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585 Uppsatser om Signal transmission - Sida 24 av 39

Konceptstudie av eltransmission för 8-hjulsdrivet fordon

SEP Modular Armoured Tactical System is the next generation of military vehicles developedby BAE Systems Hägglunds AB. At present time, BAE Systems Hägglunds AB aredeveloping a 6-wheel electrical hybrid and a conventional 8-wheel vehicle. The questionformulation was summarized as: ?In which ways can the electrical transmission in a hybriddriveline for SEP be designed, when the surrounding fixed interfaces are kept and the unity ofcomponents within SEP is maximized??. The purpose of this master thesis was to study avariety of concepts for hybrid propulsion.

Kappa Control with Online Analyzer Using Samples from the Digester's Mid-phase

In the pulp industry, digesters are used to disolve lignin in wood chips. The concentration of lignin is measured and is called the Kappa number. In this thesis, the question of whether an online Kappa sensor, taking samples from the mid-phase of the digester, is useful or not is analyzed. For the samples to be useful, there has to be a relationship between the measured Kappa at the mid- phase and the measured Kappa in the blowpipe at the bottom of the digester. An ARX model of the lower part of the digester has been estimated.

?Det finns inga genvägar? En fallstudie av Södra Älvsborgs Sjukhus verksamhetschefers upplevelse av strategisk internkommunikation

Communication is essential for the survival of an organization. The management formulates strategies to ensure thatthe organization will get to where they want it to go. The strategy is then communicated to the co-workers through the line manager. But who is to say that the co-worker experience the message the same way as the line manager or the management for that matter? The purpose of this study is toinvestigate how the middle managers at Southern Älvsborg Hospital experience strategic internal communication andfurther how they communicate with their co-workers.Through a case study approach, the case being the communication of the hospitals research strategy, I conducted 13 interviews.I analyzed the material from the interviews using a hermeneutical approach and I used an interpretative approach to get a deeper understanding.

Lokalisering av skidor i lössnö : Självständigt arbete i Teknisk Fysik

This report studies the possibility of using some sort of radio sender and transmitter in order to position skis lost in powder snow. It is concluded that a RF-solution on the 433 MHz frequency should be the most efficient. Different forms of directional antennas are examined and studies show that in theory the best suited is the so called ?Yagi-Uda antenna?. A solution based on using a Receive Signal Strength Indicator value together with the above mentioned directional antenna is developed.

Projektering av radiatorsystem och fjärrvärme sekundärsystem : Projektering av radiatorsystem och fjärrvärme sekundärsystem för bostadsrättsföreningen Stålet, Luleå.

Bostadsområdet Stålet i Luleå ägs av en bostadsrättsförening som omfattar 30 stycken lägenhetshus. Riksbyggen är fastighetsförvaltare för denna förening och sköter bl.a. den tekniska förvaltningen. Riksbyggen har fått i uppgift att se över föreningens radiator- och fjärrvärme sekundärsystem för att i förlängningen eventuellt byta ut dessa system pga. eftersatt underhåll och med osäker drift som resultat.

Diagnostiska metoder för växtvirus i nematodvektorer :

ABSTRACT Tobacco Rattle Virus (TRV) is a soilborne plant virus. It is an important pathogen in potatoes where it causes spraing disease. This disease can lead to significant economical loss for the farmer, so it is imperative to get the proper diagnose before planting. TRV is spread naturally by free-living nematodes (Trichodorus and Paratrichodorus). Transference of TRV to a plant occurs when the virus-carrying nematodes feed on plant roots. The relationship between virus, nematodes and plants is complicated, and has to these days not been fully characterized. The diagnostic methods available today do not work sufficiently.

Uncord Audio - Formgivning av produkt för trådlös ljudöverföring

The thesis work was conducted with the company Free2Move AB. The company is located in Halmstad and is an acting provider of wireless communications for industrial customers, mainly focused on Bluetooth? technology.In today's society most people have their music on their computer, MP3 player or mobile phone. What if you could avoid the cable between your sound system and sound source and transfer music wirelessly instead? Together with the company's engineers, I have developed a new comprehensive product for wireless music transmission.

?Utveckling av kaffekvarns användargränssnitt

Denna rapport behandlar den process då ett befintligt koncept på en kaffekvarn skall utvecklas med hänsyn till interaktion och gränssnittsdesign.Litteraturstudier utfördes för att få en djupare kunskap inom ämnen som designprinciper, färglära, semiotik och användbarhet. I förstudien gjordes en marknadsanalys där målet var att få användarens syn på den kaffekvarn som används. Samtliga tillfrågade användare var nöjda med den kvarn som brukas och ansåg att det ljud som uppstår vid malning är en viktig signal som ges till användaren. Med de kommentarer som uppstod och den marknadsanalys som utfördes skapades en kravspecifikation med krav som att kvarnen skall vara lätt att rengöra och användaren skall förstå dess funktion utan manual.Konceptgenereringsmetoder som moodboard och stimulianalys användes för att generera nya koncept som utvärderades med hjälp av pluralistisk genomgång. Utefter dessa metoder, och den information som under tidigare faser erhållits skapades ett slutligt koncept; en kaffekvarn med lutad display för att öka användarens betraktningsvinkel samt böjda gejdrar för en smidig insättning av filterhållare.

EKG-analys och presentation

Tolkningen av EKG är en viktig metod vid diagnostisering av onormala hjärttillstånd och kan användas i förebyggande syfte att upptäcka tidigare okända hjärtproblem. Att enkelt kunna mäta sitt EKG och få det analyserat och presenterat på ett pedagogiskt sätt utan att behöva rådfråga en läkare är något det finns ett konsumentbehov av.Denna rapport beskriver hur en EKG-signal behandlas med olika algoritmer och metoder i syfte att detektera hjärtslag och dess olika parametrar. Denna information används till att klassificera varje hjärtslag för sig och därmed avgöra om användaren har en normal eller onormal hjärtfunktion. För att nå dit har en mjukvaruprototyp utvecklats där algoritmerna implementerats. En enkätundersökning gjordes i syfte att undersöka hur utdata från mjukvaruprototypen skulle presenteras för en vanlig användare utan medicinsk utbildning.Sju filer med EKG-signaler från MIT-BIH Arrhythmia Database användes för testning av mjukvaruprototypen.

Prehospital omvårdnad av patienter med akuthjärtinfarkt som transporteras direkt till PCI : ? intervjustudie med sjuksköterskor i ambulans

The prehospital management of patients with acute myocardial infarction (AMI)now includes 12-lead electrocardiogram transmission directly from the ambulance to hospital.If the ECG shows ST-elevated myocardial infarction the patient should be transported directlyto a hospital with capability for percutaneous coronary intervention (PCI).                                               Aim: The aim of this study was to describe how ambulance nurses experienced the prehospital management of patients with AMI who are transported by ambulance directly to hospital for PCI.                                                Method: Semi structured interviews were conducted with eight ambulance nurses. Data were analysed using qualitative content analysis. The categories that emerged were: Use ofcompetence, Responsibility and Insufficiency. Result: The result showed that the ambulance nurses felt secure when they cared for patients transported directly to PCI. The nurses assessed the patient and decided how he or she should be cared for.

Rabies : en utmaning för Indien

This literature study describes the ways in which the spread of rabies can be prevented in India, what guidelines are set and also which methods have proved most effective. Every year rabies causes the death of around 20 000 people in India, which makes the prevalence in the country the highest in the world. The main source for human infection is bite wounds from infected dogs. People and animals can be vaccinated both prophylactic and post-exposure prophylactic (PEP), despite this the disease continues to claim high number of victims. The majority of those dying are young men and children from the poorer part of the population. Knowledge among the Indian population on rabies and its transmission routes, wound care and vaccinations is very limited.

Safe retrieval of nutrients to improve food security

Safe retrieval of nutrients from human excreta to fertilize crops in order to gain adequate yields will increase food security and sustainability in agriculture areas with nutrient-poor fields. Safe and nutritious food will meet the dietary needs of the individual which promotes public health and the ability of an active life. Human excreta should be considered as a resource instead of being assumed as waste. Human faeces and urine is excellent fertilizers which may close the nutrient loop if utilized properly. However, sanitation of the excreta is required to prevent disease transmission by reducing the content of gastrointestinal pathogens such as bacteria, viruses and parasites. The objective of this study was to in small scale evaluate the sanitation in a combined liquid compost and urea treatment by monitor the inactivation of bacteria and viruses at the combination three start temperatures, 45, 40 and 35 °C, and three additions of urea, 0.5, 0.75 and 1 % and reference, 0 % urea addition.

Trådlös kamerastyrning

As an amateur it can be difficult filming from several angles at the same time as this requires several cameras. It´s also hard to film at occasions when it´s not appropriate to manoeuvre the camera manually. Systems for solving these problems already exist, but it´s either more expensive, professionalsystems or cheaper systems with limited functionality.The purpose of this project is to develop a cost efficient solution to the problem above that offers a better functionality then existing commercial systems. The biggest difference from existing products is the wireless video feedback from the camera to the remote unit.The result of the project is a system consisting of two units, a manoeuvre unit with a cradle for the video camera and a remote unit from which the operator can control pan and tilt of the video camera.Communication between the two units is wireless.On the remote unit there is a joystick and a display mounted. In addition to this, there is also an IR receiver that is capable of reading the signal from the cameras own remote and sending it to the manoeuvre unit.The manoeuvre unit is equipped with one motor to control the tilt function and one motor to control the pan.

Trafikverkets effektstyrningssystem - EFS 132 kV : Bidraget till minskade förluster

The technological legacy from the early electrification of the Swedish railroads has resulted in a power grid with a lower grid frequency than the national power grid from which it is fed. Energy transfer between these power grids with different frequencies requires substations, adapting the grid frequency for the rail road power grid. For this purpose, a feeding power grid has been built, stretching across the country from Boden in the north to Tälle/Häggvik in the south.Power transfer in the Swedish power grid results in voltage angle differences which increase with increasing loads and transfer distance. These voltage angle differences are transferred from the power feeding substations to the rail road power grid, will in some extent cause loss of energy due to unwanted power flows from north to south.To minimize the losses due to this phenomenon, a power management system called EFS 132 kV has been developed and implemented. The system minimizes the unwanted power flows and controls the desired power flow for a good distribution of loads between the power feeding substations.This thesis investigates the extent of the transmission losses avoided due to the EFS 132 kV that coordinates the idling angles to a common reference point.The results indicate that EFS 132 kV affects the power flow, especially between the northern substations through an improved load distribution.

Detektering av sprickor i vägytor med hjälp av Datorseende

This thesis describes new methods for automatic crack detection in pavements. Cracks in pavements can be used as an early indication for the need of reparation.Automatic crack detection is preferable compared to manual inventory; the repeatability can be better, the inventory can be done at a higher speed and can be done without interruption of the traffic.The automatic and semi-automatic crack detection systems that exist today use Image Analysis methods. There are today powerful methods available in the area of Computer Vision. These methods work in higher dimensions with greater complexity and generate measures of local signal properties, while Image Analyses methods for crack detection use morphological operations on binary images.Methods for digitalizing video data on VHS-cassettes and stitching images from nearby frames have been developed.Four methods for crack detection have been evaluated, and two of them have been used to form a crack detection and classification program implemented in the calculation program Matlab.One image set was used during the implementation and another image set was used for validation. The crack detection system did perform correct detection on 99.2 percent when analysing the images which were used during implementation.

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