Autism is a disorder of neural development characterized by impaired social interaction and communication, and by restricted and repetitive behavior. These signs all begin before a child is three years old. Autism affects information processing in the brain by altering how nerve cells and their synapses connect and organize; how this occurs is not well understood. It is one of three recognized disorders in the autism spectrum (ASDs), the other two being Asperger syndrome, which lacks delays in cognitive development and language, and Pervasive Developmental Disorder-Not Otherwise Specified (commonly abbreviated as PDD-NOS), which is diagnosed when the full set of criteria for autism or Asperger syndrome are not met.
Autism has a strong genetic basis, although the genetics of autism are complex and it is unclear whether ASD is explained more by rare mutations, or by rare combinations of common genetic variants. In rare cases, autism is strongly associated with agents that cause birth defects. Controversies surround other proposed environmental causes, such as heavy metals, pesticides or childhood vaccines; the vaccine hypotheses are biologically implausible and lack convincing scientific evidence. (more…)
Archive for the ‘The Devoir’ Category
Autism
Posted: August 5, 2010 by Deepak Mishra in Social Awareness, The DevoirTags: Autism, Deepak Mishra, India, Social Awareness
Global Warming An Introduction
Posted: July 20, 2010 by The Devoir in Abhai Pathak, Deepak Mishra, Facebook, Santshubh, Social Awareness, Sushant Tripathi, The DevoirTags: Abhai Pathak, Deepak Mishra, India, Santshubh, Social Awareness, Sushant Tripathi
The global warming hypothesis originated in 1896 when Svante Arrhenius, a Swedish chemist, developed the theory that carbon dioxide emissions from the burning of fossil fuels would cause global temperatures to rise by trapping excess heat in the earth’s atmosphere. Arrhenius understood that the earth’s climate is heated by a process known as the greenhouse effect. While close to half the solar radiation reaching the earth’s surface is reflected back into space, the remainder is absorbed by land masses and oceans, warming the earth’s surface and atmosphere. This warming process radiates energy, most of which passes through the atmosphere and back into space. However, small concentrations of greenhouse gases like water vapor and carbon dioxide convert some of this energy to heat and either absorb it or reflect it back to the earth’s surface. These heat-trapping gases work much like a greenhouse: Sunlight passes through, but a certain amount of radiated heat remains trapped. (more…)
Need Support To Search This Missing Person
Posted: July 18, 2010 by The Devoir in Abhai Pathak, Deepak Mishra, Facebook, Normal, Santshubh, Social Awareness, Sushant Tripathi, The DevoirTags: Abhai Pathak, Deepak Mishra, Facebook, Normal, Santshubh, Social Awareness, The Devoir
Name: Sanjay Srivastava
Age: About 30Years
Hometown: Gonda,Uttar Pradesh
Colour :Whitish
Body Ethnic: Week
Hight:5′.6″
Physical Disability: Unable To Speak Properly But Able To Listen & Understand Everything Properly.
Date Of Missing: On 25/06/2010 From Basti,Uttar Pradesh
Award: Rs.5000/- (more…)