Results 41 to 50 of about 4,473,381 (352)
Optical ReLU-like Activation Function Based on a Semiconductor Laser with Optical Injection [PDF]
arXiv, 2023 Artificial neural networks usually consist of successive linear multiply-accumulate operations and nonlinear activation functions. However, most optical neural networks only achieve the linear operation in the optical domain, while the optical implementation of activation function remains challenging.
arxiv
Frequency Standards and Metrology, 2009 This letter presents the principles and techniques of active optical clock, a special laser combining the laser physics of one-atom laser, bad-cavity gas laser, super-cavity stabilized laser and optical atomic clock. As an example, a compact version of active optical clock based on thermal Strontium atomic beam shows a quantum-limited linewidth of 0.51
openaire +4 more sources
Actively coupled optical waveguides [PDF]
Physical Review A, 2014 4 pages, 5 ...
N. V. Alexeeva +5 more
openaire +4 more sources
Primary extranodal diffuse large B‐cell lymphoma: Molecular features, treatment, and prognosis
Aging and Cancer, Volume 3, Issue 3-4, Page 133-146, September-December 2022., 2022 One‐third of DLBCL arises from extranodal organs and is challenging to manage. Molecular features are critical to elucidate the differences in clinical features, predict the disease prognosis, and improve effective targeted therapeutic strategies. Abstract Diffuse large B‐cell lymphoma (DLBCL) is the most common subtype of non‐Hodgkin's lymphoma and ...
Si‐Yuan Chen +3 more
wiley +1 more source
Stimuli‐responsive active materials for dynamic control of light field
Responsive Materials, 2023 The increasing demand for the multidimensional and dynamic control of light has spurred the development of stimuli‐responsive, reconfigurable, and programmable optical systems.
Ren Zheng +7 more
doaj +1 more source
Optical Activity of Planar Achiral Metamaterials [PDF]
Phys. Rev. Lett., vol. 102, page 113902 (2009), 2008 We report that the classical phenomena of optical activity and circular dichroism, which are traditionally associated with chirality (helicity) of organic molecules, proteins and inorganic structures, can be observed in non-chiral artificial media. Intriguingly, our metamaterial structure yields exceptionally strong resonant optical activity, which ...
arxiv +1 more source
Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022 Abstract Positron emission tomography with x‐ray computed tomography (PET/CT) is increasingly being utilized for radiation treatment planning (RTP). Accurate delivery of RT therefore depends on quality PET/CT data. This study covers quality control (QC) procedures required for PET/CT for diagnostic imaging and incremental QC required for RTP.
Ran Klein +7 more
wiley +1 more source
CdSe-single-nanoparticle based active tips for near-field optical microscopy [PDF]
Nanotechnology 16, 613 (2005), 2006 We present a method to realize active optical tips for use in near-field optics that can operate at room temperature. A metal-coated optical tip is covered with a thin polymer layer stained with CdSe nanocrystals or nanorods at low density. The time analysis of the emission rate and emission spectra of the active tips reveal that a very small number of
arxiv +1 more source
Clinical commissioning of an adaptive radiotherapy platform: Results and recommendations
Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022 Abstract Online adaptive radiotherapy platforms present a unique challenge for commissioning as guidance is lacking and specialized adaptive equipment, such as deformable phantoms, are rare. We designed a novel adaptive commissioning process consisting of end‐to‐end tests using standard clinical resources.
Kelly Kisling +5 more
wiley +1 more source
Journal of the Mechanical Behavior of Materials, 2018 Active optics techniques on large telescopes and astronomical instrumentations provide high imaging quality. For ground-based astronomy, the co-addition of adaptive optics again increases angular resolution up to providing diffraction-limited imaging at ...
Lemaitre Gérard Rene
doaj +1 more source