1,375 research outputs found
Stayaverage inc.
Imagine a place where people only perceive you as the best version of you: “perfect” appearance and “perfect” life. On social media it’s easy to create that perfect digital mask. Change your looks by editing or filtering photos to make your life appear faultless. But, it’s also easy to forget that other users can do the exact same thing and even easier to compare ourselves to these seemingly ideal faces and lives. My project is a commentary on the authenticity of people on social media by using a collection of illustrations, fake advertisements, and edited photos posted on Instagram. I created a devilish character to “run an instagram account/fake company” called “Stay Average Inc.” to persuade people to fall into the trap of changing their appearance with the goal of looking “better” or “more attractive” on apps like facebook and instagram. I wanted to personify the devil in your head that tells you every post and every selfie on social media is real, and convince you to stay like the average social media user: posting edited selfies and hiding every part of you that you don’t like
ACCESSORY MENTAL FORAMEN (AMF) IN THE BYZANTINE POPULATION OF GREAT GĂ–ZTEPE TUMULUS/SAFRANBOLU
Variations are one of the most important criteria to present the similarities and differences among populations and individuals. There are different variations that can also be observed on the mandible. One of these variations is the accessory mental foramen (AMF), which is rarely seen on jaws. The paleodemographic analyses conducted on the Byzantine skeletons found in Göztepe Tumulus showed that the population consisted of 24 individuals. Of those 24 individuals, the mandibles of 14 adults were examined macroscopically, and an AMF was found on 3 of them. The examination of the mental foramens (MFs) in terms of their shape showed that 9 oval and 5 circular MFs were found on the left sides of 14 mandibles, and 7 oval and 6 circular MFs were found on the right sides. The present study is important because it is the first study conducted on the AMFs belonging to the Byzantine population in Anatolia
Isogeometric FEM-BEM coupled structural-acoustic analysis of shells using subdivision surfaces
We introduce a coupled finite and boundary element formulation for acoustic
scattering analysis over thin shell structures. A triangular Loop subdivision
surface discretisation is used for both geometry and analysis fields. The
Kirchhoff-Love shell equation is discretised with the finite element method and
the Helmholtz equation for the acoustic field with the boundary element method.
The use of the boundary element formulation allows the elegant handling of
infinite domains and precludes the need for volumetric meshing. In the present
work the subdivision control meshes for the shell displacements and the
acoustic pressures have the same resolution. The corresponding smooth
subdivision basis functions have the continuity property required for the
Kirchhoff-Love formulation and are highly efficient for the acoustic field
computations. We validate the proposed isogeometric formulation through a
closed-form solution of acoustic scattering over a thin shell sphere.
Furthermore, we demonstrate the ability of the proposed approach to handle
complex geometries with arbitrary topology that provides an integrated
isogeometric design and analysis workflow for coupled structural-acoustic
analysis of shells
Premarital and marital problems and problem-solving styles in married and divorced Turkish professional women and men
Close relationships play an integral role in our lives. Problems associated with close relationships
could have social and psychological effects on individuals. Research has documented that
disruption of a relationship is considered as one of the major life stressors.
In this context, the present research aims to identify differences between the intact marriages and
those which ended in divorce, in Turkey, in relation to problems experienced during premarital level and marital level. Furthermore, this research has examined the perceived problem solving
behaviour of the currently married and divorced individuals with respect to premarital and
marital problems experienced. Retrospective survey interviewing was adopted as a data
collection strategy in order to study self-reported problems and problem-solving behaviour by
respondents. It has been hoped that the findings from the present study would be beneficial for
relationship enhancement programs to be developed in Turkey. [Continues.
Parallel iterative solution of the incompressible Navier-Stokes equations with application to rotating wings
We discuss aspects of implementation and performance of parallel iterative solution techniques applied to low Reynolds number flows around fixed and moving rigid bodies. The incompressible Navier-Stokes equations are discretised with Taylor-Hood finite elements in combination with a semi-implicit pressure-correction method. The resulting sequence of convection-diffusion and Poisson equations are solved with preconditioned Krylov subspace methods. To achieve overall scalability we consider new auxiliary algorithms for mesh handling and assembly of the system matrices. We compute the flow around a translating plate and a rotating insect wing to establish the scaling properties of the developed solver. The largest meshes have up to 132 Ă— 10^6 hexahedral finite elements leading to around 3.3 Ă— 10^9 unknowns. For the scalability runs the maximum core count is around 65.5 Ă— 10^3. We find that almost perfect scaling can be achieved with a suitable Krylov subspace iterative method, like conjugate gradients or GMRES, and a block Jacobi preconditioner with incomplete LU factorisation as a subdomain solver. In addition to parallel performance data, we provide new highly-resolved computations of flow around a rotating insect wing and examine its vortex structure and aerodynamic loading.This research was supported by the Engineering and Physical Sciences Research Council (EPSRC) through grant # EP/G008531/1. Additional support was provided by the Czech Science Foundation through grant 14-02067S, and by the Czech Academy of Sciences through RVO:67985840. The presented computations were performed on HECToR at the Edinburgh Parallel Computing Centre through PRACE-2IP (FP7 RI-283493).This is the final version of the article. It first appeared from Elsevier via http://dx.doi.org/10.1016/j.compfluid.2015.08.02
Infill topology and shape optimisation of lattice-skin structures
Lattice-skin structures composed of a thin-shell skin and a lattice infill
are widespread in nature and large-scale engineering due to their efficiency
and exceptional mechanical properties. Recent advances in additive
manufacturing, or 3D printing, make it possible to create lattice-skin
structures of almost any size with arbitrary shape and geometric complexity. We
propose a novel gradient-based approach to optimising both the shape and infill
of lattice-skin structures to improve their efficiency further. The respective
gradients are computed by fully considering the lattice-skin coupling while the
lattice topology and shape optimisation problems are solved in a sequential
manner. The shell is modelled as a Kirchhoff-Love shell and analysed using
isogeometric subdivision surfaces, whereas the lattice is modelled as a
pin-jointed truss. The lattice consists of many cells, possibly of different
sizes, with each containing a small number of struts. We propose a penalisation
approach akin to the SIMP (solid isotropic material with penalisation) method
for topology optimisation of the lattice. Furthermore, a corresponding
sensitivity filter and a lattice extraction technique are introduced to ensure
the stability of the optimisation process and to eliminate scattered struts of
small cross-sectional areas. The developed topology optimisation technique is
suitable for non-periodic, non-uniform lattices. For shape optimisation of both
the shell and the lattice, the geometry of the lattice-skin structure is
parameterised using the free-form deformation technique. The topology and shape
optimisation problems are solved in an iterative, sequential manner. The
effectiveness of the proposed approach and the influence of different
algorithmic parameters are demonstrated with several numerical examples.Comment: 20 pages, 17 figure
Manifold-based isogeometric analysis basis functions with prescribed sharp features
We introduce manifold-based basis functions for isogeometric analysis of
surfaces with arbitrary smoothness, prescribed continuous creases and
boundaries. The utility of the manifold-based surface construction techniques
in isogeometric analysis was demonstrated in Majeed and Cirak (CMAME, 2017).
The respective basis functions are derived by combining differential-geometric
manifold techniques with conformal parametrisations and the partition of unity
method. The connectivity of a given unstructured quadrilateral control mesh in
is used to define a set of overlapping charts. Each vertex with
its attached elements is assigned a corresponding conformally parametrised
planar chart domain in , so that a quadrilateral element is
present on four different charts. On the collection of unconnected chart
domains, the partition of unity method is used for approximation. The
transition functions required for navigating between the chart domains are
composed out of conformal maps. The necessary smooth partition of unity, or
blending, functions for the charts are assembled from tensor-product B-spline
pieces and require in contrast to earlier constructions no normalisation.
Creases are introduced across user tagged edges of the control mesh. Planar
chart domains that include creased edges or are adjacent to the domain boundary
require special local polynomial approximants. Three different types of chart
domain geometries are necessary to consider boundaries and arbitrary number and
arrangement of creases. The new chart domain geometries are chosen so that it
becomes trivial to establish local polynomial approximants that are always
continuous across tagged edges. The derived non-rational manifold-based
basis functions are particularly well suited for isogeometric analysis of
Kirchhoff-Love thin shells with kinks
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