Theory of Systems, Systems Metaphysics and Neoplatonism

Science has been developed from the rational-empirical methods, having as a consequence, the representation of existing phenomena without understanding the root causes. The question which currently has is the sense of the being, and in a simplified way, one can say that the dogmatic religion lead to misinterpretations, the empirical sciences contain the exact rational representations of phenomena. Thus, Science has been able to get rid of the dogmatic religion. The project for the sciences of being looks to return to reality its essential foundations; under the plan of theory of systems necessarily involves a search for the meaning of Reality.

Quantum theory of spin waves in finite chiral spin chains

We calculate the effect of spin waves on the properties of finite-size spin chains with a chiral spin ground state observed on biatomic Fe chains deposited on iridium(001). The system is described with a Heisenberg model supplemented with a Dzyaloshinskii-Moriya coupling and a uniaxial single ion anisotropy that presents a chiral spin ground state. Spin waves are studied using the Holstein-Primakoff boson representation of spin operators. Both the renormalized ground state and the elementary excitations are found by means of Bogoliubov transformation, as a function of the two variables that can be controlled experimentally, the applied magnetic field and the chain length. Three main results are found. First, because of the noncollinear nature of the classical ground state, there is a significant zero-point reduction of the ground-state magnetization of the spin spiral. Second, there is a critical external field from which the ground state changes from chiral spin ground state to collinear ferromagnetic order. The character of the two lowest-energy spin waves changes from edge modes to confined bulk modes over this critical field. Third, in the spin-spiral state, the spin-wave spectrum exhibits oscillatory behavior as function of the chain length with the same period of the spin helix.

Recognition; with an outline of a theory of knowledge.

Mode of access: Internet.

Modern elementary theory of numbers

Mode of access: Internet.

Statistical theory of extreme values and some practical applications; a series of lectures.

Bibliography: p. 48-49.

A theory of asynchronous circuits I /

"This work has been supported in part by the Office of Naval Research under Contract NR 044 001"

A theory of asynchronous circuits I /

"This work has been supported in part by the Office of Naval Research under Contract NR 044 001"

A blast-wave theory of crater formation in semi-infinite targets,

"Resaerch...sponsored by the National Aeronautics and Space Administration under Contract no. NAS 3-2121."

Theory of small oscillations in boiling water nuclear reactors /

"Prepared under Contract AT(04-3)-165 with the United States Atomic Energy Commission."

Thomas De Quincey's theory of literature.

Presented as a doctoral dissertation at the University of Michigan in 1937. This revision, unfinished at the time of the author's death, has been completed by C.D. Thorpe and Paul Mueschke.

Plane-wave scattering-matrix theory of antennas and antenna-antenna interactions /

Mode of access: Internet.

Theory of probability with applications /

At the head of title page: Princeton University Station, Division 2, National Defense Research Committee.

Wind, sea and swell : theory of relations for forecasting /

Mode of access: Internet.

Theory of compound curves in field engineering.

Reprinted from the University of Colorado studies, v.2, no.2, July 1904.

Theory of teaching, with a few practical illustrations.

Mode of access: Internet.