Results 81 to 90 of about 2,377,761 (195)

Optical Variability of Blazars in the Tomo-e Gozen Northern Sky Transient Survey

The Astrophysical Journal
We studied the optical variability of 241 BL Lacertae (BL Lacs) and 83 flat-spectrum radio quasars (FSRQs) from the 4LAC catalog using data from the Tomo-e Gozen Northern Sky Transient Survey, with ∼50 epochs per blazar on average.
TianFang Zhang, Mamoru Doi, Mitsuru Kokubo, Shigeyuki Sako, Ryou Ohsawa, Nozomu Tominaga, Masaomi Tanaka, Yasushi Fukazawa, Hidenori Takahashi, Noriaki Arima, Naoto Kobayashi, Ko Arimatsu, Shin-ichiro Okumura, Sohei Kondo, Toshihiro Kasuga, Yuki Mori, Yuu Niino   +16 more
doaj   +1 more source

From Novice to Expert: How Expertise Shapes Motor Variability in Sports Biomechanics—a Scoping Review

Scandinavian Journal of Medicine &Science in Sports, Volume 34, Issue 8, August 2024.
ABSTRACT With expertise, athletes develop motor strategies that enhance sports performance or reduce functional costs. Motor variability is known as a relevant way to characterize these strategies in athletes with different levels of expertise. The aim of this scoping review is to gather and discuss the latest advances in the impact of expertise on ...
Emile Marineau, Julien Ducas, Janny Mathieu, Alvaro De Pano Rodriguez, Martin Descarreaux, Jacques Abboud   +5 more
wiley   +1 more source

Thickness of Nanoscale Poly(Dimethylsiloxane) Layers Determines the Motion of Sliding Water Drops

Advanced Materials, Volume 36, Issue 29, July 18, 2024.
Polydimethylsiloxane brushes are extensively utilized in material applications as a hydrophobic coating due to the low liquid drop friction and high stability. However, the drop movements still vary depending on how it is prepared. In this work, the film thickness is proved to be a determinant for the water drop dynamic friction on such kind of a ...
Xiaoteng Zhou, Yongkang Wang, Xiaomei Li, Pranav Sudersan, Katrin Amann‐Winkel, Kaloian Koynov, Yuki Nagata, Rüdiger Berger, Hans‐Jürgen Butt   +8 more
wiley   +1 more source

Jets, black holes and disks in blazars

EPJ Web of Conferences, 2013
The Fermi and Swift satellites, together with ground based Cherenkov telescopes, has greatly improved our knowledge of blazars, namely Flat Spectrum Radio Quasars and BL Lac objects, since all but the most powerful emit most of their electro–magnetic ...
Ghisellini Gabriele
doaj   +1 more source

Spectral Variability in Radio-Loud Quasars

, 2014
The spectral variability of a sample of 44 Flat-Spectrum Radio Quasars (FSRQs) and 18 Steep-Spectrum Radio Quasars (SSRQs) in SDSS stripe 82 region is investigated. Twenty-five of 44 FSRQs show a bluer-when-brighter trend (BWB), while only one FSRQ shows
Gu, Minfeng
core  

Jet Power Estimates of Flat-spectrum Radio Quasars PKS 1441+25 and Ton 599 from Broadband Spectral Energy Distribution Modeling

The Astrophysical Journal
Flat-spectrum radio quasars (FSRQs) are among the most energetic and powerful active galactic nuclei, often exhibiting jet powers comparable to or exceeding the Eddington luminosity.
Hritwik Bora, Ranjeev Misra, Rukaiya Khatoon, Rupjyoti Gogoi   +3 more
doaj   +1 more source

Relations between integrated and monochromatic luminosities of flat-spectrum radio quasars

, 2011
We employ a sample of 362 flat-spectrum radio quasars (FSRQs) to calculate their integrated luminosities by integrating the spectral energy distribution (SED) constructed with multi-band (radio, IR, optical, UV and X-ray) data.
Chen, Zhao-Yu, Chen, Zhi-Fu, Qin, Yi-Ping, Gu, Min-Feng, Su, Cheng-Yue, Lue, Lian-Zhong, Li, You-Bing, Chen, Ye   +7 more
core  

SMMAN: Quasi-simultaneous Multiwavelength Monitoring of Gamma-Ray-loud Active Galactic Nuclei with the Nanshan 26 m Radio Telescope

The Astrophysical Journal Supplement Series
Active galactic nuclei (AGNs) are characterized by strong temporal flux density variability across the electromagnetic spectrum, offering insights into the complex physical processes governing accretion and plasma outflows.
Lang Cui, Krishna Mohana A, Xin Wang, Ning Chang, Guiping Tan, Xiang Liu   +5 more
doaj   +1 more source

Spectrum sharing models in cognitive radio networks [PDF]

, 2011
Spectrum scarcity demands thinking new ways to manage the distribution of radio frequency bands so that its use is more effective. The emerging technology that can enable this paradigm shift is the cognitive radio.
Rifà Pous, Helena, Rifà Coma, Josep
core  

A Dichotomy in the 1–24 GHz Parsec-scale Radio Spectra of Radio-quiet Quasars

The Astrophysical Journal
We present the parsec-scale radio spectra of a representative sample of 13 Palomar–Green radio-quiet quasars, based on our new Very Long Baseline Array (VLBA) observations at 8.4 and 23.6 GHz and our earlier VLBA studies at 1.5 and 5.0 GHz.
Sina Chen, Ari Laor, Ehud Behar, Ranieri D. Baldi, Joseph D. Gelfand, Amy E. Kimball   +5 more
doaj   +1 more source