Entropy

Entropy (pronounced en-truh-pee)

(1) In thermodynamics,  the capacity factor for thermal energy that is hidden with respect to temperature; an expression of the dispersal of energy; a measure of the energy is spread out in a process, or how widely spread out it becomes, at a specific temperature.

(2) In thermodynamics (on a macroscopic scale), a function of thermodynamic variables, as temperature, pressure, or composition, that is a measure of the energy not available for work during a thermodynamic process (a closed system evolves toward a state of maximum entropy).

(3) In statistical mechanics, a measure of the randomness of the microscopic constituents of a thermodynamic system (symbol=S).  Technically, a statistical measure of the disorder of a closed system expressed by S = k log P + c where P is the probability that a particular state of the system exists, k is the Boltzmann constant, and c is another constant).  Expressed as joules per kelvin, it's essentially a measure of the information and noise present in a signal.

(4) In data transmission and information theory, an expression of specific efficiency, a measure of the loss of information in a transmitted signal or message.

(5) In cosmology, a hypothetical tendency for the universe to attain a state of maximum homogeneity in which all matter is at a uniform temperature (heat death).

(6) In political science, a doctrine of inevitable social decline and degeneration; the tendency of a system that is left to itself to descend into chaos (this definition widely used literally and figuratively in many fields.

(7) In modeling theory and applied modeling, a lack of pattern or organization; a state of marked disorder; a measure of the disorder present in a system.

1867: From the German Entropie, coined in 1865 by German physicist and mathematician Rudolph Clausius (1822–1888) by analogy with Energie (energy), replacing the root of Ancient Greek ἔργον (érgon) (work) by the Ancient Greek τροπή (tropḗ) (transformation).  The Ancient Greek ἐντροπία (entropía) (a turning towards) is from energie, the construct being en (in) + trope (a turning, a transformation) from the primitive Indo-European trep (to turn).  Rudolph Clausius had for years been working on his theories before he coined the word Entropie to describe what he had been calling "the transformational content of the body."  The new word encapsulated the second law of thermodynamics as "the entropy of the universe tends toward a maximum" but Clausius thought the concept better illustrated by the mysterious disgregation (an series of equations explaining dissolution at the particle level), another of his coinings which never caught on in the same way.  Entropy & entropology are nouns, entropic is an adjective and entropically is an adverb; the noun plural is entropes.  The synonym entropia is an internationalism rarely used in English.

Entropy describes uncertainty or disorder in a system and, in casual use, refers to degradation or disorder in any situation, or to chaos, disorganization, or randomness in general.  In a technical sense, it is the gradual breakdown of energy and matter in the universe and is an important part of several theories which postulate how the universe will end.  The laws of thermodynamics describe the relationships between thermal energy, or heat, and other forms of energy, and how energy affects matter.  The First Law of Thermodynamics states that energy cannot be created or destroyed; the total quantity of energy in the universe stays the same. The Second Law of Thermodynamics is about the quality of energy.  It states that as energy is transferred or transformed, more and more of it is wasted. The second law also states there is a natural tendency of any isolated system to degenerate into a more disordered state; at a microscopic level, if a system is isolated, any natural process in that system progresses in the direction of increasing disorder, or entropy, of the system.  The second law also predicts the end of the universe, implying the universe will end when everything becomes the same temperature. This is the ultimate level of entropy; if everything is the same temperature, nothing can happen and energy can manifest only as the random motion of atoms and molecules.  Time would stop immediately after the point at which, for the first time since the point at which the big bang happened, everything was happening at the same time.

Lindsay Lohan and her lawyer in court, Los Angeles, December 2011.

The term entropology is a portmanteau word (the construct of the blend being entrop(y) +‎ (anthrop)ology) which was 1955 coined by the French anthropologist Claude Lévi-Strauss (1908–2009) whose theories and models even today continue to underpin some of the framework of structural anthropology, the debt to him acknowledged by structuralists in many fields and apart from all else, in the social sciences, words like entropology are much admired.  It first appeared in his book Tristes Tropiques (Sad Tropics (1955)) a text itself structurally interesting, being in part travelogue, research paper and memoir, interspersed with philosophical musing on music, literature, history, architecture and sociology; these days it’d be called post-modern.  The essence of entropology is that the transformative path of human cultures (the sometimes separate, sometime parallel notion of “civilization” seemed not to trouble Lévi-Strauss) is inherently corrosive & disruptive.  It seemed a grim thesis but it must be admitted that by 1955, there was plenty of evidence to support his view.

A probably inaccurate representation of nothing.

The idea of nothing, in a universal sense in which literally nothing (energy, matter, space or time) exists is difficult to imagine, imaginable presumably only as infinite blackness although even that would seem to imply the spatial.  That nothingness is perhaps impossible to imagine or visualize doesn’t however prove it’s impossible but the mere fact matter, energy and time now exist in space does imply that because, were there ever nothing, it’s a challenge to explain how anything could have, from nothing, come into existence.  Despite that, it would be interesting if cosmologists could attempt to describe the mathematics of a model which would describe what conditions would have to prevail in order for there truly to be nothing.  That may or may not be possible but might be an interesting basis from which to work for those trying to explain things like dark matter & dark energy, either or both of which also may or may not exist.  Working with the existing universe seems not to be helpful in developing theories about the nature of all this supposedly missing (or invisible) matter and energy whereas were one, instead of working backwards as it were, instead to start with nothing and then work out how to add what seems to be missing (while remaining still not visible), the result might be interesting.

Guidance

Guidance (pronounced gahyd-ns)

(1) The act or function of guiding; leadership; direction.

(2) When used as a modifier (marriage guidance et al), advice or counseling (that provided for students choosing a course of study or preparing for a vocation; that given to couples with “marriage problems” etc).

(3) Supervised care or assistance, especially therapeutic help in the treatment of minor emotional disturbances, use prevalent in the management of “troubled youth”.

(4) Something that guides (used of both hardware & software).

(5) The process by which the flight of a missile or rocket may be altered in speed and direction in response to controls situated either wholly in the projectile or partly at the point of launch (ground, air, sea or space-based).

(6) The general term for the part of the publishing industry devoted to “self-help” titles.

1765–1775: The construct was guide + -ance.  Guide dates from the mid-fourteenth century and was from the Middle English guide (to lead, direct, conduct), from the Old French verb guider (to lead; to conduct (guide the noun), from the Old Occitan guida, from the earlier guier & guidar, from the Frankish wītan (to show the way, lead), from the Proto-Germanic wītaną & witanan (to see, know; go, depart (also “to look after, guard, ascribe to, reproach”)), from the primitive Indo-European weyd or weid (to see, know).  It was cognate with the Old English wītan (to see, take heed to, watch after, guard, to keep) and related to the Modern English wit.  The Proto-Germanic was the source also of the German weisen (to show, point out) and the Old English witan (to reproach) & wite (fine, penalty).  The development in French was influenced both by the Old Provençal noun guidar (guide, leader) and the Italian guidare, both from the same source.  The suffix -ance was an alternative form of -ence, both added to an adjective or verb to form a noun indicating a state or condition, such as result or capacity, associated with the verb (many words ending in -ance were formed in French or by alteration of a noun or adjective ending in –ant).  The suffix -ance was from the Middle English -aunce & -ance, from the Anglo-Norman -aunce and the continental Old French -ance, from the Latin -antia & -entia.  The –ence suffix was a word-forming element attached to verbs to form abstract nouns of process or fact (convergence from converge), or of state or quality and was from the Middle English -ence, from the Old French -ence, from the Latin –entia & -antia (depending on the vowel in the stem word).  The Latin present-participle endings for verbs stems in -a- were distinguished from those in -i- and -e- and as the Old French evolved from Latin, these were leveled to -ance, but later French borrowings from Latin (some of them subsequently passed to English) used the appropriate Latin form of the ending, as did words borrowed by English directly from Latin, thus diligence, absence et al.  There was however little consistency, English gaining many words from French but from the sixteenth century the suffix –ence was selectively restored, such was the reverence for Latin.  Guidance is a noun; the noun plural is guidances.

Lindsay Lohan's latter-day Cady Heron as a High School guidance counsellor.  In November 2023, Karen Smith (Amanda Seyfried (b 1985)), Gretchen Wieners (Lacey Chabert (b 1982)) & Cady Heron (Lindsay Lohan (b 1986)) were re-united for a presumably lucrative commercial for Walmart's upcoming Black Friday sale.  Constructed as a Mean Girls (2004) spoof and replete with references & allusions, Lindsay Lohan's now grown up Cady Heron appeared as North Shore High School's guidance counsellor, a self-explanatory joke.

The use of the word in jargon divides essentially into two classes, technical & descriptive.  Technical use includes the form “autoguidance” (the construct being auto(matic) + guidance) which is a general term describing the mechanical or electronic devices used to provide a machine with the ability autonomously to move without relying on external directional inputs.  Autoguidance systems date back decades and originally relied on the interaction of stuff like gyroscopes, accelerometers & altimeters (then known as “inertial guidance”) but became more integrated as electronics became smaller and improved in capacity & durability.  The most publicized use was in “guided missiles”, a term which entered general use in the 1950s (although it first appeared in British documents in 1944 in the sense of “a projectile capable of altering course in flight”, distinguishing the German V2 ballistic missile from the V1 (an early (unguided) cruise missile)) and the development of artificial intelligence (AI) has not only refined the technology but actually shifted the paradigm to one in which the machine (in some sense) makes "decisions", a process different from earlier autoguidance systems which were pre-programmed with a defined set of parameters which limited the scope of “decision making” to certain options.  The worrying implication of AI is that it might start making “its own decisions”, not because it has achieved some form of consciousness (in a sense comparable to that possessed by humans) but because the code produces unintended consequences.  When lines of code can be in the millions, not every permutation of events can be tested (although the use of AI should raise the count).  “Teleguidance” came into use to refer to the remote guidance of missiles and torpedoes but later also became a part of “space guidance” (an omnibus term encompassing the guidance operations required to launch a spacecraft into orbit or space, navigate in space and return to Earth or some other place).  Space guidance is especially complex because there can be a lag of minutes or hours between instructions being sent from Earth and received by the craft, thus the need for ground-based transmissions to interact with autoguidance systems.  Specialized forms in engineering include “non-guidance”, “pre-guidance” & “self-guidance”, all of which can be used of hardware components or segments of software within the one guidance system.

Quantum Physics for Dummies by Steven Holzner PhD (1957-2013) sounds like a Pythonesque joke title but it’s real and provides genuinely useful guidance on one of science’s more impenetrable topics.  For most of us, reading it will not mean we will understand quantum physics but it will help us more fully to understand what we don’t know; it is a good self-help book.

The term “e-guidance” is different in that it was just a buzz-phrase (which never really caught on) which referred to guidance given electronically (ie using the internet) and the forms which evolved (teleconferencing, telemedicine) were different again; they referred usually to human-to-human contact via screens rather than in person.  The descriptive uses included the familiar forms such as “guidance counselor”, “marriage guidance” & “guidance industry”, the latter responsible for the dreaded self-help books which although genuinely useful if focused on something specific (eg SpeedPro's highly recommended How to Build & Power Tune Weber & Dellorto DCOE, DCO/SP & DHLA Carburettors), also includes titles like “Getting Closure in Seven Days” or “201 Ways to Feel Better” (even God handed down only 10) et al, the utility of which varied to the extent it’s tempting sometimes to apply the noun “misguidance”.  Misguidance seems not to be used by those whose guidance systems have gone wrong, engineers preferring the punchy “fail” while the management-speak crew came up with “unplanned event”.

Guidance “books”, in one form or another can be traced back thousands of years and while there is evidence multiplication algorithms existed in Egypt (circa 1700-2000 BC) a handful of Babylonian clay tablets dating from circa 1800-1600 BC are the oldest guidance documents yet found, containing not solutions to specific issues but a collection of general procedures for solving whole classes of problems.  Translators consider them best understood as an early form of instruction manual and one tablet was found to include “This is the procedure”, a phrase familiar in many modern publications.  “Guidance” seems to have appeared in book titles in the 1610s.  In 2016, Lindsay Lohan threatened the world with a self-help book offering guidance on living one’s life.  It’s not clear if the project remains in preparation but hopefully a book will one day emerge.

Kim Jong-un & Kim Ju-ae with entourage (pencils poised) on an official visit to a Pyongyang greenhouse farm.

On Saturday 16 March, the DPRK’s (Democratic People’s Republic of Korea (North Korea)) state media department issued a statement, referring to Kim Jong-un’s (Kim III, b 1982; Supreme Leader of DPRK since 2011) daughter as “great person of guidance”, a term Pyongyangologists swiftly noted was reserved usually for senior leaders, the implication being a programme was in place preparing her status as a potential successor, thus one day becoming Kim IV.  The analysts said it was significant the statement was issued in both English and Korean-language versions of the official Korean Central News Agency report on the visit by the Supreme Leader and his daughter (within the family presumably now thought the "Supreme Daughter") visit to a greenhouse farm.  Attaching great importance to the use of the plural form of the honorific (the unavoidable suggestion being it applied to both), the analysts noted the crucial sentence:

“The great persons of guidance, together with cadres of the Party, the government and the military went round the farm.”

The existence of the Supreme Daughter has for some time been known although the official details are scant, her age or name never mentioned by state media but according to South Korean’s military intelligence service, her name is Kim Ju Ae and she is now aged thirteen.

Official DPRK Central News Agency photograph: Ri Sol-ju (b circa 1987; wife of Supreme Leader Kim Jong-un) (left), Kim Ju-ae (b circa 2011; daughter of Kim Jong-un) (centre) and Kim Jong-un (Kim III, b 1982; Supreme Leader of DPRK (North Korea) since 2011) (right), undisclosed location, February 2023.

The Kim regime, which will have the same sensitivity to domestic public opinion as any authoritarian or despotic operation (an often under-estimated political dynamic in such systems) and it would seem the groundwork for a possible succession has been in preparation for some time.  The appearance in 2023 of Kim Ju-ae at a banquet and subsequent parade commemorating the 75th anniversary of the Korean People's Army (KPA) attracted interest and even then the DPRK-watchers thought it might be a signal she had been anointed as Kim IV to succeed the Supreme Leader when he dies (God forbid).  That was actually her second public appearance, the first in 2022 when she accompanied her father inspecting some of his nuclear missiles, the big rockets long a family interest.  Fashionistas were on that occasion most impressed by the presumptive Kim IV in 2022 because she was dressed in black white & red, matching the color scheme the DPRK uses on its intercontinental ballistic missiles (ICBM); everyone thought that a nice touch.  In honor of the occasion, the DPRK issued a range of ICBM-themed postage stamps featuring the daughter.

Daddy-Daughter day with ICBMs: DPRK postage stamp issue featuring ICBMs, the Supreme Leader & his daughter, Kim Ju-ae.  Like most eleven year old girls, Kim Ju-ae seemed much taken by the beauty of nuclear weapons.

However, the publicity attached to the Kim’s visit to the farm was believed to be the “first expression of elevating Kim Ju Ae to the ranks” of the leadership according to a statement from Seoul’s University of North Korean Studies (UNKS) in Seoul, something confirmed by the Sejong Institute’s Center for Korean Peninsula Strategy (CKPS) which noted the North Korean term hyangdo (guidance) was typically only reserved for “top leaders or successors.”  Attributing meaning to actions in the DPRK seems sometimes more art than science and the record is patchy but the CKPS observed “this level of personal worship for Kim Ju Ae strongly suggests that she will succeed Kim Jong Un as the next leader of North Korea" and it certainly follows the pattern of behavior adopted in the run-up to Kim Jong-il (Kim II, 1941-2011; Dear Leader of DPRK 1994-2011) inheriting the country in 2011 after the death of Kim Il-sung (Kim I, 1912–1994; Great Leader of DPRK 1948-1994).  Notably, the lesson of the political uncertainty after the unexpected early death of the Dear Leader may have been learned and the mistake of not having prepared international & domestic opinion for the reign of the Supreme Leader will not be repeated.  In this, the public appearances and use of “great person of guidance” can be thought of as the early building blocks of the Stalinist personality cult used to reinforce and perpetuate the rule of the Kims since the 1950s.  Since her debut, Kim Ju Ae has appeared at a number of her father's official engagements which have included a visit to a poultry farm, military drills & parades and a tour of a weapons factory.  All this is taken as solid evidence Kim Ju Ae is the preferred successor and she can be thought of as something like a “crown prince” or “crown princess”; the heir to the throne.  It has never been confirmed is the new Supreme Daughter is the oldest or even an only child because the rumors of one or more sons have never been confirmed although the reports persist, including that the health of the possible son is not good.  By contrast, the official photographs seem to suggest Kim Ju Ae is in rude good health and although reports of food shortages in the DPRK appear frequently, she certainly looks well.

The Dear Leader (left), the Supreme Leader (centre) and the Supreme Daughter (right), looking at things through binoculars.  Dating from the time of the Great Leader, looking at things through binoculars is a family tradition and there have been websites devoted to the subject. 

Of course, while deconstructing phrases from Pyongyang is an exercise both abstract and remote for the DPRK-watchers, for the people of North Korea who have enjoyed some 75 years of guidance from the Great Leader, the Dear Leader and the Supreme Leader, the prospect of decades more of the same from the Supreme Daughter will be of more immediate interest.  Public opinion in the DPRK is difficult to assess (although The Economist did publish an interview with the Dear Leader in which he admitted genuine support for the regime was likely little more than 25%) but it shouldn’t be assumed the folk there are not sophisticated consumers of political information and as the despairing staff of old Barry Goldwater (1909–1998) used to beg the press, they may be more focused on “what he means, not what he says.”

The second of the DPRK Central News Agency's photographs recording the visit to the greenhouse farm.  Fashionistas will be interested to learn the wearing of leather is a more recent family thing, started by the Supreme Leader who reportedly has banned his subjects from donning black leather, the echo of a number of royal households who centuries ago imposed a proscription on commoners using the color purple which was reserved for royalty.  Of course, the sartorial choice may be something purely pragmatic, black garments known to be "most slimming" and whether the ban has been extended to the Supreme Daughter's fetching chocolate brown has been neither confirmed nor denied.  The notebooks carried by civilian & military members of the entourage are both compulsory & essential: if the Supreme Leader says something interesting, they write it down and presumably, should the Supreme Daughter say something interesting, that too will be noted although experienced stenographers develop techniques to limit the workload.  Those employed at World War II (1939-1945) Führerhauptquartiere (Führer Headquarters) admitted they never bothered writing down the first thing said by the famously sycophantic Wilhelm Keitel (1882–1946; Nazi field marshal & head of Oberkommando der Wehrmacht (OKW), the armed forces high command) because it was always the last thing said by Adolf Hitler (1889-1945; Führer (leader) and German head of government 1933-1945 & head of state 1934-1945).

Corona

Corona (pronounced kuh-roh-nuh)

(1) A white or colored circle or set of concentric circles of light seen around a luminous body.

(2) In meteorology, such a circle or set of circles having a small radius and ranging in color from blue inside to red outside, attributable to the diffraction caused by thin clouds, mist, or sometimes dust (distinguished from halo).

(3) In solar astronomy, a faintly luminous envelope outside of the sun's chromosphere, the inner part consisting of highly ionized elements; also called aureola & aureole.

(4) A long, straight, un-tapered cigar, rounded at the closed end.

(5) In botany, a crown-like appendage, especially one on the inner side of a corolla, as in the narcissus.

(6) In anatomy, the upper portion or crown of a part, as of the head.

(7) In architecture, the projecting, slab-like member of a classical cornice supported by the bed molding or by modillions, dentils, etc., and supporting the cymatium.

(8) The tonsure of a monk or other cleric.

(9) In ecclesiastical dress, a gold-colored stripe around the lower edge of a clerical headdress, as of a miter.

(10) A chandelier of wrought metal, having the form of one or more concentric hoops.

(11) In zoology, the head or upper surface of an animal, such as the body of an echinoid or the disc and arms of a crinoid.

(12) As Coronaviruses, a group of viruses which infect mammals and birds.  In humans, they cause usually mild (including 229E, the common cold) respiratory infections but forms such as SARS, MERS the famous COVID-19 can be lethal.

1555–1565: From the Latin corōna (garland, crown) from the Ancient Greek κορώνη (korṓnē or korōnis (crown, any curved object)), akin to korōnís (wreath; curved, beaked) & kórax (crow; raven); related was the Latin curvus (curved).  A doublet of crown, the plural forms are coronas & coronae.

COVID-19 and Coca-Cola

COVID-19 (an abbreviation of coronavirus disease 2019) was the name of the disease caused by SARS-CoV-2.  The name was adopted in February 2020, chosen by the World Health Organization (WHO) in partnership with the Committee on Taxonomy of Viruses; until then, variously it had been called 2019-nCoV, Novel coronavirus or Wuhan coronavirus.  SARS-CoV-2 is related to MERS-CoV (which causes Middle East respiratory syndrome (MERS)) and SARS-CoV (which causes severe acute respiratory syndrome (SARS)).

The Sun and its corona (left) and a depiction of the SARS-CoV-2 virus (bottom).

The class to which these viruses belong is called corona because, when viewed under an electron microscope, there’s a resemblance to the crown-like corona (the halo or ring of fire) around the Sun, seem when viewed through an appropriate telescope or other device.  The corona around the sun has long been known but viruses have been seen only since the development of the electron microscope because human viruses are very small, typically 100 nanometers (1 metre = 1,000 mm = 1,000,000 micrometres = 1,000,000,000 nanometres).  In the evolutionary timeline of life on earth, it's believed bacteria emerged quite some time before viruses.  Bacteria appear to have been one of the earliest forms of life and, because no evidence of life has yet been detected anywhere else in the universe, they're perhaps among the oldest anywhere.  Single-celled organisms with a relatively simple structure and capable of independent reproduction, bacteria are thought to have appeared some 3.5 to 3.8 billion years ago (the Earth dating back 4.5 billion) and the evidence suggests the viruses emerged 2-3 billions years ago.  Unlike bacteria, viruses are not considered living organisms in the traditional sense because they cannot carry out metabolic processes or reproduce on their own; instead, they are genetic material (DNA or RNA) enclosed in a protein coat.

As far as is known, all life forms now extant (and all extinct forms known) are descended ultimately from the one initial instance; life started once which means humans are related to cats, dogs, trees & bananas as well as to bacteria & viruses.  That makes people, bacteria and just about everything else vulnerable to infection by one virus or another, the consequences ranging from nothing to death but the behavior can also be used to advantage and a certain class of virus, the bacteriophage, after a long period of neglect during the antibiotic era, is attracting new interest.

Some viruses can be helpful: A depiction of bacteriophages phaging.

Not all viruses are bad like SARS-CoV-2.  A bacteriophage, known almost always as a phage, is a virus which infects and replicates within bacteria.  Phages are composites of proteins that surround a DNA or RNA genome and may encode any number of genes from a handful to many hundreds.  Phages replicate within the bacterium following the injection of their genome into the target cytoplasm.  Phages exist naturally in the environment and are among the most common and diverse entities on earth.  Serious research began in several parts of Europe during the late nineteenth century and have been used for almost a century as anti-bacterial agents the former USSR and Central Europe.  In the West, phage therapy (using specific viruses to fight difficult bacterial infections) has been of interest for some time, attention heightened as the problem of antibiotic-resistant bacteria (superbugs in the popular imagination) began to grow in severity (the US Centers for Disease Control and Prevention (CDC) attributes one death every 15 minutes in the US to superbugs).  Since the discovery of penicillin, antibiotics have been used as a reliable cure for those suffering from once lethal bacterial infections but, over decades, a handful (compared with the trillions and trillions killed) of bacteria have proved resistant to antibiotics and as these survivors multiply, new infections emerge.  Historically this had prompted the development of revised or new antibiotics but the biological arms race has reached the point where some infections caused by called antibiotic resistant bacteria cannot be treated and for many other serious infections, the number of potent “last resort” antibiotics is dwindling.

Hence the interest in phages, a type of “friendly virus” which can be weaponized to fight even the most virulent and persistent bacterial infections.  Phages work as well as they do because viruses like the tiresome SARS-Cov-2 that makes humans sick, phages can infect only bacteria and are selective about which they target, a vital aspect of their role in medicine because human survival depends on the billions of bacteria in our bodies.  These phages are far from rare, existing in the natural environment almost everywhere on the planet and scientists conducting research find dirty waterways or damp, aerated, warm, decaying soil (both areas where high bacterial growth might be expected) are good places to collect samples.  The advantages phages offer are well known but there are also drawbacks and indeed some of the features of phages manifest as both.  For example, the great specificity of phages helpful in that they can be administered safely with the knowledge that no other organisms will be harmed but this can be a practical disadvantage in clinical medicine when it’s not known exactly which bacteria need to be targeted, which is why broad-spectrum antibiotics proved so effective at scale.  Being wholly natural, the shelf-life of phages is highly variable and there’s little experience in their administration beyond some communities in Eastern Europe where they’ve been part of medical practice for over a century.  Additionally, bacteria can develop resistance even to phages and one practical impediment to deployment not well recognized until recent years is that compared to chemical molecules, phages are quite big and there are sites in the human body which will be inaccessible.

Electron micrograph of a Coronaviruses in colorized and in grey-scale.

The images captured from electron microscopes are always in black-and-white but are often artificially colored in the post-production process for better visualization and to assist with analysis.  Because of the resolution limit of the optical microscope, even at the highest magnification, viruses couldn’t be seen because their size meant they lay beyond the spectrum of visible light, the range of resolution being limited by the wavelength of the visible light that illuminates the specimen.  It was the resolution of the electron microscope, developed in the early 1930s, and able to offer an illumination with a wavelength much smaller than visible light which first made viruses visible.  An electron has the properties both of a particle and a wave so an electron’s wavelength is determined by its energy (or speed).  If an electron is accelerated to a speed of a million meters per second (circa 2.2 million mph (3.5 million km/h)) the physical wavelength is around one-tenth of a nanometer or about the size of an atom.  This permits an electron microscope to probe the structure of atoms in a crystal and thus see viruses.

Lindsay Lohan taking a 330ml lunch.

In February 2021, at a time when the official number of people with COVID-19 was around 107 million, mathematicians calculated all the COVID-19 causing SARS-COV-2 virus then circulating the planet easily would fit in a single (330ml) Coca-Cola can.  Using a model based on the viral load per currently infected victim (which varies during the duration of the infection), it was estimated there were at the time around two-hundred quadrillion (200 million billion or 2x10¹⁷). SARS-CoV-2 virus particles in the world.  Using that number, knowing the size of the virus, it was possible to calculate the total volume and even after accounting for the distinctive projecting spike proteins meaning the spherical particles will leave gaps when stacked together, the total is still less than the internal volume of the 330 millilitre can.

Two-hundred quadrillion is a really big number, there are said to be about that many grains of sand on the planet, but Sars-CoV-2 particles are really small, around a hundred nanometres (one nanometre is a billionth of a meter) so the radius of Sars-CoV-2 is roughly a thousand times thinner than a human hair.  The mathematicians multiplied the numbers, worked out the wastage of space caused by the troublesome spikes accounted for about a quarter of the total volume and concluded that in February 2021, the volume of SARS-CoV-2 in the world was 160 millilitres.  By mid-2021, cases had almost doubled so by then, either the can would be full or, given the margin of error associated with such calculations, a second can might be required.  The caveat to all this is that the math is based on the official number of infected people and nobody knows what the real is although all agree it will be higher but by what factor is guesswork, reliable data just not available to build a model.  Guesses have been proffered ranged from double to twenty times higher.  Depending on which of those is closest, a six-pack or a carton of cans might be filled.

Rare collector’s item: Lindsay Lohan MH Corona Extra tobacco card #480: US$5.00 on eBay.  Unrelated to this card is the specification of the corona cigars, straight-shaped cigars with rounded tops (the end taken to the lips) and defined by length: a corona about 5½ inches (140 mm) long; a petit corona (or corona chica) about 5 inches (125 mm) long, a tres petit corona about 4½ inches (115 mm) long & a half corona about 3¾ (95 mm) inches long.

The Toyota (Corona) 1600GT

1958 Toyota Corona "Van".

It was the Toyota Corona (1957-2001) which not only established the company in the vital US market but lent respectability to the very idea of the “Japanese car”, that term in the early 1960s not the by-word for quality and reliability it would in subsequent decades become.  Noting the success of the small (by US standards) Volkswagen Beetle and other imports, the company shipped a small number of Coronas to the US in the late 1950s but they were unsuitable for the environment (as indeed were a number of the diminutive European models which lacked the ruggedness of the VW) and interest was minimal, the Corona withdrawn from sale in 1960 although unsold models lingered on the lots for another year.

1966 "shovel-nose" Toyota Corona.

It was the third generation Corona, launched in September 1964 in an array of body styles, which was the Toyota passenger car to achieve international success, including in the US.  It was a thoroughly conventional design (ie mechanically a scaled down US sedan) with a body which was modern, inoffensive and practical although some thought the reverse-slanted nose strange.  It came to be nick-named the “shovel-nose” and proved ahead of its time, adopted in 1972 by Lancia for the Beta and in 1976 it appeared on Ford’s Escort RS2000 before variations of the shape eventually became the default for manufacturers seeking to eke out as much aerodynamic efficiency as possible.

The "shovel-nose" caught on: 1972 Lancia Beta (left) & 1976 Ford Escort RS2000 (right).  

The export range appeared in volume but the most desirable models were reserved for the JDM (Japanese domestic market), a long-standing, industry-wide practice which has had the effect of creating a minor export business for those who can satisfy the demand in markets like Australia, New Zealand & North America for the high-performance versions which have something of a cult-following.  The 1967 1600GT (or GT-5 for those with the optional five-speed gearbox) coupé (for this JDM “halo” model the Corona badge wasn’t used) was modest compared with some of the wild machinery which would appear in subsequent decades but by the standards of its time, there was some genuine sophistication.  The body was the standard two-door hardtop but the centrepiece was a double overhead camshaft (DOHC) cylinder head atop the 1600 cm³ four cylinder engine, the head designed by Yamaha which had also developed the one used on the straight-six in the exotic Toyota 2000 GT sports car made famous by the appearance of a custom built roadster version in the James Bond film You Only Live Twice (1967).

1967 Toyota 2000GT roadster.  Two 2000GT coupés were converted into roadsters for You Only Live Twice (one used for filming, the other a "back-up"), the work undertaken by Toyota’s special Toyopet Service Centre in Tsunashima.  The wire wheels were exclusive to the roadsters (15×5 inch magnesium wheels were used on the coupés) and the pair were very much movie props, neither vehicle fitted with side windows or a soft-top.  The "back-up car" is now on display in the Toyota Automobile Museum.

Known internally as the 9R, the 1600GT engine took a traditionally English approach to increasing power: twin carburetors, big valves and a high-compression ratio, the combination yielding a then impressive 110 horsepower at 6200rpm, the latter number something to note given the crankshaft was supported by only three main bearings.  Still, being a Toyota engine, reliability was solid and no history of bottom-end failure emerged; whether the unusual firing order (1243) had anything to do with this seems not to be discussed anywhere.  To cope with the new-found power, the Corona’s suspension was strengthened with re-calibrated springs and dampers along with two torque rods to locate the back axle.  That improved things but the Japanese manufacturers, although matching the Europeans in power, still had some way to go in achieving their dynamics; the 1600 GT was no cut-price Alfa Romeo.  It was though very well equipped, another lesson Toyota and other Japanese factories would (painfully) teach the West.  Always a low volume model, production of 1600 GTs totalled 2222, the last built late in 1968.

1967 Toyota 1600GT.  They were available also in red and white.

1974 Toyota Corona advertising.

The 1600GT's cult following notwithstanding, it really wasn't representative of the Coronas which went around the world and for decades provided owners and fleets with reliable, if uninspiring transport (very much the Camry of their time).  That made them memorable for many who may have enjoyed the charms of British, French or Italian machinery but found the quirks, oil-leaks, fragility or apparently insoluble issues electrical issues (often described as "gremlins") made ownership tiresome.  Toyota were aware of the advantage their approach (which put a premium on basic engineering and quality control over the finer points of handling and high-speed braking) and their advertising for the Corona in the 1970s said explicitly: "When your heart says Europe but your head says Japan".  People increasingly followed their heads and by 1989 Toyota released the Lexus, proving they were as good at building a Mercedes-Benz as they were at building Toyotas.  It took many attempts for Mercedes-Benz to become (almost) as good at building Toyotas.

Syzygy

Syzygy (pronounced siz-i-jee)

(1) In astronomy (actually borrowed from astrology!), the descriptor for either of the two positions (conjunction or opposition) of a celestial body when sun, earth, and the body lie in a straight line (since applied to the "straight-line configuration" of firstly three and later any number of celestial bodies in a gravitational system.

(2) Any two related things, either alike or opposite (obsolete except for historic references).

(3) In classical prosody, a group or combination of two feet, sometimes restricted to a combination of two feet of different kinds.

(4) In biology (especially zoology), the aggregation in a mass of certain protozoans, especially when occurring before sexual reproduction but can be used also when describing the asexual exchange of genetic material.

(5) In psychology, an archetypal pairing of contra-sexual opposites, symbolizing the communication of the conscious and unconscious minds.

(6) In mathematics, a relation between generators of a module.

(7) In medical pathology, a fusing of some or all of the organs.

(8) In genetics, the pairing of chromosomes in meiosis

1650-1660:  From the Late Latin sȳzygia (conjunction), from the Ancient Greek συζυγία (suzugía) (yoke of animals, pair, union of two, conjunction), from syzygein (to yoke together), the construct being an assimilated form of syn- (together) + zygon (yoke), from the primitive Indo-European root yeug- (to join).  In the Greek, the word produced also zeugnýnai (to yoke together), sometimes simplified in English transcription as synzugon.  In English, syzygy was adopted by astronomy in 1847.  In science there are a number of terms of classification based on syzygy, the most attractive of which is probably Syzygium samarangense (a taxonomic species within the family Myrtaceae (wax apple or Javan rose apple).  

In progress.

Syzygy was one of those words from the once respectable field of astrology later adopted by a number of scientific disciplines (astronomy, genetics, psychiatry, mathematics, zoology) and retained, even after astrology became widely regarded as disreputable.  In mathematics and the physical sciences, it was a handy descriptor of things which became paired or, however briefly, were in alignment although historically the emphasis was on "pair", a syzygy as able to be applied to an identical pair as two diametric opposites.  That permissiveness is now listed by most dictionaries as obsolete but is something to be noted when reading historic texts.

The origin of the application of the word in disciplines like psychiatry and psychology (noted more by its appearance in literary works than professional or academic papers) is thought by some to have been triggered by Russian philosopher Vladimir Solovyova (1853–1900) who used syzygy to denote “close union” and applied the concept in a variety of ways which influenced Russian writers not only in the nineteenth century but also those of the symbolist and neo-idealist movements of the later Soviet era and some critics agree Solovyov was at least one of the sources for Fyodor Dostoevsky's (1821–1881) characters Alyosha and Ivan Karamazov in The Brothers Karamazov (1880).  Very much in the tradition of   More controversial is the idea his book, The Meaning of Love (1892) (in which syzygy was introduced) is one of the philosophical sources of Leo Tolstoy's (1828-1910) much discussed The Kreutzer Sonata (1889); critics remain divided and opinions are argued with vigour although unusually united was the critical industry built around Carl Jung (1875–1961) and Sigmund Freud (1856-1939) (particularly the former's theories of the collective unconscious and the balancing of conscious and unconscious elements within an individual's psyche, although this was metaphorical and abstract compared to the use in astronomy and other sciences) which found strands of syzygy in the many themes of the self which so permeates their work.  Given the overarching concepts of (1) the individuation process and (2) the unions of individuals, especially of male and female tending to a totality, even a unity, it’s a word with some appeal to those who seem to value having something with such a range of adaptable meanings to use in works of speculative vagueness.

Cavitation

Cavitation (pronounced kav-i-tey-shuhn)

(1) The formation of pits on a surface.

(2) In fluid dynamics, the rapid formation and collapse of vapor pockets in a flowing liquid in regions of very low pressure (associated especially with devices such as rotating marine propellers or the impellers used in pumps.

(3) Such a pocket formed in a flowing liquid; the formation of cavities in a structure.

(4) In biology, the formation of cavities in an organ (used originally to describe those appearing in lung tissue as a result of consumption (tuberculosis)).

1868: The construct was cavit(y) + -ation.  Cavity was a mid-sixteenth century borrowing from Middle French cavité or the Late Latin cavitās, from the Classical Latin cavus (hollow, excavated, concave), the construct being cav +‎-ity (the nominal suffix).  The suffix -ation was from the Middle English -acioun & -acion, from the Old French acion & -ation, from the Latin -ātiō, an alternative form of -tiō (thus the eventual English form -tion).  It was appended to words to indicate (1) an action or process, (2) the result of an action or process or (3) a state or quality.  Cavitation is a noun, cavitate, cavitated & cavitating are verbs and cavitatory & cavitatory are adjectives; the noun plural is cavitations.

The original use of cavitation dates from 1868 and appeared in the literature of human pathology, describing “the formation of cavities in the body”, especially those appearing in lung tissue as a result of consumption (tuberculosis).  The use in fluid dynamics (particularly pumps and marine engineering) emerged in circa 1895 although oral use may have predated this: the verb cavitate (to form cavities or bubbles (in a fluid)) documented since 1892 so it was either a back-formation from cavitation or the construct was cavit(y) + -ate.  The related verbs were cavitated & cavitating.  The suffix -ate was a word-forming element used in forming nouns from Latin words ending in -ātus, -āta, & -ātum (such as estate, primate & senate).  Those that came to English via French often began with -at, but an -e was added in the fifteenth century or later to indicate the long vowel.  It can also mark adjectives formed from Latin perfect passive participle suffixes of first conjugation verbs -ātus, -āta, & -ātum (such as desolate, moderate & separate).  Again, often they were adopted in Middle English with an –at suffix, the -e appended after circa 1400; a doublet of –ee.  The noun supercavitation was a creation of plasma physics and described an extreme form of cavitation in which a single bubble of gas forms around an object moving through a liquid, significantly reducing drag.  As observational technology & techniques improved, the form ultracavitation also appeared to describe instances where instances of the phenomenon meant drag tended as close to zero as was possible.

Cavitation is an interesting aspect of fluid dynamics but it’s studied because it’s something which can cause component failure in devices like the pumps used for liquid, fluid & gas which can have catastrophic consequences for both connected equipment and people in the vicinity and beyond.  Such components typically feature robust construction but cavitation is a function of sustained operation (often 24/7) at high speeds and some vulnerable parts may be heavy and the fragmentation at high velocity of a heavy, reciprocating mass is obviously a serious problem.  Technically, it’s the formation of vapour- or gas-filled cavities in a flowing liquid when tensile stress is superimposed on the ambient pressure and one novelty in the science of cavitation was in 2021 noted by researchers in an oncology laboratory.  Using a gassy, explosive bacteria to destroy cancer cells by bombardment, the strikes were observed to produce a brief sonoluminescence (in physics, the emission of short bursts of light from imploding bubbles in a liquid when excited by sound), the cavitation bubbles producing a brief flash of light as they collapsed.

In the specific case of “pump cavitation”, the problem typically occurs when a hydraulic pumps which pumps liquids suffers a partial pressure drop.  What the change in pressure can induce is the formation of air bubbles, leading to cavity creation.  Inside the pump, the pressure shift transforms the liquid into a vapor which is then converted back to liquid by the spinning impellers.  The air bubbles thus are constantly moving inside the housing and as they implode during pressure changes, the surfaces of the impeller are eroded and it’s the creation of these tiny cavities which can accumulate sufficiently to weaken the structure to the point of failure.  The issue particularly affects centrifugal pumps but can occur in submersible devices.

Lindsay Lohan enjoying the effects of fluid dynamics.

Although something identified by engineers in the nineteenth century, the exact nature of cavitation wasn’t fully understood until the application in the 1950s of high-speed photography and the mathematical models developed then were later confirmed as close to exactly correct by computer simulations later in the century.  What was found was two causes of cavitation : (1) Inertial Cavitation in which a shock wave is produced by the collapse of bubble or void present in a liquid and (2) Non-inertial Cavitation which is initiated when a bubble in a fluid undergoes shape alterations due to an acoustic field or some other form of energy input.  Also observed were two behaviors of cavitation: (1) Suction Cavitation induced by high vacuum or low-pressure conditions which reduce the flow of fluid, bubbles forming near the eye of an impeller eye; as these bubbles move towards the pump’s discharge end, they are compressed into liquid, and they will implode against the impeller’s edge and (2) Discharge Cavitation which occurs when the pump’s discharge pressure becomes abnormally high, altering the flow of fluid, leading to internal recirculation, the liquid becoming “stuck” in a pattern between the housing (and the impeller) thereby creating a vacuum which in turn creates the air bubbles which will collapse and cavitate the impeller.

Representation of fluid dynamics under specific resonant conditions.

In fluid dynamics, a flow becoming “stuck” is often something to avoid but an aspect of the behavior can be exploited and it was a specific instance of certain “resonant conditions” Chrysler’s engineers exploited in 1959 when designing their Sonoramic induction system.  The idea wasn’t new, the math explained as early as 1863 and in racing cars it had been used for years but what Chrysler did was make it a focal point.  Sonoramic was an implementation of Sir Isaac Newton's (1642–1727) first law of motion, more commonly known as the law of inertia: “An object at rest tends to stay at rest and an object in motion tends to stay in motion” and it’s the second part which was exploited.  During the intake cycle of an engine, the fuel-air mix flows through the intake manifold, past the intake valve, and into the cylinder, then the intake valve shuts.  At that point, the law of inertia comes into play: Because the air was in motion, it wants to stay in motion but can’t because the valve is shut so it piles up against the valve with something of a concertina effect.  With one piece of air piling up on the next, the air becomes compressed and this compressed air has to go somewhere so it turns around and flows back through the intake manifold in the form of a pressure wave.  This pressure wave bounces back and forth in the runner and if it arrives back at the intake valve when the valve opens, it’s drawn into the engine.  This bouncing pressure wave of air and the proper arrival time at the intake valve creates a low-pressure form of supercharging but for this to be achieved all variables have to be aligned so the pressure wave arrives at the intake valve at the right time.  This combination of synchronized events is known as the “resonant conditions”.

Representation of cavitation in mechanical gears.

The behavior in pumps is now well understood and both design parameters and maintenance schedules are usually cognizant of cavitation and its potential consequences.  However, instances remain not infrequent, especially when pumps are fitted into systems by non-specialists, the most common causes being (1) low fluid pressure, (2) insufficient internal diameter of suction pipes, (3) excessive distances between a fluid source and a pump’s impeller(s), (4) pumps being run at too high a speed (which may be within a manufacturer’s recommendations but inappropriate for the system in which it’s installed), (5) too many fittings added to a suction pipe and (6) debris intrusion (often a consequence of inadequate filter cleaning & maintenance).  Cavitation is a function of speed and in devices such as slow-speed propellers (such as those in many marine applications), cavitation is not an issue, thus the frequent use of light, efficient, thin blades.