Results 81 to 90 of about 962 (231)
In situ mapping of iron oxidation in laminar metal fuel flames using X‐ray absorption spectroscopy
Journal of Synchrotron Radiation, EarlyView.For the first time an iron metal flame has been mapped by in situ X‐ray absorption spectroscopy. Strong gradients in oxidation state and phase composition across the metallic core and the flame front were found with FeO peaking at the visible flame front and Fe3O4 forming further beyond.Metal fuels such as iron are promising carbon‐free energy carriers
Lukas Braun +7 more
wiley +1 more source
VOID URBANISM: Unbuilt New Cities and State Formation in the Democratic Republic of Congo
International Journal of Urban and Regional Research, EarlyView.Abstract Based on an analysis of the planning process behind Kitoko City in the Democratic Republic of Congo—a new city project officially launched in 2019 but never implemented—this article examines the political, social, and spatial effects generated by urban initiatives that remain at the stage of intention. It investigates how such unbuilt projects
Patrick Belinga Ondoua
wiley +1 more source
Global Policy, EarlyView.ABSTRACT The European Union's proposed Space Law aims to establish a unified approach for sustainable space activities across the EU. While the EU's satellite constellations contribute to sustainability efforts, they can also have negative environmental impacts.
Elena Cirkovic, Vitali Braun
wiley +1 more source
Spectacle and Spy Stories: The 1954 Royal Commission on Espionage
Australian Journal of Politics &History, EarlyView.ABSTRACT The Menzies government's 1954 royal commission, established to investigate Soviet espionage in Australia, is well known as the backdrop to the Labor Party split. It saw opposition leader H.V. Evatt's demise and ushered in an almost 20‐year period of Liberal Party governance.
Ebony Nilsson
wiley +1 more source
Police department design, political pressure, and racial inequality in arrests
American Journal of Political Science, EarlyView.Abstract This paper theorizes a source of bias in discretionary arrests: strategic limits on police officer learning. Officers have a variety of tactics at their disposal besides arrest that they use for less serious offenses when they judge the underlying behavior to be less severe. In departments led by a chief with special expertise in crime control,
Andrew J. McCall
wiley +1 more source
Asia Pacific Viewpoint, EarlyView.ABSTRACT Since the mid‐2010s, Thai public discourse has villainised upland maize cultivation in northern Thailand for deforestation and environmental degradation through the popular imagery of bald mountains. The attention has prompted a new wave of land‐use interventions urging upland smallholders to replace maize with trees and perennials.
Pin Pravalprukskul +2 more
wiley +1 more source
Kick Solid Rocket Motor Multidisciplinary Design Optimization Using Genetic Algorithm
Journal of Aerospace Technology and Management, 2013 http://dx.doi.org/10.5028/jatm.v5i3.225 In this paper, a multidisciplinary design optimization (MDO) approach of a solid propellant kick rocket motor is considered. A genetic algorithm optimization method has been used.
Fredy Marcell Villanueva +2 more
doaj
Technologies and New Methods for Determining the Burning Rate of Solid Propellants [PDF]
فناوری در مهندسی هوافضا, 2019 The burning rate plays animportant role in determining the performanceandballistic behavior of solid rocket propellant. In this paper, the effect of various factorson burning rate, such as combustion chamber pressure, poropellant grain initial ...
Mohammad Ali Dehnavi, Reza Emami
doaj
A Splitting Architecture for Exact Reduced Coulomb Friction
Computer Graphics Forum, EarlyView.Abstract Existing approaches to frictional contact dynamics typically either modify the Coulomb law to improve numerical robustness or solve the exact law in a fully coupled monolithic form. However, in its reduced form, exact Coulomb friction can be written as a cone complementarity problem with an augmented velocity, which reveals a natural split ...
Hongcheng Song +3 more
wiley +1 more source
The Economic History Review, EarlyView.Abstract The 1430s were characterized by extreme weather conditions, food and fodder shortages, and high mortalities among animals and humans, although the severity of events and their consequences in England have received limited attention. The economic downturn and the depressed customary land market in this decade marked the beginning of the Great ...
Mark Bailey
wiley +1 more source