Results 11 to 20 of about 58,873 (197)

GASOHOL (E24) EFFECTS ON THE FREE PHASE THICKNESS WITHIN MONITORING WELLS COMPARED TO PURE GASOLINE EFFECTS

open access: yesRevista Águas Subterrâneas, 2006
Free-phase gasoline remedial schemes are based on the gasoline’s thickness layer measured on monitoring wells. The relationship of the thickness within the well and in the aquifer depends on the elevation of the water table.
Everton de Oliveira   +1 more
doaj   +1 more source

Pre-images of quadratic dynamical systems [PDF]

open access: yes, 2010
For a quadratic endomorphism of the affine line defined over the rationals we consider the problem of bounding the number of rational points that eventually land at a given constant after iteration, called pre-images of the constant.
Hutz, Benjamin   +2 more
core   +1 more source

Exact $G_2$-structures on unimodular Lie algebras [PDF]

open access: yes, 2020
We consider seven-dimensional unimodular Lie algebras $\mathfrak{g}$ admitting exact $G_2$-structures, focusing our attention on those with vanishing third Betti number $b_3(\mathfrak{g})$. We discuss some examples, both in the case when $b_2(\mathfrak{g}
Fernández, Marisa   +2 more
core   +2 more sources

Effect of media composition (carbon and nitrogen sources) on the production of bioemulsifier from Serratia marcescens S10

open access: yesمجلة مركز بحوث التقنيات الاحيائية, 2012
he effect of different cultural conditions on production of bioemulsifier from Serratia marcescens S10 was determined; different carbon and nitrogen sources were used such as: different oils include: edible (vegetable) oils (olive oil, sesame oil, sun ...
Entissar Faroun Ahmed   +1 more
doaj   +1 more source

The Cyclicality of Immigrant Wages and Labour Market Flows: Evidence from Spain

open access: yesEconomics: Journal Articles, 2022
This article studies the responses of real wages and labour market flows of immigrants in Spain for the period between 1999 and 2019. By using Labour Force Survey microdata, I examine the cyclicality of job-finding and job-separation rates for immigrants
Gálvez-Iniesta Ismael
doaj   +1 more source

Non-Kaehler Heterotic String Solutions with non-zero fluxes and non-constant dilaton [PDF]

open access: yes, 2014
Conformally compact and complete smooth solutions to the Strominger system with non vanishing flux, non-trivial instanton and non-constant dilaton using the first Pontrjagin form of the (-)-connection} on 6-dimensional non-Kaehler nilmanifold are ...
Fernandez, Marisa   +3 more
core   +3 more sources

Factors and Determinants of the Development of Human Capital in Rural Areas in the Conditions of Global Challenges

open access: yesECONOMICS, 2023
The development of rural areas is a complex and dynamic phenomenon, the effectiveness of which depends on food security and the economic activity of the population.
Demchenko Oleksandr   +4 more
doaj   +1 more source

Ramanujan and coefficients of meromorphic modular forms [PDF]

open access: yes, 2016
The study of Fourier coefficients of meromorphic modular forms dates back to Ramanujan, who, together with Hardy, studied the reciprocal of the weight 6 Eisenstein series. Ramanujan conjectured a number of further identities for other meromorphic modular
Bringmann, Kathrin, Kane, Ben
core   +2 more sources

Classification of Symmetry Lie Algebras of the Canonical Geodesic Equations of Five-Dimensional Solvable Lie Algebras [PDF]

open access: yes, 2019
In this investigation, we present symmetry algebras of the canonical geodesic equations of the indecomposable solvable Lie groups of dimension five, confined to algebras A_{5,7}^{abc} to A_{18}^a.
Almusawa, Hassan   +2 more
core   +2 more sources

Unemployment During the Recent COVID-19 Pandemic: Exploring the Perspective of Fresh Graduates from a Developing Nation

open access: yesEconomics and Business, 2022
The recent COVID-19 pandemic has accelerated the radical changes in economics, labour market and business models globally. The job market is no exception.
Momen Md. Abdul   +3 more
doaj   +1 more source

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