Results 51 to 60 of about 71,329 (324)

A 3D Biofabricated Disease Model Mimicking the Brain Extracellular Matrix Suitable to Characterize Intrinsic Neuronal Network Alterations in the Presence of a Breast Tumor Disseminated to the Brain

open access: yesAdvanced Functional Materials, EarlyView.
A 3D disease model is developed using customized hyaluronic‐acid‐based hydrogels supplemented with extracellular matrix (ECM) proteins resembling brain ECM properties. Neurons, astrocytes, and tumor cells are used to mimic the native brain surrounding.
Esra Türker   +16 more
wiley   +1 more source

Buckling loads of columns of regular polygon cross-section with constant volume and clamped ends

open access: yesElectronic Journal of Structural Engineering, 2002
A numerical method is developed for calculating the buckling loads of tapered columns of regular polygon cross-section with constant volume and both clamped ends. The linear, parabolic and sinusoidal tapers are considered in numerical examples. From the
Byoung Koo Lee, Sang Jin Oh, Guangfan Li
doaj  

Cutting sequences on translation surfaces [PDF]

open access: yes, 2013
We analyze the cutting sequences associated to geodesic flow on a large class of translation surfaces, including Bouw-Moller surfaces. We give a combinatorial rule that relates a cutting sequence corresponding to a given trajectory, to the cutting ...
Davis, Diana
core   +1 more source

Attaching handles to Delaunay nodo\"{\i}ds

open access: yes, 2010
For all $m \in \mathbb N - \{0\}$, we prove the existence of a one dimensional family of genus $m$, constant mean curvature (equal to 1) surfaces which are complete, immersed in $\mathbb R^3$ and have two Delaunay ends asymptotic to nodo\"{\i}dal ends ...
Pacard, Frank, Rosenberg, Harold
core   +2 more sources

Precursor Mineral Phases of Forming Mollusk Shell Nacre: A Study of Hydrated Samples

open access: yesAdvanced Functional Materials, EarlyView.
Mineral, organic phase, and water are the essential components in mollusk shell nacre formation. Their interplay is not well understood, because the hydrated material is difficult to observe at high resolution, under close to native conditions. Forming nacre is studied using environmental and cryo‐electron microscopy and hydrated ACC phases, together ...
Anna Kozell   +4 more
wiley   +1 more source

Examples, Counterexamples, and Enumeration Results for Foldings and Unfoldings between Polygons and Polytopes [PDF]

open access: yes, 2000
We investigate how to make the surface of a convex polyhedron (a polytope) by folding up a polygon and gluing its perimeter shut, and the reverse process of cutting open a polytope and unfolding it to a polygon.
Demaine, Erik D.   +3 more
core   +3 more sources

Scalable Thermal Engineering via Femtosecond Laser‐Direct‐Written Phononic Nanostructures

open access: yesAdvanced Functional Materials, EarlyView.
This study demonstrates that femtosecond laser‐induced periodic surface structures (fs‐LIPSS) can function as phononic metasurfaces, reducing thermal conductivity below the plain thin‐film limit. Phonon Monte Carlo analysis reveals that the periodic structures restrict phonon mean free paths.
Hiroki Hamma   +4 more
wiley   +1 more source

On nonexistence of an integer regular polygon [PDF]

open access: yes, 1998
In this paper we consider the question whether there is a regular polygon in the Cartesian coordinate system such that all of its coordinates are integers. We are not interested in the case of square since it is trivial.
D. Klobučar
core   +1 more source

Some contributions to Regular Polygons

open access: yes, 2016
9 pages, 4 ...
ÖNCEL, Deniz, KİRİŞÇİ, Murat
openaire   +3 more sources

Multiscale Hybrid Surface Topographies Orchestrate Immune Regulation, Antibacterial Defense, and Tissue Regeneration

open access: yesAdvanced Healthcare Materials, EarlyView.
Hybrid wrinkled topographies coordinate immune, tissue, and bacterial interactions. The surfaces promote osteointegration, tune macrophage polarization, and inhibit biofilm formation, highlighting a multifunctional strategy for next‐generation implant design.
Mohammad Asadi Tokmedash   +4 more
wiley   +1 more source

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