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Beamforming is an important feature of 60 GHz communications. We present an analysis of the influence of beamforming in indoor ultrawideband radio channels measured in the mm-wave 60 GHz band. The performance of narrowband and wideband direction-based beamformers is investigated in terms of improving channel metrics such as the delay spread, excess delay, and the signal-to-noise ratio (SNR). The p
This work studies the design of linear precoder codebooks for N-r x N-t MIMO channels with MMSE detection at the receiver. A natural split of precoder-design is unitary precoding and non-unitary precoding. Unitary precoding is only performing rotation of the data in a way beneficial for the channel. Non-unitary precoding additionally also uses power-loading to further improve the performance. Some
The Knee injury and Osteoarthritis Outcome Score (KOOS) was developed as an extension of the WOMAC Osteoarthritis Index with the purpose of evaluating short-term and long-term symptoms and function in subjects with knee injury and osteoarthritis. The KOOS holds five separately scored subscales: Pain, other Symptoms, Function in daily living (ADL), Function in Sport and Recreation (Sport/Rec), and
Mat är väsentligt för människan och är även en stor del av hennes kultur. Då mat är en så stor del av människans vardag så är det inte konstigt att det även förekommer i det innehåll hon publicerar på sociala medier som Instagram. Vi har myntat begreppet slampig matlagning som innefattar det matinnehåll på internet som likt food porn enbart ska konsumeras med ögonen. Till skillnad från food porn,
Examensarbetets titel: Duktiga flickors bekännelser: En analys av kvinnors upplevelser av stereotypa förväntningar kopplade till könsrollen och chefsrollen. Seminariedatum: 2 juni 2021 Kurs: FEKH49, Examensarbete i organisation på kandidatnivå, 15 hp Författare: Molly Backman, Hanna Elmteg, Lone Engholm Handledare: Nadja Sörgärde Fem nyckelord: Könsroll, chefsroll, double bind, Role Congruity TheoTitle: Confessions of a Good Girl: An Analysis of Women’s Experiences of the Stereotypical Expectations on the Gender Role and the Managerial Role. Seminar date: June 2nd 2021 Course: FEKH49, Business Administration: Bachelor’s Degree Project in Organization, Undergraduate level, 15 credits Authors: Molly Backman, Hanna Elmteg, Lone Engholm Supervisor: Nadja Sörgärde Five Keywords: Gender role, ma
Det här examensarbetet går ut på att göra en konceptstudie och dimensionering av ett handledsverktyg för den snabba materialhanteringsroboten HKM från Cognibotics. Handledsverktyget skall möjliggöra att robotens funktionalitet utökas och breddas. HKM-robotens unika kombination av räckvidd och hastighet i kombination med ett nytt handledsverktyg ger företaget goda möjligheter att etablera sig inom The purpose of this thesis is to perform a conceptual study and dimensioning of a wrist tool for the high-speed material handling robot HKM by Cognibotics. The wrist tool is intended to enhance and broaden the robot's functionality. The unique combination of reach and speed of the HKM robot, in combination with the new wrist tool, gives the company good prospects to establish itself in the log
In computer graphics, there are numerous aspects that must be considered when rendering images of virtual scenes:What physical light-generating phenomena do we care about? How should object and material surfaces be described? And how should these be stored to ensure as fast and efficient image rendering as possible?As a part of this thesis, a method for rendering images of scenes lit by virtual at
While circular economy (CE) discourse emphasises technology-driven solutions and formal systems, cities in the Global South rely on grassroots waste workers (WWs) in the informal sector, who perform essential circular functions through waste collection, sorting, and recycling. In Delhi, informal WWs contribute substantially to material recovery and fill gaps left by formal solid waste management (
We present the open-source software framework in JModelica.org for numerically solving large-scale dynamic optimization problems. The framework solves problems whose dynamic systems are described in Modelica, an open modeling language supported by several different tools. The framework implements a numerical method based on direct local collocation, of which the details are presented. The implemen
We consider the problem of gray-box identification of dynamic models for mechanical systems. In particular, the problem is approached by means of continuous-time system identification using subspace-based methods based on discrete-time input-output identification data. A method is developed, with the property that the structure of the model resulting from fundamental physical first principles is o
A method for determination of polycyclic aromatic hydrocarbons (PAHs) from aerosols was developed. Instead of conventionally used non-polar or slightly polar phenylmethylpolysiloxane column a highly polar, highly substituted, cyanopropyl column (VF-23 MS) was used for separation of PAHs. Based on hollow fiber micro-porous membrane liquid-liquid extraction (HF-MMLLE) a method was developed for samp
Abstract in UndeterminedMinimum distances and maximum likelihood error probabilities of serial turbo codes with uniform interleaver are analyzed. It is shown that, for a fraction of interleavers approaching one as the block-length grows large, the minimum distance of serial turbo codes grows as a positive power of their block-length, while their error probability decreases exponentially fast in so
A major challenge for a person with diabetes is to adapt insulin dosage regimens and food intake to keep blood glucose within tolerable limits during daily life activities. The early knowledge about the effects of inputs on glycemia would provide the patients with invaluable information for appropriate on-the-spot decision making concerning the management of the disease. Against this background, i
Three areas of ongoing research in channel coding are surveyed, and recent developments are presented in each area: spatially coupled Low-Density Parity-Check (LDPC) codes, non-binary LDPC codes, and polar coding.
Correlation coefficient, as a critical performance metric of multiple antenna systems, can be calculated from the 3D radiation patterns of the antennas for multipath environments with uniform 3D angular power spectrum. A simpler, faster and lower cost approach uses the antennas’ scattering parameters to determine correlation coefficient. However, the method assumes lossless antennas, and hence onl
Industrial robots are usually programmed to follow desired trajectories, and are very good at position-controlled tasks. New applications, however, often require physical contact between the robot and its environment, and then the position control accuracy is generally not sufficient. Force control is a suitable alternative. The environment is often stiff, and then it is crucial to design appropri
Open Source Software (OSS) created a paradigm shift within the software engineering field prompting further research to understand how mature, industry grade, software can be produced in an online milieu with distributed and lightly managed developers contributing source code in their free time. The OSS has become also a major revenue generator for many commercial organizations, and has found its
There has been extensive research about single link multiple-input multiple-output (MIMO) channels, both simulated and measured, but only a few studies have targeted multilink analysis with measured channel data. Hence, in this presented report, the authors analyse the influence of spatial separation of user terminals and the human shadowing effect on the MIMO capacity and on the signal-to-interfe
