ek badi laujik machine mein (maan leejiye, sau se adhik laujik char waali) sambhav state ki ek khagoleeya sankhya ho sakti hai. jaahir hai, kaarkhaane mein, har state ka pareekshan avyaavahaarik hai agar har state ke pareekshan mein ek maaikrosekand lagta hai aur brahmaand ke shuroo hone se hi maaikrosekand ki sankhya se kaheen adhik state hain. durbhaagya se, yeh haasyaaspad lagne wala maamala vishisht hai.
veparaaijr ek upakaran hai jiska upayog paudhe ki saamagri ke sakriya tatv ko parishuddh karne ke liye hota hai. vanaspati ko jalaane ke badle sambhaavit pareshaani paida karne vaale jahareele ya Cancer paida karne vaale up utpaad ko tambaakoo se door karne hetu veparaaijr, saamagri ko ek aanshik vaikyoom mein itna tapaata hai ki paudhe mein upasthit sakriya yaugik khaulakar bhaap ban jaayein. dhoomrapaan saamagri sambandhi chikitseeya prashaasan seedhe paudhe ki saamagri ko garm karne mein aksar is vidhi ka upayog karta hai.
1945 mein lion theremin ne soviyt sangh ke liye ek jaasoosi upakaran ka aavishkaar kiya jo shravya jaankaari ke saath ghatna radio tarangon ko pun: sanchaarit karta tha. dhvani tarangein ek daayafraam ko hilaati thi jo rejonetar ke aakaar ko thoda badal deti thi, jo pratibinbit radio aavrutti ko modyulet kar deti thi. yadyapi yeh upakaran ek gupt shravya upakaran tha, na ki ek pehchaan taig, ise RFID praudyogiki ka ek poorvavarti maana jaata hai, kyonki yeh bhi vaise hi nishkriya tha, jo ek baahya srot se vidyutachumbakeeya tarangon dvaara shaktishaali aur sakriya ho jaata tha.[1]
fir bhi anya kootlekhit protokaul, anadhikrut paathakon ke khilaaf gopaneeyata haasil karne ke prayaas mein hain, haalaanki ye protokaul abhi anusandhaan charan mein hain. RFID taig ko surakshit karne mein ek badi chunauti, taig ke bheetar kampyooteshanal sansaadhanon ki kami hai. maanak kootalekhan takaneek mein adhikaansh kam keemat vaale RFID upakaranon mein upalabdh sansaadhanon ki tulana mein adhik ki aavashyakta hoti hai. RSA security ne ek prototaaip upakaran ko peteint karaaya hai jo sthaaneeya star par ek maanak takkar parihaar protokaul ke dakhal se RFID sanketon ko jaam kar deta hai, or prayokta ko agar vaanchhit ho to pehchaan rokane ki anumati deta hai.[64] vibhinn neetigat upaayon ka bhi prastaav kiya gaya hai, jaise ki RFID taig waali vastu ko ek udyog maanak lebal ke saath chihnit karna. RFID suraksha, kuchh varshon se ek bahut sakriya anusandhaan kshetr hai, jismein 2002 se lekar aaj tak 400 se adhik vaigyaanik pepar prakaashit kiye gaye hain. is kshetr mein sandarbh ki ek vyaapak soochi RFID Security and Privacy Lounge mein pai ja sakti hai.

1965 se lekar 2006 tak sanyukt raajya America mein dhoomrapaan ki dar 42% se girkar 20.8% tak aayi hai.[6] jin logon ne chhoda unamein adhikaansh peshevar, sampann log the. upabhog mein kami hone ke baavajood, prati din prati vyakti cigarette ki ausat khapat 1954 mein 22 se badhkar 1978 mein 30 ho gayi. yeh paraspar virodhi parinaam yeh spasht karta hai ki jin logon ne peena chhoda ve kam dhoomrapaan karte the, jabki ve log jinhonne dhoomrapaan karna jaari rakha ve adhik maatra mein halke cigarette peene lage.[37] yeh pravrutti kai audyogik deshon mein saamaantar chalti rahi jahaan bhale hi usaki dar baraabar rahi ya usamein giraavat aayi. haalaanki vikaasasheel duniya mein tambaakoo ki khapat mein 2002 mein 3.4% ki vruddhi jaari rahi.[7] Africa mein jyaadaatar ilaakon mein dhoomrapaan ko aadhunik maana jaata hai aur yeh majaboot pratikool rai hai ki pashchim mein is par bahut kam dhyaan diya jaata hai.[38] aaj roos tambaakoo ka sheersh upabhokta hai aur uske baad Indonesia, laaos, Ukraine, Belarus, grees, Jordan aur cheen hain.[39]

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purushon mein mahilaaon ki tulana mein dhoomrapaan ki lat paanch guna adhik hoti hain,[13] haalaanki chhote aayu varg mein is laingik antar mein giraavat aati hai.[14][15] viksit deshon mein purushon mein dhoomrapaan apne charam par pahunch chuka hai aur usamein giraavat aani shuroo ho gayi hai haalaanki mahilaaon ke maamale mein vruddhi barkaraar hai.[53]

aam taur par teen prakaar ke RFID taig hote hain: sakriya RFID taig, jismein ek baitari hoti hai aur ye sanketon ko svatantr roop se sanchaarit kar sakte hain, nishkriya RFID taig, jismein baitari naheen hoti aur sanket sancharan prerit karne ke liye ek baahari srot ki jaroorat hoti hai aur baitari samarthit nishkriya (BAP) jise jaagane ke liye baahari srot ki aavashyakta hai lekin ismein mahatvapoorn uchch fauravard link kshamata hai jo atyadhik pathan seema pradaan karta hai.
1612 mein jemsataaun ke avasthaapan ke chhah saal baad John raalf pehle adhivaasi hain jinhonne tambaakoo ki ek nakadi fasal ke roop mein safalataapoorvak kheti ki. tambaakoo ki maang mein teji se vruddhi hui, use "bhoora sona" kaha gaya, kyonki usane sone ke abhiyaan mein vifal varjeeniya ko share company mein punarjeevit kar diya.[21] puraani duniya ki maangon ko poora karne ke liye tambaakoo ki paidaavaar lagaataar ki gayi jiske parinaamasvaroop jameen ki urvara shakti sheegra hi kam ho gayi. isne pashchim ko ek agyaat mahaadveep mein basane ke liye prerak ka kaarya kiya aur isi tarah tambaakoo utpaadan ka ek vistaar hua.[22] bekan vidroh ke pehle tak anubandhit daasata hi praathamik shram bal ka aadhaar thi jiske kaaran das pratha par dhyaan kendrit hua.[23] yeh pravrutti ameriki kraanti ke baad kam hui aur daasapratha laabhaheen maani gayi. haalaanki yeh pratha 1794 mein punarjeevit ho gayi jab kapaas ki charkhi ka aavishkaar hua.[24][page needed]
1980 ke dashak mein mile vaigyaanik pramaan ke anusaar tambaakoo companiyaan ne daava kiya hai ki laaparavaahi baratne ka kaaran svaasthya par padne vaale pratikool prabhaav se pehle unka anajaan hona tha ya paryaapt vishvasaneeyata ka abhaav tha. svaasthya adhikaariyon ne 1998 tak in daavon ka saath diya jiske baad unhonne apni sthiti ulat di. tambaakoo pradhaan niptaan samjhauta (the tobaiko master saitalameint egreemeint) mool roop se chaar sabse badi tambaakoo companiyon aur 46 raajyon ke ameriki etorni general ke beech hua. tambaakoo ke kuchh khaas prakaar ke vijnyaaapanon par pratibandh laga diya gaya aur svaasthya muaavaje ke taur par bhugataan ko aavashyak kar diya gaya, jo baad mein sanyukt raajya America ke itihaas mein sabse bade naagrik niptaan ke roop saamane aaya.[36]

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