Results 51 to 60 of about 3,406,012 (295)

Calculation of losses in 2-D photonic crystal membrane waveguides using the 3-D FDTD method [PDF]

open access: yes, 2004
The three-dimensional finite-difference time-domain method is used to obtain loss per unit length in a two-dimensional photonic crystal membrane waveguide by simulating three different length guides. Results are shown for propagation both above and below
Cryan, MJ   +5 more
core   +1 more source

Ligand‐dependent transcriptional heterogeneity in cell cycle gene expression delays G1/S entry

open access: yesFEBS Letters, EarlyView.
EGF and HRG induce distinct G1/S progression programs in ErbB2‐amplified BT474 breast cancer cells. Despite activating the potent ErbB2–ErbB3 heterodimer, HRG does not accelerate cell‐cycle entry. Instead, EGF promotes earlier restriction‐point passage via ERK–FOS signaling, whereas HRG activates the AKT–MYC axis, driving transcriptional heterogeneity ...
Ririn Rahmala Febri   +5 more
wiley   +1 more source

An Accurate Maritime Radio Propagation Loss Prediction Approach Employing Neural Networks

open access: yesRemote Sensing, 2022
The radio propagation loss prediction model is essential for maritime communication. The oceanic tropospheric duct is much more complicated than the atmospheric structure on land due to the rough sea surface influence, and it leads to difficulties in ...
Shankun Shen   +5 more
doaj   +1 more source

Membrane composition and thermodynamic identity as boundaries of life for synthetic cell research

open access: yesFEBS Letters, EarlyView.
What makes a cell a cell? The boundary of a living cell is not just a wall. Read as a Markov blanket, the membrane separates internal from external states, generating identity and non‐equilibrium order. Can this identity be rebuilt from scratch in a synthetic cell?
Caterina Presutti, Bert Poolman
wiley   +1 more source

Impact of preform fabrication methods on propagation loss and output beam divergence of step-index tellurite glass optical fiber

open access: yesJPhys Photonics
This paper explores the impact of preform fabrication methods on the core volume and core/clad interface quality and their effect on the optical characteristics of multi-mode step-index tellurite glass fibers.
Ehab Salih   +4 more
doaj   +1 more source

Research on Antenna Propagation Loss Model in Rail Transit Tunnel based on Multi-dimensional Scenario Analysis

open access: yesChengshi guidao jiaotong yanjiu
[Objective] As tunnel is one of the typical environments for rail transit wireless communication, the accurate prediction of radio wave signal strength in tunnels has always attracted wide attention and study.
ZHAO Yifan   +4 more
doaj   +1 more source

INVESTIGATION ON NEED FOR SPECIFIC PROPAGATION MODEL FOR SPECIFIC ENVIRONMENT BASED ON DIFFERENT TERRAIN CHARACTERISTICS

open access: yesInternational Islamic University Malaysia Engineering Journal, 2018
: Owing to their speed of excution as well as their limited reliance on detailed knowledge of the terrain characteristics of the service environments, empirical propagation models have enjoyed general acceptability in the wireless communication research ...
Jide Julius Popoola   +3 more
doaj   +1 more source

Performance loss due to multipath propagation for IEEE 802.11 systems [PDF]

open access: yes, 2013
In this work, we developed an analytical estimation of the performance loss due to multipath propagation for a narrowband OFDM system. The propagation characteristics required for this loss estimation, are experimentally determined by virtual SIMO ...
Tanghe, Emmeric   +13 more
core  

Inhibition of cyclin‐dependent kinases 12/13 using CT7439 as a treatment for colorectal cancer with CDK12 upregulation

open access: yesMolecular Oncology, EarlyView.
The proposed mechanism of action for the CDK12/13 inhibitor and cyclin K degrader, CT7439. CDK12/13 inhibition interrupts transcription elongation, leading to increased DNA damage that results in cell death. This agent is a potentially novel treatment option for patients with colorectal cancer. Created in BioRender. Cyclin‐dependent kinase (CDK) 12 and
Wylie K. Watlington   +10 more
wiley   +1 more source

The influence of seasonal and nonreciprocal evaporation duct on electromagnetic wave propagation in the Gulf of Aden

open access: yesResults in Physics, 2020
In this paper, the adaptability of ERA5 reanalysis data in the Gulf of Aden was validated by the data of shipborne sensors. Based on the reanalysis data, the seasonal distribution of nonreciprocal evaporation duct in the Gulf of Aden was obtained with PJ
Bin Tian   +5 more
doaj   +1 more source

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