scholarly journals Determining the spatial and seasonal variability in OM/OC ratios across the US using multiple regression

2010 ◽  
Vol 10 (10) ◽  
pp. 24651-24698 ◽  
Author(s):  
H. Simon ◽  
P. V. Bhave ◽  
J. L. Swall ◽  
N. H. Frank ◽  
W. C. Malm
Keyword(s):  
United States ◽  
Spatial Variability ◽  
Multiple Regression ◽  
The United States ◽  
Organic Mass ◽  
The West ◽  
The Us ◽  
Abstract Data ◽  
Regression Techniques

Abstract. Data from the Interagency Monitoring of Protected Visual Environments (IMPROVE) network are used to estimate organic mass to organic carbon (OM/OC) ratios across the United States by extending previously published multiple regression techniques. Our new methodology addresses common pitfalls of multiple regression including measurement uncertainty, colinearity of covariates, and dataset selection. As expected, summertime OM/OC ratios are larger than wintertime values across the US with all regional median OM/OC values tightly confined between 1.8 and 1.95. Further, we find that OM/OC ratios during the winter are distinctly larger in the eastern US than in the West (regional medians are 1.58, 1.64, and 1.85 in the great lakes, southeast, and northeast regions, versus 1.29 and 1.32 in the western and central states). We find less spatial variability in long-term averaged OM/OC ratios across the US (90% of our multiyear regressions predicted OM/OC ratios between 1.37 and 1.94) than previous studies (90% of OM/OC estimates from a previous regression study fell between 1.30 and 2.10). We attribute this difference largely to the inclusion of EC as a covariate in previous regression studies. Due to the colinearity of EC and OC, we believe that up to one-quarter of the OM/OC estimates in a previous study are biased low. In addition to estimating OM/OC ratios, our technique reveals trends that may be contrasted with conventional assumptions regarding nitrate, sulfate, and soil across the IMPROVE network. For example, our regressions show pronounced seasonal and spatial variability in both nitrate volatilization and sulfate neutralization and hydration.

scholarly journals Determining the spatial and seasonal variability in OM/OC ratios across the US using multiple regression

2011 ◽  
Vol 11 (6) ◽  
pp. 2933-2949 ◽  
Author(s):  
H. Simon ◽  
P. V. Bhave ◽  
J. L. Swall ◽  
N. H. Frank ◽  
W. C. Malm
Keyword(s):  
Spatial Variability ◽  
Multiple Regression ◽  
The United States ◽  
Organic Mass ◽  
The West ◽  
The Us ◽  
Abstract Data ◽  
Regression Techniques ◽  
Measurement Artifacts

Abstract. Data from the Interagency Monitoring of Protected Visual Environments (IMPROVE) network are used to estimate organic mass to organic carbon (OM/OC) ratios across the United States by extending previously published multiple regression techniques. Our new methodology addresses common pitfalls of multiple regression including measurement uncertainty, colinearity of covariates, dataset selection, and model selection. As expected, summertime OM/OC ratios are larger than wintertime values across the US with all regional median OM/OC values tightly confined between 1.80 and 1.95. Further, we find that OM/OC ratios during the winter are distinctly larger in the eastern US than in the West (regional medians are 1.58, 1.64, and 1.85 in the great lakes, southeast, and northeast regions, versus 1.29 and 1.32 in the western and central states). We find less spatial variability in long-term averaged OM/OC ratios across the US (90% of our multiyear regressions estimate OM/OC ratios between 1.37 and 1.94) than previous studies (90% fell between 1.30 and 2.10). We attribute this difference largely to the inclusion of EC as a covariate in previous regression studies. Due to the colinearity of EC and OC, we find that up to one-quarter of the OM/OC estimates in a previous study are biased low. Assumptions about OC measurement artifacts add uncertainty to our estimates of OM/OC. In addition to estimating OM/OC ratios, our technique reveals trends that may be contrasted with conventional assumptions regarding nitrate, sulfate, and soil across the IMPROVE network. For example, our regressions show pronounced seasonal and spatial variability in both nitrate volatilization and sulfate neutralization and hydration.

Mafias on the Move

2011 ◽  
Author(s):  
Federico Varese
Keyword(s):  
United States ◽  
New York ◽  
Organized Crime ◽  
The United States ◽  
The West ◽  
Market Expansion ◽  
The North ◽  
Economic Transformations ◽  
At Will

Organized crime is spreading like a global virus as mobs take advantage of open borders to establish local franchises at will. That at least is the fear, inspired by stories of Russian mobsters in New York, Chinese triads in London, and Italian mafias throughout the West. As this book explains, the truth is more complicated. The author has spent years researching mafia groups in Italy, Russia, the United States, and China, and argues that mafiosi often find themselves abroad against their will, rather than through a strategic plan to colonize new territories. Once there, they do not always succeed in establishing themselves. The book spells out the conditions that lead to their long-term success, namely sudden market expansion that is neither exploited by local rivals nor blocked by authorities. Ultimately the inability of the state to govern economic transformations gives mafias their opportunity. In a series of matched comparisons, the book charts the attempts of the Calabrese 'Ndrangheta to move to the north of Italy, and shows how the Sicilian mafia expanded to early twentieth-century New York, but failed around the same time to find a niche in Argentina. The book explains why the Russian mafia failed to penetrate Rome but succeeded in Hungary. A pioneering chapter on China examines the challenges that triads from Taiwan and Hong Kong find in branching out to the mainland. This book is both a compelling read and a sober assessment of the risks posed by globalization and immigration for the spread of mafias.

From Start-Up to Scale-Up

2018 ◽  
Author(s):  
Gilles Duruflé ◽  
Thomas Hellmann ◽  
Karen Wilson
Keyword(s):  
United States ◽  
Conceptual Framework ◽  
Public Policies ◽  
Scale Up ◽  
The United States ◽  
Smart Money ◽  
Start Up ◽  
The Us ◽  
The Creation

This chapter examines the challenge for entrepreneurial companies of going beyond the start-up phase and growing into large successful companies. We examine the long-term financing of these so-called scale-up companies, focusing on the United States, Europe, and Canada. The chapter first provides a conceptual framework for understanding the challenges of financing scale-ups. It emphasizes the need for investors with deep pockets, for smart money, for investor networks, and for patient money. It then shows some data about the various aspects of financing scale-ups in the United States, Europe, and Canada, showing how Europe and Canada are lagging behind the US relatively more at the scale-up than the start-up stage. Finally, the chapter raises the question of long-term public policies for supporting the creation of a better scale-up environment.

scholarly journals Go West: surgical fellowships in the US

2008 ◽  
Vol 90 (8) ◽  
pp. 272-274
Author(s):  
Matt Freudmann ◽  
Lucy Wales
Keyword(s):  
United States ◽  
Vascular Surgery ◽  
Surgical Training ◽  
The United States ◽  
University Of Minnesota ◽  
The West ◽  
Transplant Centre ◽  
Transplant Center ◽  
The Us ◽  
The University

As a final-year trainee in vascular surgery, I was working at the West London Renal and Transplant Centre for Professor Nadey Hakim and Vassilios Papalois. I am very grateful to both of them for encouraging me to apply for a visiting fellowship to the United States, enabling me to experience some of the benefits of surgical training abroad and to broaden my perspectives in transplantation. I was awarded a visiting fellowship to the University of Minnesota Transplant Center by Professor David Sutherland, head of the division of transplant surgery.

How Prevalent is Performance-Related Pay in the United States? Current Incidence and Recent Trends

2013 ◽  
Vol 226 ◽  
pp. R4-R16 ◽  
Author(s):  
Maury Gittleman ◽  
Brooks Pierce
Keyword(s):  
United States ◽  
Explanatory Power ◽  
The United States ◽  
High Wage ◽  
Potential Explanation ◽  
Us Economy ◽  
The Us ◽  
Recent Trends ◽  
Current Incidence

We address basic questions about performance-related pay in the US. How widespread is it? What characteristics of employers and jobs are associated with it? What are recent trends in its incidence? What factors are responsible for these trends? Nearly two-fifths of hours worked in the US economy in 2013 were in jobs with performance-related pay, but this share has been declining. We consider several possible causes for this trend and find that they do not have much explanatory power. We do establish, however, that any potential explanation must also account for a long-term shift in the relative incidence of performance-related pay away from low-wage and toward high-wage jobs.

Globalization and growth of US university patenting (2009–2014)

2016 ◽  
Vol 30 (4) ◽  
pp. 257-266 ◽  
Author(s):  
Loet Leydesdorff ◽  
Henry Etzkowitz ◽  
Duncan Kushnir
Keyword(s):  
United States ◽  
The United States ◽  
University Patenting ◽  
Flat Rate ◽  
The United Kingdom ◽  
University Patents ◽  
The Us ◽  
The University ◽  
Us University

Following a pause, with a relatively flat rate, from 1998 to 2008, the long-term trend of university patenting rising as a share of all patenting has resumed, driven by the internationalization of academic entrepreneurship and the persistence of US university technology transfer. The authors disaggregate this recent growth in university patenting at the US Patent and Trademark Organization (USPTO) in terms of nations and patent classes. Foreign patenting in the United States almost doubled during the period 2009–2014, mainly due to patenting by universities in Taiwan, Korea, China and Japan. These nations compete with the United States in terms of patent portfolios, whereas most European countries – with the exception of the United Kingdom – have more specific portfolios, mainly in biomedical fields. In the case of China, Tsinghua University holds 63% of the university patents in USPTO; followed by King Fahd University with 55.2% of the national portfolio.

Much could upset deal on Bosnian state government

2019 ◽  
Keyword(s):  
United States ◽  
State Government ◽  
The United States ◽  
The West ◽  
Content Type ◽  
The Balkans ◽  
The Us

Significance Under pressure from the US and EU ambassadors, Bosnia's leaders have reached agreement to form a state government. The breakthrough has provided a badly needed respite from political paralysis; it required difficult concessions from all sides. Impacts By emphasising each side's concessions, politically affiliated media could jeopardise a shaky settlement. The United States and EU are too preoccupied with mainly internal problems to re-engage in Bosnia or the Balkans more concretely. Tensions between Russia and the West are being reflected in Bosnian politics.

scholarly journals A Guide to the “New” Chinese History: Recent Publications Concerning Chinese Social and Economic Development before 1800

1988 ◽  
Vol 33 (2) ◽  
pp. 148-201 ◽  
Author(s):  
Harriet T. Zurndorfer
Keyword(s):  
United States ◽  
Chinese Population ◽  
The United States ◽  
Chinese History ◽  
Demographic Expansion ◽  
The West ◽  
State And Society ◽  
Social And Economic Development ◽  
Production And Distribution

SummaryDuring the last 15 years or so, the study of Chinese history in the United States and Europe has been transformed through new foci of interest as well as the employment of social science methodologies. This article surveys a selected number of recent publications and categorizes them according to five themes: “commoners, women, and outsiders”, “the structural approach”, “state and society”, “China andl'histoire globale”, and “China and the West”. It is demonstrated that the continuities within Chinese development, including the progressive demographic expansion of the Chinese population, the formulation and exercise of gentry rulership, the general vigour of the economy, and increased regional and subregional agricultural/industrial production and distribution are not confined to specific dynastic periods and should be viewed in a long-term context.

scholarly journals The Iranian-American competition in Iraq: the political defeat of the United States

2021 ◽  
pp. 0
Author(s):  
Nikolay Bobkin
Keyword(s):  
United States ◽  
The United States ◽  
The Political ◽  
Us Military ◽  
Military Presence ◽  
Scientific Hypothesis ◽  
The Us ◽  
Political Advantage ◽  
Invasion Of Iraq

The article gives an assessment of Iran's policy in neighboring Iraq during the years of the American occupation. The author's scientific hypothesis is that after the US invasion of Iraq in 2003, Iran, and not America, became the real beneficiary of the overthrow of Saddam Hussein. The Iranian leadership, interested in changing the Baathist regime in Baghdad, having received such a strategic gift, did everything to use the US military presence to its advantage. The purpose of this study is to analyze the strategy of expanding Iran's influence in Iraq and its impact on US policy. The article shows that the nature of Iran's influence in Iraq included all the elements of state power: diplomatic, informational, military and economic. It is concluded that Tehran managed to take advantage of the democratic reforms in Iraq, which were carried out under the control of Washington. Iran used its Shiite henchmen, which gave it a political advantage over the United States, which did not have such influential allied forces in Iraq. Despite the disparate balance of military forces with America, Iran managed to avoid the risk of war with the United States and move on to achieving its long-term goals in Iraq. In the future, Tehran plans to achieve the rejection of Baghdad from constructive relations with Washington.

scholarly journals The impact of Sino-US trade friction on Sino-Russian soybean trade cooperation

2021 ◽  
Vol 204 (01) ◽  
pp. 91-98
Author(s):  
Cyucze Chen'
Keyword(s):  
United States ◽  
The United States ◽  
Agricultural Trade ◽  
Trade Friction ◽  
The Us ◽  
Belt And Road ◽  
Trade Frictions ◽  
The Impact ◽  
Soybean Trade

Abstract. Since entering the 21st century, trade frictions between China and the United States have occurred frequently. In response to the escalation of the US provocation, China began to impose a 25 % tariff on US soybeans. The hindrance of Sino-US soybean trade has brought new opportunities for the development of Sino-Russian soybean trade. Purpose. This article analyzes the current situation of China-Russia soybean trade cooperation in the context of Sino-US trade frictions, and analyzes the current constraints and favorable opportunities in the development of the Sino-Russian soybean trade industry. Methods. The study used monographic, abstract-logical methods and the method of comparative analysis. Results. It can be said that Sino-US trade friction has objectively injected new momentum into Sino-Russian agricultural cooperation, and soybeans have become a new growth point in Sino-Russian agricultural cooperation. In the context of the “Belt and Road” initiative and the long-term trade competition between China and the United States, it is of great significance to further strengthen Sino-Russian agricultural cooperation and increase the level of agricultural trade represented by soybeans between the two countries. The scientific novelty of the research lies in the analysis of limited factors of influence and indication of a new direction of cooperation in the field of soybeans between the PRC and the Russian Federation.

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