This paper presents a low-cost Ultra Wideband (UWB) pulse generator that can vary the pulse duration digitally by using a Step Recovery Diode (SRD), microstrip transmission lines and PIN diodes. First, a sharp edge is generated by using a SRD circuitry. Then a pulse is formed from the sharp edge through the use of transmission lines and the PIN diodes. Based on the number of transmission lines ...

The development of sophisticated multimedia applications require accurate performance evaluation tools to efficiently design and manage future high bandwidth networks. Although many works in literature present models of MPEG video traffic, few efforts have been up to now devoted to capture one of the most important characteristics: the intra-GoP correlation. In this paper an accurate, fast and ...

This paper presents a high-performance low-ringing ultra-wideband monocycle picosecond pulse generator, formed using a step recovery diode (SRD), simulated in ADS software and generated through experimentation. The pulse generator comprises three parts, a step recovery diode, a field-effect transistor and a Schottky diode, used to eliminate the positive and negative ringing of pulse. Simulated ...

The loggerhead turtle (Caretta caretta) is an endangered marine reptile for whom assessing population health requires knowledge of demographic parameters such as individual growth rate. In Cape Verde, as within several populations, adult female loggerhead sea turtles show a size-related behavioral and trophic dichotomy. While smaller females are associated with oceanic habitats, larger females ...

The shear reinforcement of dual-anchorage (SRD) is used to enhance the safety reinforced concrete structures in construction sites. In SRD, welding create reinforcement, and after production, a quality inspection bead required. Since SRD inspected for by measuring both horizontal vertical lengths, it necessary obtain this information inspection. However, difficult inspect beads using existing m...

this paper deals with optimal operation of a three-product dividing-wall column (dwc). the main idea is to design a control structure, through a systematic procedure for plantwide control, with an objective to achieve desired product purities with the minimum use of energy. exact local method is used to find the best controlled variables as single measurement or combination of measurements base...