Results 31 to 40 of about 771,088 (241)

Generalized Chaplygin Gas in a modified gravity approach

, 2004
We study the generalized Chaplygin gas (GCG) scenario in a modified gravity approach. That is, we impose that our universe has a pure dust configuration, and allow for a modification of gravity that yields a GCG specific scale factor evolution. Moreover,
A. A. Sen, B. Ratra, L. Amendola, O. Bertolami, P. J. E. Peebles, P. P. Avelino, T. Barreiro   +6 more
core   +3 more sources

Understanding bio‐based polymers: A study of origins, properties, biodegradation and their impact on health and the environment

FEBS Open Bio, EarlyView.
This review provides an overview of bio‐based polymer sources, their unique functional properties and their environmental impact, and addresses their role as sustainable alternatives. It discusses end‐of‐life options, including composting and anaerobic digestion for renewable energy.
Sabina Kolbl Repinc, Blaž Stres, Mirica Karlovits, Igor Karlovits, Petra Jerič, Ondrej Panák, Anja Verbič, Blaž Likozar, Uroš Novak   +8 more
wiley   +1 more source

Sugar content and specific gravity as quality determinants of juice produced from banana varieties of Musa acuminate grown in Kagera Region, Tanzania

Cogent Food & Agriculture
The yield and quality of juice from various banana varieties grown in Kagera, Tanzania have been investigated in this study. The banana varieties used in this study include Mbilabile, Ekijoge, Kilomita, Mtwishi, Kalinaba, and Kainja. These are preferably
Eliud Clemence Msigala, Jonas Gervas Balengayabo, Lewis Atugonza Mtashobya, Jovine Kamuhabwa Emmanuel   +3 more
doaj   +1 more source

Promiscuous stimulation of HSP70 ATPase activity by parasite‐derived J‐domains

FEBS Open Bio, EarlyView.
The malaria parasite Plasmodium falciparum exports three highly homologous yet functionally divergent J‐domain proteins into human erythrocytes. Here, we show that J‐domains isolated from all three proteins effectively stimulate the ATPase activity of both endogenous host and exported parasite HSP70 chaperones.
Julian Barth, Moritz Koch, Le‐Han Rössner, Johanna Eichhorn, Denys Pogoryelov, Matthias P. Mayer, Jude M. Przyborski   +6 more
wiley   +1 more source

AdS/BCFT Correspondence for Higher Curvature Gravity: An Example

, 2012
We consider the effects of higher curvature terms on a holographic dual description of boundary conformal field theory. Specifically, we consider three-dimensional gravity with a specific combination of Ricci tensor square and curvature scalar square, so
A Perez, A Sinha, A Strominger, A Strominger, A Zamolodchikov, D Friedan, D Grumiller, E Bergshoeff, E Witten, EA Bergshoeff, EA Bergshoeff, EA Bergshoeff, H Lü, H Lü, I Affleck, I Gullu, J Boer de, J Oliva, JD Brown, JD Brown, JM Maldacena, Jong-Dae Park, L Susskind, L-Y Hung, M Alishahiha, M Bañados, M Chiodaroli, M Fujita, N Ogawa, O Hohm, P Calabrese, R Jackiw, R Metsaev, RC Myers, RC Myers, S Deser, S Deser, S Gubser, S Nam, S Nam, S Nojiri, S-J Hyun, Sang-Heon Yi, Soonkeon Nam, T Azeyanagi, T Takayanagi, V Balasubramanian, W Li, Y Kwon, Y Kwon, Y Liu, Yongjoon Kwon   +51 more
core   +1 more source

Some not-so-common ideas about gravity [PDF]

, 2015
Most of the approaches to the construction of a theory of quantum gravity share some principles which do not have specific experimental support up to date. Two of these principles are relevant for our discussion: (i) the gravitational field should have a
Barceló, Carlos, Carballo-Rubio, Raúl, Garay, Luis J.   +2 more
core   +2 more sources

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

Ghost Constraints on Modified Gravity

, 2004
We show that general infrared modifications of the Einstein-Hilbert action obtained by addition of curvature invariants are not viable. These modifications contain either ghosts or light gravity scalars.
Alvaro Núñez, Barrow, Carroll, Carroll, Deffayet, Dick, Dolgov, Dvali, Dvali, Dvali, Dvali, Flanagan, Kalara, Meng, Nicolis, Nojiri, Núñez, Perlmutter, Riess, Slava Solganik, Tonry, Van Nieuwenhuizen, Van Nieuwenhuizen, Vollick   +23 more
core   +3 more sources

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

An asymptotically safe guide to quantum gravity and matter [PDF]

, 2019
Asymptotic safety generalizes asymptotic freedom and could contribute to understanding physics beyond the Standard Model. It is a candidate scenario to provide an ultraviolet extension for the effective quantum field theory of gravity through an ...
Eichhorn, Astrid
core   +2 more sources