Results 221 to 230 of about 264,735 (274)

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

Large Anomalous and Topological Hall Effect and Nernst Effect in a Dirac Kagome Magnet Fe3Ge

Advanced Functional Materials, EarlyView.
Fe3Ge, a Kagome‐lattice magnet, exhibits remarkable anomalous Hall and Nernst effects, with transverse thermoelectric conductivity surpassing or comaprable to some well‐known ferromagnets. First‐principles calculations attribute these to Berry curvature from massive Dirac gaps. Additionally, topological Hall and Nernst signals emerge from field‐induced
Chunqiang Xu, Shuvankar Gupta, Hengxin Tan, Hyeonhu Bae, Olajumoke Oluwatobiloba Emmanuel, Mingyu Xu, Yan Wu, Xiaofeng Xu, Pengpeng Zhang, Weiwei Xie, Binghai Yan, Xianglin Ke   +11 more
wiley   +1 more source

Determination of the angular spread of the x-ray beam from the I. S. C. (70-Mev) synchrotron

, 1955
Guveren M. Anderson, D. J. Zaffarano
openalex   +1 more source

Temporal and angular spreading of blue-green pulses in clouds

Applied Optics, 1982
The first blue-green laser propagation measurements through clouds that simulate the geometry of a satellite-to-ground communication link were made. The time history of large diameter (approximately 6-km) pulses illuminating cloud tops was recorded as a function of receiver field of view (FOV). The maximum pulse stretching observed for nanosecond laser
G C, Mooradian, M, Geller
openaire   +3 more sources

Impact of angular spread on massive MIMO channel estimation

2016 19th International Conference on Computer and Information Technology (ICCIT), 2016
Large scale antenna arrays technology has the potential of bringing many advantages to future wireless systems. Energy and spectral efficiency are going to be the most important features. Hence, accurate estimate of channel state information (CSI) makes these advantages achievable.
Ahmed Alshammari, Saleh Albdran, Md. Atiqur Rahman Ahad, Mohammad Matin   +3 more
openaire   +2 more sources

Some of the next articles are maybe not open access.

Related searches:

Efficient detection in the presence of angular spreading

IEEE International Conference on Acoustics Speech and Signal Processing, 2002
The spatial channel in applications such as radar, sonar, and wireless communications is typically characterized by complex signal scattering leading to multiple signal components arriving at the array from a spread of angles. This multipath angle spread is well known to lead to loss of spatial signal coherence across a receiving sensor array ...
null Rao, null Jones
openaire   +2 more sources

Angular variation of fire rate of spread

International Journal of Wildland Fire, 2013
Laboratory fire tests were performed in still air, for variable inclinations (10°, 15°) and fuel bed dimensions (1.28 × 2.50–3.0 × 4.6 m2), with homogeneous fuel beds of pine needles and pine wood excelsior. The fire ignition was made at a point, along a closed line with no fuel inside and along a straight edge of the fuel bed.
André, Jorge C. S., Goncalves, J. C., Vaz, Gilberto C., Viegas, Domingos X.   +3 more
openaire   +3 more sources

The Angular and Lateral Spread of Cosmic-Ray Showers

Physical Review, 1949
The mean square angular and lateral spreads in showers have been evaluated for electrons as well as photons as functions of their energy. Analytical expressions have been obtained for high and medium energies down to the critical shower energy. The calculations have been extended by numerical methods for air down to low energies (\ensuremath{\sim}4 Mev)
Roberg, Jane, Nordheim, L. W.
openaire   +2 more sources

Angular Spread and Density Function of Spherical Waves

2018 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting, 2018
Field sensors and actuators such as loudspeakers, microphones and antennas have their response functions, or patterns, expressed in spherical coordinates. The patterns lead to basic parameters such as directivity, radiation efficiency, and even bandwidth. Such patterns are also used for describing the incoming wave distribution.
Maryam Dehghani Estarki, Rodney G. Vaughan   +1 more
openaire   +1 more source

Angular spread at 2.1 GHz while entering tunnels

Microwave and Optical Technology Letters, 2003
AbstractPropagation characteristics while entering tunnels are analyzed by using a ray‐launching technique and the uniform theory of diffraction (UTD). RMS angular spread is studied and related to the “excitation zone.” This paper presents interesting differences in the behavior of this parameter and the RMS delay spread. © 2003 Wiley Periodicals, Inc.
José María Molina García‐Pardo, José Victor Rodríguez Rodríguez, Leandro Juan‐Llácer   +2 more
openaire   +1 more source