The aim of the thesis "Design and optimization of the heat pump" is the project documentation for building permits, finding a suitable source of heat and cold. The problem is solved for a Tesco hypermarket. The device is designed to meet the health, performance and functional requirements for indoor climate. The task of this device is to transport fresh air into the interior cover heat losses in winter and coverage heat gains during the summer. The theoretical part deals with the problem of heat pumps. Special mention is about heat pump air x air. Calculation and design part is a specific proposal, two air conditioners and optimizing for winter. The experimental part deals with the processing of data on existing rooftop units.

This thesis deals with study of dynamics of the swirling flow. The swirling flow occurs frequently in hydraulic machinery (e.g., vortex rope in draft tube of the hydraulic turbine) and often influences operation of these machines. For this reason, sufficient knowledge regarding this characteristic flow is necessary for subsequent improvement of hydraulic machines. The theoretical part of this thesis contains description of flow instabilities and their manifestations, notably Kármán vortex street and vortex rope. In the next part, two methods are applied to these two transient flows in order to identify their specific dynamic properties. The first method, Fourier transform, enables to find frequencies of transient flow. The second method, proper orthogonal decomposition (POD), enables to identify planar or spatial eigenmodes of a specific swirling flow. Proper orthogonal decomposition is used in this thesis to identify planar eigenmodes of Kármán vortex street and spatial eigenmodes of vortex rope.

In this diploma thesis called Water column separation under the hydraulic turbine runner during unsteady operating regimes are solved the pressure pulsations of the reverse water hamer. In the thesis is deduced a mathematical relationship of elaboration the numerice model which is based on equations of continuity and equations of forces equilibrium. Numerical model is created in MS Excel uses for computation the numerical method Lax-Wendrof that allows consideration of variable sound speed as function of static pressure and allows variable lenght step in computation domain. Reverse water hammer is in the thesis solved with consideration of rotating flow behind shut-off valve, where we expect forming of vortex rope. This situation can be applied on the closing water turbine which has vertex rope under turbine runner. Specifically for this thesis was carried out the experiment of the reverse water hammer. Constants going into numerical solution are optimalized with using experiment and pressure pulsation are compared between numerical solution and experiment.

The aim of this Diploma thesis is a description of gas heat pump (GHP) technology and the possibility of their usage in real life. Also units from the major manufactures of GHP units in the Czech Republic and abroad are evaluated from technical and economical point of view. The thesis as well includes a part where is decided if it is better to further develop GHP units with higher or lower performance. In the last part of thesis are cooling circuits designed for both lower and higher performance, than performance of existing GHP unit Polo 100. As a result, the units with higher performance are more perspective. Therefore heat plate exchangers, which serve as a condenser and an evaporator, are designed for unit with higher performance.

This diploma thesis deals with the energy efficiency of heat pumps, especially efficiency of air/water system. In the this thesis is simply described the principle of the heat pump and function of each component. It shows the issues of determining the parameters of performance of the heat pump and also describes verification in according to applicable standards. The diploma thesis gives an analysis of determining the energetical efficiency and calculation of coefficient of performance, in other words, the seasonal heating coefficient of performance. Seasonal energy efficiency of selected samples of heat pumps for the heating season is designated for specific climatic conditions.

V súčasnosti sa kladie veľký dôraz na znižovanie produkcie emisií, čistotu a kvalitu životného prostredia. Tieto trendy sa týkajú všetkých odvetví, tak isto aj stavebného priemyslu a vykurovania budov. Doposiaľ bolo najrozšírenejším typom vykurovania spaľovanie fosílnych palív. Do popredia sa však dostávajú tepelné čerpadlá a začínajú zaberať výrazný podiel trhu. Kvôli dopytu po tepelných čerpadlách vzrastá počet výrobcov a konkurencia. Cieľom výrobcov je zvyšovanie účinnosti tepelných čerpadiel a zároveň znižovanie výrobných nákladov na dosiahnutie lepšej pozície na trhu. Predložená práca sa zaoberá procesmi prebiehajúcimi v chladivovom okruhu tepelného čerpadla. Skúma správanie chladiva počas kondenzácie a možnosti zvýšenia účinnosti tepelného čerpadla. Zvýšenie účinnosti je dosiahnuté podchladením chladiva počas kondenzácie na zvýšenie tepelných ziskov. To je dosiahnuté zaradením druhého elektronického expanzného ventilu za kondenzátorom. Táto technológia je však finančne náročná. Práca sa zaoberá výpočtom kapiláry na základe praktických meraní, ktorá bude zadržiavať chladivo v kondenzátore a bude plniť podobnú úlohu ako expanzný ventil. Následne sú porovnané výsledky jednotlivých meraní. Výsledky sú porovnané voči jednoduchému systému, kde nedochádza k podchladeniu chladiva. V závere práce je analýza výsledkov jednotlivých systémov.

Abstracts in English, Zulu and Setswana / This study investigated the feasibility of using WhatsApp Messenger as a tool to enhance the professional identity and inquiry-based pedagogy through the professional development of university chemistry teachers. The epistemological interpretive paradigm was used to guide the study. The study assumed a naturalistic, exploratory investigation. The qualitative research methodology was used to conduct the study. Nine university teachers were purposively sampled from three universities (three teachers from each university) for the study. Data were collected through semi-structured interviews, participant observations, and focus group discussions. Data analysis was completed using the thematic networks analysis. Ethics considerations were observed by not disclosing personal information of the participants or information about the universities where they represented. This study was guided by four theoretical underpinnings: the connectivism theory, the transformative learning theory, the expectancy-value theory, and the dual systems theory. The primary research question guiding this study was: How does the professional identity of university chemistry teachers develop as they learn IBP through WhatsApp Messenger? A two-pronged approach was used in the research: (1) comparing the professional identity of the teachers before and after the course, and (2) observing and describing the professional identity process as the teachers undertook the course. The results from the interviews conducted before the teachers undertook the WhatsApp Messenger-based IBP course showed that most teachers had a negative professional identity. They had become teachers for a variety of reasons, but they did not consider themselves teachers and believed they would leave university teaching if opportunities arose in the industry. They had no formal qualifications in pedagogy, and they did not believe that such knowledge was necessary. The majority of these teachers used teacher-centred approaches. Results from participant observations during the WhatsApp Messenger-based IBP course showed that the course slowly imparted to the teachers the norms associated with not only IBP, but other teaching approaches as well. WhatsApp Messenger provided a flexible online platform where the teachers interacted and exchanged ideas without the need to meet in a physical space. The results from the interviews conducted after the teachers participated in the WhatsApp Messenger-based IBP course showed that the participants' professional identity had changed positively. They now recognised the importance of pedagogy in teaching, they positively identified with the teaching profession, and some were considering acquiring formal qualifications in pedagogy. / Lolu cwaningo beluphenya ithuba lokusetshenziswa kwangempela kwe-WhatsApp Messenger njengethuluzi lokuqinisa isithombe sesisebenzi kanye nohlelo lokufundisa olwencike phezu kophenyo lothisha besifundo seKhemistri (chemistry) enyuvesi, ngohlelo lokuthuthukisa abasebenzi. Uhlelo lwepharadayimu echazayo ye-ephistemoloji lwasetshenziswa ukuhlahla indlela yesifundo, okuyindlela enqume ukulandela indlela yemvelo, ephenyayo. Umethodoloji wocwaningo olwencike kuKhwalithi (Qualitative) lusetshenzisiwe ukwenza ucwaningo, ndawonye nothisha basemanyuvesi ayisishiyagalolunye abakhethwe ngenhloso kumanyuvesi amathathu (abathathu kwinyuvesi eyodwa). Idatha yaqoqwa ngokusebenzisa izinhlolovo ezimbaxambili (semi-structured interviews), ngokubheka izenzo zomdlalindima (participant observation) kanye nezingxoxo zeqembu eliqondiwe (focus group discussions), kanti ukuhlaziywa kwedatha kwenziwa kwaqedwa ngokusebenzisa uhlelo lokuhlaziya oluwuthungelelwano lwendikimba (thematic network analysis). Kubonakele ukulandelwa komgomo wokuziphatha ngokungadaluli ulwazi lomuntu ongumdlalindima noma ulwazi olumayelana namanyuvesi ababewameleyo. Ucwaningo beluholwa yizinhlaka ezine zethiyori: i-connectivism theory, i-transformative learning theory, i-expectancy-value theory kanye nama-dual systems theory. Umbuzo wokuqala wezocwaningo ohola ucwaningo bewuthi: Ngabe isithombe sobizo lobuthishela wekhemistri enyuvesi sithuthukiswa kanjani ngesikhathi befunda uhlelo lwemfundo eyencike ekuphenyeni (inquiry-based pedagogy (IBP) ngokusebenzisa i-WhatsApp Messenger? Indlela embaxambili iye yasetshenziswa: 1) ukuqhathanisa isithombe sobizo lobuthishela ngaphambi nangemuva kwesifundo,, kanye no-2) baqhathanisa isithombe sobizo lobuthishela sothisha ngaphambi nangemuva kwesifundo, kanye no 2) babheke futhi bachaza uhlelo lwezimpawu zokwakha isithombe sobizo lobuthishela njengoba othisha baye badlala indima kulesi sifundo. Imiphumela evela kwizinhlolovo ezenziwe ngaphambi kokuba othisha bahambele isifundo se-WhatsApp Messenger-based IBP, ikhombise ukuthi iningi lothisha libe nesithombe sobizo esibi. Baye bafundela ubuthishela ngezizathu ezahlukahlukile, kodwa abakaze bazibona bangothisha futhi baye bacabanga ukuyeka inyuvesi uma ngabe kuvela amathuba kwimboni. Abakaze babe neziqu zokufundisa, kanti abazange bakholwe ukuthi ulwazi olunjalo kwakunesidingo sokuba nalo, kanti iningi lothisha lwalandela indlela izindlela ezencike kuthisha. Imiphumela evela ekubukeni izenzo zothisha ngesikhathi sesifundo se-IBP ikhombise ukuthi isifundo kancane kancane sinikeze othisha izimfundiso ezithile, kanti futhi nezinye izindlela zokufundisa. Uhlelo lwe-WhatsApp Messenger lunikeze inkundla ye- inthanethi engenamngcele lapho othisha bebahlangana futhi baphakelane ngemibono nhlangothi zombili ngaphandle kwesidingo sokuhlangana endaweni ephathekayo. Ngemuva kwesifundo se-IBP abadlalindima baye babika ukuthi babone izithombe zobizo lwabo zizinhle kakhulu. Manje sebeyakwazi ukubaluleka kwendlela yephedagogi ekufundiseni, bazibona behambisane kahle kakhulu nobizo lobuthishela. Kanti abanye baze bacabanga ukuthola ezinye iziqu ezisemthethweni zobizo lobuthisha. / Thuto e, e dirile dipatlisiso tsa kgonagalo tsa go dirisa WhattsApp Messenger jaaka sediriso sa go tlotlomatsa tlhaolo ya borutegi le potsiso theo ya thuto ya sekolo ya barutabana ba Yunibesithi ba thuto ya khemise, ka tlhabololo ya borutegi. Go dirisitswe pharataeme ya phetolo ya episitemoloji go kaela thuto e e tsaletseng botlhagiso jwa tlhago le tlhotlhomiso. Thutatsela ya patlisiso e e boleng e ne ya dirisiwa go tsamaisa thuto, le barutabana ba ba robongwe ba diyunibesithi tse di neng di na le maikemisetso a bosupi go tswa mo diyunibesithi tse tharo (ba bararo go tswa mo go nngwe le nngwe ya tsona). Didatha di ne di kgobokantswe ka seka-popego sa dipuisano, kelotlhokomelo ya batsayakarolo le tsepamiso ya setlhopha sa dipuisano, fa tshekatsheko ya datha e feditswe ka go dirisa tshekatsheko ya kgokagano ya thitokgang. Kelotlhoko ya maitshwaro e ne e na le tlhokomelo ka go se senole tshedimosetso ya batsayakarolo kgotsa tshedimosetso ka diyunibesthi tse e leng baemedi ba tsona. Thuto e ne e kaelwa ke metheo e mene ya tiori: tiori ya kopano, tiori ya phetogo ya thuto, tiori ya boleng jo bo solofetsweng le tiori ya thulaganyo. Potso e kgolo ya patlisiso e e kaelang thuto e ne e le: tlhaolo ya borutegi e gola jaang mo barutabaneng ba yunibesithi ba thuto ya Khemise fa ba ithuta thuto ka theo-potsiso ya petakoji (IBP) ka WhatsApp Messenger? Go thapilwe tlhagiso e e tlhagelelang gabedi 1) go farologanya tlhaolo ya barutabana pele le morago ga khoso le 2) go ela tlhoko le go tlhalosa tshedimosetso ya tlhaolo ya borutegi jaaka barutabana ba batsayakarolo mo khosong. Dipholo tsa tsamaiso ya potsotherisano e e neng e le teng pele ga go tsena khoso ya WhatsApp Messenger-based IBP, di bontsha gore ba bantsi ba na le tlhaolo ya borutegi jo bo sa siamang. Ba ne ba nna barutabana ka mabaka a a rileng a a sa tshwaneng fela ba sa ipone sentle jaaka barutabana, ka megopolo ya go tlogela Yunibesithi fa ditšhono tsa intasetari di tlhagelela. Ba ne ba sena boatlhodi jwa semmuso ba petakoji, mme ba ne ba sa dumele gore kitso e jaana e a tlhokagala, ka bone bontsi bo ne bo tsaletswe ditlhagiso tsa go tsepama mo borutabaneng. Dipholo tsa kelotlhoko ya batsayakarolo mo nakong ya khoso ya IBP di bontsha gore khoso e e neetse barutabana ditlwaelo tse di rileng tse di sa tsamaisaneng fela le IBP gape le ditlhagiso tse dingwe tsa borutabana. WhatsApp Messenger e kgona go abelana mo polatefomong e e bonolo ya inthanete mo barutabaneng ba ba tlhaeletsanang le go abelana dikakanyo kwa ntle ga tlhokego ya go kopana mo lefelong ka sebele. Morago ga khoso ya IBP batsayakarolo ba begile gore ba leba ditlhaolo tsa bone tsa borutegi ka letshwao la koketso. Jaanong ba lemogile botlhokwa jwa petakoji mo go ruteng, se se tlhagisiwa ka letshwao la koketso mo boruteging jwa go ruta, ba bangwe ba ntse ba akanya go nna le boatlhodi jwa semmuso ka mo petakoji. / Curriculum and Instructional Studies / D. Phil. (Curriculum Studies)

The need for faster, more flexible and less risky ways for organisations to expand their capabilities and competencies increasingly lead to the formation and proliferation of networking strategies and partners. Understanding the potential contribution that CoP membership can provide within these teams is a step towards developing and refining a strategy to support and enhance the speedy progression of the team towards a productive phase. The study shows that membership of researchers to the same or similar CoPs have some impact on the norming stage, and assist in reaching the performing / productive stage faster in team development. The survey in particular has indicated that similar standards, practices, terminology, ethics, standards, peer recognition, trust and a sense of belonging have more of an impact on the productive phase of team forming, than on the norming phase. The hard factors such as terminology, standards and similar practices have a strong correlation with the softer factors such as a sense of belonging and trust. This information should be utilised in both the socialisation processes in academic institutions as part of the education of professionals, as well as organisational approaches to Research and Development (R&D), information sharing and development of the researchers. The paper also highlights emerging organisational and strategic Best Practices currently prevalent in R&D teams and collaborative projects. It is clear that research collaborations cuts across the whole spectrum of business and management areas - from strategy, across intellectual property issues, finance, strategic human resource management, R&D management and innovation, knowledge management, organisational values and culture, and many more. To support innovation and R&D on a strategic level, both internally and on inter-firm collaborations, requires a review of the total organisational strategy, culture and norms in an organisation. Innovation and R&D support should be a holistic approach, with strategic and pro-active risk management supported by appropriate strategic human resources management and systems. Literature on CoPs, teams, social capital (SC), knowledge management (KM), intellectual capital (IC), intellectual property (IP), strategy and governance provide theoretical grounding. / Business Leadership / Ph. D.

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Title: Evaluation of postural stability of athletes - a literature review Objectives: Thesis will address retrieval processing rating Dynamic Postural Stability of athletes . Compares analysis or results of research or investigations of different laborers working with this theme. It also mentions tests and machines used in clinical practice. It also investigates in what sports was postural stability tested and how or with what results. The most advanced, currently the most recognized dynamic posturography with impartial value is EquiTest device from NeuroCom. Therefore, the practical part focuses primarily on the results of examination of this device and make statistics about that. Methods: The diploma thesis has descriptive and analytical character. It is elaborate as a literary review . Results: The study includes 142 studies, of which only 11 concern the assessment of postural stability of athletes. Sports disciplines include tennis, football, baseball, tai-chi, taekwondo, gymnastics, basketball, softball. Entire EquiTest testing battery (which contains 7 test in total - Sensory Organization Test, Motor Coordination and Control Test, Adaptation Test, Unilateral Stance Test, Limits Of Stability Test, Rhytmics Weight Shift, Weight Bearing Squat) is almost never used in assessments although it's a...