Tag: data

PMML Augustus

Here is a new-old system in open source for

for building and scoring statistical models designed to work with data sets that are too large to fit into memory.

http://code.google.com/p/augustus/

Augustus is an open source software toolkit for building and scoring statistical models. It is written in Python and its
most distinctive features are:
• Ability to be used on sets of big data; these are data sets that exceed either memory capacity or disk capacity, so
that existing solutions like R or SAS cannot be used. Augustus is also perfectly capable of handling problems
that can fit on one computer.
• PMML compliance and the ability to both:
– produce models with PMML-compliant formats (saved with extension .pmml).
– consume models from files with the PMML format.
Augustus has been tested and deployed on serveral operating systems. It is intended for developers who work in the
financial or insurance industry, information technology, or in the science and research communities.
Usage
Augustus produces and consumes Baseline, Cluster, Tree, and Ruleset models. Currently, it uses an event-based
approach to building Tree, Cluster and Ruleset models that is non-standard.

New to PMML ?

Read on http://code.google.com/p/augustus/wiki/PMML

The Predictive Model Markup Language or PMML is a vendor driven XML markup language for specifying statistical and data mining models. In other words, it is an XML language so that Continue reading “PMML Augustus”

Using Opera Unite to defeat SOPA?

Lets assume that the big bad world of American electoral politics forces some kind of modified SOPA to be passed, and the big American companies have to abide by that law (just as they do share data  for National Security under Patriot Act but quitely).

I belive Opera Unite is the way forward to sharing content on the Internet.

From-

http://dev.opera.com/articles/view/opera-unite-developer-primer-revisited/

Opera Unite features a Web server running inside the Opera browser, which allows you to do some amazing things. At the touch of a button, you can share images, documents, video, music, games, collaborative applications and all manner of other things with your friends and colleagues

I can share music, and files , and the web server is actually my own laptop. try beating 2 billion new web servers that sprout!! File system sharing is totally secure- you can create private, public, or password protected files, a messaging system that can be used for drop messages (called fridge), a secure messaging system and your own web server is ready to start at a click. the open web may just use opera instead of chromium, and US regulation would be solely to blame. even URL blocking is of limited appeal thanks to software like MafiaWire Extension

Throw in Ad block, embedded bit torrent sharing and some more  Tor level encryption within the browser and sorry Senator, but the internet belongs to the planet not to your lobbyist.

see-http://dev.opera.com/web

Going off Search Radar for 2012 Q1

I just used the really handy tools at

https://www.google.com/webmasters/tools/crawl-access

, clicked Remove URL

https://www.google.com/webmasters/tools/crawl-access?hl=en&siteUrl=https://decisionstats.com/&tid=removal-list

and submitted http://www.decisionstats.com

and I also modified my robots.txt file to

User-agent: *
Disallow: /

Just to make sure- I added the meta tag to each right margin of my blog

“<meta name=”robots” content=”noindex”>”

Now for last six months of 2011 as per Analytics, search engines were really generous to me- Giving almost 170 K page views,

Source                            Visits          Pages/Visit
1. google                       58,788                       2.14
2. (direct)                     10,832                       2.24
3. linkedin.com            2,038                       2.50
4. google.com                1,823                       2.15
5. bing                              1,007                      2.04
6. reddit.com                    749                       1.93
7. yahoo                              740                      2.25
8. google.co.in                  576                       2.13
9. search                             572                       2.07

 

I do like to experiment though, and I wonder if search engines just –

1) Make people lazy to bookmark or type the whole website name in Chrome/Opera  toolbars

2) Help disguise sources of traffic by encrypted search terms

3) Help disguise corporate traffic watchers and aggregators

So I am giving all spiders a leave for Q1 2012. I am interested in seeing impact of this on my traffic , and I suspect that the curves would not be as linear as I think.

Is search engine optimization over rated? Let the data decide…. 🙂

I am also interested in seeing how social sharing can impact traffic in the absence of search engine interaction effects- and whether it is possible to retain a bigger chunk of traffic by reducing SEO efforts and increasing social efforts!

 

Some Ways Anonymous Could Disrupt the Internet if SOPA is passed

This is a piece of science fiction. I wrote while reading Isaac Assimov’s advice to writers in GOLD, while on a beach in Anjuna.

1) Identify senators, lobbyists, senior executives of companies advocating for SOPA. Go for selective targeting of these people than massive Denial of Service Attacks.

This could also include election fund raising websites in the United States.

2) Create hacking tools with simple interfaces to probe commonly known software errors, to enable wider audience including the Occupy Movement students to participate in hacking. thus making hacking more democratic. What are the top 25 errors as per  http://cwe.mitre.org/cwss/

–http://www.decisionstats.com/top-25-most-dangerous-software-errors/ ?

 

Easy interface tools to check vulnerabilities would be the next generation to flooding tools like HOIC, LOIC – Massive DDOS atttacks make good press coverage but not so good technically

3) Disrupt digital payment mechanisms for selected targets (in step1) using tools developed in Step 2, and introduce random noise errors in payment transfers.

4) Help create a better secure internet by embedding Tor within Chromium with all tools for anonymity embedded for easy usage – a more secure peer to peer browser (like a mashup of Opera , tor and chromium).

or maybe embed bit torrents within a browser.

5) Disrupt media companies and cloud computing based companies like iTunes, Spotify or Google Music, just like virus, ant i viruses disrupted the desktop model of computing. After that offer solutions to the problems like companies of anti virus software did for decades.

6) Hacking websites is fine fun, but hacking internet databases and massively parallel data scrapers can help disrupt some of the status quo.

This applies to databases that offer data for sale, like credit bureaus etc. Making this kind of data public will eliminate data middlemen.

7) Use cross border, cross country regulatory arbitrage for better risk control of hacker attacks.

8) recruiting among universities using easy to use hacking tools to expand the pool of dedicated hacker armies.

9) using operations like those targeting child pornography to increase political acceptability of the hacker sub culture. Refrain from overtly negative and unimaginative bad Press Relations

10) If you cant convince  them to pass SOPA, confuse them 😉 Use bots for random clicks on ads to confuse internet commerce.

 

Quantitative Modeling for Arbitrage Positions in Ad KeyWords Internet Marketing

Assume you treat an ad keyword as an equity stock. There are slight differences in the cost for advertising for that keyword across various locations (Zurich vs Delhi) and various channels (Facebook vs Google) . You get revenue if your website ranks naturally in organic search for the keyword, and you have to pay costs for getting traffic to your website for that keyword.
An arbitrage position is defined as a riskless profit when cost of keyword is less than revenue from keyword. We take examples of Adsense  and Adwords primarily.
There are primarily two types of economic curves on the foundation of which commerce of the  internet  resides-
1) Cost Curve- Cost of Advertising to drive traffic into the website  (Google Adwords, Twitter Ads, Facebook , LinkedIn ads)
2) Revenue Curve – Revenue from ads clicked by the incoming traffic on website (like Adsense, LinkAds, Banner Ads, Ad Sharing Programs , In Game Ads)
The cost and revenue curves are primarily dependent on two things
1) Type of KeyWord-Also subdependent on
a) Location of Prospective Customer, and
b) Net Present Value of Good and Service to be eventually purchased
For example , keyword for targeting sales of enterprise “business intelligence software” should ideally be costing say X times as much as keywords for “flower shop for birthdays” where X is the multiple of the expected payoffs from sales of business intelligence software divided by expected payoff from sales of flowers (say in Location, Daytona Beach ,Florida or Austin, Texas)
2) Traffic Volume – Also sub-dependent on Time Series and
a) Seasonality -Annual Shoppping Cycle
b) Cyclicality– Macro economic shifts in time series
The cost and revenue curves are not linear and ideally should be continuous in a definitive exponential or polynomial manner, but in actual reality they may have sharp inflections , due to location, time, as well as web traffic volume thresholds
Type of Keyword – For example ,keywords for targeting sales for Eminem Albums may shoot up in a non linear manner after the musician dies.
The third and not so publicly known component of both the cost and revenue curves is factoring in internet industry dynamics , including relative market share of internet advertising platforms, as well as percentage splits between content creator and ad providing platforms.
For example, based on internet advertising spend, people belive that the internet advertising is currently heading for a duo-poly with Google and Facebook are the top two players, while Microsoft/Skype/Yahoo and LinkedIn/Twitter offer niche options, but primarily depend on price setting from Google/Bing/Facebook.
It is difficut to quantify  the elasticity and efficiency of market curves as most literature and research on this is by in-house corporate teams , or advisors or mentors or consultants to the primary leaders in a kind of incesteous fraternal hold on public academic research on this.
It is recommended that-
1) a balance be found in the need for corporate secrecy to protest shareholder value /stakeholder value maximization versus the need for data liberation for innovation and grow the internet ad pie faster-
2) Cost and Revenue Curves between different keywords, time,location, service providers, be studied by quants for hedging inetrent ad inventory or /and choose arbitrage positions This kind of analysis is done for groups of stocks and commodities in the financial world, but as commerce grows on the internet this may need more specific and independent quants.
3) attention be made to how cost and revenue curves mature as per level of sophistication of underlying economy like Brazil, Russia, China, Korea, US, Sweden may be in different stages of internet ad market evolution.
For example-
A study in cost and revenue curves for certain keywords across domains across various ad providers across various locations from 2003-2008 can help academia and research (much more than top ten lists of popular terms like non quantitative reports) as well as ensure that current algorithmic wightings are not inadvertently given away.
Part 2- of this series will explore the ways to create third party re-sellers of keywords and measuring impacts of search and ad engine optimization based on keywords.

Topic Models

Some stuff on Topic Models-

http://en.wikipedia.org/wiki/Topic_model

In machine learning and natural language processing, a topic model is a type of statistical model for discovering the abstract “topics” that occur in a collection of documents. An early topic model was probabilistic latent semantic indexing (PLSI), created by Thomas Hofmann in 1999.[1] Latent Dirichlet allocation (LDA), perhaps the most common topic model currently in use, is a generalization of PLSI developed by David Blei, Andrew Ng, and Michael Jordan in 2002, allowing documents to have a mixture of topics.[2] Other topic models are generally extensions on LDA, such as Pachinko allocation, which improves on LDA by modeling correlations between topics in addition to the word correlations which constitute topics. Although topic models were first described and implemented in the context of natural language processing, they have applications in other fields such as bioinformatics.

http://en.wikipedia.org/wiki/Latent_Dirichlet_allocation

In statistics, latent Dirichlet allocation (LDA) is a generative model that allows sets of observations to be explained by unobserved groups that explain why some parts of the data are similar. For example, if observations are words collected into documents, it posits that each document is a mixture of a small number of topics and that each word’s creation is attributable to one of the document’s topics. LDA is an example of a topic model

David M Blei’s page on Topic Models-

http://www.cs.princeton.edu/~blei/topicmodeling.html

The topic models mailing list is a good forum for discussing topic modeling.

In R,

Some resources I compiled on Slideshare based on the above- Continue reading “Topic Models”

Business Analytics Projects

As per me, Analytics Projects get into these four  broad phases-

  • Business Problem  Phase– What needs to be done?
  1. Increase Revenues
  2. Cut Costs
  3. Investigate Unusual Events
  4. Project Timelines
  • Technical Problem Phase – Technical Problems in Project Execution 
  1. Data Availability /Data Quality/Data Augmentation Costs
  2. Statistical -(Technique based approach) , Hypothesis Formulation,Sampling, Iterations
  3. Programming-(Tool based approach) Analytics Platform Coding (Input, Formats,Processing)
  • Technical Solution Phase – Problem Solving using the Tools and Skills Available 
  1. Data Cleaning /Outlier Treatment/Missing Value Imputation
  2. Statistical -(Technique based approach) Error Minimization, Model Validation, Confidence Levels
  3. Programming-(Tool based approach) Analytics Platform Coding (Output, Display,Graphs)
  • Business Solution Phase– Put it all together in a word document, presentation and/or spreadsheet
  1. Finalized- Forecasts  , Models and Data Strategies
  2. Improvements  in existing processes
  3.  Control and Monitoring of Analytical Results post Implementation
  4. Legal and Compliance  guidelines to execution
  5. (Internal or External) Client Satisfaction and Expectation Management
  6. Audience Feedback based on presenting final deliverable to broader audience