scholarly journals Long-term Research Challenges in Wind Energy - A Research Agenda by the European Academy of Wind Energy

2016 ◽  
Vol 1 (1) ◽  
pp. 1-39 ◽  
Author(s):  
G. A. M. van Kuik ◽  
J. Peinke ◽  
R. Nijssen ◽  
D. Lekou ◽  
J. Mann ◽  
...  

Abstract. The European Academy of Wind Energy (eawe), representing universities and institutes with a significant wind energy programme in 14 countries, has discussed the long-term research challenges in wind energy. In contrast to research agendas addressing short- to medium-term research activities, this eawe document takes a longer-term perspective, addressing the scientific knowledge base that is required to develop wind energy beyond the applications of today and tomorrow. In other words, this long-term research agenda is driven by problems and curiosity, addressing basic research and fundamental knowledge in 11 research areas, ranging from physics and design to environmental and societal aspects. Because of the very nature of this initiative, this document does not intend to be permanent or complete. It shows the vision of the experts of the eawe, but other views may be possible. We sincerely hope that it will spur an even more intensive discussion worldwide within the wind energy community.


2021 ◽  
Vol 63 (3) ◽  
pp. 566-598
Author(s):  
Matthias van Rossum

AbstractThis article argues that we need to move beyond the “Atlantic” and “formal” bias in our understanding of the history of slavery. It explores ways forward toward developing a better understanding of the long-term global transformations of slavery. Firstly, it claims we should revisit the historical and contemporary development of slavery by adopting a wider scope that accounts for the adaptable and persistent character of different forms of slavery. Secondly, it stresses the importance of substantially expanding the body of empirical observations on trajectories of slavery regimes, especially outside the Atlantic, and most notable in the Indian Ocean and Indonesian Archipelago worlds, where different slavery regimes existed and developed in interaction. Thirdly, it proposes an integrated analytical framework that will overcome the current fragmentation of research perspectives and allow for a more comparative analysis of the trajectories of slavery regimes in their highly diverse formal and especially informal manifestations. Fourth, the article shows how an integrated framework will enable a collaborative research agenda that focuses not only on comparisons, but also on connections and interactions. It calls for a closer integration of the histories of informal slavery regimes into the wider body of existing scholarship on slavery and its transformations in the Atlantic and other more intensely studied formal slavery regimes. In this way, we can renew and extend our understandings of slavery's long-term, global transformations.


2018 ◽  
Author(s):  
Sara C. Pryor ◽  
Tristan J. Shepherd ◽  
Rebecca J. Barthelmie

Abstract. Inter-annual variability (IAV) of expected annual energy production (AEP) from proposed wind farms plays a key role in dictating project financing. IAV in pre-construction projected AEP and the difference in 50th and 90th percentile (P50 and P90) AEP derives in part from variability in wind climates. However, the magnitude of IAV in wind speeds at/close to wind turbine hub-heights is poorly constrained and maybe overestimated by the 6 % standard deviation of annual mean wind speeds that is widely applied within the wind energy industry. Thus there is a need for improved understanding of the long-term wind resource and the inter-annual variability therein in order to generate more robust predictions of the financial value of a wind energy project. Long-term simulations of wind speeds near typical wind turbine hub-heights over the eastern USA indicate median gross capacity factors (computed using 10-minute wind speeds close to wind turbine hub-heights and the power curve of the most common wind turbine deployed in the region) that are in good agreement with values derived from operational wind farms. The IAV of annual mean wind speeds at/near to typical wind turbine hub-heights in these simulations is lower than is implied by assuming a standard deviation of 6 %. Indeed, rather than in 9 in 10 years exhibiting AEP within 0.9 and 1.1 times the long-term mean AEP, results presented herein indicate that over 90 % of the area in the eastern USA that currently has operating wind turbines simulated AEP lies within 0.94 and 1.06 of the long-term average. Further, IAV of estimated AEP is not substantially larger than IAV in mean wind speeds. These results indicate it may be appropriate to reduce the IAV applied to pre-construction AEP estimates to account for variability in wind climates, which would decrease the cost of capital for wind farm developments.


Author(s):  
Pradeep Kumar Rangi ◽  
P. S. Aithal

Notwithstanding the financial slowdown and severity of the Coronavirus pandemic during 2020, several retail investors ventures directly to the secondary equities market, setting off gigantic purchasing. A review of SEBI data indicates that over 6 million new dematerialization accounts between April and September 2020 are about 125 percent growth on year on year basis. At the same time, data reported by AMFI shows net outflows from equity funds by retail investors. These data points indicate that retail investors may have opted to invest using direct stock investments instead of relying on the equity mutual fund manager. Equity Investment is a dynamic process requiring and require considering different variables in selecting and, more importantly, avoiding stocks. The cornerstone of wealth creation is to invest in stores at a price considerably smaller than their intrinsic value. The very foundation of creating long-term wealth using equities is deeply embedded. One is buying businesses at a price substantially below its intrinsic value (intrinsic value indicates the entity's future cash flows after estimating the number of accounting risk, macro-economic, managerial, and behavioral risk determinants). This Literature review, therefore, is organized to cover Behavioral, Accounting, Macro-economic, Volatility, and Management theories and Forecasting and ML techniques for clustering, predictions, and classification to support risk decisions using different models, e.g., ARIMA, LSTM, VAR, Facebook Prophet, ARCH and GARCH family models, etc. The literature review also establishes that the concept of risk is highly subjective and is perceived by different investors differently; it is not always entirely objective and outside the beliefs, cognitive and socio-cultural considerations requiring careful assessment before making investment decisions. However, examining the critical risk indicators would allow investors to make a more informed decision. The research gap and identified agenda for further review were defined and assessed using valuable ABCD and SWOT management frameworks. Consequently, the literature investigation findings are analyzed by offering recommendations for creating a comprehensive research agenda pertinent to long-term equity investors in the Indian Equity market.


2021 ◽  
Vol 1 ◽  
pp. 80
Author(s):  
Thijs Devriendt ◽  
Clemens Ammann ◽  
Folkert W. Asselbergs ◽  
Alexander Bernier ◽  
Rodrigo Costas ◽  
...  

Various data sharing platforms are being developed to enhance the sharing of cohort data by addressing the fragmented state of data storage and access systems. However, policy challenges in several domains remain unresolved. The euCanSHare workshop was organized to identify and discuss these challenges and to set the future research agenda. Concerns over the multiplicity and long-term sustainability of platforms, lack of resources, access of commercial parties to medical data, credit and recognition mechanisms in academia and the organization of data access committees are outlined. Within these areas, solutions need to be devised to ensure an optimal functioning of platforms.


Author(s):  
Ralf Klischewski ◽  
Lemma Lessa

The long-term success of e-government initiatives is of paramount importance, especially for developing countries, which face challenges such as limited budget, donor dependence, transfer of technology, short-term involvement of non-local agents, and relatively unstable political and economic environment. Although e-government success and sustainability are both relevant concepts to assess IT-enabled administrative processes in practice, e-government research has not yet elaborated the two concepts in an integrated fashion. Depending on review of the extant literature, this chapter (1) clarifies the concepts of e-government success and sustainability, (2) provides a conceptualization, which unfolds for both concepts the most used sub-concepts and constructs in terms of enablers and evaluation criteria, and (3) proposes an integrated research agenda for studying the interrelation of both concepts in detail.


2019 ◽  
Vol 29 (7) ◽  
pp. 1056-1064 ◽  
Author(s):  
Jennifer R. Banas ◽  
Susan Magasi ◽  
Kim The ◽  
David E. Victorson

There are 56.7 million people with disabilities (PWD) living in the United States; yet, PWD are significantly underrepresented in health research. Even when researchers purposively seek to include PWD in studies, challenges emerge related to recruitment and retention, leading to inadequate representation and surface understandings of this population. This in turn contributes to the perpetuation of implicit and explicit health disparities that are already experienced by this population. Grounded within a qualitative, community-based participatory health research framework, we highlight challenges associated with recruiting and retaining PWD in health research, including a critical analysis of the research enterprise structure, how this disables accessible research practices for PWD, and leads to continued skepticism among PWD regarding the value of participating in research. Finally, we propose solutions to create and maintain a culture of access and inclusion as well as long-term collaborative and equity-focused partnerships.


2018 ◽  
Vol 25 (1) ◽  
pp. 120 ◽  
Author(s):  
Alexander Dunlap

Providing a glimpse into the reality of wind energy development, the story of Álvaro Obregón is one of resistance. Álvaro Obregón is a primarily Zapotec semi-subsistence community located near the entrance of the Santa Teresa sand bar (Barra), where in 2011 Mareña Renovables initiated the process of building 102 wind turbines. Demonstrating the complicated micro-politics of land acquisition, conflict and unrest, this article argues that climate change mitigation initiatives are sparking land grabs and conflict with the renewed valuation of wind resources. Insurrection against the Mareña Renovables wind project has spawned a long-term conflict, which has created social divisions and a type of low-intensity civil war within the town. This article will chronicle the uprising against the wind company, battles with police, and the town hall takeover, which includes analyzing the conflict taking place between the cabildo comunitario and the constitucionalistas. Subsequent sections examine the different perspectives within the village and how this battle between the Communitarians and the wind company continues today. The article reveals the complications associated with land deals, the conflict generating potential of climate change mitigation practices and, finally, concludes by reflecting on the difficulties of formulating alternatives to development within a conflict situation.


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