Semi-supervised Energy Disaggregation Framework using General Appliance Models

Providing detailed appliance-level energy consumption information helps consumers to understand their usage behavior and encourages them to optimize their energy usage. Non-intrusive load monitoring (NILM) or energy disaggregation aims to estimate appliance-level energy consumption data from the aggregate consumption data of households. NILM...

Improving the video streaming backend with on-the-fly format conversion and cloud storage

Online advanced media streaming services using HTTP adaptive stream-<br/>ing are increasingly popular. However in practice, the multi-protocol, multi-<br/>format nature of adaptive streaming creates a lot of engineering eort and<br/>costs for the operators, in the storage and preparation of the dierent<br/>formats. In this work, we acknowledge...

Analysing the Performance and Stability of LED-to-Camera Links

Recently, Visible light communication systems have been gaining the interest of the research community due to their great potential for creating high-speed data links and providing an alternative to the crowded radio spectrum. As smartphones have become an integral part of life, it would be great if visible light communication could provide...

Sensing human activity with dark light

Nowadays, 19% of the global energy consumption is used for lighting. For this reason, saving energy in lighting is vital. A simple way to save energy is to “simply” turn the lights off, or reduce the amount of light used when nobody is around. This thesis proposes a new method for luminaires to detect the presence of humans and objects which...

Channel Analysis for Passive Communication with Ambient Light

The idea of the internet of things (IoT) states that devices with embedded electronics will outnumber the devices operated by humans. All those "things" will require connectivity to exchange information gathered from processed sensor data. A large part of the data will be sent through the air, such that mobile devices can be deployed without a...

Swarm Behaviour for the Zebro Robot

Nature has found many interesting solutions to similar problems that we face with robots. Swarming in robotics is an interesting field to reduce cost and risk, and provide a scalable solution to certain problems. The Zebro Project of the TU Delft performs research in the field of swarm robotics using the six legged robot, called a Zebro. Swarm...

Embedded Real Time Partial Discharge Pulse Feature Extraction

Partial Discharges(PD) are commonly produced in defects within the insulation systems of high voltage equipment. These discharges are typically nanosecond current pulses in the amplitude range of milli-amperes. A long term exposure of the insulation system to these partial discharges accelerate the aging mechanisms that eventually lead to the...

Performance Evaluation of a Software-Defined Wireless Sensor Network

Software-Defined Networking (SDN) potentially can improve the flexibility and management of Wireless Sensor Networks (WSNs). To investigate the impact of SDN on WSN, in this thesis, we consider three Software-Defined Wireless Sensor Network (SD-WSN) frameworks, namely SDN-WISE, SDWN-ONOS, and TinySDN. After comparing these frameworks, the...

GPU based image registration

Currently, non-rigid image registration algorithms are too time intensive to use in time-critical applications. To solve this problem, stochastic gradient descent (SGD) has been implemented in image registration. But, SGD depends on manual step size selection which is dicult and time consuming. To avoid such manual selection, SGD has been...

Performance Evaluation of LoRaWAN: From Small-Scale to Large-Scale Networks

The uprising of Long Range (LoRa) technology for Low-Power Wide Area Network (LPWAN) has gained popularity in IoT applications. As LoRa utilizes the license-free ISM-bands, many network providers have deployed their LoRa networks that adhere to the LoRaWAN specification. With so many deployed networks, it is likely that devices belonging to...

Integration of V2H/V2G Towards Effective Demand-Response Programs

Increasing adoption of EVs in the next few decades is going to present new challenges such as EV charging creating a new and significant demand on the grid. The purpose of this thesis is to create a system that intelligently schedules the charging of EVs while considering the cost of energy and the discomfort of the user. At any given moment, 90...

Pulse-Based Modulation for VLC Systems: Using Programmable Systems-on-Chip

The use of Light Emitting Diodes (LED) as a main source of illumination<br/>can help in significantly reducing global energy conspumtions. The LED is<br/>well suited for modulating visible light, enabling a wireless communication<br/>channel. A popular topic in Visible Light Communication (VLC) research<br/>is to push data throughput past the...

Design and implementation of a LoRa based Gateway

The project focuses on the hardware-software co design of a LoRaWAN based industrial IoT gateway used for proprietary applications. Long Range Wide Area Network, abbreviated as LoRaWAN is a network and data layer running over the LoRa PHY layer which operates at 868 MHz[29]. The surge in LoRa has led big market players like SemTech to licence...

Pathological Tremor Detection From Video

A pathological tremor is an involuntary and periodic motion of a body part. The detection and quantification of a pathological tremor are essential for diagnosis and therapy. The goal of this research is to detect the frequency of the pathological tremor. Instead of detecting tremors by using a specific medical device, we propose a new...

A System-Level Aging and Mitigation Assessment Simulation Framework

As technology scaling enters the nanometer regime, device aging effects cause quality and reliability issues in CMOS Integrated Circuits (ICs), which in turn shorten its lifetime. Evaluating system aging through circuit simulations is very complex and time consuming. In this thesis, a framework is proposed, which allows for the evaluation of...

Energy-Efficient Electricity-Meter Monitoring

With the arrival of smart electricity meters energy consumption can be monitored continuously and displayed on external devices such as phones or tablets. As a consequence, users become more aware of their energy usage which may result in a reduction in energy consumption. Nevertheless, many countries in Europe still use an analog electricity...

WipLoc: Perpetual Indoor Localization with RF Wireless Power Transfer

Indoor localization is a topic that has been investigated for more than a decade. Yet, no single system exists that is widely adopted as the de facto localization standard. From a research perspective the goal is to obtain a solution that is general, simple and accurate. As the number of devices in the Internet of Things grow, a new set of...