The use of Power Line Communication, PLC, as a communication solution for Automated Meter Reading, AMR, is popular by utilities in Sweden and other parts of the world due to demands of accurate and fast meter reading. However the use of the electrical grid as a communication medium is complex and sometimes problematic. This report handles some of the issues and problems that are important to understand when using the grid as a communications medium. Focus is mainly on investigating high frequency distortion in the Kristianstad power grid own by C4energi caused by a frequency converter. Measurements on site are done to investigate signal damping in the grid, different configurations for the frequency converter and signal strength of the PLC-system.

The use of Power Line Communication, PLC, as a communication solution for Automated Meter Reading, AMR, is popular by utilities in Sweden and other parts of the world due to demands of accurate and fast meter reading. However the use of the electrical grid as a communication medium is complex and sometimes problematic. This report handles some of the issues and problems that are important to understand when using the grid as a communications medium. Focus is mainly on investigating high frequency distortion in the Kristianstad power grid own by C4energi caused by a frequency converter. Measurements on site are done to investigate signal damping in the grid, different configurations for the frequency converter and signal strength of the PLC-system.

The use of Power Line Communication, PLC, as a communication solution for Automated Meter Reading, AMR, is popular by utilities in Sweden and other parts of the world due to demands of accurate and fast meter reading. However the use of the electrical grid as a communication medium is complex and sometimes problematic. This report handles some of the issues and problems that are important to understand when using the grid as a communications medium. Focus is mainly on investigating high frequency distortion in the Kristianstad power grid own by C4energi caused by a frequency converter. Measurements on site are done to investigate signal damping in the grid, different configurations for the frequency converter and signal strength of the PLC-system.

The use of Power Line Communication, PLC, as a communication solution for Automated Meter Reading, AMR, is popular by utilities in Sweden and other parts of the world due to demands of accurate and fast meter reading. However the use of the electrical grid as a communication medium is complex and sometimes problematic. This report handles some of the issues and problems that are important to understand when using the grid as a communications medium. Focus is mainly on investigating high frequency distortion in the Kristianstad power grid own by C4energi caused by a frequency converter. Measurements on site are done to investigate signal damping in the grid, different configurations for the frequency converter and signal strength of the PLC-system.

This essay is a comparative study on Migration period ring forts, centered on Sandbyborg, a ringfort situated on the southeastern shore of the Baltic island of Öland.Furthermore this essay focuses on the contemporary Iron Age society, and thestrategical implications of the ringforts in their function as fortifications. Certaininternational comparisons are made, in particular regarding the fortifications in theRoman empire..

Volvo Human Monitoring (VHM) är ett pågående projekt på Volvo Personvagnar där dem bland annat mäter in- och utandning genom en mätutrustning, kallad respiratorisk induktans pletysmograf (RIP), som mäter förändringar av tvärsnittsarean av bröstkorg och buk. När föraren är i rörelse till exempel när hon svänger ändras tvärsnittsarean och en ?störning? i RIP-signalen kan uppkomma.Dessa störningar medför att vid analys av RIP-signalen måste stora manuella justeringar utföras, vilket är mycket tidskrävande, och utrustningens validitet för mätning av in- och utandning ifrågasätts.Syftet med denna studie var att effektivisera analysen av en RIP-signal som registrerats vid bilkörning. Målsättningen var att skapa ett nytt databearbetningsverktyg i Matlab som på ett automatiskt sätt kan detektera in- och utandning från en RIP-signal med högre validitet än det existerande databearbetningsverktyget.I studien utfördes tester på nio förare under bilkörning på landsväg, grusväg, motorväg och i stadstrafik. In- och utandning mättes med en RIP, en pneumotakograf med en tätt sluten ansiktsmask och ett termoelement som var placerad mellan näsa och mun som referensutrustning.Resultatet blev ett databearbetningsverktyg som automatiskt detekterar in- och utandning med högre validitet än det tidigare internutvecklade databearbetningsverktyg.

Under 2000-talet har begrepp som E-Government och 24-timmarsmyndighet kommit att fo?ra?ndra offentliga myndigheters sa?tt att erbjuda tja?nster och interagera med medborgare. Att genom e-tja?nster erbjuda medborgare alternativ till de traditionella kanalerna a?r na?got som de flesta svenska myndigheter och kommuner stra?var mot. Skelleftea? Kommun tog redan i bo?rjan av 2000-talet initiativ att erbjuda service inom ramen fo?r begreppet 24- timmarsmyndighet och erbjuder i nula?get en rad e-tja?nster riktade mot kommunens medborgare.

This report is an outcome of a master degree project at Linköpings University in co-operation with Micronic Laser Systems AB. The purpose with this master degree project was to investigate how to implement a receiver in a data transfer system. The system consists of several data channels, where every channel consists of three parts: driver, transmission lines and receiver. The driver send low amplitude differential signals via the transmission lines to the receiver that amplifies and converts it to a single-ended signal. The receiver has to be fast and be able to feed an output signal with high voltage swing.

The report examines the factors which may be a contributing cause to the problems that are present when ferritic stainless steel are eddy current tested in a warm condition. The work is carried out at Fagersta Stainless AB in Fagersta which manufactures stainless steel wire. In the rolling mill there is an eddy current equipment for detection of surface defects on the wire. The ferritic stainless steels cause a noise when testing and this noise complicates the detection of defects.Because of this, a study was made of how the noise related to factors such as steel grade, temperature, size and velocity. By observing the signal and with the possibilities to change the equipment settings the capability to let a signal filter reduce the noise level were evaluated.

Det kommer konstant ut amerikanska nyinspelningar av andra länders filmer. Vad är det som skapar behovet av nyinspelningar? Vi har analyserat och jämfört tre japanska skräckfilmer med amerikanska nyfilmatiseringar (s.k. ?remakes?) för att försöka förstå vad det finns för kulturella särdrag i respektive länders gestaltning av filmberättartekniska konventioner av rum och tid och skillnader i kunskapsnivå om filmens händelser mellan protagonist och åskådare..

Utg?ngspunkten f?r den h?r uppsatsen ?r det s? kallade implementeringsproblemet, som inneb?r ett glapp mellan beslut och genomf?rande och har betydelse f?r fr?gor om makt, ansvarsutkr?vande, resultat och effektivitet. Uppsatsen j?mf?r implementering av tv? olika arbetsmetoder i en hierarkisk organisation, Polismyndigheten. Ett m?l med ombildningen till en Polismyndighet 2015 var f?rb?ttrade resultat och ?kad kvalitet i verksamheten. Statskontorets utv?rdering av reformen 2018 visade dock p? sv?righeter i styrningen, exempelvis vad g?ller att f? genomslag f?r olika arbetsmetoder.

This master thesis was a continuation of a previous study in the diesel exhaust characterization, which is part of the academical work embedded in the EMIR-1 project. The main objective of this thesis work was to finish the installation and make the proper modifications of the particulate mass measuring system located in one of the engine test cells at KTH, in order to be able to measure the mass of the particles from the exhaust of diesel engines.This experiment requires a diluted flow sample from the exhaust that should be sent to the device that makes possible the measurement of particle mass, called TEOM. In the first stage of this project, the objective was to study and make the proper modifications in the existing KTH diluter because there were several problems to obtain a constant dilution ratio from it during tests.This modifications were made and it resulted in a great improvement in the maximum inlet and outlet flow that this diluter can handle. Therefore another modification is proposed for controlling the inlet exhaust flow so it will be possible to regulate the dilution ratio and make it constant along a wide range of engine loads and speeds.The second and most important stage was to make particulate mass measurements possible by analyzing the frequency signal from the TEOM device. The idea was to obtain the frequency of oscillation from the tapered element in the TEOM, and therefore with the proper correlations, be able to predict the particulate mass concentration in the exhaust flow from the engine.An electrical problem in the TEOM circuit was detected and corrected, so the signal that carries the frequency from the TEOM can be analyzed properly.

Fo?rfattarna till detta examensarbete har intresserat sig o?ver hur innovationer kan sprida sig till olika nationer genom exempelvis sma? innovativa verksamheter. I denna forskningsstudie underso?ker fo?rfattarna hur innovationer sprider sig till andra nationer och om innovationsspridningen kan relateras till en internationaliseringsmodell, delforskningsfra?gan grundar sig i Rothwells femte generationens innovationsprocess. Fo?rfattarna har valt att anva?nda sig av en kvalitativ metod, med en deduktiv ansats da?r underso?kningen har sin utga?ngspunkt fra?n teorin.

Denna uppsats har syftat till att go?ra en kartla?ggning o?ver hur personer o?ver 55 a?r anva?nder digitala kanaler info?r resor samt deras a?sikter kring denna anva?ndning. Genom en fallstudie av Kulturresor Europa har studien fa?tt ett producentperspektiv som kan relateras till kartla?ggningen av a?ldersgruppen. Fo?r att genomfo?ra detta har en kvantitativ enka?tunderso?kning legat till grund.

The primary function of a mixer is to keep a fluid in constant motion. All mixing applicationsrequire varying degrees of small-scale turbulence and bulk flow. The performance of asubmersible mixer is measured by the thrust that it produces, while the strength of the bulkflow is dependent on the total amount of installed thrust.In a mixer, the fluid quickly flows past the propeller, and as a result, the current is mainlyaxial. The fluid will also obtain a rotating velocity, or a swirl, though this is significantly lessthan that of the propeller. During the process, the total amount of energy increases in the formof static pressure and kinetic energy.