Results 61 to 70 of about 4,545 (215)

Morphological and molecular evidence reveals a new species of Characidium from the Ucayali‐Urubamba Piedmont, Peru, and novel molecular clades are proposed within the genus

Journal of Fish Biology, EarlyView.
Abstract A new species of Characidium is described from the Urubamba River basin, within the Ucayali‐Urubamba Piedmont ecoregion, Peru. The new species can be readily distinguished from all congeners, except Characidium cacah, Characidium chicoi, Characidium helmeri, Characidium mirim, Characidium nana, Characidium nupelia, Characidium sterbai ...
Leonardo Oliveira‐Silva, Ricardo Britzke, Vanessa Meza‐Vargas, Max H. Hidalgo, Dario Faustino‐Fuster, Claudio Oliveira, Angela Maria Zanata   +6 more
wiley   +1 more source

Application of Copula Models in Stock Market Analysis

Informatika
Objectives. The objective of the study is to use copula models to analyze shares of the Russian stock market and describe changes in the relationship between the shares before and during the coronavirus infection (COVID-19).Methods.
A. M. Kendys, M. M. Troush
doaj   +1 more source

Attitudes Towards Sexuality and Sexual Orientation in People With Intellectual Disabilities: A Systematic Review

Journal of Intellectual Disability Research, EarlyView.
ABSTRACT Over time, sexuality has become a crucial aspect in people's lives, regardless of physical, intellectual or social conditions, ranging from sex and sexually transmitted diseases to gender identity and sexual orientation. The aim of this study was to carry out a review of the scientific literature on sexual orientation in people with ...
Laura Armas Junco, Juan Antonio Posada Corrales, Laura Alonso Martínez   +2 more
wiley   +1 more source

A Stochastic Approach to Noise Modeling for Barometric Altimeters

Sensors, 2013
The question whether barometric altimeters can be applied to accurately track human motions is still debated, since their measurement performance are rather poor due to either coarse resolution or drifting behavior problems.
Angelo Maria Sabatini, Vincenzo Genovese
doaj   +1 more source

Leadership and the Virtue of Humanity: Conceptual Clarity, Systematic Review, and Future Research Agenda

Journal of Management Studies, EarlyView.
Abstract Humanity – the virtue enabling meaningful human connection – is vital to the leadership we need to survive our polycrisis context. As a prerequisite to sustainable human community, the virtue of humanity is considered universal. It has been claimed as a ‘higher‐order virtue’, comprised of and enacted by – but irreducible to – a suite of ‘lower‐
Toby Newstead, Saeed Loghman, Alexander Newman, Ronald Riggio   +3 more
wiley   +1 more source

Multiple Changepoint Detection for Non‐Gaussian Time Series

Journal of Time Series Analysis, EarlyView.
ABSTRACT This article combines methods from existing techniques to identify multiple changepoints in non‐Gaussian autocorrelated time series. A transformation is used to convert a Gaussian series into a non‐Gaussian series, enabling penalized likelihood methods to handle non‐Gaussian scenarios.
Robert Lund, Thomas J. Fisher, Norou Diawara, Michael Wehner   +3 more
wiley   +1 more source

Automated Bandwidth Selection for Inference in Linear Models With Time‐Varying Coefficients

Journal of Time Series Analysis, EarlyView.
ABSTRACT The problem of selecting the smoothing parameter, or bandwidth, for kernel‐based estimators of time‐varying coefficients in linear models with possibly endogenous explanatory variables is considered. We examine automated bandwidth selection by means of cross‐validation, a nonparametric variant of Akaike's information criterion, and bootstrap ...
Charisios Grivas, Zacharias Psaradakis
wiley   +1 more source

Online Detection of Forecast Model Inadequacies Using Forecast Errors

Journal of Time Series Analysis, EarlyView.
ABSTRACT In many organizations, accurate forecasts are essential for making informed decisions in a variety of applications, from inventory management to staffing optimization. Whatever forecasting model is used, changes in the underlying process can lead to inaccurate forecasts, which will be damaging to decision‐making.
Thomas Grundy, Rebecca Killick, Ivan Svetunkov   +2 more
wiley   +1 more source

Uso de la función de correlación cruzada en la identificación de modelos ARMA Use of the Crosscorrelation Function in the Identification of ARMA Models

Revista Colombiana de Estadística, 2008
La función de correlación cruzada muestral (FCCM) ha sido empleada para estudiar la fortaleza y la dirección de la relación lineal entre dos procesos estocásticos conjuntamente estacionarios.
ELKIN CASTAÑO, JORGE MARTÍNEZ
doaj  

Secure Relay Selection With Outdated CSI in Cooperative Wireless Vehicular Networks: A DQN Approach

IEEE Access
Cooperative communications is a core research area in wireless vehicular networks (WVNs), thanks to its capability to provide a certain degree of fading mitigation and to improve spectral efficiency.
Esraa M. Ghourab, Lina Bariah, Sami Muhaidat, Paschalis C. Sofotasios, Mahmoud Al-Qutayri, Ernesto Damiani   +5 more
doaj   +1 more source