cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A Survey of Quantum Lyapunov Control Methods
Creators: name: Cong, Shuang
name: Meng, Fangfang
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mathematical Physics (math-ph)
subject: Systems and Control (eess.SY)
subject: FOS: Physical sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The condition of a quantum Lyapunov-based control which can be well used in a closed quantum system is that the method can make the system convergent but not just stable. In the convergence study of the quantum Lyapunov control, two situations are classified: non-degenerate cases and degenerate cases. In this paper, for these two situations, respectively, the target state is divided into four categories: eigenstate, the mixed state which commutes with the internal Hamiltonian, the superposition state, and the mixed state which does not commute with the internal Hamiltonian state. For these four categories, the quantum Lyapunov control methods for the closed quantum systems are summarized and analyzed. Especially, the convergence of the control system to the different target states is reviewed, and how to make the convergence conditions be satisfied is summarized and analyzed.
description: 14
A Comparison of Deep Learning Models for Proton Background Rejection with the AMS Electromagnetic Calorimeter
Creators: name: Hashmani, Raheem Karim
name: Akbaş, Emre
name: Demirköz, Melahat Bilge
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: The Alpha Magnetic Spectrometer (AMS) is a high-precision particle detector onboard the International Space Station containing six different subdetectors. The Transition Radiation Detector and Electromagnetic Calorimeter (ECAL) are used to separate electrons/positrons from the abundant cosmic-ray proton background.
 The positron flux measured in space by AMS falls with a power law which unexpectedly softens above 25 GeV and then hardens above 280 GeV. Several theoretical models try to explain these phenomena, and a purer measurement of positrons at higher energies is needed to help test them. The currently used methods to reject the proton background at high energies involve extrapolating shower features from the ECAL to use as inputs for boosted decision tree and likelihood classifiers. We present a new approach for particle identification with the AMS ECAL using deep learning (DL). By taking the energy deposition within all the ECAL cells as an input and treating them as pixels in an image-like format, we train an MLP, a CNN, and multiple ResNets and Convolutional vision Transformers (CvTs) as shower classifiers.
 Proton rejection performance is evaluated using Monte Carlo (MC) events and ISS data separately. For MC, using events with a reconstructed energy between 0.2 - 2 TeV, at 90% electron accuracy, the proton rejection power of our CvT model is more than 5 times that of the other DL models. Similarly, for ISS data with a reconstructed energy between 50 - 70 GeV, the proton rejection power of our CvT model is more than 2.5 times that of the other DL models.
description: 19 pages, 11 Figures
Performance analysis of MUSIC-type imaging without diagonal elements of multi-static response matrix
Creators: name: Park, Won-Kwang
Publisher: name: arXiv
Year: 2024
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 78A46

description: Generally, to apply the MUltiple SIgnal Classification (MUSIC) algorithm for the rapid imaging of small inhomogeneities, the complete elements of the multi-static response (MSR) matrix must be collected. However, in real-world applications such as microwave imaging or bistatic measurement configuration, diagonal elements of the MSR matrix are unknown. Nevertheless, it is possible to obtain imaging results using a traditional approach but theoretical reason of the applicability has not been investigated yet. In this paper, we establish mathematical structures of the imaging function of MUSIC from an MSR matrix without diagonal elements in both transverse magnetic (TM) and transverse electric (TE) polarizations. The established structures demonstrate why the shape of the location of small inhomogeneities can be retrieved via MUSIC without the diagonal elements of the MSR matrix. In addition, they reveal the intrinsic properties of imaging and the fundamental limitations. Results of numerical simulations are also provided to support the identified structures.
description: 20 pages, 7 figures
Definition of specifications and data requirements for waste streams valorisation as fuels analysis
Creators: name: Arroyo, Jorge
name: Gonzalo, Cristina
name: Solís, Irene
name: Cuervo, Víctor
name: Pierri, Erika
name: Jaio Manzanedo
Publisher: name: Zenodo
Year: 2019
Subjects: Energy and materials flexibility
Energy management
Sustainable planning
Energy efficiency
Waste heat recovery
Valorisation
Monitoring systems
Energy intensive industry
Energy and resource flexibility in highly energy intensive industries

description: This document analyzes the most relevant waste streams with a potential interest to be used as fuel in the demo-sites of AMIII, UPM and TÜPRAS. The most important parameters, like the composition, heating values or availability at each demo-site are explained, together with the analysis of the advantages and disadvantages of these fuels in order to be valorized on site.
การวิจัยเชิงสร้างสรรค์ บทประพันธ์เพลง เดวิสฟินอมินอน
Creators: name: เจตนิพิฐ  สังข์วิจิตร
Publisher: name: คณะมนุษยศาสตร์และสังคมศาสตร์ มหาวิทยาลัยราชภัฏพระนครศรีอยุธยา
Year: 2022
Subjects: บิกแบนด์
การประพันธ์เพลงแจ๊ส
ไมล์ส เดวิส

description: วารสารวิชาการมนุษยศาสตร์และสังคมศาสตร์ มหาวิทยาลัยราชภัฏพระนครศรีอยุธยา, 10, 2, 119-143
On the projected increase of Sahel rainfall during the late rainy season
Creators: name: Monerie, Paul-Arthur
name: Biasutti, Michela
name: Roucou, Pascal
Publisher: name: Columbia University
Year: 2016
Subjects: Climatology
Monsoons
Precipitation forecasting

description: Thirteen CMIP5 models are used to analyse changes in climate over the West African monsoon region between the near future (2031–2070 under the RCP4.5 emission scenario), and a control period (1960–1999 under the historical emission scenario), with a focus on the late rainy season. The monsoon circulation is projected to strengthen and to shift northward leading to more rainfall during the Sahelian season. The results show an increase of the Rainfall amounts inSeptember–October and a delay in the monsoon withdrawal. The increased moisture that fuels the rainfall anomalies is associated with an increase in moisture flux convergence and with local moisture recycling. The moisture transport dominates the water budget change in September while the local recycling is prominent in October. The delay in monsoon withdrawal, although expected from the increase in rainfall in September–October, is not strongly correlated with the size of the monthly anomalies.
Nonconvex notions of regularity and convergence of fundamental algorithms for feasibility problems
Creators: name: Hesse, Robert
name: Luke, D. Russell
Publisher: name: arXiv
Year: 2012
Subjects: subject: Optimization and Control (math.OC)
subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 49J52, 49M20 (Primary) 47H09, 65K05, 65K10, 90C26 (Secondary)

description: We consider projection algorithms for solving (nonconvex) feasibility problems in Euclidean spaces. Of special interest are the Method of Alternating Projections (MAP) and the Douglas-Rachford or Averaged Alternating Reflection Algorithm (AAR). In the case of convex feasibility, firm nonexpansiveness of projection mappings is a global property that yields global convergence of MAP and for consistent problems AAR. Based on (ε, δ)-regularity of sets developed by Bauschke, Luke, Phan and Wang in 2012, a relaxed local version of firm nonexpansiveness with respect to the intersection is introduced for consistent feasibility problems. Together with a coercivity condition that relates to the regularity of the intersection, this yields local linear convergence of MAP for a wide class of nonconvex problems,
description: 22 pages, no figures, 30 references
Gamma-ray line from radiative decay of gravitino dark matter
Creators: name: Liew, Seng Pei
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study radiative decay of gravitino dark matter with trilinear R-parity violations. We show that the branching ratio of the decay of gravitino into monochromatic photon can be large enough to explain the observed gamma-ray line from the Galactic centre in the Fermi-LAT data without producing too much continuum gamma-ray and anti-proton flux. This scenario is realized when the mass of sfermions and the trilinear R-parity violating coupling are $O(1-10)$ TeV and $O(10^{-7}-10^{-6})$ respectively.
description: 10 pages, 1 figure; added references, modified figure, expanded discussions, published version
Spin-velocity correlations of optically pumped atoms
Creators: name: Marsland, R.
name: McGuyer, B. H.
name: Olsen, B. A.
name: Happer, W.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We present efficient theoretical tools for describing the optical pumping of atoms by light propagating at arbitrary directions with respect to an external magnetic field, at buffer-gas pressures that are small enough for velocity-selective optical pumping (VSOP) but large enough to cause substantial collisional relaxation of the velocities and the spin. These are the conditions for the sodium atoms at an altitude of about 100 km that are used as guidestars for adaptive optics in modern ground-based telescopes to correct for aberrations due to atmospheric turbulence. We use spin and velocity relaxation modes to describe the distribution of atoms in spin space (including both populations and coherences) and velocity space. Cusp kernels are used to describe velocity-changing collisions. Optical pumping operators are represented as a sum of poles in the complex velocity plane. Signals simulated with these methods are in excellent agreement with previous experiments and with preliminary experiments in our laboratory.
description: 17 pages, 8 figures
The virial theorem and the dark matter problem in hybrid metric-Palatini gravity
Creators: name: Capozziello, Salvatore
name: Harko, Tiberiu
name: Koivisto, Tomi S.
name: Lobo, Francisco S. N.
name: Olmo, Gonzalo J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Physics (physics.gen-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Hybrid metric-Palatini gravity is a recently proposed theory, consisting of the superposition of the metric Einstein-Hilbert Lagrangian with an $f(\cal R)$ term constructed à la Palatini. The theory predicts the existence of a long-range scalar field, which passes the Solar System observational constraints, even if the scalar field is very light, and modifies the cosmological and galactic dynamics. Thus, the theory opens new possibilities to approach, in the same theoretical framework, the problems of both dark energy and dark matter. In this work, we consider the generalized virial theorem in the scalar-tensor representation of the hybrid metric-Palatini gravity. More specifically, taking into account the relativistic collisionless Boltzmann equation, we show that the supplementary geometric terms in the gravitational field equations provide an effective contribution to the gravitational potential energy. We show that the total virial mass is proportional to the effective mass associated with the new terms generated by the effective scalar field, and the baryonic mass. This shows that the geometric origin in the generalized virial theorem may account for the well-known virial theorem mass discrepancy in clusters of galaxies. In addition to this, we also consider astrophysical applications of the model and show that the model predicts that the mass associated to the scalar field and its effects extend beyond the virial radius of the clusters of galaxies. In the context of the galaxy cluster velocity dispersion profiles predicted by the hybrid metric-Palatini model, the generalized virial theorem can be an efficient tool in observationally testing the viability of this class of generalized gravity models.
description: 11 pages, no figures; minor modifications, accepted for publication In JCAP
Scripts and files used for Gonipterus scutellatus species complex phylogenetic analysis
Creators: name: Pinto, C. Miguel
Publisher: name: Zenodo
Year: 2023

description: Attached are the R script, .fasta and .phy files used for phylogenetic analysis of species of the Gonipterus scutellatus species complex described in the publication: Presence of the Eucalyptus snout beetle in Ecuador and potential invasion risk in South America, by Verónica Crespo-Pérez, J. Angel Soto-Centeno, C. Miguel Pinto, Ana Avilés, Washington Pruna, Claudia Terán and Álvaro Barragán.
Reading Across Firishta and Chimalpahin
Creators: name: Ahmed Asif, Manan
Publisher: name: Columbia University
Year: 2021
Subjects: History
Postcolonialism

description: In this essay, I reflect on the position of a postcolonized historian traversing space and time, thinking and linking to histories of European arrivals to Mexico and India. The essay is concerned with early seventeenth-century histories by Chimalpahin and Firishta, who documented their worlds before and after the arrival of Europeans. I argue for a transregional decolonial approach to thinking about historical violence and the formation of disciplinary histories.
RX J0440.9+4431: a persistent Be/X-ray binary in outburst
Creators: name: Ferrigno, C.
name: Farinelli, R.
name: Bozzo, E.
name: Pottschmidt, K.
name: Klochkov, D.
name: Kretschmar, P.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The persistent Be/X-ray binary RX J0440.9+4431 flared in 2010 and 2011 and has been followed by various X-ray facilities Swift, RXTE, XMM-Newton, and INTEGRAL. We studied the source timing and spectral properties as a function of its X-ray luminosity to investigate the transition from normal to flaring activity and the dynamical properties of the system. We have determined the orbital period from the long-term Swift/BAT light curve, but our determinations of the spin period are not precise enough to constrain any orbital solution. The source spectrum can always be described by a bulk-motion Comptonization model of black body seed photons attenuated by a moderate photoelectric absorption. At the highest luminosity, we measured a curvature of the spectrum, which we attribute to a significant contribution of the radiation pressure in the accretion process. This allows us to estimate that the transition from a bulk-motion-dominated flow to a radiatively dominated one happens at a luminosity of ~2e36 erg/s. The luminosity dependency of the size of the black body emission region is found to be $r_{BB} \propto L_X^{0.39\pm0.02}$. This suggests that either matter accreting onto the neutron star hosted in RX J0440.9+4431 penetrates through closed magnetic field lines at the border of the compact object magnetosphere or that the structure of the neutron star magnetic field is more complicated than a simple dipole close to the surface
description: Accepted for publication by A&A
The photoisomerization of azobenzene at 77°K in a rigid solvent and at room temperature
Creators: name: Kraus, Bernhard August
Publisher: name: California Institute of Technology
Year: 1958
Subjects: Chemistry

description: The photoisomerization of azobenzene has been studied at room temperature in ethanol and P. Me.H., and at 77°K in a P.Me.H. rigid solvent. At room temperature, the photostationary state composition is 74%  trans (and 26 % cis) in ethanol and 77 % trans in P.Me.H.; it is 98 % trans in P.Me.H. at 77°K. It has been shown that both the trans to cis and the cis to trans photoisomerizations occur in the rigid solvent at liquid nitrogen temperature.

The spectra and molar extinction coefficients have been determined at room temperature for trans azobenzene in ethanol and P.Me.H. Other spectra were taken of azobenzene: at the photostationary state, at room temperature in ethanol and P.Me.H., and at 77°K in P.Me.H.; at 77°K of 100 % and 77 % trans in P.Me.H.

It has been shown that the photoisomerization occurs more readily by irradiation in the visible, than in the ultraviolet region. A new low temperature cell has been designed and used.
How Guided Pathways Reforms Can Improve Support for Adult Students: Lessons From Three Tennessee Community Colleges
Creators: name: Klempin, Serena Constance
name: Lahr, Hana Elizabeth
Publisher: name: Columbia University
Year: 2021
Subjects: Community colleges
Adult college students--Services for
Community college students--Services for

description: Guided pathways reforms are emerging as a promising strategy for improving student outcomes and closing equity gaps at community colleges, but little is known about how the guided pathways approach can help address challenges facing adult students. This report discusses strategies that three Tennessee community colleges that have implemented guided pathways reforms— Motlow State Community College, Nashville State Community College, and Pellissippi State Community College—are using to support adult students in three core areas: helping students choose and enter a program of study, keeping students on their path, and promoting student learning. The authors also discuss plans the institutions have for the further strengthening of support for adult students. The report draws upon interviews conducted with faculty, student support staff, and administrative staff at the three colleges as well as on focus groups conducted with adult students at each college. Motlow State, Nashville State, and Pellissippi State are providing innovative models for addressing the needs of adult students by including targeted supports within guided pathways reforms. Differing needs within the adult student population and overlapping needs shared by many adult and traditional-age students call for a multi-pronged strategy to support adult students, consisting of: Universal policies and services critical in promoting success for all students, which are embedded in guided pathways reforms (e.g., mandatory college onboarding activities, career and program exploration, advising). Targeted supports recognizing the challenges and opportunities of adult learners (e.g., flexible scheduling, designated point of contact for adult students, family-friendly spaces and events). Personalized supports tailored to the needs of adults as individuals (e.g., mentoring and coaching, intake surveys to identify students’ needs and interests).
Tendon enthesis positional recruitment model
Creators: name: Golman, Michael
name: Genin, Guy
name: Thomopoulos, Stavros
Publisher: name: Columbia University
Year: 2021
Subjects: Orthopedic surgery
Tendons
Joints

description: A mathematical model was developed to describe the mechanics of the tendon enthesis across a range of joint orientations and geometries. This zip file contains all relevant code for the simulations in this paper. The MATLAB codes are as follow: 1) WORKING_V5_Postural_RecruitmentModel.m — runs the positional recruitment model with specified parameters 2) WORKING_V5_Normalized_Postural_RecruitmentModel.m — Normalizes outputs of WORKING_V5_Postural_RecruitmentModel.m — currently set up for the case of loading at a 90° abduction angle — this code was used for producing the normalized plots in the paper 3) V5p2_ANGLE_Batch_analysis_WORKING_Postural_RecruitmentModel.m — this code runs WORKING_V5_Normalized_Postural_RecruitmentModel.m over a range of loading directions — the code was used to generate figures for toughness gain versus strength loss 4) V5Batch_analysis_WORKING_Postural_RecruitmentModel.m — runs working_v5 over range of fiber spacing — the code was used to generate the supplemental figures 5) Analysis_Code_Material.m, modulusCalc.m, and resil_tough.m — three codes for analyzing experimental force-displacement data — place all three in a single directory, and run analysis_code_material.m with the name of the input file added to this code
Disorder-induced instability of a Weyl nodal loop semimetal towards a diffusive topological metal with protected multifractal surface states
Creators: name: Silva, João S.
name: Gonçalves, Miguel
name: Castro, Eduardo V.
name: Ribeiro, Pedro
name: Araújo, Miguel A. N.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Weyl nodal loop semimetals are gapless topological phases that, unlike their insulator counterparts, may be unstable to small perturbations that respect their topology-protecting symmetries. Here, we analyze a clean system perturbed by chiral off-diagonal disorder using numerically exact methods. We establish that the ballistic semimetallic phase is unstable towards the formation of an unconventional topological diffusive metal hosting topological multifractal surface states. Although, as in the clean case, surface states are exponentially localized along the direction perpendicular to the nodal loop, disorder induces a multifractal structure in the remaining directions. Surprisingly, the number of these states also increases with a small amount of disorder. Eventually, as disorder is further increased, the number of surface states starts decreasing.
New techniques for chargino-neutralino detection at LHC
Creators: name: Cabrera, Maria Eugenia
name: Casas, J. Alberto
name: Zaldivar, Bryan
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The recent LHC discovery of a Higgs-like boson at 126 GeV has important consequences for SUSY, pushing the spectrum of strong-interacting supersymmetric particles to high energies, very difficult to probe at the LHC. This gives extra motivation to study the direct production of electroweak particles, as charginos and neutralinos, which are presently very poorly constrained. The aim of this work is to improve the analysis of chargino-neutralino pair production at LHC, focusing on the kinematics of the processes. We propose a new method based on the study of the poles of a certain kinematical variable. This complements other approaches, giving new information about the spectrum and improving the signal-to-background ratio. We illustrate the method in particular SUSY models, and show that working with the LHC at 100/fb luminosity one would be able to distinguish the SUSY signal from the Standard Model background.
description: accepted for publication in JHEP
Thermomorphic Hydrophilicity Base-Induced Precipitation for Effective Descaling of Hypersaline Brines
Creators: name: Boo, Chanhee
name: Qi, Heyang
name: BIllinge, Ian Henry
name: Shah, Kinnari Malav
name: Fan, Hanqing
name: Yip, Ngai Yin
Publisher: name: Columbia University
Year: 2021
Subjects: subject: Saline water conversion
subject: Amines
subject: Precipitation (Chemistry)
subject: Water chemistry
subject: Environmental engineering
subject: FOS: Environmental engineering

description: This study presents a novel technology, termed thermomorphic hydrophilicity base-induced precipitation (THBIP), for the effective removal of hardness ions from hypersaline brines with high-scaling propensity. THBIP utilizes thermoresponsive amine bases for the controlled precipitation of scaling constituents in alkaline conditions and subsequently uses low-temperature heat to trigger the phase separation of amine from aqueous solution, thus enabling reuse of the base. Three amines exhibiting distinct water solubility and basicity, specifically, diisopropylamine (DIPA), N-ethylcyclohexylamine (ECHA), and N,N-dimethylisopropylamine (DMIPA), were examined to identify the key parameters affecting THBIP performance. The amine bases were added to solutions containing hardness ions, Mg2+ or Ca2+, to induce the precipitation of hydroxide minerals (i.e., Mg(OH)2(s) and Ca(OH)2(s)). All three amines are effective in increasing solution pH, leading to high Mg2+ removals of over 90%. But because Ca(OH)2(s) is relatively more soluble, only DIPA, which is both highly miscible in water and also the strongest base, obtained significant removal of Ca2+ ions (>33%). The observed precipitation and hardness removal are quantitatively consistent with the principles of aqueous chemistry. Using a simulated hypersaline feedwater (240 g/L total dissolved solids) of high-scaling propensity, THBIP with DIPA achieved ∼80% hardness removal. Subsequent elevation of the temperature from 15 to 70 °C triggered demixing of the thermoresponsive base from the aqueous solution, to enable liquid–liquid separation for amine reuse. The study demonstrates the proof-of-concept of using thermomorphic hydrophilicity bases as an alternative strategy to effectively reduce the scaling potential of hypersaline brines.
Religion, National Identity and Heritage Tourism: Illustrating the Indian Experiences
Creators: name: Gantait, Arnab
name: Priyakrushna Mohanty
Publisher: name: Zenodo
Year: 2021

description: Presented the paper titled, “Religion, National Identity, and Heritage Tourism: Illustrating the Indian Experiences” in the International Conference on Convergence and Divergence: Indian Literature in a Global Context—Canadian and Indian Perspectives, organized by Shastri Indo-Canadian Institute, New Delhi & Department of English, School of Humanities, Pondicherry University, India, held on 30th Aug – 31st Aug 2018.
GMRT discovery of PSR J1544+4937, an eclipsing black-widow pulsar identified with a Fermi LAT source
Creators: name: Bhattacharyya, B.
name: Roy, J.
name: Ray, P. S.
name: Gupta, Y.
name: Bhattacharya, D.
name: Romani, R. W.
name: Ransom, S. M.
name: Ferrara, E. C.
name: Wolff, M. T.
name: Camilo, F.
name: Cognard, I.
name: Harding, A. K.
name: Hartog, P. R. den
name: Johnston, S.
name: Keith, M.
name: Kerr, M.
name: Michelson, P. F.
name: Parkinson, P. M. Saz
name: Wood, D. L.
name: Wood, K. S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Using the Giant Metrewave Radio Telescope (GMRT) we performed deep observations to search for radio pulsations in the directions of unidentified Fermi Large Area Telescope (LAT) gamma-ray sources. We report the discovery of an eclipsing black-widow millisecond pulsar, PSR J1544+4937, identified with the un-cataloged gamma-ray source Fermi J1544.2+4941. This 2.16 ms pulsar is in a 2.9 hours compact circular orbit with a very low-mass companion (Mc > 0.017 Msun). At 322 MHz this pulsar is found to be eclipsing for 13% of its orbit, whereas at 607 MHz the pulsar is detected throughout the low-frequency eclipse phase. Variations in the eclipse ingress phase are observed, indicating a clumpy and variable eclipsing medium. Moreover, additional short-duration absorption events are observed around the eclipse boundaries. Using the radio timing ephemeris we were able to detect gamma-ray pulsations from this pulsar, confirming it as the source powering the gamma-ray emission.
description: 15 pages, 4 figures, 1 table, accepted for publication in ApJ Letters
Anatomy of a Local‐Scale Drought: Application of Assimilated Remote Sensing Products, Crop Model, and Statistical Methods to an Agricultural Drought Study
Creators: name: Mishra, Ashok K.
name: Ines, Amor Valeriano M.
name: Das, Narendra N.
name: Khedun, Prakash
name: Singh, Vijay P.
name: Sivakumar, Bellie
name: Hansen, James W.
Publisher: name: Columbia University
Year: 2015
Subjects: Droughts
Droughts--Remote sensing
Soil moisture
Agriculture
Crop yields
Copulas (Mathematical statistics)

description: Drought is of global concern for society but it originates as a local problem. It has a significant impact on water quantity and quality and influences food, water, and energy security. The consequences of drought vary in space and time, from the local scale (e.g. county level) to regional scale (e.g. state or country level) to global scale. Within the regional scale, there are multiple socio-economic impacts (i.e., agriculture, drinking water supply, and stream health) occurring individually or in combination at local scales, either in clusters or scattered. Even though the application of aggregated drought information at the regional level has been useful in drought management, the latter can be further improved by evaluating the structure and evolution of a drought at the local scale. This study addresses a local-scale agricultural drought anatomy in Story County in Iowa, USA. This complex problem was evaluated using assimilated AMSR-E soil moisture and MODIS-LAI data into a crop model to generate surface and sub-surface drought indices to explore the anatomy of an agricultural drought. Quantification of moisture supply in the root zone remains a gray area in research community, this challenge can be partly overcome by incorporating assimilation of soil moisture and leaf area index into crop modeling framework for agricultural drought quantification, as it performs better in simulating crop yield. It was noted that the persistence of subsurface droughts is in general higher than surface droughts, which can potentially improve forecast accuracy. It was found that both surface and subsurface droughts have an impact on crop yields, albeit with different magnitudes, however, the total water available in the soil profile seemed to have a greater impact on the yield. Further, agricultural drought should not be treated equal for all crops, and it should be calculated based on the root zone depth rather than a fixed soil layer depth. We envisaged that the results of this study will enhance our understanding of agricultural droughts in different parts of the world.
The Historical Role of Communications Networks: A Conversation
Creators: name: John, Richard R.
name: Jin, Gengxing
Publisher: name: Columbia University
Year: 2021
Subjects: Communication
Information theory
Telecommunication
Information technology
History

description: This article is an abridged transcript of an interview with Richard R. John that was conducted for the Chinese Communications Studies Review. The interviewer was Gengxing Jin, an assistant professor of media and communications at the University of Shanghai for Science and Technology.
Holographic applications of logarithmic conformal field theories
Creators: name: Grumiller, D.
name: Riedler, W.
name: Rosseel, J.
name: Zojer, T.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We review the relations between Jordan cells in various branches of physics, ranging from quantum mechanics to massive gravity theories. Our main focus is on holographic correspondences between critically tuned gravity theories in Anti-de Sitter space and logarithmic conformal field theories in various dimensions. We summarize the developments in the past five years, include some novel generalizations and provide an outlook on possible future developments.
description: 36 pp + references, invited review article for J.Phys.A special issue, v2: minor changes, added refs
Die Bedeutung des Lateinischen in einer sich wandelnden Romanistik
Creators: name: Müller-Lancé, Johannes
Publisher: name: Pegasus-Onlinezeitschrift
Year: 2017

description: Seit ihrer Begründung als Fachwissenschaft galt die deutschsprachige Romanistik als sichere „Bank“ für das Lateinische. Ein Studium oder gar eine berufliche Karriere in der Romanischen Philologie war über viele Jahrzehnte ohne fundierte Lateinkenntnisse nicht nur undenkbar, sondern auch durch Prüfungsordungen unmöglich gemacht.
 Diese Bank aber bröckelt seit einigen Jahren: Zum einen dadurch, dass die Romanistik zunehmend in ihre Einzeldisziplinen zerfällt (Sprach- vs. Literaturwissenschaft bzw. Französisch vs. Italienisch vs. Spanisch etc.) und die historische Dimension in Lehre und Forschung immer weniger Raum einnimmt, zum anderen durch die Umstellung der Studiengänge im Rahmen des sog. „Bologna-Prozesses“.
 Der Artikel zeigt auf, in welchen Bereichen der Romanistik nach wie vor auf Lateinkenntnisse zurückgegriffen werden kann und muss. Weiterhin wird darauf eingegangen, wie ein Lateinkurs aussehen könnte, der sich an romanistischen Interessen orientiert.
description: Pegasus-Onlinezeitschrift, Bd. 9, Nr. 1 (2009): Pegasus-Onlinezeitschrift
title: Non-Grid Opportunistic Resources for (Big Data) Volunteer Computing
Creators: name: Rashid, Md Mamunur
name: NA
Publisher: name: University of Kent
Year: 2017

description: CPU-intensive computing at LHC (The Large Hadron Collider) requires collaborative distributed computing resources to accomplish its data reconstruction and analysis. Currently, institutional Grid is trying to manage and process large datasets within limited time and cost. The baseline paradigm is now well established to use the Computing Grid and more specifically the WLCG (Worldwide LHC Computing Grid) and its supporting infrastructures. In order to achieve its Grid Computing, LHCb has developed a Community Grid Solution called DIRAC (Distributed Infrastructure with Remote Agent Control). It is based on a pilot job submission system to the institutional Grid infrastructures. However, there are other computing resources like idle desktops (e.g. SETI@home), the idle computing cluster (e.g. CERN's Online selection farm outside data-taking periods by LHC detectors) that could be used outside the Grid infrastructures. Because of their lightweight, in particular, simulation activities could benefit from using those opportunistic resources. The DIRAC architecture allows the use of the existing institutional grid resources. To expand the capability of existing computing powers, I have proposed to integrate opportunistic resources in the distributed computing system (DIRAC). In order, not to be dependent on the local settings for the worker node at the external resource, I propose using virtual machines. The architectural modifications required for DIRAC are presented here, with specific examples for data analyses non-Grid clusters. This solution was achieved by making the necessary changes in 3 state-of-the-art technologies: DIRAC, CernVM and OpenNebula. The combination of these three techniques is referred to as the DiCON architecture. I am referring the new approach as a framework rather than a specific technical solution to a specific scientific problem as this can be reused in similar big data analysis environment. I have also shown how this was used to analyse large-scale climate data. This was a rather challenging to use one developed infrastructure to another research area. I have also proposed to use dataflow architecture to exploit the possibilities of opportunistic resources and in the meantime, establish reliability and stability. Dataflow computing architecture in a virtual environment is seen as a possible future research extension of this work. This is a theoretical contribution only and this is a unique approach in a virtual cloud (not in-house computing) environment. This paradigm could give the scientific community access to a large number of non- conventional opportunistic CPU resources for scientific data processing. This PhD work optimises the challenges and the solutions provided by such a computing infrastructure.
Symmetry protected weak topological phases in a superlattice
Creators: name: Fukui, T.
name: Imura, K. -I.
name: Hatsugai, Y.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We explore novel topological phases realized in a superlattice system based on the Wilson-Dirac model. Our main focus is on a two-dimensional analogue of weak topological insulator phases. We find such phases as those characterized by gapless edge states that are protected by symmetry but sensitive to the orientation of the edge relative to the superlattice structure. We show that manifest and hidden reflection symmetries protect such weak topological phases, and propose bulk Z2 indices responsible for the topological protection of the edge states.
description: 5 pages, 3 figures, final version
Volume-entangled exact scar states in the PXP and related models in any dimension
Creators: name: Ivanov, Andrew N.
name: Motrunich, Olexei I.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: In this Letter, we report first exact volume-entangled Einstein-Podolsky-Rosen--type scar states hosted by PXP and related Hamiltonians corresponding to various geometric configurations of Rydberg-blockaded atom systems, including the most extensively studied ones such as the chain with periodic boundary conditions (PBCs) and square lattice. We start by introducing a new zero-energy eigenstate of the PBC chain and proceed by generalizing it to a wide variety of geometries and Hamiltonians. We point out the potential experimental relevance of our states by providing a protocol for their preparation on near-term Rydberg quantum devices, which relies only on strictly local measurements and evolution under native Hamiltonians. We also demonstrate the utility of these states for the study of quantum dynamics by describing a protocol for measuring infinite-temperature out-of-time-order correlator functions.
description: 5+19 pages, 3+11 figures
Publicity, Propaganda, and Public Opinion: From the Titanic Disaster to the Hungarian Uprising
Creators: name: John, Richard R.
name: Tworek, Heidi J. S.
Publisher: name: Columbia University
Year: 2021
Subjects: Information theory
Propaganda
Public opinion
Publicity
Government information agencies
Newspapers
Radio broadcasting

description: This essay traces the shifting understanding of the Enlightenment truism that improving popular access to information is a public good. It spans the "age of radio"--an epoch that can be said to have begun in 1912, the year of the Titanic disaster, and to have ended in 1956, the year in which US-backed radio broadcasts failed to catalyze a political revolution in communist Hungary. Technical advances in information technology, of course, continued after 1956; they included, in particular, the widespread commercialization of the digital computer, the technical advance most central to today's information age. In some quarters, the Enlightenment faith in the emancipatory promise of information never died. Yet the age of radio remains a watershed in the history of information. For it challenged, without entirely undermining, the Enlightenment faith that technical advance in information technology could bring moral progress. This challenge can be traced by examining the evolution of three media genres--publicity, propaganda, and public opinion--and three media organizations--the metropolitan newspaper, the government messaging agency, and the radio broadcasting station. In particular, we examine how media insiders--political leaders, government officials, business elites, journalists, and social scientists--understood the relationship between publicity, propaganda, and public opinion.
Targeting Repeat Sequences with DNA-Binding Small Molecules
Creators: name: Chevillet, John Richard
Publisher: name: California Institute of Technology
Year: 2002
Subjects: Chemistry

description: Recognition of repeat sequences in DNA would have applications in molecular biology. One of the most biologically interesting repeat sequences is the telomeric repeat which composes the ends of eukaryotic chromosomes; in vertebrates 5'-TTAGGG-3'. This sequence has been used as a model to study how DNA-binding polyamide molecules composed of pyrrole (Py) and imidazole (Im) residues bind to repeating sequences. DNase I footprinting shows that the polyamide-fluorophore conjugate IrnImImPy-γ-PyPy((CH_2)_3N,N',N''trimethylbis  hexamethylene)triamineOregonGreen488) PyPy-β-Me can bind the sequence 5'-AGGGTT-3' K_a = 1.8x10^8 M^(-1).
Quantitative fluorescence titrations with varying patterns of telomeric repeat suggest that the molecule can tolerate another polyamide binding contiguously, but not two.
Truncation of the tail of the conjugate to yield the molecule ImImImPy-γ-Py Py((CH_2)_3N,N',N''trimethylbis (hexamethylene)triamine-OregonGreen488) PyPy-Me allows the compound to bind three contiguous sites, suggesting that steric polyamide-polyamide interactions control binding in this manner.
The Role of Service Quality and Its Relationship with Destination Loyalty: A Case Study on Hodka Village, Gujarat
Creators: name: Gantait, Arnab
name: Singh, Kuldeep
Publisher: name: Zenodo
Year: 2021

description: Presented the paper titled, “The Role of Service Quality and Its Relationship with Destination Loyalty: A Case Study on Hodka Village, Gujarat” in the International Conference on Sustainable Tourism and Hospitality Marketing: Setting Agenda for Future Research (STHMCON-2018), organized by Dept. of Tourism and Hotel Management, North-Eastern Hill University, Shillong, Meghalaya, India held on 15th March – 17th March, 2018.
Molecular Hydrogen in the Damped Lyman-alpha System towards GRB 120815A at z=2.36
Creators: name: Krühler, T.
name: Ledoux, C.
name: Fynbo, J. P. U.
name: Vreeswijk, P. M.
name: Schmidl, S.
name: Malesani, D.
name: Christensen, L.
name: De Cia, A.
name: Hjorth, J.
name: Jakobsson, P.
name: Kann, D. A.
name: Kaper, L.
name: Vergani, S. D.
name: Afonso, P. M. J.
name: Covino, S.
name: Postigo, A. de Ugarte
name: D'Elia, V.
name: Filgas, R.
name: Goldoni, P.
name: Greiner, J.
name: Hartoog, O. E.
name: Milvang-Jensen, B.
name: Nardini, M.
name: Piranomonte, S.
name: Rossi, A.
name: Sánchez-Ramírez, R.
name: Schady, P.
name: Schulze, S.
name: Sudilovsky, V.
name: Tanvir, N. R.
name: Tagliaferri, G.
name: Watson, D. J.
name: Wiersema, K.
name: Wijers, R. A. M. J.
name: Xu, D.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present the discovery of molecular hydrogen (H_2), including the presence of vibrationally-excited H_2^* in the optical spectrum of the afterglow of GRB 120815A at z=2.36 obtained with X-shooter at the VLT. Simultaneous photometric broad-band data from GROND and X-ray observations by Swift/XRT place further constraints on the amount and nature of dust along the sightline. The galactic environment of GRB 120815A is characterized by a strong DLA with log(N(H)/cm^-2) = 21.95 +/- 0.10, prominent H_2 absorption in the Lyman-Werner bands (log(N(H_2)/cm^-2) = 20.53 +/- 0.13) and thus a molecular gas fraction log f(H_2)=-1.14 +/- 0.15. The distance d between the absorbing neutral gas and GRB 120815A is constrained via photo-excitation modeling of fine-structure and meta-stable transitions of FeII and NiII to d = 0.5 +/- 0.1 kpc. The DLA metallicity ([Zn/H] = -1.15 +/- 0.12), visual extinction (A_V < 0.15 mag) and dust depletion ([Zn/Fe] = 1.01 +/- 0.10) are intermediate between the values of well-studied, H_2-deficient GRB-DLAs observed at high spectral resolution, and the approximately solar metallicity, highly-obscured and H_2-rich GRB 080607 sightline. With respect to N(H), metallicity, as well as dust-extinction and depletion, GRB 120815A is fairly representative of the average properties of GRB-DLAs. This demonstrates that molecular hydrogen is present in at least a fraction of the more typical GRB-DLAs, and H_2 and H_2^* are probably more wide-spread among GRB-selected systems than the few examples of previous detections would suggest.
description: 21 pages, 14 figures, accepted for publication in A&A
Individual project on theme "Ambrosia L." (MOOC: CompTech in biology)
Creators: name: Zubova Kristina
Publisher: name: Zenodo
Year: 2020

description: Данный кейс является результатом реализации индивидуального проекта Зубовой Кристины по теме "Ambrosia L." в рамках онлайн курса "Компьютерные технологии в биологии" (автор – А.В. Ваганов) (https://stepik.org/course/60859/promo)
Analyzing the "Silk Road" in Latin America The Belt and Road Initiative: China-Panama Relations and Economic Implications
Creators: name: Apata, Olufemi
Publisher: name: Columbia University
Year: 2021
Subjects: Investments, Foreign
Debts, Public
Fiscal policy
Economic policy

description: Most recent studies on the Belt and Road Initiative's (BRI) impacts have focused on beneficiary countries' political economies. This paper examines how the BRI - China's foreign and economic development policy for global interconnectivity- affects debt sustainability in signatory nations like Panama. Undoubtedly, many opportunities exist for BRI participants, yet, the initiative's specific impact remains debatable, complicated in part by a dearth of empirical evidence as well as assumptions about China's political and economic motives. Panama and 19 other Latin American and Caribbean (LAC) countries recently joined the BRI, aiming for economic growth from Chinese investment inflow. In these countries, the initiative can facilitate value-added foreign direct investments (FDI), enhance trade, improve infrastructure, and provide access to low-interest developmental loans. Conversely, it can contribute to a large-scale trade disturbance creating political and economic uncertainty while making participation in the initiative risky or otherwise problematic. Similarly, the BRI-led focus on partnership with America's regional allies can impact US-LAC relations, creating geostrategic security and economic risks in the region. This research analyzes BRI's economic impact in LAC using a mixed-method approach. The analyses rely on data retrieved from the debt sustainability reports from the World Bank and the International Monetary Fund (IMF). The project has two goals: First, it examines BRI's debt risks and their impacts on Panama without obscuring the economic benefits. Second, it assesses BRI's economic and security implications on the US-Panama relation. By evaluating the BRI and its impacts on Panama's economy within the LAC context, this research concludes that Panama stands to benefit from the BRI. However, without Panama enacting sound fiscal and economic policies, the BRI poses substantive consequences of debt distress to its economy. Although this research suggests linkages between BRI roles on debt sustainability, understanding these roles' micro-level dynamics in Panama and LAC will require empirical evidence and further investigation. Keywords: Belt and Road Initiative, debt, Latin America, geostrategic, Panama, IMF, infrastructure, foreign policy, risks, diplomatic, foreign direct investment, World Bank