Reposted via F&O Forgotten Nobility
Thursday, January 12, 2017
Aegis Reclaimer 3D Print #3DPrinting #3DThursday
http://ift.tt/1E8EcEY
Reposted via adafruit industries blog
Ungineer3d shared this project on thingiverse!
This is the Aegis Reclaimer, created by Cloud Imperium Games for Star Citizen.
The models were created from the holoviewer model of the Reclaimer found on http://ift.tt/Vfj0uN, and modified to make printable in separate parts.
The print is 19.5 inches when fully assembled. A 3D PDF is included in the files for reference showing all the parts assembled, and individual pieces can be turned off and on.
Every Thursday is #3dthursday here at Adafruit! The DIY 3D printing community has passion and dedication for making solid objects from digital models. Recently, we have noticed electronics projects integrated with 3D printed enclosures, brackets, and sculptures, so each Thursday we celebrate and highlight these bold pioneers!
Have you considered building a 3D project around an Arduino or other microcontroller? How about printing a bracket to mount your Raspberry Pi to the back of your HD monitor? And don’t forget the countless LED projects that are possible when you are modeling your projects in 3D!
Reposted via adafruit industries blog
Wednesday, January 11, 2017
Dental pulp stem cells can be stimulated to restore teeth and reduce the use of fillings
http://ift.tt/2aB80ot
A new method of stimulating the renewal of living stem cells in tooth pulp using an Alzheimer’s drug has been discovered by a team of researchers at King’s College London.
Following trauma or an infection, the inner, soft pulp of a tooth can become exposed and infected. In order to protect the tooth from infection, a thin band of dentine is naturally produced and this seals the tooth pulp, but it is insufficient to effectively repair large cavities. Currently dentists use man-made cements or fillings, such as calcium and silicon-based products, to treat these larger cavities and fill holes in teeth. This cement remains in the tooth and fails to disintegrate, meaning that the normal mineral level of the tooth is never completely restored.
However, in a paper published today in Scientific Reports, scientists from the Dental Institute at King’s College London have proven a way to stimulate the stem cells contained in the pulp of the tooth and generate new dentine – the mineralised material that protects the tooth - in large cavities, potentially reducing the need for fillings or cements.
Injury and direct tooth capping
Scientific Reports- Promotion of natural tooth repair by small molecule GSK3 antagonists
Read more »
Reposted via Next Big Future
A new method of stimulating the renewal of living stem cells in tooth pulp using an Alzheimer’s drug has been discovered by a team of researchers at King’s College London.
Following trauma or an infection, the inner, soft pulp of a tooth can become exposed and infected. In order to protect the tooth from infection, a thin band of dentine is naturally produced and this seals the tooth pulp, but it is insufficient to effectively repair large cavities. Currently dentists use man-made cements or fillings, such as calcium and silicon-based products, to treat these larger cavities and fill holes in teeth. This cement remains in the tooth and fails to disintegrate, meaning that the normal mineral level of the tooth is never completely restored.
However, in a paper published today in Scientific Reports, scientists from the Dental Institute at King’s College London have proven a way to stimulate the stem cells contained in the pulp of the tooth and generate new dentine – the mineralised material that protects the tooth - in large cavities, potentially reducing the need for fillings or cements.
Injury and direct tooth capping
Scientific Reports- Promotion of natural tooth repair by small molecule GSK3 antagonists
Read more »
Reposted via Next Big Future
DIY 64-Step MIDI Sequencer
http://ift.tt/1E8EcEY
Reposted via adafruit industries blog
Sonnikim Official sent in this fascinating video, Sonnikim says :
I just made my own diy midi step sequencer using teensy2.0
board, 74hc165 for button inputs, 74hc595 for led outputs, and lots of
buttons, leds. This works with midi clock(0xF8) signal from DAW to regulate
song speed so it perfectly sync with beats from Ableton Live. It is possible
from editting current teensy usb-midi library to the function “void RealTimeSystem(byte rtb)” and the command “usbMIDI.setHandleRealTimeSystem(RealTimeSystem)”. thanks for checking, and more vids will come up asap. Cheers.
Reposted via adafruit industries blog
Tuesday, January 10, 2017
Hybrid Fusion Fission Molten Salt Reactor
http://ift.tt/2aB80ot
A single HMSR (Hybrid Fusion Fission Molten Salt Reactor) is designed to produce 5 GW thermal power at 700 C, thermal conversion systems should be able to generate 2.1 GW gross electricity. For comparison, the largest PWR's now under construction will convert the same thermal power to 1.6 GW of electricity, i.e., 500 MW less. One could consider using a portion of the extra 500 MW of electrical power resulting from the greater thermal conversion efficiency to operate the HMSR's driven DT fusion source of energetic neutrons.
Because simulations showed that less than 1% of the MSR power is adequate for the HMSR, no more than 50 MW of average DT fusion power is needed for a 5 GWth HMSR if all fusion neutrons are absorbed in the molten salt.
A hybrid molten salt reactor includes a source of energetic neutrons, the energetic neutrons having a typical energy per neutron of 14 MeV or greater, a critical molten salt reactor, and a molten salt comprising a dissolved mixture of fissile actinides and fertile actinides. The molten salt circulates in a loop through the reactor vessel and around the source of energetic neutrons. The fissile actinides and fertile actinides sustain an exothermic nuclear reaction in which the actinides are irradiated by the energetic neutrons, the energetic neutrons inducing subcritical nuclear fission, and undergo critical nuclear fission when circulating through the critical molten salt reactor. A portion of the daughter neutrons generated by nuclear reactions are captured by the fertile actinides in the molten salt and induce transmutation of the fertile actinides into fissile actinides and sustain critical fission chain reactions in the molten salt reactor.
The proposed Fission-Fusion Hybrid Molten Salt Reactor (FFHMSR), combining two subsystems, a deuterium + tritium (DT) fusion reactor surrounded by a neutron-absorbing Fusion Blanket (FB) and a critical Molten Salt fission Reactor (MSR). The molten salt, which contains dissolved actinides, circulates at a high rate between them.
As envisioned the MSR exhibits the large Conversion Ratio of graphite moderated reactors having small fissile and large fertile inventories. DT fusion neutrons irradiating actinides in the molten salt release additional neutrons which increase isotope conversion and fission. Actinide fuel is continually added while fission products are continually removed so the system's operation never requires refueling interruptions. The choice of molten salt as a eutectic mixture of the fluorides of lithium, sodium, and actinide fuel is explained by eliminating other options.
Molten Salt Reactors (MSRs) form a class of novel nuclear fission reactors which in the past have been operated experimentally. The MSR class of designs has been adopted internationally as one of the Generation IV reactor design families to be developed for possible future use, and there is substantial technical research interest in MSR's within the international nuclear engineering community.
Ever since fission breeder design difficulties, costs and constraints were recognized in the 1950s, there have been efforts to find alternative approaches to harvesting fission energy from the more abundant non-fissile but fissionable actinides.
Two pathways for using fissionable actinide isotopes
1. Provide an external source of sufficiently energetic neutrons to induce the fissions without any chain reaction.
2. Transmute the fissionable isotopes into fissile isotopes.
Unlike accelerator driven systems, net energetics need not be an issue in a FFH since fusion releases its own nuclear energy. Proposed FFH schemes can be classified according to whether their fusion fuel feeds are DD or DT. If the proposed fusion system uses a feedstock of deuterium only, then half of its resulting DD fusion reactions would produce 2.45 MeV neutrons. These do not carry enough energy for pathway one but are adequate for pathway two. The other half of the DD reactions would produce 1.01 MeV tritons which, if confined in the plasma, would
fuse with deuterons to yield 14.1 MeV neutrons adequate for pathway one. In this scheme the fusion system is self-supporting since it only exports neutrons and is fueled by natural deuterium. However, the neutron yield is weak compared with the DT case.
If instead the fusion uses a 50/50 DT feedstock of deuterium and tritium, then almost all neutrons produced will be 14.1 MeV neutrons adequate for pathway one.
Ralph Moir has been instrumental in the development of FFH design concepts.
The HMSR can completely consume all supplied actinides using uranium, SNF or thorium fuels, an the steady fission to energetic neutron power ratio is sufficiently large for the neutron source to be less than 1% of total plant power.
Read more » 
Reposted via Next Big Future
A single HMSR (Hybrid Fusion Fission Molten Salt Reactor) is designed to produce 5 GW thermal power at 700 C, thermal conversion systems should be able to generate 2.1 GW gross electricity. For comparison, the largest PWR's now under construction will convert the same thermal power to 1.6 GW of electricity, i.e., 500 MW less. One could consider using a portion of the extra 500 MW of electrical power resulting from the greater thermal conversion efficiency to operate the HMSR's driven DT fusion source of energetic neutrons.
Because simulations showed that less than 1% of the MSR power is adequate for the HMSR, no more than 50 MW of average DT fusion power is needed for a 5 GWth HMSR if all fusion neutrons are absorbed in the molten salt.
A hybrid molten salt reactor includes a source of energetic neutrons, the energetic neutrons having a typical energy per neutron of 14 MeV or greater, a critical molten salt reactor, and a molten salt comprising a dissolved mixture of fissile actinides and fertile actinides. The molten salt circulates in a loop through the reactor vessel and around the source of energetic neutrons. The fissile actinides and fertile actinides sustain an exothermic nuclear reaction in which the actinides are irradiated by the energetic neutrons, the energetic neutrons inducing subcritical nuclear fission, and undergo critical nuclear fission when circulating through the critical molten salt reactor. A portion of the daughter neutrons generated by nuclear reactions are captured by the fertile actinides in the molten salt and induce transmutation of the fertile actinides into fissile actinides and sustain critical fission chain reactions in the molten salt reactor.
The proposed Fission-Fusion Hybrid Molten Salt Reactor (FFHMSR), combining two subsystems, a deuterium + tritium (DT) fusion reactor surrounded by a neutron-absorbing Fusion Blanket (FB) and a critical Molten Salt fission Reactor (MSR). The molten salt, which contains dissolved actinides, circulates at a high rate between them.
As envisioned the MSR exhibits the large Conversion Ratio of graphite moderated reactors having small fissile and large fertile inventories. DT fusion neutrons irradiating actinides in the molten salt release additional neutrons which increase isotope conversion and fission. Actinide fuel is continually added while fission products are continually removed so the system's operation never requires refueling interruptions. The choice of molten salt as a eutectic mixture of the fluorides of lithium, sodium, and actinide fuel is explained by eliminating other options.
Molten Salt Reactors (MSRs) form a class of novel nuclear fission reactors which in the past have been operated experimentally. The MSR class of designs has been adopted internationally as one of the Generation IV reactor design families to be developed for possible future use, and there is substantial technical research interest in MSR's within the international nuclear engineering community.
Ever since fission breeder design difficulties, costs and constraints were recognized in the 1950s, there have been efforts to find alternative approaches to harvesting fission energy from the more abundant non-fissile but fissionable actinides.
Two pathways for using fissionable actinide isotopes
1. Provide an external source of sufficiently energetic neutrons to induce the fissions without any chain reaction.
2. Transmute the fissionable isotopes into fissile isotopes.
Unlike accelerator driven systems, net energetics need not be an issue in a FFH since fusion releases its own nuclear energy. Proposed FFH schemes can be classified according to whether their fusion fuel feeds are DD or DT. If the proposed fusion system uses a feedstock of deuterium only, then half of its resulting DD fusion reactions would produce 2.45 MeV neutrons. These do not carry enough energy for pathway one but are adequate for pathway two. The other half of the DD reactions would produce 1.01 MeV tritons which, if confined in the plasma, would
fuse with deuterons to yield 14.1 MeV neutrons adequate for pathway one. In this scheme the fusion system is self-supporting since it only exports neutrons and is fueled by natural deuterium. However, the neutron yield is weak compared with the DT case.
If instead the fusion uses a 50/50 DT feedstock of deuterium and tritium, then almost all neutrons produced will be 14.1 MeV neutrons adequate for pathway one.
Ralph Moir has been instrumental in the development of FFH design concepts.
The HMSR can completely consume all supplied actinides using uranium, SNF or thorium fuels, an the steady fission to energetic neutron power ratio is sufficiently large for the neutron source to be less than 1% of total plant power.
Read more »
Reposted via Next Big Future
Monday, January 9, 2017
ufo-the-truth-is-out-there: Different States of Matter:...
Sunday, January 8, 2017
wehadfacesthen: Marlon Brando during rehearsals for A Streetcar...
http://ift.tt/1iRSeAO
Reposted via F&O Forgotten Nobility
Marlon Brando during rehearsals for A Streetcar Named Desire, 1951
Reposted via F&O Forgotten Nobility
Saturday, January 7, 2017
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