Results 21 to 30 of about 1,188,877 (313)

Rates and predictors of co-occurring autism spectrum disorder in boys with fragile X syndrome

open access: yesAutism and Developmental Language Impairments, 2020
Background and aims Males with fragile X syndrome display many behavioral features of autism spectrum disorder. Despite this overlap, our understanding of autism spectrum disorder symptoms and severity in fragile X syndrome is limited due to variation in
Eileen Haebig   +3 more
doaj   +1 more source

Fourth‐order nonlinear distortion to the power spectrum of RF amplifiers

open access: yesThe Journal of Engineering, 2022
Even‐order intermodulation distortions are often considered easy to filter in narrowband radio frequency (RF) wireless systems because they are usually located far away from the desired passband and adjacent bands.
Xianzhen Yang, Shiyu Li, Fu Li
doaj   +1 more source

Anharmonic DFT Study of Near-Infrared Spectra of Caffeine: Vibrational Analysis of the Second Overtones and Ternary Combinations

open access: yesMolecules, 2021
Anharmonic quantum chemical calculations were employed to simulate and interpret a near-infrared (NIR) spectrum of caffeine. First and second overtones, as well as binary and ternary combination bands, were obtained, accurately reproducing the lineshape ...
Justyna Grabska   +3 more
doaj   +1 more source

On a second spectrum of neon [PDF]

open access: yesProceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character, 1914
Abstract The spectrum of the gases of atmospheric air which were not condensed at the temperature of liquid hydrogen was first investigated by Liveing and Dewar, who found a large number of lines which did not belong to the spectra of hydrogen or helium.
openaire   +1 more source

IDENTIFICATION OF SECOND SPECTRUM OF A TIMOSHENKO BEAM USING DIFFERENTIAL TRANSFORM METHOD [PDF]

open access: yesJournal of Engineering Science and Technology, 2018
In the present work, the vibration characteristics of a Timoshenko beam are examined using Differential Transform Method (DTM) with the end conditions hinge-hinge, fix-hinge, fix-fix and fix-free. The frequencies are computed for the beam with the length
SHALI S., JAFARALI PAROL, NAGARAJA S. R.
doaj  

Impact of the free-streaming neutrinos to the second order induced gravitational waves

open access: yesEuropean Physical Journal C: Particles and Fields, 2022
The damping effect of the free-streaming neutrinos on the second order gravitational waves is investigated in detail. We solve the Boltzmann equation and give the anisotropic stress induced by neutrinos to second order.
Xukun Zhang, Jing-Zhi Zhou, Zhe Chang
doaj   +1 more source

Contribution of Penicillin Allergy Labels to Second-Line Broad-Spectrum Antibiotic Prescribing for Pediatric Respiratory Tract Infections

open access: yesInfectious Diseases and Therapy, 2020
Introduction Antibiotic allergies are overdiagnosed. This may lead to unnecessary use of second-line broader-spectrum agents in place of narrower-spectrum guideline-recommended first-line therapies especially for uncomplicated respiratory tract ...
Adam L. Hersh   +3 more
doaj   +1 more source

Effect of two-cutoff structure in laser-induced recollision dynamics

open access: yesResults in Physics, 2022
We theoretically identify a two-cutoff structure in the recollision energy distribution of the third-return recollision trajectories whose contribution is dominant in the high-energy part of the above-threshold ionization (ATI) spectrum.
Yuxing Bai   +3 more
doaj   +1 more source

On the generalized spectrum for second-order elliptic systems [PDF]

open access: yesTransactions of the American Mathematical Society, 1987
We consider the system of homogeneous Dirichlet boundary value problems ( ∗
Cantrell, Robert Stephen, Cosner, Chris
openaire   +1 more source

Migration and autism spectrum disorder: population-based study. [PDF]

open access: yes, 2012
BACKGROUND: Migration has been implicated as a risk factor for autism, but evidence is limited and inconsistent. AIMS: To investigate the relationship between parental migration status and risk of autism spectrum disorder, taking into consideration the ...
Goodman, Anna   +17 more
core   +1 more source

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