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Excitation of molecules by cold electrons
Šulc, Miroslav ; Horáček, Jiří (advisor) ; Čárský, Petr (referee) ; Čížek, Martin (referee)
Title: Excitation of molecules by cold electrons Author: Miroslav Šulc Department / Institute: Institute of Theoretical Physics, Charles University in Prague Supervisor of the doctoral thesis: prof. RNDr. Jiří Horáček, DrSc., Institute of Theoretical Physics, Charles University Abstract: Several methods for low energy collisional processes are investigated. In the first part, attention is especially devoted to examination of applicability of the R-matrix method combined with the Schwinger-Lanczos (SL) variational principle for potential scattering with long-range forces. Next sections deal with the development of the interaction correlation-polarization (CP) potential in the framework of the Dis- crete Momentum Representation (DMR) method on the grounds of the Local Density Approximation in the Density Functional Theory (DFT) context. Obtained results are then utilized in body-frame (BF), static exchange + polarization (SEP), calcula- tions within an analysis of experimental data for e−-N2 scattering comprising a part of a larger project addressing theoretical examination of rotational excitations of small molecules in the gas phase induced by electron impact. For N2, a new phenomenon consisting in suppression of backward cross-section below 95 meV is observed and con- sequently attributed to...
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Feasibility of Non-Pharmacological Intervention in Therapy of Cognition Deficit in Czech Schizophrenia Patients - Computer-assisted Cognitive Remediation
Rodriguez Manchola, Mabel Virginia ; Šípek, Jiří (advisor) ; Horáček, Jiří (referee) ; Kulišťák, Petr (referee)
There is a body of scientific literature describing cognitive deficit in schizophrenia and the possibility of its remediation. However, in the Czech Republic, there have been so far just few studies that examined the topic. The objective of this work was to explore the feasibility of non-pharmacological intervention in the form of computer-assisted cognitive remediation of Czech schizophrenia patients with diagnosed cognitive deficit. Our results confirmed the positive short-term effect of targeted remediation of selective domains of cognitive deficit in patients with schizophrenia. Our findings suggested that 5 working memory function is the domain most sensitive to the structured intervention. These results are consistent not only with findings from other published studies that used similar computer method for remediation, but also with other studies that used different approaches. In addition, working memory function improved in the generalized form (visual intervention improved auditive function). Key words: Schizophrenia, cognition, deficit, remediation, computer
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Phaseshift analysis
Strnad, Otto ; Horáček, Jiří (advisor) ; Čížek, Martin (referee)
Nazev prace; Fazova analyza Autor: Otto Strnad Katedra (ustav): tfstav teorcticke fyziky, Matematicko-fyzikalni fakulta, Univer- zita Karlova v Praze Vedoucf bakalafske prace: prof. RNDr. Jin Horacek, DrSc. e-mail vedouciho: Jiri.Horacek@mff.cuni.cz Abstrakt: V pfedlozene praci studujeme vlastnosti statisticke Fade aproximace (Fade typu III) a pouzfvame Fade aproximaci k vypoctu delky rozptylu, sfrky rezonance a k simulaci analyzy fazoveho posuvu pfi nerelativistickem rozptylu. Provedeni iterativni linearizovane metody vyvinute pro konstrukci Fade aproxi- mace typu III je detailne testovano na simulovanych datech odvozenych pomoci dvou modelovych funkci, Metoda vykazuje vehni ryclilou konvergenci. Metoda je pouzita k vypoctu delky rozptylu, pro nizkoenergeticky elasticky rozptyl elek- tronu na atomech helia, neonu a argonu aje porovnana s publikovanymi vyslcdky. Je vypo6'tana sifka rezonance pro nejnizsf S rezonance pro rozptyl e 4- He+ a po- rovnana s vysledky prezentovanymi v [1], Je provedena analyza fazoveho posuvu pomoci Fade aproximace typu III nerelativistickeho rozptylu na simulovanych datech. Pocftacovy kod vjazyku C realizujici aproximaci Fade III je prezentovan se svym strucnym u^ivatelskym rnanualem a specifikacf vstupu a vystupu. Klicova slova: Pade aproximace, delka rozptylu, ...
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Neuronavigation in therapy and rehabilitationof schizophrenia using rTMS
Holec, Michal ; Horáček, Jiří (advisor)
Transcranial Magnetic Stimulation is a promising therapeutic method which allows non-invasive reduction of schizophrenia symptoms. The main imperfection of this technique had been the impossibility of precise targeting of the rTMS coil at the given cortical area. This can be achieved by using neuroimaging techniques and stereotactic neuronavigation, which enables to target the coil with a high degree of anatomic accuracy. The aim of the study was to investigate the relationship between excitability of motor and visual cortex. Using neuronavigated single-pulse (SP) and paired-pulse (PP) transcranial magnetic stimulation (TMS, Magstim Rapid) over right visual cortex, the phosphene thresholds were measured in 11 subjects. Motor threshold (MT) was identified by using standard methodology. In all subjects the phosphenes were induced by both SP (median = 48 %, IQR = 44,5-52,0) and PP (median = 44 %, IQR=39,5- 48,0) TMS. PP phosphene thresholds were lower than SP thresholds (U = 28,0, p ≤ 0,05). We found the positive correlation between MT and SP phosphene threshold (r = 0,597, p ≤ 0,05) but not for MT and PP. The distance of coil position from the brain surface did not correlate with MT, SP nor PP phosphene threshold. Our findings confirm the relationship between MT and phosphene threshold measured by the use of...
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Neuronavigation in Psychiatry
Matoška, Štěpán ; Horáček, Jiří (advisor)
The topic of his thesis Neuronavigation in psychiatry, I chose to Based on its long-standing interest in psychiatry and I also welcome opportunity to learn work on cutting-edge scientific workplace Psychiatric Center Prague.
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