Results 1 to 10 of about 799,106 (184)

Methodology for Determining Phthalate Residues by Ultrasound–Vortex-Assisted Dispersive Liquid–Liquid Microextraction and GC-IT/MS in Hot Drink Samples by Vending Machines

Analytica, 2022
In this study, a simple, fast, and effective methodology has been developed for the detection and quantification of seven phthalates potentially released in hot drinks from disposable containers used in vending machines.
Giuseppe Ianiri, Cristina Di Fiore, Sergio Passarella, Ivan Notardonato, Alessia Iannone, Fabiana Carriera, Virgilio Stillittano, Vincenzo De Felice, Mario Vincenzo Russo, Pasquale Avino   +9 more
doaj   +1 more source

The use of pseudoresiduals in the study of convergence of unstable difference boundary value problems for linear nonhomogeneous ordinary second-order differential equations

Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2022
The paper considers the previously proposed method of numerical integration using the matrix calculus in the study of boundary value problems for nonhomogeneous linear ordinary differential equations of the second order with variable coefficients ...
Vladimir N. Maklakov
doaj   +1 more source

Median Polish Kriging and Sequential Gaussian Simulation for the Spatial Analysis of Source Rock Data

Journal of Marine Science and Engineering, 2021
In this technical note, a geostatistical model was applied to explore the spatial distribution of source rock data in terms of total organic carbon weight concentration. The median polish kriging method was used to approximate the “row and column effect”
Emmanouil A. Varouchakis
doaj   +1 more source

Materials for Additive Manufacturing

AIMS Materials Science, 2022
This Special Issue of AIMS Materials Science was devoted to the topic "Materials for Additive Manufacturing". It attracted significant attention from scholars and practitioners from ten different countries (Spain, Greece, France, Portugal, Italy, Finland,
John D. Kechagias
doaj   +1 more source

Enhancing the Iterative Smoothed Particle Hydrodynamics Method

Applied Sciences, 2021
Motivated by recent research on the iterative approach proposed for the smoothed particle hydrodynamics (ISPH) method, some ideas to improve the process are introduced.
Elisa Francomano
doaj   +1 more source

YHTD’lerin Değerlendirilmesinde Yeni Bir Yöntem

Düzce Üniversitesi Bilim ve Teknoloji Dergisi, 2021
Yer hareketi tahmin denklemlerinin sayılarının günden güne artması (YHTD), geliştirme aşamasında kullanılan verilerin artması ve buna paralel olarak denklemlerin daha karmaşık hale gelmesi, kullanıcılar açısından kolaylık değil daha çok külfet ...
Hakan Karaca
doaj   +1 more source

Residuals and goodness-of-fit tests for stationary marked Gibbs point processes [PDF]

, 2010
The inspection of residuals is a fundamental step to investigate the quality of adjustment of a parametric model to data. For spatial point processes, the concept of residuals has been recently proposed by Baddeley et al.
Andersen, Atkinson, Baddeley, Baddeley, Baddeley, Baddeley, Baddeley, Bertin, Billiot, Bolthausen, Coeurjolly, Coeurjolly, Comets, Daley, Dereudre, Dereudre, Diggle, Diggle, Fleming, Georgii, Guan, Illian, Jensen, Jensen, Møller, Møller, Møller, Møller, Nguyen, Nguyen, Preston, Ruelle, Stoyan, Stoyan   +33 more
core   +7 more sources

How to Analyze the Association between Two Categorical Variables Based on Census Data with a High Level of Nonresponse

Scientific Annals of Economics and Business, 2023
Statistical surveys are often used in shaping managerial policy and practice. In this paper we study, how to analyze the association between two categorical variables based on census data with a high level of nonresponse.
Milan Terek, Eva Muchová, Peter Leško
doaj   +1 more source

HANDLING HETEROSCEDASTICITY IN LINEAR MODELS: HUBER-WHITE STANDARD ERRORS VS BOOTSTRAP CONFIDENCE INTERVALS [PDF]

Zbornik Radova Ekonomskog Fakulteta u Istočnom Sarajevu
Heteroscedasticity are one of the several violations of the assumptions of OLS. If no remedy applied, residuals with non-constant variance can lead to inaccurate and biased results.
Zarrukh Rakhimov
doaj   +1 more source

Analysis of GRACE range-rate residuals with focus on KBR instrument system noise [PDF]

, 2018
We investigate the post-fit range-rate residuals after the gravity field parameter estimation from the inter-satellite ranging data of the gravity recovery and climate experiment (GRACE) satellite mission.
Devaraju, Balaji, Goswami, Sujata, Mayer-Gürr, Torsten, Weigelt, Matthias   +3 more
core   +3 more sources