Efficiency Improvement of Small Induction Motors

V této bakalářské práci pojednávám o asynchronních motorech obecně, popisuji jejich konstrukci, princip činnosti, použití. Zahrnuje i měření konkrétního motoru a návrh motoru. V první části pojednává o principu činnosti motoru včetně základních možností řízení otáček a průběhu momentu. V druhé části pojednává o měření motoru a hledání velikostí ztrát. V poslední části je uveden návrh nového asynchronního motoru.In this bachelor´s thesis I discuss about asynchronous engines in general, describe their construction and principle of operation, using. It also includes measurements of a specific motor and design engine. The first part deals with theprinciple of the engine options including the fundamental control over speed and torque. The second part deals with the measurement of the size of the searchengine and losses. The last part provides a proposal for a new induction motor.

Comparison of isometric strength men´s upper limbs from the Czech Republic with a group of athletes from different sectors

The aim of this work was to find out the strength difference of the static flexors of the hand between the dominant and non-dominant upper limbs of sportsmen from chosen branches and general population. A group of 20 sportsmen (10 tennis players and 10 javelin throwers) and a group of general population (252 probands from the whole Czech Republic area) took part in the measuring. All tested people were aged 18 – 29. The measured values (in kg) were obtained by means of a test of handheld dynamometry (digital handheld dynamometer). The measuring showed that sportsmen have higher values of dominant upper limb isometric strength than general population (58.2 kg and 53.8 kg). With the non-dominant upper limb, the situation is reverse: higher values were discovered with general population (51.2 kg) whereas with sportsmen it was only 50.1 kg. A substantially higher difference of isometric strength between the dominant and non-dominant hand was discovered with sportsmen (8.1 kg); this difference is much smaller (2.1 kg) with general population

Isometric strength of the upper extremities in Czech men older than 18 years

The aim of this study was to compare isometric strength of the upper extremities in a sample of men from the Czech republic (n=638). Only the dominant upper limb was tested. The examined subjects were 18 years old or older. The measured values (in kilograms) were obtained via hand-held dynamometry testing (a digital hand-held dynamometer). The results of the hand-held dynamometry testing were compared across six age categories (18-29, 30-39, 40-49.... 70+ years). It was found that isometric strength of the dominant upper limb in men increases up to the age group 30-39 years and then declines. The highest average value (55.6 kg) was found in the age group 30-39 years, and expectably, the lowest values (34.4 kg) were documented in the age category 70+ years. The largest decline in isometric strength (-8.8 kg) was found between the age groups 60-69 years and 70+ years

The isometric strength comparison of the upper limbs of women from the Czech Republic with a group of sportswomen from various branches

The aim of this work was to find out the strength difference of the static flexors of the hand between the dominant and non-dominant upper limbs of sportsmen from chosen branches and general population. A group of 20 sportswomen (10 tennis players and 10 javelin throwers) and a group of general population (252 probands from the whole Czech Republic area) took part in the measuring. All tested people were aged 18 – 29. The measured values (in kg) were obtained by means of a test of handheld dynamometry (digital handheld dynamometer). The measuring showed that sportswomen have higher values of dominant upper limb isometric strength than general population (58.2 kg and 53.8 kg). With the non-dominant upper limb, the situation is reverse: higher values were discovered with general population (51.2 kg) whereas with sportsmen it was only 50.1 kg. A substantially higher difference of isometric strength between the dominant and non-dominant hand was discovered with sportsmen (8.1 kg); this difference is much smaller (2.1 kg) with general population

Analysis Of The Level Of Anthropometric And Strength Characteristics Of Male And Female Players Aged 11–12

Problematikou významu silových schopností ve sportu a v tenisu se zabývá mnoho autorů, v tenisu se síla projevuje především v razanci úderů, rychlosti podání a lokomoci pohybu. Cílem příspěvku je analýza úrovně základních antropometrických a silových charakteristik tenistů a tenistek, posouzení intersexuálních rozdílů a zjištění míry závislosti mezi antropometrickými a silovými charakteristikami. Výzkumný soubor je tvořen českými tenisty (n = 221) a tenistkami (n = 193) ve věku 11,0-12,9 let. Výzkumná data byla získána v letech 200-2010 pomocí testové baterie TENDIAG 1. Analýza výzkumných dat prokázala, že pocházejí z normálního rozložení. Úroveň základních antropometrických a silových proměnných je vyjádřena pomocí základních statistických charakteristik pro jednotlivé proměnné: soubor tenistů (n = 221, tělesná výška: V = 155,10 ± 7,62, hmotnost: H = 43,50 ± 6,68, maximální síla herní ruky: MS = 25,14 ± 4,59, relativní síla herní ruky: RS = 0,58 ± 0,09), soubor tenistek (n = 193, tělesná výška: V = 154,60 ± 6,94, hmotnost: H = 43,49 ± 7,17, maximální síla herní ruky: MS = 23,08 ± 4,61, relativní síla herní ruky: RS = 0,53 ± 0,09). Věcná významnost intersexuálních rozdílů byla posouzena pomocí Cohenova d, věcně významné rozdíly byly prokázány pouze v případě RS (d = 0,56, střední efekt) a MS (d = 0,45, nízký efekt). Věcně významná závislost byla u souboru tenistů prokázána mezi V a H (r = 0,71, r2 = 0,50; střední efekt), dále mezi V a MS (r = 0,59, r2 = 0,35; střední efekt) a mezi H a MS (r = 0,59, r2 = 0,35, střední efekt). U souboru tenistek byla prokázána věcně významná závislost mezi V a H (r = 0,75, r2 = 0,56; střední efekt), dále mezi H a MS (r = 0,64, r2 = 0,41, střední efekt) a rovněž mezi maximální a relativní silou (r = 0,58, r2 = 0,34; střední efekt).The issues of the significance of strength capabilities in sport and tennis are dealt with by many authors. In tennis, the strength of the playing arm primarily manifests in the speed of strokes, serve and locomotion movement. The goal of this paper is the analysis of basic anthropometric and strength levels of male and female players and to compare and evaluate inter-gender differences of anthropometric and strength characteristics. The research sample consisted of Czech junior male tennis players (n = 221) and female players (n = 193) in the ages between 11.0 and 12.9 years. The data for this research was gathered during 2000-2010 period by regular testing using a test battery TENDIAG 1. Analysis of acquired data showed normal distribution characteristics. The values measured were; anthropometric and strength levels statistic characteristic variables in the set of male tennis players (n = 221, body height: H = 155.10 ± 7.62, body weight: W = 43.50 ± 6.68, strength of playing hand: SH = 25.14 ± 4.59, relative strength of playing hand: RS = 0.58 ± 0.09) and female tennis players (n = 193, body height: H = 154.60 ± 6.94, body weight: W = 43.49 ± 7.71, maximum strength of playing hand: SH = 23.08 ± 4.61, relative strength of playing hand RS = 0.53 ± 0.09). Inter-gender differences between male and female tennis players were assessed using Cohen’s d values, substantial significant differences in mean values between male and female players were detected but only in the relative strength of gaming hand (d = 0.56, mean effect) and maximum strength level of game hand (d = 0.45, low effect). The size of effect was significant in the sample tennis players demonstrated between H and W (r = 0.71, r2  = 0.50; mean effect), among H and MS (r = 0.59, r 2  = 0.35; mean effect) and between MS and W (r = 0.59, r 2  = 0.35, mean effect). In a group of female tennis players has been demonstrated size of effect relation between H and W (r = 0.75, r 2  = 0.56; mean effect), among W and MS (r = 0.64, r 2  = 0.41, mean effect) and also between the maximum and the relative strength (r = 0.58, r 2  = 0.34; mean effect)

Communication Strategies and Self-Presentation in Professional and Personal Life

Na základě komplexního studia domácí i zahraniční literatury o teorii a praxi sociálních rolí provedu etnografický a částečně autoetnografický průzkum toho, jaké vlivy a vzájemné vztahy panují mezi osobními a profesními podobami (sebe)prezentace. Důležitým teoretickým východiskem mi přitom budou poznatky goffmanovské sociologie a tradice interakcionismu, které z ní vycházejí.Based on a complex study of Czech and international literature on the theory and practice of social roles, I will conduct an ethnographic and partly autoethnographic, research on influences and interrelations that can be observed in both personal and professional forms of self-presentation. An important theoretical basis for me will be the knowledge of Goffman´s sociology and the traditions of interactionism that stem from it.Fakulta filozofickáStudent představil svou diplomovou práci. Byly přečteny posudky vedoucího a oponenta práce. Student odpověděl na otázky členů zkušební komise

Images of the others in Czech public space; the case of migration crisis

Práce pojednává o analýze procesu vytváření diskurzivních obrazů druhého v českém veřejném a zejména mediálním prostoru za využití antropologických přístupů kombinovaných s vybranými metodami mediálních studií. Autor se zaměřuje zejména na fenomén veřejného diskurzu, který zasazuje do přímé spojitosti s tématem uprchlické krize. Výzkum spočívá ve snaze analyzovat jednak české mediální prostředí a jednak jednotlivé motivace subjektů participujících k uprchlické krizi.This thesis deals with the analysis of the discursive process of creating images of the other in the Czech public and especially the media space while using anthropological approaches combined with selected methods of media studies. The author focuses on the phenomenon of public discourse, which he associates with the theme of refugee crisis. The research consists in analyzing both Czech media space and individual motivation of subjects involved in refugee crisis.Fakulta filozofickáStudent odpověděl na připomínky vedoucího práce i autorky oponentního posudku