purpose: to report complications involving the posterior segment after laser assisted in situ keratomileusis (lasik) in 5 myopic patients ranging in age from 26 to 38 years. patients and findings: case one developed bilateral cilioretinal artery obstruction in association with ischemic optic neuropathy. case two presented with nonsimultaneous bilateral delayed-onset optic neuropathy. in case th...

This article proposes an algorithm for recognizing road signs based on a determination of their color and shape. It first searches the edge segment sign. The boundary curve sign is defined by segment. Approximating boundaries reveals its hierarchical recognition system forms classes in form Six are at level. Two contain only one Signs classified second level hierarchy. image inside cut third th...

This extended abstract describes an entry to the MIREX’09 (Music Information Retrieval eXchange) chord detection competition. The system described here uses a combination of two algorithms previously presented by the author. The system first calculates a quantised chromagram from the audio recording. It then uses a harmonic change detection function to segment the chroma features in time. The a...

fragility curves represent the probabilities that structural damages, under various levels of seismic excitation, will exceed the specified damage states by means of earthquake intensity damage relations. conceptual aspects related to seismic vulnerability, damage and risk evaluation are discussed first, together with a short review of the most widely used possibilities for the seismic evaluati...

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Intelligent Transportation Systems (ITS) allow us to have high quality traffic information to reduce the risk of potentially critical situations. Conventional image-based traffic detection methods have difficulties acquiring good images due to perspective and background noise, poor lighting and weather conditions. In this paper, we propose a new method to accurately segment and track vehicles. ...