This master‘s thesis deals with design and realisation of a control module for automated measurements of the modern contactless inductive position sensors by a mechanical rotational system consisting of a DC motor and an incremental quadrature encoder. The thesis presents methods of driving DC motor and recording of measured data by a microcontroller. The thesis presents a communication protocol between the control module and personal computer via USB interface. A part of this thesis is also to develop a control software and firmware, including the measurement and evaluation of properties of the control module.

I detta examensarbete har det undersökts vilken teknik för trådlös kommunikation som passar bäst att användas då en ljudsignal ska strömmas trådlöst till multipla mottagare. De tekniker som jämfördes var Wi-Fi och Bluetooth. Andra tekniker för trådlös kommunikation, ZigBee, ANT+ och NFC, valdes bort för att deras maximala datahastighet eller räckvidd inte var tillräcklig. 3G och 4G valdes bort för att det krävs en licens för att få använda dessa. Som mottagare skulle i första hand Android- och iOS-mobiltelefoner användas. Dessutom har det undersökts vilka komponenter som behövs för att tillverka en prototyp som ska kunna strömma en ljudsignal trådlöst till multipla smartphones. Slutligen gjordes ett kopplingsschema för denna prototyp. Wi-Fi med WLAN-infrastruktur ansågs vara bäst lämpad för denna applikation. Prototypen som skulle strömma ljudsignalen behövde därför kunna fungera som en Wi-Fi-accesspunkt. Wi-Fi-chipet AR9271 från Qualcomm Atheros valdes att användas som Wi-Fi-sändare för att den har open-source firmware och var lättare att få tag på jämfört med andra liknande Wi-Fi-chip. För att kunna använda Wi-Fi-chipets Linuxbaserade open-source firmware valdes SAM9M10 MCU från Atmel att användas som kontrollenhet då denna kan användas med Linux Embedded. För att digitalisera den analoga ljudsignalen valdes VS1063 Mp3-kodare från VLSI Solution. / This thesis has examined which wireless technology that is best suited for use when an audio signal are to be streamed wirelessly to multiple recipients. The technologies that where compared was Wi-Fi and Bluetooth. Other wireless communication technologies, ZigBee, ANT+ and NFC, were excluded because their maximum data rate or range wasn’t sufficient enough. Since it’s required a license to be allowed to use 3G and 4G, these were excluded as well.  As receivers, primarily Android and iOS phones would be used. Furthermore, it has been examined which components that are required for manufacturing a prototype that will be able to stream an audio signal wireless to multiple smartphone’s. Lastly, a circuit diagram for this prototype has been made. Wi-Fi WLAN infrastructure was considered to be best suited for this application. The prototype that would stream an audio signal therefore needed to function as a Wi-Fi access point. AR9271, a Wi-Fi chip from Qualcomm Atheros, was selected to be used as Wi-Fi transmitter because it has an open-source firmware and were easier to come by compared to other similar Wi-Fi chip. To be able to use the Linux-based open-source firmware of the Wi-Fi chip, SAM9M10 MCU from Atmel was selected as control unit since it can be used with Linux Embedded. In order to digitize the analog audio signal, VS1063 MP3 encoder from VLSI Solution was selected.

Formality Style Transfer (FST) is the task of automatically transforming a piece of text from one level of formality to another. Previous research has investigated different methods of performing FST on text in English, but at the time of this project there were to the author’s knowledge no previous studies analysing the quality of FST on text in Swedish. The purpose of this thesis was to investigate how a model trained for FST in Swedish performs. This was done by comparing the quality of a model trained on text in Swedish for FST, to an equivalent model trained on text in English for FST. Both models were implemented as encoder-decoder architectures, warm-started using two pre-existing Bidirectional Encoder Representations from Transformers (BERT) models, pre-trained on Swedish and English text respectively. The two FST models were fine-tuned for both the informal to formal task as well as the formal to informal task, using the Grammarly’s Yahoo Answers Formality Corpus (GYAFC). The Swedish version of GYAFC was created through automatic machine translation of the original English version. The Swedish corpus was then evaluated on the three criteria meaning preservation, formality preservation and fluency preservation. The results of the study indicated that the Swedish model had the capacity to match the quality of the English model but was held back by the inferior quality of the Swedish corpus. The study also highlighted the need for task specific corpus in Swedish. / Överföring av formalitetsstil syftar på uppgiften att automatiskt omvandla ett stycke text från en nivå av formalitet till en annan. Tidigare forskning har undersökt olika metoder för att utföra uppgiften på engelsk text men vid tiden för detta projekt fanns det enligt författarens vetskap inga tidigare studier som analyserat kvaliteten för överföring av formalitetsstil på svensk text. Syftet med detta arbete var att undersöka hur en modell tränad för överföring av formalitetsstil på svensk text presterar. Detta gjordes genom att jämföra kvaliteten på en modell tränad för överföring av formalitetsstil på svensk text, med en motsvarande modell tränad på engelsk text. Båda modellerna implementerades som kodnings-avkodningsmodeller, vars vikter initierats med hjälp av två befintliga Bidirectional Encoder Representations from Transformers (BERT)-modeller, förtränade på svensk respektive engelsk text. De två modellerna finjusterades för omvandling både från informell stil till formell och från formell stil till informell. Under finjusteringen användes en svensk och en engelsk version av korpusen Grammarly’s Yahoo Answers Formality Corpus (GYAFC). Den svenska versionen av GYAFC skapades genom automatisk maskinöversättning av den ursprungliga engelska versionen. Den svenska korpusen utvärderades sedan med hjälp av de tre kriterierna betydelse-bevarande, formalitets-bevarande och flödes-bevarande. Resultaten från studien indikerade att den svenska modellen hade kapaciteten att matcha kvaliteten på den engelska modellen men hölls tillbaka av den svenska korpusens sämre kvalitet. Studien underströk också behovet av uppgiftsspecifika korpusar på svenska.

This thesis evaluates the performance of different machine learning approaches to log classification based on a dataset derived from simulating intrusive behavior towards an enterprise web application. The first experiment consists of performing attacks towards the web app in correlation with the logs to create a labeled dataset. The second experiment consists of one unsupervised model based on a variational autoencoder and four super- vised models based on both conventional feature-engineering techniques with deep neural networks and embedding-based feature techniques followed by long-short-term memory architectures and convolutional neural networks. With this dataset, the embedding-based approaches performed much better than the conventional one. The autoencoder did not perform well compared to the supervised models. To conclude, embedding-based ap- proaches show promise even on datasets with different characteristics compared to natural language.

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Techniques for imposing a structure on the latent space of neural networks have seen much development in recent years. Clustering techniques used for classification have been used to great success, and with this work we hope to bridge the gap between contrastive losses and Generative models. We introduce an embedding loss derived from Triplet loss to show that attributes and information can be clustered in specific dimensions in the latent space of Variational Auto-Encoders. This allows control over the embedded attributes via manipulation of these latent space dimensions. This work also serves to take steps towards the usage of any data augmentation when applying Triplet loss to Variational Auto-Encoders. In this work three different Variational Auto-Encoders are trained on three different datasets to embed information in three different ways using this novel method. Our results show the method working to varying degrees depending on the implementation and the information embedded. Two experiments using image data and one using waveform audio shows that the method is modality invariant. / Tekniker för att införa en struktur i det latenta utrymmet i neurala nätverk har sett mycket utveckling under de senaste åren. Kluster metoder som används för klassificering har använts till stor framgång, och med detta arbete hoppas vi kunna brygga gapet mellan kontrastiva förlustfunktioner och generativa modeller. Vi introducerar en förlustfunktion för inbäddning härledd från triplet loss för att visa att attribut och information kan klustras i specifika dimensioner i det latenta utrymmet hos variationsautokodare. Detta tillåter kontroll över de inbäddade attributen via manipulering av dessa dimensioner i latenta utrymmet. Detta arbete tjänar också till att ta steg mot användningen av olika data augmentationer när triplet loss tillämpas på generativa modeller. Tre olika Variationsautokodare tränas på tre olika dataset för att bädda in information på tre olika sätt med denna nya metod. Våra resultat visar att metoden fungerar i varierande grad beroende på hur den tillämpas och vilken information som inbäddas. Två experiment använder bild-data och ett använder sig av ljud, vilket visar på att metoden är modalitetsinvariant.

High speed analog-to-digital converters (ADCs) used in, e.g., read channel and ultra wideband (UWB) applications are often based on a flash topology. The read channel applications is the intended application of this work, where a part of the work covers the design of two different types of 6-bit flash ADCs. Another field of application is UWB receivers. To optimize the performance of the whole system and derive the specifications for the sub-blocks of the system it is often desired to use a topdown design methodology. To facilitate the top-down design methodology the ADCs are modeled on behavioral level. The models are simulated in MATLAB®. The results are used to verify the functionality of the proposed circuit topologies and serve as a base to the circuit design phase. The first flash ADC has a conventional topology. It has a resistor net connected to a number of latched comparators, but its thermometer-tobinary encoder is based on 2-to-1 multiplexers buffered with inverters. This gives a compact encoder with a regular structure and short critical path. The main disadvantage is the code dependent timing difference between the encoder outputs introduced by this topology. The ADC was simulated on schematic level in Cadence® using the foundry provided transistor models. The design obtained a maximum sampling frequency of 1 GHz, an effective resolution bandwidth of 390 MHz, and a power consumption of 170 mW. The purpose of the second ADC is to demonstrate the concept of introducing dynamic element matching (DEM) into the reference net of a flash ADC. This design yields information about the performance improvements the DEM gives, and what the trade-offs are when introducing DEM. Behavioral level simulations indicate that the SFDR is improved by 11 dB when introducing DEM, but the settling time of the reference net with DEM will now limit the conversion speed of the converter. Further, the maximum input frequency is limited by the total resistance in the reference net, which gets increased in this topology. The total resistance is the total switch on-resistance plus the total resistance of the resistors. To increase the conversion speed and the maximum input frequency a new DEM topology is proposed in this work, which reduces the number of switches introduced into the reference net compared with earlier proposed DEM topologies. The transistor level simulations in Cadence® of the flash ADC with DEM indicates that the SFDR improves by 6 dB compared with when not using DEM, and is expected to improve more if more samples are used in the simulation. This was not possible in the current simulations due to the long simulation time. The improved SFDR is however traded for an increased chip area and a reduction of the maximum sampling frequency to 550 MHzfor this converter. The average power consumption is 92 mW. A goal of this work is to evaluate a 130 nm partially depleted silicon-oninsulator (SOI) complementary metal oxide semiconductor (CMOS) technology with respect to analog circuit implementation. The converters are therefore implemented in this technology. When writing this the ADCs are still being manufactured. Since the technology evaluation will be based on the measurement results the final results of the evaluation are not included in this thesis. The conclusions regarding the SOI CMOS technology are therefore based on a literature study of published scientific papers in the SOI area, information extracted during the design phase of the ADCs, and from the transistor level circuit simulations. These inputs indicate that to fully utilize the potential performance advantages of the SOI CMOS technology the partially depleted SOI CMOS technology should be exchanged for a fully depleted SOI CMOS technology. The manufacturing difficulties regarding the control of the thin-film thickness must however first be solved before the exchange can be done. / <p>Report code: LiU-Tek-Lic-2005:68.</p>

Цель работы – спроектировать и реализовать аппаратную и программную часть учебно-лабораторного комплекса по мехатронике и робототехнике. Определены основные требования к объекту, требования проанализированы, и на их основе разработан комплекс на основе стенда по автоматизированному электроприводу и робота-манипулятора. / The aim of the work is design and implementation the hardware and software parts of the educational unit for mechatronics and robotics education. The basic requirements for the unit have been determined, the requirements have been analyzed, and on their basis a unit that consists of an automated electric drive and a robotic manipulator has been designed.

Объект исследования – процесс изучения автоматизации производственных предприятий. Предмет исследования – дробеметная установка модели 24634Т. Цель работы – разработать проект на модернизацию дробеметной установки 24634Т. В ходе выполнения работы определены основные требования к объекту, требования проанализированы, и на их основе разработан проект на модернизацию. / The object of research is the process of studying the automation of manufacturing enterprises. The subject of the study is the shot blasting unit model 24634T. The aim of the dissertation is to develop a project for the modernization of the shot blasting unit 24634T. In the course of the work, the main requirements were determined, the requirements were analyzed, and on their basis a project for modernization was developed.

Help documents are important in an organization to use the technology applications licensed from a vendor. Customers and internal employees frequently use and interact with the help documents section to use the applications and know about the new features and developments in them. Help documents consist of various knowledge base materials, question and answer documents and help content. In day- to-day life, customers go through these documents to set up, install or use the product. Recommending similar documents to the customers can increase customer engagement in the product and can also help them proceed without any hurdles. The main aim of this study is to build a recommendation system by exploring different machine-learning techniques to recommend the most relevant and similar help document to the user. To achieve this, in this study a hybrid-based recommendation system for help documents is proposed where the documents are recommended based on similarity of the content using content-based filtering and similarity between the users using collaborative filtering. Finally, the recommendations from content-based filtering and collaborative filtering are combined and ranked to form a comprehensive list of recommendations. The proposed approach is evaluated by the internal employees of the company and by external users. Our experimental results demonstrate that the proposed approach is feasible and provides an effective way to recommend help documents.