### John Cook

Shared publicly -Visualizing Zwicker's method of combining loudness, sharpness, roughness and fluctuation strength into a single annoyance metric

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John Cook

Works at Singular Value Consulting

Attended University of Texas at Austin

Lives in Houston, TX

28,831 followers|6,569,294 views

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Visualizing Zwicker's method of combining loudness, sharpness, roughness and fluctuation strength into a single annoyance metric

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Praise for functional programming. From https://youtu.be/hzf3hTUKk8U

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Matthew Calef

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FP makes me happy, but there was that one time I wanted to add a print statement and I either had to change a zillion function signatures or use utilities whose names made me feel bad about myself.

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There are basically four types of integral equations: Volterra and Fredhom, each of the first and second kind. Here's a chart to keep them straight.

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The Mittag-Leffler function generalizes the exponential function. Probability distributions based on the exponential function (exponential, Poisson) have Mittag-Leffler generalizations.

Just as the exponential function satisfies the differential equation y' = ay, the Mittag-Leffler function satisfies the analogous*fractional* differential equation.

Just as the exponential function satisfies the differential equation y' = ay, the Mittag-Leffler function satisfies the analogous

The Mittag-Leffler function is a generalization of the exponential function. It leads to generalizations of the exponential and Poisson distributions.

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I heard someone say the other day that the advantage of formal software validation methods is that they let you explore the corners, cases where intuition

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There are two units of loudness in common use: phon and sone. The relation between them is complicate by a change in perceived sound intensity that happens around 40 dB. This page explains what the two units are, how to convert between them, and gives an online calculator for going from one to the other.

http://www.johndcook.com/phon_sone.html

http://www.johndcook.com/phon_sone.html

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"The idea that science demystifies the world, I just don't understand that. I feel that the deeper down the scientific rabbit hole I go, the bigger and grander and more magical the world seems." -- Stanford Gibson

As powerful as mathematical modeling can be, some things are most economical to study with analog models. These analog models still involve some math modeling.

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Robert Rambusch

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You can take the first derivative, second derivative, etc. of a function. What would it mean to take the 1.7th derivative or the πth derivative?

There are several ways to do this. The simplest approach, in my opinion, relies on Fourier transforms. This blog post looks at a more direct approach. It's more elementary but also a little more complicated.

There are several ways to do this. The simplest approach, in my opinion, relies on Fourier transforms. This blog post looks at a more direct approach. It's more elementary but also a little more complicated.

You can define a fractional derivative by defining fractional powers of the backward difference operator via the generalized binomial theorem.

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The stereotypical Lisp programmer is arrogant, but that may be based on a tiny biased sample of people who write about Lisp.

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Could you please tell us a little bit which industry use this programming language?

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Acoustic roughness is measured in aspers. Here's the reference value for 1 asper.

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A series of papers by +Brian Beckman on Kalman filtering and functional folds

A few weeks ago I started a series of posts on various things you could do with a functional fold. In the first post I mentioned that the idea came from a

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Bill Igoe

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Xool. Bookmark ed.

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Work

Occupation

Applied mathematician

Skills

Mathematical modeling, Bayesian statistics, software design, writing clear prose

Employment

- Singular Value ConsultingOwner, 2013 - presentI've consulted for some of the world's largest software and biotech companies, as well as for law firms and smaller companies.
- M. D. Anderson Cancer CenterResearch Statistician, 2000 - 2013Bayesian statistics, clinical trial design, simulation, software project management
- NanoSoftSenior consultantDesktop, web, and mobile software development
- Western AtlasSoftware developerDesktop software development, digital signal processing
- Vanderbilt UniversityAssistant professorResearch in nonlinear partial differential equations and modelling

Places

Currently

Houston, TX

Previously

Texarkana, TX - Nashville, TN - Austin, TX - Washington, DC

Contact Information

Work

Phone | (832) 422-8646 |

Story

Tagline

Connector

Introduction

I solve problems by making connections.

I work as a consultant, bringing together the experience I gained from my previous careers as a math professor, programmer, manager, and statistician. I enjoy combining ideas to solve problems and see the solutions carried out.

You can find out more about my work here.

I work as a consultant, bringing together the experience I gained from my previous careers as a math professor, programmer, manager, and statistician. I enjoy combining ideas to solve problems and see the solutions carried out.

You can find out more about my work here.

Education

- University of Texas at AustinPh. D. in Mathematics

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Male

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- Personal site (current)
- Code Project (current)