algorithms

9 posts under this tag.

Mind Children, 2 excerpts 2
0
0
8
Sep
27

Hans Moravec’s Mind Children is dated at parts but it is as lyric, visionary, and deep as anything I’ve read. Here 2 excerpts I particularly enjoyed: one on robot bushes (forget many-armed Vishnu, this will be the avatar of the gods), the other on artificial life, spontaneous and deliberate (a great story of a virus put deep inside Unix by Ken Thompson himself and a subtle but intriguing example of spontaneous alife).

I’m experimenting with taking quick page snaps and bundling them into PDFs, so these are rather crude. No matter, it’s early days and I’ll get better at it. PDF/CBR is the new MP3!


Quants 2
0
0
7
Dec
08

For those armchair observers of the breathtaking world of quants and structured finance, as myself, Technology Review’s current issue carries a wonderfully didactic and gripping introduction, The Blow-Up: (pesky but FREE registration required).

“How many think spreads will widen?” she asked.

The hands of about half the smartest people on Wall Street shot up.

“And how many think they’ll narrow?”

The other half—equally smart—raised their hands.

“Well,” she said. “That’s what makes a market.”

If they didn’t know, nobody could.


Focused only in securitization, When it goes wrong, from The Economist (YubNub’s “eco“), is also a good overview and glimpse:

..it is hard to overstate the effect that securitisation has had on financial markets. Until the early 1980s, finance hewed to an “originate and hold” model. Banks generally held loans on their balance sheets to maturity; some debts were sold on loan-by-loan, but this market was small and lumpy. This began to give way to an “originate and distribute” model after America’s government-sponsored mortgage giants issued the first bonds with payments tied to the cash flows from large pools of loans.

Wall Street built on this innovation, and securitisation took off soon after, then paused before exploding in the 1990s.. It was given a lift by America’s savings-and-loan crisis, which encouraged mortgage lenders to jettison their riskier loans, and by new technologies, such as credit-scoring, that facilitated loan-pooling. Around 56% of America’s outstanding residential mortgages were packaged in this way, including more than two-thirds of the subprime loans issued in 2006. Thanks largely to securitisation, global private-debt securities are now far bigger than stockmarkets.

Answers.com (YubNub’s “a“), btw, is invaluable in navigating jargony fields like finance.

Marketing Challenge 2
0
0
7
Sep
21

For marketing-minded friends.



Your mission, if you choose to accept it, is to produce an ordered list of all the reasons you can think for Starbucks’s use of cash cards. (They’ve just been introduced in Mexico, though they’ve been around in the US for some 6 or so years). Something like:


# It’s Schultz’s next step for global domination: taking control of the currency.
# People will obsess about collecting them.
# ....

One-line items are enough, we’re aiming for breadth. Keep it simple.

Remember, this is about why Stbx does this, not why customers buy the cards (which is another mystery onto itself).

Submissions will be accepted until Sunday midnight, September 23th and should be sent to ely.parra@gmail.com. I, elzr.com, shall decide the winner based on the following criteria:

40% for originality and number of reasons

40% for how convincing the reasons are (this, sadly, ain’t no humor contest)

20% for the ordering (from most to least important)

Submissions are accepted in English, Spanish, or French. English is of course preferred but the choice of language will have no bearing on the judgement.

The winner will be announced at elzr.com/posts/Marketing-Challenge on Monday, September 24th. All lists shall be published in said post. The prize will be 25 dollars in Starbucks card credit.

You’re encouraged to resend this challenge to anyone who might have interesting thoughts on the subject. Anyone may participate. (Though Stbx card credit will probably not be very valuable for those living in countries where the local Starbucks don’t accept it yet, not to mention countries without Stbx.)

It may prove a fun marketing challenge. Happy listing!


Resolution:

Julio Sangabriel

# For creating Customer Databases  for CRM efforts.
# Offers a gigantic opportunity for Conjoint Advertising
# It makes easier for Customer tracking.
# Psicologicaly customer believe it to be easier to buy if they have a shop card… (which is no ttrue… you can still buy In SB the same easy way) and thus they buy in SB.
# It gives one or more channels for contacting directly the customers.
# It Will become customizable (people will start making them as they see fit)
# It Gives the people a sense of belonging and exclusivity.
# It Makes people believe to be VIP for having a club card from the most expensive coffee in the world.
# Creates Fashion.
# World Control… haha

Adolfo Rodriguez Navarro

# Crear lealtad- le permiten al consumidor sentirse mas involucrado con la compañia y de paso aseguran que el dinero que tiene planeado gastar en cafe solo lo use en ella.
# Abrirse a nuevos mercados- Al ser usada como gift card, la gente que la recibe que antes no consumia el producto se ve alentada a hacerlo, asi que los que la regalan terminan funcionando como agentes de starbucks.
# Financiamiento a traves del consumidor – Para que pedir creditos si tus clientes te pagan por servicios no demandados a un pequeño costo para ti?
# Dinero gratis- tarjetas que se pierden, personas que dejan de usarla, gift cards que nunca son usadas, al final ellos se quedan con el dinero sin dar nada a cambio.

So the winner is… Julio Sangabriel! I particularly enjoyed his #1, #2, #3, #5, #6 (it becomes an always-with-you embodiment of the brand). I must confess that the reason I started this challenge was because upon reading this Economist article on algorithms
, I had the epiphany that Julio’s #3, customer tracking, was Stbx’s true reason. It was not an opinion of anyone with whom I bounced the idea (nor did they thought it remotely important once I told them about it) so I can attest to it’s originality. Adolfo’s, I particularly enjoyed #2 and #3—I had thought myself of something like his #4, that is, credit lost-and-found money, thinking of it as finance money is an intriguing possibility.

I rather like this challenge-making thing, it’s like outsourcing thinking! Besides, it’s just nice to give things away.

Thanks a lot to those who participated and the many more who told me they thought this an interesting challenge (I was frankly afraid people would thought it stupid).

‘Till the next challenge! %(p)(But if you come up with more reasons—it is so much easier once you have somewhere to start—, then by all means add them in the comments.)%

Glorious nights 2
0
0
7
May
16

“I’ve always accepted my groggy mornings because they come with my glorious nights.”
—Alan BerlinerVSL

anglo latin; the origin of latin america as a word; my high school wasn’t bilingual, it was English with Spanish as a second language; I always say math and language are the same ability because they’re the same thing, math is just specialized talk about numbers; but then zoology is just talk about animals…; the difference is that math is, in a farly unparalleled way, advanced through language itself (as opposed to, say, zoology, which, advances chiefly through observation); the way forward in language is through logic; logic is syntax; understanding is synthesizing and paraphrasing; {an algorithm just like flooding to create a machine that understood, as previously defined—one wouldn’t even need to define what a word is}; Wikipedia syntax highlighting!

Glorious, thought-drunken night.

Science Map 2
0
0
7
Mar
22

A map of relations among scientific paradigms, this is a masterpiece of information design. Both1 data, algorithms, and design (particularly typography) are awe-inspiring. Read up on them on Seed magazine, which has an article on it and hosts the 3.5MB graph, and on Information Aesthetics, where you can buy (or soon will, they’re experiencing some technical difficulties) a gorgeous print for 10 bucks (shipping and handling included!).

1 Yes, I know! This “both” introduces three, not two, things. So shoot me. It felt so right.

Crisscross multiplying 2
0
0
7
Feb
18

This really won’t save you any work at all but it’s sure to baffle casual onlookers.

At heart is just the usual distributiveWP algorithm we all use when multiplying arabicsWP, rearranged and visually rewritten using the immediate correspondence of crisscrosses to multiplication: .

Star
The TTOEFL: The Turing Test of English as a Foreign Language 2
0
0
7
Jan
17

Turing!

Here’s a (controversial) idea for a language test inspired by the famous Turing test for artificial intelligenceWP:

a native speaker of language X engages in conversation with two other parties, one a native speaker of language X and the other a student of language X as a foreign language; if the judge cannot reliably tell which is which, then (and only then) can the student be said to speak language X.

The test could be easily constrained to test for more specific capabilities: one could test for written command of language X by only permitting written communications, test only for accent by limiting “communication” to the spoken repeating of the judge’s written sentences, and so on.

It is simply stated but almost a “thought test”WP—it could be done, but there would be a myriad practical complications and scaling would be a bitch. What’s important about it, though, is that it is a valid test to demand of (foreign) language learning: passing it should at least be its hypothetical goal.

The problem is that ridiculously few people would pass it if it where applied today. And because it seems impossibly difficult most people turn away, dismiss the test as wrong or irrelevant, and sink their heads in the sand (“what shouldn’t be, can’t be right”). Which only highlights the current sorry state of language education. It is NOT asking too much. It is not asking for exceptional performance—it doesn’t ask of you to be a Nobel-prize, a literati, or a rapper. It’s merely demanding average, pick-a-guy-from-the-street native-speaker capabilities. Why isn’t that a valid goal to ask of language education?

You could say that most people don’t need native-speaker level to start benefiting from a foreign language and that’s entirely true. But it is just as true that not reaching it is a serious, frustrating, even painful hurdle to communication. A hurdle that will plague ever more people the more the world shrinks. Some of the world’s smartest people can’t get their r’s right hard as they try. And we mock them for it. (Soon, we will be the mocked ones for not getting our intonations right.)

Well looked, Turing level is perhaps even a modest goal. We all possess it already in the language we are born into and we all contained within us the same language potentiality at birth. So it should be perfectly achievable and shouldn’t take nearly as much time as starting from zero.

Yes, I know. We are nowhere near knowing how to reach such a level efficiently. It’s too hard and too long a goal—currently. But we should at least strive for it. (And be honest with students on what the status quo of our language technology is: no more “Learn to speak Chinese in 21 days!”—for now.) Languages are some of the most complex and powerful artifacts we have created. It’s only to be expected that their learning is one of the most complex and difficult challenges we face.

But it is also one of our most rewarding (and valuable) experiences. I want to commoditize it.

Chances are we are on the brink of Turing level language translationELZR. Why aren’t we even close to practical Turing level language learning? I’d still want it.

Star
Flooding 2
0
0
6
Dec
05

When they arrived in his office and Abir explained the concept for what is now called the decoder, Carbonell was floored by its elegance. “In the few weeks that followed, I kept wondering, ‘Why didn’t I think of that? Why didn’t the rest of the field think of that?’ Finally I said, Enough of this envy. If I can’t beat them, join them.”

I’m floored too. (And envious!) What Meaningful Machines lyrically calls «flooding» in a recent Wired article, Me Translate Pretty One Day, is a stunningly beautiful translation algorithm, baffling in its simplicity.

Though if it’s simple to state and understand, it’s only because it relies on operations on a terrifying (computational, mathematical) scale. (Like the first time one invokes inside a theorem, say, the set of all possible sets, there’s a mixture of fright and awe—we can barely believe our moxie to write such thoughts.) In a very real way, the algorithm is written in Moore’s law language and if it escaped us all it’s mostly because our words are so shy, so inadvertently constrained by past assumptions.

Ah! How exciting! Machine language translation is on the horizon.

Same thing, two opinions 2
0
0
6
Aug
20

The contrast’s interesting ain’t it? Joel On Software’s Joel Spolsky sees Dell’s homepage as a textbook case of heavy-handed, rapacious marketing. A List Apart’s Nick Usborne, on the other hand, sees it as one of computer industry’s best examples of self-effacing design, respectful of its users and the now-fashionable right to self-identificationWP.



Dell doesn’t think like their users think. When you go to their website, the first question they ask is what kind of buyer you are: home, small business, large business, etc. I don’t know what I am! I guess I’m a small business, but home systems are usually cheaper, and I usually like to buy top of the line PCs, so maybe I need the Big Business section. This distinction is completely lost on me.

I want a PC. What difference does it make whether I’m a home buyer or a small business buyer? I suspect that they are asking me this because they want to charge businesses more than homes, and large businesses even more. To defeat their system, I choose “home.”

Joel Spolsky, Dell And Usability, November 14, 2000
(Dell’s homepage around that date)



Dell has what is probably the most visitor-centric site of all the computer manufacturers. For years now they have built a homepage that holds back on saying, “Look at us, we’re great.” Instead they devote a significant part of the page to an area where visitor can self-select.

The design and text on the page immediately recognizes that some people are looking for home computers, while others are looking for networks for local government offices. Both audiences and more are addressed. The Dell.com page says, in effect, “Yes, you’re
in the right place. Yes, we can help you. Yes, self-identify and please click here so we can help you find exactly what you need.”