Undecennial

Undecennial (pronounced uhn-duh-seh-nee-uhl)

(1) Occurring or observed every eleventh year.

(2) As “undecennial magnetic period”, the Sun’s solar cycle.

1858: The construct was undec-, (from the Latin undecim, (eleven), the construct being unus (one) + decem (ten)) + -ennial.  The -ennial suffix was from the Latin -enniālis, the construct being annus (year (and figuratively “time, season, epoch”)) + -ium (the suffix used to form abstract nouns) + -ālis (suffixed to nouns or numerals creating adjectives of relationship).  It was a combining form denoting years.  The Latin undecentesimus was from ūndēcentum (ninety-nine; 99).  In Roman numerals, 99 was written as XCIX, the construct of which was XC (90: 100 minus 10) + IX (9: 10 minus 1) thus XC (90) plus IX (9) equals XCIX (99).  The fear of the number 11 is described as hendecaphobia.  The alternative adjective (and non-standard noun) is undecennary (once every eleven years) and the adjective in Portuguese is undecenal.  Undecennial & undecennary are adjectives and a (non-standard) noun; the noun plural is undecennials.

Centennial (every hundred years; commemoration of an event that happened a hundred years earlier) is the best known of the words suffixed with “-ennial” but there are fun constructs with meanings not immediately obvious including demisesquicentennial (75 years), the construct being demi- (half-of) +‎ sesqui- (one-and-a-half) +‎ centennial (of 100 years) and quadranscentennial (twenty-fifth anniversary (now often called “silver jubilee)), the construct being quad, from the Latin quadrans (quarter) + -ennium (a variant of annus) + -ālis (the “quad” thus a reference to the four 25 year quarter-centuries in a century).  Unfortunately, sexennial (pertaining to a period of six years; taking place once every six years) (the construct being sexennium (a period of six years) + -al) means just a “six year period or cycle” although in August 2024, in Boston Massachusetts there was the Sexennial: A Sex-Positive Variety Show.

In modern use, there’s also been some re-purposing.  The first use of “postmillennial” was to describe the world after the year 1000 and it has been used of things Pos-2000 but it was also adopted in the nineteenth century by certain Christian sects to describe the doctrine the Second Coming of Christ will take place after the millennium; the antonym was premillennial (pertaining to the belief the Second Coming will take place before the millennium.).  In the 21^st century, it’s used also of “Generation Z”, the one following the “Millennial Generation”.  Premillennial seems not to be used in this context (that would be the (Baby) Boomers).  The construct of the adjective perennial was the Latin perenn(is) (lasting through the whole year or for several years, perennial; continual, everlasting, perpetual”) + the English -al (the adjective-forming suffix imparting the meaning “of or pertaining to”.  It’s familiar from its use in botany where it describes plants active throughout the year, or having a life cycle of more than two growing seasons (and thus used sometimes in the sense of “appearing again each year; annual”) but is used also (sometime loosely) of waterways and such.  In figurative use, “perennial” is used widely (and loosely) of just about anything (art, music, politics et al) with the quality of or tending to “continuing without cessation or intermission for several years, or for an undetermined or infinite period; never-ending or never failing; perpetual, unceasing”.

Images from NASA’s Solar Dynamics Observatory highlight the appearance of the Sun at solar minimum (December 2019, left) versus solar maximum (May 2024, right).  These images are in the 171-angstrom wavelength of extreme ultraviolet light, which reveals the active regions on the Sun that are more common during solar maximum.

The Sun’s 11-year cycle was first detected in 1843 by German apothecary & amateur astronomer Heinrich Schwabe (1789–1875). Schwabe noticed a pattern in the number of sunspots that appeared on the Sun's surface over time.  In 1825 Herr Schwabe obtained his first telescope and between then and 1867 (on every day the skies were clear) he recorded the size & shape of sunspots and it was in 1838 he first suspected the phenomenon might be cyclical, his initial findings suggesting a ten-year cycle.  The discovery was wholly serendipitous because he wasn’t interested in sunspots (then thought random events) but was one of a number of astronomers searching for “Vulcan” a speculative planet in an orbit between Mercury which theories suggested should exist because its presence would account for the otherwise inexplicable peculiarities in Mercury's orbital path.  As a theory, the science was sound because earlier the same math had been used correctly to predict the existence of Neptune, based on calculation which determined the gravitational influence required to explain disturbances in the orbit of Uranus.  Over the decades, sightings of Vulcan had been reported but all quickly were discounted and the search continued until Albert Einstein’s (1879-1955) theory of general relativity (1915) was confirmed and Mercury's variation from the orbit predicted by Newtonian physics was understood to be a manifestation of the curvature of space-time induced by the mass of the Sun.

Because of Vulcan’s predicted proximity to the Sun, it would have been very difficult to observe with the telescopes of the nineteenth century, the only plausible method being to view it during its transit in front of the Sun.  The reason Herr Schwabe kept notebooks with almost daily sketches of the Sun and its spots was that he wanted to ensure he would never confuse a spot with the passing Vulcan and mush have be surprised when he noticed the suggesting of a cyclical pattern.  In 1843 he published his initial findings which indicated sunspot activity appeared to peak every ten-odd years and which his paper attracted little interest, it did inspire a Swiss professional astronomer to begin his own regular observations and these, combined with Herr Schwabe’s earlier drawings confirmed the sun’s undecennial pattern.  The use in 1858 of “undecennial” to describe the solar cycle seems to have been the first use of the word in English.

Visible light images from NASA’s Solar Dynamics Observatory highlight the appearance of the Sun at solar minimum (Dec 2019, left) versus solar maximum (May 2024, right). During solar minimum, often the Sun is "spotless".

The Sun's eleven-year cycle (the solar cycle) is driven almost wholly by changes in the body’s magnetic field dynamics.  The Sun’s magnetic field isn’t as stable as that of Earth which, although subject to some ongoing movement, retains its essential polarity for at least hundreds of thousands of years.  Deep within the Sun there exists a layer called the convection zone (where hot plasma rises, cools, and sinks) and these interactions, over time, cause the Sun’s magnetic field lines to twist and tangle.  Things are influenced also by differential rotation, the Sun rotating faster at its equator than at its poles (the equatorial regions taking some 25 days to complete a rotation, the polar regions around 35.  What this does is “stretches and wind up” the magnetic field lines, resulting in what astronomers describe as “a twisted, complex magnetic environment”.  All this combines to produce the “solar maximum & minimum”: Every eleven years the “twisted & tangled” magnetic field lines stretch to the point where suddenly they “snap”, creating a realigning process in which they are “straightened out”.  During solar maximum, the Sun has many sunspots (regions of intense magnetic activity), solar flares, and coronal mass ejections.  When the cycle resets to solar minimum, these activities reduce as the Sun's magnetic field temporarily stabilizes.  The other obvious effect of the undecennial magnetic period is the periodic polarity flip:  Every 11 years, the Sun’s magnetic poles reverse, north becoming south and vice-versa, something which happens on earth every few hundred-thousand years.

Quantum Tech Club's chart of the solar cycle: This cycle of low-high-low sun activity operates on a cycle of about eleven years though there are always variations, the length of each cycle not exact and the volume of activity also varies.  The previous Solar Cycle (24) was classified "not particularly active" and the current cycle (25) was predicted to be similar but it turned out to be more vibrant.  So, while the numbers bounce around, the undecennial pattern remains constant. 

For cultural reasons, an eleven year cycle sounds somehow strange to us and we’re unaccustomed to such things being associated with prime numbers although in entomology there are insects with no aversion to primes.  In entymology, there are insects with no fear of the number 17.  In the US, the so-called “periodical cicadas” (like those of the genus Magicicada) exist in a 17 year life cycle, something thought to confer a number of evolutionary advantages, all tied directly to the unique timing of their mass emergence: (1) The predator satiation strategy: The creatures emerge in massive numbers (in the billions), their sheer volume meaning it’s physically impossible for predators (both small mammals & birds) to eat enough of them to threaten the survival of the species. (2) Prime number cycles: Insects are presumed to be unaware of the nature of prime numbers but 17 is a prime number and there are also periodic cicadas with a 13 year cycle.  The 13 (Brood XIX) & 17-year (Brood X) periodic cicadas do sometimes emerge in the same season but, being prime numbers, it’s a rare event, the numbers' least common multiple (LCM) being 221 years; the last time the two cicadas emerged together was in 1868 and the next such even is thus expected in 2089.  The infrequency in overlap helps maintain the effectiveness of the predator avoidance strategies, the predators typically having shorter (2-year, 5-year etc) cycles which don’t synchronize with the cicadas' emergence, reducing chances a predator will evolve to specialize in feeding on periodical cicadas. (3) Avoidance of Climate Variability: By remaining underground for 17 years, historically, periodical cicadas avoided frequent climate changes or short-term ecological disasters like droughts or forest fires. The long underground nymph stage also allows them to feed consistently over many years and emerge when the environment is more favorable for reproduction.  Etymologists and biological statisticians are modelling scenarios under which various types of accelerated climate change are being studied to try to understand how the periodic cicadas (which evolved under “natural” climate change) may be affected. (4) Genetic Isolation: Historically, the unusually extended period between emergences has isolated different broods of cicadas, reducing interbreeding and promoting genetic diversity over time, helping to maintain healthy populations over multiple life-cycles.

Lohanic undecenniality: Lindsay Lohan at eleven year intervals: 2002 (left), 2013 (centre) and 2024 (right).

A “year” as defined (one orbit of our world around the sun) on Earth is a standard measure and on this planet it makes complete sense but in other places (such as the Sun) it’s just an abstraction although we map “years” onto many remote places, vast distances best understood as expressed in “light years” although cosmologists for many purposes prefer the parsec (a unit of astronomical length, based on the distance from Earth at which a star would have a parallax of one second of arc which is equivalent to 206,265 times the distance from the earth to the sun or 3.26 light-years.  Its lineal equivalent is about 19.1 trillion miles (30.8 trillion km)).  It takes Pluto 248 Earth years to make its orbit of the Sun so that’s the length of one Plutoian year, meaning that between being discovered in 1930 and the humorous cosmic clerks at the International Astronomical Union (IAU) in 2006 voting re-classify Pluto as a dwarf planet (on the basis that the icy orb failed to meet a set of criteria which the IAU claimed had been accepted for decades), not even on year had there passed.

So it’s only on Earth one of our “years” is of direct relevance and we tend to measure anniversaries with the numbers we prefer (1, 2, 5, 10, 20, 25, 50. 100, 250, 500, 1000, 10,000 etc) (21 is a special case) but this meaning nothing to the physics of the Sun and even here there have been cultures in which some things have tended to the undecennial.  In India, the Kumbh Mela (or Kumbha Mela) is one of the great pilgrimage festivals in Hinduism (the pre-Covid gathering in 2019 said to be the largest (peaceful) assembly of people ever known) and although it is celebrated in what tends to be a twelve year cycle, because of the complexity and regional distribution of some celebrations, there have been times when things have happened at an eleven year interval.  Among the indigenous peoples of North America (notably the Hopi), there were also reports from anthropologists of ceremonial cycles based on natural and astronomical cycles that can approximate an eleven year pattern due to environmental changes or social cycles, although it doesn’t appear the intervals ever assumed a precise, recurrent eleven-year pattern.  Certain ceremonies were linked with observations of the sun (and other celestial bodies), aligning closely with solar maximums in some cases.

Monolith

Monolith (pronounced mon-uh-lith)

(1) A column, large statue etc, formed originally from a single block of stone but latter day use applies the term to structures formed from any material and not of necessity a single piece (although technically such a thing should be described using the antonym: “polylith”.

(2) Used loosely, a synonym of “obelisk”.

(3) A single block or piece of stone, especially when used in architecture or sculpture and applied most frequently to large structures.

(4) Something (or an idea or concept) having a uniform, massive, redoubtable, or inflexible quality or character.

(5) In architecture, a large hollow foundation piece sunk as a caisson and having a number of compartments that are filled with concrete when it has reached its correct position

(6) An unincorporated community in Kern County, California, United States (initial capital).

(7) In chemistry, a substrate having many tiny channels that is cast as a single piece, which is used as a stationary phase for chromatography, as a catalytic surface etc.

(8) In arboreal use, a dead tree whose height and size have been reduced by breaking off or cutting its branches (use rare except in UK horticultural use).

1829: The construct was mono- + lith.  Mono was from the Ancient Greek, a combining form of μόνος (monos) (alone, only, sole, single), from the Proto-Hellenic mónwos, from the primitive Indo-European mey- (little; small).  It was related to the Armenian մանր (manr) (slender, small), the Ancient Greek μανός (manós) (sparse, rare), the Middle Low German mone & möne, the West Frisian meun, the Dutch meun, the Old High German muniwa, munuwa & munewa (from which German gained Münne (minnow).  As a prefix, mono- is often found in chemical names to indicate a substance containing just one of a specified atom or group (eg a monohydrate such as carbon monoxide; carbon attached to a single atom of oxygen). 

In English, the noun monolith was from the French monolithe (object made from a single block of stone), from Middle French monolythe (made from a single block of stone) and their etymon the Latin monolithus (made from a single block of stone), from the Ancient Greek μονόλιθος (monólithos) (made from a single block of stone), the construct being μονο- (mono-) (the prefix appended to convey the meaning “alone; single”), from μόνος (monos) + λίθος (líthos) (a stone; stone as a substance).  The English form was cognate with the German monolith (made from a single block of stone).  The verb was derived from the noun.  Monolith is a noun & verb, monolithism, monolithicness & monolithicity are nouns, monolithic is an adjective and monolithically is an adverb; the noun plural is monoliths.  The adjective monolithal is listed as "an archaic form of monolithic".

Monolith also begat two back-formations in the technical jargon of archaeology: A “microlith” is (1) a small stone tool (sometimes called a “microlite”) and (2) the microscopic acicular components of rocks.  A “megalith” is (1) a large stone slab making up a prehistoric monument, or part of such a monument, (2) A prehistoric monument made up of one or more large stones and (3) by, extension, a large stone or block of stone used in the construction of a modern structure.  The terms seem not to be in use outside of the technical literature of the profession.  The transferred and figurative use in reference to a thing or person noted for indivisible unity is from 1934 and is now widely used in IT, political science and opinion polling.  The adjective monolithic (formed of a single block of stone) was in use by the early nineteenth century and within decades was used to mean “of or pertaining to a monolith”, the figurative sense noted since the 1920s.  The adjective prevailed over monolithal which seems first to have appeared in a scientific paper in 1813.  The antonym in the context of structures rendered for a single substance is “polylith” but use is rare and multi-component constructions are often described as “monoliths”.  The antonym in the context of “anything massive, uniform, and unmovable, especially a towering and impersonal cultural, political, or social organization or structure” is listed by many sources as “chimera” but terms like “diverse”, “fragmented” etc are usually more illustrative for most purposes.  In general use, there certainly has been something of a meaning-shift.  While "monolith" began as meaning "made of a single substance", it's now probably most used to covey the idea of "something big & tall" regardless of the materials used.

One of the Monoliths as depicted in the film 2001: A Space Odyssey (1968). 

The mysterious black structures in Sir Arthur C Clarke's (1917–2008) Space Odyssey series (1968-1997) became well known after the release in 1968 of Stanley Kubrick's (1928–1999) film of the first novel in the series, 2001: A Space Odyssey.  Although sometimes described as “obelisk”, the author noted they were really “monoliths”.  In recent years, enthusiasts, mischief makers and click-bait hunters have been erecting similar monoliths in remote parts of planet Earth, leaving them to be discovered and publicized.  With typical alacrity, modern commerce noted the interest  and soon, replicas were being offered for sale, a gap in the market for Christmas gifts between US$10,000-45,000 apparently identified.

In IT, the term “monolithic driver” was used to refer to a software driver designed to handle multiple hardware components or functionalities within a single, large, and cohesive codebase.  In this it differed from earlier (and later) approaches which were modular or layered, the functionality is split into separate, smaller drivers or modules, each of which handled specific tasks or addressed only certain hardware components.  Monolithic drivers became generally available in the late 1980s, a period when both computer architecture and operating systems were becoming more sophisticated in an attempt to overcome the structural limitations imposed by the earlier designs.  It was in the era many of the fundamental concepts which continue to underpin modern systems were conceived although the general adoption of some lay a decade or more away.

During the 1970s & 1980s, many systems were built with a tight integration between software and hardware and some operating systems (OS) were really little more than “file loaders” with a few “add-ons”, and the limitations imposed were “worked-around” by some programmers who more-or-less ignored the operating system an address the hardware directly using “assemblers” (a flavor of “machine-code”).  That approach made for fast software but at the cost of interoperability and compatibility, such creations hardware specific rather using an OS as what came to be known as the HAL (hardware abstraction layer) but at the time, few OSs were like UNIX with its monolithic kernel in which the core OS services (file system management, device drivers etc.) were all integrated into a single large codebase.  As the market expanded, it was obvious the multi-fork approach was commercially unattractive except for the odd niche.

After its release in 1981, use of the IBM personal computers (PC) proliferated and because of its open (licence-free) architecture, an ecosystem of third party suppliers arose, producing a remarkable array of devices which either “hung-off” or “plugged-in” a PC; the need for hardware drivers grew.  Most drivers at the time came from the hardware manufacturers themselves and typically were monolithic (though not yet usually described as such) and written usually for specific hardware and issues were rife, a change to an OS or even other (apparently unrelated) hardware or software sometimes inducing instability or worse.  As operating systems evolved to support more modularity, the term “monolithic driver” came into use to distinguish these large, single-block drivers from the more modular or layered approaches that were beginning to emerge.

It was the dominance of Novell’s Netware (1983-2009) on PC networks which compelled Microsoft to develop Windows NT (“New Technology”, 1993) and it featured a modular kernel architecture, something which made the distinction between monolithic and modular drivers better understood and as developers increasingly embraced the modular, layered approach which better handled maintainability and scalability.  Once neutral, the term “monolithic driver” became something of a slur in IT circles, notably among system administrators (“sysadmins” or “syscons”, the latter based on the “system console”, the terminal on a mainframe hard-wired to the central processor) who accepted ongoing failures of this and that as inherent to the business but wanted to avoid a SPoFs (Single Point of Failure).

In political science, the term “monolithic” is used to describe a system, organization, or entity perceived as being unified, indivisible, and operating with a high degree of internal uniformity, often with centralized control. When something is labeled as monolithic, it implies that it lacks diversity or internal differentiation and presents a singular, rigid structure or ideology.  Tellingly, the most common use of the term is probably when analyzing electoral behavior and demonstrating how groups, societies or sub-sets of either. Although often depicted in the media as “monolithic” in their views, voting patterns or political behavior are anything but and there’s usually some diversity.  In political science, such divergences within defined groups are known as “cross-cutting cleavages”.

It’s used also of political systems in which a regime is structured (or run) with power is highly concentrated, typically in a single dictator or ruling party.  In such systems, usually there is little effective opposition and dissent is suppressed (although some of the more subtle informally tolerate a number of “approved dissenters” who operated within understood limits of self-censorship.  The old Soviet Union (the USSR (Union of Soviet Socialist Republics) 1922-1991), the Islamic Republic of Iran (1979-), the Republic of China (run by the Chinese Communist Party (CCP) (1949-) and the DPRK (Democratic Republic of Korea (North Korea) 1948-) are classic examples of monolithic systems; while the differences between them were innumerable, structurally all were (or are) politically monolithic.  The word is used also as a critique in the social sciences, Time magazine in April 2014 writing of the treatment of “Africa” as a construct in Mean Girls (2004):  “Like the original Ulysses, Cady is recently returned from her own series of adventures in Africa, where her parents worked as research zoologists. It is this prior “region of supernatural wonder” that offers the basis for the mythological reading of the film. While the notion of the African continent as a place of magic is a dated, rather offensive trope, the film firmly establishes this impression among the students at North Shore High School. To them, Africa is a monolithic place about which they know almost nothing. In their first encounter, Karen inquires of Cady: “So, if you’re from Africa, why are you white?” Shortly thereafter, Regina warns Aaron that Cady plans to “do some kind of African voodoo” on a used Kleenex of his to make him like her—in fact, the very boon that Cady will come to bestow under the monomyth mode.”  It remains a sensitive issue and one of the consequences of European colonial practices on the African continent (something which included what would now be regarded as "crimes against humanity) so the casual use of "Africa" as a monolithic construct is proscribed in a way a similar of "Europe" would not attract criticism.    

The limitations of the utility of the term mean it should be treated with caution and while there are “monolithic” aspects or features to constructs such as “the Third World”, “the West” or “the Global South”, the label does over-simplify the diversity of cultures, political systems, and ideologies within these broad categories.  Even something which is to some degree “structurally monolithic” like the United States (US) or the European Union (EU) can be highly diverse in terms of actual behavior.  In the West (and the modern-day US is the most discussed example), the recent trend towards polarization of views has become a popular topic of study and the coalesced factions are sometimes treated as “monolithic” despite in many cases being themselves intrinsically factionalized.

Kammback

Kammback (pronounced cam-bak)

A motif in automotive styling (originally dictated by wind tunnel findings during research into aerodynamic properties) in which rear of the car slopes downwards before being abruptly cut off to terminate in a vertical or near-vertical surface.  The things are known also as the Kamm tail (K-tail).

1950s (the actual design first appearing in 1938): The construct was Kamm + back.  The surname Kamm (related to Kamp) was of Germanic or Jewish (Ashkenazic) origin and translates literally from the German as “comb”.  The German comb was from the Middle High German kamb, kambe, kam & kamme and the Yiddish kam (comb).  Genealogists conclude Kamm was probably an metonymic occupational surname for someone who either made or sold combs, a common tool used for grooming or for textile work such as carding or combing wool.  There’s also the possibility the name of some Kamm clans could have been of topographic origin because in German, Kamm can also mean “ridge” or “crest” of a hill, mountain or some other elevation; it could thus have referred to someone who lived near such a geographical feature.  Less likely is that some arose from nicknames based on physical features or personal characteristics with Kamm used to describe someone with hair resembling a comb or someone with a sharp or distinctive personality.  The surname emerged in the Middle Ages, a time when hereditary family names were becoming more common in German-speaking regions and in addition to the presence in Germany, exists at various scale in areas with a historic patter of German migration (notably the north-eastern US and South Australia.

Back was from the Middle English bak, from the Old English bæc, from the Proto-West Germanic bak, from the Proto-Germanic bakam & baką which may be related to the primitive Indo-European beg- (to bend).  In other European languages there was also the Middle Low German bak (back), from the Old Saxon bak, the West Frisian bekling (chair back), the Old High German bah and the Swedish and Norwegian bak; there are no documented connections outside the Germanic and in other modern Germanic languages the cognates mostly have been ousted in this sense by words akin to Modern English ridge such as Danish ryg and the German Rücken.  At one time, many Indo-European languages may have distinguished the horizontal back of an animal or geographic formation such as a mountain range from the upright back of a human while in some cases a modern word for "back" may come from a word related to “spine” such as the Italian schiena or Russian spina or “shoulder”, the examples including the Spanish espalda & Polish plecy.

Tail was from the Middle English tail, tayl & teil (hindmost part of an animal), from the Old English tægl & tægel (tail), from the Proto-Germanic taglaz & taglą (hair, fibre; hair of a tail) (source also of the Old High German zagal, the German Zagel (tail), the dialectal German Zagel (penis), the Old Norse tagl (horse's tail) and the Gothic tagl (hair), from the primitive Indo-European doklos, from a suffixed form of the roots dok & dek- (something long and thin (referring to such things as fringe, lock of hair, horsetail & to tear, fray, shred)), source also of the Old Irish dual (lock of hair) and the Sanskrit dasah (fringe, wick).  It was cognate with the Scots tail (tail), the Dutch teil (tail, haulm, blade), the Low German Tagel (twisted scourge, whip of thongs and ropes; end of a rope), the dialectal Danish tavl (hair of the tail), the Swedish tagel (hair of the tail, horsehair), the Norwegian tagl (tail), the Icelandic tagl (tail, horsetail, ponytail), and the Gothic tagl (hair). In some senses, development appears to have been by a generalization of the usual opposition between head and tail.  The Oxford English Dictionary (OED) suggest the primary sense, at least among the Germanic tongues, seems to have been "hairy tail," or just "tuft of hair," but already in Old English the word was applied to the hairless "tails" of worms, bees etc.  The alternative suggestion is that the notion common to all is that of the "long, slender shape."  It served as an adjective from the 1670s.  A long obsolete Old English word for tail was steort.  Kammback is a noun; the noun plural is kammbacks.  No lexicographer seems to have listed Kammbackesque, Kammbacklike or Kammbackish as standard adjectives but, given the extent of the deviances from Professor Kamm's original which are still labelled as “Kammbacks”, they might be useful forms.  Who wouldn't want to be able to use terms like the comparative “more Kammbackish” and the superlative “most Kammbackish”?

Some notable Kammbacks

The Kammback (also known as the Kamm tail) was named after German engineer & aerodynamicist Professor Wunibald Kamm (1893–1966) who during the 1930s pioneered the shape, his work assisted greatly by some chicanery within the Nazi military-industrial complex which enabled the FKFA (Forschungsinstituts für Kraftfahrwesen und Fahrzeugmotoren Stuttgart (Research Institute of Automotive Engineering and Vehicle Engines Stuttgart) institute he established in 1930s to secure funding to construct a full-sized wind tunnel equipped with a two-part steel treadmill in the floor and an 8.8 metre (350 inch) diameter axial fan, able to drive air at up to 400 km/h (250 mph).  What the two concentric floor turntables allowed was that as well as enabling turbulence to be studied from the side on the running steel belt, slip angles were also possible.   At the time, it was the most modern structure of its kind on the planet, the very existence of which was owed to the priority afforded by the Nazis to re-armament, especially the development of modern airframes, most of the money eventually coming from the Reichs-Luftfahrt-Ministerium (RLM, the State Air Ministry).

A classic Kammback on a 1970 Fiat 850 Coupé (1965-1973), one of the last of the generation of post-war mainstream rear-engined cars built in Western Europe.

While Professor’s Kamm’s work on automobile shapes continued, increasingly the facility became focused on military contracts, contributing to an extraordinary range of novel aircraft designs, some revolutionary and most of which would never reach production.  All of this ceased in July 1944 when the facility was severely damaged in air-raids by Royal Air Force (RAF) Bomber Command, a costly campaign in which one mission incurred a loss-ration of 20% and it wasn’t until the late 1940s that reconstruction began after it was acquired by Daimler-Benz AG which enlarged and modernized the machinery, the early fruits including the 300 SL (the W194, first gullwing coupé) which won the 1952 Le Mans 24 hour race and the W196R “streamliner” Grand Prix race cars which created such a sensation in 1954.  Although he wasn’t part of “Operation Paperclip” (the US project which secured (by various means including the military “smuggling” them into the country despite many being wanted by those investigating war crimes and crimes against humanity) Professor Kann was acknowledged as one of the world’s leading authorities on turbulence and between 1947-1953 was part of the team working at Wright-Patterson Air Force Base in Dayton, Ohio.  Some of what was undertaken then remains classified but it can be assumed it was all related to military projects and what would later become the space program.

The Kammback which really wasn't: 1976 Chevrolet Vega Kammback.

One often misunderstood aspect of the Kamm tail is that the aerodynamic benefits are realized only if the flat, vertical surface created was no more than about 50% of the total area of the vehicle (as viewed directly from the back).  That’s why even designs which don’t conform to the requirements are often casually referred to as “Kammbacks” and in the US, Chevrolet were cynically opportunistic when the Vega range (1970-1977) included what was nothing more than a two-door station wagon (estate), it was named “Vega Kammback”.  Actually, even the existence of the thing in the US was unusual because at that stage, General Motors (GM) really “didn’t like” small station wagons but many critics did agree the Kammback was the best looking of the Vega’s body-styles.

2023 Ford Mustang coupe (left) and convertible (right).  Three of the Mean Girls (2004) ensemble (Karen Smith (Amanda Seyfried (b 1985)), Gretchen Wieners (Lacey Chabert (b 1982)) & Cady Heron (Lindsay Lohan (b 1986)) in 2023 filmed a commercial for Pepsi Corporation, one of the props a 2023 Ford Mustang convertible.  So ubiquitous has the Kammback become that its now unnoticed (except in its absence), one quirk being that when convertibles are created from such a base, many of the aerodynamic advantages are lost, one reason why (all else being equal which is rarely the case) a convertible will tend to have slightly inferior performance and slightly higher fuel consumption.

The knowledge gained from aero-engine development during World War I (1914-1918) meant even the mainstream engines of the 1920s were developing much more power so the speeds of cars were rising.  Some intrepid types also took advantage of the number of huge, powerful aero-engines being sold cheaply as “war surplus”, installing them is powerboats and racing cars, resulting in some fast machines and not a few fatalities.  However, it became clear the law of diminishing returns applied as speeds rose because while an increase of 100 horsepower might make possible an increase in top speed from 100 to 120 mph, another 100 hp might yield only another 10 mph; wind resistance increasing too much for the power to overcome.  Thus the interest in aerodynamics, then usually called “streamlining” something which, coincidently, produced some memorable art deco designs buy the engineers were interested in higher speeds and lower fuel consumption for a given quantum of energy input (fuel consumption).

2014 Shelby American Cobra 427 50^th Anniversary Edition in aluminium (left) and 1964 Shelby Daytona Coupe (right).

The AC Shelby Cobra (1962-1967) was small, light and powerful which made it an instant success on the race tracks but, ruggedly handsome though it was, its aerodynamics limited the top speed and on the some fast, open European circuits it gave away as much as 50 km/h (30 mph) to less powerful but more streamlined machines.  More power wasn’t the solution but a new Kammback body was and the Daytona duly won its class in the 1965 World Sports Car Championship.  All used the 289 cubic in (4.7 litre) Ford Windsor V8 although one briefly was fitted with a 390 (6.5) FE V8 and the planned 427 (7.0) version (CSX3027, the so-called “Daytona Super Coupe”) was never completed until sold by Shelby some 17 years later in a “rummage sale”.  The Kammback Daytona was the work of US designer Pete Brock (b 1936) and in a macabre coincidence, his namesake, the Australian racing driver Peter Brock (1945–2006) was killed while competing (in retirement) in a replica Daytona Coupe during the now defunct Targa West (2005-2021) in Western Australia.

Before the Kammback, the state of the aerodynamic art was the airship-like "streamliner" which, although it probably didn't cross the engineers' minds, owed something to the train of a bride's gown.  1939 Lincoln Zephyr V12 Coupe (left) and 1937 Mercedes-Benz 540K (W29) Special Roadster (originally delivered to Mohammad Zahir Shah (1914–2007; the last King of Afghanistan 1933-1973) (right).

What soon became clear was that the shape of the dirigible (better known as the “airship” or “blimp”) was close to ideal and needed to be tweaked only by honing it into a “teardrop shape” with a rounded nose, extending to a long, tapered tail, a shape which in the 1930s caught the imagination of designers who rendered some memorable designs although the most famous were impractical and inefficient in terms of packaging, thus suitable only for the then small market niche which sought speed.  It was to try to gain the benefits of streamlining in a shape more suitable for mass production that Professor Kamm and others took their slide-rules to the wind tunnel began to experiment.  The solution which emerged was to terminate the lovely, long flowing roofline with an abrupt end at a surface which was either vertical or close to it, an unexpected benefit being an improvement in high-speed stability, obviating the need for (a usually central) stabilizing fin (a la an aircraft’s tail).  By 1938, BMW had produced a car with a Kammback and although World War II (1938-1945) interrupted development by the late 1940s the shape had begun to appear in showrooms and in little more than ten years it was common in specially bodied racing cars.  That didn’t mean the allure of the teardrop went away because the aerodynamicists (who now had both access to bigger wind tunnels in which higher speeds could be tested and the novelty of computers which could process previously unimaginable quantities of data) could still prove ultimate slipperiness could be attained only with the teardrop.

Pre-Kammback & non-Kammback.  Porsche 917LH (Langheck (long tail)) at Arnage, Le Mans 24 hour, 1969 (left) and 2020 McLaren Speedtail (right).  Such things are now possible.

It was this which convinced Porsche to use such a tail on their revolutionary 917 in 1969 and having encountered no stability issues on their test track, sent the car to the circuits where it proved as fast as expected.  Unfortunately, the size of the Porsche test facility limited the 917 to 290 km/h (180 mph) and when on the long straights of some European circuits when speeds exceeded 320 km/h, it was clear the thing was lethally unstable.  Although the drivers killed at the wheel of the early 917s didn’t die at such velocities, it was understood it would be only a matter of time so the rear bodywork was redesigned.  When in 2018 McLaren returned to the teardrop for the “Speedtail” (a car which sacrificed just about anything not mandated by law in the quest for top speed), it was able to achieve a safe (it’s a relative term) 400 km/h (250 mph) because advances in aerodynamics, computing, materials & hydraulics had made such things possible although the packaging inefficiencies remained, something not significant for the target market.

Sqound

Sqound (pronounced skwu-kuhl)

An object in the shape of a square with rounded corners.

1990s: The word was coined by a person or persons unknown to distinguish between the (round) taillights used on (most) C4 Chevrolet Corvettes between 1983-1989 and those built subsequently (1990-1996), the construct being sq(uare) + (r)ound).  Square was from the Middle English square, sqware & squyre, from the Old French esquarre & esquerre, (which endures in modern French as équerre), from the Vulgar Latin exquadra, the construct being ex- (the prefix used as an intensive) +‎ quadro (four cornered; make square), from quadrus (square).  It displaced fēowerecge (four-edged).  Round was from the Middle English round & rounde, from the Old Northern French roünt & rund & the Old French ront, runt & reont (which endures in modern French as rond), from the Late Latin retundus & the Classical Latin rotundus.  The noun developed partly from the adjective and partly from the corresponding French noun rond.  Sqound is a noun & adjective; the noun plural is sounds.

1993 Chevrolet Corvette ZR1.

Perhaps the ultimate “niche word”, the only known use is among members of the “C4 ‘Vette cult” (those devoted to the fourth series (C4) Chevrolet Corvette, 1984-1996).  It seems first to have been used as an adjective to describe the then unique taillights fitted to the Corvette ZR1 (1990-1995), released at the 1989 Geneva Motor Show.  Although an obvious visual clue, the ZR1 attracted most attention by its use of an all-aluminium, 350 cubic inch (5.7 litre; LT5) V8 which featured double overhead camshafts (DOHC) and 32 valve heads.  Although the 350 cubic inch displacement was shared with the mainstream small-block Chevrolet V8s, so different was it in terms of construction and internal dimensions that the Corvette community (a priesthood with very firm views) regard it as something separate from the long-running (1954-2003 in production vehicles but still available as a "crate engine") small-block V8 family.  The engine was a co-development between Chevrolet and the UK-based Lotus Group which General Motors (GM, Chevrolet’s parent corporation) had acquired in 1986 (maintaining ownership until 1993) and was intended for use in a Corvette which could be marketed as the “world's fastest production car” (GM defining what constituted “production”); the V8 was given the internal designation LT5.  Although in the mid-1980s electronic engine management systems were still in their infancy, the LT5 did feature some genuine innovations in its fuel management, enabling the combustion chamber design to be optimized for power without this imposing the usual compromises in drivability at lower speeds.  Assembly of the (relatively) low-volume LT5 was sub-contracted to Mercury Marine which had long experience of the materials used in the construction.

LT5 V8 in 1990 (believed built in 1989) Chevrolet Corvette ZR1, one of 25 GM R&D (research & development) prototypes built to test the active-suspension system.

Perhaps of greater significance to GM was the expertise Lotus possessed in chassis design & tuning although the Corvette was a very different machine to the smaller, lighter cars with which Lotus had built their reputation, encapsulated by the philosophy of company founder Colin Chapman (1928–1982): “Simplify, then add lightness”.  Historically, that idea was most “un-Corvette” like and despite the aluminium engine block and heads, the ZR1 did emerge from development weighing some 200 lb (91 kg) more than the typical C4 Corvette, the additional heft the consequence of weightier components needed to support the greater speed and lateral forces made possible by the additional power and cornering capability.  On the road, the Lotus influence was certainly felt, the ZR1’s limits of adhesion as impressive as the then impressively wide (315-35 x 17 inch) tyres would suggest.  Befitting its role, the ZR1 was offered only as a coupé with a removable roof panel (no convertibles were produced) and as well as the wider wheels, it was distinguished from the rest of the range by a widened tail section with a convex rear fascia housing four “squond” taillights, the first time since the 1961 models anything but four round units had appeared on a production Corvette.

1987 Chevrolet Corvette with the round taillights used between 1984-1990 (left) and 1993 Chevrolet Corvette ZR1 with sqounds.

The ZR1 was much admired although not all approved of the squonds.  However, Chevrolet’s stylists must have liked them because in 1990 the convex fascia and squonds were standardized across the range, presumably pleasing the accountants who probably never saw the point of producing two different moldings which fulfilled the same function.  Why the C4 cultists settled on “sqound” isn’t known but it’s likely to have been something which just “came to someone” searching for a word to describe a shape which was neither quite round or square; within the cult there is (as far as in known), no “linguistics & etymology” committee.  In 1990, there was no world wide web and the internet was almost unknown outside of universities and places like the Pentagon so it wasn’t as if Google was there to answer the question.  Had search engines been available, it’s likely sqound might never have been coined because the word “quartic” quickly (as least as quickly as a 2400 kbit/s modem on a dial-up connection permitted) would have been unearthed.

1960 Plymouth Fury four-door hardtop (left), 1974 Austin Allegro 1750 Sport Special (centre) and 2024 Chevrolet Corvette Z06 coupé (right).

Once a technical term in the arcane world of algebra and thus known to only a few, "quartic" first gained a larger audience in 1973 when, to general derision, British Leyland (BL) released the Austin Allegro, complete with a steering wheel which was “not quite round and not quite square".  Explaining it was chosen to afford the diver greater leg-room and provide a better view of the instruments, BL revealed the shape was “quartic”.  The idea actually wasn’t novel, dating back decades and had been used on quite a few American cars during the early 1960s but for whatever reasons, the presence of one in the Allegro attracted little but criticism, something the rest of the vehicle would soon suffer.  BL also attracted the scorn of mathematicians who hastened to point out a quartic is “an algebraic equation or function of the fourth degree or a curve describing such an equation or function” insisting the correct description for a "square with rounded corners" is “squircle” (in algebraic geometry "a closed quartic curve having properties intermediate between those of a square and a circle"), the construct being squ(are) +c(ircle).  Few etymologists (and certainly no lexicographers) appear to have listed sqound as a "real" word but it's of interest because as a rare example in English of a word where a "q" is not followed by a "u"; such constructs do exist but usually in the cases where initialisms have become acronyms such as Qantas (Queensland and Northern Territory Aerial Services).  Such words do appear in English language texts but they tend to be foreign borrowings including (1) qat (or khat) (a plant native to East Africa and the Arabian Peninsula, often chewed for its stimulant effects), (2) qi (a term from Chinese philosophy referring to life force or energy), qibla (the direction Muslims face when praying (towards the Kaaba in Mecca)) and (4) qiviut (the soft under-wool of the musk-ox, valued when making warm clothing).  For a while, BL pretended to ignore the geometry pedants but within a year replaced the wheel with a conventional circular design.  Whatever the name, variations of the shape have since become popular with high-end manufacturers, Ferrari, Aston-Martin, Lamborghini and others all pursuing non-circular themes and one is a feature of the latest (C8) mid-engined Chevrolet Corvette, in which, unlike the unfortunate Allegro, it's much admired.

The antipodean Edsel: 1973 Leyland P76 Super V8 (left) and 1974 Leyland Force 7V (right).  Only 10 of the prototype Force 7V coupés survived the crusher but although it offered the novelty of a hatchback, the styling was ungainly and the very market segment for which it was intended was close to extinction.  Even had the range survived beyond 1974, success would have been improbable although the company should be commended for having intended to name the luxury version the Tour de Force (from the French and translated literally as "feat of strength"), the irony, in retrospect, charming.     

Although 1973 was the last “good year” for the “old” UK economy and one during which British Leyland was looking to the future with some optimism, the corporation’s troubles that year with steering wheels were, in retrospect, a harbinger for what lay ahead.  In addition to the Allegro, also introduced in 1973, on the other side of the planet, was the P76, a large (then a “compact” in US terms) sedan which Leyland Australia hoped would be competitive with the then dominant trio, GMH’s (General Motors Holden) Holden, Ford’s Falcon and Chrysler’s Valiant, the previous attempts using modified variants of UK models less than successful.  Leyland at the time kept expectations low, claiming the target was nothing more than a 10% market share and the initial reception the P76 received suggested this might more than be realized, the consensus of press reports concluding the thing was in many aspects at least as good as the opposition and in some ways superior, the country’s leading automotive that year awarding the V8 version the coveted COTY (Car of the Year) trophy.  Unfortunately, the circumstances of 26 June 1973 when the P76 was launched didn’t last, the first oil crisis beginning some four months later which resulted in a spike in the price of oil which not only suddenly dampened demand for larger cars but also triggered what was then the most severe and longest-lasting recession of the post-war years.  Basic design flaws in the body engineering and indifferent quality control contributed to the debacle which is now remembered as the Australian industry’s Edsel and in October 1974 production of the P76 ended and Leyland closed its Australian manufacturing facilities, never to re-open.

1973 P76 with the original sharp-edged steering wheel (left) and the later version, designed for the Force 7 (right).  The P76's steering wheel was one of many flaws which were planned to be rectified (or at least ameliorated) in the "facelifted" version scheduled for 1975 but before the end of 1974 the decision had been taken in London to axe the entire Leyland Australia project.    

Given the geo-political situation, rampant inflation and troubled industrial relations of the time, the P76’s steering wheel is really just a footnote in the sad tale but, like the Allegro’s “quartic” venture it was emblematic of the self-inflicted injuries to which Leyland would subject itself, both in the UK and its antipodean offshoot.  When the P76 made its debut in 1976, there was some comment that the steering wheel’s boss had a horn-pad in the shape of a boomerang, emphasizing the Australian connection but what was criticized was the rim which had a bizarre, concave cross-section, meaning a quite sharp edge faced the driver, leaving an impression on the palms of the hands after only a few minutes driving; it wasn't comfortable and those selling steering wheel covers did good business.  The industry legend is the shape was a consequence of the typist (in 1973 it was SOP (standard operational procedure) to blame women whenever possible) who prepared the final specification-sheet having mixed up “concave” & “convex” but even if that’s true it’s remarkable the obvious flaw in the design wasn’t rectified at the prototype stage.  Some have doubted the veracity of the story but such things do happen.  On 23 September, 1999, NASA (National Aeronautics and Space Administration) lost the US$125 million Mars Climate Orbiter spacecraft after its 286-day journey to Mars and that was a time when US$125 million was still a lot of money.  There was of course the inevitable review which found the craft’s directional thrusters had, over the course of several months, been incorrectly fired because the control data had been calculated in incorrect units.  The contractor Lockheed Martin (responsible for the calculations) was sending data in Imperial measures (pounds) to NASA, while NASA's navigation team, expecting metric units, interpreted the numbers as Newtons).  As far as is known, neither the contractor nor the agency attempted to blame a typist.

Picture of Lindsay Lohan in sqound frame (frame by Hanna Zasimova) (left) and sqound headlight surrounds on 1971 VG Chrysler Valiant VIP (right).  Passing usually unnoticed, sqounds are all around us although the mathematicians insists the shape is neither a sqound nor a quartic but a squircle.

Usufruct

Usufruct (pronounced yoo-zoo-fruhkt, yoo-soo-fruhkt, or yoos-soo-fruhkt)

In Roman and Civil Law (also used figuratively), a right to enjoy the advantages (use and derive profit) derivable from the use of property belonging to another, as far as is compatible with the substance of the thing not being destroyed, damaged or injured.

1620–1630: From the Late Latin ūsūfrūctus, the construct being ūsū (ablative of ūsus (use) + frūctus (enjoyment of (the fruits of something)) from the primitive Indo-European root bhrug- (to enjoy) (derivatives of which were used to refer to agricultural products).  It was cognate with the French usufruit, the Italian usufrutto & usofrutto, the Occitan usufrug, the Portuguese usufruto and the Spanish usufructo. The Latin form used in documents in legal proceedings was usus et fructus (use and enjoyment) and in English, use of usufruct was preceded by the now obsolete late fifteenth century delatinized form usufruit.  Usufryct is a noun & verb, usufruction is a noun, usufructing & usufructed are verbs and usufructuary is a noun & adjective; the noun plural is usufructs. 

In legal systems based on the Roman civil law codes, usufruct was the (inherently temporary) right to the use and enjoyment of the property of another, provided the character of the property remained unchanged (ie no destruction, damage or injury).  The legal doctrine interacted with other aspects of Roman law and usus et fructus applied not only to property as now conventional understood but was widely used also in administering the determination of property interests between a slave held under a usus fructus bond and a temporary master, the most obvious implication being any property acquired by a slave as a result of his labor was legally the property of the master.  Modern civil-law systems recognize two classes of usufructs.  A “perfect” usufruct includes only those things that a usufructuary (one who holds property under right of usufruct) can use without changing their substance (typically land, fixed, permanent structures) although the operation of natural forces (floods, earthquakes et all) may affect alterations.  A quasi- (ie “imperfect) usufruct includes property that intrinsically is consumable or expendable (money, perishable agricultural products et al) which would be of no advantage to the usufructuary if they could not be consumed, expend or in substance changed.

Under a usufruct agreement, the usufructuary (the one in whom the right is vested) is entitled to use the property and derive benefits from it (typically sub-leasing space or harvesting crops), but (1) gains no title to the property itself, (2) must to the extent reasonably possible preserve its substance and (3) eventually return it to the “naked owner” (the one possessing valid legal title) upon the expiry of the term of usufruct (which can be for a specific term or tied to the lifetime of the usufructuary.  In modern use, usufruct arrangements can apply not only to land & buildings but also to financial assets and instruments such as stocks, treasury paper (notes, bills & bonds) and cryptocurrency.  As populations age, lawyers expect an increasing number to be registered as contracts as a way of formalizing (ie bullet-proofing) clauses win wills which upon death, pass title in a property to a child, subject to the right of a surviving spouse to live in the property until their death, at which point the title becomes unencumbered and the child may deal with the property.

In 2012, Lindsay Lohan, travelling on the Pacific Coast Highway in Santa Monica, California, was involved in a crash between her (rented) Porsche 911 (997) Carrera S and an eighteen wheeler truck.  As one would suspect in such an unequal contest, the Porsche was badly damaged.

In some common law jurisdictions, usufruct has been codified and added to statutes but elements of the doctrine also appear in contract law.  In a car rental agreement for example the a usufructuary (the one hiring the car) is subject to (an almost) perfect usufruct in that the terms require the vehicle to be returned at the end of contracted period in substantially to same state as when it was delivered, subject only to accepted “wear & tear” which (in this context) would include wear on the tyres and the odd stone chip in the paint.  At no point does title to the vehicle pass to the usufructuary who is in mere legal & lawful possession while the contract is afoot.  Of course, if the vehicle is damaged beyond acceptable “wear & tear” the usufructuary may be held liable, thus the compulsory provision of insurance in such contracts.

The word also came to interest both the modern environmental movement and some activist constitutional lawyers in the US culture wars.  It was Thomas Jefferson (1743–1826; US president 1801-1809) who in 1789 wrote: “Earth belongs – in usufruct – to the living.” By which he meant humans have a right use the resources of the planet for profit and the pursuit of happiness but not in such a way that is so exploitive or destructive that the lives of generations to come will be harmed.  Such a sentiment could have come from Greta Thunberg (b 2003).  According to some legal theorists, his explicit mention of the “living” implied that responsibility for what is and what is to be rests with those now alive, not the dead, thus the argument when interpreting the constitution, the US Supreme Court should be read the document with the twenty-first century more in mind than the eighteenth or nineteenth.