28,858 research outputs found
Optimal shock isolation with minimum settling time
It is shown how unique isolator forces and corresponding forces can be chosen by superimposing a minimum settling time onto the limiting performance of the shock isolation system. Basically, this means that the system which has reached the peak value of the performance index is settled to rest in minimum time
Editorial and Critical Reflections on the future of identity moments and social media in China and beyond
This Special Issue of Global Media and China responds in part to Stuart Hall’s famous 1996 invocation, ‘Who needs identity?’ – to study ‘specific enunciative strategies’ utilized within ‘specific modalities of power’ so as to consider identity discourses of the present and of the future. This issue draws upon empirical observations presented and debated at the 2019 Chinese Internet Research Conference held in Singapore in May 2019, as well as theoretical contributions in identity politics and social media, the chosen site or ‘modality of power’. This editorial and critical essay reflects upon, complemented and supported by the papers in this issue, the critical and conceptual frameworks that are emerging to critique the global and local complexities, diversity and dynamics resulting from the deeper integration of social media into the everyday lives of Chinese Internet users. It presents an overview of the 2019 Chinese Internet Research Conference proceedings in terms of how social media is used to wrap personal politics into a widening range of identity groupings around gender, class, citizens, pop culture and religion in ways that signal the future of newer forms of identity politics among Internet users in China. Since social media posts and exchanges, while geographically sourced and situated, often transcend their boundaries, the arguments presented here goes beyond China and are global. The shareability of identity mediated by individual, state and public discourses on social and ‘anti-social’ media during the COVID-19 pandemic within China, Singapore and Australia leads to novel ways of understanding identity politics in globalizing China and strategic uses of Chinese identity
In Search of the Right Trousers Pattern - Comparison of Four Different Pattern Making Methods in Affordance with Different Body Shapes
Clothing comfort is one of the major concerns in the clothing industry. Various pattern making methods have been introduced to the industry with consideration to clothing comfort. This study evaluates four pattern making methods known as the ESMOD, Bunka, Aldrich, and Armstrong methods. The work focuses on trouser patterns and uses two subjects who have similar height, weight and BMI but have different body shapes and body sizes. The body measurement data of the two subjects were collected using a three-dimensional body scanner and patterns of the four different methods were developed accordingly. The fit of experimental garments were examined by two subjects and experts using questionnaires and were analysed
Image interpolation using Shearlet based iterative refinement
This paper proposes an image interpolation algorithm exploiting sparse
representation for natural images. It involves three main steps: (a) obtaining
an initial estimate of the high resolution image using linear methods like FIR
filtering, (b) promoting sparsity in a selected dictionary through iterative
thresholding, and (c) extracting high frequency information from the
approximation to refine the initial estimate. For the sparse modeling, a
shearlet dictionary is chosen to yield a multiscale directional representation.
The proposed algorithm is compared to several state-of-the-art methods to
assess its objective as well as subjective performance. Compared to the cubic
spline interpolation method, an average PSNR gain of around 0.8 dB is observed
over a dataset of 200 images
Neutron elastic scattering on calcium isotopes from chiral nuclear optical potentials
We formulate microscopic neutron-nucleus optical potentials from many-body
perturbation theory based on chiral two- and three-body forces. The neutron
self energy is first calculated in homogeneous matter to second order in
perturbation theory, which gives the central real and imaginary terms of the
optical potential. The real spin-orbit term is calculated separately from the
density matrix expansion using the same chiral interaction as in the self
energy. Finally, the full neutron-nucleus optical potential is derived within
the improved local density approximation utilizing mean field models consistent
with the chiral nuclear force employed. We compare the results of the
microscopic calculations to phenomenological models and experimental data up to
projectile energies of MeV. Experimental elastic differential
scattering cross sections and vector analyzing powers are generally well
reproduced by the chiral optical potential, but we find that total cross
sections are overestimated at high energies
Measurement of Spin Polarization by Andreev Reflection in Ferromagnetic In1-xMnxSb Epilayers
We carried out Point Contact Andreev Reflection (PCAR) spin spectroscopy
measurements on epitaxially-grown ferromagnetic In1-xMnxSb epilayers with a
Curie temperature of ~9K. The spin sensitivity of PCAR in this material was
demonstrated by parallel control studies on its non-magnetic analog,
In1-yBeySb. We found the conductance curves of the Sn point contacts with
In1-yBeySb to be fairly conventional, with the possible presence of
proximity-induced superconductivity effects at the lowest temperatures. The
experimental Z-values of interfacial scattering agreed well with the estimates
based on the Fermi velocity mismatch between the semiconductor and the
superconductor. These measurements provided control data for subsequent PCAR
measurements on ferromagnetic In1-xMnxSb, which indicated spin polarization in
In1-xMnxSb to be 52 +- 3%
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