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Realization of a resonant tunneling permeable base transistor with optimized overgrown GaAs interfaces

A resonant tunneling permeable base transistor has been realized experimentally by overgrowing a tungsten grating placed in direct vicinity to a double barrier heterostructure. In this way, we can directly modulate the tunneling current via an embedded gate. Since the quality of the overgrown interface is critical, special attention is paid to this issue, and the effect of different wet etchants p

Not Just Any Water : Hinduism, Ecology and the Ganges Water Controversy

Popular Abstract in Swedish Gangesfloden i Varanasi (Indien) anses samtidigt vara fullkomligt ren och svårt förorenad, beroende på vem som definierar dess egenskaper, brahminska religiösa specialister eller vetenskapligt orienterade miljöaktivister. Medan kontroversen fortgår, försöker några hinduiska religiösa ledare att anpassa sina traditioner till de nya miljöparadigmen, och deras förhållningsWhether the Ganges river in Varanasi (India) is pristinely pure or heavily polluted depends on by whom it qualities are defined, the Brahmin religious specialists in the city or the science oriented environmentalists. While the controversy continues, some Hindu religious leaders are searching for ways to adjust their respective traditions to the environmental paradigms, an initiative that reflects

Correlation between airway responsiveness and proteoglycan production by bronchial fibroblasts from normal and asthmatic subjects.

Asthma is characterized by an airway remodeling process involving altered extracellular matrix deposition such as collagen, fibronectin and proteoglycans. Proteoglycans determine tissue mechanical properties and are involved in many important biological aspects. Not surprisingly, it has been suggested that proteoglycan deposition may alter airway properties in asthma including airway hyperresponsi

A meta-analysis of previous fracture and subsequent fracture risk

Previous fracture is a well-documented risk factor for future fracture. The aim of this study was to quantify this risk on an international basis and to explore the relationship of this risk with age, sex, and bone mineral density (BMD). We studied 15259 men and 44902 women from 11 cohorts comprising EVOS/EPOS, OFELY, CaMos, Rochester, Sheffield, Rotterdam, Kuopio, DOES, Hiroshima, and two cohorts

Semantic and grammatical genders in Swedish – independent but interacting dimensions

The purpose of this article is to outline the basic properties of the gender system in Swedish. I argue that there are two gender dimensions: one grammatical and one semantic. The two systems are independent of each other, but they interact. Crucially, the pronouns den (it.common) and det (it.neuter) can be used both as grammatical and semantic pronouns. The locus of semantic pronouns (as well as

Nature's choice of genes controlling chronic inflammation.

Inflammation is a physiological response that may go uncontrolled and thereby develop in a chronic way. This seems to happen in many common diseases of autoimmune, degenerative, or allergic character. Rheumatoid arthritis (RA) is by definition a chronic disease with an autoimmune inflammatory attack on diarthrodial cartilaginous joints. The development of new treatment neutralizing cytokines invol

Oxytocin mRNA content in the endometrium of non-pregnant women.

Objective To study oxytocin mRNA in the human endometrium at different phases of the menstrual cycle. Design An exploratory study in non-pregnant women. Setting The Department of Obstetrics and Gynecology, Lund University Hospital, Sweden. Participants Thirty-three women of fertile age undergoing hysterectomy or endometrial curettage on routine benign gynaecologic indications. Methods Endometr

Lützen ut ur dimman

Recension av Bo Eriksson,Lützen 1632. Ett ödesdigert beslut och Ingrid Schubert, Lützen. På spaning efter ett minne.

A self-consistent investigation of the semimetal-semiconductor transition in InAs/GaSb quantum wells under external electric fields

We investigate the phase transitions in InAs/GaSb quantum wells sandwiched between two wide-gap AlSb barrier layers under an external electric field perpendicular to interfaces. The Schrodinger and the Poisson equations are solved self-consistently to derive the subband dispersions, the potential profile, the electron charge distribution in the InAs layer, and the hole charge distribution in the G

1980-talets lågenergihus: hur fungerar de efter tio år

Syftet med detta forskningsprojekt är att undersöka hur ett antal väl dokumenterade experimenthus har fungerat under en tioårsperiod. Undersökningen jämför i första hand uppgifter om energianvändning och de driftfrågor som hör till energianvändningen. Vidare har de boendes upplevda inomhusklimat studerats för att kunna se om, och i så fall hur, experimenthusens låga energianvändning har påverkat d

Migration patterns and phenotypic differentiation of long-term expanded human neural progenitor cells after transplantation into the adult rat brain.

We have examined long-term growth-factor expanded human neural progenitors following transplantation into the adult rat brain. Cells, obtained from the forebrain of a 9-week old fetus, propagated in the presence of epidermal growth factor, basic fibroblast growth factor, and leukemia inhibitory factor were transplanted into the striatum, subventricular zone (SVZ), and hippocampus. At 14 weeks, imp

Det extraordinäras lockelse : Luffarturistens bilder och upplevelser

Popular Abstract in Swedish ”Luffarturismen” har blivit en populär form av resande. Många svenskar för under en tid - ibland flera månader eller år - en vagabonderande tillvaro på platser långt hemifrån. Resan blir en parentes i vardagen - en extraordinär sfär fylld av förväntningar på äventyret och den äkta upplevelsen. Vad har resenären för bild av det ”Långtbortistan” hon lockas av, och hur skThis dissertation, The Attraction of the Extraordinary - Images and Experiences Among Backpacker Tourists, is a study based on informal interviews with predominantly Swedish independent travellers, as well as observations and documentary analysis of the backpacker subculture. Backpacking is a type of tourism which has been gradually institutionalized. Through the institutionalization of the backpa