30 research outputs found
Low Energy Theorem for SUSY Breaking with Gauge Supermultiplets
Low energy theorems of Nambu-Goldstone fermion associated with spontaneously
broken supersymmetry are studied for gauge supermultiplets. Two possible terms
in the effective Lagrangian are needed to deal with massless gaugino and/or
massless gauge boson. As an illustrative example, a concrete model is worked
out which can interpolate massless as well as massive gaugino and/or gauge
boson to examine the low energy effective interaction of NG-fermion.Comment: 14page
Winding number and non-BPS bound states of walls in nonlinear sigma models
Non-supersymmetric multi-wall configurations are generically unstable. It is
proposed that the stabilization in compact space can be achieved by introducing
a winding number into the model. A BPS-like bound is studied for the energy of
configuration with nonvanishing winding number. Winding number is implemented
in an supersymmetric nonlinear sigma model with two chiral scalar
fields and a bound states of BPS and anti-BPS walls is found to exist in
noncompact spaces. Even in compactified space , this nontrivial bound
state persists above a critical radius of the compact dimension.Comment: 20pages, 14 figures, minor misprint corrections, figures added,
explanation of winding number adde
Positioning and navigation of mobile robot
Positioning tracking is not a new idea as we have been seen from the ability of the GPS (Global Positioning System) to track the position of the object, in general with acceptable accuracy but the cost of GPS installation is expensive. However, in the case of detecting the exact position in signal-blocked closed environment (e.g. inside building, forest, mines and others); the accuracy factor provide by GPS is low. Thus, this project presents a positioning tracking system that is able to track the movement of an object within a small area or inside buildings. A complete set of the positioning tracking system consists of a pair of computer mechanical mouse and a microcontroller. From the position displayed on the computer screen, the position of the object can be located. The pair of mouse detects each movement of the object and sends the movement data to microcontroller. Linear, angular displacement and positioning calculation are also being discussed. From the results, it's shown that the positioning system is applicable. However, some small errors are also occurred but in acceptable range