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Human fur patterns and their evolution
Fischer, Jan ; Tureček, Petr (advisor) ; Hora, Martin (referee)
Human fur, although absent on the first sight, is one of human unique features. But the question is, what influences shaped it into its current state. First part ergo the loss of dense fur coat stands on two main hypothesis. The first one being increasing effectivity of sweating for active diurnal lifestyle and the second one being parasite avoidance. There are other hypothesis, although not as reputable. These are aquatic ape hypothesis and importance of fire use hypothesis. The second part are the remaining parts of human fur patterns, some of which even expanded, scalp hair, beards, eyebrows, pubic and axillary hair. Most of these are explained thru hypothesis regarding the importance of communication in expanding human societies but there are also some talking about typical mammalian hair function - environment protection. Scalp hair are mostly explained as health, beauty and individuality signal but it also probably had protective function. Beards as extremely sexually specific trade helped in competition between men although in more of a demonstrative way. They also played role in sexual selection. Eyebrows are irreplaceable in face recognition, emotion expression and they also protect an eye from sweat. Axillary hair preserves armpits and hosts an axillary organ useful in chemical communication....
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Generování vlasů interpolací
Šik, Martin
This thesis describes a procedural hair generator that is able to generate hair from just a few hairs, called hair guides, which are directly modeled by a 3d artist. The procedural hair generator is a part of Stubble project -- a tool for hair modeling in Autodesk Maya. The procedural hair generator can generate hair during rendering, thus avoiding storage of hair geometry in a scene file, which makes the rendering process very efficient. Furthermore, hair can be generated interactively and displayed by OpenGL during modeling in Maya. Generated hair geometry is mainly defined by interpolation from the mentioned hair guides; however it is also influenced by many hair properties. These properties can change hair geometry using noise functions, define hair color, width and more. To determine hair root positions on a given triangular mesh I use my own mesh sampling algorithm that generates random samples on a triangular mesh according to a density defined by a 2-dimensional texture. My sampling algorithm uses an innovative way of sampling from a discrete probability distribution, which can be used in other applications than mesh sampling.
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Hair as a bioindicator of contamination of risk metals
Zmijová, Marie ; Řezáčová, Veronika (referee) ; Zlámalová Gargošová, Helena (advisor)
The use of hair as a bioindicator of environmental contamination by risk elements is becoming more and more common. This bachelor thesis deals with the use of this matrix for analysis using the voltammetric method. It focuses on the optimization of the method for determining the concentration of cadmium, copper, lead and zinc in real hair samples and monitors the effects on the incorporation of these elements into the hair fiber. The presence of zinc and copper was confirmed in all samples analyzed. Cadmium could only be quantified in one sample. The effect of gender and age on the concentration of elements has not been demonstrated. Concentration of lead has been linked to smoking, with higher concentrations found in smoker’s hair than in non-smoker’s.
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Untitled
Sláma, Matěj ; Poliačková, Martina (referee) ; Mazanec, Martin (advisor)
The subject of the bachelor's thesis is hair as a phenomenon, image, trauma, when in detail I explore this biological material on the basis of personal experience and as part of a series of experiments in the created "hair laboratory". Thematically, I focus on different concepts of hairstyle -- image vs. examine of biological glitches of hair growth. I organize a set of records, drawings, post-productions, objects or found materials into a database, which also became the inspiration for the actual installation of the project.
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An effect of the hairstyle symmetry on the female face attractiveness
LAPEŠOVÁ, Tereza
Diploma thesis deals with the effect of the hairstyle symmetry on the female face attractiveness. The aim of the thesis is to experimentally find out the possible relationship between the hairstyle symmetry and the attractiveness of the female face. To map out the views of attractiveness, an online questionnaire was submitted to the respondents of both sexes to evaluate female faces with a symmetrical and asymmetric hairstyles. A total of 56 images were created, which were evaluated by the respondents in terms of attractiveness on the scale of 1-10. Most respondents slightly favored the symmetrical hairstyles, only one sample of male respondents slightly favored the asymmetric hairstyles. Since the difference in symmetrical and asymmetric variations was not statistically significant in any case, it is possible to claim that the symmetry of the hairstyle does not affect the attractiveness of the female face.
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Natural GPU-friendly dynamic animation of human hair
Kmoch, Petr ; Pelikán, Josef (advisor) ; Váša, Libor (referee)
Natural-looking hair is a key component for presenting believable virtual hu- mans, because the head and face form natural focal points of the human figure. In non-static scenes, hair behaviour is just as important as its looks. Principles of physics and dynamic simulation are often used for animating hair, because other traditional animation approaches-such as skeletal animation or motion capture-are difficult to apply to hair. Dynamic animation of hair is still an open problem without a known best solution, because hair has quite specific mechanical properties which, combined with the high number of hairs typically comprising a hairstyle, make realistic and efficient simulation challenging. In this work, we focus on dynamic hair animation methods capable of provid- ing real-time or interactive performance while staying physically plausible. Basing on research and analysis of hair properties from the cosmetic industry, we have devised a novel hair animation method which provides more realistic results than existing comparable methods while at the same time offering better performance and stability. We have applied this method to two different approaches to hair animation in order to prove its independence on any particular representation of hair. In one of these approaches, our method allows us to replace an...
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Generování vlasů interpolací
Šik, Martin
This thesis describes a procedural hair generator that is able to generate hair from just a few hairs, called hair guides, which are directly modeled by a 3d artist. The procedural hair generator is a part of Stubble project -- a tool for hair modeling in Autodesk Maya. The procedural hair generator can generate hair during rendering, thus avoiding storage of hair geometry in a scene file, which makes the rendering process very efficient. Furthermore, hair can be generated interactively and displayed by OpenGL during modeling in Maya. Generated hair geometry is mainly defined by interpolation from the mentioned hair guides; however it is also influenced by many hair properties. These properties can change hair geometry using noise functions, define hair color, width and more. To determine hair root positions on a given triangular mesh I use my own mesh sampling algorithm that generates random samples on a triangular mesh according to a density defined by a 2-dimensional texture. My sampling algorithm uses an innovative way of sampling from a discrete probability distribution, which can be used in other applications than mesh sampling.
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Use of stable isotopes in hair for understanding nutrition and population migration
Tomášková, Anežka ; Brůžek, Jaroslav (advisor) ; Kovačiková, Lenka (referee)
The analysis of stable isotopes of teeth and bones shines a new light on bioarcheology, understanding of nutrition as well as mobility of mankind in past. However studying stable isotopes which can be found in animal or human hair (carbon - δ13 C, nitrogen - δ15 N, oxygen - δ18 O and probably more) provide information of the same quality. This kind of information is not enriching only to bioarcheology, but also to other fields connected to antropology such as forensic science or medicine. This paper delivers basic overview of principles of determinig the content of stable isotopes in biological material and show advantages and disadvantages of using hair. Information which are used for further understanding of nutrition, mobility and geo-origins are demonstrated on examples from bioarcheology, forensic and clinical medicine.
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