Do people really forget what happened when drinking? – Blackouts


By David Joel Miller.

Memory, Blackouts, Alcohol, and Drugs.

Alcohol and other drugs can impair memory in a number of ways. Alcoholics frequently say they can’t remember what happened while drinking. People who have never had a blackout question if the drinker really can’t remember, or do they just not want to take responsibility for their actions. Both are possible. Alcohol is not the only reason someone might do something and then have no memory of the occurrence. Consider the following examples.

Let’s say that the people in one of the classes I taught all became very close and the group decides they would like to have a celebration after the last session. We decide on a pizza party. We get out the phone book and look up the number. We are all old school, imagine the days before cell phone Apps. I read off the number and one of…

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Making the Rules

Caminao's Ways


Rules can be seen as the glue holding together business, organization, and systems, and that may be a challenge for enterprise architects when changes are to be managed according to different concerns and different time-scales. Hence the importance of untangling rules upfront when requirements are captured and analysed.

Primary Taxonomy

As far as enterprise architecture is concerned, rules can be about:

  • Business and regulatory environments.
  • Enterprise objectives and organization.
  • Business processes and supporting systems.

That classification can be mapped to a logical one:

  • Rules set in business or regulatory environments are said to be deontic as they are to be met independently of enterprise governance. They must be enforced by symbolic representations if enterprise systems are to be aligned with environments.
  • Rules associated with objectives, organization, processes or systems are said to be alethic (aka modal) as they refer to possible, necessary or contingent conditions as defined by enterprise governance. They are to be directly applied to symbolic representations.

Whereas both are…

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Speaking Friday at NC Philanthropy Conference

The Healthcare Marketer

AFPNCCONFThis Friday I will be speaking at the NC Philanthropy Conference in Concord, NC. I’ll serve on a panel at 8:30am and then will teach a Master Class at 10am. I’m honored that they invited me to speak. This is particularly meaningful to me because I come from a family of fundraisers and development professionals. My uncle, David Dunlop, spent his entire career as a development officer for Cornell University and became a thought leader within the fundraising profession. He created and directed Cornell’s major gift program, the first to use what has become known as “Moves Management.” From 1990 to 1995, he served on the senior management team of the Cornell Campaign that set a record for college and university campaigns, receiving over $1.5 billion in gifts. At the CASE International Assembly in Toronto on July 13, 2000, Dave was presented the Frank L. Ashmore Award for his service…

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Should developers test?


These are some of the arguments I have heard over the years:

1. Developers can’t test because they don’t have the right mindset, testers think about negative cases and how to break the system, developers only think about the happy path.

Is this true? There is indeed a huge amount of hackers that don’t care about much, and don’t give a rat’s arse about the quality of their code because they know there is a large number of lowly paid human beings called testers that will clean after them like a babysitter. They feel they shouldn’t bother with testing because other people will do it for them, they focus on writing tons of rubbish code and if a bug is found in production they don’t care because somebody will blame a tester for not finding it, certainly not them for writing it. I call this species the “half developer”. A…

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7Twelve Back-test

Systematic Investor

I recently came across the The 7Twelve Portfolio strategy. I like the catchy name and the strategy report, “An Introduction to 7Twelve.” Following is some additional info about the The 7Twelve Portfolio strategy that I found useful:

Today I want to show how to back-test the The 7Twelve Portfolio strategy using the Systematic Investor Toolbox.

Let’s start by loading historical data

Next, let’s make the The 7Twelve Portfolio strategy with annual/ quarterly and monthly rebalancing.


The strategy does better than the Vanguard 500 Index benchmark, but still suffers a huge draw-down in 2008-2009 period.

How would you make it a better strategy? Please share your ideas.

To view the complete source code for this example, please have a look at the bt.7twelve.strategy.test() function in bt.test.r at github.

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