Anatomy of a Program in Memory : Gustavo Duarte
http://duartes.org/gustavo/blog/post/anatomy-of-a-program-in-memory

the concepts are generic, examples are mostly from Linux and Windows on 32-bit x86.

Excelente artículo de Gustavo Duarte sobre la administración de memoria.

Article intéressant et illustré sur la manière dont les systèmes d'exploitation gèrent la mémoire des processus.

It's not a pretty picture: a never-ending stream of phone calls, e-mails, instant messages, text messages and tweets is part of an institutionalized culture of interruption, and makes it hard to concentrate and think creatively.

Studies show that information workers now switch tasks an average of every three minutes throughout the day. This degree of interruption is correlated with stress and frustration and lowered creativity.

"Paying attention isn't a simple act of self-discipline, but a cognitive ability with deep neurobiological roots — and this complex faculty, says Maggie Jackson, is being woefully undermined by how we're living. In Distracted: The Erosion of Attention and the Coming Dark Age, Jackson explores the effects of "our high-speed, overloaded, split-focus and even cybercentric society" on attention. It's not a pretty picture: a never-ending stream of phone calls, e-mails, instant messages, text messages and tweets is part of an institutionalized culture of interruption, and makes it hard to concentrate and think creatively. Of course, every modern age is troubled by its new technologies. "The telegraph might have done just as much to the psyche [of] Victorians as the Blackberry does to us," said Jackson. "But at the same time, that doesn't mean that nothing has changed. The question is, how do we confront our own challenges?" Wired.com talked to Jackson about attention and its loss."

yes

The other important thing is to discuss interruption as an environmental question and collective social issue. In our country, stillness and reflection are not especially valued in the workplace. The image of success is the frenetic multitasker who doesn't have time and is constantly interrupted. By striving towards this model of inattention, we're doing ourselves a tremendous injustice.

on-building-a-stupidly-fast-graph-database

connected to and things that connect to them. These are symmetrical — so creating a link from item A to item B, creates a reference from item B to item A.

doodle away folks!

from Tracey Isidro

config.trim_on_minimize

In our latest browser speed tests, I half-heartedly complained that Firefox eats up memory over long periods of use. Our lovely, helpful commenters pointed out that there is, indeed, a tweak to help with that. It's important to note that this about:config tweak doesn't actually change how Firefox uses (and hoards) memory over actual use. For the purposes of user speed, then, it's not much change. But while Windows can normally grab memory back from applications that are minimized, Firefox prevents that and keeps all the memory it acquired during your multi-tab wanderings—unless you enable this tweak, which some have claimed also makes Firefox scale down the big memory pile it had going upon re-focusing.

There is a difference between an excuse and a reason, know the difference.

Moral lesson

Links and Resources

# nt a better summary of heap statistics. # Sort objects by retained heap. In other words, some tools can tell you the memory usage of an object and all other objects that are referenced by it, as well as list the objects referenced by other objects. This makes it much faster to diagnose the cause of a memory leak.

How to Fix Memory Leaks in Java | Javalobby

thorough tutorial on identifying and fixing memory leaks, focused on Java

In this article I am going to tell you how to decrease firefox memory usage and increase firefox speed. This article of mine has two parts. So, follow each part to the end to make your Firefox Faster and Reduce your Firefox Memory Usage:

Mempercepat firefox

If I couold be bothered...

understand my meaning better I have taken picture of my deskto

We are on the edge of two potent technological changes: Clouds and Memory Based Architectures. This evolution will rip open a chasm where new players can enter and prosper. Google is the master of disk. You can't beat them at a game they perfected. Disk based databases like SimpleDB and BigTable are complicated beasts, typical last gasp products of any aging technology before a change. The next era is the age of Memory and Cloud which will allow for new players to succeed. The tipping point is soon. Let's take a short trip down web architecture lane: # It's 1993: Yahoo runs on FreeBSD, Apache, Perl scripts and a SQL database # It's 1995: Scale-up the database. # It's 1998: LAMP # It's 1999: Stateless + Load Balanced + Database + SAN # It's 2001: In-memory data-grid. # It's 2003: Add a caching layer. # It's 2004: Add scale-out and partitioning. # It's 2005: Add asynchronous job scheduling and maybe a distributed file system. # It's 2007: Move it all into the cloud. # It's 2008: Cloud +

What makes Memory Based Architectures different from traditional architectures is that memory is the system of record. Also discussed Jim Starkey NimbusDB

Fix Memory

great bookmarks

How to Fix Memory Leaks in Java

Flash Card Flash

Find flashcards from the best flashcard sites.

http://www.flashcardflash.com/

Find flashcards from the best flashcard sites

This article explains what native memory is, how the Java runtime uses it, what running out of it looks like, and how to debug a native OutOfMemoryError on Windows® and Linux®

Even if you think you’re pretty smart or have a good memory, your brain is begging you to work it to its full potential. Getting stuck in the same routine, never exercising and eating junk food are all brain killers that decrease good cognitive function and increase your chances of memory loss, dementia and Alzheimer’s. But with these 50 tips and ideas for flexing your brain power, you’ll be able to boost performance right now and in the future.

I can haz higher IQ?

Instead of seeing a single series of items like the one above, test-takers saw two different sequences, one of single letters and one of spatial locations.

Find N-Back test on web

The scene: A rigorous intro-level survey course in biology, history, or economics. You're the instructor, and students are crowding the lectern, pleading for study advice for the midterm. If you're like many professors, you'll tell them something like this: Read carefully. Write down unfamiliar terms and look up their meanings. Make an outline. Reread each chapter. That's not terrible advice. But some scientists would say that you've left out the most important step: Put the book aside and hide your notes. Then recall everything you can. Write it down, or, if you're uninhibited, say it out loud. Two psychology journals have recently published papers showing that this strategy works, the latest findings from a decades-old body of research. When students study on their own, "active recall" — recitation, for instance, or flashcards and other self-quizzing — is the most effective way to inscribe something in long-term memory.

That old study method still works, researchers say. So why don't professors preach it?

doodling makes you smarter!

More doodles of infinite awesomeness. Love!

"[The] team asked 40 people to listen to a recording containing the names of people and places. Afterwards the people wrote down the names they could remember. While listening, half of the test subjects were also required to shade in shapes on a piece of paper. Afterwards, they remembered one-third more names than test subjects who didn't doodle while listening. "

Doodling improves concentration

If you want to make the right decisions in confusing times—Time to refinance? Explore a different career? Root for the singing spinster or the 12-year-old?—you need to pay special attention to what you eat. That’s right: Your grocery list can help with your to-do list. That’s because the right foods are a kind of clean-burning fuel for your body’s biggest energy hog: Your brain. A study in the Journal of Physiology makes the point that, though your brain represents only 2 percent of your body weight, it makes 20 percent of the energy demands on your resting metabolism. On our new Eat This, Not That! Web site, we rounded up the best foods to munch on when you need a mental boost—and found studies that show, in fact, that you can be up to 200 percent more productive if you make the right eating choices. Stock up on these items to halt mental decline, jog your memory, sharpen your senses, improve your performance, activate your feel-good hormones, and protect your quick-witted sharpness

It's from Men's Health magazine, so I question its scientific authority (harping on the Thanksgiving tryptophan thing still? pork has more than turkey, thank you), but in general this seems like solid advice.

Practical things to do with your camera.

This is funny - but amazing - great tips that will make your life easier and have me thinking - now why didn't I think of that?

12 Ways to Use Your Camera as a Tool

A camera is not only to take pictures

Jeff Hawkins

Jeff Hawkins kertoo aivotutkimuksen teorianmuodostuksesta sekä esittelee parhaan kuulemani älykkyyden määritelmän. Kiva kuullaa miestä, kun on aikoinaan lukenut tämän saman hänen kirjastaan.

Treo creator Jeff Hawkins urges us to take a new look at the brain -- to see it not as a fast processor, but as a memory system that stores and plays back experiences to help us predict, intelligently, what will happen next.

TED talk - currently no theory about how brain works because there is not framework for the theory - The framework is memory and prediction not behavior and computational ability.

vp |||||| ap ||||| kp |||

cal production Rails app on Ruby 1.8 can recover 20% to 40% o

recently started using chrome, hmmm

Google Chrome

Milyen az új Chrome?

Problem. You are interested in how the Google Chrome 3.0 Dev, Firefox 3.5 RC, Safari 4.0 for Windows, and Opera 10b web browsers manage memory on the Windows Vista operating system over moderate usage, such as with 150 top web sites. These numbers can be measured but there are complexities involved in measuring memory. Solution. Here we look at a program that simulates a user visiting the top 150 web sites from Alexa from the command line, with visits occurring at short but varying intervals in many tabs.

So firefox is the best. Premature optimisation anyone?

Welcome back to another Friday Q&A. Now that WWDC is behind us, I'm back on track to bring you more juicy highly-technical goodness. Maybe I can even get back to doing one a week.... This week I'm going to take André Pang's suggestion of discussing process memory statistics (the stuff you see in Activity Monitor or top) in Mac OS X. Memory Structure Before I can discuss what the stats mean, I first have to discuss just how memory actually works on a modern operating system. If you already know the difference between physical memory and virtual address space, understand how file mapping works, etc., then feel free to skip ahead. Ram, Memory, Activity Monitor.

Description of the memory management of OS X from the user perspective

Example of ActionScript profiler to track framerate or memory usage

This handy script applies a profiler option to the right click Flash Context Menu which allows you to debug or track the current FPS or memory used by your SWF. Further to this it also stores a configurable history length of the frame rate and memory performance for the SWF.

SWF Profiler

Flash の メモリ使用量やフレームレートなどのパフォーマンスが分かるライブラリ。

"A group of Spanish researchers reported today in Science that they may have stumbled upon a substance that could become the ultimate memory-enhancer. The group was studying a poorly-understood region of the visual cortex. They found that if they boosted production of a protein called RGS-14 (pictured) in that area of the visual cortex in mice, it dramatically affected the animals' ability to remember objects they had seen. Mice with the RGS-14 boost could remember objects they had seen for up to two months. Ordinarily the same mice would only be able to remember these objects for about an hour. The researchers concluded that this region of the visual cortex, known as layer six of region V2, is responsible for creating visual memories. When the region is removed, mice can no longer remember any object they see."

Imagine if you could look at something once and remember it forever. You would never have to ask for directions again. Now a group of scientists has isolated a protein that mega-boosts your ability to remember what you see.

nifty!

I'm not staring into space, I'm trying to live a balanced life

Everyone who knows me needs to read this article

science technology

Memristors... The 6th missing basic electronic factor..

Bio computers

"Systems on the edge of chaos are said to be in a state of "self-organised criticality". These systems are right on the boundary between stable, orderly behaviour - such as a swinging pendulum - and the unpredictable world of chaos, as exemplified by turbulence... Brain scans used to map the connections between regions of the human brain discovered that they form a "small-world network" - exactly the right architecture to support self-organised criticality. Small-world networks lie somewhere between regular networks, where each node is connected to its nearest neighbours, and random networks, which have no regular structure but many long-distance connections between nodes at opposite sides of the network. Small-world networks take the most useful aspects of both systems. In places, the nodes have many connections with their neighbours, but the network also contains random and often long links between nodes that are very far away from one another. It's the perfect compromise."

Do ideas sometimes pop into your head from, it seems, nowhere? Yes, and it’s because your brain actually operates on the edge of chaos. In fact, your brain is like a pile of sand, but don't worry: that's why it has such remarkable powers

how to use instruments

A “Leaks” Tool Tutorial

hyperthymestic syndrome,

This piece blew my mind.

Researchers had never found a subject with a perfect memory — then along came Jill Price.

a mulher que não esquece nada

The woman remembers dates to the day. Amazing. But know few quizzers who can do the same.

Though machines with 4GB are not yet the typical purchase for home or business use, they are readily available from major manufacturers and it won’t be long before they are the typical purchase. But there are problems. You don’t have to stand for long in a computer shop to hear a sales assistant talk of 4GB as some sort of limit for 32-bit operating systems, and it won’t be long before this sales patter develops into outright promotion of 64-bit Windows as the only way to get past this limit. Some sense of this can be seen already in manufacturers’ advertising materials, as in the following fine print from Dell:

You probably already know this, but this page describes PAE and how a 32-bit OS can use more than 4GB of RAM (and already does - see Windows Server editions).

In several benchmark tests of focus, college students who routinely juggle many flows of information, bouncing from e-mail to web text to video to chat to phone calls, fared significantly worse than their low-multitasking peers.

Some people suspect that a multitasking lifestyle has changed how they think, leaving them easily distracted and unable to concentrate even when separated from computers and phones. Their uneasiness may be justified. In several benchmark tests of focus, college students who routinely juggle many flows of information, bouncing from e-mail to web text to video to chat to phone calls, fared significantly worse than their low-multitasking peers.

[Multitaskers are] "suckers for irrelevancy. Everything distracts them." "They couldn't help thinking about the task they weren't doing," Ophir said. "The high multitaskers are always drawing from all the information in front of them. They can't keep things separate in their minds."

You might think a lot gets done when you multitask, but a study conducted by Stanford researchers Eyal Ophir, Clifford Nass and Anthony Wagner says it isn't so.

People who are regularly bombarded with several streams of electronic information do not pay attention, control their memory or switch from one job to another as well as those who prefer to complete one task at a time, a group of Stanford researchers has found.

A common complaint about mod_python is that it uses too much memory and can cause huge spikes in processor load. Fact is that this isn't really caused by mod_python itself, but indirectly by virtue of how, or more so how not, Apache has been configured for the type of web application that is being run.

this is IMPORTANT

Some have realised that mod_wsgi daemon mode seems to offer a more predictable memory usage profile and performance curve and as a result fervently recommend it, but at the same time they still don't seem to understand what the problems with embedded mode, as outlined above actually were. So, hopefully the explanation above will help in clearing up why, not just in the case of mod_wsgi daemon mode vs mod_wsgi embedded mode, but also for the much maligned mod_python.

out of date, hence the mod_python, but the apache conf still applies

"WSGI middleware which displays sparklines of Python object counts and allows you to introspect them, using the gc module under the hood"

Finding and fixing memory leaks can be a real challenge, but luckily Python has some pretty good tools for spotting these things. I have already written about this issue and this post will go into more details on how to spot and debug a memory leak in MySQLdb, which is the standard Python wrapper for MySQL.

ou combined memory

Common causes of memory related issues - out of memory, excessive memory usage, and memory leaks in java applications.

Memory Leaks and other memory related problems are among the most prominent performance and scalability problems in Java. Reason enough to discuss this topic in more detail.

.

Tweak your workflow and inboxes all you want, but your mental memory might always be the weakest link in your day-to-day life. These 10 tools take some of the workload off your brain, and prevent a few forehead slaps.

mnemonic devices.

Whether you're a college student studying for an important test or an aging baby boomer concerned about forgetting a recent doctor's appointment, there are a few things everyone can do to optimize the storage and checkouts in our private libraries of memories.

Here are 10 simple ways to improve your memory. Read our list of ways to improve your memory and learn to make those memories stick.

Interesting gadget but I don't want to buy it by $800.

powerful tool in combination with social networking

The ViconRevue was originally developed as the SenseCam by Microsoft Research Cambridge, UK, for researchers studying Alzheimer's and other dementias. Studies showed that reviewing the events of the day using SenseCam photos could help some people improve long-term recall.

This article talks about enabling "lifeloggers" who attempt to electronically record as much of their life as possible. This reminds me a lot about Chris Pirillo and the camera he has setup, but also the lightening round we just had about 3D google mapping using cameras.

"Worn on a cord around the neck, the camera takes pictures automatically as often as once every 30 seconds. It also uses an accelerometer and light sensors to snap an image when a person enters a new environment, and an infrared sensor to take one when it detects the body heat of a person in front of the wearer. It can fit 30,000 images onto its 1-gigabyte memory."

A camera you can wear as a pendant to record every moment of your life will soon be launched by a UK-based firm.

Capture it all automatically

A camera you can wear as a pendant to record every moment of your life will soon be launched by a UK-based firm. Originally invented to help jog the memories of people with Alzheimer's disease, it might one day be used by consumers to create "lifelogs" that archive their entire lives. Worn on a cord around the neck, the camera takes pictures automatically as often as once every 30 seconds. It also uses an accelerometer and light sensors to snap an image when a person enters a new environment, and an infrared sensor to take one when it detects the body heat of a person in front of the wearer. It can fit 30,000 images onto its 1-gigabyte memory.

"People remember things better, longer, if they are given very challenging tests on the material, tests at which they are bound to fail. In a series of experiments, they showed that if students make an unsuccessful attempt to retrieve information before receiving an answer, they remember the information better than in a control condition in which they simply study the information."

People remember things better, longer, if they are given very challenging tests on the material, tests at which they are bound to fail. In a series of experiments, they showed that if students make an unsuccessful attempt to retrieve information before receiving an answer, they remember the information better than in a control condition in which they simply study the information. Trying and failing to retrieve the answer is actually helpful to learning.

"People remember things better, longer, if they are given very challenging tests on the material, tests at which they are bound to fail. In a series of experiments, they showed that if students make an unsuccessful attempt to retrieve information before receiving an answer, they remember the information better than in a control condition in which they simply study the information. Trying and failing to retrieve the answer is actually helpful to learning. It’s an idea that has obvious applications for education, but could be useful for anyone who is trying to learn new material of any kind."

Reminded me that asking questions BEFORE reading the chapter is a better way to prepare students for learning.

@tommorris: "Oh my, justification at last: http://is.gd/4Pdl0" (from http://twitter.com/tommorris/status/5493288033)

I like this

'A grumpy person can cope with more demanding situations than a happy one because of the way the brain "promotes information processing strategies".'

In a bad mood? Don't worry - according to research, it's good for you.

n "promotes information processing strategies". Negative moods trigger more attentive, careful thinking, paying greater attention to the external world Professor Joe Forgas He asked volunteers to watch different films and dwell on positive or negative events

Shortest sentence

shortest sentence using all letters in alphabet

<DigitalKiwi> caseyd: http://www.cyberciti.biz/tips/linux-swap-space.html

Linux: Should You Use Twice the Amount of Ram as Swap Space?

kes sense to you, the best thing you can do now is creating your learning log. It doesn’t need to be perfect, a

Learn how to remember things you learn.

Despite what a lot of people believe, it's easy to introduce memory and resources leaks in .NET applications. The Garbage Collector, or GC for close friends, is not a magician who would completely relieve you from taking care of your memory and resources consumption. I'll explain in this article why memory leaks exist in .NET and how to avoid them. Don't worry, I won't focus here on the inner workings of the garbage collector and other advanced characteristics of memory and resources management in .NET. It's important to understand leaks and how to avoid them, especially since they are not the kind of things that is easy to detect automatically. Unit tests won't help here. And when your application crashes in production, you'll be in a rush looking for solutions. So, relax and take the time to learn more about this subject before it's too late. Table of Content * Introduction * Leaks? Resources? What do you mean? * How to detect leaks and find the leaking resources *

.NETでリークする要因。「Events, or the "lapsed listener" issue」は良く目にする。

mind that there are factors in play other than raw page load performance. As a general rule of thumb, if most of your sprite doesn't contain real image content, you should probably avoid using it. Also, keep an eye out for fu

Note that this is a 1299x15,000 PNG. It compresses quite well — the actual download size is around 26K — but browsers don't render compressed image data. When this image is downloaded and decompressed, it will use almost 75MB in memory (1299 * 15000 * 4).

The human brain is not optimized for the abstract thinking and data memorization that websites often demand. Many usability guidelines are dictated by cognitive limitations.

Learn Language Vocabulary with Mnemonics

learn spanish, other languages

Memorista currently offers learning tools for 5 languages—French, German, Italian, Polish, and Spanish. Choose from several flashcard packs for each language, like People, Basic Expressions, or Food and Drink. Each word or phrase is presented in flashcard format, and accompanied by a mnemonic to help you associate the words. When you think you've mastered a category, Memorista tests you to check your progress.

As noted in the instructions, Process Blocker runs as a system service, watching for certain processes and killing them off if it finds them running. The app won't provide you a list of background services or apps for selection, though—this is a text affair. If you look in your Task Manager (Control-Shift-Escape), or your super-charged Process Explorer

Recently, researchers have found even more positive news. The brain, as it traverses middle age, gets better at recognizing the central idea, the big picture. If kept in good shape, the brain can continue to build pathways that help its owner recognize patterns and, as a consequence, see significance and even solutions much faster than a young person can. The trick is finding ways to keep brain connections in good condition and to grow more of them. “The brain is plastic and continues to change, not in getting bigger but allowing for greater complexity and deeper understanding,” says Kathleen Taylor, a professor at St. Mary’s College of California, who has studied ways to teach adults effectively. “As adults we may not always learn quite as fast, but we are set up for this next developmental step.” [via xeks]

“As adults we have these well-trodden paths in our synapses,” Dr. Taylor says. “We have to crack the cognitive egg and scramble it up. And if you learn something this way, when you think of it again you’ll have an overlay of complexity you didn’t have before — and help your brain keep developing as well.”

How Google Works

'...while both [Google] search queries and processing power have gone up by a factor of 1000, latency has gone down from around 1000ms to 200ms. Crawler updates now take minutes compared to months in 1999.'

Annotated link http://www.diigo.com/bookmark/http%3A%2F%2Fwww.nytimes.com%2F2010%2F01%2F03%2Feducation%2Fedlife%2F03adult-t.html%3Fem

Jack Mezirow, a professor emeritus at Columbia Teachers College, has proposed that adults learn best if presented with what he calls a “disorienting dilemma,” or something that “helps you critically reflect on the assumptions you’ve acquired.”

Memory tips

based on some recent neuroscience studies

memory_brainOf course, it’s not that simple; but if you believe Dr Tracy Alloway from the University of Stirling in Scotland, Twitter and Facebook are very different beasts when it comes to improve your “working memory“, which relates to “the structures and processes used for temporarily storing and manipulating information in short-term memory.”

Facebook Makes You Smarter, Twitter Makes You Dumber

Psychologist: Facebook Makes You Smarter, Twitter Makes You Dumber http://ff.im/-7LOlp [from http://twitter.com/kenmat/statuses/3827888273]

Of course, it’s not that simple; but if you believe Dr Tracy Alloway from the University of Stirling in Scotland, Twitter and Facebook are very different beasts when it comes to improve your “working memory“ [...]

Psychologist: Facebook Makes You Smarter, Twitter Makes You Dumber: Of course, it&#8217;s not that simple; but i.. http://bit.ly/mvYOS [from http://twitter.com/StoneCS/statuses/3818117834]

True or Not? Psychologist: Facebook Makes You Smarter, Twitter Makes You Dumber http://ow.ly/orHP [from http://twitter.com/gideonking/statuses/3836716669]

Roger Ebert's poignant piece on what he misses about eating, now that he no longer can.

": Isn't it sad to be unable eat or drink? Not as sad as you might imagine. I save an enormous amount of time. I have control of my weight. Everything agrees with me. And so on. What I miss is the society. Lunch and dinner are the two occasions when we most easily meet with friends and family. They're the first way we experience places far from home. Where we sit to regard the passing parade. How we learn indirectly of other cultures. When we feel good together. Meals are when we get a lot of our talking done -- probably most of our recreational talking. That's what I miss."

Roger Ebert talks about no longer being able to eat, drink, or speak.

You know how important it is to boost your brain power. Increasingly, the world requires more smarts. If you can think fast, think well and remember things, you have an edge, whether it’s in the job market or just staying on top of your game. If you want to make your brain stronger and faster, though, you have to give it a good workout. Just like everything else, how you use your brain can make a big difference in the results you get. Here are 55 tips that can make your brain stronger and faster:

Memorize Now - a free tool to memorizing information

monopoles gather to form a "magnetic current" like electricity. The phenomenon, dubbed "magnetricity", could be used in magnetic storage or in computing. Magnetic monopoles were first predicted to exist over a century ago, as a perfect analogue to electric charges. Although there are protons and electrons with net positive and negative electric charges, there were no particles in existence which carry magnetic charges. Rather, every magnet has a "north" and "south" pole. //"particles" which carry an overall magnetic charge. But they exist only in the spin ice crystals.

Researchers have discovered a magnetic equivalent to electricity: single magnetic charges that can behave and interact like electrical ones. The work is the first to make use of the magnetic monopoles that exist in special crystals known as spin ice.

Apparently magnets with only one pole exist

"Researchers have discovered a magnetic equivalent to electricity: single magnetic charges that can behave and interact like electrical ones."

'Magnetic electricity' discovered

Researchers have discovered a magnetic equivalent to electricity: single magnetic charges that can behave and interact like electrical ones.

nanotechnology has helped discover magnetricity, particles that carry magnetic charges

Drinking five cups of coffee a day could reverse memory problems seen in Alzheimer's disease, US scientists say.

The Florida research, carried out on mice, also suggested caffeine hampered the production of the protein plaques which are the hallmark of the disease.

Older news, but I finally got around to reading it. Interesting piece on the importance of color.

In the latest and most authoritative study on color's cognitive effects, test subjects given attention-demanding tasks did best when primed with the color red. Asked to be creative, they responded best to blue.

Plugging memory leaks in JavaScript is easy enough when you know what causes them. In this article authors Kiran Sundar and Abhijeet Bhattacharya walk you through the basics of circular references in JavaScript and explain why they can cause problems in certain browsers, especially when combined with closures. After seeing some of the common memory leak patterns you should watch out for, you'll learn a variety of easy ways to work around them.

Memory Leaks in Javascript -> wie wo was warum erklärt dieser Artikel ganz nett

We all suffer occasional lapses in memory. Some people suffer severe neurological conditions, such as Alzheimer's, that rob them of their ability to form memories or remember recent events. Three new studies shed light on the way the brain forms, stores and retrieves memories. Experts say they could have implications for people with certain mental disorders.

Zen Habits

"Effectively, Kingston is just a channel trader and is probably seen by SanDisk/Toshiba as a demand buffer for their production output. I also wouldn’t be surprised if SanDisk/Toshiba was selling Kingston “A-” grade parts, i.e., parts with slightly more defective sectors, but otherwise perfectly serviceable. As a result, Kingston plays a significant and important role in stabilizing microSD card prices and improving fab margins, but at some risk to their own brand image."

Apparently Kensington releases SD cards produced on "Ghost Shifts", with sub-standard materials.

So you want to build a computer

you want to build a computer

Headmagnet creates a model of what's going on in your head. It predicts what memories have faded away, and what memories are still inside, allowing you to quickly get things in your head and keep them there. The more you use headmagnet, the better it gets at modeling what goes on in your head.

Know that you know. Create smart online flash cards that predict when you'll forget.

As you study your flashcards Headmagnet tracks the flashcard items you know or don't know. Those statistics are then used to predict how long and how often you will remember an item from a flashcard. Headmagnet provides three ways to study your flashcards; slideshow, self test, or normal test. In the slideshow you simply click through to see questions and answers on the same page. In self test you see one side of a flashcard then the other at your own pace. In the normal test the question side of your flashcards are shown and you have to type your answer.

online flashcards

Using examples from vacations to colonoscopies, Nobel laureate and founder of behavioral economics Daniel Kahneman reveals how our "experiencing selves" and our "remembering selves" perceive happiness differently. This new insight has profound implications for economics, public policy -- and our own self-awareness.

Fascinating discussion of happiness from a behavioral economics standpoint; hold on for the Q&A session afterwards, which is also interesting

Using examples from vacations to colonoscopies, Nobel laureate and founder of behavioral economics Daniel Kahneman reveals how our "experiencing selves" and our "remembering selves" perceive happiness differently

Vidéo TED : La mémoire et l'expérience par Ted Kahneman, Nobel d'Economie

"We think of our future as anticipated memories." Read about this talk on Bobulate.

TED Talks Using examples from vacations to colonoscopies, Nobel laureate and founder of behavioral economics Daniel Kahneman reveals how our "experiencing selves" and our "remembering selves" perceive happiness differently. This new insight has profound implications for economics, public policy -- and our own self-awareness.

"You might expect the child to plan for the future, think 'OK it's cold outside so the jacket will keep me warm.' But what we suggest is that this isn't what goes on in a 3-year-old's brain. Rather, they run outside, discover that it is cold, and then retrieve the memory of where their jacket is, and then they go get it."

RT @smashingmag: Last Day Dream - http://vimeo.com/4626809 - So sad, so strong, so powerful. [from http://twitter.com/idealic/statuses/1825634006]

42 second short film on life

42 seconds ...

Last Day Dream

Heart-warming.

Older people are better at solving problems, because they have more mental information to draw upon than younger people do. That's why those in their 50s and 60s are sage. They're the ones we turn to for the best advice, the ones we want to run our companies and our country.

"If you just repeat something again and again that requires your young child to prepare for something in advance, that is not likely to be effective," Munakata said. "What would be more effective would be to somehow try to trigger this reactive function. So don't do something that requires them to plan ahead in their mind, but rather try to highlight the conflict that they are going to face. Perhaps you could say something like 'I know you don't want to take your coat now, but when you're standing in the yard shivering later, remember that you can get your coat from your bedroom."

Toddlers listen, they just store the information for later use.

Toddlers listen, they just store the information for later use, a new study finds."What would be more effective would be to somehow try to trigger this reactive function. So don't do something that requires them to plan ahead in their mind, but rather try to highlight the conflict that they are going to face. Perhaps you could say something like 'I know you don't want to take your coat now, but when you're standing in the yard shivering later, remember that you can get your coat from your bedroom."

physical

Useful, in-depth discussion of how memory is handled on Windows and Linux with respect to Java Virtual Machines. How to diagnose memory problems; dealing with Java heap as well as native memory exhaustion issues. Source code / demo

Processors are described as being a certain number of bits. This normally refers to the size of the registers, although there are exceptions — such as 390 31-bit — where it refers to the physical address size. For desktop and server platforms, this number is 31, 32, or 64; for embedded devices and microprocessors, it can be as low as 4. The physical address size can be the same as the register width but could be larger or smaller. Most 64-bit processors can run 32-bit programs when running a suitable OS.

Ostatnio trafiłem na świetną stronę prezentującą sto dwadzieścia sposób na to, by poprawić pracę mózgu (http://litemind.com/boost-brain-power/). Jej autor pozwolił mi przetłumaczyć tą listę. Wiele wpisów zawiera linki do anglojęzycznych stron, zawierających uzupełnienie i szczegóły. Dodatkowo dodałem parę polskich odpowiedników.

Sposoby na poprawę pracy mózgu, nie żadna chemia

'Brain decline' begins at age 27 Concentration Mental abilities decline at a relatively young age, experts suspect Mental powers start to dwindle at 27 after peaking at 22, marking the start of old age, US research suggests. Professor Timothy Salthouse of the University of Virginia found reasoning, spatial visualisation and speed of thought all decline in our late 20s.

Mental powers start to dwindle at 27 after peaking at 22, marking the start of old age, US research suggests.

Thought that your mental prime years were in your thirties? Think again: http://news.bbc.co.uk/2/hi/health/7945569.stm [from http://twitter.com/mpondu/statuses/1340264706]

An overview of a study on the shape of our learning. I suppose it is no mistake that tertiary education systems follow the curve. "A seven-year study (published in the journal Neurobiology of Aging) reveals the average age at which the top performance was achieved as 22 in nine out of the 12 tests given. The first age at which there was any marked decline was at 27 in tests of brain speed, reasoning and visual puzzle-solving ability. Things like memory stayed intact until the age of 37, on average, while abilities based on accumulated knowledge, such as performance on tests of vocabulary or general information, increased until the age of 60."

Six more years to go before I get the dumb.

具体的にコードで言うと変数にnullを代入します。

メモリの解放をするには

メモリ解放の手引き

メモリ解放について。

In research published recently in Neuron, Marcos Frank, PhD, Assistant Professor of Neuroscience, at the University of Pennsylvania School of Medicine, postdoctoral researcher Sara Aton, PhD, and colleagues describe for the first time how cellular changes in the sleeping brain promote the formation of memories.

The key cellular player is the molecule N-methyl D-aspartate receptor (NMDAR), which acts like a combination listening post & gate-keeper. It both receives extracellular signals in the form of glutamate & regulates the flow of calcium ions into cells. Once the brain is triggered to reorganize its neural networks in wakefulness (by visual deprivation, eg), intra- & intercellular communication pathways engage, setting a series of enzymes into action w/in the reorganizing neurons during sleep. To start the process, NMDAR is primed to open its ion channel after the neuron has been excited. The ion channel then opens when glutamate binds to the receptor, allowing calcium into the cell. In turn, calcium, an intracellular signaling molecule, turns other downstream enzymes on and off. Some neural connections are strengthened as a result of this process, & the result is a reorganized visual cortex. &, this only happens during sleep.

If you ever argued with your mother when she told you to get some sleep after studying for an exam instead of pulling an all-nighter, you owe her an apology, because it turns out she's right. And now, scientists are beginning to understand why.

In research published recently in Neuron, Marcos Frank, PhD, Assistant Professor of Neuroscience, at the University of Pennsylvania School of Medicine, postdoctoral researcher Sara Aton, PhD, and colleagues describe for the first time how cellular changes in the sleeping brain promote the formation of memories. ... "We find that the biochemical changes are simply not happening in the neurons of animals that are awake," Frank says. "And when the animal goes to sleep it's like you’ve thrown a switch, and all of a sudden, everything is turned on that's necessary for making synaptic changes that form the basis of memory formation. It's very striking." The team used an experimental model of cortical plasticity – the rearrangement of neural connections in response to life experiences. "That's fundamentally what we think the machinery of memory is, the actual making and breaking of connections between neurons,” Frank explains

A compilation of some of the highlights of "Youngme, Nowme".

By Patricia Curtis Can't remember where you put your glasses? Blanked on your new colleague's name? "Forgetting these types of things is a sign of how busy we are," says Zaldy S. Tan, MD, director of the Memory Disorders Clinic at…

a really nice article on debugging

Amazing forensic methods to compare system cache in memory with image on disk.

The Misconception: Your opinions are the result of years of rational, objective analysis. The Truth: Your opinions are the result of years of paying attention to information which confirmed what you believed while ignoring information which challenged your preconceived notions.

RT @joegerstandt: RT @valdiskrebs: Great post on confirmation bias by @notsmartblog -- http://bit.ly/a2f5yq

This article needs a great big "citation needed" slapped on it. Yes, people need to think about what they post on the web, but no, that stuff will not stay around "forever." If anything, the web suffers from the opposite problem: memory loss.

"We’ve known for years that the Web allows for unprecedented voyeurism, exhibitionism and inadvertent indiscretion, but we are only beginning to understand the costs of an age in which so much of what we say, and of what others say about us, goes into our permanent — and public — digital files. The fact that the Internet never seems to forget is threatening, at an almost existential level, our ability to control our identities; to preserve the option of reinventing ourselves and starting anew; to overcome our checkered pasts....It’s often said that we live in a permissive era, one with infinite second chances. But the truth is that for a great many people, the permanent memory bank of the Web increasingly means there are no second chances — no opportunities to escape a scarlet letter in your digital past. Now the worst thing you’ve done is often the first thing everyone knows about you."

Use a lot of thought and caution before posting to the web...it never forgets and is a critical part of what others may see about your one-time identity...even if it was 40 years ago!

La Red significa "el fin del olvido". Súper interesante artículo en el NYTimes. http://nyti.ms/anOZh7 (para los que gustan de la tecno y...

By Jeffrey Rosen

Interesting article about how the Internet remembers everything we put in it and how it would be better both for us and our society if it forgot with time (like humans).

When historians of the future look back on the perils of the early digital age, Stacy Snyder may well be an icon. The problem she faced is only one example of a challenge that, in big and small ways, is confronting millions of people around the globe: how best to live our lives in a world where the Internet records everything and forgets nothing — where every online photo, status update, Twitter post and blog entry by and about us can be stored forever. With Web sites like LOL Facebook Moments, which collects and shares embarrassing personal revelations from Facebook users, ill-advised photos and online chatter are coming back to haunt people months or years after the fact. Examples are proliferating daily: there was the 16-year-old British girl who was fired from her office job for complaining on Facebook, “I’m so totally bored!!”; there was the 66-year-old Canadian psychotherapist who tried to enter the United States but was turned away at the border — and barred permanently from vi

How best to live our lives in a world where the Internet records everything and forgets nothing—where every online photo, status update, Twitter post and blog entry by and about us can be stored forever.

thx, lg :) RT @AmirKassaei: Great Read! NYTimes: The Web Means the End of Forgetting http://nyti.ms/anOZh7

NYTimes: The Web Means the End of Forgetting http://nyti.ms/anOZh7

The digital age is facing its first existential crisis: the impossibility of erasing your posted past and moving on.