The exchange of a prescribed drug by other similar, by generic products and even by custom products has become common practice in our country, often ignoring basic tenets of bioequivalence, interchangeability, stability and characteristics of the pharmaceutical compounds. In the case of drugs of narrow therapeutic index, such as levothyroxine, these problems are intensified, putting the effecti...

Acknowledgements It is a pleasure to thank Jan Ambjrn for always inspiring and stimulating supervision and collaboration. I am also grateful for the valuable and fruitful collaboration that I have had with Jerzy Jurkiewicz and Yuri Makeenko as well as Zdzisek Burda and Leonid Chekhov. Finally the positive atmosphere and the support that I have experienced in the high energy theory group at NBI ...

Personal identity has many facets, as it involves race, language, personal interests, religion, and ethnicity, among other attributes. Yet all over the world individuals and groups seek to define themselves in exclusive terms. This paper develops a simple model of individual incentives and group interests to explain this puzzle. ∗Faculty of Economics, University of Cambridge. †Faculty of Econom...

Abstract. A topological group H is called ω -narrow if for every neighbourhood V of it’s identity element there exists a countable set A such that V A = H = AV. A semigroup G is called a generalized group if for any x ∈ G there exists a unique element e(x) ∈ G such that xe(x) = e(x)x = x and for every x ∈ G there exists x − 1 ∈ G such that x − 1x = xx − 1 = e(x). Also le...

A low cross-polarization slot array antenna in the narrow wall of ridge waveguide is presented. A non-angled slot which is created in the narrow wall of the ridge waveguide is considered to be used as radiating resonant slot. The normalized resistance and normalized reactance curves are presented for design purposes. A six element slot array waveguide antenna with ridges on its narrow wall is t...