Results 41 to 50 of about 286,227 (342)

The Effect of Microaggregation Procedures on the Estimation of Linear Models: A Simulation Study [PDF]

, 2005
Microaggregation is a set of procedures that distort empirical data in order to guarantee the factual anonymity of the data. At the same time the information content of data sets should not be reduced too much and should still be useful for scientific ...
Schmid, Matthias, Schneeweiß, Hans
core   +2 more sources

Estimation of Finite Population Mean under Probability-Proportional-to-Size Sampling in the Presence of Extreme Values

International Journal of Mathematics and Mathematical Sciences, 2023
This article developed an estimator for finite population mean under probability-proportional-to-size sampling in the presence of extreme values. Theoretical properties such as bias, variance, and consistency are derived.
Richard Ayinzoya, Dioggban Jakperik
doaj   +1 more source

The unpredictably eruptive dynamics of spruce budworm populations in eastern Canada

Population Ecology, EarlyView.
We examine historical population data for spruce budworm from several locations through the period 1930–1997, and use density‐dependent recruitment curves to test whether the pattern of population growth over time is more consistent with Royama's (1984; Ecological Monographs 54:429–462) linear R(t) model of harmonic oscillation at Green River New ...
Barry J. Cooke, Jacques Régnière
wiley   +1 more source

Parametric Estimation in Fractional Stochastic Differential Equation

Stats
Fractional Stochastic Differential Equations are becoming more popular in the literature as they can model phenomena in financial data that typical Stochastic Differential Equations models cannot.
Paramahansa Pramanik, Edward L. Boone, Ryad A. Ghanam   +2 more
doaj   +1 more source

occumb: An R package for site occupancy modeling of eDNA metabarcoding data

Population Ecology, EarlyView.
This study introduces a new R package, occumb, for the convenient application of site occupancy modeling using environmental DNA (eDNA) metabarcoding data. We outline a data analysis workflow, including data setup, model fitting, model assessment, and comparison of potential study settings based on model predictions, all of which can be performed using
Keiichi Fukaya, Yuta Hasebe
wiley   +1 more source

Statistical framework for estimating GNSS bias [PDF]

Atmospheric Measurement Techniques, 2015
Abstract. We present a statistical framework for estimating global navigation satellite system (GNSS) non-ionospheric differential time delay bias. The biases are estimated by examining differences of measured line integrated electron densities (TEC) that are scaled to equivalent vertical integrated densities.
Juha Vierinen, Anthea J. Coster, William C. Rideout, Philip J. Erickson, Johannes Norberg   +4 more
openaire   +7 more sources

Bias in parametric estimation: reduction and useful side-effects [PDF]

, 2013
The bias of an estimator is defined as the difference of its expected value from the parameter to be estimated, where the expectation is with respect to the model.
Albert, Botter, Breslow, Bull, Bull, Chernick, Cook, Cordeiro, Cordeiro, Cordeiro, Cox, Cox, Davison, Efron, Efron, Efron, Espinheira, Firth, Gourieroux, Gourieroux, Gouriéroux, Grün, Hall, Heinze, Hesterberg, Jeffreys, Jiang, Kosmidis, Kosmidis, Kosmidis, Kuk, Lancaster, Lehmann, McCullagh, Mehrabi, Pace, Peterson, Pfeffermann, Phillips, Prater, Quenouille, Randall, Reid, Schucany   +43 more
core   +3 more sources

KINERJA JACKKNIFE RIDGE REGRESSION DALAM MENGATASI MULTIKOLINEARITAS

E-Jurnal Matematika, 2014
Ordinary least square is a parameter estimations for minimizing residual sum of squares. If the multicollinearity was found in the data, unbias estimator with minimum variance could not be reached.
HANY DEVITA, I KOMANG GDE SUKARSA, I PUTU EKA N. KENCANA   +2 more
doaj   +1 more source

Insights into PI3K/AKT signaling in B cell development and chronic lymphocytic leukemia

FEBS Letters, EarlyView.
This Review explores how the phosphoinositide 3‐kinase and protein kinase B pathway shapes B cell development and drives chronic lymphocytic leukemia, a common blood cancer. It examines how signaling levels affect disease progression, addresses treatment challenges, and introduces novel experimental strategies to improve therapies and patient outcomes.
Maike Buchner
wiley   +1 more source

Social context prevents heat hormetic effects against mutagens during fish development

FEBS Letters, EarlyView.
This study shows that sublethal heat stress protects fish embryos against ultraviolet radiation, a concept known as ‘hormesis’. However, chemical stress transmission between fish embryos negates this protective effect. By providing evidence for the mechanistic molecular basis of heat stress hormesis and interindividual stress communication, this study ...
Lauric Feugere, Claudio Silva De Freitas, Adam Bates, Kenneth B. Storey, Pedro Beltran‐Alvarez, Katharina C. Wollenberg Valero   +5 more
wiley   +1 more source