نتایج جستجو برای: wrinkling

تعداد نتایج: 1257  

Journal: :Journal of drugs in dermatology : JDD 2010
James J Leyden Lisa Parr

There has been a proliferation of treatments for facial rejuvenation but, curiously, the use of such treatments on other areas of the body has not been widely investigated. The clinical effects of treating photodamaged skin of the neck and anterior chest area (décolletage) with a proprietary copper zinc malonate lotion and a proprietary 4% hydroquinone cream (twice daily), plus tretinoin cream ...

2003
L. J. Dursi J. W. Truran

Critically understanding the ‘standard candle’-like behavior of Type Ia supernovae requires understanding their explosion mechanism. One family of models for Type Ia Supernovae begins with a deflagration in a Carbon-Oxygen white dwarf which greatly accelerates through wrinkling and flame instabilities. While the planar speed and behavior of astrophysically-relevant flames is increasingly well u...

Journal: :Pediatric neurology 2015
Pin Fee Chong Masaru Matsukura Ryutaro Kira

An 11-year-old boy was referred for right leg pain that had lasted for 3 months. No history of trauma was documented, and infectious, vascular, and neoplastic evaluation was unremarkable. Physical examination revealed atrophy of the right lower limb, and the right foot was cold and pale. He demonstrated allodynia with light tactile stimulation. He also complained of decreased heat and cold sens...

Journal: :Nanoscale 2015
Feng Wang Juewen Liu

With the thickness of only a single atomic layer, graphene displays many interesting surface properties. A general observation is that wrinkles are formed on graphene oxide (GO) when it is dried in the presence of adsorbed inorganic nanoparticles. In this case, evaporation induced wrinkling is not an elastic deformation but is permanent. Understanding the nanoscale force of wrinkle formation is...

Journal: :Finite Elements in Analysis and Design 2006

Journal: :International Journal of Solids and Structures 2014

2008
D. Veynante V. Moureau L. Vervisch

A new modeling strategy is developed to introduce tabulated chemistry methods in LES of turbulent premixed combustion. The objective is to recover the correct laminar flame propagation speed of the filtered flame front when subgrid scale turbulence vanishes. The filtered flame structure is mapped by 1-D filtered laminar premixed flames. Closure of the filtered progress variable and the energy b...

Journal: :Soft matter 2015
Senjiang Yu Xiaofei Zhang Xiaofei Xiao Hong Zhou Miaogen Chen

Homogeneous global wrinkling patterns such as labyrinths, herringbones, ripples and straight stripes can be widely observed in natural and artificial systems, but localized wrinkling patterns (not including buckle-driven delaminations, folds, ridges and creases) are seldom observed in experiments. Here we report on the spontaneous formation of highly ordered wrinkled stripes localized by cracks...

Journal: :Journal of the mechanics and physics of solids 2008
Donghee Lee N Triantafyllidis J R Barber M D Thouless

If a body with a stiffer surface layer is loaded in compression, a surface wrinkling instability may be developed. A bifurcation analysis is presented for determining the critical load for the onset of wrinkling and the associated wavelength for materials in which the elastic modulus is an arbitrary function of depth. The analysis leads to an eigenvalue problem involving a pair of linear ordina...

2007
T. Gerngross S. Pellegrino

The thin film used for the NASA Ultra Long Duration Balloons (ULDB) shows considerable time-dependent behaviour. Furthermore, experiments on scaled ULDB balloons have revealed that wrinkles are present over a wide range of pressures. A numerical model has been developed describing the nonlinear anisotropic viscoelastic material behaviour by means of a Schapery-type model and this model has been...

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