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A low-latency and area-efficient FFT/IFFT scheme is presented. The main idea is to utilize OFDM guard bands to reduce the operation counts and processing time, which results in 42% latency reduction compared to the reported pipelined schemes. To realize this idea, a modified pipelined architecture and an efficient data scheduling scheme are proposed. Furthermore, the proposed architecture is scala
An important part of responsible business practices is compliance with the law. This article details what actually happens when the laws of the host country fail to ensure adequate protection. The focus here is on land dispossession and loss of livelihood in relation to a gold mine project in central Ghana. How is it that a well-known international company—Newmont—with its own corporate social res
As the Internet of Things (IoT) era emerges the need for ultra-low power (ULP) devices is becoming more eminent. A research-proven approach to achieve ULP consumption is to aggressively lower the supply voltage (VDD) below or in the vicinity of the transistor threshold voltage (Vth) and operate the transistors in the subthreshold (sub-Vth) region. Operating below or near the threshold voltage, i.eAs the Internet of Things (IoT) era emerges the need for ultra-low power (ULP) devices is becoming more eminent. A research-proven approach to achieve ULP consumption is to aggressively lower the supply voltage (VDD) below or in the vicinity of the transistor threshold voltage (Vth) and operate the transistors in the subthreshold (sub-Vth) region. Operating below or near the threshold voltage, i.e
In massive multiple-input multiple-output (MIMO) systems, the large size of channel state information (CSI) matrix significantly increases the computational complexity of uplink detection and size of required memory to store the channel data. To address these challenges, we propose to perform detection in the angular domain, where the channel information can be presented in a more condensed way. T
Sedan 1895 har det inom aktiebolagsrätten funnits bestämmelser om tvångslikvidation på grund av kapitalbrist. Det övergripande syftet med bestämmelserna är att sätta upp gränser för hur långt en förlustbringande verksamhet får fortsätta innan verksamheten måste avbrytas genom likvidation. Bestämmelserna innebär att styrelsen har en skyldighet att agera i ett antal situationer. Styrelsen ska, när dSince 1895 there have been provisions regarding compulsory liquidation due to capital deficiency in Swedish company law. The general purpose of the provisions is to set limits on how far a loss-making activity may continue before the activity has to be interrupted by liquidation. The provisions provide that the board of directors has a duty to act in a number of situations. The board of directors
This thesis explores the potential of broadening the scope of social movements for sustainability. The implicit assumptions of the causal mechanisms for strategic social change propose limits to what transformative social action can be, and risk overlooking untapped resources for change. To address these limitations I use Habermas’ critical social theories on public engagement, systemic rationalit
The age of parallelism is here. For a sustainable software development for massively parallel architectures the von Neumann model need to be replaced by one with native support for parallelism. We suggest a data flow model for signal processing applications. This will make it possible to reuse software implementations for different targets and future platform generations. We also outline our devel
Can simple systems be regulated by simple controllers? Engineering experience indicates that this is often the case. Certainly, the overwhelming majority of industrially deployed controllers are proportional-integral-derivative (PID) controllers, many of which are tuned without detailed models. This is often in disappointing contrast with the controllers produced using model-based approaches. This
In this paper, we present a global solution to a nonlinear H-infinity optimal control problem for control-affine systems with an associated potential function. We also give a closed-form expression for an optimal controller and demonstrate its potential for sparsity. This paper thus advances a recent result which considers the same problem restricted to systems with symmetric state matrix and nonl
This article discusses the reconfiguration of citizenship education in the Swedish Boy Scout movement, one of the country’s largest civil society organizations, after 1945. Citizenship education was a core feature of scouting since its establishment during the first decades of the twentieth century, with patriotism and practical helpfulness as core tenets. Additionally, an emphasis on hiking and c
In modern industrial settings with small batch sizes it should be easy to set up a robot system for a new task. Strategies exist, e.g. the use of skills, but when it comes to handling forces and torques, these systems often fall short. We introduce an approach that provides a combination of task-level planning with targeted learning of scenario-specific parameters for skill-based systems. We propo
Post hoc interventions rely on having access to certain personal data - such as the gender, age, ethnicity, and sexual orientation of the persons being evaluated - in order to detect and correct for prejudice. This brings these interventions into possible tension with pertinent data protection legislation, which might restrict the processing of said data. We discuss the compatibility of post hoc i
We investigate the problem of low-complexity, high-dimensional channel estimation with beamspace observations, for the purpose of localization. Existing work on beamspace ESPRIT (estimation of signal parameters via rotational invariance technique) approaches requires either a shift-invariance structure of the transformation matrix, or a full-column rank condition. We extend these beamspace ESPRIT
Background: In recent years, a discourse on how to systematically consider and report threats to validity started to gain momentum within the empirical software engineering community. Aims: With this study, we aim to systematically underpin the current state of threats to validity practices in software engineering research. Method: We conduct a literature review comprising 91 papers awarded with t
This thesis concerns control of capacity-constrained networks. These systems involve many agents interconnected by a resource distribution network. The capacity to generate and distribute this resource is constrained. This applies, for instance, to power grids, communication networks, smart surveillance camera networks, and district heating networks. District heating networks in particular are the
In the rapidly advancing domain of autonomous vehicle technology, the management of intersection traffic emerges as a demanding challenge. This paper describes the development and implementation of a novel testbed designed for the investigation of an autonomous intersection management system (AIMS). The research primarily focuses on the complex coordination required among autonomous vehicles for e
