Video: Dab tsi yog cov yam ntxwv ntawm chav kawm hauv forensics?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov yam ntxwv ntawm chav kawm tsis yog tshwj xeeb rau ib yam khoom tab sis muab cov ntaub ntawv pov thawj tshwj xeeb rau hauv ib pawg ntawm cov khoom. Cov yam ntxwv ntawm tus kheej nqaim cov pov thawj rau ib leeg, tus kheej qhov chaw. Hom phom phom uas tus neeg raug tua yog ib tug class yam ntxwv.
Tsis tas li ntawd, qee qhov piv txwv ntawm cov pov thawj hauv chav kawm yog dab tsi?
Piv txwv ntawm cov pov thawj hauv chav kawm muaj xws li ntshav hom, fibers, thiab pleev xim. Cov yam ntxwv ntawm tus kheej yog cov khoom ntawm lub cev pov thawj uas tuaj yeem raug ntaus nqi rau ib qho chaw uas muaj kev ntseeg siab. Piv txwv ntawm tus kheej pov thawj suav nrog txhua yam uas muaj nuclear DNA, cov cim, thiab ntiv tes.
Tom qab ntawd, lo lus nug yog, DNA puas yog cov pov thawj hauv chav kawm? Kev sib sau DNA pov thawj Lub cev pov thawj yog ib yam khoom tangible uas tuaj yeem txuas tus neeg ua txhaum cai rau qhov chaw ua txhaum cai. Tshuaj lom neeg pov thawj , uas muaj DNA , yog ib hom ntawm lub cev pov thawj . Txawm li cas los xij, lom pov thawj tsis yog ib txwm pom ntawm qhov muag liab qab.
Qhov thib ob, cov yam ntxwv ntawm cov phom yog dab tsi?
Ntawm cov mos txwv, cov cov yam ntxwv ntawm chav kawm yog cov rifling specifications ntawm lub chim los ntawm cov mos txwv raug rho tawm haujlwm. Cov no suav nrog caliber, tus naj npawb ntawm cov av thiab grooves, kev taw qhia ntawm twist ntawm cov av thiab grooves, thiab dav ntawm cov av thiab grooves.
Puas yog chav kawm ntiv tes lossis cov pov thawj ntawm tus kheej?
Chav kawm cov yam ntxwv yuav muaj cov treads ntawm cov log tsheb tshiab lossis khau, hom ntshav, thiab cov mos txwv tsis siv. Rau kev nkag siab zoo dua ntawm chav kawm yam ntxwv, saib cov yees duab hauv qab no. Tus kheej cov yam ntxwv muaj xws li DNA pov thawj , ntiv tes , thiab cov cim striation ntawm cov mos txwv uas tau raug rho tawm haujlwm.
Pom zoo:
Txoj kev faib cov ntaub ntawv twg muab cov ntaub ntawv sib npaug ntawm cov ntaub ntawv lossis cov kev tshuaj xyuas hauv txhua chav kawm cov ntaub ntawv?
Quantile. txhua chav kawm muaj cov yam ntxwv sib npaug. Ib qho kev faib tawm ntau yog zoo haum rau cov ntaub ntawv faib tawm. Quantile muab tib tus lej ntawm cov ntaub ntawv muaj nuj nqis rau txhua chav kawm
Cov yam ntxwv ntawm chav kawm yog dab tsi?
Piv txwv ntawm cov pov thawj hauv chav kawm muaj xws li hom ntshav, fibers, thiab xim. Cov yam ntxwv ntawm tus kheej yog cov khoom pov thawj ntawm lub cev uas tuaj yeem raug ntaus nqi rau ib qho chaw uas muaj kev ntseeg siab. Piv txwv ntawm tus kheej cov pov thawj suav nrog txhua yam uas muaj cov DNA DNA, cov cim, thiab cov ntiv tes
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