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#frequency

3 posts1 participant0 posts today

Just published:

Supplementing CEFR-graded vocabulary lists for language learners by leveraging information on dictionary views, corpus frequency, part-of-speech, and polysemy

A machine-learning method to suggest word candidates for CEFR-graded vocabulary lists.

doi.org/10.1057/s41599-025-054

- We compare 4 machine-learning algorithms: Regression trees, ordinal logistic regression, random forests, & naïve Bayes
- All are better than a random baseline (approx. double the accuracy).
- From these we use random forests (2k trees) to impute the #CEFR level of previously unlabeled words

alojapan.com/1323627/study-rev Study reveals how age and gender influence dietary patterns in Japan #Cancer #diabetes #diet #Education #fish #food #Frequency #HealthyLiving #heart #Japan #JapanNews #meat #medicine #news #Nutrients #nutrition #obesity #research #Students #vegetables As the age-old proverb rightly states, “You are what you eat.” Our diet largely influences our health and well-being. A balanced diet lays the foundation for healthy living and disease preventio

I still recall the day several decades ago when I, as a young #ElectricalEngineering undergrad, was introduced to the concept of "negative #frequency". I was unsettled. I suppose my reaction to the idea of negative frequencies was like the Medieval mathematicians' reaction to Fibonacci's discovery of negative numbers. But after my head was properly bashed in by a couple of homework problems, this concept became as natural to me as the negative number and the negative time.

I am curious how civil, mechanical, and other engineering fields deal with the concept of negative frequencies.

Fish, Fish, Fish...

'The jamming avoidance response is a behavior of some species of weakly electric fish. It occurs when two electric fish with wave discharges meet – if their discharge frequencies are very similar, each fish shifts its discharge frequency to increase the difference between the two. By doing this, both fish prevent jamming of their sense of electroreception.'

en.wikipedia.org/wiki/Jamming_

en.wikipedia.orgJamming avoidance response - Wikipedia

The Fourier Transform is a mathematical operation that transforms a function of time (or space) into a function of frequency. It decomposes a complex signal into its constituent sinusoidal components, each with a specific frequency, amplitude, and phase. This is particularly useful in many fields, such as signal processing, physics, and engineering, because it allows for analysing the frequency characteristics of signals. The Fourier Transform provides a bridge between the time and frequency domains, enabling the analysis and manipulation of signals in more intuitive and computationally efficient ways. The result of applying a Fourier Transform is often represented as a spectrum, showing how much of each frequency is present in the original signal.

\[\Large\boxed{\boxed{\widehat{f}(\xi) = \int_{-\infty}^{\infty} f(x)\ e^{-i 2\pi \xi x}\,\mathrm dx, \quad \forall\xi \in \mathbb{R}.}}\]

Inverse Fourier Transform:
\[\Large\boxed{\boxed{ f(x) = \int_{-\infty}^{\infty} \widehat f(\xi)\ e^{i 2 \pi \xi x}\,\mathrm d\xi,\quad \forall x \in \mathbb R.}}\]

The equation allows us to listen to mp3s today. Digital Music Couldn’t Exist Without the Fourier Transform: bit.ly/22kbNfi

Gizmodo · Digital Music Couldn't Exist Without the Fourier TransformThis is the Fourier Transform. You can thank it for providing the music you stream every day, squeezing down the images you see on the Internet into tiny

FUN FACT: @frequency is based on a #Mastodon fork called #Decodon. It has the following modifications:

  • All accounts are locked/private, meaning content is only distributed to followers
  • Support for push notifications to Expo-based apps
  • Pre-signed URLs for extra-secure storage of uploaded private media
  • replies are treated more like comments and are filtered from the home feed
  • circles (lists of followers you can address posts to instead of only followers) - cherry-picked from fedibird
  • default “inner circle” for all accounts to get them started
  • more control over logo and branding in email templates

Like #Frequency, Decodon is also made by @jesseplusplus.