Mostrando entradas con la etiqueta México. Mostrar todas las entradas
Mostrando entradas con la etiqueta México. Mostrar todas las entradas

lunes, 15 de diciembre de 2014

Crean red para jóvenes científicos latinoamericanos


Crédito de la imagen: Martín de Ambrosio


[BUENOS AIRES] “Las asociaciones de jóvenes científicos de Chile y México tiene los mismos objetivos y hasta el mismo nombre (+Ciencia), pero ni siquiera sabían de la existencia de la otra, ahí actuamos nosotros”, dirá luego Marga Gual Soler, cuando todo haya terminado.

Antes, durante más de tres horas, jóvenes investigadores —esa categoría tan elusiva— de la región mostraron sus esfuerzos personales y organizativos para llevar adelante proyectos. 

Fue en la doble sesión “Foro de ciencia joven en América Latina y el Caribe”, de la Asociación Mundial de Jóvenes Científicos (WAYS-Unesco), que reunió a una docena de participantes de Argentina, Chile, Puerto Rico, México y España, entre otros, en la jornada final del Congreso Iberoamericano de Ciencia, Tecnología, Innovación y Educación (12-14 de noviembre), en el Aula Magna de la Facultad de Derecho de la UBA. 

Gual Soler, que trabaja en la Asociación Estadounidense para el Progreso de las Ciencias (AAAS, en su sigla en inglés), se guardó para el mismísimo final el anuncio del lanzamiento de WAYS-LAC, la versión latinoamericana de un emprendimiento para dar soporte institucional a jóvenes investigadores que en ocasiones no lo tienen en países en vías de desarrollo y que ya funciona en otras regiones desde hace una década. 

Incluso hay una página web en versión beta disponible (www.wayslac.org). ¿El objetivo? Articular, dar visibilidad y proporcionar una voz colectiva a las organizaciones que la componen. 

Según cuenta Gual Soler, la financiación es incipiente y se cuentan apenas con recursos para algunos congresos y foros como el de Buenos Aires, siempre con el paraguas de la UNESCO. Pero es solo el comienzo: “Queremos articular, por ejemplo, con universidades de Estados Unidos y la Red Pop y armar un tejido que nos permita escribir nuestros propias becas de financiamiento”, dijo Gual Soler. 

El paraguas mencionado serviría para la química argentina Victoria Flexer, que dejará su trabajo en Bélgica para radicarse en el norte de su país, en Jujuy, en un mega laboratorio para investigar sobre litio, con los problemas que suelen tener becarios y post-becarios. 

O para sumar el inteligente entusiasmo de Fernando Valiente Echeverría quien impulsa Más Ciencia para Chile, organización que nació en 2007 por una protesta por salarios pero que trascendió ese pedido: “Queremos más institucionalidad en nuestro país, que haya un Ministerio de Ciencia independiente de Economía, y asumir un compromiso con la comunicación científica a la comunidad”, mencionó. 

O como José Antonio Alonso Pavón, parte de Más Ciencia México, que busca cuestionar la ciencia del modo que se la hace en su país, “sin apoyos del gobierno federal, con indiferencias que llevan a que a la gente no le parezca relevante la ciencia y crean que los científicos somos peligrosos, siempre a punto de hacer detonar algo en un laboratorio”. 

O Mónica Feliú-Mójer, que desde el archipiélago boricua busca que los científicos comuniquen a la sociedad sus conocimientos, y así armó la asociación sin fines de lucro Ciencia Puerto Rico. 

Hasta hubo espacio para la historia de Javier Santaolalla, del colectivo científico-humorístico The Big Van Theory, que contó sus hazañas y desventuras como joven investigador en el CERN de Suiza y luego en Brasil. Porque la ciencia con humor entra, y si está organizada mucho mejor.

ORIGINAL: SciDevNet

17/11/14



martes, 26 de noviembre de 2013

La comida de insectos se industrializa y tiene mucho futuro por delante





El aviso de los organismos internacionales de alimentación queda claro: aunque existan más de mil millones de personas con exceso de peso y sobrealimentadas en el planeta, también existen otros mil millones que cada día se acuestan con hambre. Los alimentos en la actualidad están desequilibradamente repartidos, pero es que si la tendencia continúa así, según los estudios oficiales, la población planetaria no contará con viandas suficientes cuando alcancemos la cifra de 9.000 millones de personas, prevista para el 2050. Se buscan con urgencia soluciones para garantizar al mundo que todos tendremos acceso a una alimentación suficiente, segura y nutritiva.

Un equipo de estudiantes canadienses (Montreal) llamado Food Group Aspire, procedente de la universidad McGill, ha recibido el suculento premio Hult 2013 para poner en marcha su idea, cuyo fin es evitar esas previsibles hambrunas a las que ya se empieza a temer. Su objetivo: crear una industria global centrada en la elaboración de alimentos a partir de insectos, desde harina hasta bichos pasados a la parrilla. ¿Será este el destino de la cocina humana?

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“Cuando nos presentamos al concurso vimos que el objetivo era ‘hacer frente a la inseguridad alimentaria’, cuenta Mohammed Ashour, líder y director del equipo. “Lo cierto es que después de hacer una lluvia de ideas solo llegábamos a soluciones aburridas y algo inútiles, así que decidimos buscar ideas locas, y un amigo nos habló de la posibilidad de comer insectos. Con un poco de investigación nos dimos cuenta de que muchas personas consumen insectos estacionalmente y que son nutritivos”.

En concreto, son más de 2.000 especies de insectos las que se comen en el planeta y son parte de la alimentación de dos millones y medio de personas, según Naciones Unidas (NU). El pasado enero un grupo de NU para la Agricultura y la Alimentación (FAO) formado por 60 expertos internacionales -en biología, nutrición y entomofagia- postularon que “comer insectos es bueno” porque son “son nutritivos, variados, económicos y hasta deliciosos”; y segundo, porque son una “vía para luchar contra el hambre” en este planeta de demografía en vertiginoso aumento.

Por ser los primeros en idear una industria formal con intención de desarrollar esa oportunidad, Food Group Aspire (compuesto por Ashour, Shobhita Soor, Zev Thompson, Jesse Pearlstein y Gabe Mott, un equipo multidisiplinar) fue el elegido en los Hult entre los 10.000 proyectos presentados.

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“Con el cultivo, procesamiento y venta de insectos comestibles ofreceremos a las comunidades urbanas humildes un mejor acceso a una fuente eficiente y sostenible de proteínas y nutrientes”, cuenta el líder del grupo. “¿Suena loco? Lo es y no lo es”.

“Nuestra intención es formalizar los mercados informales existentes y promover prácticas innovadoras de cultivo de insectos”, especifica Thompson, otro de los miembros. Su sistema consiste en enseñar a los habitantes de los países con mayor escasez alimentaria a procesar a gran escala la producción de insectos para crear harina, derivados de insectos, insectos asados y también sembrar la semilla que haga de esto un producto introducido formalmente en el mercado.

Para dar con el sistema perfecto, los universitarios visitaron países consumidores de bichos como México, Tailandia o Kenia, elaboraron diferentes técnicas de trabajo e incluso corrigieron errores de base. Inicialmente “queríamos que la elaboración de los productos de insectos se hiciera en los reductos urbanos marginales”, explica un miembro del conjunto, “pero después de nuestra investigación encontramos que la mayoría de la gente en los barrios pobres urbanos no quieren cultivar insectos porque tienen un espacio muy limitado y ensucian sus casas, así que nuestro modelo de negocio actual está destinado a agricultores semiurbanos y rurales que más tarde deberán distribuir sus productos en las ciudades”.







El alimento principal de Aspire es una harina fortificada, una mezcla de polvo de saltamontes (chapulines) con yuca, maíz o harina de trigo que tiene un sabor muy similar a la harina pura. Otros de sus productos son aperitivos o suplementos alimenticios. Y además sus avances también son útiles como pienso animal.

“Los insectos son atrapados, lavados y escurridos”, explican el proceso. Después “se hornean y muelen”, así que son consumibles y totalmente higiénicos. Para dar el primer paso en este modelo de negocio y probar su eficacia, Aspire comenzará trabajando en Oaxaca (México) con las 10.000 toneladas de langostas que han podido adquirir gracias al premio. Una vez convertidas en harina, el producto se podrá emplear para hacer “pan, pasteles, sopas, guisos, salsas…”. También están analizando la posibilidad de desarrollar este proyecto piloto en Ghana a la vez que se realiza en México, donde el trabajo ya ha comenzado.

- ¿Cuánto dinero se ahorra al hacer una tonelada de harina de insectos en comparación con una tonelada de harina normal?

- No podemos responder con precisión ya que no hemos hecho harina a escala industrial todavía. Probablemente sea algo más cara.

-¿Y cuáles son las ventajas y desventajas de la primera en comparación con la segunda?

- No hay desventajas nutricionales para la harina fortificada (de insectos). Ventajas sí: un mayor contenido de minerales, particularmente el zinc , hierro, calcio, magnesio y mayor contenido de proteína.

-¿Creen que la gente de los países occidentales está dispuesta a comer insectos?

No tenemos ninguna ambición de vender cualquier cosa que no quieran en los países más desarrollados. Sin embargo, vale la pena señalar que cuando las personas de estos sitios comen grillos enteros asados, les suelen gustar mucho. ¿Por qué no iban a consumir la harina?

- En cuanto a la cantidad de materia prima, ¿cuántos kilos de harina se pueden obtener de las 10 toneladas de insectos?

-Hablamos de una proporción de 30 a 70 , lo que significa que 10 toneladas de insectos darían aproximadamente 33 toneladas de harina fortificada.

- Y en cuanto a sus beneficios como generador de empleo, ¿qué aporta vuestro proyecto?

- Esto depende en gran medida del insecto, pero en México prevemos que cada agricultor puede producir aproximadamente 2 kg de insectos en una sola bandeja cada mes. Un agricultor típico podría tener veinte contenedores, 40 kg por mes. Esto significa que 25 agricultores pueden producir hasta una tonelada de insectos.

- Oí que tuvieron algún problema de patentes con otro estudiante llamado Jakub Dzamba…

-Como este tema se está resolviendo aún, preferimos no comentar demasiado hasta que se acabe el proceso. Solo diremos que, igual que con Dzamba, consultamos con muchas personas para asesorarnos mientras trabajamos en el proyecto. Estamos agradecidos por sus asesoramientos y apoyos, y estaremos felices de poner el crédito de colaboraciones como la de Dzamba [este estudiante participó con unas ilustraciones que ya han sido retiradas del trabajo final], pero según lo confirmado por la organización del Premio Hult, las ilustraciones y el trabajo de diseño gráfico prestados por Jakub no eran pertinentes para los criterios de evaluación utilizados en la competencia, y por lo tanto, no era importantes en nuestra victoria. Le deseamos suerte, aunque a diferencia de él, para nosotros esto no es una cosa de firmar patentes, sino de resolver un problema mayor a nivel mundial.

- Parece que la industria alimentaria de los insectos a gran escala ya ha escuchado el pistoletazo de salida con el proyecto mexicano. ¿Próximas metas?

-Vemos una gran oportunidad de mercado en África Occidental en general, y además es el continente con mayor déficit alimentario de todos.

- Al final vuestra idea “loca” de aquella tormenta de ideas resultó no ser tan loca.

- Supongo que, para mí, los insectos comestibles hoy son como los vehículos eléctricos eran hace 10 años: cuando yo estaba empezando un negocio de bicicletas eléctricas con un amigo mío –responde Thompson -parecía muy experimental y vanguardista en su momento, pero ahora, diez años después, veo las bicicletas eléctricas en todas partes. Este proyecto de alimentación con insectos es nuestra oportunidad para potenciar la próxima generación y resolver algunos de los problemas más acuciantes del mundo. Esperamos que un día podamos mirar atrás y decir: estábamos en la vanguardia de los insectos comestibles en 2013.

Relacionado: ¿Acabaremos comiendo insectos para sobrevivir?







ORIGINAL: Yoroboku
by Jaled Abdelrahim(@jaledaa)
November 26, 2013

domingo, 17 de noviembre de 2013

How a Radical New Teaching Method Could Unleash a Generation of Geniuses

These students in Matamoros, Mexico, didn’t have reliable Internet access, steady electricity, or much hope—until a radical new teaching method unlocked their potential. Peter Yang
These students in Matamoros, Mexico, didn’t have reliable Internet access, steady electricity, or much hope—until a radical new teaching method unlocked their potential.  

José Urbina López Primary School sits next to a dump just across the US border in Mexico. The school serves residents of Matamoros, a dusty, sunbaked city of 489,000 that is a flash point in the war on drugs. There are regular shoot-outs, and it’s not uncommon for locals to find bodies scattered in the street in the morning. To get to the school, students walk along a white dirt road that parallels a fetid canal. On a recent morning there was a 1940s-era tractor, a decaying boat in a ditch, and a herd of goats nibbling gray strands of grass. A cinder-block barrier separates the school from a wasteland—the far end of which is a mound of trash that grew so big, it was finally closed down. On most days, a rotten smell drifts through the cement-walled classrooms. Some people here call the school un lugar de castigo—”a place of punishment.”

For 12-year-old yy, it was a bright spot. More than 25 years ago, her family moved to the border from central Mexico in search of a better life. Instead, they got stuck living beside the dump. Her father spent all day scavenging for scrap, digging for pieces of aluminum, glass, and plastic in the muck. Recently, he had developed nosebleeds, but he didn’t want Paloma to worry. She was his little angel—the youngest of eight children.

After school, Paloma would come home and sit with her father in the main room of their cement-and-wood home. Her father was a weather-beaten, gaunt man who always wore a cowboy hat. Paloma would recite the day’s lessons for him in her crisp uniform—gray polo, blue-and-white skirt—and try to cheer him up. She had long black hair, a high forehead, and a thoughtful, measured way of talking. School had never been challenging for her. She sat in rows with the other students while teachers told the kids what they needed to know. It wasn’t hard to repeat it back, and she got good grades without thinking too much. As she headed into fifth grade, she assumed she was in for more of the same—lectures, memorization, and busy work.

Sergio Juárez Correa was used to teaching that kind of class. For five years, he had stood in front of students and worked his way through the government-mandated curriculum. It was mind-numbingly boring for him and the students, and he’d come to the conclusion that it was a waste of time. Test scores were poor, and even the students who did well weren’t truly engaged. Something had to change.

He too had grown up beside a garbage dump in Matamoros, and he had become a teacher to help kids learn enough to make something more of their lives. So in 2011—when Paloma entered his class—Juárez Correa decided to start experimenting. He began reading books and searching for ideas online. Soon he stumbled on a video describing the work of Sugata Mitra, a professor of educational technology at Newcastle University in the UK. In the late 1990s and throughout the 2000s, Mitra conducted experiments in which he gave children in India access to computers. Without any instruction, they were able to teach themselves a surprising variety of things, from DNA replication to English.

Elementary school teacher Sergio Juárez Correa, 31, upended his teaching methods, revealing extraordinary abilities in his 12-year-old student Paloma Noyola Bueno.
Juárez Correa didn’t know it yet, but he had happened on an emerging educational philosophy, one that applies the logic of the digital age to the classroom. That logic is inexorable: Access to a world of infinite information has changed how we communicate, process information, and think. Decentralized systems have proven to be more productive and agile than rigid, top-down ones. Innovation, creativity, and independent thinking are increasingly crucial to the global economy.

And yet the dominant model of public education is still fundamentally rooted in the industrial revolution that spawned it, when workplaces valued punctuality, regularity, attention, and silence above all else. (In 1899, William T. Harris, the US commissioner of education, celebrated the fact that US schools had developed the “appearance of a machine,” one that teaches the student “to behave in an orderly manner, to stay in his own place, and not get in the way of others.”) We don’t openly profess those values nowadays, but our educational system—which routinely tests kids on their ability to recall information and demonstrate mastery of a narrow set of skills—doubles down on the view that students are material to be processed, programmed, and quality-tested. School administrators prepare curriculum standards and “pacing guides” that tell teachers what to teach each day. Legions of managers supervise everything that happens in the classroom; in 2010 only 50 percent of public school staff members in the US were teachers.

The results speak for themselves: Hundreds of thousands of kids drop out of public high school every year. Of those who do graduate from high school, almost a third are “not prepared academically for first-year college courses,” according to a 2013 report from the testing service ACT. The World Economic Forum ranks the US just 49th out of 148 developed and developing nations in quality of math and science instruction. “The fundamental basis of the system is fatally flawed,” says Linda Darling-Hammond, a professor of education at Stanford and founding director of the National Commission on Teaching and America’s Future. “In 1970 the top three skills required by the Fortune 500 were the three Rs: reading, writing, and arithmetic. In 1999 the top three skills in demand were teamwork, problem-solving, and interpersonal skills. We need schools that are developing these skills.”

That’s why a new breed of educators, inspired by everything from the Internet to evolutionary psychology, neuroscience, and AI, are inventing radical new ways for children to learn, grow, and thrive. To them, knowledge isn’t a commodity that’s delivered from teacher to student but something that emerges from the students’ own curiosity-fueled exploration. Teachers provide prompts, not answers, and then they step aside so students can teach themselves and one another. They are creating ways for children to discover their passion—and uncovering a generation of geniuses in the process.

At home in Matamoros, Juárez Correa found himself utterly absorbed by these ideas. And the more he learned, the more excited he became. On August 21, 2011—the start of the school year — he walked into his classroom and pulled the battered wooden desks into small groups. When Paloma and the other students filed in, they looked confused. Juárez Correa invited them to take a seat and then sat down with them.

He started by telling them that there were kids in other parts of the world who could memorize pi to hundreds of decimal points. They could write symphonies and build robots and airplanes. Most people wouldn’t think that the students at José Urbina López could do those kinds of things. Kids just across the border in Brownsville, Texas, had laptops, high-speed Internet, and tutoring, while in Matamoros the students had intermittent electricity, few computers, limited Internet, and sometimes not enough to eat.

“But you do have one thing that makes you the equal of any kid in the world,” Juárez Correa said. “Potential.”

He looked around the room. “And from now on,” he told them, “we’re going to use that potential to make you the best students in the world.”

Paloma was silent, waiting to be told what to do. She didn’t realize that over the next nine months, her experience of school would be rewritten, tapping into an array of educational innovations from around the world and vaulting her and some of her classmates to the top of the math and language rankings in Mexico.

“So,” Juárez Correa said, “what do you want to learn?”

In 1999, Sugata Mitra was chief scientist at a company in New Delhi that trains software developers. His office was on the edge of a slum, and on a hunch one day, he decided to put a computer into a nook in a wall separating his building from the slum. He was curious to see what the kids would do, particularly if he said nothing. He simply powered the computer on and watched from a distance. To his surprise, the children quickly figured out how to use the machine.

Over the years, Mitra got more ambitious. For a study published in 2010, he loaded a computer with molecular biology materials and set it up in Kalikuppam, a village in southern India. He selected a small group of 10- to 14-year-olds and told them there was some interesting stuff on the computer, and might they take a look? Then he applied his new pedagogical method: He said no more and left.

Over the next 75 days, the children worked out how to use the computer and began to learn. When Mitra returned, he administered a written test on molecular biology. The kids answered about one of four questions correctly. After another 75 days, with the encouragement of a friendly local, they were getting every other question right. “If you put a computer in front of children and remove all other adult restrictions, they will self-organize around it,” Mitra says, “like bees around a flower.”

A charismatic and convincing proselytizer, Mitra has become a darling in the tech world. In early 2013 he won a $1 million grant from TED, the global ideas conference, to pursue his work. He’s now in the process of establishing seven “schools in the cloud,” five in India and two in the UK. In India, most of his schools are single-room buildings. There will be no teachers, curriculum, or separation into age groups—just six or so computers and a woman to look after the kids’ safety. His defining principle: “The children are completely in charge.”

“THE BOTTOM LINE IS, IF YOU’RE NOT THE ONE CONTROLLING YOUR LEARNING, YOU’RE NOT GOING TO LEARN AS WELL.”

Mitra argues that the information revolution has enabled a style of learning that wasn’t possible before. The exterior of his schools will be mostly glass, so outsiders can peer in. Inside, students will gather in groups around computers and research topics that interest them. He has also recruited a group of retired British teachers who will appear occasionally on large wall screens via Skype, encouraging students to investigate their ideas—a process Mitra believes best fosters learning. He calls them the Granny Cloud. “They’ll be life-size, on two walls” Mitra says. “And the children can always turn them off.”

Mitra’s work has roots in educational practices dating back to Socrates. Theorists from Johann Heinrich Pestalozzi to Jean Piaget and Maria Montessori have argued that students should learn by playing and following their curiosity. Einstein spent a year at a Pestalozzi-inspired school in the mid-1890s, and he later credited it with giving him the freedom to begin his first thought experiments on the theory of relativity. Google founders Larry Page and Sergey Brin similarly claim that their Montessori schooling imbued them with a spirit of independence and creativity.

In recent years, researchers have begun backing up those theories with evidence. In a 2011 study, scientists at the University of Illinois at Urbana-Champaign and the University of Iowa scanned the brain activity of 16 people sitting in front of a computer screen. The screen was blurred out except for a small, movable square through which subjects could glimpse objects laid out on a grid. Half the time, the subjects controlled the square window, allowing them to determine the pace at which they examined the objects; the rest of the time, they watched a replay of someone else moving the window. The study found that when the subjects controlled their own observations, they exhibited more coordination between the hippocampus and other parts of the brain involved in learning and posted a 23 percent improvement in their ability to remember objects. “The bottom line is, if you’re not the one who’s controlling your learning, you’re not going to learn as well,” says lead researcher Joel Voss, now a neuroscientist at Northwestern University.

In 2009, scientists from the University of Louisville and MIT’s Department of Brain and Cognitive Sciences conducted a study of 48 children between the ages of 3 and 6. The kids were presented with a toy that could squeak, play notes, and reflect images, among other things. For one set of children, a researcher demonstrated a single attribute and then let them play with the toy. Another set of students was given no information about the toy. This group played longer and discovered an average of six attributes of the toy; the group that was told what to do discovered only about four. A similar study at UC Berkeley demonstrated that kids given no instruction were much more likely to come up with novel solutions to a problem. “The science is brand-new, but it’s not as if people didn’t have this intuition before,” says coauthor Alison Gopnik, a professor of psychology at UC Berkeley.

Gopnik’s research is informed in part by advances in artificial intelligence. If you program a robot’s every movement, she says, it can’t adapt to anything unexpected. But when scientists build machines that are programmed to try a variety of motions and learn from mistakes, the robots become far more adaptable and skilled. The same principle applies to children, she says.


A BRIEF HISTORY OF ALTERNATIVE SCHOOLS

Alternative Schools, a History · New research shows what educators have long intuited: Letting kids pursue their own interests sharpens their hunger for knowledge. Here’s a look back at this approach. —Jason Kehe
Socrates
470BC | Socrates is born in Athens. He goes on to become a long-haired teacher who famously let students arrive at their own conclusions. His questioning, probing approach — the Socratic method—endures to this day.
Maria Montessori
1907 | Maria Montessori opens her first Children’s House in Rome, where kids are encouraged to play and teach themselves. Americans later visit her schools and see the Montessori method in action. It spreads worldwide.
Rudolf Steiner
Waldorf school
1919 | The first Waldorf school opens in Stuttgart, Germany. Based on the ideas of philosopher Rudolf Steiner, it encourages self-motivated learning. Today, there are more than 1,000 Waldorf schools in 60 countries.
A. S. Neill
1921 | A. S. Neill Founds the Summerhill School, where kids have the “freedom to go to lessons or stay away, freedom to play for days … or years if necessary.” Eventually, such democratic schoolsappear around the world.
Loris Malaguzzi
1945 | Loris Malaguzzi volunteers to teach in a school that parents are building in a war-torn Italian village outside Reggio Emilia. The Reggio Emilia approach—a community of self-guided learning—is born.
Seymour Papert
1967 |Seymour Papert, a protégé of child psychologist Jean Piaget, helps create the first version of Logo, a programming language kids can use to teach themselves. He becomes a lifelong advocate for technology’s role in learning.
Sugata Mitra
1999 | Sugata Mitra conducts his first “hole in the wall” experiment in New Delhi, India. On their own, slum kids teach themselves to use a computer. Mitra dubs his approach minimally invasive education.
Ken Robinson
2006 | Ken Robinson gives what will become the most frequently viewed TED Talk ever: “How Schools Kill Creativity.”Students should be free to make mistakes and pursue their own creative interests, Robinson argues.
Common Core
2012 | Forty-five US states adopt the Common Core, new curriculum standards that include student-centered learning. Math students, say, should “start by explaining to themselves the meaning of a problem.”
Brooklyn Free School Students here direct their own learning. There are no grades or formal assignments.  Brian Finke
Evolutionary psychologists have also begun exploring this way of thinking. Peter Gray, a research professor at Boston College who studies children’s natural ways of learning, argues that human cognitive machinery is fundamentally incompatible with conventional schooling. Gray points out that young children, motivated by curiosity and playfulness, teach themselves a tremendous amount about the world. And yet when they reach school age, we supplant that innate drive to learn with an imposed curriculum. “We’re teaching the child that his questions don’t matter, that what matters are the questions of the curriculum. That’s just not the way natural selection designed us to learn. It designed us to solve problems and figure things out that are part of our real lives.”

Some school systems have begun to adapt to this new philosophy—with outsize results. In the 1990s, Finland pared the country’s elementary math curriculum from about 25 pages to four, reduced the school day by an hour, and focused on independence and active learning. By 2003, Finnish students had climbed from the lower rungs of international performance rankings to first place among developed nations.

Nicholas Negroponte, cofounder of the MIT Media Lab, is taking this approach even further with his One Laptop per Child initiative. Last year the organization delivered 40 tablets to children in two remote villages in Ethiopia. Negroponte’s team didn’t explain how the devices work or even open the boxes. Nonetheless, the children soon learned to play back the alphabet song and taught themselves to write letters. They also figured out how to use the tablet’s camera. This was impressive because the organization had disabled camera usage. “They hacked Android,” Negroponte says.

One day Juárez Correa went to his whiteboard and wrote “1 = 1.00.” Normally, at this point, he would start explaining the concept of fractions and decimals. Instead he just wrote “½ = ?” and “¼ = ?”

“Think about that for a second,” he said, and walked out of the room.

While the kids murmured, Juárez Correa went to the school cafeteria, where children could buy breakfast and lunch for small change. He borrowed about 10 pesos in coins, worth about 75 cents, and walked back to his classroom, where he distributed a peso’s worth of coins to each table. He noticed that Paloma had already written .50 and .25 on a piece of paper.

“One peso is one peso,” he said. “What’s one-half?”

At first a number of kids divided the coins into clearly unequal piles. It sparked a debate among the students about what one-half meant. Juárez Correa’s training told him to intervene. But now he remembered Mitra’s research and resisted the urge. Instead, he watched as Alma Delia Juárez Flores explained to her tablemates that half means equal portions. She counted out 50 centavos. “So the answer is .50,” she said. The other kids nodded. It made sense.

For Juárez Correa it was simultaneously thrilling and a bit scary. In Finland, teachers underwent years of training to learn how to orchestrate this new style of learning; he was winging it. He began experimenting with different ways of posing open-ended questions on subjects ranging from the volume of cubes to multiplying fractions. “The volume of a square-based prism is the area of the base times the height. The volume of a square-based pyramid is that formula divided by three,” he said one morning. “Why do you think that is?”

He walked around the room, saying little. It was fascinating to watch the kids approach the answer. They were working in teams and had models of various shapes to look at and play with. The team led by Usiel Lemus Aquino, a short boy with an ever-present hopeful expression, hit on the idea of drawing the different shapes—prisms and pyramids. By layering the drawings on top of each other, they began to divine the answer. Juárez Correa let the kids talk freely. It was a noisy, slightly chaotic environment—exactly the opposite of the sort of factory-friendly discipline that teachers were expected to impose. But within 20 minutes, they had come up with the answer.

“Three pyramids fit in one prism,” Usiel observed, speaking for the group. “So the volume of a pyramid must be the volume of a prism divided by three.”

Juárez Correa was impressed. But he was even more intrigued by Paloma. During these experiments, he noticed that she almost always came up with the answer immediately. Sometimes she explained things to her tablemates, other times she kept the answer to herself. Nobody had told him that she had an unusual gift. Yet even when he gave the class difficult questions, she quickly jotted down the answers. To test her limits, he challenged the class with a problem he was sure would stump her. He told the story of Carl Friedrich Gauss, the famous German mathematician, who was born in 1777.

When Gauss was a schoolboy, one of his teachers asked the class to add up every number between 1 and 100. It was supposed to take an hour, but Gauss had the answer almost instantly.

“Does anyone know how he did this?” Juárez Correa asked.

A few students started trying to add up the numbers and soon realized it would take a long time. Paloma, working with her group, carefully wrote out a few sequences and looked at them for a moment. Then she raised her hand.

“The answer is 5,050,” she said. “There are 50 pairs of 101.”

Juárez Correa felt a chill. He’d never encountered a student with so much innate ability. He squatted next to her and asked why she hadn’t expressed much interest in math in the past, since she was clearly good at it.

“Because no one made it this interesting,” she said.

OUR EDUCATIONAL SYSTEM IS ROOTED IN THE INDUSTRIAL AGE. IT VALUES PUNCTUALITY, ATTENDANCE, AND SILENCE ABOVE ALL ELSE.

Paloma’s father got sicker. He continued working, but he was running a fever and suffering headaches. Finally he was admitted to the hospital, where his condition deteriorated; on February 27, 2012, he died of lung cancer. On Paloma’s last visit before he passed away, she sat beside him and held his hand. “You are a smart girl,” he said. “Study and make me proud.”

Paloma missed four days of school for the funeral before returning to class. Her friends could tell she was distraught, but she buried her grief. She wanted to live up to her father’s last wish. And Juárez Correa’s new style of curating challenges for the kids was the perfect refuge for her. As he continued to relinquish control, Paloma took on more responsibility for her own education. He taught the kids about democracy by letting them elect leaders who would decide how to run the class and address discipline. The children elected five representatives, including Paloma and Usiel. When two boys got into a shoving match, the representatives admonished the boys, and the problem didn’t happen again.

Juárez Correa spent his nights watching education videos. He read polemics by the Mexican cartoonist Eduardo del Río (known as Rius), who argued that kids should be free to explore whatever they want. He was also still impressed by Mitra, who talks about letting children “wander aimlessly around ideas.” Juárez Correa began hosting regular debates in class, and he didn’t shy away from controversial topics. He asked the kids if they thought homosexuality and abortion should be permitted. He asked them to figure out what the Mexican government should do, if anything, about immigration to the US. Once he asked a question, he would stand back and let them engage one another.

A key component in Mitra’s theory was that children could learn by having access to the web, but that wasn’t easy for Juárez Correa’s students. The state paid for a technology instructor who visited each class once a week, but he didn’t have much technology to demonstrate. Instead, he had a batch of posters depicting keyboards, joysticks, and 3.5-inch floppy disks. He would hold the posters up and say things like, “This is a keyboard. You use it to type.”

As a result, Juárez Correa became a slow-motion conduit to the Internet. When the kids wanted to know why we see only one side of the moon, for example, he went home, Googled it, and brought back an explanation the next day. When they asked specific questions about eclipses and the equinox, he told them he’d figure it out and report back.
Sugata Mitra’s research on student-led learning inspired Juárez Correa
Juárez Correa also brought something else back from the Internet. It was the fable of a forlorn burro trapped at the bottom of a well. Since thieves had broken into the school and sliced the electrical cord off of the classroom projector (presumably to sell the copper inside), he couldn’t actually show them the clip that recounted the tale. Instead, he simply described it.

One day, a burro fell into a well, Juárez Correa began. It wasn’t hurt, but it couldn’t get out. The burro’s owner decided that the aged beast wasn’t worth saving, and since the well was dry, he would just bury both. He began to shovel clods of earth into the well. The burro cried out, but the man kept shoveling. Eventually, the burro fell silent. The man assumed the animal was dead, so he was amazed when, after a lot of shoveling, the burro leaped out of the well. It had shaken off each clump of dirt and stepped up the steadily rising mound until it was able to jump out.

Juárez Correa looked at his class. “We are like that burro,” he said. “Everything that is thrown at us is an opportunity to rise out of the well we are in.”

When the two-day national standardized exam took place in June 2012, Juárez Correa viewed it as just another pile of dirt thrown on the kids’ heads. It was a step back to the way school used to be for them: mechanical and boring. To prevent cheating, a coordinator from the Ministry of Education oversaw the proceedings and took custody of the answer sheets at the end of testing. It felt like a military exercise, but as the kids blasted through the questions, they couldn’t help noticing that it felt easy, as if they were being asked to do something very basic.

Ricardo Zavala Hernandez, assistant principal at José Urbina López, drinks a cup of coffee most mornings as he browses the web in the admin building, a cement structure that houses the school’s two functioning computers. One day in September 2012, he clicked on the site for ENLACE, Mexico’s national achievement exam, and discovered that the results of the June test had been posted.

Zavala Hernandez put down his coffee. Most of the classes had done marginally better this year—but Paloma’s grade was another story. The previous year, 45 percent had essentially failed the math section, and 31 percent had failed Spanish. This time only 7 percent failed math and 3.5 percent failed Spanish. And while none had posted an Excellent score before, 63 percent were now in that category in math.

The language scores were very high. Even the lowest was well above the national average. Then he noticed the math scores. The top score in Juárez Correa’s class was 921. Zavala Hernandez looked over at the top score in the state: It was 921. When he saw the next box over, the hairs on his arms stood up. The top score in the entire country was also 921.

He printed the page and speed-walked to Juárez Correa’s classroom. The students stood up when he entered.

“Take a look at this,” Zavala Hernandez said, handing him the printout.

Juárez Correa scanned the results and looked up. “Is this for real?” he asked.

“I just printed it off the ENLACE site,” the assistant principal responded. “It’s real.”

Juárez Correa noticed the kids staring at him, but he wanted to make sure he understood the report. He took a moment to read it again, nodded, and turned to the kids.

“We have the results back from the ENLACE exam,” he said. “It’s just a test, and not a great one.”

A number of students had a sinking feeling. They must have blown it.

“But we have a student in this classroom who placed first in Mexico,” he said, breaking into a smile.

Paloma received the highest math score in the country, but the other students weren’t far behind. Ten got math scores that placed them in the 99.99th percentile. Three of them placed at the same high level in Spanish. The results attracted a quick burst of official and media attention in Mexico, most of which focused on Paloma. She was flown to Mexico City to appear on a popular TV show and received a variety of gifts, from a laptop to a bicycle.

Juárez Correa himself got almost no recognition, despite the fact that nearly half of his class had performed at a world- class level and that even the lowest performers had markedly improved.

His other students were congratulated by friends and family. The parents of Carlos Rodríguez Lamas, who placed in the 99.99th percentile in math, treated him to three steak tacos. It was his first time in a restaurant. Keila Francisco Rodríguez got 10 pesos from her parents. She bought a bag of Cheetos. The kids were excited. They talked about being doctors, teachers, and politicians.

Juárez Correa had mixed feelings about the test. His students had succeeded because he had employed a new teaching method, one better suited to the way children learn. It was a model that emphasized group work, competition, creativity, and a student-led environment. So it was ironic that the kids had distinguished themselves because of a conventional multiple-choice test. “These exams are like limits for the teachers,” he says. “They test what you know, not what you can do, and I am more interested in what my students can do.”

Like Juárez Correa, many education innovators are succeeding outside the mainstream. For example, the 11 Internationals Network high schools in New York City report a higher graduation rate than the city’s average for the same populations. They do it by emphasizing student-led learning and collaboration. At the coalition of Big Picture Learning schools—56 schools across the US and another 64 around the world—teachers serve as advisers, suggesting topics of interest; students also work with mentors from business and the community, who help guide them into internships. As the US on-time high school graduation rate stalls at about 75 percent, Big Picture is graduating more than 90 percent of its students.

But these examples—involving only thousands of students—are the exceptions to the rule. The system as a whole educates millions and is slow to recognize or adopt successful innovation. It’s a system that was constructed almost two centuries ago to meet the needs of the industrial age. Now that our society and economy have evolved beyond that era, our schools must also be reinvented.

For the time being, we can see what the future looks like in places like Juárez Correa’s classroom. We can also see that change will not come easily. Though Juárez Correa’s class posted impressive results, they inspired little change. Francisco Sánchez Salazar, chief of the Regional Center of Educational Development in Matamoros, was even dismissive. “The teaching method makes little difference,” he says. Nor does he believe that the students’ success warrants any additional help. “Intelligence comes from necessity,” he says. “They succeed without having resources.”

More than ever, Juárez Correa felt like the burro in the story. But then he remembered Paloma. She had lost her father and was growing up on the edge of a garbage dump. Under normal circumstances, her prospects would be limited. But like the burro, she was shaking off the clods of dirt; she had begun climbing the rising mound out of the well.

Want to help teachers like Sergio Juárez Correa make a difference?
Here’s how you can get involved in the student-centered movement.


ORIGINAL: Wired
10.15.13

domingo, 14 de julio de 2013

Amazing Underwater River in Mexico

July 14, 2013
photo: Anatoly Beloshchin

This unbelievable site is located in a water-filled cave – or cenote (pronounced say-no-tay) – in Mexico’s Yucatan Peninsula. What appears to be an underwater river flows placidly through the cave, offering up one of the most stunning sights ever captured in underwater photography.

The “river” is actually a thin layer of hydrogen sulfate separating the fresh water at the top from the salt water below. Divers can swim right through the “river” to view it from below. Underwater trees line the river, contributing to its bizarre and otherworldly appearance. 


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lunes, 12 de noviembre de 2012

Sheril Kirshenbaum: La ciencia de besar. (La Ciudad de Las Ideas)

Sheril Kirshenbaum, autora de “La ciencia de besar”, estudió cualidades químicas, sociales e históricas del beso, el cual es más que una simple demostración de cariño.

“The Kiss by the Hôtel de Ville,” taken in Paris in 1950. (Photo: Robert Doisneau)
Kirshenbaum, científica de la Universidad de Texas, en una entrevista con BBC Mundo, definió al beso como "presionar los labios contra otra persona, otras partes del cuerpo o hasta objetos" y explicita que existen razones variadas por las que la gente besa, pero “nuestros labios están repletos de terminaciones nerviosas, así que el contacto más suave enviará una gran gama de señales al cerebro que usualmente hacen que se sienta bien”.

El beso tiene el poder de generar fenómenos químicos en los cuerpos, que son responsables del enamoramiento. Mientras que la hormona oxitocina “nos da una fuerte sensación de apego a otra persona, es responsable de atar y mantener nuestras relaciones por un periodo largo de tiempo”, la dopamina se eleva cuando besamos, y es “responsable de esos sentimientos de deseo ardiente y el no poder esperar para estar con esa persona”, expresó Kirshenbaum.

La científica también identificó la actuación de un neurotransmisor, la serotonina, “que es responsable de los pensamientos incesantes hacia alguien, especialmente cuando besamos a alguien nuevo”.

Según la autora, un beso es capaz de brindarnos pistas sobre cuán compatibles somos con la persona con la cual nos besamos; “comenzamos a usar nuestro sentido del olfato, gusto y tacto, y todo ello nos provee de una serie de pistas sobre” la compatibilidad.

Kirshenbaum identificó que las mujeres se sienten más atraídas a hombres con diferentes genes a los suyos, por lo cual les atrae inicialmente el aroma de esos hombres, desconociendo de manera consciente por qué se sienten de esa manera. Según manifestó ante la BBC, experimentos científicos han revelado que las mujeres parecen descifrar inmediatamente si alguien es un buen complemento genético dado que sería bueno para sus hijos. 

No sólo se limitó a analizar el beso romántico, sino también el beso social, aquel que se da en la mejilla como saludo y que tiene un “significado evolutivo, porque refuerza lazos, acicala o refleja una jerarquía social”. No obstante, en algunos países de América Latina o de Europa, Francia, Italia, es más probable ver a gente besándose en espacios abiertos que en China, Japón o Medio Oriente, donde no se ven manifestaciones de afecto públicas.

Kirshenbaum también estudió la cualidad histórica del beso, preguntándose qué conductas desplegaban los individuos antes de descubrir el beso. “Se lamerían, soplarían, chuparían, pellizcarían, hasta existió en una cultura donde de hecho se mordían las pestañas cuando tenían encuentros íntimos”, expresa la científica.

Asimismo, reivindicó las capacidades positivas del beso, el cual puede minimizar el stress, disminuir la presión arterial o fortalecer los lazos sociales.

(Foto: flickr.com/richardmasoner)



miércoles, 17 de octubre de 2012

La primera red de ciencia latinoamericana será de acceso abierto

ORIGINAL: ACAC
Artículo de Javier Salas (@javisalas)

Los nueve primeros países en investigación de Latinoamérica lanzan este mes una plataforma que difundirá gratuitamente toda su producción científica

La ciencia latinoamericana se sube al tren del acceso abierto. Este mismo mes lanzará su primera red de estudios en línea y los nueve países que la formarán quieren que sea accesible a todo el mundo. La intención de esta plataforma es compartir y dar visibilidad a la producción científica generada en las instituciones latinoamericanas, y la mejor forma es que la información fluya rápida y eficazmente; que se pueda consultar y compartir libremente.

La investigación pública será accesible y gratuita en la red. / MINCYT.
Argentina, Brasil, Chile, Colombia, Ecuador, El Salvador, México, Perú y Venezuela firmarán el firmarán el próximo 29 de noviembre en Buenos Aires el lanzamiento de LAReferencia, como se llamará este punto de encuentro de la ciencia producida en Latinoamérica, destinada en principio a sus más de 700.000 docentes e investigadores y a sus más de 15 millones de estudiantes. Los países de la región reconocen un problema de visibilidad y estandarización de su producción, y LAReferencia aspira a cambiar esa tendencia.

“LAReferencia está íntimamente ligada al movimiento por el acceso abierto a la información científico-tecnológica, por lo tanto, las investigaciones cosechadas por la red serán de acceso abierto a todos los ciudadanos”, explica Sergio Matheos, responsable de coordinación Institucional del Ministerio de Ciencia de Argentina.

El representante argentino en las negociaciones explica que los usuarios podrán, de forma gratuita, leer, descargar, copiar, distribuir, imprimir, buscar o enlazar los textos completos de los artículos científicos “sin otras barreras económicas, legales o técnicas que las que suponga internet en sí misma”, siempre que los autores mantengan el control sobre la integridad de su trabajo y el derecho a ser adecuadamente reconocidos y citados. Recientemente, la Unión Europea decidió que toda producción científica pagada con fondos públicos deberá ser de acceso abierto.

En agosto se puso la última piedra del proyecto, la relacionada con la difícil comunicación tecnológica de las 18 instituciones que tendrán que gestionar todo ese cauce de información. La intención es que no sea un repositorio unificado con un solo servidor que contenga toda la información, sino que se busca trabajar en red, por lo que cada universidad u organismo tendrá que desarrollar sus propias bases de datos. Así, todas las instituciones deberán asegurar que se siguen estándares internacionales, acordados y convenidos con sus pares para la consecución de los objetivos de difusión y trabajo colaborativo.

Frente a las revistas de pago
El proyecto pretende evitar uno de los principales galimatías financieros y formales a los que se enfrentan las instituciones investigadores: pagar varias veces por el mismo trabajo. 
  • Primero, financiar la investigación; 
  • después, abonar la publicación en una revista científica; y 
  • por último, sufragar la suscripción a esa revista para que sus investigadores puedan acceder a sus contenidos.
Los científicos mantendrán la autoría intelectual, y las instituciones, los derechos económicos. Y el organismo científico que no cumpla liberando su producción dejará de recibir financiación pública. Una experiencia que Argentina ya había puesto en marcha y que ahora se extiende a buena parte del continente.

LAReferencia está financiada por el Banco Interamericano de Desarrollo aunque, según explica Matheos, “se está trabajando en un plan de sostenibilidad para dar continuidad a la red, para lo que se ha diseñado una estructura eficiente que permita reducir costos de gestión y prever el financiamiento por parte de los países socios”.

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domingo, 14 de octubre de 2012

México: Greenpeace crea una agencia de “viajes tóxicos” para los amantes de la contaminación

ORIGINAL: Más Verde


Pescar peces muertos, hacer snorkel en aguas infestadas de petróleo, surfear en olas tóxicas o tomar el sol en playas apestosas son algunos de los atractivos que ofrece la agencia de viajes ficticia “Toxic Tours” creada por Greenpeace para concienciar sobre la contaminación de aguas mexicanas.

“La idea es que gracias a estos paquetes turísticos se genere conciencia y la gente vea los ríos contaminados que tenemos en México que tienen consecuencias muy graves para la sociedad, sobre todo para las personas que viven cerca de esos lugares”, dijo a la agencia EFE en una entrevista Pierre Terras, coordinador de la campaña de Tóxicos de Greenpeace México.

Acido sulfhídrico, mercurio, arsénico, cromo, nonil-fenol, plomo, cadmio, furano, son algunos de los componentes químicos que aparecen en el 70 % de los ríos de México y que hace que muchos de los habitantes cercanos sufran padecimientos que vienen derivados de los químicos.

La organización de defensa de la naturaleza se sirvió de actores y personalidades como Alfonso Herrera o Claudia Lizaldi, quienes llevan unas semanas anunciando esta supuesta agencia de viajes tóxicos que finalmente resultó ser una campaña de Greenpeace.

La campaña se basa en postales que estas personalidades escriben presuntamente después de visitar estas zonas y en las que explican lo que han sentido al hacer cosas como bucear en un río de petróleo.


La idea de hacer esta campaña llegó a Greenpeace después de ver lo que sucede en la zona de El Salto, en el estado de Jalisco, un lugar que hace 50 años era turístico por la belleza de su cascada en el río Santiago pero que la contaminación acabó con el turismo.

Twitter: #ToxicTours