Results 171 to 180 of about 4,821 (295)

Size Matters: Barrier Heights and Widths in the Kinetics Of Tautomerisation and Rotamerisation of Thiotropolone and Its Five‐ and Three‐Membered Cyclic Analogues

International Journal of Chemical Kinetics, EarlyView.
ABSTRACT Recent experiments by Nunes et al. have demonstrated that unprecedented control of chemical reactions is possible by narrowband infrared vibrational photo‐excitation at low temperatures in inert matrices. The generated higher energy level conformers may then undergo rotamerisation and tautomerisation reactions which provide extremely useful ...
Judith Wurmel, John M. Simmie
wiley   +1 more source

Optimal error estimates of the diffuse domain method for second order parabolic equations. [PDF]

BIT Numer Math
Hao W, Ju L, Xu Y.
europepmc   +1 more source

Microbiological Mechanisms of Sand‐Mixed Soil Improvement in Continuously Cropped Soil

Land Degradation &Development, EarlyView.
ABSTRACT Sand‐mix soil is a widely adopted method for soil improvement in agricultural production. However, beyond the evident enhancement of physical structure, the mechanisms by which sand‐mix soil promotes crop root growth by influencing soil physicochemical properties and microbial communities remain insufficiently understood.
Yue Huang, Meng Jia, Xuanquan Zhu, Yuxiang Bai, Jie Li, Tikun Zhang, Xiaojun Zhao, Weidi Tang, Mengyuan Lyu, Xingyang Xu, Ge Wang, Na Wang   +11 more
wiley   +1 more source

Coupled experimental and numerical parametric study of projectile penetration into granular sandy soils under low-velocity impact. [PDF]

Sci Rep
Osman AK, Elshesheny A, Zahran MS, Nagy NM.   +3 more
europepmc   +1 more source

Broadband Mode Converter With Customizable Modal Ratio Leveraging Subwavelength Engineering for Advanced Multimode Silicon Photonics

Laser &Photonics Reviews, EarlyView.
This work introduces a customizable mode converter for multimode silicon photonics, enabling precise control over the conversion ratio between optical modes. The device operates across a broad wavelength range (1350–1700 nm) with 15 distinct conversion levels.
Raquel Fernández de Cabo, Alejandro Sánchez‐Sánchez, Paula Nuño Ruano, Roy Ronald Prosopio Galarza, Daniele Melati, Carlos Alonso‐Ramos, Aitor V. Velasco, David González‐Andrade   +7 more
wiley   +1 more source

The geometry of Nature's stingers is universal due to stochastic mechanical wear. [PDF]

Proc Natl Acad Sci U S A
Sebastian J, Jensen KH.
europepmc   +1 more source

Supercritical Angle Fluorescence and Raman Techniques in Biophotonics

Laser &Photonics Reviews, EarlyView.
Supercritical angle fluorescence (SAF) microscopy and supercritical angle Raman (SAR) spectroscopy have emerged as powerful tools in the field of biophotonics, enabling high‐resolution imaging and spectroscopy of biological specimens near interfaces. This review article provides a comprehensive overview of the principles, techniques, applications, and ...
Subir Das, Nathalia Simea Münch, Stefan Seeger   +2 more
wiley   +1 more source

Aberration corrections for quasi-conformal transformation optics-based reflectors. [PDF]

Sci Rep
Cross B, Friedrichs G, Filipovic D.
europepmc   +1 more source

Multimode Phonon Lasing via Self‐Induced Optical Coherent Pumping

Laser &Photonics Reviews, EarlyView.
A silicon optomechanical nanobeam generates self‐sustained phonon lasing in multiple competing mechanical modes via self‐pulsing, an intrinsic optical modulation arising from cavity nonlinearity. This self‐organized mechanism enables robust multi‐frequency operation spanning periodic, quasi‐periodic, and chaotic regimes without external modulation. The
David Alonso Tomás, Carlos Mas Arabí, Carles Milián, Néstor E. Capuj, Alejandro Martínez, Daniel Navarro Urrios   +5 more
wiley   +1 more source

A Comparison of Coupling Strategies for 1D-3D Simulations of Coronary Hemodynamics. [PDF]

Int J Numer Method Biomed Eng
Hilhorst PLJ, Vermeer AJE, Zając K, van 't Veer M, Rezaeimoghaddam M, van de Vosse FN, Huberts W.   +6 more
europepmc   +1 more source