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Heroes (We Could Be)


The Pictorial Key to the Tarot Index

The Pictorial Key to the Tarot


Category Theory in Context | The n-Category Café

In my final year at Harvard and again in my first year at Johns Hopkins, I had an opportunity to teach an advanced undergraduate/beginning graduate-level topics course entitled “Category Theory in Context.” Its aim was to provide a first introduction to the basic concepts of category theory — categories, functors, natural transformations, the Yoneda lemma, limits and colimits, adjunctions, monads, and Kan extensions — while simultaneously discussing the implications of these ideas in a wide variety of areas of mathematics on which category theory sheds light.

I thought teaching this course would provide a fun opportunity to collect as many examples of this kind as I could, for which I solicited widely — more about this below. This provided the impetus to write lecture notes. And now they have been published by Dover Publications in their new Aurora: Modern Math Originals series.

I extremely grateful to Dover for granting me permission to host a free PDF copy of the book on my website. This version is in some sense even better than the published version, in that I have been able to correct a handful of typos that were discovered after the print version was already in press.

-- Anonymous 2016-11-18 12:26 UTC


[1]

Another Look At Depression: An Alternative Perspective
By: Debbie L. Whittle
What if depression was viewed not as an illness, but rather, a call; a call from your
own soul? Is it possible there is a gift in depression? We are told that depression is
an illness; one involving brain chemistry. Is it possible to view depression from
another perspective? Is it possible that depression can be viewed as part of a larger
life cycle? Is it possible to see beyond appearances and perceive a higher vision, a
vision of meaning and purpose?


The Year of Conquering Negative Thinking - The New York Times

If you’re having trouble challenging your negative thoughts, try this approach. Imagine that your friend is the one who received the bad news. What advice would you give him or her? Now think of how that advice might apply to you.

-- Anonymous 2017-01-10 12:35 UTC


16 Psyche - Wikipedia

16 Psyche is one of the ten most-massive asteroids in the asteroid belt. It is over 200 kilometers in diameter and contains a little less than 1% of the mass of the entire asteroid belt. It is thought to be the exposed iron core of a protoplanet.[5] It is the most massive metallic M-type asteroid. Psyche was discovered by the Italian astronomer Annibale de Gasparis on 17 March 1852 from Naples and named after the Greek mythological figure Psyche.[6]

The first fifteen asteroids to be discovered were given symbols by astronomers as a type of shorthand notation. Psyche was given an iconic symbol, as were several other asteroids discovered over the next few years. This symbol , a semicircle topped by a star, represents a butterfly's wing, symbol of the soul (psyche is the Greek word for 'soul'), and a star.

-- Anonymous 2017-01-10 12:38 UTC


An Ancient and Proven Way to Improve Memorization; Go Ahead and Try It - The New York Times

the best memorizers place the most flamboyant, bizarre, crude and lewd images and scenes (and their actions) in their memory palaces. The more distinctive, the more easily they’re recalled. This is why the Puritans recoiled from the method of loci — they knew students were relying on “impure” and idolatrous imagery

-- Anonymous 2017-01-10 12:47 UTC


ZhurnalyWiki: My Religion

widening the skirts of light

-- Anonymous 2017-01-13 10:26 UTC


Richard P. Feynman - Nobel Lecture: The Development of the Space-Time View of Quantum Electrodynamics

I would like to interrupt here to make a remark. The fact that electrodynamics can be written in so many ways - the differential equations of Maxwell, various minimum principles with fields, minimum principles without fields, all different kinds of ways, was something I knew, but I have never understood. It always seems odd to me that the fundamental laws of physics, when discovered, can appear in so many different forms that are not apparently identical at first, but, with a little mathematical fiddling you can show the relationship. An example of that is the Schrödinger equation and the Heisenberg formulation of quantum mechanics. I don't know why this is - it remains a mystery, but it was something I learned from experience. There is always another way to say the same thing that doesn't look at all like the way you said it before. I don't know what the reason for this is. I think it is somehow a representation of the simplicity of nature. A thing like the inverse square law is just right to be represented by the solution of Poisson's equation, which, therefore, is a very different way to say the same thing that doesn't look at all like the way you said it before. I don't know what it means, that nature chooses these curious forms, but maybe that is a way of defining simplicity. Perhaps a thing is simple if you can describe it fully in several different ways without immediately knowing that you are describing the same thing.

-- Anonymous 2017-01-15 10:44 UTC


Richard P. Feynman - Nobel Lecture: The Development of the Space-Time View of Quantum Electrodynamics

Many different physical ideas can describe the same physical reality. Thus, classical electrodynamics can be described by a field view, or an action at a distance view, etc. Originally, Maxwell filled space with idler wheels, and Faraday with fields lines, but somehow the Maxwell equations themselves are pristine and independent of the elaboration of words attempting a physical description. The only true physical description is that describing the experimental meaning of the quantities in the equation - or better, the way the equations are to be used in describing experimental observations. This being the case perhaps the best way to proceed is to try to guess equations, and disregard physical models or descriptions. For example, McCullough guessed the correct equations for light propagation in a crystal long before his colleagues using elastic models could make head or tail of the phenomena, or again, Dirac obtained his equation for the description of the electron by an almost purely mathematical proposition. A simple physical view by which all the contents of this equation can be seen is still lacking.

Therefore, I think equation guessing might be the best method to proceed to obtain the laws for the part of physics which is presently unknown. Yet, when I was much younger, I tried this equation guessing and I have seen many students try this, but it is very easy to go off in wildly incorrect and impossible directions. I think the problem is not to find the best or most efficient method to proceed to a discovery, but to find any method at all. Physical reasoning does help some people to generate suggestions as to how the unknown may be related to the known. Theories of the known, which are described by different physical ideas may be equivalent in all their predictions and are hence scientifically indistinguishable. However, they are not psychologically identical when trying to move from that base into the unknown. For different views suggest different kinds of modifications which might be made and hence are not equivalent in the hypotheses one generates from them in ones attempt to understand what is not yet understood. I, therefore, think that a good theoretical physicist today might find it useful to have a wide range of physical viewpoints and mathematical expressions of the same theory (for example, of quantum electrodynamics) available to him. This may be asking too much of one man. Then new students should as a class have this. If every individual student follows the same current fashion in expressing and thinking about electrodynamics or field theory, then the variety of hypotheses being generated to understand strong interactions, say, is limited. Perhaps rightly so, for possibly the chance is high that the truth lies in the fashionable direction. But, on the off-chance that it is in another direction - a direction obvious from an unfashionable view of field theory - who will find it? Only someone who has sacrificed himself by teaching himself quantum electrodynamics from a peculiar and unusual point of view; one that he may have to invent for himself. I say sacrificed himself because he most likely will get nothing from it, because the truth may lie in another direction, perhaps even the fashionable one.

But, if my own experience is any guide, the sacrifice is really not great because if the peculiar viewpoint taken is truly experimentally equivalent to the usual in the realm of the known there is always a range of applications and problems in this realm for which the special viewpoint gives one a special power and clarity of thought, which is valuable in itself. Furthermore, in the search for new laws, you always have the psychological excitement of feeling that possible nobody has yet thought of the crazy possibility you are looking at right now.

So what happened to the old theory that I fell in love with as a youth? Well, I would say it's become an old lady, that has very little attractive left in her and the young today will not have their hearts pound anymore when they look at her. But, we can say the best we can for any old woman, that she has been a very good mother and she has given birth to some very good children. And, I thank the Swedish Academy of Sciences for complimenting one of them. Thank you.

-- Anonymous 2017-01-15 10:53 UTC


Student ID Cards



"Nothing happens next. This is it." - New Yorker Cartoon Premium Giclee Print by Gahan Wilson at Art.com

-- Anonymous 2017-01-24 13:01 UTC


Gaslighting: Know It and Identify It to Protect Yourself | Psychology Today

Gaslighting: Know It and Identify It to Protect Yourself

by Stephanie Sarkis

  1. They tell you blatant lies.
  2. They deny they ever said something, even though you have proof.
  3. They use what is near and dear to you as ammunition.
  4. They wear you down over time.
  5. Their actions do not match their words.
  6. They throw in positive reinforcement to confuse you.
  7. They know confusion weakens people.
  8. They project.
  9. They try to align people against you.
  10. They tell you or others that you are crazy.
  11. They tell you everyone else is a liar.

-- z 2017-01-30 11:56 UTC


See the Person Behind the Eyes - Dr. Rick Hanson

Sensing the deepest layers in people can nourish you in other ways, too. For example, I had a relative with a big heart but a difficult personality that drove me a little crazy. Finally, I started to imagine that being with her was like looking at a bonfire through a lattice covered with thorny vines. I focused on the love shining through and warming my own heart, and didn’t get caught up in the vines. That helped both of us a lot.

-- Anonymous 2017-03-30 01:09 UTC


Invader Zim - Wikipedia

an extraterrestrial named Zim from the planet Irk, and his mission to conquer Earth


Snow Crash - Wikiquote

"You don't respect those people very much, Y.T., because you're young and arrogant. But I don't respect them much either, because I'm old and wise."
Uncle Enzo and Y.T., discussing the predominantly suburban Young Mafia, Chapter 21

-- Anonymous 2017-04-06 12:03 UTC


Performance Curve Database

-- Anonymous 2017-04-06 19:39 UTC


ZhurnalyWiki: 0-1

"transience"? - or "transcendence"?

or both!

-- z 2017-04-18 09:23 UTC


Illustrations for "Master and Margarita"

Illustrations for "Master and Margarita"

Illustrations something on the Internet sea, but really good, at first glance, not so much. However, as we know, he who seeks will always find. Here is my collection of illustrations collected by various artists - both recognized masters like Orinyanskogo or Kalinowski, and not so well-known to the public authors. This collection, as far as I know, the biggest on the Internet. I hope, looking at these pictures, you will not get less pleasure than I do.

-- Anonymous 2017-04-23 09:51 UTC


Bayes' rule in Haskell, or why drug tests don't work | Random Hacks

A very senior Microsoft developer who moved to Google told me that Google works and thinks at a higher level of abstraction than Microsoft. "Google uses Bayesian filtering the way Microsoft uses the if statement," he said. -Joel Spolsky

-- Anonymous 2017-05-03 14:20 UTC


In Your Eyes (Peter Gabriel song) - Wikipedia

Love, I don't like to see so much pain
So much wasted and this moment keeps slipping away
I get so tired of working so hard for our survival
I look to the time with you to keep me awake and alive

-- Anonymous 2017-05-04 14:41 UTC


short stories - Analog magazine story from late 60s/early 70s. Zen/Psychic culture defeats an invasion - Science Fiction & Fantasy Stack Exchange

I think this may be "Facts to Fit the Theory" by Christopher Anvil. I found it in the collection "Interstellar Patrol II - The Federation of Humanity" It can be found here.

This is a short story, published in 1966, in ANALOG. There is a planet under threat by evil alien invaders, and the inhabitants of the planet were both pacifists (practicing 'self-control') and opposed to the methods of the Federation, who was otherwise offering to bring them under protection. There is a series of hijinks, wherein the federation tries to get a treaty signed (to save them from the invaders) but which are mysteriously foiled by the inhabitants, due to religious objections.

The invasion happens, or at least the evil aliens land, but each aggressive act they attempt is foiled by seemingly-natural causes (while the inhabitants fail to otherwise fight back), until finally the younger colonists lose their tempers and summon storms & the like to interrupt a large ceremony with a planned atrocity (meant to subdue any resistance). The local adults do scold them for lack of self control and the other damage caused by the large storms. The story ends with the federation observers trying to figure out how to report this turn of events.

-- Anonymous 2017-05-08 12:39 UTC


Competence vs Confidence


No other understanding is necessary ~ Bankei Yotaku - Just Dharma Quotes

No other understanding is necessary ~ Bankei Yotaku
Don’t hate the arising of thoughts or stop the thoughts that do arise. Simply realize that our original mind, right from the start, is beyond thought, so that no matter what, you never get involved with thoughts. Illuminate original mind, and no other understanding is necessary.

Bankei Yotaku

from the book Bankei Zen: Translations from the Record of Bankei

translated by Peter Haskel

-- Anonymous 2017-07-01 15:41 UTC


[2]

Alice, of Lewis Carroll’s Alice’s Adventures in Wonderland (1865), Sara Crewe of Frances Hodgson Burnett’s A Little Princess (1905), and Anne, of L.M. Montgomery’s Anne of Green Gables (1911) all exhibit metacognition and egocentrism while acting on their escapist impulses.

-- Anonymous 2017-07-04 16:54 UTC


Episode 034: Systems Thinking in the Real World – Greater Than Code

I’ve been thinking a lot about one of the ideas in the Fifth Discipline and I think I might have gotten us out of the Fifth Discipline field book. But one of the ideas that Peter Senge brings up is to think of a learning organization as this hybrid between a business and a school. If you imagine that you’re learning so much in the context of your job that it feels like you’re going to school and mastery is just baked into part of your job, the union of those two systems is what a learning organization is or characteristically would look like.


Gonville and Caius College, Cambridge - Wikipedia

the college's three gates, symbolising the path of academic life. On matriculation, one arrives at the Gate of Humility (near the Porters' Lodge). In the centre of the college one passes through the Gate of Virtue regularly. And finally, graduating students pass through the Gate of Honour

-- Anonymous 2017-07-06 14:25 UTC


Probabilism - Wikipedia

In modern usage, a probabilist is someone who believes that central epistemological issues are best approached using probabilities.[clarification needed] This thesis is neutral with respect to whether knowledge entails certainty or whether skepticism about knowledge is true.

-- Anonymous 2017-07-20 13:39 UTC


Episode 039: The B-Side of Software Development with Scott Hanselman – Greater Than Code

ASTRID: Well, I was thinking what you said about how ridiculous it is, this concept of a 10X engineer. I was thinking about why that could be ridiculous. I think there’s this thing that we do, especially in America where we have this idea of a self-made man and you’re supposed to be super-intelligent and able to do everything all by yourself and the more you can do by yourself, the more like a hero you seem to become. But that’s not the truth about how we do things for real in this country.
Usually what happens is that a group of people who are not all like superheroes. This group of people who are little bit better than average do something incredible. That’s what normally happens but we kind of have this fairy tale about how this one person who has all these super abilities made the world changed.

-- Anonymous 2017-07-27 12:13 UTC


Episode 039: The B-Side of Software Development with Scott Hanselman – Greater Than Code

JESSICA: Yeah. Also, I think systems thinking is both the biggest thing that we’re coming to in code and that helps us more than anything with creating software systems. It’s also a fascinating thing that’s coming out of code because we finally have the opportunity to really study systems because we can change them so fast. My secret hope — well, it’s not very secret — is the software industry can change the world by teaching all of us more about systems thinking.
SCOTT: I think that those are very reasonable thing to hope for. I think that we need to catch the kids before they’re 10 because after having now raised two kids up to 11, I realized that a 10-year head start is an eternity. You can’t snatch a 20-year old out of school in a trade and make them the same developer. You could make them developers, put them in a bootcamp but they will be different people with different paths. It’s hard to teach systems thinking if one has spent 20 years of their life, not thinking about systems. Bootcamps will teach you ‘for’ loops and syntax but you’ll always be a little bit behind, unless it’s naturally coming to you. My kids can’t code. It’s too early. I keep them off the computer as much as possible.
JESSICA: But they can problem solve.
SCOTT: They can problem solve. There are systems thinking. I have conversations with my nine-year old because we listen to a podcast in the car, listen to Marketplace which is his favorite podcast. He will talk to you about currency fluctuations and how the dollar here goes against South African Rand and stuff like that and why those things matter but I couldn’t write ‘for’ loops to save his life. I would argue that they can pick up the syntax at some point but you have to get systems thinking early. We need to teach systems thinking at first grade and second grade.
ASTRID: I really like the focus on the systems thinking and the problem solving because I think it is way more inclusive. I think there is a lot of people who are very intimidated by the idea of trying to learn how to code but they are solving problems and making decisions all the time and I don’t think that they realize that those things are related. They think they’re very separate things and they don’t see that if they can bring them together, it’s a very powerful thing.


Category Theory and Context: An Interview with Emily Riehl | PhD + epsilon

and so I’ve always focused more on working well than on working long hours. My main time management strategy is to start work on the thing that is due the soonest last

-- Anonymous 2017-08-20 10:11 UTC


When Kids Have Structure for Thinking, Better Learning Emerges | MindShift | KQED News

important “thinking moves” that lead to understanding are:

Naming: being able to identify the parts and pieces of a thing
Inquiry: questioning should drive the process throughout
Looking at different perspectives and viewpoints
Reasoning with evidence
Making connections to prior knowledge, across subject areas, even into personal lives
Uncovering complexity
Capture the heart and make firm conclusions
Building explanations, interpretations and theories.


Killing the Hydra » Mark Hyun-ki Kim

Killing the Hydra

20 m
In this long-overdue inaugural post, I would like to talk about the Kirby–Paris Hydra game, which involves killing off a particularly vicious modern variant of the Lernaean Hydra. This post is an extended version of the lecture I gave at the 2012 Courant Splash and is essentially a less technical rewrite of the paper “Accessible Independence Results for Peano Arithmetic” by Laurie Kirby and Jeff Paris. I learned about the Hydra game from Simon Thomas, who delivers an annual lecture on this topic at the Rutgers freshman-sophomore mathematics seminar.

1. The Hydra Game
Let us begin with a tale from Greek mythology.

...


Periventricular White Matter Lesions

Cerebral white matter lesions are common, alarming, and often called "incidental" by physicians. Perhaps for this reason, the author of this page (Dr. Hain) has been emailed several times with vigorously phrased requests to weaken the language concerning the cognitive consequences of white matter lesions. I just report what the literature has to say, and unfortunately, "it is what it is". Still, in response, I have adjusted the language in some places to use more "academic" terms for reduced mental function.

-- Anonymous 2017-11-09 11:04 UTC


Questions and Answers ​in MRI - MRI Questions & Answers; MR imaging physics & technology

Welcome to the Questions and Answers in MRI Website!

-- Anonymous 2017-11-09 11:05 UTC


Waiting Is

"Waiting Is"—a phrase immortalized in Robert Heinlein's celebrated sci-fi novel Stranger in a Strange Land.

For most of us waiting is not easy, often a bore. Waiting for a bus or train, we look for something to do to pass the time. Sitting in a doctor's waiting room, we idle away the minutes thumbing through magazines of no particular interest.

We want the waiting to be over with, so that we can get on with whatever is the next task at hand. Yet in treating waiting this way, we deny ourselves a most valuable opportunity.

Pure waiting, not waiting for any event to happen, just waiting without wanting, can be a profound spiritual practice.

When you simply wait, not waiting for anything in particular, not wishing things were different than than they are, the mind relaxes. And, as you let go of wanting, you will probably find your awareness of the present moment expanding.

Many, from Buddha to Ram Dass and Eckart Tolle, have encouraged us to be more aware of the present, to "be here, now". And numerous practices aim to help us become more aware of the present. Most, however, lead to focussing of the attention on some aspect of the present—the breath, a visual object, a mantra. The focus may be effortless, nevertheless it is there, a very faint directing of the attention.

With pure waiting, on the other hand, there is no attempt to be aware of any particular aspect of the present. Instead, with nothing to do, no particular thing to wait for, there is space for more of the present to reveal itself. We begin to notice aspects of our world we were not aware of before—the sound of a clock, or a distant conversation; a tree gently waving in the breeze; the touch of clothes against the skin. It does not matter what. It will probably be different every time, simply because the present is different from one moment to the next.

As you get the hang of simply waiting, you will find yourself being present in a relaxed, innocent, undirected way.

So the next time you have to wait for something, use the time as an opportunity to become more awake. Instead of waiting for that something, simply wait. No expectations. Simply stopping, and waiting, with an open mind.

Nor do we need to wait for a late bus or be sitting in a "waiting room" before we can practice waiting. Any moment of the day we can choose to pause for a while and simply wait.

Waiting without expectation for whatever is next. Maybe a bird flies past the window. Perhaps the refrigerator starts up. Or we find we have wandered off on some thought. It doesn't matter. Waiting is.

You can start right now. Pause. Take a breath. Relax... And wait...

Date created: May 20, 2008

-- z 2017-11-24 13:28 UTC


Building the Understanding of the Effects of Tai Chi Training on Walking in Older People | NCCIH

The team found that the tai chi experts had gait dynamics indicative of better gait health. Six months of tai chi training led to a slight trend in the same direction, but it didn’t reach statistical significance. Tai chi was not associated with gait speed. More tai chi class attendance and home practice appeared to be of some benefit (though this did not reach statistical significance). The authors noted that tai chi may exert its effects by maintaining or improving our flexibility to respond and adapt to unpredictable changes in terrain, stimuli, and stresses when we walk.

-- Anonymous 2017-12-04 14:33 UTC


Truth, Justice and (Fill in the Blank) - The New York Times

There's no reason to be upset. Superman is right back where he began: fighting a never-ending battle for truth and justice. That should be enough to occupy any man. Even a Superman.

-- Anonymous 2017-12-15 10:31 UTC


Neuroscape - Bridging the gap between neuroscience and technology.

Neuroscape uses a cutting-edge approach to improving brain function – building a bridge between neuroscience and consumer friendly technologies.Take a peek inside our center to see how video games are being developed to support treatment of brain disorders such as ADHD, Autism, Depression, Multiple Sclerosis, Parkinson’s and Alzheimer’s Disease. Neuroscape Research Labs are state-of-the-art research suites designed to study novel neuro-diagnostic and therapeutic approaches, with the primary goal of driving the rapid translation of neuroscience to real-world solutions.

-- Anonymous 2017-12-18 14:03 UTC


Quote by Samuel Beckett: “Perhaps my best years are gone. When there was ...”

“Perhaps my best years are gone. When there was a chance of happiness. But I wouldn't want them back. Not with the fire in me now. No, I wouldn't want them back.”

― Samuel Beckett, Krapp's Last Tape & Embers

-- Anonymous 2017-12-23 16:45 UTC


Krapp's Last Tape : Smithsonian Institution : Free Download & Streaming : Internet Archive

performance video

-- Anonymous 2017-12-24 11:13 UTC



Epistemic closure - Wikipedia

Epistemic closure[1] is a property of some belief systems. It is the principle that if a subject {\displaystyle S} knows {\displaystyle p} , and {\displaystyle S} knows that {\displaystyle p} entails {\displaystyle q} , then {\displaystyle S} can thereby come to know {\displaystyle q} . Most epistemological theories involve a closure principle and many skeptical arguments assume a closure principle.

On the other hand, some epistemologists, including Robert Nozick, have denied closure principles on the basis of reliabilist accounts of knowledge. Nozick, in Philosophical Explanations, advocated that, when considering the Gettier problem, the least counter-intuitive assumption we give up should be epistemic closure. Nozick suggested a "truth tracking" theory of knowledge, in which the x was said to know P if x's belief in P tracked the truth of P through the relevant modal scenarios.[2]

A subject may not actually believe q, for example, regardless of whether he or she is justified or warranted. Thus, one might instead say that knowledge is closed under known deduction: if, while knowing p, S believes q because S knows that p entails q, then S knows q.[1] An even stronger formulation would be as such: If, while knowing various propositions, S believes p because S knows that these propositions entail p, then S knows p.[1] While the principle of epistemic closure is generally regarded as intuitive,[3] philosophers such as Robert Nozick and Fred Dretske have argued against it.

-- Anonymous 2018-01-09 10:56 UTC


What's the difference between data science, machine learning, and artificial intelligence? | R-bloggers

When you’ve written the same code 3 times, write a function

When you’ve given the same in-person advice 3 times, write a blog post

— David Robinson (@drob) November 9, 2017

-- Anonymous 2018-01-12 19:39 UTC


Why People Really Quit Their Jobs

Crafting Jobs for Enjoyment
Many of us have unanswered callings at work — passions that we didn’t get to pursue in our careers. Whether we lacked the talent, the opportunity, or the means to make them our occupations, landing in a different career doesn’t make these passions disappear. They linger, like the professional version of the one who got away. And since we spend the majority of our waking hours at work, there isn’t always time to pursue these unanswered callings as hobbies. So we look for ways to bring our passions into our jobs. Personally, we know a lawyer who missed his dream of being a pilot and so sought out aviation cases, and a teacher who walked away from a music career but brings a guitar to class. But inside organizations, people often need support to craft their jobs.