Results 21 to 30 of about 119,339 (216)

Comparison of Estimation Procedures for Multilevel AR(1) Models

Frontiers in Psychology, 2016
To estimate a time series model for multiple individuals, a multilevel model may be used.In this paper we compare two estimation methods for the autocorrelation in Multilevel AR(1) models, namely Maximum Likelihood Estimation (MLE) and Bayesian Markov ...
Tanja eKrone, Casper J. Albers, Marieke eTimmerman   +2 more
doaj   +1 more source

Simulating the Cost of Cooperation: A Recipe for Collaborative Problem-Solving

Future Internet, 2018
Collective problem-solving and decision-making, along with other forms of collaboration online, are central phenomena within ICT. There had been several attempts to create a system able to go beyond the passive accumulation of data.
Andrea Guazzini, Mirko Duradoni, Alessandro Lazzeri, Giorgio Gronchi   +3 more
doaj   +1 more source

Time-Efficient Simulation of Free-Space Optical Communication Systems Under Atmospheric Turbulence, Pointing Error, and Angle-of-Arrival Fluctuations

IEEE Photonics Journal, 2023
Computer simulation is a powerful and convenient tool for the design and performance evaluation of free-space optical (FSO) communication systems. In this article, we present two simulation frameworks that incorporate not only the effects of atmospheric ...
Mat T. Nguyen, Vuong Mai, Hoon Kim
doaj   +1 more source

On Flow Characteristics and Interpretative Methods of Oil-Water Two-Phase Flow in Slightly Negative Angle Deviated Pipes

Cejing jishu, 2023
The difference of flow characteristics makes the conventional production logging interpretation model unable to accurately predict the true flowrate of each phase in horizontal wells.
QIN Hao, ZHANG Haining, DUAN Chaowei, LIU Chunlei, TANG Jin, LI Fan, WANG Hang   +6 more
doaj   +1 more source

A comprehensive evaluation of collapsing methods using simulated and real data: Excellent annotation of functionality and largesample sizes required

Frontiers in Genetics, 2014
The advent of next generation sequencing (NGS) technologies enabled the investigation ofthe rare variant-common disease hypothesis in unrelated individuals, even on the genome-widelevel.
Carmen eDering, Inke R König, Laura B Ramsey, Mary V Relling, Wenjian eYang, Andreas eZiegler, Andreas eZiegler   +6 more
doaj   +1 more source

The Lasso and the Factor Zoo-Predicting Expected Returns in the Cross-Section

Forecasting, 2022
We investigate whether Lasso-type linear methods are able to improve the predictive accuracy of OLS in selecting relevant firm characteristics for forecasting the future cross-section of stock returns.
Marcial Messmer, Francesco Audrino
doaj   +1 more source

From Development to Validation: Exploring the Efficiency of Numetrive, a Computerized Adaptive Assessment of Numerical Reasoning

Behavioral Sciences
The goal of the present study is to describe the methods used to assess the effectiveness and psychometric properties of Numetrive, a newly developed computerized adaptive testing system that measures numerical reasoning.
Marianna Karagianni, Ioannis Tsaousis
doaj   +1 more source

Bias in nutrition-health associations is not eliminated by excluding extreme reporters in empirical or simulation studies

eLife, 2023
Self-reported nutrition intake (NI) data are prone to reporting bias that may induce bias in estimands in nutrition studies; however, they are used anyway due to high feasibility. We examined whether applying Goldberg cutoffs to remove ‘implausible’ self-
Nao Yamamoto, Keisuke Ejima, Roger S Zoh, Andrew W Brown   +3 more
doaj   +1 more source

Guidelines for Pediatric Radiotherapy Simulation: A Report From the Children's Oncology Group Radiation Oncology Discipline

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Pediatric radiation therapy presents unique challenges compared to adult treatments, including those of immobilization, potential need for sedation, and the critical importance of accurate, reproducible positioning. Additionally, heightened attention to imaging doses is necessary to minimize long‐term toxicity in survivors.
Parham Alaei, Stephen Mihalcik, Sujith Baliga, Young Kwok, Dana Casey, Eric Ehler, Christiane Burton, John C. Breneman, Daphne A. Haas‐Kogan, Suzanne L. Wolden, Arnold C. Paulino, Nadia N. Laack, Natia Esiashvili, Sarah Milgrom, Christine Hill‐Kayser, Thomas J. Fitzgerald, John A. Kalapurakal, Chia‐Ho Hua   +17 more
wiley   +1 more source

Chiral active systems near a substrate: Emergent damping length controlled by fluid friction

Communications Physics
Chiral active fluids show the emergence of a turbulent behaviour characterised by multiple dynamic vortices whose maximum size varies for each experimental system, depending on conditions not yet identified.
Joscha Mecke, Yongxiang Gao, Gerhard Gompper, Marisol Ripoll   +3 more
doaj   +1 more source