asteroza + sphere   62

Potential use of lightweight aggregate (LWA) produced from bottom coal ash for internal curing of concrete systems - ScienceDirect
Making coal ash porous spheres into concrete aggregate additive makes for more evenly curing concrete due to water absorption and release
coal  ash  porous  sphere  concrete  aggregate  materials  science  research  technology  construction 
14 days ago by asteroza
Low-Cost SmallSats to Explore to Our Solar System's Boundaries | NASA
bubble enclosed cubesat deep space explorers, using metalicized sphere surfaces as the primary antenna reflector
cubesat  space  research  technology  sphere  membrane  flector  antenna 
april 2019 by asteroza
Azure Sphere - a solution for creating highly-secured, connected MCU powered devices | Microsoft
Huh, Microsoft is pushing out a linux IoT SoC for connecting to their Azure IoT system.
Microsoft  Azure  sphere  IoT  MCU  SoC  chip  linux  service  ARM  Pluton 
april 2018 by asteroza
Storing energy at sea - Forschung Energiespeicher
Recent practical testing of using vacuum style concrete spheres at depth in underwater scenarios to store energy, by pumping seawater in/out of the sphere. Had a practical test to 100m, current pump/turbine tech limited to 700m...
pumped  hydroelectric  power  generator  underwater  vacuum  concrete  sphere  Fraunhofer  storage  energy  StEnSEA 
march 2017 by asteroza
Attenuation efficiency of X-ray and comparison to gamma ray and neutrons in composite metal foams
Wonder what the secondary radiation from hits on the tungsten balls is like for high energy radiation?
tungsten  sphere  stainless  steel  metal  foam  radiation  materials  science  research  technology  shield  shielding  Delicious 
july 2015 by asteroza
Hollow Spheres
These guys are working on innovative ceramic hollow spheres for use in armor applications. One type is just spheres packed onto a backing plate, providing limited flex. The next type is packing spheres into woven tubes of kevlar, creating lumpy bead strings that can be assembled into a flexible armor. Final type is a hex tile module with a limited play interface, allowing small flexibility and easy customization for large area vehicle armor.
engineered  hollow  shell  sphere  hex  heagonal  tile  ceramic  materials  science  research  technology  defense  military  flexible  armor  DARPA  Delicious 
november 2014 by asteroza
Armor Applications
Interesting hollow silicon carbide ceramic shells impregnating metal to create metal foam armor.
low  weight  lightweight  syntactic  armor  plate  silicon  carbide  ceramic  hollow  shell  sphere  defense  military  research  technology  metal  foam  Delicious 
november 2014 by asteroza
PNNL Smartphone Microscope - Available Technologies - PNNL
PNNL putting out 3D printer files for their low cost spherical lens microscope attachment for smartphones.
plastic  sphere  spherical  lens  optics  smartphone  microscope  low  cost  3D  printing  fabbing  CAD  design  file  open  hardware  medicine  health  Delicious 
september 2014 by asteroza
New adidas apparel lowers your temperature and raises your game
New Climachill range of t-shirts with titanium fibers and aluminum spheres to increase heat conductivity for a better cooling effect. I think the spheres might also be doing a tenting effect to increase effective evaporative cooling rates as well.
Adidas  t-shirt  clothing  apparel  cooling  titanium  yarn  fabric  sphere  Delicious 
april 2014 by asteroza
IEEE Xplore - Ocean Renewable Energy Storage (ORES) System: Analysis of an Undersea Energy Storage Concept
Hollow concrete sphere anchors for floating wind turbines do double duty, anchor the turbine, and serving as an energy storage subsystem by pumping water out of the sphere at depth. 30m sphere stores roughly 6MWhr, sweet spot is 750m depth, economically viable at 400m, works at 200m in a pinch, 1500m is pushing it (stress fracture implosion of the vapor head inside would be fierce).
marine  shell  structure  pumped  hardware  underwater  undersea  sphere  ocean  hydro  concrete  anchor  suction  energy  storage  Delicious 
may 2013 by asteroza
Zenta » MorpHex, a morphing hexapod
A walking robot that morphs. A spherical shell to allow rolling propulsion splits to form hexapod legs for walking motion.
hexapod  spherical  sphere  propulsion  walking  rolling  robotics  drone  control  remote  RC  robot  Delicious 
october 2012 by asteroza
One Per Cent: Green Machine: Storing wind power beneath the waves
This seems to be describing an underwater CAES setup, but I though the original concept was actually a pumped hydro based concept. Basically, a strong in compression concrete sphere has a positive displacement pump/generator placed on it, and pumps water out of the sphere at depth. This emulates a pumped hydro dam/lake/reservoir but with a huge hydraulic head. With a deep underwater CAES setup, you run the risk of the sphere becoming buoyant, which kinda defeats the secondary purpose of being an offshore floating wind turbine platform's anchor. Maybe it isn't actually CAES but a simple pressure regulation system to maintain minimum pressure to prevent excess vapor formation (and the risk of ice accumulation)?
CAES  ORES  ocean  offshore  renewable  energy  storage  concrete  sphere  pressure  differential  pumped  hydroelectric  power  generator  green  energy  grid  hydraulic  Delicious 
december 2011 by asteroza
Quanser - Advanced Research
quadrotor ball UAV, which uses quadrotor control techniques, rather than that japanese single rotor ball UAV which relies on thrust vectoring.
Qball-X4  spherical  sphere  ball  cage  electric  quadrotor  quadcopter  UAV  hardware  electronics  devices  Delicious 
july 2011 by asteroza
Slocum.pdf (application/pdf Object)
Smart idea of using oversize concrete anchors that contain concrete pressure spheres to anchor floating offshore wind turbine arrays, using array surplus power to run (what has to be positive displacement) pumps to pump out water from within the sphere into the open ocean. Run the pump in reverse to generate power. Deals with a number of interesting issues in a clever way, such as a CAES setup causing excess buoyancy, and necessary mass for the anchors. I wonder if you can modify the bottom to be a suction anchor as well?
offshore  renewable  energy  storage  system  underwater  pumped  Hydro  hydroelectric  power  generator  floating  wind  turbine  anchor  ballast  dome  sphere  tank  filetype:pdf  media:document  Delicious 
june 2011 by asteroza
Foamy Invention Could Save Energy and Lives | LiveScience
Wow, this press release story is utterly useless. Interesting concept, much like epoxy infused with hollow glass spheres, but I suspect from a cost and manufacturing standpoint it will remain an engineering curiosity and not really applicable to general situations.
composite  matrix  sphere  alloy  metal  foam  materials  science  research  technology  Delicious 
february 2010 by asteroza
Complex Materials Theory Group: Low-Dimensional Sphere Packings
Recent research on random ellipsoid object jammed packing could have big implications in materials science.
ellipsoid  jammed  packing  problem  research  sphere  Delicious 
july 2009 by asteroza

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