Results 81 to 90 of about 450,020 (291)

Positive matrix factorization of large real-time atmospheric mass spectrometry datasets using error-weighted randomized hierarchical alternating least squares [PDF]

open access: yesGeoscientific Model Development
Weighted positive matrix factorization (PMF) has been used by scientists to find small sets of underlying factors in environmental data. However, as the size of the data has grown, increasing computational costs have made it impractical to use ...
B. C. Sapper   +7 more
doaj   +1 more source

Multidimensional Profiling of MRI‐Negative Temporal Lobe Epilepsy Uncovers Distinct Phenotypes

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Although hippocampal sclerosis (TLE‐HS) represents the most frequent cause of temporal lobe epilepsy (TLE), up to 30% of patients show no lesion on visual MRI inspection (TLE‐MRIneg). These cases pose diagnostic and therapeutic challenges and are underrepresented in surgical series.
Alice Ballerini   +28 more
wiley   +1 more source

Dual-quaternion-based iterative algorithm of the three dimensional coordinate transformation

open access: yesEarth, Planets and Space
Nowadays a unit quaternion is widely employed to represent the three-dimensional (3D) rotation matrix and then applied to the 3D similarity coordinate transformation.
Huaien Zeng   +5 more
doaj   +1 more source

Applying Monte Carlo Method for Straight-Line Model Sensor Calibration

open access: yesSensors
Sensors are used in measurement systems to enable estimation of physical parameters. Their calibration is an essential requirement and to perform the overall system/sensor calibration, its input is changed while the output is measured. Parameters from an
Pedro M. Ramos, Fernando M. Janeiro
doaj   +1 more source

Association between local-level resources for home care and home deaths: A nationwide spatial analysis in Japan.

open access: yesPLoS ONE, 2018
AimLittle is known about whether and how local-level resources regarding home care are associated with the prevalence of home deaths. We aimed to investigate whether geographic patterns of the resources for home care were associated with the prevalence ...
Noriko Morioka   +5 more
doaj   +1 more source

The employment effects of innovation [PDF]

open access: yes
The issue of technological unemployment receives perennial popular attention. Although there are previous empirical investigations that have focused on the relationship between innovation and employment, the originality of our approach lies in our choice
Alex Coad, Rekha Rao
core  

Manifold Approximation by Moving Least-Squares Projection (MMLS)

open access: yes, 2019
In order to avoid the curse of dimensionality, frequently encountered in Big Data analysis, there was a vast development in the field of linear and nonlinear dimension reduction techniques in recent years.
Levin, David, Sober, Barak
core   +1 more source

Normal‐Appearing White Matter Injury Mediates Chronic Deep Venous Hypoxia and Disease Progression in Multiple Sclerosis

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To explore how cerebral hypoxia and Normal‐Appearing White Matter (NAWM) integrity affect MS lesion burden and clinical course. Methods Seventy‐nine MS patients, including 13 clinically isolated syndrome (CIS) patients and 66 relapsing–remitting multiple sclerosis (RRMS) patients, and 44 healthy controls (HCs) were recruited from ...
Xinli Wang   +8 more
wiley   +1 more source

Spatial Variations in Fertility of South Korea: A Geographically Weighted Regression Approach

open access: yesISPRS International Journal of Geo-Information, 2019
South Korea has witnessed a remarkable decline in birth rates in the last few decades. Although there has been a large volume of literature exploring the determinants of low fertility in South Korea, studies on spatial variations in fertility are scarce.
Myunggu Jung   +3 more
doaj   +1 more source

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