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Title:Možnost določitve višine, s katere kaplja kri, na podlagi velikosti in morfoloških značilnosti krvnih madežev : magistrsko delo
Authors:ID Polič, Nika (Author)
ID Drobnič, Katja (Mentor) More about this mentor... New window
Files:.pdf MAG_Polic_Nika_2025.pdf (5,09 MB)
MD5: 8F20E6A34888E2B661098AB4FBD381F9
 
.zip MAG_Polic_Nika_2025.zip (436,97 MB)
MD5: 60C1C8EA76976C5CC23986115EEC6AB8
 
Language:Slovenian
Work type:Master's thesis/paper
Typology:2.09 - Master's Thesis
Organization:FVV - Faculty of Criminal Justice and Security
Abstract:naliza oblike krvnih sledi se uporablja na krajih kaznivih dejanj, kjer je prišlo do krvnih sledi. Uporablja se z namenom ugotovitve zaporedja dogodkov, položajev, v katerih so bile osebe, in predmetov, ki so bili uporabljeni. Pri analizi oblike krvnih sledi, ki so posledica krvi, ki je pravokotno priletela na tla, je glavni problem nepoznavanje volumna krvne kaplje, ki je ustvarila krvni madež, zaradi česar zgolj na podlagi velikosti premera krvne sledi ne moremo izračunati razdalje, ki jo je kri preletela, preden je pristala na tleh, torej višine. Skozi desetletja so se razvile različne metode in tehnike določanja izvora krvne kaplje. Osnovni postopki za določanje 3D-izvora krvi, ko kri ni priletela pravokotno na podlago, so poznani in v praksi uporabljeni že več kot 50 let, prav tako njihove omejitve in posodobitve. V praksi uporabne metode za določanje višine, s katere je krvna kaplja izvirala in pravokotno priletela na podlago, kjer madežev ne bi uničili, še ni. V magistrskem delu raziskujemo članek, kjer avtorji trdijo, da lahko uporabijo awalata barvilo kot kri in določijo višino, s katere je kaplja barvila padla pravokotno na podlago. V nalogi smo uporabili pravo človeško kri z antikoagulantom (K3EDTA) in poustvarili pogoje, pod katerimi so svoje poskuse delali avtorji. Nalogo smo razširili in poskuse izvajali z dvema različnima volumnoma krvi, na različnih podlagah in merili premer madežev, njihove žarke, satelite in povprečno oddaljenost njihovih satelitov, da ugotovimo, ali lahko iz teh spremenljivk določimo višino, s katere je krvna kaplja padla pravokotno na podlago. V nalogi ugotavljamo, da na podlagi morfoloških značilnosti krvnega madeža ne moremo ugotoviti višine, s katere je krvna kaplja izvirala in pravokotno priletela na podlago.
Keywords:morfološke značilnosti, krvne sledi, magistrska dela
Publication status:Published
Publication version:Version of Record
Place of publishing:Ljubljana
Place of performance:Ljubljana
Publisher:N. Polič
Year of publishing:2025
Year of performance:2025
Number of pages:XII f., 82 str.
PID:20.500.12556/DKUM-94572 New window
UDC:343.983.2(043.2)
COBISS.SI-ID:256760579 New window
Publication date in DKUM:11.11.2025
Views:150
Downloads:46
Metadata:XML DC-XML DC-RDF
Categories:FVV
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Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:21.08.2025

Secondary language

Language:English
Title:The possibility of determining the height of blood drops, based on size and morphological characteristics of bloodstains
Abstract:Bloodstain pattern analysis is used at crime scenes where bloodshed has occured. It is used to determine the sequence of events, the positions of people and objects that were used. When analyzing the shape of bloodstains resulting from blood hitting the ground perpendicularly, the main problem is not knowing the volume of the blood drop that created the bloodstain, which means that based solely on the diameter of the bloodstain, we cannot calculate the distance the blood traveled before landing on the ground. Over the decades, various methods and techniques have been developed to determine the height origin of a blood drop. The biggest challenge is to determine the height from which the blood fell perpendicularly onto the surface. The basic procedure, in which bloodstains are not destroyed in order to determine the 3D origin of the blood from the surface, has been known and used in practice for more than 50 years, as have its limitations and updates. Practical methods for determining the height from which a blood drop originated and hit the surface perpendicularly, where the stains would not be destroyed, have not yet been developed. In this thesis, we examine an article in which the authors claim that they can use awalata dye as blood and determine the height from which the dye drop fell perpendicularly onto the substrate. We used real human blood with anticoagulant (K3EDTA) and recreated the conditions under which the authors conducted their experiments. We expanded the task and conducted experiments with two different blood volumes on different surfaces and measured the diameter of the stains, their spines, satellites, and the average distance between their satellites to determine whether these IV variables can be used to determine the height from which the blood drop fell perpendicularly onto the substrate. In this paper, we conclude that based on the morphological characteristics of a blood stain, we cannot determine the height from which the blood drop originated and fell perpendicularly onto the surface.
Keywords:Blood drop, blood stain, morphological charachteristics of bloodstains, volume of blood drop, bloodstain pattern analysis


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