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spec: " Scientists in the emerging field of assisted cognition are designing AI systems to care for Alzheimer 's patient without any direct human assistance . Endemic typhus ( also called `` flea-borne typhus '' and `` murine typhus '' ) is caused by Rickettsia typhi , transmitted by fleas infesting rats , and , less often , Rickettsia felis , transmitted by fleas carried by cats or possums . Because they are wireless , cellular phones can serve as alternative means of communication . We tried to take samples - - if at all possible - - from the places best sheltered and least exposed to rainfall , including also as far as possible - - fragments of the upper parts of the chambers ( hydrogen cyanide is lighter than air ) and also of the concrete floors , with which the gas from the spilled Zyklon B came into contract at rather high concentrations . These categories include reference works ( including dictionaries ) , video cassettes , and computer programs and databases . There may have been additional progress since then . This site is for our many alumni and friends to keep in touch with former classmates and professors , update files , inform us of personal news and professional accomplishments . Rather one must be directly concerned with bodily action , speech and thought . Brick , unlike other building materials , very feebly absorbs hydrogen cyanide , it sometimes does not even absorb it at all . Functions such as respiration and digestion are also enhanced while upright . We find that the aqueous concentration of cyanide ions in the gas chambers was reduced by 1 ) the short gassing time , and 2 ) the washing of the walls with water after gassings , and that these processes would have reduced that concetration below the threshold identified by Alich et . `` They want to do something about it - - and they are . The fact that Rudolf ignores the central arguments of our article while nitpicking at a few minor points reinforces the idea that he is engaging in the strategy of attrition . BC Prototyper is intended for evaluation , education , and simple prototyping use . The pilot , to the extent that he had time to think at all , was faced with weighing the reliability of the controller against that of the anonymous engineers who built the avoidance detector . Most importantly , Rudolf ignores the central points of our argument .