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X-WR-CALNAME:University of Nottingham's SIAM & IMA Student Chapter
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DTSTART;TZID=UTC:20220202T140000
DTEND;TZID=UTC:20220202T150000
DTSTAMP:20260424T082704
CREATED:20211214T161655Z
LAST-MODIFIED:20220202T204722Z
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SUMMARY:From growing neurons and sunflowers to liquid crystal elastomers and elephant trunks: the fascinating dynamics of active filaments
DESCRIPTION:We’re delighted to be hosting Alain Goriely for a talk via Teams. \n\n\n\n\n\n\n\nAbstract: The natural and artificial world around us is full of active filamentary structures that respond to external stimuli and modify their internal structures through growth or remodeling to achieve specific functions. For instance\, to survive and to thrive\, plants rely on their ability to sense multiple environmental signals\, such as gravity or light\, and respond to them by growing in a particular direction and by changing their shape. Similarly\, during development\, neurons sense their environment to grow and interconnect different regions of the brain. Octopus arms and elephant trunks are other magnificent examples of the power and beauty of activated filamentary structures. In engineering structures\, certain liquid crystal elastomers can be shaped into filaments that respond and bend towards incident light with enticing possibilities for new devices. These systems share the same slender geometry\, the same mechanical constraints\, and they all face three important challenges: how is the external signal transduced to the microstructure? How is it activated? How should the microstructure be organised/designed for a particular function? \n\n\n\nIn this talk\, I will discuss a general mathematical theory of active filaments based on morphoelasticity and dimensional reduction. In this approach\, multiple stimuli can be integrated at the microscopic level to produce curvature and torsion at the macroscopic level\, thus modifying the filament shape and position with respect to the stimuli. General principles for microstructure organisation and activation can  then be obtained. More interestingly\, this feedback loop of shape shifting based on external sources creates complex dynamics akin to actual natural behaviours and can be used to find elegant solutions to functional problems. \n\n\n\n\n\nFrom growing neurons and sunflowers to liquid crystal elastomers and elephant trunks: the fascinating dynamics of active filaments. Video also available using the following link:Watch ‘External Speaker Seminar (Alain Goriely): From growing neurons and sunflowers to liquid crystal elastomers and elephant trunks: the fascinating dynamics of active filaments’ | Microsoft Stream
URL:https://nottingham-siam-ima.com/event/alain-goriely-2022/
LOCATION:via Microsoft Teams and streamed in D09\, Monica Partridge Building
CATEGORIES:External Speaker Seminars
ATTACH;FMTTYPE=image/jpeg:https://nottingham-siam-ima.com/wp-content/uploads/2021/12/goriely-blackboard-bw-square.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20211104T143000
DTEND;TZID=UTC:20211104T153000
DTSTAMP:20260424T082704
CREATED:20211006T092803Z
LAST-MODIFIED:20211021T103313Z
UID:435-1636036200-1636039800@nottingham-siam-ima.com
SUMMARY:A Good Mathematician is a Lazy Mathematician
DESCRIPTION:Title\n\n\n\nA Good Mathematician is a Lazy Mathematician \n\n\n\nAbstract\n\n\n\nI am not sure when I first heard this phrase\, I suspect it was used by one of my sixth form maths teachers\, but I have increasingly come to realise how true this is – and what is more remarkable this laziness has actually shaped the way we\, and perhaps society\, think about mathematics. \n\n\n\nThe talk will introduce me and give some background about myself and my career to provide context. The main part of the talk will explore some of the short cuts of mathematics\, and the influences they have had. Examples will include some of Euler’s thinking and ‘clock arithmetic’ and the use of logarithms pioneered by Napier\, Briggs and Oughtred. The talk will be illustrated with slides\, and there will also be some mathematical ‘props’ to show. \n\n\n\nThe talk will conclude with a brief description of some of the ways government uses mathematics\, and opportunities of engaging with this\, either as employees or otherwise. \n\n\n\nBiography\n\n\n\n\n\nEd’s professional career has been spent as a civil servant in the MOD scientific branch\, initially the Defence Evaluation and Research Agency and subsequently the Defence Science and Technology Laboratory. This followed a degree in mathematics at Loughborough University.Throughout this time Ed has evolved from a junior research scientist to an experienced leader and manager. Currently developing and growing strategic partnerships to ensure Science and Technology can create impact and prosperity across the UK. Ed is a Visiting Professor at Loughborough University.Ed is an experienced Non-Executive Director and Trustee of several charities and holds fellowships of the Institute of Mathematics and its Applications\, the Royal Aeronautical Society\, and the Royal Society for the Arts. \n\n\n\nCheck back on the day of the event for the Teams link.   \n\n\n\nThis will also be streamed in C12\, Monica Partridge Building for those on campus.
URL:https://nottingham-siam-ima.com/event/a-good-mathematician-is-a-lazy-mathematician/
LOCATION:via Microsoft Teams
CATEGORIES:External Speaker Seminars
ATTACH;FMTTYPE=image/png:https://nottingham-siam-ima.com/wp-content/uploads/2021/10/Picture1.png
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BEGIN:VEVENT
DTSTART;TZID=UTC:20211028T130000
DTEND;TZID=UTC:20211028T140000
DTSTAMP:20260424T082704
CREATED:20211004T104316Z
LAST-MODIFIED:20211028T135108Z
UID:423-1635426000-1635429600@nottingham-siam-ima.com
SUMMARY:Footnotes to Turing (1952): Some Modern Challenges in Pattern Formation
DESCRIPTION:Abstract\n\n\n\nMotivated by recent work with biologists\, I will showcase some mathematical results on Turing instabilities in complex domains. This is scientifically related to understanding developmental tuning in a variety of settings such as mouse whiskers\, human fingerprints\, bat teeth\, and more generally pattern formation on multiple scales and evolving domains. Some of these problems are natural extensions of classical reaction-diffusion models\, amenable to standard linear stability analysis\, whereas others require the development of new tools and approaches. These approaches also help close the vast gap between the simple theory of diffusion-driven pattern formation\, and the messy reality of biological development\, though there is still much work to be done in validating even complex theories against the rich dynamics observed in nature. I will emphasize throughout the role that Turing’s 1952 paper had in these developments\, and how much of our modern progress (and difficulties) were predicted in this paper. I will close by discussing a range of open questions\, many of which fall well beyond the extensions I will discuss\, but at least some of which were known to Turing. \n\n\n\n\n\n\n\n\n\n\n\nI grew up in New Mexico\, USA\, where I earned undergraduate degrees in Mathematics and Computer Science at the New Mexico Institute of Mining and Technology in 2012\, and a Masters degree in Mathematical Analysis in 2014. I then obtained a DPhil (PhD) in Mathematics within the Oxford Centre for Industrial and Applied Mathematics in 2018\, and continued as a postdoc in the Wolfson Centre for Mathematical Biology before becoming a Departmental Lecturer in Applied Mathematics jointly between these two groups. I left Oxford in September of this year to join the Department of Mathematical Sciences at Durham University\, where I am an Assistant Professor of Applied Mathematics.  \n\n\n\n\n\nCheck back on the day of the event for the Teams link.  \n\n\n\nThis will also be streamed in A17\, Mathematical Sciences Building for those on campus.
URL:https://nottingham-siam-ima.com/event/footnotes-to-turing-1952-some-modern-challenges-in-pattern-formation/
LOCATION:via Microsoft Teams
CATEGORIES:External Speaker Seminars
ATTACH;FMTTYPE=image/jpeg:https://nottingham-siam-ima.com/wp-content/uploads/2021/10/andrew.jpg
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BEGIN:VEVENT
DTSTART;TZID=UTC:20211014T140000
DTEND;TZID=UTC:20211014T150000
DTSTAMP:20260424T082704
CREATED:20211001T102341Z
LAST-MODIFIED:20211014T143850Z
UID:363-1634220000-1634223600@nottingham-siam-ima.com
SUMMARY:The Mathematics of the Maya (and Other Stories)
DESCRIPTION:Watch the recording below. \n\n\n\n\n\n\n\nIn the United States\, the second Monday of October is commonly referred to as “Columbus Day”\, a holiday meant to commemorate the “discovery” of America by Christopher Columbus in 1492. However\, given the false and problematic nature of this narrative\, many Americans in recent years have begun rebranding this holiday as “Indigenous Peoples’ Day”\, to instead recognize the native people of the Americas who were impacted by imperialism and colonialism. To help honor the occasion\, we’ll be discussing the mathematical achievements of one of the oldest civilizations in the Americas\, the Maya\, who lived in southern Mexico and central America as early as 4\,600 years ago. \n\n\n\nIn this talk\, we will introduce the Maya numeral system\, which is simple enough to only require three symbols\, yet powerful enough to represent large numbers easily and efficiently. We’ll observe how to perform basic arithmetic operations in their system (such as addition and multiplication)\, as well as how to extend their system to capture mathematical ideas that the Maya may have never used (such as rational and real numbers). Then\, we’ll broaden our scope and take a brief tour of numeral systems of other civilizations throughout history and around the world\, looking at their motivations\, benefits\, and disadvantages. By studying these numeral systems comparatively\, we can improve our understanding of our own system of numbers\, appreciate what makes the Maya system unique and useful to this day\, and gain a deeper understanding of civilizations and cultures\, past and present. Also\, if time permits\, we will see what makes the number 252 special. \n\n\n\nThis talk is intended for people of all mathematical backgrounds. No prerequisite knowledge is required. \n\n\n\n\n\n\n\n\n\n\n\nHakim is a Preceptor in the Department of Mathematics at Harvard University\, where he primarily teaches undergraduate students. Originally from New York City\, he attended graduate school at the George Washington University in Washington\, D.C.\, earning his Ph.D in mathematics in 2017. Although his main research areas were in logic and computability theory\, Hakim’s academic interests also include number theory\, recreational mathematics\, philosophy\, the history of mathematics\, and mathematics/STEM education.
URL:https://nottingham-siam-ima.com/event/the-mathematics-of-the-maya-and-other-stories/
LOCATION:via Microsoft Teams and streamed in E02\, Monica Partridge Building
CATEGORIES:External Speaker Seminars
ATTACH;FMTTYPE=image/jpeg:https://nottingham-siam-ima.com/wp-content/uploads/2021/10/Hakim.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/London:20210621T140000
DTEND;TZID=Europe/London:20210621T150000
DTSTAMP:20260424T082704
CREATED:20210610T165132Z
LAST-MODIFIED:20211001T104053Z
UID:111-1624284000-1624287600@nottingham-siam-ima.com
SUMMARY:Mathematicians at War
DESCRIPTION:Abstract\n\n\n\nBritish mathematicians responded to the First World War in a variety of ways.  Some volunteered their mathematical skills for work at the Royal Aircraft Factory where they could experience the risky practice of flying\, while others went to the National Physical Laboratory where\, safely on the ground\, they did experiments using wind tunnels.  Another group joined the Anti-Aircraft Experimental Section of the Ministry of Munitions where they worked on ballistics.  There were also those who followed a military path\, and those who\, for reasons of conscience\, refused to take an active part in the War.  In this talk I’ll discuss the war-time activities of a number of British mathematicians\, and examine the impact of the War on their careers as well as on mathematics itself.
URL:https://nottingham-siam-ima.com/event/mathematicians-at-war/
LOCATION:via Microsoft Teams
CATEGORIES:External Speaker Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/London:20210429T160000
DTEND;TZID=Europe/London:20210429T170000
DTSTAMP:20260424T082704
CREATED:20210610T171417Z
LAST-MODIFIED:20211001T105113Z
UID:127-1619712000-1619715600@nottingham-siam-ima.com
SUMMARY:Modeling sea-ice for climate research and short-term forcasting
DESCRIPTION:Abstract\n\n\n\nThe CICE sea ice model is used extensively by climate and Earth system research groups\, and also by operational centers for applications such as numerical weather prediction and guidance for military operations.  This presentation introduces the physics represented by large-scale sea-ice models\, discusses some of the challenges in applying sea-ice modeling tools developed for research purposes for operational forecasting on short time scales\, and highlights promising new directions in sea-ice modeling. The thread running through this discussion relates to the complexity needed to meet common yet distinct sea ice modeling objectives among different communities.
URL:https://nottingham-siam-ima.com/event/modeling-sea-ice-for-climate-researach-and-short-term-forcasting/
LOCATION:via Microsoft Teams
CATEGORIES:External Speaker Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20210423T130000
DTEND;TZID=UTC:20210423T140000
DTSTAMP:20260424T082704
CREATED:20211001T105235Z
LAST-MODIFIED:20211001T105236Z
UID:402-1619182800-1619186400@nottingham-siam-ima.com
SUMMARY:Multiscale Approaches for Heart Perfusion
DESCRIPTION:Microcirculation and perfusion exemplify the mesoscale in physiological systems\, bridging larger and smaller scale phenomena. Multiscale mathematical models represent a valuable tool to investigate and understand such phenomena\, where a brute force computational approach is not viable yet. For microcirculation accurate models must comprise both interstitial and vascular compartments\, along with their complex morphology. Transport phenomena across the vascular wall couple these two main compartments. In addition\, several nonlinear effects are required to properly model microvascular flow. \n\n\n\nWe apply this framework to human cardiac perfusion\, developing a model that accounts for the different length scales of the vessels in the coronary tree. Epicardial vessels are represented with fully three-dimensional (3D) fluid-dynamics\, whereas intramural vessels are modeled as a multi-compartment porous medium. The coupling of these models takes place through interface conditions based on the continuity of mass and momentum. To estimate the physical parameters of the multi-compartment model\, a virtual intramural vascular network is generated.
URL:https://nottingham-siam-ima.com/event/multiscale-approaches-for-heart-perfusion/
LOCATION:via Microsoft Teams
CATEGORIES:External Speaker Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20210201T150000
DTEND;TZID=UTC:20210201T160000
DTSTAMP:20260424T082704
CREATED:20211001T105150Z
LAST-MODIFIED:20211001T105151Z
UID:397-1612191600-1612195200@nottingham-siam-ima.com
SUMMARY:Stochastic Modelling for Weather and Climate Prediction
DESCRIPTION:Atmospheric models used for weather and climate prediction are traditionally formulated in a deterministic manner. In other words\, given a particular state of the resolved scale variables\, the most likely forcing from the sub-grid scale motion is estimated and used to predict the evolution of the large-scale flow. However\, the lack of scale-separation in the atmosphere means that this approach is a large source of error in forecasts. Over the last decade an alternative paradigm has developed: the use of stochastic techniques to represent small-scale processes. These techniques are now ubiquitous in weather and seasonal forecasting centres worldwide. However their formulation remains ad hoc\, with little evolution in operational schemes since the earliest approaches. In this presentation I will consider the challenge of developing stochastic parametrisation schemes that skilfully mimic unresolved\, small-scale processes\, and the potential of very high-resolution simulations to indicate the form that stochastic schemes should take. I will conclude by discussing experiments in two climate models that demonstrate the potential for improving climate simulations by using stochastic approaches. 
URL:https://nottingham-siam-ima.com/event/stochastic-modelling-for-weather-and-climate-prediction/
LOCATION:via Microsoft Teams
CATEGORIES:External Speaker Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20181129T160000
DTEND;TZID=UTC:20181129T180000
DTSTAMP:20260424T082704
CREATED:20211001T104513Z
LAST-MODIFIED:20211001T104518Z
UID:377-1543507200-1543514400@nottingham-siam-ima.com
SUMMARY:Women-in-Maths Seminar
DESCRIPTION:
URL:https://nottingham-siam-ima.com/event/women-in-maths-seminar/
LOCATION:C27\, Physics Building
CATEGORIES:External Speaker Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20180605T170000
DTEND;TZID=UTC:20180605T190000
DTSTAMP:20260424T082704
CREATED:20211001T104254Z
LAST-MODIFIED:20211001T104255Z
UID:371-1528218000-1528225200@nottingham-siam-ima.com
SUMMARY:Spectral /hp Element\, Scale Resolving Modelling for High Reynolds Number Motorsport Flow Simulations
DESCRIPTION:
URL:https://nottingham-siam-ima.com/event/spectral-hp-element-scale-resolving-modelling-for-high-reynolds-number-motorsport-flow-simulations/
LOCATION:B60\, Keighton Auditorium
CATEGORIES:External Speaker Seminars
END:VEVENT
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