This work focusses on the development of top-emitting white organic light-emitting diodes (OLEDs), which can be fabricated on metal substrates. Bottom-emitting OLEDs have been studied intensively over the years and show promising perspectives for future commercial applications in general lighting. The development of top-emitting devices has fallen behind despite the opportunities to produce these devices also on low-cost opaque substrates. This is due to the challenges of top-light-emission concerning the achievement of a broad and well-balanced white emission spectrum in presence of a strong microcavity. The following work is a further step towards the detailed understanding and optimization of white top-emitting OLEDs. First, the available metal substrates and the deposited silver electrodes are examined microscopically to determine their surface characteristics and morphology in order to assess their applicability for thin-film organic stacks of OLEDs. The examination shows the suitability for untreated Alanod metal substrates, which display low surface roughness and almost no surface defects. For the deposited silver anodes, investigations via AFM show a strong influence of the deposition rate on the surface roughness. In the main part of the work top-emissive devices with both hybrid and all-phosphorescent architecture are investigated, in which three or four emitter materials are utilized to achieve maximum performance. The feasibility for top-emitting white OLEDs in first and second order devices is investigated via optical simulations, using the example of a three-color hybrid OLED. Here, the concept of a dielectric capping layer on top of the cathode is an essential criterion for broadband and nearly angle independent light emission. The main focus concerning the investigation of fabricated devices is the optimization of the organic stacks to achieve high efficiencies as well as excellent color quality of warm white emission. The optimization of the hybrid layer structure based on three emitter materials using a combined aluminum-silver anode mirror resulted in luminous efficacies up to 13.3 lm/W and 5.3 % external quantum efficiency. Optical analysis by means of simulation revealed a superior position concerning internal quantum efficiency compared to bottom-emitting devices with similar layer structure. The devices show an enhanced emission in forward direction compared to an ideal Lambertian emitter, which is highly preferred for lighting applications. The color quality - especially for devices based on a pure Al anode - is showing excellent color coordinates near the Planckian locus and color rending indices up to 77. The introduction of an additional yellow emitter material improves the luminous efficacy up to values of 16.1 lm/W and external quantum efficiencies of 5.9 %. With the choice of a all-phosphorescent approach, using orange-red, light blue and green emitter materials, luminous efficacies of 21.7 lm/W are realized with external quantum efficiencies of 8.5 %. Thereby, color coordinates of (x, y) = (0.41, 0.45) are achieved. Moreover, the application of different crystalline capping layers and alternative cathode materials aim at a scattering of light that further reduces the angular dependence of emission. Experiments with the crystallizing material BPhen and thin carbon nanotube films (CNT) are performed. Heated BPhen capping layer with a thickness of 250 nm show a lower color shift compared to the NPB reference capping layer. Using CNT films as cathode leads to a broadband white emission at a cavity thickness of 160 nm. However, due to very high driving voltages needed, the device shows low luminous efficacy. Finally, white top-emitting organic LEDs are successfully processed on metal substrates. A comparison of three and four color based hybrid devices reveal similar performance for the devices on glass and metal substrate. Only the devices on metal substrate show slightly higher leakaged currents. During repeated mechanical bending experiments with white devices deposited on 0.3 mm thin flexible Alanod substrates, bending radii up to 1.0 cm can be realized without device failure. / Diese Arbeit richtet ihren Schwerpunkt auf die Entwicklung von top-emittierenden weißen organischen Leuchtdioden (OLEDs), welche auch auf Metallsubstraten gefertigt werden können. Im Laufe der letzten Jahre wurden bottom-emittierende OLEDs sehr intensiv studiert, da sie vielversprechende Perspektiven für zukünftige kommerzielle Anwendungen in der Allgemeinbeleuchtung bieten. Trotz der Möglichkeit, OLEDs auch auf kostengünstigen lichtundurchlässigen Substraten fertigen zu können, blieb die Entwicklung von top-emittierenden Bauteilen dabei allerdings zurück. Dies läßt sich auf die enormen Herausforderungen von top-emittierenden OLEDs zurückführen, ein breites und ausgeglichenes weißes Abstrahlungsspektrum in Gegenwart einer Mikrokavität zu generieren. Die folgende Arbeit liefert einen Beitrag zum detaillierten Verständnis und der Optimierung von weißen top-emittierenden OLEDs. Zunächst werden die verfügbaren Metallsubstrate und abgeschiedenen Silberelektroden auf ihre Oberflächeneigenschaften und Morphologie mikroskopisch untersucht, um damit ihre Verwendbarkeit für organische Dünnfilmstrukturen in OLEDs einzuschätzen. Die Untersuchung zeigt eine Eignung von unbehandelten Alanod Metallsubstraten auf, welche eine niedrige Oberflächenrauigkeit und fast keine Oberflächendefekte besitzen. Bei den abgeschiedenen Silberelektroden zeigen Untersuchungen mit dem Rasterkraftmikroskop eine starke Beeinflussung der Oberflächenrauigkeit durch die Aufdampfrate. Im Hauptteil der Arbeit werden top-emittierende Dioden mit hybrid und voll-phosphoreszenter Architektur untersucht, in welcher drei oder vier Emittermaterialien verwendet werden, um eine optimale Leistungscharakteristik zu erreichen. Die Realisierbarkeit von top-emittierenden weißen OLEDs in Dioden erster und zweiter Ordnung wird durch optische Simulation am Beispiel einer dreifarb-OLED mit Hybridstruktur ermittelt. Dabei ist das Konzept der dielektrischen Deckschicht - aufgebracht auf die Kathode - ein essenzielles Kriterium für breitbandige und annähernd winkelunabhängige Lichtemission. Der Schwerpunkt im Hinblick auf die Untersuchung von hergestellten Dioden liegt in der Optimierung der organischen Schichtstrukturen, um hohe Effizienzen sowie exzellente warmweiße Farbqualität zu erreichen. Im Rahmen der Optimierung von hybriden Schichtstrukturen basierend auf drei Emittermaterialien resultiert die Verwendung eines kombinierten Aluminium-Silber Anodenspiegels in einer Lichtausbeute von 13.3 lm/W und einer externen Quanteneffizienz von 5.3 %.Eine optische Analyse mit Hilfe von Simulationen zeigt eine überlegene Stellung hinsichtlich der internen Quanteneffizient verglichen mit bottom-emittierenden Dioden ähnlicher Schichtstruktur. Die Dioden zeigen eine verstärkte vorwärts gerichtete Emission im Vergleich zu einem idealen Lambertschen Emitter, welche in hohem Maße für Beleuchtungsanwendungen erwünscht ist. Es kann eine ausgezeichnete Farbqualität erreicht werden - insbesondere für Dioden basierend auf einer reinen Aluminiumanode - mit Farbkoordinaten nahe der Planckschen Strahlungskurve und Farbwiedergabeindizes bis zu 77. Die weitere Einführung eines zusätzlichen gelben Emittermaterials verbessert die Lichtausbeute auf Werte von 16.1 lm/W und die externe Quanteneffizient auf 5.9 %. Mit der Wahl eines voll-phosphoreszenten Ansatzes unter der Verwendung eines orange-roten, hellblauen und grünen Emittermaterials werden Lichtausbeuten von 21.7 lm/W und externe Quanteneffizienten von 8.5 % erzielt. Damit werden Farbkoordinaten von (x, y) = (0.41, 0.45) erreicht. Darüberhinaus zielt die Verwendung von verschiedenen kristallinen Deckschichten und alternativen Kathodenmaterialien auf eine Streuung des ausgekoppelten Lichts ab, was die Winkelabhängigkeit der Emission vermindern soll. Experimente mit dem kristallisierenden Material BPhen und dünnen Filmen aus Kohlenstoffnanoröhren werden dabei durchgeführt. Geheizte BPhen Deckschichten mit einer Schichtdicke von 250 nm zeigen eine geringere Farbverschiebung verglichen mit einer NPB Referenzdeckschicht. Die Verwendung von Kohlenstoffnanoröhren als Kathode führt zu einer breitbandigen weißen Emission bei einer Kavitätsschichtdicke von 160 nm. Schließlich werden weiße top-emittierende organische Leuchtdioden erfolgreich auf Metallsubstraten prozessiert. Ein Vergleich von drei- und vierfarb-basierten hybriden Bauteilen zeigt ähnliche Leistungsmerkmale für Dioden auf Glas- und Metallsubstraten. Während wiederholten mechanischen Biegeexperimenten mit weißen Dioden auf 0.3 mm dicken flexiblen Alanodsubstraten können Biegeradien bis zu 1.0 cm ohne Bauteilausfall realisiert werden.

Bakgrund: De senaste tjugo åren har HR-rollen fått en mer strategisk inriktning men inte haft en stark position i ledningsgruppsmöten. HR-chefer, framförallt inom den privata sektorn, kan känna sig marginaliserade i ledningsgruppsmöten. Deras deltagande i dessa möten kan vara utmanande eftersom de inte alltid får lika stort utrymme som de andra medlemmarna. Det kan bero på att det finns en okunskap och ett ointresse hos de övriga medlemmarna i ledningsgruppen om hur HR-chefen kan bidra strategiskt. Även om HR-chefen blivit tilldelad en stol vid ledningsgruppsmöten kan deltagandet ändå vara tufft. En stol vid ledningsgruppsmöten behöver inte betyda att funktionens frågor blir prioriterade.  Syfte: Studiens syfte är att skapa en förståelse om hur HR-chefen kan stärka sin strategiska roll i ledningsgruppsmöten. Studien riktar främst in sig på HR-chefer inom privat sektor som arbetar i olika branscher. Metod: I studien användes en kvalitativ metod där studiens författare genomförde åtta semistrukturerade intervjuer med olika HR-chefer inom den privata sektorn. HR-cheferna som intervjuades arbetar inom olika branscher och har flera års erfarenhet av HR-arbete. Samtliga HR-chefer som deltagit i studien är medlemmar i verksamhetsledningen och har varit det sedan flera år. En abduktiv ansats användes för att hitta kopplingar mellan det teoretiska och det empiriska materialet.  Slutsats: Studiens slutsats blev att HR-chefers strategiska roll kan stärkas på flera olika sätt. Dels kan HR-chefen själv stärka rollens position och dels kan den stärkas beroende påandras uppfattning och inställning till rollen. Den kan också stärkas av faktorer som HR-chefen inte kan kontrollera, som exempelvis digitaliseringen / Background: For the past twenty years, the HR role has taken a more strategic focus but has not had a strong position in management team meetings. HR managers, especially in the private sector, can feel marginalized in management team meetings. Their participation in this kind of meetings can be challenging since they do not always get as much space as the other members. This may be because there is an ignorance and a lack of interest on the part of the other members of the management team about how the HR manager can contribute strategically. Even if the HR manager has been assigned a chair at management team meetings, participation can still be tough. A chair at the management team meetings does not mean that the function's issues are given priority. Purpose: The purpose of this study is to create an understanding of how the HR manager can strengthen their strategic role in management team meetings. The study mainly focuses on HR managers in the private sector who work in different industries. Method: The study used a qualitative method where the study's authors conducted eight semi-structured interviews with various HR managers in the private sector. The HR managers who were interviewed work in different industries and have several years of experience in the HR function. All HR managers who participated in the study are members of the management team and have been for several years. An abductive approach was used to find connections between the theoretical and the empirical material. Conclusion: The study concluded that the strategic role of HR managers can be strengthened in several different ways. On the one hand, the HR manager themselves can strengthen the role's position and on the other hand, it can be strengthened depending on others' perception and attitude to the role. It can also be strengthened by factors that the HR manager cannot control, such as digitalisation.

This cumulative dissertation includes three papers and one teaching case study. Together, they focus on topics highlighting the distinctiveness of family firms and new ventures. While the first paper analyzes the academic debate over the familiness concept in family firm research, the second paper focuses on explaining the unique relational dynamics between family and non-family managers in top management teams. The third paper aims to derive design designs for family firm specific corporate accelerators. The teaching case study shows how a growing new venture may strike a balance between coping with increasing organizational complexity and maintaining its distinct entrepreneurial spirit.

Title: Electroweak symmetry breaking by dynamically generated masses of quarks and leptons Author: Adam Smetana Department: Institute of Particle and Nuclear Physics, Faculty of Mathematics and Physics, Charles University Supervisor: Ing. Jiří Hošek, DrSc., Department of Theoretical Physics, Nuclear Physics Institute, Academy of Sciences of the Czech Republic Abstract: The aim of the thesis is to study models of the electroweak symmetry breaking caused by dynamically generated masses of quarks and lep- tons. (1) We perform the basic analysis whether the main underlying idea, that the masses of only known fermions can provide the elec- troweak symmetry breaking, is actually feasible. For that we elaborate a two-composite-Higgs-doublet model of the top-quark and neutrino condensation. The model suggests rather large number, O(100), of right-handed neutrinos. (2) We analyze the model of strong Yukawa dynamics where the dynamical fermion mass generation is provided by exchanges of new elementary massive complex doublet scalar fields. We focus on solving the coupled Schwinger-Dyson equations for fermion and scalar self-energies by means of approximative methods. We doc- ument that strongly hierarchical mass spectra can be reproduced. (3) We elaborate the flavor gauge model where the dynamical fermion mass...

The diploma thesis Europeanisation of Municipalities in the Czech Republic deals with the effects of membership in the European Union on the administrative structures of selected municipalities. This is a comparative case study of municipalities of various sizes and significance, namely the capital city of Prague, the statutory city of Pilsen and the city with extended powers Pisek. The aim of the thesis is to clarify which institutions in these municipalities manage the European agenda. The thesis follows three dimensions of the concept of Europeanisation (top-down; bottom-up and horizontal), which allows us to observe this issue from different angles. Research questions follow the logic of these three dimensions and the last research question focuses on comparing the Europeanisation of selected municipalities and identifying differences based on their size. The main source of the information was interviews with officials and politicians responsible for the European agenda in selected municipalities. The results of the work confirm the theoretical assumption that the size of municipalities has a significant impact on the management of the EU agenda. Financial and administrative capacities, the setting of European funds for the given city and the opinions of local political elites play the role...

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Entity augmentation is a query type in which, given a set of entities and a large corpus of possible data sources, the values of a missing attribute are to be retrieved. State of the art methods return a single result that, to cover all queried entities, is fused from a potentially large set of data sources. We argue that queries on large corpora of heterogeneous sources using information retrieval and automatic schema matching methods can not easily return a single result that the user can trust, especially if the result is composed from a large number of sources that user has to verify manually. We therefore propose to process these queries in a Top-k fashion, in which the system produces multiple minimal consistent solutions from which the user can choose to resolve the uncertainty of the data sources and methods used. In this paper, we introduce and formalize the problem of consistent, multi-solution set covering, and present algorithms based on a greedy and a genetic optimization approach. We then apply these algorithms to Web table-based entity augmentation. The publication further includes a Web table corpus with 100M tables, and a Web table retrieval and matching system in which these algorithms are implemented. Our experiments show that the consistency and minimality of the augmentation results can be improved using our set covering approach, without loss of precision or coverage and while producing multiple alternative query results.

Da Gama Textiles, based in the Eastern Cape has seen its sales of Jacquard products being affected in recent years by cheaper imported products. A study was required to enable its senior management to develop a branding strategy for its Jacquard products. In addition, senior managers required information about how to take advantage of the 2010 World Cup. Data collection was conducted in July to September 2009, using two population groups. The first one was bed and breakfast managers in KwaZulu-Natal, with the second one being top ten Jacquard customers by volume in South Africa. Results showed that awareness levels for Da Gama’s Jacquard products are low, although more than half of respondents would be willing to receive literature from Da Gama in the future relating to Jacquard products. Among the top ten customers, loyalty levels were found to be high, however customers were not satisfied with Da Gama’s price levels and felt that designs and delivery lead times could be improved. A suggested branding strategy was drafted, targeting both population groups. A strategy to build brand awareness and brand loyalty levels was suggested for bed and breakfast managers, while a strategy to improve brand loyalty levels was suggested for the top ten customers. / Business Administration / M. Tech. (Business Administration)

It is of paramount importance to our society that the environment, life style, science and amusement flourish together in a balanced way. Some trends in this direction are the increased utilization of renewable energy, like solar photovoltaics; better health care products, for example advanced biosensors; high definition TV or high resolution cameras; and novel scientific tools for better understanding of scientific observations. Advancement of micro and nanotechnologies has directly and positively impacted our stance in these application domains; one example is that of vertical periodic or aperiodic nano or micro pillar assemblies which have attracted significant research and industrial interest in recent years. In particular, Si pillars are very attractive due to the versatility of silicon. There are many potential applications of Si nanopillar/nanowire assemblies ranging from light emission, solar cells, antireflection, sensing and nonlinear optical effects. Compared to bulk, Si pillars or their assemblies have several unique properties, such as high surface to volume ratios, light localization, efficient light guiding, better light absorption, selective band of light propagation etc.      The focus of the thesis is on the fabrication of Si pillar assemblies and hierarchical ZnO nanowires on Si micro structures in top-down and bottom-up approaches and their optical properties and different applications. Here, we have investigated periodic and aperiodic Si nano and micro structure assemblies and their properties, such as light propagation, localization, and selective guiding and light-matter interaction. These properties are exploited in a few important optoelectronic/photonic applications, such as optical biosensors, broad-band anti-reflection, radial-junction solar cells, second harmonic generation and color filters.         We achieved a low average reflectivity of ~ 2.5 % with the periodic Si micropyramid-ZnO NWs hierarchical arrays. Tenfold enhancement in Raman intensity is also observed in these structures compared to planar Si. These Si microstructure-ZnO NW hierarchical structures can enhance the performance and versatility of photovoltaic devices and optical sensors. A convenient top-down fabrication of radial junction nanopillar solar cell using spin-on doping and rapid thermal annealing process is presented. Broad band suppressed reflection, on average 5%, in 300- 850 nm wavelength range and an un-optimized cell efficiency of 6.2 % are achieved. Our method can lead to a simple and low cost process for high efficiency radial junction nanopillar solar cell fabrication.            Silicon dioxide (SiO2) coated silicon nanopillar (NP) arrays are demonstrated for surface sensitive optical biosensing. Bovine serum albumin (BSA)/anti-BSA model system is used for biosensing trials by photo-spectrometry in reflection mode. Best sensitivity in terms of limit of detection of 5.2 ng/ml is determined for our nanopillar biosensor. These results are promising for surface sensitive biosensors and the technology allows integration in the CMOS platform.         Si pillar arrays used for surface second harmonic generation (SHG) experiments are shown to have a strong dependence of the SHG intensity on the pillar geometry. The surface SHG can be suitable for nonlinear silicon photonics, surface/interface studies and optical sensing.         Aperiodic Si nanopillar assemblies in PDMS matrix are demonstrated for efficient color filtering in transmission mode. These assemblies are designed using the ‘‘molecular dynamics-collision between hard sphere’’ algorithm. The designed structure is modeled in a 3D finite difference time domain (FDTD) simulation tool for optimization of color filtering properties. Transverse localization effect of light in our nanopillar color filter structures is investigated theoretically and the results are very promising to achieve image sensors with high pixel densities (~1 µm) and low crosstalk. The developed color filter is applicable as a stand-alone filter for visible color in its present form and can be adapted for displays, imaging, smart windows and aesthetic applications. / <p>QC 20160407</p>

During the past decades, CEO and board compensation has increased substantially. Top management compensation and firm performance has been an extensively researched subject, and a large amount of previous studies have examined the relation of top management pay and firm performance. However, the findings and discussions have been contradictory and inconsistent. The purpose of this thesis is to examine if there is a relationship between the top management variable compensation and firm performance. We aim to explore this subject in further depth by focusing on the Swedish context and by studying if contextual issues, in terms of different industries, have an impact on this relation. In order to examine this relation multiple regression analysis were performed. The empirical evidence displays that on a general level, incentive systems of the top management have no significant effect on firm performance. We also conclude that the relation of variable pay and performance is contingent on industry. We therefore argue that the context in which the firm operates has an impact on the investigated relation in this thesis. Furthermore, the Swedish context and the Swedish governance model can be considered as one of the main explanations of the attained result.