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The generalized cross-product of vectors
(Polytechnic University of Puerto Rico, 1993-12)
The meaning of the scalar product of two vectors can be easily extended to a space of n dimensions. Similar generalization, related to the cross-product of vectors with more than three components, has not been formulated ...
On the thermodynamic consistency of the symmetric Poisson-Boltzmann equation in primitive model electrolytes
(Polytechnic University of Puerto Rico, 1991-06)
The study of electrolyte solutions poses several interesting features and
challenges. Their study is important, not only theoretically but for practical
reasons. Transport processes occur within the body as ionic ...
Hadamard matrices, strongly regular graphs, and Galois fields
(Polytechnic University of Puerto Rico, 1994-06)
In this paper the author uses the concept of circulant matrices and the superposition principle to find, from the adjacency matrices of three regular graphs of order 8 and degree 2, tire adjacency matrix, M, of a strongly ...
Retículos cúbicos, ortomodulares, conexos, de altura 3 y configuraciones proyectivas ortomodulares conexas
(Polytechnic University of Puerto Rico, 1994-12)
Cubic orthomodular connected lattices of height 3 and orthomodular connected projective configurations
The construction of a connected orthomodular projective configuration, from a cubic, connected, orthomodular lattice ...
Notas preliminares sobre el rol de la educación tecnológica en el mundo moderno
(Polytechnic University of Puerto Rico, 1991-06)
El preparar estudiantes para una ocupación u oficio en la industria
moderna requiere, al presente, un programa educativo que incluya todos los
elementos de una alta tecnología tanto en la teoría como en la práctica. ...
Design and analysis of multi-section eccentric shaft
(Polytechnic University of Puerto Rico, 1996-12)
In this report the preliminary design and analysis of multi-section eccentric shaft to be used on four-rotor Wankel rotary engine is discussed. Only a static analysis was performed due to time constraints. This novel design ...
Determination of soil strength parameters from unconfined compression testing on partially saturated soils
(Polytechnic University of Puerto Rico, 1996-12)
The uneonfined compression test is used in most geotechnical studies to y -determine soil strength parameters. This test is recommended for fine cohesive > ^ soils with a degree of saturation of more than 90%. It has been ...
Inscribed r-gons: A Combinatorial approach
(Polytechnic University of Puerto Rico, 1996-12)
The author uses the concept of circular combinations to find the number of r-gons that can be inscribed in a n-gon.
Trigésimo Aniversario
(Polytechnic University of Puerto Rico, 1996-12)
La Universidad Politécnica de Puerto Rico (UPPR) cumple 30 años. Nació en 1966 cuando comenzó a ofrecer cursos técnicos conduncentes a un bachillerato en agrimensura y cartografía.
Determination of interface roughness and its correlation in amorphous-silicon/ amorphous-germanium multilayers
(Polytechnic University of Puerto Rico, 1996-06)
The importance of surfaces and interfaces of materials is increasing in many technological areas. In the microelectronic industry, for example, the J current trend is toward even faster and smaller electronic devices. ...