Results 131 to 140 of about 397,660 (289)

Fabrication and test of a space power boiler feed electromagnetic pump. Part 1: Design and manufacture of pump [PDF]

open access: yes
A three-phase helical induction electromagnetic (EM) pump has been designed and built. This pump was designed for use as the boiler-feed pump of a potassium Rankine-cycle space electric power system.
Gahan, J. W.   +3 more
core   +1 more source

Australia and the Path Not Taken: The Declining Independence and Influence of Middle Powers

open access: yesGlobal Policy, EarlyView.
ABSTRACT Australian foreign policy has famously been distinguished by the search for ‘great and powerful friends’. However, Australia's relationship with its current notional protector and key ally—the United States—has generally had more costs than benefits and, I argue, has consequently not been in Australia's much‐invoked ‘national interest ...
Mark Beeson
wiley   +1 more source

Mobile Work: Handcart and Bicycle Workers Across the Urban Economy of Greater Accra Region

open access: yesArea, EarlyView.
Short Abstract This article explores the role of handcart and bicycle workers—mobile workers—in the urban economy of Accra and Tema, Ghana. Drawing on qualitative fieldwork, it shows how their practices of food vending, e‐waste collection and mobile trade exemplify a form of relational infrastructure that sustains urban life through improvisation ...
Kauê Lopes dos Santos   +1 more
wiley   +1 more source

Computational Investigation on the Combined Effect of Applied Strain and Pore Configuration on Strain Concentrators in Additively Manufactured Metals

open access: yesFatigue &Fracture of Engineering Materials &Structures, EarlyView.
ABSTRACT Metal additive manufacturing (AM) provides a pathway for creating highly optimized components that would be difficult to produce using traditional manufacturing methods. However, regardless of printing parameters or postprocessing, porosity remains a prevalent challenge in AM components because strain concentrates in the vicinity of the pore ...
Erick Adan Ramirez   +3 more
wiley   +1 more source

Lunar penetrometer Patent [PDF]

open access: yes, 1967
Development and characteristics of pentrometer for measuring physical properties of lunar ...
Beswick, A. G.   +2 more
core   +1 more source

Do robots boost productivity? A quantitative meta‐study

open access: yesJournal of Economic Surveys, EarlyView.
ABSTRACT This meta‐study analyzes the productivity effects of industrial robots. More than 1800 estimates from 85 primary studies are collected. The meta‐analytic evidence suggests that robotization has so far provided, at best, a small boost to productivity. There is strong evidence of publication bias in the positive direction.
Florian Schneider
wiley   +1 more source

The Support Paradox: Explaining (Mis)Matches in Refugee Workplace Support

open access: yesJournal of Management Studies, EarlyView.
Abstract Recent refugee movements have spurred corporate initiatives, with workplace support proving critical for integration. However, while research on workplace support for refugees remains limited, the broader support literature highlights paradoxical effects – support either benefits or harms recipients depending on how well it matches their needs.
Robin Pesch, Ebru Ipek
wiley   +1 more source

Robot Adoption and Occupational Health

open access: yesOxford Bulletin of Economics and Statistics, EarlyView.
ABSTRACT How does robotization affect occupational health? In this paper, we investigate the impact of robot diffusion on workplace accidents and deaths in Italy, for the period 2008–2018. We adopt an instrumental variables (IV) approach that exploits robot adoption in Japan and South Korea to deal with endogeneity.
Mattia Filomena, Francesco Principe
wiley   +1 more source

High energy density capacitors for vacuum operation with a pulsed plasma load [PDF]

open access: yes
Results of the effort of designing, fabricating, and testing of a 40 joules/lb (88.2 joules/Kg) high voltage energy storage capacitor suitable for operating a pulsed plasma thruster in a vacuum environment for millions of pulses are presented.
Guman, W. J.
core   +1 more source

Fabrication of the 23-ft Collimating Mirror for the JPL 25-ft Space Simulator [PDF]

open access: yes
Optical, structural, and thermal design criteria and fabrication techniques for collimating mirror in space ...
Eddy, R. P., Heilig, M. R.
core   +1 more source

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