Results 31 to 40 of about 7,285,451 (331)

The PH/PH/1 Multi-threshold Queue [PDF]

open access: yes, 2014
We consider a PH/PH/1 queue in which a threshold policy determines the stage of the system. The arrival and service processes follow a Phase-Type (PH) distribution depending on the stage of the system. Each stage has both a lower and an upper threshold at which the stage of the system changes, and a new stage is chosen according to a prescribed ...
Niek Baer   +2 more
openaire   +4 more sources

MODELING OF THE OPTIMAL STRUCTURE OF MEAT PROCESSING ENTERPRISES

open access: yesФінансово-кредитна діяльність: проблеми теорії та практики, 2021
In today’s economic conditions, problems of functioning of domestic enterprises are not limited by lack of sources of financing of assets, but also often associated with inefficient investment in specific components of property, which adversely affects ...
N. O. Kovalchuk   +3 more
doaj   +1 more source

The A. Ph. A. membership [PDF]

open access: yesThe Journal of the American Pharmaceutical Association (1912), 1917
n ...
openaire   +3 more sources

Tangential Large Scale Structure as a Standard Ruler: Curvature Parameters from Quasars [PDF]

open access: yes, 2000
Several observational analyses suggest that matter is spatially structured at $\approx 130h^{-1}Mpc$ at low redshifts. This peak in the power spectrum provides a standard ruler in comoving space which can be used to compare the local geometry at high and
Mamon, Gary A., Roukema, Boudewijn F.
core   +3 more sources

Physical conditions in broad and associated narrow absorption-line systems toward APM 08279+5255 [PDF]

open access: yes, 2000
Results of a careful analysis of the absorption systems with zabs = zem seen toward the bright, z_em ~ 3.91, gravitationally lensed quasar APM 08279+5255 are presented.
Petitjean, P., Srianand, R.
core   +3 more sources

occumb: An R package for site occupancy modeling of eDNA metabarcoding data

open access: yesPopulation Ecology, EarlyView.
This study introduces a new R package, occumb, for the convenient application of site occupancy modeling using environmental DNA (eDNA) metabarcoding data. We outline a data analysis workflow, including data setup, model fitting, model assessment, and comparison of potential study settings based on model predictions, all of which can be performed using
Keiichi Fukaya, Yuta Hasebe
wiley   +1 more source

Insights into PI3K/AKT signaling in B cell development and chronic lymphocytic leukemia

open access: yesFEBS Letters, EarlyView.
This Review explores how the phosphoinositide 3‐kinase and protein kinase B pathway shapes B cell development and drives chronic lymphocytic leukemia, a common blood cancer. It examines how signaling levels affect disease progression, addresses treatment challenges, and introduces novel experimental strategies to improve therapies and patient outcomes.
Maike Buchner
wiley   +1 more source

Fachspezifische Qualitätsprofile von Rechtschreibunterricht in Deutschland und der Schweiz

open access: yesSchweizerische Zeitschrift für Bildungswissenschaften, 2023
Im Rahmen der ländervergleichenden Studie „Professionelle Kompetenzen und Unterrichtshandeln von Primarlehrpersonen im Lernbereich Rechtschreibung“ wurden 43 Rechtschreiblektionen zur Doppelkonsonantenschreibung in den Klassen 3 bis 6 videografiert und ...
Maja Wiprächtiger   +4 more
doaj   +1 more source

pH Game [PDF]

open access: yes, 2003
The purpose of this resource is to teach students about the acidity levels of liquids and other substances around their school so they understand what pH levels tell us about the environment.
The GLOBE Program, UCAR (University Corporation for Atmospheric Research)
core  

FIRST PASSAGE TIMES OF PH/PH/1/K AND PH/PH/1 QUEUES

open access: yesJournal of the Operations Research Society of Japan, 1987
The single-server phase type queues with finite as well as infinite capacity are considered. The Laplace transforms for some first passage times probability density functions (for example, busy period, inter- overflow time) are established. It is proved that dimensions of the inverse matrices do not exceed the maximum from the number of arrival or ...
openaire   +4 more sources

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