Norwegian University of Science and Technology

Numerical investigation of repurposing oil storage caverns for hydrogen storage using lined rock cavern (LRC) technology

The growing demand for large-scale geological hydrogen storage has driven the exploration of resource-efficient methods for repurposing existing underground infrastructure. This study assesses the technical feasibility of converting underground oil storage caverns into lined rock...

Integrating waste heat and biomass energy in a three-entropy state framework optimized by emergy-carbon-neural network for sustainable buildings

This study addresses the urgent need for low-carbon transformation in the construction sector by proposing a novel building energy supply system that integrates industrial waste heat and biomass energy to tackle the issues of low energy efficiency and high carbon emissions in tra...

Toward a Thermodynamic Framework for Dissipative Solitons: From Photonics to Turbulence and Bose–Einstein Condensate Analogies

Thermodynamic concepts are increasingly used in nonlinear photonics to describe Rayleigh–Jeans thermalization, optical wave turbulence, condensation, negative-temperature states, and statistical mode locking. We ask how far this reasoning can be extended to localized structures m...

Development of an Automated Inflection Point Detection Algorithm for Deformation Rate Analysis

Abstract Accurate estimation of in situ stresses is essential for safe design of underground civil and mining engineering structures. Traditional in situ stress measurement methods often require extensive time, resources, and access to test location. Moreover, with these methods,...

A prospective plant-level material flow analysis to assess systemic efficiency in the transition to hydrogen-based steelmaking

Abstract Decarbonizing steel production requires adopting low-carbon technologies and the efficient use of available resources, yet the effects of such a transition on the metabolism of the plant remain underexplored. This study applies a prospective plant-level Material Flow Ana...

AIS-Based Analysis of Passenger Vessel Traffic and Emissions in Coastal Norway

Background: Cruise and passenger vessel traffic is an important component of coastal transportation, but increasing activity can intensify logistical complexity, traffic interactions, and environmental pressure. Understanding vessel behavior across ports and sailing corridors is...

Regional operability and per-turbine installation time for bottom-fixed offshore wind: Side-mating catamaran versus conventional crane vessel across four markets

Bottom-fixed offshore wind turbine installation depends on a limited fleet of wind turbine installation vessels (WTIVs), whose requirements tighten as turbines scale beyond the 15 MW class. With this fleet projected to fall short of demand, concepts that add capacity without comp...

Interferometric Vector Piezoresponse Force Microscopy for Simultaneous Ferroelectric Domain and Crystallographic Orientation Mapping in Uniaxial Ferroelectric Polycrystals

ABSTRACT Ongoing advances in scanning probe microscopy techniques are continually expanding the possibilities for nanoscale characterization and correlated studies of functional materials. Here, we demonstrate how a recent extension of piezoresponse force microscopy (PFM), known...

Variation in general practitioners’ mental health diagnostic tendencies and subsequent patient care: a Norwegian registry study

Abstract Background General practitioners (GPs) are often the first point of contact for adults presenting with symptoms of depression or anxiety. Practices may vary due to patient and physician tendencies, influencing treatment pathways. This study aimed to quantify variation in...

Experimental study of pressure drop in traditional and modified labyrinth seals of Francis turbine

Abstract Labyrinth seals are primary non-contact seals used to minimise leakage losses between high and low-pressure regions in Francis turbines. This paper describes the development of an experimental setup (consisting of piping method and pressure sensors) for measuring the pre...

Mapping Teachers’ Environmental Attitude, Engagement, and Education Practices in South Sudanese Schools

This study examines the relationship between teachers’ level of environmentalism and their pedagogical practices across South Sudan, using a survey conducted among 254 primary school teachers in the Yei and Juba counties of Central Equatoria State, South Sudan. Through a statisti...

Obstetric Factors Associated with Pelvic Floor Disorders and Surgery 30 Years After Childbirth: A Prospective Cohort Study

We aimed to compare symptoms of pelvic floor disorders (PFDs) and surgery risk by mode of delivery 30 years after first childbirth and assess symptom changes over time. We also examined associations between PFDs and pelvic floor muscle injuries. Prospective cohort study in 2024 o...

A Theory of the Earth and the Eternal Return of the Same: Nietzsche and the Geology of His Time

Abstract Nietzsche’s engagement with the natural sciences significantly shaped his philosophical ideas, contrary to Martin Heidegger’s dismissal of Nietzsche’s scientific interests as an “aberration.” While the impact of various scientific disciplines on Nietzsche’s philosophy ha...

Shipping Resilience Under Stress: Shock Typology and Container-Freight-Market Recovery Dynamics, 2007–2026

Background: Global maritime supply chains increasingly face overlapping disruptions, yet existing studies often analyse individual crises rather than comparing how stress regimes evolve across system states, channel-specific conditions, and recovery duration. Methods: This study...

CT sinus imaging utilization in Norway: trends over time and variation by region, age, and sex

Abstract Background Computed tomography (CT) of the sinuses is a standard component of radiological diagnostics. CT of the sinuses are often regarded as low-value care owing to their minimal impact on disease management. The aim of this study is to describe geographical and tempo...

Categorification and mirror symmetry for Grassmannians

Abstract The homogeneous coordinate ring of the Grassmannian is a cluster algebra, with an additive categorification . In particular, every in has a cluster character . We work initially in a more general Frobenius 2‐CY subcategory of , where is an algebra defined simply relative...

Global ghost fishing characterization model for derelict bottom set gillnets

Ghost fishing, the unintended capture of marine life by abandoned, lost, and discarded fishing gear, is a major driver of biodiversity loss in the marine environment. Among major fishing gear types, derelict gillnets are widely considered to pose the greatest threat to marine bio...

On the importance of body-size proxies when scaling sexual dimorphism: A case study in Mustelidae

Sexual dimorphism in a focal trait can arise from sex-specific selection acting directly on this trait. Alternatively, it may result from sex-specific selection acting on body size, to which the focal trait is genetically correlated. Quantifying the allometric relationship betwee...

Success Scale: Aspects of reliability and validity of a new 17-item scale assessing factors of importance for success

In this article, we examine the psychometric properties of a newly developed instrument designed to measure success. The Success Scale was created to provide a practical and efficient tool for large-group administration, with a straightforward structure that is easy to implement...

Young Voters and Budget Deficits

This study examines the impact of lowering the voting age from 18 to 16 in selected Norwegian municipalities in 2011. The quasi-experimental design reveals a reduction in net operating surplus by approximately NOK 600 (€60) per capita in affected local governments. This aligns wi...