Now showing items 1-10 of 1329
Resilience Assessment: A Performance‐Based Importance Measure
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-11-12)
The resilience of a system can be considered as a function of its reliability and recoverability. Hence, for effective resilience management, the reliability and recoverability of all components which build up the system need to be identified. After that, their importance should be identified using an appropriate model for future resource allocation. The critical infrastructures are under dynamic ...
General recurrence-relation generation scheme for molecular integral evaluation
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-09-24)
We develop a new scheme for evaluating different molecular integrals using Gaussian type orbitals. In this new scheme, the evaluation of integrals is performed in two steps during runtime. The first step is a top-down procedure that maps each recurrence relation into a jagged array (array of arrays), where each element of a member array represents either the final results or some intermediate integrals ...
Renewable Solvents for Palladium-Catalyzed Carbonylation Reactions
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-09-04)
Solvents constitute the largest component for many chemical processes and substitution of nonrenewable solvents is a longstanding goal for green chemistry. Here, we show that Pd-catalyzed carbonylative couplings, such as carbonylative cross-couplings, aminocarbonylations, and alkoxycarbonylations, can be successfully realized using renewable solvents. The present research covers not only well-established ...
Differential Invariants of Linear Symplectic Actions
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-12-07)
We consider the equivalence problem for symplectic and conformal symplectic group actions on submanifolds and functions of symplectic and contact linear spaces. This is solved by computing differential invariants via the Lie-Tresse theorem.
Modification of bedrock surfaces by glacial abrasion and quarrying: Evidence from North Wales
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-05-30)
Abrasion and quarrying are significant processes of subglacial erosion for ice masses in direct contact with hard substrates, yet their relative efficacy and spatio-temporal variability is unclear. Here, we investigate the glacial impact of these processes on a 70 m by 60 m bedrock surface at Moel Ysgyfarnogod in the Rhinog Mountains, Wales, using a combination of high-resolution digital photographs, ...
A Possible Explanation of Interhemispheric Asymmetry of Equatorial Plasma Bubbles in Airglow Images
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-02-28)
Equatorial plasma bubbles resulting from equatorial spread urn:x-wiley:jgra:media:jgra55597:jgra55597-math-0002 are well known to be aligned along the Earth's geomagnetic fields. During the geomagnetic storm on 17 March 2015, all‐sky airglow observations from Tirunelveli (8.7°N, 77.8°E, 1.7°N dip latitude) showed an apparent interhemispheric asymmetry in the tilt of the equatorial plasma bubbles. ...
Joint optimization of an autoencoder for clustering and embedding
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-06-21)
Deep embedded clustering has become a dominating approach to unsupervised categorization of objects with deep neural networks. The optimization of the most popular methods alternates between the training of a deep autoencoder and a k-means clustering of the autoencoder’s embedding. The diachronic setting, however, prevents the former to beneft from valuable information acquired by the latter. In ...
Comment to “Neoproterozoic magmatic arc systems of the central Ribeira belt, SE-Brazil, in the context of the West-Gondwana pre-collisional history: A review”
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-11-25)
Regional Morpho-Kinematic Inventory of Slope Movements in Northern Norway
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-11-25)
Mountain slopes in periglacial environments are affected by frost- and gravity-driven processes that shape the landscape. Both rock glaciers and rockslides have been intensively inventoried worldwide. Although most inventories are traditionally based on morphologic criteria, kinematic approaches based on satellite remote sensing have more recently been used to identify moving landforms at the regional ...
Sea ice thickness from air-coupled flexural waves
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-06-28)
Air-coupled flexural waves (ACFWs) appear as wave trains of constant frequency that arrive in advance of the direct air wave from an impulsive source travelling over a floating ice sheet. The frequency of these waves varies with the flexural stiffness of the ice sheet, which is controlled by a combination of thickness and elastic properties. We develop a theoretical framework to understand these ...