The impact of reinforcement and piezoelectricity on SH wave propagation in irregular imperfectly-bonded layered FGPM structures: An analytical approach

During a vehicle crash stress waves can be generated at the impact point and propagate through the vehicle structure. The generation of these waves is dependent, in general, on the crash type and, in particular, on the impact contact characteristics. This has consequences with respect to different crash barrier interfaces for vehicle evaluation. The two barriers most commonly used to evaluate the response of a vehicle in a frontal impact are the rigid barrier and the offset deformable barrier. They constitute different crash modes, full frontal and offset. Consequently it would be expected that there are different deformation patterns between the two. However, an additional possible contributor to the difference is that an impact into a rigid barrier generates waves of significantly greater stress than impacts with the deformable one. If stress waves are a significant component of real world final deformation patterns then, the choice of barrier interface and its effective stiffness is critical. To evaluate this conjecture, models of two types of rails each undergoing two different types of impacts, are analyzed using an explicit dynamic finite element code. Results show that the energy perturbation along the rail depends on the barrier type and that the early phase of wave propagation has very little effect on the final deformation pattern. This implies that in the real world conditions, the stress wave propagation along the rail has very little effect on the final deformed shape of the rail.

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A Venezuelan Position on the Bolivarian Revolution

Stream: Interdisciplinary Journal of Communication ◽

10.21810/strm.v9i1.244 ◽

2017 ◽

Vol 9 (1) ◽

pp. 6-13

Author(s):

Douglas Amundaray

Keyword(s):

High School ◽

Knowledge Production ◽

Presidential Election ◽

Analytical Approach ◽

Bolivarian Revolution ◽

Mainstream Media ◽

The World ◽

The Impact

My interest in politics started during my high school years. At 13 I got hooked on the Venezuelan political scenario with the same intensity as most adults. It is not usual for a teenager to be interested in politics, but the impact of the 1998 Venezuelan presidential election was so significant, the coverage by media so widespread, that it was practically inevitable that I would become enthralled in the outcome. “How does who you are and where you stand in relation to others shape what you know about the world?” By raising this question, David Takacs (2002) introduces the importance of positionality to knowledge production. Positionality provides a way to understand how objective or subjective researchers are during knowledge production (Lave & Wenger, 1991). I can firmly say that the representations portrayed in Venezuela’s mainstream media built up my character, and shaped the analytical approach that I follow today as a scholar.

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Investigation of Stress Wave Propagation in Brain Tissues Through the Use of Finite Element Method

Volume 2: Biomedical and Biotechnology Engineering ◽

10.1115/imece2010-39994 ◽

2010 ◽

Author(s):

Biaobiao Zhang ◽

W. Steve Shepard ◽

Candace L. Floyd

Keyword(s):

Finite Element ◽

Wave Propagation ◽

Brain Injury ◽

Stress Wave ◽

Brain Research ◽

Complex Structure ◽

Stress Wave Propagation ◽

Wave Loads ◽

The Impact ◽

The Brain

Because axons serve as the conduit for signal transmission within the brain, research related to axon damage during brain injury has received much attention in recent years. Although myelinated axons appear as a uniform white matter, the complex structure of axons has not been thoroughly considered in the study of fundamental structural injury mechanisms. Most axons are surrounded by an insulating sheath of myelin. Furthermore, hollow tube-like microtubules provide a form of structural support as well as a means for transport within the axon. In this work, the effects of microtubule and its surrounding protein mediums inside the axon structure are considered in order to obtain a better understanding of wave propagation within the axon in an attempt to make progress in this area of brain injury modeling. By examining axial wave propagation using a simplified finite element model to represent microtubule and its surrounding proteins assembly, the impact caused by stress wave loads within the brain axon structure can be better understood. Through conducting a transient analysis as the wave propagates, some important characteristics relative to brain tissue injuries are studied.

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Wave Propagation in Elastic Solids: An Analytical Approach

Lamb-Wave Based Structural Health Monitoring in Polymer Composites - Research Topics in Aerospace ◽

10.1007/978-3-319-49715-0_3 ◽

2017 ◽

pp. 17-62

Author(s):

N. Rauter ◽

B. Hennings ◽

M. N. Neumann ◽

A. Asmus ◽

R. Lammering

Keyword(s):

Wave Propagation ◽

Analytical Approach ◽

Elastic Solids

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Make, share, review, remix: Unpacking the impact of the internet on contemporary creativity

Convergence The International Journal of Research into New Media Technologies ◽

10.1177/1354856517751391 ◽

2018 ◽

Vol 25 (5-6) ◽

pp. 1168-1184 ◽

Cited By ~ 2

Author(s):

Ioana Literat

Keyword(s):

Life Cycle ◽

New Media ◽

Analytical Approach ◽

The Internet ◽

Creative Activity ◽

Wide Range ◽

Product Creation ◽

Creative Products ◽

Multiple Domains ◽

The Impact

This article advances a holistic framework that aims to facilitate a better understanding of the nuanced impact of the internet on contemporary creative participation. Functioning simultaneously as the context, locus, and medium for creative activity, the internet affects each stage in the life cycle of a creative product – creation, distribution, interpretation, and remix. In addition, this influence is felt in a wide range of creative products: off-line and online, professional and vernacular. Previous research has not examined these different processes and types of creative output in conversation with each other; by advancing an integrative analytical approach and synthesizing research from multiple domains, this work attempts to address this gap. As a way to illuminate this impact and demonstrate the value of the proposed framework, the article applies this framework to three case studies: a work of off-line art ( The Artist Is Present), online art ( Moon), and online nonart or vernacular online creativity (Pepe the Frog memes). This analysis facilitates a deeper understanding of these interrelated processes, attends to the complex ways in which new media blurs the borders between those categorizations, and discusses the potential implications of these complex contemporary dynamics.

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