630 research outputs found
Mind Against Matter: Isolating Consciousness in American Fiction, 1980-2010
Mind Against Matter uses cognitive literary theory to explore a set of contemporary texts that emphasize charactersâ feelings of alienation and isolation from their social and material worlds. Focusing on novels by Nicholson Baker and David Markson, short stories by David Foster Wallace, and the film The Truman Show, I consider how these texts focus on charactersâ individual, subjective experiences while deemphasizing their physical environments and social contexts. I argue that by privileging subjectivity in this way, these texts portray their characters as independent, to varying degrees, from their material and cultural surroundings. The texts isolate individual consciousness, causing their characters to live in mental worlds of their own making. While the novel, as a genre, often depicts alienation as a condition deriving from a characterâs status as a social outcast, the texts featured in this study treat it as a condition inherent to consciousness, derived from what their creators envision as an inevitable separation of mind from world. Rather than bemoan alienation as a loss of social connectedness, these texts portray it as inherent to mental life.
The chapters of this dissertation explore the particular visions of alienation that emerge in each of these texts. In a chapter on Nicholson Bakerâs The Mezzanine, I argue that Howie, the novelâs protagonist, views his mind as a machine that operates according to self-sufficient, automatic processes. My analysis of David Marksonâs final novels demonstrates that Markson portrays artistic creation as a process through which individual consciousness is isolated from society. David Foster Wallaceâs Oblivion treats alienation as a general human condition, as Wallaceâs interests in loneliness and solipsism derive, I argue, from his assumptions about the individualized nature of consciousness. Finally, in a chapter on The Truman Show, I argue that the filmâs sense of paranoia stems from its protagonistâs sense of being alone in his worldview. I thus present a corpus of works that maintain a close, limited focus on singular fictional minds, shutting out social and physical environments in order to depict the mind as a cloistered, self-enclosed entity. My analysis highlights the ways in which the philosophical underpinnings of these narratives render consciousness as an isolating force, stranding fictional characters on mental islands of their own making
Holographic U(1)_A and String Creation
We analyze the resolution of the U(1)_A problem in the Sakai-Sugimoto
holographic dual of large N_c QCD at finite temperature. It has been shown that
in the confining phase the axial symmetry is broken at order 1/N_c, in
agreement with the ideas of Witten and Veneziano. We show that in the
deconfined phase the axial symmetry remains unbroken to all orders in 1/N_c. In
this case the breaking is due to instantons which are described by spacelike
D0-branes, in agreement with 'tHooft's resolution. The holographic dual of the
symmetry breaking fermion condensate is a state of spacelike strings between
the D0-brane and the flavor D8-branes, which result from a spacelike version of
the string creation effect. In the intermediate phase of deconfinement with
broken chiral symmetry the instanton gas approximation is possibly regulated in
the IR, which would imply an eta' mass-squared of order exp(-N_c).Comment: 18 pages, 19 figures, minor change
On the relevance of large scale pulsed-laser deposition: Evidence of structural heterogeneities in ZnO thin films
Pulsed-laser deposition is known as a well-suited method for growing thin films of oxide compounds presenting a wide range of functional properties. A limitation of this method for industrial process is the very anisotropic expansion dynamics of the plasma plume, which induces difficulties to grow on large scale films with homogeneous thickness and composition. The specific aspect of the crystalline or orientation uniformity has not been investigated, despite its important role on oxide films properties. In this work, the crystalline parameters and the texture of zinc oxide films are studied as a function of position with respect to the central axis of the plasma plume. We demonstrate the existence of large non-uniformities in the films. The stoichiometry, the lattice parameter, and the distribution of crystallites orientations drastically depend on the position with respect to the plume axis, i.e., on the oblique incidence of the ablated species. The origin of these non-uniformities, in particular, the unexpected tilted orientation of the ZnO c-axis may be attributed to the combined effects of the oblique incidence and of the ratio between oxygen and zinc fluxes reaching the surface of the growing film
Elaborations on the String Dual to N=1 SQCD
In this paper we make further refinements to the duality proposed between N=1
SQCD and certain string (supergravity plus branes) backgrounds, working in the
regime of comparable large number of colors and flavors. Using the string
theory solutions, we predict different field theory observables and phenomena
like Seiberg duality, gauge coupling and its running, the behavior of Wilson
and 't Hooft loops, anomalous dimensions of the quark superfields, quartic
superpotential coupling and its running, continuous and discrete anomaly
matching. We also give evidence for the smooth interpolation between higgsed
and confining vacua. We provide several matchings between field theory and
string theory computations.Comment: 44 pages, 6 figures. References added, minor rewritings, published
versio
The Inclusionary Populist Communication Style on Facebook: The Case of Ada Colau in Barcelona
Communication is one of the core elements of populism, especially in social media. Through such digital platforms, political leaders can communicate directly with citizens and build both their discourse and their political leadership. Although the literature has so far identified the existence of a populist political communication style, the expansion of populism and its connection with social media are extending and diversifying the concept, as well as adding new repertoires. In order to analyse this, we propose a study of the communication strategy of the mayor of Barcelona, Ada Colau who, with a background of citizen activism, became mayor of the city in 2015 thanks to a political organisation situated as left populist. The methodology is based on quantitative and qualitative analysis of the content of Colauâs Facebook profile. A total of 226 posts between 2015 and 2017 are analysed. The results make it possible to identify a new specific modality within the populist style of political communication, namely the inclusionary populist type. This focuses on issues related to defense of the rights of the weakest social groups and works within a framework of social justice and solidarity with others. Likewise, the study confirms how Facebook is configured as a preferred platform for the construction of political leadership
A Nexafs Study of Nitric Oxide Layers Adsorbed from a nitrite Solution onto a Pt(111) Surface
NO molecules adsorbed on a Pt(111) surface from dipping in an acidic nitrite
solution are studied by near edge X-ray absorption fine structure spectroscopy
(NEXAFS), X-ray photoelectron spectroscopy (XPS), low energy electron
diffraction (LEED) and scanning tunnelling microscopy (STM) techniques. LEED
patterns and STM images show that no long range ordered structures are formed
after NO adsorption on a Pt(111) surface. Although the total NO coverage is
very low, spectroscopic features in N K-edge and O K-edge absorption spectra
have been singled out and related to the different species induced by this
preparation method. From these measurements it is concluded that the NO
molecule is adsorbed trough the N atom in an upright conformation. The maximum
saturation coverage is about 0.3 monolayers, and although nitric oxide is the
major component, nitrite and nitrogen species are slightly co-adsorbed on the
surface. The results obtained from this study are compared with those
previously reported in the literature for NO adsorbed on Pt(111) under UHV
conditions
Quark mass and condensate in HQCD
We extend the Sakai-Sugimoto holographic model of QCD (HQCD) by including the
scalar bi-fundamental "tachyon" field in the 8-brane-anti-8-brane probe theory.
We show that this field is responsible both for the spontaneous breaking of the
chiral symmetry, and for the generation of (current algebra) quark masses, from
the point of view of the bulk theory. As a by-product we show how this leads to
the Gell-Mann- Oakes-Renner relation for the pion mass.Comment: 23 pages, 7 figures; v2: corrected typos in eqs. (4.3), (4.4), (4.5),
(4.9) and (4.11), and corrected figures 3, 4, 5 and 6; v3: section 5.3 on the
pion mass rewritten in a clearer way, version published in JHE
Holographic duals of SQCD models in low dimensions
We obtain gravity duals to supersymmetric gauge theories in two and three
spacetime dimensions with unquenched flavor. The supergravity solutions are
generated by a set of color branes wrapping a compact cycle in a Calabi-Yau
threefold, together with another set of flavor branes extended along the
directions orthogonal to the cycle wrapped by the color branes. We construct
supergravity backgrounds which include the backreaction induced by a smeared
set of flavor branes, which act as delocalized dynamical sources of the
different supergravity fields.Comment: 42 pages, 5 figures;v2: typos correcte
Holographic QCD and Pion Mass
To realize massive pions, we study variations of the holographic model of
massless QCD using the D4/D8/anti-D8 brane configuration proposed by Sakai and
Sugimoto. We propose deformations which break the chiral symmetry explicitly
and compute the mass of the pions and vector mesons. The observed value of the
pion mass can be obtained. We also argue a chiral perturbation corresponding to
our deformation.Comment: 23pages, minor changes, references adde
N=1 SQCD-like theories with N_f massive flavors from AdS/CFT and beta functions
We study new supergravity solutions related to large-
supersymmetric gauge field theories with a large number of massive
flavors. We use a recently proposed framework based on configurations with
color D5 branes and a distribution of flavor D5 branes, governed by
a function . Although the system admits many solutions, under
plausible physical assumptions the relevant solution is uniquely determined for
each value of . In the IR region, the solution smoothly
approaches the deformed Maldacena-N\'u\~nez solution. In the UV region it
approaches a linear dilaton solution. For the gauge coupling
function computed holographically is negative definite, in the UV approaching
the NSVZ function with anomalous dimension
(approaching )), and with in
the IR. For , has a UV fixed point at strong coupling,
suggesting the existence of an IR fixed point at a lower value of the coupling.
We argue that the solutions with describe a "Seiberg dual" picture where
flips sign.Comment: 18 pages, 10 figure
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