Results 131 to 140 of about 918,108 (389)

Probing the dark matter density evolution law with large scale structures

European Physical Journal C: Particles and Fields, 2021
We propose a new method to explore a possible departure from the standard time evolution law for the dark matter density. We looked for a violation of this law by using a deformed evolution law, given by $$\rho _c(z) \propto (1+z)^{3+\epsilon }$$ ρ c ( z
Kamal Bora, R. F. L. Holanda, Shantanu Desai   +2 more
doaj   +1 more source

The role of luminous substructure in the gravitational lens system MG 2016+112 [PDF]

, 2008
MG 2016+112 is a quadruply imaged lens system with two complete images A and B and a pair of merging partial images in region C as seen in the radio. The merging images are found to violate the expected mirror symmetry.
A. More, J. McKean, S. More, R. Porcas, L. Koopmans, M. Garrett, M. Garrett, M. Garrett   +7 more
semanticscholar   +1 more source

Advanced Microfluidic‐Based Wearable Electrochemical Sensors for Continuous Biochemical Monitoring

Advanced Electronic Materials, EarlyView.
Microfluidic‐based wearable electrochemical sensors are transforming non‐invasive health monitoring through real‐time biochemical analysis of sweat, saliva, and interstitial fluid. This review explores advances in microfluidic design, fabrication, and sensor integration while addressing biofluid variability, material compatibility, and scalability.
Sehyun Park, Seongyeop Kim, Soojin Lee, Vladimir V. Tsukruk, SeungHyun Park, Hyo‐Ryoung Lim   +5 more
wiley   +1 more source

Detecting Dark Objects with Plasma Microlensing by Their Gravitational Wakes

The Astrophysical Journal
A moving mass makes a gravitational wake in the partially ionized interstellar medium, which acts as a lens for radio-frequency light. Consequently, plasma microlensing could complement gravitational microlensing in the search for invisible massive ...
M. Sten Delos
doaj   +1 more source

Compliant Robotics in Space: A Prospective Review of Soft and Deformable Systems for Space Missions

Advanced Intelligent Systems, EarlyView.
Compliant robots are increasingly becoming integral to space exploration due to their adaptability, flexibility, and lightweight design. This article reviews categories such as soft, reconfigurable, and hyper‐redundant robots and their evolving role in enhancing space missions.
Hamed Rahimi Nohooji, Holger Voos
wiley   +1 more source

Defocusing gravitational microlensing [PDF]

, 1996
We introduce the notion of defocusing gravitational lens considering a MACHO located behind a light source with respect to an observer. The consequence of defocusing effect is a temporal variability of star luminosity which produces a gap instead of a ...
A A Marino, Alard C, Binney J, Blioh P V, Byrd P F, Carr B J, G Marmo, Harwit M, Hawking S W, Kaiser R, Paczynski B, Padmanabhan T, Papapetrou A, Peebles P J E, R de Ritis, Refsdal S, S Capozziello, Schneider P, Schneider P, Schneider P, Udalski A, V I Man'ko, Wald R M   +22 more
core   +3 more sources

Recent Advances in Nitride‐Based Micro‐LEDs for Next‐Generation Display

Advanced Physics Research, EarlyView.
Nitride‐based Micro‐light‐emitting diode (Micro‐LED) is now spreading into the field of display technology, which has been dominated by liquid crystal display (LCD) and organic LED (OLED). This review focuses on recent developments in Micro‐LED display, including epitaxy and chip processing, mass transfer, driving, bonding, and detection technologies ...
Jiahao Song, Jingjing Jiang, Minhua Li, Qianxi Zhou, Linyue Meng, Ke Sun, Siyuan Cui, Kuosheng Wen, Sheng Liu, Shengjun Zhou   +9 more
wiley   +1 more source

Discovering disagreement: The story of an undergraduate Wartime Quartet reading group

Journal of Philosophy of Education, Volume 56, Issue 6, Page 851-862, December 2022., 2022
Abstract This paper describes and analyses the experience of the participants of an undergraduate reading group on ‘The Wartime Quartet’. In the first section, I explain the set‐up of the reading group. In the second section, I discuss what the participants shared and the trends we noticed in our experiences as women and marginalised genders studying ...
Anne‐Marie McCallion
wiley   +1 more source

B0850+054: a new gravitational lens system from CLASS [PDF]

, 2002
We report the discovery of a new gravitational lens system from the CLASS survey. Radio observations with the VLA, the WSRT and MERLIN show that the radio source B0850+054 is comprised of two compact components with identical spectra, a separation of 0.7
A. C. S. Readhead, A. D. Biggs, A. G. De Bruyn, C. D. Fassnacht, Chae, D. Rusin, I. W. A. Browne, J. P. McKean, K.- H. Chae, L. V. E. Koopmans, M. A. Norbury, N. J. Jackson, P. M. Phillips, P. N. Wilkinson, R. D. Blandford, S. T. Myers, T. J. Pearson   +16 more
core   +3 more sources

Exploring Dark Photon Production and Kinetic Mixing Constraints in Heavy‐Ion Collisions

Astronomische Nachrichten, EarlyView.
ABSTRACT Vector U‐bosons, often referred to as “dark photons,” are potential candidates for mediating dark matter interactions. In this study, we outline a procedure to derive theoretical constraints on the upper bound of the kinetic mixing parameter ϵ2MU$$ {\upvarepsilon}^2\left({M}_U\right) $$ using dilepton data from heavy‐ion from SIS to RHIC ...
Adrian William Romero Jorge, Elena Bratkovskaya, Taesoo Song, Laura Sagunski   +3 more
wiley   +1 more source