Technical stuff

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Re: Technical stuff

Postby Pondero » January 28th, 2018, 7:52 pm

On Jan 4th I ordered a Casio FX-CG10 PRIZM, color graphing calculator,(black) , with 65,000 colours and a 3.7 LCD screen, from Amazon (they didn't have it in stock).It arrived on Wednesday and my daughter picked it up from the Post Office at my request . I haven't seen it yet and am looking forward to it coming here with my son on Feb 6th. My daughter had to pay duty of $45 for it. (Now, whatever happened to free trade.* I don't know what the current Excise Act says about it, but if the same graphing calulator is available in Canada then I am puzzled by this duty.) It is nothing fancy.
It will do conic sections in 3D. Marvelous.
*Maybe I can blame Trump .
EDIT
Maybe my daughter is wrong and it isn't duty at all, or it is a combination of HST and duty of the duty paid value. If so the Americans shouldn't have charged me for HST on my order. Life gets more complicated as time goes on.
According to one study, the average adult has a shorter attention span (eight seconds) than a goldfish (nine seconds).
This is not surprising in today's wired , or wified world.
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Re: Technical stuff

Postby Pondero » February 9th, 2018, 11:21 am

Thee cg10 has arrived , my son brought it with him. It does what the Texas Instruments TI 83Plus does only in colour. Graphs are in colour, and there are more types of graph , some 3D pictures too on the Casio Prizm cg10. I know it is excellent to use and learn calculus and pre calculus on. It says on the calculator School Property.So that is why it was designed. That is the purpose of it.It cost me with duty (under appeal) $245 cad.
It is not the latest Casio product of this type, but as far as graphics are concerned it is perfect.
One third year calculus student in mechanical engineering said he bought it so he could see better (in color) and was angy and disappointed.He had a Texas Instruments TI 89 which was better because it could handle 20 variables in differential calculus and apparently the Cg 10 could not.
I am certainly not at that high level in mathematics and I enjoy using the Cg 10.
According to one study, the average adult has a shorter attention span (eight seconds) than a goldfish (nine seconds).
This is not surprising in today's wired , or wified world.
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Re: Technical stuff

Postby Pondero » February 14th, 2018, 11:01 am

https://www.msn.com/en-us/news/technolo ... spartanntp
I think this is false news. What do you think?
According to one study, the average adult has a shorter attention span (eight seconds) than a goldfish (nine seconds).
This is not surprising in today's wired , or wified world.
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Re: Technical stuff

Postby Lyn » February 14th, 2018, 6:21 pm

It's been reported quite widely, Pondy, doesn't seem to be fake.

https://www.newscientist.com/article/21 ... ing-photo/

https://www.sciencealert.com/photo-of-a ... hoto-prize

http://bgr.com/2018/02/14/single-atom-p ... ure-image/

Very pretty photograph and quite exciting (if you are excited by such things).
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Re: Technical stuff

Postby Pondero » February 14th, 2018, 9:18 pm

The reason I am suspicious is because the strontium atom is suspended between two electrodes 2mm apart and the strontium atom could not possibly be that big in relation to the size of the two electrodes. It must have been magnified to enable it to be seen, and previously only an electron microscope could do that job.
According to one study, the average adult has a shorter attention span (eight seconds) than a goldfish (nine seconds).
This is not surprising in today's wired , or wified world.
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Re: Technical stuff

Postby Lyn » February 14th, 2018, 9:48 pm

Well there you are then. Write in and tell them!
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Re: Technical stuff

Postby Pondero » February 15th, 2018, 12:41 am

I can't prove it, but until I get a satisfactory explanation that I can understand, until then, I have suspicions. I believe in the validity of science but the experiment must be able to be duplicated and explained. In scientific matters we have had the scandal of "hockey stick" science regarding climate change.And remember cold fusion? I saw photos of an atom taken years ago by an electron microscope.
Why do people accept everything a journal says about science or anything else these days without doubt, I don't know.
All I have to do is sit and wait, and if it really is fake news the truth will out eventually.
According to one study, the average adult has a shorter attention span (eight seconds) than a goldfish (nine seconds).
This is not surprising in today's wired , or wified world.
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Re: Technical stuff

Postby greenjack » February 15th, 2018, 10:30 am

Morning Pondero
Hope you are well!

The article may be a bit mis-leading I think. You are not actually seeing the atom but re-emitted UV light from that atom. This is likely to be amplified (as LASER is to start with) therefore what you are seeing is likely to look considerably larger than the actual atom.
We have a similar comparison within ImmunoCytoChemistry at work. Single atoms or molecules can be tagged using antibodies then amplified by adding more visible colour tags. It therefore has the effect of enlarging that target to a size visible with microscopy. Useful in tumour diagnostics these days.
Hope this helps.
Cheers
GJ
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Re: Technical stuff

Postby Pondero » February 15th, 2018, 11:01 am

You are not actually seeing the atom but re-emitted UV light from that atom


That clarifies things, Thanks.

EDIT. Welcome back Greenjack
According to one study, the average adult has a shorter attention span (eight seconds) than a goldfish (nine seconds).
This is not surprising in today's wired , or wified world.
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Re: Technical stuff

Postby Pondero » February 16th, 2018, 11:44 am

David Nadlinger* is a quantum physicist, not an engineer, but he won an engineering competition in the UK for photographing a single atom with a camera, using specialised equipment, an engineering accomplishment.
Good for him.

I have met scientists who did field work in Ottawa, they are uncomplicated souls, I found out and will speak frankly to you about any subject. Engineers I know a little about. I met one who rented our cottage two years ago, for a week. He used to be a professor of Engineering at Ryerson University, and got good grades from his students. He quit that and started his own company in the medical field. I remember only that he went to McMaster U as a student and I told him my grandson was there in civil engineering, He replied that it was a long time ago. But, he looked very young to me. Anyway, I hope he enjoyed himself for the week Up North with his wife and two children.
I admire their ability to do complicated mathematics.









*A PhD student in Physics not engineering - I think,
According to one study, the average adult has a shorter attention span (eight seconds) than a goldfish (nine seconds).
This is not surprising in today's wired , or wified world.
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