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Vincent Granville's Blog (804)

Interview with Ajay Ohri, Data Mining Consultant from India

Short Biography

Ajay Ohri has been working in the field of analytics since 2004 , when it was a still nascent emerging Industries in India. He has worked with the top two Indian outsourcers listed on NYSE,and with Citigroup on cross sell analytics where he helped sell an extra 50000 credit cards by cross sell analytics .He was one of the very first independent data mining consultants in India working on analytics products and domestic Indian market…
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Added by Vincent Granville on April 19, 2008 at 9:15pm — No Comments

Top 10 challenging problems in data mining

  • Developing a unifying theory of data mining
  • Scaling up for high dimensional data and high speed data streams
  • Mining sequence data and time series data
  • Mining complex knowledge from complex data
  • Data mining in a network setting
  • Distributed data mining and mining multi-agent data
  • Data mining for biological and environmental problems
  • Data Mining process-related problems
  • Security, privacy and data…
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Added by Vincent Granville on April 19, 2008 at 12:30pm — No Comments

Applying the Markov copulae approach to modeling credit derivatives

In the latest issue of the Journal of Credit Risk, Bielecki et al. propose a dynamic bottom-up approach by using Markov copula for pricing and hedging credit index derivatives and ratings-triggered corporate step-up bonds.



The Markov copula procedure works efficiently and is a useful step towards developing a copula-like formalism for multivariate processes, which can be applied to the modeling of credit derivatives. Read the full article and receive the current edition of the… Continue

Added by Vincent Granville on April 15, 2008 at 2:55pm — No Comments

Increasing customer loyalty using data analytics

Loyalty Marketing has become a key strategy for most companies in today's competitive marketplace. The practice is based on a very simple premise - as you develop stronger relationships with your best customers, they will stay with you longer; the longer they stay, the more profitable they become.



It costs less to retain a customer than to acquire a new one. To retain a customer involves many factors - personal relationships, product quality, customer service, price, and other brand… Continue

Added by Vincent Granville on April 6, 2008 at 12:15pm — 3 Comments

Predictive Model Markup Language - PMML

The Predictive Model Markup Language (PMML) is a mark up language for statistical and data mining models. Some sort of HTML language to handle statisical tasks such as regression, decision trees etc.



PMML is an XML-based language which provides a way for applications to define statistical and data mining models and to share models between PMML compliant applications.



PMML provides applications a vendor-independent method of defining models so that proprietary issues and… Continue

Added by Vincent Granville on April 5, 2008 at 1:30am — No Comments

Nonparametric regression: the LOESS procedure

PROC LOESS implements a nonparametric method for estimating local regression surfaces pioneered by Cleveland (1979); also refer to Cleveland et al. (1988) and Cleveland and Grosse (1991). This method is commonly referred to as loess, which is short for local regression.



PROC LOESS allows greater flexibility than traditional modeling tools because you can use it for situations in which you do not know a suitable parametric form of the regression surface. Furthermore, PROC LOESS is… Continue

Added by Vincent Granville on March 31, 2008 at 11:00pm — No Comments

Upcoming Data Mining Conferences - Submission Deadlines

ISIPS: Interdisciplinary Studies in Information Privacy and Security, due Mar 30 (extended)

International Conference on Advanced Intelligence (ICAI-08), due Apr 1

The Fifth Conference On Email and Anti-Spam (CEAS 2008), due Apr 3

Intelligent Techniques for Web Personalization & Recommender Systems, due Apr 7

EMAIL-2008: AAAI 2008 Workshop On Enhanced Messaging, due Apr 7

Inference and Estimation in Probabilistic Time-Series Models, due Apr 11

ICDM '08 workshop… Continue

Added by Vincent Granville on March 25, 2008 at 7:30am — No Comments

New Ideas to Forecast Stock Market Trends

My interest has mostly been in trading QQQQ and other major indexes, hoping to build a small portfolio of contrarian (negatively correlated) indexes. I am interested in two types of strategies:



1. A strategy where some cash is dormant on a trading account for most of the time, yielding a return of less than 4% a year when in "dormant mode". Once in a while (it could be every two or three years, sometimes every six months), when large movements occur on the stock market, I step in as… Continue

Added by Vincent Granville on March 22, 2008 at 11:36am — 2 Comments

Salary survey for Data Warehouse and Business Intelligence Professionals

The purpose of this report is to gain a better sense of the people and teams who built and maintained business intelligence (BI) and data warehousing (DW) solutions during the 2007 calendar year. This report uses the term “BI” to refer to both business intelligence and data warehousing initiatives, and the term “BI professionals” to the individuals who deliver these initiatives. Specifically, the report looks at…

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Added by Vincent Granville on March 21, 2008 at 2:00am — No Comments

What is Six Sigma?

The concepts surrounding the drive to Six Sigma quality are essentially those of statistics and probability. In simple language, these concepts boil down to, “How confident can I be that what I planned to happen actually will happen?” Basically, the concept of Six Sigma deals with measuring and improving how close we come to delivering on what we planned to do.



Anything we do varies, even if only slightly, from the plan. Since no result can exactly match our intention, we usually… Continue

Added by Vincent Granville on March 15, 2008 at 9:09am — No Comments

Analyticcircle, Analytictunnel and Other Analytic Domains

The two domains AnalyticCircle.com and AnalyticTunnel.com both currently point to AnalyticBridge. Feel free to use them when you invite contacts to join our network. Other related domains include



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Added by Vincent Granville on March 8, 2008 at 10:00pm — No Comments

AnalyticBridge is a top 10,000 website in Switzerland

According to Alexa. Traffic breakdown:



US: 43%

Switzerland: 27%

Canada: 7%

UK: 7%

Argentina: 7%

Germany: 4%

India: 4%

Netherlands: 2%



Switzerland is known for being one of the best countries for scientific research. AnalyticBridge started on Feb 16th, 2008. Alexa rankings are based on reach (unique users) and pageviews per user, smoothed over a 1-month time period.



Source:… Continue

Added by Vincent Granville on March 6, 2008 at 12:30am — 1 Comment

How to encourage young people to pursue careers in statistics / high tech?

What do you think? Do you agree with Bill Gate's statement? Many math PhDs don't find it easy to get a job. Do recruiters agree with Bill?

See Bill Gates' question on LinkedIn. As of now, it generated more than 3,000 answers on LinkedIn.

Added by Vincent Granville on March 3, 2008 at 1:00pm — 1 Comment

Source code for Robust Ridge and Linear Regression with Bootstrap

Works well with non Gaussian data or outliers. Allows you to set up bounds on the regression parameters (similar to ridge regression). Does not use matrix inversion, thus numerically stable. Robust parameter estimation based on Monte-Carlo simulations and re-sampling. The source code can easily be modified to perform logistic regression. This package can be used by scientists, programmers, analysts or engineers with limited statistical knowledge. Works on Unix, Linux or Windows. We will help… Continue

Added by Vincent Granville on March 1, 2008 at 3:00pm — No Comments

The Analytics Guru - Web Analytics Blog

Marshall Sponder’s rantings about Web Analytics, Art, Social Media, Travels and Politics.

theanalyticsguru.wordpress.com

Added by Vincent Granville on March 1, 2008 at 2:00pm — No Comments

Derivatives Trading, Hedging and Volatility. London, April 2-3.

Wilmott-Taleb Seminar - 2-3 April - London



DERIVATIVES TRADING, HEDGING AND

VOLATILITY IN THE REAL WORLD:

AN EXCLUSIVE TWO-DAY WORKSHOP



Past delegates say: "The best course I have ever attended," "Immensely practical," "Passionate," "New insights," "I recommend it to my friends," "The course was excellent" and "Paul and Nassim make a great team."



Paul Wilmott and Nassim Nicholas Taleb have teamed up to give a two-day workshop on "Derivatives Trading,… Continue

Added by Vincent Granville on March 1, 2008 at 1:00am — No Comments

SAS Global Forum 2008. San Antonio, March 16-19.

Mark your calendars now for SAS Global Forum 2008 to be held March 16 - 19 at the Henry B. Gonzalez Convention Center in San Antonio, Texas.



SAS Global Forum 2008, the premier event for SAS professionals worldwide, has offered unequalled educational and networking opportunities for the past 33 years. Don't miss your chance to sharpen your SAS skills and network with other SAS professionals. You will find information on every topic of interest through more than 300 papers and… Continue

Added by Vincent Granville on March 1, 2008 at 1:00am — No Comments

Certified Analytic Professional

What does Data Shaping mean?



The term was created in 1999 to fill a gap between data mining and statistics. Data shaping is about employing advanced statistical techniques to problems usually handled by computer scientists (machine learning, knowledge discovery, artificial intelligence, web mining). A data shaper is a true software engineer or computer scientist, and a true statistician at the same time, capable of extracting actionable information from large data sets, in… Continue

Added by Vincent Granville on February 25, 2008 at 12:30am — No Comments

Check career websites from 1,500 companies

Fortune 100, Fortune 500, medium size companies, startups, across all industries.

URL: www.datashaping.com/companies3.shtml

Added by Vincent Granville on February 24, 2008 at 4:20pm — No Comments

Web Analytics Professionals: Salary Survey, 2007

The following study has been conducted by Eric Paterson from WebAnalyticsDemystified.com. Eric is also on the board of the Web Analytics Association, and advisor for a number of web analytics companies.

Click here to view the document.

Added by Vincent Granville on February 20, 2008 at 12:30pm — No Comments

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