Rozprawy doktorskie: „UPI SYSTEM”

1

Norman, Agnes, i Carl Lundin. "Tillgänglighet för alla : Kommundemografis inverkan på användarinvolvering vid utveckling av offentliga webbtjänster". Thesis, Uppsala universitet, Institutionen för informatik och media, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-433811.

Pełny tekst źródła

Streszczenie:

This thesis explores if there is a connection between municipal demographics and how often the municipality involves users with disability in the development of its online services. The thesis derives its theory from previous studies on user involvement and participation (UPI), e-government development and county bureaucracy. The method is quantitative, with data gathering through surveys aimed at municipality representatives as well as downloaded from Statistiska Centralbyrån. The analysis consists of statistical methods and tests of analysis using the software SPSS. The result is analyzed by being compared to previous studies to find explanations for any existing relationships. The thesis has found some correlation between the size of a county’s population and its user involvement, when developing public digital services. The thesis has also found some correlation between a county’s population size and how often they involve users with disability. Furthermore, the thesis has found some correlation between the mean of age of a county’s population and how often they involve users with disability. The study also shows a lack of awareness of the importance of user involvement. One explanation for the findings could be the bureaucracy that controls the municipal finances.
Uppsatsen undersöker om det finns ett samband mellan kommundemografi och hur ofta kommunerna involverar användare med funktionsnedsättning i utvecklingen av sina webbtjänster. Uppsatsen utgår ifrån tidigare forskning på användarinvolvering och utveckling av offentliga tjänster samt tar avstamp i principer och lagrum för kommunalt styre. Tillvägagångssättet är kvantitativt, med datainsamling genom enkätstudie riktad till kommunrepresentanter vilket kompletteras med demografisk data hämtat från Statistiska Centralbyrån. Analys baseras på statistiska analysmetoder och tester utförda i SPSS, varpå resultaten analyseras utifrån tidigare forskning för att finna förklaring till olika samband. Uppsatsens resultat påvisar viss korrelation mellan kommunal populationsstorlek och generell användarinvolvering i kommunens utveckling av digitala offentliga tjänster. Resultatet påvisar även viss korrelation mellan kommuners populationsstorlek och användarinvolvering av individer med funktionsnedsättning. Ytterligare ett samband som påvisas är korrelation mellan genomsnittlig ålder i en kommunpopulation och kommunens användarinvolvering av individer med funktionsnedsättning. Författarna har även funnit en viss okunskap för behovet av användarinvolvering och att den rådande finansieringsprincipen som gäller i Sverige kan vara ett par av förklaringarna bakom de identifierade sambanden.

Style APA, Harvard, Vancouver, ISO itp.

2

Hájek, Josef. "Správa UPS zdrojů s využitím technologie GSM". Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2009. http://www.nusl.cz/ntk/nusl-236645.

Pełny tekst źródła

Streszczenie:

Theme of the Master's thesis is issue of backup power units and its attributes. There is also complete proposal of UPS power unit which can be used to control and monitor backup batteries. Power supply is fully controlled via Ethernet interface using TCI/IP protocol. The other chapter describes complete development of TCI/IP GSM unit which can be used for communication interface between GSM and Ethernet protocol. UPS and GSM modules are developed in details. The Master.s thesis includes all needed information for HW unit development and also for controlling software as well. Universal solution of the modules allows number possibilities of further development.

Style APA, Harvard, Vancouver, ISO itp.

3

Junuzovski, Edib, i Jari Yli-Hukka. "UPS-system i SÄS Byggnad 7". Thesis, Högskolan i Borås, Institutionen Ingenjörshögskolan, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-19222.

Pełny tekst źródła

Streszczenie:

Syftet med detta examensarbete var att beräkna vad det kostar att ha UPS-kraft (Uninterruptible Power Supply). Arbetet utfördes för Västfastigheter på Södra Älvsborgs Sjukhus (SÄS) i Borås. Studien utfördes på en UPS i drift i byggnad 7. UPS: en i denna byggnad har 10 kVA kapacitet och är av dubbelkonverterande typ. Batterier av Ni-Cd (Nickel-Kadmium) typ används till backup med UPS: en. UPS av dubbelkonverterande typ är känd för att skapa mycket övertoner, men är fördelaktig för dess skyddande förmåga mot spänningsspikar.Mätningar har gjorts för att beräkna kostnadsberäkningarna. Ytterligare hjälp har fåtts i form av räkningar och UPS-leverantörer (Ups-teknik och Eurotech AB).
Uppsatsnivå: C

Style APA, Harvard, Vancouver, ISO itp.

4

Van, Papendorp J. F. "Digital control of line-interactive UPS". Thesis, Stellenbosch : University of Stellenbosch, 2011. http://hdl.handle.net/10019.1/6537.

Pełny tekst źródła

Streszczenie:

Thesis (MScEng (Electrical and Electronic Engineering))--University of Stellenbosch, 2011.
ENGLISH ABSTRACT: The digital control of UPS systems has been difficult in the past due to a lack of DSP technology. It was for this reason not possible to establishing the necessary control to regulate the voltages and currents of the UPS systems. Recent advances in DSP technology have however provided the means of establishing central control of the UPS system as well as incorporating more complex closed-loop control algorithms by utilising a single floating-point DSP. Closed-loop control strategies are investigated and the central control of a line-interactive UPS is established in this study. Both the status of the physical system as well as various system parameters are controlled. The system both regulates and charges the storage batteries when the main utility supply is maintained. In the event that the utility fails, the converter instantaneously changes power flow towards the load with the aim of maintaining an uninterrupted voltage supply. Several closed-loop deadbeat based control strategies are investigated for the regulation of the inductor current. A solution for the regulation of the DC-link is also developed and implemented. Furthermore, an intensive study is done on the regulation of the voltage supplied to the load in the event that the utility supply fails. The investigation is initially approached by considering classical control theory. Although these control strategies provided sufficient results, a predictive strategy that is based on the physical conditions of the switching converter is finally investigated to establish closed loop control of the output voltage. This resulted in a high-bandwidth voltage controller capable of maintaining control under a wide-array of load conditions.
AFRIKAANSE OPSOMMING: Die digitale beheer van UPS stelsels was moeilik in the verlede as gevolg van 'n gebrek aan DSP tegnologie. Dit was vir hierdie rede nie moontlik om beheer te kon bewerkstelling ten einde die spannings and strome in the UPS stelsels te kon reguleer nie. Onlangse vordering in DSP tegnologie het egter dit moontlik gemaak om sentrale beheer van die UPS stelsel te bewerkstellig sowel as om meer komplekse geslote lus beheer algoritmes te inkorporeer met behulp van 'n enkele DSP. Geslote lus beheer strategiëe word ondersoek en die sentrale beheer van die line-interaktiewe UPS word bewerkstellig in hierdie studie. Beide die huidige toestand van die fisiese stelsel sowel as die verskeie parameters word beheer. Die stelsel beide laai en reguleer die batterye terwyl die hooftoevoer onderhou word. In die geval dat die hooftoevoer faal, word die omsetter se rigting van drywingsvloei verander om die las te voorsien van 'n ononderbroke spannings toevoer. Verskeie geslote-lus “deadbeat” beheer strategiëe word ondersoek vir die regulasie van die induktor stroom. 'n Oplossing vir die regulasie van die GS-koppervlak word ook ontwikkel en geïmplementeer. Verder word 'n intensiewe studie gedoen op regulasie van die spanning wat aan die las gevoer word in die geval dat die hooftoevoer faal. Hierdie ondersoek word aanvanklik benader deur klassieke beheer teorie te bestudeer. Alhoewel hierdie beheer strategiëe voldoene resultate gebied het, was 'n voorspel beheerstrategie gebaseer op die fisiese toestand van die omsetter finaal ondersoek. Die resultaat is 'n hoë-bandwydte spannings beheerder wat daartoe instaat is om beheer te handhaaf onder 'n verskeidenheid van lastoestande.

Style APA, Harvard, Vancouver, ISO itp.

5

Venkatagiri, Chellappan Mirunalini. "Fuel cell based battery-less ups system". Texas A&M University, 2008. http://hdl.handle.net/1969.1/86026.

Pełny tekst źródła

Streszczenie:

With the increased usage of electrical equipment for various applications, the demand for quality power apart from continuous power availability has increased and hence requires the development of appropriate power conditioning system. A major factor during development of these systems is the requirement that they remain environment-friendly. This cannot be realized using the conventional systems as they use batteries and/or engine generators. Among various viable technologies, fuel cells have emerged as one of the most promising sources for both portable and stationary applications. In this thesis, a new battery less UPS system configuration powered by fuel cell is discussed. The proposed topology utilizes a standard offline UPS module and the battery is replaced by a supercapacitor. The system operation is such that the supercapacitor bank is sized to support startup and load transients and steady state power is supplied by the fuel cell. Further, the fuel cell runs continuously to supply 10% power in steady state. In case of power outage, it is shown that the startup time for fuel cell is reduced and the supercapacitor bank supplies power till the fuel cell ramps up from supplying 10% load to 100% load. A detailed design example is presented for a 200W/350VA 1- phase UPS system to meet the requirements of a critical load. The equivalent circuit and hence the terminal behavior of the fuel cell and the supercapacitor are considered in the analysis and design of the system for a stable operation over a wide range. The steady state and transient state analysis were used for stability verification. Hence, from the tests such as step load changes and response time measurements, the non-linear model of supercapacitor was verified. Temperature rise and fuel consumption data were measured and the advantages of having a hybrid source (supercapacitor in parallel with fuel cell) over just a standalone fuel cell source were shown. Finally, the transfer times for the proposed UPS system and the battery based UPS system were measured and were found to be satisfactory. Overall, the proposed system was found to satisfy the required performance specifications.

Style APA, Harvard, Vancouver, ISO itp.

6

Chronaki, Kallia. "Exploiting asymmetric multi-core systems with flexible system software". Doctoral thesis, Universitat Politècnica de Catalunya, 2018. http://hdl.handle.net/10803/664032.

Pełny tekst źródła

Streszczenie:

Asymmetric multi-cores (AMCs) are a successful architectural solution for both mobile devices and supercomputers. These architectures combine different types of processing cores designed at different performance and power optimization points, thus exposing a performance-power trade-off. By maintaining two types of cores, AMCs are able to provide high performance under the facility power budget. However, there are significant challenges when using AMCs such as scheduling and load balancing. This thesis initially explores the potential of AMCs when executing current HPC applications and searches for the most appropriate execution model. Specifically we evaluate several execution models on an Arm big.LITTLE AMC using the PARSEC benchmark suite that includes representative HPC applications. We compare schedulers at the user, OS and runtime system levels, using both static and dynamic options and multiple configurations, and assess the impact of these options on the well-known problem of balancing the load across AMCs. Our results demonstrate that scheduling is more effective when it takes place in the runtime system as it improves the user-level scheduling by 23%, while the heterogeneous-aware OS scheduling solution improves the user-level scheduling by 10%. Following this outcome, this thesis focuses on increasing performance of AMC systems by improving scheduling in the runtime system level. Scheduling in the runtime system level is provided by the use of task-based parallel programming models. These programming models offer programming flexibility as they consist of an interface and a runtime system to manage the underlying resources and threads. In this thesis we improve scheduling with task-based programming models by providing three novel task schedulers for AMCs. These dynamic scheduling policies reduce total execution time either by detecting the longest or the critical path of the dynamic task dependency graph of the application. They use dynamic scheduling and information discoverable during execution, fact that makes them implementable and functional without the need of off-line profiling. In our evaluation we compare these scheduling approaches with an existing state-of the art heterogeneous scheduler and we track their improvement over a FIFO baseline scheduler. We show that the heterogeneous schedulers improve the baseline by up to 1.45x on a real 8-core AMC and up to 2.1x on a simulated 32-core AMC. Another enhancement we provide in task-based programming models is the adaptability to fine grained parallelism. The increasing number of cores on modern CMPs is pushing research towards the use of fine grained workloads, which is an important challenge for task-based programming models. Our study makes the observation that task creation becomes a bottleneck when executing fine grained workloads with task-based programming models. As the number of cores increases, the time spent generating tasks is becoming more critical to the entire execution. To overcome this issue, we propose TaskGenX. TaskGenX minimizes task creation overheads and relies both on the runtime system and a dedicated hardware. On the runtime system side, TaskGenX decouples the task creation from the other runtime activities. It then transfers this part of the runtime to a specialized hardware. From our evaluation using 11 HPC workloads on both symmetric and AMC systems, we obtain performance improvements up to 15x, averaging to 3.1x over the baseline. Finally, this thesis presents a showcase for a real-time CPU scheduler with the goal to increase the frames per second (FPS) of the game-play on mobile devices with AMC systems. We design and implement the RTS scheduler in the Android framework. RTS provides an efficient scheduling policy that takes into account the current temperature of the system to perform task migration. RTS solution increases the median FPS of the baseline mechanisms by up to 7.5% and at the same time it maintains temperature stable.
Los procesadores multinúcleos asimétricos (AMC) son una solución arquitectónica exitosa para dispositivos móviles y supercomputadores. Estas arquitecturas combinan diferentes tipos de núcleos de procesamiento diseñados con diferentes propiedades de rendimiento y potencia. Al mantener dos o más tipos de núcleos, los AMCs pueden proporcionar un alto rendimiento con un consumo bajo de energía de las infraestructuras. Sin embargo, existen importantes desafíos al usar los AMC, como la programación y el equilibrio de carga. Esta tesis explora inicialmente el potencial de los AMC al ejecutar aplicaciones actuales de Computacion de Alto Rendimiento (HPC) y busca el modelo de ejecución más apropiado para ellas. Específicamente evaluamos varios modelos de ejecución en un procesador asimétrico Arm big.LITTLE utilizando las aplicaciones PARSEC que son aplicaciones representativas de HPC. En este trabajo se compara la programación en los niveles de usuario, sistema operativo y librería y evaluamos el impacto de estas opciones en el conocido problema de equilibrar la carga entre los AMCs. Nuestros resultados demuestran que la programación es más efectiva cuando se lleva a cabo en el nivel del runtime, ya que mejora la programación del nivel de usuario en un 23%, mientras que la solución de programación del sistema operativo heterogéneo mejora la programación del nivel de usuario en un 10%. Siguiendo este resultado, esta tesis se centra en aumentar el rendimiento de los sistemas AMC mejorando la programación al nivel de librería. La programación en este nivel se proporciona mediante el uso de Modelos de Programación Paralelos Basados en Tareas (MPBT). Estos modelos de programación ofrecen flexibilidad de programación, ya que consisten en una interfaz y un runtime para administrar los recursos e hilos subyacentes. En esta tesis, mejoramos la programación con MPBT al proporcionar tres nuevos planificadores de tareas para AMCs. Estos planificadores dinámicos reducen el tiempo total de ejecución ya sea detectando la camino más largo o el camino crítico del grafo de dependencia de tareas de la aplicación, que es generado dinámicamente. En nuestra evaluación, comparamos estos planificadores con un planificador heterogéneo existente y demonstramos su mejora sobre un planificador FIFO. Mostramos que los planificadores heterogéneos mejoran el planificador FIFO en hasta 1.45x en un AMC real de 8 núcleos y hasta 2.1x en un AMC simulado de 32 núcleos. Otra contribución en los MPBT es la adaptabilidad al paralelismo de grano fino. El creciente número de núcleos en los chip multinúcleos modernos está empujando la investigación hacia el uso de cargas de trabajo de grano fino, que es un desafío importante para los MPBT. Nuestro estudio observa que la creación de tareas bloquea la ejecución con cargas de trabajo de grano fino con MPBT. Cuando el número de núcleos aumenta, el tiempo empleado en generar tareas pasa a ser más crítico para toda la ejecución. Nuestra solución es TaskGenX, que minimiza los costes de creación de tareas y se basa en una extensión del runtime y en un hardware dedicado. En el runtime, TaskGenX desacopla la creación de tareas de las otras actividades del runtime, ejecutando esta actividad en un hardware especializado. Evaluamos 11 aplicaciones de HPC con TaskGenX en sistemas simétricos y AMC y obtenemos mejoras de rendimiento de hasta 15x, con un promedio de 3.1x sobre la implementación de referencia. Finalmente, esta tesis presenta un planificador de CPU con el objetivo de aumentar los fotogramas por segundo (FPS) para juegos en dispositivos móviles con sistemas AMC. Diseñamos e implementamos el planificador de Real-Time Scheduler (RTS) en Android. El RTS proporciona una política de programación eficiente que tiene en cuenta la temperatura actual del sistema para realizar la migración de tareas. La solución RTS aumenta la FPS mediana de los mecanismos de referencia

Style APA, Harvard, Vancouver, ISO itp.

7

Sánchez, Verdejo Rommel. "HPC memory systems: Implications of system simulation and checkpointing". Doctoral thesis, Universitat Politècnica de Catalunya, 2022. http://hdl.handle.net/10803/673620.

Pełny tekst źródła

Streszczenie:

The memory system is a significant contributor for most of the current challenges in computer architecture: application performance bottlenecks and operational costs in large data-centers as HPC supercomputers. With the advent of emerging memory technologies, the exploration for novel designs on the memory hierarchy for HPC systems is an open invitation for computer architecture researchers to improve and optimize current designs and deployments. System simulation is the preferred approach to perform architectural explorations due to the low cost to prototype hardware systems, acceptable performance estimates, and accurate energy consumption predictions. Despite the broad presence and extensive usage of system simulators, their validation is not standardized; either because the main purpose of the simulator is not meant to mimic real hardware, or because the design assumptions are too narrow on a particular computer architecture topic. This thesis provides the first steps for a systematic methodology to validate system simulators when compared to real systems. We unveil real-machine´s micro-architectural parameters through a set of specially crafted micro-benchmarks. The unveiled parameters are used to upgrade the simulation infrastructure in order to obtain higher accuracy in the simulation domain. To evaluate the accuracy on the simulation domain, we propose the retirement factor, an extension to a well-known application´s performance methodology. Our proposal provides a new metric to measure the impact simulator´s parameter-tuning when looking for the most accurate configuration. We further present the delay queue, a modification to the memory controller that imposes a configurable delay for all memory transactions that reach the main memory devices; evaluated using the retirement factor, the delay queue allows us to identify the sources of deviations between the simulator infrastructure and the real system. Memory accesses directly affect application performance, both in the real-world machine as well as in the simulation accuracy. From single-read access to a unique memory location up to simultaneous read/write operations to a single or multiple memory locations, HPC applications memory usage differs from workload to workload. A property that allows to glimpse on the application´s memory usage is the workload´s memory footprint. In this work, we found a link between HPC workload´s memory footprint and simulation performance. Actual trends on HPC data-center memory deployments and current HPC application’s memory footprint led us to envision an opportunity for emerging memory technologies to include them as part of the reliability support on HPC systems. Emerging memory technologies such as 3D-stacked DRAM are getting deployed in current HPC systems but in limited quantities in comparison with standard DRAM storage making them suitable to use for low memory footprint HPC applications. We exploit and evaluate this characteristic enabling a Checkpoint-Restart library to support a heterogeneous memory system deployed with an emerging memory technology. Our implementation imposes negligible overhead while offering a simple interface to allocate, manage, and migrate data sets between heterogeneous memory systems. Moreover, we showed that the usage of an emerging memory technology it is not a direct solution to performance bottlenecks; correct data placement and crafted code implementation are critical when comes to obtain the best computing performance. Overall, this thesis provides a technique for validating main memory system simulators when integrated in a simulation infrastructure and compared to real systems. In addition, we explored a link between the workload´s memory footprint and simulation performance on current HPC workloads. Finally, we enabled low memory footprint HPC applications with resilience support while transparently profiting from the usage of emerging memory deployments.
El sistema de memoria es el mayor contribuidor de los desafíos actuales en el campo de la arquitectura de ordenadores como lo son los cuellos de botella en el rendimiento de las aplicaciones, así como los costos operativos en los grandes centros de datos. Con la llegada de tecnologías emergentes de memoria, existe una invitación para que los investigadores mejoren y optimicen las implementaciones actuales con novedosos diseños en la jerarquía de memoria. La simulación de los ordenadores es el enfoque preferido para realizar exploraciones de arquitectura debido al bajo costo que representan frente a la realización de prototipos físicos, arrojando estimaciones de rendimiento aceptables con predicciones precisas. A pesar del amplio uso de simuladores de ordenadores, su validación no está estandarizada ya sea porque el propósito principal del simulador no es imitar al sistema real o porque las suposiciones de diseño son demasiado específicas. Esta tesis proporciona los primeros pasos hacia una metodología sistemática para validar simuladores de ordenadores cuando son comparados con sistemas reales. Primero se descubren los parámetros de microarquitectura en la máquina real a través de un conjunto de micro-pruebas diseñadas para actualizar la infraestructura de simulación con el fin de mejorar la precisión en el dominio de la simulación. Para evaluar la precisión de la simulación, proponemos "el factor de retiro", una extensión a una conocida herramienta para medir el rendimiento de las aplicaciones, pero enfocada al impacto del ajuste de parámetros en el simulador. Además, presentamos "la cola de retardo", una modificación virtual al controlador de memoria que agrega un retraso configurable a todas las transacciones de memoria que alcanzan la memoria principal. Usando el factor de retiro, la cola de retraso nos permite identificar el origen de las desviaciones entre la infraestructura del simulador y el sistema real. Todos los accesos de memoria afectan directamente el rendimiento de la aplicación. Desde el acceso de lectura a una única localidad memoria hasta operaciones simultáneas de lectura/escritura a una o varias localidades de memoria, una propiedad que permite reflejar el uso de memoria de la aplicación es su "huella de memoria". En esta tesis encontramos un vínculo entre la huella de memoria de las aplicaciones de alto desempeño y su rendimiento en simulación. Las tecnologías de memoria emergentes se están implementando en sistemas de alto desempeño en cantidades limitadas en comparación con la memoria principal haciéndolas adecuadas para su uso en aplicaciones con baja huella de memoria. En este trabajo, habilitamos y evaluamos el uso de un sistema de memoria heterogéneo basado en un sistema emergente de memoria. Nuestra implementación agrega una carga despreciable al mismo tiempo que ofrece una interfaz simple para ubicar, administrar y migrar datos entre sistemas de memoria heterogéneos. Además, demostramos que el uso de una tecnología de memoria emergente no es una solución directa a los cuellos de botella en el desempeño. La implementación es fundamental a la hora de obtener el mejor rendimiento ya sea ubicando correctamente los datos, o bien diseñando código especializado. En general, esta tesis proporciona una técnica para validar los simuladores respecto al sistema de memoria principal cuando se integra en una infraestructura de simulación y se compara con sistemas reales. Además, exploramos un vínculo entre la huella de memoria de la carga de trabajo y el rendimiento de la simulación en cargas de trabajo de aplicaciones de alto desempeño. Finalmente, habilitamos aplicaciones de alto desempeño con soporte de resiliencia mientras que se benefician de manera transparente con el uso de un sistema de memoria emergente.
Arquitectura de Computadors

Style APA, Harvard, Vancouver, ISO itp.

8

Bengtsson, Tobias, i Håkan Hult. "Combining Solar Energy and UPS Systems". Thesis, KTH, Tillämpad termodynamik och kylteknik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-148042.

Pełny tekst źródła

Streszczenie:

Solar Power and Uninterruptible Power Supply (UPS) are two technologies that are growing rapidly. The demand for solar energy is mainly driven by the trend towards cheaper solar cells, making it economically profitable for a larger range of applications. However, solar power has yet to reach grid parity in many geographical areas, which makes ways to reduce the cost of solar power systems important. This thesis investigates the possibility and potential economic synergies of combining solar power with UPS systems, which have been previously researched only from a purely technical point of view. This thesis instead evaluates the hypothesis that a combined solar and UPS system might save additional costs compared to regular grid-tied systems, even in a stable power grid. The primary reason is that on-line UPS systems rectifies and inverts all electricity, which means that solar energy can be delivered to the DC part of the UPS system instead of an AC grid, avoiding the installation of additional inverters in the solar power system. The study is divided into three parts. The first part is a computer simulation using MATLAB, which has an explorative method and aims to simulate a combined system before experimenting physically with it. The second part consists of experiments on a physical prototype system based on basic UPS and solar power components. The third part is an economical assessment of investment costs and energy balances, comparing two separate systems (UPS and solar power separate) to one combined (UPS & solar power). The results from the prototype system show that adding solar power to an UPS system does not interfere with the UPS functionality in any major way, however for optimal performance some additional integration may be necessary. On the contrary, the additional power terminal that the solar panels constitute, can increase system performance during certain operational conditions. The result of the economic analysis shows that a combined system has potential for both a lower investment cost due to cheaper components and increased energy savings through lower conversion losses. The conclusion from the study is that a combined solar energy and UPS system is technically feasible. Furthermore, a combined system has clear economic advantages over two separate systems. This means that a combined system might be economically profitable even in situations where a separate system is not.
Solenergi och avbrottsfri kraftförsörjning (UPS) är två tekniker som växer snabbt. Efterfrågan på solenergi ökar huvudsakligen på grund av den snabba utvecklingen mot billigare solceller, vilket lett till att solenergi blivit lönsamt i en större mängd applikationer. I många områden är solenergi dock fortfarande inte kostnadsmässigt konkurrenskraftigt jämfört med traditionella energikällor, vilket gör en fortsatt sänkning av kostnaderna för solenergi till en viktig fråga för solenergiindustrin. Detta examensarbete har som syfte att undersöka om det är tekniskt möjligt att kombinera solenergi med UPS-system samt potentialen för ekonomiska synergier med denna kombination. Tidigare forskning inom området har endast undersökt denna kombination från en rent teknisk synvinkel. Detta examensarbete driver istället hypotesen att ett kombinerat solenergi- och UPS-system kan leda till större kostnadsbesparingar jämfört med ett traditionellt nätanslutet solenergisystem, även i ett stabilt elnät som i Sverige. En on-line UPS skyddar en känslig last genom att kontinuerligt likrikta och sedan åter växelrikta inkommande ström för att därmed både isolera lasten från nätet samt höja strömkvalitén. I UPS-systemet finns därmed en likströmsdel dit solpanelerna direkt kan kopplas istället för att skicka den genererade solenergin ut på elnätet. Därmed undviks inköp och installation av sol-växelriktare i solenergisystemet. Studien är uppdelad i tre delar. Första delen är en datorsimulering i MATLAB och syftar till att explorativt undersöka det kombinerade systemet för en optimerad design innan fysiska experiment utförs. Den andra delen av studien utgörs av experiment på ett fysiskt prototypsystem baserat på ett principiellt UPS- och solenergisystem. Den tredje delen av studien är en ekonomisk analys av både investeringskostnader och energibalanser som jämför ett kombinerat system (UPS & sol) med två separata system (UPS & sol separat). Resultaten från prototypsystemet visar att påkopplandet av solceller i en principiell UPS har mycket låg påverkan på UPS-systemets funktionalitet, samt att solcellerna som en extra energikälla under vissa driftförhållanden kan ha en positiv påverkan på UPS-systemet. För optimal prestanda kan dock en viss integration av systemen krävas. Resultatet från den ekonomiska analysen visar att ett kombinerat system har potential att sänka investeringskostnaden genom billigare komponenter. Ett kombinerat system kan även leda till en högre energibesparing jämfört med ett nätanslutet solenergisystem eftersom konverteringsförlusterna i UPS-systemet sjunker i det kombinerade systemet. Slutsatsen av studierna är att ett kombinerat solenergi- och UPS-system är tekniskt möjligt. Dessutom finns betydande ekonomiska synergier med ett kombinerat system. Detta innebär att ett kombinerat system kan vara lönsamt även i fall där ett separat solelsystem inte är det.

Style APA, Harvard, Vancouver, ISO itp.

9

Diaz, Damaris, i Margaretha Johansson. "Energibesparingspotential i UPS-system : Byggnad 13 i SÄS". Thesis, Högskolan i Borås, Institutionen Ingenjörshögskolan, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-19433.

Pełny tekst źródła

Streszczenie:

Arbetet utfördes för Västfastigheter på Södra Älvsborgs Sjukhus i Borås. Studiengenomfördes i byggnad 13 där dagens UPS-aggregat börjar bli överbelastat. UPS:en i dennabyggnad har 120kVA kapacitet och försörjer med avbrottsfri kraft övriga avdelningar.Studien gjordes på följande avdelningar: Röntgenklinik, MAVA, KAVA, HIA, Dialys,Medicinavdelning 4, Dagkirurgi, Hudmottagning och AVC (Akutvårdcentral). Syftet meddetta examensarbete är att hitta orsakerna till att befintligt UPS-system är överbelastat ochvilka åtgärder som kan vidtas för att komma till rätta med problemet. Metoden har varit attgöra en grundlig inventering av lokalernas utformning samt en analys av personalenskunskaper i korrekt anslutning av el-förbrukande apparater.Resultatet visar att personalens kunskaper i hur man prioriterar rätt anslutning av elförbrukandeapparater är bristfällig, samt att förutsättningarna för att alltid kunna göra enkorrekt anslutning ibland saknas p.g.a. att korrekt vägguttag inte är åtkomlig.

Style APA, Harvard, Vancouver, ISO itp.

10

Mrázek, Petr. "Záložní zdroj (UPS)". Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2015. http://www.nusl.cz/ntk/nusl-221364.

Pełny tekst źródła

Streszczenie:

The thesis deals with Uninterruptible Power Supply (UPS) and associated problems of backup power in case of unexpected outages of electricity. Start of work is dedicated to limitation of the electricity supplies, as well as their causes and consequences. Furthermore, brief history of UPS and subsequently distinguish between UPS’s architectures. There is also a description of the energy sources such as batteries, flywheels or fuel cells. Part of thesis describes security of electricity supply in health care facilities, including requirements for emergency power. The own design of UPS is described in the end.

Style APA, Harvard, Vancouver, ISO itp.

11

Östbom, Lykke, i Sanna Börjeson. "Balance the Swedish Transmission System by Using Data Centers : A Study Whether UPS-systems Can Operate as Frequency Regulators". Thesis, Uppsala universitet, Institutionen för teknikvetenskaper, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-353249.

Pełny tekst źródła

Streszczenie:

The energy market is facing a switch-over where future energy systems will rely more on renewable energy sources. These intermittent energy sources will increase the demand for new regulation methods to maintain the power balance in the grid. The purpose of this report is to investigate the ability of data centers to balance the power supply and demand in the Swedish transmission system by using data centers’ UPS-systems. UPS (Uninterruptable Power Supply) systems are intended to ensure stable and reliable power at all times. The data centers are evaluated by calculating the capacity of the UPS-systems. Furthermore, the report examines the challenges and opportunities that concerned actors will come across if this new regulation method is implemented. The incentives regarding future financial revenues for data centers and business opportunities for manufacturers are also examined. Linear regression is chosen as the method of determining the capacity. The results show that the total aggregated capacity is 82.46 MW. The revenue that data centers would earn by operating as regulators is 143 000 SEK/MW per year if they regulate a quarter per hour. Furthermore, the results inspire to a discussion whether frequency regulation is suitable for data centers. To use UPS-systems for something other than their main purpose of ensuring stable power should be well motivated and be completely risk-free. The results show that it is uncertain whether the UPS-systems are able to provide the required power without risking complete discharge, which could lead to a financial disaster if a power failure occurs.

Style APA, Harvard, Vancouver, ISO itp.

12

Barson, Helen. "Studies on the cellular function of the uPA/uPAR system". Thesis, University of Aberdeen, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.419648.

Pełny tekst źródła

Streszczenie:

The uPA receptor, uPAR, is GPI-linked and therefore contains no transmembrane domains. Yet, uPA:uPAR binding can initiate cell signalling and may involve adaptor proteins, such as integrins. Various responses to uPA binding have been described, but the exact mechanisms remain undefined. To identify potential downstream changes caused by uPA binding, MCF7 cells were treated ± uPA or ATF (the uPAR-binding part of uPA) for various times. Gene expression was studied using custom cDNA microarrays, containing genes relating to a range of cellular processes. Changes in expression were normalised to 0 min and buffer-only controls, and genes with a fold change less than 2.5-fold were discounted. Gene expression changes that were observed in two or more treatments were shortlisted, from which thirteen were selected fro verification by real-time RT-PCR. These experiments were done on cDNA from a further cell treatment with uPA. The results did not reflect those of the microarrays; no changes in expression were observed. The microarray data were then analysed in a different, more stringent, way, but not target genes were identified. This study identified no clear candidate genes but gene expression after uPA:uPAR binding remains an important question. uPAR is present in lipid rafts and these may allow its association with signalling molecules. This study investigated whether potential uPAR adaptor proteins, α_v or β₁ integrins, moved into rafts when cells bound uPA. Mouse cells transfected with human uPAR were treated ±uPA, and lipid rafts were extracted from the cells. uPAR was readily detectable in lipid rafts under al conditions, but the integrins were not found to associate with lipid rafts even after uPA treatment.

Style APA, Harvard, Vancouver, ISO itp.

13

Rahmat, Mohd Khairil. "Methods for reliability analysis of uninterruptible power supply (UPS) system". Thesis, University of Strathclyde, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.444418.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

14

Damasceno, Andreia Goreti Marques. "Mapping UPR elements in male reproductive system: a bioinformatics approach". Master's thesis, Universidade de Aveiro, 2017. http://hdl.handle.net/10773/22006.

Pełny tekst źródła

Streszczenie:

Mestrado em Biomedicina Molecular
A Unfolded Protein Response (UPR) é um mecanismo de defesa crucial que protege as células contra o enrolamento incorreto de proteínas, através da ativação de três sensores principais: ATF6, PERK e IRE1. Cada sensor guia a célula em diferentes mecanismos de transdução de sinal culminando na produção de fatores de transcrição que, por sua vez, regulam genes que aumentam a capacidade da célula corrigir a conformação de proteínas mal enoveladas, impedindo, em último caso, a sua agregação. Nos últimos anos a UPR tem sido associada a várias patologias. Na infertilidade masculina, poucos estudos se têm focado na influência dos componentes da UPR, sendo importante numa primeira abordagem, a identificação destes componentes no sistema reprodutor masculino. Através de pesquisa de bases de dados e com abordagens bioinformáticas, com o objetivo de identificar potenciais candidatos associados a fenótipos de infertilidade, foi realizada uma recolha de proteínas UPR no testículo, espermatozoide e plasma seminal. De forma a determinar possíveis alvos envolvidos na infertilidade masculina, as interações proteínaproteína foram analisadas, destacando-se 6 proteínas com elevado grau de interação: HSP90AA1, HSPA5, SEC61A1, VCP, PERK e ATF4. Considerando ainda a sua importância funcional, as proteínas efetoras da via PERK, a GADD34 e a eIF2 foram destacadas para estudos de deteção experimentais. Neste sentido, foi confirmada pela primeira vez a presença das proteínas PERK e GADD34 em espermatozoides humanos. Estes resultados constituem o primeiro passo fundamental para avançar para estudos mais aprofundados relativamente à expressão e níveis de atividade destes candidatos, procurando perceber a contribuição dos mesmos na via de sinalização UPR e a sua eventual desregulação na infertilidade masculina.
The unfolded protein response (UPR) is an essential cell defense response against defects in protein folding and it is mainly triggered by the activation of ATF6, PERK and IRE1. Each sensor leads to different signal transduction mechanisms through the production of transcription factors that, in turn, regulate genes that increase the cell's ability to correct conformation of poorly folded proteins, ultimately hindering their aggregation. The past years shed light on the role of the UPR in several diseases. Regarding male infertility, few studies have focused on the implications of UPR components, hence the need to a prior approach concerning the presence of these components on the male reproductive system. Through a database search and using bioinformatics approaches, with the aim of identifying potential candidates associated with infertility phenotypes, a collection of UPR proteins in the testis, spermatozoa and seminal plasma was performed. To determine potential targets to scrutinize possible involvement in male infertility, a protein-protein interaction network analysis was performed, depicting 6 key proteins highly interconnected: HSP90AA1, HSPA5, SEC61A1, VCP, PERK and ATF4. Considering their functional value, the effector proteins of the PERK pathway, GADD34 and eIF2 were highlighted for experimental studies. Thus, the presence of the PERK and GADD34 were confirmed for the first time in human spermatozoa. These results constitute the first fundamental step towards further studies on the expression and activity levels of these candidates and understand their contribution to the UPR signaling pathway and their possible deregulation in male infertility

Style APA, Harvard, Vancouver, ISO itp.

15

Tondini, Matteo. "Ubi maior, ibi ius: assessing justice system reform in Afghanistan". Thesis, IMT Alti Studi Lucca, 2008. http://e-theses.imtlucca.it/73/1/Tondini_phdthesis.pdf.

Pełny tekst źródła

Streszczenie:

This study analyses the reform of justice in Afghanistan which started in the wake of the US-led military intervention of 2001. In particular, it focuses on the role of international actors and their interaction with local stakeholders. The research addresses a number of issues, relating to the way justice system reform is practically carried out in Afghanistan. It also highlights some provisional results, together with problems and dilemmas encountered in the reform activities. The main objective of this study is to evaluate whether the success of justice system reform in Afghanistan may be linked to any specific reason, feature or approach. The research has been conducted under a twofold approach, comprising both theoretical and practical phases. The former phase has included the analysis of the relevant literature on the topic, drawing particular attention on several specific issues of interest (e.g. the development cooperation policies currently applied at international level, the ‘local ownership’ principle, the justice system in place in Afghanistan, etc.). This theoretical phase has been enriched by a period of study at the Department of Peace Studies of the University of Bradford (UK), and by the organization of the Conference on the Rule of Law in Afghanistan in July 2007. On the other hand, the practical phase has been characterized by a ‘learning by doing’ methodology, the author having served as a consultant to the Italian Development Cooperation Office in Kabul (Dec. 2007 – May 2008), working within the ‘Italian Justice Programme’. This research confirms that justice system reform in Afghanistan may succeed only if development programmes are implemented through a real multilateral approach, involving domestic authorities and other relevant local stakeholders. Success is therefore linked to: limiting the political interests of donors (which should abandon the idea of gaining ‘political dividends’ from their assistance); establishing pooled financing mechanisms for the sector reform; restricting the use of bilateral projects; improving the efficacy of technical and financial aid; and concentrating the attention on the ‘demand for justice’ at local level rather than on the traditional supply of financial and technical assistance.

Style APA, Harvard, Vancouver, ISO itp.

16

Tempe, Marcus. "Caveat Lector : Läsaren må se upp!" Thesis, University of Skövde, Department of Computer Science, 2001. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-545.

Pełny tekst źródła

Streszczenie:

Internet är ett globalt nätverk som förser en användare med ofantliga mängder information. Internet ger även användaren den unika möjligheten att själv publicera sin information utan någon form av kontroll. Den möjligheten har gjort att mycket missvisande och falsk information finns tillgänglig på Internet. Det är helt upp till användaren att försöka avgöra om informationen är sann, giltig och korrekt, det vill säga trovärdig, frågan är bara om användaren gör det?

Följande examensarbete har undersökt om en erfaren Internetanvändare utför någon form av källkritisk granskning, eller överhuvudtaget funderar över trovärdigheten hos information från webben. För att besvara ovanstående fråga har en enkätundersökning genomförts på olika datastudenter som studerar vid Högskolan i Skövde.

Slutsatserna från enkätundersökningen var att studenterna tänker ofta på om information från webben är trovärdig. De utför även stundtals någon form av källkritisk granskning på informationen. Dock ansåg många att de hade bristande kunskaper att utvärdera trovärdigheten hos informationen från webben.

Style APA, Harvard, Vancouver, ISO itp.

17

Brodsky, Daniel Owen. "Investigation of correlated electron systems under uni-axial strain". Thesis, University of St Andrews, 2015. http://hdl.handle.net/10023/9622.

Pełny tekst źródła

Streszczenie:

A central paradigm for classifying the phases of correlated electron systems is their symmetry. Having the ability to controllably tune symmetry-related properties of the system is therefore a powerful probe. In this thesis experiments on quasi-two-dimensional metals Sr₃Ru₂O₇ and Sr₂RuO₄ are reported, where uni-axial strain was used as a means of lifting the native tetragonal symmetry. Uni-axial strain was applied to the samples using a piezo-electric based device which can apply both positive and negative strains to the sample, to study the symmetry of the response about zero strain. Sr₃Ru₂O₇ exhibits a magnetic-field-tuned quantum critical point, in the vicinity of which a novel phase is stabilized. The transport properties of the phase were previously shown to be highly susceptible to in-plane magnetic fields. We show that resistivity inside the phase responds strongly to strain applied along one of the in-plane crystal axes, with the responses parallel and perpendicular to that of the applied strain mirroring each other about zero strain. Our results suggest that the underlying symmetry of the phase is C₄ rather than C₂ symmetric. Sr₂RuO₄ is an unconventional superconductor which was predicted to have an order parameter of the form pₓ ± ip[sub]y. This should result in a splitting of the transitions of the two components as a function of strain, with a cusp in T[sub]c versus strain at zero strain, where T[sub]c is the upper of the two transitions. We find that the response of T[sub]c to strain along [100] is large and symmetric about zero strain, whilst the response to [110] strain is weak and mostly anti-symmetric. No cusp is observed for either strain direction. We argue that although our results are in contradiction with the simplest pₓ ± ip[sub]y models, they may still be consistent with certain scenarios where the cusp would have been too small to be observed.

Style APA, Harvard, Vancouver, ISO itp.

18

Müller, Dirk. "Schedulability Tests for Real-Time Uni- and Multiprocessor Systems". Doctoral thesis, Universitätsbibliothek Chemnitz, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-137767.

Pełny tekst źródła

Streszczenie:

This work makes significant contributions in the field of sufficient schedulability tests for rate-monotonic scheduling (RMS) and their application to partitioned RMS. Goal is the maximization of possible utilization in worst or average case under a given number of processors. This scenario is more realistic than the dual case of minimizing the number of necessary processors for a given task set since the hardware is normally fixed. Sufficient schedulability tests are useful for quick estimates of task set schedulability in automatic system-synthesis tools and in online scheduling where exact schedulability tests are too slow. Especially, the approach of Accelerated Simply Periodic Task Sets (ASPTSs) and the concept of circular period similarity are cornerstones of improvements in the success ratio of such schedulability tests. To the best of the author's knowledge, this is the first application of circular statistics in real-time scheduling. Finally, the thesis discusses the use of sharp total utilization thresholds for partitioned EDF. A constant-time admission control is enabled with a controlled residual risk
Diese Arbeit liefert entscheidende Beiträge im Bereich der hinreichenden Planbarkeitstests für ratenmonotones Scheduling (RMS) und deren Anwendung auf partitioniertes RMS. Ziel ist die Maximierung der möglichen Last im Worst Case und im Average Case bei einer gegebenen Zahl von Prozessoren. Dieses Szenario ist realistischer als der duale Fall der Minimierung der Anzahl der notwendigen Prozessoren für eine gegebene Taskmenge, da die Hardware normalerweise fixiert ist. Hinreichende Planbarkeitstests sind für schnelle Schätzungen der Planbarkeit von Taskmengen in automatischen Werkzeugen zur Systemsynthese und im Online-Scheduling sinnvoll, wo exakte Einplanungstests zu langsam sind. Insbesondere der Ansatz der beschleunigten einfach-periodischen Taskmengen und das Konzept der zirkulären Periodenähnlichkeit sind Eckpfeiler für Verbesserungen in der Erfolgsrate solcher Einplanungstests. Nach bestem Wissen ist das die erste Anwendung zirkulärer Statistik im Echtzeit-Scheduling. Schließlich diskutiert die Arbeit plötzliche Phasenübergänge der Gesamtlast für partitioniertes EDF. Eine Zugangskontrolle konstanter Zeitkomplexität mit einem kontrollierten Restrisiko wird ermöglicht

Style APA, Harvard, Vancouver, ISO itp.

19

Ybanez, Sergio D. "Growth strategies : how software start-ups can leverage alliances, acquisitions, IPOs and venture capital". Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/42374.

Pełny tekst źródła

Streszczenie:

Thesis (S.M.)--Massachusetts Institute of Technology, System Design and Management Program, 2007.
Includes bibliographical references (leaves 144-148).
The identification of the different factors impacting a software start-up company's decision to pursue an alliance, acquisition, IPO or venture capital to sustain growth is the main objective of this research study. First and foremost on a software start-up company's list of reasons to pursue and engage in alliances is to leverage the incumbent's tangible and intangible assets. Other factors impacting their decision to leverage alliances include the opportunity to enhance stability and profitability and the opportunity to acquire key customers. Another key factor that encourages start-up company alliance or strategic partnership formation is the need for the start-up company to establish platform leadership. Like the pursuit of alliances, foremost on a software start-up company's list of reasons to pursue and engage in acquisitions is to leverage the incumbent's or the acquirer's tangible and intangible assets. Other factors impacting their decision to get acquired include the boost such an acquisition will provide in helping them establish platform leadership. Acquisitions are also pursued by start-up companies when the founders want to exit. Start-up companies also pursue to get acquired to survive, when no other option are available. Lastly, they would opt to get acquired to penetrate new markets. Given optimal economic conditions, IPOs capture the best liquidity and valuation. It is advantageous versus getting acquired in that one gets to sustain growth while retaining control of the software start-up company. Software start-up companies seek venture capital funding for a number of factors. This includes getting help in business development, leveraging the VC network, obtaining a certification effect, diversifying net worth and reducing risk, and pursuing and engaging in alliances successfully.
(cont.) There is no one universal paradigm to help a software start-up company determine when it is best to pursue an alliance, an acquisition, an IPO or venture capital. A myriad of factors specific to one's situation impacts the decision to choose the right growth strategy. To make the most informed decision, the executive team must consider all these factors.
by Sergio D. Ybanez.
S.M.

Style APA, Harvard, Vancouver, ISO itp.

20

Cai, Lingxiao, i Ying Jia. "Transportation management system in China : a study case on UPS and JULC". Thesis, Högskolan i Gävle, Avdelningen för Industriell utveckling, IT och Samhällsbyggnad, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-12323.

Pełny tekst źródła

Streszczenie:

Due to the fast changing environment of China’s logistics market and high participative level of foreign logistics enterprises, Chinese logistics players mostly suffer from their low service ability of Third Party Logistics. Big gaps certainly exist between domestic ones and foreign giants. The thesis aims to compare the TMS of a local logistics company and a large multinational company. Investigating how TMS is applied in China’s logistics market and making comparison of TMS between a multinational company and a Chinese local company is the main contribution of the paper. After conducting cases study and interview on a foreign multinational logistics enterprise United Parcel Service and a Chinese local small logistics Jiangsu Universal Logistics Company, this paper has a relatively high reliability and validity. Relevant knowledge of TMS, mode and carriers, and 3PL is selected to present in the theoretical framework. In the thesis body, we compared two chosen companies from three logistical levels: strategic, tactical, and operational. In detail, we found a vast of differences lying in nine parts that we selected from the TMS reference functional model and domains. Considering the characteristics and future challenges of China logistics market, we strongly recommend JULC to adapt TMS. However, it is unfeasible for JULC to apply the entire TMS. Therefore, we provide the solutions in three perspectives. First and foremost, apply part of TMS in the relevant field, in terms of network design and capacity management. An equally important solution is adapting cost-saving solution in certain administrative field, namely: planning, vehicle, execution, finance. Last but not least, in order to provide the company more opportunities, a few general approaches will be presented. After a closer examine of the consequences when the integrated solutions got applied, we surely drew the conclusion that 3PL performance of domestics companies will get enhanced in the near future.

Style APA, Harvard, Vancouver, ISO itp.

21

Claesson, Peter. "Application Service Provider, lever modellen upp till förväntningarna?" Thesis, University of Skövde, Department of Computer Science, 2001. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-520.

Pełny tekst źródła

Streszczenie:

Allt sedan datorer började användas som en resurs i företag har mindre företag sett de höga kostnaderna dessa fört med sig. I slutet av 1990-talet skapas en modell som möjliggör att hyra program från en Application Service Provider, ASP. Med ASP-modellen följer ett flertal förväntningar och fördelar om vad modellen kan tillföra i framförallt mindre företag. De ska till exempel till lägre kostnader få tillgång till program som kan öka deras konkurrensförmåga. Denna rapports fråga är om modellen lever upp till dessa förväntningar hos kunderna.

Vid intervjuer som genomfördes med fem olika företag framkom bland annat att ASP-modellen kan möjliggöra ett minskat behov av egen IT-personal och att internt kunna ge användarsupport. ASP-leverantören tar istället över denna roll. ASP-modellen kan också hjälpa till att öka ett företags konkurrenskraft gentemot andra företag och sett ur ett helhetsperspektiv sänka företagets kostnader. Användningen av ASP-tjänster anses i flera fall ha levt upp till förväntningarna.

Style APA, Harvard, Vancouver, ISO itp.

22

Jacobsson, Erik. "Dimensionering av UPS-system och generatorer för reservkraftsystem på sjukhus och flygplatser". Thesis, Karlstads universitet, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-69399.

Pełny tekst źródła

Streszczenie:

Sjukhus och flygplatser är precis som resten av samhället, beroende av el. Med dagens teknik är sjukhus och flygplatser högteknologiska ochväldigt störningskänsliga för elbortfall,vilket gör det viktigt att ha en stabil och säker kraftförsörjning utan avbrott. Ett avbrott i strömförsörjningen kan orsaka allvarliga,till och med livsfarliga konsekvenser. Att säkerställa ett bra och redundant reservkraftsystemär väsentligt för sjukhusen och flygplatserna. Syftet med studien var att undersöka samt ta fram reservkraftsystem med redundansförsjukhus och flygplatser. Under arbetets gång har litteraturstudie om generatorer och UPS-system (uninterruptible power supply) gjorts samt intervjuer med experter inom båda ämnena. Resultat visar de fundamentala delarna som är viktiga att ta hänsyn till vid dimensionering av reservkraftsystem. Men det visar också på att det finns många faktorersom spelar in vid dimensionering av systemen, vilket leder till att alla system ser olika ut och det finns inte riktigtnågon specifik mall att följa.
Hospitals and airports are just like the rest of society, dependent onelectricity. With today's technology, hospitals and airports are highly technological and highly sensitiveto electricity loss. Thatmakes it important to have stable and secure power supply without interruptions. An interruption of power supply can cause serious even fatal consequences. Ensuring a good and redundant reserve power system is essential for hospitals and airports. The purpose of the study was to investigate and provide good redundant solutions for reserve systems in hospitals and airports. During the course of the thesis, literature studies ofgenerators and UPS (uninterruptible power supply) systems have been conducted as well as interviews with experts in both subjects.Results show the fundamental aspects that should be taken into account when dimensioning reserve power systems. But it also shows that there are many aspects that affectthe system dimensioning, which means that all systems look different and there is no specific template to follow.

Style APA, Harvard, Vancouver, ISO itp.

23

Mikati, Samir Omar. "Integrated method to create optimal dynamic strategic plans for corporate technology start-ups". Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/53220.

Pełny tekst źródła

Streszczenie:

Thesis (S.M.)--Massachusetts Institute of Technology, Engineering Systems Division, 2009.
"June 2009." Cataloged from PDF version of thesis.
Includes bibliographical references (p. 133-139).
This thesis presents an innovative method for evaluating and dynamically planning the development of uncertain technology investments. Its crux centers on a paradigm shift in the way managers assess investments, toward an approach that incorporates uncertainty in the beginning phases of planning instead of first choosing a plan and then considering the effect of risk. By proactively identifying critical uncertainties and "purchasing" flexibility to handle them, management can increase the value of the start-up technology. The method builds on extensive literature in corporate venture capital (CVC), opportunity identification, and opportunity development, to present a new integrated approach that: 1. Explicitly identifies the synergies between an investing company and an opportunity, and articulates the new value network created through a Technology-Implement-Commercialization (TIC) linkage framework. 2. Develops the opportunities articulated in the TIC networks using a tool that identifies current and goal positions for a set of critical issues, and states the critical uncertainties. 3. Combines the outcomes of the TIC and opportunity development steps in a decision analysis of the possible development paths. The result is a recommended dynamic strategy that invests initially in some form of flexibility to enable program directors to avoid paths that eventually appear unproductive, while seizing opportunities that develop along the course of the project. The thesis demonstrates the approach by applying it to a start-up project in solar concentrators, done from the perspective of a corporate sponsor.
(cont.) The purpose of this case study is to provide a comprehensive guide to the process used in the new method. While extensive effort was dedicated to creating a representative and reasonably accurate assessment, the analysis and numbers are neither authoritative nor exhaustive. The goal, indeed a major contribution of the thesis, is to provide a teaching tool to aid future use of the innovative planning and valuation method.
by Samir Omar Mikati.
S.M.

Style APA, Harvard, Vancouver, ISO itp.

24

Rymarski, Zbigniew. "Jednofazowe i trójfazowe inwertery napięcia stosowane w systemach UPS". Praca habilitacyjna, Wydawnictwo Politechniki Śląskiej, 2010. https://delibra.bg.polsl.pl/dlibra/docmetadata?showContent=true&id=633.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

25

Scherwin, Hugo. "How does growth affect innovation and control systems in start-ups?" Thesis, KTH, Maskinkonstruktion (Inst.), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-230722.

Pełny tekst źródła

Streszczenie:

Det här examensarbetet är en studie av 7 svenska företag som har bedömts som att de är i en tillväxtfas som tar dem från att vara ett start-up till ett moget bolag. Studien fokuserar på hur tillväxten påverkar företagens innovationsarbete och deras användning av styrsystem. Syftet med studien var att empiriskt utforska denna terräng vidare med hjälp av ett antal forskningsfrågor som ledning.Data för studien inhämtades genom 17 intervjuer och har resulterat i 7 för studien typiska företags-case av tillväxtbolag, 2 atypiska case av en riskkapitalfond och ett nystartsbolag, samt en teoretisk analys av de 7 företags-casen. Analysen gjordes först av de separata företagen och sedan av alla företagen tillsammans. Analysen av alla företagen gjordes med teman tagna från forskningsfrågorna och de är Ambidexteritet, Organisationskontroller samt Antagning av styrsystem.Analysen fann att alla case-företag förlitade sig på informella styrsystem oavsett av hur många formella kontroller de hade antagit. Det här kan dock vara på grund av att de flesta företagen i studien fortfarande var i processen att anta nya formella styrsystem. Studien visade också att alla företagen kände spänningar i valet mellan arbete som nyttjande och vidareutvecklade nuvarande resurser och arbete som utforskande nya möjligheter. De flesta av företagen valde att fokusera på en av dessa till nackdel för den andra på grund av en upplevd brist på resurser för att arbeta med båda. På grund av att de flesta företagen fortfarande var i processen att ta in fler styrmedel kunde inget klart mönster ses i hur styrsystemen påverkade företagens innovationsarbete.
This thesis is a study of 7 companies in Sweden that are considered to be entering or undergoing the growth phase transition from birth companies to mature companies and it focuses on how their transition affect their innovation work and their use of management controls. The purpose of the study was to empirically explore this terrain further using a number of research questions as guidelines.The data for this study was collected through 17 interviews and has resulted in 7 growth-company case studies, two atypical cases of a venture fund and a birth company as well as a theoretical analysis of the 7 company cases. The analysis was made both on each company separately as well as on all companies jointly. The joint analysis was made on the themes of the research questions and are Ambidexterity, Organizational control and Adoption of management control systemsThe analysis found that all case companies were highly reliant on informal controls regardless of their adoption of structural controls but this could be due to the fact that most companies still were in the process of adopting formal controls. It also showed that most companies felt tensions in choosing between exploitative and explorative work and that many chose to focus on one at the potential cost of the other because of a lack of resources to focus on both. Because the process of systems adoptions was mostly still ongoing, no clear indication could be found in how the control systems affected the companies’ innovation work.

Style APA, Harvard, Vancouver, ISO itp.

26

Lundell, Tobias, i Magnus Forzelius. "Developing a Framework for Management Control Systems in Start-ups : How Management Control Systems can be used in fast-growing technology start-ups to support controlled growth". Thesis, Linköpings universitet, Industriell ekonomi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-138149.

Pełny tekst źródła

Streszczenie:

The purpose of this study was to find what appropriate Management Control Systems exist that can help fast-growing start-ups to achieve a controlled and healthy growth. We also studied how the control systems can be used together, and balanced between each other. To find appropriate control systems, we conducted a literature review of important factors for implementing management control, that ended with a tentative framework of control systems. After that, we conducted a multiple case study including several fast-growing technology start-ups to see how they use the collection of control systems in our tentative control framework, and analyzed what effect they have on the organization’s activities and how they balance between them. After the case study, a cross-case analysis was conducted were differences and similarities between the cases were analyzed and related to the theoretical concepts from the literature review. This led to conclusions regarding how start-ups tend to use and balance the control systems, which in turn led to the finalized control framework for fast-growing start-ups. The framework provides a set of control systems that start-ups can use that are relevant for supporting growth and managing the most common challenges that fast-growing start-ups face. By using different levers of control, the control systems complement each other and create a dynamic tension, which increases performance. For start-ups that are in a product development phase, the balance of the control systems is mostly on growth and innovation, which supports exploration of opportunities. However, there is still a little focus on control and efficiency to keep the organization focused. For start-ups with an already developed and commercialized product, the balance of control systems is more towards the middle. The most focus is put on growth and efficiency, with a little less emphasis on innovation and control. This is a way to keep an even balance between exploration of opportunities and exploitation of current resources.

Style APA, Harvard, Vancouver, ISO itp.

27

Milad, Muftah A. "UPS system : how current and future technologies can improve energy efficiency in data centres". Thesis, Brunel University, 2017. http://bura.brunel.ac.uk/handle/2438/14664.

Pełny tekst źródła

Streszczenie:

A data centre can consist of a large group of networked servers and associated power distribution, networking, and cooling equipment, all that application consumes enormous amounts of energy as a small city, which are driving to a significant increase in energy inefficiency problems in data centre, and high operational costs. Also the massive amounts of computation power contained in these systems results in many interesting distributed systems and resource management problems. In recent years, research and technologies in electrical engineering and computer science have made fast progress in various fields. One of the most important fields is the energy consumption in data centre. In recent years the energy consumption of electronic devices in data centre, as reported by. Choa, Limb and Kimb, nearly 30000000 kWh of power in a year, may consume by a large data centre and cost its operator around £3,000,000 for electricity alone. Some of the UK sites consume more than this. In the UK data centre the total power required are amid 2-3TWh per year. Energy is the largest single component of operating costs for data centres, varying from 25-60%. Agreeing to many types of research, one of the largest losses and causes of data centre energy inefficiency power distribution is from the uninterruptible power supply (UPS). So a detailed study characterized the efficiencies of various types of UPSs under a variety of operating conditions, proposed an efficiency label for UPSs, also investigate challenges related to data centre efficiency, and how all new technologies can be used to simplify deployment, improve resource efficiency, and saving cost. Data centre energy consumption is an important and increasing concern for data centre managers and operators. Inefficient UPS systems can contribute to this concern with 15 percent or more of utility input going to electrical waste within the UPS itself. For that reason, maximizing energy efficiencies, and reduce the power consumption in a data centre has become an important issue in saving costs and reducing carbon footprint, and it is necessary to reduce the operational costs. This study attempts to answer the question of how can future UPS topology and technology improve the efficiency and reduce the cost of data centre. In order to study the impact of different UPS technologies and their operating efficiencies. A model for a medium size data centre is developed, and load schedules and worked diagrams were created to examine in detail and test the components of each of the UPS system topologies. The electrical infrastructure topology to be adopted is configured to ‘2N’ and ‘N+1’ redundancy configuration for each UPS systems technologies, where ‘N’ stands for the number of UPS modules that are required to supply power to data centre. This work done at RED engineering designs company. They are professionals for designing and construction of a new Tier III and Tier IV data centres. The aim of this work is to provide data centre managers with a clearer understanding of key factors and considerations involved in selecting the right UPS to meet present and future requirements.

Style APA, Harvard, Vancouver, ISO itp.

28

Sack, Uli [Verfasser]. "Numerical Simulation of Phase Separation in Binary and Multicomponent Systems / Uli Sack". Berlin : Freie Universität Berlin, 2014. http://d-nb.info/1059740389/34.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

29

Arendholz, Tanja [Verfasser]. "Bedeutung des uPA/uPAR-Systems für die Proliferation glatter Gefäßmuskelzellen / Tanja Arendholz". Gießen : Universitätsbibliothek, 2012. http://d-nb.info/1064024483/34.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

30

Siepe, Dirk. "Role of the peptidyl-prolyl cis/trans isomerase Pin1 in the ubiquitin proteasome system (UPS)". Diss., lmu, 2009. http://nbn-resolving.de/urn:nbn:de:bvb:19-116564.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

31

Elizondo, de la Garza David C. "Hidden Failures in Protection Systems and its Impact on Power System Wide-area Disturbances". Thesis, Virginia Tech, 2000. http://hdl.handle.net/10919/31890.

Pełny tekst źródła

Streszczenie:

This document explores Hidden Failures in protection systems, which have been identified as key contributors in the degradation of Power System wide-area disturbances. The Hidden Failure Modes in which the protection systems may fail to operate correctly and their consequences are identified in a theoretical approach. This theoretical side has its practical counterpart since a number of Hidden Failure Modes are found in real wide-area disturbances. The original definition of Hidden Failure, which is a failure that remains undetected and is uncovered by another system event, is included as well as developments on Hidden Failure sequence of events and a methodology for Hidden Failure identification. This method is based on Protection Element Functionality Defects (PEFD), which are applicable to all the elements included in the protective chain. PEFD are classified in two main groups. Primary and Back-up protection schemes applied for Generators, Buses, Transformers and Transmission Lines are analyzed. The abnormal Power System conditions that each Power System element may have are enumerated. A catalogue of the relays or relay systems, in charge of detecting and stopping the continuous presence of the abnormal conditions is developed. Relay families organize this catalogue. The relaying schemes for five Special Protection Systems are described. Thirty-three Hidden Failures Modes are included based on the relaying implementation for Primary protection, Back-up protection and Special Protection Systems. These Hidden Failures Modes are based on PEFD-A. Hidden Failures related to PEFD-B are included in a general fashion. Wide-area disturbances based on NERC reports are analyzed and Hidden Failures are identified employing the developed methodology. The mechanisms in the disturbances are summarized and are applicable to Primary protection, Back-up protection and Special Protection Systems. Regions of Vulnerability and Areas of Consequence definitions are included and are identified for a Power System wide-area disturbance. For some protection schemes the term Condition of Vulnerability was developed. Regions of Vulnerability and Areas of Consequence will bring the initial steps towards the problem solution. Further research directions are oriented towards the development of a computer-based tool to track the regions of vulnerability in real time.
Master of Science

Style APA, Harvard, Vancouver, ISO itp.

32

Müller, Dirk. "Schedulability Tests for Real-Time Uni- and Multiprocessor Systems: Focusing on Partitioned Approaches". Doctoral thesis, Der Andere Verlag, 2013. https://monarch.qucosa.de/id/qucosa%3A20022.

Pełny tekst źródła

Streszczenie:

This work makes significant contributions in the field of sufficient schedulability tests for rate-monotonic scheduling (RMS) and their application to partitioned RMS. Goal is the maximization of possible utilization in worst or average case under a given number of processors. This scenario is more realistic than the dual case of minimizing the number of necessary processors for a given task set since the hardware is normally fixed. Sufficient schedulability tests are useful for quick estimates of task set schedulability in automatic system-synthesis tools and in online scheduling where exact schedulability tests are too slow. Especially, the approach of Accelerated Simply Periodic Task Sets (ASPTSs) and the concept of circular period similarity are cornerstones of improvements in the success ratio of such schedulability tests. To the best of the author's knowledge, this is the first application of circular statistics in real-time scheduling. Finally, the thesis discusses the use of sharp total utilization thresholds for partitioned EDF. A constant-time admission control is enabled with a controlled residual risk.
Diese Arbeit liefert entscheidende Beiträge im Bereich der hinreichenden Planbarkeitstests für ratenmonotones Scheduling (RMS) und deren Anwendung auf partitioniertes RMS. Ziel ist die Maximierung der möglichen Last im Worst Case und im Average Case bei einer gegebenen Zahl von Prozessoren. Dieses Szenario ist realistischer als der duale Fall der Minimierung der Anzahl der notwendigen Prozessoren für eine gegebene Taskmenge, da die Hardware normalerweise fixiert ist. Hinreichende Planbarkeitstests sind für schnelle Schätzungen der Planbarkeit von Taskmengen in automatischen Werkzeugen zur Systemsynthese und im Online-Scheduling sinnvoll, wo exakte Einplanungstests zu langsam sind. Insbesondere der Ansatz der beschleunigten einfach-periodischen Taskmengen und das Konzept der zirkulären Periodenähnlichkeit sind Eckpfeiler für Verbesserungen in der Erfolgsrate solcher Einplanungstests. Nach bestem Wissen ist das die erste Anwendung zirkulärer Statistik im Echtzeit-Scheduling. Schließlich diskutiert die Arbeit plötzliche Phasenübergänge der Gesamtlast für partitioniertes EDF. Eine Zugangskontrolle konstanter Zeitkomplexität mit einem kontrollierten Restrisiko wird ermöglicht.

Style APA, Harvard, Vancouver, ISO itp.

33

Sundhage, Lif Lea Johanna. "Mellan stolarna, upp på väggarna : att få plats i en skola för alla". Thesis, Kungl. Musikhögskolan, Institutionen för musik, pedagogik och samhälle, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kmh:diva-2161.

Pełny tekst źródła

Streszczenie:

The purpose of this study was to investigate how well adjusted the support is for young people that have been diagnosed with ADHD, while attending the gymnasium. Analysis and result are based on a sociocultural perspective and have their take-off in literaturestudies and qualitative interviews with two students with the diagnosis and one special needs teacher. The interviews were based on themes that had their starting point in school policy documents and related literature. The interviews were semi-structured with the aim of letting the interviewees speak as freely as possible. One of the themes included the individual strategies developed by the interviewees, such as using mobile-apps to help structure and plan for everyday life. Results show that the available support is not well adapted and that how great impact the ADHD-diagnosis has on how well the person do in school is greatly affected by in what social context and what kind of support he or she has outside of school, for example by family. The study shows that there is great need for further research and development within the research area.
Syftet med den här studien var att undersöka hur väl anpassat stödet i gymnasieskolan är för elever med ADHD-diagnos. Analys och resultat är bearbetade utifrån ett sociokulturellt perspektiv och baseras på litteraturstudier och kvalitativa intervjuer med två gymnasieelever med ADHD-diagnos samt en specialpedagog/speciallärare. Intervjuerna berörde teman med utgångspunkt i styrdokumenten samt i relaterad litteratur och var halvstrukturerade, med syftet att låta intervjupersonerna tala så fritt som möjligt. Ett av temana berörde de egna strategier som intervjupersonerna utarbetat, så som att använda appar i mobilen för att skapa struktur och planera vardagen. Resultatet visar att stödet i gymnasieskolan inte är väl anpassat utan att hur väl en person med ADHD-diagnos klarar sig i skolan snarare beror på de omgivande förutsättningarna utanför skolan, exempelvis vilket stöd hen får från sin familj. Studien visar att det finns stor utvecklingspotential inom området och att det behövs ytterligare forskning på hur man kan omforma skolans sociokulturella struktur och se till att anpassningarna blir just anpassningar och inte ytterligare krav.

Style APA, Harvard, Vancouver, ISO itp.

34

Spieß, Jochen. "Die reifungsassozierte Genexpression der Krüppel-like-Transkriptionsfaktoren im Mononukleären Phagozyten-System". kostenfrei, 2008. http://www.opus-bayern.de/uni-regensburg/volltexte/2009/1214/.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

35

Ingold, Gert-Ludwig. "Anwendung von funktionalintegralen auf transport- und relaxationsphänomene in dissipativen quantensystemen /". kostenfrei, 1988. http://www.opus-bayern.de/uni-augsburg/volltexte/2007/646/.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

36

Buttiglione, V. "THE ROLE OF MIR-340 IN POST-TRANSCRIPTIONAL REGULATION OF THE UPA-SYSTEM IN BREAST CANCER". Doctoral thesis, Università degli Studi di Milano, 2016. http://hdl.handle.net/2434/365720.

Pełny tekst źródła

Streszczenie:

The urokinase-type plasminogen activator system (uPA-system), whose main components are the serine protease uPA (PLAU), the cell surface receptor uPAR (PLAUR) and the uPA inhibitor PAI-1 (SERPINE1), has been extensively studied for its involvement in cancer pathogenesis. Specifically, nowadays the components of the uPA-system are well-characterised determinants for the prognosis of breast cancer. The regulation of the gene expression of the uPA-system components is very complex and depends on a plethora of stimuli acting both at transcriptional and post-transcriptional level. The uPA-system components are often over expressed in breast cancer but the detailed molecular mechanisms regulating the expression are still to uncover. In an expression analysis conducted on a cohort of unselected breast cancer patients, we found that the expression of PLAU and PLAUR is highly correlated. Meta-analyses of published experimental data and in silico studies pointed out the possibility that PLAU, PLAUR and also SERPINE1 might be negatively regulated at post-transcriptional level by a microRNA, the miR-340. We experimentally validated the role of miR-340 as negative regulator of the expression of the three uPA-system components using MDA-MB-231, a triple negative breast cancer cell line. Microarray experiments, performed to characterise the global transcriptome changes induced by miR-340 in MDA-MB-231 cells, showed that miR-340 down regulates also the expression of desmoplastic reaction-related genes underlining a possible role of miR-340 in regulating tumour-associated genes. Notably, most of the identified miR-340 target genes were found indeed to be associated with poor clinical outcome in breast cancer. Functional studies carried out in MDA-MB-231 cells suggested that miR-340 might modulate cell proliferation, even if this effect was not confirmed in vivo. In order to better define the functional role of miR-340, we generated a miR-340 deficient mouse model, taken advantage of the zinc finger nuclease technology. Overall these data identify, for the first time, a single microRNA that is able to down regulate the expression of the three main components of the uPA-system together with desmoplastic reaction and breast cancer prognosis-related genes, thus representing a new potential player in the pathogenesis of breast cancer.

Style APA, Harvard, Vancouver, ISO itp.

37

Devadi, Anil Kumar Reddy. "Evaluating Cache Vulnerability to Transient Errors for The Uni-processor and Multi-processor Systems". Available to subscribers only, 2009. http://proquest.umi.com/pqdweb?did=1967969471&sid=4&Fmt=2&clientId=1509&RQT=309&VName=PQD.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

38

Even, Nadine. "On Hydrodynamic Limits and Conservation Laws". Doctoral thesis, kostenfrei, 2009. http://www.opus-bayern.de/uni-wuerzburg/volltexte/2009/3837/.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

39

Janse, van Rensburg Jan Jacobus. "Development of a flywheel energy storage system : uninterrupted power supply (FLY-UPS) / Jan Jacobus Janse van Rensburg". Thesis, North-West University, 2007. http://hdl.handle.net/10394/2322.

Pełny tekst źródła

Streszczenie:

The School of Electrical, Electronic and Computer Engineering is in the process of establishing an active magnetic bearing (AMB) and high speed permanent magnet synchronous machine (PMSM) laboratory. This is done to gain knowledge on AMB, flywheel and high speed PMSM technologies. Some of the advantages of using AMBs are: no mechanical wear or friction, no need for lubrication, active vibration control and unbalance compensation. This project’s purpose is the development of an AMB suspended flywheel energy storage system. This system should be able to store energy for a certain period with minimal losses. Energy stored should then be readily available for use by a load such as a personal computer. This system will be similar to a conventional uninterrupted power supply (UPS). Instead of using a lead-acid cell to store the energy, a flywheel is used. The acronym for the system is FLY-UPS (FLYwheel Uninterrupted Power Supply). Charging the system should not take longer than 5 minutes using 2000 W of power. One of the system’s main function is to protect sensitive equipment from mains power spikes and short power interruptions. This system should be able to supply 2000Wfor at least 3 minutes, allowing enough time to switch sensitive equipment off in a controlled manner. Two heteropolar radial AMBs, one axial AMB, a high speed permanent magnet synchronous machine (PMSM) for propulsion and generating purposes, and a disc that will serve as the flywheel is the main components of this system. This system should be operated at a rotational speed of 30000 rpm. Development of this system facilitates testing of control algorithms and establishes knowledge on AMBs and flywheels. An important outcome of this project is delivering a working FLY-UPS system. Future research on advanced control techniques, low loss AMB’s and flywheel design optimising is made possible with the development of the FLY-UPS system. An in depth investigation into rotor-dynamics and flywheels has been conducted. Research into flywheels is relevant because recently there has been a growing focus on renewable energy. A modular approach was used in the design of the FLY-UPS system. A rotor-dynamic analysis has been done on the rotor/flywheel assembly, resulting in predicted displacements and the critical frequencies of the rotor/flywheel assembly. Analytical and computer aided strength analysis has been done on the rotor/flywheel assembly. Both the analytical and computer aided strength analysis concludes that the rotor/flywheel achieves the minimum factor of safety of 1.5. Measured critical frequencies correlate to the predicted critical frequencies. Predicted displacement does not correlate to the measured displacement. This is attributed to insufficient balancing of the rotor/flywheel. Rotational speed of the rotor/flywheel is currently limited to 7000 rpm, in stead of the required 30000 rpm, due to the greater displacements. Further investigation into the reasons for the greater displacement is still required. A possible solution to this problem is re-balancing the rotor/flywheel assembly. Further research is required on the dynamic stiffness of the AMBs. A delevitation system needs to be developed. Research has to be done on the accurate prediction of the behaviour of a rotor during delevitation. An investigation into the development of a carbon-fibre composite flywheel needs to be conducted. Measured against the outcomes, the project has been a success.
Thesis (M.Ing. (Mechanical Engineering))--North-West University, Potchefstroom Campus, 2008.

Style APA, Harvard, Vancouver, ISO itp.

40

Haide, Uli Dirk [Verfasser]. "Die Verbesserung der rechtsventrikulären Funktion durch die Reparatur der Mitralklappeninsuffizienz mit dem MitraClip-System / Uli Dirk Haide". Ulm : Universität Ulm, 2020. http://d-nb.info/1223027651/34.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

41

Bea, Anders. "Automated Take-ups : The effects of replacing a manual operation for anautomated financial system within Clearing Services". Thesis, KTH, Industriell ekonomi och organisation (Inst.), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-188009.

Pełny tekst źródła

Streszczenie:

Within the banking industry many tasks, that previousrelied upon by manual labour is continuously being exchangedfor automated solutions. With the update in themethod of performing services through advanced software,benefits such as decrease in cost, increase in handling capacityor decrease in management delay come into focus.In the sector of Clearing Services the automation of simulatingrisk and clearing trades is being less of a questionand more of a requirement, since an increase in demand forderivatives clearing is expected. With this as a focus pointthis research project studied the potential effects that achange from manual to automation might present. To alsograsp a better understanding of the future market and competitivepotential the current situation on the market wasalso researched, where regulation proved itself as one ofthe motivating factors behind an increased activity. Thestudy concluded not only a decrease in cost, handling delayand increase in clearing capacity, but also future requirementfor implementation if any sustainable positionamongst market competition is to be expected. In additionthe resources that are relieved from the performing simulationsand take-ups would be able to focus on projects thatwould increase product value for the customer.
Inom bankindustrin overgår i dagsläget en stor andelprocesser från manuell hantering till att bli automatiserade.Genom uppdateringen till avancerad mjukvara, i relationtill hur tjänster hanteras och genomfors, så framkommerfordelar såsom exempelvis reduktioner i kostnader, processfordrojning,samt okad hanteringskapacitet. Automatiseringi sektorn Clearing Services är mer eller mindre ettkrav, då okad efterfråga utav clearing av derivat är forväntad.Med detta som fokus har denna studie undersoktpotentiella effekter som kan framkomma i en overgång frånmanuellt arbete till automatisering. For att bättre forståden framtida marknaden och den potentiella konkurrenskraften,undersokdes även den nuvarande marknaden. Meddetta identifierades även den motiverande faktorn bakomregulering och hur den påverkar det okande intresset gällandeclearing av derivat. Studien nådde fram till slutsatsenatt implementation skulle leda till reduktioner av kostnader,processfordrojning och okad hanteringskapacitet. Foratt behålla en kompetitiv position på marknaden for derivatclearing så kommer automatisering att krävas. Vidareskulle frilagda resurser från automatisering även kunna användasfor att utveckla produkter vilka okar kundvärdet.

Style APA, Harvard, Vancouver, ISO itp.

42

Hermansson, Johan, i Christian Svensson. "Det pedagogiska arbetet inom MSI : Utifrån Bolognaprocessen och UPC". Thesis, Växjö University, School of Mathematics and Systems Engineering, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:vxu:diva-746.

Pełny tekst źródła

Streszczenie:

The Pedagogical progression within MSI – Based upon The Bologna Process and UPC.

In a near future several of the European countries will begin working after new guidelines concerning a declaration called the Bologna process. Everything will be done one step at a time and the declaration will change the way the students are being graded, all this for the sake of making the European labour-market more

opened for all of its millions of students.

In Växjö this process is in the making, but to adapt to the future demands the school must also change its ways of teaching.

To increase its quality the University has put together a procedure of actions to improve the pedagogical working method in all its institutions. In this essay we would like to elucidate how the work with the Bologna process is proceeding within the institution of Mathematics and System Engineering and what

they do improve their pedagogical teaching. By doing a qualitative case study on the student at the Computer Science Program we wish to find the answers to our questions.

Det pedagogiska arbetet inom MSI – Utifrån Bolognaprocessen och UPC.

Inom en snar framtid kommer flertalet länder i Europa jobba efter nya riktlinjer enligt en deklaration kallad Bolognaprocessen. Det hela kommer att ske i etapper och innebär att sättet på vilket studenter bedöms kommer ändras, allt för att göra Europas arbetsmarknad öppnare för alla dess miljoner studerande.

I Växjö pågår detta arbete för fullt, men för att anpassa sig till framtida krav måste skolan även förändra sin utbildningsform. För att höja sin kvalité har universitetet tagit fram en handlingsplan för att förbättra de pedagogiska arbetsmetoderna i alla institutioner. I den här uppsatsen vill vi belysa hur arbetet med Bolognaprocessen fortgår inom Matematiska och systemtekniska institutionen och vad de gör för att förbättra den

pedagogiska undervisningen. Genom att göra en kvalitativ undersökning med Systemvetenskapliga programmets studenter försöker vi finna svaren på våra frågor.

Style APA, Harvard, Vancouver, ISO itp.

43

Vidal, Iglesias Berta. "The fibrinolitys system in muscle regeneration and dystrophy". Doctoral thesis, Universitat Pompeu Fabra, 2008. http://hdl.handle.net/10803/7143.

Pełny tekst źródła

Streszczenie:

Duchenne muscular dystrophy (DMD) is a fatal degenerative disorder of locomotor and respiratory muscles, in which myofibers are progressively replaced by non-muscular fibrotic tissue. Here, we show that fibrin/ogen accumulates in dystrophic muscles of DMD patients and of the mdx mouse model of DMD. Genetic loss or pharmacological depletion of fibrin/ogen in mdx mice attenuated muscular dystrophy progression and improved locomotor capacity. More importantly, fibrin/ogen depletion reduced fibrosis in mdx mouse diaphragm. Our data indicate that fibrin/ogen, through induction of IL-1 Ò, drives the synthesis of TGF Ò by mdx macrophages, which in turn, induces collagen production in mdx fibroblasts. Fibrin/ogen-produced TGF Ò further amplifies collagen accumulation through recruitment and activation of pro-fibrotic alternatively activated macrophages. Fibrin/ogen also stimulated collagen synthesis directly in mdx fibroblasts, via Ñv Ò3 integrin engagement. In addition, when analyzing a group of 39 DMD patients, fibrin/ogen accumulation in locomotor muscles was found associated with fibrosis and disease severity. These data unveil a novel role of fibrin/ogen in muscular dystrophy and, importantly, in the replacement of muscle by fibrotic tissue.

Style APA, Harvard, Vancouver, ISO itp.

44

Schmidt, Uwe. "Uninterruptible power supply system using a dual converter in quasi-resonant mode". Thesis, Brunel University, 1995. http://bura.brunel.ac.uk/handle/2438/5410.

Pełny tekst źródła

Streszczenie:

Uninterruptible Power Supply (UPS) systems have become a standard to protect electronic devices such as servers and host computers. Also, the energy supply of whole buildings is linked with large UPS systems to ensure a steady power flow. Two system configurations are widely used which differ in price and their ability to protect very sensitive load. This thesis illustrates an analytical examination of all existing systems and concludes with the finding of new configurations with increased efficiency and reduced costs. A dual converter is proposed as the heart of the new UPS system. This converter links the necessary two sources of the UPS through a common transformer. The transformer operates at a high frequency which is enabled due to the resonant switching technique used. The results of this paper were achieved using mathematical analysis, electrical and electro-magnetic simulation as well as by experiments carried out on the self designed circuit boards in the laboratory. These boards were built in a modular way to enable series testing and thereby optimise the dimensioning of the system.

Style APA, Harvard, Vancouver, ISO itp.

45

Barbarič, Janez. "Entwicklung von DNA-basierten Multichromophoren und Donor-Akzeptor-Systemen zur Untersuchung des Ladungstransfers in DNA". kostenfrei, 2008. http://www.opus-bayern.de/uni-regensburg/volltexte/2009/1108/.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

46

Hemgren, Amanda, i Natalie Esseen. "Spelen som aldrig växte upp : Nostalgi och dess plats i användarupplevelser av spel". Thesis, Umeå universitet, Institutionen för informatik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-159559.

Pełny tekst źródła

Streszczenie:

Since its commercial outbreak during the 1970’s, digital games have grown to become one of the foremost ways of entertainment. A recent trend that can be observed in the game industry is to remake old games, relaunch classic titles and develop new games in a distinct “retro” style. In this paper we explore nostalgic emotions as a possible explanation behind the fascination to replay games we already played through or play games with graphics that resembles the early era of digital games. Through this research we can provide an understanding of what creates a memorable digital experience, and why some games still live on today. A qualitative user study was conducted where eight players played a game defined by: (1) being a part of a long-lasting franchise or (2) applying the retro aesthetic. The empirical data was captured through observations and interviews. The results from the data gathering where then analyzed and used to answer the questions: what causes nostalgic emotions to occur during the playing of a video game?; How does nostalgic emotions impact the user experience of a game? Through the thematic analysis a model was created to visualize the cause and impact of nostalgia during gaming. We concluded that nostalgia is induced by players recognizing the visual aesthetics, the auditory impressions and the familiar gameplay. Nostalgia impacts the players by inducing emotions such as joy and frustration. The players express a desire for recreating an experience, resulting in expectations and disappointments. Furthermore, nostalgia creates a sense of belonging by allowing players to connect with their memories and the people around them. Finally, nostalgia contributes to the player wanting to invest more time into a game and take part in all aspects of a loved story.

Style APA, Harvard, Vancouver, ISO itp.

47

Baylac, Isabelle. "Le système de santé et le pharmacien d'officine au Royaume-Uni". Bordeaux 2, 2000. http://www.theses.fr/2000BOR2P007.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

48

Jordan, Jens. "Reachable sets of numerical iteration schemes : a system semigroup approach". Doctoral thesis, kostenfrei, 2008. http://www.opus-bayern.de/uni-wuerzburg/volltexte/2008/2841/.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

49

RAJ, ABHISHEK. "CONSUMER PERCEPTION ON UPI". Thesis, 2023. http://dspace.dtu.ac.in:8080/jspui/handle/repository/20208.

Pełny tekst źródła

Streszczenie:

In Simple Words, With the Advent of UPI it is vital for us to get an insight about the effectives and its acceptance among the common people. Also it is Important for the UPI system which was initially inaugurated by the PM Modi in 2016 it was created by NPCL with the help of RBI .IT was supposed to give a boost to the online economy which would farther reduce the black economy and make the Indian Government r have a better tax reserves. In this Study we will get an overview about the use of UPI System and how it is effective in terms of Reliability, Save times, Data Loss, Safety. Also it would entail to explain how this could be helpful in Understanding how and what things are there that effects the UPI system and its acceptance as an online payment system in the general public. Also, this study has a total of 60 participants which answers several questions to give a clear image about how they perceive the UPI system and how do they use it in their general lives day to day manner. This study uses multiple regression model which helps us to find how the variable are dependent or independent on the effectiveness of the UPI System. This study uses a simple questionnaire are that have been used to answer different factors which the respondents rate on the linear scale of 1 to 5 which starts from Strongly Disagree to Strongly agree.

Style APA, Harvard, Vancouver, ISO itp.

50

HONNER, Tomáš. "Komparativní implementace trackovacího systému UAI PřF JU". Master's thesis, 2016. http://www.nusl.cz/ntk/nusl-262668.

Pełny tekst źródła

Streszczenie:

The master's thesis deals with analysis of current solution of car tracking system on Faculty of Science at South Bohemia University and new solution proposal of this system and its implementation and comparison of this solutions. One part of the thesis is proposal of comparison methodology and an experiment with the goal of gaining data from comparison of both implementation. Furthermore, to evaluate results of these comparison and to create conclusion.

Style APA, Harvard, Vancouver, ISO itp.

Rozprawy doktorskie na temat „UPI SYSTEM”

Utwórz poprawne odniesienie w stylach APA, MLA, Chicago, Harvard i wielu innych