87,898 research outputs found
Cretasquatina americana Maisey & Ehret & Denton 2020, new species
No full textCretasquatina americana, new species DIAGNOSIS: As for genus. ETYMOLOGY: From the Latinized version of the name Amerigo. HOLOTYPE: ALMNH 2792 (figs. 2–4, 7, 10, 11), from the Early Campanian Mooreville Chalk (unnamed member below the Arcola Limestone Member), Harrell Station Paleontological Site, Marion Junction, Dallas County, Alabama: an associated series of six anterior vertebrae (ALMNH 2792 -C; fig. 2), an almost complete left palatoquadrate approximately 125 mm long (ALMNH 2792 -A), most of a ceratohyal approximately 120 mm long (ALMNH 2792 -B), a small fragment of cartilage from the braincase, possibly part of the postorbital process (ALMNH 2792 -D), plus numerous smaller indeterminate fragments of tessellated calcified cartilage (hereafter abbreviated to TCC). REFERRED MATERIAL: ALMNH 1040 (fig. 8), including: almost complete right palatoquadrate approx. 143 mm long (ALMNH 1040-A); anterior part of left palatoquadrate (ALMNH 1040-B); two fragments of expanded arcualia from the first vertebra (ALMNH 1040-C); incomplete second vertebra (ALMNH 1040-D); vertebral centrum of uncertain position (ALMNH 1040-E.); heavily abraded vertebral centrum showing fine concentric rings (ALMNH 1040-F); numerous indeterminate fragments of calcified cartilage.Published as part of Maisey, John G., Ehret, Dana J. & Denton, John S. S., 2020, A new genus of Late Cretaceous angel shark (Elasmobranchii; Squatinidae), with comments on squatinid phylogeny, pp. 1 in American Museum Novitates 2020 (3954) on page 1, DOI: 10.1206/3954.1, http://zenodo.org/record/535551
Die Verteilung unternehmerischer Rollen in der Leistungserstellung - Eine Entrepreneurship-Perspektive
No full textEstudo das ligas intermetalicas Cu33AL67 e Fe33Sn67 nanoestruturadas preparadas por mechanical alloying
No full textDissertação (Mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas.Este trabalho é parte de um amplo projeto de pesquisa sobre materiais nanoestruturados fabricados por Mechanical Alloying que o Grupo de Física do Estado Sólido da UFSC vem realizando. As ligas Fe33Sn67 e CU33Al67 possuem grande importância tecnológica. Devido as elevadas diferenças nos pontos de fusão dos elementos químicos, a obtenção destas ligas pelas técnicas convencionais apresentam grandes dificuldades, sendo estas superadas quando a técnica Mechanical Alloying é utilizada para a fabricação das mesmas. As técnicas de difração de raios-x e calorimetria diferencial de varredura (DSC) foram usadas no estudo das propriedades estruturais destas ligas. Os difratogramas de difração de raios-x da liga Fe33Sn67 tal como coletada e tratada termicamente foram indexados a uma rede tetragonal denominada de fase , com parâmetros de rede a = b = 6,5234 Â e c = 5,3373 Â e, a = b = 6,5369 A e c = 5,3328 Â, respectivamente. O tamanho médio encontrados para os cristalitos foram L = 164 A e L = 297 A, respectivamente. Os padrões de difração de raios-x da liga CU33Al67 tal como foi coletada e tratada termicamente foram indexados a uma rede tetragonal denominada de fase O, com parâmetros de rede a = b = 6,0636 Â e c = 4,8848 Â e, a = b =6,0547 Â e c = 4,8719 Â, respectivamente e a uma rede cúbica de face centrada (alumínio) com parâmetros de rede a = 4,0994 Â e a = 4,0993 Â, respectivamente. O tamanho médio calculados para os cristalitos da fase tetragonal foram L = 80 Â e L = 358 Â e, para a rede fc.c. foram L = 109 Â e L = 360 Â. O tratamento térmico precipitou uma nova fase na liga CU33Al67, sendo esta, possivelmente, monoclínica com o tamanho médio dos cristalitos em tomo de L = 294 A. Portanto, neste trabalho, obtemos ligas com uma estrutura nanométrica. O programa DBWS, utilizado para simular padrões de difração de raios-x, confirmou a presença da fase tetragonal nestas ligas e de alumínio metálico na liga CU33Al67 nanoestruturada
Variations on the Author
No full text“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Kundenintegration und die Gestaltung von Geschäftsmodellen - Der Fall Siemens Cerberus ECO
No full text[Newspaper Clipping: Author Claims Evidence of Second JFK Assassin #1]
No full textNewspaper article titled "Author Claims Evidence of Second JFK Assassin." The article states that author Richard J. Whalen concluded "that there is circumstantial evidence to support the theory of a second assassin in the shooting of President John F. Kennedy.
Energy-momentum tensor from Wilson flow in lattice φ4-theory
No full textThe energy-momentum tensor (EMT) is the Noether current associated with
translations. It is of interest because, first of all, it has physical meaning as it
contains the energy density and the momentum density. Moreover, its trace can
be related to the beta function so that the scaling behaviour of the theory at
hand can be studied. We are particularly interested in the scaling behaviour of
strongly coupled theories. To explore the strong coupling regime it is necessary
to compute the EMT non-perturbatively, i.e. on the lattice. This complicates
matters greatly. On the lattice translation invariance is broken which leads to
additional terms in the translation Ward identity from which the EMT is derived.
This results in turn in the need to renormalise the EMT on the lattice.
In this thesis we extend recent studies on the renormalisation of the EMT
in four-dimensional gauge theory to the case of a three-dimensional scalar
theory to investigate its divergence structure and the numerical feasibility of the
suggested procedure on a more basic level. Furthermore, scalar φ4-theory in three
dimensions exhibits an infrared fixed point and can thus serve as a toy model to
examine mechanisms for building theories beyond the standard model.
Our strategy to renormalise the EMT on the lattice is to identify all possible terms
that can mix with both sides of the translation Ward identity. The renormalised
EMT is a combination of operators of the same or lower dimension obeying
the symmetries of the theory. The mixing is determined by requiring that the
renormalised EMT satisfies the correct Ward identities. Using different probes
in the translation Ward identity one can compute the coefficients of the EMT
by solving a linear system of equations. However, contact terms can arise. One
solution is the recently introduced Wilson flow. Its renormalisation properties allow for expectation values free of contact terms. That way the Wilson flow provides for a meaningful theoretical formulation of the EMT on the lattice that can be used in practice.
In this thesis we review the renormalisation properties and the phase diagram
of scalar φ4-theory in three dimensions, the translation Ward identity and the
EMT in the continuum, as well as the gradient flow for scalar theory. A large
part is dedicated to the perturbative renormalisation of the EMT on the lattice.
Finally, our strategy to compute the renormalisation constants of the EMT in
scalar theory non-perturbatively is discussed in detail, and our results for the
renormalisation constants are presented
Also By The Same Author: AKTiveAuthor, a Citation Graph Approach to Name Disambiguation
No full textThe desire for definitive data and the semantic web drive for inference over heterogeneous data sources requires co-reference resolution to be performed on those data. In particular, name disambiguation is required to allow accurate publication lists, citation counts and impact measures to be determined. This paper describes a graph-based approach to author disambiguation on large-scale citation networks. Using self-citation, co-authorship and document source analyses, AKTiveAuthor clusters papers, achieving precision of 0.997 and recall of 0.818 over a test group of eight surname clusters
John F. Kennedy telegram to Roosevelt
No full textJersey Homesteads (later the Borough of Roosevelt) was established in the 1930s as an agro-industrial cooperative community. It was established specifically for urban Jewish garment workers, many of whom had emigrated from Europe. President John F. Kennedy sent a telegram to the citizens of Roosevelt, New Jersey, apologizing for not being able to attend the memorial dedication in honor of former President Franklin Delano Roosevelt. (Jersey Homesteads became Roosevelt in 1945 in honor of the president.) President Kennedy expressed his gratitude to the people of Roosevelt for constructing the memorial, and commented that it will serve as a constant reminder of Roosevelt's good works
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