asteroza + filetype:pdf   97

Imec.pdf (application/pdf Object)
Interesting advance in hydroponics infrastructure; using a hydrogel sheet as the growing medium, capped with membranes to keep the nasties out.
thin  film  membrane  hydrogel  hydroponic  agriculture  materials  science  biology  research  japan  IMEC  farming  hydromembrane  filetype:pdf  media:document  Delicious 
august 2011 by asteroza
Slivers.pdf (application/pdf Object)
The sliver approach marries the production capabilities of silicon wafer PV production (advanced methods not available to thin film processes) with the material efficiency of thin film PV. Though cutting out and extracting/mounting the completed cells must be a major pain...
Sliver  bifacial  solar  cell  PV  manufacturing  technology  research  silicon  wafer  deep  etching  thin  film  hack  power  generator  filetype:pdf  media:document  Delicious 
august 2011 by asteroza
Laser_induced_fission_of_Th.pdf (application/pdf Object)
A variation on the accelerator driven thorium system theme, with a laser induced plasma pumping electrons into a tantalum target, dumping gamma (X-ray) into thorium. Rather than a traditional ADSR which fires electrons into a target for neutron spallation into thorium.
bremsstrahlung  radiation  photofission  thorium  xray  pulsed  laser  tartget  tantalum  fission  nuclear  physics  research  filetype:pdf  media:document  Delicious 
august 2011 by asteroza
product_sheet_-_leviathan_heavy_lift_launch_vehicle_rc.pdf (application/pdf Object)
The DIRECT guys are proposing Leviathan, an update to the old Truax Sea Dragon design using annular aerospike rocket engines. Which is exactly the idea I was kicking around with college friends back before 2000. Sea Dragon basically revolved around the logical end to the big dumb booster argument, making a rocket so large that certain materials handling issues become easier. Namely, using submarine pressure hull manufacturing techniques on half inch thick steel plates formed into a cylindrical tank body. You build this in a shipyard, not a clean room hangar. Due to size, sea transport and launh is must, but that ends up making a lot of other things easier. Leviathan neatly sidesteps one of the issues with Sea Dragon; the second stage expandable nozzle skirt. Aerospikes get almost equivalent performance for less complexity and risk. Reusuability is easier at this size, and sets the ground for SSTO.
DIRECT  Leviathan  HLV  heavy  lift  vehicle  rocket  TSTO  space  propulsion  spacecraft  aerospike  reusable  big  dumb  booster  BDB  ocean  launch  launcher  filetype:pdf  media:document  Delicious 
june 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
2008-ECD-NHA-presentation.pdf (application/pdf Object)
Interesting use of recyclable hydroxides to reform biomass or coal/methane into hydrogen in one step at low temperatures with high hydrogen purity and no CO or CO2 production. Though if you want the CO or CO2, you can heat the resulting carbonate output (recaustication like at paper mills) to recover a relatively pure gas stream and recover the hydroxide for recycling back into the process inputs.
biomass  BFR  base  facilitated  reformer  chemical  production  process  materials  science  research  hydroxide  coal  methane  feedstock  hydrogen  gas  carbonate  filetype:pdf  media:document  Delicious 
june 2011 by asteroza
JAW201005current.pdf (application/pdf Object)
Weird inflatable pyramids used as dual purpose saline water solar desalinators and rainwater collectors.
WaterPyramid  solar  seawater  saline  water  desalination  inflatable  structure  cone  pyramid  rainwater  collection  green  energy  sustainability  filetype:pdf  media:document  Delicious 
june 2011 by asteroza
INL_July_2010_Storage_Nuclear_Geothermal_ABR.pdf (application/pdf Object)
Potential gigawatt/year energy storage of nuclear heat via an engineered geothermal thermal energy store
nuclear  reactor  heat  engineered  geothermal  thermal  energy  storage  filetype:pdf  media:document  Delicious 
may 2011 by asteroza
Thermal_Energy_Storage_Forshberg.pdf (application/pdf Object)
Nuclear combustion combined cycle (NCCC) setup is interesting. Use a high temperature reactor with molten salt coolant loop to provide more heat than methane autoignition temperature (630C), slip a molten salt heat exchanger after the compressor but before the combustor of an open air cycle gas turbine combined cycle rig. Run on exclusively reactor heat normally, but pump in methane for peaking. May need a HRSG bypass when not peaking unless you treat the HRSG heat exchanger as a feedwater heater to the primary steam plant of the reactor. Step this up a bit with integrated ASU for oxyfuel ops, a post HRSG exhaust gas heat exchanger to preheat post compressor oxygen before hitting the molten salt exchanger, and flush stored ASU LN2 through an air turbine and pipe the cold exhaust through the steam condenser stack. Similar to the old ANP indirect cycle airplane engine, which is itself an open cycle brayton turbine running on reactor heat.
NACC  nuclear  reactor  heat  thermal  energy  storage  information  reference  steam  accumulator  molten  salt  geothermal  NCCC  combined  cycle  combustion  filetype:pdf  media:document  Delicious 
may 2011 by asteroza
http://www.re-policy.jp/jrepp/JSR2010SMR20101004E.pdf
A rare renewable energy whitepaper in english about japan's energy situation by a japanese group.
japan  renewable  energy  whitepaper  english  green  information  reference  filetype:pdf  media:document  Delicious 
may 2011 by asteroza
Radiator Graphite-Foam.pdf (application/pdf Object)
Interesting concept for using airfoil pressure differential to force air through a heat exchanger embedded in the rear third of an airfoil, while having low frontal drag area. As noted in the PDF, for vehicle applications there will still be a need for an auxiliary fan when stopped, which likely means the airfoil will still be in the engine bay or embedded in the hood to utilize the forced air fan.
Open  pore  porous  high  thermal  conductivity  graphitic  graphite  foam  lightweight  radiator  heat  exchanger  hardware  research  control  materials  science  technology  filetype:pdf  media:document  Delicious 
may 2011 by asteroza
GSTF_WP_E.pdf (application/pdf Object)
American chamber of commerce in japan releases a position paper recommending structural changes to japanese government economic policy, particularly to support small business, reduce market entry barriers, deregulate telecoms and IT, and generally reduce the suck of operating a business in japan.
ACCJ  japan  government  economic  policy  position  paper  business  boost  filetype:pdf  media:document  Delicious 
november 2010 by asteroza
press-Lloyds.pdf (application/pdf Object)
Lloyd's and Hyperion Power Systems are teaming up to do dev work regarding modern shipping using small modular nuclear reactors as powerplants/engines/steam generators for large ships with a defined high speed need. There was some interesting work recently that a three ship fleet with nuclear power for the transpacific container cargo transport market could seriously beat a 4 ship fuel oil powered fleet on a profit and tons/day or tons/mile basis.
Lloyds  Hyperion  small  form  factor  modular  reactor  SMR  steam  power  generator  powerplant  engine  ship  vessel  propulsion  green  energy  transportation  shipping  building  marine  ocean  offshore  filetype:pdf  media:document  Delicious 
november 2010 by asteroza
mel0799.pdf (application/pdf Object)
Now you and 79 of your closest friends can ride the same elevator! (Interesting parallel to the jet business, now going wide, which means the next big step is a large capacity double deck elevator...)
Mitsubishi  electric  high  capacity  elevator  building  architecture  construction  filetype:pdf  media:document  Delicious 
october 2010 by asteroza
5469.pdf (application/pdf Object)
Strange power generator design for a solar wind power satellite poered by the electrons int he solar wind, and intended to be flown outside of the ecliptic, possible as a stationary stratellite above the poles of the sun
Dyson-Harrop  solar  wind  power  satellite  spacecraft  generator  SPS  filetype:pdf  media:document  Delicious 
september 2010 by asteroza
norring_r.pdf (application/pdf Object)
Interesting work on using a MHD on the output of a vapor gas core nuclear reactor to make power for space applications. Potentially reduces the cooling necessary for the overall cycle as it isn't a direct heat engine.
nuclear  reactor  research  power  generator  MHD  vapor  gas  core  space  electric  propulsion  filetype:pdf  media:document  Delicious 
september 2010 by asteroza
CPTAVL Engine and Environment joint paper 180810v2final.pdf (application/pdf Object)
Using an electric supercharger to fill in the power gaps of a conventional turbocharger (particularly turbo lag) in a series configuration, makes for a different sort of hybrid powerplant. Might have legs in the small engine market, as the paper suggests.
CPT  electric  supercharger  conventional  turbocharger  mixed  hybrid  vehicle  EV  HEV  PHEV  green  transportation  automotive  technology  turbo  lag  filetype:pdf  media:document  Delicious 
september 2010 by asteroza
http://arxiv.org/PS_cache/arxiv/pdf/1005/1005.1750v1.pdf
A quantum encryption idea utilizing the secure citadel concept to force the decryption to occur at a specific location.
quantum  cryptography  citadel  secure  location  position  geolocation  security  protocol  network  data  key  exchange  filetype:pdf  media:document  Delicious 
august 2010 by asteroza
22_kalugin.pdf (application/pdf Object)
Neat trick of using a two layer optimized blanket to reduce the amount of accelerator input power required for a accelerator driven subcritical reactor, though how practical it would be is up for debate. Admittedly, this is more oriented for transmutation/actinides burning. For power, you might end up with an inner blanket, lead-bismuth coolant, and a separation/heat exchanger vessel for the main liquid fuel (like a LFTR), and finally an outer heat exchanger from lead to steam (though I would rather use supercritical CO2). There may be an advantage to going to a liquid blanket as well.
CSMSR  cascade  subcritical  molten  salt  reactor  ADS  ADSR  thorium  nuclear  power  generator  proton  accelerator  neutron  spallation  filetype:pdf  media:document  Delicious 
june 2010 by asteroza
etd.pdf (application/pdf Object)
Interesting foamed metal composite with materials penetrating the foam cells to provide radiation defense
materials  science  research  technology  foamed  metal  composite  radiation  shield  shielding  defense  lightweight  boron  water  filetype:pdf  media:document  Delicious 
may 2010 by asteroza
Octal-Study.pdf (application/pdf Object)
Wow, I want one of these badly, especially when the Solaris driver shows up. ZFS ZIL/L2ARC on this would be insane. But, there are rumors that the performance drops badly once you filled an ioDrive fully once (probably because of the wear leveling getting in the way)
FusionIO  IoDrive  Octal  flash  memory  SSD  PCIe  PCIexpress  card  storage  hardware  electronics  devices  filetype:pdf  media:document  Delicious 
may 2010 by asteroza
waste_heat_recovery.pdf (application/pdf Object)
Warsila, the big marine diesel powerplant maker, covering new green energy aspects of future propulsion products. Interesting stuff, like mixed source thermal/pressure recovery (exhaust heat steam recovery turbine coupled with exhaust gas turbo power turbine to drive a single generator) feeding an electric assist motor on the main propeller shaft.
Wartsila  marine  propulsion  powerplant  waste  heat  recovery  thermal  green  energy  hybrid  power  generator  assist  motor  filetype:pdf  media:document  Delicious 
april 2010 by asteroza
100202.pdf (application/pdf Object)
Kaneka has been busy with graphite based thermally conductive yet electrically insulating plastics, with one type getting 300% performance over copper for thermal conductivity (though it's not obvious if the 300% material is electrically insulating)
Kaneka  electrically  insulating  electrical  insulator  thermally  conductive  thermal  filler  graphite  polyester  polymer  PET  resin  Hyperite  plastic  japan  materials  science  research  technology  filetype:pdf  media:document  Delicious 
march 2010 by asteroza
0314.pdf (application/pdf Object)
I wonder how graphite flouride batteries compare to the molten liquid electrode battery research?
graphite  calcium  flouride  battery  energy  storage  high  temperature  materials  science  research  filetype:pdf  media:document  Delicious 
february 2010 by asteroza
http://strathprints.strath.ac.uk/12919/1/McKay_R_Macdonald_M_McInnes_CR_%26_Biggs_JD_-_strathprints_-_Non-Keplerian_orbits_using_low_thrust_high_ISP_propulsion_systems_27_Aug_09.pdf
I don't understand why this is inherently superior to a precessing 90 degree polar orbit wide enough to be larger than the sun radio occult shadow cone, other than maybe fixed position as a statite. You could do stupid aerobraking tricks (or even regular propulsion) on capture to go from a hohmann transfer to a polar orbit (which would require three satellites, but in theory offers better reliability). Shades of the interplanetary superhighway (invariant manifold) technique of riding gravitational curves...
non-keplerian  b-orbit  orbit  orbital  mechanics  PDF  space  research  statite  invariant  manifold  interplanetary  superhighway  filetype:pdf  media:document  Delicious 
october 2009 by asteroza
cushing.pdf (application/pdf Object)
2008 design for a commercial 15K TEU nuclear powered freighter
commercial  nuclear  reactor  cargo  ship  transportation  filetype:pdf  media:document  Delicious 
july 2009 by asteroza
Diplomas and Dropouts final.pdf (application/pdf Object)
A pretty damning report on college graduation rates. Which frankly reinforces my belief that university educations at the first and second year levels are nothing but an exercise in separating people from their money, to help bankroll the rest of the university. That so many colleges are consistently willing to scam the young to fund the Ph.D's is atrocious.
university  college  graduation  rate  report  education  filetype:pdf  media:document  Delicious 
june 2009 by asteroza
09-114.pdf (application/pdf Object)
Singing to the choir about the woes of japanese SME's in a global and domestic marketplace
Harvard  business  school  japan  industry  innovation  case  study  analysis  SME  small  medium  enterprise  barrier  filetype:pdf  media:document  Delicious 
may 2009 by asteroza
hashcache.pdf (application/pdf Object)
This hurts my head because, in a way, this is so simple and awesome. Use a specialized/tweaked hashing algorithm to generate the actual hard disk location of the cached webpage (hash the URL into a filepath for example). Skips the index lookup stage so obviates the need for a web cache index. I wonder if you can do filesystem tricks like altering the create time to match the web server's file age response, so that doing a cache file age check is a compare.
hashcache  edgeXL  web  cache  proxy  indexless  software  algorithm  research  programming  development  webdev  high  performance  caching  WAN  HTTP  accelerator  server  filetype:pdf  media:document  Delicious 
april 2009 by asteroza
meisner-asplos09.pdf (application/pdf Object)
Idea here is to use near consumer grade (500W) cheap power supplies with fast response factors, coupled with aggressive OS sleep software (and maybe SSD's to cut back on the response start lag of spinning disks), to create server arrays that can shed power load to follow computational demand load. Easier to turn off single power supplies working in an array set to cut power than to tweak a single big monolithic power supply.
sharing  green  energy  power  datacenter  supply  reduction  server  high  efficiency  speed  load  response  rails  demand  redundant  consumption  array  PowerNap  inexpensive  filetype:pdf  media:document  Delicious 
march 2009 by asteroza
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