Abstract: Provided is a blood spatter simulation head model including a housing having the shape of a human head; a reservoir inside the housing and capable of storing blood; an injection tube connected to the reservoir and extending to a lower portion of the housing, the injection tube including an injection opening through which blood is injected; and a weight unit in a lower portion of the housing and supporting the housing.

Abstract: A tool strip mark generator capable of measuring applied force includes: a bottom surface on which at least a portion of a target surface made of a material capable of generating a tool strip mark, which is a tool-scraped stripe, is formed; a rotating member configured to be rotatable in a state of being spaced apart from the bottom surface; a moving member movable on the bottom surface by laterally coupling the rotating member to a coupling portion; a force sensor attached to one side of an outer peripheral surface of the rotating member and sensing force which is applied when a tool strip mark is generated on the target surface by inserting the tool; a measurer configured to measure an output signal of the force sensor and calculate information about the applied force; and a display configured to display information about the applied force calculated by the measurer.

Abstract: According to the present disclosure, a method of calculating an angle of impact of a bloodstain is performed by a device for calculating an angle of impact of a bloodstain and includes obtaining a captured image of an analysis target by using a camera, extracting a spatter stain included in the analysis target, by analyzing the obtained captured image, calculating a major axis length and a minor axis length of the spatter stain, estimating an angle of impact of the spatter stain by using the major axis length and the minor axis length of the spatter stain, and outputting the spatter stain and the angle of impact of the spatter stain.

Abstract: Provided is a method of estimating a speed of a vehicle includes obtaining time domain acoustic data from an acoustic storage apparatus when the vehicle passes over a horizontally grooved road; calculating frequency domain acoustic data from the time domain acoustic data by using Fourier transformation; calculating, from the frequency domain acoustic data, a resonance frequency of sound generated between tires of the vehicle and horizontal groovings in the road; and estimating the speed when the vehicle passes over the horizontally grooved road by multiplying the resonance frequency by an interval of the horizontal groovings.

Abstract: According to the present disclosure, a method of calculating a formation time of a perimeter stain is performed by a device for calculating a formation time of a perimeter stain, and includes obtaining a captured image of an analysis target by using a camera, extracting an image of a perimeter stain included in the analysis target, by analyzing the obtained captured image, calculating a major axis length and a width of the perimeter stain, estimating a formation time of the perimeter stain by using the major axis length and the width of the perimeter stain, and outputting the image of the perimeter stain and the formation time of the perimeter stain.

Abstract: Provided is a method of analyzing a tool trace, the method being performed by a tool trace analyzing apparatus including a camera unit and including obtaining a first image that is a three-dimensional (3D) image of the tool trace; displaying the first image on a screen; storing, in a database, second images that are 3D images of one or more tools and that correspond to a plurality of pieces of feature information of the one or more tools; when a specific tool is selected based on a user input, searching for a second image from among the second images in the database, the second image corresponding to the specific tool, and displaying the second image on the screen; matching the second image with the first image and thus generating a match image; and displaying the match image on the screen.

Abstract: Provided is a method of discriminating between bloodstains, the method including obtaining a captured image of an analysis target; analyzing the captured image and extracting a scattering image of a plurality of bloodstains in the analysis target; estimating a scattering angle of the scattering image; and determining the plurality of bloodstains to be an impact spatter bloodstain if the scattering angle is greater than a preset reference angle, and determining the plurality of bloodstains to be a cessation cast-off bloodstain if the scattering angle is less than the reference angle.

Abstract: A method is disclosed for analyzing single nucleotide polymorphisms (SNPs) of mitochondrial DNA (mtDNA) using a peptide nucleic acid (PNA) probe and a melting curve analysis, and more particularly, a method is disclosed for analyzing SNPs of mtDNA by the melting curve analysis of a PNA probe and mtDNA, in which the PNA probe is coupled with a reporter and a quencher. By using PNA probes labeled with a reporter and a quencher in the method for analyzing SNPs of mtDNA, the time and cost required for individual identification can be drastically decreased, initial analysis can be carried out in the event of a large number of inspections or mass casualties, and human identification information can be coded, and thus the method is very easy to manage and supervise.

Abstract: The present disclosure relates to a primer set for preparation of a library used for next generation sequencing (NGS), and a method and a kit for making an NGS library using the same. The method for making the next generation sequencing (NGS) library using the primer set according to the present disclosure is able to simply analyze large amounts of samples as compared to the existing method for making a library, which is effectively usable for analysis of target DNA sequences or for database construction, in large amounts of samples.

Abstract: The present invention relates to a method for detecting a mark that is invisible in the visible light region. Here, the invisible mark is displayed on a card using a characteristic according to which the color of light is changed by means of a refractive index difference according to media in the visible light region. According to the method for detecting the invisible mark, it may be quickly determined whether the card is a counterfeit card in an investigation. In addition, since it is unnecessary to repeatedly inspect the card to be checked using various wavelengths, the time required for determining whether the card is a counterfeit card may be reduced.

Abstract: A method for codec-based recovery of a video, which includes recovering an image by combining image decoding information and non-overwritten image frames, is provided. The method includes: a cluster extraction step of extracting a pre-cluster region; a region extraction step of extracting, from the pre-cluster region extracted in the cluster extraction step, an M frame region encoded using an MPEG-4 visual codec and an M decoding region; a combining step of combining the M frame region and the M decoding region extracted in the region extraction step and listing the combination; and a recovering step of decoding the M frame region and the M decoding region, listed in the combining step, to be recovered as an image.

Abstract: Disclosed herein is a forged seal imprint checking method which includes a step ST-101 of generating a reference seal imprint from a genuine seal (ST-110) and a step ST-121 of comparing a compared seal imprints with the reference seal imprint to calculate characteristic values of the compared seal imprint with respect to the reference seal imprint (ST-140). According to experimental results, forged seal imprints obtained by seals forged by etching a zinc plate or a resin plate can be recognized and forged seal imprints generated by seals forged through computer copy can be also recognized. Accordingly, an objective basis on which it can be determined whether seal imprints on documents are forged in civil and criminal cases can be provided to prevent errors which may be generated when seal imprints are inspected with the naked eyes or microscopes.