The Determination of Molecular Spatial Orientation

2020 ◽  
pp. 141-172
Author(s):  
Francis M. Mirabella
Keyword(s):  
1988 ◽  
Vol 130 ◽  
pp. 239-241
Author(s):  
Piotr Flin

The alignment of galaxies with the main plane of supercluster can contribute to recovering information on the structure origin. The positive result of the preliminary search for galaxy alignment in the Local Supercluster /Flin and Godlowski 1986, hereafter FG/ have stimulated further studies. Following Jaaniste and Saar /1977/, the both parameters, the position angle of the galaxy major axis p and the axial ratio b/a of the galaxy image, were used for the better determination of the actual spatial orientation of the galaxy disc. This approach also permit to consider “face-on” objects, whose discounting leads to obvious incompleteness of the analysed data. Each galaxy has two possible orientations and both were taken into account during calculations. The analysis is perfomed by transforming position angle p and coordinates α, δ of galaxies expressed in the equatorial coordinates into coordinate system connected with each parent supercluster separately, which gives parameters P, l and b respectively. The main supercluster plane should be determined, which resticts the present study to the three superclusters with a known spatial geometry, i.e. LSC /Tully 1982/, Perseus and Coma/A1367 /Chincarini et al. 1983/.


2014 ◽  
Vol 21 (1) ◽  
pp. 107-116 ◽  
Author(s):  
Aleksander Nowak

AbstractThe European Geostationary Navigation Overlay Service (EGNOS) thanks to geostationary satellites covers an area of whole Europe, including Baltic and North Sea. It allows to fix the coordinates of object position with typical absolute accuracy of 1,5 m. Previous research have shown that relative accuracy is usually higher than absolute one [Nowak A., 2010; Nowak A., 2011], so probably it could be possible to use EGNOS to determine direction in space. The research described in the paper concerned relative accuracy of three homogeneous EGNOS receivers, in context of the ability to determine the ship’s hull spatial orientation. Theoretical basis, the process of the experiment and the results of recorded data analysis were described. The research were conducted in the summer of 2014. Three homogenous Leica Viva series receivers were used. They were configured to receive a differential messages of the EGNOS system. Recorded data were analyzed in context of fixes relative accuracy. On the basis of achieved results, a conclusion about the possibility of construction the measurement system for the automatic determination of the ship’s hull spatial orientation angles in real time was drawn. The further research directions were pointed out, too.


2001 ◽  
Vol 124 (1) ◽  
pp. 134-136
Author(s):  
B. C. E. Goris ◽  
M. Kuipers ◽  
J. De Vries ◽  
D. J. Wever ◽  
G. J. Verkerke ◽  
...  

In this paper we consider the spatial orientation of vertebrae. We take the view that, in determining their rotation angles from X-rays, the procedure applied by Drerup yields the most reliable empirical results, viz. the three angles through which a vertebra rotates about its own symmetry axes in a specific sequence. With a view to the further use of this information to analyze deformations or the motion of a spine we recommend that the Drerup angles be converted into the well-known Eulerian angles. How this can be done is the subject of this report.


1987 ◽  
Vol 81 (3) ◽  
pp. 118-119
Author(s):  
B. Wouters

Patients who are visually impaired because of brain damage often show a visuospatial syndrome characterized by disturbances of spatial orientation and determined behavior. The lesion may be located in the frontal cortex or in the right parietal cortex of the brain; recent research shows that the determination of spatial behavior is impaired. Emphasis in the rehabilitation of these patients should be shifted from perceptual to performance orientation. It is essential for the individual to gain insight into his or her specific impairment and for the professional to work cooperatively using the patient's own strategies.


Carbon ◽  
2015 ◽  
Vol 88 ◽  
pp. 215-224 ◽  
Author(s):  
Zheling Li ◽  
Robert J. Young ◽  
Ian A. Kinloch ◽  
Neil R. Wilson ◽  
Alexander J. Marsden ◽  
...  

2015 ◽  
Vol 61 (1) ◽  
pp. 89-102 ◽  
Author(s):  
O. I. Kordun

AbstractThe paper considers method of determination of solar radiation amount falling on arbitrarily oriented surface of a structure. Provided method allows calculation of influence of structure’s geographical coordinates, spatial orientation of structure’s surface, day of year and time of day on received amount of solar radiation. The method is intended for determination of thermal stresses and deformations of sheet steel structures caused by action of direct solar radiation. Examples show usage of provided method.


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