Results 111 to 120 of about 354,081 (248)

A Simple Rheology‐Based Framework for Selecting Printing Parameters in Extrusion‐Based Hydrogel Additive Manufacturing

open access: yesPolymer Engineering &Science, EarlyView.
An open analytical framework converts standard rheological measurements directly into the complete extrusion field and slicer‐ready printing parameters for Piston driven printers, enabling rapid operational window of printability in direct ink writing without CFD or machine learning. ABSTRACT Predicting whether a gel formulation will print successfully
Thiago M. C. Rodrigues   +3 more
wiley   +1 more source

Investigating & Improving the Drooping Curve of A Two-Stage Feed Pump [PDF]

open access: yes, 2018
TutorialsA two-stage between-bearing pump of the upgraded material was supplied to replace the existing machine. The pump utilized a higher number of impeller blades to obtain higher efficiency at its design point, but exhibited a drooping head-flow ...
Tzuu Bin, Ng, Bin Ng, Tzuu
core  

Characteristics, properties and limitations of per‐ or polyfluoroalkyl substances (PFASs) and fluoropolymers

open access: yesPolymer International, EarlyView.
An overview and categorization of man‐made per‐ or polyfluoroalkyl substances (PFASs) including low‐molar‐mass and high‐molar‐mass fluorochemicals, and their international regulations is presented. Though certain PFASs are toxic, bioaccumulative and cross the human cellular membranes, others, such as fluoropolymers, are safe, reliable and involved in ...
Bruno Améduri
wiley   +1 more source

Resource reallocation across successive systemic innovations: How Rolls‐Royce shaped the evolution of the turbojet, turboprop, and turbofan

open access: yesStrategic Management Journal, EarlyView.
Abstract Research Summary Despite the importance of resource reallocation in shaping a variety of strategic outcomes, strategy scholars have paid only limited attention to the processes by which firms reallocate their resources across successive systemic innovations.
Gino Cattani   +2 more
wiley   +1 more source

Centrifugal Pump Operation, Maintenance, and Reliability [PDF]

open access: yes, 2018
Discussion GroupRepair Specs, use, in house repair specs Lube oil storage and usage Mechanical seals and bearings issues Pump monitoring how are we doing this and how do we want to do this Craft training precision maintenance Best practices for pump
Gottlieb, Adam   +7 more
core   +1 more source

Characteristic Study of a Valve-Matched Flow Single-Piston Miniature Water-Hydraulic Pump

open access: yesIEEE Access
A miniature single-piston valve flow-matching water-hydraulic pump is described in this paper, which designs with a unique double-face cam mechanism to achieve the reciprocating motion of the piston and a new flow-matching valve to adapt to the ...
Tong Xing   +3 more
doaj   +1 more source

Accelerated Surface Reconstruction in Double Perovskites: Enhancing Oxygen Evolution Reaction Activity Through Fe‐Doping

open access: yesSusMat, EarlyView.
A novel double perovskite BaSrNi0.9Fe0.1WO6 (BSNFW) is developed with enhanced oxygen evolution reaction (OER) activity owing to synergistic Ni‒Fe interactions occurring through bridging O species. This drives an accelerated surface reconstruction that equilibrates an oxidized and highly active surface configuration in situ, without the need for ...
Natasha Hales   +8 more
wiley   +1 more source

Research on drain oil interference of pump housing in multi-pump parallel hydraulic system of large aircraft

open access: yesHangkong gongcheng jinzhan
The mutual interference of drain oil of pump housing in the multi-pump parallel hydraulic system of large aircraft directly affects the performance of the aircraft hydraulic system and the flight safety.
GUO Tuanhui   +3 more
doaj   +1 more source

Facilitating Feeling?: The Relationship between Memorials and Emotions

open access: yesSociological Inquiry, EarlyView.
This article explores if and how national memorials impact collective emotions among local residents, focusing on the National Memorial for Peace and Justice (NMPJ) in Montgomery, Alabama. This understudied question is of sociological importance given the change in federal policy regarding public memorials, particularly the removal of references to ...
Ashley V. Reichelmann, James E. Hawdon
wiley   +1 more source

Study on characteristics of a novel water-hydraulic pump with electro-hydrostatic actuator

open access: yesMeitan xuebao
In order to resolve the issues of wear, limited lifespan, and excessive noise commonly associated with traditional swashplate axial piston pumps in aqueous environments,while meeting the reliability requirements for hydraulic pumps in demanding ...
Lin SHEN, Zhangwen QIU, Tong XING
doaj   +1 more source

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