Gauge invariant investigation of the nature of Confinement

We observe a strong correlation between the decrease in the number of action density peaks in SU(2) Yang-Mills configurations with cooling and that of the string tension. The nature and distribution of these peaks is investigated. The relationship with monopole currents after the abelian projection is also considered.Comment: uuencoded and Z-compressed file of the Postcript version of our contribution to LATTICE 95. 4 pages of text and 4 figure

Liquid crystal spatial light modulator with optimized phase modulation ranges to display multiorder diffractive elements

Postprint (published version

3x3 Multibeam Network for a Triangular Array of Three Radiating Elements

A multibeam antenna study based on Butler network will be undertaken in this document. These antenna designs combines phase shift systems with multibeam networks to optimize multiple channel systems. The system will work at 1.7 GHz with circular polarization. Specifically, result simulations and measurements of 3 element triangular subarray will be shown. A 45 element triangular array will be formed by the subarrays. Using triangular subarrays, side lobes and crossing points are reduced

First-order and multi-order diffractive lens using a device with 8P phase modulation range

Postprint (published version

The sphaleron energy for SU(2)-Higgs from cooling

The cooling algorithm for saddle points presented in ref. [1] is generalized to obtain static classical solutions of the SU(2)-Higgs field theory in the limit of infinite Higgs self-coupling. The sphaleron energy obtained via this algorithm is ${\cal E}_{\rm sph}= 5.08(7)\,M_W/\alpha_W$ to be compared with 5.0707 obtained in the variational approach [2].Comment: 3 pages, uuencoded compressed PostScript file. Contribution to Lattice '94, 27 Sep - 1 Oct 1994, Bielefeld, German

Roadmap on optical security

Postprint (author's final draft

Synchronizing a modular robot colony for cooperative tasks based on intrainter robot communications

The implementation of robotic cooperative tasks such as pushing an object toward a desired destination or manipulating an object using mobile robots or robotic arms requires motion coordination between the robot colony. When a robot is built by the union of several robots, such as modular robot systems, it is critical to have the complete coordination of each robot configuration within the colony and also overall robot coordination of the colony. The paper presents a demonstration of parallel motion for modular robot configurations through the combination of two types of communications, i.e., Inter-robot and Intra-robot communications. The two types of communications are described and implemented in a real modular robot system. Experiments are executed to show the performance of the robot colony synchronizatio

Noncritical quadrature squeezing through spontaneous polarization symmetry breaking

We discuss the possibility of generating noncritical quadrature squeezing by spontaneous polarization symmetry breaking. We consider first type-II frequency-degenerate optical parametric oscillators, but discard them for a number of reasons. Then we propose a four-wave mixing cavity in which the polarization of the output mode is always linear but has an arbitrary orientation. We show that in such a cavity complete noise suppression in a quadrature of the output field occurs, irrespective of the parameter values

Diseño de hormigones dirigido a la aplicación

En el contexto del proceso constructivo encaminado a realizar una obra mediante hormigón, material de construcción por excelencia de nuestros tiempos, la dosificación se presenta como una etapa esencial en el resultado final del mismo y, por lo tanto, en el de la estructura. Si bien existen en la literatura mundial numerosos métodos para la dosificación del hormigón, el hecho que actualmente la mayor parte de la producción del hormigón se realice en plantas industrializadas ha propiciado que éstas hayan desarrollado su propia metodología, sobre todo para ser más competitivas y obtener el máximo ahorro en el consumo de cemento. Este predominio de los métodos empíricos sobre los numéricos toma una especial relevancia en los hormigones no convencionales, pues la poca validez de los métodos habituales de dosificación y la no existencia, en general, de procedimientos universalmente aceptados para este tipo de hormigones, conduce a la utilización de metodologías preferentemente experimentales. Este panorama hace que el diseño de mezclas llegue a convertirse en una ardua tarea para todo aquél que no tenga experiencia en la materia. En este sentido, el presente estudio pretende aportar la información necesaria que permita al principiante hacer frente al diseño de cualquier tipo de hormigó