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All three sets (single absorber, 11 absorbers and 44 absorbers) has successfully treating the room by reducing the overall sound pressure level. The greatest …
Low-loss saturable absorbers based on tapered fibers embedded in carbon nanotube /polymer composites. NASA Astrophysics Data System (ADS) Martinez, Amos; Al Araimi, Mohammed; Dmit
That was a big advantage for us.". With NASA funding, North Tonawanda, New York-based Taylor Devices Inc. developed fluidic shock absorbers to safely remove the fuel and electrical connectors from the space shuttles during launch. The company is now employing the technology as seismic dampers to protect structures from earthquakes.
3. Materials and Properties. Neutron absorbers are used to control the criticality of spent nuclear fuel storage systems, including borated stainless steel, B 4 C/Al composite, amorphous alloys, and B/Al alloy. Neutron shielding materials contain polymer-based composites, high density concrete, heavy metals, paraffin, and other neutron …
Loura Hall. President John F. Kennedy wasn't kidding when he said going to the Moon was hard. Much of the technology needed to get to the lunar surface and return didn't exist at the time of Kennedy's famous 1962 speech. And much was unknown. As NASA's Apollo missions were being planned, there was concern that the lunar module …
. The radar cross section (RCS) reduction of hypersonic targets by radar absorbing materials (RAM) coating under different reentry cases is analyzed in the C and X bands frequency range normally used for radar detection. The physical optics method is extended to both the inhomogeneous plasma sheath and RAM layer present …
A lamp waveguide with an integral frequency selective attenuation includes resonant absorbers positioned within the waveguide to absorb spurious out-of-band RF energy. The absorbers have a negligible effect on energy at the selected frequency used to excite plasma in the lamp. In a first embodiment, one or more thin slabs of lossy magnetic ...
The Earth's ozone layer ozone layerThe region of the stratosphere containing the bulk of atmospheric ozone. The ozone layer lies approximately 15-40 kilometers (10-25 miles) above the Earth's surface, in the stratosphere. Depletion of this layer by ozone depleting substances (ODS) will lead to higher UVB levels, which in turn will cause …
Students compete in NASA's Human Exploration Rover Challenge. NASA/MSFC. Piloting the student-built rovers are one male and one driver from each team, simulating the exploration forays of the first Artemis crews on the lunar surface beginning in 2024 when the first woman and next man will land on the surface of Earth's …
In recent years, interfacial solar vapor generation has attracted intensive attention because of the fast solar-driven evaporation and minimum carbon footprint when treating seawater or wastewater (9–33).However, so far, its high evaporation rate cannot be maintained and usually decreases very quickly, particularly when treating a highly …
Based on this understanding of the nonlinear absorption and the importance of singlet and triplet excited states we have begun to develop new two-photon …
Ferrous iron oxides are the most reliable and commonly used oxygen absorbers within the food industry. Oxygen absorbers have been transformed from sachets of dried iron-powder to simple self-adhesive patches to accommodate any custom size, capacity and application. Oxygen concentration can be effectively lowered to 100 ppm, with applications ...
Mg II-Absorbing Galaxies in the UltraVISTA Survey. NASA Astrophysics Data System (ADS) Stroupe, Darren; Lundgren, Britt. . Light that is emitted from distant quasars can
. Solar energy absorbing means in solar collectors are provided by a solar selective carbon surface. A solar selective carbon surface is a microporous carbon surface having pores within the range of 0.2 to 2 micrometers. Such a surface is provided in a microporous carbon article by controlling the pore size.
Semiconducting perovskites that exhibit superfluorescence at room temperature do so because of built-in thermal "shock absorbers" that protect the …
Affiliations. 1 State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China (UESTC), Chengdu 610054, P. R. China. 2 School of Engineering, Brown University, Providence, Rhode Island 02912, United States. PMID: …
The study of ideal absorbers, which can efficiently absorb light over a broad range of wavelengths, is of fundamental importance, as well as critical for many …
The absorber rod, itself, is a 304 stainless steel tube which contains the absorber material. The typical tube dimensions are an external diameter of 9.7 mm and a thickness of 0.5 …
Composition for absorbing hydrogen. DOEpatents. Heung, L.K.; Wicks, G.G.; Enz, G.L. . A hydrogen absorbing composition is described. The composition ...
Porcelain enamel neutron absorbing material. DOEpatents. Iverson, Daniel C. . A porcelain enamel composition as a neutron absorbing material can be prepared of a major proportion by weight of a cadmium compound and a minor proportion of compounds of boron, lithium and silicon. These compounds in the form of a porcelain enamel coating or …
The .gov means it's official. ... Comparison of Graphene and Carbon Nanotube Saturable Absorbers for Wavelength and Pulse Duration Tunability. Syed Asad Hussain Author ... 2008; 320:1308–1308. doi: 10.1126/science.1156965. [Google Scholar] 42. Dresselhaus MS, Jorio A, Hofmann M, Dresselhaus G, Saito R. Perspectives on …
The Effects of UV Light on the Chemical and Mechanical Properties of a Transparent Epoxy-Diamine System in the Presence of an Organic UV Absorber. PubMed Central. Nikafshar, Saeid
January 12, 2005. This material is available primarily for archival purposes. Telephone numbers or other contact information may be out of date; please see current contact information at media contacts.. Arlington, Va.--Researchers at Rensselaer Polytechnic Institute have developed a novel carbon-nanotube-based material that …
Our plasmonic absorbers can be used directly for efficient solar steam generation ( 8, 43, 44) because of the highly efficient, broadband absorption. As outlined in Fig. 4A, our plasmonic absorber shows several unique features. First, the light absorption is efficient (above 99%) across the full solar spectrum.
Here, we propose and demonstrate an alternative approach which utilizes all-dielectric metasurface absorbers that act as universal converters of radiation. Incident THz waves are absorbed by the metasurface, converted to heat, and subsequently detected by an infrared camera. We realize a metasurface consisting of sub-wavelength cylindrical ...
CNT aerogel structures are shown to be good absorbers with a low reflection coefficient, less than -12 dB at 95 GHz. The reflection coefficient of the novel absorber is 3-4 times lower than that of commercial absorbers with identical geometry. Samples prepared by freeze-drying at -25 °C demonstrate resonance behavior, while those prepared at ...
NASA's Orbiting Carbon Observatory, 2 (OCO-2) provides the most complete dataset tracking the concentration of atmospheric carbon dioxide (CO 2), the main driver of climate change.Every day, OCO-2 measures sunlight reflected from Earth's surface to infer the dry-air column-averaged CO 2 mixing ratio and provides around 100,000 cloud-free …
Official websites use .gov ... Development of a controlled microfluidic fabrication method where UV absorbers are integrated into the shell. (3) Novel synthesis routes for the precise production of unique nanoarchitectures encapsulating two complementary active agents: UV sensitive species and UV absorbing substances. ... polymer science, and ...
Design of tunable ultraviolet (UV) absorbance by controlling the Agsbnd Al co-sputtering deposition. NASA Astrophysics Data System (ADS) Zhang, Xin-Yuan; Chen, Lei; Wang, Yaxin; Z
Science.gov is a gateway to U.S. government science information. The portal offers free access to research and development (R&D) results and scientific and technical information from scientific organizations across 13 federal agencies. Science.gov makes it possible for users to search over 60 databases, over 2,200 websites, and over 200 million ...
The nanopatterned absorbers achieve a relative integrated absorption increase of 90% at a normal incident angle of light to as high as 200% at large incident angles, demonstrating the potential of black butterfly structures for light-harvesting purposes in thin-film solar cells. ... taking into account the spectral irradiance of the sun (http ...
In 1995, American National Standards Institute/American Nuclear Society (ANSI/ANS)-8.21-1995, {open_quotes}Use of Fixed Neutron Absorbers in Nuclear Facilities Outside Reactors,{close_quotes} was approved and published as the most recent in a series of standards providing detailed guidance on topics covered in general terms in …