Why are face composites difficult to recognize?

Banks winners in tournaments are difficult to recognize

Given a tournament T, a Banks winner of T is the top vertex of any maximal (with respect to inclusion) transitive subtournament of T. In this technical note, we show that the problem of deciding whether some fixed vertex v is a Banks winner for T is NP-complete.

Pragmatically Computationally Difficult Pragmatics to Recognize Humour

The humour found in short jokes and their often equivalent newspaper cartoons graphic representations are often dependent on the results of ambiguity in human speech. The ambiguities can be unexpected and funny. Sometimes wellknown ambiguities cooperatively repeated can also be funny. Captioned cartoons often derive their humour from an unexpected ambiguity that can be understood by a listener ...

Small Targets: Why are they So Difficult to Acquire?

Facilitating the acquisition of small targets is an active area of research. Despite the usefulness of the techniques proposed so far, we show why this topic can benefit from more fundamental work. We investigate three factors that might account for the observed drop in performance when selecting small targets: motor accuracy, visual legibility and quantization. Our findings suggest that visual...

Why are Ferroelectric Polymers Difficult to Find – And Difficult to Verify

Osteitis Pubis After TURP: A Rare Complication Difficult to Recognize

TURP is a widespread urologic procedure that is performed by many urologists. This report describes a rare complication that causes serious morbidity because it is not recognized in time. This is also the first report of a prostatosymphyseal fistula treated without major surgery. Eventually diagnosis is made by a MRI 5 months after surgery. Decompressive surgery was necessary to treat pubic ost...