Results 31 to 40 of about 6,788,504 (325)

Effective area calculation of pressure balances by means of dimensional measurements method

open access: yesMeasurement: Sensors, 2021
In this study, a piston-cylinder unit that has 980 mm2 effective area was calibrated by means of the dimensional measurement method. In addition, the cross-floating experiment was conducted to determine the effective area of the same piston-cylinder unit,
A. Türk, M. Aksulu, İ. Meral
doaj   +1 more source

Attractiveness of Central Public Spaces in Small Polish Towns Based on a Spatial Order Analysis

open access: yesLand, 2021
The purpose of this article is to evaluate the attractiveness of centrally located public spaces (main squares) in select new small towns in Poland. The evaluation was conducted from the spatial order perspective.
Wioletta Kamińska, Mirosław Mularczyk
doaj   +1 more source

Least Squares Bias in Time Series with Moderate Deviations from a Unit Root

open access: yesJournal of Time Series Analysis, 2018
This articles derives the approximate bias of the least squares estimator of the autoregressive coefficient in discrete autoregressive time series where the autoregressive coefficient is given by αT=1+c/kT, with kT being a deterministic sequence ...
Marian Z. Stoykov
semanticscholar   +1 more source

Residuals-based tests for cointegration with generalized least-squares detrended data [PDF]

open access: yes, 2016
We provide generalized least-squares (GLS) detrended versions of single-equation static regression or residuals-based tests for testing whether or not non-stationary time series are cointegrated.
Perron, Pierre, Rodriguez, Gabriel
core   +1 more source

5-Cyclohexyl-3-cyclohexylsulfonyl-2-methyl-1-benzofuran

open access: yesActa Crystallographica Section E, 2011
In the title compound, C21H28O3S, the benzofuran unit is essentially planar, with a mean deviation of 0.016 (1) Å from the least-squares plane defined by the nine constituent atoms.
Hong Dae Choi   +3 more
doaj   +1 more source

Positive and generalized positive real lemma for slice hyperholomorphic functions [PDF]

open access: yes, 2018
In this paper we prove a quaternionic positive real lemma as well as its generalized version, in case the associated kernel has negative squares for slice hyperholomorphic functions.
Alpay, D.   +3 more
core   +3 more sources

Is stock market development a spur to poverty reduction? Empirical evidence from selected sub-Saharan African countries

open access: yesDevelopment Studies Research, 2023
In this study, the relationship between stock market development and poverty reduction is examined in sub-Saharan African countries during the period 1993–2019.
Nicholas M. Odhiambo
doaj   +1 more source

[3-Benzoyl-2,4-bis(3-nitrophenyl)cyclobutyl](phenyl)methanone

open access: yesActa Crystallographica Section E, 2012
The asymmetric unit of the title compound, C30H22N2O6, comprises a half-molecule of the cyclobutane derivative. The least-squares planes defined by the respective C atoms of the aromatic substituents intersect at angles of 76.81 (7) and 89.22 ...
Prakash S. Nayak   +5 more
doaj   +1 more source

The effective conductivity of arrays of squares: Large random unit cells and extreme contrast ratios [PDF]

open access: yesJournal of Computational Physics, 2011
An integral equation based scheme is presented for the fast and accurate computation of effective conductivities of two-component checkerboard-like composites with complicated unit cells at very high contrast ratios.
J. Helsing
semanticscholar   +1 more source

2,2′-(Propane-2,2-diyl)dibenzothiazole

open access: yesActa Crystallographica Section E, 2010
The two symmetry-independent molecules in the asymmetric unit of the title compound, C17H14N2S2, have similar geometry; the dihedral angles between the least-squares planes of the benzothiazole groups in the two molecules are 83.93 (3) and 81 ...
David R. Tyler   +2 more
doaj   +1 more source

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