I happen to be in peak physical condition and my basic routine consists of about 15 hours a week of moderate to high intensity activity. I split about 50/50 between aerobic and anerobic activity.
Anyways only about 2 hours of that total time is spent doing "stuff" at the gym like running on the 'mill and lifting. The gym is godaweful boring, SOOO boring, after about an hour I want to shoot myself. Just about its only redeeming value is that its 5 minutes away and open every day 'til 10pm. Everyone complains that the gym is boring, and its TRUE.
The bad news is that there isn't really a substitute for the time expenditure... 60 minutes/day is the baseline. The good news is that there is a whole huge world of other activities out there that are WAY more entertaining.
For example, rock climbing: anaerobic activity, builds strength and balance, but its also a never-ending mental puzzle. Lots of geeks are into climbing, its VERY mental activity, and its a social activity. Trail running: I can run for 60-90 minutes outdoors no problem, it keeps you awake (otherwise you'd trip on a rock) and the constantly changing contour is better for your joints than running on a treadmill. I can only last about 20 minutes on a treadmill before I want to tear my eyes out. Dance! Depending on the type its usually a moderate aerobic activity, plus CHICKS dig it. Whoah. If you want higher intensity check out West African dance. If you really just want to ordinary "gym" stuff then check out your local CrossFit group, which is a kind of circuit training routine that is always changing, there is nothing like doing it in a group to keep motivation and have fun. And there is so much more... parkour, yoga, ultimate frisbee...
Some people here have recommended Nintendo WiiFit etc which is a typical geek solution, but I wouldn't. Two reasons: 1) its not a social activity, and 2) its highly repetitive which is generally not good for the joints and you risk overtraining certain muscle groups (this can later lead to injuries)
Moreover the body can easily store large amount of fat, but its quite hard to gain body weight in muscle except through extreme methods ("bulk" diets and steroid use).
Its kind of like watching an ice berg melt, it takes a long time for not much to happen, and then all the sudden it accelerates and disappears.
When you have more muscle mass, you also burn more calories at rest, and can reach higher levels of exertion thereby burning more calories per hour. So the whole process starts to accelerate.
The US Surgeon General recommends 30 minutes a day, which we can probably take as an absolute minimum. The World Health Organization and several other groups recommend 60 minutes per day for optimal health, 90 if you want to lose weight.
Given the contemporary lifestyle with a busy urban schedule and long work hours that isn't a trivial commitment. There is a lot of pressure to spend time on doing other things (like working), and the health of the population suffers quite a bit because of that.
"Alfred Katzenbach, the director of information technology management at Daimler, has reportedly said that the radio and navigation system in the current S-class Mercedes-Benz requires over 20 million lines of code alone and that the car contains nearly as many ECUs as the new Airbus A380"
The estimate of 100M includes items like the nav system which probably runs on windows mobile or some godawful thing...
The extra body fat is an energy reserve to ensure that fetal development and milk production will not be compromised by a food shortage.
You'd think that wouldn't be an issue in modern society but the scope of this study spans events in history where it was actually quite relevant, i.e., the great depression.
What is difficult to understand for our intuition about this study is that they have found an effect buried in data that is almost entirely background noise. In other words, evolutionary pressure is there, but its such a small effect that you will never see it with casual observation.
If you look at their analysis, you will see that their observation of evolution only explains about 5% of the variance in genetic makeup of the population. So if you look around at your 20 closest friends, you might see evidence of evolutionary changes in just one of them, and even then we are talking about differences in body dimensions that are so small you'd need some instrumentation to assess them.
Given the amount of noise it takes a very long time for gradual changes to result in an obvious effect--an order of magnitude more generations will need to pass by before you see these changes in the population at large.
Spammer makes profit from facebook users. Facebook (+lawyers) make profit from spammer. Is this a new business model? Why isn't this a class-action lawsuit?
Actually N=30 is a pretty reasonable size for many studies, and its fairly typical for lots of behavioral research where you just need to show that some effect exists and are not interested in precisely measuring its magnitude. The test for statistical significance is modified appropriately for the sample size, so you can't just dismiss results arbitrarily on the basis of N alone.
Also statistical power is a non-linear scale, so if you do a cost-benefit analysis one usually finds that the cost of testing subjects quickly outweighs the benefit of a smaller standard deviation.
The difficulty with a speeding vehicle is usually for the *other* drivers on the road, who have a more difficult time predicting the trajectory of the speeding vehicle, less time to react to its presence, etc.
Its not a disrespect for authority, its a disrespect for people in general.
These days this statement applies to just about everything of reasonable sophistication, from iPhones to TVs to cruise missiles.
Thanks to the DIY boom (Make Magazine, Arduino, etc) thousands of people now think they know electronics, but the reality is most of that stuff is like some kind of sad joke, at best you could make an IED, but making something that actually works reliably with repeatable instrumentation standards is several orders of magnitude more difficult.
Obviously the nano scale fabrication seen here is an innovation, but the idea of acoustic-optical interactions is not a fundamentally new one. For example an acousto-optical tunable filter uses piezo-actuation (sound) to setup standing waves in a crystal that modulates a band-pass filter. http://en.wikipedia.org/wiki/Acousto-optics
RTFA, they measure the cost to "build and fuel" a 4.6 litre SUV at 55 gigajoules, and feeding a medium sized dog 259kg food yearly at 135 Gj.
This leaves several costs still unaccounted for on both sides: namely, maintenance: both of the car and the dog in terms of driving to the doggy park, vet services, etc. Presumably those are less significant... anyways the point is to get a rough idea of the magnitude of pet impact, not to make an exact accounting relative to SUVs.
Pets are associated with a multi-billion dollar economy, their products take up measurable floorspace in any grocery store, and those products have to be manufactured and transported in trucks and customers' cars, all of which has a measurable impact. There are obviously some variables depending on pet-owner lifestyle, some of which are pretty significant--such as cat litter which is a terrible method of waste disposal. Pets living in rural environments will tend to have much less impact than pets living in cities as this saves you the need to drive them to the dog park every day, or use cat litter for house cats, etc.
Dual ethernet is pretty much a standard feature for a small office server, lets you set up firewalls, remote access and other public-side facing services. And they could have made space for it by removing a few of the USB ports, 5 USB ports seems kinda overkill for a machine that isn't intended for desktop use.
FWIW I haven't used OSX Server in a few years but last time I did the GUI config tools were okay but not amazing. Some of the services were pretty smooth to config, but the hard stuff was still hard. For example to setup Apache you still pretty much had to be an expert in httpd.conf arcana even though you didn't actually have to edit the files by hand (usually).
The greenhouse effect as it applies to cars is that light (mainly visible but also IR as the sun has a lot of this as well and some of it gets through the glass) is transmitted into the car, absorbed by the seats etc, and then re-emitted as infrared, which is then internally reflected by the glass causing rapid thermal gain.
The energy transfer of an optical filter is completely characterized by its transmission, reflection and absorption. So there are three possible approaches to mitigating the problem: reflect the incoming energy you don't want (hard to do without compromising visibility also, and, evidently, radio signals etc), transmit the stuff you don't want better so that internal IR passes more readily *out* of the system (possible but hideously expensive, you need extended bandwidth anti-reflective coatings), and finally: absorb the frequencies you don't want and then take away the heat with another method, typically air convection. This last approach is readily available, its called heat absorbing glass.
Adults don't take care of themselves either, it has been proven over and over. Thus the need for things like social security and universal health coverage.
The government does not make rules because it "knows whats best", its because we (as a society) have figured out that if certain things are not done, it becomes a burden on society. Its a social contract--if you want to play, follow the rules. If you don't want to play, you can go live in a cave.
More likely that is the result of the clean air act. There is an easily visible line in ice core samples where it was passed. Thank the EPA for that one, not CARB.
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I happen to be in peak physical condition and my basic routine consists of about 15 hours a week of moderate to high intensity activity. I split about 50/50 between aerobic and anerobic activity.
Anyways only about 2 hours of that total time is spent doing "stuff" at the gym like running on the 'mill and lifting. The gym is godaweful boring, SOOO boring, after about an hour I want to shoot myself. Just about its only redeeming value is that its 5 minutes away and open every day 'til 10pm. Everyone complains that the gym is boring, and its TRUE.
The bad news is that there isn't really a substitute for the time expenditure... 60 minutes/day is the baseline. The good news is that there is a whole huge world of other activities out there that are WAY more entertaining.
For example, rock climbing: anaerobic activity, builds strength and balance, but its also a never-ending mental puzzle. Lots of geeks are into climbing, its VERY mental activity, and its a social activity. Trail running: I can run for 60-90 minutes outdoors no problem, it keeps you awake (otherwise you'd trip on a rock) and the constantly changing contour is better for your joints than running on a treadmill. I can only last about 20 minutes on a treadmill before I want to tear my eyes out. Dance! Depending on the type its usually a moderate aerobic activity, plus CHICKS dig it. Whoah. If you want higher intensity check out West African dance. If you really just want to ordinary "gym" stuff then check out your local CrossFit group, which is a kind of circuit training routine that is always changing, there is nothing like doing it in a group to keep motivation and have fun. And there is so much more... parkour, yoga, ultimate frisbee...
Some people here have recommended Nintendo WiiFit etc which is a typical geek solution, but I wouldn't. Two reasons: 1) its not a social activity, and 2) its highly repetitive which is generally not good for the joints and you risk overtraining certain muscle groups (this can later lead to injuries)
Cardio improves your endurance, weight training improve instantaneous power. Both build muscle, but with different types of fibers/functions.
I'd say the answer is do both. I think any health professional would agree.
Muscle is about 18% greater density. http://answers.google.com/answers/threadview/id/576481.html
Moreover the body can easily store large amount of fat, but its quite hard to gain body weight in muscle except through extreme methods ("bulk" diets and steroid use).
Its kind of like watching an ice berg melt, it takes a long time for not much to happen, and then all the sudden it accelerates and disappears.
When you have more muscle mass, you also burn more calories at rest, and can reach higher levels of exertion thereby burning more calories per hour. So the whole process starts to accelerate.
The US Surgeon General recommends 30 minutes a day, which we can probably take as an absolute minimum. The World Health Organization and several other groups recommend 60 minutes per day for optimal health, 90 if you want to lose weight.
Given the contemporary lifestyle with a busy urban schedule and long work hours that isn't a trivial commitment. There is a lot of pressure to spend time on doing other things (like working), and the health of the population suffers quite a bit because of that.
From TFA:
"Alfred Katzenbach, the director of information technology management at Daimler, has reportedly said that the radio and navigation system in the current S-class Mercedes-Benz requires over 20 million lines of code alone and that the car contains nearly as many ECUs as the new Airbus A380"
The estimate of 100M includes items like the nav system which probably runs on windows mobile or some godawful thing...
The effect is the signal, not the noise.
The extra body fat is an energy reserve to ensure that fetal development and milk production will not be compromised by a food shortage.
You'd think that wouldn't be an issue in modern society but the scope of this study spans events in history where it was actually quite relevant, i.e., the great depression.
What is difficult to understand for our intuition about this study is that they have found an effect buried in data that is almost entirely background noise. In other words, evolutionary pressure is there, but its such a small effect that you will never see it with casual observation.
If you look at their analysis, you will see that their observation of evolution only explains about 5% of the variance in genetic makeup of the population. So if you look around at your 20 closest friends, you might see evidence of evolutionary changes in just one of them, and even then we are talking about differences in body dimensions that are so small you'd need some instrumentation to assess them.
Given the amount of noise it takes a very long time for gradual changes to result in an obvious effect--an order of magnitude more generations will need to pass by before you see these changes in the population at large.
Spammer makes profit from facebook users. Facebook (+lawyers) make profit from spammer. Is this a new business model? Why isn't this a class-action lawsuit?
Actually N=30 is a pretty reasonable size for many studies, and its fairly typical for lots of behavioral research where you just need to show that some effect exists and are not interested in precisely measuring its magnitude. The test for statistical significance is modified appropriately for the sample size, so you can't just dismiss results arbitrarily on the basis of N alone.
Also statistical power is a non-linear scale, so if you do a cost-benefit analysis one usually finds that the cost of testing subjects quickly outweighs the benefit of a smaller standard deviation.
The difficulty with a speeding vehicle is usually for the *other* drivers on the road, who have a more difficult time predicting the trajectory of the speeding vehicle, less time to react to its presence, etc.
Its not a disrespect for authority, its a disrespect for people in general.
These days this statement applies to just about everything of reasonable sophistication, from iPhones to TVs to cruise missiles.
Thanks to the DIY boom (Make Magazine, Arduino, etc) thousands of people now think they know electronics, but the reality is most of that stuff is like some kind of sad joke, at best you could make an IED, but making something that actually works reliably with repeatable instrumentation standards is several orders of magnitude more difficult.
Obviously the nano scale fabrication seen here is an innovation, but the idea of acoustic-optical interactions is not a fundamentally new one. For example an acousto-optical tunable filter uses piezo-actuation (sound) to setup standing waves in a crystal that modulates a band-pass filter. http://en.wikipedia.org/wiki/Acousto-optics
This article in New Scientist has considerably more information about the impact of pets beyond food:
http://www.newscientist.com/article/mg20427311.600-how-green-is-your-pet.html?DCMP=OTC-rss&nsref=online-news
RTFA, they measure the cost to "build and fuel" a 4.6 litre SUV at 55 gigajoules, and feeding a medium sized dog 259kg food yearly at 135 Gj.
This leaves several costs still unaccounted for on both sides: namely, maintenance: both of the car and the dog in terms of driving to the doggy park, vet services, etc. Presumably those are less significant... anyways the point is to get a rough idea of the magnitude of pet impact, not to make an exact accounting relative to SUVs.
Pets are associated with a multi-billion dollar economy, their products take up measurable floorspace in any grocery store, and those products have to be manufactured and transported in trucks and customers' cars, all of which has a measurable impact. There are obviously some variables depending on pet-owner lifestyle, some of which are pretty significant--such as cat litter which is a terrible method of waste disposal. Pets living in rural environments will tend to have much less impact than pets living in cities as this saves you the need to drive them to the dog park every day, or use cat litter for house cats, etc.
Dual ethernet is pretty much a standard feature for a small office server, lets you set up firewalls, remote access and other public-side facing services. And they could have made space for it by removing a few of the USB ports, 5 USB ports seems kinda overkill for a machine that isn't intended for desktop use.
FWIW I haven't used OSX Server in a few years but last time I did the GUI config tools were okay but not amazing. Some of the services were pretty smooth to config, but the hard stuff was still hard. For example to setup Apache you still pretty much had to be an expert in httpd.conf arcana even though you didn't actually have to edit the files by hand (usually).
The greenhouse effect as it applies to cars is that light (mainly visible but also IR as the sun has a lot of this as well and some of it gets through the glass) is transmitted into the car, absorbed by the seats etc, and then re-emitted as infrared, which is then internally reflected by the glass causing rapid thermal gain.
The energy transfer of an optical filter is completely characterized by its transmission, reflection and absorption. So there are three possible approaches to mitigating the problem: reflect the incoming energy you don't want (hard to do without compromising visibility also, and, evidently, radio signals etc), transmit the stuff you don't want better so that internal IR passes more readily *out* of the system (possible but hideously expensive, you need extended bandwidth anti-reflective coatings), and finally: absorb the frequencies you don't want and then take away the heat with another method, typically air convection. This last approach is readily available, its called heat absorbing glass.
Adults don't take care of themselves either, it has been proven over and over. Thus the need for things like social security and universal health coverage.
The government does not make rules because it "knows whats best", its because we (as a society) have figured out that if certain things are not done, it becomes a burden on society. Its a social contract--if you want to play, follow the rules. If you don't want to play, you can go live in a cave.
More likely that is the result of the clean air act. There is an easily visible line in ice core samples where it was passed. Thank the EPA for that one, not CARB.
The repayment already is mandatory, federal loans can't be cleared by declaring bankruptcy.
Maybe they shouldn't give loans for people to get worthless degrees...
Just make sure the bus isn't full of shit also, okay? Cuz that would suck.
Actually the fastest sprinting record is more like 30MPH. Most reasonably athletic people could probably hit 13 MPH easily.