1860 ke dashak mein ameriki naagrik yuddh tak usaka vikaas sthir raha, jab praathamik shram shakti daasata se sthaanaantarit hokar fasalon ka hissedaar bani. yeh, maang mein parivartan ke saath hua aur cigarette ke utpaadan ke saath tambaakoo audyogeekaran ki or badha. 1881 mein ek shilpkaar James bonasaik ne cigarette ke utpaadan ki gati badhaane ke liye ek machine ka utpaadan kiya.[29]
pipe dhoomrapaan mein aamtaur par tambaakoo ke dahan ke liye ek chhota sa kaksh (katora) aur ek patali nalika (danda) shaamil hai, jo mukhapatr (thoda) mein samaapt hota hai. tambaakoo ke kase tukadon ko kaksh mein rakha aur prajvalit kar diya jaata hai. pipe mein dhoomrapaan ke liye tambaakoo aksar bahut dhyaan dekar istemaal kiya jaata hai aur svaad ki baareekiyon ki mishrit upalabdhata anya tambaakoo utpaadon mein upalabdh naheen hai.
hamesha ki tarah ek tulyakaalik anukramik state machine ko ek sanyojan laujik mein vibhaajit karke laagoo karne ka vyaavahaarik tareeka hota hai aur flip flop ke set ko "state rajistar" kaha jaata hai. har baar ek ghadi tik tik ki signal deti hai aur state rajistar sanyojan laujik ke pichhle state se utpann pratikriya par kabja kar leti hai aur state machine ke sanyojan bhaag mein aparivrtineeya input ke roop mein fir se ise daal deti hai. sanyojan laujik mein samay ke khapat vaale adhikaansh laujik aakalan dvaara ghadi ki sabse tej dar set hoti hai.

san 2000 mein 1.22 log dhoomrapaan karte the. prachalan mein parivartan ka koi anumaan na lagaate hue yeh bhavishyavaani ki gayi hai ki 2010 mein 1.45 billion log aur 2025 mein 1.5 se 1.9 billion log dhoomrapaan kareinge. maan lein ki prasaar ek saal mein 1% kam hota hai aur aay mein 2% ki maamooli vruddhi hoti hai to dhoomrapaan karne vaalon ki sankhya 2010 aur 2025 mein anumaanit 1.3 billion hogi.[13]


design ke aadhaar par, EPCglobal Network bhi Dos hamlon ke prati kamzor hai. EPC deta anurodhon ko hal karne mein DNS ke saath aisi hi pranaali ka upayog mein, ONS root sarvar Dos hamle ke liye asurakshit ho jaate hain. EPCglobal Network ke saath shuruaat karne ki yojana bana raha koi bhi sangathan yeh gyaat hone par thithur jaaega ki EPCglobal Network ke buniyaadi dhaanche mein DNS ke samaan hi suraksha kamjoriyaan hain.

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