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Better Tempo, Rhythm & Timing - Mobile Golf Tempo Training App

Tempo, rhythm and timing are not the same:

Tempo refers to the speed of the swing (backswing and downswing until impact).

Rhythm refers to the speed change during the various phases of the golf swing movement. The goal is to swing with grace. So avoid that your swing becomes a series of movements. Get the feeling smooth, not jerky. All the parts of your swing must work together in harmony.

Timing is independent of rhythm and tempo; it refers to the succession of body and club movements, and that should happen in a proper sequence in order to deliver consistent results: hands → arms → shoulders/trunk → hips → legs → feet → feet → hips → shoulders/trunk → arms → hands.

The "Swing Ratio" refers to the ratio of the measured time in seconds it takes to make the backswing, to the measured time in seconds it takes to make the downswing until impact.

Unfortunately, everyone does not use these terms correctly.

A swing ratio of 3:1 means the backswing is three times as long as the downswing. This swing ratio can vary across club selection or shot type. For example, many touring pros use a swing ratio of 3:1 for their driver with a ratio of 2.1:1 when making their putts.

Mobile Golf Tempo training app is an effective and easy way for the tempo of the pros to take root in your swing. Any and all-level golfers can sync perfect timing in their swing. (...)"
golf  swing  movement  rhythm  reference  theory 
yesterday by eric.brechemier
andy's blog — Holdout reuse
"This is a summary of the core algorithm from Generalization in Adaptive Data Analysis and Holdout Reuse, which lets you reuse a holdout set without having to worry about overfitting. It’s also been published in Science as The reusable holdout: Preserving validity in adaptive data analysis. (...)

Thresholdout (...) is an algorithm which wraps your holdout set. It comes with a query budget B and a threshold T. Each time you query Thresholdout, it calculates the performance on the training set, performance on the holdout set, and random variables α,β.

1. If the performances on the two sets are within T+α of each other, then it returns the exact performance on the training set.

2. If the performances on the two sets differ by more than T+α, it returns the performance on the holdout summed with the random β. It also reduces the query budget B by 1.

You can repeat the above until the budget B reaches zero, at which point Thresholdout tells you you’ve exhausted your holdout set.

The idea is that every time you hit case (2), you learn something about how the holdout set differs from the training set. Just how much you learn depends on how heavily the threshold and the reported holdout performance have been randomized: the greater the variance, the less you learn. So by choosing the distributions of the random variables carefully, you can bound the probability of being able to overfit on the holdout before your budget runs out (theorem 22). (...)"
machine  learning  test  theory 
yesterday by eric.brechemier
D3 Graph Theory
D3 Graph Theory is project aimed at anyone who wants to learn graph theory. It provides quick and interactive introduction to the subject. The visuals used in the project makes it an effective learning tool.
algorithms  computerscience  d3js  graph  tutorial  d3  theory  interactive  explanation 
2 days ago by llimllib
V6: Color (Rob Weychert)
Rob Weychert рассказывает о своём подходе к работе с цветом с помощью простого набора переменных и модели HSL. Хороший параметрический способ управлять палитрой.
design  color  theory  CSS  coding  issue 
2 days ago by jvetrau
Spiral Dynamics: Mastering Values, Leadership and Change - Don Edward Beck, Christopher Cowan - Google Books
Spiral Dynamics introduces a new model for plotting the enormous economic and commercial shifts that are making contemporary business practice so complex and apparently fragmented. Focusing on cutting-edge leadership, management systems, processes, procedures, and techniques, the authors synthesize changes such as: Increasing cultural diversity. Powerful new social responsibility initiatives. The arrival of a truly global marketplace. This is an inspiring book for managers, co...
#spiral  dynamics  theory 
4 days ago by rebelline

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