Relevant bibliographies by topics / Approximately Rigid Formations

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  1. Journal articles
  2. Dissertations / Theses
  3. Conference papers

Academic literature on the topic 'Approximately Rigid Formations'

Author: Grafiati
Published: 4 June 2021
Last updated: 10 February 2022

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Journal articles on the topic "Approximately Rigid Formations"

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Shafigullin, Lenar, Natalya Romanova, Gulnaz Shafigullina, and Yulia Sokolova. "Influence of the Expandable Graphite on the Thermal properties of a Rigid Polyurethane Foam for construction." E3S Web of Conferences 263 (2021): 01009. http://dx.doi.org/10.1051/e3sconf/202126301009.

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In this paper, low-combustible composites were made by adding 0.8-25 wt% of expandable graphite to rigid polyurethane foams (PUF) to ensure effective and safe usage of building materials made of PUFs. Thermal gravimetric analysis (TGA) was used to study thermal properties and effectiveness of the resulting low-combustible composites in construction. The analysis of TGA curves of the studied composites can be interpreted as a two-stage process: acid-catalyzed degradation of PUF and formation of an intumescent char layer. A dense intumescent layer can provide an effective prevention of heat tran
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Vara, DC, AM Leal-Zanchet, and HM Lizardo-Daudt. "Embryonic development of Girardia tigrina (Girard, 1850) (Platyhelminthes, Tricladida, Paludicola)." Brazilian Journal of Biology 68, no. 4 (2008): 889–95. http://dx.doi.org/10.1590/s1519-69842008000400027.

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The embryonic development of freshwater triclads is mainly known from studies of species of Dendrocoelum, Planaria, Polycelis, and, more recently, Schmidtea. The present study characterizes the development of Girardia tigrina (Girard, 1850) by means of optical microcopy using glycol methacrylate semi-thin sections. 94 cocoons were collected in the period from laying to hatching, with intervals of up to twenty-four hours. The sequence of morphological changes occurring in the embryo permitted the identification of nine embryonic stages. At the time of cocoon laying, numerous embryos were disper
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Zhang, A. M., P. Cui, J. Cui, and Q. X. Wang. "Experimental study on bubble dynamics subject to buoyancy." Journal of Fluid Mechanics 776 (July 6, 2015): 137–60. http://dx.doi.org/10.1017/jfm.2015.323.

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This paper is concerned with the dynamics of large bubbles subject to various strengths of buoyancy effects, which are associated with applications for underwater explosion. The bubble is produced by electric discharge in a low-pressure tank to enhance the buoyancy effects. Experiments are carried out for a bubble in an infinite field, below a free surface and above a rigid boundary. The effects of buoyancy are reflected by the dimensionless parameter ${\it\delta}=\sqrt{{\it\rho}gR_{m}/(p_{amb}-p_{v})}$, where $R_{m}$, $p_{amb}$, $p_{v}$, ${\it\rho}$ and $g$ are the maximum bubble radius, ambi
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An, Shanshan, Xiaoxiao Zhang, Yunfan Shi, et al. "High glycine content in TDP-43: a potential culprit in limbic-predominant age-related TDP-43 encephalopathy." Journal of International Medical Research 48, no. 6 (2020): 030006052092985. http://dx.doi.org/10.1177/0300060520929853.

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Numerous risk factors for heart disease or dementia harbor over 10% valine plus glycine content. Interestingly, TDP-43 contains 6.0% valine and 13.3% glycine, and the buildup of this protein in the brains of patients with limbic-predominant age-related TDP-43 encephalopathy has dire consequences. The two γ-methyl groups in valine enable hyperconjugation, which enhances the van der Waals interaction between its side group and the carbonyl carbon. This extends the C=O bond length, and this weakened C=O bond augments the secondary chemical bonding of the carbonyl oxygen atom to cations. This, in
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Secomb, T. W., and A. W. El-Kareh. "A Model for Motion and Sedimentation of Cylindrical Red-Cell Aggregates During Slow Blood Flow in Narrow Horizontal Tubes." Journal of Biomechanical Engineering 116, no. 3 (1994): 243–49. http://dx.doi.org/10.1115/1.2895726.

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When blood flows slowly in a narrow tube, red-cell aggregation results in formation of an approximately cylindrical “core” of red cells, which moves as a rigid body. The core is denser than the surrounding fluid, and sedimentation is observed in horizontal tubes. To model this, the Stokes flow of a fluid surrounding a long solid cylinder (the core) contained in a long hollow cylinder (the tube) is considered. The cylinder axes are parallel but not coincident. An exact analytic expression for the resistance coefficient for motion perpendicular to the axes is given. This coefficient increases ra
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Josserand, M. A., and G. C. Lauchle. "Modeling the Wavevector-Frequency Spectrum of Boundary-Layer Wall Pressure During Transition on a Flat Plate." Journal of Vibration and Acoustics 112, no. 4 (1990): 523–34. http://dx.doi.org/10.1115/1.2930138.

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A spectral model for the wall-pressure fluctuations induced on a zero pressure gradient, flat, rigid surface by a transitioning boundary layer at low Mach number is developed in this paper. The central assumption used in this modeling is that the space-time statistics associated with the formation, convection, and interaction of turbulent spots in a naturally occurring boundary-layer transition are independent of the space-time statistics of the wall-pressure fluctuations that are induced by the turbulence in the individual spots. Space-time correlations for the spots were determined experimen
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Goffin, Jérôme M., Philippe Pittet, Gabor Csucs, Jost W. Lussi, Jean-Jacques Meister та Boris Hinz. "Focal adhesion size controls tension-dependent recruitment of α-smooth muscle actin to stress fibers". Journal of Cell Biology 172, № 2 (2006): 259–68. http://dx.doi.org/10.1083/jcb.200506179.

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Expression of α-smooth muscle actin (α-SMA) renders fibroblasts highly contractile and hallmarks myofibroblast differentiation. We identify α-SMA as a mechanosensitive protein that is recruited to stress fibers under high tension. Generation of this threshold tension requires the anchoring of stress fibers at sites of 8–30-μm-long “supermature” focal adhesions (suFAs), which exert a stress approximately fourfold higher (∼12 nN/μm2) on micropatterned deformable substrates than 2–6-μm-long classical FAs. Inhibition of suFA formation by growing myofibroblasts on substrates with a compliance of ≤1
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WEBB, PAUL W., DOMINIQUE SIMS, and WILLIAM W. SCHULTZ. "The Effects of an Air/Water Surface on the Fast-Start Performance of Rainbow Trout (Oncorhynchus Mykiss)." Journal of Experimental Biology 155, no. 1 (1991): 219–26. http://dx.doi.org/10.1242/jeb.155.1.219.

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Fast-start performance of rainbow trout (mass 0.187±0.022kg; mean±2S.E., N= 10) was measured in water of various depths. Relative water depth was defined as z/B, where z is the water depth measured from the air/water surface to the longitudinal midline of the body and B is the span of the caudal fin, 0.062±0.004m. Relative water depths (at absolute depths) tested were; 0.31 (at 0.05m), 1.11 (at 0.1m), 1.92 (at 0.15m), 2.73 (at 0.2m) and 7.56 (at 0.5m). Performance was defined in terms of the motion of the centre of mass as measured by the turning radius and the cumulative distance travelled in
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Boughton, Philip, Y. Chen, C. Thompson, G. Roger, Jari Hyvarinen, and Andrew Ruys. "Development of a Bioabsorbable Glass-Reinforced-Glass Intra-Osseous Scaffold for Fracture Healing." Journal of Biomimetics, Biomaterials and Tissue Engineering 9 (January 2011): 81–91. http://dx.doi.org/10.4028/www.scientific.net/jbbte.9.81.

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Intramedullary (IM) nails are routinely used to stabilize long bone fractures. They can however lead to stress shielding, pain, migration, obstruct hematopoietic tissue, become a loci for infection, and require subsequent surgical retrieval. Novel intra-osseous scaffold (IOS™) prototypes for fracture healing have been developed to function as a regenerative scaffold to enhance callous formation under mechanically stabilized conditions then resorb. Prototype fixation pins and rod systems were formed from glass-reinforced-glass. Flexion, torsion and shear tests were performed to evaluate the com
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Ortiz-Barajas, Diana L., Johan A. Arévalo-Prada, Octavio Fenollar, Yesid J. Rueda-Ordóñez, and Sergio Torres-Giner. "Torrefaction of Coffee Husk Flour for the Development of Injection-Molded Green Composite Pieces of Polylactide with High Sustainability." Applied Sciences 10, no. 18 (2020): 6468. http://dx.doi.org/10.3390/app10186468.

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Coffee husk, a major lignocellulosic waste derived from the coffee industry, was first ground into flour of fine particles of approximately 90 µm and then torrefied at 250 °C to make it more thermally stable and compatible with biopolymers. The resultant torrefied coffee husk flour (TCHF) was thereafter melt-compounded with polylactide (PLA) in contents from 20 to 50 wt% and the extruded green composite pellets were shaped by injection molding into pieces and characterized. Although the incorporation of TCHF reduced the ductility and toughness of PLA, filler contents of 20 wt% successfully yie
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Dissertations / Theses on the topic "Approximately Rigid Formations"

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Yadlapalli, Sai Krishna. "On the information flow required for the scalability of the stability of motion of approximately rigid formation." Thesis, Texas A&M University, 2005. http://hdl.handle.net/1969.1/2364.

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It is known in the literature on Automated Highway Systems that information flow can significantly affect the propagation of errors in spacing in a collection of vehicles. This thesis investigates this issue further for a homogeneous collection of vehicles. Specifically, we consider the effect of information flow on the propagation of errors in spacing and velocity in a collection of vehicles trying to maintain a rigid formation. The motion of each vehicle is modeled using a Linear Time Invariant (LTI) system. We consider undirected and connected information flow graphs, and assume that that
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Conference papers on the topic "Approximately Rigid Formations"

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Lantz, Jonas, Johan Renner, and Matts Karlsson. "Wall Shear Stress in an MRI-Based Subject-Specific Human Aorta Using Fluid-Structure Interaction." In ASME 2010 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2010. http://dx.doi.org/10.1115/sbc2010-19346.

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Wall shear stress (WSS) is well established as an indicator of increased risk for development of atherosclerotic plaques, platelet activation and thrombus formation [1]. Prediction and simulation of the sites of wall shear stresses that are deemed dangerous before intervention would be of great aid to the surgeon. However, the geometries used for these types of simulations are often approximated to be rigid. To more accurately capture the flow and arterial wall response of a realistic human aorta, fluid-structure interaction (FSI) which allows movement of the wall, is needed. Hence, the pressu
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Banshchikov, A., and A. Vetrov. "Application of software tools for symbolic description and modeling of mechanical systems." In The International Workshop on Information, Computation, and Control Systems for Distributed Environments. Crossref, 2020. http://dx.doi.org/10.47350/iccs-de.2020.03.

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The paper presents two software tools (graphical editor and software package). The editor is designed for the formation of a symbolic description of a mechanical system using the Lagrange formalism. A system of the absolutely rigid bodies connected by joints is considered as a mechanical system. The editor is a user interface by which one sets the structure of the interconnection of bodies (system configuration) as well as the geometric and kinematic characteristics for each body of the system. The created structure and the entered data are automatically presented in the form of a text file, w
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Gupta, Deepika, Anirudh Udupa, and Koushik Viswanathan. "Some Quantitative Analogies Between Large-Strain Plasticity and Rectilinear Fluid Flow." In ASME 2020 15th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/msec2020-8276.

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Abstract The mechanics of chip formation involves a complex interplay between surface plastic flow, material microstructure and tool-chip interface dynamics. At the continuum scale, this process has often been approximated as being one of pure shear along a very narrow zone — the shear plane. The primary assumption behind this approximation is that of steady or time-independent plastic flow. This approximation addresses the exception rather than the rule, since most metal cutting processes involve unsteady time-dependent plastic flows. In this work, we attempt to develop parallels with an anal
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Skadsem, Hans Joakim, Arild Saasen, and Stein Håvardstein. "Casing Centralization in Irregular Wellbores." In ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/omae2017-61106.

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Wellbore irregularities can cause excessive mechanical friction forces while attempting to land casing strings, and unfavorable conditions for primary cementing of casing strings. In an eccentric annulus, the fluid velocity is largest in the wide section of the annulus. The drilling fluid on the narrow side of the annulus may be immobilized due to the lower wall shear stress in this section of the annulus. A direct consequence for the primary cementing operation is the potential for having residual drilling fluid between casing and formation, and thereby failing to achieve zonal isolation and
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Journal articles
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