27 research outputs found
Additive Manufacturing of Multifunctional Components Using High Density Carbon Nanotube Yarn Filaments
Additive manufacturing allows for design freedom and part complexity not currently attainable using traditional manufacturing technologies. Fused Filament Fabrication (FFF), for example, can yield novel component geometries and functionalities because the method provides a high level of control over material placement and processing conditions. This is achievable by extrusion of a preprocessed filament feedstock material along a predetermined path. However if fabrication of a multifunctional part relies only on conventional filament materials, it will require a different material for each unique functionality printed into the part. Carbon nanotubes (CNTs) are an attractive material for many applications due to their high specific strength as well as good electrical and thermal conductivity. The presence of this set of properties in a single material presents an opportunity to use one material to achieve multifunctionality in an additively manufactured part. This paper describes a recently developed method for processing continuous CNT yarn filaments into three-dimensional articles, and summarizes the mechanical, electrical, and sensing performance of the components fabricated in this way
Save Our Children: Overcoming the Narrative that Gays and Lesbians are Harmful to Children
Migrant Numbers Surge, With 3,700-Plus Unaccompanied Children In U.S. Border Patrol Custody; House Minority Leader Kevin McCarthy To Visit Border On Monday; CDC: One In Five Americans Has Received At Least One Vaccine Dose; Biden Turns Focus To Touting And Implementing $1.9 Trillion Relief Package; New Wave Of Lockdowns For Italy As Viruses Spreads; Small Change In CDC Data Tracking Causes Bump In Daily Vaccinations; How Broadway Looks To Stage A Comeback After COVID-19.
http://www.cnn.com/TRANSCRIPTS/2103/14/ndaysun.02.htm
State Mandates for Program Carriage Dispute Resolution: Welcome to the Wide World of Regulation
Incidence and treatment of intraoperative technical problems during endovascular repair of complex abdominal aortic aneurysms
CIRCE: The Canarias InfraRed Camera Experiment for the Gran Telescopio Canarias
The Canarias InfraRed Camera Experiment (CIRCE) is a near-infrared (1-2.5μm) imager, polarimeter and low-resolution spectrograph operating as a visitor instrument for the Gran Telescopio Canarias (GTC) 10.4-m telescope. It was designed and built largely by graduate students and postdocs, with help from the University of Florida (UF) astronomy engineering group, and is funded by the UF and the US National Science Foundation. CIRCE is intended to help fill the gap in near-infrared capabilities prior to the arrival of Especrografo Multiobjecto Infra-Rojo (EMIR) to the GTC and will also provide the following scientific capabilities to compliment EMIR after its arrival: high-resolution imaging, narrowband imaging, high-time-resolution photometry, imaging polarimetry, and low resolution spectroscopy. In this paper, we review the design, fabrication, integration, lab testing, and on-sky performance results for CIRCE. These include a novel approach to the opto-mechanical design, fabrication, and alignment. © 2018 World Scientific Publishing Company.CIRCE was developed with support of the University of Florida and the National Science Foundation (NSF grant AST-0352664). The CIRCE team gratefully acknowledges the collaborative support of the Gran Telescopio Canarias management and staff in this endeavor - both the current staff and, in particular, the long-standing support of the previous Director Pedro Alvarez and the previous Project Scientist J. M. Rodriguez