Results 111 to 120 of about 174,545 (215)

Left-invariant Lorentzian metrics on 3-dimensional Lie groups

Rendiconti di Matematica e delle Sue Applicazioni, 1997
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Luis A. Cordero, Phillip E. Parker
openaire   +2 more sources

Polymorphism in Tetramethylammonium Selenocyanate – Crystal Structures of α‐, β‐, and γ‐[NMe4][SeCN]

Zeitschrift für anorganische und allgemeine Chemie, EarlyView.
This study reports the synthesis and crystallographic investigation of tetramethylammonium selenocyanate. The structures of α‐, β‐, and γ‐[NMe4][SeCN] are related to one another and also to the CsCl‐type. In the solid state, tetramethylammonium selenocyanate, [NMe4][SeCN], is polymorphic.
Sven Ringelband, Jonathan Pfeiffer, Hennes Günther, Sergei Ivlev, Frank Tambornino   +4 more
wiley   +1 more source

Sleep Deprivation in Mice: Looking Beyond the Slow Wave Rebound

Journal of Sleep Research, EarlyView.
ABSTRACT Sleep is a fundamental process supporting the dynamic regulation of neural function. Emerging methods have proposed that the aperiodic components of brain signals (such as the spectral slope, spectral intercept, and spectral knee), in addition to entropy‐based measures, offer robust empirical markers of neural states.
Tárek Zoltán Magyar, Orsolya Szalárdy, Róbert Bódizs   +2 more
wiley   +1 more source

Generalized Bicomplex Numbers and Lie Groups

, 2013
In this paper, we denone the generalized bicomplex numbers and give some algebraic properties of them. Also, we show that some hyperquadrics in R4 and R42 are Lie groups by using generalized bicomplex number product and obtain Lie algebras of these Lie ...
Aksoyak, Ferdağ Kahraman, Karakuş, Sıddıka Özkaldı   +1 more
core  

A Digital Phantom for MR Spectroscopy Data Simulation

Magnetic Resonance in Medicine, Volume 95, Issue 3, Page 1345-1359, March 2026.
ABSTRACT Purpose Simulated data is increasingly valued by researchers for validating MRS processing and analysis algorithms. However, there is no consensus on the optimal approaches for simulation models and parameters. This study introduces a novel MRS digital brain phantom framework, providing a comprehensive and modular foundation for MRS data ...
D. M. J. van de Sande, A. T. Gudmundson, S. Murali‐Manohar, C. W. Davies‐Jenkins, D. Simicic, G. Simegn, İ. Özdemir, S. Amirrajab, J. P. Merkofer, H. J. Zöllner, G. Oeltzschner, R. A. E. Edden   +11 more
wiley   +1 more source

Ionic Control of Microstructure and Lubrication in Charged, Physically Cross‐Linked Hydrogels

Advanced Functional Materials, Volume 36, Issue 13, 12 February 2026.
Here, charged, physically cross‐linked poly(methacrylamide‐co‐methacrylic acid) hydrogels stabilized by a short‐range attractive, long‐range repulsive potential is investigated. This work uncovers how salt addition alters not only swelling, but also the microstructure and dynamics, near‐surface stiffness and charge, and ultimately, its lubricity. Salts
Alexander Deptula, Rosa M. Espinosa‐Marzal   +1 more
wiley   +1 more source

Quantum‐Grade Nanodiamonds from a Single‐Step, Industrial‐Scale Pressure and Temperature Process

Advanced Functional Materials, Volume 36, Issue 12, 9 February 2026.
Novel method for creation of nitrogen‐vacancy centers in 50‐nm nanodiamonds based on high‐temperature plastic deformation is demonstrated. Compared to the electron irradiation approach, it yields nitrogen‐vacancy centers with significantly improved charge stability, T1 relaxation time, and optical Rabi contrast.
Yahua Bao, Michal Gulka, Parkarsh Kumar, Jakub Copak, Priyadharshini Balasubramanian, Yuliya Mindarava, Rémi Blinder, Michael Olney‐Fraser, Haotian Wen, Hana Spanielova, Helen Zhi Jie Zeng, Benjamin Whitefield, Igor Aharonovich, Jaroslav Hruby, Fedor Jelezko, J. Daniel Belnap, Shery L. Y. Chang, Petr Cigler   +17 more
wiley   +1 more source

NH3‐Guided Low‐Temperature Nanostructural Refinement Boosts Visible‐Light‐Driven H2O2 Synthesis in Ionic Carbon Nitrides

Advanced Materials, Volume 38, Issue 7, 2 February 2026.
A nanostructural refinement strategy is reported for KPHI photocatalysts using NH4Cl in a molten salt environment to induce coherent domain fragmentation and controlled cyano defect formation. This dual modification promotes n→π* transitions, enhances charge separation, and accelerates ORR kinetics, yielding exceptional AQY values of 49% (410 nm) and 5%
Jaya Bharti, Jokotadeola Odutola, Zahra Hajiahmadi, Karlo Nolkemper, Zhihong Tian, Haijian Tong, Vitaliy Shvalagin, Thomas D. Kühne, Tero‐Petri Ruoko, Christian Mark Pelicano   +9 more
wiley   +1 more source

Handed Magnon Propagation in Easy‐Axis Antiferromagnetic α‐Fe2O3

Advanced Materials, Volume 38, Issue 9, 12 February 2026.
Coherent excitation and detection of handed magnons are achieved in the easy‐axis antiferromagnet α‐Fe2O3. An external magnetic field lifts the degeneracy between left‐ and right‐handed magnons without affecting their propagation velocity. The Dzyaloshinskii–Moriya interaction and anisotropy modulate their amplitude and damping, enabling intrinsic ...
Chang Xu, Hanbum Park, Chenhui Zhang, Hyunsoo Yang   +3 more
wiley   +1 more source

Tailoring NiO Defectivity to Boost the Electrocatalytic Activity Toward Nitrate Reduction Into Ammonia

ChemistryEurope, Volume 4, Issue 2, February 2026.
Discover how defect‐engineered nickel oxide nanoparticles unlock efficient electrochemical nitrate reduction, turning pollution into sustainable ammonia production, a promising route for greener fertilizers and cleaner water resources. Ammonia is vital for global agriculture, yet its conventional synthesis via the Haber–Bosch process is energy ...
Lorenzo Sibella, Andrea Muscatello, Alessandro Padua, Sara Garcia‐Ballesteros, Micaela Castellino, Antonietta Mancuso, Vincenzo Vaiano, Serena Esposito, Federico Bella   +8 more
wiley   +1 more source