cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: From portals to hubs, dashboards and storymaps - new technologies for easy access and use of geoscientific data
Creators: name:  Behrens , Lars
Publisher: name: Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
Year: 2021

description: Due to constantly changing requirements and needs for easy access and use of geoscientific data, the technology and methods to provide and present this type of data have recently evolved remarkably and will undergo more changes in the time to come. The aim is to address broader user groups in addition to the original group of experts ranging from non-experts to even the public to support decision making and participation in projects and initiatives. What used to be classical data portals providing purely access and download of data or consumption of data services will be supplemented with more ways to explore and analyze data in focused apps right away without switching to expert tools. New and tailored visualizations allow users with specific backgrounds to make better decisions and draw the right conclusions within the context needed. More and more, new data hubs and federated portals and platforms in the cloud or on premise allow collaboration between different domains. Direct connections and interfaces between these domains nurture integrated and interdisciplinary value chains. Focused apps such as dashboards and storymaps support new experiences of data. The lecture gives an overview and shows existing examples of these new offerings including the geological domain
Tidal spin down rates of homogeneous triaxial viscoelastic bodies
Creators: name: Quillen, Alice C.
name: Kueter-Young, Andrea
name: Frouard, Julien
name: Ragozzine, Darin
Publisher: name: arXiv
Year: 2016
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We use numerical simulations to measure the sensitivity of the tidal spin down rate of a homogeneous triaxial ellipsoid to its axis ratios by comparing the drift rate in orbital semi-major axis to that of a spherical body with the same mass, volume and simulated rheology. We use a mass-spring model approximating a viscoelastic body spinning around its shortest body axis, with spin aligned with orbital spin axis, and in circular orbit about a point mass. The torque or drift rate can be estimated from that predicted for a sphere with equivalent volume if multiplied by $0.5 (1 + b^4/a^4)(b/a)^{-4/3} (c/a)^{-α_c}$ where $b/a$ and $c/a$ are the body axis ratios and index $α_c \approx 1.05$ is consistent with the random lattice mass spring model simulations but $α_c = 4/3$ suggested by scaling estimates. A homogeneous body with axis ratios 0.5 and and 0.8, like Haumea, has orbital semi-major axis drift rate about twice as fast as a spherical body with the same mass, volume and material properties. A simulation approximating a mostly rocky body but with 20\% of its mass as ice concentrated at its ends has a drift rate 10 times faster than the equivalent homogeneous rocky sphere. However, this increase in drift rate is not enough to allow Haumea's satellite, Hi'iaka, to have tidally drifted away from Haumea to its current orbital semi-major axis.
description: accepted for publication in MNRAS
title: Gabbro glacier or sheeted sills? How the lower crust of fast-spreading oceanic ridges is accreted
Creators: name: Koepke, Jürgen
name: Garbe-Schönberg, Dieter
name: Mock, Dominik
name: Müller, Samuel
Publisher: name: Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
Year: 2022

description:
Based on a newly established profile through the fast-spreading oceanic crust of the Oman ophiolite and on cores drilled within the ICDP Oman Drilling Project (OmanDP), we present here the results of 10 years research, focusing on the nature of the magmatic accretion of the deep crust beneath fast-spreading mid-ocean ridges. We established a 5 km long profile through the whole crust of the Oman ophiolite by systematic outcrop sampling in the Wadi Gideah (Wadi Tayin Block near Ibra), providing the reference frame for the two 400 m long crustal OmanDP drill cores GT1 and GT2, drilled into the same Wadi.

The results allow implication on the mechanism of accretion of fast-spreading lower oceanic crust. Depth profiles on bulk rock and mineral compositions, crystallization temperature and microstructures combined with petrological modeling reveal insights into the mode of magmatic formation of fast-spreading lower oceanic crust, implying a hybrid accretion mechanism. The lower 2/3 of the crust (mainly layered gabbros) formed via the injection of melt sills and in situ crystallization. Here, upward moving fractionated melts mixed with more primitive melts through melt replenishments, resulting in an upward differentiation trend. Since the fraction of crystallization is only small, upmoving melts could easily transport the latent heat produced by deep crystallization upward. The upper third of the gabbroic crust is significantly more differentiated, in accord with a model of downward differentiation of a parental melt originated from the axial melt lens located at the top of the gabbroic crust.
title: High resolution LA-ICP-MS mapping for the determination of partition coefficients using the example of natural barite
Creators: name: Kirchner, Ferdinand
name: Kutzschbach, Martin
name: Neumann, Thomas
name: Drake, Henrik
Publisher: name: Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
Year: 2022

description:
In deep geological repository systems, containers for highly radioactive waste may encounter groundwater, which ultimately leads to the release of radionuclides. For the exploration of new atomic waste repositories, the retention of these radionuclides in hydrothermally grown barite and calcite has drawn much attention recently. Here, partition coefficients are important parameters as they are helpful to evaluate the immobilization potential. To derive meaningful partition coefficients, only parts of the crystals in equilibrium with their host fluid should be considered. Differences in partition coefficients between synthetic and natural calcite have been observed and might at least partially stem from such analytical complications. This study presents a method which combines both, the advantages of visualizing growth structures at the µm scale and element sensitivity down to the ppm level via LA-ICP-MS. Objects of investigation are natural barites from a borehole in the Äspö Hard Rock Laboratory, Sweden, that have been sampled together with their host fluid. High-resolution mappings with a spot size of 2 µm allow us to define discrete growth zones and calculate equilibrium partition coefficients based on pixel clusters that represent the latest crystallization events. Additional LA-ICP-MS spot analyses substantiate the lower error values of our method and provide partition coefficients for twelve elements. La and Sr are assumed to behave like radionuclides, due to similar chemical properties. Preliminary barite partition coefficients for La and Sr are 3-4 orders of magnitude below calcite values of the same sampling location, indicating a much lower immobilization potential of barite compared to calcite.
title: Duckweeds as quasi-hyperaccumulators of rare earths and the biounavailability of Gd-based contrast agents
Creators: name: Zocher, Anna-Lena
name: Klimpel, Franziska
name: Kraemer, Dennis
name: Bau, Michael
Publisher: name: Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
Year: 2022

description:
Duckweeds are widespread macrophytes in lentic waters. These small, fast-growing aquatic plants receive increasing attention as potential food supplement, which makes detailed knowledge of their chemical composition highly important.

The rare earths and yttrium (REY) are pivotal of many enabling technologies causing a constantly growing release of REY into the environment. However, little is known about their transfer from the geosphere into the biosphere. As duckweeds retrieve their elements primarily from ambient water, they are excellent objects for related studies.

We present data for all REY (and some other elements) in naturally grown duckweeds and ambient waters in their habitat. Some of the waters show shale-normalised (SN) REY patterns with pronounced positive Gd anomalies which originate from Gd-based contrast agents (Gd-CAs) applied in magnetic resonance imaging.

Rare earths and yttrium concentrations in the duckweeds strongly exceed those in ambient water and correlate closely with Mn (but not Ca), possibly indicating a common uptake mechanism. The REYSN patterns of the duckweeds are fractionated relative to both shale and ambient water, with larger distribution coefficients for light compared to heavy REY, probably due to stronger complexation of heavy REY with dissolved ligands. None of the duckweeds displays any anthropogenic GdSN anomaly, regardless of its presence or absence in ambient water.

Our findings show that duckweeds have a strong bioaccumulation potential and are quasi-hyperaccumulators of REY and further corroborate the conservative behaviour of Gd-CAs in the environment.
title: Dissecting a granulite-facies migmatite: Leucosome – melanosome – bulk rock relationships and the role of garnet (Namaqua Metamorphic Province, South Africa)
Creators: name: Reinhardt, Jürgen
name: Leetz, Aidan
name: Bailie, Russell
Publisher: name: Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
Year: 2022

description:
A geochemical-mineralogical study carried out on a migmatite from the granulite zone of the Bushmanland Domain in the Grenville-cycle Namaqua-Natal Belt in southern Africa reveals an anatectic process largely controlled by biotite dehydration melting that resulted in leucosome compositions which are less siliceous and which have a higher maficity compared to the melanosomes. The rocks show an unusual internal S-L structure with a dominantly linear, parallel arrangement of isolated leucosome patches within a melanosome matrix. Although the leucosome proportion is high (between 40 and 60 vol%), there is very little local interconnectivity between adjacent leucosome patches, with no clear evidence for either larger-scale melt accumulation, or for melt escape channels along or across the rocks’ structural anisotropy. Geochemical evidence indeed points to anatexis without significant melt loss, whereby the resultant leucosome and melanosome segregations combine in the bulk rock to a composition that corresponds to a pre-anatectic metapelitic protolith. The leucosomes show no evidence for the involvement of externally-derived melts.

Garnet plays a critical role for the major and trace element distribution between leucosome and melanosome, as it is concentrated in the former, lowering the Si content relative to the bulk rock and increasing FeO, MnO, Sc and HREE. The high concentration of peritectic garnet within the newly formed melt would also have increased its density markedly. In conjunction with the particular (constrictional deformation-related) distribution of unconnected leucosomes in these migmatites, this may well have impeded effective melt loss from the source rock, despite the high melt proportion.
title: Connection of sulfide species and sedimentary trace metal cycles in the Namibian shelf – implications for paleo-marine redox proxies
Creators: name: Eroglu, Sümeyya
name: Kurzweil, Florian
name: Scholz, Florian
name: Dellwig, Olaf
name: Strauss, Harald
Publisher: name: Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
Year: 2022

description:
The identification of redox-states and -cycling in the paleo-ocean is typically based on the application of geochemical proxies in the geological record. In particular total organic carbon (TOC) and total sulfur (TS) contents, trace metal (TM) enrichments, elemental ratios (e.g. TM/Al, Fe/Al) and stable isotope compositions (e.g. of sulfur and molybdenum) in siliciclastic sedimentary rocks are used to distinguish between anoxic-ferruginous and -sulfidic conditions of the past [e.g. 1]. For the understanding of depositional and diagenetic mechanisms that may affect these proxy signatures, their detailed calibration in modern marine environments is, however, required. Notably, the connection of TM accumulation, TOC content and sulfide production is still not fully understood. In this context, open-marine shelf sediments connected to upwelling regimes are of high importance given that high organic carbon burial fuels sulfate reduction and the accumulation of TMs in the sediment.

Here we investigate sediment cores from different redox-regimes along the Namibian shelf, which are controlled by the Benguela upwelling system. Sediments were deposited under anoxic-sulfidic to oxic conditions and show a correlation of TOC (average: 3.57 to 8.93 wt-%) and TS concentrations (average: 1.02 to 1.42 wt-%). In contrast, TM enrichments are mainly uncorrelated with TOC and TS contents. Indeed, the extraction of different sulfide species and their sulfur isotopic compositions reveal variabilities in the sulfur cycling between the investigated settings and an influence on the accumulation of TMs. We discuss the importance of different sulfur species on TM redox-proxies.

[1] Calvert and Pedersen (1993) Marine Geology 113, 67-88.
Study of Duckweed-Based Pond System for the Treatment of Domestic Wastewater
Creators: name: Fanta, Zekaryas
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2016

description: Existing wastewater treatment technologies such as activated sludge and tertiary nutrient removal systems are too costly to provide a satisfactory solution for the increasing wastewater problems in developing regions. Besides, these technologies do not allow for re-use of valuable nutrients contained in wastewater. In the present study, an aquatic plant duckweed (Lemna minor) was investigated as an alternative cost effective biological tool for the treatment of domestic wastewater to remove concentrations of organic matter, nutrients and pathogens. Duckweed plants were inoculated into semi-batch experimental ponds to treat pretreated and untreated sewage water. The experiments were conducted under outdoor environmental conditions for a period of 21 days. Composite samples were collected under the duckweed mat every seven days. Efficiencies of duckweed for the treatment of domestic wastewater were assessed by measuring some of the physico-chemical parameters and faecal coliforms in the treated wastewater. The observations revealed mean reduction levels of 86.28% BOD5, 82.26% COD, 90.18% TSS, 66.07% NH4 +, 65.26% TKN, 68.84% PO4 3-, 70.58% TP, 97.67% FC for duckweed ponds with untreated sewage and 88.14% BOD5, 86.56% COD, 91.6% TSS, 85.84% NH4 +, 68.20% TKN, 81.01% PO4 3-, 74.21% TP, 98.95% faecal coliforms for duckweed ponds with pretreated sewage. Compared with the Provisional National Environmental Quality Standard, all parameters values of the duckweed effluents except faecal coliforms bacteria were within the standard limit values set by EEPA. However, faecal coliform values fulfilled WHO guideline set to ensure safe reuse of the effluents. The results showed that duckweed can be successfully used for treatment of domestic wastewater. Keywords: Duckweed, Lemna minor, Wastewater, Nutrient
Electric-field Induced Reversible Switching of the Magnetic Easy-axis in Co/BiFeO3/SrRuO3/SrTiO3 Heterostructures
Creators: name: Gao, T. R.
name: Zhang, X. H.
name: Ratcliff, W.
name: Maruyama, S.
name: Murakami, M.
name: Anbusathaiah, V.
name: Yamani, Z.
name: Chen, P. J.
name: Shull, R.
name: Ramesh, R.
name: Takeuchi, I.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Electric-field (E-field) control of magnetism enabled by multiferroics has the potential to revolutionize the landscape of present memory devices plagued with high energy dissipation. To date, this E-field controlled multiferroic scheme at room temperature has only been demonstrated using BiFeO3 (BFO) films grown on DyScO3 (refs 1 and 2), a unique and expensive substrate, which gives rise to a particular ferroelectric domain pattern in BFO. Here, we demonstrate reversible E-field-induced switching of the magnetic state of the Co layer in Co/BFO (001) thin film heterostructures fabricated on SrTiO3 substrates. The angular dependence of the coercivity and the remanent magnetization of the Co layer indicates that its easy axis reversibly switches by 45° back and forth between the (100) and the (110) crystallographic directions of SrTiO3 as a result of alternating application of positive and negative voltage pulses on BFO. The coercivity of the Co layer exhibits a hysteretic behavior between two states as a function of voltage. To explain the observation, we have also measured the exact canting angle of the antiferromagnetic G-type domain in BFO films for the first time using neutron diffraction. These results suggest a pathway to integrating BFO-based devices on Si wafers for implementing low power consumption and non-volatile magnetoelectronic devices.
title: Interim report about geological survey in the Monticiano-Roccastrada metamorphic core complex (MRMCC, S-Tuscany, Italy) with considerations about its stratigraphic and tectonic development
Creators: name: Engelbrecht, Hubert
Publisher: name: Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
Year: 2022

description:
The study area is part of the Mid Tuscan Ridge: a linear belt of metamorphic core complexes, exhumed during M-L-Tertiary times. They separate the N-Apenninic main belt from the Tuscan metamorphic zone, which originated during the opening of the N-Tyrrhenian back arc basin. This resulted from postcollisional rollback of the steeply W-dipping Adriatic subduction zone: effecting the migration of eastbound, paired compressional-extensional deformation fronts and of magmatism in the overlying crust (literature data).

The central part of the MRMCC (Farma Valley) was chosen for revision of geological field work. The already accomplished map part including resulting stratigraphic and tectonic facts are displayed:

Results: Above a fragmented and extended uniform base - Devonian pelagites - different Carboniferous, coeval, predominantly siliciclastic depositional areas developed as highstand systems tract above a downlap surface. Their recent proximality trend is westbound and their sedimentary environments, separated by normal faults, represent the shelf, lower slope, base of slope and basin margin. Sediment input was triggered by tropical storms and/or seaquakes. The deposits of these environments are covered by regressive, littoral-deltaic siliciclastics (Permian).

During E-M-Tertiary subduction related tectonic burial, the Carboniferous normal faults were reactivated, so that mentioned slope and basin deposits were thrusted onto inner shelf deposits. M-L-Tertiary unroofing caused exhumation from ca. 25 km depth. A megabreccia got exposed. It is arranged in subzones, characterised by distinctive metamorphism and deformation.

Farma Valley is probably geomorphological expression of an exhumed tear fault, part of the fracture system controlling the eastward migration of the Tuscan Magmatic Province.
Crosslinked EPDM rubbers with different nanofillers
Creators: name: Mohammad., Abubaker
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.
Charge carrier transport and lifetimes in n-type and p-type phosphorene as 2D device active materials: an ab initio study
Creators: name: Tea, Eric
name: Hin, Celine
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In this work, we provide a detailed analysis of phosphorene performance as n-type and p-type active materials. The study is based on first principles calculation of phosphorene electronic structure, and resulting electron and hole scattering rates and lifetimes. Emphasis is put on extreme regimes commonly found in semiconductor devices, i.e. high electric fields and heavy doping, where impact ionization and Auger recombination can occur. We found that electron-initiated impact ionization is weaker than the hole-initiated process, when compared to carrier-phonon interaction rates, suggesting resilience to impact ionization initiated breakdown. Moreover, calculated minority electron lifetimes are limited by radiative recombination only, not by Auger processes, suggesting that phosphorene could achieve good quantum efficiencies in optoelectronic devices. The provided scattering rates and lifetimes are critical input data for the modeling and understanding of phosphorene-based device physics.
Sensing the Cultural Significance with AI for Social Inclusion
Creators: name: Bai, Nan
Publisher: name: A+BE | Architecture and the Built Environment
Year: 2023

description: Social Inclusion has been growing as a goal in heritage management. Whereas the 2011 UNESCO Recommendation on the Historic Urban Landscape (HUL) called for tools of knowledge documentation, social media already functions as a platform for online communities to actively involve themselves in heritage-related discussions. Such discussions happen both in “baseline scenarios” when people calmly share their experiences about the cities they live in or travel to, and in “activated scenarios” when radical events trigger their emotions. To organize, process, and analyse the massive unstructured multi-modal (mainly images and texts) user-generated data from social media efficiently and systematically, Artificial Intelligence (AI) is shown to be indispensable. This thesis explores the use of AI in a methodological framework to include the contribution of a larger and more diverse group of participants with user-generated data. It is an interdisciplinary study integrating methods and knowledge from heritage studies, computer science, social sciences, network science, and spatial analysis. AI models were applied, nurtured, and tested, helping to analyse the massive information content to derive the knowledge of cultural significance perceived by online communities. The framework was tested in case study cities including Venice, Paris, Suzhou, Amsterdam, and Rome for the baseline and/or activated scenarios. The AI-based methodological framework proposed in this thesis is shown to be able to collect information in cities and map the knowledge of the communities about cultural significance, fulfilling the expectation and requirement of HUL, useful and informative for future socially inclusive heritage management processes.
description: A+BE | Architecture and the Built Environment, No. 17 (2023): Sensing the Cultural Significance with AI for Social Inclusion
Effect of Warehousing Practices on Organizational Performance: A Case Study of My Wish Enterprise P.L.C.
Creators: name: Hailu, Kibrom
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2019

description: Warehouses are used for receiving, storing, order picking and shipping goods. Warehousing refers to the activities involving storage of goods on a large-scale in a systematic and orderly manner and making them available conveniently when needed. Organizational performance is normally looked at in-terms of productivity, quality, customer satisfaction, and time outcomes. This research examined the effect of warehousing on organizational performance through a case study of My Wish Enterprise Plc. To achieve the objectives of this study an explanatory research design was used. Data was collected through a questionnaire survey from a total of 60 employees. The results of this study indicate that warehousing dimensions such as (receiving activity, storage activity, picking activity, shipping activity and order picking) have positive and significant relationship with organizational performance. The findings of the study indicate also that employees were well aware of the importance of warehousing activities on organizational performance. The results also indicate that, unlike order picking, the four warehousing dimensions (receiving activity, storing activity, picking activity, shipping activity) have a relatively more positive and significant effect on organizational performance. These dimensions contribute significantly (47.6%) to organizational performance. Based on the findings of the study, several recommendations are made, including that order picking should be given higher priority so as to improve organizational performance, but also since this activity is at the closest interface with the customer - customer satisfaction is at risk. Finally, based on the gap observed, it would be to the benefit of My Wish Enterprise to streamline its warehousing operations through a formalization of its warehousing guidelines, to improve the knowledge capacity of staff with regards to warehousing operations, to improve the security measures i.e. with CCTV systems, and, in view of its expansive stock, to explore the possibility of digitalizing warehousing operations.
Background constraints in the infinite tension limit of the heterotic string
Creators: name: Azevedo, Thales
name: Jusinskas, Renann Lipinski
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this work we investigate the classical constraints imposed on the supergravity and super Yang-Mills backgrounds in the $α'\to 0$ limit of the heterotic string using the pure spinor formalism. Guided by the recently observed sectorization of the model, we show that all the ten-dimensional constraints are elegantly obtained from the single condition of nilpotency of the BRST charge.
description: 23 pages, including appendices. Typos fixed, minor improvements. Published version
title: Experimental and isotopic insights into mineral-fluid interactions at Earth’s surface in natural and engineered systems
Creators: name: Harrison, Anna L.
name: Mavromatis, Vasileios
name: Schott, Jacques
name: Wood, Cameron
name: Patel, Avni
name: Oelkers, Eric
name: Maher, Katharine
name: Wilson, Siobhan A.
name: Raudsepp, Maija
name: Golla, Jon
Publisher: name: Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
Year: 2022

description:
Mineral-fluid interactions underpin element cycles, mobility of hazardous and valuable metals, and removal of CO2 from the atmosphere. The fractionation of isotopes provides insights into the processes controlling mineral-fluid reactions in both natural and human-influenced environments. Similarly, the isotopic compositions of minerals reflect the environmental conditions, such as temperature and fluid composition, at the time of mineral formation. Interpreting environmental conditions of the Earth’s past and designing strategies for remediation of pollutants and greenhouse gases requires an understanding of the mechanisms of mineral-fluid interaction. We use experimental approaches and analysis of stable isotopes (Mg, C, O, Ca, Si) to investigate processes controlling mineral-fluid interactions and the isotopic composition of minerals at Earth’s surface conditions, with a focus on the weathering reactions that remove CO2 from the atmosphere. Our experiments demonstrate that element exchange between carbonate minerals and fluids continues at bulk mineral-fluid equilibrium potentially resulting in alteration of isotopic signatures and immobilization/remobilization of metals. Similarly, isotope fractionation during non-stoichiometric wollastonite [CaSiO3] dissolution suggests mass exchanged is not unidirectional even far from chemical equilibrium. On the other hand, mineral dissolution-precipitation reactions are revealed to be dependent on water activity, controlled by relative humidity, with reactions effectively arrested below a threshold relative humidity. Together, our research explores the processes controlling mineral-fluid interactions at the mineral-surface scale, with implications for the global scale element cycles operating over geologic timescales.
Doubly heavy baryon spectra guided by lattice QCD
Creators: name: Garcilazo, H.
name: Valcarce, A.
name: Vijande, J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: This paper provides results for the ground state and excited spectra of three-flavored doubly heavy baryons, $bcn$ and $bcs$. We take advantage of the spin-independent interaction recently obtained to reconcile the lattice SU(3) QCD static potential and the results of nonperturbative lattice QCD for the triply heavy baryon spectra. We show that the spin-dependent potential might be constrained on the basis of nonperturbative lattice QCD results for the spin splittings of three-flavored doubly heavy baryons. Our results may also represent a challenge for future lattice QCD work, because a smaller lattice error could help in distinguishing between different prescriptions for the spin-dependent part of the interaction. Thus, by comparing with the reported baryon spectra obtained with parameters estimated from lattice QCD, one can challenge the precision of lattice calculations. The present work supports a coherent description of singly, doubly and triply heavy baryons with the same Cornell-like interacting potential. The possible experimental measurement of these states at LHCb is an incentive for this study.
description: 17 pages, 3 figures. To be published in Phys. Rev. D. Two references have been added
title: High-precision Cd isotope analysis of soil and rock by double spike MC-ICP-MS
Creators: name: Liu, Mengshu
name: Yu, Hui-Min
Publisher: name: Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
Year: 2022

description:
Cadmium (Cd) is a trace element on Earth and causes health problems to humans. A monitoring of the Cd level of, for example, arable soil is therefore of utmost importance. Even though Cd isotopes are a valuable proxy for such a monitoring, the low concentration of Cd in soil and rock challenged its determination hitherto. Thus, here we developed a novel high-precision Cd isotope measurement method for soil and rock samples. First, we developed a one-step anion chromatography method using micro-columns. Second, we developed a MC-ICP-MS method using double spike approach to correct for instrumental mass-dependent isotope fractionation. Parameters affecting the precision and accuracy of the Cd isotope composition (δ114/110Cd) were systematically tested. These tests included molarity and concentration mismatches between purified samples and the bracketing standard NIST SRM 3108, and the variation in double spike and sample ratio. We also evaluated potential mass biases caused by molecular and isobaric interferences. The long-term external precision for δ114/110Cd is better than ± 0.05‰ (2 SD). Cd isotope compositions of fifteen international reference materials were determined, including soils and igneous rocks of different Cd concentrations and a manganese nodule. The δ114/110Cd values of the reference materials ranged from -0.25 ~ 0.63‰ for soil samples, and from -0.20 to 0.10‰ for rock samples. The large variations in δ114/110Cd in soils and igneous rocks suggest the application of Cd isotopes to gain more detailed insights into magmatic processes and the biogeochemical cycle of Cd in terrestrial ecosystems.
The damage resistance and tolerance of composite structures : a study of impactor properties and preload effects
Creators: name: Mitrevski., Tom
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.
Analysis of Third Rail Technology for 750 V DC Power Feeder Light Railway Transportation: Case Study of AALRT
Creators: name: Solomon, Gossa
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2016

description: This thesis analyzes two different transportation electrification DC traction power feeder structures, i.e., an embedded wireless power transfer system and an overhead catenary wire system. The efficiency, feasibility, and benefits of the two systems are considered. Addis Ababa LRT was started OCS, but they have problems like: bad environmental visualization, wind effect on catenary, wind effect on the catenary cable and alignment problem of Track with respect to Catenary cable .Those problems are solved based on third rail DC traction power feeder relatively run at safely, durable, harmonic effect reduce and environmental attractiveness. The method of solved the problems based on data analyzed and design of third rail power sequence. This situation needs an effective alternative traction power feeder for train control and protection system power sequence apply and working safely. A rail track switching system has been designed to control railway track controlling devices including railway switches and signals within a given area from a single point. Such control is exercised through the use of various track circuits which detect the presence of trains on a particular segment track and monitor the train's safety. Normal modeling approaches for power electronics and train usage were developed in MATLAB/Simulink to compare the two systems, each at two power levels 0 VDC and 750 VDC were chosen to demonstrate the differences between power levels depend on the relay energized or not in the power box controller. Component efficiencies, energy transfer levels, from power cable to contact rails for the various models were determined. The process has not been completed but key results from the analysis and lessons learned from this process will be discussed in this Thesis.
Regularity for a fractional p-Laplace equation
Creators: name: Schikorra, Armin
name: Shieh, Tien-Tsan
name: Spector, Daniel
Publisher: name: arXiv
Year: 2016
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: In this note we consider regularity theory for a fractional $p$-Laplace operator which arises in the complex interpolation of the Sobolev spaces, the $H^{s,p}$-Laplacian. We obtain the natural analogue to the classical $p$-Laplacian situation, namely $C^{s+α}_{loc}$-regularity for the homogeneous equation.
title: Modeling of Fe-bearing mineral surfaces towards understanding the reactivity of chemically modified nanozerovalent iron particles
Creators: name: Tunega, Daniel
name: Brumovský, Miroslav
Publisher: name: Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
Year: 2022

description:
Chlorinated hydrocarbons (CHCs) such as PCE (perchloroethylene), TCE (trichloroethylene), and DCE (dichloroethylene) represent a serious contamination problem for water resources. Therefore, there is an urgent need to develop new effective in situ remediation technologies for removing CHCs from soil and groundwater.

In the past, laboratory and field studies showed nanoscale zerovalent iron (nZVI) particles as suitable material for removing CHCs. However, the application of this technology is still limited due to rapid particle corrosion and short longevity. There is an intensive effort to suppress nZVI corrosion and increase its longevity without negative effects on particle reactivity. Chemical modification such as sulfidation and recently also nitriding has been recognized as promising treatments to increase the particle longevity. Studies showed that FeSx and FexN mineral phases are formed during the chemical modification.

To further optimize chemical modification of nZVI, it is important to understand processes at surfaces at molecular scale. We built models of typical crystal surfaces of FeSx and FexN minerals detected in modified nanoparticles. They were used in modeling of interactions of CHCs molecules with these surfaces by using density functional theory method. In calculations, solvent effect was also included by using polarizable continuum model. Further, reaction paths of TCE dechlorination was explored by performing transition state calculations and molecular dynamics. We showed that the cleavage of the first C–Cl bond was the rate-limiting step for the dechlorination of CHCs at the γ′–Fe4N(001) surface, with the reaction barriers of 27.0, 29.9, and 40.8 kJ mol–1 for TCE, PCE, and cis‑DCE, respectively.
title: Isotopic fractionation during planetary-scale processes
Creators: name: Hin, Remco C
Publisher: name: Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
Year: 2022

description:
Mass-dependent fractionation of isotopes has rapidly grown as a tool to study a large variety of geological/-chemical processes since the advent of mass spectrometry. Traditionally, the isotopes of relatively low mass elements such as hydrogen, oxygen and carbon were used to study dominantly low-temperature processes. Improvements in measurement precision have, however, enabled us to resolve fractionation occurring in the isotopes of nearly all elements in the periodic table during low- or high-temperature processes.

Isotopic fractionation can take place under two extreme conditions. Unidirectional, or kinetic, fractionation is typically relatively large and roughly proportional to the square-root of the mass ratio of the isotopes. Under chemical equilibrium, fractionation is typically smaller and decreases with the square of temperature as differences in zero-point vibrational energies control the isotopic fractionation between phases. These two scenarios are just one of the complexities that need to be unravelled when analysing isotopic fractionation, particularly when isotopic variations are small, as is often the case for relatively high-mass elements and when attempting to study high-temperature processes.

I will present a case where careful sample selection and analysis combined with theoretically or experimentally constrained isotopic fractionation factors and multiple chemical proxies allow isotopic fractionation to be a valuable tool to understand large-scale, planetary formation/differentiation processes.
Optimization and Characterization of Biodiesel Production from Leather Industry Fleshing Wastes
Creators: name: Dagne, Henok
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2015

description: Leather industry fleshing wastes have been currently recognized as potential feed stocks for biodiesel production due to high fat content and less competition with food production. Moreover, utilization of industrial wastes for energy production has additional environmental protection purposes. This research work aims at optimization of process variables of biodiesel production from limed leather fleshing waste. Wet limed leather fleshing wastes were delimed using 1% boric acid, dried, chopped and subjected to Soxhlet extraction. The oil after concentrated was treated by 2% w/w orthophosphoric acid and 3% w/w distilled water to remove gums. The pretreated oil had acid value of 1.13 mg KOH /g of oil, FFA of 0.56 %. Since the FFA was below 2.5% direct homogenous base catalyzed transesterification was conducted. The conversion to biodiesel by potassium hydroxide-catalyzed transesterification was achieved above 96% under optimum conditions: a methanol-to-oil molar ratio of 6:1, catalyst amount of 1 % w/w, reaction temperature of 60 °C for an hour reaction time. The produced FAME was found to have viscosity of 5.99 mm2/s density of 880 kg/m3 , cetane number of 68.5, iodine value of 65.13g I2 /100g and HHV of 42.38 MJ/kg. The results showed that majority of the fuel properties are within the ASTM and EN standards. Keywords: Biodiesel, fleshing oil, homogenous catalysis, pretreatment, transesterification
Searching for supergiant fast X-ray transients with Swift
Creators: name: Romano, P.
name: Bozzo, E.
name: Esposito, P.
name: Sbarufatti, B.
name: Haberl, F.
name: Ponti, G.
name: D'Avanzo, P.
name: Ducci, L.
name: Segreto, A.
name: Jin, C.
name: Masetti, N.
name: Del Santo, M.
name: Campana, S.
name: Mangano, V.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Supergiant fast X-ray transients (SFXTs) are high mass X-ray binaries (HMXBs) hosting a neutron star and an OB supergiant companion. We examine the available Swift data, as well as other new or archival/serendipitous data, on three sources: IGR J17407-2808, 2XMM J185114.3-000004, and IGR J18175-2419, whose X-ray characteristics qualify them as candidate SFXT, in order to explore their properties and test whether they are consistent with an SFXT nature. As IGR J17407-2808 and 2XMM J185114.3-000004 triggered the Burst Alert Telescope on board Swift, the Swift data allow us to provide their first arcsecond localisations, leading to an unequivocal identification of the source CXOU J174042.0-280724 as the soft X-ray counterpart of IGR J17407-2808, as well as their first broadband spectra, which can be fit with models generally describing accreting neutron stars in HMXBs. While still lacking optical spectroscopy to assess the spectral type of the companion, we propose 2XMM J185114.3-000004 as a very strong SFXT candidate. The nature of IGR J17407-2808 remains, instead, more uncertain. Its broad band properties cannot exclude that the emission originates from either a HMXB (and in that case, a SFXT) or, more likely, a low mass X-ray binary. Finally, based on the deep non-detection in our XRT monitoring campaign and a careful reanalysis of the original Integral data in which the discovery of the source was first reported, we show that IGR J18175-2419 is likely a spurious detection.
description: Accepted for publication in Astronomy and Astrophysics. 12 pages, 11 figures, 6 tables
Interview with Lin Fraser
Creators: name: :Unav
Publisher: name: University of Victoria Libraries
Year: 2021
Subjects: Fraser, Lin
Attachment
Healthcare
Trauma
Ally
Standards of Care
Lou Sullivan
Counselling
Clinical
WPATH
Activism
Witnessing
Paul Walker
HBIGDA

description: Lin talks about her work with trans people from the early days, including the first drafts of the standards of care, and her clinical observations over many years working with the trans community. Narrator Name: Lin Fraser. Interviewer Name: Evan Taylor. Pronouns: She.
Kinetics of the initial stage of kraft pulping of Eucalyptus globulus
Creators: name: Mirams., Stephen James
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.
title: Millennial-timescale climate change over the last 800 kyrs evidenced by magnetic, colorimetric and ATR-FTIR data from the Suhia Kladenetz quarry loess-paleosol sequence (Pleven, Bulgaria)
Creators: name: Laag, Christian
name: Lagroix, France
name: Guyodo, Yohan
name: Jordanova, Diana
name: Jordanova, Neli
name: Ishlyamski, Daniel
name: Georgieva, Bozhurka
name: Saulnier-Copard, Ségolène
name: Chapkanski, Stoil
name: Moine, Olivier
name: Antoine, Pierre
Publisher: name: Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
Year: 2022

description:
Eastern European loess-paleosol sequences (LPS) are excellent archives of past climate change. Millennial-timescale climate change is successfully evidenced in loess of the last and penultimate glacial periods. However, study designs with similar or lower sampling resolution strategies and/or single proxy investigations do not favor their identification for earlier glacials, which are generally scarcer, thinner and characterized by lower sedimentation rates. The high-sampling resolution multi-proxy study presented here demonstrates the first evidence of millennial-timescale climate change for periods older than MIS6 archived in an Eastern European LPS.

The Suhia Kladenetz 27 m long profile was sampled continuously at a 2 cm resolution for bulk sediment. Magnetic and colorimetric measurements are performed on all samples. ATR-FTIR data is acquired at the same resolution through loess units and at a 12 cm interval elsewhere, while grain size analyses are conducted continuously at a 12 cm interval. Rock magnetic data and microscopic observations, from our previous work, characterized a 20-cm-thick outcropping tephra in the MIS6 loess unit and identified several cryptotephras. Moreover, a correlative age model demonstrating that the LPS covers the last ~800 kyrs allowed to provide age estimates for the tephra and cryptotephras and thereafter to deduce their likely volcanic sources.

The integrated age model in combination with high-resolution colorimetry-based estimates of goethite and hematite concentrations, and clay mineralogy highlight a cyclicity undoubtedly driven by climate change within interstadials/stadials as shown by correlations with the NGRIP δ18O ice core records for the last glacial/interglacial cycle.
Multiscale Model Approach for Magnetization Dynamics Simulations
Creators: name: De Lucia, Andrea
name: Krüger, Benjamin
name: Tretiakov, Oleg A.
name: Kläui, Mathias
Publisher: name: arXiv
Year: 2016
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Simulations of magnetization dynamics in a multiscale environment enable rapid evaluation of the Landau-Lifshitz-Gilbert equation in a mesoscopic sample with nanoscopic accuracy in areas where such accuracy is required. We have developed a multiscale magnetization dynamics simulation approach that can be applied to large systems with spin structures that vary locally on small length scales. To implement this, the conventional micromagnetic simulation framework has been expanded to include a multiscale solving routine. The software selectively simulates different regions of a ferromagnetic sample according to the spin structures located within in order to employ a suitable discretization and use either a micromagnetic or an atomistic model. To demonstrate the validity of the multiscale approach, we simulate the spin wave transmission across the regions simulated with the two different models and different discretizations. We find that the interface between the regions is fully transparent for spin waves with frequency lower than a certain threshold set by the coarse scale micromagnetic model with no noticeable attenuation due to the interface between the models. As a comparison to exact analytical theory, we show that in a system with Dzyaloshinskii-Moriya interaction leading to spin spiral, the simulated multiscale result is in good quantitative agreement with the analytical calculation.