cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
OGLE-2015-BLG-0479LA,B: Binary Gravitational Microlens Characterized by Simultaneous Ground-based and Space-based Observation
Creators: name: Han, C.
name: Udalski, A.
name: Gould, A.
name: Zhu, Wei
name: Street, R. A.
name: Yee, J. C.
name: Beichman, C.
name: Bryden, C.
name: Novati, S. Calchi
name: Carey, S.
name: Fausnaugh, M.
name: Gaudi, B. S.
name: Henderson, Calen B.
name: Shvartzvald, Y.
name: Wibking, B.
name: Szymański, M. K.
name: Soszyński, I.
name: Skowron, J.
name: Mróz, P.
name: Poleski, R.
name: Pietrukowicz, P.
name: Kozłowski, S.
name: Ulaczyk, K.
name: Wyrzykowski, Ł.
name: Pawlak, M.
name: Tsapras, Y.
name: Hundertmark, M.
name: Bachelet, E.
name: Dominik, M.
name: Bramich, D. M.
name: Cassan, A.
name: Jaimes, R. Figuera
name: Horne, K.
name: Ranc, C.
name: Schmidt, R.
name: Snodgrass, C.
name: Wambsganss, J.
name: Steele, I. A.
name: Menzies, J.
name: Mao, S.
name: Bozza, V.
name: Jørgensen, U. G.
name: Alsubai, K. A.
name: Ciceri, S.
name: D'Ago, G.
name: Haugbølle, T.
name: Hessman, F. V.
name: Hinse, T. C.
name: Juncher, D.
name: Korhonen, H.
name: Mancini, L.
name: Popovas, A.
name: Rabus, M.
name: Rahvar, S.
name: Scarpetta, G.
name: Skottfelt, J.
name: Southworth, J.
name: Starkey, D.
name: Surdej, J.
name: Wertz, O.
name: Zarucki, M.
name: Pogge, R. W.
name: DePoy, D. L.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present a combined analysis of the observations of the gravitational microlensing event OGLE-2015-BLG-0479 taken both from the ground and by the {\it Spitzer Space Telescope}. The light curves seen from the ground and from space exhibit a time offset of $\sim 13$ days between the caustic spikes, indicating that the relative lens-source positions seen from the two places are displaced by parallax effects. From modeling the light curves, we measure the space-based microlens parallax. Combined with the angular Einstein radius measured by analyzing the caustic crossings, we determine the mass and distance of the lens. We find that the lens is a binary composed of two G-type stars with masses $\sim 1.0\ M_\odot$ and $\sim 0.9\ M_\odot$ located at a distance $\sim 3$ kpc. In addition, we are able to constrain the complete orbital parameters of the lens thanks to the precise measurement of the microlens parallax derived from the joint analysis. In contrast to the binary event OGLE-2014-BLG-1050, which was also observed by {\it Spitzer}, we find that the interpretation of OGLE-2015-BLG-0479 does not suffer from the degeneracy between $(\pm,\pm)$ and $(\pm,\mp)$ solutions, confirming that the four-fold parallax degeneracy in single-lens events collapses into the two-fold degeneracy for the general case of binary-lens events. The location of the blend in the color-magnitude diagram is consistent with the lens properties, suggesting that the blend is the lens itself. The blend is bright enough for spectroscopy and thus this possibility can be checked from future follow-up observations.
description: 9 pages, 4 figures
title: Fe3+ in garnet and the V/Cr redox proxy: Two methods, one result. Oxygen fugacity of Paleoarchean ky/cor eclogites from the Kaapvaal craton - subducted equivalents of former troctolites
Creators: name: Hoefer, Heidi Eva
name: Shu, Qiao
name: Brey, Gerhard Peter
name: Heckel, Catharina
name: Vasilyev, Prokopiy
Publisher: name: Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
Year: 2022

description:
The Earth’s mantle was at metal saturation shortly after accretion (ΔFMQ ~ -4.5; Frost and McCammon, 2004). This supposedly changed very rapidly to ΔFMQ ~ 0 (= today’s oxidation state of the MORB mantle) due to the disproportionation of Fe2+ in bridgmanite to Fe3+ + Fe0. The latter was transferred to the core leaving an oxidized residue behind. Magmas from the mantle should therefore indicate the same oxygen fugacity through time. This is tested here with 3.2 Ga old kyanite and corundum eclogite xenoliths from the Bellsbank diamond mine on the Kaapvaal craton, i.e. metamorphosed troctolites (= olivine-plagioclase cumulates; Shu et al. 2016).

One method to estimate the oxygen fugacity of troctolites is based on the V/Cr ratio of the accumulating olivine (Mallmann and O’Neill, 2009). Modern day troctolites from the Pacific and the Atlantic form a correlation of V and Cr with a slope corresponding to ΔFMQ ~ 0. The ky/cor eclogites yield a steeper slope corresponding to ΔFMQ ~ -2 meaning that the Fe3+ content of the garnets should be close to zero. Our second method, the determination of Fe3+/ΣFe in garnet with the flank method by EPMA (Hoefer and Brey 2007), gave Fe3+/ΣFe < 0.03 that yielded a mean ΔFMQ value of -1.6 as calculated with the oxybarometer of Vasilyev (2016). This indicates a gradual increase of oxygen fugacity in the mantle after core formation (see also Aulbach and Stagno 2016) and confirms that the oxidation state of Fe can be preserved in eclogites since the Archean.
Assessment on Noise of Addis Ababa Light Rail Transit
Creators: name: Yehalem, Tesera
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2017

description: Rail transport is being one of the major modes of transportation and is becoming a backbone for the development of the country owing to its nature and suitability of the transport system. On the other hand, it is a source of ambient noises resulting in an uncomfortable environment for working and living around railways. Currently. in Ethiopia, a project like Addis Ababa Light Rail Transit transportation is affecting the community. In order to ascertain the effect of Addis Ababa Light Rail Transit on the community, this paper is targeted on noise assessment. So as to conduct this noise assessment, direct measurement of noise in 100 m interval of the track and questionnaires are deployed. In questionnaire around 200 peoples are interviewed. To this end, results from a detailed questionnaire and measured values, which examine the effects of the noise on the people living around railways are analyzed and illustrated in graph and table. The results are correlated as day time noise and night time noise with the Ethiopian noise standard which are 65dB (A) for day time and 55dB (A) for night time. From the measurement result, the day time noise is 84.18dB (A) and the night time noise is 57.18dB (A). When the results are compared to the standard, the day time noise is greater than the standard and the night time noise is normal (considering the instrument accuracy which is 2dB). The result also includes the questionnaire and it shows that as the age increases the noise sensitivity will also increase. The results are also correlated to indoor noise and outdoor noise with a feasibility study of Addis Ababa Light Rail Transit (i.e. environmental assessment section) in order to scrutinize the operational time noise with the one that intended to be while the system was designed. The feasibility study had set 80dB (A) for outdoor, and 75dB (A) for indoor. However, the measured indoor noise is 74.4dB (A) and it is within the limit whereas the outdoor noise is 84.18dB (A) and it is beyond the range of the study. In addition to that, wear and speed have been measured at on the maximum and minimum noise rail locations to depict the relation of wear rate verses noise and speed verses noise graphically. Finally, based on the results some of the recorded noises are greater when they are compared with the standard. In order to protect the community from railway noise pollution, noise mitigation like noise dampers and planting trees around the line has to be done.
A Higgs in the Warped Bulk and LHC signals
Creators: name: Mahmoudi, F.
name: Maitra, U.
name: Manglani, N.
name: Sridhar, K.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Warped models with the Higgs in the bulk can generate light Kaluza-Klein (KK) Higgs modes consistent with the electroweak precision analysis. The first KK mode of the Higgs (h_{1}) could lie in the 1-2 TeV range in the models with a bulk custodial symmetry. We find that the h_{1} is gaugephobic and decays dominantly into a t\bar{t} pair. We also discuss the search strategy for h_{1} decaying to t\bar{t} at the Large Hadron Collider. We used substructure tools to suppress the large QCD background associated with this channel. We find that h_{1} can be probed at the LHC run-2 with an integrated luminosity of 300 fb^{-1}.
description: 18 pages, 8 figures, 1 table
Exploring the opportunities and barriers to sustainable stormwater management practices in residential catchments
Creators: name: LLoyd., Sara
Publisher: name: Monash University
Year: 2021

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Thermal fluctuations of the Josephson current in a ring of superconducting grains
Creators: name: Garanin, D. A.
name: Chudnovsky, E. M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Thermal fluctuations of the Josephson current $I$ induced by the magnetic flux through a ring of $N$ superconducting grains are studied. When a half-fluxon is threading the ring, $I$ exhibits incoherent transitions between the two degenerate states due to thermal phase slips. We propose a new numerical method to deal with both equilibrium and dynamic properties of Josephson systems. Computed transition rate has the form $Γ= A(N)\exp[-B(N)/T]$, where $B(N)$ agrees with the analytical result derived for the energy barrier associated with phase slips. In the non-degenerate case (e.g., at a quarter-fluxon) the equilibrium value of $I$ decreases with $T$ due to harmonic excitations and then gets destroyed by phase slips.
description: 6 pages, 7 figure captions
Optically enhanced production of metastable xenon
Creators: name: Hickman, G. T.
name: Franson, J. D.
name: Pittman, T. B.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Metastable states of noble gas atoms are typically produced by electrical discharge techniques or "all-optical" excitation methods. Here we combine electrical discharges with optical pumping to demonstrate "optically enhanced" production of metastable xenon (Xe*). We experimentally measure large increases in Xe* density with relatively small optical control field powers. This technique may have applications in systems where large metastable state densities are desirable.
description: 3 pages, 3 figures
ИНСТРУМЕНТЫ ЦИФРОВИЗАЦИИ В ПРОЕКТНОМ УПРАВЛЕНИИ РАЗВИТИЕМ СЕЛЬСКИХ ТЕРРИТОРИЙ
Creators: name: Сообщество рецензентов Международного научно-исследовательского журнала
Publisher: name: ИП Соколова М.В.
Year: 2022
Subjects: национальные проекты
сельские территории
SMM
муниципальное образование
проектное управление

description: Международный научно-исследовательский журнал, №8(122) (2022)
Establishing the origin of CMB B-mode polarization
Creators: name: Sheere, Connor
name: van Engelen, Alexander
name: Meerburg, P. Daniel
name: Meyers, Joel
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Primordial gravitational waves leave a characteristic imprint on the cosmic microwave background (CMB) in the form of $B$-mode polarization. Photons are also deflected by large scale gravitational waves which intervene between the source screen and our telescopes, resulting in curl-type gravitational lensing. Gravitational waves present at the epoch of reionization contribute to both effects, thereby leading to a non-vanishing cross-correlation between $B$-mode polarization and curl lensing of the CMB. Observing such a cross correlation would be very strong evidence that an observation of $B$-mode polarization was due to the presence of large scale gravitational waves, as opposed to astrophysical foregrounds or experimental systematic effects. We study the cross-correlation across a wide range of source redshifts and show that a post-SKA experiment aimed to map out the 21-cm sky between $15 \leq z \leq 30$ could rule out non-zero cross-correlation at high significance for $r \geq 0.01$.
description: 7 pages, 4 figures. Comments welcome
title: Quantifying microstructures of Earth materials: Reconstructing higher-order correlation functions using deep generative adversarial networks
Creators: name: Amiri, Hamed
name: Pires de Vasconcelos, Ivan
name: Jiao, Yang
name: Plümper, Oliver
Publisher: name: Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
Year: 2022

description:
Key to most subsurface processes is to determine how structural and topological features at small length scales, i.e., the microstructure, control the effective and macroscopic properties of earth materials. Recent progress in imaging technology has enabled us to visualise and characterise microstructures at different length scales and dimensions. An approach to characterisation is the sampling of multi-point spatial correlation functions - known as statistical microstructural descriptors (SMDs) - from images. SMDs can then be used to generate statistically equivalent structures having different scales and additional dimensions – this process is known as $reconstruction$. We use higher-order SMDs ($n$-point polytope functions) to characterise two hydrothermally altered rocks as examples of quantifying varying degrees of geometric complexity in the Earth's lithosphere. Using a generative adversarial network (GAN), trained with Wasserstein-loss and gradient penalty, we subsequently reconstruct two-dimensional electron microscopy images of these rocks. In addition to improving the training stability of GANs, we show that our model is capable of reconstructing higher-order, spatially-correlated patterns of complex earth materials, capturing underlying structural and morphological properties. Our approach is critical to address a wide range of geoscientific challenges aiming at reconstructing morphology-dependent physical rock properties to, e.g.,: i) increase the number of digital samples from limited real samples to, e.g., assess the variability of rock transport properties; ii) perform upscaling, i.e., generate representative domains from high-resolution images of small complex samples and couple microstructures to macroscopic phenomena; iii) reconstruct 3D microstructures when only 2D images are available.
Методы оценки окислительного стресса в качестве потенциальных биомаркеров при НАЖБП
Creators: name: Ефременко, Евгений
Publisher: name: ИП Соколова М.В.
Year: 2022
Subjects: печень
НАЖБП
НАСГ
биомаркеры
реактивные формы кислорода
окислительный стресс
перекисное окисление липидов.

description: Международный научно-исследовательский журнал, №8(122) (2022)
title: First Lu-Hf ages of garnet-bearing lithologies from the Saxonian Granulite Massif
Creators: name: Richter, Madeline
name: Weber, Sebastian
name: Froitzheim, Niko
name: Fassmer, Kathrin
name: Münker, Carsten
name: Ustaszewski, Kamil
Publisher: name: Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
Year: 2022

description:
The Saxonian Granulite Massif is an antiformal gneiss dome with granulite facies rocks in the core, enwrapped by uppermost amphibolite to lower greenschist facies metasediments. Their subduction and exhumation histories during the Variscan orogeny are still poorly understood. Samples of two garnet-bearing serpentinites and one eclogite from the dome-core, as well as one garnet-cordierite gneiss from the lowermost schist-cover were dated using Lu-Hf chronometry.

The granulitic core mostly consists of leucocratic granulites with scarce and laterally discontinuous slivers of mafic and ultramafic rocks. All samples were taken at the largest occurrence of ultramafics at the Rubinberg, where granofelsic eclogites (CPx, Grt, Pl, Rt) are found as two 1 m-thick, foliation parallel layers within foliated garnet-bearing serpentinites (Grt, relics of CPx, Amp, Ol, Spl). Garnet is better preserved within eclogites than in serpentinites. Within eclogites, EPMA major element zoning profiles of garnet blasts show a prograde metamorphic path, partially modified by diffusional relaxation leading to flattening of chemical zoning profiles. Complete homogenization of major elements is characteristic for all pyrope-rich, strongly kelyphitic garnets in the serpentinites. Garnet blasts within the garnet-cordierite gneiss (Pl, Grt, Sil, Bt, Crd, Qtz, Ilm, Spl) reveal complex compositional zoning profiles with a prograde metamorphic zonation pattern in the core and a secondary increase of Ca and Mn in the rims.

The eclogite yielded a Lu-Hf age of 347.5±6.7 Ma, which is interpreted to indicate the timing of peak metamorphism within the granulitic core, predating the retrograde exhumation-related fabrics. Ages of serpentinites and gneisses are still pending.
Universal Substrate Effect on the Superconductivity of FeSe Monolayer Films
Creators: name: Rebec, Slavko
name: Jia, Tao
name: Zhang, Chaofan
name: Hashimoto, Makoto
name: Lu, Donghui
name: Moore, Robert
name: Shen, Zhixun
Publisher: name: arXiv
Year: 2016
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: To elucidate the mechanisms behind the enhanced $T_c$ in monolayer (1ML) FeSe on SrTiO$_3$ (STO), we grew highly strained 1ML FeSe on the rectangular (100) face of rutile TiO$_2$, and observed the coexistence of replica bands and superconductivity with a $T_c$ of 63 K. From the similar $T_c$ between this system and 1ML FeSe on STO (001), we conclude that strain and dielectric constant are likely unimportant to the enhanced $T_c$ in these systems. A systematic comparison of 1ML FeSe on TiO$_2$ with other systems in the FeSe family shows that while charge transfer alone can enhance $T_c$, it is only with the addition of interfacial electron-phonon coupling that $T_c$ can be increased to the level seen in 1ML FeSe on STO.
description: 5 pages, 3 figures
Liquid Fuel Production Through Pyrolysis of Khat and plastic waste mixture
Creators: name: Abdulhafiz, Yishak
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2014

description: A good portion of the Ethiopian population, especially of the youth, has taken up the habit of chewing Khat (scientific name: Catha edulis Forsk). Growing use of the stimulant is obviously generating a huge amount of waste making the already-bad situation of solid waste management in Addis Ababa worse. On the other hand, the disposal of plastics is also affecting the environment negatively and in no less a degree. With the expected increase in the consumption of both items, the problem will certainly grow correspondingly especially given the trend that khat is almost always sold in plastic bags. This study investigated the potentials of khat waste to be mixed with high-density polyethylene (HDPE) for use as a raw material in pyrolysis to produce liquid fuel. The results showed that khat waste can be used in pyrolysis, solely and in a mixture with waste HDPE, to yield liquid fuel. A maximum of 26%.wt of liquid yield was achieved. Produced data on characteristics of khat waste that were not available until now showed that khat waste had 76.3% moisture (as discarded); 5.31% ash (dry basis); 59% cellulose; 31.7% lignin; 47.12% C; 6% H; 45.65% O; 1.23% N; HHV of 17.5 MJ/kg; and LHV of 12.6 MJ/kg. A dark brownish liquid that had smoky odor was produced from all runs. An average liquid yield of 15.57% was obtained while the minimum and maximum values were 3% and 26%, respectively. The experiment studied respective influences from varying amount of khat in feed; pyrolysis temperature; and total pyrolysis time. It was seen that pyrolyzing khat waste alone and in higher percentages gave better results. Lower amount of khat (30%) in the feed composition led to higher yield at 550OC. However, pyrolysis at the remaining temperatures studied (650OC and 750OC) showed corresponding increase in yield with increasing amount of khat (70% and 100%). As respective decomposition of its lignocellulosic components took place at higher temperatures (> 300OC for cellulose, and > 500OC for lignin), more amount of khat in the feed led to increased amount of liquid yield. Variation in the total pyrolysis time between 30 and 60 min did not have any significant effect. Following the similarity between elemental composition of bio-oil from pyrolysis and the parent biomass, the HHV and LHV of liquid product were calculated to be 17.1 MJ/kg and 15.05 MJ/kg, respectively. In general, the expected enhancement in liquid yield from presence of plastic was not observed. In the study, pyrolysis of khat waste alone (0% HDPE) gave the maximum percentage yield for liquid product. However, it would not be plausible to conclude that addition of plastic does not bring any benefit at all – only percentage yields but not qualities of liquid produced with and without HDPE in the feed were compared.
Risk Assessment of the Impact of Landfill on Surface Water Resources - a Case Study of the New Sendafa Landfill
Creators: name: Getachew, Hanna
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2016

description: River catchments in the vicinity of landfill site are highly vulnerable to leachate contamination and are exposed to increased risk due to storms and flooding driven by special weather conditions. The objective of this research, thus, was to better understand how the new Sendafa Landfill which is located in the Akaki River catchment might interact with extreme storm events and to investigate associated future risks. The study evaluated potential release of liquid contaminants from the Landfill and examined a broad spectrum of potential conditions that may contribute to these releases. The first step was to investigate how surface water runoff from a storm event at the Landfill contributes to the risk of contaminant release from waste sites based on the source - pathway - receptor approach. Water balance model was used to quantify leachate flow that would be released into the water resource system. Analyses were performed to evaluate the exposure of Akaki catchment to contaminant. Finally, possible mitigation measures were proposed. The result from the risk assessment confirmed that the risk associated with accidental release of leachate from the landfill would lead to contamination of surface water bodies in the vicinity. It was estimated that under 10 year, 100 year and 200 year return period 6 hours duration rainfall, maximum leachate volume of 2160.6 m3\day, 3039 m3\day and 3297.2 m3\day will be generated from the landfill respectively, out of which leachate flow of 824.6 m3/day, 1703 m3/day and 1961.2 m3/day will be above the capacity of the leachate collection system for the respective storm events. This could potentially cause transport of waste solution that may result in a severe pollution risk. Therefore it is recommended that further studies on the determination of risks and its future implications based on a wide range of climatic, environmental and socioeconomic scenarios would give a broader picture of the issues involved and to be able to address them for a better future environment. Key words: Landfill, surface water resources, risk analysis, extreme storm events, leachate, Water Balance Method
title: Calcium sulphate-rich wedges in the subsurface indicating salt dynamics in alluvial-fan deposits from the Atacama Desert
Creators: name: Zinelabedin, Aline
name: Ritter, Benedikt
name: Riedesel, Svenja
name: Mohren, Joel
name: Reimann, Tony
name: Dunai, Tibor J.
Publisher: name: Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
Year: 2022

description:
Subsurface wedges are common geomorphological structures in periglacial environments typically associated with polygonal patterned grounds on the surface. Their presence is an indicator for cryogenic processes in the subsurface resulting in vertically laminated sequences from which the wedges are formed. Similar geomorphological features occur in arid to hyperarid environments, such as in the Atacama Desert, where haloturbation processes are assumed to control subsurface-wedge formation. X-ray diffraction and x-ray fluorescence analyses of wedges from the central Atacama Desert revealed various calcium-sulphate phases accompanied by clastic minerals in the laminae sequences. Calcium-sulphate phases in the wedges are thus thought to be potential drivers for salt dynamics and wedge-growth activity. In combination with varying water availability, these salt dynamics lead to significant volumetric changes in the deposits due to phase transitions of calcium-sulphate phases, as well as dissolution and (re)precipitation of salts from infiltrating solutions. As water is scarce in the Atacama Desert, geochronological data of calcium-sulphate wedges is essential to resolve wedge-growth phases and episodes of local moisture supply, indispensable for using the wedges as palaeoclimate archives. We applied post-infrared infrared stimulated luminescence (post-IR IRSL) dating to coarse-grain feldspars extracted from a calcium-sulphate wedge outcropped on the Aroma fan in the Central Depression of the Atacama Desert. Our post-IR IRSL results from two wedge subsamples showed a widespread equivalent-dose distribution indicating multiple phases of wedge formation. Equivalent-dose distributions and palaeodoses based on the minimum age model revealed the most recent wedge-growth activities at 10.6 ± 2.2 ka and 7.9 ± 1.8 ka.
Comentário ao acórdão do tribunal de justiça da União Europeia, de 22 de setembro de 2022, XP contra Fraport AG Frankfurt Airport Services Worldwide e AR contra St. Vincenz Krankenhaus GmbH
Creators: name: Silva, Rita Canas Da
Publisher: name: Católica Law Review
Year: 2023

description: Católica Law Review, v. 7 n. 2 (2023): Direito privado
title: Significance of millennial-scale coastal upwelling and Rio Loa variability for Atacama paleoclimate during MIS 2
Creators: name: Fabritius, Jessica
name: Jaeschke, Andrea
name: Petersen, Jassin
name: Wennrich, Volker
name: Grunert, Patrick
Publisher: name: Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
Year: 2022

description:
The Atacama Desert located in northern Chile is one of the driest places on earth. The factors determining recent hyperarid climate conditions are known and their interplay and variability on interannual and decadal time scales are generally understood. Evidence for wetter (yet arid) conditions in the Atacama’s past is provided by episodic lacustrine and fluvial deposits. The main watercourse of the Atacama Desert is the Rio Loa sourced by rainfall in the Andean mountains. Information on changes of terrestrial supply to the ocean is recorded in marine sediments.

The sediment core SO-104-52KL has been collected on the upper continental slope (∼340 m water depth, 21°S) off the Rio Loa during a cruise with RV Sonne. The preliminary age model based on 14C-dating constrains the top and base of the core to 16 and 42 ka, respectively. Very high average sedimentation rates will allow paleoceaonographic and paleoclimatic studies of high resolution (millennial to centennial time scales) during the last glacial period. The location of the core on the continental slope off the Rio Loa mouth allows for the parallel evaluation of the Humboldt Current System and Andean rainfall as moisture sources for the Atacama Desert. Microfossils such as benthic foraminifera from this interval are abundant and well-preserved. Together with XRF-data, grain-size and lipid biomarker analyses, the expected proxy data will provide new insights into the dynamics of land-ocean coupling between the Atacama Desert and the eastern Pacific Ocean through characterization of coastal upwelling properties and Rio Loa runoff.
Assessment of Noise Induced from Addis Ababa Light Rail Transit Using Mathematic Quantification Method
Creators: name: Mulugeta, Mohammed
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2017

description: Railway transport system gives several advantages to the overall development of a country like increased level of passenger or cargo utilization over a limited space, safe and reliable transport with lowest accident rate and others. Although it has such advantages, increased train movements, extended rail operating hours and maintenance activities of railway system might adversely affect residents living or working near the railway route. Noise induced from the rail transport system is the most usual and major impact on peoples living or working near the railroad. The norm of noise level is affected by vehicle type, traffic speed, distance, gradient and barriers. When the level of noise gets higher, residents living in nearby noise susceptible buildings; like hospitals, clinics, schools, assembly halls might be exposed to annoyance, hearing lose, sleeplessness and damages to their material. The degree of the impact is measured by comparing the existing noise level to the standard limit. In Addis Ababa different noise susceptible buildings exist near the railway route. The assessment result shows background noise level due to roadways and local activities is higher than the noise level from rail line. The railway operation is added to the existing system does not have a significance change in the noise level induced to nearby buildings. But, the noise impact should be assessed if some improvements are made on the existing system. For instance, if a single train is added to the current train couple system, rail noise will start to have adverse impacts. Also, if headway time is increased to 6 minute, negative impacts might be resulted. When this happens suitable mitigation measures like reallocation and changing building purpose can be suggested.
Excited-State Wigner Crystals in One Dimension
Creators: name: Rogers, Fergus J. M.
name: Loos, Pierre-François
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Other Condensed Matter (cond-mat.other)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Wigner crystals (WC) are electronic phases peculiar to low-density systems, particularly in the uniform electron gas. Since its introduction in the early twentieth century, this model has remained essential to many aspects of electronic structure theory and condensed-matter physics. Although the (lowest-energy) ground-state WC (GSWC) has been thoroughly studied, the properties of excited-state WCs (ESWCs) are basically unknown. To bridge this gap, we present a well-defined procedure to obtain an entire family of ESWCs in a one-dimensional electron gas using a symmetry-broken mean-field approach. While the GSWC is a commensurate crystal (i.e.~the number of density maxima equals the number of electrons), these ESWCs are incommensurate crystals exhibiting more or less maxima. Interestingly, they are lower in energy than the (uniform) Fermi fluid state. For some of these ESWCs we have found asymmetrical band gaps, which would lead to anisotropic conductivity. These properties are associated to unusual characteristics in their electronic structure.
description: 6 pages, 6 figures
МЕТАФОРЫ КАК ИНСТРУМЕНТ МИЛИТАРИЗАЦИИ ОБЩЕСТВЕННОГО СОЗНАНИЯ В ПЕРИОД ПАНДЕМИИ COVID-19 (НА МАТЕРИАЛЕ ВЫСТУПЛЕНИЙ ПРЕМЬЕР-МИНИСТРА ВЕЛИКОБРИТАНИИ)
Creators: name: Раздуев, Алексей
Publisher: name: ИП Соколова М.В.
Year: 2022
Subjects: коронавирус
метафоричность мышления
когнитивная лингвистика
когнитивные метафоры
военные метафоры

description: Международный научно-исследовательский журнал, №8(122) (2022)
Cultivating Software Performance in Cloud Computing
Creators: name: Chen, Li
name: Cunningham, Colin
name: Jain, Pooja
name: Qin, Chenggang
name: Chow, Kingsum
Publisher: name: arXiv
Year: 2016
Subjects: subject: Performance (cs.PF)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: There exist multitudes of cloud performance metrics, including workload performance, application placement, software/hardware optimization, scalability, capacity, reliability, agility and so on. In this paper, we consider jointly optimizing the performance of the software applications in the cloud. The challenges lie in bringing a diversity of raw data into tidy data format, unifying performance data from multiple systems based on timestamps, and assessing the quality of the processed performance data. Even after verifying the quality of cloud performance data, additional challenges block optimizing cloud computing. In this paper, we identify the challenges of cloud computing from the perspectives of computing environment, data collection, performance analytics and production environment.
Evolution of active region outflows throughout an active region lifetime
Creators: name: Zangrilli, L.
name: Poletto, G.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We have shown previously that SOHO/UVCS data allow us to detect active region (AR) outflows at coronal altitudes higher than those reached by other instrumentation. These outflows are thought to be a component of the slow solar wind. Our purpose is to study the evolution of the outflows in the intermediate corona from AR 8100, from the time the AR first forms until it dissolves, after several transits at the solar limb. Data acquired by SOHO/UVCS at the time of the AR limb transits, at medium latitudes and at altitudes ranging from 1.5 to 2.3 R_sun, were used to infer the physical properties of the outflows through the AR evolution. To this end, we applied the Doppler dimming technique to UVCS spectra. These spectra include the H I Lyman alpha line and the O VI doublet lines at 1031.9 and 1037.6 A. Plasma speeds and electron densities of the outflows were inferred over several rotations of the Sun. AR outflows are present in the newly born AR and persist throughout the entire AR life. Moreover, we found two types of outflows at different latitudes, both possibly originating in the same negative polarity area of the AR. We also analyzed the behavior of the Si XII 520 A line along the UVCS slit in an attempt to reveal changes in the Si abundance when different regions are traversed. Although we found some evidence for a Si enrichment in the AR outflows, alternative interpretations are also plausible. Our results demonstrate that outflows from ARs are detectable in the intermediate corona throughout the whole AR lifetime. This confirms that outflows contribute to the slow wind.
description: 13 pages, Astronomy and Astrophysics accepted
title: Quantifying diffusion-driven metal stable isotope fractionation in olivine through powder source experiments
Creators: name: Oeser, Martin
name: Dohmen, Ralf
name: Eschenauer, Julius
name: Weyer, Stefan
Publisher: name: Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
Year: 2022

description:
Chemical and isotopic zoning in olivine has frequently been used to determine timescales of magmatic processes by diffusion modeling. Furthermore, combining the information from chemical- and Fe-Mg- or Li isotopic zoning has been shown to be a powerful tool to elucidate complex crystal growth and diffusion histories [1,2]. However, the extent of diffusion-driven Fe-Mg-Li isotope fractionation in olivine (typically termed as βFe, βMg, and βLi) and the parameters that control them, are not yet well constrained. The latter may bear a potential to better determine the boundary conditions of diffusion in order to (1) better unravel complex diffusion histories and (2) receive more precise diffusion timescales. Here, we have performed a series of diffusion experiments in which a powder source was used to produce Fe-Mg- and Li chemical and isotopic diffusion profiles in crystallographically oriented San Carlos olivine crystal cubes. Chemical and isotopic diffusion profiles were analyzed by electron microprobe (Fe-Mg concentrations), by femtosecond-laser ablation-ICP-MS (minor and trace elements), and by fs-LA-MC-ICP-MS (Fe-Mg and Li isotopic variations). We have been investigating the dependence of βFe and βMg on temperature, crystallographic orientation, and composition, and additionally the dependence of βLi on fO2. Our preliminary results indicate that the Fe-Mg isotope fractionation during diffusion parallel to the crystallographic a- and b-axes is larger than that for diffusion along the c-axis. Furthermore, Li diffusion and the associated Li isotope fractionation appear to be strongly influenced by fO2.

References:

[1] Sio & Dauphas, Geology 2017.

[2] Oeser et al., American Mineralogist 2018.
The digital tokenisation of non-financial assets: challenges to english private law
Creators: name: Pereira, Clara Martins
Publisher: name: Católica Law Review
Year: 2023

description: Digital assets are becoming a fundamental part of the modern economy, raising important debates about their nature and that of the rights that attach to them. The digital tokenisation of non-financial assets poses particular challenges for English private law: whether resulting tokens can be treated as property; whether they are “possessable”; and what is the nature of the link that connects them to the assets they represent. This article examines, in particular, whether token-owners acquire them with the expectation of changing their legal rights in the non-financial assets that underlie them, and whether the law should be amended to address these expectations. Ultimately, it is argued that the existing combination of expectations, market practice, common law and statute is currently insufficient to establish – or recommend the establishment of – a particularly strong link between digital tokens and the non-financial assets they represent. The law should go no further than allowing market participants to establish or strengthen such a link through contract, with any further protection to be provided by regulation.
description: Católica Law Review, v. 7 n. 2 (2023): Direito privado
Structures and properties of ZR-containing AL-alloys
Creators: name: Yuting., Liu
Publisher: name: Monash University
Year: 2021

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
High-Order Flux Reconstruction on Stretched and Warped Meshes
Creators: name: Trojak, W
name: Watson, R
name: Tucker, PG
Publisher: name: American Institute of Aeronautics and Astronautics
Year: 2018
Subjects: math.NA

description: High-order computational fluid dynamics is gathering a broadening interest as a future industrial tool, with one such approach being flux reconstruction (FR). However, due to the need to mesh complex geometries if FR is to displace current lower?order methods, FR will likely have to be applied to stretched and warped meshes. Therefore, it is proposed that the analytical and numerical behaviors of FR on deformed meshes for both the one-dimensional linear advection and the two-dimensional Euler equations are investigated. The analytical foundation of this work is based on a modified von Neumann analysis for linearly deformed grids, which is presented. The temporal stability limits for linear advection on such grids are also explored analytically and numerically, with Courant?Friedrichs?Lewy (CFL) limits set out for several Runge?Kutta schemes, with the primary trend being that contracting mesh regions give rise to higher CFL limits, whereas expansion leads to lower CFL limits. Lastly, the benchmarks of FR are compared to finite difference and finite volumes schemes, as are common in industry, with the comparison showing the increased wave propagating ability on warped and stretched meshes, and hence FR?s increased resilience to mesh deformation.
Black hole accretion discs and screened scalar hair
Creators: name: Davis, Anne-Christine
name: Gregory, Ruth
name: Jha, Rahul
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present a novel way to investigate scalar field profiles around black holes with an accretion disc for a range of models where the Compton wavelength of the scalar is large compared to other length scales. By analysing the problem in "Weyl" coordinates, we are able to calculate the scalar profiles for accretion discs in the static Schwarzschild, as well as rotating Kerr, black holes. We comment on observational effects.
description: 19 pages, 5 figures
title: Tracking high-grade metamorphism: from partial melting to the detrital record
Creators: name: Tedeschi, Mahyra
Publisher: name: Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
Year: 2022

description:
High to ultra-high temperature (HT-UHT) metamorphism (>800°C) drives changes in rocks that range from the production of chemical heterogeneities to the disturbing of isotopic systems. To disentangle the complex history of these rocks, a multi-prong approach is needed, due to the different sets of mineral reactions that produce melts and fluids of varying compositions at different times. Nanorock inclusions preserved in zircon are critical for retrieving primary melt compositions through re-homogenization experiments, especially in garnet-free rocks,  that can be further compared to melt compositions from different scales of observation. These observed melt compositions may then be contrasted with those predicted by thermodynamic models to evaluate the pressure-temperature evolution of partial melting. Nanorock inclusions can further assist in the deconvolution of HT-UHT rocks intricate geochronological record since these rocks often reveal a protracted zircon record with dates smeared along the concordia curve. This smearing may result from the partial resetting of existing grains or prolonged metamorphism and introduces ambiguity into U-Pb dating from igneous, sedimentary, and metamorphic rocks. The HT-UHT metamorphism has implications for maximum depositional ages and tectonic setting determinations, and its extent depends on whether metamorphism took place in the source that will be eroded and then deposited or when the rock was already deposited. A detailed investigation enables identifying protoliths and reconstructing metamorphic histories. Hf isotope analysis allows zircon sources to be distinguished, minimum crystallization ages to be retrieved, and provides additional constraints on the conditions of anatexis (e.g., open versus closed system melting; role of coexisting minerals).
Shunt Compensation for Sululta-Addis South-II Transmission-Substation System
Creators: name: Berhe, Maaregu
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2017

description: In an electrical power system, if there is no enough reactive power, the voltage decreases. Thus, it is not possible to push the power demand to loads through the lines and has a strong effect on system stability. To overcome such kind of problems, shunt compensation near or at the load area is one solution. Thus, the power system networks under this case study i.e. Sululta-Addis south-II transmission-substation which routes North West to South East of Addis Ababa uses TSC to the compensation task. The power supply during the peak hour time comes from Debre Markos to Sululta via 1x400kV transmission line, from Ghedo to Geffersa through 2x230kV transmission line and from Sebeta-II to Sebeta-I through 2x230kV transmission lines. To evaluate the voltage profile of this region, investigations has been conducted and under voltage problem at bus terminals of the substation has been found, this leads to reduction of power transfer capability of the network to the load side and to mitigate the problem, shunt compensation using FACTS device family called Thyristor Switched Capacitor (TSC) is used. To complete the entire study, necessary system parameters and data have been collected, analyzed and simulation task using DIG SILENT Power Factory software has been done for a time of peak hour of the day which is found to be at 19:00. Result of the study shows, an improvement of voltage profile at bus terminal of the substations. For example, voltage at Derba-132kV bus bar is corrected from 0.91 to 1.00 per unit (pu) which is 9.9% improvement, at Mekanissa substation 15kV bus bar from 0.93pu to 0.99 pu which is 6.5%, at Addis South-II 132kV and 15kV bus bars from 0.88 to 0.96 pu and 0.89 to 0.95 pu which is an improvement of 9.09% and 6.7% respectively. Thus, the power transfer capability increases by 27.07MW. In terms of cost benefit analysis, cost of compensation system is estimated to be 9,372,085.13 USD and a new 66kV transmission/substation which has a rating of 27MW costs 9,578,000.00USD. Thus, the compensation system can omit the constructing of new 66kV transmission/substation system and definitely cost of land compensation, project completion time and environmental crises will be reduced. So, these shall be considered for economic viability. Keywords KeywordsKeywords Keywords : Shunt compensation, thyristor switched capacitor, power transfer capability, DIG SILENT Power Factory, voltage violation
title: The mysteries of jadeite jade, a monitor of subduction-zone fluids
Creators: name: Maresch, Walter Viktor
name: Hertwig, Andreas
name: Schertl, Hans-Peter
Publisher: name: Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
Year: 2022

description:
Jadeite jade is the rare variety of jade at present known only from 20 localities of high-pressure, subduction-zone serpentinite mélange. Jadeite jade is tough, hard and brilliant when polished. It has been of special mystic meaning in Mayan and Chinese cultures for up to 8000 years. Much discussion surrounds jadeite-jade genesis: origin by direct precipitation from a high-pressure aqueous fluid? Or metasomatism of a precursor rock like trondhjemite/plagiogranite? Present evidence suggests both processes are actually closely related; densification and decrease in volume during reaction of plagiogranite to jadeite jade is a key factor. Until recently, the plagiogranite protoliths were considered to be of mid-ocean-rift origin and brought into subduction zones by cold descending oceanic crust. Jadeite jade was assumed to be mainly formed at T < 500°C. Recent work (e.g., Angiboust et al., J. Metam. Geol., 39, 473-500, 2021) indicates a surprising second source: Adakitic melting of basaltic crust at depth can produce trondhjemite intrusions that initiate the formation of jadeite jade at high temperatures as well. Since the 1950’s, jadeite is known to be a high-pressure mineral, but only in silica-saturated environments. Thus it is enigmatic why quartz is rarely found in jadeite jade (Harlow et al., Short Course Handbook, Min. Ass. Canada, 44, 305-374, 2014). Recent studies (e.g., Hertwig et al., Russ. Geol. Geoph., 62, 496–524, 2021) indicate the answer. Remnants of quartz are found as tiny, inconspicuous relict inclusions in jadeite crystals, but quartz has been removed from the rock matrix by later desilication.