scholarly journals Three-dimensional digital-computer model of the Ferron sandstone aquifer near Emery, Utah

1980 ◽  
Keyword(s):  
Computer Model ◽  
Digital Computer ◽  
Three Dimensional ◽  
Sandstone Aquifer

Animated visualization of a high resolution color three dimensional digital computer model of the whole human head

1993 ◽  
Vol 32 (1) ◽  
pp. 7-17 ◽  
Author(s):  
Sanjiv Narayan ◽  
Debjoti Sensharma ◽  
Emily M. Santori ◽  
Andrew A. Lee ◽  
Ameet Sabherwal ◽  
...  
Keyword(s):  
High Resolution ◽  
Computer Model ◽  
Digital Computer ◽  
Three Dimensional ◽  
Human Head

Solutions to the Vector Tetrahedron Equation

1965 ◽  
Vol 87 (2) ◽  
pp. 228-234 ◽  
Author(s):  
Milton A. Chace
Keyword(s):  
Closed Form ◽  
Digital Computer ◽  
Three Dimensional ◽  
Dimensional Vector ◽  
Spherical Coordinates ◽  
Tetrahedron Equation ◽  
Position Determination ◽  
Closed Form Solutions

A set of nine closed-form solutions are presented to the single, three-dimensional vector tetrahedron equation, sum of vectors equals zero. The set represents all possible combinations of unknown spherical coordinates among the vectors, assuming the coordinates are functionally independent. Optimum use is made of symmetry. The solutions are interpretable and can be evaluated reliably by digital computer in milliseconds. They have been successfully applied to position determination of many three-dimensional mechanisms.

scholarly journals Three dimensional elastic dynamic analysis of a 985 foot high freestanding communications tower

1975 ◽  
Vol 8 (3) ◽  
pp. 222-237
Author(s):  
J. Lord ◽  
M. Zayed
Keyword(s):  
San Francisco ◽  
Computer Model ◽  
Three Dimensional ◽  
Physical Structure ◽  
Design Development ◽  
Structural Configuration ◽  
Free Standing ◽  
Ground Shaking ◽  
Linear Elastic ◽  
Seismic Force

This paper reviews the design development of a 985' high free-standing communications tower recently constructed in San Francisco. Included is a description of the structural configuration of the
 tower and the criteria by which it was designed. The dynamic characteristics of a three-dimensional linear elastic mathematical computer model, devised to represent the physical structure, are presented. The dynamic response of this computer model to various levels of
ground shaking, including both horizontal and vertical excitations,
 are summarized, evaluated and compared to the seismic force levels prescribed by the 1969 edition of the San Francisco Building Code.
 Also included in the comparison are the responses derived for the tower from wind tunnel studies and static wind design criteria.

Digital Simulation of the Chemical Control of Ventilation

1973 ◽  
Vol 95 (3) ◽  
pp. 335-339
Author(s):  
H. T. Milhorn ◽  
W. J. Reynolds
Keyword(s):  
Computer Model ◽  
Respiratory System ◽  
Digital Computer ◽  
Chemical Control ◽  
Minute Ventilation ◽  
Digital Simulation ◽  
Transient Responses ◽  
O2 Concentration ◽  
Lower Oxygen ◽  
Series Of Experiments

Experimental human data, obtained for the development and evaluation of a digital computer model of the human respiratory system, are presented. The data are from two series of experiments. In the first series the transient responses of tidal volume, respiratory frequency, minute ventilation, alveolar Pco2 and alveolar Po2 were obtained for several inspired CO2 concentrations (3, 5, 6, and 7 percent). In the second series, transient responses of the same variables were obtained for steps of inspired O2 concentration from room air to several lower oxygen levels (9, 8, and 7 percent). An example of the use of the data for the development and evaluation of a model is indicated.

Sign in / Sign up

Export Citation Format

Share Document