Submitted by Ana Pliopas (analuisavieira@uol.com.br) on 2018-07-13T17:36:57Z No. of bitstreams: 1 Tese Ana Pliopas Final.pdf: 5918850 bytes, checksum: 095b485a22d53c9258dab0acec76ca83 (MD5) / Approved for entry into archive by Debora Nunes Ferreira (debora.nunes@fgv.br) on 2018-07-16T15:20:24Z (GMT) No. of bitstreams: 1 Tese Ana Pliopas Final.pdf: 5918850 bytes, checksum: 095b485a22d53c9258dab0acec76ca83 (MD5) / Approved for entry into archive by Suzane Guimarães (suzane.guimaraes@fgv.br) on 2018-07-16T16:47:42Z (GMT) No. of bitstreams: 1 Tese Ana Pliopas Final.pdf: 5918850 bytes, checksum: 095b485a22d53c9258dab0acec76ca83 (MD5) / Made available in DSpace on 2018-07-16T16:47:42Z (GMT). No. of bitstreams: 1 Tese Ana Pliopas Final.pdf: 5918850 bytes, checksum: 095b485a22d53c9258dab0acec76ca83 (MD5) Previous issue date: 2018-06-11 / Coaching é empregado por organizações para propiciar desenvolvimento a executivos, desde a década de oitenta, e seu uso aumenta desde então. A despeito da vasta utilização em organizações, os poucos estudos sobre as relações que se estabelecem entre o coachee, o coach e a organização evidenciam a complexidade dessas relações, em que há agendas múltiplas de jogos de poder. Há portanto oportunidade para o aprofundamento do entendimento de relações triangulares e diádicas em coaching executivo. Este estudo é relevante à medida que aprofunda o entendimento de uma prática organizacional frequentemente empregada, porém com poucos estudos sobre as relações entre coachees, coaches e organização. O estudo está fundamentado na perspectiva teórica do construcionismo social, que visa a entender como as pessoas dão sentidos ao mundo onde vivem e ao que fazem, ampliando assim as opções de entendimento de um fenômeno. A abordagem metodológica adotada foi a grounded theory, conduzida de maneira coerente com o construcionismo social. Os dados foram obtidos com entrevistas de 45 pessoas, sendo 16 coachees, 15 coaches e 14 profissionais de Administração de Recursos Humanos. Como resultado do estudo, três sentidos principais sobre as dinâmicas das relações entre o coachee, o coach e a organização foram elaborados. Primeiramente as relações triangulares e diádicas presentes em coaching executivo foram ressignificadas, com a sugestão de que as relações entre os diferentes atores em coaching executivo têm relevância e dinâmicas distintas. A relação entre o coach e o coachee é fundamental e a manutenção do sigilo do conteúdo das sessões de coaching primordial para a preservação de tal relação. Independentemente disso, a organização permeia a relação entre o coachee e e o coach, à medida que há expectativas de que contas sejam prestadas à organização. Também foi elaborado um contínuo no qual diferentes discursos de coaching foram posicionados. Esse contínuo chama atenção para um paradoxo de coaching executivo: quanto mais o processo de coaching se aproxima do discurso gerencial de coaching, dando mais atenção ao desenvolvimento de competências do executivo para atingir metas organizacionais, mais coaching assume um caráter instrumental, o que subtrai do coachee sua relevância no processo, com a potencialidade de tornar o processo de coaching inócuo. Finalmente há a proposição de uma dimensão vertical de coaching executivo acerca de temas que coaches e coachees percorrem em sessões de coaching. Esse sentido traz uma perspectiva integradora de coaching, no qual diferentes olhares permitem ao coachee elaborar sentidos sobre os temas de seu desenvolvimento. / Organizations have employed coaching to develop executives since the 1980s, and such practice has increased since then. Despite its wide use in organizations, there are few studies about the relationships established between the coachee, the coach and the organization, and such studies focus on the complexity of such relationships, in which there are multiple agendas of power games. Therefore, there is opportunity to deepen the understanding of triangular and dyadic relationships in executive coaching. This study is relevant as it deepens the understanding of a frequently employed organizational practice, but with few studies on the relationships between coachees, coaches and organization. The work is based on the social constructivist theoretical perspective, which aims to understand how people make sense of the world they live in and what they do, broadening, this way, the options for understanding a phenomenon. The methodological approach adopted was grounded theory, conducted in a manner consistent with social constructionism. Data were obtained with interviews of 45 people, being 16 coachees, 15 coaches and 14 professionals of Human Resources Administration. As result of the study, three main meanings on the dynamics of the relationships between the coachee, the coach and the organization were elaborated. Firstly, the triangular and dyadic relationships present in executive coaching were re-signified, suggesting that the relationships between the different actors in executive coaching have different dynamics and relevance. The relationship between the coach and the coachee is fundamental, and the maintenance of the confidentiality of the coaching sessions content, essential for preserving such relationship. Despite the importance of such relationship, the organization permeates the relationship between the coachee and the coach, since it is expected that coach and coachee will also comply with the interest of the organization. Another result elaborated from the study was a continuum, in which different coaching discourses were positioned. This continuum highlights a paradox present in executive coaching: the closer the coaching process is to the managerial discourse of coaching, prioritizing skills development to achieve organizational goals, the more coaching may assume an instrumental quality, subtracting the coachee’s relevance from the process. This has the potential to make the coaching process innocuous. Finally, a vertical dimension of executive coaching is proposed, which address topics that coaches and coachees go through during coaching sessions. This meaning offers an integrative perspective of coaching, in which different perspectives allow coachees to make meaning about their development.

Orientador: Plamen Emilov Koshlukov / Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Matematica, Estatistica e Computação Cientifica / Made available in DSpace on 2018-08-12T22:59:30Z (GMT). No. of bitstreams: 1 Goncalves_DimasJose_D.pdf: 561175 bytes, checksum: 463bf9f78a417a27d1bcf83549bc65a9 (MD5) Previous issue date: 2009 / Resumo: Nesta tese estudamos identidades polinomiais em álgebras associativas. Mais precisamente, estudamos as A-identidades satisfeitas por algumas classes importantes de álgebras. O primeiro resultado principal da tese consiste em uma descrição completa das A-identidades satisfeitas pela álgebra de Grassmann sobre um corpo algebricamente fechado e de característica o. Desta maneira respondemos em afirmativo a uma conjetura devida a Henke e Regev. Em seguida estudamos as A-identidades satisfeitas pela álgebra das matrizes triangulares superiores. Obtemos uma cota inferior para o grau mínimo de uma A-identidade satisfeita por tais álgebras. Como consequência obtemos uma resposta negativa a uma outra conjetura de Henke e Regev. Além disso, descrevemos as A-identidades de grau 5, da álgebra das matrizes triangulares superiores de ordem 2, e obtemos os graus mínimos de A-identidades satisfeitas por tais álgebras de ordem 3 e 4. / Abstract: In this PhD thesis we study polynomial identities in associative algebras. More precisely we study the A-ideIltities for several important classes of algebras. The first main result of the thesis gives a complete description of the A-identities for the Grassmann algebra over an algebraically closed field of characteristic O. In this way we give a positive answer to a conjecture due to Henke and Regev. Afterwards we study A-identities for the upper triangular matrix algebras. We give a lower bound for the minimal degree of an A-identity satisfied by such algebras. As a corollary we give a negative answer to another conjecture due to Henke and Regev. Furthermore we describe the A-identities of degree 5 for the upper triangular matrices of order 2 and compute the minimal degree of an A-identity for such algebras of order 3 and 4. / Doutorado / Algebra / Doutor em Matemática

The goal of this thesis has been to implement a hardware architecture for FPGA that calculates the fast Fourier transform (FFT) of a signal using one million samples. The FFT has been designed using a single-delay feedback architecture withrotators and butterflies, including a three-stage rotator with one million rotation angles. The design has been implemented onto a single FPGA and has a throughput of 233 Msamples/s. The calculated FFT has high accuracy with a signal to quantization noise ratio (SQNR) of 95.6 dB.

A triangular B-spline (DMS-spline)-based finite element method (TBS-FEM) is proposed along with possible enrichment through discontinuous Galerkin, continuous-discontinuous Galerkin finite element (CDGFE) and stabilization techniques. The developed schemes are also numerically explored, to a limited extent, for weak discretizations of a few second order partial differential equations (PDEs) of interest in solid mechanics. The presently employed functional approximation has both affine invariance and convex hull properties. In contrast to the Lagrangian basis functions used with the conventional finite element method, basis functions derived through n-th order triangular B-splines possess (n ≥ 1) global continuity. This is usually not possible with standard finite element formulations. Thus, though constructed within a mesh-based framework, the basis functions are globally smooth (even across the element boundaries). Since these globally smooth basis functions are used in modeling response, one can expect a reduction in the number of elements in the discretization which in turn reduces number of degrees of freedom and consequently the computational cost. In the present work that aims at laying out the basic foundation of the method, we consider only linear triangular B-splines. The resulting formulation thus provides only a continuous approximation functions for the targeted variables. This leads to a straightforward implementation without a digression into the issue of knot selection, whose resolution is required for implementing the method with higher order triangular B-splines. Since we consider only n = 1, the formulation also makes use of the discontinuous Galerkin method that weakly enforces the continuity of first derivatives through stabilizing terms on the interior boundaries. Stabilization enhances the numerical stability without sacrificing accuracy by suitably changing the weak formulation. Weighted residual terms are added to the variational equation, which involve a mesh-dependent stabilization parameter. The advantage of the resulting scheme over a more traditional mixed approach and least square finite element is that the introduction of additional unknowns and related difficulties can be avoided. For assessing the numerical performance of the method, we consider Navier’s equations of elasticity, especially the case of nearly-incompressible elasticity (i.e. as the limit of volumetric locking approaches). Limited comparisons with results via finite element techniques based on constant-strain triangles help bring out the advantages of the proposed scheme to an extent.

This work outlines the numerical strategies for two sets of problems of great importance in correlated materials research. First, we analyze the electronic structure and magnetic properties of 3d transition metals with linear coordination. Second, we study the mutiplet structure of 4f ions arranged on the 2D triangular-lattice.

My paper work deals with the 3D active triangular method of building reconstruction. First, there was a measuring triangular system created. Then the way of its automatic calibration was proposed and consequently also performed. Also algorithms for the automatic detection of the sample projected were proposed. Algoriths were presented with several sample buildings. The result of these algorithms are 3D models of individual buildings. In the end achieved results nd restrictions of the system proposed were assessed.

Some boundary value problems yield anisotropic solutions, e.g. solutions with boundary layers. If such problems are to be solved with the finite element method (FEM), anisotropically refined meshes can be advantageous. In order to construct these meshes or to control the error one aims at reliable error estimators. For isotropic meshes such estimators are known but they fail when applied to anisotropic meshes. Rectangular (or cuboidal) anisotropic meshes were already investigated. In this paper an error estimator is presented for tetrahedral or triangular meshes which offer a much greater geometrical flexibility.

From the viewpoint of the adaptive solution of partial differential equations a finit e element method on hierarchical triangular meshes is developed permitting hanging nodes arising from nonuniform hierarchical refinement. Construction, extension and restriction of the nonuniform hierarchical basis and the accompanying mesh are described by graphs. The corresponding FE basis is generated by hierarchical transformation. The characteristic feature of the generalizable concept is the combination of the conforming hierarchical basis for easily defining and changing the FE space with an accompanying nonconforming FE basis for the easy assembly of a FE equations system. For an elliptic model the conforming FEM problem is solved by an iterative method applied to this nonconforming FEM equations system and modified by projection into the subspace of conforming basis functions. The iterative method used is the Yserentant- or BPX-preconditioned conjugate gradient algorithm. On a MIMD computer system the parallelization by domain decomposition is easy and efficient to organize both for the generation and solution of the equations system and for the change of basis and mesh.

In this PhD thesis, the physics of vacancies in two-dimensional ordered Heisenberg antiferromagnets is investigated. We use semi-classical methods to study the influence of a single vacancy in long-range ordered states, with a focus on non-collinear order. Here, on a classical level, a magnetic distortion is created as the spins readjust in response to the vacancy. We use the non-collinear $120^\\circ$ state on the frustrated triangular lattice as an example, where we determine the impurity contributions to the magnetization and susceptibility. An important discovery is the vacancy moment not being quantized due to non-universal partial screening. The resulting effective moment $m_0 \\ll S$ can be observed as a fractional prefactor to an impurity-induced Curie response $m_0^2/(3k_BT)$ at finite temperature. This is in sharp contrast to collinearly ordered states. Here the moment is always quantized to the bulk spin value, $m_0=S$. Furthermore, we present a detailed analysis of the vacancy-induced distortion cloud. Due to Goldstone modes, it decays algebraically as $r^{-3}$ with distance $r$ to the vacancy. Using leading-order $1/S$-expansion, we determine the quantum corrections to both size and direction of the distorted magnetic moments. Secondly, we study the same problem in the presence of an external magnetic field $h$, both for the square and triangular lattice. For the triangular lattice we use a biquadratic exchange term $K$ to stabilize a unique ground state from a degenerate manifold. The finite-field vacancy moment $m(h)$ is generated by field-dependent screening clouds, as different non-collinear bulk states evolve with increasing field. These distortion clouds decay exponentially on a magnetic length scale $l_h\\propto 1/h$. Most importantly, we find that the magnetic-field linear-response limit $h \\rightarrow 0^+$ is generically singular for $SU(2)$ ordered local-moment antiferromagnets, as the vacancy moment in zero field differs fundamentally from even an infinitesimal but finite field, $m(h \\rightarrow 0^+)\\neq m_0$. Moreover, a part of the screening cloud itself becomes universally singular. Particularly for spin-flop states, this leads to a semi-classical version of perfect screening. We present general arguments to support these claims, as well as microscopic calculations. Another remarkable result is an impurity-induced quantum phase transition for overcompensated vacancies in the $M=1/3$ plateau phase on the triangular lattice with $K<0$. We close our analysis with a discussion about important limits for finite vacancy concentrations, as well as a possible experimental verification of our predictions.

The second term of the presidency of Barack Obama was an active phase of interactions among Russia, the United States, and China. At that time, many issues came up to be able to shake the international situation (e.g., the rise of ISIS, the South China Sea issue, the THAAD, TPP, Ukrainian crisis). The author selected four issues (trade, counterterrorism, the South China Sea issue, the THAAD) to analyze how the states were interacting among themselves (Russia-US, US-China, China-Russia) and how it influenced the international order. Two basic international theories will be applied - realism and liberalism (offensive realism, neo-liberal institutionalism, economic interdependency, and theory of triangle) to understand the interactions and discuss them.