Results 11 to 20 of about 1,003,276 (281)

Total Facelift: Forehead Lift, Midface Lift, and Neck Lift [PDF]

open access: yesArchives of Plastic Surgery, 2015
Patients with thick skin mainly exhibit the aging processes of sagging, whereas patients with thin skin develop wrinkles or volume loss. Asian skin is usually thicker than that of Westerners; and thus, the sagging of skin due to aging, rather than wrinkling, is the chief problem to be addressed in Asians. Asian skin is also relatively large in area and
openaire   +3 more sources

Effect of lift force on the aerodynamics of dust grains in the protoplanetary disk [PDF]

open access: yes, 2014
We newly introduce lift force into the aerodynamics of dust grains in the protoplanetary disk. Although many authors have so far investigated the effects of the drag force, gravitational force and electric force on the dust grains, the lift force has ...
Kimura, Shigeo S., Yamaguchi, Masaki S.
core   +2 more sources

Removal of conical singularities from rotating C-metrics and dual CFT entropy

open access: yesJournal of High Energy Physics, 2022
We show how to remove from the rotating C-metric spacetime, which describes accelerating Kerr black holes, both conical singularities. This can be done by embedding the metric into a swirling gravitational universe, through a proper Ehlers transformation.
Marco Astorino
doaj   +1 more source

Equivariant semidefinite lifts of regular polygons [PDF]

open access: yes, 2014
Given a polytope P in $\mathbb{R}^n$, we say that P has a positive semidefinite lift (psd lift) of size d if one can express P as the linear projection of an affine slice of the positive semidefinite cone $\mathbf{S}^d_+$.
Fawzi, Hamza   +2 more
core   +1 more source

Lifting Projectives [PDF]

open access: yesNagoya Mathematical Journal, 1966
Let R be a ring with radical (all rings have a unit element, all modules are unital). Often, one wishes to lift modules modulo , that is, to a given, say, left R/-module U find a left R-module E with the property that E/E ≃ U. This is of course not always possible.
openaire   +2 more sources

Effects of Different Shaped Cavities and Bumps on Flow Structure and Wing Performance [PDF]

open access: yesJournal of Applied Fluid Mechanics, 2022
The stall of an aircraft is one of the most dangerous phenomena in the aviation world, resulting in a sudden loss of lift because of boundary layer separation. This work aims to delay separation and to improve wing aerodynamic performances by introducing
A. Mahboub, M. Bouzit, A. Ghenaim
doaj   +1 more source

Source to Accretion Disk Tilt [PDF]

open access: yes, 2010
Many different system types retrogradely precess, and retrograde precession could be from a tidal torque by the secondary on a misaligned accretion disk. However, a source to cause and maintain disk tilt is unknown.
Aly   +38 more
core   +3 more sources

A Procedure for Taking a Remotely Controlled Elevator with an Autonomous Mobile Robot Based on 2D LIDAR

open access: yesSensors, 2023
Navigating between the different floors of a multistory building is a task that requires walking up or down stairs or taking an elevator or lift. This work proposes a procedure to take a remotely controlled elevator with an autonomous mobile robot based ...
Jordi Palacín   +3 more
doaj   +1 more source

Supersonic Flow over Elliptic Cone with Different Ellipticity Ratio [PDF]

open access: yesJournal of Applied Fluid Mechanics, 2023
This study investigates supersonic flow characteristics over circular and elliptic cones at various angles of attack. Simulations were conducted on the cones with the same base area and length-to-diameter ratio.
V. Kotebavi, S. G. Rakesh
doaj   +1 more source

Comparative analysis and manufacturing of airfoil structures suitable for use at low speeds

open access: yesJournal of Advanced Research in Natural and Applied Sciences, 2022
An aerodynamic technique to calculating lift and drag coefficients is one of the required instruments in the wing design process. During the last decades, several tools and software have been developed according to aero-dynamics and numerical methods ...
Sinan Fidan   +2 more
doaj   +1 more source

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