Results 31 to 40 of about 209,383 (273)

A coupled mitral valve -- left ventricle model with fluid-structure interaction

, 2017
Understanding the interaction between the valves and walls of the heart is important in assessing and subsequently treating heart dysfunction. With advancements in cardiac imaging, nonlinear mechanics and computational techniques, it is now possible to ...
Brown, André EX, Ch'ng, Quee-Lim, Currie, Michael, Grundy, Laura J, Hokanson, Jim, Javer, Avelino, Kerr, Rex, Lee, Chee Wai, Li, Chris, Li, Kezhi, Schafer, William R, Yemini, Eviatar   +11 more
core   +3 more sources

Passive Pre-Chamber Spark Plug for Future Gasoline Combustion Systems with Direct Injection

, 2018
The challenge of using a pre-chamber spark plug for future gasoline combustion processes with direct injection is, on the one hand, to realize an ignitable mixture in the pre-chamber at low load and speed. On the other hand, at high speed and high load, keeping component temperatures have to be kept low in order to prevent irregular combustions (pre ...
Blankmeister, Matthias, Alp, Muhammed, Shimizu, Eriko   +2 more
openaire   +3 more sources

Al–Cu Composite Casting of Laser‐Deoxidized Copper: Bonding, Interfacial Chemistry, and Thermal Conductivity

Advanced Engineering Materials, EarlyView.
This study investigates laser‐based oxide removal of Cu inserts in oxygen‐free conditions and examines long‐term oxidation kinetics and surface chemistry under different atmospheres via X‐ray photoelectron spectroscopy. Al–Cu compound casting with differently oxidized surfaces is performed, and intermetallic phase formation, morphology, and thermal ...
Timon Steinhoff, Finn‐Lennard Janthur, Sascha Zimmermann, Sarah Seffer, Jörg Hermsdorf, René Gustus, Ludger Overmeyer, Wolfgang Maus‐Friedrichs, Hans Jürgen Maier, Christian Klose   +9 more
wiley   +1 more source

Combustion Characteristics of a Hydrogen-Fueled TJI Engine under Knocking Conditions

Energies
The use of a two-stage combustion system in a hydrogen-fueled engine is characteristic of modern internal combustion engines. The main problem with hydrogen combustion in such systems is knocking combustion.
Ireneusz Pielecha, Filip Szwajca
doaj   +1 more source

Experimental active and passive dosimetry systems for the NASA Skylab program [PDF]

, 1972
Active and passive dosimetry instrumentation to measure absorbed dose, charged particle spectra, and linear energy transfer spectra inside the command module and orbital workshop on the Skylab program were developed and tested.
Ainsworth, G. C., Janni, J. F., Schneider, M. F.   +2 more
core   +1 more source

Characterization of Alkali Metal Dispensers and Non-Evaporable Getter Pumps in Ultra-High Vacuum Systems for Cold Atomic Sensors

, 2012
A glass ultrahigh vacuum chamber with rubidium alkali metal dispensers and non-evaporable getter pumps has been developed and used to create a cold atomic sample in a chamber that operates with only passive vacuum pumps.
David B. Fenner, David R. Scherer, Joel M. Hensley, Mitchell A. C. G., Saksaganskii G. L.   +4 more
core   +1 more source

An evaluation of personal cooling systems for reducing thermal strain whilst working in chemical/biological protective clothing [PDF]

, 2019
© 2019 The Authors. Published by Frontiers Media. This is an open access article available under a Creative Commons licence. The published version can be accessed at the following link on the publisher’s website: https://doi.org/10.3389/fphys.2019 ...
Adams, Agostoni, Andersen, Armstrong, Bach, Bates, Borg, Bouchama, Caldwell, Carter, Carter, Casa, Chan, Chan, Cheung, Chou, Cohen, Cotter, Du Bois, Duffield, Duncan, Faff, Gagge, Glitz, Goforth, Gubernot, Hamlin, Hanna, Hardy, Hasegawa, Hostler, House, Jay, Kenney, Kenny, Kenny, Maley, McEntire, McGregor, McLellan, Mills, Minett, Mokhtari Yazdi, Montain, Morrison, Morrissey, Nunfam, Nybo, Phuong, Pryor, Selkirk, Siegel, Smolander, Taylor, Taylor, Vallerand, Watkins   +56 more
core   +4 more sources

Measurement of the air-to-fuel ratio inside a passive pre-chamber of a fired spark-ignition engine [PDF]

Automotive and Engine Technology, 2020
AbstractThis paper investigates the local air-to-fuel ratio measurement within the pre-chamber of a spark-ignition engine by determining the absorption of light from hydrocarbons using an infrared sensor. The measurement was performed during fired and motored engine operation points and compared to the more common exhaust lambda measurements.
Nicolas Wippermann, Olaf Thiele, Olaf Toedter, Thomas Koch   +3 more
openaire   +3 more sources

Laser‐Induced Graphene from Waste Almond Shells

Advanced Functional Materials, EarlyView.
Almond shells, an abundant agricultural by‐product, are repurposed to create a fully bioderived almond shell/chitosan composite (ASC) degradable in soil. ASC is converted into laser‐induced graphene (LIG) by laser scribing and proposed as a substrate for transient electronics.
Yulia Steksova, Anna Chiara Bressi, Marina Galliani, Attilio Marino, Gianni Ciofani, Eduardo Machado‐Charry, Hilda Gomez Bernal, Alessandra Francini, Luca Sebastiani, Francesco Greco   +9 more
wiley   +1 more source

Assessment of the Use of a Passive Pre-Chamber in a Marine Engine Fueled with Ammonia–Hydrogen Mixtures

Energies
This study investigates the combustion process in a marine spark-ignition engine fueled with an ammonia–hydrogen blend (15% hydrogen by volume) using a passive pre-chamber.
Gabriele D’Antuono, Enzo Galloni, Davide Lanni, Gianpaolo D’Andrea, Gustavo Fontana   +4 more
doaj   +1 more source