Abstract Metal ceramic restorations have been used in fixed prosthodontics since the 1950s, but the lack of aesthetics, the inclination to use metal-free materials, possible allergic reactions to metals, and the high cost of high noble alloys have increased the use of all-ceramic materials. The ongoing development of ceramic materials led to the introduction of zirconia to fixed prosthodontics over a decade ago. The mechanical properties of zirconia have proven to be excellent, but the clinical outcome of conventional fixed zirconia restorations over the long term is unclear. This retrospective clinical study evaluated two- to seven-year outcomes, early complications during prosthetic treatment and short-term failures during the first year of use of zirconia single crowns and fixed dental prostheses (FDPs). The usefulness and durability of zirconia single crowns in abutment teeth of partial removable dental prostheses (RDPs) was also evaluated. The material consisted of 173 patients treated with zirconia single crowns or FDPs by undergraduate dental students between 2007 and 2010. Of these patients 94 were women and 79 men (mean age 55 years, range 18–79 years). Altogether 268 zirconia single crowns (mean 3 crowns, range 1–12 crowns per patient) had been fabricated for 88 patients and 120 zirconia FDPs (range 3–12 units, mean 4.5 units) for 102 patients. Seventeen patients had received both crown(s) and FDP(s). The results show that zirconia single crowns and FDPs are a suitable treatment alternative in fixed prosthodontics. Early complications during prosthetic treatment and short-term failures during the first year of use were few. The survival rate of the zirconia single crowns after 3.9 years (2–6 years) was 89% and the success rate was 80%. The survival rate of zirconia FDPs after 4.9 years (3–7 years) was 100% and the success rate was 89%. Zirconia single crowns perform well as abutment teeth of partial RDPs with a metal framework, but fractures in the veneering porcelain remain a problem. / Tiivistelmä Metallokeraamisia rakenteita on käytetty kiinteässä protetiikassa 1950-luvulta lähtien, mutta puutteet estetiikassa, pyrkimys metallittomiin materiaaleihin, mahdolliset allergiset reaktiot ja jalojen metallien korkea hinta ovat lisänneet kokokeraamisten materiaalien käyttöä. Kokokeraamisten materiaalien kehitystyö on tuonut zirkonian kiinteän protetiikan materiaaliksi. Zirkonian mekaaniset ominaisuudet ovat osoittautuneet erinomaisiksi, mutta hammaskantoisten kiinteiden zirkonia-runkoisten proteesien kliiniset pitkäaikaistulokset puuttuvat. Tämän retrospektiivisen kliinisen tutkimuksen tarkoituksena oli selvittää zirkonia-runkoisten yksittäisten kruunujen ja zirkonia-runkoisten siltojen menestymistä 2–7 vuoden aikavälillä sekä kartoittaa niiden valmistuksen aikaiset ongelmat ja varhaiset epäonnistumiset ensimmäisen vuoden aikana. Lisäksi tutkittiin zirkonia-runkoisten yksittäisten kruunujen käyttökelpoisuutta ja kestävyyttä metallirunkoisten rankaproteesien tukihampaina. Materiaali koostui 173 potilaasta, joille hammaslääketieteen opiskelijat olivat tehneet zirkonia-runkoisia yksittäisiä kruunuja tai zirkonia-runkoisia siltoja vuosina 2007–2010. Potilaista 94 oli naisia ja 79 miehiä (keski-ikä 55 vuotta, jakauma 18–79 vuotta). Kaiken kaikkiaan 268 zirkonia-kruunua (keskimäärin 3 kruunua, jakauma 1–12 kruunua potilasta kohti) oli valmistettu 88 potilaalle ja 120 siltaa (keskimäärin 4,5 yksikköä, jakauma 4,5 yksikköä) 102 potilaalle. Seitsemälletoista potilaalle oli tehty sekä kruunuja että siltoja. Tulokset osoittavat, että zirkonia-runkoiset kruunut ja sillat ovat käyttökelpoisia kiinteässä protetiikassa. Valmistuksenaikaiset ongelmat ja varhaiset epäonnistumiset ovat vähäisiä. Yksittäisten kruunujen selviytymisprosentti 3,9 vuoden jälkeen (2–6 vuotta) oli 89 % ja onnistumis-prosentti 80 %. Siltojen selviytymisprosentti 4,9 vuoden jälkeen (3–7 vuotta) oli 100 % ja onnistumisprosentti 89 %. Zirkonia-runkoiset kruunut toimivat hyvin rankojen tukihampaina, mutta niiden ongelmana ovat päällepolttoposliinin lohkeamat.

This research explores the implications of the distinction between transactional and relational understandings of the Numbered Treaties, negotiated by Indigenous peoples and the Dominion of Canada from 1871-1921. It deconstructs representations of the Numbered Treaties as “land transactions” and challenges the associated forms of oppression that emerge from this interpretation. Drawing on oral histories of the Numbered Treaties, it argues instead that they established a framework for relationship that expressly affirmed the continuity of Indigenous legal and political orders. Further, this dissertation positions treaties as a longstanding Indigenous political institution, arguing for the resurgence of a treaty-based ethic of relationality that has multiple applications in the contemporary context. It demonstrates how a relational understanding of treaties can function as a powerful strategy of refusal to incorporation within the nation state; arguing that if treaties are understood as structures of co-existence rather than land transactions, settler colonial assertions of hegemonic authority over Indigenous peoples and lands remain illegitimate. Furthermore, it examines how a relational orientation to treaties might inspire alternatives to violent, asymmetrical, and hierarchical forms of co-existence between humans and with other living beings. To this end, it takes up the potential for treaties to inform legal and political strategies that are reflective of Indigenous philosophies of relationality, providing applied examples at the individual, intrasocietal, and intersocietal levels. / Graduate / 2018-12-18

Crown selected youth diversion has received little academic attention in Canada. As a process that channels offenders out of the formal legal system, diversion purports to achieve contradictory self-serving system and offender-based goals. Using 50 randomly selected prosecution files – half of which the Crown diverted and half of which the Crown prosecuted – a mixed method investigation of diversion assesses cases through quantitative content analysis and grounded theory method. Based on the quantitative analysis, it is argued that there is an emerging patterned nature of Crown selected diversion that is not completely benign. This patterned nature of diversion unearths a distinctive discourse of diversion/non-diversion. Qualitatively, it is argued that the cases are organized around three temporal moments that create an area for distinctions to be made in terms of threat, responsibility, (in)tolerableness and recourse. Seemingly, there is a persistent paradoxical existence of the diversion process that emerges from the case files.

>Magister Scientiae - MSc / The aim of this study was to investigate the color stability of two provisional restorative materials used in crown and bridge cases upon exposure to different tea staining solutions and to evaluate the effectiveness of a polishing technique in removing the tea stains from the stained provisional restorative materials.

A new individual-based forest model for the species beech (Fagus sylvatica L.) was developed and implemented. The model called BEEch Plasticity (BEEP) describes tree crown plasticity phenomenologically and is able to model aboveground competition for PAR on a process basis. The current debate about the tree interactions in near-natural beech forests and their role in emergent forest structures and dynamics led to the research questions if (1) observed patterns can be modeled and reproduced by only describing the aboveground tree interactions, (2) what effects tree crown plasticity has on the structure and dynamics of near-natural beech forests, and (3) what effects selective thinning has on the structure and dynamics of near-natural beech forests. The BEEP model was developed, parameterized, calibrated, and validated according to data from the unmanaged forest `Schattiner Zuschlag' near Lübeck, North-Germany, while additional data from the sites Langula (Thuringia) and Fabrikschleichach (Bavaria) was used for model parameterization and calibration. Three simulation experiments were conducted. In the first experiment, the BEEP model was run 10 times for 2000 time steps with plastic tree crowns and the emergent forest structure was analyzed using structural indices. In the second experiment, the BEEP model was run again 10 times for 2000 time steps but with a modified crown model that only uses rotation-symmetric tree crowns. In the third experiment, the BEEP model was enhanced with a selective thinning procedure that uses target trees with specific diameter and heights as thinning objects. Forest structure was analyzed through the application of structural indices that capture different aspects of forest structure and by means of characterization of forest development phases. Analysis was accomplished only for the time steps 1000-2000 in order to allow transient oscillation in forest dynamics to develop. The results showed that the focus on aboveground competition and tree interactions sufficed to model beech forests and reproduced a wide range of patterns observed in near-natural and old-growth beech forest. In particular, the BEEP model was able to simulate a multi-layered forest structure with a mosaic structure of several developmental stages on a relatively small area of 0.5 ha. The simulated forest had wide diameter and age distributions. The diameter distribution was reversed-J-shaped. The age range of canopy trees exceeded 200 years. The comparison between simulations with plastic and rotation-symmetric tree crowns revealed that crown plasticity reduced tree competition for crown space and PAR and enhanced the forest structure and heterogeneity in the long term by allowing more tree cohorts of dfferent developmental stages to coexist. This supports the notion that crown plasticity drives beech forest dynamics in near-natural forests. The comparison between simulations with plastic tree crowns and with additional selective thinning showed that thinning does not affect the forest structural heterogeneity and reduces tree crown competition, while spatial patterns of tree positions remained unaltered. However, crown centroids were more regularly distributed. Model assumptions in the submodel routines, especially in the radiation and mortality submodel, question the reliability of the model results, because of the high sensitivity that these routines evoke on model outcomes. Therefore, revised versions of the submodels and a thoroughly validated crown growth model, may produce different results. Thus, the results presented in this study should be treated with care and cannot be used for generalizations about tree interactions in near-natural beech forests.

Cooperating defendant Abstract The cooperating defendant represents a relatively new instrument of Czech criminal law, it was introduced into the Czech legal system with effect from 1 January 2010. The main purpose of this legal instrument is to fight organized crime, which is characterized by its high social danger and is extremely difficult to combat for law enforcement agencies due to the considerable sophistication of the internal hierarchy of organized criminal groups. The legal instrument consists of the cooperation of the defendant with a public prosecutor, who designates them as a cooperating defendant in the indictment in exchange for information capable of making a significant contribution to the uncovering of organized criminal groups. The cooperating defendant is rewarded for their cooperation with a mitigation of their sentence and the sentence may even be dropped altogether. The first chapter of this thesis analyzes the terms of cooperating defendant and crown witness, describes the process of introducing the legal instrument of cooperating defendant into the Czech legal system and also mentions some similar legal instruments. The second chapter deals with the current legislation, some of its shortcomings and their possible solutions. The third chapter lists some of the most important benefits...

Cooperating defendant Abstract This thesis on Cooperating defendant is focused on the development of this institute, its connection to organized crime and relevant international and Czech legislation. The thesis consists of the introduction, five chapters, that each presents individual topics in detail, and the conclusion. The first chapter analyses historical development of the institute of crown witness and its connection to the institute of cooperating defendant, the context of adoption of this institute into the Czech legislation and the subsequent amendment of the relevant provisions. At the same time, it summarizes the planned changes concerning the institute of cooperating defendant within the framework of recodification of criminal procedure. The second chapter analyses organized crime in connection to the institute of cooperating defendant. It focuses on the occurrence of organized crime in the Czech Republic, its specific features and legislation, the purpose of which is to fight organized crime. The third chapter is focused on the international legislation of the institute of cooperating defendant, which is mainly defined by international organizations, such as the UN, the European Union and the Council of Europe. The current legal regulation of the institute of cooperating defendant is analysed...

<p>Secondary atomization is very important in applications like IC engine and aircraft engine performance, agricultural sprays, and inkjet printing to name a few. In case of IC engines and aircraft engines, a good understanding of the modes of secondary atomization and the resultant drop size can contribute to improving the fuel injection and hence the efficiency of the engine. Similarly, with the help of appropriate secondary atomization desired agro-spray quality, ink usage and print quality can be achieved which would optimize the usage of chemicals and ink respectively and avoid any harmful effects on the environment.</p> <p> </p> <p>One of the reasons for secondary atomization that occurs very often in most of the spray applications is the drop impact on a solid or liquid surface. Especially it is cardinal to understand the impact of a drop on a liquid film since even in case of impact of liquid drops on a solid surface ultimately the drops that are injected at a later time are going have a target surface as a thin liquid film on the solid base due to the accumulation of the previously injected drops. Analysis of drop impact on a liquid film with non-dimensional thickness ranging from 0.1 to 1 has been done thoroughly before (Cossali <i>et al.,</i> 2004, Vander Waal <i>et al.,</i> 2006, Moreira <i>et al.,</i> 2010), however, analysis of drop impact on a liquid film with non-dimensional thickness greater than 1 is still in a rudimentary stage. This work focuses on determining the probability density functions for the secondary drop sizes for drops produced in case of drop impact on a liquid film while varying the h/d ratio beyond 1. The experimental set-up used to study drop impact includes a droplet generator and DIH system as mentioned in, Yao <i>et al.</i> (2017). The DIH set-up includes a CW laser, spatial filter, beam expander and a collimator as adapted from Guildenbecher <i>et al.</i> (2016). The height of drop impact is varied to vary the impact <i>We</i>, by adjusting the syringe height. Three fluids- DI-Water, ethanol and glycerol are tested for examining the effect of viscosity on the resultant drop sizes. Results are plotted with respect to viscosity, impact <i>We</i> and the non-dimensional film thickness, as the fragmentation of drops is directly associated to these parameters. Results indicate that majority of the secondary droplets lie in the size range of 25 µm to 50 µm. It is also observed that the tendency of secondary atomization from crown splashing increases with the increase in <i>We</i> and decreases with increase in <i>Oh.</i></p>

A novel crown ether precursor was developed in which a rigid 4-oxahexacyclo (5.4.1.26.3,10.05,9.08,11) dodecyl cage moiety ("cage functionality") was incorporated.

The purpose of this thesis was to investigate how crown ethers behave and interact with different cations and to optimise the setup of the electrophoretic NMR. To get a good electrophoretic NMR measurement the electrophoretic phase shift needs to be big. To increase the phase shift some parameters needed to be adjusted, parameters such as the concentration of crown ether and cation, the duration of magnetic field gradient pulse δ, the magnetic field gradient strength g, the diffusion time Δ and the applied voltage V. The main focus then put on crown ethers 15-crown-5 and 18-crown-6. The cations used were lithium (Li), sodium (Na), potassium (K), caesium (Cs), calcium (Ca) and barium (Ba). The effective charge was obtained by using pulsed gradient NMR to derive the diffusion coefficient and electrophoretic NMR to get the electrophoretic mobility. These data were used to calculate the equilibrium constant of the formed complex. The outcome of the investigation: the affinity for 18-crown-6 was in the following order barium &gt; potassium &gt; caesium &gt; sodium &gt; calcium &gt; lithium and for 15-crown-5 barium &gt; sodium &gt; calcium &gt;  caesium &gt;  potassium &gt; lithium.