cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Anisotropic AGN Outflows and Enrichment of the Intergalactic Medium. II. Metallicity
Creators: name: Barai, Paramita
name: Martel, Hugo
name: Germain, Joel
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We investigate the large-scale influence of outflows from AGNs in enriching the IGM with metals in a cosmological context. We combine cosmological simulations of large scale structure formation with a detailed model of metal enrichment, in which outflows expand anisotropically along the direction of least resistance, distributing metals into the IGM. The metals carried by the outflows are generated by two separate stellar populations: stars located near the central AGN, and stars located in the greater galaxy. Using this algorithm, we performed a series of 5 simulations of the propagation of AGN-driven outflows in a cosmological volume of size (128/h Mpc)^3 in a Lambda-CDM universe, and analyze the resulting metal enrichment of the IGM. We found that the metallicity induced in the IGM is greatly dominated by AGNs having bolometric luminosity L > 10^9 L_sun, sources with 10^8 < L / L_sun < 10^9 having a negligible contribution. Our simulations produced an average IGM metallicity of [O/H] = -5 at z = 5.5, which then rises gradually, and remains relatively flat at a value [O/H] = -2.8 between z = 2 and z = 0. The ejection of metals from AGN host galaxies by AGN-driven outflows is found to enrich the IGM to > 10 - 20% of the observed values, the number dependent on redshift. The enriched IGM volume fractions are small at z > 3, then rise rapidly to the following values at z = 0: 6 - 10% of the volume enriched to [O/H] > -2.5, 14 - 24% volume to [O/H] > -3, and 34 - 45% volume to [O/H] > -4. At z > 2, there is a gradient of the induced enrichment, the metallicity decreasing with increasing IGM density, enriching the underdense IGM to higher metallicities, a trend more prominent with increasing anisotropy of the outflows. This can explain observations of metal-enriched low-density IGM at z = 3 - 4.
description: 18 pages, 12 figures, submitted
LIBRA Poster campaign on the importance of a balanced lifestyle and gender equality
Creators: name: Smythe, Cheryl
Publisher: name: Zenodo
Year: 2019
Subjects: Gender Equality, Work Life Balance, Awareness Campaign

description: These posters can be used to increase the awareness of the importance of a balance lifestyle for men and women, enabling men to share more of the caring responsibilities traditionally taken on by women. The posters are accompanied by social media cards.
Tracing and situating water resilience across scales
Creators: name: Rodina, Lyudmila (Lucy) Alekseeva
Publisher: name: University of British Columbia
Year: 2018

description: Under increasing urbanization and climate change impacts, many cities today are facing higher risks of water scarcity, flooding, or water pollution. Building resilience in the water sector is widely recognized as a key objective across scales—from global to local. However, there remain key gaps in theoretical and empirical understanding of how resilience thinking is to be applied in the context of water systems and water governance. In addressing these gaps, this dissertation draws on several methods to theorize and develop a situated understanding of “water resilience”—attentive to specific biophysical environments, socio-political contexts, and lived experiences. I first provide a comprehensive overview of how resilience ideas articulate with contemporary thinking in water governance and water resource management (Chapter 2). I find that the resilience-informed water governance literature remains fragmented and predominantly centered on conventional approaches and framings. It thus still lacks integrative or innovative approaches that encompass the various dimensions of the water system. However, I also find that while debates about how to theorize or operationalize resilience in relation to different systems—social or biophysical—may be unresolved, defining resilience is likely not a key factor in how experts think it should be operationalized (Chapter 3). Instead, realizing resilience involves focusing on the trade-offs, tensions and conflicts that arise from resilience building efforts in different contexts. I draw on evidence from fieldwork in Cape Town to document and compare different water resilience framings and to critically examine their implications in the context of Cape Town’s municipal water management. I find that various notions of water resilience co-exist in tension with each other and with resilience frameworks imposed by external actors. Situating these resilience debates in Cape Town’s marginalized urban spaces further demonstrates that these sites are central to urban social-hydrological resilience despite being physically located at the periphery. These results reveal conflicts and disconnections that inhibit socio-hydrological resilience in Cape Town. Ultimately, this dissertation argues that water resilience is a fruitful boundary concept whose application, however, requires unpacking and addressing fragmented governance processes, power and inequality.
Influence of s,p-d and s-p exchange couplings on exciton splitting in (Zn,Mn)O
Creators: name: Pacuski, W.
name: Suffczynski, J.
name: Osewski, P.
name: Kossacki, P.
name: Golnik, A.
name: Gaj, J. A.
name: Deparis, C.
name: Morhain, C.
name: Chikoidze, E.
name: Dumont, Y.
name: Ferrand, D.
name: Cibert, J.
name: Dietl, T.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: This work presents results of near-band gap magnetooptical studies on (Zn,Mn)O epitaxial layers. We observe excitonic transitions in reflectivity and photoluminescence, that shift towards higher energies when the Mn concentration increases and split nonlinearly under the magnetic field. Excitonic shifts are determined by the s,p-d exchange coupling to magnetic ions, by the electron-hole s-p exchange, and the spin-orbit interactions. A quantitative description of the magnetoreflectivity findings indicates that the free excitons A and B are associated with the Gamma_7 and Gamma_9 valence bands, respectively, the order reversed as compared to wurtzite GaN. Furthermore, our results show that the magnitude of the giant exciton splittings, specific to dilute magnetic semiconductors, is unusual: the magnetoreflectivity data is described by an effective exchange energy N_0(beta-alpha)=+0.2+/-0.1 eV, what points to small and positive N_0 beta. It is shown that both the increase of the gap with x and the small positive value of the exchange energy N_0 beta corroborate recent theory describing the exchange splitting of the valence band in a non-perturbative way, suitable for the case of a strong p-d hybridization.
description: 8 pages, 8 figures
Cavity enhancement of V2 centers in 4H-SiC with a fiber-based Fabry-Pérot microcavity
Creators: name: Hessenauer, Jannis
name: Körber, Jonathan
name: Ghezellou, Misagh
name: Ul-Hassan, Jawad
name: Astakhov, Georgy V.
name: Knolle, Wolfgang
name: Wrachtrup, Jörg
name: Hunger, David
Publisher: name: arXiv
Year: 2025
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Silicon vacancy centers in 4H-silicon carbide (SiC) host a long-lived electronic spin and simultaneously possess spin-resolved optical transitions, making them a great candidate for implementing a spin-photon interface. These interfaces are an important building block of quantum networks, which in turn promise to enable secure communication and distributed quantum computing. To achieve this goal, the rate of coherently scattered photons collected from a single emitter needs to be maximized, which can be achieved by interfacing the emitter with an optical cavity. In this work, we integrate V2 centers inside a SiC membrane into a fiber-based Fabry-Pérot microcavity. We find that SiC lends itself well to membrane fabrication, as evidenced by low surface roughness $σ_{\mathrm{RMS}}$ ~ 400 pm, high reproducibility, and consequentially a high cavity finesse F ~ 40 000. At cryogenic temperatures, we observe individual emitters coupling to cavity modes. We confirm their single-emitter character by measuring the second-order autocorrelation function and investigate the Purcell factor by measuring the optical lifetime as a function of the cavity-emitter detuning. We find a 13.3-fold enhancement of photons scattered into the zero-phonon line (ZPL), which could be further increased by using optimized mirror coatings, potentially opening the path towards deterministic spin-photon interaction.
Phase diagram of an extended classical dimer model
Creators: name: Charrier, D.
name: Alet, F.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present an extensive numerical study of the critical behavior of dimer models in three dimensions, focusing on the phase transition between Coulomb and crystalline columnar phases. The case of attractive interactions between parallel dimers on a plaquette was shown to undergo a continuous phase transition with critical exponents close to those of the O(N) tricritical universality class, a situation which is not easily captured by conventional field theories. That the dimer model is exactly fine-tuned to a highly symmetric point is a non trivial statement which needs careful numerical investigation. In this paper, we perform an extensive Monte Carlo study of a generalized dimer model with plaquette and cubic interactions and determine its extended phase diagram. We find that when both interactions favor alignment of the dimers, the phase transition is first order, in almost all cases. On the opposite, when interactions compete, the transition becomes continuous, with a critical exponent η~ 0.2. The existence of a tricritical point between the two regimes is confirmed by simulations on very large size systems and a flowgram method. In addition, we find a highly-degenerate crystalline phase at very low temperature in the frustrated regime which is separated from the columnar phase by a first order transition.
description: 12 pages, 13 figures
Badhamia capsulifera Berk., Proc. Linn. Soc. London
Creators: name: Treviño-Zevallos, Italo
name: García-Cunchillos, Iván
name: Basanta, Diana Wrigley De
name: Lado, Carlos
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Protozoa
Mycetozoa
Myxomycetes
Physarales
Physaraceae
Badhamia
Badhamia capsulifera

description: 11. Badhamia capsulifera (Bull.) Berk., Proc. Linn. Soc. London 2: 200 (1852)
 Specimen examined. PERU. Tacna: Tacna, Chulpapalca, route PE-40, km 63,700, east of Palca, 3220 m, 17º46′07.2”S, 69º56′23.7”W, 5 Oct 2012, debris of Corryocactus brevistylus, Lado 22105a (MA-Fungi 94700).
 Notes. Peruvian specimens matched the description of the species, but some sporocarps present a well-developed stalk. According to Martin & Alexopoulos (1969) and Nannenga-Bremekamp (1991), the development of stalks is unusual in this species and, when present, generally membranous and reduced as an extension of the hypothallus.
description: Published as part of Treviño-Zevallos, Italo, García-Cunchillos, Iván, Basanta, Diana Wrigley De & Lado, Carlos, 2023, Diversity of Myxomycetes from Peru Part III: The high Andes and the altiplano, pp. 1-92 in Phytotaxa 624 (1) on pages 11-12, DOI: 10.11646/phytotaxa.624.1.1, http://zenodo.org/record/10150721
Pressure dependence of the dielectric loss in semi-conducting polypyrrole aged at room temperature
Creators: name: Sakellis, I.
name: Papathanassiou, A. N.
name: Grammatikakis, J.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The effect of physical aging of semi-conducting polypyrrole at ambient temperature for two years duration on the dielectric loss at various pressures is investigated. Changes of the dielectric loss spectra and the modification of the values of the activation volume for relaxation are interpreted through the division of chain clusters into smaller components and the reduction of the size of the conductive grains.
description: Synthetic Metals (in print)
title: Eglise Saint Jean d'Abbetot
Creators: name: CEPAO
name: Delamare, Ségolène
name: Trajectoires UMR 8215
Publisher: name: Archeovision
Year: 2023
Subjects: subject: archéologie du bâti
subject: photogrammétrie

description: Modele 3D de l'eglise Saint Jean Abbetot et de sa crypte (interieur/exterieur)
Badhamia crassipella K. D. Whitney & H. W. Keller, Mycologia
Creators: name: Treviño-Zevallos, Italo
name: García-Cunchillos, Iván
name: Basanta, Diana Wrigley De
name: Lado, Carlos
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Protozoa
Mycetozoa
Myxomycetes
Physarales
Physaraceae
Badhamia
Badhamia crassipella

description: 12. ºBadhamia  crassipella K.D. Whitney & H.W. Keller, Mycologia 74(4): 620 (1982)
 Specimens examined. PERU. Cajamarca: Cajamarca, Encañada, route PE-08B, km 220, 10 km east of Encañada towards Abra Gran Chimú, 3437 m, 7º03′14.0”S, 78º19′32.8”W, 14 Apr 2013, leaves and branches of Asteraceae, Lado 22559 (MA-Fungi 94902, USM). Junin: Concepción, Chambara, route PE-24, km 251, 6 km west of Roncha, 3435 m, 11º59′54”S, 75º27′31”W, 28 Apr 2017, leaves of Puya ferruginea, Lado 25534 (MA-Fungi 96692). Huancayo, Pucara, route PE-3SC, km 7, 7 km from Pucara, Sapallanga, 3837 m, 12º13′03”S, 75º06′59”W, 26 Apr 2017, leaf litter and twigs, Lado 25352b (MA-Fungi 96514), leaf litter and bryophytes, Lado 25354 (MA-Fungi 96516). Huancayo, route 108, km 10, 8 km southwest of Acopalca, 3505 m, 12º00′18”S, 75º09′38”W, 27 Apr 2017, leaves of Puya sp., Lado 25461 (MA-Fungi 96614), Lado 25463 (MA-Fungi 96616). Pasco: Pasco, Huariaca, Batanchaca, route PE-3N, km. 163, 3053 m, 10º28′34”S, 76º10′49”W, 18 May 2018, leaf litter and woody debris, Lado 26945 (MA-Fungi 97697), leaf of Tillandsia sp., Lado 26951 (MA-Fungi 97703).
 Notes. This species differs from others in the genus with clustered spores by a thick and triple-layered peridium with a smooth outer layer. The plamsodiocarpic sporophores predominate, and so it is similar to Physarum bogoriense Racib, but the clustered spores and the badhamioid capillitium reveal its ascription to Badhamia. The species was described from the U.S. A in California and Washington by Whitney & Keller (1982) and considered a rare species by Schnittler & Stephenson (2000). The specimens collected represent the first record for South America and the Neotropics. It has been found in the departments of Cajamarca, Junin and Pasco, inhabiting the leaf litter and woody remains of the high Andean scrub, the Puya stands, and the vegetation associated with crops.
description: Published as part of Treviño-Zevallos, Italo, García-Cunchillos, Iván, Basanta, Diana Wrigley De & Lado, Carlos, 2023, Diversity of Myxomycetes from Peru Part III: The high Andes and the altiplano, pp. 1-92 in Phytotaxa 624 (1) on page 12, DOI: 10.11646/phytotaxa.624.1.1, http://zenodo.org/record/10150721
Model-Based Clustering of Nonparametric Weighted Networks With Application to Water Pollution Analysis
Creators: name: Agarwal, Amal
name: Xue, Lingzhou
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Computational Biology

description: Water pollution is a major global environmental problem, and it poses a great environmental risk to public health and biological diversity. This work is motivated by assessing the potential environmental threat of coal mining through increased sulfate concentrations in river networks, which do not belong to any simple parametric distribution. However, existing network models mainly focus on binary or discrete networks and weighted networks with known parametric weight distributions. We propose a principled nonparametric weighted network model based on exponential-family random graph models and local likelihood estimation, and study its model-based clustering with application to large-scale water pollution network analysis. We do not require any parametric distribution assumption on network weights. The proposed method greatly extends the methodology and applicability of statistical network models. Furthermore, it is scalable to large and complex networks in large-scale environmental studies. The power of our proposed methods is demonstrated in simulation studies and a real application to sulfate pollution network analysis in Ohio watershed located in Pennsylvania, United States.
Repulsive interatomic potentials calculated at three levels of theory
Creators: name: Nordlund, Kai
name: Lehtola, Susi
name: Hobler, Gerhard
Publisher: name: arXiv
Year: 2025
Subjects: subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: The high-energy repulsive interaction between nuclei at distances much smaller than the equilibrium bond length is the key quantity determining the nuclear stopping power and atom scattering in keV and MeV radiation events. This interaction is traditionally modeled within orbital-free density functional theory with frozen atomic electron densities, following the Ziegler-Biersack-Littmark (ZBL) model. In this work, we calculate atom pair specific repulsive interatomic potentials with the ZBL model, and compare them to two kinds of quantum chemical calculations - second-order Møller-Plesset perturbation theory in flexible Gaussian basis sets as well as density functional theory with numerical atomic orbital basis sets - which go well beyond the limitations in the ZBL model, allowing the density to relax in the calculations. We show that the repulsive interatomic potentials predicted by the two quantum chemical models agree within $\sim$ 1% for potential energies above 30 eV, while the ZBL pair-specific potentials and universal ZBL potentials differ much more from either of these calculations. We provide new pair-specific fits of the screening functions in terms of 3 exponentials to the calculations for all pairs $Z_1$-$Z_2$ for $1 \leq Z_i \leq 92$, and show that they agree within $\sim 2$% with the raw data. We use the new potentials to simulate ion implantation depth profiles in single crystalline Si and show very good agreement with experiment. However, we also show that under channeling conditions, the attractive part of the potential can affect the depth profiles. The full data sets of all the calculated interatomic potentials as well as analytic fits to the data are shared as open access.
description: 27 pages, 22 figures; now with correct Fig 12 caption
The psychology of everyday sadism
Creators: name: Buckels, Erin Evelyn
Publisher: name: University of British Columbia
Year: 2018

description: Although psychological conceptions of sadism have traditionally viewed it as a clinical-forensic disorder, there is emerging scientific interest in the view that sadism extends to the normal range of personality. Sadistic personality is defined as an enduring tendency to enjoy cruelty toward others. To capture the full scope of this trait, I constructed and validated a self-report questionnaire—the Comprehensive Assessment of Sadistic Tendencies (CAST)—designed to assess three overlapping, but distinct facets of sadism, covering enjoyment of physical violence, verbal aggression, and violent media consumption. As part of the psychometric evaluation and validation process (Chapter 2), I administered the CAST to multiple samples of university students and community adults (total N = 5,553). Results from exploratory and confirmatory factor analyses supported the CAST’s three-factor structure. The instrument produced excellent internal consistency and test-retest reliability estimates. Overall CAST scores were positively associated with other malevolent traits (including aggression and the Dark Triad of personality: psychopathy, narcissism, and Machiavellianism), and negatively associated with prosocial traits such as empathy. Convergent validity was demonstrated by high correlations between CAST scores and those of alternative unidimensional sadism measures. Discriminant validity was evident in the CAST’s lack of association with theoretically unrelated constructs such as emotional stability. Subsequent research (Chapters 3-5) demonstrated the predictive and incremental validity of the CAST, including the unique contributions of the three subscales. In Chapter 3 (total N = 2,779), sadism was a strong positive predictor of online trolling behavior (which was, in turn, distinguishable from cyberbullying). In Chapter 4 (N = 412), sadism predicted a pattern of inaccurate and negative interpersonal perceptions, with effects emerging for both sadistic perceivers and sadistic targets. In Chapter 5 (total N = 540), sadism predicted tendencies to underestimate others’ suffering and minimize culpability for harm; both effects were statistically explained by positive affect. Taken together, the results support the construct validity of sadistic personality, and the inclusion of sadism in new “Dark Tetrad” of personality.
Electromagnetically Induced Transparency with Quantized Fields in Optocavity Mechanics
Creators: name: Huang, Sumei
name: Agarwal, G. S.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We report electromagnetically induced transparency using quantized fields in optomechanical systems. The weak probe field is a narrow band squeezed field. We present a homodyne detection of EIT in the output quantum field. We find that the EIT dip exists even though the photon number in the squeezed vacuum is at the single photon level. The EIT with quantized fields can be seen even at temperatures of the order of 100 mK paving the way for using optomechanical systems as memory elements.
description: 6 pages, 5 figures
Performance of 35-Pound Fiberboard Boxes Jumble-Packed with Peaches and Nectarines
Creators: name: Rij, Roger E.
name: Rij, Roger E.
Publisher: name: Unknown
Year: 1977
Subjects: subject: Crop Production/Industries
subject: Marketing
subject: FOS: Economics and business
subject: Research and Development/Tech Change/Emerging Technologies
subject: Peaches
subject: nectarines
subject: shipping containers
subject: marketing unitization
subject: corrugated fiber-board boxes
subject: fruit quality

description: California shipped approximately 18 million boxes of fresh peaches and nectarines in 1975. Seven test shipments were conducted in 1975 to determine if fruit could be shipped successfully in fiberboard boxes with net weights of 35 instead of 25 pounds. We also compared the relative advantages of Bliss-style and tray-style design corrugated fiberboard boxes. During 40 hours of transit, peaches averaged 54° F (12° C) in 25- and 35-pound fiberboard boxes. Nectarines averaged 48° (9° C) in the 25- and 35-pound fiberboard boxes during 96 hours of transit. However, these temperatures were higher than recommended for fruit shipments. All containers were in good condition on arrival, and no significant difference in fruit quality was detected between the fruit packed in the 25-pound fiberboard box or that packed in the 35-pound fiberboard box. About $1.5 million a year could be saved by using 35- instead of 25-pound corrugated fiberboard boxes for peaches or nectarines.
The interparticle interaction and crossover in critical lines on field-temperature plane in Pr$_{0.5}$Sr$_{0.5}$MnO$_{3}$ nanoparticles
Creators: name: Pramanik, A. K.
name: Banerjee, A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The magnetic properties and the effects of interparticle interaction on it have been studied in nanoparticles of half doped Pr$_{0.5}$Sr$_{0.5}$MnO$_{3}$. Three samples consisting of nanoparticles of different average particle sizes are synthesized to render the variation in interparticle interaction. Though all the samples crystallize in the same structure to that of their bulk compound, the low temperature ferromagnetic-antiferromagnetic transition, which is present in bulk compound, is not evident in the nanoparticles. Linear as well as nonlinear ac susceptibility coupled with dc magnetic measurements have shown the superparamagnetic behavior of these nanoparticles where the blocking temperature increases with the increasing particle size. Presence of interparticle interaction is confirmed from the temperature variation of coercive field and the analysis of frequency dependent ac susceptibility. We have identified the nature of this interaction to be of dipolar type, and show that its strength decreases with the increasing particle size. The effect of this dipolar interaction on magnetic properties is intriguing as the compounds exhibit crossover from de Almeida-Thouless to Gabay-Toulouse like critical lines on field-temperature plane above their respective interaction field. In agreement with theoretical prediction, we infer that this crossover is induced by the unidirectional anisotropy arising from interparticle interaction, and this is confirmed from the presence of exchange bias phenomenon.
description: To appear in Phys. Rev. B
Thermodynamic Potential for Superfluid 3He in Aerogel
Creators: name: Ali, Sarosh
name: Zhang, Liangsheng
name: Sauls, J. A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We present a free energy functional for superfluid 3He in the presence of homogeneously distributed impurity disorder which extends the Ginzburg-Landau free energy functional to all temperatures. We use the new free energy functional to calculate the thermodynamic potential, entropy, heat capacity and density of states for the B-phase of superfluid 3He in homogeneous, isotropic aerogel.
description: 10 pages, 4 figures
Simultaneous mapping of the ultrafast time and fluence dependence of the laser-induced insulator-to-metal transition in magnetite
Creators: name: Schunck, J. O.
name: Miedema, P. S.
name: Engel, R. Y.
name: Dziarzhytski, S.
name: Brenner, G.
name: Ekanayake, N.
name: Chang, C. -F.
name: Bougiatioti, P.
name: Döring, F.
name: Rösner, B.
name: David, C.
name: Schüßler-Langeheine, C.
name: Beye, M.
Publisher: name: arXiv
Year: 2025
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Pump-probe methods are a ubiquitous tool in the field of ultrafast dynamic measurements. In recent years, x-ray free-electron laser experiments have gained importance due to their ability to probe with high chemical selectivity and at atomic length scales. Measurements are typically repeated many thousands of times to collect sufficient statistics and vary parameters like delay or fluence, necessitating that initial conditions are restored each time. An alternative is presented by experiments which measure the relevant parameters in a single shot. Here, we present a time-to-space mapping imaging scheme that enables us to record a range of delays and laser fluences in any single shot of the x-ray probe. We demonstrate the use of this scheme by mapping the ultrafast dynamics of the optically induced insulator-to-metal Verwey transition in a magnetite thin film, probed by soft x-ray resonant diffraction. By extrapolating our results toward the conditions found at x-ray free-electron lasers with higher photon energy, we demonstrate that the presented data could be recorded in a single shot.
description: The following article has been submitted to Structural Dynamics. After it is published, it will be found at https://publishing.aip.org/resources/librarians/products/journals/
Real group orbits on flag manifolds
Creators: name: Akhiezer, Dmitri
Publisher: name: arXiv
Year: 2011
Subjects: subject: Complex Variables (math.CV)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 32M10, 14M15

description: In this survey, we gather together various results on the action of a real form of a complex semisimple Lie group on its flag manifolds. We start with the finiteness theorem of J.Wolf implying that at least one of the orbits is open. We give a new proof of the converse statement for real forms of inner type, essentially due to F.M.Malyshev. Namely, if a real semisimple Lie group of inner type has an open orbit on an algebraic homogeneous space of the complexified group then the homogeneous space is a flag manifold. To prove this, we recall, partly with proofs, some results of A.L.Onishchik on the factorizations of reductive groups. Finally, we discuss the cycle spaces of open orbits and define the crown of a symmetric space of non-compact type. With some exceptions, the cycle space agrees with the crown. We sketch a complex analytic proof of this result, due to G.Fels, A.Huckleberry and J.Wolf.
description: 24 pages
Badhamia foliicola Lister, J. Bot.
Creators: name: Treviño-Zevallos, Italo
name: García-Cunchillos, Iván
name: Basanta, Diana Wrigley De
name: Lado, Carlos
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Protozoa
Mycetozoa
Myxomycetes
Physarales
Physaraceae
Badhamia
Badhamia foliicola

description: 13. Badhamia foliicola Lister, J. Bot. 35: 209 (1897)
 Specimens examined. PERU. Ancash: Bolognesi, trail to Pampam town, Aynin bridge, route PE-3N, km 459, 3089 m, 10º07′30”S, 77º09′28”W, 20 May 2014, branches of Baccharis sp., Lado 23654 (MA-Fungi 95330). Huari, Succha, route PE-14A towards Huantar, 3 km at the junction of route AN- 110, 3064 m, 9º27′01”S, 77º11′03”W, 13 May 2018, woody debris, Lado 26492a (MA-Fungi 97276). Cusco: Espinar, Coporaque community, 20 km southwest of Espinar, 3945 m, 14º54′21”S, 71º31′17”W, 23 Apr 2016, leaves and stems of Festuca orthophylla, Lado 24693 (MA-Fungi 95957). Moquegua: Mariscal Nieto, Torata, Pontón Cuellar, route PE-34D, km 69, 3815 m, 16º59′54.8”S, 70º41′54.7”W, 7 Oct 2012, twigs and leaf litter of Baccharis glutinosa, Lado 22164 (MA-Fungi 94705).
description: Published as part of Treviño-Zevallos, Italo, García-Cunchillos, Iván, Basanta, Diana Wrigley De & Lado, Carlos, 2023, Diversity of Myxomycetes from Peru Part III: The high Andes and the altiplano, pp. 1-92 in Phytotaxa 624 (1) on page 12, DOI: 10.11646/phytotaxa.624.1.1, http://zenodo.org/record/10150721
A 0535+26: an X-ray/Optical Tour
Creators: name: Camero-Arranz, A.
name: Finger, M. H.
name: Wilson-Hodge, C. A.
name: Jenke, P.
name: Coe, M. J.
name: Steele, I.
name: Caballero, I.
name: Gutierrez-Soto, J.
name: Kretschmar, P.
name: Suso, J.
name: McBride, V. A.
name: Rodriguez, J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We compiled X-ray and Optical observations of the accreting X-ray binary system A 0535+262 since its discovery in 1975, that will allow us to shed light on the unpredictable behavior of this binary system. We present the data in terms of the Be-disk interaction with the neutron star companion. In addition, we show recent results from the continuous monitoring of this source by the Gamma-ray Burst Monitor(GBM), on board the Fermi observatory, since its launch in 2008 June 11.
description: 4 pages, 5 figures, Conference proceeding of "Astrophysics of Neutron Stars 2010 - a conference in honor of M. Ali Alpar", 2-6 August 2010, Cesme, Izmir, Turkey
A Multifrequency Census of 100 Pulsars below 100 MHz with LWA: A Systematic Study of Flux Density, Spectra, Timing, Dispersion, Polarization, and Its Variation from a Decade of Observations
Creators: name: Kumar, Pratik
name: Taylor, Greg B.
name: Stovall, Kevin
name: Dowell, Jayce
name: White, Stephen M.
Publisher: name: arXiv
Year: 2025
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present a census of 100 pulsars, the largest below 100 MHz, including 94 normal pulsars and six millisecond pulsars, with the Long Wavelength Array (LWA). Pulse profiles are detected across a range of frequencies from 26 to 88 MHz, including new narrow-band profiles facilitating profile evolution studies and breaks in pulsar spectra at low frequencies. We report mean flux density, spectral index, curvature, and low-frequency turnover frequency measurements for 97 pulsars, including new measurements for 61 sources. Multi-frequency profile widths are presented for all pulsars, including component spacing for 27 pulsars with two components. Polarized emission is detected from 27 of the sources (the largest sample at these frequencies) in multiple frequency bands, with one new detection. We also provide new timing solutions for five recently-discovered pulsars. Low-frequency observations with the LWA are especially sensitive to propagation effects arising in the interstellar medium. We have made the most sensitive measurements of pulsar dispersion measures (DMs) and rotation measures (RMs), with median uncertainties of 2.9x10^-4 pc cm^-3 and 0.01 rad m^-2, respectively, and can track their variations over almost a decade, along with other frequency-dependent effects. This allows stringent limits on average magnetic fields, with no variations detected above ~20 nG. Finally, the census yields some interesting phenomena in individual sources, including the detection of frequency and time-dependent DM variations in B2217+47, and the detection of highly circularly polarized emission from J0051+0423.
description: Accepted for publication in ApJ. 22 pages, 11 figures, supplementary figures and tables in appendix
A Quantum Theory of Cold Bosonic Atoms in Optical Lattices
Creators: name: Tilahun, Dagim
name: Duine, R. A.
name: MacDonald, A. H.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: Ultracold atoms in optical lattices undergo a quantum phase transition from a superfluid to a Mott insulator as the lattice potential depth is increased. We describe an approximate theory of interacting bosons in optical lattices which provides a qualitative description of both superfluid and insulator states. The theory is based on a change of variables in which the boson coherent state amplitude is replaced by an effective potential which promotes phase coherence between different number states on each lattice site. It is illustrated here by applying it to uniform and fully frustrated lattice cases, but is simple enough that it can easily be applied to spatially inhomogeneous lattice systems.
DSTSA-GCN: Advancing Skeleton-Based Gesture Recognition with Semantic-Aware Spatio-Temporal Topology Modeling
Creators: name: Cui, Hu
name: Huang, Renjing
name: Zhang, Ruoyu
name: Hayama, Tessai
Publisher: name: arXiv
Year: 2025
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Graph convolutional networks (GCNs) have emerged as a powerful tool for skeleton-based action and gesture recognition, thanks to their ability to model spatial and temporal dependencies in skeleton data. However, existing GCN-based methods face critical limitations: (1) they lack effective spatio-temporal topology modeling that captures dynamic variations in skeletal motion, and (2) they struggle to model multiscale structural relationships beyond local joint connectivity. To address these issues, we propose a novel framework called Dynamic Spatial-Temporal Semantic Awareness Graph Convolutional Network (DSTSA-GCN). DSTSA-GCN introduces three key modules: Group Channel-wise Graph Convolution (GC-GC), Group Temporal-wise Graph Convolution (GT-GC), and Multi-Scale Temporal Convolution (MS-TCN). GC-GC and GT-GC operate in parallel to independently model channel-specific and frame-specific correlations, enabling robust topology learning that accounts for temporal variations. Additionally, both modules employ a grouping strategy to adaptively capture multiscale structural relationships. Complementing this, MS-TCN enhances temporal modeling through group-wise temporal convolutions with diverse receptive fields. Extensive experiments demonstrate that DSTSA-GCN significantly improves the topology modeling capabilities of GCNs, achieving state-of-the-art performance on benchmark datasets for gesture and action recognition, including SHREC17 Track, DHG-14\/28, NTU-RGB+D, and NTU-RGB+D-120.
description: submit to Neurocomputing
On properties of projection operators associated with convex sets
Creators: name: Bui, Minh
Publisher: name: University of British Columbia
Year: 2018

description: The aim of this research work is twofold. On the one hand, under mild assumptions, we give an explicit formula for projection operator associated with the intersection of a cone and a ball/sphere; nevertheless, this formula plays a role in determining copositivity of matrices. On the other hand, we provide a complete answer to the question “When is the sum of projectors a projector?,” which allows us to fill a gap in the current literature.
Badhamia macrocarpa Rostaf., Sluzowce
Creators: name: Treviño-Zevallos, Italo
name: García-Cunchillos, Iván
name: Basanta, Diana Wrigley De
name: Lado, Carlos
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Protozoa
Mycetozoa
Myxomycetes
Physarales
Physaraceae
Badhamia
Badhamia macrocarpa

description: 14. Badhamia macrocarpa (Ces.) Rostaf., Sluzowce monogr. 143 (1874)
 Specimens examined. PERU. Arequipa: Caylloma, Cabanaconde, Colca Valley, Tapay viewpoint, ctra. PE-1SE, 8 km east of Cabanaconde, 3740 m, 15º36′38.4”S, 71º53′25.4”W, 9 Oct 2012, debris of Corryocactus sp., Lado 22251 (MA-Fungi 94789, USM). Huancavelica: Huancavelica, Acoria, route PE-26, km 39, Ccaccasiri, 3875 m, 12º38′32”S, 74º55′06”W, 25 Apr 2017, debris of Austrocylindropuntia subulata, Lado 25221 (MA-Fungi 96405). Tacna: Tacna, Chulpapalca, route PE-40, km 63,700, east of Palca, 3220 m, 17º46′07.2”S, 69º56′23.7”W, 5 Oct 2012, debris of Corryocactus brevistylus, Lado 22103 (MA-Fungi 94698).
description: Published as part of Treviño-Zevallos, Italo, García-Cunchillos, Iván, Basanta, Diana Wrigley De & Lado, Carlos, 2023, Diversity of Myxomycetes from Peru Part III: The high Andes and the altiplano, pp. 1-92 in Phytotaxa 624 (1) on page 12, DOI: 10.11646/phytotaxa.624.1.1, http://zenodo.org/record/10150721
Spatio-temporal anomalous diffusion in heterogeneous media by NMR
Creators: name: Palombo, M.
name: Gabrielli, A.
name: De Santis, S.
name: Cametti, C.
name: Ruocco, G.
name: Capuani, S.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: For the first time, the diffusion phase diagram in highly confined colloidal systems, predicted by Continuous Time Random Walk (CTRW), is experimentally obtained. Temporal and spatial fractional exponents, $α$ and $μ$, introduced within the framework of CTRW, are simultaneously measured by Pulse Field Gradient Nuclear Magnetic Resonance technique in samples of micro-beads dispersed in water. We find that $α$ depends on the disorder degree of the system. Conversely, $μ$ depends on both bead sizes and magnetic susceptibility differences within samples. Our findings fully match the CTRW predictions.
description: 5 pages, 4 figures, submitted to Phys. Rev. Lett
Local helioseismology and the active Sun
Creators: name: Schunker, Hannah
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The goal of local helioseismology is to elicit three-dimensional information about the sub-surface (or far-side) structure and dynamics of the Sun from observations of the helioseismic wave field at the surface. The physical quantities of interest include flows, sound-speed deviations and magnetic fields. However, strong surface magnetic fields induce large perturbations to the waves making inversions difficult to interpret. The purpose of this paper is to outline the methods of analysis used in local helioseismology, review discoveries associated with the magnetic Sun made using local helioseismology from the past three years, and highlight the efforts towards imaging the interior in the presence of strong magnetic fields.
description: 6 pages, 4th HELAS International Conference, Lanzarote, Spain, 1-5 February 2010
MODERN EDUCATIONAL TECHNOLOGIES IN THE TEACHING FOREIGN LANGUAGES TO POSTGRADUATE STUDENTS
Creators: name: Aleksandrova, E.
name: Barbasheva, S.
Publisher: name: Sciences of Europe
Year: 2020
Subjects: modern educational technologies
postgraduates students
non-linguistic university
qualifying English examination for postgraduate degree
specifics of a foreign language teaching.

description: This article is devoted to the specifics of teaching a foreign language using modern educational technologies at the postgraduate stage. The learning of a foreign language at this stage is considered to be a condition for the professional and personal development of a specialist. The scientific novelty of the study is the analyzing the possibility of introducing element-by-element several educational technologies in a different level language skills group
Nonlinear behavior of geometric phases induced by photon pairs
Creators: name: Kobayashi, H.
name: Ikeda, Y.
name: Tamate, S.
name: Nakanishi, T.
name: Kitano, M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this study, we observe the nonlinear behavior of the two-photon geometric phase for polarization states using time-correlated photons pairs. This phase manifests as a shift of two-photon interference fringes. Under certain arrangements, the geometric phase can vary nonlinearly and become very sensitive to a change in the polarization state. Moreover, it is known that the geometric phase for $N$ identically polarized photons is $N$ times larger than that for one photon. Thus, the geometric phase for two photons can become two times more sensitive to a state change. This high sensitivity to a change in the polarization can be exploited for precision measurement of small polarization variation. We evaluate the signal-to-noise ratio of the measurement scheme using the nonlinear behavior of the geometric phase under technical noise and highlight the practical advantages of this scheme.
description: 10 pages, 10 figures
Enhancement of superconductivity on thin film of Sn under high pressure
Creators: name: Sasaki, Misaki
name: Ohkuma, Masahiro
name: Matsumoto, Ryo
name: Shinmei, Toru
name: Irifune, Tetsuo
name: Takano, Yoshihiko
name: Shimizu, Katsuya
Publisher: name: arXiv
Year: 2025
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We investigated the pressure effects of a superconductivity on thin films of Sn. Elemental superconductor Sn with a body-centered tetragonal structure, $β$-Sn, exhibits superconductivity below the superconducting transition temperature ($T_{\rm c}=3.72$ K) at ambient pressure. $T_{\rm c}$ of Sn increases with lowering dimension such as in thin film and nanowire growth, or by high-pressure application. For thin films, $T_{\rm c}$ exhibits a slight increase up to approximately 4 K compared to the bulk value, attributable to the crystalline size and lattice disorder. By applying pressure on a bulk Sn, $T_{\rm c}$ initially decreases from 3.72 K as the pressure increases. Further increasing pressure up to 10 GPa, $T_{\rm c}$ increases to 5.3 K with the structural transformation. However, the combination of these effects on thin films of Sn, namely, thin-film growth and pressure effects, remains underexplored. In this study, we combined film-growth and pressure-application techniques to further increase $T_{\rm c}$ using a diamond anvil cell with boron-doped diamond electrodes. The drop of the electrical resistance suggesting the onset of $T_{\rm c}$ on the thin film reached above 6 K in $γ$-Sn phase. Further, the upper critical magnetic field was drastically enhanced. Atomic force microscopy suggests that the refinement of the grain size of the thin film under the non-hydrostatic pressure conditions contributes to stabilizing the higher $T_{\rm c}$ of $γ$-Sn.
Witness based nonlinear detection of quantum entanglement
Creators: name: Wang, Yiding
name: Zhang, Tinggui
name: Huang, Xiaofen
name: Fei, Shao-Ming
Publisher: name: arXiv
Year: 2025
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a nonlinear entanglement detection strategy which detects entanglement that the linear detection strategy fails. We show that when the nonlinear entanglement detection strategy fails to detect the entanglement of an entangled state with two copies, it may succeed with three or more copies. Based on our strategy, a witness combined with a suitable quanutm mechanical observable may detect the entanglement that can not be detected by the witness alone. Moreover, our strategy can also be applied to detect multipartite entanglement by using the witnesses for bipartite systems, as well as to entanglement concentrations.
description: 13 pages, 5 figures
Strong influence of packing density in terahertz metamaterials
Creators: name: Singh, Ranjan
name: Rockstuhl, Carsten
name: Zhang, Weili
Publisher: name: arXiv
Year: 2010
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We investigate the response of terahertz metamaterials made of split-ring resonators depending on the unit cell density. It is shown that the fundamental resonance has its highest Q factor for a period of one-third the resonance wavelength. Increasing or decreasing the period from that optimal period reduces the Q factor. All observations are explained by understanding radiative coupling as the dominant loss mechanism at low densities, whereas the strong inter SRR coupling enhances non-radiative losses at high densities. Our results allow designing metamaterials with adjustable Q factors and possibly suggesting that an optimal package density exists to induce the strongest dispersion.
description: 7 pages, 4 figures
THE ROLE AND PLACE OF MEGAPROJECTS IN FORMATION THE REGION'S INFRASTRUCTURE
Creators: name: Andresian, I.
Publisher: name: Sciences of Europe
Year: 2020
Subjects: infrastructure
real estate
Olympic Games
road management
road industry
transportation
development
agency
quality.

description: The modernisation of Sochi’s transportation system ahead of the Games included constructing more than 360km of roads, 321km of railroad tracks and 22 tunnels. The legacy of transportation department in the city of Sochi involves innovative approaches to traffic management. In preparing for the Games, the city analysed the best world practices to put together a logistical management system, the Transportation Logistic Centre, that sufficiently improves the efficiency of complex, reduces the need for vehicles and heightens the quality of public transport services. In so doing, it enabled to optimise traffic management during the Games and the number of vehicles used. Transport in the city of Sochi has undergone decades worth of modernisation in the space of two to three years. It will have a hugely positive impact on the lives of Sochi citizens for generations to come. Moreover, the attractiveness of the city has increased due to significant investments in infrastructure and active promotion of the city. The total investment in the winter Games amounted to about 1.5 trillion rubles. Most of the funds were spent on infrastructure development.