cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Pump-probe spectroscopy of the one-dimensional extended Hubbard model at half filling
Creators: name: Sugimoto, Koudai
name: Ejima, Satoshi
Publisher: name: arXiv
Year: 2023
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: By utilizing time-dependent tensor-network algorithms in the infinite matrix-product-state representation, we theoretically investigate the pump-probe spectroscopy of the one-dimensional extended Hubbard model at half filling. Our focus lies on nonequilibrium optical conductivity and single-particle excitation spectra. In the spin-density-wave (SDW) phase, we identify an in-gap state in the nonequilibrium optical conductivity due to the formation of excitons (or doublon-holon pairs), generated by the pulse through nonlocal interactions. In the strong-coupling regime, we discern additional multiple in-gap and out-of-gap states. In the charge-density-wave (CDW) phase, we detect not only an in-gap state but also a finite Drude weight, which results from the dissolution of charge order by photoexcitation. Analyzing time-dependent single-particle excitation spectra directly in the thermodynamic limit confirms the origin of these new states in the SDW and CDW phases as the excitation of newly emerged dispersions. We illustrate that the pump-probe spectroscopy simulations in the thermodynamic limit furnish unambiguous spectral structures that allow for direct comparison with experimental results, and the integration of nonequilibrium optical conductivity and time- and angle-resolved photoemission spectroscopy provides comprehensive insights into nonequilibrium states.
description: 12 pages, 8 figures
Effect of Spherical Polarization on the Magnetic Spectrum of the Solar Wind
Creators: name: Dunn, Corina
name: Bowen, Trevor
name: Mallet, Alfred
name: Badman, Samuel
name: Bale, Stuart
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Plasma Physics (physics.plasm-ph)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: Magnetic fluctuations in the solar wind are often observed to maintain constant magnitude of the magnetic field in a manner consistent with spherically-polarized large-amplitude Alfvén waves. We investigate the effect of spherical polarization on the magnetic spectral index through a statistical survey of magnetic fluctuations observed by Parker Solar Probe between 20$R_\odot$ and 200$R_\odot$. We find that deviations from spherical polarization, i.e., changes in $|\mathbf{B}|$ (compressive fluctuations) and one-dimensional discontinuities, have a dramatic effect on the scaling behavior of the turbulent fluctuations. We show that shallow $k^{-3/2}$ spectra are only observed for constant magnetic field strength, three-dimensional structures, which we identify as large amplitude Alfvén waves. The presence of compressive fluctuations coincides with a steepening of the spectrum up to $k^{-5/3}$. Steeper power law scalings approaching $k^{-2}$ are observed when the fluctuations are dominated by discontinuities. Near-sun fluctuations are found to be the most spherically polarized, suggesting that this spherical state is fundamental to the generation of the solar wind. With increasing distance from the Sun, fluctuations are found to become less three dimensional and more compressive, which may indicate the breakdown of the Alfvénic equilibrium state.
description: 10 pages, 5 figures. Submitted to The Astrophysical Journal
Visual Privacy: Current and Emerging Regulations Around Unconsented Video Analytics in Retail
Creators: name: Pletcher, Scott
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Business
subject: Marketing
subject: FOS: Economics and business
subject: Strategic Management Policy
subject: Technology and Innovation
subject: Business Law, Public Responsibility, and Ethics Business
subject: Privacy Law
subject: Law
subject: FOS: Law
subject: computer vision
subject: machine learning
subject: privacy laws
subject: retail
subject: video analytics

description: Exploring the current and emerging legal landscape around using computer vision systems to infer individual attributes of retail shoppers without explicit consent.
New method for determining the light travel time in static, spherically symmetric spacetimes. Calculation of the terms of order $G^3$
Creators: name: Linet, Bernard
name: Teyssandier, Pierre
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A new iterative method for calculating the travel time of a photon as a function of the spatial positions of the emitter and the receiver in the field of a static, spherically symmetric body is presented. The components of the metric are assumed to be expressible in power series in $m/r$, with $m$ being half the Schwarzschild radius of the central body and $r$ a radial coordinate. The procedure exclusively works for a light ray which may be described as a perturbation in powers of $G$ of a Minkowskian null geodesic, with $G$ being the Newtonian gravitational constant. It is shown that the expansion of the travel time of a photon along such a ray only involves elementary integrals whatever the order of approximation. An expansion of the impact parameter in power series of $G$ is also obtained. The method is applied to explicitly calculate the perturbation expansions of the light travel time and the impact parameter up to the third order. The full expressions yielding the terms of order $G^3$ are new. The expression of the travel time confirms the existence of a third-order enhanced term when the emitter and the receiver are in conjunction relative to the central body. This term is shown to be necessary for determining the post-Newtonian parameter $γ$ at a level of accuracy of $10^{-8}$ with light rays grazing the Sun.
description: 24 pages; Eq. (114) corrected; published in Classical and Quantum Gravity with a Corrigendum
Fluxon readout of a superconducting qubit
Creators: name: Fedorov, Kirill G.
name: Shcherbakova, Anastasia V.
name: Wolf, Michael J.
name: Beckmann, Detlef
name: Ustinov, Alexey V.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Quantum computing using superconducting circuits underwent rapid development in the last decade. This field has propelled from quantum manipulation of single two-level systems to complex designs employing multiple coupled qubits allowing one to execute simple quantum algorithms. On the way to a practical quantum computer, a need for scalable interfaces between classical circuits and the quantum counterparts has arisen. Low-temperature superconducting single-flux quantum (SFQ) logic employs magnetic fluxons in Josephson transmission lines (JTLs) as basic bits for classical computation. Here, we report on an experiment implementing a direct link between SFQ electronics and a superconducting qubit. We demonstrate a readout of the state of a flux qubit through a frequency shift of a single fluxon oscillating in a JTL. The energy spectrum of the flux qubit is measured using this technique. The demonstrated approach may open ways to future full-scale integration of solid-state quantum computers with digital SFQ electronics.
title: Laser speckle imaging for non-destructive analysis
title: Απεικόνιση συμβολοκηλίδων λέιζερ για μη καταστρεπτική ανάλυση
Creators: name: Καλομοιρης Φιλιππος
Publisher: name: Technical University of Crete
Year: 2018

description: When coherent light illuminates a diffuse object, it produces a random interference effect known as a speckle pattern. If there is movement in the object either by itself (blood flow) or by a stimulation (acoustic, thermal, impact) then the speckles fluctuate in intensity. These fluctuations can provide information about the movement. Laser Speckle Imaging is a non-destructive, non-contact, full-field technology that can access these information and build a movement map of the object. This technique has in recent times become a powerful tool for scientiﬁc and industrial analysis in many different fields. Its applications range from non-contact surface analysis and archeology to biomedical science. The work that is presented in this thesis is the design of a Laser Speckle Imaging device that will be able to do non-contact analysis in impact and acoustic stimulated surfaces and make spatial and temporal movement mapping with pseudocolors. The implementation employs a sensitive camera, a coherent light source, a light expander, a stimulator and the surface we want to analyze. The light source with the expander illuminates the surface and speckle pattern is produced. This pattern is changed by the stimulator and measurements have been recorded with the camera before and during the stimulation. Measurements can be analyzed in two ways. Either analysing the temporal contrast of some images in the same state or by analysing the spatial contrast of one image. Temporal contrast analysis calculates a speckle contrast image by computing the contrast for each pixel across a sequence of images developed. Spatial contrast analysis implements a square structuring element of pixels to calculate the local speckle contrast. The Laser Speckle Imaging with spatial contrast analysis  offers high temporal resolution at the expense of spatial resolution which is offered by the temporal contrast analysis. Our implemantation can do both analyzes in order to achieve both spatial and tempooral resolution. It also quantifies the stimulation's intensity with no inforamtion about the stimulator. These features make our approach suitable in demanding laser speckle imaging applications, such as non-destructive analysis and noninvasive diagnosis.
In-between self-similarity
Creators: name: Whillock, Ian
name: 0000-0002-5134-6971
Publisher: name: The University of Texas at Austin
Year: 2022
Subjects: Electroacoustic
Experimental
Fractals
Percussion

description: Self-similarity is the phenomenon when any fragment of an object is similar to the whole of the object, such as in a fractal. Ideas of self-similarity have been expressed in music many times in canons, fugues, and other processes. These are examples of exploring self-similarity through musical structure and form. In this piece, I was interested in exploring the self-similarity of sound itself: putting interesting sounds through recursive processes to yield entirely new and distinct sounds. Expressing self-similarity through form was not my primary concern. Instead, I used these transformations to generate a pallet of sounds. Then, I simply organized these sounds in a way that was intuitive and musically exciting. Due to the complex nature of these processes, I chose simple objects as a starting point. Mixing bowls, pieces of wood, and glass cups serve as the primary sound sources. These sounds were recorded and manipulated with these processes to form the electronic soundscape. The resulting sounds are then imitated and re-interpreted by the performers, often on the very same instruments or objects. During my experimentation, I found the most interesting aspect of these transformations was somewhere in-between the distinct sounds. The piece lives here, in the unstable, unpredictable, and chaotic nature of the in-between space.
title: Επισκόπηση της λειτουργίας και της διαχείρισης μικροδικτύου μέσης τάσης με αποθήκη ενέργειας
title: A survey of the operation and management of medium voltage microgrid with energy storage
Creators: name: Κουλουκυθας Οδυσσεας
Publisher: name: Technical University of Crete
Year: 2017

description: Οι προσπάθειες για την μείωση της χρήσης των πηγών ορυκτών καυσίμων και την αντικατάσταση τους από Ανανεώσιμες Πηγές Ενέργειας (ΑΠΕ) συγκεντρώνονται στην μείωση των εκπομπών από την παραγωγή,  μεταφορά και κατανάλωση ενέργειας. Τα τελευταία χρόνια έχουν χαραχθεί πολιτικές που αφορούν τη δημιουργία θεσμικού και χρηματοοικονομικού πλαισίου για την στήριξη της ένταξης των ΑΠΕ στους τομείς της ηλεκτροπαραγωγής, της θέρμανσης και των μεταφορών. Η Ελλάδα διαθέτει πλούσιο δυναμικό σε ΑΠΕ. Η αιολική ενέργεια πρωταγωνιστεί στην ανάπτυξη των ΑΠΕ και παρουσιάζει σημαντικές επενδυτικές δυνατότητες στην Ελλάδα. Η Ελλάδα παρουσιάζει επίσης ένα ιδιαίτερα υψηλό ηλιακό δυναμικό, περίπου 1.400-1.800 (kWh/(m2.yr)) ετησίως σε οριζόντιο επίπεδο, ανάλογα το γεωγραφικό πλάτος και το ανάγλυφο της περιοχής. Στην παρούσα εργασία θα παρουσιαστούν αναλυτικά οι τεχνολογίες των συστημάτων ΑΠΕ και συγκεκριμένα, των Φωτοβολταϊκών τεχνολογιών, των υδροηλεκτρικών έργων και των συστημάτων αποθήκευσης ενέργειας, με στόχο να διερευνηθεί η δυνατότητα ηλεκτροδότησης φορτίων μέσω φωτοβολταϊκών και υδροηλεκτρικών σταθμών με σύστημα αποθήκευσης μπαταριών, όπου υλοποιείται έλεγχος συχνότητας.
description: Efforts to reduce the use of fossil fuel sources and replace them with Renewable Energy Sources (RES) combine emission reductions from energy production, transport and consumption. In recent years, policies have been devised to create an institutional and financial framework to support the integration of RES in the fields of power generation, heating and transport. Greece has a rich potential in RES. Wind energy is a leading factor in the development of RES and presents significant investment opportunities in Greece. Greece also has a particularly high potential of solar capacity of approximately 1,400-1,800 (kWh / (m2.yr)) per year on a horizontal level depending on the latitude of the area. In this thesis, the technologies of RES systems, especially Photovoltaic technologies, hydroelectric projects and energy storage systems, will be presented in order to investigate the possibility of electrification of loads through photovoltaic and hydroelectric stations with a storage battery system where frequency control is performed.
Introducing Question and Instrument Structures
Creators: name: DDI Training Group
Publisher: name: Zenodo
Year: 2021
Subjects: ddi
metadata
documentation standard
ddi lifecycle
questionnaire

description: Presents the way DDI Lifecycle organizes questions into questionnaires (“instruments”) and how flow logic can be described. Includes a presentation of which parts of a question are reusable, and the different types of representation questions can have. There is some duplication with the “Questions” deck, but this is a more detailed presentation.
An Imprint of Molecular Cloud Magnetization in the Morphology of the Dust Polarized Emission
Creators: name: Soler, J. D.
name: Hennebelle, P.
name: Martin, P. G.
name: Miville-Deschênes, M. A.
name: Netterfield, C. B.
name: Fissel, L. M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We describe a morphological imprint of magnetization found when considering the relative orientation of the magnetic field direction with respect to the density structures in simulated turbulent molecular clouds. This imprint was found using the Histogram of Relative Orientations (HRO): a new technique that utilizes the gradient to characterize the directionality of density and column density structures on multiple scales. We present results of the HRO analysis in three models of molecular clouds in which the initial magnetic field strength is varied, but an identical initial turbulent velocity field is introduced, which subsequently decays. The HRO analysis was applied to the simulated data cubes and mock-observations of the simulations produced by integrating the data cube along particular lines of sight. In the 3D analysis we describe the relative orientation of the magnetic field $\mathbf{B}$ with respect to the density structures, showing that: 1.The magnetic field shows a preferential orientation parallel to most of the density structures in the three simulated cubes. 2.The relative orientation changes from parallel to perpendicular in regions with density over a critical density $n_{T}$ in the highest magnetization case. 3.The change of relative orientation is largest for the highest magnetization and decreases in lower magnetization cases. This change in the relative orientation is also present in the projected maps. In conjunction with simulations HROs can be used to establish a link between the observed morphology in polarization maps and the physics included in simulations of molecular clouds.
description: (16 pages, 11 figures, submitted to ApJ 05MAR2013, accepted 07JUL2013)
title: Synchronization, channel estimation and detection of RFID signals with Miller coding
title: Συγχρονισμός, εκτίμηση καναλιού και ανίχνευση σημάτων RFID με κωδικοποίηση Miller
Creators: name: Στρατηγη Ειρηνη
Publisher: name: Technical University of Crete
Year: 2018

description: This work studies all necessary signal processing steps in a full-duplex Gen2 reader for RFID
tags with Miller-2, 4 and 8 line coding. Relevant prior art focused on FM0 line coding. Synchronization, channel estimation and coherent detection techniques are presented. Symbol-by-symbol detection is studied and respective BER in AWGN is theoretically calculated, showing its equivalence with BER-optimal FM0 coherent detection. Since Miller line coding has memory, maximum likelihood coherent sequence detection is studied, using the Viterbi algorithm. Simulations in Rayleigh fading show that 16-bit sequence detection offers approximately only 1.2 dB advantage compared to symbol-by-symbol at 2/1000 BER. Furthermore, higher lengths offer rather diminishing returns. This finding corroborates famous M. Simon's and D. Divsalar's relevant 2006 conjecture, stating that Miller's sequence detection with "Viterbi would not asymptotically recover a 3 dB advantage". Future work will study other fading channels, including Rice.
Biomembrane-based Memcapacitive Reservoir Computing System for Energy Efficient Temporal Data Processing
Creators: name: Hossain, Md Razuan
name: Mohamed, Ahmed Salah
name: Armendarez, Nicholas Xavier
name: Najem, Joseph S.
name: Hasan, Md Sakib
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Emerging Technologies (cs.ET)
subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences

description: Reservoir computing is a highly efficient machine learning framework for processing temporal data by extracting features from the input signal and mapping them into higher dimensional spaces. Physical reservoir layers have been realized using spintronic oscillators, atomic switch networks, silicon photonic modules, ferroelectric transistors, and volatile memristors. However, these devices are intrinsically energy-dissipative due to their resistive nature, which leads to increased power consumption. Therefore, capacitive memory devices can provide a more energy-efficient approach. Here, we leverage volatile biomembrane-based memcapacitors that closely mimic certain short-term synaptic plasticity functions as reservoirs to solve classification tasks and analyze time-series data in simulation and experimentally. Our system achieves a 99.6% accuracy rate for spoken digit classification and a normalized mean square error of 7.81*10^{-4} in a second-order non-linear regression task. Furthermore, to showcase the device's real-time temporal data processing capability, we achieve 100% accuracy for a real-time epilepsy detection problem from an inputted electroencephalography (EEG) signal. Most importantly, we demonstrate that each memcapacitor consumes an average of 41.5 fJ of energy per spike, regardless of the selected input voltage pulse width, while maintaining an average power of 415 fW for a pulse width of 100 ms. These values are orders of magnitude lower than those achieved by state-of-the-art memristors used as reservoirs. Lastly, we believe the biocompatible, soft nature of our memcapacitor makes it highly suitable for computing and signal-processing applications in biological environments.
description: Supplementary information is attached under the main text
Small World Picture of Worldwide Seismic Events
Creators: name: Ferreira, Douglas S. R.
name: Papa, Andrés
name: Menezes, Ronaldo
Publisher: name: arXiv
Year: 2013
Subjects: subject: Geophysics (physics.geo-ph)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: The understanding of long-distance relations between seismic activities has for long been of interest to seismologists and geologists. In this paper we have used data from the world-wide earthquake catalog for the period between 1972 and 2011 to generate a network of sites around the world for earthquakes with magnitude m $\geq$ 4.5 in the Richter scale. After the network construction, we have analyzed the results under two viewpoints. Firstly, in contrast to previous works, which have considered just small areas, we showed that the best fitting for networks of seismic events is not a pure power law, but a power law with exponential cutoff; we also have found that the global network presents small-world properties. Secondly, we have found that the time intervals between successive earthquakes have a cumulative probability distribution well fitted by nontraditional functional forms. The implications of our results are significant because they seem to indicate that seisms around the world are not independent. In this paper we provide evidence to support this argument.
Narratives of Earliest Hindu–Muslim Encounters
Creators: name: Ahmed Asif, Manan
Publisher: name: Columbia University
Year: 2020
Subjects: Islam
Hinduism
National interest
Crime
Punishment
Gender identity--Social aspects
History

description: This chapter makes two broad claims. The first is to incorporate a longer history of state­ craft in north India into our examination of Mughal regime. The second is to take me­ dieval Indian Ocean texts as critical source material for understanding forms of state- making, negotiation of difference, and encounters between social actors. Toward these claims, the chapter reads a set of ninth- and tenth-century narratives linking Sindh and Gujarat to Aden and Cairo. Within these texts are representations of various forms of en­ counters between those understood as Arabs and Muslims and those labeled Hindi or Sindhi. The chapter explicates accounts of embeddedness of Islam in India, of crime and punishment as modes of statecraft, of everyday gendered lives, and of networks of ex­ change in order to provide a longer history of understanding pivotal concerns of the Mughal regime in the sixteenth century.
title: Polar-code construction and decoding techniques
title: Τεχνικές κατασκευής και αποκωδικοποίησης πολικών κωδίκων
Creators: name: Αμιριδη Μαγδα
Publisher: name: Technical University of Crete
Year: 2018

description: Polar codes, recently invented by Arikan, are the first provably capacity achieving codes for any binary input symmetric discrete memoryless channel
with low encoding and decoding complexity. This thesis explores the practical
implementation of polar codes which are complexity efficient and perform
well for binary erasure channel (BEC) and binary symmetric channel (BSC).
The explicit code construction is based on a characteristic called channel polarization which involves generating N extremal (perfect or completely noisy)
channels from N independent uses of the same base channel. Information
bits are sent over the noiseless channels while pilot bits, called frozen bits,
are assigned to the noisy ones. Code design for BEC is based on the recursive
relations presented in the original paper whereas for BSC we propose a
heuristic and efficient algorithm and compare it to the method of recursive
estimation of Bhattacharyya parameters of bit-channels. The encoding is implemented using a recursive butterfly structure with O(N logN) complexity,
where N is the block length of the code. Two main low complexity decoders
are compared in terms of bit error rate: successive cancellation decoder proposed by Arikan having complexity O(N logN) with susceptibility to error
propagation and mediocre bit error rate performance at small or moderate
code lengths and list decoder, proposed by Tal and Vardy, with complexity
O(LN logN) where L is the list size.
Absence of cross-sublattice spin pumping and spin-transfer torques in collinear antiferromagnets
Creators: name: Tang, Junyu
name: Cheng, Ran
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We resolve the debate over the existence and magnitude of cross-sublattice (CS) contributions to spin pumping and spin-transfer torques in a two-sublattice antiferromagnet connected to a non-magnetic metal. Guided by symmetry considerations, we first relate the controversial CS terms to specific components in the spin conductance matrix. Then we quantify these components by studying the spin-dependent electron scattering on a fully compensated interface. We ascertain the absence of all CS contributions in the collinear regime. Even in the non-collinear regime, the CS contributions only constitute a higher-order correction to the existing theory.
description: 5 pages, 2 figures
The Welfare Implications of Massive Money Injection: The Japanese Experience from 2013 to 2020
Creators: name: Watanabe, Tsutomu
Publisher: name: Columbia University
Year: 2020
Subjects: Monetary policy
Demand for money
Demand for money--Econometric models
Deflation (Finance)

description: This paper derives a money demand function that explicitly takes the costs of storing money into account. This function is then used to examine the consequences of the large-scale money injection conducted by the Bank of Japan since April 2013. The main findings are as follows. First, the opportunity cost of holding money calculated using 1-year government bond yields has been negative since the fourth quarter of 2014, and most recently (2020:Q2) was -0.2%. Second, the marginal cost of storing money, which was 0.3% in the most recent quarter, exceeds the marginal utility of money, which was 0.1%. Third, the optimum quantity of money, measured by the ratio of M1 to nominal GDP, is 1.2. In contrast, the actual money-income ratio in the most recent quarter was 1.8. The welfare loss relative to the maximum welfare obtained under the optimum quantity of money in the most recent quarter was 0.2% of nominal GDP. The findings imply that the Bank of Japan needs to reduce M1 by more than 30%, for example through measures that impose a penalty on holding money.
Extended hadron and two-hadron operators of definite momentum for spectrum calculations in lattice QCD
Creators: name: Morningstar, C.
name: Bulava, J.
name: Fahy, B.
name: Foley, J.
name: Jhang, Y. C.
name: Juge, K. J.
name: Lenkner, D.
name: Wong, C. H.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: Multi-hadron operators are crucial for reliably extracting the masses of excited states lying above multi-hadron thresholds in lattice QCD Monte Carlo calculations. The construction of multi-hadron operators with significant coupling to the lowest-lying multi-hadron states of interest involves combining single hadron operators of various momenta. The design and implementation of large sets of spatially-extended single-hadron operators of definite momentum and their combinations into two-hadron operators are described. The single hadron operators are all assemblages of gauge-covariantly-displaced, smeared quark fields. Group-theoretical projections onto the irreducible representations of the symmetry group of a cubic spatial lattice are used in all isospin channels. Tests of these operators on 24^3 x 128 and 32^3 x 256 anisotropic lattices using a stochastic method of treating the low-lying modes of quark propagation which exploits Laplacian Heaviside quark-field smearing are presented. The method provides reliable estimates of all needed correlations, even those that are particularly difficult to compute, such as eta eta -> eta eta in the scalar channel, which involves the subtraction of a large vacuum expectation value. A new glueball operator is introduced, and the evaluation of the mixing of this glueball operator with a quark-antiquark operator, pi-pi, and eta-eta operators is shown to be feasible.
description: 20 pages, 7 figures, 21 tables (final version accepted for publication in Physical Review D)
Investigation on Cyanolipid in Sapindaceous Seed Oils
Creators: name: Kumar, Dinesh
name: S. Q. Hasan
Publisher: name: Zenodo
Year: 2021
Subjects: Cyanolipids
Sapindaceae
S. obavatus
TLC

description: The content of cyanolipids in a variety of sapindaceous seed oils has been investigated. This new class of lipids is included in 37 percent of all oils except one.Long-chain fatty acids are hydroxylated with an unsaturated isoprenoid hydroxyl or with dihydroxynitrile in these cyanolipids, which come in four different forms. Though such acids are preferentially incorporated in nitrile-containing fractions, the large amount of C20-carbon fatty acids commonly contained in the oil suggests significant cyanolipid content. The cyanolipid component's fatty acid composition was also compared to that of triglycerides. S. obavatus seed oil was shown to contain a diester having two fatty acid moieties esterified with 1-cyano-2-hydroxymethylprop-1-ene-3-ol. Analysis of the NMR spectra has been used as a method for the measurement of the type and amount of cyanolipids in seed oils.
Accounting for Intangible Assets: Suggested Solutions
Creators: name: Barker, Richard
name: Lennard, Andrew
name: Penman, Stephen H.
name: Teixeira, Alan
Publisher: name: Columbia University
Year: 2020
Subjects: Accounting
Intangible property
Uncertainty--Economic aspects

description: Current accounting practice expenses many investments in intangible assets to the income statement, confusing earnings from current revenues with investments to gain future revenues. This has led to increasing calls to book those investments to the balance sheet. Drawing on the relevant research, this paper proposes solutions for the accounting for intangible assets that contrast with balance sheet recognition, and compares them to current practice and the IFRS standards that dictate practice. Key is the recognition that an accounting solution comes from a double-entry system which produces an income statement as well as a balance sheet, and that has features that both enable and limit the information that can be conveyed about the value in intangible assets. In this system, asset recognition in the balance sheet must consider the effect on measurement in the income statement, for the income statement conveys value added to investment on the balance sheet. A determining feature is uncertainty about investment outcome and how that affects the income statement, so our solutions center on accounting under uncertainty. Two other accounting features are added: There has to be an investment expenditure for balance sheet recognition and that expenditure must be separately identifiable from transactions. These features rather than the tangible-intangible asset dichotomy lead to the prescribed solutions.
title: Interactive dynamic time lapse video for immersive and personalized tourism applications
title: Αλληλεπιδραστικό δυναμικό time lapse βίντεο για εμβυθιζόμενες και προσωποποιημένες τουριστικές εφαρμογές
Creators: name: Γερωνυμακης Θεοδωρος
Publisher: name: Technical University of Crete
Year: 2018

description: We present a system that can be used to generate web based interactive dynamic and personalized video based navigation through a city or geographic area. The dynamic video presentations are generated from a database of panoramic images for the area, and/or from StreetView panoramic images. User preferences and interactions can change what and how it is presented during the navigation and they give a sense of personalization but also freedom of navigation, flexibility and immersion to the final user.
description: Παρουσίαζουμε ένα σύστημα το οποίο μπορεί να χρησιμοποιηθεί για τη δημιουργία αλληλεπιδραστικών, δυναμικών και προσωποποιημένων βίντεο πλοηγήσεων, με βάση το διαδίκτυο, σε μία πόλη ή γεωγραφική περιοχή. Οι δυναμικές παρουσιάσεις βίντεο κατασκευάζονται από μια βάση δεδομένων πανοραμικών εικόνων για την περιοχή ή / και από πανοραμικές εικόνες που ανακτώνται από το StreetView Service. Οι προτιμήσεις και οι αλληλεπιδράσεις των χρηστών μπορούν να αλλάξουν ποιά αντικείμενα και πώς παρουσιάζονται κατά τη διάρκεια της πλοήγησης και δίνουν μια αίσθηση εξατομίκευσης, αλλά και ελευθερία πλοήγησης, ευελιξίας και εμβύθισης στον τελικό χρήστη.
Relativistic distribution function for particles with spin at local thermodynamical equilibrium
Creators: name: Becattini, F.
name: Chandra, V.
name: Del Zanna, L.
name: Grossi, E.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Nuclear Theory (nucl-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present an extension of relativistic single-particle distribution function for weakly interacting particles at local thermodynamical equilibrium including spin degrees of freedom, for massive spin 1/2 particles. We infer, on the basis of the global equilibrium case, that at local thermodynamical equilibrium particles acquire a net polarization proportional to the vorticity of the inverse temperature four-vector field. The obtained formula for polarization also implies that a steady gradient of temperature entails a polarization orthogonal to particle momentum. The single-particle distribution function in momentum space extends the so-called Cooper-Frye formula to particles with spin 1/2 and allows to predict their polarization in relativistic heavy ion collisions at the freeze-out.
description: 15 pages. Final version to appear in Annals of Physics
Tabulated equation of state for supernova matter including full nuclear ensemble
Creators: name: Buyukcizmeci, N.
name: Botvina, A. S.
name: Mishustin, I. N.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Nuclear Theory (nucl-th)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: This is an introduction to the tabulated data base of stellar matter properties calculated within the framework of the Statistical Model for Supernova Matter (SMSM). The tables present thermodynamical characteristics and nuclear abundances for 31 values of baryon density (10$^{-8}
description: 10 pages, 8 figures, submitted to Astr.Phys. Jour. (2013)
Hiland Hall's "Report on Incendiary Publications": A Forgotten Nineteenth Century Defense of the Constitutional Guarantee of the Freedom of the Press
Creators: name: John, Richard R.
Publisher: name: Columbia University
Year: 1997
Subjects: History
Abolitionists
Postal service

description: On 25 March 1836, Vermont Congressman Hiland Hall presented to Congress a remarkable report. Hall was troubled by a number of bills that had come before the House Committee on the Post Office and Post Roads to restrict the transmission of abolitionist publications in the mail, and as a member of this committee felt it incumbent to make his objections known. Hall's report detailed his reservations to the proposed bills and closed with a ringing defense of the constitutional guarantee of a free press. Hall hoped his report would widen the terms of debate. Prior to March 25, no prominent public figure had openly questioned the authority of Congress to pass some kind of restrictive legislation. Hall's report challenged the constitutionality of any limitation on the freedom of the press, rebutting, point by point, the various rationales for these restrictions that had been advanced by President Andrew Jackson, Postmaster General Amos Kendall, and South Carolina Senator John C. Calhoun.
Hydrodynamic Supercontinuum
Creators: name: Chabchoub, A.
name: Hoffmann, N.
name: Onorato, M.
name: Genty, G.
name: Dudley, J. M.
name: Akhmediev, N.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We demonstrate experimentally multi-bound-soliton solutions of the Nonlinear Schrödinger equation (NLS) in the context of surface gravity waves. In particular, the Satsuma-Yajima N-soliton solution with N=2,3,4 is investigated in detail. Such solutions, also known as breathers on zero background, lead to periodic self-focussing in the wave group dynamics, and the consequent generation of a steep localized carrier wave underneath the group envelope. Our experimental results are compared with predictions from the NLS for low steepness initial conditions where wave-breaking does not occur, with very good agreement. We also show the first detailed experimental study of irreversible massive spectral broadening of the water wave spectrum, which we refer to by analogy with optics as the first controlled observation of hydrodynamic supercontinuum a process which is shown to be associated with the fission of the initial multi-soliton bound state into individual fundamental solitons similar to what has been observe in optics.
title: Space-time shadows of cinematography. The space-time continuum and its relation with the subject in reference in the perspective of cinematography

title: Χώρο-χρονικές σκιές ενός φιλμικού σύμπαντος. Το χώρο-χρονικό συνεχές και η σχέση του με το υποκείμενο υπό το πρίσμα του κινηματογράφου
Creators: name: Κωνιου Μαρινα
Publisher: name: Technical University of Crete
Year: 2019

description: Η παρούσα διπλωματική εργασία με σημείο εκκίνησης την θεωρία της σχετικότητας πραγματεύεται το χώρο-χρονικό συνεχές και την σχέση του με το υποκείμενο. Ο χρόνος επομένως εξετάζεται ως μια επιπλέον διάσταση που ενσωματώνεται δυναμικά στην αντίληψη του υποκειμένου για τον χώρο ο οποίος πλέον δεν είναι στατικός αλλά μεταβλητός. Βασικό εργαλείο έρευνας και επεξεργασίας αποτελεί ο κινηματογράφος καθώς παρέχει τη δυνατότητα διαχείρισης του χώρο-χρόνου και βρίσκεται σε συνεχή τριβή με το υποκείμενο, δηλαδή τον θεατή.

description: Beginning with Einstein’s theory of relativity, this master thesis deals with the space-time continuum and its relation with the subject in reference. Time is therefore considered as an additional 4th dimension that is embodied into one’s perception of space. As a result space is no longer static but dynamic and constantly changing. Cinematography was used as the basic research and experimentation tool as it provides unlimited spatio-temporal examples and also deals with the subject in reference, that is, the viewer.
title: Αποκατάσταση και αποθεραπεία. Θεραπευτήριο στους πρόποδες της Πάρνηθας Αττικής

title: Restoration and rehabilitation. Therapist center at the foot of Parnitha, Attica
Creators: name: Σταθης Θεοφανης
Publisher: name: Technical University of Crete
Year: 2019

description: Η διπλωματική προσανατολίζεται στο Ολυμπιακό χωριό Αχαρνών στους πρόποδες της Πάρνηθας.  Το Ολυμπιακό χωριό παραδοσιακά εδράζεται στις περιοχές με τις ευνοϊκότερες κλιματολογικές συνθήκες της Πρωτεύουσας του.
Σκοπός της παρούσας διπλωματικής εργασίας είναι η συμπλήρωση στον τομέα αποθεραπείας και επανένταξη στον κοινωνικό ιστό σε όσους το έχουν ανάγκη. Ένα συμπλήρωμα σε έναν τομέα ο οποίος στην Ελλάδα, αλλά ίσως και γενικότερα, στην Ευρώπη είναι σχετικά παραμελημένος, καθώς η πλειονότητα των αντίστοιχων τέτοιων κέντρων στηρίζεται στο παραδοσιακό και ‘’ στείρο ’’ νοσοκομειακό μοντέλο. Η επέμβαση λοιπόν που θα γίνει, θα αποτελέσει το άτυπο κέντρο της περιοχής και θα φιλοξενεί ημερήσια, ημιμόνιμη και μόνιμη νοσηλεία, θα λειτουργεί όλο τον χρόνο και θα απευθύνεται τόσο στους κατοίκους της περιοχής όσο και στους υπόλοιπους κατοίκους του νόμου  και όντας σαν « κέντρο » θα εξυπηρέτηση τόσο τους κατοίκους των Βορείων προαστίων, λόγο της περιοχής, όσο και τους κατοίκους της Κεντρικής Αθήνας μέσω της κινητικότητας που θα δημιουργείται. Μιας κινητικότητας στην οποία έχουν συνηθίσει να ζούν

description: This  Thesis is directed at the Olympic Village of Acharnae , a city  of Athens , located at mount Parnithas’ foothills  . An Olympic village is traditionally founded in the most favorable areas climatic conditions of its capital.
 The purpose of this diploma thesis is to complement the rehabilitation
and reintegration into the social web of those in need. A supplement to a domain
which in Greece – perhaps , across all Europe in general- is relatively neglected,
as the majority of such centers are based on traditional and 'sterile "hospital model “.
 So , the operation that will be done will become the unofficial center of the area and will host daily, semi-permanent and permanent hospitalization, it will operate all year round and will be addressed both to residents of the area and to the rest residents of the County and , like the "center" it is gong to be, will serve both the inhabitants of the North Suburbs, because of  location of the area , and the inhabitants of Central Athens through of the mobility that will be created. A mobility they are accustomed to live.
Complete spectral characterization of biphotons by simultaneously determining its frequency sum and difference in a single quantum interferometer
Creators: name: Li, Baihong
name: Chen, Changhua
name: Yuan, Boxin
name: Hao, Xiangying
name: Jin, Rui-Bo
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We theoretically propose a novel quantum interferometer in which the NOON state interferometer (NOONI) is combined with the Hong-Ou-Mandel interferometer (HOMI). This interferometer combined the advantages of both the NOONI that depends on biphoton frequency sum, and the HOMI that depends on biphoton frequency difference into a single interferometer. It can thus simultaneously obtain the spectral correlation information of biphotons in both frequency sum and difference by taking the Fourier transform from a single time-domain quantum interferogram, which provides a method for complete spectral characterization of an arbitrary two-photon state with exchange symmetry. A direct application of such an interferometer can be found in quantum Fourier-transform spectroscopy where direct spectral measurement is difficult. Furthermore, as it can realize the measurement of time intervals on three scales at the same time, we expect that it can provide a new method in quantum metrology. Finally, we discuss another potential application of such an interferometer in the generation and characterization of high-dimensional and phase-controlled frequency entanglement.
description: 11 pages, 3 figures
The Rise of the Security Champion: Beta-Testing Newsroom Security Cultures
Creators: name: Henrichsen, Jennifer R.
Publisher: name: Columbia University
Year: 2020
Subjects: Journalism
Online journalism
Information technology--Security measures
Information services--Security measures

description: A number of factors contribute to the development of information security cultures in the newsroom, including investment in information security specialists who liaise with journalists about their specific needs and provide both informal and formal security training. Or news organizations may hire individuals in traditional roles, such as part of the IT department, but who also have information security knowledge. Journalists also bring information security knowledge into the newsroom out of curiosity, and the belief that information security practices are important for them to get stories and do their jobs. These security champions—who become trainers by accident—work to support colleagues and convince them of the need to adopt more secure practices, through informal conversations, brown-bag lunches, and training sessions at the individual, desk, and newsroom level.
Beat Schönenberger, Restitution von Kulturgut: Anspruchsgrundlagen - Restitutionshindernisse - Entwicklung
Creators: name: Weller, Matthias
Publisher: name: Kunstrechtsspiegel
Year: 2017

description: -
description: Kunstrechtsspiegel, Nr. 4 (2009): Kunstrechtsspiegel
The classification of compact simply connected biquotients in dimension 4 and 5
Creators: name: DeVito, Jason
Publisher: name: arXiv
Year: 2013
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: We classify all compact simply connected biquotients of dimension 4 and 5. In particular, all pairs of groups $(G,H)$ and embeddings $H\rightarrow G\times G$ giving rise to a particular biquotient are classified.
description: Slight corrections to Prop. 2.3 and 2.4. To appear in Differential Geometry and Applications
The Pittsburgh Problem: Race, media and everyday life in the Steel City
Creators: name: Crittenden, Letrell Deshan
Publisher: name: Columbia University
Year: 2019
Subjects: Journalism
Press
Minority journalists
African American journalists
Diversity in the workplace

description: Pittsburgh, Pennsylvania has a reputation as one of the most livable cities in the nation. This piece, however, argues that reporters of color working within the Pittsburgh media ecosystem have a much lesser quality of life both inside and outside of the newsroom. Previous studies related to diversity and inclusion within Pittsburgh’s media ecosystem highlighted two issues. First, Pittsburgh news media over-represents African Americans as a criminals. Additionally, newsrooms in the area are woefully underrepresented in terms of diversity. Based on a series of 20 interviews with journalists who are currently or have worked within the Pittsburgh news media — including 16 who identify as individuals of color — this goes beyond numbers, and gains insights on issues of diversity and inclusion directly from newsroom workers, and documents a number of concerns journalists of color have about their working conditions within the Pittsburgh media ecosystem.
UMD: Unsupervised Model Detection for X2X Backdoor Attacks
Creators: name: Xiang, Zhen
name: Xiong, Zidi
name: Li, Bo
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: Cryptography and Security (cs.CR)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Backdoor (Trojan) attack is a common threat to deep neural networks, where samples from one or more source classes embedded with a backdoor trigger will be misclassified to adversarial target classes. Existing methods for detecting whether a classifier is backdoor attacked are mostly designed for attacks with a single adversarial target (e.g., all-to-one attack). To the best of our knowledge, without supervision, no existing methods can effectively address the more general X2X attack with an arbitrary number of source classes, each paired with an arbitrary target class. In this paper, we propose UMD, the first Unsupervised Model Detection method that effectively detects X2X backdoor attacks via a joint inference of the adversarial (source, target) class pairs. In particular, we first define a novel transferability statistic to measure and select a subset of putative backdoor class pairs based on a proposed clustering approach. Then, these selected class pairs are jointly assessed based on an aggregation of their reverse-engineered trigger size for detection inference, using a robust and unsupervised anomaly detector we proposed. We conduct comprehensive evaluations on CIFAR-10, GTSRB, and Imagenette dataset, and show that our unsupervised UMD outperforms SOTA detectors (even with supervision) by 17%, 4%, and 8%, respectively, in terms of the detection accuracy against diverse X2X attacks. We also show the strong detection performance of UMD against several strong adaptive attacks.
description: Proceedings of the 40th International Conference on Machine Learning