Three little bones

Shortly after Elizabeth's ascension to the throne, and paralleling the development of the transistor as I have outlined before, a boy was born, a boy who loved mud, dirt and making things.

Aided by a trip to Woolworths where his father purchased battery, flashlight bulb, switch and wire, he became infatuated with all things electricity. Meanwhile, out in the world, Moore's law was making its interminable progress

As a boy he loved to take things apart to "see how they worked". Regrettably he was not equally good at reassembling them, so in consequence he amassed (and probably still does) a vast stock of bits and pieces. On one, well-remembered occasion he attempted to build a radio using these parts. The chassis was made of Meccano and there was an ear phone and a volume control somewhere in the mix, but these and many other pieces he joined together without much understanding and somewhat randomly. He reasoned that the stuff had once constituted a working radio so why not again? To his upmost disappointment it did not work. He got better at this sort of thing over time although probably still reveres the age old method of trial and error mixed with a good portion of hope which gave Edison the light bulb.

Later he was taken to an amateur showing  see the Moody Science Institute Faith and Faith film "Dust or Destiny" which explored the wonders of the human body. He was, of course, fascinated, hooked, even infatuated. Then it was in 16mm acetate medium and the projector interested him almost as much as the content. Now-a-days you can watch these films on Youtube. 

At that time in school biology he happened to be studying the five senses and recalls handing in some homework in which he had reproduced material from the film in graphic detail: he got full marks but also a caution about keeping to the question...

But the workings of the ear (to take one example) are indeed amazing. Here's a picture of the three bones of the inner ear, which carry out impedance matching to maximise the transfer of energy from airborne sound to vibrations in the inner ear fluid.  Striking a tuning fork and then pressing its foot onto a wooden surface amplifies the sound in a similar way. All fine and dandy in theory, but if I were to design a microphone with inner workings that looked this messy I can be pretty sure it would fall on deaf ears so to speak.

Three tiny bones in the middle ear

Quote: The malleus and incus are suspended by two ligaments that provide an axis of rotation so that the middle ear bones pivot when the tympanic membrane vibrates. The footplate of the stapes inserts into the oval window of the inner ear whence nerve endings detect what we perceive as sound.

And then there's the cochlea or organ of Corti, the inner ear which transfers these vibrations into nerve impulses. All told, the ear surpasses most if not all man-made microphones in terms of sensitivity (quote the sensitivity of the ear is close to the ultimate limit at which it would begin to detect the noise fluctuations in the air) and dynamic range (around 120dB).

Quote: The inner ear is divided into two fluid filled chambers... The fluid in the two chambers differs on the basis of the kind of salt that each contains. The fluid in the outer or bony chamber is filled with a sodium salt solution (called perilymph) that resembles the salt composition in the blood or the fluids found in the brain. The inner or membranous chamber is filled with a potassium salt solution (endolymph) that resembles the fluid that is normally found inside the cells of the body. Specialized cells that line parts of the membranous chamber and “pump” potassium into the membranous chamber maintain the difference in concentration between the two chambers. The difference in the chemical composition of these two fluids provides chemical energy (like a battery) that powers the activities of the sensory cells. 

The inner ear organs must be small because any increase in their size would increase their mass... [which would] decrease the sensitivity... The mass of the cochlear sensory epithelium is further reduced because it has only a small number of blood vessels... reduced by a unique system for converting the metabolic energy from sugar and oxygen in the blood into an electrical potential... the auditory system is sensitive enough to “hear” the vibrations associated with blood moving through blood vessels. It is fortunate they are located away from the organ of Corti.

There's much more detail freely available on the internet. You can find papers that purport to explain such workings of the human body and the implied evolutionary process but they often seem to me to use highly specialised terms only to obfuscate, for example (my emphasis):

All reptiles and birds have only one middle ear ossicle [bone], the stapes or columella. How these two additional ossicles came to reside and function in the middle ear of mammals has been studied for the last 200 years and represents one of the classic example of how structures can change during evolution to function in new and novel ways. From fossil data, comparative anatomy and developmental biology it is now clear that the two new bones in the mammalian middle ear, the malleus and incus, are homologous to the quadrate and articular, which form the articulation for the upper and lower jaws in non-mammalian jawed vertebrates. The incorporation of the primary jaw joint into the mammalian middle ear was only possible due to the evolution of a new way to articulate the upper and lower jaws, with the formation of the dentary-squamosal joint, or TMJ in humans. The evolution of the three-ossicle ear in mammals is thus intricately connected with the evolution of a novel jaw joint, the two structures evolving together to create the distinctive mammalian skull. 

Suffice it to say the design of the human ear is remarkable. Some would see this as evidence for an Intelligent Creator but then what or who designed the creator? By introducing God the need for intelligent design has simply been shifted. That all reptiles and birds have only one middle ear bone whilst we have three implies an evolutionary step which creationists contest. I am not endorsing either view (frankly I do not know) but I do marvel at how a bunch of bones, tissues, blood and gore could possibly detect sound with a sensitivity sensitivity close to the theoretical limit and enable us to communicate and to enjoy the emotional depths and artistry of music. Could a random assembly of electronic components ever become a first class radio receiver?

A very significant time

The Coronation of Elizabeth II took place on 2 June 1953 at Westminster Abbey in London. She acceded to the throne at the age of 25 upon the death of her father, George VI, on 6 February 1952.

Although the very first transistor was created in the lab towards the end of 1947, production didn't start until 1951 and the first application to hit the masses, the transistor radio, was demonstrated in August 1953.

Cradled somewhere amongst those very significant dates the Irish Dodo was born,. He has seen the Queen continue her duties into her 95th year as the longest serving British monarch, and seen 50 years of Moore's law obeyed (that the number of transistors in an integrated circuit aka silicon chip should double every two year) so that last year 2.6 trillion transistors were integrated into a single integrated circuit to create a deep learning engine called the Wafer Scale Engine 2.

Back then such advances could not be countenanced. Check out this video The Transistor: a 1953 documentary, anticipating its coming impact on technology with the possibility that, using transistors, a computer might then be small enough to fit into an average room. Little did they know.

What marvels will my grandchildren see and enjoy?  Assuming things continue as they have these last 60 or so years. Things that we cannot even now imagine? A tower of Babel?

The end is nigh

 Moore's Law is the empirical observation that the number of transistors in a dense integrated circuit doubles about every two year and it has approximately held true since it was proposed in 1965.

It is driven by the economics of the insatiable demand for ever increasing electronics complexity and the steady reduction in feature size in the fabrication of silicon chips (integrated circuits).

In 2013 Robert Calwell vowed the end would come in 2022, maybe even 2020, with the herald of 7nm and even 5nm feature size.

And today the BBC has announced that Apple's new flagship iPhone 12 will incorporate the "A14" processor with 5nm feature size - the chip's transistors have been shrunk down - the tiny on-off switches are now only about 25 atoms wide - allowing billions more to be packed in.

These electronic chips use "solid state" technology, i.e. they have no moving parts which makes it sound like they can never wear out, will last forever short of physical damage. Alas, such is a dream. I am well used to using Flash and other types of non-volatile solid state memory (chips) in my work and I am all too aware that the specification documents mention a lifetime of sometimes as little as 100,000 re-write cycles. When software is running at GHz speeds this many can clock up quite fast!

Chips are made by first growing a very pure silicon crystal, slicing it into wafers, and then diffusing into it a photographic pattern of known amounts of certain impurities that give the silicon its required special electrical properties. Diffusion (the intermingling of substances by the natural random movement of their particles) is both the essential mechanism and Achilles' heel of solid state chips.

Back in college days I was told that the lifetime of a solid state circuit was limited by diffusion - what can be diffused in to make it work can, by the same token, diffuse out and self destroy it. OK, it is diffused in at high temperature where the particles are in much stronger random movement, so what may take seconds to diffuse in might take many years to diffuse out at room temperature. But the smaller the feature size, the more likely that diffusion defects can occur - the particles have less distance to move.

The aging problem is discussed in this paper - so I am not just imagining it!  Many people regard their cell-phone as a consumable item, with expectation that it be replaced after a year or so. Those people may have limitless bottoms to their purses but I, for one, am happy enough with my Pixel 2 and have no desire to shell out to upgrade it. So I'm hoping that all those billions of transistors inside will not diffuse into randomness too soon. All are of the dust, and all turn to dust again.