Results 81 to 90 of about 14,198 (266)

Design of active magnetic bearing rotors and their control method for passing through fourth bending critical speed

Mechanical Engineering Journal, 2019
These days, centrifugal compressors and other industrial turbomachines tend to be faster, downsized, and reduced in cost. If a technology can be established for operation of machines over higher critical speed using an active magnetic bearing, the number
Hiroyuki FUJIWARA, Kazutoshi YANAGIHARA, Osami MATSUSHITA, Osamu TOKUDA   +3 more
doaj   +1 more source

Wood Sawdust as a Low‐Cost Filler in Whole‐Tire Reclaimed Rubber: Mechanical Characterization and Factory‐Scale Cost Analysis

Journal of Applied Polymer Science, EarlyView.
Whole‐tire reclaimed rubber is upgraded with wood sawdust, a carpentry by‐product available at no cost, across loadings from 0 to 20 wt%. At 5 wt%, tensile strength, elongation, hardness, viscosity, and water absorption all stay within commercial specification, and real factory data show an annual production saving near $62,000 with no capital ...
Mohammed S. Matar, Faris Tarlochan, Sami E. Alkhatib, Abdullah Abdelhamid   +3 more
wiley   +1 more source

Analysis of the lateral vibrations of an unbalanced Jeffcott rotor

MATEC Web of Conferences, 2018
This paper examines experimentally and analytically the lateral vibrations of a Jeffcott rotor running at various unbalance states. Using a Bently Nevada RK-4 rotor kit, three states of eccentric mass unbalance were assumed in this study: 0.4g, 0.8g and ...
Alsaleh Ali, Ouakad Hassen M.
doaj   +1 more source

Flexibility within the Rotor and Stators of the Vacuolar H+-ATPase

PLoS ONE, 2013
The V-ATPase is a membrane-bound protein complex which pumps protons across the membrane to generate a large proton motive force through the coupling of an ATP-driven 3-stroke rotary motor (V1) to a multistroke proton pump (Vo). This is done with near 100% efficiency, which is achieved in part by flexibility within the central rotor axle and stator ...
Song C. F., Papachristos K., Rawson S., Huss M., Wieczorek H., Paci E., Trinick J., Harrison M. A., Muench S. P.   +8 more
openaire   +5 more sources

In Situ Generation of a Robust Gel Polymer Electrolyte From a Poly(Ethylene Carbonate)‐Hydrogenated Nitrile Butadiene Rubber Containing Thermoplastic Vulcanizate Electrolyte

Journal of Applied Polymer Science, EarlyView.
A gel polymer electrolyte thermoplastic vulcanizate (GPE–TPV) was prepared by blending HNBR and PEC by melt extrusion then thermally decomposing PEC to yield liquid EC. EC is absorbed into the crosslinked HNBR, yielding an electrolyte that is mechanically and electrochemically stable enough to permit cycling in a LiFePO4–Li half‐cell.
Rozita Sadeghzadeh, Gabrielle Foran, Julien Mimeault, Caroline St‐Antoine, Arnaud Prébé, Mickael Dollé   +5 more
wiley   +1 more source

Towards Accurate Prediction of Unbalance Response, Oil Whirl and Oil Whip of Flexible Rotors Supported by Hydrodynamic Bearings

Lubricants, 2016
Journal bearings are used to support rotors in a wide range of applications. In order to ensure reliable operation, accurate analyses of these rotor-bearing systems are crucial.
Rob Eling, Mathys te Wierik, Ron van Ostayen, Daniel Rixen   +3 more
doaj   +1 more source

On Nonlinear Rotor Dynamic Effects of Aerodynamic Bearings With Simple Flexible Rotors

Journal of Engineering for Gas Turbines and Power, 2007
Abstract The last decades have experienced a growing enhancement of aeronautical oil free turbomachinery. The classical linear approach of rotor dynamics commonly uses stiffness and damping coefficients to model journal bearings. In the present study, a nonlinear time dependant calculation is used for the dynamic simulation of a rotor ...
Bou-Saïd, Benyebka, Grau, Grégory, Iordanoff, Ivan   +2 more
openaire   +3 more sources

Real‐Time Biomass Estimation in High‐Density Yeast Fermentations Using Soft Sensor Modeling

Biotechnology and Bioengineering, EarlyView.
Accurate biomass measurements, both offline and online, are essential to improve prediction and control in yeast fermentation. This study develops regression‐based predictive models to correlate offline measurements (Dry Cell Weight and OD600 from a spectrophotometer) with online OD860 probe signals to provide accurate real‐time biomass estimations and
Ana G. Del Hierro, José Luis Checa‐Barrera, Juan A. Moreno‐Cid, Eoin Casey   +3 more
wiley   +1 more source

BODIPY‐based J‐aggregates: From supramolecular chemistry to NIR bioimaging and phototherapies

Bulletin of the Korean Chemical Society, EarlyView.
BODIPY dyes form ordered J‐aggregates through controlled supramolecular self‐assembly, producing narrow, red‐shifted absorption bands with small Stokes shifts. This review highlights design strategies governing J‐aggregation, structure–property relationships, and applications in sensing, bioimaging, and phototherapy, guiding functional BODIPY‐based ...
Pooja Sharma, Yeonkyeong Lee, Youngmi Kim   +2 more
wiley   +1 more source

Purification and concentration of model viruses using single‐pass tangential flow filtration

Biotechnology Progress, EarlyView.
Single‐pass TFF was developed for an enveloped and non‐enveloped virus for use in continuous downstream purification processes. Enveloped virus was concentrated and purified. Abstract The vaccine and viral vector industry is growing at an accelerated rate.
Luis Alberto Mejía‐Manzano, Lynn Manchester, Grace Wallis, Kan Wang, Bruce P. Lee, Michael Betenbaugh, Caryn L. Heldt   +6 more
wiley   +1 more source