background preloader


Facebook Twitter

Why do some people never get depressed? 30 January 2012Last updated at 12:23 By Geoff Watts BBC World Service Confronted with some of life's upsetting experiences - marriage breakdown, unemployment, bereavement, failure of any kind - many people become depressed.

Why do some people never get depressed?

But others don't. Why is this? A person who goes through experiences like that and does not get depressed has a measure of what in the psychiatric trade is known as "resilience". According to Manchester University psychologist Dr Rebecca Elliott, we are all situated somewhere on a sliding scale. Planning a Conference. Home » Resources » Leadership Exercises & Tips » Plan an Event, Conference, or Retreat » Planning a Conference Planning a Conference.

Planning a Conference

Acknowledging mistakes is key to advancement – and not just in science. Stephen Fry's Planet Word. Episode One: Babel Pt 1 of 4. Radio 4 - So You Want to Be A Scientist - Home. Quant trading: How mathematicians rule the markets. 26 September 2011Last updated at 00:22 By Richard Anderson Business reporter, BBC News Mathematicians and their trading programs are increasingly taking the place of professional investors in financial centres across the world Trading floors were once the preserve of adrenalin-fuelled dealers aggressively executing the orders of brokers who relied on research, experience and gut instinct to decide where best to invest.

Quant trading: How mathematicians rule the markets

Long ago computers made dealers redundant, yet brokers and their ilk have remained the masters of the investment universe, free to buy and sell wherever they see fit. New study says birds learn how to build nests. 26 September 2011Last updated at 00:01 Footage of southern masked weaver birds formed the basis of the study A new study has found birds learn the art of nest-building, rather than it being just an instinctive skill.

New study says birds learn how to build nests

Researchers from Edinburgh, Glasgow and St Andrews Universities studied film of southern masked weavers recorded by scientists in Botswana. This colourful species was chosen because individual birds build many complex nests in a season. Women on pill remember things differently.

Inventions Project TOK

Reindeer body clock switched off. Reindeer have to survive the light polar summer and dark polar winter Reindeer have no internal body clock, according to scientists.

Reindeer body clock switched off

Researchers found that the animals are missing a "circadian clock" that influences processes including the sleep-wake cycle and metabolism. This enables them to better cope with the extreme Arctic seasons of polar day, when the sun stays up all day, and polar night, when it does not rise. The team from the universities of Manchester and Tromso report their study in Current Biology journal. The body clock, or circadian clock, is the internal mechanism that drives hormone release on a rhythmic 24-hour cycle. Light also influences these hormonal rhythms, but in most mammals, this "circuit" also involves the circadian clock, which can influence the release of hormones without the influence of light. Anyone who has experienced jet lag is familiar with the effect of the body clock.

Professor Andrew Loudon from The University of Manchester took part in the study. Fish living in dark caves still feel the rhythm of life. 10 September 2011Last updated at 02:17 By Leila Battison Science reporter Millions of years of evolution in the dark have led to this Somalian cavefish losing its eyes, scales, and pigmentation.

Fish living in dark caves still feel the rhythm of life

A blind, cave-dwelling fish in Somalia knows what time it is, but its "day" is twice as long as ours. Most animals have an internal body clock, or circadian rhythm, that lasts around 24 hours and is modified by the light-dark cycle of a day. But an international team, whose research is published in the open access journal PloS Biology, shows that certain blind cave fish have a circadian rhythm that lasts almost two days. Rodin's Thinker cast vandalised in Argentina. 9 September 2011Last updated at 12:51 The sculpture is a popular tourist attraction in Buenos Aires A cast of Auguste Rodin's famous The Thinker sculpture has been vandalised in Buenos Aires.

Rodin's Thinker cast vandalised in Argentina

Supercomputer predicts revolution. 9 September 2011Last updated at 15:57 Sentiment mining showed a sharp change in tone around Egypt ahead of President Mubarak's ousting Feeding a supercomputer with news stories could help predict major world events, according to US research.

Supercomputer predicts revolution

A study, based on millions of articles, charted deteriorating national sentiment ahead of the recent revolutions in Libya and Egypt. While the analysis was carried out retrospectively, scientists say the same processes could be used to anticipate upcoming conflict. Theory of Knowledge. Internet Explorer users 'have below-average IQ' It found that Internet Explorer users scored lower than average, while Chrome, Firefox and Safari users were very slightly above average.

Internet Explorer users 'have below-average IQ'

Camino, Opera and Internet Explorer with Chrome Frame were scored "exceptionally" high. "The study showed a substantial relationship between an individual's cognitive ability and their choice of web browser," AptiQuant concluded. "From the test results, it is a clear indication that individuals on the lower side of the IQ scale tend to resist a change/upgrade of their browsers. " Geoffrey West: The surprising math of cities and corporations. Scientists warn of 'Planet of the Apes' scenario. Ethical rules needed to curb 'Frankenstein-like experiments' on animals. Go Figure: What can 72 tell us about life? 20 July 2011Last updated at 22:43 By Michael Blastland GO FIGURE - Seeing stats in a different way Is 72 the answer to life, the universe and everything?

Go Figure: What can 72 tell us about life?

It's definitely the answer to a few economic questions, says Michael Blastland in his regular column. You know the joke from The Hitchhikers Guide to the Galaxy in which the answer to the ultimate question about life, the universe and everything is 42? The World at 7 Billion: Can We Stop Growing Now? by Robert Engelman. 18 Jul 2011: Opinion by robert engelman Demographers aren’t known for their sense of humor, but the ones who work for the United Nations recently announced that the world’s human population will hit 7 billion on Halloween this year. Since censuses and other surveys can scarcely justify such a precise calculation, it’s tempting to imagine that the UN Population Division, the data shop that pinpointed the Day of 7 Billion, is hinting that we should all be afraid, be very afraid.

We have reason to be. The 21st century is not yet a dozen years old, and there are already 1 billion more people than in October 1999 — with the outlook for future energy and food supplies looking bleaker than it has for decades. Westerners 'programmed for fatty foods and alcohol' 14 July 2011Last updated at 14:26 Obesity levels have risen sharply in many western countries since the 1970s Westerners could be genetically programmed to consume fatty foods and alcohol more than those from the east, researchers have claimed. Scientists at the University of Aberdeen say a genetic switch - DNA which turns genes on or off within cells - regulates appetite and thirst. A good book offers the ultimate escape. It's not ADHD, Sir, it's in my genes. . .

Slime mould prefers sedatives, say researchers. 10 June 2011Last updated at 12:16 By Jason Palmer Science and technology reporter, BBC News The slime mould at centre sought out sleeping tablets (l) significantly more than honey (r) Proof and Science. RÓMPETE EL OJO. Fotos y noticias. Un pasadizo atraviesa dos habitaciones tapiadas con lívidos cerebros contenidos en frascos dispuestos en anaqueles. El pasaje va a dar a un pequeño recinto donde una anciana mujer, de baja estatura y ancho cuerpo, inclina ávida su cabeza cana sobre una mesa salpicada de más sesos.

Ella es la doctora Adriana Ciudad de Andrade, encargada del Museo de Patología del Instituto Especializado de Ciencias Neurológicas (IECN), donde se conservan más de tres mil cerebros destinados al estudio de las enfermedades mentales en el Perú. 7,000,000,000. Everything Bad is Good for You: How Today's Popular Culture is Actually Making Us Smarter (9781594481949): Steven Johnson. EndGame HQ full length version. Book Review - Soul Dust - The Magic of Consciousness - By Nicholas Humphrey. Probability distribution. In applied probability, a probability distribution can be specified in a number of different ways, often chosen for mathematical convenience: A probability distribution can either be univariate or multivariate. A univariate distribution gives the probabilities of a single random variable taking on various alternative values; a multivariate distribution (a joint probability distribution) gives the probabilities of a random vector—a set of two or more random variables—taking on various combinations of values.

Important and commonly encountered univariate probability distributions include the binomial distribution, the hypergeometric distribution, and the normal distribution. The multivariate normal distribution is a commonly encountered multivariate distribution. Introduction[edit] Probability theory. As a mathematical foundation for statistics, probability theory is essential to many human activities that involve quantitative analysis of large sets of data. Methods of probability theory also apply to descriptions of complex systems given only partial knowledge of their state, as in statistical mechanics. Is graphene a miracle material? Consciousness.