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Comments

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Google Wants Patent On Splitting Restaurant Bills

Jeff1946 Honesty (196 comments)

Often at business meetings we would go out to dinner. Usually when the bill came we would have everyone chip in including tip the amount of money they felt they owed. Some folks had drinks, wine with dinner, and desert. Others may have had only a salad. It was a good judge of character to see who was honest about it. Since this is Slashdot I should mention that we were scientists and engineers so we could do the math. Most the time we would end up with a few extra dollars which would just go for a bigger tip. Occasionally we would be short, and someone would have to fess up about not putting enough in. Good way to see who is trustworthy.

about a year ago
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Uber Tip-Skimming Allegations Could Spark National Class Action

Jeff1946 minor payments -- give to the govt (167 comments)

For small payments to many people, split the money between the law firm and the govt. in a reasonable manner. Saves a lot of admin costs and we all as tax payers benefit.

about a year ago
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How Engineers and Scientists Cluster In the U.S.

Jeff1946 Federal Funding (79 comments)

Federal R&D funding agencies often have to justify why certain states get a disproportional amount of their funding. Information like this can be used to show why some states get a lot more federal funding than others. About 20 years ago I looked at DOD basic research funding per capita. As I recall Mass. got about $50 per person vs. 50 cents for Maine. NSF has a program called EPSCOR to set aside funding just for the have not states.

1 year,2 days
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Four Month Mars Food Study Wraps Up

Jeff1946 Zero G kills sense of taste (142 comments)

Astronauts have told me that foods have much less taste in space due to fluids increasing in your head. Therefore they like to put lots of hot sauce on things. One worry of course was that a drop of hot sauce would float away and get inhaled. They do particularly like sweets. Thus taste testing on Earth is not too relevant to space.

1 year,13 days
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Why Iron Dome Might Only Work For Israel

Jeff1946 Re:one other place (377 comments)

each rocket costs about $50k, not so good for antiartillery

about 2 years ago
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Surfcast Sues Microsoft Over Tile Patent

Jeff1946 Must be prior art (255 comments)

Just reading the prior patents cited by this patent, I can't understand why this isn't prior art or so obvious from prior art that it doesn't warrant patenting. It seems like the patent examiners aren't will to reject stuff like this instead of letting it get fought in the courts. If our leaders truly want to help small business then they need to end crap like this and make patent examiners do their job.

about 2 years ago
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Explosive Detecting Devices Face Off With Bomb Dogs

Jeff1946 Better than a dog? (115 comments)

A few years ago I went to a talk by an expert on explosives detection. He said, "if someone tells you they can detect explosive better than a dog, don't believe them, because we don't really know how well dogs can detect explosives."

about 2 years ago
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DNA Analysis Suggests Humans Interbred With Denisovans

Jeff1946 Amazing Progress (157 comments)

To think the discovery of the structure of DNA is only 60 years old. I believe James Watson is still alive. Sort of like the first moon landing was only 66 years after the first manned powered flight. Or the progress from the first transistor to the modern laptop that has five plus billion of them. Anyone care to give some other examples?

about 2 years ago
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Promising New Drug May Cure Malaria

Jeff1946 Africa's population less the India's (190 comments)

If you are concerned about population consider India, more people than Africa and 1/15 the area.

about 2 years ago
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Record Setting 500 Trillion-Watt Laser Shot Achieved

Jeff1946 Depends on your perspective (252 comments)

This is impressive, of course another way to state it would be: it delivers the energy of one laptop battery in one pulse. One must keep in mind the difference between energy and power.

more than 2 years ago
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Chicken Vaccines Combine To Produce Deadly Virus

Jeff1946 Same mechanism does (178 comments)

It is the close proximity of pigs, ducks, and people on Chinese farms that is a major source of flu virus mutations.

more than 2 years ago
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Sea Level Rise Can't Be Stopped

Jeff1946 Bad news unless you are in North Carolina (521 comments)

It will be ok in North Carolina since their legislature said you can only use linear extrapolations of sea level rise to plan building in coastal areas. Guess they didn't get beyond simple algebra in school (no quadratic equations etc).

more than 2 years ago
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Facebook Co-Founder Saverin Gives Up U.S. Citizenship Before IPO

Jeff1946 This works if shares go up after IPO (911 comments)

I looked up Singapore individual tax rates. Max out at 20% and 0% on capital gains. Looks like a good deal for him. I assume Calif will get some tax out of him too before he leaves. I assume he must have another citizenship already. Notice Singpore requires two years residency before you can be a citizen. Of course maybe there is a billonaire's exception.

more than 2 years ago
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Double-Helix Model of DNA Paper Published 59 Years Ago

Jeff1946 Wonderful understatement (112 comments)

Near the end of the paper is this wonderful understatement: "It has not escaped our notice that the specific pairing we have postulated immediately suggests a possible copying mechanism for the genetic material."

more than 2 years ago
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Particle-Wave Duality Demonstrated With Largest Molecules Yet

Jeff1946 Frost poem (107 comments)

The dual slit experiment reminds me of Frost's poem, "The Road not Taken." Even though you take a fork in the road you will know you could have taken the other road and wonder what would have happened if I took the other road. If the path was blocked then you wouldn't wonder about it.

more than 2 years ago
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Reversing the Loss of Science and Engineering Careers

Jeff1946 Re:Engineering shortage? (375 comments)

As a Phd chemist, I believe the hardest major is chemical engineering. Not only do you need to study chemistry but also master subjects like heat and mass transfer.

more than 2 years ago
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Aging Eyes Blamed For Seniors' Health Woes

Jeff1946 Switch to LED light bulbs (149 comments)

White leds are actually blue leds with a phosphor to down convert some of the blue to yellow and red. If you look at the spectrum of white leds (go the Cree web site) you will see there is a peak in the blue part of the spectrum, particularly with the "cooler white" versions which should be helpful as a daytime light for folks who have a problem with their circadian rhythms.

more than 2 years ago
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Optimizing Your Caffeine Intake With an App

Jeff1946 Don't need app, just spreadsheet (134 comments)

I looked up info on caffeine. Takes about one hour to go into your system and it has about a 5 hour half life. I put this into spreadsheet and found that a simple rule is drink x amount of coffee to start the day then 1/2 x in three hours and another 1/2 x in three more hours. This will keep your caffeine level pretty constant and it will decay to about 15% of x by the time you go to sleep. There is quite a bit of variation with different people so this is only a starting point.

more than 2 years ago
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President By Day, High-Tech Headhunter By Night

Jeff1946 Apples to Oranges (494 comments)

What job has a salary range of 60,000 to 150,000? Look at the Federal Govt pay scale for the DFW area, http://www.opm.gov/oca/12tables/pdf/DFW.pdf Note, you would see that a entry level engineer (no adv degree) is a GS-9 about 55,000 whereas a senior level manager, GS-15, pay tops out at about 150,000. Personally I doubt that a senior level manager could do the tasks assigned to the entry level engineer any better than the new hire, except of course design powerpoint slides. In really, the important senior level skills are cost, time and personnel management Not the same job at all.

more than 2 years ago

Submissions

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Jeff1946 Jeff1946 writes  |  more than 7 years ago

Jeff1946 writes "One of the science fair entries I judged this week was on the use of CDs to archive data and the expected lifetime. The students did accelerated lifetime testing at 80C to determine the failure rate of the cyanine dye on which is written the data. They didn't have enough time at 80C to detect any failures. Of more interest to me and /. folks is conversations they had with people at NIST and the Library of Congress. The students learned that CDs lifetimes have greatly improved due to metal stabilizers being added to the dye and it is now reasonible to expect no degradation for at least 50 years if the CD is kept at room temperature away from bright light. They also were told that DVD-Rs are much more prone to degradation. Another tidbit they learned was the least reliable part of a CD is near the outer edge due to the fact that the dye is spun onto the CD and may not coat it as well there. My take away from this is that is probably a good idea to copy any older CDs with valuable data to new ones."

Journals

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Life of CDs for archiving data

Jeff1946 Jeff1946 writes  |  more than 7 years ago One of the science fair entries I judged today was on the use of CDs to archive data and the expected lifetime. The students did accelerated lifetime testing at 80C to determine the failure rate of the cyanine dye on which is written the data. They didn't have enough time at 80C to detect any failures. Of more interest to me and /. folks is conversations they had with people at NIST and the Library of Congress. The students learned that CDs lifetimes have greatly improved due to metal stabilizers being added to the dye and it is now reasonible to expect no degradation for at least 50 years if the CD is kept at room temperature away from bright light. They also were told that DVD-Rs are much more prone to degradation. Another tidbit they learned was the least reliable part of a CD is near the outer edge due to the fact that the dye is spun onto the CD and may not coat it as well there. My take away from this is that is probably a good idea to copy any older CDs with valuable data to new ones.

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