Role of Material Composition in Photothermal Actuation of DASA-Based Polymers

2022 ◽  
Author(s):  
Miranda M. Sroda ◽  
Jaejun Lee ◽  
Younghoon Kwon ◽  
Friedrich Stricker ◽  
Minwook Park ◽  
...  
Keyword(s):  
Material Composition

On the Role of Nonlinearity in the Dynamic Behavior of Rubber Components

1986 ◽  
Vol 59 (5) ◽  
pp. 740-764 ◽  
Author(s):  
J. Harris ◽  
A. Stevenson
Keyword(s):  
Dynamic Behavior ◽  
Nonlinear Behavior ◽  
Material Composition ◽  
Geometrical Design ◽  
Linear Spring ◽  
Case Design

Abstract This paper has discussed the transmissibility behavior of rubber mounts with reference to nonlinearity originating from the material composition and from the geometrical design. It has been shown that in many cases, linear assumptions can be made, provided the limitations of these assumptions are understood. In this case, design can proceed as for a linear spring. Finally, there is some indication of how the nonlinear behavior can be exploited to advantage in the design of novel suspension components.

scholarly journals The Key Role of Active Sites in the Development of Selective Metal Oxide Sensor Materials

Sensors ◽  
2021 ◽  
Vol 21 (7) ◽  
pp. 2554
Author(s):  
Artem Marikutsa ◽  
Marina Rumyantseva ◽  
Elizaveta A. Konstantinova ◽  
Alexander Gaskov
Keyword(s):  
Metal Oxide ◽  
Metal Oxides ◽  
Active Sites ◽  
Noble Metals ◽  
Material Composition ◽  
Mixed Metal Oxides ◽  
Mixed Metal ◽  
Sensor Materials ◽  
The Impact

Development of sensor materials based on metal oxide semiconductors (MOS) for selective gas sensors is challenging for the tasks of air quality monitoring, early fire detection, gas leaks search, breath analysis, etc. An extensive range of sensor materials has been elaborated, but no consistent guidelines can be found for choosing a material composition targeting the selective detection of specific gases. Fundamental relations between material composition and sensing behavior have not been unambiguously established. In the present review, we summarize our recent works on the research of active sites and gas sensing behavior of n-type semiconductor metal oxides with different composition (simple oxides ZnO, In2O3, SnO2, WO3; mixed-metal oxides BaSnO3, Bi2WO6), and functionalized by catalytic noble metals (Ru, Pd, Au). The materials were variously characterized. The composition, metal-oxygen bonding, microstructure, active sites, sensing behavior, and interaction routes with gases (CO, NH3, SO2, VOC, NO2) were examined. The key role of active sites in determining the selectivity of sensor materials is substantiated. It was shown that the metal-oxygen bond energy of the MOS correlates with the surface acidity and the concentration of surface oxygen species and oxygen vacancies, which control the adsorption and redox conversion of analyte gas molecules. The effects of cations in mixed-metal oxides on the sensitivity and selectivity of BaSnO3 and Bi2WO6 to SO2 and VOCs, respectively, are rationalized. The determining role of catalytic noble metals in oxidation of reducing analyte gases and the impact of acid sites of MOS to gas adsorption are demonstrated.

The role of material composition, fiber properties and deformation mechanisms in the deep drawing of paperboard

Cellulose ◽  
2015 ◽  
Vol 22 (5) ◽  
pp. 3377-3395 ◽  
Author(s):  
Marek Hauptmann ◽  
Malte Wallmeier ◽  
Klaus Erhard ◽  
Roland Zelm ◽  
Jens-Peter Majschak
Keyword(s):  
Deep Drawing ◽  
Material Composition ◽  
Deformation Mechanisms ◽  
Fiber Properties

scholarly journals The Role of Geometry on a Self-Sustaining Bio-Receptive Concrete Panel for Facade Application

2021 ◽  
Vol 13 (13) ◽  
pp. 7453
Author(s):  
Kazi Fahriba Mustafa ◽  
Alejandro Prieto ◽  
Marc Ottele
Keyword(s):  
Design Variable ◽  
Water Retention ◽  
Absorption Capacity ◽  
Design Guidelines ◽  
Environmental Benefits ◽  
Material Composition ◽  
Surface Geometry ◽  
Concrete Panels

Bio-receptivity refers to the aptitude of a material to allow for the natural growth of small plant species on stony surfaces with minimum external influence. Despite the numerous associated environmental benefits, the growth of mosses and lichens on facades has always been viewed as a negative phenomenon due to the random and shabby growth conditions. This research dealt with the design of a self-sustaining bio-receptive concrete facade system with an aim to create a more sustainable and green concrete for the construction industry. The research used surface geometry as a design variable to facilitate moss growth on concrete panels in an ordered and systematic manner. The exercise was an attempt to not only address the functional aspect of bio-receptivity but also its aesthetical quality, which has a primary influence on people’s perception of bio-receptivity and can promote mass use of this type of concrete material. The research was conducted in a top-down approach, where first, through design by research, six distinctly designed concrete panels were fabricated using adapted material composition (blast furnace cement with 75% slag, 0.6 water/cement, sand 0–4 mm and gravel 5–8 mm) as the boundary condition. The concrete mixture together with no curing policy resulted in highly porous concrete panels, suitable for bio-receptive properties. Next in the design validation phase, the influence of surface geometry/roughness on the water retention ability of the panels and the subsequent moss growth on the panels were evaluated through in vitro experiments. The water retention experiment of the panels was based on quantitative measurements for weight, relative humidity and temperature at several time intervals. The moss-growing experiment was carried out within an ideal greenhouse condition where the panels were initially inoculated with moss spores; the results were based on qualitative observation for a period of 4 months. According to the comparative analysis of these results, with the same material composition, Panel 2 showed the highest bio-colonization owing to its prominent surface geometry, whereas Panel 5 showed the least bio-colonization owing to its plain surface despite high absorption capacity. Thus, the role of geometry has been extensively proven in this research and as an outcome a set of general design guidelines have been formulated for a self-sustaining bio-receptive concrete facade panel, using geometry as a design variable for bio-receptivity.

Semen, Menses, Blood: Material in Generation

2019 ◽  
pp. 143-186
Author(s):  
Adriel M. Trott
Keyword(s):  
Material Composition ◽  
Central Argument ◽  
Formal Power

This chapter presents the central argument of the book: the material capacities of semen contribute to its capacity to animate menses. The chapter considers how semen’s material produces formal capacities by comparing semen to blood: blood is hot through dependence on something external to it, while semen’s heat is internal to it. This internal power is what makes it formal power. The case is made for how matter can have power without being teleological. The particulars of how semen causes by comparison to the positions of pansomatism and preformationism, which Aristotle rejects, are laid out and the central aspects of the material composition of semen are considered with a focus on the role of vital heat. Vital heat is a source of fostering life beyond the generation of animals, in stomachs, earth and sun, which points to a further sense of its materiality.

scholarly journals Magnifying the first points of life: Harvey and Descartes on generation and scale

2021 ◽  
pp. 007327532110334
Author(s):  
Christoffer Basse Eriksen
Keyword(s):  
Seventeenth Century ◽  
Rene Descartes ◽  
The Other ◽  
Material Composition ◽  
Living Matter ◽  
Other Hand ◽  
René Descartes ◽  
Observational Strategy ◽  
The Way

In this essay, I study the contested role of magnification as an observational strategy in the generation theories of William Harvey and René Descartes. During the seventeenth century, the grounds under the discipline of anatomy were shifting as knowledge was increasingly based on autopsia and observation. Likewise, new theories of generation were established through observations of living beings in their smallest state. But the question formed: was it possible to extend vision all the way down to the first points of life? Arguing that the potential of magnification hinged on the metaphysics of living matter, I show that Harvey did not consider observational focus on the material composition of blood and embryos to be conducive to knowledge of living bodies. To Harvey, generation was caused by immaterial, and thus in principle invisible, forces that could not be magnified. Descartes, on the other hand, believed that access to the subvisible scale of natural bodies was crucial to knowledge about their nature. This access could be granted through rational introspection, but possibly also through powerful microscopes. The essay thus ends with a reflection on the importance of Cartesian corpuscularianism for the emergence of microscopical anatomy in seventeenth-century England.

scholarly journals A criminal mind? A damaged brain? Narratives of criminality and culpability in the celebrated case of Aaron Hernandez

2019 ◽  
Vol 16 (3) ◽  
pp. 395-413
Author(s):  
Kathryn Henne ◽  
Matt Ventresca
Keyword(s):  
Criminal Behavior ◽  
National Football League ◽  
Material Composition ◽  
Economic Conditions ◽  
Media Discourse ◽  
Life And Death ◽  
Critical Attention ◽  
The Media ◽  
Political Economic

This article examines the media discourse surrounding the life and death of former National Football League player Aaron Hernandez, who died by suicide while incarcerated for first-degree murder. As a postmortem analysis found evidence of notable degenerative brain disease, differing explanations and speculations remain about the causes of his criminal behavior. This analysis illustrates how journalistic narratives attribute Hernandez’s criminality to either the material composition of his damaged brain or how his tumultuous background affected psychological makeup. Both narratives minimize the structural and political economic conditions that enabled this particular case of celebrated criminality. Cultural criminological and socio-legal insights aid in elucidating how notions of racialized masculinity and neurocriminology come to constitutively inform framings of Hernandez’s crimes, motivations, and actions while also directing critical attention away from the influence of relevant institutions, particularly sport, and instrumentalizing the role of violence. This article concludes with a reflection on the underpinning tensions revealed through depictions of Hernandez, his mind, and his brain, arguing that they surpass news and media stories and actually implicate debates about the growing influence of neuroscience in understandings of social problems, including crime.

scholarly journals Role of starting material composition in interfacial damage morphology of hafnia-silica multilayer coatings

1999 ◽  
Author(s):  
S. C. Weakley ◽  
Christopher J. Stolz ◽  
Zhouling Wu ◽  
Ron P. Bevis ◽  
Marc K. Von Gunten
Keyword(s):  
Starting Material ◽  
Material Composition ◽  
Multilayer Coatings ◽  
Interfacial Damage ◽  
Damage Morphology

scholarly journals Acoustic chemometrics for material composition quantification in pneumatic conveying — The critical role of representative reference sampling

2013 ◽  
Vol 237 ◽  
pp. 506-513 ◽  
Author(s):  
Claas Wagner ◽  
Felicia Nkem Ihunegbo ◽  
Maths Halstensen ◽  
Kim H. Esbensen
Keyword(s):  
Critical Role ◽  
Material Composition ◽  
Pneumatic Conveying
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