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 article describes how a network of sensors, linked by software and the Internet, can provide an automatic satellite-based surveillance system for disasters such as volcanoes, wildfires and flooding.

The system, or 'Sensorweb', uses data from low resolution, high frequency sensors to trigger imagery from high resolution instruments. The low-resolution data is collected regularly (twice a day or more) from instruments such as NASA's Moderate Resolution Imaging Spectroradiometer (MODIS).

Anomalies, such as hotspots in the case of fires and volcanoes or surface water for floods, are automatically detected. The SensorWeb then sends a request to a higher resolution satellite such as Hyperion, which is very sensitive in the infrared spectrum, to request data over the area of interest. These data can then provide disaster managers with early warnings of adverse events.

This article, written by Chris Funk of the US GS, outlines how the Famine Early Warning Systems Network (FEWS NET) uses satellite data and statistical forecasts to provide early warnings of potential droughts in sub-Saharan Africa.

Funk outlines the role of satellite data in FEWS NET at all stages of the crop-growing season — from scenario building before the season to calculating the water balance during it and assessing yields at the end. Focusing on food security outlooks for East Africa in late 2008, Funk describes how data from NASA's Aqua and QuikSCAT satellites can be used to track moisture and wind conditions over the Indian Ocean and Africa, and how these help anticipate hydrologic conditions in the future to predict shortfalls.

Funk emphasises the need to combine such data with socio-economic analyses of, for example, crop prices, grain stores, political conditions and agricultural inputs. This will help maximise the accuracy and effectiveness of early warnings of drought and food shortages.

This policy brief, prepared by the Africa Progress Panel, African Development Bank and UN, outlines the implications of climate change for Africa, emphasising the need for a strong and cohesive negotiating position at the December 2009 climate talks in Copenhagen.

The authors argue that African governments must define practical steps for the international community to address the climate crisis. Three areas require urgent action: clear emissions targets and an adaptation fund; energy-saving technologies through additional financing and technology transfer; and improving long-term frameworks such as the Clean Development Mechanism and reduced emissions from deforestation and forest degradation (REDD).

To achieve this, argue the authors, African heads of state and ministers of finance, planning and environment must collaborate on a practical strategy position to generate maximum buy-in from the rest of the world. This must be achieved in time for high-level meetings in the second half of 2009.

This report from GeneWatch UK describes the use of genetically modified (GM) crops as agrofuels and makes policy recommendations on their use.

Civil society groups have raised concerns over the sustainability of using food supplies to produce biofuel. Industry and government have responded by investing in genetically modified 'second generation' biofuels to try and increase energy output from a broader range of plant sources.

The author says that assessments of GM biofuels must consider their impact on biodiversity, food supply and land use, how much they can realistically reduce carbon emissions and their technical feasibility.

GeneWatch UK recommends an independent appraisal for second-generation GM agrofuels. It suggests that gaps in research and regulation must be addressed, particularly those regarding environmental concerns such as factory waste streams containing GM organisms.

This report, written for the Meridian Institute by a team of scientists from South Africa and Sri Lanka, describes the general issues facing projects aimed at improving access to clean water in the developing world, as well as the specific challenges facing nano-based projects.

The authors describe a number of water treatment devices that incorporate nanotechnology, including nanofiltration membranes, attapulgite clays and zeolites, nanocatalysts, magnetic nanoparticles and nanosensors. More importantly, they outline potential opportunities associated with these technologies, and possible risks.

The paper includes two case studies of projects designed to improve access to clean water — one in Bangladesh based on a conventional approach using sari cloth to remove cholera from water, and one in South Africa that incorporates a nanofiltration membrane.

This commentary, by South African scientists Thembela Hillie and Mbhuti Hlophe, examines nanoscience's potential to solve the technical challenges associated with removing pollutants from water. The authors describe a range of nano-based water treatment technologies already in the marketplace and discuss how nanofiltration membranes can be used in low-cost methods to produce safe drinking water. They highlight a case study in South Africa where such membranes were used to treat brackish groundwater.

The authors emphasise the importance of technology transfer in getting nano-based solutions to the countries that need them, arguing that direct transfer does not often work. Rather, what developing countries need are approaches that combine technology transfer with technology adaptation and adoption — involving local stakeholders in establishing water treatment devices and developing local capacity to use them.

This World Bank report examines higher education in Sub-Saharan Africa, asking how it can stimulate economic growth in the region. Drawing on international experience and regional case studies, the authors argue that there is an urgent need for countries in Sub-Saharan Africa to invest in human capital and knowledge — and therefore higher education — to create a viable and growth-promoting industrial system, and cope with threats such as disease, population growth and climate change.

They discuss how and why human capital investment can lead to socioeconomic growth and review current practices in Sub-Saharan Africa. The authors propose a number of good practices to help countries in the region strengthen their higher education systems quickly and effectively.

Recommendations include developing a national strategy for developing human resources, reforming funding mechanisms for higher education, giving institutions decision-making powers, encouraging diversity and developing postgraduate programs to boost local research capacity.

This paper from the Association of Commonwealth Universities outlines the commitments and activities made by major international partners — specifically the G8 countries — to developing African higher education between 2000 and 2004.

Projects are analysed by topic — from human resources development to HIV/AIDS to science and technology — and region. The authors highlight trends in donors' strategies for supporting African higher education, presenting development portfolios and case studies from France, Germany, Scandinavia, the United Kingdom and the United States, among others. They suggest improvements in aid delivery, including collaboration between donors and increased communication about individual donor strategies. They also call for more networking and collaboration across higher education institutions within Africa, while noting that these face financial constraints.

The authors conclude that there is a particular need for donors to provide more support to science and technology projects — as a crucial driver of socioeconomic development.

This paper examines the relative costs of research in South Africa and the apparent disparity in researchers' salaries. A 2004–2005 research and development survey provides data on the unit cost of research across higher education institutions (HEIs), science councils and the business sector. Analysis shows that research costs and salaries are highest in the business sector and lowest in HEIs, although the differences are not as wide as expected. Similarly, overhead costs are lowest in HEIs and highest in the business sector.

But the authors emphasise that while HEIs may provide the cheapest research — based on cost per hour — this does not mean that they necessarily provide the cheapest 'cost per deliverable', i.e. value to the client.

The authors call for more regular and detailed data to better understand the researcher labour market. They propose an annual salary survey focused on public sector researchers and a common pricing model for all institutions performing public research.

This discussion paper, published by the International Food Policy Research Centre, examines the potential for mitigating climate change through carbon trading, with particular emphasis on Sub-Saharan Africa.

The authors provide an overview of global carbon markets, highlighting Africa's share in these, while outlining the obstacles African nations face in participating. They also assess mitigation opportunities in agriculture, land use and forestry in the region.

They conclude that Sub-Saharan Africa has much potential for mitigating emissions through forestry and cropland management, but action is constrained by existing capacity, funds, property rights and the price of CO₂ equivalents. They also suggest that integrating the region into global carbon markets will require new international capacity-building and advisory services, simpler rules for participating in the Clean Development Mechanism, access to emission allowances and credits, and more involvement in voluntary markets.

This report, published by the UNEP World Conservation Monitoring Centre, highlights areas where high carbon content and high biodiversity overlap. The authors argue that by identifying target areas, such spatial analyses can help tropical countries reduce greenhouse gas emissions from land-use change while maximizing biodiversity benefits.

Regional maps of tropical Africa, tropical Asia and the Neotropics give overviews of carbon stocks and biodiversity values. National-scale maps covering Panama, Vietnam and Zambia show more detailed data on carbon storage and on the species richness of mammals, birds and amphibians.

The maps highlight protected areas of tropical Asia, which suffer the highest percentage of forest loss. The authors suggest that although mapping can help in conservation planning, it must be accompanied by effective management on the ground and monitoring of land-use change to effectively reduce emissions. It is also important to account for national priorities and country-specific pressures.

This paper, written by an international team of researchers, documents the work of the African AIDS Vaccine Programme (AAVP). It highlights the programme's impacts, successes and challenges, and looks to where the AAVP is heading.

The AAVP, supported by the WHO and UNAIDS, is a network of African HIV vaccine stakeholders that promotes a coordinated approach to developing HIV vaccines and making them available on the continent. It operates through collaborative centres located at key institutions across Africa.

Programme members work on crucial issues including regulation; ethics, laws and human rights in clinical trials; biomedical research; country-based strategic planning; and communication and media.

The authors outline the AAVP's achievements to date, highlighting its success in expanding training and infrastructure specific to HIV vaccine development. They suggest that AAVP could offer a way for African stakeholders to influence the global agenda for HIV vaccine research and development.

Cardiovascular disease accounts for 30% of deaths worldwide and 10% of all years of healthy life lost to disease, and the figures are nearly as high in developing countries — 27 per cent and 9 per cent respectively. This compares with 10% of lives lost worldwide from HIV/AIDS, TB and malaria put together (12% in developing countries). So why have donors not invested as heavily into tackling non-communicable chronic diseases as they have with infectious ones? The authors of this article suggest several reasons: infectious diseases are in some ways easier to solve by a vaccine or drugs so it might seem sensible to use precious funding this way; Western donors may want to see epidemics contained quickly to avoid global spread; pictures of small African children dying of AIDS are more heartrending than a middle-aged man with hypertension, even if that man is supporting a large family; there is a myth that chronic diseases are more costly to prevent than infectious ones. This last issue is one that should be tackled strongly to spread awareness that low-cost methods can have an enormous effect on chronic diseases.

Vaccination for infectious diseases is a vital method of prophylaxis, and has transformed modern medicine. By contrast, research into vaccines against chronic diseases has been less successful, in part because of the increased complexity involved.

In this opinion piece, the authors outline the prospects for the development of chronic disease vaccines. These might not need to rely on the traditional method of inducing the body to produce antibodies, but rather on introducing monoclonal antibodies against specific proteins — this has so far worked well against Crohn's disease and rheumatoid arthritis.

The authors outline key hurdles in developing a successful therapeutic vaccine. Safety and efficacy are two obvious ones, but there is a third that is unique to vaccines for chronic diseases. Because these vaccines would block bodily chemicals — such as cytokines or hormones — it would not be acceptable for a vaccine to induce a life-long block (unlike a malaria vaccine, for example, where a lifelong block would be ideal).

These might be particularly useful in developing countries, say the authors. Because prophylaxis with vaccines is already a familiar concept, there should be no problem with patients' compliance, and judicious partnerships between public and private organisations could mean the vaccines are produced cheaply.

The Millennium Development Goals (MDGs) practically define health efforts in the 21st century, but they virtually ignore non-communicable diseases such as mental health, say these authors. This is despite evidence that mental health disorders are among the most important cause of sickness and disability and even premature mortality. The authors argue that tackling mental health problems will be vital to achieving the MDGs, and three in particular — eradicating poverty, reducing child mortality, and improving maternal health.

Poverty and hunger are well-recognised risk factors for mental health, but mental health also makes it harder for people to escape the hunger trap. Mothers who are depressed during pregnancy and post natally, are more likely to have underweight babies; not only that, the illness means these mothers are more likely to stop breastfeeding and less likely to ensure their children are properly immunised than mothers without depression.

The authors advocate that strengthening basic health-care systems should be holistic. For example, developing countries need more and better-trained health workers but they should not only know how to deliver babies but also how to counsel new mothers. HIV/AIDS programmes, as another example, should ensure that individuals not only have good access to antiretrovirals but also to treatment for depression if they need it.

Schizophrenia is relatively rare — affecting 1% of the world's population — but is arguably one of the most severe mental illnesses. Diagnosing and treating it can be hard enough in developed countries; the challenges are magnified in developing nations with inadequate health systems; few trained staff; and pervasive social stigma. So how best to treat it? In this debate, three psychiatrists offer their different viewpoints.

Vikram Patel, at the London School of Hygiene and Tropical Medicine, says the shortage of mental health specialists means that the most effective way of spreading the expertise around might be for non-specialist health workers or community representatives to be trained to bear the brunt of providing first-line mental health services. Saeed Farooq, at Pakistan's Lady Reading Hospital, argues that the principles of the WHO's DOTS TB programme, in which patients are given an uninterrupted supply of medication taken under close supervision, could be used to treat schizophrenia. The rationale is that missing medication for schizophrenia, which can be common given the cognitive impairment associated with the illness, has serious consequences and can lead to much higher risks of relapse. R. Thara, director of the Schizophrenia Research Foundation, Chennai, India, advocates tackling stigma by offering proper treatment. In India at least, he says, the mystification of mental illness is intensified by a lack of awareness about schizophrenia and also by "magico-religious" beliefs. Effective treatment that shows the symptoms to be an illness rather than a religious curse is the best antidote to stigma, he says.

In 2005, the World Health Assembly called on WHO member states to tackle their growing rates of cancer by developing rigorous cancer control programmes. To help guide the process, the WHO developed a series of six modules that provide practical advice for programme managers and policy-makers on how to advocate, plan and implement effective cancer control programmes, particularly in developing countries.

Individual modules focus on planning; prevention; early detection; diagnosis and treatment; palliative care; and policy and advocacy. As of May 2008, all but the one on policy and advocacy have been published.

Worldwide, cancer kills more people than HIV/AIDS, malaria and TB put together. In developing countries where chronic diseases are now growing alongside infectious diseases, new strategies need to be developed.

This article outlines how to develop an effective cancer strategy in African countries on the basis of discussions at the recent African Cancer Reform convention. A cancer control plan clearly needs to take into account African countries' financial constraints and the authors outline six key essentials that would offer most health gain for money invested. These are: setting up cancer intelligence units to collect data on cancer incidence; controlling tobacco use; early diagnosis and prevention; offering treatment wherever possible; palliative care when treatment is no longer useful; and training and educating future generations of African oncologists.

Developed countries can offer crucial expertise and experience and collaborate on cancer information networks. Educating local communities about a disease that is relatively new but growing quickly will also be essential to stop it spiralling when many cancers are preventable or treatable when detected early enough.

In 2003, the Gates foundation infused new vigour into global health efforts by declaring that the 21st century's "grand challenges" included developing new vaccines and overcoming drug resistance. This new grand challenges initiative, launched by a collaboration of top global chronic disease experts, identifies priorities in tackling diseases like diabetes and cardiovascular disease, and explains in detail how research should be directed to meet each challenge (a challenge was defined as a critical barrier that if removed would help solve an important health problem).

To distill the range of opinions and priorities, the coordinators sought input from 155 stakeholders from different countries and disciplines. The initiative requires the participation of agencies like the WHO, individual governments, and non-governmental organisations as well as civil society and business if it is to succeed. The authors point out that the Gates initiative was linked to large funding, whereas this project will rely on multiple funding agencies to coordinate on these priorities.