cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Determinants of Aviation Profitability: the Case of Ethiopian Airlines
Creators: name: Abebe, Gebeyehu
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2017

description: In order to be competitive, profitability of a firm plays an undeniable role and investigation of the factors determining profitability of a firm would provide useful insights. Therefore, the main purpose of the study is to show factors that determine Ethiopian Airlines profitability. The dependent variable profit was regressed against growth, liquidity, leverage, tangibility of asset, lease and fuel cost, to show which factor determine Ethiopian profitability. The study used explanatory research design and multiple regression model is used to show the impact of the independent variables on the dependent variable. The study used quantitative and qualitative data, obtained from secondary source from 1981-2015.The data was analyzed using time series econometrics methodology. The analysis is done by using E-view 8. The result revealed that fuel cost, liquidity and leverages are statically significant to explain the dependent variable. Besides, tangibility of asset, lease cost and leverage ratios have negatively correlated with Ethiopian airlines profitability. Finally, it is recommended that the airline should have more concern to liquidity, fuel and leverage than growth and tangibility of asset. Keywords: Ethiopian airlines, Profitability, internal factors, financial statement. Determinants of Ethiopian Airlines profitability
Brief description of the flavor-changing neutral scalar interactions at two-loop level
Creators: name: Gaitán, R.
name: Orduz-Ducuara, J. A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this letter we show a general description about flavor-changing neutral currents (FCNC) mediated by scalars. The analysis is extended at two-loop level for the Two-Higgs Doublet Model type-III because others models have strong constraints on its parameters, even at high orders of the perturbation. For this letter we focus on the standard model, calculating the amplitude for the $h \to γγ$ process and discussing the results briefly.
description: 6 pages, 2 figures, To be published in Journal of Physics Conference Series (IOP). Joint Proceedings of the XV Mexican Workshop on Particles and Fields & the XXX Annual Meeting of the Division of Particles and Fields of the Mexican Physical Society
Adjusting the Ground Truth Annotations for Connectivity-Based Learning to Delineate
Creators: name: Oner, Doruk
name: Citraro, Leonardo
name: Koziński, Mateusz
name: Fua, Pascal
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Deep learning-based approaches to delineating 3D structure depend on accurate annotations to train the networks. Yet, in practice, people, no matter how conscientious, have trouble precisely delineating in 3D and on a large scale, in part because the data is often hard to interpret visually and in part because the 3D interfaces are awkward to use. In this paper, we introduce a method that explicitly accounts for annotation inaccuracies. To this end, we treat the annotations as active contour models that can deform themselves while preserving their topology. This enables us to jointly train the network and correct potential errors in the original annotations. The result is an approach that boosts performance of deep networks trained with potentially inaccurate annotations. Code has been released at https://github.com/doruk-oner/AdjustingAnnotationswithSnakes.
Muon spin rotation and infrared spectroscopy study of magnetism and superconductivity in Ba$ _{1-x} $K$ _{x} $Fe$ _{2} $As$ _{2} $
Creators: name: Mallett, B. P. P.
name: Wang, C. N.
name: Marsik, P.
name: Sheveleva, E.
name: Yazdi-Rizi, M.
name: Tallon, J. L.
name: Adelmann, P.
name: Wolf, Th
name: Bernhard, C.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Using muon spin rotation and infrared spectroscopy we study the relation between magnetism and superconductivity in Ba$ _{1-x} $K$ _{x} $Fe$ _{2} $As$ _{2} $ single crystals from the underdoped to the slightly overdoped regime. We find that the Fe magnetic moment is only moderately suppressed in most of the underdoped region where it decreases more slowly than the Néel-temperature, $ T^{\mathrm{N}} $. This applies for both the total Fe moment obtained from muon spin rotation and for the itinerant component that is deduced from the spectral weight of the spin-density-wave pair breaking peak in the infrared response. In the moderately underdoped region, superconducting and static magnetic orders co-exist on the nano-scale and compete for the same electronic states. The static magnetic moment disappears rather sharply near optimal doping, however, in the slightly overdoped region there is still an enhancement or slowing down of spin fluctuations in the superconducting state. Similar to the gap magnitude reported from specific heat measurements, the superconducting condensate density is nearly constant in the optimally- and slightly overdoped region, but exhibits a rather pronounced decrease on the underdoped side. Several of these observations are similar to the phenomenology in the electron doped counterpart Ba(Fe$ _{1-y} $Co$ _{y} $)$ _{2} $As$ _{2} $.
description: 14 pages, 10 figures
A review of diaphragmless shock tubes for interdisciplinary applications
Creators: name: Janardhanraj, S.
name: Karthick, S. K.
name: Farooq, A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: Shock tubes have emerged as an effective tool for applications in various fields of research and technology. The conventional mode of shock tube operation employs a frangible diaphragm to generate shockwaves. The last half-century has witnessed significant efforts to replace this diaphragm-bursting method with fast-acting valves. These diaphragmless methods have good repeatability, quick turnaround time between experiments, and produce a clean flow, free of diaphragm fragments in contrast to the conventional diaphragm-type operation. The constantly evolving valve designs are targeting shorter opening times for improved performance and efficiency. The present review is a compilation of the different diaphragmless shock tubes that have been conceptualized, developed, and implemented for various research endeavors. The discussions focus on essential factors, including the type of actuation mechanism, driver-driven configurations, valve opening time, shock formation distance, and operating pressure range, that ultimately influence the shockwave parameters obtained in the shock tube. A generalized mathematical model to study the behavior of these valves is developed. The advantages, limitations, and challenges in improving the performance of the valves are described. Finally, the present-day applications of diaphragmless shock tubes have been discussed, and their potential scope in expanding the frontiers of shockwave research and technology are presented.
description: Review paper, 36 pages, 26 figures, manuscript draft
Detection of Faults in Power System Using Wavelet Transform and Independent Component Analysis
Creators: name: Ray, P. K.
name: Panigrahi, B. K.
name: Rout, P. K.
name: Mohanty, A.
name: Dubey, H.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Uninterruptible power supply is the main motive of power utility companies that motivate them for identifying and locating the different types of faults as quickly as possible to protect the power system prevent complete power black outs using intelligent techniques. Thus, the present research work presents a novel method for detection of fault disturbances based on Wavelet Transform (WT) and Independent Component Analysis (ICA). The voltage signal is taken offline under fault conditions and is being processed through wavelet and ICA for detection. The time-frequency resolution from WT transform detects the fault initiation instant in the signal. Again, a performance index is calculated from independent component analysis under fault condition which is used to detect the fault disturbance in the voltage signal. The proposed approach is tested to be robust enough under various operating scenarios like without noise, with 20-dB noise and variation in frequency. Further, the detection study is carried out using a performance index, energy content, by applying the existing Fourier transform (FT), short time Fourier transform (STFT) and the proposed wavelet transform. Fault disturbances are detected if the energy calculated in each scenario is greater than the corresponding threshold value. The fault detection study is simulated in MATLAB/Simulink for a typical power system.
description: 5 pages, 6 figures, Table 1
Galaxy blending effects in deep imaging cosmic shear probes of cosmology
Creators: name: Nourbakhsh, Erfan
name: Tyson, J. Anthony
name: Schmidt, Samuel J.
name: Collaboration, The LSST Dark Energy Science
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Upcoming deep imaging surveys such as the Vera C. Rubin Observatory Legacy Survey of Space and Time will be confronted with challenges that come with increased depth. One of the leading systematic errors in deep surveys is the blending of objects due to higher surface density in the more crowded images; a considerable fraction of the galaxies which we hope to use for cosmology analyses will overlap each other on the observed sky. In order to investigate these challenges, we emulate blending in a mock catalogue consisting of galaxies at a depth equivalent to 1.3 yr of the full 10-yr Rubin Observatory that includes effects due to weak lensing, ground-based seeing, and the uncertainties due to extraction of catalogues from imaging data. The emulated catalogue indicates that approximately 12 per cent of the observed galaxies are ``unrecognized'' blends that contain two or more objects but are detected as one. Using the positions and shears of half a billion distant galaxies, we compute shear--shear correlation functions after selecting tomographic samples in terms of both spectroscopic and photometric redshift bins. We examine the sensitivity of the cosmological parameter estimation to unrecognized blending employing both jackknife and analytical Gaussian covariance estimators. An $\sim0.025$ decrease in the derived structure growth parameter $S_8 = σ_8 (Ω_{\rm m}/0.3)^{0.5}$ is seen due to unrecognized blending in both tomographies with a slight additional bias for the photo-$z$-based tomography. This bias is greater than the $2σ$ statistical error in measuring $S_8$.
description: Published version with a typo fixed
Dynamical decoherence of the light induced interlayer coupling in YBa$_{2}$Cu$_{3}$O$_{6+δ}$
Creators: name: Hunt, C. R.
name: Nicoletti, D.
name: Kaiser, S.
name: Pröpper, D.
name: Loew, T.
name: Porras, J.
name: Keimer, B.
name: Cavalleri, A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Optical excitation of apical oxygen vibrations in YBa$_{2}$Cu$_{3}$O$_{6+δ}$ has been shown to enhance its c-axis superconducting-phase rigidity, as evidenced by a transient blue shift of the equilibrium inter-bilayer Josephson plasma resonance. Surprisingly, a transient c-axis plasma mode could also be induced above T$_{c}$ by the same apical oxygen excitation, suggesting light activated superfluid tunneling throughout the pseudogap phase of YBa$_{2}$Cu$_{3}$O$_{6+δ}$. However, despite the similarities between the above T$_{c}$ transient plasma mode and the equilibrium Josephson plasmon, alternative explanations involving high mobility quasiparticle transport should be considered. Here, we report an extensive study of the relaxation of the light-induced plasmon into the equilibrium incoherent phase. These new experiments allow for a critical assessment of the nature of this mode. We determine that the transient plasma relaxes through a collapse of its coherence length rather than its carrier (or superfluid) density. These observations are not easily reconciled with quasiparticle interlayer transport, and rather support transient superfluid tunneling as the origin of the light-induced interlayer coupling in YBa$_{2}$Cu$_{3}$O$_{6+δ}$.
description: 27 pages (17 pages main text, 10 pages supplementary), 5 figures (main text)
Looking at Mirror Images: The Korean Plight to Find its Place in a New World
Creators: name: Uk, Ko Hae
Publisher: name: University of Chicago
Year: 2022
Subjects: subject: Korean History
subject: Role Model
subject: Model
subject: Emulation
subject: Self Image
subject: Heuristics
subject: History of Perception
subject: History of Empire
subject: International History
subject: Transnational History
subject: Belgian History
subject: Irish History
subject: Japanese History
subject: Choson
subject: Taehan Jeguk
subject: International Law
subject: Neutrality
subject: International Relations
subject: Treaty
subject: Global Order
subject: Imperial World Order
subject: Sino-sphere
subject: Colonization
subject: Sovereignty
subject: Internationalist Aspirations

description: “Looking at Mirror Images” departs from the practice of studying Korea’s relationship with China, its past suzerain Japan, its colonizer; and America, the leader of the alliance; and analyzes Korea’s imitation of Belgium and perception of Ireland to understand its struggle against colonization. “Looking at Mirror Images” first seeks to explain how Koreans came to emulate Belgium when they were forcibly incorporated into an imperial world order. Korean leaders’ attempt to harness international law to pursue a Belgian model of neutrality was eventually futile. Once colonized, both Koreans and Japanese looked at different phases of British Ireland as role models that Korea should aim to become like. An analysis of the Korean project of emulating Belgian neutrality prior to colonization and Korean perception of Ireland after colonization, will offer insights into Korea's unsuccessful struggle to maintain sovereignty.
Relativistic orbits around spinning supermassive black holes. Secular evolution to 4.5 post-Newtonian order
Creators: name: Will, Clifford M.
name: Maitra, Matthew
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We derive the secular evolution of the orbital elements of a stellar-mass object orbiting a spinning massive black hole. We use the post-Newtonian approximation in harmonic coordinates, with test-body equations of motion for the conservative dynamics that are valid through 3PN order, including spin-orbit, quadrupole and (spin)$^2$ effects, and with radiation-reaction contributions linear in the mass of the body that are valid through 4.5PN order, including the 4PN damping effects of spin-orbit coupling. The evolution equations for the osculating orbit elements are iterated to high PN orders using a two-timescale approach and averaging over orbital timescales. We derive a criterion for terminating the orbit when its Carter constant drops below a critical value, whereupon the body plunges across the event horizon at the next closest approach. The results are valid for arbitrary eccentricities and arbitrary inclinations. We then analyze numerically the orbits of objects injected into high-eccentricity orbits via interactions within a surrounding star cluster, obtaining the number of orbits and the elapsed time between injection and plunge, and the residual orbital eccentricity at plunge as a function of inclination. We derive an analytic approximation for the time to plunge in terms of initial orbital variables. We show that, if the black hole is spinning rapidly, the flux of gravitational radiation during the final orbit before plunge may be suppressed by as much as three orders of magnitude if the orbit is retrograde on the equatorial plane compared to its prograde counterpart.
description: 28 pages, 6 figures, to be submitted to the Physical Review
Notes on Atkin-Lehner theory for Drinfeld modular forms
Creators: name: Dalal, Tarun
name: Kumar, Narasimha
Publisher: name: arXiv
Year: 2021
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: Primary 11F52, 11F25, Secondary 12J25, 11G09

description: In this article, we settle a part of the Conjecture by Bandini and Valentino (\cite{BV19a}) for $S_{k,l}(Γ_0(T))$ when $\mathrm{dim}\ S_{k,l}(\mathrm{GL}_2(A))\leq 2$. Then, we frame this conjecture for prime, higher levels, and provide some evidence in favour of it. For any square-free level $\mathfrak{n}$, we define oldforms $S_{k,l}^{\mathrm{old}}(Γ_0(\mathfrak{n}))$, newforms $S_{k,l}^{\mathrm{new}}(Γ_0(\mathfrak{n}))$, and investigate their properties. These properties depend on the commutativity of the (partial) Atkin-Lehner operators with the $U_\mathfrak{p}$-operators. Finally, we show that the set of all $U_\mathfrak{p}$-operators are simultaneously diagonalizable on $S_{k,l}^{\mathrm{new}}(Γ_0(\mathfrak{n}))$.
Prospects for measuring the longitudinal particle distribution of cosmic-ray air showers with SKA
Creators: name: Corstanje, A.
name: Buitink, S.
name: Bhavani, J.
name: Desmet, M.
name: Falcke, H.
name: Hare, B. M.
name: Hörandel, J. R.
name: Huege, T.
name: Karasthatis, N.
name: Krampah, G. K.
name: Mitra, P.
name: Mulrey, K.
name: Nelles, Anna Friederike
name: Nivedita, K.
name: Pandya, H.
name: Rachen, J. P.
name: Scholten, O.
name: Thoudam, S.
name: Trinh, G.
name: ter Veen, S.
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2023
Subjects: showers, atmosphere
interaction, model
longitudinal
air
noise
accelerator
density
energy levels
cosmic radiation
mass spectrum
resolution

description: We explore the possibilities of measuring the longitudinal profile of individual air showers beyond $X_{\rm max}$ when using very dense radio arrays such as SKA. The low-frequency part of the Square Kilometre Array, to be built in Australia, features an enormous antenna density of about $50,000$ antennas in the inner core region of radius 500 m, with a frequency band from 50 to 350 MHz. From CoREAS simulations, a SKA-Low antenna model plus noise contributions, and adapted LOFAR analysis scripts, we obtain a resolution in the shower maximum $X_{\rm max}$ and energy that is considerably better than at LOFAR. Already from this setup, we show that at least one additional parameter of the longitudinal profile can be measured. This would improve mass composition analysis by measuring an additional composition-dependent quantity. Moreover, it would offer an opportunity to discriminate between the different predictions of hadronic interaction models, hence contributing to hadronic physics at energy levels beyond man-made accelerators.
Identification of linear dynamic systems using minimum variance and optimal instrumental variable methods
Creators: name: Yamashita, Katsuhiko.
Publisher: name: Monash University
Year: 2022

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.
Budgeting and Budget Monitoring Practice in NGOs Operating in Ethiopia
Creators: name: Ahmed, Yesuf
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2015

description: Budgeting is about making plans for the future, implementing those plans and monitoring activities to see whether they conform to the plan. The purpose of this study is to evaluate the effect of budgeting and budget monitoring practice in NGOs operating in Ethiopia. The study focused on budget development, monitoring and implementation activities undertaken during the project cycle periods. To achieve the objectives of the thesis, convenience sampling method was used and selected twenty charity organizations. Managers of the sample organizations were communicated to identify the key staffs that are responsible in the budgeting process according to the structure of each organization. 81 staffs are taken as respondents from Program, Finance and support service departments of the organizations out of 102 staffs who were recommended by the organizations managers. A self-administered questionnaire was distributed to respondents. Secondary data was also collected from budget performance reports, financial statements and manuals. As the findings show, the overall budgeting system in the sample organizations missed the participation of concerned staffs. Participation of staffs in budget development helps to achieve the purposes of budget such as coordination, communication and motivation in the process of achieving the expected performance level. So it is recommended that the charities should participate concerned staffs in budget development, budget monitoring and implementation. Key words: Budget preparation, budget monitoring and Budget implementation
InDuDoNet+: A Deep Unfolding Dual Domain Network for Metal Artifact Reduction in CT Images
Creators: name: Wang, Hong
name: Li, Yuexiang
name: Zhang, Haimiao
name: Meng, Deyu
name: Zheng, Yefeng
Publisher: name: arXiv
Year: 2021
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: During the computed tomography (CT) imaging process, metallic implants within patients often cause harmful artifacts, which adversely degrade the visual quality of reconstructed CT images and negatively affect the subsequent clinical diagnosis. For the metal artifact reduction (MAR) task, current deep learning based methods have achieved promising performance. However, most of them share two main common limitations: 1) the CT physical imaging geometry constraint is not comprehensively incorporated into deep network structures; 2) the entire framework has weak interpretability for the specific MAR task; hence, the role of each network module is difficult to be evaluated. To alleviate these issues, in the paper, we construct a novel deep unfolding dual domain network, termed InDuDoNet+, into which CT imaging process is finely embedded. Concretely, we derive a joint spatial and Radon domain reconstruction model and propose an optimization algorithm with only simple operators for solving it. By unfolding the iterative steps involved in the proposed algorithm into the corresponding network modules, we easily build the InDuDoNet+ with clear interpretability. Furthermore, we analyze the CT values among different tissues, and merge the prior observations into a prior network for our InDuDoNet+, which significantly improve its generalization performance.Comprehensive experiments on synthesized data and clinical data substantiate the superiority of the proposed methods as well as the superior generalization performance beyond the current state-of-the-art (SOTA) MAR methods. . Code is available at \url{https://github.com/hongwang01/InDuDoNet_plus}.
The simulation and stress relaxation of weld heat affected zones in a low alloy steel [microform]
Creators: name: Tranter, Norman Charles.
Publisher: name: Monash University
Year: 2022

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.
Effects of the momentum dependence of nuclear symmetry potential on pion observables in Sn + Sn collisions at 270 MeV/nucleon
Creators: name: Wei, Gao-Feng
name: Huang, Xin
name: Zhi, Qi-Jun
name: Dong, Ai-Jun
name: Peng, Chang-Gen
name: Long, Zheng-Wen
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Within a transport model, we study effects of the momentum dependence of nuclear symmetry potential on pion observables in central Sn + Sn collisions at 270 MeV/nucleon. To this end, a quantity $U_{sym}^{\infty}(ρ_{0})$, i.e., the value of nuclear symmetry potential at the saturation density $ρ_{0}$ and infinitely large nucleon momentum, is used to characterise the momentum dependence of nuclear symmetry potential. It is shown that with a certain $L$ (i.e., slope of nuclear symmetry energy at $ρ_{0}$) the characteristic parameter $U_{sym}^{\infty}(ρ_{0})$ of symmetry potential affects significantly the production of $π^{-}$ and $π^{+}$ as well as their pion ratios. Moreover, through comparing the charged pion yields, pion ratios as well the spectral pion ratios of theoretical simulations for the reactions $^{108}$Sn + $^{112}$Sn and $^{132}$Sn + $^{124}$Sn with the corresponding data in S$π$RIT experiments, we find that our results favor a constraint on $U_{sym}^{\infty}(ρ_{0})$, i.e., $-160^{+18}_{-9}$~MeV, and the $L$ is also suggested within a range, i.e., $62.7
description: 11 pages, 14 figures, add several references and several figures to interpret the results; original conclusion is not changed qualitatively, more stringent constraints on $U_{sym}^{\infty}(\rho_{0})$ are concluded quantitatively. Accepted for publication in Nuclear Science and Techniques
Microscopic derivation of the Bohr-Mottelson collective Hamiltonian and its application to quadrupole shape dynamics
Creators: name: Matsuyanagi, Kenichi
name: Matsuo, Masayuki
name: Nakatsukasa, Takashi
name: Yoshida, Kenichi
name: Hinohara, Nobuo
name: Sato, Koichi
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We discuss the nature of the low-frequency quadrupole vibrations from small-amplitude to large-amplitude regimes. We consider full five-dimensional quadrupole dynamics including three-dimensional rotations restoring the broken symmetries as well as axially symmetric and asymmetric shape fluctuations. Assuming that the time-evolution of the self-consistent mean field is determined by five pairs of collective coordinates and collective momenta, we microscopically derive the collective Hamiltonian of Bohr and Mottelson, which describes low-frequency quadrupole dynamics. We show that the five-dimensional collective Schrödinger equation is capable of describing large-amplitude quadrupole shape dynamics seen as shape coexistence/mixing phenomena. We summarize the modern concepts of microscopic theory of large-amplitude collective motion, which is underlying the microscopic derivation of the Bohr-Mottelson collective Hamiltonian.
description: 62 pages, 6 figures, Review article, Invited Comment in Focus Issue of Physica Scripta to celebrate the 40-year anniversary of the 1975 Nobel Prize to A. Bohr, B. R. Mottelson and L. J. Rainwater (Phys. Scr. 91 (2016) 063014). arXiv admin note: text overlap with arXiv:1606.04717
Permutation Matrix Modulation
Creators: name: Siregar, Rahmat Faddli
name: Rajatheva, Nandana
name: Latva-Aho, Matti
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Theory (cs.IT)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: We propose a novel scheme that allows MIMO system to modulate a set of permutation matrices to send more information bits, extending our initial work on the topic. This system is called Permutation Matrix Modulation (PMM). The basic idea is to employ a permutation matrix as a precoder and treat it as a modulated symbol. We continue the evolution of index modulation in MIMO by adopting all-antenna activation and obtaining a set of unique symbols from altering the positions of the antenna transmit power. We provide the analysis of the achievable rate of PMM under Gaussian Mixture Model (GMM) distribution \revv{and finite cardinality input (FCI). Numerical results are evaluated by comparing PMM with the other existing systems.} We also present a way to attain the optimal achievable rate of PMM by solving a maximization problem via interior-point method. A low complexity detection scheme based on zero-forcing (ZF) is proposed, and maximum likelihood (ML) detection is discussed. We demonstrate the trade-off between simulation of the symbol error rate (SER) and the computational complexity where ZF performs worse in the SER simulation but requires much less computational complexity than ML.
description: This article has been accepted for publication in IEEE Transaction on Wireless Communications
Disposal of spent automotive lubricating oils
Creators: name: Siemon, Donald McIver.
Publisher: name: Monash University
Year: 2022

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.
Internal Audit Function and Corporate Governance: in Commercial Banks
Creators: name: Gebregiorgis, Abraham
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2011

description: This research paper examined the role of IAF in corporate governance effectiveness in the case of 13 purposely sampled commercial banks by adopting concurrent mixed research approach. Quantitative methods were used through survey of internal auditors, and interviews and documentary sources taken under the qualitative methods. From the total of 105 questionnaires were distributed to internal auditors, 78 had collected and 8 interviews were conducted with vice-presidents of 8 banks. The main findings of the study were that the rates of implementation to audit recommendation by management, attributes of IAF (or the policy for hiring and training, experience and professional certification of internal auditors), and use of IAF working papers by external auditors in the banks were low. Thus, an IAF of the banks don't possess quality and its positive impact on corporate governance effectiveness is questionable, though IA practices were maintaining independence and it is value-added activity. Management of the banks need to take corrective action to audit recommendations and have to afford adequate attention to the proficiency of internal auditors to better equip an IAF quality and its role in corporate governance effectiveness. This finding indicated that extensive research should be taken in the quality of IAF and its role in corporate governance mechanisms and their interrelationships. Key words: Internal audit; internal audit function; quality internal audit function; corporate governance; commercial banks
On the discrete version of the Reissner-Nordström solution
Creators: name: Khatsymovsky, V. M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences
subject: 83C27, 83C57

description: This paper generalizes our previous paper on the discrete Schwarzschild type solution in the Regge calculus, the simplicial electrodynamics earlier considered in the literature is incorporated in the case of the presence of a charge. Validity of the path integral approach is assumed, of which the only consequence used here is a loose fixation of edge lengths around a finite nonzero scale (we have considered the latter earlier). In essence, the problem of determining the optimal background metric and electromagnetic field for the perturbative expansion generated by the functional integral is considered, for which the skeleton Regge and electrodynamic equations are analyzed. For the Regge equations, as we have earlier found, the Regge action on the simplest periodic simplicial structure and in the leading order over metric variations between 4-simplices can be substituted by a finite-difference form of the Hilbert-Einstein action (the piecewise constant metric there is defined by providing the vertices with coordinates). Thus we get the absence of the singularity inherent in the continuous solution. At the same time, the discrete solution is close to the continuum Reissner-Nordström one at large distances.
description: 22 pages
Optimal Weighted Load Balancing in TCAMs
Creators: name: Sadeh, Yaniv
name: Rottenstreich, Ori
name: Kaplan, Haim
Publisher: name: arXiv
Year: 2021
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Computer and information sciences

description: Traffic splitting is a required functionality in networks, for example for load balancing over multiple paths or among different servers. The capacities of the servers determine the partition by which traffic should be split. A recent approach implements traffic splitting within the ternary content addressable memory (TCAM), which is often available in switches. It is important to reduce the amount of memory allocated for this task since TCAMs are power consuming and are often also required for other tasks such as classification and routing. Previous work showed how to compute the smallest prefix-matching TCAM necessary to implement a given partition exactly. In this paper we solve the more practical case, where at most $n$ prefix-matching TCAM rules are available, restricting the ability to implement exactly the desired partition. We give simple and efficient algorithms to find $n$ rules that generate a partition closest in $L_\infty$ to the desired one. We do the same for a one-sided version of $L_\infty$ which equals to the maximum overload on a server and for a relative version of it. We use our algorithms to evaluate how the expected error changes as a function of the number of rules, the number of servers, and the width of the TCAM.
description: This is an extended version of a paper presented in ACM CoNEXT 2020
Determinants of Commercial Banks Deposit in Ethiopia
Creators: name: Teshome, Fisseha
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2017

description: This paper is an effort to reveal the insight dynamics that determine commercial banks deposit with reference to Ethiopian commercial banks. In order to achieve this objective the study adopts mixed research approach. Regarding to the qualitative data; the study used semi structured personal interview from the employees of sampled commercial banks of Ethiopia. Regarding to quantitative data the study referenced to Ethiopian commercial banks on basis of data covers sixteen years (1999/2000-2014/2015) period and the data was gotten from the reports of the regulatory body of the banks in Ethiopia i.e. the National Bank of Ethiopia (NBE), Central Statistical Authority, Ministry of Finance and Economic Cooperation and from others that are as secondary data sources from the eight commercial banks of Ethiopia. The Target population was all banks that engage in commercial activities and registered by National Bank of Ethiopia to act. Consequently, eight banks, out of the eighteen commercial banks in existence at 2014/15, have purposively been selected for the study. Result from using random effect panel least square regression exhibited that number of branch, deposit interest rate, loan to deposit ratio, annual inflation rate, real gross domestic product and population number were significant relationship with commercial banks deposit. Results from interview social awareness and regulation of anti money laundry and counter financial terrorism have an effect on commercial banks deposit. Finally the study suggests that Ethiopian commercial banks specifically private owned banks have to open more branches in order to more accessible to the society, as the same time to increase their deposit and competition with the public banks. And also The Ethiopian commercial banks have to work on creating of awareness about banking services by recruit sales persons, who have an experience in marketing, in order to advertise the products and services of the commercial banks through door to door activities. Key Words: Commercial Banks, Deposit, Ethiopia
Non-local parameterization of atmospheric subgrid processes with neural networks
Creators: name: Wang, Peidong
name: Yuval, Janni
name: O'Gorman, Paul A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Physical sciences

description: Subgrid processes in global climate models are represented by parameterizations which are a major source of uncertainties in simulations of climate. In recent years, it has been suggested that machine-learning (ML) parameterizations based on high-resolution model output data could be superior to traditional parameterizations. Currently, both traditional and ML parameterizations of subgrid processes in the atmosphere are based on a single-column approach, which only use information from single atmospheric columns. However, single-column parameterizations might not be ideal since certain atmospheric phenomena, such as organized convective systems, can cross multiple grid boxes and involve slantwise circulations that are not purely vertical. Here we train neural networks (NNs) using non-local inputs spanning over 3$\times$3 columns of inputs. We find that including the non-local inputs improves the offline prediction of a range of subgrid processes. The improvement is especially notable for subgrid momentum transport and for atmospheric conditions associated with mid-latitude fronts and convective instability. Using an interpretability method, we find that the NN improvements partly rely on using the horizontal wind divergence, and we further show that including the divergence or vertical velocity as a separate input substantially improves offline performance. However, non-local winds continue to be useful inputs for parameterizating subgrid momentum transport even when the vertical velocity is included as an input. Overall, our results imply that the use of non-local variables and the vertical velocity as inputs could improve the performance of ML parameterizations, and the use of these inputs should be tested in online simulations in future work.
description: 38 pages, 21 figures (7 figures in the main file)
The influence of saturation in transformers and shunt reactors on internal overvoltages
Creators: name: Schwarz, Matthias.
Publisher: name: Monash University
Year: 2022

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.
Architecture Knowledge Work: A User's Manual
Creators: name: Ponzo, Giorgio
Publisher: name: Leeds Beckett University
Year: 2023

description: Architecture Knowledge Work: A User’s Manual aims to formulate a theory for the production of architectural discourses recognising the centrality of personal — autobiographical — experience in contemporary modes of knowledge production. The thesis is a collection of stories that reveal how: the production of knowledge came to be recognised as a form of labour, i.e.’ knowledge work’, that engages the worker at an existential level (chapter one); how the form of knowledge delivered by autobiographical writing unveils distinct qualities of knowledge work contingent to the personal (chapter two); how autobiography (the story of one’s life) and work (the production of knowledge) come to coincide in a practice of architecture that becomes autotheoretical (chapter three); and how such processes can be demonstrated through my own attempts at autotheoretical architectural work by bridging personal and professional experiences (chapter four). The thesis is a collection of thoughts that, with different degrees of depth, focus and awareness, speak about the relationship between knowledge, work, architecture and life, proposing research and critical reflection processes that embrace, rather than exclude, the context of life as the inconsistent series of small and big events that characterise our daily endeavours and that, over time, shape our identity, in an indistinguishable tie between what we do and what we are. The thesis attempts to tell a possible story about the need to root architectural knowledge and design in more explicitly personal processes of reflection, arguing that the attention to the personal and to personal knowledge, is not a fashionable, passing phenomenon, but indicates a paradigm shift propelled by the desire to overcome the increasing detachment and discontentment that culminated at the end of the nineteenth century, between knowledge and personal life.
MPEC 2023-S96 : 2010 TE
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Quantifying the Interstellar Medium and Cosmic Rays in the MBM 53, 54, and 55 Molecular Clouds and the Pegasus Loop using Fermi-LAT Gamma-ray Observations
Creators: name: Mizuno, T.
name: Abdollahi, S.
name: Fukui, Y.
name: Hayashi, K.
name: Okumura, A.
name: Tajima, H.
name: Yamamoto, H.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: A study of the interstellar medium (ISM) and cosmic rays (CRs) using Fermi Large Area Telescope (LAT) data, in a region encompassing the nearby molecular clouds MBM 53, 54, and 55 and a far-infrared loop-like structure in Pegasus, is reported. By comparing Planck dust thermal emission model with Fermi-LAT gamma-ray data, it was found that neither the dust radiance (R) nor the dust opacity at 353 GHz (tau353) were proportional to the total gas column density N(Htot) primarily because N(Htot)/R and N(Htot)/tau353 depend on the dust temperature (Td). The N(Htot) distribution was evaluated using gamma-ray data by assuming the regions of high Td} to be dominated by optically thin atomic hydrogen (HI) and by employing an empirical linear relation of N(Htot)/R to Td. It was determined that the mass of the gas not traced by the 21-cm or 2.6-mm surveys is ~25% of the mass of HI in the optically thin case and is larger than the mass of the molecular gas traced by carbon monoxide by a factor of up to 5. The measured gamma-ray emissivity spectrum is consistent with a model based on CR spectra measured at the Earth and the nuclear enhancement factor of <=1.5. It is, however, lower than local HI emissivities reported by previous Fermi-LAT studies employing different analysis methods and assumptions on ISM properties by 15%-20% in energies below a few GeV, even if we take account of the statistical and systematic uncertainties. The origin of the discrepancy is also discussed.
description: accepted for publication in ApJ
Relief of Frustration in the Heisenberg Pyrochlore Antiferromagnet Gd$_2$Pt$_2$O$_7$
Creators: name: Hallas, A. M.
name: Sharma, A. Z.
name: Cai, Y.
name: Munsie, T. J.
name: Wilson, M. N.
name: Tachibana, M.
name: Wiebe, C. R.
name: Luke, G. M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The gadolinium pyrochlores, Gd$_2B_2$O$_7$, are amongst the best realizations of antiferromagnetically coupled Heisenberg spins on a pyrochlore lattice. We present a magnetic characterization of Gd$_2$Pt$_2$O$_7$, a unique member of this family. Magnetic susceptibility, heat capacity, and muon spin relaxation measurements show that Gd$_2$Pt$_2$O$_7$ undergoes an antiferromagnetic ordering transition at $T_N = 1.6$ K. This transition is strongly first order, as indicated by the sharpness of the heat capacity anomaly, thermal hysteresis in the magnetic susceptibility, and a non-divergent relaxation rate in $μ$SR. The form of the heat capacity below $T_N$ suggests that the ground state is an anisotropic collinear antiferromagnet with an excitation spectrum that is gapped by 0.245(1) meV. The ordering temperature in Gd$_2$Pt$_2$O$_7$, $T_N = 1.6$ K, is a substantial 160% increase from other gadolinium pyrochlores, which have been found to order at 1 K or lower. We attribute this enhancement in $T_N$ to the $B$-site cation, platinum, which, despite being non-magnetic, has a filled $5d$ $t_{2g}$ orbital and an empty $5d$ $e_g$ orbital that can facilitate superexchange. Thus, the magnetic frustration in Gd$_2$Pt$_2$O$_7$ is partially "relieved", thereby promoting magnetic order.
description: 8 pages, 6 figures
Assessment of the Financial and Operating Performance of Mfis: Vision Fund Microfinance Institution S.C
Creators: name: Mekonnen, Getachew
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2017

description: The objective of this study is to examine the overall financial and operational performances of Vision Fund Microfinance Institution S.C. for the recent five years (2012-2016). The paper is used both primary and secondary data sources which were analyzed using qualitative and quantitative methods applying a descriptive analysis method. Semi-structured interview was with the key officials of the institution at the head office level. Besides, a review of documents –both financial and non-financial was also used for the investigation. The major findings of the study indicate that VFMFI is increasing in terms of its breadth and depth of outreach. VFMFI can carry on in the future since its profitability is promising. From the financial sustainability point of view, VFMFI has been gone up the ladder of sustainability measures over those five consecutive years. The institution also manages its loan portfolio as shown by the ratio of portfolio at risk (PAR) which is greater than 30 days that declined throughout the years and the write-off ratio was getting closer to zero by the year 2016. Since the institution spends least costs in its operating and administrative expenses for serving and providing loan to a single client, the trend in this regard showed that VFMFI is cost efficient. Keywords: Micro Finance Institution, Financial & Operation Performance, Sustainability