Results 31 to 40 of about 113,300 (325)

Wakhan Quadrangle: Exploration and Espionage During and After the Great Game. By Hermann Kreutzmann

open access: yesMountain Research and Development, 2019
Review of: Wakhan Quadrangle: Exploration and Espionage During and After the Great Game. By Hermann Kreutzmann Wiesbaden, Austria: Harrassowitz Verlag, 2017.
Marcus Nüsser
doaj   +1 more source

Government healthcare financing and dwindling oil prices: Any alternatives for OPEC countries?

open access: yesCogent Economics & Finance, 2023
Crude oil is one of the sources by which budgets are financed in OPEC countries. However, the fall in oil prices in 2014 put their governments’ finances under significant pressure. Healthcare was one of the sectors experiencing fiscal strain.
Salem Al Mustanyir
doaj   +1 more source

Octonion Hermitian quadrangles

open access: yesBulletin of the Belgian Mathematical Society - Simon Stevin, 1998
A hermitian quadrangle \(H_nF\) is a polar space (of rank~2) defined by a hermitian sesquilinear form on~\(F^{n+1}\). This works nicely over skew fields like \(\mathbb R\), \(\mathbb C\) or~\(\mathbb H\), but the lack of associativity presents difficulties if one wants to extend the definition to the alternative algebra~\(\mathbb O\) of Cayley numbers.
openaire   +3 more sources

Conditional Rényi Divergence Saddlepoint and the Maximization of α-Mutual Information

open access: yesEntropy, 2019
Rényi-type generalizations of entropy, relative entropy and mutual information have found numerous applications throughout information theory and beyond. While there is consensus that the ways A.
Changxiao Cai, Sergio Verdú
doaj   +1 more source

Pressure generated by partially water-repellent flat thrust bearing with weak water-repellent part

open access: yesNihon Kikai Gakkai ronbunshu, 2021
The generation state of the pressure for partial water-repellent (slip) type flat thrust bearings with high/low slip parts was examined with experiments and infinite width bearing approximation.
Akitoshi TAKEUCHI
doaj   +1 more source

Bistable Mechanisms 3D Printing for Mechanically Programmable Vibration Control

open access: yesAdvanced Engineering Materials, EarlyView.
This work introduces a 3D‐printed bistable mechanism integrated into tuned mass dampers (TMDs) for mechanically adaptive passive vibration suppression. Through optimized geometry, the bistable design provides adaptable vibration reduction across a broad range of scenarios, achieving effective vibration mitigation without complex controls or external ...
Ali Zolfagharian   +4 more
wiley   +1 more source

Geological Mapping of the Debussy Quadrangle (H-14) Preliminary Results [PDF]

open access: yes, 2018
Geological mapping of Mercury is crucial to build an understanding of the history of the planet and to set the context for BepiColombo’s observations [1].
Balme, M. R.   +3 more
core  

Classification of skew translation generalized quadrangles, I [PDF]

open access: yes, 2014
We describe new classification results in the theory of generalized quadrangles (= Tits-buildings of rank 2 and type B-2), more precisely in the (large) subtheory of skew translation generalized quadrangles ("STGQs").
Thas, Koen
core   +4 more sources

Elinvar Materials: Recent Progress and Challenges

open access: yesAdvanced Engineering Materials, EarlyView.
Elinvar materials, exhibiting temperature‐invariant elastic modulus, are critical for precision instruments and emerging technologies. This article reviews recent progress in the field, with a focus on the anomalous thermoelastic behavior observed in key material systems.
Wenjie Li, Yang Ren
wiley   +1 more source

Reduction of Oxide Inclusions During the High‐Frequency Welding of Steel via a Nonthermal Ar/H2 Plasma Jet

open access: yesAdvanced Engineering Materials, EarlyView.
High‐frequency (HF) welding of steel is limited by oxide inclusions that degrade weld quality. This study demonstrates, for the first time, the integration of a nonthermal Ar/H2 dielectric barrier discharge (DBD) plasma jet into HF welding. Local plasma treatment provides effective shielding and in‐situ oxide reduction, resulting in markedly fewer and ...
Viktor Udachin   +4 more
wiley   +1 more source

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