Search results

Filter

Filetype

Your search for "*" yielded 539339 hits

Temporal reliability evolution of a prestressed girder with post-tensioned tendons subjected to corrosion

This paper presents a methodology for the assessment of time-dependent reliability of post-tensioned (PT) girders. As possible lack of consistent maintenance efforts and the constraints of economic and temporal resources become increasingly apparent, there is a need to comprehend their remaining service life, intricately tied to the gradual evolution of their reliability over time. In this study,

On service life quantification and service life management

The service life of infrastructures is of high relevance for the provision of societal and industrial functionality and sustainability. Despite this high relevance, the service life is not explicitly considered of the design and operation procedures. Towards an efficient and sustainable service life management, this paper contains a description of approaches for service life limit quantification a

High-resolution Transmission Spectroscopy of Warm Jupiters: An ESPRESSO Sample with Predictions for ANDES

Warm Jupiters are ideal laboratories for testing the limitations of current tools for atmospheric studies. The cross-correlation technique is a commonly used method to investigate the atmospheres of close-in planets, leveraging their large orbital velocities to separate the spectrum of the planet from that of the star. Warm Jupiter atmospheres predominantly consist of molecular species, notably wa

Challenges in the engineering design, manufacture, and testing of polymer gears

Polymer gears are becoming more and more interesting parts of various machines; they are used in ever-more-demanding operating conditions. Due to their good mechanical properties, lightweight, and low noise during operation, they tend to substitute metallic gears in some traditional applications, and they also enter new applications such as e-bikes. A reliable design of polymer gears remains, to d

Atmospheric characterization and tighter constraints on the orbital misalignment of WASP-94 A b with HARPS

We present high spectral resolution observations of the hot Jupiter WASP-94 A b using the HARPS instrument on ESO’s 3.6-m telescope in La Silla, Chile. We probed for Na absorption in its atmosphere as well as constrained the previously reported misaligned retrograde orbit using the Rossiter–McLaughlin effect. Additionally, we undertook a combined atmospheric retrieval analysis with previously publ

Secrets in the shadow : High precision stellar abundances of fast-rotating A-type exoplanet host stars through transit spectroscopy

Context. The spectra of fast-rotating A-type stars have strongly broadened absorption lines. This effect causes blending of the absorption lines, hindering the measurement of the abundances of the elements that are in the stellar photosphere.Aims. As the exoplanet transits across its host star, it obscures the stellar spectrum that is emitted from directly behind the planet. We aim to extract this

The atmospheric composition of the ultra-hot Jupiter WASP-178 b observed with ESPRESSO

Context. Ultra-hot Jupiters (UHJ) have emerged as ideal testbeds for new techniques for studying exoplanet atmospheres. Only a limited number of them are currently well studied, however.Aims. We search for atmospheric constituents for the UHJ WASP-178 b with two ESPRESSO transits. Additionally, we show parallel photometry that we used to obtain updated and precise stellar, planetary, and orbital p

Design of a Phantom Mimicking Rectal Lymph Nodes for Magnetomotive Ultrasound

OBJECTIVE: Durable and stable phantoms for verifying and validating the new magnetomotive ultrasound technique are lacking. Here we propose a phantom design to address this need.METHODS: A mixture of styrene-butylene/ethylene-styrene (SEBS) in mineral oil and glass beads as a scattering material acted as a bulk material, in which a polyvinyl alcohol (PVA) inclusion containing magnetic nanoparticle

Increased Displacement in Magnetomotive Ultrasound Imaging by Adding a Homogeneous Magnetic Field

Magnetomotive Ultrasound, MMUS, is an imaging modality used to reveal a magnetic contrast agent using an external time-varying inhomogeneous magnetic field. By this, the particles are set in motion, and the motion is detected with ultrasound. The technique has applications in cancer detection but is limited in penetration as the magnetic field decreases rapidly with distance. Instead of increasing

Multicriteria design of polymer gears according to VDI 2736 guideline

The design of polymer gears is an open challenge; several constraints must bechecked during the design process due to the complex relations between different design parameters and specifics of application. The failure modes are determined by the load level, used material pair, and operating conditions—speed of rotation, environment temperature, and lubrication. Polymer gear design is not a straigh

Farmers' willingness to introduce short-rotation plantations on agricultural land: a case study in southern Sweden

To meet climate targets, expanding Populus spp. tree cultivation is proposed as a potential biomass feedstock, especially on agricultural land that does not come into conflict with food production. However, biomass potential assessments typically overlook landowners' perspectives, risking a gap between theoretical potentials and realisation. Here, we test empirical consequences of two hypotheses b

Mold design and injection molding simulations for polymer gear

Product design requirements are becoming more and more complex, while the number of available materials is increasing. Polymeric materials are still dominant in many applications, replacing other manufacturing materials. Gears are one of the mechanical parts that are increasingly made of plastic. To effectively replace metal materials, the design process and product material must meet all applicat

Polymer gears

The book serves as a comprehensive and professional guide on polymer gears design and production. It provides the reader withan overview of the current developments in the field composite materials, testing, and applications of polymer gears. This includesmaterial development, tribological properties, simulations, and processing methods.Due to their efficient mechanical properties, light weight, a

Are CEOs judged on how cost efficient their firms are?

This paper investigates whether executive boards consider firm-specific inefficiencies when they change CEOs in the Swedish electricity distribution sector. Firm-level inefficiencies are calculated using data from all Swedish electricity distributors from 2001 to 2022 and a data envelopment analysis (DEA) approach. DEA has advantages over standard financial key performance indicators since it cont

Stein-type control function maximum likelihood estimator for the probit model in the presence of endogeneity

A Stein-type control function maximum likelihood (CFML) estimator is suggested for the probit model in the presence of endogeneity. This novel estimator combines the probit maximum likelihood and CFML estimators. The asymptotic distribution and risk function for the new estimator is derived. It is demonstrated that, subject to certain conditions of the shrinkage parameter, the asymptotic risk of t

Waste as a Critique

This volume shows how waste in its manifold variety provides an innovative starting point for interrogating twenty-first-century society. Waste in and of itself, along with those who work with it, may suffer from social stigma. As an epistemological point of departure however, waste offers an advantageous platform for social inquiry. Drawing on the contributions from an international team of inter

Dissecting the properties of circulating IgG against streptococcal pathogens through a combined systems antigenomics-serology workflow

This study showcases an integrative mass spectrometry-based strategy combining systems antigenomics and systems serology to characterize human antibodies in clinical samples. This strategy involves using antibodies circulating in plasma to affinity-enrich antigenic proteins in biochemically fractionated pools of bacterial proteins, followed by their identification and quantification using mass spe

Epitope Mapping with Sidewinder : An XL-MS and Structural Modeling Approach

Antibodies are critical to the host's immune defense against bacterial pathogens. Understanding the mechanisms of antibody-antigen interactions is essential for developing new targeted immunotherapies. Building computational workflows that can identify where an antibody binds its cognate antigen and deconvoluting the interaction interface in a high-throughput manner are critical for advancing this

Summary of the trigger systems of the Large Hadron Collider experiments ALICE, ATLAS, CMS and LHCb

In modern high energy physics (HEP) experiments, triggers perform the important task of selecting, in real time, the data to be recorded and saved for physics analyses. As a result, trigger strategies play a key role in extracting relevant information from the vast streams of data produced at facilities like the large hadron collider (LHC). As the energy and luminosity of the collisions increase,