Search results

Filter

Filetype

Your search for "*" yielded 526995 hits

Impact of protease and lipase activities on quality of Swedish raw milk

An increasing demand for dairy products with long shelf-life is foreseen. A limiting factor for maintaining high quality of these products is the activity of spoilage enzymes during storage. Lipase and protease activities in Swedish raw milk at farm and dairy level were investigated, analysing milk samples from three geographical regions and two seasons. Lipase activity in milk at farm level was a

On neural network modeling to maximize the power output of PEMFCs

Optimum operating conditions of a fuel cell will provide its maximum efficiency and the operating cost will be minimized. Thus, operation optimization of the fuel cell is essential. Neural networks can simulate systems without using simplifying assumptions. Therefore, the neural network can be used to simulate complex systems. This paper investigates the effects of important parameters, i.e., temp

Consistent boundary conditions for PDE filter regularization in topology optimization

Design variables in density-based topology optimization are typically regularized using filtering techniques. In many cases, such as stress optimization, where details at the boundaries are crucially important, the filtering in the vicinity of the design domain boundary needs special attention. One well-known technique, often referred to as “padding,” is to extend the design domain with extra laye

The Swedish National Pediatric Cataract Register (PECARE) : incidence and onset of postoperative glaucoma

Purpose: The aim was to report cumulative incidence and time of onset of postoperative glaucoma in a paediatric early cataract surgery cohort. Methods: Data were retrieved from the Pediatric Cataract Register (PECARE), a prospective register of Swedish cataract operations before 8 years of age. All eyes with surgery between January 2007 and December 2014 and a registered follow-up were included. C

Expediting finite element analyses for subject‐specific studies of knee osteoarthritis : A literature review

Osteoarthritis (OA) is a degenerative disease that affects the synovial joints, especially the knee joint, diminishing the ability of patients to perform daily physical activities. Unfortunately, there is no cure for this nearly irreversible musculoskeletal disorder. Nowadays, many researchers aim for in silico‐based methods to simulate personalized risks for the onset and progression of OA and ev

Contributions to molecular phylogeny of lichens 3. • New monophyletic branches of the Trapeliaceae and Xylariaceae

Seven new genera, i.e. Brianiopsis for the former ‘Lambiella’ impavida group, Farkasiella for the former ‘Trapeliopsis’ aeneofusca group, Gallowayiopsis for the former ‘Trapelia’ collaris group, Kleopowiella for the former ‘Trapelia’ placodioides group, Trapegintarasia for the former ‘Trapelia’ lilacea group, Trapejamesia for the former ‘Trapelia’ corticola branch, as well as Xyloelixia for the fo

Crystal structures of two self-hydroxylating ribonucleotide reductase protein R2 mutants : Structural basis for the oxygen-insertion step of hydroxylation reactions catalyzed by diiron proteins

The R2 protein of ribonucleotide reductase catalyzes the dioxygen- dependent one-electron oxidation of Tyr122 at a diiron-carboxylate site. Methane monooxygenase and related hydroxylases catalyze hydrocarbon hydroxylation at diiron sites structurally related to the one in R2. In protein R2, the likely reaction site for dioxygen is close to Phe208. The crystal structure of an iron ligand mutant R2,

Recurrent risk of hospitalization among older persons with problematic alcohol use: A multiple failure-time analysis with a discontinuous risk model

Background and AimsOlder persons with problematic alcohol use vary in psychosocial functioning, age of onset for problem drinking and use of other drugs. The study measured the differential risks of all-cause, alcohol, polydrug and psychiatric-related repeated hospitalizations among older persons with problematic alcohol use.DesignA linked register-based cohort study with discontinuous multiple-fa

The Meridian S01E05 : Neutrons at ESS during Future Week

It is Future Week at Lund University as we release our fifth podcast episode. This week Nic and Rebecca have invited Joanna Lewis to the mic and chat with her about the European Spallation Source, which is under construction here in Lund . Thereafter they take a closer look at SN1572.

Centre–periphery contestation and the spatialization of Covid-19 discourse in Norway

This paper examines how and why the Norwegian government’s early handling of the Covid-19 pandemic became constructed as a centre–periphery issue in public discourse. By analysing opinion pieces and editorials published in a North Norwegian regional newspaper during the first months of the outbreak, it identifies how a ‘northern peripherality’ discourse emerged and highlighted geographical, infras

The Meridian S02E03 : Instrumentation & an Aussie encounter

In this third episode of the second season Nic and Rebeca chat about equality in science before inviting Nikolai Piskunov to the microphone. Nikolai is a professor at the Department of Physics and Astronomy at Uppsala University. He was visiting Lund Observatory to give a talk about high-resolution transit spectroscopy and graciously agreed to make an appearance on the podcast.This season we are a

The Meridian S02E05 : New insights into Venus' past & an erupting volcano

Michael Way works at the NASA Goddard Institute for Space Studies where he is modeling planetary atmospheres, with a special interest for Venus and its history. He was visiting Lund Observatory to give a talk at the Källén Seminars for Young Astronomers recently, and we invited him onto the podcast to ask him if there is a chance that Venus has ever been habitable (Spoiler: the answer is 'yes'). I

Managing an altered social context—Patients experiences of staying away from home while undergoing proton beam therapy

Aim: To illuminate the experience of an altered social context for patients with primary brain tumours living away from home while undergoing proton beam therapy. Design: A descriptive, qualitative cross-sectional interview study. Methods: Nineteen patients were interviewed between December 2015–August 2016, either during (N = 7) or before and after (N = 12) their proton beam therapy. A hermeneuti

The HepMC3 event record library for Monte Carlo event generators

In high-energy physics, Monte Carlo event generators (MCEGs) are used to simulate the interactions of high energy particles. MCEG event records store the information on the simulated particles and their relationships, and thus reflect the simulated evolution of physics phenomena in each collision event. We present the HepMC3 library, a next-generation framework for MCEG event record encoding and m

Extraterrestrial transitions : Desirable transport futures on earth and in outer space

Transport is frequently cited as one of the most expedient means by which humankind affects Earth's ecosystem. Indeed, as underscored by the Anthropocene proposition, transport-related impacts are significant to the point of resulting in alterations of the planet's geological structure. Rising awareness of such issues has led to increasing attention on the priority of achieving a radically decarbo

The role of microscale solid matrix compressibility on the mechanical behaviour of poroelastic materials

We present the macroscale three-dimensional numerical solution of anisotropic Biot's poroelasticity, with coefficients derived from a micromechanical analysis as prescribed by the asymptotic homogenisation technique. The system of partial differential equations (PDEs) is discretised by finite elements, exploiting a formal analogy with the fully coupled thermal displacement systems of PDEs implemen

The importance of including habitat-specific behaviour in models of butterfly movement

Dispersal is a key process affecting population persistence and major factors affecting dispersal rates are the amounts, connectedness and properties of habitats in landscapes. We present new data on the butterfly Maniola jurtina in flower-rich and flower-poor habitats that demonstrates how movement and behaviour differ between sexes and habitat types, and how this effects consequent dispersal rat

Effect and optimization of backward hole parameters on film cooling performance by Taguchi method

In recent years, increasing inlet temperature of gas turbines has far exceeded the melting point of the metal materials. Film cooling technology has widely been used to protect gas turbine blades from erosion of the high-temperature gases. The film cooling performance can be improved by optimization of the hole configurations. Results show that the backward injection hole has a smaller exit moment