Artikler, rapporter og annet (teknologi og sikkerhet): Recent submissions
Now showing items 21-40 of 336
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Revisiting Unsinkable Ships: From Titanic to Helge Ingstad, the Long-Standing Issues and Persistent Risks of Ship Disasters
(Journal article; Tidsskriftartikkel, 2024-03)The objective of this paper is to take a closer look at the theory of damage stability, i.e., origin, construction, organization and human developments, regulations, and in this context pinpoint a possible causal relationship between two specific ship losses: the losses of RMS Titanic and KNM Helge Ingstad. The paper does not discuss direct causes but rather tries to discuss possible causal links ... -
A state-of-the-art review of AI decision transparency for autonomous shipping
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-04-03)The introduction of maritime autonomous surface ships (MASSs) has prompted a significant shift in the role of navigators from traditional navigation to supervising artificial intelligence (AI) collision avoidance systems or managing operations from remote operation centers (ROCs). This may be problematic because the integration of AI technologies into collision avoidance systems may jeopardize safety ... -
Enhancing fuel injection system reliability through Weibull family functions analysis
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-08-01)The efficient operation of heavy machinery is crucial to the success of mining and civil construction operations. To guarantee this performance, equipment performance is assessed using the Reliability Index, which analyzes failures to study the ability of a system to carry out its intended functions under predetermined conditions. On the other hand, the failure rate and operational environmental ... -
Optimizing the maintenance threshold in presence of shocks: A numerical framework for systems with non-monotonic degradation
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-02-24)Shocks have attracted considerable interest in reliability and maintenance engineering because of their impact on vulnerable systems. Most industrial systems suffer from both internal degradation caused by fatigue and wearout, and external shocks that often occur randomly due to harsh weather conditions, overloading, etc. Developing maintenance optimization models without taking these stochastic ... -
Deciphering climate change impacts on resource extraction supply chain: a systematic review
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024)Mining is becoming increasingly vulnerable to the effects of climate change (CC). The consequences of changing weather patterns, such as extreme weather events that can damage equipment, infrastructure, mining facilities, and operation interruption, are the source of the vulnerability. The new demand initiated by governments and international agreements put extra pressure on mining industries to ... -
Annerledes og likeverdig: førstelektorstillingens skjebne under akademias konvensjoner
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-06-07)I Norge finnes to karriereveier innen undervisning og forskning i høyere utdanning. Veien fra stipendiat via førsteamanuensis til professor er den mest brukte. Men en tredel av de tilsatte i høyere utdanning er tilsatt i en karrierestige som går fra universitets- eller høgskolelektor via førstelektor til dosent. De to karriereveiene kan sies å være knyttet til ulike kunnskapsregimer. I de siste 20 ... -
Annerledes og likeverdig: førstelektorstillingens skjebne under akademias konvensjoner
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-06-07)I Norge finnes to karriereveier innen undervisning og forskning i høyere utdanning. Veien fra stipendiat via førsteamanuensis til professor er den mest brukte. Men en tredel av de tilsatte i høyere utdanning er tilsatt i en karrierestige som går fra universitets- eller høgskolelektor via førstelektor til dosent. De to karriereveiene kan sies å være knyttet til ulike kunnskapsregimer. I de siste 20 ... -
Localized advanced ship predictor for maritime situation awareness with ship close encounter
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-05-04)The marine navigation environment can become further complex when ships with different autonomy levels are introduced. To ensure navigation safety in such a mixed environment, advanced ship predictor type technologies are essential in aiding ship navigators to attain the highest levels of situation awareness (SA). Consequently, precise ship trajectory prediction, specifically within a short prediction ... -
Assessing resilience in mechanical systems: an industrial perspective
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-03-12)Purpose - Resilience as a novel concept has attracted the most attention in the management of engineering systems. The main goal of engineering systems is production assurance and increasing customer satisfaction which depends on the suitable performance of mechanical equipment. “A resilient system is defined as a system that is resistant to disruption and failures and can recover itself and returns ... -
Global change research needs international collaboration
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-08-04)Tackling the grand challenges of global climate change for the sustainability of ecological and societal systems requires data and expertise from Russia, the world's largest country that has the longest Arctic shoreline and the largest forest biome, peatland and permafrost zones. Academic relations and scientific collaborations with Russian scholars and institutions must continue despite the ensuing ... -
Scenario Design, Data Measurement, and Analysis Approaches in Maritime Simulator Training: A Systematic Review
(Chapter; Bokkapittel, 2023-08-29)Developing objective assessment approach in maritime simulator training can be a highly challenging task due to the complexity of simulating realistic scenarios, capturing relevant performance indicators and establishing good assessment protocols. This study provides a synthesis of simulation scenario contexts, data collection tools, and data analysis approaches in published simulator training ... -
Reliability Assessment of Computer in Design Phase Under High Censored Setting
(Chapter; Bokkapittel, 2023-02-01)Assessment of reliability of personal computer is a challenge for the developer as the lack of sufficient data. Ordinary statistical approach depending on large dataset has less convincible result for the developer to make decision. Prior to massive production, the computer manufacturer runs a life test by picking up a certain number of new computers to run to failure to enlarge the data set. ... -
Uncertainties in Managing Atmospheric Icing on Power Lines
(Chapter; Bokkapittel, 2023)Icing affects the infrastructure dramatically, especially in the cold region. Therefore, applying effective ice disaster management (IDM) to provide a systematic approach to dealing with atmospheric icing on power lines is essential. It includes preparedness, response, recovery, learning, risk assessment, and prevention. Integral to this management is the accurate prediction and modeling of icing, ... -
The Effect of LNG and Diesel Fuel Emissions of Marine Engines on GHG-Reduction Revenue Policies Under Life-Cycle Costing Analysis in Shipping
(Chapter; Bokkapittel, 2023)The fuel life cycle involves different phases of extraction/refinery (well to tank: WtT), transport (tank to propeller: TtP), and storage where each of these processes can add a specific amount of emissions to the overall LCCA inventory. During the extraction or operation of machinery on the raw material, the released amount of GHG components is undergoing a change in the generated emissions per ... -
Trustworthiness Evaluation Framework for Digital Ship Navigators in Bridge Simulator Environments
(Chapter; Bokkapittel, 2023)The maritime industry is going towards implementing digital navigators, i.e., AI created by machine learning algorithms, on autonomous vessels in the future. Digital navigators can be developed by utilizing machine learning algorithms, e.g., deep learning type neural networks trained by data sets from human navigators. Even though there is significant importance in studying the trustworthiness of ... -
Multiple Model Adaptive Estimation Coupled With Nonlinear Function Approximation and Gaussian Mixture Models for Predicting Fuel Consumption in Marine Engines
(Chapter; Bokkapittel, 2023)Digital twin type models can be developed for physical systems that are complex nonlinear a system of systems (SoS). However, such models are usually difficult to represent by linear equations. Therefore, an adequate linearization technique should be introduced. Therefore, linear models as digital twins can be interpreted easily and need much less computational power when applied to various industrial ... -
Advanced data cluster analyses in digital twin development for marine engines towards ship performance quantification
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-02-24)Due to the growing rate of energy consumption, it is necessary to develop frameworks for enhancing ship energy efficiency. This paper proposes a solution for this issue by introducing a digital twin framework for quantifying ship performance. For this purpose, extensive low-level clustering is performed using Gaussian Mixture Models (GMM) with the Expectation Maximization algorithm on a dataset ... -
Energy-Efficient Marine Engine and Dynamic Wing Evaluation Under Laboratory Conditions to Achieve Emission Reduction Targets in Shipping
(Chapter; Bokkapittel, 2023-09-22)There is a requirement to comply with the forthcoming IMO & EU requirements to reduce ship emissions by at least 40% in 2030 compared to the 2008 levels. Such medium-term emission reduction targets can only be achieved by introducing novel technologies into the shipping industry. The SeaTech H2020 project (seatech2020.eu) introduces two main innovations that can support the same emission reduction ... -
Conceptualizing AMR as a creeping disaster in terms of pace and space
(Chapter; Bokkapittel, 2023)Traditionally defined, disasters are understood as relatively limited in duration. Yet we also know that some disasters are of a creeping and indeed perpetual nature – their onsets do not seize to advance. One example is AMR. In theory, it should be easier to respond to such creeping disasters as a result of their slow build up. In reality, however, swift response to creeping disasters rarely ... -
The challenges experts face during creeping crises: the curse of complacency
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-01-05)The policy literature has generally conceptualised crises as urgent public threats with clearly demarcated ‘focusing events’. Consequently, most studies have identified the main challenges faced by expert agencies involved in evidence-based policymaking as managing uncertainty, time pressure and communication. However, less focus has been devoted to analysing the concrete challenges faced by expert ...