Results 31 to 40 of about 3,854,431 (299)

External Bootstrap Tests for Parameter stability [PDF]

open access: yes, 2002
This article considers tests for parameter stability over time in general econometric models, possibly nonlinear-in-variables. Existing test statistics are commonly not asymptotically pivotal under nonstandard conditions.
Delgado, Miguel A., Fiteni, Inmaculada
core   +1 more source

Review of Material Parameter Calibration Method

open access: yes, 2022
The discrete element method and simulation analysis of the interaction between granular materials and implements provide a convenient and effective method for the optimal design of farming machinery.
Xinzhong Wang   +3 more
core   +1 more source

Protocol for quantifying miRNA trafficking across the endosomal membrane

open access: yesFEBS Open Bio, EarlyView.
An in vitro protocol measures miRNA uptake into endosomes isolated from mammalian cell extracts, which are free of subcellular contaminants. Performed at 37 °C in the presence of ATP, it ensures the import of single‐stranded miRNA into the endosomal lumen.
Syamantak Ghosh   +2 more
wiley   +1 more source

A Vision-Based Self-Calibration Method for Robotic Visual Inspection Systems

open access: yesSensors, 2013
A vision-based robot self-calibration method is proposed in this paper to evaluate the kinematic parameter errors of a robot using a visual sensor mounted on its end-effector.
Shibin Yin   +4 more
doaj   +1 more source

A simplified algorithm for leaky network analyzer calibration [PDF]

open access: yes, 1995
A new algorithm for network analyzer calibration is presented. The error model includes leakage effects and can be applied to a general n-port NWA. The 2-port 16-term model becomes a special case of this new technique which is also hopefully suitable for
F. Sanpietro   +2 more
core   +1 more source

Structural and biochemical insights into the thermostable esterase Ta0887 from Thermoplasma acidophilum

open access: yesFEBS Open Bio, EarlyView.
In this study, a novel esterase from the thermoacidophilic archaeon Thermoplasma acidophilum was biochemically and structurally characterized. Our results demonstrate that Ta0887 is a highly thermostable esterase that preferentially hydrolyzes p‐nitrophenyl hexanoate and possesses an α‐helical cap domain that likely contributes to its substrate ...
Alejandro Delgado‐Rey   +4 more
wiley   +1 more source

Optimal calibration in immunoassay and inference on the coefficient of variation [PDF]

open access: yes, 2008
This thesis examines and develops statistical methods for design and analysis with applications in immunoassay and other analytical techniques. In immunoassay, concentrations of components in clinical samples are measured using antibodies.
Forkman, Johannes
core   +1 more source

3-D Modeling of Traffic Accidents Scenes Using a UAV-Borne SSL-Camera System

open access: yesIEEE Access
To address the time-consuming investigation and inaccurate modeling problems of conventional road accident scenes, this paper proposes a remote sensing-based accident modeling method using multi-sensor data fusion.
Xinyi Zhang   +3 more
doaj   +1 more source

Chronobiology of Cancer: How Aging Fuels Oncogenesis at the Molecular Level

open access: yesAging and Cancer, EarlyView.
This graphical abstract illustrates the key biological pathways linking aging with cancer development and progression. In the upper left, cumulative exposure to ultraviolet radiation, toxins, and reactive oxygen species (ROS) causes DNA damage and genomic instability, whereas age‐related decline in repair mechanisms, such as ATM/ATR, BER, and NER ...
Anu Singh, Aroonima Misra, Sufian Zaheer
wiley   +1 more source

On-Orbit Geometric Calibration Model and Its Applications for High-Resolution Optical Satellite Imagery

open access: yesRemote Sensing, 2014
On-orbit geometric calibration is a key technology to guarantee the geometric quality of high-resolution optical satellite imagery. In this paper, we present an approach for the on-orbit geometric calibration of high-resolution optical satellite imagery,
Mi Wang, Bo Yang, Fen Hu, Xi Zang
doaj   +1 more source

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