cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Bridging the Gap between Events and Frames through Unsupervised Domain Adaptation
Creators: name: Messikommer, Nico
name: Gehrig, Daniel
name: Gehrig, Mathias
name: Scaramuzza, Davide
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Reliable perception during fast motion maneuvers or in high dynamic range environments is crucial for robotic systems. Since event cameras are robust to these challenging conditions, they have great potential to increase the reliability of robot vision. However, event-based vision has been held back by the shortage of labeled datasets due to the novelty of event cameras. To overcome this drawback, we propose a task transfer method to train models directly with labeled images and unlabeled event data. Compared to previous approaches, (i) our method transfers from single images to events instead of high frame rate videos, and (ii) does not rely on paired sensor data. To achieve this, we leverage the generative event model to split event features into content and motion features. This split enables efficient matching between latent spaces for events and images, which is crucial for successful task transfer. Thus, our approach unlocks the vast amount of existing image datasets for the training of event-based neural networks. Our task transfer method consistently outperforms methods targeting Unsupervised Domain Adaptation for object detection by 0.26 mAP (increase by 93%) and classification by 2.7% accuracy.
Ruehssia pinetorum Gonz.
Creators: name: Lozada-Pérez, Lucio
name: Ramírez-Marcial, Neptalí
name: Martínez, César Adrián González-
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Gentianales
Apocynaceae
Ruehssia
Ruehssia pinetorum

description: Ruehssia pinetorum (Standl. & L.O. Williams) Gonz. -Martínez & Lozada-Pérez, comb. nov.
Basionym:— Marsdenia pinetorum Standl. & L.O. Williams (Williams 1968: 51)
Type:— HONDURAS. Dept. Morazán: near Hoya Grande, drainage of Río Yeguare, pine-oak forest, 17 Aug 1947, Williams & Molina 13272 (holotype: F! [F 0048950 F]; isotypes: EAP!).
description: Published as part of Lozada-Pérez, Lucio, Ramírez-Marcial, Neptalí & Martínez, César Adrián González-, 2020, Ruehssia sumiderensis (Apocynaceae), a new species from Chiapas state, Mexico, pp. 69-80 in Phytotaxa 440 (1) on page 72, DOI: 10.11646/phytotaxa.440.1.4, http://zenodo.org/record/13873270
The effect of ’rc’ mutation on the performance of chickens under different densities and flock sizes
Creators: name: Ali, Ahmed
Publisher: name: University of British Columbia
Year: 2010

description: The impact of visual contact or the lack of it on egg production was investigated by utilizing genetically blind chickens in a factorial experiment involving two genotypes (blind vs sighted), two densities (1000cm² per bird vs 2000cm² per bird), two flock sizes, and two replications. Parameters measured were: number of eggs collected, egg weight, amount of feed taken from feed trough, body weight gain, fertility of eggs, feather pecking and comb damage scores, leukocyte count, plasma corticosterone level and adrenal gland weight. During the two-month experimental period, blind hens produced 12.7% more eggs while requiring 44.lg less feed per bird per day compared to normal hens. There was no significant difference in body weight gained between the two genotypes. Thus blind hens had better feed efficiency compared to normal hens. Significant genotype x flock size and genotype x density interactions also indicated that the performance of the blind chickens was less sensitive to densities and flock sizes compared with normal chickens. Other parameters measured provided evidence that the blind chickens were less active socially, and had better feather coverage during the experimental period. These parameters also provided circumstantial evidence that the blind chickens were under less stress than normal ones. It is therefore concluded that the blind chickens had less energy requirement for activities other than egg production. Results from this experiment indicate that the genetically blind chicken not only has good potential as an experimental animal but also may have some commercial value.
On the Local equivalence of the Black Scholes and the Merton Garman equations
Creators: name: Arraut, Ivan
Publisher: name: arXiv
Year: 2024
Subjects: subject: Pricing of Securities (q-fin.PR)
subject: FOS: Economics and business

description: It was demonstrated previously that the stochastic volatility emerges as the gauge field necessary for restoring the local symmetry under changes of the prices of the stocks inside the Black-Scholes (BS) equation. When this occurs, then a Merton-Garman-like equation emerges. From the perspective of manifolds, this means that the Black-Scholes equation and the Merton-Garman (MG) one can be considered as locally equivalent. In this scenario, the MG Hamiltonian is a special case of a more general Hamiltonian, here called gauge-Hamiltonian. We then show that the gauge character of the volatility implies some specific functional relation between the prices of the stock and the volatility. The connection between the prices of the stocks and the volatility, is a powerful tool for improving the volatility estimations in the stock market, which is a key ingredient for the investors to make good decisions. Finally, we define an extended version of the martingale condition, defined for the gauge-Hamiltonian.
description: 13 pages, 6 figures
title: Reporting Poverty: The Political Unconscious in Journalistic Responses to Poverty and Protest During the Cotton Crisis.
Creators: name: Broady, R
Publisher: name: Liverpool John Moores University
Year: 2019

description: The poor do not represent themselves in the Press; despite being the first victims of economic crises, they are instead presented by journalistic mediators. This thesis utilises the methodology outlined in Fredric Jameson’s seminal text The Political Unconscious Narrative as a Socially Symbolic Act (1981) to unearth that mediation. The thesis posits that, by examining journalistic responses to poverty and protest, during a time of recognised and short-term economic crisis, it is possible to unearth the political unconscious, and strategies of containment employed which are intended to conceal the relationship between labour and value, in order to defend the status quo. It is further posited that an investigation of three politically and commercially competitive newspapers will reveal a broad strategy of containment beyond the political binary of left and right. As such, the study considers the liberal Manchester Guardian, the conservative Manchester Courier and the radical Manchester Examiner and Times. The analysis focuses on the reporting of political agitation in Stevenson Square, Manchester, during the Lancashire Cotton Crisis and the American Civil War and around the subject of legislation employed to manage poverty. The Cotton Crisis between 1861 and 1865, saw destitution among unemployed cotton workers, who faced the Labour Test when seeking ‘famine relief’ in order to survive. This economic crisis is of recognised international political and historical significance and is well-researched, but there has not been a broad study of the journalistic response in its representation of poverty and protest in Manchester. The British response to the American Civil War, spanning the same time period, is the focus of much debate, with a focus on Manchester, as is the responses to relief payments to the unemployed, with reference to the city, but analysis of political protest in Manchester in reaction to poverty legislation is scant. Further, available research, while extensive in regard to the history of the Victorian press, is less developed into the ideology of mid nineteenth-century journalism as specifically contributing to an understanding and presentation of poverty. The response of the unemployed workers is researched with regard to the experience of poverty, particularly in terms of poetry and dialect, but the journalistically reported words of their political protests during the Cotton Crisis has not, until now, been thoroughly analysed. This thesis, in considering journalistic copy totalling 43,000 words from late 1862 to early 1863, argues that the political unconscious masked the horror of poverty and mediated the collective experience of working class existence to defend the status quo.
Fermi surface of CeIn3 above the Neel critical field
Creators: name: Harrison, N.
name: Sebastian, S. E.
name: Mielke, C. H.
name: Paris, A.
name: Gordon, M. J.
name: Swenson, C. A.
name: Rickel, D. G.
name: Pacheco, M. D.
name: Ruminer, P. F.
name: Schillig, J. B.
name: Sims, J. R.
name: Lacerda, A. H.
name: Suzuki, M. T.
name: Harima, H.
name: Ebihara, T.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report measurements of the de Haas-van Alphen effect in CeIn3 in magnetic fields extending to ~90 T, well above the Ne'el critical field of Hc ~61 T. The unreconstructed Fermi surface a-sheet is observed in the high magnetic field polarized paramagnetic limit, but with its effective mass and Fermi surface volume strongly reduced in size compared to that observed in the low magnetic field paramagnetic regime under pressure. The spheroidal topology of this sheet provides an ideal realization of the transformation from a `large Fermi surface' accommodating f-electrons to a `small Fermi surface' when the f-electron moments become polarized.
description: 4 pages
Competition of First-Order and Second-Order Topology on the Honeycomb Lattice
Creators: name: Bunney, Matthew
name: Mizoguchi, Tomonari
name: Hatsugai, Yasuhiro
name: Rachel, Stephan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate both first-order topology, as realized through Haldane's model, and second-order topology, implemented through an additional Kekulé-distortion, on the honeycomb lattice. The interplay and competition of both terms result in a phase diagram at half-filling which contains twelve distinct phases. All phases can be characterized by the first Chern number or by a quantized $\mathbb{Z}_Q$ Berry phase. Highlights include phases with high Chern numbers, a novel $\mathbb{Z}_6$ topological phase, but also coupled kagome-lattice Chern insulators. Furthermore, we explore the insulating phases at lower fillings, and find again first-order and second-order topological phases. Finally, we identify real-space structures which feature corner states not only at half but also at third and sixth fillings, in agreement with the quantized $\mathbb{Z}_Q$ Berry phases.
description: 19 pages, 14 figures
Near room-temperature ferromagnetism from double-exchange in the van der Waals material CrGeTe$_3$: evidence from optical conductivity under pressure
Creators: name: Ebad-Allah, Jihaan
name: Guterding, Daniel
name: Varma, Meera
name: Diware, Mangesh
name: Ganorkar, Shraddha
name: Jeschke, Harald O.
name: Kuntscher, Christine A.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The unexpected discovery of intrinsic ferromagnetism in layered van der Waals materials has sparked interest in both their fundamental properties and their potential for novel applications. Recent studies suggest near room-temperature ferromagnetism in the pressurized van der Waals crystal CrGeTe$_3$. We perform a comprehensive experimental and theoretical investigation of magnetism and electronic correlations in CrGeTe$_3$, combining broad-frequency reflectivity measurements with density functional theory and dynamical mean-field theory calculations. Our experimental optical conductivity spectra trace the signatures of developing ferromagnetic order and of the insulator-to-metal transition (IMT) as a function of temperature and hydrostatic pressure. With increasing pressure, we observe the emergence of a mid-infrared feature in the optical conductivity, indicating the development of strong orbital-selective correlations in the high-pressure ferromagnetic phase. We find a distinct relationship between the plasma frequency and Curie temperature of CrGeTe$_3$, which strongly suggests that a double-exchange mechanism is responsible for the observed near room-temperature ferromagnetism. Our results clearly demonstrate the existence of a charge-transfer gap in the metallic phase, ruling out its previously conjectured collapse under pressure.
description: 9+18 pages, 4+25 figures
Zaommomentedon newbyi Kerrich 1969
Creators: name: Prins, Jurate De
name: Gumovsky, Alex
name: Coninck, Eliane De
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Eulophidae
Zaommomentedon
Zaommomentedon newbyi

description: Zaommomentedon newbyi (Kerrich, 1969)
 Material examined. Kenya: 1♀, Arabuko Sokoke, Mixed forest, 50 m, 05.iv.2001, ex Cremaspora trifolia (Rubiaceae), 21.iv.2001, host Caloptilia mwamba sp. nov. (Gracillariidae), 03°17'S 39°58'E (E8), leg. J. & W. De Prins, in RMCA.
 Host. Caloptilia mwamba sp. nov. (Gracillariidae) (new record); reared from Leucoptera sp. (Lyonetiidae) on Terminalia ivorensis A. Chev. [Combretaceae] (Kerrich 1969: 221);
 Distribution. Kenya (new record), Nigeria (Kerrich 1969: 221).
description: Published as part of Prins, Jurate De, Gumovsky, Alex & Coninck, Eliane De, 2015, Discovery of a new species of Caloptilia (Lepidoptera: Gracillariidae) from east and central Africa with its suggested associated host (Gentianales: Rubiaceae) and natural enemies (Hymenoptera: Eulophidae), pp. 383-407 in Zootaxa 3957 (4) on page 400, DOI: 10.11646/zootaxa.3957.4.2, http://zenodo.org/record/254191
Ce-site dilution in the ferromagnetic Kondo lattice CeRh$_6$Ge$_4$
Creators: name: Xu, Jia-Cheng
name: Su, Hang
name: Kumar, Rohit
name: Luo, Shuai-Shuai
name: Nie, Zhi-Yong
name: Wang, An
name: Du, Feng
name: Li, Rui
name: Smidman, Michael
name: Yuan, Hui-Qiu
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The heavy fermion ferromagnet CeRh$_6$Ge$_4$ is the first example of a clean stoichiometric system where the ferromagnetic transition can be continuously suppressed by hydrostatic pressure to a quantum critical point. In order to reveal the outcome when the magnetic lattice of CeRh$_6$Ge$_4$ is diluted with non-magnetic atoms, this study reports comprehensive measurements of the physical properties of both single crystal and polycrystalline samples of La$_x$Ce$_{1-x}$Rh$_6$Ge$_4$. With increasing $x$, the Curie temperature decreases, and no transition is observed for $x$ $>$ 0.25, while the system evolves from exhibiting coherent Kondo lattice behaviors at low $x$, to the Kondo impurity scenario at large $x$. Moreover, non-Fermi liquid behavior (NFL) is observed over a wide doping range, which agrees well with the disordered Kondo model for 0.52 $\leq$ $x$ $\leq$ 0.66, while strange metal behavior is revealed in the vicinity of $x_c$ = 0.26.
description: 6 pages, 5 figures
Commissioning ATLAS and CMS with top quarks
Creators: name: Acharya, B. S.
name: Cavallari, F.
name: Corcella, G.
name: Di Sipio, R.
name: Petrucciani, G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The large ttbar production cross-section at the LHC suggests the use of top quark decays to calibrate several critical parts of the detectors, such as the trigger system, the jet energy scale and b-tagging.
description: 6 pages, 5 figures. Talk given at `V Workshop Italiano sulla Fisica pp a LHC', Perugia, Italy, 30 January - 2 February 2008
GhostShiftAddNet: More Features from Energy-Efficient Operations
Creators: name: Bi, Jia
name: Hare, Jonathon
name: Merrett, Geoff V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences

description: Deep convolutional neural networks (CNNs) are computationally and memory intensive. In CNNs, intensive multiplication can have resource implications that may challenge the ability for effective deployment of inference on resource-constrained edge devices. This paper proposes GhostShiftAddNet, where the motivation is to implement a hardware-efficient deep network: a multiplication-free CNN with fewer redundant features. We introduce a new bottleneck block, GhostSA, that converts all multiplications in the block to cheap operations. The bottleneck uses an appropriate number of bit-shift filters to process intrinsic feature maps, then applies a series of transformations that consist of bit-wise shifts with addition operations to generate more feature maps that fully learn to capture information underlying intrinsic features. We schedule the number of bit-shift and addition operations for different hardware platforms. We conduct extensive experiments and ablation studies with desktop and embedded (Jetson Nano) devices for implementation and measurements. We demonstrate the proposed GhostSA block can replace bottleneck blocks in the backbone of state-of-the-art networks architectures and gives improved performance on image classification benchmarks. Further, our GhostShiftAddNet can achieve higher classification accuracy with fewer FLOPs and parameters (reduced by up to 3x) than GhostNet. When compared to GhostNet, inference latency on the Jetson Nano is improved by 1.3x and 2x on the GPU and CPU respectively. Code is available open-source on \url{https://github.com/JIABI/GhostShiftAddNet}.
The Potential of Citizen Platforms for Requirements Engineering of Large Socio-Technical Software Systems
Creators: name: Ruohonen, Jukka
name: Hjerppe, Kalle
Publisher: name: arXiv
Year: 2024
Subjects: subject: Software Engineering (cs.SE)
subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: Participatory citizen platforms are innovative solutions to digitally better engage citizens in policy-making and deliberative democracy in general. Although these platforms have been used also in an engineering context, thus far, there is no existing work for connecting the platforms to requirements engineering. The present paper fills this notable gap. In addition to discussing the platforms in conjunction with requirements engineering, the paper elaborates potential advantages and disadvantages, thus paving the way for a future pilot study in a software engineering context. With these engineering tenets, the paper also contributes to the research of large socio-technical software systems in a public sector context, including their implementation and governance.
description: Proceedings of the 31st International Working Conference on Requirements Engineering: Foundation for Software Quality (REFSQ 2025), Springer, pp. 295-303
Toward explaining black hole entropy quantization in loop quantum gravity
Creators: name: Sahlmann, Hanno
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: In a remarkable numerical analysis of the spectrum of states for a spherically symmetric black hole in loop quantum gravity, Corichi, Diaz-Polo and Fernandez-Borja found that the entropy of the black hole horizon increases in what resembles discrete steps as a function of area. In the present article we reformulate the combinatorial problem of counting horizon states in terms of paths through a certain space. This formulation sheds some light on the origins of this step-like behavior of the entropy. In particular, using a few extra assumptions we arrive at a formula that reproduces the observed step-length to a few tenths of a percent accuracy. However, in our reformulation the periodicity ultimately arises as a property of some complicated process, the properties of which, in turn, depend on the properties of the area spectrum in loop quantum gravity in a rather opaque way. Thus, in some sense, a deep explanation of the observed periodicity is still lacking.
description: 15 pages, 5 figures. v3: final version (essentially as it appeared in PRD)
Amine-functionalized frameworks as highly actives catalysts for chemical fixation of CO2 under solvent and co-catalyst free conditions
Creators: name: Dehghanpour, Saeed
name: Mahdie Saghian
name: Massoomeh Sharbatdaran
Publisher: name: figshare
Year: 2021
Subjects: subject: Crystallography
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: 39904 Organometallic Chemistry

description: AbstractHerein, we report the adoption of adjustable composition nitrogen-rich units via introduction of diverse amine groups to an unsaturated metal organic framework, MIL-100(Cr), and the application of the products obtained as novel catalysts in the aspect of CO2 cycloaddition reactions to afford cyclic carbonates in the absence of cocatalyst and solvent under mild conditions (60 °C, 1 MPa). Incorporation of amine groups to the frameworks leads to substantial increment in the catalytic performance of the structures. The concomitant presence of acidic and basic sites in the structure causes great conversion and selectivity in cycloaddition reactions even for large and bulky epoxides. The comparison of various groups of amines (2-aminopyridine, 1,2-phenylene diamine, 3- aminopyridine and ethylene diamine) incorporated on the surface with different orientations demonstrates the effect of the orientation type in catalytic activity. CO2 gas sorption measurement helps to better understand the process of catalytic activity. The pristine MOF is unable to progress the reaction without addition of co-catalyst.
Comprehensive study of IC4665
Creators: name: Miret-Roig, Núria
name: Bouy, Hervé
name: Olivares, Javier
Publisher: name: Zenodo
Year: 2019
Subjects: open clusters and associations: IC4665
mass function
spatial distribution

description: IC 4665 is one of the few well-known, young (30 Myr), open clusters in the solar neighbourhood. The relatively young age of

this cluster provides a key anchor to study the stellar and planetary formation process. In addition it is a good target where to

test evolutionary models. We aim to provide a comprehensive membership analysis of this open cluster which allows to study

its properties (empirical isochrones, luminosity and mass functions, spatial distribution). We combine the Gaia DR2 catalogue

together with the deep, ground based COSMIC DANCe catalogue to compute membership probabilities. We find 819 candidate

members of IC 4665 with high membership probabilities, 50% of which are new members, and we estimate that 20% might be

contaminants. This represents a signicant increase in the quantity and quality (higher completeness and low-contamination)

with respect to previous studies. Our members include objects of sub-stellar masses which we will spectroscopically follow-up

in order to do a spectral classication and search for possible companions.
Arenopontia subterranea Kunz, 1937 sensu Chappuis 1954
Creators: name: Sak, Serdar
name: Karaytuğ, Süphan
name: Huys, Rony
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Copepoda
Harpacticoida
Arenopontiidae
Arenopontia
Arenopontia subterranea

description: Arenopontia subterranea Kunz, 1937 sensu Chappuis (1954b)
Chappuis (1954b) collected Arenopontia specimens in Algeria, Tunisia, the Gulf of Genoa and Catalonia, all of which were attributed to A. subterranea. His brief description (Chappuis 1954b: 267–268; Figs 40–45) provides illustrations of P1, P2–P4 endopods and the P5 of both sexes. The presence of a strong spinule near the outer distal corner as the only spinular ornamentation of P1 enp-1 rules out conspecificity with any of the species listed in Group I (Table 1), including A. subterranea. This is corroborated by the extraordinary length of the segment, being 11 times as long as wide and 2.5 times the length of the exopod. The number of armature elements (four) on the fifth leg relates Chappuis’s (1954b) material to either A. gunduzi sp. nov. or A. nesaie, the latter being closest in terms of enp-1/exp length ratio (2.0). Although there is a general resemblance in P5 morphology (both sexes), other characters such as the longer P2–P3 enp-2 and the unequal terminal elements (outer one half the length of inner one) on P4 enp-2 suggest that Chappuis’s (1954b) specimens are not A. nesaie but possibly belong to another, as yet unidentified, species or an amalgam of species. The presence/absence of the dorsal caudal ramus spur and the condition of the male P6 remain unconfirmed.
description: Published as part of Sak, Serdar, Karaytuğ, Süphan & Huys, Rony, 2024, A revision of the genus Arenopontia Kunz, 1937 (Copepoda, Harpacticoida, Arenopontiidae), including the description of five new species, pp. 1-50 in Zootaxa 5433 (1) on page 39, DOI: 10.11646/zootaxa.5433.1.1, http://zenodo.org/record/10953646
2XMM J083026+524133: The most X-ray luminous cluster at redshift 1
Creators: name: Lamer, G.
name: Hoeft, M.
name: Kohnert, J.
name: Schwope, A.
name: Storm, J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In the distant universe X-ray luminous clusters of galaxies are rare objects. Large area surveys are therefore needed to probe the high luminosity end of the cluster population at redshifts z >= 1. We correlated extended X-ray sources from the second XMM-Newton source catalogue (2XMM) with the SDSS in order to identify new clusters of galaxies. Distant cluster candidates in empty SDSS fields were imaged in the R and z bands with the Large Binocular Telescope. We extracted the X-ray spectra of the cluster candidates and fitted thermal plasma models to the data. We determined the redshift 0.99 +-0.03 for 2XMM J083026+524133 from its X-ray spectrum. With a bolometric luminosity of 1.8 x 10^45 erg/sec this is the most X-ray luminous cluster at redshifts z >= 1. We measured a gas temperature of 8.2 +- 0.9 keV and and estimate a cluster mass M(500) = 5.6 x 10^14 M(solar). The optical imaging revealed a rich cluster of galaxies.
description: New version, as accepted for publication in Astronomy & Astrophysics
Early-type galaxies in the near-infrared: 1.5-2.4\mum spectroscopy
Creators: name: Cesetti, M.
name: Ivanov, V. D.
name: Morelli, L.
name: Pizzella, A.
name: Buson, L.
name: Corsini, E. M.
name: Bontà, E. Dalla
name: Stiavelli, M.
name: Bertola, F.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Near-infrared (hereafter NIR) data may provide complementary information to the traditional optical population synthesis analysis of unresolved stellar populations because the spectral energy distribution of the galaxies in the 1-2.5\mum range is dominated by different types of stars than at optical wavelengths. Furthermore, NIR data are subjected to less absorption and hence could constrain the stellar populations in dust-obscured galaxies. We want to develop observational constraints on the stellar populations of unresolved stellar systems in the NIR. To achieve this goal we need a benchmark sample of NIR spectra of ``simple'' early-type galaxies, to be used for testing and calibrating the outputs of population synthesis models. We obtained low-resolution (R~1000) long-slit spectra between 1.5 and 2.4\mum for 14 nearby early-type galaxies using SofI at NTT and higher resolution (R~3000) long-slit spectra, centered at the MgI at ~1.51\mum for a heterogeneous sample of 5 nearby galaxies observed with ISAAC at VLT. We defined spectral indices for CO, NaI, CaI and MgI features and measured the strengths of these features in the sample galaxies. We defined a new global NIR metallicity index, suitable for abundance measurements in low-resolution spectra. Finally, we present an average NIR spectrum of an early-type galaxy, built from a homogenized subset of our sample. The NIR spectra of the sample galaxies show great similarity and the strength of some features does correlate with the iron abundance [Fe/H] and optical metal features of the galaxies. The data suggest that the NIR metal features, in combination with a hydrogen absorption feature may be able to break the age-metallicity degeneracy just like the Mg and Fe features in the optical wavelength range.
description: 11pages, 11 figures, accepted for publication in A&A
Divergence equations and uniqueness theorem of static spacetimes with conformal scalar hair
Creators: name: Shinohara, Takeshi
name: Tomikawa, Yoshimune
name: Izumi, Keisuke
name: Shiromizu, Tetsuya
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 reexamine the Israel-type proof of the uniqueness theorem of the static spacetime outside the photon surface in the Einstein-conformal scalar system. We derive in a systematic fashion a new divergence identity which plays a key role in the proof. Our divergence identity includes three parameters, allowing us to give a new proof of the uniqueness.
description: 8pages
Ocean Connections from the Arctic across the globe (Event at COP26)
Creators: name: Berx, Bee
name: Payne, Mark
name: Høyer, Jacob
name: Keenlyside, Noel
name: Reigstad Marit
name: Henley, Sian
Publisher: name: Zenodo
Year: 2021

description: Ocean, Climate, Arctic: A one-hour “workshop” at COP26, in the Nordic Pavilion in Glasgow & virtual About this event This workshop will explore the importance of the ocean in the global and north west European climate, the need to ensure we are measuring the strength of ocean currents and the ocean’s properties, and how this information can be incorporated into climate models, climate services and decision-making at national and international levels. Speakers: Bee Berx (Scottish Government) Mark Payne (Danish Meteorological Institute) Jacob Høyer (Danish Meteorological Institute, GHRSST Group for High Resolution Sea Surface Temperature) Noel Keenlyside (Bjerknes Centre for Climate Research, University of Bergen) Marit Reigstad (UiT the Arctic University of Norway) Siân Henley (University of Edinburgh) Finlo Cottier (Scottish Association for Marine Science) Streaming page: https://youtu.be/fJ31QC4uIcw Organizer: Scottish Government, with the support of Blue-Action (H2020) and GHRSST (Copernicus) Venue: Nordic Pavilion in Glasgow & virtual. SEC Centre, Hall 4, Exhibition Way, Glasgow, G3 8YW, United Kingdom
Cosmological Kaluza-Klein branes in black brane spacetimes
Creators: name: Minamitsuji, Masato
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We discuss the comsological evolution of a brane in the $D(>6)$-dimensional black brane spacetime in the context of the Kaluza-Klein (KK) braneworld scheme, i.e., to consider KK compactification on the brane. The bulk spacetime is composed of two copies of a patch of $D$-dimensional black three-brane solution. The near-horizon geometry is given by $AdS_{5}\times S^{(D-5)}$ while in the asymptotic infinity the spacetime approaches $D$-dimensional Minkowski. We consider the brane motion from the near-horizon region toward the spatial infinity, which induces cosmology on the brane. As is expected, in the early times, namely when the brane is located in the near-horizon region, the effective cosmology on the brane coincides with that in the second Randall-Sundrum (RS II) model. Then, the brane cosmology starts to deviate from the RS type one since the dynamics of KK compactified dimensions becomes significant. We find that the brane Universe cannot reach the asymptotic infinity, irrespectively of the components of matter on the brane.
description: 7 pages, 2 figures, references added,the version which will appear in PLB
Investigating the Trade-off between Infections and Social Interactions Using a Compact Model of Endemic Infections on Networks
Creators: name: Thatchai, Bunlang
name: Overton, Christopher E.
name: House, Thomas
Publisher: name: arXiv
Year: 2024
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Physical sciences
subject: FOS: Biological sciences
subject: 92D30, 05C80, 34A45

description: In many epidemiological and ecological contexts, there is a trade-off between infections and interactions. This arises because the links between individuals capable of spreading infections are also often associated with beneficial activities. Here, we consider how the presence of explicit network structure changes the optimal solution of a class of infection-interaction trade-offs. In order to do this, we develop and analyse a low-dimensional dynamical system approximating the network SIS epidemic. We find that network structure in the form of heterogeneous numbers of contacts can have a significant impact on the optimal number of contacts that comes out of a trade-off model.
description: 19 pages; 7 figures
Generalized second law in modified theory of gravity
Creators: name: Sadjadi, H. Mohseni
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In the context of modified theory of gravity (f(R) gravity) we try to study the conditions required for validity of the generalized second law.
description: 9 pages, accepted for publication in Phys. Rev. D
Shedding light on the Milky Way rotation curve with Gaia DR2
Creators: name: Crosta, Mariateresa
name: Giammaria, Marco
name: Lattanzi, Mario Gilberto
name: Poggio, Eloisa
Publisher: name: Zenodo
Year: 2019

description: We present the first attempt to apply the relativistic kinematics delivered by Gaia to trace the Milky Way (MW) rotation curves within a general relativistic scenario. In particular; we have tested an axially symmetric, stationary and asymptotically flat Galaxy-scale metric. The mass inside a large portion of the Galaxy, far away from the central bulk, has been simplified as a pressure-less perfect fluid avoiding the bulge where resides the axis of symmetry.

The study of the rotation curve profile of our Galaxy required the selection of the most suitable stellar tracers of the bulk circular velocity around the galactic center. We selected DR2 sources according to the requirements for a proper 6-dimensional reconstruction of the phase-space location occupied by each individual star as derived by the same observer. The relativistic fit to the MW rotational data has been compared with well-studied classical models for the MW (MWC), which is comprised of a bulge, a stellar thin and thick disk and a Navarro-Frenk-White (NFW) dark matter (DM) halo. To quantitatively asses this comparison, a Monte Carlo Markov Chain (MCMC) analysis has been done.

For the likelihood analysis, the relativistic and the MWC models appear almost identically consistent with the data. Nevertheless, as for the local baryonic matter density estimated via the 00-term of then Einstein field equation, we have obtained a value that is perfectly in line with current independent estimates, which implies no need of extra-mass.
Sub-Millimeter-Scale Measurement of Local Convective Heat Transfer Coefficient Exceeding 100 W/(m^2-K) Using an Optical Pump-Probe Method
Creators: name: Chen, Tao
name: Jiang, Puqing
Publisher: name: arXiv
Year: 2024
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Conventional methods for measuring the local convective heat transfer coefficient (h_c) often rely on simplifying assumptions that can compromise accuracy. Pump-probe methods like time-domain thermoreflectance (TDTR) avoid these assumptions but are limited to h_c values larger than 30 kW/(m^2-K) due to modulation frequency constraints. This study introduces an optical-based Square-Pulsed Source (SPS) method, expanding the frequency range from 10 MHz to 1 Hz, enabling measurements of h_c values above 100 W/(m^2-K) with uncertainties under 10%. The efficacy of the SPS method is demonstrated through measurements of local h_c in an impingement heat transfer process with a single round gas jet. The local Nusselt number distribution is compared with existing literature correlations, offering insights into convective heat transfer phenomena. This study presents a novel tool for measuring local intrinsic convective heat transfer coefficients, enhancing the understanding of local convective heat transfer.
Hamiltonian thermodynamics of charged three-dimensional dilatonic black holes
Creators: name: Dias, Gonçalo A. S.
name: Lemos, José P. S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The action for a class of three-dimensional dilaton-gravity theories, with an electromagnetic Maxwell field and a cosmological constant, can be recast in a Brans-Dicke-Maxwell type action, with its free $ω$ parameter. For a negative cosmological constant, these theories have static, electrically charged, and spherically symmetric black hole solutions. Those theories with well formulated asymptotics are studied through a Hamiltonian formalism, and their thermodynamical properties are found. The theories studied are general relativity, a dimensionally reduced cylindrical four-dimensional general relativity theory, and a theory representing a class of theories, all with a Maxwell term. The Hamiltonian formalism is setup in three dimensions through foliations on the right region of the Carter-Penrose diagram, with the bifurcation 1-sphere as the left boundary, and anti-de Sitter infinity as the right one. The metric functions on the hypersurfaces and the radial component of the vector potential one-form are the canonical coordinates. The Hamiltonian action is written, the Hamiltonian being a sum of constraints. One finds a new action which yields an unconstrained theory with two pairs of canonical coordinates ${M,P_M; Q,P_Q}$, where $M$ is the mass parameter, which needs renormalization, $P_M$ its conjugate momenta, $Q$ is the charge parameter, and $P_Q$ its conjugate momentum. The resulting Hamiltonian is a sum of boundary terms only. A quantization of the theory is performed. The Schrödinger evolution operator is constructed, the trace is taken, and the partition function of the grand canonical ensemble is obtained, the chemical potential being the electric potential. The charged black hole entropies differ, in general, from the usual quarter of the horizon area due to the dilaton.
description: 38 pages, 3 figures
Decoupling Thermal Properties in Multilayer Systems for Advanced Thermoreflectance Techniques
Creators: name: Chen, Tao
name: Jiang, Puqing
Publisher: name: arXiv
Year: 2024
Subjects: subject: Applied Physics (physics.app-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Thermoreflectance techniques, including time-domain thermoreflectance (TDTR), frequency-domain thermoreflectance (FDTR), and the square-pulsed source (SPS) method, are powerful tools for characterizing the thermal properties of bulk and thin-film materials. However, accurately interpreting their signals remains challenging due to intricate interdependencies among experimental variables. This study introduces a systematic framework based on singular value decomposition (SVD) to decouple these interdependent parameters and enhance the reliability of thermal property extraction. By applying SVD to the sensitivity matrix, we identify key parameter combinations and establish essential dimensionless numbers that govern thermoreflectance signals. The framework is applied to a GaN/Si heterostructure, where the performance of TDTR, FDTR, and SPS is evaluated and compared. The results demonstrate a high degree of consistency across all three techniques. Notably, with the intricate relationships of parameters unraveled, TDTR, FDTR, and SPS demonstrate significant potential to simultaneously and accurately extract five to seven key thermal properties, including thermal conductivity, heat capacity, and interfacial thermal conductance of the GaN/Si multilayer system. This framework not only improves the precision of thermoreflectance measurements but also lays a foundation for advanced thermal metrology in research and industrial applications.
Gravitational Memory and Compact Extra Dimensions
Creators: name: Ferko, Christian
name: Satishchandran, Gautam
name: Sethi, Savdeep
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We develop a general formalism for treating radiative degrees of freedom near $\mathscr{I}^{+}$ in theories with an arbitrary Ricci-flat internal space. These radiative modes are encoded in a generalized news tensor which decomposes into gravitational, electromagnetic, and scalar components. We find a preferred gauge which simplifies the asymptotic analysis of the full nonlinear Einstein equations and makes the asymptotic symmetry group transparent. This asymptotic symmetry group extends the BMS group to include angle-dependent isometries of the internal space. We apply this formalism to study memory effects, which are expected to be observed in future experiments, that arise from bursts of higher-dimensional gravitational radiation. We outline how measurements made by gravitational wave observatories might probe properties of the compact extra dimensions.
description: 74 pages, 2 figures; minor typos corrected and references added
Zero temperature phase diagram of a d-wave superconductor with Anderson impurities
Creators: name: Borkowski, L. S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the model of a d-wave superconductor interacting with finite concentration of Anderson impurities at zero temperature. The interaction between impurity and conduction electrons is taken into account within the large-$N$ approximation. We discuss the obtained phase diagram and its dependence on the main energy scales.
description: 5 pages, 3 figures, Physics of Magnetism 2008 proceedings
Ground state heavy tetraquark production in heavy quark fragmentation
Creators: name: Nejad, S. Mohammad Moosavi
name: Amiri, Nahid
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: During recent years, the study of exotic hadrons including tetraquarks and pentaquarks has attracted a lot of interests and more studies are in progress experimentally and theoretically. It is well-known that at sufficiently large transverse momentum the dominant production mechanism for standard heavy hadrons (mesons/baryons) is actually the fragmentation so that the same mechanism is also proposed for the production of heavy exotic hadrons. This work is the first attempt to study the direct fragmentation of a heavy quark into ground state heavy tetraquarks in leading order of perturbative QCD. In this regard, we will present an exact analytical expression for the fragmentation production of neutral hidden flavor tetraquarks $(Qq\bar{Q}\bar{q})$ which includes most of the kinematical and dynamical properties of the process.
description: The manuscript includes 8 pages and 3 figures. Accepted to be published in Physical Review D (2022)
Superconducting Gap and Pseudogap in Sm(O$_{1-x}$F$_x$)FeAs Layered Superconductor from Photoemission Spectroscopy
Creators: name: Liu, Haiyun
name: Jia, Xiaowen
name: Zhang, Wentao
name: Zhao, Lin
name: Meng, Jianqiao
name: Liu, Guodong
name: Dong, Xiaoli
name: Wu, G.
name: Liu, R. H.
name: Chen, X. H.
name: Ren, Z. A.
name: Yi, Wei
name: Che, G. C.
name: Chen, G. F.
name: Wang, N. L.
name: Wang, Guiling
name: Zhou, Yong
name: Zhu, Yong
name: Wang, Xiaoyang
name: Zhao, Zhongxian
name: Xu, Zuyan
name: Chen, Chuangtian
name: Zhou, X. J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: High resolution photoemission measurements have been carried out on non-superconducting SmOFeAs parent compound and superconducting Sm(O$_{1-x}$F$_x$)FeAs (x=0.12, and 0.15) compounds. The momentum-integrated spectra exhibit a clear Fermi cutoff that shows little leading-edge shift in the superconducting state which suggests the Fermi surface sheet(s) around the $Γ$ point may not be gapped in this multiband superconductors. A robust feature at 13 meV is identified in all these samples. Spectral weight suppression near E$_F$ with decreasing temperature is observed in both undoped and doped samples that points to a possible existence of a pseudogap in these Fe-based compounds.
description: 4 pages, 4 figures
Consequences Of Fully Dressing Quark-Gluon Vertex Function With Two-Point Gluon Lines
Creators: name: Matevosyan, Hrayr H.
name: Thomas, Anthony W.
name: Tandy, Peter C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We extend recent studies of the effects of quark-gluon vertex dressing upon the solutions of the Dyson-Schwinger equation for the quark propagator. A momentum delta function is used to represent the dominant infrared strength of the effective gluon propagator so that the resulting integral equations become algebraic. The quark-gluon vertex is constructed from the complete set of diagrams involving only 2-point gluon lines. The additional diagrams, including those with crossed gluon lines, are shown to make an important contribution to the DSE solutions for the quark propagator, because of their large color factors and the rapid growth in their number.
A Framework for Adapting Human-Robot Interaction to Diverse User Groups
Creators: name: Rosin, Theresa Pekarek
name: Hassouna, Vanessa
name: Sun, Xiaowen
name: Krohm, Luca
name: Kordt, Henri-Leon
name: Beetz, Michael
name: Wermter, Stefan
Publisher: name: arXiv
Year: 2024
Subjects: subject: Robotics (cs.RO)
subject: Computation and Language (cs.CL)
subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: To facilitate natural and intuitive interactions with diverse user groups in real-world settings, social robots must be capable of addressing the varying requirements and expectations of these groups while adapting their behavior based on user feedback. While previous research often focuses on specific demographics, we present a novel framework for adaptive Human-Robot Interaction (HRI) that tailors interactions to different user groups and enables individual users to modulate interactions through both minor and major interruptions. Our primary contributions include the development of an adaptive, ROS-based HRI framework with an open-source code base. This framework supports natural interactions through advanced speech recognition and voice activity detection, and leverages a large language model (LLM) as a dialogue bridge. We validate the efficiency of our framework through module tests and system trials, demonstrating its high accuracy in age recognition and its robustness to repeated user inputs and plan changes.
description: Published in the Proceedings of the 16th International Conference on Social Robotics (ICSR) 2024