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Messages - anirban

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Science Discussion Forum / What causes Autism?
« on: July 09, 2012, 05:28:35 PM »

Autism is called idiopathic which means the cause of autism is unknown. As there are different levels of severity and combinations of symptoms in autism, there are probably multiple causes.
The best scientific evidence available today points toward a potential for various combinations of factors causing autism – multiple genetic components that may cause autism on their own or possibly when combined with exposure to as yet undetermined environmental factors. Timing of exposure during the child's development (before, during or after birth) may also play a role in the development or final presentation of the disorder.
A small number of cases can be linked to genetic disorders such as Fragile X, Tuberous Sclerosis, and Angelman's Syndrome, as well as exposure to environmental agents such as infectious ones (maternal rubella or cytomegalovirus) or chemical ones (thalidomide or valproate) during pregnancy.
There is a growing interest among researchers about the role of the functions and regulation of the immune system in autism – both within the body and the brain. Piecemeal evidence over the past 30 years suggests that autism may involve inflammation in the central nervous system. There is also emerging evidence from animal studies that illustrates how the immune system can influence behaviors related to autism. Autism Speaks is working to extend awareness and investigation of potential immunological issues to researchers outside the field of autism as well as those within the autism research community.
While the definitive cause (or causes) of autism is not yet clear, it is clear that it is not caused by bad parenting. Dr. Leo Kanner, the psychiatrist who first described autism as a unique condition in 1943, believed that it was caused by cold, unloving mothers. Bruno Bettelheim, a renowned professor of child development perpetuated this misinterpretation of autism. Their promotion of the idea that unloving mothers caused their children's autism created a generation of parents who carried the tremendous burden of guilt for their children's disability.

Reference:   The Autism Speaks website. [Online]. Available:

Science Discussion Forum / Re: What does validation means?
« on: June 14, 2012, 04:28:56 PM »
I think validation is a word which is suitable to the quality assurance in every field. In software development validation means to assure the development of software as per the customer's requirement. It can be defined by a question that is "Are we building the right product?". And another word of quality assurance called "verification" can be defined by another question which is "Are we building the product right?".

Science Discussion Forum / What is Autism?
« on: April 26, 2012, 04:32:33 PM »

Autism is a neural developmental disorder characterized by impaired social interaction and communication, and by restricted and repetitive behavior [1]. 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 [2].

Autism is a severe developmental disability that generally begins at birth or within the first three years of life. It is a neurological disorder that makes difficulties in the way of brain functionality- causing delays or problems in many different skills from infancy to adulthood. For example, both children and adults with autism usually exhibit difficulties in social interaction as well as in verbal and non-verbal communication. They also tend to be interested in odd, repetitive, or restricted activities. While the majority of autistic children look completely normal, they differ from other children by engaging in perplexing and distressing behaviors.

Autism belongs to a collection of developmental disorders known as the autism spectrum disorders (ASDs). A spectrum disorder is a group of disorders with similar features. While one person may have mild symptoms, another might have more severe ones. There are differences in the nature of the symptoms of different person.

The three different types of autism spectrum disorders are:

•   Autistic disorder (also known as "classic" autism): This is the most common condition among the ASDs. It causes difficulties with social interactions, delays in language and also results some unusual behaviors. Some people with autistic disorder also have impaired intellectual abilities.

•   Asperger syndrome: People with this syndrome display some of the milder symptoms of autistic disorder -- such as social challenges and unusual behaviors. They generally do not have any delays in language or impaired intellectual abilities.

•   Pervasive Developmental Disorder: They typically have milder and fewer symptoms than those with autistic disorder. Symptoms may be limited to problems with language and social interaction [3].

The discussion about autism cannot be limited in a small article. It is a vast area. Hope to continue in future with a series of articles...... :)


[1]    “Diagnostic and Statistical Manual of Mental Disorders”, 4th ed., text revision (DSM-IV-TR), ISBN 0-89042-025-4: American Psychiatric Association, 2000.
[2]   Levy SE, Mandell DS, Schultz RT, “Autism”, The Lancet, vol. 374(9701), pp. 1627–38, 7-13 Nov. 2009.
[3]   (Sep. 2009) The My Child without Limits website. [Online]. Available:

Nice post. Now a days lots of research are going on to give the computer Intelligence. Researchers have already been success to give some self organizing feature to computer.

Nice post....Please share about the technology used in this software.

Science Discussion Forum / Re: Imaginary Number
« on: April 26, 2012, 03:13:36 PM »

1. Is imaginary number a number?
2. What kind of number is i?
3. Where did the name imaginary come from?
4. Is it really an imaginary number? If yes then how did this number get involved into the real mathematics?
5. Can imaginary number do the same thing or different thing as real number do or more?

Lots of question..... ??? This post makes me curious....eagerly waiting for article with the answer of these questions

Good Concept....

Thanks a lot. your valuable comment will inspire me a lot to contribute more and more in the forum.

Very pragmetic idea!
Need profuse of data to make it comprehensive!

Thank you very much for your valuable comment. This is just the percentage of time that should be spend on the lifecycle phases of SDLC. will try to provide more data in future.

In many software organization it is a practice that they spent most of the time of Software development lifecycle (SDLC) in development phase that is in coding. But what should be the exact percentage of time to spent on coding? The percentage should be 20 -25 percent. The rest of the time should be spent on the other phase of SDLC. A good percentage should be spent on collecting requirements as this is the basement of total software. A very good percentage should be spent on design and a good percentage should be on testing. Most of us neglect the testing phase because of spending lots of time in development phase. Which can bring a disaster in any software development.

Based on studies reported in the general industry literature, the distribution of effort across the software development life cycle is typically along the lines of the following:

    Requirements: 15-20 percent,
    Analysis and Design: 15-20 percent,
    Construction (code and unit testing): 25-30 percent,
    System Testing: 15-20 percent,
    Implementation: 5-10 percent.

good post...hope DIU will provide a good contribution to fill up this need.

Software Fair as regular event / Re: Positive Bangladesh
« on: April 25, 2012, 03:34:57 PM »
Very good initiative will help a lot

Science Discussion Forum / Re: Poor wet strength of viscose!!!
« on: April 25, 2012, 03:32:32 PM »
Very innovative idea....good thinking... :)

Really Interesting!!!!

Shikha Anirban
Lecturer, SWE

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