Demic expansion or cultural diffusion: migration and Basque origins

2012 ◽  
pp. 224-249
Author(s):  
Kristin L. Young ◽  
Eric J. Devor ◽  
Michael H. Crawford
Keyword(s):  
Cultural Diffusion ◽  
Diffusion Migration

The Contemplative Elite and Capitalism

2018 ◽  
Author(s):  
Jaime Kucinskas
Keyword(s):  
Field Theory ◽  
Social Networks ◽  
Social Movement ◽  
Cultural Change ◽  
Social Reform ◽  
Symbolic Power ◽  
Institutional Entrepreneurship ◽  
Social Reforms ◽  
Cultural Diffusion ◽  
Movement Mobilization

This chapter introduces the contemplative mindfulness movement, its successes in legitimizing and popularizing mindful meditation, and its shortcomings. This case demonstrates how elite movements can initiate widespread cultural change by combining elements of social movement mobilization, institutional entrepreneurship, field theory, and cultural diffusion. Investigating the contemplatives sheds light on how a movement can support elites’ cultural pet projects across multiple powerful institutional fields. This approach to cultural change is particularly efficacious for elites’ and professionals’ initiatives for social reform, as they can draw upon their social networks, institutional resources, and symbolic power to advance their causes in the course of their everyday lives at work. While such movements may succeed in spreading compelling new cultures, they may struggle to initiate deeper structural social reforms.

scholarly journals Flow Control Techniques for Enhancing the Bio-Recognition Performance of Microfluidic-Integrated Biosensors

2021 ◽  
Vol 11 (15) ◽  
pp. 7168
Author(s):  
Fatemeh Shahbazi ◽  
Mohammad Souri ◽  
Masoud Jabbari ◽  
Amir Keshmiri
Keyword(s):  
Flow Control ◽  
Recognition Performance ◽  
Active Flow Control ◽  
Geometry Optimization ◽  
Cost Effective ◽  
Optimization Methods ◽  
Biological Species ◽  
Binding Assays ◽  
Dna Strands ◽  
Diffusion Migration

Biosensors are favored devices for the fast and cost-effective detection of biological species without the need for laboratories. Microfluidic integration with biosensors has advanced their capabilities in selectivity, sensitivity, controllability, and conducting multiple binding assays simultaneously. Despite all the improvements, their design and fabrication are still challenging and time-consuming. The current study aims to enhance microfluidic-integrated biosensors’ performance. Three different functional designs are presented with both active (with the help of electroosmotic flow) and passive (geometry optimization) methods. For validation and further studies, these solutions are applied to an experimental setup for DNA hybridization. The numerical results for the original case have been validated with the experimental data from previous literature. Convection, diffusion, migration, and hybridization of DNA strands during the hybridization process have been simulated with finite element method (FEM) in 3D. Based on the results, increasing the velocity on top of the functionalized surface, by reducing the thickness of the microchamber in that area, would increase the speed of surface coverage by up to 62%. An active flow control with the help of electric field would increase this speed by 32%. In addition, other essential parameters in the fabrication of the microchamber, such as changes in pressure and bulk concentration, have been studied. The suggested designs are simple, applicable and cost-effective, and would not add extra challenges to the fabrication process. Overall, the effect of the geometry of the microchamber on the time and effectiveness of biosensors is inevitable. More studies on the geometry optimization of the microchamber and position of the electrodes using machine learning methods would be beneficial in future works.

scholarly journals Migration from acrylonitrile butadiene styrene (ABS) polymer: swelling effect of food simulants compared to real foods

2021 ◽  
Author(s):  
Valeria Guazzotti ◽  
Annika Ebert ◽  
Anita Gruner ◽  
Frank Welle
Keyword(s):  
Acrylonitrile Butadiene Styrene ◽  
Polymer Swelling ◽  
Food Simulants ◽  
Diffusion Parameters ◽  
Compliance Testing ◽  
Diffusion Migration ◽  
Different Temperatures ◽  
Effect Of Food ◽  
High Concentrations ◽  
Butadiene Styrene

AbstractMaterials and articles made of acrylonitrile–butadiene–styrene (ABS) intended for contact with food must comply with the requirements of the European Plastic Regulation (EU) 10/2011, which lays down the food simulants and the time/temperature conditions to be applied for migration testing. Previous studies indicated that high concentrations of ethanol at temperatures above ambient may lead to swelling of ABS polymers resulting in increased migration. In this study migration kinetic data for a set of model substances at different temperatures were obtained using both food simulants stipulated in EU regulations and real food (milk, cream and olive oil). At the same time, the extent of polymer swelling was gravimetrically characterized after contact with simulants and different foods tested at several conditions to cover the majority of foreseeable applications of ABS. The obtained results confirmed that the use of high concentrations of ethanol–water, especially at high temperatures, causes the swelling of ABS polymers and results in significantly higher migration values compared to the tested foods as well as Tenax®. None of the real foods studied cause significant swelling of ABS. The widely used simulant 95% (v/v) aqueous ethanol proves not be suitable for compliance testing of ABS under the recommended conditions of Regulation (EU) 10/2011. Swelling of the polymer results in artificially higher diffusion coefficients or lower activation energies of diffusion. Migration prediction using polymer-specific diffusion parameters should therefore be considered to avoid over-conservative risk assessment for food contact materials and articles made of ABS.

A Case Study in Cultural Diffusion: British Ice Hockey and American Influences in Europe

2001 ◽  
Vol 4 (1) ◽  
pp. 49-62 ◽  
Author(s):  
O. Kivinen ◽  
J. Mesikämmen ◽  
T. Metsä-Tokila
Keyword(s):  
Ice Hockey ◽  
Cultural Diffusion

scholarly journals Juventude, imagem e cidade: experiências de pesquisa etnográfica com jovens urbanos em Porto Alegre

ILUMINURAS ◽  
2017 ◽  
Vol 18 (44) ◽  
Author(s):  
Guillermo Stefano Rosa Gómez ◽  
Jose Luis Abalos Junior ◽  
Manoel Cláudio Mendes Gonçalves da Rocha
Keyword(s):  
Social Science ◽  
Hip Hop ◽  
Ethnographic Research ◽  
Visual Anthropology ◽  
City Image ◽  
Porto Alegre ◽  
Learning And Teaching ◽  
Cultural Diffusion ◽  
Imaging Approach ◽  
The City

O presente artigo é resultado de um diálogo entre três experiências de produção coletiva de pesquisa etnográfica, que têm em comum os temas juventude, imagem e cidade. Um conjunto de nove etnografias visuais foi realizado a partir de uma parceria entre os pesquisadores associados ao Núcleo de Antropologia Visual (NAVISUAL/PPGAS/UFRGS) e os estudantes da disciplina de Antropologia Visual (2016/1) ministrada ao curso de Ciências Sociais da UFRGS sob a coordenação da antropóloga e professora Cornelia Eckert. As reflexões que aqui apresentamos percorrem um processo de ensino-aprendizagem implicado na experiência dos três autores enquanto estagiários docentes nesta disciplina. A proposta lançada consistiu em um exercício etnográfico a ser desenvolvido ao longo do semestre letivo, tendo como eixo temático as “intervenções artísticas urbanas”, no qual os discentes trabalhariam coletivamente no formato de grupos de trabalho, sob a orientação dos estagiários e pesquisadores do Navisual. Como desdobramento de tais experiências, foi produzida uma expografia compartilhada em parceria com o Departamento de Difusão Cultural (DDC/UFRGS) e o projeto UNIFOTO, que ficou exposta na galeria do Hall da Reitoria da UFRGS entre os meses de agosto e setembro de 2016. Destacamos neste trabalho o diálogo e convergências entre três abordagens que percorrem universos empíricos específicos na cidade de Porto Alegre - as Batalhas de MCs, os itinerários e trajetórias de jovens praticantes de skate, e o evento Feira do Hip Hop - propondo uma abordagem imagética em torno do tema das “intervenções artísticas urbanas”, tendo em vista compreender as formas sensíveis através das quais estes sujeitos experienciam, praticam e transformam o viver urbano.Palavras Chaves: Cidade; Imagem; Juventude; Antropologia Visual; Formas Sensíveis.Youth, Image and city: experiences of ethnographic research with urban youngs in Porto AlegreAbstract  This paper is a result of a dialogue between three experiences of collective ethnographic work which have in common the categories of image, youth and city. A group of nine visual ethnographies was carried departed of a partnership of researchers associated with the “Núcleo de Antropologia Visual (NAVISUAL/PPGAS/UFRGS) and the students of the course of Visual Anthropology assign in Social Science under the coordination of Cornelia Eckert. The reflection that we present here go through a process of learning and teaching, based on the experience of the three autors. The proposal launched consisted in a etnographic exercise to be developped alonge the semester, under the bow of a tematic pivot: "urban artistic intervention".As a result of these experiences, a shared exhibition was produced in partnership with the Department of Cultural Diffusion (DDC / UFRGS) and the UNIFOTO project, which was exhibited in the gallery of the Rectory Hall of UFRGS between August and September 2016. We highlight in this work the dialogue and convergences between three approaches that explore specific empirical universes in the city of Porto Alegre - the MCs Battles, the itineraries and trajectories of young skateboarders, and the Hip Hop Fair - proposing an imaging approach around (Sansot, 1983, Ledrut, 1984; Rocha, 1995) through which these subjects experience, practice and transform urban living.Key words: City. Image. Youth. Visual Anthropology. Sensible Forms.     

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