cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Perturbative quantum field theory in the framework of the fermionic projector
Creators: name: Finster, Felix
Publisher: name: Universität Regensburg
Year: 2013
Subjects: subject: 510 Mathematik

description: We give a microscopic derivation of perturbative quantum field theory, taking causal fermion systems and the framework of the fermionic projector as the starting point. The resulting quantum field theory agrees with standard quantum field theory on the tree level and reproduces all bosonic loop diagrams. The fermion loops are described in a different formalism in which no ultraviolet divergences occur.
Estudios sobre inducción a la maduración de Penaeus stylirostris en invierno, mediante enucleación del pedúnculo ocular durante el periodo posecdisis /
Creators: name: Carreño Gonzalez, Silvia
Publisher: name: Universidad Autónoma de Baja California.
Year: 2022
Subjects: subject: SH380.6 C37 1992

description: Se efectuaron pruebas de inducción al desarrollo ovárico de camarón azul Panaeus stylirostris en el periodo septiembre de 1987 a enero de 1988.
Unveiling photon-photon coupling induced transparency and absorption
Creators: name: Shrivastava, Kuldeep Kumar
name: Sahu, Ansuman
name: Bhoi, Biswanath
name: Singh, Rajeev
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: This study presents the theoretical foundations of an analogous electromagnetically induced transparency (EIT) and absorption (EIA) which we are referring as coupling induced transparency (CIT) and absorption (CIA) respectively, along with an exploration of the transition between these phenomena. We provide a concise phenomenological description with analytical expressions for transmission spectra and dispersion elucidating how the interplay of coherent and dissipative interactions in a coupled system results in the emergence of level repulsion and attraction, corresponding to CIT and CIA, respectively. The model is validated through numerical simulations using a hybrid system comprising a split ring resonator (SRR) and electric inductive-capacitive (ELC) resonator in planar geometry. We analyse two cases while keeping ELC parameters constant; one involving a dynamic adjustment of the SRR size with a fixed split gap, and the other entailing a varying gap while maintaining a constant SRR size. Notably, in the first case, the dispersion profile of the transmission signal demonstrates level repulsion, while the second case results in level attraction, effectively showcasing CIT and CIA, respectively. These simulated findings not only align with the theoretical model but also underscore the versatility of our approach. Subsequently, we expand our model to a more general case, demonstrating that a controlled transition from CIT to CIA is achievable by manipulating the dissipation rate of individual modes within the hybrid system, leading to either coherent or dissipative interactions between the modes. The results provide a pathway for designing hybrid systems that can control the group velocity of light, offering potential applications in the fields of optical switching and quantum information technology.
Bounds on Operator Dimensions in 2D Conformal Field Theories
Creators: name: Qualls, Joshua D.
name: Shapere, Alfred D.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We extend the work of Hellerman (arxiv:0902.2790) to derive an upper bound on the conformal dimension $Δ_2$ of the next-to-lowest nontrival primary operator in unitary two-dimensional conformal field theories without chiral primary operators. The bound we find is of the same form as found for $Δ_1$: $Δ_2 \leq c_{tot}/12 + O(1)$. We find a similar bound on the conformal dimension $Δ_3$, and present a method for deriving bounds on $Δ_n$ for any $n$, under slightly modified assumptions. For asymptotically large $c_{tot}$ and fixed $n$, we show that $Δ_n \leq \frac{c_{tot}}{12}+O(1)$. We conclude with a brief discussion of the gravitational implications of these results.
description: Corrected typos; revised arguments (adding detail) for clarity, results unchanged
Fast electron thermometry towards ultra-sensitive calorimetric detection
Creators: name: Gasparinetti, S.
name: Viisanen, K. L.
name: Saira, O. -P.
name: Faivre, T.
name: Arzeo, M.
name: Meschke, M.
name: Pekola, J. P.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We demonstrate radiofrequency thermometry on a micrometer-sized metallic island below 100 mK. Our device is based on a normal metal-insulator-superconductor tunnel junction coupled to a resonator with transmission readout. In the first generation of the device, we achieve 90 μK/Hz^1/2 noise-equivalent temperature with 10 MHz bandwidth. We measure the thermal relaxation time of the electron gas in the island, which we find to be of the order of 100 μs. Such a calorimetric detector, upon optimization, can be seamlessly integrated into superconducting circuits, with immediate applications in quantum-thermodynamics experiments down to single quanta of energy.
description: 6+4 pages, 4+4 figures
On Flux Rope Stability and Atmospheric Stratification in Models of Coronal Mass Ejections Triggered by Flux Emergence
Creators: name: Lee, E.
name: Lukin, V. S.
name: Linton, M. G.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Plasma Physics (physics.plasm-ph)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: Flux emergence is widely recognized to play an important role in the initiation of coronal mass ejections. The Chen-Shibata (2000) model, which addresses the connection between emerging flux and flux rope eruptions, can be implemented numerically to study how emerging flux through the photosphere can impact the eruption of a pre-existing coronal flux rope. The model's sensitivity to the initial conditions and reconnection micro-physics is investigated with a parameter study. In particular, we aim to understand the stability of the coronal flux rope in the context of X-point collapse and the effects of boundary driving in both unstratified and stratified atmospheres. In the absence of driving, we assess the behavior of waves in the vicinity of the X-point. With boundary driving applied, we study the effects of reconnection micro-physics and atmospheric stratification on the eruption. We find that the Chen-Shibata equilibrium can be unstable to an X-point collapse even in the absence of driving due to wave accumulation at the X-point. However, the equilibrium can be stabilized by reducing the compressibility of the plasma, which allows small-amplitude waves to pass through the X-point without accumulation. Simulations with the photospheric boundary driving evaluate the impact of reconnection micro-physics and atmospheric stratification on the resulting dynamics: we show the evolution of the system to be determined primarily by the structure of the global magnetic fields with little sensitivity to the micro-physics of magnetic reconnection; and in a stratified atmosphere, we identify a novel mechanism for producing quasi-periodic behavior at the reconnection site behind a rising flux rope as a possible explanation of similar phenomena observed in solar and stellar flares.
description: Submitted Feb 28, 2014 to, accepted Aug 14, 2014 by Astronomy & Astrophysics. 13 pages, 10 figures, 2 tables
Multivariate analysis of hydrophobic descriptors
Creators: name: Dove, Stefan
Publisher: name: Universität Regensburg
Year: 2014
Subjects: subject: 540 Chemie
subject: 615 Pharmazie

description: Multivariate approaches like principal component analysis (PCA) are powerful tools to investigate hydrophobic descriptors and to discriminate between intrinsic hydrophobicity and polar contributions as hydrogen bonds and other electronic effects. PCA of log P values measured for 37 solutes in eight solvent-water systems and of hydrophobic octanol-water substituent constants pi for 25 meta- and para-substituents from seven phenyl series were performed (re-analysis of previous work). In both cases, the descriptors are repro¬duced within experimental errors by two principal components, an intrinsic hydrophobic component and a second component accounting for differences between the systems due to electronic interactions. Underlying effects were identified by multiple linear regression analysis. Log P values depend on the water solubility of the solvents and hydrogen bonding capabilities of both the solute and the solvents. Results indicate different impacts of hydrogen bonds in nonpolar and polar solvent-water systems on log P and their dependence on isotropic and hydrated surface areas. In case of the pi-values, the second component (loadings and scores) correlates with electronic substituent constants. More detailed analysis of the data as pi-values of disubstituted benzenes XPhY has led to extended symmetric bilinear Hammett-type models relating interaction increments to cross products piX sigmaY, piY sigmaX and sigmaX sigmaY which are mainly due to mutual effects on hydrogen-bonds with octanol.
Supersymmetric invariant theories
Creators: name: Esipova, S. R.
name: Lavrov, P. M.
name: Radchenko, O. V.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study field models for which a quantum action (i.e. the action appearing in the generating functional of Green functions) is invariant under supersymmetric transformations. We derive the Ward identity which is direct consequence of this invariance. We consider a change of variables in functional integral connected with supersymmetric transformations when its parameter is replaced by a nilpotent functional of fields. Exact form of the corresponding Jacobian is found. We find restrictions on generators of supersymmetric transformations when a consistent quantum description of given field theories exists.
description: 1+9 pages; typos corrected
The restless population of bright X-ray sources of NCG 3621
Creators: name: Sacchi, A.
name: Imbrogno, M.
name: Motta, S. E.
name: Esposito, P.
name: Israel, G. L.
name: Vago, N. O. Pinciroli
name: De Luca, A.
name: Marelli, M.
name: Pintore, F.
name: Castillo, G. A. Rodríguez
name: Salvaterra, R.
name: Tiengo, A.
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report on the multi-year evolution of the population of X-ray sources in the nuclear region of NGC 3621 based on Chandra, XMM-Newton and Swift observations. Among these, two sources, X1 and X5, after their first detection in 2008, seem to have faded below the detectability threshold, a most interesting fact as X1 is associated with the AGN of the galaxy. Two other sources, X3 and X6 are presented for the first time, the former showing a peculiar short-term variability in the latest available dataset, suggesting an egress from eclipse, hence belonging to the handful of known eclipsing ultra-luminous X-ray sources. One source, X4, previously known for its "heart-beat", i.e. a characteristic modulation in its signal with a period of $\approx1$ h, shows a steady behaviour in the latest observation. Finally, the brightest X-ray source in NGC 3621, here labelled X2, shows steady levels of flux across all the available datasets but a change in its spectral shape, reminiscent of the behaviours of Galactic disk-fed X-ray binaries.
description: 11 pages, 10 figures, 3 tables, 2 appendices available online. Accepted for publication on A&A
El sistema de los carbonatos durante la electrodepositación en tanques de agua de mar natural /
Creators: name: Aguilar Hernández, Yoal A
Publisher: name: Universidad Autónoma de Baja California.
Year: 2022
Subjects: subject: GC116 A38 2002

description: Se llevo a cabo el proceso de electroacreción en tanques de agua de mar natural con capacidad de 30.28 litros.
The third family quark mass hierarchy and FCNC in the universal seesaw model
Creators: name: Morozumi, Takuya
name: Panuluh, Albertus Hariwangsa
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present the study of the quark sector of the universal seesaw model with $\mathrm{SU(2)_L \times SU(2)_R \times U(1)_{Y'}}$ gauge symmetry in the massless case of the two lightest quark families. This model aims to explain the mass hierarchy of the third family quark by introducing a vector-like quark (VLQ) partner for each quark. In this model, we introduce $\mathrm{SU(2)_L}$ and $\mathrm{SU(2)_R}$ Higgs doublets. We derive explicitly the Lagrangian for the quark sector, Higgs sector, and kinetic terms of the gauge fields, starting from the Lagrangian, which is invariant under $\mathrm{SU(2)_L \times SU(2)_R \times U(1)_{Y'}}$ gauge symmetry. At each stage of the symmetry breaking, we present the Lagrangian with the remaining gauge symmetry. Additionally, we investigate the flavor-changing neutral currents (FCNC) of Higgs ($h$) and $Z$-boson in the interaction with the top, heavy top, bottom, and heavy bottom quark.
description: 45 pages, 2 figures, add references, correct typos; add subsubsection 6.1.1; to be published in PTEP
In a hot bubble: why does superbubble feedback work, but isolated supernovae do not?
Creators: name: Sharma, Prateek
name: Roy, Arpita
name: Nath, Biman B.
name: Shchekinov, Yuri
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Using idealized 1-D Eulerian hydrodynamic simulations, we contrast the behavior of isolated supernovae with the superbubbles driven by multiple, collocated supernovae. Continuous energy injection via successive supernovae going off within the hot/dilute bubble maintains a strong termination shock. This strong shock keeps the superbubble over-pressured and drives the outer shock well after it becomes radiative. Isolated supernovae, in contrast, with no further energy injection, become radiative quite early ($\lesssim 0.1$ Myr, 10s of pc), and stall at scales $\lesssim 100$ pc. We show that isolated supernovae lose almost all of their mechanical energy by a Myr, but superbubbles can retain up to $\sim 40\%$ of the input energy in form of mechanical energy over the lifetime of the star cluster (few 10s of Myr). These conclusions hold even in the presence of realistic magnetic fields and thermal conduction. We also compare various recipes for implementing supernova feedback in numerical simulations. For various feedback prescriptions we derive the spatial scale below which the energy needs to be deposited for it to couple to the interstellar medium (ISM). We show that a steady thermal wind within the superbubble appears only for a large number ($\gtrsim 10^4$) of supernovae. For smaller clusters we expect multiple internal shocks instead of a smooth, dense thermalized wind.
description: 16 pages, 9 figures; identical to the MNRAS-accepted version
On the rise of fear speech in online social media
Creators: name: Saha, Punyajoy
name: Garimella, Kiran
name: Kalyan, Narla Komal
name: Pandey, Saurabh Kumar
name: Meher, Pauras Mangesh
name: Mathew, Binny
name: Mukherjee, Animesh
Publisher: name: arXiv
Year: 2023
Subjects: subject: Social and Information Networks (cs.SI)
subject: Computation and Language (cs.CL)
subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: Recently, social media platforms are heavily moderated to prevent the spread of online hate speech, which is usually fertile in toxic words and is directed toward an individual or a community. Owing to such heavy moderation, newer and more subtle techniques are being deployed. One of the most striking among these is fear speech. Fear speech, as the name suggests, attempts to incite fear about a target community. Although subtle, it might be highly effective, often pushing communities toward a physical conflict. Therefore, understanding their prevalence in social media is of paramount importance. This article presents a large-scale study to understand the prevalence of 400K fear speech and over 700K hate speech posts collected from Gab.com. Remarkably, users posting a large number of fear speech accrue more followers and occupy more central positions in social networks than users posting a large number of hate speech. They can also reach out to benign users more effectively than hate speech users through replies, reposts, and mentions. This connects to the fact that, unlike hate speech, fear speech has almost zero toxic content, making it look plausible. Moreover, while fear speech topics mostly portray a community as a perpetrator using a (fake) chain of argumentation, hate speech topics hurl direct multitarget insults, thus pointing to why general users could be more gullible to fear speech. Our findings transcend even to other platforms (Twitter and Facebook) and thus necessitate using sophisticated moderation policies and mass awareness to combat fear speech.
description: 16 pages, 9 tables, 15 figures, accepted in Proceedings of the National Academy of Sciences of the United States of America
An Overview of Analysis Methods and Evaluation Results for Caching Strategies
Creators: name: Hasslinger, Gerhard
name: Okhovatzadeh, Mahshid
name: Ntougias, Konstantinos
name: Hasslinger, Frank
name: Hohlfeld, Oliver
Publisher: name: arXiv
Year: 2023
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Computer and information sciences

description: We survey analytical methods and evaluation results for the performance assessment of caching strategies. Knapsack solutions are derived, which provide static caching bounds for independent requests and general bounds for dynamic caching under arbitrary request pattern. We summarize Markov- and time-to-live-based solutions, which assume specific stochastic processes for capturing web request streams and timing. We compare the performance of caching strategies with different knowledge about the properties of data objects regarding a broad set of caching demands. The efficiency of web caching must regard benefits for network wide traffic load, energy consumption and quality-of-service aspects in a tradeoff with costs for updating and storage overheads.
description: 25 pages
Ferromagnetic phase in the polarized two-species bosonic Hubbard Model
Creators: name: Hettiarachchilage, Kalani
name: Rousseau, Valéry G.
name: Tam, Ka-Ming
name: Jarrell, Mark
name: Moreno, Juana
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We recently studied a doped two-dimensional bosonic Hubbard model with two hard-core species, with different masses, using quantum Monte Carlo simulations [Phys. Rev. B 88, 161101(R) (2013)]. Upon doping away from half-filling, we find several distinct phases, including a phase-separated ferromagnet with Mott behavior for the heavy species and both Mott insulating and superfluid behaviors for the light species. Introducing polarization, an imbalance in the population between species, we find a fully phase-separated ferromagnet. This phase exists for a broad range of temperatures and polarizations. By using finite size scaling of the susceptibility, we find a critical exponent which is consistent with the two-dimensional Ising universality class. Significantly, since the global entropy of this phase is higher than that of the ferromagnetic phase with single species, its experimental observation in cold atoms may be feasible.
description: 7 pages, 7 figures
General-relativistic instability in rapidly accreting supermassive stars in the presence of dark matter
Creators: name: Haemmerlé, Lionel
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The collapse of supermassive stars (SMSs) via the general-relativistic (GR) instability would provide a natural explanation to the existence of the most extreme quasars. The presence of dark matter in SMSs is thought to potentially impact their properties, in particular their mass at collapse. Dark matter might be made of weakly interacting massive particles (WIMPs) that can be captured by the gravitational potential well of SMSs due to interaction with the baryonic gas. The annihilation of WIMPs can provide fuel to support the star before H-burning ignition, favouring low densities of baryonic gas, long stellar lifetimes and high final masses. Here, we estimate the impact of dark matter on the GR dynamical stability of rapidly accreting SMSs. We add a dark matter term to the relativistic equation of adiabatic pulsations and apply it to hylotropic structures in order to determine the onset point of the GR instability. We find that, in principle, the dark matter gravitational field can remove completely the GR instability. However, for SMSs fuelled by H-burning, the dark matter densities required to stabilise the star against GR are orders of magnitude above the values that are expected for the dark matter background. On the other hand, for SMSs fuelled by WIMP annihilation, we find that the low densities of baryonic gas inhibit the destabilising GR corrections, which shifts the stability limit by typically an order of magnitude towards higher masses. As long as central temperatures $\lesssim10^7$ K are maintained by WIMP annihilation, the GR instability is reached only for stellar masses $>10^6$ M$_\odot$. Dark matter can impact the GR dynamical stability of SMSs only in the case of energetically significant WIMP annihilation. The detection of a SMS with mass $>10^6$ M$_\odot$ in an atomically cooled halo can be interpreted as an evidence of WIMP annihilation in the star's core.
description: accepted in A&A
Design principles for replicated storage systems built on emerging storage technologies
Creators: name: Kim, Thomas
Publisher: name: Carnegie Mellon University
Year: 2023
Subjects: subject: 80302 Computer System Architecture
subject: FOS: Computer and information sciences

description: With the slowing down of Moore’s law, persistent storage hardware has continued to scale at the cost of exposing hardware-level write idiosyncrasies to the software. Thus, a key challenge for systems developers is to reason about and design around these idiosyncrasies to create replicated storage systems that can effectively leverage these new technologies. Two examples of such new and emerging persistent storage technologies are Intel Optane non-volatile main memory and Zoned Namespace (ZNS) solid-state drives. Intel Optane provides persistent byte-addressable storage with throughput and latency rivaling DRAM, but per-DIMM write throughput is significantly lower than read throughput–this imbalance presents challenges in providing high availability in replicated storage systems, due to the severely limited ability to bulk-ingest data. ZNS is a new interface for NVMe-based SSDs that eliminates the flash translation layer, thus preventing garbage collection-related performance degradation and reducing the need for overprovisioned flash hardware. A consequence of these benefits is the loss of overwrite semantics for blocks in a ZNS device, thus necessitating flash-based replicated storage systems to be redesigned for ZNS compatibility. Based on our experiences and setbacks when designing, implementing, and evaluating systems based on Optane and ZNS, we propose three guidelines to assist developers in designing storage systems on new and emerging persistent storage technologies: (1) systems, even those expected to serve read-heavy workloads, should prioritize optimizing write performance, (2) set and fulfill performance, durability, and fault tolerance guarantees, but do not exceed them as that may result in excessive write overheads, and (3) systems can overcome limitations of write-constrained persistent hardware by optimizing data placement and internal data flows based on assumptions about temporal and spatial locality of the expected client workload. The first system we present is CANDStore, a highly-available, cost-effective, replicated key-value store that uses Intel Optane for primary storage, and solves the challenge of bottlenecked data ingestion during primary failure recovery through a novel online workload-guided recovery protocol. The second system we present is RAIZN, which is a system that provides RAID-like striping and redundancy for arrays of ZNS SSDs, and solves the various challenges that arise as a result of the lack of overwrite semantics in ZNS. We describe how the above guidelines arose from the setbacks and successes during the development of the above two systems, then apply these guidelines to extend the functionality of RAIZN to create RAIZN+. The final part of this thesis details exactly how we applied these guidelines to achieve near-zero write amplification when serving RocksDB workloads in RAIZN+.
title: Southeast Fisheries-Independent Survey (SEFIS) NOAA ship PISCES cruise number PC-17-03 from 11 – 26 July 2017 (Leg 1) 29 July – 13 August 2017 (Leg 2) 14 August 2017 (transit)
Creators: name: Bacheler, Nathan
Publisher: name: Southeast Fisheries Science Center (U.S.)
Year: 2017

description: PC-17-03
Molecular MRI-Based Monitoring of Cancer Immunotherapy Treatment Response
Creators: name: Vladimirov, Nikita
name: Perlman, Or
Publisher: name: arXiv
Year: 2023
Subjects: subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: Immunotherapy constitutes a paradigm shift in cancer treatment. Its FDA approval for several indications has yielded improved prognosis for cases where traditional therapy has shown limited efficiencey. However, many patients still fail to benefit from this treatment modality, and the exact mechanisms responsible for tumor response are unknown. Noninvasive treatment monitoring is crucial for longitudinal tumor characterization and the early detection of non-responders. While various medical imaging techniques can provide a morphological picture of the lesion and its surrounding tissue, a molecular-oriented imaging approach holds the key to unraveling biological effects that occur much earlier in the immunotherapy timeline. Magnetic resonance imaging (MRI) is a highly versatile imaging modality, where the image contrast can be tailored to emphasize a particular biophysical property of interest using advanced engineering of the imaging pipeline. In this review, recent advances in molecular-MRI based cancer immunotherapy monitoring are described. Next, the presentation of the underlying physics, computational, and biological features are complemented by a critical analysis of the results obtained in preclinical and clinical studies. Finally, emerging artificial intelligence (AI)-based strategies to further distill, quantify, and interpret the image-based molecular MRI information are discussed in terms of perspectives for the future.
description: 25 pages, 7 figures
title: Southeast Fisheries-Independent Survey (SEFIS) NOAA ship PISCES cruise number PC-16-03 from 23 July 2016 (transit) 03 – 15 July 2016 (Leg 1) 19 July – 03 August 2016 (Leg 2)
Creators: name: Bacheler, Nathan
Publisher: name: Southeast Fisheries Science Center (U.S.)
Year: 2016

description: PC-16-03 (0043)
title: Southeast Fisheries-Independent Survey (SEFIS) NOAA ship PISCES cruise number PC-15-03 from 10 – 18 July 2015 ,  21 July – 03 August 2015 and 03 – 08 August 2015 (transit to Pascagoula)
Creators: name: Bacheler, Nathan
Publisher: name: Southeast Fisheries Science Center (U.S.)
Year: 2015

description: PC-15-03 (0038)
XMM-Newton and NuSTAR discovery of a likely IP candidate XMMU J173029.8-330920 in the Galactic Disk
Creators: name: Mondal, Samaresh
name: Ponti, Gabriele
name: Filor, Luke
name: Bao, Tong
name: Haberl, Frank
name: Salcedo, Ciro
name: Campana, Sergio
name: Hailey, Charles J.
name: Mori, Kaya
name: Rea, Nanda
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We aim at characterizing the population of low-luminosity X-ray sources in the Galactic plane by studying their X-ray spectra and periodic signals in the light curves. We are performing an X-ray survey of the Galactic disk using XMM-Newton, and the source XMMU J173029.8-330920 was serendipitously discovered in our campaign. We performed a follow-up observation of the source using our pre-approved NuSTAR target of opportunity time. We used various phenomenological models in xspec for the X-ray spectral modeling. We also computed the Lomb-Scargle periodogram to search for X-ray periodicity. A Monte Carlo method was used to simulate 1000 artificial light curves to estimate the significance of the detected period. We also searched for X-ray, optical, and infrared counterparts of the source in various catalogs. The spectral modeling indicates the presence of an intervening cloud with $N_{\rm H}\sim(1.5-2.3)\times10^{23}\ \rm cm^{-2}$ that partially absorbs the incoming X-ray photons. The X-ray spectra are best fit by a model representing emission from a collisionally ionized diffuse gas with plasma temperature $kT=26^{+11}_{-5}$ keV. Furthermore, an Fe $K_α$ line at $6.47^{+0.13}_{-0.06}$ keV was detected with an equivalent width of the line of $312\pm104$ eV. We discovered a coherent pulsation with a period of $521.7\pm0.8$ s. The 3-10 keV pulsed fraction of the source is around $\sim$50-60\%. The hard X-ray emission with plasma temperature $kT=26^{+11}_{-5}$ keV, iron $K_α$ emission at 6.4 keV and a periodic behavior of $521.7\pm0.8$ s suggest XMMU J173029.8-33092 to be an intermediate polar. We estimated the mass of the central white dwarf to be $0.94-1.4\ M_{\odot}$ by assuming a distance to the source of $\sim1.4-5$ kpc.
description: 7 pages, 4 figures, accepted for publication in A&A
Null Infinity and Horizons: A New Approach to Fluxes and Charges
Creators: name: Ashtekar, Abhay
name: Speziale, Simone
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We introduce a Hamiltonian framework tailored to degrees of freedom (DOF) of field theories that reside in suitable 3-dimensional open regions, and then apply it to the gravitational DOF of general relativity. Specifically, these DOF now refer to open regions of null infinity, and of black hole (and cosmological) horizons representing equilibrium situations. At null infinity the new Hamiltonian framework yields the well-known BMS fluxes and charges. By contrast, all fluxes vanish identically at black hole (and cosmological) horizons just as one would physically expect. In a companion paper we showed that, somewhat surprisingly, the geometry and symmetries of these two physical configurations descend from a common framework. This paper reinforces that theme: Very different physics emerges in the two cases from a common Hamiltonian framework because of the difference in the nature of degrees of freedom. Finally, we compare and contrast this Hamiltonian approach with those available in the literature.
description: 35 pages. At referee's suggestion version 1 of arXiv:2402.17977 was split into two papers. This paper contains slightly expanded versions of the material that was in sections IV and V and Appendix A and B of that submission. Both papers are at press at Phy. Rev. D
Matrix Bases for Star Products: a Review
Creators: name: Lizzi, Fedele
name: Vitale, Patrizia
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We review the matrix bases for a family of noncommutative $\star$ products based on a Weyl map. These products include the Moyal product, as well as the Wick-Voros products and other translation invariant ones. We also review the derivation of Lie algebra type star products, with adapted matrix bases. We discuss the uses of these matrix bases for field theory, fuzzy spaces and emergent gravity.
Acondicionamiento de Lyropecten subnodosus (Sowerby, 1835) :
Creators: name: Gutierrez Villasenor, Carlos Ernesto
Publisher: name: Universidad Autónoma de Baja California.
Year: 2022
Subjects: subject: SH373 G88 1996

description: Se acondicionó la almeja Lyropecten subnodosus como parte del desarrollo de una técnica para su cultivo.
Truncation and duality results for Hopf image algebras
Creators: name: Banica, Teodor
Publisher: name: arXiv
Year: 2014
Subjects: subject: Operator Algebras (math.OA)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics

description: Associated to an Hadamard matrix $H\in M_N(\mathbb C)$ is the spectral measure $μ\in\mathcal P[0,N]$ of the corresponding Hopf image algebra, $A=C(G)$ with $G\subset S_N^+$. We study here a certain family of discrete measures $μ^r\in\mathcal P[0,N]$, coming from the idempotent state theory of $G$, which converge in Cesàro limit to $μ$. Our main result is a duality formula of type $\int_0^N(x/N)^pdμ^r(x)=\int_0^N(x/N)^rdν^p(x)$, where $μ^r,ν^r$ are the truncations of the spectral measures $μ,ν$ associated to $H,H^t$. We prove as well, using these truncations $μ^r,ν^r$, that for any deformed Fourier matrix $H=F_M\otimes_QF_N$ we have $μ=ν$.
description: 17 pages
On the nature of the 2.4 hr-period eclipsing cataclysmic variable W2 in 47 Tuc
Creators: name: Amato, R.
name: La Palombara, N.
name: Imbrogno, M.
name: Israel, G. L.
name: Esposito, P.
name: de Martino, D.
name: Webb, N. A.
name: Iaria, R.
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: W2 (CXOGlb J002415.8-720436) is a cataclysmic variable (CV) in the Galactic globular cluster 47 Tucanae. Its modulation was discovered within the CATS@BAR project. The source shows all the properties of magnetic CVs, but whether it is a polar or an intermediate polar is still a matter of debate. This paper investigates the spectral and temporal properties of the source, using all archival X-ray data from Chandra and eROSITA Early Data Release, to establish whether the source falls within the category of polars or intermediate polars. We fitted Chandra archival spectra with three different models: a power law, a bremsstrahlung and an optically thin thermal plasma. We also explored the temporal properties of the source with searches for pulsations with a power spectral density analysis and a Rayleigh test ($Z_n^2$). W2 displays a mean luminosity of $\sim 10^{32}$ erg s$^{-1}$ over a 20-year span, despite lower values in a few epochs. The source is not detected in the latest observation, taken with Chandra in 2022, and we infer an X-ray luminosity $\leq 7 \times 10^{31}$ erg s$^{-1}$. The source spectral shape does not change over time and can be equally well fitted with each of the three models, with a best-fit photon index of 1.6 for the power law and best-fit temperatures of 10 keV for both the bremsstrahlung and the thermal plasma models. We confirm the previously detected period of 8649 s, ascribed to the binary orbital period, and found a cycle-to-cycle variability associated with this periodicity. No other significant pulsation is detected. Considering the source orbital period, luminosity, spectral characteristics, long-term evolution and strong cycle-to-cycle variability, we suggest that W2 is a magnetic CV of the polar type.
description: 13 pages, 8 figures. Accepted for publication on A&A
Bravo Compound
Creators: name: Hope, Cat
Publisher: name: Monash University
Year: 2023
Subjects: classificationCode: 360302
subject: Music composition and improvisation

description: For Laptop OrchestraComposed in 2015

Composed for Gail Priest and ERK (Electronic Resonance Korp).
You need the Decibel ScorePlayer and the score file (provided here) to peform this work.

PROGRAM NOTE
10.4 Forcible transfer of children to Bravo Compound at Christmas Island

Under the Convention on the Rights of the Child, children in detention should be treated with humanity and respect, and in a manner which takes into account the needs of persons his or her age (article 37(c)). When the Inquiry team visited Christmas Island in July 2014, a number of unaccompanied children complained that the Serco officers had used force against them when they moved them from a compound known as ‘Charlie’ to another compound known as ‘Bravo’ on 24 March 2014. The following is a description of what happened during this move. On 21 March 2014, in response to safety concerns arising from an incoming tropical cyclone, all families and children were transferred from the family detention centres at Christmas Island to the single men’s detention centre at North West Point. The single men’s compound at North West Point is a large high security complex; purpose-built to hold single men on Christmas Island. The cyclone caused significant damage to two of these family detention centres and they were deemed uninhabitable until repairs could be made. Extra space was needed for families and the Department decided that as there was space at the Charlie Compound, this was the best place to move families. This necessitated the move of the 38 unaccompanied children from ‘Charlie’ Compound to the adjacent ‘Bravo’ Compound. On 23 March 2014, the evening before the scheduled transfer, the children were informed of the planned move by an officer of MAXimus Solutions – the care and welfare provider for unaccompanied children. MAXimus sent an email to the Department’s Regional Manager, the children’s delegated guardian, and the Phosphate Hill Centre Manager indicating that the children would be refusing to leave Charlie compound. In the email, MAXimus said that it ‘wanted to alert stakeholders to this so we can minimise any negative behaviours tomorrow’.
p162 of ‘The Forgotten Children: National Inquiry into Children in Immigration Detention” report.

The colour combination in the work is taken from a child's drawing from in detention, included at the end of (but not performed in) the score.

PERFORMANCESPremiered by WALO (the Western Australian Laptop Orchestra), 21 September, 2015, Sound Spectrum Festival.
Monash University, October 2018.
Quantum phenomena modelled by interactions between many classical worlds
Creators: name: Hall, Michael J. W.
name: Deckert, D. -A.
name: Wiseman, Howard M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate whether quantum theory can be understood as the continuum limit of a mechanical theory, in which there is a huge, but finite, number of classical 'worlds', and quantum effects arise solely from a universal interaction between these worlds, without reference to any wave function. Here a `world' means an entire universe with well-defined properties, determined by the classical configuration of its particles and fields. In our approach each world evolves deterministically; probabilities arise due to ignorance as to which world a given observer occupies; and we argue that in the limit of infinitely many worlds the wave function can be recovered (as a secondary object) from the motion of these worlds. We introduce a simple model of such a 'many interacting worlds' approach and show that it can reproduce some generic quantum phenomena---such as Ehrenfest's theorem, wavepacket spreading, barrier tunneling and zero point energy---as a direct consequence of mutual repulsion between worlds. Finally, we perform numerical simulations using our approach. We demonstrate, first, that it can be used to calculate quantum ground states, and second, that it is capable of reproducing, at least qualitatively, the double-slit interference phenomenon.
description: Published version (including further discussion of interpretation and quantum limit)
An Impact of the Trivedi Effect®-Biofield Energy Healing Based Herbomineral Formulation on Pro-inflammatory Cytokines Expression in Mouse Splenocytes
Creators: name: Dumas, Daphne Luisa
Publisher: name: SMN - The ScienceMedia Network
Year: 2019
Subjects: Natural Sciences

description: Due to the increased popularity of herbomineral preparations in the healthcare sector, a new proprietary herbomineral formulation was formulated consisting of ashwagandha root extract and three minerals viz. zinc chloride, magnesium gluconate, and sodium selenate. The objective of the study was to evaluate the in vitro effect of Biofield Energy Healing (The Trivedi Effect®) on the test formulation using murine splenocyte cells. The herbomineral formulation was divided into two parts; one defined as the control, while the other part was treated with the Biofield Energy Healing Treatment performed from a remote distance by twenty renowned Biofield Energy Healers (The Trivedi Effect®) and defined as the Biofield Treated formulation. The splenocyte cells were exposed to test formulations at concentration from 0.00001053 to 10.53 µg/mL and were analyzed after 48 hours for cell viability using MTT assay. The expression of the cytokines (TNF-α, IFN-γ, IL-1β, and MIP-1α) was determined using ELISA assay. The cell viability data showed that all the tested concentration ranges were found to be safe with percentage cell viability at more than 80%. Further, TNF-α expression was significantly inhibited in the Biofield Treated test formulation group with respect to the vehicle control, while at 0.001053 and 0.1053 µg/mL, the expression was suppressed by 1.70% and 8.16%, respectively in the Biofield Treated test formulation compared to the untreated formulation. However, a significant immunosuppression was reported in IFN-γ expression at 0.00001053, 0.0001053, 0.01053, 0.1053, and 1.053 µg/mL by 12.63%, 2.31%, 8.31%, 9.15%, and 7.86%, respectively in the Biofield Treated test formulation compared with the untreated test formulation. The MIP-1α expression was inhibited by 8.31%, 21.53%, and 8.70% at 0.0001053, 0.01053, and 0.1053 µg/mL, respectively in the Biofield Treated formulation compared with the untreated test formulation. However, IL-1β expression was significantly suppressed by 19.72% at concentration 0.00001053 µg/mL in the Biofield Treated test formulation compared with the untreated test formulation. Thus, the down-regulation of tested cytokines and chemokines in the Biofield Energy Healing test formulation might be applicable for controlling acute and chronic inflammation in many clinical diseases. Overall, the results demonstrated that The Trivedi Effect®- Biofield Energy Healing (TEBEH) has the capacity to potentiate the immunomodulatory activity of the test formulation, which can be useful against autoimmune disorders. Biofield Treated Test formulation may also be useful in anti-aging, anti-inflammatory, stress management and in preventing immune-mediated tissue damage in organ transplants by improving overall health and quality of life.
Critical Exponents in Two Dimensions and Pseudo-ε Expansion
Creators: name: Nikitina, M. A.
name: Sokolov, A. I.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The critical behavior of two-dimensional $n$-vector $λϕ^4$ field model is studied within the framework of pseudo-$ε$ expansion approach. Pseudo-$ε$ expansions for Wilson fixed point location $g^*$ and critical exponents originating from five-loop 2D renormalization group series are derived. Numerical estimates obtained within Padé and Padé-Borel resummation procedures as well as by direct summation are presented for $n = 1$, $n = 0$ and $n = -1$, i. e. for the models which are exactly solvable. The pseudo-$ε$ expansions for $g^*$, critical exponents $γ$ and $ν$ have small lower-order coefficients and slow increasing higher-order ones. As a result, direct summation of these series with optimal cut off provides numerical estimates that are no worse than those given by the resummation approaches mentioned. This enables one to consider the pseudo-$ε$ expansion technique itself as some specific resummation method.
description: Eq. (5) corrected, acknowledgment added, figures revised to meet journal format
Matrix Box-Cox Models for Multivariate Realized Volatility
Creators: name: Weigand, Roland
Publisher: name: Universität Regensburg
Year: 2014
Subjects: subject: Realized covariance matrix, dynamic correlation, semiparametric estimation, density forecasting
subject: 330 Wirtschaft
subject: C14
subject: C32
subject: C51
subject: C53
subject: C58

description: We propose flexible models for multivariate realized volatility dynamics which involve generalizations of the Box-Cox transform to the matrix case. The matrix Box-Cox model of realized covariances (MBC-RCov) is based on transformations of the covariance matrix eigenvalues, while for the Box-Cox dynamic correlation (BC-DC) specification the variances are transformed individually and modeled jointly with the correlations. We estimate transformation parameters by a new multivariate semiparametric estimator and discuss bias-corrected point and density forecasting by simulation. The methods are applied to stock market data where excellent in-sample and out-of-sample performance is found.
Experimental study of a turbulent boundary layer with a rough-to-smooth change in surface conditions at high Reynolds numbers
Creators: name: Li, Mogeng
name: de Silva, Charitha M.
name: Chung, Daniel
name: Pullin, Dale I.
name: Marusic, Ivan
name: Hutchins, Nicholas
Publisher: name: arXiv
Year: 2023
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: This study presents an experimental dataset documenting the evolution of a turbulent boundary layer downstream of a rough-to-smooth surface transition. To investigate the effect of upstream flow conditions, two groups of experiments are conducted. For the \emph{Group-Re} cases, a nominally constant viscous-scaled equivalent sand grain roughness $k_{s0}^+\approx160$ is maintained on the rough surface, while the friction Reynolds number $Re_{τ0}$ ranges from 7100 to 21000. For the \emph{Group-ks} cases, $Re_{τ0}\approx14000$ is maintained while $k_{s0}^+$ ranges from 111 to 228. The wall-shear stress on the downstream smooth surface is measured directly using oil-film interferometry to redress previously reported uncertainties in the skin-friction coefficient recovery trends. In the early development following the roughness transition, the flow in the internal layer is not in equilibrium with the wall-shear stress. This conflicts with the common practise of modelling the mean velocity profile as two log laws below and above the internal layer height, as first proposed by Elliott (\textit{Trans. Am. Geophys. Union}, vol. 39, 1958, pp 1048--1054). As a solution to this, the current data are used to model the recovering mean velocity semi-empirically by blending the corresponding rough-wall and smooth-wall profiles. The over-energised large-scale motions leave a strong footprint in the near-wall region of the energy spectrum, the frequency and magnitude of which exhibit dependence on $Re_{τ0}$ and $k_{s0}^+$ respectively. The energy distribution in near-wall small scales is mostly unaffected by the presence of the outer flow with rough-wall characteristics, which can be used as a surrogate measure to extract the local friction velocity.