Results 51 to 60 of about 467,438 (306)

Cancer Studies under Space Conditions: Finding Answers Abroad

Biomedicines, 2021
In this review article, we discuss the current state of knowledge in cancer research under real and simulated microgravity conditions and point out further research directions in this field. Outer space is an extremely hostile environment for human life,
José Luis Cortés-Sánchez, Jonas Callant, Marcus Krüger, Jayashree Sahana, Armin Kraus, Bjorn Baselet, Manfred Infanger, Sarah Baatout, Daniela Grimm   +8 more
doaj   +1 more source

Enhancing Corrosion Resistance and Mechanical Strength of 3D‐Printed Iron Polylactic Acid for Marine Applications via Laser Surface Texturing

Advanced Engineering Materials, EarlyView.
Laser surface texturing significantly improves the corrosion resistance and mechanical strength of 3D‐printed iron polylactic acid (Ir‐PLA) for marine applications. Optimal laser parameters reduce corrosion by 80% and enhance tensile strength by 25% and ductility by 15%.
Mohammad Rezayat, Mojtaba Karamimoghadam, Mohammadreza Lalegani Dezaki, Ali Zolfagharian, Giuseppe Casalino, Antonio Mateo, Mahdi Bodaghi   +6 more
wiley   +1 more source

Primordial Black Hole: Mass and Angular Momentum Evolution

, 2008
The evolution of the primordial low mass black hole (PBH) in hot universe is considered. Increase of mass and decrease of PBH spin due to the accretion of radiation dominated matter are estimated with using of results of numerical simulation of PBH ...
A. G. Doroshkevich, D. Carr, D. K. Nadezhin, G. S. Bisnovatyi-Kogan, G. S. Bisnovatyi-Kogan, G. S. Bisnovatyi-Kogan, O. Yu. Tsupko, P. J. Young, P. J. Young, V. P. Frolov, Ya. B. Zel’dovich, Ya. B. Zel’dovich, Ya. B. Zel’dovich   +12 more
core   +1 more source

Micromechanical Characterization of 316L‐V4E Steel Transitions Produced by Electron Beam Powder Bed Fusion with Dual‐Hopper Alternating Layer Strategy

Advanced Engineering Materials, EarlyView.
This work applies High‐Speed Nanoindentation to study multi‐material transitions in powder bed fusion–electron beam melting components. The aim is to assess the mechanical gradients and interfacial behavior between American iron and steel institute 316L stainless steel and V4E tool steel in additively manufactured structures.
Laia Ortiz‐Membrado, William Sjöström, Francesc Barberà Flichi, Carlos Botero, Anton S. Tremsin, Antonio Mateo, Emilio Jiménez‐Piqué   +6 more
wiley   +1 more source

Structural properties of a new class of stellar structures in modified teleparallel gravity

Frontiers in Astronomy and Space Sciences, 2023
This paper explores new neutron star models based on spherically symmetric space–time. We take into account the gravitational effects of f(T,T) gravity, in which T is the torsion and T is the trace of the energy–momentum tensor.
Aylin Caliskan, Rana Muhammad Zulqarnain, Ertan Güdekli, Imran Siddique, Hijaz Ahmad, Hijaz Ahmad, Hijaz Ahmad, Sameh Askar   +7 more
doaj   +1 more source

Gravitation and Duality Symmetry

, 2005
By generalizing the Hodge dual operator to the case of soldered bundles, and working in the context of the teleparallel equivalent of general relativity, an analysis of the duality symmetry in gravitation is performed.
A. L. BARBOSA, Ashtekar A., de Andrade V. C., de Andrade V. C., Deser S., Hayashi K., Henneaux M., J. G. PEREIRA, Kobayashi S., Konopleva N. P., V. C. DE ANDRADE, Weitzenböck R.   +11 more
core   +1 more source

Formation of Dust Clumps with Sub-Jupiter Mass and Cold Shadowed Region in Gravitationally Unstable Disk around Class 0/I Protostar in L1527 IRS [PDF]

, 2022
Satoshi Ohashi, Riouhei Nakatani, Hauyu Baobab Liu, Hiroshi Kobayashi, Yichen Zhang, Tomoyuki Hanawa, Nami Sakai   +6 more
openalex   +1 more source

Evaluation of the Potential of Laser Shock Peening Compared with Cold Expansion for Improving Fatigue Resistance of Riveted Lap Joints of Aerospace Grade 7175 Al Alloy

Advanced Engineering Materials, EarlyView.
This study investigates laser shock peening for enhancing fatigue performance of riveted aerospace aluminum joints. A comparative approach with cold expansion combines fatigue testing and synchrotron X‐ray methods. Integrating mechanical testing with residual stress and strain characterization provides insights into how different treatments affect the ...
Ogün Baris Tapar, David Osman Busse, Maximilian Sprengel, Domenico Furfari, Marc‐André Nielsen, Guilherme Abreu Faria, Jérémy Epp   +6 more
wiley   +1 more source

Motion of a rigid dumbbell with a flywheel in a central gravitational field

RUDN Journal of Engineering Research, 2022
The article introduces theoretical studies of space flight of the dumbbell. A description of the general qualitative picture of the possibility of implementing the non-reactive principle of motion of an extended body in a central gravitational field is ...
Sergei A. Kupreev, Vitaly M. Melnikov, Oleg E. Samusenko, Yuri A. Bondarenko, Pavel A. Yablonovsky   +4 more
doaj   +1 more source

Probing gravitation with pulsars

, 2012
Radio pulsars are fascinating and extremely useful objects. Despite our on-going difficulties in understanding the details of their emission physics, they can be used as precise cosmic clocks in a wide-range of experiments -- in particular for probing ...
Kramer, Michael
core   +1 more source