Cabecera ciencia en ingles

Oxygen, an essential element for life, accounts for 21% of the air we breathe. However, certain works are carried out in conditions where levels can be lower with fatal consequences for persons. There fore it is, according to the scientists, a safety system, fruit of a collaboration agreement between the University of Granada and the Spanish Command for Training and Army Doctrine (MADOC), whose headquarter is in this city.In order to improve the features and (...)
One more year, the scientists of the Universidad de Granada will travel to the Antarctica to puzzle out the secrets of the ice continent. The expedition, composed of the researchers of the Andalusian Institute of Geophysics and Seismic Disaster Prevention Inmaculada Serrano Bermejo and Benito Martín Martínez, will set a course tomorrow Tuesday, 6th of December, for Deception Island, where they will analyse its volcanic evolution and supervise the level of seismic activity, in order (...)
Tensioactives world production (compounds exerting the wash function in detergents) amounted to two million tons in 2001, including soap. The expectations of future growth are from three to four per cent, an increase closely connected with the world demand of detergents, which is higher and higher. In parallel with this increase, concern is growing too, as far as these products must be ecological, non-toxic, cheap and, in addition, effective. A research team of the University (...)
The great interest always aroused by activated coal in industry, both for its characteristics and its many applications, has not kept out of the technological advances that improve the quality of the products. In this sense, a research group of the Department of Inorganic Chemistry of the University of Granada works on a project subsidized by the Spanish Ministry of Environmetal Issues to obtain activated coal from polymeric waste as raw materials.Activated coal is a (...)
A research team of the University of Granada has developed a new method of water purification which has aroused the interest of several and research centres such as the Swiss Institute for Environmental Science and Technology and the US company Carole Engineers. It is a system based on the simultaneous use of ozone and activated coal, highly effective and specialized on the treatment of water for human consumption and, besides, it is faster and more (...)
The volcanic inside of Deception Antarctic Island will soon stop being one of the best kept secrets of nature. A team of scientists headed by the professor of the University of Granada Jesús Ibáñez has travelled for the eleventh consecutive year to the ice continent to design at last the three-dimensional structure of the volcano and get to know how it.The team, which returned to Antarctica last February, has already enjoyed several campaigns during which (...)
Salt crystallization is one of the main problems of world heritage. Their effects are devastating to such an extent that the can even provoke the loss of sculptural, pictorial and ornamental material. However, despite the last achievements in the field of restoration, up to now they have failed to design effective measures to fight against this problem. In order to prevent the damage caused by sulphates, chlorides and nitrates in buildings and their progressive erosion (...)
A team of scientists of the University of Granada has developed a new analysis technique that will guarantee the restoration and preservation of the oldest manuscripts of the city, relegated up to now to the lowest position. The method, developed by researchers of the departments of Painting and Analytical Chemistry in collaboration with the Institute of Materials Sciences of Seville, and the archives of the Royal Chancellery of Granada, Provincial Historic Museum of Granada and (...)
The existing difference between Tsunamis (seaquakes), large waves generated when an earthquake with epicentre occurs in the bottom of the sea; the Meteorological tide, a super-elevation of the average sea level associated with low pressures; and the Astronomical tide, owing to the gravitational attraction of the stars on the oceanic mass, which originates periodic rises and falls of the sea level, are object of study in the book Fundamentos del movimiento oscilatorio (Oscillatory movement fundamentals), a work of the professors of the University of Granada Barquerizo Azofra, Losada Rodríguez and López Rodríguez, which has just been published by the University of Granada Publishing Service.

The waves observed in any water body in contact with the atmosphere are due to forces that act on the fluid trying to deform it and are compensated for the force of gravity and the superficial tensions that try to restore the balance. The form of these waves and their energetic content depend on the magnitude of the force that originated them.

Maritime engineering
This book studies oscillatory movements, hydrodynamic fundamentals, the linear wave theory, the cinematic and dynamic characteristics of oscillatory movement, fluids and average amounts associated with oscillatory movement and wave transformation processes.

According to the authors of the text: “the study of this type of oscillations is very important as any element inside a mass of water or close to it can be subjected to its action. In the case of maritime engineering, they study, among other aspects, the effect of the different types of sea waves on beaches, building works for littoral protection, ports or off-shore structures, as they will determine their design and maintenance”.

The authors of Fundamentos del movimiento oscilatorio (Oscillatory movement fundamentals) say that swell is the fundamental agent to consider in the design of any maritime construction work.

Wind is the generator mechanism of swell: waves originate in the open sea when the velocity of wind goes beyond certain critical level. From this moment, waves of small length and period and different directions start to form, fundamentally characterized by their asymmetry, giving a chaotic appearance to the open surface of the sea.

According to the authors of this book, “under the continuous action of wind, waves grow in height, length and period reaching maximum levels depending on the velocity of the wind, the length of the area over which it blows out or «Fetch», how long it has been blowing and water’s depth. In this case it is called fully developed sea, in other case it is known as partially developed sea”.

When swell has left the generation area, the components of different periods are segregated due to their dispersive nature. Long-period waves travel faster and are characterized by a higher symmetry and look more ordered. They look quite similar to sinusoidal waves. This surge is known as bottom sea or swell.

According to the authors of the text “when they propagate to more reduced depths, a moment comes when swell starts to feel the bottom: the waves are cambered, the height of the crests increases, the sinus wave decreases and the horizontal axe starts to lose symmetry. This phenomenon, called shoaling, is more marked in that the wave propagates to less deep waters”.
Reference
Professor Asunción Barquerizo Azofra. Dpt. Civil Engineering. Phone numbers: 958 24 8315. 958 248954
E-mail: abaqueri@ugr.es.
Professor Miguel Ángel Losada Rodríguez. Dpt. Civil Engineering. Tlfs. 958 24 8316. 958 246136. E-mail: mlosada@ugr.es (...)
Although their voice is imperceptible, even stones scream when they are damaged. They emit an ultrasound that reveals the state of health of the building or construction they support and they can even tell where the damage is and what can happen in future if we do not deal with the problem.A research team of the University School of Technical Architecture of the University of Granada, supervised by professor Antolino Gallego Molina is in charge (...)
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