Results 101 to 110 of about 273,928 (312)

Comparing Building and Neighborhood-Scale Variability of CO2 and O3 to Inform Deployment Considerations for Low-Cost Sensor System Use

Sensors, 2018
The increased use of low-cost air quality sensor systems, particularly by communities, calls for the further development of best-practices to ensure these systems collect usable data.
Ashley Collier-Oxandale, Evan Coffey, Jacob Thorson, Jill Johnston, Michael Hannigan   +4 more
doaj   +1 more source

High‐Temperature Nanoindentation of Metals: Assessing Thermal Drift, Frame Compliance, and Chemical Composition Effects on the Reported Mechanical Properties

Advanced Engineering Materials, EarlyView.
Do not let thermal drift and instrument artifacts deceive high‐temperature nanoindentation results. We compare classical Oliver–Pharr and automatic image recognition analyses across steels and a Ni alloy to quantify these effects. Accounting for artifacts reveals systematic softening with temperature, while Cr and Ni additions boost resistance ...
Velislava Yonkova, Steffen Brinckmann, Ruth Schwaiger   +2 more
wiley   +1 more source

Spreadsheet Numerical Modeling in Secondary School Physics and Biology

Spreadsheets in Education, 2008
The paper gives three examples of numeric modeling with spreadsheets in secondary school (age 15+) physics and biology − free fall in the air, animal population, and damped oscillation. The aim is to introduce the reader to numeric modeling. The simplest
Jan Benacka
doaj   +2 more sources

Experimental Study on the Performance of Secondary Throttling CO2 Heat Pump System for Electric Vehicles

Zhileng xuebao
A CO2 heat pump air conditioning system with single stage compression secondary throttling and series gas cooler is proposed in this paper for further enhancement of the performance of the CO2 heat pump system.
陈浪, 武卫东, 王烽先, 魏嘉祺, 张华   +4 more
doaj  

Current Status and Challenges in Data Collection for Aerospace Coatings Deposited by Plasma Spraying

Advanced Engineering Materials, EarlyView.
An innovative approach has been integrated into the GRENAT project to optimize plasma spraying and coating performance. Raw materials are accelerated and melted in the plasma generated by torches, creating coatings. Monitoring sensors collect process data which are combined with ex situ characterization data.
Lila Randriamananjara, Vincent Rat, Quentin Dubreuil, Patrice Valorge, Simon Goutier, Alain Denoirjean, Olivier Messe, Céline Ruelle, Jean‐Philippe Poli   +8 more
wiley   +1 more source

Comparison of Earth-Air and Earth-Water Ground Tube Heat Exchangers for Residentialal Application

, 2012
Earth-air systems are already commonly applied as a passive technique to reduce the overall energy use of buildings by reducing the required cooling or heating demand. However, they often require large surface area for their installation, and make use of
Liu, Liping, T’Joen, Christophe, Paepe, M. De   +2 more
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Experimental Study on the Performance of Secondary Throttling CO₂ Heat Pump System for Electric Vehicles

Zhileng xuebao
A CO2 heat pump air-conditioning system with single-stage compression secondary throttling and a series gas cooler is proposed to enhance the performance of a CO2 heat pump system. The heating performances of secondary and conventional throttling systems
Chen Lang, Wu Weidong, Wang Fengxian, Wei Jiaqi, Zhang Hua   +4 more
doaj  

Multi-Scale Experimental Analysis of an Air-Assisted Spray Structure of Kerosene

IEEE Access
This study experimentally investigated the transient spray characteristics of an air-assisted injector using kerosene in a constant volume chamber (CVC), with a focus on the effects of ambient pressure and injection control parameters.
Zhuowen Zhao, Minxiang Wei, Zhao Wu, Jingshan Wang, Na Wang   +4 more
doaj   +1 more source

Soft Mechanical‐Electrical Logic Using Liquid Metal‐Filled 3D‐Printed Architectures

Advanced Engineering Materials, EarlyView.
We present 3D‐printed soft mechanical–electrical logic elements that use liquid metal–filled silicone tubes actuated by thermoplastic polyurethane/polylactic acid (TPU/PLA) architectures to produce Boolean operations. Complementary normally open and normally closed unit cells perform repeatable binary transitions and can be combined into more complex ...
Christoph Lehmann, Ryan Kalgreen, Laura M. Comella   +2 more
wiley   +1 more source

A conceptual system design and managerial complexity competency model [PDF]

, 2013
This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University.Complex adaptive systems are usually difficult to design and control.
Amaechi, Austin Oguejiofor
core