https://fibub.com/blog/ Guides, how-tos and research discoveries for fibub's free in-browser tools. en Tue, 10 Nov 2026 00:00:00 GMT https://fibub.com/blog/guides/vector-lab-3d/ https://fibub.com/blog/guides/vector-lab-3d/ Tue, 10 Nov 2026 00:00:00 GMT Tool guides What adding vectors, the dot product and the cross product mean in pictures, and how to find the angle and shortest distance between two lines in space. https://fibub.com/blog/discoveries/3i-atlas-interstellar-comet-hyperbolic-orbit/ https://fibub.com/blog/discoveries/3i-atlas-interstellar-comet-hyperbolic-orbit/ Tue, 10 Nov 2026 00:00:00 GMT Discoveries A 2025 open-access paper reports the discovery of 3I/ATLAS, a comet from another star on an orbit with eccentricity about 6. Here is how to check its speed with fibub. https://fibub.com/blog/discoveries/m-dwarf-binary-orbits-speckle-dynamical-masses/ https://fibub.com/blog/discoveries/m-dwarf-binary-orbits-speckle-dynamical-masses/ Tue, 10 Nov 2026 00:00:00 GMT Discoveries A 2026 open-access paper gives 54 orbits of nearby red dwarf pairs from speckle imaging, 28 of them new, with masses good to a few per cent. Check the maths with fibub. https://fibub.com/blog/discoveries/microcystis-malate-dehydrogenase-dual-coenzyme/ https://fibub.com/blog/discoveries/microcystis-malate-dehydrogenase-dual-coenzyme/ Tue, 10 Nov 2026 00:00:00 GMT Discoveries Malate dehydrogenase from Microcystis aeruginosa works with either coenzyme, preferring NAD about twelvefold. Here is how to get Km, kcat and that ratio from your own rates. https://fibub.com/blog/together/monthly-money-routine/ https://fibub.com/blog/together/monthly-money-routine/ Tue, 10 Nov 2026 00:00:00 GMT Using tools together A simple monthly routine that uses the budget calculator, the bill calendar and the weekly planner, with a worked example for a two-income household. https://fibub.com/blog/discoveries/toi-333b-neptune-desert/ https://fibub.com/blog/discoveries/toi-333b-neptune-desert/ Tue, 10 Nov 2026 00:00:00 GMT Discoveries A 2026 open-access paper reports TOI-333b, a planet about four times Earth's size that circles its star in under four days. Here is what the team found and how to test the maths with fibub tools. https://fibub.com/blog/discoveries/accelerated-shelf-life-high-pressure-sausages-arrhenius/ https://fibub.com/blog/discoveries/accelerated-shelf-life-high-pressure-sausages-arrhenius/ Tue, 10 Nov 2026 00:00:00 GMT Discoveries A 2025 study checked whether storing high-pressure-processed frankfurters warm can predict their chilled shelf life. Tests at 8 and 18 °C worked well. Here is how to fit Q10 and Ea yourself. https://fibub.com/blog/discoveries/active-layer-thickness-two-depths/ https://fibub.com/blog/discoveries/active-layer-thickness-two-depths/ Tue, 10 Nov 2026 00:00:00 GMT Discoveries A 2026 study in The Cryosphere estimates permafrost thaw depth from just two shallow temperature sensors, with no soil lab work. Here is how it works and how to try it. https://fibub.com/blog/discoveries/acwr-sprint-running-injury-risk-roc-professional-soccer/ https://fibub.com/blog/discoveries/acwr-sprint-running-injury-risk-roc-professional-soccer/ Tue, 10 Nov 2026 00:00:00 GMT Discoveries A 2025 study of 40 Greek professional footballers found that weekly load ratios for 15-20 km/h running and sprinting separated injured from uninjured players best. Here is how to test a load ratio with a ROC curve. https://fibub.com/blog/discoveries/age-based-maximal-heart-rate-equations-accuracy-fitness/ https://fibub.com/blog/discoveries/age-based-maximal-heart-rate-equations-accuracy-fitness/ Tue, 10 Nov 2026 00:00:00 GMT Discoveries A 2025 PLOS ONE study tested seven HRmax equations against treadmill tests in 230 adults. Typical errors were 7 to 10 beats/min, whatever the person's fitness. Here is how to check it. https://fibub.com/blog/discoveries/silver-thiogallate-mid-infrared-dispersion/ https://fibub.com/blog/discoveries/silver-thiogallate-mid-infrared-dispersion/ Tue, 10 Nov 2026 00:00:00 GMT Discoveries A 2026 open-access paper measures how the refractive index of the crystal AgGaS2 changes with wavelength out to 21 µm, without any infrared detector. Here is how, and how to fit dispersion data yourself. https://fibub.com/blog/discoveries/aglime-particle-size-rate-exchangeable-aluminium-romania/ https://fibub.com/blog/discoveries/aglime-particle-size-rate-exchangeable-aluminium-romania/ Tue, 10 Nov 2026 00:00:00 GMT Discoveries A Romanian field trial compared fine and coarse ground limestone at 3 and 6 t/ha on an acid soil. Here is what changed, and how to work out a lime rate yourself. https://fibub.com/blog/discoveries/al-zn-mg-cu-continuous-rheo-extrusion-grain-refinement/ https://fibub.com/blog/discoveries/al-zn-mg-cu-continuous-rheo-extrusion-grain-refinement/ Tue, 10 Nov 2026 00:00:00 GMT Discoveries A 2025 Metals study cut the grain size of an Al-Zn-Mg-Cu alloy from 53.5 to 16.1 µm by continuous rheo-extrusion and nearly doubled its yield strength. How much came from the grains? https://fibub.com/blog/discoveries/alsi10mg-layer-thickness-rotating-bending-fatigue-pbf-lb/ https://fibub.com/blog/discoveries/alsi10mg-layer-thickness-rotating-bending-fatigue-pbf-lb/ Tue, 10 Nov 2026 00:00:00 GMT Discoveries A 2025 Crystals study found that printing AlSi10Mg in 80 µm layers instead of 50 µm left bigger pores and cut the fatigue limit from about 70 to 15 MPa. https://fibub.com/blog/discoveries/oral-ex-vivo-biofilm-cfu-log-reduction/ https://fibub.com/blog/discoveries/oral-ex-vivo-biofilm-cfu-log-reduction/ Tue, 10 Nov 2026 00:00:00 GMT Discoveries Saliva and plaque from ten donors grew a layered biofilm on coverslips, and viable counts measured what rinses killed. Here is how to turn your own plate counts into CFU/mL and a log reduction with an interval. https://fibub.com/blog/guides/spinning-skater/ https://fibub.com/blog/guides/spinning-skater/ Tue, 10 Nov 2026 00:00:00 GMT Tool guides Understand conservation of angular momentum, moment of inertia and rotational energy with a skater who pulls her arms in, and a worked example. https://fibub.com/blog/discoveries/apple-watch-heart-rate-variability-ecg-agreement/ https://fibub.com/blog/discoveries/apple-watch-heart-rate-variability-ecg-agreement/ Tue, 10 Nov 2026 00:00:00 GMT Discoveries A 2025 open-access study compared pulse intervals from a smartwatch with a lab ECG in 78 adults. Agreement was close at rest and weaker after walking. Here is how to test that kind of claim yourself. https://fibub.com/blog/discoveries/asaoka-hyperbolic-settlement-prediction-dynamic-compaction/ https://fibub.com/blog/discoveries/asaoka-hyperbolic-settlement-prediction-dynamic-compaction/ Tue, 10 Nov 2026 00:00:00 GMT Discoveries A 2026 Technologies case study tested Asaoka, exponential and hyperbolic methods on a year of settlement at a Yangtze river port. Fit all three yourself in a browser. https://fibub.com/blog/guides/capital-gains/ https://fibub.com/blog/guides/capital-gains/ Tue, 10 Nov 2026 00:00:00 GMT Tool guides How the cost of shares you sell is worked out by average cost or first in first out, why the two can differ, and how to check your sales year by year. https://fibub.com/blog/discoveries/balkan-goat-microsatellite-genetic-diversity-serbia/ https://fibub.com/blog/discoveries/balkan-goat-microsatellite-genetic-diversity-serbia/ Tue, 10 Nov 2026 00:00:00 GMT Discoveries A 2026 study of Serbia's Balkan goat found high diversity and little inbreeding across 13 microsatellite loci. See how to test one locus for Hardy-Weinberg and compare flocks yourself. https://fibub.com/blog/discoveries/mechanochemistry-hypervalent-iodine-less-waste/ https://fibub.com/blog/discoveries/mechanochemistry-hypervalent-iodine-less-waste/ Tue, 10 Nov 2026 00:00:00 GMT Discoveries A 2026 review compared iodine(III) reactions done by ball milling with the same reactions in solution, and found the milled ones often made over ten times less waste. Here is how to check an E-factor yourself. https://fibub.com/blog/discoveries/nb-tizrhf-high-entropy-alloy-superconductor-ball-milling/ https://fibub.com/blog/discoveries/nb-tizrhf-high-entropy-alloy-superconductor-ball-milling/ Tue, 10 Nov 2026 00:00:00 GMT Discoveries A 2026 open-access study makes a niobium-rich high-entropy alloy by ball milling and finds superconductivity near 7 K with an upper critical field over 6 T. Here is how to check its numbers with free tools. https://fibub.com/blog/guides/banked-curve/ https://fibub.com/blog/guides/banked-curve/ Tue, 10 Nov 2026 00:00:00 GMT Tool guides How the normal force and friction keep a car on a banked curve, the ideal no-friction speed, the safe speed range, and a full worked example. https://fibub.com/blog/discoveries/beach-sand-grain-size-sorting-breakwaters-adriatic/ https://fibub.com/blog/discoveries/beach-sand-grain-size-sorting-breakwaters-adriatic/ Tue, 10 Nov 2026 00:00:00 GMT Discoveries A 2025 sieve study of 63 sand samples from two Italian beaches finds the berm is the best place to monitor human-modified beaches. Here is how to work out mean, sorting and skewness yourself. https://fibub.com/blog/discoveries/carnivore-occupancy-n-mixture-turkiye/ https://fibub.com/blog/discoveries/carnivore-occupancy-n-mixture-turkiye/ Tue, 10 Nov 2026 00:00:00 GMT Discoveries A 2025 PLOS ONE study ran occupancy and N-mixture models on camera-trap data for three carnivores in northeastern Türkiye. Here is how to try the occupancy half yourself. https://fibub.com/blog/discoveries/pv-panel-tilt-angle-latvia-autumn-winter/ https://fibub.com/blog/discoveries/pv-panel-tilt-angle-latvia-autumn-winter/ Tue, 10 Nov 2026 00:00:00 GMT Discoveries A 2025 Energies study measured south-facing panels at six tilts through a Latvian autumn and winter. See what it found, and compare tilts for any place in your browser. https://fibub.com/blog/guides/bill-calendar/ https://fibub.com/blog/guides/bill-calendar/ Tue, 10 Nov 2026 00:00:00 GMT Tool guides Learn how a monthly bill calendar with a running balance shows money gaps early, with a worked example and common mistakes. https://fibub.com/blog/guides/binding-energy/ https://fibub.com/blog/guides/binding-energy/ Tue, 10 Nov 2026 00:00:00 GMT Tool guides Why nuclei weigh less than their parts, how mass defect gives binding energy, and why fission and fusion both release energy. A clear guide to the binding energy lab. https://fibub.com/blog/guides/binomial-expansion/ https://fibub.com/blog/guides/binomial-expansion/ Tue, 10 Nov 2026 00:00:00 GMT Tool guides How the binomial theorem multiplies out (ax + b)ⁿ, where Pascal's triangle fits in, how to find the general and middle terms, and why a Galton board gives the same numbers. https://fibub.com/blog/discoveries/bladder-cancer-urine-test-cutoff-predictive-values/ https://fibub.com/blog/discoveries/bladder-cancer-urine-test-cutoff-predictive-values/ Tue, 10 Nov 2026 00:00:00 GMT Discoveries A 2025 open-access paper reads 1,243 used rapid urine test cassettes with a photometer and asks which cut-off balances sensitivity against precision. Here is how to rework that trade-off in your browser. https://fibub.com/blog/guides/energy-needs/ https://fibub.com/blog/guides/energy-needs/ Tue, 10 Nov 2026 00:00:00 GMT Tool guides How the energy needs calculator estimates resting and daily energy with Mifflin-St Jeor, two Harris-Benedict versions and Katch-McArdle, with a worked example in pounds and inches. https://fibub.com/blog/discoveries/brown-marbled-grouper-stock-status-saleh-bay/ https://fibub.com/blog/discoveries/brown-marbled-grouper-stock-status-saleh-bay/ Tue, 10 Nov 2026 00:00:00 GMT Discoveries A 2025 study of brown-marbled grouper in Saleh Bay, Indonesia, finds the stock below its spawning potential target. Here is how to explore fishing pressure with yield per recruit. https://fibub.com/blog/discoveries/perforated-cold-formed-steel-upright-buckling/ https://fibub.com/blog/discoveries/perforated-cold-formed-steel-upright-buckling/ Tue, 10 Nov 2026 00:00:00 GMT Discoveries A 2025 Buildings study crushed perforated steel pallet-rack uprights of three lengths and compared FEM, effective width and direct strength methods. See how slenderness changes the story. https://fibub.com/blog/discoveries/extremely-late-sown-winter-wheat-seeding-density-xinjiang/ https://fibub.com/blog/discoveries/extremely-late-sown-winter-wheat-seeding-density-xinjiang/ Tue, 10 Nov 2026 00:00:00 GMT Discoveries A two-year trial in northern Xinjiang sowed winter wheat in late October and November at four seed rates. Here is what it found, and how to work out a seed rate and check your stand. https://fibub.com/blog/discoveries/ccme-wqi-drainage-water-groundwater-karakalpakstan/ https://fibub.com/blog/discoveries/ccme-wqi-drainage-water-groundwater-karakalpakstan/ Tue, 10 Nov 2026 00:00:00 GMT Discoveries A 2025 study scored drainage water and well water in Karakalpakstan with the CCME WQI: drainage water rated Poor for irrigation, groundwater Fair for drinking. Here is how to score your own. https://fibub.com/blog/discoveries/cdin2se4-thin-film-band-gap-substrate-temperature/ https://fibub.com/blog/discoveries/cdin2se4-thin-film-band-gap-substrate-temperature/ Tue, 10 Nov 2026 00:00:00 GMT Discoveries A 2025 study grew 100 nm CdIn₂Se₄ films by pulsed laser deposition and found the optical gap rising from about 1.53 to 1.79 eV. Here is how to run the same Tauc analysis. https://fibub.com/blog/discoveries/cerrado-koppen-am-aw-shift-warming-drought/ https://fibub.com/blog/discoveries/cerrado-koppen-am-aw-shift-warming-drought/ Tue, 10 Nov 2026 00:00:00 GMT Discoveries A 2025 Atmosphere study classified 14 Brazilian savanna towns by Köppen over sliding 30-year windows and tested 60 years of warming and drying. Check the method yourself. https://fibub.com/blog/discoveries/chikungunya-foshan-2025-reproduction-number-doubling-time/ https://fibub.com/blog/discoveries/chikungunya-foshan-2025-reproduction-number-doubling-time/ Tue, 10 Nov 2026 00:00:00 GMT Discoveries A 2025 open-access study of the Foshan chikungunya outbreak estimated a doubling time of 3.5 days and a very high R0. Here is how to explore what those numbers mean. https://fibub.com/blog/kids/class-10-acids-bases-salts/ https://fibub.com/blog/kids/class-10-acids-bases-salts/ Tue, 10 Nov 2026 00:00:00 GMT For students Indicators, the pH scale, neutralisation and everyday salts for Class 10, with four free activities, safe kitchen experiments and quick self-check questions. https://fibub.com/blog/kids/class-8-electricity/ https://fibub.com/blog/kids/class-8-electricity/ Tue, 10 Nov 2026 00:00:00 GMT For students Which fibub activities to use for Class 8 electricity: electromagnets, the heating effect of current and fuses, with good habits and a safe home experiment. https://fibub.com/blog/discoveries/cobalt-doped-cdsse-quantum-dots-blue-shift/ https://fibub.com/blog/discoveries/cobalt-doped-cdsse-quantum-dots-blue-shift/ Tue, 10 Nov 2026 00:00:00 GMT Discoveries A 2026 study found that adding cobalt to CdSSe quantum dots shifts their absorption to the blue while the dots get bigger. Here is how to test that against the Brus equation. https://fibub.com/blog/guides/loan-comparison/ https://fibub.com/blog/guides/loan-comparison/ Tue, 10 Nov 2026 00:00:00 GMT Tool guides Why the lowest quoted rate is not always the cheapest loan, how fees change the APR, and what a flat rate really costs, with side-by-side offers. https://fibub.com/blog/guides/argand-plane/ https://fibub.com/blog/guides/argand-plane/ Tue, 10 Nov 2026 00:00:00 GMT Tool guides See complex numbers as points and arrows: addition as a parallelogram, multiplication as stretch and turn, and the complex roots of a quadratic. A plain guide to the Argand plane tool. https://fibub.com/blog/guides/compound-interest/ https://fibub.com/blog/guides/compound-interest/ Tue, 10 Nov 2026 00:00:00 GMT Tool guides How interest on interest builds savings, why fees and inflation matter as much as the rate, and how to model all three with the compound interest calculator. https://fibub.com/blog/guides/file-converter/ https://fibub.com/blog/guides/file-converter/ Tue, 10 Nov 2026 00:00:00 GMT Tool guides How in-browser file conversion works, which formats turn into which, what is kept and what is lost, with a worked JSON to CSV example and the common traps. https://fibub.com/blog/guides/gpa-converter/ https://fibub.com/blog/guides/gpa-converter/ Tue, 10 Nov 2026 00:00:00 GMT Tool guides Why one grade can look very different on another country's scale, how each conversion method works, and how to work out a credit-weighted GPA from your courses. https://fibub.com/blog/discoveries/corn-cob-hard-carbon-joule-heating-sodium-ion-anode/ https://fibub.com/blog/discoveries/corn-cob-hard-carbon-joule-heating-sodium-ion-anode/ Tue, 10 Nov 2026 00:00:00 GMT Discoveries A 2026 study flash-heated corn cob carbon for 40 s at 1300 to 1500 °C; the 1400 °C sample gave 263 mAh/g, 72 % first-cycle efficiency and 91 % retention after 300 cycles. https://fibub.com/blog/discoveries/creep-life-machine-learning-larson-miller-austenitic-steel/ https://fibub.com/blog/discoveries/creep-life-machine-learning-larson-miller-austenitic-steel/ Tue, 10 Nov 2026 00:00:00 GMT Discoveries A 2025 Metals study trained machine learning models on 216 creep tests of austenitic steels and found that predicting the Larson-Miller parameter beats predicting hours. https://fibub.com/blog/discoveries/rnf6-zika-tree-shrew-brain-endothelial-cells/ https://fibub.com/blog/discoveries/rnf6-zika-tree-shrew-brain-endothelial-cells/ Tue, 10 Nov 2026 00:00:00 GMT Discoveries A genome-wide screen in tree shrew brain cells put RNF6 at the top of the list of host helpers. Here is how to plan the same MOIs and titrate the stock yourself. https://fibub.com/blog/discoveries/crsb-altermagnet-spin-splitting/ https://fibub.com/blog/discoveries/crsb-altermagnet-spin-splitting/ Tue, 10 Nov 2026 00:00:00 GMT Discoveries A 2025 open-access study maps the spin-split bands of CrSb in three dimensions and confirms it is a g-wave altermagnet. Here is the finding, and how to run the symmetry test yourself.