Filters








92,953 Hits in 4.1 sec

In Situ Deposition and Patterning of Single-Walled Carbon Nanotubes by Laminar Flow and Controlled Flocculation in Microfluidic Channels

Jang-Ung Park, Matthew. A. Meitl, Seung-Hyun Hur, Monica L. Usrey, Michael S. Strano, Paul J. A. Kenis, John A. Rogers
2006 Angewandte Chemie International Edition  
This method generates welldefined patterns of aligned SWNT films with controlled density and alignment on a variety of flat and curved surfaces.  ...  ., curved surfaces). Herein we introduce a technique for patterning and depositing SWNTs through the use of controlled flocculation in laminar microfluidic networks.  ... 
doi:10.1002/anie.200501799 pmid:16342126 fatcat:5w42tdz7qfegxnzzculu4ezh5y

In Situ Deposition and Patterning of Single-Walled Carbon Nanotubes by Laminar Flow and Controlled Flocculation in Microfluidic Channels

Jang-Ung Park, Matthew. A. Meitl, Seung-Hyun Hur, Monica L. Usrey, Michael S. Strano, Paul J. A. Kenis, John A. Rogers
2006 Angewandte Chemie  
This method generates welldefined patterns of aligned SWNT films with controlled density and alignment on a variety of flat and curved surfaces.  ...  ., curved surfaces). Herein we introduce a technique for patterning and depositing SWNTs through the use of controlled flocculation in laminar microfluidic networks.  ... 
doi:10.1002/ange.200501799 fatcat:vh75jl4nrvej5omgtiajscs7uy

Effect of Electro-Optical Memory in Liquid Crystals Doped with Carbon Nanotubes

L. Dolgov, O. Yaroshchuk, M. Lebovka
2008 Molecular Crystals and Liquid Crystals  
It is revealed that the efficiency of electro-optical memory depends on the network morphology and the efficiency of electrohydrodynamic flows in a liquid crystal.  ...  It is pointed out that the stabilization of the planar state is due to the network of small nanotube aggregates formed in the liquid crystal disturbed by electro-hydrodynamic flows.  ...  Planar alignment state can be stabilized by a network of nanotubes which can be considered as a spatially distributed aligning surface.  ... 
doi:10.1080/15421400802451816 fatcat:pjw7j7ihmrfvjl2kkaegawvvna

Flow-assisted assembly of nanostructured protein microfibers

Ayaka Kamada, Nitesh Mittal, L. Daniel Söderberg, Tobias Ingverud, Wiebke Ohm, Stephan V. Roth, Fredrik Lundell, Christofer Lendel
2017 Proceedings of the National Academy of Sciences of the United States of America  
However, forced extension toward alignment of fibrils is a common component of wet spinning techniques, which have emerged as promising procedures for controlled fiber formation (12-18).  ...  (13, 17, 19) to carry out in situ investigations of the assembly of PNFs during the flow orientation.  ...  When the straight fibrils are aligned in the flow, the possibilities of further optimizing the interaction network decrease, resulting in suboptimal cross-linking of PNFs.  ... 
doi:10.1073/pnas.1617260114 pmid:28123065 pmcid:PMC5307460 fatcat:ja52vpox3fgnpbylde5wv4xpte

Sketch-based generation and editing of quad meshes

Kenshi Takayama, Daniele Panozzo, Alexander Sorkine-Hornung, Olga Sorkine-Hornung
2013 ACM Transactions on Graphics  
We developed a set of novel user interfaces that assist the user in constructing a curve network representing such patch boundaries.  ...  The smooth subdivision surfaces defined by the coarse quad meshes demonstrate the suitability of our approach for practical production pipelines.  ...  The Bunny and Armadillo models are courtesy of the Stanford 3D Scanning Repository. The Horse and Bimba models are courtesy of the AIM@SHAPE Shape Repository.  ... 
doi:10.1145/2461912.2461955 fatcat:tstowaduuvholmau3m3dbcy4i4

Actomyosin Contractility and Actin Polymerization Explain Dynamic Behavior of Dendritic Filopodia

Olena Marchenko, Charles Wolgemuth, Leslie Loew
2013 Biophysical Journal  
In this study, we first proposed a model for the estimation of apical cell membrane fluctuations from the ion current curves, i.e., the ion current vs. the tip-surface distance.  ...  B511 Adhesive Interactions between the Load Surface and the Actin Filament Tips Control the Mechanical Response of Branched Actin Networks Alex C.  ...  In this study, we first proposed a model for the estimation of apical cell membrane fluctuations from the ion current curves, i.e., the ion current vs. the tip-surface distance.  ... 
doi:10.1016/j.bpj.2012.11.1756 fatcat:cmyiimpmzvgobpkaoor23ex6aa

Network Alignment by Discrete Ollivier-Ricci Flow [article]

Chien-Chun Ni and Yu-Yao Lin and Jie Gao and Xianfeng David Gu
2018 arXiv   pre-print
This is then used to define similarity of a pair of nodes in two networks respectively, which is the crucial step of network alignment. curvatures and graph Ricci flows.  ...  In this paper, we consider the problem of approximately aligning/matching two graphs.  ...  We then present graph curvature and curvature flow, how they are used in network alignment, and empirical evaluations. Background Curvature and Ricci Flow on Surfaces.  ... 
arXiv:1809.00320v2 fatcat:5orcox63mbc6bfgtnku3tvgyle

Deep Energies for Estimating Three-Dimensional Facial Pose and Expression [article]

Michael Bao, Jane Wu, Xinwei Yao, Ronald Fedkiw
2018 arXiv   pre-print
We propose an alternative approach whereby these curves and other keypoints are detected automatically on both the image and the synthetic renders using trained neural networks, eliminating artist subjectivity  ...  These curves are subjective and difficult to draw consistently; moreover, ad-hoc procedural methods are required for generating matching rotoscope curves on synthetic renders embedded in the optimization  ...  While we have only explored using pre-trained facial alignment and optical flow networks, using other types of networks (e.g. face segmentation, face recognition, etc.) and using networks trained specifically  ... 
arXiv:1812.02899v1 fatcat:4zleluv5yjbnlicjt5iswrambq

Marangoni flows drive the alignment of fibrillar cell-laden hydrogels

Bryan A. Nerger, P.-T. Brun, Celeste M. Nelson
2020 Science Advances  
Here, we demonstrate that flow in evaporating aqueous sessile droplets containing type I collagen—a self-assembling polymer—can be harnessed to engineer hydrated networks of aligned collagen fibers.  ...  Skeletal muscle cells that are incorporated into and cultured within these evaporating droplets collectively orient and subsequently differentiate into myotubes in response to aligned networks of collagen  ...  Pethica, and members of the Tissue Morphodynamics Group for helpful discussions. We also thank G. Laevsky, L.  ... 
doi:10.1126/sciadv.aaz7748 pmid:32582851 pmcid:PMC7292634 fatcat:gzhozyfhi5epbdo527bnpm4xlu

Mesoscale substrate curvature overrules nanoscale contact guidance to direct bone marrow stromal cell migration

Maike Werner, Nicholas A. Kurniawan, Gabriela Korus, Carlijn V. C. Bouten, Ansgar Petersen
2018 Journal of the Royal Society Interface  
We thank Erik Bekkers for providing us with an analysis method to determine the orientation direction of the collagen fibrils orientation on curved surfaces.  ...  Acknowledgements We thank Jaap den Toonder for his advice in microfabrication techniques to produce moulds with curved surfaces.  ...  Representative profilometry surface profile of the smooth curved PDMS surfaces (G).  ... 
doi:10.1098/rsif.2018.0162 pmid:30089684 fatcat:bq6cfckvrrbznfvlnxkxfr7kna

Peak Flows and Stormwater Networks Design—Current and Future Management of Urban Surface Watersheds

António Freire Diogo, José Antunes do Carmo
2019 Water  
Numerical integration of Saint-Venant equations for one-dimensional gradually varied unsteady flow allows the computation of waves' progression along the pipes for given input surface hydrographs.  ...  The need for indispensable requirements for suitable urbanization rules, intelligent management of surface runoff in urban basins, and control measures for the reduction of peak flows entering existing  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/w11040759 fatcat:ihihxjcc55bpnje56lktbhg3vy

Hydrogen bonded ferroelectric liquid crystal gels in freely suspended film geometry

Jianjun Li, Ralf Stannarius, Christian Tolksdorf, Rudolf Zentel
2003 Physical Chemistry, Chemical Physics - PCCP  
We study freely suspended films of smectic C * liquid crystalline gels by means of polarizing microscopy. The gel point of the system is determined from the suppression of flow in the films.  ...  The network of hydrogen bonds is mechanically fragile but stabilizes orientation patterns of the sample, in particular it stores the texture present during gelation.  ...  The electric DC field strengths necessary to align the ferroelectric polarizations in the domains produce convective flow in the films during the gelation, which prevents the formation of an aligned network  ... 
doi:10.1039/b205210e fatcat:svvvyndmlrdofarybg6oe5gyxu

Rheology in Polymer/Clay Nanocomposites: Mesoscale Structure Development and Soft Glassy Dynamics [chapter]

2009 Nano- and Biocomposites  
In contrast, the orientation occurs by the "normal" to the clay surface aligning the flow direction through vorticity during shear.  ...  Alignment of silicate Layers in networks The organo-clay platelets orient in both shear and elongational flow fields. A second question is how the platelets are oriented during the flow direction.  ... 
doi:10.1201/9781420080292-8 fatcat:bfsqmgsb3vba7cgjgiucoeubqi

Directed Assembly of One-Dimensional Nanostructures into Functional Networks

Y. Huang
2001 Science  
Specifically, the channel flow near the substrate surface resembles a shear flow and aligns the NWs in the flow direction before they are immobilized on the substrate.  ...  First, we find that the degree of alignment can be controlled by the flow rate.  ... 
doi:10.1126/science.291.5504.630 pmid:11158671 fatcat:b4qxmxt5afgq3ae7dkts7qwcae

Connecting Visual Experiences using Max-flow Network with Application to Visual Localization [article]

A.H. Abdul Hafez, Nakul Agarwal, C.V. Jawahar
2018 arXiv   pre-print
Edges of the graph represent the cost of these matches. The problem of finding the best match is reduced to finding the minimum-cut surface, which is solved as a maximum flow network problem.  ...  This problem is solved by finding the maximum flow in a directed graph flow-network, whose vertices represent the matches between frames in the test and reference sequences.  ...  In contrast, we propose to use the flow network to achieve multiple image sequence matching. Our formulation is to find a maximum flow network or the min-cut surface in a 3D flow network.  ... 
arXiv:1808.00208v1 fatcat:puzbyxxgezckldjakeigg75mra
« Previous Showing results 1 — 15 out of 92,953 results