Results 21 to 30 of about 7,957,103 (318)

The common state filter for SLAM [PDF]

open access: yes, 2008
This paper presents the Common State Filter (CSF), a novel and efficient suboptimal Multiple Hypothesis SLAM (MHSLAM) method for Kalman Filter-based SLAM algorithms. Conventional MHSLAM algorithms require the entire vehicle and map state to be copied for
Julier, SJ, Parsley, MP
core   +1 more source

Support for the habitat amount hypothesis from a global synthesis of species density studies.

open access: yesEcology Letters, 2020
Decades of research suggest that species richness depends on spatial characteristics of habitat patches, especially their size and isolation. In contrast, the habitat amount hypothesis predicts that (1) species richness in plots of fixed size (species ...
James I. Watling   +17 more
semanticscholar   +1 more source

Feedforward and feedback control in apraxia of speech: effects of noise masking on vowel production [PDF]

open access: yes, 2015
PURPOSE: This study was designed to test two hypotheses about apraxia of speech (AOS) derived from the Directions Into Velocities of Articulators (DIVA) model (Guenther et al., 2006): the feedforward system deficit hypothesis and the feedback system ...
Guenther, Frank H.   +2 more
core   +1 more source

Divorce in cooperatively breeding long-tailed tits: a consequence of inbreeding avoidance? [PDF]

open access: yes, 2000
The decision of whether to divorce a breeding partner between reproductive attempts can significantly affect individual fitness. In this paper, we report that 63% of surviving pairs of long-tailed tits Aegithalos caudatus divorced between years.
Fowlie, M.K.   +3 more
core   +2 more sources

Examining the Role of Phoneme Frequency in First Language Perceptual Attrition

open access: yesLanguages, 2023
In this paper, we follow up on previous findings concerning first language (L1) perceptual attrition to examine the role of phoneme frequency in influencing variation across L1 contrasts.
Charles B. Chang, Sunyoung Ahn
doaj   +1 more source

Temporal adaptation enhances efficient contrast gain control on natural images. [PDF]

open access: yesPLoS Computational Biology, 2013
Divisive normalization in primary visual cortex has been linked to adaptation to natural image statistics in accordance to Barlow's redundancy reduction hypothesis.
Fabian Sinz, Matthias Bethge
doaj   +1 more source

Recurrent neck swelling after iodinated contrast media administration

open access: yesRadiology Case Reports, 2021
A 74-year-old male with an abdominal aortic aneurism reported 2 episodes of neck swelling 16 hours after an abdominal CT with iodinated contrast media that reappeared in a subsequent CT, although the use of pre-medication.
Inês Machado Cunha, MD   +4 more
doaj   +1 more source

Specialized face perception mechanisms extract both part and spacing information: evidence from developmental prosopagnosia [PDF]

open access: yes, 2006
It is well established that faces are processed by mechanisms that are not used with other objects. Two prominent hypotheses have been proposed to characterize how information is represented by these special mechanisms.
Duchaine, B, Yovel, G
core   +1 more source

Marginal contrasts and the Contrastivist Hypothesis

open access: yesGlossa: a journal of general linguistics, 2016
The Contrastivist Hypothesis (CH; Hall 2007; Dresher 2009) holds that the only features that can be phonologically active in any language are those that serve to distinguish phonemes, which presupposes that phonemic status is categorical. Many researchers, however, demonstrate the existence of gradient relations.
Hall, Daniel Currie   +1 more
openaire   +2 more sources

Brain-First versus Gut-First Parkinson’s Disease: A Hypothesis

open access: yesJournal of Parkinson's Disease, 2019
Parkinson’s disease (PD) is a highly heterogeneous disorder, which probably consists of multiple subtypes. Aggregation of misfolded alpha-synuclein and propagation of these proteinacious aggregates through interconnected neural networks is believed to be
P. Borghammer, Nathalie Van Den Berge
semanticscholar   +1 more source

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