Results 91 to 100 of about 1,081 (308)
Characterization of a 100-kW Class Nested-Channel Hall Thruster
, 2018 The next generation of electric propulsion consists of systems in excess of 300 kW of power. These systems enable a wide variety of missions, including crewed missions to near-Earth asteroids and Mars.
Hall, Scott James
core
Hall-Effect Thruster Channel Surface Properties Investigation
, 2012 Surface properties of Hall-effect thruster channel walls play an important role in the performance and lifetime of the device. Physical models of near-wall effects are beginning to be incorporated into thruster simulations, and these models must account ...
Rovey, Joshua L., Zidar, D. G.
core +1 more source
Berichte zur Wissenschaftsgeschichte, EarlyView.Since late 2021, serious allegations have been made against physicist Erwin Schrödinger, ranging from pedophilia to serial sexual abuse. These accusations have significantly tarnished the Nobel Prize winner's public reputation. The ongoing debate has repeatedly raised the question of whether, and to what extent, these grave allegations are justified ...
Magdalena Gronau, Martin Gronau
wiley +1 more source
Operation of the T-100 Hall Effect Thruster
, 2017 The introduction of Hall Effect Thrusters from the former Soviet Union to the United States generated considerable interest in using the propulsion system aboard Western spacecraft.
Smith, Glynn +2 more
core
Application of iodine plasma for electric propulsion
Авіаційно-космічна техніка та технологіяMost state-of-the-art electric space propulsion systems, such as gridded and Hall effect thrusters, use xenon as the propellant gas. However, xenon is very rare and expensive to produce, and it is used in a number of competing industrial applications ...
Sai Vigness Ramasamy, Leonid Bazyma
doaj +1 more source
How wildlife respond to tropical cyclones: short‐term tactics and long‐term impacts
Biological Reviews, EarlyView.ABSTRACT From butterflies to lizards and from sharks to seabirds, wildlife exhibit tactics to survive the impacts of tropical cyclones, also known as hurricanes, cyclones, or typhoons depending on where they occur. Some species seek refuge during the storm by moving, some remain in place and ride it out, and others move longer distances, avoiding the ...
Erin L. Koen +15 more
wiley +1 more source
Characterization of a 100-kW Class Nested-Channel Hall Thruster [PDF]
The next generation of electric propulsion consists of systems in excess of 300 kW of power. These systems enable a wide variety of missions, including crewed missions to near-Earth asteroids and Mars.
Hall, Scott
core
Humans are not unique: difficult birth is common in placental mammals
Biological Reviews, EarlyView.ABSTRACT Human childbirth is widely presumed to be uniquely difficult and dangerous compared to birth in other mammals. Tight fetopelvic proportions can result in obstructed labour and contribute to high rates of maternal and neonatal mortality. Ideas summarised under the ‘obstetrical dilemma’ have contributed to this assumption by explaining difficult
Nicole D. S. Grunstra
wiley +1 more source
AerospaceHall thrusters are plasma-based devices that have established themselves as one of the most attractive and mature electric propulsion technologies for space applications.
Luca Leporini +3 more
doaj +1 more source
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 +2 more
wiley +1 more source