SciDev.Net

This report, prepared for the UN Economic Commission for Africa, reviews the status and prospects for remote sensing in Africa.

The authors argue that a real and immediate need exists for real-time remote sensing data to improve early warning, vulnerability assessment, mitigation, response and relief of disasters. This means, they say, supporting African countries to acquire data — including launching their own satellites, as well as improving bandwidth infrastructure and building capacity for analysing and processing geoinformation.

The authors highlight the continent's limited connectivity as a particularly challenging hurdle to overcome, as well as a lack of training and expertise in remote sensing. They briefly outline international donors' efforts to improve the situation and suggest improving collaboration and networking.

This report, written by solid-Earth scientists at NASA's Jet Propulsion Laboratory, sets out the requirements for delivering high-accuracy, high-resolution surface deformation data for earthquake studies.

The authors build on recommendations made by NASA's Solid Earth Science Working Group. They propose a constellation of satellites for interferometric synthetic aperture radar (InSAR) — a technique based on combining two or more radar images in a way that can measure ground motion on a centimetre scale.

A constellation of InSAR satellites could provide earthquake prediction data, suggest the authors. The GESS report defines a 20-year roadmap for earthquake forecasting and outlines the measurement requirements, as defined by scientists and disaster managers.

This report, prepared by the Committee on Earth Observation Satellites (CEOS), presents the main capabilities of satellite systems and their applications to detect, monitor and adapt to climate change, alongside plans for future relevant satellite missions.

The report is divided into three parts. The first discusses the Earth's changing climate, emphasising the role of satellite imagery in monitoring this. The second presents a number of case studies to illustrate how earth observing satellites provide data to improve our understanding of climate change, including charting sea-level rise to better cope with flooding.

The final part summarises satellite capabilities with a description of the different satellite missions and instruments as well as their applications, such as to improve weather forecasting or provide damage assessment associated with natural disasters.

This paper from the Meridian Institute describes a range of well-known and field-tested conventional approaches to removing contaminants from water as well as the current crop of nanotechnologies that could enhance existing — or develop new — water treatment technologies.

For each approach or potential product the authors give a short description of what it is and who has developed it, and report on the product's effectiveness in removing contaminants, the amount of water it can treat, and its cost and ease of use. They also include summary comparative charts of conventional versus nano-based treatments.

Conventional approaches covered include various types of filters, ultraviolet radiation, chemical treatment and desalination. Nano-based water treatments covered include carbon nanotube-based technologies, nanofiltration membranes and devices, nanoporous materials and clays, zeolites, nanocatalysts and magnetic nanoparticles.

This report, prepared by the World Water Assessment Programme under UNESCO (UN Educational, Scientific and Cultural Organization), assesses global freshwater resources including what drives the pressures facing them, how water is used, climate change's future effects on water supplies and options for improving water management for sustainable development.

The authors highlight the increasing demand for water, outlining the demographic, economic and social factors — such as population growth, international trade and changing lifestyles. They argue that climate change will undoubtedly affect water resources, impacting water quality and the frequency of extreme events such as droughts or flooding.

Investment in the water sector is important, say the authors — to improve access to clean water as well as decrease pollution from untreated sewage discharge. International donors must play a part in improving water infrastructure in the developing world, they add.

But how individual countries respond will depend on their own development objectives, capacity and political framework. The authors outline options for policymakers to increase supply, manage demand, reduce losses and reallocate resources.

This report, published by the Project on Emerging Technologies at the Woodrow Wilson International Center for Scholars, looks at social and ethical issues of emerging technologies, with a focus on nanotechnologies.

The author examines social context issues such as unequal access to health care, morally controversial practices such as synthetic biology, the emergence of technoculture, and life issues.

He discusses three common misconceptions; that it is too soon to understand the ethical implications of new technologies; that raising ethical issues hinders technological and social progress; and that the sole purpose of ethical and social research is to secure public acceptance.

The author concludes that ethical considerations can anticipate and proactively address any negative aspects.

This report, published by the Meridian Institute describes the growing interest that developing countries, including Brazil, China, India and South Africa are showing for nanotechnology. It describes the ways in which nanotechnology applications could solve problems of health, sanitation, and pollution and provide faster, cheaper information and communication technologies.

The report also reviews the challenges of using nanotechnology for and in developing nations. Finally, it outlines the roles and responsibilities of different stakeholders in ensuring that nanotechnology moves forward responsibly.

The Meridian Institute says nanotechnology could play a role in achieving the UN Millennium Development Goals — a set of quantified development objectives to be achieved by 2015. As a result, governments of rich nations should dedicate a "reasonable" portion of their overseas development assistance to nanotechnology.

To access the report, users must create a free login name and password.

This report by the UK Government-funded Economic and Social Research Council presents an overview of nanotechnology and its commercial applications, from cosmetics to the defence industry. It features a chapter on the debate between those who claim that nanotechnology will have a positive impact on society and those who consider it dangerous. A useful literature summary in the second appendix briefly describes the contents of 25 key documents published in the field of nanotechnology in recent years.

The insurance industry trades in risk, and therefore has a vested interest in assessing the risks connected to emerging technologies. This report presents an overview by the leading insurance company Swiss Re. It assesses the range of risks to human health and the environment posed by nanotechnology and the implications for insurance.

The report says that the unknown risks of toxicity and pollution associated with nanotechnology are unacceptable. Swiss Re is concerned nanotechnology may follow the same route as asbestos, a product that was used chiefly in construction materials for many years, posing great risks to human health and the environment, before the real scale of its toxicity was revealed.

The report's appendices summarise potential applications for nanotechnology in the fields of information technology, medicine, pharmaceuticals and energy processing. The full text of the report is only available in pdf format.