cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Phi-meson photoproduction from nuclei
Creators: name: Sibirtsev, A.
name: Hammer, H. -W.
name: Meißner, U. -G.
name: Thomas, A. W.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We study coherent and incoherent phi-meson photoproduction from nuclei. The available data are analyzed in terms of single and coupled channel photoproduction. It is found that the data on coherent photoproduction can be well reproduced within a single channel optical model and show only little room for omega-phi mixing. These data indicate a normal distortion of the phi-meson in nuclei, which is compatible with the results obtained through the vector meson dominance model. The data on incoherent phi-meson photoproduction show an anomalous A-dependence resulting in a very strong phi-meson distortion. These data can be explained by a coupled channel effect through the dominant contribution from the omega -> phi or pi -> phi transition or, more speculative, through the excitation of a cryptoexotic B_phi-baryon.
description: 11 pages, 9 Figures
Kildonan – Iron Age Reconstruction
Creators: name: Kennedy, Sarah
name: Oliver, Iain
name: Miller, Alan
name: Cassidy, Catherine Anne
name: Aitken, Jacquie
Publisher: name: Zenodo
Year: 2020
Subjects: CULTURAL HERITAGE
HISTORY
Digital Heritage
Digital Reconstruction
Kildonan

description: A project between Timespan Museum, a cultural organisation in Helmsdale, a village in the very northeast of Scotland, local, global and planetary ambitions to weaponise culture for social change and the University of St Andrews as part of CINE project.
Jeanne d'Arc au front de 14: une guerre à la française (Maurice Barrès et Léon Bloy)
Creators: name: Simpson, Anne
Publisher: name: University of British Columbia
Year: 2009

description: Ce travail explore la topologie de la symbolique du nationalisme français à travers la figure de Jeanne d'Arc, dans l'oeuvre de Maurice Barrès, Autour de Jeanne d'Arc (1916), et celle de Léon Bloy, Jeanne d'Arc et l'Allemagne (1915). Ces deux textes sont des artefacts culturels de la Grande Guerre, et leur convocation tutélaire de Jeanne d'Arc, comme figure identitaire française, fait émerger deux modes de penser, deux visions de l'histoire et deux conceptions de la nation qui révèlent d'irréductibles oppositions idéologiques au sein de la droite conservatrice. Notre parcours suit les micro-transformations discursives du topos Jeanne d'Arc, en prise directe avec le texte. Ce «pas-à-pas» révèle que 1'émergence de Jeanne génère une réarticulassions du fonds mémoriel national qui s'inscrit chez Barrès, dans l'ordre nouveau d'une France régénérée par la guerre, alors que pour Bloy, i l trace une topologie de la dégénérescence, fondee sur une vision totalisante où le retour à Dieu détermine le sens unique de l'histoire. En tant que production symbolique, la portée générale de Jeanne d'Arc en 1914 soulève, paradoxalement, la problématique de la construction de 1'individualité: le combat de Jeanne au front de 14 passe par une revanche franco-française dans une République "déracinée" et déchristianisée -- mais non désacralisée. En effet, le mysticisme frelatéé de la Jeanne barrésienne et le messianisme millénariste de la Jeanne bloyenne traduisent, chez nos deux auteurs, la volonté d'un retour à un âge d'or de la nation. Notre analyse montre que cette pensée de la fracture s'articule sur un mouvement de transfert du politique dans la sphère du mysticisme. Les forces cohésives qui autorisent la jonction des destinées de Jeanne et de la France sont ici déployées au niveau du discours, à travers leurs déplacements, leurs réarticulassions, leurs discontinuités. Elles ne sont pas renvoyées à une idéalité conceptuelle. L'enjeu de 1'analyse est de constituer des réseaux de sens et de circonscrire progressivement des séries discursives récurrentes qui nous donneront, en fin de parcours, une idée de la francité en 1914, c'est-à-dire, pour Barrès et Bloy, celle d'une nation en mal d'origines.
A REVIEW ON MAGNETIC NANOPARTICLES- SYNTHESIS, FUNCTIONALISATION AND APPLICATIONS
Creators: name: T.Indira Priyadarshini*1, Dr.Chandrasekhar Rao Baru2, Dr.CH.Kantlam3, G.Srujana4
Publisher: name: Zenodo
Year: 2023

description: Magnetic nanoparticles are nanoparticles which exhibit superparamagnetic properties owing to their small size. They have wide range of applications which are mentioned else where in this review[1]. One of them is targeting of drugs to site of action, known by the terms site-specific drug delivery or drug targeting. In this method magnetic nanoparticles as drug carriers are administered in to the body and are manipulated by external magnetic fields to reach the target area. This method is highly valuable for treating cancers due to the advantages that normal cells are not exposed to the cytotoxic drugs. Further it resulted in improved efficacy, reduced drug dosage and side effects. Magnetic drug targeting requires two components, a nano sized carrier particle system and an external magnet system to guide the drug carriers to the target site. Till date there have been many efforts to design the magnet systems for targeted drug delivery.  This review gives a detailed account on the preparation methods, applications along with recent progress that has taken place in this field
Statistical Properties of the GALEX/SDSS matched source catalogs, and classification of the UV sources
Creators: name: Bianchi, Luciana
name: Rodriguez-Merino, Lino
name: Viton, Maurice
name: Laget, Michel
name: Efremova, Boryana
name: Herald, James
name: Conti, Alberto
name: Shiao, Bernie
name: de Paz, Armando Gil
name: Salim, Samir
name: Thakar, A.
name: Friedman, Peter G.
name: Rey, S. C.
name: Thilker, David
name: Barlow, Tom A.
name: Budavari, Tamas
name: Donas, Jose
name: Forster, Karl
name: Heckman, Timothy M.
name: Lee, Young-Wook
name: Madore, Barry F.
name: Martin, D. Christopher
name: Milliard, Bruno
name: Morrissey, Patrick
name: Neff, Susan G.
name: Rich, R. Michael
name: Schiminovich, David
name: Seibert, Mark
name: Small, Todd
name: Szalay, Alex S.
name: Wyder, Ted K.
name: Welsh, Barry Y.
name: Yi, Sukyoung K.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We use the Galaxy Evolution Explorer (GALEX) Medium and All-Sky-Imaging Survey (MIS & AIS) data from the first public data release (GR1), matched to the Sloan Digital Sky Survey (SDSS) DR3 catalog, to perform source classification. The GALEX surveys provide photometry in far- and near-UV bands and the SDSS in five optical bands (u,g,r,i,z). The GR1/DR3 overlapping areas are 363[83]deg^2 for the GALEX AIS[MIS], for sources within the 0.5deg central area of the GALEX fields. Our sample covers mostly |b|>30deg galactic latitudes. We present statistical properties of the GALEX/SDSS matched sources catalog, containing >2x10^6 objects detected in at least one UV band. We classify the matched sources by comparing the seven-band photometry to model colors constructed for different classes of astrophysical objects. For sources with photometric errors <0.3 mag, the corresponding typical AB-magnitude limits are m_FUV~21.5, m_NUV~22.5 for AIS, and m_FUV~24, m_NUV~24.5 for MIS. At AIS depth, the number of Galactic and extragalactic objects are comparable, but the latter predominate in the MIS. Based on our stellar models, we estimate the GALEX surveys detect hot White Dwarfs throughout the Milky Way halo (down to a radius of 0.04 R_sun at MIS depth), providing an unprecedented improvement in the Galactic WD census. Their observed surface density is consistent with Milky Way model predictions. We also select low-redshift QSO candidates, extending the known QSO samples to lower magnitudes, and providing candidates for detailed z~1 follow-up investigations. SDSS optical spectra available for a large subsample confirm the classification for the photometrically selected candidates with 97% purity for single hot stars, ~45%(AIS)/31%(MIS) for binaries containing a hot star and a cooler companion, and about 85% for QSOs.
description: 33 pages, 11 figures, accepted for the GALEX special issue of ApJS. For a version with full resolution figures see http://dolomiti.pha.jhu.edu/publgoto.html
MS$^2$L: Multi-Task Self-Supervised Learning for Skeleton Based Action Recognition
Creators: name: Lin, Lilang
name: Song, Sijie
name: Yan, Wenhan
name: Liu, Jiaying
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: In this paper, we address self-supervised representation learning from human skeletons for action recognition. Previous methods, which usually learn feature presentations from a single reconstruction task, may come across the overfitting problem, and the features are not generalizable for action recognition. Instead, we propose to integrate multiple tasks to learn more general representations in a self-supervised manner. To realize this goal, we integrate motion prediction, jigsaw puzzle recognition, and contrastive learning to learn skeleton features from different aspects. Skeleton dynamics can be modeled through motion prediction by predicting the future sequence. And temporal patterns, which are critical for action recognition, are learned through solving jigsaw puzzles. We further regularize the feature space by contrastive learning. Besides, we explore different training strategies to utilize the knowledge from self-supervised tasks for action recognition. We evaluate our multi-task self-supervised learning approach with action classifiers trained under different configurations, including unsupervised, semi-supervised and fully-supervised settings. Our experiments on the NW-UCLA, NTU RGB+D, and PKUMMD datasets show remarkable performance for action recognition, demonstrating the superiority of our method in learning more discriminative and general features. Our project website is available at https://langlandslin.github.io/projects/MSL/.
description: Accepted by ACMMM 2020
Extreme Learning Machine for land cover classification
Creators: name: Pal, Mahesh
Publisher: name: arXiv
Year: 2008
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: This paper explores the potential of extreme learning machine based supervised classification algorithm for land cover classification. In comparison to a backpropagation neural network, which requires setting of several user-defined parameters and may produce local minima, extreme learning machine require setting of one parameter and produce a unique solution. ETM+ multispectral data set (England) was used to judge the suitability of extreme learning machine for remote sensing classifications. A back propagation neural network was used to compare its performance in term of classification accuracy and computational cost. Results suggest that the extreme learning machine perform equally well to back propagation neural network in term of classification accuracy with this data set. The computational cost using extreme learning machine is very small in comparison to back propagation neural network.
description: 6 pages, mapindia 2008 conference
Smart Jamming Attack and Mitigation on Deep Transfer Reinforcement Learning Enabled Resource Allocation for Network Slicing
Creators: name: Salehi, Shavbo
name: Zhou, Hao
name: Elsayed, Medhat
name: Bavand, Majid
name: Gaigalas, Raimundas
name: Ozcan, Yigit
name: Erol-Kantarci, Melike
Publisher: name: arXiv
Year: 2024
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Network slicing is a pivotal paradigm in wireless networks enabling customized services to users and applications. Yet, intelligent jamming attacks threaten the performance of network slicing. In this paper, we focus on the security aspect of network slicing over a deep transfer reinforcement learning (DTRL) enabled scenario. We first demonstrate how a deep reinforcement learning (DRL)-enabled jamming attack exposes potential risks. In particular, the attacker can intelligently jam resource blocks (RBs) reserved for slices by monitoring transmission signals and perturbing the assigned resources. Then, we propose a DRL-driven mitigation model to mitigate the intelligent attacker. Specifically, the defense mechanism generates interference on unallocated RBs where another antenna is used for transmitting powerful signals. This causes the jammer to consider these RBs as allocated RBs and generate interference for those instead of the allocated RBs. The analysis revealed that the intelligent DRL-enabled jamming attack caused a significant 50% degradation in network throughput and 60% increase in latency in comparison with the no-attack scenario. However, with the implemented mitigation measures, we observed 80% improvement in network throughput and 70% reduction in latency in comparison to the under-attack scenario.
Higgs Boson Production from Black Holes at the LHC
Creators: name: Nayak, Gouranga C.
name: Smith, J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: If the fundamental Planck scale is near a TeV, then TeV scale black holes should be produced in proton-proton collisions at the LHC where \sqrt{s} = 14 TeV. As the temperature of the black holes can be ~ 1 TeV we also expect production of Higgs bosons from them via Hawking radiation. This is a different production mode for the Higgs boson, which would normally be produced via direct pQCD parton fusion processes. In this paper we compare total cross sections and transverse momentum distributions dσ/dp_T for Higgs production from black holes at the LHC with those from direct parton fusion processes at next-to-next-to-leading order and next-to-leading order respectively. We find that the Higgs production from black holes can be larger or smaller than the direct pQCD production depending upon the Planck mass and black hole mass. We also find that dσ/dp_T of Higgs production from black holes increases as a function of p_T which is in sharp contrast with the pQCD predictions where dσ/dp_T decreases so we suggest that the measurement of an increase in dσ/dp_T as p_T increases for Higgs (or any other heavy particle) production can be a useful signature for black holes at the LHC.
description: 20 pages latex, 5 figures, To appear in Phys. Rev. D
This isn't your issue : gender and social influence in the public sphere
Creators: name: White, Benjamin Tracy
Publisher: name: The University of Texas at Austin
Year: 2023
Subjects: Gender
Stereotypes
Social media
Political issues

description: Ideally, citizens who express their thoughts have an equal chance of being heard. In reality, social group identities affect our ability to influence others’ attitudes and behavior. Gender is one such identity, and scholars have long observed gendered differences in political expression and influence. This dissertation explores how gendered stereotypes around various political issues shape the influence that women and men can have on others when engaging with politics, and how this affects our own willingness to engage with politics. In chapter one, I discuss the origin of gendered issue stereotypes and form a pair of competing hypotheses about how these stereotypes shape a person’s social influence. I find that women have a modest but significant influence advantage over men when they engage with traditionally masculine issues like crime and the economy. In chapter two, I bring partisanship and race into the equation. I find that partisanship largely overshadows gendered issue stereotypes, but that neither race nor gender more clearly determines influence. In chapter three, I pivot to consider how the threat of gendered issue stereotypes might affect our willingness to engage with politics, and I find that the threat of gendered issue stereotypes depresses men’s political efficacy. Throughout the dissertation, I consider the effects of gendered issue stereotypes in the context of social media, and use primarily survey experiments to test my hypotheses. This dissertation encourages scholars to pay more attention to how gender interacts with politics for everyday people, not just candidates. And while a variety of work suggests that men have greater influence when discussing politics, this dissertation highlights that gender also matters when we engage with specific political issues. In all, gendered issue stereotypes have a meaningful impact on the political experiences of everyday people, and this dissertation offers a valuable first look at the consequences.
Bianchi Type IX M-Branes
Creators: name: Ghezelbash, A. M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present new M2 and M5 brane solutions in M-theory based on transverse self-dual Bianchi type IX space. All the other recently M2 and M5 branes constructed on transverse self-dual Taub-NUT, Egughi-Hanson and Atiyah-Hitchin spaces are special cases of this solution. The solution provides a smooth transition from Eguchi-Hanson type I based M branes to corresponding branes based on Eguchi-Hanson type II space. All the solutions can be reduced down to ten dimensional fully localized intersecting brane configurations.
description: 18 pages, 5 figures, minor changes
Semiclassical reduction for magnetic Schroedinger operator with periodic zero-range potentials and applications
Creators: name: Helffer, Bernard
name: Pankrashkin, Konstantin
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The two-dimensional Schroedinger operator with a uniform magnetic field and a periodic zero-range potential is considered. For weak magnetic fields we reduce the spectral problem to the semiclassical analysis of one-dimensional Harper-like operators. This shows the existence of parts of Cantor structure in the spectrum for special values of the magnetic flux.
description: 31 pages, minor revision (typos corrected, references updated), accepted in Asymptotic Analysis
Modeling of Self-Healing Polymer Composites Reinforced with Nanoporous Glass Fibers
Creators: name: Privman, Vladimir
name: Dementsov, Alexander
name: Sokolov, Igor
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We report on our progress towards continuum rate equation modeling, as well as numerical simulations, of self-healing of fatigue in composites reinforced with glue carrying nanoporous fibers. We conclude that with the proper choice of the material parameters, effects of fatigue can be partially overcome and degradation of mechanical properties can be delayed.
description: 6 pages in PDF
Ambivalent empires : historicising the Trobriand islands, 1830-1945
Creators: name: Connelly, Andrew James
Publisher: name: The Australian National University
Year: 2014

description: This thesis is an exercise in historicising the Trobriands Islands of Papua New Guinea, in recasting the islands beyond the anthropological frame into which they have been conventionally set. This is done through an archival exploration, informed by ten months of historio-ethnographic fieldwork in the islands, of the period from the first direct encounters with Europeans in the 1830s to the Pacific War and its aftermath in the 1940s. I examine in detail the construction of a culture of engagement and exchange in the mid to late 1800s, the first visits of 'discovery' by British New Guinea Administrator William MacGregor, the initial years of the first Christian mission and its leader Samuel Fellows, and the establishment and conduct of resident government under a series of Anglo-Australian officers. I then place the anthropological project alongside these other narratives, highlighting anthropology's own historical role in the construction of a Trobriands visible and desirable to a European gaze, from the accounts and publications of a string of early visitors to the pioneering fieldwork and writings of Bronislaw Malinowski. Throughout these accounts, the conflicts and collusions between Trobrianders and colonial actors are highlighted, as well as the many interconnections amongst the colonial actors themselves, and the prominent role that various Islander intermediaries played in each European endeavour. I finish with a history of the Pacific War in and around the Trobriands and its aftermath, using this as a touchstone for an examination of present-day attitudes towards the past in the islands today. I conclude that Trobriand encounter with the forces of colonialism, Christianity, mercantilism and war have brought manifold transformations to the islands, yet these transformations have always been mediated and managed through an enduring Trobriand agency and sensibility. All parties to the colonial conversation have exhibited ambivalence in various forms, not just to others but also towards their own projects. Yet for all, this ambivalence evolves into nostalgia over time, with long-time European residents becoming 'Trobriandised' and recalling the islands with fondness upon departure, and older Trobrianders today evincing heartfelt nostalgia for the good times of the colonial era. Finally, the present and future implications of continuity and transformation in Trobriand pasts are considered, through one Islander's commentary on 'Trobriand history'.
High-resolution Observations of Small-scale Flux Emergence by GST
Creators: name: Wang, Jiasheng
name: Liu, Chang
name: Cao, Wenda
name: Wang, Haimin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Recent observations demonstrated that emerging flux regions, which constitute the early stage of solar active regions, consist of emergence of numerous small-scale magnetic elements. They in turn interact, merge, and form mature sunspots. However, observations of fine magnetic structures on photosphere with sub-arcsecond resolution are very rare due to limitations of observing facilities. In this work, taking advantage of the high resolution of the 1.6 m Goode Solar Telescope, we jointly analyze vector magnetic fields, continuum images, and Hα observations of NOAA AR 12665 on 2017 July 13, with the goal of understanding the signatures of small-scale flux emergence, as well as their atmospheric responses as they emerge through multiple heights in photosphere and chromosphere. Under such a high resolution of 0.1" to 0.2", our results confirm two kinds of small-scale flux emergence: magnetic flux sheet emergence associated with the newly forming granules, and the traditional magnetic flux loop emergence. With direct imaging in the broadband TiO, we observe that both types of flux emergence are associated with darkening of granular boundaries, while only flux sheets elongate granules along the direction of emerging magnetic fields and expand laterally. With a life span of 10--15 minutes, the total emerged vertical flux is in order of 10$^{18}$ Mx for both types of emergence. The magnitudes of the vertical and horizontal fields are comparable in the flux sheets, while the former is stronger in flux loops. Hα observations reveal transient brightenings in the wings in the events of magnetic loop emergence, which are most probably the signatures of Ellerman bombs.
An holomorphic study of Smarandache automorphic and cross inverse ploperty loops
Creators: name: Jaiyeola, Temitope Gbolahan
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Mathematics (math.GM)
subject: FOS: Mathematics
subject: 20NO5 ; 08A05

description: By studying the holomorphic structure of automorphic inverse property quasigroups and loops[AIPQ and (AIPL)] and cross inverse property quasigroups and loops[CIPQ and (CIPL)], it is established that the holomorph of a loop is a Smarandache; AIPL, CIPL, K-loop, Bruck-loop or Kikkawa-loop if and only if its Smarandache automorphism group is trivial and the loop is itself is a Smarandache; AIPL, CIPL, K-loop, Bruck-loop or Kikkawa-loop.
description: 9 pages
Unfolding recurrence by Green's functions for optimized reservoir computing
Creators: name: Nestler, Sandra
name: Keup, Christian
name: Dahmen, David
name: Gilson, Matthieu
name: Rauhut, Holger
name: Helias, Moritz
Publisher: name: arXiv
Year: 2020
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Machine Learning (stat.ML)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Cortical networks are strongly recurrent, and neurons have intrinsic temporal dynamics. This sets them apart from deep feed-forward networks. Despite the tremendous progress in the application of feed-forward networks and their theoretical understanding, it remains unclear how the interplay of recurrence and non-linearities in recurrent cortical networks contributes to their function. The purpose of this work is to present a solvable recurrent network model that links to feed forward networks. By perturbative methods we transform the time-continuous, recurrent dynamics into an effective feed-forward structure of linear and non-linear temporal kernels. The resulting analytical expressions allow us to build optimal time-series classifiers from random reservoir networks. Firstly, this allows us to optimize not only the readout vectors, but also the input projection, demonstrating a strong potential performance gain. Secondly, the analysis exposes how the second order stimulus statistics is a crucial element that interacts with the non-linearity of the dynamics and boosts performance.
Relating the description of gluon production in pA collisions and parton energy loss in AA collisions
Creators: name: Mehtar-Tani, Yacine
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We calculate the classical gluon field of a fast projectile passing through a dense medium. We show that this allows us to calculate both the initial state gluon production in proton-nucleus collisions and the final state gluon radiation off a hard parton produced in nucleus-nucleus collisions. This unified description of these two phenomena makes the relation between the saturation scale $Q_s$ and the transport coefficient $\hat q$ more transparent. Also, we discuss the validity of the eikonal approximation for gluon propagation inside the nucleus in proton-nucleus collisions at RHIC energy.
description: 18 pages, 3 figures
Unlocking Potential: Integrating Multihop, CRC, and GRAND for Wireless 5G-Beyond/6G Networks
Creators: name: Bozkurt, Bora
name: Zor, Emirhan
name: Yilmaz, Ferkan
Publisher: name: arXiv
Year: 2024
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: As future wireless networks move towards millimeter wave (mmWave) and terahertz (THz) frequencies for 6G, multihop transmission using Integrated Access Backhaul (IABs) and Network-Controlled Repeaters (NCRs) will be highly essential to overcome coverage limitations. This paper examines the use of Guessing Random Additive Noise (GRAND) decoding for multihop transmissions in 3GPP networks. We explore two scenarios: one where only the destination uses GRAND decoding, and another where both relays and the destination leverage it. Interestingly, in the latter scenario, the Bit Error Rate (BER) curves for all hop counts intersect at a specific Signal-to-Noise Ratio (SNR), which we term the GRAND barrier. This finding offers valuable insights for future research and 3GPP standard development. Simulations confirm the effectiveness of GRAND in improving communication speed and quality, contributing to the robustness and interconnectivity of future wireless systems, particularly relevant for the migration towards mmWave and THz bands in 6G networks. Finally, we investigate the integration of multihop transmission, CRC detection, and GRAND decoding within 3GPP networks, demonstrating their potential to overcome coverage limitations and enhance overall network performance.
description: Best Paper Awarded, 6 Pages, 8 Figures, ICCSPA'24 Conference. This work is supported by Istanbul Technical University BAPSIS MAB- 2023-44565 project. The publication is funded by TUBITAK-BILGEM
Water entry of spheres into a rotating liquid
Creators: name: Yi, Lei
name: Li, Shuai
name: Jiang, Hechuan
name: Lohse, Detlef
name: Sun, Chao
name: Mathai, Varghese
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The transient cavity dynamics during water entry of a heavy, non-rotating sphere impacting a rotating pool of liquid is studied experimentally, numerically, and theoretically. We show that the pool rotation advances the transition of the cavity type - from deep seal to surface seal - marked by a reduction in the transitional Froude number. The role of the dimensionless rotational number $\mathcal{S} \equiv ωR_0/U_0$ on the transient cavity dynamics is unveiled, where $R_0$ is the sphere radius, $ω$ the angular speed of the liquid, and $U_0$ the impact velocity. The rotating background liquid has two discernible effects on the cavity evolution. Firstly, an increase in the underwater pressure field due to centripetal effects, and secondly a reduction in the pressure of airflow in the cavity neck near the water surface. The non-dimensional pinch-off time of the deep seal shows a robust 1/2 power-law dependence on the Froude number, but with a reducing prefactor for increasing $ω$. Our findings reveal that the effects of a rotating background liquid on the water entry can be traced back to the subtle differences in the initial stage splash and the near-surface cavity dynamics.
description: 10 pages, 3 figures, Journal of Fluid Mechanics (in press)
Changes in root hair morphogenesis and nodulation of Phaseolus vulgaris L. in the presence of bacillus and rhizobium
Creators: name: Srinivasan, Murali
Publisher: name: University of British Columbia
Year: 2009

description: Twenty two Bacillus spp. isolates from the Phaseolus vulgaris rhizosphere were identified using Biolog™, GC-FAME and 23S rDNA analysis. Some Bacillus isolates produced copious amounts of indoleacetic acid in vitro, in culture medium supplemented with L-tryptophan. Spontaneous cc-methyl tryptophan resistant mutants of Bacillus megaterium S49 exhibited altered IAA production and excreted tryptophan into the culture medium. Coinoculation of Rhizobium etli TAL 182 with some Bacillus spp. under gnotobiotic conditions promoted nodulation of P. vulgaris. In contrast, decreased nodulation was observed in response to low and high lAA-producing Bacillus mutants, suggesting that the nodulation response in bean was not dependent on the in vitro level of IAA production by the Bacillus coinoculant. Coinoculation of Bacillus spp. and Rhizobium spp. resulted in a unique and significant synergistic enhancement of lateral root formation and root hair initiation which was independent of plant host. These observations provided direct evidence for a beneficial interaction on root morphology which may account for enhanced nodulation by creating additional infection sites for the Rhizobium. The presence of live Rhizobium and Bacillus was necessary for the root hair proliferation response. Coinoculation of Rhizobium TAL 182 with cell extracts of Bacillus S49 failed to induce root hair proliferation or enhance nodulation of P. vulgaris. A biologically active Rhizobium TAL 182 was essential for the observed response, indicating that root hair proliferation and enhanced nodulation were direct consequences of the bacterial species interaction. Nodulation and symbiotic specificity of Rhizobium TAL 182 were altered by the presence of Bacillus S49. Split-root experiments showed that coinoculation suppressed host-controlled regulation of nodulation. Bacillus S49 facilitated heterologous nodulation of Rhizobium TAL 182 on P. acutifolius, indicating that a host plant response was also involved in the bacterial interaction. Exogenous aminoethoxy vinyl glycine, a negative regulator of ethylene biosynthesis, inhibited root hair formation in P. vulgaris. These inhibitory effects were reversed by the presence of both Bacillus S49 and Rhizobium TAL 182. The interaction between bacterial species on root hair induction and nodulation patterns in P. vulgaris is discussed.
On the simultaneous recovery of the conductivity and the nonlinear reaction term in a parabolic equation
Creators: name: Kaltenbacher, Barbara
name: Rundell, William
Publisher: name: arXiv
Year: 2021
Subjects: subject: Analysis of PDEs (math.AP)
subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: Primary: 35R30, 65M32, Secondary: 35R11

description: This paper considers the inverse problem of recovering both the unknown, spatially-dependent conductivity $a(x)$ and the nonlinear reaction term $f(u)$ in a reaction-diffusion equation from overposed data. These measurements can consist of: the value of two different solution measurements taken at a later time $T$; time-trace profiles from two solutions; or both final time and time-trace measurements from a single forwards solve data run. We prove both uniqueness results and the convergence of iteration schemes designed to recover these coefficients. The last section of the paper shows numerical reconstructions based on these algorithms.
Quantum mushroom billiards
Creators: name: Barnett, A. H.
name: Betcke, T.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We report the first large-scale statistical study of very high-lying eigenmodes (quantum states) of the mushroom billiard proposed by L. Bunimovich in this journal, vol. 11, 802 (2001). The phase space of this mixed system is unusual in that it has a single regular region and a single chaotic region, and no KAM hierarchy. We verify Percival's conjecture to high accuracy (1.7%). We propose a model for dynamical tunneling and show that it predicts well the chaotic components of predominantly-regular modes. Our model explains our observed density of such superpositions dying as E^{-1/3} (E is the eigenvalue). We compare eigenvalue spacing distributions against Random Matrix Theory expectations, using 16000 odd modes (an order of magnitude more than any existing study). We outline new variants of mesh-free boundary collocation methods which enable us to achieve high accuracy and such high mode numbers orders of magnitude faster than with competing methods.
description: revised, corrected, expanded including new results on dynamical tunneling and level-spacing; 14 pages, 15 figures (4 new), resubmitted to CHAOS
In search of radio emission from exoplanets: GMRT observations of the binary system HD~41004
Creators: name: Narang, Mayank
name: P, Manoj
name: Chandra, C. H. Ishwara
name: Lazio, Joseph
name: Henning, Thomas
name: Tamura, Motohide
name: Mathew, Blesson
name: Ujwal, Nitish
name: Mandal, Pritha
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: This paper reports Giant Metrewave Radio Telescope (GMRT) observations of the binary system HD 41004 that are among the deepest images ever obtained at 150~MHz and 400 MHz in the search for radio emission from exoplanets. The HD 41004 binary system consists of a K1 V primary star and an M2 V secondary; both stars are host to a massive planet or brown dwarf. Analogous to planets in our solar system that emit at radio wavelengths due to their strong magnetic fields, one or both of the planet or brown dwarf in the HD 41004 binary system are also thought to be sources of radio emission. Various models predict HD~41004Bb to have one of the largest expected flux densities at 150 MHz. The observations at 150 MHz cover almost the entire orbital period of HD 41004Bb, and about $20\%$ of the orbit is covered at 400 MHz. We do not detect radio emission, setting 3$σ$ limits of 1.8 mJy at 150 MHz and 0.12 mJy at 400 MHz. We also discuss some of the possible reasons why no radio emission was detected from the HD 41004 binary system.
description: 11 pages, 5 figures, accepted for publication in MNRAS
Effects of the Free Maternal Healthcare Policy on Home Birth in Ghana; the Case of Bekwai Municipality
Creators: name: Affizie, Godwin
Publisher: name: Zenodo
Year: 2024
Subjects: Maternal Health Policy
Maternal Health
Maternal Mortality
Home Birth
Facility Birth

description: This mixed-methods study examines the impact of Ghana's Free Maternal Healthcare Policy on maternal healthcare decisions. Utilizing purposive sampling, 182 participants were included in the quantitative section, and 15 individuals contributed to the qualitative section. The results of the quantitative analysis indicate that an overwhelming majority (98.4%) of respondents opted for facility delivery, demonstrating the policy's efficacy. Only 1.6% of participants reported non-facility births. Access to qualified professionals and emergency care were cited as factors influencing decisions to deliver in a facility, further validated by the qualitative findings. While some individuals continue to rely on traditional methods, community opinions and personal experiences significantly shape choices. The decrease in home deliveries can be largely attributed to the policy. The policy's benefits include improved safety, increased access to prenatal care, and the availability of high-quality medical facilities. The financial burden of healthcare is considered a crucial factor in decision-making. An increasing number of individuals are now choosing skilled healthcare providers over traditional birth attendants. The policy promotes the use of modern medical equipment and contemporary healthcare practices. In conclusion, the Free Maternal Health Policy in Ghana has enhanced the safety, accessibility, and affordability of maternal healthcare services.
Ricci identities in higher dimensions
Creators: name: Ortaggio, Marcello
name: Pravda, Vojtech
name: Pravdova, Alena
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We explore connections between geometrical properties of null congruences and the algebraic structure of the Weyl tensor in n>4 spacetime dimensions. First, we present the full set of Ricci identities on a suitable "null" frame, thus completing the extension of the Newman-Penrose formalism to higher dimensions. Then we specialize to geodetic null congruences and study specific consequences of the Sachs equations. These imply, for example, that Kundt spacetimes are of type II or more special (like for n=4) and that for odd n a twisting geodetic WAND must also be shearing (in contrast to the case n=4).
description: 8 pages. v2: typo corrected between Propositions 2 and 3. v3: typo in the last term in the first line of (11f) corrected, missing term on the r.h.s. of (11p) added, first sentence between Propositions 2 and 3 slightly changed
Efficient simulation of controlled large quantum systems
Creators: name: Hush, Michael Robert
Publisher: name: The Australian National University
Year: 2018
Subjects: subject: QC174.12.H87 2012
subject: Quantum theory
subject: Control theory
subject: Bose-Einstein condensation

description: Engineers are looking to produce technologies that exploit the full quantum nature of a system, including quantum computing, quantum communication and quantum metrol- ogy. Quantum control allows engineers to modify the behaviour of the full quantum state of a system, which will be an important part of making these technologies commercially viable. If these technologies are to be competitive, they must be scaled up to large sizes. We produce a novel toolset which can be used to simulate large con- trolled quantum systems efficiently. We target this toolset at a large quantum system that can immediately benefit: Bose-Einstein Condensates (BECs). We first develop the Controlled Fokker-Planck Equation (CFPE), which allows scalable simulation of a controlled BEC. We find using coherent-state-based methods to generate a CFPE produces solutions with severely limited integration times, as monitoring of a BEC is intrinsically involves continuous 'number-like' measurements. To solve this problem, we develop a novel representation based on number state which acts in harmony with the measurement: the Number-Phase Wigner (NPW) representation. The NPW method efficiently and accurately simulates controlled BECs. It converges over 4 orders of mag- nitude longer than its closest coherent-state-based competitor. Using the NPW we are able to perform the first full-field analysis of a BEC under a cooling feedback control. We find that quantum noise produces heating in BECs that was not previously pre- dicted using approximate methods. We remove the effects of quantum noise with the creation of a novel control.
Electron Density Dependence of in-plane Spin Relaxation Anisotropy in GaAs/AlGaAs Two-Dimensional Electron Gas
Creators: name: Liu, Baoli
name: Zhao, Hongming
name: Wang, Jia
name: Liu, Linsheng
name: Wang, Wenxin
name: Zhu, Haijun
name: Chen, Dongmin
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigated the spin dynamics of two-dimensional electrons in (001) GaAs/AlGaAs heterostructure using the time resolved Kerr rotation technique under a transverse magnetic field. The in-plane spin lifetime is found to be anisotropic below 150k due to the interference of Rashba and Dresselhaus spin-orbit coupling and D'yakonov-Perel' spin relaxation. The ratio of in-plane spin lifetimes is measured directly as a function of temperature and pump power, showing that the electron density in 2DEG channel strongly affects the Rashba spin-orbit coupling.
description: 3 pages, 2 figures
Population III Star Formation in a Lambda WDM Universe
Creators: name: O'Shea, Brian W.
name: Norman, Michael L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In this paper we examine aspects of primordial star formation in a gravitino warm dark matter universe with a cosmological constant. We compare a set of simulations using a single cosmological realization but with a wide range of warm dark matter particle masses which have not yet been conclusively ruled out by observations. The addition of a warm dark matter component to the initial power spectrum results in a delay in the collapse of high density gas at the center of the most massive halo in the simulation and, as a result, an increase in the virial mass of this halo at the onset of baryon collapse. Both of these effects become more pronounced as the warm dark matter particle mass becomes smaller. A cosmology using a gravitino warm dark matter power spectrum assuming a particle mass of m_{WDM} ~ 40keV is effectively indistinguishable from the cold dark matter case, whereas the m_{WDM} ~ 15 keV case delays star formation by approx. 10^8 years. There is remarkably little scatter between simulations in the final properties of the primordial protostar which forms at the center of the halo, possibly due to the overall low rate of halo mergers which is a result of the WDM power spectrum. The detailed evolution of the collapsing halo core in two representative WDM cosmologies is described. At low densities (n_{b} <= 10^5 cm^{-3}), the evolution of the two calculations is qualitatively similar, but occurs on significantly different timescales, with the halo in the lower particle mass calculation taking much longer to evolve over the same density range and reach runaway collapse. Once the gas in the center of the halo reaches relatively high densities (n_{b} >= 10^5 cm^{-3}) the overall evolution is essentially identical in the two calculations.
description: 36 pages, 12 figures (3 color). Astrophysical Journal, accepted
Commensurability Effects at Nonmatching Fields for Vortices in Diluted Periodic Pinning Arrays
Creators: name: Reichhardt, C.
name: Reichhardt, C. J. Olson
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Using numerical simulations, we demonstrate that superconductors containing periodic pinning arrays which have been diluted through random removal of a fraction of the pins have pronounced commensurability effects at the same magnetic field strength as undiluted pinning arrays. The commensuration can occur at fields significantly higher than the matching field, produces much greater critical current enhancement than a random pinning arrangement due to suppresion of vortex channeling, and persists for arrays with up to 90% dilution. These results suggest that diluted periodic pinning arrays may be a promising geometry to increase the critical current in superconductors over a wide magnetic field range.
description: 6 pages, 5 postscript figures. Version to appear in Phys. Rev. B
Dark Energy and Cosmological Horizon Thermal Effects
Creators: name: Astashenok, Artyom V.
name: Odintsov, Sergei D.
name: Oikonomou, Vasilis K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigate various dark energy models by taking into account the thermal effects induced from Hawking radiation on the apparent horizon of the Universe, for example near a finite-time future singularity. If the dark energy density increases as the Universe expands, the Universe's evolution reaches a singularity of II type (or sudden future singularity). The second derivative of scale factor diverges but the first remains finite. Quasi-de Sitter evolution can change on sudden future singularity in the case of having an effective cosmological constant larger than the maximum possible value of the energy density of the Universe. Another interesting feature of cosmological solution is the possibility of a transition between deceleration and acceleration for quintessence dark energy with a simple equation of state. Finally, we investigate which fluid component can remedy Big Rip singularities and other crushing type singularities.
description: 15 pp., 7 figs., to appear in Phys. Rev. D