-
Posts
18315 -
Joined
-
Last visited
-
Days Won
104
Content Type
Profiles
Forums
Events
Everything posted by studiot
-
Just to clear something up. The number itself is the same whatever "base" you use to represent it. It is the representation in each different base that will be different. It is often proposed that primitive Man started off with base 10 because he had 10 fingers and counted on them. This proposal actually runs counter to archeological evidence which suggests that different primitive Men tried different base systems in different places and finally more sophisticated Man settled on the 10 base because he had 10 fingers and still counted on them. Also you have introduced physical units; these are quite separate from the numbers themselves. The volume of my glass of beer is the same whether I measure in in pints, litres, quarts, hogsheads or US gallons. But the number representation in each unit system. This is perhaps where you should be thinking twice.
-
Let's see some evidence for your opening assertions please. It is true that if most studies are, in fact, conducted only at fertility clinics - something I very much doubt as that would present mamoth difficulties in finding control groups and properly analysing the data and in the final analysis it could only be valid for people at fertility clinics, whatever their fertility status, selection bias would be a big problem and many studies would fall below the bar of statistical validity.
-
First you need to know that 0 and 1 are fractions themselves ! [math]0 = \frac{0}{1}\quad and\quad 1 = \frac{1}{1}[/math] Although we don't usually write them like that. Mathematics recognises a series of 'number systems' that are nested like Russian dolls. The outer one is the most complicated and the number systems get simpler inside just as the outer doll is the biggest and the dolls get smaller inside. For number systems the more complicated (outer) system contains or includes all the simpler systems within it. The simplest system is called the natural numbers or counting numbers. 1,2,3,4,5...... There is no zero in these. Then we have the positive inetgers if we want the same thing but with a zero 0,1,2,3,4,5...... The we have both positive and negative integers ...-5,-4,-3,-2,-1,0,1,2,3,4,5...... These are all the integers. The we have the rational numbers : ratios of two integers ie fractions [math]\frac{1}{2},\frac{{25}}{{39}}etc[/math] We do not need another category for the ratios of decimal numbers since they can always be written as the ratio of two integers [math]\frac{{2.5}}{{3.138}}is\;the\;same\;as\frac{{2500}}{{3138}}[/math] Which is a number system as far as you have asked since it includes all the fractions lying between 0 and 1 that can be written. And it also answers you question about number bases. Simply it does not matter which base you choose as shown by the example of rewriting a decimal fraction as the ratio of two integers. But there are yet more important numbers that cannot be written this way. An example would be the reciprocal of the square root of 2, or the square root of 0.5. So we come to the what are called the real numbers as corresponding to our outer Russian doll, and includes all these numbers as well as all the fractional ones. I hope you can see nesting idea from this. There are yet more complicated layers of 'numbers' but I will leave it at that.
-
Does the Anti-Gravity drive as described defy the laws of physics?
studiot replied to Cosmic Yoyo's topic in Speculations
No more than 1 elephant = 1 glass of whisky. -
Two interesting devlopments today. 1) Trials of a combination/cocktail of the Astra - Zeneca (Oxford) and Russian (Sputnik) vaccines are to be held. https://www.bbc.co.uk/news/health-55273907 2) Progress on the gnetic basis for severity of covid infections. https://www.bbc.co.uk/news/health-54832563 Finally an interesting story of a Cholera vaccine pioneer https://www.bbc.co.uk/news/world-asia-india-55050012
-
Then perhaps you can answer a couple of questions for me. 1) Are you a parent and if so, what do you have to do with diapers disposable or otherwise ? 2) What sort of lighting do you use ? Candles ? kerosene lamps ? gaz lamps? tungsten electric ? flourescent electric ? LED electric ? or do you just go to bed with the sun ?
-
No I think Bartholomew is simply taking things to far to extremes. It is interesting that the hero in what I think is your character's best film started off following the Jones life philosophy, but found, as have many others in history (eg Lindisfarne) that this makes them vulnerable. I have quite a lot of sympathy for the agrarian work ethic, but it is not enough and does not suit everybody. It has been shown (https://pubmed.ncbi.nlm.nih.gov/31257940/) to be one of the most successful methods of treatment for mentally unwell people. But like those at school who suffer in sports lessons, it is actually bad for some people. Humanity is a disparate species.
-
One more thing, The authors are better at spelling than I am.
-
Question about covid vaccine trials
studiot replied to studiot's topic in Microbiology and Immunology
We know the details were uncovered for this lady. https://www.bbc.co.uk/news/blogs-trending-55179300 -
Do we really know why seasonal respiratory viruses are seasonal?
studiot replied to Apiery's topic in Medical Science
How are your bones ? -
The UK government have updated 'The Green Book' with chapter 14a which provides reliable information about Covid vaccines and vaccination proceedures. https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/941450/Greenbook_chapter_14a_v2.pdf Bote the grren book itself is a good source of information on vaccines in general. https://www.gov.uk/government/collections/immunisation-against-infectious-disease-the-green-book
-
So does this mean anything to you, if so what ? [math]aBaC{l_2}_{\left( {aq} \right)} + b{K_2}S{O_4}_{\left( {aq} \right)} \to nBaS{O_4} \downarrow + mKC{l_{\left( {aq} \right)}}[/math]
-
Since you couldn't solve them you have presumably tried ? So how far have you got ? Have you for instance got any proposed reaction equations ?
-
Crop rotation won't fix this, if the trace element is not in your particular soil in the first place. That is why I mentioned an external source. There are plenty of soils in the world that are deficient in something so won't allow certain crops to grow or grow properly. I think there are also some folks in the world who suffer particular conditions as a result.
-
thnx. Most devices these days have some sort of charge status indicator. The 500 charge/discharge rating refers to charging until that indicator says full and the recharging until that indicator says recharge. Note el cheapo replacement batteries usually have a lower life expectancy - around 350 cycles is common. Again String Junkie's advice is spot on think of your average cellphone. A simple phone will require recharging every 3 days to a week so the batery will last several years. A heavily used smartphone may run out before the end of the day many find this because they have too many apps or the machine keeps activating with wifi data roaming switched on. Such a battery may not last much beyond one year. Since some folks change their phone like I change my socks, they never see this problem. (Does the Zen Master rigout include socks ? I can't tell from the avatar). I always try to get a spare battery and a charger (these are available for most devices) at or near purchase.
-
Why straightforward ? In my opinion the headline question is pretty shallow since it assumes a binary choice of answers. Real life is not like that. What about those individuals who chose to sacrifice themselves to save others in all sorts of circumstances ? What about Kamikaze pilots ? What about the Hari Kiri of Japanese Officers ? What about those who were forced into it for whatever reason ? What about Hitler, did he jump or was he pushed and was his demise a good thing or a bad one ?
-
Final international agreement as to the height of Mt Everest and the dispute as to whether the snow on top should be included or not in the height measurement. https://www.bbc.co.uk/news/world-asia-55218443 Well done the Nepalese.
-
I see little untoward about this point view provided you are willing to allow other points of view into your fresh look. You have explained your meaning of 'energy to mass' in my opinion. It is a valid one and a shame that it could not have been achieved with out rancour. I hope you are not including me here. Talking of other points of view, I had an interesting discussion with a friend about composting. He was busy telling me how much he composts from his garden. I pointed out that I was sure he was right but only using his own garden material runs the risk of compounding and perpetuating any deficiencies present in his soil. Elements not present in his soil could never appear by recycling plants just from his garden. But if he added materials from elsewhere, say orange and abnana skins, he would be adding trace elements he might be short of.
-
Do you do and say calculations or computations ? Can you say why ? Do you consider there is any difference ?
-
So they deserve both flogging and favour and food ? They must be very deserving indeed.
-
Yes you are right some nitrogen is also required and this doesn't come directly from the air.
-
We were taught Every Garrulous Boy Deserves Flogging Good boys deserved food.
-
Just think of those folks who 'sailed for South Australia' in the late 18th and 19th centuries. Having spent some Christmasses offshore in the oilfieds and had later Christmasses dictated by the the needs of our local district hospital here, I don't have huge sympathies for those 'who must have their Christmas' just so!
-
I agree. I also agree that the battery university is a reliable site. Markus you also need to know that charging techniques are different for different types of battery. So I'm glad you mentioned Lithium-Ion. The practice of taking discharging the battery pretty fully before recharge and even taking it down to deep discharge occasionally applies to old fashioned accumulators- lead acid batteries and also to NiCads. More recent Nickel - metal hydride batteries can be safely recharged at any state of charge without detriment and can also sustain quite high rates of recharge, such as would destroy the Nicads that preceded them. More modern are the lithium ion technologies which are implemented in several ways. In particular the low current drain 'polymer' batteries are very sensitive to abuse as the charge is spread out over a large area on a very thin film. This can easily be punctured by heat or excessively fast or just excessive charging or discharging. For your digital device these are most likely to be the types meant. Power tool Li-ion batteries have a different 3D construction and are more robust so can be fast charged and supply high currents (fast discharge). So use the correct charger or charge lead if USB powered and keep within String Junkie's limits.