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Express Logic develops, markets and supports the ThreadX® real-time operating system (RTOS), NetX TCP/IP networking stack, USBX USB stack, FileX® embedded file system, and GUIX GUI toolkit for embedded applications.
ThreadX is a royalty-free, full source code, small-footprint, low-overhead RTOS that is extremely easy to learn and use. ThreadX is one of the most widely deployed RTOS products in the world, with over 1.5 billion products based on ThreadX.
Definition: Biometric characteristics can be divided in two main classes: physiological are related to the shape of the body.
The oldest traits, that have been used for more than 100 years, are fingerprints.
Other examples are face recognition, hand geometry and iris recognition.
Recently, a new trend has been developed that merges human perception to computer database in a brain-machine interface.
This approach has been referred to as cognitive biometrics.
Cognitive biometrics is based on specific responses of the brain to stimuli which could be used to trigger a computer database search.
Currently, cognitive biometrics systems are being developed to use brain response to odor stimuli , facial perception  and mental performance  for search at ports and high security areas.
These systems are based on use of functional transcranial Doppler (fTCD) and functional transcranial Doppler spectroscopy (fTCDS)  to obtain brain responses, which are used to match a target odor, a target face or target performance profile stored in a computer database.
Thus, the precision of human perception provides the data to match that stored in the computer with improve sensitivity of the system.
behavioral are related to the behavior of a person.
The first characteristic to be used, still widely used today, is the signature.
More modern approaches are the study of keystroke dynamics and of voice. Strictly speaking, voice is also a physiological trait because every person has a different pitch, but voice recognition is mainly based on the study of the way a person speaks, commonly classified as behavioral.
Other biometric strategies are being developed such as those based on gait (way of walking), retina, hand veins, ear canal, facial thermogram, DNA, odor and scent and palm prints.
FileX® is a high-performance MS-DOS FAT-16/FAT-32 compatible file system, fully integrated with ThreadX.
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