Results 41 to 50 of about 18,958 (230)

Uncertainty in 2-point correlation function estimators and BAO detection in SDSS DR7

, 2011
We study the uncertainty in different two-point correlation function (2PCF) estimators in currently available galaxy surveys. This is motivated by the active subject of using the baryon acoustic oscillations (BAOs) feature in the correlation function as ...
Abazajian, Antoine Labatie, Blanton, Blanton, Cabre, Coles, Davis, Eisenstein, Eisenstein, Eisenstein, Fioc, Gabrielli, Hamilton, Jean-Luc Starck, Kaiser, Kazin, Kerscher, Kitaura, Landy, Li, Marc Lachièze-Rey, Martínez, Martínez, Pablo Arnalte-Mur, Peebles, Peebles, Percival, Pons-Bordería, Pope, Stoyan, Sylos Labini, Zehavi, Zehavi   +32 more
core   +1 more source

Mapping Cluster Mass Distributions via Gravitational Lensing of Background Galaxies [PDF]

, 1994
We present a new method for measuring the projected mass distributions of galaxy clusters. The gravitational amplification is measured by comparing the joint distribution in redshift and magnitude of galaxies behind the cluster with that of field ...
Broadhurst, T. J., Peacock, J. A., Taylor, A. N.   +2 more
core   +2 more sources

Distribuciones discretas en MDS para datos de disimilaridad generados mediante cuestionarios [PDF]

, 2004
En este trabajo se propone la utilización de distribuciones estadísticas discretas como alternativa a la distribución lognormal para la modelización de datos de disimilaridad provenientes de escalas con pocas modalidades en los modelos confirmatorios ...
González Carmona, Andrés, Muñoz Orellana, Juan Antonio, Pascual Acosta, Antonio, Rufián Lizana, Antonio, Vera Vera, José Fernando   +4 more
core  

Random finite element analysis on ground subsidence caused by tunnel excavation in karst regions with spatial variable soil

Deep Underground Science and Engineering, EarlyView.
This study investigates ground subsidence during tunnel excavation in karst areas, highlighting the combined effects of karst cave proximity, cave size, and soil spatial variability. Findings suggest that shorter cave distances and larger cave sizes increase subsidence variability, and a modified Peck formula is proposed for more accurate subsidence ...
Zhenghong Su, Yong Fu, Miaomiao Sun, Kailin Ding, Ying Zhao   +4 more
wiley   +1 more source

Using observation-level random effects to model overdispersion in count data in ecology and evolution [PDF]

PeerJ, 2014
Overdispersion is common in models of count data in ecology and evolutionary biology, and can occur due to missing covariates, non-independent (aggregated) data, or an excess frequency of zeroes (zero-inflation).
Xavier A. Harrison
doaj   +2 more sources

Scenario Analysis Approach for Operational Risk in Insurance Companies [PDF]

ACTA VŠFS, 2020
The article deals with the possibility of calculating the required capital in insurance companies allocated to operational risk under Solvency II regulation and the aim of this article is to come up with model that can be use in insurance companies for
Vyskočil, Michal
doaj   +1 more source

Developing a macroecology for human‐altered ecosystems

Ecography, EarlyView.
Although anthropogenically‐induced ecological disruptions are fundamentally important in defining ecosystem properties, they are largely overlooked by macroecological theory. Anthropogenic disruptions and their effects are generally not comparable to one another, nor to disturbances that are part of natural disturbance regimes.
Erica A. Newman, Mark Q. Wilber, Alexandre Génin, Oriana E. Chafe, Henry F. Houskeeper, Steven Lee, Eric L. Berlow, John Harte   +7 more
wiley   +1 more source

Evaluation of Modeling Assumptions for Predicting Structural Damage and Train Derailment Under Earthquake Loading

Earthquake Engineering &Structural Dynamics, EarlyView.
ABSTRACT The rapid development of new railway networks and the aging of existing infrastructure in seismic‐prone regions continue to motivate the need for efficient methods to simulate the dynamic behavior of coupled train track structure systems. While detailed train–structure interaction (TSI) models can capture complex mechanisms, they are often too
Miguel A. Gomez, Matthew J. DeJong
wiley   +1 more source

An extensive comparison of species-abundance distribution models [PDF]

PeerJ, 2016
A number of different models have been proposed as descriptions of the species-abundance distribution (SAD). Most evaluations of these models use only one or two models, focus on only a single ecosystem or taxonomic group, or fail to use appropriate ...
Elita Baldridge, David J. Harris, Xiao Xiao, Ethan P. White   +3 more
doaj   +2 more sources

Covariance Structure Modeling of Engineering Demand Parameters in Cloud‐Based Seismic Analysis

Earthquake Engineering &Structural Dynamics, EarlyView.
ABSTRACT Probabilistic seismic demand modeling aims to estimate structural demand as a function of ground motion intensity—a critical stage in seismic risk assessment. Although many models exist to describe the structural demand, few consider the covariance among engineering demand parameters, potentially overlooking a key factor in improving the ...
Archie Rudman, Enrico Tubaldi, Roberto Gentile, John Douglas   +3 more
wiley   +1 more source