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One of the fundamental characteristics of the magnetic state of ferromagnetic materials is the existence of a domain structure. The university textbook "MAGNETIC DOMAINS: SPECIAL PHYSICAL PRACTICE 1" is intended primarily for students of the Master's programme in Physics of Condensed Matter FKLm and for the PhD programme in Progressive Materials PMd within the profile subject Special Practice 1 at the Institute of Physical Sciences of the Faculty of Sciences of the Pavol Jozef Šafárik University in Košice. The textbook is divided into seven chapters. The first chapter is devoted to the basics of domain theory, including the history of domain observation and the specification of different types of energies in ferromagnetic body. The second chapter presents the relationship between domain structure and magnetisation processes in ferromagnetic materials The third chapter describes the different types of domain-wall interactions with the defect. The fourth chapter illustrates examples of domain structure in selected ferromagnetic body such as grain oriented and non-grain oriented electrical steels, amorphous and nanocrystalline ribbons. The fifth chapter summarises an overview of the different experimental methods used to visualise the domain structure and their advantages or disadvantages with respect to the structure of ferromagnetic materials. The last two chapters, the sixth and the seventh, are devoted to specific experimental tasks for observing the domain structure of a selected polycrystalline sample using the optical microscope Bitter powder method and the MFM (magnetic force microscopy) method. During the preparation of this undergraduate text, its individual parts were developed using the foreign language literature listed in the recommended references.
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Božena Mihalíková - Ondrej Hutník - Jozef Kiseľák
The textbook is devoted to the mathematical analysis of infinite series of numbers and functions. It is intended for students of mathematics, physics and computer science, as well as interdisciplinary study of combination with mathematics. It contains a theoretical background for investigating the convergence of infinite series, expanding functions into power and Taylor series, as well as the use of these results in various problems of mathematics, physics, and computer science. Using the historical background the textbook clarifies the motivations and the need to introduce some key concepts and their further development. Basic concepts and statements are demonstrated on a large number of solved exercises, but it contains a number of exercises for independent practice. Several results are supplemented by dynamic animations executable in the electronic version of the textbook.
E-book
Miroslav Repčák - Martin Bačkor - Peter Paľove-Balang - Silvia Gajdošová
Zriadenie cvičebne fyziológie rastlín na Katedre botaniky PF UPJŠ v Košiciach v roku 1969 bolo spojené s menom Ing. Štefana Kocúrika, CSc. (1923 - 2006), ktorý spracoval aj prvé „Návody na cvičenia z fyziológie rastlín“ (Košice 1972, 1976). Od roku 1980 sa využívala príručka doc. RNDr. Karola Erdelského, CSc. a Ing. Fridricha Friča, DrSc. „Praktikum a analytické metódy vo fyziológii rastlín“ (Bratislava 1980).
Po zvýšení počtu študentov, sa v roku 1991 ukázalo aktuálnym vydať „Návody na cvičenia z fyziológie rastlín“ v záujme lepšej prípravy a efektívnej organizácie práce na cvičeniach. Doc. RNDr. A. Košturiak, CSc. svojimi podnetnými radami prispel k podstatnému rozšíreniu úvodnej časti návodov, za čo sú mu autori zaviazaní vďakou.
Pre štvrté vydanie sme inovovali a modernizovali niektoré úlohy a zohľadnili sme možnosti inovovanej praktikárne. Výber úloh sme prispôsobili aktuálnemu rozsahu cvičení jednotlivých predmetov fyziológie rastlín v bakalárskych a magisterských študijných programoch biológie a ekológie. Ide o predmety: Fyziológia rastlín, Metabolizmus rastlín, Minerálna výživa rastlín, Rast a vývin rastlín a Ekológia rastlín. Niektoré úlohy sú vhodné tiež pre stredoškolské pokusy. Výber tém ovplyvnila výskumná orientácia nášho pracoviska na sekundárny metabolizmus, ekofyziológiu a liečivé rastliny. V návodoch sa spravidla pridržiavame jednotiek SI sústavy, niekedy uvádzame iné zaužívané jednotky.
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This electronic material provides the basic principles of creating a systematic nomenclature of organic compounds, from the simplest hydrocarbons to the more complicated nomenclature of carbohydrates. For some groups of derivatives, alternative ways of generating system names are also mentioned, as well as the most common trivial names that are still in use in the literature and in practice, in some cases being the characteristic (dominant) ones. In the introductory section, the basic rules to be respected when writing names of organic compounds are discussed. This document is intended primarily for interdisciplinary undergraduate and graduate students as support material for the courses Organic Chemistry and Selected Chapters in Organic Chemistry and Biochemistry. In the final section of this document, solved examples are given so that the student can check how the rules for forming the names of organic compounds have been understood.
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Ľubomír Antoni-Stanislav Krajči
An important part of theoretical computer science is the problem of Turing machines. This computational model has two basic properties: like any other computational program, the software of a Turing machine is composed of instructions, but in its case they are all of a single type. Every other (so far known) computer program can be transformed into a Turing machine program without loss of information. While the second feature reduces the question of what a calculator cannot do to the question of what a Turing machine cannot do, the first feature allows a much simpler investigation of such a question. Using this computational model, we can thus find concrete problems that no automaton can ever deal with (perhaps the most famous is the problem of the Turing machine stopping). Their existence demonstrates the fundamental limitations of (not only ideal) computational means, and thus encourages both criticality and humility in our thinking.
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This electronic material focuses on the subject of secondary metabolism and its products - secondary metabolites. The material gives an overview of the basic building blocks and construction mechanisms through which molecules can be synthesized in living organisms (plants). The processes of formation of the mentioned metabolites are explained using the basic mechanisms of organic reactions. Several of the secondary metabolites presented have a remarkable biological profile and are used as therapeutics or serve as lead compounds for the development of novel pharmacological agents. This electronic document is primarily intended for students of the Master's degree programme in Organic Chemistry as supporting material for the profile subject Chemistry of Natural Products.
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