*Correspondence: Jerzy P. Lukaszewicz, Faculty of Chemistry, Nicolaus Copernicus University, ul. Gagarina 11, Torun 87-100, Poland e-mail: [email protected] Nature is a source of some biomaterials like wood and chitin, which can be successfully transformed into chars of advanced structural/surface parameters. The manuscript is discursive and suggests that particular components of the mate...

We correct the relativistic phase shift method of determining the radio emission geometry from pulsar magnetospheres proposed by Gangadhara & Gupta (2001). The correction provides a method of determining radio emission altitudes which does not depend on the viewing geometry and does not require polarization measurements. We propose to apply the method to the outer edges of averaged radio pulse ...

The Aristotelian double characterization of a primary substance exploits the difference between the part-whole relation and the non-linguistic relation of predication. A problem arises whether and how the second relation could be reduced to something else. Such a reduction is explicitly declared or at least implicitly assumed in all version of conceptualism and nominalism. The moderate realism ...

Abstract This article argues that the concept of migrant literature, developed in postcolonial studies, is a useful tool for analysing Greek literature Early Roman Empire (27 BC-AD 68). The city Rome attracted huge numbers migrants from across Mediterranean. Among them were many writers Hellenized provinces like Egypt, Syria and Asia, who wrote Greek. Leaving their native regions travelling to ...

During the gala dinner at the Nicolaus Hotel Roof Garden the traditional Poster Award winners were announced. Members of the 2013 Poster Award Jury were: Laszlo Vigh (chairman), Hungary, Makoto Ito (Japan), Norma Sterin-Speziale (Argentina), Christian Wolfrum (Zurich), Donatella Caruso (Italy), Emma De Fabiani (Italy) and Chiara Degirolamo (Italy). From about 75 posters, 36 were eligible as fin...

In 1661, Kaspar Schott published his comprehensive textbook "Cursus mathematicus" in Würzburg for the first time, his "Encyclopedia of all mathematical sciences". It was so successful that it was published again in 1674 and 1677. In its 28 books, Schott gave an introduction for beginners in 22 mathematical disciplines by means of 533 figures and numerous tables. He wanted to avoid the shortness...

Il existait au Moyen-âge des pensées profondes et raffinées du choix social, surtout chez Ramon Llull, (ca 1232-1316) et Nicolaus Krebs, surnommé ‘de Cusa’ ou ‘Cusanus’ (1401-64). Deux règles fondamentales du choix social moderne, c'est-à-dire celles de Copeland (généralisation de la règle de Condorcet) et de Borda, ont été proposées par Llull et Cusanus plusieurs siècles avant l'«âge d'or» du ...

We say that a positive integer d is special if for every integer m there exist nonzero integers a, b, c such that m = a2+ b2− dc2. In this note we present examples and some properties of special numbers. Moreover, we present an infinite sequence of special numbers.