Search results for "General Materials Science"
showing 10 items of 6837 documents
Calcium mediated polyelectrolyte adsorption on like-charged surfaces.
2011
International audience; Monte Carlo simulations within the primitive model of calcium-mediated adsorption of linear and comb polyelectrolytes onto like-charged surfaces are described, focusing on the effect of calcium and polyion concentrations as well as on the ion pairing between polymers and calcium ions. We use a combination of Monte Carlo simulations and experimental data from titration and calcium binding to quantify the ion pairing. The polymer adsorption is shown to occur as a result of surface overcharging by Ca2+ and ion pairing between charged monomers and Ca2+. In agreement with experimental observations, the simulations predict that the polymer adsorption isotherm goes through …
The Other Side as a Rule Rather than an Exception
2015
Abstract Currently, intercultural and heterogeneous realities set the tone in 21st literary education. Therefore, the role of multicultural children's literature plays an essential role in order to reflect this intercultural diversity in Spanish classrooms. In this regard, The Other Side (2001) portrays an African American experience where interaction, communication and negotiation become crucial aspects for their protagonists. In this way, this picture book can be used not only to teach English as a foreign language in primary school, but also to show values like respect, tolerance and partnership.
Clean Agent Selection Approached by Fuzzy TOPSIS Decision-Making Method
2008
Abstract. It is well known that halons are ozone-depleting substances and their release into the atmosphere has contributed in the last decades to the reduction in the ozone layer. In consequence to the Montreal Protocol, an international agreement designed to gradually eliminate the use of such substances, fire protection industry researchers faced the challenge of finding effective solutions to replace halon extinguishers. This research aims to provide a method to support the decision maker in the selection of the most suitable extinguisher substance for a specific application. According to such framework, a set of quantitative and qualitative criteria has been established in the decision…
L'écart et l'entre-deux : traduire la culture
2011
Comparative linguistics seems to suggest that the gap between two languages can be filled by grammar. But mapping the structural gaps between languages hardly makes for the more fundamental gap that is created by the writing of a new text, a supposedly identical addendum to the first. Writing that new text entails questions about the nature of texts, their intentions, their interpretations. Translation must therefore develop a hermeneutical approach. This critical stance is about sorting out what belongs to the languages and what belongs to the text as a specific unit, as a cultural and authorial unit. Because of its cultural nature, translation questions the way one can carry meaning acros…
Crystal structure of trans-dichlorido(4-nitroaniline-κN 1)(piperidine-κN)platinum(II)
2015
The packing of the title compound features N—H⋯Cl hydrogen bonds and π–π stacking interactions, which form one-dimensional chains of molecules parallel to [001] further linked via N—H⋯O interactions.
Gender Trends in Tourism Destination
2013
Abstract The tourism experience was perceived traditionally in terms of products, destinations and consumption patterns. The “new mobility turn” sees the holiday experience as “performance”, “surveillance”, “play”, relationships “at-a-distance”, the impermanence of “sandcastles”, place making, etc. Gale (2007) stated five principles of this turn in tourism: it studies the mobility of individuals; it acknowledges material and immaterial structures; it deals with immobility and power relations; it recognizes virtual and imaginative forms of mobility; and it is concerned with environmental and global consequences. Destinations are not perceived now as fixed unities but as“sandcastles” made of …
Co-parental Couples and New Families: A Study of the Primary Triad
2015
Abstract Starting from current areas of research in the field of developmental theories, the aim of this work is to analyse parent-child interactions within a primary triad and to consider co-parenting couple and their children as an interactive matrix. In particular, parent-child relationship could be observed trough new developmental units of observation and coding systems in the multiple scenarios of new families. The deepening of this study may promote an effective connection between research and educational support as well as clinical work with families and parental couples.
Electronic Energy Meter Based on a Tunnel Magnetoresistive Effect (TMR) Current Sensor
2017
In the present work, the design and microfabrication of a tunneling magnetoresistance (TMR) electrical current sensor is presented. After its physical and electrical characterization, a wattmeter is developed to determine the active power delivered to a load from the AC 50/60 Hz mains line. Experimental results are shown up to 1000 W of power load. A relative uncertainty of less than 1.5% with resistive load and less than 1% with capacitive load was obtained. The described application is an example of how TMR sensing technology can play a relevant role in the management and control of electrical energy.
Patterning of supported gold monolayers via chemical lift-off lithography
2017
The supported monolayer of Au that accompanies alkanethiolate molecules removed by polymer stamps during chemical lift-off lithography is a scarcely studied hybrid material. We show that these Au–alkanethiolate layers on poly(dimethylsiloxane) (PDMS) are transparent, functional, hybrid interfaces that can be patterned over nanometer, micrometer, and millimeter length scales. Unlike other ultrathin Au films and nanoparticles, lifted-off Au–alkanethiolate thin films lack a measurable optical signature. We therefore devised fabrication, characterization, and simulation strategies by which to interrogate the nanoscale structure, chemical functionality, stoichiometry, and spectral signature of t…
Prompt Determination of the Mechanical Properties of Industrial Polypropylene Sandwich Pipes
2021
A simple and prompt method to determine the mechanical properties of industrial multilayer extrusion polypropylene pipes for a gravity sewer network is suggested. The engineering formulas included for calculating the permissible thickness and relative position of a foam core in the pipes are based on a linear-elastic approximation and the rule of mixtures. The applicability of the approximation was justified experimentally during investigation of the effective tensile characteristics of single- and multilayer pipes and each layer specimen by using traditional tests and finite-element calculations. The results obtained were used to formulate engineering recommendations for calculations of th…