Linear Stability Analysis for Plane-Poiseuille Flow of an Elastoviscoplastic fluid with internal microstructure

We study the linear stability of Plane Poiseuille flow of an elastoviscoplastic fluid using a revised version of the model proposed by Putz and Burghelea (Rheol. Acta (2009)48:673-689). The evolution of the microstructure upon a gradual increase of the external forcing is governed by a structural variable (the concentration of solid material elements) which decays smoothly from unity to zero as the stresses are gradually increased beyond the yield point. Stability results are in close conformity with the ones of a pseudo-plastic fluid. Destabilizing effects are related to the presence of an intermediate transition zone where elastic solid elements coexist with fluid elements. This region brings an elastic contribution which does modify the stability of the flow

Recurrent Modification of a Conserved Cis-Regulatory Element Underlies Fruit Fly Pigmentation Diversity

The development of morphological traits occurs through the collective action of networks of genes connected at the level of gene expression. As any node in a network may be a target of evolutionary change, the recurrent targeting of the same node would indicate that the path of evolution is biased for the relevant trait and network. Although examples of parallel evolution have implicated recurrent modification of the same gene and cis-regulatory element (CRE), little is known about the mutational and molecular paths of parallel CRE evolution. In Drosophila melanogaster fruit flies, the Bric-à-brac (Bab) transcription factors control the development of a suite of sexually dimorphic traits on the posterior abdomen. Female-specific Bab expression is regulated by the dimorphic element, a CRE that possesses direct inputs from body plan (ABD-B) and sex-determination (DSX) transcription factors. Here, we find that the recurrent evolutionary modification of this CRE underlies both intraspecific and interspecific variation in female pigmentation in the melanogaster species group. By reconstructing the sequence and regulatory activity of the ancestral Drosophila melanogaster dimorphic element, we demonstrate that a handful of mutations were sufficient to create independent CRE alleles with differing activities. Moreover, intraspecific and interspecific dimorphic element evolution proceeded with little to no alterations to the known body plan and sex-determination regulatory linkages. Collectively, our findings represent an example where the paths of evolution appear biased to a specific CRE, and drastic changes in function were accompanied by deep conservation of key regulatory linkages. © 2013 Rogers et al

The Service Environment: Functional or Fun, Does it Matter?

Purpose: The purpose of this editorial is to introduce the reader to three papers discussing the role of atmospherics within predominantly hedonic service settings. Design/methodology/approach: This editorial introduces the papers in this special section. Findings: Atmospherics plays a significant role in determining how consumers and patrons perceive and interpret hedonic services. Originality/value: The first study examines how atmospherics can impact the overall meanings patrons attach to visiting a hedonic facilities. The second study looks at the role of promotional materials on setting the tone for fringe festivals. The third study investigates the role of atmospherics in green consumerism

Vergleich zwischen Photo- und Hadroproduktion von rho0-Mesonen am CERN-OMEGA-Spektrometer

SIGLEAvailable from Bonn Univ. (DE). Physikalisches Inst. / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

The Service Environment: Functional or Fun, Does it Matter?

Purpose: The purpose of this editorial is to introduce the reader to three papers discussing the role of atmospherics within predominantly hedonic service settings. Design/methodology/approach: This editorial introduces the papers in this special section. Findings: Atmospherics plays a significant role in determining how consumers and patrons perceive and interpret hedonic services. Originality/value: The first study examines how atmospherics can impact the overall meanings patrons attach to visiting a hedonic facilities. The second study looks at the role of promotional materials on setting the tone for fringe festivals. The third study investigates the role of atmospherics in green consumerism

Contact line of adsorbed colloid-polymer droplets in theory and experiment

The contact line between the colloid-rich bulk liquid and an adsorbed thin film in colloid-polymer mixtures (CPM) is studied by means of an interface displacement model. The interface displacement profiles are compared to laser scanning confocal microscopy (LSCM) images. The mixtures consist of poly(methylmetacrylate) (PMMA) colloids and polystyrene (PS) polymers with polymer-to-colloid size ratio q = 1.18. Based on the experimental parameters, the theoretical model predicts a contact angle for colloid-rich liquid droplets adsorbed on glass of θ∞ = 59°, assuming a contact line with infinite radius, R = ∞. When a contact-line curvature correction and a correction for the protein-limit character of the CPM are taken into account, a modest shift is obtained. The refined theory predicts θ≈ 56°. The contact angle determined visually from the LSCM images is θ≈ 30°. The model predicts a three-phase contact-line tension of τ = -1.2 × 10(-12) N (uncorrected) and τ = -2.3 × 10(-13) N (with protein-limit correction), which is physically sound both in sign and magnitude. The line tension influences the contact angle to a small extent due to the contact line curvature. The predicted width of the transition zone between the thin film and the droplet is about 2 μm. The effect of gravity is noticeable as a deformation near the middle of the droplet.crosscheck: This document is CrossCheck deposited copyright_licence: The Royal Society of Chemistry has an exclusive publication licence for this journal history: Received 9 December 2015; Accepted 21 March 2016; Accepted Manuscript published 22 March 2016; Advance Article published 31 March 2016; Version of Record published 27 April 2016status: publishe

Conversion of the defense industry in Russia and Eastern Europe: proceedings of the BICC/CISAC workshop on conversion, 10 - 13 August 1994

SIGLEAvailable from Bibliothek des Instituts fuer Weltwirtschaft, ZBW, Duesternbrook Weg 120, D-24105 Kiel C 201862 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

The Role of the Physical Service Environment on Symbolic Meaning Evaluations in Hedonic Service Industries

Purpose: The purpose of this research is to examine the impact of atmospherics on consumer symbolic interpretations, and various psychological outcomes in a purely hedonic service environment. Design/methodology/approach: Field data were collected from 500 respondents in Florida across four hedonic service attraction sites and then analyzed using MANOVA in SPSS. A mediation method proposed by Baron and Kenny is utilized to determine the mediating role of consumer symbolic interpretations in the nomological network. Findings: There were four major findings. First, similar to other service sectors, environmental factors do play a critical role in determining behavioral intentions in hedonic services. Second, patrons conceptualize hedonic attractions/services in terms of both utilitarian and hedonic components. Third, consumer symbolic perceptions (meanings) do affect behavioral intentions. Finally, consumers do evaluate their service environments (ambient, design and layout and social factors) differently depending on the meanings they attach to a service environment. Research limitations/implications: Managers can tailor service environments to match the symbolic interpretations and behavioral outcomes they would like to foster in order to maximize monies spent on physical upgrades. Additional work is needed in the area of consumer meanings and symbolic interpretations. Originality/value: The study indicates that the service environment can be used as a differentiating tool to perpetuate brand meaning and uniqueness in the minds of the consumer, thereby creating a competitive advantage for the hedonic facilities and by extension ensuring repeat patronage