Results 101 to 110 of about 286,701 (303)

Static Strength Analysis and Optimization of the Roller Cone Bit Bearing Structure

Shiyou jixie, 2015
The tricone bit is prone to having a failure bearing under high WOB and high RPM.To improve the roller cone bit bearing structure stress,increase the tooth placement space and the thickness of the shell,a three dimensional model has been established ...
Li Bin, Yang Shuang, Shen Huanyu, Zhang Dongyang   +3 more
doaj  

Investigations Into Bioenergetic Neuroprotection of Cone Photoreceptors: Relevance to Retinitis Pigmentosa

Frontiers in Neuroscience, 2019
Recent studies suggest cone degeneration in retinitis pigmentosa (RP) may result from intracellular energy depletion. We tested the hypothesis that cones die when depleted of energy by examining the effect of two bioenergetic, nutraceutical agents on ...
Daniel S. Narayan, Glyn Chidlow, John P. M. Wood, Robert J. Casson   +3 more
doaj   +1 more source

Crescent singularities and stress focusing in a developable cone

, 1998
we investigate developable cones (d-cones) topology and mechanical properties. We found that for a sample of a finite thickness the singularity is never pointlike but has a spatial extension in form of a crescent. The variations of the sheet local curvature versus the distance from the d-cone tip for all deformations showed that the d-cone tip is ...
Chaieb, Sahraoui, Melo, Francisco
openaire   +2 more sources

Sensorized Engineered Tissues with Built‐in Thermoregulation and Nutrient Supply

Advanced Functional Materials, EarlyView.
This work introduces a granular hydrogel‐based tissue engineering platform that includes a closed‐loop temperature control to maintain 37°C and sustainably releases nutrients, thereby enabling cells to retain a high viability even if stored at room temperature for up to 24 h.
Antonia Georgopoulou, Jakob Schreiner, Miriam Filippi, Aiste Balciunaite, Robert K. Katzschmann, Esther Amstad   +5 more
wiley   +1 more source

Shear induced normal stress differences in aqueous foams

, 2006
A finite simple shear deformation of an elastic solid induces unequal normal stresses. This nonlinear phenomenon, known as the Poynting effect, is governed by a universal relation between shear strain and first normal stresses difference, valid for non ...
Cohen-Addad, Sylvie, Hohler, Reinhard, Labiausse, Vincent   +2 more
core   +3 more sources

Dispensing Volumetric Additive Manufacturing

Advanced Functional Materials, EarlyView.
Dispensing volumetric additive manufacturing (DVAM) prints 3D structures inside a photocurable resin droplet suspended from the tip of a glass pipette, enabling sequential printing without resin vats or manual part removal. Real‐time droplet profiling and ray‐tracing‐based correction compensate for optical distortion at the curved resin‐air interface ...
Hongryung Jeon, Yunsoo Lee, Seobin Park, Kyung‐Hwan Kim, Junyoung Seo, Im Doo Jung   +5 more
wiley   +1 more source

Application of Micro Teeth Mark Slips in the Packer

Shiyou jixie, 2016
The packer anchoring mechanism has shortcomings in the structure and slip anchoring performance, especially that the slips will cause great damage to the surface of the casing, which not only affects the packer performance, but also could result in ...
Liu Yuming, Hao Zhouzheng, Ma Yingming, Wang Yanxue, Zhao Haibin   +4 more
doaj  

Cause Analysis and Countermeasures of a Breakdown Failure of Flexible 110 kV Cable Terminal

E3S Web of Conferences, 2018
disintegration examination and analysis are employed in flexible terminal breakdown of 110 kV XLPE insulated cables. It is considered that the main reason of breakdown is the separation of the stress cone of the terminal and the fracture of the semi ...
Huang Feng
doaj   +1 more source

Anomalous Conical Di-jet Correlations in pQCD vs AdS/CFT

, 2009
We propose an identified heavy quark jet observable to discriminate between weakly coupled pQCD and strongly coupled AdS/CFT models of quark gluon plasma dynamics in ultra-relativistic nuclear collisions at RHIC and LHC energies.
Abelev, Adams, Adare, Adler, Aharony, Asakawa, Asakawa, Barbara Betz, Bernard, Betz, Betz, Casalderrey-Solana, Casalderrey-Solana, Casalderrey-Solana, Chaudhuri, Chesler, Chesler, Cooper, Danielewicz, Dominguez, Elze, Eskola, Fries, Fries, Fries, Friess, Giorgio Torrieri, Gubser, Gubser, Gubser, Gubser, Gubser, Gubser, Gubser, Gubser, Gyulassy, Gyulassy, Heinz, Herzog, Horowitz, Jorge Noronha, Kovtun, Maldacena, Miklos Gyulassy, Mueller, Neufeld, Neufeld, Neufeld, Noronha, Noronha, Noronha, Noronha, Policastro, Rischke, Rischke, Rischke, Rischke, Selikhov, Selikhov, Shuryak, Stoecker, Ulery, Witten, Witten, Yarom   +64 more
core   +1 more source

LL‐37 Driven Phase Transition and Stacking in Oligolamellar Gram‐Negative Bacterial Membrane Models

Advanced Functional Materials, EarlyView.
This work establishes oligolamellar bacterial membrane models to investigate how LL‐37 disrupts the complex dual‐bilayer architecture of Gram‐negative bacteria. Combining SAXS, cryo‐TEM, electrophoretic mobility measurements, and coarse‐grained simulations, it reveals cardiolipin‐driven phase transitions leading to bicelle‐like structures and membrane ...
Bettina Tran, Diane C.A. Lima, Linda Sandblad, Madeleine Ramstedt, Thereza A. Soares, Stefan Salentinig   +5 more
wiley   +1 more source