Disertacije | Repozitorij Prirodoslovno-matematičkog fakulteta

: Analysis of extreme fire weather during catastrophic wildfires in Croatia and Australia; Ivana Čavlina Tomašević
The main focus of this study was to investigate fire weather of two catastrophic wildfires, one from Croatia, which is a part of one of the world’s most fire prone areas – the Mediterranean basin and other from Tasmania, a part of well-known fire continent – Australia. The Croatian case study included the Split wildfire in July 2017, the most severe wildfire in history given the size and unexpected fire behavior, which produced the downslope fire runs into the densely populated area...

: Analysis of the local site effects on the amplification of seismic ground motion in Croatia; Davor Stanko
In this dissertation, the analysis of the local site effects on the amplification of seismic ground motions in Croatia was performed using 1-D equivalent–linear (EQL) stochastic Random Vibration Theory (RVT) method. The main reason for choosing the relatively new 1-D EQL site response analysis with RVT-based method is the limited existing strong motion database in Croatia. In the RVT-based method, single theoretical point source Fourier Amplitude Spectrum (𝐹𝐴𝑆) defined by the...

: Anizotropija transportnih svojstava aproksimanata dekagonalnih kvazikristala; Petar Popčević
U radu je proučavana anizotropija transportnih koeficijenata (električne i toplinske vodljivosti, termostruje i Hallovog koeficijenta) monokristala aproksimanata dekagonalnih kvazikristala. Aproksimanata dekagonalnih kvazikristala. zbog natjecanja uređenja kratkog i periodičnog uređenja dugog dosega posjeduju posebno zanimljiva fizikalna svojstva od kojih su neka slična onima kod dekagonalnih kvazikristala. Dekagonalni kvazikristali u dvije dimenzije posjeduju kvazikristalno uređenje...

: Antioksidacijska, antibakterijska i citotoksična aktivnost fitokemikalija iz dubrovačke zečine (Centaurea ragusina L.); Valerija Vujčić
Biološka aktivnost roda Centaurea pripisuje se spojevima iz skupine terpena i flavonoida čija su antioksidacijska, antibakterijska, citotoksična i slična ljekovita svojstva dokazana. Cilj rada je odrediti sadržaj i sastav fitokemikalija ekstrakata hrvatske endemične biljne vrste Centaurea ragusina L. sakupljene na prirodnom lokalitetu, uzgojene u uvjetima in vitro i aklimatizirane na vanjske uvjete kao i njihovu antioksidacijsku, antibakterijsku i citotoksičnu aktivnost. U svrhu...

: Anyons, Zitterbewegung and dynamical phase transitions in topologically nontrivial systems; Frane Lunić
Nontrivial topology in physical systems is the driving force behind many interesting phenomena. Notably, phases of matter must be classified in part by their topological properties. Phases with topological (nonlocal) order, such as the fractional quantum Hall effect (QHE), can support anyonic excitations obeying fractional statistics with potential application in topological quantum computing. States lacking intrinsic topological order can still belong to topological phases, provided certain...

: Application of H-measures to evolution equations; Matko Grbac
In the thesis evolution equations of second order in \(t\) are studied. Some standard results regarding the existence, uniqueness, and well-posedness of the semilinear wave equation are revisited in the first part and generalised to the case where the coefficients have only bounded variation with respect to time. The second part begins with an introduction to the theory of pseudodifferential operators and microlocal analysis tools, with an emphasis on the notion of H-measures and their main...

: Application of information geometry methods in the development of nuclear structure models; Marko Imbrišak
Statistical analysis proved to be significant in determining the errors of theoretical models, assessing the risk of extrapolation and the sensitivity of the model to changes, as well as in the description of instabilities in the models. However, the importance of applying the analysis of the unreliability of individual parameters in the form of nuclear energy density functionals has only recently been recognized, where one of the main problems of error analysis of the parameters of those...

: Application of quantum light in holography; Denis Abramović
Holography is a powerful imaging technique that allows to record both amplitude and phase information over a broad electromagnetic spectrum in a hologram. Classical holography as a part of interferometry is capable of the most precise measurements in industry, applied and fundamental science. However, holography is not yet fully exploited and understood from the most fundamental, quantum perspective. A better understanding of holography can lead to new methods outperforming the classical...

: Application of relativistic density functionals in the modeling of nuclear weak-interaction processes; Tomislav Marketin
Relativistic density functionals are employed in a study of weak-interaction processes in atomic nuclei. The approach is based on the relativistic Hartree-Bogoliubov (RHB) model that is used to compute the self-consistent nuclear ground state, and collective excited states are modeleld with the relativistic quasiparticle random phase approximation (RQRPA).The focus of the study is the calculation of β-decay half-lives of neutron-rich nuclei that are predicted to play a role in r-process...

: Applications of graded geometry in gauge theory and gravity; Georgios Karagiannis
This thesis is devoted to the study of physical problems in Gauge Theory and Gravity, within the mathematical framework of Graded Geometry. The main advantage of this framework is that it can be used to describe mixed-symmetry tensor fields of any type in a very general and universal way. As such, it is ideal for exploiting similarities and formal analogies between Gauge Theories and Gravity, as well as for putting the latter on equal footing and for studying them in parallel. After...

: Approximation of quadratic eigenvalue problem and application to damping optimization; Matea Ugrica
In this thesis we study the parameter dependent Hermitian quadratic eigenvalue problem (PEQP) given by \((\lambda^2(\mathbf p) M(\mathbf p)+\lambda(\mathbf p) C(\mathbf p) +K(\mathbf p)) x(\mathbf p)=0\), where \(\mathbf p \in \mathbb R^m\) is a vector of parameters. Through this thesis matrices \(M(\mathbf p),\, C(\mathbf p),\, K(\mathbf p)\in \mathbb R^n\) arise from corresponding (vibrational) mechanical system represented by \(M(\mathbf p)\ddot q(\mathbf p;t)+ C(\mathbf p)\dot q(\mathbf...

: Aromatizacija različito supstituiranih derivata 3,4-dihidropirimidinona; Danijela Lesjak Kolarović
Biginellijevom reakcijom, pripravljeni su razliĉito supstituirani derivati 3,4-dihidropirimidinona. Koristeći modelni derivat 124-I-b provedena su opsežna preliminarna ispitivanja u svrhu pronalaska odgovarajućih uvjeta aromatizacije sintetiziranih derivata. Opseg preliminarnih ispitivanja potkrepljuje literaturno poznatu ĉinjenicu kako se ovaj tip spojeva vrlo teško aromatizira. Rezultat istraţivanja u sklopu ove doktorske disertacije urodio je ĉetirima novim, do sad nepoznatim...

Paginacija