cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Recycling of Used Lubricating Oil Using Acid-Clay Treatment Process
Creators: name: Andargachew, Hayalu
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2014

description: Numerous industries are emerging in Ethiopia and urban developments are accelerated giving rise to multiple waste generations. As used lubrication oil is one of the hazardous wastes generated at different development sectors, it should not be utilized and/or disposed in ways which are unsafe to the environment hence calling for its proper management. This study primarily focuses on the recycling of used oil by applying acid-clay treatment process. Used engine oil properties gave expected undesired characteristics caused by oil deterioration. The characterization was indicative to the sources of contaminations from conditions during the oils application period. For instance, the lower flash point (132°C) indicated light fuel contamination effect; increased density (0.93 g/ml) and viscosity (kinematic Viscosity @ 40 °C was 126.41 cSt) showed possible oxidation and polymerization products dissolved and suspended in the used oil; and ash content (2.3%) indicated contamination from incombustible solid particles of dirt, dust, grit and metallic fragments. Similarly, deviations of other parameters also referred different contamination sources. Recycling experiments utilized 15, 20 and 25% acid and adsorbent (Bentonite clay) ratios with different combinations. Nine combinations with their respective triplicates were conducted. The experiments showed that the acid-clay treatment process was effective in recovering valuable oil from used oil samples with comparable qualities. From the twenty seven runs performed, yields within the range of 55% to 74.7 % was obtained. The run with acid percentage of 20% and adsorbent percentage of 15% was chosen as the optimum combination using statistical analysis that considered selected quality parameters of recovered oil i.e. density, kinematic viscosity @ 40 °C and ash content. The optimum combination gave a 69% yield; density of 0.886 g/ml; kinematic viscosity @ 40 °C of 94 cSt; and 0.34% ash content. Eight to ten percent of valuable light fuel was also recuperated from the vacuum distillation step of the process. The preliminary cost analysis showed, an estimated sum amount of 22.86 birr is expected to recover a liter of usable oil which is 61.64 birr less, relative to the amount required to import the original fresh oil that costs 84.5 birr/liter.
The reproductive tract microbiota and miscarriage
Creators: name: Grewal, Karen
Publisher: name: Imperial College London
Year: 2022

description: Early miscarriage (pregnancy loss before 12 weeks) occurs in 20 % of pregnancies of which half are due to aneuploidy. However, the mechanisms that drive euploid miscarriage are poorly understood and, despite its prevalence, there are no interventions that prevent sporadic miscarriage. Emerging evidence supports the role of the vaginal microbiota in adverse pregnancy outcome. Our group has previously shown that miscarriage is associated with vaginal dysbiosis but the cytogenetic status of those miscarriages was unknown. The existence and origin of an early pregnancy placental niche and the interaction between the rectal and vaginal microbiota in early pregnancy loss has not been addressed. Bacterial 16S rRNA gene based metataxonomic analysis was used to interrogate the vaginal microbiota in women who miscarried compared to term healthy pregnancies. The same approach was used to compare the trophoblast and rectal microbiota of miscarriage patients with termination of pregnancy patient controls. I have shown that, compared to aneuploid miscarriage, euploid miscarriage is associated with a significantly higher prevalence of Lactobacillus spp. deplete vaginal microbial communities. In women with Lactobacillus spp. deplete vaginal microbial communities, euploid miscarriage associates with higher concentrations of pro-inflammatory cytokines (measured using the Human Magnetic Luminex Screening 8-plex Assay) when compared to viable term pregnancy. Prevotella bivia and Streptococcus were identified as particularly common in euploid miscarriage and as drivers of proinflammatory cytokines. This shows that it is a combination of an adverse vagina microbiota and the maternal local immune response to it that predicts miscarriage. I have also demonstrated that there is a bacterial signal in trophoblast above the background contamination control, but it was difficult to account for cross contamination via the vaginal niche due to sample collection methods. In those that had an adverse vaginal microbiota significant rectal dysbiosis was seen in euploid compared to aneuploid miscarriage. Furthermore, a healthy gut microbiome appears to dampen the cervicovaginal immune response to Lactobacillus spp. deplete vaginal microbiota. Overall the findings presented in this thesis support the hypothesis that the vaginal microbiota plays an important aetiological role in euploid miscarriage and that the rectal or gut microbiota may modulate the inflammatory reaction to vaginal dysbiosis. These findings suggest that modulation of the vaginal and or rectal/gut microbiota, using prebiotics or live biotherapeutics may reduce the risk of miscarriage.
Mass-Imbalanced Superconductivity in Effective Two-Channel Kondo Lattice
Creators: name: Kusunose, Hiroaki
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We propose that mass-imbalanced superconductivity is realized in an effective two-channel Kondo lattice, and its characteristic property appears in electromagnetic responses such as the Meissner effect. Starting from an effective two-channel Kondo lattice model as a low-energy effective theory, and approximating it with two mean-field order parameter components in a self-consistent fashion, it is shown that the balance of the two components is sensitively reflected in the magnitude of the Meissner kernel, while thermodynamic properties are little affected by the balance. This remarkable behavior is understood by the localized character of one partner in the Cooper pair, namely, the effect of the mass imbalance. We briefly mention the relevance to the huge enhancement of the upper critical field under pressure observed in Pr 1-2-20 systems.
description: 5 pages, 4 figures
title: Temporal evolution of 142Nd signatures in SW Greenland – new insights from high precision MC-ICP-MS measurements
Creators: name: Hasenstab, Eric
name: Tusch, Jonas
name: Hoffmann, J. Elis
name: Fischer-Gödde, Mario
name: Szilas, Kristoffer
name: Münker, Carsten
Publisher: name: Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
Year: 2022

description:
The short-lived 146Sm-142Nd decay system is a powerful tool to investigate early geodynamic processes. Here, we introduce a new analytical protocol that allows measuring 142Nd/144Nd isotope compositions at the lowest ppm-level by MC ICP-MS. This new method is applied to various Archean to Proterozoic rock types (TTGs, boninites, tholeiites, dikes) from the Isua region, SW Greenland. While our results are consistent with previously reported elevated 142Nd/144Nd compositions[1,2], our study is the first to statistically resolve small 142Nd/144Nd isotope differences between rocks from the 3.7 Ga and the 3.8 Ga units of the Isua supracrustal belt. Further, we generally observe a strong decrease of 142Nd anomalies between 3.8 Ga and 3.4 Ga, likely linked to the progressive admixture of unfractionated bulk silicate Earth material that progressively replenished the mantle beneath the Isua region. Such a geodynamic model is also in accord with observational constraints from trace elements and long- and short-lived radiogenic isotopes. The recurrence of elevated 142Nd/144Nd compositions in younger Mesoarchean rocks (~2.97-3.08 Ga) and one Proterozoic dike (~2.0 Ga) can be explained by mantle sources that were influenced by older Eoarchean recycled components or crustal contamination, respectively. This is also consistent with unradiogenic initial ɛ176Hf and ɛ143Nd values and enriched incompatible trace element patterns that have been reported for some of these rocks[3].

[1] Caro et al. (2006), GCA, 70, 164-191. [2] Saji et al. (2018), GPL, 7, 43-48. [3] Szilas et al. (2015), MM, 79, 857-876.
Study on Pantograph Arcing and Investigation of its Influencing Parameters: Case Study-Addis Ababa Light Rail Transit
Creators: name: Dawit, Seboka
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2016

description: In electrified railways sliding contact between pantograph and overhead contact wire is one of the main modes of power feeding to the electrical drives and propulsion system within the railway. The traction supply could be either AC or DC at different voltage levels. Arcing from the pantograph is a commonly observed phenomenon and also the major source of Electromagnetic Interference (EMI) in the electrified railway system. This thesis presents the study of pantograph arcing and investigation of its influential parameters for the case of Addis Ababa Light rail transit (AA-LRT). The contact between the pantograph and the contact wire is the focus point for the design of an electrified railway system in order to keep the proper contact between them. The pantograph-overhead contact system is the system of electrified railway which is the place where pantograph arcing occurs due to the contact loss. The effects of contact distance, the weather condition, the vibration of the contact wire and the speed of the vehicle are simulated using MATLAB based on the mathematical modeling presented of this system and then analyzed for the case of AA-LRT. As the result, the weather condition and the speed of the vehicle has no any effect on the occurrence of arcing. In the case of contact distance, pantograph arcing occurs if the separation of the pantograph is not greater than 0.25mm. However, the effect of vibration of the contact wire has been found a serious cause for pantograph arcing. The pattern of the vibration is simulated for different span length (20m, 30m, 50m) and the weight of the catenary. In order to avoid the contact loss produced by the vibration of the contact wire, the minimum distance between two consecutive pantographs shall be 167 meters. Finally, it has been recommended that the railway company running the AA-LRT will not send its vehicles uncoupled so as to avoid the effect of the front pantograph onto the next pantograph.
Исследование антиоксидантной активности экстрактов ароматических растений, полученных с применением ферментативной ультразвуковой экстракции
Creators: name: Минина, Наталья
Publisher: name: ИП Соколова М.В.
Year: 2022
Subjects: растительные экстракты
антиоксидантная активность
розмарин
тмин
душица
ферментативная ультразвуковая экстракция.

description: Международный научно-исследовательский журнал, №8(122) (2022)
Insulating nanomagnets driven by spin torque
Creators: name: Jungfleisch, Matthias B.
name: Ding, Junjia
name: Zhang, Wei
name: Jiang, Wanjun
name: Pearson, John E.
name: Novosad, Valentine
name: Hoffmann, Axel
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Magnetic insulators, such as yttrium iron garnet (Y$_3$Fe$_5$O$_{12}$), are ideal materials for ultra-low power spintronics applications due to their low energy dissipation and efficient spin current generation and transmission. Recently, it has been realized that spin dynamics can be driven very effectively in micrometer-sized Y$_3$Fe$_5$O$_{12}$/Pt heterostructures by spin-Hall effects. We demonstrate here the excitation and detection of spin dynamics in Y$_3$Fe$_5$O$_{12}$/Pt nanowires by spin-torque ferromagnetic resonance. The nanowires defined via electron-beam lithography are fabricated by conventional room temperature sputtering deposition on Gd$_3$Ga$_5$O$_{12 }$ substrates and lift-off. We observe field-like and anti-damping-like torques acting on the magnetization precession, which are due to simultaneous excitation by Oersted fields and spin-Hall torques. The Y$_3$Fe$_5$O$_{12}$/Pt nanowires are thoroughly examined over a wide frequency and power range. We observe a large change in the resonance field at high microwave powers, which is attributed to a decreasing effective magnetization due to microwave absorption. These heating effects are much more pronounced in the investigated nanostructures than in comparable micron-sized samples. By comparing different nanowire widths, the importance of geometrical confinements for magnetization dynamics becomes evident: quantized spin-wave modes across the width of the wires are observed in the spectra. Our results are the first stepping stones toward the realization of integrated magnonic logic devices based on insulators, where nanomagnets play an essential role.
Cathodic protection criteria for reinforced concrete structures
Creators: name: Lourenco., Maria Zita
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 Comfort for Passenger Train from Dire-Dawa to Djibouti
Creators: name: Mekonnen, Tadesse
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2015

description: People spend a considerable time in vehicles; cars, trains, planes, buses or subway. This is the reason why the thermal comfort has more and more paid attention. In one hand people try to make comfort whatever they are at home, office or in car. In the other hand the thermal conditions in the cabin of vehicles and passenger compartments directly influences on the drivers and passengers safety, Now a day the railway transport infrastructure in Ethiopia is the major issues in relation to the development of the country. To make the sector more competitive with other transportation modes it is better to design effective air conditioning system for a rail vehicle locally based on the specific working environment, so as to make passengers more comfortable. After all, passengers want to have a comfortable journey and arrive at their destination rested, so keeping train passenger compartment at a pleasant temperature is crucial. The main objective of this thesis is designing of air conditioning system for a rail vehicle passenger compartment locally, while travelling through the route DireDawa-Djibouti. In this paper the thermal load analysis is done in two ways; by using Analytical methods based on ASHRAE for the Design and Application of Heating, Ventilation and Air Conditioning Equipment for Rail Passenger Vehicles and by using Hourly analysis program (HAP) software. During thermal load analysis car body conductive heat gain, solar radiation heat gain, glazing conductive heat gain, glazing solar radiation heat gain, passenger and operator cooling loads, ventilation cooling load, interior lighting heat gains, fan and fan motor heat gains, passenger door cycling air-infiltration cooling load and other miscellaneous internal heat gains have been considered. And the total cooling load using both methods HAP and Analytical methods is calculated as 74.2kw and 78.22kw respectively based on passenger compartment comfort parameters to be kept at a temperature of 23.50C and a relative humidity of 50%. And finally the suitable vehicle AC system has been designed.
title: Weathering geochronology of a deep (> 120 m) lateritic profile in northern Brazil
Creators: name: Heller, Beatrix
name: Allard, Thierry
name: Sanchez, Caroline
name: Taitson Bueno, Guilherme
name: Roig, Jean-Yves
name: Gautheron, Cécile
Publisher: name: Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
Year: 2022

description:
Tropical weathering leads to the formation of deep weathering profiles called laterites. The Guiana shield has been tectonically stable and in tropical latitudes supposedly since the Cretaceous, allowing the formation of very deep (> 100 m) and old (tens of Ma) lateritic profiles.

In this contribution we present a coupled data set of kaolinite electron paramagnetic resonance (EPR) ages and (U-Th)/He ages of supergene hematite and goethite from a deep (> 120 m) weathering profile exposed in an open pit gold mine in the northern Brazilian state of Amapá. Coupling of the two methods which target different components of the lateritic profile allows us to reconstruct the formation and evolution of the presented profile throughout the entire Cenozoic. While (U-Th)/He ages on supergene hematite and goethite from the ferruginous duricrusts on the top of the profile record three discrete weathering events during the Late Cretaceous/Early Paleocene, Oligocene and Middle Miocene, kaolinite ages allow an insight into the vertical evolution of the profile. The oldest kaolinites, which are very well-ordered, are preserved in the saprolitic part of the profile whereas the kaolinites in the top of the profile show very recent (< 5Ma) rejuvenation. Disordered kaolinite captured in the lateritic duricrust was protected from this rejuvenation.
Structural and functional characterisation of Uric Acid Permease, a fungal nucleobase transporter, with novel substrates
Creators: name: Deacon-Smith, Nicole
Publisher: name: Imperial College London
Year: 2022

description: The development of novel antifungals capable of eliminating Aspergillus fungal infections and improving patient outcomes in Aspergillosis is essential. This work has focussed on Uric Acid Permease, a nucleobase-ascorbate transporter from Aspergillus nidulans, as a potential antifungal carrier. The existing crystal structure of UapA-G411VΔ1-11 in complex with xanthine (PDB 5I6C)1, has provided invaluable information about the substrate binding site, and allowed for the structure-guided design of derivatised xanthine analogues. Competitive uptake assays were used to obtain the binding affinity of each of the analogues for UapA in Aspergillus nidulans. 3-benzylxanthine (5) was identified as a novel ligand of UapA, binding with 35x higher affinity (KI = 0.2 μM) than the native substrates xanthine (KM = 7 μM) and uric acid (KI = 7 μM). This work describes the functional characterisation of 3-benzylxanthine (5) using fungal growth assays, and fluorescence microscopy. The effect of this substrate on UapA-WT and the thermostabilised mutants UapA-G411VΔ1-11 and UapA-Q408EΔ1-11 was assessed using cellular thermal shift assays (CETSA), fluorescence size-exclusion chromatography (FSEC), CPM-based thermostability assays and nano-differential scanning fluorimetry (nano-DSF). While these approaches had their challenges, they all demonstrated that 3-benzylxanthine (5) did not significantly destabilise UapA-WT or the thermostabilised mutants UapA-G411VΔ1-11 and UapA-Q408EΔ1-11. The later part of this work describes attempts to structurally characterize the binding interaction between 3-benzylxanthine (5) and UapA using X-ray crystallography, hydrogen-deuterium mass spectrometry (HDX-MS) and cryo-electron microscopy (cryo-EM). While the structure of UapA-WT or its mutants with 3-benzylxanthine (5) has not yet been resolved, preliminary results from hydrogen-deuterium mass spectrometry (HDX-MS) suggest that 3-benzylxanthine (5) may bind an outward or occluded conformation of UapA-Q408EΔ1-11. Structural characterisation of UapA with 3-benzylxanthine (5) using cryo-EM is ongoing. Once resolved, this will form the basis of future structure-guided xanthine analogue design initiatives.
title: Fingerprinting fluid evolution and metal distribution in the Skouries porphyry Au-Cu deposit (NE Greece) by mineral micro-analysis
Creators: name: Höss, Alica
name: Klemd, Reiner
name: Keith, Manuel
name: Voudouris, Panagiotis
name: Melfos, Vasilios
name: Gerlach, Lisa
name: Haase, Karsten
name: Baker, Tim
Publisher: name: Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
Year: 2022

description:
The Skouries deposit in NE Greece is a platinum-group element enriched (⌀=149 ppb Pd, ⌀=30 ppb Pt) Au-Cu porphyry system hosted by monzonite-syenite intrusions. The porphyry stockwork consists of quartz-rich A- and B-type veins associated with potassic alteration, followed by massive sulfide-bearing veins related to chlorite-sericite alteration, and D-type veins associated with sericitic alteration. The mineralization is dominated by chalcopyrite, pyrite, bornite, and magnetite associated with native gold and Bi-Pd-rich telluride inclusions. The mineral chemistry (EPMA and LA-ICP-MS) of chalcopyrite, pyrite, magnetite, and hydrothermal quartz was used to track the physiochemical fluid evolution, and to define mechanisms enhancing metal enrichment at Skouries.

Textural differences of hydrothermal quartz generations, as reflected by distinct CL-SEM intensities, were linked to Ti-in-quartz-thermometry and quartz trace element ratios, such as Ge/Ti, Sb/Ti and Al/Ti. These ratios record temperatures around 600°C for the A-type veins, suggest a reopening of veins by a second, hotter fluid pulse (>600°C), which was followed by a decrease in temperature below 600°C for the later B-type veins. Furthermore, the sulfide mineralization is characterized by systematic variations in trace element concentrations (e.g., As, Ag, Au) and ratios (e.g., Au/Cu, Co/TI, Se/Te, As/Sb) fingerprinting physiochemical changes in the hydrothermal fluid system. Therefore, sulfide and quartz micro-analysis can help decipher small-scale processes within the porphyry system and allow to establish mechanisms controlling the metal endowment of porphyry deposits on a larger scale.
БРУЦЕЛЛЕЗ ЖИВОТНЫХ НА ТЕРРИТОРИИ РОСТОВСКОЙ ОБЛАСТИ
Creators: name: Сообщество рецензентов Международного научно-исследовательского журнала
Publisher: name: ИП Соколова М.В.
Year: 2022
Subjects: бруцеллез
животные
эпизоотическая ситуация
иммунологические методы
заболеваемость

description: Международный научно-исследовательский журнал, №8(122) (2022)
Parametric Optimization and Characterization of Ferulic Acid Produced from Brewery Spent Grains
Creators: name: Hagos, Kalu
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2019

description: The utilization of agro-industrial wastes for the extraction of natural antioxidants such as Ferulic acid is currently getting a growing interest by the researchers around the world. This research study, therefore, aims at optimizing and characterizing the Ferulic acid extracted from brewery spent grains (BSG). Brewery spent grain was first treated with sulphuric acid before it was subjected to alkaline hydrolysis. The X-ray diffraction analysis of the raw and hydrolyzed BSG showed the evidence for a possible release of phenolic extractives after the hydrolysis. The effect of extraction time, extraction temperature, and alkali concentration on the Ferulic acid yield was studied at (60, 90, and 120 °C), (100, 120 and 140 min), and (1, 2 and 3% (w/v)) respectively. Optimization of these extraction parameters was carried out by the Box Behnken Design, using the Response Surface Methodology (Design experiment software version 11). It was observed that the Ferulic acid yield at different runs ranged from 6.62 mg/100 g BSG to 45.245±0.585 mg/100 g BSG. An optimum Ferulic acid yield of 46.85 mg/100 g BSG was observed at 119.83 °C, 97.04 min, and 2.21% (w/v) NaOH concentration. Both the Fourier Transform Infrared Spectroscopy (FT-IR) and High-Performance Liquid Chromatography (HPLC) analysis showed that the BSG was a good candidate for the extraction of the Ferulic acid. All the three main factors considered for this research study, namely the extraction time, extraction temperature and sodium hydroxide concentration had a statistically significant effect on the yield of Ferulic acid extracted. Spectrophotometric analysis of the produced Ferulic acid using DPPH radical scavenging method showed a strong capacity of its antioxidant activity. The result of the present research provides an alternative insight into the waste management of brewery spent grains (BSG) through the production of Ferulic acid.
Using porous boron nitride in adsorption-based processes: investigation of material challenges and opportunities
Creators: name: L'Hermitte, Anouk
Publisher: name: Imperial College London
Year: 2023

description: In 2016, industrial separation processes accounted for 10-15% of the global energy consumption. This striking figure has urged the scientific community to continue developing new materials and technologies to significantly reduce global emissions in industry, for example in the field of adsorption processes. In light of this, porous boron nitride (BN) has gradually appeared as a promising adsorbent owing to its tunable chemistry and porosity, which a priori make it adaptable for various applications. However, research on porous BN remains at laboratory scale due to a lack of understanding of its formation mechanism. Furthermore, the material has displayed hydrolytic instability, which is an issue due to the presence of moisture in most industrial settings. Finally, the use of porous BN has mainly been focusing on molecular separations, but little is known about its potential for other adsorption-based applications, such as thermal energy storage. In this thesis, I first investigated the formation mechanism of porous BN to shed light on the critical steps of its synthesis. Considering a wide range of separations, I then searched new ways of enhancing its hydrolytic stability via surface functionalization. I developed two methods involving organosilane grafting, which produced porous BN adsorbents with enhanced moisture resistance and adequate CO2/N2 selectivity in the context of CO2 capture. Finally, I expanded the range of possible applications using porous BN and researched its potential for thermochemical energy storage, which has recently emerged as a key technology to mitigate CO2 emissions. I prepared BN-based adsorbents with various structural and thermal properties, allowing to understand how material properties affect the performance in thermochemical energy storage via adsorption. Overall, this thesis presents new knowledge on porous BN and explores the opportunities and challenges associated with its unique properties in the context of adsorption-based applications, in particular CO2/N2 separation and thermochemical energy storage.
Uncertainty product of an out-of-equilibrium Bose-Einstein condensate
Creators: name: Klaiman, Shachar
name: Streltsov, Alexej I.
name: Alon, Ofir E.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The variance and uncertainty product of the position and momentum many-particle operators of structureless bosons interacting by a long-range inter-particle interaction and trapped in a single-well potential are investigated. In the first example, of an out-of-equilibrium interaction-quench scenario, it is found that, despite the system being fully condensed, already when a fraction of a particle is depleted differences with respect to the mean-field quantities emerge. In the second example, of the pathway from condensation to fragmentation of the ground state, we find out that, although the cloud's density broadens while the system's fragments, the position variance actually decreases, the momentum variance increases, and the uncertainty product is not a monotonous function but has a maximum. Implication are briefly discussed.
description: 14 pages, 3 figures
Photo-realistic face synthesis and reenactment with deep generative models
Creators: name: Doukas, Michail Christos
Publisher: name: Imperial College London
Year: 2022

description: The advent of Deep Learning has led to numerous breakthroughs in the field of Computer Vision. Over the last decade, a significant amount of research has been undertaken towards designing neural networks for visual data analysis. At the same time, rapid advancements have been made towards the direction of deep generative modeling, especially after the introduction of Generative Adversarial Networks (GANs), which have shown particularly promising results when it comes to synthesising visual data. Since then, considerable attention has been devoted to the problem of photo-realistic human face animation due to its wide range of applications, including image and video editing, virtual assistance, social media, teleconferencing, and augmented reality. The objective of this thesis is to make progress towards generating photo-realistic videos of human faces. To that end, we propose novel generative algorithms that provide explicit control over the facial expression and head pose of synthesised subjects. Despite the major advances in face reenactment and motion transfer, current methods struggle to generate video portraits that are indistinguishable from real data. In this work, we aim to overcome the limitations of existing approaches, by combining concepts from deep generative networks and video-to-video translation with 3D face modelling, and more specifically by capitalising on prior knowledge of faces that is enclosed within statistical models such as 3D Morphable Models (3DMMs). In the first part of this thesis, we introduce a person-specific system that performs full head reenactment using ideas from video-to-video translation. Subsequently, we propose a novel approach to controllable video portrait synthesis, inspired from Implicit Neural Representations (INR). In the second part of the thesis, we focus on person-agnostic methods and present a GAN-based framework that performs video portrait reconstruction, full head reenactment, expression editing, novel pose synthesis and face frontalisation.
title: Melting and subsolidus reaction in the system Mg(OH)2-MgCO3 between 2 and 12 GPa
Creators: name: Sieber, Melanie Jutta
name: Reichmann, Hans-Peter
name: Farla, Robert
name: Koch-Müller, Monika
Publisher: name: Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
Year: 2022

description:
CO2 and H2O are the most abundant volatile components in the Earth’s crust and mantle. The presence of CO2, H2O and mixtures of H2O-CO2 effect the phase relations of mantle lithologies. The H2O-CO2-MgO system, providing the basis for more complex systems, is poorly constrained from some quenched experiments. Here we investigated by in ‑ situ X‑ray diffraction measurements using the large volume press at P61B at PETRA III (DESY) the subsolidus and melting reaction of magnesite mixed with 16 wt% brucite.

We report the melting reaction of magnesite + periclase + vapour à liquid between 6 and 12 GPa and the subsolidus reaction magnesite à periclase + vapour between 2 and 4.8 GPa. These reactions meet at an invariant point at about 5 GPa and 1500 ℃. This invariant point was reported at lower pressure of 3.2 GPa by Ellis [1] who investigated the topology of subsolidus and melting reactions in the H2O-CO2-MgO system theoretically. Between 5 and 12 GPa and in the presence of a CO2-H2O vapour phase, magnesite melts at a temperature about 90 ℃ lower than under anhydrous conditions. This improves previous results from quenched multi-anvil experiments locating the melting point of hydrous magnesite at 6 GPa 50 ℃ lower than the melting point of anhydrous magnesite [2].

1 Ellis and Wyllie, Carbonation, hydration, and melting relations in the system MgO-H2O-CO2 at pressures up to 100 kbar. American Mineralogist, 1979. 64(1-2): p. 32-40.

2 Müller, Koch-Müller, Rhede, Wilke, and Wirth, Melting relations in the system CaCO3-MgCO3 at 6 GPa. American Mineralogist, 2017. 102(12): p. 2440-2449.
Monitoring varying speed machinery vibrations
Creators: name: Lopatinskaia., Elita
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.
Active region fine structure observed at 0.08 arcsec resolution
Creators: name: Schlichenmaier, R.
name: von der Lühe, O.
name: Hoch, S.
name: Soltau, D.
name: Berkefeld, T.
name: Schmidt, D.
name: Schmidt, W.
name: Denker, C.
name: Balthasar, H.
name: Hofmann, A.
name: Strassmeier, K. G.
name: Staude, J.
name: Feller, A.
name: Lagg, A.
name: Solanki, S. K.
name: Collados, M.
name: Sigwarth, M.
name: Volkmer, R.
name: Waldmann, T.
name: Kneer, F.
name: Nicklas, H.
name: Sobotka, M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The various mechanisms of magneto-convective energy transport determines the structure of sunspots and active regions. We characterise the appearance of light bridges and other fine-structure details and elaborate on their magneto-convective nature. We present speckle-reconstructed images taken with the broad-band imager at the 1.5 m GREGOR telescope in the 486nm and 589nm bands. We estimate the spatial resolution from the noise characteristics of the image bursts and obtain 0.08" at 589nm. We describe structure details in individual best images as well as the temporal evolution of selected features. We find branched dark lanes extending along thin (~1") light bridges in sunspots at various heliocentric angles. In thick (~2") light bridges the branches are disconnected from the central lane and have a Y shape with a bright grain toward the umbra. The images reveal that light bridges exist on varying intensity levels and that their small-scale features evolve on timescales of minutes. Faint light bridges show dark lanes outlined by the surrounding bright features. Dark lanes are very common and are also found in the boundary of pores. They have a characteristic width of 0.1" or smaller. Intergranular dark lanes of that width are seen in active region granulation. While central dark lanes in thin light bridges are elevated and associated with an density increase above upflows, the dark lane branches correspond to locations of downflows and are depressed relative to the adjacent bright plasma. Thick light bridges with central dark lanes show no projection effect. They have a flat elevated plateau that falls off steeply at the umbral boundary. There, Y-shaped filaments form as they do in the inner penumbra. This indicates the presence of inclined magnetic fields, meaning that the umbral magnetic field is wrapped around the convective light bridge.
description: 11 pages, accepted for publication in A&A on 22/07/2016, language-edited version
GAS TURBINE ENGINE SEAL LEAK TEST METHOD SELECTION
Creators: name: Сообщество рецензентов Международного научно-исследовательского журнала
Publisher: name: Sokolova M.V.
Year: 2022
Subjects: labyrinth seals
gas turbine engine
guidance technical materials
solid state modeling
Python language

description: Международный научно-исследовательский журнал, №8(122) (2022)
Optimization of Activated Carbon Preparation Process from Sesame (Sesamum Indicum) Husks and Its Application for Adsorption of Cr(Vi) Ions from Aqueous Solution
Creators: name: Mohammedali, Ibrahim
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2015

description: The demand for activated carbon is increasing owing to the increased utility of the carbon materials in pollution control. As a result, cost of activated carbon is also growing depending on the application. Designing ways for the production of activated carbon through economic ways is the need of the hour. A range of low cost, easily available, carbon rich and low ash precursors and sources are being explored for the production of carbon materials. This research has presented sesame (Sesamum indicum) husks as row material for preparation of low cost activated carbon and assessed its potential application for adsorption of Cr(VI) from aqueous solution. Process variables for sesame husk activated carbon preparation were optimized response surface methodology (RSM). The effect of activating agent concentration, impregnation ratio, carbonization temperature and holding time were analyzed as main factor variable based on BBD. Adsorption % of Cr(VI) was used as response variable. The statistical significance of the model was investigated by ANOVA. The optimum condition during sesame husk based activated carbon preparations was found 30min, 614.70C, 1M, 1w/w and 76.41 for holding time, Carbonization Temperature, Concentrations of Activating agent, Impregnations Ratio and Adsorptions % respectively at pH 2, amount of adsorbent dosage of 0.5g in 100mL solutions and temperature of 250C. Characterization result shows sesame husk can be used as row material for productions of activated carbon with comparable property with other reported activated carbons. The optimum pH value for the adsorptions of was determined to be 2, at which the Cr(VI) removal of were determined to be approximately 76%. The uptake of chromium from solution by SHAC increased with contact time and attained equilibrium at 360min for all of the temperatures studied. The adsorptions kinetics of pseudo-first order and pseudo-second-order rate equations were tested on the kinetic data and the adsorptions process was found to follow pseudo-secondorder rate kinetics for all temperature. The Langmuir and Freundlich isotherm models were applied to the experimental equilibrium data depending on temperature at 30, 40 and 50oC, and the isotherm constants were determined by using linearized correlations coefficient. Equilibrium data were represented better by the Freundlich model than the Langmuir model. Freundlich equations was found to fit the equilibrium data for Cr(VI) adsorption with monolayer capacity of 18.34, 17.54 and 16.01 at 30, 40, and 500C respectively.
title: Experimental Simulation of Liquid Immiscibility in a Primitive Silicate-Carbonatite System
Creators: name: Simon, Antonia
name: Botcharnikov, Roman
name: Holtz, François
name: Voropaeva, Daria
name: Tichomirowa, Marion
name: Buhre, Stephan
Publisher: name: Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
Year: 2022

description:
Despite being the most important source of rare earth elements (REE), the formation of carbonatites as well as the enrichment processes of rare metals in these rocks remain elusive. While direct partial melting from a carbonated mantle source may account for some carbonatite occurrences, most carbonatites are spatially associated with Si-undersaturated, peralkaline magmatic silicates. The latter form either by crystal fractionation from a silicate parental melt, by separation of immiscible carbonatite from a carbonated silicate magma or a combination thereof. Currently, most experimental studies on carbonatite formation focus on evolved or simplified systems. In existing experiments, rare metals partially favour silicate over carbonatite melts, contradicting proposed enrichment processes.

In this study, we report on experiments simulating a primitive silicate-carbonatite system. As a starting material we used a synthetic trace element doped silicate glass, modelled after perovskite-hosted melt inclusions from the Kola Alkaline Province. To generate liquid immiscibility, carbonatite powder was added in varying proportions and run with/without water. The glass-powder mixtures were heated to 1250 °C at 500 MPa in an internally heated pressure vessel. While high proportions of silicate over carbonatite led to the generation of a homogeneous, carbonated silicate glass, liquid immiscibility was reached at proportions of 1:2 (silicate:carbonatite) alongside crystallisation of calcite. Mixing silicate and carbonatite 1:1 with addition of water resulted in the separation of a silicate glass from quench carbonatite, the latter containing idiomorphic perovskite. The high compatibility of REE in perovskite can strongly affect the rare metal partitioning and mobility in the immiscible liquids.
A matrix variation on Ramus's identity for lacunary sums of binomial coefficients
Creators: name: Dobson, John Blythe
Publisher: name: arXiv
Year: 2016
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11A07

description: We study the well-known lacunary sums of binomial coefficients considered, most notably, by Christian Ramus, and their connection to a special kind of harmonic number associated with the first case of Fermat's Last Theorem. For one case of Ramus's famous identity we obtain a variation in which some of the parameters are replaced by square matrices of arbitrary dimension.
Речеповеденческая тактика «разрешение» как объект изучения в курсе русского языка как иностранного
Creators: name: Безденежных, Наталия
Publisher: name: ИП Соколова М.В.
Year: 2022
Subjects: речеповеденческая тактика
разрешение
обучение
русский как иностранный

description: Международный научно-исследовательский журнал, №8(122) (2022)
Pressurised steam-fluidized bed drying
Creators: name: Looi., Art Yew
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 the Effect of Malfunctioning of Locomotive Triple Valve on Brake Time
Creators: name: Addisu, Shigute
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2016

description: Triple valve malfunction (triple valve defect) causes an effect on braking distance, braking time and braking force. [10]. From those defects leakage through triple valve piston, sliding valve and graduating valve are taken for analyzing the effects of malfunctioning of locomotive triple valve on braking time. The defects during leakages through triple valve piston head, triple valve piston rod, sliding valve and graduating valve causes air pressure to decreases lower than air pressure during normal operation of triple valve. Maximum and minimum pressure losses during leakages through triple valve piston head, triple valve piston rod, sliding valve and graduating valve are taken for Analyzing braking distance, braking time and braking time. The mathematical modeling during pressure losses through those triple valve components are used for modeling block diagram by Simulink matlab during leakages through triple valve piston head, triple valve piston rod, sliding valve and graduating valve. The simulation is modeled by using Simulink matlab. The simulation result shows triple valve with maximum and minimum % of leakages increases braking time and braking distances, but decreases braking forces
title: Exploring meteorite collections via non-destructive micro X‑ray fluorescence analysis
Creators: name: Hecht, Lutz
name: Greshake, Ansgar
name: Kaufmann, Felix
name: Hamann, Christopher
name: Schultze, Dina
name: Tagle, Roald
Publisher: name: Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
Year: 2022

description:
Meteorites offer a unique view on the formation and evolution of our solar system. Thousands of such samples exist in meteorite collections all over the world; however, this resource is by far not fully explored. One reason, among others, is that some rare meteorites , particularly those of historic importance, are usually museum objects. The sampling of such material should be avoided or significantly reduced, for example, by using non-destructive analytical tools. For this, spatially resolved X-ray fluorescence (micro-XRF) is an ideal technique. Several micro-XRF instruments that are currently available allow studying samples in the size range of meters to sub-millimeters with high spatial resolutions in the low µm range. There are several major advantages in micro-XRF with respect to other conventional micro-analytical instruments (e.g., SEM) including (1) the capability to handle large samples; (2) low detection limits (usually below those of SEM EDX systems), and (3) high analysis speed allowing to cover large areas in relative short time. We explore the analytical capacity of two different micro-XRF instruments. The first is an open beam system (M6 JETSTREAM) and the second (M4 TORNADO Plus) is an instrument with a vacuum chamber and several options for improving the light-element sensitivity. Here, we present several case studies from chondrites and achondrites with sample sizes up to 16 × 20 cm. We evaluate quantification of chemical compositions (whole rock, fragments and mineral components) by standard-free and standard-based methods and discuss possible micro-XRF-based classification of meteorites based on established criteria.
Direct fabrication and IV characterization of sub-surface conductive channels in diamond with MeV ion implantation
Creators: name: Olivero, P.
name: Amato, G.
name: Bellotti, F.
name: Borini, S.
name: Giudice, A. Lo
name: Picollo, F.
name: Vittone, E.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In the present work we report about the investigation of the conduction mechanism of sp2 carbon micro-channels buried in single crystal diamond. The structures are fabricated with a novel technique which employs a MeV focused ion-beam to damage diamond in conjunction with variable thickness masks. This process changes significantly the structural proprieties of the target material, because the ion nuclear energy loss induces carbon conversion from sp3 to sp2 state mainly at the end of range of the ions (few micrometers). Furthermore, placing a mask with increasing thickness on the sample it is possible to modulate the channels depth at their endpoints, allowing their electrical connection with the surface. A single-crystal HPHT diamond sample was implanted with 1.8 MeV He+ ions at room temperature, the implantation fluence was set in the range 2.1x10^16 - 6.3x10^17 ions cm^-2, determining the formation of buried micro-channels at 3 um. After deposition of metallic contacts at the channels' endpoints, the electrical characterization was performed measuring the I-V curves at variable temperatures in the 80-690 K range. The Variable Range Hopping model was used to fit the experimental data in the ohmic regime, allowing the estimation of characteristic parameters such as the density of localized states at the Fermi level. A value of 5.5x10^17 states cm-3 eV-1 was obtained, in satisfactory agreement with values previously reported in literature. The power-law dependence between current and voltage is consistent with the space charge limited mechanism at moderate electric fields.
description: 17 pages, 8 figures