O objetivo deste trabalho é estudar a influência dos parâmetros do processo de soldagem MAG com transferência do metal do tipo Curto-circuito Controlado (CCC) sobre a geometria do cordão de solda. Foi utilizado um dispositivo de soldagem automatizado para realização dos testes de simples deposição sobre um tubo de aço API 5L X65 diâmetro interno 204 mm e espessura 8 mm. Os parâmetros do processo analisados foram a corrente de pico de arco (Ia1), o tempo de atuação desta corrente (ta1), o tempo de atuação da corrente Ia2 (ta2), a velocidade de alimentação do arame (W) e a velocidade de soldagem (v). Tais parâmetros foram ajustados na interface homem-máquina (IHM) de uma fonte de potência microprocessada e do dispositivo de soldagem automatizado. As características geométricas do cordão de solda analisadas foram a largura, a altura do reforço e a penetração. Foi utilizado um Projeto de Experimento Composto de Segunda Ordem para obter a relação entre os parâmetros do processo e as características geométricas do cordão. Os modelos matemáticos obtidos foram considerados adequados, sendo possível determinar estatisticamente o nível de significância de cada um dos parâmetros controláveis – e de suas interações – sobre as respostas analisadas. Foram encontradas sobreposição e falta de fusão lateral em 60% dos corpos de prova avaliados, sendo levantada a hipótese de que a combinação de altos valores da corrente de pico de arco Ia1 com baixos valores do tempo de atuação deste parâmetro – ta1, aliada à utilização de gases de proteção com alta porcentagem de Ar, pode comprometer a eficiência de fusão nas laterais do cordão de solda. Os cordões de solda foram produzidos com quantidade reduzida de salpicos, representando um avanço do processo CCC quando comparado ao processo com transferência do metal por curto-circuito convencional. Os parâmetros controláveis Ia1 e ta1 produziram efeitos muito similares nas respostas de largura e penetração, quando considerados de forma isolada e também quando da interação destes com os demais parâmetros controláveis. A análise dos efeitos das interações principais revelou que Ia1 e ta1 são os parâmetros de maior influência nas respostas da geometria do cordão de solda, porém, com elevada dependência de um ajuste adequado da velocidade de alimentação do arame W para a obtenção de estabilidade do processo. / This work aims to study the influence of MAG welding process parameters with controlled short-circuit (CSC) metal transfer mode on weld bead geometry. The simple deposition weld tests were performed using a micro controlled power supply and an automatized device which enabled achievement of weld beads with standard conditions on API 5L X65 steel pipe whose inner diameter is 204 mm and thickness is 8 mm. The welding process parameters analyzed were the peak arcing current (Ia1), times (ta1) and (ta2), wire feed speed (W) and welding speed (v). Such parameters were set on Human-Machine Interface (HMI) of the micro controlled power supply and automatized welding device. The weld bead geometric features evaluated were width, reinforcement height and penetration depth. A Central Composite Face- Centred Design of Experiment was performed to obtain the relationship between the process parameters and the weld bead geometric features. Statistical analysis allowed development of mathematical models and they were found appropriate to determine the significance level of the process parameters – and their interactions – on output responses analyzed. Overlap and lack of fusion was detected on weld beads side in 60% of all specimens evaluated. The hypothesis formulated states that the origin of these discontinuities is from specific combination of parameters – high values of Ia1 and low values of ta1 together with usage of a shielding gas with high percentage of Ar – which would lead to lower fusion efficiency on weld bead side. The weld beads were produced with low spatter rates so it can be considered an improvement of the CSC process if compared with conventional short-circuit metal transfer mode. The peak arcing current Ia1 and time ta1 yielded similar effects on width and penetration depth, and it was valid when that parameters were taken both isolated and on interactions with other welding process parameters. The present study also revealed that Ia1 and ta1 are the most important parameters on influencing weld bead geometry, however, there is also strong dependence on a proper adjustment of wire feed speed W to obtain process stability.

O objetivo deste trabalho é estudar a influência dos parâmetros do processo de soldagem MAG com transferência do metal do tipo Curto-circuito Controlado (CCC) sobre a geometria do cordão de solda. Foi utilizado um dispositivo de soldagem automatizado para realização dos testes de simples deposição sobre um tubo de aço API 5L X65 diâmetro interno 204 mm e espessura 8 mm. Os parâmetros do processo analisados foram a corrente de pico de arco (Ia1), o tempo de atuação desta corrente (ta1), o tempo de atuação da corrente Ia2 (ta2), a velocidade de alimentação do arame (W) e a velocidade de soldagem (v). Tais parâmetros foram ajustados na interface homem-máquina (IHM) de uma fonte de potência microprocessada e do dispositivo de soldagem automatizado. As características geométricas do cordão de solda analisadas foram a largura, a altura do reforço e a penetração. Foi utilizado um Projeto de Experimento Composto de Segunda Ordem para obter a relação entre os parâmetros do processo e as características geométricas do cordão. Os modelos matemáticos obtidos foram considerados adequados, sendo possível determinar estatisticamente o nível de significância de cada um dos parâmetros controláveis – e de suas interações – sobre as respostas analisadas. Foram encontradas sobreposição e falta de fusão lateral em 60% dos corpos de prova avaliados, sendo levantada a hipótese de que a combinação de altos valores da corrente de pico de arco Ia1 com baixos valores do tempo de atuação deste parâmetro – ta1, aliada à utilização de gases de proteção com alta porcentagem de Ar, pode comprometer a eficiência de fusão nas laterais do cordão de solda. Os cordões de solda foram produzidos com quantidade reduzida de salpicos, representando um avanço do processo CCC quando comparado ao processo com transferência do metal por curto-circuito convencional. Os parâmetros controláveis Ia1 e ta1 produziram efeitos muito similares nas respostas de largura e penetração, quando considerados de forma isolada e também quando da interação destes com os demais parâmetros controláveis. A análise dos efeitos das interações principais revelou que Ia1 e ta1 são os parâmetros de maior influência nas respostas da geometria do cordão de solda, porém, com elevada dependência de um ajuste adequado da velocidade de alimentação do arame W para a obtenção de estabilidade do processo. / This work aims to study the influence of MAG welding process parameters with controlled short-circuit (CSC) metal transfer mode on weld bead geometry. The simple deposition weld tests were performed using a micro controlled power supply and an automatized device which enabled achievement of weld beads with standard conditions on API 5L X65 steel pipe whose inner diameter is 204 mm and thickness is 8 mm. The welding process parameters analyzed were the peak arcing current (Ia1), times (ta1) and (ta2), wire feed speed (W) and welding speed (v). Such parameters were set on Human-Machine Interface (HMI) of the micro controlled power supply and automatized welding device. The weld bead geometric features evaluated were width, reinforcement height and penetration depth. A Central Composite Face- Centred Design of Experiment was performed to obtain the relationship between the process parameters and the weld bead geometric features. Statistical analysis allowed development of mathematical models and they were found appropriate to determine the significance level of the process parameters – and their interactions – on output responses analyzed. Overlap and lack of fusion was detected on weld beads side in 60% of all specimens evaluated. The hypothesis formulated states that the origin of these discontinuities is from specific combination of parameters – high values of Ia1 and low values of ta1 together with usage of a shielding gas with high percentage of Ar – which would lead to lower fusion efficiency on weld bead side. The weld beads were produced with low spatter rates so it can be considered an improvement of the CSC process if compared with conventional short-circuit metal transfer mode. The peak arcing current Ia1 and time ta1 yielded similar effects on width and penetration depth, and it was valid when that parameters were taken both isolated and on interactions with other welding process parameters. The present study also revealed that Ia1 and ta1 are the most important parameters on influencing weld bead geometry, however, there is also strong dependence on a proper adjustment of wire feed speed W to obtain process stability.

Submitted by Aline Martins (1146629@mackenzie.br) on 2016-06-08T23:27:49Z No. of bitstreams: 2 license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) SERGIO RICARDO RODRIGUES.pdf: 1319157 bytes, checksum: ea04ee45aa98774a1df755c95a00ac38 (MD5) / Approved for entry into archive by Paola Damato (repositorio@mackenzie.br) on 2016-06-09T13:28:47Z (GMT) No. of bitstreams: 2 license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) SERGIO RICARDO RODRIGUES.pdf: 1319157 bytes, checksum: ea04ee45aa98774a1df755c95a00ac38 (MD5) / Made available in DSpace on 2016-06-09T13:28:47Z (GMT). No. of bitstreams: 2 license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) SERGIO RICARDO RODRIGUES.pdf: 1319157 bytes, checksum: ea04ee45aa98774a1df755c95a00ac38 (MD5) Previous issue date: 2016-03-24 / The present study investigated the stage of institutionalization and legitimacy in the adoption and implementation of a Shared Services Center (SSC) in a technology services business group, from the perspective of the institutional theory. The theoretical basis regarding the implementation was based on Tolbert and Zucker (1999) and Burns and Scapens (2000). The adoption study was based on the legitimation mechanisms observed by Scott (1987). The data was based on interviews conducted with eight executives responsible for decision-making of four companies of the group. The analyze of data was based on Bardin (2007) with the support of NVivo software. The analyze of results demonstrated that the implementation of SSC currently belongs to the stage of institutionalization of objectification, based on Tolbert and Zucker (1999), and the codification stage, based on Burns and Scapens (2000). The complete institutionalization did not happen due to a high degree of resistance to the new structure that certain groups demonstrated to higher administration, leading to the decentralization of the processes of accounts payable, accounts receivable and bank collection. Two mechanisms were identified for the adoption process: authorization and acquisition, which confirm the search of company for the legitimation. The main theoretical and empirical contributions of this research related to the understanding of the gaps between the processes of adoption and implementation, through of the identification of resistance key factors and possible reasons to direct actions to the full institutionalization of the SSC, and additionally, of the identification of elements for decision-making, with the purpose of achievement of strategic objectives. / Este estudo investigou o estágio de institucionalização e legitimação na adoção e implementação de Centro de Serviços Compartilhados (CSC) em um grupo empresarial de serviços de tecnologia, sob a óptica da teoria institucional. A base teórica em relação à implementação foi fundamentada em Tolbert e Zucker (1999) e Burns e Scapens (2000). O estudo da adoção foi fundamentado nos mecanismos de legitimação observados por Scott (1987). Os dados foram obtidos por meio de entrevista junto a oito profissionais responsáveis pela tomada de decisão pertencentes à quatro empresas do grupo. A análise dos dados foi baseada em Bardin (2007) e com apoio do software NVivo. A análise de resultados permitiu verificar que a implementação do CSC concentra-se atualmente no estágio de institucionalização de objetivação, com base em Tolbert e Zucker (1999), e no estágio de codificação, com base em Burns e Scapens (2000). A institucionalização total não ocorreu devido ao elevado grau de resistência de grupos à nova estrutura junto à alta administração da empresa, gerando a descentralização dos processos de contas a pagar, receber e cobrança. Para o processo de adoção, foram identificados dois mecanismos: autorização e aquisição, confirmando a busca da empresa pela legitimação. As principais contribuições teórico-empíricas desta pesquisa dizem respeito à compreensão da lacuna entre os processos de adoção e implementação, através da identificação dos principais fatores de resistências e possíveis causas para direcionar ações que permitam a completa institucionalização do CSC, e adicionalmente, da identificação de elementos para tomada de decisão a fim de se atingir objetivos estratégicos.

Submitted by Silvania Ribas (silvania@mackenzie.br) on 2018-04-12T13:46:07Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) LEANDRO ROCHA ROVAROTTO.pdf: 2216275 bytes, checksum: 8b05ad44625319114ebf0db9baa1454a (MD5) / Rejected by Paola Damato (repositorio@mackenzie.br), reason: Assuntos em cx alta on 2018-05-04T16:02:28Z (GMT) / Submitted by Silvania Ribas (silvania@mackenzie.br) on 2018-05-30T15:18:58Z No. of bitstreams: 1 LEANDRO ROCHA ROVAROTTO.pdf: 2216275 bytes, checksum: 8b05ad44625319114ebf0db9baa1454a (MD5) / Approved for entry into archive by Paola Damato (repositorio@mackenzie.br) on 2018-07-25T14:38:21Z (GMT) No. of bitstreams: 1 LEANDRO ROCHA ROVAROTTO.pdf: 2216275 bytes, checksum: 8b05ad44625319114ebf0db9baa1454a (MD5) / Made available in DSpace on 2018-07-25T14:38:22Z (GMT). No. of bitstreams: 1 LEANDRO ROCHA ROVAROTTO.pdf: 2216275 bytes, checksum: 8b05ad44625319114ebf0db9baa1454a (MD5) Previous issue date: 2017-05-30 / The intensification of market demands for strategic and operational actions aimed at optimizing the use of the available resources gave rise to the Shared Services Center (CSC), increasing the competitive advantage in the value chain of companies and collaborating to reach the strategic objectives of the organization. In this model, the administrative processes are usually centralized and the strategic decisions of the corporation are executed in parallel, with a greater focus on the business. The present study analyzes the challenges and opportunities for accounting and finance professionals in a post-deployment CSC environment in a multinational value transport company in Brazil, where transactional activities previously performed on local liability have been integrated into CSC overseas. It presents a review of the literature on the creation of a CSC and the new role of accounting and finance professionals in Brazil in this new post-implementation environment of the CSC. In this way, a research was developed with the professionals who experienced the process of implementation of the CSC in order to know the new attributions of these departments and their contribution to add greater added value to the business through structured researches with the professionals that control the new CSC in the States United and in Brazil Face to Face semi-structured interviews with both the professionals responsible for the control of the finance and accounting departments in Brazil and the Operational departments in which they represent the internal clients of these departments. It was verified that in general the changes in the local activities were minimal, but an important additional time occurred for the development of new activities or improvement of the already existing activities, opening the field for potential improvements by means of the information present in this study and my professional experience where Through the Matrix of Improvement developed in this study could boost the value added to the business in the Accounting and Finance departments in Brazil. / A intensificação das exigências do mercado para ações estratégicas e operacionais com vistas à otimização do uso dos recursos disponíveis deu origem ao Centro de Serviços Compartilhados (CSC), o que fez aumentar a vantagem competitiva na cadeia de valor das empresas e colaborou para o alcance dos objetivos estratégicos da organização. Neste modelo, normalmente, os processos administrativos são centralizados e as decisões estratégicas da corporação são executadas paralelamente, com maior foco no negócio. O presente estudo analisa os desafios e as oportunidades para os profissionais das áreas de contabilidade e de finanças após a implantação do CSC em uma empresa multinacional de transportes de valores no Brasil, na qual atividades transacionais antes executadas sobre responsabilidade local foram integradas ao CSC no exterior. Para isso, a pesquisa apresenta uma revisão da literatura sobre a criação de um CSC e o novo papel dos profissionais de contabilidade e de finanças, no Brasil, nesse novo ambiente pós-implantação do CSC. Deste modo, desenvolveu-se um estudo com os profissionais que vivenciaram o processo de implantação do CSC, com vistas a conhecer as atuais atribuições desses departamentos e a sua contribuição para agregar maior valor ao negócio, por meio de pesquisas estruturadas com os profissionais que controlam o novo CSC nos Estados Unidos e no Brasil. Foram realizadas entrevistas face a face semiestruturadas com os profissionais responsáveis pelo controle dos departamentos de finanças e de contabilidade no Brasil e de outros departamentos operacionais, cujos profissionais representam os clientes internos desses setores. Verificou-se que, de modo geral, as mudanças nas atividades locais foram mínimas, porém, ocorreu um acréscimo notório de tempo no desenvolvimento das novas atividades ou no aperfeiçoamento dos negócios já existentes. Como consequência, um novo campo foi aberto para melhorias potencialmente exploradas por meio do atrelamento das informações aqui apresentadas e a experiência profissional do autor dessa dissertação para o aperfeiçoamento da Matriz de Melhoria, a qual foi desenvolvida nessa pesquisa com a finalidade de intensificar a geração de valor agregado ao negócio nos departamentos de contabilidade e de finanças no Brasil.

The main goal of this Master's thesis is to estimate the value of the CSC Computer Sciences s.r.o. company to the date of 31st March 2015. To achieve this goal a strategic analysis, financial analysis, analysis of value generators and financial plan has been carried out. In this thesis the assets and the items of income statement have been divided as neccessary and unnecessary for company's operations to achieve more accurate statement of value, these two parts are separately evaluated and then sumed. The evaluation itself has been accomplished using DCF profit two stage method, which is divided into two parts that consist of a 5 year prediction phase and a residual value phase. The company has currently no long-term foreign capital that an interest has to be paid for, so the free cash flow to the firm equals the free cash flow to the equity. The final value of the company is then compared with the book value of assets.

Building has four floor and has cellar. There is a core with social maintance and flats. Like vertical communication there is two stairs and two lifts

This dissertation aims at theoretically studying a block of layers that is common in al- most all deep learning models. The block of layers of interest is the composition of an affine layer followed by a nonlinear activation that is followed by another affine layer. We study this block from three perspectives. (i) An Optimization Perspective. Is it possible that the output of the forward pass through this block is an optimal solution to a certain convex optimization problem? We show an equivalency between the forward pass through this block and a single iteration of deterministic and stochastic algorithms solving a ten- sor formulated convex optimization problem. As consequence, we derive for the first time a formula for computing the singular values of convolutional layers surpassing the need for the prohibitive construction of the underlying linear operator. Thereafter, we show that several deep networks can have this block replaced with the corresponding optimiza- tion algorithm predicted by our theory resulting in networks with improved generalization performance. (ii) A Probabilistic Perspective. Is it possible to analytically analyze the output of a deep network upon subjecting the input to Gaussian noise? To that regard, we derive analytical formulas for the first and second moments of this block under Gaussian input noise. We demonstrate that the derived expressions can be used to efficiently analyze the output of an arbitrary deep network in addition to constructing Gaussian adversarial attacks surpassing any need for prohibitive data augmentation procedures. (iii) A Tropi- cal Geometry Perspective. Is it possible to characterize the decision boundaries of this block as a geometric structure representing a solution set to a certain class of polynomials (tropical polynomials)? If so, then, is it possible to utilize this geometric representation of the decision boundaries for novel reformulations to classical computer vision and machine learning tasks on arbitrary deep networks? We show that the decision boundaries of this block are a subset of a tropical hypersurface, which is intimately related to a the polytope that is the convex hull of two zonotopes. We utilize this geometric characterization to shed lights on new perspectives of network pruning.

The enhanced expression of histone deacetylases (HDACs) in a variety of malignancies drew attention to investigate a new category of anti-cancer drugs that are based on the inhibition of those enzymes. Valproic acid (VPA) is a well-known antiepileptic drug that exhibits antitumor activities through inhibition of HDACs class I and IIa. Cancer stem cells (CSCs) have been recognized to drive the tumor growth and progression hence; attention has been given to target this small subpopulation of CSCs rather than the whole bulk tumor cells. CD133 is considered to be a CSC marker in several tumors and its transcription is strongly influenced by epigenetic changes that will be altered upon administration of histone deacetylase inhibitors (HDACi) in cancer treatment. Therefore, we evaluated the epigenetic and cytotoxic effects of treatment with 1 mM VPA in combination with other chemotherapeutics and its influence on the expression of CD133 in human neuroblastoma (NB) cell lines. Our results revealed that addition of VPA to DNA-damaging chemotherapeutics induced a synergistic anti-tumor effect that was associated with caspase-3 dependent induction of apoptosis in UKF-NB-4 cells. This synergism was related to the increase of the acetylation status of histones H3 and H4 and was only produced either by...

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This study provides valuable insights into the factors making an innovation hub attractive to potential tenants, with a specific emphasis on the role of cognitive social capital (CSC). Drawing on semi-structured interviews with industry professionals, the research uses thematic analysis to parse out key themes and sub-themes. It uncovers the multi-layered value offered by innovation hubs, highlighting the significance of not only tangible elements like physical infrastructure, but also intangible aspects such as networking, collaboration, knowledge, and learning opportunities. Moreover, the strategic role of an innovation hub in helping businesses meet their objectives is accentuated. The research delves deeper into CSC, revealing the intricate interplay of shared values and understanding, trust, and recognition in enriching the attractiveness of innovation hubs. Furthermore, the study suggests potential avenues for additional services, underscoring the desire for consultancy expertise and wellness facilities. The findings underscore the critical role innovation hubs play in fostering entrepreneurship and the potential they hold in contributing to economic development when they focus on building a supportive and interconnected community. The research not only illuminates the importance of CSC in the context of innovation hubs but also indicates future areas of investigation for scholars and practitioners alike.