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Traffic efficiency applications over road networks have been investigated recently using VANETs. This area of research is primarily concerned with increasing the traffic fluency over road networks. In this thesis, we first propose an efficient and accurate protocol to detect congested road segments in a downtown area using VANETs. We refer to this protocol as the Efficient COngestion DEtection (ECODE) protocol. ECODE evaluates three different traffic characteristics of each road segment including traffic speed, traffic density, and the time required to travel the segment. Moreover, ECODE evaluates traffic characteristics and detects the congestion level in each direction of the road segment. In addition, we propose an intelligent, dynamic, distributed, and real-time path recommendations protocol. We refer to this protocol as Intelligent path reCOmenDation (ICOD) protocol. ICOD is the first path recommendation protocol that does not rely on a central database of gathered traffic data for each area of interest. Eliminating centralized behavior resolves bottleneck as well as single point of failure problems, which in turn minimizes congestion and collision problems in VANETs. Furthermore, ICOD selects the path towards each destination in a hop-by-hop manner, which makes the turn decision at each road intersection more accurate and real-time. Different variants of ICOD are introduced that consider travel time, travel distance, fuel consumption, gas emissions, and context-awareness of each road segment parameters. Moreover, two traffic balancing mechanisms are proposed in this thesis to distribute traffic over the road network evenly, namely Bal-Traf and Abs-Bal. These mechanisms eliminate the highly congested road segment scenarios that are caused by the path recommendation protocol. Bal-Traf detects and eliminates the highly congested output road segment at each road intersection. However, Abs-Bal aims to keep the traffic density balanced among all output road segments at each road intersection. Finally, we propose an Intelligent Traffic Light Controlling (ITLC) algorithm to schedule the phases of each traffic light at isolated road intersections. This algorithm aims to decrease the queuing delay time of competing traffic flows and to increase the throughput of each signalized road intersection. ITLC has also been adapted in this thesis to the Arterial Traffic Lights (ATLs) algorithm for arterial road network scenarios. In ATLs the expected platoons on the arterial street are considered in the scheduling algorithm of each traffic light located on the arterial street coordinates. Transmitting packets among these traffic lights report the main characteristics of each predicted platoon.

This thesis is concerned with ABS algorithm project for commercial vehicles. In the first part the reader is introduced to the history and first usage of the anti-blocking system, its principles and main functions. There are also driving algorithms and functionality system control. The second part is dedicated to the dynamic model, programs and ADAMS Car and MATLAB Simulink interfaces. It also contains the description of the algorithm, its parameters and basic functionality assay. Simulation, program interlink, testing and tuning are also described. The concluding part deals with results and their assessment.

The work presents a proposal for the production of the connector cover by injection molding from amorphous ABS polymer. Based on a literature study of injection technology and calculations, a two-part injection mold with four cavities, equipped with side sliding trolleys, was designed. The mold is composed of standardized components, some of which are modified. An Intec D100 / 380-B injection molding machine was chosen. The work is accompanied by drawing documentation of the assembly of the mold, molding plates and the designed side sliding trolleys.

This master thesis deals with the surface treatment of parts made of plastic produced using FDM technology and design of technological device for surface treatment. The thesis describes FDM principles, according to performed experiments in a technological device there are suggested technological conditions for the surface treatment of parts made of ABS plastic. In the end of the thesis, there are calculated costs of the technological device and its operating costs, also mechanical properties, surface roughness and other specifications from before and after the treatment are compared.

As of today, securitization is an established product on the capital market. The first transaction was made in the US in the 1970s. Since then the product has been developed and today there are several different structures of the product. Internationally securitization has been used for two reasons. Originally securitization was used to gain capital relief, but since capital requirements such as Basel II were implemented, the usage of securitization changed to more of a funding source. The purpose with this paper is to highlight the benefits and risks concerning securitization and to investigate the demand for securitization on the Swedish market. If the demand was found to be low, we would further examine why it’s low. We have investigated which assets are best suited for securitization and above all how the Swedish market will develop in the future. Securitization has been studied all across the world mainly due to the financial crisis, but studies from Sweden is lacking. Our literary sources are complemented with empirical knowledge through interviews of people with expertise in securitization. The paper is divided into three parts. The first part will deal with the theoretical aspects regarding securitization. The second part will process the empirical angels of securitization. In the third part we present an analysis and our own reflections on the subject. The Swedish securitization market has historically seen rather few transactions, despite the strength of the Swedish economy. Our research found that the assets used for securitization is mainly residential mortgage portfolios and consumer credits. These assets have certain characteristics and most importantly they are generating a good cash flow and can be structured in vast numbers to diversify a bank’s portfolio. How the market will develop in the future depends on how the bank sector will respond to Basel III requirements, the structure of future transactions and the competence of originators and buyers.

Termoplaster används i en mängd olika produkter världen över. En starkare termoplast kan leda till att en mindre mängd material behövs för att bibehålla samma styrka i en produkt. En lättare produkt kan exempelvis leda till minskad bränsleförbrukning vilket är positivt i avseende för miljön, socialt och ekonomiskt.  Ett möjligt sätt att tillverka en starkare termoplast skulle kunna vara att förstärka den med cellulosafibrer. FineCell Sweden AB tillverkar cellulosafibrer i mikrostorlek genom en miljövänlig och energieffektiv kemisk process, vilket resulterar i en ekologiskt hållbar produkt. Nya tillverkningsmetoder som additiv tillverkning tillåter nya möjligheter för de former som kan tillverkas med termoplaster. Det är intressant att undersöka om det går att använda en cellulosaförstärkt termoplast till 3D-printning. Detta examensarbete har fokuserat på extrudering av mikrocellulosaförstärkt filament, och hur olika tillverkningsprocesser påverkar kvalitén och hur de mekaniska egenskaperna påverkas. Resultatet visar att mikrocellulosan i vissa fall kan ge ökad elasticitetsmodul, och att torkning och hantering av cellulosan innan extrudering är avgörande för egenskaperna, då eventuell fukt leder till porer vilka påverkar de mekaniska egenskaperna negativt.  I vidare arbete skulle fler materialegenskaper för det tillverkade filament vara intressant att undersöka. Det skulle vara intressant att tillverka filament med en ”Twin-screw” extruder, då det kan fördela fibrerna och skjuva till mindre storlek. Det skulle även vara intressant att undersöka mikrocellulosaförstärkning med andra typer av tillverkningsmetoder, högre fiberandelar och andra sorters termoplaster. / Thermoplastics are used in a variety of products worldwide. A stronger thermoplastic could lead to a smaller amount being needed to maintain the same strength in a product. A lighter product can, for example, lead to reduced fuel consumption, which is positive for the environment, socially and economically. One possible way to make a stronger thermoplastic could be to reinforce it with cellulose fibers. FineCell Sweden AB manufactures micro-sized cellulose fibers through an environmentally friendly and energy-efficient chemical process, which results in an ecologically sustainable product. New manufacturing methods such as additive manufacturing allows new possibilities for the shapes that can be manufactured with thermoplastics. It is interesting to investigate whether it is possible to use a cellulose-reinforced thermoplastic for 3D-printing. This master thesis has focused on the extrusion of microcellulose-reinforced filament and how different manufacturing methods affect the quality and how the mechanical properties are affected. The results show that the microcellulose can in some cases give an increased modulus of elasticity and that drying and handling of the cellulose before extrusion is decisive for the properties, as any moisture leads to pores which adversely affect the mechanical properties. In further work, more material properties of the manufactured filament would be interesting to investigate. It would be interesting to make filaments with a "twin-screw" extruder, as it can distribute the fibers and shear to a smaller size. It would also be interesting to investigate microcellulose amplification with other types of manufacturing methods, higher fiber ratios and other types of thermoplastics.

This research investigates the application of additive manufacturing techniques for fabricating hybrid rocket fuel grains composed of porous Acrylonitrile-butadiene-styrene impregnated with paraffin wax. The digitally manufactured ABS substrate provides mechanical support for the paraffin fuel material and serves as an additional fuel component. The embedded paraffin provides an enhanced fuel regression rate while having no detrimental effect on the thermodynamic burn properties of the fuel grain. Multiple fuel grains with various ABS-to-Paraffin mass ratios were fabricated and burned with nitrous oxide. Analytical predictions for end-to-end motor performance and fuel regression are compared against static test results. Baseline fuel grain regression calculations use an enthalpy balance energy analysis with the material and thermodynamic properties based on the mean paraffin/ABS mass fractions within the fuel grain. In support of these analytical comparisons, a novel method for propagating the fuel port burn surface was developed. In this modeling approach the fuel cross section grid is modeled as an image with white pixels representing the fuel and black pixels representing empty or burned grid cells. (80 pages)

The aim of this work is to investigate the potential of Laser-Induced Breakdown Spectroscopy (LIBS) for identification of visually unrecognizable braking tracks. Identification of these tracks is based on different chemical composition of tire tread in comparison to road surface. The investigation was divided in several sequential steps – selection of suitable chemical element and its spectral line for break tracks identification; determination of the limits of detection and threshold intensity respectively for the selected chemical element; verification of LIBS ability to detect braking tracks on a real braking track. This testing braking track was prepared by exactly defined and described conditions. The detection was performed in two ways – laboratory analysis of tire treads particles collected via adhesive tape and in situ analysis via mobile apparatus. Results of both measurements showed that LIBS is able to detect visually unrecognizable braking tracks. Concepts of the devices capable of routine braking tracks identification for both possibilities were introduced.

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