Filetype
Automation in aerospace industry is often in the form of dedicated solutions and focused on processes like drilling, riveting etc. The common industrial robot has due to limitations in positional accuracy and stiffness often been unsuitable for aerospace manufacturing. One major cost driver in aircraft manufacturing is manual assembly and the bespoke tooling needed. Assembly tasks frequently invol
An all digital phase-locked loop (ADPLL) has been implemented in a 90-nm CMOS process. It uses a phase frequency detector (PFD) connected to two time-to-digital converters (TDC). To save power the TDCs use uneven delay time in the delay line cells. An automatic tuning bank controller selects active bank of the digitally controlled oscillator (DCO), which features three separate tuning banks. The P
Primordial black holes formed through the collapse of cosmological density fluctuations have been hypothesized as contributors to the dark matter content of the Universe. At the same time, their mergers could contribute to the recently observed population of gravitational-wave sources. We investigate the scenario in which primordial black holes form binaries at late times in the Universe. Specific
This article takes the public sauna at Frihamnen, a post-industrial harbor site in Gothenburg, Sweden, as an object of study in order to discuss the architecturalmonument in the era of the Anthropocene. Designed as a temporary prototype in 2014 by the Berlin based architecture office raumlabor, the building wasrecently granted monument status by the Gothenburg City Council. This article argues tha
The traditional method for recycling brass chips is to send the scrap back to the material manufacturer for re-melting. Alternatively, brass chips can be reclaimed through hot forging operations at the production site. As an initial screening of the environmental impact of this novel reclamation method, the impacts of this new method was compared to conventional brass production (including recycli
The preparation of ultra-thin PtSn-alloyed layers by molecular beam epitaxy was studied using low-energy electron microscopy (LEEM) and micro-diffraction (μ-LEED). Deposition at a sample temperature of 435 °C initially results in the formation of a Pt3Sn/Pt(111) layer showing a (2 × 2) reconstruction. With continued Sn deposition, a Pt2Sn/Pt(111) layer develops, showing a (3×3)R30° reconstruction.
We presented a study of charge-independent (CI) and charge-dependent (CD) two-particle differential number correlation functions R2 and transverse momentum correlation functions P2 in pp collisions at s=2.76 TeV with the PYTHIA and HERWIG models.Calculations were presented for unidentified hadrons in three pT ranges 0.2 < pT≤ 2.0 GeV/c, 2.0 < pT≤ 5.0 GeV/c, and 5.0 < pT≤ 30.0
PurposeThe aim of the present study was to identify the most physically demanding work tasks for Swedish ground combat soldiers through the development and application of a questionnaire survey. This is the first in a series of studies aiming to describe the development process and validation of physical selection standards in the Swedish armed forces.MethodsBased on procedural documentation, comb
We have developed an in-situ method using sonication (3 mm probe sonicator, 30 W, 20 kHz) and auto-reduction (control) to study the mechanism of the formation of manganese dioxide (MnO2) on a solid template (silk film), and its resulting enzymatic activity on tetramethylbenzidine (TMB) substrate. The fabrication of the silk film was first optimized for stability (no degradation) and optical transp
Aims. We study the origin of tail-like structures recently detected around the disk of SU Aurigae and several FU Orionis-type stars. Methods. Dynamic protostellar disks featuring ejections of gaseous clumps and quiescent protoplanetary disks experiencing a close encounter with an intruder star were modeled using the numerical hydrodynamics code FEOSAD. Both the gas and dust dynamics were taken int
This thesis consists of five parts, each of which considers methods based on filter banks for different applications in signal and image processing. In Part I, a non-parametric estimation method is proposed using filter banks to estimate signals with varying waveforms and arrival times. This method, which provides a linear, robust estimate of the signal, is based on a series expansion by a set of
Popular Abstract in Swedish Det finns tre typer av makromolekyler som är grundläggande för allt liv på jorden: DNA, RNA och proteiner. I varje cell i kroppen finns en kopia av vår arvsmassa, DNA. Denna består av gener som avkodas först till RNA och sedan till tiotusentals proteiner. Alla gener är inte aktiva i varje cell eller i varje tidpunkt. Proteiner kontrollerar nästan alla aspekter av det viProteins are complex structures and years of research have been spent on attempts to understand their complexity. The non-covalent interactions involved in protein folding are: hydrophobic effect, electrostatic interactions, van der Waals interactions and hydrogen bonding. It has been of great interest to address the importance of each of those interactions in proteins. While hydrophobic effect is
This paper is a part of a research project studying human interaction with lighting control devices in public indoor environments. Factors such as the perception of the environment or objects may guide human behavior, therefore the perception of lighting related objects may have an impact on the behavior toward energy saving. This paper reports the development of a questionnaire for measuring hu
Although Global Digital Elevation Models (GDEMs) are widely used, their spatial error distributions over extensive regions remain insufficiently understood. Using ICESat-2 Reference Control Points (RCPs) (~ 30 points/km²), this paper not only evaluates GDEMs with point-based metrics such as Root Mean Square Error (RMSE) and Mean Error (ME), but also proposes a novel raster-independent Spatial Erro
Background: There is little agreement on clinically useful criteria for identifying real-world responders to biologic treatments for asthma. Objective: To investigate the impact of pre-biologic impairment on meeting domain-specific biologic responder definitions in adults with severe asthma. Methods: This was a longitudinal, cohort study across 22 countries participating in the International Sever
Aims. DE Boo is a unique system, with an edge-on view through the debris disk around the star. The disk, which is analogous to the Kuiper belt in the Solar System, was reported to extend from 74 to 84 AU from the central star. The high photometric precision of the Characterising Exoplanet Satellite (CHEOPS) provided an exceptional opportunity to observe small variations in the light curve due to t
On 20 June 1810 Stockholm was rocked by a full-blown and violent riot. A funeral precession for the recently deceased crown prince Charles August turned into a furious riot which eventually developed into an attack on the entire existing social order. The marshal of the realm, Axel von Fersen, was killed and large crowds fought during the rest of the day regular street battles against military and
Purpose: The purpose is to map current measures in the main process Supplying and to select those that can be used to support the core process Plan & Secure Supply. Further, recommendations of new suitable measures for Plan & Secure Supply shall be given. Method: This is a qualitative study, mainly based on answers from semi-structured interviews with employees at IKEA. 51 interviews, with
Problem: More information is needed on how a company can overcome hardship during stormy business cycles. Appropriate management strategies on how to get the business going as the dust settles is essential in order for a company to sustain on the market. Management in any recession is difficult, especially in today´s turmoil. Nonetheless, corporate strategic renewal is needed to mitigate the risk
This thesis was constructed between January 8:th and May 30:th in the year 2009 at Lund institute of technology. This will be the master’s thesis of the Master of Science programme in mechanical engineering at Lund institute of technology. Light weight designs are becoming more and more important in the world today. As composite materials are being improved via research, it is possible to repl
