Results 81 to 90 of about 2,125 (287)

A high-resolution gravimetric quasigeoid model for Vietnam

open access: yesEarth, Planets and Space, 2019
A high-resolution gravimetric quasigeoid model for Vietnam and its surrounding areas was determined based on new gravity data. A set of 29,121 land gravity measurements was used in combination with fill-in data where no gravity data existed.
Dinh Toan Vu   +2 more
doaj   +1 more source

A WEIGHTED LEAST SQUARES B-SPLINE COLLOCATION METHOD FOR ELLIPTIC PARTIAL DIFFERENTIAL EQUATIONS

open access: yes, 2020
A new, free-integration approach based upon B-spline for solving boundary value problem is introduced and presented in the paper, called weighted least squares B-spline collocation method.
Yulamda, Infimum D.; Department of Materials and Metallurgical Engineering, Institut Teknologi Sepuluh Nopember   +1 more
core   +1 more source

A Least Squares Radial Basis Function Finite Difference Method with Improved Stability Properties

open access: yes, 2021
Localized collocation methods based on radial basis functions (RBFs) for elliptic problems appear to be nonrobust in the presence of Neumann boundary conditions.
Heryudono, Alfa,   +2 more
core   +1 more source

Closeness and disappointment in Jordanian friendships Proximité et déception en amitié en Jordanie

open access: yesJournal of the Royal Anthropological Institute, EarlyView.
Western folk models of friendship assume that friends like one another, implying mutually positive feelings. However, accounts of friendship from across times and places suggest that disappointment goes along with friendship as often as mutual affection.
Susan MacDougall
wiley   +1 more source

On the interpolation of high-frequency gravity field signals in mountainous areas

open access: yesContributions to Geophysics and Geodesy, 2013
The paper presents a comparison among different techniques in interpolating high-frequency gravity field signals in mountainous areas. A gap of 1◦ ×1◦ has been artificially created within the free-air gravity anomalies data set for Austria.
Hussein A. ABD-ELMOTAAL   +1 more
doaj   +1 more source

Reconstructing Old Chinese *‐ts Using Han‐Time Material

open access: yesTransactions of the Philological Society, EarlyView.
Abstract Baxter & Sagart (2014b) reconstruct *‐Vt‐s on the basis of Middle Chinese reflexes in ‐jH (from some OC *‐s) coupled with either etymological or graphic connections to words in Middle Chinese ‐t. This approach, while perfectly sound, can suffer from lack of etymological or graphic data, leading to missed reconstructions. Since Old Chinese *‐ts
Julien Baley
wiley   +1 more source

Least-Squares Collocation for Higher-Index Linear Differential-Algebraic Equations : Estimating the Instability Threshold

open access: yes, 2019
Differential-algebraic equations with higher-index give rise to essentially ill-posed problems. The overdetermined least-squares collocation for differential-algebraic equations which has been proposed recently is not much more computationally expensive ...
Wurm, S.   +4 more
core   +1 more source

Heterogeneous Spillover Effects: How FDI in Resources Extraction, Manufacturing, and Services Affect Sectoral Carbon Emissions in the MENA Region

open access: yesNatural Resources Forum, EarlyView.
ABSTRACT The MENA region faces a critical challenge: balancing economic growth spurred by foreign direct investment (FDI) with environmental sustainability. While FDI can bring technological advancements and capital, concerns exist about its potential to exacerbate environmental degradation, particularly carbon emissions.
Brahim Bergougui, Syed Mansoob Murshed
wiley   +1 more source

Discrete and Differential Equations in Applied Mathematics

open access: yesCommunications, 2008
In the contribution we map investigations performed in mathematics at the Faculty of Science in 2003-2007. Main directions developed at the faculty are described and some of the latest achievements are presented.
Miroslava Ruzickova
doaj   +1 more source

Mass and momentum conservation of the least-squares spectral collocation method for the Navier–Stokes equations

open access: yes, 2011
From the literature, it is known that the Least-Squares Spectral Element Method (LSSEM) for the stationary Stokes equations performs poorly with respect to mass conservation but compensates this lack by a superior conservation of momentum.
Heinrichs, Wilhelm   +3 more
core   +1 more source

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