Search found 57 matches

by billy joule
Mon Jan 25, 2016 10:41 pm UTC
Forum: Science
Topic: What's up with avocados?
Replies: 22
Views: 4161

Re: What's up with avocados?

ahammel wrote: It's not super surprising that it lacks human-specific toxins while the dog-specific ones are still there.


That's a myth according to google. The two avocado growers I know have to tie their dogs up as otherwise they eat so many avocados they become obese.
by billy joule
Tue Aug 18, 2015 5:12 am UTC
Forum: News & Articles
Topic: Racial Wealth Gap Persists Despite Degree
Replies: 10
Views: 4101

Re: Racial Wealth Gap Persists Despite Degree

What's most depressing is how the racism persists even to highly educated folks, but I think that can be explained by elitism confounding institutionalized racism. White kids go to the "better" schools, and the minorities go to "worse" schools. So when HR picks the Harvard grad ...
by billy joule
Mon Aug 10, 2015 12:25 am UTC
Forum: Mathematics
Topic: Integration of velocity over a mathematical surface
Replies: 12
Views: 3660

Re: Integration of velocity over a mathematical surface

AFAIK Cd values for spheres are found via experiment (or simulation) because no one has figured out the math to do it analytically, so good luck :) Consider the case of a cylindrical volume of fluid accelerated to speed v by the action of a flat circular plate as shown: In such a case, the kinetic e...
by billy joule
Tue Aug 04, 2015 3:33 am UTC
Forum: Hardware
Topic: What phone should I get?
Replies: 12
Views: 10291

Re: What phone should I get?

http://www.zdnet.com/article/stagefright-just-how-scary-is-it-for-android-users/ Stagefright can hack your phone with an MMS... that is so carefully crafted that your phone never realized you even got the text message to begin with. Once hacked, Android Rootkits can be installed and access your ema...
by billy joule
Tue Aug 04, 2015 12:21 am UTC
Forum: Hardware
Topic: What phone should I get?
Replies: 12
Views: 10291

Re: What phone should I get?

WanderingLinguist wrote:Well, for Android, if you care about updates (and you should!)

Why so?
I've never had a phone that has updated OS, never had a problem. Never heard of any comm. failures due to an old OS.
by billy joule
Mon Aug 03, 2015 11:20 pm UTC
Forum: Serious Business
Topic: Dairy or dairy-free alternative?
Replies: 37
Views: 12336

Re: Dairy or dairy-free alternative?

While its true that there are some locations really don't have to worry about water consumption (NZ) its generally not true. We still worry, I was under water use restrictions summer before last. We worry about water quality too.. 60% of NZs waterways were not safe to swim in in 2013, mainly due to...
by billy joule
Sat May 23, 2015 3:53 am UTC
Forum: Science
Topic: Bladeless Wind Turbine: Do joints look better than fans?
Replies: 17
Views: 3530

Re: Bladeless Wind Turbine: Do joints look better than fans?

I really like that they're safer for birds, which is a big problem with California's wind turbines. It's really not. Note it's a log scale... http://upload.wikimedia.org/wikipedia/commons/thumb/1/1b/Bird_mortality.svg/1920px-Bird_mortality.svg.png http://en.wikipedia.org/wiki/Environmental_impact_o...
by billy joule
Tue May 05, 2015 6:21 am UTC
Forum: Science
Topic: Getting Energy from the Moon's Extreme Temperatures
Replies: 11
Views: 2840

Re: Getting Energy from the Moon's Extreme Temperatures

Without a convenient cold sink (atmosphere, river) a thermal plant is a non-starter. The available temperature doesn't matter if the heat transfer is so poor you need many square kms of heat transfer area.
by billy joule
Sun Mar 08, 2015 11:51 pm UTC
Forum: Fictional Science
Topic: Maximum efficiency when doing work over a distance
Replies: 57
Views: 19456

Re: Maximum efficiency when doing work over a distance

I think screen317's comment highlights my point. Instead of 5 meters away, let's say 1 km away. How much energy would it take to push a ball with a 1 km long stick compared to pushing the ball from 5 m away? If the work done on the ball is the same then the energy is the same. If the sticks are not...
by billy joule
Tue Nov 04, 2014 9:23 am UTC
Forum: Serious Business
Topic: Civilian-enforced traffic laws
Replies: 60
Views: 19425

Re: Civilian-enforced traffic laws

Like I said, one of the outcomes I’d hope / expect to see is a vast overhaul of traffic laws where all the nitpicky things that don’t actually affect safety simply stop being illegal. For example, rolling through stop signs: as long as you wait your turn and don’t cause an actual problem, it should...
by billy joule
Sat Sep 27, 2014 3:29 am UTC
Forum: Serious Business
Topic: Civilian-enforced traffic laws
Replies: 60
Views: 19425

Re: Civilian-enforced traffic laws

Like I said, one of the outcomes I’d hope / expect to see is a vast overhaul of traffic laws where all the nitpicky things that don’t actually affect safety simply stop being illegal. For example, rolling through stop signs: as long as you wait your turn and don’t cause an actual problem, it should...
by billy joule
Thu Sep 18, 2014 7:42 am UTC
Forum: Religious Wars
Topic: stop walking on the escalators
Replies: 107
Views: 45225

Re: stop walking on the escalators

You don't have to complain. You can literally just tap them on the shoulder and say 'Excuse me!' and politely and calmly walk on by. I don't see the problem here? The problem is you look like a crazy person/arsehole when you shout at someone 6 places ahead of you. Some people have trouble saying ex...
by billy joule
Mon Aug 25, 2014 2:46 am UTC
Forum: Science
Topic: Why is it hard to get things cold?
Replies: 15
Views: 4665

Re: Why is it hard to get things cold?

Using radiators not heat pumps for heating houses is really silly and, hopefully, we'll eventually realise this and switch. Well that depends where the heat for the radiators comes from. Using gas heating directly is better than using a heat pump powered by a gas power plant. Using waste heat from ...
by billy joule
Mon Aug 18, 2014 2:47 am UTC
Forum: Religious Wars
Topic: stop walking on the escalators
Replies: 107
Views: 45225

Re: stop walking on the escalators

Also, in what possible way do walkers take up more space? People will still arrange themselves in maximal social comfort, which on escalators seems to be about 1 or 2 steps apart. People do not tend to stand shoulder to shoulder with strangers anyway, so this notion of standers being more compact i...
by billy joule
Sat Aug 16, 2014 1:47 am UTC
Forum: Science
Topic: Aerogel
Replies: 28
Views: 10285

Re: Aerogel

billy joule, it is true that it has nowhere near the lift at regular temperature, but if you get to higher temperatures, it would work better. Around 600°C would help a lot already. I mean the deflated, storage volume of the balloon. e.g. Most balloons are transported in the basket in a horse float...
by billy joule
Sat Aug 16, 2014 1:31 am UTC
Forum: Religious Wars
Topic: stop walking on the escalators
Replies: 107
Views: 45225

Re: stop walking on the escalators

I believe that you should not walk on the escalators at all . You should board them in pairs to maximize throughput, resulting in shorter travel times for all participants. I think boarding them in pairs and walking would make throughput even higher than your half-baked idea of standing still on th...
by billy joule
Thu Aug 14, 2014 7:14 am UTC
Forum: Science
Topic: Aerogel
Replies: 28
Views: 10285

Re: Aerogel

Isn't hot air ballooning basically a hobby with little practical purpose?

Sure, a better insulated balloon will have greater range & lower fuel costs but the order/s of magnitude increase in volume will make transport and storage difficult to say the least..
by billy joule
Thu Aug 07, 2014 12:31 am UTC
Forum: Religious Wars
Topic: stop walking on the escalators
Replies: 107
Views: 45225

Re: stop walking on the escalators

If people stand on the right and walk on the left, that means at least half the escalator is being used more quickly; which in turn means that more people are getting through in the same amount of time. Well that depends completely on the walker:stander ratio. If walkers walk as fast as the escalat...
by billy joule
Fri Jul 25, 2014 6:13 am UTC
Forum: The Help Desk
Topic: Mac Mouse Pad is Broken.
Replies: 14
Views: 5198

Re: Mac Mouse Pad is Broken.

And if you measure the water flow rate you'll probably find it's so small it won't have a measurable effect on absolute humidity in your house. Older/cheaper/poorly designed units do this. If you think about it in terms of energy use, it makes perfect sense to avoid condensing any water because the ...
by billy joule
Fri Jul 25, 2014 12:51 am UTC
Forum: The Help Desk
Topic: Mac Mouse Pad is Broken.
Replies: 14
Views: 5198

Re: Mac Mouse Pad is Broken.

If the air is that humid the only option might be air conditioning or a dehumidifier; if neither of those is available, a fan or a good cross-breeze might help. Cooling the air ( via A/C) will make things worse as relative humidity will increase as the temp. drops and the dew point will move closer...
by billy joule
Thu Jul 24, 2014 1:10 am UTC
Forum: The Help Desk
Topic: Mac Mouse Pad is Broken.
Replies: 14
Views: 5198

Re: Mac Mouse Pad is Broken.

If the air is that humid the only option might be air conditioning or a dehumidifier; if neither of those is available, a fan or a good cross-breeze might help. Cooling the air ( via A/C) will make things worse as relative humidity will increase as the temp. drops and the dew point will move closer...
by billy joule
Mon Jun 16, 2014 9:39 am UTC
Forum: Individual XKCD Comic Threads
Topic: 1379: "4.5 Degrees"
Replies: 879
Views: 150101

Re: 1379: "4.5 Degrees"

If poor people can afford the electricity for incandescent bulbs they buy, they have plenty of money to buy CFL bulbs. It costs about $7 a month to run a 60 watt bulb. A CFL bulb, even if it costs $1.50 more than it currently does, is still affordable to a poor person (as mentioned in the article, ...
by billy joule
Fri Jun 13, 2014 6:32 am UTC
Forum: Hardware
Topic: Leaping to Physical Manufacturing from Comp. Eng background
Replies: 17
Views: 13816

Re: Leaping to Physical Manufacturing from Comp. Eng backgro

The primitive milling strategy of Cut3D means that if I use a 1/16" (~1.6 mm) endmill , the CNC machine is apparently going to take like 4 hours to mill out just one of my molds. I don't even want to know how long a 1/32" (~0.8mm) endmill will take (probably 4x longer). Why aren't you doi...
by billy joule
Sun Jun 08, 2014 9:06 am UTC
Forum: Coding
Topic: Extracting the stress pattern from a text
Replies: 5
Views: 3020

Re: Extracting the stress pattern from a text

How do you plan on generating the melody?
by billy joule
Wed May 28, 2014 11:48 pm UTC
Forum: Science
Topic: Possibly illegal but ostensibly feasible money-making scheme
Replies: 17
Views: 4131

Re: Possibly illegal but ostensibly feasible money-making sc

I'd want to look really closely at the regulations and contracts around metering in your jurisdiction. Chances are that they're a lot more complicated than just saying "the power company cuts you a check for whatever the going rate per kWh is when you put power back onto the grid." Firstl...
by billy joule
Wed May 28, 2014 8:19 am UTC
Forum: Science
Topic: Solar Road Ways
Replies: 82
Views: 14486

Re: Solar Road Ways

PM 2Ring wrote:If we don't spread asphalt over roads where are we going to put it?


Dump it on low lying land to save it from the rising sea level?

I think we'll have the opposite problem, we'll still need asphalt post oil but it'll no longer be a convenient by-product..
by billy joule
Wed May 28, 2014 4:40 am UTC
Forum: Serious Business
Topic: Can (and should) judicial punishment benefit society
Replies: 97
Views: 23298

Re: Can (and should) judicial punishment benefit society

If the black box system was inside the car, it could be based on an alarm. Once you exceed the speed limit, it starts dinging. This exists and IME it is the most effective way to reduce speeding. It drives you crazy. once you get over 105-110 km/hr BEEP BEEP BEEP BEEP BEEP like an 18 wheeler is rev...
by billy joule
Sun May 25, 2014 3:25 am UTC
Forum: Science
Topic: Solar Road Ways
Replies: 82
Views: 14486

Re: Solar Road Ways

They tested the efficacy of the panels covered in dust and noticed only a 11% decrease in power absorption. How i interpret that: "Our baseline efficiency is so much worse than regular panels that dust has little effect!" It's like claiming the gas mileage of a Hummer only reduces by 11% ...
by billy joule
Thu May 22, 2014 9:48 pm UTC
Forum: Science
Topic: Solar Road Ways
Replies: 82
Views: 14486

Re: Solar Road Ways

Is american that land poor that you need to tear up all your roads and lay really expensive solar panels? Would you convert a local field into a solar farm, thereby destroying an ecosystem, in the name of saving the global environment? Yes. Personally, I don't consider intensive farmed monocultures...
by billy joule
Thu May 22, 2014 12:41 am UTC
Forum: Science
Topic: Solar Road Ways
Replies: 82
Views: 14486

Re: Solar Road Ways

I can second this. The cost of establishing new right-of-way easements to transport electricity from random areas to where it's needed is high. If the road IS the easement...well, there you go. That applies if the transmission lines are under the road, underground transmission lines are not a great...
by billy joule
Wed May 21, 2014 7:25 am UTC
Forum: Science
Topic: Solar Road Ways
Replies: 82
Views: 14486

Re: Solar Road Ways

It's a nice thought but... Is american that land poor that you need to tear up all your roads and lay really expensive solar panels? I mean have you run out of room for conventional solar power plants? I can't think of a more inconvenient place to put solar panels :? Would you put them down shady st...
by billy joule
Mon May 19, 2014 7:40 am UTC
Forum: Science
Topic: A new way to produce hydroelectricity
Replies: 38
Views: 9169

Re: A new way to produce hydroelectricity

It's the same concept as the one presented in the original article, but the compressed air has been replaced by the lead on top of the piston. Replacing air with lead changes nothing, It's still a PMM of the first kind. I hate to repeat my self but... The first thing to think is "Where is the ...
by billy joule
Mon May 19, 2014 2:54 am UTC
Forum: Science
Topic: A new way to produce hydroelectricity
Replies: 38
Views: 9169

Re: A new way to produce hydroelectricity

That’s fair enough. If it takes more energy to drive the water out of the tanks than what you are able to generate then it’s obviously not a viable idea. It’s actually little bit of a shame, because other than that it seemed like an interesting idea. No. It never was an interesting idea... It was j...
by billy joule
Tue May 13, 2014 1:46 am UTC
Forum: Science
Topic: If you want a warm room, does energy efficiency matter?
Replies: 28
Views: 9153

Re: If you want a warm room, does energy efficiency matter?

It is possible to get more than 100% (energy) efficient: Use electric power for a heat exchanger . As long as the outside is significantly warmer than 0 K (and I hope for you that this is the case), it can heat the room with much more energy than it requires as electric energy. The ideal system wou...
by billy joule
Sun Dec 08, 2013 8:36 am UTC
Forum: General
Topic: Economic Priorities (poll)
Replies: 13
Views: 7874

Re: Economic Priorities (poll)

EDIT: all those rich people you propose taking away from should just reinvest their money instead of buying shit like luxury yatches. It's a cultural thing perhaps, we should value people who own a factory more than people who own a yatch, assuming the two have the same cost. (and 2 factories is be...
by billy joule
Thu Oct 31, 2013 8:00 pm UTC
Forum: Science
Topic: Flow rate, liquid drag, hydrodynamics problem
Replies: 25
Views: 4928

Re: Flow rate, liquid drag, hydrodynamics problem

A pump must 'suck' and 'blow', you can't do one without the other. A pump cannot increase it's outlet pressure without decreasing it's inlet pressure. Mass must be conserved. "Sucking" is just reducing local pressure with faith that something with higher pressure will move into the empty ...
by billy joule
Wed Oct 30, 2013 10:53 pm UTC
Forum: Science
Topic: Flow rate, liquid drag, hydrodynamics problem
Replies: 25
Views: 4928

Re: Flow rate, liquid drag, hydrodynamics problem

The mass flow itself is not a fixed variable. If you run the downstream pump (or any pump in the li e) harder, the flow will increase. The pumps are like batteries connected in series: the flow is determined by the summed pressure head of all the pumps together, and the summed resistance of all the...
by billy joule
Tue Oct 29, 2013 11:06 pm UTC
Forum: Science
Topic: Flow rate, liquid drag, hydrodynamics problem
Replies: 25
Views: 4928

Re: Flow rate, liquid drag, hydrodynamics problem

I may be missing something fairly significant here, so tell me if I am, but I'm pretty sure you can't do much of anything to lower the downstream intake pressure. Unless we're dealing with Van der Waals forces or something, there's no way that a pump can "suck" oil out of a pipeline any f...
by billy joule
Tue Oct 29, 2013 1:58 am UTC
Forum: Science
Topic: Physics/engineering help - heating
Replies: 9
Views: 3018

Re: Physics/engineering help - heating

Billy - yes, I am controlling the heater, but temperature spikes are an issue. I built a similar system in the past and had huge problems - the issue is simply that heat transfer through the system is not instantaneous. So if the thermistor is near the sample (whose temperature we're trying to main...
by billy joule
Mon Oct 28, 2013 8:56 pm UTC
Forum: Science
Topic: Physics/engineering help - heating
Replies: 9
Views: 3018

Re: Physics/engineering help - heating

You'll need to use Grashofs number to get heat transfer due to natural convection. Your surface temp. will not be constant so this won't be very accurate. How do you plan on controlling the heater? Over powering would not be an issue If you have a thermostat with a small enough hysteresis loop. If y...

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