Results 251 to 260 of about 694,244 (371)

Dimensionless Investigations on Energy Conversion and Analysis of Interlayer Time in Laser‐Based Powder Bed Fusion of Polymers for Polyamide 12 with Nanoadditives and Polypropylene

Advanced Engineering Materials, EarlyView.
This study explores the energy conversion in powder bed fusion of polymers using laser beam for polyamide 12 and polypropylene powders. It combines material and process data, using dimensionless parameters and numerical models, to enable the prediction of suitable printing parameters.
Christian Schlör, Moritz Grünewald, Kevin Popp, Ihsan Murat Kusoglu, Stephan Barcikowski, Stan Gann, Thomas Schuffenhauer, Martin Bastian, Claas Bierwisch, Johannes Rudloff   +9 more
wiley   +1 more source

E-commerce of Peruvian SMEs: Determinants of internet sales before and during COVID-19. [PDF]

Heliyon
Ortiz-Chávez MA, Mendoza-Pumapillo JE, Dilas-Jiménez JO, Mugruza-Vassallo CA.   +3 more
europepmc   +1 more source

Lignum-vitae; a study of the woods of the Zygophyllaceae with reference to the true lignum-vitae of commerce--its sources, properties, uses, and substitutes, by Samuel J. Record.

, 1921
Samuel J. Record
openalex   +2 more sources

Assessing the Powder Bed Fusion–Laser Beam Potential of Glass‐Forming Alloys Using Single and Multitrack Laser Glazing Experiments

Advanced Engineering Materials, EarlyView.
Characterizations of the expanse of processes parameter combinations that can be used to minimize cracking and porosity while optimizing crystallization and hardness are used to assess laser processing of four glass‐forming alloys. The set of viable alloys for laser additive manufacturing is not the same as for suction casting; some alloys are common ...
Soumya Mohan, Harrison Holberton, Aaron P. Stebner, Douglas C. Hofmann   +3 more
wiley   +1 more source

Impacts of different interactive elements on consumers' purchase intention in live streaming e-commerce. [PDF]

PLoS One
Liu X, Zhang L.
europepmc   +1 more source

Annals of commerce, manufactures, fisheries and navigation with brief notices of the arts and sciences connected with them, containing the commercial transactions of the British Empire and other countries from the earliest accounts to the meeting of the Union

David A. Macpherson
openalex   +2 more sources

A Novel Approach on Rapid Alloy Development of Tool Steels for Laser Powder Bed Fusion by In Situ Alloying

Advanced Engineering Materials, EarlyView.
A novel approach for alloy development in laser powder bed fusion is introduced. Instead of producing massive samples of one composition at a time, prepressed powder bed samples produced from powder mixtures are processed. Guidelines for the selection of precursor powders are developed.
Felix Großwendt, Anna Strauch, Jonathan Lentz, Arne Röttger, Rainer Fechte‐Heinen, Sebastian Weber, Werner Theisen   +6 more
wiley   +1 more source

Cross-border supply chain coordination of low-carbon agricultural products under the risk of supply uncertainty. [PDF]

PLoS One
Liu Z, Huang N, Hu B, Sun W, Shi L, Zhao Y, Han C.   +6 more
europepmc   +1 more source

A Selection of Cases under the Interstate Commerce Act

, 1923
Robert McN. Davis, Felix Frankfurter
openalex   +2 more sources

Nanoparticle‐Coated X2CrNiMo17‐12‐2 Powder for Additive Manufacturing – Part I: Surface, Flowability, and Optical Properties of SiC, Si, and Si3N4 Coated Metal Powders

Advanced Engineering Materials, EarlyView.
Herein, silicon‐based nanoparticle coatings on X2CrNiMo17‐12‐2 metal powder are presented. The coating process scale, process parameters, nanoparticle size (65–200 nm) as well as the coating amount are discussed regarding powder properties. The surface roughness affects the flowability, while reflectance depends on the coating material and surface ...
Arne Lüddecke, Nick Hantke, Harald Zetzener, Jan T. Sehrt, Arno Kwade   +4 more
wiley   +1 more source