Puusepp's sign: a Babinski's sign equivalent

On nonnegative sign equivalent and sign similar factorizations of matrices

Natural Selection: Sign, Sign, Everywhere a Sign

Natural selection is an important factor influencing variation in the human genome, but most genetic studies of natural selection have focused on variants with unknown phenotypic associations. This trend is changing. New studies are rapidly revealing the effects of natural selection on genetic variants of known or likely functional importance.

Ela on Nonnegative Sign Equivalent and Sign Similar Factorizations of Matrices∗

Dedicated to Hans Schneider on the occasion of his eightieth birthday Abstract. It is shown that every real n×n matrix is a product of at most two nonnegative sign equivalent matrices, and every real n × n matrix, n ≥ 2, is a product of at most three nonnegative sign similar matrices. Finally, it is proved that every real n×n matrix is a product of totally positive sign equivalent matrices. How...

Give me a sign, any sign.

For clinical progress to occur in lung cancer, advances must be made in many inter-related areas. Advances in chemoprevention will be most useful if testing is able to identify those at greatest risk of developing lung cancer. Advances in surgical and ablative therapies will be most useful if testing is able to identify lung cancer at the earliest possible stage. Advances in systemic, targeted ...

Bilateral Schwartze Sign, Decision-Making for Surgery

Otosclerosis is an otic capsule disorder that leads to progressive conductive and/or sensorineural hearing loss due to stapes footplate fixation and cochlear bone involvement. The disorder is bilateral in 70% of patients and it usually starts between the third and fifth decade. One of its characteristic clinical findings is Schwartze sign which refers to a reddish discoloration over the promont...