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hms training school

https://www.youtube.com/watch?v=vCWMBvxWKL0

https://www.youtube.com/watch?v=L3hYjDNbj4Y

this one is good
https://www.youtube.com/watch?v=Au2DGt3rKRw

https://www.youtube.com/watch?v=1GzE7jcf0Rg

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os.system() function 
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To run a system funciton, we can have the 
    following commands
  
import os
os.system('t.mp3')

 Write an R or Python program to download all ppt files 
  source of data: 
     https://book.ivo-welch.info/
     https://book.ivo-welch.info/slides/

 See .project(2)
 .project(2)
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CIK linked to Ticker
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CIK           :  https://en.wikipedia.org/wiki/Central_Index_Key
CIK-ticker    :  http://rankandfiled.com/#/data/tickers

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tickerCIK.RData
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infile<-'http://datayyy.com/data_R/tickerCIK.RData'
a<-load(url(infile))
print(a) # [1] .x
head(.x)
  TICKER     CIK                                           NAME EXCHANGE  SIC BUSINESS INCORPORATED       IRS
1      A 1090872                       Agilent Technologies Inc     NYSE 3825       CA           DE 770518772
2     AA    4281                                      Alcoa Inc     NYSE 3350       PA           PA 250317820
3  AAACU 1332552               Asia Automotive Acquisition Corp          6770       DE           DE 203022522
4   AABB 1287145                             Asia Broadband Inc      OTC 8200       GA           NV 721569126
5   AABC 1024015                     Access Anytime Bancorp Inc          6035       NM           DE 850444597
6    AAC 1099290 Sinocoking Coal & Coke Chemical Industries Inc   NASDAQ 3312       F4           FL 593404233

> dim(.x)
[1] 13737     8

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Google scholar: an explanation 
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 One example: https://scholar.google.com/citations?hl=en&user=SY_k-nwAAAAJ

 Google Scholar is a search engine with special focus on academic
      papers and patents. It's limited in its functionality compared
      to the major academic databases Scopus and Web of Science, but
      it is free, and you will easily know your way around because 
      it is like doing a search on Google.
 what is an h-index?
     An h-index is a rough summary measure of a researcher's 
     productivity and impact. Productivity is quantified by 
     the number of papers, and impact by the number of citations
     the researchers' publications have received. It can be useful
     for identifying the centrality of certain researchers as researchers
     with a higher h-index will, in general, have produced more work which
     is considered important by their peers.

  A simple definition of the h-index
     The h-index was originally defined by J. E. Hirsch in a Proceedings
     of the National Academy of Sciences article as the number of papers
     with citation number ≥ h. An h-index of 3 hence means that the author
     has published at least three articles, of which each has been cited 
     at least three times.

  The h-index can also simply be determined by charting the article's
      citation counts. The h-index is then determined by the interception 
      of the chart's diagonal with the citation data. In this case there 
      are 3 papers that are above the diagonal, and hence the h-index is 3.

     https://paperpile.com/g/h-index/
     https://paperpile.com/g/h-index-google-scholar/
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