integrated luminosity of 15 nb−1. Differential cross-sections dσ/dpT are measured for prompt production of the five charmed hadron species in bins of transverse momentum and rapidity in the region 0<pT<8 GeV/c and 2.0<y<4.5. Theoretical predictions are compared to the measured differential cross-sections. The integrated cross-sections of the charm hadrons are computed in the above pT-y range, and their ratios are reported. A combination of the five integrated cross-section measurements gives
σ(cc¯)pT<8 GeV/c,2.0<y<4.5=1419±12(stat)±116(syst)±65(frag) μb,
where the uncertainties are statistical, systematic, and due to the fragmentation functions
Bibliographics for the 983 eprints in the live archives of E-LIS : trends and status report up to 7th July 2004, based on author-self-archiving metadata
No full textThe priority for ideas and philosophy related to "Network Theory" have been traced back and documented by Braun(2004),and credit goes to Karinthy(1929).The IT has empowered to realise it, as the most practical phenomena and it is no more a humour. The OAI (Open Archives Initiatives)and ACIS (Academic Contributor Information System)are progressive in the direction ,which may lead to realise the "Collective Genius" at global level. Focus of present study is on Author-Self-Archiving (A-S-A)Metadata of the 983 Eprints in the Live Archives of the E-LIS (EPrints of Library and Information Science),which were approved till 7th July 2004.The A-S-A Metadata was used for librametric analysis. Self-explanatory bibliographics are illustrated.The highlights include: Conference papers (34%); highest approval, June 2004 (28%); published archives (76%);not refereed (52%); not in public domain (60%); highest self-archiving-author (De Robbio, Antonella).The Nos. of EPrints having single JITA domain specifications were: Theoretical and general aspects of libraries and information(27); Information use and sociology of information(80);Users,literacy and reading(13);Libraries as physical collections(30);Publishing and legal issues(57);Management(13);Industry, profession and education(36);Information sources, supports, channels(113) ; Information treatment for information services, Information functions and techniques (101); Technical services libraries, archives and museums(25); Housing technologies(1); Information technology and library technology(92); and Inter-domainery (395) i.e. having specifications of two or more than two JITA classes
New insights on accretion in supergiant fast X-ray transients from XMM-Newton and INTEGRAL observations of IGR J17544-2619
No full textXMM–Newton observations of the supergiant fast X-ray transient IGR J17544?2619 are reported and placed in the context of an analysis of archival INTEGRAL/IBIS data that provide a refined estimate of the orbital period at 4.9272?±?0.0004?d. A complete outburst history across the INTEGRAL mission is reported. Although the new XMM–Newton observations (each lasting ?15 ks) targeted the peak flux in the phase-folded hard X-ray light curve of IGR J17544?2619, no bright outbursts were observed, the source spending the majority of the exposure at intermediate luminosities of the order of several 1033?erg?s?1 (0.5–10 keV) and displaying only low level flickering activity. For the final portion of the exposure, the luminosity of IGR J17544?2619 dropped to ?4?×?1032?erg?s?1 (0.5–10 keV), comparable with the lowest luminosities ever detected from this source, despite the observations being taken near to periastron. We consider the possible orbital geometry of IGR J17544?2619 and the implications for the nature of the mass transfer and accretion mechanisms for both IGR J17544?2619 and the supergiant fast X-ray transients (SFXTs) population. We conclude that accretion under the ‘quasi-spherical accretion’ model provides a good description of the behaviour of IGR J17544?2619 and suggests an additional mechanism for generating outbursts based upon the mass accumulation rate in the hot shell (atmosphere) that forms around the neutron star under the quasi-spherical formulation. Hence, we hope to aid in explaining the varied outburst behaviours observed across the SFXT population with a consistent underlying physical model
Branching fraction and CP asymmetry of the decays B+→K0Sπ+ and B+→K0SK+
No full textAn analysis of B+ → K0
Sπ+ and B+ → K0
S K+ decays is performed with the LHCb experiment. The pp
collision data used correspond to integrated luminosities of 1 fb−1 and 2 fb−1 collected at centre-ofmass
energies of
√
s = 7 TeV and
√
s = 8 TeV, respectively. The ratio of branching fractions and the
direct CP asymmetries are measured to be B(B+ → K0
S K+
)/B(B+ → K0
Sπ+
) = 0.064 ± 0.009 (stat.) ±
0.004 (syst.), ACP(B+ → K0
Sπ+
) = −0.022 ± 0.025 (stat.) ± 0.010 (syst.) and ACP(B+ → K0
S K+
) =
−0.21 ± 0.14 (stat.) ± 0.01 (syst.). The data sample taken at
√
s = 7 TeV is used to search for
B+
c
→ K0
S K+ decays and results in the upper limit ( fc · B(B+
c
→ K0
S K+
))/( fu · B(B+ → K0
Sπ+
)) <
5.8 × 10−2 at 90% confidence level, where fc and fu denote the hadronisation fractions of a ¯b
quark
into a B+
c or a B+ meson, respectively
Measurement of the branching fraction
No full textThe B
0
s
→ J/ψK
0
S
branching fraction is measured in a data sample corresponding to 0.41 fb−1
of integrated luminosity collected with the LHCb detector at the LHC. This channel is sensitive to
the penguin contributions affecting the sin 2β measurement from B
0
→ J/ψK
0
S
. The time-integrated
branching fraction is measured to be B(B
0
s
→ J/ψK
0
S
) = (1.83±0.28)×10−5
. This is the most precise
measurement to date
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