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Pedro J. Hdez
Attended University of Manchester
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Pedro J. Hdez

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Two thirds of the world's population face severe water shortages, even more than previously thought. In China and India, alone, about two billion people are consuming twice the water available in their area at least once a year.
The scarcity can lead to crop failure and low crop yields, which could cause food price increases, famine and widespread starvation.
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Pedro J. Hdez

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Why the "duck curve" created by solar power is a problem for utilities

"From the grid operator's point of view, solar energy doesn't look like a power plant at all (those are controllable, or "dispatchable," in the jargon), it looks like a reduction in demand. It's a reduction in demand for the power supplied by the grid operator's power plants — a somewhat predictable reduction, but not a controllable one."
The rise of rooftop solar panels has the grid quacking. (Quacking! Get it?!)
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Nueva entrada en el blog de climatologia: modelo idealizado de efecto invernadero.
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El hecho de que la temperatura media en las inmediaciones de la superficie terrestre (15ºC) esté unos 33ºC por encima de la temperatura de equilibrio radiativo (-18ºC) de sigue clamando por una exp...
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Pedro J. Hdez

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Do animals feel empathy? Inside the decades-long quest for an answer.
Inside the decades-long quest to prove animals have empathy.
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In a new study, scientists have proposed that tiny residual effects measured by ether-drift experiments in the 1920s and '30s may be the first evidence of a temperature gradient that was theorized in the 1970s, but never before detected in a laboratory. The theorized temperature gradient is thought to be caused by the solar system moving at 370 km/sec through the cosmic background radiation (CBR), which is the faint electromagnetic radiation that fills the universe.
 
Could 80-year-old ether experiments have detected a cosmological temperature gradient?
(Phys.org)—In a new study, scientists have proposed that tiny residual effects measured by ether-drift experiments in the 1920s and '30s may be the first evidence of a temperature gradient that was theorized in the 1970s, but never before detected in a laboratory. The theorized temperature gradient is thought to be caused by the solar system moving at 370 km/sec through the cosmic background radiation (CBR), which is the faint electromagnetic rad...
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Humans in Europe first experienced a “bottleneck” when their numbers decreased during the last Glacial Maximum roughly 25,000 to 19,500 years ago, says the new research, published Thursday in Current Biology. But later, as a warm period kicked in around 14,500 years ago, it looks like this population was replaced or overwhelmed by a genetically somewhat different one, which may have been able to migrate into the area, thanks to retreating ice.
Humans in Europe first experienced a "bottleneck" when their numbers decreased.
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"The catastrophic release of fresh water from a vast south American lake at the end of the last Ice Age was significant enough to change circulation in the Pacific Ocean according to new research. The study reveals that the lake, which was about one third the size of Wales, drained several times between 13,000 and 8,000 years ago, with devastating consequences".
 
"The catastrophic release of fresh water from a vast south American lake at the end of the last Ice Age was significant enough to change circulation in the Pacific Ocean according to new research. The study reveals that the lake, which was about one third the size of Wales, drained several times between 13,000 and 8,000 years ago, with devastating consequences".

(Posted by +rasha kamel​)
The catastrophic release of fresh water from a vast south American lake at the end of the last Ice Age was significant enough to change circulation in the Pacific Ocean according to new research. The study reveals that the lake, which was about one third the size of Wales, drained several times between 13,000 and 8,000 years ago, with devastating consequences.
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If LIGO has indeed directly discovered gravitational waves, that’s exciting of course. But it’s by no means the most important story here. That’s because gravitational waves were already observed indirectly, quite some time ago, in a system of two neutron stars orbiting each other.
Scarcely a hundred years after Einstein revealed the equations for his theory of gravity (``General Relativity'') on November 25th, 1915, the world today awaits an announcement from the LIGO experi...
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Women are underrepresented in key disciplines for the study of climate change. For example, women are a minority in the earth sciences where surveys reveal that less than 20% of meteorologists and geoscientists are women. A recent analysis of US atmospheric science doctoral programs reveals that women were 17% of tenure track and tenured faculty, with even smaller proportions at higher rank, and 53% of departments had two or fewer women faculty.
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Excelente curso de climatología básica en Coursera
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Volumen cerebral en niños y pobreza. Las áreas más afectadas son el hipocampo y el lóbulo frontal (memoria por un lado, toma de decisiones y autocontrol por otro).
SES - nivel socioeconómico, alto, medio y bajo
Dos papers, la imagen es del segundo.
http://www.pnas.org/content/112/51/15530.full#ref-11
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3859472/

Vía +Antonio Jose Osuna Mascaró 
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Si España está en el top ten mundial en producción científica y en el puesto 22 en el número de patentes, ¿no será la industria la que está fallando en este país?

Fuente: http://www.scientificamerican.com/article/the-worlds-best-countries-science/
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Education
  • University of Manchester
    MSc, 1992 - 1993
  • ULL
    Física/Astrofísica, 1986 - 1991
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Nunca atribuyo a una conspiración aquello que pueda explicarse por simple incompetencia
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Colaborador de naukas.com
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Profesor de tecnología en Secundaria
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