Open items / next steps

  • Universal test: decide what to do about the parts that fail it - the tep's zero (now a defined number, 289;485 ta, but chosen from water), the lam (human eye), the vox's zero (human hearing). Keep them as human conventions, or redefine them?
  • Write the spec up as a proper document (LaTeX, Markdown or AsciiDoc)
  • Give short names to a few everyday multiples (food energy t↑op, pressure t↑pr) instead of changing the coherent derived units (proposed, not decided)
  • A body-rhythm name for the chime (2 h) to match blink / beat / breath? (sleep cycle is ~1.5-2 h)
  • A name for 0;01 day (10 minutes, 10 moments), the one digit of the time without one (hand 2 shows it). Rejected so far: breather (Primel; too close to breath), spell (Beers), dwell, twinkling. See Prior art
  • The blink clash with Primel (its blink is half ours): ask John Volan before 1.0, then keep, rename, or note it
  • Standard sizes: food energy labels (opus), clothing sizes; shoe sizes in digs (proposed, see Shoe sizes)
  • Name for 0;1 dig (≈ 0.84 mm, the new millimetre): lin, from Latin linea (a linen thread, a line); the old line was 1/12 inch, and watch and button sizes still use the French ligne. Needs a symbol exception: "li" is the lib
  • Cooking measures: teaspoon 0;004 cu, tablespoon 0;01 cu (= 3 tsp), cup 0;2 cu (= 20 tbsp), proposed
  • Same-name units within a few percent: say "paludal cup" in full where ambiguous (like UK pint / US pint), rather than a subscript p you can't hear
  • Rulers: the pencil-case 0;2 p and desk 0;3 p are in Everyday reference. Still open: board ruler (an ulna, 0;4 p, or a gress, 0;6 p) and the metre stick's replacement (1 p?)
  • Music: 12 semitones per octave is already dozenal. To investigate: tempo (a moment holds 40 beats; 60 bpm = 42 per moment, 120 bpm = 84 per moment), pitch (A = 440 Hz ≈ 108;9 per blink, 152.8 dec), frequency units, and note lengths
  • Time zones: review the 24-zone decision (see Daylight saving and time zones). An alternative to weigh: Rapoport's UTC-only clocks (clocks.dozenal.ca), with no zones at all - everyone uses one time, and each place notes the time its local noon falls
  • Typesetting points: 1 pt (1/72 in, 0.353 mm) ≈ 0;5 lin (0.350 mm), so a pica (12 pt) ≈ 5 lin. Keep a "paludal point" of 0;5 lin, or give type sizes in lin directly (12 pt ≈ 5 lin)?
  • Shortening gro: "gr" is the grain's symbol, and "go" is an everyday word ("per go" = per attempt). gro is the established DSA name, so keeping it is suggested. "Bigro" would also clash with the rule that big numbers group in threes (bimo = 10^6).
  • The wink (half a blink) was removed as too fast to be useful, though it equals TGM's Tim exactly. Check whether to reinstate it
  • Missing coherent units, to be named: frequency (per blink, 2.88 Hz; concert A = 108;9 per blink), resistance (imp/riv, 0.592 Ω), capacitance (onus/imp, 0.587 F), inductance (imp·blink/riv, 0.205 H), magnetic flux (imp·blink, 2.52 Wb), flux density (flux/pace², 1.20 T), absorbed dose (opus/lib, 17.5 Gy). Frequency first (music, mains, radio). Until the magnetic units have names, use SI's (tesla, weber, henry). Dose needs care: opus/lib is several times a lethal dose, so everyday doses need deep prefixes, and (as SI keeps the gray and the sievert apart) absorbed and equivalent dose need separate names so they can't be mixed up
  • Angles: plane angles are in turns, but K_cd still uses the steradian. Decide a unit of solid angle (the steradian, or a whole sphere as the turn's counterpart), name the unit of luminous flux (lam·sr, the lumen's counterpart), and say that the radian stays the coherent angle unit in physics formulas (E = ħω, arc length = radius × angle), with turns for everyday use
  • Money: a name for the 1/100; part of a dollar (see Money)
  • A speed unit for ships and aircraft, to replace the knot (see the navis in Length)
  • Drug doses: how they'd be written if medicine chose to switch (no one is forced to; mg stays meanwhile)
  • Rename the iter? It looks and sounds close to litre, and the US spelling liter is "l" + "iter", which will confuse things like fuel economy ("iters per liter"). Candidate: lapis (Latin, a stone: Roman milestones stood every 1,000 paces, and distances were given as "at the third stone"), so the meaning matches the size exactly. Against: "la" is the lam, so it would need ls (first and last letters); five letters; an awkward plural (lapides); people may shorten it to "lap", which clashes with a lap of a track; and "lapis" alone often means lapis lazuli. Rejected: trek (sounds hard going, and too Star Trek)