Submitted by Leonardo Medina (leo.medina@bol.com.br) on 2013-08-22T04:02:55Z No. of bitstreams: 1 Modelagem Paramétrica de Curvas de Crédito no Mercado Brasileiro.pdf: 1313931 bytes, checksum: bc46547efe94768915a9df1505ed510f (MD5) / Rejected by Vitor Souza (vitor.souza@fgv.br), reason: Falta a folha de aprovação assinada pela banca. on 2013-08-22T13:56:58Z (GMT) / Submitted by Leonardo Medina (leo.medina@bol.com.br) on 2013-08-23T03:38:20Z No. of bitstreams: 1 Modelagem Paramétrica de Curvas de Crédito no Mercado Brasileiro.pdf: 1349748 bytes, checksum: 1ddbd179f3eda6f4f272dc54002f83d5 (MD5) / Approved for entry into archive by Marcia Bacha (marcia.bacha@fgv.br) on 2013-09-10T13:27:46Z (GMT) No. of bitstreams: 1 Modelagem Paramétrica de Curvas de Crédito no Mercado Brasileiro.pdf: 1349748 bytes, checksum: 1ddbd179f3eda6f4f272dc54002f83d5 (MD5) / Made available in DSpace on 2013-09-19T18:32:54Z (GMT). No. of bitstreams: 1 Modelagem Paramétrica de Curvas de Crédito no Mercado Brasileiro.pdf: 1349748 bytes, checksum: 1ddbd179f3eda6f4f272dc54002f83d5 (MD5) Previous issue date: 2012-05-25 / Após a crise financeira de 2008, é perceptível a intensificação de esforços globais para aperfeiçoar métodos de avaliação de risco e ajuste de exposição de capital para tornar o sistema financeiro mundial mais sólido e consistente. O objetivo deste trabalho é propor um modelo de estimação de curvas de crédito privado no Brasil, aplicando a modelagem paramétrica de Nelson & Siegel (1987) a uma amostra de preços de debêntures. Os resultados obtidos poderão ser utilizados para auxiliar reguladores e profissionais de mercado com análises de risco, apreçamento de ativos ilíquidos e percepção de expectativas. / After the last financial crisis in 2008, global efforts to improve methods of risk analysis and capital exposure adjustment were intensified in order to make the global financial system more strong. This work proposes a model to estimate spread curves in Brazil, applying the Nelson & Siegel parametric model (1987) to a sample of debentures. These results may help regulators and market professionals with risk analysis, valuation of illiquid bonds and forecasts.

The purpose of this master thesis is to compare the company ContiTrade Services s.r.o. with its competitors between the years 2011 and 2014 by creating a ranking of selected tyre services. This thesis is divided into a practical section and a theoretical section. In the theoretical section are shown basic terms related to the intercompany comparison, the principles of the strategic tool Balanced Scorecard, the chosen indicators for the ranking and the methods of creating a rank within the intercompany comparison. In the practical section a spread (ROE - re), ROE, ROA, ROS, a turnover, a net profit, the amount of subsidiaries, the amount of services, an increase of tangible assets and labour costs are the basis for creating a ranking. These indicators are divided into four section according to the strategic tool Balanced Scorecard. There has been also created a complex ranking between the years 2011 and 2014 based on the above listed indicators.

Future fifth generation (5G) cellular networks have to cope with the expected ten-fold increase in mobile data traffic between 2015 and 2021. To achieve this goal, new technologies are being considered, including massive multiple-input multiple-output (MIMO) systems and millimeter-wave (mmWave) communications. Massive MIMO involves the use of large antenna array sizes at the base station, while mmWave communications employ frequencies between 30 and 300 GHz. In this thesis we study the impact of these technologies on the performance of channel estimators. Our results show that the characteristics of the propagation channel at mmWave frequencies improve the channel estimation performance in comparison with current, low frequency-based, cellular networks. Furthermore, we demonstrate the existence of an optimal angular spread of the multipath clusters, which can be used to maximize the capacity of mmWave networks. We also propose efficient noise variance estimators, which can be employed as an input to existing channel estimators.

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Ce travail de thèse porte sur la caractérisation et l'optimisation du spot de focalisation d'un objectif de microscope de grande ouverture numérique pour des applications d'imagerie super-résolue et de nanofabrication.Dans la première partie, nous avons systématiquement étudié les distributions de polarisation et d'intensité du faisceau laser dans la région du point focal en fonction de différents paramètres du faisceau incident tels que la phase, la polarisation, l’amplitude ainsi que l'influence du milieu de propagation, tel que l’indice de réfraction. Nous avons mis en oeuvre différentes méthodes théoriques pour contrôler et manipuler les distributions de polarisation et d'intensité du spot de focalisation. Ces prédictions théoriques sont vérifiées expérimentalement via un système optique confocal en mesurant l’image de fluorescence d’une nanoparticule d’or pour différentes caractéristiques.Dans la seconde partie de ce travail, une nouvelle microscopie basée sur le mécanisme d'absorption ultra-faible à un photon a été démontré théoriquement et expérimentalement. Le calcul théorique basé sur l'approche vectorielle de Debye, qui prend en compte l'effet d'absorption du matériau, montre qu'il est possible de focaliser le faisceau lumineux en profondeur à l'intérieur d'un matériau si celui-ci présente une absorption linéaire ultra-faible à la longueur d'onde d'excitation. Cette méthode, dite (LOPA), a ensuite permis de fabriquer des structures 2D et 3D submicrométriques, similaires à celles obtenues par la méthode utilisant l’absorption à deux photons. / Nowadays, far field optical microscopy is widely used in many fields, for fundamental research and applications. The low cost, simple operation, high flexibility are its main advantages. The key parameter of an optical microscope is the objective lens.This thesis's work focuses mainly on the characterization and optimization of the point spread function (PSF) of a high numerical aperture (NA) objective lens (OL) for applications of high resolution imaging and nano-fabrication.In the first part of the thesis, we have systematically investigated the dependency of polarization and intensity distributions of the focusing spot on numerous parameters, such as the phase, the polarization, and the beam mode of incident beam, as well as the refractive index mismatch. Then, we demonstrated theoretically different methods for manipulation of the polarization and intensity distributions of the focusing spot, which can have desired shapes and are useful for different applications. By using a home-made confocal microscope, we have experimentally verified some of the theoretical predictions, for example, vector properties of light beam under a tight focusing condition. In the second part of dissertation work, a new, simple and inexpensive method based on the one-photon absorption mechanism has been demonstrated theoretically and experimentally for 3D sub-micrometer imaging and fabrication applications. The theoretical calculation based on vectorial Debye approximation and taken into account the absorption effect of material shows that it is possible to focus the light tightly and deeply inside the material if the material presents a very low one-photon absorption (LOPA) at the excitation wavelength. We have then demonstrated experimentally that the LOPA microscopy allows to achieve 3D imaging and 3D fabrication with submicrometer resolution, similar to those obtained by two-photon absorption microscopy.

The thesis focuses on the ranking of ten largest companies in the Czech bakery industry. The ranking is made for the years 2012, 2013 and 2014 and it is based on the comprehensive evaluation methods, such as credibility models and spread (ROE - opportunity costs). Results are summarized in the conclusion. Marlenka international was evaluated as a company with the best financial situation.

This diploma thesis focuses on syndicated loans. It analyzes mostly the development of syndicated loans during last years from different points of view. Special attention is given to the syndicated loan market in Europe and USA. At the beginning of this paper, it is proved, that syndicated loans are important source of corporate financing. Most important characteristics of syndicated loans are mentioned after that. The chapter three deals with pricing of syndicated loans in the theoretical way. Next chapter concerns with trading of syndicated loans in secundary market in the USA. After that, syndicated loans are given to the relevance to credit derivates. Next chapter analyzes different asspects of the development of syndicated loans during last years. The chapter seven empirically proves the impact of financial crisis on syndicated loans market. There is also a comparison of spreads on syndicated loans market in Europe and USA. Last chapter focuses on the relationship between syndicated loans and GDP.

Shallowly embedded column base connections with unreinforced block out concrete are a common method of connecting steel columns to their foundation. There has been little research done to accurately quantify the effects of this block out concrete on the connection strength and rigidity, and therefore there is nothing to aid the practicing engineer in accounting for this in structural analysis. Due to this lack of understanding, engineers have typically ignored the effects of shallow block out concrete in their analysis, presumably leading to a conservative design. Recent research has attempted to fill this gap in understanding. Several methods have been proposed that seek to quantify the effects of shallow block out concrete on a column base connection. Barnwell proposed a model that predicts the strength of a connection. Both Jones and Tryon used numerical modeling to predict the rotational stiffness of the connection. An experimental study was carried out to investigate the validity of these proposed models. A total of 8 test specimens were created at 2/3 scale with varying column sizes, connection details, and embedment depths. The columns were loaded laterally and cyclically at increasing displacements until the connection failed. The results show that the strength model proposed by Barnwell is reasonable and appropriate, and when applied to this series of physical tests produce predictions that have an observed/predicted ratio of between 0.95 to 1.39. The results also show that methods for estimating the rotational stiffness of the connection at the top of the block out concrete, as proposed by Jones and Tryon also produce reasonable values that had observed/predicted ratios of between 0.93 to 1.47. An alternative model for determining a design value for the rotational stiffness of a shallowly embedded column base plate is also proposed. When the embedment depth to column depth ratio is greater than 1.22, the connection is sufficiently rigid and at small deflections (less than 1% story drift) may be accurately modelled with infinite rotational stiffness (a "fixed" connection) at the base of the column.

Spread Spectrum Communication techniques have been widely used in mobile and wireless communications. They have very beneficial features like antijam and security (noise-like character, pseudorandom codes usage). At first, the features of Spread Spectrum systems are described with emphasis on the Direct Sequence Spread Spectrum (DS-SS) scheme. Main specifications of UMTS system are also introduced. The goal of this thesis was to create the model of a physical layer UMTS suitable for investigation of disturbing signals influences in Matlab Simulink. This model was used to measure how the Bit error rate (BER) is affected by the Processing gain and the Signal-to-noise ratio. Finally, two important charts which describe the relation of Bit error rate versus the Processing gain and the Signal-to-noise ratio have been plotted.

This Thesis deals with a method to enforce the intellectual property rights and protect digital media from tampering – Digital Audio Watermarking. The main aim of this work is implement an audio watermarking algorithm. The theoretical part defined basic terms, methods and processes, which are used in this area. The practical part shows a process of embedding the digital signature into a host signal and her backward extraction. The embedding rule used spread spectrum technique and a psychoacoustic model. The implemented psychoacoustic model involves two properties of the human auditory system which are frequency masking and representation the frequency scale on limited bands called critical bands. The model is relatively new and based on the DWPT. In terms of above model is then the digital watermark embedded in the wavelet domain. This algorithm is implemented in technical software MATLAB. One part of this work focuses on robustness tests of the algorithm. Common signal processing modifications are applied to the watermarked audio as follows: Cutting of the audio, re-sampling, lossy compression, filtering, equalization, modulation effects, noise addition. The last part of the thesis presents subjective and objective methods usable in order to judge the influence of watermarking embedding on the quality of audio tracks called transparency.