Results 21 to 30 of about 75,087 (307)

Correlation Between the Octane Number of Motor Gasoline and Its Boiling Range

open access: yesJournal of King Saud University: Engineering Sciences, 1997
A significant correlation was found between the research octane number of unleaded motor gasoline and its 90% boiling point using a computer-run regression analysis of data from European and Syrian Sources.
Hassan Al-haj Ibrahim, Mourhaf Al-Kassmi
doaj   +1 more source

Ecolabels can improve public perception and farm profits for shellfish aquaculture

open access: yesAquaculture Environment Interactions, 2021
Ecolabels are increasingly being used to notify consumers that the labeled product imposes minimal harm to the environment or other natural resources.
M Gray   +6 more
doaj   +1 more source

Introducing w-Horn and z-Horn: A generalization of Horn and q-Horn formulae

open access: yesAnnales Mathematicae et Informaticae, 2021
Summary: In this paper we generalize the well-known notions of Horn and \(q\)-Horn formulae. A Horn clause, by definition, contains at most one positive literal. A Horn formula contains only Horn clauses. We generalize these notions as follows. A clause is a \(w\)-Horn clause if and only if it contains at least one negative literal or it is a unit or ...
Kusper, Gábor   +3 more
openaire   +3 more sources

Analysis of the Effects and Causes of Driver Horn Use on the Acoustic Environment at Urban Intersections in Taiwan

open access: yesApplied Sciences, 2022
Car horns were originally installed in vehicles for safety. However, many urban areas in several countries face noise problems related to the use of car and motorbike horns. To propose measures to suppress the use of horns, relationships between horn use
Masayuki Takada   +7 more
doaj   +1 more source

Macroanatomical and histological study of the structure of intercornual gland in Abaza (Capra Aegagrus) and Gurcu (Capra Falconeri) goats breeds

open access: yesFolia Morphologica, 2021
BACKGROUND: The anatomical localisation of the odour glands, which increase activity during the reproduction period and help goat species to find each other, varies.
S. Dalga   +3 more
doaj   +1 more source

Modeling the impact of floating oyster (Crassostrea virginica) aquaculture on sediment-water nutrient and oxygen fluxes

open access: yesAquaculture Environment Interactions, 2015
Bivalve aquaculture relies on naturally occurring phytoplankton, zooplankton, and detritus as food sources, thereby avoiding external nutrient inputs that are commonly associated with finfish aquaculture.
JM Testa   +7 more
doaj   +1 more source

Thermal Treatment of Syrian Sponge Coke

open access: yesJournal of King Saud University: Engineering Sciences, 2006
Samples of Syrian sponge coke were thermally treated at high temperatures and increased residence time. A coke of higher quality was thereby obtained, with reduced sulphur content and higher real density.
Hassan Al-Haj Ibrahim
doaj   +1 more source

Hunting and mountain sheep: Do current harvest practices affect horn growth?

open access: yesEvolutionary Applications, 2019
The influence of human harvest on evolution of secondary sexual characteristics has implications for sustainable management of wildlife populations.
Tayler N. LaSharr   +15 more
doaj   +1 more source

Revisiting Horn’s problem [PDF]

open access: yesJournal of Statistical Mechanics: Theory and Experiment, 2019
We review recent progress on Horn's problem, which asks for a description of the possible eigenspectra of the sum of two matrices with known eigenvalues. After revisiting the classical case, we consider several generalizations in which the space of matrices under study carries an action of a compact Lie group, and the goal is to describe an associated ...
Coquereaux, Robert   +2 more
openaire   +4 more sources

Frequencies of genes for coat colour and horns in Nordic cattle breeds

open access: yesGenetics Selection Evolution, 2000
Gene frequencies of coat colour and horn types were assessed in 22 Nordic cattle breeds in a project aimed at establishing genetic profiles of the breeds under study. The coat colour loci yielding information on genetic variation were: extension, agouti,
Lien Sigbjørn   +7 more
doaj   +1 more source

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