cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Constraints on Meta-stable de Sitter Flux Vacua
Creators: name: Soroush, Masoud
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider flux compactification of type IIB string theory as the orientifold limit of an F-theory on a Calabi-Yau fourfold. We show that when supersymmetry is dominantly broken by the axion-dilaton and the contributions of the F-terms associated with complex structure moduli are small, the Hessian of the flux potential always has tachyonic modes for de Sitter vacua. This implies that there exist no meta-stable de Sitter vacua in this limit. Moreover, we find that the stability requirement imposes a relation between the values of cosmological constant and the scale of supersymmetry breaking for non-supersymmetric anti de Sitter vacua in this limit. The proof is general and does not rely on the details of the geometry of the compact Calabi-Yau internal space. We finally analyze the consequences of these constraints on the statistics of meta-stable de Sitter vacua and address some other related issues.
description: 22 pages, 2 figures, LaTeX; v2: typos corrected, references added
Consequences of constant elevation scans for instrumental systematics in Cosmic Microwave Background Experiments
Creators: name: Thomas, Daniel B.
name: McCallum, Nialh
name: Brown, Michael L.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Instrumental systematics need to be controlled to high precision for upcoming Cosmic Microwave Background (CMB) experiments. The level of contamination caused by these systematics is often linked to the scan strategy, and scan strategies for satellite experiments can significantly mitigate these systematics. However, no detailed study has been performed for ground-based experiments. Here we show that under the assumption of constant elevation scans (CESs), the ability of the scan strategy to mitigate these systematics is strongly limited, irrespective of the detailed structure of the scan strategy. We calculate typical values and maps of the quantities coupling the scan to the systematics, and show how these quantities vary with the choice of observing elevations. These values and maps can be used to calculate and forecast the magnitude of different instrumental systematics without requiring detailed scan strategy simulations. As a reference point, we show that inclusion of even a single boresight rotation angle significantly improves over sky rotation alone for mitigating these systematics. A standard metric for evaluating cross-linking is related to one of the parameters studied in this work, so a corollary of our work is that the cross-linking will suffer from the same CES limitations and therefore upcoming CMB surveys will unavoidably have poorly cross-linked regions if they use CESs, regardless of detailed scheduling choices. Our results are also relevant for non-CMB surveys that perform constant elevation scans and may have scan-coupled systematics, such as intensity mapping surveys.
description: Narrative adjusted to make scope of paper and results clearer; version published in the Open Journal of Astrophysics
Hunting for exoplanets via star-planet interactions
Creators: name: Kavanagh, Robert D
Publisher: name: Zenodo
Year: 2024

description: Low-mass stars host the bulk of all exoplanets in our galaxy. While the population of exoplanets discovered to date is dominated by those that are close-in, massive, and transit, such a population is not representative of the complete sample. M dwarfs, which are the most common type of star in the galaxy, are expected to favour hosting small rocky planets. Finding such planets however is very difficult through traditional methods, as their signatures are very weak, and can be drowned out by stellar activity. M dwarfs also harbour strong surface magnetic fields, which dominate the energetics of the surrounding plasma environment out to large distances. In this region, the motion of a planet through the star's large-scale magnetic field can produce Alfvén waves, which carry energy back to the star. Such a scenario is expected to power bright radio emission from the star via the electron cyclotron maser (ECM) instability. Due to the beamed nature of ECM emission, such signatures could be more favourable for detection from exoplanetary systems with architectures distinct from the currently known population. Here, I present our recent work utilising numerical models to identify the most favourable systems for detecting these signatures based on the characteristics of the star and planetary orbit.
On the unsteady dynamics of partially shrouded compressible jets
Creators: name: Nanda, Soumya R.
name: Karthick, S. K.
name: Krishna, T. V.
name: De, A.
name: Ibrahim, S. Mohammed
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We experimentally investigate a partially shrouded sonic jet (a sonic free-jet shielded by a solid wall-extension on one side) exiting from a planar nozzle at two different nozzle pressure ratio ($ζ=4$ and $5$). We experimentally show that the inherent jet unsteadiness from the shock-induced flow separation on the wall and the emitted noise in the far-field is strongly coupled through a series of experiments like high-speed schlieren, wall-static pressure, unsteady pressure spectra, and microphone measurements. The partially shrouded jet's lateral free expansion is also identified to be complicated, three-dimensional, and the produced noise is directional. The emitted acoustic pulses from the flapping-jet, the radiated noise from the shock-induced separation on the wall, and the shock-shear layer interaction on the other side of the wall are responsible for the generated acoustic disturbances. The non-uniform aeroacoustic forcing on the top and bottom portion of the partially wall-bounded jet shear layer leads to a self-sustained jet oscillation and a discrete sound emission. The vital features are identified through the proper orthogonal decomposition of high-speed schlieren images and supplemented by other measurements.
description: 14 pages, 8 figures, contains 3 videos, article accepted in 'Experiments in Fluids' on September 20, 2021
Data repository of "Plume-induced intra-oceanic subduction infancy in ancient orogen: example from Western Kunlun"
Creators: name: Tan, Zhou
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 370503
subject: Igneous and metamorphic petrology

description: It includes all supplementary figures 1-16 (in supplementary information file) and tables 1-8.
Density fluctuations in the presence of spinodal instabilities
Creators: name: Sasaki, C.
name: Friman, B.
name: Redlich, K.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Density fluctuations resulting from spinodal decomposition in a non-equilibrium first-order chiral phase transition are explored. We show that such instabilities generate divergent fluctuations of conserved charges along the isothermal spinodal lines appearing in the coexistence region. Thus, divergent density fluctuations could be a signal not only for the critical end point but also for the first order phase transition expected in strongly interacting matter. We also compute the mean-field critical exponent at the spinodal lines. Our analysis is performed in the mean-field approximation to the NJL model formulated at finite temperature and density. However, our main conclusions are expected to be generic and model independent.
description: 4 pages, 3 figures; final version to appear in Physical Review Letters
FZZ Algebra
Creators: name: Mukherjee, Anindya
name: Mukhi, Sunil
name: Pakman, Ari
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The duality between the Sine-Liouville conformal field theory and the two dimensional black hole is revisited by considering the two possible Sine-Liouville dressings together. We show that this choice is consistent with the structure of correlation functions, and that the OPE of the two dressings yields the black hole deformation operator. As an application of this approach, we investigate the role of higher winding perturbations in the context of c=1 strings, where we argue that they are related to higher-spin discrete states that generalize the 2d black hole operator.
description: 23 pages, JHEP style. v2: small modifications to better clarify some of the arguments
Black brane evaporation through D-brane bubble nucleation
Creators: name: Henriksson, Oscar
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the process of black brane evaporation through the emission of D-branes. Gravitational solutions describing black branes in asymptotically anti-de Sitter spacetimes, which are holographically dual to field theory states at finite temperature and density, have previously been found to exhibit an instability due to brane nucleation. Working in the setting of D3-branes on the conifold, we construct static Euclidean solutions describing this nucleation to leading order - D3-branes bubbling off the horizon. Furthermore, we analyze the late-time dynamics of such a D3-brane bubble as it expands and find a steady-state solution including the wall profile and its speed.
description: 5 pages, 2 figures. v2: Some streamlining of computations and discussion, slight change in interpretation of results on wall profile, matches published version
Mechanics of complex bodies: commentary on the unified modelling of material substructures
Creators: name: Mariano, Paolo Maria
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 74A30; 76A99

description: Basic issues of the general model-building framework of the mechanics of complex bodies are discussed. Attention is focused on the representation of the material elements, the conditions for the existence of ground states in conservative setting and the interpretation of the nature of the various balance laws occurring.
description: 14 pages, in print on Theoretical and Applied Mechanics, 2008
Detection of mass ejection from a superflare on a solar-type star
Creators: name: Namekata, Kosuke
name: Maehara, Hiroyuki
name: Honda, Satoshi
name: Notsu, Yuta
name: Okamoto, Soshi
name: Takahashi, Jun
name: Takayama, Masaki
name: Ohshima, Tomohito
name: Saito, Tomoki
name: Katoh, Noriyuki
name: Tozuka, Miyako
name: Murata, Katsuhiro
name: Ogawa, Futa
name: Niwano, Masafumi
name: Adachi, Ryo
name: Oeda, Motoki
name: Shiraishi, Kazuki
name: Isogai, Keisuke
name: Ishii, Takako
name: Ichimoto, Kiyoshi
name: Nogami, Daisaku
name: Shibata, Kazunari
Publisher: name: Zenodo
Year: 2021
Subjects: Cool Stars on the main sequence
superflares on solar-type stars
stellar mass ejection

description: Solar and stellar flares are caused by the sudden release of magnetic energy on the surfaces. In the case of the Sun, mass ejections often accompany solar flares and affect the Earth’s environment. Active solar-type stars (G-type main-sequence stars) sometimes show larger `superflares' (Maehara et al. 2012) that may cause more huge mass ejections than those of solar flares. The stellar mass ejections can greatly affect the exoplanet habitability and the stellar mass evolution (e.g. Airapetian et al. 2020). However, no observational indication of mass ejection has been reported especially for solar-type stars. We conducted spectroscopic monitoring observations of the active young solar analog EK Dra (a famous zero-age main-sequence G-dwarf) by our new 3.8-m Seimei telescope, simultaneously with TESS photometry. Our time-resolved optical spectroscopic observation shows clear evidence for a stellar mass ejection associated with a superflare on the solar-type star (Namekata et al. submitted). After the superflare brightening with the radiated energy of 2.0×1033 erg observed by TESS, a blue-shifted H-alpha absorption component with a velocity of -510 km s-1 appeared. The velocity gradually decayed in 2 hours and the deceleration 0.34 km s-2 was consistent with the surface gravity on EK Dra (0.30 ± 0.05 km s-2). The temporal changes in the spectra greatly resemble that of a solar mass ejection observed by the SMART telescope at Hida observatory. Moreover, the ejected mass of 1.1×1018 g roughly corresponds to those predicted from solar flare-energy/ejected-mass relation. These discoveries imply that a huge stellar mass ejection occurs possibly in the same way as solar ones. Our high-quality dataset can be helpful for future studies to estimate its impacts on the young-planet atmosphere around young solar-type stars as well as stellar mass/angular momentum evolution.
The asmatic troparia, katavasiai, and hypakoai "cycles" in their Paleoslavonic recensions: a study in comparative paleography
Creators: name: Myers, Gregory Arthur
Publisher: name: University of British Columbia
Year: 2009

description: This study concerns the repertory and musical notation of the medieval Russian Kondakar. Five such documents survive from the eleventh to the thirteenth centuries and contain a mixed body of melismatic chants for the office and liturgy. All are notated in an archaic yet highly complex musical notation set in two rows above, the text: a small row of intervallic and rhythmic signs overlaid by a row of Great Hypostases. The texts are also distorted by the addition non-textual intercalations. For the first time the full collection of kondakars has become available for study and comparative analysis. The transcription of this notation remained elusive until the discovery of the kondakar’s relationship to the Byzantine Asmatikon or choir book which shares much the same repertory and melodic style with the kondakar. Further support to the Kondakar Asmatikon relationship was found with the discovery of the Kastoria 8 manuscript, an Asmatikon whose notational properties recall those of the kondakar. Through a type of comparative analysis or “counterpart transcription” pioneered independently by Kenneth Levy and Constantin Floros, much has been learned about the nature of kondakarian chants and notation. This study constitutes a rigorous application and test of their methods with the aim of expanding the repertory of the known kondakarian signs. The hymn types known as troparia and stichoi, katavasiai, and hypakoai have been drawn from the Forefeast, Christmas, and Epiphany liturgical cycles and subjected to extensive analyses with the aim of expanding the known repertory of kondakarian signs. The chants are presented and studied within the context of the liturgical cycle and subjected to analyses on different structural levels. The study also takes into consideration historical factors and the role of the liturgical ordines in use in Rus’ in the Kievan period. The result has been an affirmation of the method’s effectiveness, an increased repertory of known kondakarian signs, and an advancement in our own knowledge of the kondakarian system. Fifteen melodic formula-complexes have been identified within the contexts of the chants analyzed. These are presented in a statistical concordance whose aim is to summarise by formula the cyclic and inter-hymnodic relationships among theses hymns. In light of this new knowledge and expanded notational vocabulary, we may now turn to that kondakarian repertory for which there is no known asmatic counterpart and therefore no Byzantine control, i.e., the kontakia, with the hope of achieving effective musical reconstructions of this vast chant body. Moreover, this study has served to illustrate the medieval Russian adaptors’ assimilation and mastery of the centonate procedure of chant construction and their degree of musical literacy, which was developed to satisfy specific musical and liturgical needs in the rarefied cultural atmosphere of Kievan Rus’.
Characterizing cool giants in symbiotic binaries using the Gaia EDR3 data
Creators: name: Merc, Jaroslav
name: Gális, Rudolf
name: Wolf, Marek
Publisher: name: Zenodo
Year: 2021
Subjects: Post main sequence cool stars
Symbiotic stars
Interacting binaries
Gaia EDR3
Catalog
Database

description: Symbiotic stars are interacting binaries consisting of an evolved, cool giant that is transferring mass to a hot companion - a white dwarf or rarely a neutron star. The presence of both ionized and neutral regions in their surroundings, interacting winds, jets, accretion disks, or dust forming regions make them extraordinary astrophysical laboratories for studying various aspects of interaction and evolution in binary systems. Although recent surveys discovered several dozens of new symbiotic variables, their careful analysis and deriving the parameters of the components of these systems are needed in order to understand the mechanisms of their interactions and evolution. Our New Online Database of Symbiotic Variables can serve as a basis for statistical studies of the characteristics of the symbiotic population. As presented in this contribution, Gaia observations made public in the Gaia EDR3 and impatiently awaited in subsequent releases could be very suitable for this purpose considering the Gaia satellite can provide data obtained uniformly for the entire sample.
description: {"references": ["Gaia Collaboration et al. (2020). arXiv:2012.01533", "Lindegren, L., Bastian, U., Biermann, M., Bombrun A., de Torres, A. et al. (2020). arXiv:2012.01742", "Merc, J., G\u00e1lis, R., & Wolf, M. (2019), Research Notes of the American Astronomical Society, 3, 28.", "Merc, J., G\u00e1lis, R., & Wolf, M. (2020), Contributions of the Astronomical Observatory Skalnate Pleso, 50, 426.", "Merc, J., Miko\u0142ajewska, J., Gromadzki, M., Ga\u0142an, C., I\u0142kiewicz, K., et al. (2020). Astronomy & Astrophysics, 644, A49.", "Miko\u0142ajewska, J. (2012), Baltic Astronomy, 21, 5.", "Sion, E. M., Godon, P., Mikolajewska, J., & Katynski, M. (2019), The Astrophysical Journal, 874, 178.", "Teyssier, F. (2019), Contributions of the Astronomical Observatory Skalnate Pleso, 49, 217."]}
Ποιότητα ζωής ατόμων με νοητική ανεπάρκεια:
Creators: name: Γκαγκαλνά, Αναστασία Αθανασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2013
Subjects: Νοητική ανεπάρκεια/καθυστέρηση
Ποιότητα ζωής
Mental retardation
Quality of life

description: Η παρακάτω έρευνα επικεντρώνεται στην ποιότητα ζωής ατόμων με νοητική καθυστέρηση (ν.κ.) που ζουν με τις οικογένειές τους. Ένα θέμα που απασχόλησε πολλές επιστημονικές κοινότητες τις τελευταίες δεκαετίες και κυρίως αυτούς που ασχολούνται ή έχουν παιδιά με ν.κ.. Στην Ελλάδα οι έρευνες με σχετικό θέμα είναι ελάχιστες με αποτέλεσμα να μην έχουμε συγκεκριμένη εικόνα για το πως ζουν και φέρονται τα άτομα με ν.κ.. μετά τη σχολική τους ζωή ως ενήλικες. Σε αυτήν την εργασία προσπαθήσαμε να ερευνήσουμε και να καταγράψουμε την ποιότητα ζωής ατόμων με ν.κ.. στα δύο μεγαλύτερα αστικά κέντρα της Ελλάδας, τα οποία είναι η Αθήνα και η Θεσσαλονίκη. Η έρευνα αυτή έγινε με βάση τους 8 τομείς του Schalock οι οποίοι πραγματεύονται τη συναισθηματική ποιότητα, τις διαπροσωπικές σχέσεις, την υλική ποιότητα ζωής, την προσωπική εξέλιξη, τη σωματική ποιότητα ζωής, τον αυτο-προσδιορισμό, την κοινωνική ένταξη και τα δικαιώματα των ατόμων αυτών. Τα στοιχεία που συγκεντρώθηκαν και η επεξεργασία τους μπόρεσαν να μας δώσουν μια πρώτη εικόνα για την ποιότητα ζωής των ατόμων αυτών. Η εικόνα αυτή μπόρεσε να μας οδηγήσει σε συμπεράσματα που θα αναλυθούν στα επόμενα κεφάλαια.
description: The following research focuses on the quality of life of people with mental retardation (m.r.) living with their families. Over the last decades many scientific communities focused on this field and especially those who working or living with people with mental retardation. In Greece the investigations that related to these issues are so few that there is not a specific view of how people with m.r. live after their school lives as adults. In this research we tried to investigate and record the quality of life of people with m.r. at two largest cities in Greece, which are Athens and Thessaloniki. This survey was based on 8 areas of Schalock that deal with the emotional quality, interpersonal relationships, physical quality of life, personal development, physical quality of life, self-determination, social inclusion and the rights of these individuals . The data gathered and processed could give us a first impression of the quality of life of these individuals. This picture could lead us to conclusions that will be analyzed in the following chapters.
One Size Does Not Fit All: Finding the Optimal Subword Sizes for FastText Models across Languages
Creators: name: Novotný, Vít
name: Ayetiran, Eniafe Festus
name: Bačovský, Dalibor
name: Lupták, Dávid
name: Štefánik, Michal
name: Sojka, Petr
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences
subject: I.2.7
subject: 68T50

description: Unsupervised representation learning of words from large multilingual corpora is useful for downstream tasks such as word sense disambiguation, semantic text similarity, and information retrieval. The representation precision of log-bilinear fastText models is mostly due to their use of subword information. In previous work, the optimization of fastText's subword sizes has not been fully explored, and non-English fastText models were trained using subword sizes optimized for English and German word analogy tasks. In our work, we find the optimal subword sizes on the English, German, Czech, Italian, Spanish, French, Hindi, Turkish, and Russian word analogy tasks. We then propose a simple n-gram coverage model and we show that it predicts better-than-default subword sizes on the Spanish, French, Hindi, Turkish, and Russian word analogy tasks. We show that the optimization of fastText's subword sizes matters and results in a 14% improvement on the Czech word analogy task. We also show that expensive parameter optimization can be replaced by a simple n-gram coverage model that consistently improves the accuracy of fastText models on the word analogy tasks by up to 3% compared to the default subword sizes, and that it is within 1% accuracy of the optimal subword sizes.
Η επίδραση των νέων τεχνολογιών στην επισκεψιμότητα των μουσείων
Creators: name: Χλιούρα, Αννα Αχιλλέα
Publisher: name: Aristotle University of Thessaloniki
Year: 2013
Subjects: εργαλεία διαδικτυακού μάρκετινγκ
κοινωνικά δίκτυα
μουσεία
web marketing tools
social media
museums

description: Η παρούσα διπλωματική εργασία, στο πρώτο της μέρος, διερεύνησε τη βιβλιογραφία σχετικά με τα ζητήματα του διαδικτυακού μάρκετινγκ και των νέων τεχνολογιών στη διαχείριση των μουσείων. Εν συνεχεία, στο δεύτερο μέρος της, μελέτησε τα εργαλεία του διαδικτυακού μάρκετινγκ που κάνουν χρήση τα μουσεία της Θεσσαλονίκης και παρουσίασε μία έρευνα κοινού, η οποία εξετάζει ποια εργαλεία του διαδικτυακού μάρκετινγκ χρησιμοποιεί το κοινό για να μεταβεί στα μουσεία, με ποιο τρόπο αυτά τα εργαλεία επηρεάζουν το κοινό και τελικά, ποιο είναι το προφίλ των ατόμων που δέχονται τη σφαίρα επιρροής των νέων τεχνολογιών για τις μουσειακές τους επισκέψεις.
description: This thesis, in its first part, studied the literature on the issues of online marketing and new technologies in the management of museums. Subsequently, in the second part, examined the tools of online marketing that Thessaloniki's museums used and presented a survey, that saw which online marketing tools are used by the public for going to museums, how these tools affect the public and finally, which is the profile of the people who accept the realm of new technologies for their museum visits.
Quantum-Cosmological Corrections to Black Hole Entropy A New Approach to Regularizing Singularities and Information Storage
Creators: name: del Amo Castillo, Iñaki
Publisher: name: Zenodo
Year: 2024
Subjects: subject: Black holes
subject: Quantum cosmology
subject: Entropy
subject: Singularities
subject: Soft hair
subject: Holography
subject: Information storage
subject: Quantum corrections

description: This preprint presents a novel quantum-cosmological equation that introduces quantum corrections to the classical Schwarzschild metric. These corrections are aimed at regularizing singularities within black holes while simultaneously impacting their entropy and information storage capacity. Building upon recent developments, particularly those related to Andrew Strominger's soft hair and holography theories, this work addresses the black hole information paradox. Preliminary calculations indicate that even black holes with minimal energy, such as those with 12 joules, can retain significant amounts of information due to quantum corrections, which modify the horizon structure and regularize singularities.

This research opens up new avenues for understanding black hole thermodynamics and quantum gravity, providing a fresh perspective on the relationship between quantum mechanics and general relativity. The community is invited to explore these findings and contribute to further discussions on the role of quantum corrections in black hole entropy and the storage of information.
M dwarfs can have Earth-like fluxes of Galactic cosmic rays in their habitable zones
Creators: name: Mesquita, Amanda
name: Rodgers-Lee, Donna
name: Vidotto, Aline
Publisher: name: Zenodo
Year: 2021
Subjects: Cool Stars on the main sequence

description: The propagation of Galactic cosmic rays is well studied in the context of the Sun but it is poorly known in the context of M dwarfs. Quantifying the flux of cosmic rays reaching exoplanets is essential since they are important in the context of life. Here, we investigate the modulation of Galactic cosmic rays as they travel through the astrosphere of six M dwarfs. We perform simulations using a combined 1D cosmic ray transport model and 1D MHD stellar wind model. We found that, three M dwarfs in our sample have Galactic cosmic rays fluxes comparable with Earth’s around their much closer-in habitable zones. Most of the known exoplanets in our sample have a significantly lower flux of Galactic cosmic rays than values observed at the Earth. This includes GJ 273b which is the only known planet orbiting the habitable zone of its host star.
Quantum-Cosmological Corrections to Black Hole Entropy A New Approach to Regularizing Singularities and Information Storage
Creators: name: DEL AMO, IÑAKI
Publisher: name: Zenodo
Year: 2024
Subjects: subject: Black holes
subject: Quantum cosmology
subject: Entropy
subject: Singularities
subject: Soft hair
subject: Holography
subject: Information storage
subject: Quantum corrections

description: This preprint presents a novel quantum-cosmological equation that introduces quantum corrections to the classical Schwarzschild metric. These corrections are aimed at regularizing singularities within black holes while simultaneously impacting their entropy and information storage capacity. Building upon recent developments, particularly those related to Andrew Strominger's soft hair and holography theories, this work addresses the black hole information paradox. Preliminary calculations indicate that even black holes with minimal energy, such as those with 12 joules, can retain significant amounts of information due to quantum corrections, which modify the horizon structure and regularize singularities.

This research opens up new avenues for understanding black hole thermodynamics and quantum gravity, providing a fresh perspective on the relationship between quantum mechanics and general relativity. The community is invited to explore these findings and contribute to further discussions on the role of quantum corrections in black hole entropy and the storage of information.
Synthesis of novel benzimidazole containing antimicrobial peptides (AMPs) with significant inhibitory effect on multidrug resistant strain of Salmonella typhimurium
Creators: name: Aamra, Husena
name: Khan, Farooq-Ahmad
name: Jahan, Humera
name: Zafar, Munira
name: Ali, Hunain
name: Shaheen, Farzana
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Space Science
subject: Microbiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: 60506 Virology

description: Multiple drug resistance (MDR) of bacterial infections is a serious public health concern, since the currently available antibiotics are less effective and nonspecific. Antimicrobial peptides (AMPs) are promising alternative to the conventional antibiotics, as they can easily interact with bacterial peptidoglycan (PGN) through penetration or dissolving the biofilms with minimal side-effects. Herein, we report a simple and scalable method for the synthesis of benzimidazole containing peptides, with significant inhibitory effect by compound 3 (IC50 = 37 ± 1.9 µM) on multidrug resistant strain of Salmonella typhimurium.
Fomin's conception of quantum cosmogenesis
Creators: name: Szydlowski, Marek
name: Golbiak, Jacek
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The main aim of this paper is to extend the early approach to quantum cosmogenesis provided by Fomin. His approach was developed independently to the well-known Tryon description of the creation of the closed universe as a process of quantum fluctuation of vacuum. We apply the Fomin concept to derive the cosmological observables. We argue that Fomin's idea from his 1973 work, in contrast to Tryon's one has impact on the current Universe models and the proposed extension of his theory now can be tested by distant supernovae SNIa. Fomin's idea of the creation of the Universe is based on the intersection of two fundamental theories: general relativity and quantum field theory with the contemporary cosmological models with dark energy. As a result of comparison with contemporary approaches concerning dark energy, we found out that Fomin's idea appears in the context of the present acceleration of the Universe explanation: cosmological models with decaying vacuum. Contemporary it appears in the form of Ricci scalar dark energy connected with the holographic principle. We show also that the Fomin model admits the bounce instead of the initial singularity. We demonstrate that the Fomin model of cosmogenesis can be falsified and using SNIa data the values of model parameters is in agreement with observations.
description: 12 pages, 4 figures; (v2) 22 pages, references added, figures improved; (v3) rewritten using revtex4; (v4) minor changes; (v5) improved formulas and extended statistical analysis
Additional file 2 of Gastrointestinal symptoms of long COVID-19 related to the ectopic colonization of specific bacteria that move between the upper and lower alimentary tract and alterations in serum metabolites
Creators: name: Zhang, Deyu
name: Weng, Siyuan
name: Xia, Chuanchao
name: Ren, Yuqing
name: Liu, Zaoqu
name: Xu, Yudi
name: Yang, Xiaoli
name: Wu, Ruhao
name: Peng, Lisi
name: Sun, Liqi
name: Zhu, Jiaqi
name: Liang, Xuesong
name: Jia, Yin
name: Wang, Huaizhou
name: Chen, Qian
name: Liu, Dongtian
name: Chen, Yi
name: Guo, Honglei
name: Han, Xinwei
name: Jin, Zhendong
name: Chen, Cui
name: Yang, Xia
name: Li, Zhaoshen
name: Huang, Haojie
Publisher: name: figshare
Year: 2023
Subjects: subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: Cancer
subject: Virology

description: Additional file 2: Table S1. Clinical characteristics of the enrolled patients for serum UPLC-MS/MS-based widely targeted metabolomics.
Radio signatures from encounters between Neutron Stars and QCD-Axion Minihalos around Primordial Black Holes
Creators: name: Nurmi, Sami
name: Schiappacasse, Enrico D.
name: Yanagida, Tsutomu T.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Probing the QCD axion dark matter (DM) hypothesis is extremely challenging as the axion interacts very weakly with Standard Model particles. We propose a new avenue to test the QCD axion DM via transient radio signatures coming from encounters between neutron stars (NSs) and axion minihalos around primordial black holes (PBHs). We consider a general QCD axion scenario in which the PQ symmetry breaking occurs before (or during) inflation coexisting with a small fraction of DM in the form of PBHs. The PBHs will unavoidably acquire around them axion minihalos with the typical length scale of parsecs. The axion density in the minihalos may be much higher than the local DM density, and the presence of these compact objects in the Milky Way today provides a novel chance for testing the axion DM hypothesis. We study the evolution of the minihalo mass distribution in the Galaxy accounting for tidal forces and estimate the encounter rate between NSs and the dressed PBHs. We find that the encounters give rise to transient line-like emission of radio frequency photons produced by the resonant axion-photon conversion in the NS magnetosphere and the characteristic signal could be detectable with the sensitivity of current and prospective radio telescopes. It would be important to investigate in detail search strategies for such signals which would provide a novel pathway for QCD axion detection.
description: 32 pages, 9 figures. V2: Further discussion on detectability. Updated towards version published in JCAP
Traditional Zardosi Embroidery in the Design and Development of Custom Wall Decor
Creators: name: B, Subathra
Publisher: name: Zenodo
Year: 2024
Subjects: craft, zardosi, aari embroidery, wall decor

description: A fresh attempt at creating the zardosi wall hanging was created using the appropriate fabric, and its appearance, cost, and client acceptability will all be favorable. In contrast to the clothing, the item was reasonably priced and looked good hanging on the wall. Therefore, the majority of clients might be drawn to it.
Solvent-free synthesis of 14-aryl-14H-dibenzo[a-j]xanthenes using Fe3O4@Al2O3@SiO2@Fe2O3 as a green catalyst
Creators: name: Darya, Naghmeh
name: Tajik, Hassan
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Biochemistry
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Medicine
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 60506 Virology
subject: FOS: Biological sciences

description: We report, a novel, green, nano-sized particles as a sandwich nano-capsule multilayer catalyst (SNC@MC) [Fe3O4@Al2O3@SiO2@Fe2O3] for the efficacious one-pot synthesis of 14-aryl-14H- dibenzo[a-j]xanthenes in high yields, under mild and solvent-free conditions at room temperature. The catalyst structure characterized by using various analytical techniques such as SEM, EDS, FT-IR, thermogravimetric analysis (TGA) and UV-visible spectroscopy. Environmentally friendly, availability, high catalytic activity, high efficiency, mild reaction conditions and ease of separation are the main reasons in using this green sandwich nano-capsule multilayer catalyst.
Star formation in the Vela Molecular Ridge. Large scale mapping of cloud D in the mm continuum
Creators: name: Massi, F.
name: De Luca, M.
name: Elia, D.
name: Giannini, T.
name: Lorenzetti, D.
name: Nisini, B.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The Vela Molecular Ridge is one of the nearest intermediate-mass star forming regions, located within the galactic plane and outside the solar circle. Cloud D, in particular, hosts a number of small embedded young clusters. We present the results of a large-scale map in the dust continuum at 1.2 mm of a ~ 1deg x 1deg area within cloud D. The main aim of the observations was to obtain a complete census of cluster-forming cores and isolated (both high- and low-mass) young stellar objects in early evolutionary phases. The bolometer array SIMBA at SEST was used to map the dust emission in the region with a typical sensitivity of ~ 20 mJy/beam. This allows a mass sensitivity of ~ 0.2 Msun. The resolution is 24 arcsec, corresponding to ~ 0.08 pc, roughly the radius of a typical young embedded cluster in the region. The continuum map is also compared to a large scale map of CO(1-0) integrated emission. Using the CLUMPFIND algorithm, a robust sample of 29 cores has been obtained, spanning the size range 0.03 - 0.25 pc and the mass range 0.4 - 88 Msun. The most massive cores are associated both with red IRAS sources and with embedded young clusters, and coincide with CO(1-0) integrated emission peaks. The cores are distributed according to a mass spectrum ~ M^{-alpha} and a mass-versus-size relation ~ D^{x}, with alpha ~ 1.45 - 1.9 and x ~ 1.1 - 1.7. They appear to originate in the fragmentation of gas filaments seen in CO(1-0) emission and their formation is probably induced by expanding shells of gas. The core mass spectrum is flatter than the Initial Mass Function of the associated clusters in the same mass range, suggesting further fragmentation within the most massive cores. A threshold A_V ~ 12 mag seems to be required for the onset of star formation in the gas.
description: 13 pages, 11 figures, to be published in Astronomy and Astrophysics
Molecular studies of the structure and function of pseudomonas aeruginosa OprD: an imipenem specific porin
Creators: name: Huang, Hongjin
Publisher: name: University of British Columbia
Year: 2009

description: Pseudomonas aeruginosa OprD is a specific porin which facilitates the uptake of basic amino acids and imipenem, a carbapenem antibiotic with high potency against P. aeruginosa. To permit further studies of OprD, the oprD structural gene was cloned and expressed in Escherichia coli on a 2.1-kb BamHI/KpnI fragment. DNA sequencing predicted a 420 amino acid mature OprD protein with a 23 amino acid signal peptide. In addition, a putative oprD regulatory gene opdE was sequenced, which predicted a hydrophobic protein of 402 amino acids. A set of P. aeruginosa isogenic strains with genetically defined levels of OprD were constructed and utilized to characterize the in vivo function of OprD. The results clearly demonstrated that OprD could be utilized by imipenem and meropenem but, even when substantially overexpressed, could not be significantly utilized by other ß-lactams, quinolones or aminoglycosides. Regarding its function in uptake of nutrients, OprD selectively facilitated the diffusion of basic amino acids and gluconate under growth-rate limiting conditions. Competition experiments confirmed that imipenem shared common binding sites with basic amino acids in the OprD channel, but not with gluconate or glucose. In vitro functional studies using purified OprD provided direct evidence for the presence of a specific binding site(s) for imipenem in the OprD channel, with an I₅₀ value of 1.4 µM. An OprD topology model was proposed based on sequence alignment with E. coli porin OmpF and structure predictions. Sixteen ß-strands were predicted, connected by short turns at the periplasmic side, whereas the eight external loops were of variable length but tended to be much longer. In addition, multiple sequence alignments between OprD and seven representatives from the porin superfamily indicated that OprD was the first specific porin that could be aligned with members of the so-called porin superfamily. PCR-based site directed mutagenesis was performed to separately delete short stretches (4-8) of amino acid residues from each of the predicted external loops. Six out of eight mutants expressed in both E. coli and P. aeruginosa, maintained substantial resistance to trypsin treatment in the context of outer membranes, and formed functional channels, which supported the general accuracy of the model. The loop 2 deletion mutant only partially reconstituted sup ersusceptibility to imipenem in an OprD defective background, and showed much lower affinity to imipenem in the macroscopic conductance inhibition experiment, indicating its involvement in iniipenem binding. Deletions in loops 5, 7 or 8 resulted in a channel with enhanced permeability to antibiotics, but which retained the imipenem binding site(s). A model of the channel architecture of OprD was constructed based on these data, and the mechanism by which imipenem and basic amino acids pass through the OprD channel was discussed.
Covariant Decomposition of The Non-Linear Galaxy Number Counts and Their Monopole
Creators: name: Ginat, Yonadav Barry
name: Desjacques, Vincent
name: Jeong, Donghui
name: Schmidt, Fabian
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We present a fully non-linear and relativistically covariant expression for the observed galaxy density contrast. Building on a null tetrad tailored to the cosmological observer's past light cone, we find a decomposition of the non-linear galaxy over-density into manifestly gauge-invariant quantities, each of which has a clear physical interpretation as a cosmological observable. This ensures that the monopole of the galaxy over-density field (the mean galaxy density as a function of observed redshift) is properly accounted for. We anticipate that this decomposition will be useful for future work on non-linearities in galaxy number counts, for example, deriving the relativistic expression for the galaxy bispectrum. We then specialise our results to conformal Newtonian gauge, with a Hubble parameter either defined globally or measured locally, illustrating the significance of the different contributions to the observed monopole of the galaxy density.
description: (v1) Comments welcome. (v2) Updated to agree with version accepted to JCAP; typos fixed
Hydrodynamics of noncircular vortices in beams of light and other two-dimensional fluids
Creators: name: Andersen, Jasmine M.
name: Voitiv, Andrew A.
name: Siemens, Mark E.
name: Lusk, Mark T.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The motion of noncircular two-dimensional vortices is shown to depend on a form of coupling between vortex ellipticity and the gradient of fluid density. The approach is based on the perspective that an elliptic vortex can be described as the projection of a virtual construct, a circular vortex with a symmetry axis that is tilted with respect to the direction of propagation. The resulting kinetic equation offers insights into how tilt and vortex velocity coevolve in few-body nonequilibrium settings such as vortex pair nucleation and annihilation. The model is developed and applied in association with optical vortices, and optical experiments are used to verify its predictive power. It is valid for quantum fluids and classical hydrodynamics settings as well.
A mild and selective Cu(II) salts-catalyzed reduction of nitro, azo, azoxy, N-aryl hydroxylamine, nitroso, acid halide, ester, and azide compounds using hydrogen surrogacy of sodium borohydride
Creators: name: Kalola, Anirudhdha G.
name: Prasad, Pratibha
name: Mokariya, Jaydeep A.
name: Patel, Manish P.
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Biochemistry
subject: Pharmacology
subject: Biotechnology
subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified

description: The first mild, in situ, single-pot, high-yielding well-screened copper (II) salt-based catalyst system utilizing the hydrogen surrogacy of sodium borohydride for selective hydrogenation of a broad range of nitro substrates into the corresponding amine under habitancy of water or methanol like green solvents have been described. Moreover, this catalytic system can also activate various functional groups for hydride reduction within prompted time, with low catalyst-loading, without any requirement of high pressure or molecular hydrogen supply. Notably, this system explores a great potential to substitute expensive traditional hydrogenation methodologies and thus offers a greener and simple hydrogenative strategy in the field of organic synthesis.
Effects of Ghrelin on metabolic activity of equine cartilage affected with inflammatory degeneration: preliminary isolation, characterization of equine cultured chondrocytes and assessment of LPS-induced inflammatory stress.
Creators: name: Ceriotti, Serena
name: Lange Consiglio, Anna
name: Casati, Lavinia
name: Cremonesi, Fausto
name: Zucca, Enrica
name: Sibilia, Valeria
name: Ferrucci, Francesco
Publisher: name: Department of Health, Animal Science and Food Safety (VESPA)
Year: 2015
Subjects: equine; chondrocytes; inflammatory stress

description: Ghrelin, the natural ligand for GH secretagogue receptors, influences the activity of both human and rat joint chondrocytes, modulating the synthesis of eicosanoids in the cartilage1. This project aims to assess the possible protective effects of Ghrelin on equine cultured chondrocytes exposed to lipopolysaccharide (LPS), as a model of osteoarthritic joint. In the preliminary step of our study, we have characterized equine chondrocyte primary cell cultures and standardized the detrimental effects LPS on chondrocytes health. Equine articular cartilage was collected with aseptic procedure and equine chondrocytes were isolated by overnight incubation. Cells were cultured in monolayer culture to obtain third-passage (P3) chondrocytes and specific cartilaginous genes were identified by qualitative PCR. P3 chondrocytes were treated with increasing LPS concentrations (1-100 ng/ml) and the effects of LPS were assessed with the apoptosis-induction test and fluorescence microscopy after 1, 3, 6, 12, 24, 48 h of treatment. PCR evidenced type II collagenases and aggrecan expression in isolated cells confirming the isolation of chondrocytes. Healthy chondrocytes (HC) showed no fluorescence, necrotic chondrocytes (NC) red fluorescence, early apoptotic chondrocytes (EAC) green fluorescence and advanced apoptotic chondrocytes (AAC) mixed green-red fluorescence. In LPS-stimulated chondrocytes, there was a trend throughout an increased percentage of AAC that became equal to or overwhelmed the percentage of HC after 3 hours for all LPS treatments and lasted for 6 hours after the highest LPS concentration used. On the basis of these results, the concentration of LPS 100 ng/ml for 6 h will be used for subsequent experiments.
description: International Journal of Health, Animal Science and Food Safety, Vol 2, No 1s (2015): Proceeding of Veterinary and Animal Science Days