Sökresultat

This paper deals with the estimation of the design force in self-tapping screws used as a reinforcement ofnotched cross laminated timber plates (CLT). With the reinforcement, apart from an increased load-carrying capacity, amore ductile behaviour of this detail can be achieved. An analytical model based on the Timoshenko Beam Theory wasdeveloped, enabling the estimation of the axial force in the r

The paper deals with numerical investigations of load-bearing capacity and fracture behaviour of Cross Laminated Timber at in-plane shear loading. Focus is on shear failure mechanism III, i.e. failure in the crossing areas between flatwise bonded laminations, and on evaluating test methods for that failure mode. In current design provisions, this failure mode is characterised by the rolling shear

The research project Innovative Solutions for Cross Laminated Timber Structures (InnoCrossLam) wasrecently finished. The project aimed at increasing the competitiveness of CLT as a versatile engineered product, byincreasing its predictability in demanding design situations not covered by the guidelines of today, or standards and codesforeseeable in the near future (e.g., second generation of Europ

This paper presents measurement and analysis results for millimeter-wave (mmWave) massive multiple-input multiple-output (MIMO) performance in different real-life scenarios with moderate user equipment (UE) mobility. For the measurement campaign, the developed massive MIMO testbed operating at 28GHz called LuMaMi28GHz is employed. In this testbed, the base station has 16 transceiver chains with a

Reliability is becoming increasingly important for many applications envisioned for future wireless systems. A technology that could improve reliability in these systems is massive MIMO (Multiple- Input Multiple-Output). One reason for this is a phenomenon called channel hardening, which means that as the number of antennas in the system increases, the variations of channel gain decrease in both t

Reliability in Ricean multiple-input-multiple-output (MIMO) channels is crucial for safety related vehicle-tovehicle (V2V) applications. Due to the time variability of vehicular communication channel, it is very significant to study the temporal evolution of channel characterization criteria. We present evaluation results of the temporal evolution of the spectral efficiency from channel sounder me

The COST2100 channel model is a reference channel model which provides dynamic multiple-input multiple-output channel responses for radio system simulations. In this paper, channels created by the COST2100 model were compared to channel measurements in order to understand behaviours of the model. Model parameters of the COST2100 model were derived by dynamic double-directional channel measurements

This paper presents delay spread, coherence bandwidth, and angle-of-arrival statistics derived from an extensive MIMO channel measurement campaign carried out at a central frequency of 2.6GHz. The measurement scenarios include indoor-indoor, indoor-outdoor and indoor-outdoor-indoor. The results are useful for analytical and performance studies of post-3G wireless communication systems such as femt

The paper unpacks the relationship between local culture and agency to enhance our understanding of local variations of agency. The paper studies two former old industrial places in Sweden; one place characterized by an entrepreneurial culture (Borås), the other with a company town culture (Kiruna). Both cases experienced structural crisis around 1970s. A study period of more than 30 years is used

During recent years new threats have accentuated the role of scientific experts for creating risk awareness, understanding, and advice for action or preparedness for informed risk decisions. Scientific experts are expected to engage in risk communication with stakeholders at various levels, not least the general public. Scientific experts exist in organizations where forms and goals may vary, as wDuring recent years new threats have accentuated the role of scientific experts for creating risk awareness, understanding, and advice for action or preparedness for informed risk decisions. Scientific experts are expected to engage in risk communication with stakeholders at various levels, not least the general public. Scientific experts exist in organizations where forms and goals may vary, as w

With a view to working toward urban sustainability goals, two Swedish research platforms, SLU Urban Futures at the University of Agricultural Sciences in Alnarp (SLU) and the Urban Arena at Lund University, launched Urban Forum, a transdisciplinary dialogue format, in 2019. Designed to foster exchange between practitioners and scholars in the spatial design fields the Forum convenes actors from pr

Here we study the influence of particle size on the formation of antiferromagnetic FexO subdomains and the emergence of exchange bias in novel ferrimagnetic Cr-substituted Fe3O4 nanoparticles generated using an aerosol technique based on spark ablation. Cooling in an applied magnetic field across the Néel temperature of the FexO subdomains results in significant shifts in the hysteresis loops, whi

BackgroundThe essential trace elements copper and zinc, and their ratio (copper/zinc), are important for maintaining redox homeostasis. Previous studies suggest that these elements may impact breast cancer survival. However, no epidemiological study has so far been conducted on the potential association between copper and copper/zinc levels and survival after breast cancer diagnosis. In this study

Background: Primary Sclerosing Cholangitis (PSC) is a hepatobiliary disease closely related to ulcerative colitis (UC). In PSC patients, colectomy has been linked to improved prognosis, especially following liver transplantation. This suggests an involvement of the gut-liver axis in PSC etiology. Objective: We aimed to investigate the association between colectomy and the risk of future PSC in an