Standard apparatus for frequency reproduction and laser certification at a wavelength of 0.633 Μm

1982 ◽  
Vol 25 (3) ◽  
pp. 219-220
Author(s):  
Yu. G. Zakharenko ◽  
A. V. Kotkov ◽  
N. A. Mel'nikov
Keyword(s):  
Standard Apparatus ◽  
Frequency Reproduction

scholarly journals Diffuse-Field Equalisation of Binaural Ambisonic Rendering

2018 ◽  
Vol 8 (10) ◽  
pp. 1956 ◽  
Author(s):  
Thomas McKenzie ◽  
Damian Murphy ◽  
Gavin Kearney
Keyword(s):  
Virtual Reality ◽  
Frequency Response ◽  
Sound Source ◽  
High Frequency ◽  
Sagittal Plane ◽  
Impulse Responses ◽  
Spectral Difference ◽  
High Frequencies ◽  
Listening Tests ◽  
Frequency Reproduction

Ambisonics has enjoyed a recent resurgence in popularity due to virtual reality applications. Low order Ambisonic reproduction is inherently inaccurate at high frequencies, which causes poor timbre and height localisation. Diffuse-Field Equalisation (DFE), the theory of removing direction-independent frequency response, is applied to binaural (over headphones) Ambisonic rendering to address high-frequency reproduction. DFE of Ambisonics is evaluated by comparing binaural Ambisonic rendering to direct convolution via head-related impulse responses (HRIRs) in three ways: spectral difference, predicted sagittal plane localisation and perceptual listening tests on timbre. Results show DFE successfully improves frequency reproduction of binaural Ambisonic rendering for the majority of sound source locations, as well as the limitations of the technique, and set the basis for further research in the field.

Notes and Correspondence- Committee on Standard Apparatus

1925 ◽  
Vol 17 (6) ◽  
pp. 654-654
Author(s):  
W Collins ◽  
W Boughton ◽  
H Howe ◽  
F Smither ◽  
G Spencer ◽  
...  
Keyword(s):  
Standard Apparatus

scholarly journals Efficient molecular dynamics using geodesic integration and solvent–solute splitting

2016 ◽  
Vol 472 (2189) ◽  
pp. 20160138 ◽  
Author(s):  
Benedict Leimkuhler ◽  
Charles Matthews
Keyword(s):  
Molecular Dynamics ◽  
Geodesic Flow ◽  
Integration Method ◽  
Langevin Dynamics ◽  
Holonomic Constraints ◽  
Standard Apparatus ◽  
High Sampling ◽  
Order Of Magnitude ◽  
Diffusion Rates ◽  
Simulation Codes

We present an approach to Langevin dynamics in the presence of holonomic constraints based on decomposition of the system into components representing geodesic flow, constrained impulse and constrained diffusion. We show that a particular ordering of the components results in an integrator that is an order of magnitude more accurate for configurational averages than existing alternatives. Moreover, by combining the geodesic integration method with a solvent–solute force splitting, we demonstrate that stepsizes of at least 8 fs can be used for solvated biomolecules with high sampling accuracy and without substantially altering diffusion rates, approximately increasing by a factor of two the efficiency of molecular dynamics sampling for such systems. The methods described in this article are easily implemented using the standard apparatus of modern simulation codes.

Standard apparatus for measuring electromagnetic fields in the 300 Hz-1000 MHz band

1992 ◽  
Vol 35 (10) ◽  
pp. 1195-1197
Author(s):  
V. A. Tishchenko ◽  
L. V. Vasenkov ◽  
V. I. Tokatly
Keyword(s):  
Electromagnetic Fields ◽  
Standard Apparatus
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