Two computer programs for quantitative treatment of aeromagnetic data; Double Fourier Expansion Series expansion: part 1, program C71303; part 2, program C71304

1967 ◽  
Author(s):  
B K Bhattacharyya
Keyword(s):  
Series Expansion ◽  
Fourier Expansion ◽  
Computer Programs ◽  
Aeromagnetic Data ◽  
Expansion Series ◽  
Quantitative Treatment

Fatigue Life Prediction Due to Slug Flow in Extra Long Submarine Gas Pipelines Using Fourier Expansion Series

2009 ◽  
Author(s):  
Euro Casanova ◽  
Orlando Pelliccioni ◽  
Armando Blanco
Keyword(s):  
Fatigue Life ◽  
Dynamic Response ◽  
Slug Flow ◽  
Fourier Expansion ◽  
Time Integration ◽  
Computational Cost ◽  
Gas Production ◽  
Computational Time ◽  
Integration Scheme ◽  
Expansion Series

Some offshore gas production fields require transporting of production fluids through very long submarines pipelines, without a previous separation process. In these cases, a slug flow pattern may develop for some production conditions. Condensate slugs traveling in the pipeline, act as moving loads for the piping structure, especially for the unsupported pipe spans which can be of even hundreds of meters long, due to irregular sea bottom, therefore producing a dynamic response of the pipeline that in some cases may significantly reduce its fatigue life. In this work a previously presented model [1], which combines fluid equations for predicting slug characteristics and a structural finite element model of horizontal pipelines transporting slugs, is modified for reducing computational cost and to adapt fatigue life calculations to the case of submarine piping. In order to calculate maximum amplitudes of the dynamic response without a time integration scheme, it is considered that traveling slugs produce periodical loads in time for every spatial point of the pipeline, and consequently these loads may be expressed by means of Fourier expansion series. With these assumptions, a more realistic fatigue calculation for a diversity of pipelines conditions is obtained. Results show that for this improved model computational time is dramatically reduced, without a lost in precision, when compared to the previous model requiring a time integration process.

scholarly journals Processing and interpretation of aeromagnetic data in The Geological Survey of Greenland

1983 ◽  
Vol 114 ◽  
pp. 1-42
Author(s):  
L Thorning
Keyword(s):  
Computer Programs ◽  
Geological Survey ◽  
Magnetic Data ◽  
General Description ◽  
Aeromagnetic Data ◽  
Data Bases

This report gives a brief, general description of a system of computer programs for the processing, interpretation and presentation of mainly aeromagnetic data. The system consists of data bases for aeromagnetic and accessory data, programs for the correction and compilation of magnetic data, a contouring package with some special features and a package of interpretation programs.

scholarly journals A brief description of the computer programs used by GGU in the treatment of aeromagnetic data

1977 ◽  
Vol 85 ◽  
pp. 37-45
Author(s):  
L Thorning
Keyword(s):  
West Coast ◽  
Gradual Increase ◽  
Computer Programs ◽  
Aeromagnetic Data ◽  
Program System ◽  
Regional Survey ◽  
East Greenland ◽  
Close Cooperation ◽  
The Individual ◽  
Additional Support

Computer programs for the treatment of aeromagnetic data have been developed parallel to GGU's acquisition and compilation of basic aeromagnetic data. The first data were collected in East Greenland in 1974 (Larsen, 1975), followed in 1975 and 1976 by the systematic regional survey of parts ofthe west coast (Thorning, 1976; this report). The first programs of the system had been designed by the end of 1974 and since then there has been a gradual increase in the number of programs as well as in their effectiveness. The programs have been developed by K. Frellesvig, E. Kirsbo and P. Rasmussen of Geokon ApS in close cooperation with H. C. Larsen and the writer from GGU, with additional support from GGU's computer group. This note gives a status of the program system at the end of 1976 and will supply an easy reference for later publications on the aeromagnetic data. In the folIowing sections a brief description will be given of the hardware available to GGU and the individual programs and their interrelationship.

scholarly journals A New Method for the Determination of Texture Functions From Incomplete Pole Figures—Comparison With Older Methods

1984 ◽  
Vol 6 (2) ◽  
pp. 137-161 ◽  
Author(s):  
P. Van Houtte
Keyword(s):  
Texture Analysis ◽  
Series Expansion ◽  
Computer Programs ◽  
The Other ◽  
New Method ◽  
Other Hand ◽  
Pole Figures ◽  
Experimental Errors

Three series expansion methods for texture analysis from incomplete pole figures have been compared. Method I is the presently most used method, method II is a variant of it and method III is entirely new. Computer programs have been written for the three methods.Incomplete pole figures have then been prepared from known textures of f.c.c. metals. In some cases, artificial experimental errors have been simulated. These pole figures were analyzed by the three computer programs, after which the resulting texture functions were compared to the original texture functions.No significant differences were found for weak textures. On the other hand, the results of method I are much poorer than those of the two other methods for sharp textures, because it underestimates the normalisation factors.The best results were obtained by method III.

The Computational Sublime in Nick Montfort's ‘Round’ and ‘All the Names of God’

CounterText ◽  
2015 ◽  
Vol 1 (3) ◽  
pp. 348-365 ◽  
Author(s):  
Mario Aquilina
Keyword(s):  
Computer Code ◽  
Computer Programs ◽  
Literary Text ◽  
Text Generation ◽  
Mathematical Concepts ◽  
Literary Space

What if the post-literary also meant that which operates in a literary space (almost) devoid of language as we know it: for instance, a space in which language simply frames the literary or poetic rather than ‘containing’ it? What if the countertextual also meant the (en)countering of literary text with non-textual elements, such as mathematical concepts, or with texts that we would not normally think of as literary, such as computer code? This article addresses these issues in relation to Nick Montfort's #!, a 2014 print collection of poems that presents readers with the output of computer programs as well as the programs themselves, which are designed to operate on principles of text generation regulated by specific constraints. More specifically, it focuses on two works in the collection, ‘Round’ and ‘All the Names of God’, which are read in relation to the notions of the ‘computational sublime’ and the ‘event’.

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