Results 41 to 50 of about 5,836,957 (242)
Greenland subglacial drainage evolution regulated by weakly connected regions of the bed
Nature Communications, 2016 Surface meltwater draining to the bed of the Greenland Ice Sheet each summer causes ice flow changes inconsistent with the prevailing theory of channelizing subglacial drainage.
Matthew J. Hoffman +9 more
doaj +1 more source
Ligand‐dependent transcriptional heterogeneity in cell cycle gene expression delays G1/S entry
FEBS 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
Understanding the CO2 Scrubber Used at the Space Analog for the Moon and Mars
, 2023 Immediate accessThis item is made available by the University of Arizona Center for Human Space Exploration (CHaSE) with support from the University of Arizona Libraries.
Tresch, Trent
core +4 more sources
Survey of burning rate measurements in small solid rocket motors
FirePhysChemBurning rate plays a crucial role in determining the performance of solid rocket motors (SRMs). In the traditional approach for solid propellant propulsion, technical activities regarding burning rates are developed at three different operational levels:
Luigi T. DeLuca, Adriano Annovazzi
doaj +1 more source
Solid Fuel Orbiter Designe in Optimized Space Transfer [PDF]
فصلنامه علوم و فناوری فضایی, 2015 The design method presented in this paper is for utilizing, fast and easy system designing of orbital transfer block for transferring satellite from park orbit to destination orbit.
Mehran Nosrat Elahi +2 more
doaj
FEBS Letters, EarlyView.How do genomes gain new functional parts? In eukaryotes, which tend to evolve under weak selection, much of the genome is junk. Palazzo and Qiu borrow the logic of Markov chains to show how non‐functional DNA becomes functional through the appearance of intermediate states, which arise due to epistasis, buffering, and biochemical messiness, allowing ...
Alexander F. Palazzo, Yi Qiu
wiley +1 more source
, 2019 Mr. Solid is the retired Senior Executive of Rockwell’s Space Operations in Florida after serving over 39 years in the company’s aerospace businesses. In 1996, these businesses became part of the Boeing Company.
Solid, L.D. Lee
core +1 more source
GENERAL CONCEPTS ABOUT SOLID BODY ASTRODYNAMICS
Nonconventional Technologies Review, 2020 The paper presents the theoretical foundation of the dynamics of the solid body in gravitational movement in the outer space. It is known that the movement of solid bodies in space is subjects both the laws of Newton's classical mechanics and those of ...
Viorel Mihai Nani, Alin Nani
doaj
Statistical Convergence of Double Sequences in Locally Solid Riesz Spaces
Abstract and Applied Analysis, 2012 Recently, the notion of statistical convergence is studied in a locally solid Riesz space by Albayrak and Pehlivan (2012). In this paper, we define and study statistical τ-convergence, statistical τ-Cauchy and S∗(τ)-convergence of double sequences in a ...
S. A. Mohiuddine +2 more
doaj +1 more source
Artificial molecular machines and motors—Design and control of nanoscale motion
FEBS Letters, EarlyView.Molecules are constantly moving because of thermal fluctuations, but random motion alone cannot be exploited to perform directional tasks. Artificial molecular machines use chemical, electrical, or light energy to bias this motion. Molecular shuttles, rotary motors, and supramolecular pumps illustrate how nanoscale movement can be controlled and ...
Leonardo Andreoni, Alberto Credi
wiley +1 more source