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Digital maps, the so-called geographic information systems (GIS), are intended to gather information from multiple databases and use it to track and predict outbreaks of disease.

This can be used to assist developing countries to better utilize its limited resources. For example, GIS is used to organize data on groups of diseases and the availability of drinking water.

“Roads, power lines and buildings can be digitized, you can also get information about the characteristics of buildings, whether residential, commercial,” Max Baber from the University of California in Redlands, is a leading GIS project in Rwanda, Li World Service Bi-Bi – Si programme Digital Planet.

“Once things in a certain place, you can begin to explore the spatial relationships between them.”

Gathering information

By putting this information together with a map can be found correlations between things that can not be apparent for charts and tables.

The information gathered in Rwanda, for instance, shows not only the health situation, but also electricity and water supply in general. The number of newly reported cases of such diseases as malaria, have occurred in various parts of the country.

Layers on the interactive map can be used in respect of certain medical services and supplies are most needed, for example.

“If you start collecting data and link it in its place, then you can see the relationship between things such as access to dirty water and polluted water affects the health of these places,” added Mr. Baber.

The system can health workers in Rwanda, track the number of malaria cases in each medical center. One point on the map at the center of each hospital seems more or less depending on the number of cases.

“You can look at the view, where important cases, where malaria is increasing or decreasing, where people have the highest risk,” Nicole Ubashaea, which uses the GIS system in his office in the center for geographic information systems in Butare, he said.

“You have no table and overlapping of print maps and compare all.”

Data intensive

GIS also has many other applications – from development of the energy needs of the city, the effects of heavy industry on the environment or the impact of deforestation on carbon dioxide emissions.

The main task is to gather enough information to a reliable database.

But the result could have far-reaching implications for public policy and the optimum use of time and money

“Politicians, like everyone else receive the value of information provided to them”, said Mr. Baber.

“We represent a clear idea about them, if they are on the map.

“You can talk all you want, but as soon as maps that clearly show that the relationship involved and help the Government of Rwanda to effectively manage its resources.”

adapted from http://news.bbc.co.uk

In an attempt to assess exactly how light affects our body clock, Rensselaer Polytechnic Institute Lighting Research Centre (LRC) in Troy, New York, has developed a device called a “Daysimeter. Lesser and mounted in the ears, as mobile wireless headphones, consists of three sensors to monitor the movement of the head, bright light (or suites, measuring radiation in the day-Vision), and blue visible light (also known as the circadian light). circadian light emitted from the sun, as well as computer and television screens to help some balance of neurotransmitters and hormones in the body, but only in certain doses and at certain times of the day. Too many in this light can be outside the body internal clock, researchers believe will lead to problems such as fatigue and illness.

Researchers in the LRC, in cooperation with Yale and Brown universities, last month began testing device 24 students from Brown whether a person can alter circadian rhythm. Subjects were instructed to use a wireless tool along their daily lives.

“Our idea is to Daysimeter, together with other biomarkers [as hormones] will allow us to obtain a more detailed analysis of circadian profile specific person,” said LRC Director Mark Rea, Rensselaer professor of cognitive science. Explorers, the effect of circadian illumination level of hormones in blood samples from the patient. “We fully expect that we can see the difference in population,” he said.

Rea expected “real-time lighting recipes” to help people avoid them or light at the appropriate time. Simple measures to control when and how the circadian light Nightshift we could help workers stay alert at work during the day and sleep better and helps cure jet lag, depression is reduced, and generally support all the good night sleep.

The ability to alter circadian rhythm may be adverse health effects that some researchers believe that they are violations of light-dark cycle. Recent studies have shown the link between health and changes in the natural circadian rhythm. Journal of National Cancer Institute published a series of articles, for example, showed that night shift workers had higher incidence of breast cancer and, last year, the World Health Organization, the International Agency for Research on Cancer night work as a possible breast cancer risk factors .

“Light is the most important signal that the environment tells your body what time of day,” said Steven Lockley, assistant professor of medicine at Harvard Medical School Division of Sleep Medicine, Brigham and Women’s Hospital in Boston. With the advent of electricity, exposure to artificial lighting at night, causes changes in normal light-dark cycle and disrupt the body’s circadian rhythm. “If you use artificial light at a time when external light Ido se ha night,” said Lockley “, and then began to confuse our body clocks.”

Measuring and changing circadian rhythm in the bass such discoveries made in recent years. In 2001, George “Bud” Brainard, professor of neurology at Thomas Jefferson University in Philadelphia, refers to the wavelength of light and circadian Josephine Arendt, the founder of the University of Surrey Chronobiology Center in Guildford, England found that the circadian light in the eyes of detection photo different receptors that this vision optics. In 2002, Brown University neurology professor David Berson and Ignacio Provencio biologist at the University of Virginia Melanopsin identified, can be found in the retina-ganglion light-sensitive nerve cells, such as circadian photoreceptor light. Lockley found that the photo receptors are also working in a “blind people.

Rea admits LRC is not made him an instrument to the public. But researchers in the field of science circadian rhythm very excited about the possibility of devices that one day people helping their own light and dark cycle to keep it in balance.

adapted from http://www.sciam.com/

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