cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Statistical Physics of the Symmetric Group
Creators: name: Williams, Mobolaji
name: Shakhnovich, Eugene
Publisher: name: arXiv
Year: 2017
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Biomolecules (q-bio.BM)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Ordered chains (such as chains of amino acids) are ubiquitous in biological cells, and these chains perform specific functions contingent on the sequence of their components. Using the existence and general properties of such sequences as a theoretical motivation, we study the statistical physics of systems whose state space is defined by the possible permutations of an ordered list, i.e., the symmetric group, and whose energy is a function of how certain permutations deviate from some chosen correct ordering. Such a non-factorizable state space is quite different from the state spaces typically considered in statistical physics systems and consequently has novel behavior in systems with interacting and even non-interacting Hamiltonians. Various parameter choices of a mean-field model reveal the system to contain five different physical regimes defined by two transition temperatures, a triple point, and a quadruple point. Finally, we conclude by discussing how the general analysis can be extended to state spaces with more complex combinatorial properties and to other standard questions of statistical mechanics models.
description: 12 pages, 4 figures, 1 table
Observation of Skyrmions at Room Temperature in Co2FeAl Heusler Alloy Ultrathin Films
Creators: name: Husain, Sajid
name: Sisodia, Naveen
name: Chaurasiya, Avinash Kumar
name: Kumar, Ankit
name: Akanse, Serkan
name: Barman, Anjan
name: Mudulli, P. K.
name: Svedlindh, Peter
name: Chaudhary, Sujeet
Publisher: name: arXiv
Year: 2017
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Magnetic skyrmions are topological spin structures having immense potential for energy efficient spintronic devices. However, observations of skyrmions at room temperature are limited to patterned nanostructures. Here, we report the observation of stable skyrmions in unpatterned Ta/Co2FeAl(CFA)/MgO thin film heterostructures at room temperature and in zero external magnetic field employing magnetic force microscopy. The skyrmions are observed in a trilayer structure comprised of heavy metal (HM)/ferromagnet (FM)/Oxide interfaces which result in strong interfacial Dzyaloshinskii-Moriya interaction (i-DMI) as evidenced by Brillouin light scattering measurements, in agreement with the results of micromagnetic simulations. We also emphasize on room temperature observation of multiple skyrmions which can be stabilized for suitable choices of CFA layer thickness, perpendicular magnetic anisotropy, and i-DMI. These results open up a new paradigm for designing room temperature spintronic devices based on skyrmions in FM continuous thin films.
description: 21 pages, 10 figures, 1 table
Diffusion quantum Monte Carlo calculations of SrFeO${_3}$ and LaFeO${_3}$
Creators: name: Santana, Juan A.
name: Krogel, Jaron T.
name: Kent, Paul R. C.
name: Reboredo, Fernando A.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The equations of state, formation energy and migration energy barrier of the oxygen vacancy in SrFeO${_3}$ and LaFeO${_3}$ were calculated with the diffusion quantum Monte Carlo (DMC) method. Calculations were also performed with various Density Functional Theory (DFT) approximations for comparison. DMC reproduces the measured cohesive energies of these materials with errors below 0.23(5) eV and the structural properties within 1% of the experimental values. The DMC formation energies of the oxygen vacancy in SrFeO${_3}$ and LaFeO${_3}$ under oxygen-rich conditions are 1.3(1) and 6.24(7) eV, respectively. Similar calculations with semi-local DFT approximations for LaFeO$_3$ yielded vacancy formation energies 1.5 eV lower. Comparison of charge density evaluated with DMC and DFT approximations shows that DFT tends to overdelocalize the electrons in defected SrFeO${_3}$ and LaFeO${_3}$. Calculations with DMC and LDA yield similar vacancy migration energy barriers, indicating that steric/electrostatic effects mainly determine migration barriers in these materials.
description: 25 pages, 4 figures
Parallel and Limited Data Voice Conversion Using Stochastic Variational Deep Kernel Learning
Creators: name: Jafaryani, Mohamadreza
name: Sheikhzadeh, Hamid
name: Pourahmadi, Vahid
Publisher: name: arXiv
Year: 2023
Subjects: subject: Sound (cs.SD)
subject: Machine Learning (cs.LG)
subject: Multimedia (cs.MM)
subject: Audio and Speech Processing (eess.AS)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Typically, voice conversion is regarded as an engineering problem with limited training data. The reliance on massive amounts of data hinders the practical applicability of deep learning approaches, which have been extensively researched in recent years. On the other hand, statistical methods are effective with limited data but have difficulties in modelling complex mapping functions. This paper proposes a voice conversion method that works with limited data and is based on stochastic variational deep kernel learning (SVDKL). At the same time, SVDKL enables the use of deep neural networks' expressive capability as well as the high flexibility of the Gaussian process as a Bayesian and non-parametric method. When the conventional kernel is combined with the deep neural network, it is possible to estimate non-smooth and more complex functions. Furthermore, the model's sparse variational Gaussian process solves the scalability problem and, unlike the exact Gaussian process, allows for the learning of a global mapping function for the entire acoustic space. One of the most important aspects of the proposed scheme is that the model parameters are trained using marginal likelihood optimization, which considers both data fitting and model complexity. Considering the complexity of the model reduces the amount of training data by increasing the resistance to overfitting. To evaluate the proposed scheme, we examined the model's performance with approximately 80 seconds of training data. The results indicated that our method obtained a higher mean opinion score, smaller spectral distortion, and better preference tests than the compared methods.
The bunch current measurement using high-speed photodetector at HLS II
Creators: name: Zhou, Tian-Yu
name: Yang, Yong-Liang
name: Sun, Bao-Gen
name: Lu, Ping
name: Wu, Fang-Fang
name: Wang, Ji-Gang
name: Zhou, Ze-Ran
name: Luo, Qing
name: Wang, Qian
name: Li, Hao
Publisher: name: arXiv
Year: 2017
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: This contribution presents a novel bunch current measurement system based on an ultra-fast photodetector and a high-speed digitizer at Hefei Light Source II (HLS II). In order to achieve bunch-by-bunch resolution, the sampling rate of the system is nearly 225 GS/s via a dedicated equivalent sampling algorithm. According to preliminary tests of daily operation mode and single-bunch mode, the root-mean-square (rms) of current relative error distribution is 1.03%, which illustrates the new system satisfies requirements for high-precision bunch current measurement. In addition, experiment results of "HLS" Morse code fill pattern mode demonstrate this system also could be a convenient and robust tool for beam top-up mode in the future.
description: This paper has been withdrawn by the author due to a crucial sign error in equation 1
DMPlanner: An extensible and searchable catalogue for DMP resources
Creators: name: Vergoulis, Thanasis
name: Anargiros Tzerefos
name: Dalamagas, Theodore
name: Reczko, Martin
Publisher: name: F1000 Research Limited
Year: 2020

description: Since an increasing number of funding agencies request data management plans (DMPs) for R&D projects, drafting such plans has become a very important activity for researchers. Motivated by the fact that this is a tedious activity, a variety of Web resources have been developed, from templates and best-case examples to full-fledged wizards. However, since their number and variety is really large, it is difficult for researchers to explore those resources and determine the most suitable ones for their case. DMPlanner (https://dmplanner.athenarc.gr) is an extensible and searchable catalogue that alleviates this issue.
Protostellar accretion traced with chemistry. High resolution C18O and continuum observations towards deeply embedded protostars in Perseus
Creators: name: Frimann, Søren
name: Jørgensen, Jes K.
name: Dunham, Michael M.
name: Bourke, Tyler L.
name: Kristensen, Lars E.
name: Offner, Stella S. R.
name: Stephens, Ian W.
name: Tobin, John J.
name: Vorobyov, Eduard I.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Context: Understanding how accretion proceeds is a key question of star formation, with important implications for both the physical and chemical evolution of young stellar objects. In particular, very little is known about the accretion variability in the earliest stages of star formation. Aims: To characterise protostellar accretion histories towards individual sources by utilising sublimation and freeze-out chemistry of CO. Methods: A sample of 24 embedded protostars are observed with the Submillimeter Array (SMA) in context of the large program "Mass Assembly of Stellar Systems and their Evolution with the SMA" (MASSES). The size of the C$^{18}$O emitting region, where CO has sublimated into the gas-phase, is measured towards each source and compared to the expected size of the region given the current luminosity. The SMA observations also include 1.3 mm continuum data, which are used to investigate whether a link can be established between accretion bursts and massive circumstellar disks. Results: Depending on the adopted sublimation temperature of the CO ice, between 20% and 50% of the sources in the sample show extended C$^{18}$O emission indicating that the gas was warm enough in the past that CO sublimated and is currently in the process of refreezing; something which we attribute to a recent accretion burst. Given the fraction of sources with extended C$^{18}$O emission, we estimate an average interval between bursts of 20000-50000 yr, which is consistent with previous estimates. No clear link can be established between the presence of circumstellar disks and accretion bursts, however the three closest known binaries in the sample (projected separations <20 AU) all show evidence of a past accretion burst, indicating that close binary interactions may also play a role in inducing accretion variability.
description: Accepted for publication in A&A, 21 pages, 13 figures
Single-Particle Spectra in Relativistic Heavy-Ion Collisions Within the Thermal Quantum Field Theory
Creators: name: Anchishkin, Dmitry
Publisher: name: arXiv
Year: 2023
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A quantum generalization of the Cooper-Fry recipe is proposed. The single-particle spectrum arising from relativistic collisions of particles and nuclei is calculated within the thermal quantum field theory framework. The starting point of consideration is the solution of the initial-value problem of particle emission from a space-like hypersurface. In the following steps, we obtain the single-particle spectrum using the ``smaller'' Green's function associated with the fireball medium. Based on this result, several specific examples of particle emission are considered.
description: 28 pages, 4 figures
Additional file 1 of Integrative HLA typing of tumor and adjacent normal tissue can reveal insights into the tumor immune response
Creators: name: Sverchkova, Angelina
name: Burkholz, Scott
name: Rubsamen, Reid
name: Stratford, Richard
name: Clancy, Trevor
Publisher: name: figshare
Year: 2024
Subjects: subject: Immunology
subject: FOS: Clinical medicine

description: Additional file 1: Table S1. Table showing the accession numbers of the matched tumor-normal adjacent tissue pairs from the publicly available dataset GSE58135 as well as predicted HLA genotypes for classical HLA Class I genes. Table S2. Table showing HLA typing accuracies for OncoHLA and five tools of the benchmarking set on the GEUVADIS dataset with updated ground truth typing. Table S3. Table showing mean fold change in expression and P-values of HLA loci and B2M protein in ER+ HER2- primary tumor compared to matched normal adjacent tissues. Table S4. Table showing mean fold change in expression and P-values of HLA loci and B2M protein in TNBC primary tumor compared to matched normal adjacent tissues. Figure S1. Boxplots representing log-scaled allele-specific expression of HLA loci and B2M protein in two breast cancer subtypes and normal adjacent to tumor tissues. Figure S2. Volcano plot of differential gene expression of HLA loci and B2M protein in tumor versus matched normal adjacent tissues. Figure S3. Radar plots showing HLA/B2M expression in 20 ER+ tumor-normal adjacent tissue pairs from the publicly available dataset GSE58135. Figure S4. Radar plots showing HLA/B2M expression in 15 TNBC tumor-normal adjacent tissue pairs from the public dataset GSE58135.
Aussie Rock as Civic Literacy
Creators: name: Simpson, Rhiannon
Publisher: name: The University of Melbourne
Year: 2024
Subjects: classificationCode: 360303
subject: Music education
classificationCode: 390203
subject: Sociology of education
classificationCode: 430302
subject: Australian history
classificationCode: 360306
subject: Musicology and ethnomusicology
classificationCode: 390199
subject: Curriculum and pedagogy not elsewhere classified

description: 'Aussie Rock as Civic Literacy' was written and designed by Rhiannon Simpson to serve as a digital resource for inservice educators. It's proposed unit plan has been employed in 10 schools across Australia, and the document has served as an exemplar policy brief at Boston University, The University of Melbourne, McGill University, and The University of Western Ontario.
Linearized gravity in terms of differential forms
Creators: name: Baykal, Ahmet
name: Dereli, Tekin
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A technique to linearize gravitational field equations is developed in which the perturbation metric coefficients are treated as second rank, symmetric, 1-form fields belonging to the Minkowski background spacetime by using the exterior algebra of differential forms.
description: 17 pages, 56 references, typos fixed, published version
AdvanceAdvanced Virtual Manufacturing Systems
Creators: name: Soori, Mohsen
name: Arezoo, Behrooz
name: Dastres, Roza
Publisher: name: figshare
Year: 2023
Subjects: CAD/CAM systems
Manufacturing management

description: Advanced virtual manufacturing systems refer to highly sophisticated computer-based systems which simulate and optimize manufacturing processes in a virtual environment. Recently, many researchers have presented research works in different areas of simulation and analysis of manufacturing process in virtual environments such as cloud manufacturing, virtual training systems, virtual inspection systems, virtual process planning, flexible manufacturing systems, virtual manufacturing networks, virtual monitoring systems, virtual manufacturing for optimized production process, virtual machining systems and virtual commissioning systems. The advantages of virtual manufacturing systems include improving the quality of the produced components, decreasing the quantity of waste materials and accelerate product and process design using virtual simulation and modification. As a result, accuracy as well as efficiency in process of part manufacturing can be increased by applying the virtual environments to manufacturing operations. Moreover, digital marketing by using virtual manufacturing systems can increase the added value in the process of part production. To analyze and modify the processes of part production, recent achievements in virtual manufacturing systems are reviewed and presented in the study. The applications of virtual manufacturing systems in creating manufacturing processes are discussed, and future research works are also proposed. It has been discovered that reviewing and evaluating recent achievements in the published papers can promote the process of manufacturing engineering using virtual simulation and modification.
AdvanceAdvanced Virtual Manufacturing Systems
Creators: name: Soori, Mohsen
Publisher: name: figshare
Year: 2023
Subjects: CAD/CAM systems
Manufacturing management

description: Advanced virtual manufacturing systems refer to highly sophisticated computer-based systems which simulate and optimize manufacturing processes in a virtual environment. Recently, many researchers have presented research works in different areas of simulation and analysis of manufacturing process in virtual environments such as cloud manufacturing, virtual training systems, virtual inspection systems, virtual process planning, flexible manufacturing systems, virtual manufacturing networks, virtual monitoring systems, virtual manufacturing for optimized production process, virtual machining systems and virtual commissioning systems. The advantages of virtual manufacturing systems include improving the quality of the produced components, decreasing the quantity of waste materials and accelerate product and process design using virtual simulation and modification. As a result, accuracy as well as efficiency in process of part manufacturing can be increased by applying the virtual environments to manufacturing operations. Moreover, digital marketing by using virtual manufacturing systems can increase the added value in the process of part production. To analyze and modify the processes of part production, recent achievements in virtual manufacturing systems are reviewed and presented in the study. The applications of virtual manufacturing systems in creating manufacturing processes are discussed, and future research works are also proposed. It has been discovered that reviewing and evaluating recent achievements in the published papers can promote the process of manufacturing engineering using virtual simulation and modification.
Electronics and optoelectronics of quasi-one dimensional layered transition metal trichalcogenides
Creators: name: Island, Joshua O.
name: Molina-Mendoza, Aday J.
name: Barawi, Mariam
name: Biele, Robert
name: Flores, Eduardo
name: Clamagirand, Jose M.
name: Ares, Jose R.
name: Sanchez, Carlos
name: van der Zant, Herre S. J.
name: D'Agosta, Roberto
name: Ferrer, Isabel J.
name: Castellanos-Gomez, Andres
Publisher: name: arXiv
Year: 2017
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The isolation of graphene and transition metal dichalcongenides has opened a veritable world to a great number of layered materials which can be exfoliated, manipulated, and stacked or combined at will. With continued explorations expanding to include other layered materials with unique attributes, it is becoming clear that no one material will fill all the post-silicon era requirements. Here we review the properties and applications of layered, quasi-one dimensional transition metal trichalcogenides (TMTCs) as novel materials for next generation electronics and optoelectronics. The TMTCs present a unique chain-like structure which gives the materials their quasi-one dimensional properties such as high anisotropy ratios in conductivity and linear dichroism. The range of band gaps spanned by this class of materials (0.2 eV- 2 eV) makes them suitable for a wide variety of applications including field-effect transistors, infrared, visible and ultraviolet photodetectors, and unique applications related to their anisotropic properties which opens another degree of freedom in the development of next generation electronics. In this review we survey the historical development of these remarkable materials with an emphasis on the recent activity generated by the isolation and characterization of atomically thin titanium trisulfide (TiS3).
description: Topical review of the properties and applications of the transition metal trichalcogenides (TMTCs)
Non-Minimal Approximation for the Type-I Seesaw Mechanism
Creators: name: Dubinin, Mikhail
name: Fedotova, Elena
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: A non-minimal approximation for effective masses of light and heavy neutrinos in the framework of a type-I seesaw mechanism with three generations of sterile Majorana neutrinos which recover the symmetry between quarks and leptons is considered. The main results are: (a) the next-order corrections to the effective mass matrix of heavy neutrinos due to terms O(θMD) are obtained, which modify the commonly used representation for the effective mass (MD is a Dirac neutrino mass when the electroweak symmetry is spontaneously broken); and (b) the general form of the mixing matrix is found in non-minimal approximation parametrized by a complex 3x3 matrix satisfying a nontrivial constraint. Numerical analysis within the νMSM framework demonstrates the very small effect of new contributions of direct collider observables as opposed to their possible significance for cosmological models.
description: 23 pages, 1 figure, 3 tables
WiSARD: A Labeled Visual and Thermal Image Dataset for Wilderness Search and Rescue
Creators: name: Broyles, Daniel
name: Hayner, Christopher R.
name: Leung, Karen
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Sensor-equipped unoccupied aerial vehicles (UAVs) have the potential to help reduce search times and alleviate safety risks for first responders carrying out Wilderness Search and Rescue (WiSAR) operations, the process of finding and rescuing person(s) lost in wilderness areas. Unfortunately, visual sensors alone do not address the need for robustness across all the possible terrains, weather, and lighting conditions that WiSAR operations can be conducted in. The use of multi-modal sensors, specifically visual-thermal cameras, is critical in enabling WiSAR UAVs to perform in diverse operating conditions. However, due to the unique challenges posed by the wilderness context, existing dataset benchmarks are inadequate for developing vision-based algorithms for autonomous WiSAR UAVs. To this end, we present WiSARD, a dataset with roughly 56,000 labeled visual and thermal images collected from UAV flights in various terrains, seasons, weather, and lighting conditions. To the best of our knowledge, WiSARD is the first large-scale dataset collected with multi-modal sensors for autonomous WiSAR operations. We envision that our dataset will provide researchers with a diverse and challenging benchmark that can test the robustness of their algorithms when applied to real-world (life-saving) applications.
Canonical Analysis of Inhomogeneous Dark Energy Model and Theory of Limiting Curvature
Creators: name: Kluson, J.
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: This paper is devoted to the canonical analysis of inhomogeneous Dark Energy Model and the model of limiting curvature that were proposed recently by Chamseddine and V. Mukhanov. We argue these models are well defined and have similar properties as a system consisting from general gravity action and action for incoherent dust.
description: 16 pages, v2:Abstract changed, corrected conclusion related to the stability of the theory
Additional file 1 of MIWE: detecting the critical states of complex biological systems by the mutual information weighted entropy
Creators: name: Xie, Yuke
name: Peng, Xueqing
name: Li, Peiluan
Publisher: name: figshare
Year: 2024
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 1. Supplementary materials, figures, tables.
The intrinsically disordered proteins community roadmap
Creators: name: Piovesan, Damiano
name: Tosatto, Silvio
name: Dosztanyi, Zsuzsanna
name: Davey, Norman
Publisher: name: F1000 Research Limited
Year: 2020

description: Intrinsically disordered proteins (IDPs) and intrinsically disordered regions (IDRs) are now recognised as major determinants in cellular regulation. Since May 2019, the computational IDP field is represented by an official ELIXIR user community. The ELIXIR IDP Community has grown out of the NGP-NET COST Action, a scientific cooperation funded in 2015 under a Horizon 2020 EU Framework Programme. Since 2017 a series of strategic workshops has been organized with the objective of the integration of IDP-related data and computational resources into the ELIXIR framework
The Twisted Radio Structure of PSO J334.2028+01.4075, Still a Supermassive Binary Black Hole Candidate
Creators: name: Mooley, K. P.
name: Wrobel, J. M.
name: Anderson, M. M.
name: Hallinan, G.
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Supermassive binary black holes (BBHs) on sub-parsec scales are prime targets for gravitational wave experiments. They also provide insights on close binary evolution and hierarchical structure formation. Sub-parsec BBHs cannot be spatially resolved but indirect methods can identify candidates. In 2015 Liu et al. reported an optical-continuum periodicity in the quasar PSO J334.2028+01.4075, with the estimated mass and rest-frame period suggesting an orbital separation of about 0.006 pc (0.7 micro-arcsec). The persistence of the quasar's optical periodicity has recently been disfavored over an extended baseline. However, if a radio jet is launched from a sub-parsec BBH, the binary's properties can influence the radio structure on larger scales. Here, we use the Very Long Baseline Array (VLBA) and Karl G. Jansky Very Large Array (VLA) to study the parsec- and kiloparsec-scale emission energized by the quasar's putative BBH. We find two VLBA components separated by 3.6 mas (30 pc), tentatively identifying one as the VLBA "core" from which the other was ejected. The VLBA components contribute to a point-like, time-variable VLA source that is straddled by lobes spanning 8 arcsec (66 kpc). We classify PSO J334.2028+01.4075 as a lobe-dominated quasar, albeit with an atypically large twist of 39 deg between its elongation position angles on parsec- and kiloparsec-scales. By analogy with 3C 207, a well-studied lobe-dominated quasar with a similarly-rare twist, we speculate that PSO J334.2028+01.4075 could be ejecting jet components over an inner cone that traces a precessing jet in a BBH system.
description: 6 pages, 3 figures, 3 tables. Accepted for publication in MNRAS
Additional file 1 of Psychometric evaluation of the Persian version of the Sense of Belonging in Nursing School (SBNS): a quantitative and cross-sectional design
Creators: name: Mirhosseini, Seyedmohammad
name: Sharif-Nia, Hamid
name: Esmaeili, Maede
name: Ameri, Fatemeh
name: Khosravi, Hamed
name: Abbasi, Ali
name: Ebrahimi, Hossein
Publisher: name: figshare
Year: 2024
Subjects: Space Science
Environmental Sciences not elsewhere classified
Biological Sciences not elsewhere classified
Science Policy

description: Additional file 1.
Existence proof of librational invariant tori in an averaged model of HD60532 planetary system
Creators: name: Danesi, Veronica
name: Locatelli, Ugo
name: Sansottera, Marco
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We investigate the long-term dynamics of HD60532, an extrasolar system hosting two giant planets orbiting in a 3:1 mean motion resonance. We consider an average approximation at order one in the masses which results (after the reduction of the constants of motion) in a resonant Hamiltonian with two libration angles. In this framework, the usual algorithms constructing the Kolmogorov normal form approach do not easily apply and we need to perform some untrivial preliminary operations, in order to adapt the method to this kind of problems. First, we perform an average over the fast angle of libration which provides an integrable approximation of the Hamiltonian. Then, we introduce action-angle variables that are adapted to such an integrable approximation. This sequence of preliminary operations brings the Hamiltonian in a suitable form to successfully start the Kolmogorov normalization scheme. The convergence of the KAM algorithm is proved by applying a technique based on a computer-assisted proof. This allows us to reconstruct the quasi-periodic motion of the system, with initial conditions that are compatible with the observations.
Probing many-body localization with neural networks
Creators: name: Schindler, Frank
name: Regnault, Nicolas
name: Neupert, Titus
Publisher: name: arXiv
Year: 2017
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We show that a simple artificial neural network trained on entanglement spectra of individual states of a many-body quantum system can be used to determine the transition between a many-body localized and a thermalizing regime. Specifically, we study the Heisenberg spin-1/2 chain in a random external field. We employ a multilayer perceptron with a single hidden layer, which is trained on labeled entanglement spectra pertaining to the fully localized and fully thermal regimes. We then apply this network to classify spectra belonging to states in the transition region. For training, we use a cost function that contains, in addition to the usual error and regularization parts, a term that favors a confident classification of the transition region states. The resulting phase diagram is in good agreement with the one obtained by more conventional methods and can be computed for small systems. In particular, the neural network outperforms conventional methods in classifying individual eigenstates pertaining to a single disorder realization. It allows us to map out the structure of these eigenstates across the transition with spatial resolution. Furthermore, we analyze the network operation using the dreaming technique to show that the neural network correctly learns by itself the power-law structure of the entanglement spectra in the many-body localized regime.
description: 12 pages, 10 figures
An ancestral axial twist explains the contralateral forebrain and the optic chiasm in vertebrates
Creators: name: de Lussanet, Marc H. E.
name: Osse, Jan W. M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: Tissues and Organs (q-bio.TO)
subject: FOS: Biological sciences

description: Among the best-known facts of the brain are the contralateral visual, auditory, sensational, and motor mappings in the forebrain. How and why did these evolve? The few theories to this question provide functional answers, such as better networks for visuomotor control. However, these theories contradict the data, as discussed here. Instead we propose that a 90-deg left-turn around the body-axis evolved in a common ancestor of all vertebrates. Compensatory migrations of the tissues during development restore body symmetry. Eyes, nostrils and forebrain compensate in the direction of the turn, whereas more caudal structures migrate in the opposite direction. As a result of these opposite migrations the forebrain becomes crossed and inverted with respect to the rest of the nervous system. We show that these compensatory migratory movements can indeed be observed in the zebrafish (Danio rerio) and the chick (Gallus gallus). With a model we show how the axial twist hypothesis predicts that an optic chiasm should develop on the ventral side of the brain, whereas the olfactory tract should be uncrossed. In addition, the hypothesis explains the decussation of the trochlear nerve, why olfaction is non-crossed, why the cerebellar hemispheres represent the ipsilateral bodyside, why in sharks the forebrain halves each represent the ipsilateral eye, why the heart and other inner organs are asymmetric in the body. Due to the poor fossil record, the possible evolutionary scenarios remain speculative. Molecular evidence does support the hypothesis. The findings may throw new insight on the problematic structure of the forebrain.
description: 13 pages, 6 figures. A small correction is made (May 2014): see footnote 2; a new stable link is provided for the Appendix
Control and Energy Management System in Microgrids
Creators: name: Pourbabak, Hajir
name: Chen, Tao
name: Zhang, Bowen
name: Su, Wencong
Publisher: name: arXiv
Year: 2017
Subjects: subject: Systems and Control (eess.SY)
subject: Information Theory (cs.IT)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: As a cutting-edge technology, microgrids feature intelligent EMSs and sophisticated control, which will dramatically change our energy infrastructure. The modern microgrids are a relatively recent development with high potential to bring distributed generation, DES devices, controllable loads, communication infrastructure, and many new technologies into the mainstream. As a more controllable and intelligent entity, a microgrid has more growth potential than ever before. However, there are still many open questions, such as the future business models and economics. What is the cost-benefit to the end-user? How should we systematically evaluate the potential benefits and costs of control and energy management in a microgrid?
description: 25 pages, 12 figures, Book Chapter in Clean Energy Microgrids, Editors: Shin'ya Obara, Jorge Morel (2017)
Unusual magnetic hysteresis and transition between vortex to double pole states arising from interlayer coupling in diamond shaped nanostructures
Creators: name: Parente, A.
name: Navarro, H.
name: Vargas, N. M.
name: Lapa, P.
name: Basaran, Ali C.
name: González, E. M.
name: Redondo, C.
name: Morales, R.
name: Noval, A. Munoz
name: Schuller, Ivan K.
name: Vicent, J. L.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Controlling the magnetic ground states at the nanoscale is a long-standing basic research problem and an important issue in magnetic storage technologies. Here, we designed a nanostructured material that exhibits very unusual hysteresis loops due to a transition between vortex and double pole states. Arrays of 700 nm diamond-shape nanodots consisting of Py(30 nm)/Ru(tRu)/Py(30 nm) (Py, permalloy (Ni80Fe20)) trilayers were fabricated by interference lithography and e-beam evaporation. We show that varying the Ru interlayer spacer thickness (tRu) governs the interaction between the Py layers. We found this interaction mainly mediated by two mechanisms: magnetostatic interaction that favors antiparallel (antiferromagnetic, AFM) alignment of the Py layers and exchange interaction that oscillates between ferromagnetic (FM) and AFM couplings. For a certain range of Ru thicknesses, FM coupling dominates and forms magnetic vortices in the upper and lower Py layers. For Ru thicknesses at which AFM coupling dominates, the magnetic state in remanence is a double pole structure. Our results showed that the interlayer exchange coupling interaction remains finite even at 4 nm Ru thickness. The magnetic states in remanence, observed by Magnetic Force Microscopy (MFM), are in good agreement with corresponding hysteresis loops obtained by Magneto-Optic Kerr Effect (MOKE) and micromagnetic simulations.
description: 16 pages, 4 figures, 1table
Toric Kähler metrics seen from infinity, quantization and compact tropical amoebas
Creators: name: Baier, Thomas
name: Florentino, Carlos
name: Mourão, José M.
name: Nunes, João P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Differential Geometry (math.DG)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 53D50, 14M25, 32G05

description: We consider the metric space of all toric Kähler metrics on a compact toric manifold; when "looking at it from infinity" (following Gromov), we obtain the tangent cone at infinity, which is parametrized by equivalence classes of complete geodesics. In the present paper, we study the associated limit for the family of metrics on the toric variety, its quantization, and degeneration of generic divisors. The limits of the corresponding Kähler polarizations become degenerate along the Lagrangian fibration defined by the moment map. This allows us to interpolate continuously between geometric quantizations in the holomorphic and real polarizations and show that the monomial holomorphic sections of the prequantum bundle converge to Dirac delta distributions supported on Bohr-Sommerfeld fibers. In the second part, we use these families of toric metric degenerations to study the limit of compact hypersurface amoebas and show that in Legendre transformed variables they are described by tropical amoebas. We believe that our approach gives a different, complementary, perspective on the relation between complex algebraic geometry and tropical geometry.
description: v1: 32 pages, 5 figures; v2: 1 figure added; v3: 1 reference added; v4: some reorganization, 1 theorem (now 1.1) added; v5: final version, to appear in JDG
Locarno-Orselina: Albergo Orselina
Creators: name: [S.N.]
Publisher: name: [s.n.]
Year: 1944

description: Enthält: 1 Postkarte; 2 Prospekte inkl. Preisliste
description: Darin: Strandbad mit Badenden (im Prospekt)
description: Bauherr: A. Amstutz; Bauvorhaben: Ausbau einer neuen Küche mit gleichzeitiger Vergrösserung des Frühstückraumes, neuer Diensten-Eingang neben Magazin (bewilligt)
description: Archivalienart: Manuskript, Bildmaterial
A remark on "Connections and Higgs fields on a principal bundle"
Creators: name: Biswas, Indranil
name: Florentino, Carlos
Publisher: name: arXiv
Year: 2011
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 32L05, 53C07

description: We show that a unipotent vector bundle on a non-Kaehler compact complex manifold does not admit a flat holomorphic connection in general. We also construct examples of topologically trivial stable vector bundle on compact Gauduchon manifold that does not admit any unitary flat connection.
description: Annals of Global Analysis and Geometry (to appear)
Emergency Critical Care: An Integrative Approach for Surgeons
Creators: name: Matthew Dylan, Monica
Publisher: name: Zenodo
Year: 2022

description: This comprehensive review explores the synergistic integration of surgical and critical care expertise in the realm of Emergency Critical Care (ECC). Focused on optimizing outcomes for critically ill surgical patients, the abstract delves into the collaborative strategies employed by surgeons and critical care teams. Through a synthesis of current literature, the review aims to elucidate the tangible benefits, challenges, and future directions in implementing an integrative approach to ECC, emphasizing the transformative impact on patient care in high-acuity surgical scenarios.
Primary operations in differential cohomology
Creators: name: Grady, Daniel
name: Sati, Hisham
Publisher: name: arXiv
Year: 2016
Subjects: subject: Algebraic Topology (math.AT)
subject: Mathematical Physics (math-ph)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We characterize primary operations in differential cohomology via stacks, and illustrate by differentially refining Steenrod squares and Steenrod powers explicitly. This requires a delicate interplay between integral, rational, and mod p cohomology, as well as cohomology with U(1) coefficients and differential forms. Along the way we develop computational techniques in differential cohomology, including a Künneth decomposition, that should also be useful in their own right, and point to applications to higher geometry and mathematical physics.
description: 36 pages; corrections made to the statement and proof of the K\"unneth formula
$PBW$-deformations of graded rings
Creators: name: Ardizzoni, Alessandro
name: Saracco, Paolo
name: Ştefan, Dragoş
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Algebra (math.QA)
subject: K-Theory and Homology (math.KT)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 17C25 (Primary), 16W50, 16E40 (Secondary)

description: We prove in a very general framework several versions of the classical Poincaré-Birkhoff-Witt Theorem, which extend results from [BeGi, BrGa, CS, HvOZ, WW]. Applications and examples are discussed in the last part of the paper.
Optimal a priori error estimates of parabolic optimal control problems with a moving point control
Creators: name: Leykekhman, Dmitriy
name: Vexler, Boris
Publisher: name: arXiv
Year: 2017
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: In this paper we consider a parabolic optimal control problem with a Dirac type control with moving point source in two space dimensions. We discretize the problem with piecewise constant functions in time and continuous piecewise linear finite elements in space. For this discretization we show optimal order of convergence with respect to the time and the space discretization parameters modulo some logarithmic terms. Error analysis for the same problem was carried out in the recent paper [17], however, the analysis there contains a serious flaw. One of the main goals of this paper is to provide the correct proof. The main ingredients of our analysis are the global and local error estimates on a curve, that have an independent interest.
Coexistence of periodic-2 and periodic-3 caustics for nearly circular analytic billiard maps
Creators: name: Kaloshin, Vadim
name: Zhang, Jianlu
Publisher: name: arXiv
Year: 2017
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37E40, 70H09

description: For symmetrically analytic deformation of the circle (with certain Fourier decaying rate), the necessary condition for the corresponding billiard map to keep the coexistence of periodic $2,3$ caustics is that the deformation has to be an isometric transformation.
Tumor de Buschke-Lowenstein: tratamiento quirúrgico y uso de plasma rico en plaquetas. Reporte de un caso.
Creators: name: Arturo Herrera Cervantes
Publisher: name: Zenodo
Year: 2024

description: Antecedentes: el tratamiento del tumor de Buschke-Löwenstein es totalmente quirúrgico, sin embargo frecuentemente el resultado estético es desfavorable. Objetivo: presentar un caso de tumor de Buschke-Löwenstein, tratado quirúrgicamente y posterior manejo con PRP (plasma rico en plaquetas) con resultados estéticos favorables. Caso Clínico: paciente de 28  años, con diagnóstico de infección de VPH de bajo riesgo, con condiloma genital gigante, además de diagnóstico de VIH en tratamiento. Se programa para resección de tumor con láser CO2 y con protocolo de aplicación de PRP, sin complicaciones. Conclusiones: el tumor de Buschke-Löwenstein es una neoplasia poco común relacionada con inmunosupresión, la resección quirúrgica es el tratamiento más utilizado, sin embargo, los resultados estéticos no son de los más adecuados, la aplicación de PRP promete ser un manejo post quirúrgico en este tipo de patologías

Background: The treatment of Buschke-Löwenstein tumor is completely surgical, however the aesthetic result is frequently unfavorable. Objective: To present a case of Buschke-Löwenstein tumor, treated surgically and subsequent management with PRP (platelet rich plasma) with favorable aesthetic results. Clinical Case: 28-year-old patient, diagnosed with low risk HPV infection, with giant genital condyloma, in addition to diagnosed with HIV undergoing treatment. The tumor was scheduled for resection with CO2 laser and with a PRP application protocol, without complications. Conclusions: Buschke-Löwenstein tumor is a rare neoplasm related to immunosuppression, surgical resection is the most used treatment, however, the aesthetic results are not the most adequate, the application of PRP promises to be a post-surgical management in this type of pathologies
MigraR: an open-source, R-based application for analysis and quantification of cell migration parameters
Creators: name: Shajia, Nirbhaya
name: Nunes, Florbela
name: Rocha, M. Ines
name: Gomes, Elsa Ferreira
name: Castro, Helena
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantitative Methods (q-bio.QM)
subject: Cell Behavior (q-bio.CB)
subject: FOS: Biological sciences

description: Background and objective: Cell migration is essential for many biological phenomena with direct impact on human health and disease. One conventional approach to study cell migration involves the quantitative analysis of individual cell trajectories recorded by time-lapse video microscopy. Dedicated software tools exist to assist the automated or semi-automated tracking of cells and translate these into coordinate positions along time. However, cell biologists usually bump into the difficulty of plotting and computing these data sets into biologically meaningful figures and metrics. Methods: This report describes MigraR, an intuitive graphical user interface executed from the RStudioTM (via the R package Shiny), which greatly simplifies the task of translating coordinate positions of moving cells into measurable parameters of cell migration (velocity, straightness, and direction of movement), as well as of plotting cell trajectories and migration metrics. One innovative function of this interface is that it allows users to refine their data sets by setting limits based on time, velocity and straightness. Results: MigraR was tested on different data to assess its applicability. Intended users of MigraR are cell biologists with no prior knowledge of data analysis, seeking to accelerate the quantification and visualization of cell migration data sets delivered in the format of Excel files by available cell-tracking software. Conclusions: Through the graphics it provides, MigraR is an useful tool for the analysis of migration parameters and cellular trajectories. Since its source code is open, it can be subject of refinement by expert users to best suit the needs of other researchers. It is available at GitHub and can be easily reproduced.
Quantum-Resistant Cryptography: Developing Encryption Against Quantum Attacks
Creators: name: Mohammed, Anwar
Publisher: name: figshare
Year: 2025
Subjects: classificationCode: 461307
subject: Quantum computation
classificationCode: 460401
subject: Cryptography

description: Quantum computing presents both extraordinary potential and a significant threat to modern cryptographic systems. As the computational power of quantum computers grows, so too does the risk of rendering traditional encryption methods—especially those relying on factorization and discrete logarithms—obsolete. Quantum-resistant cryptography, also known as post quantum cryptography, aims to develop new cryptographic protocols that can resist the capabilities of quantum computers. This paper explores the advancements in quantum computing, the vulnerabilities it presents to existing cryptographic systems, and the development of quantum-resistant algorithms. We highlight leading approaches in lattice-based, hash-based, code-based, multivariate quadratic, and isogeny-based cryptography and discuss the challenges associated with transitioning to quantum-resistant encryption standards.