Agricultural vehicles use electronic control units (ECUs) as control system. HistoricallyECUs have only been equipped with a minimum of features. With therecent progress in electronics, which have made components faster, smaller andcheaper, the trend is now to integrate more advanced functionality into the ECUs. Agricultural vehicles are present all over the world and they have to operateunder a wide variety of conditions. This put high requirements on the system andit is critical that a modern ECU can detect and locate errors. For an ECU to beable to operate on a world-wide market it is required to be flexible, expandableand robust. In addition to these requirements it is also wanted that an ECU havea long lifespan and a low cost. In this thesis different problems that modern ECUs have to face are investigated.Suggestions of how to solve these problems are also presented. Thereare two focuses in the thesis, 1) how ECUs can acquire information from its inputs/outputs; and 2) the requirements of the ECU hardware. This thesis does not aim to deliver a fully specified system description butrather to provide an overview of how an ECU can be designed and which problemsthat it has to face. A selection of areas of ECU design which are investigated in this thesis are,1) typical inputs/outputs; 2) analog-to-digital converters and their application; 3)how multiplexers can be used; 4) requirements of general purpose inputs/outputs(GPIO); 5) monitoring of a controller area network (CAN); 6) power-supply requirementand monitoring; 7) monitoring of the vehicle’s battery; 8) memory; 9)requirement of the microcontroller (MCU);Agricultural vehicles use electronic control units (ECUs) as control system. HistoricallyECUs have only been equipped with a minimum of features. With therecent progress in electronics, which have made components faster, smaller andcheaper, the trend is now to integrate more advanced functionality into the ECUs.Agricultural vehicles are present all over the world and they have to operateunder a wide variety of conditions. This put high requirements on the system andit is critical that a modern ECU can detect and locate errors. For an ECU to beable to operate on a world-wide market it is required to be flexible, expandableand robust. In addition to these requirements it is also wanted that an ECU havea long lifespan and a low cost.In this thesis different problems that modern ECUs have to face are investigated.Suggestions of how to solve these problems are also presented. Thereare two focuses in the thesis, 1) how ECUs can acquire information from its inputs/outputs; and 2) the requirements of the ECU hardware.This thesis does not aim to deliver a fully specified system description butrather to provide an overview of how an ECU can be designed and which problemsthat it has to face.A selection of areas of ECU design which are investigated in this thesis are,1) typical inputs/outputs; 2) analog-to-digital converters and their application; 3)how multiplexers can be used; 4) requirements of general purpose inputs/outputs(GPIO); 5) monitoring of a controller area network (CAN); 6) power-supply requirementand monitoring; 7) monitoring of the vehicle’s battery; 8) memory; 9)requirement of the microcontroller (MCU);

To be able to handle tomorrows need for limited energy consumption we need to reduce our use of energy. The building sector stands for around 40 % of all energy consumption in the society. The government has put up a goal to reduce the energy consumption in our buildings with 20 % by year 2020 and 50 % by year 2050 compared with year 1995. To be able to do reach that goal we need a more energy efficient building stock. The main part of the energy used in our buildings is used for space heating. By installing ventilation systems with heat recovery on the exhaust air it is possible to use the heat-energy in the exhaust air to warm up the incoming air. This can contribute to a reduction in energy use. A ventilation system with heat recovery on the exhaust air is space demanding and there can be problems with finding enough space to do the installation indoors. Therefore it can be an advantage to place the aggregate and the ducts on the outside of the buildings climate shell. A placement exterior of the buildings climate shell or in an unheated space leads to thermal heat losses. The aim with this essay is to investigate how significant the heat losses are on exterior placed ventilation systems. The investigation has been done with help of theoretical calculations and measurements of the temperature difference in the ventilation ducts. Analysis has been made on life cycle costs on how to reduce the heat losses in an economic manner. To buildings, Höstvägen 14 and 22 in Växjö, which have been equipped with exterior placed ventilation systems have been studied. The two buildings have two different types of installation of the ducts. Our result shows that the heat losses through the ventilation systems on Höstvägen 14 and 22 are significant. The majority of the losses occur in the ducts. In the aggregate the thermal bridges in the framework accounts for the larger part.

The FPGA GPU architecture proposed in this thesis was motivated by underserved markets for graphics processing that desire flexibility, long-term device availability, scalability, certifiability, and high reliability. These markets of industrial, medical, and avionics applications often are forced to rely on the latest GPUs that were actually designed for gaming PCs or handheld consumer devices. The architecture for the GPU in this thesis was crafted specifically for an FPGA and therefore takes advantage of its capabilities while also avoiding its limitations. Previous work did not specifically exploit the FPGA's structures and instead used FPGA implementations merely as an integration platform prior to proceeding on to a final ASIC design. The target of an FPGA for this architecture is also important because its flexibility and programmability allow the GPU's performance to be scaled or supplemented to fit unique application requirements. This tailoring of the architecture to specific requirements minimizes power consumption and device cost while still satisfying performance, certification, and device availability requirements. To demonstrate the feasibility of the flexible FPGA GPU architectural concepts, the architecture is applied to an avionics application and analyzed to confirm satisfactory results. The architecture is further validated through the development of extensions to support more comprehensive graphics processing applications. In addition, the breadth of this research is illustrated through its applicability to general-purpose computations and more specifically, scientific visualizations.

No description available.

Network structures based upon metal-organic backbones represent a new class of functional materials that can be rationally constructed by employing the concepts of supramolecular chemistry and crystal engineering. The modularity of design strategies, the diversity of prototypal structures, and the dynamic features of networks have afforded great advantages over traditional materials syntheses. The research presented in this dissertation is primarily concerned with developing an in-depth understanding of the basic principles that govern the supramolecular behaviors of metal-organic frameworks and gaining an experimental control over the structure and function of these new classes of hybrid materials. The use of rigid and angular organic ligands along with transition metal clusters gives rise to a wide variety of novel metal-organic architectures ranging from zero-dimensional nanostructures to three-dimensional frameworks. Gas sorption experiments suggest some of these compounds are potentially useful as porous materials. Conformational analysis of these structural models reveals geometrical foundations for the existence of superstructural diversity. Controlled crystallization experiments further indicate synthetic factors that might determine the formation of supramolecular isomers. On the other hand, careful selection of more labile organic components leads to flexible metal-organic frameworks exhibiting dynamic characteristics that have not been observed in their rigid counterparts. The guest-dependent switch-on/off of cavities and the ease of fine-tuning their chemical environments demonstrate the effectiveness of such a strategy in the context of generating tailored functional materials. Discovery and recognition of novel three-periodic metal-organic nets remains a nontrivial exercise. In this context, rigorous topological analysis assists the understanding of complicated nets and application of geometrical principles facilitates desing of new metal-organic structures. Finally, scaled-up metal-organic frameworks are potentially accessible with the aid of existing prototypal structures and a systematic study on ligand design.

Οι προγραμματιζόμενοι επεξεργαστές γραφικών (Graphics Processing Units - GPUs), είναι πανίσχυροι παράλληλοι επεξεργαστές και πλέον υπάρχουν σε κάθε σύγχρονο προσωπικό υπολογιστή (PC). Οι GPUs αναλαμβάνουν κι επιταχύνουν την σχεδίαση δισδιάστατων και τρισδιάστατων γραφικών στην οθόνη του υπολογιστή. Η εξέλιξή τους είναι τόσο ραγδαία τα τελευταία χρόνια, που πλέον ξεπερνούν σε πολυπλοκότητα τις σύγχρονες κεντρικές μονάδες επεξεργασίας (CPUs), ενώ είναι ικανές να επιταχύνουν εκτός από γραφικά κι άλλες απαιτητικές σε επεξεργαστική ισχύ εφαρμογές, όπως είναι η τεχνητή νοημοσύνη και η προσομοίωση φυσικών αλληλεπιδράσεων μεταξύ αντικειμένων (συγκρούσεις, εκρήξεις, προσομοίωση κίνησης υγρών) κ.α. Σκοπός της συγκεκριμένης εργασίας είναι η δημιουργία, η μελέτη και η βελτιστοποίηση αλγορίθμων σκίασης με χρήση GPUs. Ο όρος σκίαση (shading) αναφέρεται στην αλληλεπίδραση του φωτός με τα αντικείμενα ενός εικονικού περιβάλλοντος. Παρουσιάζονται τα εργαλεία (APIs) και οι γλώσσες προγραμματισμού των GPUs καθώς και τρόποι βελτιστοποίησης της εκτέλεσης των σκιάσεων που είναι ένα θέμα μείζονος σημασίας σε προσομοιώσεις πραγματικού χρόνου. / Graphics processing units (GPUs), are powerful parallel processors and today are found in every modern Personal Computer (PC). The GPUs accelerate the drawing of two and three dimensional graphics on the monitor of the PCs. The evolution of this hardware is very rapid the last decade and today these circuits are more complex than CPUs. They are capable of accelerating many demanding applications except graphics, like Artificial Intelligence and Physics Simulation. The purpose of this thesis is to implement, study and optimize the execution of shading algorithms that run on GPUs in real time. The term shading refers to the interactions between light and the material of every object in a virtual three dimensional environment. In this thesis we present the tools, the programming languages and techniques for optimizing the execution of the shaders which is a matter of major importance in real time simulations.

Darbo objektas yra lietuvių kalbos samplaikos, apibrėžiamos kaip dvižodžiai ar ilgesni iš kaitomų ir nekaitomų žodžių sudaryti stabilieji junginiai, sudarantys vientisos reikšmės leksinį vienetą, kuris dažniausiai vartojamas nesavarankiškos (tarnybinės) kalbos dalies funkcija. Disertacijos tyrimo tikslas – ištirti lietuvių kalbos samplaikų, kaip leksinio vieneto, pasižyminčio formos ir turinio stabilumu, autonomiškumą. Darbo šaltiniai: neanotuotas Dabartinės lietuvių kalbos tekstynas, morfologiškai anotuotas lietuvių kalbos tekstynas ir lygiagretusis vokiečių–lietuvių kalbų tekstynas. Darbo metodai: aprašomasis metodas, tekstynų lingvistikos metodas, statistiniai metodai, gretinamasis metodas. Ginamieji teiginiai: 1. Remiantis išplėstąja frazeologijos samprata, samplaikos yra sustabarėjusių kalbos vienetų tipas, laikomas frazeologijos objektu nuo tada, kai tekstynų analize įrodytas šių junginių dažnumas ir vartojimo pastovumas. 2. Samplaikų stabilumas yra nevienodas. Samplaikų dėmenų traukos įverčio ir morfologinės paradigmos nuokrypio tyrimas rodo, kad samplaikų stabilumo laipsnį lemia samplaikų sandara. 3. Samplaikų kontekstui būdingas stabilumas arba kintamumas. Stabilesnių samplaikų kontekstas kintamas, todėl jos yra autonomiškesnės. Mažesniu stabilumu pasižyminčios samplaikos, kurių kontekstas labiau apibrėžtas, yra ne tokios autonomiškos. 4. Autonomiškesnės samplaikos labiau linkusios būti vertimo vienetais nei mažiau autonomiškos. Kuo samplaika autonomiškesnė, tuo... [toliau žr. visą tekstą] / The object of the study is multi-word lexemes (samplaikos in Lithuanian), defined as combinations composed of two or more inflective or non-inflective parts of speech, grammatically and semantically perceived as one unit. The goal of the dissertation is to investigate the autonomy of multi-word lexemes in the Lithuanian language. Two monolingual corpora (the non-annotated Corpus of the Contemporary Lithuanian Language and the morphologically annotated Lithuanian language corpus) and the parallel German-Lithuanian corpus have been used for the extraction and the analysis of data. Several research methods have been applied: descriptive, corpus-based, statistical, and contrastive. The statements to be defended are as follows: 1. According to the broad conception of phraseology, multi-word lexemes are a subtype of multi-word units. They are considered to be an object of phraseology, since their frequency and fixedness have been confirmed by corpus analysis. 2. There are variations in the degree of fixedness of multi-word lexemes. The analysis of collocation strength between the elements of multi-word lexemes and of deviations in morphological paradigm indicates that the degree of fixedness of multi-word lexemes is largely determined by their composition. 3. The context of multi-word lexemes is characterized by stability or variability. The context of more stable multi-word lexemes is variable, which determines their greater autonomy. Less stable multi-word lexemes that occur in... [to full text]

The object of the study is multi-word lexemes (samplaikos in Lithuanian), defined as combinations composed of two or more inflective or non-inflective parts of speech, grammatically and semantically perceived as one unit. The goal of the dissertation is to investigate the autonomy of multi-word lexemes in the Lithuanian language. Two monolingual corpora (the non-annotated Corpus of the Contemporary Lithuanian Language and the morphologically annotated Lithuanian language corpus) and the parallel German-Lithuanian corpus have been used for the extraction and the analysis of data. Several research methods have been applied: descriptive, corpus-based, statistical, and contrastive. The statements to be defended are as follows: 1. According to the broad conception of phraseology, multi-word lexemes are a subtype of multi-word units. They are considered to be an object of phraseology, since their frequency and fixedness have been confirmed by corpus analysis. 2. There are variations in the degree of fixedness of multi-word lexemes. The analysis of collocation strength between the elements of multi-word lexemes and of deviations in morphological paradigm indicates that the degree of fixedness of multi-word lexemes is largely determined by their composition. 3. The context of multi-word lexemes is characterized by stability or variability. The context of more stable multi-word lexemes is variable, which determines their greater autonomy. Less stable multi-word lexemes that occur in... [to full text] / Darbo objektas yra lietuvių kalbos samplaikos, apibrėžiamos kaip dvižodžiai ar ilgesni iš kaitomų ir nekaitomų žodžių sudaryti stabilieji junginiai, sudarantys vientisos reikšmės leksinį vienetą, kuris dažniausiai vartojamas nesavarankiškos (tarnybinės) kalbos dalies funkcija. Disertacijos tyrimo tikslas – ištirti lietuvių kalbos samplaikų, kaip leksinio vieneto, pasižyminčio formos ir turinio stabilumu, autonomiškumą. Darbo šaltiniai: neanotuotas Dabartinės lietuvių kalbos tekstynas, morfologiškai anotuotas lietuvių kalbos tekstynas ir lygiagretusis vokiečių–lietuvių kalbų tekstynas. Darbo metodai: aprašomasis metodas, tekstynų lingvistikos metodas, statistiniai metodai, gretinamasis metodas. Ginamieji teiginiai: 1. Remiantis išplėstąja frazeologijos samprata, samplaikos yra sustabarėjusių kalbos vienetų tipas, laikomas frazeologijos objektu nuo tada, kai tekstynų analize įrodytas šių junginių dažnumas ir vartojimo pastovumas. 2. Samplaikų stabilumas yra nevienodas. Samplaikų dėmenų traukos įverčio ir morfologinės paradigmos nuokrypio tyrimas rodo, kad samplaikų stabilumo laipsnį lemia samplaikų sandara. 3. Samplaikų kontekstui būdingas stabilumas arba kintamumas. Stabilesnių samplaikų kontekstas kintamas, todėl jos yra autonomiškesnės. Mažesniu stabilumu pasižyminčios samplaikos, kurių kontekstas labiau apibrėžtas, yra ne tokios autonomiškos. 4. Autonomiškesnės samplaikos labiau linkusios būti vertimo vienetais nei mažiau autonomiškos. Kuo samplaika autonomiškesnė, tuo... [toliau žr. visą tekstą]

"Multiple Case Study of (Re)-Design and Restructuring of Studio Arts Schools and Departments in the Research University Environment" investigates the effect of a changing academic value system, as it is manifest through activities of studio arts program redesign and restructuring within the specific context of large, public research universities in the United States of America. A multiple case study (of three distinct American studio arts units) of the academic restructuring phenomenon within this specific locus, examining the interplay of studio arts culture with the larger institutional mandates in the restructuring process, this work approaches restructuring as a series of cultural and survivalist responses to a complex and changing environment.

<p>Diss. (sammanfattning) Umeå : Umeå universitet, 2003</p> / digitalisering@umu