Then time of recovering from injure is matters

May 27th, 2009 Comments off

Article on Physorg about what cutting age medical technology can give to athletes then they broke something and need to be repaired.

You stub your big toe and the pain has you hobbling for weeks. UNC point guard Ty Lawson jams his and two days later plays 36 minutes.

Tiger Woods injures the anterior cruciate ligament in his left knee and goes on to win five of his next six golf tournaments before deciding to have surgery. You injure your ACL and sit on the couch watching Woods.

Why is it that injuries that take the rest of us out of action for weeks, months or possibly forever, only bench elite athletes for a short time? Is their body makeup that superior? Do they have a heightened tolerance for pain? Do they have access to cures of modern medicine unavailable to the rest of us? Are they simply treated differently?

Categories: Blog Post Tags:

Daydreaming not a lost time

May 20th, 2009 Comments off

The study, published in the Proceedings of the National Academy of Sciences, finds that activity in numerous brain regions increases when our minds wander. It also finds that brain areas associated with complex problem-solving – previously thought to go dormant when we daydream – are in fact highly active during these episodes.

“Mind wandering is typically associated with negative things like laziness or inattentiveness,” says lead author, Prof. Kalina Christoff, UBC Dept. of Psychology. “But this study shows our brains are very active when we daydream – much more active than when we focus on routine tasks.”

Categories: Blog Post Tags:

Five heresies of Freeman Dyson

May 16th, 2009 Comments off

Lecture from one of famous mind of our time Freeman Dyson. It is about not what waiting us in the Future but what we can begin looking at today.
Main themes of this lecture is Climat management, rains in Sahara , Home Biotech, Nuclear Weapons.

Best quote about a place of computers in our life.

For better or for worse, in sickness or in health, till death do us part, humans and computers are now joined together more durably than husbands and wives.

Также доступна версия лекции на русском.

Categories: Blog Post Tags: ,

Моторозированная броня уже скоро

May 8th, 2009 Comments off

Экзоскелет позволяет человеку не прилагая больших усилий нести вес до 100 кг.
Если 70 из этих 100 кг потратить на броню из современных материалов, то получиться чтото вроде моторизированной брони из Fallout.
Видео презентация экзоскелета. Read more…

Categories: Post Russian Tags: ,

Positive stereotype win the battle

May 5th, 2009 Comments off

In a new study led by Robert J. Rydell, assistant professor in the Department of Psychological and Brain Sciences at Indiana University, focused on women and math ability.

Was shown that when aware of both a negative and positive stereotype related to performance, women will identify more closely with the positive stereotype, avoiding the harmful impact the negative stereotype unwittingly can have on their performance. Stereotype threat — where just the awareness of a stereotype can influence performance regardless of actual ability — has been demonstrated in many domains, from driving cars to cooking. In academics, high-stakes tests, such as college entrance exams, often ask test-takers to select demographic information, such as gender and level of education, before beginning the test.

Also interesting moment what words not the only way for people to become aware of stereotype situation.

Rydell said people become aware of stereotypes in different ways. For women, simply sitting between two men while taking a math test can activate the negative gender stereotype.

Categories: Blog Post Tags: ,

Potential fifth force of nature, outcome of LHC

May 1st, 2009 Comments off

The Large Hadron Collider is an huge particle accelerator whose 27 kilometres tunnel beneath the Franco-Swiss border. A group of physicists at the University of Nevada, Reno has analyzed data from the accelerator that could ultimately prove or disprove the possibility of a fifth force of nature. Their refined analysis sets new limits on a hypothesized particle, the extra Z-boson, carving out the lower-energy part of the discovery reach of the LHC.

Andrei Derevianko, from the College of Science’s Department of Physics, who has conducted groundbreaking research to improve the time-telling capabilities of the world’s most accurate atomic clocks, is one of the principals behind what is believed to be the most accurate to-date low-energy determination of the strength of the electroweak coupling between atomic electrons and quarks of the nucleus.

We carry out high-precision calculation of parity violation in cesium atom, reducing theoretical uncertainty by a factor of two compared to previous evaluations. We combine previous measurements with our calculations and extract the weak charge of the 133Cs nucleus, Q_W = -73.16(29)_exp(20)_th. The result is in agreement with the Standard Model (SM) of elementary particles. This is the most accurate to-date test of the low-energy electroweak sector of the SM. In combination with the results of high-energy collider experiments, we confirm the energy-dependence (or “running”) of the electroweak force over an energy range spanning four orders of magnitude (from ~10 MeV to ~100 GeV). Additionally, our result places constraints on a variety of new physics scenarios beyond the SM. In particular, we increase the lower limit on the masses of extra $Z$-bosons predicted by models of grand unification and string theories.

Categories: Blog Post Tags:

To use a statistics you need to be reminded of it

April 27th, 2009 Comments off

Overall, the researchers found that a predisposition to look at data statistically (either because of hint given by the experimenters, the nature of the data, or the nature of the individual’s experience) led to more statistical reasoning. In addition, people who had been trained in statistics — both formally and informally in very brief training sessions — were more likely to use statistical reasoning to solve problems.

Categories: Blog Post Tags:

If Atheists Ruled the World

April 24th, 2009 Comments off

Parody interview on Christians view about atheists. All text taken directly from online Christian fundamentalist forums.

Версия озвученная на русском.

Categories: Blog Post Tags: , ,

Генератор подарков

April 24th, 2009 1 comment

Фриц Морген поделился идеей бизнеса который может помочь людям имеющим проблему с выбором подарка. Суть идеи кратко звучит так: нанимаем телефонных консультантов которые опрашивают клиента и выдают совет какой подарок лучше подарить.

Я как приверженец применения информационных технологий вижу еще один вариант решения этой же проблемы. Экспертная система выдающая совет о подарке на основе профиля человека в интернете. От клиента будет достаточно дать ссылку на блог того для кого он хочет сделать подарок а экспертная система выдаст наиболее подходящий вариант.

На первом этапе пишется скрипт по парсингу информации из блогов, вкотактов, чатов и форумов. На выходе должен получиться профайл человека в виде пола, возраста, профессии, образования и списка слов статистически важных для этого человека взятых из текстов которые он оставил в интернете.

Read more…

Categories: Post Russian Tags: ,

New study on stereotype about hormones and behavior

April 20th, 2009 Comments off

Stereotype about effect of sex hormones estrogen and testosterone on a risk taken behavior was backed up by studies. But in most cases it was correlation studies. To check this hypothesis a new study has been done by Niklas Zethraeus “A randomized trial of the effect of estrogen and testosterone on economic behavior“. This study shows what it was correlation, not a causation in later studies. This was a double-blind randomized study with two-hundred participants what is large enough to take significant statistic results.

Participants were randomly allocated to 4 weeks of treatment with estrogen, testosterone, or placebo. At the end of the treatment period, the subjects participated in a series of economic experiments that measure altruism, reciprocal fairness, trust, trustworthiness, and risk attitudes. There was no significant effect of estrogen or testosterone on any of the studied behaviors.
Contrary to our hypotheses, there were no significant differences between the 3 treatment groups for any of the studied economic behaviors (Mann–Whitney U test, P > 0.05 for all pairwise comparisons, 2-sided).

Categories: Blog Post Tags: ,