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Submitted by Setor de Tratamento da Informa??o - BC/PUCRS (tede2@pucrs.br) on 2016-10-06T11:11:45Z No. of bitstreams: 1 DIS_THAIS_CRESTANI_COMPLETO.pdf: 3613694 bytes, checksum: 40503ab7961f50b87d67545be969f402 (MD5) / Made available in DSpace on 2016-10-06T11:11:46Z (GMT). No. of bitstreams: 1 DIS_THAIS_CRESTANI_COMPLETO.pdf: 3613694 bytes, checksum: 40503ab7961f50b87d67545be969f402 (MD5) Previous issue date: 2016-07-07 / The typical solar cells of the industry are fabricated in p-type crystalline silicon wafers and have a pn junction at one side and, on the other side, the back surface field (BSF). The objective of this work is to develop solar cells with aluminum and boron selective back surface field to enable the passivation on the rear face with an industrial process. Czochralski p-type silicon wafers of solar grade quality were used. The boron diffusion was performed on the whole back side of the silicon wafers and the aluminum was screen-printed to form the selective back surface field under the metal grid. The boron diffusion temperature and time, the firing temperature of the metal pastes, the percentage of the rear area covered with aluminum and the passivation with SiO2 were evaluated in the electrical parameters. The best boron diffusion temperature was 970 ? C for 20 minutes and firing temperature of the metal pastes was 870 ? C. The solar cell with the highest efficiency were obtained for a rear metal grid with 14 % of the area covered by aluminum. The passivation by SiO2 on both surfaces increased the minority charge carrier diffusion length from 490 ?m to 665 ?m. Consequently, the passivation increased the efficiency from 15.6 % to 16.1 %, as a result of an increasing of the fill factor and the open circuit voltage. The passivation also increased the internal quantum efficiency in the range of violet/blue wavelengths as well as in the near infrared region. / As c?lulas solares t?picas da ind?stria s?o fabricadas em sil?cio cristalino tipo p e possuem uma jun??o pn em uma das faces, e na outra face, ? formado o campo retrodifusor. O objetivo deste trabalho foi desenvolver c?lulas solares com o campo retrodifusor seletivo de alum?nio e boro para possibilitar a passiva??o na face posterior, com processo industrial. Foram utilizadas l?minas de sil?cio Czochralski tipo p, grau solar. A difus?o de boro foi realizada em toda a face posterior da l?mina de sil?cio e por serigrafia foi depositada a pasta de alum?nio para formar o campo retrodifusor seletivo nas trilhas met?licas. Avaliou-se influ?ncia da temperatura e do tempo de difus?o de boro, a temperatura de queima das pastas met?licas, o percentual da ?rea posterior recoberta por alum?nio e a passiva??o com SiO2 nos par?metros el?tricos. A melhor temperatura de difus?o de boro foi de 970 ?C durante 20 minutos e a temperatura de queima das pastas met?licas foi de 870 ?C. A c?lula com maior efici?ncia foi obtida com a malha posterior com ?rea de recobrimento de alum?nio de 14%. A passiva??o com SiO2 em ambas as superf?cies aumentou a efici?ncia e o comprimento de difus?o dos portadores de carga minorit?ria aumentou de 490 ?m para 665 ?m. Com a passiva??o, a efici?ncia aumentou de 15,6 % para 16,1 %, devido ao aumento do fator de forma e da tens?o de circuito aberto. A passiva??o tamb?m aumentou a efici?ncia qu?ntica interna no intervalo de comprimento de onda do violeta/azul bem como na regi?o do infravermelho pr?ximo.

Submitted by Celso Magalhaes (celsomagalhaes@ufrrj.br) on 2018-08-20T15:16:29Z No. of bitstreams: 1 2009 - Elaine Vieira Lacerda.pdf: 2245011 bytes, checksum: 5a1b3471f7a828b912bae5ca7e93279b (MD5) / Made available in DSpace on 2018-08-20T15:16:29Z (GMT). No. of bitstreams: 1 2009 - Elaine Vieira Lacerda.pdf: 2245011 bytes, checksum: 5a1b3471f7a828b912bae5ca7e93279b (MD5) Previous issue date: 2009-12-18 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / This dissertation has the objective to exam the Sistemic Ideology of the Agroneg?cio in the Brazilian Agribusiness Association, as well as, the action of the mentioned Association in the search for a institutionality formatation favourable to the organizational model broadcasted by the Agribusiness idea, which has been, in the last time, reframed as Sustentable Agricultural. An Exercise that reflects a continous effort to the construction and consolidation of the rural business hegemony in a capital imagetization context, where marketing specialists assume a fundamental role in the conflictive production of consensus. The mentioned object was examined through the Gramscian reference, once that, it permits dealing with the fundamental elements in the apprehension of the process for the construction of the hegemony. In this direction, the ABAG ideologics structures relevances were considered and its authors/actors action in the contest for the brazilian New Rural definition, materialized organically in a System figure. My analysis is in the period that comprehends from 1990 untill 2008. This period is marked by changes, result of the technical agricultural basis modernization, which has impacted profoundely the social relationships. Context in which to think about the power relations identifying the legitimizing basis of one of the politics actors of the brazilian rural business, assumes the strategic function to make us understand a scheme subjected to hybris and marked by the continous fight for hegemony / Esta disserta??o tem como objetivo examinar a Ideologia Sist?mica do Agroneg?cio na Associa??o Brasileira de Agribusiness, bem como a a??o da referida Associa??o na busca pela formata??o de uma institucionalidade favor?vel ao modelo organizacional difundido pelo conceito de Agribusiness o qual tem sido, nos ?ltimos tempos, ressignificado enquanto Agricultura Sustent?vel. Exerc?cio que reflete um esfor?o cont?nuo para a constru??o e consolida??o da hegemonia do empresariado rural num contexto de imagetiza??o do capital, onde especialistas em marketing assumem papel fundamental na produ??o conflitiva do consenso. O referido objeto foi examinado ? luz do referencial gramsciano uma vez que este permite tratar dos elementos fundamentais na apreens?o do processo de constru??o da hegemonia. Nesse sentido, foram consideradas a relev?ncia das estruturas ideol?gicas da ABAG e a a??o de seus autores/atores num contexto de defini??o do Novo Rural brasileiro, organicamente materializado na figura de um Sistema. Minha an?lise encontra-se circunscrita ao per?odo que compreende os anos de 1990 at? o ano de 2008. Per?odo marcado por modifica??es, fruto da moderniza??o de base t?cnica da agricultura, as quais t?m impactado profundamente as rela??es sociais. Contexto no qual refletir sobre as rela??es de poder identificando os fundamentos legitimadores de um dos atores pol?ticos do empresariado rural brasileiro, assume fun??o estrat?gica para compreendermos um regime sujeito ? hybris e marcado pela constante luta por hegemonia

For decades, the importance of information technology (IT) for organizations has continuously increased. To ensure effective IT management and operations, to enable the business, and to stay competitive, many large organizations appoint a Chief Information Officer (CIO) as their highest-ranked IT executive (Preston et al., 2008). While many small to medium-sized enterprises (SMEs) face similar challenges concerning IT, they often lack the resources to employ a full-time IT executive (Bhagwat & Sharma, 2007; Cragg et al., 2013). However, Kamariotou and Kitsios (2022) find that strategic planning and alignment with IT are important determinants for increasing an SME’s business value. An increasing number of SMEs started to employ CIOs part-time to avoid the risk of not staying competitive and losing business value (Moise, 2021; Pratt, 2022). Such so-called “Fractional CIOs” are often highly experienced and skilled individuals working for multiple SMEs simultaneously (Kratzer et al., 2022). By contracting a Fractional CIO, SMEs benefit in various ways. First, they get an experienced IT leader at a fraction of the cost. Second, they remain flexible concerning billable hours and the time horizon of the engagement. Third, they are receiving an outside-in perspective and might profit from the Fractional CIO’s experience gained from simultaneous engagements. Even though the Fractional CIO role benefits SMEs, adoption and awareness are still low. Further, substantial research on the novel role is missing. This dissertation aims to establish a new stream in CIO research that explores the role of the Fractional CIO. Our comprehensive literature review of the CIO research field provides the basis for this research (Kratzer et al., 2023b). As we explore this novel phenomenon, we are also interested in how to best report research findings. We, therefore, aim to conceptualize techniques to convey novel phenomena in information systems (IS) research in an illustrative way. Hence, we posed the following overarching research questions: RQ1: How can novel phenomena be communicated in an illustrative yet rigorous way in research papers? RQ2: What is the state-of-the-art in the CIO research field, and what are further avenues for research? RQ3: What concepts provide SMEs with the experienced IT executive management they need? RQ4: What makes Fractional CIO engagements successful? RQ5: How does the role of the Fractional CIO take shape in practice in the German market? These overarching research questions are answered through six consecutive publications. 1) 'Literary Sketches in Information Systems Research: Conceptualization and Guidance for Using Vignettes as a Narrative Form' This paper is conceptual and has a methodological focus on the use of vignettes. The paper contributes to the usage of vignettes as a narrative form in academic research, providing a taxonomy that structures vignettes and identifies three archetypes. By conceptualizing vignettes through a taxonomy and archetypes, we create transparency for the usage of vignettes, encourage the use of vignettes, and provide recommendations how to use them more rigorously. Long term, this might contribute to a better exchange between academia and practice through better comprehensibility of academic papers. 2) 'Four Decades of Chief Information Officer Research: A Literature Review and Research Agenda Based on Main Path Analysis' In this paper, we conducted a bibliographic literature review using main path analysis, which helped to objectively identify existing topics based on their importance. We also illustrated the knowledge flow in CIO research by identifying major and emerging research streams and analyzing their evolution over time. Additionally, we aggregated central papers in CIO research and developed a research agenda to provide guidance for future research. Overall, this paper helps to advance the understanding of the CIO research field and provides insights for researchers and practitioners. 3) 'The Fractional CIO in SMEs: Conceptualization and Research Agenda' With this paper, we were the first to conceptualize the role of the Fractional CIO and to develop a research agenda for this novel research field. The results from this paper contribute to research and practice in several ways. First, we are the first authors to conceptualize the role of the Fractional CIO, derive a definition, compare it to existing CIO role research, and derive four engagement types. Second, we develop a research agenda to guide future research in the new Fractional CIO research field. Third, we contribute to practice by promoting the role’s awareness among potential Fractional CIOs and organizations. Fourth, we show that Fractional CIO services are versatile and can benefit organizations of different sizes and maturity levels, and there are diverse possibilities for evolution. 4) 'What Makes Fractional CIO Engagements in SMEs Successful? – A Research Framework' In this paper, we developed a research framework for Fractional CIO engagement success. It makes contributions to research and practice. First, we propose a research framework for Fractional CIO engagement success and, therefore, develop a common ground for future research. Second, we provide practical advice for Fractional CIOs and SMEs regarding factors for engagement success. Third, we raise awareness about the Fractional CIO role that may benefit many SMEs around the world. 5) 'Factors for Fractional CIO Engagement Success' In this paper, we used Q-methodology to empirically evaluate the relative importance of factors influencing Fractional CIO engagement success and to identify different viewpoints on engagement success. Our paper makes several contributions to research and practice. First, our paper is the first to identify and evaluate the importance of factors for Fractional CIO engagement success. Therefore, it serves as a basis for further research in the new Fractional CIO research field. Second, we find that upper echelon theory (Hambrick & Mason, 1984) can be applied to executives independent of their contractual relationship in cases of comparable responsibilities. Third, by thoroughly applying Q-methodology, we showcase an exploratory tool for identifying opinions and preferences of participants and clustering them accordingly. This approach provides guidance for other IS scholars to apply it. Fourth, we develop preliminary archetypes of Fractional CIOs and, based on that, provide tentative advice for Fractional CIOs and organizations that hire them. These preliminary archetypes enabled us to identify further theoretical explanations of this phenomenon. In addition to transaction cost theory, agency theory, and upper echelon perspective, we found that stewardship theory and dynamic capabilities explain additional characteristics of Full-ownership CIOs and Change Agents. 6) 'Mehr als Vollzeit: Fractional CIOs in KMUs' This paper summarizes the results of our previous studies regarding the Fractional CIO role in German language and conducts semi-structured interviews with three Fractional CIOs from Germany to complement it with a perspective on the German market. Overall, we find that the Fractional CIO role in the German market is performed similarly to the international market. The interviewed German Fractional CIOs/CTOs could not clearly identify any hurdles that might explain the low adoption of the role. However, all three German Fractional CIOs agree that German SMEs would strongly benefit from Fractional CIOs. (References to be found in the full text)

O papel dos profissionais que atuam com Tecnologia da Informação (TI) nas organizações tem passado por diversas transformações e os Gestores de TI que atuavam especificamente em questões táticas e operacionais nas áreas mais técnicas, passaram também a ser envolvidos em decisões estratégicas envolvendo a TI. Assim, durante esta transformação os profissionais de TI deixaram os CPDs e passaram a estar mais presentes e próximos a outros setores da organização, com por exemplo a área de negócio. Em 2006, Lee e Lee, mapearam as competências para os Gestores de TI como sendo Técnica, Negócio e Sistema e no mesmo ano Wu et al. (2006), identificaram a competência estratégica como parte das atividades críticas do Gestor de TI. O CIO (Chief Information Officer) é o nome dado atualmente ao responsável pela tecnologia da informação numa organização e suas competências essenciais foram mapeadas nos estudos de Vreuls (2009) e Vreuls e Joia (2012) como sendo: Visão de negócio, Suporte ao negócio, Capacidade de influenciar a organização, Capacidade técnica, Networking externo, Gestão da operação de TI e Visão inovadora. Assim, a partir da evolução das competências dos Gestores de TI, a pesquisa analisou, através de um estudo de caso, como as competências dos Gestores de TI se aproximam das competências do CIO. Além de tomar por base os estudos de Lee e Lee (2006), Wu et al. (2006) e Vreuls (2009), também foi realizada uma análise comparativa com o modelo clássico de Katz (1974) Com a escolha destes modelos teóricos foi realizado um estudo comparativo entre a evolução dos estudos sobre competências gerenciais em diversos níveis. Os dados primários foram coletados por meio de entrevistas semiestruturadas e observação participante e os dados secundários foram obtidos através de fontes documentais do caso estudado. A análise dos dados foi realizada através da análise de conteúdo. Os resultados deste estudo indicam que as competências dos Gestores de TI se aproximam de três das sete competências do CIO e que apesar de estarem nos níveis táticos ou operacionais tem uma participação na área estratégica, o que implica no desenvolvimento dos Gestores de TI e também podem servir como um guia para atração e retenção de talentos na gestão de TI. / The role of Information Technology (IT) professionals in organizations has undergone many transformations, and IT Managers who have been specifically involved in tactical and operational issues in more technical areas have also become involved in strategic decisions involving IT. Thus, during this transformation IT professionals left the CPDs and became more present and close to other sectors of the organization, for example the business area. In 2006, Lee and Lee mapped the competencies for IT Managers as Technical, Business and System and in the same year Wu et al. (2006) identified the Strategic competence as part of the IT Manager's critical activities. The CIO (Chief Information Officer) is the current name given to the head of information technology in an organization and its core competencies have been mapped in the studies of Vreuls (2009) and Vreuls and Joia (2012) as: Business vision, Business support, Ability to influence the organization, Technical capacity, External networking, IT operation management and Innovative vision. Thus, from the evolution of the competences of the IT Managers, the present study analyzed through a case study how the competences of the IT Managers approach the competencies of the CIO In addition to Lee and Lee (2006), Wu et al. Al (2006) and Vreuls (2009), a comparative analysis was also carried out with the classic Katz model (1974). With the choice of these theoretical models, a comparative study was carried out between the evolution of the studies on managerial competences at several levels. The primary data were collected through semi-structured interviews and participant observation, and the secondary data were obtained through documentary sources of the case studied. Data analysis was performed through content analysis. The results of this study indicate that the competencies of IT Managers approach three of the CIO's seven competencies and that although they are at tactical or operational levels, they have a participation in the strategic area, which implies the development of IT Managers and can also serve as a guide for attracting and retaining talent in IT management.

Submitted by Sara Ribeiro (sara.ribeiro@ucb.br) on 2017-04-18T14:03:26Z No. of bitstreams: 1 MarceloPereiraMagalhaesdeSalesTese2016.pdf: 33116858 bytes, checksum: d66cc0e5bd4a2a18939274bbf98efba8 (MD5) / Approved for entry into archive by Sara Ribeiro (sara.ribeiro@ucb.br) on 2017-04-18T14:04:52Z (GMT) No. of bitstreams: 1 MarceloPereiraMagalhaesdeSalesTese2016.pdf: 33116858 bytes, checksum: d66cc0e5bd4a2a18939274bbf98efba8 (MD5) / Made available in DSpace on 2017-04-18T14:04:52Z (GMT). No. of bitstreams: 1 MarceloPereiraMagalhaesdeSalesTese2016.pdf: 33116858 bytes, checksum: d66cc0e5bd4a2a18939274bbf98efba8 (MD5) Previous issue date: 2016-02-29 / Diabetes is associated with endothelial dysfunction and several cardiovascular disorders, such as systemic arterial hypertension. Moreover, hypertension and diabetes coexist very frequently, as 60-65% of diabetics are hypertensive. The coexistence of hypertension and diabetes can reduce endothelium-mediated vasodilatation, which can be partially explained by a reduced production of nitric oxide (NO) or a decreased response to NO in the vascular smooth muscle. On the other hand, it has been shown that a single session of exercise can promote significant reductions in blood pressure (BP). This occurrence is known as post-exercise hypotension (PEH) and appears to be associated with the activity of the kallikrein-kinin system and release of NO. Although studies have observed PEH in individuais with T2D the molecular mechanisms have not been fully elucidated. ln addition, the prescription of exercise intensities based on lactate threshold (L T) has been suggested for individuais with T2D.Moreover, in spite of previous studies showing that individuais with T2D exhibit PEH when exercising at intensities around LT , There is evidence that subjects with T2D exhibit lower plasma kallikrein activity (PKA) compared to healthy individuais, suggesting that lower NO release and reduced endothelium-dependent vasodilation would be occurring in response to exercise for this population. However, no investigations were made on the integrated responses of PKA, BK, dessArg9-BK and NO and its association to the occurrence of PEH in individuais with or without T2D.Furthermore, to the best of our Knowledge, there is only one study that has investigated the effects of exercise (aerobic and / or resistance) on the 24-hour BP response in individuais with T2D. Not to mention that it is not of our knowledge, studies that have investigated the effects of different aerobic exercise intesities on BP 24 hours in subjects with T2D.Additionally, Several studies have investigated the effects of different exercise modes ( e.g., aerobic vs. resistance ), intensities, and durations on BP responses during the post-exercise recovery period. Studies regarding the effects of different sports modalities, especially martial arts, have also been performed, such as: Tai Chi Chuan, Jiu Jitsu, and Judo. However, until now, no study has explored the BP responses after a single Contact Karate (CK) session. It is worth mentioning that the scientific literature related to combat sports has hardly been explored, especially regarding health-related variables (i.e., post-exercise BP reduction). Most studies have investigated performance-related parameters in athletes, making the evaluation of health-related variables (such as PEH) a scientific gap. Therefore, investigations related to this issue have been strongly encouraged. It should be noted that given the known complications of type 2 diabetes and characteristics of sport (high physical contact of high impact), it is wise to initially investigate the effects of a contact karate session on the blood pressure response after exercise in apparently healthy subjects and then, if possible, in special populations as diabetes and hypertension. With regard to chronic exercise, in particular the resistance exercise, the available literature concerning their effects on the response of NO and, in tum, on BP in individuais with T2D, it is still incipient. To the best of our knowledge, there have been only two randomized clinical trials ofRT's effects on NO concentration and BP levels in T2D patients, only one of which, verified the NO response (along with BP) due to R T. Therefore, there is an apparent lack of evidence on R T' s effects on the responses of NO and BP in T2D patients. Objectives: Study 1) to investigate and compare the responses of PKA, BK, desArg9-BK, NO and BP after a single session of moderate-intensity aerobic exercise in T2D and non-diabetic (ND) individuais; study 2) To verify the effects of different intensities of aerobic exercise on 24-hour ambulatory BP responses in individuais with T2D and prehypertension; study 3) to verify the effects of a Contact Karate (CK) session on BP responses during a post-exercise recovery period in young adults; study 4) to determine the effects of eight weeks RT on the responses of NO and BP in T2D patients and their controls peers. Methods: study l)Ten subjects with T2D and 10 Non-diabetics (ND) underwent three sessions: 1) maximal incremental test on cycle ergometer to determine lactate threshold (L T); 2) 20- min of constant-load exercise on cycle ergometer, at 90% LT and; 3) control session. BP and oxygen uptake were measured at rest and at 15, 30 and 45 min post-exercise. Venous blood samples were collected at 15 and 45 minutes of the recovery period for further analysis of PKA, BK and desArg9-BK. NO was analyzed at 15 minutes post exercise. Study 2) ten individuals with T2D and prehypertension completed three sessions applied in random order: non-exercise control (CON) and exercise at moderate (MOD) and maximal (MAX) intensities. Heart rate (HR), BP, blood lactate concentrations ([Lac ]), oxygen uptake (VO2), and rate of perceived exertion (RPE) were measured at rest, during the experimental sessions, and during the 60 min recovery period. After this period, ambulatory blood pressure was monitored for 24 h. Study 2) ten individuals with T2D and prehypertension completed three sessions applied in random order: non-exercise control (CON) and exercise at moderate (MOD) and maximal (MAX) intensities. Heart rate (HR), BP, blood lactate concentrations ([Lac ]), oxygen uptake (VO2), and rate of perceived exertion (RPE) were measured at rest, during the experimental sessions, and during the 60 min recovery period. After this period, ambulatory blood pressure was monitored for 24 h. Study 3) Thirty-two male CK athletes volunteered and underwent one CK session (50 min) anda control session. BP was measured during rest (before sessions), as well as on the 15th, 30th, 45th, and 60th min of the post-exercise recovery. Study 4) We performed eight-weeks of randomized controlled trial in T2D patients and ND individuals. After initial screening, were randomly allocated into four groups: (1) trained T2D (T2DTRAINED; n = 9), (2) trained ND (NDTRAINED; n = 10), (3) control T2D (T2DCON; n = 8) and (4) control ND (NDCON; n = 7). NO and BP were determined before and after the intervention. Results: study 1) The ND group presented PEH of systolic blood pressure (SBP) and mean arterial pressure (MAP) on the 90% L T session but T2D group did not. Plasma NO increased ~24.4% for ND and ~13.8% for T2D group 15min after the exercise session. Additionally, only ND individuais showed increases in PKA and BK in response to exercise and only T2D group showed increased desArg9-BK production. Study 2) Compared with CON, only MAX elicited post-exercise BP reduction that lasted for 8 h after exercise and during sleep. Study 3) The SBP, diastolic blood pressure, and MAP were significantly lower at the post-exercise period compared to pre-exercise rest (p<.05), with the largest reductions being observed at the 60th min of recovery and at the sarne periods of post-exercise recovery of the control session. Study 4) After eight weeks of RT (three times per week), the T2D and ND experimental groups decreased systolic blood pressure (SBP) by 7.0 and 3.4 mmHg, respectively. However, the control groups showed maintenance (0.24 mmHg for T2D) or elevation (2.2 mmHg for ND) of systolic blood pressure. Although none of these changes were significant (p > .05). As regards the absolute values of BP, T2D subjects who did not undergo the training (T2DCON) tended (p = .057) to have increase SBP and significantly (p = .05) increased MAP. Conclusions: studyl) it was concluded that T2D individuals presented lower PKA, BK and NOx release as well as higher desArg9-BK production and reduced PEH in relation to ND participants after a single exercise session. Study 2) A single session of aerobic exercise resulted in 24 h BP reductions in individuals with T2D, especially while sleeping, and this reduction seems to be dependent on the intensity of the exercise performed. Study 3) a single CK session can promote a decrease in BP for at least 60 min after performing this type of exercise in young adults. Study 4) eight weeks of RT does not increase NO concentrations and, in tum, does not reduce BP in T2D patients-though it prevented its increase. / Introdu????o: o diabetes est?? associado com disfun????o endotelial, bem como com diversas desordens cardiovasculares, como hipertens??o arterial sist??mica (HAS). A HAS e o diabetes coexistem muito frequentemente. Aproximadamente, 60-65% dos diab??ticos s??o hipertensos. A coexist??ncia do diabetes e HAS pode reduzir a vasodilata????o endot??lio-dependente, que pode ser parcialmente explicada por uma reduzida produ????o ou resposta ao ??xido n??trico (ON) na nusculatura vascular lisa. Por outro lado, estudos t??m demonstrado que uma ??nica sess??o de exerc??cio pode promover redu????es significativas na press??o arterial (PA). Esta ocorr??ncia ?? conhecida como hipotens??o p??s-exerc??cio (HPE) e parece estar associada com a atividade do sistema calicre??na-cinina e libera????o do ON. Embora estudos tenham observado HPE em indiv??duos com diabetes tipo 2 (DT2), os mecanismos moleculares relacionados ?? sua ocorr??ncia n??o foram completamente elucidados. Adicionalmente, a prescri????o de intensidades de exerc??cio baseada em cargas relativas ao limiar de lactato (LL) t??m sido sugerida para indiv??duos com DT2. No entanto, apesar de estudos anteriores demonstrarem que os indiv??duos com DT2 apresentam HPE quando submetidos a exerc??cios em intensidades em torno LL . Existe evid??ncia que indiv??duos com DT2 apresentam menor atividade da calicre??na plasm??tica (ACP) em compara????o aos indiv??duos n??o diab??ticos, sugerindo uma menor libera????o de ON e redu????o da vasodilata????o endot??lio-dependente em resposta ao exerc??cio para essa popula????o. Contudo, para o nosso melhor conhecimento, ainda n??o foram realizadas investiga????es sobre as respostas integradas de ACP, bradicinina (BK), des-Arg9-bradicinina, ON e sua associa????o com a ocorr??ncia de HPE em indiv??duos com ou sem DT2. Ademais, salvo melhor ju??zo, existe apenas um estudo que tenha investigado os efeitos do exerc??cio f??sico (aer??bio e/ou resistido) sobre a resposta da PA de 24 horas em indiv??duos com DT2. Sem mencionar que tamb??m n??o ?? do nosso conhecimento, estudos que tenham investigado os efeitos de diferentes intensidades de exerc??cio aer??bio sobre a PA de 24 horas em indiv??duos com DT2. Somando a isso, diversos estudos t??m investigado os efeitos de diferentes modos de exerc??cio (aer??bio vs. resistido), intensidades, e dura????es, sobre as respostas da P A p??s-exerc??cio. Estudos sobre os efeitos de diferentes modalidades esportivas, especialmente artes marciais, tamb??m foram realizados, tais como: Tai Chi Chuan, Jiu Jitsu e Jud??. Contudo, at?? o presente momento, nenhum estudo investigou a resposta da P A ap??s uma ??nica sess??o de Carat?? de contato (CC). Vale ressaltar que a literatura cient??fica relacionada a esportes de combate t??m sido pouco explorada, especialmente em rela????o ??s vari??veis relacionadas com a sa??de ( ou seja, a redu????o da PA p??s-exerc??cio). A maioria dos estudos investigaram os par??metros relacionados com o desempenho em atletas, tornando a avalia????o de vari??veis relacionadas com a sa??de, uma evidente lacuna cient??fica. Portanto, investiga????es relacionadas a este assunto t??m sido fortemente encorajada. Cabe salientar que, dado as conhecidas complica????es do DT2 e as caracter??sticas da modalidade em quest??o ( elevado contato f??sico de alto impacto), torna-se prudente inicialmente investigar os efeitos de uma sess??o de CC sobre a resposta da P A p??s-exerc??cio em indiv??duos aparentemente saud??veis e posteriormente, se poss??vel, em popula????es especiais como diab??ticos e hipertensos. No que se refere ao exerc??cio cr??nico, em particular sobre o exerc??cio de for??a, a literatura dispon??vel a respeito dos seus efeitos sobre a resposta do ON e, por sua vez, sobre a PA em indiv??duos com DT2, ainda ?? muito incipiente. Para o melhor do nosso conhecimento, existem apenas dois ensaios cl??nicos randomizados sobre os efeitos do treinamento resistido (TR) sobre a resposta do ON e P A em pacientes com DT2, dos quais apenas um, verificou a resposta do ON juntamente com a P A frente ao TR. Portanto, h?? uma aparente falta de evid??ncias a respeito dos efeitos do TR sobre as respostas do NO e PA em pacientes com DT2. Objetivos: estudo 1) investigar e comparas as respostas de ACP, BK, desArg9-bradicinina, ON e PA ap??s uma ??nica sess??o de exerc??cio aer??bio realizada em intensidade moderada (90% da carga de LL) em indiv??duos com e sem DT2; estudo 2) verificar e comparar os efeitos de uma ??nica sess??o de exerc??cio aer??bio sobre a resposta da PA de 24 horas e verificar os efeitos da intensidade do exerc??cio aer??bio sobre a resposta da PA 24 h em indiv??duos com DT2 e pr??-hipertensos; estudo 3) avaliar os efeitos de uma ??nica sess??o de CC sobre a resposta da PA p??s-exerc??cio em adultos jovens; estudo 4) investigar os efeitos de oito semanas de TR sobre as respostas de ON e P A em pacientes com DT2 e seus pares controles. M??todos: estudo 1) Dez indiv??duos com e DT2 e 10 n??o diab??ticos (ND) foram submetidos a tr??s sess??es: 1) teste incremental m??ximo em bicicleta ergom??trica para determinar o limiar de lactato (LL); 2) 20 min de exerc??cio de carga constante em cicloerg??metro, em 90% L T e; 3) sess??o controle. PA e consumo de oxig??nio foram mensurados em repouso e aos 15, 30 e 45 min p??s-exerc??cio. Amostras de sangue venoso foram coletadas em 15 e 45 minutos do per??odo de recupera????o para posterior an??lise de ACP, BK e desArg9- bradicinina. ON foi analisado aos 15 minutos ap??s o exerc??cio. Estudo 2) Dez indiv??duos com diabetes tipo 2 e pr??-hipertens??o foram submetidos a tr??s sess??es aplicadas em ordem rand??mica: 1) controle ( CON), sem exerc??cio e exerc??cio em intensidades moderadas (MOD) e m??xima (MAX). A frequ??ncia card??aca (FC), P A, as concentra????es de lactato sangu??neo ([Lac ]), consumo de oxig??nio (V02) e taxa de percep????o de esfor??o (TPE) foram coletados em repouso, durante as sess??es experimentais e durante o per??odo de recupera????o de 60 min. Ap??s esse per??odo, a P A de 24 h foi monitorada. Estudo 3) Trinta e dois atletas CC foram submetidos a uma sess??o de CC (50 min) e uma sess??o CON. A PA foi medida durante o repouso, bem como aos 15, 30, 45 e 60 min da recupera????o p??s-exerc??cio. Estudo 4) Foi realizada oito semanas de estudo randomizado controlado em pacientes DT2 e ND). Ap??s a triagem inicial, foram distribu??dos aleatoriamente em quatro grupos: (1) treinados com DT2 (TREINADODT2; n = 9), (2) treinados ND (TREINADOND; = n 1 O), ( 3) controle DT2 (CON DT2; n = 8) e (4) controle ND (CONND; n = 7). NO e BP foram determinadas antes e ap??s a interven????o. Resultados: estudo 1) somente o grupo n??o diab??tico (ND) apresentou HPE para press??o arterial sist??lica e press??o arterial m??dia na sess??o LT 90%. O ON plasm??tico aumentou ~ 24,4% no grupo ND e ~ 13,8% para o DT2 15 min ap??s a sess??o de exerc??cios. Al??m disso, apenas os indiv??duos ND mostraram aumentos de ACP e BK em resposta ao exerc??cio e somente os DT2 mostraram um aumento da produ????o desArg9-bradicinina. estudo 2) Ademais, comparado com a sess??o CON, somente a sess??o de exerc??cio MAX apresentou HPE, que durou at?? 8 h ap??s o exerc??cio e durante o sono. estudo 3) Em rela????o ao CC, a press??o arterial sist??lica (PAS), diast??lica (PAD) e press??o arterial m??dia (MAP) foi significativamente menor no per??odo p??s-exerc??cio em rela????o ao pr??-exerc??cio repouso, bem como em rela????o a sess??o CON, com as maiores redu????es sendo observadas aos 60 min de recupera????o. estudo 4) Ap??s oito semanas de RT, ambos os grupos experimentais (DT2 e ND), apresentaram diminui????o da PAS em 7,0 e 3,4 mmHg, respectivamente. No entanto, os grupos controle (DT2 e ND) demonstrou manuten????o (0,24 mmHg para DT2) ou eleva????o (2,2 mmHg para ND) da PAS. Embora nenhuma das mudan??as foram significativas (p> 0,05). Conclus??es: estudol) concluiu-se que os indiv??duos comDT2 apresentaram menor libera????o ACP, bradicinina e ON, bem como maior produ????o desArg9-bradicinina e reduzida HPE em rela????o aos participantes do grupo ND ap??s uma ??nica sess??o de exerc??cio. Estudo 2) uma ??nica sess??o de exerc??cio aer??bio resultou em redu????o da PA de 24 h em indiv??duos com DT2, especialmente durante o sono, e esta redu????o parece ser dependente da intensidade do exerc??cio realizado. Estudo 3) uma ??nica sess??o CC pode promover uma diminui????o da PA durante pelo menos 60 minutos depois de realizar este tipo de exerc??cio em adultos jovens. Estudo 4) oito semanas de TR n??o aumenta as concentra????es de ON e, por sua vez, n??o reduz a P A em indiv??duos com DT2, por??m parece impedir o seu aumento.

O papel dos profissionais que atuam com Tecnologia da Informação (TI) nas organizações tem passado por diversas transformações e os Gestores de TI que atuavam especificamente em questões táticas e operacionais nas áreas mais técnicas, passaram também a ser envolvidos em decisões estratégicas envolvendo a TI. Assim, durante esta transformação os profissionais de TI deixaram os CPDs e passaram a estar mais presentes e próximos a outros setores da organização, com por exemplo a área de negócio. Em 2006, Lee e Lee, mapearam as competências para os Gestores de TI como sendo Técnica, Negócio e Sistema e no mesmo ano Wu et al. (2006), identificaram a competência estratégica como parte das atividades críticas do Gestor de TI. O CIO (Chief Information Officer) é o nome dado atualmente ao responsável pela tecnologia da informação numa organização e suas competências essenciais foram mapeadas nos estudos de Vreuls (2009) e Vreuls e Joia (2012) como sendo: Visão de negócio, Suporte ao negócio, Capacidade de influenciar a organização, Capacidade técnica, Networking externo, Gestão da operação de TI e Visão inovadora. Assim, a partir da evolução das competências dos Gestores de TI, a pesquisa analisou, através de um estudo de caso, como as competências dos Gestores de TI se aproximam das competências do CIO. Além de tomar por base os estudos de Lee e Lee (2006), Wu et al. (2006) e Vreuls (2009), também foi realizada uma análise comparativa com o modelo clássico de Katz (1974) Com a escolha destes modelos teóricos foi realizado um estudo comparativo entre a evolução dos estudos sobre competências gerenciais em diversos níveis. Os dados primários foram coletados por meio de entrevistas semiestruturadas e observação participante e os dados secundários foram obtidos através de fontes documentais do caso estudado. A análise dos dados foi realizada através da análise de conteúdo. Os resultados deste estudo indicam que as competências dos Gestores de TI se aproximam de três das sete competências do CIO e que apesar de estarem nos níveis táticos ou operacionais tem uma participação na área estratégica, o que implica no desenvolvimento dos Gestores de TI e também podem servir como um guia para atração e retenção de talentos na gestão de TI. / The role of Information Technology (IT) professionals in organizations has undergone many transformations, and IT Managers who have been specifically involved in tactical and operational issues in more technical areas have also become involved in strategic decisions involving IT. Thus, during this transformation IT professionals left the CPDs and became more present and close to other sectors of the organization, for example the business area. In 2006, Lee and Lee mapped the competencies for IT Managers as Technical, Business and System and in the same year Wu et al. (2006) identified the Strategic competence as part of the IT Manager's critical activities. The CIO (Chief Information Officer) is the current name given to the head of information technology in an organization and its core competencies have been mapped in the studies of Vreuls (2009) and Vreuls and Joia (2012) as: Business vision, Business support, Ability to influence the organization, Technical capacity, External networking, IT operation management and Innovative vision. Thus, from the evolution of the competences of the IT Managers, the present study analyzed through a case study how the competences of the IT Managers approach the competencies of the CIO In addition to Lee and Lee (2006), Wu et al. Al (2006) and Vreuls (2009), a comparative analysis was also carried out with the classic Katz model (1974). With the choice of these theoretical models, a comparative study was carried out between the evolution of the studies on managerial competences at several levels. The primary data were collected through semi-structured interviews and participant observation, and the secondary data were obtained through documentary sources of the case studied. Data analysis was performed through content analysis. The results of this study indicate that the competencies of IT Managers approach three of the CIO's seven competencies and that although they are at tactical or operational levels, they have a participation in the strategic area, which implies the development of IT Managers and can also serve as a guide for attracting and retaining talent in IT management.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-06-23T21:52:18Z No. of bitstreams: 1 PedroIvoDeSouzaPinheiro_DISSERT.pdf: 1470768 bytes, checksum: 95e0a6d8271caf71927f8658f369b623 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-06-28T21:55:12Z (GMT) No. of bitstreams: 1 PedroIvoDeSouzaPinheiro_DISSERT.pdf: 1470768 bytes, checksum: 95e0a6d8271caf71927f8658f369b623 (MD5) / Made available in DSpace on 2016-06-28T21:55:12Z (GMT). No. of bitstreams: 1 PedroIvoDeSouzaPinheiro_DISSERT.pdf: 1470768 bytes, checksum: 95e0a6d8271caf71927f8658f369b623 (MD5) Previous issue date: 2015-05-27 / O exerc?cio intervalado de alta intensidade tem sido apontado como op??o para o aumento da pr?tica da atividade f?sica al?m de ser sugerido no manejo terap?utico de diversas condi??es como diabetes mellitus e insufici?ncia card?aca. Contudo, o conhecimento pleno das suas repercuss?es fisiol?gicas e dos par?metros que possam trazer maior seguran?a quanto ? sua prescri??o; em especial os efeitos a curto e m?dio prazo (24 horas ap?s o exerc?cio) sobre a recupera??o do exerc?cio, necessitam ser esclarecidos. O objetivo do presente trabalho ? avaliar a repercuss?o de uma sess?o de exerc?cio aer?bico cont?nuo e intervalado no controle auton?mico card?aco imediato e em m?dio prazo (24 horas), atrav?s da avalia??o da variabilidade da frequ?ncia card?aca (VFC). Trata-se de um ensaio cl?nico randomizado do tipo crossover onde indiv?duos jovens saud?veis e com baixo n?vel de atividade f?sica tiveram a VFC de 24 horas mensurada atrav?s de frequenc?metro e aceler?metro port?til (eMotion HRV 3D, Kuopio, Finl?ndia) antes e ap?s sess?o de exerc?cio aer?bio cont?nuo (60-70% FCmax, 21min.) e intervalado (ciclo 1 min. a 80-90% FCmax, 2 min. a 50-60% FCmax, dura??o 21 min.). A VFC foi avaliada nos dom?nio tempo e frequ?ncia e o balan?o simpatovagal determinado pela raz?o LF/HF. Avalia??o n?o linear foi calculada pela entropia de Shannon. O dados demonstraram retardo na recupera??o imediata da frequ?ncia card?aca p?s exerc?cio e menor FC 24 horas comparados a valores pr? interven??o, principalmente no exerc?cio intervalado. Houve tend?ncia ? maior predom?nio e valores de ?ndices representantes da estimula??o simp?tica durante o dia no grupo de exerc?cio intervalado; contudo, sem signific?ncia estat?stica. O resultados do estudo auxiliam no esclarecimento das repercuss?es do exerc?cio intervalado nas 24 horas que sucedem a interven??o permitindo par?metros para prescri??o e futura avalia??o de grupos de indiv?duos com patologias metab?licas e cardiovasculares. / The high-intensity interval exercise has been described as an option for increasing physical activity and its use also being suggested in the therapeutic management of many conditions such as diabetes mellitus and heart failure. However, the knowledge of its physiological effects and parameters that can assure greater safety for interval exercise prescription; especially its effect on short- and medium-term (24 hours after exercise) exercise recovery, need to be clarified. This study objective was to evaluate the effect of continuous and interval aerobic exercise on the cardiac autonomic control immediate and medium term (24 hours), by assessing heart rate variability (HRV). The present study is a randomized crossover clinical trial in which healthy young individuals with low level of physical activity had the VFC 24 hours measured by a heart rate sensor and portable accelerometer (3D eMotion HRV, Kuopio, Finland) before and after continuous aerobic exercise (60-70% HR max, 21 min.) and interval exercise (cycle 1 min. 80-90% HR max, 2 min. at 50-60% HR max, duration 21 min.). HRV was measured in the time and frequency domain and the sympathovagal balance determined by the ratio LF / HF. Nonlinear evaluation was calculated by Shannon entropy. The data demonstrated delayed heart rate recovery immediate after exercise and lower HR after 24 hours compared to pre intervention values, especially in the interval exercise group. There was a tendency to higher predominance and representatives index values of sympathetic stimulation during the day in interval exercise group; however, without statistical significance. The study results help to clarify the effects of interval exercise on the 24 hours following interval exercise, setting parameters for prescription and for further evaluation of groups with metabolic and cardiovascular diseases.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-09-05T19:28:01Z No. of bitstreams: 1 AletheaCuryRabeloLeitao_DISSERT.pdf: 1726479 bytes, checksum: e7cf8b69b8cb7f29c2b1f25612b92613 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-09-14T00:04:45Z (GMT) No. of bitstreams: 1 AletheaCuryRabeloLeitao_DISSERT.pdf: 1726479 bytes, checksum: e7cf8b69b8cb7f29c2b1f25612b92613 (MD5) / Made available in DSpace on 2017-09-14T00:04:46Z (GMT). No. of bitstreams: 1 AletheaCuryRabeloLeitao_DISSERT.pdf: 1726479 bytes, checksum: e7cf8b69b8cb7f29c2b1f25612b92613 (MD5) Previous issue date: 2017-02-24 / Introdu??o: O m?todo Pilates (MP) consiste em um conjunto de exerc?cios sistematizados, com evid?ncias em efeitos no condicionamento f?sico e na reabilita??o. Objetivo:Analisar a atividade eletromiogr?fica dos m?sculos abdominais (TrA/OI) e do assoalho p?lvico, durante a realiza??o dos exerc?cios Shoulder Bridge,no solo, Shoulder Bridge, Teaser com mola e Teaser sem mola, no aparelho Cadillac?, por meio da eletromiografia de superf?cie, em mulheres climat?ricas praticantes do M?todo Pilates.M?todos:Vinte e oito mulheres climat?ricas com idade 54,14?6,14 anos, 4?2,9 anos de pr?tica de Pilates, frequ?ncia de 2 vezes na semana (85,7%). Todas as volunt?rias submeteram-se a avalia??o funcional dos MAP pela palpa??o manual bidigital e por aparelho eletromiogr?fico com sonda endovaginal. A avalia??o eletromiogr?fica para os m?sculos abdominais foi realizada por eletrodos de superf?cie Al/AgCl. A an?lise estat?stica dos dados foi realizada no programa SPSS (vers?o 20.0). O teste de normalidade utilizado foi o de Shapiro-Wilk, tendo sido adotado p < 0,05. .A an?lise descritiva foi conduzida utilizando distribui??o de medidas (m?dia, desvio padr?o e frequ?ncia relativa). Para an?lise dos dados eletromiogr?ficos, usou-se a correla??o de Spearman. Resultados: Os achados demonstraram n?o haver correla??o significativa (p>0,418) da ativa??o eletromiogr?fica, entre os MAP e MA, nos exerc?cios selecionados. Conclus?o:? necess?rio o desenvolvimento de futuras pesquisas envolvendo estudos do m?todo Pilates e a musculatura do assoalho p?lvico na prescri??o do treinamento f?sico. / Introduction: The Pilates method (PM) consists of a set of systematized exercises, with evidence with effects on physical conditioning and rehabilitation. Objective: Until the moment of the elaboration of this study, no studies were found to analyze the correlation between the activation of the abdominal muscles (AM) and the pelvic floor muscles (PFM) during the execution of the electromyographic activity of PM exercises in climacteric women. For this study we selected the Shoulder Bridge and Teaser exercises with variations. Methods: The study is characterized as analytical, observational and cross-sectional. 28 climacteric women were evaluated (mean age 54.14 ? 6.14 years), with an average of 4 years of Pilates practice, most of them doing it twice a week (85.7%). The sample was for convenience. All the volunteers underwent the functional evaluation of PFM by bidigital palpation. The electromyographic activity was investigated by the Miotool? device. The capture of electromyographic signals for the PFM was performed with endovaginal catheter (Chatanooga?) and, for the abdominal muscles, with Al / AgCl (Meditrace?) surface electrodes. Statistical analysis of the data was performed using the SPSS program (version 20.0). The normality test used was the Shapiro-Wilk test, using mean and standard deviation for quantitative data evaluation. The presentation of categorical data was given by relative frequencies. For the analysis of the electromyographic data, the Spearman correlation was used. Results: The results showed that there was no relation between electromyographic activation, simultaneously, between PFM and AM, in the selected exercises. Conclusion: Sampling size and absence of a control group may have influenced the findings. It is suggested that future researches involve studies of the Pilates method and pelvic floor musculature in the prescription of physical training. Studies on this subject are scarce and inconclusive.