TECHWELCOME

 Time dilation. Generally people think that time is same for  all .the man sitting in home and watching TV and the man whose traveling in train..the time between these two people are different...and also there is time difference in 30th floor and ground floor of building (this difference is in micro seconds ..so we unable identify time difference...) In this article we try to know .. What meant by gravity..?? How gravity exists..?? What is special theory of relativity...?? How speed and gravity effect's on time..?? What is space time..?? At beginning Newton introduced some theory's about the universe they are.. *Universe follow same and constant time.. *The universe is in three dimensional shape.. And so on...but there are some mistakes in the theory's.. In 1905 Einstein introduced special theory of relativity this theory changed hole scientific world and in view of perspective of science.. *The time is different in different places . *Only light speed Is constant ..in al...

   Mobile sim cards. Sim card stands for subscriber identify module .the SIM card is developed in the year 1991 by the German company Gieseke and deverient they sold 300 sim cards to radiolinea . Which is wireless network operator in 1992..they sold first GSM Mobile phone with a sim card it was nokia 1101 .. Today it is hard to find a person who's never used a sim card ..there are over 7billion gadget's around the world use them to make calls, messages and web surfing ..experts predict this number is going to grow 20 billions ... The largest SIM card manufacturing company is gemalto..with headquarters in Amsterdam and 1500  employees they're now working towards the mass production of SIM cards for 5G network ...the first sim card costs more then 1$ for each ..but Today then cost is very much reduced..a SIM card has unique identification information on it.. This unique I'd connect your phone number with your gadget's ..when some one dilling your number the call wi...

Indian education system When I was studying in school ,when ever the essay compition is conducted .. I use to write on indian education system.. because there are many faults, mistakes in Indian education system... They focus on only studies rather than the developing skills... They focus on only important questions then the practical knowledge.. They consider students those who's come first in the class ... The students have to study all the day..when coming to home ..parents send for tuitions ..here there is no scope for playing ... Parents compare  student studies with other students ..but they do not compare their own child special talents... They do not consider your own answer in the exam ..they only care's what is the answer in the book... When new education policy is introduced..they solved all above problems... The first education Policy is introduced in 1968 in Indira Gandhi government ... The 2nd education policy is implemented on 1986 in Rajiv Gandhi government.... ...

          After B tech            you completed your Ssc or CBSC with good GPA ..and choose inter and scored with nice marks ...after you enter  in b tech it's ok ,if you have a good plan about your studies ..but the reality is most of students confuse to choose right path,(without having any plan) ..if you are persuing b tech 3 rd or final year.some Times which comes to our mind, what is after the b tech ... In this article I will try explain all the possible ways ...now what I'm going to tell is according to my view... After b tech you have two ways to go .. 1) job .. 2) master's... If you planning for a job .there are two types of jobs in the Market right now.... A) SERVICE ORIENTED JOBS ... The company which recruit students in college..like Wipro, TCS , CTS,infosys , IBM...etc this jobs comes under service oriented jobs... B) products based companies  The product based companies will be working on their own products ...

            Internet     On an average ,Every day 4.57 billion people were active internet users ..as of July 2020 . .it is about 59 percentage of global population... Using for shopping, checking mails,seeing posts in social media...etc.. Google, Yahoo such popular search engines is used to calculate the internet usage .. there are only 1 percentage of information using most of people in internet .. remaining 99 percentage is deep inside the internet ..lets  look what happening inside the internet .. there are two types of web's  surface web ,deep web.. Surface web   Which we use daily for browsing .knowing about new things like Google Yahoo...etc Deep web ... This deep web accessed through some particular websites ..out of this a special website or app called TOR   . This website cannot revil the user information and   Create multiple layer virtual private network with encrypted connection through the server .. ...

           Paradox    Have you ever faced logic less or solution less questions and struggle  to get answers?? Today i am explain such logic less questions with answers ...yes it's interesting also which eats our mind ....!! Paradox is nothing but a solution less or logic less questions ..it may be word, sentence, statement or phrases....and it is derived from Greek .... Sometimes paradox might have answers sometimes not... simply we can say paradox is a puzzle... Lets deep dive into some crazy paradoxes . grandfather paradox... You may heard about the time travel right ...just think if you got a time machine ..you travel to past .. let's think you travel to 70s or 80s ..you visited your grandpa's home before get married with your grandma .and you stopped marring of both grandma and grandpa .. here  some questions rises..   if your grand parents do not get married you exits right now?? ... And what are the effects in future .by crea...

    Mobile manufacturing When we woke up at early in the morning first thing is to check for mobile notifications. Then the day will be starts.. Mobile phones becoming part of our life .. Have you ever thought that how our mobile phones made??  Here i try to share knowledge about manufacturing of mobiles in step by step manner...   Mostly machines involved in manufacturing of mobiles.. This process starts from designing of prototype on PCBS ( printed circuit boards)  for faster printing they print 4 pcbs in a sheet...    Step 2 : this pcbs pass through a running belt..then an automatic computer which identifies errors in PCBs ..if the circuit which printed on board is incorrect then it entimets... In step 3 .. After checking PCBs then they reach to mounting machine using conveyarbelt ..then mounting machine start inserting  components ( resistors , capacitors) and main components like CPU,RAM,ROM..etc fix to PCBs using soldering material... Step 4...

 Quantum computing                  If you are using computer from past few years  to till now ..you  observed how fast the processing power is increased ...the number of transistors in chipset has increasing year by year .     .. now it is reached to 7 nano meter ....in this article we try to find how Quantum computer replace our traditional computer... And also we try to know  What is Quantum computer?? How Quantum computer's work?? What is the difference between normal computer and super computer?? Traditional computer are work on binary language (0's and 1's) so we called digital computer's .. when it comes to processor the billions of transistors work as a switch .. through this complicated action we are processing the data ..year by year transistors size becoming smaller and smaller. Everything has limit right ..we cannot go beyond that limit ... We reached that limit the size of transistor integrated on ...

        Hyper threading                When we try to buy new laptop. we mostly prefer Intel processor's .there are lot of specifications to considered like clock speed,cache memory , number of cores ( dual ,octa, Hexa cores) hyper threading and etc... hyper threading (HT)  or hyper threading technology( HTT) Because of hyper thrending the cores in processor's visible as dubble the cores to OS ( operating system ) . If a dual core processor enabled hyper trending.. then it visible as quad core processor to operating system ... That means here we have 2 physical cores that visible as  4 virtual cores to operating system ..... First time Intel introduced this  hyper threading technology in Intel Pentium -4  and xenon processor ( this used in server's which  provide us internet) this technology available since from years back .. before understanding about the hyper threading we need to know about cores ...