This thesis studies the Physical Layer (PHY) of the new IEEE 802.11acWireless Local Access Network (WLAN) standard. The 11ac is built basedon the 11n successful standard. The standard is expected to be completedby the end of 2013. And it promises a Very High Throughput (VHT),and robust communication. In order to achieve that, the 11ac uses morebandwidth, it employs higher numbers of Multiple-Input Multiple-Output(MIMO) spatial streams, and higher orders of modulations. The 11ac PHYframe structure is studied in details. The transmitter and receiver blocks areexplained and implemented by MATLAB. Bit Error Rate (BER) and ErrorVector Magnitude (EVM) simulations of the PHY were run. The effectof different Modulation and Coding Scheme (MCS), and bandwidths werestudied. The performance of MIMO and Space-Time Block Coding (STBC)was investigated. The simulation results shows how the 11ac benefits fromthe new employed features. The created MATLAB simulation program canbe used for further tests and research.

Krisur is a project about a low energy device that works as a “lifesaving” object with the function of pairing, or connecting, the single individual to the Government in case of emergency. The aim of this is to explore and tackle new possibilities for connecting people to a no-hackable source or to a social system (e.g., Hesa Fredrik). This will also bring a reflection around geo-political transformation over time and in what way lo-fi technology is connected to it.

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A significant growth was witnessed in the field of Wireless Sensor Networks (WSNs), in the previous decade. The objective of this study has been Survey of micro controllers and short-range radio transceivers for wireless sensors and provide an extensive overview of micro controllers and RF-transceivers in the Market and compare the relevant properties for designing wireless sensor nodes. In the survey, RF-transvers from Nordic semiconductors is extensively presented for short-rang wireless protocols some of the protocols are RF-Communication Module, Bluetooth Low Energy Module, ZigBee module and Wi-Fi module.          In WSNs node design Power consumption is one the most important design issue, this thesis work present the different type of WSN protocols energy consumption efficiency and power consumption, compared and conclude graphically.        Microcontrollers are the main part of WSNs node for processing and gathering sensor data. There is different microcontroller’s products in the market however the WSN protocols presented in this thesis uses Cortex-M4 processor which is one of ARM product, the specification and comparison of this product with other products is presented.

This document provides overview of commonly used standards and mechanisms for securing the wireless network based on Wi-Fi protocol. It is covering all important security areas including confidentiality, integrity and authentication. We can find here also detailed analysis and description of functionality of listed mechanisms. Description of possible attacks against listed security mechanisms. There is a measurement of influence of encryption to transfer speed in the another section. It's followed by attacks against particular security mechanisms. And finally, description of deployment of central authentication system.

The Institute of Clean Energy Technology (ICET) at Mississippi State University was awarded a contract by the DOE to design, fabricate, assemble, and characterize a research grade test stand to assist in the development of ASME AG-1 Section FI Metal Media Filters. The major barriers to completing the code section is development of a test stand for collecting data necessary to specify performance requirements for use and for filter qualification. Currently there is not a test stand capable of performing this testing. Performance criteria for the FI test stand were developed by the Section FI project team and ICET. These performance criteria were used to create a test stand to collect the data necessary to get Section FI balloted and approved.

This thesis project builds upon one of the really big questions; are we alone in the universe?By research, references and studies I have throughout this project tried to imagine a future that with the help of architectural speculation and imagination is a bit more prepared to answer that question. The project in itself was intended as an exploration of the world of science, science fiction and conspiracies, as well as typology, in order to produce architecture that represented the very notion of the longing for an answer to that question.  I wanted to both design spaces where one would prepare for the journey of leaving earth, as well as speculate on what type of architecture would be required to welcome a potential visitor of our planet. The result is a proposed future extension to Kiruna Airport intended for interplanetary travel, some parts concrete and real, some speculative and suggestive.

Den här uppsatsen är utförd i syfte att teoretiskt introducera trådlös övervakning och styrning ombordpå fartyg och undersöka om det är ett alternativ till signalkablar. Arbetet belyser regelverk ochstandarder som är relevanta för en installation av trådlöst system ombord och vad som krävs för attinstallationen inte skall bryta mot befintliga bestämmelser och undersöker om trådlösa signaler kanöverföra information trots att sändarna/mottagarna är omgivna av bland annat maskiner och skott avmetall.De allra flesta fartyg har stora mängder med signalkablar ombord som har i uppgift att överföra dataoch signaler mellan olika platser på fartyget. Dessa kablar är ofta placerade tätt intill varandra ochmonterade på ofta svåråtkomliga platser vilket innebär att kabelbrott och andra fel med kablarna ärsvåra att felsöka. Som lösning på detta kan signalerna istället överföras via ett trådlöst nätverk vilkettar bort möjligheten med kabelbrott i signalkablar och behovet att felsöka utdragna signalkablar.Informationen som överförs trådlöst blir också tillgänglig på fler platser om maskinbesättningen harhanddatorer. Alltså finns inte längre behovet av att ta sig till en kontrollpanel för att avläsa informationutan den kan avläsas med en handdator vilket ger upphov till en förenkling och effektivisering avarbetet ombord.Resultatet för arbetet nåddes främst med insamling av relevanta regelkrav och föreskrifter frånTransportstyrelsen och klassningssällskapet DNV samt artiklar och rapporter med mer sakligt teknisktinnehåll och en intervju med en systemtekniker på ett svenskt universitet. Vilket visar att det teoretisktinte finns direkta hinder för en installation av trådlös signalöverföring ombord då inga lagar behandlarexakt just installationen av system med trådlösa signaler. Dock finns krav från klassningssällskap förfunktion och utförande av trådlösa nätverk. Utöver det står det i flera regelverk och standarder attalternativa system som har samma funktion som det befintliga kan godkännas så länge det inte gerupphov till försämrad säkerhet eller driftstörningar. Hänvisning till annan forskning visar också att dentrådlösa signalöverföringen går att bygga upp så att det inte störs ut av allt i fartyget som är byggt avmetall. / This essay is written with the purpose of theoretically introducing wireless monitoring and controllingon board ships and examine whether it is an alternative to signal cables that would work in reality. Theessay illustrates the regulations and standards that are relevant for the installation of a wireless systemon board and what is required for the installation not to violate existing regulations and examineswhether wireless signals can theoretically transmit information despite the fact that the signals aresurrounded by the ships metal hull.A majority of vessels have large ammounts of signal cables installed on board which have the purposeof transmitting data and signals between different locations on board. These signal cables are ofteninstalled tightly together and in difficultly accesible places which implicates that breakage in cables orother cable related issues are hard to troubleshoot and resolve. As a solution to this problem, thesignals that these cables are meant to carry can be transmitted wirelessly which completely eliminatescable breakage and the need of troubleshooting cable related issues in places that are hard to access.The information thats being transmitted wirelessly also becomes accesible in multiple places on boardas long as the crew on board uses handheld computers that are connected to the local network.Therefore there i no need to enter the control room to read the information that is being transmitted,but can instead be recieved wirelessly in the entire engine room using a handheld computer. Thismakes working in the engine room both easyer and more efficient.The results of this essay were achieved by collecting information from relevant regulations anddirectives from Transportstyrelsen and DNV and also articles and reports with substantive technicalcontent as well as a interview with a systemtechnician at a swedish university. The results shows thattheoretically there are no direct obstacles for the installation of wireless signal transmitters on board.As there are no specific regulations regarding wireless systems that directly correlate with what thisessay is mentioning. It is generally written that when it comes to electrical installations, the cablesbeing installed must, amongst other demands, meet certain dimensions and have a certain distance toeach other to prevent unnecessary magnetic fields to occur. This is not applicable to the wirelesssystem that the essay deals with as the essay is about eliminating signal cables. However it I stated inseveral regulations and standards that alternatives to already existing systems that have correspondingfunctions to the already existing systems can be considered as long as the alternative system does notcause operational disruptions or impair safety. Reference to other research shows that wireless signaltransmitting can be built in such ways that the wireless signals are not disrupted by the metal hull ofthe vessel.

Esta tesis consiste en tres trabajos enfocados al desarrollo de varios sistemas que sean capaces de registrar el movimiento sísmico de la tierra y grabarlo en ficheros para su posterior análisis. Partimos de la base de la creación de una serie de sensores para el registro del ruido sísmico, dispuestos en forma circular y así poder detectar las ondas sismológicas. La hipótesis con la que trabajamos es la de interconectar entre si los nodos sensoriales y de esta manera crear una red sensorial la cual reporte las muestras de ruido sísmico a un servidor y éste sea capaz de mostrar la forma de las señales en tiempo real. Este sistema nos facilitará el almacenamiento y tratamiento de los datos registrados por cada uno de los nodos con la posibilidad de análisis casi instantáneo. Como línea de partida, se ha implementado un sistema de comunicación sensorial a través de una red wifi en la cual se monitoriza en tiempo real un sistema de climatización y se optimiza el consumo de éste regulando distintos factores en función de los valores de los sensores distribuidos por toda el área afectada. Este trabajo ha generado el primer artículo de investigación publicado en la revista Sensors (doi:10.3390/s20133611). El código generado junto con la experiencia, las pruebas realizadas y los resultados obtenidos nos van a servir para los sensores sísmicos. En el segundo trabajo se ha diseñado, implementado y probado un sistema de zonificación mediante una red wireless de sensores triaxiales los cuales son capaces de registrar en tiempo real el movimiento sísmico de edificios y mostrar estas señales en un navegador cliente ubicado en Internet. Este trabajo ha generado el segundo artículo de investigación publicado en la revista Sensors (doi: 10.3390/s21113875). En el tercer y último trabajo se ha diseñado, implementado y probado un sistema de grabación del ruido sísmico en array por medio de una red de sensores wireless. El sistema es capaz de utilizar sensores verticales de 4,5Hz de bajo coste y también sensores triaxiales proporcionando una curva de dispersión cuasi idéntica a los sistemas comeciales actuales pero a un coste mucho menor. Este trabajo ha generado el tercer artículo de investigación publicado en la revista Sensors (doi: 10.3390/s22218103). Este trabajo a dado pie a una solicitud de patente (P202230702).