cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Learned Image Coding for Machines: A Content-Adaptive Approach
Creators: name: Le, Nam
name: Zhang, Honglei
name: Cricri, Francesco
name: Ghaznavi-Youvalari, Ramin
name: Tavakoli, Hamed Rezazadegan
name: Rahtu, Esa
Publisher: name: arXiv
Year: 2021
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Today, according to the Cisco Annual Internet Report (2018-2023), the fastest-growing category of Internet traffic is machine-to-machine communication. In particular, machine-to-machine communication of images and videos represents a new challenge and opens up new perspectives in the context of data compression. One possible solution approach consists of adapting current human-targeted image and video coding standards to the use case of machine consumption. Another approach consists of developing completely new compression paradigms and architectures for machine-to-machine communications. In this paper, we focus on image compression and present an inference-time content-adaptive finetuning scheme that optimizes the latent representation of an end-to-end learned image codec, aimed at improving the compression efficiency for machine-consumption. The conducted experiments show that our online finetuning brings an average bitrate saving (BD-rate) of -3.66% with respect to our pretrained image codec. In particular, at low bitrate points, our proposed method results in a significant bitrate saving of -9.85%. Overall, our pretrained-and-then-finetuned system achieves -30.54% BD-rate over the state-of-the-art image/video codec Versatile Video Coding (VVC).
description: Fig 4 correction
Embedded software developments in KM3NeT phase I
Creators: name: van Beveren, V.
name: Real, D.
name: Chiarusi, T.
name: Calvo, D.
name: Mastroianni, S.
name: Musico, P.
name: Pellegrini, G.
name: Jansweijer, P.
name: Colonges, S.
name: Bozza, C.
name: Filippini, F.
name: Nicolau, C.
name: Díaz, A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The KM3NeT Collaboration has already produced more than one thousand acquisition boards, used for building two deep-sea neutrino detectors at the bottom of the Mediterranean Sea, with the aim of instrumenting a volume of several cubic kilometers with light sensors to detect the Cherenkov radiation produced in neutrino interactions. The the so-called Digital Optical Modules, house the PMTs and the acquisition and control electronics of the module, the Central Logic Board, which includes a Xilinx FPGA and embedded soft processor. The present work presents the architecture and functionalities of the software embedded in the soft processor of the Central Logic Board.
description: 5 pages (5 excluding references), 1 figure. VLVnT2021 proceeding contribution
The sign of electron g-factor in GaAs(1-x)N(x) measured by using the Hanle effect
Creators: name: Kalevich, V. K.
name: Ivchenko, E. L.
name: Shiryaev, A. Yu.
name: Afanasiev, M. M.
name: Egorov, A. Yu.
name: Ikezawa, M.
name: Masumoto, Y.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Positive signs of the effective g-factors for free electrons in the conduction band and electrons localized on deep paramagnetic centers have been measured in nitrogen dilute alloy GaAs{0.979}N{0.021} at room temperature. The g-factor signs have been determined from an asymmetry in the depolarization of edge photoluminescence in a transverse magnetic field (Hanle effect) at the oblique incidence of the exciting radiation and oblique-angle detection of the luminescence. The tilted spin polarization of free electrons is induced under interband absorption of circularly polarized light, and the paramagnetic centers acquire spin polarization because of spin-dependent capture of free spin-polarized electrons by these centers. The measured Hanle curve is a superposition of two lines, narrow and broad, with the widths ~400 G and ~50000 G, arising due to the depolarization of localized and free electrons, respectively. The magnitude and direction of the asymmetry in the measured Hanle curve have been found to depend on the partial contributions to the photoluminecsence from the heavy- and light-hole subbands split by a uniaxial deformation of the GaAs{1-x}N{x} film grown on a GaAs substrate. We have extended the theory of optical orientation in order to calculate the excitation spectrum of the photoelectron tilted-spin polarization and the circularly-polarized luminescence spectrum taking into account that, in the strained samples under study, the light-hole subband lies above the heavy-hole one. The results have further been used to calculate the shape of Hanle curve as a function of the excitation and registration energies as well as the incidence and detection angles and to compare the theory with experiment.
description: 20 pages with 9 figures, submitted to Semiconductor Science and Technology special issue on Optical Orientation
Studies of EGRET sources with a novel image restoration technique
Creators: name: Tajima, Hiroyasu
name: Finazzi, Stefano
name: Cohen-Tanugi, Johann
name: Chiang, James
name: Kamae, Tuneyoshi
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have developed an image restoration technique based on the Richardson-Lucy algorithm optimized for GLAST-LAT image analysis. Our algorithm is original since it utilizes the PSF (point spread function) that is calculated for each event. This is critical for EGRET and GLAST-LAT image analysis since the PSF depends on the energy and angle of incident gamma-rays and varies by more than one order of magnitude. EGRET and GLAST-LAT image analysis also faces Poisson noise due to low photon statistics. Our technique incorporates wavelet filtering to minimize noise effects. We present studies of EGRET sources using this novel image restoration technique for possible identification of extended gamma-ray sources.
description: 5 pages, 3 figures. Presented at First GLAST Symposium, Stanford University, Stanford, CA, USA, February 5-8, 2007
Magnetic Interaction in the Geometrically Frustrated Triangular Lattice Antiferromagnet $\rm CuFeO_2$
Creators: name: Ye, F.
name: Fernandez-Baca, J. A.
name: Fishman, R. S.
name: Ren, Y.
name: Kang, H. J.
name: Qiu, Y.
name: Kimura, T.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The spin wave excitations of the geometrically frustrated triangular lattice antiferromagnet (TLA) $\rm CuFeO_2$ have been measured using high resolution inelastic neutron scattering. Antiferromagnetic interactions up to third nearest neighbors in the ab plane (J_1, J_2, J_3, with $J_2/J_1 \approx 0.44$ and $J_3/J_1 \approx 0.57$), as well as out-of-plane coupling (J_z, with $J_z/J_1 \approx 0.29$) are required to describe the spin wave dispersion relations, indicating a three dimensional character of the magnetic interactions. Two energy dips in the spin wave dispersion occur at the incommensurate wavevectors associated with multiferroic phase, and can be interpreted as dynamic precursors to the magnetoelectric behavior in this system.
description: 4 pages, 4 figures, published in Phys. Rev. Lett
Virasoro constraints for Kontsevich-Hurwitz partition function
Creators: name: Mironov, A.
name: Morozov, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Algebraic Geometry (math.AG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: M.Kazarian and S.Lando found a 1-parametric interpolation between Kontsevich and Hurwitz partition functions, which entirely lies within the space of KP tau-functions. V.Bouchard and M.Marino suggested that this interpolation satisfies some deformed Virasoro constraints. However, they described the constraints in a somewhat sophisticated form of AMM-Eynard equations for the rather involved Lambert spectral curve. Here we present the relevant family of Virasoro constraints explicitly. They differ from the conventional continuous Virasoro constraints in the simplest possible way: by a constant shift u^2/24 of the L_{-1} operator, where u is an interpolation parameter between Kontsevich and Hurwitz models. This trivial modification of the string equation gives rise to the entire deformation which is a conjugation of the Virasoro constraints L_m -> U L_m U^{-1} and "twists" the partition function, Z_{KH}= U Z_K. The conjugation U is expressed through the previously unnoticed operators which annihilate the quasiclassical (planar) free energy of the Kontsevich model, but do not belong to the symmetry group GL(\infty) of the universal Grassmannian.
description: 36 pages
A Systematic Investigation of the Coupling between One-Dimensional Edge States of a Topological Crystalline Insulator
Creators: name: Jung, Johannes
name: Odobesko, Artem
name: Boshuis, Robin
name: Szczerbakow, Andrzej
name: Story, Tomasz
name: Bode1, Matthias
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The interaction of spin-polarized one-dimensional (1D) topological edge modes localized along single-atomic steps of the topological crystalline insulator $Pb_{0.7}Sn_{0.3}Se(001)$ has been studied systematically by scanning tunneling spectroscopy. Our results reveal that the coupling of adjacent edge modes sets in at a step{to{step distance $d_{ss} < 25$ nm, resulting in a characteristic splitting of a single peak at the Dirac point in tunneling spectra. Whereas the energy splitting exponentially increases with decreasing $d_{ss}$ for single-atomic steps running almost parallel, we find no splitting for single-atomic step edges under an angle of $90^{o}$. The results are discussed in terms of overlapping wave functions with $p_x; p_y$ orbital character.
description: 6 pages, 3 figures
Time reversal Aharonov-Casher effect in mesoscopic rings with Rashba spin-orbital interaction
Creators: name: Zhu, Zhenyue
name: Wang, Yong
name: Xia, Ke
name: Xie, X. C.
name: Ma, Zhongshui
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The time reversal Aharonov-Casher (AC) interference effect in the mesoscopic ring structures, based on the experiment in Phys. Rev. Lett. \textbf{97}, 196803 (2006), is studied theoretically. The transmission curves are calculated from the scattering matrix formalism, and the time reversal AC interference frequency is singled out from the Fourier spectra in numerical simulations. This frequency is in good agreement with analytical result. It is also shown that in the absent of magnetic field, the Altshuler-Aronov-Spivak type (time reversal) AC interference retains under the influence of strong disorder, while the Aharonov-Bohm type AC interference is suppressed.
description: 5 pages, 4 figures, accepted by Phys. Rev. B
On the Performance of Selection Relaying
Creators: name: Adinoyi, Abdulkareem
name: Fan, Yijia
name: Yanikomeroglu, Halim
name: Poor, H. Vincent
Publisher: name: arXiv
Year: 2008
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: Interest in selection relaying is growing. The recent developments in this area have largely focused on information theoretic analyses such as outage performance. Some of these analyses are accurate only at high SNR regimes. In this paper error rate analyses that are sufficiently accurate over a wide range of SNR regimes are provided. The motivations for this work are that practical systems operate at far lower SNR values than those supported by the high SNR analysis. To enable designers to make informed decisions regarding network design and deployment, it is imperative that system performance is evaluated with a reasonable degree of accuracy over practical SNR regimes. Simulations have been used to corroborate the analytical results, as close agreement between the two is observed.
description: Proceedings of the 2008 IEEE Vehicular Technology Conference, Calgary, Alberta, September 21-24, 2008
Interface-driven magnetocapacitance in a broad range of materials
Creators: name: Maglione, Mario
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Triggered by the revival of multiferroic materials, a lot of effort is presently undergoing as to find a coupling between a capacitance and a magnetic field. We show in this report that interfaces are the right way of increasing such a coupling provided free charges are localized on these two-dimensional defects. Starting from commercial diodes at room temperature and going to grain boundaries in giant permittivity materials and to ferroelectric domain walls, a clear magnetocapacitance is reported which is all the time more than a few percent for a magnetic field of 90kOe. The only tuning parameter for such strong coupling to arise is the dielectric relaxation time which is reached on tuning the operating frequency and the temperature in many different materials.
A manifold learning perspective on representation learning: Learning decoder and representations without an encoder
Creators: name: Schuster, Viktoria
name: Krogh, Anders
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Autoencoders are commonly used in representation learning. They consist of an encoder and a decoder, which provide a straightforward way to map n-dimensional data in input space to a lower m-dimensional representation space and back. The decoder itself defines an m-dimensional manifold in input space. Inspired by manifold learning, we show that the decoder can be trained on its own by learning the representations of the training samples along with the decoder weights using gradient descent. A sum-of-squares loss then corresponds to optimizing the manifold to have the smallest Euclidean distance to the training samples, and similarly for other loss functions. We derive expressions for the number of samples needed to specify the encoder and decoder and show that the decoder generally requires much less training samples to be well-specified compared to the encoder. We discuss training of autoencoders in this perspective and relate to previous work in the field that use noisy training examples and other types of regularization. On the natural image data sets MNIST and CIFAR10, we demonstrate that the decoder is much better suited to learn a low-dimensional representation, especially when trained on small data sets. Using simulated gene regulatory data, we further show that the decoder alone leads to better generalization and meaningful representations. Our approach of training the decoder alone facilitates representation learning even on small data sets and can lead to improved training of autoencoders. We hope that the simple analyses presented will also contribute to an improved conceptual understanding of representation learning.
Diet Soda and Liquid Nitrogen
Creators: name: McGuyer, Bart H.
name: Brown, Justin M.
name: Dang, Hoan B.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Physics Education (physics.ed-ph)
subject: FOS: Physical sciences

description: Letter to the Editor about how the diet soda and Mentos reaction can be produced by the direct immersion of a plastic soda bottle in liquid nitrogen.
description: 1 page
Measurements in QFT: Weakly coupled local particle detectors and entanglement harvesting
Creators: name: Grimmer, Daniel
name: Torres, Bruno de S. L.
name: Martín-Martínez, Eduardo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present a comparison of the AQFT-based Fewster-Verch framework with the Unruh-DeWitt particle detector models commonly employed in relativistic quantum information and QFT in curved space. We use this comparison to respond to a recent paper [arXiv:2103.13400] in which it was argued that the Reeh-Schlieder theorem prevents weakly coupled local particle detectors from harvesting vacuum entanglement from a quantum field. Their claim can be traced back to the mixedness that a local particle detector cannot escape from because of the entanglement that it must have with the quantum fields outside of the localization area. We argue that for any realistic scale of localization for physical particle detectors the effect of that mixedness is negligible, and that weakly coupled localized particle detectors are not impeded from harvesting vacuum entanglement.
description: 28 pages, 7 Figures. RevTeX 4.2. v2 updated to match published version (including updated title)
IKT16: Discovery of a 22 ms energetic rotation-powered pulsar in the Small Magellanic Cloud
Creators: name: Maitra, C.
name: Esposito, P.
name: Tiengo, A.
name: Ballet, J.
name: Haberl, F.
name: Dai, S.
name: Filipovic, M. D.
name: Pilia, M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report here on the discovery with XMM-Newton of pulsations at 22 ms from the central compact source associated with IKT16, a supernova remnant in the Small Magellanic Cloud (SMC). The measured spin period and spin period derivative correspond to 21.7661076(2) ms and $2.9(3)\times10^{-14}$ s,s$^{-1}$, respectively. Assuming standard spin-down by magnetic dipole radiation, the spin-down power corresponds to $1.1\times10^{38}$,erg,s$^{-1}$ implying a Crab-like pulsar. This makes it the most energetic pulsar discovered in the SMC so far and a close analogue of PSR J0537--6910, a Crab-like pulsar in the Large Magellanic Cloud. The characteristic age of the pulsar is 12 kyr. Having for the first time a period measure for this source, we also searched for the signal in archival data collected in radio with the Parkes telescope and in Gamma-rays with the Fermi/LAT, but no evidence for pulsation was found in these energy bands.
description: 5 pages, 4 figures, 2 tables. Accepted for publication in MNRAS Letters
La comunicazione e la democrazia. Politica ed informazione nel sistema democratico
Creators: name: Salvato, Maria Grazia
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2010

description: Il presente lavoro di ricerca tenta di approfondire i reali rapporti esistenti tra politica, comunicazione e democrazia nell’era digitale, analizzando nel dettaglio i principali mezzi di comunicazione di massa (televisione, stampa, Internet) e il loro mutuo rapporto, partendo dall’assunto dell’importanza della comunicazione come strumento essenziale per l’esistenza della democrazia stessa.
La ricerca propone un’analisi storica delle condizioni e dei problemi del sistema dell’informazione in Italia, in una prospettiva di integrazione europea, alle soglie della rivoluzione digitale: dalla sorte della carta stampata e dal futuro della televisione e di Internet dipenderà la sopravvivenza di un requisito fondamentale per la democrazia, ovvero la possibilità per i cittadini di formarsi delle proprie idee e valutazioni, nonché di partecipare al processo decisionale con cognizione di causa e libertà di giudizio. Motivo per riflettere sui percorsi e le componenti del nostro sistema dei media per cercare di comprendere meglio lo stretto intreccio tra politica e comunicazione in democrazia, con particolare riferimento al principio del pluralismo sotto il profilo storico, attraverso l’opera del legislatore, la giurisprudenza ed il contesto sociale in cui esse si inseriscono, in chiave nazionale e comunitaria, e al rapporto tra mondo della comunicazione e le nuove tecnologie, con tutte le potenzialità che l’era digitale offre ma che ancora non vengono sfruttate appieno.
SCRIPT - For the Fallen
Creators: name: Newall, Helen
name: Baker, Matt
Publisher: name: Edge Hill University
Year: 2021
Subjects: subject: 190402 Creative Writing (incl. Playwriting)
subject: FOS: Arts (arts, history of arts, performing arts, music)
subject: 190404 Drama, Theatre and Performance Studies

description: For the Fallen is a montage work weaving live spoken narrative from verbatim sources, vocal choral work, digital soundscapes, and animated portraits of soldiers' images with a Requiem Mass and songs contemporary to the WWI era. It was performed live by a community choir of 42 singers, and the youth theatre cast of 14.
This montage style of writing and production was also used in TiQ's award winning work Over By Christmas (2014). The verbatim narratives and characters depicted come from objects, documents, diaries and images unearthed in Cheshire's Great War Stories Project, Chester History and Heritage Centre Roadshow, 2013+, in which the public brought in World War I 'attic' artifacts to be logged in a database now held in the Grosvenor Museum, Chester.
The theme of For the Fallen was these artifacts, as well as the histories that they tell, and it marks the moment that living memory passes into history, something which the inter-generational aspect of the performers has highlighted, and which inspired a sharing of the cast and crew's own family stories of the Great War.
The work was staged in and all around the audience who were seated on individually placed chairs. It was staged to use the church architecture of St Mary's Creative Space (stone pillars; the raised stone dais; the carved screen over the church porch entrance) and the history of the building as a sacred space at times informed a shift from audience to commemorative congregation. The work sold out over two nights. A question and answer session was held after each performance.
Statistical mechanics of genome regulation: the case of X chromosome inactivation
Creators: name: Scialdone, Antonio
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2010

description: The aim of my PhD research project was to discover the mechanisms behind X Chromosome Inactivation (XCI) one of the most
intriguing issues of the current mammalian Biology.  XCI is the process whereby a female mammal cell silences one of its two X chromosomes randomly chosen, to equalize the dosage of X products with respect to males (having just one X). We used theoretical models from Statistical Physics and their massive computer simulations to dissect this chromosome-wide stochastic regulatory process.
The importance of these investigations goes beyond the XCI, as the comprehension of this process, can indeed shed light on a whole class of regulatory mechanisms involving the genome.
By means of our quantitive models, which already found some important experimental confirmations, we were able to provide a new deeper level of understanding of the underlying physical and molecular mechanisms. Precise predictions are given for many genetic/chemical manipulations and a new generation of experiments can be designed. A close interplay between theory and experiments, was guaranteed in our project by the collaboration with an experimental group from Harvard Medical School, USA.
CIVITATES SPOLIATAE. RECUPERO E RIUSO DELL’ANTICO IN CAMPANIA TRA L’ETÀ POST-CLASSICA E IL MEDIOEVO (IV-XV SEC.)
Creators: name: Palmentieri, Angela
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2010

description: This work examines how Roman marble were reused into religious and civil buildings beetween the IVth-Xth / XIth-XVth centuries in some centers of Campania. The aims of this research were threefold: I. to establish a corpus around the spolia of old centers of Campania. II. to consider the problem of continuity and the revival of the past in new buildings through the codification of new religious and politic aesthetic. III. to demonstrate the origin of spolia from ancient centers of Campania and not only from Lazio’ centers. The evidence of some unpublished materials (as sarcophagi and capitals), preserved mainly in local Museums, or reused in Medieval Churches and in the streets of cities, contribute to better delineate our knowledges about Campania spolia, before known from authoritative studies on the subject. The use of spolia in Campania is interesting to understand the survival of the ancient Roman society of Campania during the Longobard and Norman dominations. We can also describe the difference between the reuse of earlier building materials or decorative sculpture on new momuments in South and North Campania, looking at the spolia found in Capua (for example, coming from the marbles of the Amphitheatre or Theatre in Santa Maria Capua Vetere), Sessa Aurunca and Teano and Salerno-Amalfi’ coast. The origins of spolia are from imperial-roman Theatre and Amphitheatre very rich in marble to be reused, from imperial necropolis of republican centers of Campania, restored by Traiano and Adriano emperors, but also from important villae around Naples and Flegrean Bay. In the Medieval age, the coastal cities acquire the materials through maritime trade: from Paestum to Salerno-Amalfi to Naples-Pozzuoli-Ostia-Roma, but also through regional routes: Nuceria-Capua-Benevento, full of roman spolia.
Development of a new wideband heterodyne receiver system for the Osaka 1.85-m mm-submm telescope -- Receiver development & the first light of simultaneous observation in 230GHz and 345GHz bands with an SIS-mixer with 4-21GHz IF output
Creators: name: Masui, Sho
name: Yamasaki, Yasumasa
name: Ogawa, Hideo
name: Kondo, Hiroshi
name: Yokoyama, Koki
name: Matsumoto, Takeru
name: Minami, Taisei
name: Okawa, Masanari
name: Konishi, Ryotaro
name: Kawashita, Sana
name: Konishi, Ayu
name: Nakao, Yuka
name: Nishimoto, Shimpei
name: Yoneyama, Sho
name: Ueda, Shota
name: Hasegawa, Yutaka
name: Fujita, Shinji
name: Nishimura, Atsushi
name: Kojima, Takafumi
name: Uemizu, Kazunori
name: Kaneko, Keiko
name: Sakai, Ryo
name: Gonzalez, Alvaro
name: Uzawa, Yoshinori
name: Onishi, Toshikazu
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We have developed a wideband receiver system for simultaneous observations in CO lines of J = 2-1 and J = 3-2 transitions using the Osaka 1.85-m mm-submm telescope. As a frequency separation system, we developed multiplexers that connect three types of diplexers, each consisting of branch-line couplers and high-pass filters. The radio frequency (RF) signal is eventually distributed into four frequency bands, each of which is fed to a superconductor-insulator-superconductor (SIS) mixer. The RF signal from the horn is divided into two frequency bands by a wideband diplexer with a fractional bandwidth of 56%, and then each frequency band is further divided into two bands by each diplexer. The developed multiplexers were designed, fabricated, and characterized using a vector network analyzer. The measurement results showed good agreement with the simulation. The receiver noise temperature was measured by connecting the SIS-mixers, one of which has a wideband 4-21GHz intermediate frequency (IF) output. The receiver noise temperatures were measured to be ~70K in the 220GHz band, ~100K in the 230GHz band, 110-175K in the 330GHz band, and 150-250K in the 345GHz band. This receiver system has been installed on the 1.85-m telescope at the Nobeyama Radio Observatory. We succeeded in the simultaneous observations of six CO isotopologue lines with the transitions of J = 2-1 and J = 3-2 toward the Orion KL as well as the on-the-fly (OTF) mappings toward the Orion KL and W 51.
description: 26pages, 20 figures, Accepted for publication in PASJ
Emerging nonlinear Hall effect in Kane-Mele two-dimensional topological insulators
Creators: name: Malla, Rajesh K.
name: Saxena, Avadh
name: Kort-Kamp, Wilton J. M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The recent observations of nonlinear Hall effect in time-reversal symmetry protected systems and on the surface of three-dimensional topological insulators due to an in-plane magnetic field have attracted immense experimental and theoretical investigations in two-dimensional transition metal dichalcogenides and Weyl semimetals. The origin of this type of second order effect has been attributed to the emergence of a Berry curvature dipole, which requires a low-symmetry environment. Here, we propose a mechanism for generating such a second order nonlinear Hall effect in Kane-Mele two-dimensional topological insulators due to spatial and time reversal symmetry breaking in the presence of Zeeman and Rashba couplings. By actively tuning the energy gaps with external electromagnetic fields we also demonstrate that the nonlinear Hall effect shows remarkable signatures of topological phase transitions existing in the considered two-dimensional systems.
description: 12 pages, 6 figures
Mobilità, speciazione e fitodisponibilità di arsenico nel sistema suolo-acqua-pianta
Creators: name: De Santis, Roberto Maria
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2010

description: L’adsorbimento ed il desorbimento dell’arsenico su e da diversi componenti del suolo può avere un ruolo importante nel regolare la mobilità dell’elemento negli ambienti naturali (suoli, sedimenti, acque).
Al fine di studiare i rischi legati all’assunzione dell’arsenico mediante ingestione di acque e/o alimenti contaminati, sono stati studiati i fattori che influenzano la mobilita e la potenziale tossicità dell’ arsenico nel sistema suolo- acqua - pianta. In particolare sono stato studiati, attraverso un approccio modellistico, i fattori che regolano l’adsorbimento di entrambe le forme inorganiche dell’arsenico (As III ed As V) su un ossido di ferro a scarso ordine cristallino (ferridrite Fe2O3 x n H2O) e su un ossido di alluminio amorfo in
presenza di anioni inorganici (fosfato solfato, seleniato e selenito) e organici (malato, ossalato citrato e tartrato), presenti naturalmente in natura. Un altro aspetto del lavoro di tesi è stato quello di valutare l’assorbimento di arsenico da parte di piante di interesse alimentare (Cichorum endivia e Zea mays) coltivate su suoli naturalmente inquinati dal metalloide, campionati a Scarlino (Grosseto). Attraverso questa prova è stata testata la capacità della concimazione fosfatica e dei funghi micorrizici arbuscolari (FMA) nell’aumentare la tolleranza della pianta ospite alle condizioni di tossicità dovute dalla presenza del metalloide.  Per quanto riguarda la prova sperimentale su Zea mays particolare cura è stata posta nella determinazione nei diversi strati della rizosfera delle varie specie dell’arsenico e della frazione biodisponibile del metalloide attraverso l’uso di campionatori passivi DGT ( Diffusive gradient in thin film) . Le piante sono state cresciute in particolari dispositivi (rhizobox), i quali consentono attraverso l’uso di apparecchiature idonee il campionamento meticoloso del suolo rizosferico.
Implementing a magnonic time-delay reservoir computer model
Creators: name: Watt, Stuart
name: Kostylev, Mikhail
name: Ustinov, Alexey B.
name: Kalinikos, Boris A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Applied Physics (physics.app-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Recently we demonstrated experimentally that microwave oscillators based on the time delay feedback provided by traveling spin waves could operate as reservoir computers. In the present paper, we extend this concept by adding the feature of time multiplexing made available by the large propagation times/distances of traveling spin waves. The system utilizes the nonlinear behavior of propagating magnetostatic surface spin waves in a yttrium-iron garnet thin film and the time delay inherent in the active ring configuration to process time dependent data streams. Higher reservoir dimensionality is obtained through the time-multiplexing method, emulating "virtual" neurons as temporally separated spin-wave pulses circulating in the active ring below the auto-oscillation threshold. To demonstrate the efficacy of the concept, the active ring reservoir computer is evaluated on the short-term memory and parity check benchmark tasks, and the physical system parameters are tuned to optimize performance. By incorporating a reference line to mix the input signal directly onto the active ring output, both the amplitude and phase nonlinearity of the spin waves can be exploited, resulting in significant improvement on the nonlinear parity check task. We also find that the fading memory capacity of the system can be easily tuned by controlling the active ring gain. Finally, we show that the addition of a second spin-wave delay line configured to transmit backward volume spin waves can partly compensate dispersive pulse broadening and enhance the fading memory capacity of the active ring.
description: 14 pages, 7 figures
Suzaku wide-band X-ray Spectroscopy of the Seyfert 2 AGN in NGC 4945
Creators: name: Itoh, Takeshi
name: Done, Chris
name: Makishima, Kazuo
name: Madejski, Grzegorz
name: Awaki, Hisamitsu
name: Isobe, Naoki
name: Gandhi, Poshak
name: Dewangan, Gulab C.
name: Griffiths, Richard E.
name: Anabuki, Naohisa
name: Okajima, Takashi
name: Reeves, James
name: Takahashi, Tadayuki
name: Ueda, Yoshihiro
name: Eguchi, Satohi
name: Yaqoob, Tahir
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Suzaku observed a nearby Seyfert 2 galaxy NGC4945, which hosts one of the brightest active galactic nuclei above 20 keV. Combining data from the X-ray CCD camera (XIS) and the Hard X-ray Detector (HXD), the AGN intrinsic nuclear emission and its reprocessed signals were observed simultaneously. The intrinsic emission is highly obscured with an absorbing column of $\sim 5 \times 10^{24}$ cm$^{-2}$, and was detectable only above $\sim 10$ keV. The spectrum below 10 keV is dominated by reflection continuum and emission lines from neutral/ionized material. Along with a neutral iron K$α$ line, a neutral iron K$β$ and a neutral nickel K$α$ line were detected for the first time from this source. The neutral lines and the cold reflection continuum are consistent with both originating in the same location. The Compton down-scattered shoulder in the neutral Fe-K$α$ line is $\sim 10%$ in flux of the narrow core, which confirms that the line originates from reflection rather than transmission. The weakness of the Compton shoulder also indicates that the reflector is probably seen nearly edge-on. Flux of the intrinsic emission varied by a factor of $\sim 2$ within $\sim 20$ ks, which requires the obscuring material to be geometrically thin. Broadband spectral modeling showed that the solid angle of the neutral reflector is less than a few $\times 10^{-2} \times 2π$. All this evidence regarding the reprocessed signals suggests that a disk-like absorber/reflector is viewed from a near edge-on angle.
description: 11 pages, 11 figures
The X-ray spectral and variability properties of typical radio-loud quasars
Creators: name: Zhu, Shifu
name: Timlin, John
name: Brandt, W. N.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present X-ray spectral and long-term variability analyses of an unbiased sample of 361 optically selected radio-loud quasars (RLQs) utilizing sensitive serendipitous X-ray data from the Chandra and XMM-Newton archives. The spectral and temporal properties of RLQs are compared with those of radio-quiet quasars (RQQs) matched in $L_\mathrm{2500A}$ and $z$. The median power-law photon index ($Γ$) of RLQs is $1.84^{+0.01}_{-0.01}$, which is close to that of matched RQQs ($1.90^{+0.02}_{-0.01}$). No significant correlations between $Γ$ and radio-loudness, $L_\mathrm{x}/L_\mathrm{x,rqq}$ (the X-ray luminosity over that expected from the $L_\mathrm{x}$-$L_\mathrm{uv}$ relation for RQQs), redshift, or Eddington ratio are found for our RLQs. The stacked X-ray spectra of our RLQs show strong iron-line emission and a possible Compton-reflection hump. The intrinsic X-ray variability amplitude is $\approx40$% for RLQs on timescales of months-to-years in the rest frame, which is somewhat smaller than for the matched RQQs ($\approx60$%) on similar timescales, perhaps due to the larger black-hole masses and lower Eddington ratios in our RLQ sample. The X-ray spectral and variability results for our RLQs generally support the idea that the X-ray emission of typical RLQs is dominated by the disk/corona, as is also indicated by a recent luminosity correlation study.
description: 19 pages, 11 figures, accepted for publication in MNRAS
Together, Better: Improving the Impact of Family Feedback to Build More Equitable Schools
Creators: name: Swarr, Kerry
Publisher: name: ProQuest
Year: 2023
Subjects: classificationCode: 39
subject: Education
classificationCode: 390407
subject: Inclusive education
classificationCode: 440301
subject: Family and household studies
classificationCode: 441004
subject: Social change
classificationCode: 441008
subject: Sociology of culture
classificationCode: 441012
subject: Sociology of inequalities
classificationCode: 470208
subject: Culture, representation and identity

description: This study considers how schools can improve their structures and practices for family engagement to optimize the use and impact of family feedback to create transformational and equitable school and family collaborations. Changes in school demographics and family engagement work due to COVID, alongside a racial reckoning that emerged with the murder of George Floyd and fueled a backlash against a range of efforts to achieve greater inclusiveness of the nation’s cultural pluralism. Within education, this dynamic most notably manifested in distortions of critical race theory, which led to legislation banning its teaching across schools, including public universities in some states. It also impacted notions of parent engagement as some sought to expand and amplify the voices of marginalized parents while others worked to block those efforts through the political weaponization of the fears of White parents. Ultimately, this demands a renewed interest in parents’ role in education with particular attention on intentionally designed processes and tools to help schools cultivate authentic and meaningful partnerships with families that represent their school community is more important than ever.
Misure di deformazione nei rivestimenti di gallerie metropolitane
Creators: name: Marino, Roberta
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2010

description: Il monitoraggio delle misure di deformazione nel rivestimento di due gallerie metropolitane della città di Napoli è stato condotto con estensimetri a corda vibrante. Una galleria a scavo convenzionale, con rivestimento provvisorio, ed una a scavo meccanizzato, con rivestimento definitivo in conci prefabbricati, costituiscono i casi di studio. Una modellazione numerica di tipo tridimensionale adoperando il software di calcolo Plaxis, ha permesso di evidenziare come i metodi progettuali tendano a trascurare una serie di fenomeni che in fase cantieristica sono fondamentali nello stabilire il regime di sollecitazione nei rivestimenti.
A 20-Second Cadence View of Solar-Type Stars and Their Planets with TESS: Asteroseismology of Solar Analogs and a Re-characterization of pi Men c
Creators: name: Huber, Daniel
name: White, Timothy R.
name: Metcalfe, Travis S.
name: Chontos, Ashley
name: Fausnaugh, Michael M.
name: Ho, Cynthia S. K.
name: Van Eylen, Vincent
name: Ball, Warrick
name: Basu, Sarbani
name: Bedding, Timothy R.
name: Benomar, Othman
name: Bossini, Diego
name: Breton, Sylvain
name: Buzasi, Derek L.
name: Campante, Tiago L.
name: Chaplin, William J.
name: Christensen-Dalsgaard, Joergen
name: Cunha, Margarida S.
name: Deal, Morgan
name: Garcia, Rafael A.
name: Munoz, Antonio Garcia
name: Gehan, Charlotte
name: Gonzalez-Cuesta, Lucia
name: Jiang, Chen
name: Kayhan, Cenk
name: Kjeldsen, Hans
name: Lundkvist, Mia S.
name: Mathis, Stephane
name: Mathur, Savita
name: Monteiro, Mario J. P. F. G.
name: Nsamba, Benard
name: Ong, Jia Mian Joel
name: Pakstiene, Erika
name: Serenelli, Aldo M.
name: Aguirre, Victor Silva
name: Stassun, Keivan G.
name: Stello, Dennis
name: Stilling, Sissel Norgaard
name: Winther, Mark Lykke
name: Wu, Tao
name: Barclay, Thomas
name: Daylan, Tansu
name: Guenther, Maximilian N.
name: Hermes, J. J.
name: Jenkins, Jon M.
name: Latham, David W.
name: Levine, Alan M.
name: Ricker, George R.
name: Seager, Sara
name: Shporer, Avi
name: Twicken, Joseph D.
name: Vanderspek, Roland K.
name: Winn, Joshua N.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We present an analysis of the first 20-second cadence light curves obtained by the TESS space telescope during its extended mission. We find a precision improvement of 20-second data compared to 2-minute data for bright stars when binned to the same cadence (~10-25% better for T
description: 17 pages (excluding references), 13 figures, 6 tables; accepted for publication in AJ. Data and scripts to reproduce results are archived at https://zenodo.org/record/5555456
Regular magnetic orders in triangular and kagome lattices
Creators: name: Mondal, Kallol
name: Kadolkar, Charudatt
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We investigate the possible regular magnetic order (RMO) for the spin models with global O(3) spin rotation, based on a group theoretical approach for triangular and kagome lattices. The main reason to study these RMOs is that they are good variational candidates for the ground states of many specific models. In this work, we followed the prescription introduced by Messio et al. (L. Messio, C. Lhuillier, and G. Misguich, Phys. Rev. B, 2011, 83, 184401) for the p6m group and extended their work for different subgroups of p6m, i.e., p6, p3, p3m1, and p31m. We have listed all the possible regular magnetic orders for kagome and triangular lattices, which fall into the category of these groups. We calculate the energy and the spin structure factors for each of these states.
Statistical study of electron density turbulence and ion-cyclotron waves in the inner heliosphere: Solar Orbiter observations
Creators: name: Carbone, F.
name: Sorriso-Valvo, L.
name: Khotyaintsev, Yu. V.
name: Steinvall, K.
name: Vecchio, A.
name: Telloni, D.
name: Yordanova, E.
name: Graham, D. B.
name: Edberg, N. J. T.
name: Eriksson, A. I.
name: Johansson, E. P. G.
name: Vásconez, C. L.
name: Maksimovic, M.
name: Bruno, R.
name: D'Amicis, R.
name: Bale, S. D.
name: Chust, T.
name: Krasnoselskikh, V.
name: Kretzschmar, M.
name: Lorfèvre, E.
name: Plettemeier, D.
name: Soucek, J.
name: Steller, M.
name: Štverák, Š.
name: Trávnícek, P.
name: Vaivads, A.
name: Horbury, T. S.
name: O'Brien, H.
name: Angelini, V.
name: Evans, V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Space Physics (physics.space-ph)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: The recently released spacecraft potential measured by the RPW instrument on-board Solar Orbiter has been used to estimate the solar wind electron density in the inner heliosphere. Solar-wind electron density measured during June 2020 has been analysed to obtain a thorough characterization of the turbulence and intermittency properties of the fluctuations. Magnetic field data have been used to describe the presence of ion-scale waves. Selected intervals have been extracted to study and quantify the properties of turbulence. The Empirical Mode Decomposition has been used to obtain the generalized marginal Hilbert spectrum, equivalent to the structure functions analysis, and additionally reducing issues typical of non-stationary, short time series. The presence of waves was quantitatively determined introducing a parameter describing the time-dependent, frequency-filtered wave power. A well defined inertial range with power-law scaling has been found almost everywhere. However, the Kolmogorov scaling and the typical intermittency effects are only present in part of the samples. Other intervals have shallower spectra and more irregular intermittency, not described by models of turbulence. These are observed predominantly during intervals of enhanced ion frequency wave activity. Comparisons with compressible magnetic field intermittency (from the MAG instrument) and with an estimate of the solar wind velocity (using electric and magnetic field) are also provided to give general context and help determine the cause for the anomalous fluctuations.
SVILUPPO DI UN INNOVATIVO DISPOSITIVO DI SMORZAMENTO SEMIATTIVO, BASATO SU TECNOLOGIA PIEZOELETTRICA PER IL CONTROLLO STRUTTURALE ANTISISMICO DI EDIFICI
Creators: name: Di Leo, Romeo
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2010

description: Il lavoro a valle di una diffusa descrizione dello Stato dell'arte del Controllo Strutturale, presenta lo studio e la realizzazione di un dispositivo a carattere innovativo. Il dispositivo proposto è uno smorzatore ad attrito con attuazione piezoelettrica. Lo studio è stato condotto con metodologie numeriche di simulazione.
THE P2Y6 RECEPTOR INHIBITS EFFECTOR T CELL ACTIVATION IN ALLERGIC PULMONARY INFLAMMATION
Creators: name: Giannattasio, Giorgio
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2010

description: We show that the P2Y6 receptor, a G-protein-coupled receptor with high affinity for the nucleotide uridine diphosphate, is an important endogenous inhibitor of T cell function in allergic pulmonary inflammation. Mice conditionally deficient in P2Y6 receptors [p2ry6 (flox/flox);cre/+ mice] exhibited severe airway and tissue pathology relative to P2Y6-sufficient [p2ry6 (flox/flox)] littermates (+/+ mice) when treated intranasally with an extract (Df) of the dust mite Dermatophagoides farinae. P2Y6 receptors were inducibly expressed by lung, lymph node and splenic CD4+ and CD8+ T cells of Df-treated +/+ mice. Df-restimulated P2Y6-deficient lymph node cells produced higher levels of Th1 and Th2 cytokines, and polyclonally-stimulated P2Y6-deficient CD4+ T cells proliferated faster than comparably stimulated P2Y6-sufficient cells. The absence of P2Y6 receptors on CD4+ cells, but not antigen presenting cells, was sufficient to amplify cytokine generation. Thus, P2Y6 receptors protect the lung against exuberant allergen-induced pulmonary inflammation by inhibiting the activation of effector T cells.