cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Design and Implementation of a Multiprotocol IoT Gateway
Creators: name: Macias, Jose
name: Pinilla, Harold
name: Castellanos, Wilder
name: Alvarado, Jose
name: Sánchez, Andres
Publisher: name: arXiv
Year: 2020
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences
subject: 68N01 (Primary), 68N99 (Secondary)

description: In the coming years, the interconnection of a large number of devices is expected, which will lead to a new form of interaction between the real and the virtual world. In this promising scenario, known as the Internet of Things, it is expected that different objects, such as sensors, industrial robots, cars, appliances, will be connected to the Internet. One of the main challenges of the Internet of Things is the interoperability of highly heterogeneous devices, mainly in terms of the communication capabilities and network protocols used. As consequence, the interconnection model of the different devices involves an intermediary device, known as gateway. This gateway is a centralized element for the management of the devices that make up an IoT application. In addition, it is essential for the transmission of information to the Internet, especially when many IoT devices are not IP-based. This paper describes the implementation of an IoT gateway that allows the exchange of data through different wireless technologies and forwarding of such data to the Internet. The proposed gateway has important advantages such as: supporting for multiprotocol interconnectivity; remote configuration of wireless nodes for sensor and actuators management; a flexible algorithm to translate the data obtained by sensors into a uniform format for transmission to a cloud server; low energy consumption due to efficient data transfer over the MQTT protocol. In order to demonstrate the usefulness of the developed gateway, a proof-of-concept test was implemented. The implemented scenario consists of 2 wireless nodes responsible for sensing environmental variables and transmitting data to the gateway node through different communication protocols. The obtained results show the feasibility for simultaneous data transmission from the remote wireless nodes to the gateway.
description: 20 pages, in Spanish. 15 figures. Work presented in XIV International Conference of Electronics, Control and Telecommunications (CIECT). Bogota. Colombia. 2019 Proceedings: Transformacion digital incluyente para el avance tecnologico y social ISBN: 978-958-44-5254-2 VOL.13
Ommatius elusivus Scarbrough, In Scarbrough & Perez-Gelabert 2003
Creators: name: Scarbrough, Aubrey G.
name: Perez-Gelabert, Daniel E.
Publisher: name: Zenodo
Year: 2006
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Asilidae
Ommatius
Ommatius elusivus

description: Ommatius elusivus Scarbrough
(Table 1, Figs. 45, 52)
 Ommatius elusivus Scarbrough, In Scarbrough & Perez-Gelabert, 2003: 46. Type locality: Dominican Republic, PNAB, Santiago province, type: ♂ (USNM).
 New records. DOMINICAN REPUBLIC: RD-250 La Ciénaga –Los / Tablones, PN Armando Bermúdez, La Vega prov., 19 o 04.004'N 70 o 51.789'W / 1,100–1,270 m, 29.vi.2004 / D.Perez (d) (1 ♂, 4 ♀, USNM); La Vega prov., P.N. Armando / Bermúdez, La Ciénaga de / Manabao, 19 o 04.022'N 71 o 51. / 849'W, 1183 m, 19.viii.2006, D.Perez, R.Bastardo, B.Hierro (8 ♀ USNM); RD-250 La Ciénaga – Los / Tablones, PN Armando / Bermúdez, La Vega prov., / 19 o 04.044'N 70 o 51.789'W. / 1,100–1,270 m, 17.vii.2004, / D.Perez (d) (1 ♂, 4 ♀ MHND).
Distribution. Captured between 740 and 1270 m from May through August in La Vega and Santiago provinces.
 Remarks. Ommatius elusivus is distinguished from congeners by the characters in the key. It is associated with montane forests at intermediate to high elevations. The type series was taken from May through July (Scarbrough & Perez-Gelabert, 2003). Here we extend its distribution through August.
description: Published as part of Scarbrough, Aubrey G. & Perez-Gelabert, Daniel E., 2006, A review of the asilid (Diptera) fauna from Hispaniola with six genera new to the island, fifteen new species, and checklist, pp. 1-91 in Zootaxa 1381 on pages 49-51
Instantons and Scalar Multiquark States: From Small to Large N_c
Creators: name: Schaefer, Thomas
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We study scalar quark-anti-quark and two-quark-two-anti-quark correlation functions in the instanton liquid model. We show that the instanton liquid supports a light scalar-isoscalar (sigma) meson, and that this state is strongly coupled to both $(\bar{q}q)$ and $(\bar{q}q)^2$. The scalar-isovector $a_0$ meson, on the other hand, is heavy. We also show that these properties are specific to QCD with three colors. In the large $N_c$ limit the scalar-isoscalar meson is not light, and it is mainly coupled to $(\bar{q}q)$.
description: 24 pages
Data management best practices for geospatial storytelling
Creators: name: Kernik, Melinda
Publisher: name: Zenodo
Year: 2018

description: Geospatial storytelling has become increasingly popular in academia as a way to communicate research findings and as a replacement for more conventional class assignments. Integrating digital maps with text, images, and other media, story maps are used in a wide range of disciplines from digital humanities to the sciences. Story maps exist, however, in an ever shifting landscape of spatial data services and digital resources -- putting the long-term durability of projects into question. Using Esri Story Maps as a case study, this presentation describes data management best practices for keeping these stories functioning effectively, including strategies for minimizing broken links and navigating the copyright status of "open" data layers. We will also discuss options for backing up story map content and what happens to a project if its creator ceases to have access to an organizational account.
Mathematical Modeling to Minimize Tritium Inventory of the Fuel Cycle of ITER
Creators: name: Suh-Young Lee
name: Chang, Min Ho
name: Jae-Uk Lee
name: Ha, Jin-Kuk
name: Sei-Hun Yun
name: In-Beum Lee
name: Euy Soo Lee
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biophysics
subject: Space Science
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Science Policy

description: This paper proposes a mathematical model for the optimal operation of the fuel cycle of ITER. The developed model aims to minimize the tritium inventory in the fuel cycle by adopting a two-phased scheduling approach. To consider multiple equipment in the fuel cycle, the proposed solving algorithm is designed as sequential scheduling models: (Phase I) to minimize tritium inventory in the vacuum roughing system and (Phase II) to minimize tritium working inventory in the isotope separation system. The scheduling models are developed based on a state-task-network method. Given a required amount of tritium for fueling scenarios considering ramp-up, flat-top, and ramp-down, the proposed model provides the optimal operation plan for deuterium-tritium plasma operation including information on fueling rate, duration, and timing between each unit. Among six case studies, the noninductive tokamak operation mode with high tritium demands showed the highest tritium working inventory during one burn-and-dwell cycle.
Interpreting the Relationship Between Galaxy Luminosity, Color and Environment
Creators: name: Berlind, Andreas A.
name: Blanton, Michael R.
name: Hogg, David W.
name: Weinberg, David H.
name: Davé, Romeel
name: Eisenstein, Daniel J.
name: Katz, Neal
name: .
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study the relationship between galaxy luminosity, color, and environment in a cosmological simulation of galaxy formation. We compare the predicted relationship with that found for SDSS galaxies and find that the model successfully predicts most of the qualitative features seen in the data, but also shows some interesting differences. Specifically, the simulation predicts that the local density around bright red galaxies is a strong increasing function of luminosity, but does not depend much on color at fixed luminosity. Moreover, we show that this is due to central galaxies in dark matter halos whose baryonic masses correlate strongly with halo mass. The simulation also predicts that the local density around blue galaxies is a strong increasing function of color, but does not depend much on luminosity at fixed color. We show that this is due to satellite galaxies in halos whose stellar ages correlate with halo mass. Finally, the simulation fails to predict the luminosity dependence of environment observed around low luminosity red galaxies. However, we show that this is most likely due to the simulation's limited resolution. A study of a higher resolution, smaller volume simulation suggests that this dependence is caused by the fact that all low luminosity red galaxies are satellites in massive halos, whereas intermediate luminosity red galaxies are a mixture of satellites in massive halos and central galaxies in less massive halos.
description: 8 pages including 5 figures (emulateapj). Submitted to ApJ
AuthCODE: A Privacy-preserving and Multi-device Continuous Authentication Architecture based on Machine and Deep Learning
Creators: name: Sánchez, Pedro Miguel Sánchez
name: Celdrán, Alberto Huertas
name: Maimó, Lorenzo Fernández
name: Pérez, Gregorio Martínez
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: The authentication field is evolving towards mechanisms able to keep users continuously authenticated without the necessity of remembering or possessing authentication credentials. While existing continuous authentication systems have demonstrated their suitability for single-device scenarios, the Internet of Things and next generation of mobile networks (5G) are enabling novel multi-device scenarios -- such as Smart Offices -- where continuous authentication is still an open challenge. The paper at hand, proposes an AI-based, privacy-preserving and multi-device continuous authentication architecture called AuthCODE. A realistic Smart Office scenario with several users, interacting with their mobile devices and personal computer, has been used to create a set of single- and multi-device behavioural datasets and validate AuthCODE. A pool of experiments with machine and deep learning classifiers measured the impact of time in authentication accuracy and improved the results of single-device approaches by considering multi-device behaviour profiles. The f1-score average reached for XGBoost on multi-device profiles based on 1-minute windows was 99.33%, while the best performance achieved for single devices was lower than 97.39%. The inclusion of temporal information in the form of vector sequences classified by a Long-Short Term Memory Network, allowed the identification of additional complex behaviour patterns associated to each user, resulting in an average f1-score of 99.02% on identification of long-term behaviours.
Creating critical thinkers in Geographic Information System (GIS) workshops
Creators: name: Murack, Jennie
Publisher: name: Zenodo
Year: 2018

description: GIS Services in the Massachusetts Institute of Technology (MIT) Libraries has a long tradition of hosting short, one-session GIS workshops that are open to the entire MIT Community. Because GIS support is not available in most departments, many students, faculty, and staff turn to GIS Services to learn software and mapping skills for the first time. Based on workshop feedback and a new vision for the Libraries as a whole, we recently transformed our introductory workshops from software-centric to focusing on the critical skills necessary for participants to become thoughtful map makers and GIS users. We developed and executed a process to incorporate data literacy, cartography skills, and critical cartography values into the workshops. This presentation will discuss the reasons we decided to revamp our workshops, the process we used to develop them, and the techniques we used to teach both critical thinking skills and software skills in one, three-hour workshop. Attendees will learn how to modify their own teaching from software-focused workshops to those that emphasize critical thinking and data literacy skills. The presentation will also provide specific examples of how to do so in GIS instruction.
SDN-controlled and Orchestrated OPSquare DCN Enabling Automatic Network Slicing with Differentiated QoS Provisioning
Creators: name: Xue, Xuwei
name: Wang, Fu
name: Agraz, Fernando
name: Pagès, Albert
name: Pan, Bitao
name: Yan, Fulong
name: Guo, Xiaotao
name: Spadaro, Salvatore
name: Calabretta, Nicola
Publisher: name: arXiv
Year: 2020
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: In this work, we propose and experimentally assess the automatic and flexible NSs configurations of optical OPSquare DCN controlled and orchestrated by an extended SDN control plane for multi-tenant applications with differentiated QoS provisioning. Optical Flow Control (OFC) protocol has been developed to prevent packet losses at switch sides caused by packet contentions.Based on the collected resource topology of data plane, the optical network slices can be dynamically provisioned and automatically reconfigured by the SDN control plane. Meanwhile, experimental results validate that the priority assignment of application flows supplies dynamic QoS performance to various slices running applications with specific requirements in terms of packet loss and transmission latency. In addition, the capability of exposing traffic statistics information of data plane to SDN control plane enables the implementation of load balancing algorithms further improving the network performance with high QoS. No packet loss and less than 4.8 us server-to-server latency can be guaranteed for the sliced network with highest priority at a load of 0.5.
Acetylthiostearates – mass spectroscopy and NMR characterization
Creators: name: Bantchev, Grigor B.
name: Vermillion, Karl E.
name: Girma Biresaw
name: Berhow, Mark A.
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biochemistry
subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Cancer
subject: Inorganic Chemistry
subject: Plant Biology

description: Oleic and linoleic acids are common fatty acids in commodity vegetable oils. Their modification into sulfur-containing molecules can be a route for producing biobased lubricants. We investigated modification of methyl oleate and methyl linoleate with thioacetic acid using UV-initiated thio-ene reaction to obtain methyl (acetylthio)stearates and methyl bis(acetylthio)stearates, respectively. Small amounts of acetyldithio derivatives were also detected. The products were characterized by Electron Impact Mass Spectrometry, High Resolution Mass Spectrometry, and 1- and 2-D NMR. The MS confirmed the anticipated molecular formulas. The fragmentation patterns can be explained with predominant breakage of carbon–sulfur bonds. The isomers of methyl bis(acetylthio)stearates were partially separated by chromatography, and some characteristic NMR peaks were identified and compared with the ones predicted by software. NMR showed distinct patterns of the quasi-meso- and quasi-rac- forms of the isomers. Most often thioacetates are used as protecting groups or intermediary of thiol groups.
Axial-vector Form Factors for $K_{\ell 2γ}$ and $π_{\ell 2γ}$ at $O(p^6)$ in Chiral Perturbation Theory
Creators: name: Geng, C. Q.
name: Ho, I-Lin
name: Wu, T. H.
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present two-loop calculations on the axial-vector form factors $F_A$ of semileptonic radiative kaon and pion decays in chiral perturbation theory. The relevant dimension-6 terms of the lagrangian are evaluated from the resonance contribution and the results of the irreducible two-loop graphs of the sunset topology are given in detail. We also explicitly show that the divergent parts in $F_A$ are cancelled exactly as required.
description: 36 pages, 6 Figures, version to be published in Nucl. Phys. B
Bosons Outperform Fermions -- The Thermodynamic Advantage of Symmetry
Creators: name: Myers, Nathan M.
name: Deffner, Sebastian
Publisher: name: arXiv
Year: 2019
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We examine a quantum Otto engine with a harmonic working medium consisting of two particles to explore the use of wave function symmetry as an accessible resource. It is shown that the bosonic system displays enhanced performance when compared to two independent single particle engines, while the fermionic system displays reduced performance. To this end, we explore the trade-off between efficiency and power output and the parameter regimes under which the system functions as engine, refrigerator, or heater. Remarkably, the bosonic system operates under a wider parameter space both when operating as an engine and as a refrigerator.
description: 12 pages, 10 figures
A review of mathematical representations of biomolecules
Creators: name: Nguyen, Duc D
name: Cang, Zixuan
name: Wei, Guo-Wei
Publisher: name: arXiv
Year: 2019
Subjects: subject: Biomolecules (q-bio.BM)
subject: Algebraic Topology (math.AT)
subject: Differential Geometry (math.DG)
subject: FOS: Biological sciences
subject: FOS: Mathematics

description: Recently, machine learning (ML) has established itself in various worldwide benchmarking competitions in computational biology, including Critical Assessment of Structure Prediction (CASP) and Drug Design Data Resource (D3R) Grand Challenges. However, the intricate structural complexity and high ML dimensionality of biomolecular datasets obstruct the efficient application of ML algorithms in the field. In addition to data and algorithm, an efficient ML machinery for biomolecular predictions must include structural representation as an indispensable component. Mathematical representations that simplify the biomolecular structural complexity and reduce ML dimensionality have emerged as a prime winner in D3R Grand Challenges. This review is devoted to the recent advances in developing low-dimensional and scalable mathematical representations of biomolecules in our laboratory. We discuss three classes of mathematical approaches, including algebraic topology, differential geometry, and graph theory. We elucidate how the physical and biological challenges have guided the evolution and development of these mathematical apparatuses for massive and diverse biomolecular data. We focus the performance analysis on the protein-ligand binding predictions in this review although these methods have had tremendous success in many other applications, such as protein classification, virtual screening, and the predictions of solubility, solvation free energy, toxicity, partition coefficient, protein folding stability changes upon mutation, etc.
description: 33 pages, 13 pages, and 4 tables
The 3D genome shapes the regulatory code of developmental genes
Creators: name: Mozziconacci, Julien
name: Merle, Mélody
name: Lesne, Annick
Publisher: name: arXiv
Year: 2019
Subjects: subject: Genomics (q-bio.GN)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: We revisit the notion of gene regulatory code in embryonic development in the light of recent findings about genome spatial organisation. By analogy with the genetic code, we posit that the concept of code can only be used if the corresponding adaptor can clearly be identified. An adaptor is here defined as an intermediary physical entity mediating the correspondence between codewords and objects in a gratuitous and evolvable way. In the context of the gene regulatory code, the encoded objects are the gene expression levels, while the concentrations of specific transcription factors in the cell nucleus provide the codewords. The notion of code is meaningful in the absence of direct physicochemical relationships between the objects and the codewords, when the mediation by an adaptor is required. We propose that a plausible adaptor for this code is the gene domain, that is, the genome segment delimited by topological insulators and comprising the gene and its enhancer regulatory sequences. We review recent evidences, based on genome-wide chromosome conformation capture experiments, showing that preferential contact domains found in metazoan genomes are the physical traces of gene domains. Accordingly, genome 3D folding plays a direct role in shaping the developmental gene regulatory code.
description: Journal of Molecular Biology, Elsevier, 2019
A utility-based analysis of equilibria in multi-objective normal form games
Creators: name: Rădulescu, Roxana
name: Mannion, Patrick
name: Zhang, Yijie
name: Roijers, Diederik M.
name: Nowé, Ann
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Science and Game Theory (cs.GT)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: Multiagent Systems (cs.MA)
subject: FOS: Computer and information sciences

description: In multi-objective multi-agent systems (MOMAS), agents explicitly consider the possible tradeoffs between conflicting objective functions. We argue that compromises between competing objectives in MOMAS should be analysed on the basis of the utility that these compromises have for the users of a system, where an agent's utility function maps their payoff vectors to scalar utility values. This utility-based approach naturally leads to two different optimisation criteria for agents in a MOMAS: expected scalarised returns (ESR) and scalarised expected returns (SER). In this article, we explore the differences between these two criteria using the framework of multi-objective normal form games (MONFGs). We demonstrate that the choice of optimisation criterion (ESR or SER) can radically alter the set of equilibria in a MONFG when non-linear utility functions are used.
description: Under review since 16 January 2020
Influence of Relative Humidity on HEPA Filters During and After Loading with Soot Particles
Creators: name: Godoy, Charlotte
name: Thomas, Dominique
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Space Science
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Marine Biology

description: One of the most frequently used methods to purify air contaminated by particles, in many industrial processes, is filter media. Although the performance of filter media is relatively well documented under standard conditions (humidity and ambient temperature), few studies are interested in the interaction between moisture and the deposition of particles collected. The proposed study aims to establish the performance of a fibrous media with aerosols composed of nanostructured solid particles (soot) and the influence of relative humidity (RH) on its pressure drop. In a first part, the impact of relative humidity on the mass loading capacity of flat HEPA filter with soot particles during clogging is investigated. In a second part, exposure of filters loaded (at 35% RH) with soot particles by a clean air at relative humidity rate between 50 and 90% is tested. The results show a significant decrease of pressure drop for high relative humidity rate. Knowing soot particles are non-hygroscopic and non-hydrophilic, shows an interesting phenomenon, which could be not link to the nature of the particles. A model has be done with the results obtained.
Shifting the consensus on sharing sensitive data
Creators: name: Kapiszewski, Diana
name: Kirilova, Dessislava
name: Page, Christiane
Publisher: name: Zenodo
Year: 2018

description: Researchers who work with human participants face competing mandates. Funding organizations increasingly require applicants to develop data management plans that discuss data sharing. Journals increasingly require that authors make accessible the data underlying articles. Institutional Review Boards (IRBs), in contrast, neither encourage scholars to discuss data sharing with study participants nor discourage the withholding of data. Because funders and publishers often defer to IRB mandates, data generated through interaction with human participants -- including data that could be unproblematically shared -- are often only available to the researcher who collected them. We report on two workshops for IRB personnel (a third is planned for May 2018), and a study we conducted of the guidance offered by 50 IRBs at R1 highest research activity universities. While workshop attendees have been open to the ethical sharing of research data, our initial analysis suggests that IRB guidelines rarely mention data sharing. We also propose guidance and informed consent language that anticipate data sharing, around which we seek to build consensus among IRBs.
Olivewood Ties : חיבור עץ זית / روابط الزيتون
Creators: name: Miller, Samantha
Publisher: name: The University of British Columbia
Year: 2023

description: Past and present peace negotiations have failed to propel Israelis and Palestinians to coexistence and liberation. These nations have conflicting collective narratives that make it challenging to accept the legitimacy of the other’s right to exist. Furthermore, physical barriers to peace, such as the nearly 800-kilometre separation barrier, erode possibilities for interaction and human connection. This academic endeavour challenges the myth that peace and war are binary and cannot exist simultaneously. Upon the acceptance that the consequences of war are sociocultural and spatial, we can begin navigating a spatial strategy for peacebuilding. Both groups share a deep-rooted love and respect for the land they call home or dream of one day returning to. Because of this, these communities have enmeshed realities, and their futures are both tied to each other and the land. Olivewood Ties investigates how landscape can be a peacebuilding mechanism in the divided context of Israel/Palestine. Presently and historically, trees in Israel/Palestine were proxy soldiers, employed in warfighting, land acquisition, and nation-building. If trees and flora were instead proxy peacebuilders, what implications do different landscape design strategies possess and moreover, what opportunities do they offer as a mechanism toward healing and unity? This project aims to reveal the faces of perseverance, the activist groups who unite Israelis and Palestinians, and the trees who bore witness to the tears of suffering and celebration of liberation.
Current developments in access to administrative data for research
Creators: name: Silberman, Roxane
Publisher: name: Zenodo
Year: 2018

description: Mobilizing the resources of administrative data for official statistics, evidence-based policies. and research is at the top of the agenda. In countries where official statistics are largely based on registers with a national statistical institute in a central position, access to these data has been facilitated earlier than in countries more reliant on surveys for official statistics, eventually decentralized in ministries' statistical departments, regions, or federal systems. This paper focuses on the French case, a country where administrative data are held by various government bodies under different legal frameworks. Building on previous developments regarding confidential microdata and the implementation of the Secure Remote Access Centre (CASD), changes in the legal frameworks have opened access for researchers to a large bunch of administrative data. Following changes for tax data (2014) and medico-administrative data (2015), the Digital law (2017) is an interesting attempt to provide a general framework dealing with the obstacle of various implementations of "the professional secrecy". The same law allows merging these data using the national identifier both for the official statistics and the research needs. However, a number of challenges arise: harmonization of procedures and requirements; centralized vs decentralized organisation for secure access facilities; metadata; preservation issues.
The radial part of the zero-mode Hamiltonian for sigma models with group target space
Creators: name: Pickrell, Doug
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 81T40 22E67 58D20

description: We use geometric arguments to derive a possible form for the radial part of the ``zero-mode Hamiltonian'' for the two dimensional sigma model with target space S^3, or more generally a compact simply connected Lie group.
description: AMSTEX, 23 pages
Convergence of Eigenvector Continuation
Creators: name: Sarkar, Avik
name: Lee, Dean
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Theory (nucl-th)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Numerical Analysis (math.NA)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Eigenvector continuation is a computational method that finds the extremal eigenvalues and eigenvectors of a Hamiltonian matrix with one or more control parameters. It does this by projection onto a subspace of eigenvectors corresponding to selected training values of the control parameters. The method has proven to be very efficient and accurate for interpolating and extrapolating eigenvectors. However, almost nothing is known about how the method converges, and its rapid convergence properties have remained mysterious. In this letter we present the first study of the convergence of eigenvector continuation. In order to perform the mathematical analysis, we introduce a new variant of eigenvector continuation that we call vector continuation. We first prove that eigenvector continuation and vector continuation have identical convergence properties and then analyze the convergence of vector continuation. Our analysis shows that, in general, eigenvector continuation converges more rapidly than perturbation theory. The faster convergence is achieved by eliminating a phenomenon that we call differential folding, the interference between non-orthogonal vectors appearing at different orders in perturbation theory. From our analysis we can predict how eigenvector continuation converges both inside and outside the radius of convergence of perturbation theory. While eigenvector continuation is a non-perturbative method, we show that its rate of convergence can be deduced from power series expansions of the eigenvectors. Our results also yield new insights into the nature of divergences in perturbation theory.
description: 5 pages and 4 figures (main text), 4 pages and 8 figures (supplemental), new analysis of the multi-parameter case, new application to BCS-BEC crossover and the unitary limit
Mesoscopic transport in two-dimensional topological insulators
Creators: name: Gusev, G. M.
name: Kvon, Z. D
name: Olshanetsky, E. B.
name: Mikhailov, N. N.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Topological states of matter have attracted a lot of attention due to their many intriguing transport properties. In particular, two-dimensional topological insulators (2D TI) possess gapless counter propagating conducting edge channels, with opposite spin, that are topologically protected from backscattering. Two basic features are supposed to confirm the existence of the ballistic edge channels in the submicrometer limit: the 4-terminal conductance is expected to be quantized at the universal value $2e^{2}/h$, and a nonlocal signal should appear due to a net current along the sample edge, carried by the helical states. On the other hand for longer channels the conductance has been found to deviate from the quantized value. This article reviewer the experimental and theoretical work related to the transport in two-dimensional topological insulators (2D-TI), based on HgTe quantum wells in zero magnetic field. We provide an overview of the basic mechanisms predicting a deviation from the quantized transport due to backscattering (accompanied by spin-flips) between the helical channels. We discuss the details of the model, which takes into account the edge and bulk contribution to the total current and reproduces the experimental results.
description: 13 pages, 12 figures
Integrated approach for the identification of spatial patterns related to renewable energy potential in European territories
Creators: name: Scaramuzzino, Chiara
name: Garegnani, Giulia
name: Zambelli, Pietro
Publisher: name: arXiv
Year: 2019
Subjects: subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: The study presents an effort to classify the territories of a specific area, according to similarities in the estimated potential of their renewable sources, considering also their economic and sociodemographic structure and their geographic features. Specifically, the paper focuses on the area of EU28 and Switzerland and uses as basis for the analysis, data estimating the potential of renewable energy sources collected and elaborated in the framework of the project HotMaps (Horizon 2020). The method used to group the territorial units is cluster analysis, and specifically the k-means algorithm. The data present some interesting patterns and the territories of EU28 and Switzerland at NUTS3 level are classified into 17 clusters. The analysis shows the presence of heterogeneity within national borders and among territories comprised in the macro regions target of specific EU programmes, specifically the Adriatic-Ionian region, the Alpine region, the Baltic Sea region and the Danube region. The results of this research are meant to be used by European policy makers in developing more focused transnational renewable energy policies and strategies.
description: This study was conducted in the frame of the European Union (EU) H2020 project HotMaps (grant number: 723677). HotMaps (www.hotmaps-project.eu) aims at developing "an open source heating/cooling mapping and planning toolbox" for EU28 policy makers at national and local level. This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
Network transferability of adversarial patches in real-time object detection
Creators: name: Bayer, Jens
name: Becker, Stefan
name: Münch, David
name: Arens, Michael
Publisher: name: arXiv
Year: 2024
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Adversarial patches in computer vision can be used, to fool deep neural networks and manipulate their decision-making process. One of the most prominent examples of adversarial patches are evasion attacks for object detectors. By covering parts of objects of interest, these patches suppress the detections and thus make the target object 'invisible' to the object detector. Since these patches are usually optimized on a specific network with a specific train dataset, the transferability across multiple networks and datasets is not given. This paper addresses these issues and investigates the transferability across numerous object detector architectures. Our extensive evaluation across various models on two distinct datasets indicates that patches optimized with larger models provide better network transferability than patches that are optimized with smaller models.
description: 7 pages, 6 figures, 1 table
Privacy and the limits of open data in South Africa
Creators: name: Nobubele Shozi
name: Vahed, Anwar
Publisher: name: Zenodo
Year: 2018

description: Even though open data has a number of benefits, the biggest challenge facing open data is privacy. Opening access to such data involves trading off privacy for utility or vice versa. Releasing the raw data allows for better engagement with the data; however, this creates privacy risks. Protecting the data limits the usefulness of the data. Therefore a balance between privacy and utility must be maintained. It therefore becomes challenging to release data while ensuring that it is useful. This paper aims to understand the limits of open data in terms of privacy. Given national regulatory requirements in South Africa to ensure data privacy such as the Protection of Personal Information (POPI) Act, appropriate measures for mitigating privacy violation are particularly relevant for the Data Intensive Research Initiative of South Africa (DIRISA), a government funded enterprise to manage and provide access to research data repositories. This paper investigates the currently existing South African open data repositories to identify privacy risks that currently exist in terms of the data fields that are released in the datasets. The repositories are aligned towards the POPI act and privacy mitigation techniques to preserve the data while ensuring utility are recommended.
Spin-orbit coupled superconductivity: Rashba-Hubbard model on the square lattice
Creators: name: Wolf, Sebastian
name: Rachel, Stephan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The weak-coupling renormalization group method is an asymptotically exact method to find superconducting instabilities of a lattice model of correlated electrons. Here we extend it to spin-orbit coupled lattice systems and study the emerging superconducting phases of the Rashba-Hubbard model. Since Rashba type spin-orbit coupling breaks inversion symmetry, the arising superconducting phases may be a mixture of spin-singlet and spin-triplet states. We study the two-dimensional square lattice as a paradigm and discuss the symmetry properties of the arising spin-orbit coupled superconducting states including helical spin-triplet superconductivity. We also discuss how to best deal with split energy bands within a method which restricts paired electrons to momenta on the Fermi surface.
description: 15 pages, 12 figures
The velocity dispersion function of early-type galaxies
Creators: name: Sheth, Ravi K.
name: Bernardi, M.
name: Schechter, P. L.
name: Burles, S.
name: Eisenstein, D. J.
name: Finkbeiner, D. P.
name: Frieman, J.
name: Hogg, D. W.
name: Lupton, R. H.
name: Schlegel, D. J.
name: Subbarao, M.
name: Shimasaku, K.
name: Bahcall, N. A.
name: Brinkmann, J.
name: Ivezic, Z.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The distribution of early-type galaxy velocity dispersions, phi(sigma), is measured using a sample drawn from the SDSS database. Its shape differs significantly from that which one obtains by simply using the mean correlation between luminosity, L, and velocity dispersion, sigma, to transform the luminosity function into a velocity function: ignoring the scatter around the mean sigma-L relation is a bad approximation. An estimate of the contribution from late-type galaxies is also made, which suggests that phi(sigma) is dominated by early-type galaxies at velocities larger than ~ 200 km/s.
description: Minor changes, matches version to appear in ApJ, 1 September 2003
New constraints on the structure of the nuclear stellar cluster of the Milky Way from star counts and MIR imaging
Creators: name: Gallego-Cano, E.
name: Schödel, R.
name: Nogueras-Lara, F.
name: Dong, H.
name: Shahzamanian, B.
name: Fritz, T. K.
name: Gallego-Calvente, A. T.
name: Neumayer, N.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The Milky Way nuclear star cluster (MWNSC) is a crucial laboratory for studying the galactic nuclei of other galaxies, but its properties have not been determined unambiguously until now. Aims. We aim to study the size and spatial structure of the MWNSC. Methods. This study uses data and methods that address potential shortcomings of previous studies on the topic. We use $0.2''$ angular resolution $K_{s}$ data to create a stellar density map in the central $86.4$pc x $21$pc at the Galactic center. We include data from selected adaptive-optics-assisted images obtained for the inner parsecs. In addition, we use IRAC/Spitzer mid-infrared (MIR) images. We model the Galactic bulge and the nuclear stellar disk in order to subtract them from the MWNSC. Finally, we fit a Sérsic model to the MWNSC and investigate its symmetry. Results. Our results are consistent with previous work. The MWNSC is flattened with an axis ratio of $q=0.71 \pm0.10$, an effective radius of $R_{e}=(5.1 \pm1.0)$ pc, and a Sérsic index of $n=2.2 \pm0.7$. Its major axis may be tilted out of the Galactic plane by up to $-10$ degrees. The distribution of the giants brighter than the Red Clump (RC) is found to be significantly flatter than the distribution of the faint stars. We investigate the 3D structure of the central stellar cusp using our results on the MWNSC structure on large scales to constrain the deprojection of the measured stellar surface number density, obtaining a value of the 3D inner power law of $γ=1.38\pm0.06_{sys}\pm0.01_{stat}$. Conclusions. The MWNSC shares its main properties with other extragalactic NSCs found in spiral galaxies. The differences in the structure between bright giants and RC stars might be related to the existence of not completely mixed populations of different ages. This may hint at recent growth of the MWNSC through star formation or cluster accretion.
description: 20 pages
Probing the topology of the quantum analog of a classical skyrmion
Creators: name: Sotnikov, O. M.
name: Mazurenko, V. V.
name: Colbois, J.
name: Mila, F.
name: Katsnelson, M. I.
name: Stepanov, E. A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Applied Physics (physics.app-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In magnetism, skyrmions correspond to classical three-dimensional spin textures characterized by a topological invariant that keeps track of the winding of the magnetization in real space, a property that cannot be easily generalized to the quantum case since the orientation of a quantum spin is in general ill-defined. Moreover, as we show, the quantum skyrmion state cannot be directly observed in modern experiments that probe the local magnetization of the system. However, we show that this novel quantum state can still be identified and fully characterized by a special local three-spin correlation function defined on neighbouring lattice sites -- the scalar chirality -- which reduces to the classical topological invariant for large systems, and which is shown to be nearly constant in the quantum skyrmion phase.
description: The paper was partially rewritten. New results on measurements of the quantum skyrmion state with a quantum computer simulator were added
Hubble Space Telescope/WFPC2 Investigation of the Nuclear Morphology in the Toomre Sequence of Merging Galaxies
Creators: name: Laine, Seppo
name: van der Marel, Roeland P.
name: Rossa, Joern
name: Boeker, Torsten
name: Mihos, J. Christopher
name: Hibbard, John E.
name: Zabludoff, Ann I.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report on the properties of nuclear regions in the Toomre Sequence of merging galaxies, based on imaging data gathered with the Hubble Space Telescope WFPC2 camera. We have imaged the 11 systems in the proposed evolutionary merger sequence in the F555W and F814W broad-band filters, and in H-alpha+[NII] narrow-band filters. The broad-band morphology of the nuclear regions varies from non-nucleated starburst clumps through dust-covered nuclei to a nucleated morphology. There is no unambiguous trend in the morphology with merger stage. The emission-line morphology is extended beyond the nucleus in most cases, but centrally concentrated (within 1 kpc) emission-line gas can be seen in the four latest-stage merger systems. We have quantified the intrinsic luminosity densities and colors within the inner 100 pc and 1 kpc of each identified nucleus. We find little evidence for a clear trend in nuclear properties along the merger sequence, other than a suggestive rise in the nuclear luminosity density in the most evolved members of the sequence. The lack of clear trends in nuclear properties is likely due both to the effects of obscuration and geometry, as well as the physical variety of galaxies included in the Toomre Sequence.
description: LaTeX, 24 pages, 21 figures, 2 tables, accepted for publication in The Astronomical Journal, paper with high resolution figures can be accessed at http://www.stsci.edu/~marel/psgzdir/toomreWFPC2.ps.gz
The Ethics and Welfare Implications of Keeping Western European Hedgehogs (erinaceus Europaeus) in Captivity
Creators: name: S.A. Jones
name: Chapman, Stella
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Ecology
subject: FOS: Biological sciences
subject: Cancer
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Patient outcomes for hedgehog (Erinaceus europaeus) casualties are not limited to release versus euthanasia; some hedgehogs have conditions that do not preclude their ability to survive in captivity with human intervention. This research explored the welfare implications and ethical issues of keeping disabled hedgehogs in permanent captivity. Currently, there is very little in the literature and the subject is highly emotive and controversial. A questionnaire was used to assess welfare and these data contrasted with the normal behaviors, environment, and diet of free-living hedgehogs. The most convincing argument for keeping wild animals in captivity is species conservation; however, hedgehogs are not currently listed as endangered. Sixty-six datasets were obtained, representing 194 hedgehogs kept in permanent captivity. Results were mixed, i.e., many respondents providing suitable habitat features (for example, grass and soil 83.3% of respondents, shrubs and/or hedges 69.7% of respondents) observing “positive” behaviors such as foraging for natural foods (69.7% of respondents), and observing appropriate behavioral responses to humans; and some areas for concern, i.e., habitat size (22.7% of respondents reported habitats <10m2), presence of badgers (only 48.5% of respondents reported no badgers in the area), evidence of aggressive behavior (22.7% of respondents had observed non-food-related aggression between hedgehogs) and seven hedgehogs having sustained bite wounds whilst in captivity. The authors are cautious about drawing any definitive conclusions from this research, though it would appear that some of the hedgehogs in the survey had welfare comparable to their free-living counterparts.