cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Prior normalization for certified likelihood-informed subspace detection of Bayesian inverse problems
Creators: name: Cui, Tiangang
name: Tong, Xin
name: Zahm, Olivier
Publisher: name: arXiv
Year: 2022
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: Markov chain Monte Carlo (MCMC) methods form one of the algorithmic foundations of Bayesian inverse problems. The recent development of likelihood-informed subspace (LIS) methods offers a viable route to designing efficient MCMC methods for exploring high-dimensional posterior distributions via exploiting the intrinsic low-dimensional structure of the underlying inverse problem. However, existing LIS methods and the associated performance analysis often assume that the prior distribution is Gaussian. This assumption is limited for inverse problems aiming to promote sparsity in the parameter estimation, as heavy-tailed priors, e.g., Laplace distribution or the elastic net commonly used in Bayesian LASSO, are often needed in this case. To overcome this limitation, we consider a prior normalization technique that transforms any non-Gaussian (e.g. heavy-tailed) priors into standard Gaussian distributions, which makes it possible to implement LIS methods to accelerate MCMC sampling via such transformations. We also rigorously investigate the integration of such transformations with several MCMC methods for high-dimensional problems. Finally, we demonstrate various aspects of our theoretical claims on two nonlinear inverse problems.
Some novel correlation coefficients of spherical fuzzy setswith their application in pattern recognition
Creators: name: Ganie, Abdul Haseeb
Publisher: name: Research and Development Office, Prince of Songkla University
Year: 2022
Subjects: correlation coefficient
picture fuzzy set
spherical fuzzy set
linguistic hedge
pattern recognition

description: Songklanakarin Journal of Science an Technology (SJST), 44, 3, 636-645
ExPoSe: Combining State-Based Exploration with Gradient-Based Online Search
Creators: name: Mittal, Dixant
name: Aravindan, Siddharth
name: Lee, Wee Sun
Publisher: name: arXiv
Year: 2022
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Online tree-based search algorithms iteratively simulate trajectories and update action-values for a set of states stored in a tree structure. It works reasonably well in practice but fails to effectively utilise the information gathered from similar states. Depending upon the smoothness of the action-value function, one approach to overcoming this issue is through online learning, where information is interpolated among similar states; Policy Gradient Search provides a practical algorithm to achieve this. However, Policy Gradient Search lacks an explicit exploration mechanism, which is a key feature of tree-based online search algorithms. In this paper, we propose an efficient and effective online search algorithm called Exploratory Policy Gradient Search (ExPoSe), which leverages information sharing among states by updating the search policy parameters directly, while incorporating a well-defined exploration mechanism during the online search process. We evaluate ExPoSe on a range of decision-making problems, including Atari games, Sokoban, and Hamiltonian cycle search in sparse graphs. The results demonstrate that ExPoSe consistently outperforms other popular online search algorithms across all domains. The ExPoSe source code is available at \textit{\url{https://github.com/dixantmittal/ExPoSe}}.
Anxiolytic-like activity of serotonin-3 receptor antagonist:In-silico molecular modeling, drug-likenessand evaluation of anxiolytic activity
Creators: name: Venkatesha Perumal Ramachandran
name: Revathi Rajappan
Publisher: name: Research and Development Office, Prince of Songkla University
Year: 2022
Subjects: 5-HT3 receptor antagonist
anxiolytics
molecular docking
ADMET

description: Songklanakarin Journal of Science an Technology (SJST), 44, 3, 646-652
Numerical analysis of unsteady non-Newtonian MHD nanofluid flowover a stretching sheet
Creators: name: Kharabela Swain
name: Madhusudan Senapati
name: Sampada Kumar Parida
Publisher: name: Research and Development Office, Prince of Songkla University
Year: 2022
Subjects: casson nonoliquid
stagnation point flow
Brownian movement
thermophoresis
thermal radiation
porous medium

description: Songklanakarin Journal of Science an Technology (SJST), 44, 3, 653-661
An Unorthodox X-Class Long-Duration Confined Flare
Creators: name: Liu, Rui
name: Titov, Viacheslav S.
name: Gou, Tingyu
name: Wang, Yuming
name: Liu, Kai
name: Wang, Haimin
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We report the observation of an X-class long-duration flare which is clearly confined. It appears as a compact-loop flare in the traditional EUV passbands (171 and 195 Å), but in the passbands sensitive to flare plasmas (94 and 131 Å), it exhibits a cusp-shaped structure above an arcade of loops like other long-duration events. Inspecting images in a running difference approach, we find that the seemingly diffuse, quasi-static cusp-shaped structure consists of multiple nested loops that repeatedly rise upward and disappear approaching the cusp edge. Over the gradual phase, we detect numerous episodes of loop rising, each lasting minutes. A differential emission measure analysis reveals that the temperature is highest at the top of the arcade and becomes cooler at higher altitudes within the cusp-shaped structure, contrary to typical long-duration flares. With a nonlinear force-free model, our analysis shows that the event mainly involves two adjacent sheared arcades separated by a T-type hyperbolic flux tube (HFT). One of the arcades harbors a magnetic flux rope, which is identified with a filament that survives the flare owing to the strong confining field. We conclude that a new emergence of magnetic flux in the other arcade triggers the flare, while the preexisting HFT and flux rope dictate the structure and dynamics of the flare loops and ribbons during the long-lasting decay phase, and that a quasi-separatrix layer high above the HFT could account for the cusp-shaped structure.
description: Accepted for publication in ApJ
The Desāi of Kuḍāl And The Sāvant of Vādi
Creators: name: RODRIGUES, TENSING CARLOS
Publisher: name: figshare
Year: 2020
Subjects: subject: History
subject: Anthropology
subject: FOS: Sociology
subject: Archaeology
subject: Geography
subject: Sociology

description: Probably the reason why it happened in the case of Kuḍāl was because the positions occupied by both the Prabhu and the Sāvant were not positions in a classic watandārī which has the agrarian economy as its base. The primary function of such a watandār is development of village communities and collecting revenue from such land. Their reward too was the ‘hakka’ (right) to collect and keep a part of the revenue. The Prabhu and the Sāvant were largely ‘acquired’ and ‘adopted’ by the Bijapuri and Maratha rulers on account of their military prowess. So the ‘conquest’ was the very essence of their watandārī relation.
Work hardening behavior and model validationsfor aluminum alloy AA7075
Creators: name: Nakarin Vutipow
name: Terdsak Arlai
name: Patiphan Juijerm
Publisher: name: Research and Development Office, Prince of Songkla University
Year: 2022
Subjects: work hardening
aluminum alloy
flow curve
tension
compression

description: Songklanakarin Journal of Science an Technology (SJST), 44, 3, 662-667
Inventions on GUI for Eye Cursor Controls Systems
Creators: name: Mishra, Umakant
Publisher: name: arXiv
Year: 2014
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: Operating a GUI through eyeball is a complex mechanism and not used as often as mouse or trackball. But there are situations where eye-mouse devices can play a tremendous role especially where the hands of the user are not available or busy to perform other activities. The difficulties of implementing an eye-cursor control system are many. The article illustrates some inventions on eye-cursor control system, which attempt to eliminate the difficulties of the prior art mechanisms.
description: 6 pages, 4 figures
Testing Lorentz Invariance of Gravity in the Standard Model Extension with GWTC-3
Creators: name: Niu, Rui
name: Zhu, Tao
name: Zhao, Wen
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Successful detection of gravitational waves has presented a new avenue to explore the nature of gravity. With the cumulative catalog of detected events, we can perform tests on General Relativity from various aspects with increasing precision. In this work, we focus on Lorentz symmetry during propagation of gravitational waves. Considering the dispersion relation in the gauge-invariant linearized gravity sector of the Standard-Model Extension, the anisotropy, birefringence, and dispersion effects will be induced during propagation of gravitational waves because of the Lorentz violating modification, and cause dephasings in waveform received by detectors. With the distorted waveform, we perform full Bayesian inference with confident events in the last gravitational wave catalog. We consider two cases associated with the lowest mass dimension $d=5,6$ which are supposed to have the most significant effects, and place the constraints on the expansion coefficients characterizing the Lorentz violating behavior which have 16 independent components for $d=5$ and 18 components for $d=6$. We do not find any evidence for Lorentz violation in the gravitational wave data, the constraints on the coefficients are on the order of $10^{-15}{\rm m}$ for $d=5$ and $10^{-10}{\rm m^2}$ for $d=6$ respectively.
description: 29 pages, 6 figures
Parasitic-free gate: A protected switch between idle and entangled states
Creators: name: Xu, Xuexin
name: Ansari, M. H.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose a gate to switch superconducting qubit pairs in and out of a two-body interaction. This gate uses cross resonance driving on a tunable circuit with adjusted parameters and without accumulating residual ZZ interaction for idle and interacting qubits. It is imperative that this gate does not spread errors through the quantum register. Our detailed theoretical results show that these error-free modes do not necessarily require largely tunable circuits, such as magnetic modulation of qubits or couplers. We obtain the operational gate on weakly tuneable circuits as well and show that switching between them is remarkably fast.
description: 15 pages, 15 figures
Gibbs-Jaynes Entropy Versus Relative Entropy
Creators: name: Meléndez, M.
name: Español, P.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The maximum entropy formalism developed by Jaynes determines the relevant ensemble in nonequilibrium statistical mechanics by maximising the entropy functional subject to the constraints imposed by the available information. We present an alternative derivation of the relevant ensemble based on the Kullback-Leibler divergence from equilibrium. If the equilibrium ensemble is already known, then calculation of the relevant ensemble is considerably simplified. The constraints must be chosen with care in order to avoid contradictions between the two alternative derivations. The relative entropy functional measures how much a distribution departs from equilibrium. Therefore, it provides a distinct approach to the calculation of statistical ensembles that might be applicable to situations in which the formalism presented by Jaynes performs poorly (such as non-ergodic dynamical systems).
description: The final publication is available at Springer via http://dx.doi.org/10.1007/s10955-014-0954-6
Catalyzation of supersolidity in binary dipolar condensates
Creators: name: Scheiermann, D.
name: Ardila, L. A. Peña
name: Bland, T.
name: Bisset, R. N.
name: Santos, L.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: Breakthrough experiments have newly explored the fascinating physics of dipolar quantum droplets and supersolids. The recent realization of dipolar mixtures opens further intriguing possibilities. We show that under rather general conditions, the presence of a second component catalyzes droplet nucleation and supersolidity in an otherwise unmodulated condensate. Droplet catalyzation in miscible mixtures, which may occur even for a surprisingly small impurity doping, results from a local roton instability triggered by the doping-dependent modification of the effective dipolar strength. The catalyzation mechanism may trigger the formation of a two-fluid supersolid, characterized by a generally different superfluid fraction of each component, which opens intriguing possibilities for the future study of spin physics in dipolar supersolids.
description: 10 pages
Algorithm for evaluating distance-based entanglement measures
Creators: name: Hu, Yixuan
name: Liu, Ye-Chao
name: Shang, Jiangwei
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantifying entanglement in quantum systems is an important yet challenging task due to its NP-hard nature. In this work, we propose an efficient algorithm for evaluating distance-based entanglement measures. Our approach builds on Gilbert's algorithm for convex optimization, providing a reliable upper bound on the entanglement of a given arbitrary state. We demonstrate the effectiveness of our algorithm by applying it to various examples, such as calculating the squared Bures metric of entanglement as well as the relative entropy of entanglement for GHZ states, $W$ states, Horodecki states, and chessboard states. These results demonstrate that our algorithm is a versatile and accurate tool that can quickly provide reliable upper bounds for entanglement measures.
description: 7 pages, 4 figures; close to the published version
Holographic Bubbles with Jecco: Expanding, Collapsing and Critical
Creators: name: Bea, Yago
name: Casalderrey-Solana, Jorge
name: Giannakopoulos, Thanasis
name: Jansen, Aron
name: Mateos, David
name: Sanchez-Garitaonandia, Mikel
name: Zilhão, Miguel
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Cosmological phase transitions can proceed via the nucleation of bubbles that subsequently expand and collide. The resulting gravitational wave spectrum depends crucially on the properties of these bubbles. We extend our previous holographic work on planar bubbles to circular bubbles in a strongly-coupled, non-Abelian, four-dimensional gauge theory. This extension brings about two new physical properties. First, the existence of a critical bubble, which we determine. Second, the bubble profile at late times exhibits a richer self-similar structure, which we verify. These results require a new 3+1 evolution code called Jecco that solves the Einstein equations in the characteristic formulation in asymptotically AdS spaces. Jecco is written in the Julia programming language and is freely available. We present an outline of the code and the tests performed to assess its robustness and performance.
description: 63 pages, 23 figures. minor typo fixed
Luminosity Monitoring in ATLAS with MPX Detectors
Creators: name: Sopczak, Andre
Publisher: name: arXiv
Year: 2013
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The ATLAS-MPX detectors are based on the Medipix2 silicon devices designed by CERN for the detection of multiple types of radiation. Sixteen such detectors were successfully operated in the ATLAS detector at the LHC and collected data independently of the ATLAS data-recording chain from 2008 to 2013. Each ATLAS-MPX detector provides separate measurements of the bunch-integrated LHC luminosity. An internal consistency for luminosity monitoring of about 2% was demonstrated. In addition, the MPX devices close to the beam are sensitive enough to provide relative-luminosity measurements during van der Meer calibration scans, in a low-luminosity regime that lies below the sensitivity of the ATLAS calorimeter-based bunch-integrating luminometers. Preliminary results from these luminosity studies are presented for 2012 data taken at sqrt(s)=8 TeV proton-proton collisions.
description: On behalf of the ATLAS and Medipix-2 Collaborations. Contribution to IPRD13, 7-10 October 2013, Siena, Italy. To be published in the proceedings by JINST. 10 pages, 8 figures
Agrypnus bipapulatus Nakane and Kishii 1955
Creators: name: Kotru, Akash
name: Chandran, Nithya
name: Dubey, Anil Kumar
name: Prosvirov, Alexander S.
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Elateridae
Agrypnus
Agrypnus bipapulatus

description: Agrypnus bipapulatus (Candèze, 1865)
Lacon bipapulatus Candèze, 1865: 11.
Agrypnus bipapulatus (Candèze) Nakane and Kishii, 1955: 4.
Agrypnus sakishimanus Ôhira; Ôhira, 1967: 100.
Agrypnus (Agrypnus) bipapulatus sakishimanus Ôhira; Ôhira, 1969: 90.
Type depository. Lectotype (BMNH).
Type locality. China.
Distribution. India: West Bengal, Sikkim (Chakraborty, Chakrabarti, 2006). Elsewhere: China, Japan, Taiwan (Cate, 2007).
Literature. Candèze (1889: 73): original description; Nakane and Kishii (1955: 4): combination; Ôhira (1967: 100): revision; Ôhira (1969: 90): revision; Chakraborty and Chakrabarti (2006: 33): records of the zoological survey of India, records of the zoological survey of India, occasional paper no. 254.
description: Published as part of Kotru, Akash, Chandran, Nithya, Dubey, Anil Kumar & Prosvirov, Alexander S., 2025, A catalogue of Indian Agrypninae Candèze, 1857 (Coleoptera: Elateridae), pp. 1-66 in Zootaxa 5614 (1) on page 13, DOI: 10.11646/zootaxa.5614.1.1, http://zenodo.org/record/15217075
Small-scale intermittency of premixed turbulent flames
Creators: name: Roy, Amitesh
name: Picardo, Jason Ryan
name: Emerson, Benjamin
name: Lieuwen, Tim C.
name: Sujith, Raman I.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Premixed turbulent flames, encountered in power generation and propulsion engines, are an archetype of a randomly advected, self-propagating surface. While such a flame is known to exhibit large-scale intermittent flapping, the possible intermittency of its small-scale fluctuations has been largely disregarded. Here, we experimentally reveal the inner intermittency of a premixed turbulent V-flame, while clearly distinguishing this small-scale feature from large-scale outer intermittency. From temporal measurements of the fluctuations of the flame, we find a frequency spectrum that has a power-law subrange with an exponent close to $-2$, which is shown to follow from Kolmogorov phenomenology. Crucially, however, the moments of the temporal increment of the flame position are found to scale anomalously, with exponents that saturate at higher-orders. This signature of small-scale inner intermittency is shown to originate from high-curvature, cusp-like structures on the flame surface, which have significance for modeling the heat release rate and other key properties of premixed turbulent flames.
Automation of reversible steganographic coding with nonlinear discrete optimisation
Creators: name: Chang, Ching-Chun
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Multimedia (cs.MM)
subject: FOS: Computer and information sciences

description: Authentication mechanisms are at the forefront of defending the world from various types of cybercrime. Steganography can serve as an authentication solution through the use of a digital signature embedded in a carrier object to ensure the integrity of the object and simultaneously lighten the burden of metadata management. Nevertheless, despite being generally imperceptible to human sensory systems, any degree of steganographic distortion might be inadmissible in fidelity-sensitive situations such as forensic science, legal proceedings, medical diagnosis and military reconnaissance. This has led to the development of reversible steganography. A fundamental element of reversible steganography is predictive analytics, for which powerful neural network models have been effectively deployed. Another core element is reversible steganographic coding. Contemporary coding is based primarily on heuristics, which offers a shortcut towards sufficient, but not necessarily optimal, capacity--distortion performance. While attempts have been made to realise automatic coding with neural networks, perfect reversibility is unattainable via such learning machinery. Instead of relying on heuristics and machine learning, we aim to derive optimal coding by means of mathematical optimisation. In this study, we formulate reversible steganographic coding as a nonlinear discrete optimisation problem with a logarithmic capacity constraint and a quadratic distortion objective. Linearisation techniques are developed to enable iterative mixed-integer linear programming. Experimental results validate the near-optimality of the proposed optimisation algorithm when benchmarked against a brute-force method.
Pulsed source of spectrally uncorrelated and indistinguishable photons at telecom wavelengths
Creators: name: Bruno, Natalia
name: Martin, Anthony
name: Guerreiro, Thiago
name: Sanguinetti, Bruno
name: Thew, Robert T.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We report on the generation of indistinguishable photon pairs at telecom wavelengths based on a type-II parametric down conversion process in a periodically poled potassium titanyl phosphate (PPKTP) crystal. The phase matching, pump laser characteristics and coupling geometry are optimised to obtain spectrally uncorrelated photons with high coupling efficiencies. Four photons are generated by a counter- propagating pump in the same crystal and anlysed via two photon interference experiments between photons from each pair source as well as joint spectral and g^(2) measurements. We obtain a spectral purity of 0.91 and coupling efficiencies around 90% for all four photons without any filtering. These pure indistinguishable photon sources at telecom wavelengths are perfectly adapted for quantum network demonstrations and other multi-photon protocols.
Interaction Effects on the Magneto-optical Response of Magnetoplasmonic Dimers
Creators: name: de Sousa, N.
name: Froufe-Pérez, L. S.
name: Armelles, G.
name: Cebollada, A.
name: González, M. U.
name: García, F.
name: Meneses-Rodríguez, D.
name: García-Martín, A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The effect that dipole-dipole interactions have on the magneto-optical (MO) properties of magnetoplasmonic dimers is theoretically studied. The specific plasmonic versus magnetoplasmonic nature of the dimer's metallic components and their specific location within the dimer plays a crucial role on the determination of these properties. We find that it is possible to generate an induced MO activity in a purely plasmonic component, even larger than that of the MO one, therefore dominating the overall MO spectral dependence of the system. Adequate stacking of these components may allow obtaining, for specific spectral regions, larger MO activities in systems with reduced amount of MO metal and therefore with lower optical losses. Theoretical results are contrasted and confirmed with experiments for selected structures.
Decoherence of a Driven Qubit
Creators: name: Jing, Jun
name: Huang, Peihao
name: Hu, Xuedong
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study decoherence of a field-driven qubit in the presence of environmental noises. For a general qubit, we find that driving, whether on-resonance or off-resonance, alters the qubit decoherence rates (including dissipation and pure dephasing), allowing both blue and red sideband contributions from the reservoir. Depending on the noise spectral density, driving field detuning and driving field phase shift, the qubit decoherence rates could be either accelerated or reduced. We apply our general theory to the system of an electron spin qubit that is confined in a quantum dot and driven by an in-plane electric field. We analyze how spin relaxation induced by the electrical noise due to electron-phonon interaction varies as a function of driving frequency, driving magnitude, driving field phase shift and spin-orbit coupling strengths.
description: 12 pages, 7 figures
The laws of nature and the problems of modern cosmology
Creators: name: Gaspar, Yves
name: Tambor, Pawel
Publisher: name: arXiv
Year: 2023
Subjects: subject: History and Philosophy of Physics (physics.hist-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences
subject: 83F05

description: The notion that nature is subject to laws is exciting from many different viewpoints. This paper is based on the context of modern cosmology and presents a more philosophical discussion. It will list the significant interdisciplinary implications generated by various aspects of the contemporary scientific discussion about the status of laws of nature, especially their dynamic nature. Recent work highlights how multiple aspects of the observed universe still lack explanation and that several problems of standard cosmology still form the object of debate. Considering these issues, several proposals have been made that entail a revision of the concept of the law of nature, according to which the nature of time and of the relation between causality and natural laws ought to be reconsidered using approaches or viewpoints which point to philosophical issues. We argue that Tim Maudlin's concept of Fundamental Law of Temporal Evolution (FLOTE) and Nancy Cartwright's notion of the nomological machine provide new insights and valuable tools that can be used in the analysis of the status of laws in the context of cosmology and of complex systems theory. The limits of the traditional approach to laws of nature and of their mathematical formulation are highlighted in this context, as well as the fact that many of the ultimate properties of nature may turn out to be formally unpredictable or uncomputable.
description: 40 pages, no figures. Found Sci (2023)
Landau-Ginzburg mirror, quantum differential equations and qKZ difference equations for a partial flag variety
Creators: name: Tarasov, Vitaly
name: Varchenko, Alexander
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mathematical Physics (math-ph)
subject: Algebraic Geometry (math.AG)
subject: Quantum Algebra (math.QA)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 14N35, 53D45, 14D05, 33C70

description: We consider the system of quantum differential equations for a partial flag variety and construct a basis of solutions in the form of multidimensional hypergeometric functions, that is, we construct a Landau-Ginzburg mirror for that partial flag variety. In our construction, the solutions are labeled by elements of the $K$-theory algebra of the partial flag variety. To establish these facts we consider the equivariant quantum differential equations for a partial flag variety and introduce a compatible system of difference equations, which we call the qKZ equations. We construct a basis of solutions of the joint system of the equivariant quantum differential equations and qKZ difference equations in the form of multidimensional hypergeometric functions. Then the facts about the non-equivariant quantum differential equations are obtained from the facts about the equivariant quantum differential equations by a suitable limit. Analyzing these constructions we obtain a formula for the fundamental Levelt solution of the quantum differential equations for a partial flag variety.
description: Latex, 78 pages; v.2: added Appendix E on polynomiality of solutions, v.3: a misprint in the formula for R^\circ(u) in Section 3.1 is corrected
Enhanced photon-extraction efficiency from deterministic quantum-dot microlenses
Creators: name: Gschrey, M.
name: Seifried, M.
name: Krüuger, L.
name: Schmidt, R.
name: Schulze, J. -H.
name: Heindel, T.
name: Burger, S.
name: Rodt, S.
name: Schmidt, F.
name: Strittmatter, A.
name: Reitzenstein, S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The prospect of realizing building blocks for long-distance quantum communication is a major driving force for the development of advanced nanophotonic devices. Significant progress has been achieved in this field with respect to the fabrication of efficient quantum-dot-based single-photon sources. More recently, even spin-photon entanglement and quantum teleportation have been demonstrated in semiconductor systems. These results are considered as crucial steps towards the realization of a quantum repeater. The related work has almost exclusively been performed on self-assembled quantum dots (QDs) and random device technology. At this point it is clear that further progress in this field towards real applications will rely crucially on deterministic device technologies which will, for instance, enable the processing of bright quantum light sources with pre-defined emission energy. Here we report on enhanced photon-extraction efficiency from monolithically integrated microlenses which are coupled deterministically to single QDs. The microlenses with diameters down to 800 nm were aligned to single QDs by in-situ electron-beam lithography using a low-temperature cathodoluminescence setup. This deterministic device technology allowed us to obtain an enhancement of photon extraction efficiency for QDs integrated into microlenses as compared to QDs in unstructured surfaces. The excellent optical quality of the structures is demonstrated by cathodoluminescence and micro-photoluminescence spectroscopy. A Hong-Ou-Mandel experiment states the emission of single indistinguishable photons.
description: 18 pages, 5 figures
Electron-phonon coupling in the superconducting single crystal Rb$_{0.8}$Fe$_{1.68}$Se$_2$
Creators: name: Xu, B.
name: Dai, Y. M.
name: Han, J.
name: Wang, K.
name: Yang, R.
name: Yang, Y. X.
name: Zhang, W.
name: Xiao, H.
name: Qiu, X. G.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The optical properties of the superconducting single crystal Rb$_{0.8}$Fe$_{1.68}$Se$_2$ with $T_{c}$ $\simeq$ 31 K have been measured over a wide frequency range in the $ab$ plane. We found that the optical conductivity is dominated by a series of infrared-active phonon modes at low-frequency region as well as several other high-frequency bound excitations. The low-frequency optical conductivity has rather low value and shows quite small Drude-like response, indicating low carriers density in this material. Furthermore, the phonon modes increase continuously in frequency with decreasing temperature; specifically, the phonon mode around 200 cm$^{-1}$ shows an enhanced asymmetry effect at low temperatures, suggesting an increasing electron-phonon coupling in this system.
description: 12 pages, 3 figures
PIDs in der offenen Wissenschaft - Chancen und Herausforderungen
Creators: name: Genderjahn, Steffi
name: Lange, Marc
Publisher: name: Zenodo
Year: 2024
Subjects: PIDs
RDM
FDM
FAIR

description: Persistente Identifikatoren (PID) sind entscheidend für den Aufbau gemeinsamer Infrastruktur für offene Wissenschaft. Sie ermöglichen die eindeutige, dauerhafte Identifizierung von Forschungsobjekten und wissenschaftlichen Ressourcen. Gleichzeitig enthalten dazugehörige, beschreibende Metadaten Informationen rund um die Ressource und sind essentiell für eine digitale, vernetzten Wissenschaftslandschaft. 

Es gibt verschiedene Ansätze an denen zahlreiche Akteure und Infrastrukturen beteiligt sind, um einheitliche Strategien für die Nutzung von PID zu etablieren. Die Projekte PID Network Deutschland [1] und PID4NFDI [2] haben zum Ziel, das Bewusstsein für PIDs in einer vielfältigen Landschaft mit spezifischen Anforderungen und verschiedenen institutionellen  Rahmenbedingungen zu schärfen, indem sie Bedarfe ermitteln, Vernetzung fördern und Schulungen anbieten.

Spezifische Umfragen und Workshops, die vom PID-Netzwerk Deutschland organisiert werden, tragen dazu bei den Einsatz von PID zu identifizieren und weiter zu fördern, die Bedürfnisse und Herausforderungen in verschiedenen Forschungs- und Infrastruktureinrichtungen zu identifizieren und die Vernetzung verschiedener offener PID-Systeme auf nationaler und internationaler Ebene zu fördern. Im Rahmen der Nationalen Forschungsdateninfrastruktur (NFDI) beschäftigt sich das Projekt PID4NFDI mit technischen und metadatenbezogenen Fragen zur Interoperabilität und Standardisierung. Zudem adressiert es die Herausforderungen, die sich aus der netzwerk- und projektbasierten Governance-Struktur der NFDI ergeben.

Das Poster thematisiert die Chancen und Herausforderungen, die sich aus der Vielfalt der Ansätze ergeben und fasst insbesondere die Ergebnisse der PID Network Workshops zusammen.

[1] https://www.pid-network.de/

[2] https://base4nfdi.de/projects/pid4nfdi
Analysis of coronavirus helicases and CACHE Challenge #2 on finding hits for SARS-CoV-2 nsp13
Creators: name: Schapira, Matthieu
Publisher: name: Zenodo
Year: 2022
Subjects: AViDD
Antiviral Drug Discovery
Antiviral Drug Discovery Open Science Forum
AViDD Open Science Forum
Open Science Forum
Open Science
Rapidly Emerging Antiviral Drug Development Initiative (READDI)

description: This is Matthieu Schapira's presentation at the monthly [virtual] Antiviral Drug Discovery (AViDD) Open Science Forum on 16 November 2022. Conservation of predicted pockets in coronaviruses You can find a recording of his talk on the AViDD Open Science Forum Youtube page Matthieu Schapira is a part of the Rapidly Emerging Antiviral Drug Development Initiative (READDI)
Low energy wireless solution for soil moisture monitoring
Creators: name: Kolodziejski, Jakub
Publisher: name: No Publisher Supplied
Year: 2018

description: With a growing world population placing ever increasing demands on agricultureand an increasing scarcity of water suitable for irrigation, there is a need for efficientirrigation techniques utilizing comprehensive knowledge of soil water content. Whilecommercial solutions are available that provide the required of information, none werefound that are low cost, low maintenance, and high durability. This thesis presents a sensorand data backhaul design that addresses these three key parameters with measurable results.The design uses a TPIP-K transmit-only wireless platform for remote reporting of themeasurement data. Since soil moisture measurements need only to be taken at regular butnot precise intervals and individual data points are not critical by themselves, no bidirectionalcommunications are necessary, leaving communication channels open tomeasurement data only and allowing more sensors to be deployed for a given portion ofwireless spectrum. Additionally, since the most energy consuming component is thewireless radio itself, the transmit-only design lends itself to long battery life because theradio is only active during the brief times data needs to be reported. A long battery lifecoupled with wireless communication means deployment is simple and unobtrusive toother agricultural procedures. The design of the moisture sensor itself is based on a variable value capacitor whose dielectric material is the water in the soil, making it simple andinexpensive to manufacture. The dielectric constants of air (εr = 1) and water (εr = 80) havea large enough difference that the concentration of water per unit volume in the soil willcorrespond to a specific capacitance value of the sensor. Making use of hardware featuresspecific to the MSP430 microprocessor on the TPIP-K, precise and repeatablemeasurements can be made while maintaining low energy usage. Individual sensorcalibration for a particular soil is achieved with measurements taken at low and new batteryvoltages, to account for battery aging, and approximately 25-30% and 100% field capacity,the point at which any additional water is drained from the soil by gravity and madeunavailable to plants. Using bilinear interpolation based on the calibration data, the sensorcan than report the volumetric water content of the soil between the calibration points tobetter than 3%, which is the range and detail of information most useful for agriculturalirrigation purposes. The resulting sensor solution meets the set design goals of developingan inexpensive, low maintenance, and robust soil moisture sensor.
Composition temperature-dependent g-modes in superfluid neutron stars
Creators: name: Kantor, E. M.
name: Gusakov, M. E.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We demonstrate a possibility of existence of a peculiar temperature-dependent composition $g$-modes in superfluid neutron stars. We calculate the Brunt-V$\ddot{\rm a}$is$\ddot{\rm a}$l$\ddot{\rm a}$ frequency for these modes, as well as their eigenfrequencies. The latter turn out to be rather large, up to $\sim 500$ Hz for a chosen model of a neutron star. This result indicates, in particular, that use of the barotropic equation of state may be not a good approximation for calculation of inertial modes even in most rapidly rotating superfluid neutron stars.
description: 6 pages, 5 figures, accepted in MNRAS Letters; section "Summary and Outlook" is expanded in comparison with the journal version
Effect of oxygen off-stoichiometry on coupled structural and magnetic phase-transitions in La0.15Sr0.85MnO3-d (d = 0.02, 0.14)
Creators: name: Shahee, Aga
name: Chaudhari, R. J.
name: Rawat, R.
name: Awasthi, A. M.
name: Lalla, N. P.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Effect of oxygen off-stoichiometry on the structural and magnetic properties of La0.15Sr0.85MnO3-d (d = 0.02,0.14) has been studied employing low-temperature x-ray diffraction, calorimetry, electrical-transport and magnetization. The nearly stoichiometric composition under goesfirst order phase-transition from cubic to tetragonal P4/mmm at 238 K accompanied by magnetic and electrical phase-transitions. On the contrary the off-stoichiometric composition does not show any transition and remains cubic Pm-3m down to 80 K. Offstoichiometry induced oxygen-vacancy seems to suppress the cooperative JT distortion and possibly stabilize a G-type antiferromagnetic phase with localized cantedspins. Thus we demonstrate that controlling oxygen stoichiometry is a way of structure/property engineering in electron-doped-like manganites.
description: 17 pages, 5 figures
El trasunto historia/ficción, ficción/historia en la novela El impostor de Pedro Ángel Palou
Creators: name: Ortiz, Alberto
Publisher: name: Redoma
Year: 2023

description: La novela El impostor, escrita por Pedro Ángel Palou constituye una muestra fehaciente de que entre las posibilidades narrativas para jugar con el referente histórico y la recreación literaria, la estrategia del control autoral del dilema entre ficción y realidad desata convenientemente la trampa de la ficción literaria a favor de la deconstrucción del hecho narrado, hasta hacerlo verosímil.
description: Redoma, Vol. 2 Núm. 8 (2023): Redoma, abril-junio 2023
Migrants, rule of law, and foreign direct investment
Creators: name: Kulakevich, Tatsiana
Publisher: name: No Publisher Supplied
Year: 2018

description: Existing studies on the influence of immigration on foreign direct investment (FDI) have all documented the importance of migrants for global investment. This research identifies how investment flows are influenced by migrants and what role governments play in this relationship, specifically if destination country has weak rule of law, com- monly recognized to discourage FDI due to the lack of credibility of the government to protect property rights. Quantitative and qualitative tests suggest that the rela- tionship between FDI and migrants is stronger as the rule of law becomes weaker. This suggests that migrants can be an important driving force of FDI to the countries with weak rule of law. Migrant investors’ perception of possessing a competitive ad- vantage over non-migrant investors explains their confidence in potential profitability of their investment in their home countries with weak rule of law. Governments in the countries with weak rule of law, in turn, perceive migrants as an important driving force of FDI that can help a country compensate for its weaknesses in rule of law for the purposes of attracting FDI.
Los Objetos cotidianos, mientras la vida pasa
Creators: name: Pérez Vázquez, Erika Selene
Publisher: name: Redoma
Year: 2023

description: Son dos poemas que reflexionan frente a dos objetos cotidianos, mientras la vida pasa.
description: Redoma, Vol. 2 Núm. 8 (2023): Redoma, abril-junio 2023
Conservative Filtering for Heterogeneous Decentralized Data Fusion in Dynamic Robotic Systems
Creators: name: Dagan, Ofer
name: Ahmed, Nisar R.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Robotics (cs.RO)
subject: Multiagent Systems (cs.MA)
subject: FOS: Computer and information sciences

description: This paper presents a method for Bayesian multi-robot peer-to-peer data fusion where any pair of autonomous robots hold non-identical, but overlapping parts of a global joint probability distribution, representing real world inference tasks (e.g., mapping, tracking). It is shown that in dynamic stochastic systems, filtering, which corresponds to marginalization of past variables, results in direct and hidden dependencies between variables not mutually monitored by the robots, which might lead to an overconfident fused estimate. The paper makes both theoretical and practical contributions by providing (i) a rigorous analysis of the origin of the dependencies and and (ii) a conservative filtering algorithm for heterogeneous data fusion in dynamic systems that can be integrated with existing fusion algorithms. This work uses factor graphs as an analysis tool and an inference engine. Each robot in the network maintains a local factor graph and communicates only relevant parts of it (a sub-graph) to its neighboring robot. We discuss the applicability to various multi-robot robotic applications and demonstrate the performance using a multi-robot multi-target tracking simulation, showing that the proposed algorithm produces conservative estimates at each robot.
description: 8 pages, 5 figures, submitted to IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS 2022)
Functionalization of Single-Wall Carbon Nanotubes with Chromophores of Opposite Internal Dipole Orientation
Creators: name: Zhao, Yuanchun
name: Huang, Changshui
name: Kim, Myungwoong
name: Wong, Bryan M.
name: Léonard, François
name: Gopalan, Padma
name: Eriksson, Mark A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We report the functionalization of carbon nanotubes with two azobenzene-based chromophores with large internal dipole moments and opposite dipole orientations. The molecules are attached to the nanotubes non-covalently via a pyrene tether. A combination of characterization techniques shows uniform molecular coverage on the nanotubes, with minimal aggregation of excess chromophores on the substrate. The large on/off ratios and the sub-threshold swings of the nanotube-based field-effect transistors (FETs) are preserved after functionalization, and different shifts in threshold voltage are observed for each chromophore. Ab initio calculations verify the properties of the synthesized chromophores and indicate very small charge transfer, confirming a strong, non-covalent functionalization.
description: Accepted by ACS Applied Materials and Interfaces
Inventions on using sound and speech in GUI
Creators: name: Mishra, Umakant
Publisher: name: arXiv
Year: 2014
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: Voice Recognition (VR) facilitates a human interaction with the machine. VR may be used to replace the manual task of pushing buttons on a wireless telephone keypad. This is particularly useful when the hands of the user are busy with other activities like driving a car. However, the VRS system has several limitations. The VRS requires lot of training and customization in order to be effectively used by individual users as each individual falls into different voice patterns. Besides the voice interface is complex and is not as reliable as the keyboard or mouse. This article illustrates some interesting inventions on using sound and voice in Graphical User Interfaces.
description: 9 pages, 5 figures. Mishra, Umakant, Inventions on Using Sound and Speech in GUI (September 7, 2007). Available at SSRN: http://ssrn.com/abstract=1264688 or http://dx.doi.org/10.2139/ssrn.1264688
Towards More Efficient EfficientDets and Low-Light Real-Time Marine Debris Detection
Creators: name: Zocco, Federico
name: Huang, Ching-I
name: Wang, Hsueh-Cheng
name: Khyam, Mohammad Omar
name: Van, Mien
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Marine debris is a problem both for the health of marine environments and for the human health since tiny pieces of plastic called "microplastics" resulting from the debris decomposition over the time are entering the food chain at any levels. For marine debris detection and removal, autonomous underwater vehicles (AUVs) are a potential solution. In this letter, we focus on the efficiency of AUV vision for real-time and low-light object detection. First, we improved the efficiency of a class of state-of-the-art object detectors, namely EfficientDets, by 1.5% AP on D0, 2.6% AP on D1, 1.2% AP on D2 and 1.3% AP on D3 without increasing the GPU latency. Subsequently, we created and made publicly available a dataset for the detection of in-water plastic bags and bottles and trained our improved EfficientDets on this and another dataset for marine debris detection. Finally, we investigated how the detector performance is affected by low-light conditions and compared two low-light underwater image enhancement strategies both in terms of accuracy and latency. Source code and dataset are publicly available.
description: To be submitted to IEEE Robotics and Automation Letters