Sökresultat

Filtyp

Din sökning på "*" gav 550059 sökträffar

Error-correction-based cointegration tests for panel data

This article describes a new Stata command called xtwest, which implements the four error-correction-based panel cointegration tests developed by Westerlund (2007). The tests are general enough to allow for a large degree of heterogeneity, both in the long-run cointegrating relationship and in the short-run dynamics, and dependence within as well as across the cross-sectional units.

Combined ethanol and methane production using steam pretreated sugarcane bagasse

Efficient energy production relies on complementary use of crop residues, to enhance the amount of energy obtained per unit biomass. In this frame, sugarcane bagasse (SB) was pretreated and the resulting slurry and liquid fraction served, respectively, for simultaneous saccharification and fermentation (SSF) at high solid concentration (15%), and anaerobic digestion (AD). More specifically, SB was

The frequency and prognostic impact of dic(9;20)(p13.2;q11.2) in childhood B-cell precursor acute lymphoblastic leukemia: results from the NOPHO ALL-2000 trial

The dic(9;20)(p13.2;q11.2) is reported to be present in similar to 2% of childhood B-cell precursor acute lymphoblastic leukemia (BCP ALL). However, it easily escapes detection by G-banding analysis and its true prevalence is hence unknown. We performed interphase fluorescence in situ hybridization analyses-in a three-step manner-using probes for: (i) CDKN2A at 9p21, (ii) 20p and 20q subtelomeres

A short-lived aeolian event during the Early Holocene in southeastern Norway

The Starmoen dune field is part of a larger aeolian system in the Jomna and Glomma river valleys in southeastern Norway. It is believed to have formed just after the last deglaciation in the area, but no absolute ages have been available to support this. Here, we present a set of quartz optically stimulated luminescence (OSL) ages from the aeolian sediments and the underlying glacifluvial deposits

Every breath you take every move you make. Studies on Asthma and Sports in Adolescent Athletes

Popular Abstract in Swedish Every breath you take – Every move you make Astma och allergier tillhör våra vanligaste folksjukdomar och de har ökat under de senaste fyra decennierna, särskilt bland barn och ungdomar. Under samma period så har inställningen till fysisk aktivitet och olika livsstilsfaktorer i samhället förändrats. Det är allmänt accepterat att fysisk aktivitet är bra for hälsan och viAsthma and allergies are common diseases in adolescents and have increased during the last few decades. All elite level sports activities result in increased risk of asthma and rhinitis regardless of sport practised. Physical activity is at the same time regarded as a health-promoting factor and is recommended both for the prevention and treatment of diseases. The aim of this study was to explore

Clinically Assessed Knee Joint Laxity as a Predictor for Reconstruction After an Anterior Cruciate Ligament Injury: A Prospective Study of 100 Patients Treated With Activity Modification and Rehabilitation.

BACKGROUND: The association of early knee joint laxity with the need for later reconstruction of the anterior cruciate ligament has not been extensively studied. HYPOTHESIS: The grade of knee laxity can be used as an early predictor of the need for later reconstruction. STUDY DESIGN: Cohort study (prognosis); Level of evidence, 2. METHODS: One hundred consecutive patients with an acute arthroscopi

Use of healthcare resources after gestational diabetes mellitus: A longitudinal case-control analysis.

AIMS: To analyse whether gestational diabetes mellitus (GDM) was associated with increases in healthcare utilisation after delivery. METHODS: A longitudinal case-control registry-based study of 579 women with GDM delivered in 1995-2001. Two controls for each case were selected from the Swedish National Board of Health and Welfare, matched for year of birth, year of delivery, and municipality of r

Towards a conceptual framework of place attractiveness: a migration perspective

Abstract in UndeterminedThe attractiveness of places is currently gaining a high policy salience in policymakers’ efforts to draw mobile capital. Yet, while there are a growing number of empirical studies considering the migration of people and the attractiveness of places, there is an acute lack of conceptual understanding of the phenomena that hamper discussions between researchers and policymak

An Information Theoretic Charachterization of Channel Shortening Receivers

Optimal data detection of a linear channel can always be implemented through the Viterbi algorithm (VA). However, in many cases of interest the memory of the channel prohibits application of the VA. A popular and conceptually simple method in this case, studied since the early 70s, is to first filter the received signal in order to shorten the memory of the channel, and then to apply a VA that ope

Comparison of phenomenological and laminate-based models for rate-dependent switching in ferroelectric continua

The purpose of the current work is the comparison of a phenomenological and a laminate-based model for rate-dependent switching in ferroelectric single crystals. To this end, the phenomenological model formulation of [1] is considered. In this model, the polarization vector is treated as an internal variable. The evolution of the polarization determines the remanent strain; dependence of energy st

Shift work to balance everyday life - a salutogenic nursing perspective in home help service in Sweden.

Nurses in Sweden have a high absence due to illness and many retire before the age of sixty. Factors at work as well as in private life may contribute to health problems. To maintain a healthy work-force there is a need for actions on work-life balance in a salutogenic perspective. The aim of this study was to explore perceptions of resources in everyday life to balance work and private life among

CCL2 Is Associated with a Faster Rate of Cognitive Decline during Early Stages of Alzheimer's Disease.

Chemokine (C-C motif) receptor 2 (CCR2)-signaling can mediate accumulation of microglia at sites affected by neuroinflammation. CCR2 and its main ligand CCL2 (MCP-1) might also be involved in the altered metabolism of beta-amyloid (Aβ) underlying Alzheimer's disease (AD). We therefore measured the levels of CCL2 and three other CCR2 ligands, i.e. CCL11 (eotaxin), CCL13 (MCP-4) and CCL26 (eotaxin-3

A guide to central place effects in foraging.

We develop a general patch-use model of central place foraging, which subsumes and extends several previous models. The model produces a catalog of central place effects predicting how distance from a central place influences the costs and benefits of foraging, load-size, quitting harvest rates, and giving-up densities. In the model, we separate between costs that are load-size dependent, i.e. a d

Computationally efficient methods in spatial statistics : Applications in environmental modeling

In this thesis, computationally efficient statistical models for large spatial environmental data sets are constructed. In the first part of the thesis, a method for estimating spatially dependent temporal trends is developed. A space-varying regression model, where the regression coefficients for the spatial locations are dependent, is used. The spatial dependence structure is specified by a Ga

Post-decision consolidation and distortion of facts

Participants decided whom of two patients to prioritize for surgery in three studies. The factual quantitative information about the patients (e.g., probability of surviving surgery) was given in vignette form with case descriptions on Visual Analogue Scales - VAS's. Differentiation and Consolidation theory predicts that not only the attractiveness of facts but also the mental representations of o