112,148 research outputs found
Step-initial function to the MKdV equation: Hyper-elliptic long-time asymptotics of the solution
No full textThe modified Korteweg-de Vries equation on the line is considered. The initial function is a discontinuous and piece-wise constant step function, i.e. for and for , where are real numbers which satisfy The goal of this paper is to study the asymptotic behavior of the solution of the initial-value problem as Using the steepest descent method we deform the original oscillatory matrix Riemann-Hilbert problem to explicitly solvable model forms and show that the solution of the initial-value problem has different asymptotic behavior in different regions of the plane. In the regions and the main term of asymptotics of the solution is equal to and , respectively. In the region the asymptotics of the solution takes the form of a modulated hyper-elliptic wave generated by an algebraic curve of genus 2. V. Kotlyarov and A. Minakov, 2012
Riemann-Hilbert problem to the modified Korteveg-de Vries equation: Long-time dynamics of the steplike initial data
No full textRiemann-Hilbert problems and the mKdV equation with step initial data: short-time behavior of solutions and the nonlinear Gibbs-type phenomenon
No full textModulated elliptic wave and asymptotic solitons in a shock problem to the modified Korteweg-de Vries equation
No full textauthor-bios-SRD-19-0063.R1 – Supplemental material for The Network Structure of Police Misconduct
No full textSupplemental material, author-bios-SRD-19-0063.R1 for The Network Structure of Police Misconduct by George Wood, Daria Roithmayr and Andrew V. Papachristos in Socius</p
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Astronomy Letters, V. 26, I. 10
No full textAstronomy Letters -- October 2000
Volume 26, Issue 10, pp. 623-690
RC J0105+0501: A Radio Galaxy with Redshift z [approximate] 3.5
N. S. Soboleva, W. M. Goss, O. V. Verkhodanov, O. P. Zhelenkova, A. V. Temirova, A. I. Kopylov, and Yu. N. Pariiskii
pp. 623-627 Full Text: PDF (101 kB)
Effects of Microlensing on Parameters of the Images Seen near the Critical Curves of Gravitational Lens Galaxies
A. A. Minakov and V. G. Vakulik
pp. 628-638 Full Text: PDF (159 kB)
Cosmic Rays, Radio and Gamma-Ray Emission from the Remnant of Supernova 1987A
E. G. Berezhko and L. T. Ksenofontov
pp. 639-656 Full Text: PDF (237 kB)
The Praesepe Open Cluster and the Galactic Distance Scale
A. V. Loktin
pp. 657-659 Full Text: PDF (41 kB)
Unsteady Mass Outflow from Wolf–Rayet Stars
Kh. F. Khaliullin and A. I. Khaliullina
pp. 660-667 Full Text: PDF (92 kB)
The Orbit of the Nearby Low-Mass Binary Gliese 600
A. A. Tokovinin, Yu. Yu. Balega, K.-H. Hofmann, and G. Weigelt
pp. 668-671 Full Text: PDF (60 kB)
Tests for Spatial Isotropy of Three Thousand Gamma-Ray Bursts Found in BATSE Archival Data
Ya. Yu. Tikhomirova and B. E. Stern
pp. 672-678 Full Text: PDF (97 kB)
The Temperature of Nonspherical Circumstellar Dust Grains
N. V. Voshchinnikov and D. A. Semenov
pp. 679-690 Full Text: PDF (183 kB)Archived web conten
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
Spontaneous imbibition experiments for enhanced oil recovery with silica nanosols
No full textExperimental oil displacement as a result of spontaneous imbibition of silica nanosols has been carried out using two types of sandstone as the reservoir rock. The permeability of the cores ranged from 0.34 to 333 mD, while the porosity was 11% and 22%, respectively. During the research, the influence of the concentration and nanoparticle size, as well as the permeability of the rock, on the process of spontaneous imbibition, was studied. Silica nanosols were considered as an object of study. The nanoparticle size ranged from 10 to 35 nm. The mass concentration of nanoparticles varied from 0.01% to 0.25%. It was found that the use of silica nanosols significantly increases the rate of the spontaneous imbibition process. It was established that a silica nanosol with a nanoparticle size of 10 nm and a concentration of 0.25% allows to displace more than six times oil compared to the reservoir water model in the same time. As a result, it was shown that the oil displacement efficiency and the efficiency of spontaneous imbibition increase along with an increase in the nanoparticle concentration and a decrease in the nanoparticle size.Document Type: Original articleCited as: Pryazhnikov, M. I., Zhigarev, V. A., Minakov, A. V., Nemtsev, I. V. Spontaneous imbibition experiments for enhanced oil recovery with silica nanosols. Capillarity, 2024, 10(3): 73-86. https://doi.org/10.46690/capi.2024.03.0
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