Results 31 to 40 of about 53,545 (167)

Quantum Confinement and Negative Heat Capacity [PDF]

open access: yes, 2013
Thermodynamics dictates that the specific heat of a system is strictly non-negative. However, in finite classical systems there are well known theoretical and experimental cases where this rule is violated, in particular finite atomic clusters.
Alharbi, Fahhad   +3 more
core   +2 more sources

Persistence of entanglement in thermal states of spin systems

open access: yes, 2013
We study and compare the persistence of bipartite entanglement (BE) and multipartite entanglement (ME) in one-dimensional and two-dimensional spin XY models in an external transverse magnetic field under the effect of thermal excitations.
Gehad Sadiek   +5 more
core   +2 more sources

SABRE hyperpolarisation of vitamin B3 as a function of pH [PDF]

open access: yes, 2017
In this work we describe how the signal enhancements obtained through the SABRE process in methanol-d4 solution are significantly affected by pH. Nicotinic acid (vitamin B3, NA) is used as the agent, and changing pH is shown to modify the level of ...
Adams   +39 more
core   +1 more source

Neuroimaging and clinical findings in a case of linear scleroderma en coup de sabre

open access: yesRadiology Case Reports, 2018
Linear scleroderma “en coup de sabre” is a subset of localized scleroderma with band-like sclerotic lesions typically involving the frontoparietal regions of the scalp.
Ikram E. Duman, MD, Gazanfer Ekinci
doaj   +1 more source

Understanding of mental fatigue in elite fencing sports: perspectives from Chinese national level fencers

open access: yesFrontiers in Psychology
IntroductionRecent studies have documented the presence, fluctuation, and persistence of mental fatigue (MF) across various elite sports. It appears that open-skilled competitive contexts tend to impose greater mental demands, leading to higher levels of
Chao Bian   +12 more
doaj   +1 more source

Brain cavernomas associated with en coup de sabre linear scleroderma: Two case reports

open access: yesPediatric Rheumatology Online Journal, 2011
Linear scleroderma is a form of localized scleroderma that primarily affects the pediatric population. When it occurs on the scalp or forehead, it is termed "en coup de sabre".
Laxer Ronald M   +5 more
doaj   +1 more source

Linear scleroderma en coup de sabre presenting with seizures

open access: yesRadiology Case Reports, 2020
Scleroderma is a rare connective tissue disorder categorized into systemic sclerosis and localized scleroderma, also called morphea. Linear scleroderma of the scalp, also called en coup de sabre, is infrequently associated with neurologic symptoms.
Kevin Nguyen, MD   +2 more
doaj   +1 more source

Visual Search Strategies of Elite Fencers: An Exploratory Study in Ecological Competitive Situation

open access: yesJournal of Functional Morphology and Kinesiology, 2023
This study investigates the visual activity of fencers in conditions resembling official competitions. Previous research in experimental conditions has shown that experts focus on specific areas of the torso and the armed arm to control movement ...
Pierre Bagot   +6 more
doaj   +1 more source

Direct searches of dark matter with the SABRE South experiment

open access: yesSciPost Physics Proceedings, 2023
The SABRE (Sodium-iodide with Active Background REjection) South experiment is a direct dark matter detector, made of radio-pure NaI(Tl) crystals surrounded by a liquid scintillator veto.
Madeleine J. Zurowski on behalf of the SABRE South Collaboration
doaj   +1 more source

Generalized Remote Preparation of Arbitrary $m$-qubit Entangled States via Genuine Entanglements [PDF]

open access: yes, 2015
Herein, we present a feasible, general protocol for quantum communication within a network via generalized remote preparation of an arbitrary $m$-qubit entangled state designed with genuine tripartite Greenberger--Horne--Zeilinger-type entangled ...
Hoehn, Ross D.   +3 more
core   +4 more sources

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