Full Text Journal Articles by
Author Alexandre Presas

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Resonance vibration interventions in the femur: Experimental-numerical modelling approaches.

Alexandre Presas, David Valentin, Joseph Deering, Marian Kampschulte, Bosco Yu, Kathryn Grandfield, Elisa Mele, Christoph Biehl, Gabriele A Krombach, Christian Heiss, Wolfram A Bosbach,

<h4>Motive</h4>External vibration excitation might be key to many novel non-surgical interventions for pathologies in the musculoskeletal system and in other parts of the human organism. Lack of understanding about vibration patterns, their controllability, and reproducibility are three limitations of ongoing research. This study establishes a bovine vibration model and animal ... Read more >>

J Mech Behav Biomed Mater (Journal of the mechanical behavior of biomedical materials)
[2021, 124:104850]

Cited: 0 times

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Implant resonance and the mechanostat theory: Applications of therapeutic ultrasound for porous metallic scaffolds.

Joseph Deering, Alexandre Presas, Bosco Yu, David Valentin, Christian Heiss, Wolfram A Bosbach, Kathryn Grandfield,

The development of treatment strategies for improving secondary stability at the bone-implant interface is a challenge. Porous implants are one solution for improving long-term implant stability, but the osteoconduction process of implants into the bone can be slow. Strain-driven osteogenesis from the mechanostat theory offers insight into pathways for post-operative ... Read more >>

Mater Sci Eng C Mater Biol Appl (Materials science & engineering. C, Materials for biological applications)
[2021, 125:112070]

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Correction: On the quantification of local power densities in a new vibration bioreactor.

David Valentin, Alexandre Presas, Charline Müntze-Röhr, Elisa Mele, Christoph Biehl, Christian Heiss, Wolfram A Bosbach,

[This corrects the article DOI: 10.1371/journal.pone.0245768.]. ... Read more >>

PLoS One (PloS one)
[2021, 16(3):e0248640]

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On the quantification of local power densities in a new vibration bioreactor.

David Valentin, Alexandre Presas, Charline Roehr, Elisa Mele, Christoph Biehl, Christian Heiss, Wolfram A Bosbach,

We investigate the power densities which are obtainable locally in a vibration bioreactor. These reactor systems are of great relevance for research about oncological or antibacterial therapies. Our focus lies on the local liquid pressure caused by resonance vibration in the fluid contained by the reactor's petri dish. We use ... Read more >>

PLoS One (PloS one)
[2021, 16(1):e0245768]

Cited: 1 time

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Response of Saos-2 osteoblast-like cells to kilohertz-resonance excitation in porous metallic scaffolds.

Joseph Deering, Alexandre Presas, Bryan E J Lee, David Valentin, Bosco Yu, Christian Heiss, Kathryn Grandfield, Wolfram A Bosbach,

Post-operative therapy for joint replacement is often performed to optimize bone volume and bone-implant contact. Methods, such as pulsed therapeutic ultrasound, have been shown to be a valuable addition to regular physiotherapy to increase bone regeneration. To evaluate the efficacy of kilohertz-frequency (kHz) resonant stimuli to additively manufactured implant analogues, ... Read more >>

J Mech Behav Biomed Mater (Journal of the mechanical behavior of biomedical materials)
[2020, 106:103726]

Cited: 1 time

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Detection of Hydraulic Phenomena in Francis Turbines with Different Sensors.

David Valentín, Alexandre Presas, Carme Valero, Mònica Egusquiza, Eduard Egusquiza,

Nowadays, hydropower is demanded to provide flexibility and fast response into the electrical grid in order to compensate the non-constant electricity generation of other renewable sources. Hydraulic turbines are therefore demanded to work under off-design conditions more frequently, where different complex hydraulic phenomena appear, affecting the machine stability as well ... Read more >>

Sensors (Basel) (Sensors (Basel, Switzerland))
[2019, 19(18):]

Cited: 0 times

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Experimental and Numerical Design and Evaluation of a Vibration Bioreactor using Piezoelectric Patches.

David Valentin, Charline Roehr, Alexandre Presas, Christian Heiss, Eduard Egusquiza, Wolfram A Bosbach,

In this present study, we propose a method for exposing biological cells to mechanical vibration. The motive for our research was to design a bioreactor prototype in which in-depth in vitro studies about the influence of vibration on cells and their metabolism can be performed. The therapy of cancer or ... Read more >>

Sensors (Basel) (Sensors (Basel, Switzerland))
[2019, 19(2):]

Cited: 1 time

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A Review of PZT Patches Applications in Submerged Systems.

Alexandre Presas, Yongyao Luo, Zhengwei Wang, David Valentin, Mònica Egusquiza,

Submerged systems are found in many engineering, biological, and medicinal applications. For such systems, due to the particular environmental conditions and working medium, the research on the mechanical and structural properties at every scale (from macroscopic to nanoscopic), and the control of the system dynamics and induced effects become very ... Read more >>

Sensors (Basel) (Sensors (Basel, Switzerland))
[2018, 18(7):]

Cited: 4 times

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Feasibility of Detecting Natural Frequencies of Hydraulic Turbines While in Operation, Using Strain Gauges.

David Valentín, Alexandre Presas, Matias Bossio, Mònica Egusquiza, Eduard Egusquiza, Carme Valero,

Nowadays, hydropower plays an essential role in the energy market. Due to their fast response and regulation capacity, hydraulic turbines operate at off-design conditions with a high number of starts and stops. In this situation, dynamic loads and stresses over the structure are high, registering some failures over time, especially ... Read more >>

Sensors (Basel) (Sensors (Basel, Switzerland))
[2018, 18(1):]

Cited: 4 times

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Accurate Determination of the Frequency Response Function of Submerged and Confined Structures by Using PZT-Patches†.

Alexandre Presas, David Valentin, Eduard Egusquiza, Carme Valero, Mònica Egusquiza, Matias Bossio,

To accurately determine the dynamic response of a structure is of relevant interest in many engineering applications. Particularly, it is of paramount importance to determine the Frequency Response Function (FRF) for structures subjected to dynamic loads in order to avoid resonance and fatigue problems that can drastically reduce their useful ... Read more >>

Sensors (Basel) (Sensors (Basel, Switzerland))
[2017, 17(3):]

Cited: 5 times

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