Fak. 4 Elektrotechnik und Informatik

1662 Items

Recent Submissions
Development of hands-free interaction techniques and alternative computer access solutions for people with motor-neuron impairments

Esiyok, Cagdas (2020)

In our increasingly digitalized world, computers have become indispensable tools by offering several useful services in many aspects of life such as communication, education, commerce, health, social interaction, and entertainment. Unfortunately, most people with motor-impairments have difficulties to access such services because conventional input devices are not concertedly designed for them....

Laser logic state images of masked AES implementations from registers on a Cyclone IV FPGA

Krachenfels, Thilo (2020-09-03)

This repository contains images (in Tiff format) that were captured using the Phemos-1000 failure analysis microscope with the LLSI (Laser Logic State Imaging) technique. Each image contains 16 bits stored in the registers of a Xilinx Cyclone IV FPGA. Furthermore, the repository contains scripts (in Matlab programming language) for extracting the bit values from the images. This data package is...

Dari Dataset for Coreference Resolution

Zia, Ghezal Ahmad Jan (2020-09-08)

DariCoref, a Dari corpus annotated for anaphoric relations, where all documents are collected from Dari VOA and Azadi Radio. The annotation scheme follows the OntoNotes and WikiCoref. Each markable annotated with coreference type (Identical, Attributive, and Copular), and mention type (Named Entity, Noun Phrase, and Pronominal). Since this is the first annotation efforts concentrate on very spe...

Computing in the Blink of an Eye: Current Possibilities for Edge Computing and Hardware-Agnostic Programming

Ghasemi, Mohammad Hossein ; Lucía, Oscar ; Lucia, Sergio (2020-02-28)

With the rapid advancements of the internet of things, systems including sensing, communication, and computation become ubiquitous. The systems that are built with these technologies are increasingly complex and therefore require more automation and intelligent decision-making, while often including contact with humans. It is thus critical that such interactions run smoothly in real time, and t...

Design and performance analysis of integrated focusing grating couplers for the transverse-magnetic TM00 mode in a photonic BiCMOS technology

Georgieva, Galina ; Voigt, Karsten ; Peczek, Anna ; Mai, Christian ; Zimmermann, Lars (2020-04-08)

Focusing grating couplers for the excitation of the fundamental transverse-magnetic (TM) mode in integrated silicon photonic waveguides are designed and characterized under the boundary conditions of a photonic BiCMOS foundry. Two types of waveguide geometries are considered – a nanowire and a rib waveguide. Wafer-scale experimental results for nanowire TM grating couplers are in excellent agre...

Towards secure 4G and 5G access network protocols

Shaik, Altaf (2020)

The security architecture of 2G and 3G mobile networks has been dramatically improved to accommodate 4G (Fourth Generation, a.k.a Long Term Evolution (LTE)) security requirements. As generations evolve, security improvements address previously known vulnerabilities, esp. in terms of user privacy. Thus, there have been substantial efforts to protect user plane traffic by using robust encryption ...

A Deep Multi-Attention Driven Approach for Multi-Label Remote Sensing Image Classification

Sumbul, Gencer ; Demir, Begüm (2020-05-19)

Deep learning (DL) based methods have been found popular in the framework of remote sensing (RS) image scene classification. Most of the existing DL based methods assume that training images are annotated by single-labels, however RS images typically contain multiple classes and thus can simultaneously be associated with multi-labels. Despite the success of existing methods in describing the in...

Optimal control of timed event graphs with resource sharing and output-reference update

Schafaschek, Germano ; Hardouin, Laurent ; Raisch, Jörg (2020-07-03)

Timed event graphs (TEGs) are a subclass of timed Petri nets that model synchronization and delay phenomena, but not conflict or choice. We consider a scenario where a number of TEGs share one or several resources and are subject to changes in their output-reference signals. Because of resource sharing, the resulting overall discrete event system is not a TEG. We propose a formal method to dete...

Design and comparison of two brushless DC drives for an electric propulsion system of solar-power unmanned aerial vehicles

Dong, Rong (2020)

The electrical propulsion system as the core component of solar-power Unmanned Aerial Vehicles (UAVs) for long duration flight requires high power density and stable drive technology. Brushless DC motors (BLDCM) with high power and torque density and control algorithms suitable for drive system are given preference for the application in UAVs. This dissertation is aimed at designing an improve...

The neurophysiology of EEG and the physics of the head

Miklody, Daniel (2020)

Neuroscientific research using Electroencephalography is one of the most important tools for understanding human brain function and dysfunction. Not many other methods can non-invasively and directly access neural activity with millisecond precision. While basic event related modulations of brain activity can easily be replicated, the spatial resolution remains poor. Thus, complex or higher bra...

Exploring density functional subspaces with genetic algorithms

Gastegger, Michael ; González, Leticia ; Marquetand, Philipp (2018-12-14)

We use a genetic algorithm to explore the subspace of combination and parametrization patterns spanned by a set of popular exchange and correlation functional approximations. Using the well-balanced GMTKN30 benchmark database to guide the evolutionary process, we find that the genetic algorithm is able to recover variants of several popular generalized gradient approximation functionals and hyb...

Combining SchNet and SHARC: The SchNarc Machine Learning Approach for Excited-State Dynamics

Westermayr, Julia ; Gastegger, Michael ; Marquetand, Philipp (2020-04-20)

In recent years, deep learning has become a part of our everyday life and is revolutionizing quantum chemistry as well. In this work, we show how deep learning can be used to advance the research field of photochemistry by learning all important properties—multiple energies, forces, and different couplings—for photodynamics simulations. We simplify such simulations substantially by (i) a phase-...

Machine learning enables long time scale molecular photodynamics simulations

Westermayr, Julia ; Gastegger, Michael ; Menger, Maximilian F. S. J. ; Mai, Sebastian ; González, Leticia ; Marquetand, Philipp (2019-08-05)

Photo-induced processes are fundamental in nature but accurate simulations of their dynamics are seriously limited by the cost of the underlying quantum chemical calculations, hampering their application for long time scales. Here we introduce a method based on machine learning to overcome this bottleneck and enable accurate photodynamics on nanosecond time scales, which are otherwise out of re...

Integrale dielektrische Diagnose von dreifach-extrudierten VPE-isolierten Mittelspannungskabeln

Frübing, Georg (2020)

Die vorliegende Arbeit beschäftigt sich mit der Diagnose von Alterungserscheinungen bei VPE-isolierten 20kV-Mittelspannungskabeln, welche den Anforderungen der DIN VDE 0276-620 genügen. Die Untersuchungen zu Alterungserscheinungen konzentrieren sich dabei auf den Vorgang des Water Treeing. Die Diagnosegrößen sind der Verlustfaktor (seine Frequenzabhängigkeit bei 2kV im Bereich von 10mHz bis 100...

Times Are Changing: Investigating the Pace of Language Change in Diachronic Word Embeddings

Brandl, Stephanie ; Lassner, David (2019-08-02)

We propose Word Embedding Networks, a novel method that is able to learn word embeddings of individual data slices while simultaneously aligning and ordering them without feeding temporal information a priori to the model. This gives us the opportunity to analyse the dynamics in word embeddings on a large scale in a purely data-driven manner. In experiments on two different newspaper corpora, t...

On the perspectives of SiC MOSFETs in high-frequency and high-power isolated DC/DC converters

Eial Awwad, Abdullah (2020)

Increasing demand for efficiency and power density pushes Si-based devices to some of their inherent material limits, including those related to temperature operation, switching frequency, and blocking voltage. Recently, SiC-based power devices are promising candidates for high-power and high-frequency switching applications. Today, SiC MOSFETs are commercially available from several manufactur...

Dari Dataset for Named Entity Recognition DariNER2

Zia, Ghezal Ahmad Jan (2020-08-08)

DariNER2 is the release of the Dari sentence-level Named Entity annotated dataset, collected from Dari Azadi Radio. The goal of the project was to annotate a corpus comprising various genres of text (news, newsgroups, and interviews) in the Dari language with structural information (syntax). In addition, it is developed to support sentence-level ambiguity in the Dari text. It contains 883 sent...

Design and Implementation of centralized signal processing low latency massive MIMO SDR systems

Benzin, Andreas Florian (2020)

The following thesis presents a full digital massive MIMO (multiple-input and multiple-output) sub-6GHz cellular base station design and implementation which is capable of performing low latency zero forcing precoding on a single central field programmable gate array (FPGA) unit. The central signal processing single FPGA architecture reduces system size, complexity, power consumption, algorithm...

Dari Language Stopword Lists

Zia, Ghezal Ahmad Jan (2020-08-03)

The following is a list of stop words that are collected from books and newspapers that all follow Dari pure orthographic structure. These are frequently used in the Dari language but do not carry meaningful information for some language modeling tasks. This list of words reduces the noise in textual data and is excluded from the analysis. We always welcome, if you have any idea to change or su...

MM-wave RF-MEMS switches in SiGe BiCMOS technologies

Tolunay Wipf, Selin (2020)

In the last decade, silicon germanium (SiGe) bipolar complementary metal oxide semiconductor (BiCMOS) technologies opened a new cost-efficient market for the mm-wave applications. Starting with the commercial use of automotive radars at 77 GHz, the market now has a strong interest on radar, sensor and imaging products at mm-wave and sub-THz frequencies. The latest developments on SiGe hetero bi...