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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.
31

Automatizované měření asynchronního motoru pomocí LabVIEW / Automatic measurement of induction machine using LabVIEW

Halfar, Lukáš January 2016 (has links)
The main purpose of the thesis Automatic measurement of induction machine using LabVIEW was to develope an automated measuring system, which is used to perform tests of induction motors. The algorithm of the system is programmed in LabVIEW. In the practical part of this thesis, a measurement of the motor Atas Elektromotory Náchod a.s. T22VT512 is carried out, in order to verificate functions of the algorithm, and to perform tests of the motor to analyse losses. Another part of the work is dedicated to the electromagnetic calculation of the motor T22VT512. For this purpose, two softwares with different principles of calculation have been used. Firstly, the calculation is solved by an analytical based software called RMxprt. Secondly, the software Maxwell 2D is used to make the calculation of electric and magnetic fields by the finite element method.
32

Identifikation und Quantifizierung korrelativer Zusammenhänge zwischen elektrischer sowie klimatischer Umgebung und Elektroenergiequalität

Domagk, Max 19 October 2015 (has links)
Eine angemessene Qualität der Elektroenergie ist Grundvoraussetzung für den störungsfreien Betrieb aller angeschlossenen Geräte und Anlagen und spielt in den Verteilungsnetzen moderner Industriegesellschaften wie Deutschland eine zentrale Rolle. Die Elektroenergiequalität (EEQ) wird in Strom- und Spannungsqualität unterteilt. Während die Stromqualität maßgeblich im Verantwortungsbereich der Hersteller von Geräten und Anlagen liegt, sind für die Sicherung einer angemessenen Spannungsqualität im Wesentlichen die Netzbetreiber verantwortlich. Durch die technische Weiterentwicklung bspw. neuer Gerätetechnologien und die zunehmende Integration dezentraler Erzeugungsanlagen wie Photovoltaikanlagen ist zu erwarten, dass die EEQ auch künftig weiter an Bedeutung gewinnt. Die EEQ im Niederspannungsverteilungsnetz ist abhängig von Ort und Zeit und wird durch verschiedene Qualitätskenngrößen beschrieben. Die örtliche und zeitliche Abhängigkeit resultieren aus einer Vielzahl verschiedener Einflussfaktoren, welche sich entweder der elektrischen oder der nicht-elektrischen Umgebung des betrachteten Verteilungsnetzes zuordnen lassen. Die elektrische Umgebung wird durch die Art und Anzahl angeschlossener Verbraucher bzw. Erzeuger (Abnehmer- bzw. Erzeugerstruktur) sowie Struktur und technische Parameter des Verteilungsnetzes (Netzstruktur) bestimmt. Die nicht-elektrische Umgebung umfasst u.a. Einflüsse der klimatischen Umgebung wie bspw. Temperatur oder Globalstrahlung. Ziel dieser Arbeit ist die systematische Identifikation korrelativer Zusammenhänge zwischen den genannten Umgebungseinflüssen und der EEQ sowie deren Quantifizierung auf Basis geeigneter Indizes und Kenngrößen. Die Ergebnisse der Arbeit helfen grundlegende Prinzipien der Ausprägung der Elektroenergiequalität im öffentlichen Verteilungsnetz besser zu verstehen sowie die Verteilungsnetze im Hinblick auf die Elektroenergiequalität zu charakterisieren und zu klassifizieren. Analog zu den Standard-Lastprofilen erfolgt die Definition von Standard-Qualitätsprofilen. / Power quality levels in public low voltage grids are influenced by many factors which can either be assigned to the electrical environment (connected consumers, connected genera-tion, network characteristics) or to the non-electrical environment (e.g. climatic conditions) at the measurement site. Type and amount of connected consumers (consumer topology) are expected to have a very high impact on power quality (PQ) levels. The generation topology is characterized by number and kind of equipment and generating installations like photovoltaic systems which are connected to the LV grid. The electrical parameters of the grid define the network topology. The parameters which are most suitable to describe each of the three topologies and the climatic environment will be identified. Voltage and current quality in public low voltage (LV) grids vary depending on location and time. They are quantified by a set of different parameters which either belong to events (e.g. dips) or to variations (e.g. harmonics). This thesis exclusively addresses continuous parameters describing variations. Continuous phenomena like harmonics are closely linked to an one-day-cycle which implies a more or less periodic behavior of the continuous power quality parameters. Consumer topologies such as office buildings or residential areas differ in their use of equipment. Time series analysis is used to distinguish between different consumer topologies and to identify characteristic weeks. The clustering of one-day time series is applied to identify characteristic days within the weeks of certain topologies. Based on the results, emission profiles for certain current quality parameters of different consumer topologies will be defined. Due to the characteristic harmonic current emission of certain consumer topologies which represents the typical user behaviour a classification system is developed. It is used to automatically classify the emission profiles of harmonic currents for unknown measurements and to estimate a likely consumer topology. A classification measure is introduced in order to identify unusual or false classified emission profiles. The usage behaviour of equipment by customers usually varies over the year. Subsequently, the levels of PQ parameters like harmonics may show seasonal variations which are identified by using newly defined parameters. The introduction of new device technologies on a large scale like the transition from incandescent to LED lamps might result in long-term changes to the levels of PQ parameters (e.g. harmonics). The analysis of the long-term behavior (trend) will be applied in order to quantify global trends (looking on the measurement duration as a whole) and local trends (looking on individual segments of the whole time series).
33

Alla vill varandras väl : Hur ledarskap genom medarbetarskap i en kvalitetskultur skaparpatientnöjdhet vid svenska sjukhus

Franzén Ähdel, Carina, Bulukin Wilén, Frida January 2019 (has links)
Engagerat ledarskap är grunden till att skapa en god kvalitetskultur och för attlyckas krävs medarbetarskapets delaktighet. Forskare menar att stödet förnärvarande ledare i vården har fram tills idag varit tämligen outvecklat. Syftetmed denna studie var att förstå framgångsfaktorer för hur kvalitetskulturen isvensk sjukvård kan kopplas mot ledarnas möjlighet att främja ett gottmedarbetarskap. Detta utifrån en förklarande sekventiell mixad metod med tvåkvantitativa mätningar som slutligen resulterade i en kvalitativ intervju. Enmätning av kvalitetskulturen vid svenska sjukhus utfördes utifrån ett tidigareframtaget mätinstrument för att mäta kvalitetskultur. Mätinstrumentetpresenterades genom 13 beteendepar som främjar respektive hindrar enkvalitetskultur. Denna mätning visade att det idag råder en generellt godkvalitetskultur vid svenska sjukhus. Genom denna mätning kunde enregressionsanalys utföras som kopplades samman mot sjukhusens resultat iNationell patientenkät. Ett statistiskt signifikant beteende kunde uppmätassom enligt denna mätning skapar nöjdare patienter ju mer medarbetarnaupplever att detta beteende förekommer i deras organisation. Beteendet ärnär vi har ett problem tar vi reda på grundorsaken innan vi beslutar om enlösning. Detta beteende togs med till två framgångsrika sjukhus för att djupareförstå hur dessa arbetar med medarbetarskapet i just detta beteende. Utifrånworkshop med dessa två sjukhus är slutsatsen att ledare behöver ha erfaritden kvalitetskultur och det medarbetarskap de ska bära för att främja ettmedarbetarskap som kopplats samman med kvalitetskulturen. I jakten på attnå framgång är en stark kvalitetskultur eftersträvansvärd men utifrånworkshoparna ser författarna ingen möjlig snabb lösning för att nå dit.Resultatet visar att dagens ledare i vården behöver stöd i form av mentor ellerreflektion kring ledarskap själv eller i grupp för att utvecklas. I konstruktiv andaär det med förbättringskunskap i grunden som allas delaktighet i arbetet medständiga förbättringar bedrivs. Detta kräver allas reflektion, ärlighet, mod,öppenhet och förtroende där allt grundar sig i att alla vill varandras väl! / Committed leadership is the foundation for creating a good quality culture andto succeed, the participation of employees is required. Researchers argue thatsupport for the current leaders in healthcare has until now been ratherundeveloped. The purpose of this study was to understand how the qualityculture in Swedish healthcare can be linked to the leaders' ability to promotegood co-workership. This study was based on an explanatory sequentialmixed method with two quantitative measurements that ultimately resulted in aqualitative interview. A measurement of the quality culture at Swedishhospitals was taken based on a previously developed instrument formeasuring quality culture . The measuring instrument comprises 13behavioral pairs that promote or hinder a quality culture. This measure showsthat there is generally a good quality culture at Swedish hospitals at present.Through this measurement, a regression analysis was done which links to thehospital's results in the National Patient Survey. A statistically significantbehavior was observed, and according to this measurement, is likely to createmore satisfied patients as more professions feel that this behavior occurs intheir organization. The behaviour in question can be described as: when wehave a problem, we find out the root cause before we decide on a solution.This behavior was brought into two successful hospitals in order to understandmore deeply how they work with the co-workership in this particular behavior.Based on the workshop with these two hospitals, we conclude that leadersneed to have experienced the quality culture and the co-workership they areassumed to carry in order to promote an employee culture that is linked to thequality culture. In pursuit of success, a strong quality culture is desirable, butbased on the workshops, the authors see no possible quick solution to reachit. The result shows that today's leaders in healthcare need support in the formof a mentor or time for reflection on leadership on their own or in groups inorder to develop. In constructive approach, it is with improvement knowledgethat everyone's involvement in the work of continuous improvement isconducted. This requires reflection, honesty, courage, openness and trustfrom everyone involved and intentions rooted in the wellness and prosperity ofall. / <p>2019-06-27</p>
34

Kořeny moravské urbanistické struktury / Roots of Moravian Urban Structure

Mohelník, Ladislav Unknown Date (has links)
The thesis has been written on the basis of main architectural concepts and their application in real life within a historical context investigation. Main architectural concepts are represented in a harmony of architectural composition that deals with relations among form, structure and space in the unique art work. Genius loci play very important role in the architectural creation - it represents a special and extra-ordinary urban locality and its architectural value in the historical, geographical and cultural context. The origin of Ostravice village within the historical frame concept of Moravia domain is the topic of this thesis. Other historical documents gave information about Bruneswerde as the Brno Castle. That means Brno Castle had to be founded not in Brno (as it has been consid-ered for many years) but it was located in Beskydy at Ostravice. The sacred city – Civitas Dei had been located in Bruneswerde region in early ages as the centre of European culture, education and spiritual life. Civitas Dei – divine Jerusalem in the transcription of St. Augustine's book De civitate Dei – is not only glorification of God and religious fantasy. It is also one of significant clues for recognition of historical architecture. The depiction of unknown settlement from the book of unde-fined origin is a superb testimony about extinct architectural works. They are legible from cadastral maps. Brno Castle - residence of nobility and power served shelter to St. Vojtěch, St. Prokop, St. Václav and St. Ludmila as it is obvious for the mentioned picture. Three major temples, three com-position axes symbolized by three towers on coins are in analogical relation to Brno triangle of four saints - the Saint family of Brno temples. Powerful ambitions of Brno City principals and clergy are inscribed into the urban structure in the way of composition relations which are legible to them who devoted themselves to the mystery of harmony. The absence of historical continuity affects personal attitudes and also identity of the whole community. The architecture truly reflects the past state of polis and it is eloquent even after its death. The architectural composition relations influence the natural environment for long time, longer than the architectural work existence. The geometric order of Renaissance Brno existence has not been in attention of architects so far. The features were discovered in characteristic paintings by Albrecht Durer. They are evidently secret works of the genius. A meaningful collaborator and follower in the extensive project was also his friend Jan Čert from Brno and lately from Vienna. His noble genealogy played a significant role in history of Silesia and Moravia for centuries. It is tendency to consider him as Austrian or even German architect. It is because of the fact that the genealogy tree of his noble family had roots in Moravia. It is supposed that Durer with Jan Čert´s support created the extraordinarily monumental architectural and urban works in Brno. A remarkable consensus in the urban composition of two squares and transition of traditional urban structure of Ostravice Civitas Dei into the modern Brno is also confirmed due to the identification of noble creators and owners, who were at the foundation, transformation and extinction of elements of the Moravian urban structure.

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