 May 2024

www.reddit.com www.reddit.com

Most typewriter shops did not use alcohol as it was ineffective and contained water. Industrial alcohols contained keytones and acetones that will melt plastic and remove paint.
Solvents for typewriters used in repair shops:  White mineral spirits with a squeeze bottle. (Sometimes also called Varsol, Stoddard's Formula, and possibly Inhibisol)  Naphtha (aka lighter fluid; used in Zippo lighters, and frequently seen in Europe). PB B'laster is essentially pressurized naphtha in a can.  Auto carb and brake cleaners, usually pressurized in a can. These usually have acetone in them and will melt plastic. Will remove WD40 if accidentally used on a typewriter.
For cleaning typeslugs, one can use naphtha or mineral spirits with a brass bristle brush.
For platen cleaning try mineral spirits or fedron.
Only oil the carriage rails for the bearings or trucks.
(This is all colloquial advice, albeit with experience, so check specific facts about what certain products contain.)

You will notice that manual was printed in 1920. Gas was the only cleaner available then. In just one more year in 1921 Stoddards Formula was invented (Varsol) for the dry cleaning business. Everything changed then and Varsol was the cleaner of choice.
should find a better reference

 Mar 2024

www.youtube.com www.youtube.com

LOL. stupid shit. only the multiplication of scalar values is always defined.<br /> multiplying two nonscalar values is defined only in some cases, and certailnly not for money.<br /> multiplying two lengths (1 meter x 1 meter) only works, if the two lenghts are orthogonal... idiots
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 Nov 2023

www.econometricswithr.org www.econometricswithr.org

σ2^β1=1nVar[(Xi−μX)ui][Var(Xi)]2.
This formula is wrong. It should be as follows: $$Var(\hat{\beta}1) = \frac{\sum{i=1}^N Var(x_i  \bar{x})^2 u_i}{(Var(\sum_{i=1}^N (x_i  \bar{x})^2))}$$
Otherwise, $\sigma_{\hat{\beta}_1}$ is different for each $u_i$.

 Aug 2023

engineering.universe.com engineering.universe.com

def rating(like_count, angry_count) like_count * 2  angry_count end


math.stackexchange.com math.stackexchange.com

so a formula is like a dead equation?

 Dec 2021

blogs.dickinson.edu blogs.dickinson.edu

average sentence complexity
Formula: total # of punctuation marks used / total # of sentences

average sentence length
Formula: total # of words / total # of sentences

average line length
Formula: total # of words / total # of lines

hapax legomena ratio
Formula: # of words that appear exactly once/total # of words

typetoken ratio
Formula: total # of distinct words / total # of words

 Apr 2021

www.biorad.com www.biorad.com

Formula for Calculating Concentration

 Sep 2020
 Oct 2019

understandinguncertainty.org understandinguncertainty.org

probability compounds
compound probability = 1  (1  annual probability of excedence)^n where:
 annual probability = 0.01
 n = exposure period = 10 years
by other hand Mean Recurrence Interval  MRI = Return Period = 1 / annual probability of exceedence, but only if MRI >= 10 years, if not then:
annual probability of excedence = 1e(1/MRI)
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 Mar 2019

www.colciencias.gov.co www.colciencias.gov.co

Indicador de cohesión del grupo (IC
Si el grupo tiene un investigador que no produce, el resultado será inferior. Hay una relación entre el autor y sus productos.

2.7.Indicadores de producción (ITP
Revisar la fórmula de medición presentada en la página siguiente.

 Nov 2018

en.wikipedia.org en.wikipedia.org

Net profit: To calculate net profit for a venture (such as a company, division, or project), subtract all costs, including a fair share of total corporate overheads, from the gross revenues or turnover. Net profit = sales revenue − total costs
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 May 2017


by the Gauss formula we have(4.8)eRslij=hsihlj−hlihsj.
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terrytao.wordpress.com terrytao.wordpress.com

the variations of various tensors under the Ricci flow: (31)

variation formula for the Ricci tensor (13) where is the trace, and the Lichnerowicz Laplacian (or Hodgede Rham Laplacian) on symmetric rank (0,2) tensors is defined by the formula (14) and is the usual connection Laplacian.

 Nov 2013

cran.rproject.org cran.rproject.org

n its spacetime representation (Ogata, 1998), the ETASmodel is a temporal marked point process model, and a special case of marked Hawks process, withconditional intensity function(t;x;yjHt) =(x;y) +Xti<tk(mi)g(tti)f(xxi;yyijmi)
Testing out PDF annotation that also include LaTeX rendered formulas.
