975 resultados para new cycle
Resumo:
Photosynthetic and metabolic acclimation to low growth temperatures were studied in Arabidopsis (Heynh.). Plants were grown at 23°C and then shifted to 5°C. We compared the leaves shifted to 5°C for 10 d and the new leaves developed at 5°C with the control leaves on plants that had been left at 23°C. Leaf development at 5°C resulted in the recovery of photosynthesis to rates comparable with those achieved by control leaves at 23°C. There was a shift in the partitioning of carbon from starch and toward sucrose (Suc) in leaves that developed at 5°C. The recovery of photosynthetic capacity and the redirection of carbon to Suc in these leaves were associated with coordinated increases in the activity of several Calvin-cycle enzymes, even larger increases in the activity of key enzymes for Suc biosynthesis, and an increase in the phosphate available for metabolism. Development of leaves at 5°C also led to an increase in cytoplasmic volume and a decrease in vacuolar volume, which may provide an important mechanism for increasing the enzymes and metabolites in cold-acclimated leaves. Understanding the mechanisms underlying such structural changes during leaf development in the cold could result in novel approaches to increasing plant yield.
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The study of the Upper Jurassic-Lower Cretaceous deposits (Higueruelas, Villar del Arzobispo and Aldea de Cortés Formations) of the South Iberian Basin (NW Valencia, Spain) reveals new stratigraphic and sedimentological data, which have significant implications on the stratigraphic framework, depositional environments and age of these units. Moreover, these new data encourage revising the previously proposed stratigraphic correlations between the studied units and those deposited in adjacent areas of the Iberian Basin. The Higueruelas Fm was deposited in a mid-inner carbonate platform where oncolitic bars migrated by the action of storms and where oncoid production progressively decreased towards the uppermost part of the unit. The overlying Villar del Arzobispo Fm has been traditionally interpreted as an inner platform-lagoon evolving into a tidal-flat. Here it is interpreted as an inner-carbonate platform affected by storms, where oolitic shoals protected a lagoon, which had siliciclastic inputs from the continent. The Aldea de Cortés Fm has been previously interpreted as a lagoon surrounded by tidal-flats and fluvial-deltaic plains. Here it is reinterpreted as a coastal wetland where siliciclastic muddy deposits interacted with shallow fresh to marine water bodies, aeolian dunes and continental siliciclastic inputs. The contact between the Higueruelas and Villar del Arzobispo Fms, classically defined as gradual, is interpreted here as gradual and rapid, because the transition between both units comprises few meters. More importantly, the contact between the Villar del Arzobispo and Aldea de Cortés Fms, previously considered as unconformable, is here interpreted as gradual. The presence of Alveosepta in the Villar del Arzobispo Fm suggests that at least part of this unit is Kimmeridgian, unlike the previously assigned Late Tithonian-Middle Berriasian age. Consequently, the underlying Higueruelas Fm, previously considered Tithonian, should not be younger than Kimmeridgian. Accordingly, sedimentation of the Aldea de Cortés Fm, previously considered Valanginian-Hauterivian, probably started during the Tithonian and it may be considered part of the regressive trend of the Late Jurassic-Early Cretaceous cycle. This is consistent with the dinosaur faunas, typically Jurassic, described in the Villar del Arzobispo and Aldea de Cortés Fms.
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Raising boys in accordance with traditional masculinity ideologies is creating a mental health crisis among men. Socialization in accordance with traditional male gender roles causes boys to develop dismissing-avoidant attachments with their primary caregivers. Approaching subsequent relationships with a dismissing-attachment style creates disconnection between men and male peers, female partners, and their children. Many researchers advocate clinical interventions that perpetuate men's traditional fears of intimacy, however attachment theory provides an alternative lens through which clinicians may approach therapy with men. By engaging men in therapeutic attachment relationships, clinicians can inspire implicit and explicit learning of new attachment patterns. This experience by nature challenges traditional definitions of masculinity, and men may develop more congruent, adaptive, and healthy definitions of masculinity.
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Although deterministic models of the evolution of mass tourism coastal resorts predict an almost inevitable decline over time, theoretical frameworks of the evolution and restructuring policies of mature destinations should be revised to reflect the complex and dynamic way in which these destinations evolve and interact with the tourism market and global socio-economic environment. The present study examines Benidorm because its urban and tourism model and large-scale tourism supply and demand make it one of the most unique destinations on the Mediterranean coast. The investigation reveals the need to adopt theories and models that are not purely deterministic. The dialectic interplay between external factors and the internal factors inherent in this destination simultaneously reveals a complex and diverse stage of maturity and the ability of destinations to create their own future.
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Even though it has been proved that a fully thermally coupled distillation (TCD) system minimizes the energy used by a sequence of columns, it is well-known that vapor/liquid transfers between different sections produce an unavoidable excess of vapor (liquid) in some of them, increasing both the investment and operating costs. It is proposed here to take advantage of this situation by extracting the extra vapor/liquid and subjecting it to a direct/reverse vapor compression cycle. This new arrangement restores the optimal operating conditions of some of the affected sections with energy savings of around 20–30% compared with conventional TCD columns. Various examples, including the direct and reverse vapor recompression cycles, are presented. Furthermore, in each example, all possible modes of distillation (direct, indirect and Petlyuk distillation) with and without vapor recompression cycles (VRC) are compared to ensure that this approach delivers the best results.
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The susceptibility of clay bearing rocks to weathering (erosion and/or differential degradation) is known to influence the stability of heterogeneous slopes. However, not all of these rocks show the same behaviour, as there are considerable differences in the speed and type of weathering observed. As such, it is very important to establish relationships between behaviour quantified in a laboratory environment with that observed in the field. The slake durability test is the laboratory test most commonly used to evaluate the relationship between slaking behaviour and rock durability. However, it has a number of disadvantages; it does not account for changes in shape and size in fragments retained in the 2 mm sieve, nor does its most commonly used index (Id2) accurately reflect weathering behaviour observed in the field. The main aim of this paper is to propose a simple methodology for characterizing the weathering behaviour of carbonate lithologies that outcrop in heterogeneous rock masses (such as Flysch slopes), for use by practitioners. To this end, the Potential Degradation Index (PDI) is proposed. This is calculated using the fragment size distribution curves taken from material retained in the drum after each cycle of the slake durability test. The number of slaking cycles has also been increased to five. Through laboratory testing of 117 samples of carbonate rocks, extracted from strata in selected slopes, 6 different rock types were established based on their slaking behaviour, and corresponding to the different weathering behaviours observed in the field.
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The electric vehicle (EV) market has seen a rapid growth in the recent past. With an increase in the number of electric vehicles on road, there is an increase in the number of high capacity battery banks interfacing the grid. The battery bank of an EV, besides being the fuel tank, is also a huge energy storage unit. Presently, it is used only when the vehicle is being driven and remains idle for rest of the time, rendering it underutilized. Whereas on the other hand, there is a need of large energy storage units in the grid to filter out the fluctuations of supply and demand during a day. EVs can help bridge this gap. The EV battery bank can be used to store the excess energy from the grid to vehicle (G2V) or supply stored energy from the vehicle to grid (V2G ), when required. To let power flow happen, in both directions, a bidirectional AC-DC converter is required. This thesis concentrates on the bidirectional AC-DC converters which have a control on power flow in all four quadrants for the application of EV battery interfacing with the grid. This thesis presents a bidirectional interleaved full bridge converter topology. This helps in increasing the power processing and current handling capability of the converter which makes it suitable for the purpose of EVs. Further, the benefit of using the interleaved topology is that it increases the power density of the converter. This ensures optimization of space usage with the same power handling capacity. The proposed interleaved converter consists of two full bridges. The corresponding gate pulses of each switch, in one cell, are phase shifted by 180 degrees from those of the other cell. The proposed converter control is based on the one-cycle controller. To meet the challenge of new requirements of reactive power handling capabilities for grid connected converters, posed by the utilities, the controller is modified to make it suitable to process the reactive power. A fictitious current derived from the grid voltage is introduced in the controller, which controls the converter performance. The current references are generated using the second order generalized integrators (SOGI) and phase locked loop (PLL). A digital implementation of the proposed control ii scheme is developed and implemented using DSP hardware. The simulated and experimental results, based on the converter topology and control technique discussed here, are presented to show the performance of the proposed theory.
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The purpose of this dissertation is to give a contribution to the translation of the terminology of Cycle and Bike Polo into European Portuguese and hence call the attention of a wide Portuguese public to this fairly new sport, whose roots go back to Elephant and Horse Polo in India and in other parts of the world. Sequencing a characterization of technical translation, translation issues of Bike and Cycle Polo´s terminological units have been dealt with in the light of the Cognitive Linguistics framework and hence intimately associated both with physical experiences and historical facts. In fact, sports terminology coinage in this field is highly motivated by metaphorical and metonymical conceptualization mapped from physical reality dimensions, as well as from already existing sports terminology from other sports modalities. In order to render this research unique, a glossary of technical terms from Bike and Cycle Polo has been gathered, since most of them had not yet undergone translation from English into European Portuguese. For validation of my translations I have resorted to Portuguese bike polo players, with special reference to Catarina Almeida, who introduced me to Bike Polo’s terminology.
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The market for investment products, including both securities and investment funds, is fraught with difficulties for consumers in terms of the ease of comparing products, trust in suppliers and consumer satisfaction. A comprehensive approach to investor protection, developed around the lifecycle of a financial product, may offer the investor greater protection during an investment’s life span. This paper proposes a new approach to investor protection, building on a review of major market failures affecting the origination, distribution and sale of financial products and based on a review of the relevant scientific literature and country experiences. The application of a ‘know-your-product’ principle at origination, a narrower ‘default rule’ for best execution and an ex-ante distinction between advice and ‘information-only’ services are among the options discussed in this paper to enhance the investor protection framework over the lifecycle of a financial product.
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THIS DOCUMENT CONTAINS A COLLECTION OF ARTICLES WHICH ARE AVAILABLE ON THE ARCHIVE AS SEPARATE ARTICLES. There has been a lot of attention on the current transition of power taking place in Brussels. The new EU leadership will be confronted with a number of internal and external challenges. They will have deal with economic stagnation, the negative effects of fragmentation and the need to increase the Union's legitimacy. There is no better moment to take stock of the ‘state of the Union’ and to look ahead into the next European political cycle (2014-2019), focusing not on personalities but on content: what challenges do we face and what should the EU focus on in the coming years? These new beginnings will encounter new challenges, and who better understands the issues than some of the key players in European politics. Challenge Europe brings these players together and explores what social, political and economic challenges are facing Europe, and its’ citizens.
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The euro area crisis exposed substantial structural flaws in the currency area’s architecture. Addressing these flaws this discussion paper explores the ways in which the European Institutions can re-evaluate and overcome challenges for a more positive European future. To do this, Janis A. Emmanouilidis, Jan David Schneider, and Fabian Zuleeg recommend that the coming European Commission should develop a new framework to assess the real returns to growth of public and social investment, which could open the path for more flexibility on deficits in future. In close coordination with the European Parliament, the Commission should also review the Country Specific Recommendations with a stronger focus on a smaller number of key priorities for each country. The construction of a fiscal capacity should be made a priority in the new political cycle to resolve the absence of a mechanism to provide effective ex ante fiscal risk sharing in the Eurozone. Furthermore, to boost growth, there is a need to encourage private, public and social investment through a European Investment Programme (EIP) in the short term. Finally, the Commission should ensure that the implementation of an EIP is compatible with the long term goals of a fiscal capacity.
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During the last political cycle (2009-2014), the European Union (EU) went through the worst crisis of its history. In the months and years to come, the new EU leadership and Member States will have to take major decisions if Europeans want to sustainably overcome the crisis, prepare themselves for the manifold internal and external tests ahead, and provide the grounds for Europe to exploit more of its potential and meet the needs and expectations of citizens. The outcome of this venture is unclear considering the 'state of the Union' and the current mood in Brussels and national capitals. But one thing seems rather certain: to generate active support from citizens and elites, future developments at European and national level need to be driven by confidence and renewed ambition and not, as in the past years, by fear first – fear of a euro implosion; or of an involuntary exit from the common currency with unforeseeable consequences. In order to take strategic decisions about the Union's future, there is a need to identify and address the key challenge(s) and provide a coherent and holistic response on the grounds of an ambitious but at the same time pragmatic 'package deal', taking into account the diverging interests of Member States and their citizens. But what is the state of affairs, what is the key strategic challenge and how can the new EU leadership cope with it in the next political cycle (2014-2019)?
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In the last five years deep cracks have appeared in the European project. The 'euro-area crisis' triggered by a severe global financial and economic crisis has put European integration to a major test, more profound than ever before. The experience of recent years has revealed and exacerbated significant deficiencies in the European Union's (EU) economic and political construction. At time it has cast doubt on fundamentals of the European project and raised questions about whether Europe will be able to deal effectively not only with the immediate crisis, but also with the many other serious socio-economic, politico-institutional, societal and global challenges that Europe is and will be confronted with. At the start of a new institutional-political cycle (2014-2019) and while the crisis situation has for a number of reasons improved significantly since the summer of 2012, at least in systemic terms, the Union's new leadership and Member States will now have to take strategic decisions about the future of European integration.
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The crisis in the eurozone– which became worse in Europe at the same time that the Lisbon Treaty entered in force at the end of 2009 – has presented the first test of the crisis management capabilities of the intergovernmental approach. As provided under the Lisbon Treaty, the European Council has been the true decision-making centre for the policies adopted in response to the financial crisis, with the Commission playing a technical role. This commentary finds, however, that this institutional set-up has been unsatisfactory and unable to overcome the three fundamental dilemmas of the integration process: the dilemma of veto power, the dilemma of enforcement of the agreements and the dilemma of decision-making legitimacy. While it remains to be seen whether the election of François Hollande as President of France signals the beginning of a new political cycle characterised by new ideas on the institutional future of the EU, if that were to materialise, this paper aims to contribute to the debate on those new ideas.
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On 19 May 2015, the European Commission published a very comprehensive, ambitious and innovative Better Regulation package, which contains new guidelines on various phases of the policy cycle and various documents setting out the rules and functioning of entirely new consultation platforms and a new body in charge of regulatory scrutiny. This Special Report presents some initial impressions on the content of this remarkable set of new documents, which will shape the way in which EU policies will be prepared, shaped, monitored and evaluated in the years to come.