Results 81 to 90 of about 837,208 (348)

Handbook of Establishing and Maintaining Oxygen‐Free Atmospheres

open access: yesAdvanced Engineering Materials, EarlyView.
This study presents a practical framework for creating oxygen‐free atmospheres at ambient pressure using silane‐doped inert gases. The results show that ultra‐low oxygen levels and strongly reduced water content can be achieved through controlled silane dosing, drying systems, and sensor monitoring.
Sascha Jan Zimmermann   +3 more
wiley   +1 more source

Les moulages de Notre-Dame de Laon : une découverte récente

open access: yesIn Situ, 2016
In 2012, during the preparation of the exhibition entitled ‘Notre-Dame de Laon. Des ruines romantiques au renouveau gothique’, forty plaster casts from the nineteenth-century restoration period were discovered.
Caroline Dujon-Attali Ben Mayer
doaj   +1 more source

AMS radiocarbon dating from the Neolithic of eastern Ukraine casts doubts on existing chronologies [PDF]

open access: yes, 2015
The Seversky Donets River (Northern Donets) basin in eastern Ukraine and the Lower Don River valley in Russia were inhabited by populations that have been considered to be one of the earliest pottery-using cultures in Europe.
Lillie, Malcolm   +2 more
core   +1 more source

Additive Gaussian Process Regression for Predictive Design of High‐Performance, Printable Silicones

open access: yesAdvanced Engineering Materials, EarlyView.
A chemistry‐aware design framework for tuning printable polydimethylsiloxane (PDMS) for vat photopolymerization (VPP) is developed using additive Gaussian process (GP) modeling. Polymer network mechanics informs variable groupings, feasible formulation constraints, and interaction variables.
Roxana Carbonell   +3 more
wiley   +1 more source

Are stabilization programs expansionary? [PDF]

open access: yes, 2000
The empirical evidence presented in this paper casts doubts on the by now widely accepted "fact"that exchange rate based stabilization programs are expansionary.
Echenique, Federico, Forteza, Alvaro
core  

Enhancing Strength and Electrical Conductivity in Al–Zr–Sc Conductor Alloys Through Sn and Sr Microalloying and Two‐Step Aging Treatment

open access: yesAdvanced Engineering Materials, EarlyView.
Trace additions of Sn and Sr combined with a two‐step aging treatment are shown to enhance the microstructure and performance of Al–Zr–Sc conductor alloys. Strength and electrical conductivity increase concurrently through accelerated precipitation of fine Al3(Sc, Zr) precipitates and improved dislocation resistance, offering a cost‐effective pathway ...
Quan Shao   +3 more
wiley   +1 more source

Tailored Hierarchical Porous Copper Architectures via Three Dimensional Printing and Pressure‐less Sintering for Next‐Generation Lithium‐Metal Batteries

open access: yesAdvanced Engineering Materials, EarlyView.
A hierarchical porous copper current collector is fabricated via three‐dimensional printing combined with pressureless sintering to stabilize lithium metal anodes. The interconnected architecture lowers local current density, guides uniform Li deposition within pores, and suppresses dendrite growth.
Alok Kumar Mishra, Mukul Shukla
wiley   +1 more source

Micro-firms’ productivity growth in Poland before and during COVID-19: Do industry and region matter?

open access: yesEntrepreneurial Business and Economics Review
Objective: This study proposes a novel empirical analysis of the total factor productivity (TFP) growth for Polish microenterprises, focusing on the effect of the global lockdown in 2020.
Emilia Gosińska   +2 more
doaj   +1 more source

The application of multi-baseline digital close-range photogrammetry in three-dimensional imaging and measurement of dental casts.

open access: yesPLoS ONE, 2017
ObjectiveTo explore a new technique for reconstructing and measuring three-dimensional (3D) models of orthodontic plaster casts using multi-baseline digital close-range photogrammetry (MBDCRP) with a single-lens reflex camera.Study designThirty sets of ...
Xiaoming Fu   +5 more
doaj   +1 more source

Palimpsests of Immaterial Assemblages Taken out of Context: Tracing Pompeians from the Void into the Digital [PDF]

open access: yes, 2015
This paper explores some ontological aspects of archaeological voids and enclosures together with their translations and substitutions, and considers the nature of spaces within material archaeological deposits and artefacts.
Paul Reilly
core   +2 more sources

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