Myriophyllum spicatum (spiked watermilfoil).

Author(s):  
Kevin Murphy

Abstract M. spicatum (spiked watermilfoil) is an invasive submerged aquatic weed characteristic of temperate regions, as far north as the UK and Canada, and as far south as South Africa. It is recorded from at least 57 countries, probably native to all those Palearctic countries in which it occurs, less certainly an exotic in southern Afrotropical countries; and undoubtedly an alien invasive in the Nearctic (USA and Canada). It is a particular problem of streams, rivers and small water bodies where it primarily impedes flow and causes a range of associated environmental problems, such as water deoxygenation. Long-distance spread via the aquarium/garden trade has been a notable anthropogenic vector. Once introduced to a new region it spreads rapidly, primarily by vegetative stem fragmentation, and transport attached to boats, though seed production also occurs. It is listed as a notifiable/prohibited weed in many states and provinces of the USA and Canada, and in South Africa.

2021 ◽  
Author(s):  
Kevin Murphy

Abstract M. aquaticum (parrot-feather) is an invasive submerged/emergent aquatic weed characteristic of sub-tropical to warm-temperate regions, but found as far north as the UK (recorded from at least 33 countries: native to perhaps 6 of these, all in South America). It was recorded as an alien as early as 1906 in Florida, and 1919 in South Africa. It is a particular problem of small water bodies, irrigation channel networks, and small streams, where it primarily impedes flow and causes a range of associated environmental problems, such as water deoxygenation. Long-distance spread via the aquarium/garden trade has been a notable anthropogenic vector. Once introduced to a new region it spreads rapidly, primarily by vegetative stem fragmentation, male plants are rarely recorded outside the native range so seed production is (so-far) negligible as a vector. It is listed as a notifiable/prohibited weed in many countries and states worldwide.


Pythagoras ◽  
2009 ◽  
Vol 0 (69) ◽  
Author(s):  
Sarah Bansilal

The Common Tasks for Assessment (CTA) was a new assessment programme that was introduced in 2002 in South Africa for all Grade 9 learners. The purpose of this paper is to articulate some concerns around the use of contextualised assessment activities in the CTA. The study reported here was carried out in 2003. Data for the study was generated from lesson observations and interviews with the participant teachers and groups of learners. It is argued that although the intentions behind the design of the CTA are well meaning and noble, there are in fact some learners who may be unintentionally disadvantaged by the design of the CTA which uses an extended context as a source for all the assessment tasks. In this paper two unintended consequences of using ‘real life’ contexts are identified and the implications of these are discussed, by linking the observations to research carried out in the UK and the USA.


2020 ◽  
Vol 486 (1) ◽  
pp. 67-76 ◽  
Author(s):  
Andrey Bulakh ◽  
Paavo Härmä ◽  
Elena Panova ◽  
Olavi Selonen

AbstractRapakivi granites were in use during the Middle Ages in Finland. Their most spectacular use, however, was for structures built in St Petersburg between 1760 and 1917. Remarkable examples are the majestic and slender Alexander Column and the 112 columns of St Isaac's Cathedral. All Rapakivi granite was extracted from the Wiborg Rapakivi granite batholith in several quarries around the municipality of Virolahti in SE Finland (old Russia). Today, the 1640 Ma-old Wiborg batholith is the most important area for natural stone production in Finland and in the Leningrad region, Russian Federation. The main quarried stone varieties of Rapakivi granite (Baltic Brown, Baltic Green, Carmen Red, Karelia Red, Eagle Red and Balmoral Red) are regularly produced in large quantities in Finland for the global stone market due to the stone's unique qualities. Examples of applications in Rapakivi granite from Finland can be found in the USA, China, South Africa, the UK, Italy, Austria, Ireland, Spain and Germany as well as in Scandinavia and Russia. There are also quarries near Vyborg, the Russian Federation: Vozrozhdenie and Ala-Noskua.


2019 ◽  
Vol 11 (1) ◽  
pp. 1-26 ◽  
Author(s):  
Aparna Bhatia ◽  
Binny Makkar

Purpose This paper aims to examine and compare the nature and extent of corporate social responsibility (CSR) reporting practices of companies in developing (BRICS [Brazil, Russia, India, China and South Africa]) and developed (the USA and the UK) countries. Design/methodology/approach Content analysis is conducted on the annual reports and websites of 325 companies listed on stock exchanges of developing markets and of developed markets (Brazil – IBrX 100, 46 companies; Russia – Broad Market Index, 50 companies; India – BSE 100, 50 companies; China – SSE 180, 29 companies; South Africa – FTSE/JSE All Share index, 50 companies; the USA – NYSE 100, 50 companies; the UK – FTSE 100, 50 companies). Descriptives are used to calculate company wise and item wise scores. T-test analysis is applied to check for significant differences between mean scores of developing and developed countries. Findings The findings of the study reflect that developed countries have higher CSR disclosure scores than developing countries. Overall, mean CSR disclosure score of developed countries is 53.5%, followed by that of the developing countries at 49.4%. Developed countries take lead in CSR disclosure for all the five categories, namely, human resources, community, environment, customer and product and others. The results of independent sample T-test suggest that mean disclosure score of developing nations is significantly different from developed nations. Practical implications As suggested by the results, the gap in the CSR disclosure scores between developing and developed group of countries is not an alarming one. However, developing countries should practice CSR in spirit and not just in letter. Focus should not be on just filling the pages in black and white, rather the essence of CSR should be attained for balanced development of the country. For instance, though developing country like India has high score of CSR disclosure in contrast to each of the developed country taken in the sample, yet the country is still battling with several issues such as poverty, over-population, corruption, poor standard of working conditions for the employees and environmental conservation. Sustenance should focus upon renewable sources of energy; efforts of employees should be acknowledged offering flexible working hours; consumer trust should be built by communicating authentic and accurate information about the product. As developing countries encounter several social and environmental problems, companies must endeavor to build a healthy nation keeping in mind the welfare of all stakeholders by practicing CSR. Originality/value This study overcomes the limitations of prior cross-country studies by taking a better representative sample with greater number of countries belonging to identifiable group of “developing” and “developed” nations and thus attempts to improve generalization and authenticity of results.


2019 ◽  
Vol 20 (2) ◽  
Author(s):  
VASILY I. RADASHEVSKY ◽  
VICTORIA V. PANKOVA ◽  
VASILY V. MALYAR ◽  
TATYANA V. NERETINA ◽  
ROBIN S. WILSON ◽  
...  

The spionid polychaete Boccardia proboscidea Hartman, 1940 is a tube-dweller and shell/stone-borer widely occurring in temperate waters across the world and considered invasive in many areas. It was originally described from California, USA, and later reported from Pacific Canada, the Asian Pacific, Australia, New Zealand, Argentina, South Africa, and northern Europe. The Bayesian inference analysis of sequence data of three gene fragments (836 bp in total) of the mitochondrial 16S rDNA, nuclear 28S rDNA, and Histone 3 has shown that individuals from the Pacific coasts of Canada and the USA, Argentina, Australia, South Africa, the United Kingdom, and Mediterranean France were genetically very similar (maximal average p-distance value, 0.49%, was between 16S rDNA sequences). We consider these individuals to be conspecific and report the earliest records of B. proboscidea from the UK and a possible first Mediterranean record in the Gulf of Lion. The high 16S haplotype diversity of B. proboscidea detected in the north-eastern Pacific suggests a native distribution for the species in the northern Pacific and subsequent introductions through human activities to other parts of the world. The histories of these introductions are reviewed and the hypotheses about times and places of introductions are updated.


Author(s):  
Andre Botha ◽  
Andrea Saayman

This paper models tourism demand for South Africa from the UK and the USA, using an almost ideal demand system. An error-correction almost ideal demand system (EC-AIDS) is applied to quantify the responsiveness of UK and USA tourism demand for South Africa, relative to changes in tourism prices and expenditure or income. Short-term own-price, cross-price and expenditure elasticities are derived from the EC-AIDS models. One of the key findings of the paper is that tourism from the UK and USA is not sensitive to price changes in South Africa in the short term. Tourism to South Africa is found to be more income-elastic than price-elastic, indicating that the country is vulnerable to changing world economic conditions. Even though price competitiveness does not yet seem to be a key concern, significant substitution effects are present, with especially Spain and Malaysia benefiting from a decline in South Africa’s price competitiveness.


2014 ◽  
Vol 58 (2) ◽  
pp. 230-256 ◽  
Author(s):  
Carla Tsampiras

AbstractThis article focuses on the micro-narratives of two individuals whose responses to AIDS were mediated by their sexual identity, AIDS activism and the political context of South Africa during a time of transition. Their experiences were also mediated by well-established metanarratives about AIDS and ‘homosexuality’ created in the USA and the UK which were transplanted and reinforced (with local variations) into South Africa by medico-scientific and political leaders.The nascent process of writing South African AIDS histories provides the opportunity to record responses to AIDS at institutional level, reveal the connections between narratives about AIDS and those responses, and draw on the personal stories of those who were at the nexus of impersonal official responses and the personal politics of AIDS. This article records the experiences of Dennis Sifris, a physician who helped establish one of the first AIDS clinics in South Africa and emptied the dance floors, and Pierre Brouard, a clinical psychologist who was involved in early counselling, support and education initiatives for HIV-positive people, and counselled people about dying, and then about living. Their stories show how, even within government-aligned health care spaces hostile to gay men, they were able to provide support and treatment to people; benefited from international connections with other gay communities; and engaged in socially subversive activities. These oral histories thus provide otherwise hidden insights into the experiences of some gay men at the start of an epidemic that was initially almost exclusively constructed on, and about, gay men’s bodies.


2019 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Refk Selmi ◽  
Rangan Gupta ◽  
Christos Kollias ◽  
Stephanos Papadamou

Purpose Portfolio construction and diversification is a prominent challenge for investors. It reflects market agents’ behavior and response to market conditions. This paper aims to investigate the stock-bond nexus in the case of two emerging and two mature markets, India, South Africa, the UK and the USA, using long-term historical monthly data. Design/methodology/approach To address the issue at hand, copula quantile-on-quantile regression (C-QQR) is used to model the correlation structure. Although this technique is driven by copula-based quantile regression model, it retains more flexibility and delivers more robust and accurate estimates. Findings Results suggest that there is substantial heterogeneity in the bond-stock returns correlation across the countries under study point to different investors’ behavior in the four markets examined. Additionally, the findings reported herein suggest that using C-QQR in portfolio management can enable the formation of tailored response strategies, adapted to the needs and preferences of investors and traders. Originality/value To the best of the authors’ knowledge, no previous study has addressed in a comparative setting the stock-bond nexus for the four countries used here using long-term historical data that cover the periods 1920:08-2017:02, 1910:01-2017:02, 1933:01-2017:02 and 1791:09-2017:02 for India, South Africa, the UK and the USA, respectively.


Author(s):  
Ian Cummins

This chapter will examine deinstitutionalisation in Italy, the United States, and post-apartheid South Africa. In examining the different drivers and outcomes of policies in these areas, similar themes to the UK experience emerge. These include: the role of scandals in the pressure for change, the role of fiscal considerations in the development of policy, an initial period of optimism and the impact of scandals. In Italy, the work of the psychiatrist, Franco Basaglia was seen as a possible blueprint for wider reforms. Basaglia’s work became very influential amongst radicals and the anti-psychiatry movement. The USA was at the forefront of the deinstitutionalisation policy. The links between the closure of psychiatric facilities and the expansion of the use of imprisonment have been most closely examined in this context. Finally, the chapter examines the total policy failure that led to the deaths of one hundred and forty-four patients in Gauteng Province, South Africa in 2014


1997 ◽  
Vol 36 (02) ◽  
pp. 82-91
Author(s):  
Y. E. Walus ◽  
L. Hanmer ◽  
H. W. Ittmann

Abstract:This paper delineates the application of decision support systems in the healthcare arena. An overview of decision support systems in the healthcare environment in the last three to five years, mostly in the USA and the UK is provided. Some reference is made to work in South Africa. Although this report endeavours to emphasise the decision support system side, some operations research issues are also addressed. This paper is divided into several sections: decision support systems definition, techniques used, the use of operations research in specific areas of healthcare, information systems, assessment of decision support systems, in-house development, decision support in South Africa and future of decision support systems.


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