SCIENCE CAPSULES

              The PIN for your ATM card, your phone, your  high-end  bike  is  mostly  four-digit  code.  It is not so safe.   There  are 10  choices  for first  digit ( 0 .... 9), ten for second digit and so on.  Hence,  there  are totally 10*10*10*10 =10^4 = 10000 possible  4-digit  codes.  The computer can check all the choices in a blink of an eye.  That is why your online bank account, phones, ATM get locked if you try wrong PINs a few times in a row.       You can use words as passwords.  If you choose six-letter word,  there  will be 26^6 or 300 million words are possible in the  English  language.  Even  300 million  is not  a  big number   for the  computer. It  will check them out in a few seconds.  The  s crabble   dictionary lists about 20...

                  Can the students just use 'on-line essay services' and get  high grades ?             Can  anyone  just copy a 'project' and  submit ?       Today, mostly digital submission   is   ad vi sed .   We have lot of digital tools to find cheating and  plagiarized  articles.        Each person has their own unique vocabulary. It may be rich or limited.  Some people write in short sentences, some others prefer long sentences having many clauses.   Ev e n   different people  use  punctuation marks  d ifferently, that means, everybody has unique style of writing.  The style of writing  c a n   be  ana ly z e d   digitally,  and cheating can  be exposed .       Some people use some phr as e s   often .    Exam...