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This study presents a novel approach to forming low-resistance ohmic contacts for AlGaN/GaN HEMTs. The optimized contacts exhibit an outstanding contact resistance of approximately 0.15 Ω·mm. This is achieved by firstly recessing the barrier of the heterostructure to a depth beyond the channel. In this way, the channel region is exposed on the sidewall of the recess. The coverage of the Ti/Al/Ti o

Little is know about whether the conditions experienced during ontogeny affect resistance to parasites later in life in wild animals. Here, we used a population of blue tits (Cyanistes caeruleus (L., 1758)) to investigate to what extent conditions experienced during the nestling stage could explain the ability to control blood parasite (Haemoproteus majoris (Laveran, 1902)) infections 1 year later

A key component in low energy houses is the heat recovery from the ventilation air. Over recent years, the most frequently used ventilation type is the mechanical ventilation with heat recovery. This kind of ventilation results in high heat recovery but does unfortunately consume a considerable amount of electrical energy. Natural or hybrid ventilation has the potential to consume less electricity

We study the stability of systems of three giant planets orbiting 3-8 M☉ stars at orbital distances of >10 au as the host star ages through the main sequence (MS) and well into the white dwarf (WD) stage. Systems are stable on the MS if the planets are separated by more than ~9 Hill radii. Most systems surviving the MS will remain stable until the WD phase, although planets scattered on to small p

Here we present a novel approach to the description of the lagged interdependence structure of stationary time series. The idea is to extend the use of copulas to the lagged (one-dimensional) series, to the analogy of the autocorrelation function. The use of such autocopulas can reveal the specifics of the lagged interdependence in a much finer way. However, the lagged interdependence is resulted

BACKGROUND: Palliative care should be provided, irrespective of setting to all patients facing a life-threatening illness and to their families. The situation and needs of older people differ from those of younger people since they often have several co-existing diseases and health complaints. This implies an extensive need for care and for longer periods of palliative care. The main providers of

Backgrounds: The clinical tumor-node-metastasis (T, N and M) classes of breast cancers provide important prognostic information. However, the possible association of TNM classes with reproductive factors has remained largely unexplored. Because every woman has a reproductive history, implications to outcome prediction are potentially significant. Methods: During the study period from 2002 through

Donor-reactive memory T cells mediated accelerated rejection is known as a barrier to the survival of transplanted organs. We investigated the combination of different monoclonal antibodies (mAbs) and donor-specific transfusion (DST) in memory T cells-based adoptive mice model. In the presence of donor reactive memory T cells, the mean survival time (MST) of grafts in the anti-CD40L/LFA-1/DST grou

The purpose of this study was to estimate the financial costs of disability pension in order to compare the financial burden and the numerical distribution of disability pension by main diagnostic groups. During three months all new disability pensions (n = 944) granted in Malmohus county were registered. During a follow-up of approximately two and a half years, 40 subjects died and 15 pensions ex

Music, such as the duration of a musical piece or length of a concert, can me measured by metronomes and clocks in objective time (chronos). However, playing an instrument, singing, attending a concert, listening to a record or reading a musical score are musical activities also experienced as subjective time (kairos). Music has an intrinsic temporal dimension of experienced time, often including

The genomic response following brain ischemia is very complex and involves activation of both protective and detrimental signaling pathways. Immediate early genes (IEGs) represent the first wave of gene expression following ischemia and are induced in extensive regions of the ischemic brain including cerebral cortex and hippocampus. Brain-derived neurotrophic factor (BDNF), Neuritin and Activity-r

1. Wind-damaged trees, following the severe storm of 1999, are compared with data from a 50-year monitoring of Draved Forest, Denmark, to assess differing causes of mortality through time in an unmanaged semi-natural forest. Species-specific mortality characteristics and the changing effects of tree size and growth rate (diameter increment) on mortality through time are also investigated. 2. Storm

Background: Severe perineal trauma sustained during childbirth is a serious complication since it can lead to both short- and long-term consequences for women. Some of the methods used to prevent perineal injuries have been evaluated in clinical trials, but there are still gaps in the evidence. A new clinical practice has been introduced, adopted by more than half of the maternity wards in Sweden

The literature on regional development increasingly recognizes that agency is an essential but understudied factor in processes of regional structural change. However, much like the fundamental debates in social sciences about agency and structure, work in this field has often remained theoretical. Investigating the role of agency in regional economic development, systematically and at the micro-l

Evidence from case-control studies, but less so from cohort studies, suggests a positive association between meat intake and risk of lung cancer. Therefore, this association was evaluated in the frame of the European Prospective Investigation into Cancer and Nutrition, EPIC. Data from 478,021 participants, recruited from 10 European countries, who completed a dietary questionnaire in 1992-2000 wer

The expansion of the electric vehicle industry is driving increased demand for lithium-ion batteries (LIBs), which in turn creates challenges in material availability and waste management that more durable LIBs could address. Electrode surface coating helps extend LIB lifespan, with atomic layered deposition (ALD) as the preferred method due to its precise thickness control and ability to coat var

Detta examensarbete presenterar resultatet av en utredning av ihopspänningen av en packningsförsedd plattvärmeväxlare. Projektets huvudfokus var att hitta en ny metod för att spänna ihop en packningsförsedd värmeväxlare some är mer exakt än den nuvarande metoden. Detta åstadkomms genom att ta hänsyn till tillverkningstoleranserna av de ingående delarna. Andra faktorer som antalet kanalplattor, matThis thesis presents the results of an investigation of the tightening function of a gasketed plate heat exchanger (GPHE). The main focus of the project has been to find a new method for tightening a GPHE that is more accurate than the current method. This is achieved by factoring in manufacturing tolerances of the ingoing parts. Other factors such as the number of channel plates, channel plate ma

This dissertation provides a career perspective on entrepreneurship based on the research question: “How do organizational bureaucracy and relative income affect the career choice of entrepreneurship among employees from the science and technology labor force (STLF); and what are the career outcomes in terms of returns during, and post entrepreneurship on re-entry into paid employment?” More speci

The recently introduced perovskite solar cell (PSC) technology is a promising candidate for providing low-cost energy for future demands. However, one major concern with the technology can be traced back to morphological defects in the electron selective layer (ESL), which deteriorates the solar cell performance. Pinholes in the ESL may lead to an increased surface recombination rate for holes, if