Results 91 to 100 of about 2,810 (193)

Theoretical efficiency of a wind turbine in non-uniform base flow: Revisiting the Betz–Joukowsky limit

open access: yesPhysics of Fluids
Classical one-dimensional momentum theory suggests that there is an upper limit to the power that can be extracted from the available wind resource. In the present work, we relax the assumption of constant velocity and investigate how the power efficiency of a turbine is affected by a non-uniform velocity field in the base flow. The analysis shows that
Arslan Salim Dar   +2 more
openaire   +1 more source

Dietary Acid Load and Kidney Stones: NEAP Shows a Positive Association in a Nationally Representative Sample

open access: yesFood Science &Nutrition, Volume 14, Issue 6, June 2026.
Higher NEAP was associated with higher odds of kidney stones in US adults; PRAL showed a weaker/borderline association after full adjustment. ABSTRACT This study aimed to examine the associations of Dietary acid load (DAL), estimated by net endogenous acid production (NEAP) and potential renal acid load (PRAL), with the prevalence of kidney stones in ...
Yunfan Chen, Qiyu He
wiley   +1 more source

Random permutations of a regular lattice

open access: yes, 2014
Spatial random permutations were originally studied due to their connections to Bose–Einstein condensation, but they possess many interesting properties of their own.
Betz, Volker
core   +1 more source

Experimental Factors and Techniques for Pool Boiling Heat Transfer Enhancement: A Critical Review

open access: yesHeat Transfer, Volume 55, Issue 4, Page 2201-2232, June 2026.
ABSTRACT This review presents a comprehensive assessment of active strategies for enhancing pool boiling heat transfer, with a focus on techniques that do not rely solely on the boiling surface modification. It examines a broad range of methodologies including fluid additives, external fields, mechanical interventions, and thermal‐geometric tuning that
José E. Pereira   +2 more
wiley   +1 more source

Empowerment or Pressure? Exploring the Impact of Female Body Depictions in Body Positivity Instagram Posts on Self‐Objectification

open access: yesInternational Journal of Psychology, Volume 61, Issue 3, June 2026.
ABSTRACT Although Body Positivity content (BoPo) has been criticised for emphasising physical appearance and promoting self‐objectification, the specific features driving these effects remain unclear. The present study examined whether depictions of female bodies act as triggers for self‐objectification in BoPo on Instagram.
Nina Krizova   +2 more
wiley   +1 more source

Dystrophinopathy with a DMD exon 49–50 deletion in a female patient who developed schizophrenia: An autopsy case

open access: yesPsychiatry and Clinical Neurosciences Reports, Volume 5, Issue 2, June 2026.
Abstract Background Mutations in DMD affect not only muscles but also the brain. Cases of schizophrenia with DMD mutations have been described previously. Although female dystrophinopathy often has a milder phenotype, some affected females also have intellectual disabilities and psychiatric disorders.
Shusei Arafuka   +15 more
wiley   +1 more source

A central limit theorem for Gibbs measures relative to Brownian motion, Probab. Theory Relate. Fields 131

open access: yes, 2005
We study a Gibbs measure over Brownian motion with a pair potential which depends only on the increments. Assuming a particular form of this pair potential, we establish that in the infinite volume limit the Gibbs measure can be viewed as Brownian motion
Herbert Spohn, Volker Betz
core  

A Wind Turbine Efficiency Limit Higher than the Lanchester (Betz) Limit

open access: yes
It is shown that the upper limit on the fraction of power that can be extracted from an airstream approaching a wind turbine is about 78% rather than the historical value of 59%. This higher limit is based on the assumption that the wind turbine cannot accelerate the flow at its exit plane above the freestream velocity. The derivation of the historical
openaire   +2 more sources

Late Jurassic Carbon Isotope Excursion (Middle Oxfordian Event) Paces With Astronomical Forcing in the Northwestern Tethys

open access: yesGeochemistry, Geophysics, Geosystems, Volume 27, Issue 6, June 2026.
Abstract Marine carbonate carbon isotopes (δ13C), over orbital to multi‐million‐year timescales, provide critical insight into the carbon cycle connecting Earth's atmosphere, lithosphere, hydrosphere and biosphere. However, the influence of astronomical forcing on deep time carbon cycle dynamics remains poorly constrained.
Deyan Zhang   +4 more
wiley   +1 more source

ALK Expression in Nerve Sheath Myxoma: A Potential Diagnostic Pitfall

open access: yes
Journal of Cutaneous Pathology, Volume 53, Issue 7, Page 567-570, July 2026.
Daniel Cole   +6 more
wiley   +1 more source

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