29,425 research outputs found

    Influence of store attributes on shopping intentions in factory outlet malls

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    This paper examines the effect of eight types of consumer decision-making styles and shopping behaviour on future shopping intentions at factory outlet malls. Results indicate that six out of eight decision-making styles are positively related of future shopping intentions. Conclusions drawn from the current study's findings and their implications for consumer decision-making and shopping behaviour are discussed

    Nonlinear ER effects in an ac applied field

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    The electric field used in most electrorheological (ER) experiments is usually quite high, and nonlinear ER effects have been theoretically predicted and experimentally measured recently. A direct method of measuring the nonlinear ER effects is to examine the frequency dependence of the same effects. For a sinusoidal applied field, we calculate the ac response which generally includes higher harmonics. In is work, we develop a multiple image formula, and calculate the total dipole moments of a pair of dielectric spheres, embedded in a nonlinear host. The higher harmonics due to the nonlinearity are calculated systematically.Comment: Presented at Conference on Computational Physics (CCP2000), held at Gold Coast, Australia from 3-8, December 200

    On the Quantization of Multilinear Momentum Observables

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    A generally accepted set of axioms of quantization is introduced and applied to the quantization of the multilinear momentum observables so as to delimit the possible forms of the corresponding quantum operators. This analysis leads to a canonical decomposition of the quantum observables into a series of symmetric operators each of which is determined by an unknown auxilliary tensor generated by the multilinear momentum. Methods of removing the residual indeterminates in the differential operators are then critically reviewed, and a particular choice illustrated by means of examples defined on the real line

    Nonlinear ac response of anisotropic composites

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    When a suspension consisting of dielectric particles having nonlinear characteristics is subjected to a sinusoidal (ac) field, the electrical response will in general consist of ac fields at frequencies of the higher-order harmonics. These ac responses will also be anisotropic. In this work, a self-consistent formalism has been employed to compute the induced dipole moment for suspensions in which the suspended particles have nonlinear characteristics, in an attempt to investigate the anisotropy in the ac response. The results showed that the harmonics of the induced dipole moment and the local electric field are both increased as the anisotropy increases for the longitudinal field case, while the harmonics are decreased as the anisotropy increases for the transverse field case. These results are qualitatively understood with the spectral representation. Thus, by measuring the ac responses both parallel and perpendicular to the uniaxial anisotropic axis of the field-induced structures, it is possible to perform a real-time monitoring of the field-induced aggregation process.Comment: 14 pages and 4 eps figure

    Integrating Constrained Experiments in Long-term Human-Robot Interaction using Task– and Scenario–based Prototyping

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    © 2015 The Author(s). Published with license by Taylor & Francis© Dag Sverre Syrdal, Kerstin Dautenhahn, Kheng Lee Koay, and Wan Ching Ho. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The moral rights of the named author(s) have been asserted. Permission is granted subject to the terms of the License under which the work was published. Please check the License conditions for the work which you wish to reuse. Full and appropriate attribution must be given. This permission does not cover any third party copyrighted material which may appear in the work requested.In order to investigate how the use of robots may impact everyday tasks, 12 participants interacted with a University of Hertfordshire Sunflower robot over a period of 8 weeks in the university’s Robot House.. Participants performed two constrained tasks, one physical and one cognitive , 4 times over this period. Participant responses were recorded using a variety of measures including the System Usability Scale and the NASA Task Load Index . The use of the robot had an impact on the experienced workload of the participants diïŹ€erently for the two tasks, and this eïŹ€ect changed over time. In the physical task, there was evidence of adaptation to the robot’s behaviour. For the cognitive task, the use of the robot was experienced as more frustrating in the later weeks.Peer reviewedFinal Published versio

    Coulomb interaction effects on nonlinear optical response in C60, C70, and higher fullerenes

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    Nonlinear optical properties in the fullerene C60_{60} and the extracted higher fullerenes -- C70_{70}, C76_{76}, C78_{78}, and C84_{84} -- are theoretically investigated by using the exciton formalism and the sum-over-states method. We find that off-resonant third order susceptibilities of higher fullerenes are a few times larger than those of C60_{60}. The magnitude of nonlinearity increases as the optical gap decreases in higher fullerenes. The nonlinearity is nearly proportional to the fourth power of the carbon number when the onsite Coulomb repulsion is 2t2t or 4t4t, tt being the nearest neighbor hopping integral. This result, indicating important roles of Coulomb interactions, agrees with quantum chemical calculations of higher fullerenes.Comment: 8 pages; 3 figures; Figures should be requested to the author (E-mail: [email protected]
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