Tracking a target is an essential function of seeker for missiles. The tracking mechanism consists gimbals, mounted with gyroscopes, and antenna or some other energy receiving devices such as radar, infrared (IR), laser. Stabilization gimbal necessary any guided missile to maintain the device always pointing towards target. For stabilization system, several control methods have been employed ma...

ELECT A first reported complementary metal-oxide semiconductor (CMOS)integrated acceleration sensor obtained through isotropic inter-metal dielectric (IMD) etching of a back-end-of-line (BEOL) integrated circuit interconnection stack, without any additional substrate etching steps, is presented. The mechanical device composed of a CMOSprocess 8 μm-thick metal-via-metal stack of 135 μm diameter ...

A bulk micromachined inertial measurement unit (MIMU) is presented in this paper. Three single-axis accelerometers and three single-axis gyroscopes were simultaneously fabricated on a silicon wafer using a bulk micromachining process; the wafer is smaller than one square centimeter. In particular, a global area optimization method based on the relationship between the sensitivity and layout are...

Designs leading to maximize the use of sun radiation of a given reflective area without increasing the expense on investment are important to solar power plants construction. We here provide a method that allows one to compute shade area at any given time as well as the total shading effect of a day. By establishing a local coordinate system with the origin at the apex of a parabolic dish and z...

Noncommutativity of space coordinates has been much studied from various points of view [1-3]. It arises naturally in string theory, where it is related to the presence of strong backgrounds fields. If these are constant, one obtains the more familiar case where the coordinate noncommutativity [x, x ] is a constant antisymmetric quantity. However, if the background fields depend on the spatial ...

excessive daytime sleepiness (eds) denotes a propensity to doze off or fall asleep unintentionally during the day, particularly in passive situations. there is cumulative evidence pointing to an association between sleepiness and probability of involvement in motor vehicle crashes. this study was designed to determine the prevalence of sleepiness in a group of iranian lorry drivers and its asso...