Buscar recursos académicos

This study presents pioneering research addressing the challenge of surrounding rock control in gob-side entry retaining by roof cutting under the conditions of a gently inclined coal seam with an extra-thick main roof r...

Abstract Active tectonics and coastal deformation predispose continental margins to submarine gravitational instability and canyon head retreat. Here we investigate the drivers of this susceptibility along the Italian co...

The tectonically active broken foreland of NW Argentina is a recent analog of the eastern margin of the Puna plateau during Mio-Pliocene times and likely of other broken forelands worldwide. In order to evaluate active t...

The western Gondwana margin underwent a complex geodynamic history during the early Paleozoic, and major uncertainties remain as to the role of tectonism in sedimentary dynamics. This study focuses on the lower part Sant...

In this paper we study of the characteristics of  the  isomeric state of  ( ) isotones with  and the reduced electric quadrupole transition probability in unit of  Weisskopf  and calculate these values  in unit of...

Abstract The spherical plain bearing test bench is a necessary detecting equipment in the research process of self-lubricating spherical plain bearings. The varying environmental temperatures cause the thermal deformatio...

Topological charges of nodal lines in a multigap system are represented by non-Abelian numbers, and the Euler class, a topological invariant, can be used to explain their topological phase transitions, such as pair-annih...

The settlement of subway tunnel due to the rail load after its construction has cause wide concern. But the report of dynamic characteristics of railroad considering uneven settlement has not been reported. Based on a su...

The existing field measurements show that the deformation of retaining wall and surrounding environment induced by pre-excavation dewatering can reach centimeter level, but the relevant researches are still less. The beh...

The anchor technology in China's standards has some room for improvement compared with the foreign ones. Based on the latest standards of European Union, USA and Japan, some suggestions are put forward: (1) An anchor str...

The Nature of Viscoelastic Behavior. Illustrations of Viscoelastic Behavior of Polymeric Systems. Exact Interrelations among the Viscoelastic Functions. Approximate Interrelations among the Linear Viscoelastic Functions....

La utilización de métodos morfométricos se constituyó a lo largo del siglo XX en una de las aproximaciones más empleadas en el campo de la antropología biológica. Junto con el gran desarrollo alcanzado por la mism...

Se estudió la estructura de la poblaci6n prehistórica del sector septentrional del noroeste argentino mediante el empleo de caracteres no-métricos del cráneo. La muestra está constituida por 673 individuos perteneci...

En el presente trabajo se analiza la estructura de la población prehistórica de la Quebrada de Humahuaca. La muestra empleada está constituida por 356 individuos (de edades postreproductivas, de ambos sexos, deformado...

The objective of this research is to develop a tool for the generation of 3D objects modeled with flexible materials, with visco-elastic or inelastic characteristics, similar to the plasticine. It is desirable to priorit...

La práctica de la deformación artificial del cráneo fue un fenómeno ampliamente extendido durante tiempos prehistóricos en varias regiones del mundo. El empleo de la información morfométrica craneofacial en el est...

Se realizó un estudio métrico con 126 cráneos de Patagonia -38 no deformados (PN), 40 con deformación tabular erecta (PD) y 48 indeterminados (PI)- para evaluar si la deformación artificial produce diferencias crane...

Varios autores han verificado la existencia de asociaciones significativas entre algunos rasgos no métricos y factores como el sexo, la edad y la deformación craneana artificial en diversas poblaciones. El objeto de es...

Se presenta una síntesis de una serie de experiencias realizadas con el fin de analizar el efecto del dimorfismo sexual, la variación etaria, la deformación artificial y la variación cronológica sobre la morfología...

The Guañacos fold and thrust belt, located between 37° and 38° S in the eastern foothills of the Main Andes is characterized at its eastern border by a series of NE, NW and N- neotectonic faults associated with the An...

El quiste de córnea es una enfermedad corneal de baja frecuencia en caninos. Una canino, mestizo, macho se 12 años fue presentado a consulta a causa de la presencia de una masa en su ojo izquierdo, la cual aumentaba de...

The analysis of the pre-Andean history of the Central Andes shows a complex tectonic evolution. The basement of the Andean continental margin was formed by the accretion of Precambrian blocks during the formation of Rodi...

This article reviews the current status of lattice-dynamical calculations in crystals, using density-functional perturbation theory, with emphasis on the plane-wave pseudopotential method. Several specialized topics are ...