Results 61 to 70 of about 657,845 (275)

A Wideband, Four-Element, All-Digital Beamforming System for Dense Aperture Arrays in Radio Astronomy [PDF]

, 2010
Densely-packed, all-digital aperture arrays form a key area of technology development required for the Square Kilometre Array (SKA) radio telescope. The design of real-time signal processing systems for digital aperture arrays is currently a central ...
Adami, Kristian Zarb, Armstrong, Richard P., Jones, Mike E.   +2 more
core  

Phasing rectangular apertures

Optics Express, 2009
Several techniques have been developed to phase apertures in the context of astronomical telescopes with segmented mirrors. Phasing multiple apertures, however, is important in a wide range of optical applications. The application of primary interest in this paper is the phasing of multiple short pulse laser beams for fast ignition fusion experiments ...
K L, Baker, D, Homoelle, E, Utterback, S M, Jones   +3 more
openaire   +2 more sources

Near‐Infrared Emitting Lanthanide Catecholate Giant Single Crystals – Morphology Control and Photon Down‐Conversion

Advanced Functional Materials, EarlyView.
Controlled syntheses of lanthanide coordination polymers based on the dihydroxybenzoquinone (DHBQ) organic linker afforded large single crystals of Ln‐DHBQ CPs (Ln = Yb, Nd). A novel structural variant of Yb‐DHBQ is identified by means of single crystal diffraction analysis.
Marina I. Schönherr, Alexander Biewald, Andre Mähringer, Thaddäus J. Koller, Peter Mayer, Markus Döblinger, Achim Hartschuh, Dana D. Medina   +7 more
wiley   +1 more source

Galaxy-galaxy(-galaxy) lensing as a sensitive probe of galaxy evolution

, 2012
The gravitational lensing effect provides various ways to study the mass environment of galaxies. We investigate how galaxy-galaxy(-galaxy) lensing can be used to test models of galaxy formation and evolution.
Adelman-McCarthy, Bardeen, Bartelmann, Bett, Bower, Brainerd, Colless, Cooray, Crittenden, Croton, de la Torre, De Lucia, Dekel, Font, Frigo, Gladders, Guo, H. Saghiha, Hilbert, Hoekstra, Jullo, Kaiser, Kauffmann, Kim, Kleinheinrich, Le Fèvre, Li, Mandelbaum, Mandelbaum, McBride, Mo, P. Schneider, P. Simon, S. Hilbert, Schneider, Schneider, Schneider, Schneider, Schneider, Simon, Simon, Springel, Springel, Strateva, van Uitert, van Waerbeke, White   +46 more
core   +1 more source

Modulating Electrochemical CO2 Reduction Pathways via Interfacial Electric Field

Advanced Functional Materials, EarlyView.
Engineering interfacial electric fields in Cu/ITO electrodes enables precise control of CO2 reduction pathways. Charge transfer from Cu to ITO generates positively charged Cu species that steer selectivity from ethylene toward methane. This work demonstrates how interfacial electric‐field modulation can direct reaction intermediates and transform ...
Mahdi Salehi, Zhengyuan Gao, Sai Phani Kumar Vangala, Amirhossein Farzi, Hamed Heidarpour, Morgan McKee, Nikolay Kornienko, Ali Seifitokaldani   +7 more
wiley   +1 more source

Positive‐Tone Nanolithography of Antimony Trisulfide with Femtosecond Laser Wet‐Etching

Advanced Functional Materials, EarlyView.
A butyldithiocarbamic acid (BDCA) etchant is used to fabricate various micro‐ and nanoscale structures on amorphous antimony trisulfide (a‐Sb2S3) thin film via femtosecond laser etching. Numerical analysis and experimental results elucidate the patterning mechanism on gold (reflective) and quartz (transmissive) substrates.
Abhrodeep Dey, Uwe Hübner, Albane Benardais, Xiaofei Wu, Andrea Dellith, Jan Dellith, Torsten Wieduwilt, Henrik Schneidewind, Markus A Schmidt, Virginie Nazabal, Volker Deckert, Jer‐Shing Huang, Wei Wang   +12 more
wiley   +1 more source

Photoswitching Conduction in Framework Materials

Advanced Functional Materials, EarlyView.
This mini‐review summarizes recent advances in state‐of‐the‐art proton and electron conduction in framework materials that can be remotely and reversibly switched on and off by light. It discusses the various photoswitching conduction mechanisms and the strategies employed to enhance photoswitched conductivity.
Helmy Pacheco Hernandez, Stefan Hecht, Wolfgang Wenzel, Lars Heinke, Mariana Kozlowska   +4 more
wiley   +1 more source

Bimanual Reach to Grasp Movements in Youth With and Without Autism Spectrum Disorder

Frontiers in Psychology, 2019
Reaching and grasping (prehension) is one of the earliest developing motor skills in humans, but continued prehension development in childhood and adolescence enables the performance of increasingly complex manual tasks.
Rachel A. Rodgers, Brittany G. Travers, Andrea H. Mason   +2 more
doaj   +1 more source

Complexity of Polarized Spatial Patterns in Large Area Square VCSEL [PDF]

, 2007
We consider pattern selection process in a wide aperture VCSEL near threshold. We show that for a square geometry of the laser aperture, the patterns formed at lasing threshold can be very complicated because of a possible misalignment between directions
Ackemann, T., Babushkin, I. V., Loiko, N. A.   +2 more
core   +1 more source

Periodic aperture imaging

Optical Engineering, 2017
We studied periodic aperture imaging with various subaperture configurations in terms of their point spread functions, optical transfer functions, and imaging quality. A circular-shaped unit cell provides the best performance compared to square- and cross-shaped unit cells when the total aperture size and collection area are kept the same.
Alici, Kamil B., Buyuk, Hakan, Yilmaz, A. Serdar, Ozdemir, Ceyda, Karci, Ozgur, Oktem, Figen S., Selimoglu, Ozgur   +6 more
openaire   +2 more sources