Results 41 to 50 of about 447,549 (300)

Outgassing of icy bodies in the solar system - I. The sublimation of hexagonal water ice through dust layers

, 2011
Our knowledge about the physical processes determining the activity of comets were mainly influenced by several extremely successful space missions, the predictions of theoretical models and the results of laboratory experiments.
B. Gundlach, Bar-Nun, Beckmann, Boudreau, Buck, Davy, Fanale, Groussin, Isono, J. Blum, Kaufmann, Knake, Knudsen, Knudsen, Kossacki, Kramers, Lämmerzahl, Mauersberger, Nelson, Pat-El, Pruppacher, Schleicher, Sears, Shul’Man, Skorov, Skorov, Slack, Sunshine, Yu.V. Skorov   +28 more
core   +1 more source

Secular Instability and Planetesimal Formation in the Dust Layer [PDF]

, 1999
Late in the gaseous phase of a protostellar disk, centimeter-sized bodies probably settle into a thin ``dust layer'' at the midplane. A velocity difference between the dust layer and the gas gives rise to turbulence, which prevents further settling and ...
Goodman, J., Pindor, B.
core   +3 more sources

Numerical Analysis of Sensitivity of SAW Structure to the Effect of Toxic Gases

Archives of Acoustics, 2016
The paper presents the results of numerical analysis of the SAW gas sensor in the steady and non-steady states. The effect of SAW velocity changes vs surface electrical conductivity of the sensing layer is predicted.
Tomasz HEJCZYK, Tadeusz PUSTELNY, Bartlomiej WSZOŁEK, Wieslaw JAKUBIK, Erwin MACIAK   +4 more
doaj   +1 more source

Microstructure and Wear Properties of a Low Carbon Bainitic Steel on Plasma Nitriding at Different N2-H2 Gas Mixtures

Materials Research, 2021
For the first time, the influence of gas mixture on first damage resistance of a plasma nitrided DIN 18MnCrSiMo6-4 bainitic steel was investigated. Samples were nitrided at 500 °C with three different N2-H2 gas mixtures, containing 5, 24, and 76 vol.% N2.
Rafael Luciano Dalcin, Alexandre da Silva Rocha, Victor Velho de Castro, Julio Cesar Klein das Neves, Carlos Henrique da Silva, Ricardo Diego Torres, Rafael Menezes Nunes, Célia de Fraga Malfatti   +7 more
doaj   +1 more source

Analyzing and Modeling of Water Transport Phenomena in Open-Cathode Polymer Electrolyte Membrane Fuel Cell

Applied Sciences, 2021
Water management is one issue that must be surpassed to ensure high membrane proton conductivity and adequate reactant transport in the membrane-electrode assembly (MEA) simultaneously.
Wei-Wei Yuan, Kai Ou, Seunghun Jung, Young-Bae Kim   +3 more
doaj   +1 more source

Finite Element Simulation and ANFIS Prediction of Dimensional Error Effect on distribution of BPP/GDL Contact Pressure in PEM Fuel Cell [PDF]

Hydrogen, Fuel Cell & Energy Storage, 2017
Distribution of contact pressure between the bipolar plate and gas diffusion layer considerably affect the performance of proton exchange membrane fuel cell.
Pouya Pashaie, Mohsen Shakeri, Salman Nourouzi   +2 more
doaj   +1 more source

Effects of Lateral Diffusion on the Dynamics of Desorption

, 2012
The adsorbate dynamics during simultaneous action of desorption and lateral adsorbate diffusion is studied in a simple lattice-gas model by kinetic Monte Carlo simulations.
AB Bortz, G Brown, GH Gilmer, GH Gilmer, Ibrahim Abou Hamad, J Hoshen, L Onsager, M Lifshitz, MA Novotny, NC Bartelt, P Debye, Per Arne Rikvold, S Frank, Tjipto Juwono, Y He   +14 more
core   +1 more source

Hippo pathway at the crossroads of stemness and therapeutic resistance in breast cancer

Molecular Oncology, EarlyView.
Dysregulation of the Hippo pathway drives nuclear accumulation of YAP/TAZ, activating stemness‐related transcriptional programs that sustain breast cancer stemness and fuel therapeutic resistance across subtypes, underscoring Hippo signaling as a targetable vulnerability. Figure created and edited with BioRender.com.
Giulia Schiavoni, Antonella Palmese, Stefano Scalera, Laura Cipriani, Davide Mascolo, Patrizia Vici, Teresa Arcuri, Lorena Filomeno, Eriseld Krasniqi, Giovanni Blandino, Giulia Bon, Marcello Maugeri‐Saccà   +11 more
wiley   +1 more source

Numerical Simulation of the Cold-Start Process of Polymer Electrolyte Fuel Cell

Energies, 2023
In this study, the cold-start process of a polymer electrolyte fuel cell has been numerically investigated under various ambient temperatures and operating currents, ranging from subzero to 283 K.
Yazhou Chen, Sheng Li, Jie Peng, Weilin Zhuge, Yangjun Zhang   +4 more
doaj   +1 more source

Secular Gravitational Instability of a Dust Layer in Shear Turbulence

, 2011
We perform a linear stability analysis of a dust layer in a turbulent gas disk. Youdin (2011) investigated the secular gravitational instability of a dust layer using hydrodynamic equations with a turbulent diffusion term.
Bai, Bai, Barranco, Binney, Chandrasekhar, Chiang, Coradini, Cuzzi, Dominik, Eiichiro Kokubo, Hayashi, Ishitsu, Johansen, Johansen, Lee, Lee, Michikoshi, Michikoshi, Michikoshi, Michikoshi, Safronov, Sano, Sekiya, Sekiya, Shakura, Shu, Shu-ichiro Inutsuka, Shugo Michikoshi, Stokes, Wakita, Ward, Ward, Weidenschilling, Yamoto, Youdin, Youdin, Youdin, Youdin   +37 more
core   +1 more source