Results 61 to 70 of about 604,637 (265)

A New Technique for Quality Assessment of Railway Ballast Materials [PDF]

International Journal of Railway Research, 2018
The influence of main quality tests on the overall quality of railway ballast materials is assessed in this study. The need to integrate all acceptance tests in a unified manner for precise evaluation of ballast quality is identified, and a technique of ...
Masoud Fathali, Fereidoon Moghadas Nejad, Morteza Esmaeili   +2 more
doaj  

Partition Learning for Multiagent Planning

Journal of Robotics, 2012
Automated surveillance of large geographic areas and target tracking by a team of autonomous agents is a topic that has received significant research and development effort. The standard approach is to decompose this problem into two steps.
Jared Wood, J. Karl Hedrick
doaj   +1 more source

Biophysical approaches for studying viral entry

FEBS Letters, EarlyView.
Viruses infect all living organisms and have been responsible for major epidemics and pandemics. Their ongoing evolutionary battle with host defenses creates a constant need for improved tools to study viral behavior. Advancing methods to probe viral attachment, fusion, and genome release deepen our understanding of how infections begin and support the
Inbar Yosibash, Raya Sorkin
wiley   +1 more source

A Novel Approach of Identifying Railway Track Rail’s Modal Frequency From Wheel-Rail Excitation and Its Application in High-Speed Railway Monitoring

IEEE Access, 2019
High-speed railway track defects such as rail corrugation, wheel polygonal wear, and rail fastener clip failure are closely related to the modal frequency of the track structure.
Bolun An, Liang Gao, Tao Xin, Guorong Xiang, Ji Wang   +4 more
doaj   +1 more source

Tracking a large number of objects from multiple views [PDF]

2009 IEEE 12th International Conference on Computer Vision, 2009
We propose a multi-object multi-camera framework for tracking large numbers of tightly-spaced objects that rapidly move in three dimensions. We formulate the problem of finding correspondences across multiple views as a multidimensional assignment problem and use a greedy randomized adaptive search procedure to solve this NP-hard problem efficiently ...
Wu, Zheng, Hristov, Nickolay I., Hedrick, Tyson L., Kunz, Thomas H., Betke, Margrit   +4 more
openaire   +1 more source

Salmonella lipopolysaccharide‐containing supported lipid bilayers as platforms to study bacteriophage interactions

FEBS Letters, EarlyView.
We present robust protocols for the preparation of supported lipid bilayers (SLBs) incorporating either Salmonella smooth LPS or outer membrane vesicles (OMVs). We use a combination of quartz crystal microbalance with dissipation (QCM‐D) and fluorescence microscopy to both characterize the SLBs of various compositions and to probe their interactions ...
Hudson P. Pace, Alyssa Borges, Charles Arnaud, Tove Karlsson, Nina K. Bröker, Stefanie Barbirz, Marta Bally   +6 more
wiley   +1 more source

Determination of the level of separate rail failure using the indicator of their reliability

MATEC Web of Conferences, 2018
During the operation, the upper railway track structure constantly tends to age, which includes the increasing number of failures. This process is controlled by the track maintenance system, which provides for the current maintenance of the track in a ...
Shtompel Anatolii, Skoryk Oleksii, Novikov Vadym, Kravchenko Yuliia, Korostelov Yevhen   +4 more
doaj   +1 more source

From mice to humans—divergent strategies for intestinal homeostasis and regeneration

FEBS Letters, EarlyView.
Recent advances such as organoid genome editing, xenotransplantation, imaging, and whole‐genome sequencing have enabled direct studies of human intestinal stem cells (ISCs). These studies reveal species‐specific features, including slower ISC proliferation, distinct injury responses, slower somatic mutation accumulation in humans, and an inverse ...
Keiko Ishikawa, Shinya Sugimoto, Toshiro Sato   +2 more
wiley   +1 more source

Modelling stem cell differentiation related processes—A practical overview for biologists

FEBS Letters, EarlyView.
Stem cell differentiation is complex and difficult to control experimentally. This review introduces suitable computational modelling approaches that can support stem cell research, from mechanistic ODE and abstract models to multiscale and deep learning methods.
Ricco Zeegelaar, Xinqi Yan, Lucas F. Jansen Klomp, Stefano Schivo, Janine N. Post   +4 more
wiley   +1 more source

Quantifying erasure and interference from adjacent tracks in heat-assisted magnetic recording [PDF]

AIP Advances
With track spacing in heat-assisted magnetic recording approaching the width of the reader and the thermal spot, the areal density capability is significantly penalized by interference and erasure from adjacent tracks.
Xuan Zheng, Walter R. Eppler, Jay Loven, Jason Gadbois   +3 more
doaj   +1 more source