Multidisciplinary Design Optimization of Extra-Large Wind Turbine Monopile in Hurricane Conditions

2021 ◽  
Author(s):  
Matteo Bucchini ◽  
Zhiyong Yang ◽  
Roger Basu ◽  
Aimin Wang ◽  
Won Ho Lee ◽  
...  
Keyword(s):  
Wind Turbines ◽  
East Coast ◽  
Research Work ◽  
The United States ◽  
Optimization Techniques ◽  
Offshore Wind ◽  
The Us ◽  
Large Wind ◽  
Modern Optimization

Offshore wind energy is developing rapidly in the United States, particularly off the East coast, which has an extensive continental shelf and where the water depths are such that wind turbines founded directly on the seabed are the most attractive. Of the various foundation configurations that are feasible, it is the monopile that is expected to be most widely used. Another feature of the US East coast is that it is hurricane-prone region, which poses some unique challenges to designers. This paper summarizes research work undertaken to investigate how the role of modern optimization techniques can contribute to the design of such installation and does not establish any realistic project related implications. The project addresses the design of a 15 MW turbine, which represents the upper limit capacity of currently available wind turbines.

scholarly journals Experimental Verification of ABS Concrete Design Methodology Applied to the Design of the First Commercial Scale Floating Offshore Wind Turbine in the United States

2017 ◽  
Author(s):  
Mark G. Dwyer ◽  
Anthony M. Viselli ◽  
Habib J. Dagher ◽  
Andrew J. Goupee
Keyword(s):  
United States ◽  
Wind Turbine ◽  
Wind Turbines ◽  
Experimental Verification ◽  
Design Methodology ◽  
The United States ◽  
Offshore Wind ◽  
Offshore Wind Turbine ◽  
Commercial Scale ◽  
The Us

The abundance of consistent high strength winds off the world’s coastlines and the close proximity to dense population centers has led to development of innovative marine structures to support wind turbines to capture this energy resource. Off the US coast, 60% of the offshore wind lies in deep water (greater than 60m) where the development of Floating Offshore Wind Turbine (FOWT) hull technology will likely be required in lieu of fixed bottom technology such as jacket structures. The United States National Renewable Energy Laboratory (NREL) and the offshore wind community commonly refer to 60m as the transition point between fixed bottom structures and floating structures due to economic reasons. Floating wind turbines deployed in the harsh offshore marine environment require the use of materials that are cost-effective, corrosion resistant, require little maintenance and are highly durable. This has led the University of Maine to develop a concrete hull technology called VolturnUS for full-scale 6MW FOWTs. In this work, experimental testing was conducted to verify the performance of the concrete under operational, serviceability, and extreme loading conditions as required by the American Bureau of Shipping Guide for Building and Classing Floating Offshore Wind Turbines. The testing included structural testing sub-components of the hull and served as experimental verification of American Bureau of Shipping (ABS) concrete design methodology which is currently approved and being used to design the first commercial scale FOWTs in the United States. Two 6MW wind turbines supported on VolturnUS concrete hulls will be used for the New England Aqua Ventus I project. The project is planned to be deployed and connected to the grid by 2019 in the Northeast U.S. and is funded by the US Department of Energy.

Public perceptions of who counts as a scientist for controversial science

2019 ◽  
Vol 28 (7) ◽  
pp. 797-811 ◽  
Author(s):  
Brianne Suldovsky ◽  
Asheley Landrum ◽  
Natalie Jomini Stroud
Keyword(s):  
Climate Change ◽  
Media Coverage ◽  
Political Ideology ◽  
Genetically Modified Organisms ◽  
The United States ◽  
Public Perceptions ◽  
The Public ◽  
The Us ◽  
Science Media

In an era where expertise is increasingly critiqued, this study draws from the research on expertise and scientist stereotyping to explore who the public considers to be a scientist in the context of media coverage about climate change and genetically modified organisms. Using survey data from the United States, we find that political ideology and science knowledge affect who the US public believes is a scientist in these domains. Our results suggest important differences in the role of science media attention and science media selection in the publics “scientist” labeling. In addition, we replicate previous work and find that compared to other people who work in science, those with PhDs in Biology and Chemistry are most commonly seen as scientists.

scholarly journals Ukraine in the Focus of US Foreign Policy Priorities

2020 ◽  
pp. 66-79
Author(s):  
N. Gegelashvili ◽  
◽  
I. Modnikova ◽  
Keyword(s):  
United States ◽  
Soviet Union ◽  
The United States ◽  
Donald Trump ◽  
The Soviet Union ◽  
The Us ◽  
The World ◽  
The Russian Federation ◽  
Radical Transformation

The article analyzes the US policy towards Ukraine dating back from the time before the reunification of Crimea with Russia and up to Donald Trump coming to power. The spectrum of Washington’s interests towards this country being of particular strategic interest to the United States are disclosed. It should be noted that since the disintegration of the Soviet Union Washington’s interest in this country on the whole has not been very much different from its stand on all post-Soviet states whose significance was defined by the U,S depending on their location on the world map as well as on the value of their natural resources. However, after the reunification of Crimea with Russia Washington’s stand on this country underwent significant changes, causing a radical transformation of the U,S attitude in their Ukrainian policy. During the presidency of Barack Obama the American policy towards Ukraine was carried out rather sluggishly being basically declarative in its nature. When President D. Trump took his office Washington’s policy towards Ukraine became increasingly more offensive and was characterized by a rather proactive stance not only because Ukraine became the principal arena of confrontation between the United States and the Russian Federation, but also because it became a part of the US domestic political context. Therefore, an outcome of the “battle” for Ukraine is currently very important for the United States in order to prove to the world its role of the main helmsman in the context of a diminishing US capability of maintaining their global superiority.

scholarly journals "But I Didn't Mean To": The Role of Intent in American and Canadian Anti-Preference Law

2013 ◽  
Vol 50 (4) ◽  
pp. 815
Author(s):  
Clayton Bangsund
Keyword(s):  
United States ◽  
The United States ◽  
Policy Objective ◽  
The Us ◽  
The Way

In both the United States and Canada, bankruptcy preferential transfer avoidance provisions are aimed at creating equality of distribution among similarly situated creditors. However, there is a key difference in the way each jurisdiction’s regime treats the notion of intent. An analysis of each regime, using examples, illustrates the way in which Canada’s regime effectually does violence to the distributive equality policy objective, while the US regime adheres to it.

Seismic Design for Offshore Wind Farms – Lessons Learnt From the ACE Joint Industry Project

2021 ◽  
Author(s):  
Marcus Klose ◽  
Junkan Wang ◽  
Albert Ku
Keyword(s):  
Seismic Design ◽  
Wind Turbines ◽  
Wind Farms ◽  
The United States ◽  
Offshore Wind ◽  
Seismic Load ◽  
Support Structures ◽  
Offshore Wind Farms ◽  
Asian Pacific Region ◽  
The Impact

Abstract In the past, most of the offshore wind farms have been installed in European countries. In contrast to offshore wind projects in European waters, it became clear that the impact from earthquakes is expected to be one of the major design drivers for the wind turbines and their support structures in other areas of the world. This topic is of high importance in offshore markets in the Asian Pacific region like China, Taiwan, Japan, Korea as well as parts of the United States. So far, seismic design for wind turbines is not described in large details in existing wind energy standards while local as well as international offshore oil & gas standards do not consider the specifics of modern wind turbines. In 2019, DNV GL started a Joint Industry Project (JIP) called “ACE -Alleviating Cyclone and Earthquake challenges for wind farms”. Based on the project results, a Recommended Practice (RP) for seismic design of wind turbines and their support structures will be developed. It will supplement existing standards like DNVGL-ST-0126, DNVGL-ST-0437 and the IEC 61400 series. This paper addresses the area of seismic load calculation and the details of combining earthquake impact with other environmental loads. Different options of analysis, particularly time-domain simulations with integrated models or submodelling techniques using superelements will be presented. Seismic ground motions using a uniform profile or depth-varying input profile are discussed. Finally, the seismic load design return period is addressed.

The Carter administration and the "communist question" in Italy. The political development and action, 1976-1978

2021 ◽  
pp. 101-126
Author(s):  
Alice Ciulla
Keyword(s):  
United States ◽  
Political Development ◽  
The United States ◽  
Carter Administration ◽  
Jimmy Carter ◽  
Electoral Campaign ◽  
The Us ◽  
Liberal Culture ◽  
Ambiguous Position

Jimmy Carter was elected President of the United States in November 1976. A few months earlier, the Italian elections marked an extraordinary result for the Italian Communist Party (PCI), and some of its members obtained institutional roles. During the electoral campaign, members of Carter's entourage released declarations that seemed to prelude to abandoning the anti-communist veto posed by previous governments. For a year after the inauguration, the US administration maintained an ambiguous position. Nonetheless, on 12 January 1978, the United States reiterated its opposition to any forms of participation of communists in the Italian government. Drawing on a varied set of sources and analysing the role of non-state actors, including think tanks and university centres, this article examines the debate on the Italian "communist question" within the Carter administration and among its advisers. Such discussion will be placed within a wider debate that crossed America's liberal culture.

Development of the Medical Interpreting Profession in the US

2020 ◽  
pp. 1-25
Author(s):  
Holly M. Mikkelson
Keyword(s):  
United States ◽  
Labor Market ◽  
The United States ◽  
Role Of Government ◽  
The Us ◽  
Medical Interpreters ◽  
Medical Interpreting ◽  
Further Development

This chapter traces the development of the medical interpreting profession in the United States as a case study. It begins with the conception of interpreters as volunteer helpers or dual-role medical professionals who happened to have some knowledge of languages other than English. Then it examines the emergence of training programs for medical interpreters, incipient efforts to impose standards by means of certification tests, the role of government in providing language access in health care, and the beginning of a labor market for paid medical interpreters. The chapter concludes with a description of the current situation of professional medical interpreting in the United States, in terms of training, certification and the labor market, and makes recommendations for further development.

The Origins of Neoliberalism and the Role of the German State

2021 ◽  
pp. 16-33
Author(s):  
Julian Germann
Keyword(s):  
International Political Economy ◽  
The United States ◽  
German State ◽  
The Us ◽  
Global Movement ◽  
Anglo American ◽  
The Uk ◽  
Corporate Profits ◽  
German Contribution

This chapter reviews the most prominent explanations of the global rise of neoliberalism provided within critical International Political Economy: (1) a state-centered argument, which holds that neoliberalism was imposed by the United States in a bid to reassert its global dominance; (2) a class-based argument, which sees neoliberalism as the project of globalizing elites who sought to restore their corporate profits and power; and (3) an ideational argument, which describes the rise of neoliberalism as a paradigmatic shift in economic ideas. The chapter argues that these accounts share a common bias: they pivot unduly on the Anglo-American world and are unable to capture the peculiar German contribution to the origins of neoliberalism. As a result, they misread the rise of Germany to the apex of a neoliberal Europe as a belated repetition of the same global movement spearheaded by the US and the UK.

The Violence of Inequality: Race and Lobbying in the Politics of Crime and Criminal Justice in the United States

2021 ◽  
pp. 68-93
Author(s):  
Sappho Xenakis ◽  
Leonidas K. Cheliotis
Keyword(s):  
United States ◽  
Criminal Justice ◽  
Policy Making ◽  
Political Process ◽  
The United States ◽  
Reciprocal Relationship ◽  
Criminal Justice Policy ◽  
The Political ◽  
The Us

There is no shortage of scholarly and other research on the reciprocal relationship that inequality bears to crime, victimisation and contact with the criminal justice system, both in the specific United States context and beyond. Often, however, inequality has been studied in conjunction with only one of the three phenomena at issue, despite the intersections that arguably obtain between them–and, indeed, between their respective connections with inequality itself. There are, moreover, forms of inequality that have received far less attention in pertinent research than their prevalence and broader significance would appear to merit. The purpose of this chapter is dual: first, to identify ways in which inequality’s linkages to crime, victimisation and criminal justice may relate to one another; and second, to highlight the need for a greater focus than has been placed heretofore on the role of institutionalised inequality of access to the political process, particularly as this works to bias criminal justice policy-making towards the preferences of financially motivated state lobbying groups at the expense of disadvantaged racial minorities. In so doing, the chapter singles out for analysis the US case and, more specifically, engages with key extant explanations of the staggering rise in the use of imprisonment in the country since the 1970s.

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