cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
In vitro anti-inflammatory, anticancer effects and phytochemical characterisation of organic extracts from Aristolochia olivieri Colleg. ex Boiss
Creators: name: Abdullah, Fuad O.
Publisher: name: Taylor & Francis
Year: 2024
Subjects: subject: Biochemistry
subject: Molecular Biology
subject: Pharmacology
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Cancer
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Plant Biology

description: Natural extract plays a crucial role in our lives, major compound in the n-hexane (AR-H) and the ethyl acetate (AR-E) Aristolochia olivieri extracts was n-hexadecanoic acid, and of the methanol extract (AR-M) was pentacosane. The AR-M extract had a strong ability to induce mRNA expression of an inflammatory cytokine, IL-6, as an M1-like macrophage subset compared to the negative control (DMSO-treated cells). In contrast, AR-E treatment showed strong anti-inflammatory activity against macrophages. The AR-H extract had a moderate inflammatory effect against macrophages. The IC50 results of the anticancer assays ranged from 58.29 to 451.03 μg/mL for the three extracts. The anticancer action of the AR-E extract against U-87MG cells was higher (58.29 μg/mL) than that of AR-H and AR-M (156.38 and 196.14 μg/mL, respectively). The greater cytotoxicity effect observed with the AR-E extract against U-87MG can be linked to its high content of hexadecanoic acid (32.49%) and linolenic acid (12.90%).
Constant $Q$-curvature metrics with a singularity
Creators: name: König, Tobias
name: Laurain, Paul
Publisher: name: arXiv
Year: 2021
Subjects: subject: Analysis of PDEs (math.AP)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: For dimensions $n \geq 3$, we classify singular solutions to the generalized Liouville equation $(-Δ)^{n/2} u = e^{nu}$ on $\mathbb{R}^n \setminus \{0\}$ with the finite integral condition $\int_{\mathbb{R}^n} e^{nu} < \infty$ in terms of their behavior at $0$ and $\infty$. These solutions correspond to metrics of constant $Q$-curvature which are singular in the origin. Conversely, we give an optimal existence result for radial solutions. This extends some recent results on solutions with singularities of logarithmic type to allow for singularities of arbitrary order. As a key tool to the existence result, we derive a new weighted Moser--Trudinger inequality for radial functions.
title: Administration, Delivery, and Creation of Public Value: Zambia’s Public Pension Fund
Creators: name: Michelo, Kelly
Publisher: name: Maryland Shared Open Access Repository
Year: 2025
Subjects: subject: Public Value
subject: Ubuntu
subject: Pension Reforms
subject: Public Pension Funds
subject: Administration

description: D.P.A. -- The University of Baltimore, 2024
description: This study pioneers the application of the Public Value (PV) framework to Zambia’s Public Pension Funds (PPFs); it explores stakeholder’s conceptions of public value and its alignment with Ubuntu principles. Through 47 in-depth interviews over 7 months, the research identifies challenges in addressing the growing elderly population’s needs and proposes reforms to improve the pension system. The study’s innovative alignment of PV with Ubuntu principles offers social solidarity and collective well-being. The research investigates how stakeholders’ conceptions of public value align with their goals, the existing administrative frameworks, and the needs of the PPFs, and implications for reforming PPF to better serve retired public servants and the growing elderly population. This qualitative study contributes to the understanding of public value in pension system reform and informs policy and administrative improvements for Zambia’s PPFs. Key findings highlight the need for aligning vision and mission statements with social protection goals and Ubuntu principles, addressing funding and technological constraints, enhancing transparency and stakeholder engagement, and digitizing and decentralizing services. This research seeking to improve public pension systems in Africa and beyond.
Superconducting Field Theory
Creators: name: Perez Felipe, Sergio
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 490205
subject: Mathematical aspects of quantum and conformal field theory, quantum gravity and string theory

description: Unification theory with no extra dimensions. The first part unifies the strong nuclear force with the gravitational force in a mathematical way, the second part unifies the nuclear force with the quantum vacuum in a hypothetical structure.
Reflection Positivity and Monotonicity
Creators: name: Jaffe, Arthur
name: Ritter, Gordon
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mathematical Physics (math-ph)
subject: Analysis of PDEs (math.AP)
subject: Differential Geometry (math.DG)
subject: Functional Analysis (math.FA)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 81T20; 81T08; 58J05; 81Q10; 81Q70; 20F55

description: We prove general reflection positivity results for both scalar fields and Dirac fields on a Riemannian manifold, and comment on applications to quantum field theory. As another application, we prove the inequality $C_D \leq C_N$ between Dirichlet and Neumann covariance operators on a manifold with a reflection.
description: 11 pages
Effective Model for Rare-earth Kitaev Materials and its Classical Monte Carlo Simulation
Creators: name: Sun, Mengjie
name: Lin, Huihang
name: Zhang, Zheng
name: Cai, Yanzhen
name: Ren, Wei
name: Kang, Jing
name: Ji, Jianting
name: Jin, Feng
name: Wang, Xiaoqun
name: Yu, Rong
name: Zhang, Qingming
name: Liu, Zhengxin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Recently, the family of rare-earth chalcohalides were proposed as candidate compounds to realize the Kitaev spin liquid (KSL). In the present work, we firstly propose an effective spin Hamiltonian consistents with the symmetry group of the crystal structure. Then we apply classical Monte Carlo simulations to preliminarily study the model and establish a phase diagram. When approaching to the low temperature limit, several magnetic long range orders are observed, including the stripe, the zigzag, the antiferromagnetic (AFM), the ferromagnetic (FM), the incommensurate spiral (IS), the Multi-$\pmb {Q}$ and the 120°. We further calculate the thermodynamic properties of the system, such as the temperature dependence of the magnetic susceptibility and the heat capacity. The ordering transition temperatures reflected in the two quantities agree with each other. For most interaction regions, the system is magnetically more susceptible in the $ab$-plane than in the $c$-direction. The stripe phase is special, where the susceptibility is fairly isotropic in the whole temperature region. These features provide useful information to understand the magnetic properties of related materials.
Spin polaron theory for the photoemission spectra of layered cobaltates
Creators: name: Chaloupka, J.
name: Khaliullin, G.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Recently, strong reduction of the quasiparticle peaks and pronounced incoherent structures have been observed in the photoemission spectra of layered cobaltates. Surprisingly, these many-body effects are found to increase near the band insulator regime. We explain these unexpected observations in terms of a novel spin-polaron model for CoO_2 planes which is based on a fact of the spin-state quasidegeneracy of Co^{3+} ions in oxides. Scattering of the photoholes on spin-state fluctuations suppresses their coherent motion. The observed ``peak-dip-hump'' type lineshapes are well reproduced by the theory.
description: 4 pages, 4 figures
A seismic refraction study of the Queen Charlotte fault zone
Creators: name: Dehler, Sonya Astrid
Publisher: name: University of British Columbia
Year: 2010

description: The margin between the continental North American and oceanic Pacific plates west of the Queen Charlotte Islands is uniquely marked by an active transform fault zone. The region is the locus of oblique convergence between the two lithospheric plates. West of the fault zone the absent continental shelf is replaced by a 25 km wide scarp-bounded terrace at 2 km depth which separates the oceanic and continental crust. An onshore-offshore seismic refraction survey was carried out in 1983 across the Queen Charlotte Islands region. Thirty-two explosive charges and several airgun lines were recorded on eleven land-based and six ocean-bottom instruments. A subset of the resulting data set was chosen to study the structure of the Queen Charlotte Fault zone and adjacent terrace. Two-dimensional ray tracing and synthetic seismogram modelling produced a velocity structural model of the fault region. Underlying the deformed terrace sediments is an upper 3 km thick faulted unit with velocity 3.8 km/s and a high gradient. The lower crustal region is on average 10 km thick and has velocity 5.3 km/s and a slightly lower gradient. Beneath this unit the Moho increases in dip from 5° to 19° eastward. The terrace velocities are anomalously low compared to the adjacent oceanic and continental crustal structures. Velocities of the oceanic crust are consistent with those observed in ophiolite sequences. The velocity structure of the continental crust is not well-defined; however, vertical offset of 1.1 km is seismically observed on the Rennell-Louscoone Fault on Moresby Island. Two tectonic mechanisms are proposed to explain the anomalous terrace structure. Subduction of the oceanic lithosphere beneath the terrace would accrete sediments to the seaward edge of the terrace and subduct material beneath it. Upthrusting of terrace material along near-vertical fault planes would result from compression at the transform fault above an inactive subduction zone. A combination or alternation of the two mechanisms would explain the observed fault zone structure.
Spin-exchange collisions of submerged shell atoms below 1 Kelvin
Creators: name: Harris, J. G. E.
name: Nguyen, S. V.
name: Doret, S. C.
name: Ketterle, W.
name: Doyle, J. M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Angular momentum changing collisions can be suppressed in atoms whose valence electrons are submerged beneath filled shells of higher principle quantum number. To determine whether spin-exchange collisions are suppressed in these "submerged shell" atoms, we measured spin-exchange collisions of six hyperfine states of Mn at temperatures below 1 K. Although the 3d valence electrons in Mn are submerged beneath a filled 4s orbital, we find that the spin exchange rate coefficients are similar to those of Na and H (which are non-submerged shell atoms).
description: 16 pages, 2 figs
The SMC SNR 1E0102.2-7219 as a Calibration Standard for X-ray Astronomy in the 0.3-2.5 keV Bandpass
Creators: name: Plucinsky, Paul P.
name: Haberl, Frank
name: Dewey, Daniel
name: Beardmore, Andrew P.
name: DePasquale, Joseph M.
name: Godet, Olivier
name: Grinberg, Victoria
name: Miller, Eric D.
name: Pollock, A. M. T.
name: Sembay, Steve
name: Smith, Randall K.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The flight calibration of the spectral response of CCD instruments below 1.5 keV is difficult in general because of the lack of strong lines in the on-board calibration sources typically available. We have been using 1E 0102.2-7219, the brightest supernova remnant in the Small Magellanic Cloud, to evaluate the response models of the ACIS CCDs on the Chandra X-ray Observatory (CXO), the EPIC CCDs on the XMM-Newton Observatory, the XIS CCDs on the Suzaku Observatory, and the XRT CCD on the Swift Observatory. E0102 has strong lines of O, Ne, and Mg below 1.5 keV and little or no Fe emission to complicate the spectrum. The spectrum of E0102 has been well characterized using high-resolution grating instruments, namely the XMM-Newton RGS and the CXO HETG, through which a consistent spectral model has been developed that can then be used to fit the lower-resolution CCD spectra. We have also used the measured intensities of the lines to investigate the consistency of the effective area models for the various instruments around the bright O (~570 eV and 654 eV) and Ne (~910 eV and 1022 eV) lines. We find that the measured fluxes of the O VII triplet, the O VIII Ly-alpha line, the Ne IX triplet, and the Ne X Ly-alpha line generally agree to within +/-10 % for all instruments, with 28 of our 32 fitted normalizations within +/-10% of the RGS-determined value. The maximum discrepancies, computed as the percentage difference between the lowest and highest normalization for any instrument pair, are 23% for the O VII triplet, 24% for the O VIII Ly-alpha line, 13% for the Ne IX triplet, and 19% for the Ne X Ly-alpha line. If only the CXO and XMM are compared, the maximum discrepancies are 22% for the O VII triplet, 16% for the O VIII Ly-alpha line, 4% for the Ne IX triplet, and 12% for the Ne X Ly-alpha line.
description: 16 pages, 11 figures, to be published in Proceedings of the SPIE 7011: Space Telescopes and Instrumentation II: Ultraviolet to Gamma Ray 2008
On Einstein hypersurfaces of $I\times_{f}\mathbb{Q}^{n}(c)$
Creators: name: Borges, Valter
name: da Silva, Adam
Publisher: name: arXiv
Year: 2021
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53C42, 53B25, 53C25, 53C15

description: In this paper, we investigate Einstein hypersurfaces of the warped product $I\times_{f}\mathbb{Q}^{n}(c)$, where $\mathbb{Q}^{n}(c)$ is a space form of curvature $c$. We prove that $M$ has at most three distinct principal curvatures and that it is locally a multiply warped product with at most two fibers. We also show that exactly one or two principal curvatures on an open set imply constant sectional curvature on that set. For exactly three distinct principal curvatures this is no longer true, and we classify such hypersurfaces provided it does not have constant sectional curvature and a certain principal curvature vanishes identically.
description: Minor corrections
title: Nucleosynthesis on the aftermath of neutron star mergers: The creation of the first r-process peak
Creators: name: Nikas, Stylianos
Publisher: name: UNSPECIFIED
Year: 2021

description: The rapid neutron capture nucleosynthesis (r-process) is responsible for producing about half of the solar abundances of heavy elements. The site of the r-process was unknown until recent observations. The identification of the kilonova in the aftermath of GW170817 established binary neutron star mergers (BNS) as a site for the r-process. The early blue color of the emission indicates the production of light, lanthanide-free, elements and can be linked to a "weak" r-process nucleosynthesis scenario. We explored nucleosynthesis under a broad set of entropy and electron fraction conditions using GSINet. We concluded that with conditions realized in BNS, an abundance pattern resembling the first r-process peak could be created, accompanied by a peak at A ≈ 50. The origin of the peak at A ≈ 50 was found to be material that could not escape the Z = 20 closed protons shell. More specifically, we found that in the absence of α-particles, the isotopes of Ca with A = 54 − 58 were the critical isotopes regulating the flow towards higher A for low entropy (S ≈ 15 kb/baryon) and moderate electron fraction (0.35 ≤ Ye ≤ 0.40) conditions. We investigated the impact of nuclear properties (namely masses, β-decays, β-delayed neutron emissions) on the production of the first r-process peak under these conditions. To quantify the impact of nuclear masses on the final abundance pattern, we studied the impact of nuclear mass on calculations of (n, γ) reaction rates. We calculated sets of reaction rates corresponding to the mass uncertainty bands. We assumed the true mass to lie between the central AME16 value and its uncertainty. For unknown masses, the FRDM mass model was used with a 1 MeV uncertainty. Using the TALYS nuclear reaction code, we performed large-scale calculations of reaction rates corresponding to the region responsible for creating the first r-process peak. The calculated reaction rates were then used in GSINet to calculate abundances. The impact of each modified mass on the abundance pattern was evaluated. We found that 55,56,57,58Sc,77Ni, and 83Zn are the nuclei with the most significant impact on the abundance pattern. Furthermore, the impact of mass uncertainties on radioactive heating was evaluated. We identified and presented the nuclei responsible for the heating production. We concluded that current uncertainties in mass values could lead to uncertainties in heating up to a factor of two. We observed that the shape of the abundance pattern does not drastically change under changes in mass values. Masses were found to impact the peak local structure. A specific study of the impact of the masses of 84,85Ga to the local maximum at A = 84 was presented. Finally, we evaluated the impact of β-decays, finding no significant variations on the final abundance pattern.
Detection of the YORP Effect on the contact-binary (68346) 2001 KZ66 from combined radar and optical observations
Creators: name: Zegmott, Tarik J.
name: Lowry, S. C.
name: Rożek, A.
name: Rozitis, B.
name: Nolan, M. C.
name: Howell, E. S.
name: Green, S. F.
name: Snodgrass, C.
name: Fitzsimmons, A.
name: Weissman, P. R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The YORP effect is a small thermal-radiation torque experienced by small asteroids, and is considered to be crucial in their physical and dynamical evolution. It is important to understand this effect by providing measurements of YORP for a range of asteroid types to facilitate the development of a theoretical framework. We are conducting a long-term observational study on a selection of near-Earth asteroids to support this. We focus here on (68346) 2001 KZ66, for which we obtained both optical and radar observations spanning a decade. This allowed us to perform a comprehensive analysis of the asteroid's rotational evolution. Furthermore, radar observations from the Arecibo Observatory enabled us to generate a detailed shape model. We determined that (68346) is a retrograde rotator with its pole near the southern ecliptic pole, within a $ 15^\circ$ radius of longitude $ 170^\circ$ and latitude $ -85^\circ$. By combining our radar-derived shape model with the optical light curves we developed a refined solution to fit all available data, which required a YORP strength of $ (8.43\pm0.69)\times10^{-8} \rm~rad ~day^{-2} $. (68346) has a distinct bifurcated shape comprising a large ellipsoidal component joined by a sharp neckline to a smaller non-ellipsoidal component. This object likely formed from either the gentle merging of a binary system, or from the deformation of a rubble pile due to YORP spin-up. The shape exists in a stable configuration close to its minimum in topographic variation, where regolith is unlikely to migrate from areas of higher potential.
description: To be published in the Monthly Notices of the Royal Astronomical Society (MNRAS). 19 pages, 14 figures
Managing social and technical infrastructure for planning shrinking cities
Creators: name: Augis, Fanny
Publisher: name: Zenodo
Year: 2021
Subjects: shrinking cities
infrastructure
right-sizing

description: In shrinking cities, mainly defined by a loss of population, infrastructures such as networks, housing, or schools are affected: due to the decline of the population, infrastructures appear underused. This raises unusual concerns for the municipalities mainly because infrastructures are planned for a long-term purpose and to supply high demand. The adaptation of infrastructures is needed; however, this is complex to implement for the concerned municipalities due to the lack of financial resources or uncertainties on the evolution of the demand. This poster presented at the conference CITTA (university of Porto) aimed at introducing on the concept of infrastructure, the challenge for planning infrastructure in shrinking cities and the need to further analysed adaptation strategies in a shrinkage context.
Ultra-compact binary pulsars as continuous dual-line gravitational wave sources
Creators: name: Chen, Wen-Cong
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Binary millisecond pulsars (MSPs) are detached binary systems consisting of a MSP and a He white dwarf. If the initial orbital periods of binary MSPs are less than 0.3 day, they would evolve toward ultra-compact binary pulsars due to the rapid orbital shrinkage by the gravitational wave (GW) radiation. During the orbital decay, the MSP with an ellipticity would spin down by the GW radiation and the magnetic dipole radiation. Our calculations indicate that the angular momentum loss is dominated by the GW radiation when the ellipticities of the neutron stars (NSs) are in the range of $(1-50)\times 10^{-7}$, and the frequencies of high-frequency GW signals from the rotating NSs are $10-100$ Hz when the binary pulsars can be visible as low-frequency GW sources. These high-frequency GW signals are possible to be detected by the aLIGO and the third-generation GW detectors such as Einstein Telescope, depending on the frequencies and the distances. Therefore, some ultra-compact binary pulsars have an opportunity to become intriguing dual-line GW sources. By detecting the low-frequency GW signals, the NS mass can be accurately derived. A dual-line detection of two band GW signals could provide a constraint on the moment of inertia and the ellipticity of the NS. Thus the dual-line GW sources can be potentially applied to constrain the equation of state of the NS.
description: 7 pages, 3 figures, Phys. Rev. D in press
Perpetual American options within CTRW's
Creators: name: Montero, Miquel
Publisher: name: arXiv
Year: 2007
Subjects: subject: Pricing of Securities (q-fin.PR)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Economics and business
subject: FOS: Physical sciences

description: Continuous-time random walks are a well suited tool for the description of market behaviour at the smallest scale: the tick-to-tick evolution. We will apply this kind of market model to the valuation of perpetual American options: derivatives with no maturity that can be exercised at any time. Our approach leads to option prices that fulfil financial formulas when canonical assumptions on the dynamics governing the process are made, but it is still suitable for more exotic market conditions.
description: elsart, 12 pages, 2 figures, presented at APFA 6 conference; Revised and condensed version: 8 pages
Resonant contributions to inclusive nucleon structure functions from exclusive meson electroproduction data
Creators: name: Blin, A. N. Hiller
name: Melnitchouk, W.
name: Mokeev, V. I.
name: Burkert, V. D.
name: Chesnokov, V. V.
name: Pilloni, A.
name: Szczepaniak, A. P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Nucleon resonance contributions to the inclusive proton $F_2$ and $F_L$ structure functions are computed from resonance electroexcitation amplitudes in the mass range up to 1.75 GeV extracted from CLAS exclusive meson electroproduction data. Taking into account for the first time quantum interference effects, the resonance contributions are compared with inclusive proton structure functions evaluated from $(e,e'X)$ cross section data and the longitudinal to transverse cross section ratio. Contributions from isospin-1/2 and 3/2 resonances remain substantial over the entire range of photon virtualities $Q^2 \lesssim 4$ GeV$^2$, where their electroexcitation amplitudes have been obtained, and their $Q^2$ evolution displays pronounced differences in the first, second and third resonance regions. We compare the structure functions in the resonance region with those computed from parton distributions fitted to deep-inelastic scattering data, and extrapolated to the resonance region, providing new quantitative assessments of quark-hadron duality in inclusive electron-proton scattering.
Subsphaerolaimus danshuiensis Xiao & Guo 2023, sp. nov.
Creators: name: Xiao, Yueping
name: Guo, Yuqing
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Nematoda
Chromadorea
Monhysterida
Sphaerolaimidae
Subsphaerolaimus
Subsphaerolaimus danshuiensis

description: Morphological description of Subsphaerolaimus danshuiensis sp. nov.
urn:lsid:zoobank.org:act: 8FEE2E0E-9792-4FAA-B13F-1AD831536FEB
(Figures 2–3, Table 1)
Type material. Eight males and five females were collected from station DSH 1 in February 2021. Holotype: ♁1 on slide number DS20210219 H11. Paratypes: ♁2 on slide number DS20210219 H12, ♁3 on slide number DS20210219 H17, ♁4 on slide number DS20210219 H18, ♁5 on slide number DS20210219 H110, ♁6 and ♁7 on slide number DS20210219 H111, ♁8 on slide number DS20210219 H115, ♀ 1 on slide number DS20210219 H11, ♀ 2 on slide number DS20210219 H18, ♀ 3 and ♀ 4 on slide number DS20210219 H110, ♀ 5 on slide number DS20210219 H111 and ♀ 6 on slide number DS20210219 H115.
Type locality and habitat. All specimens were collected from a mangrove (Kandelia obovata) forest in Danshui District, Xinbei City, Taiwan. Station DS: 121°26'34.44″E, 25°6'54.72″N.
Etymology. The species epithet refers to the type locality: Danshui.
description: Published as part of Xiao, Yueping & Guo, Yuqing, 2023, Three new free-living marine nematode species of Subsphaerolaimus Lorenzen, 1978, Halichoanolaimus de Man, 1886 and Belbolla Andrássy, 1973 from mangrove wetlands in Taiwan, pp. 301-322 in Zootaxa 5361 (3) on pages 303-305, DOI: 10.11646/zootaxa.5361.3.1, http://zenodo.org/record/10146950
Antioxidant, antibacterial and antibiofilm activities of Pittosporum napaulense (DC.) against drug-resistant Staphylococcus aureus and Shigella sp
Creators: name: Hota, Sajna Sameekshya
name: Sahoo, Dibya Ranjan
name: Pattnaik, Subhaswaraj
name: Mishra, Monika
name: Mishra, Tapasa
name: Sahu, Tanuja
name: Naik, Baishali Basundhara
name: Kalyankumarraju, Malayamarutham
name: Dixit, Amit Kumar
name: Lamba, Deepak
name: R., Sanjaya Kumar Y.
name: Acharya, Rabinarayan
name: Naik, Pradeep Kumar
Publisher: name: Taylor & Francis
Year: 2024
Subjects: subject: Biochemistry
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: Biotechnology
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Plant Biology
subject: Virology

description: Gandhamardan has a rich heritage of floristic diversity with undocumented medicinal plants, called Anukta Dravya having immense pharmacological values. Among them, Pittosporum napaulense (DC.) Rehder & E. H. Wilson is an important medicinal plant with widespread pharmacological importance. The antioxidant potential, antibacterial and antibiofilm activities of P. napaulense (DC.) were evaluated. The ethanolic extract showed the highest share of phenolic and flavonoid contents responsible for DPPH and ABTS radical scavenging activity with an IC50 of 5.58 and 5.28 µg/ml, respectively. In addition, the extracts also showed antibacterial and antibiofilm properties against multidrug-resistant bacterial strains, Staphylococcus aureus and Shigella sp. The biological activities of P. napaulense (DC.) bark could be attributed to the presence of phytoconstituents such as Malabaricone C, Borapetoside B, Kanzonol R. as evident from UPLC-Q-TOF-MS analysis. Based on the bioactivities; this plant could be explored for the development of potential therapeutic drug candidates against severe bacterial diseases.
Magnetic and thermal properties of a one-dimensional spin-1 model
Creators: name: Mancini, F.
name: Mancini, F. P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the one-dimensional S=1 Blume-Emery-Griffiths model. Upon transforming the spin model into an equivalent fermionic model, we provide the exact solution within the Green's function and equations of motion formalism. We show that the relevant response functions as well as thermodynamic quantities can be determined, in the whole parameters space, in terms of a finite set of local correlators. Furthermore, considering the case of an antiferromagnetic chain with single-ion anisotropy in the presence of an external magnetic field, we find three plateaus in the magnetization curve; in the neighborhood of the endpoints of the intermediate plateau, the specific heat shows a double peak structure.
description: 7 pages, 4 figures. This paper is dedicated to Professor Igor Stasyuk on the occasion of his 70th birthday
Nonlinear N=2 Supersymmetry, Effective Actions and Moduli Stabilization
Creators: name: Antoniadis, I.
name: Derendinger, J. P.
name: Maillard, T.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Nonlinear supersymmetry is used to compute the general form of the effective D-brane action in type I string theory compactified to four dimensions in the presence of internal magnetic fields. In particular, the scalar potential receives three contributions: (1) a nonlinear part of the D-auxiliary component, associated to the Dirac-Born-Infeld action; (2) a Fayet-Iliopoulos (FI) D-term with a moduli-dependent coefficient; (3) a D-auxiliary independent (but moduli dependent) piece from the D-brane tension. Minimization of this potential leads to three general classes of vacua with moduli stabilization: (i) supersymmetric vacua allowing in general FI terms to be cancelled by non-trivial vacuum expectation values (VEV's) of charged scalar fields; (ii) anti-de Sitter vacua of broken supersymmetry in the presence of a non-critical dilaton potential that can be tuned at arbitrarily weak string coupling; (iii) if the dilaton is fixed in a supersymmetric way by three-form fluxes and in the absence of charged scalar VEV's, one obtains non supersymmetric vacua with positive vacuum energy.
description: 33 pages
Pressure-driven phase transformations and phase segregation in ferrielectric CuInP$_2$S$_6$-In$_{4/3}$P$_2$S$_6$ self-assembled heterostructures
Creators: name: Rao, Rahul
name: Conner, Benjamin S.
name: Selhorst, Ryan
name: Susner, Michael A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Layered multi-ferroic materials exhibit a variety of functional properties that can be tuned by varying the temperature and pressure. As-synthesized CuInP$_2$S$_6$ is a layered material that displays ferrielectric behavior at room temperature. When synthesized with Cu deficiencies, CuInP$_2$S$_6$ spontaneously phase segregates to form ferrielectric CuInP$_2$S$_6$ (CIPS) and paraelectric In$_{4/3}$P$_2$S$_6$ (IPS) domains in a two-dimensional self-assembled heterostructure. Here, we study the effect of hydrostatic pressure on the structure of Cu-deficient CuInP$_2$S$_6$ by Raman spectroscopy measurements up to 20 GPa. Detailed analysis of the frequencies, intensities, and linewidths of the Raman peaks reveals four discontinuities in the spectra around 2, 10, 13 and 17 GPa. At ~2 GPa, we observe a structural transition initiated by the diffusion of IPS domains, which culminates in a drastic reduction of the number of peaks around 10 GPa. We attribute this to a possible monoclinic-trigonal phase transition at 10 GPa. At higher pressures (~ 13 GPa), significant increases in peak intensities and sharpening of the Raman peaks suggest a bandgap-lowering and an isostructural electronic transition, with a possible onset of metallization at pressures above 17 GPa. When the pressure is released, the structure again phase-separates into two distinct chemical domains within the same single crystalline framework -- however, these domains are much smaller in size than the as-synthesized material resulting in suppression of ferroelectricity through nanoconfinement. Hydrostatic pressure can thus be used to tune the electronic and ferrielectric properties of Cu-deficient layered CuInP$_2$S$_6$.
description: 7 Figures, 1 Table
Critical conductance of a one-dimensional doped Mott insulator
Creators: name: Garst, M.
name: Novikov, D. S.
name: Stern, Ady
name: Glazman, L. I.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We consider the two-terminal conductance of a one-dimensional Mott insulator undergoing the commensurate-incommensurate quantum phase transition to a conducting state. We treat the leads as Luttinger liquids. At a specific value of compressibility of the leads, corresponding to the Luther-Emery point, the conductance can be described in terms of the free propagation of non-interacting fermions with charge e/\sqrt{2}. At that point, the temperature dependence of the conductance across the quantum phase transition is described by a Fermi function. The deviation from the Luther-Emery point in the leads changes the temperature dependence qualitatively. In the metallic state, the low-temperature conductance is determined by the properties of the leads, and is described by the conventional Luttinger liquid theory. In the insulating state, conductance occurs via activation of e/\sqrt{2} charges, and is independent of the Luttinger liquid compressibility.
description: 13 pages, 3 figures. Published version
The microscopic origin of anomalous properties of ice relies on the strong quantum anharmonic regime of atomic vibrations
Creators: name: Cherubini, Marco
name: Monacelli, Lorenzo
name: Mauri, Francesco
Publisher: name: arXiv
Year: 2021
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Water ice is a unique material presenting intriguing physical properties, like negative thermal expansion and anomalous volume isotope effect (VIE). They arise from the interplay between weak hydrogen bonds and nuclear quantum fluctuations, making theoretical calculations challenging. Here, we employ the stochastic self-consistent harmonic approximation (SSCHA) to investigate how thermal and quantum fluctuations affect the physical properties of ice XI ab initio. Regarding the anomalous VIE, our work reveals that quantum effects on hydrogen are so strong to be in a nonlinear regime: when progressively increasing the mass of hydrogen from protium to infinity (classical limit), the volume firstly expands and then contracts, with a maximum slightly above the mass of tritium. We observe an anharmonic renormalization of about 10% in the bending and stretching phonon frequencies probed in IR and Raman experiments. For the first time, we report an accurate comparison of the low energy phonon dispersion with the experimental data, possible only thanks to high-level accuracy in the electronic correlation and nuclear quantum and thermal fluctuations, paving the way for the study of thermal transport in ice from first principles and the simulation of ice under pressure.
CKM and Tri-bimaximal MNS Matrices in a SU(5) x (d)T Model
Creators: name: Chen, Mu-Chun
name: Mahanthappa, K. T.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We propose a model based on SU(5) x {}^{(d)}T which successfully gives rise to near tri-bimaximal leptonic mixing as well as realistic CKM matrix elements for the quarks. The Georgi-Jarlskog relations for three generations are also obtained. Due to the {}^{(d)}T transformation property of the matter fields, the b-quark mass can be generated only when the {}^{(d)}T symmetry is broken, giving a dynamical origin for the hierarchy between m_{b} and m_{t}. There are only nine operators allowed in the Yukawa sector up to at least mass dimension seven due to an additional Z_{12} x Z'_{12} symmetry, which also forbids, up to some high orders, operators that lead to proton decay. The resulting model has a total of nine parameters in the charged fermion and neutrino sectors, and hence is very predictive. In addition to the prediction for θ_{13} \simeq θ_{c}/3 \sqrt{2}, the model gives rise to a sum rule, \tan^{2}θ_{\odot} \simeq \tan^{2} θ_{\odot, \mathrm{TBM}} - {1/2} θ_{c} \cosβ, which is a consequence of the Georgi-Jarlskog relations in the quark sector. This deviation could account for the difference between the experimental best fit value for the solar mixing angle and the value predicted by the tri-bimaximal mixing matrix.
description: 11 pages; v2: additional references added; minor modifications made; conclusion unchanged; v3: version to appear in Phys. Lett. B
title: Festkörperentnetzen dünner Bismutschichten: Quantitative Analyse von crystal truncation rods
Creators: name: Wansorra, Constantin
Publisher: name: UNSPECIFIED
Year: 2021

description: Die Festkörperentnetzung dünner Bismutschichten wurde mithilfe von Röntgenbeugung und der anschließenden Anpassung eines physikalischen Modells an die gemessenen crystal truncation rods analysiert. Dabei wurde der Enentzungsmechanismus der Schichten aufgeklärt und der Einfluss eines dehnungsgradienten und einer Oxidschicht auf das Entnetzungsverhalten diskutiert. Beides führt zu einer behinderung der Entnetzung und damit einer erhöhten Entnetungstemperatur, die anhand von Modellen erklärt wird.
Collective behavior of Zr-substituted polyoxometalates in solution: Insights from molecular dynamics simulations part 2
Creators: name: Chaumont, Alain
name: Carbó, Jorge J.
name: Jiménez-Lozano, Pablo
name: Puiggalí Jou, Jordi
Publisher: name: Zenodo
Year: 2025

description: Files related with the AMBER MD simulations of 500ns for studying [W5O18Zr(OH)(OH2)]3- ions with TBA+ counterions in Chloroform-Water bifasic system at 3 different anion concentrations in the water part: 

2 W5Zr and 6 TBA in a 42.5 x 42.5 x 150.1 Å3  box size which had 991 chloroform molecules and 4634 water molecules

6 W5Zr and 18 TBA in a 42.5 x 42.9 x 151.2 Å3  box size which had 991 chloroform molecules and 4634 water molecules

18 W5Zr and 54 TBA in a 44.3 x 44.3 x 152.6 Å3  box size which had 991 chloroform molecules and 4634 water molecules

Uploaded files for each simulation: input for the simulation (.in ), output from the simulation (.lis), topology file describing the system (.parm7), input coordinates (t_0.rst7), final coordinates after the simulation (t_500.rst7) and the trajectory file (.nc).
Spin-triplet p-wave pairing in a 3-orbital model for iron pnictide superconductors
Creators: name: Lee, Patrick A.
name: Wen, Xiao-Gang
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We examine the possibility that the superconductivity in the newly discovered FeAs materials may be caused by the Coulomb interaction between d-electrons of the iron atoms. We find that when the Hund's rule ferromagnetic interaction is strong enough, the leading pairing instability is in spin-triplet p-wave channel in the weak coupling limit. The resulting superconducting gap has nodal lines on the 3D Fermi surfaces. The k dependent hybridization of several orbitals around a Fermi pocket is the key for the appearance of the spin-triplet p-wave pairing.
description: 6 pages, 4 figures
Possible ionospheric electric currents for PI2 Micropulsations
Creators: name: Cappelle, Sabine
Publisher: name: University of British Columbia
Year: 2010

description: Two possible ionospheric electric currents for Pi2 micropulsations are investigated and tested against data collected from a meridian chain of stations in Saskatewan. The electric coupling between the ionosphere and the magnetosphere under disturbed magnetospheric conditions is believed to be the cause of the Pi2 generation and propagation. The LC circuit analogy is first used to model this interaction, the source of energy lying in the magnetospheric equatorial plane. Secondly, the possibility of an ionospheric electric impulse imparted to a field-aligned current under the conditions of brightening of aurora is considered. It is found experimentally that the Pi2 originates possibly from these two source regions: the characteristics of a resonant LC oscillation expanding symmetrically to the west and to the east of the magnetospheric potential source are observed, as well a strong toroidal field existing and possibly originating in the ionosphere. It is suggested that optical data in conjunction with auroral radar echo and satellite data be necessary to confirm a future mathematical development of these possible Pi2 generation and propagation models.
The Laplacian on hyperbolic 3-manifolds with Dehn surgery type singularities
Creators: name: Pfaeffle, Frank
name: Weiss, Hartmut
Publisher: name: arXiv
Year: 2007
Subjects: subject: Differential Geometry (math.DG)
subject: Spectral Theory (math.SP)
subject: FOS: Mathematics
subject: 58C40, 53C25

description: We study the spectrum of the Laplacian on hyperbolic 3-manifolds with Dehn surgery type singularities and its dependence on the generalized Dehn surgery coefficients.
description: Minor corrections, Proof of Theorem 5.1 shortened
AGN STORM 2: I. First results: A Change in the Weather of Mrk 817
Creators: name: Kara, Erin
name: Mehdipour, Missagh
name: Kriss, Gerard A.
name: Cackett, Edward M.
name: Arav, Nahum
name: Barth, Aaron J.
name: Byun, Doyee
name: Brotherton, Michael S.
name: De Rosa, Gisella
name: Gelbord, Jonathan
name: Santisteban, Juan V. Hernandez
name: Hu, Chen
name: Kaastra, Jelle
name: Landt, Hermine
name: Li, Yan-Rong
name: Miller, Jake A.
name: Montano, John
name: Partington, Ethan
name: Aceituno, Jesus
name: Bai, Jin-Ming
name: Bao, Dongwei
name: Bentz, Misty C.
name: Brink, Thomas G.
name: Chelouche, Doron
name: Chen, Yong-Jie
name: Bonta, Elena Dalla
name: Dehghanian, Maryam
name: Du, Pu
name: Edelson, Rick
name: Ferland, Gary J.
name: Ferrarese, Laura
name: Fian, Carina
name: Filippenko, Alexei V.
name: Fischer, Travis
name: Goad, Michael R.
name: Buitrago, Diego H. Gonzalez
name: Gorjian, Varoujan
name: Grier, Catherine J.
name: Guo, Wei-Jian
name: Hall, Patrick B.
name: Homayouni, Y.
name: Horne, Keith
name: Ilic, Dragana
name: Jiang, Bo-Wei
name: Joner, Michael D.
name: Kaspi, Shai
name: Kochanek, Christopher S.
name: Korista, Kirk T.
name: Kynoch, Daniel
name: Li, Sha-Sha
name: Liu, Jun-Rong
name: Hardy, Ian M. Mc
name: McLane, Jacob N.
name: Mitchell, Jake A. J.
name: Netzer, Hagai
name: Olson, Kianna A.
name: Pogge, Richard W.
name: Popovic, Luka C.
name: Proga, Daniel
name: Storchi-Bergmann, Thaisa
name: Strasburger, Erika
name: Treu, Tommaso
name: Vestergaard, Marianne
name: Wang, Jian-Min
name: Ward, Martin J.
name: Waters, Tim
name: Williams, Peter R.
name: Yang, Sen
name: Yao, Zhu-Heng
name: Zastrocky, Theodora E.
name: Zhai, Shuo
name: Zu, Ying
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present the first results from the ongoing, intensive, multi-wavelength monitoring program of the luminous Seyfert 1 galaxy Mrk 817. While this AGN was, in part, selected for its historically unobscured nature, we discovered that the X-ray spectrum is highly absorbed, and there are new blueshifted, broad and narrow UV absorption lines, which suggest that a dust-free, ionized obscurer located at the inner broad line region partially covers the central source. Despite the obscuration, we measure UV and optical continuum reverberation lags consistent with a centrally illuminated Shakura-Sunyaev thin accretion disk, and measure reverberation lags associated with the optical broad line region, as expected. However, in the first 55 days of the campaign, when the obscuration was becoming most extreme, we observe a de-coupling of the UV continuum and the UV broad emission line variability. The correlation recovers in the next 42 days of the campaign, as Mrk 817 enters a less obscured state. The short CIV and Ly alpha lags suggest that the accretion disk extends beyond the UV broad line region.
description: 28 pages, 14 figures, submitted to ApJ. Comments welcome
Solar stills : performance and economics
Creators: name: Zahrastnik, Ninoslav
Publisher: name: The University of Texas at Austin
Year: 1982
Subjects: subject: Solar stills

description: Performance and economic analysis of shallow basin type solar stills is given in this work. A simple FORTRAN program for transient performance of solar stills ( SOLST ) has been developed based on the physical model developed in chapter two. This program, together with a solar still economics model (chapter four), can be used for evaluation of a variety of proposed or existing solar still plants. A simple example is presented (chapter five), which shows that changes in certain design parameters (insulation and side wall thickness) affect the overall performance and cost effectiveness of solar stills. That is, for given meteorologic and economic circumstances, there is an optimal still design which will provide fresh water at the minimum cost
Light Curve Calculations of Supernovae from Fallback Gamma-Ray Bursts
Creators: name: Fryer, Chris L.
name: Hungerford, Aimee L.
name: Young, Patrick A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The currently-favored model for long-duration gamma-ray bursts (GRBs) invokes explosions from the collapse of a massive star down to a black hole: either directly or through fallback. Those GRBs forming via fallback will produce much less radioactive nickel, and hence it has been argued (without any real calculation) that these systems produce dim supernovae. These fallback black-hole GRBs have been recently been argued as possible progenitors of a newly discovered set of GRBs lacking any associated supernovae. Here we present the first ever radiation-hydrodynamics calculations of the light-curves produced in the hypernova explosion by a delayed-fallback gamma-ray burst. We find that the bolometric light-curve is dominated by shock-deposited energy, not the decay of radioactive elements. As such, observations of such bursts actually probe the density in the progenitor wind more than it does the production of radioactive nickel.
description: 11 pages (including 3 figures), submitted to ApJ, comments welcome