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Encontro entre corpos: um estudo sobre o corpo por meio do diálogo entre a dança: Contato improvisação e a psicanálise winnicottiana; Embodied meeting: a study about body through a dialogue between Contact Improvisation dance and Winnicotts Psychoanalysis

Sanches, Pedro Rodrigo Penuela
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 23/03/2012 PT
Relevância na Pesquisa
45.89%
Este trabalho pretende discutir alguns aspectos fundamentais a respeito das relações entre sujeito e corpo. Para isso, enfocaremos experiências propiciadas por uma proposta de dança contemporânea denominada Contato Improvisação, em um diálogo com os conceitos elaborados pelo psicanalista Donald Winnicott. O Contato Improvisação é uma forma de dança surgida nos anos 1970, nos EUA, baseada em uma proposta de improvisação a partir do contato físico. Essa proposta propicia regimes de relação e comunicação com o outro com matizes e sentidos complexos passando por experiências de indiferenciação e comunicação imediata até experiências de confrontação com a diferença e radical alteridade não somente do outro corpo, mas a alteridade constitutiva do sujeito e da própria corporeidade. O exame destas diferentes experiências nos levará a discutir dimensões da presença da alteridade no processo nunca acabado de constituição do corpo fundamentalmente alimentado pelas experiências ligadas ao universo do brincar, tal como conceituado por Winnicott.; This work aims to discuss some fundamental aspects about the relationship between subject and body. In order to do that, it will focus on experiences opened by Contact Improvisation dance...

Influência da intervenção cinesioterapêutica em tornozelo e pé na biomecânica da marcha de diabéticos neuropatas: um ensaio clínico randomizado; Influence of a Physical Therapy intervention for foot and ankle on gait biomechanics of patients with diabetic polineuropathiy: a randomized controlled trial

Sartor, Cristina Dallemole
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 29/05/2013 PT
Relevância na Pesquisa
36.06%
Este estudo mostra como o rolamento do pé de pacientes com polineuropatia diabética pode ser melhorado com exercícios para pés e tornozelos, visando a recuperação muscular e articular comprometidos pela doença. Um ensaio clínico randomizado, paralelo, com um braço de crossover, e avaliador cego, foi conduzido. Cinquenta e cinco pacientes com polineuropatia diabética foram randomizados e alocados para o grupo controle (n=29) e grupo intervenção (n=26). A intervenção foi aplicada por 12 semanas, 2 vezes por semana, por 40 a 60 minutos cada sessão. As variáveis primárias foram definidas como as que descrevem o rolamento do pé: pressão plantar em seis regiões plantares de interesse. As variáveis secundárias foram a cinética e cinemática de tornozelo no plano sagital, e as medidas clínicas da função de pés e tornozelo (teste de função muscular manual, testes funcionais), de sinais e sintomas da polineuropatia diabética, exame físico dos pés e teste de confiança e equilíbrio em atividades da marcha. Os efeitos de tempo (baseline e 12 semanas), de grupo (controle e intervenção) e de interação foram calculados por meio de ANOVAs casewise 2 fatores, e para as comparações intragrupo do grupo intervenção (baseline...

A comparative study of the physical properties of conventional and Grander-modified adhesive systems

De Paiva Gonçalves, Sérgio Eduardo; Burim, Rafael Augusto; Pleffken, Patrícia Rondon; Barcellos, Daphne Câmara; Gomes, Ana Paula Martins; Huhtala, Maria Filomena Rocha Lima
Fonte: Universidade Estadual Paulista Publicador: Universidade Estadual Paulista
Tipo: Artigo de Revista Científica Formato: 315-320
ENG
Relevância na Pesquisa
36.04%
Purpose: The objective of this study was to evaluate the influence of the Grander technology in reducing the surface tension and contact angle of a self-etch adhesive system. Methods: Distilled water and Xeno III self-etch adhesive system (Dentsply) were modified by physical contact with the Flexible unit Grander system to revitalize water, for 48 hours, resulting in four groups: Group 1 - Xeno III under normal conditions; Group 2 - Xeno III modified by Grander; Group 3 - distilled water under normal conditions; Group 4 - distilled water system modified by the Grander system;. Surface tension and contact angle (dentin substrate and titanium plate) of the adhesive system and water in normal and Grander-modified conditions was measured with a goniometer. Data were analyzed by ANOVA and Tukey test (5%). Results: Grander technology reduced the surface tension of water but not of the adhesive system Xeno III. The contact angle property of the adhesive ystem was not affected. Conclusion: Grander technology did not interfere with the surface tension and contact angle physical properties of the Xeno III self-etch adhesive system. Copyright: © 2011 Gonçalves et al.;.

Modelagem de forças de contato não lineares em mancais de elementos rolantes de contato angular; Modeling of the nonlinear contact forces in rolling element bearings with angular contact

Leticia Bizarre
Fonte: Biblioteca Digital da Unicamp Publicador: Biblioteca Digital da Unicamp
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 04/02/2015 PT
Relevância na Pesquisa
36.03%
Com a necessidade da diminuição do tempo de projeto, a utilização de modelos computacionais para simulação de componentes constitui fase fundamental no projeto preliminar de máquinas e equipamentos e permite avaliar parâmetros de projeto para minimizar testes físicos em protótipos. Dentro deste contexto, o trabalho aqui apresentado segue dando continuidade à modelagem de mancais de elementos rolantes, neste caso esferas, anteriormente desenvolvido para contato puramente radial. O estudo da dinâmica de mancais de elementos rolantes e a compreensão de sua modelagem computacional permitem conhecer sua influência sobre o sistema completo. Será inserido o modelo de lubrificação Elastohidrodinâmica (EHD) no modelo dinâmico do mancal, permitindo obter parâmetros equivalentes de rigidez e amortecimento, para posterior caracterização do mancal, utilizando uma análise no domínio do tempo. Uma vez estimada a distribuição de forças, são calculados parâmetros de carga e lubrificação, bem como a geometria no contato, os quais são utilizados no modelo EHD. Este último contém a soluçãodas equações que descrevem o comportamento da região lubrificada, empregando o método numérico de multi-níveis. Desta forma...

On the contact detection for contact-impact analysis in multibody systems

Flores, Paulo; Ambrósio, Jorge
Fonte: Springer Publicador: Springer
Tipo: Artigo de Revista Científica
Publicado em //2010 ENG
Relevância na Pesquisa
36.07%
One of the most important and complex parts of the simulation of multibody systems with contact-impact involves the detection of the precise instant of impact. In general, the periods of contact are very small and, therefore, the selection of the time step for the integration of the time derivatives of the state variables plays a crucial role in the dynamics of multibody systems. The conservative approach is to use very small time steps throughout the analysis. However, this solution is not efficient from the computational view point. When variable time step integration algorithms are used and the pre-impact dynamics does not involve high-frequencies the integration algorithms may use larger time steps and the contact between two surfaces may start with initial penetrations that are artificially high. This fact leads either to a stall of the integration algorithm or to contact forces that are physically impossible which, in turn, lead to post-impact dynamics that is unrelated to the physical problem. The main purpose of this work is to present a general and comprehensive approach to automatically adjust the time step, in variable time step integration algorithms, in the vicinity of contact of multibody systems. The proposed methodology ensures that for any impact in a multibody system the time step of the integration is such that any initial penetration is below any prescribed threshold. In the case of the start of contact...

Relações entre raiva, agressividade, ansiedade e percepção de ameaça na competição desportiva : um estudo em diferentes modalidades de contacto físico; Relationship between anger, agression, anxiety and threat perception in competitive sport : a study in different physical contact sports

Sofia, Rui M.; Cruz, José Fernando A.
Fonte: Universidade do Porto. Faculdade de Desporto Publicador: Universidade do Porto. Faculdade de Desporto
Tipo: Artigo de Revista Científica
Publicado em /10/2013 POR
Relevância na Pesquisa
45.84%
Apesar da raiva ser uma das emoções mais relevantes em competição, ainda poucos estudos se dedicaram a esta emoção. Deste modo, o presente estudo pretendeu compreender e analisar, em modalidades desportivas com diferentes níveis de contacto físico, as relações entre a percepção de ameaça subjacente à experiencia de stress e ansiedade, raiva e agressividade. Os 121 atletas de ambos os sexos que participaram na investigação, com idades compreendidas entre os 14 e os 32 anos, distribuíam-se por três modalidades distintas: autodefesa, kickboxing e futebol. Foram administradas as seguintes medidas psicológicas (versões traduzidas e/ou adaptadas): a) Escala de Avaliação Cognitiva da Competição Desportiva – Percepção de Ameaça; b) Escala de Agressividade e Raiva Competitiva; e c) Escala de Ansiedade Competitiva – 2. Os resultados sugerem associações positivas entre as dimensões cognitivas da ansiedade e a raiva, e entre a ansiedade e percepção de ameaça. Verificou-se, ainda, que a ansiedade tende a ser menor em modalidades colectivas, mas a raiva e a agressividade tendem a ser mais elevadas. Além disso, atletas do sexo feminino tendem a evidenciar níveis mais elevados de ansiedade somática e menores de raiva e agressividade. Serão ainda sugeridas algumas implicações práticas para o estudo da raiva no desporto.; Despite anger being one of the most relevant emotions in sport competition...

A comparative study of the physical properties of conventional and Grander-modified adhesive systems

Gonçalves,Sérgio Eduardo de Paiva; Burim,Rafael Augusto; Pleffken,Patrícia Rondon; Barcellos,Daphne Câmara; Gomes,Ana Paula Martins; Huhtala,Maria Filomena Rocha Lima
Fonte: Pontifícia Universidade Católica do Rio Grande do Sul Publicador: Pontifícia Universidade Católica do Rio Grande do Sul
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/01/2011 EN
Relevância na Pesquisa
36.04%
PURPOSE: The objective of this study was to evaluate the influence of the Grander technology in reducing the surface tension and contact angle of a self-etch adhesive system. METHODS: Distilled water and Xeno III self-etch adhesive system (Dentsply) were modified by physical contact with the Flexible unit Grander system to revitalize water, for 48 hours, resulting in four groups: Group 1 - Xeno III under normal conditions; Group 2 - Xeno III modified by Grander; Group 3 - distilled water under normal conditions; Group 4 - distilled water system modified by the Grander system;. Surface tension and contact angle (dentin substrate and titanium plate) of the adhesive system and water in normal and Grander-modified conditions was measured with a goniometer. Data were analyzed by ANOVA and Tukey test (5%). RESULTS: Grander technology reduced the surface tension of water but not of the adhesive system Xeno III. The contact angle property of the adhesive ystem was not affected. CONCLUSION: Grander technology did not interfere with the surface tension and contact angle physical properties of the Xeno III self-etch adhesive system.

The nucleotides responsible for the direct physical contact between the chromatin insulator protein CTCF and the H19 imprinting control region manifest parent of origin-specific long-distance insulation and methylation-free domains

Pant, Vinod; Mariano, Piero; Kanduri, Chandrasekhar; Mattsson, Anita; Lobanenkov, Victor; Heuchel, Rainer; Ohlsson, Rolf
Fonte: Cold Spring Harbor Laboratory Press Publicador: Cold Spring Harbor Laboratory Press
Tipo: Artigo de Revista Científica
Publicado em 01/03/2003 EN
Relevância na Pesquisa
45.84%
The repression of the maternally inherited Igf2 allele has been proposed to depend on a methylation-sensitive chromatin insulator organized by the 11 zinc finger protein CTCF at the H19 imprinting control region (ICR). Here we document that point mutations of the nucleotides in physical contact with CTCF within the endogenous H19 ICR lead to loss of CTCF binding and Igf2 imprinting only when passaged through the female germline. This effect is accompanied by a significant loss of methylation protection of the maternally derived H19 ICR. Because CTCF interacts with other imprinting control regions, it emerges as a central factor responsible for interpreting and propagating gamete-derived epigenetic marks and for organizing epigenetically controlled expression domains.

Do human figure diagrams help alleged victims of sexual abuse provide elaborate and clear accounts of physical contact with alleged perpetrators?

Teoh, Yee-San; Yang, Pei-Jung; Lamb, Michael E.; Larsson, Anneli S.
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
Publicado em 01/02/2010 EN
Relevância na Pesquisa
45.84%
The present study examined whether the use of human figure diagrams within a well-structured interview was associated with more elaborate and clearer accounts about physical contact that had occurred in the course of an alleged abuse. The sample included investigative interviews of 88 children ranging from 4 to 13 years of age. Children were interviewed using the NICHD Investigative Interview Protocol, and were then asked a series of questions in association with unclothed gender-neutral outline diagrams of a human body. A new coding scheme was developed to examine the types and clarity of touch-related information. Use of the HFDs was associated with reports of new touches not mentioned before and elaborations regarding the body parts reportedly touched. The HFDs especially helped clarify reports by the oldest rather than the youngest children. The clarity of children’s accounts of touch was also greater when details were sought using recall prompts.

Keratinocyte proximity and contact can play a significant role in determining mesenchymal stem cell fate in human tissue

Sivamani, Raja K.; Schwartz, Michael P.; Anseth, Kristi S.; Isseroff, R. Rivkah
Fonte: Federation of American Societies for Experimental Biology Publicador: Federation of American Societies for Experimental Biology
Tipo: Artigo de Revista Científica
Publicado em /01/2011 EN
Relevância na Pesquisa
36.03%
Bone marrow-derived human mesenchymal stem cells (hMSCs) possess multipotent differentiation capabilities and are a potent source of paracrine factors. We show how the epidermal keratinocyte can direct hMSC differentiation selectively. Keratinocytes and hMSCs were either cocultured in physical contact (contact cocultures), or separated without physical contact using a transwell insert (noncontact cocultures). We also delivered hMSCs into an ex vivo human excisional wound where subpopulations of the hMSCs were either in contact or were physically separated from the epidermal keratinocytes. In comparison to control hMSCs that were not cocultured, contact cocultured hMSCs adopted an epithelial morphology and expressed keratinocyte markers while noncontact coculutred hMSCs, surprisingly, adopted phenotypes that resembled myofibroblast and early neural lineage, both of which are of dermal origin. Cell fusion was not a requirement in in vitro contact cocultures, as determined by fluorescence-activated cell sorting (FACS) and fluorescence in situ hybridization analysis (FISH). To the best of our knowledge, this work provides the first example of hMSC differentiation into different lineages depending on their proximity to a single cell type.—Sivamani...

Comparing the relative benefits of grooming-contact and full-contact pairing for laboratory-housed adult female Macaca fascicularis

Lee, Grace H.; Thom, Jinhee P.; Chu, Katherine L.; Crockett, Carolyn M.
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
36%
Tactile social contact is the most effective form of environmental enrichment for promoting normal behavior in captive primates. For laboratory macaques housed indoors, pair housing is the most common method for socialization. Pairs can be housed either in full contact (FC), or in protected contact (PC). At Washington National Primate Research Center, PC is provided by grooming-contact (GC) cages whereby two partners are housed individually in adjacent cages with access to each other through widely spaced vertical bars. Grooming-contact has been used to accommodate research protocol restrictions and improve the likelihood of compatibility for various pairings, in part by enabling male-female pairs. This study compares the benefits between the two housing types by video recording 14 pairs of adult female Macaca fascicularis in four sequential housing phases following an ABBA design: baseline grooming-contact, full contact shortly after introduction, 1-month-later full contact, and after reversion to grooming-contact. Prior to this study, pairs had been housed compatibly in GC. Twelve of the 14 long-term pairs transitioned successfully to full contact and data presented exclude the two failed pairs. Allogrooming increased significantly when pairs first switched from GC to FC (P = 0.018)...

The Physical Interaction of Myoblasts with the Microenvironment during Remodeling of the Cytoarchitecture

Modulevsky, Daniel J.; Tremblay, Dominique; Gullekson, Corinne; Bukoresthliev, Nickolay V.; Pelling, Andrew E.
Fonte: Public Library of Science Publicador: Public Library of Science
Tipo: Artigo de Revista Científica
Publicado em 18/09/2012 EN
Relevância na Pesquisa
36.1%
Integrins, focal adhesions, the cytoskeleton and the extracellular matrix, form a structural continuum between the external and internal environment of the cell and mediate the pathways associated with cellular mechanosensitivity and mechanotransduction. This continuum is important for the onset of muscle tissue generation, as muscle precursor cells (myoblasts) require a mechanical stimulus to initiate myogenesis. The ability to sense a mechanical cue requires an intact cytoskeleton and strong physical contact and adhesion to the microenvironment. Importantly, myoblasts also undergo reorientation, alignment and large scale remodeling of the cytoskeleton when they experience mechanical stretch and compression in muscle tissue. It remains unclear if such dramatic changes in cell architecture also inhibit physical contact and adhesion with the tissue microenvironment that are clearly important to myoblast physiology. In this study, we employed interference reflection microscopy to examine changes in the close physical contact of myoblasts with a substrate during induced remodeling of the cytoarchitecture (de-stabilization of the actin and microtubule cytoskeleton and inhibition of acto-myosin contractility). Our results demonstrate that while each remodeling pathway caused distinct effects on myoblast morphology and sub-cellular structure...

Limited physical contact through a mesh barrier is sufficient for social reward-conditioned place preference in adolescent male rats

Peartree, Natalie A.; Hood, Lauren E.; Thiel, Kenneth J.; Sanabria, Federico; Pentkowski, Nathan S.; Chandler, Kayla N.; Neisewander, Janet L.
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
46.18%
Adolescence is a period of enhanced sensitivity to social influences and vulnerability to drug abuse. Social reward in adolescent rats has been demonstrated with the conditioned place preference (CPP) model, but it is not clear whether limited contact with another rat without play is sufficient to produce reward. We investigated this issue using an apparatus containing two main compartments each with a wire mesh barrier that allowed rats placed on either side of the barrier to have limited physical contact. Adolescent male rats were given two conditioning sessions/day for 2 or 8 days following baseline preference tests. Rats were placed into their preferred side alone for one daily 10-min session and into their initially non-preferred side (i.e., CS) for the other session during which they either had restricted or unrestricted physical access to another rat (Rat/Mesh or Rat/Phys, respectively) or to a tennis ball (Ball/Mesh or Ball/Phys, respectively) unconditioned stimulus (US). Only the Rat/Phys group exhibited CPP after 2 CS-US pairings; however, after 8 CS-US pairings, the Rat/Mesh and Ball/Phys groups also exhibited CPP. During conditioning, the rat US elicited more robust approach and contact behavior compared to the ball, regardless of physical or restricted access. The incidence of contact and/or approach increased as the number of exposures increased. The results suggest that the rank order of US reward efficacy was physical contact with a rat > limited contact with a rat > physical contact with a ball...

INSIGHTS INTO THE LIVED EXPERIENCES OF THREE MALE ELEMENTARY SCHOOL TEACHERS

Cota, Arthur
Fonte: Quens University Publicador: Quens University
Tipo: Project
EN
Relevância na Pesquisa
46.04%
The purpose of the present study was to understand the lived experiences of three male elementary teachers working at the Kindergarten to Grade 4 level in a single school district in northwestern Alberta. The study investigated how the participants saw their roles as male elementary teachers, the work-related challenges they faced, and how they responded to those challenges. Three male teachers with single-grade assignments ranging from Grade 2 to Grade 4 participated in the study. The participants were asked to reflect on various aspects of their experiences of teaching in the traditionally female-dominated profession of elementary education. Data were collected through individual interviews with each participant between May 2011 and June 2011. Data were analyzed with respect to the participants’ approaches to physical contact with students, their attitudes about role modelling, and their perspectives on men in elementary education. Andrew, Brian, and Peter had various degrees of physical contact with their young students with most of the physical contact in all three participants’ classrooms being initiated by students. All three participants saw role modelling as an important task for male elementary teachers; however, they tended to model socially acceptable human behaviour for all students rather than attempting to serve as “father figures” who modelled stereotypically male attributes for male students to emulate. Finally...

Numerical Simulation of Frictional Contact Problems using Nagata Patches in Surface Smoothing

Neto, Diogo Mariano Simões
Fonte: Universidade de Coimbra Publicador: Universidade de Coimbra
Tipo: Tese de Doutorado
ENG
Relevância na Pesquisa
36.01%
All movements in the world involve contact and friction, from walking to car driving. The contact mechanics has application in many engineering problems, including the connection of structural members by bolts or screws, design of gears and bearings, sheet metal or bulk forming, rolling contact of car tyres, crash analysis of structures, as well as prosthetics in biomedical engineering. Due to the nonlinear and non-smooth nature of contact mechanics (contact area is not known a priori), such problems are currently solved using the finite element method within the field of computational contact mechanics. However, most of the commercial finite element software packages presently available are not entirely capable to solve frictional contact problems, demanding for efficient and robust methods. Therefore, the main objective of this study is the development of algorithms and numerical methods to apply in the numerical simulation of 3D frictional contact problems between bodies undergoing large deformations. The presented original developments are implemented in the in-house finite element code DD3IMP. The formulation of quasi-static frictional contact problems between bodies undergoing large deformations is firstly presented in the framework of the continuum mechanics...

Affectionate Contact and Theory of Mind Abilities of Parent-Child Dyads

Christopher, Anastasia
Fonte: Quens University Publicador: Quens University
Tipo: Tese de Doutorado
EN; EN
Relevância na Pesquisa
45.94%
This study was conducted to investigate the extent to which affectionate physical contact (i.e., cuddling) affects preschoolers’ and parents’ abilities to engage in theory-of-mind reasoning. We explored the hypothesis that if affectionate contact affected theory-of-mind, then preschoolers and parents who cuddled would outperform those who did not. To test this hypothesis, we recruited 44 preschool aged children (3.8-4.6-year-olds) and their primary caregivers. We found that children who cuddled with their primary caregiver during a storybook reading task performed significantly better on theory-of-mind tasks compared to children who did not receive a cuddle. Importantly, our findings support the contention that affectionate contact affected children’s performance on theory-of-mind related tasks specifically, but not performance on executive functioning or non-mental representation tasks. A secondary goal of this study was to explore whether any effects of affectionate contact would be mediated by functional polymorphisms of the oxytocin receptor gene (OXTR). Although we were unable to obtain a sample size that was sufficient to directly test this hypothesis, we found that parents homozygous for the G allele at rs2254298 were significantly better at decoding the affective mental states of others compared to those who carried at least one A allele. Thus...

Indicadores físicos e mecânicos do solo sob cultivo de cana-de-açúcar em áreas comerciais; Physical and mechanical indicators of soil under sugarcane cultivation in commercials areas

Oswaldo Julio Vischi Filho
Fonte: Biblioteca Digital da Unicamp Publicador: Biblioteca Digital da Unicamp
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 05/12/2014 PT
Relevância na Pesquisa
36.06%
O Brasil é o maior produtor mundial de açúcar e o segundo de álcool e para tanto possui mais de 10 milhões de hectares explorados com cana-de-açúcar. Houve a necessidade de modernizar o setor preparando as áreas de produção para a colheita mecanizada de cana crua. Este sistema visando a maior mecanização das etapas de produção, com ênfase para a colheita, promove o tráfego intenso das máquinas sobre o solo, resultando na sua compactação. Indicadores do processo de compactação derivados da curva de compressão e do intervalo hídrico ótimo do solo podem ser influenciados diferenciadamente pelo sistema de manejo. O trabalho teve como objetivo avaliar os ciclos de uso do solo cultivado com cana-de-açúcar utilizando indicadores de qualidade estrutural do solo em função da pressão de pré-consolidação e do intervalo hídrico ótimo do solo que possibilitem diagnosticar o comportamento estrutural dos mesmos com diferentes épocas de implantação e classes texturais. O experimento foi desenvolvido na usina São Martinho, município de Pradópolis, SP, em lavoura comercial de cana-de-açúcar, em quatro áreas distintas sobre Latossolo Vermelho, com duas classes texturais (argilosa e média), em sistemas com seis e dezoito anos de colheita mecanizada. O delineamento experimental foi o inteiramente casualizado em esquema fatorial...

Physical contact influences how much people pay at celebrity auctions

Newman, George E.; Bloom, Paul
Fonte: National Academy of Sciences Publicador: National Academy of Sciences
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
45.96%
Contagion is a form of magical thinking in which people believe that a person's immaterial qualities or essence can be transferred to an object through physical contact. Our paper provides unique evidence for the influence of contagion beliefs in an actual market context. We analyze several high-profile celebrity auctions and demonstrate that the degree of perceived physical contact that a celebrity has with an item influences the amount of money that collectors are willing to pay for it at auction. This effect does not appear to be accounted for in preauction estimates. Therefore, our paper is unique in suggesting the existence of contagion effects outside of the laboratory using consequential purchase decisions.

Protocol for Get Moving: a randomised controlled trial to assess the effectiveness of three minimal contact interventions to promote fitness and physical activity in working adults

Cooper, Andrew J. M.; Dearnley, Katie; Williams, Kate M.; Sharp, Stephen; van Sluijs, Esther M. F.; Brage, S?ren; Sutton, Stephen; Griffin, Simon J.
Fonte: BioMed Central Publicador: BioMed Central
Tipo: Article; published version
EN
Relevância na Pesquisa
36.07%
This is the published version. It first appeared at http://www.biomedcentral.com/1471-2458/15/296/abstract.; Background Web-based interventions for physical activity offer several advantages over face-to-face, print-and telephone-based interventions and are scalable and potentially cost-effective. Recent reviews of web-based interventions in adults show that they have positive but small effects on physical activity but identify a number of limitations including a reliance on selfreport measures of outcome. This trial used an objective measure of physical activity to assess the effectiveness of three minimal contact interventions: 1) A multi-component webbased intervention incorporating objective monitoring and graphical feedback of physical activity; 2) A version of the first intervention that consisted only of objective monitoring plus web-based graphical feedback; and 3) Self-monitoring of physical activity using a paper diary. Methods/design Get Moving is an individually randomised controlled trial with allocation of 488 participants to one of three interventions or to a no-intervention control group. Participants are physically inactive working adults aged 18?65 years. They attended a baseline assessment session at which anthropometric...

Physical Properties of Nanobubbles on Hydrophobic Surfaces in Water and Aqueous Solutions

Zhang, Xuehua; Maeda, Nobuo; Craig, Vincent
Fonte: American Chemical Society Publicador: American Chemical Society
Tipo: Artigo de Revista Científica
Relevância na Pesquisa
36.04%
In recent years there has been an accumulation of evidence for the existence of nanobubbles on hydrophobic surfaces in water, despite predictions that such small bubbles should rapidly dissolve because of the high internal pressure associated with the interfacial curvature and the resulting increase in gas solubility. Nanobubbles are of interest among surface scientists because of their potential importance in the long-range hydrophobic attraction, microfluidics, and adsorption at hydrophobic surfaces. Here we employ recently developed techniques designed to induce nanobubbles, coupled with high-resolution tapping-mode atomic force microscopy (TM-AFM) to measure some of the physical properties of nanobubbles in a reliable and repeatable manner. We have reproduced the earlier findings reported by Hu and co-workers. We have also studied the effect of a wide range of solutes on the stability and morphology of these deliberately formed nanobubbles, including monovalent and multivalent salts, cationic, anionic, and nonionic surfactants, as well as solution pH. The measured physical properties of these nanobubbles are in broad agreement with those of macroscopic bubbles, with one notable exception: the contact angle. The nanobubble contact angle (measured through the denser aqueous phase) was found to be much larger than the macroscopic contact angle on the same substrate. The larger contact angle results in a larger radius of curvature and a commensurate decrease in the Laplace pressure. These findings provide further evidence that nanobubbles can be formed in water under some conditions. Once formed...