Results 81 to 90 of about 23,962 (275)

Design comparison of cesium and potassium vapor turbine-generator units for space power [PDF]

Design comparison of cesium and potassium vapor turbogenerator units for space power ...
Burton, D. W., Fraas, A. P., Laverne, M. E., Wilson, L. V.   +3 more
core   +1 more source

A Super‐Adhesive Air Filter With Capillarity‐Mediated Spontaneous Particle Absorption via Dynamic Bond Exchange

Advanced Materials, EarlyView.
We address the inherently weak particle adhesion of conventional air filters by coating a dynamically crosslinked adhesive layer that delivers capillarity‐driven strong adhesion and particle absorption mediated by dynamic bond exchange. The resulting enhancement in particle adhesion enables efficient ultrafast (up to 20 m s−1) and omnidirectional ...
Junyong Park, Hyeri Jeon, Hyunwoong Park, Ji Min Lee, Yeomyung Yoon, Gyeong Hwan Choi, Sazzadul A. Rahat, Dong Wook Lee, Sohdam Jeong, Jonathan T. Pham, Chae Bin Kim, Sanghyuk Wooh   +11 more
wiley   +1 more source

Are the firm owners really worse off with a works council? [PDF]

As they are employee associations, it is typically presumed that works councils redistribute economic rents from firm owners to workers. And indeed, empirical literature suggests that works councils reduce profits although, at the same time, they ...
Steffen Mueller
core  

Strong Lateral Confinement of Hydrophilic Silica Nanoparticles on Mg‐Al Layered Double Hydroxides Nanoflakes for Enhanced Thermal Properties

Advanced Materials Interfaces, EarlyView.
A nanostructured, naturally flame‐retardant, and non‐toxic inorganic composite is introduced, which is laterally associated with silica nanoparticles to induce the restacking of the LDH lamella structure, thereby serving as an efficient thermal insulator.
Gayani Pathiraja, Jeffrey Ayerh, Abhijeet Mali, Md Arifur Rahman Khan, Anna Sheets, Shobha Mantripragada, Sherine O. Obare, Tetyana Ignatova   +7 more
wiley   +1 more source

Use of Logistic Regression for Understanding and Prediction of Customer Churn in Telecommunications [PDF]

Statistika: Statistics and Economy Journal, 2019
Customer churn, loss of customers due to switch to another service provider or non-renewal of commitment, is very common in highly competitive and saturated markets such as telecommunications.
Jan Manďák, Jana Hančlová
doaj  

Numerical modeling of the power losses in geared transmissions: Windage, churning and cavitation simulations with a new integrated approach that drastically reduces the computational effort

Tribology International, 2016
Abstract Energy savings and efficient design are the new global trends. Gears are the main components in many applications like vehicle transmissions, industrial gearboxes etc. and although they are already highly efficient, there is still margin for improvement.
CONCLI, FRANCO, GORLA, CARLO
openaire   +1 more source

Notes on the Tax Treatment of Structures [PDF]

More than three quarters of the United States tangible capital stock represents structures. Tax policies potentially have a major impact on both the level and composition of investment in structures and equipment.
James R. Hines Jr., Lawrence H. Summers, Roger H. Gordon   +2 more
core  

Benchmarking Coaxial and Angular Optical Emission Spectroscopy With Recommendations for Reliable Compositional In Situ Monitoring During Laser Powder Bed Fusion

Advanced Materials Technologies, EarlyView.
ABSTRACT Real‐time insight into local chemistry is critical for reliable part quality in additive manufacturing, especially laser powder bed fusion (PBF‑LB/M), where rapid thermal cycles and localized evaporation can undermine part performance. Optical emission spectroscopy (OES) offers non‑intrusive, in situ plume monitoring, but detection geometry ...
Philipp Gabriel, Bastian Jülich, Anna Rosa Ziefuss, Florian Eibl, Stephan Barcikowski   +4 more
wiley   +1 more source

Numerical modeling of the churning power losses in planetary gearboxes: An innovative partitioning‐based meshing methodology for the application of a computational effort reduction strategy to complex gearbox configurations

Lubrication Science, 2017
AbstractThanks to the recent developments in the computer science, simulations are becoming an increasingly widespread approach that can help the designers in the development of new products. In the specific field of gearboxes, simulations are used mainly for structural evaluations.
Concli, Franco, Gorla, Carlo
openaire   +1 more source

Fiscal Churning and Political Efficiency [PDF]

This paper proposes churned transfers as a measure of political inefficiency. A transfer is churned when at least the same level of voter satisfaction could have been achieved by lowering the voter's tax burden by the amount of the transfer.
Filip Palda
core