Results 61 to 70 of about 71,531 (348)

Galaxy mergers and gravitational lens statistics [PDF]

The Astrophysical Journal, 1994
We investigate the impact of hierarchical galaxy merging on the statistics of gravitational lensing of distant sources. Since no definite theoretical predictions for the merging history of luminous galaxies exist, we adopt a parametrized prescription, which allows us to adjust the expected number of pieces comprising a typical present galaxy at z=0.65.
Rix, Hans-Walter, Maoz, Dan, Turner, Edwin L., Fukugita, Masataka   +3 more
openaire   +2 more sources

Robust Smart Superhydrophobic Cilia

Advanced Science, EarlyView.
To date, ciliated surfaces cannot withstand mechanical damage because cilia/wires are inherently fragile. By aligning magneto‐responsive, flexible, superhydrophobic microwires on the sidewall of vertical frames, the frames act as armors to protect microwires from mechanical damage; when needed, the microwires re‐align uprightly under a magnet field to ...
Chuanqi Wei, Baixue Li, Yimeng Zhang, Oleg V. Gendelman, Youhua Jiang   +4 more
wiley   +1 more source

Mimicking Symmetry‐Breaking Einstein Ring by Optical Lens

Advanced Photonics Research
The celebrated theory of general relativity has inspired research on optical simulations using artificial microstructures to mimic curved space–times.
Jun‐Liang Duan, Wen Xiao, Minyong Guo, Tong Liu, Huanyang Chen, Jin‐Hui Chen   +5 more
doaj   +1 more source

First Observation of Parallax in a Gravitational Microlensing Event [PDF]

, 1995
We present the first detection of parallax effects in a gravitational microlensing event. Parallax in a gravitational microlensing event observed only from the Earth appears as a distortion of the lightcurve due to the motion of the Earth around the Sun.
A. W. Rodgers,, B. A. Peterson,, Benetti S., C. Alcock,, C. W. Stubbs,, D. Alves,, D. P. Bennett,, J. Guern,, K. C. Freeman,, K. Griest,, K. H. Cook,, M. J. Lehner,, M. R. Pratt,, P. J. Quinn,, R. A. Allsman,, Refsdal S., S. L. Marshall,, T. S. Axelrod,, Udalski A., Udalski A., W. Sutherland   +20 more
core   +2 more sources

Multimodal Locomotion of Soft Robots

Advanced Intelligent Systems, EarlyView.
This review comprehensively surveys recent advances in multimodal locomotion within soft robotics. Typical locomotion modes are summarized and categorized. Furthermore, the underlying mechanisms enabling multimodal locomotion are discussed and classified into three primary categories: active control‐based, reconfiguration‐based, and environment ...
Zihao Yuan, Huangwei Ji, Kai Huang, Feifei Chen, Guoying Gu   +4 more
wiley   +1 more source

The Gravitational Lens Candidate FBQ 1633+3134 [PDF]

, 2000
We present our ground-based optical imaging, spectral analysis, and high resolution radio mapping of the gravitational lens candidate FBQ 1633+3134. This z=1.52, B=17.7 quasar appears double on CCD images with an image separation of 0.66 arcseconds and a
Boisse P., Michael D. Gregg, Nicholas D. Morgan, Paul L. Schechter, Refsdal S., Richard L. White, Robert H. Becker, Wisotzki L.   +7 more
core   +3 more sources

Phytoplankton Tune Local pH to Actively Modulate Circadian Gravitactic Behavior

Advanced Physics Research, EarlyView.
Diel vertical migration hides an unexpected twist: Phytoplankton quietly engineer their local pH landscape, splitting into behaviorally distinct sub‐groups which stay separated even in identical conditions. Circadian pH changes, occuring over the course of a day, reshape their gravitactic behavior and physiological functions in ways scientists have ...
Arkajyoti Ghoshal, Soumitree Mishra, Jayabrata Dhar, Hans‐Peter Grossart, Anupam Sengupta   +4 more
wiley   +1 more source

CTQ 414: A New Gravitational Lens

, 1999
We report the discovery and ground based observations of the new gravitational lens CTQ 414. The source quasar lies at a redshift of z = 1.29 with a B magnitude of 17.6.
Alan Dressler, Claeskens J.-F., Joshua N. Winn, José Maza, Maza J., Nicholas D. Morgan, Paul L. Schechter, Refsdal S., Rosvick J. M.   +8 more
core   +2 more sources

GRAVITATIONAL LENS CANDIDATES IN THE E-CDFS [PDF]

The Astrophysical Journal, 2011
We report ten lens candidates in the E-CDFS from the GEMS survey. Nine of the systems are new detections and only one of the candidates is a known lens system. For the most promising five systems including the known lens system, we present results from preliminary lens mass modelling, which tests if the candidates are plausible lens systems ...
Haeussler, B., More, A., Jahnke, K., More, S., Gallazzi, A., Bell, E. F., Barden, M.   +6 more
openaire   +5 more sources

A gamified formative question bank to enhance student learning and engagement in a foundational medical science course

Anatomical Sciences Education, EarlyView.
Abstract While gamified learning platforms show promise for engaging digital learners and promoting active learning, evidence of their effectiveness in predicting academic outcomes remains limited. This study examined how engagement patterns and incentives impact academic outcomes in a gamified environment to determine whether a formative question bank
Mohammad Aldalou, Angel Laboy, Laura E. Fraser, Jeremey Walker, William S. Brooks, Brook Hubner   +5 more
wiley   +1 more source