Results 101 to 110 of about 28,598 (226)

A massive star origin for an unusual helium-rich supernova in an elliptical galaxy

open access: yes, 2010
The unusual helium-rich (type Ib) supernova SN 2005E is distinguished from any supernova hitherto observed by its faint and rapidly fading light curve, prominent calcium lines in late-phase spectra and lack of any mark of recent star formation near the ...
Deng, J.   +8 more
core   +1 more source

Euro-dollars, once again: a correction

open access: yesPSL Quarterly Review, 2013
A correction is provided for a statement in the author’s article “Euro-Dollars, Once Again”, published in June 1972, regarding the the multiplication of dollar reserves that occurred when central banks placed them in the Euro-dollar market.
F. MACHLUP
doaj   +1 more source

On the escape of particles from cosmic ray modified shocks

open access: yes, 2009
Stationary solutions to the problem of particle acceleration at shock waves in the non-linear regime, when the dynamical reaction of the accelerated particles on the shock cannot be neglected, are known to show a prominent energy flux escaping from the ...
Amato   +30 more
core   +1 more source

Study on the Preparation and Performance of High-Pressure Sea Water Resistant Epoxy-Modified Polyurethane Urea Elastomer Coating Material [PDF]

open access: yesCailiao Baohu
In order to address the corrosion issues of metallic components in marine engineering,polyurethane urea elastomers were synthesized using polytetrahydrofuran ether diol (PTMG1000), diphenylmethane diisocyanate (MDI) and 4,4'-methylenebis(2-chloroaniline)
QI Xinyu, XIAO Mingming, TIAN Pan, WANG Yang, WU Zhengjiang
doaj   +1 more source

A world-line framework for 1D Topological Conformal sigma-models

open access: yes, 2015
We use world-line methods for pseudo-supersymmetry to construct $sl(2|1)$-invariant actions for the $(2,2,0)$ chiral and ($1,2,1)$ real supermultiplets of the twisted $D$-module representations of the $sl(2|1)$ superalgebra.
Baulieu, L., Holanda, N. L., Toppan, F.
core   +1 more source

Impact of exchange volatility on private- sector credit access in sub-Saharan African

open access: yesBorsa Istanbul Review
This study investigates the impact of exchange rate volatility on private sector credit supply in Sub-Saharan Africa (SSA). Employing a two-step System Generalized Method of Moments (GMM) estimator on an unbalanced panel spanning 2003–2021, the analysis ...
Temesgen Woldamanuel Wajebo   +1 more
doaj   +1 more source

On the endogeneity of the money stock. A comment

open access: yesPSL Quarterly Review, 2014
In this brief note, the author comments on David I. Fand’s “Some Issues in Monetary Economics”, raising several questions on the sharp distinction that Fand draws between the nominal money stock and the real money stock and the criteria used in ...
A. GAMBINO
doaj   +1 more source

Synthesis of hexa (imidazolyl) cyclotriphosphazene and its performance as curing catalyst of epoxy resin

open access: yesCailiao gongcheng, 2019
Hexa (imidazolyl) cyclotriphosphazene (HImCP) was synthesized by nucleophilic substitution reaction of hexachlorocyclotriphosphazene with imidazole. The chemical structure was characterized by FT-IR,1H-NMR, and 31P-NMR.
ZHANG Bo-wen   +6 more
doaj   +1 more source

Circumference of 3-connected cubic graphs

open access: yes, 2017
The circumference of a graph is the length of its longest cycles. Jackson established a conjecture of Bondy by showing that the circumference of a 3-connected cubic graph of order $n$ is $\Omega(n^{0.694})$.
Liu, Qinghai, Yu, Xingxing, Zhang, Zhao
core   +1 more source

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