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We have investigated terahertz (THz) emission due to dynamical electron transport in wide miniband GaAs/Al0.3Ga0.7As superlattices. By noting that the time-domain THz emission spectroscopy contains the information on the step response of the electron system to the bias electric field, the obtained THz spectra were compared with the high-frequency conductivities predicted for miniband transport. Ex
Increased vascular dilatation and permeability characterize allergic rhinitis. In this study oligonucleotide microarrays (Affymetrix HuGe95A) were used to identify differentially expressed vasoactive genes in nasal biopsies from 23 patients with symptomatic seasonal allergic rhinitis (SAR) and 12 healthy controls. RNA was extracted from the biopsies and pooled in three patient and three control po
This paper presents a calibration technique for massive MIMO base stations, where the frequency responses of the transmit and/or receive analog front-ends are individually estimated and compensated for. Calibration is achieved by a first-round of channel sounding between base station antennas, followed by post-processing and a compensation stage. The proposed technique is general in the sense that
We investigated the vertical distribution, storage, landscape partitioning, and spatial variability of soil amorphous silica (ASi) at four different sites underlain by continuous permafrost and representative of mountainous and lowland tundra, in the circum-Arctic region. Based on a larger set of data, we present the first estimate of the ASi soil reservoir (0-1 m depth) in circum-Arctic tundra te
Identification and relative quantification of hundreds to thousands of proteins within complex biological samples have become realistic with the emergence of stable isotope labeling in combination with high throughput mass spectrometry. However, all current chemical approaches target a single amino acid functionality (most often lysine or cysteine) despite the fact that addressing two or more amin
In 2014, leadership studies saw the retraction of a number of journal articles written by prominent researchers who are closely associated with popular concepts such as transformational leadership, authentic leadership, ethical leadership and spiritual leadership. In response, The Leadership Quarterly published a lengthy editorial that presented these retractions as a sign of health in a mature sc
Hereditary nonpolyposis colorectal cancer (HNPCC) is caused by a germline mutation in one of several DNA repair genes, which in the tumors is reflected as microsatellite instability (MSI). MSI+ tumors have been found to carry somatic frameshift mutations in mononucleotide repeats within the coding regions of several genes involved in growth control, apoptosis, and DNA repair, e.g., TGFBRII, BAX, I
Introduction: Few large studies have examined the heritability of venous thromboembolism (VTE). Moreover, twin studies have been suggested to overestimate heritability. The aim of the present study was to determine the heritability nationwide in the general Swedish population using full siblings and half-siblings. Methods: VTE was defined using the Swedish patient register. Full sibling (FS) and h
Background: Serum creatinine-based estimates of GFR may be inaccurate in the elderly and there is need for improvement. Serum Cystatin C, not being influenced by muscle volume, may be more accurate. Material and methods: GFR was measured with plasma clearance of iohexol in 50 elderly persons aged >70 years. Blood tests were drawn for analysis of creatinine, albumin and urea. Cystatin C was analyse
Context: Test driven development (TDD) has been extensively researched and compared to traditional approaches (test last development, TLD). Existing literature reviews show varying results for TDD. Objective: This study investigates how the conclusions of existing literature reviews change when taking two study quality dimension into account, namely rigor and relevance. Method: In this study a sys
Au nanoparticles (nanoAu) with an average diameter of 60 nm were decorated on the surface of multiwalled carbon nanotubes to prepare MWCNTs-nanoAu nano-hybrids. The MWCNTs-nanoAu nano-hybrids were cast on the surface of a glassy carbon electrode and were then further modified with a layer comprising glucose oxidase and chitosan to fabricate a novel electrochemiluminescence (ECL) glucose biosensor.
Context: The risk of many conditions, including prostate cancer, breast cancer, and osteoporosis, is associated with serum levels of sex steroids. Objective: The aim of the study was to identify genetic variations in sex steroid-related genes that are associated with serum levels of estradiol (E2) and/or testosterone in men. Design: Genotyping of 604 single nucleotide polymorphisms in 50 sex stero
Objectives: To investigate side by side the effects on serum lipoproteins and postprandial glucose and insulin concentrations of beverages enriched with 5 or 10 g of beta-glucans from oats or barley. Design and setting: An 8-week single blind, controlled study with five parallel groups carried out at two centres under identical conditions. Interventions: During a 3-week run-in period all subject
A reduction method is proposed for analysing structure-acoustic and poroelastic-acoustic problems within a finite element framework. This includes systems consisting of an acoustic fluid domain coupled to a flexible structural domain and/or a porous sound absorbing material domain. The studied problem is reduced by dividing the system into a number of physical subdomains. A set of basis vectors is
Historiskt sett har människor byggt sina hus med de material som den omgivande naturen gav. Både vass och lera är två sådana material som förekommer naturligt. Det som bl.a. skiljer dessa material åt är de processer som krävs för att de ska kunna användas som taktäckningsmaterial. Vassen skördas och torkas medan leran bearbetas och bränns för att slutligen bli en användbar produkt. I tidigare svenHistorically, people built their houses with the materials that the surrounding nature gave. Reeds and clay are two such materials occurring naturally. A difference between these materials is the processes required for them to be used as roofing material. Reed is harvested and then dried while the clay is processed and fired to finally become the useful product. In earlier Swedish history roofs we
Korruption är ett begrepp som inte har någon klar definition. Det är många vetenskaper som diskuterar korruption, dock görs detta med delvis olika synvinklar. Denna framställning visar att det finns många olika perspektiv att anlägga på korruptionsproblematiken, perspektiv som dessutom leder till olika slutsatser om problematikens orsaker och verkan. Fler tvärvetenskapliga perspektiv behövs, för aCorruption is a term that has no clear definition. There are many disciplines that discuss corruption, however, this is done with somewhat different perspectives. This essay shows multiple perspectives on corruption issues, perspectives which also lead to different conclusions about the causes and effects of corruption. More interdisciplinary perspectives are needed to be able to work against corr
Denna uppsats ämnar undersöka, analysera och diskutera försvarlighetsbedömningar vid förtal enligt brottsbalken. Uppsatsen söker svaret på hur bedömningen går till samt hur den bör gå till. Undersökningen är begränsad till att omfatta förtal begångna på sociala medier då någon blivit utpekad som brottsling. Uppsatsen avhandlar även aspekten vad som är relevant vid en försvarlighetsbedömning vid föThis paper investigates, analyzes and discusses defense assessments in slander cases, as defined by the Swedish Penal Code. It looks at how assessments currently proceed rela- tive to how they could potentially be handled differently. This survey is limited to cover- ing slander committed on social media when someone has been singled out as a criminal. Our thesis also addresses what is relevant in
Organizational strategists are working on their company’s ability to absorb and transfer knowledge between organizational units, their so-called absorptive capacity, to better react to environmental changes and, hence, strengthen their sustainable competitive advantage. In particular, the sharing of tacit know-how is considered to be difficult because it is contextual and experience-based, and, th
Early-life health shocks can have very serious long-term consequences for those exposed to them, a fact which must be considered when parents make decisions with regards to allocating resources across their children. Here, the 1980 famine in Karamoja, Uganda is used as a natural experiment in which to test whether parental investment responses reinforce or compensate the impacts of early-life shoc
