cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Hardy--Littlewood conjecture and rational points
Creators: name: Harpaz, Yonatan
name: Skorobogatov, Alexei N.
name: Wittenberg, Olivier
Publisher: name: arXiv
Year: 2013
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 14G05, 11D57

description: Schinzel's Hypothesis (H) was used by Colliot-Thélène and Sansuc, and later by Serre, Swinnerton-Dyer and others, to prove that the Brauer-Manin obstruction controls the Hasse principle and weak approximation on pencils of conics and similar varieties. We show that when the ground field is Q and the degenerate geometric fibres of the pencil are all defined over Q, one can use these methods to obtain unconditional results by replacing Hypothesis (H) with the finite complexity case of the generalised Hardy-Littlewood conjecture recently established by Green, Tao and Ziegler.
description: 19 pages; minor changes, final version
$\textit{In situ}$ hydride breathing during the template-assisted electrodeposition of Pd nanowires
Creators: name: Abbondanza, Giuseppe
name: Grespi, Andrea
name: Larsson, Alfred
name: Dzhigaev, Dmitry
name: Glatthaar, Lorena
name: Weber, Tim
name: Blankenburg, Malte
name: Hegedüs, Zoltan
name: Lienert, Ulrich
name: Over, Herbert
name: Harlow, Gary S.
name: Lundgren, Edvin
Publisher: name: arXiv
Year: 2022
Subjects: subject: Applied Physics (physics.app-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We investigated the structural evolution of electrochemically fabricated Pd nanowires $\textit{in situ}$ by means of grazing-incidence transmission small- and wide-angle x-ray scattering (GTSAXS and GTWAXS), x-ray fluorescence (XRF) and 2-dimensional surface optical reflectance (2D-SOR). This shows how electrodeposition and the hydrogen evolution reaction (HER) compete and interact during Pd electrodepositon. During the bottom-up growth of the nanowires, we show that $β$-phase Pd hydride is formed. Suspending the electrodeposition then leads to a phase transition from $β$- to $α$-phase Pd hydride. Additionally, we find that grain coalescence later hinders the incorporation of hydrogen in the Pd unit cell. GTSAXS and 2D-SOR provide complementary information on the volume fraction of the pores occupied by Pd, while XRF was used to monitor the amount of Pd electrodeposited.
description: 17 pages, 11 figures, 4 appendices
Marion Giebel. Tiere in der Antike. Von Fabelwesen, Opfertieren und treuen Begleitern
Creators: name: Börding, Cornelia Lütke
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: Marion Giebel. Tiere in der Antike. Von Fabelwesen, Opfertieren und treuen Begleitern. Darmstadt, Wissenschaftliche Buchgesellschaft 2003. 235 S., (ISBN 3-806-21783-1).
description: Forum Classicum, Nr. 2 (2004): Forum Classicum
title: Αναγνώριση του μοντέλου του απλού εκκρεμούς με τη χρήση ασαφών γνωστικών χαρτών (FCM Fuzzy Cognitive Maps)
Creators: name: Πάττας Γεώργιος
Publisher: name: Technical University of Crete
Year: 2009

description: Μη διαθέσιμο
title: A simple extension of the commonly used fitting equation for oscillatory structural forces in case of silica nanoparticle suspensions
Creators: name: Schön, Sebastian
name: Klitzing, Regine von
Publisher: name: Beilstein-Institut
Year: 2021

description: Background: The ordering of molecules or particles in the vicinity of a confining surface leads to the formation of an interfacial region with layers of decreasing order normal to the confining surfaces. The overlap of two interfacial regions gives rise to the well-known phenomenon of oscillatory structural forces. These forces are commonly fitted with an exponentially decaying harmonic oscillation as introduced by Israelachvili (Israelachvili, J. N. Intermolecular & surface forces; Academic Press: San Diego, CA, USA, 1985). From the fit three important parameters are obtained, namely wavelength, amplitude and decay length, which are related to the period, the strength and the correlation length of the oscillatory structural forces, respectively. The paper addresses structural forces between a silica microsphere and a silicon wafer across silica nanoparticle suspensions measured with a colloidal probe AFM. Using the simple fitting procedure with three parameters often leads to underestimation of actually measured forces. The deviation of the fit from the experimental data is especially pronounced at small distances of the confining surfaces and at high concentrations of silica nanoparticles. As a consequence, the parameters of the common fit equation vary with the starting point of the fit. Although the wavelength is least affected and seems to be quite robust against the starting point of the fit, all three parameters show distinct oscillations, with a period similar to the wavelength of the oscillatory structural forces themselves. The oscillations of amplitude and decay length, which are of much higher magnitude, show a phase shift of 180° implying not only a dependence on the starting point of the fit but also on each other. The range affected by this systematic deviation of the fit parameters is much larger than the optically perceived mismatch between fit and experimental data, giving a false impression of robustness of the fit. Results: By introducing an additional term of exponentially decaying nature the data can be fitted accurately down to very small separations and even for high silica nanoparticle concentrations (10 wt %). Furthermore wavelength, amplitude and decay length become independent of the starting point of the fit and in case of the latter two of each other. The larger forces at small separations indicate a more pronounced ordering behavior of the particles in the final two layers before the wall. This behavior is described by the proposed extension of the common fit equation. Conclusion: Thus, the extension increases the accessible data range in terms of separation and concentration and strongly increases the accuracy for all fitting parameters in the system studied here.
Gulf Coast parents speak: children’s health in the aftermath of the Deepwater Horizon oil spill
Creators: name: Beedasy, Jaishree
name: Petkova, Elisaveta P.
name: Lackner, Stephanie
name: Sury, Jonathan
Publisher: name: Columbia University
Year: 2020
Subjects: Oil spills--Health aspects
Child disaster victims
Children--Health and hygiene
Child mental health
Emergency management
BP Deepwater Horizon Explosion and Oil Spill (2010)

description: This paper examines the physical and mental health of children following the Deepwater Horizon oil spill (DHOS). A multi-stage sampling design was used to select households for inclusion in the study. Data were obtained from parental interviews (n = 720) in the harder-hit areas of Louisiana in the US Gulf Coast. Three out of five parents reported that their child had experienced physical health symptoms and nearly one third reported that their child had mental health issues since the oil spill. Both direct physical exposure and indirect economic exposure were found to be predictors of physical and mental health issues among the children. Our findings contribute to bridge the research gap on the impacts of the direct and indirect exposures of the DHOS on the health of children. The study underscores the importance of understanding the health and recovery trajectories of children and youth exposed to disasters. Knowledge gained from this study together with the emerging literature on the effect of the oil spill disaster on children can contribute towards more evidence-based public health policies and enhance the recovery of children and their families in the aftermath of disasters.
Numerical solution of the integral form of the resummed Balitsky-Kovchegov equation
Creators: name: Kutak, Krzysztof
name: Placzek, Wieslaw
name: Toton, Dawid
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The Balitsky--Kovchegov (BK) evolution equation in its resummed integral form as obtained in JHEP 1202 (2012) 117 and arXiv:1206.1223 is considered. We solve it numerically and compare to the unresummed BK equation formulated as an integral equation and to the solution obtained by the BKsolver package. Sensitivity of the solution to an introduced resolution parameter and initial conditions is investigated.
description: 9 pages, typos corrected. Accepted for publication in Acta Physica Polonica B
Gauged Linear Sigma Model for Exotic Five-brane
Creators: name: Kimura, Tetsuji
name: Sasaki, Shin
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study an N=(4,4) supersymmetric gauged linear sigma model which gives rise to the nonlinear sigma model for multi-centered KK-monopoles. We find a new T-duality transformation of the model even in the presence of F-terms. Performing T-duality, we find the gauged linear sigma model whose IR limit describes the exotic 522-brane with B-field.
description: 18 pages, typos correcred
A Review of Management Studies Published in Journal of Business Administration: Bibliometric and Co-word Analysis
Creators: name: Sukrit Vinayavekhin
name: Sasi Chanplakorn
Publisher: name: คณะพาณิชยศาสตร์และการบัญชี มหาวิทยาลัยธรรมศาสตร์
Year: 2021
Subjects: Bibliometric analysis
Journal of Business Administration
Content analysis
Co-word analysis
Research trends
Bibliometric Review

description: วารสารบริหารธุรกิจ JBA, 44, 170 (เม.ย.-มิ.ย. 64), 55
Strong Subadditivity, Null Energy Condition and Charged Black Holes
Creators: name: Caceres, Elena
name: Kundu, Arnab
name: Pedraza, Juan F.
name: Tangarife, Walter
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Using the Hubeny-Rangamani-Takayanagi (HRT) conjectured formula for entanglement entropy in the context of the AdS/CFT correspondence with time-dependent backgrounds, we investigate the relation between the bulk null energy condition (NEC) of the stress-energy tensor with the strong sub-additivity (SSA) property of entanglement entropy in the boundary theory. In a background that interpolates between an AdS to an AdS-Reissner-Nordstrom-type geometry, we find that generically there always exists a critical surface beyond which the violation of NEC would naively occur. However, the extremal area surfaces that determine the entanglement entropy for the boundary theory, can penetrate into this forbidden region only for certain choices for the mass and the charge functions in the background. This penetration is then perceived as the violation of SSA in the boundary theory. We also find that this happens only when the critical surface lies above the apparent horizon, but not otherwise. We conjecture that SSA, which is thus non-trivially related to NEC, also characterizes the entire time-evolution process along which the dual field theory may thermalize.
description: 27 pages, v3 matches the published version
Unsupervised extraction, labelling and clustering of segments from clinical notes
Creators: name: Zelina, Petr
name: Halámková, Jana
name: Nováček, Vít
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: This work is motivated by the scarcity of tools for accurate, unsupervised information extraction from unstructured clinical notes in computationally underrepresented languages, such as Czech. We introduce a stepping stone to a broad array of downstream tasks such as summarisation or integration of individual patient records, extraction of structured information for national cancer registry reporting or building of semi-structured semantic patient representations for computing patient embeddings. More specifically, we present a method for unsupervised extraction of semantically-labelled textual segments from clinical notes and test it out on a dataset of Czech breast cancer patients, provided by Masaryk Memorial Cancer Institute (the largest Czech hospital specialising in oncology). Our goal was to extract, classify (i.e. label) and cluster segments of the free-text notes that correspond to specific clinical features (e.g., family background, comorbidities or toxicities). The presented results demonstrate the practical relevance of the proposed approach for building more sophisticated extraction and analytical pipelines deployed on Czech clinical notes.
description: To be published at the IEEE BIBM 2022 conference
Neem seed oil and gum arabic-based oil-in-water emulsions as potential ocular drug delivery system
Creators: name: Quereshi, Dilshad
name: Dhal, Somali
name: Das, Debasis
name: Mohanty, Biswaranjan
name: Anis, Arfat
name: Shaikh, Hamid
name: Nguyen, Thi Thanh Hanh
name: Kim, Doman
name: Sarkar, Preetam
name: Pal, Kunal
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biophysics
subject: Biochemistry
subject: Space Science
subject: Medicine
subject: Molecular Biology
subject: Pharmacology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Computational Biology

description: The present study deciphers the synthesis and characterization of the neem seed oil (NSO) and gum arabic (GA) based emulsion. The synthesized emulsions were thoroughly characterized for probable application in ocular drug delivery. The synthesized emulsions were white in color. The FTIR spectroscopy divulged that the glycoprotein complex of GA retained its functional architecture. The formation of the oil-in-water emulsion was confirmed by confocal microscopy. The NSO droplets in the emulsions behaved as capacitive elements whose properties altered as the composition of the emulsions were varied. The mechanical studies suggested that the interactions within the emulsion components tailored the polymer-polymer integrity under stress. The drug release and corneal permeation studies using ciprofloxacin HCl-loaded emulsions indicated that the ciprofloxacin molecules were released from the emulsions, and the emulsions were able to deliver the drug across the corneal tissue. The prepared emulsions were nonirritant to the ocular tissues. The released drug was capable of inhibiting the growth of the model bacteria (Staphylococcus aureus). In gist, the prepared emulsions were suitable for ocular drug delivery applications.
title: SimplePL: an OpenCL-like runtime system for HLS OpenCL Kernels
title: SimplePL: ένα Runtime σύστημα παρόμοιο της OpenCL για HLS OpenCL Kernels
Creators: name: Γραμματοπουλος Αθανασιος-Βασιλειος
Publisher: name: Technical University of Crete
Year: 2017

description: SimplePL is a runtime system that features an OpenCL-like application programming interface to interact with high level synthesis OpenCL kernels on your programmable logic. The system consists of a C Library that interacts with Linux kernel modules. SimplePL simplifies the development of Linux applications that use HLS OpenCL kernels. Applications can program the PL with pre-compiled bitfiles on demand and call it's HLS kernels IP cores through the library in a similar way an OpenCL application calls OpenCL kernels. SimplePL can schedule the workload on the available IP cores, manage the physical and the virtual addresses of the PL's units, create and manage memory buffers, handle the low level communication between the application and the PL and all these by hiding all the complexity of the programmer.
Harmonic and Dirac oscillators in a (2+1)-dimensional noncommutative space
Creators: name: Vega, F.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the Harmonic and Dirac Oscillator problem extended to a three-dimensional noncom- mutative space where the noncommutativity is induced by a shift of the dynamical variables with generators of SL(2;R) in a unitary irreducible representation. The Hilbert space gets the structure of a direct product with the representation space as a factor, where there exist operators which realize the algebra of Lorentz transformations. The spectrum of these models are considered in perturbation theory, both for small and large noncommutativity parameters, finding no constraints between coordinates and momenta noncom- mutativity parameters. Since the representation space of the unitary irreducible representations SL(2;R) can be realized in terms of spaces of square-integrable functions, we conclude that these models are equivalent to quantum mechanical models of particles living in a space with an additional compact dimension. PACS: 03.65.-w; 11.30.Cp; 02.40.Gh
description: 7 pages, no figures. arXiv admin note: substantial text overlap with arXiv:1208.6315
title: Asynchronous multi-user detection using inference algorithms
title: Ασύγχρονη εκτίμηση πολλαπλών χρηστών με αλγόριθμους συμπερασμού
Creators: name: Τσετης Ιωαννης
Publisher: name: Technical University of Crete
Year: 2017

description: This work highlights state-of-the-art probabilistic graphical models and infer-
ence algorithms that exploit rather than avoid the symbol-level asynchrony
in multi-user wireless communications. More specically, the recently pro-
posed inference algorithm SigSag is studied, where multiple users transmit
their data packets at the same time and frequency channels, with however
random delays; assuming channel state information (CSI) at the receiver,
linear equations are formed, which produce a probabilistic graphical model
(PGM), amenable to inference algorithms. This work implements the sum-
product belief propagation algorithm on the crafted PGM and a) derives
the message passing equations, b) studies initialization and c) complements
with CSI estimation, using linear minimum mean squared error (LMMSE)
estimator. Performance was tested for 2 or 3 users. It was found that per-
formance was sensitive to initialization, as expected, due to the inherently
loopy nature of the crafted PGM for small packet lengths. On the contrary,
bit error rate (BER) decreases with increasing packet length, at the expense
of convergence time. Moreover, reduced convergence time results to higher
BER.
Flux exchange in inhomogeneous type-II superconductors
Creators: name: Ma, Rongchao
Publisher: name: arXiv
Year: 2013
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The vortex hopping motion in a type-II superconductor determines the current-carrying ability and consequently the application fields of the superconductor. However, it is not clear how the vortices hop between the different pinning regions in the superconductor. Here we proposed that there should be magnetic \textit{flux exchange} between two contacting pinning regions. A system of differential equations was constructed to describe the flux exchange phenomenon. The qualitative analysis methods were used. The approximate numerical solutions and approximate analytical solutions of the system were obtained. The results show that the flux exchange reduces the internal field in a weak pinning region, but increases the internal field in a strong pinning region. Moreover, the flux exchange phenomenon is strongly influenced by the superconductor's geometrical size.
The finiteness problem for automaton semigroups is undecidable
Creators: name: Gillibert, Pierre
Publisher: name: arXiv
Year: 2013
Subjects: subject: Formal Languages and Automata Theory (cs.FL)
subject: Discrete Mathematics (cs.DM)
subject: FOS: Computer and information sciences

description: The finiteness problem for automaton groups and semigroups has been widely studied, several partial positive results are known. However we prove that, in the most general case, the problem is undecidable. We study the case of automaton semigroups. Given a NW-deterministic Wang tile set, we construct an Mealy automaton, such that the plane admit a valid Wang tiling if and only if the Mealy automaton generates a finite semigroup. The construction is similar to a construction by Kari for proving that the nilpotency problem for cellular automata is unsolvable. Moreover Kari proves that the tiling of the plane is undecidable for NW-deterministic Wang tile set. It follows that the finiteness problem for automaton semigroup is undecidable.
On sofic monoids
Creators: name: Ceccherini-Silberstein, Tullio
name: Coornaert, Michel
Publisher: name: arXiv
Year: 2013
Subjects: subject: Dynamical Systems (math.DS)
subject: Functional Analysis (math.FA)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 43A07, 37B15, 68Q80

description: We investigate the notion of soficity for monoids. A group is sofic as a group if and only if it is sofic as a monoid. All finite monoids, all commutative monoids, all free monoids, all cancellative one-sided amenable monoids, all multiplicative monoids of matrices over a field, and all monoids obtained by adjoining an identity element to a semigroup without identity element are sofic. On the other hand, although the question of the existence of a non-sofic group remains open, we prove that the bicyclic monoid is not sofic. This shows that there exist finitely presented amenable inverse monoids that are non-sofic.
description: We have corrected a small mistake in (and then suitably refrmulated) the statement of Theorem 6.1 (we needed the "Left-cancellative" hypothesis on M. It will appear in SEMIGRUOP FORUM
Reckoning with the Mother of all non-Fermi liquids: alien bosonization vs predator holography
Creators: name: Khveshchenko, D. V.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: This note addresses the problem of computing fermion propagators in a broad variety of strongly correlated systems that can be mapped onto the theory of fermions coupled to an (over)damped bosonic mode. A number of the previously applied approaches and their results are reviewed, including the conventional diagrammatic resummation and eikonal technique, as well as the 'experimental' higher dimensional bosonization and generalized (i.e., 'bottom-up' or 'non-AdS/non-CFT') holographic conjecture. It appears that, by and large, those results remain either in conflict or incomplete, thereby suggesting that the ultimate solution to this ubiquitous problem is yet to be found.
description: Latex, 12 pages, few typos corrected
Synthesis, colloidal-chemical and petroleum collecting properties of new counterion coupled gemini surfactants based on hexadecylbis(2-hydroxypropyl)amine and dicarboxylic acids
Creators: name: Asadov, Ziyafaddin H.
name: Huseynova, Saida M.
name: Ahmadova, Gulnara A.
name: Rahimov, Ravan A.
name: Sharbatov, Seyran U.
name: Zubkov, Fedor I.
name: Jafarova, Rana A.
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biophysics
subject: Biochemistry
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: Sociology
subject: FOS: Sociology
subject: Immunology
subject: FOS: Clinical medicine
subject: Plant Biology

description: Eight new cocogem surfactants were obtained as a result of the chemical synthesis between hexadecylbis(2-hydroxypropyl)amine and eight different dicarboxylic acids. Solutions of these cocogem surfactants were prepared at the different concentrations and their surface tension values were measured by Du-Nouy ring method to determine the surface active abilities. Electric conductivity measurements were carried out and, by using the obtained values, very important characteristics of the synthesized surfactants were investigated. The parameters which were determined based on these measurements are critical micelle concentration (CMC), counterion binding degree, surface excess, minimum area occupied by one molecule. Moreover, thermodynamic properties such as Gibbs energy of adsorption and micellization were calculated. It became clear that the spacer group in the surfactant chain strongly influences the properties of the surfactants. By changing the type and the length of the spacer chain, the properties also change considerably. The petroleum collecting ability of the synthesized cocogem surfactants were investigated.
The hard X-ray spectrum of NGC 1365: scattered light, not black hole spin
Creators: name: Miller, L.
name: Turner, T. J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Active Galactic Nuclei (AGN) show excess X-ray emission above 10 keV compared with extrapolation of spectra from lower energies. Risaliti et al. have recently attempted to model the hard X-ray excess in the type 1.8 AGN NGC 1365, concluding that the hard excess most likely arises from Compton-scattered reflection of X-rays from an inner accretion disk close to the black hole. Their analysis disfavored a model in which the hard excess arises from a high column density of circumnuclear gas partially covering a primary X-ray source, despite such components being required in the NGC 1365 data below 10 keV. Using a Monte Carlo radiative transfer approach, we demonstrate that this conclusion is invalidated by (i) use of slab absorption models, which have unrealistic transmission spectra for partial covering gas, (ii) neglect of the effect of Compton scattering on transmitted spectra and (iii) inadequate modeling of the spectrum of scattered X-rays. The scattered spectrum is geometry dependent and, for high global covering factors, may dominate above 10 keV. We further show that, in models of circumnuclear gas, the suppression of the observed hard X-ray flux by reprocessing may be no larger than required by the `light bending' model invoked for inner disk reflection, and the expected emission line strengths lie within the observed range. We conclude that the time-invariant `red wing' in AGN X-ray spectra is probably caused by continuum transmitted through and scattered from circumnuclear gas, not by highly redshifted line emission, and that measurement of black hole spin is not possible.
description: Revised version, accepted for publication by Ap.J. Letters
Shared-Use Infrastructure Along the World's Largest Iron Ore Operation: Lessons Learned from the Carajás Corridor
Creators: name: Brauch, Martin Dietrich
name: Maennling, Nicolas Wolfram
name: Toledano, Perrine
name: Monteiro, Edgar Santos
name: Botelho Tavares, Felipe
Publisher: name: Columbia University
Year: 2020
Subjects: Mining corporations
Public interest
Infrastructure (Economics)--Planning

description: From a government perspective, shared-use or open-access infrastructure arrangements can provide significant prospects for sustainable development. The shared use of infrastructure built by mining companies can spur and support additional mining projects and other economic activities and services to the benefit of surrounding communities and other third-party beneficiaries. From the viewpoint of a mining company, however, such arrangements pose risks to profitability and may, in some instances, benefit competitors. This study uses lessons learned from the shared-use arrangements along the Carajás railway corridor in Brazil to shed light on how to strike a balance between divergent private and public interests, and how countries may learn from this approach in order to increase the benefits of existing and future shared-use projects.
A General Framework for Removing Point Spread Function Additive Systematics in Cosmological Weak Lensing Analysis
Creators: name: Zhang, Tianqing
name: Li, Xiangchong
name: Dalal, Roohi
name: Mandelbaum, Rachel
name: Strauss, Michael A.
name: Kannawadi, Arun
name: Miyatake, Hironao
name: Nicola, Andrina
name: Malagón, Andrés A. Plazas
name: Shirasaki, Masato
name: Sugiyama, Sunao
name: Takada, Masahiro
name: More, Surhud
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Cosmological weak lensing measurements rely on a precise measurement of the shear two-point correlation function (2PCF) along with a deep understanding of systematics that affect it. In this work, we demonstrate a general framework for detecting and modeling the impact of PSF systematics on the cosmic shear 2PCF, and mitigating its impact on cosmological analysis. Our framework can describe leakage and modeling error from all spin-2 quantities contributed by the PSF second and higher moments, rather than just the second moments, using the cross-correlations between galaxy shapes and PSF moments. We interpret null tests using the HSC Year 3 (Y3) catalogs with this formalism, and find that leakage from the spin-2 combination of PSF fourth moments is the leading contributor to additive shear systematics, with total contamination that is an order of magnitude higher than that contributed by PSF second moments alone. We conducted a mock cosmic shear analysis for HSC Y3, and find that, if uncorrected, PSF systematics can bias the cosmological parameters $Ω_m$ and $S_8$ by $\sim$0.3$σ$. The traditional second moment-based model can only correct for a 0.1$σ$ bias, leaving the contamination largely uncorrected. We conclude it is necessary to model both PSF second and fourth moment contamination for HSC Y3 cosmic shear analysis. We also reanalyze the HSC Y1 cosmic shear analysis with our updated systematics model, and identify a 0.07$σ$ bias on $Ω_m$ when using the more restricted second moment model from the original analysis. We demonstrate how to self-consistently use the method in both real space and Fourier space, assess shear systematics in tomographic bins, and test for PSF model overfitting.
description: 33 pages, 28 figures, match the refereed version in MNRAS
Family Resilience Following the Deepwater Horizon Oil Spill: Theory and Evidence
Creators: name: Slack, Tim
name: Beedasy, Jaishree
name: Chandler, Thomas E.
name: Sweet Keating, Kathryn
name: Sury, Jonathan
name: Brooks, Jeremy
Publisher: name: Columbia University
Year: 2020
Subjects: Disasters
Families
Resilience (Personality trait)
Oil spills
BP Deepwater Horizon Explosion and Oil Spill (2010)

description: Family resilience raises the question of how family units adapt to external shocks. One notable form of such shocks are disasters. Research shows that disasters are occurring with greater frequency and severity throughout the world. Natural and human-made hazards pose an ongoing threat to positive family functioning everywhere, making it difficult to ignore the importance of disaster resilience for research and practice concerning family wellbeing. In this chapter, we examine the issue of family resilience in the context of disaster. We begin by articulating what is meant by hazards and disasters and how that links to family resilience. In doing so, we stress the importance of adaptive capacity and trajectories over time. We then provide an illustration of ongoing research related to the Resilient Children, Youth, and Communities (RCYC) project, a joint venture between researchers at Louisiana State University (LSU) and Columbia University’s National Center for Disaster Preparedness (NCDP), concerning family resilience in the context of the BP Deepwater Horizon oil spill. We close by outlining considerations for research, policy, and practice.
How to Sum and Exponentiate Hamiltonians in ZXW Calculus
Creators: name: Shaikh, Razin A.
name: Wang, Quanlong
name: Yeung, Richie
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: This paper develops practical summation techniques in ZXW calculus to reason about quantum dynamics, such as unitary time evolution. First we give a direct representation of a wide class of sums of linear operators, including arbitrary qubits Hamiltonians, in ZXW calculus. As an application, we demonstrate the linearity of the Schroedinger equation and give a diagrammatic representation of the Hamiltonian in Greene-Diniz et al, which is the first paper that models carbon capture using quantum computing. We then use the Cayley-Hamilton theorem to show in principle how to exponentiate arbitrary qubits Hamiltonians in ZXW calculus. Finally, we develop practical techniques and show how to do Taylor expansion and Trotterization diagrammatically for Hamiltonian simulation. This sets up the framework for using ZXW calculus to the problems in quantum chemistry and condensed matter physics.
description: In Proceedings QPL 2022, arXiv:2311.08375
title: Intelligent scatter radio, RF harvesting analysis, and resource allocation for ultra-low-power Internet-of-Things
Creators: name: Αλεβιζος Παναγιωτης
Publisher: name: Technical University of Crete
Year: 2017

description: Ubiquitous sensing anywhere and anytime is envisioned under the general umbrella of
Internet-of-Things (IoT). The objective of this dissertation is to contribute ultra-low-power
IoT technology, exploiting novel concepts in wireless communications and networking.

The first part of this work studies far field radio frequency (RF) energy harvesting,
taking into account non-linearity, sensitivity, and saturation effects of existing rectenna circuits.
The proposed methodology offers the statistics of the harvested power for any given rectenna model,
under mild assumptions. It is also demonstrated that currently-used linear RF harvesting models in the literature deviate from reality.
In the second part, scatter radio technology, i.e., communication via means of reflection, is studied in order to enable ultra-low-power
radio communication with single-transistor front-ends. The thesis proposes low-complexity detection schemes
as well as decoding techniques for short block-length channel codes,
tailored to coherent, as well as noncoherent reception of scatter radio. The goal was to target resource-constrained, i.e., hardware-``thin'',
scatter radio tags and simple, low-latency receivers. The developed detection and decoding algorithms are based on
composite hypothesis testing framework. Interestingly, it is demonstrated that the bit error rate (BER)
performance gap between coherent and noncoherent reception depends on the kind of
channel codes employed, the fading conditions, as well as the utilized coding interleaving depth.
The third part of this work proposes a multistatic scatter radio network architecture, based on orthogonal signaling,  contrasted to existing
architectures for dyadic Nakagami fading. Orthogonal signaling allows for collision free multi-user access for low-bitrate tags.
It is shown that the proposed scatter radio architecture offers better diversity order, more reliable reception, as well as better
field coverage, while demonstrating smaller sensitivity to the topology of the scatter radio tags, compared to existing monostatic architecture.
Finally, the last part of the dissertation studies resource allocation in multi-cell backscatter sensor networks (BSNs). The average long-term
signal-to interference-plus-noise ratio (SINR) of linear detectors is explored for multi-cell BSNs, and subsequently harnessed to
allocate frequency sub-channels at tags. The proposed resource allocation algorithm is based on the Max-Sum inference algorithm and its convergence-complexity trade-off
is quantified.
Experimental studies in an outdoor scatter radio testbed corroborate the theoretical findings of this work.
Hopefully, this thesis will establish the viability of scatter radio for ultra-low-power communications, enabling critical current and future IoT
applications.
Deepwater Horizon oil spill exposure and child health: a longitudinal analysis
Creators: name: Slack, Tim
name: Kroeger, Rhiannon A.
name: Stroope, Samuel
name: Sweet Keating, Kathryn
name: Sury, Jonathan
name: Brooks, Jeremy
name: Chandler, Thomas E.
name: Beedasy, Jaishree
Publisher: name: Columbia University
Year: 2020
Subjects: Children--Health and hygiene
Disasters
Families
Resilience (Personality trait)
BP Deepwater Horizon Explosion and Oil Spill (2010)

description: The BP Deepwater Horizon oil spill (DHOS) created widespread concern about threats to health among residents of the Louisiana Gulf Coast. This study uses data from the Resilient Children, Youth, and Communities study—a longitudinal cohort survey of households with children in DHOS-affected areas of South Louisiana—to consider the effect of DHOS exposure on health trajectories of children, an especially vulnerable population subgroup. Results from latent linear growth curve models show that family DHOS exposure via physical contact and job/income loss both negatively influenced initial child health. However, the effects of physical exposure dissipated over time while the effects of job/income loss persisted. This pattern holds for both general child health and the number of recent physical health problems children had experienced. These findings help to bridge the literature on disaster impacts and resilience/vulnerability, with the literature on socioeconomic status as a fundamental cause of health outcomes over the life course.
title: Large scale optimization methods and applications in tensor optimization
title: Τεχνικές βελτιστοποίησης μεγάλης κλίμακας με εφαρμογές σε tensors
Creators: name: Λουρακης Γεωργιος
Publisher: name: Technical University of Crete
Year: 2017

description: We consider the problems of nonnegative tensor factorization and completion. Our aim is to derive efficient algorithms that are also suitable for parallel implementation. We adopt the alternating optimization framework and solve each matrix nonnegative least-squares problem via a Nesterov-type algorithm for convex and strongly convex problems. We describe parallel implementations of the algorithms and measure the attained speedup in a multi-core computing environment. It turns out that the derived algorithms are competitive candidates for the solution of very large-scale nonnegative tensor factorization and completion.
A Simplified Approach to General Scalar-Tensor Theories
Creators: name: Bloomfield, Jolyon
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The most general covariant action describing gravity coupled to a scalar field with only second order equations of motion, Horndeski's theory (also known as "Generalized Galileons"), provides an all-encompassing model in which single scalar dark energy models may be constrained. However, the generality of the model makes it cumbersome to manipulate. In this paper, we demonstrate that when considering linear perturbations about a Friedmann-Robertson-Walker background, the theory is completely specified by only six functions of time, two of which are constrained by the background evolution. We utilise the ideas of the Effective Field Theory of Inflation/Dark Energy to explicitly construct these six functions of time in terms of the free functions appearing in Horndeski's theory. These results are used to investigate the behavior of the theory in the quasistatic approximation. We find that only four functions of time are required to completely specify the linear behavior of the theory in this limit, which can further be reduced if the background evolution is fixed. This presents a significantly reduced parameter space from the original presentation of Horndeski's theory, giving hope to the possibility of constraining the parameter space. This work provides a cross-check for previous work on linear perturbations in this theory, and also generalizes it to include spatial curvature.
description: 14 pages, 2 tables. V2: Added footnote. V3: Matches publication version; typos in publication version fixed in Eqs. (15) and (22)
PT-symmetric quantum Rabi model
Creators: name: Lu, Xilin
name: Li, Hui
name: Shi, Jia-Kai
name: Fan, Li-Bao
name: Mangazeev, Vladimir
name: Li, Zi-Min
name: Batchelor, Murray T.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this work, we explore the PT-symmetric quantum Rabi model, which describes a PT-symmetric qubit coupled to a quantized light field. By employing the adiabatic approximation (AA), we are able to solve this model analytically in the parameter regime of interest and analyze various physical aspects. We investigate the static and dynamic properties of the model, using both the AA and numerical diagonalization. Our analysis reveals a multitude of exceptional points (EPs) that are closely connected with the exactly solvable points in the Hermitian counterpart of the model. Intriguingly, these EPs vanish and revive depending on the light-matter coupling strength. Furthermore, we discuss the time evolution of physical observables under the non-Hermitian Hamiltonian. Rich and exotic behaviors are observed in both strong and ultra-strong coupling regimes. Our work extends the theory of PT symmetry into the full quantum light-matter interaction regime and provides insights that can be readily enlarged to a broad class of quantum optical systems.
A Review of Sierra Leone's Mines and Minerals Act
Creators: name: Mebratu-Tsegaye, Tehtena
name: Toledano, Perrine
Publisher: name: Columbia University
Year: 2020
Subjects: Mining law
Mines and mineral resources
Fiscal policy
Climatic changes
Human rights
Community development
Community organization--Citizen participation

description: With the support of Oxfam, the Columbia Center on Sustainable Investment reviewed select provisions in the Mines and Minerals Act 2009 and corresponding policy statements from the Minerals Policy 2018 to provide recommendations for how to best align the anticipated new mining law with international best practice. The 2009 law was reviewed with a focus on the following topics: • Fiscal regime; • Climate change; • Access to and use of land; • Community consultations and participation; • Human rights; and • Community development agreements. The policy brief aims to support the Government of Sierra Leone in the ongoing law reform process.
title: Παρεισφρήσεις σε χωρικά και διανοητικά όρια
title: Infiltrations through spatial and conceptual boundaries
Creators: name: Κοσμιδη Μαρια
Publisher: name: Technical University of Crete
Year: 2019

description: Η έννοια του ορίου έχει συνυφανθεί με τις έννοιες του διαχωρισμού, της προστασίας, του ελέγχου. Έχει συνυφανθεί με την έννοια της τοποθέτησης σταθερών σχέσεων απέναντι στην κινητικότητα, τη μετατροπή της πραγματικότητας που επιφέρει η κίνηση του χρόνου. Γίνεται συνήθως αντιληπτό ως το χωρικό ή διανοητικό πεδίο στο οποίο συμβαίνει η διαπραγμάτευση μεταξύ εξωτερικών και εσωτερικών στοιχείων μιας τάξης, ελέγχονται οι ασφαλείς και μη παράγοντες που θα αφομοιωθούν, οι κινήσεις και οι ταυτότητες οι οποίες είναι έπειτα ικανές να έχουν πρόσβαση στην τάξη που αυτό ορίζει.Κατά μια έννοια ορίζει ένα πεδίο ομοιογένειας, όπου η ετερότητα αποτελεί έναν ξένο όρο και η μόνη περίπτωση ενσωμάτωσής της σε ένα πεδίο είναι η ομοιογενοποίησή της προκειμένου να ενισχυθεί η ισχύουσα τάξη. Ταυτόχρονα στις αρχιτεκτονικές θεωρήσεις το όριο λαμβάνει συνήθως τον ρόλο του απόλυτου και σταθερού διαχωριστικού στοιχείου των υλικών ή διανοητικών εδαφών, ως τη θέση που επιδιώκει να ελέγχει διατάξεις κλειστών συστημάτων. Αυτή η αντίληψη της αρχιτεκτονικής σκέψης για το όριο ενεργοποιεί μια ταξινόμηση όρων σύμφωνα με την ομοιογένειά τους, διαχωρίζοντας κάθε είδους στοιχείο σύμφωνα με σταθερές ταυτότητες και ρόλους, δημιουργώντας σταθερές σχέσεις και παγιωμένες νοηματοδοτήσεις που προκαλούν την διακοπή μιας δημιουργικής σύνθεσης.
Η παρούσα μελέτη εξετάζει τους τρόπους με τους οποίους η σύγχρονη θεωρητική και αρχιτεκτονική σκέψη μπορεί να χειριστεί δυναμικά και δημιουργικά την έννοια της οριοθέτησης, ώστε να παράγει συνθέσεις που χαρακτηρίζονται από ετερογένεια και δυναμικά όρια. Στόχο της εργασίας αποτελεί η απεμπλοκή της συνθετικής σκέψης από αντιλήψεις που την περιορίζουν σε μια στερεοτυπική απόδοση της έννοιας του ορίου. Αφετηρία της έρευνας αποτελεί η θέση πως η δυναμική μιας σύνθεσης βρίσκεται στη σχέση που διατηρεί με τα εργαλεία με τα οποία χειρίζεται τa όριά της. Δηλαδή πως η δυναμική μιας σύνθεσης βρίσκεται στην ικανότητά της να παράγει νέα νοήματα, ενώ φανερώνει την πολυπλοκότητα της πραγματικότητας από την οποία αναδύονται.
Επιδιώκεται η μετατόπιση της κυρίαρχης αντίληψης πάνω στην έννοια του ορίου, από μια συμπαγή και σταθερή τοποθέτηση σε μια δυναμική συνάντηση, συναρμογή και αλληλεπίδραση διαφορετικών ποιοτήτων και ρυθμών. Οπότε, μελετώνται σύγχρονες θεωρητικές και αρχιτεκτονικές θεωρίες και πρακτικές, που αναδεικνύουν το όριο σε μια δυναμική απόσταση επαφής ετεροτήτων.
Quantum Chromodynamics with massive gluons
Creators: name: Larin, S. A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: It is shown that the Lagrangian of Quantum Chromodynamics can be modified by the adding gluon masses. On mass-shell renormalizability of the resulting theory is discussed.
description: 6 pages
Complete hypersurfaces with $w$-constant mean curvature in the unit spheres
Creators: name: Cheng, Qing-Ming
name: Wei, Guoxin
Publisher: name: arXiv
Year: 2022
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: In this paper, we study $4$-dimensional complete hypersurfaces with $w$-constant mean curvature in the unit sphere. We give a lower bound of the scalar curvature for $4$-dimensional complete hypersurfaces with $w$-constant mean curvature. As a by-product, we give a new proof of the result of Deng-Gu-Wei under the weaker topological condition.
Effect of black seed oil, honey, whey protein concentrate and their interaction on antioxidant activity, elastic modulus and creaming index of O/W emulsions
Creators: name: Hayati, Ibrahim Nor
name: Hui, Chong Han
name: Ishak, Wan Rosli Wan
name: Yusof, Hayati Mohd
name: Hanidun, Suhana Muhamad
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biochemistry
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Pharmacology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified
subject: Plant Biology
subject: 60506 Virology

description: An emulsion based on a combination of highly-valued black seed oil (BSO) and honey shall be introduced as an emerging nutraceutical since the emulsion could be an efficient carrier for bioactive compounds from both. This study aimed to determine effect of BSO, honey, whey protein concentrate (WPC) and their interaction on antioxidant activity (i.e. IC50, the concentration of sample required to scavenge 50% of 2,2-diphenyl-1-picrylhydrazyl free radicals), elastic modulus (G′) and creaming index (CI) of O/W emulsions by means of a response surface methodology. Twenty emulsions were ultrasonically prepared by using various combinations of BSO (10–20%), honey (10–20% and WPC (2–6%) based on a central composite design. Regression analysis (R 2 = 0.92–1.00) revealed that a decrease in the IC50 was mainly due to significant (p G′ yet decreased the CI. Synergistic effects of BSO-honey on IC50 and G′ were also significant (p p 50. By using the fitted quadratic models, the optimized levels of BSO (20.0%), honey (18.2%) and WPC (6.0%) were proposed and predicted to provide the desired emulsion with IC50 = 0.12 mg/ml, G′ = 606.65 Pa and CI = 1.45%. These values were successfully validated with their respective experimental values.