Results 171 to 180 of about 12,411 (357)

Microwave-discharge hall thruster

Microwave-discharge hall thruster
A novel type of Hall thruster featuring plasma generated by electromagnetic waves of various types is being investigated at ISAS. A Hall stage with a non-conventional downstream magnetic circuit has been designed for use with a variety of non-traditional plasma production devices, including ECR microwave cavity, and RF plasma sources.
openaire  

Impact Measuring in Sustainable Ventures: A Process Perspective

Business Strategy and the Environment, EarlyView.
ABSTRACT Impact measurement is crucial for sustainable ventures to quantify their contribution to sustainable development. Although research has highly focused on impact measurement as a static activity, we conduct a qualitative study to explore how impact measuring as a process unfolds over time.
Jan Moellmann, Esther Salvi, Frank‐Martin Belz   +2 more
wiley   +1 more source

Particle simulation of a Hall thruster plasma plume

AIP Advances
Effects of the propellant, propellant mass-flow rate, and discharge voltage on the characteristics of the plume of small Hall thrusters are studied using a particle-in-cell Monte Carlo collisions program.
Zhixin Li, Yusong Zheng, Wanting Zhang, Amin Xu, Youmei Wang   +4 more
doaj   +1 more source

Alignment and Differentiation: How Language and Network Proximity Drive Opinion‐Based Group Formation Online

European Journal of Social Psychology, EarlyView.
ABSTRACT This study examines the interplay between language and social connectedness in forming opinion‐based groups on social media. Drawing on small‐world theory and social identity theory, we propose a dual‐layer approach that combines semantic and network analysis to investigate the dynamics of group formation on X/Twitter during the 2021 COVID‐19 ...
Davide Morselli, Kevin Durrheim, Maite Beramendi, Melody Sepahpour‐Fard, Martin Mafunda, Andres Martinez Torres, Nnaemeka Ohamadike, Mike Quayle, Maria Schuld   +8 more
wiley   +1 more source

In-orbit demonstration of an iodine electric propulsion system. [PDF]

Nature, 2021
Rafalskyi D, Martínez JM, Habl L, Zorzoli Rossi E, Proynov P, Boré A, Baret T, Poyet A, Lafleur T, Dudin S, Aanesland A.   +10 more
europepmc   +1 more source

Emotions and policy change in the wake of political scandals: How did the Qatargate shake the European Parliament?

European Policy Analysis, EarlyView.
Abstract While there is an increasing interest in the role of emotions in policy studies, not much is known about how emotions unfold in one of the most emotional situations that can be encountered in politics: political scandals. To investigate how the discursive articulation of emotions shapes the policy responses to political misconduct from a ...
Rosa Sanchez Salgado, Seda Gürkan
wiley   +1 more source

Mission to Psyche: Including Undergraduates and the Public on the Journey to a Metal World. [PDF]

Space Sci Rev, 2023
Bowman CDD, Elkins-Tanton LT, Talamante A, Bell JF, Cisneros E, Cook A, Frieman JD, Gainor D, Hunziker J, Khan S, Lawler CR, Maschino J, McCoy TJ, Nessi K, Oran R, Seal D, Simon A, Singh R, Tolbert CM, Valentine K, Weiss B, Wenkert DD, Williams DA.   +22 more
europepmc   +1 more source

Policy Spandrels: How Design Decisions Can Open Up Spaces for Unintended Policy Change

European Policy Analysis, EarlyView.
ABSTRACT This article introduces the concept of policy spandrels to make sense of public policies producing second‐order effects that are unintentional from the perspective of policy design and yet are fraught with consequences. By analogy with architectural spandrels—leftover spaces that can be used for unforeseen purposes—policy change can be enabled
Martino Maggetti
wiley   +1 more source

A preliminary characterization of applied-field MPD thruster plumes [PDF]

Electric probes, quantitative imaging, and emission spectroscopy were used to study the plume characteristics of applied field magnetohydrodynamic thrusters.
Biaglow, James, Myers, Roger M., Reese, Shawn, Vernyi, Mark, Wehrle, David   +4 more
core   +1 more source

Policy Networks and Policy Entrepreneurship in the EU: Explaining Structural Policy Change in Pharmaceutical Innovation Incentives and Health Technology Assessment

European Policy Analysis, EarlyView.
ABSTRACT Policy process research has excelled in explaining structural policy change within national settings, but extensions and applications to the EU level have long proven challenging for scholars. Given that the EU is currently experiencing its longest period of Treaty stability since the 1980s—having evolved into a sui generis political system ...
Vassilis Karokis‐Mavrikos
wiley   +1 more source