# Search results for: Roman Duda

Kwartalnik Historii Nauki i Techniki > 2016 > 61 > 4 > 7–61

Wrocławskie Studia Wschodnie > 2016 > 20 > 221-230

Wrocławskie Studia Wschodnie > 2015 > 19 > 263-273

Mathematica Applicanda > 2015 > 43 > 2

Chance has always accompanied man. He was afraid of the elusive forces behind him, but he was also fascinated. Relatively late from this fascination arose the understanding that in some circumstances chance can be measured and, consequently, with the help of mathematics to reveal the regularities behind it. It began with gambling games already known in ancient times, such as the dice game popular...

The paper deals with the history of Polish mathematical societies since 1917, when the Mathematical Society in Lvov was founded. In the second half of the 19th century there appeared first national mathematical societies in Russia, France, United Kindom, Italy, United States, Germany. In Poland, partitioned then by neighbour powers (Russia, Prussia, Austria) whose policy was to deny Polish national...

The source article by L. Maligranda and W. Piotrowski (2017) presents rich material concerning the life and academic career as well as scientific achievements of Stefan Kempisty, professor at Stefan Batory University in Vilnius. However, he has little to say about his death. Indeed, the circumstances of this death have so far been unclear. The archival research carried out recently in Vilnius, however,...

The three universities – Poznań and Vilnius in Poland, Kaunas in Lithuania – had much in common: all three were founded in 1919, each promised studies in mathematics, and none possessed a native mathematician of its own. Mathematicians had to be taken from a far. Poznań relied on Zdzisław Krygowski (1872-1955), a newcomer from the Lvov polytechnic, who in the next twenty years laboriously worked up...

To understand the origin of mathematics it seems reasonable to turn our attention to its deep anthropological roots and thus to consider the role of the central nervous system; the evolution of the faculties of thinking, speaking, and understanding symbols; the emergence of mythology, magic and rites; and early geometrical and arithmetical conceptions and their initial development. The article offers...

Since medieval times mathematics was being developed mainly in Central and Western Europe but in the 19th century it greatly expanded both to the United States and to some countries of Central-Eastern Europe. This expansion, accompanied by the rapid growth of mathematics as a whole, has recently become an object of interest and investigation. The interest, however, reflects the Western viewpoint,...

The aim of this work is to calculate the effective area of a compressor recirculation valve. Analytical solution and numerical modeling for compressible flow through a valve will be presented. Critical parameters of flow will be determined. Numerical modeling will be performed using ANSYS FLUENT. The results of the numerical solution will be compared with the analytical solutions.

In the paper the method of automatic control of the two stage hybrid sorption-compression refrigeration system for different ambient conditions is presented. The main advantages of the system are its environmental friendly working fluids and waste or renewable low temperature heat source utilization. The control algorithm is designed for operation in four seasons’ conditions. During cold seasons the...

The requirements for environmentally friendly refrigerants promote the application of both CO2 and water as working fluids. Both solutions have disadvantages resulting from the high temperature limit for CO2 and the low temperature limit for water. This can be avoided by the application of the hybrid adsorption-compression system, where water is the working fluid in the adsorption cycle which is used...

Kwartalnik Historii Nauki i Techniki > 2016 > 61 > 4 > 7–61

Mathematics in Poland had good names in medieval times and in the first two centuries of modern times, e.g. Vitello, Copernicus, Broscius, Kochanski. Since mid-XVII c., however, there begun a decline of the Polish-Lithuanian state and its culture which led to the loss of sovereignty and to partitions 1795–1918. On the other hand, it was a time of Newton and Leibniz who invented calculus and of their...

Wrocławskie Studia Wschodnie > 2016 > 20 > 221-230

Antoni Łomnicki was one of the outstanding mathematicians associated with the Jan Kazimierz University in Lvov and the Lvov University of Technology. His teaching and academic career was linked to Tarnów and Lvov. His scholarly oeuvre encompassed papers dealing with e.g. theory of probability, mathematical cartography or statistics. He was also passionate about mountaineering. The article examines...

Pre-war academic staff in Poland, seriously curtailed during World War II, could not meet satisfactorily post-war demands of quickly expanding academic schools. Help has been provided by the pre-war school teachers. The article describes the situation in the field of mathematics, offering fates of over 40 school teachers of mathematics who joined universities and polytechnics, and giving some general...

Dramatic historical events of the last two centuries in Poland (partitions, uprisings, wars, oppressions etc.) heavily influenced fates of all people, including mathematicians. Distinguishing several periods by the eventful years 1795, 1832, 1862, 1913, 1919, 1939, 1945, 1952, 1989, the author recalls some Polish mathematicians for each of them (in total over 50) to explain what they could or could...

The aim of this paper is the presentation of the method for thermal conductivity measurement and numerical modeling of temperature distribution in apparatus for measuring the thermal conductivity. Experimental studies will be carried out in transient state until the steady state heat conduction in apparatus is achieved. The calculated and measured temperature distribution will be compared. The time...

In the flow of mathematical ideas from the West to Central-Eastern Europe one can distinguish several typical forms: 1) foreign mathematicians, invited to cultivate mathematics upon new ground (e.g. Euler in Russia); 2) domestic mathematicians who completed their studies abroad and continued research after returning home (e.g. W. Buniakowski or M. Ostrogradski in Russia); 3) domestic mathematicians...

Wrocławskie Studia Wschodnie > 2015 > 19 > 263-273

The article is devoted to the life of Kazimierz Bartel, a scholar and a politician. The author presents all stages of his biography: from school and university days, through the story of a young scholar from the Lviv University of Technology and soldier taking part in three wars (First World War, Polish-Ukrainian, Polish-Bolshevik War), to that of asocial and political activist in independent Poland...

Mathematica Applicanda > 2015 > 43 > 2

Biography of Jerzy Urbanowicz (1951-2012) whose life included mathematical studies and achievements in cryptography