Results 61 to 70 of about 1,422 (172)

A New Strategy for Deep Wide-Field High Resolution Optical Imaging [PDF]

, 1999
We propose a new strategy for obtaining enhanced resolution (FWHM = 0.12 arcsec) deep optical images over a wide field of view. As is well known, this type of image quality can be obtained in principle simply by fast guiding on a small (D = 1.5m ...
Avila R., Barletti R., Barletti R., Chassat F., Coulman C. E., Coulman C. E., Cowie L. L., Disney M. J., Foy R., Fried D. L., Fried D. L., G. A. Luppino, J. L. Tonry, Jannuzi B. T., Johnston D. C., Martin F., N. Kaiser, Rocca A., Roddier F., Roddier F., Vernin J., Yee H. K. C.   +21 more
core   +2 more sources

Organic and Metallacages for Chemical Sensing: Progress in Water‐Compatible Systems

Advanced Sensor Research, Volume 5, Issue 3, March 2026.
Supramolecular cages function as three‐dimensional receptors for selective molecular recognition and sensing, and this review outlines design principles for water‐stable architectures, key analyte‐ and medium‐dependent challenges, recent water‐compatible examples (including polymer‐integrated systems), and future opportunities for cage‐based ...
Rabia Zahid, Martina Viola, Maria Vittoria Balli, Guillermo Moreno‐Alcántar, Pierre Picchetti   +4 more
wiley   +1 more source

Combining Correlative Cryogenic Fluorescence and Electron Microscopy and Correlative Cryogenic Super‐Resolution Fluorescence and X‐Ray Tomography—Novel Complementary 3D Cryo‐Microscopy Across Scales to Reveal Nanoparticle Internalization Into Cancer Cells

Microscopy Research and Technique, Volume 89, Issue 2, Page 260-272, February 2026.
A newly established 3D correlative cryogenic fluorescence microscopy, focused ion beam scanning electron microscopy, and soft x‐ray tomography workflow allowed for enough contrast and resolution to quantify the intracellular uptake of zirconyl‐containing inorganic–organic hybrid nanoparticles as a novel chemotherapeutic drug delivery system into ...
Pavitra Sokke Rudraiah, Louisa Herbsleb, Michaela Salakova, Henriette Gröger, Anna Maria Steyer, Frauke Alves, Claus Feldmann, Andreas Walter   +7 more
wiley   +1 more source

Coexistence of OTFS Modulation With OFDM-based Communication Systems

, 2023
This study examines the coexistence of orthogonal time-frequency space (OTFS) modulation with current fourth- and fifth-generation (4G/5G) wireless communication systems that primarily use orthogonal frequency-division multiplexing (OFDM) waveforms.
Fang, Yuting, Fitzpatrick, Paul, Sakurai, Taka, Shafie, Akram, Yuan, Jinhong   +4 more
core  

A comparison of super‐resolution microscopy techniques for imaging tightly packed microcolonies of an obligate intracellular bacterium

Journal of Microscopy, Volume 301, Issue 2, Page 187-205, February 2026.
Abstract Conventional optical microscopy imaging of obligate intracellular bacteria is hampered by the small size of bacterial cells, tight clustering exhibited by some bacterial species and challenges relating to labelling such as background from host cells, a lack of validated reagents, and a lack of tools for genetic manipulation.
Alison J. North, Ved P. Sharma, Christina Pyrgaki, John Lim S.Y., Sharanjeet Atwal, Kittirat Saharat, Graham D. Wright, Jeanne Salje   +7 more
wiley   +1 more source

The Chemistry of Subphthalocyanines: Synthetic Strategies for their Axial, Peripheral, and Remote Postfunctionalization

ChemistryEurope, Volume 4, Issue 1, January 2026.
From axial and peripheral reactivity to remote derivatization, the chemical versatility of subphthalocyanines (SubPcs) renders them ideal scaffolds for the design of advanced functional materials. This review assembles the synthetic toolbox, key reaction conditions, and future challenges in SubPc functionalization, guiding the development of next ...
Marta Gómez‐Gómez, Juan Laforga‐Martín, Jorge Labrador‐Santiago, Jorge Labella, Tomás Torres   +4 more
wiley   +1 more source

A Phase-Coded Time-Domain Interleaved OTFS Waveform with Improved Ambiguity Function

, 2023
Integrated sensing and communication (ISAC) is a significant application scenario in future wireless communication networks, and sensing capability of a waveform is always evaluated by the ambiguity function.
Chen, Yuhua, Tang, Yanqun, Xiong, Jiaojiao, Yang, Chao, Yin, Haoran, Zhang, Chi, Zhu, Jiajun   +6 more
core  

Orthogonal Time-Frequency-Space (OTFS) and Related Signaling

CoRR
The principle of orthogonal time-frequency-space (OTFS) signaling is firstly analyzed, followed by explaining that OTFS embeds another signaling scheme referred to as orthogonal short-time Fourier (OSTF). Then, the relationship among OTFS, OSTF, orthogonal frequency-division multiplexing (OFDM) and single-carrier frequency-division multiple-access (SC ...
openaire   +2 more sources

Reinforcement Learning for Robust Modulation Classification in Non‐Orthogonal Multiple Access (NOMA) Systems

IET Communications, Volume 20, Issue 1, January/December 2026.
This paper proposes a reinforcement learning–based framework for robust modulation classification and resource management in non‐orthogonal multiple access (NOMA) systems. By integrating Q‐learning, deep reinforcement learning, and proximal policy optimisation, the approach enhances spectral efficiency, mitigates interference, and improves ...
Mohammed M. Alammar, Abdulrahman Al Ayidh, Muneer Parayangat, Mohamed Abd Elhamid Abbas   +3 more
wiley   +1 more source

Jamming Suppression Via Resource Hopping in High-Mobility OTFS-SCMA Systems

, 2023
This letter studies the mechanism of uplink multiple access and jamming suppression in an OTFS system. Specifically, we propose a novel resource hopping mechanism for orthogonal time frequency space (OTFS) systems with delay or Doppler partitioned sparse
Deng, Qinwen, Ding, Zhi, Ge, Yao
core