C-Band Simulations of Melting Icebergs Using GRECOSAR and an EM Model: Varying Wind Conditions at Lower Beam Mode

2019 ◽  
Vol 12 (12) ◽  
pp. 5134-5146 ◽  
Author(s):  
Md S. Ferdous ◽  
Umma H. Himi ◽  
Peter McGuire ◽  
Desmond T. Power ◽  
Thomas Johnson ◽  
...  
Keyword(s):  
Lower Beam ◽  
Beam Mode

scholarly journals The Breakthrough Listen search for intelligent life: Wide-bandwidth digital instrumentation for the CSIRO Parkes 64-m telescope

2018 ◽  
Vol 35 ◽  
Author(s):  
Danny C. Price ◽  
David H. E. MacMahon ◽  
Matt Lebofsky ◽  
Steve Croft ◽  
David DeBoer ◽  
...  
Keyword(s):  
New South ◽  
Recording System ◽  
Ultra Wideband ◽  
Digital Data ◽  
Single Beam ◽  
Digital Instrumentation ◽  
South Wales ◽  
Optical Wavelengths ◽  
Performance Results ◽  
Beam Mode

AbstractBreakthrough Listen is a 10-yr initiative to search for signatures of technologies created by extraterrestrial civilisations at radio and optical wavelengths. Here, we detail the digital data recording system deployed for Breakthrough Listen observations at the 64-m aperture CSIRO Parkes Telescope in New South Wales, Australia. The recording system currently implements two modes: a dual-polarisation, 1.125-GHz bandwidth mode for single-beam observations, and a 26-input, 308-MHz bandwidth mode for the 21-cm multibeam receiver. The system is also designed to support a 3-GHz single-beam mode for the forthcoming Parkes ultra-wideband feed. In this paper, we present details of the system architecture, provide an overview of hardware and software, and present initial performance results.

scholarly journals Progress In Design and Applications Of CCD Cameras For Electron Microscopy

1995 ◽  
Vol 3 (10) ◽  
pp. 12-13 ◽  
Author(s):  
Kenneth H. Downing
Keyword(s):  
High Sensitivity ◽  
Ccd Cameras ◽  
Video Cameras ◽  
Quantum Leap ◽  
Fluorescent Screen ◽  
Lower Beam ◽  
Video Systems ◽  
On Line ◽  
Specimen Quality ◽  
Electron Microscopes

Over the last several years the long-awaited revolution in direct-digital readout systems has begun, with the introduction of efficient slow-scan CCD cameras. Earlier, the introduction of video cameras to electron microscopes had brought a quantum leap in the speed and efficiency of carrying out a host of operations. The high sensitivity of the video cameras provided the ability to see the image in much more detail and at a lower beam intensity than had been previously possible by viewing the fluorescent screen. The ability to assess, on line, characteristics such as specimen quality and image focus, even qualitatively, gave feedback to the operator that previously took hours to obtain. Due to the low resolution of these video systems, however, they were rarely useful for data recording.

scholarly journals The Effect of Ions on the Symmetrical Throbbing Beam Mode

1969 ◽  
Vol 16 (3) ◽  
pp. 180-181 ◽  
Author(s):  
H. G. Hereward ◽  
P. L. Morton ◽  
K. H. Schindl
Keyword(s):  
Beam Mode

scholarly journals Beam Mode Expansion of Corrugated Conical Horns with Phase Correcting Lens: Application to Radioastronomy Receivers

2003 ◽  
Vol 15 (3) ◽  
pp. 173-193 ◽  
Author(s):  
E. García ◽  
L. De Haro ◽  
C. O'Sullivan ◽  
G. Cahill ◽  
J. A. López Fernández ◽  
...  
Keyword(s):  
Mode Expansion ◽  
Beam Mode

Investigation of the interphase interaction at the interface in the Ti-C system with domestic titanium alloys of the a + β and pseudo a classes

2020 ◽  
Vol 5 ◽  
pp. 75-81
Author(s):  
D.V. Sidorov ◽  
◽  
V.M. Serpova ◽  
A.V. Zavodov ◽  
A.A. Shavnev ◽  
...  
Keyword(s):  
Titanium Alloys ◽  
Reaction Layer ◽  
Chemical Interaction ◽  
Ti Alloy ◽  
Interphase Interaction ◽  
Alloy Type ◽  
Small Crystals ◽  
Alloy Vt20 ◽  
Vt20 Alloy ◽  
Beam Mode

Interaction of the Ti-C with titanium alloys of a + β and pseudo a classes and formation of the reaction layer at the interface have been investigated. We used titanium a + b alloys VT6 (Ti-Al-V) and VT8 (Ti-Al-Mo-Si) as well as pseudo a alloy VT20 (Ti-Al-Zr-Mo-V). The structure and composition of the interfaces were investigated by means of TEM in the scanning beam mode and energy dispersive spectroscopy. It is ascertained that already at the stage of production of the samples by thermal diffusion joining, interphase chemical interaction and formation of the reaction layers occurred. The reaction layer consists of distinct regions of small crystals (nanocrystals TiC of 10-50 nm in size) and large grains of Ti8C5 of 100-500 nm in size. Most of the reaction layer consists of large grains ofTi8C5. It was found that the average thickness of the reaction layer varies depending on the Ti alloy type and is ~0.89 μm (VT6 alloy), ~0.97 μm (VT8 alloy), and ~0.51 μm (VT20 alloy). Additional heat treatment of the samples leads to increasing the thickness of the reaction layer in all Ti-C/Ti alloy systems due to the growth of large grains of titanium carbide.

Machine learning to distinguish natural and anthropic oil slicks: classification model and the Radarsat-2 beam mode effects

2020 ◽  
Vol 20 (2020) ◽  
pp. 458-459
Author(s):  
Sarah Barrón Torres ◽  
Italo de Oliveira Matias ◽  
Gustavo Robichez ◽  
Gil Marcio Avelino Silva ◽  
Fernando Pellon De Miranda ◽  
...  
Keyword(s):  
Machine Learning ◽  
Classification Model ◽  
Mode Effects ◽  
Beam Mode

Free and Forced Vibration of a Kinked Cantilever Beam

1999 ◽  
Author(s):  
B. S. Reddy ◽  
K. R. Y. Simha ◽  
A. Ghosal
Keyword(s):  
Cantilever Beam ◽  
Mode Shape ◽  
Forced Vibration ◽  
Equations Of Motion ◽  
Element Formulation ◽  
Kink Angle ◽  
Order Polynomial ◽  
Relationship Of ◽  
Tip Mass ◽  
Beam Mode

Abstract In this paper we use the assumed modes method to derive an analytical model of a kinked cantilever beam of unit mass carrying a kink mass (mk) and a tip mass (mt). The model is used to study the free and forced vibration of such a beam. For the free vibration, we obtain the mode shape of the complete beam by solving an eight order polynomial whose coefficients are functions of the kink mass, kink angle and tip mass. A relationship of the form f(mk,mt,δ)=mk+mt(4+103cosδ+23cos2δ)=constant appears to give the same fundamental frequency for a given kink angle, δ, and different combinations of kink mass and tip mass. To derive the dynamic equations of motion, the complete kinked beam mode shape is used in a Lagrangian formulation. The equations of motion are numerically integrated with a torque applied at the base and the tip response for various kink angles are presented. The results match those obtained from a traditional finite element formulation.

Research on Superposition Characteristics of Singularity Beam Mode

2020 ◽  
Vol 57 (19) ◽  
pp. 192601
Author(s):  
黄慧 Huang Hui ◽  
寿倩 Shou Qian ◽  
陈志超 Chen Zhichao
Keyword(s):  
Beam Mode
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