Results 21 to 30 of about 672,646 (267)
Derivation of myoepithelial progenitor cells from bipotent mammary stem/progenitor cells.
PLoS ONE, 2012 There is increasing evidence that breast and other cancers originate from and are maintained by a small fraction of stem/progenitor cells with self-renewal properties.
Xiangshan Zhao +3 more
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Investigating Remote Work Trends in Post-COVID-19: A Twitter-Based Analysis
IEEE AccessThis study explores the evolving trends and public perceptions of remote work that have emerged in the aftermath of the COVID-19 pandemic, with a particular focus on identifying key themes and sentiments expressed on Twitter in 2022.
Adem Korkmaz +3 more
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The “H and K” Bands of Carbon [PDF]
Nature, 1926 IN discussing the negative bands of carbon, Deslandres mentions (Comptes rendus, 137, p. 460, 1903) the two strong bands λ2883.86 and 2897.11 which “are very intense, are diffuse on both sides, are of a different structure and otherwise very curious”, and suggests that they may probably be due to oxygen.
openaire +1 more source
Electronics Letters, 1977 Single-stage f.e.t. amplifiers operating in K-band have been constructed using the Varian VSX 9305 0.5 µm-gate GaAs f.e.t. An amplifier gain of 9±1 dB was obtained over the frequency band 18.5-20.5 GHz and gain of 8±1 dB was observed from 23.0 to 26.0 GHz. An amplifier noise figure of 5.6 dB was measured at 24 GHz.
M.M. Nowak, P.A. Terzian, R.D. Fairman
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The band-edge excitons observed in few-layer NiPS3
npj 2D Materials and Applications, 2021 Band-edge excitons of few-layer nickel phosphorous trisulfide (NiPS3) are characterized via micro-thermal-modulated reflectance (μTR) measurements from 10 to 300 K. Prominent μTR features of the A exciton series and B are simultaneously detected near the
Ching-Hwa Ho +2 more
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A New Algorithm for the Inverse of Periodic k Banded and Periodic Anti k banded Matrices
, 2011 13 ...
Yaşar, Meral, Bozkurt, Durmuş
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Design of a curved， band-pass frequency selective surface radome with steep cut-off performance
Dianzi Jishu YingyongThe traditional frequency selective surface（FSS）radome has the problem such as high structural profile and insufficient out of band cut-off performance. A design method for low-profile and band-pass FSS radome with steep out of band cut-off in K-band is ...
Wang Yifu +4 more
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Two-layered Dual-band Perfect Metamaterial Absorber at K band Frequency
Advanced Electromagnetics, 2018 This paper presents a study of a novel absorber structure based on two-dielectric-layers, two perfect absorption frequency bands at K band (f1 = 26.5 GHz and f2 = 28.6 GHz) go under observance.
M. C. Tran, T. T. H. Phuong
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Pediatric Blood &Cancer, EarlyView.ABSTRACT Introduction Anthracycline‐related cardiac remodeling precedes heart failure in childhood cancer survivors. The objectives of this study were to determine the relationships between patient‐specific factors, moderate‐to‐vigorous physical activity (MVPA), and cardiac remodeling.
Hari K. Narayan +15 more
wiley +1 more source
Design of a K-band frequency conversion module
Dianzi Jishu YingyongIn this article, a K-band frequency conversion module is designed, which includes up and down conversion channels to achieve frequency conversion between K-band RF signals and intermediate frequency signals.
Gu Jiangchuan, Liu Yuankun, Hu Yue
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