David Craven

ORCID: 0000-0003-1108-5698
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About
Contact & Profiles
Research Areas
  • Finite Group Theory Research
  • Advanced Algebra and Geometry
  • Algebraic structures and combinatorial models
  • Art, Politics, and Modernism
  • Advanced Topics in Algebra
  • Magnetic confinement fusion research
  • Coding theory and cryptography
  • Algebraic Geometry and Number Theory
  • Fusion materials and technologies
  • Geometric and Algebraic Topology
  • graph theory and CDMA systems
  • Homotopy and Cohomology in Algebraic Topology
  • Photographic and Visual Arts
  • Visual Culture and Art Theory
  • Advanced Combinatorial Mathematics
  • Superconducting Materials and Applications
  • Rings, Modules, and Algebras
  • Art History and Market Analysis
  • Cultural Industries and Urban Development
  • Synthesis and Characterization of Heterocyclic Compounds
  • Historical Art and Culture Studies
  • semigroups and automata theory
  • Laser-Plasma Interactions and Diagnostics
  • Advanced Operator Algebra Research
  • Online and Blended Learning

University of Birmingham
2015-2024

Culham Science Centre
2022-2024

Culham Centre for Fusion Energy
2021-2024

University Research Co (United States)
2021-2023

United Kingdom Atomic Energy Authority
2022

UCLA Health
2020

Polytechnic University of Nicaragua
2016

Lam Research (United States)
2014

Lam Research (Austria)
2012

University of Oxford
2007-2011

Abstract A series of experiments have been executed at JET to assess the efficacy newly installed shattered pellet injection (SPI) system in mitigating effects disruptions. Issues, important for ITER disruption mitigation system, such as thermal load mitigation, avoidance runaway electron (RE) formation, radiation asymmetries during quench electromagnetic control and RE energy dissipation addressed over a large parameter range. The efficiency has examined various SPI strategies. paper...

10.1088/1741-4326/ac3c86 article EN Nuclear Fusion 2021-11-23

10.1016/j.aim.2013.07.010 article EN publisher-specific-oa Advances in Mathematics 2013-08-23

Abstract Runaway electrons (REs) created during tokamak disruptions pose a threat to the reliable operation of future larger machines. Experiments using shattered pellet injection (SPI) have been carried out at JET investigate ways prevent their generation or suppress them if avoidance is not sufficient. Avoidance possible SPI contains sufficiently low fraction high-Z material, it fired early in advance disruption prone runaway generation. These results are consistent with previous similar...

10.1088/1361-6587/ac48bc article EN Plasma Physics and Controlled Fusion 2022-01-06

Shattered pellet injection (SPI) systems that form cryogenic pellets in a pipe-gun for of material to mitigate disruptions have been fabricated and installed use thermal mitigation runaway electron (RE) dissipation experiments on JET KSTAR. These are support disruption research ITER based an ORNL three-barrel design flexibility size selection variable composition studies. The SPI KSTAR common feature the barrels being collimated into single line enters vacuum vessel. shattered bent stainless...

10.1088/1741-4326/ac1bc3 article EN Nuclear Fusion 2021-08-09

In this article we study several classes of ‘small’ <inline-formula content-type="math/mathml"> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="2"> <mml:semantics> <mml:mn>2</mml:mn> <mml:annotation encoding="application/x-tex">2</mml:annotation> </mml:semantics> </mml:math> </inline-formula>-groups: complete the classification, started by Stancu, all saturated fusion systems on metacyclic alttext="p"> <mml:mi>p</mml:mi> encoding="application/x-tex">p</mml:annotation>...

10.1090/s0002-9947-2012-05580-2 article EN publisher-specific-oa Transactions of the American Mathematical Society 2012-05-24

(1996). The Latin American origins of ‘alternative modernism’. Third Text: Vol. 10, No. 36, pp. 29-44.

10.1080/09528829608576623 article EN Third Text 1996-09-01

We study embeddings of groups Lie type <inline-formula content-type="math/mathml"> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="upper H"> <mml:semantics> <mml:mi>H</mml:mi> <mml:annotation encoding="application/x-tex">H</mml:annotation> </mml:semantics> </mml:math> </inline-formula> in characteristic alttext="p"> <mml:mi>p</mml:mi> encoding="application/x-tex">p</mml:annotation> into exceptional algebraic alttext="bold upper G"> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:mi...

10.1090/memo/1434 article EN Memoirs of the American Mathematical Society 2023-08-01

Abstract This article produces a complete list of all maximal subgroups the finite simple groups type $F_{4}$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mi>F</mml:mi> <mml:mn>4</mml:mn> </mml:msub> </mml:math> , $E_{6}$ <mml:mi>E</mml:mi> <mml:mn>6</mml:mn> and twisted over fields. Along way, we determine collection Lie primitive almost corresponding algebraic groups. We give stabilizers under actions outer automorphisms, from which one can obtain information...

10.1007/s00222-023-01208-2 article EN cc-by Inventiones mathematicae 2023-07-12

Introduction 1. Various legacies and diverse lineages 2. Abstract expressionism left wing values 3. The FBI files on the New York school 4. Mythmaking in McCarthy period 5. Automatism age of automation 6. A critique technologism.

10.5860/choice.37-0716 article EN Choice Reviews Online 1999-10-01

In this article we prove the following result: for any two natural numbers k and ℓ, all sufficiently large symmetric groups Sn, there are disjoint sets of ℓ irreducible characters such that each set consists with same degree, distinct have different degrees. particular, resolves a conjecture most recently made by Moretó in [5]. The methods employed here based upon duality between partitions to which they correspond. Consequently, paper is combinatorial nature.

10.1112/plms/pdm028 article EN Proceedings of the London Mathematical Society 2007-08-11

Treatment of (S)-4,5-isopropylidenedioxypentanonitrile 17 with ethyl formate and sodium hydride gave a hydroxymethylene derivative which interacted aminoacetonitrile to give 3-cyanomethyleneamin-2-[(S)-isopropylidenedioxypropyl]acrylonitrile 19; this was elaborated via 3-amino-2-cyano-4-[(S)-2,3-isopropylidenedioxypropyl]pyrrole 22 into 4-amino-7-[(S)-2,3-dihydroxypropyl]pyrrolo[3,2-d]pyrimidine 9. the methanesulphonyl chloride, followed by acetylthioacetonitrile carbonate in ethanol...

10.1039/p19910000195 article EN Journal of the Chemical Society. Perkin transactions I/Journal of the Chemical Society. Perkin transactions. I 1991-01-01

10.1016/j.jalgebra.2010.02.025 article EN publisher-specific-oa Journal of Algebra 2010-03-05

10.5860/choice.35-3686 article Choice Reviews Online 1998-03-01

What are educators' motivations for using virtual worlds with their students? Are they them to support the teaching of professions and if this is case, do introduce into curriculum develop and/or expand students' professional learning networks? transform learning? In recognition exciting opportunities that present higher education, DEHub Virtual Worlds Working Group was formed. It made up Australian university academics who investigating role will play in future education actively...

10.14742/apubs.2010.2028 article EN ASCILITE Publications 2010-12-01

10.1016/j.aim.2017.10.001 article EN publisher-specific-oa Advances in Mathematics 2017-11-13
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