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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Ontogeneze vokalizace u gibonů rodu Nomascus / The ontogeny of vocalisation in gibbons Nomascus

Hradec, Michal January 2016 (has links)
Knowledge of the ontogeny and development of vocalization in primates play a crucial role in understanding the evolution of the human language. Unlike the great apes, gibbons produce a remarkable vocal performance, which includes complex species- and sex-specific patterns. Many studies in the past focused on research of the acoustic pattern in adult individuals. Yet, it remains unclear how the males develop their sex-specific pattern of vocalization. This dissertation focuses on two specific periods in the ontogenetic development of acoustic structures in male Northern-white cheeked gibbons (Nomascus leucogenys) and Southern-yellow cheeked gibbons (Nomascus gabriellae). The results showed that the first time immature males (juvenile and adolescent) produced female acoustically structured great calls in duets with their mothers. How the great call was structured in immature males differed from the great call of their mothers; the difference being in spectro-temporal parameters from. The most significant difference between juvenile and adolescent males in the production of female vocalization was the presence of a twitter vocalization towards the end of their call. The results show that the twitter was a regular part of female vocalization in juvenile males around four years of age, while younger males produced this vocalization exceptionally. The second period in the ontogeny of vocalization in immature males (adolescent) was characterized by the fact that after five years of age, the development of the male acoustic structure begins. During this period, we did not observe the production of the female vocalization great call in any of the monitored Nomascus gibbon individuals. Results show that the ontogenetic process of the male song in Northern-white cheeked gibbons (N. leucogenys) did not develop in the same sequence as in adults which produced different notes and phrases. The immature male (adolescent male) first time developed the multi-modulation phrase (coda) and the staccato note (syllables) simultaneously at the beginning of this study, but, it was observed that they started producing the boom note four months later. Conversely, the development of the acoustic structure in male Southern-yellow cheeked gibbons (N. gabriellae) was characterized only by the development of a multi-modulation phrase. Development of the staccato syllables was not noted in this species during the study. The results support the interpretation that the development of the male acoustic structure closely corresponds to the growth of the vocal tract and physiological changes associated with reaching sexual maturity.
2

Modular and ontogenetic evolution of virtual organisms / Modular and ontogenetic evolution of virtual organisms

Leibl, Marek January 2015 (has links)
Increase of computational power and development of new methods in artificial intelligence allow these days many real-world problems to be solved automatically by a~computer program without human interaction. This includes automatized design of walking robots in a~physical virtual environment that can eventually result in construction of real robots. This work compares two different approaches to evolve virtual robotic organisms: artificial ontogeny, where the organism first grows using an~artificial ontogenetic process, and more direct methods. Furthermore, it proposes a~novel approach to evolve virtual robotic organisms: Hypercube-based artificial ontogeny that is combination of artificial ontogeny and Hypercube-based neuroevolution of augmenting topologies (HyperNEAT). Powered by TCPDF (www.tcpdf.org)
3

Turecký vztyk (TGU) s kettlebell z pohledu vývojové kineziologie / The Turkish Get-Up in terms of developmental kinesiology

Růžička, Tomáš January 2017 (has links)
Title: The Turkish Get-Up in terms of developmental kinesiology Objectives: The main objective of this thesis is the comparison of the Turkish Get-Up and the positions in developmental kinesiology, the finding of potential similaties or differences and the reasoning behind those. Methods: The thesis is theoretical in character. The introduction outlines the prob- lematics of this exercise, its opportunities and benefits within rehabilita- tion, strength training and diagnostics. The objective is to describe the ex- ercise in detail in terms of kinesiology and biomechanics, and to introduce the wider context relating to it. The first part of the thesis deals with the theoretical approach to the history of the use of the kettlebell in sport and the the history of the Turkish Get- Up (TGU) and its variations. Next are the descriptions of the principles of muscle irradiation and biomechanical breathing match. In any work relat- ing to this exercise and everyday practice it is important to take these prin- ciples into account. The conclusion of the first part deals with the diagnost- ical options of the TGU in terms of fysiotherapy and the possibilities of the use of TGU in power training. Reasearch processing of the issues was built mainly on the use of periodic- als availible in the Czech Republic and...
4

Projev naklíčené a nenaklíčené sadby brambor / The manifestation of germinated and non germinated seed potato

ŠLECHTA, Josef January 2014 (has links)
The theme of this thesis monitoring of differences between crop yield potatoes from germinated and ungerminated planting. The theoretical part summerizes the basic information about potatoes and it pays attention to pregermention of potato plantig.
5

Hodnocení kvantity silice v dobromysli (Origanum spp.)

Gricová, Martina January 2019 (has links)
The topic of the thesis was evaluation of the quantity of essential oils in Origanum ssp. Main goals were to supplement the assortment with prospective cultivars, to describe the morphology and observe the ontogenesis of evaluated cultivars. To harvest plants in the term before flowering and in full bloom. To prepare samples for laboratory evaluation of the contents of the essential oils. To compare the content of essential oils in individual genotypes. Ten cultivars of the genus Origanum spp. were evaluated. The highest content of the essential oils had plants in the stage of full flowering. The work has been made on the grounds of the Experimental Garden ZF MENDELU in the vegetation period of 2018.
6

HUMAN BODY COMPOSITION DURING ONTOGENESIS

Koukou, Aikaterini January 2015 (has links)
1. ABSTRACT This diploma thesis refers to human body composition and its alterations by physiological and pathological processes that occur during different stages of life. Fat mass, fat free mass and total body water represent the major components of the human body which are modified during infancy, childhood, puberty, pregnancy and adulthood. Bioelectrical Impedance Analysis (BIA), Dual Energy Absorptiometry (DEXA), Computed Tomography (CT) and Magnetic Resonance Imaging (MRI) are some methods which are utilized for the qualitative and quantitative assessment of the body composition according to nutritional and pathological state of each individual, targeting the optimal clinical outcome. During growth, the amount of total body water elevates through infancy but it gradually declines in the next stages of life. Fat mass or total body fat possesses higher values during infancy, pregnancy and aging whereas it increases preferentially in female population at puberty. Muscle mass is elevated significantly in males during puberty and declines gradually due to aging. Osteoporosis, obesity and wasting diseases such as anorexia, cachexia and sarcopenia provoke severe disturbances in body composition compartments resulting in high rates of morbidity and mortality of the population.
7

Individuální hlasová variabilita a informace o rozeznávání predátorů obsažené ve vokální komunikaci morčat domácích (Cavia porcellus) / Information content in vocalization of guinea pigs (Cavia porcellus): individual distinction and recognition of predators

Baklová, Aneta January 2016 (has links)
Guinea pigs represent domesticated precocious rodents which became common pets. From the first day after birth they are fully vocal. This thesis was devoted to the vocalization of pups. The aim of the thesis was to 1) determine the age when the vocal individuality in whistle sound is demonstrable; 2) test possible ultrasonic signals emitted by young guinea pigs; 3) study the antipredator reactions and alarm calls to aerial (bird of prey) and terrestrial (dog) predators and human (control test). A total of 16 guinea pig pups were tested for vocal individuality, 28 pups for ultrasonic vocalization and 27 adolescents for predator recognition. When testing vocal ontogeny during the first 9 days after birth, I observed changes in temporal, frequency and parameter of intensity . When I test vocal individuality by cross-validated discriminant function analysis (DFA) based on ten acoustic parameters, calls were classified to correct animals with following success: day 1 = 71.9%, day 3 = 58.8%, day 5 = 53.10%, day 7 = 50.60% and day 9 = 63.10%. The highest frequency in whistle was 30.03 kHz. In predator discrimination reactions as freezing, fleeing and vigilance were observed. In the presence of dog, guinea pigs reacted for the longest time and most frequently by freezing. When confronted with a bird of prey, I observed for a longest time and most often fleeing and then freezing. When exposed to a human, guinea pigs showed mostly vigilance. Almost no vocalization was observed except for two events of alarm calls - drrr as in the presence of dog and chirrup as reaction to bird of prey. The following conclusions can be drawn from the presented results: 1) vocal individuality of guinea pigs is demonstrable immediately after birth and the rate of individually different vocal parameters changes with age; 2) guinea pigs are able to produce sound up to 30 kHz, i.e. within the ultrasound range, but signals of high frequencies are not crucial for their communication; 3) guinea pigs discriminate between terrestrial and aerial predators, but they emit alarm calls rather rarely.
8

Ontogeneze personality aneb opakovatelnost v behaviorálních a kognitivních testech / Ontogeny of personality or repeatability in behavioral and cognitive tests

Pšeničková, Eliška January 2021 (has links)
Individual stability is important for the development of personality, and above all two patterns of consistency - structural and differential. The main goal of this diploma thesis was to monitor changes in the repeatability of behavior over time (i.e., differential consistency) during ontogenesis and to compare the consistency of selected elements of behavior in behavioral tests and a selected cognitive test. Testing of a model species of squamate reptile, the common leopard gecko (Eublepharis macularius), in standard behavioral tests and in a selected cognitive test across ontogenesis over three life stages (juvenile, subadult and adult phase) showed, after statistical examination, high estimates of repeatability and significant influence of ontogenetic phase. Behavioral consistency between juveniles and adults could increase or decrease for certain behaviors or remain consistent in only one phase of life. In the subadult period, the behavior was generally inconsistent, except for vocalization in the reactivity test, where it was demonstrated by high estimates of repeatability. The aim of testing in the selected cognitive test was to determine the non-cognitive component of variability, which could be explained by different personalities. Yet, cognitive styles associated with personality have not...
9

Organická paměť v embryonálním vývoji / Organic memory in embryonic development

Švorcová, Jana January 2012 (has links)
The submitted thesis deals with the topic of organic memory, its definition and function, as well as its conceptions from various historical points of view. I use the term "organic memory" in respect to some authors who have previously dealt with this subject (Elsasser 1987, Otis 1994, Barbieri 2003) and also as a term by which to represent a kind of memory distinct from neuronal/cerebral memory. The general memory metaphors (in the case of neuronal memory) are essentially connected with terms such as storage, matrix, or place. For rather materialistic conception of memory, it is also symptomatic that different states such as emotions or mental faculties can be concretely localized in the brain tissue. On the contrary, some philosophers described memory as a primarily temporal entity without connection to place or matter. The question of organic memory was already vivid in 19th century biology, linked to Lamarckian philosophy (Hering 1870, Haeckel 1876, Butler 1910). The organic memory ideas floundered between vitalistic and rather materialistic conceptions: the first attributed some psychological features to cells or memory particles; the second was based on physics or in Cartesian doctrine, and described memory as essentially localized as a kind of storage of traces or patterns of physical waves....
10

Histomorfologické změny varlat norků v postnatální ontogenezi

Klejzar, Tomáš January 1900 (has links)
No description available.

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