Results 171 to 180 of about 24,434,227 (249)
Must Longtermists Wish Us All Dead? A Quadrilemma
Journal of Applied Philosophy, EarlyView.ABSTRACT Longtermists assign great moral importance to making the long‐term future as good as possible, especially by ensuring the survival of humanity. We argue, to the contrary, that on assumptions that are plausible, conservative, or shared by leading longtermists, human extinction will likely augment total utility among human and non‐human animals ...
Nir Eyal, Bastian Steuwer, Shai Meiri
wiley +1 more source
Journal of Raman Spectroscopy, EarlyView.We apply a sharp silicon tip, typically used for atomic force microscopy (AFM), as a nanoscale probe, and collect frequency‐shifted photons resulting from Raman scattering within the sharp tip. This approach allows us to map local electromagnetic fields in various plasmonic structures and study field “hotspots” with nanometer spatial resolution ...
Zhi Gao, Alexei V. Sokolov
wiley +1 more source
A Scientific Revolution: the Hubble and James Webb Space Telescopes (Free Astronomy Public Lectures)
, 2011 Astronomy is going through a scientific revolution, responding to a flood of data from the Hubble Space Telescope, other space mission and large telescopes on the ground. In this talk, I will discuss some of the most important astronomical discoveries of
Dr Jonathan Gardner
core
Revealing the Resonant Physics of Open Photonic Time Crystals
Laser &Photonics Reviews, EarlyView.ABSTRACT Photonic time crystals (PTCs) are media whose permittivity is modulated periodically in time, enabling momentum bandgaps and parametric amplification of light. Their realization at the nanoscale can revolutionize the study of light‐matter interactions.
Adrià Canós Valero +5 more
wiley +1 more source
Intrinsically Design‐Rule‐Compliant Nanophotonic Inverse Design via Learned Generative Manifolds
Laser &Photonics Reviews, EarlyView.A generative reparameterization framework for nanophotonic inverse design is introduced, restricting optimization to a learned manifold of design‐rule‐compliant geometries. Unlike conventional penalty‐based approaches, fabrication constraints are encoded intrinsically within the design representation.
Bahrem Serhat Danis +8 more
wiley +1 more source
Wavefront Shaping for Optimal Extinction of Focused Light by Individual Nanoscatterers
Laser &Photonics Reviews, EarlyView.Wavefront shaping enables near‐complete optical extinction by nanoscatterers separated from a planar reflector. Time‐reversed emission profiles provide optimal illumination conditions, yielding 70% extinction from a single plasmonic nanoparticle and up to 90% from sub‐wavelength nanoparticle clusters, offering a promising route to efficient in‐ and out‐
Nick Feldman +5 more
wiley +1 more source
Tircam:A mid-infrared camera for ground-based astronomy [PDF]
Experimental Astronomy, 1995 P. Persi +12 more
openaire +1 more source
Laser &Photonics Reviews, EarlyView.Temporal interfaces are abrupt refractive index changes used in time‐varying optics, but also transitions to nonequilibrium states. This work explores the inelastic scattering of time‐varying light by nonthermal acoustic phonons in the vicinity of temporal interfaces.
Anuj Kumar Dhiman +10 more
wiley +1 more source
Whole‐Brain Diffusion MRI at 7T With Universal Multiband GRAPE pTx Pulses
Magnetic Resonance in Medicine, EarlyView.Purpose To improve signal strength and homogeneity of whole‐brain diffusion‐weighted imaging (DWI) at 7T. Methods Universal multiband excitation and refocusing pulses were optimized with the gradient ascent pulse engineering (GRAPE) algorithm across a database of B1+$$ {B}_1^{+} $$ and B0$$ {B}_0 $$ maps obtained from 20 subjects.
Marten Laufenberg +5 more
wiley +1 more source
Predicting Mesoscopic Larmor Frequency Shifts in Ex Vivo Porcine Optic Nerve
Magnetic Resonance in Medicine, EarlyView.ABSTRACT Purpose Larmor frequency shifts in white matter (WM) vary with fiber orientation due to anisotropic microstructure. Since clinical voxels are significantly larger than these microscopic frequency variations, the measured signal represents a bulk average of local shifts.
Anders Dyhr Sandgaard +9 more
wiley +1 more source