Information education of distance students in academic libraries of public universities in the Czech Republic

This diploma thesis deals with information education of students of distance and combined study at public universities in the Czech Republic. The thesis is divided into the theoretical and practical part. The first part of the thesis introduces concepts related to information education, characterizes the system of higher education in the Czech Republic and describes the specifics of distance and combined form of study. The theoretical part also contains a chapter on information education of distance learning students abroad. The practical part describes the research of educational activities for students of distance / combined study at Czech public universities. The research forms used in the thesis are questionnaire survey and content analysis of the documents of individual colleges of libraries. The conclusion of the paper contains a summary and recommendations for improvement.Diplomová práce se věnuje informačnímu vzdělávání studentů distančního a kombinovaného studia na veřejných vysokých školách v České republice. Práce je rozdělena na teoretickou a praktickou část. V první části práce jsou představeny pojmy související s informačním vzděláváním, charakterizován systém vysokoškolského vzdělávání v České republice a popsána specifika distanční a kombinované formy studia. Teoretická část dále obsahuje kapitolu o informačním vzdělávání studentů distanční formy studia v zahraničí. Praktická část práce popisuje výzkum vzdělávacích aktivit pro studenty distančního/kombinovaného studia na českých veřejných vysokých školách. Výzkum měl formu dotazníkového šetření a obsahové analýzy dokumentů jednotlivých vysokoškolských knihoven. Závěr práce obsahuje shrnutí získaných poznatků a doporučení na zlepšení.Ústav informačních studií a knihovnictvíInstitute of Information Studies and LibrarianshipFilozofická fakultaFaculty of Art

Relativistická teorie elektronového transportu v magnetických vrstvách

Title: Relativistic Theory of Electron Transport in Magnetic Layers Author: Rudolf Sýkora Department / Institute: Institude of Theoretical Physics Supervisor of the doctoral thesis: doc. RNDr. Ilja Turek, DrSc., Department of Condensed Matter Physics Abstract: We review the density-functional theory (DFT) in detail using the Levy Lieb ap- proach. The Kohn Sham scheme is discussed, starting from the simplest spinless non- relativistic case, then including spin and considering potential spin magnetism, and finally deriv- ing the full Kohn Sham Dirac relativistic scheme. The Linear Muffin-Tin Orbital (LMTO) method for electronic-structure calculation is presented, together with mentioning the necessary changes to include the spin-orbit (SO) interaction effects to an otherwise scalar-relativistic (SR) theory. Derivation of an electronic-conductance formula for a layered system is given, based on the Landauer scattering picture and using simple non-equilibrium Green functions. The formal- ism is applied to layered metallic systems of light elements Co, Ni, Cu elements, and to layered systems with a tunnelling barrier, Fe/MgO/Ag and Fe/GaAs/Ag. The effects of the SO interac- tion on the Giant Magnetoresistance (GMR) ratio and/or the Tunnelling Anisotropy Magnetore- sistance (TAMR) for these systems are discussed....Název práce: Relativistická teorie elektronového transportu v magnetických vrstvách Autor: Rudolf Sýkora Katedra / Ústav: Ústav teoretické fyziky Vedoucí doktorské práce: doc. RNDr. Ilja Turek, DrSc., Katedra fyziky kondenzovaných látek Abstrakt: V práci jsou rozebrány detaily teorie funkcionálu hustoty s využitím pohledu Levyho a Lieba. Jsou odvozeny Kohnovy-Shamovy rovnice, nejprve pro nejjednodušší nerelativistický bezspinový případ, pak s přihlédnutím k existenci spinu a možnému spinovému magnetizmu, a nakonec jsou odvozeny plně relativistické Kohnovy-Shamovy-Diracovy rovnice. Diskutována je lineární muffin-tinová (LMTO) metoda výpočtu elektronové struktury se zmíněním nutných změn pro možnost započtení efektů spin-orbitální (SO) interakce do jinak skalárně relativistické (SR) teorie. Je odvozen vztah pro výpočet vodivosti vrstevnatého systému s využitím Landauerova rozptylového pohledu a s použitím jednoduchých nerovnovážných Greenových funkcí. Vybudovaný formalizmus je následně použit ke studiu vrstevnatých kovových systémů složených z lehkých prvků Co, Ni, Cu a vrstevnatých systémů obsahujících tunelovací bariéru, Fe/MgO/Ag a Fe/GaAs/Ag. Pro tyto systémy jsou diskutovány efekty spin-orbitální interakce ve vztahu k tzv. GMR poměru a/nebo velikosti tunelovací anisotropní magnetoresistence (TAMR). Jsou...Katedra fyziky kondenzovaných látekDepartment of Condensed Matter PhysicsFaculty of Mathematics and PhysicsMatematicko-fyzikální fakult

Shedding light on X17: community report

The workshop “Shedding light on X17” brings together scientists looking for the existence of a possible new light particle, often referred to as X17. This hypothetical particle can explain the resonant structure observed at ∼ 17 MeV in the invariant mass of electron-positron pairs, produced after excitation of nuclei such as 8Be and 4He by means of proton beams at the Atomki Laboratory in Debrecen. The purpose of the workshop is to discuss implications of this anomaly, in particular theoretical interpretations as well as present and future experiments aiming at confirming the result and/or at providing experimental evidence for its interpretation

Relativistic Theory of Electron Transport in Magnetic Layers

Title: Relativistic Theory of Electron Transport in Magnetic Layers Author: Rudolf Sýkora Department / Institute: Institude of Theoretical Physics Supervisor of the doctoral thesis: doc. RNDr. Ilja Turek, DrSc., Department of Condensed Matter Physics Abstract: We review the density-functional theory (DFT) in detail using the Levy Lieb ap- proach. The Kohn Sham scheme is discussed, starting from the simplest spinless non- relativistic case, then including spin and considering potential spin magnetism, and finally deriv- ing the full Kohn Sham Dirac relativistic scheme. The Linear Muffin-Tin Orbital (LMTO) method for electronic-structure calculation is presented, together with mentioning the necessary changes to include the spin-orbit (SO) interaction effects to an otherwise scalar-relativistic (SR) theory. Derivation of an electronic-conductance formula for a layered system is given, based on the Landauer scattering picture and using simple non-equilibrium Green functions. The formal- ism is applied to layered metallic systems of light elements Co, Ni, Cu elements, and to layered systems with a tunnelling barrier, Fe/MgO/Ag and Fe/GaAs/Ag. The effects of the SO interac- tion on the Giant Magnetoresistance (GMR) ratio and/or the Tunnelling Anisotropy Magnetore- sistance (TAMR) for these systems are discussed...

Information education of distance students in academic libraries of public universities in the Czech Republic

This diploma thesis deals with information education of students of distance and combined study at public universities in the Czech Republic. The thesis is divided into the theoretical and practical part. The first part of the thesis introduces concepts related to information education, characterizes the system of higher education in the Czech Republic and describes the specifics of distance and combined form of study. The theoretical part also contains a chapter on information education of distance learning students abroad. The practical part describes the research of educational activities for students of distance / combined study at Czech public universities. The research forms used in the thesis are questionnaire survey and content analysis of the documents of individual colleges of libraries. The conclusion of the paper contains a summary and recommendations for improvement

Magnetic interactions in a quasi-one-dimensional antiferromagnet Cu(H2O)(2)(en)SO4

A theoretical ab-initio investigation of exchange interaction between Cu atoms in an insulating antiferromagnet Cu(H2O)2(en)SO4, en = C2H8N2, is reported. While the previous experimental studies described the system's magnetism to be quasi-two-dimensional, our results, based on a mapping of the system onto an effective Heisenberg model, rather support a quasi-one-dimensional character with the exchange coupling between the Cu atoms being propagated mainly along a zigzag line lying in the crystal's bc plane and connecting the Cu atoms through the N atoms. Further, the direction of magnetic moments on the Cu atoms is suggested to be nearly along the crystal's a axis. A check of the change in the exchange constants induced either by external pressure or by various values of U in the GGA + U approximation is made. Finally, based on experimental values of positions of broad maxima in magnetic-susceptibility and specific-heat curves and using theoretical expressions available in the literature a relevant value of the U parameter and related expected value of the electronic gap are estimated to be about 5 eV and 2 eV, respectively.Web of Science11517art. no. 17B30

Exchange interactions in a low-dimensional magnetic system Cu(H2O)(2)(en)SO4

We report a theoretical ab-initio investigation of the exchange interaction between Cu atoms in Cu(H2O)2(en)SO4, en=C2H8N2(ethylenediamine), an insulating magnetic material. Unlike previous experimental studies which describe the system as a quasi-two-dimensional antiferromagnet, our results, based on the mapping of the system onto an e ective Heisenberg model, suggest a quasi-one-dimensional character of magnetism, with the exchange coupling between the Cu atoms being propagated along a zigzag line, lying in the crystal's bc plane and connecting the Cu atoms through the N atoms. Furthermore, we report the calculated positions of the H atoms that have not been provided in experimental papers.Web of Science1261515

Calculated reflection coefficients of a single planar interface with an optically biaxial Cu(en)(H2O)(2)SO4 material compared to experiment

In our previous work we presented ellipsometric measurement of (ratios of) reflection coefficients of a planar interface between air and a facet of a single-crystal monoclinic (i.e., anisotropic) material Cu(en)(H2O)(2)SO4, en = C2H8N2. The reported dependence of the coefficients on azimuthal orientation of the crystal, Figure 1 below, showed features which were ascribed to misalignment from the then-assumed ideal orientation. Here, using Berreman's formalism, we show on theoretical grounds that misalignment may truly result in the observed findings.Web of Science1687821781

Optical properties of a monoclinic insulator Cu(H2O)(2)(en)SO4

We compare theoretically predicted, by means of ab-initio calculations, dielectric tensor and related experimental values obtained from Mueller-ellipsometry measurements of an insulating monoclinic (optically biaxial) crystal of Cu(H2O)2(en)SO4, en = C2H8N2. We concentrate on the static limit, ! ! 0.Web of Science127247146