Perfusion magnetic resonance imaging is modern diagnostic method used mainly in oncology. In this method, contrast agent is injected to the subject and then is continuously monitored the progress of its concentration in the affected area in time. Correct determination of the arterial input function (AIF) is very important for perfusion analysis. One possibility is to model AIF by multichannel blind deconvolution but the estimated AIF is necessary to be scaled. This master´s thesis is focused on description of scaling methods and their influence on perfussion parameters in dependence on used model of AIF in different tissues.

This master’s thesis deals with the determination of dynamic modulus of elasticity non-destructive methods of brick body. The test samples were laboratory-made from two types of brick earth and further were used cotouts from the full brick types clinker. For measuring were used ultrasonic impulse and resonant-impact method.

Diploma thesis named Condensing steam turbine deals with heat scheme balancing computation of condensing steam turbine K55 and her design. This turbine with 5 unregulated take-offs and overpressure blading type, is computed with (c_a/u) method in the middle of blading diameter. Regulation degree is chosen with impulse blading and feet cross section is checked on durability. At the end of the thesis turbine consumption characteristic is derived from the zero output up to the nominal output. Integrated part of this thesis is conceptional design of longitudal turbine section.

This thesis is theoretically described heating surfaces, radiators and regulation valves. There are also described their features, advantages and disadvantages and division according to design. The aim of the work is determine the dynamics characteristics of heating surfaces and radiators including control valves, which are parts of measurement panel. Based on the measurement are determined appropriate characteristics of which are calculated values for regulating. The result of this study can serve as a guide to the practical measurement method of dynamics characteristics of the real-working heating systems, or serve as a template for the settings according to the measured data.

The thesis describes the procedure during the proposal of the driver circuits for the GaN MOSFET transistors, which are known for their fast switching especially. In the first instance of this thesis the issue of GaN MOSFET transistors is described and also the thesis describes the different types of MOSFET transistors in the way of their electrical and mechanical attributes. The specific type driver circuit is stated in the thesis, which was selected in the semestral thesis. For this circuit the boost converter with an output power 600W and high switching frequency 800kHz was proposed as an attempt measurement circuit. This boost converter was measured after its construction was done. The waveforms captured by the oscilloscope are commented also. In the conclusion the assessment is done about this new technology of power switching transistors.

China is a world force. Not only is China seen in the daily news but it has produced the largest church in the world. The church is 100 million people strong (Hattaway 2003:13). Since 1978, modern China has begun to populate the world community with her immigrants. Vast Diaspora communities have been created. The church in China shows all the signs of a Jesus People movement. In 1949 the communist came into power. They ordered all Christian missionaries to leave the country (Aikman 2003:44). By 1953 the last missionary had left (Thompson 1978:186). Mao closed the churches, confiscated property, burned books and bibles and had leaders sent to re-education camps. A time of persecution had begun. Rather than destroy the church, this made it stronger. The church grew from 750,000 to 100 million today. Can this Jesus People movement be experienced in the Diaspora community in South Africa? To evaluate this we use Allan Hirsch’s “The Forgotten Ways” (2006). In this he speaks of Apostolic Genius and the six elements that compose it. Thos elements are Jesus is Lord, Making Disciples, Missional-Incarnational Impulse, Apostolic Environment, Organic Systems and Communitas. These six elements are found expressed within a Jesus people movement. When they are all fully involved, a Jesus People movement is underway. There are 14 Chinese Christian churches in South Africa. The Chinese Diaspora community is 300-350,000 people. The Chinese mostly come from the Fujian province in China. Seventy percent are entrepreneurs and businessmen running shops selling Chinese goods. The researcher has found that the leadership of the churches is from Taiwan. Bringing everything together, the researcher finds the churches are growing at a moderate rate. The expected explosive growth of the church in China is not found in South Africa. The elements of Apostolic Genius are present but only partially expressed. There continues to be potential for the Chinese House church movement to field workers in South Africa. There has been some expressed interest. The Back To Jerusalem Movement is putting missionaries all over the Middle East (Hattaway 2003). It is the opinion of the researcher that putting workers in the Diaspora communities would be a natural extension of that that effort. / Dissertation (MA Theol)--University of Pretoria, 2013. / gm2014 / Science of Religion and Missiology / unrestricted

Impulse purchases on mobile applications are an important source of income for clothing companies in today's society. Thoughtful store communication on shopping apps is therefore necessary in the competitive clothing industry. Environmental elements are various communication tools in online visual merchandising (OVM) which have a great influence on consumers' purchasing behavior but whose impact on impulse purchases separately has not yet been explored. The purpose of the study is therefore to elucidate which environmental elements stimulate impulse buying behavior online on mobile shopping apps in the clothing industry. To investigate this, a qualitative study was conducted in the form of semi-structured interviews. According to the study, all environmental elements besides audio on video stimulate online impulse buying behavior on mobile shopping apps within the clothing industry. However, certain conditions exist for the execution of these environmental elements for this stimulus to occur. The study's results therefore show a problem that exists in securing which environmental elements stimulate impulse buying behavior when there are many embodiments of environmental elements that are experienced in different ways depending on who is exposed to them that causes an element to be able to stimulate but also prevent impulse purchases depending on this. / Försäljning genom impulsköp via mobilappar är en viktig inkomstkälla för klädföretag i dagens samhälle. Behovet av genomtänkt butikskommunikation på shoppingappar är därför stort i den konkurrenssatta klädbranschen. Miljömässiga element är olika kommunikationsredskap inom online visual merchandising (OVM) som har stort inflytande på konsumenters köpbeteende men vars påverkan på impulsköp var för sig ännu inte har utforskats. Syftet med studien är därför att belysa vilka miljömässiga element som stimulerar impulsköpbeteende online på mobila shoppingappar inom klädbranschen.  För att undersöka detta har en kvalitativ studie genomförts i form av semistrukturerade intervjuer. Enligt gällande studie stimulerar alla miljömässiga element förutom ljud till video till impulsköpbeteende online på mobila shoppingappar inom klädbranschen. Dock förekommer vissa premisser för utförandet av dessa miljömässiga element för att denna stimulans ska ske. Studiens resultat visar således en problematik som förekommer vid säkerställandet av vilka miljömässiga element som stimulerar till impulsköpbeteende då det förekommer många utföranden av miljömässiga element, som i sin tur upplevs på olika vis beroende på vem som exponeras för dem att det gör att ett element många gånger verkar kunna stimulera men också förhindra impulsköp beroende av detta.

Design idea generation is a significant part of a designer’s work and most frequently associated with creative problem solving. However, an outstanding challenge in design is translating empirical findings into ideas or knowledge that inform design, also known as generating implications for design. Though great efforts have been made to bridge this gap, there is still no overall consensus on how best to incorporate fieldwork data into the design idea generation process. The generation of design ideas is a process that is rooted in individual knowledge and is often considered a precedent-based type of reasoning, where knowledge is continuously transformed to produce new knowledge and this creative leap across the divide is very difficult. And it is believed that designers could potentially benefit from external stimuli that would provide a starting point or trigger and make the ideas generation more efficient. Most researchers have examined when and what type of stimuli designers used to support design idea generation. Nevertheless, it is still not clear how the different types of stimuli are retrieved and transformed during idea generation phases, and the knowledge transformation during this phases need to be clarified. In order to resolve this issue I conduct an open-ended semi-structured qualitative interview to learn about student and professional designers’ knowledge on how they select stimuli and transform it into design ideas, then compare with professor’s opinions. The interview would be conducted in terms of one-on-one face to face or online interview depending on the availability and accessibility of the interview respondents which would be audio recorded. Knowing more about how different designers, especially professional designers, to retrieve and transform preferred stimuli into ideas, and the design thinking involved in the process, is a significant step towards investigating the influence of stimuli during idea generation. Ultimately, I intend to build a general mechanism for designers to conduct an appropriate selection of functionally useful stimuli to transfer empirical findings to knowledge that inform design. The results try to help professional designers get more scientific structure, give student designers Visual Knowledge Media more practical guidance, but also help design education refine design idea generation methods and improve resulting techniques to discover a dynamic balance among theory and practice.

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Die vorliegende Dissertation befasst sich mit Entstehungsmechanismen kardialer Arrhythmien auf der Grundlage pathologisch veränderten Myokards. Es wurde eine systematische Analyse der elektrophysiologischen Veränderungen, die als Folge von Gap-Junction- Lateralisierung und zellulärer Hypertrophie auftreten, durchgeführt. Die Analyse beruht auf einem mathematischen Computermodell, das zur Simulation der Aktionspotentialausbreitung innerhalb einer Einzelzellschicht humaner ventrikulärer Kardiomyozyten entwickelt wurde. Ausgehend von bestehenden Einzelzellmodellen wurde ein räumlich und zeitlich hoch aufgelöstes Multizellmodell generiert und in der Programmiersprache Object Pascal implementiert. Nach Validierung des Modells wurde es zur gezielten, an experimentellen Daten orientierten Manipulation geometrischer Eigenschaften der Zellen (Länge, Durchmesser) und des Zellverbandes (Anordnung der Zellen untereinander) sowie der Gap-Junction-Verteilung genutzt. Die Analyse der elektrophysiologischen Effekte im Vergleich zur Kontrolle fand sowohl unter Normalbedingungen als auch unter Bedingungen, die pathologischen Veränderungen entsprechen (Entkopplung der Gap-Junctions, verringerte Aktivität des schnellen Natriumkanals, erhöhte Inhomogenität), statt. Es zeigte sich, dass ein größerer Zelldurchmesser bzw. erhöhte laterale Gap-Junction-Leitfähigkeit (Simulation von kardialer Hypertrophie bzw. Connexin- Lateralisierung) die Entstehungswahrscheinlichkeit eines unidirektionalen Leitungsblocks erhöhte. Die Erregungsausbreitungsgeschwindigkeit in hypertrophierten Zellen war zudem weniger stabil als in normalen Zellen. Beide Effekte gehören zu den Hauptursachen der Entstehung und Aufrechterhaltung ventrikulärer Arrhythmien. Die Ergebnisse der Arbeit erklären somit Ursachen des erhöhten Arrhythmierisikos in pathologisch veränderten und hypertrophierten Herzen und liefern eine theoretische Grundlage für zukünftige Studien.