scholarly journals Cabomba caroliniana A. Gray 1837: A new, alien and potentially invasive species in Serbia

2013 ◽  
Vol 65 (4) ◽  
pp. 1515-1520 ◽  
Author(s):  
Dragana Vukov ◽  
Tamara Jurca ◽  
M. Rucando ◽  
Ruzica Igic ◽  
B. Miljanovic
Keyword(s):  
Invasive Species ◽  
Aquatic Vegetation ◽  
Southeastern United States ◽  
Field Studies ◽  
Aquatic Weed ◽  
The United Kingdom ◽  
The Usa ◽  
Canal Network ◽  
Cabomba Caroliniana ◽  
Northeastern Argentina

During field studies of the vegetation in the canal network of the Hydro-System Danube-Tisa-Danube in Serbia, in 2008, 2011 and 2012, populations of Cabomba caroliniana A. Gray 1837 were recorded. Cabomba caroliniana was not previously recorded in the aquatic vegetation in Serbia. It is a popular aquarium plant native to South America (Brazil, Uruguay, Paraguay, and northeastern Argentina) and, according to some authors, to southeastern United States. It was introduced into the rest of the USA, Canada, Australia, Asia (China, Malaysia, India, Japan), and in many regions of its new range it is considered an invasive and noxious aquatic weed. In Europe, it was found in the United Kingdom (introduced to England), Belgium, the Netherlands, and Hungary. Newly recorded populations in Serbia are restricted to the canals in Backa. Populations are established only on two localities (Mali Stapar and Odzaci).

Denitrification of Sewage Effluents in Deep Bed Sand Filters

1993 ◽  
Vol 27 (5-6) ◽  
pp. 381-390 ◽  
Author(s):  
John Upton
Keyword(s):  
Waste Water ◽  
Pilot Study ◽  
Water Industry ◽  
Trickling Filter ◽  
Sand Filters ◽  
The United Kingdom ◽  
The Usa ◽  
Water Plants ◽  
The Cost ◽  
Pilot Plant Study

The European waste water industry will need to develop denitrification processes to remove nitrogen as pressures increase to reduce nutrient levels discharged in effluents. In the USA deep bed filter technology has been used extensively to provide denitrification to levels less than 5 mg/l TN. This paper describes this technology and the full scale performance at some waste water plants in Florida, USA. This paper also describes a pilot study in the United Kingdom at Severn Trent Water. The results of the pilot plant study indicate that denitrification in deep bed sand filters is a sound robust technology using methanol addition. Nitrogen removals greater than the 70% required in the EC Directive 1991 are possible at winter sewage temperatures. The process is most suitable for achieving nitrogen removal at trickling filter plants. The cost of methanol addition is calculated to be ₤10/1000m3.

Hunting the eagle killer: A cyanobacterial neurotoxin causes vacuolar myelinopathy

Science ◽  
2021 ◽  
Vol 371 (6536) ◽  
pp. eaax9050
Author(s):  
Steffen Breinlinger ◽  
Tabitha J. Phillips ◽  
Brigette N. Haram ◽  
Jan Mareš ◽  
José A. Martínez Yerena ◽  
...  
Keyword(s):  
United States ◽  
Aquatic Vegetation ◽  
Southeastern United States ◽  
Hydrilla Verticillata ◽  
Toxin Production ◽  
The United States ◽  
Biosynthetic Gene Cluster ◽  
Biosynthetic Gene ◽  
Bald Eagles ◽  
Cyanobacterial Species

Vacuolar myelinopathy is a fatal neurological disease that was initially discovered during a mysterious mass mortality of bald eagles in Arkansas in the United States. The cause of this wildlife disease has eluded scientists for decades while its occurrence has continued to spread throughout freshwater reservoirs in the southeastern United States. Recent studies have demonstrated that vacuolar myelinopathy is induced by consumption of the epiphytic cyanobacterial species Aetokthonos hydrillicola growing on aquatic vegetation, primarily the invasive Hydrilla verticillata. Here, we describe the identification, biosynthetic gene cluster, and biological activity of aetokthonotoxin, a pentabrominated biindole alkaloid that is produced by the cyanobacterium A. hydrillicola. We identify this cyanobacterial neurotoxin as the causal agent of vacuolar myelinopathy and discuss environmental factors—especially bromide availability—that promote toxin production.

Lament and Revenge in the Hekabe of Euripides

2007 ◽  
Vol 23 (1) ◽  
pp. 49-57 ◽  
Author(s):  
Christian M. Billing
Keyword(s):  
Social Control ◽  
Early Modern ◽  
Fifth Century ◽  
Historical Evidence ◽  
Funerary Practices ◽  
The United Kingdom ◽  
The Usa ◽  
The University ◽  
The Relationship ◽  
Female Lament

In this article Christian M. Billing considers the relationship between female lament and acts of vengeance in fifth-century Athenian society and its theatre, with particular emphasis on the Hekabe of Euripides. He uses historical evidence to argue that female mourning was held to be a powerfully transgressive force in the classical period; that considerable social tensions existed as a result of the suppression of female roles in traditional funerary practices (social control arising from the move towards democracy and the development of forensic processes as a means of social redress); and that as a piece of transvestite theatre, authored and performed by men to an audience made up largely, if not entirely, of that sex, Euripides' Hekabe demonstrates significant gender-related anxiety regarding the supposedly horrific consequences of allowing women to speak at burials, or to engage in lament as part of uncontrolled funerary ritual. Christian M. Billing is an academic and theatre practitioner working in the fields of ancient Athenian and early modern English and European drama. He has worked extensively as a director and actor and has also taught at a number of universities in the United Kingdom and the USA. He is currently Lecturer in Drama at the University of Hull.

scholarly journals Shareholder nationality among the major European and American defense contractors: an exploratory data analysis

2019 ◽  
Vol 1 (2) ◽  
pp. 36-49
Author(s):  
Mahdi FAWAZ ◽  
Jean BELIN ◽  
Hélène MASSON
Keyword(s):  
United States ◽  
Exploratory Data Analysis ◽  
The United States ◽  
Investment Funds ◽  
Defense Contractors ◽  
The United Kingdom ◽  
The World ◽  
First Results ◽  
The Usa ◽  
Exploratory Data

This article presents the first results of a statistical analysis of the ownership links between the major European and American defence contractors. This approach, centred on the shareholders and subsidiaries of these companies, enables us to explore the depth of the national links (company and country of origin) and the density of the ownership cooperation that exists within Europe, as well as with the rest of the world, particularly the United States. Information about defence contractors’ ownership links is difficult to obtain and precautions must be taken in the interpretation of the results.  In terms of defence contractor shareholders, it would appear first that the national link is strong for Sweden, Spain and France, less so for Germany and Italy, and particularly weak for the United Kingdom. Next, in European terms the links are concentrated on Airbus, MBDA and KNDS and are little developed in other companies. Finally, we observe asymmetrical links with the USA and a significant presence of American investment funds.

scholarly journals Cooperation and Coopetition as a Tools Which Could Improve Leading Startups all over the World

2017 ◽  
Vol 11 (2) ◽  
pp. 228
Author(s):  
Aneta Ejsmont
Keyword(s):  
United States ◽  
The United States ◽  
Good News ◽  
The European Union ◽  
The United Kingdom ◽  
The World ◽  
The Usa ◽  
Leading Position ◽  
Foreign Sale ◽  
The Moment

Building own business is a long-term and laborious process. A person who leads a startup tries to start with building own business by taking first steps toward financial independence. Analyzing conditions in Poland, on average every second startup sells its services abroad, admittedly it is good news, although half of them do not export at all. Half of the startups which export their services and goods generates more than 50% of their revenues outside Poland. Very interesting is the fact that 60% of exporters have conducted their foreign sale since the moment of establishing their business. On which markets do they sell their services? It turns out that the most popular are markets in the European Union (54%), including the United Kingdom 14% and Germany 9%. Only about 25% of Polish startups exports their products and services to the United States. Taking the United States into consideration, in 2008 the USA lost their leading position in the number of startups which are newly created and achieving success in business. Currently in terms of the number of new startups the USA is on a quite distant place after Denmark, Finland, Sweden, Hungary, New Zealand, Israel or Italy. In short, more companies were closed than created, so it was, as a matter of fact, like in Poland. Therefore, the condition to improve the development of startups both from Poland and other countries all the world is to increase cooperation and coopetition.

scholarly journals The 2010 Structural-Demographic Forecast for the 2010–2020 Decade: A Retrospective Assessment

2020 ◽  
Author(s):  
Peter Turchin ◽  
Andrey Korotayev
Keyword(s):  
Western Europe ◽  
Time Series Data ◽  
Political Instability ◽  
The United States ◽  
Stress Index ◽  
Series Data ◽  
Strongly Correlated ◽  
Retrospective Assessment ◽  
The United Kingdom ◽  
The Usa

This article revisits the prediction, made in 2010, that the 2010–2020 decade would likely be a period of growing instability in the United States and Western Europe (Turchin 2010). This prediction was based on a computational model that quantified in the USA such structural-demographic forces for instability as popular immiseration, intraelite competition, and state weakness prior to 2010. Using these trends as inputs, the model calculated and projected forward in time the Political Stress Index, which in the past was strongly correlated with socio-political instability. Ortmans et al. (2017) conducted a similar structural-demographic study for the United Kingdom and obtained similar results. Here we use the Cross-National Time-Series Data Archive for the US, UK, and Western European countries to assess these structural-demographic predictions. We find that such measures of socio-political instability as anti-government demonstrations and riots increased dramatically during the 2010–2020 decade in all of these countries.

scholarly journals Optimizing the location of watercraft inspection stations to slow the spread of aquatic invasive species

2021 ◽  
Author(s):  
Robert G. Haight ◽  
Amy C. Kinsley ◽  
Szu-Yu Kao ◽  
Denys Yemshanov ◽  
Nicholas B. D. Phelps
Keyword(s):  
Invasive Species ◽  
Optimal Policy ◽  
Program Design ◽  
Programming Model ◽  
Aquatic Invasive Species ◽  
Management Objectives ◽  
Large Numbers ◽  
The Usa ◽  
Species Specific ◽  
Infestation Status

AbstractThe accidental spread of aquatic invasive species (AIS) by recreational boaters is a major concern of state and county environmental planners in the USA. While programs for watercraft inspection to educate boaters and slow AIS spread are common practice, large numbers of boats and waterbodies, together with limited budgets, make program design difficult. To facilitate program design, we developed an integer programming model for allocation of scarce inspection resources among lakes. Our model uses species-specific infestation status of lakes and estimates of boat movement between lakes. The objective is to select lakes for inspection stations to maximize the number of risky boats inspected, where risky boats are ones that move from infested to uninfested lakes. We apply our model in Stearns County in central Minnesota, USA, to prioritize lakes for inspection stations and evaluate alternative management objectives. With an objective of protecting uninfested lakes within and outside Stearns County, the optimal policy is to locate stations at infested lakes having the most boats departing for uninfested lakes inside and outside the county. With an objective of protecting only Stearns County lakes, the optimal policy is to locate stations at both infested and uninfested lakes having the riskiest boats arriving from within and outside the county and departing to in-county lakes. The tradeoff between these objectives is significant.

Antitrust Regulation of IT Giants` Activities: Main Trends of Foreign and Russian Legislation

2021 ◽  
Author(s):  
D.V. Shram ◽  
Keyword(s):  
House Of Representatives ◽  
Network Effects ◽  
The United States ◽  
The European Union ◽  
The United Kingdom ◽  
The Us ◽  
The Usa ◽  
Economic Concentration ◽  
The Uk ◽  
Antitrust Regulation

The article is devoted to the antimonopoly regulation of IT giants` activities. The author presents an overview of the main trends in foreign and Russian legislation in this area. The problems the antimonopoly regulation of digital markets faces are the following: the complexity of determining the criteria for the dominant position of economic entities in the digital economy and the criteria for assessing the economic concentration in the commodity digital markets; the identification and suppression of cartels; the relationship between competition law and intellectual property rights in the digital age. Some aspects of these problems are considered through the prism of the main trends in the antimonopoly policy in the United States, the European Union, the United Kingdom and Russia. The investigation findings of the USA House of Representatives Antitrust Subcommittee against Apple, Google, Amazon and Facebook are presented. The author justifies the need to separate them, which requires the adoption of appropriate amendments to the antimonopoly legislation. The article analyzes the draft law of the European Commission on the regulation of digital markets – Digital Markets Act, reveals the criteria for classifying IT companies as «gatekeepers», and notes the specific approaches to antimonopoly regulation in the UK and the US. The article describes the concepts «digital platform» and «network effects», presented in the «fifth antimonopoly package of amendments», developed in 2018 by the Federal Antimonopoly Service of the Russian Federation, and gives an overview of the comments of the Ministry of Economic Development regarding these concepts wording in the text of the draft law, which formed the basis for the negative conclusion of the regulator. It is concluded that in the context of the digital markets’ globalization, there is a need for the international legal nature antitrust norms formation, since regional legislation obviously cannot cope with the monopolistic activities of IT giants.

My Initial Exposure to Andragogy

2021 ◽  
pp. 1-22
Keyword(s):  
Human Resource Development ◽  
Measurement Instrument ◽  
Self Directed Learning ◽  
Initial Exposure ◽  
Corporate Managers ◽  
Boston University ◽  
The United Kingdom ◽  
The Usa ◽  
Directed Learning ◽  
Ancient Times

This chapter shares the author's first exposure to andragogy at Boston University, including the background and research foundation giving impetus to writing this book. Kapp from Germany coined the andragogy term based on Comenius' earlier conceptions stemming from educators in ancient times. Savicevic gave andragogy strength in Europe, shared it with Knowles who advanced it in the USA through application to human resource development (HRD) and viewing self-directed learning (SDL) as most important way to implement andragogy. Hadley developed/validated an andragogy/pedagogy measurement instrument. Simpson validated andragogy in the United Kingdom. Kabuga validated andragogy in Africa. Ingalls validated andragogy's nine dimensions for corporate managers' helping workers keep abreast and up to date with their various fields. Mezirow and Suanmali developed/validated with 174 adult educators' andragogy's charter with 10 SDL items.

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