for the most part. I use an iPhone, in part because the UI works for me, in part because Apple's "walled garden", while limiting, insulates me from an increasing range of malware that I would have to deal with on Android. iOS privacy issues are so far acceptable to me. Android is too open to malware, and too beholden to Google, whose business model depends on your surrendering all your personal information for their use. Blackberry seems like a sunset system, not much future to it. As for Windows, I have had so much grief with MS products over the years that I would never use one if there were any alternative. So for me, iPhone is an imperfect approximation to my ideal. YMMV.
Wish I had mod points. Times change, things get better. What our parents accepted as the way of the world wasn't ok with us. What we think of as part of the landscape is not good enough for our kids. This is progress.
Just curious - assuming you've got an Apple wifi - Does the dual-band Airport Extreme Base station, which has 2.4GHz and 5.8GHz chipsets, alleviate the 2.4GHz blues?
That 5 GHz is actually 5.8 GHz, and there are lots of cordless phones in that freq range. I have three of those in my home, and I have wireless digital headphones (Amphony) that live on the same freq but use a proprietary protocol. I don't think my 5.8GHz wifi gets impaired by the cordless phones or the headphones, but the headphones get clobbered by the wifi. So far, I am the only detectable person on 5.8GHz wifi in my neighborhood. *smug grin* as I look at AirRadar's readout on the high local usage density on 2.4 GHz...
I wonder if you might use sound, but from a phased-array emitter, as is done in modern radar. IIRC, low sound frequencies propagate well in seawater and the higher the frequency, the greater the attenuation. From bandwidth perspective, you'd like to use a higher frequency. The phased-array emitter would let you concentrate the sound into a narrow beam to help overcome attenuation. Maybe some kind of cooperative emitter/DropCam interaction could help keep the beam on target as the camera descends and rises. I agree, DropCam is very cool!
If your institution has in-house counsel, ask them how small a change you could make in a figure to have it be considered a 'different' figure for copyright assignment purposes. If you do, I'd be interested in the answer you get.
"Most preschoolers get scolded for writing on walls, but kids living 13,000 years ago were encouraged to scribble, at least in caves. Among the prolific paintings and other art in the 8 kilometer-long Rouffignac cave system in southwestern France are a number of unusual markings known as finger flutings, which are made by people dragging their hands through the soft silt that lines the cave's walls. By analyzing the finger flutings of modern humans, researchers discovered that the ratio of the distance between the three middle fingers indicate that many of the cave artists were very young children, one as young as 2 or 3 years old. The researchers were also able to tell the children's genders from the shape of the fingers. Some of these flutings were too steady for a toddler, suggesting that an adult guided the child's hand while teaching him or her, the researchers will report this weekend at the archaeology of childhood conference in Cambridge, U.K. Since the children's drawings seemed to be concentrated in one chamber, the researchers believe that the alcove may have been a sort of art school. And some of the drawings were high on the walls and on the ceiling, suggesting that the children were lifted."
Very cool. I love how we can open windows onto our ancestors' lives through a bunch of boring measurements of finger tracks on a dusty cave wall.
Except, IIRC, the Saturn V and the Shuttle - I don't remember their having direct ancestors in the ICBM families. Of course, R&D and operations experience from ICBM vehicles were critical for non-ICBM derived follow-ons...
time: "A key feature of the neutrino velocity measurement is the accuracy of the relative time tagging at CERN and at the OPERA detector. The standard GPS receivers formerly installed at CERN and LNGS would feature an insufficient ~100 ns accuracy for the TOF measurement. Thus, in 2008, two identical systems, composed of a GPS receiver for time-transfer applications Septentrio PolaRx2e [16] operating in “common-view” mode [17] and a Cs atomic clock Symmetricom Cs4000 [18], were installed at CERN and LNGS (see Figs. 3, 5 and 6)."
and "The difference between the time base of the CERN and OPERA PolaRx2e receivers was measured to be (2.3 ± 0.9) ns [22]. This correction was taken into account in the application of the time link."
So time measurements at the emission and detection sites seem to be correlated to within a few nanoseconds, at most.
distance: "The other fundamental ingredient for the neutrino velocity measurement is the knowledge of the distance between the point where the proton time-structure is measured at CERN and the origin of the underground OPERA detector reference frame at LNGS. The relative positions of the elements of the CNGS beam line are known with millimetre accuracy. When these coordinates are transformed into the global geodesy reference frame ETRF2000 [24] by relating them to external GPS benchmarks, they are known within 2 cm accuracy."
Distance measurements between the emitter and detector appear to be known to within an uncertainty that would be sub-nanosecond at c.
TFA gives the clear impression that a lot of skull sweat has gone into "checking the measurements", and there's a residual anomaly. Props to these folks for putting their work out where the world can see and criticize.
given the $62 billion program cost to yield 181 airframes. Followon unit costs were estimated at about $70 million. Whether those estimates are credible, who knows?
Nanodiamond is basically polycrystalline diamond whose individual crystallites are, say, ~10 to 100 nanometers in size. It's still tetrahedrally-bonded carbon (the sp3 carbon bond that defines crystalline diamond) with some non-sp3 stuff (sp2, amorphous C, etc.) in the grain boundaries.
Graphene is single-layer sp2 bonded carbon, think of it as a single layer of graphite. Flat, chicken-wire skeleton, with the same type of bonding you find in pencil lead or other forms of graphite. Very different from diamond.
A "here's what's happening in science" weekly published in England. Look at a few issues in your local library, you'll like it. I've subscribed for over 20 years.
Recent increased usage of stereo displays has been accompanied by public concern about potential adverse effects associated with prolonged viewing of stereo imagery. There are numerous potential sources of adverse effects, but we focused on how vergence–accommodation conflicts in stereo displays affect visual discomfort and fatigue. In one experiment, we examined the effect of viewing distance on discomfort and fatigue. We found that conflicts of a given dioptric value were slightly less comfortable at far than at near distance. In a second experiment, we examined the effect of the sign of the vergence–accommodation conflict on discomfort and fatigue. We found that negative conflicts (stereo content behind the screen) are less comfortable at far distances and that positive conflicts (content in front of screen) are less comfortable at near distances. In a third experiment, we measured phoria and the zone of clear single binocular vision, which are clinical measurements commonly associated with correcting refractive error. Those measurements predicted susceptibility to discomfort in the first two experiments. We discuss the relevance of these findings for a wide variety of situations including the viewing of mobile devices, desktop displays, television, and cinema. Keywords: stereopsis, depth perception, vergence, accommodation, discomfort, fatigue, displays, asthenopia Citation: Shibata, T., Kim, J., Hoffman, D. M., & Banks, M. S. (2011). The zone of comfort: Predicting visual discomfort with stereo displays. Journal of Vision, 11(8):11, 1–29, http://www.journalofvision.org/content/11/8/11, doi:10.1167/11.8.11.
I'm thinking that gov't counsel would note that retention of garbage could: a) present a public health hazard; b) incur high costs for safe retention, which would unduly burden all users of the service; c) present chain-of-custody issues that would be prohibitively expensive to avoid and that are only minimally presented in the retention-of-bits scenario. Hence, data retention by ISPs would not unduly burden them or their users. Pretty easy to distinguish between the costs of retaining bits vs. costs of retaining matter. Not saying I agree with what the LE folks want our ISPs to do, but I don't think your argument would sway a court.
The panel noted that the project was in good shape technically, but that NASA had not budgeted enough for the project initially. In other words, it would have cost less if they'd put more in up front and completed it on schedule. This is why you shouldn't let penny-pinchers be in charge of cost estimates (or anything, for that matter). If they weren't willing to commit sufficient funds to the project, they shouldn't have done it at all.
I concur completely. The rule in aerospace projects, whether civilian or military, is lowball up-front estimates (helps the project get funded) inevitably followed by cost and schedule overruns. Check the F35 as one example. C&S inflation comes from a variety of sources, but the initial lowballing is a major contributor. Good work costs real money. (And yeah, I know real money doesn't guarantee good work.)
I take your point, but "bauxite" is not metallic aluminum. Aluminum is so reactive that it does not occur in the elemental state on earth. Bauxite is a complex aluminum oxide/hydroxide (usually mixed with iron minerals as well) that is the main ore mined in the production of aluminum.
Slashdot Mirror
National Atomic Museum at Kirtland AFB near Albuquerque, NM
National Museum of the Air Force, at Wright-Patterson AFB, Dayton, OH
for the most part. I use an iPhone, in part because the UI works for me, in part because Apple's "walled garden", while limiting, insulates me from an increasing range of malware that I would have to deal with on Android. iOS privacy issues are so far acceptable to me. Android is too open to malware, and too beholden to Google, whose business model depends on your surrendering all your personal information for their use. Blackberry seems like a sunset system, not much future to it. As for Windows, I have had so much grief with MS products over the years that I would never use one if there were any alternative. So for me, iPhone is an imperfect approximation to my ideal. YMMV.
"Another one is where they sell or otherwise break up and restructure the company right before your options vest, making them worthless."
Negotiate that your options vest monthly. Forget waiting a year for vesting, or even six months. Things change too fast now.
You are just as *damaged* as he is. FTFY.
Wish I had mod points. Times change, things get better. What our parents accepted as the way of the world wasn't ok with us. What we think of as part of the landscape is not good enough for our kids. This is progress.
I think you've got it - this is what *Thunderbolt* was intended for all along, don't you think?
Just curious - assuming you've got an Apple wifi - Does the dual-band Airport Extreme Base station, which has 2.4GHz and 5.8GHz chipsets, alleviate the 2.4GHz blues?
That 5 GHz is actually 5.8 GHz, and there are lots of cordless phones in that freq range. I have three of those in my home, and I have wireless digital headphones (Amphony) that live on the same freq but use a proprietary protocol. I don't think my 5.8GHz wifi gets impaired by the cordless phones or the headphones, but the headphones get clobbered by the wifi. So far, I am the only detectable person on 5.8GHz wifi in my neighborhood. *smug grin* as I look at AirRadar's readout on the high local usage density on 2.4 GHz...
I wonder if you might use sound, but from a phased-array emitter, as is done in modern radar. IIRC, low sound frequencies propagate well in seawater and the higher the frequency, the greater the attenuation. From bandwidth perspective, you'd like to use a higher frequency. The phased-array emitter would let you concentrate the sound into a narrow beam to help overcome attenuation. Maybe some kind of cooperative emitter/DropCam interaction could help keep the beam on target as the camera descends and rises. I agree, DropCam is very cool!
If your institution has in-house counsel, ask them how small a change you could make in a figure to have it be considered a 'different' figure for copyright assignment purposes. If you do, I'd be interested in the answer you get.
"but what if the next time it was simply a virus engineered by a rival manufacturer?"
- or a virus engineered by somebody who wanted to short a company's stock...
That abstract is a hoot! Thanks for the grin.
"Most preschoolers get scolded for writing on walls, but kids living 13,000 years ago were encouraged to scribble, at least in caves. Among the prolific paintings and other art in the 8 kilometer-long Rouffignac cave system in southwestern France are a number of unusual markings known as finger flutings, which are made by people dragging their hands through the soft silt that lines the cave's walls. By analyzing the finger flutings of modern humans, researchers discovered that the ratio of the distance between the three middle fingers indicate that many of the cave artists were very young children, one as young as 2 or 3 years old. The researchers were also able to tell the children's genders from the shape of the fingers. Some of these flutings were too steady for a toddler, suggesting that an adult guided the child's hand while teaching him or her, the researchers will report this weekend at the archaeology of childhood conference in Cambridge, U.K. Since the children's drawings seemed to be concentrated in one chamber, the researchers believe that the alcove may have been a sort of art school. And some of the drawings were high on the walls and on the ceiling, suggesting that the children were lifted."
Very cool. I love how we can open windows onto our ancestors' lives through a bunch of boring measurements of finger tracks on a dusty cave wall.
Well, even on Slashdot, we can find a recent discussion of how magnetic fields affect the body, specifically blood viscosity in this case:
http://science.slashdot.org/story/11/06/02/185234/Researcher-Claims-Magnets-Can-Affect-Blood-Viscosity
Except, IIRC, the Saturn V and the Shuttle - I don't remember their having direct ancestors in the ICBM families. Of course, R&D and operations experience from ICBM vehicles were critical for non-ICBM derived follow-ons...
from TFA at http://arxiv.org/pdf/1109.4897v1 regarding the time and distance measurements:
time: "A key feature of the neutrino velocity measurement is the accuracy of the relative time tagging at CERN and at the OPERA detector. The standard GPS receivers formerly installed at CERN and LNGS would feature an insufficient ~100 ns accuracy for the TOF measurement. Thus, in 2008, two identical systems, composed of a GPS receiver for time-transfer applications Septentrio PolaRx2e [16] operating in “common-view” mode [17] and a Cs atomic clock Symmetricom Cs4000 [18], were installed at CERN and LNGS (see Figs. 3, 5 and 6)."
and "The difference between the time base of the CERN and OPERA PolaRx2e receivers was measured to be (2.3 ± 0.9) ns [22]. This correction was taken into account in the application of the time link."
So time measurements at the emission and detection sites seem to be correlated to within a few nanoseconds, at most.
distance: "The other fundamental ingredient for the neutrino velocity measurement is the knowledge of the distance between the point where the proton time-structure is measured at CERN and the origin of the underground OPERA detector reference frame at LNGS. The relative positions of the elements of the CNGS beam line are known with millimetre accuracy. When these coordinates are transformed into the global geodesy reference frame ETRF2000 [24] by relating them to external GPS benchmarks, they are known within 2 cm accuracy."
Distance measurements between the emitter and detector appear to be known to within an uncertainty that would be sub-nanosecond at c.
TFA gives the clear impression that a lot of skull sweat has gone into "checking the measurements", and there's a residual anomaly. Props to these folks for putting their work out where the world can see and criticize.
given the $62 billion program cost to yield 181 airframes. Followon unit costs were estimated at about $70 million. Whether those estimates are credible, who knows?
http://en.wikipedia.org/wiki/Lockheed_Martin_F-22_Raptor
But it's a beautiful airplane, I'll grant you that. Saw it at an airshow in Sacramento. Incredible engineering.
Nanodiamond is basically polycrystalline diamond whose individual crystallites are, say, ~10 to 100 nanometers in size. It's still tetrahedrally-bonded carbon (the sp3 carbon bond that defines crystalline diamond) with some non-sp3 stuff (sp2, amorphous C, etc.) in the grain boundaries.
Graphene is single-layer sp2 bonded carbon, think of it as a single layer of graphite. Flat, chicken-wire skeleton, with the same type of bonding you find in pencil lead or other forms of graphite. Very different from diamond.
A "here's what's happening in science" weekly published in England. Look at a few issues in your local library, you'll like it. I've subscribed for over 20 years.
Recent increased usage of stereo displays has been accompanied by public concern about potential adverse effects associated with prolonged viewing of stereo imagery. There are numerous potential sources of adverse effects, but we focused on how vergence–accommodation conflicts in stereo displays affect visual discomfort and fatigue. In one experiment, we examined the effect of viewing distance on discomfort and fatigue. We found that conflicts of a given dioptric value were slightly less comfortable at far than at near distance. In a second experiment, we examined the effect of the sign of the vergence–accommodation conflict on discomfort and fatigue. We found that negative conflicts (stereo content behind the screen) are less comfortable at far distances and that positive conflicts (content in front of screen) are less comfortable at near distances. In a third experiment, we measured phoria and the zone of clear single binocular vision, which are clinical measurements commonly associated with correcting refractive error. Those measurements predicted susceptibility to discomfort in the first two experiments. We discuss the relevance of these findings for a wide variety of situations including the viewing of mobile devices, desktop displays, television, and cinema.
Keywords: stereopsis, depth perception, vergence, accommodation, discomfort, fatigue, displays, asthenopia Citation: Shibata, T., Kim, J., Hoffman, D. M., & Banks, M. S. (2011). The zone of comfort: Predicting visual discomfort with
stereo displays. Journal of Vision, 11(8):11, 1–29, http://www.journalofvision.org/content/11/8/11, doi:10.1167/11.8.11.
FYI, JPL is managed by CalTech, not NASA http://en.wikipedia.org/wiki/Jet_Propulsion_Laboratory
I'm thinking that gov't counsel would note that retention of garbage could: a) present a public health hazard; b) incur high costs for safe retention, which would unduly burden all users of the service; c) present chain-of-custody issues that would be prohibitively expensive to avoid and that are only minimally presented in the retention-of-bits scenario. Hence, data retention by ISPs would not unduly burden them or their users. Pretty easy to distinguish between the costs of retaining bits vs. costs of retaining matter. Not saying I agree with what the LE folks want our ISPs to do, but I don't think your argument would sway a court.
Our sense of wonder was spent in Iraq, Afghanistan, Goldman-Sachs, and AIG.
The panel noted that the project was in good shape technically, but that NASA had not budgeted enough for the project initially. In other words, it would have cost less if they'd put more in up front and completed it on schedule. This is why you shouldn't let penny-pinchers be in charge of cost estimates (or anything, for that matter). If they weren't willing to commit sufficient funds to the project, they shouldn't have done it at all.
I concur completely. The rule in aerospace projects, whether civilian or military, is lowball up-front estimates (helps the project get funded) inevitably followed by cost and schedule overruns. Check the F35 as one example. C&S inflation comes from a variety of sources, but the initial lowballing is a major contributor. Good work costs real money. (And yeah, I know real money doesn't guarantee good work.)
I take your point, but "bauxite" is not metallic aluminum. Aluminum is so reactive that it does not occur in the elemental state on earth. Bauxite is a complex aluminum oxide/hydroxide (usually mixed with iron minerals as well) that is the main ore mined in the production of aluminum.