cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
(1+1) Genetic Programming With Functionally Complete Instruction Sets Can Evolve Boolean Conjunctions and Disjunctions with Arbitrarily Small Error
Creators: name: Doerr, Benjamin
name: Lissovoi, Andrei
name: Oliveto, Pietro S.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Recently it has been proven that simple GP systems can efficiently evolve a conjunction of $n$ variables if they are equipped with the minimal required components. In this paper, we make a considerable step forward by analysing the behaviour and performance of a GP system for evolving a Boolean conjunction or disjunction of $n$ variables using a complete function set that allows the expression of any Boolean function of up to $n$ variables. First we rigorously prove that a GP system using the complete truth table to evaluate the program quality, and equipped with both the AND and OR operators and positive literals, evolves the exact target function in $O(\ell n \log^2 n)$ iterations in expectation, where $\ell \geq n$ is a limit on the size of any accepted tree. Additionally, we show that when a polynomial sample of possible inputs is used to evaluate the solution quality, conjunctions or disjunctions with any polynomially small generalisation error can be evolved with probability $1 - O(\log^2(n)/n)$. The latter result also holds if GP uses AND, OR and positive and negated literals, thus has the power to express any Boolean function of $n$ distinct variables. To prove our results we introduce a super-multiplicative drift theorem that gives significantly stronger runtime bounds when the expected progress is only slightly super-linear in the distance from the optimum.
description: 18 pages. Substantial text overlap with arXiv:1903.11936
MS Gr. class. c. 2 300
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 307 col. 15. Chrysippus, Quaestiones logicae
Drawing by Carlo Orazi
Prioritizing active transport network investment using locational accessibility
Creators: name: Lahoorpoor, Bahman
name: Wu, Hao
name: Rayaprolu, Hema
name: Levinson, David
Publisher: name: TeMA - Journal of Land Use, Mobility and Environment
Year: 2022

description: This research explores prioritizing network investment to improve walking and biking access in a suburban area with a poorly connected street network. This study's methods provide a systematic approach to design and prioritize the potential links to improve active travel in the suburban environment. An access-oriented ranking system is proposed to prioritize the contribution of links in two evaluation processes for different travel time thresholds. One of the developing suburbs in Sydney is selected as the case study, and a list of potential links is identified. Results indicate that links with the highest added access per unit of cost are the links that have the highest impact if all links are built. However, the locational network structure surrounding the point of interest may affect the order. For a radial network, closer links lead to higher access, while for a tree-like network structure, connecting branches improve access significantly. Also, farther potential links are significantly dependent on the closer links in increasing accessibility for a specific location. This suggests that in order to utilize the network, there should be a sequence in constructing the potential links. The application of access-oriented network investment is also discussed.
description: TeMA - Journal of Land Use, Mobility and Environment, Vol 15 No 2 (2022): The city challenges and external agents. Methods, tools and best practices
Renaturalising lands as an adaptation strategy. Towards an integrated water-based design approach
Creators: name: De Noia, Ilaria
name: Favargiotti, Sara
name: Marzadri, Alessandra
Publisher: name: TeMA - Journal of Land Use, Mobility and Environment
Year: 2022

description: The effects of soil sealing on the hydrological cycle and water resource exploitation are critical issues for the sustainable development of urbanised areas. Cities’ growth without adequate measures for mitigating anthropic impact has led to deep changes in the hydrological balance regime. In a climate change scenario, the expected increase of rainfall results in hydrogeological and contamination issues, with severe impacts on the fragility of many territories such as small mountain cities. In this framework, Nature-based solutions for sustainable urban water management can help to renaturalise lands, restoring ecosystemic functions. The area of Comano Terme in Trentino offers an opportunity to test an integrated water-based design approach to address the climate crisis. It is a fragile territory with many marginal and disconnected water resources: thermal and mineral springs, and River Sarca, strongly exploited for hydropower production. The increase in rainfall and flow releases from the upstream dam cause floods in urban areas, worsened by soil sealing. This experimental study proposes a multidisciplinary and transcalar approach that combines landscape design and hydraulic constructions to renaturalise the territory with Green and Blue Infrastructure. Sustainable urban drainage devices were integrated into a slow mobility system that reconnects the territory and increases urban resilience.
description: TeMA - Journal of Land Use, Mobility and Environment, Vol 15 No 2 (2022): The city challenges and external agents. Methods, tools and best practices
Caroxylon aellenii Mucina 2017, comb. nov.
Creators: name: Mucina, Ladislav
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Caryophyllales
Amaranthaceae
Caroxylon
Caroxylon aellenii

description: 4. Caroxylon aellenii (Botsch.) Mucina comb. nov.
 Basionym: ― Salsola aellenii Botsch. in Botanicheskii Zhurnal 59: 536 (1974c).
 Type: ― SOUTH AFRICA. Cape Prov. [Northern Cape Prov.]: Dist. Calvinia, near Brandvlei, c. 3000 ft elev., 19 November 1946, Acocks 13198 (holotype LE-00011764!; isotype PRE-0375557-0!).
 ‒ Salsola salinissima A.Brückn. & I.Verd., in schedis (Acocks 13198 PRE--0375557!).
 Distribution: ― South Africa (FS, NC): western Free State, Bushmanland.
description: Published as part of Mucina, Ladislav, 2017, Caroxylon (Chenopodiaceae s. str.) in continental southern Africa and Madagascar: a preliminary nomenclatural synopsis and biogeographical considerations, pp. 151-178 in Phytotaxa 312 (2) on page 155, DOI: 10.11646/phytotaxa.312.2.1, http://zenodo.org/record/13701544
Residential development simulation based on learning by agent-based model
Creators: name: Mirzahossein, Hamid
name: Noferesti, Vahid
name: Jin, Xia
Publisher: name: TeMA - Journal of Land Use, Mobility and Environment
Year: 2022

description: Increasing population and desire for urbanization increase housing demand in urban areas and ultimately induce growth and development of residential land-uses that result in urban sprawl. This paper simulates these sprawls of residential land-use in Qazvin city based on learning method by agent-based model. For this purpose, a model with the ability to learn from agents has been developed, in which families as agents can interact with each other and learn based on previous decisions. The model makes it possible to simulate residential land-use conversion based on the agent-based structure over the ten years by applying both demographic changes and household relocation desirability. The multiplication of the average level of land occupation by each family and the number of inserted new families indicates the potential magnitude of land-use changes. Also, results show the priority of residential development locations partially in the northeast regions and a small part of the south of Qazvin. These developments are expected to move towards the east in ten years.
description: TeMA - Journal of Land Use, Mobility and Environment, Vol 15 No 2 (2022): The city challenges and external agents. Methods, tools and best practices
Instability of magnetic skyrmion strings induced by longitudinal spin currents
Creators: name: Okumura, Shun
name: Kravchuk, Volodymyr P.
name: Garst, Markus
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: It is well established that spin-transfer torques exerted by in-plane spin currents give rise to a motion of magnetic skyrmions resulting in a skyrmion Hall effect. In films of finite thickness or in three-dimensional bulk samples the skyrmions extend in the third direction forming a string. We demonstrate that a spin current flowing longitudinally along the skyrmion string instead induces a Goldstone spin wave instability. Our analytical results are confirmed by micromagnetic simulations of both a single string as well as string lattices suggesting that the instability eventually breaks the strings. A longitudinal current is thus able to melt the skyrmion string lattice via a dynamical phase transition. For films of finite thickness or in the presence of disorder a threshold current will be required, and we estimate the latter assuming weak collective pinning.
description: 10 pages, 7 figures
Combining resources and conversion factors
Creators: name: Azmoodeh, Mohammad
name: Haghighi, Farshidreza
name: Motieyan, Hamid
Publisher: name: TeMA - Journal of Land Use, Mobility and Environment
Year: 2022

description: A growing body of recent studies involves the social effects of distributive justice in the field of transportation, which mostly can be traced back to the studies of spatial mismatches, income, or gender inequality. So, this paper seeks to address challenges related to the conceptualization of capability and proposes a new aggregated framework to draw the connection between Resources, Conversion Factors, and Capabilities as the key terms of the Capability Approach. Consequently, by classifying the resources and conversion factors to "individual characteristics," "transportation options," and "urban living environment" dimensions, the model would provide an index that expresses the level of capabilities called the Capability Index (CI). The results of scenarios evaluated in this paper demonstrate that the significant difference in the capabilities is mainly affected by car ownership and income variables with 2.214 and 0.223 Cohen's d effect size, respectively. Also, disability in the young age group causes a more significant reduction in their capability index than their old counterparts. The model demonstrates the need to highlight the capability notion and the need for improving new methods to underscore human characteristics as the focal point in urban policy-making.
description: TeMA - Journal of Land Use, Mobility and Environment, Vol 15 No 2 (2022): The city challenges and external agents. Methods, tools and best practices
Flat-space Quantum Gravity in AdS/CFT
Creators: name: Nomura, Yasunori
name: Sanches, Fabio
name: Weinberg, Sean J.
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Motivated by the task of understanding microscopic dynamics of an evolving black hole, we present a scheme describing gauge-fixed continuous time evolution of quantum gravitational processes in asymptotically flat spacetime using the algebra of CFT operators. This allows us to study the microscopic dynamics of the Hawking emission process, although obtaining a full S-matrix may require a modification of the minimal scheme. The role of the operator product expansion is to physically interpret the resulting time evolution by decomposing the Hilbert space of the states for the entire system into those for smaller subsystems. We translate the picture of an evaporating black hole previously proposed by the authors into predictions for nonperturbative properties of the CFTs that have weakly coupled dual gravitational descriptions. We also discuss a possible relationship between the present scheme and a reference frame change in the bulk.
description: 31 pages, 2 figures; clarifications added
Caroxylon albisepalum Mucina 2017, comb. nov.
Creators: name: Mucina, Ladislav
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Caryophyllales
Amaranthaceae
Caroxylon
Caroxylon albisepalum

description: 6. Caroxylon albisepalum (Aellen) Mucina comb. nov.
 Basionym: ― Salsola albisepala Aellen in Mitt. Bot. Staatssamml. München 4: 23 (1961).
 Type: ― SOUTH-WEST AFRICA [NAMIBIA]. Gibeon: Haribes, sehr verbreitet auf Brackflächen südlich des Hauses, 2 April 1956, Volk 12053 (holotype M-0107441!; isotype LE-00011795!).
 Distribution: ― Namibia: Gibeon District.
description: Published as part of Mucina, Ladislav, 2017, Caroxylon (Chenopodiaceae s. str.) in continental southern Africa and Madagascar: a preliminary nomenclatural synopsis and biogeographical considerations, pp. 151-178 in Phytotaxa 312 (2) on page 156, DOI: 10.11646/phytotaxa.312.2.1, http://zenodo.org/record/13701544
DNA supercoiling in bacteria: state of play and challenges from a viewpoint of physics based modeling
Creators: name: Junier, Ivan
name: Ghobadpour, Elham
name: Espeli, Olivier
name: Everaers, Ralf
Publisher: name: arXiv
Year: 2023
Subjects: subject: Biomolecules (q-bio.BM)
subject: Biological Physics (physics.bio-ph)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: DNA supercoiling is central to many fundamental processes of living organisms. Its average level along the chromosome and over time reflects the dynamic equilibrium of opposite activities of topoisomerases, which are required to relax mechanical stresses that are inevitably produced during DNA replication and gene transcription. Supercoiling affects all scales of the spatio-temporal organization of bacterial DNA, from the base pair to the large scale chromosome conformation. Highlighted in vitro and in vivo in the 1960s and 1970s, respectively, the first physical models were proposed concomitantly in order to predict the deformation properties of the double helix. About fifteen years later, polymer physics models demonstrated on larger scales the plectonemic nature and the tree-like organization of supercoiled DNA. Since then, many works have tried to establish a better understanding of the multiple structuring and physiological properties of bacterial DNA in thermodynamic equilibrium and far from equilibrium. The purpose of this essay is to address upcoming challenges by thoroughly exploring the relevance, predictive capacity, and limitations of current physical models, with a specific focus on structural properties beyond the scale of the double helix. We discuss more particularly the problem of DNA conformations, the interplay between DNA supercoiling with gene transcription and DNA replication, its role on nucleoid formation and, finally, the problem of scaling up models. Our primary objective is to foster increased collaboration between physicists and biologists. To achieve this, we have reduced the respective jargon to a minimum and we provide some explanatory background material for the two communities.
description: 11 figures
The Structural Plan’s sustainability in coastal areas. A case study in the Tyrrhenian coast of Calabria
Creators: name: Chieffallo, Lucia
name: Palermo, Annunziata
name: Viapiana, Maria Francesca
Publisher: name: TeMA - Journal of Land Use, Mobility and Environment
Year: 2022

description: Sustainable planning in coastal areas must integrate environmental protection actions and development actions addressing settlement policies and the location of functional and tourist infrastructure and services that are particularly relevant from a socio-economic point of view. In Italy, coastal planning is fragmented between state, regional and municipal competences. All Italian municipalities have the task of drafting the plan that outlines the strategic scenarios and the structural choices for the governance of the territory under their jurisdiction. We therefore wonder how this general plan can incorporate the specificities of coastal territories starting from the elaboration of the knowledge framework to define a sustainable plan project. To answer this question, we focus on the Calabrian regional territory, which hosts 10% of the national coastal heritage. The paper presents and discusses the procedural and content aspects related to the elaboration of the Preliminary Document of the Structural Plan of a municipality located on the coast of the Tyrrhenian Sea to draw general conclusions from the local experience useful for planners.
description: TeMA - Journal of Land Use, Mobility and Environment, Vol 15 No 2 (2022): The city challenges and external agents. Methods, tools and best practices
Photometric metallicity map of the Large Magellanic Cloud
Creators: name: Choudhury, Samyaday
name: Subramaniam, Annapurni
name: Cole, Andrew A.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We have estimated a metallicity map of the Large Magellanic Cloud (LMC) using the Magellanic Cloud Photometric Survey (MCPS) and Optical Gravitational Lensing Experiment (OGLE III) photometric data. This is a first of its kind map of metallicity up to a radius of 4 - 5 degrees, derived using photometric data and calibrated using spectroscopic data of Red Giant Branch (RGB) stars. We identify the RGB in the V, (V$-$I) colour magnitude diagrams of small subregions of varying sizes in both data sets. We use the slope of the RGB as an indicator of the average metallicity of a subregion, and calibrate the RGB slope to metallicity using spectroscopic data for field and cluster red giants in selected subregions. The average metallicity of the LMC is found to be [Fe/H] = $-$0.37 dex ($σ$[Fe/H] = 0.12) from MCPS data, and [Fe/H] = $-$0.39 dex ($σ$[Fe/H] = 0.10) from OGLE III data. The bar is found be the most metal-rich region of the LMC. Both the data sets suggest a shallow radial metallicity gradient up to a radius of 4 kpc ($-$0.049$\pm$0.002 dex kpc$^{-1}$ to $-$0.066$\pm$0.006 dex kpc$^{-1}$). Subregions in which the mean metallicity differs from the surrounding areas do not appear to correlate with previously known features; spectroscopic studies are required in order to assess their physical significance.
description: 28 pages, 40 figures, 7 tables, Accepted for publication in MNRAS. arXiv admin note: text overlap with arXiv:1101.1771, arXiv:1302.6211 by other authors
Youth urban mobility behaviours in Tunisian Sahel
Creators: name: Ghédira, Aymen
name: El Kébir, Mehdi
Publisher: name: TeMA - Journal of Land Use, Mobility and Environment
Year: 2022

description: In this paper, we analyze a 2019 survey data in order to gain a better understanding of the urban mobility behaviours of Tunisian young people aged from 15 to 29 years old, in the Tunisian Sahel region. For this study, we selected 739 participants, scattered over 40 delegations each with a different structure. We distinguish two age groups: from 15 to 19 years old (31.8%) and 20 to 29 (68.2%). The descriptive analysis was conducted on two spatial scales: The region named also the great Tunisian Sahel (scale 1) formed by three costal governorates (scale 2): Sousse, Monastir, and Mahdia. The variables analysis falls into two main categories: "daily trips volume coupled to the modal choice”, and “the trip trinomial”: Distance, Time, and Costs. Significant differences have been found in mobility practices, not only between social and spatial levels, but also between the youngest of 15-19 years old and those of 20-29 years old, thus emphasizing trends in travel habits as a function of age.
description: TeMA - Journal of Land Use, Mobility and Environment, Vol 15 No 2 (2022): The city challenges and external agents. Methods, tools and best practices
Caroxylon apterygeum Mucina 2017, comb. nov.
Creators: name: Mucina, Ladislav
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Caryophyllales
Amaranthaceae
Caroxylon
Caroxylon apterygeum

description: 10. Caroxylon apterygeum (Botsch.) Mucina comb. nov.
 Basionym: ― Salsola apterygea Botsch. in Botanicheskii Zhurnal 58: 817 (1973).
 Type: ― SOUTH AFRICA. Cape Prov. [Northern Cape Prov.]: Dist. Williston, 3 miles west of Williston, 15 December 1953, Theron 1645 (holotype K-000243948!; isotypes LE-00011775!, PRE-0375560-0!).
 Distribution: ― South Africa (NC): Upper Karoo, Bushmanland.
description: Published as part of Mucina, Ladislav, 2017, Caroxylon (Chenopodiaceae s. str.) in continental southern Africa and Madagascar: a preliminary nomenclatural synopsis and biogeographical considerations, pp. 151-178 in Phytotaxa 312 (2) on page 157, DOI: 10.11646/phytotaxa.312.2.1, http://zenodo.org/record/13701544
Information Needs of Users of the American Indian Center at the University of North Carolina at Chapel Hill
Creators: name: Davis-Castro, Carla
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2014
Subjects: Information-seeking behavior
Libraries & Indians
Cultural maintenance

description: The University of North Carolina at Chapel Hill's (UNC) American Indian Center (AIC) serves the campus community, the Native peoples of the state, and the southeastern region of the United States. The purpose of this study was to better understand users' information needs using primarily qualitative methods. A survey was used to understand how users interact with the college culture center. Data about user information needs was collected via questionnaire using the online survey tool Qualtrics.
This study will be of practical use to the AIC staff in helping them to understand users' information needs, including which needs are being met and which are not. This study gathered evidence of the value that the AIC adds to UNC and adds to the sparse literature regarding university culture centers.
Antiferromagnetic nuclear spin helix and topological superconductivity in $^{13}$C nanotubes
Creators: name: Hsu, Chen-Hsuan
name: Stano, Peter
name: Klinovaja, Jelena
name: Loss, Daniel
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction arising from the hyperfine coupling between localized nuclear spins and conduction electrons in interacting $^{13}$C carbon nanotubes. Using the Luttinger liquid formalism, we show that the RKKY interaction is sublattice dependent, consistent with the spin susceptibility calculation in noninteracting carbon nanotubes, and it leads to an antiferromagnetic nuclear spin helix in finite-size systems. The transition temperature reaches up to tens of mK, due to a strong boost by a positive feedback through the Overhauser field from ordered nuclear spins. Similar to GaAs nanowires, the formation of the helical nuclear spin order gaps out half of the conduction electrons, and is therefore observable as a reduction of conductance by a factor of 2 in a transport experiment. The nuclear spin helix leads to a density wave combining spin and charge degrees of freedom in the electron subsystem, resulting in synthetic spin-orbit interaction, which induces non-trivial topological phases. As a result, topological superconductivity with Majorana fermion bound states can be realized in the system in the presence of proximity-induced superconductivity without the need of fine tuning the chemical potential. We present the phase diagram as a function of system parameters, including the pairing gaps, the gap due to the nuclear spin helix, and the Zeeman field perpendicular to the helical plane.
description: 22 pages, 10 figures, revised version accepted for publication in Phys. Rev. B
Two-beam laser photon merging
Creators: name: Sundqvist, Chantal
name: Karbstein, Felix
Publisher: name: arXiv
Year: 2023
Subjects: subject: Optics (physics.optics)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Quasi-elastic scattering processes have long been thought of providing the most promising signal for a first experimental detection of quantum vacuum nonlinearity. A prominent example of such a process is vacuum birefringence. However, these signals are typically strongly background dominated. This problem can be circumvented by inelastic scattering processes. In this study, we investigate the inelastic process of laser photon merging in the collision of just two laser pulses under a finite angle, which provides signal photons of a distinct frequency outside the frequency spectrum of the background. As a key result, for the example of two laser beams of the same oscillation frequency we demonstrate that by using high-intensity optical lasers and choosing an optimal collision angle, photon merging should become accessible in experiment with state-of-the-art technology. In this case three frequency $ω$ laser photons are merged to a single $3ω$ photon.
description: 21 pages, 5 figures
Indiana House Bill 1402 (2011) and Its Impact on Access to Higher Education: Using Testimonios to Highlight the Lived Experiences of Undocumented Students
Creators: name: Berrios Chavarria, Cesar
Publisher: name: Unknown
Year: 2023
Subjects: subject: Indiana House Bill 1402 (2011)
subject: LatCrit
subject: Undocumented students
subject: Latinx
subject: Latin Americans
subject: Access to higher education
subject: Immigration policies
subject: Testimonios
subject: Indiana House Bill 1402 (2011)
subject: Testimonios
subject: LatCrit
subject: Undocumented
subject: Latinx
subject: Higher education
subject: qualitative research
subject: Post-secondary education
subject: Student advocacy
subject: Policy change
subject: Hope
subject: College choice process

description: Indiana House Bill 1402 (2011) is legislation that prevents undocumented students from receiving the in-state tuition rate. The study focuses on the impact that Indiana House Bill 1402 (2011) has had on undocumented Latinx students as they navigate through the college choice process and attempt to access higher education in Indiana. The purpose of this study is to highlight the ways in which the legislation negatively impacts undocumented students each year as they attempt to further their education beyond high school. Through qualitative research, LatCrit as the theoretical framework, and Testimonios as the methodological approach, two individuals were interviewed and provided with an opportunity to share their lived experiences, their story, and how Indiana House Bill has impacted their life. The study found not only the challenges and barriers that undocumented students face when trying to access post-secondary education, but also the need for undocumented student advocates, policy change, and hope.
AGN Broad Line Regions Scale with Bolometric Luminosity
Creators: name: Trippe, Sascha
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The masses of supermassive black holes in active galactic nuclei (AGN) can be derived spectroscopically via virial mass estimators based on selected broad optical/ultraviolet emission lines. These estimates commonly use the line width as a proxy for the gas speed and the monochromatic continuum luminosity as a proxy for the radius of the broad line region. However, if the size of the broad line region scales with bolometric rather than monochromatic AGN luminosity, mass estimates based on different emission lines will show a systematic discrepancy which is a function of the color of the AGN continuum. This has actually been observed in mass estimates based on H-alpha / H-beta and C IV lines, indicating that AGN broad line regions indeed scale with bolometric luminosity. Given that this effect seems to have been overlooked as yet, currently used single-epoch mass estimates are likely to be biased.
description: 4 pages, no figures/tables. JKAS Rapid Communication, in press (submitted: 2015 May 28; accepted: 2015 June 15)
Deep trip generation with graph neural networks for bike sharing system expansion
Creators: name: Liang, Yuebing
name: Ding, Fangyi
name: Huang, Guan
name: Zhao, Zhan
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Bike sharing is emerging globally as an active, convenient, and sustainable mode of transportation. To plan successful bike-sharing systems (BSSs), many cities start from a small-scale pilot and gradually expand the system to cover more areas. For station-based BSSs, this means planning new stations based on existing ones over time, which requires prediction of the number of trips generated by these new stations across the whole system. Previous studies typically rely on relatively simple regression or machine learning models, which are limited in capturing complex spatial relationships. Despite the growing literature in deep learning methods for travel demand prediction, they are mostly developed for short-term prediction based on time series data, assuming no structural changes to the system. In this study, we focus on the trip generation problem for BSS expansion, and propose a graph neural network (GNN) approach to predicting the station-level demand based on multi-source urban built environment data. Specifically, it constructs multiple localized graphs centered on each target station and uses attention mechanisms to learn the correlation weights between stations. We further illustrate that the proposed approach can be regarded as a generalized spatial regression model, indicating the commonalities between spatial regression and GNNs. The model is evaluated based on realistic experiments using multi-year BSS data from New York City, and the results validate the superior performance of our approach compared to existing methods. We also demonstrate the interpretability of the model for uncovering the effects of built environment features and spatial interactions between stations, which can provide strategic guidance for BSS station location selection and capacity planning.
Symmetry analysis of light-induced magnetic interactions via Floquet engineering
Creators: name: Yambe, Ryota
name: Hayami, Satoru
Publisher: name: arXiv
Year: 2023
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Anisotropic magnetic interactions become the origins of intriguing magnetic structures, such as helical and skyrmion structures by the Dzyaloshinskii-Moriya interaction. In general, possible anisotropic exchange interactions are restricted by crystal symmetry. Meanwhile, by lowering the crystal symmetry with light, additional anisotropic magnetic interactions are expected according to its polarization and frequency. In this study, we clarify a relationship between anisotropic magnetic interactions and symmetry lowering in insulating magnets irradiated by light. Based on the Floquet formalism, we find that a variety of anisotropic two-spin and three-spin interactions are induced via spin-dependent electric polarizations activated by light irrespective of the presence/absence of the spatial inversion symmetry; we systematically classify them in the hexagonal point group, tetragonal point group, and their subgroups. Our symmetry analyses show that the light-induced two-spin (three-spin) interaction is owing to the reduction of the point group to a chiral point group (black and white magnetic point group). We also demonstrate the effect of the light-induced magnetic interactions on the magnetic structures in a triangular unit. Our results will be a symmetry-based reference for the Floquet engineering of magnetic structures.
description: 15 pages, 8 figures, 7 tables
Cauchy-horizon singularity inside perturbed Kerr black holes
Creators: name: Burko, Lior M.
name: Khanna, Gaurav
name: Zenginoǧlu, Anıl
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The Cauchy horizon inside a perturbed Kerr black hole develops an instability that transforms it into a curvature singularity. We solve for the linearized Weyl scalars $ψ_0$ and $ψ_4$ and for the curvature scalar $R_{αβγδ}R^{αβγδ}$ along outgoing null rays approaching the Cauchy horizon in the interior of perturbed Kerr black holes using the Teukolsky equation, and compare our results with those found in perturbation analysis. Our results corroborate the previous perturbation analysis result that at its early parts the Cauchy horizon evolves into a deformationally-weak, null, scalar-curvature singularity. We find excellent agreement for $ψ_0(u={\rm const},v)$, where $u,v$ are advanced and retarded times, respectively. We do find, however, that the exponential growth rate of $R_{αβγδ}R^{αβγδ}(u={\rm const},v)$ approaching the singularity is dramatically slower than that found in perturbation analysis, and that the angular frequency is in excellent agreement.
description: 5 pages, 6 figures in main paper. A 3 page erratum (to be published in PRD) with 3 figures and a corrected table appended. We report in the erratum that we find also the magnitude of $psi_4$ and of the curvature scalar $K$ to agree with perturbation analysis
Control vs Freedom: How Companies Govern Their Open Source Software Contributions
Creators: name: Wissel, Juliane
name: Zaggl, Michael
name: Lindberg, Aron
Publisher: name: figshare
Year: 2022
Subjects: subject: 150301 Business Information Management (incl. Records, Knowledge and Information Management, and Intelligence)
subject: FOS: Economics and business
subject: 150302 Business Information Systems
subject: 150307 Innovation and Technology Management
subject: 150501 Consumer-Oriented Product or Service Development

description: Companies are increasingly involving themselves with open source software (OSS) communities. We lack knowledge about how companies ensure a compliant behavior, while granting a certain degree of flexibility to their employees in managing their OSS contributions. We approach this gap in an explorative case study at Siemens AG through the following question: How do companies negotiate the tensions between control and flexibility regarding their employees’ community interaction by means of governance mechanisms? Initial results show that Siemens introduced a formal template process, which the different organizational units within Siemens can adapt according to their needs. The extent to which the process is implemented depends on the level of closeness to core intellectual property of the organizational unit and the intensity of the involvement in OSS communities. Developers use several methods to shorten the process. Our study contributes to the literature on company-involved OSS development and the OSS governance literature.
A Machine Learning Approach Based on Range Corrected Deep Potential Model for Efficient Vibrational Frequency Computation
Creators: name: Yang, Jitai
name: Cong, Yang
name: Li, You
name: Li, Hui
Publisher: name: arXiv
Year: 2023
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: As an ensemble average result, vibrational spectrum simulation can be time-consuming with high accuracy methods. We present a machine learning approach based on the range-corrected deep potential (DPRc) model to improve computing efficiency. DPRc method divides the system into ``probe region'' and ``solvent region''; ``solvent-solvent'' interactions are not counted in the neural network. We applied the approach to two systems: formic acid \ch{C=O} stretching and MeCN \ch{C+N} stretching vibrational frequency shifts in water. All data sets were prepared using Quantum Vibration Perturbation (QVP) approach. Effects of different region divisions, one-body correction, cut-range, and training data size were tested. The model with a single molecule ``probe region'' showed stable accuracy; it ran roughly ten times faster than regular DP and reduced the training time by about four. The approach is efficient, easy to apply, and extendable to calculating various spectra.
An Extreme-AO Search for Giant Planets around a White Dwarf --VLT/SPHERE performance on a faint target GD 50
Creators: name: Xu, S.
name: Ertel, S.
name: Wahhaj, Z.
name: Milli, J.
name: Scicluna, P.
name: Bertrang, G. H. -M.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: CONTEXT. Little is known about the planetary systems around single white dwarfs although there is strong evidence that they do exist. AIMS. We performed a pilot study with the extreme-AO system on the Spectro-Polarimetric High-contrast Exoplanet REsearch (SPHERE) on the Very Large Telescopes (VLT) to look for giant planets around a young white dwarf, GD 50. METHODS. We were awarded science verification time on the new ESO instrument SPHERE. Observations were made with the InfraRed Dual-band Imager and Spectrograph in classical imaging mode in H band. RESULTS. Despite the faintness of the target (14.2 mag in R band), the AO loop was closed and a strehl of 37\% was reached in H band. No objects were detected around GD 50. We achieved a 5-sigma contrast of 6.2, 8.0 and 8.25 mags at 0{\farcs}2, 0{\farcs}4 and 0{\farcs}6 and beyond, respectively. We exclude any substellar objects more massive than 4.0 M$_\textrm{J}$ at 6.2 AU, 2.9 M$_\textrm{J}$ at 12.4 AU and 2.8 M$_\textrm{J}$ at 18.6 AU and beyond. This rivals the previous upper limit set by Spitzer. We further show that SPHERE is the most promising instrument available to search for close-in substellar objects around nearby white dwarfs.
description: A&A letters, accepted
Caroxylon armatum Mucina 2017, comb. nov.
Creators: name: Mucina, Ladislav
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Caryophyllales
Amaranthaceae
Caroxylon
Caroxylon armatum

description: 13. Caroxylon armatum (C.A.Sm. ex Aellen) Mucina comb. nov.
 Basionym: ― Salsola armata C.A.Sm. ex Aellen in Mittt. Bot. Staatssamml. München 4: 127 (1961).
 Type: ― SOUTH-WEST AFRICA [NAMIBIA]. Keetmanshoop: Klein-Karas, 14 November 1923, Dinter 5094 (syntypes HBG-503727!, K-001089676!, K-001089677!, M-0110650!, PRE0370767 -0!, LE-00011779!, PRE-0457006-0!; PRE-0659516-0!; PRE-0659517- 0!; NBG-SAM0071420-0!, S-G-7071!, Z-000002791!, Z-000002792!).
 ‒ Salsola armata C.A.Sm. ex Ulbr. in Engl. & Prantl in Natürl. Pflanzenfam., ed. 2, 16c: 566 (1934), nom. nud. (Art. 38.1a of ICN).
 ‒ Salsola calluna Schinz in Bull. Herb. Boiss. 5, App. 3: 62 (1897), nom. nud. (Art. 38.1a of ICN).
 ‒ Salsola engleri Ulbr. in Engl. & Prantl in Natürl. Pflanzenfam., ed. 2, 16c: 566 (1934), nom. nud. (Art. 38.1a of ICN).
 ‒ Salsola minutiflora C.A.Sm. ex Ulbr. in Engl. & Prantl in Natürl. Pflanzenfam., ed. 2, 16c: 566 (1934), nom. nud. (Art. 38.1a of ICN).
 Notes: ― The taxonomic significance of the voucher ‘ South-West Africa [Namibia], Seeheim, 750 m elev.., 28 April 1903, Engler 6609a (K-000243969!; see http://plants.jstor.org; scan filed under S. armata)’ is controversial. There are two identifications available on the sheet of this voucher (S. minutiflora, C.A. Smith, Oct 1928; S. armata, Botschantzev, 5 March 1971). A note on the herbarium sheet reads ‘portion of the type specimen’, however this is obviously an error since the type of S. armata is Dinter 5094 (see above).
 Distribution: ― Namibia: Keetmanshoop and Helmeringshausen Districts, Sperrgebiet; South Africa (NC): Bushmanland.
description: Published as part of Mucina, Ladislav, 2017, Caroxylon (Chenopodiaceae s. str.) in continental southern Africa and Madagascar: a preliminary nomenclatural synopsis and biogeographical considerations, pp. 151-178 in Phytotaxa 312 (2) on page 157, DOI: 10.11646/phytotaxa.312.2.1, http://zenodo.org/record/13701544
MS Gr. class. c. 2 305
Creators: name: Oxyrhynchus Papyri
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 327 fr. 1 fr. 5. Philodemus, Philosophorum historia
Drawing by Giuseppe (?) Casanova
Spin-polarized electron beam generation in the colliding-pulse injection scheme
Creators: name: Gong, Zheng
name: Quin, Michael J.
name: Bohlen, Simon
name: Keitel, Christoph H.
name: Põder, Kristjan
name: Tamburini, Matteo
Publisher: name: arXiv
Year: 2023
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: Applied Physics (physics.app-ph)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Employing colliding-pulse injection has been shown to enable high-quality electron beams to be generated from laser-plasma accelerators. Here by leveraging test particle simulations, Hamiltonian analysis, and multidimensional particle-in-cell (PIC) simulations, we lay the theoretical framework of spin-polarized electron beam generation in the colliding-pulse injection scheme. Furthermore, we show that this scheme enables the production of quasi-monoenergetic electron beams in excess of 80\% polarization and tens pC charge with commercial 10-TW-class laser systems.
description: 11 pages, 10 figures
Radial constraints on the Initial Mass Function from TiO features and Wing-Ford band in Early-type Galaxies
Creators: name: La Barbera, F.
name: Vazdekis, A.
name: Ferreras, I.
name: Pasquali, A.
name: Cappellari, M.
name: Martin-Navarro, I.
name: Scoenebeck, F.
name: Falcon-Barroso, J.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: At present, the main challenge to the interpretation of variations in gravity-sensitive line strengths as driven by a non-universal initial mass function (IMF), lies in understanding the effect of other parameters describing unresolved stellar populations, such as elemental abundance ratios. We combine various TiO-based, IMF-sensitive indicators in the optical and NIR spectral windows, along with the FeH-based Wing-Ford band to break this degeneracy. We obtain a significant radial trend of the IMF slope in XSG1, a massive early-type galaxy (ETG), with velocity dispersion sigma~300km/s, observed with the VLT/X-SHOOTER instrument. In addition, we constrain both the shape and normalization of the IMF based only on a stellar population analysis. We robustly rule out a single power-law to describe the IMF, whereas a power law tapered off to a constant value at low masses (defined as a bimodal IMF) is consistent with all the observational spectroscopic data and with the stellar M/L constraints based on the Jeans Anisotropic Modelling method. The IMF in XSG1 is bottom-heavy in the central regions (corresponding to a bimodal IMF slope Gb~3, or a mass normalization mismatch parameter alpha~2), changing towards a standard Milky-Way like IMF (Gb~1.3; alpha~1) around half of the effective radius. This result, combined with previous observations of local IMF variations in massive ETGs, reflects the varying processes underlying the formation of this type of galaxies, between the central core and the outer regions.
description: 24pages, 16 figures, accepted for publication in MNRAS
Caroxylon aroabicum Mucina 2017, comb. nov.
Creators: name: Mucina, Ladislav
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Caryophyllales
Amaranthaceae
Caroxylon
Caroxylon aroabicum

description: 14. Caroxylon aroabicum (Botsch.) Mucina comb. nov.
 Basionym: ― Salsola aroabica Botsch. in Botanicheskii Zhurnal 58: 818 (1973).
 Type: ― SOUTH-WEST AFRICA [NAMIBIA]. Distr. Aroab: 5 miles NE of Koes, 3100 ft elev., 25 November 1949, Codd 5889 (holotype K-000243946!; isotype PRE-0375568-0!).
 Distribution: ― Namibia: Districts of Aroab, Gibeon and Rehoboth.
description: Published as part of Mucina, Ladislav, 2017, Caroxylon (Chenopodiaceae s. str.) in continental southern Africa and Madagascar: a preliminary nomenclatural synopsis and biogeographical considerations, pp. 151-178 in Phytotaxa 312 (2) on page 158, DOI: 10.11646/phytotaxa.312.2.1, http://zenodo.org/record/13701544
Arctic Corridors and Northern Voices: Governing marine transportation in the Canadian Arctic (Salluit, Quebec community report)
Creators: name: Greydanus, Kayla
name: Provencher, Jennifer
name: Carter, Natalie Ann
name: Dawson, Jackie
name: Kochanowicz, Zuzanna
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2018
Subjects: Low impact shipping corridors
Inuit perspectives
Marine transportation governance
Culturally significant marine areas
Arctic shipping impact

description: Ship traffic in the Canadian Arctic nearly tripled between 1990 and 2015. During this time, there has been an increase in ship traffic in the Hudson Strait region. The community of Salluit experiences shipping near the community due to vessels delivering goods; as in many other northern towns, but has additional experience with shipping due to local mining activities. Shipping activities associated with the nearby mines in Deception Bay, located approximately 54 km to the east of Salluit, dates back to the 1960s, with regular production at the mine site starting in 1997 and ongoing today. Thus, the community of Salluit has experience with marine vessel traffic, the local impacts from vessels, and negotiating conditions for vessel travel (i.e. limitations to icebreaking during certain seasons). The Government of Canada is developing a network of low-impact marine transportation corridors in the Arctic that encourages marine transportation traffic to use routes that pose less risk and minimize the impact on communities and the environment. The Low Impact Shipping Corridors will be a framework to guide future federal investments to support marine navigation safety in the North, including improved charting and increased hydrography in partnership with Northerners. The corridors initiative is co-led by the Canadian Coast Guard, Transport Canada, and Canadian Hydrographic Service. Key considerations in the current prioritization of the Low Impact Shipping Corridors include identification of Inuit and Northerners’ perspectives on 1) the potential impact of marine vessels on marine areas used for cultural and livelihood activities and on community members and 2) potential management strategies for the corridors. This report reflects opinions gathered through participatory mapping, focus group discussions, and interviews with Salluit community members who were identified by local organizations as key knowledge holders.