The Experts below are selected from a list of 180 Experts worldwide ranked by ideXlab platform
G D Smith - One of the best experts on this subject based on the ideXlab platform.
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Difference Structure factor normalization for heavy atom or anomalous scattering subStructure determinations
Journal of Applied Crystallography, 1999Co-Authors: R H Blessing, G D SmithAbstract:Procedures are described for normalizing Structure-factor Difference magnitudes, |Δ|F||SIR = ||FDer| − |FNat|| ≤ |FHeavy| or |Δ|F||SAS = ||F+h| − |F−h|| ≤ 2|F′′|, to prepare data for probabilistic direct methods phasing to determine heavy-atom or anomalous-scattering subStructures in SIR (single-derivative isomorphous replacement) or SAS (single-wavelength anomalous scattering) cases. Applications of the procedures in several recent determinations of multi-selenium subStructures in selenomethionyl proteins via SnB direct-methods phasing are briefly summarized.
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Difference Structure‐factor normalization for heavy‐atom or anomalous‐scattering subStructure determinations
Journal of Applied Crystallography, 1999Co-Authors: R H Blessing, G D SmithAbstract:Procedures are described for normalizing Structure-factor Difference magnitudes, |Δ|F||SIR = ||FDer| − |FNat|| ≤ |FHeavy| or |Δ|F||SAS = ||F+h| − |F−h|| ≤ 2|F′′|, to prepare data for probabilistic direct methods phasing to determine heavy-atom or anomalous-scattering subStructures in SIR (single-derivative isomorphous replacement) or SAS (single-wavelength anomalous scattering) cases. Applications of the procedures in several recent determinations of multi-selenium subStructures in selenomethionyl proteins via SnB direct-methods phasing are briefly summarized.
Å. Nordlund - One of the best experts on this subject based on the ideXlab platform.
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Scaling Relations of Supersonic Turbulence in Molecular Clouds
Astrophysics and Space Science, 2004Co-Authors: S. Boldyrev, P. Padoan, R. Jimenez, Å. NordlundAbstract:We discuss a model for driven supersonic, super-Alfvénic MHD turbulence that is believed to govern the Structure of molecular clouds. Such turbulence is highly intermittent; we describe its statistical properties by obtaining scaling of velocity-Difference Structure functions. This scaling was analytically predicted in Boldyrev (2002), confirmed in numerical simulations by Boldyrev et al. (2002), and discovered in observations by Padoan et al. (2003).
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Scaling Relations of Supersonic Turbulence in Molecular Clouds
Astrophysics and Space Science, 2004Co-Authors: S. Boldyrev, P. Padoan, R. Jimenez, Å. NordlundAbstract:We discuss a model for driven supersonic, super-Alfvenic MHD turbulence that is believed to govern the Structure of molecular clouds. Such turbulence is highly intermittent; we describe its statistical properties by obtaining scaling of velocity-Difference Structure functions. This scaling was analytically predicted in Boldyrev (2002), confirmed in numerical simulations by Boldyrev et al. (2002), and discovered in observations by Padoan et al. (2003).
S. Boldyrev - One of the best experts on this subject based on the ideXlab platform.
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Scaling Relations of Supersonic Turbulence in Molecular Clouds
Astrophysics and Space Science, 2004Co-Authors: S. Boldyrev, P. Padoan, R. Jimenez, Å. NordlundAbstract:We discuss a model for driven supersonic, super-Alfvénic MHD turbulence that is believed to govern the Structure of molecular clouds. Such turbulence is highly intermittent; we describe its statistical properties by obtaining scaling of velocity-Difference Structure functions. This scaling was analytically predicted in Boldyrev (2002), confirmed in numerical simulations by Boldyrev et al. (2002), and discovered in observations by Padoan et al. (2003).
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Scaling Relations of Supersonic Turbulence in Molecular Clouds
Astrophysics and Space Science, 2004Co-Authors: S. Boldyrev, P. Padoan, R. Jimenez, Å. NordlundAbstract:We discuss a model for driven supersonic, super-Alfvenic MHD turbulence that is believed to govern the Structure of molecular clouds. Such turbulence is highly intermittent; we describe its statistical properties by obtaining scaling of velocity-Difference Structure functions. This scaling was analytically predicted in Boldyrev (2002), confirmed in numerical simulations by Boldyrev et al. (2002), and discovered in observations by Padoan et al. (2003).
R H Blessing - One of the best experts on this subject based on the ideXlab platform.
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Difference Structure factor normalization for heavy atom or anomalous scattering subStructure determinations
Journal of Applied Crystallography, 1999Co-Authors: R H Blessing, G D SmithAbstract:Procedures are described for normalizing Structure-factor Difference magnitudes, |Δ|F||SIR = ||FDer| − |FNat|| ≤ |FHeavy| or |Δ|F||SAS = ||F+h| − |F−h|| ≤ 2|F′′|, to prepare data for probabilistic direct methods phasing to determine heavy-atom or anomalous-scattering subStructures in SIR (single-derivative isomorphous replacement) or SAS (single-wavelength anomalous scattering) cases. Applications of the procedures in several recent determinations of multi-selenium subStructures in selenomethionyl proteins via SnB direct-methods phasing are briefly summarized.
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Difference Structure‐factor normalization for heavy‐atom or anomalous‐scattering subStructure determinations
Journal of Applied Crystallography, 1999Co-Authors: R H Blessing, G D SmithAbstract:Procedures are described for normalizing Structure-factor Difference magnitudes, |Δ|F||SIR = ||FDer| − |FNat|| ≤ |FHeavy| or |Δ|F||SAS = ||F+h| − |F−h|| ≤ 2|F′′|, to prepare data for probabilistic direct methods phasing to determine heavy-atom or anomalous-scattering subStructures in SIR (single-derivative isomorphous replacement) or SAS (single-wavelength anomalous scattering) cases. Applications of the procedures in several recent determinations of multi-selenium subStructures in selenomethionyl proteins via SnB direct-methods phasing are briefly summarized.
Qiwei Song - One of the best experts on this subject based on the ideXlab platform.
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90 and 180 phase shifter using an arbitrary phase Difference coupled line Structure
IEICE Electronics Express, 2017Co-Authors: Yezi Dong, Qiwei SongAbstract:In this paper, an arbitrary phase-Difference Structure using short-circuit stubs and coupled-line with weak coupling is presented. Compared with conventional coupled-line phase shifters, the proposed coupled-line configuration covers a wide phase range over a broad band. The simulation exhibits a phase range from 15 degrees to 180 degrees. To verified the configuration, 90 degrees and 180 degrees phase shifters are fabricated and measured. According to the measurement results, both 90 degrees and 180 degrees phase shifters achieve bandwidths over 60% with in-band performance of return loss greater than 10 dB, insertion loss less than 1 dB, and phase deviation less than +/- 5 degrees.
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90° and 180° phase shifter using an arbitrary phase-Difference coupled-line Structure
IEICE Electronics Express, 2017Co-Authors: Yezi Dong, Qiwei SongAbstract:In this paper, an arbitrary phase-Difference Structure using short-circuit stubs and coupled-line with weak coupling is presented. Compared with conventional coupled-line phase shifters, the proposed coupled-line configuration covers a wide phase range over a broad band. The simulation exhibits a phase range from 15 degrees to 180 degrees. To verified the configuration, 90 degrees and 180 degrees phase shifters are fabricated and measured. According to the measurement results, both 90 degrees and 180 degrees phase shifters achieve bandwidths over 60% with in-band performance of return loss greater than 10 dB, insertion loss less than 1 dB, and phase deviation less than +/- 5 degrees.