Blar i Vitenskapelige publikasjoner (TN-ISØP) på forfatter "Flage, Roger"
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Addressing challenges in uncertainty quantification: The case of geohazard assessments
Chivata Cardenas, Ibsen; Aven, Terje; Flage, Roger (Peer reviewed; Journal article, 2023)We analyse some of the challenges in quantifying uncertainty when using geohazard models. Despite the availability of recently developed, sophisticated ways to parameterise models, a major remaining challenge is constraining ... -
Assumptions in quantitative risk assessments: When explicit and when tacit?
Flage, Roger; Askeland, Tore (Peer reviewed; Journal article, 2020)In quantitative risk assessments, several explicit assumptions need to be made, to compute the risk metrics addressed. Such assumptions may, for example, relate to the number of people exposed to specific hazards, to the ... -
Characterising the robustness of coupled power-law networks
Johnson, Caroline Amy; Flage, Roger; Guikema, Seth David (Peer reviewed; Journal article, 2019)Many networks exhibit a power-law configuration, where the number of connections each node has follows a power-law distribution, including the Internet, terrorist cells, species relationships and infrastructure. Given the ... -
Combined analysis of unique and repetitive events in quantitative risk assessment
Flage, Roger; Dubois, Didier; Aven, Terje (Journal article; Peer reviewed, 2016-03)For risk assessment to be a relevant tool in the study of any type of system or activity, it needs to be based on a framework that allows for jointly analyzing both unique and repetitive events. Separately, unique events ... -
The concept of plausibility in a risk analysis context: Review and clarifications of defining ideas and interpretations
Glette-Iversen, Ingrid; Aven, Terje; Flage, Roger (Peer reviewed; Journal article, 2022)The plausibility concept has gained increasing attention in recent years in risk analysis settings. A number of definitions exist, most of which interpret plausibility as an expression of uncertainty. The concept is ... -
Dependent infrastructure system modeling: A case study of the St. Kitts power and water distribution systems
Stødle, Kaia; Metcalfe, Caroline Amy; Brunner, Logan; Saliani, Julian; Flage, Roger; Guikema, Seth David (Peer reviewed; Journal article, 2020)Critical infrastructure systems underlie the economy, national security, and health of modern society. These infrastructures have become increasingly dependent on each other, which poses challenges when modeling these ... -
An environmental risk assessment framework for enhanced oil recovery solutions from offshore oil and gas industry
Vora, Mehul Arun; Sanni, Steinar; Flage, Roger (Peer reviewed; Journal article, 2021)Environmental risk assessments are necessary to understand the risk associated with enhanced oil recovery (EOR) solutions and to provide decision support for choosing the best technology and implementing risk-reducing ... -
Environmental risk assessment of inter-well partitioning tracer compounds shortlisted for the offshore oil and gas industry
Vora, Mehul Arun; Njau, John-Sigvard Gamlem; Sanni, Steinar; Flage, Roger (Peer reviewed; Journal article, 2022-05)Quantifying residual oil saturation (SOR) in the inter-well region of oil and gas reservoirs is key for successfully implementing EOR solutions. Partitioning inter-well tracer tests (PITTs) has become a common method for ... -
An extended method for evaluating assumptions deviations in quantitative risk assessment and its application to external flooding risk assessment of a nuclear power plant
Bani-Mustafa, Tasneem; Flage, Roger; Vasseur, Dominique; Zhiguo, Zeng; Zio, Enrico (Peer reviewed; Journal article, 2020-04)In quantitative risk assessment, assumptions are typically made, based on best judgement, conservative, or (sometimes) optimistic judgments. Best judgment and optimistic assumptions may result in failing to meet the ... -
Extending and improving current frameworks for risk management and decision-making: A new approach for incorporating dynamic aspects of risk and uncertainty
Glette-Iversen, Ingrid; Flage, Roger; Aven, Terje (Peer reviewed; Journal article, 2023)In recent decades, there has been a growing recognition of the importance of risk-informed decision-making, and the use of risk assessments to support decisions is a core principle in current frameworks and standards for ... -
Feasibility study of PRA for critical infrastructure risk analysis
Johnson, Caroline Amy; Flage, Roger; Guikema, Seth David (Peer reviewed; Journal article, 2021)Probabilistic Risk Analysis (PRA) has been commonly used by NASA and the nuclear power industry to assess risk since the 1970s. However, PRA is not commonly used to assess risk in networked infrastructure systems such as ... -
Implementing an uncertainty-based risk conceptualisation in the context of environmental risk assessment, with emphasis on the bias of uncertain assumptions
Flage, Roger (Journal article; Peer reviewed, 2019-12)Environmental risk assessments are routinely carried out in the Norwegian petroleum industry. As this industry is moving north, towards the Arctic and into areas with differing vulnerabilities and new risk sources compared ... -
Mapping climate discourse to climate opinion: An approach for augmenting surveys with social media to enhance understandings of climate opinion in the United States
Bennett, Jackson; Rachunok, Benjamin; Flage, Roger; Nateghi, Roshanak (Peer reviewed; Journal article, 2021)Surveys are commonly used to quantify public opinions of climate change and to inform sustainability policies. However, conducting large-scale population-based surveys is often a difficult task due to time and resource ... -
Marine geohazards exposed: Uncertainties involved
Chivata Cardenas, Ibsen; Flage, Roger; Aven, Terje (Peer reviewed; Journal article, 2022)By exhaustively reviewing the literature related to marine geohazards, this paper reports on their uncertainties. Examples of marine geohazards include submarine landslides, fluid flows in the underground, scour events, ... -
On the Use of Standards and Guidelines as a Tool to Fulfil Regulatory Requirements
Nyvik, Christine Louise Berner; Flage, Roger; Guikema, Seth David (Peer reviewed; Journal article, 2021-01)Over the years, industrial safety regulation has shifted from a “hard” command and control regime to a “soft” regime. A “hard” regime includes the use of strict prescriptive requirements which explain how industry should ... -
A risk science perspective on liability/guilt and uncertainty judgements in courts
Aven, Terje; Flage, Roger (Peer reviewed; Journal article, 2022)This article aims to provide new insights about risk and uncertainty in law contexts, by incorporating ideas and principles of contemporary risk science. The main focus is on one particular aspect of the law: its operation ... -
A risk science perspective on vaccines
Glette-Iversen, Ingrid; Aven, Terje; Flage, Roger (Peer reviewed; Journal article, 2023)Vaccines can be seen as one of the greatest successes in modern medicine. Good examples are the vaccines against smallpox, polio, and measles. Unfortunately, vaccines can have side effects, but the risks are considered by ...