scholarly journals Approaches to Accuracy Improvement of GNSS Independent Determination of Position Data of Emergency Radio Beacons in the Medium Earth Orbit Segment of the COSPAS–SARSAT System

2017 ◽  
Vol 3 ◽  
pp. 77-86
Author(s):  
V. A. Arkhangel’skiy ◽  
◽  
V.V. Seleznev ◽  
Keyword(s):  
Earth Orbit ◽  
Accuracy Improvement ◽  
Independent Determination ◽  
Position Data ◽  
Orbit Segment

scholarly journals Model-Independent Determination of the Spin of the Ω− and Its Polarization Alignment in ψ(3686)→Ω−Ω¯+

2021 ◽  
Vol 126 (9) ◽  
Author(s):  
M. Ablikim ◽  
M. N. Achasov ◽  
P. Adlarson ◽  
S. Ahmed ◽  
M. Albrecht ◽  
...  
Keyword(s):  
Independent Determination ◽  
Model Independent

scholarly journals A METHOD FOR THE INDEPENDENT DETERMINATION OF CYSTEINE AND CYSTINE IN PROTEINS

1954 ◽  
Vol 207 (2) ◽  
pp. 903-910
Author(s):  
R.D. Strickland ◽  
E.L. Martin ◽  
J.L. Riebsomer
Keyword(s):  
Independent Determination

On the three-dimensional structure and catalytic mechanism of triose phosphate isomerase

1981 ◽  
Vol 293 (1063) ◽  
pp. 159-171 ◽  
Keyword(s):  
Catalytic Mechanism ◽  
Polypeptide Chain ◽  
Three Dimensional ◽  
Triose Phosphate Isomerase ◽  
Dimensional Structure ◽  
Dihydroxyacetone Phosphate ◽  
Triose Phosphate ◽  
Independent Determination ◽  
Chicken Muscle

Triose phosphate isomerase is a dimeric enzyme of molecular mass 56000 which catalyses the interconversion of dihydroxyacetone phosphate (DHAP) and D-glyceraldehyde-3-phosphate. The crystal structure of the enzyme from chicken muscle has been determined at a resolution of 2.5 A, and an independent determination of the structure of the yeast enzyme has just been completed at 3 A resolution. The conformation of the polypeptide chain is essentially identical in the two structures, and consists of an inner cylinder of eight strands of parallel |3-pleated sheet, with mostly helical segments connecting each strand. The active site is a pocket containing glutamic acid 165, which is believed to act as a base in the reaction. Crystallographic studies of the binding of DHAP to both the chicken and the yeast enzymes reveal a common mode of binding and suggest a mechanism for catalysis involving polarization of the substrate carbonyl group.

Model independent determination of GEn from the reaction

1988 ◽  
Vol 206 (2) ◽  
pp. 187-189 ◽  
Author(s):  
E.L. Tomusiak ◽  
H. Arenhövel
Keyword(s):  
Independent Determination ◽  
Model Independent

scholarly journals Accuracy improvement in XRF analysis for the quantification of elements ranging from tenths to thousands μg g−1 in human tissues using different matrix reference materials

2020 ◽  
Vol 35 (12) ◽  
pp. 2920-2927
Author(s):  
Jorge Machado ◽  
Patrícia Miguel Carvalho ◽  
Ana Félix ◽  
Delfin Doutel ◽  
José Paulo Santos ◽  
...  
Keyword(s):  
Quantitative Determination ◽  
Reference Materials ◽  
Fluorescence Spectrometry ◽  
Human Tissues ◽  
Accuracy Improvement ◽  
External Calibration ◽  
X Ray ◽  
Xrf Analysis ◽  
Calibration Approach

In this work, we aim at achieving the most accurate quantitative determination of elements in human tissues by means of X-ray fluorescence spectrometry using the external calibration approach.

scholarly journals An empirical method for absolute calibration of coccolith thickness

2017 ◽  
Author(s):  
Saúl González-Lemos ◽  
José Guitián ◽  
Miguel-Ángel Fuertes ◽  
José-Abel Flores ◽  
Heather M. Stoll
Keyword(s):  
Laboratory Data ◽  
Polarized Light ◽  
Empirical Method ◽  
Absolute Calibration ◽  
Light Spectra ◽  
Independent Determination ◽  
Data Comparability ◽  
Calibration Materials ◽  
Constant Slope

Abstract. As major calcifiers in the open ocean, coccolithophores play a key role in the marine carbon cycle. Because they may be sensitive to changing CO2 and ocean acidification, there is significant interest in quantifying past and present variations in their cellular calcification by quantifying the thickness of the coccoliths or calcite plates that cover their cells. Polarized light microscopy has emerged as a key tool for quantifying the thickness of these calcite plates, but the reproducibility and accuracy of such determinations has been limited by the absence of suitable calibration materials in the thickness range of coccoliths (0–4 microns). Here, we describe the fabrication of a calcite wedge with a constant slope over 15 this thickness range, and the independent determination of calcite thickness along the wedge profile. We show how the calcite wedge provides more robust calibrations in the 0 to 1.55 μm range than previous approaches using rhabdoliths. We show the particular advantages of the calcite wedge approach for developing equations to relate thickness to the interference colors that arise in calcite in the thickness range between 1.55 and 4 μm. The calcite wedge approach can be applied to develop equations relevant to the particular light spectra and intensity of any polarized light microscope system and could significantly improve within and inter-laboratory data comparability.

Model-independent determination of the degree of charge transfer in molecular and metal complexes

2015 ◽  
Vol 51 (81) ◽  
pp. 15071-15074 ◽  
Author(s):  
Bora Joo ◽  
Eung-Gun Kim
Keyword(s):  
Charge Transfer ◽  
Metal Complexes ◽  
Active Space ◽  
Model Free ◽  
Independent Determination ◽  
Charge Analysis ◽  
Model Independent ◽  
Degree Of Charge Transfer

Choosing a small active space of electrons for charge analysis allows the model-free determination of the degree of charge transfer.

scholarly journals Orbit Propagation and Determination of Low Earth Orbit Satellites

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
Ho-Nien Shou
Keyword(s):  
Kalman Filter ◽  
Real Time ◽  
Unscented Kalman Filter ◽  
Estimation Method ◽  
Nonlinear Problems ◽  
Low Earth Orbit ◽  
Earth Orbit ◽  
Positioning Accuracy ◽  
Orbit Propagation

This paper represents orbit propagation and determination of low Earth orbit (LEO) satellites. Satellite global positioning system (GPS) configured receiver provides position and velocity measures by navigating filter to get the coordinates of the orbit propagation (OP). The main contradictions in real-time orbit which is determined by the problem are orbit positioning accuracy and the amount of calculating two indicators. This paper is dedicated to solving the problem of tradeoffs. To plan to use a nonlinear filtering method for immediate orbit tasks requires more precise satellite orbit state parameters in a short time. Although the traditional extended Kalman filter (EKF) method is widely used, its linear approximation of the drawbacks in dealing with nonlinear problems was especially evident, without compromising Kalman filter (unscented Kalman Filter, UKF). As a new nonlinear estimation method, it is measured at the estimated measurements on more and more applications. This paper will be the first study on UKF microsatellites in LEO orbit in real time, trying to explore the real-time precision orbit determination techniques. Through the preliminary simulation results, they show that, based on orbit mission requirements and conditions using UKF, they can satisfy the positioning accuracy and compute two indicators.

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