cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
interTwin D4.2 First Architecture design of the DTs capabilities for High Energy Physics, Radio astronomy and Gravitational-wave Astrophysics
Creators: name: Andrea Manzi
name: Levente Farkas
name: Kalliopi Tsolaki
name: Sofia Vallecorsa
name: Sara Vallero
name: Massimiliano Razzano
name: Javad Komijani
name: Yurii Pidopryhora
name: Isabel Campos
Publisher: name: Zenodo
Year: 2023
Subjects: subject: Architecture
subject: FOS: Civil engineering
subject: design
subject: capabilities
subject: Digital Twin Engine
subject: High Energy Physics
subject: GW Astrophysics
subject: Radio Astronomy

description: This deliverable describes the capabilities that the architecture design of a Digital Twin Engine (DTE) has to provide in order to be able to support the use cases coming from the High Energy Physics, Radio Astronomy and GW Astrophysics and the implementation of the related DT Applications. It details the functional specifications and requirements analysis for these use cases. Finally, it provides insights into the architecture design decisions made when developing the blueprint architecture of the DTE to specifically address the needs of the use cases.
Exploring quantum paths on rhythmspaces
Creators: name: Aguado Yáñez, Maria
Publisher: name: Zenodo
Year: 2024
Subjects: Quantum Computer Music
Quantum Computing
Rhythmspaces

description: Continuing the pioneering work in the novel field of Quantum Computer Music, this thesis aims to sonify quantum random walks as rhythmic sequences using the Rhythmspaces software, a 2D visual interactive tool for rhythm generation and exploration.

The methodology includes three stages: The first stage involves designing quantum computing algorithms and mapping the qubit space to the rhythmspace. The second stage focuses on generating and visualizing quantum walks on a pixel interface, adding potentials to bias the walks, and introducing more complex shapes and trajectories. The third stage addresses the sonification of these generated paths by generating MIDI drum pattern messages and sending them to a DAW.This tool serves as a proof of concept for scalable quantum computing algorithm design in audio processing and music applications, illustrating the mutual benefits of interdisciplinary approaches in art and science.
Spatially-Resolved Medium Resolution Spectroscopy of an Interacting E+A (post-starburst) System with the Subaru telescope
Creators: name: Goto, Tomotsugu
name: Yagi, Masafumi
name: Yamauchi, Chisato
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have performed a spatially-resolved medium resolution long-slit spectroscopy of a nearby E+A (post-starburst) galaxy system, SDSSJ161330.18+510335.5. This E+A galaxy has an obvious companion galaxy 14kpc in front with the velocity difference of 61.8 km/s. Both galaxies have obviously disturbed morphology We have found that H$δ$ equivalent width (EW) of the E+A galaxy is greater than 7Ågalaxy wide (8.5 kpc). The E+A galaxy have a weak [OIII] emission (EW$\sim$1Å) by $\sim$2.6 kpc offset from the peak of the Balmer absorption lines. We detected a rotational velocity in the companion galaxy of $>$175km/s. The progenitor of the companion may have been a rotationally-supported, but yet passive S0 galaxy. The age of the E+A galaxy after quenching the star formation is estimated to be 100-500 Myr, with its centre having slightly younger stellar population. These findings are inconsistent with a simple picture where the dynamical interaction creates infall of the gas reservoir that causes the central starburst/post-starburst. Instead, our results present an important example where the galaxy-galaxy interaction can trigger a galaxy-wide post-starburst phenomena.
description: Accepted for publication in MNRAS
interTwin D4.2 First Architecture design of the DTs capabilities for High Energy Physics, Radio astronomy and Gravitational-wave Astrophysics
Creators: name: Manzi, Andrea
name: Farkas, Levente
name: Tsolaki, Kalliopi
name: Vallecorsa, Sofia
name: Vallero, Sara
name: Razzano, Massimiliano
name: Komijani, Javad
name: Pidopryhora, Yurii
name: Campos, Isabel
Publisher: name: Zenodo
Year: 2023
Subjects: subject: Architecture
subject: FOS: Civil engineering
subject: design
subject: capabilities
subject: Digital Twin Engine
subject: High Energy Physics
subject: GW Astrophysics
subject: Radio Astronomy

description: This deliverable describes the capabilities that the architecture design of a Digital Twin Engine (DTE) has to provide in order to be able to support the use cases coming from the High Energy Physics, Radio Astronomy and GW Astrophysics and the implementation of the related DT Applications. It details the functional specifications and requirements analysis for these use cases. Finally, it provides insights into the architecture design decisions made when developing the blueprint architecture of the DTE to specifically address the needs of the use cases.
Additional file 5 of Cardiogenic shock in Taiwan from 2003 to 2017 (CSiT-15 study)
Creators: name: Chien, Shih-Chieh
name: Hsu, Chien-Yi
name: Liu, Hung-Yi
name: Lin, Chao-Feng
name: Hung, Chung-Lieh
name: Huang, Chun-Yao
name: Chien, Li-Nien
Publisher: name: figshare
Year: 2021
Subjects: subject: Space Science
subject: Medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Cancer
subject: Science Policy
subject: Computational Biology

description: Additional file 5. Baseline characteristics of patients with cardiogenic shock stratified by AMI etiology.
La tradizione manoscritta delle canzoni di Bernart de Ventadorn: appunti di critica esterna
Creators: name: Costantini, Fabrizio
Publisher: name: Università degli Studi di Milano
Year: 2014
Subjects: Bernart de Ventadorn; lirica trobadorica; troubadour lyric; tradizione manoscritta; manuscript tradition; critica testuale; textual criticism

description: La tradizione manoscritta delle cansos di Bernart de Ventadorn è analizzata sotto alcuni aspetti di "critica esterna"; in particolare, sono aggiornati i dati contenuti nell'edizione critica di riferimento e viene verificato l'assetto dei rapporti genetici fra i piani bassi della tradizione. Le analisi, anche con prospettive di ricerca differenti e ulteriori (stratigrafia e genesi dei raggruppamenti, quadro delle attribuzioni, ecc.), sono condotte a partire dalla collocazione dei blocchi testuali di BnVent nell'ambito dei vari manoscritti; allo stesso modo si presenta una sintesi relativa ai rapporti con le serie autoriali circostanti.

The manuscript tradition of Bernart de Ventadorn’s cansos is analysed in some aspects of external criticism; we have updated information from the old critical edition and we have checked the conformation of the genetic relationships concerning the lower levels of this tradition. The analyses, also with different and further perspectives of research (stratigraphy and genesis of the groupings, frame of the attributions, etc), are based mainly on the positioning of their textual blocks of BnVent within all the manuscripts; in the same way, the paper offers a synthesis of the relationships with the surrounding authorial series.
description: Carte romanze, Vol 2, No 1 (2014)
$^{145}$Ba and $^{145, 146}$La structure from lifetime measurements
Creators: name: Olaizola, B.
name: Babu, A.
name: Umashankar, R.
name: Garnsworthy, A. B.
name: Ball, G. C.
name: Bildstein, V.
name: Bowry, M.
name: Burbadge, C.
name: Cabellero-Folch, R.
name: Dillmann, I.
name: Diaz-Varela, A.
name: Dunlop, R.
name: Estradé, A.
name: Garrett, P. E.
name: Hackman, G.
name: MacLean, A. D.
name: Measures, J.
name: Pearson, C. J.
name: Shaw, B.
name: Southall, D.
name: Svensson, C. E.
name: Turko, J.
name: Whitmore, K.
name: Zidar, T.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The occurrence of octupole shapes in even-mass neutron-rich Ba isotopes has been well established. However, the situation with the odd-mass Ba and odd or odd-odd La nuclei around them is far from settled. In order to shed light on these less-studied isotopes, a fast-timing experiment was performed using GRIFFIN at TRIUMF-ISAC. A wealth of excited-state lifetimes in the 100~ps to few ns range have been measured in $^{144, 145, 146}$Ba and $^{145,146}$La populated in the $β^-$ and $β^--n$ decay of $^{145,146}$Cs. The results do not allow to draw firm conclusions on the possible octupole deformation of these nuclei but suggest different spin and parity assignments than previous works. This work highlights the need for more detailed study of the odd and odd-odd isotopes in this region to properly understand their structure.
description: 16 pages, 7 figures
Interrogating the regulatory pursuit of data openness in the EU
Creators: name: Chandrasekhar, Ramya
Publisher: name: Zenodo
Year: 2024
Subjects: Digital Law
Platform regulation
Open data

description: Presentation for the Digital Law Research Colloquium, Geneva, 2024.

Topic of presentation: Analysis of new EU regulations under the EU Data Strategy that enable access to and re-use of data held by online platforms for research. 

Abstract: A significant amount of digital data that is of public interest is created on, circulated and re-used via the Internet. Despite being one of the largest ‘open’ infrastructures, a large amount of the data generated on the Internet is not ‘open’ for collective societal benefit. Rather, the ability to access and re-use this data, including for research, depends significantly on the affordances granted by certain ‘gatekeepers’ of the Internet - online platforms and search engines. Stemming from the 2020 EU Data Strategy, there are now new regulatory frameworks in the EU that can serve as avenues for researchers to access and re-use data held by such gatekeepers. However, these regulations do not account for the continued exercise of infrastructural control by the gatekeepers – through the use of legal frameworks like intellectual property and data protection as shields to limit data access and re-use, restrictve Terms of Service, and opaque APIs. A stronger political orientation towards data commons could prove useful, in order to guide the development and implementation of regulatory frameworks that ‘see’ open data as processes of selective revealing and seek to democratize these processes.
S_4 x Z_2 Flavor Symmetry in Supersymmetric Extra U(1) Model
Creators: name: Daikoku, Y.
name: Okada, H.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We propose a E_6 inspired supersymmetric model with a non-Abelian discrete flavor symmetry (S_4 group); that is, SU(3)_c x SU(2)_W x U(1)_Y x U(1)_X x S_4 x Z_2. In our scenario, the additional abelian gauge symmetry; U(1)_X, not only solves the mu-problem in the minimal Supersymmetric Standard Model(MSSM), but also requires new exotic fields which play an important role in solving flavor puzzles. If our exotic quarks can be embedded into a S_4 triplet, which corresponds to the number of the generation, one finds that dangerous proton decay can be well-suppressed. Hence, it might be expected that the generation structure for lepton and quark in the SM(Standard Model) can be understood as a new system in order to stabilize the proton in a supersymemtric standard model (SUSY). Moreover, due to the nature of the discrete non-Abelian symmetry itself, Yukawa coupling constants of our model are drastically reduced. In our paper, we show two predictive examples of the models for quark sector and lepton sector, respectively.
description: 14 pages, 4 tables. Flavon sector and references are added. Sentences are modified
Additional file 1 of Linking genomic and physiological characteristics of psychrophilic Arthrobacter to metagenomic data to explain global environmental distribution
Creators: name: Shen, Liang
name: Liu, Yongqin
name: Allen, Michelle A.
name: Xu, Baiqing
name: Wang, Ninglian
name: Williams, Timothy J.
name: Wang, Feng
name: Zhou, Yuguang
name: Liu, Qing
name: Cavicchioli, Ricardo
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 1: Tibetan Plateau sampling sites, Arthrobacter phylogenetic, genomic, functional and metagenomic analyses. Supplementary figures. Figure S1. Tibetan Plateau sampling locations. Figure S2. Micrococcaceae phylogenomic trees. Figure S3. Comparison of Arthrobacter genomic characteristics. Figure S4. Comparison of Arthrobacter genome-wide amino acid composition. Figure S5. Correlation between the content of an amino acid and genome G+C content. Figure S6. Protein stability predictions. Figure S7. Enrichment analysis of Arthrobacter functional potential. Supplementary tables. Table S1. Sampling and isolation information associated with Tibetan Plateau Arthrobacter isolates. Table S2. Depth distribution of the 11 Axel Heiberg Island metagenomes enriched in Group C Arthrobacter.
Additional file 6 of Cardiogenic shock in Taiwan from 2003 to 2017 (CSiT-15 study)
Creators: name: Chien, Shih-Chieh
name: Hsu, Chien-Yi
name: Liu, Hung-Yi
name: Lin, Chao-Feng
name: Hung, Chung-Lieh
name: Huang, Chun-Yao
name: Chien, Li-Nien
Publisher: name: figshare
Year: 2021
Subjects: subject: Space Science
subject: Medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Cancer
subject: Science Policy
subject: Computational Biology

description: Additional file 6. Baseline characteristics of patients with cardiogenic shock stratified by 1-year mortality.
When Two Worlds Collide: Using Particle Physics Tools to Visualize the Limit Order Book
Creators: name: Verhulst, Marjolein E.
name: Debie, Philippe
name: Hageboeck, Stephan
name: Pennings, Joost M. E.
name: Gardebroek, Cornelis
name: Naumann, Axel
name: van Leeuwen, Paul
name: Trujillo-Barrera, Andres A.
name: Moneta, Lorenzo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Trading and Market Microstructure (q-fin.TR)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Economics and business
subject: FOS: Physical sciences

description: We introduce a methodology to visualize the limit order book (LOB) using a particle physics lens. Open-source data-analysis tool ROOT, developed by CERN, is used to reconstruct and visualize futures markets. Message-based data is used, rather than snapshots, as it offers numerous visualization advantages. The visualization method can include multiple variables and markets simultaneously and is not necessarily time dependent. Stakeholders can use it to visualize high-velocity data to gain a better understanding of markets or effectively monitor markets. In addition, the method is easily adjustable to user specifications to examine various LOB research topics, thereby complementing existing methods.
description: 51 pages, 9 figures
Socioeconomic concerns, family roles and relationships of the breast cancer patient
Creators: name: Jessup, Margot Anne
Publisher: name: University of British Columbia
Year: 2010

description: The purpose of this study was to explore the socioeconomic needs and concerns of a group of new breast cancer patients and their families with consideration of changes in roles and relationships and patient's feelings about self. The study was conducted in co-operation with the A. Maxwell Evans Clinic, a cancer treatment centre under the direction of the Cancer Control Agency of British Columbia. The scope of this study was restricted to new breast cancer patients referred to the New Patients Clinic in May, 1978 and their primary care-givers. In this study, the primary care-givers were family members most responsible for the patient's rehabilitation. The sample consisted of 16 patients and 14 primary care-givers. Two of the patients' primary care-givers were not available at the time of the interview. The sample included patients with breast cancer in Stages 1, 2, 3 and 4. One interview schedule was designed for the patient and a shorter form for the primary care-giver. An open-ended question about the patients and primary care-givers' greatest concerns were included to identify needs not covered by scheduled topics and to give respondents an opportunity to expand and priorize concerns. Socioeconomic change was defined in terms of changes in place of residence, work activities outside the home, family roles and responsibilities, relationships with family and friends, and feelings about self. The findings indicated that the area of greatest change was in family roles and relationships. Most primary care-givers were interested in talking to the interviewer about some anxieties concerning their new role as primary care-giver. Some primary care-givers also were interested in more information about how to create a rehabilitative environment for the patient. All patients were generally positive toward the Clinic. Several patients expressed a number of suggestions for improving support services and offered ideas about . the attitudes of significant others which affect the patient's sense of well-being and ability to recover. The researcher makes some recommendations for enhancing and developing supportive services for the consideration of the medical team and the specialized social services department in a cancer clinic. The recommendations include approaches to help families recognize and develop new roles to help the patient recover.
A Hubble Space Telescope transit light curve for GJ436b
Creators: name: Bean, J. L.
name: Benedict, G. F.
name: Charbonneau, D.
name: Homeier, D.
name: Taylor, D. C.
name: McArthur, B.
name: Seifahrt, A.
name: Dreizler, S.
name: Reiners, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present time series photometry for six partial transits of GJ436b obtained with the Fine Guidance Sensor instrument on the Hubble Space Telescope (HST). Our analysis of these data yields independent estimates of the host star's radius R_star = 0.505 +0.029/-0.020 R_sun, and the planet's orbital period P = 2.643882 +0.000060/-0.000058 d, orbital inclination i = 85.80 +0.21/-0.25 deg, mean central transit time T_c = 2454455.279241 +0.00026/-0.00025 HJD, and radius R_p = 4.90 +0.45/-0.33 R_earth. The radius we determine for the planet is larger than the previous findings from analyses of an infrared light curve obtained with the Spitzer Space Telescope. Although this discrepancy has a 92% formal significance (1.7 sigma), it might be indicative of systematic errors that still influence the analyses of even the highest-precision transit light curves. Comparisons of all the measured radii to theoretical models suggest that GJ436b has a H/He envelope of ~10% by mass. We also find that the transit times for GJ436b are constant to within 10 s over the 11 planetary orbits that the HST data span. However, the ensemble of published values exhibits a long-term drift and our mean transit time is 128 s later than that expected from the Spitzer ephemeris. The sparseness of the currently available data hinders distinguishing between an error in the orbital period or perturbations arising from an additional object in the system as the cause of the apparent trend. Assuming the drift is due to an error in the orbital period we obtain an improved estimate for it of P = 2.643904 +/- 0.000005 d. This value and our measured transit times will serve as important benchmarks in future studies of the GJ436 system. (abridged)
description: Accepted for publication in A&A
Typhlodromus (Anthoseius) ornatus
Creators: name: Lofego, A. C.
name: De Moraes, G. J.
name: Castro, L. A. S.
Publisher: name: Zenodo
Year: 2004
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Mesostigmata
Phytoseiidae
Typhlodromus
Typhlodromus ornatus

description: Typhlodromus (Anthoseius) ornatus Denmark & Muma
 Amblydromella ornata Denmark & Muma, 1973: 270; Moraes et al., 1986: 169.
 Amblydromella (Aphanoseia) ornata, Denmark & Welbourn, 2002: 308.
 Typhlodromus (Anthoseius) ornatus, Gondim Jr & Moraes, 2001: 89; Moraes et al., 2004: 341.
 Specimens examined: Pirassununga: P. guineense, I­2001 (1).
 Associated phytophagous mites: no phytophagous mites were found associated with this species.
 Previous record: Brazil — São Paulo.
 Remarks: The measurements of an adult female collected are similar to those given in the original description. These measurements are: dorsal shield length 338, width 175, j1 18, j3 15, j4 13, j5 13, j6 13, J2 15, J5 13, z2 13, z3 13, z4 15, z5 10, Z4 23, Z5 35, s4 15, s6 18, S2 20, S4 23, S5 23, r3 18, R1 18, St IV 28, St1–St3 65, St2–St2 60, St5–St5 60, length of ventrianal shield 113, width at ZV2 level 93, width at anus level 83, length of calyx of spermatheca 20.
description: Published as part of Lofego, A. C., De Moraes, G. J. & Castro, L. A. S., 2004, Phytoseiid mites (Acari: Phytoseiidae) on Myrtaceae in the State of São Paulo, Brazil, pp. 1-18 in Zootaxa 516 on page 13, DOI: 10.5281/zenodo.157769
Hospitality and Perceptions of Customers in Service Obtained: Perspectives of the Thai Public and Private Hospitals
Creators: name: Mayuree  Yotawut
Publisher: name: School of Public Administration, National Instituteof Development Administration (NIDA)
Year: 2014
Subjects: Servqual model, customer satisfaction, public hospital, private hospital

description: 1, 21, Journal of Public and Private Management
Color Screening by Pions
Creators: name: Detmold, William
name: Savage, Martin J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Lattice QCD is used to calculate the potential between a static quark and anti-quark in the presence of a finite density of pi^+'s. Correlation functions of multiple pi^+'s are used in conjunction with Wilson-loop correlators to determine the difference between the Q\overline{Q}-potential in free-space and in the presence of a pion condensate. The modifications to the potential are found to have significant dependence on the Q\overline{Q} separation over the range r < 1 fm explored in this work. Our results are consistent with the pion-condensate behaving as a (nonlinear) chromo-dielectric.
description: 4 pages, 5 figs
Pion charge radius from pion+electron elastic scattering data
Creators: name: Cui, Zhu-Fang
name: Binosi, Daniele
name: Roberts, Craig D.
name: Schmidt, Sebastian M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Lattice (hep-lat)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: With the aim of extracting the pion charge radius, we analyse extant precise pion+electron elastic scattering data on $Q^2 \in [0.015,0.144]\,$GeV$^2$ using a method based on interpolation via continued fractions augmented by statistical sampling. The scheme avoids any assumptions on the form of function used for the representation of data and subsequent extrapolation onto $Q^2\simeq 0$. Combining results obtained from the two available data sets, we obtain $r_π= 0.640(7)\,$fm, a value $2.4\,σ$ below today's commonly quoted average. The tension may be relieved by collection and similar analysis of new precise data that densely cover a domain which reaches well below $Q^2 = 0.015\,$GeV$^2$. Considering available kaon+electron elastic scattering data sets, our analysis reveals that they contain insufficient information to extract an objective result for the charged-kaon radius, $r_K$. New data with much improved precision, low-$Q^2$ reach and coverage are necessary before a sound result for $r_K$ can be recorded.
description: 5 pages, 4 figures
Aspects of thick brane worlds: 4D gravity localization, smoothness, and mass gap
Creators: name: Herrera-Aguilar, A.
name: Malagón-Morejón, D.
name: Mora-Luna, R. R.
name: Nucamendi, U.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We review some interrelated aspects of thick brane worlds constructed within the framework of 5D gravity coupled to a scalar field depending on the extra dimension. It turns out that when analyzing localization of 4D gravity in this smooth version of the Randall-Sundrum model, a kind of dichotomy emerges. In the first case the geometry is completely smooth and the spectrum of metric fluctuations shows a single massless bound state, corresponding to the 4D graviton, and a tower of massive states described by a continuous spectrum of Kaluza-Klein excitations starting from zero mass, indicating the lack of a mass gap. In the second case, there are two bound states, a massless 4D graviton and a massive excitation, separated by a mass gap from a continuous spectrum of massive modes; nevertheless, the presence of a mass gap in the graviton spectrum of the theory is responsible for a naked singularity at the boundaries (or spatial infinity) of the Riemannian manifold. However, the imposition of unitary boundary conditions, which is equivalent to eliminating the continuous spectrum of gravitational massive modes, renders these singularities harmless from the physical point of view, providing the viability of the model.
description: 10 pages in latex, references added and updated
Explaining the mass-to-light ratios of globular clusters
Creators: name: Kruijssen, J. M. Diederik
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The majority of observed mass-to-light ratios of globular clusters are too low to be explained by `canonical' cluster models, in which dynamical effects are not accounted for. Moreover, these models do not reproduce a recently reported trend of increasing M/L with cluster mass, but instead predict mass-to-light ratios that are independent of cluster mass for a fixed age and metallicity. This study aims to explain the M/L of globular clusters in four galaxies by including stellar evolution, stellar remnants, and the preferential loss of low-mass stars due to energy equipartition. Analytical cluster models are applied that account for stellar evolution and dynamical cluster dissolution to samples of globular clusters in Cen A, the Milky Way, M31 and the LMC. The models include stellar remnants and cover metallicities in the range Z=0.0004-0.05. Both the low observed mass-to-light ratios and the trend of increasing M/L with cluster mass can be reproduced by including the preferential loss of low-mass stars, assuming reasonable values for the dissolution timescale. This leads to a mass-dependent M/L evolution and increases the explained percentage of the observations from 39% to 92%. This study shows that the hitherto unexplained discrepancy between observations and models of the mass-to-light ratios of globular clusters can be explained by dynamical effects, provided that the globular clusters exhibiting low M/L have dissolution timescales within the ranges assumed in this Letter. Furthermore, it substantiates that M/L cannot be assumed to be constant with mass at fixed age and metallicity.
description: 5 pages, 3 figures, 1 table; letter accepted by A&A - minor changes to match the published version
Spatial Distributions of Young Stars
Creators: name: Kraus, Adam L.
name: Hillenbrand, Lynne A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We analyze the spatial distributions of young stars in Taurus-Auriga and Upper Sco as determined from the two-point correlation function (i.e. the mean surface density of neighbors). The corresponding power-law fits allow us to determine the fractal dimensions of each association's spatial distribution, measure the stellar velocity dispersions, and distinguish between the bound binary population and chance alignments of members. We find that the fractal dimension of Taurus is D~1.05, consistent with its filamentary structure. The fractal dimension of Upper Sco may be even shallower (D~0.7), but this fit is uncertain due to the limited area and possible spatially-variable incompleteness. We also find that random stellar motions have erased all primordial structure on scales of <0.07 degrees in Taurus and <1.7 degrees in Upper Sco; given ages of ~1 Myr and ~5 Myr, the corresponding internal velocity dispersions are ~0.2 km/s and ~1.0 km/s, respectively. Finally, we find that binaries can be distinguished from chance alignments at separations of <120" (17000 AU) in Taurus and 75" (11000 AU) in Upper Sco. The binary populations in these associations that we previously studied, spanning separations of 3-30", are dominated by binary systems. However, the few lowest-mass pairs (M_prim < 0.3 M_sun) might be chance alignments.
description: Accepted to ApJL; 5 pages, 2 figures in emulateapj format
Modeling of Pan Evaporation Based on the Development of Machine Learning Methods
Creators: name: Al-Mukhtar, Mustafa
Publisher: name: arXiv
Year: 2021
Subjects: subject: Popular Physics (physics.pop-ph)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: For effective planning and management of water resources and implementation of the related strategies, it is important to ensure proper estimation of evaporation losses, especially in regions that are prone to drought. Changes in climatic factors, such as changes in temperature, wind speed, sunshine hours, humidity, and solar radiation can have a significant impact on the evaporation process. As such, evaporation is a highly non-linear, non-stationary process, and can be difficult to be modeled based on climatic factors, especially in different agro-climatic conditions. The aim of this study, therefore, is to investigate the feasibility of several machines learning (ML) models (conditional random forest regression, Multivariate Adaptive Regression Splines, Bagged Multivariate Adaptive Regression Splines, Model Tree M5, K- nearest neighbor, and the weighted K- nearest neighbor) for modeling the monthly pan evaporation estimation. This study proposes the development of newly explored ML models for modeling evaporation losses in three different locations over the Iraq region based on the available climatic data in such areas. The evaluation of the performance of the proposed model based on various evaluation criteria showed the capability of the proposed weighted K- nearest neighbor model in modeling the monthly evaporation losses in the studies areas with better accuracy when compared with the other existing models used as a benchmark in this study.
Geometric algebras on projective surfaces
Creators: name: Sierra, Susan J.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 14A22, 16P40, 16P90, 16S38, 16W59, 18E15

description: Let X be a projective surface, let σbe an automorphism of X, and let L be a σ-ample invertible sheaf on X. We study the properties of a family of subrings, parameterized by geometric data, of the twisted homogeneous coordinate ring B(X, L, σ). In particular, we find necessary and sufficient conditions for these subrings to be noetherian. We also study their homological properties, their associated noncommutative projective schemes, and when they are maximal orders. In the process, we produce new examples of maximal orders; these are graded and have the property that no Veronese subring is generated in degree 1. Our results are used in a companion paper to give defining data for a large class of noncommutative projective surfaces.
description: 39 pages; v2 results largely unchanged, but notation describing algebras revised significantly. As a result details of many proofs have changed, and statements of some results. To appear in Journal of Algebra
Stability of Galactic Gas Disks and the Formation of Massive Clusters
Creators: name: Escala, Andres
name: Larson, Richard B.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study gravitational instabilities in disks, with special attention to the most massive clumps that form because they are expected to be the progenitors of globular-type clusters. The maximum unstable mass is set by rotation and depends only on the surface density and orbital frequency of the disk. We propose that the formation of massive clusters is related to this largest scale in galaxies not stabilized by rotation. Using data from the literature, we predict that globular-like clusters can form in nuclear starburst disks and protogalactic disks but not in typical spiral galaxies, in agreement with observations.
description: 12 pages, 2 figures, submitted to ApjL
Non-reciprocal magnetoresistance, directional inhomogeneity and mixed symmetry Hall devices
Creators: name: Kopnov, Gregory
name: Gerber, Alexander
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Phenomenology similar to the nonreciprocal charge transport violating Onsagers reciprocity relations can develop in directionally inhomogeneous conducting films with nonuniform Hall coefficient along the current trajectory. The effect is demonstrated in ferromagnetic CoPd films and analyzed in comparison with the unidirectional magnetoresistance phenomena. We suggest to use an engineered inhomogeneity for spintronics applications and present the concept of mixed symmetry Hall devices in which transverse to current Hall signal is measured in a longitudinal contacts arrangement. Magnetization reversal and memory detection is demonstrated in the three terminal and the partitioned normal metal-ferromagnet (NM - FM) device designs. Multi-bit memory is realized in the partitioned FM-NM-FM structure. The relative amplitude of the antisymmetric signal in the engineered ferromagnetic devices is few percent which is 10 to 1000 times higher than in their unidirectional magnetoresistance analogues.
Resonant photoproduction of ultrarelativistic electron-positron pairs on a nucleus in strong monochromatic light field
Creators: name: Roshchupkin, Sergei P.
name: Larin, Nikita R.
name: Dubov, Victor V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: For complete development of quantum electrodynamics in the presence of a strong external field, the proper understanding of resonant processes and all their peculiarities is essential. We present our attempt to analytically investigate the resonant case of laser-assisted electron-positron pair photoproduction on a nucleus. Due to the presence of external field, the intermediate virtual particle may become real, herewith the second order process in the fine structure constant effectively reduces into the two successive first order processes. All inherent kinematics features were discussed in details and the resonant differential cross section was obtained. We established that the resonant energies of produced particles ambiguously depend on the positron (channel A) or electron (channel B) outgoing angle, and the certain minimal amount of absorbed wave photons are required for resonance to happen. Furthermore, the resonant cross section significantly exceeds the corresponding one in the absence of the external field within the particular kinematic regions and consequently, the considered process can be used qua a marker for probing theoretical predictions of quantum electrodynamics with strong background field.
Large $N$ external-field quantum electrodynamics
Creators: name: Karbstein, Felix
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We advocate the study of external-field quantum electrodynamics with $N$ charged particle flavors. Our main focus is on the Heisenberg-Euler effective action for this theory in the large $N$ limit which receives contributions from all loop orders. The contributions beyond one loop stem from one-particle reducible diagrams. We show that specifically in constant electromagnetic fields the latter are generated by the one-loop Heisenberg-Euler effective Lagrangian. Hence, in this case the large $N$ Heisenberg-Euler effective action can be determined explicitly at any desired loop order. We demonstrate that further analytical insights are possible for electric-and magnetic-like field configurations characterized by the vanishing of one of the secular invariants of the electromagnetic field and work out the all-orders strong field limit of the theory.
description: 15 pages
The Spatial distribution of diffuse solar radiation in the sky hemisphere
Creators: name: McArthur, Lorne John Bruce
Publisher: name: University of British Columbia
Year: 2010

description: A technique was developed to produce maps of the distribution of diffuse solar radiation over the sky hemisphere for a variety of sky conditions. This procedure, by utilizing both actinometric and photographic information, overcomes the sampling problems of previous methods. Photographs were simultaneously exposed with actinometric measurements of diffuse solar radiance. The photographs were then digitized and the density values corresponding to the actinometric measurements correlated with the known radiances. The equation produced was then utilized to determine the radiance for each density value for the entire photograph. From this information, a map of diffuse solar radiation over the sky hemisphere was produced. To determine the quality of the radiance distributions, the estimated radiances were numerically integrated and compared with the diffuse irradiance incident on a horizontal surface. These were usually found to be within ±10% for the sky conditions examined. A further test, using this method to determine the diffuse irradiance, was performed to estimate the shortwave irradiance on several south-facing inclined surfaces. The results were found to be within ±5% of the measured values. The diffuse radiation distributions for clear skies were also compared with similar work and commented upon. This technique, although still not perfected, provides a superior means for instantaneously modelling diffuse energy and could also be utilized in the collection of the data base necessary for testing theoretical models of scattering in the atmosphere.
A blueprint for detecting supersymmetric dark matter in the Galactic halo
Creators: name: Springel, Volker
name: White, Simon D. M.
name: Frenk, Carlos S.
name: Navarro, Julio F.
name: Jenkins, Adrian
name: Vogelsberger, Mark
name: Wang, Jie
name: Ludlow, Aaron
name: Helmi, Amina
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Dark matter is the dominant form of matter in the universe, but its nature is unknown. It is plausibly an elementary particle, perhaps the lightest supersymmetric partner of known particle species. In this case, annihilation of dark matter in the halo of the Milky Way should produce gamma-rays at a level which may soon be observable. Previous work has argued that the annihilation signal will be dominated by emission from very small clumps (perhaps smaller even than the Earth) which would be most easily detected where they cluster together in the dark matter halos of dwarf satellite galaxies. Here we show, using the largest ever simulation of the formation of a galactic halo, that such small-scale structure will, in fact, have a negligible impact on dark matter detectability. Rather, the dominant and likely most easily detectable signal will be produced by diffuse dark matter in the main halo of the Milky Way. If the main halo is strongly detected, then small dark matter clumps should also be visible, but may well contain no stars, thereby confirming a key prediction of the Cold Dark Matter (CDM) model.
description: to appear in Nature, 23 pages, 8 figures, includes Supplementary Information
Additional file 1 of In vitro functional rescue by ivacaftor of an ABCB11 variant involved in PFIC2 and intrahepatic cholestasis of pregnancy
Creators: name: Mareux, Elodie
name: Lapalus, Martine
name: Ben-Saad, Amel
name: Callebaut, Isabelle
name: Falguières, Thomas
name: Gonzales, Emmanuel
name: Jacquemin, Emmanuel
Publisher: name: figshare
Year: 2021
Subjects: subject: Biophysics
subject: Biochemistry
subject: Medicine
subject: Neuroscience
subject: Pharmacology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Cancer
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 1. Supplementary Materials and Methods and Figure S1 "Superimposition of the two transporter halves of the 3D structure of ABCB11".
Comment on "Arbitrated quantum-signature scheme"
Creators: name: Curty, Marcos
name: Lütkenhaus, Norbert
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the quantum signature scheme proposed by Zeng and Keitel [Phys. Rev. A 65, 042312 (2002)]. It uses Greenberger-Horne-Zeilinger (GHZ) states and the availability of a trusted arbitrator. However, in our opinion the protocol is not clearly operationally defined and several steps are ambiguous. Moreover, we argue that the security statements claimed by the authors are incorrect.
description: 4 pages
Micromechanics reveal strain rate dependent transition between dislocation mechanisms in a dual phase high entropy alloy
Creators: name: Kalacska, Szilvia
Publisher: name: Zenodo
Year: 2024

description: An equimolar NiCoFeCrGa high entropy alloy having dual-phase homogeneous components was studied, where the constituent phases exhibit distinct mechanical properties. Micropillars with various diameters were created from two differently heat treated samples, then they were compressed at slow strain rates, that revealed the material's limited sensitivity to size. On the other hand, increased strain rate sensitivity at high deformation speeds was observed, that differs substantially depending on the phase composition of the specimen. Dislocations within the two phases were studied by high resolution transmission electron microscopy and high angular resolution electron backscatter diffraction. The performed chemical analysis confirmed that slow cooling during casting create Cr-rich precipitates, that have significant impact on the global strength of the material.
Visual orbit of GJ 164 AB
Creators: name: Martinache, Frantz
name: Rojas-Ayala, Barbara
name: Ireland, Michael J.
name: Lloyd, James P.
name: Tuthill, Peter G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report seven successful observations of the astrometric binary GJ 164 AB system with aperture masking interferometry. The companion, with a near infrared contrast of 5:1 was detected beyond the formal diffraction limit. Combined with astrometric observations from the literature, these observations fix the parallax of the system, and allow a model-independent mass determination of both components. We find the mass of GJ 164B to be $ 0.086 \pm 0.007 M_{\sun}$. An infrared spectroscopic study of a sample of M-Dwarfs outlines a method for calibrating metallicity of M-Dwarfs. Results from the newly commissionned TripleSpec spectrograph reveal that the GJ 164 system is at least of Solar metallicity. Models are not consistent with color and mass, requiring a very young age to accommodate a secondary too luminous, a scenario ruled out by the kinematics.
description: 9 pages, 8 figures. Submitted to ApJ
Iterations of nonlinear entanglement witnesses
Creators: name: Moroder, Tobias
name: Gühne, Otfried
name: Lütkenhaus, Norbert
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We describe a generic way to improve a given linear entanglement witness by a quadratic, nonlinear term. This method can be iterated, leading to a whole sequence of nonlinear witnesses, which become stronger in each step of the iteration. We show how to optimize this iteration with respect to a given state, and prove that in the limit of the iteration the nonlinear witness detects all states that can be detected by the positive map corresponding to the original linear witness.
description: 11 pages, 5 figures
Outliers from the Mass--Metallicity Relation II: A Sample of Massive Metal-Poor Galaxies from SDSS
Creators: name: Peeples, Molly S.
name: Pogge, Richard W.
name: Stanek, K. Z.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a sample of 42 high-mass low-metallicity outliers from the mass--metallicity relation of star-forming galaxies. These galaxies have stellar masses that span log(M_*/M_sun) ~9.4 to 11.1 and are offset from the mass--metallicity relation by -0.3 to -0.85 dex in 12+log(O/H). In general, they are extremely blue, have high star formation rates for their masses, and are morphologically disturbed. Tidal interactions are expected to induce large-scale gas inflow to the galaxies' central regions, and we find that these galaxies' gas-phase oxygen abundances are consistent with large quantities of low-metallicity gas from large galactocentric radii diluting the central metal-rich gas. We conclude with implications for deducing gas-phase metallicities of individual galaxies based solely on their luminosities, specifically in the case of long gamma-ray burst host galaxies.
description: Accepted for publication in ApJ; 11 pages, 11 figures
New Proposed Mechanism of Actin-Polymerization-Driven Motility
Creators: name: Lee, Kun-Chun
name: Liu, Andrea J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Cell Behavior (q-bio.CB)
subject: Subcellular Processes (q-bio.SC)
subject: FOS: Biological sciences

description: We present the first numerical simulation of actin-driven propulsion by elastic filaments. Specifically, we use a Brownian dynamics formulation of the dendritic nucleation model of actin-driven propulsion. We show that the model leads to a self-assembled network that exerts forces on a disk and pushes it with an average speed. This simulation approach is the first to observe a speed that varies non-monotonically with the concentration of branching proteins (Arp2/3), capping protein and depolymerization rate (ADF), in accord with experimental observations. Our results suggest a new interpretation of the origin of motility that can be tested readily by experiment.
description: 31 pages, 5 figures
Conformal scalar NUT-like dyons in conformal electrodynamics
Creators: name: Zhang, Ming
name: Jiang, Jie
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We construct conformally scalar NUTty dyon black holes in non-linear electrodynamics (NLE) which possess conformal and duality-rotation symmetries and are characterized by a free dimensionless parameter. The thermodynamic first law of the black hole is formulated. Then we explore the strong gravitational effects of the black hole, mainly focusing on the innermost stable circular orbits (ISCOs) of massive particles and shadows formed by the photons. One of our interesting results is that if the black hole is endowed with a positive real conformal scalar charge rendering it Reissner-Nordström-like, the radii of the ISCOs and the shadow both increase with the increasing NLE parameter signifying the increasing nonlinearity of the electromagnetic field.
description: 10 pages