Results 141 to 150 of about 137,800 (236)

Hyperspectral Raman imaging to understand patterns in dried biofluids in Alzheimer's disease

VIEW, EarlyView.
Raman spectroscopy is commonly used to identify biomarkers in biological fluids, often focusing on the outer ring of dried droplets due to molecular accumulation from the coffee ring effect. However, this approach may overlook important spectral information, so hyperspectral Raman mapping is used to analyze the entire droplet and identify optimal ...
Eneko Lopez, Giulia Gorla, Jaione Etxebarria‐Elezgarai, Julene Aramendia, Kepa Castro, Maite García‐Sebastián, Pablo Martínez‐Lage, Andreas Seifert, Jose Manuel Amigo   +8 more
wiley   +1 more source

Updating a map of sufficient conditions for the real nonnegative inverse eigenvalue problem

Special Matrices, 2019
The real nonnegative inverse eigenvalue problem (RNIEP) asks for necessary and sufficient conditions in order that a list of real numbers be the spectrum of a nonnegative real matrix.
Marijuán C., Pisonero M., Soto Ricardo L.   +2 more
doaj   +1 more source

Optical implementation of systolic array processing [PDF]

Algorithms for matrix vector multiplication are implemented using acousto-optic cells for multiplication and input data transfer and using charge coupled devices detector arrays for accumulation and output of the results.
Caulfield, H. J., Foster, M. J., Horvitz, S., Rhodes, W. T.   +3 more
core   +1 more source

Boosted unsupervised feature selection for tumor gene expression profiles

CAAI Transactions on Intelligence Technology, EarlyView.
Abstract In an unsupervised scenario, it is challenging but essential to eliminate noise and redundant features for tumour gene expression profiles. However, the current unsupervised feature selection methods treat all samples equally, which tend to learn discriminative features from simple samples.
Yifan Shi, Kaixiang Yang, Mengzhi Wang, Zhiwen Yu, Huanqiang Zeng, Yang Hu   +5 more
wiley   +1 more source

How data or error covariance can change and still retain BLUEs as well as their covariance or the sum of squares of errors

Australian &New Zealand Journal of Statistics, EarlyView.
Summary Misspecification of the error covariance in linear models usually leads to incorrect inference and conclusions. We consider two linear models, A$$ \mathcal{A} $$ and B$$ \mathcal{B} $$, with the same design matrix but different error covariance matrices. The conditions under which every representation of the best linear unbiased estimator (BLUE)
Stephen J. Haslett, Jarkko Isotalo, Augustyn Markiewicz, Simo Puntanen   +3 more
wiley   +1 more source

Multiphysics Simulation Methods in Computer Graphics

Computer Graphics Forum, EarlyView.
Abstract Physics simulation is a cornerstone of many computer graphics applications, ranging from video games and virtual reality to visual effects and computational design. The number of techniques for physically‐based modeling and animation has thus skyrocketed over the past few decades, facilitating the simulation of a wide variety of materials and ...
Daniel Holz, Stefan Rhys Jeske, Fabian Löschner, Jan Bender, Yin Yang, Sheldon Andrews   +5 more
wiley   +1 more source

On a nonnegative irreducible matrix that is similar to a positive matrix

Open Mathematics, 2011
Abstract Let A be an n×n irreducible nonnegative (elementwise) matrix. Borobia and Moro raised the following question: Suppose that every diagonal of A contains a positive entry. Is A similar to a positive matrix? We give an affirmative answer in the case n = 4.
openaire   +3 more sources

Exploratory Analysis of Scientific Publications for University Governance

Computer Graphics Forum, EarlyView.
This paper presents an exploratory system for the visual analysis of scientific publications for University governance. The application creates a 2D spatialisation of the publications of an institution, with an automatic clustering approach that groups papers in disciplines of research.
A. Gràcia, L. Padró, E. Alarcon, P. Vázquez   +3 more
wiley   +1 more source

Identifying and predicting headache trajectories among those with acute post‐traumatic headache

Headache: The Journal of Head and Face Pain, EarlyView.
Abstract Objectives/Background Post‐traumatic headache (PTH) is a common symptom following mild traumatic brain injury (mTBI). Currently, there is no identified way to accurately predict if, when, and at what pace a person will have PTH improvement. In our prior studies, we focused on predicting headache improvement at 3 months post‐mTBI. However, that
Lingchao Mao, Jing Li, Todd J. Schwedt, Teresa Wu, Katherine Ross, Gina Dumkrieger, Dani C. Smith, Catherine D. Chong   +7 more
wiley   +1 more source

The Unemployment‐Risk Channel in Business‐Cycle Fluctuations

International Economic Review, EarlyView.
ABSTRACT The unemployment‐risk channel (URC) amplifies an initial contraction through a reduction in consumption demand by workers who fear unemployment. Crucial for this are the dynamics of job separations and firm hiring. In US data, the job‐finding rate responds slower to identified macroeconomic shocks than the separation rate, but accounts for a ...
Tobias Broer, Jeppe Druedahl, Karl Harmenberg, Erik Öberg   +3 more
wiley   +1 more source