21,781 research outputs found
Congruence curves of the Goldstein-Petrich flows
No full textWe study the existence of contours which evolve retaining their shapes under the second Goldstein-Petrich flow. We present a proof of the existence, for each integer n >= 2, of a 1-parameter family of non-congruent Goldstein-Petrich contours of R(2) with symmetry group of order n. Explicit algorithms to compute and visualize the contours and their evolution are give
Attualità di Goldstein
No full textIl saggio intende approfondire il ruolo di Kurt Goldstein, neurologo tedesco vicino alla Gestaltpsychologie, attivo già con i feriti della I guerra mondiale, nel dibattito sul concetto di organismo e nell'affermazione della psicoterapia umanistica negli Stati Uniti del secondo dopoguerra. In particolare, si approfondisce il rapporto del lavoro dell’autore sulle afasie con la Filosofia delle forme simboliche del cugino E. Cassirer e con il contributo della scuola sovietica. Si cerca di mostrare inoltre che la concezione olistica di Goldstein lo porta a formulare un concetto di malattia come esperienza catastrofica e di guarigione come accettazione dei limiti che viene ripreso dalla fenomenologia francese negli anni cinquanta del novecento ed è apprezzabile ancora oggi in chiave di psicologia della salute
Effects of environment and genotype on hardness and alkaline cooking properties of maize / by Troy Marc Goldstein
No full textDue to the character of the original source materials and the nature of batch digitization, quality control issues may be present in this document. Please report any quality issues you encounter to [email protected], referencing the URI of the item.Bibliography: leaves 73-77.Not availabl
Johari-Goldstein Heterogeneous Dynamics in a Model Polymer
No full textThe heterogeneous character of the Johari-Goldstein (JG) relaxation is evidenced by molecular-dynamics simulation of a model polymer system. A double-peaked evolution of dynamic heterogeneity, with maxima located at JG and structural relaxation time scales, is observed and mechanistically explained. The short-time single-particle displacement during JG relaxation weakly correlates with the long-time one observed during structural relaxation
Nonexistence results for parabolic equations involving the p -Laplacian and Hardy–Leray-type inequalities on Riemannian manifolds
No full textThe main goal of this paper is twofold. The first one is to investigate the nonexistence of positive solutions for the following nonlinear parabolic partial differential equation on a noncompact Riemannian manifold M, {∂u∂t=Δp,gu+V(x)up-1+λuqinΩ×(0,T),u(x,0)=u0(x)≥0inΩ,u(x,t)=0on∂Ω×(0,T),where 1 \u3c p\u3c 2 , V∈Lloc1(Ω), q\u3e 0 , λ∈ R, Ω is bounded and has a smooth boundary in M and Δp,g is the p-Laplacian on M. The second one is to obtain Hardy- and Leray-type inequalities with remainder terms on a Riemannian manifold M that provide us concrete potentials to use in the partial differential equation we are interested in. In particular, we obtain explicit (mostly sharp) constants for these inequalities on the hyperbolic space Hn
The mantle lithosphere in Northeastern Brazil and Fernando de Noronha. Plume-related mantle metasomatism?
No full textCenozoic alkali basalts in the Rio Grande do Norte State and the Fernando de Noronha Island contain abundant spinel facies mantle xenoliths. At Pico Cabuji (NE Brazil) both protogranular and porphyroclastic xenoliths occur. The former mainly consists of lherzolites and the latter of harzburgites, with average equilibrium temperatures of 1064±6°C and 1238±7°C, respectively. Pressure is assumed essentially equal in the two groups (~1.8 GPa). Porphyroclastic xenoliths have more refractory bulk rock and mineral phase compositions than the progranular ones, in keeping with their mode. Both groups show chemical variation trends consistent with fractional melting and basalt extraction. REE profiles of clinopyroxenes vary from LREE enriched (spoon shaped) to LREE depleted in the progranular group, whereas they are dominantly slightly convex upwards in the porphyroclastic clinopyroxenes. HFSE (Ti and Zr) anomalies are in general modest in the clinopyroxenes of both groups. At Fernando de Noronha, xenoliths are variably-textured lherzolites and harzburgites. Their chemical variation trends overlap and extend those of the Pico Cabuji samples. Average temperature is 1056±87°C and pressure 1.6±0.2 GPa. Clinopyroxenes have spoon-shaped to LREE depleted profiles similar to those of the Pico Cabuji protogranular type, but have higher REE concentrations and more marked negative HFSE spikes (Fig. 1). Nd and Sr isotopes of the Pico Cabuji porphyroclastic clinopyroxenes (143Nd/144Nd = 0.51339-0.51255, 87Sr/86Sr = 0.70275-0.70319) and of Fernando de Noronha (143Nd/144Nd = 0.51323-051285, 87Sr/86Sr = 0.70323-0.70465) plot on distinct arrays originating from a similar, isotopically depleted composition and trending to lowNd-lowSr and lowNd-highSr, respectively. 143Nd/144Nd decreases, and 87Sr/86Sr increases, with increasing Mg of clinopyroxene and with all the parameters indicative of previous melting episodes (modal clinopyroxene, bulk rock MgO). The opposite correlations are observed with LREE concentration, La(N)/Sm(N), and with all the parameters reflecting metasomatic enrichment indicating different isotope and geochemical characteristics of the Pico Cabuji and Fernando de Noronha metasomatic agents. In both occurrences the premetasomatic lithosphere was isotopically similar to DMM (depleted MORB mantle) whereas the metasomatic component was EMI-like and EMII-like at Pico Cabuji and Fernando de Noronha respectively. The EMII component of Fernando de Noronha may be related with a crustal reservoir present at Fernando de Noronha and not at Pico Cabuji. The diversity of the metasomatic components between Pico Cabuji and Fernando de Noronha indicates considerable heterogeneity in their respective sources, difficult to reconcile with their supposed genetic relationship with the same plume
PSYNDEX Tests Review für GS-ST - GOLDSTEIN-SCHEERER STICK TEST
No full textThis is a PSYNDEX Tests Review of GS-ST - GOLDSTEIN-SCHEERER STICK TEST. PSYNDEX Tests Reviews are written in German and describe and evaluate psychological and educational tests used in the German-speaking countries. PSYNDEX Tests is offered by the Leibniz Institute for Psychology as open access documentation.Das ist ein PSYNDEX Tests Review zu GS-ST - GOLDSTEIN-SCHEERER STICK TEST. PSYNDEX Tests Reviews beschreiben und bewerten zentrale psychologische und pädagogische Testverfahren, die in den deutschsprachigen Ländern eingesetzt werden, nach einem standardisierten Raster. PSYNDEX Tests wird durch das Leibniz-Institut für Psychologie als Open Access Dokumentation angeboten.publishedVersio
Tribute to Joseph Goldstein
No full textJoseph Goldstein was a person of truly great public stature in our profession. When he died in March of this year, he left behind a legacy of extraordinary accomplishment. Joe was a superb and devoted teacher, as a professor of law on the Yale Law School faculty for more than forty years. He was also a creative and brilliant scholar and a prolific author
Nonlinear boundary conditions for nonlinear second order differential operators on C[0,1]
No full textOf concern is the operator script A sign defined formally by (script A sign u)(x) = φ((x,u′(x))u″(x) + ψ(x, u(x), u′(x)), with certain assumptions on φ, ψ. Realizations A of script A sign will be definedon C[0,1] and determined by boundary conditions. In earlier work we look ψ ≡ 0 and used mixed Wentzell-Robin boundary conditions of the form aj(Au)(j) + bju′(j) + cju(j) = 0, j = 0,1 where (aj,bj,cj) ≠ (0,0,0). In this paper we consider more general boundary conditions of the form αj(Au)(j) + βju′(j) ∈ γj(u(j)) where γj is a maximal monotone graph in ℝ2 and (αj,βj) ≠ (0,0). The conclusion (under suitable hypotheses) is that A is m-dissipative and Cauchy problem du/du = script A sign u, u(0) + f is well-posed
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