cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Radio impulsive events in quiet solar corona and Axion Quark Nugget Dark Matter
Creators: name: Ge, Shuailiang
name: Siddiqui, Md Shahriar Rahim
name: Van Waerbeke, Ludovic
name: Zhitnitsky, Ariel
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The Murchison Widefield Array (MWA) recorded \cite{Mondal-2020} impulsive radio events in the quiet solar corona at frequencies 98, 120, 132, and 160 MHz. We propose that these radio events are the direct manifestation of dark matter annihilation events within the axion quark nugget (AQN) framework. It has been argued \cite{Zhitnitsky:2017rop,Raza:2018gpb} that the AQN annihilation events in the quiet solar corona can be identified with the nanoflares conjectured by Parker \cite{Parker-1983}. We further support this claim by demonstrating that observed impulsive radio events \cite{Mondal-2020}, including their rate of appearance, their temporal and spatial distributions and their energetics, are matching the generic consequences of AQN annihilations in the quiet corona. We propose to test this idea by analyzing the correlated clustering of impulsive radio events in different frequency bands. These correlations are expressed in terms of the time delays between radio events in different frequency bands, measured in seconds. We also make generic predictions for low (80 and 89 MHz) and high (179, 196, 217 and 240 MHz) frequency bands, that have been recorded, but not published, by \cite{Mondal-2020}. We finally suggest to test our proposal by studying possible cross-correlation between MWA radio signals and Solar Orbiter recording of extreme UV photons (a.k.a. "campfires").
description: maths the published version (Phys. Rev. D). Additional comments on non- Poissonian clustering processes and on suppression of the impulsive radio events at low frequencies below 98 MHz
DynaLay: An Introspective Approach to Dynamic Layer Selection for Deep Networks
Creators: name: Mathur, Mrinal
Publisher: name: Georgia State University
Year: 2023

description: Deep learning models have become increasingly computationally intensive, requiring extensive computational resources and time for both training and inference. A significant contributing factor to this challenge is the uniform computational effort expended on each input example, regardless of its complexity. We introduce \textbf{DynaLay}, an alternative architecture that features a decision-making agent to adaptively select the most suitable layers for processing each input, thereby endowing the model with a remarkable level of introspection. DynaLay reevaluates more complex inputs during inference, adjusting the computational effort to optimize both performance and efficiency. The core of the system is a main model equipped with Fixed-Point Iterative (FPI) layers, capable of accurately approximating complex functions, paired with an agent that chooses these layers or a direct action based on the introspection of the models inner state. The model invests more time in processing harder examples, while minimal computation is required for easier ones. This introspective approach is a step toward developing deep learning models that ``think'' and ``ponder'', rather than ``ballistically'' produce answers. Our experiments demonstrate that DynaLay achieves accuracy comparable to conventional deep models while significantly reducing computational demands.
Intensity process and compensator: A new filtration expansion approach and the Jeulin--Yor theorem
Creators: name: Guo, Xin
name: Zeng, Yan
Publisher: name: arXiv
Year: 2008
Subjects: subject: Probability (math.PR)
subject: Risk Management (q-fin.RM)
subject: FOS: Mathematics
subject: FOS: Economics and business
subject: 60H30, 60G55 (Primary) 60J99 (Secondary)

description: Let $(X_t)_{t\ge0}$ be a continuous-time, time-homogeneous strong Markov process with possible jumps and let $τ$ be its first hitting time of a Borel subset of the state space. Suppose $X$ is sampled at random times and suppose also that $X$ has not hit the Borel set by time $t$. What is the intensity process of $τ$ based on this information? This question from credit risk encompasses basic mathematical problems concerning the existence of an intensity process and filtration expansions, as well as some conceptual issues for credit risk. By revisiting and extending the famous Jeulin--Yor [Lecture Notes in Math. 649 (1978) 78--97] result regarding compensators under a general filtration expansion framework, a novel computation methodology for the intensity process of a stopping time is proposed. En route, an analogous characterization result for martingales of Jacod and Skorohod [Lecture Notes in Math. 1583 (1994) 21--35] under local jumping filtration is derived.
description: Published in at http://dx.doi.org/10.1214/07-AAP447 the Annals of Applied Probability (http://www.imstat.org/aap/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Classifying Different Cancer Types Based on Transcriptomics Data Using Machine Learning Algorithms
Creators: name: Olorunshola, Eunice
Publisher: name: Georgia State University
Year: 2023

description:
Cancer, a complex group of diseases characterized by abnormal cell growth, presents a significant global health challenge. Accurate classification of cancer types is vital for effective treatment and improved patient outcomes. This masters thesis addresses the crucial issue associated with accurate cancer classification. It analyzes transcriptomic data of RNA sequencing, from six cancer subtypes (breast, colorectal, glioblastoma, hepatobiliary, lung, pancreatic) and a healthy control group. This research utilizes several machine learning algorithms to construct accurate cancer classification models using gene expression profiles and gene count data. The study incorporates advanced techniques such as feature selection, data preprocessing, and model optimization. The primary objective is to enhance our understanding of transcriptomic signatures distinguishing one cancer type from another, with potential applications in early diagnosis, treatment selection, and biomarker discovery. Through the power of machine learning, this research contributes to advancing effective cancer classification and management strategies in this ongoing battle.
Landmarks in the U.S. Dairy Industry
Creators: name: Weimar, Mark R.
name: Blayney, Don P.
name: Weimar, Mark R.
name: Blayney, Don P.
Publisher: name: Unknown
Year: 1994
Subjects: subject: Agricultural and Food Policy
subject: Livestock Production/Industries
subject: Marketing
subject: FOS: Economics and business
subject: chronology
subject: dairy
subject: milk production
subject: milk processing
subject: manufacturing
subject: distribution
subject: public policy

description: Studying history is useful for understanding many facets of today's dairy industry—including its structure, performance, and relationship to the rest of the U.S. agricultural complex. The landmarks in this history of the U.S. dairy industry have been defined in three categories: 1) those related to milk production and handling on the farm, 2) key events in the processing, manufacturing, and distribution (marketing) of milk and dairy products, and 3) public dairy policy events. The industry's past development shapes ongoing dairy industry issues today.
Generation of sub-MHz and spectrally-bright biphotons from hot atomic vapors with a phase mismatch-free scheme
Creators: name: Hsu, Chia-Yu
name: Wang, Yu-Sheng
name: Chen, Jia-Mou
name: Huang, Fu-Chen
name: Ke, Yi-Ting
name: Huang, Emily Kay
name: Hung, Weilun
name: Chao, Kai-Lin
name: Hsiao, Shih-Si
name: Chen, Yi-Hsin
name: Chuu, Chih-Sung
name: Chen, Ying-Cheng
name: Chen, Yong-Fan
name: Yu, Ite A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We utilized the all-copropagating scheme, which maintains the phase-match condition, in the spontaneous four-wave mixing (SFWM) process to generate biphotons from a hot atomic vapor. The scheme enables our biphotons not only to surpass those in the previous works of hot-atom SFWM, but also to compete with the biphotons that are generated by either the cold-atom SFWM or the cavity-assisted spontaneous parametric down conversion. The biphoton linewidth in this work is tunable for an order of magnitude. As we tuned the linewidth to 610 kHz, the maximum two-photon correlation function, $g_{s,as}^{(2)}$, of the biphotons is 42. This $g_{s,as}^{(2)}$ violates the Cauchy-Schwartz inequality for classical light by 440 folds, and demonstrates that the biphotons have a high purity. The generation rate per linewidth of the 610-kHz biphoton source is 1,500 pairs/(s$\cdot$MHz), which is the best result of all the sub-MHz biphoton sources in the literature. By increasing the pump power by 16 folds, we further enhanced the generation rate per linewidth to 2.3$\times$10$^4$ pairs/(s$\cdot$MHz), while the maximum $g_{s,as}^{(2)}$ became 6.7. In addition, we are able to tune the linewidth down to 290$\pm$20 kHz. This is the narrowest linewidth to date, among all the various kinds of single-mode biphotons.
Decoding the Spin-Matrix limit of strings on $AdS_5 \times S^5$
Creators: name: Roychowdhury, Dibakar
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this Letter, we explore nonrelativistic string solutions in various subsectors of the $ SU(1,2|3) $ SMT strings that correspond to different spin groups and satisfy the respective BPS bounds. In particular, we carry out an explicit analysis on rotating string solutions in the light of recently proposed SMT limits. We explore newly constructed SMT limits of type IIB (super) strings on $ AdS_5 \times S^5 $ and estimate the corresponding leading order stringy corrections near the respective BPS bounds.
description: Version accepted in PLB
Satellite-based Distribution of Hybrid Entanglement
Creators: name: Do, Hung
name: Malaney, Robert
name: Green, Jonathan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Heterogeneous quantum networks consisting of mixed-technologies - Continuous Variable (CV) and Discrete Variable (DV) - will become ubiquitous as global quantum communication matures. Hybrid quantum-entanglement between CV and DV modes will be a critical resource in such networks. A leading candidate for such hybrid quantum entanglement is that between Schrödinger-cat states and photon-number states. In this work, we explore the use of Two-Mode Squeezed Vacuum (TMSV) states, distributed from satellites, as a teleportation resource for the re-distribution of our candidate hybrid entanglement pre-stored within terrestrial quantum networks. We determine the loss conditions under which teleportation via the TMSV resource outperforms direct-satellite distribution of the hybrid entanglement, in addition to quantifying the advantage of teleporting the DV mode relative to the CV mode. Our detailed calculations show that under the loss conditions anticipated from Low-Earth-Orbit, DV teleportation via the TMSV resource will always provide for significantly improved outcomes, relative to other means for distributing hybrid entanglement within heterogeneous quantum networks.
description: 15 pages; updated references and minor clarifications
Reparameterization Dependence is Useful for Holographic Complexity
Creators: name: Mounim, Ayoub
name: Mück, Wolfgang
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Holographic complexity in the "complexity equals action" approach is reconsidered relaxing the requirement of reparameterization invariance of the action with the prescription that the action vanish in any vacuum causal diamond. This implies that vacuum anti-de Sitter space plays the role of the reference state. Moreover, the complexity of an anti-de Sitter-Schwarzschild black hole becomes intrinsically finite and saturates Lloyd's bound after a critical time. It is also argued that several artifacts, such as the unphysical negative-time interval, can be removed by truly considering the bulk dual of the thermofield double state.
description: 33 pages, 7 figures, v2: references added, v3: added section on BTZ black hole, version to appear in JHEP
Motion Generation Using Bilateral Control-Based Imitation Learning with Autoregressive Learning
Creators: name: Sasagawa, Ayumu
name: Sakaino, Sho
name: Tsuji, Toshiaki
Publisher: name: arXiv
Year: 2020
Subjects: subject: Robotics (cs.RO)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Robots that can execute various tasks automatically on behalf of humans are becoming an increasingly important focus of research in the field of robotics. Imitation learning has been studied as an efficient and high-performance method, and imitation learning based on bilateral control has been proposed as a method that can realize fast motion. However, because this method cannot implement autoregressive learning, this method may not generate desirable long-term behavior. Therefore, in this paper, we propose a method of autoregressive learning for bilateral control-based imitation learning. A new neural network model for implementing autoregressive learning is proposed. In this study, three types of experiments are conducted to verify the effectiveness of the proposed method. The performance is improved compared to conventional approaches; the proposed method has the highest rate of success. Owing to the structure and autoregressive learning of the proposed model, the proposed method can generate the desirable motion for successful tasks and have a high generalization ability for environmental changes.
description: Copyright 2021 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works
Tra cinema e fumetto: due usi del montaggio
Creators: name: Saitta, Giuseppe
Publisher: name: Università degli Studi di Milano
Year: 2016

description: Entrambi linguaggi visivi, ove la narrazione si dipana grazie al rapporto di interdipendenza cheogni singola immagine intrattiene con l'immagine che la precede e quella che le succede.

Pur dovendo ricorrere dunque a un montaggio di immagini, fumetto e cinema presentano tra di loro grandi differenze, ma anche grandi similitudini.

Cercheremo di scoprire quali sono affidandoci all'analisi della duplice trasposizione di "300" da parte di Frank Miller e Zack Snyder.
description: ENTHYMEMA, No 13 (2015)
A possible line-like emission feature at 8 keV in the Seyfert 1.2 UGC 3973
Creators: name: Gallo, L. C.
name: Fabian, A. C.
name: Boller, Th.
name: Pietsch, W.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Two short X-ray exposures (< 3600 s each) of the radio-quiet Seyfert 1.2 galaxy UGC 3973 (Mrk 79) were conducted with XMM-Newton as part of an AGN snap-shot survey. In this paper we concentrate on the significance and possible origin of a narrow 8 keV (rest-frame) line-like emission feature detected with the pn instrument during the second observation. Simulations show that the feature is significant at 96.0-98.4% confidence, depending on what a priori assumptions are made. The feature cannot be attributed to background contamination and appears to be variable (or transient) since it was not detected in the first observation of UGC 3973 six months earlier. However, a constant feature cannot be completely dismissed, based on the 90% upper-limit on the flux from the first observation. There is some indication that the feature is variable over the duration of the second observation as well. We discuss various models (e.g. Ni emission, recombination edges, outflows, disc lines) which could potentially produce an emission feature at such energies.
description: 7 pages, 7 figures. Accepted for publication in MNRAS
Ionic liquids for separation of aromatics and aliphatics : extraction and using CO₂ as a gas antisolvent
Creators: name: Lubben, Michael J.
name: 0009-0000-2212-6470
Publisher: name: The University of Texas at Austin
Year: 2023
Subjects: Ionic liquids
Separations
Phase equilibria
Extraction

description: In the production of aromatic compounds, it is necessary to separate aromatic products from aliphatic compounds, which is achieved through liquid-liquid extraction. Due to several drawbacks from the current industrial processes for this separation, ionic liquids (ILs) have drawn interest as potential solvents for this separation. Additionally, it has been shown that CO₂ can be used as a gas antisolvent to induce liquid-liquid phase splits in mixtures of aromatic hydrocarbons and ILs, which could potentially separate aromatics from ILs. Additional understanding and improvements are needed to see if these are reasonable separation processes. This dissertation aims to use experimental results to further understand the underlying phenomena driving phase behavior in these systems. Liquid-liquid equilibrium (LLE) experiments of n-heptane + toluene + IL were carried out with ILs selected based on various criteria: structure, size, modeling results from a colleague, cation differentiation, and wanting to test mixtures of ILs compared with individual ILs containing the same functional groups (hybrid ILs). All of the ILs tested exhibited selectivity towards toluene over heptane, with many having excellent selectivity and high capacity for dissolving toluene. Phosphonium and sulfonium ILs performed similarly or better as extraction solvents than the equivalent imidazolium, and some potential advantages of using mixture and hybrid ILs are presented. Vapor-liquid equilibrium (VLE) experiments were used to measure CO₂ solubility in xylene isomers, ILs and mixtures. Ternary systems exhibited vapor+liquid to vapor+liquid+liquid phase transitions, with significantly different amounts and pressure of CO₂ required to induce a phase split depending on the xylene isomer. Despite these differences, ILs showed no selectivity towards one xylene isomer over another in ambient pressure LLE experiments. Density and heat of mixing measurements for ILs with aromatics and aliphatics were used to calculate excess properties and either confirm or deny several of the hypotheses about what was causing different phase behavior in LLE and VLE experiments. The combined results of these various experiments offer insight into phase equilibria of ILs with nonpolar compounds and how volume expansion of the IL-rich phase plays a key role.
Effects of surface topography on low Reynolds number droplet/bubble flow through constricted passage
Creators: name: Singla, Aditya
name: Ray, Bahni
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: This paper is an attempt to study the effects of surface topography on the flow of a droplet (or a bubble) in a low Reynolds number flow regime. Multiphase flows through a constricted passage find many interesting applications in chemistry and biology. The main parameters which determine the flow properties such as flow rate and pressure drop, and govern the complex multiphase phenomena such as drop coalescence, break-up and snap-off in a straight channel flow are the viscosity ratio, droplet size and ratio of the viscous forces to the surface tension forces (denoted by Capillary number). But in flow through a constricted passage, in addition to the above-mentioned parameters, various other geometric parameters such as constriction ratio, length and shape of the constriction, phase angle, and spacing between the constrictions also start playing an important role. Most of the studies done on the problem of drop flow through a constricted passage have aimed to understand the role of physical parameters, with some studies extending their analysis to understand the variation of one or two geometric parameters. But no study could be found which explicitly evaluates the role of surface topography. An attempt has been made to unify the current literature as well as analyze the effect of the geometric parameters by understanding the physics and mechanisms involved. The non-dimensional numbers which govern this problem are then identified using the scaling analysis.
description: 29 pages, 21 figures
Shape programming lines of concentrated Gaussian curvature
Creators: name: Duffy, D.
name: Cmok, L.
name: Biggins, J. S.
name: Krishna, A.
name: Modes, C. D.
name: Abdelrahman, M. K.
name: Javed, M.
name: Ware, T. H.
name: Feng, F.
name: Warner, M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Liquid crystal elastomers (LCEs) can undergo large reversible contractions along their nematic director upon heating or illumination. A spatially patterned director within a flat LCE sheet thus encodes a pattern of contraction on heating, which can morph the sheet into a curved shell, akin to how a pattern of growth sculpts a developing organism. Here we consider, theoretically, numerically and experimentally, patterns constructed from regions of radial and circular director, which, in isolation, would form cones and anticones. The resultant surfaces contain curved ridges with sharp V-shaped cross-sections, associated with the boundaries between regions in the patterns. Such ridges may be created in positively and negatively curved variants and, since they bear Gauss curvature (quantified here via the Gauss-Bonnet theorem), they cannot be flattened without energetically prohibitive stretch. Our experiments and numerics highlight that, although such ridges cannot be flattened isometrically, they can deform isometrically by trading the (singular) curvature of the V angle against the (finite) curvature of the ridge line. Furthermore, in finite thickness sheets, the sharp ridges are inevitably non-isometrically blunted to relieve bend, resulting in a modest smearing out of the encoded singular Gauss curvature. We close by discussing the use of such features as actuating linear features, such as probes, tongues and limbs, and highlighting the similarities between these patterns of shape change and those found during the morphogenesis of several biological systems.
description: This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Journal of Applied Physics 129, 224701 (2021) and may be found at https://doi.org/10.1063/5.0044158
title: Aloe spp. Αλόη, οι χρήσεις της στην Κοσμητολογία.
title: Aloe spp., its uses in Cosmetology.
titleType: AlternativeTitle
Creators: name: Σπηλιώτη, Παρασκευή
Publisher: name: Πανεπιστήμιο Δυτικής Αττικής
Year: 2023
Subjects: Αλόη
Πολυσακχαρίτες
Καινοτομία
Πολυφαινόλες
Ακεμανάνη

description: Η «αναζήτηση» χαρακτηριστικό του ανθρώπινου είδους, τον οδήγησε συχνά στην φύση προκειμένου να επιλύσει προβλήματα όπως η διατήρηση της νεότητας ή η θεραπεία της ασθένειας. Η « φύση» με τη σειρά της, όντας γαλαντόμος με τον άνθρωπο, του χάρισε όχι μόνο καρπούς προς θρέψη αλλά και ποικιλία δρογών προκειμένου να αντιμετωπίσει την ασθένεια αλλά να διατηρήσει και τη νεότητα. Η αλόη ως δρόγη που χαρίζει «ομορφιά» θα αποτελέσει αντικείμενο μελέτης της συγκεκριμένης διπλωματικής εργασίας. Η εν λόγω μελέτη αποτελεί είδος βιβλιογραφικής ανασκόπησης που σκοπό έχει να επικαιροποιήσει τα έως τώρα δεδομένα για τη χρήση της αλόης στον χώρο της Κοσμετολογίας, να αναδείξει νέες δυνατότητες, αλλά να αποτελέσει και εφαλτήριο για πιθανή έρευνα. Η αλόη είναι γνωστή για τις αντιοξειδωτικές, επουλωτικές, λευκαντικές και ενυδατικές ιδιότητες. Τί γνωρίζουμε όμως για την συνεργική της δράση στην ακμή, ως ικρίωμα στην μηχανική ιστών, ή στην ανίχνευση ουσιών υπό παρακολούθηση, στις κοσμετολογικές φόρμουλες; Οι πολυσακχαρίτες, οι πολυφαινόλες, τα τερπένια, οι στερόλες οι βιταμίνες και άλλα τόσα, είναι συστατικά που εντοπίζονται κατά βάση στο εσωτερικό ζελατινώδες περιεχόμενο της αλόης. Σε αυτά οφείλονται οι αντιοξειδωτική, αντιγηραντική, ενυδατική και λευκαντική δράση της αλόης σχετιζόμενες πάντα με τον χώρο της κοσμετολογίας. Έρευνες ωστόσο έχουν δείξει πως υπάρχει και συνεργική δράση της αλόης στην αντιμετώπιση της κοινής ακμής. Τελευταία η χρήση της αλόης έχει επεκταθεί και στον τομέα της νανοτεχνολογίας συντελώντας σε πιθανή βελτίωση αισθητικών πράξεων καθώς και στην σύνθεση κοσμετολογικών προϊόντων. Συμπερασματικά θα μπορούσε να αναφερθεί πως η αλόη αποτέλεσε δρόγη του παρελθόντος, αλλά θα αποτελέσει και δρόγη του μέλλοντος, λαμβανομένης υπόψη της επιτακτικής ανάγκης για αειφόρο ανάπτυξη των φυσικών πόρων στον χώρο της Κοσμετολογίας, δεδομένων των εξελίξεων της κλιματικής αλλαγής.
Seamless high-Q microwave cavities for multimode circuit QED
Creators: name: Chakram, Srivatsan
name: Oriani, Andrew E.
name: Naik, Ravi K.
name: Dixit, Akash V.
name: He, Kevin
name: Agrawal, Ankur
name: Kwon, Hyeokshin
name: Schuster, David I.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Multimode cavity quantum electrodynamics ---where a two-level system interacts simultaneously with many cavity modes---provides a versatile framework for quantum information processing and quantum optics. Due to the combination of long coherence times and large interaction strengths, one of the leading experimental platforms for cavity QED involves coupling a superconducting circuit to a 3D microwave cavity. In this work, we realize a 3D multimode circuit QED system with single photon lifetimes of $2$ ms and cooperativities of $0.5-1.5\times10^9$ across 9 modes of a novel seamless cavity. We demonstrate a variety of protocols for universal single-mode quantum control applicable across all cavity modes, using only a single drive line. We achieve this by developing a straightforward flute method for creating monolithic superconducting microwave cavities that reduces loss while simultaneously allowing control of the mode spectrum and mode-qubit interaction. We highlight the flexibility and ease of implementation of this technique by using it to fabricate a variety of 3D cavity geometries, providing a template for engineering multimode quantum systems with exceptionally low dissipation. This work is an important step towards realizing hardware efficient random access quantum memories and processors, and for exploring quantum many-body physics with photons.
description: 5 pages of main text with 4 figures. 9 pages of supplementary information with 7 figures
Galaxies in the Hubble Ultra Deep Field: I. Detection, Multiband Photometry, Photometric Redshifts, and Morphology
Creators: name: Coe, Dan
name: Benitez, Narciso
name: Sanchez, Sebastian F.
name: Jee, Myungkook
name: Bouwens, Rychard
name: Ford, Holland
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present aperture-matched PSF-corrected BVi'z'JH photometry and Bayesian photometric redshifts (BPZ) for objects detected in the Hubble Ultra Deep Field (UDF), 8,042 of which are detected at the 10-sigma level (e.g., i'<29.01 or z'<28.43). Most of our objects are defined identically to those in the public STScI catalogs, enabling straightforward object-by-object comparison. We have combined detections from i', z', J+H, and B+V+i'+z' images into a single comprehensive segmentation map. Using a new program called SExSeg we are able to force this segmentation map into SExtractor for photometric analysis. The resulting photometry is corrected for the wider NIC3 PSFs using our ColorPro software. We also correct for the ACS z'-band PSF halo. The NIC3 magnitudes are found to be too faint relative to the ACS fluxes. Based on BPZ SED fits to objects of know spectroscopic redshift, we derived corrections of -0.30 +/- 0.03 mag in J and -0.18 +/- 0.04 mag in H. The offsets appear to be supported by a recent recalibration of the UDF NIC3 images combined with non-linearity measured in NICMOS itself. The UDF reveals a large population of faint blue galaxies (presumably young starbursts), bluer than those observed in the original Hubble Deep Fields (HDF). To accommodate these galaxies, we have added two new starburst templates to the SED library used in previous BPZ papers. The resulting photometric redshifts are accurate to within 0.04 * 1+z_spec out to z < 6. Finally, we measure galaxy morphology, including Sersic index and asymmetry. Our full catalog, software packages, and more are available at http://adcam.pha.jhu.edu/~coe/UDF/ (abridged)
description: Accepted by AJ. 82 pages, 35 figures, 10 tables. At http://adcam.pha.jhu.edu/~coe/UDF/ you can find: full-resolution versions of the paper (color; B&W compact); our full catalogs and segmentation map; our SExSeg & ColorPro software packages; a clickable color image map of the UDF
Time-Series Snapshot Network for Partner Recommendation: A Case Study on OSS
Creators: name: Xie, Yunyi
name: Chen, Jinyin
name: Zhang, Jian
name: Shu, Xincheng
name: Xuan, Qi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences

description: The last decade has witnessed the rapid growth of open source software (OSS). Still, all contributors may find it difficult to assimilate into OSS community even they are enthusiastic to make contributions. We thus suggest that partner recommendation across different roles may benefit both the users and developers, i.e., once we are able to make successful recommendation for those in need, it may dramatically contribute to the productivity of developers and the enthusiasm of users, thus further boosting OSS projects' development. Motivated by this potential, we model the partner recommendation as link prediction task from email data via network embedding methods. In this paper, we introduce time-series snapshot network (TSSN) which is a mixture network to model the interactions among users and developers. Based on the established TSSN, we perform temporal biased walk (TBW) to automatically capture both temporal and structural information of the email network, i.e., the behavioral similarity between individuals in the OSS email network. Experiments on ten Apache datasets demonstrate that the proposed TBW significantly outperforms a number of advanced random walk based embedding methods, leading to the state-of-the-art recommendation performance.
Four-nucleon force in chiral effective field theory
Creators: name: Epelbaum, E.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We derive the leading contribution to the four-nucleon force within the framework of chiral effective field theory. It is governed by the exchange of pions and the lowest-order nucleon-nucleon contact interaction and includes effects due to the nonlinear pion-nucleon couplings and the pion self interactions constrained by the chiral symmetry of QCD. The resulting four-nucleon force does not contain any unknown parameters and can be tested in few- and many-nucleon studies.
description: 4 pages, 4 figures
The C*-algebras Associated to Time-$t$ Automorphisms of Mapping Tori
Creators: name: Itzá-Ortiz, Benjamín
Publisher: name: arXiv
Year: 2005
Subjects: subject: Operator Algebras (math.OA)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: Primary, 46L55, 37B05; Seconday 37A55, 46L35, 54H20

description: We find the range of a trace on the $K_0$ group of a crossed product by a time-$t$ automorphism of a mapping torus. We also find a formula to compute the Voiculescu-Brown entropy for such an automorphism. By specializing to the commutative setting, we prove that the crossed products by minimal time-t homeomorphisms of suspensions built over strongly orbit equivalent Cantor minimal systems have isomorphic Elliott invariants. As an application of our results we give examples of dynamical systems on (compact metric) connected 1-dimensional spaces which are not flip conjugate (because of different entropy) yet their associated crossed products have isomorphic Elliott invariants.
title: Νομική & κοινωνική προσέγγιση της παραστατικής τέχνης του χορού στο αναλογικό και ψηφιακό περιβάλλον
title: Legal and social approach to the performing art of dance in the analogue and digital world
titleType: AlternativeTitle
Creators: name: Δεληγιαννίδου, Μυρσίνη
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2023
Subjects: subject: Χορός
subject: Πνευματική ιδιοκτησία
subject: Νέες τεχνολογίες
subject: Τεχνητή νοημοσύνη
subject: Μετασύμπαν
subject: Άβαταρ
subject: Χορογραφία
subject: Εικονική πραγματικότητα
subject: Dance
subject: Artificial intelligence
subject: Metaverse
subject: Avatar
subject: Intellectual property
subject: Choreography
subject: Art
subject: Τέχνη
subject: NFT
subject: Non fungible token
subject: Χορογραφικό έργο
subject: Παραστατική τέχνη
subject: Performance art‎

description: Στην παρούσα εργασία επιχειρείται, μέσω νομικής και κοινωνικής προσέγγισης, η μελέτη της παραστατικής τέχνης του χορού, τόσο σε αναλογικό όσο και σε ψηφιακό περιβάλλον. Αρχικά, ο χορός περιγράφεται ως μορφή παραστατικής τέχνης αλλά και ως κοινωνική πράξη. Από το απώτατο παρελθόν ως σήμερα, η τέχνη αυτή αποτελεί το οπτικό αποτύπωμα της μη λεκτικής επικοινωνίας μεταξύ των ανθρώπων, οι οποίοι χρησιμοποιώντας τη γλώσσα του σώματος εκφράζουν νοήματα, ιδέες, προθέσεις, ένστικτα, συναισθήματα. Ως τέχνη, ο χορός, αποτελεί μέρος κάθε πολιτισμού και, ταυτόχρονα, μια πηγή παραβίασης των δικαιωμάτων της πνευματικής ιδιοκτησίας. Γι’ αυτό, στη συνέχεια, εξετάζεται η έννοια του χορογραφικού έργου και τα δικαιώματα του δημιουργού χορογραφίας στο δίκαιο της πνευματικής ιδιοκτησίας, καθώς και το πλαίσιο έννομης προστασίας αυτών. Οι δυσκολίες που υπήρχαν λόγω εγγενών χαρακτηριστικών αυτής της μορφής παραστατικής τέχνης, ξεπεράστηκαν κατά τον 20ο αιώνα, πρώτα με την ανάπτυξη της σημειογραφίας του χορού, και έπειτα με την ανάδυση των νέων τεχνολογιών καταγραφής και μετάδοσης χορών, οι οποίες με την σειρά τους αποτέλεσαν πηγή νέων προκλήσεων και διαφωνιών, ιδίως τα τελευταία χρόνια με την συγχώνευση του πραγματικού και του ψηφιακού κόσμου. Στο πλαίσιο αυτό, η οικειοποίηση χορογραφικών βημάτων έχει γίνει πιο εύκολη από ποτέ, θολώνοντας τα όρια μεταξύ έμπνευσης και παράνομης οικειοποίησης. Ακόμη κι όταν το ρόλο του διαδικτύου θα επιτελεί το metaverse, το οποίο αποτελεί στον πυρήνα του μία τεχνολογία με κοινωνικό ρόλο, καθώς διευκολύνει την ανθρώπινη σύνδεση και την αυτοέκφραση, η παραστατική τέχνη του χορού θα υπάρχει κι εκεί. Μέσα από μία απόπειρα χαρτογράφησης του metaverse, προσεγγίζεται το ζήτημα της δημιουργίας χορογραφικού έργου, παρουσιάζονται ζητήματα που ανακύπτουν σε σχέση με τα δικαιώματα του δημιουργού – χορογράφου, εξετάζεται η έννοια των avatars καθώς και η δυνατότητα παροχής δικαιωμάτων σε αυτά. Τέλος, ερευνάται εάν οι ισχύοντες κανόνες περί πνευματικών δικαιωμάτων μπορούν να εφαρμοστούν στο metaverse ή εάν υφίσταται ανάγκη θέσπισης ενός κανονιστικού συστήματος αποκλειστικά για το συγκεκριμένο τρισδιάστατο εικονικό περιβάλλον.
Field notes
Creators: name: Lapierre, Myriam
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2020
Subjects: subject: kre

description: From third field trip to field site, which lasted 49 days. Notes mostly contain the researcher's thoughts on various topics of phonology, including the segmental inventory, syllables, feet, stress, and metricality. Notes were not obtained during elicitation, but rather during conversations with members of the Panära community.
An ivestigation of triply heavy baryon production at hadron colliders
Creators: name: Nobary, M. A. Gomshi
name: Sepahvand, R.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The triply heavy baryons have a rather diverse mass range. While some of them possess considerable production rates at existing facilities, others need to be produced at future high energy colliders. Here we study the direct fragmentation production of the$Ω_{ccc}$ and $Ω_{bbb}$ baryons as the prototypes of triply heavy baryons at the hadron colliders with different $\sqrt{s}$. We present and compare the transverse momentum distributions of the differential cross sections, $p_T^{\rm min}$ distributions of total cross sections and the integrated total cross sections of these states at the RHIC, the Tevatron Run II and the CERN LHC.
description: 9 pages, 5 figures, To appear in Nuclear Physics B
Non-Linear Beam Splitter in Bose-Einstein Condensate Interferometers
Creators: name: Pezze', L.
name: Smerzi, A.
name: Berman, G. P.
name: Bishop, A. R.
name: Collins, L. A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A beam splitter is an important component of an atomic/optical Mach-Zehnder interferometer. Here we study a Bose Einstein Condensate beam splitter, realized with a double well potential of tunable height. We analyze how the sensitivity of a Mach Zehnder interferometer is degraded by the non-linear particle-particle interaction during the splitting dynamics. We distinguish three regimes, Rabi, Josephson and Fock, and associate to them a different scaling of the phase sensitivity with the total number of particles.
description: draft, 19 pages, 10 figures
title: Η ιατρικώς υποβοηθούμενη αναπαραγωγή : οι μέθοδοι, νομικά, οικονομικά και ηθικά ζητήματα
title: Medically assisted reproduction - The methods, legal, economic and ethical issues
titleType: AlternativeTitle
Creators: name: Σταθοπούλου, Παναγιώτα
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2023
Subjects: subject: Ιατρικώς υποβοηθούμενη αναπαραγωγή
subject: Εξωσωματική γονιμοποίηση
subject: Υπογονιμότητα

description: Στις μέρες μας, περισσότερα από 90 εκατομμύρια ζευγάρια αντιμετωπίζουν κάποιο πρόβλημα σύλληψης. Έτσι αποφασίζουν να καταφύγουν στην εφαρμογή μεθόδων ιατρικώς υποβοηθούμενης αναπαραγωγής ώστε να καταφέρουν να αποκτήσουν ένα παιδί. Η αλματώδης ανάπτυξη της επιστήμης, τα τελευταία χρόνια, στον τομέα της ιατρικώς υποβοηθούμενης αναπαραγωγής τους δίνει την δυνατότητα να επιλέξουν μέσα από μια ευρεία γκάμα μεθόδων ποια είναι η καλύτερη και αποτελεσματικότερη μέθοδος για αυτούς ώστε να φτάσουν στον στόχο τους. Σκοπός της παρούσας εργασίας είναι να αναλυθούν τα είδη της ιατρικώς υποβοηθούμενης αναπαραγωγής, οι νομικές, οικονομικές και ηθικές διαστάσεις της ιατρικώς υποβοηθούμενης αναπαραγωγής. Πιο συγκεκριμένα παρουσιάζονται αναλυτικά οι μέθοδοι της ιατρικώς υποβοηθούμενης αναπαραγωγής, η ιστορία της και το νομικό πλαίσιο, όπως έχει διαμορφωθεί μέχρι και σήμερα στην Ελλάδα. Επιπλέον, διερευνάται το κόστος των μεθόδων τόσο στην χώρα μας όσο και σε άλλες ευρωπαϊκές χώρες όπως Γαλλία, Γερμανία και Ηνωμένο Βασίλειο και η κάλυψη από τα ασφαλιστικά ταμεία της χώρας μας, ενώ παρουσιάζονται και τα μέσα κόστη της ιατρικώς υποβοηθούμενης αναπαραγωγής σε κράτη όπως Ολλανδία, Ιταλία, Πολωνία, Αυστρία, Τουρκία, Ρωσία κ.α. Τέλος γίνεται αναφορά σε στατιστικά στοιχεία της εξωσωματικής γονιμοποίησης για τα έτη 2013-2015 και 2018-2019 και συγκρίνονται με το Α.Ε.Π. ενώ διερευνώνται κοινωνικά και ηθικά ζητήματα που προκύπτουν στο πλαίσιο της ιατρικώς υποβοηθούμενης αναπαραγωγής.
Search for Randall-Sundrum Gravitons in Dilepton and Diphoton Final States
Creators: name: D0 Collaboration
name: Abazov, V. M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We report the first direct search for the Kaluza-Klein (KK) modes of Randall-Sundrum gravitons using dielectron, dimuon, and diphoton events observed with the D0 detector operating at the Fermilab Tevatron ppbar Collider at sqrt(s) = 1.96 TeV. No evidence for resonant production of gravitons has been found in the data corresponding to an integrated luminosity of approximately 260 pb^-1. Lower limits on the mass of the first KK mode at the 95% C.L. have been set between 250 and 785 GeV, depending on its coupling to SM particles.
description: 7 pages, 3 figures, 1 table. Published in Phys. Rev. Lett. Minor changes in v2 to match the published version
An extended halo around an ancient dwarf galaxy
Creators: name: Chiti, Anirudh
name: Frebel, Anna
name: Simon, Joshua D.
name: Erkal, Denis
name: Chang, Laura J.
name: Necib, Lina
name: Ji, Alexander P.
name: Jerjen, Helmut
name: Kim, Dongwon
name: Norris, John E.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The Milky Way is surrounded by dozens of ultra-faint (< $10^5$ solar luminosities) dwarf satellite galaxies. They are the surviving remnants of the earliest galaxies, as confirmed by their ancient (~13 billion years old) and chemically primitive stars. Simulations suggest that these systems formed within extended dark matter halos and experienced early galaxy mergers and supernova feedback. However, the signatures of these events would lie outside their core regions (>2 half-light radii), which are spectroscopically unstudied due to the sparseness of their distant stars. Here we identify members of the Tucana II ultra-faint dwarf galaxy in its outer region (up to 9 half-light radii), demonstrating the system to be dramatically more spatially extended and chemically primitive than previously found. These distant stars are extremely metal-poor (=-3.02; less than ~1/1000th of the solar iron abundance), affirming Tucana II as the most metal-poor known galaxy. We observationally establish, for the first time, an extended dark matter halo surrounding an ultra-faint dwarf galaxy out to one kiloparsec, with a total mass of >$10^7$ solar masses. This measurement is consistent with the expected ~2x$10^7$ solar masses using a generalized NFW density profile. The extended nature of Tucana II suggests that it may have undergone strong bursty feedback or been the product of an early galactic merger. We demonstrate that spatially extended stellar populations, which other ultra-faint dwarfs hint at hosting as well, are observable in principle and open the possibility for detailed studies of the stellar halos of relic galaxies.
description: Published in Nature Astronomy on February 1, 2021 at https://www.nature.com/articles/s41550-020-01285-w. Free read-only access at https://rdcu.be/cezEm
Production of Slow Protonium in Vacuum
Creators: name: Zurlo, N.
name: Amoretti, M.
name: Amsler, C.
name: Bonomi, G.
name: Carraro, C.
name: Cesar, C. L.
name: Charlton, M.
name: Doser, M.
name: Fontana, A.
name: Funakoshi, R.
name: Genova, P.
name: Hayano, R. S.
name: Jorgensen, L. V.
name: Kellerbauer, A.
name: Lagomarsino, V.
name: Landua, R.
name: Rizzini, E. Lodi
name: Macri', M.
name: Madsen, N.
name: Manuzio, G.
name: Mitchard, D.
name: Montagna, P.
name: Posada, L. G.
name: Pruys, H.
name: Regenfus, C.
name: Rotondi, A.
name: Testera, G.
name: Van der Werf, D. P.
name: Variola, A.
name: Venturelli, L.
name: Yamazaki, Y.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We describe how protonium, the quasi-stable antiproton-proton bound system, has been synthesized following the interaction of antiprotons with the molecular ion H$_2^+$ in a nested Penning trap environment. From a careful analysis of the spatial distributions of antiproton annihilation events in the ATHENA experiment, evidence is presented for protonium production with sub-eV kinetic energies in states around $n$ = 70, with low angular momenta. This work provides a new 2-body system for study using laser spectroscopic techniques.
description: 9 pages with 5 figures and 1 table. Proceedings of the 4th International Conference on Trapped Charged Particles and Fundamental Physics (TCP 06), published in Hyperfine Interactions
title: Tα κριτήρια του ΕΔΔΑ ως προς την αποτελεσματική προστασία του δικαιώματος στο απόρρητο της επικοινωνίας - Κριτική αποτίμηση του εγχώριου κανονιστικού πλαισίου
title: Guidelines of the European Court of Human Rights on article 8 of the European Convention on Human Rights : a critical assessment of the compliance of the Greek legislation with the case-law of European Court of Human Rights
titleType: AlternativeTitle
Creators: name: Παπαδημητρίου, Μαργαρίτα
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2023
Subjects: subject: Άρση απορρήτου

description: H εν λόγω εργασία πραγματεύεται το πλαίσιο άρσης του απορρήτου σε ενωσιακό και εθνικό επίπεδο. Ειδικότερα, εστιάζει στα κριτήρια που διαπλάστηκαν σύμφωνα τη νομολογία του ΕΔΔΑ, τα οποία καθιστούν κατ’ εξαίρεση επιτρεπτό τον περιορισμό του δικαιώματος στην ιδιωτικότητα, μέσω της άρσης του απορρήτου των επικοινωνιών, αποσκοπώντας στην αποτελεσματική προστασία των υποκειμένων του εν λόγω δικαιώματος και επιχειρεί την κριτική αποτίμησή τους σε συνάρτηση με το εγχώριο κανονιστικό πλαίσιο. Εισαγωγικώς, γίνεται ανάλυση των προστατευόμενων εννόμων αγαθών. Ειδικότερα, προσεγγίζονται οι έννοιες της ιδιωτικότητας και της απόρρητης επικοινωνίας και παρατίθενται τα βασικά τους χαρακτηριστικά. Μετά ταύτα, ακολουθεί ο προσδιορισμός των εννοιών των σχετικών δικαιωμάτων, του δικαιώματος στην ιδιωτική ζωή και της ειδικότερης έκφανσης αυτού, ήτοι του δικαιώματος στην ελεύθερη και απόρρητη επικοινωνία. Στη συνέχεια, παρουσιάζεται το νομικό πλαίσιο, δυνάμει του οποίου τα ως άνω έννομα αγαθά κατοχυρώνονται τόσο σε εθνικό όσο και σε υπερεθνικό (διεθνές και ενωσιακό) επίπεδο και αναλύονται τα κείμενα και τα νομοθετήματα σταθμοί στη θέσπιση του απαραβίαστου αυτών. Ιδιαίτερη έμφαση δίδεται στην ΕΣΔΑ, το άρθρο 8 της οποίας συνιστά το νομοθετικό θεμέλιο για την προστασία του απορρήτου των επικοινωνιών και για τη νομολογιακή σμίλευση των κριτηρίων για τον σύμφωνο με την αρχή της αναλογικότητας περιορισμό του δικαιώματος. Μετά ταύτα, αναπτύσσονται τα αντλούμενα από το εν λόγω άρθρο της ΕΣΔΑ κριτήρια του ΕΔΔΑ, με την πλήρωση των οποίων, καθίσταται κατ’ εξαίρεση επιτρεπτή η άρση του απορρήτου των επικοινωνιών. Ειδικότερα, εξετάζονται ο σκοπός, οι λόγοι και οι δικλείδες ασφαλείας που, σύμφωνα με το άρθρο 8 της ΕΣΔΑ, καθιστούν, σύμφωνα με το Δικαστήριο του Στρασβούργου, παραδεκτό τον περιορισμό του δικαιώματος στην ελεύθερη, απρόσκοπτη και απόρρητη επικοινωνία σε ένα κράτος δικαίου. Ύστερα, αποτυπώνεται το νομοθετικό πλαίσιο και η συναφής διαδικασία για την άρση του απορρήτου στην Ελλάδα και καταγράφονται οι ιδιαιτερότητες και τα ζητήματα που έχουν απασχολήσει τη θεωρία και τη νομολογία. Τέλος, μετά την ανάλυση όλων των ανωτέρω επί μέρους ζητημάτων, επιχειρείται συγκριτική παρατήρηση και σχολιασμός του βαθμού εναρμόνισης της ελληνικής πραγματικότητας με τα επίπεδα προστασίας που θέτει η ενωσιακή έννομη τάξη, ώστε να διαπιστωθεί αν το εν ισχύ νομοθετικό πλαίσιο της Ελλάδος ανταποκρίνεται στις υποχρεώσεις της ως κράτος-μέλους της ΕΕ και κατ’ επέκταση αν διασφαλίζονται επαρκώς τα έννομα συμφέροντα και τα θεμελιώδη δικαιώματα των πολιτών.
Spin Photovoltaic Effect in Quantum Wires with Rashba Interaction
Creators: name: Pershin, Yuriy V.
name: Piermarocchi, Carlo
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We propose a mechanism for spin polarized photocurrent generation in quantum wires. The effect is due to the combined effect of Rashba spin-orbit interaction, external magnetic field and microwave radiation. The time-independent interactions in the wire give rise to a spectrum asymmetry in k-space. The microwave radiation induces transitions between spin-splitted subbands, and, due to the peculiar energy dispersion relation, charge and spin currents are generated at zero bias voltage. We demonstrate that the generation of pure spin currents is possible under an appropriate choice of external control parameters.