Sökresultat

Filtyp

Din sökning på "*" gav 534196 sökträffar

Finite element simulation of an AA2024-T3 friction stir weld

This paper presents a three-dimensional sequentially coupled thermo-mechanical analysis of the friction stir welding process suitable for residual stress prediction. A friction stir butt weld of the aluminium alloy 2024 T3 is simulated using finite element analysis. The thermal model includes diffusive heat transfer in the work pieces and that backing plate, convective heat transfer in the work pi

Aerodynamic flight performance in flap-gliding birds and bats.

Many birds use a flight mode called undulating or flap-gliding flight, where they alternate between flapping and gliding phases, while only a few bats make use of such a flight mode. Among birds, flap-gliding is commonly used by medium to large species, where it is regarded to have a lower energetic cost than continuously flapping flight. Here, we introduce a novel model for estimating the energet

Hon får snurr på fysiken

Intervju: "När vi andra ser gungor, rutschbanor och berg- och dalbanor ser Ann-Marie Pendrill mängder av tillfällen att uppleva, prata om och räkna med fysik. – Fysik är ett lekfullt ämne."

Controlling particle morphology and size in the synthesis of mesoporous SBA-15 materials

Plate-like particles of SBA-15 form from smaller units (primary particles) that aggregate in an oriented manner. In this report we influence this aggregation by adding salt to the ongoing synthesis, generating well-ordered hexagonal p6m structure (SBA-15), with varying particle diameters. The additions, with either NaCl or NaI, were made at a time corresponding to the onset of oriented aggregation

Sealed Glass Tube Combustion of mu g-Sized Aerosol Samples

It is important to evaluate each step in radiocarbon analysis to ensure that the whole process is as efficient and accurate as possible. Aerosol filter samples contain a myriad of carbonaceous compounds with varying resistance to oxidation. Complete combustion of the sample is thus of great importance to ensure that the graphitized sample is representative of the original filter sample. We have ev

Serologic Analysis of Returned Travelers with Fever, Sweden

We studied 1,432 febrile travelers from Sweden who had returned from malaria-endemic areas during March 2005-March 2008. In 383 patients, paired serum samples were blindly analyzed for influenza and 7 other agents. For 21% of 115 patients with fever of unknown origin, serologic analysis showed that influenza was the major cause.

Atypical course in severe catatonic schizophrenia in a cannabis-dependent male adolescent: a case report.

Adolescents with psychoses usually have full recovery from their first psychotic episode, but the first relapse often arises within 2 years of the first episode. Cannabis-related psychoses are difficult to distinguish from schizophrenic psychoses. Here, we describe a particularly severe clinical case, with a first psychotic episode occurring after heavy cannabis smoking, an atypically long symptom

Cancer stem cells in tumor heterogeneity.

Cancer cells within a given tumor were long regarded as a largely homogeneous group of cells originating from a common progenitor cell. However, it is increasingly appreciated that there is a considerable heterogeneity within tumors also on the tumor cell level. This heterogeneity extends to virtually all measurable properties of cancer cells, ranging from differentiation state, proliferation rate

Origin of the Bathochromic Shift of Astaxanthin in Lobster Protein: 2D Electronic Spectroscopy Investigation of beta-Crustacyanin

We report on ultrafast spectroscopy study of beta-crustacyanin, the carotenoprotein responsible for the coloration of the lobster shell. beta-Crustacyanin is formed by two closely positioned astaxanthin molecules encapsulated in protein. The 2D electronic spectroscopy together with two-color pump-probe was applied to investigate the electronic structure, the excited-state dynamics, and the influen

Intestinal CD103(+), but not CX3CR1(+), antigen sampling cells migrate in lymph and serve classical dendritic cell functions

Chemokine receptor CX3CR1(+) dendritic cells (DCs) have been suggested to sample intestinal antigens by extending transepithelial dendrites into the gut lumen. Other studies identified CD103(+) DCs in the mucosa, which, through their ability to synthesize retinoic acid (RA), appear to be capable of generating typical signatures of intestinal adaptive immune responses. We report that CD103 and CX3C

Expression and Prognostic Significance of Human Epidermal Growth Factor Receptors 1 and 3 in Gastric and Esophageal Adenocarcinoma.

Gastric and esophageal adenocarcinomas are major global cancer burdens. These cancer forms are characterized by a poor prognosis and a modest response to chemo- radio- and targeted treatment. Hence there is an obvious need for further enhanced diagnostic and treatment strategies. The aim of this study was to examine the expression and prognostic impact of human epidermal growth factor receptor 1 (

Investigations of Diesel Sprays in Optical Engines - Liquid Fuel Penetration and Lift-Off Length

Popular Abstract in Swedish Dieselmotorn lanserades för mer än ett sekel sedan och är nu den mest använda motorn inom Europas transportsektor. Detta beror framför allt på dess låga bränsleförbrukning och höga effekt. Avgasutsläppen är dieselmotorns största nackdel eftersom dessa biprodukter från förbränningen har negativa effekter både på folkhälsan och miljön. Därför regleras utsläppen genom lagsDiesel engines are widely used as powertrain solutions for transportation vehicles. Their low fuel consumption and high performance make them attractive, however, their associated pollutant emissions is a major drawback which represent a hazard for public health and the environment. Therefore, the concentrations of the major pollutant species are regulated. Soot, which to a large extent consists

Impact of soil moisture-climate feedbacks on CMIP5 projections: First results from the GLACE-CMIP5 experiment

The Global Land-Atmosphere Climate Experiment-Coupled Model Intercomparison Project phase 5 (GLACE-CMIP5) is a multimodel experiment investigating the impact of soil moisture-climate feedbacks in CMIP5 projections. We present here first GLACE-CMIP5 results based on five Earth System Models, focusing on impacts of projected changes in regional soil moisture dryness (mostly increases) on late 21st c

Utvärdering av förändring till teambaserat arbetssätt Primärvården Sölvesborg

Rapporten beskriver och utvärderar en förändringsprocess till teambaserat arbetssätt på inom primärvården i Sölvesborg, Landstinget Blekinge. Primärvården i Sölvesborg genomgick en omorganisering under 2008 där man gick från "stuprörs organisering" i professionsbaserade avdelningar till två tvärprofessionella avdelningar som i sin tur är indelade i tvärprofessionella team. Omorganiseringen genomfö