Stiffness topology optimization is usually based on a state problem of linear elasticity, and there seems to be little discussion on what is the limit for such a small rotation-displacement assumption. We show that even for gross rotations that are in all practical aspects small (< 3 deg), topology optimization based on a large deformation theory might generate different design concepts compare...

INTRODUCTION From the point of dental practice, the restoration of endodontically treated teeth has become an important aspect as it involves a range of treatment options of variable complexity. Restoring teeth with insufficient coronal tooth structure, it is always indicated to use the post to retain a core for definitive restoration. Fiber post has a modulus of elasticity in analogs to dentin...

A stochastic response of an elastic 3D half-space to random displacement excitations on the boundary plane is studied. We derive exact results for the case of white noise excitations which are then used to give convolution representations for the case of general finite correlation length fluctuations of displacements prescribed on the boundary. Solutions to this elasticity problem are random fi...

Linear response theory of thermal fluctuations or driven motion of tracers provides a basis for exploring viscous, elastic and compressible properties of condensed matter. Applications range from atomic physics [1, 24] where the methods were first developed, to recent applications in microrheology [13, 18, 7, 5, 11, 12, 2]. The emphasis here is on hydrodynamics and deformations of incompressibl...

Nucleic acids have been used to create diverse synthetic structural and dynamic systems. Toehold-mediated strand displacement has enabled the construction of sophisticated circuits, motors, and molecular computers. Yet it remains challenging to demonstrate complex structural reconfiguration in which a structure changes from a starting shape to another arbitrarily prescribed shape. To address th...

where f(x) represents the distributed transverse load applied to it, and φ represents the prescribed transverse displacement at the boundary. In this note we wish to investigate the inverse problem of determining the plane traction state tensor σ from boundary measurements on displacements and on the corresponding forces. As an initial attempt, since the external load f has no influence on the ...

The bacteriophage P1 recombination enhancement function (Ref) protein is a RecA-dependent programmable endonuclease. Ref targets displacement loops formed when an oligonucleotide is bound by a RecA filament and invades homologous double-stranded DNA sequences. Mechanistic details of this reaction have been explored, revealing that (i) Ref is nickase, cleaving the two target strands of a displac...

A simple model for a swimmer consisting of three colinearly linked spheres attached by rods and oscillating out of phase to break reciprocal motion is analyzed. With a prescribed forcing of the rods acting on the three spheres, the swimming dynamics are determined analytically in both a Newtonian Stokes fluid and a zero Reynolds number, nonlinear, Oldroyd-B viscoelastic fluid with Deborah numbe...

The article addresses the role of tourist movement in defining Salta (Argentina) as a place. In order to do that, specific practices displacement (guided tours hired by tourists) were observed. As preliminary study, paper discusses traditional approaches guided highly standardized and prescribed experiences. And it also exposes active participation different actors that take part tours. additio...

• New formulation of topology optimization with uncertain boundary displacement. Existence solutions to continuum formulation. Numerical comparison standard NLP-solver, SDP-solver and non-smooth solver. We present a worst-case approach (TO) for maximum stiffness under displacement parametrized by matrix-valued scaling function times an vector giving its direction. The objective in the TO proble...