1,061 research outputs found
Is Zionism an Integral Part of Judaism?
No full textOn 11 September 2012, the American philosopher Judith Butler received the renowned Theodor W. Adorno Award of the City of Frankfurt am Main for her work in philosophy. Her theory of performative gender challenges fixed gender roles, forced sexual orientation and racist ideology while promoting a universal code of ethics. As a woman, a Jew, and an intellectual Butler rejects the reduction of Judaism to a nationalist definition of Zionism. A radical pacifist, she is committed to movements that fight – peacefully, albeit with unorthodox strategies – to find political solutions that ensure a basis of equal rights for all people in those lands, for Israelis and Palestinians alike. Programme Welcome: Cilly Kugelmann, Christoph F. E. Holzhey Diskussion: Judith Butler and Micha Brumlik Moderation: Andreas Öhle
F 266 John B. Wayland (1821-1854) and Micha Wayland (1823-1901) Headstone
No full text1 photograph; Color; Personal photograph taken by Sharon E. Neet, June 1987, of the headstone for John B. Wayland and Micha Wayland in Versailles City Cemetery, Versailles, Indiana. The inscription on the headstone reads: Mother, Father. John B. Wayland, 1821-1854. Micha Wayland, 1823-1901.https://digitalcommons.pittstate.edu/wayland/1151/thumbnail.jp
Território-corpo em retomada: práticas e saberes das plantas na construção de autonomia e cura das dissidências de gênero e sexualidade
No full textDIOGO, Micha. Território-corpo em retomada: práticas e saberes das plantas na construção de autonomia e cura das dissidências de gênero e sexualidade. 2022. 16 f. Trabalho de Conclusão de Curso (Bacharelado em Humanidades) - Instituto de Humanidades e Letras dos Malês, Universidade da Integração Internacional da Lusofonia Afro-Brasileira, São Francisco do Conde, 2022
Improved Algebraic Degeneracy Testing
No full textIn the classical linear degeneracy testing problem, we are given n real numbers and a k-variate linear polynomial F, for some constant k, and have to determine whether there exist k numbers a_1,…,a_k from the set such that F(a_1,…,a_k) = 0. We consider a generalization of this problem in which F is an arbitrary constant-degree polynomial, we are given k sets of n real numbers, and have to determine whether there exists a k-tuple of numbers, one in each set, on which F vanishes. We give the first improvement over the naïve O^*(n^{k-1}) algorithm for this problem (where the O^*(⋅) notation omits subpolynomial factors).
We show that the problem can be solved in time O^*(n^{k - 2 + 4/(k+2)}) for even k and in time O^*(n^{k - 2 + (4k-8)/(k²-5)}) for odd k in the real RAM model of computation. We also prove that for k = 4, the problem can be solved in time O^*(n^2.625) in the algebraic decision tree model, and for k = 5 it can be solved in time O^*(n^3.56) in the same model, both improving on the above uniform bounds.
All our results rely on an algebraic generalization of the standard meet-in-the-middle algorithm for k-SUM, powered by recent algorithmic advances in the polynomial method for semi-algebraic range searching. In fact, our main technical result is much more broadly applicable, as it provides a general tool for detecting incidences and other interactions between points and algebraic surfaces in any dimension. In particular, it yields an efficient algorithm for a general, algebraic version of Hopcroft’s point-line incidence detection problem in any dimension
Incidences Between Points and Curves with Almost Two Degrees of Freedom
No full textWe study incidences between points and (constant-degree algebraic) curves in three dimensions, taken from a family C of curves that have almost two degrees of freedom, meaning that (i) every pair of curves of C intersect in O(1) points, (ii) for any pair of points p, q, there are only O(1) curves of C that pass through both points, and (iii) a pair p, q of points admit a curve of C that passes through both of them if and only if F(p,q)=0 for some polynomial F of constant degree associated with the problem. (As an example, the family of unit circles in ℝ³ that pass through some fixed point is such a family.)
We begin by studying two specific instances of this scenario. The first instance deals with the case of unit circles in ℝ³ that pass through some fixed point (so called anchored unit circles). In the second case we consider tangencies between directed points and circles in the plane, where a directed point is a pair (p,u), where p is a point in the plane and u is a direction, and (p,u) is tangent to a circle γ if p ∈ γ and u is the direction of the tangent to γ at p. A lifting transformation due to Ellenberg et al. maps these tangencies to incidences between points and curves ("lifted circles") in three dimensions. In both instances we have a family of curves in ℝ³ with almost two degrees of freedom.
We show that the number of incidences between m points and n anchored unit circles in ℝ³, as well as the number of tangencies between m directed points and n arbitrary circles in the plane, is O(m^(3/5)n^(3/5)+m+n) in both cases.
We then derive a similar incidence bound, with a few additional terms, for more general families of curves in ℝ³ with almost two degrees of freedom, under a few additional natural assumptions.
The proofs follow standard techniques, based on polynomial partitioning, but they face a critical novel issue involving the analysis of surfaces that are infinitely ruled by the respective family of curves, as well as of surfaces in a dual three-dimensional space that are infinitely ruled by the respective family of suitably defined dual curves. We either show that no such surfaces exist, or develop and adapt techniques for handling incidences on such surfaces.
The general bound that we obtain is O(m^(3/5)n^(3/5)+m+n) plus additional terms that depend on how many curves or dual curves can lie on an infinitely-ruled surface
Gazera heliconioides subsp. micha H. Druce 1896
No full textGazera heliconioides micha (H. Druce, 1896) (Fig. 13) Castnia micha (H. Druce, 1896) Taxonomic history. Described in the genus Castnia by Druce (1896) but later included in the genus Cabirus by Houlbert (1918). Talbot (1919) mentions that micha “can only be considered as a race and not as a distinct species”. Distribution. This subspecies is known from Bolivia, Paraguay and South East Brazil (Miller 1986; Lamas 1995; Rothschild 1919). Jörgensen (1930) states that it is common in all the Eastern region of Paraguay. It is, apparently, together with Castnia invaria penelope, the commonest castniid species in Paraguay. Jörgensen (1930) mentions that it flies in forested areas, near bromeliads (Bromelia sp. and Ananas sp.). It is frequently found perching close to the ground at the base of leaves or grasses and the way the moth rests and its wing and body coloration (Fig. 20 b) allows it to “disappear” in the surroundings. The first author observed individuals flying in urban places of Asunción, the capital city of Paraguay. He also observed them flying in Sapucay, Paraguarí Department and in Cerro Corá, Amambay Department. Ulf Drechsel (pers. comm.) collected and observed specimens in Sapucay, Paraguarí Department, and in Areguá, Central Department; while Contreras (2009) collected them in Ñeembucú Department. Biology and behavior. Like all taxa in the genus, they have a close resemblance to members of Lycorea Doubleday (Nymphalidae: Danainae), Thyridia Hübner and Methona Doubleday (Nymphalidae: Danainae, Ithomiini), and to Notophyson heliconides (Swainson) (Erebidae: Arctiinae, Pericopini) (Miller 1986; Lamas 1973). Two males were observed by the first author in Paraguarí and Amambay Departments, while flying low and slowly, along paths surrounded with Bromelia balansae Mez, which allowed for easy collection. They also perched close to the ground (Fig. 21). These observations clearly contrast with those made by Contreras (2009) in more disturbed habitats, where specimens were found flying fast, strongly and very high (7–8 m above ground).The host plant is unknown, but we suspect that the larvae feed on Bromelia spp. and/or Ananas spp. Contreras (2009) mentions that Orchidaceae could also be hosts of this species. Material examined. 13, Castnia micha Druce, 494, Paraguay (SMNH). CORDILLERA: Caacupé, 22.IX. 1969 (FCA/ DE); 1 Ƥ, Atyrá, X. 2002, Coll. C.Aguilar (MNHNPY). GUAIRÁ: 233,1 Ƥ, “ Paraguay, Independencia”, A. Breyer Collection (MLP); 13, 1 Ƥ, Carlos Pfannl, Paraguay, no date (TPC). CAAGUAZÚ: Coronel Oviedo, 25.X. 1972 (FCA/ DE); 13, “ Paraguay, Caa-Guazú”, XII- 1948, Coll. F.H. Schade, A. Breyer Collection (MLP);. PARAGUARÍ: 13, Sapucay. 8. X. 2008. Coll. S.Ríos (MNHNPY); 13, Sapucay, Paraguay 8.XI. 1997. Coll. U. Drechsel (MNHNPY); 13, Sapucay, Oct. 24, [1] 900 (NHMUM). CENTRAL: San Lorenzo, 23.X. 1985 Coll. J.Estigarribia (FCA/ DE). ÑEEMBUCÚ: 13, Distrito Humaitá, Arroyo Franco Cué, 15.XI. 2006 (IBIS, 1719) (IBIS-UNP); 13, Distrito Isla Umbú, Arroyo Hondo, paraje Itá Cajón, 13.XII. 2006 (IBIS, 2109) (IBIS-UNP). AMAMBAY: 13, Parque Nacional Cerro Corá, 25.X. 2009 Coll. S.Ríos (MNHNPY).Published as part of Ríos, Sergio D. & González, Jorge M., 2011, A synopsis of the Castniidae (Lepidoptera) of Paraguay, pp. 43-61 in Zootaxa 3055 on pages 53-54, DOI: 10.5281/zenodo.27891
Codenames: a practical application for modelling word association
No full textMicha de Rijk January 6, 2020 Word association is an important part of human language. Many techniques for capturing semantic relations between words exist, but their ability to model word associations is rarely tested. We introduce the game of Codenames with one human player as a word association task to evaluate how well a language model captures this information. We establish the baseline f-score of 0.362 and explore the performance of several collocations and word embedding models on this task. Our best model uses fastText word embeddings and achieves an f-score of 0.789 for Czech and 0.751 for English.
On Rich Points and Incidences with Restricted Sets of Lines in 3-Space
No full textLet L be a set of n lines in ℝ³ that is contained, when represented as points in the four-dimensional Plücker space of lines in ℝ³, in an irreducible variety T of constant degree which is non-degenerate with respect to L (see below). We show:
(1) If T is two-dimensional, the number of r-rich points (points incident to at least r lines of L) is O(n^{4/3+ε}/r²), for r ⩾ 3 and for any ε > 0, and, if at most n^{1/3} lines of L lie on any common regulus, there are at most O(n^{4/3+ε}) 2-rich points. For r larger than some sufficiently large constant, the number of r-rich points is also O(n/r).
As an application, we deduce (with an ε-loss in the exponent) the bound obtained by Pach and de Zeeuw [J. Pach and F. de Zeeuw, 2017] on the number of distinct distances determined by n points on an irreducible algebraic curve of constant degree in the plane that is not a line nor a circle.
(2) If T is two-dimensional, the number of incidences between L and a set of m points in ℝ³ is O(m+n).
(3) If T is three-dimensional and nonlinear, the number of incidences between L and a set of m points in ℝ³ is O (m^{3/5}n^{3/5} + (m^{11/15}n^{2/5} + m^{1/3}n^{2/3})s^{1/3} + m + n), provided that no plane contains more than s of the points. When s = O(min{n^{3/5}/m^{2/5}, m^{1/2}}), the bound becomes O(m^{3/5}n^{3/5}+m+n).
As an application, we prove that the number of incidences between m points and n lines in ℝ⁴ contained in a quadratic hypersurface (which does not contain a hyperplane) is O(m^{3/5}n^{3/5} + m + n).
The proofs use, in addition to various tools from algebraic geometry, recent bounds on the number of incidences between points and algebraic curves in the plane
Micha Ullman: specific and general
No full textTento text si klade za cíl předvést důležitou edukační interpretační praxi,která souvisí s analýzou edukovaného díla, totiž s budováním zdůvodněnéhokontextu pro vybranou strategii. V první části textu Micha Ullman: sochyna rozhraní nebe – země prozkoumáme dílo autora, který začal tvořit v se-dmdesátých letech a jeho tvorba je kontinuálně vystavována.V druhé části Strategie a její variace: nalezení shodného při vědomí odliš-ností teoreticky zakotvíme odlišnost mezi konkrétní praxí autora a strategiíjako objevenou obecninou. Objevovat strategie, umět je chápat ve spojitostis určitou dobou, znamená, že při významných shodách zároveň zazname-náváme odlišnosti a vsazujeme jev do adekvátního kontextu. Je to jednakvelmi účinná edukativní možnost, jak chápat dějiny oboru v souvislostecha trsech a neutápět se v jednotlivých případech autorských řešení, ale takémožnost, jak pro jednotlivé autory získat výkladový rámec porovnáváníma vyhledáváním shod při podstatných odlišnostech s jinými.This text aims to demonstrate an important educational interpretation prac-tice that is related to the analysis of the educated work, namely to buildinga justified context for the chosen strategy. In the first part of the text MichaUllman: sculptures at the interface of heaven and earth, we will explore thework of the author, who started creating in the seventies and whose workis continuously exhibited.In the second part, Strategy and its variations: finding the same whilebeing aware of differences, we theoretically anchor the difference betweenthe specific practice of the author and strategy as a discovered generality.Discovering strategies, being able to understand them in connection witha certain time, means that in case of significant similarities, we simultaneou-sly note differences and place the phenomenon in an adequate context. It is,on the one hand, a very effective educational opportunity to understand thehistory of the field in contexts and clusters and not to get bogged down inindividual cases of authorial solutions, but also an opportunity to obtain aninterpretive framework for individual authors by comparing and searchingfor similarities in substantial differences with others
Polynomials Vanishing on Cartesian Products: The Elekes-Szabó Theorem Revisited
No full textLet F in Complex[x,y,z] be a constant-degree polynomial, and let A,B,C be sets of complex numbers with |A|=|B|=|C|=n. We show that F vanishes on at most O(n^{11/6}) points of the Cartesian product A x B x C (where the constant of proportionality depends polynomially on the degree of F), unless F has a special group-related form. This improves a theorem of Elekes and Szabo [ES12], and generalizes a result of Raz, Sharir, and Solymosi [RSS14a]. The same statement holds over R. When A, B, C have different sizes, a similar statement holds, with a more involved bound replacing O(n^{11/6}).
This result provides a unified tool for improving bounds in various Erdos-type problems in combinatorial geometry, and we discuss several applications of this kind
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