Thomas Edison – Wikiquote

From my notes on December 22, 2015.

Hebbian theory via Wikipedia

Hebbian theory is a theory in neuroscience that proposes an explanation for the adaptation of neurons in the brain during the learning process. It describes a basic mechanism for synaptic plasticity, where an increase in synaptic efficacy arises from the presynaptic cell’s repeated and persistent stimulation of the postsynaptic cell. Introduced by Donald Hebb in his 1949 book The Organization of Behavior,1 the theory is also called Hebb’s rule, Hebb’s postulate, and cell assembly theory. Hebb states it as follows:

Let us assume that the persistence or repetition of a reverberatory activity (or “trace”) tends to induce lasting cellular changes that add to its stability.… When an axon of cell A is near enough to excite a cell B and repeatedly or persistently takes part in firing it, some growth process or metabolic change takes place in one or both cells such that A ’​s efficiency, as one of the cells firing B, is increased.1

The theory is often summarized by Carla Shatz’s phrase: “Cells that fire together, wire together”.2 However, this summary should not be taken literally. Hebb emphasized that cell A needs to “take part in firing” cell B, and such causality can only occur if cell A fires just before, not at the same time as, cell B. This important aspect of causation in Hebb’s work foreshadowed what is now known about spike-timing-dependent plasticity, which requires temporal precedence.3 The theory attempts to explain associative or Hebbian learning, in which simultaneous activation of cells leads to pronounced increases in synaptic strength between those cells, and provides a biological basis for errorless learning methods for education and memory rehabilitation.

Pig, Live| Dave Matthews Band

Pig is one of those little songs Dave does that go on to become a favorite. Lately this has been playing on repeat in my head so it’s time to put the song on repeat on the phone and just let it play and play. 

Live version

Studio version

iPhone or Android document /…

iPhone or Android document / photo stand – EllyStand

If you scan documents or take pictures for Evernote or your favorite mobile document app the EllyStand may be for you. It’s on Kickstarter now if you want to jump in early (it’s about half way to it’s finding goal).

I am typing in a note using the…

I am typing in a note using the P2 theme on


Planned Obsolescence?

Lately I’ve been wondering about the modern marvel of planned obsolescence.  Why? A lot of my personal electronics are failing with an amazing regularity. Two iPod shuffles, one pair Shure e2c headphones, one Sony Ericsson. Has me thinking about the practice manufacturers made famous in…

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