Готові списки джерел за темами / Stress modelling

Добірка наукової літератури з теми "Stress modelling"

Автор: Grafiati

Опубліковано: 10 грудня 2022

Оновлено: 28 січня 2023

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Статті в журналах з теми "Stress modelling"

Agakhanov, E. K., M. K. Agakhanov, and R. E. Agakhanova. "Stress modelling in natural foundation." IOP Conference Series: Materials Science and Engineering 1001 (December 31, 2020): 012072. http://dx.doi.org/10.1088/1757-899x/1001/1/012072.

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Grigoroudis, K., and D. J. Stephenson. "Modelling low stress abrasive wear." Wear 213, no. 1-2 (December 1997): 103–11. http://dx.doi.org/10.1016/s0043-1648(97)00170-1.

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Yushchenko, K. A., E. A. Velikoivanenko, N. O. Chervyakov, G. F. Rozynka, and N. I. Pivtorak. "Finite-element modelling of stress-strain state in weldability tests (PVR-TEST)." Paton Welding Journal 2016, no. 12 (December 28, 2016): 9–12. http://dx.doi.org/10.15407/tpwj2016.12.02.

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Dear, Keith. "Modelling Productivity Loss from Heat Stress." Atmosphere 9, no. 7 (July 22, 2018): 286. http://dx.doi.org/10.3390/atmos9070286.

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Workers exposed to high ambient temperatures, either indoors or out, work slower. The few studies that have measured this loss of productivity show a degree of consistency across widely varying settings. I develop a class of 5-parameter probability models that express productivity as a function of environmental heat and show how the method of fitting can be adapted according to the completeness of the data available. As well as modelling the mean output, it is important to also consider variation between workers, and the model presented here achieves this. The method is illustrated using three previously published datasets from different industries and work environments.

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Mavlyutov, R. R., L. Н. Gorchakov, Sh Sh Galyaliev, N. M. Tuykin, A. G. Khakimov, and I. M. Tsirelman. "Modelling stress state in reaction columns." Proceedings of the Mavlyutov Institute of Mechanics 3 (2003): 72–81. http://dx.doi.org/10.21662/uim2003.1.005.

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The operation of chemical reactors, particularly those for producing benzene, is associated with the generation of a large amount of heat. Inaccurately chosen thermal regimes of performance in the reaction columns at large temperature gradients can be responsible for the occurrence of high thermal stresses that decrease the endurance of equipment elements. Therefore, it is quite topical to reveal, using the mathematical simulation approach, both positive and negative effects in relation to stress deformed state of equipment elements under different regimes of heat removal from the outside surface of the reaction columns.

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Tatsuoka, Fumio, Mohammed S. A. Siddiquee, Choon-Sik Park, Makoto Sakamoto, and Fumihiro Abe. "Modelling Stress-Strain Relations of Sand." Soils and Foundations 33, no. 2 (June 1993): 60–81. http://dx.doi.org/10.3208/sandf1972.33.2_60.

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Hariharan, Krishnaswamy, Jayant Jain, and Myoung Gyu Lee. "Modelling transient behavior during stress relaxation." Journal of Physics: Conference Series 1063 (July 2018): 012016. http://dx.doi.org/10.1088/1742-6596/1063/1/012016.

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Török, Bibiana, Eszter Sipos, Nela Pivac, and Dóra Zelena. "Modelling posttraumatic stress disorders in animals." Progress in Neuro-Psychopharmacology and Biological Psychiatry 90 (March 2019): 117–33. http://dx.doi.org/10.1016/j.pnpbp.2018.11.013.

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Deák, P., A. Gali, G. Sczigel, and H. Ehrhardt. "Modelling of stress-induced diamond nucleation." Diamond and Related Materials 4, no. 5-6 (May 1995): 706–9. http://dx.doi.org/10.1016/0925-9635(94)05223-9.

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Ståhle, Per, and Eskil Hansen. "Phase field modelling of stress corrosion." Engineering Failure Analysis 47 (January 2015): 241–51. http://dx.doi.org/10.1016/j.engfailanal.2014.07.025.

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Дисертації з теми "Stress modelling"

Jenter, Harry Leonard. "Modelling bottom stress in depth-averaged flows." Thesis, Massachusetts Institute of Technology, 1989. http://hdl.handle.net/1721.1/58501.

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Thesis (Ph. D.)--Joint Program in Oceanographic Engineering (Massachusetts Institute of Technology, Dept. of Civil Engineering; and the Woods Hole Oceanographic Institution), 1989.
Includes bibliographical references (leaves 140-145).
The relationship between depth-averaged velocity and bottom stress for wind-driven flow in unstratified coastal waters is examined here. The adequacy of traditional linear and quadratic drag laws is addressed by comparison with a 2 1/2-D model. A 2 1/2-D model is one in which a simplified 1-D depth-resolving model (DRM) is used to provide an estimate of the relationship between the flow and bottom stress at each grid point of a depth-averaged model (DAM). Bottom stress information is passed from the DRM to the DAM in the form of drag tensor with two components: one which scales the flow and one which rotates it. This eliminates the problem of traditional drag laws requiring the flow and bottom stress to be collinear. In addition, the drag tensor field is updated periodically so that the relationship between the velocity and bottom stress can be time-dependent. However, simplifications in the 2 1/2-D model that render it computationally efficient also impose restrictions on the time-scale of resolvable processes. Basically, they must be much longer than the vertical diffusion time scale. Four progressively more complicated scenarios are investigated. The important factors governing the importance of bottom friction in each are found to be 1) non-dimensional surface Ekman depth ... is the surface shear velocity, f is the Coriolis parameter and h is the water depth 2) the non-dimensional bottom roughness, zo/h where zo is the roughness length and 3) the angle between the wind stress and the shoreline. Each has significant influence on the drag law. The drag tensor magnitude, r, and the drag tensor angle, 0 are functions of all three, while a drag tensor which scales with the square of the depth-averaged velocity has a magnitude, Cd, that only depends on zo/h. The choice of drag law is found to significantly affect the response of a domain. Spin up times and phase relationships vary between models. In general, the 2 1/2-D model responds more quickly than either a constant r or constant Cd model. Steady-state responses are also affected. The two most significant results are that failure to account for 0 in the drag law sometimes leads to substantial errors in estimating the sea surface height and to extremely poor resolution of cross-shore bottom stress. The latter implies that cross-shore near-bottom transport is essentially neglected by traditional DAMs.
by Harry Leonard Jenter, II.
Ph.D.

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Thomson, Stuart. "Mathematical modelling of elastoplasticity at high stress." Thesis, University of Oxford, 2017. http://ora.ox.ac.uk/objects/uuid:a7d565c6-abeb-4932-8c1e-aebc38da7584.

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This thesis is concerned with the mathematical modelling of elastic-plastic deformation in regimes of stress far exceeding the yield stress. Such scenarios are typically encountered in violent impact testing, where millimetre-thick samples of metal are subjected to pressures on the order of the bulk modulus of the material. We begin with an overview of violent impact testing, with particular attention paid to a specific class of experiments known as isentropic compression experiments (ICEs), which will provide motivation for the mathematical modelling and analysis in subsequent chapters. In chapter 2, by appealing to sound notions from rational mechanics and thermodynamics, we construct a mathematical model which aims to encapsulate the essential phenomena involved in violent elastic-plastic deformation. This is followed in chapter 3 with a numerical analysis of the mathematical model in uniaxial strain, which is the geometry relevant ICEs. In chapters 4 and 5, we corroborate the observations made in chapter 3 via a systematic mathematical analysis. In particular, our focus will be on the elastic and plastic waves that can propagate through finite metal samples during isentropic compression. Finally, in chapter 6, we explore the applicability of our model to other geometries, specifically the radially axisymmetric expansion of a circular cavity embedded in an infinite elastic-plastic medium. We conclude with a summary of our findings and suggest some avenues for future investigation.

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Solowski, Wojciech Tomasz. "Unsaturated soils : constitutive modelling and explicit stress integration." Thesis, Durham University, 2008. http://etheses.dur.ac.uk/2083/.

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Haque, Mainul. "Mathematical modelling of eukaryotic stress-response gene networks." Thesis, University of Nottingham, 2012. http://eprints.nottingham.ac.uk/12509/.

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Mathematical modelling of gene regulatory networks is a relatively new area which is playing an important role in theoretical and experimental investigations that seek to open the door to understanding the real mechanisms that take place in living systems. The current thesis concentrates on studying the animal stress-response gene regulatory network by seeking to predict the consequence of environmental hazards caused by chemical mixtures (typical of industrial pollution). Organisms exposed to pollutants display multiple defensive stress responses, which together constitute an interlinked gene network (the Stress-Response Network; SRN). Multiple SRN reporter-gene outputs have been monitored during single and combined chemical exposures in transgenic strains of two invertebrates, Caenorhabditis elegans and Drosophila melanogaster. Reporter expression data from both species have been integrated into mathematical models describing the dynamic behaviour of the SRN and incorporating its known regulatory gene circuits. We describe some mathematical models of several types of different stress response networks, incorporating various methods of activation and inhibition, including formation of complexes and gene regulation (through several known transcription factors). Although the full details of the protein interactions forming these types of circuits are not yet well-known, we seek to include the relevant proteins acting in different cellular compartments. We propose and analyse a number of different models that describe four different stress response gene networks and through a combination of analytical (including stability, bifurcation and asymptotic) and numerical methods, we study these models to gain insight on the effect of several stresses on gene networks. A detailed time-dependent asymptotic analysis is performed for relevant models in order to clarify the roles of the distinct biochemical reactions that make up several important proteins production processes. In two models we were able to verify the theoretical predictions with the corresponding laboratory experimental observations that carried out by my coworkers in Britain and India.

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Hicks, Michael A. "Numerically modelling the stress-strain behaviour of soils." Thesis, University of Manchester, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.256573.

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Radmaneshfar, Elahe. "Mathematical modelling of the cell cycle stress response." Thesis, University of Aberdeen, 2012. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=192232.

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Karschau, Jens. "Mathematical modelling of chromosome replication and replicative stress." Thesis, University of Aberdeen, 2013. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=202763.

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Previous theoretical work on DNA replication neglected how the starting points (origins) take their place and how replication time is a ected when origins fail to activate. It is however crucial that origin loci are chosen so that too large gaps between them are avoided; otherwise the time until completion of chromosome replication becomes much longer than is allowed by the cell cycle. We investigate what the optimal origin location should be depending on the likelihood of origins failing. We show analytically and numerically that there exist regimes for origins, either to be positioned together in groups spaced far away from the next, or as equally scattered single origins depending on the uncertainty when activation occurs. The model reproduces origin distributions of frog embryos which are thought to be random, and shows contrarily that grouping must occur in order to swiftly complete replication; known as the random completion problem. The model also holds when considering a circular DNA topology for archaeal genomes, as well as if applied to the whole replication pro ling data of yeast. We study how an optimal origin distribution can arise and propose a mechanism to solve the random completion problem. We show that regular spacing emerges as an inherent property of the car parking model. We introduce a spatial requirement for origins to bind to DNA; origins occupy space on the DNA and can only bind stably if there is su cient space for them. Such a model leads to a well ordered origin distribution with minimal gaps as required for on time DNA replication in frog embryos. The optimal origin distribution emerges directly from our model because origins have a higher chance to bind to large empty regions instead of small once, therefore destroying large inter origin gaps. We also introduce a model to account for the interaction of replication forks with each other which leads to their assembly into replication factories. We show using Boltzmann statistics that their assembly is stochastic. A rst model only considers two pairs of forks which we then extend to describe properties of measured experimental distributions such as fork numbers per factory during on a whole yeast genome approach. Our in silico distribution of forks per factory matches in vivo data well; which suggests that active forks encounter each other randomly for an association into replication factories.

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Lykostratis, K. "Mathematical modelling of shear stress signalling in endothelial cells." Thesis, University College London (University of London), 2007. http://discovery.ucl.ac.uk/1445634/.

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In recent years it has become clear that cell signalling pathways are not simple linear chains of events as was once thought but frequently diverge, converge and employ positive and negative feedback. As a result signals show a complex pattern of spatial and temporal activity that is difficult to explain despite a wealth of experimental data. Systems Biology attempts to predict and understand the behaviour of complex systems by integrating information from diverse sources and principles drawn from a large number of different scientific disciplines. The signalling pathways regulating endothelial responses to shear stress have been extensively studied, since perturbed fluid flow contributes significantly to the development of heart disease. Shear stress activates many signals in endothelial cells, from ion influxes to protein phosphorylation and gene expression, and induces changes in endothelial morphology. Here a modelling and Systems Biology approach was taken to investigate and understand better the endothelial signal transduction networks that convert fluid flow stimulation into biochemical signals. A static signal transduction network was built from integrin cell surface receptors to activation of the tyrosine kinases focal adhesion kinase (FAK) and Src. Parameters for each reaction in this network were collected from the literature or, when necessary, estimated. To model how fluid flow initiates signalling in this network, the shear stress-induced calcium influx and the viscoelastic response of transmembrane receptors such as integrins to mechanical force were examined by means of mathematical modelling, using ordinary differential equations. These effects were used as primary activators of the shear stress response in endothelial cells, allowing quantitative analysis of the intracellular signal transduction flow which propagates from integrin to paxillin, FAK and Src activation. The magnitude and dependencies of each influence were examined individually and in conjunction with each other. The model was used to investigate the role and dynamic regulation of previously unstudied molecules in the network and the simulated results were compared against experimental data in order to validate hypotheses and increase our understanding of the molecular processes underlying the shear stress response.

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Lamb, Angharad. "Mathematical Modelling of the Biological Stress Response to Chronium." Thesis, University of Nottingham, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.517846.

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Roth, Hugh. "Fundamental modelling of single crystal nickel superalloy yield stress." Thesis, University of Cambridge, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.627177.

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Книги з теми "Stress modelling"

Karschau, Jens. Mathematical Modelling of Chromosome Replication and Replicative Stress. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-08861-7.

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Radmaneshfar, Elahe. Mathematical Modelling of the Cell Cycle Stress Response. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-00744-1.

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Modelling the stress-strain relationship in work settings. London: Routledge, 1998.

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Brownrigg, David W. Stress analysis of underground openings: A numerical modelling approach. Sudbury, Ont: Laurentian University, School of Engineering, 1997.

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Leonard, Jenter Harry. Modelling bottom stress in depth-averaged flows: Doctoral dissertation. Woods Hole, Mass: Woods Hole Oceanographic Institution, 1989.

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Nikjooy, Mohammad. On the modelling of non-reactive and reactive turbulent combustor flows. Cleveland, Ohio: Lewis Research Center, 1987.

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WS Atkins Science and Technology. Application of Reynolds stress modelling to gas build-up and external dispersion. [Sudbury]: HSE Books, 1999.

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Cantariti, F. J. J. Computation of external aerodynamic flows using differential Reynolds stress modelling and unstructured grids. Manchester: UMIST, 1995.

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1967-, Peng Shia-Hui, and Haase W. 1945-, eds. Advances in hybrid RANS-LES modelling: Papers contributed to the 2007 Symposium on Hybrid RANS-LES Methods, Corfu, Greece, 17-18 June 2007. Berlin: Springer, 2008.

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Michaleris, Pan. Minimization of welding distortion and buckling: Modelling and implementation. Oxford: WP, Woodhead Publishing, 2011.

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Частини книг з теми "Stress modelling"

van Dalen, Rogier C., Pascal Wiggers, and Leon J. M. Rothkrantz. "Modelling Lexical Stress." In Text, Speech and Dialogue, 211–18. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/11551874_27.

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Bolder, David. "Building Stress Scenarios." In Modelling Economic Capital, 463–541. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-95096-5_8.

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Bolder, David. "Thoughts on Stress Testing." In Modelling Economic Capital, 759–814. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-95096-5_12.

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Beaven, Harry, and Ioly Kotta-Loizou. "Modelling Oxidative Stress Pathways." In Networks in Systems Biology, 277–300. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-51862-2_11.

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Schmidt, Mathias V., Klaus V. Wagner, Xiao-Dong Wang, and Georgia Balsevich. "Modelling Stress-Related Mood Disorders in Animals." In Neuroendocrinology of Stress, 169–94. Chichester, UK: John Wiley & Sons, Ltd, 2015. http://dx.doi.org/10.1002/9781118921692.ch8.

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Garcia-Dominguez, Antonio, Konstantinos Barmpis, Dimitrios S. Kolovos, Ran Wei, and Richard F. Paige. "Stress-Testing Centralised Model Stores." In Modelling Foundations and Applications, 48–63. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-42061-5_4.

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Do Quang, Khanh, Thanh Nguyen Thi Tam, Phuc Kieu, Nhan Vo Huynh, and Quang Hoang Trong. "Modelling Stress Distribution Around Boreholes." In Lecture Notes in Civil Engineering, 769–74. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-15-0802-8_122.

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Aziz, Azizi Ab, Jan Treur, and C. Natalie van der Wal. "Modelling Caregiving Interactions during Stress." In Brain Informatics, 263–73. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-15314-3_25.

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Iskander, Magued. "Optical Measurement of Strain and Stress." In Modelling with Transparent Soils, 27–44. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-02501-3_4.

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Ahlquist, Sean. "Integrating Differentiated Knit Logics and Pre-Stress in Textile Hybrid Structures." In Modelling Behaviour, 101–11. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-24208-8_9.

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Тези доповідей конференцій з теми "Stress modelling"

Riva, Andrea, and Maurizio Maldini. "Stress Relaxation Modelling." In ASME Turbo Expo 2015: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/gt2015-43755.

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Modern gas turbine bolts experience severe operational conditions due to high temperatures and elevated axial stresses, generated by the tightening couple applied during the turbine assembly. In such conditions the relaxation of the initial stress due to viscous phenomena has to be taken into account in order to guarantee the proper operation of the turbine. Relaxation modelling can either be based on strain controlled relaxation tests or load controlled creep tests. Both solutions present difficulties: relaxation tests entail critical experimental issues, whereas creep tests may not be significant for the given strain controlled operational condition of a gas turbine bolt. Some of these problems will be described in the paper and solutions will be provided. The performances of several models for stress relaxation quantification will be compared, highlighting advantages and disadvantages of each approach. In particular, great emphasis will be given to those aspects which are relevant for bolt design or tightening load calculation. For instance, some important requirements are: firstly, the possibility to implement the given model easily in finite element calculations; secondly, the possibility to accurately calculate the relaxation in the second life of a serviced bolt after re-tightening; lastly, the possibility to reduce as much as possible the time required for the experimental tests. In order to evaluate the coefficients of the different models considered in the study, creep tests were performed at 450°C and 475°C with applied stresses producing a strain ε = 1% in a time range of 1000–10000h and stress relaxation tests were performed at the same temperatures with initial strain in the range of 0.2%. After some stress relaxation, the specimens were reloaded at the initial stress several times in order to simulate the aforesaid service conditions of bolts. In the paper it will be shown how a valid model, capable of predicting the stress relaxation with acceptable accuracy, can be fed either by creep or relaxation tests, provided that the experimental tests and the related data elaboration are conducted with the proper methodology. This scenario provides the engineer responsible for material model creation with a remarkable flexibility, essential to fulfill the requirements of modern GT design, in terms of accuracy, promptness of data collection and possibility of FEM implementation.

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Beeby, S. P. "Stress modelling of microstructures." In IEE Half-Day Colloquium on Computer Modelling Techniques for Microstructures. IEE, 1997. http://dx.doi.org/10.1049/ic:19970441.

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Korhonen, M. A., S. Rzepka, R. G. Filippi, and C. Y. Li. "Stress and electromigration modelling for confined chip level interconnect lines." In STRESS INDUCED PHENOMENA IN METALLIZATION. ASCE, 1998. http://dx.doi.org/10.1063/1.54651.

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Sridharan, Sriram, Ritwik Layek, Aniruddha Datta, and Jijayanagaram Venkatraj. "Modelling oxidative stress response pathways." In 2011 IEEE International Workshop on Genomic Signal Processing and Statistics (GENSIPS). IEEE, 2011. http://dx.doi.org/10.1109/gensips.2011.6169471.

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Mueller, Birgit, Johannes Altmann, A. Dorner, Tobias Müller, and Mark Tingay. "Modelling Pore Pressure/Stress Coupling." In First Southern Hemisphere International Rock Mechanics Symposium. Australian Centre for Geomechanics, Perth, 2008. http://dx.doi.org/10.36487/acg_repo/808_107.

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Chao, Yu-Tin, Ya-Lin Yu, Jia-Yush Yen, Che-Jung Hsu, Michael Kam, Ming-Chih Ho, Yung-Yaw Chen, Jiunn Fang, and Feng-Li Lian. "Dynamics Stress Analysis for a Minimal Invasive Scalpel Design." In Modelling and Simulation. Calgary,AB,Canada: ACTAPRESS, 2013. http://dx.doi.org/10.2316/p.2013.802-028.

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"Evaluation of Residual Stress by X-Ray Diffraction and Correlative Stress Modelling." In Residual Stresses 10. Materials Research Forum LLC, 2016. http://dx.doi.org/10.21741/9781945291173-36.

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Ramos-Auñón, Guillermo, Inma Mohino-Herranz, Héctor A. Sánchez-Hevia, Cosme Llerena-Aguilar, and David Ayllón. "Two-sensor EEG-based stress detection system." In Modelling, Identification and Control / 827: Computational Intelligence. Calgary,AB,Canada: ACTAPRESS, 2015. http://dx.doi.org/10.2316/p.2015.827-023.

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Cáceres, Cristian, Rimas Pakalnis, Martin Lewis, and Joseph Seymour. "PFC3D numerical modelling of round determinate panel test for shotcrete." In Fifth International Seminar on Deep and High Stress Mining. Australian Centre for Geomechanics, Perth, 2010. http://dx.doi.org/10.36487/acg_repo/1074_33.

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Valley, Benoit, Peter Kaiser, and Damien Duff. "Consideration of uncertainty in modelling the behaviour of underground excavations." In Fifth International Seminar on Deep and High Stress Mining. Australian Centre for Geomechanics, Perth, 2010. http://dx.doi.org/10.36487/acg_repo/1074_31.

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Звіти організацій з теми "Stress modelling"

Bell, J. S., and P. F. Lloyd. Modelling of Stress Refraction in Sediments Around the Peace River Arch, western Canada. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1989. http://dx.doi.org/10.4095/126688.

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Yordanova, Vesela, Galya Staneva, Miglena Angelova, Victoria Vitkova, Aneliya Kostadinova, Dayana Benkova, Ralitsa Veleva, and Rusina Hazarosova. Modelling of Molecular Mechanisms of Membrane Domain Formation during the Oxidative Stress: Effect of Palmitoyl-oxovaleroyl-phosphatidylcholine. "Prof. Marin Drinov" Publishing House of Bulgarian Academy of Sciences, January 2021. http://dx.doi.org/10.7546/crabs.2021.01.10.

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Bent, A. L., and P. Voss. Seismicity in the Labrador-Baffin Seaway and surrounding onshore regions. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/321857.

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Studying earthquakes in Baffin Bay and the surrounding regions is challenging. There is no knowledge of earthquake activity in this region prior to 1933 when a moment magnitude (MW) 7.4 earthquake occurred in Baffin Bay. With improved instrumentation, increased seismograph coverage in the north, and modern analysis techniques, knowledge and understanding of earthquakes in the Baffin region is improving. Active seismic zones include Baffin Bay, the east coast of Baffin Island, and the Labrador Sea, separated by areas of low seismicity. Focal-mechanism solutions show a mix of faulting styles, predominantly strike-slip and thrust. Regional stress-axes orientations show more consistency, which suggests that activity is occurring on previously existing structures in response to the current stress field. There is little correlation between earthquake epicentres in Baffin Bay and mapped structures. Glacial isostatic adjustment may be a triggering mechanism for earthquakes in the Baffin region, but modelling efforts have yielded equivocal results.

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Xourafi, Lydia, Polyxeni Sardi, and Anastasia Kostaki. Exploring psychological vulnerability and responses to the COVID-19 lockdown in Greece. Verlag der Österreichischen Akademie der Wissenschaften, July 2022. http://dx.doi.org/10.1553/populationyearbook2022.dat.5.

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This study explores the psychosocial impact of the COVID-19 pandemic on the population in Greece during the general lockdown period. Specifically, depression, anxiety and stress scores, as well as the factors associated with vulnerability to developing mental health conditions during this period, were investigated. A total of 911 adults participated in an online survey by completing a self-reporting questionnaire that included demographic questions, DASS-42 items (anxiety, stress and depression scales) and other questions related to personal experience. Regression modelling uncovered a significant relationship between gender and DASS scores, with women having significantly higher scores than men for all mental health problems. Participants aged 20–39 years were especially vulnerable to experiencing poor mental health. Unemployed participants reported having worse mental health than others. Having more perceived psychosocial support during the pandemic was associated with lower overall scores. Thus, women, young adults and the unemployed exhibited particularly high levels of vulnerability, while individuals who received social support from relatives and friends during the lockdown were more resilient to the effects of social isolation.

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Holub, Oleksandr, Mykhailo Moiseienko, and Natalia Moiseienko. Fluid Flow Modelling in Houdini. [б. в.], November 2020. http://dx.doi.org/10.31812/123456789/4128.

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The modern educational environment in the field of physics and information technology ensures the widespread use of visualization software for successful and deep memorization of material. There are many software for creating graphic objects for presentations and demonstrations, the most popular of which were analyzed. The work is devoted to the visualization of liquids with different viscosity parameters. The article describes the development of a fluid model in the form of a particle stream. The proposed methodology involves using the Houdini application to create interactive models. The developed model can be used in the educational process in the field of information technology.

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Davies, Will. Improving the engagement of UK armed forces overseas. Royal Institute of International Affairs, January 2022. http://dx.doi.org/10.55317/9781784135010.

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The UK government’s Integrated Review of security, defence, development and foreign policy, published in March 2021 alongside a supporting defence command paper, set a new course for UK national security and highlighted opportunities for an innovative approach to international engagement activity. The Integrated Review focused principally on the state threats posed by China’s increasing power and by competitors – including Russia – armed with nuclear, conventional and hybrid capabilities. It also stressed the continuing risks to global security and resilience due to conflict and instability in weakened and failed states. These threats have the potential to increase poverty and inequality, violent extremism, climate degradation and the forced displacement of people, while presenting authoritarian competitors with opportunities to enhance their geopolitical influence. There are moral, security and economic motives to foster durable peace in conflict-prone and weakened regions through a peacebuilding approach that promotes good governance, addresses the root causes of conflict and prevents violence, while denying opportunities to state competitors. The recent withdrawal from Afghanistan serves to emphasize the complexities and potential pitfalls associated with intervention operations in complex, unstable regions. Success in the future will require the full, sustained and coordinated integration of national, allied and regional levers of power underpinned by a sophisticated understanding of the operating environment. The UK armed forces, with their considerable resources and global network, will contribute to this effort through ‘persistent engagement’. This is a new approach to overseas operations below the threshold of conflict, designed as a pre-emptive complement to warfighting. To achieve this, the UK Ministry of Defence (MOD) must develop a capability that can operate effectively in weak, unstable and complex regions prone to violent conflict and crises, not least in the regions on the eastern and southern flanks of the Euro-Atlantic area. The first step must be the development of a cohort of military personnel with enhanced, tailored levels of knowledge, skills and experience. Engagement roles must be filled by operators with specialist knowledge, skills and experience forged beyond the mainstream discipline of combat and warfighting. Only then will individuals develop a genuinely sophisticated understanding of complex, politically driven and sensitive operating environments and be able to infuse the design and delivery of international activities with practical wisdom and insight. Engagement personnel need to be equipped with: An inherent understanding of the human and political dimensions of conflict, the underlying drivers such as inequality and scarcity, and the exacerbating factors such as climate change and migration; - A grounding in social sciences and conflict modelling in order to understand complex human terrain; - Regional expertise enabled by language skills, cultural intelligence and human networks; - Familiarity with a diverse range of partners, allies and local actors and their approaches; - Expertise in building partner capacity and applying defence capabilities to deliver stability and peace; - A grasp of emerging artificial intelligence technology as a tool to understand human terrain; - Reach and insight developed through ‘knowledge networks’ of external experts in academia, think-tanks and NGOs. Successful change will be dependent on strong and overt advocacy by the MOD’s senior leadership and a revised set of personnel policies and procedures for this cohort’s selection, education, training, career management, incentivization, sustainability and support.

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RESIDUAL STRESS OF WELDED I SECTIONS FABRICATED FROM HIGH PERFORMANCE STEEL: EXPERIMENTAL INVESTIGATION AND MODELLING. The Hong Kong Institute of Steel Construction, March 2019. http://dx.doi.org/10.18057/ijasc.2019.15.1.1.

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FINITE ELEMENT SIMULATION FOR ULTRA-HIGH-PERFORMANCE CONCRETE-FILLED DOUBLE-SKIN TUBES EXPOSED TO FIRE. The Hong Kong Institute of Steel Construction, August 2022. http://dx.doi.org/10.18057/icass2020.p.263.

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Ultra-high-performance concrete (UHPC) or ultra-high-strength concrete (UHSC) are alternatively used to reduce construction materials, thereby achieving more sustainable constructions. Moreover, engaging the advantages of concrete cores and outer steel tubes in concrete-filled steel tubes (CFST) or ductile concrete-filled double-skin tubes (CFDST) is of great interest for the better performance of such members under fire. Nevertheless, current design provisions do not provide design models for UHPC-filled double-skin tubes under fire, and existing finite-element (FE) methodologies available in the literature may not accurately simulate the behaviour of CFDST exposed to fire. Therefore, this paper develops a comprehensive FE protocol implementing the scripting technique to model CFDST members for heat transfer and coupled (simultaneously or sequentially) thermal-stress analyses. Various modelling parameters incorporated in the proposed FE routine include the cross-sectional geometry (circular, elliptical, hexagonal, octagonal, and rectangular), the size (width, diameter, and wall thickness), interactions, meshing, thermal- and mechanical-material properties, and boundary conditions. The detailed algorithm for heat transfer analysis is presented and elaborated via a flow chart. Validations, verifications, and robustness of the developed FE models are established based on extensive comparison studies with existing fire tests available in the literature. As a result, and to recognize the value of the current FE methodology, an extensive parametric study is conducted for different affecting parameters (e.g., nominal steel ratio, hollowness ratio, concrete cylindrical strength, yield strength of metal tubes, and width-to-thickness ratio). Extensive FE results are used for optimizing the fire design of such members. Consequently, a simplified and accurate analytical model that can provide the axial load capacity of CFDST columns under different fire ratings is presented

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