We introduce a very deep, Rlim∼27, multicolor imaging survey of very faint star-forming galaxies at z∼4, z∼3, z∼2.2, and z∼1.7. This survey, carried out on the Keck I telescope, uses the very same UnGRI filter system that is employed by the Steidel team to select galaxies at these redshifts, and thus allows us to construct identically-selected, but much fainter, samples. However, our survey rea...

This article presents the application of particle swarm optimization (PSO) algorithm for the design of infinite impulse response (IIR) bandpass digital filter. Bilinear transform (BLT) design method was first used as baseline method to compute the filters’ approximate transfer functions based on conversion of the analog filter’s transfer function from the s-plane to the equivalent digital filte...

System analysis based on difference or recurrence equations is the most fundamental technique to analyze biological, electronic, control and signal processing systems. Z-transform is one of the most popular tool to solve such difference equations. In this paper, we present the formalization of Z-transform to extend the formal linear system analysis capabilities using theorem proving. In particu...

In the blind equalization problem, one can recently observe that the sought unknown filter can be performed from the sole knowledge of second order statistics of the received signal. According to this fact, a powerful algorithm which is the socalled subspace method has been developed. The subspace method was previously described in rational spaces framework which seemed to be unappropriated. In...

A control system is proposed for a low Earth orbit gravity gradient stabilised microsatellite using Z wheel. The microsatellite is 3-axis stabilized using a yaw reaction wheel, with dual redundant 3-axis magnetorquers. Two vector magnetometers and four dual sun sensors are carried in order to determine the full attitude. The attitude was estimated using an Euler angles (small libration version)...

This paper describes a multilevel Z-source inverter for solar photovoltaic applications. The conventional power conversion topology performs either buck or boost the input voltage for non linear load depending upon duty ratio and modulation index in a multiple stage conversion with the help of impedance source passive network (L and C), which is usually known as Z-Source, which couples the n le...

Decays of superheavy relic particles may produce extremely energetic neutrinos. Their annihilations on the relic neutrinos can be the origin of the cosmic rays with energies beyond the Greisen-Zatsepin-Kuzmin cutoff. The redshift acts as a cosmological filter selecting the sources at some particular value z(e)+/-deltaz, for which the present neutrino energy is close to the Z pole of the annihil...

This ISR documents the capability of WFC3 to detect high redshift galaxies using the Lyman break technique. We show that the broad wavelength coverage of the camera and its filter set allow efficient color selection of star-forming galaxy candidates over the redshift range 1<z<10. In multi-band imaging programs of ~100,000 seconds of total time, the instrument reaches the sensitivity required t...

This paper provides an effective design method of inverse filters for use in multichannel 3D sound rendering. In order to obtain the optimal solution of the inverse filter, the conventional adaptive algorithm requires that the parameters are properly tuned through lots of time and effort while through the proposed method we can systematically obtain the inverse filter with the desired accuracy ...

This paper describes the design of switched-current group delay equalizers. The design process is based on the pole-zero mirroring technique; with equalizer z-transfer functions generated using an optimization algorithm. To facilitate the systematic implementation of the equalizers, a model describing the design process is developed. A novel feature of the equalizers implementation is that wave...