Nadia Rahim is a RECATOOLS editorial persona focused on statistics and data literacy: what confidence intervals, averages, correlations and margins of error actually mean, and how they are misquoted. Articles under this byline trace each claim to the primary statistical literature and show the working, so readers can check a number rather than take it on trust.

About this byline

Nadia Rahim is a RECATOOLS editorial persona for statistics and data-literacy coverage. Articles are produced and reviewed under RECATOOLS editorial supervision.

Editorial responsibility for this byline rests with Jeffrey Tan (Tan Seng Fei), RECASYS, Singapore. Our Editorial Policy sets out how sources are reviewed, how AI-assisted workflows are used, and how editorial desks and personas are defined.

84
Articles
Science
Primary beat
Jul 2026
Writing since
~603 min
Total reading
All 84 Science 43 Statistics 22 Sustainability 18 AI & ML 1

Articles · Science Showing 31–40 of 43

A glass prism splitting a beam of white light into a visible spectrum, illustrating a report on low-loss optical waveguides fabricated on a silicon chip.
Science

Caltech Got Fibre-Grade Optical Loss Onto A Silicon Chip

Optical loss is what has kept chip-scale photonics far behind optical fibre. A Caltech group put the fibre material itself onto a chip using standard lithography, reaching quality factors above 180 million.

23 Aug 2026 · 8 min read
A macro photograph of a green circuit board, rows of small black integrated circuits and resistors in sharp focus across the middle and blurring towards the edges.
Science

Why a 1,000-Qubit Computer Has Zero Usable Qubits

Physical qubits and logical qubits are different currencies. At current error rates one logical qubit costs about 1,681 physical ones — so a thousand-qubit machine holds none at all.

18 Aug 2026 · 7 min read
A pyramid of old dice stacked five rows deep against a dark green background, each row showing a different pip count from six at the base up to a single worn blue die at the top.
Science

What Is a Qubit, Really?

A qubit is not a bit that is both values at once. We built a simulator and measured what actually separates one from a coin: a Bell pair disagreed on 0 of 100,000 shots, while the same qubits left uncorrelated disagreed 49,921 times.

18 Aug 2026 · 6 min read
A white cup of cappuccino dusted with chocolate sits on a saucer on a round metal tray, a spoon and a small biscuit beside it, with a person's folded arms resting on the wooden table behind, out of focus.
Science

What Actually Decides When Caffeine Wears Off

Coffee at four, still awake at midnight? The usual answer is that a substance is gone after ten half-lives — a tidy number that turns out to depend entirely on two things it never asks you for: how much you had, and how little counts as none. Same coffee, three different answers.

15 Aug 2026 · 7 min read
Laser-cut wooden tiles engraved with element symbols and numbers lie scattered across a pale table, with a few already slotted into the empty squares of a wooden periodic-table grid at the right.
Science

Why Isn't the Periodic Table Sorted by Weight?

The periodic table is not ordered by weight. Walk our own 118-element data from hydrogen to oganesson and the weight falls, rather than rises, in seven places — four of which are the reason the table is arranged by proton count, and three of which are an artefact of one column holding two different quantities.

15 Aug 2026 · 6 min read
Electrician's tools laid out on a bench with a stripped three-core cable showing bare copper conductors.
Science

Why the Voltage-Drop Limit Is Really an Efficiency Limit

The voltage-drop limit in every wiring code reads as a performance rule. The current cancels, so the share of power burned as heat in a cable run is exactly its percentage voltage drop — an identity we verified across 216 combinations. At the three per cent limit a 100-amp circuit dissipates 720 watts into the walls while fully compliant, and on one run we measured the rule removed 354.9 watts of permanent heat.

14 Aug 2026 · 6 min read
Gloved hands closing a vernier caliper around a length of timber, with its scale in view.
Science

Significant Figures: The Digits Your Calculator Invents

We audited our own science calculators against the precision their inputs actually justify. Across 768 multiplications and divisions the significant-figures rule held, failing only 4.4 per cent of the time. Subtraction is where it breaks: 60.8 per cent of 120 cases overstated the answer, and in one worked example the page shows three significant figures when the inputs justify none. The audit also found and fixed a real defect in our own display code.

13 Aug 2026 · 9 min read
A long-exposure photograph of a rocket launch at night, its exhaust drawing a bright curved arc across a starfield above a coastline
Science

Vietnam's First Privately Built Satellites Have a Ride

VinSpace has booked a SpaceX Transporter rideshare for 2027. Coverage calling these Vietnam's first home-built satellites is wrong - state engineers have flown four since 2013. What is new is who is paying.

13 Aug 2026 · 9 min read
Rows of young seedlings in small peat pots on a sunlit sill, lit from behind.
Science

What a Punnett Square Cannot Tell You

The square says three-to-one, and the lesson usually adds that in a family of four, three children will show the trait and one will not. We computed it exactly: that split turns up 42.2 per cent of the time, and 31.6 per cent of such families have no recessive child at all. You would need 120 offspring before the observed ratio reliably matched — a number fit for peas, not people.

12 Aug 2026 · 5 min read
A gibbous Moon photographed against black sky, its cratered surface picked out along the terminator — illustrative; the impact site described here is not visible at this scale.
Science

A Rocket Stage Hit the Moon. South Korea Was Overhead With a Camera.

Danuri made eight passes over the predicted impact point, starting half an hour early, with reference frames taken a month before. That is what makes it a measurement.

11 Aug 2026 · 7 min read
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