167,388 research outputs found
Data and software for article: Taylor-West, J. J., Balmforth, N. J., and Hogg, A. J. (2024) Lava delta formation: Mathematical modelling and laboratory experiments
No full textExperimental and numerical data and scripts required to reproduce the results of Taylor-West, Balmforth, & Hogg 2024 "Lava delta formation: Mathematical modelling and laboratory experiments". Accepted to JGR: Earth Surfaces. doi:10.1029/2023JF00750
Data and software for article: Taylor-West, J. J., Balmforth, N. J., and Hogg, A. J. (2023) Lava delta formation: Mathematical modelling and laboratory experiments
No full textExperimental and numerical data and scripts required to reproduce the results of Taylor-West, Balmforth, & Hogg 2023 "Lava delta formation: Mathematical modelling and laboratory experiments". Submitted to JGR: Earth Surfaces
Fr. Anthony J. Gittins, C.S.Sp.
No full textFr. Anthony J. Gittins, C.S.Sp. [b. 1943] was ordained in 1967. He attended the University of Edinburgh from 1968-72 and received a doctorate in Social Anthropology in 1977. Fr. Gittins was a missionary to the Mende people in Sierra Leone from 1972-80. He went on to serve as a professor at the Missionary Institute and as Formation Director in London from 1980-84. He is the Emeritus Professor of Theology and Culture at the Catholic Theological Union in Chicago, Illinois, where he began teaching in 1984. Fr. Gittins has spent over thirty years ministering to homeless women and those leaving prostitution in Chicago, and is the author of several books.https://dsc.duq.edu/sohp/1000/thumbnail.jp
Nobel Laureate Anthony J Leggett: A scientometric portrait
No full textThis paper attempts to analyse the publication productivity of Anthony J. Leggett, the 2003 Nobel Prize winner in physics. His contributions peaked in 1987, 1994, and 1998 with 10 papers each. He had 194 publications during 1964 - 2004 in domains like Superfluid 3He (65), Foundations of Quantum Mechanics (36), Dissipative Quantum Systems (24), Atomic Alkali Gases (18), and Miscellaneous (51)which were analysed for authorship pattern with his 70 collaborators. Most active collaborators with Anthony J Leggett were: A. Garg with six papers and A. O. MCaldeira, D. M. Ginsberg, D. J. Vanharlingen , F. Sols, S.Takagi and D. A. Wollman with five papers each. His productivity coefficient was 0.60 which clearly indicates that his productivity
increased after 50 percentile age. The highest degree of collaboration (1) for Anthony J. Leggett was found during 1964, 1971 and 1983. Journals have been the most preferred channel of communication, where as many as 139 papers out of 194 have been published. The core journals publishing his papers were: Phys. Rev. Leu. (42), Phys. Rev. B (9), J. Low Temp. Phys. (8),Phys. Rev. A (7), Ann. Phys. (6), Foundations of physics (6), J. Phys.(5), Prog. Theor: Phys. (5), and Rev. Mod. Phys. (5).Publication density was 3.02 and publication concentration was 3.59
Dam-breaking seiches
No full textExperimental and theoretical models are used to explore the break of a
moraine dam by catastrophic erosional incision initiated by an
overtopping wave. The experiments are conducted in a rectangular tank
with an erodible barrier made from sand and grit. Theory combines
shallow-water hydrodynamics with an empirical model of erosion. The
models confirm that dams can be broken by a catastrophic incision.
However, the displacement wave does not break the dam in its first
passage but excites a long-lived seiche that repeatedly washes over the
dam. The Cumulative erosion of the downstream face by the overtopping
seiches eventually allows an incipient channel to form, and catastrophic
incision follows. Estimates are presented of the strength of the initial
disturbance required to break the dam, the maximum discharge and the
duration of the runaway incision
A shocking display of synchrony
No full textThis article explores the Kuramoto model describing the synchronization of a population of coupled oscillators. Two versions of this model are considered: a discrete version suitable for a population with a finite number of oscillators, and a continuum model found in the limit of an infinite population. When the strength of the coupling between the oscillators exceeds a threshold, the oscillators partially synchronize. We explore the transition in the continuum model, which takes the form of a bifurcation of a discrete mode from a continuous spectrum. We use numerical methods and perturbation theory to study the patterns of synchronization that form beyond transition, and compare with the synchronization predicted by the discrete model. There are similarities with instabilities in ideal plasmas and inviscid fluids, but these are superficial
Dam breaking by wave-induced erosional incision
No full textWe present an experimental and theoretical study of whether a large
displacement wave can lead to catastrophic erosional incision of a
moraine damming a glacial lake. The laboratory experiments consist of
reservoirs held by barriers of granular materials in a glass tank; the
theoretical model combines the Saint-Venant equations of hydraulic
engineering with an empirical prescription for erosion. The results of
both the laboratory experiments and the numerical simulations indicate
that a single wave is generally unable to break the dam, but a
sufficiently large disturbance in an almost-filled reservoir creates a
seiche that can repeatedly overtop the dam. In such a case, the combined
effect of the multiple erosion events ultimately breaks the dam
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