Results 41 to 50 of about 127,749 (338)

Cervical Spinal Cord Magnetization Transfer Ratio and Its Relationship With Clinical Outcomes in Multiple Sclerosis

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective The cervical spinal cord (cSC) is highly relevant to clinical dysfunction in multiple sclerosis (MS) but remains understudied using quantitative magnetic resonance imaging (MRI). We assessed magnetization transfer ratio (MTR), a semi‐quantitative MRI measure sensitive to MS‐related tissue microstructural changes, in the cSC and its ...
Lisa Eunyoung Lee, Julien Cohen‐Adad, Irene M. Vavasour, Melanie Guenette, Katherine Sawicka, Neda Rashidi‐Ranjbar, Nathan Churchill, Akash Chopra, Adelia Adelia, Pierre‐Louis Benveniste, Anthony Traboulsee, Nathalie Arbour, Fabrizio Giuliani, Larry D. Lynd, Scott B. Patten, Alexandre Prat, Alice Schabas, Penelope Smyth, Roger Tam, Yunyan Zhang, Simon J. Graham, Mojgan Hodaie, Anthony Feinstein, Shannon Kolind, Tom A. Schweizer, Jiwon Oh, CanProCo Study Group   +26 more
wiley   +1 more source

Effects of Piston Bowl Geometry on Combustion and Emissions of a Four-Stroke Heavy-Duty Diesel Marine Engine

Applied Sciences, 2022
Piston bowl geometry plays an important role in the fuel/air mixing quality which has a direct influence on the performance and emission characteristics of the engine.
Van Chien Pham, Jeong Kuk Kim, Won-Ju Lee, Su-Jeong Choe, Van Vang Le, Jae-Hyuk Choi   +5 more
doaj   +1 more source

Design and development of auxiliary components for a new two-stroke, stratified-charge, lean-burn gasoline engine [PDF]

, 2005
A unique stepped-piston engine was developed by a group of research engineers at Universiti Teknologi Malaysia (UTM), from 2003 to 2005. The development work undertaken by them engulfs design, prototyping and evaluation over a predetermined period of ...
Abdul Aziz, Azhar, Abdul Latif, Zulkarnain, Abu Bakar, Rosli, Mohd. Noor, Alias, Mohd. Rohani, Jafri, Saat, Aminuddin   +5 more
core  

The Potential for Extracellular Vesicles in Nanomedicine: A Review of Recent Advancements and Challenges Ahead

Advanced Biology, EarlyView.
Extracellular vesicles (EVs) play a dual role in diagnostics and therapeutics, offering innovative solutions for treating cancer, cardiovascular, neurodegenerative, and orthopedic diseases. This review highlights EVs’ potential to revolutionize personalized medicine through specific applications in disease detection and treatment.
Farbod Ebrahimi, Anjali Kumari, Samaneh Ghadami, Saqer Al Abdullah, Kristen Dellinger   +4 more
wiley   +1 more source

Evaluation analysis of scavenging process of two-stroke marine diesel engine by experiment and simulation

Journal of Thermal Science and Technology, 2014
The performance of the two-stroke engine depends on the scavenging process, which affects air-fuel mixture and combustion. This paper presents results from experiments in which the timing of exhaust valve opening and closing was varied in two-stroke ...
Haiqiang LIU, Lin LU, Zhongjun WANG
doaj   +1 more source

Comparative Assessment and Parametric Optimisation of Large Marine Two-Stroke Engines with Exhaust Gas Recirculation and Alternative Turbocharging Systems

Journal of Marine Science and Engineering, 2022
Although the exhaust gas recirculation (EGR) technology has been proven effective to decrease the marine engine’s nitrogen oxides (NOx) emissions, it is associated with a considerable fuel consumption increase and challenges to the engine–turbocharger ...
Daoyi Lu, Gerasimos Theotokatos, Jundong Zhang, Hong Zeng, Keying Cui   +4 more
doaj   +1 more source

Characteristics of the Limit Cycle of a Reciprocating Quantum Heat Engine [PDF]

, 2004
When a reciprocating heat engine is started it eventually settles to a stable mode of operation. The approach of a first principle quantum heat engine toward this stable limit cycle is studied.
J. Wei, L. Diósi, R. A. Fischer, R. Alicki, Ronnie Kosloff, Tova Feldmann   +5 more
core   +1 more source

Modelling Atherosclerotic Plaque Cap Mechanics: Microcalcifications Reduce Mechanical Properties in Mesenchymal Stromal Cell‐Based Model

Advanced Biology, EarlyView.
This study develops a tissue‐engineered model of the atherosclerotic cap using human mesenchymal stromal cells (MSCs). After 2 weeks of culture to produce a collagenous matrix, a mineralizing medium induces microcalcifications over 4 weeks. These constructs, imaged with second harmonic generation microscopy, lead to reduced ultimate stress at rupture ...
Imke L. Jansen, Deniz Şahin, Frank J.H. Gijsen, Eric Farrell, Kim van der Heiden   +4 more
wiley   +1 more source

Design and development of piston-controlled intake port for 4-stroke engine [PDF]

, 2008
In a two stroke engine, piston control the intake port opening and closing that combine the intake and compression stroke in 1800 crank rotation. The operational concept of two stroke engine is applied to the existing four stroke engine cylinder head ...
Amran, Kaharudin
core  

A Case‐Based Reasoning Approach to Model Manufacturing Constraints for Impact Extrusion

Advanced Engineering Materials, EarlyView.
A hybrid modeling approach is presented that combines constraint‐based process modeling and case‐based reasoning. The model formalizes manufacturing constraints and integrates simulation data to model complex manufacturing processes. The approach supports manufacturability analysis during product design through an adaptive modeling environment.
Kevin Herrmann, Eduard Ortlieb, Hendrik Wester, Paul Christoph Gembarski, Bernd‐Arno Behrens, Roland Lachmayer   +5 more
wiley   +1 more source