cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Slow magnetoacoustic waves in gravitationally stratified two-fluid plasmas in strongly ionised limit
Creators: name: Alharbi, A.
name: Ballai, I.
name: Fedun, V.
name: Verth, G.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Plasma Physics (physics.plasm-ph)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: The plasma dynamics at frequencies comparable with collisional frequency between various species has to be described in multi-fluid framework, where collisional interaction between particles is an important ingredient. In our study we will assume that charged particles are strongly coupled, meaning that they form a single fluid that interacts with neutrals, therefore we will employ a two-fluid model. Here we aim to investigate the evolutionary equation of slow sausage waves propagating in a gravitationally stratified flux tube in the two-fluid solar atmosphere in a strongly ionised limit using an initial value analysis. Due to the collisional interaction between massive particles (ions and neutrals) the governing equations are coupled. Solutions are sought in the strongly ionised limit and the density ratio between neutrals and charged particles is a small parameter. This limit is relevant to the upper part of the chromosphere. Our results show that slow sausage waves associated with charged particles propagate such that their possible frequency is affected by a cut-off due to the gravitational stratification. contrast, for neutral acoustic waves the cut-off value applies on their wavelength and only small wavelength waves are able to propagate. Slow modes associated to neutrals are driven by the collisional coupling with ions.
Parlata naturale: I piati ed i giochi dell'infanzia
Creators: name: Bizzarro, Rino
name: Robertson, Allegra
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2023
Subjects: subject: Barese language
subject: ita

description: Rino Bizzarro risponde ad alcune domande sulla sua infanzia a Bari. Le domande sono fatte in italiano e le risposte, in barese.

Rino Bizzarro responds to several questions about his childhood in Bari. The questions are asked in Italian and responses are provided in Barese.
Poesie: La Portecèdde; Le Remùre de Bare Vecchie (I Rumori di Bari Vecchia)
Creators: name: Ungaro, Rosa
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2023
Subjects: Barese language

description: Rosa Ungaro legge due delle sue proprie poesie.

Rosa Ungaro reads two of her original Barese poems.
Relation Detection for Indonesian Language using Deep Neural Network -- Support Vector Machine
Creators: name: Hasudungan, Ramos Janoah
name: Purwarianti, Ayu
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computation and Language (cs.CL)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences
subject: I.2.7

description: Relation Detection is a task to determine whether two entities are related or not. In this paper, we employ neural network to do relation detection between two named entities for Indonesian Language. We used feature such as word embedding, position embedding, POS-Tag embedding, and character embedding. For the model, we divide the model into two parts: Front-part classifier (Convolutional layer or LSTM layer) and Back-part classifier (Dense layer or SVM). We did grid search method of neural network hyper parameter and SVM. We used 6000 Indonesian sentences for training process and 1,125 for testing. The best result is 0.8083 on F1-Score using Convolutional Layer as front-part and SVM as back-part.
description: 2018 International Conference on Asian Language Processing (IALP)
The millimetre variability of M81* -- Multi-epoch dual frequency mm-observations of the nucleus of M81
Creators: name: Schoedel, R.
name: Krips, M.
name: Markoff, S.
name: Neri, R.
name: Eckart, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: There are still many open questions as to the physical mechanisms at work in Low Luminosity AGN that accrete in the extreme sub-Eddington regime. Simultaneous multi-wavelength studies have been very successful in constraining the properties of SgrA*, the extremely sub-Eddington black hole at the centre of our Milky Way. M81*, the nucleus of the nearby spiral galaxy M81, is an ideal source to extend the insights obtained on SgrA* toward higher luminosity AGN. Here we present observations at 3 and 1 mm that were obtained within the framework of a coordinated,multi-wavelength campaign on M81*. The continuum emission from M81* was observed during three epochs with the IRAM Plateau de Bure Interferometer simultaneously at wavelengths of 3 and 1 mm. We present the first flux measurements of M81* at wavelengths around 1 mm. We find that M81* is a continuously variable source with the higher variability observed at the shorter wavelength. Also, the variability at 3 and 1 mm appears to be correlated. Like SgrA*, M81* appears to display the strongest flux density and variability in the mm-to-submm regime. There remains still some ambiguity concerning the exact location of the turnover frequency from optically thick to optically thin emission. The observed variability time scales point to an upper size limit of the emitting region of the order 25 Schwarzschild radii. The data show that M81* is indeed a system with very similar physical properties to SgrA* and an ideal bridge toward high luminosity AGN. The data obtained clearly demonstrate the usefulness and, above all, the necessity of simultaneous multi-wavelength observations of LLAGN.
description: accepted for publication in A&A
The Final Fate of Binary Neutron Stars: What Happens After the Merger?
Creators: name: Duez, Matthew D.
name: Liu, Yuk Tung
name: Shapiro, Stuart L.
name: Shibata, Masaru
name: Stephens, Branson C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The merger of two neutron stars usually produces a remnant with a mass significantly above the single (nonrotating) neutron star maximum mass. In some cases, the remnant will be stabilized against collapse by rapid, differential rotation. MHD-driven angular momentum transport eventually leads to the collapse of the remnant's core, resulting in a black hole surrounded by a massive accretion torus. Here we present simulations of this process. The plausibility of generating short duration gamma ray bursts through this scenario is discussed.
description: 3 pages. To appear in the Proceedings of the Eleventh Marcel Grossmann Meeting, Berlin, Germany, 23-29 July 2006, World Scientific, Singapore (2007)
Optical Detection of Paramagnetic Defects in a CVD-grown Diamond
Creators: name: Pellet-Mary, C.
name: Huillery, P.
name: Perdriat, M.
name: Tallaire, A.
name: Hétet, G.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The electronic spins of the nitrogen-vacancy centers (NV centers) in Chemical-Vapor-Deposition (CVD) grown diamonds form ideal probes of magnetic fields and temperature, as well as promising qu-bits for quantum information processing. Studying and controlling the magnetic environment of NV centers in such high purity crystals is thus essential for these applications. We demonstrate optical detection of paramagnetic species, such as hydrogen-related complexes, in a CVD-grown diamond. The resonant transfer of the NV centers' polarized electronic spins to the electronic spins of these species generates conspicuous features in the NV photoluminescence by employing magnetic field scans along the [100] crystal direction. Our results offer prospects for more detailed studies of CVD-grown processes as well as for coherent control of the spin of novel classes of hyper-polarized paramagnetic species.
description: 8 pages including appendix
Deciding what’s best for my child : factors that influence parents’ decisions about the care of technology-dependent children at home
Creators: name: Bassingthwaighte, Carol Janet
Publisher: name: University of British Columbia
Year: 2009

description: Over the past decade there has been an increase in the population of children who are technology-dependent and living at home. This has created new roles for parents who learn all aspects of their child's care, including procedures that have traditionally been within the professional's domain. In the process of caring for their child, parents make many decisions related to that care. The factors that influence parental decisions are likely different from those that influence nurses' decisions. Differences between parents and nurses regarding what is the "best care" for a child can result in conflict between them. The purpose of this study was to explore and describe the factors that parents perceived as influencing their decisions regarding the care of their technology-dependent child at home. A secondary analysis was performed on data that had been collected for a phenomenological study which explored the role of the nurse in the home care of children with complex health care needs. Transcripts from interviews with ten parents were analyzed, using an interpretivist paradigm and a symbolic interactionism perspective. Findings revealed that parental readiness for decision-making varied. When parents were first at home they appreciated assistance from nurses to help set up care routines. However, over time, all parents wished to be the decision-maker regarding their child's care. If nurses did not consult parents regarding decisions about their child's care, it created stress for parents or conflict with the nurses. When making decisions parents considered factors related to their child's medical condition or care needs, as well as their child's developmental stage. Parents also considered factors related to themselves, such as their previous experience, their underlying values, other family responsibilities, or their level of fatigue or stress. Finally, parents considered factors related to the environment, such as the parent-nurse relationship, the availability and type of supports, and the physical aspects of the home. Seldom did they consider one factor in isolation from others. Rather, a complex web of factors underlay most decisions, and individual factors influenced the resulting decision in various directions. Three key ideas from the findings are discussed in relation to the existing theoretical and research literature. As well, implications for nursing practice, education, research and program planning are presented.
Mode hunting through active information
Creators: name: Díaz-Pachón, Daniel Andrés
name: Sáenz, Juan Pablo
name: Rao, J. Sunil
name: Dazard, Jean-Eudes
Publisher: name: arXiv
Year: 2020
Subjects: subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Machine Learning (cs.LG)
subject: Methodology (stat.ME)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: 62R07

description: We propose a new method to find modes based on active information. We develop an algorithm that, when applied to the whole space, will say whether there are any modes present \textit{and} where they are; this algorithm will reduce the dimensionality without resorting to Principal Components; and more importantly, population-wise, will not detect modes when they are not present.
description: 12 pages
The Extended Algebra of the Minimal Models
Creators: name: Mathieu, Pierre
name: Ridout, David
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The minimal models M(p',p) with p' > 2 have a unique (non-trivial) simple current of conformal dimension h = (p' - 2) (p - 2) / 4. The representation theory of the extended algebra defined by this simple current is investigated in detail. All highest weight representations are proved to be irreducible: There are thus no singular vectors in the extended theory. This has interesting structural consequences. In particular, it leads to a recursive method for computing the various terms appearing in the operator product expansion of the simple current with itself. The simplest extended models are analysed in detail and the question of equivalence of conformal field theories is carefully examined.
description: 43 pages, 1 figure. Added reference, clarification to proof of Thm 5.1, and several paragraphs to Sec 3.2 addressing modules corresponding to simple current fixed points
title: Stone obstruction of a circumcaval ureter
Creators: name: ADNOR, SAID
Publisher: name: EURORAD
Year: 2024
Subjects: subject: Uroradiology & genital male imaging
subject: Urinary Tract / Bladder
subject: Veins / Vena cava
subject: CT
subject: Clinical Case

description: Clinical History: A 49-year-old patient with no significant medical history presents with chronic low back pain. The pain increased within three days, accompanied by febrile sensations, but there was no deterioration in the general condition.

description: 49 years, male
Non-linear Bragg trap interferometer
Creators: name: Corgier, Robin
name: Pezzè, Luca
name: Smerzi, Augusto
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose a scheme for trapped atom interferometry using an interacting Bose-Einstein condensate. The condensate is controlled and spatially split in two confined external momentum modes through a series Bragg pulses. The proposed scheme (i) allows the generation of large entanglement in a trapped-interferometer configuration via one-axis twisting dynamic induced by interatomic interaction, and (ii) avoids the suppression of interactions during the interferometer sequence by a careful manipulation of the state before and after phase encoding. The interferometer can be used for the measurement of gravity with a sensitivity beyond the standard quantum limit.
description: 5 pages, 4 figures
Sequestration of ethane in the cryovolcanic subsurface of Titan
Creators: name: Mousis, Olivier
name: Schmitt, Bernard
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Saturn's largest satellite, Titan, has a thick atmosphere dominated by nitrogen and methane. The dense orange-brown smog hiding the satellite's surface is produced by photochemical reactions of methane, nitrogen and their dissociation products with solar ultraviolet, which lead primarily to the formation of ethane and heavier hydrocarbons. In the years prior to the exploration of Titan's surface by the Cassini-Huygens spacecraft, the production and condensation of ethane was expected to have formed a satellite-wide ocean one kilometer in depth, assuming that it was generated over the Solar system's lifetime. However, Cassini-Huygens observations failed to find any evidence of such an ocean. Here we describe the main cause of the ethane deficiency on Titan: cryovolcanic lavas regularly cover its surface, leading to the percolation of the liquid hydrocarbons through this porous material and its accumulation in subsurface layers built up during successive methane outgassing events. The liquid stored in the pores may, combined with the ice layers, form a stable ethane-rich clathrate reservoir, potentially isolated from the surface. Even with a low open porosity of 10% for the subsurface layers, a cryovolcanic icy crust less than 2300 m thick is required to bury all the liquid hydrocarbons generated over the Solar system's lifetime.
description: accepted for publication in Astrophysical Journal
Gaseous Tidal Debris found in the NGC 3783 Group
Creators: name: Kilborn, Virginia A.
name: Forbes, Duncan A.
name: Koribalski, Baerbel S.
name: Brough, Sarah
name: Kern, Katie
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have conducted wide-field HI mapping of a ~5.5 x 5.5 degree region surrounding the NGC 3783 galaxy group, to an HI mass limit of ~4 x 10^8 Msun. The observations were made using the multibeam system on the Parkes 64-m radiotelescope, as part of the Galaxy Evolution Multiwavelength Study (GEMS). We find twelve HI detections in our Parkes data, four more than catalogued in HIPASS. We find two new group members, and discover an isolated region of HI gas with an HI mass of ~4 x 10^8 Msun, without a visible corresponding optical counterpart. We discuss the likelihood of this HI region being a low surface brightness galaxy, primordial gas, or a remnant of tidal debris. For the NGC 3783 group we derive a mean recession velocity of 2903 km/s, and a velocity dispersion of 190 km/s. The galaxy NGC 3783 is the nearest galaxy to the luminosity weighted centre of the group, and is at the group mean velocity. From the X-ray and dynamical state of this galaxy group, this group appears to be in the early stages of its evolution.
description: 12 pages, MNRAS accepted: full resolution paper available at http://astronomy.swin.edu.au/~vkilborn/MF1350rv.pdf
Magnetic ground state and electron doping tuning of Curie temperature in Fe$_3$GeTe$_2$: first-principles studies
Creators: name: Shen, Zhen-Xiong
name: Bo, Xiangyan
name: Cao, Kun
name: Wan, Xiangang
name: He, Lixin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Intrinsic magnetic van der Waals (vdW) materials have attracted much attention, especially Fe$_{3}$GeTe$_{2}$ (FGT), which exhibits highly tunable properties. However, despite vast efforts, there are still several challenging issues to be resolved. Here using a first-principles linear-response approach, we carry out comprehensive investigation of both bulk and monolayer FGT. We find that although the magnetic exchange interactions in FGT are frustrated, our Monte Carlo simulations agree with the total energy calculations, confirming that the ground state of bulk FGT is indeed ferromagnetic (FM). A tiny electron doping reduces the magnetic frustration, resulting in significant increasing of the Curie temperature. We also calculate the spin-wave dispersion, and find a small spin gap as well as a nearly flat band in the magnon spectra. These features can be used to compare with the future neutron scattering measurement and finally clarify the microscopic magnetic mechanism in this two-dimensional family materials.
ความสัมพันธ์ระหว่างพฤติกรรมการเรียนตามสมรรถนะวิชาชีพกับความสุขใจในการเรียนของนิสิตทันตแพทย์
Creators: name: ปริญวิทย์ นุราช
name: วิชุดา กิจธรธรรม
Publisher: name: ศูนย์คุณธรรม (องค์การมหาชน)
Year: 2015
Subjects: แคนอนนิคอล,สมรรถนะวิชาชีพ,ความสุขใจ

description: 1, 4, วารสารวิชาการคุณธรรมความดี
Espaces orientaux dans le temps retrouvé de Marcel Proust
Creators: name: Benalil, Mounia
Publisher: name: University of British Columbia
Year: 2009

description: Dans la presente etude, je me propose d'examiner la representation de 1'Orient dans Le Temps retrouve de Marcel Proust. Je considere "le Paris de la Guerre", "1'hotel de Jupien" et la "matinee Guermantes" comme trois espaces textuels ou s'articule le besoin proustien d'exotisme. Ces trois espaces forment le sujet de cette these. La creation de ces espaces est sous-tendue par une profonde inversion: inversion du Paris de la Guerre en un Bagdad des Contes arabes, inversion de 1'hotel de Jupien en un harem oriental et inversion de 1'hotel des Guermantes en un serail de promesse litteraire. L'inversion parcourt toute laRecherche aussi bien dans ses aspects esthetiques que thematiques. La presente etude a un double but: d'une part, degager l'enonce orientaliste tel qu'il se presente a travers les procedes descriptifs de la narration; d'autre part, devoiler le danger de toute representation romanesque qui s'eloigne de son principe d'historicite. En effet, la representation de l'Orient, dans Le Temps retrouve, est mythifiee pour etre l'Ailleurs pittoresque recherche par l'ecrivain et pour appuyer la theorie proustienne de 1'inversion qui se veut loi d'ecriture et optique de lecture. L'approche utilisee repose sur deux principaux appuis theoriques: Edward Said et Roland Barthes. L'apport de Said nous permettra de contextualiser l'oeuvre de Proust dans l'espace de 1'orientalisme, l'apport de Barthes, de demonter le jeu de la mythification qui traverse l'oeuvre. L'orientalisme proustien est paradoxal dans la mesure ou il inscrit l'Orient dans 1'Occident. Le paradoxe de cette inscription est qu'elle reste "prisonniere" de l'espace psychique du narrateur et du sujet proustien en general.
The Adaptive Shift Method in Full Configuration Interaction Quantum Monte Carlo: Development and Applications
Creators: name: Ghanem, Khaldoon
name: Guther, Kai
name: Alavi, Ali
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In a recent paper, we proposed the adaptive shift method for correcting the undersampling bias of the initiator-FCIQMC. The method allows faster convergence with the number of walkers to the FCI limit than the normal initiator method, particularly for large systems. In its application to strongly correlated molecules, however, the method is prone to overshooting the FCI energy at intermediate walker numbers, with convergence to the FCI limit from below. In this paper, we present a solution to the overshooting problem in strongly correlated molecules, as well as further accelerating convergence to the FCI energy. This is achieved by offsetting the reference energy to a value typically below the Hartree-Fock energy but above the exact energy. This offsetting procedure does not change the exactness property of the algorithm, namely convergence to the exact FCI solution in the large-walker limit, but at its optimal value greatly accelerates convergence. There is no overhead cost associated with this offsetting procedure, and is therefore a pure and substantial computational gain. We illustrate the behavior of this offset adaptive shift method by applying it to the N$_2$ molecule, the ozone molecule at three different geometries (equilibrium open minimum, a hypothetical ring minimum, and a transition state) in three basis sets (cc-pV$X$Z, $X$=D,T,Q), and the chromium dimer in cc-pVDZ basis set, correlating 28 electrons in 76 orbitals. We show that in most cases the offset adaptive shift method converges much faster than both the normal initiator method and the original adaptive shift method.
The large scale CMB cut-off and the tensor-to-scalar ratio
Creators: name: Nicholson, Gavin
name: Contaldi, Carlo R.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We show that if inflation lasted just longer than the required 60 or so e-folds $N$ both scalar and tensor contributions to the Cosmic Microwave Background (CMB) power spectra are expected to show a cut-off. However the behaviour of the scalar-to-tensor ratio on large scale depends on whether inflation is preceded by a Kinetic Dominated (KD) or Radiation Dominated (RD) stage. Future experiments may be able to distinguish between the two behaviours and thus shed light on the nature of the low-$\ell$ cutoff. In particular if the cut-off is due to a KD stage the ratio is expected to grow on large scales. If observed this would challenge our current understanding of the overall probability of inflation lasting for $N$ greater than 60.
description: 4 pages, 3 figures, matches accepted version
Radiation Hardness of CCD Vertex Detectors for the ILC
Creators: name: Sopczak, Andre
name: Bekhouche, Khaled
name: Bowdery, Chris
name: Damerell, Chris
name: Davies, Gavin
name: Dehimi, Lakhdar
name: Greenshaw, Tim
name: Koziel, Michal
name: Stefanov, Konstantin
name: Woolliscroft, Tim
name: Worm, Steve
Publisher: name: arXiv
Year: 2006
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: Results of detailed simulations of the charge transfer inefficiency of a prototype CCD chip are reported. The effect of radiation damage in a particle detector operating at a future accelerator is studied by examining two electron trap levels, 0.17 eV and 0.44 eV below the bottom of the conduction band. Good agreement is found between simulations using the ISE-TCAD DESSIS program and an analytical model for the 0.17 eV level. Optimum operation is predicted to be at about 250 K where the effect of the traps is minimal which is approximately independent of readout frequency. This work has been carried out within the Linear Collider Flavour Identification (LCFI) collaboration in the context of the International Linear Collider (ILC) project.
description: 7 pages, 10 figures. Presented at the IEEE 2006 Nuclear Science Symposium, San Diego, USA, and the 10th Topical Seminar on Innovative Particle and Radiation Detectors (IPRD06), 2006, Siena, Italy
Poesia: U vindisette (Il ventisette)
Creators: name: Cutino, Nicola
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2023
Subjects: Barese language

description: Nicola Cutino legge una poesia dal libro, "Iere, 'na volde: versi e un dialogo in vernacolo barese", da Saverio Micunco.

Nicola Cutino reads a poem from the book, "Iere, 'na volde: versi e un dialogo in vernacolo barese", by Saverio Micunco.
On Feature Selection Using Anisotropic General Regression Neural Network
Creators: name: Amato, Federico
name: Guignard, Fabian
name: Jacquet, Philippe
name: Kanevski, Mikhail
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (stat.ML)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences
subject: G.3

description: The presence of irrelevant features in the input dataset tends to reduce the interpretability and predictive quality of machine learning models. Therefore, the development of feature selection methods to recognize irrelevant features is a crucial topic in machine learning. Here we show how the General Regression Neural Network used with an anisotropic Gaussian Kernel can be used to perform feature selection. A number of numerical experiments are conducted using simulated data to study the robustness of the proposed methodology and its sensitivity to sample size. Finally, a comparison with four other feature selection methods is performed on several real world datasets.
Machine Learning Information Fusion in Earth Observation: A Comprehensive Review of Methods, Applications and Data Sources
Creators: name: Salcedo-Sanz, S.
name: Ghamisi, P.
name: Piles, M.
name: Werner, M.
name: Cuadra, L.
name: Moreno-Martínez, A.
name: Izquierdo-Verdiguier, E.
name: Muñoz-Marí, J.
name: Mosavi, Amirhosein
name: Camps-Valls, G.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: This paper reviews the most important information fusion data-driven algorithms based on Machine Learning (ML) techniques for problems in Earth observation. Nowadays we observe and model the Earth with a wealth of observations, from a plethora of different sensors, measuring states, fluxes, processes and variables, at unprecedented spatial and temporal resolutions. Earth observation is well equipped with remote sensing systems, mounted on satellites and airborne platforms, but it also involves in-situ observations, numerical models and social media data streams, among other data sources. Data-driven approaches, and ML techniques in particular, are the natural choice to extract significant information from this data deluge. This paper produces a thorough review of the latest work on information fusion for Earth observation, with a practical intention, not only focusing on describing the most relevant previous works in the field, but also the most important Earth observation applications where ML information fusion has obtained significant results. We also review some of the most currently used data sets, models and sources for Earth observation problems, describing their importance and how to obtain the data when needed. Finally, we illustrate the application of ML data fusion with a representative set of case studies, as well as we discuss and outlook the near future of the field.
The Signature of Patchy Reionization in the Polarization Anisotropy of the CMB
Creators: name: Doré, Olivier
name: Holder, Gil
name: Alvarez, Marcelo
name: Iliev, Ilian T.
name: Mellema, Garrelt
name: Pen, Ue-Li
name: Shapiro, Paul R.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The inhomogeneous ionization state of the universe when the first sources of ionizing radiation appeared should lead to anisotropies in the polarization of the cosmic microwave background. We use cosmological simulations of the process by which the first sources ionized the intergalactic medium to study the induced polarization anisotropies. We find that the polarization anisotropies have rms of order ~0.01 μK, and local peak values of ~0.1 μK, smaller than those due to gravitational lensing on small scales. The polarization direction is highly coherent over degree scales. This directional coherence is not expected from either primary anisotropy or gravitational lensing effects, making the largest signals due to inhomogeneous ionization relatively easy to isolate, should experiments achieve the necessary very low noise levels.
description: 11 pages, 6 figures, submitted to PRD
Foodbot: A Goal-Oriented Just-in-Time Healthy Eating Interventions Chatbot
Creators: name: Prasetyo, Philips Kokoh
name: Achananuparp, Palakorn
name: Lim, Ee-Peng
Publisher: name: arXiv
Year: 2020
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: Recent research has identified a few design flaws in popular mobile health (mHealth) applications for promoting healthy eating lifestyle, such as mobile food journals. These include tediousness of manual food logging, inadequate food database coverage, and a lack of healthy dietary goal setting. To address these issues, we present Foodbot, a chatbot-based mHealth application for goal-oriented just-in-time (JIT) healthy eating interventions. Powered by a large-scale food knowledge graph, Foodbot utilizes automatic speech recognition and mobile messaging interface to record food intake. Moreover, Foodbot allows users to set goals and guides their behavior toward the goals via JIT notification prompts, interactive dialogues, and personalized recommendation. Altogether, the Foodbot framework demonstrates the use of open-source data, tools, and platforms to build a practical mHealth solution for supporting healthy eating lifestyle in the general population.
description: Accepted to EAI '20
New probability distributions in astrophysics: IV. The relativistic Maxwell-Boltzmann distribution
Creators: name: Zaninetti, Lorenzo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Two relativistic distributions which generalizes the Maxwell Boltzman (MB) distribution are analyzed: the relativistic MB and the Maxwell-J{ü}ttner (MJ) distribution. For the two distributions we derived in terms of special functions the constant of normalization, the average value, the second moment about the origin, the variance, the mode, the asymptotic behavior, approximate expressions for the average value as function of the temperature and the connected inverted expressions for the temperature as function of the average value. Two astrophysical applications to the synchrotron emission in presence of the magnetic field and the relativistic electrons are presented.
description: 15 pages and 17 figures
DynamiTe: Dynamic Termination and Non-termination Proofs
Creators: name: Le, Ton Chanh
name: Antonopoulos, Timos
name: Fathololumi, Parisa
name: Koskinen, Eric
name: Nguyen, ThanhVu
Publisher: name: arXiv
Year: 2020
Subjects: subject: Programming Languages (cs.PL)
subject: FOS: Computer and information sciences

description: There is growing interest in termination reasoning for non-linear programs and, meanwhile, recent dynamic strategies have shown they are able to infer invariants for such challenging programs. These advances led us to hypothesize that perhaps such dynamic strategies for non-linear invariants could be adapted to learn recurrent sets (for non-termination) and/or ranking functions (for termination). In this paper, we exploit dynamic analysis and draw termination and non-termination as well as static and dynamic strategies closer together in order to tackle non-linear programs. For termination, our algorithm infers ranking functions from concrete transitive closures, and, for non-termination, the algorithm iteratively collects executions and dynamically learns conditions to refine recurrent sets. Finally, we describe an integrated algorithm that allows these algorithms to mutually inform each other, taking counterexamples from a failed validation in one endeavor and crossing both the static/dynamic and termination/non-termination lines, to create new execution samples for the other one.
description: To appear at OOPSLA 2020
Physical limits on computation by assemblies of allosteric proteins
Creators: name: Robinson, John M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Assemblies of allosteric proteins, nano-scale Brownian computers, are the principle information processing devices in biology. The troponin C-troponin I (TnC-TnI) complex, the Ca$^{2+}$-sensitive regulatory switch of the heart, is a paradigm for Brownian computation. TnC and TnI specialize in sensing (reading) and reporting (writing) tasks of computation. We have examined this complex using a newly developed phenomenological model of allostery. Nearest-neighbor-limited interactions among members of the assembly place previously unrecognized constrains the topology of the system's free energy landscape and generate degenerate transition probabilities. As a result, signaling fidelity and deactivation kinetics can not be simultaneously optimized. This trade-off places an upper limit on the rate of information processing by assemblies of allosteric proteins that couple to a single ligand chemical bath.
description: 6 pages, 3 figures. 2 pages of supplemental information
Tracking the year-to-year variation in the spectral energy distribution of the Narrow-line Seyfert 1 Galaxy Mrk335
Creators: name: Tripathi, S.
name: McGrath, K. M.
name: Gallo, L. C.
name: Grupe, D.
name: Komossa, S.
name: Berton, M.
name: Kriss, G.
name: Longinotti, A. L.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Multi-wavelength monitoring of Mrk 335 with Swift between 2007-2019 are used to construct annual spectral energy distributions and track year-to-year changes. Non-contemporaneous archival data prior to 2007 are used to build a bright state SED. In this work, the changes are examined and quantified to build the foundation for future SED modelling. The yearly SEDs trace a downward trend on the average, with the X-ray portion varying significantly and acquiring further lower values in the past two years when compared to the optical/UV portion of SED. The bolometric Eddington ratios derived using optical/UV to X-ray SEDs and the calculated X-ray luminosities show a gradual decrease over the monitoring period. Changes in the parameters over time are examined. Principal component analysis suggests that the primary variability is in the X-ray properties of Mrk 335. When looking at the broader picture of Mrk 335 and its behaviour, the X-rays, accounting most of the variability in the 13-year data, are possibly driven by physical processes related to the corona or absorption whereas the modest optical-UV variations suggest their origin within the accretion disc. These results are consistent with the previous interpretation of Mrk 335 using the timing analyses on the monitoring data and spectral modelling of deep observations.
description: Accepted for publication in MNRAS. Long tables 3 and 4 are available as supplementary material of MNRAS
Two Dimensional Directed Lattice Walks with Boundaries
Creators: name: Ayyer, Arvind
name: Zeilberger, Doron
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Combinatorics (math.CO)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We present general algorithms (fully implemented in Maple) for calculations of various quantities related to constrained directed walks for a general set of steps on the square lattice in two dimensions. As a special case, we rederive results of earlier works.
description: 29 pages, 10 figures, some references added. Some physical results stated more clearly
QED positivity bounds
Creators: name: Alberte, Lasma
name: de Rham, Claudia
name: Jaitly, Sumer
name: Tolley, Andrew J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We apply positivity bounds directly to a $U(1)$ gauge theory with charged scalars and charged fermions, i.e. QED, minimally coupled to gravity. Assuming that the massless $t$-channel pole may be discarded, we show that the improved positivity bounds are violated unless new physics is introduced at the parametrically low scale $Λ_{\rm new} \sim (e m M_{\rm pl})^{1/2}$, consistent with similar results for scalar field theories, far lower than the scale implied by the weak gravity conjecture. This is sharply contrasted with previous treatments which focus on the application of positivity bounds to the low energy gravitational Euler-Heisenberg effective theory only. We emphasise that the low-cutoff is a consequence of applying the positivity bounds under the assumption that the pole may be discarded. We conjecture an alternative resolution that a small amount of negativity, consistent with decoupling limits, is allowed and not in conflict with standard UV completions, including weakly coupled ones.
description: 17 pages, 7 figures, 13 pages appendices
La réception critique franĉaise de Voyage au bout de la nuit de Louis-Ferdinand Céline
Creators: name: Bruxelle, Thierry
Publisher: name: University of British Columbia
Year: 2009

description: Cette etude jaussienne de I'immediate reception critique de Voyage au bout de la nuit de L.-F. Celine abordera deux aspects essentiels de la question: comment la lecture s'est-elle effectuee, c'est-a-dire quelles sont les structures qui la caracterisent, et ensuite, pourquoi cette lecture a-t-elle ete si politiquement polarisee? L'utilisation de la theorie jaussienne de la reception implique la reconstitution de I'horizon d'attente du lecteur des annees trente. Pour ce faire, nous avons suivi la composition de Voyage au bout de la nuit pour choisir quelques ouvrages caracteristiques de I'experience de lecture du critique. Cela nous a permis de mieux comprendre les codes litteraires de l'epoque. Les critiques de Voyage au bout de la nuit ont raisonne a partir d'une logique de genre. C'est la raison pour laquelle Ton peut retrouver d'une maniere transideologique la meme structure d'approche critique de Voyage au bout de la nuit. Selon nous, trois dimensions caracterisent cette demarche critique: la classification, la comparaison et la prise de position. C'est ainsi que nous pouvons proposer a partir de cette structure une definition de la fonction sociale de la critique: la critique jauge l'oeuvre face aux criteres implicites et explicites qui torment la definition du roman, definition issue des valeurs inherentes a I'experience de socialisation du critique. Si la reception critique de Voyage au bout de la nuit s'est effectuee d'une maniere si poiemique, c'est en partie du aux nombreuses regies esthetiques du roman que Celine brise. Cette evolution du roman a ete vue par les critiques progressistes comme une avancee certaine dans la prise de conscience populaire de la realite sociale tandis que pour les critiques conservateurs ces pretendues innovations n'etaient en fait qu'une trangression cavalieres des regies esthetiques.
Spin polarization control by electric field gradients
Creators: name: Csontos, Dan
name: Ulloa, Sergio E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We show that the propagation of spin polarized carriers may be dramatically affected by {\em inhomogeneous} electric fields. Surprisingly, the spin diffusion length is found to strongly depend on the sign and magnitude of electric field \emph{gradients}, in addition to the previously reported dependence on the sign and magnitude of the electric field [Yu & Flatté, Phys. Rev. B {\bf 66}, 201202(R) 2002; {\em ibid.} {\bf 66}, 235302 (2002)]. This indicates that purely electrical effects may play a crucial role in spin polarized injection, transport and detection in semiconductor spintronics. A generalized drift-diffusion equation that describes our findings is derived and verified by numerical calculations using the Boltzmann transport equation.
description: 7 pages, 4 figures; updated and extended version, added figure, updated reference list
Using machine-learning modelling to understand macroscopic dynamics in a system of coupled maps
Creators: name: Borra, Francesco
name: Baldovin, Marco
Publisher: name: arXiv
Year: 2020
Subjects: subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Machine Learning (cs.LG)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Machine learning techniques not only offer efficient tools for modelling dynamical systems from data, but can also be employed as frontline investigative instruments for the underlying physics. Nontrivial information about the original dynamics, which would otherwise require sophisticated ad-hoc techniques, can be obtained by a careful usage of such methods. To illustrate this point, we consider as a case study the macroscopic motion emerging from a system of globally coupled maps. We build a coarse-grained Markov process for the macroscopic dynamics both with a machine learning approach and with a direct numerical computation of the transition probability of the coarse-grained process, and we compare the outcomes of the two analyses. Our purpose is twofold: on the one hand, we want to test the ability of the stochastic machine learning approach to describe nontrivial evolution laws, as the one considered in our study; on the other hand, we aim at gaining some insight into the physics of the macroscopic dynamics by modulating the information available to the network, we are able to infer important information about the effective dimension of the attractor, the persistence of memory effects and the multi-scale structure of the dynamics.
description: 17 pages, 13 figures
Parlata naturale: Conversazione sulla cucina
Creators: name: Cutino, Nicola
name: Ungaro, Rosa
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2023
Subjects: subject: Barese language
subject: ita

description: Rosa e Nicola discutono cosa cucinare per la cena.

Rosa and Nicola discuss what to cook for dinner.
Astrophysical Axion Bounds
Creators: name: Raffelt, Georg G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Axion emission by hot and dense plasmas is a new energy-loss channel for stars. Observational consequences include a modification of the solar sound-speed profile, an increase of the solar neutrino flux, a reduction of the helium-burning lifetime of globular-cluster stars, accelerated white-dwarf cooling, and a reduction of the supernova SN 1987A neutrino burst duration. We review and update these arguments and summarize the resulting axion constraints.
description: Contribution to Axion volume of Lecture Notes in Physics, 20 pages, 3 figures
Efficient Nonlinear RX Anomaly Detectors
Creators: name: Hidalgo, José A. Padrón
name: Pérez-Suay, Adrián
name: Nar, Fatih
name: Camps-Valls, Gustau
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: Image and Video Processing (eess.IV)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Current anomaly detection algorithms are typically challenged by either accuracy or efficiency. More accurate nonlinear detectors are typically slow and not scalable. In this letter, we propose two families of techniques to improve the efficiency of the standard kernel Reed-Xiaoli (RX) method for anomaly detection by approximating the kernel function with either {\em data-independent} random Fourier features or {\em data-dependent} basis with the Nyström approach. We compare all methods for both real multi- and hyperspectral images. We show that the proposed efficient methods have a lower computational cost and they perform similar (or outperform) the standard kernel RX algorithm thanks to their implicit regularization effect. Last but not least, the Nyström approach has an improved power of detection.
Fabrication of stable Pd nanowire assisted by hydrogen in solution
Creators: name: Kiguchi, Manabu
name: Murakoshi, Kei
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We have mechanically fabricated a Pd nanowire in solution under electrochemical potential control. A clear feature appeared in the conductance histogram when the electrochemical potential of the Pd wire was kept at the hydrogen evolution potential. Conductance traces showed the Pd wire was stretched 0.4 nm in length just before breaking, suggesting that at least two Pd atoms might contribute to the formation of the Pd wire. The results indicate that a certain atomic configuration of the Pd nanowire is stabilized by hydrogen. We discuss the stabilization mechanism due to changes in bond strengths caused by hydrogen adsorption or incorporation.
description: 4 pages, 3 figures, Appl. Phys. Lett., in press
Polynomial Associative Algebras for Quantum Superintegrable Systems with a Third Order Integral of Motion
Creators: name: Marquette, Ian
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mathematical Physics (math-ph)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: We consider a superintegrable Hamiltonian system in a two-dimensional space with a scalar potential that allows one quadratic and one cubic integral of motion. We construct the most general associative cubic algebra and we present specific realizations. We use them to calculate the energy spectrum. All classical and quantum superintegrable potentials separable in cartesian coordinates with a third order integral are known. The general formalism is applied to one of the quantum potentials.