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Thursday, March 1, 2012

The History of the Indian Rupee



In 1935, under the Paper Currency Act of 1861, the Raj was granted the monopoly of issuing notes, ending the practice of private and presidency banks. But these currencies continued to be in use till the RBI issued its own coins and notes. Interestingly, till about 50 years ago, other currencies besides the RBI’s existed in, for instance, Portuguese Goa and Hyderabad. The central bank’s first currency, issued in 1938, was a five-rupee note bearing the portrait of King George VI. This was followed by notes of 10, 100, 1,000 and, yes, 10,000 rupees.
In the subsequent years, global developments, security concerns and the high cost of minting money led to many changes in the motif and the material of the currency. In 1940, the one-rupee note was reintroduced as a wartime measure. The watermark was made more difficult to copy and the security thread was introduced in 1944 to counter high-quality forgeries of rupees by the Japanese during their assault on Burma in WW II.

There is no uniformity or regularity in the change of colour, security features or pattern. “It isn’t wise to change the design and features frequently as it inconveniences people. At the same time, to prevent forgeries, we can’t keep it constant,” says Alpana Killawala, the RBI’s chief general manager. The George VI series continued till 1947. After Independence, a new design one-rupee coin was released in 1949. After careful consideration, King George VI’s portrait was replaced by Asoka’s Lion Capital, though a portrait of Mahatma Gandhi was initially considered but rejected. In 1960, the Hirakud dam, a symbol of India’s industrialisation, replaced the elephant motif on the Rs 100 note.

During the first decade of Independence, the rupee was divided into 16 annas. Each anna was subdivided into either four pices or 12 pies. The Anna Series, introduced on January 26, 1950, was the first coinage of the Republic of India. It was continued for seven years, and then replaced with the decimal system, which divided the rupee into 100 naya paise. High inflation led to change in the metal for coins—from silver to nickel to aluminium to steel. Similarly, the paper currency has undergone a sea change—the economic crisis of the late 1960s led to a reduction in the size of notes and fears of black money in circulation led to the cancellation of high denomination notes like the Rs 1,000, the Rs 5,000 and the Rs 10,000 in 1978. But in 2000, the Rs 1,000 series were reintroduced with optically variable ink that changes colour on tilting. Given that the lifespan of a currency note is generally only two years, many of the paper currencies, such as the Rs 1 and Rs 2 notes, have now been phased out. The five-rupee note is due to be phased out too.

The coins and notes of today are all part of the Mahatma Gandhi series that came into use in 1996. The currency notes have complex watermarks, windowed security thread, a latent image of Gandhi and intaglio features for the visually handicapped. Further enhancements in 2005-06 raised intaglio printing and widened the security thread.

The lure of this must-see history of the rupee will be difficult to resist.

Schizophrenia patients’ ability to monitor reality may be helped by computerized training





People with schizophrenia who completed 80 hours of intensive, computerized cognitive training exercises were better able to perform complex tasks that required them to distinguish their internal thoughts from reality.
As described in the journal Neuron (2/22/12), a small clinical study conducted at the San Francisco VA Medical Center (SFVAMC) and the University of California, San Francisco (UCSF), tested the digital exercises as a new therapy for schizophrenia.
“We predicted that in order to improve complex cognitive functions in neuropsychiatric illness, we must target impairments in lower-level perceptual processes, as well as higher-order working-memory and social cognitive processes,” said Srikantan Nagarajan, PhD, a professor of radiology and biomedical imaging at UCSF and a senior author of the study.
When compared with their assessments before the training, schizophrenia patients who received 80 hours of computerized training over the course of 16 weeks became better at monitoring reality. This improvement coincided with increased activation in a key part of the brain: the medial prefrontal cortex.
“The medial prefrontal cortex is a critical higher-order brain region that supports successful reality-monitoring processes,” said Karuna Subramaniam, the study's first author, who worked directly with the patients in the study and analyzed their data.
How the Study Works
Schizophrenia strikes about 1 percent of all Americans and about 51 million people worldwide. It is one of the most intractable and difficult to treat psychiatric illnesses, with prognosis becoming progressively poorer the longer a patient has the disease, according to the study's senior author, Sophia Vinogradov, MD, professor and interim associate chief of staff for mental Health at SFVAMC and interim vice chair of psychiatry at UCSF.
One of the core impairments of the disease is losing a grip on what is real, she said. “Reality-monitoring is the ability to separate the inner world from outer reality," she explained. "It is a complex cognitive function that is impaired in schizophrenia."
In the study, the brains of 31 patients with schizophrenia and 15 healthy people used for comparison were scanned using functional magnetic resonance imaging (fMRI) while they performed a reality-monitoring task.
Then, 16 of the 31 patients with schizophrenia were randomly assigned to complete 80 hours of computerized training composed of auditory, visual and social cognitive exercises that included programs designed by the Posit Science Corporation. The other 15 patients with schizophrenia were assigned to play computer games for the same amount of time.
After 80 hours, all of the subjects repeated the original reality-monitoring task in the MRI scanner, to monitor brain activity associated with their ability to discern words they made up in their head (internally-generated information) from words the experimenter showed them (externally-presented information).
The reality-monitoring test consisted of a study phase and a retrieval phase. During the study phase, subjects read sentences with noun-verb-noun structures outside the scanner. These were simple sentences like: "The chicken crossed the road." During this study phase, the final word of each sentence was either presented by the scientists or it was left blank for subjects to make up and fill in themselves (e.g., "The rabbit ate the ___" to which the subject might write down, "carrot").
Then, 45 minutes later, the subjects performed the retrieval phase in the MRI scanner where their brain activity was monitored while they were shown pairs of nouns from the sentence list. They had to identify whether the second word in the noun pair was a word that they had previously generated themselves during the study phase ("rabbit-carrot") or was one that the experimenter had presented to them ("chicken-road").
Compared to their pre-training assessments, people who had received the computerized cognitive training were better able to distinguish between the words they had made up themselves and those that had been presented to them. Furthermore, analyses of the MRI data revealed they also had increased activity in the part of the brain (the medial prefrontal cortex) that governs these decisions.
“Interestingly, greater activation within the medial prefrontal cortex was also linked with better social functioning six months after training,” Subramaniam said. "In contrast, patients in the computer games control condition did not show any improvements, demonstrating that the behavioral and neural changes were specific to the computerized training patient group.”
What this suggests, said Vinogradov, is that “the neural impairments in schizophrenia are not immutably fixed but may be amenable to well-designed interventions that target restoration of neural system functioning.”
The study “sets the groundwork for what could be a new treatment approach in psychiatric illness – a new tool we could use in addition to medication, psychotherapeutic approaches or cognitive behavioral approaches,” she said.
The article, "Computerized Cognitive Training Restores Neural Activity within the Reality Monitoring Network in Schizophrenia" by Karuna Subramaniam, Tracy L. Luks, Melissa Fisher, Gregory V. Simpson, Srikantan Nagarajan, and Sophia Vinogradov appears in the Feb. 23 issue of Neuron.
This work was funded by the National Institute of Mental Health. Gregory Simpson, an author of the study, is a senior scientist at Brain Plasticity Institute, Inc. Sophia Vinogradov, also a study author, is a consultant to Brain Plasticity Institute, Inc., which has a financial interest in computerized cognitive training programs.
UCSF is a leading university dedicated to promoting health worldwide through advanced biomedical research, graduate-level education in the life sciences and health professions, and excellence in patient care.
Provided by University of California, San Francisco

"Schizophrenia patients’ ability to monitor reality may be helped by computerized training." February 29th, 2012. http://medicalxpress.com/news/2012-02-schizophrenia-patients-ability-reality-computerized.html
Posted by
Robert Karl Stonjek

Almost half of depression in adults starts in adolesence





(Medical Xpress) -- A new study by research psychologists at Bangor and Oxford Universities show that half of adults who experience clinical depression had their first episode start in adolescence. In fact, the most common age to see the start of depression is between 13-15 years-old.
‘Depression used to be a problem that first surfaced in middle-aged people’ says Professor Mark Williams of Oxford University who led the study with Professor Ian Russell and Rebecca Crane of Bangor University. ‘In recent decades, however, researchers began to find that patients were first becoming depressed at an increasingly young age, a trend that has contributed to depression becoming one of the most pressing health issues across the world’.
As part of the study, they assessed the age at which people first became depressed and its links to later mental health problems and suicidal feelings. The study involved 275 people who had suffered repeated bouts of depression. All were carefully assessed to determine at what age they had first experienced the combination of symptoms that would indicate clinical depression. In the article published this month in the Journal of Affective Disorders the researchers showed that 48 percent of these patients had first suffered the illness before the age of 18 years. In fact, the most common age of their first episode of depression was 13-15 years.
‘These results are important because depression is a problem that tends to return. If you’ve been depressed once, then you have a roughly 50:50 chance of becoming depressed again. If you have become depressed twice or more, then this risk rises to 70-80 percent.
Yet the good news is that there are things we can do to prevent it happening. Talking therapies such as Cognitive Therapy and Mindfulness-based Cognitive Therapy (MBCT) can have a major impact on the type of recurrent depression that starts early in life, and researchers are starting to examine how best to prevent depression before it becomes a life-long problem.
Rebecca Crane of the Centre for Mindfulness Research and Practice at Bangor University adds: 'The Mindfulness-Based Cognitive Therapy course offers people who are vulnerable to recurrent depression the opportunity to engage in a raining process which builds skills in recognising and responding wisely to the first signs of depression.'
'Over repeated episodes of depression unhelpful habitual patterns of thinking and feeling are established. Mindfulness-Based Cognitive Therapy teaches participants to recognise and respond to these patterns in new ways’. 'Here at Bangor University we offer mindfulness classes to the general public. These courses are open to everyone and so are not specifically aimed at people with recurrent depression - they do however develop the skills which research has demonstrated is relevant to people who are vulnerable to depression.'
Provided by Bangor University

"Almost half of depression in adults starts in adolesence." February 29th, 2012. http://medicalxpress.com/news/2012-02-depression-adults-adolesence.html
Posted by
Robert Karl Stonjek