The dynamic models of consumers’ symbolic needs: in the context of restaurant brands

Purpose: The purpose of this paper is to investigate the dynamic process and the meaning of symbolic consumption according to the three symbolic needs (i.e. status needs, social needs, status and social needs) to understand how symbolic messages are conveyed when consumers choose a brand.Design/methodology/approach: This paper develops three dynamic models, categorized according to the consumers’ needs. The conceptual framework consists of the six constructs: collectivism/individualism, brand reputation, self-congruence, brand affect, brand identification and brand loyalty. Twelve hypotheses were developed and tested. Data were collected from consumers who had experienced well-known global chain restaurant brands. The three models were tested using confirmatory factor analysis and structural equation modelling.Findings: Findings highlight the important mediating role of brand affect in symbolic consumption, which previously has not been revealed empirically. Moreover, it is found that self-congruence does not mediate the relationship between brand reputation, collectivism/individualism and brand affect, despite its prominence in previous symbolic consumption studies. In the status and social needs models, brand reputation mediates between collectivism/individualism and self-congruence, brand identification, brand affect and brand loyalty.Originality/value: This is the first empirical paper to investigate symbolic consumption in the context of three types of models, according to symbolic needs, in the context of restaurant consumption. The study also identifies the major components of the consumer’s symbolic needs based on the attributes of symbolic consumption. Moreover, this study reveals that when both social needs and status needs are mixed, a hierarchy exists between consumers’ symbolic needs. Finally, the study makes an important contribution to the literature by applying the concept of brand affect to symbolic consumption research and exploring the relationships between the external motivational factors and the internal elements of symbolic consumption

Line Patterns in Free Groups

We study line patterns in a free group by considering the topology of the decomposition space, a quotient of the boundary at infinity of the free group related to the line pattern. We show that the group of quasi-isometries preserving a line pattern in a free group acts by isometries on a related space if and only if there are no cut pairs in the decomposition space.Comment: 35 pages, 22 figures, PDFLatex; v2. finite index requires extra hypothesis; v3. 37 pages, 24 figures: updated references and add example in Section 6.3 of a rigid pattern for which the free group is not finite index in the group of pattern preserving quasi-isometries; v4. 40 pages, 26 figures: improved exposition and add example in Section 6.4 of a rigid pattern whose cube complex is not a tre

Slender-ribbon theory

Ribbons are long narrow strips possessing three distinct material length scales (thickness, width, and length) which allow them to produce unique shapes unobtainable by wires or filaments. For example when a ribbon has half a twist and is bent into a circle it produces a M\"obius strip. Significant effort has gone into determining the structural shapes of ribbons but less is know about their behavior in viscous fluids. In this paper we determine, asymptotically, the leading-order hydrodynamic behavior of a slender ribbon in Stokes flows. The derivation, reminiscent of slender-body theory for filaments, assumes that the length of the ribbon is much larger than its width, which itself is much larger than its thickness. The final result is an integral equation for the force density on a mathematical ruled surface, termed the ribbon plane, located inside the ribbon. A numerical implementation of our derivation shows good agreement with the known hydrodynamics of long flat ellipsoids, and successfully captures the swimming behavior of artificial microscopic swimmers recently explored experimentally. We also study the asymptotic behavior of a ribbon bent into a helix, that of a twisted ellipsoid, and we investigate how accurately the hydrodynamics of a ribbon can be effectively captured by that of a slender filament. Our asymptotic results provide the fundamental framework necessary to predict the behavior of slender ribbons at low Reynolds numbers in a variety of biological and engineering problems.This research was funded in part by the European Union through a Marie Curie CIG Grant and the Cambridge Trusts.This is the author accepted manuscript. The final version is available from American Institute of Physics via http://dx.doi.org/10.1063/1.493856

Принцип разума

Academician Vladimir Ivanovich Vernadsky, and his contemporary, Albert Einstein, situated the summation of their greatest scientific achievements within that Riemannian concept of dynamics which is traced, formally, in modern science, from Gottfried Leibniz’s 1690s resurrection of that concept of dynamis known to the Classical Greek of the Pythagoreans and Plato. As Einstein emphasized, the relevance of this for the presently known foundations of competent modern science, is expressed in that uniquely original discovery of the general principle of gravitation by Johannes Kepler, as in Kepler’s The Harmonies of the World. When our attention is turned to include the subject of certain related, deeper implications concerning the human mind, implications which are prompted from within Vernadsky’s treatment of the Noösphere, a certain, implicitly very important, but presently still controversial question is posed. That subject is to be identified as a topic within the framework of a unified field theory. Albert Einstein posed the question, and Academician Vernadsky, whether one presumes that he knew it, or not, supplied a crucial clue which leads in the direction of the solution. That is the subject here.Академик Владимир Иванович Вернадский и его современник Альберт Эйнштейн рассматривали свои величайшие научные достижения в рамках римановского понятия динамики, которое явно прослеживается в современной науке от возрождения Готфридом Лейбницем понятия «дюнамис», известного еще в классическом греческом языке Платона и последователей Пифагора. Как отмечал сам Эйнштейн, его значение для известных в настоящее время базовых положений современной науки проявляется в оригинальном открытии общего принципа тяготения Иоганнесом Кеплером, как это было изложено в работе последнего «Гармония мира» (Harmonices Mundi). Обращаясь к предмету определенных смежных, более глубоких последствий, связанных с человеческим разумом и вытекающих из учения Вернадского о ноосфере, нам приходится иметь дело с очень важным, но все еще спорным вопросом

Peak reduction technique in commutative algebra

The "peak reduction" method is a powerful combinatorial technique with applications in many different areas of mathematics as well as theoretical computer science. It was introduced by Whitehead, a famous topologist and group theorist, who used it to solve an important algorithmic problem concerning automorphisms of a free group. Since then, this method was used to solve numerous problems in group theory, topology, combinatorics, and probably in some other areas as well. In this paper, we give a survey of what seems to be the first applications of the peak reduction technique in commutative algebra and affine algebraic geometry.Comment: survey; 10 page

Primitive Words, Free Factors and Measure Preservation

Let F_k be the free group on k generators. A word w \in F_k is called primitive if it belongs to some basis of F_k. We investigate two criteria for primitivity, and consider more generally, subgroups of F_k which are free factors. The first criterion is graph-theoretic and uses Stallings core graphs: given subgroups of finite rank H \le J \le F_k we present a simple procedure to determine whether H is a free factor of J. This yields, in particular, a procedure to determine whether a given element in F_k is primitive. Again let w \in F_k and consider the word map w:G x G x ... x G \to G (from the direct product of k copies of G to G), where G is an arbitrary finite group. We call w measure preserving if given uniform measure on G x G x ... x G, w induces uniform measure on G (for every finite G). This is the second criterion we investigate: it is not hard to see that primitivity implies measure preservation and it was conjectured that the two properties are equivalent. Our combinatorial approach to primitivity allows us to make progress on this problem and in particular prove the conjecture for k=2. It was asked whether the primitive elements of F_k form a closed set in the profinite topology of free groups. Our results provide a positive answer for F_2.Comment: This is a unified version of two manuscripts: "On Primitive words I: A New Algorithm", and "On Primitive Words II: Measure Preservation". 42 pages, 14 figures. Some parts of the paper reorganized towards publication in the Israel J. of Mat

Probing small-x parton densities in proton- proton (-nucleus) collisions in the very forward direction

We present calculations of several pp scattering cross sections with potential applications at the LHC. Significantly large rates for momentum fraction, x, as low as 10^-7 are obtained, allowing for possible extraction of quark and gluon densities in the proton and nuclei down to these small x values provided a detector with good acceptance at maximal rapidities is used.Comment: 14 pages, LaTeX, 12 figures, uses revtex.st

Global axisymmetric stability analysis for a composite system of two gravitationally coupled scale-free discs

In a composite system of gravitationally coupled stellar and gaseous discs, we perform linear stability analysis for axisymmetric coplanar perturbations using the two-fluid formalism. The background stellar and gaseous discs are taken to be scale-free with all physical variables varying as powers of cylindrical radius $r$ with compatible exponents. The unstable modes set in as neutral modes or stationary perturbation configurations with angular frequency $\omega=0$.Comment: 7 pages using AAS styl

Ethanol reversal of tolerance to the respiratory depressant effects of morphine

Opioids are the most common drugs associated with unintentional drug overdose. Death results from respiratory depression. Prolonged use of opioids results in the development of tolerance but the degree of tolerance is thought to vary between different effects of the drugs. Many opioid addicts regularly consume alcohol (ethanol), and post-mortem analyses of opioid overdose deaths have revealed an inverse correlation between blood morphine and ethanol levels. In the present study, we determined whether ethanol reduced tolerance to the respiratory depressant effects of opioids. Mice were treated with opioids (morphine, methadone, or buprenorphine) for up to 6 days. Respiration was measured in freely moving animals breathing 5% CO(2) in air in plethysmograph chambers. Antinociception (analgesia) was measured as the latency to remove the tail from a thermal stimulus. Opioid tolerance was assessed by measuring the response to a challenge dose of morphine (10 mg/kg i.p.). Tolerance developed to the respiratory depressant effect of morphine but at a slower rate than tolerance to its antinociceptive effect. A low dose of ethanol (0.3 mg/kg) alone did not depress respiration but in prolonged morphine-treated animals respiratory depression was observed when ethanol was co-administered with the morphine challenge. Ethanol did not alter the brain levels of morphine. In contrast, in methadone- or buprenorphine-treated animals no respiratory depression was observed when ethanol was co-administered along with the morphine challenge. As heroin is converted to morphine in man, selective reversal of morphine tolerance by ethanol may be a contributory factor in heroin overdose deaths