Results 41 to 50 of about 588,717 (296)

Probing equilibrium glass flow up to exapoise viscosities [PDF]

, 2015
Glasses are out-of-equilibrium systems aging under the crystallization threat. During ordinary glass formation, the atomic diffusion slows down rendering its experimental investigation impractically long, to the extent that a timescale divergence is ...
Cerullo, G., Ferrante, C., Pogna, E. A. A., Rodríguez-Tinoco, C., Rodríguez-Viejo, J., Scopigno, T.   +5 more
core   +2 more sources

Empirical formulation for bead shape prediction in direct energy deposition

Mechanics & Industry
In the metal deposition process, the bead shape plays a critical role in determining the precision and mechanical properties of the final product. Therefore, prior to additive manufacturing, it is essential to determine an optimal bead shape.
Baek Gyeong-Yun
doaj   +1 more source

Compensation for Uneven Surfaces When Building Laser Deposited Structures [PDF]

, 2004
Direct Laser Deposition (DLD) is a blown-powder laser deposition process that can be used to quickly produce, modify or repair fully-dense metallic parts by a layered manufacturing method. However, uneven substrate surfaces often cause variation in the
Fearon, E., Watkins, K. G.
core   +1 more source

Loose packings of frictional spheres

, 2010
We have produced loose packings of cohesionless, frictional spheres by sequential deposition of highly-spherical, monodisperse particles through a fluid. By varying the properties of the fluid and the particles, we have identified the Stokes number (St) -
Attard, Bernal, Borkent, Chaudhuri, Ciamarra, Courrech du Pont, Dong, Gao, Gondret, Greg R. Farrell, Jalali, Jerkins, K. Michael Martini, Kamien, Macrae, Majumder, Narayanan Menon, O'Hern, Onoda, Parker, Rutgers, Scott, Scott, Silbert, Song, Torquato, Weitz, Zhang   +27 more
core   +1 more source

Peptide‐based ligand antagonists block a Vibrio cholerae adhesin

FEBS Letters, EarlyView.
The structure of a peptide‐binding domain of the Vibrio cholerae adhesin FrhA was solved by X‐ray crystallography, revealing how the inhibitory peptide AGYTD binds tightly at its Ca2+‐coordinated pocket. Structure‐guided design incorporating D‐amino acids enhanced binding affinity, providing a foundation for developing anti‐adhesion therapeutics ...
Mingyu Wang, Grace Du, Charity Yongo‐Luwawa, Angelina Lu, Brett Kinrade, Kim Munro, Karl E. Klose, William D. Lubell, Peter Davies, Shuaiqi Guo   +9 more
wiley   +1 more source

Direct Evidence of Mg Incorporation Pathway in Vapor-Liquid-Solid Grown p-type Nonpolar GaN Nanowires

, 2015
Doping of III-nitride based compound semiconductor nanowires is still a challenging issue to have a control over the dopant distribution in precise locations of the nanowire optoelectronic devices.
Amirthapandian, S., Bera, S., Bhattacharya, Anirban, Dhara, Sandip, Pandian, Ramanathaswamy, Patsha, Avinash   +5 more
core   +2 more sources

Partitioning of laser energy during directed energy deposition

Additive Manufacturing, 2017
Abstract An energy balance that describes the transfer of energy is proposed for the laser-based directed energy deposition process. The partitioning of laser energy was experimentally measured and accurately validated using a special process calorimeter for Ti-6Al-4V and Inconel 625™ alloys. The total energy provided by the laser was partitioned as:
Frederick Lia, Joshua Park, Jay Tressler, Richard Martukanitz   +3 more
openaire   +1 more source

Mechanisms of parasite‐mediated disruption of brain vessels

FEBS Letters, EarlyView.
Parasites can affect the blood vessels of the brain, often causing serious neurological problems. This review explains how different parasites interact with and disrupt these vessels, what this means for brain health, and why these processes matter. Understanding these mechanisms may help us develop better ways to prevent or treat brain infections in ...
Leonor Loira, Sílvia Arroz‐Madeira, Cláudio A. Franco, Sara Silva Pereira   +3 more
wiley   +1 more source

Direct comparison of the performance of CZT detectors contacted with various metals

, 2005
Cadmium Zinc Telluride (CZT) achieves excellent spatial resolution and good energy resolution over the broad energy range from several keV into the MeV energy range.
Burger, A., Groza, M., Jung, I., Krawczynski, H., Perkins, J.   +4 more
core   +1 more source

Beam Energy Considerations for Gold Nano-Particle Enhanced Radiation Treatment [PDF]

, 2009
Purpose: A novel approach using nano technology enhanced radiation modalities is investigated. The proposed methodology uses antibodies labeled with organically inert metals with a high atomic number.
Heuvel, F. Van den, Locquet, J. P., Nuyts, S.   +2 more
core   +2 more sources