Results 71 to 80 of about 201,464 (300)

Casimir Forces between Spherical Particles in a Critical Fluid and Conformal Invariance

open access: yes, 1995
Mesoscopic particles immersed in a critical fluid experience long-range Casimir forces due to critical fluctuations. Using field theoretical methods, we investigate the Casimir interaction between two spherical particles and between a single particle and
A. A. Belavin   +56 more
core   +2 more sources

Is it possible to establish reference values for ankle muscle isokinetic strength? A meta-analytical study [PDF]

open access: yes, 2014
BACKGROUND: The importance of measuring ankle muscle strength (AMS) has been demonstrated in a variety of clinical areas. Much data has been accumulated using the Cybex Norm isokinetic dynamometer but a uniform framework does not exist.
Fish, M, Killey, J, Milligan, J
core   +1 more source

Solar Power Concentrators for Space Applications

open access: yesPAM Review Energy Science & Technology, 2016
Space based solar power is an attractive solution to growing energy needs, overcoming the operational downtime and atmospheric losses inherent to terrestrial solar technologies. Ideal solar satellites include concentrator systems in order to produce a high specific power output, keeping mass low for economic launch.
Joshua Pritchard   +3 more
openaire   +2 more sources

Electroactive Liquid Crystal Elastomers as Soft Actuators

open access: yesAdvanced Functional Materials, EarlyView.
Electroactive liquid crystal elastomers (eLCEs) can be actuated via electromechanical, electrochemical, or electrothermal effects. a) Electromechanical effects include Maxwell stress, electrostriction, and the electroclinic effect. b) Electrochemical effects arise from electrode redox reactions.
Yakui Deng, Min‐Hui Li
wiley   +1 more source

Distribution Characteristics and Influence Analysis of Rail Transit Station Area Public Spaces in Shanghai Core Urban Districts

open access: yesChengshi guidao jiaotong yanjiu
[Objective] Public spaces serve as a vital carrier for user activities within rail transit station areas. To enhance spatial performance and quality vitality of these areas, it is necessary to analyze the distribution characteristics of public spaces and
YUAN Ming
doaj   +1 more source

Synthesis of Thinned Concentric Circular Antenna Arrays Using Modified TLBO Algorithm

open access: yesInternational Journal of Antennas and Propagation, 2015
Teaching-learning-based optimization (TLBO) algorithm is a new kind of stochastic metaheuristic algorithm which has been proven effective and powerful in many engineering optimization problems.
Zailei Luo   +4 more
doaj   +1 more source

Modeling the boundaries of the working space of a planar three-link manipulator [PDF]

open access: yesОмский научный вестник
A study of the boundaries of the working space of a three-link planar manipulator, specified by analytical equations, is carried out. A new geometric interpretation of these samples is proposed. On its basis, it is established that outer space consists
T. A. Sheveleva, A. A. Lyashkov
doaj   +1 more source

Green wedges:origins and development in Britain [PDF]

open access: yes, 2014
The paper analyzes the history of green wedges in Britain from their origins in the first decade of the twentieth century up until the outbreak of the Second World War. Often neglected by the literature in favour of the 'greenbelt', the 'green wedge' was
Lemes De Oliveira, Fabiano
core   +1 more source

SPACE STATION SOLAR CONCENTRATOR MATERIALS RESEARCH [PDF]

open access: yesAdvanced Materials and Manufacturing Processes, 1988
The Space Station will represent the first time that a solar dynamic power system will be used to generate electrical power in space. In a system such as this, sunlight is collected and focused by a solar concentrator onto the receiver of a heat engine which converts the energy into electricity.
openaire   +1 more source

Three‐dimensional Antimony Sulfide Based Flat Optics

open access: yesAdvanced Functional Materials, EarlyView.
This work presents the development of a grayscale electron beam lithography (g‐EBL) method for fabricating antimony trisulfide (Sb2S3) nanostructures with customizable 3D profiles. The refractive index of g‐EBL patterned Sb2S3 is determined based on the synergy of genetic algorithm and transfer matrix method.
Wei Wang   +18 more
wiley   +1 more source

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