The Cold Reality of Power

2001 ◽  
Vol 123 (06) ◽  
pp. 54-57 ◽  
Author(s):  
John R. Hull ◽  
Patrick E. Phelan
Keyword(s):  
Electric Power ◽  
Large Scale ◽  
High Temperature Superconductors ◽  
The United States ◽  
Department Of Energy ◽  
First Year ◽  
Manufacturing Plants ◽  
The Us ◽  
Total Lack ◽  
Power Application

This article highlights large-scale applications of high-temperature superconductors (HTS), based on copper-oxide ceramics, which have begun to occur in the United States. A number of major electric-power application projects have been undertaken as partnerships between the US Department of Energy and various companies. Superconductors are particularly appropriate for electric power applications because of the total lack of resistance in direct current applications and very low losses in alternating current. The low losses allow use of much higher current densities than can be achieved in normal conducting metals, such as copper or aluminum. An HTS transmission line has been operating at the Southwire Co. in Carrollton, GA, since January 5, 2000. Since then, the three 100-foot-long above-ground cables have supplied 1250 A at 12.4 kV to three manufacturing plants at the Southwire headquarters. During its first year of operation, the line supplied more than 5000 hours of operation at 100% load. Southwire’s HTS cables lose only about 0.5% of power during transmission, compared to 5 to 8 percent lost by traditional cables.

scholarly journals Solar Thermochemical Hydrogen Production in the USA

2021 ◽  
Vol 13 (14) ◽  
pp. 7804
Author(s):  
Christoph Falter ◽  
Andreas Sizmann
Keyword(s):  
Hydrogen Production ◽  
Large Scale ◽  
Low Cost ◽  
The United States ◽  
Solar Irradiation ◽  
Transport Sector ◽  
Fossil Energy ◽  
The Us ◽  
The Usa ◽  
Solar Thermochemical

Hydrogen produced from renewable energy has the potential to decarbonize parts of the transport sector and many other industries. For a sustainable replacement of fossil energy carriers, both the environmental and economic performance of its production are important. Here, the solar thermochemical hydrogen pathway is characterized with a techno-economic and life-cycle analysis. Assuming a further increase of conversion efficiency and a reduction of investment costs, it is found that hydrogen can be produced in the United States of America at costs of 2.1–3.2 EUR/kg (2.4–3.6 USD/kg) at specific greenhouse gas emissions of 1.4 kg CO2-eq/kg. A geographical potential analysis shows that a maximum of 8.4 × 1011 kg per year can be produced, which corresponds to about twelve times the current global and about 80 times the current US hydrogen production. The best locations are found in the Southwest of the US, which have a high solar irradiation and short distances to the sea, which is beneficial for access to desalinated water. Unlike for petrochemical products, the transport of hydrogen could potentially present an obstacle in terms of cost and emissions under unfavorable circumstances. Given a large-scale deployment, low-cost transport seems, however, feasible.

What's new in the "new" US course towards the DPRK?

2021 ◽  
pp. 16
Author(s):  
Alexander Zhebin
Keyword(s):  
North Korea ◽  
Large Scale ◽  
The United States ◽  
Negotiation Process ◽  
Republic Of Korea ◽  
Us Economy ◽  
The Us ◽  
Nuclear Problem ◽  
The Republic ◽  
Taiwan Straits

The article analyzes the prospects for US-North Korean and inter-Korean relations, taking into account the completed policy review of the new US administration towards the Democratic People's Republic of Korea (DPRK), as well as the results of the President of the Republic of Korea Moon Jae-in’s trip to Washington in May 2021 and his talks with US President Joe Biden. It is concluded that the “new" course proposed by the United States in relation to the DPRK will not lead to a solution to the nuclear problem of the Korean Peninsula and will interfere with the normalization of inter-Korean relations. During his visit to the US President Moon failed to obtain the US consent on ROK more “independent policy” toward North Korea. In spite of lavish investments into US economy and other concessions, Seoul was forced to promise to coordinate his approaches to the DPRK with US and Japan and support US position on Taiwan straits and South China Sea. The author argues that in the current conditions, the introduction of a regime of arms limitation and arms control in Korea should be a necessary stage on the way to complete denuclearization of the peninsula. The transition to a such method of the settlement of the nuclear problem could lead to the resumption of the negotiation process, mutual concessions, including reductions in the level of military-political confrontation, partial or large-scale lifting of economic sanctions in exchange for North Korea's restrictions of its nuclear weapon and missile systems.

scholarly journals Sampling density and date influence spatial representation of tree ring reconstructions

2020 ◽  
Author(s):  
Justin T. Maxwell ◽  
Grant L. Harley ◽  
Trevis J. Matheus ◽  
Brandon M. Strange ◽  
Kayla Van Aken ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Spatial Variability ◽  
Tree Ring ◽  
Tree Rings ◽  
Large Scale ◽  
The United States ◽  
Severe Drought ◽  
Ring Network ◽  
Tree Ring Data ◽  
The Us

Abstract. Our understanding of the natural variability of hydroclimate before the instrumental period (ca. 1900 in the United States; US) is largely dependent on tree-ring-based reconstructions. Large-scale soil moisture reconstructions from a network of tree-ring chronologies have greatly improved our understanding of the spatial and temporal variability in hydroclimate conditions, particularly extremes of both drought and pluvial (wet) events. However, certain regions within these large-scale reconstructions in the US have a sparse network of tree-ring chronologies. Further, several chronologies were collected in the 1980s and 1990s, thus our understanding of the sensitivity of radial growth to soil moisture in the US is based on a period that experienced multiple extremely severe droughts and neglects the impacts of recent, rapid global change. In this study, we expanded the tree-ring network of the Ohio River Valley in the US, a region with sparse coverage. We used a total of 72 chronologies across 15 species to examine how increasing the density of the tree-ring network influences the representation of reconstructing the Palmer Meteorological Drought Index (PMDI). Further, we tested how the sampling date influenced the reconstruction models by creating reconstructions that ended in the year 1980 and compared them to reconstructions ending in 2010 from the same chronologies. We found that increasing the density of the tree-ring network resulted in reconstructed values that better matched the spatial variability of instrumentally recorded droughts and to a lesser extent, pluvials. By sampling tree in 2010 compared to 1980, the sensitivity of tree rings to PMDI decreased in the southern portion of our region where severe drought conditions have been absent over recent decades. We emphasize the need of building a high-density tree-ring network to better represent the spatial variability of past droughts and pluvials. Further, chronologies on the International Tree-Ring Data Bank need updating regularly to better understand how the sensitivity of tree rings to climate may vary through time.

scholarly journals TRUMP’S FOREIGN POLICY: PLANS AND REALITIES

2018 ◽  
pp. 73-82 ◽  
Author(s):  
E. V. Emelianov
Keyword(s):  
Foreign Trade ◽  
The United States ◽  
First Year ◽  
Solar Panels ◽  
White House ◽  
Trade Law ◽  
The Us ◽  
Second Year ◽  
Trade Partners

The article considers the changes in US foreign trade policy at the beginning of the Trump’s presidency. Exporting is a critical component for the long-term growth and the U.S. economy overall, and supporting millions of jobs in US. Though D. Trump campaigned for president as a protectionist, there was no such steps the first year of his presidency. But his second year in the White House began with announcing new tariffs on solar panels, washing machines, then on steel, aluminium. As concerning steel products, the United States being the world’s largest steel importer have persistent trade deficit.The US trade law allows the president to limit imports in case if domestic industries are threatened, against unfair foreign trade practices for a period of time, but such measures were not frequent in US practice. Meanwhile new protectionist measures are debated. Trump’s policy is being opposed not only by trade partners of the US, but in the US as well, by those who argue that protectionist measures will complicate international relationships.

7. America in the 1990s: searching for purpose

2018 ◽  
Author(s):  
John Dumbrell
Keyword(s):  
Foreign Policy ◽  
American Foreign Policy ◽  
External Environment ◽  
The United States ◽  
Bill Clinton ◽  
First Year ◽  
Policy Makers ◽  
International Environment ◽  
The Us ◽  
Internal Pressures

This chapter examines how the external environment of US foreign policy and internal pressures on policy makers both shifted radically in the 1990s. Internationally, the ‘long 1990s’ were characterized by intense democratic possibility. Yet they were also years of atavistic negativity and irrationality, as seen in Rwanda and Bosnia. Two questions arise: First, how should the United States respond to a world which was apparently both rapidly integrating and rapidly disintegrating? Second, was it inevitable, desirable, or even possible that the US should provide global leadership? Before discussing various approaches to these questions, the chapter considers the wider international environment of apparent unipolarity and globalization. It also analyzes the development of American foreign policy under presidents George H. W. Bush and Bill Clinton, focusing in particular on the so-called ‘Kennan sweepstakes’ during the first year of Clinton’s presidency as well as Clinton’s turn towards unilateralism and remilitarization.

Introduction

2019 ◽  
pp. 1-15
Author(s):  
Charlie Laderman
Keyword(s):  
United States ◽  
Twentieth Century ◽  
Large Scale ◽  
The United States ◽  
Great Powers ◽  
Great Power ◽  
World Power ◽  
The Us ◽  
Eastern Question

This introductory chapter outlines why the American response to the destruction of the Ottoman Armenians offers such critical insights into the US rise to world power, its evolving relationship with Britain, and the development of ideas on humanitarian intervention and global order at the turn of the twentieth century. It introduces the Armenian question, setting it within the larger Eastern question, and explains why the Ottoman Empire became a target for outside intervention by the European great powers in the nineteenth century. It explains why the United States, which had traditionally avoided political entanglement in the Near East even while its missionaries established an exceptional role there, began to take a greater interest in the region as its emergence as a great power coincided with the first large-scale Armenian massacres.

AIR TRANSPORTATION POLICY FOR SMALL COMMUNITIES: LESSONS FROM THE U.S. EXPERIENCE

2011 ◽  
Vol 2 (2) ◽  
pp. 1-27 ◽  
Author(s):  
Alda Metrass-Mendes ◽  
Richard De Neufville
Keyword(s):  
Large Scale ◽  
The United States ◽  
Transportation Policy ◽  
Small Communities ◽  
Large Scale Analysis ◽  
Global Trend ◽  
Airline Deregulation ◽  
The Us ◽  
Air Carriers ◽  
The U.S

The last decades have witnessed a global trend toward airline deregulation, which has significant impacts on national policies regarding air accessibility to smaller communities. One important result of this liberalisation is that carriers are no longer constrained to serve routes, and may thus neglect service to less profitable destinations with lower traffic. Economic deregulation can therefore have detrimental effects on smaller communities. The United States has dealt with this issue through its Essential Air Service program. Its experience suggests lessons for other countries. U.S. policies have been reasonably successful in sustaining basic air service to smaller communities over the past thirty years of deregulation. Moreover, they have done so relatively effectively and efficiently. A large-scale analysis of the U.S. experience, and three case studies of the communities of Columbia and Jefferson City (Missouri), Rutland (Vermont), and Merced (California) demonstrate this phenomenon. The results show overall gains in efficiency, mostly attributable to the US policy of encouraging competition between air carriers seeking to provide service to small communities. The major flaw in the U.S. arrangements seems to be that the policies have not kept up with changing conditions since deregulation in 1978.

scholarly journals Crisis Standards of Care Implementation at the State Level in the United States

2020 ◽  
Vol 35 (6) ◽  
pp. 599-603 ◽  
Author(s):  
Colton Margus ◽  
Ritu R. Sarin ◽  
Michael Molloy ◽  
Gregory R. Ciottone
Keyword(s):  
United States ◽  
Large Scale ◽  
State Level ◽  
The United States ◽  
The State ◽  
Pediatric Care ◽  
Standards Of Care ◽  
Institute Of Medicine ◽  
Full Spectrum ◽  
The Us

AbstractIntroduction:In 2009, the Institute of Medicine published guidelines for implementation of Crisis Standards of Care (CSC) at the state level in the United States (US). Based in part on the then concern for H1N1 pandemic, there was a recognized need for additional planning at the state level to maintain health system preparedness and conventional care standards when available resources become scarce. Despite the availability of this framework, in the years since and despite repeated large-scale domestic events, implementation remains mixed.Problem:Coronavirus disease 2019 (COVID-19) rejuvenates concern for how health systems can maintain quality care when faced with unrelenting burden. This study seeks to outline which states in the US have developed CSC and which areas of care have thus far been addressed.Methods:An online search was conducted for all 50 states in 2015 and again in 2020. For states without CSC plans online, state officials were contacted by email and phone. Public protocols were reviewed to assess for operational implementation capabilities, specifically highlighting guidance on ventilator use, burn management, sequential organ failure assessment (SOFA) score, pediatric standards, and reliance on influenza planning.Results:Thirty-six states in the US were actively developing (17) or had already developed (19) official CSC guidance. Fourteen states had no publicly acknowledged effort. Eleven of the 17 public plans had updated within five years, with a majority addressing ventilator usage (16/17), influenza planning (14/17), and pediatric care (15/17), but substantially fewer addressing care for burn patients (9/17).Conclusion:Many states lacked publicly available guidance on maintaining standards of care during disasters, and many states with specific care guidelines had not sufficiently addressed the full spectrum of hazard to which their health care systems remain vulnerable.

Developments in adhesively bonding the wings of the SAAB 340 and 2000 aircraft

1997 ◽  
Vol 211 (3) ◽  
pp. 133-156 ◽  
Author(s):  
L J Hart-Smith ◽  
G Strindberg
Keyword(s):  
Large Scale ◽  
Adhesive Bonding ◽  
Research Programme ◽  
The United States ◽  
Bond Line ◽  
Lessons Learned ◽  
Us Air Force ◽  
The Us ◽  
Production Programme ◽  
Tooling Technology

The development of the adhesive bonding of the wing of the SAAB 340 and 2000 aircraft is traced from the development of the technology during the Primary Adhesively Bonded Structure Technology (PABST) research programme performed at Douglas Aircraft under contract to the US Air Force Wright Laboratories in the late 1970s through initial fabrication by Fairchild in America in the early 1980s to series production by SAAB in Sweden and, today, also by CASA in Spain. The saga of solving a processing problem encountered in America before the first aircraft was delivered is recounted as an object lesson in how to approach problems and in the benefits derived by doing so promptly and thoroughly. Every aspect of the problem was identified and replicated in the laboratory where, because it was understood properly, it could be duplicated and prevented at will. The lessons learned about bonding tool designs from this investigation and during the manufacture of the PABST fuselage were implemented during the transfer of production of the wing from America to Sweden. The use of a floating caul plate, rather than a traditional rigid bonding tool, is explained. The justification for doing so is the virtual elimination of all fit problems and the production of a far more uniform void-free bond line. In addition, the evolution of progressively simpler, yet more effective, bagging procedures is also described, culminating in a refinement of a technique pioneered by Fokker in Holland. Today, all breather and bleeder layers have been eliminated. This reduces costs and the need for disposal of costly expendable materials and also permits a positive check of the fit of the details by visual examination through the transparent bag once the vacuum is drawn before the assembly is inserted into the autoclave, giving an opportunity to correct any misfits while it is still possible to do so. Consequently, there is also no need for traditional verifilm operations. The tooling technology developed during the PABST programme did not die when the contract was completed with no follow-on production programme for large transport aircraft in the United States. It is alive and flourishing in Sweden. In addition, as the paper describes, the transfer of the technology was so complete that it has since been improved upon. Today, the bonding of the stiffened wing skins for these two aircraft is probably the most advanced and simultaneously the most forgiving production application of large-scale metal bonding the world has yet seen.

The 2,000 Mile Wall in Search of a Purpose: Since 2007 Visa Overstays have Outnumbered Undocumented Border Crossers by a Half Million

2017 ◽  
Vol 5 (1) ◽  
Author(s):  
Robert Warren ◽  
Donald Kerwin
Keyword(s):  
United States ◽  
Homeland Security ◽  
Large Scale ◽  
The United States ◽  
Immigration Enforcement ◽  
Border Patrol ◽  
The Us ◽  
Mexico Border ◽  
Border Crossers ◽  
Us Mexico Border

The Trump administration has made the construction of an “impregnable” 2,000-mile wall across the length of the US-Mexico border a centerpiece of its executive orders on immigration and its broader immigration enforcement strategy. This initiative has been broadly criticized based on: Escalating cost projections: an internal Department of Homeland Security (DHS) study recently set the cost at $21.6 billion over three and a half years; Its necessity given the many other enforcement tools — video surveillance, drones, ground sensors, and radar technologies — and Border Patrol personnel, that cover the US-Mexico border: former DHS Secretary Michael Chertoff and other experts have argued that a wall does not add enforcement value except in heavy crossing areas near towns, highways, or other “vanishing points” (Kerwin 2016); Its cost-effectiveness given diminished Border Patrol apprehensions (to roughly one-fourth the level of historic highs) and reduced illegal entries (to roughly one-tenth the 2005 level according to an internal DHS study) (Martinez 2016); Its efficacy as an enforcement tool: between FY 2010 and FY 2015, the current 654-mile pedestrian wall was breached 9,287 times (GAO 2017, 22); Its inability to meet the administration’s goal of securing “operational control” of the border, defined as “the prevention of all unlawful entries to the United States” (White House 2017); Its deleterious impact on bi-national border communities, the environment, and property rights (Heyman 2013); and Opportunity costs in the form of foregone investments in addressing the conditions that drive large-scale migration, as well as in more effective national security and immigration enforcement strategies. The Center for Migration Studies (CMS) has reported on the dramatic decline in the US undocumented population between 2008 and 2014 (Warren 2016). In addition, a growing percentage of border crossers in recent years have originated in the Northern Triangle states of Central America (CBP 2016). These migrants are fleeing pervasive violence, persecution, and poverty, and a large number do not seek to evade arrest, but present themselves to border officials and request political asylum. Many are de facto refugees, not illegal border crossers. This report speaks to another reason to question the necessity and value of a 2,000-mile wall: It does not reflect the reality of how the large majority of persons now become undocumented. It finds that two-thirds of those who arrived in 2014 did not illegally cross a border, but were admitted (after screening) on non-immigrant (temporary) visas, and then overstayed their period of admission or otherwise violated the terms of their visas. Moreover, this trend in increasing percentages of visa overstays will likely continue into the foreseeable future. The report presents information about the mode of arrival of the undocumented population that resided in the United States in 2014. To simplify the presentation, it divides the 2014 population into two groups: overstays and entries without inspection (EWIs). The term overstay, as used in this paper, refers to undocumented residents who entered the United States with valid temporary visas and subsequently established residence without authorization. The term EWI refers to undocumented residents who entered without proper immigration documents across the southern border. The estimates are based primarily on detailed estimates of the undocumented population in 2014 compiled by CMS and estimates of overstays for 2015 derived by DHS. Major findings include the following: In 2014, about 4.5 million US residents, or 42 percent of the total undocumented population, were overstays. Overstays accounted for about two-thirds (66 percent) of those who arrived (i.e., joined the undocumented population) in 2014. Overstays have exceeded EWIs every year since 2007, and 600,000 more overstays than EWIs have arrived since 2007. Mexico is the leading country for both overstays and EWIs; about one- third of undocumented arrivals from Mexico in 2014 were overstays. California has the largest number of overstays (890,000), followed by New York (520,000), Texas (475,000), and Florida (435,000). Two states had 47 percent of the 6.4 million EWIs in 2014: California (1.7 million) and Texas (1.3 million). The percentage of overstays varies widely by state: more than two-thirds of the undocumented who live in Hawaii, Massachusetts, Connecticut, and Pennsylvania are overstays. By contrast, the undocumented population in Kansas, Arkansas, and New Mexico consists of fewer than 25 percent overstays.  

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