Results 101 to 110 of about 52,118 (271)

Learning to calibrate age estimates

Journal of Vision, 2019
Age is a primary social category and, with little effort, we can quickly approximate it from photographs. Here, we analyze1.5 million age judgments derived from a popular online website where participants estimate the age of a person depicted ina photograph, with feedback.
Jordan W Suchow, Thomas L Griffiths
openaire   +3 more sources

Extrinsic Calibration of Camera Networks Using a Sphere

Sensors, 2015
In this paper, we propose a novel extrinsic calibration method for camera networks using a sphere as the calibration object. First of all, we propose an easy and accurate method to estimate the 3D positions of the sphere center w.r.t.
Junzhi Guan, Francis Deboeverie, Maarten Slembrouck, Dirk van Haerenborgh, Dimitri van Cauwelaert, Peter Veelaert, Wilfried Philips   +6 more
doaj   +1 more source

Hip Morphology–Based Osteoarthritis Risk Prediction Models: Development and External Validation Using Individual Participant Data From the World COACH Consortium

Arthritis Care &Research, EarlyView.
Objective This study aims to develop hip morphology‐based radiographic hip osteoarthritis (RHOA) risk prediction models and investigates the added predictive value of hip morphology measurements and the generalizability to different populations. Methods We combined data from nine prospective cohort studies participating in the Worldwide Collaboration ...
Myrthe A. van den Berg, Fleur Boel, Michiel M. A. van Buuren, Noortje S. Riedstra, Jinchi Tang, Harbeer Ahedi, Nigel K. Arden, Sita M. A. Bierma‐Zeinstra, Cindy G. Boer, Flavia M. Cicuttini, Timothy F. Cootes, David T. Felson, Willem Paul Gielis, Joshua Heerey, Graeme Jones, Stefan Kluzek, Nancy E. Lane, Claudia Lindner, Joyce B. J. van Meurs, Andrea Mosler, Amanda E. Nelson, Michael C. Nevitt, Edwin H. Oei, Jos Runhaar, Harrie Weinans, Jesse H. Krijthe, Rintje Agricola   +26 more
wiley   +1 more source

Two-steps variance calibrated estimators with linear and non-linear constraints for mailed surveys with non-response

Alexandria Engineering Journal
This paper proposed a new class of variance estimators that uses a two-step technique with designed weights based on linear and non-linear constraints to handle the presence of non-response in sample surveys.
Ahmed Audu, Maggie Aphane
doaj   +1 more source

The Efficiency of OLS Estimators of Structural Parameters in a Simple Linear Regression Model in the Calibration of the Averages Scheme

Folia Oeconomica Stetinensia, 2016
A simple linear regression model is one of the pillars of classic econometrics. Multiple areas of research function within its scope. One of the many fundamental questions in the model concerns proving the efficiency of the most commonly used OLS ...
Kowal Robert
doaj   +1 more source

A Note on The Moments of Stochastic Shrinkage Parameters in Ridge Regression [PDF]

A common problem in econometric models and multiple regression in general is multicollinearity, which produces undesirable effects on the Least Squares estimators.
Hernán Rubio, Luis Firinguetti
core  

Ultrasonography Compared With Computed Tomography in Identifying Thoracic Aortic Aneurysms in Patients With Giant Cell Arteritis

Arthritis Care &Research, EarlyView.
Objective The objectives of this study were to evaluate the correlation and agreement between ultrasonography and computed tomography (CT) in measuring ascending aorta diameter in patients with giant cell arteritis (GCA) and to investigate the development of new ascending aortic aneurysms in patients with newly diagnosed GCA.
Anne C. Bull Haaversen, Lene K. Brekke, Tanaz A. Kermani, Øyvind Molberg, Andreas P. Diamantopoulos   +4 more
wiley   +1 more source

New efficient calibrated estimators for the population distribution function using two auxiliary variables

Franklin Open
The population distribution function (DF) plays a crucial role in public health; its applications include modeling drug absorption/clearance rates, guiding personalized dosage decisions, and understanding patterns of infectious period durations.
Afsar Basha S.M., Mahamood Usman
doaj   +1 more source

Diffusion‐Weighted Imaging for the Evaluation of the Sacroiliac Joint in Pediatric Patients

Arthritis Care &Research, EarlyView.
Objective Maturational signal in the sacroiliac joint (SIJ) of skeletally immature youth is often misinterpreted as inflammation. Diagnostic tools that improve specificity are greatly needed. Apparent diffusion coefficient (ADC) values from diffusion‐weighted imaging (DWI), when used with standard imaging, may enhance diagnostic accuracy.
Michael L. Francavilla, Timothy G. Brandon, Dmitry Khrichenko, Rui Xiao, Nancy A. Chauvin, Asef Khwaja, Pamela F. Weiss   +6 more
wiley   +1 more source

On Partially Linear Single-Index Models with Missing Response and Error-in-Variable Predictors

Journal of Statistical Theory and Applications (JSTA), 2019
In this paper, we consider a partially linear single-index model when missing responses and nonlinear regressors with measurement error are taken into account.
Tsung-Lin Cheng, Yin-Ying Lin, Xuewen Lu, Radhey Singh   +3 more
doaj   +1 more source