5,438 research outputs found
Validity condition for high-fidelity Digitized Quantum Annealing
No full text10 pages and 4 figuresDigitizing an adiabatic evolution is a strategy able to combine the good
performance of gate-based quantum processors with the advantages of adiabatic
algorithms, providing then a hybrid model for efficient quantum information
processing. In this work we develop validity conditions for high fidelity
digital adiabatic tasks. To this end, we assume a digitizing process based on
the Suzuki-Trotter decomposition, which allows us to introduce a Digitized
Adiabatic Theorem. As consequence of this theorem, we show that the performance
of such a hybrid model is limited by the fundamental constraints on the
adiabatic theorem validity, even in ideal quantum processors. We argue how our
approach predicts the existence of intrinsic non-adiabatic errors reported by
R. Barends et al., Nature 534, 222 (2016) through an empirical study of digital
annealing. In addition, our approach allows us to explain the existence of a
scaling of the number of Suzuki-Trotter blocks for the optimal digital circuit
with respect to the optimal adiabatic total evolution time, as reported by G.
B. Mbeng et al., Phys. Rev. B 100, 224201 (2019) through robust numerical
analysis of digital annealing. We illustrate our results through two examples
of digitized adiabatic algorithms, namely, the two-qubits exact-cover problem
and the three-qubits adiabatic factorization of the number 21.The author is supported by the Comunidad de Madrid through the research funding program Talento 2024“César’ Nombela” under the Grant No. 2024-T1/COM-31530. The author acknowledges the partial support from the European Union’s Horizon 2020 FET-Open project SuperQuLAN (899354) and from Proyecto Sinérgico CAM2020 Y2020/TCS-6545(NanoQuCo-CM) from the Comunidad de Madrid.Peer reviewe
Alan Moore Comics as Performance, Fiction as Scalpel
No full textEclectic British author Alan Moore (b. 1953) is one of the most acclaimed and controversial comics writers to emerge since the late 1970s. He has produced a large number of well-regarded comic books and graphic novels while also making occasional forays into music, poetry, performance, and prose. In Alan Moore: Comics as Performance, Fiction as Scalpel , Annalisa Di Liddo argues that Moore employs the comics form to dissect the literary canon, the tradition of comics, contemporary society, and our understanding of history. The book considers Moore's narrative strategies and pinpoints the main thematic threads in his works: the subversion of genre and pulp fiction, the interrogation of superhero tropes, the manipulation of space and time, the uses of magic and mythology, the instability of gender and ethnic identity, and the accumulation of imagery to create satire that comments on politics and art history. Examining Moore's use of comics to scrutinize contemporary culture, Di Liddo analyzes his best-known works-- Swamp Thing, V for Vendetta, Watchmen, From Hell, Promethea , and Lost Girls . The study also highlights Moore?s lesser-known output, such as Halo Jones, Skizz , and Big Numbers , and his prose novel Voice of the Fire. Alan Moore: Comics as Performance, Fiction as Scalpel reveals Moore to be one of the most significant and distinctly postmodern comics creators of the last quarter-century.Intro -- Contents -- Preface and Acknowledgments -- Introduction -- CHAPTER 1. Formal Considerations on Alan Moore's Writing -- CHAPTER 2. Chronotopes: Outer Space, the Cityscape, and the Space of Comics -- CHAPTER 3. Moore and the Crisis of English Identity -- CHAPTER 4. Finding a Way into Lost Girls -- Conclusion -- Notes -- Bibliography -- Index -- A -- B -- C -- D -- E -- F -- G -- H -- I -- J -- K -- L -- M -- N -- O -- P -- Q -- R -- S -- T -- U -- V -- W -- Y -- ZEclectic British author Alan Moore (b. 1953) is one of the most acclaimed and controversial comics writers to emerge since the late 1970s. He has produced a large number of well-regarded comic books and graphic novels while also making occasional forays into music, poetry, performance, and prose. In Alan Moore: Comics as Performance, Fiction as Scalpel , Annalisa Di Liddo argues that Moore employs the comics form to dissect the literary canon, the tradition of comics, contemporary society, and our understanding of history. The book considers Moore's narrative strategies and pinpoints the main thematic threads in his works: the subversion of genre and pulp fiction, the interrogation of superhero tropes, the manipulation of space and time, the uses of magic and mythology, the instability of gender and ethnic identity, and the accumulation of imagery to create satire that comments on politics and art history. Examining Moore's use of comics to scrutinize contemporary culture, Di Liddo analyzes his best-known works-- Swamp Thing, V for Vendetta, Watchmen, From Hell, Promethea , and Lost Girls . The study also highlights Moore?s lesser-known output, such as Halo Jones, Skizz , and Big Numbers , and his prose novel Voice of the Fire. Alan Moore: Comics as Performance, Fiction as Scalpel reveals Moore to be one of the most significant and distinctly postmodern comics creators of the last quarter-century.Description based on publisher supplied metadata and other sources.Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, YYYY. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries
Activation of Aryl C-H and C-X bonds by a pincer-ligated 'PCP' iridium complex
No full textThe activation of carbon-hydrogen (C-H) bonds mediated by transition metal complexes is a fundamental step in a vast array of chemical transformations and industrial processes. As such, research into the understanding of the factors governing both efficiency and selectivity of these reactions has been intense. The work presented in this thesis comprises results of experiments designed to evaluate the ability of a pincer-ligated iridium complex to activate the C-H bonds of several classes of aryl substrates. The pincer-ligated iridium fragment (PCP)Ir (PCP = {κ3-2,6-bis[(di-tert-butylphosphino)methyl]phenyl}) rapidly and reversibly adds the C-H bond of benzene, giving a kinetically labile addition product. The kinetics and thermodynamics of C-H activation of a series of halogen-, alkyl-, and trifluoromethyl-substituted arenes were studied with a particular focus on determining whether “directing” effects play a significant role. In regard to electronic effects, it was observed that electron withdrawing aryl substituents favor C-H activation. Products of C-H activation ortho to weakly or non-coordinating substituents (e.g., Cl, Br, CF3) are kinetically more stable than those of the meta- and para-substituted analogs, due to steric crowding in the transition state for addition and elimination. However, there is no thermodynamic preference for the ortho-substituted complexes. In addition to C-H activation, (PCP)Ir also activates C-X bonds (X = Cl, Br) under certain conditions, yielding product mixtures through a mechanism that remains unclear. Several series of polycyclic aromatic substrates (naphthalenes, biphenyls, bipyridines, and associated tricyclic analogs) were also studied, giving insight into the utility of aryl C-H activation and preferred binding modes of the (PCP)Ir fragment. Not surprisingly, steric effects play a significant role in the regioselectivity of polycyclic aromatic C-H bond activation by (PCP)Ir. Cyclometalation reactions resulting from single or double C-H activation processes yield particularly stable products. Additional results included an unexpected C-C activation, and several products stabilized by heteroatom (N, O) coordination to iridium. Activation of large polycycles like terpyridine yielded stable, κ2 chelates that may be of value in research on organic light emitting diodes (OLEDs). Finally, several congested (PCP)Ir dimers were synthesized by taking advantage of the remarkable stability of the products from cyclometalation to the (PCP)Ir complex.Ph. D.Includes bibliographical referencesIncludes vitaby David Alan Lavisk
Characella luna Dias & Santos & Pinheiro 2019, sp. nov.
No full textCharacella luna sp. nov. (Fig. 1A–I; Table 1) Holotype: UFPEPOR 2150, Bacia Potiguar (04° 44.8945' S, 36° 25.4571' W), Rio Grande do Norte State, Brazil, depth 108 m, trawl, Box 37, col. PetrobraS, (23.V.2011). Description of preserved specimen (Fig. 1A). Flattened fragment of 1–3 cm thick and 12 cm length. Surface iS irregular and Strongly hiSpid. ConSiStency compreSSable to hard. OSculeS not viSible. Colour in life iS unknown and purple in ethanol. The Specimen waS collected in the Same drag aS Aiolochroia crassa (Hyatt, 1875) and Stored in the Same container. It iS poSSible that the A. crassa pigmentS diScoloured the Characella Specimen. Skeleton: (Fig. 1B). EctoSome conSiSting of a denSe layer of microSclereS and Small orthotrianeS with no particular architecture, pierced by oxeaS and the cladome of dichotriaeneS. ChoanoSomal Skeleton with oxeaS and microSclereS forming a confuSed maSS lacking orientation. SpiculeS (Fig. 1C–I). OxeaS (Fig. 1C–D): (1) long, Smooth, Slender and Slightly curved (2433.1– 3200.5 –3866.3 / 36.6– 60.6 –93.3 µm), (2) Short, Smooth, thick and curved (161– 183.5 –209.3 / 6.4– 8.7 –9.6 µm); OrthotrianeS (Fig. 1E): Straight and Smooth (rhabdome: 138– 196 –333 / 12.5– 20.5 –50 µm; cladome 225– 347 –750 µm); DichotriaeneS (Fig. 1H): rare, Straight and Smooth (cladome 237.5– 323.1 –506.2 µm); AmphiaSterS (Fig. 1I): highly microSpined with 6–9 actineS (width 10.9– 22.7 –31.5 µm); MicroxeaS (Fig. 1F–G): (1) thin, long, entirely microSpined and Slightly curved (114.3– 197.5 –296.2 / 1.61– 4.1 –6.4 µm), (2) Straight, entirely microSpined and centrotylote (32.2– 40.5 –57.9 / 1.6– 2.3 –3.5 µm). Distribution and ecology. Known only from the type locality: Off Bacia Potiguar, Rio Grande do Norte State, Brazil), at 108 m depth. No data regarding the habitat were recorded; the relatively deep diStribution (below 100 m) iS So far unuSual for memberS of the genuS. Etymology. The Specific name honorS the Second author’S daughter Luna Maria Mariz Garcia. Discussion. ThiS new SpecieS iS aSSigned to Characella baSed on the two categorieS of microxeaS and the predominance of amphiaSterS aS microSclereS. Currently, only three SpecieS of genuS are known for the Brazilian coaSt (Table 1). The SpecieS moSt Similar to Characella luna sp. nov. iS C. capitolii, becauSe both have two categorieS of oxeaS and two categorieS of microxeaS, one of them centrotylote. However, C. capitolii differS by not having dichotriaeneS and ......continued on the next page References: (1) Van Soest & Stentoft (1988); (2) Maldonado (2002); (3) Wilson (1925); (4) Mothes et al. (2007); (5) Sollas (1888); (6) Burton (1954); (7) De Laubenfels (1934); (8) Lévi (1993); (9) Lebwohl (1914); (10) Cárdenas & Rapp (2012); (11) Van Soest et al. (2014) for having pleSiaSterS and metaSterS. Like C. capitolii, C. poecillastroides Van SoeSt et al. 2014 ShareS two categorieS of microxeaS, one of them centrotylote. NevertheleSS, C. poecillastroides differS by the abSent of dichotriaeneS and juSt one category of oxea. The following SpecieS differS from the new SpecieS by: PreSence of one category of oxea (C. abbreviata; C. agassizi; C. aspera; C. connectens; C. flexibilis; C. laevis; C. poecillastroides; C. reticulata); AbSence of dichotriaeneS (C. abbreviata; C. agassizi; C. capitolii; C. connectens; C. ijimai; C. laevis; C. poecillastroides; C. reticulata; C. tripodaria); AbSence of orthotriaeneS (C. enae; C. flexibilis); AbSence of the Second category of microxea (C. agassizi; C. enae; C. laevis; C. reticulata); PreSence of metaSterS and abSence of amphiaSterS (C. capitolii; C. enae; C. flexibilis; C. ijimai; C. laevis; C. reticulata); PreSence of pleSiaSterS (C. abbreviata; C. capitolii). In addition, C. laevis, C. ijimai and C. reticulata differ from C. luna sp. nov. by having tyloStyleS; C. pachastrelloides differS by having anatriaeneS.Published as part of Dias, Alan, Santos, George Garcia & Pinheiro, Ulisses, 2019, A new species of Characella Sollas, 1886 (Tetractinellida; Demospongiae; Porifera) from deeper waters off the coast of Brazil, pp. 196-200 in Zootaxa 4559 (1) on pages 196-200, DOI: 10.5281/zenodo.258520
Earthworm richness in no-tillage farming systems and riparian forests in Southern and Southeastern Brazil
No full textBartz, Marie L.C., Barreto, Julia, Santos, Alessandra, Dudas, Rafaela T., Ferreira, Talita, Maia, Lilianne Dos Santos, Demetrio, Wilian C., Smokanit, Manoela, Tavares, Alan A., Schuster, Phillip A., Hernani, Luis C., Brown, George G. (2023): Earthworm richness in no-tillage farming systems and riparian forests in Southern and Southeastern Brazil. Zootaxa 5255 (1): 362-376, DOI: 10.11646/zootaxa.5255.1.29, URL: http://dx.doi.org/10.11646/zootaxa.5255.1.2
Post-war British working-class fiction with special reference to the novels of John Braine, Alan Sillitoe, Stan Barstow, David Storey and Barry Hines
Get PDFThis study is about British working-class fiction in the post-war period.
It covers various authors such as Robert Tressell, George Orwell, Walter Greenwood, Lewis Grassic Gibbon and DH Lawrence from the early twentieth century; writers traditionally classified as 'Angry Young Men' like John Osborne, Arnold Wesker, Shelagh Delaney, John Wain and
Kingsley Amis; and working-class novelists like John Braine, Stan Barstow, David Storey, Alan Sillitoe and Barry Hines from the 1950s and 1960s.
Some of the main issues dealt with in the course of this study are language, form, community, self/identity/autobiography, sexuality and relationship with bourgeois art. The major argument centres on two questions: representation of working-class life, and the
relationship between working-class literary tradition and dominant ideologies.
We will be arguing that while working-class fiction succeeded in challenging and rupturing bourgeois literary tradition, on the level of language and linguistic medium of expression for example, it utterly failed to break away from dominant, bourgeois modes of literary production in relation to form, for instance.
Our argument is situated within Marxist approaches to literature, a political and aesthetic position from which we attempt an analysis and an evaluation of this working-class literary tradition. These critical approaches provide us also with the theoretical tool to define the political perspective of this tradition, and to judge whether it was confined to a descriptive mode of representation or
located in a radical, political outlook
Glossoscolex undetermined
No full textGlossoscolex sp. 73 BRSP0227, 9 individuals, surface soil under riparian forest in Itaí—SP (23°33’50.75”S; 49°04’56.88”W), December 2017. M.L.C. Bartz, H.S. Nadolny, J. Barreto, A. Santos, G.G. Brown colls.Published as part of Bartz, Marie L. C., Barreto, Julia, Santos, Alessandra, Dudas, Rafaela T., Ferreira, Talita, Maia, Lilianne Dos Santos, Demetrio, Wilian C., Smokanit, Manoela, Tavares, Alan A., Schuster, Phillip A., Hernani, Luis C. & Brown, George G., 2023, Earthworm richness in no-tillage farming systems and riparian forests in Southern and Southeastern Brazil, pp. 362-376 in Zootaxa 5255 (1) on page 367, DOI: 10.11646/zootaxa.5255.1.29, http://zenodo.org/record/774502
Ocnerodrilidae
No full textOcnerodrilidae sp.16 BRSP0235, 65 individuals, surface soil under riparian forest in Itaí—SP (23°35’16.22”S; 48°56’27.81”W), December 2017. M.L.C. Bartz, H.S. Nadolny, J. Barreto, A. Santos, G.G. Brown colls.Published as part of Bartz, Marie L. C., Barreto, Julia, Santos, Alessandra, Dudas, Rafaela T., Ferreira, Talita, Maia, Lilianne Dos Santos, Demetrio, Wilian C., Smokanit, Manoela, Tavares, Alan A., Schuster, Phillip A., Hernani, Luis C. & Brown, George G., 2023, Earthworm richness in no-tillage farming systems and riparian forests in Southern and Southeastern Brazil, pp. 362-376 in Zootaxa 5255 (1) on page 369, DOI: 10.11646/zootaxa.5255.1.29, http://zenodo.org/record/774502
Quantum steering ellipsoids and quantum obesity in critical systems
Get PDFQuantum obesity (QO) is new function used to quantify quantum correlations
beyond entanglement, which also works as a witness for entanglement. Thanks to
its analyticity for arbitrary state of bipartite systems, it represents an
advantage with respect to other quantum correlations, like quantum discord for
example. In this work we show that QO is a fundamental quantity to observe
signature of quantum phase transitions. We also describe a mechanism based on
local filtering operations able to intensify the critical behavior of the QO
near to the transition point. To this end, we introduce a theorem stating how
QO changes under local quantum operations and classical communications. This
work opens perspective for the characterization of new phenomena in quantum
critical systems through the analytically computable pairwise QO.Comment: 8 pages and 3 figures. Comments are welcom
Fimoscolex undetermined
No full textFimoscolex sp. 25 BRSP0228, 3 individuals, surface soil under riparian forest in Itaí—SP (23°33’50.75”S; 49°04’56.88”W), December 2017. M.L.C. Bartz, H.S. Nadolny, J. Barreto, A. Santos, G.G. Brown colls. BRSP0233, 3 individuals, surface soil under riparian forest in Itaí—SP (23°35’16.22”S; 48°56’27.81”W), December 2017. M.L.C. Bartz, H.S. Nadolny, J. Barreto, A. Santos, G.G. Brown colls.Published as part of Bartz, Marie L. C., Barreto, Julia, Santos, Alessandra, Dudas, Rafaela T., Ferreira, Talita, Maia, Lilianne Dos Santos, Demetrio, Wilian C., Smokanit, Manoela, Tavares, Alan A., Schuster, Phillip A., Hernani, Luis C. & Brown, George G., 2023, Earthworm richness in no-tillage farming systems and riparian forests in Southern and Southeastern Brazil, pp. 362-376 in Zootaxa 5255 (1) on page 367, DOI: 10.11646/zootaxa.5255.1.29, http://zenodo.org/record/774502
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