Results 111 to 120 of about 12,411 (357)

Wind‐driven seed dispersal differentially promotes seed trapping and retention across alpine plants

American Journal of Botany, EarlyView.
Abstract Premise Seed dispersal can mediate species interactions between plants across life stages. Plants can physically stop seed movement (seed trapping) and prevent further dispersal following entrapment (seed retention). We therefore hypothesized seed trapping and retention rates depend on the physical attributes of interacting seeds and plants ...
Courtenay A. Ray, Savannah R. Troy, Emily V. Xie, Thomas M. Jenkins, Gavin Belfry, Aidan Wells, Perry de Valpine, Benjamin W. Blonder   +7 more
wiley   +1 more source

Discussion on Rayleigh equation obtained for a Hall thruster plasma with dust

Journal of Theoretical and Applied Physics, 2018
The present study focuses on the Rayleigh equation derived in the case of a Hall thruster plasma having dust contamination, produced near the exit of the channel due to the finite divergence of the accelerated ions and the sputtering of the walls. In the
Jasvendra Tyagi, Dimple Sharma, Hitendra K. Malik   +2 more
doaj   +1 more source

Measuring Child Disadvantage: Comparing Multidimensional and Socioeconomic Approaches for Predicting Developmental Outcomes

Australian Journal of Social Issues, EarlyView.
ABSTRACT Robust measurement of disadvantage is essential to identifying and addressing inequities in children's development. We tested how a multidimensional framework of child disadvantage performed relative to a traditional socioeconomic position (SEP) approach to predict developmental outcomes.
Wei Hong, Fiona Mensah, Elodie O'Connor, Shuaijun Guo, Sharon Goldfeld, Meredith O'Connor, Cindy Pham, Sarah Gray   +7 more
wiley   +1 more source

Design and Testing of a Hall Effect Thruster with 3D Printed Channel and Propellant Distributor [PDF]

The UAH-78AM is a low-power Hall effect thruster developed at the University of Alabama in Huntsville with channel walls and a propellant distributor manufactured using 3D printing.
Hopping, Ethan P., Xu, Kunning G.
core   +1 more source

Ion Current Density Study of the NASA-300M and NASA-457Mv2 Hall Thrusters [PDF]

, 2012
NASA Glenn Research Center is developing a Hall thruster in the 15-50 kW range to support future NASA missions. As a part of the process, the performance and plume characteristics of the NASA-300M, a 20-kW Hall thruster, and the NASA-457Mv2, a 50-kW Hall
Herman, Daniel A., Huang, Wensheng, Kamhawi, Hani, Shastry, Rohit, Soulas, George C.   +4 more
core   +2 more sources

The Cost of the National Disability Insurance Scheme: Australia's Print‐Media Discourse

Australian Journal of Social Issues, EarlyView.
ABSTRACT This paper examines the way that Australian newspapers have framed the cost of the National Disability Insurance Scheme (NDIS). Introduced in 2013, the NDIS represented a major change in Australia's disability support policy, moving for the first time to a nationwide universal insurance model.
Meera Chinnappa, Jennifer Smith‐Merry, Kuo‐yi Jade Chang   +2 more
wiley   +1 more source

Numerical Study of Hall Thruster Plume and Sputtering Erosion

Journal of Applied Mathematics, 2012
Potential sputtering erosion caused by the interactions between spacecraft and plasma plume of Hall thrusters is a concern for electric propulsion. In this study, calculation model of Hall thruster’s plume and sputtering erosion is presented.
Li Yan, Ping-Yang Wang, Yang-Hua Ou, Xiao-Lu Kang   +3 more
doaj   +1 more source

Buoyancy‐Driven Micropolar Fluid Flow Transport in Porous Media With Variable Heat Source and Convective Heating

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT The objective of the current research is to characterize the thermal performance in micropolar fluid flows on a vertically elongated porous sheet in the presence of buoyancy forces. Thus, the motivation of this study is to improve the understanding of buoyancy‐driven micropolar fluid flows through porous media, which are relevant to advanced ...
T. Venu, MD. Shamshuddin, S. O. Salawu
wiley   +1 more source

Co-Flow Hollow Cathode Technology [PDF]

Hall thrusters utilize identical hollow cathode technology as ion thrusters, yet must operate at much higher mass flow rates in order to efficiently couple to the bulk plasma discharge.
Goebel, Dan M., Hofer, Richard R.
core   +1 more source

Impact of Darcy–Forchheimer Inertial Drag and Heat Dissipation on Micropolar Hybrid Nanofluid Flow via Expanding Surface

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT The hybrid nanofluid integrated with micropolar fluid shows growing interest due to the enhanced thermal performance in microscale devices. These improved properties are due to their greater thermal conductivity and rotational effects. The proposed study assesses the significance of velocity slip on the flow characteristic of micropolar ...
P. P. Nayak, S. R. Mishra, Priya Mathur, Subhajit Panda   +3 more
wiley   +1 more source