Results 121 to 130 of about 1,016,083 (302)

Experimental Evaluation of 100Cr6 Steel Microindented Surfaces Under Lubricated Nonconformal Point Contacts

Advanced Engineering Materials, EarlyView.
The tribological behavior of 100Cr6 steel spheres textured via Vickers microindentation is evaluated under lubricated sliding by varying both dimple size and density. Fine and dense textures significantly reduce friction across all lubrication regimes, while large dimples increase it.
Farideh Davoodi, Pasquale Guglielmi, Gianfranco Palumbo, Giuseppe Carbone   +3 more
wiley   +1 more source

Ground test program for a full-size solar dynamic heat receiver [PDF]

Test hardware, facilities, and procedures were developed to conduct ground testing of a full size, solar dynamic heat receiver in a partially simulated, low Earth orbit environment.
Kaufmann, K. J., Kerslake, T. W., Mclallin, K. L., Sedgwick, L. M.   +3 more
core   +1 more source

Multidimensional Tests of Thermal Protection Materials in the Arcjet Test Facility [PDF]

, 2010
Many thermal protection system materials used for spacecraft heatshields have anisotropic thermal properties, causing them to display significantly different thermal characteristics in different directions, when subjected to a heating environment during ...
Agrawal, Parul, Ellerby, Donald T., Squire, Thomas H., Switzer, Mathew R.   +3 more
core   +2 more sources

In-flight calibration and verification of the Planck-LFI instrument

, 2013
In this paper we discuss the Planck-LFI in-flight calibration campaign. After a brief overview of the ground test campaigns, we describe in detail the calibration and performance verification (CPV) phase, carried out in space during and just after the ...
Baker, Michelle, Battaglia, Paola, Bersanelli, Marco, Butler, Reginald Christophe, Casale, Mauro, Charra, Maryse, Cuevas, Leticia Perez, Cuttaia, Francesco, Davis, Richard, Foley, Steve, Frailis, Marco, Franceschet, Cristian, Franceschi, Enrico, Galeotta, Samuele, Gregorio, Anna, Krassenburg, Mike, Laureijs, René, Leonardi, Rodrigo, Lowe, Steve, Maciaszek, Thierry, Mandolesi, Nazzareno, Maris, Michele, Meinhold, Peter, Melot, Frederick, Mendes, Luis, Mennella, Aniello, Morgante, Gianluca, Pearson, Dave, Rihet, Patrick, Sandri, Maura, Stassi, Patrick, Stringhetti, Luca, Tauber, Jan, Tavagnacco, Daniele, Terenzi, Luca, Texier, Damien, Tomasi, Maurizio, Villa, Fabrizio, Watson, Christopher J., Wilkinson, Althea, Wilson, Philip, Zacchei, Andrea, Zonca, Andrea   +42 more
core   +3 more sources

Carboxylic‐Acid Functionalized Multiwalled Carbon Nanotube‐Alkane‐Based Resistive Temperature Sensor for Cold Chain Applications

Advanced Engineering Materials, EarlyView.
This study presents a reversible temperature sensor with high switching ratio, ∼103. The device is fabricated using PET‐ITO and carbon nanotube dispersions in alkane. Considering its application in cold chain logistics, a proof‐of‐concept with LED is showcased. Thus, a temperature drop below the threshold temperature (crystallization temperature of the
Sunil Kumar Behera, Philippe Marrec, A. Jorge Parola, Madalena Dionísio, Hugo Águas, Andreia F. M. Santos, Hamed Pourkheirollah, Donald Lupo, César A. T. Laia   +8 more
wiley   +1 more source

Prediction of Layered Thermal Conductivity Using Artificial Neural Network in Order to Have Better Design of Ground Source Heat Pump System

Energies, 2018
Ground source heat pumps (GSHPs) have been widely applied worldwide in recent years because of their high efficiency and environmental friendliness. An accurate estimation of the thermal conductivity of rock and soil layers is important in the design of ...
Yanjun Zhang, Ling Zhou, Zhongjun Hu, Ziwang Yu, Shuren Hao, Zhihong Lei, Yangyang Xie   +6 more
doaj   +1 more source

CF6 Jet Engine Performance Improvement: High Pressure Turbine Active Clearance Control [PDF]

An active clearance control system was developed which reduces fuel consumption and performance degradation. This system utilizes compressor discharge air during takeoff and fan discharge air during cruise to impinge on the shroud structure to improve ...
Fasching, W. A., Rich, S. E.
core   +1 more source

High Fidelity Thermal Simulators for Non-Nuclear Testing: Analysis and Initial Results [PDF]

, 2007
Non-nuclear testing can be a valuable tool in the development of a space nuclear power system, providing system characterization data and allowing one to work through various fabrication, assembly and integration issues without the cost and time ...
Bragg-Sitton, Shannon M., Dickens, Ricky, Dixon, David   +2 more
core   +1 more source

Stereotypical escape behavior in Caenorhabditis elegans allows quantification of nociceptive stimuli levels

, 2016
Experiments of pain with human subjects are difficult, subjective, and ethically constrained. Since the molecular mechanisms of pain transduction are reasonably conserved among different species, these problems are partially solved by the use of animal ...
Leung, Kawai, Mohammadi, Aylia, Nemenman, Ilya, Ryu, William S.   +3 more
core   +2 more sources

Harnessing Fungal Biowelding for Constructing Mycelium‐Engineered Materials

Advanced Engineering Materials, EarlyView.
Mycelium‐bound composites (MBCs) offer low‐carbon alternatives for construction, yet interfacial bonding remains a critical challenge. This review examines fungal biowelding as a biocompatible adhesive, elucidating mycelium‐mediated interfacial mechanisms and their role in material assembly. Strategies to optimize biowelding are discussed, highlighting
Xue Brenda Bai, Xinrui Sarah Niu, Zhao Qin   +2 more
wiley   +1 more source