1 Department of Nursing, Alexander Technological Educational Institution of Thessaloniki, Thessaloniki, Greece 2 Physical Therapy Department, Alexander Technological Educational Institution of Thessaloniki, Thessaloniki, Greece 3 “Papanikolaou” Hospital of Thessaloniki, Thessaloniki, Greece 4 Student of Nursing Department Alexander Technological Educational Institution of Thessaloniki, Thessalo...

Michael Balynsky, Alexander Kozhevnikov, Yuri Khivintsev, Tonmoy Bhowmick, David Gutierrez, Howard Chiang, Galina Dudko, Yuri Filimonov, Guanxiong Liu, Chenglong Jiang, Alexander A. Balandin, Roger Lake, and Alexander Khitun Department of Electrical and Computer Engineering, University of California-Riverside, Riverside, California 92521, USA Kotelnikov Institute of Radioengineering and Electro...

X.S. Lin’s original definition of twisted Alexander knot polynomial is generalized for arbitrary finitely presented groups. J. Cha’s fibering obstruction theorem is generalized. The group of a nontrivial virtual knot shown by L. Kauffman to have trivial Jones polynomial is seen also to have a faithful representation that yields a trivial twisted Alexander polynomial.

Case-control studies are used to determine if there is an association between an exposure and a specific health outcome. These studies proceed from effect (e.g. health outcome, condition, disease) to cause (exposure). Case-control studies assess whether exposure is disproportionately distributed between the cases and controls, which may indicate that the exposure is a risk factor for the health...

Coalgebras When I started my PhD, the idea that the theory of coalgebras might serve as a general theory of systems had emerged. But there were only a few ad hoc descriptions of speci cation languages for coalgebras which were built, in analogy with logics for algebras, on equational logic and extensions. [2] was one of the rst papers to put forward the idea that modal logics should be used as ...