cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Stable bipolarons in open quantum systems
Creators: name: Moroder, Mattia
name: Grundner, Martin
name: Damanet, François
name: Schollwöck, Ulrich
name: Mardazad, Sam
name: Flannigan, Stuart
name: Köhler, Thomas
name: Paeckel, Sebastian
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Recent advances in numerical methods significantly pushed forward the understanding of electrons coupled to quantized lattice vibrations. At this stage, it becomes increasingly important to also account for the effects of physically inevitable environments. In particular, we study the transport properties of the Hubbard-Holstein Hamiltonian that models a large class of materials characterized by strong electron-phonon coupling, in contact with a dissipative environment. Even in the one-dimensional and isolated case, simulating the quantum dynamics of such a system with high accuracy is very challenging due to the infinite dimensionality of the phononic Hilbert spaces. For this reason, the effects of dissipation on the conductance properties of such systems have not been investigated systematically so far. We combine the non-Markovian hierarchy of pure states method and the Markovian quantum jumps method with the newly introduced projected purified density-matrix renormalization group, creating powerful tensor-network methods for dissipative quantum many-body systems. Investigating their numerical properties, we find a significant speedup up to a factor $\sim 30$ compared to conventional tensor-network techniques. We apply these methods to study dissipative quenches, aiming for an in-depth understanding of the formation, stability, and quasi-particle properties of bipolarons. Surprisingly, our results show that in the metallic phase dissipation localizes the bipolarons, which is reminiscent of an indirect quantum Zeno effect. However, the bipolaronic binding energy remains mainly unaffected, even in the presence of strong dissipation, exhibiting remarkable bipolaron stability. These findings shed light on the problem of designing real materials exhibiting phonon-mediated high-$T_\mathrm{C}$ superconductivity.
Dynamics of certain Euler-Bernoulli rods and rings from a minimal coupling quantum isomorphism
Creators: name: Engstrom, T. A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: In some parameter and solution regimes, a minimally coupled nonrelativistic quantum particle in 1d is isomorphic to a much heavier, vibrating, very thin Euler-Bernoulli rod in 3d, with ratio of bending modulus to linear density $(\hbar/2m)^2$. For $m=m_e$, this quantity is comparable to that of a microtubule. Axial forces and torques applied to the rod play the role of scalar and vector potentials, respectively, and rod inextensibility plays the role of normalization. We show how an uncertainty principle $ΔxΔp_x\gtrsim\hbar$ governs transverse deformations propagating down the inextensible, force and torque-free rod, and how orbital angular momentum quantized in units of $\hbar$ or $\hbar/2$ (depending on calculation method) emerges when the force and torque-free inextensible rod is formed into a ring. For torqued rings with large wavenumbers, a ``twist quantum'' appears that is somewhat analogous to the magnetic flux quantum. These and other results are obtained from a purely classical treatment of the rod, i.e., without quantizing any classical fields.
description: 7 pages, 1 table, 1 figure, accepted for publication in Phys. Rev. E
Epistemology & Semiotics, Information and Sign: An Introduction
Creators: name: Kourdis, Evangelos
name: Chatzopoulou, Katerina
Publisher: name: Syn-Thèses
Year: 2023
Subjects: epistemology, semiotics, information, sign

description: This introduction begins with the expansion of the field of semiotics and continues with the relationship between semiotics and epistemology before presenting the articles that make up this special issue of the journal Syn-Thèses. The content and transmutation of sign and its information through the conversation of the sciences has been a challenge for a number of scholars who have studied it in different research settings and through different semiotic theories, enriching our knowledge as readers and advancing one of the most important issues of our time: the conversation of the sciences and how it can help people and the advancement of science.
description: Syn-Thèses, No 14 (2023): Epistemology and Semiotics: Information and Sign
Steps towards an epistemology for cognitive semiotics
Creators: name: Sonesson, Göran
Publisher: name: Syn-Thèses
Year: 2023
Subjects: Meaning, Methods, Consciousness, Phenomenology, Cognition

description: Cognitive semiotics has been characterized as the pooling together of theories, methods, models, and findings from semiotics and cognitive science. Those who have taken up the challenge of combining these two research traditions have done so, however, in rather different ways. Nevertheless, within both traditions, and predominantly in the second one, there are those who espouse some kind of reductionism, in which meaning and consciousness are non-existent or mere epiphenomena. The present contribution argues that there can be no study of either meaning or consciousness that does not start by recognizing that these are real phenomena, and that all other methods, such as, notably, experiments, while very useful, are only limited and indirect ways of approaching meaning and consciousness. We start by pointing out that linguistics, and therefore semiotics, doesn’t fit into the classical division between Geisteswissenschaften and Naturwissenschaften, but shares properties with both. To begin the building of an epistemology for cognitive semiotics, we hark back to Vico’s notion of Verum Factum, unwittingly explicated by the semiotician Luis Prieto, as well as to the phenomenological method, as it has been defined by both Husserl and Peirce, and taken further by Gurwitsch and Merleau-Ponty.
description: Syn-Thèses, No 14 (2023): Epistemology and Semiotics: Information and Sign
Epistemology as a Transsemiotic Cartography of Human Knowledge
Creators: name: Wąsik, Zdzisław
Publisher: name: Syn-Thèses
Year: 2023
Subjects: constructivism, epistemology, existentialism, phenomenology, semiotics.

description: The following treatise departs from the assumption that epistemology is a theory of knowledge, which gives answers to selected questions about its objective and/or subjective status, firstly, how the knowledge exists, secondly, how the knowledge is acquired or learned and taught, thirdly, how the knowledge is preserved or documented, fourthly, how the knowledge is constructed and justified, and finally how the acquisition and dissemination of knowledge depends on ethical virtues and moral duties of the knowing subject. These five answers constitute five types of epistemology, respectively, in the perspectivist metascientific sense, in the solipsistic acquisitory sense, in the textualistic documentary sense, in the interrogativist argumentary sense, and in the normativist aretological sense.
description: Syn-Thèses, No 14 (2023): Epistemology and Semiotics: Information and Sign
Limitations on Transversal Computation through Quantum Homomorphic Encryption
Creators: name: Newman, Michael
name: Shi, Yaoyun
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: Cryptography and Security (cs.CR)
subject: Information Theory (cs.IT)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Transversality is a simple and effective method for implementing quantum computation fault-tolerantly. However, no quantum error-correcting code (QECC) can transversally implement a quantum universal gate set (Eastin and Knill, Phys. Rev. Lett., 102, 110502). Since reversible classical computation is often a dominating part of useful quantum computation, whether or not it can be implemented transversally is an important open problem. We show that, other than a small set of non-additive codes that we cannot rule out, no binary QECC can transversally implement a classical reversible universal gate set. In particular, no such QECC can implement the Toffoli gate transversally. We prove our result by constructing an information theoretically secure (but inefficient) quantum homomorphic encryption (ITS-QHE) scheme inspired by Ouyang et al. (arXiv:1508.00938). Homomorphic encryption allows the implementation of certain functions directly on encrypted data, i.e. homomorphically. Our scheme builds on almost any QECC, and implements that code's transversal gate set homomorphically. We observe a restriction imposed by Nayak's bound (FOCS 1999) on ITS-QHE, implying that any ITS quantum fully homomorphic scheme (ITS-QFHE) implementing the full set of classical reversible functions must be highly inefficient. While our scheme incurs exponential overhead, any such QECC implementing Toffoli transversally would still violate this lower bound through our scheme.
description: 23 pages, 2 figures, minor edits
Naturalizing Symbols?
Creators: name: Fano, Vincenzo
Publisher: name: Syn-Thèses
Year: 2023
Subjects: Symbol, naturalization, Fodor, intentionality, Biosemiotics, Semiophysics

description: The paper’s main goal is to draw attention to a reductionist strategy prompted by Jerry Fodor’s work on the problem of human intentionality, and to suggest that said strategy could profitably be adopted to provide a naturalistic explanation of Peircean symbols. In the course of doing so, we consider two interesting semiotic approaches to this phenomenon due to René Thom and to Marcello Barbieri respectively, and we try to show that they both fall short of meeting two basic epistemological desiderata. In order to exemplify the kind of alternative strategy that we have in mind, we then sketch a toy model of our ability to use words and sentences, and we argue that, in spite of its manifest current limits, it could represent a useful starting point for the much broader challenge of naturalizing symbols.
description: Syn-Thèses, No 14 (2023): Epistemology and Semiotics: Information and Sign
Γλωσσολογία και Σημειωτική: Υπόρρητη σημασία και επιθηματοποίηση
Creators: name: Anastassiadis-Syméonidis, Anna
Publisher: name: Syn-Thèses
Year: 2023
Subjects: Constructive morphology, suffixes, synonymy, experiential temporal meaning, socially stereotypical meaning

description: We examine Modern Greek suffixes -iatiko(s) and -istiko(s) which are indexes of implied meaning related to the cultural and social context of the speakers: The suffixes -iatiko(s) and -istiko(s) are applied to a base that belongs to the category of nouns. Based on the Relational Rule of Word Construction, the above suffixes construct adjectives. Adjectives constructed with -iatiko(s) attribute to the specified noun (kavgas ‘quarrel’) experiential temporal properties of the base noun (vrady ‘evening’), e.g. βραδιάτικος καβγάς ‘evening quarrel/night fight’. Adjectives constructed with -istiko(s) attribute to the specified noun (παιχνίδι ‘toy/game’) socially stereotypical properties of the base noun (αγόρι ‘boy’), e.g. αγορίστικο παιχνίδι ‘boy's toy/game’. Temporal adverbs derived from adjectives with -iatiko(s), e.g. καλοκαιριάτικα ‘in summer’, are used when the speaker’s beliefs or expectations regarding the cultural knowledge for the specific time period, are contradicted. Manner adverbs e.g. δασκαλίστικα ‘in teacher manner’ which are derived from adjectives with -istiko(s), e.g. δασκαλίστικος ‘teacherly’, inherit from the stereotypical meaning concerning social behavior. Adjectives derived from the same noun-base and different suffixes are not absolute synonyms, e.g. βραδ-ινός ‘of evening’ – βραδ-ιάτικος ‘of evening’ and the semantic and pragmatic differences between them are very difficult to understand by non-native speakers. The two suffixes -iatiko(s) and -istiko(s) belong to the [-learned] zone and are applied to nouns of the same zone, e.g. μεσημεριάτικος ‘of midday’ - *μεσημβριάτικος ‘of midday’, παπαδίστικος ‘of priest’ - *ιερίστικος ‘of priest’. The feature [±learned] is also associated with the textual genre in which the adjectives constructed with the above suffixes appear as well as the corresponding adverbs. Consequently, derived adjectives and adverbs with these suffixes are neither present on academic speech nor on scientific terminology.
description: Syn-Thèses, No 14 (2023): Epistemology and Semiotics: Information and Sign
Signaling the unreal in language evolution: locating irrealis syntactic projection in phylogenetic time
Creators: name: Chatzopoulou, Katerina
Publisher: name: Syn-Thèses
Year: 2023
Subjects: evolutionary syntax, nonveridicality, irrealis, prefrontal synthesis

description: This paper discusses the signification of the unreal in human language from an evolutionary perspective with the aid of recent research on language evolution across distinct but interrelated fields. The term ‘unreal’ is used here to refer to situations or entities that are not—yet—true or existing and in linguistic terms it relates to the notion of nonveridicality (Giannakidou 1998, Giannakidou Mari 2021), which is an analysis of the pretheoretical notion of the irrealis. From a biological perspective the role of the lateral prefrontal cortex is here highlighted regarding the signification of the unreal. In particular the function of prefrontal synthesis (PFS), defined in Vyshedskiy (2019) as the ‘conscious, purposeful process of synthesizing novel mental images from two or more objects stored in memory’.
description: Syn-Thèses, No 14 (2023): Epistemology and Semiotics: Information and Sign
Detection of malicious data in vehicular ad-hoc networks for traffic signal control applications
Creators: name: Placzek, Bartlomiej
name: Bernas, Marcin
Publisher: name: arXiv
Year: 2017
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Effective applications of vehicular ad hoc networks in traffic signal control require new methods for detection of malicious data. Injection of malicious data can result in significantly decreased performance of such applications, increased vehicle delays, fuel consumption, congestion, or even safety threats. This paper introduces a method, which combines a model of expected driver behaviour with position verification in order to detect the malicious data injected by vehicle nodes that perform Sybil attacks. Effectiveness of this approach was demonstrated in simulation experiments for a decentralized self-organizing system that controls the traffic signals at multiple intersections in an urban road network. Experimental results show that the proposed method is useful for mitigating the negative impact of malicious data on the performance of traffic signal control.
description: 11 pages, 4 figures
On four-point interactions in massless higher spin theory in flat space
Creators: name: Roiban, R.
name: Tseytlin, A. A.
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider the minimal interacting theory of a single tower of spin j=0,2,4,... massless Fronsdal fields in flat space for which consistent covariant cubic interaction vertices are known. We address the question of constraints on possible quartic interaction vertices imposed by the condition of on-shell gauge invariance of the tree-level four-point scattering amplitudes involving three spin 0 and one spin j particle. We find that these constraints admit a local solution for quartic 000j interaction term in the action only for j=2 and j=4. We determine the non-local terms in four-vertices required in the case of spin j greater than 4 and show that these non-localities can be interpreted as a result of integrating out a tower of auxiliary ghost-like massless higher spin fields in an extended theory with a local action. We also consider the conformal off-shell extension of the Einstein theory and show that its perturbative expansion is the same as of the the non-local action resulting from integrating out the trace of the graviton field from the Einstein action. Motivated by this example, we conjecture the existence of a similar conformal off-shell extension of a massless higher spin theory that may be related to the above extended theory and may have the same infinite-dimensional symmetry as the conformal higher spin theory and thus may lead to a trivial S matrix.
description: 39 pages. v2: references added; v3: few comments added, misprints corrected
Note About Integrability of Non-Relativistic String
Creators: name: Kluson, J.
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We define non-relativistic string in the background with non-trivial metric. Then we analyze its properties when we focus on integrability of this string in AdS(5)xS(5) background.
description: 19 pages
Information Content Analysis for Selection of Optimal JWST Observing Modes for Transiting Exoplanet Atmospheres
Creators: name: Batalha, Natasha E.
name: Line, Michael R.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The James Webb Space Telescope (JWST) is nearing its launch date of 2018, and will undoubtedly revolutionize our knowledge of exoplanet atmospheres. While several studies have explored what the limits of the telescope will be in terms of exoplanet characterization, less has been done to specifically identify which observing modes will be most useful for characterizing a diverse range of exoplanetary atmospheres. We use an information content based approach commonly used in the studies of Solar System atmospheres. We develop a system based upon these information content methods to trace the instrumental and atmospheric model phase space in order to identify which observing modes are best suited for particular classes of planets, focusing on transmission spectra. Specifically, the atmospheric parameter space we cover is T=600-1800 K, C/O=0.55-1, [M/H]=1-100$\times$Solar for a R=1.39 R$_J$, M=0.59 M$_J$ planet orbiting WASP-62-like star. We find that obtaining broader wavelength coverage over multiple modes is preferred over higher precision in a single mode given the same amount of observing time. Regardless of the planet temperature and composition, the best modes for constraining terminator temperatures, C/O ratios, and metalicity are NIRISS SOSS+NIRSpec G395. If the target's host star is dim enough such that the NIRSpec prism can be used, then it cam be used instead of NIRISS SOSS+NIRSpec G395. Lastly, observations that use more than two modes, should be carefully analyzed because sometimes the addition of a third mode results in no gain of information. In these cases, higher precision in the original two modes is favorable.
description: 9 figures, 1 table, accepted ApJ
Σημείο, ερμηνεία, γνώση: μια «παρανοϊκή» προσέγγιση
Creators: name: Constantinidou, Despina-Alexandra
Publisher: name: Syn-Thèses
Year: 2023
Subjects: Paranoia, semiotics, epistemology, Salvador Dali, Jacques Lacan

description: This paper places the notion of paranoia at the heart of the ongoing process of exploring the relationship between epistemology and semiotics. Tracing the historical development of the concept of paranoia from a medical to a cultural term, the paper seeks to highlight the ways in which respective considerations about the mechanism for the creation of paranoid delirium have led to an epistemological approach to the concept of reality, the interpretation of its constituent signs and, ultimately, knowledge. The interwar era is the focal point of this exploration, as reality and knowledge of it were the backbone of the surrealist movement’s challenge of the social establishment. The surrealists’ claim to expand restrictive middle-class reality is the context in which Salvador Dali employed the mechanism of paranoia in order to examine the question of interpreting reality and managing the signs that make it up. Within the same historical-cultural context, the present paper explores Jacques Lacan’s use of the same mechanism, as one that introduced him to the world of signs, with knowledge of paranoia giving way to the Lacanian “paranoid knowledge” and the subsequent adventure of the sign and ̶ above all ̶ of the signifier in his work. The contemporary use, especially in American politics and culture, of the term “paranoia” as a mechanism for interpreting signs in conspiracy theories confirms that the medical term is now ̶ almost entirely ̶ placed at the service of approaching and interpreting reality.
description: Syn-Thèses, No 14 (2023): Epistemology and Semiotics: Information and Sign
Σκέψεις για τη διεπιστημονική σημασία ενός σημειωτικού ορισμού του πολιτισμού. Η περίπτωση του Clifford Geertz
Creators: name: Dalkavoukis, Vassileios
Publisher: name: Syn-Thèses
Year: 2023
Subjects: Geertz, culture, meaning, interdisciplinarity.

description: Despite the fact that the discourse on symbols is older, the connection of symbols to signs seems to have paved the way for their more systematized approach, in the context of Semiotics. Building upon this procedure, one should include the renewal of Symbolic Anthropology’s conceptual arsenal through Clifford Geertz’s famous semiotic definition of culture. Occasioned by the introduction of cultural significance, Geertz posits a number of interdisciplinary efforts, which he documents in his work. Firstly, he converses with Biological Anthropology, in an attempt to evaluate the concept of meaning in the evolutionary course of the human species, while, in following up on those thoughts, he attempts to evaluate their application to the work of Jerome Bruner and in the correlation between cultural meaning and educational action. The application of cultural significance is extended to include “structures” much more tied to Social Anthropology, such as nationalism in “new states” emerging from the “revolution” of decolonization, and finally to converse with Claude Lévy-Strauss’ mental adventure. Finally, cultural significance is applied to one of Geertz’s probably “forgotten” conceptual efforts regarding the “bazaar economy”, in which cultural meaning is utilized in the context of studying the so-called “informal” or “human economy”.
description: Syn-Thèses, No 14 (2023): Epistemology and Semiotics: Information and Sign
Σημειωτική προσέγγιση στην εικαστική απόδοση της παράστασης της Κρίσης των ψυχών σε λαούς και θρησκείες
Creators: name: Dialektopoulos, Thanasis
Publisher: name: Syn-Thèses
Year: 2023
Subjects: Hereafter, eschatology, judgement of souls, psychostasis

description: The fate of the soul after death has always attracted man's interest. Perceptions of the Hereafter are a driving force for Life, because as Plato said: "Philosophy is the study of death" (Phaedon 63.b4-69.e2). The ancient Greeks were so concerned about the afterlife, that they created an accurate picture of death and the path that souls follow, as well as a system of reward and punishment for deeds of mortals while they lived. After souls are tried in the great court of judgment, the judges decide where the moral, virtuous and blessed souls will be placed and where the wicked and immoral will end up, according to the deeds of men when alive. The eschatological theme of the Judgment of souls enriched with elements from myths and traditions of peoples and religions has a rich visual performance. Semiologically it offers a wealth of information with references both to life and deeds of men on earth and in Hereafter.
description: Syn-Thèses, No 14 (2023): Epistemology and Semiotics: Information and Sign
Τα Κινηματογραφικά Είδη ως σημασιακές εξελικτικές δομές και δείκτες νοήματος: θεωρητικά κριτήρια προσέγγισης και καθορισμού
Creators: name: Dimitromanolaki, Eleftheria
Publisher: name: Syn-Thèses
Year: 2023
Subjects: Film Genres, semantic structures, narrativity

description: The modern era is characterized by a continuous and an evolving pluralism in terms of genres, in all forms of art. This pluralism is particularly noticeable in cinema, where - due to the technological progress - it creates new genres or leads to the evolution of sub-genres. A browse of the imdb website, reveals that every movie is categorized into more than one genre. This is also reflected in the Film Genre Theory and the Film Archives. The present approach attempts to highlight the multifaceted field of genres in fictional films, by utilizing the Semiology and Narrative Theory, both from a literary perspective, as well as from the perspective of film studies. The main objective is to point out those aspects of narrativity that interact with signs and meanings, especially those that contribute to the distinction of film genres as well as to the identification of their main features, especially those that lead to the understanding of the sub-genres. In this respect, the present approach is being focused on the Sémantique Structurale by Algirdas Greimas, in the way it can be revealingly and decisively combined with the contemporary film genre theories.
description: Syn-Thèses, No 14 (2023): Epistemology and Semiotics: Information and Sign
Κοινωνική Σημειωτική & Νεότερη Τεχνολογία: η μελέτη περίπτωσης του Διαδραστικού Ντοκιμαντέρ «Η δεύτερη ευκαιρία»
Creators: name: Boltsi, Marianna
Publisher: name: Syn-Thèses
Year: 2023
Subjects: interactive documentary, Greimas, interactive narrative, prisons, social semiotics

description: This paper focuses on the presentation of a social narrative entitled "The second chance", an interactive documentary of the series "Remarkable people" (2011 - 2019) by Menelaos Karamagiolis. The interactive documentary shows the effort of Rokas, a former prisoner in the Special Youth Detention Center of Avlona Greece, on his trajectory to claim a second chance; a chance of studies and freedom. The signifiers of the audiovisual messages are linked to the hero's ideological and psychological states and turn the documentary into a "weapon" for asserting his freedom, but at the same time they serve the purpose of projecting an important message and a micro-circumstance and social circumstance: the education in prison. After studying the interactive path of the interactor, we will move on to a brief analysis of the mainly narrative structure of the interactive documentary, following the genetic path of Greimas, as presented by Lagopoulos and Boklund-Lagopoulou (2016). Through isotopies we move from a micro-perception of communication to a macro-perception that moves outside the boundaries of the text and relates to social semiotics; The documentary follows the triptych "prison - education - opportunities" and addresses the issue of the second chance that a prisoner can have when he makes good use of the resources given to him through school.
description: Syn-Thèses, No 14 (2023): Epistemology and Semiotics: Information and Sign
Η «πρόοδος» και η «επιστήμη»: ανατέμνοντας το κυρίαρχο φαντασιακό του Δυτικού Κόσμου
Creators: name: Dritsas, Griorgos
Publisher: name: Syn-Thèses
Year: 2023
Subjects: Progress, Science, Middle Ages, Modernity, Post-modernity, Western Word

description: In this paper I will examine how the term progress becomes the basic word that describe a whole linear conception of history, which, although it starts from the eschatological origins of Christian doctrine, has as its basic foundation the perception that the course of the world's development has as its final stage and centre the Western World and the developments achieved within him (a perception which in the post-revolutionary landscape of ideas finds its 'philosophical armouring' in the work of Hegel). On this 'secular' view and the gradual de-metaphysicalisation of the post-medieval world, science was equally structured as a word and meaning, which, although in the early days as scientia it held the meaning of an 'intellectual virtue' linked to religion (religio), later separated from her, and was crucially linked to 'progress'. Through this paper, therefore, Ι will try to highlight, by carrying out a necessary genealogical retrospection based on the history of ideas and concepts: a) the early meaning and development of progress and science as concepts, and b) the later secularized reception of these two lexical signs in modernity and in the contemporary post-modern world, and in the end we will try to draw the necessary accompanying conclusions in the course of our analysis.
description: Syn-Thèses, No 14 (2023): Epistemology and Semiotics: Information and Sign
Evolution of Raman spectra in Mo$_{1-x}$W$_x$Te$_2$ alloys
Creators: name: Oliver, Sean M.
name: Beams, Ryan
name: Krylyuk, Sergiy
name: Kalish, Irina
name: Singh, Arunima K.
name: Bruma, Alina
name: Tavazza, Francesca
name: Joshi, Jaydeep
name: Stone, Iris R.
name: Stranick, Stephan J.
name: Davydov, Albert V.
name: Vora, Patrick M.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The structural polymorphism in transition metal dichalcogenides (TMDs) provides exciting opportunities for developing advanced electronics. For example, MoTe$_2$ crystallizes in the 2H semiconducting phase at ambient temperature and pressure, but transitions into the 1T$^\prime$ semimetallic phase at high temperatures. Alloying MoTe$_2$ with WTe$_2$ reduces the energy barrier between these two phases, while also allowing access to the T$_d$ Weyl semimetal phase. The MoWTe$_2$ alloy system is therefore promising for developing phase change memory technology. However, achieving this goal necessitates a detailed understanding of the phase composition in the MoTe$_2$-WTe$_2$ system. We combine polarization-resolved Raman spectroscopy with X-ray diffraction (XRD) and scanning transmission electron microscopy (STEM) to study MoWTe$_2$ alloys over the full compositional range x from 0 to 1. We identify Raman and XRD signatures characteristic of the 2H, 1T$^\prime$, and T$_d$ structural phases that agree with density-functional theory (DFT) calculations, and use them to identify phase fields in the MoTe$_2$-WTe$_2$ system, including single-phase 2H, 1T$^\prime$, and T$_d$ regions, as well as a two-phase 1T$^\prime$ + T$_d$ region. Disorder arising from compositional fluctuations in MoWTe$_2$ alloys breaks inversion and translational symmetry, leading to the activation of an infrared 1T$^\prime$-MoTe$_2$ mode and the enhancement of a double-resonance Raman process in 2H-MoWTe$_2$ alloys. Compositional fluctuations limit the phonon correlation length, which we estimate by fitting the observed asymmetric Raman lineshapes with a phonon confinement model. These observations reveal the important role of disorder in MoWTe$_2$ alloys, clarify the structural phase boundaries, and provide a foundation for future explorations of phase transitions and electronic phenomena in this system.
description: 18 pages, 5 figures, 1 table
Generalized Kähler Geometry and current algebras in $SU(2)\times U(1)$ N=2 superconformal WZW model
Creators: name: Parkhomenko, S. E.
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We examine the Generalized K$\ddot{a}$hler Geometry of quantum N=2 superconformal WZW model on $SU(2)\times U(1)$ and relate the right-moving and left-moving Kac-Moody superalgebra currents to the Generalized K$\ddot{a}$hler Geometry data of the group manifold using Hamiltonian formalism.
description: 10 pages, misprints corrections
Generating nanoscale and atomically-sharp p-n junctions in graphene via monolayer-vacancy-island engineering of Cu surface
Creators: name: Bai, Ke-Ke
name: Zhou, Jiao-Jiao
name: Wei, Yi-Cong
name: Qiao, Jia-Bin
name: Liu, Yi-Wen
name: Liu, Hai-Wen
name: Jiang, Hua
name: He, Lin
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Creation of high quality p-n junctions in graphene monolayer is vital in studying many exotic phenomena of massless Dirac fermions. However, even with the fast progress of graphene technology for more than ten years, it remains conspicuously difficult to generate nanoscale and atomically-sharp p-n junctions in graphene. Here, we employ monolayer-vacancy-island engineering of Cu surface to realize nanoscale p-n junctions with atomically-sharp boundaries in graphene monolayer. The variation of graphene-Cu separations around the edges of the Cu monolayer-vacancy-island affects the positions of the Dirac point in graphene, which consequently lead to atomically-sharp p-n junctions with the height as high as 660 meV in graphene. The generated sharp p-n junctions isolate the graphene above the Cu monolayer-vacancy-island as nanoscale graphene quantum dots (GQDs) in a continuous graphene sheet. Massless Dirac fermions are confined by the p-n junctions for a finite time to form quasi-bound states in the GQDs. By using scanning tunneling microscopy, we observe resonances of quasi-bound states in the GQDs with various sizes and directly visualize effects of geometries of the GQDs on the quantum interference patterns of the quasi-bound states, which allow us to test the quantum electron optics based on graphene in atomic scale.
description: 4 Figures in main text
Neuroimaging Feature Extraction using a Neural Network Classifier for Imaging Genetics
Creators: name: Beaulac, Cédric
name: Wu, Sidi
name: Gibson, Erin
name: Miranda, Michelle F.
name: Cao, Jiguo
name: Rocha, Leno
name: Beg, Mirza Faisal
name: Nathoo, Farouk S.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantitative Methods (q-bio.QM)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Biological sciences
subject: FOS: Computer and information sciences

description: A major issue in the association of genes to neuroimaging phenotypes is the high dimension of both genetic data and neuroimaging data. In this article, we tackle the latter problem with an eye toward developing solutions that are relevant for disease prediction. Supported by a vast literature on the predictive power of neural networks, our proposed solution uses neural networks to extract from neuroimaging data features that are relevant for predicting Alzheimer's Disease (AD) for subsequent relation to genetics. Our neuroimaging-genetic pipeline is comprised of image processing, neuroimaging feature extraction and genetic association steps. We propose a neural network classifier for extracting neuroimaging features that are related with disease and a multivariate Bayesian group sparse regression model for genetic association. We compare the predictive power of these features to expert selected features and take a closer look at the SNPs identified with the new neuroimaging features.
description: Under review
Extension of a factorization method of nonlinear second order ODE's with variable coefficients
Creators: name: Rosu, H. C.
name: Cornejo-Perez, O.
name: Perez-Maldonado, M.
name: Belinchon, J. A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The factorization of nonlinear second-order differential equations proposed by Rosu and Cornejo-Perez in 2005 is extended to equations containing quadratic and cubic forms in the first derivative. A few illustrative examples encountered in physics are provided.
description: 5 pages, no figures, 45 references
Η σημειωτική διαλεκτική του μουσικού οργάνου: λειτουργίες, πλαίσια, νοήματα
Creators: name: Κokkidou, May
name: Tsigka, Christina
Publisher: name: Syn-Thèses
Year: 2023
Subjects: musical instruments, social sign, bodily experience, functions

description: The semiotics of music investigates the relationships between the musical sounds and what these sounds mean to those who produce and employ them in specific socio-cultural contexts (Tagg, 2013). In the semantic network of a communicative musical system, we may state that the value given to a sign is a representational value relative to another sign. This results in a chain of operations and relationships between signs and users. But what exactly is the musical instrument as a musical sign? What are its uses? In the present paper, we will discuss the functions and complexity of instruments as signs in various contexts, through specific examples of musical expression. We will focus on the ways in which musical instruments acquire meaning (bodily mastery, work, tradition, conventions, etc.) and will document the reciprocal relationship between musical instruments and contexts. We will discern musical instruments not only as sound sources but also as signifiers of culture and social interaction. The field in question is unexplored, as the majority of semiotic studies have only researched the musical text or gestures in specific genres.
description: Syn-Thèses, No 14 (2023): Epistemology and Semiotics: Information and Sign
Semiotic and Translation Studies: An Epistemological Interplay
Creators: name: Kourdis, Evangelos
Publisher: name: Syn-Thèses
Year: 2023
Subjects: semiotics, translation studies, concepts, methods, interplay

description: The study probes into the epistemological confluence of semiotics and translation studies through the adoption of common conceptual tools. It begins with a reflection on the scientific character of the two research areas, semiotics, and translation, through the positions of both semioticians and translation scholars. In this context, it presents the positions of semioticians on translation and the positions of translation scholars on the usefulness of semiotics in the study of translation phenomena, as well as the research field of translation semiotics. The study argues that translation studies seek semiotic conceptual tools, different methods of analysis, and an appropriate theoretical framework since both disciplines study translation as a cultural phenomenon. The study records three major findings: first, the influence of semiotic theory is most evident in disciplines of translation studies where verbal and nonverbal semiotic systems cooperate and interact together, especially in audiovisual translation. Second, that the breadth of the field of semiotics seems to be viewed with caution by translation scholars, and third, that the subfield of translation semiotics seems to reflect more the views of semioticians into translation and less of translation scholars into semiotics.
description: Syn-Thèses, No 14 (2023): Epistemology and Semiotics: Information and Sign
Σημειωτική και μεταφυσική
Creators: name: Kourtis, Ioannis
Publisher: name: Syn-Thèses
Year: 2023
Subjects: Semiotics, Simulation, Pandemic, Metaphysics

description: In this article, I propose an alternative exploration of "truth", utilizing semiotics as a tool. My basic assumption is that the type of alienated human in its current state represents our "reality" at a deeper level, in relation to the false dichotomies of "inside-outside", "limitation-freedom", "alone-together", "illness-health" which reveal almost nothing. As false as the substance of reality or the distinction between substance and appearance is, equally false are the above dilemmas. Specifically, and based on a moderated relativism of phenomenological ontology (Sartre 2008), I argue that the "wandering" human as an ontological category existed before the outbreak of the pandemic and will continue to exist forever.
description: Syn-Thèses, No 14 (2023): Epistemology and Semiotics: Information and Sign
Simplified models of dark matter with a long-lived co-annihilation partner
Creators: name: Khoze, Valentin V.
name: Plascencia, Alexis D.
name: Sakurai, Kazuki
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We introduce a new set of simplified models to address the effects of 3-point interactions between the dark matter particle, its dark co-annihilation partner, and the Standard Model degree of freedom, which we take to be the tau lepton. The contributions from dark matter co-annihilation channels are highly relevant for a determination of the correct relic abundance. We investigate these effects as well as the discovery potential for dark matter co-annihilation partners at the LHC. A small mass splitting between the dark matter and its partner is preferred by the co-annihilation mechanism and suggests that the co-annihilation partners may be long-lived (stable or meta-stable) at collider scales. It is argued that such long-lived electrically charged particles can be looked for at the LHC in searches of anomalous charged tracks. This approach and the underlying models provide an alternative/complementarity to the mono-jet and multi-jet based dark matter searches widely used in the context of simplified models with the s-channel mediators. We consider four types of simplified models with different particle spins and coupling structures. Some of these models are manifestly gauge invariant and renormalizable, others would ultimately require a UV completion. These can be realised in terms of supersymmetric models in the neutralino-stau co-annihilation regime, as well as models with extra dimensions or composite models.
description: 23 pages, 15 figures, v2: References added, v3: Extended limits to longer lifetimes. Added appendix. Matches published version in JHEP
Δομική σημασιολογία και σχεδιασμός διαδραστικών εφαρμογών: ενημέρωση για την κατάθλιψη
Creators: name: Lazaridou, Eleni D.
Publisher: name: Syn-Thèses
Year: 2023
Subjects: interactive narrative, gamification, semiotics, social awareness, multimodality, depression

description: Narrative structures are sometimes used to make a communication process, such as a documentary or even a news report, more interesting (Ohler, 2008). The need for the systematic study of narrative structures and their interpretation led to the adoption of theories from the field of structural linguistics. A.J. Greimas proposed a model of semantic analysis of texts that studies the codes of the signified, denotative and connotative (Boklund-Lagopoulou, 1983), distinguishing the structural level of narrative discourse, namely the structural organization of the meaning of the text and the manifested text. In this case study, the Greimas’ semantic model is applied in conjunction with multimodality, with the aim of designing an interactive narrative about depression, based on the proposal of Maria-Ilia Katsaridou (2023). According to this proposal, the design of the interactive narrative starts from the level of depth and ends in the textualization. The interactive story is characterized by narrative coherence which contributes to the more effective transmission of information (Katsaridou, 2023), while the mental immersion and social awareness of the viewer is maximized due to the interaction with the gamified environment.
description: Syn-Thèses, No 14 (2023): Epistemology and Semiotics: Information and Sign
Unitarity of minimal $W$-algebras and their representations I
Creators: name: Kac, Victor G.
name: Frajria, Pierluigi Möseneder
name: Papi, Paolo
Publisher: name: arXiv
Year: 2022
Subjects: subject: Representation Theory (math.RT)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We begin a systematic study of unitary representations of minimal $W$-algebras. In particular, we classify unitary minimal $W$-algebras and make substantial progress in classification of their unitary irreducible highest weight modules. We also compute the characters of these modules.
description: Latex file, 60 pages. arXiv admin note: text overlap with arXiv:2012.14643; minor changes in the Introduction
Project Management Cloud Migration Strategy
Creators: name: Falguni Mehrotra
Publisher: name: F1000 Research Limited
Year: 2024

description: Legacy system migration to the cloud brings both great challenges and benefits, so there exist various academic research and industrial applications on legacy system migration to the cloud. By analyzing the research achievements and application status, we divide the existing migration methods into three strategies according to the cloud service models integrally. Different processes need to be considered for different migration strategies, and different tasks was involved accordingly. The similarities and differences between the migration strategies were discussed, and the challenges and future work about legacy system migration to the cloud were proposed. The aim of this paper was to provide an overall presentation for legacy system migration to the cloud and identify important challenges and future research directions.
Epistemological challenges in the production of nanotechnology images
Creators: name: Michos, Konstantinos
Publisher: name: Syn-Thèses
Year: 2023
Subjects: Scientific images, epistemology, nanotechnology, science mediation

description: It is common practice within the natural sciences to represent research results in the form of images. Photographs, diagrams, scans and other types of methodologies are employed like MRI, STM, AFM etc. According to Dondero and Fontanille, the complete sequence involved in the creation of a scientific image includes four stages: excitation, signal-response, transduction and visualization. Important qualities of scientific images include being informative and reproducible. Bontems claims that once information is extracted from these images, they enter a second “life cycle” in which their aesthetic power is used to create greater psycho-social impressions. Nanotechnology takes place on the scale of atoms and in doing so, challenges the classical laws of physics and subsequently imaging techniques. Using Dondero’s and Fontanille’s ideas as a starting point, this study will provide some insight into the epistemological perils during the creation of nanotechnology images. Excitation on the nanoscale involves quantum phenomena that diverge from classical causality relations. The blurring between probe and substrate in signal-response mechanisms requires systemic approaches instead of treating instrument and substrate as clearly distinct objects. Finally, transduction depends on mathematical modeling, with different models producing different results. And while scientists do their best to deal with some of these issues, the viewer’s preconceptions of nanoscopic images greatly affect the meaning being communicated.
description: Syn-Thèses, No 14 (2023): Epistemology and Semiotics: Information and Sign