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Posts Tagged ‘Ciencia’

 

The Copernicus Sentinel-2B satellite takes us over part of the western Netherlands on 16 March, with the capital city of Amsterdam at the centre of the image.

Divided among some 90 islands, Amsterdam has more than 100 km of canals. The city lies about 2 m below sea level – in fact, around a third of the country lies below sea level, making it susceptible to floods. Rising sea waters during periods of bad weather – called storm surges – are kept under control by dams, dikes, floodgates and natural sand dunes.

While we can see the North Sea on the left, the water on the right is part of the Markermeer lake. This area was once a saltwater bay called the Zuiderzee, but was closed off by a dam in the 1930s. The bay was drained in stages and land reclaimed, including Flevoland on the right side of the image – one of the world’s largest artificial islands.

Another relatively recent addition to the Dutch landscape is the neighbourhood of IJburg comprising six artificial islands east of Amsterdam. The first residents moved in only 15 years ago.

Satellites like Sentinel-2 can help to monitor urban expansion. For example, in the upper-right corner we see what looks like an artificial island being built – but this structure is not present in satellite imagery from a year ago.

The meticulously planned landscape seen in most of the image breaks for the coastal dunes along the left. These areas are home to dozens of bird species, as well as deer, squirrels, rabbits and foxes. In one protected area, grazing animals including Highland cattle were introduced to the area.

This image is featured on the Earth from Space video programme.
Id 376891

 

Web: European Space Agency

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hyperbolic geometry

 

The researchers built a VR landscape that followed the rules of hyperbolic geometry. Here, a screengrab of one of these non-Euclidean worlds in the research group’s simulations.

Image: eleVR/Hypernom

 

Web: livescience.com

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StarViewerTeam.com

El nuevo estudio científico,  que lleva por título “Regulation of Romantic Love Feelings: Preconceptions, Strategies, and Feasibility” ( Regulación de los Sentimientos del Amor Romántico: Preconcepciones, Estrategias y Viabilidad), recientemente publicado por el equipo científico formado por Sandra J. E. Langeslag y Jan W. Van Strien, pone de relieve que los sentimientos profundos de caracter amoroso, pueden ser regulados de forma consciente por nuestro Sistema Nervioso Central, pese a que habitualmente los resultados en una primera instancia podrían hacernos pensar que existe un patrón aparente entre la mayor intensidad afectiva amorosa tras una ruptura o el aparente declive de la intensidad amorosa en las relaciones largas.

Como ponen de manifiesto los autores del estudio, los resultados muestran que existen poderosas estrategias de regulación en nuestro comportamiento consciente que nos permiten regular la intensidad del amor que sentimos desde una profundidad mucho mayor de la que “a priori” se venía pensando…

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CAVES2016 - Exploration Day 3//embedr.flickr.com/assets/client-code.js
 

An international team of six astronauts from China, Japan, USA, Spain and Russia have descended into the caves of Sardinia, Italy, to explore the depths and train for life in outer space. One of the last unexplored environments on our planet, caves offer parallels to exploring space. ESA’s underground training course “Cooperative Adventure for Valuing and Exercising human behaviour and performance Skills” – CAVES – prepares astronauts over two weeks to work safely and effectively in multicultural teams.

After a week of training, the astronauts are now descending into the caves to set up basecamp 800 m underground.

The similarities between caving and spaceflight are highlighted throughout the course. Speleologists and astronauts adopt the ‘buddy system’, and both astronaut trainers and CAVES instructors repeat the same mantras of “slow is fast,” “check your gear, and then trust it,” and “always be aware of where you are and where your buddy is.”

In every expedition, the astronauts work with seasoned instructors and explorers. “A mutual trust builds as stories and anecdotes are shared,” says mission director Loredana Bessone. “The atmosphere is always one of respect.”

CAVES focuses on multicultural approaches to leadership, following orders, teamwork and decision-making. At the end of the course the astronauts will have a better understanding of how they function in a multicultural team and what they are skilled at, as well as areas for self-improvement.

Behavioural activities are woven into the course to foster effective communication, decision-making, problem-solving, leadership and team dynamics.

“From the first activity together, the support team saw that this year’s ‘cavenauts’ would be a really tight crew,” says Loredana. “Their teamwork is an example of what an expedition in an isolated, risky and alien environment should be.”

This year’s participants are an even more international team than ever, including ESA’s Pedro Duque, NASA’s Jessica Meir and Richard Arnold, Japan’s astronaut Aki Hoshide, China’s Ye Guangfu and Russia’s Sergei Korsakov.

The cavenauts bring a broad mix of skills with their backgrounds in science, engineering, flying, military and education as well as experience and culture.

Pedro Duque comments, “It is a great privilege to take part in one of the last exploration activities remaining on Earth and to enter the underworld supervised by world-class experts.

“We will use the knowledge we gain about ourselves and the group in our next space endeavours.”

Follow the underground adventure on Twitter with via @ESA_CAVES, and on the CAVES blog where the crew have provided impressions of their first week of training.

Loredana concludes: “ESA’s CAVES course brings together spacefarers from all over the world to create the best crew. We hope to see them one day exploring other worlds with the same awe and respect we have for caves.”

 
Underground and wet//embedr.flickr.com/assets/client-code.js

Underground pool//embedr.flickr.com/assets/client-code.js

CAVES 2016 – Exploring a cave//embedr.flickr.com/assets/client-code.js
 

Text: Staff Writers

Photos: European Space Agency | Flickr

Web: Space Daily

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Splitting Colors

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The Lancet Oncology

the lancet
En lo que a transgénicos se trata, cada caso debe ser evaluado mediante el método científico, en animales y humanos, efectuando estudios aleatorizados y a doble ciego, como los utilizados por la industria farmacéutica. Los niños y mujeres embarazadas, NO deberían ingerir alimentos genéticamente modificados.

Sobre el herbicida glifosato, según The Lancet Oncology, hay “evidencia limitada” de que puede producir linfoma no-Hodgkin en seres humanos, y hay pruebas “convincentes” de que puede causar cáncer en animales de laboratorio.

The Lancet Oncology, es una de las publicaciones científicas más prestigiosas del mundo.

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