75,213 research outputs found
The Benefits of Being Economics Professor A (and not Z)
No full textAlphabetic name ordering on multi-authored academic papers, which is the convention in the economics discipline and various other disciplines, is to the advantage of people whose last name initials are placed early in the alphabet. As it turns out, Professor A, who has been a first author more often than Professor Z, will have published more articles and experienced afaster growth rate over the course of her career as a result of reputation and visibility. Moreover, authors know that name ordering matters and indeed take ordering seriously: Several characteristics of an author group composition determine the decision to deviate from the default alphabetic name order to a significant extent.performance measurement, incentives, economists, name ordering
Final word on Jersey Dutch
No full textIn this article, William Z. Shetter compares and contrasts the dialects that developed between different Dutch colonies in the New World. He explores in-depth the nuances of Jersey Dutch, and provides theories to explain how Dutch and colonial languages blended. The article is reprinted from American Speech, December 1958, Volum XXXIII, No. 4
Charitable work of rev. Karol Lubianiec (1866-1942)
No full textPierwotny tytuł czasopisma: Przegląd Historyczno-Oświatowy. Od R. 58, nr 1/2 (2015) tytuł równoległy w języku angielskim: The Journal of History and EducationThe article (on the basis of the unpublished archival documents) presents the figure of rev. Karol Lubianiec, a great philanthropist, a teacher and a social activist. At the beginning of the 20th century he created the biggest network of care and educational institutions working in the Vilnius Region. They provided the youth and children with both open and secret schooling. The educational institutions managed by rev. Lubianiec in the 1920’s were handed over to the Salesian Communities and the Grey Ursulines, and they were expanding dynamically till the outbreak of World War II. Rev. Lubianiec also worked as a lecturer in the seminary, a builder of the churches, a missionary on the Borderlands as well as a propagator of the temperance movement. Rev. Karol Lubianiec was killed by the Germans in 1942.The project was financed from the means of National Science Centre granted on the basis of the decision No. DEC–2012/05/N/HS6/[email protected] w BiałymstokuArchiwum Inspektorialne Córek Maryi Wspomożycielki we Wrocławiu, D I Wln 15–39.Archiwum Inspektorialne Córek Maryi Wspomożycielki we Wrocławiu, D I Wln 15–39.Archiwum Inspektorialne Córek Maryi Wspomożycielki we Wrocławiu, D I Wln 22.Archiwum Inspektorialne Córek Maryi Wspomożycielki we Wrocławiu, D I Wln 27.Archiwum Państwowe w Łodzi, ref. 2640, Historia Instytucji wychowawczo-zawodowej pod nazwą „Dom Serca Jezusowego” w Wilnie.Lietuvos Centrinis Valstybės Archyvas, [Lithuanian Central State Archives], f. 51, ap. 12, b. 927Lietuvos Centrinis Valstybės Archyvas, [Lithuanian Central State Archives], f. 53 ap. 23, b. 1846.Lietuvos Mokslų Akademijos Vrublevskių Biblioteka, [The Wroblewski Library of the Lithuanian Academy of Sciences], f. 318–32592.Lietuvos Mokslų Akademijos Vrublevskių Biblioteka, [The Wroblewski Library of the Lithuanian Academy of Sciences], f. 318–36896.Lietuvos Mokslų Akademijos Vrublevskių Biblioteka, [The Wroblewski Library of the Lithuanian Academy of Sciences], f. 318–37745.Lietuvos Mokslų Akademijos Vrublevskių Biblioteka, [The Wroblewski Library of the Lithuanian Academy of Sciences], f. 318–38038.Lietuvos Mokslų Akademijos Vrublevskių Biblioteka, [The Wroblewski Library of the Lithuanian Academy of Sciences], f. 318–38444.Lietuvos Mokslų Akademijos Vrublevskių Biblioteka, [The Wroblewski Library of the Lithuanian Academy of Sciences], f. 342–28739.Lietuvos Mokslų Akademijos Vrublevskių Biblioteka, [The Wroblewski Library of the Lithuanian Academy of Sciences], f. 44–811.Lietuvos Valstybės Istorijos Archyvas, [Lithuanian State Historical Archives, f. 604, ap. 1, b. 6473.Historia powstania i rozwoju zakładów „Powściągliwość i Praca” w Wilnie, no place or year of publication.Krahel T., Archidiecezja wileńska w latach II wojny światowej. Studia i szkice, Białystok, Instytut Pamięci Narodowej, 2014.Krahel T., Martyrologia duchowieństwa archidiecezji wileńskiej 1939–1945, Białystok, Wydawnictwo BUK, 2017.Kustra C., Działalność edukacyjna Towarzystwa „Powściągliwość i Praca” w latach 1898–1949, Olsztyn, Wydawnictwo Wyższej Szkoły Informatyki i Ekonomii Towarzystwa Wiedzy Powszechnej, 2005.Paszkiewicz M., Ks. Karol Lubianiec 1866–1942, Białystok, Wydawnictwo Kurii Arcybiskupiej w Białymstoku, 1983.Wilk S., Episkopat Kościoła katolickiego w Polsce w latach 1918–1939, Warszawa, Wydawnictwo Salezjańskie, 1992.Kalendarz Ilustrowany „Kurjera Litewskiego” na rok, Vilnus, published by ”Kurjer Litewski”.Krahel T., Ks. prałat Karol Lubianiec, „Czas Miłosierdzia” 2000, No. 8.Lewicki D., Świadek wiary katolickiej, „Nasza Gazeta” 2018, No. 8.Nawrocki S., Betanja, „Wiadomości Archidiecezjalne Wileńskie” 1928, No. 11.Paczkowska C., Na 60-lecie męczeńskiej śmierci ks. prałata Karola Lubiańca (1866–1942). Świadectwo Prawdzie dawane życiem i śmiercią, „Magazyn Wileński” 2002, No. 10.Praca filantropijna na kresach. Zakłady wychowawcze Towarzystwa Dobroczynnego p.n. „Domu Serca Jezusowego”. (Z powodu 15 letniej rocznicy istnienia), „Kresy” 1923, No. 17.W kuźni pracy polskiej, „Kurier Poznański” 1938, No. 463.3-421722
Logarithmic variance profiles and the corresponding f-1 spectra of temperature fluctuations in turbulent Rayleigh-Bénard convection
No full textWe report experimental results for the temperature variance 2(z) and the corresponding frequency spectra P(f) in turbulent Rayleigh-Bénard convection (RBC) in a cylindrical sample of aspect ratioT= D/L = 1:00 (D = 1:12 m is the diameter and L = 1:12 m the height). The measurements were conducted in the Rayleigh-number range 1011 < Ra < 1:35 1014 and Pr ' 0:8. For Ra = 1:35x1014, 2(z) could be described well by a logarithmic dependence on the vertical position z in a range of z 1 < z < z 2 with z 1 ' 70 and z 2 = 0:1L. Here L=(2Nu) is the thickness of a thin thermal sublayer adjacent to the horizontal plate where the heat flux (denoted by the Nusselt number Nu) is carried mostly by thermal diffusion. In the log layer, we found that the temperature spectra had a significant frequency range over which P(f) f with close to 1. As Ra decreased, increased so that the log layer became thinner. At Ra = 2:05 1011, z 2 < z 1 and therefore there was no range for a log layer. Correspondingly, the temperature spectrum near the horizontal plate did not have the f1 scaling form either
Statistics of the subgrid scales after the shock-turbulence interaction
No full textThe interaction of a normal shock with isotropic turbulence (IT) represents a basic problem for studying some of the phenomena associated with high speed flows, such as hypersonic flight, supersonic combustion and Inertial Confinement Fusion (ICF). In general, in practical applications, the shock width is much smaller than the turbulence scales and the upstream turbulent Mach number is modest. In this case, recent high resolution shock-resolved Direct Numerical Simulations (DNS) (Ryu and Livescu, J. Fluid Mech., 756, R1, 2014) show that the interaction can be described by the Linear Interaction Approximation (LIA). By using LIA to alleviate the need to solve the shock, DNS post-shock data can be generated at much higher Reynolds numbers than previously possible. Here, such results with Taylor Reynolds number around are used to investigate the properties of the subgrid scales (SGS). In particular, it is shown that the shock interaction decreases the asymmetry of the SGS dissipation PDF as the shock Mach number increases, with a significant enhancement in size of the regions and magnitude of backscatter
Transition to turbulence in a qblique shock-wave/boundary-layer interaction at M=15
No full textDirect numerical simulations are carried out for different forcing techniques to trigger transition during the interaction between an oblique shock-wave and a laminar boundary-layer at M = 1.5. Three forcing methods are used: a) forcing of oblique unstable modes, whose shape and behaviour are determined by the local linear stability theory, b) broadband free-stream acoustic disturbances, and c) a cold plasma flow control device. While the oblique-mode breakdown is dominant for low-amplitude forcing, long streaky structures drive the transition process in a high-amplitude disturbance environment. LES are also performed on the experimental setup by the Institute of Theoretical and Applied Mechanics (ITAM) from Novosibirsk State University with cold plasma actuation. As well as the disturbance type, the effect of Reynolds number and forcing amplitude will be investigated
Triangular Constellations in Flows
No full textParticles advected on the surface of a fluid can exhibit fractal clustering. The local structure of a fractal set is described by its dimension , which is the exponent of a power-law relating the mass in a ball to its radius : . It is desirable to characterise the {\em shapes} of constellations of points sampling a fractal measure, as well as their masses. The simplest example is the distribution of shapes of triangles formed by triplets of points, which we investigate for fractals generated by chaotic dynamical systems. The most significant parameter describing the triangle shape is the ratio of its area to the radius of gyration squared. We show that the probability density of has a phase transition: is independent of and approximately uniform below a critical flow compressibility , which we estimate. For the distribution appears to be described by two power laws: when , and when
Preferential concentration of particles in compressible turbulence
No full textThe behavior of particles in compressible turbulence has been seldom investigated to date despite its importance in many natural and industrial flows. Direct numerical simulations of particle-laden compressible isotropic turbulence are performed to study the preferential concentration of particles and the underling mechanisms. It turns out that heavy particles tend to concentrate in regions of low enstrophy and high fluid density (i.e, strain regions between vortex rings), especially the particles of Kolmogorov scale, which show the largest number density. Due to the compressibility, fluid particles do not distribute uniformly as in incompressible case, but show a tendency to bunch up in high density zones. The preliminary result might give some insights into compressible turbulent transport, dispersion and mixing as well as the subgrid-scale modeling for large-eddy simulation of particle-laden compressible flows
Turbulent structures in unsteady wall-bounded flow subject to temporal acceleration
No full textDirect numerical simulations (DNS) of a transient turbulent channel flow subject to constant temporal acceleration have been performed with a final Reynolds number of \Retau=800. The response of turbulent structures to the temporal acceleration is investigated. A significant delay in the response of turbulent flow is observed in various turbulent properties. It is found that the response of turbulent flow to temporal acceleration consists of two stages: the destruction of the initial \emph{old} turbulence, followed by the generation of \emph{new} turbulence associated with a higher number. The \emph{new} turbulence is much stronger than the \emph{old} turbulence
Incorporation of acceleration effects into the one-dimensional-turbulence model, with application to turbulent combustion and shock-turbulence interactions
No full textOne-dimensional turbulence (ODT) is a stochastic simulation in which 3D turbulence effects are captured on a notional 1D line of sight by introducing instantaneous spatial re-arrangements (maps) that represent advection by notional turbulent eddies. These eddy events incorporate the possibility of kinetic-energy changes that are equal and opposite to changes of other forms of energy such as the gravitational potential energy change due to a re-arrangement of a vertical density profile. This illustrates that motion aligned with an applied force, in this case gravitation , can be associated with energy change. Using this principle, we 1) present a model of turbulence interaction with the dilatational acceleration caused by thermal expansion in flames and show results for a turbulent counterflow flame with comparison to DNS and 2) present a model for shock-induced turbulence and show results for mixing width growth in a shock tube with comparison to experiments
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