Papers by Mariano Del Río
Animal Biodiversity and Conservation, 2020
Deer antlers can be used as an index of individual performance both in ecological and productive ... more Deer antlers can be used as an index of individual performance both in ecological and productive contexts. Their quality is often measured only by their biometrical features, such as size, asymmetry or weight. Mechanic characteristics cannot normally be measured without destroying the antler and hence losing the commercial value of the trophies. Here, we studied ultrasonic velocities, density, and tensile strength across various sections of cast antlers of Iberian red deer (Cervus elaphus hispanicus). We found that the speed value depended on the section of the antler and the propagation direction. For antler sections, velocities were lowest for mid–beam and highest for brow tine. Results were similar for density and indirect tensile strength, probably related to differences in functionality among antler sections. Density explained most of the variability of ultrasound–speed. The time elapsed from antler shed affected density more than ultrasound speed. The indirect tensile strength...
GPR prospection in the Ossoue glacier (Pyrenees)
2012 14th International Conference on Ground Penetrating Radar (GPR), 2012
ABSTRACT
Journal of Environmental and Engineering Geophysics, 2014
The Ossoue glacier in the Vignemale massif (3,298 m) is currently the longest and second largest ... more The Ossoue glacier in the Vignemale massif (3,298 m) is currently the longest and second largest of the Pyrenees (1,400-m length, 50-ha area), and the only one presenting glacier tongue morphology. We describe 50 MHz ground penetrating radar (GPR) and laser scanner surveys from which we assess the current state and dynamics of the glacier. In 2011, nearly 1,900 m of GPR profiles over the upper half of Ossoue glacier yielded up to 45 m of depth, an average value of 30 m thickness of the subglacial layer, and internal structure and layering. We compare the results with those from a study in 2006 of the same glacier, showing similar bedrock morphology with slightly less overall ice thickness than in 2011. Laser scanner surveys at the snout showed thinning rates of 3.32 m between 2010 and 2011, 4.15 m between 2011 and 2012, and an average loss of 7.47 m between 2010 and 2012. Present-day changes in Ossoue glacier are characterized by extensive thinning caused by melting and collapse of ...
The natural stone industry plays an important role in construction sector activity, and due to th... more The natural stone industry plays an important role in construction sector activity, and due to this fact the accurate knowledge of the physico-mechanical properties of this kind of materials is indispensable for the configuration of their quality standards. In this work we have optimized an acoustic technique, based on the measurement of the fundamental mode resonance frequency of the longitudinal wave, to determine Young's modulus in different granite variety specimens. The equipment employed was an Erudite MK3 test system (CNS Farnell) working in the range 1 to 100 kHz. The resonance frequencies obtained ranged from 4 to 10 kHz, depending on the granite variety. Based on these resonance frequencies, we obtained values of the longitudinal wave velocities ranging from 2500 to 6000 m/s and of the dynamic Young's modulus from 20 to 100 GPa. We also compared the dynamic modulus results with the static Young's modulus obtained by destructive techniques, and analysed its rela...
12 pages, 7 figures.-- Communication presented at: Acustica 2008 (Coimbra, Portugal, 20-22 Oct 20... more 12 pages, 7 figures.-- Communication presented at: Acustica 2008 (Coimbra, Portugal, 20-22 Oct 2008), comprising: V Congresso Iberico de Acustica, XXXIX Congreso Espanol de Acustica TecniAcustica 2008, Acoustics European Symposium, ExpoAcustica 2008.
The Ossoue glacier in the Vignemale massif (3,298 m) is currently the longest and second largest ... more The Ossoue glacier in the Vignemale massif (3,298 m) is currently the longest and second largest of the Pyrenees (1,400-m length, 50-ha area), and the only one presenting glacier tongue morphology. We describe 50 MHz ground penetrating radar (GPR) and laser scanner surveys from which we assess the current state and dynamics of the glacier. In 2011, nearly 1,900 m of GPR profiles over the upper half of Ossoue glacier yielded up to 45 m of depth, an average value of 30 m thickness of the subglacial layer, and internal structure and layering. We compare the results with those from a study in 2006 of the same glacier, showing similar bedrock morphology with slightly less overall ice thickness than in 2011. Laser scanner surveys at the snout showed thinning rates of 3.32 m between 2010 and 2011, 4.15 m between 2011 and 2012, and an average loss of 7.47 m between 2010 and 2012. Present-day changes in Ossoue glacier are characterized by extensive thinning caused by melting and collapse of ...
Análisis y control de indicadores geomorfológicos en el Parque Nacional de los Picos de Europa
Resonance-based acoustic technique applied to the determination of Young’s modulus in granites
Determination of dynamic elastic constants in granite susing through-transmission A-Scan and resonance-based ultrasonic techniques
Proceedings of the Interntional Congress on Ultrasonics, 2007
Characterization of Cement Mortars with Ultrasonic Testing
Recent Advances in Multidisciplinary Applied Physics, 2005
Determination of dynamic elastic constants in granite susing through-transmission A-Scan and resonance-based ultrasonic techniques
Proceedings of the Interntional Congress on Ultrasonics, 2007
Uploads
Papers by Mariano Del Río