In this paper a new geometric-mean circuit for current-mode square-root domain filters (SRD) is presented. The geometric-mean circuit employs MOSFET transistors that are operating in both strong inverted saturation and triode regions and works in low supply voltage. Simulation results by HSPICE confirm the validity of the proposed design technique.

In this work, we present an algorithm to analytically estimate the frame goodput of a correlated MPEG-2 video source that traverses a first network node’s buffer; where frame goodput is defined as the ratio of the number cells in completely and correctly transmitted frames through the buffer to the total number of cells arriving to the buffer. The effect of changing the output-to-input line spe...

A SPICE-compatible simulation methodology for analyzing open– and closed-loop high-frequency electronic ballasts for fluorescent lamp was developed. The proposed procedure applies envelope simulation and makes use of the SPICE-compatible model of a fluorescent lamp. Experimental results validate the reliability of proposed simulation method.

The aim of this paper is to analyze the influence of an increase on passengers demand in a shared airport between military and civil personnel. The paper investigates how this increase may influence the military operations of a high strategic airport. Using as a case study the Salvador International Airport, home to the aircraft fleet responsible for maritime patrol in Brazil, an airport demand...

This study tries to develop an Evacuation Simulation Model (ESM) by which the architecture plans for egress routes can be compared at normal condition evacuation or emergency evacuation with static (fixed blockage of selected target spaces, e.g. earthquake; bomb) or dynamic (timed blocked of target spaces, e.g. fire) blocking. ESM can be used to identify the potential risk of the egress routes ...

the MPEG-2 encoder.

We present a novel error-concealment method for MPEG-2 video decoders. Imperfect transmission of block-based compressed images may result in loss of blocks, making image degradation inevitable. In the hybrid error-concealment method, both spatial and temporal error concealment repair the damaged regions through adaptive interpolation in the respective domains. In order for the hybrid method to ...

We describe results from a computer simulation-based study of a large-scale, human-initiated crisis in a densely populated urban setting. We focus on the interaction between human behavior and the communication infrastructure in the aftermath of the crisis. We study the effects of sending emergency broadcasts immediately after the event, advising people to shelter in place, and show that this r...