Bulk ultrafine grained (UFG)/nanocrystal metals possess exceptional strength but normally poor ductility and thermal stability, which hinder their practical applications especially in high-temperature environments. Through microalloying strategy that enables the control of grains and precipitations in nanostructured regime, here we design and successfully produce a highly microstructure-stable ...

Studies have shown that the variability of precipitation depends primarily of climatic factors, wind, temperature, and atmospheric pressure, however in the past twenty years the continuous eruptive process of volcano Tungurahua has been a natural factor that contributed to the variability of precipitations in short term and to the extension of the watershed of Ambato River. To incorporate the e...

The combination of mountain landforms and heavy precipitations generates favorable conditions for landslides, which play an important role in nature, with effects on ecosystem function diversity. Gastropods, due to their abundance, diversity, sensitivity environmental factors low dispersibility, are excellent organisms study the natural anthropogenic perturbations. objectives this were conduct ...

Sudden precipitations may bring troubles or even huge harm to people's daily lives. Hence a timely and accurate precipitation nowcasting is expected be an indispensable part of our modern life. Traditionally, the rainfall intensity estimation from weather radar based on relationship between reflectivity factor (Z) rate (R), which typically estimated by location-dependent experiential formula ar...

Micro-alloyed High Strength Low Alloy steels (HSLA-steels) are widely used in civil construction, automobile and line pipe applications. They contain small quantities of alloying elements between 0,01 – 0,1 wt%, such as Niobium, Titanium, Vanadium, Aluminium and Nitrogen. These steels rely on thermo-mechanical rolling, a technique that simultaneously provides high strength, excellent toughness ...

Ecohydrology in Mediterranean areas: a numerical model to describe growing seasons out of phase with precipitations D. Pumo, F. Viola, and L. V. Noto Dipartimento di Ingegneria Idraulica ed Applicazioni Ambientali, University of Palermo, Viale delle Scienze, 90128 – Palermo, Italy Received: 3 August 2007 – Accepted: 20 August 2007 – Published: 4 September 2007 Correspondence to: D. Pumo (pumo@i...

The alloantigen Qa-2, whose gene is located on the 17th chromosome between H-2D and Tla, is identified as a molecule of 43,000 daltons which is associated with beta 2-microglobulin. Qa-2 comprises approximately 0.15% of the iodinateable cell surface protein of lymph node cells. Sequential precipitations demonstrated that Qa-2 is distinct from H-2D and H-2K molecules.