Results 81 to 90 of about 32,052 (192)

Meeting the Constraint of Neutrino-Higgsino Mixing in Gravity Unified Theories [PDF]

open access: yes, 1997
In Gravity Unified Theories all operators that are consistent with the local gauge and discrete symmetries are expected to arise in the effective low-energy theory.
Aldazabal   +37 more
core   +3 more sources

Weak hydrogen bonding in the structures of three double‐acylated aminoantipyrines

open access: yesActa Crystallographica Section C, Volume 81, Issue 12, Page 687-693, December 2025.
The structures of three doubly‐acylated 4‐aminoantipyrine compounds where the aryl substituent is varied are reported and analysed in terms of their relative conformation, intermolecular interactions and overall packing. The compounds were crystallized using the encapsulated nanodroplet crystallization (ENaCt) protocol.The structures of three doubly ...
Lina Mardiana   +4 more
wiley   +1 more source

Revitalization of Axial Flow Pump/Turbine h26 Test Rig

open access: yes, 2016
Various solutions are available in the market to enhance the quality of laboratory experiments, but the majorities are expensive. In this study, we present a low-cost approach for the automation and computer aided control of an axial flow pumpturbine test rig, which can be easily adapted to varying demands of laboratory applications.
openaire   +2 more sources

Historical Drainage Evolution and Water Level Fluctuations in the African Great Lakes Shaped Phylogeny and Biogeography of Freshwater Gastropods

open access: yesJournal of Biogeography, Volume 52, Issue 12, December 2025.
ABSTRACT Aim The role of historical drainage connectivity and the influence of water level fluctuations in African lakes on the evolution and distribution of macroinvertebrates remain poorly understood. This is partly because evolutionary biology research has largely focused on mobile vertebrates, such as cichlids.
Marie Claire Dusabe   +6 more
wiley   +1 more source

Determinants of aggregate income-tax-evasion behaviour: the case of US

open access: yesPSL Quarterly Review, 2013
The determinants of aggregate income-tax-evasion behaviour as reflected in the size of the underground economy in the US are analysed. These factors include the federal personal income tax rate, the social security tax rate, the federal corporation ...
R.J. CEBULA
doaj   +1 more source

Higher‐order spatiotemporal wave packets with Gouy phase dynamics

open access: yesNanophotonics, Volume 14, Issue 24, Page 4435-4446, December 2025.
Abstract Spatiotemporal (ST) wave packets constitute a broad class of optical pulses whose spatial and temporal degrees of freedom cannot be treated independently. Such space‐time non‐separability can induce exotic physical effects such as non‐diffraction, non‐transverse waves, and sub or superluminal propagation.
Wangke Yu, Yijie Shen
wiley   +1 more source

Pyridocarbene‐Based Tetradentate Pt(II) Complexes for Long Device Lifetime over 500 h in Blue Phosphorescent Organic Light–Emitting Diodes

open access: yesAdvanced Materials, Volume 37, Issue 44, November 6, 2025.
Pt‐impy and Pt‐Me‐impy exhibit external quantum efficiencies of 24.5% and 27.4% at the 3 wt.% doping concentration, respectively. In particular, Pt‐impy and Pt‐Me‐impy doped blue PhOLEDs optimized for stability demonstrate a device lifetime of up to 95% of the initial luminance of 543 and 228 h at 1000 cd m−2, which has never been achieved in the blue ...
Kiun Cheong   +12 more
wiley   +1 more source

The Determinants of Customs Duties Evasion in Egypt

open access: yesECONOMICS
Following the Arab Spring in 2011, Egypt implemented policies to restrict imports to control foreign currency spending, as foreign currency reserves dwindled.
Barbary Mahmoud Magdy
doaj   +1 more source

Impact of income-detection technology and other factors on aggregate income tax evasion:the case of the United States

open access: yesPSL Quarterly Review, 2012
This study empirically investigates the impact of improving income-detectiontechnology, as well as a variety of other factors, on aggregate income taxevasion. The study focuses on the U.S., using available data for the 1975-97 period.
Richard J. Cebula
doaj   +1 more source

Room temperature chiral discrimination in paramagnetic NMR spectroscopy

open access: yes, 2016
A recently proposed theory of chiral discrimination in NMR spectroscopy based on the detection of a molecular electric polarization $\mathbf{P}$ rotating in a plane perpendicular to the NMR magnetic field [A. D. Buckingham, J. Chem. Phys. $\mathbf{140}$,
Calvello, Simone, Soncini, Alessandro
core   +1 more source

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