What data projection should I use for area analyses in different countries at a global scale
- Yes, SSO with-or-without 2FA makes sense from a security perspective, but not in the direction you've considered. SSO provides a way to instantly deny access to compromised credentials across all the systems that subscribe to it. So if my account is compromised on site A, the security provider can force a single password change that will impact my SSO account on all other protected sites. 2FA does not impact this one way or another.
Consider that SSO can initially be deployed without 2FA, but it can be converted by the security provider to use 2FA at a later time. This will deliver 2FA benefits to every site without those hundreds of sites having to change their codebases at all. That's a compelling argument not just in favor of 2FA, it's a benefit of outsourcing your security to a service dedicated to handling user authentication. They can make improvements to your clients' security without you needing to expend any resources.
If 2FA is even remotely an option, yes, of course you will improve security by choosing it. The only reason not to choose it today would be legacy system compatibility, and you shouldn't let that stop you from deploying it on a new system.
2FA is not a magic bullet. It's a great improvement in security, but it's not invulnerable. Nor is single factor authentication a complete failure. Many sites that don't employ 2FA haven't had a breach. :-) All that said, Account Take Overs are pretty much shut down by 2FA, so you can actively help your users protect themselves by deploying it.
Finally, circling back to your anecdotal story of "I personally have a unique password for every one of my 100 or so logins with a system that allows me to remember them", this has two significant problems that you haven't acknowledged. First, you are much better trained and far more skilled than 99% of common users - skills and techniques you may think are easy are far beyond the reach of virtually half the population of the planet. This solution does not and cannot scale to benefit all users. SSO may be a compromise that introduces additional (and significant) risks, but it's a compromise that will benefit the full spectrum of the public.
Next, be aware that if a threat actor is targeting you specifically (different than someone driftnet trawling with passwords stolen from a large breach), and compromises your password on three different low-value sites, he may acquire enough data points to recognize the pattern underlying your password generating algorithm. From there, he can try logging on following the same algorithm to derive potential passwords for you at high value sites, such as mybank.com, firstbank.com, lastbank.com, myretirementaccount.com, etc.
We see things because some light gets bounced off them, and this "bounced" light is due to electrons jumping from higher energy states to lower energy states.
That is not the way we "see" things. Photons getting absorbed and re-emitted is not the most probable interaction of photons with atoms, particularly of visible light. Photons interact with the electric and magnetic fields of atoms (collectively) and scatter elastically, thus not changing frequency/color, most of the time. Excitation and re-emission can happen if the atom in question has energy levels at that frequency of visible light, and is called fluorescence . Usually this is not so, and the photons hitting a surface made up of atoms reflect the shape of the solid and we "see" when some of those photons fall in our eyes.
So is it really possible to see a single atom using visible light?
Now for single atoms and visible light this is not possible
No one has ever seen an atom. The wavelength of visible light is more than 1000 times bigger than an atom, so light can not be used to see an atom.
There are different ways of "seeing" other than with visible light, using interactions of atoms and mathematical models this has been done, like blind people with touch:
Scanning Tunneling Microscopes work by moving a probe tip over a surface we want to image. The probe tip is an extremely sharp - just one or two atoms at its point. There is a small electric voltage on the probe tip and depending on the height of different parts of the surface, more or less current will flow from the tip to the surface. By noting the changes in current we can recreate an image of the surface at the atomic level.
They have "seen" a single hydrogen atom
Physicists in the US claim to have used a transmission electron microscope (TEM) to see a single hydrogen atom – the first time that a TEM has been used to image such a light atom. The breakthrough was made by supporting the atom on graphene — a sheet of carbon just one atom thick. The team has also been able to watch hydrocarbon chains move across the graphene surface, suggesting that the technique could be used to study the dynamics of biological molecules.
Edit after comment.
Another way of seeing is in using fluorescence of molecules , as in fluorescence microscopes.
The specimen is illuminated with light of a specific wavelength (or wavelengths) which is absorbed by the fluorophores, causing them to emit light of longer wavelengths (i.e., of a different color than the absorbed light). The illumination light is separated from the much weaker emitted fluorescence through the use of a spectral emission filter. Typical components of a fluorescence microscope are a light source (xenon arc lamp or mercury-vapor lamp are common; more advanced forms are high-power LEDs and lasers), the excitation filter, the dichroic mirror (or dichroic beamsplitter), and the emission filter (see figure below). The filters and the dichroic are chosen to match the spectral excitation and emission characteristics of the fluorophore used to label the specimen.2 In this manner, the distribution of a single fluorophore (color) is imaged at a time. Multi-color images of several types of fluorophores must be composed by combining several single-color images.
They have seen single molecules with this method.
Update 2018, thanks to comment by Mr.WorshipMe
A single atom is visible to the naked eye in this stunning photo
...
Two metal electrodes, two millimetres apart, held the strontium almost motionless in a strong electric field as it was illuminated with a blue-violet-coloured laser.
Note that the atom is visible in the photo to the naked eye , not looking at the gap directly, where the atom is suspended. This is the simplest proxy method at the moment of getting a signal of a single atom, with visible light.
BTW the article propagates the misinformation that we see by light absorbed and re-emitted. We see by light scattered elastically off the objects. Absorbed and re-emitted light looses phase correlations, and the reflected image would be lost; in the case of absorption and re-emission one has fluorescence .
Strontium has fluorescence spectra, ( google search gives a number of references) so further study would be necessary to determine whether the spot registered on the film is fluorescence or reflection.
The right sequence is:
Prepare the disk to removal (from Dell OpenManage or other software that manage your raid controller).
Remove the fault disk.
Insert new disk.
Rebuild the virutal disk (from Dell OpenManage).