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The main focus of this paper is the empirical modelling of the wear of carbon brushes. Rather than determining the dominant wear mechanisms, an approach towards the prediction of wear under a range of different conditions was used. The models were obtained by multiple regression analysis using lifetime (LT) data contributed by the biggest European manufacturer of vacuum cleaner motors. This includ
Syftet med denna artikel är att undersöka föreställningar om nedväxtsamhället som ett alternativ till grön tillväxt för att förstå och hantera klimatkrisen. Med utgångspunkt i aktuell tillväxtkritisk forskningslitteratur undersöks hur författare har föreställt sig ett framtida samhälle präglat av nedväxt. Artikelns analytiska ansats är att söka urskilja mönster och tendenser genom en systematisk g
Sustainable supply chain design can be performed using optimisation strategies for minimising environmental impacts while maximising profit. It is not clear how such strategies influence the resilience of a supply chain – its ability to handle disturbances without compromising its function. This research used the ecosystem network analysis (ENA) to evaluate the resilience during the design of a su
The development of the Functional Resonance Analysis Method (FRAM) has been motivated by the perceived limitations of fundamentally deterministic and probabilistic approaches to understand complex systems’ behaviour. Congruent with the principles of Resilience Engineering, over recent years the FRAM has been progressively developed in scientific terms, and increasingly adopted in industrial enviro
History shows that wars can be enormously disruptive of economic activity, especially international trade, national income, and global economic welfare. This article analyzes the impact on the European regions the Russian invasion of Ukraine using the largest and most updated multiregional input-output model for Europe. Two shocks, trade and inflation, and four alternative scenarios are simulated.
This paper discusses the underlying causes behind the masculinization of poverty during the period of 1957–1981 in Sweden. Testable hypotheses are derived from a theoretical framework. The findings suggest that the male role as breadwinner disappeared during the analysed period. Lowly educated men and especially male immigrant labour lost their labour market position when industrial society gave w
The most common cause of autosomal recessive familial Parkinson's disease (PD) are mutations in the PRKN/PARK2 gene encoding an E3 ubiquitin protein-ligase PARKIN. We report the generation of an iPSC cell line from the fibroblasts of a male PD patient carrying a common missense variant in exon 7 (p.Arg275Trp), and a 133 kb deletion encompassing exon 8, using transiently-present Sendai virus. The e
Proximity testing is at the core of several Location-Based Services (LBS). Despite a series of reported and confirmed abuses, modern LBSs still demand their clients to disclose their locations in plain in order to preform location proximity testing. This works aims at enhancing proximity testing with privacy. We design CatNap a novel protocol that (1) implements precise Euclidean distance matching
We demonstrate experimentally nonequilibrium transport in unipolar quasi-1D hot electron devices reaching the ballistic limit at room temperature. The devices are realized with heterostructure engineering in nanowires to obtain dopant- and dislocation-free 1D-epitaxy and flexible bandgap engineering. We show experimentally the control of hot electron injection with a graded conduction band profile
In this paper, we address the multi pursuer version of the pursuit evasion problem in polygonal environments. It is well known that this problem is NP-hard, and therefore we seek efficient, but not optimal, solutions by relaxing the problem and applying the tools of Mixed Integer Linear Programming (MILP) and Receding Horizon Control (RHC). Approaches using MILP and RHC are known to produce effici
Supplier relationships in the automotive industry have changed fundamentally in recent decades owing to trends such as less verticalintegration, global sourcing, simultaneous engineering, and theInternet. Suppliers have become much more important in terms ofboth production and development. The ability to manage engineeringchanges (EC) efficiently and reliably reflects the capability of thewhole su
Laser Plasma Wakefield Accelerated (LWFA) electron beams and efficiency of betatron X-ray sources is studied using laser micromachined supersonic gas jet nozzle arrays. Separate sections of the target are used for the injection, acceleration and enhancement of electron oscillation. In this report, we present the results of LWFA and X-ray generation using dynamic gas density grid built by shock-wav
Lung transplantation is an accepted treatment for end stage lung diseases and performed at two national centers in Sweden - Gothenburg and Lund. Since the start in 1990 over 1 200 patients have been transplanted. The indications are severe progressive lung diseases with short expected survival or severe negative effects on daily life. There are several contraindications among which severe other o
The chapter outlines the main themes that emerge in discussing the futures of cultural heritage tourism in the MENA region. Six main themes are identified. The tensions between the social and economic dimensions of heritage are illustrated in the construction of heritage, especially for international and domestic tourists. These tensions are also to be found in the wat in which heritage is deliber
