The New Approach to Work-Life Balance

CareerBuilder found that nearly half of American workers check email after they leave work, and 45% say they do work during non-business hours.
Additionally, this phenomenon crosses global borders, prompting new laws in France and a campaign in Japan to limit working hours.
Of course, we’d all love a little more balance in our lives. But it’s more than that. We need it.

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Smart Targeting: The Better Way to Reach Audiences & Customers

Have you ever visited a website you frequent and found that the text interacts with you?
For instance, when I log onto Mailchimp, my dashboard says, “Welcome back, Kayla” — this is because my account with the site has my first name in its system and uses smart targeting to make my interaction with the website more delightful.

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Why you can’t calculate aging trajectories with a standard regression

I found myself in a little Twitter discussion last week about using regression to analyze player aging. I argued that regression won’t give you accurate results, and that the less elegant “delta method” is the better way to go.Although I did a small example to try to make my point, Tango suggested I do a bigger simulation and a blog post. That’s this.

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Document worth reading: “Adversarial Examples in Modern Machine Learning: A Review”

Recent research has found that many families of machine learning models are vulnerable to adversarial examples: inputs that are specifically designed to cause the target model to produce erroneous outputs. In this survey, we focus on machine learning models in the visual domain, where methods for generating and detecting such examples have been most extensively studied.

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Juiced baseballs, part II

Last post, I showed how MGL found the variation (SD) of MLB baseballs to be in the range of about 7 feet difference for a typical fly ball. I wondered if that were truly the case, or if some of it wasn’t real, just imprecision due to measurement error.After some Twitter conversations that led me to other sources, I’m leaning to the conclusion that the variance is real.

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Roulette Wheel Selection Using SQL

Roulette wheel selection is a very useful algorithm found in many applications such as Genetic Algorithm(GA). In GA solutions with higher fitness values are given larger probabilities of being selected to produce children, just like natural evolution. I implemented an Oracle SQL version of the Roulette wheel selection algorithm.

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The Human Element of Advertising, Why Targeting is Critical, and Other Advertising Insights from LinkedIn’s Marketing Manager

LinkedIn is a powerful tool for marketing — in fact, a HubSpot study found LinkedIn generates the highest visitor-to-lead conversion rate at 2.74%
Businesses in industries ranging from higher education to financial services have all seen success advertising on the platform. Even well-established consumer brands like Subway, the U.S.

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Hadoop Command Line Cheatsheet

Useful commands when using Hadoop on the command line
Filesystem
Full reference can be found in Hadoop Documentation.
ls
hdfs dfs -ls [-R] List the contents of provided directory.
put
hdfs dfs -put Put the local file to provided HDFS location
get
hdfs dfs -get Copy the file to the local file system
cat/text
hdfs dfs -cat
hdfs dfs -text Outputs the contents of HDFS file to standard output.

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Quick links

Some of the tech news I found interesting lately, and you might too: Jeff Bezos: “Many decisions are reversible, two-way doors. Those decisions can use a light-weight process. For those, so what if you’re wrong? …. If you’re good at course correcting, being wrong may be less costly than you think, whereas being slow is going to be expensive for sure.

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