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[2026-10-12] · src BESIII, arXiv:2610.13097 (listing abstract read, full paper not; not yet refereed)
Using (2712.4 ± 14.4) × 10⁶ ψ(3686) events, BESIII reports a threshold enhancement in the π⁰π⁰ invariant-mass spectrum of ψ(3686) → π⁰π⁰J/ψ with significance above 10σ. A Breit-Wigner fit gives mass 274.3 ± 2.1 (stat.) ± 0.6 (syst.) MeV/c² and width 17.1 ± 1.5 (stat.) ± 0.5 (syst.) MeV.
The fitted mass sits only a few MeV above the 2m(π⁰) = 269.9 MeV threshold, so a narrow Breit-Wigner is a parametrisation of a near-threshold S-wave shape rather than evidence of a resonance; rescattering or final-state-interaction effects could produce the same line shape. What would settle it is the ππ scattering-length-constrained fit and the charged-pion channel, neither of which the abstract mentions. Treat it as a precise spectrum feature awaiting interpretation.
[2026-10-12] · src Bozier and Pickard, arXiv:2610.12563 (listing abstract read, full paper not; not yet refereed)
For the high-pressure hydride Mg₂IrH₆, the authors compute the Coulomb parameter from first principles and find μ = 0.62, giving a Morel-Anderson pseudopotential μ*_ME ≈ 0.39, against the conventional fixed value of 0.16. They estimate that this lowers the predicted Tc by roughly 40 K.
Predicted hydride Tc values mostly assume μ* = 0.1 to 0.16 and are tuned by the phonon side, so a calculated μ* more than twice that suggests some computational predictions are optimistic by tens of kelvin. It is a single-material calculation, not an experiment, and it does not address the reproducibility of measured room-temperature claims; it bears on how much to trust the predictions that guide which hydrides get synthesised.
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[2026-10-12] · src —
Trumpet takes today: three days since it was last assigned, the longest gap of the three, and a short session suits the chops better than a long one. The target is time feel. The last two trumpet days were scales and intervals, so this turns to Arban's Syncopation section, played in the middle register with single tonguing only. The Art of Phrasing melody is No. 30, the continuation of the sequence.
5 minutes: long tones on written C, G and low C, 8 counts each at quarter = 60, mp, starting each with a soft attack. Then 2 minutes of lip slurs, C to G and back, p. Listen for a centred tone that does not wobble at the ends of notes.
Take the first syncopation study in Arban's Syncopation section. Clap the rhythm first, then play it on one note at quarter = 60, then 72, then 84, then with the written pitches at 84. Success criterion: three consecutive clean passes at each tempo with the off-beat entries landing exactly where the metronome's click would sit if it were subdivided, and no rushing of the tied notes.
Play Art of Phrasing No. 30 twice: first straight, then with the phrase endings shaped so that each one tapers rather than stops. Aim for a line that leans into the long notes, carrying the time feel from the syncopation work into the melody.
About 25 minutes. Stop when the tone spreads, the attack gets fuzzy or the lips feel swollen, even if 84 is not reached; ten minutes early with a good sound beats ragged to the end. Finish with the Art of Phrasing melody at p, not with the fastest tempo.
[2026-10-12] · src —
hearChet Baker — My Funny Valentine · Tidal · Spotify
A trumpet melody played with almost no vibrato and a very soft attack, at a tempo slow enough that every note is exposed. Listen to how Baker places the long notes slightly behind the beat and lets the phrase endings fade out rather than cut off. That relaxed placement against the pulse is what the Art of Phrasing pass is aiming at today.
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[2026-10-12] · src DHS notice of proposed rulemaking, "Optional Practical Training Fees" (Federal Register; as summarised by Ogletree Deakins, Beltway Buzz, Oct. 9, 2026 — the notice itself was not opened, the Federal Register site refused the fetch)
DHS has proposed a rule under which a school would pay $70,000 the first time it recommends an F-1 student for any Optional Practical Training (OPT), and $30,000 for each later recommendation of that student. Fees would go to the U.S. Treasury. The proposal lets schools decide whether to pass the cost to students, to all students, or to employers. DHS says in the notice that without the fees the program "may shut down the program entirely." If finalised, the rule would apply prospectively, starting 60 days after the final rule is published. Comments are due November 9, 2026.
Date caveat: the secondary source says DHS issued the notice on October 10, but the Federal Register document it cites is dated October 8. Verify against the notice. Every figure above comes from that one secondary summary.
This is a proposal. Nothing is owed by anyone, and the text can change after comments. It is not known from this source what statutory authority DHS relies on to charge a fee of this size, or what DHS's cost basis is for the amounts; those are in the notice and should be read there.
Nobody is bound yet. If finalised as proposed, a school recommending an F-1 student for OPT would owe the fee from 60 days after publication, and would have to choose who bears it. The practical step available now is a comment by November 9. A final rule would also be open to challenge on its authority, but no such suit exists on this record.
[2026-10-12] · src Supreme Court order list of Oct. 1, 2026, as reported by SCOTUSblog (Oct. 2); the order list, case name and docket number were not opened
According to SCOTUSblog, the Supreme Court on October 1 agreed to hear a challenge to the administration's policy of detaining noncitizens apprehended inside the United States, as opposed to at the border, without a bond hearing. Argument is expected early next year. SCOTUSblog's report, as retrieved, does not give the docket number, the circuit decision under review, or the exact question presented, so those need the order list.
A grant of review decides nothing on the merits. It does not say the policy is lawful or unlawful. Whether it changes anything for people now detained depends on whether lower-court orders requiring bond hearings remain in effect pending decision. This record does not say.
Nothing changes on the grant alone. Rules for individual detainees remain whatever the lower courts have ordered, and the Court's merits ruling cannot come before the early-2027 argument.
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[2026-10-12] · src Typst release notes, 0.15.0 (2026-06-15)
Typst 0.15.0 (2026-06-15) lets a single document carry more than one
bibliography, so a thesis or a collected set of lecture notes can end each
chapter with its own reference list instead of one list at the back. The same
release adds a within selector, a divider element and an experimental
bundle export target that writes several output files from one source. The
release notes describe the feature; check the 0.15 bibliography reference for
the exact syntax before relying on a form remembered from here.
This removes one of the few structural reasons a long document went to LaTeX:
per-chapter bibliographies there mean biblatex with refsection or the
multibib package, and a second pass of the bibliography tool. The open
question is what happens to a citation that appears in two chapters, which
the release notes do not answer; test with one shared reference before
converting anything. For a single paper with one reference list this changes
nothing.
[2026-10-12] · src Typst reference, paragraph and text; Bringhurst, The Elements of Typographic Style, ch. 2 (rhythm and proportion)
Take any page of your own notes compiled with default settings, or a
\documentclass{article} page with \usepackage[margin0.75in]{geometry}= at
11pt on letter paper. Measure three things on the printed or zoomed page:
characters per line on a full line (count one, then trust it), the
baseline-to-baseline distance divided by the type size, and how many visually
distinct levels the headings, body and captions have.
Success criterion, all numbers: the measure sits between 60 and 75 characters;
the leading is 1.4 × the type size (15.4pt on 11pt type); and no more than
three levels are distinguishable, each by one change only (size, weight or
space, not all three). Fix the page by changing the margins or column width
first, then \linespread or set par(leading: ...), and re-count. Write down
the before and after numbers; if the measure was over 90, say which of the
two fixes (narrower text block, larger type) you chose and why.
The diagnosis transfers: counting characters per line and dividing leading by size takes a minute and works on every document you will ever be handed, including the next paper draft. Wide measure with tight leading is the most common reason a page of mathematics feels dense, which is the failure to look for first in your own notes.