viernes, 3 de agosto de 2012

Free knowledge: Online classes and the future of higher education


 




Education is a wonderful thing, the more you know the more you are capable of doing. But can the value of an education be measured in dollars? Universities promise to give their students the skills they will need to be successful later in life, but the fruits of the student’s labor become a diploma, a piece of paper as the evidence of higher education. The closely guarded power to issue this piece of paper has given universities and community colleges the ability to charge whatever they wish for it, limited only by the number of students they can attract.
Colorado State University charges more than $4,000 per semester for tuition to Colorado residents and more than $12,000 per semester to students from out of state. The actual cost of attendance is much higher. The cost of CSU after room and board, as estimated on their website is about $20,000 a year for in state students and $40,000 for out of state students.
There are lower cost options, such as correspondence classes at an open university, but these can still cost in excess of $3,000 a semester and do not provide the amenities of a traditional university. Community colleges are cheaper yet, costing only about $2,000 per semester.
These numbers all seem very high, but students are enticed by the idea of paying $80,000 now (CSU’s $20,000 in state cost of attendance for four years) in order to get a much better job later. The value of a bachelor’s degree, calculated by increased lifetime earnings, is usually considered to be somewhere in the millions.
According to Bloomberg Businessweek, the actual numbers are far lower. A student with a college education will, on average, make only about $300,000 more over the 30 years after they graduate than a student who did not seek higher education. This number is adjusted for the costs of attendance and dropout rate.
But perhaps the real value in higher education cannot be measured with a dollar sign or a value. The greatest thing the university teaches may not be math or arts or literature, but be a voracious appetite for knowledge, a consuming desire to learn.
Out of this desire for knowledge have come some extraordinary programs. TED, a non-profit organization devoted to “Ideas Worth Spreading,” has become a place to share ideas in 18 minutes, the time limitation of a TED Talk. iTunes U contains a wealth of information contributed by universities for distribution to anyone with an iTunes account. The Khan Academy provides education on everything from math to art history via videos on its webpage. Harvard University, and many other universities, including CSU, offer extensive online extension services and video lectures.
These programs all have two things in common; they are all in the pursuit of increasing knowledge, and they are all free. Universities are offering free programs and information online in larger amounts than ever before.
The Khan Academy offers an extensive video library, a large collection of interactive challenges and assessments on a multitude of topics. Every math problem on the site can be broken down, step-by-step and explained. Statistics about information covered and student achievements are all available. The Khan Academy is one of a growing number of online learning resources and the only thing that such courses do not offer their students is credit.
But it is only a matter of time. There are hundreds of TED talks, thousands of lectures available on iTunes U and Khanacademy.org, all available to anyone for free. Will universities continue to hold the sacred power of accreditation, or will free, community run online universities one day be able to offer an equal education and valid diplomas?

Caos, complejidad y cardiología


Caos, complejidad y cardiología

Publicado en Arch Cardiol Mex.2012; 82 :54-8 - vol.82 núm 01

Resumen

La ciencia es una disciplina en constante evolución. La medicina moderna está basada en la ciencia. El paradigma médico vigente es lineal y reduccionista. Existe una nueva teoría general avalada por cálculos computacionales avanzados, la teoría del caos y la complejidad. Esta nueva visión probablemente modificará la práctica de la medicina. La cardiología fue una puerta de entrada de la complejidad, al campo de la medicina. El caos y los fractales son fenómenos frecuentes en la fisiología cardiovascular. Además, los análisis computacionales de los ritmos cardiacos han permitido conocer mejor enfermedades complejas, muy frecuentes en la práctica clínica, que no eran entendibles mediante acercamientos lineales y reduccionistas. Tal es el caso de las disautonomías, incluyendo los síndromes de intolerancia ortostática, el síndrome X cardiaco y la fibromialgia, entre otros. Desde la perspectiva de la complejidad, se desprende una diferente actitud diagnóstica y terapéutica, el holismo científico.

Palabras clave 
Caos; Complejidad; Sistema nervioso autónomo; Fibromialgia; Sistemas adaptativos complejos; México.
 
Atte.
Dr.Máximo Cuadros Chávez

Universalidad, límites y la previsibilidad de las actuaciones de los medallistas de oro en los Juegos Olímpicos

Universalidad, límites y la previsibilidad de las actuaciones de los medallistas de oro en los Juegos Olímpicos 
Universality, limits and predictability of gold-medal performances at the olympic games.
Radicchi F.
Departament d'Enginyeria Quimica, Universitat Rovira i Virgili, Tarragona, Spain.
PLoS One. 2012;7(7):e40335. Epub 2012 Jul 12.

Abstract
Inspired by the Games held in ancient Greece, modern Olympics represent the world's largest pageant of athletic skill and competitive spirit. Performances of athletes at the Olympic Games mirror, since 1896, human potentialities in sports, and thus provide an optimal source of information for studying the evolution of sport achievements and predicting the limits that athletes can reach. Unfortunately, the models introduced so far for the description of athlete performances at the Olympics are either sophisticated or unrealistic, and more importantly, do not provide a unified theory for sport performances. Here, we address this issue by showing that relative performance improvements of medal winners at the Olympics are normally distributed, implying that the evolution of performance values can be described in good approximation as an exponential approach to an a priori unknown limiting performance value. This law holds for all specialties in athletics-including running, jumping, and throwing-and swimming. We present a self-consistent method, based on normality hypothesis testing, able to predict limiting performance values in all specialties. We further quantify the most likely years in which athletes will breach challenging performance walls in running, jumping, throwing, and swimming events, as well as the probability that new world records will be established at the next edition of the Olympic Games.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3395717/pdf/pone.0040335.pdf

 
Atentamente
Anestesiología y Medicina del Dolor

Bibliotecas. Alerta



 
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Heraldo de Aragon
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Pese a la Web, las bibliotecas platenses multiplican lectores
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La Mañana Neuquén
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Capacitación a responsables de Bibliotecas de escuelas
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Books Update NYT

The New York Times

August 3, 2012


Books Update

On the Cover of Sunday's Book Review

The star V838 Monocerotis's light echo.

'Why Does the World Exist?'

By JIM HOLT
Reviewed by SARAH BAKEWELL
Jim Holt explores the interzone between philosophy and scientific cosmology in trying to answer an ancient question: why there is something instead of nothing.

Also in the Book Review

'Einstein's Jewish Science'

By STEVEN GIMBEL
Reviewed by GEORGE JOHNSON
If you can look past anti-Semitism, Steven Gimbel suggests, maybe relativity is "Jewish science" after all.
Marilyn Monroe in 1955.

'Marilyn'

By LOIS BANNER
Reviewed by ZOË SLUTZKY
A feminist historian explores the contradictions of Marilyn Monroe's character.

'Too High To Fail'

By DOUG FINE
Reviewed by BILL MAHER
How legalizing cannabis could change America - culturally, politically and economically.

'Triburbia'

By KARL TARO GREENFELD
Reviewed by JAY McINERNEY
Karl Taro Greenfeld's novel observes the details of downtown life, circa 2008.
Lydia Netzer

'Shine Shine Shine'

By LYDIA NETZER
Reviewed by LIESL SCHILLINGER
An astronaut's wife is pushed to the brink in Lydia Netzer's novel.

'A Million Heavens'

By JOHN BRANDON
Reviewed by CHARLES BOCK
John Brandon's novel, set outside Albuquerque, delves into the metaphysic.
MATHEMATICAL EXCURSIONS TO THE WORLD'S GREATEST BUILDINGSBy Alexander J. Hahn. 317 pp. Princeton University. $49.50.In examining the crucial intersection between architectural design and his own field of study, Hahn, a mathematics professor, conducts an opulent historical and geographical tour. Above, the Basilica of Ste.-Madeleine in Vézelay, France.

Science Chronicle

By JASCHA HOFFMAN
New books by Allen Buchanan, John Brockman, William Poundstone and Lawrence Weschler.

'The Storytelling Animal'

By JONATHAN GOTTSCHALL
Reviewed by DAVID EAGLEMAN
Make-believe is more than fun and games, Jonathan Gottschall says; it helps us navigate life's complex social problems.

'You & Me'

By PADGETT POWELL
Reviewed by THOMAS MALLON
In Padgett Powell's novel, "two weirdly agreeable dudes" share their observations.
Simon Rich

'What in God's Name'

By SIMON RICH
Reviewed by PATRICK CASSELS
In Simon Rich's novel, God is C.E.O. of Heaven Inc.
Carlos Fuentes

'Vlad'

By CARLOS FUENTES. Translated by E. SHASKAN BUMAS and ALEJANDRO BRANGER.
Reviewed by JEFF VANDERMEER
Carlos Fuentes's Dracula is house hunting in Mexico City.
CRIME

Leave a Light On

By MARILYN STASIO
Tana French's "Broken Harbor" is a psychological suspense story about the dangers of suppressing unthinkable thoughts.
Brief shining moment: the Bradlees and the Kennedys at the White House, May 1963.

'Yours in Truth'

By JEFF HIMMELMAN
Reviewed by PHIL BRONSTEIN
A biography of Ben Bradlee illuminates his complexities.
From left: Rev. Jim Jones, Rev. Dr. A. E. Ubalde Jr. and Mayor George Moscone (November 1977).

'Season of the Witch'

By DAVID TALBOT
Reviewed by ELLEN ULLMAN
Fifteen tumultuous years in the life of San Francisco, from Altamont to the Super Bowl.
Protestors at Occupy Wall Street.

'The Price of Inequality'

By JOSEPH E. STIGLITZ
Reviewed by THOMAS B. EDSALL
Joseph E. Stiglitz considers the cultural and political consequences of concentrated wealth.
J. Courtney Sullivan

J. Courtney Sullivan: By the Book

The author of "Maine" and "Commencement" regrets reading "In Cold Blood": "I'm incapable of going anywhere remotely rural without being up all night worrying that every creaking floorboard is Dick and Perry."

Back Page

SKETCHBOOK | RICK MEYEROWITZ

The Girls of Summer

Gertrude Stein, Agatha Christie, Dorothy Parker and others as imagined on the baseball diamond.
Chris Hedges

Inside the List

By GREGORY COWLES
"Days of Destruction, Days of Revolt," a collaboration between the reporter Chris Hedges and the comics artist Joe Sacco - like an updated version of James Agee's "Let Us Now Praise Famous Men" - hits the hardcover nonfiction list at No. 8.

Editors' Choice

Recently reviewed books of particular interest.

Paperback Row

By IHSAN TAYLOR
Paperback books of particular interest.

Book Review Podcast

This week, Liesl Schillinger talks about Lydia Netzer's first novel, "Shine Shine Shine"; Julie Bosman has notes from the field; Thomas Edsall discusses Joseph Stiglitz's new book about economic inequality; and Gregory Cowles has best-seller news. Sam Tanenhaus is the host.
ArtsBeat

Editor's Note

Thanks for taking the time to read this e-mail. Feel free to send feedback; I enjoy hearing your opinions and will do my best to respond.
John Williams
Books Producer
The New York Times on the Web