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36,882
result(s) for
"mirror"
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Noncommutative Homological Mirror Functor
by
Lau, Siu-Cheong
,
Cho, Cheol-Hyun
,
Hong, Hansol
in
Algebraic geometry -- Surfaces and higher-dimensional varieties -- Mirror symmetry. msc
,
Differential geometry -- Symplectic geometry, contact geometry -- Mirror symmetry, symplectic aspects; homological mirror symmetry; Fukaya category. msc
,
Functor theory
2021
We formulate a constructive theory of noncommutative Landau-Ginzburg models mirror to symplectic manifolds based on Lagrangian Floer
theory. The construction comes with a natural functor from the Fukaya category to the category of matrix factorizations of the
constructed Landau-Ginzburg model. As applications, it is applied to elliptic orbifolds, punctured Riemann surfaces and certain
non-compact Calabi-Yau threefolds to construct their mirrors and functors. In particular it recovers and strengthens several interesting
results of Etingof-Ginzburg, Bocklandt and Smith, and gives a unified understanding of their results in terms of mirror symmetry and
symplectic geometry. As an interesting application, we construct an explicit global deformation quantization of an affine del Pezzo
surface as a noncommutative mirror to an elliptic orbifold.
Lucrezia Borgia alla luce trasmessa
by
Spiezia, Maria Chiara
in
Mirrors
2023
The article analyses the complex digitisation project of Lucrezia Borgia's letters and registers recently carried out by the tech company Haltadefinizione at the State Archive of Modena. In addition to gigapixel acquisition, this case also involved the use of transmitted light digitisation in ultra-high resolution, allowing the unveiling of the watermarks in the documents. The article explores various methodologies used in the digitisation campaign and emphasises how these advanced high-resolution imaging techniques are a fundamental tool for preserving and making these valuable historical documents accessible.
Journal Article
Inside Black Mirror
\"The first official companion to the Emmy-winning Netflix cult-hit sci-fi television series that's fascinated millions of fans worldwide, with stunning visuals and never before seen behind-the-scenes content. What becomes of humanity when it's fed into the jaws of a hungry new digital machine? Discover the world of Black Mirror in this immersive, illustrated, oral history. This first official book logs the entire Black Mirror journey, from its origins in creator Charlie Brooker's mind to its current status as one of the biggest cult TV shows to emerge from the UK. Alongside a collection of astonishing behind-the-scenes imagery and ephemera, Brooker and producer Annabel Jones will detail the creative genesis, inspiration, and thought process behind each film for the first time, while key actors, directors and other creative talents relive their own involvement\"-- Provided by publisher.
Measurements of fusion yield on the Centrifugal Mirror Fusion Experiment
by
van de Lindt, J.G.
,
Mackie, S.
,
Tinguely, R.A.
in
Calibration
,
centrifugal mirror
,
Confinement
2026
The Centrifugal Mirror Fusion Experiment (CMFX) at the University of Maryland, College Park is a rotating mirror device that utilizes a central cathode to generate a radial electric field which induces a strongly sheared azimuthal E × B flow to improve plasma confinement and stability. The fusion yield of CMFX plasmas is assessed by diagnosis of neutron emission for the first time. The total neutron yield is measured with two xylene (EJ-301) and deuterated-xylene (EJ-301D) liquid scintillator detectors absolutely calibrated with an in silico method. A larger xylene scintillator was cross-calibrated and used to measure the time dynamics of the fusion rate under various experimental conditions. A permanently installed 3He gas tube detector was independently calibrated with a Cf-252 neutron source to make total yield measurements and provide an independent validation of the scintillator calibration. An interpretive modeling framework was developed using the 0D code MCTrans++ (Schwartz et al 2024 J. Plasma Phys. 90 905900217) to infer undiagnosed plasma parameters such as density, temperature, and confinement time. A peak neutron emission rate of 8.4×106±7.0×105 was measured (neglecting modeling uncertainties), with an inferred triple product of 1.9×1017 m−3 keV s from 0D modeling.
Journal Article
Theta functions on varieties with effective anti-canonical class
by
Hacking, Paul
,
Siebert, Bernd
,
Gross, Mark
in
Algebraic geometry -- Surfaces and higher-dimensional varieties -- Calabi-Yau manifolds msc
,
Algebraic geometry -- Surfaces and higher-dimensional varieties -- Fano varieties msc
,
Algebraic geometry -- Surfaces and higher-dimensional varieties -- Mirror symmetry msc
2022
We show that a large class of maximally degenerating families of
We anticipate that wall structures can be
constructed quite generally from maximal degenerations. The construction given here then provides the homogeneous coordinate ring of the
mirror degeneration along with a canonical basis. The appearance of a canonical basis of sections for certain degenerations points
towards a good compactification of moduli of certain polarized varieties via stable pairs, generalizing the picture for K3 surfaces
[Gross, Hacking, Keel, and Siebert,
Axial confinement in the Novatron mirror machine
2025
The Novatron magnetic mirror fusion reactor concept features significant advantages. These include stability against MHD interchange and kinetic drift cyclotron loss cone modes, axisymmetry, and minimized radial particle drifts and neoclassical losses. For achieving a ratio Q⩾30 of fusion power to heating power, axial particle confinement is uniquely designed to rely on the simultaneous use of three distinct forces; magnetic mirrors, electrostatic potentials, and ponderomotive forces in a tandem-like configuration. Axial confinement physics theory is here analyzed and compared to earlier mirror configurations. Scenarios for D-T, D-D, and catalyzed D-D fusion plasmas are outlined.
Journal Article
The mirror mechanism: recent findings and perspectives
2014
Mirror neurons are a specific type of visuomotor neuron that discharge both when a monkey executes a motor act and when it observes a similar motor act performed by another individual. In this article, we review first the basic properties of these neurons. We then describe visual features recently investigated which indicate that, besides encoding the goal of motor acts, mirror neurons are modulated by location in space of the observed motor acts, by the perspective from which the others’ motor acts are seen, and by the value associated with the object on which others’ motor acts are performed. In the last part of this article, we discuss the role of the mirror mechanism in planning actions and in understanding the intention underlying the others’ motor acts. We also review some human studies suggesting that motor intention in humans may rely, as in the monkey, on the mirror mechanism.
Journal Article
Mammalian empathy: behavioural manifestations and neural basis
2017
Key Points
Observational and experimental studies dating back to the 1950s demonstrate that mammals spontaneously help distressed conspecifics. Research emphasizes the untrained, unrewarded nature of this behaviour, which is also biased towards familiar individuals, thus arguing against explanations that are exclusively based on associative learning or conditioning.
The perception–action model extends an existing motor theory on overlapping representations to emotional phenomena; it states that observers who attend to a target's state understand and 'feel into' it through personal distributed representations of the target, the state and the situation. Easily observed manifestations of this mechanism are emotional contagion and motor mimicry, which have been demonstrated in many animals. In cognitive forms of empathy, the same representations are accessed from the top-down.
Experiments on two common mammalian expressions of empathy — the consolation of distressed individuals and spontaneous assistance to those in need — support the crucial role of caught distress and arousal because these behaviours are suppressed by anti-anxiety medication and engage the same neuropeptide system that supports social attachment.
The Russian-doll model seeks to arrange forms of empathy into layers that are built on top of each other — with the layers ranging from emotional contagion to more cognitive forms of empathy — in a functionally integrated whole based on perception–action processes. Perspective-taking is well developed in some non-human species, as manifested by theory-of-mind and targeted helping.
One can segregate emotional and cognitive empathy (as well as felt and observed states) in the brains of observers, but all forms require some initial access to the observer's distributed, shared, personal representations of the target's state. At least in the initial phase of processing, this access helps to decode the target's state and provide subsequent processing with content and meaning, even if the shared state is not experienced, or is incomplete or inaccurate.
Empathic pain does not usually include the peripheral sensation of the target's injury, but it can include sensory information when the stimuli and task instructions emphasize the specific nature of the feeling at the location of the injury.
Empathy is a characteristic of all mammals that ranges from being sensitive to another's emotions to adopting their perspective. In this Review, de Waal and Preston discuss current hypotheses concerning how the emotional states of others are understood in a variety of species.
Recent research on empathy in humans and other mammals seeks to dissociate emotional and cognitive empathy. These forms, however, remain interconnected in evolution, across species and at the level of neural mechanisms. New data have facilitated the development of empathy models such as the perception–action model (PAM) and mirror-neuron theories. According to the PAM, the emotional states of others are understood through personal, embodied representations that allow empathy and accuracy to increase based on the observer's past experiences. In this Review, we discuss the latest evidence from studies carried out across a wide range of species, including studies on yawn contagion, consolation, aid-giving and contagious physiological affect, and we summarize neuroscientific data on representations related to another's state.
Journal Article