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User: Roger+W+Moore

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  1. Pressure Matters but probably not Much on Oregon Testing Pay-Per-Mile Driving Fee To Replace Gas Tax · · Score: 1

    Assuming a reasonable pressure (no trains with flanged wheels trying to drive down the highway) then the damage comes from axle load and not pressure for standard road building materials.

    Yes but the strength of materials is usually measured by elastic modulus which has the same dimensions as pressure. Hence, although a bike will elastically deform a small area of the surface with the pressure it applies, it will deform it more than a car with lower pressure tyres. However I doubt this is where the damage comes from but rather from the motion of the vehicle. The dynamic load of a car travelling at speed will be many, many times greater than a cyclist who is less massive and slower moving. Similarly for lorry it will be many times larger still than a car. We would need an engineer to confirm but I expect that this is where the damage comes from since the dynamic load can be many times larger than the static one.

  2. Non-residents on Oregon Testing Pay-Per-Mile Driving Fee To Replace Gas Tax · · Score: 1

    In addition it will be interesting to hear how they plan to tax non-residents, including those of us from Canada. The nice thing with taxing petrol is that you are likely to fill up somewhere in Oregon if you are driving through. There is no extra delay and most people passing through will end up paying no matter where they live. With a mileage tax system are they going to stop you at the border and take a reading and a second when you leave? If not then suddenly non-residents will be paying nothing unfairly increasing the burden on those who live there.

  3. Texting Maths on Microsoft To Teachers: Using Pens and Paper Not Fair To Students · · Score: 5, Insightful

    Actually, ironically, one of the best reasons to use pen and paper is for maths. It's rather hard to express matrices, vectors, integrals etc. in a text message. You need LaTeX and a graphical display and its a lot slower than pen and paper. An equation editor is even slower.

  4. Re:One Daft Question on How We'll Someday Be Able To See Past the Cosmic Microwave Background · · Score: 1

    In other words, we see further into the past by much more than a single year for every elapsed year

    No, the universe was opaque until the plasma cooled and released what is now the CMB. We cannot see further back in time with light. Hence the only reason we can see further into the past each year is because that event (the universe becoming transparent) is getting further away from the present. Currently the amount of that event we can see is increasing - a trend which will eventually reverse due to dark energy - but it all occurred ~380k years after the Big Bang. So the only way we see further back is to let the present get further away or use something other than light like neutrinos.

  5. One Daft Question on How We'll Someday Be Able To See Past the Cosmic Microwave Background · · Score: 1

    Does it mean that, as time goes on, we're going to be able to see farther back in time and space?

    Obviously the answer is yes because, as time goes on, the period at which the CMB was emitted moves further into the past so obviously we are seeing "further back in time" but only at the rate of one year further per year past (on average). Since the universe is also expanding we are also looking further. This is about as insightful as pointing out that as time goes by I can remember events further back in time.

  6. The other side of the coin on FCC May Stop 911 Access For NSI Phones · · Score: 1

    Easy to say until you or someone you know and love are the person being denied access to 911 because of this rule change.

    The question you also need to ask is how many people are dying because of the delays caused by responding to fraudulent emergency calls? I also fail to see how anyone is being 'denied' access to emergency calls: this is a choice they make when they purchase the mobile. If they choose to purchase a communication device without 911 access this is no different from those of us who make the choice not to own a mobile at all. I would hardly say that I have been denied access to 911 simply because I choose not to own a mobile and, if it were true, isn't that my choice to make?

  7. Re:Standardized Testing on Bill Gates Still Trying To Buy Some Common Core Testing Love · · Score: 1

    Standardized testing has been implemented in all East Asian countries for decades. You could check the result of our education systems. They're complete failures...

    Standardized testing has been used in the UK since at least the 1950's and yet I would argue that it has been a great success there although there has been a problem of dropping standards in the past 10-20 years. As someone who has taught students from Asia the problem, as I see it, is far more to do with the style of education - rote learning - than with standardized testing. This does not prepare people well for science at the university level where you have to be curious, ask questions and think around problems. You cannot succeed by memorizing facts.

  8. Re:Standardized Testing on Bill Gates Still Trying To Buy Some Common Core Testing Love · · Score: 1

    Standardized testing is quite recent. Think of any great idea, any great civilization, any great thinker; none is steeped in standardized testing.

    Standardized testing arose about the same times as public, compulsory education. The problem it addresses is the need for measuring students against a fixed, known standard. Before there were schools everywhere the reputation of the educational establishment or individual was used to judge the standard because there were few enough institutes/people that you could know the standards of a good fraction of institutes.

    Today you are likely unaware the reputation and standards of schools beyond the boundaries of your local town and probably not even all of them if you live in a city. What standardized testing provides is a fixed, known standard that you can know and be aware of regardless of where a student went to school. Without a known standard - however you achieve it - grades are worthless as a certification of knowledge.

  9. Standardized Testing on Bill Gates Still Trying To Buy Some Common Core Testing Love · · Score: 4, Insightful

    Thinking about standardized testing reminds me of the Churchill quote: "Democracy is the worst form of government except for all the others.". Standardized testing has its problems but these are no where near as significant as the problems with everything else which has been tried.

  10. Republican fever on World Health Organization Has New Rules For Avoiding Offensive Names · · Score: 0

    Ebola gets its name from a River in the Republic of Congo

    Well it could have been far given a far more offensive then. Imagine if they had called it Republican fever.

  11. Amplitude not Height on Subsurface Ocean Waves Can Be More Than 500 Meters High · · Score: 5, Informative

    I think you mean that their amplitude can be as much as 500m. For a start these are not surface waves so they do not raise the water surface. Additionally, although the article does not really specify it, I would expect that they are actually far more longitudinal than transverse in nature and so the displacement will be almost entirely in the same direction of the wave motion i.e. horizontal. Fluids generally tend to be very poor transmitters of transverse waves because they cannot support a shear stress.

  12. Re:Hmmm ... on Defense Distributed Sues State Department Over 3-D Gun Censorship · · Score: 1

    But the question (for which I don't pose an answer) is "do we accept there are valid limitations on free speech, and if so what defines that?"

    Really what we mean by free speech is that we should be free to communicate any ideas or feelings we have without restriction no matter what they are. Where we should draw the line is with deliberate lies which will likely result in physical harm or loss of property e.g. shouting fire in a crowded theatre when you know that there is no fire, lying about a financial scheme to persuade people to invest etc. Here though it is not the speech which is illegal but rather the intent of the person speaking.

  13. Re:One Criterion Missing on No, NASA Did Not Accidentally Invent Warp Drive · · Score: 1

    New science is not always required if something odd is noticed.

    True but this is a little different from your example. There is no fundamental law of physics saying that you cannot build an instrument large enough to observe distant planets. In the absence of such a restriction building that instrument is down to human ingenuity. However there is a fundamental law of physics which says that momentum is conserved.

    As a result this force is either due to some interaction with the surroundings that the experiment has forgotten to account for or is due to new physics in the form of new particles/interactions or violation of conservation of momentum - which is an extremely fundamental law of physics. There really are no "loopholes" to squeeze through.

    My personal feeling is that it will turn out to be some effect which they forgot to account for although I cannot help but hope that it turns out to be something far more interesting...which is why it is so easy to fool ourselves when doing experiments.

  14. A lot more than one on The Medical Bill Mystery · · Score: 1

    Yet I bet nearly every one of us has dealt with at least one error or oversight that benefits the company

    I lived for several years in the US just over a decade ago when MCI was a long distance phone company. They made so many mistakes that it became a joke: there was at least one error every 3 months and it was always in their favour. Even the one time they accidentally credited my bill with someone else's far larger payment they tried to charge me a late payment fee when they corrected it several months later despite acknowledging that I had informed them of the mistake at the time it occurred!

    If you contrast this with Canada I don't think I have ever had an error on a bill since I moved here 12 years ago. Even in the UK, where I was moving around more frequently, the only time I had trouble was with either the setup or termination of services which was more understandable. As a result it is hard to believe that the massive rate of mistakes I observed in the US (and not just MCI, although they were by far the worst) is entirely due to incompetence and it seems far, far more likely that it is a deliberate policy of some companies to overcharge and then hope that you cannot be bothered to complain.

  15. Need more data on Two Programmers Expose Dysfunction and Abuse In the Seattle Police Department · · Score: 5, Insightful

    The only evidence uncovered is that the PD has a robust system for reporting and investigating claims.

    That's not quite true - the evidence suggests only that they have a robust system for reporting and recording claims. I've not seen any evidence to suggest that they robustly investigate them and the OP claims that there is evidence of them using unnecessary force and racist language without repercussion which, if substantiated, would be clear evidence of very poor investigation.

    I completely agree that having a large fraction of claims refused is not evidence that the system is not working. It does suggest that the system should be investigated to understand why there are such a lot of dismissed complaints because either cops are having to endure a lot of frivolous discipline cases or they are getting away with serious misconduct. Either possibility is bad but the statistics provided do not distinguish between the two cases.

  16. Re:One Criterion Missing on No, NASA Did Not Accidentally Invent Warp Drive · · Score: 5, Informative

    No. These tests prove that the device is real, and that it produces force.

    Actually that is NOT what these tests show. They show that someone has done an experiment which, using their apparatus, returns readings consistent with a micro-newton force. What the experiment has NOT shown is that this is due to some new, as yet unexplained, physics.

    There are a myriad of other, far more mundane, possibilities to generate such results before anyone will seriously start believing in new physics as an explanation. For example did they account for the radiation emitted bouncing back and forth between the apparatus and the vacuum chamber walls?

    After the results have been confirmed independently and all the possibilities people can come up with disproven then you have an interesting result which is unexplained. At this point there are still two possibilities: either new physics OR an effect so subtle that nobody has thought of it. The only way to prove new physics is therefore to come up with a theoretical explanation which allows testing.

    Whether or not you agree with this this is how science works: there are simply too many ways that a precision experiment like this can be fooled and history is littered with examples of this happening e.g. faster than light neutrinos, gravitational waves in the cosmic microwave background, cold fusion etc. The results have to be confirmed and stand several years of scrutiny before people will start to believe that they are interesting. Even when that happens to get people convinced that there is new physics here you need a model for that new physics that makes predictions which can be confirmed.

  17. One Criterion Missing on No, NASA Did Not Accidentally Invent Warp Drive · · Score: 4, Insightful

    Actually this is the one criterion missing from the list of "what would it take to convince you that it is real": a viable theory as to how the drive works which makes a prediction that can be tested by another experiment. If this is a real effect then we need a theoretical framework which can be used to explain and predict the size of the effect under different conditions which can then be tested.

    This is how the solar neutrino problem was solved. For decades experiments measuring the flux of solar neutrinos had come up short by a factor of 1/3 to 1/2 of the expected value. Initially people thought the experiments were somehow wrong, then focus switched to the solar models predicting the flux but these were confirmed as correct so ultimately nobody had a clue as to why there was discrepancy. People were split between inaccurate experiments, inaccurate prediction or new physics. The problem was solved only when the model which theorists had proposed as a possible solution - that neutrinos changed their flavour as they move through space - was tested by the SNO experiment which measured both the total neutrino flux and the electron neutrino flux separately.

    You need both theory and experiment to agree to get understanding and without that clear understanding I would not expect the 'warp drive' effect to be resolved. No matter how much you repeat and verify the experiment there will always be questions raised about some effect which is not accounted for (assuming the effect remains so small). After a few decades you might get to the point where people will admit that the effect is not understood but even then many will ascribe it to some subtle experimental effect rather than new physics. The only way you will change minds is by having a new theory whose predictions are verified by further experiments.

  18. Renewable and Nuclear Power on New Study Suggests Flying Is Greener Than Driving · · Score: 4, Insightful

    I have the same gripe with calling Teslas "zero emission vehicles". They are not.

    True, but unlike petrol driven cars they could be. Both renewable and nuclear power power are zero carbon methods of generating power and while renewable has issues with cost, limited locations and variability if it were supplemented by nuclear we could significantly reduce greenhouse gas emissions. In fact if you charge your Tesla in France then 75% of that power comes from nuclear so you might not be zero emission but you will be getting close.

  19. Who decides what is "super" on The Future Deconstruction of the K-12 Teacher · · Score: 2

    Those roles can't be done by some national "super teacher."

    The other problem is who decides the criteria for being "super"? Different people find different teachers effective. For example I know that Feynman was regarded by most as a "super teacher" but I hated his books and found his explanations needlessly complicated and far more confusing than most other textbooks. In short I found him a terrible teacher. I realize I'm in the minority with that but the point is that not everyone will agree on who a super teacher is because different people learn differently. This is why you need to learn from a variety of teachers and not just the most popular.

  20. Deccan Traps on Yellowstone Supervolcano Even Bigger Than We Realized · · Score: 2

    A super volcano could be extinction event if it is big enough.

    Not unless it is a lot bigger. The one that occurred around the time of the extinction of the Dinosaurs gave rise to the Deccan Traps.

    To put the scale of this extinction-level eruption in context the article mentions that the new, larger chamber under Yellowstone contains enough magma to fill the Grand Canyon which according to here is 4,170 cubic kilometres. The Deccan trap eruptions produced 512,000 cubic kilometres over 30k years. A Yellowstone eruption would certainly cause a lot of devastation over a large area of North America but its peanuts compared to an extinction level event.

  21. Cut the rhetoric, look at the evidence on Study Confirms No Link Between MMR Vaccine and Autism · · Score: 0

    Contrary to your argument, those who receive the chickenpox vaccine seem to have proven to have a lower risk of shingles [cdc.gov] (scroll to "Risk Factors").

    ...and yet the vaccine prevents those people who already had Chicken Pox as a child being re-exposed to it the virus later in life which has been shown to prevent shingles in adults.

    Now I could accuse you of spreading lies and deceit but really that would be behaving exactly like the anti-vaxxers: adopting a preconceived notion, ignoring all scientific evidence to the contrary and getting mad at anyone who disagrees. So how about we adopt a more scientific stance which is that for the specific case of the Chicken Pox vaccine there is no clear evidence that it is a net benefit to individuals or society over just catching the disease as a child and recovering? The risk of the vaccine is not measurably less than the risk of the disease and there are clear questions about the net affect of susceptibility of adults to shingles: it might be good or it might be bad but we really don't have a clue either way.

    My position is that if there is no clear evidence for any benefit from a medical procedure then you don't do it. If that changes with more studies and they can show that there is a clear benefit then great I'd be 100% behind it. In the meantime I would argue that it is unethical to coerce people into undergoing a medical procedure for which there is no evidence of a net benefit to them or to society. Worse, because in this one specific case, the evidence is lacking you give the anti-vaxxers ammunition which they can use to shoot at the cases where the vaccine is incredibly beneficial and absolutely should be taken by everyone.

  22. ...and another reason on Study Confirms No Link Between MMR Vaccine and Autism · · Score: 1

    It also turns out there is another reason this vaccine is bad. Older adults in contact with children who have chicken pox get a boost to their immune response to the vaccine which helps prevents shingles. The vaccine prevents this from happening: see this.

  23. Re:Agreed but there is a point on Study Confirms No Link Between MMR Vaccine and Autism · · Score: 1

    So, go see a doctor at least four times during my adult life?

    No, go an see a doctor fours times at 20 year intervals AND remember to ask for this shot because unless you go to the same doctor throughout your entire life it is unlikely that they will.

  24. Re:Agreed but there is a point on Study Confirms No Link Between MMR Vaccine and Autism · · Score: 1

    You speak as though getting chickenpox will prevent shingles which it won't

    Correct - once you have the virus you never lose it and shingles can emerge if something compromises your immune system. However if you have the vaccine and then the immunity wears off and you are exposed to the virus again then you can get shingles even without a compromised immune system.

  25. Re:Agreed but there is a point on Study Confirms No Link Between MMR Vaccine and Autism · · Score: 1

    Wrong to an extreme. Shingles is a resurgence of the virus which causes chicken pox. Once you get chicken pox, the virus is dormant in your body, your immune system continues to fight it. When your immune system is weakened, you get shingles.

    Umm...so how is it wrong to say that Shingles and Chicken Pox are the same disease given that they are caused by the same virus? All you stated I already knew. Indeed Shingles often emerges when the immune system is compromised.

    However if you had the vaccine and so never caught Chicken Pox. Then your immunity wears off (which does not happen with Chicken Pox since you have the virus inside you) then when you then get exposed to the virus again you will have no immunity and so end up with Shingles EVEN IF your immune system is fully operational.