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Have you ever played Akinator? You think of a character, a genie asks you some twenty questions, and somehow it knows. That’s fingerprinting in a nutshell, except your browser answers the questions for you. Once you understand information entropy, Akinator’s magic turns into a simple trick. Let’s simplify with that…
...libraries are a natural example of a memory hierarchy when used in concert with our own desk space. In fact, libraries in themselves, with their various sections and storage facilities, are a great example of a memory hierarchy with multiple levels. As a consequence, they face all sorts of caching problems. They…
Consider the game of Chess. Typically it's played with a collection of Chess pieces on a chessboard consisting of black and white squares. We can all agree, I think, that these are indeed real-world objects. Moreover, the game involves a set of rules specifying how the pieces can move, what constitutes a legal…
At first sight, things seem quite similar in City Number Two. Again, there are ubiquitous cameras, perched on every vantage point. Only here we soon find a crucial difference. The devices do not report to the secret police. Rather, each and every citizen of this metropolis can lift his or her wristwatch/TV and call up…
When I am reading Hamlet I often develop an urge to tell people about it, as if the Melancholy Dane's history had heretofore been classified as a top secret. I am bursting with information about Hamlet, so filled am I by the massive "evidence" presented by Shakespeare. So I sit down at my writing table and begin to…
Almost all of those limits start with a peculiar fact about human memory: Although we are pretty good at storing information in our brains, we are pretty poor at retrieving it. We can recognize photos from our high school yearbooks decades later, yet find it impossible to remember what we had for breakfast yesterday…
In the earliest days of research, memory was thought to be populated with socalled engrams, memory traces that were localized in specific parts of the brain. To locate one such engram—for the memory of a maze—psychologist Karl Lashley taught rats to run through a labyrinth. He then cut out various parts of their brain…
...science, like art, is a cultural expression that makes a nation worth defending. Like great art and great music, its true value lies in exploring the unknown. Today, the opposite argument, the commoditization of science, is virtually the only one heard. It has metastasized from the smaller-minded appeals of the…
Again, in the customs and institutions of schools, academies, colleges, and similar bodies destined for the abode of learned men and the cultivation of learning, everything is found adverse to the progress of science. For the lectures and exercises there are so ordered that to think or speculate on anything out of the…
Man, being the servant and interpreter of Nature, can do and understand so much and so much only as he has observed in fact or in thought of the course of nature. Beyond this he neither knows anything nor can do anything.
Psychologists have tested memory performance in people all over the world and found that those who have completed at least a few years of formal education score higher than those from the same culture and economic status who did not attend school; and the more years completed, the better the performance. Where formal…
But then I began to think, what else is there that we believe? (And I thought then about the witch doctors, and how easy it would have been to cheek on them by noticing that nothing really worked.) So I found things that even more people believe, such as that we have some knowledge of how to educate. There are big…
Time-stamping is of interest because the temporal element of context is essential for understanding a text (to take an obvious example, when reading a paper on global geopolitics in 2006 it is essential to know whether it was written before or after 11th September, 2001). Furthermore, some information has a 'sell-by…
The first thing to face is that we shall not store all the technical and scientific papers in computer memory. We may tore the parts that can be summarized most succinctly--the quantitative parts and the reference citations--but not the whole. Books are among the most beautifully engineered, and human-engineered…