Search results

Filter

Filetype

Your search for "*" yielded 533495 hits

Efficient Wideband mmW Transceiver Front End for 5G Base Stations in 22-nm FD-SOI CMOS

This article presents a fully integrated millimeter-wave (mmW) transceiver front end covering 24.25–29.5 GHz. It features a wideband Doherty power amplifier utilizing adaptive bias and a transmit/receive switch (TRX-switch) that has embedded low noise amplifier to antenna matching. The phase shift of 90 $^\circ$ to the Doherty auxiliary amplifier is achieved using a separate IQ-mixer w

Inverkan av värmeuttag på temperatur- och cirkulationsförhållanden i istäckta sjöar

Three different circulation mechanisms are analyzed: 1) through-flow of a river; 2) wind generated oscillations; and 3) convective currents induced by heat flow from the bottom sediments. The through-flow takes place between the ice and a depth, which is mainly determined by the conditions at the inlet of the river into the lake. Just below this depth there is a sharp thermocline. The water mass b

Performance and emission characteristics of an ammonia/diesel dual-fuel marine engine

This study explores the challenges and possibilities of using ammonia (NH3) as a carbon-free fuel for marine propulsion in a Wärtsilä ammonia/diesel dual-fuel engine using a reactivity-controlled compression ignition (RCCI) concept. The main issues in ammonia RCCI engines are high ammonia slip and high emissions of nitrogen oxides and nitrous oxide. A joint experimental and computational investiga

Vascular smooth muscle–specific YAP/TAZ deletion triggers aneurysm development in mouse aorta

Inadequate adaption to mechanical forces, including blood pressure, contributes to development of arterial aneurysms. Recent studies have pointed to a mechanoprotective role of YAP and TAZ in vascular smooth muscle cells (SMCs). Here, we identified reduced expression of YAP1 in human aortic aneurysms. Vascular SMC–specific knockouts (KOs) of YAP/TAZ were thus generated using the integrin α8–Cre (I

Autumn mass change and winter mass loss differ between migratory and nonmigratory butterflies

Poikilotherms have two major alternative strategies to deal with the inhospitable conditions of temperate winters: hibernation or migration. The vast majority of insects spend winter in a species-specific diapause resting stage, while others remain reproductively active after having migrated to more hospitable environments in the autumn. The butterfly clade Nymphalini offers an interesting possibi

Eye movements in visual impairment

This Special Issue describes the impact of visual impairment on visuomotor function. It includes contributions that examine gaze control in conditions associated with abnormal visual development such as amblyopia, dyslexia and neurofibromatosis as well as disorders associated with field loss later in life, such as macular degeneration and stroke. Specifically, the papers address both gaze holding

A decision support system for watershed flood design purpose in China

The paper presents a computer-based decision support system for watershed planning and flood design purposes including a conceptual rainfall-runoff model. The software package uses up-to-date programing techniques in Windows environment which makes it flexible to handle, adaptable to new areas, and easy to test for different design criteria. The package is suitable for design problems in small as

Movie-ing Forward: Climate Change Narratives and Imaginaries in Children’s Animated Films

Children primarily learn about climate change (CC) through media, including children’s films. Films can influence emotions, shaping perceptions and actions regarding CC. However, research focusing on media narratives consumed by children is lacking, leaving a significant knowledge gap. To bridge this gap, this study employed narrative analysis, examining CC depictions in six children's animate

Life is pain : Fibromyalgia as a nexus of multiple liability distributions

Fibromyalgia is a complex disease of unclear etiology that is complicated by difficulties in diagnosis, treatment, and clinical heterogeneity. To clarify this etiology, healthcare-based data are leveraged to assess the influences on fibromyalgia in several domains. Prevalence is less than 1% of females in our population register data, and about 1/10th that in males. Fibromyalgia often presents wit

Real-time genomics for One Health

The ongoing degradation of natural systems and other environmental changes has put our society at a crossroad with respect to our future relationship with our planet. While the concept of One Health describes how human health is inextricably linked with environmental health, many of these complex interdependencies are still not well-understood. Here, we describe how the advent of real-time genomic

Bland allaktivister och anarkister : en studie av politisk aktivism i Lund 1968–1970.

During the mythical 1968, a left-wing wave swept across the world. New social and political issues took place on the agenda with the hope of a more equal, humanistic and better world. In Sweden, left-wing groups worked in solidarity with the people of the Third World, against the war in Vietnam and for increased democratization. The university city of Lund was no exception. The small Scanian town

Primary filtration of municipal wastewater with sludge fermentation – Impacts on biological nutrient removal

Primary filtration is a compact pre-treatment process for municipal wastewater, which can lead to high removal of total suspended solids (TSS) if polymer is added prior to filtration. Extensive carbon removal with rotating belt filter (RBF) can be combined with filter primary sludge fermentation at ambient temperature, in order to produce volatile fatty acids (VFAs) as carbon source for biological

The impact of policy awareness : Evidence from vehicle choices response to fiscal incentives

Isolating the role of limited knowledge, psychological frictions and policy characteristics is key when evaluating a public program and designing future policies. We document limited awareness about the presence of fiscal incentives towards fuel efficient vehicles. Exploiting a direct measure of awareness at the individual level, we find vehicle choices response heterogeneity to these fiscal incen

Discrimination of Hover Fly Species and Sexes by Wing Interference Signals

Remote automated surveillance of insect abundance and diversity is poised to revolutionize insect decline studies. The study reveals spectral analysis of thin‐film wing interference signals (WISs) can discriminate free‐flying insects beyond what can be accomplished by machine vision. Detectable by photonic sensors, WISs are robust indicators enabling species and sex identification. The first quant

Stereotypes and the public acceptability of shared micromobility

Understanding the public's views and acceptability of shared micromobility (SMM) is crucial for uncovering barriers to incorporating SMM into sustainable urban mobility. This research studies stereotypes of SMM and their impacts on SMM's public acceptability. We focus on shared e-scooters and shared bikes/e-bikes in England, the Netherlands, and Sweden. We conceptualise stereotypes of SMM, develop