That would be fine if everyone was doing exactly the same thing all the time. It works great when one has a bunch of people producing the exact same widgit. It does not work when different workers are given different tasks that have varying and difficult to define complexity. For example, a programmer is given the task of changing the text in a prompt on a web page while another is given the task of optimizing database access for an application. Two vastly different assignments with vastly different times and difficulties where one is well defined and the other is not. How would those two programmers be equitably paid?
How long was it before you threw away the paper and did you shred it?
The whole issue about passwords is that due to the fact the difficult to remember passwords are written down. The vulnerability changes from how secure the password itself is to how physically secure is the paper that the password is written down on. Any cleaning personnel can come in and copy down the user id and password written on a piece of paper. It has also happened that someone has called in a "panic" and have been able to convince someone else to read that information to them.
You misunderstand. We're assuming that the attacker knows that the password is a group of dictionary words.
I thought of that too but that is why it is called a dictionary attack and not the brute force method. The dictionary method is not guaranteed to succeed but it has a chance with the available resources..
The Merriam-Webster Collegiate Dictionary has 165,000 words.
That is true that there are 165,000 words in the dictionary but almost all people do not know all those words. The xkcd comic assumes most people know or would use at most 65,536 words. For example how many people would use or even know how to spell indefatigable.
A couple of questions about your ISP password. 1. Did you write it down when you first got it? 2. How many characters was it? 3. How many times a day did you use it? 4. How long was it before you stopped referring to the written password?
If a password is short enough and used enough times during the day for long enough and it is the only password of the type then it can eventually be remembered. But you have to write it down at least one and refer to that note until the password gets drilled into your head. What would have happened if the password changed every two months. Now instead of having one password to relate to your ISP you have a number of them. How often do you thing one might remember the wrong one?
I was dealing with a 9 letter random password that took me three months to remember because I only used it two or three times a day. If that password changed ever two months I would never remember it. In fact I think the thing that finally kicked it over the edge was the day the VPN was flaky and I had to enter the password about 50 times.
A very important point has been missed in this discussion. The first 9 characters of the initial xkcd password are not random, they are a word. Because they are a word their entropy is not 102^9=1.17165938 * 10^16. Since it is a word and there are a lot less than 102^9 nine letter words xkd assigned them an entropy of 2^16=65536. They then added a few factors to up the entropy of the word to 2^20 = 1048576.
So it breaks down like this. 1. True random 9 character password; very difficult to crack almost impossible to remember (especially if you have more than one). Will always be written down so can be read by anyone.
2. 9 Character word with substitutions, easy to crack easier to remember but written down as the rules for forming one can be complex. Worst of both words.
3. Multi- word pass phrase; if at least five words are use it is much harder than 2. not as hard as 1 but does not need to be written down as it is easy to remember.
So the total force the cables need to support is less than this.
It may be more as one has to support 20KM of cable as well as the repulsive force.
I was talking about acceleration and not top speed. I only referenced speed as an explanation why I picked the example to compare against.
Some maglevs use electromagnetic suspension which as this article states "In current electromagnetic suspension (EMS) systems, the train levitates above a steel rail while electromagnets, attached to the train, are oriented toward the rail from below. "
In electromagnetic suspension there are two sets of electromagnets very close together with very high potentials. At high enough potential insulation will be burnt through and sparks form. They may not be a weight bearing rail but the strips have the same issues.
It is strange how you accuse me of being "not that solid on some of the basic ideas here" when you think that accelerating at.25G will take the same power as accelerating at 3G.
The issue is that the article takes numbers that are much smaller adds a multiplier and says see it is easy. Many mechanical systems do not scale that easily.
The post I was replying to was proposing the use of flywheels to store power generated by PVs during the day. Please read the entire thread before replying.
It is also bad form to quote someone and change their words. It is no longer a quote. If you want to rephrase then quote what you are rephrasing and then type out your version. Otherwise you make it appear that I said something I did not.
That is an assumption on your part and not one I am willing to make. The article states that this process has been though of before but the accelerators have been too expensive. How did they create a cheaper accelerator that is ten times as powerful? The article glosses over that.
Did you even read the second article? Here is the full paragraph about reflection; "While the company emphasizes that the technology is compatible with existing production lines, it does require at least one change. Ordinarily, wafers are treated to create a rough surface texture that helps them absorb light rather than reflect it. The texture is made of pyramids that are about as tall as the Twin Creeks wafers are thick, so it isn't practical to use with the new wafers. Sivaram says the company has implemented an alternative anti-reflection technology that allows its solar cells to perform as well as ones made with the conventional process." They can not use the standard method and must develop an as yet unproven idea. I would be satisfied with a quote of watts/square foot but they didn't state that number for some reason. Why didn't that state such an important number if they are not trying to hide something? The same goes for the cost of the production machine.
Purchasing a PV panel based on price per watt is like purchasing a vehicle base on range between full ups. The vehicle manufacturer just neglects to say that the gas tank is huge.
Sure "[s]ilicon PV has been in use for a while, and processing is very well known" but for wafers that are 10 times as thick. How well is it known for wafers this thin?
I am trying to learn something which is why I asked about the missing information. This article sounds too much like smoke and mirrors to get people to invest.
Costs are still a bit high for flywheels. Here is a quote from this article; "Costs of a fully installed flywheel UPS are about $330 per 15 seconds at one kilowatt." So to supply 1kW for a week it would cost 330*4*60*24*7= $13.3m. Flywheels are great for instant power to level output but not yet viable for long term storage. A flywheel to give power overnight would even be $800k.
Here are a few points that the article do not mention; 1. What is the cost of the hydrogen ion particle accelerator? 2. Is the low cost only taking into account the cost of materials and power and not the amortized cost of the machine? 3. What is the efficiency of the panels? The hint that it is less due to the reflective surface but how much less is an issue. Lower cost is great but if it uses 4 times the area it might not be viable. I love this quote "Sivaram says the company has implemented an alternative anti-reflection technology that allows its solar cells to perform as well as ones made with the conventional process." If the process is not yet implemented it is only a theory and may not work. 4. How resistant are these wafers to the elements?
Yet another "release" that appears to be a technology article but really is a thinly veiled attempt at gathering investment capitol.
When anyone has to comply with multiple regulations for the same thing conflicts can and usually do occur. One regulation may focus on one aspect and give the industry a break on another aspect while a second regulation may do the exact opposite.
For example; Province A regulation states the maximum contract length is 2 years and the maximum monthly penalty is 1/12 of the contract value. This regulation focuses on the contract length while giving a break on the cancellation penalty. Province B regulation stated the maximum contract length be 3 years and the maximum monthly penalty be 1/36 of the contract value. This regulation focuses on the cancellation penalty while allowing longer contracts.
To comply with both regulations industry would have to have 2 year contracts with maximum monthly penalty being 1/36 of the contract value; the worst of both worlds.
Now do that for 10 provinces and see what can happen. Each province will try to balance the regulations between the needs of the people and the needs of industry. The problem comes when industry has to comply with the harshest parts of all regulations. By doing this all semblance of balance is gone.
There are two solutions to this issue; 1. A national regulation; a simple solution that allows for a single contract for anyone in Canada. 2. Separate contracts for each province; Complex as the company has to create and maintain ten different contracts. Difficult for customer service as it is easy to confuse ten similar contracts leading to misinformation and confusion. Difficult to advertise as commercials and literature would be different in each province. Considering I can watch a number of out of province channels I may be presented with a number of different contracts that are not available in my province. Confusing to anyone who moves between provinces as their contract may change to comply with local regulations.
Maybe the solution to this issue is to change the CRTC to be more responsive to the people's needs rather than create ten different regulations.
Regardless of the material, suspending 4 tons doesn't sound so impossible.
I think that you need to read the article again The only place where 4 tons is mentioned is in "a levitating force of about 4 tons per meter of cable length". That is how much force the superconducting wires are repelling each other and has nothing to do with the force on the tethers. Note that the wiki article state "how often". That means it will happen if the tether is under tension. The only variable is how often the tethers need to be replaced.
I never said replacing a tether would be difficult but It would take time. If you are spending more time replacing tethers that launching you are using a lot of money.
There isn't any extra energy involved in going faster when you're in a vacuum
Have you never seen the equation F=MA. Force = mass* acceleration. One of the fastest maglev trains today, the Shaghai maglev train, accelerates at.25G. The article is talking about accelerating at 3G. That is over 10 times the train's acceleration. Also the vacuum is not there due to resistance but to prevent a solid wall of air from forming in the tube as it has nowhere to go.
So it is fine with you that bullies move on to someone else why may not be as big as you or as thick skinned as you. They will eventually find someone smaller and weaker than them to pick on. Bullies will find a target no matter what.
As for fighting back? Difficult when the bullies outweighs you by 50%. The "bullies don't want a fight" is a generalization and not always true. Unless one can put the bully in the hospital some just keep coming back and with friends this time. I had a friend who knew karate. One on one he was unbeatable. The bullies just waited and ganged up on him from ambush. It became a game to see how may times they could beat the crap out of him in one day. Some bullies are cowards others like the challenge.
Thick skin? It is impossible not to react to punches, kicks, etc. When one has been kicked in the leg one will limp and that is all the gratification some bullies need.
It needs to be socially unacceptable to stand around a laugh while someone gets bullied. That is the only way things are going to change.
It looks like the "murder squad" missed a couple of details.
Tethers; The article says that UHMWPE will be fine for the tethers. There is one aspect of UHMWPE that makes it completely unsuitable for those tethers; it is called creep. As long as the tethers are under tension UHMWPE will permanently deform getting longer and longer. At some point they will get thin enough to break. This would mean they would have to be replaced on a regular basis. How often is a factor of tension and heat. It may be that the down time will be so great that there will be no up time and replacing a 20 kM cable is no easy task. This would also mean that every line would have to have a massive tensioner to continually take up the extra slack.
Linear Accelerator; I just love this quote "Maglev passenger trains have carried passengers at nearly 600 kilometers per hour (373 mph) - spacecraft have to be some 50 times faster, but the physics and much of the engineering is the same." One can't just take some numbers, multiply by 50 and assume they will work. That is like saying that we can make a 100 story building so making a 5000 story building would be easy as the "physics and much of the engineering is the same".There is already a problem with going a bit faster that what we do now. There is so much energy in the coils that sparks are forming that are welding the shuttle to the rails. Try to go 50 time that and you have much bigger issues.
I would like to see the entire experiment rather than an incomplete summary. here are a few questions. 1. How long was this effect present? 2. What was the temperature of the LED as the power was decreased? 3. Was the same effect there if the power was started at 0V and slowly increased?
If it only was present for short periods while the power was decreased the effect might even be a capacitance release of power stored in the LED. In the lower efficiency phase electrons may be stored in the LED and released as the power gets lower.
Threatening speech is not and never has been protected speech. It is called assault, as apposed to assault and batter when someone actually gets touched physically.
"I hate the president and I am going to shoot him" is not protected speech as it is a direct threat."I hate the president; lets get together and kill hims" is not protected speech as it is conspiracy to commit murder. "I hate the president because he has sex with little boys" is not protected speech because it is slander. There are many forms of speech that are not protected.
So because you survived and did not commit suicide like many children are doing bullying is OK? Also, you lived in a different world that today's kids. They have so many ways to keep connected. One tweet and everyone in the school knows about it. One Facebook post of an embarrassing picture never goes away. Suicide is a rising issue with children these days. Bullies have no sense of how much it hurts to be the target and the targets are in so much pain that they give up. Bullies 20 years ago are much different than they are today.
I have been in many fights all through school. Did it help? NO; they just got more and attacked me again. This crap about "grow a set" comes straight from bullies and wana be bullies. Sure there are cases where fighting back sometimes works. There are many more cases where fighting back just escalates the violence until someone dies.
Smoking is a personal thing. It does not cause fear, pain and anxiety in innocent kids who just want to go to school and learn. Making a parallel between the two is just stupid.
So i guess you want her to have to go to youth court of something that is small now but could grow very quickly.
And then they get more friend and blindside your kid and put your kid in the hospital or the morgue. Violence only creates more violence and when it is a kid it can be deadly.
Nowhere in the article was there a complete quote; there was only single words. There have been a number of posts here that assume all she said was "I hate you". It is not clear from article that those were the word she used. maybe they were stronger like "I hate him because he was mean to me and he should have the crap beaten out of him". This is yet another article with enough detail to get the "free speech" brigade up in arms without giving enough information to make a logical conclusion about the issue.
There are many schools that "regulate and monitor" speech off school property. Those kids who use bullying speech off school grounds are the same ones who use physical bullying on campus. A target can avoid bullying off campus but when they have to be in the same hallways, change rooms and classrooms as their bullies it becomes impossible. Freedom of speech does not mean freedom to threaten or bully. Would you rather the school handle it or the youth court system? Perhaps if the school did it a bully will learn before he/she get a juvenile record. The juvenile court system is burdened enough as it is without having to deal with issues that could be handled in a much simpler way.
To those who think that anti-bullying campaigns are "nanny brigade" I say you have never been bullied. Personally I got beat up by the entire soccer team I was on because a few bullies started it. Stand up for yourself does not work when it is five to one. You have never had to walk down a hall when you never know when you will be body checked into a locker, have your books slapped out of your hands, be elbowed in the head, etc. Bullies are smart they know where the teachers are and will not be seen.
So the robot can run in a straight line on a perfectly smooth surface with perfect traction; cool but it has a long way to go. Wait till one of those spikes it call feet digs in or slides on some gravel. Show me when you can do this outside in real terrain.
While thin models contribute to some eating disorders like bulimia they are not the main contributor to anorexia. The issue with anorexia is the sufferer's delusional view on how thin they are. I have seen a couple of anorexic models but most are thin and healthy. Most anorexics see themselves a fatter that their goal no matter what their weight is. Even when their pictures and weight are compared against models who are heavier then them anorexics still believe that the model is thinner. Even if thin models are banned there will still be anorexics who view themselves as fatter. That is why it is a disorder as it is a problem with perception and not weight.
I found it and the list is appauling; Hypertension, Peptic Ulcer Disease, Diabetes,Cardiovascular Disease , Coronary Heart Disease , Obesity , Asthma, COPD, Cerebrovascular Disease , Heart Failure, Peripheral Vascular Disease, Chronic Kidney Disease.
They sure missed a few biggies; Cancer, depression, liver disease. All of these diseases would cause in increase in the use of sleeping pills due to pain.
The comparison is done using "specific disease classes". It does not rule out an unknown or undiagnosed illness in the patients that are causing them to use, misuse or abuse sleeping pills. The statistics can only be adjusted for known diagnosed illnesses.
It also does not deal with the issue of people who use sleeping pills responsably; ie not often and only for a couple of nights at a time. Perhaps it is the chronic pill poppers whi are dieing and maybe there is an underlying reason for the insomnia that is causeing the death.
This is a bad study as they do not track any of the following (all of which even a layman can see would have an impact); Perscribed dose, Frequency Actual dose Effectiveness of dose There is no way of knowing if patients are not perscribed dose A, Taking 3X dose A, not sleeping and doing this for months on end. It is easy to see that is class of people may be at risk but the study does not track it.
It mentions "suplimental table 7) but I can not seem to find it.
Slashdot Mirror
That would be fine if everyone was doing exactly the same thing all the time. It works great when one has a bunch of people producing the exact same widgit. It does not work when different workers are given different tasks that have varying and difficult to define complexity. For example, a programmer is given the task of changing the text in a prompt on a web page while another is given the task of optimizing database access for an application. Two vastly different assignments with vastly different times and difficulties where one is well defined and the other is not. How would those two programmers be equitably paid?
How long was it before you threw away the paper and did you shred it?
The whole issue about passwords is that due to the fact the difficult to remember passwords are written down. The vulnerability changes from how secure the password itself is to how physically secure is the paper that the password is written down on. Any cleaning personnel can come in and copy down the user id and password written on a piece of paper. It has also happened that someone has called in a "panic" and have been able to convince someone else to read that information to them.
You misunderstand. We're assuming that the attacker knows that the password is a group of dictionary words.
I thought of that too but that is why it is called a dictionary attack and not the brute force method. The dictionary method is not guaranteed to succeed but it has a chance with the available resources..
The Merriam-Webster Collegiate Dictionary has 165,000 words.
That is true that there are 165,000 words in the dictionary but almost all people do not know all those words. The xkcd comic assumes most people know or would use at most 65,536 words. For example how many people would use or even know how to spell indefatigable.
A couple of questions about your ISP password.
1. Did you write it down when you first got it?
2. How many characters was it?
3. How many times a day did you use it?
4. How long was it before you stopped referring to the written password?
If a password is short enough and used enough times during the day for long enough and it is the only password of the type then it can eventually be remembered. But you have to write it down at least one and refer to that note until the password gets drilled into your head. What would have happened if the password changed every two months. Now instead of having one password to relate to your ISP you have a number of them. How often do you thing one might remember the wrong one?
I was dealing with a 9 letter random password that took me three months to remember because I only used it two or three times a day. If that password changed ever two months I would never remember it. In fact I think the thing that finally kicked it over the edge was the day the VPN was flaky and I had to enter the password about 50 times.
A very important point has been missed in this discussion. The first 9 characters of the initial xkcd password are not random, they are a word. Because they are a word their entropy is not 102^9=1.17165938 * 10^16. Since it is a word and there are a lot less than 102^9 nine letter words xkd assigned them an entropy of 2^16=65536. They then added a few factors to up the entropy of the word to 2^20 = 1048576.
So it breaks down like this.
1. True random 9 character password; very difficult to crack almost impossible to remember (especially if you have more than one). Will always be written down so can be read by anyone.
2. 9 Character word with substitutions, easy to crack easier to remember but written down as the rules for forming one can be complex. Worst of both words.
3. Multi- word pass phrase; if at least five words are use it is much harder than 2. not as hard as 1 but does not need to be written down as it is easy to remember.
So the total force the cables need to support is less than this.
It may be more as one has to support 20KM of cable as well as the repulsive force.
I was talking about acceleration and not top speed. I only referenced speed as an explanation why I picked the example to compare against.
Some maglevs use electromagnetic suspension which as this article states "In current electromagnetic suspension (EMS) systems, the train levitates above a steel rail while electromagnets, attached to the train, are oriented toward the rail from below. "
In electromagnetic suspension there are two sets of electromagnets very close together with very high potentials. At high enough potential insulation will be burnt through and sparks form. They may not be a weight bearing rail but the strips have the same issues.
It is strange how you accuse me of being "not that solid on some of the basic ideas here" when you think that accelerating at .25G will take the same power as accelerating at 3G.
The issue is that the article takes numbers that are much smaller adds a multiplier and says see it is easy. Many mechanical systems do not scale that easily.
The post I was replying to was proposing the use of flywheels to store power generated by PVs during the day. Please read the entire thread before replying.
It is also bad form to quote someone and change their words. It is no longer a quote. If you want to rephrase then quote what you are rephrasing and then type out your version. Otherwise you make it appear that I said something I did not.
That is an assumption on your part and not one I am willing to make. The article states that this process has been though of before but the accelerators have been too expensive. How did they create a cheaper accelerator that is ten times as powerful? The article glosses over that.
Did you even read the second article? Here is the full paragraph about reflection;
"While the company emphasizes that the technology is compatible with existing production lines, it does require at least one change. Ordinarily, wafers are treated to create a rough surface texture that helps them absorb light rather than reflect it. The texture is made of pyramids that are about as tall as the Twin Creeks wafers are thick, so it isn't practical to use with the new wafers. Sivaram says the company has implemented an alternative anti-reflection technology that allows its solar cells to perform as well as ones made with the conventional process."
They can not use the standard method and must develop an as yet unproven idea. I would be satisfied with a quote of watts/square foot but they didn't state that number for some reason. Why didn't that state such an important number if they are not trying to hide something? The same goes for the cost of the production machine.
Purchasing a PV panel based on price per watt is like purchasing a vehicle base on range between full ups. The vehicle manufacturer just neglects to say that the gas tank is huge.
Sure "[s]ilicon PV has been in use for a while, and processing is very well known" but for wafers that are 10 times as thick. How well is it known for wafers this thin?
I am trying to learn something which is why I asked about the missing information. This article sounds too much like smoke and mirrors to get people to invest.
Costs are still a bit high for flywheels. Here is a quote from this article; "Costs of a fully installed flywheel UPS are about $330 per 15 seconds at one kilowatt." So to supply 1kW for a week it would cost 330*4*60*24*7= $13.3m.
Flywheels are great for instant power to level output but not yet viable for long term storage. A flywheel to give power overnight would even be $800k.
Here are a few points that the article do not mention;
1. What is the cost of the hydrogen ion particle accelerator?
2. Is the low cost only taking into account the cost of materials and power and not the amortized cost of the machine?
3. What is the efficiency of the panels? The hint that it is less due to the reflective surface but how much less is an issue. Lower cost is great but if it uses 4 times the area it might not be viable. I love this quote "Sivaram says the company has implemented an alternative anti-reflection technology that allows its solar cells to perform as well as ones made with the conventional process." If the process is not yet implemented it is only a theory and may not work.
4. How resistant are these wafers to the elements?
Yet another "release" that appears to be a technology article but really is a thinly veiled attempt at gathering investment capitol.
When anyone has to comply with multiple regulations for the same thing conflicts can and usually do occur. One regulation may focus on one aspect and give the industry a break on another aspect while a second regulation may do the exact opposite.
For example;
Province A regulation states the maximum contract length is 2 years and the maximum monthly penalty is 1/12 of the contract value. This regulation focuses on the contract length while giving a break on the cancellation penalty.
Province B regulation stated the maximum contract length be 3 years and the maximum monthly penalty be 1/36 of the contract value. This regulation focuses on the cancellation penalty while allowing longer contracts.
To comply with both regulations industry would have to have 2 year contracts with maximum monthly penalty being 1/36 of the contract value; the worst of both worlds.
Now do that for 10 provinces and see what can happen. Each province will try to balance the regulations between the needs of the people and the needs of industry. The problem comes when industry has to comply with the harshest parts of all regulations. By doing this all semblance of balance is gone.
There are two solutions to this issue;
1. A national regulation; a simple solution that allows for a single contract for anyone in Canada.
2. Separate contracts for each province; Complex as the company has to create and maintain ten different contracts. Difficult for customer service as it is easy to confuse ten similar contracts leading to misinformation and confusion. Difficult to advertise as commercials and literature would be different in each province. Considering I can watch a number of out of province channels I may be presented with a number of different contracts that are not available in my province. Confusing to anyone who moves between provinces as their contract may change to comply with local regulations.
Maybe the solution to this issue is to change the CRTC to be more responsive to the people's needs rather than create ten different regulations.
Both
Regardless of the material, suspending 4 tons doesn't sound so impossible.
I think that you need to read the article again The only place where 4 tons is mentioned is in "a levitating force of about 4 tons per meter of cable length". That is how much force the superconducting wires are repelling each other and has nothing to do with the force on the tethers. Note that the wiki article state "how often". That means it will happen if the tether is under tension. The only variable is how often the tethers need to be replaced.
I never said replacing a tether would be difficult but It would take time. If you are spending more time replacing tethers that launching you are using a lot of money.
There isn't any extra energy involved in going faster when you're in a vacuum
Have you never seen the equation F=MA. Force = mass* acceleration. One of the fastest maglev trains today, the Shaghai maglev train, accelerates at .25G. The article is talking about accelerating at 3G. That is over 10 times the train's acceleration. Also the vacuum is not there due to resistance but to prevent a solid wall of air from forming in the tube as it has nowhere to go.
So it is fine with you that bullies move on to someone else why may not be as big as you or as thick skinned as you. They will eventually find someone smaller and weaker than them to pick on. Bullies will find a target no matter what.
As for fighting back? Difficult when the bullies outweighs you by 50%. The "bullies don't want a fight" is a generalization and not always true. Unless one can put the bully in the hospital some just keep coming back and with friends this time. I had a friend who knew karate. One on one he was unbeatable. The bullies just waited and ganged up on him from ambush. It became a game to see how may times they could beat the crap out of him in one day. Some bullies are cowards others like the challenge.
Thick skin? It is impossible not to react to punches, kicks, etc. When one has been kicked in the leg one will limp and that is all the gratification some bullies need.
It needs to be socially unacceptable to stand around a laugh while someone gets bullied. That is the only way things are going to change.
It looks like the "murder squad" missed a couple of details.
Tethers; The article says that UHMWPE will be fine for the tethers. There is one aspect of UHMWPE that makes it completely unsuitable for those tethers; it is called creep. As long as the tethers are under tension UHMWPE will permanently deform getting longer and longer. At some point they will get thin enough to break. This would mean they would have to be replaced on a regular basis. How often is a factor of tension and heat. It may be that the down time will be so great that there will be no up time and replacing a 20 kM cable is no easy task. This would also mean that every line would have to have a massive tensioner to continually take up the extra slack.
Linear Accelerator;
I just love this quote "Maglev passenger trains have carried passengers at nearly 600 kilometers per hour (373 mph) - spacecraft have to be some 50 times faster, but the physics and much of the engineering is the same." One can't just take some numbers, multiply by 50 and assume they will work. That is like saying that we can make a 100 story building so making a 5000 story building would be easy as the "physics and much of the engineering is the same".There is already a problem with going a bit faster that what we do now. There is so much energy in the coils that sparks are forming that are welding the shuttle to the rails. Try to go 50 time that and you have much bigger issues.
The "murder squad" needs to take a closer look.
I would like to see the entire experiment rather than an incomplete summary. here are a few questions.
1. How long was this effect present?
2. What was the temperature of the LED as the power was decreased?
3. Was the same effect there if the power was started at 0V and slowly increased?
If it only was present for short periods while the power was decreased the effect might even be a capacitance release of power stored in the LED. In the lower efficiency phase electrons may be stored in the LED and released as the power gets lower.
Threatening speech is not and never has been protected speech. It is called assault, as apposed to assault and batter when someone actually gets touched physically.
"I hate the president and I am going to shoot him" is not protected speech as it is a direct threat."I hate the president; lets get together and kill hims" is not protected speech as it is conspiracy to commit murder. "I hate the president because he has sex with little boys" is not protected speech because it is slander. There are many forms of speech that are not protected.
So because you survived and did not commit suicide like many children are doing bullying is OK? Also, you lived in a different world that today's kids. They have so many ways to keep connected. One tweet and everyone in the school knows about it. One Facebook post of an embarrassing picture never goes away. Suicide is a rising issue with children these days. Bullies have no sense of how much it hurts to be the target and the targets are in so much pain that they give up. Bullies 20 years ago are much different than they are today.
I have been in many fights all through school. Did it help? NO; they just got more and attacked me again. This crap about "grow a set" comes straight from bullies and wana be bullies. Sure there are cases where fighting back sometimes works. There are many more cases where fighting back just escalates the violence until someone dies.
Smoking is a personal thing. It does not cause fear, pain and anxiety in innocent kids who just want to go to school and learn. Making a parallel between the two is just stupid.
So i guess you want her to have to go to youth court of something that is small now but could grow very quickly.
And then they get more friend and blindside your kid and put your kid in the hospital or the morgue. Violence only creates more violence and when it is a kid it can be deadly.
Nowhere in the article was there a complete quote; there was only single words. There have been a number of posts here that assume all she said was "I hate you". It is not clear from article that those were the word she used. maybe they were stronger like "I hate him because he was mean to me and he should have the crap beaten out of him". This is yet another article with enough detail to get the "free speech" brigade up in arms without giving enough information to make a logical conclusion about the issue.
There are many schools that "regulate and monitor" speech off school property. Those kids who use bullying speech off school grounds are the same ones who use physical bullying on campus. A target can avoid bullying off campus but when they have to be in the same hallways, change rooms and classrooms as their bullies it becomes impossible. Freedom of speech does not mean freedom to threaten or bully. Would you rather the school handle it or the youth court system? Perhaps if the school did it a bully will learn before he/she get a juvenile record. The juvenile court system is burdened enough as it is without having to deal with issues that could be handled in a much simpler way.
To those who think that anti-bullying campaigns are "nanny brigade" I say you have never been bullied. Personally I got beat up by the entire soccer team I was on because a few bullies started it. Stand up for yourself does not work when it is five to one. You have never had to walk down a hall when you never know when you will be body checked into a locker, have your books slapped out of your hands, be elbowed in the head, etc. Bullies are smart they know where the teachers are and will not be seen.
So the robot can run in a straight line on a perfectly smooth surface with perfect traction; cool but it has a long way to go. Wait till one of those spikes it call feet digs in or slides on some gravel. Show me when you can do this outside in real terrain.
While thin models contribute to some eating disorders like bulimia they are not the main contributor to anorexia. The issue with anorexia is the sufferer's delusional view on how thin they are. I have seen a couple of anorexic models but most are thin and healthy. Most anorexics see themselves a fatter that their goal no matter what their weight is. Even when their pictures and weight are compared against models who are heavier then them anorexics still believe that the model is thinner. Even if thin models are banned there will still be anorexics who view themselves as fatter. That is why it is a disorder as it is a problem with perception and not weight.
I found it and the list is appauling; ,Cardiovascular Disease , Coronary Heart Disease , Obesity , Asthma, COPD, Cerebrovascular Disease , Heart Failure, Peripheral Vascular Disease, Chronic Kidney Disease.
Hypertension, Peptic Ulcer Disease, Diabetes
They sure missed a few biggies;
Cancer, depression, liver disease.
All of these diseases would cause in increase in the use of sleeping pills due to pain.
The comparison is done using "specific disease classes". It does not rule out an unknown or undiagnosed illness in the patients that are causing them to use, misuse or abuse sleeping pills. The statistics can only be adjusted for known diagnosed illnesses.
It also does not deal with the issue of people who use sleeping pills responsably; ie not often and only for a couple of nights at a time. Perhaps it is the chronic pill poppers whi are dieing and maybe there is an underlying reason for the insomnia that is causeing the death.
This is a bad study as they do not track any of the following (all of which even a layman can see would have an impact);
Perscribed dose,
Frequency
Actual dose
Effectiveness of dose
There is no way of knowing if patients are not perscribed dose A, Taking 3X dose A, not sleeping and doing this for months on end. It is easy to see that is class of people may be at risk but the study does not track it.
It mentions "suplimental table 7) but I can not seem to find it.