Results 21 to 30 of about 587,609 (221)

College Adaptation Among Colombian Freshmen Students: Internal Structure of the Student Adaptation to College Questionnaire (SACQ)

open access: yesJournal of New Approaches in Educational Research, 2021
The aim of this research is to assess the internal structure and reliability of the Student Adaptation to College Questionnaire (SACQ) in a sample comprising 739 students (64% of them women), attending second-half classes at a private university in the ...
Marbel Lucia Gravini Donado   +2 more
doaj   +1 more source

Heavy Metal Tolerance of Microorganisms Isolated from Coastal Marine Sediments and Their Lead Removal Potential

open access: yesMicroorganisms, 2023
In this study, 338 microorganisms, comprising 271 bacteria and 67 fungi, were isolated from sediment samples collected from underexplored Pacific and Caribbean regions of Colombia.
Katleen L. Alvarado-Campo   +8 more
doaj   +1 more source

Proposal of a Validation Method for Automated Nucleic Acid Extraction and RT -qPCR Analysis: an Example with Bluetongue Virus

open access: yesRevue d’Elevage et de Médecine Vétérinaire des Pays Tropicaux, 2009
Resumen en inglès, ver archivo ...
K. De Clerq   +2 more
doaj   +1 more source

Bayesian nonparametric sparse VAR models [PDF]

open access: yesJournal of Econometrics, 2016
High dimensional vector autoregressive (VAR) models require a large number of parameters to be estimated and may suffer of inferential problems. We propose a new Bayesian nonparametric (BNP) Lasso prior (BNP-Lasso) for high-dimensional VAR models that ...
Monica Billio, R. Casarin, Luca Rossini
semanticscholar   +1 more source

Carbonatation and Decarbonatation Kinetics in the La2O3-La2O2CO3 System under CO2 Gas Flows

open access: yesAdvances in Materials Science and Engineering, 2010
The carbonatation of La2O3 oxide and the decarbonatation of lanthanum carbonate phase La2O2CO3 are investigated using thermal and thermogravimetry analyses under CO2 gas flow.
Bahcine Bakiz   +6 more
doaj   +1 more source

Handling missing data in multivariate time series using a vector autoregressive model-imputation (VAR-IM) algorithm

open access: yesNeurocomputing, 2018
Imputing missing data from a multivariate time series dataset remains a challenging problem. There is an abundance of research on using various techniques to impute missing, biased, or corrupted values to a dataset.
Faraj A. A. Bashir, Hua-Liang Wei
semanticscholar   +1 more source

Life in deep subsurface

open access: yesE3S Web of Conferences, 2016
Life extends far deeper into the Earth's subsurface than presumed possible 30 years ago. In the past, it was assumed that life is a surface phenomenon, and that even “hardy prokaryotic types” are not capable of living deeper than tens of meters below the
Galès Grégoire, Erauso Gaël
doaj   +1 more source

Mean-VaR portfolio optimization: A nonparametric approach

open access: yesEuropean Journal of Operational Research, 2017
Portfolio optimization involves the optimal assignment of limited capital to different available financial assets to achieve a reasonable trade-off between profit and risk.
Khin Lwin, Rong Qu, B. MacCarthy
semanticscholar   +1 more source

Bionics Solution to Learn the Arm Reaching with Collision Avoidance

open access: yesApplied Bionics and Biomechanics, 2005
This article presents a learning model that simulates the control of an anthropomorphic arm kinematics motion. The objective is to reach and grasp a static prototypic object placed behind different kinds of obstacle in size and position.
P. Gorce, P. Bendahan
doaj   +1 more source

THE MACROECONOMIC EFFECTS OF THE SUPER CYCLE OF RAW MATERIALS AND THE INFLUENCE OF CHINA IN THE BRAZILIAN ECONOMY

open access: yesRevista Tempo do Mundo, 2021
At the beginning of the 21st century, with an unprecedented increase in the prices of basic commodities exportable in Latin America, the role of China’s demand has increased in the interest of economic literature, since the end of this so-called “super ...
Juliana Carvalho Brandão   +1 more
doaj   +1 more source

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