cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Analysis of drought patterns in the Tano river basin of Ghana
Creators: name: Nasirudeen, Abdul Fatawu
name: Kabo-Bah, Amos T.
name: Amo-Boateng, Mark
name: Karthikeyan, Brindha
Publisher: name: Freie Universität Berlin
Year: 2021
Subjects: subject: Drought severity
subject: SPI
subject: RDI
subject: Surface water
subject: Precipitation
subject: Climate change
subject: 500 Naturwissenschaften und Mathematik::550 Geowissenschaften, Geologie::550 Geowissenschaften

description: The objective of this study is to analyze drought patterns in the Tano River Basin (TRB) of Ghana using Standardized Precipitation Index (SPI) and Reconnaissance Drought Index (RDI). Precipitation data from 1981 to 2019 for the TRB was accessed from Climate Hazards Group InfraRed Precipitation with Station data (CHIRPS), extracted into time Series using Python to four locations within the basin and used for the analysis together with the National Aeronautics and Space Administration (NASA) POWER (Prediction Of Worldwide Energy Resource) Temperature data. Anderson-Darling test was performed to check for the normality of the precipitation. Two separate station data sets from TAHMO and Earth Observation Research Innovation Centre (EORIC) were used to validate the CHIRPS data. The Scaler Index (SI) from the two data sets are respectively 0.383 and 0.016. This indicates the CHIRPS data extracted is sufficiently accurate. The SPI and RDI on the time scales of 1, 3, 6 and 12 months were calculated using the Drought Indices Calculator (DrinC) software and characterized into the magnitude, duration, and severity of the drought. Regression analysis was performed to compare RDI and SPI values. The results show that the coefficient of regression R2 is 0.9789, 0.9689 and 0.8799 for 1, 6 and 12 months respectively. This indicates a stronger correlation between SPI and RDI values. However, R2 is observed to decreases with increasing time scale, which means for shorter time scales, SPI and RDI are more similar than for longer time scales. To further examine the possible impacts of climate change on the drought profile of the basin, the Mann-Kendall trend test was conducted to compare the trends in SPI and RDI for 1, 6 and 12 timescales. Apart from RDI 6 for Tanoso which recorded a decrease in trend of – 0.17 as against 0.14 of SPI 6, all other timescales recorded an increase in trend for RDI as compared to SPI. Although most of these increases in trend is not significant at 10% significance level, a trend of 1.95 and 1.71 of RDI 1 for Buako and Sepremboi respectively were significant compared to that of SPI 1 for same stations. These increases in trend of RDI as compared to SPI suggests the possible impact of climate change since RDI estimation takes into consideration potential evapotranspiration (PET), which is a factor of temperature. This could have negative implications on agricultural production and drinking water supply within the basin considering that the basin solely relies on surface water for crop production and drinking water supply.
EFFETTO DELLA LEPTINA SULLA REGOLAZIONE DELL’INSORGENZA E DELLA PROGRESSIONE DEI TUMORI
Creators: name: Fusco, Roberta
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2009

description: L’obesità è attualmente considerata una vera e propria patologia ed è associata, come fattore di rischio, all’insorgere delle principali malattie croniche: malattie cardiovascolari, ictus, diabete e alcuni tipi di tumori, quali il cancro delle ovaie e della mammella in post-menopausa e della colecisti (Denni et all., 2007). Nonostante la relazione tra obesità e sviluppo di alcuni tumori sia ormai comprovata, restano ancora da chiarire i meccanismi attraverso i quali si manifesta questa associazione. La leptina, una proteina non glicosilata di 16 kDa secreta principalmente dal tessuto adiposo, è una molecola fondamentale per l’organismo in quanto, come molti ormoni, è implicata in numerosi processi. La leptina stimola il normale sviluppo degli organi riproduttivi, infatti, individui che presentano una mutazione nel gene della leptina risultano essere ipogonadici e spesso sterili.
A near-infrared/optical/X-ray survey in the centre of sigma Orionis
Creators: name: Caballero, José A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Because of the intense brightness of the OB-type multiple star system sigma Ori, the low-mass stellar and substellar populations close to the centre of the very young sigma Orionis cluster is poorly know. I present an IJHKs survey in the cluster centre, able to detect from the massive early-type stars down to cluster members below the deuterium burning mass limit. The near-infrared and optical data have been complemented with X-ray imaging. Ten objects have been found for the first time to display high-energy emission. Previously known stars with clear spectroscopic youth indicators and/or X-ray emission define a clear sequence in the I vs. I-Ks diagram. I have found six new candidate cluster members that follow this sequence. One of them, in the magnitude interval of the brown dwarfs in the cluster, displays X-ray emission and a very red J-Ks colour, indicative of a disc. Other three low-mass stars have excesses in the Ks band as well. The frequency of X-ray emitters in the area is 80+/-20 %. The spatial density of stars is very high, of up to 1.6+/-0.1 arcmin-2. There is no indication of lower abundance of substellar objects in the cluster centre. Finally, I also report two cluster stars with X-ray emission located at only 8000-11000 AU to sigma Ori AB, two sources with peculiar colours and an object with X-ray emission and near-infrared magnitudes similar to those of previously-known substellar objects in the cluster.
description: Accepted for publication in Astron. Nachr. It has not been edited for language yet
ESC Supernova spectroscopy of non-ESC targets
Creators: name: Harutyunyan, A. H.
name: Pfahler, P.
name: Pastorello, A.
name: Taubenberger, S.
name: Turatto, M.
name: Cappellaro, E.
name: Benetti, S.
name: Elias-Rosa, N.
name: Navasardyan, H.
name: Valenti, S.
name: Stanishev, V.
name: Patat, F.
name: Riello, M.
name: Pignata, G.
name: Hillebrandt, W.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the spectra of 36 Supernovae (SNe) of various types, obtained by the European Supernova Collaboration. Because of the spectral classification and the phase determination at their discovery the SNe did not warrant further study, and the spectra we present are the only available for the respective objects. In this paper we present and discuss this material using a new software for the automated classification of SNe spectra. As a validation of the software, we verify the classification and phase estimate reported for these objects in their discovery / classification circulars. For the comparison, the software uses the library of template spectra of Padova-Asiago Supernova Archive (ASA). For each spectrum of our sample we present a brief, individual discussion, highlighting the main characteristics and possible peculiarities. The comparison with ASA spectra confirms the previous classification of all objects and refines the age estimates. For our software we determine numerical limits of "safe" spectral classification and the uncertainties of the phase determination.
description: 22 pages, accepted for publication in A&A
Shear Viscosity from AdS Born-Infeld Black Holes
Creators: name: Cai, Rong-Gen
name: Sun, Ya-Wen
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We calculate the shear viscosity in the frame of AdS/CFT correspondence for the field theory with a gravity dual of Einstein-Born-Infeld gravity. We find that the ratio of $η/s$ is still the conjectured universal value $1/4π$ at least up to the first order of the Born-Infeld parameter $1/b^2$.
description: 10pages, no figures; v2, version to appear in JHEP
Impact-related crystallization and modification of small zircons in Apollo 15 and 16 impactites at 4.2 Ga
Creators: name: Vanderliek, Dennis Marcel
name: Becker, Harry
name: Rocholl, Alexander
Publisher: name: Freie Universität Berlin
Year: 2021
Subjects: subject: Moon
subject: Impact
subject: Zircon
subject: Apollo 15
subject: Apollo 16
subject: U-Pb Geochronolgy
subject: 500 Naturwissenschaften und Mathematik::520 Astronomie::520 Astronomie und zugeordnete Wissenschaften

description: Because of their robustness against resetting, in situ U-Pb ages of zircons in lunar impactites have the potential to provide constraints on the lunar bombardment history that may complement the more common K-Ar ages. Most previous work has focused on relatively large zircons that show growth zoning and ages were mostly interpreted as early igneous crystallization ages. Here we combine high-resolution mineralogical imaging and in situ U-Pb dating by ion microprobe to identify, characterize and date <20 μm size zircons in thin sections of lunar impact breccias. Several tens of grains of zircons of this size range were identified in thin sections of impactites from the Apollo 15 and 16 landing sites. Small zircons are more abundant in both noritic and evolved clinopyroxene, SiO2 or K-feldspar bearing lithologies compared to anorthositic bulk compositions. Both granular zircon aggregates and overgrowth on existing zircon or baddeleyite (in breccias 15455 and 67915) are interpreted to reflect high-temperature recrystallization of zircons or its high-temperature-pressure precursor phases, following shock heating events by impact. In contrast, conchoidal or poikilitic zircons <10 μm in Fe-Ni metal bearing noritic clasts or matrix (67915, 67955) crystallized in situ from impact melt. Most U-Pb ages of the 24 analyzed grains are either concordant or reverse discordant with 207Pb-206Pb ages ranging from 4.15 to 4.25 Ga. The small age range, combined with a large textural spectrum and the frequent presence of Fe-Ni metal suggest zircon crystallization from impact melt and recrystallization of pre-existing zirconium-bearing minerals by impact heating. Such ‘impact’ zircons with 4.2 Ga ages have now been reported from most Apollo landing sites, suggesting widespread formation and modification of zircons by basin-forming impacts at this time. The contrast between U-Pb zircon (predominantly 4.2 Ga) and K-Ar feldspar ages (predominantly 3.9 Ga) likely reflects resetting of the latter chronometer by impact heating.
Conservation laws in recombination kinetic theory
Creators: name: Sze, Pui King Ivy
Publisher: name: University of British Columbia
Year: 2010

description: The hydrodynamic equations of change for a reacting gas mixture of monomers and dimers are studied. The gas is considered to be dilute and described by the kinetic theory of Lowry and Snider (J. Chem. Phys. 61, 2320 (1974)). From the kinetic equations for the density operators representing the monomer and dimer, the equations of change for one-molecule observables are obtained. Since the energy operator involves the intermolecular potential energy, it is necessary to derive the energy balance equation from the von Neumann equation, since this includes molecule-molecule correlations. As well, the kinetic theory formulated by Lowry and Snider is rewritten so that rearrangement collisions are emphasized. A collisional sum rule is derived involving the commutation properties of channel projectors and their respective potentials. A known property of the optical theorem is that it identifies the reactive loss terms as part of the non-reactive transition superoperators. The sum rule is applied to rewrite the non-reactive transition superoperators so as to display the reactive loss terms. This aids in establishing conservation laws for the physical observables of mass, linear momentum, angular momentum and energy. A form of the optical theorem in which kinetic energy off-diagonality is allowed for is also derived. Both the optical theorem and the sum rule are based on the strong orthogonality hypothesis, which plays a fundamental role in the Lowry-Snider theory. On localising the physical attributes at the centres of mass of the molecules, the contributions to the equations of change from collisional transfer (due to the forces and torques between the collision partners) and from the transfer of the physical attributes from the reactants to the products are identified. The transformation of dimer internal degrees of freedom into monomer translational degrees of freedom or vice versa when a dimer Is dissociated or formed is found to contribute to the equations of change by virtue of the differing locality of the collision partners. The decomposition of the kinetic energy operator into its components for radial and rotational motions allows the kinetic energy flux contributions associated with the pressure tensor and the molecular angular momentum flux to be identified.
Impact of an AMOC weakening on the stability of the southern Amazon rainforest
Creators: name: Ciemer, Catrin
name: Winkelmann, Ricarda
name: Kurths, Jürgen
name: Boers, Niklas
Publisher: name: Freie Universität Berlin
Year: 2021
Subjects: subject: Atlantic Meridional Overturning Circulation
subject: AMOC
subject: Amazon rainforest
subject: 500 Naturwissenschaften und Mathematik::550 Geowissenschaften, Geologie::550 Geowissenschaften

description: The Atlantic Meridional Overturning Circulation (AMOC) and the Amazon rainforest are potential tipping elements of the Earth system, i.e., they may respond with abrupt and potentially irreversible state transitions to a gradual change in forcing once a critical forcing threshold is crossed. With progressing global warming, it becomes more likely that the Amazon will reach such a critical threshold, due to projected reductions of precipitation in tropical South America, which would in turn trigger vegetation transitions from tropical forest to savanna. At the same time, global warming has likely already contributed to a weakening of the AMOC, which induces changes in tropical Atlantic sea-surface temperature (SST) patterns that in turn affect rainfall patterns in the Amazon. A large-scale decline or even dieback of the Amazon rainforest would imply the loss of the largest terrestrial carbon sink, and thereby have drastic consequences for the global climate. Here, we assess the direct impact of greenhouse gas-driven warming of the tropical Atlantic ocean on Amazon rainfall. In addition, we estimate the effect of an AMOC slowdown or collapse, e. g. induced by freshwater flux into the North Atlantic due to melting of the Greenland Ice Sheet, on Amazon rainfall. In order to provide a clear explanation of the underlying dynamics, we use a simple, but robust mathematical approach (based on the classical Stommel two-box model), ensuring consistency with a comprehensive general circulation model (HadGEM3). We find that these two processes, both caused by global warming, are likely to have competing impacts on the rainfall sum in the Amazon, and hence on the stability of the Amazon rainforest. A future AMOC decline may thus counteract direct global-warming-induced rainfall reductions. Tipping of the AMOC from the strong to the weak mode may therefore have a stabilizing effect on the Amazon rainforest.
Coulomb corrections to the Delbrueck scattering amplitude at low energies
Creators: name: Kirilin, G. G.
name: Terekhov, I. S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this article, we study the Coulomb corrections to the Delbrueck scattering amplitude. We consider the limit when the energy of the photon is much less than the electron mass. The calculations are carried out in the coordinate representation using the exact relativistic Green function of an electron in a Coulomb field. The resulting relative corrections are of the order of a few percent for scattering on for a large charge of the nucleus. We compare the corrections with the corresponding ones calculated through the dispersion integral of the pair production cross section and also with the magnetic loop contribution to the g-factor of a bound electron. The last one is in a good agreement with our results but the corrections calculated through the dispersion relation are not.
description: 8 pages, 6 figures
Nice Points Collection Volume 1
Creators: name: Huda, Sokhi
Publisher: name: Zenodo
Year: 2018
Subjects: Collection
Nice Points

description: The collection of nice points is sourced from Sokhi Huda’s various papers. This volume 1 presents 12 nice points; (1) Martin's Islamic Studies Approaches, (2) the Contemporary Thought of Muhammad Shahrur, (3) the Contemporary Thought of Amina Wadud, (4) the Modern Thought of Muhammadiyah, (5) Theology of Mustad`afin Indonesia, (6) the West and Islamic Fundamentalism, (7) Global Salafism, (8) Contemporary Terrorism in the Islamic World, (9) Islam and Politics, (10) Pragmatism of William James, (11) New Statement of Wittgenstein, (12) Scientific Language Profile.
Morfologia dei fluidi complessi: “Effetti viscoelastici sulla deformazione di gocce di blend polimerici in flusso di shear tra piatti paralleli”
Creators: name: Sibillo, Vincenzo
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2006

description: A complete three-dimensional shape of an isolated drop in an immiscible liquid phase undergoing simple shear flow with non Newtonian fluids was investigated by contrast-enhanced optical microscopy. Drop was observed either along the vorticity direction or along the velocity gradient direction of the shear flow. The effects on drop deformation and break up of the viscoelastic content of the liquid phases were investigated. Two situation of a viscoelastic matrix with a Newtonian drop and of viscoelastic drop in a Newtonian matrix are considered. When possible my data are compared with theoretical or phenomenological predictions. Finally I investigated also the influence of confinement on the steady state of the drop in a regime where drop diameter is comparable to gap width between the shearing parallel plates.
Accelerated expansion induced by Dark Matter with two charges
Creators: name: Hansen, Steen H.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: The accelerated expansion of the universe has been established through observations of supernovae, the growth of structure, and the cosmic microwave background. The most popular explanation is Einsteins cosmological constant, or dynamic variations hereof. A recent paper demonstrated that if dark matter particles are endowed with a repulsive force proportional to the internal velocity dispersion of galaxies, then the corresponding acceleration of the universe may follow that of a cosmological constant fairly closely. However, no such long-range force is known to exist. A concrete example of such a force is derived here, by equipping the dark matter particles with two new dark charges. This result lends support to the possibility that the current acceleration of the universe may be explained without the need for a cosmological constant.
description: 5 pages, no figure, accepted by MNRAS
Caratterizzazione metodologica FEM per la valutazione al crash delle autovetture
Creators: name: Pirozzi, Michele
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2006

description: [ITALIANO] Sviluppo di una metodologia agli elementi finiti per simulare una prova di crash secondo le normative EuroNcap. / [ENGLISH] Finite Element Metodology to simulate a full EuroNcap test
Meson and glueball spectra with the relativistic flux tube model
Creators: name: Buisseret, F.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The mass spectra of heavy and light mesons is computed within the framework of the relativistic flux tube model. A good agreement with the experimental data is obtained provided that the flux tube contributions, including retardation and spin-orbit effects, are supplemented by a one-gluon-exchange potential, a quark self-energy term and instanton-induced interactions. No arbitrary constant is needed to fit the absolute scale of the mass spectra, and the different parameters are fitted on lattice QCD in order to strongly restrict the arbitrariness of our model. The relevance of the present approach is discussed in the case of glueballs, and the glueball spectrum we compute is compared to the lattice QCD one. Finally, we make connections between the results of our model and the nature of some newly discovered experimental states such as the f_0(1810), X(3940), Y(3940), etc.
description: 34 pages, 3 tables, 7 figures; references added and corrected in version 2; version 3 accepted in PRC, new results added concerning light mesons
Analysis of a bistable climate toy model with physics-based machine learning methods
Creators: name: Gelbrecht, Maximilian
name: Lucarini, Valerio
name: Boers, Niklas
name: Kurths, Jürgen
Publisher: name: Freie Universität Berlin
Year: 2021
Subjects: subject: Analysis
subject: bistable climate toy model
subject: physics-based machine learning methods
subject: 500 Naturwissenschaften und Mathematik::530 Physik::530 Physik

description: We propose a comprehensive framework able to address both the predictability of the first and of the second kind for high-dimensional chaotic models. For this purpose, we analyse the properties of a newly introduced multistable climate toy model constructed by coupling the Lorenz ’96 model with a zero-dimensional energy balance model. First, the attractors of the system are identified with Monte Carlo Basin Bifurcation Analysis. Additionally, we are able to detect the Melancholia state separating the two attractors. Then, Neural Ordinary Differential Equations are applied to predict the future state of the system in both of the identified attractors.
Novel eudesmanolides from the flowers of Pentanema britannicum (L.) D.Gut.Larr with antidepressant activities
Creators: name: Xie, Yu-Qing
name: Zhang, Xin-Yue
name: Zhang, Jun-Hui
name: He, Ping
name: Yang, Sheng-He
name: Fu, Yan
name: Ni, Zhi-Yu
name: Su, Jian
name: Gu, Yu-Cheng
name: Wu, Yi-Bing
Publisher: name: Taylor & Francis
Year: 2025
Subjects: subject: Biochemistry
subject: Pharmacology
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Biological Sciences not elsewhere classified

description: From the flowers of Pentanema britannicum (L.) D.Gut.Larr., three new eudesmanolides, britannitin A (1), britannitin B (2) and britannitin C (3), as well as 17 known compounds, were successfully extracted. Compounds 1-3 were eudesmane sesquiterpene lactones with a rare -C = C- linking carbons 7 and 11. Structural determination of the separated compounds was achieved through a range of spectroscopic techniques, such as 1D and 2D NMR analyses. Compound 5β-hydroxyasperilin (HA) demonstrated the ability to ameliorate depression-like behaviours in mice induced by CSDS, suggesting its potential antidepressant effect.
Multiferroic nature of charge-ordered rare earth manganites
Creators: name: Serrao, Claudy Rayan
name: Sundaresan, A
name: Rao, C N R
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Charge-ordered rare earth manganites Nd0.5Ca0.5MnO3, La0.25Nd0.25Ca0.5MnO3, Pr0.7Ca0.3MnO3 and Pr0.6Ca0.4MnO3 are found to exhibit dielectric constant anomalies around the charge-ordering or the magnetic transition temperatures. Magnetic fields have a marked effect on the dielectric properties, indicating the presence of coupling between the magnetic and electrical order parameters. The observation of magnetoferroelectricity in these manganites is in accord with the recent theoretical predictions of Khomskii and coworkers.
Dark Galaxies in the A1367 Galaxy Cluster
Creators: name: Henriksen, Mark J.
name: Dusek, Scott
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We have characterized a sample of extended X-ray sources in the A1367 galaxy cluster that lack optical counterparts. The sources are galaxy size and have an average total mass of $1.3\times10^{11}$ solar masses. The average hot gas mass is $3.0\times10^{9}$ solar masses and the average X-ray luminosity is $4.3\times10^{41}$ erg cm$^{-2}$ s$^{-1}$. Analysis of a composite source spectrum indicates the X-ray emission is thermal, with temperature of 1.25 - 1.45 keV and has low metallicity, 0.026 - 0.067 solar. The average hot gas radius (12.7 kpc) is well matched to nominal stripping radius. We argue that this optically dark, X-ray bright galaxy population forms by a sequence of stripping followed by heating and mixing with the intracluster medium.
Excited-state spectroscopy of single NV defects in diamond using optically detected magnetic resonance
Creators: name: Neumann, P.
name: Kolesov, R.
name: Jacques, V.
name: Beck, J.
name: Tisler, J.
name: Batalov, A.
name: Rogers, L.
name: Manson, N. B.
name: Balasubramanian, G.
name: Jelezko, F.
name: Wrachtrup, J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Using pulsed optically detected magnetic resonance techniques, we directly probe electron-spin resonance transitions in the excited-state of single Nitrogen-Vacancy color centers in diamond. Unambiguous assignment of excited state fine structure is made, based on changes of NV defect photoluminescence lifetime. This study provides significant insight into the structure of the emitting 3E excited state, which is invaluable for the development of diamond-based quantum information processing.
description: 10 pages, 4 figures
title: A study of the role of an Unmanned Aerial Vehicle (UAV) in creating an Enhanced Virtual Field Guide (EVFG) in Geoscience Fieldwork
Creators: name: Cliffe, AD
Publisher: name: Liverpool John Moores University
Year: 2019

description: This thesis investigated the role of an Unmanned Aerial Vehicle (UAV) in the creation of an Enhanced Virtual Field Guide (EVFG) in Geoscience fieldwork. This research used a pragmatic mixed methods approach to investigate the research question “How can an Unmanned Aerial Vehicle’s data be used to create an Enhanced Virtual Field Guide for Geoscience fieldwork?” The thesis examines the question in four distinct sections; fieldwork, mobile technologies in fieldwork, UAVs in fieldwork and finally, the creation and evaluation of the Enhanced Virtual Field Guide created by UAV technology. To achieve this, online questionnaires, interviews, focus groups and fieldwork observations with a selection of Geoscience staff and students at two UK Universities were utilised. UAVs are a rapidly emerging commercial technology, however, their uptake and critical discussion around their potential in fieldwork with students has been limited. This study created with the guidance of those interviewed in this research, an innovative Enhanced Virtual Field Guide for students to utilise in their final year fieldwork module and assignment. Findings from this research with regards to fieldwork and mobile technologies confirms that fieldwork and mobile technologies are still an integral part of a geoscience students course and the majority of students still greatly enjoy the positive aspects of fieldwork. However, this research has discovered many unexplored darker sides of fieldwork and mobile technology use in fieldwork, such as disabilities, distractions, and lack of access for some students. In terms of the educational value of UAVs, this research showcases the many potential benefits for the fieldwork experience. Yet, this thesis highlights the many distinct and unique challenges that are attributed to UAV technologies that have and will continue to hinder their uptake on fieldwork. The value of this EVFG developed from a UAV has been shown to be a useful tool for educators and students on fieldwork as examined in this thesis, such as an improvement of efficiency in the field, deeper and more peer learning discussions in the field and for it to be an effective learning tool for both educators and students, particularly post-fieldwork.
Synthesis and characterisation of ruthenium octaethylporphyrin complexes
Creators: name: Sishta, Chand
Publisher: name: University of British Columbia
Year: 2010

description: The synthesis and characterisation of some higher valent Ru octaethylporphyrin complexes are discussed. These complexes, Ru(OEP)(X)(X’) (X=X'=Br,Cl and X=SbF₆,X'=THF) are of the oxidation state IV and III, respectively, with either a triplet d⁴, S=l intermediate spin ground state (for X=X'=Br, CI) or a d⁵, S=1/2 low spin (for X=SbF₆,X'=THF) ground state. The alternative Ru[sup III] or Ru[sup II] π-cation radical formulations are ruled out. The first Ru-X bond frequencies (X=Br,179 cm⁻¹;X=Cl,289 cm⁻¹ KBr) in Ru-porphyrin systems are assigned. The ¹H NMR data indicate that contact contributions dominate the isotropic shifts but dipolar relaxation is responsible for the relaxation of the resonances observed. The metal-porphyrin π-bonding arises from ligand-to-metal charge transfer in all three complexes and the Ru[sup III]:(SbF₆) complex likely has a μ-fluoro bridge with μsb-F = 650 cm⁻¹, Nujol. The simple preparative reactions have high yields (>80%) and the stability of these complexes make them excellent precursors for further chemistry in high-valent ruthenium porphyrins.
U. S. Agricultural Export Shares by Regions and States, Fiscal Year 1963-64
Creators: name: Tontz, Robert L.
name: Angelidis, Alex D.
name: Tontz, Robert L.
name: Angelidis, Alex D.
Publisher: name: Unknown
Year: 1964
Subjects: Agricultural and Food Policy
International Relations/Trade
Labor and Human Capital
Research Methods/ Statistical Methods

description: Excerpts from the Report: The export market in fiscal year 1963-64 provided an outlet for three-fourths of U.S. wheat production; two-thirds of the rice and nonfat dry milk; half of the dry edible peas; over two-fifths of the tallow, soybeans, and hops; about a third of the cotton, rye, prunes, and dried whole milk; around a fourth of the lard and tobacco; and one-fifth of the raisins, dry edible beans, cottonseed, grain sorghums, and barley. Every important U.S. farming region and State has a significant stake in the export market for agricultural products. This article presents the results of a study which indicates the magnitude and significance of this stake among the regions and States. The study includes an analysis of the national agricultural export situation; a discussion of the institutional and economic background of national, regional, and State foreign trade; a review of the methodology used in deriving the regional and State agricultural export shares; a discussion and listing of the regional and State export shares; and a summary by regions and States of the number of farm workers whose jobs are attributable to agricultural exports.
description: Reprinted from Foreign Agricultural Trade of the United States November-December 1964
Role of Interleukin-18 in vascular injury: a new pharmacological target for the prevention of restenosis
Creators: name: Grassia, Gianluca
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2006

description: Background: Studies in humans as well as in animal models suggest that interleukin-18 (IL-18) plays a crucial role in vascular pathologies. IL-18 is a strong predictor of cardiovascular death in angina and is involved in atherotic plaque destabilization. Higher IL-18 plasma levels are also associated with restenosis after coronary artery angioplasty performed in patients with acute myocardial infarction. We investigated the effective role of IL-18 in neointima formation in a rat model of vascular injury, known as balloon angioplasty.
Methods and Results: Endothelial denudation of the left carotid artery was performed by using a balloon embolectomy catheter. Increased expression of IL-18 and IL-18Rα/β mRNA was detectable in carotid arteries from day 2 to 14 after angioplasty. The active form of IL-18 was highly expressed in injured arteries. Strong immunoreactivity for IL-18 was detected in the medial smooth muscle cells at day 2 and 7 after balloon injury and in proliferating/migrating smooth muscle cells in neointima at day 14. Moreover, serum concentrations of IL-18 were significantly higher among rats subjected to vascular injury. Rats treatment with neutralizing rabbit anti-rat IL-18 IgG significantly reduced by 27% (P<0.01) neointima formation. In addition, IL-18 neutralization reduced number of proliferating cells, inhibited IFN-γ, IL-6, IL-8 mRNA expression and nuclear factor-κB activation in injured arteries.
Conclusions: These results identify for the first time a critical role for IL-18 in neointima formation in a rat model of vascular injury and suggest a potential role for IL-18 neutralization in reduction of neointima development and progression.
Anomalously Small Excitation Gaps as a Precursor of Dislocation Core Superfluidity in Solid Helium-4
Creators: name: Kuklov, Anatoly
name: Polturak, Emil
name: Prokof'ev, Nikolay
name: Svistunov, Boris
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: In the vicinity of the insulator-to-superfluid quantum phase transition in its core, a dislocation in a He-4 crystal supports particle-hole excitations with arbitrary small gaps. These exotic analogs of Frenkel interstitial-vacancy pairs should manifest themselves in various threshold and thermoactivation effects. In Worm Algorithm simulations, we reveal the presence of corresponding small gaps via anomalous thermoactivation behavior of particle number fluctuations, which we unambiguously associate with dislocations by "visualization" techniques. Experimentally, the related threshold and thermoactivation dependencies could be observed in the ultrasound absorption.
description: arXiv admin note: substantial text overlap with arXiv:2103.08011
Particle physics with a laser-driven positronium atom
Creators: name: Müller, Carsten
name: Hatsagortsyan, Karen Z.
name: Keitel, Christoph H.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A detailed quantum-electrodynamic calculation of muon pair creation in laser-driven electron-positron collisions is presented. The colliding particles stem from a positronium atom exposed to a superintense laser wave of linear polarization, which allows for high luminosity. The threshold laser intensity of this high-energy reaction amounts to a few 10^22 W/cm^2 in the near-infrared frequency range. The muons produced form an ultrarelativistic, strongly collimated beam, which is explicable in terms of a classical simple-man's model. Our results indicate that the process can be observed at high positronium densities with the help of present-day laser technology.
description: 4 pages, 3 figures
ISME31_204_3-PUBLISHED.pdf
Creators: name: Mansouri, Amirhosein
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 401002
subject: Engineering education

description: Engineering education is as old as engineering sciences. It has always provided the basis for the transfer and advancement of these sciences. However, this topic itself may not be updated, unlike engineering sciences that have made a lot of progress in recent years, which causes problems in transferring scientific concepts. For this reason, as engineering sciences are growing rapidly, engineering education needs to find a modern structure and discard traditional methods that have many disadvantages or eliminate those disadvantages. This article is based on methods based on Discovery learning and offers an example of a modern educational method that is formed from the combination of engineering sciences and geography. Finally, as an examination of the strengths of this method, 21 students were asked to express their opinion about this sample. In order to provide an example of engineering education with the help of this method, we have used boost converter relationship education.
Boundedness of Schroedinger type propagators on modulation spaces
Creators: name: Cordero, Elena
name: Nicola, Fabio
Publisher: name: arXiv
Year: 2008
Subjects: subject: Functional Analysis (math.FA)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35S30, 47G30

description: It is known that Fourier integral operators arising when solving Schrödinger-type operators are bounded on the modulation spaces $\cM^{p,q}$, for $1\leq p=q\leq\infty$, provided their symbols belong to the Sjöstrand class $M^{\infty,1}$. However, they generally fail to be bounded on $\cM^{p,q}$ for $p\not=q$. In this paper we study several additional conditions, to be imposed on the phase or on the symbol, which guarantee the boundedness on $\cM^{p,q}$ for $p\not=q$, and between $\cM^{p,q}\to\cM^{q,p}$, $1\leq q< p\leq\infty$. We also study similar problems for operators acting on Wiener amalgam spaces, recapturing, in particular, some recent results for metaplectic operators. Our arguments make heavily use of the uncertainty principle.
description: 30 pages
The continuum radio emission from the Sy 1.5 galaxy NGC 5033
Creators: name: Perez-Torres, Miguel A.
name: Alberdi, Antonio
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present new continuum VLA observations of the nearby Sy 1.5 galaxy NGC 5033, made at 4.9 and 8.4 GHz on 8 April 2003. Combined with VLA archival observations at 1.4 and 4.9 GHz made on 7 August 1993, 29 August 1999, and 31 October 1999, we sample the galaxy radio emission at scales ranging from the nuclear regions (
description: Accepted for publication in the Main Journal of MNRAS, 8 pages, 1 figure, 2 tables
ISME31_204_3-PUBLISHED.pdfISME31_204_3-PUBLISHED.pdfIntroduction to DC-DC boost converter with discovery learning
Creators: name: Mansouri, Amirhosein
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 401002
subject: Engineering education

description: Engineering education is as old as engineering sciences. It has always provided the basis for the transfer and advancement of these sciences. However, this topic itself may not be updated, unlike engineering sciences that have made a lot of progress in recent years, which causes problems in transferring scientific concepts. For this reason, as engineering sciences are growing rapidly, engineering education needs to find a modern structure and discard traditional methods that have many disadvantages or eliminate those disadvantages. This article is based on methods based on Discovery learning and offers an example of a modern educational method that is formed from the combination of engineering sciences and geography. Finally, as an examination of the strengths of this method, 21 students were asked to express their opinion about this sample. In order to provide an example of engineering education with the help of this method, we have used boost converter relationship education.
Application of computational models to the study of molecular sensors
Creators: name: Festa, Gaetano
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2006

description: In the present work we have considered various topics concerning spectroscopic properties simulation (Part I) and basic aspects involved in nanoscience (Part II).
In the first part the IR spectra of uracil in vacuo was simulated by the Fourier Transform of the dipole autocorrelation function. This function has been generated by the sampling of the 10 ps ADMP (ab initio Density Matrix Propagation) trajectory.
The results were compared with the experimental spectra of uracil in argon matrix so as to reproduce as much as possible the neglect of intermolecular interaction characteristic of the current simulation conditions. Moreover, the results were also compared with frequencies calculations within harmonic and anharmonic approximations.
In the second part we studied basic aspects related to the synthesis of DNA/RNA biosensors. Full characterization of 1-amino-3cyclopentene (ACP) reaction path along both chemical functionalities was reported outlying the effective competitiveness of both reactions on silicon surface reaction sites. Differently from others works mainly focused on a radicalic mechanism, here we found another mechanism of reaction based on the separation of charges in silicon surface dimer with no radicals formation.
The reaction path through ACP double bond has been studied in collaboration with the Departement of Physics of the University of Naples "Federico II" in order to compare computational results obtained within density functional theory (DFT) with both Gaussian Type Orbitals and Plane Waves basis set functions. To simulate the Si(100)-2x1 surface we used both cluster  and slab models.
Furthermore, it has been considered a further step in the surface functionalization considering the product of reactions of sulfo-succinimidyl-4-(N-maleimidomethyl)-cyclohexane-1-carboxilate (SSMCC) and thio-oligonucleotide on the ACP hybrid surface.
Longitudinally Resolved Spectral Retrieval (ReSpect) of WASP-43b
Creators: name: Cubillos, Patricio E.
name: Keating, Dylan
name: Cowan, Nicolas B.
name: Vos, Johanna M.
name: Burningham, Ben
name: Ygouf, Marie
name: Karalidi, Theodora
name: Zhou, Yifan
name: Gonzales, Eileen C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Thermal phase variations of short period planets indicate that they are not spherical cows: day-to-night temperature contrasts range from hundreds to thousands of degrees, rivaling their vertical temperature contrasts. Nonetheless, the emergent spectra of short-period planets have typically been fit using one-dimensional (1D) spectral retrieval codes that only account for vertical temperature gradients. The popularity of 1D spectral retrieval codes is easy to understand: they are robust and have a rich legacy in Solar System atmospheric studies. Exoplanet researchers have recently introduced multi-dimensional retrieval schemes for interpreting the spectra of short-period planets, but these codes are necessarily more complex and computationally expensive than their 1D counterparts. In this paper we present an alternative: phase-dependent spectral observations are inverted to produce longitudinally resolved spectra that can then be fitted using standard 1D spectral retrieval codes. We test this scheme on the iconic phase-resolved spectra of WASP-43b and on simulated JWST observations using the open-source pyratbay 1D spectral retrieval framework. Notably, we take the model complexity of the simulations one step further over previous studies by allowing for longitudinal variations in composition in addition to temperature. We show that performing 1D spectral retrieval on longitudinally resolved spectra is more accurate than applying 1D spectral retrieval codes to disk-integrated emission spectra, despite being identical in terms of computational load. We find that for the extant Hubble and Spitzer observations of WASP-43b the difference between the two approaches is negligible but that JWST phase measurements should be treated with longitudinally \textbf{re}solved \textbf{spect}ral retrieval (ReSpect).
description: Accepted for publication at The Astrophysical Journal
Quantification of cerebral tissue volumes in multiple sclerosis: global and regional analysis
Creators: name: Prinster, Anna
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2006

description: Brain atrophy has been reported in multiple sclerosis (MS). We addressed the question of GM and WM tissue loss in a large population of 597 patients with multiple sclerosis (MS) compared with 104 control subjects using a fully automated, operator-independent, multiparametric segmentation method. Significant differences between patients with MS and control subjects included reduced fWM and fGM. MRI data showed significant differences between patients with relapsing–remitting and secondary progressive forms of MS: secondary progressive patients have significantly more atrophy of both WM and GM than do relapsing–remitting patients and a significantly higher lesion load. Significant correlations between MRI parameters and between MRI and clinical data were found.
Moreover we addressed the question of if and where GM loss is localized by means of optimized Voxel-Based Morphometry applied to MRI studies of 51 patients with clinically defined Relapsing-Remitting MS and 34 age-matched normal subjects.
In RR-MS patients, GM volume was significantly decreased at the level of the left fronto-temporal cortex and precuneus, as well as of anterior cingulate gyrus and of caudate nuclei bilaterally. The only cortical region of significant GM loss in the right hemisphere was located in the postcentral area.
Our findings suggest that in RR-MS cortical GM reduction preferentially involves left fronto-temporal structures and deep GM, the latter correlating preferentially to global lesion load.
Endocannabinoidi e Fitocannabinoidi nel Cancro
Creators: name: Ligresti, Alessia
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2006

description: [ITALIANO] La neoplasia è la caratteristica comune a tutti i tumori che suggerisce di ricercare soluzioni trasversali alle diverse forme di cancro. Partendo da tale concetto, il presente lavoro di Dottorato è stato incentrato sullo studio di alcune molecole segnale (i ligandi dei recettori dei cannabinoidi, o endocannabinoidi), e di alcuni cannabinoidi di origine vegetale con l’obiettivo di comprenderne l’effetto sullo sviluppo e sulla progressione di diversi tipi di tumore. In particolare è stato analizzato il coinvolgimento degli endocannabinoidi nello sviluppo del cancro colorettale, e sono stati valutati gli effetti di alcuni cannabinoidi da Cannabis su linee cellulari di diversa origine tumorale, esaminandone i possibili meccanismi d’azione. / [ENGLISH] The uncontrolled growth of neoplastic cells is the distinctive tract that connects different kinds of tumours and suggests that therapeutic strategies common to most forms of cancer can be obtained. In the present thesis, starting from this concept, I was involved in the study of the effect on cancer development and growth of the endogenous ligands of cannabinoid receptors (known as endocannabinoids), as well as of various plant cannabinoids. In particular, I focused my attention both on the possible endocannabinoid control of colorectal cancer growth, and on the effect on the growth of a variety of cancer cell lines, and possible mechanism of action, of non-psychotropic plant cannabinoid and Cannabis extracts.