cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Assessment On Critical Success Factors Of Construction Projects (A Case Of Ethiopian Shipping And Logistics Services Enterprise Construction Projects)
Creators: name: Alem, Ayinetaw
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2018

description: This study presents an assessment of the critical success factors in ESLSE construction projects. To achieve this aim, questionnaires were administered to all contractors, project managers, consultants, engineers in different levels, supervisors, foremen, and various technicians who work on ESLSE seven active construction projects in Addis Ababa and Modjo city. The critical success factors are summarized in components, that is, comfort, competence, communication and commitment (COMs). These components frame the four COMs model which forms a basis for evaluation of the questionnaires. An in-depth analysis review of the literature on the critical success factors in the construction projects has affirmed the four COMs model. The interpretation of this quantitative study was conducted with the use of descriptive statistics presented in a tabular format. The findings revealed that more than 61% of the respondents agree and strongly agree that the critical success factors are found practical in ESLSE. There was difference in their application on the four COMs of critical success factors in ESLSE, given the demographic differences between them. The critical success factors identified in this study have provided a way forward for project managers, contractors and other executers in ESLSE construction projects and others. Hence, the results presented in this study can be used as a guideline for successful execution of construction projects in ESLSE. ESLSE can modify the approach it should focus on and adjust trainings towards the employees. More over ESLSE should adjust the requirements the contractors should fulfill
Asymptotically locally flat and AdS higher-dimensional black holes of Einstein-Horndeski-Maxwell gravity in the light of EHT observations: shadow behavior and deflection angle
Creators: name: Nozari, Kourosh
name: Saghafi, Sara
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Unification of gravity with other interactions, achieving the ultimate framework of quantum gravity, and fundamental problems in particle physics and cosmology motivate to consider extra spatial dimensions. The impact of these extra dimensions on the modified theories of gravity has attracted a lot of attention. One way to examine how extra dimensions affect the modified gravitational theories is to analytically investigate astrophysical phenomena, such as black hole shadows. In this study, we aim to investigate the behavior of the shadow shapes of higher-dimensional charged black hole solutions including asymptotically locally flat (ALF) and asymptotically locally AdS (ALAdS) in Einstein-Horndeski-Maxwell (EHM) gravitational theory. We utilize the Hamilton-Jacobi method to find photon orbits around these black holes as well as the Carter approach to formulate the geodesic equations. We examine how extra dimensions, negative cosmological constant, electric charge, and coupling constants of the EHM gravity affect the shadow size of the black hole. Then, we constrain these parameters by comparing the shadow radius of these black holes with the shadow size of M87* supermassive black hole captured by the Event Horizon Telescope (EHT) collaborations. We discover that generally the presence of extra dimensions within the EHM gravity results in reducing the shadow size of higher-dimensional ALF and ALAdS charged black holes, whereas the impact of electric charge on the shadow of these black holes is suppressible....
description: Accepted for publication in The European Physical Journal C, 31 pages, 14 figures
Receipt
Creators: name: Lucero, F. L.
Publisher: name: University of Victoria Libraries
Year: 2020
Subjects: subject: Business records
valueUri: http://id.worldcat.org/fast/842845
subject: Preuss, Siegfried

description: Receipt stating that Fred Preuss had paid $11.25 for oil and gas fees. Signed by F. L. Lucero, the county clerk of Sandoval County in New Mexico.
title: ИМПРЕСАРИО СКАНДАЛОВ И ВПЕЧАТЛЕНИЙ: ВКЛАД СЕРГЕЯ ДЯГИЛЕВА В РАЗВИТИЕ РУССКОГО ТЕАТРАЛЬНОГО ИСКУССТВА
Creators: name: Яковлева, Елена
Publisher: name: Новгородский государственный университет имени Ярослава Мудрого (НовГУ)
Year: 2022

description: Объектом исследования стала продюсерская деятельность Сергея Павловича Дягилева. Он прославил русское искусство благодаря значимым выставочным и театральным проектам. Биографический анализ позволил нам выявить следующие черты, используемые Дягилевым в продюсировании своих проектов: наличие колоссальной энергии, властного характера и знаний психологии людей, поддержание духа коллективного сотворчества, постоянный поиск новых идей и талантов. Обладая полимодальным способом восприятия, Сергей Павлович умел целостно, в мельчайших деталях видеть свое будущее детище, что способствовало успеху его постановок. Следует сказать, что знаменитый импресарио, являясь типичным представителем мира искусства, довольно часто сам оказывался в эпицентре скандалов и интриг.
Determinants of Bank Lending Rates: Empirical Study on Commercial Banks in Ethiopia
Creators: name: Habtamu, Amsalu
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2019

description: This study investigates and analyzes bank-specific variables and external determinant factors of lending rates of commercial banks" in Ethiopia. Seven factors (five bank specific and two macroeconomic factors) affecting banks lending rate were identified and analyzed. Internal factors selected under this study consists of several aspects such as operating expenses, deposit rate, non-interest income, liquidity and asset size, while external variables included are GDP and inflation. Thirteen commercial banks have been the subject for the study ranging from the period 2010 to 2017. A quantitative research approach and explanatory design were adopted in carrying out this research. The study had employed panel data estimation techniques to analyze the influence of bank specific and macroeconomic factors on lending rate. The random effect panel regression technique was applied to estimate the model using the econometric software package EViews 9. The results indicate that lending rates are significantly impacted by variables associated with higher cost structures or lower income. The results of balanced random effect panel data regression analysis showed that operating costs, deposit rate, liquidity, asset size and GDP have a positive and statistically significant relationship with lending rate. On the other hand, non-interest income has negative and statistically significant effect on lending rate, suggesting that variable that help improve bank"s income tend to benefit borrowers by lowering the interest they pay. The findings of the study also showed negative and significant relationship among inflation and lending rate of Ethiopian commercial banks. The findings of this study indicated that bank policies that reduce bank costs and strategies that improve bank"s non interest income will help to lower the cost of borrowing.
Reservoir-engineering shortcuts to adiabaticity
Creators: name: Menu, Raphael
name: Langbehn, Josias
name: Koch, Christiane P.
name: Morigi, Giovanna
Publisher: name: Freie Universität Berlin
Year: 2022
Subjects: subject: Adiabatic quantum optimization
subject: Cavity quantum electrodynamics
subject: Quantum algorithms
subject: 500 Naturwissenschaften und Mathematik::530 Physik::530 Physik

description: We propose a protocol that achieves fast adiabatic transfer between two orthogonal states of a qubit by coupling with an ancilla. The qubit undergoes Landau-Zener dynamics, whereas the coupling realizes a time-dependent Hamiltonian, which is diagonal in the spin's instantaneous Landau-Zener eigenstates. The ancilla (or meter), in turn, couples to a thermal bath such that the overall dynamics is incoherent. We analyze the protocol's fidelity as a function of the strength of the coupling and of the relaxation rate of the meter. When the meter's decay rate is the largest frequency scale of the dynamics, the spin dynamics is encompassed by a master equation describing dephasing of the spin in the instantaneous eigenbasis. In this regime, the fidelity of adiabatic transfer improves as the bath temperature is increased. Surprisingly, the adiabatic transfer is significantly more efficient in the opposite regime, where the timescale of the ancilla dynamics is comparable to the characteristic spin timescale. Here, for low temperatures the coupling with the ancilla tends to suppress diabatic transitions via effective cooling. The protocol can be efficiently implemented by means of a pulsed, stroboscopic coupling with the ancilla and is robust against moderate fluctuations of the experimental parameters.
Martingale representation in progressive enlargement by the reference filtration of a semimartingale: a note on the multidimensional case
Creators: name: Calzolari, Antonella
name: Torti, Barbara
Publisher: name: arXiv
Year: 2016
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: Let X and Y be an m-dimensional F-semimartingale and an n-dimensional H-semimartingale respectively on the same probability space, both enjoying the strong predictable representation property. We propose a martingale representation result under the probability measure P for the square integrable G-martingales, where G is the union of F and H. As a first application we identify the biggest possible value of the multiplicity in the sense of Davis and Varaiya of the union of F1,..., Fd, where, fixed i in (1,...,d), Fi is the reference filtration of a real martingale Mi, which enjoys the Fi-predictable representation property. A second application falls into the framework of credit risk modeling and in particular into the study of the progressive enlargement of the market filtration by a default time. More precisely, when the risky asset price is a multidimensional semimartingale enjoying the strong predictable representation property and the default time satisfies the density hypothesis, we present a new proof of the analogous of the classical theorem of Kusuoka.
Nanoscale visualization of the thermally-driven evolution of antiferromagnetic domains in FeTe thin films
Creators: name: Sharma, Shrinkhala
name: Li, Hong
name: Ren, Zheng
name: Castro, Wilber Alfaro
name: Zeljkovic, Ilija
Publisher: name: arXiv
Year: 2023
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Antiferromagnetic order, being a ground state of a number of exotic quantum materials, is of immense interest both from the fundamental physics perspective and for driving potential technological applications. For a complete understanding of antiferromagnetism in materials, nanoscale visualization of antiferromagnetic domains, domain walls and their robustness to external perturbations is highly desirable. Here, we synthesize antiferromagnetic FeTe thin films using molecular beam epitaxy. We visualize local antiferromagnetic ordering and domain formation using spin-polarized scanning tunneling microscopy. From the atomically-resolved scanning tunneling microscopy topographs, we calculate local structural distortions to find a high correlation with the distribution of the antiferromagnetic order. This is consistent with the monoclinic structure in the antiferromagnetic state. Interestingly, we observe a substantial domain wall change by small temperature variations, unexpected for the low temperature changes used compared to the much higher antiferromagnetic ordering temperature of FeTe. This is in contrast to electronic nematic domains in the cousin FeSe multilayer films, where we find no electronic or structural change within the same temperature range. Our experiments provide the first atomic-scale imaging of perturbation-driven magnetic domain evolution simultaneous with the ensuing structural response of the system. The results reveal surprising thermally-driven modulations of antiferromagnetic domains in FeTe thin films well below the Neel temperature.
Law of localization in chemical reaction networks
Creators: name: Okada, Takashi
name: Mochizuki, Atsushi
Publisher: name: arXiv
Year: 2016
Subjects: subject: Molecular Networks (q-bio.MN)
subject: Dynamical Systems (math.DS)
subject: Biological Physics (physics.bio-ph)
subject: Subcellular Processes (q-bio.SC)
subject: FOS: Biological sciences
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: In living cells, chemical reactions are connected by sharing their products and substrates, and form complex networks, e.g. metabolic pathways. Here we developed a theory to predict the sensitivity, i.e. the responses of concentrations and fluxes to perturbations of enzymes, from network structure alone. Responses turn out to exhibit two characteristic patterns, $localization$ and $hierarchy$. We present a general theorem connecting sensitivity with network topology that explains these characteristic patterns. Our results imply that network topology is an origin of biological robustness. Finally, we suggest a strategy to determine real networks from experimental measurements.
description: 18 pages 5 figures; v2: minor corrections (accepted for publication in Physical Review Letters)
Multiscale simulation of transient viscoelastic free surface flows
Creators: name: Bajaj., Mohit
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.
Was die Soziale Arbeit für Menschen am Lebensende im Alters- und Pflegeheim leisten kann: Weshalb die Einbindung der Sozialen Arbeit in die Hospiz und Palliative Care von alten und hochaltrigen Menschen im Alters- und Pflegeheim einen Mehrwert bieten kann
Creators: name: Zellner, Zahra Anna
Publisher: name: Zenodo
Year: 2023

description: Aufgrund der demographischen Entwicklung wird die Soziale Arbeit mit und für alte(n) Menschen immer relevanter. Gleichwohl spielen Altersthemen in der Ausbildung Soziale Arbeit noch immer eine marginale Rolle. In der vorliegenden Arbeit «Was die Soziale Arbeit für Menschen am Lebensende im Alters- und Pflegeheim leisten kann.» befasst sich die Autorin Zahra Zellner mit dem Thema Hospiz und Palliative Care für alte und hochaltrige Menschen. Diese Bachelorarbeit ist eine Literaturarbeit. Hospiz und Palliative Care kann als Konzept und Grundhaltung in unterschiedlichen Institutionen, darunter auch in Alters- und Pflegeheimen verstanden und umgesetzt werden. Hospiz und Palliative Care hat eine ganzheitliche Ausrichtung und berücksichtigt sowohl körperliche, psychische, spirituelle wie auch soziale Aspekte. Die Aufgaben rund um die Hospiz und Palliative Care bei alten und hochaltrigen Menschen können als äusserst komplex bezeichnet werden und sind geprägt von verschiedenen Herausforderungen und Herangehensweisen. Nebst Professionellen der Pflege und der Medizin sind meist weitere Berufsfelder involviert. Auch für die Soziale Arbeit lassen sich wichtige und zentrale Aufgabenfelder ableiten, welche in vorliegender Arbeit näher betrachtet werden. Die Handlungsempfehlungen für die Praxis der Sozialen Arbeit werden dabei auf die Hospiz und Palliative Care in Alters- und Pflegeheimen eingegrenzt. Nach dieser thematischen Auseinandersetzung ist aus Sicht der Autorin eine stärkere und selbstbewusstere Positionierung der Sozialen Arbeit in der Hospiz und Palliative Care für alte und hochaltrige Menschen in Alters- und Pflegeheimen unverzichtbar.
description: + Code Diss LU: hslusa basa + Fussnote: Bachelor-Arbeit, Hochschule Luzern – Soziale Arbeit, Studienrichtung Sozialarbeit, 2023 + NL-Code: NLLUHSA202309
Fabrication and characterization of ceramic hollow shaped from the local kaolin intended for the filtration
Creators: name: Asli, Boubekeur
name: Mokhtar, Adel
name: Belouatek, Aissa
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences

description: Ceramic membranes are one of the emerging separation technologies with extremely high separation factors. In this work, natural Kaolin clay collected from the western of Algeria was characterized in detail to see its feasibility in a ceramic membrane preparation. The ceramic membrane was prepared by solid-state reactive firing under the slip casting method. The aim is to favor the mullite phase, once the alumina is added a part will be dispersed in the mullite matrix to form a mullite-alumina composite. The mineralogical, morphological structure, particle size distribution, thermal stability, and chemical composition of prepared alumina oxide membrane were carried out using several techniques. They reveal the apparition of two main phases the mullite and the alumina. The kaolin provides the membrane with a well homogeneous morphology, good hydrophobicity, and thermal stability. The obtained membrane presented a mesoporous membrane character that can use successfully for ultrafiltration applications..
Numerical homogenization of fractal interface problems
Creators: name: Kornhuber, Ralf
name: Podlesny, Joscha
name: Yserentant, Harry
Publisher: name: Freie Universität Berlin
Year: 2022
Subjects: subject: Fractal interface problems
subject: multiscale finite elements
subject: subspace decomposition
subject: Clément-type projection
subject: 500 Naturwissenschaften und Mathematik::510 Mathematik::510 Mathematik

description: We consider the numerical homogenization of a class of fractal elliptic interface problems inspired by related mechanical contact problems from the geosciences. A particular feature is that the solution space depends on the actual fractal geometry. Our main results concern the construction of projection operators with suitable stability and approximation properties. The existence of such projections then allows for the application of existing concepts from localized orthogonal decomposition (LOD) and successive subspace correction to construct first multiscale discretizations and iterative algebraic solvers with scale-independent convergence behavior for this class of problems.
Enhancing cancer patient's well-being and health status improvement following treatment using AI methods - project ONCORELIEF
Creators: name: Venios, Stefanos
name: Koussouris, Sotiris
name: Scherrer, Alexander
name: Likothanassis, Spyridon
name: Mousa, Fihmi
name: Diamantopoulos, Sotiris
name: Plakia, Maria
Publisher: name: Zenodo
Year: 2021

description: ONCORELIEF improves post-treatment health status, well-being and follow-up care for cancer patients in order to meet their needs and allow for timely suggestions before these patients face increased therapeutic side-effects, emotional distress, or biobehavioural factors promoting cancer progression.
Consistent thermodynamics and topological classes for the four-dimensional Lorentzian charged Taub-NUT spacetimes
Creators: name: Wu, Di
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper, we derive the consistent thermodynamics of the four-dimensional Lorentzian charged Reissner-Nordström-NUT (RN-NUT), Kerr-Newman-NUT (KN-NUT), and RN-NUT-AdS spacetimes in the framework of the ($ψ-\mathcal{N}$)-pair formalism, and then investigate their topological numbers by using the uniformly modified form of the generalized off-shell Helmholtz free energy. We find that these solutions can be included into one of three categories of those well-known black hole solutions, which implies that these spacetimes should be viewed as generic black holes from the perspective of the topological thermodynamic defects. In addition, we demonstrate that although the existence of the NUT charge parameter seems to have no impact on the topological number of the charged asymptotically locally flat spacetimes, it has a remarkable effect on the topological number of the charged asymptotically locally AdS spacetime.
description: 11 pages, 6 figures, 1 table, revtex-4-1.cls, to appear in EPJC
Investigation of the high-spin rotational properties of the proton emitter $^{113}$Cs using a particle-number conserving method
Creators: name: Zhang, Zhen-Hua
name: Xu, Peng
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The recently observed two high-spin rotational bands in the proton emitter $^{113}$Cs are investigated using the cranked shell model with pairing correlations treated by a particle-number conserving method, in which the Pauli blocking effects are taken into account exactly. By using the configuration assignments of band 1 ($π3/2^+[422], α= -1/2$) and band 2 ($π1/2^+[420], α= 1/2$), the experimental moments of inertia and quasiparticle alignments can be well reproduced by the present calculations, which in turn strongly support these configuration assignments. Furthermore, by analyzing the occupation probability $n_μ$ of each cranked Nilsson level near the Fermi surface and the contribution of each orbital to the angular momentum alignments, the backbending mechanism of these two bands is also investigated.
description: 7 pages, 5 figures. arXiv admin note: text overlap with arXiv:1608.07669, arXiv:1606.00573, arXiv:1606.00570
Spin fluctuations and high-temperature superconductivity in cuprates
Creators: name: Plakida, Nikolay M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: To describe the cuprate superconductors, models of strongly correlated electronic systems, such as the Hubbard or t-J models, are commonly employed. To study these models, projected (Hubbard) operators have to be used. Due to the unconventional commutation relations for the Hubbard operators, a specific kinematical interaction of electrons with spin and charge fluctuations emerges. The interaction is induced by the intraband hopping with a coupling parameter of the order of the kinetic energy of electrons W which is much larger than the antiferromagnetic exchange interaction J induced by the interband hopping. This review presents a consistent microscopic theory of spin excitations and superconductivity for cuprates where these interactions are taken into account within the Hubbard operator technique. The low-energy spin excitations are considered for the t-J model, while the electronic properties are studied using the two-subband extended Hubbard model where the intersite Coulomb repulsion V and electron-phonon interaction are taken into account.
description: 26 pages, 33 figures, 130 references. arXiv admin note: text overlap with arXiv:1301.4347, arXiv:1402.4934
An effective preconditioning strategy for volume penalized incompressible/low Mach multiphase flow solvers
Creators: name: Thirumalaisamy, Ramakrishnan
name: Khedkar, Kaustubh
name: Ghysels, Pieter
name: Bhalla, Amneet Pal Singh
Publisher: name: arXiv
Year: 2023
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Numerical Analysis (math.NA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: The volume penalization (VP) or the Brinkman penalization (BP) method is a diffuse interface method for simulating multiphase fluid-structure interaction (FSI) problems in ocean engineering and/or phase change problems in thermal sciences. The method relies on a penalty factor (which is inversely related to body's permeability $κ$) that must be large to enforce rigid body velocity in the solid domain. When the penalty factor is large, the discrete system of equations becomes stiff and difficult to solve numerically. In this paper, we propose a projection method-based preconditioning strategy for solving volume penalized (VP) incompressible and low-Mach Navier-Stokes equations. The projection preconditioner enables the monolithic solution of the coupled velocity-pressure system in both single phase and multiphase flow settings. In this approach, the penalty force is treated implicitly, which is allowed to take arbitrary large values without affecting the solver's convergence rate or causing numerical stiffness/instability. It is made possible by including the penalty term in the pressure Poisson equation. Solver scalability under grid refinement is demonstrated. A manufactured solution in a single phase setting is used to determine the spatial accuracy of the penalized solution. Second-order pointwise accuracy is achieved for both velocity and pressure solutions. Two multiphase fluid-structure interaction (FSI) problems from the ocean engineering literature are also simulated to evaluate the solver's robustness and performance. The proposed solver allows us to investigate the effect of $κ$ on the motion of the contact line over the surface of the immersed body. It also allows us to investigate the dynamics of the free surface of a solidifying metal
Modelling Inflation with a Power-law Approach to the Inflationary Plateau
Creators: name: Dimopoulos, Konstantinos
name: Owen, Charlotte
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A new family of inflationary models is introduced and analysed. The behaviour of the parameters characterising the models suggest preferred values, which generate the most interesting testable predictions. Results are further improved if late reheating and/or a subsequent period of thermal inflation is taken into account. Specific model realisations consider a sub-Planckian inflaton variation or a potential without fine-tuning of mass scales, based on the Planck and grand unified theory scales. A toy model realisation in the context of global and local supersymmetry is examined and results fitting the Planck observations are determined.
description: 14 pages, 5 figures
Using Machine Learning Methods and Electronic Health Records to Classify Patients as At-Risk for Opioid Abuse and Dependence
Creators: name: Deaver, Julia
name: Burek, Julia
name: Heman Shakeri
Publisher: name: Zenodo
Year: 2023
Subjects: UVA MSDS 2023

description: The goal of this research was to create a predictive algorithm that classifies some patients as high-risk for misuse of opioids. Opioids are often prescribed for pain relief, but can be highly addictive and lead to misuse among patients. Utilizing patient data from All of Us Research Hub, an electronic health record database, machine learning methods were applied to determine which patients were at high-risk for opioid misuse and those that were not. The models described in this paper use a patient’s drug prescription, procedures, chronic diseases, and pain history to classify whether or not a person is more likely to abuse or become dependent on opioids. The motivation for this research was to build an algorithm that medical professionals could use before prescribing a patient opioids, allowing them to consider alternative treatments if a patient is identified as at-risk for misuse. In this paper, we describe our methodology in creating a logistic regression model, decision tree, random forest, and deep learning neural network to predict a patient’s risk of opioid abuse or dependence. We were able to determine what factors impact a patient’s risk of opioid misuse the most, which were supported by prior literature review. This work demonstrates how machine learning methods such as deep learning are an important strategy when dealing with major healthcare issues such as the opioid epidemic.
Super-Resolution Radar Imaging with Sparse Arrays Using a Deep Neural Network Trained with Enhanced Virtual Data
Creators: name: Schuessler, Christian
name: Hoffmann, Marcel
name: Vossiek, Martin
Publisher: name: arXiv
Year: 2023
Subjects: subject: Signal Processing (eess.SP)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Robotics (cs.RO)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: This paper introduces a method based on a deep neural network (DNN) that is perfectly capable of processing radar data from extremely thinned radar apertures. The proposed DNN processing can provide both aliasing-free radar imaging and super-resolution. The results are validated by measuring the detection performance on realistic simulation data and by evaluating the Point-Spread-function (PSF) and the target-separation performance on measured point-like targets. Also, a qualitative evaluation of a typical automotive scene is conducted. It is shown that this approach can outperform state-of-the-art subspace algorithms and also other existing machine learning solutions. The presented results suggest that machine learning approaches trained with sufficiently sophisticated virtual input data are a very promising alternative to compressed sensing and subspace approaches in radar signal processing. The key to this performance is that the DNN is trained using realistic simulation data that perfectly mimic a given sparse antenna radar array hardware as the input. As ground truth, ultra-high resolution data from an enhanced virtual radar are simulated. Contrary to other work, the DNN utilizes the complete radar cube and not only the antenna channel information at certain range-Doppler detections. After training, the proposed DNN is capable of sidelobe- and ambiguity-free imaging. It simultaneously delivers nearly the same resolution and image quality as would be achieved with a fully occupied array.
description: 15 pages, 12 figures, Accepted to IEEE Journal of Microwaves
Microscopic Understanding of Reaction Rates Observed in Plasmon Chemistry of Nanoparticle–Ligand Systems
Creators: name: Schürmann, Robin
name: Nagel, Alessandro
name: Juergensen, Sabrina
name: Pathak, Anisha
name: Reich, Stephanie
name: Pacholski, Claudia
name: Bald, Ilko
Publisher: name: Freie Universität Berlin
Year: 2022
Subjects: subject: Metal nanoparticles
subject: Monolayers
subject: Order
subject: Quantum mechanics
subject: Raman spectroscopy
subject: 500 Naturwissenschaften und Mathematik::540 Chemie::540 Chemie und zugeordnete Wissenschaften

description: Surface-enhanced Raman scattering (SERS) is an effective and widely used technique to study chemical reactions induced or catalyzed by plasmonic substrates, since the experimental setup allows us to trigger and track the reaction simultaneously and identify the products. However, on substrates with plasmonic hotspots, the total signal mainly originates from these nanoscopic volumes with high reactivity and the information about the overall consumption remains obscure in SERS measurements. This has important implications; for example, the apparent reaction order in SERS measurements does not correlate with the real reaction order, whereas the apparent reaction rates are proportional to the real reaction rates as demonstrated by finite-difference time-domain (FDTD) simulations. We determined the electric field enhancement distribution of a gold nanoparticle (AuNP) monolayer and calculated the SERS intensities in light-driven reactions in an adsorbed self-assembled molecular monolayer on the AuNP surface. Accordingly, even if a high conversion is observed in SERS due to the high reactivity in the hotspots, most of the adsorbed molecules on the AuNP surface remain unreacted. The theoretical findings are compared with the hot-electron-induced dehalogenation of 4-bromothiophenol, indicating a time dependency of the hot-carrier concentration in plasmon-mediated reactions. To fit the kinetics of plasmon-mediated reactions in plasmonic hotspots, fractal-like kinetics are well suited to account for the inhomogeneity of reactive sites on the substrates, whereas also modified standard kinetics model allows equally well fits. The outcomes of this study are on the one hand essential to derive a mechanistic understanding of reactions on plasmonic substrates by SERS measurements and on the other hand to drive plasmonic reactions with high local precision and facilitate the engineering of chemistry on a nanoscale.
Boundedness in $L_p$ spaces for the Hartley-Fourier convolutions operator and their applications
Creators: name: Tuan, Trinh
Publisher: name: arXiv
Year: 2023
Subjects: subject: Functional Analysis (math.FA)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 42A38. 44A35. 45E10. 45J05. 26D10

description: The paper deals with $L_p$-boundedness of the Hartley-Fourier convolutions operator and their applied aspects. We establish various new Young-type inequalities and obtain the structure of a normed ring in Banach space when equipping it with such convolutional multiplication. Weighted $L_p$-norm inequalities of these convolutions are also considered. As applications, we investigate the solvability and the bounded $L_1$-solution of a class of Fredholm-type integral equations and linear Barbashin's equations with the help of factorization identities of such convolutions. Several examples are provided to illustrate the obtained results to ensure their validity and applicability.
description: 16 pages, to appear in J. Math. Sci
Limits on Lorentz invariance violation at the Planck energy scale from H.E.S.S. spectral analysis of the blazar Mrk 501
Creators: name: Lorentz, Matthias
name: Brun, Pierre
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Some extensions to the Standard Model lead to the introduction of Lorentz symmetry breaking terms, expected to induce deviations from Lorentz symmetry around the Planck scale. A parameterization of effects due to Lorentz invariance violation (LIV) can be introduced by adding an effective term to the photon dispersion relation. This affects the kinematics of electron-positron pair creation by TeV $γ$ rays on the extragalactic background light (EBL) and translates into modifications of the standard EBL opacity for the TeV photon spectra of extragalactic sources. Exclusion limits are presented, obtained with the spectral analysis of H.E.S.S. observations taken on the blazar Mrk 501 during the exceptional 2014 flare. The energy spectrum, extending very significantly above 10 TeV, allows to place strong limits on LIV in the photon sector at the level of the Planck energy scale for linear perturbations in the photon dispersion relation, and provides the strongest constraints presently for the case of quadratic perturbations.
description: To appear in proceedings of the 6th Roma International Conference on Astro-Particle Physics (RICAP 16)
Loan Repayment and its Determinants in Small Scale Enterprises Financing in Ethiopia: Case of Private Borrowers Around Zeway Area
Creators: name: Gebeyehu, Abreham
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2002

description: One of the most crucial and leading factors constraining Small Scale Enterprises (SSEs) development in developing countries like Ethiopia is limited access to financial capital and credit especially from the formal lending agents. This is because on the one hand, these enterprises couldn't fulfill the bank's lending requirements and on the other, the banking sector considers these enterprises as involving high credit risk. This study is conducted with the aim of identifying the major factors behind the loan default problem of SSEs with particular reference to Development Bank of Ethiopia (DBE). In an attempt to analyze the determinants of loan repayment status of borrowers and to identify the criteria employed to ration credit two equations-loan repayment and rationing equations were estimated using survey data. The estimation result employing tobit model reveals that having other source of income, education, work experience in related economic activity before the loan and engaging on economic activities other than agriculture are enhancing while loan diversion, being male borrower and giving extended loan repayment period are undermining factors of the loan recovery performance of projects. With regards to the loan rationing mechanism, it is found that borrowers who secured high value of collateral and those with relatively longer repayment period were favored although they tend to be more risky while those with higher equity share and extensive experience in related activity were disfavored. This leads to the conclusion that the bank's rationing mechanism didn't much with the repayment behavior of borrower. The result leads to the suggestion that, the bank's rationing technology should be revised in such a way that Small Scale Entrepreneurs who have the managerial and entrepreneurship capacity but don't have sufficient credit access due to stringent collateral requirement could make use of the financial resource of the country and thereby contribute towards the envisaged development target as well as the bank to get out of the loan default problem
Geostatistical analysis of municipal solid waste settlement, stiffness and unit weight
Creators: name: Avsar., Mehmet Sina
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.
N=4, d=3 Born-Infeld theory in component approach
Creators: name: Kozyrev, Nikolay
name: Krivonos, Sergey
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Using the formalism of nonlinear realizations we construct the component on-shell action of the N=4,d=3 Born-Infeld theory, which is the action of N=2, d=3 vector supermultiplet, fixed by invariance with respect to the additional spontaneously broken N=2, d=3 supersymmetry. Our construction shows that dealing with the systems with partial breaking of supersymmetry with vector fields in the multiplet, it is preferrable to use their formulation in terms of fermionic superfields only.
description: 10 pages. Based on talk given by N. K. on International Conference on Integrable Systems and Quantum Symmetries (ISQS24). Version to appear in ISQS24 proceedings
Determinants of Ethiopian Foreign Direct Investment Inflows: Bounds Testing Approach
Creators: name: Tamirat, Hailu
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2019

description: The very purpose of this research paper is to investigate the long run relationship between foreign direct investment (FDI) and its determinants in Ethiopia. Accordingly, bounds testing approach to Auto Regressive Distributed Lag (ARDL) model has been utilized to test co-integrations among the variables of interests in Ethiopia for the period 1992-2017. Taking foreign direct investment as a dependent variable and real GDP per capita, consumer price index, exchange rate, public debt, gross fixed capital formation and human capital as independent variables, co-integration test has been conducted. The result confirm long run association among these variables. Subsequently, from the long run estimation result output, real GDP per capita as a proxy for market size, gross fixed capital formation as measure of infrastructure development and exchange rate depreciation have positive significant effect on foreign direct investment inflows; but negative and significant effect of consumer price index on foreign direct investment inflows to Ethiopia have been found in the long run. The short run relationship and error correction model (ECM) result reveals positive and significant impact of consumer price index and gross fixed capital formation on FDI inflows. Exchange rate is affecting FDI inflows negatively in the short run as it is shown by the study. The policy of promoting the economy through creating enabling investment climate to increase the output of the economy, maintaining macroeconomic stability, ensuring market determined exchange rate and developing the infrastructure to increase FDI inflows have been recommended.
Sequential Manipulation Planning for Over-actuated Unmanned Aerial Manipulators
Creators: name: Su, Yao
name: Li, Jiarui
name: Jiao, Ziyuan
name: Wang, Meng
name: Chu, Chi
name: Li, Hang
name: Zhu, Yixin
name: Liu, Hangxin
Publisher: name: arXiv
Year: 2023
Subjects: subject: Robotics (cs.RO)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: We investigate the sequential manipulation planning problem for unmanned aerial manipulators (UAMs). Unlike prior work that primarily focuses on one-step manipulation tasks, sequential manipulations require coordinated motions of a UAM's floating base, the manipulator, and the object being manipulated, entailing a unified kinematics and dynamics model for motion planning under designated constraints. By leveraging a virtual kinematic chain (VKC)-based motion planning framework that consolidates components' kinematics into one chain, the sequential manipulation task of a UAM can be planned as a whole, yielding more coordinated motions. Integrating the kinematics and dynamics models with a hierarchical control framework, we demonstrate, for the first time, an over-actuated UAM achieves a series of new sequential manipulation capabilities in both simulation and experiment.
Charge specific baryon mass relations with deformed SU_q(3) flavor symmetry
Creators: name: Gresnigt, Niels G.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The quantum group $SU_q(3)=U_q(su(3))$ is taken as a baryon flavor symmetry. Accounting for electromagnetic contributions to baryons masses to zeroth order, new charge specific $q$-deformed octet and decuplet baryon mass formulas are obtained. These new mass relations have errors of only 0.02\% and 0.08\% respectively; a factor of 20 reduction compared to the standard Gell-Mann-Okubo mass formulas. A new relation between the octet and decuplet baryon masses that is accurate to 1.2\% is derived. An explicit formula for the Cabibbo angle, taken to be $\fracπ{14}$, in terms of the deformation parameter $q$ and spin parity $J^P$ of the baryons is obtained.
description: 14 pages
Second Order RG Flow in General su(2) Coset Models
Creators: name: Stanishkov, Marian
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider a RG flow in a general su(2) coset model perturbed by the least relevant field. The perturbing field as well as some particular fields of dimension close to one are constructed recursively in terms of lower level fields. Using this construction we obtain the structure constants and the four-point correlation functions in the leading order. This allows us to compute the mixing coefficients among the fields in the UV and the IR theory. It turns out that they are in agreement with those found recently using the domain wall construction up to this order.
description: 29 pages, references added. arXiv admin note: text overlap with arXiv:1404.7628
Stress wave propagation from the impact of plane bar frames
Creators: name: Atkins., Kenneth John
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.
Lateglacial And Early Holocene Environments And Human Occupation In Brandenburg, Eastern Germany
Creators: name: Kobe, Franziska
name: Bittner, Martin K.
name: Leipe, Christian
name: Hoelzmann, Philipp
name: Long, Tengwen
name: Wagner, Mayke
name: Zibulski, Romy
name: Tarasov, Pavel E.
Publisher: name: Freie Universität Berlin
Year: 2022
Subjects: subject: pollen analysis
subject: plant macrofossils
subject: sediment geochemistry
subject: AMS 14C dating
subject: vegetation
subject: climate change
subject: 500 Naturwissenschaften und Mathematik::560 Fossilien, Paläontologie::561 Paläobotanik, fossile Mikroorganismen

description: The paper reports on the results of the pollen, plant macrofossil and geochemical analyses and the AMS 14C-based chronology of the «Rüdersdorf» outcrop situated east of Berlin in Brandenburg (Germany). The postglacial landscape changed from an open one to generally forested by ca. 14 cal. kyr BP. Woody plants (mainly birch and pine) contributed up to 85% to the pollen assemblages ca. 13.4–12.5 cal. kyr BP. The subsequent Younger Dryas ( YD) interval is characterized by a decrease in arboreal pollen (AP) to 75% but led neither to substantial deforestation nor spread of tundra vegetation. This supports the concept that the YD cooling was mainly limited to the winter months, while summers remained comparably warm and allowed much broader (than initially believed) spread of cold-tolerant boreal trees. Further support for this theory comes from the fact that the relatively low AP values persisted until ca. 10.6 cal. kyr BP, when the «hazel phase» of the regional vegetation succession began. The postglacial hunter-gatherer occupation is archaeologically confirmed in Brandenburg since ca. 13 cal. kyr BP, i.e. much later than in the western part of Germany and ca. 1000 years after the major amelioration in the Rüdersdorf environmental record.