Knowledge

                                            Having a laugh Humans start developing a sense of humour as early as six weeks old, when babies begin to laugh and smile in response to stimuli. Laughter is universal across all human cultures and even exists in some form in rats, chimps, and bonobos. Like other human emotions and expressions, laughter and humour provide psychological scientists with rich resources for studying human psychology, ranging from the development of language to the neuroscience of social perception. Theories focusing on the evolution of laughter point to it as an important adaptation for social communication. Take, for example, the recorded laughter in TV comedy shows. Back in 1950, US sound engineer Charley Douglass hated dealing with the unpredictable laughter of live audiences, so started recording his own ‘laugh tracks’. These were intended to help peopl...

                            Environmental practices of big businesses The environmental practices of big businesses are shaped by a fundamental fact that for many of us offends our sense of justice. Depending on the circumstances, a business may maximize the amount of money it makes, at least in the short term, by damaging the environment and hurting people. That is still the case today for fishermen in an unmanaged fishery without quotas, and for international logging companies with short-term leases on tropical rainforest land in places with corrupt officials and unsophisticated landowners. When government regulation is effective, and when the public is environmentally aware, environmentally clean big businesses may out-compete dirty ones, but the reverse is likely to be true if government regulation is ineffective and if the public doesn’t care. It is easy for the rest of us to blame a business for helping itself b...

                                              The Developing World A.THE DEVELOPING WORLD – the economically underdeveloped countries of Asia. Africa. Oceania and Latin America – is considered as an entity with common characteristics, such as poverty, high birth rates, and economic dependence on the advanced countries. Until recently, the developing world was known as ‘the third world’. The French demographer Alfred Sauvy coined the expression (in French) in 1952 by analogy with the ‘third estate’ – the commoners of France before and during the French Revolution – as opposed to priests and nobles, comprising the First and second estates respectively. ‘Like the third estate’, wrote Sauvy, ‘the third world is nothing, and it wants to be something’. The term, therefore, implies that the third world is exploited, much as the third estate was exploited and that, like the third e...

                                                         Disorders: An Overview Autistic Spectrum Disorder Children with Autistic Spectrum Disorder have difficulty understanding what other people are saying, need help to play with other children, enjoy routines and find unfamiliar situations difficult. People with Autistic Spectrum Disorder can be good at creative activities like art, music and poetry. They can concentrate on one thing for a long time no they can become very good at something that they like doing. ADHD – Attention Deficit Hyperactivity Disorder People with ADHD have three types of problems. Overactive behaviour (hyperactivity), impulsive behaviour and difficulty pitying attention. Children with ADHD are not just very active but have a wide range of problem behaviours which can make them very difficult to care for and control. T...

                                                             Biometrics A. The term “biometrics’ is derived from the Greek words bio (life) and metric (to measure). It refers totechnologies for measuring and analysing a person’s physiological or behavioural characteristics, such as fingerprints, irises, voice patterns, facial patterns and hand measurements, for identification and verification purposes. One of the earliest known examples of biometrics in practice was a form of fingerprinting used in China in the 14th century. Chinese merchants stamped children’s palm prints and footprints on paper with ink to distinguish the young children from one another. This method of biometrics is still being practiced today. B. Until the late 1800s, identification largely relied upon ‘photographic memory.’ In the 1890s, an anthropologist and poli...

  The Triune Brain The first of our three brains to evolve is what scientists call the reptilian cortex. This brain sustains the elementary activities of animal survival such as respiration, adequate rest and a beating heart. We are not required to consciously “think” about these activities. The reptilian cortex also houses the “startle centre”, a mechanism that facilitates swift reactions to unexpected occurrences in our surroundings. That panicked lurch you experience when a door slams shut somewhere in the house, or the heightened awareness you feel when a twig cracks in a nearby bush while out on an evening stroll are both examples of the reptilian cortex at work. When it comes to our interaction with others, the reptilian brain offers up only the most basic impulses: aggression, mating, and territorial defence. There is no great difference, in this sense, between a crocodile defending its spot along the river and a turf war between two urban gangs. Although the lizard may stak...

                                            Making Time for Science Chronobiology might sound a little futuristic – like something from a science fiction novel, perhaps – but it’s actually a field of study that concerns one of the oldest processes life on this planet has ever known: short-term rhythms of time and their effect on flora and fauna. This can take many forms. Marine life, for example, is influenced by tidal patterns. Animals tend to be active or inactive depending on the position of the sun or moon. Numerous creatures, humans included, are largely diurnal – that is, they like to come out during the hours of sunlight. Nocturnal animals, such as bats and possums, prefer to forage by night. A third group are known as crepuscular: they thrive in the low- light of dawn and dusk and remain inactive at other hours. When it comes to humans, chronobiologists are interested in...

                          Information Theory – The Big Idea A In April 2002 an event took place which demonstrated one of the many applications of information theory. The space probe, Voyager I, launched in 1977, had sent back spectacular images of Jupiter and Saturn and then soared out of the Solar System on a one-way mission to the stars. After 25 years of exposure to the freezing temperatures of deep space, the probe was beginning to show its age. Sensors and circuits were on the brink of failing and NASA experts realized that they had to do something or lose contact with their probe forever. The solution was to get a message to Voyager I to instruct it to use spares to change the failing parts. With the probe 12 billion kilometres from Earth, this was not an easy task. By means of a radio dish belonging to NASA’s Deep Space Network, the message was sent out into the depths of space. Even travelling at the speed of ligh...

                                                            Tidal Power A Operating on the same principle as wind turbines, the power in sea turbines comes from tidal currents which turn blades similar to ships’ propellers, but, unlike wind, the tides are predictable and the power input is constant. The technology raises the prospect of Britain becoming self-sufficient in renewable energy and drastically reducing its carbon dioxide emissions. If tide, wind and wave power are all developed, Britain would be able to close gas, coal and nuclear power plants and export renewable power to other parts of Europe. Unlike wind power, which Britain originally developed and then abandoned for 20 years allowing the Dutch to make it a major industry, undersea turbines could become a big export earner to island nations such as Japan and New Zealand. B T...

                                                     Attitudes to Language It is not easy to be systematic and objective about language study. Popular linguistic debate regularly deteriorates into invective and polemic. Language belongs to everyone, so most people feel they have a right to hold an opinion about it. And when opinions differ, emotions can run high. Arguments can start as easily over minor points of usage as over major policies of linguistic education. Language, moreover, is a very public behaviour, so it is easy for different usages to be noted and criticised. No part of society or social behaviour is exempt: linguistic factors influence how we judge personality, intelligence, social status, educational standards, job aptitude, and many other areas of identity and social survival. As a result, it is easy to hurt, and to be hurt, when langu...

                                                          Nature or Nurture? A A few years ago, in one of the most fascinating and disturbing experiments in behavioral psychology, Stanley Milgram of Yale University tested 40 subjects from all walks of life for their willingness to obey instructions given by a ‘leader’ in a situation in which the subjects might feel a personal distaste for the actions they were called upon to perform. Specifically, Milgram told each volunteer ‘teacher-subject’ that the experiment was in the noble cause of education, and was designed to test whether or not punishing pupils for their mistakes would have a positive effect on the pupils’ ability to learn. B Milgram’s experimental set-up involved placing the teacher-subject before a panel of thirty switches with labels ranging from ’15 volts of electricity (slight sh...

                                          PLAY IS A SERIOUS BUSINESS A Playing is a serious business. Children engrossed in a make-believe world, fox cubs play-fighting or kittens teasing a ball of string aren’t just having fun. Play may look like a carefree and exuberant way to pass the time before the hard work of adulthood comes along, but there’s much more to it than that. For a start, play can even cost animals their lives. Eighty per cent of deaths among juvenile fur seals occur because playing pups fail to spot predators approaching. It is also extremely expensive in terms of energy. Playful young animals use around two or three per cent of their energy cavorting, and in children that figure can be closer to fifteen per cent. ‘Even wo or three per cent is huge,’ says John Byers of Idaho University. ‘You just don’t find animals wasting energy like that,’ he adds. There must be ...

                                      Alternative Medicine in Australia The first students to study alternative medicine at university level in Australia began their four-year, full-time course at the University of Technology, Sydney, in early 1994. Their course covered, among other therapies, acupuncture. The theory they learnt is based on the traditional Chinese explanation of this ancient healing art: that it can regulate the flow of ‘Qi’ or energy through pathways in the body. This course reflects how far some alternative therapies have come in their struggle for acceptance by the medical establishment. Australia has been unusual in the Western world in having a very conservative attitude to natural or alternative therapies, according to Dr Paul Laver, a lecturer in Public Health at the University of Sydney. ‘We’ve had a tradition of doctors being fairly powerful and I guess they are prett...

                              The Birth of Suburbia A. There is no single pivotal moment that could be separated out from any other as the conception of the suburban lifestyle; from the early 1800s, various types of suburban development have sprung up and evolved in their own localised ways, from the streetcar suburbs of New York to the dormitory towns outside of London. It is William Levitt, however, who is generally regarded as the father of modem suburbia. During World War II, Levitt served in the United States Navy where he developed expertise in the mass construction of military housing, a process that he streamlined using uniform and interchangeable parts. In 1947, the budding developer used this utilitarian knowledge to begin work with his father and architect brother constructing a planned community on Long Island, New York. With an emphasis on speed, efficiency, and cost-effective production, the Levitts...

 The Development of Travel under the Ocean A. For millennia, humans have been intrigued by what lies beneath the sea* and although submarine travel was attempted from time to time, it did not become commonplace until the middle of last century. Several clever and innovative people had experimented with designs for submersible boats before then, but there was much loss of life and little success. B. There had long been the use of a primitive diving bell for explorative purposes, but it was as a war machine that the submarine came into its own. The first development in the history of American submarines was a small submersible with a hand-cranked screw-like oar and a crew of one. It was built before the American Revolutionary War (1775—1783) but was adapted for use against the British during this war. Although its pilot twice failed to fasten explosive devices to British ships before losing control of his vessel, he escaped harm. C. In 1800, an American inventor, Robert Fulton, desig...

                            Vitamins To supplement or not? A. Mineral, vitamin, and antioxidant health supplements make up a multi-billion-dollar industry in the United States alone, but do they really work? Evidence suggests supplementation is clearly indicated in special circumstances, but can actually be harmful in others. For the general population, however, supplements have negligible or no impact on the prevention of common cancers, cardiovascular diseases, cognitive decline, mortality, or any other major indicators of health. In pursuit of a longer, happier and healthier life, there are certainly better investments for most people than a tube of vitamin supplements. B. Particular sub-groups of the population can gain a proven benefit from supplementation. Folic acid has long been indicated as a prenatal supplement due to its assistance in fetal cell division and corresponding ability to prevent neural tube birt...

                                 Austerity Measures A. Austerity measures are actions that a state undertakes in order to pay back its creditors. Those measures typically involve slashing government expenditure and hiking taxes, and most of the time, these are imposed on a country when its national deficit is believed to have become unsustainable. In this situation, banks may lose trust in the government’s ability or willingness to repay existing debts, and in return can refuse to roll over current loans and demand cripplingly excessive interest rates on new lending. Governments frequently then turn to the International Monetary Fund (IMF), an intergovernmental organization that functions as a lender of last resort. In return, the IMF typically demands austerity measures so that the indebted country is able to curtail its budget deficit and fulfil their loan obligations. B. A wave of austerity measures ...