534 research outputs found
Mikroskopické výpočty vlastností sférických jader s použitím moderních NN+NNN sil
No full textTitle: Microscopic many-body calculations of spherical nuclei with modern NN+NNN forces Author: Bc. Radek Folprecht Institute: Institute of Particle and Nuclear Physics Supervisor: doc. Mgr. František Knapp Ph.D., Institute of Particle and Nuclear Physics Abstract: Within the scope of the present thesis, we employ the chiral effective field theory derived 2- and 3-body nuclear potentials N2LOsat, ∆N2LOGO (394) & (450), to study properties of spherical closed (sub)shell nuclei ranging from light 4 He to heavy 208 Pb. A systematic inves- tigation of the convergence of the ground-state properties of selected nuclei is performed at the Hartree-Fock mean-field and Hartree-Fock Many-Body Perturbation Theory level. Next, we use the Hartree-Fock based Tamm-Dancoff Approximation, Random Phase Approxima- tion and the Extended Random phase Approximation to construct excited states, and evaluate the corresponding electric transitions. Lastly, using the (Extended) Random Phase Approxi- mation, we look into the properties of the explicitly correlated ground states. Keywords: Chiral effective field theory nuclear potentials, Spherical Hartree-Fock mean- field, Many-body perturbation theory, Random phase approximationNázev práce: Mikroskopické výpočty vlastností sférických jader s použitím moderních NN+NNN sil Autor: Bc. Radek Folprecht Ústav: Ústav částicové a jaderné fyziky Vedoucí práce: doc. Mgr. František Knapp Ph.D., Ústav částicové a jaderné fyziky Abstrakt: Předmětem předkládané práce je zkoumání vlastností sféricky symetrických jader s uzavřenou (pod)slupkou a to počínaje lehkým 4 He až do težkého 208 Pb s využitím moderních 2- a 3-částicových jaderných potenciálů N2LOsat, ∆N2LOGO (394) & (450) odvozených z chi- rálních efektivních polních teorií. Na úrovni Hartreeho-Fockova středního pole a Hartreeho- Fockovy mnohočásticové poruchové metody se systematicky zabýváme konvergencí vlast- ností základních stavů vybraných jader. Dále s pomocí Tamm-Dancoffovy aproximace, aproxi- mace náhodnou fází a rozšířené aproximace náhodnou fází založených na Hartreeho-Fockově středním poli konstruujeme vzbuzené jaderné stavy a vyčíslujeme jím odpovídající elektrické přechody. V závěru práce se pak zabýváme vlastnostmi explicitně korelovaných základních stavů získaných z (rozšířené) aproximace náhodnou fází. Klíčová slova: Jaderné chirální potenciály, Sférické Hartreeho-Fockovo střední pole, Mno- hočásticová poruchová metoda, Aproximace náhodnou fázíInstitute of Particle and Nuclear PhysicsÚstav částicové a jaderné fyzikyMatematicko-fyzikální fakultaFaculty of Mathematics and Physic
Mnohočásticové metody v jaderném Lipkinově modelu
No full textTitle: Many-body methods within the nuclear Lipkin model Author: Radek Folprecht Institute: Institute of Particle and Nuclear Physics Supervisor: Mgr. František Knapp Ph.D., Institute of Particle and Nuclear Physics Abstract: The subject of the present thesis is the Lipkin model, a two- level degenerated quantum system enhanced by two-body interactions. The exact solutions and properties of the model are reviewed and summarized. Several many-body methods common in nuclear physics are used to solve the eigenvalue problem of the time-independent Schrödinger equation. The many-body methods applied to the Lipkin model in the present thesis are the Hartree-Fock mean-field method, the random phase approximation, the Tamm-Dancoff approximation, and the Bardeen-Cooper-Schrieffer method. We propose an instructive iterative extension to the random phase approxi- mation method. For the listed methods, we provide a comprehensive com- parison of the approximation quality for either the ground state energy or excited state energies. Keywords: Lipkin model, Hartree-Fock mean-field method, random phase approximation, Bardeen-Cooper-Schrieffer method 1Název práce: Mnohočásticové metody v jaderném Lipkinově modelu Autor: Radek Folprecht Ústav: Ústav částicové a jaderné fyziky Vedoucí bakalářské práce: Mgr. František Knapp Ph.D., Ústav částicové a jaderné fyziky Abstrakt: Předmětem předkládané práce je studium Lipkinova modelu - degenerovaného dvouhladinového systému zahrnujícího dvoučásticové inter- akce. Práce obsahuje stručné shrnutí a diskusi exaktních řešení tohoto modelu a jejich vlastností. Dále se zabýváme otázkou řešení stacionární Schrödinge- rovy rovnice odpovídající tomuto modelu pomocí běžně užívaných mnohočásticových metod jaderné fyziky. Tato práce se zabývá aplikací následujících metod: Hartree-Fockovou metodou středního pole, aproximací náhodnou fází, Tamm- Dancoffovou aproximací a Bardeen-Cooper-Schriefferovou metodou. Práce dále zahrnuje nové iterativní rozšíření aproximace náhodou fází, které je na tomto modelu vyzkoušeno. Výsledky všech těchto aproximací pro energie základního stavu případně stavů excitovaných jsou pak v rámci práce syste- maticky porovnány. Klíčová slova: Lipkinův model, Hartree-Fockova metoda středního pole, aproximace náhodnou fází, Bardeen-Cooper-Schriefferova metoda 1Ústav částicové a jaderné fyzikyInstitute of Particle and Nuclear PhysicsFaculty of Mathematics and PhysicsMatematicko-fyzikální fakult
Microscopic many-body calculations of spherical nuclei with modern NN+NNN forces
No full textTitle: Microscopic many-body calculations of spherical nuclei with modern NN+NNN forces Author: Bc. Radek Folprecht Institute: Institute of Particle and Nuclear Physics Supervisor: doc. Mgr. František Knapp Ph.D., Institute of Particle and Nuclear Physics Abstract: Within the scope of the present thesis, we employ the chiral effective field theory derived 2- and 3-body nuclear potentials N2LOsat, ∆N2LOGO (394) & (450), to study properties of spherical closed (sub)shell nuclei ranging from light 4 He to heavy 208 Pb. A systematic inves- tigation of the convergence of the ground-state properties of selected nuclei is performed at the Hartree-Fock mean-field and Hartree-Fock Many-Body Perturbation Theory level. Next, we use the Hartree-Fock based Tamm-Dancoff Approximation, Random Phase Approxima- tion and the Extended Random phase Approximation to construct excited states, and evaluate the corresponding electric transitions. Lastly, using the (Extended) Random Phase Approxi- mation, we look into the properties of the explicitly correlated ground states. Keywords: Chiral effective field theory nuclear potentials, Spherical Hartree-Fock mean- field, Many-body perturbation theory, Random phase approximatio
Many-body methods within the nuclear Lipkin model
No full textTitle: Many-body methods within the nuclear Lipkin model Author: Radek Folprecht Institute: Institute of Particle and Nuclear Physics Supervisor: Mgr. František Knapp Ph.D., Institute of Particle and Nuclear Physics Abstract: The subject of the present thesis is the Lipkin model, a two- level degenerated quantum system enhanced by two-body interactions. The exact solutions and properties of the model are reviewed and summarized. Several many-body methods common in nuclear physics are used to solve the eigenvalue problem of the time-independent Schrödinger equation. The many-body methods applied to the Lipkin model in the present thesis are the Hartree-Fock mean-field method, the random phase approximation, the Tamm-Dancoff approximation, and the Bardeen-Cooper-Schrieffer method. We propose an instructive iterative extension to the random phase approxi- mation method. For the listed methods, we provide a comprehensive com- parison of the approximation quality for either the ground state energy or excited state energies. Keywords: Lipkin model, Hartree-Fock mean-field method, random phase approximation, Bardeen-Cooper-Schrieffer method
W stronę kultury przyjemności: Recenzja The Philosophy of Pleasure Katarzyny de Lazari-Radek
No full textThe text is a review of the book The Philosophy of Pleasure by Katarzyna de Lazari-Radek. The author considers the book from a cultural perspective.Tekst stanowi recenzję książki The Philosophy of Pleasure Katarzyny de Lazari-Radek. Autor przygląda się jej w perspektywie kulturowej. 
On the “Other Side” of the World of Imagination: An Artis-tic Dialogue Between Radek Knapp and Alfred Kubin
No full textThis article examines the connexion between literature and art based on the example of the works of the writer Radek Knapp and the artist Alfred Kubin. Radek Knapp, the Austrian writer of Polish descent, is known as an author of optimistic and funny novels. Alfred Kubin, author of the novel The Other Side, was very appreciated for his illustrations during his lifetime. Many of his drawings are clothed in dark shadow and they are in contrast to the optimistic prose by Knapp. The idea to illustrate the 41 prints by Alfred Kubin with words was born in the Leopold Museum in Vienna. The short story by Radek Knapp, Die Stunde der Geburt / The Hour of Birth (2017) is, on the one hand, an artistic dialogue between writer and painter, and on the other, it becomes an universal story about searching for the meaning in life.Das Anliegen dieses Beitrags besteht darin, das Verhältnis zwischen Literatur und Malerei am Beispiel von den Werken Radek Knapp und Alfred Kubin zu untersuchen. Die Romane und Erzählungen von Radek Knapp, dem österreichischen Schriftsteller polnischer Herkunft, zeichnen sich durch Witz, Pfiff und Humor aus. Alfred Kubin, Graphiker und Autor des Romans Die andere Seite, wurde zu seinen Lebzeiten vor allem für seine Buchillustrationen geschätzt. Viele Bilder von Kubin sind von der Dunkelheit verhüllt, was im starken Kontrast zu dem heiteren Ton der Prosa von Radek Knapp steht. Die Idee, die einundvierzig Graphiken von Kubin mit dem Text zu illustrieren, war die Voraussetzung für die Sonderausstellung in Wiener Leopold Museum. Die Erzählung von Radek Knapp Die Stunde der Geburt / The Hour of Birth (2017) ist nicht nur der Katalog zur erwähnten Ausstellung, sondern auch der künstlerische Dialog zwischen dem Schriftsteller und dem Zeichner sowie auch eine universelle Geschichte von der Suche nach dem Sinn des Lebens.Przedmiotem artykułu jest wzajemna relacja literatury i malarstwa poddana analizie na przykładzie twórczości Radka Knappa i Alfreda Kubina. Radek Knapp, austriacki pisarz polskiego pochodzenia, zasłynął jako autor tryskających humorem powieści i opowiadań. Alfred Kubin, autor powieści Die andere Seite (Po tamtej stronie), za życia ceniony był przede wszystkim za swoją pracę ilustratorską. Wiele rysunków Kubina spowija mroczna aura, która żywo kontrastuje z pogodnym tonem prozy Knappa. Idea zilustrowania słowem czterdziestu jeden grafik Kubina przyświecała twórcom wystawy w wiedeńskim Leopold Museum. Opowiadanie Radka Knappa Die Stunde der Geburt / The Hour of Birth (2017) jest nie tylko katalogiem wspomnianej wystawy, ale i artystycznym dialogiem pisarza z rysownikiem oraz uniwersalną opowieścią o poszukiwaniu sensu życia
Karl Radek i Bjuro meždunarodnoj informacii CK VKP(b), 1932-1934 gg.
No full textAbstractKarl Radek and the Bureau of International Information of the CPSU’s Central Committee, 1932-1934.This article studies the short-lived history of the Bureau of International Information (BMI) of the CPSU’s Central Committee. The creation of this bureau can be explained by a crisis in the activities of regular foreign policy institutions in the early 1930s as well as by a growing tendency towards authoritarianism, the tightening of Stalin’s control over the activities of party and state organs. According to the author, the BMI was rather the informal institution of Stalin’s personal plenipotentiary than a regular administration. Therefore, the analysis deals mainly with the activities of the BMI’s director Karl Radek. From 1932 to 1934, these activities were primarily focused on political relations between the USSR, Poland and Germany. Radek developed a concept of Soviet foreign policy that he placed at the core of his negotiations with Pi¬sudski’s representatives. This concept aimed at establishing a sound collaboration between the USSR and Poland based on their anti-German sentiment, and at turning Poland from a major potential enemy of the Soviet Union into a strategic partner. The defeat of Radek’s ideas and the crisis that took place in the Soviet-Polish rapprochement in late 1933 and early 1934 brought about the decline of his influence and of that of the BMI. The bureau definitely closed in 1936. The analysis is based on Soviet and Polish archival documents and printed diplomatic documents and memoirs
Dependence of performance in selected athletic disciplines students in second level primary schools
No full textNAME: Determine the dependence of performance in selected athletic disciplines students in primary schools AUTHOR: Radek Vopršálek DEPARTMENT: Katedra tělesné výchovy SUPERVISOR: PhDr. PaedDr. Ladislav Kašpar, Ph.D. ABSTRACT: The aim of this thesis is to explore the relationship and dependency between performances in chosen sports disciplines for pupils of primary school. The disciplines I have chosen to determine the relative performance are: long jump and 60 meters sprint. In the theoretical part there is a description and analysis of these sports disciplines. In the practical part there is a measurement of pupils' performances in that two sports disciplines and creating a dependency relationship between them. KEYWORDS: Long jump, Bounce, Run, Relationship
The comparison of tranzistor power amplifier models and their influence on the ultimate properties of positional servomechanism model
No full textECM and criteria for choosing product
No full textAbstract The aim of this thesis is to define general criteria for assessing ECM products. In introduction I made teoretical overview of Enterprise Content Management(ECM). I defined ECM components and mentioned content strategy with content silo traps. Than I described ECM Compliance. I introduced results of ECM Gartner Study. I described Sharepoint 2010 and Alfresco. I stated ECM taxonomy of functionalities and general criteria for evaluating ECM products. In the end I described the process of choosing ECM products
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