Dev Nambi - You Can't Hide the Signal 2017-12-30T00:04:52-08:00 Dev Nambi Copyright (c) 2010-2013 Dev Nambi Buying a Van Using Data 2017-06-08T00:00:00-07:00 <p>Two of my most popular posts have been about the <a href="">unpleasant process</a> of <a href="">buying a car</a>, including a <a href="">replacement</a> <a href="">vehicle</a>, and a <a href="">cheap car</a> for my sister's family.</p> Popular Groceries using Data 2017-01-09T00:00:00-08:00 <p>Everyone I know has trouble cooking. In my last blog post I looked at the <a href="">most common ingredients in 24K recipes</a>. I realized that there was a flaw in my previous post: it treated all recipes equally.</p> Groceries as a Data Problem 2017-01-05T00:00:00-08:00 <h3>The Benefits of Cooking</h3> Regular Expressions in SQL Server 2016-12-29T00:00:00-08:00 <p><img src="" alt="sql-server-regex logo" /></p> The Drunkard's Search 2016-12-28T00:00:00-08:00 <p>There are many ways to use data to answer questions. I love these questions; they reveal the breadth of interest and depths of curiosity that people have.</p> Air Travel 2016-01-11T00:00:00-08:00 <p>Plane flights are uncomfortable. However, they are supremely <em>useful</em>; they enable me to go to a completely different culture in <strong><em>hours</em></strong>. The main costs are money, <a href="">invasions of privacy</a>, and being forced to <a href="">LARP as a sardine</a> for a day.</p> 2015, Finished 2015-12-31T00:00:00-08:00 <p>On New Years' Eve I think on the events and patterns of the year, as a <a href="">reflective practice</a>. I learn more when I use hindsight to my advantage.</p> 2015, Unfinished 2015-12-30T00:00:00-08:00 <p>2015 is at an end. Each year I think on the events and patterns of the year, as a <a href="">reflective practice</a>. I grow and learn more when I use hindsight to my advantage.</p> Show Me the Tuition 2015-07-23T00:00:00-07:00 <p>College in the United States is expensive.</p> MLConf Seattle 2015-05-10T00:00:00-07:00 <p>A couple of weeks ago I attended Seattle's first <a href="">MLConf</a>, a one-day machine learning conference. I knew from <a href="">YouTube videos</a> just how good this was going to be, and I wasn't disappointed.</p> PASS Summit - Topics, Topics Everywhere 2015-03-05T00:00:00-08:00 <h3>Background</h3> <p>Technical conferences live and die by their community, and their content. A community conference like <a href="">PASS Summit</a> succeeds when it helps its presenters.</p> <p>Several weeks ago, PASS advertised a survey, asking the community what <a href="">topics and sessions</a> they would be interested in. The survey link was sent out with the <a href="">PASS Connector</a> to 122.5K subscribers, and there were 85 responses. That's <a href="">roughly typical</a> for large email surveys.</p> <h3>Survey results and analysis</h3> <p>The raw survey results are <a href="">available</a>. However, one limitation with survey responses is <a href="">sampling bias</a>: survey results don't reflect the audience they represent because some types of people respond more than others.</p> <p>For example, 10.4 % of PASS Summit 2014 attendees were consultants, and yet only 3.6% of the survey responses were. To compensate for this, I biased (weighted) the survey results to be representative of the distribution of Summit attendees. In this example, consultant responses would be weighted by 2.88 (10.4% / 3.6% = 2.88).</p> <p>The weighted survey responses are on <a href="">GitHub</a>.</p> <h3>Overview</h3> <p><strong>Session Content</strong></p> <p><img src="" alt="Session Types" /></p> <p>On a scale of 1-4 (4 meaning ideal interest), the most popular session content is for new SQL Server features, demos, and script examples.</p> <p><strong>Session Format</strong></p> <p><img src="" alt="Session Formats" /></p> <p><strong>Tracks</strong></p> <p><img src="" alt="Tracks" /></p> <h3>Topics of Interest</h3> <p><strong>Azure</strong></p> <p><img src="" alt="Azure Interest" /></p> <p><strong>Application Development</strong></p> <p><img src="" alt="Application Development Interest" /></p> <p><strong>BI Information Delivery</strong></p> <p><img src="" alt="BI Information Delivery Interest" /></p> <p><strong>BI Platform Architecture</strong></p> <p><img src="" alt="BI Platform Architecture Interest" /></p> <p><strong>DBA</strong></p> <p><img src="" alt="DBA Interest" /></p> <p><strong>Professional Development</strong></p> <p><img src="" alt="Professional Development Interest" /></p> <h3>Interpretation</h3> <p>Looking at the data, I find a few interesting narratives:</p> <ul> <li>PASS Summit is a mature conference, and many people are return attendees. As a result, many of the best practices, tips-and-tricks styles of sessions have been done before.</li> <li>There is strong interest in panel discussions and 'birds of a feather' style events. I am guessing that's because there's not enough time to hear from all of the interesting people at PASS.</li> <li>DBA topics haven't changed much since my SQL Server 2005 days: DMVs, performance tuning, monitoring, memory management, HA/DR.</li> <li>BI attendees are really interested in the latest stuff: PowerPivot, self-service BI, Azure BI, and Data Mining.</li> </ul> <p>There are many, many different lessons and conclusions you can draw from this data, so I'll let you speculate about the rest. Enjoy!</p> Say Anything! PASS Summit Feedback and Ratings 2014-12-17T00:00:00-08:00 <p>In my <a href="">last blog post</a>, I explored some of the patterns found when looking at attendance of PASS Summit 2014 sessions. Attendees also left feedback...</p> PASS Summit Attendance and Predictions 2014-12-17T00:00:00-08:00 <p>Technical conferences live and die by their community. An engaged audience and talented speakers will be very successful. The goal of conference organizers, then, is to identify and develop good speakers and good content, so their audience thrives.</p> Cheap Computing with AWS Spot Instances 2014-11-16T00:00:00-08:00 <p>You can run <a href="">Amazon Web Services</a>' <a href="">VMs</a> cheaply by bidding for computing capacity, using <a href="">Spot Instances</a>. The virtual machines (instances) you get are <em>identical</em> to <a href="">on-demand VMs</a>. The only difference is the pricing.</p> Let Me In! The Attendance Challenge 2014-09-30T00:00:00-07:00 <p>Many large technical conferences have a thorny problem: It’s hard for attendees to get into all the sessions they want to attend. The solution is to do a better job with session scheduling and room allocation, assigning the more popular sessions to bigger rooms.</p> T-SQL Tuesday - Assumptions, and Wisdom 2014-07-08T00:00:00-07:00 <p><img src="" style="float:right" /></p> T-SQL Tuesday - Assumptions 2014-07-01T00:00:00-07:00 <p><img src="" style="float:right" /></p> PASS Business Analytics 2014 2014-06-15T00:00:00-07:00 <p>A few weeks ago I had the privilege of attending of the <a href="">PASS Business Analytics conference</a> (PASS BAC) with 750 other data geeks in San Jose, CA.</p> Exercise Using Data 2014-04-18T00:00:00-07:00 <p>There are many choices when looking at nutrition, exercise and medicine. Most people in the US and Europe <a href="">suffer, pay, and die</a> from chronic '<a href="">lifestyle diseases</a>.'</p> The Road Through Strata - Thursday 2014-02-13T00:00:00-08:00 <p>This was my last day at the <a href="">Strata</a> conference.</p>