cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Determinants of Dividend policy in Ethiopian private Banks
Creators: name: Tesfaye, Tadele
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2017

description: The dividend policy is one of the most debatable topics within corporate finance and some academics have called the company's dividend policy unsolved puzzle. Even though a lot of researches regarding dividends have been conducted, there is no uniform answer to the question: what are the determinants of the companies' dividend policy? Therefore,the researcher of this study decided to conduct a study regarding the determinants of dividend policy of Ethiopian private banks using bank specific factors and macro variables. The main objective of this study was to identify the determinants of dividend policy of Ethiopian private banks. To answer the objective of the study, explanatory and descriptive study used&the data covered the period from 2000-2015 for the sample of sixEthiopian private banks and used secondary and primary data. Both bank specific and macroeconomic variables were analyzed by employing the balanced panel fixed effect regression model andthe study used dividend policy as a dependent variable and seven independent variables; they are profit, leverage, liquidity, retained earnings, loan loss provision, lagged dividend payout, economic growth rate and inflation rate. The result of the study revealed that profit, leverage, and lagged dividend payment have positive and statistically significant impacts on dividend policy of Ethiopian private banks while retained earnings, loan loss provision, inflation have negative and statistically significant impact on dividend policy of Ethiopian private banks whereas liquidity and economic growth rate were found to be statistically insignificant and have no any impact on dividend policy of Ethiopian private banks. Keywords: Dividend policy, Ethiopian private banks, bank specific factors, macro variables
Phase diagram and non-Abelian symmetry locking for fermionic mixtures with unequal interactions
Creators: name: Barros, J. C. Pinto
name: Lepori, L.
name: Trombettoni, A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The occurrence of non-Abelian symmetry-locked states in ultracold fermionic mixtures with four components is investigated. We study the phase diagram in the presence of an attractive interaction between the species of two pairs of the mixture, and general (also repulsive) interactions between the species of each pair. This system is physically realized, e.g., in mixtures of two different earth-alkaline species, both of them with two hyperfine levels selectively populated. We find an extended region of the diagram exhibiting a two-flavors superfluid symmetry-locking (TSFL) phase. This phase is present also for not too large repulsive intra-pair interactions and it is characterized by a global non-Abelian symmetry group obtained by locking together two independent invariance groups of the corresponding normal state. Explicit estimates are reported for the mixture of the fermionic isotopes $^{171}\mathrm{Yb}$-$^{173}\mathrm{Yb}$, indicating that the TFSL phase can be achieved also without tuning the interactions between $\mathrm{Yb}$ atoms.
Persistent homology analysis of type 2 diabetes genome-wide association studies in protein-protein interaction networks
Creators: name: Song, Euijun
Publisher: name: arXiv
Year: 2023
Subjects: subject: Molecular Networks (q-bio.MN)
subject: Algebraic Topology (math.AT)
subject: FOS: Biological sciences
subject: FOS: Mathematics

description: Genome-wide association studies (GWAS) involving increasing sample sizes have identified hundreds of genetic variants associated with complex diseases, such as type 2 diabetes (T2D); however, it is unclear how GWAS hits form unique topological structures in protein-protein interaction (PPI) networks. Using persistent homology, this study explores the evolution and persistence of the topological features of T2D GWAS hits in the PPI network with increasing P-value thresholds. We define an $n$-dimensional persistent disease module as a higher-order generalization of the largest connected component (LCC). The 0-dimensional persistent T2D disease module is the LCC of the T2D GWAS hits, which is significantly detected in the PPI network (196 nodes and 235 edges, P$<$0.05). In the 1-dimensional homology group analysis, all 18 1-dimensional holes (loops) of the T2D GWAS hits persist over all P-value thresholds. The 1-dimensional persistent T2D disease module comprising these 18 persistent 1-dimensional holes is significantly larger than that expected by chance (59 nodes and 83 edges, P$<$0.001), indicating a significant topological structure in the PPI network. Our computational topology framework potentially possesses broad applicability to other complex phenotypes in identifying topological features that play an important role in disease pathobiology.
description: 13 pages, 4 figures, manuscript revised
A feasibility study for a hydrofoil ferry service on Port Phillip Bay (Victoria)
Creators: name: Beggs, Peter D.
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.
$β$-particle energy-summing correction for $β$-delayed proton emission measurements
Creators: name: Meisel, Z.
name: del Santo, M.
name: Crawford, H. L.
name: Cyburt, R. H.
name: Grinyer, G. F.
name: Langer, C.
name: Montes, F.
name: Schatz, H.
name: Smith, K.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: A common approach to studying $β$-delayed proton emission is to measure the energy of the emitted proton and corresponding nuclear recoil in a double-sided silicon-strip detector (DSSD) after implanting the $β$-delayed proton emitting ($β$p) nucleus. However, in order to extract the proton-decay energy, the measured energy must be corrected for the additional energy implanted in the DSSD by the $β$-particle emitted from the $β$p nucleus, an effect referred to here as $β$-summing. We present an approach to determine an accurate correction for $β$-summing. Our method relies on the determination of the mean implantation depth of the $β$p nucleus within the DSSD by analyzing the shape of the total (proton + recoil + $β$) decay energy distribution shape. We validate this approach with other mean implantation depth measurement techniques that take advantage of energy deposition within DSSDs upstream and downstream of the implantation DSSD.
description: Published in Nuclear Instruments and Methods in Physics Research A
Determinants of Dividend Policy: Evidence from Ethiopian Insurance Companies
Creators: name: Getachew, Samuel
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2017

description: The purpose of this study was to examine the determinants of dividend policy in Ethiopian insurance companies. For this purpose, samples of nine Ethiopian insurance companies were selected. Ordinary Least Squares (OLS) Regression was used to examine the impact of profitability, liquidity, leverage, firm size, growth opportunity, previous year dividend and asset structure on dividend policy in the insurance sector over a period of nine years from 2007/08 to 2015/16. The empirical results of this study showed that profitability, leverage, liquidity, previous year dividend and asset structure have a positive relationship with dividend payout. Meanwhile, firm size and growth opportunities have a negative relationship with dividend payout. Furthermore, the results of the analysis indicated that profitability, liquidity, growth opportunities, previous year dividend and asset structure were the major factors that affected dividend policies of Ethiopian insurance companies and mangers of Ethiopian insurance companies need to consider these factors while setting/revising their dividend payout policy; on the same token investors need to consider these factors in their investment decisions when they want to make an investment in Ethiopian insurance companies.Moreover, further investigations including different company selected factors like firm's age, business risk, insider ownership, corporate tax and capital structure would provide better insight for determinants of dividend policy in Ethiopian insurance Companies. Keyword: Dividend policy; Dividend payout; Insurance Companies
The Linear Growth of Structure in the R_h=ct Universe
Creators: name: Melia, Fulvio
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We use recently published redshift space distortion measurements of the cosmological growth rate, f sigma_8(z), to examine whether the linear evolution of perturbations in the R_h=ct cosmology is consistent with the observed development of large scale structure. We find that these observations favour R_h=ct over the version of LCDM optimized with the joint analysis of Planck and linear growth rate data, particularly in the redshift range 0 < z < 1, where a significant curvature in the functional form of f sigma_8(z) predicted by the standard model---but not by R_h=ct---is absent in the data. When LCDM is optimized using solely the growth rate measurements, however, the two models fit the observations equally well though, in this case, the low-redshift measurements find a lower value for the fluctuation amplitude than is expected in Planck LCDM. Our results strongly affirm the need for more precise measurements of f sigma_8(z) at all redshifts, but especially at z < 1.
description: 26 pages, 3 figures. Accepted for publication in MNRAS
An ALMA Glimpse of Dense Molecular Filaments Associated with High-mass Protostellar Systems in the Large Magellanic Cloud
Creators: name: Tokuda, Kazuki
name: Harada, Naoto
name: Tanaka, Kei E. I.
name: Inoue, Tsuyoshi
name: Shimonishi, Takashi
name: Zhang, Yichen
name: Sewiło, Marta
name: Kunitoshi, Yuri
name: Konishi, Ayu
name: Fukui, Yasuo
name: Kawamura, Akiko
name: Onishi, Toshikazu
name: Machida, Masahiro N.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Recent millimeter/sub-millimeter facilities have revealed the physical properties of filamentary molecular clouds in relation to high-mass star formation. A uniform survey of the nearest, face-on star-forming galaxy, the Large Magellanic Cloud (LMC), complements the Galactic knowledge. We present ALMA survey data with a spatial resolution of $\sim$0.1 pc in the 0.87 mm continuum and HCO$^{+}$(4-3) emission toward 30 protostellar objects with luminosities of 10$^4$-10$^{5.5}$ $L_{\odot}$ in the LMC. The spatial distributions of the HCO$^{+}$(4-3) line and thermal dust emission are well correlated, indicating that the line effectively traces dense, filamentary gas with an H$_2$ volume density of $\gtrsim$10$^5$ cm$^{-3}$ and a line mass of $\sim$10$^3$-10$^{4}$ $M_{\odot}$ pc$^{-1}$. Furthermore, we obtain an increase in the velocity linewidths of filamentary clouds, which follows a power-law dependence on their H$_2$ column densities with an exponent of $\sim$0.5. This trend is consistent with observations toward filamentary clouds in nearby star-forming regions withiin $ \lesssim$1 kpc from us and suggests enhanced internal turbulence within the filaments owing to surrounding gas accretion. Among the 30 sources, we find that 14 are associated with hub-filamentary structures, and these complex structures predominantly appear in protostellar luminosities exceeding $\sim$5 $\times$10$^4$ $L_{\odot}$. The hub-filament systems tend to appear in the latest stages of their natal cloud evolution, often linked to prominent H$\;${\sc ii} regions and numerous stellar clusters. Our preliminary statistics suggest that the massive filaments accompanied by hub-type complex features may be a necessary intermediate product in forming extremely luminous high-mass stellar systems capable of ultimately dispersing the parent cloud.
description: 21 pages, 8 figures, 4 tables, accepted for publication in ApJ
Multiscale water accounting under climate change in a transboundary West African basin [Abstract only].
Creators: name: Dembele, Moctar
name: Salvadore, E.
name: Zwart, Sander
name: Ceperley, N.
name: Mariethoz, G.
name: Schaefli, B.
Publisher: name: Unknown
Year: 2023
Subjects: subject: Agricultural Finance
subject: Financial Economics
subject: Water accounting
subject: Climate change
subject: Transboundary waters
subject: River basins
subject: Models
subject: Volta River Basin

description: Paper presented at the European Geosciences Union (EGU) General Assembly 2023, Vienna, Austria and Online, 24-28 April 2023.
title: Διαδραστική αρχιτεκτονική σε σχολικές αυλές, τι μπορούν να μας μάθουν τα παιδιά;
title: Interactive architecture in schoolyards, what can children teach us?
Creators: name: Σημαρεση Παρασκευη-Δημητρα
Publisher: name: Technical University of Crete
Year: 2023

description: Η εισαγωγή της διαδραστικής αρχιτεκτονικής στο περιβάλλον του σχολικού προαυλίου αποτελεί την βασική προσέγγιση της έρευνας. Αρχικά προσεγγίζεται η έννοια της διαδραστικής αρχιτεκτονικής, αποδομούνται οι παράγοντες που την συνθέτουν, δηλαδή ο χρήστης, ο σχεδιαστής και η υλικότητα, καταγράφονται οι μελλοντικές δυνατότητες και τέλος παρατίθενται υλοποιημένα παραδείγματα. Στην συνέχεια προσεγγίζεται η έννοια της σχολικής αυλής, δημοτικού σχολείου, και οι εκφάνσεις της, ως μέσου εκπαίδευσης και ως μέσου παιχνιδιού και δίνονται παραδείγματα. Ταυτόχρονα η έρευνα που πραγματοποιήθηκε εξετάζει πως παιδιά πρώτης δημοτικού διαμορφώνουν αυτόνομες χωρικές ενότητες και πως δομούν τις σχέσεις μεταξύ αυτών και του περιβάλλοντος τους, που στην παρούσα περίπτωση είναι το σχολικό προαύλιο. Η έρευνα θα έχει δύο στάδια. Το ατομικό που είναι μικρής κλίμακας, έχει μορφή σύντομης χειροτεχνίας και πραγματοποιείται εντός της αίθουσας. Το ομαδικό αγγίζει την φυσική κλίμακα των παιδιών, πραγματοποιείται στο προαύλιο και έχει την μορφή παιχνιδιού και ζωγραφικής. Επίσης μέσω της έρευνας εξετάζονται ζητήματα συμπεριληπτικού σχεδιασμού. Τέλος παρατίθενται τα συμπεράσματα σχετικά με την διαδραστική σχολική αυλή.
Silicon-aluminium-oxy-nitride ceramics
Creators: name: Bailey, Graeme J.
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.
Scaling limit of the sandpile identity element on the Sierpinski gasket
Creators: name: Kaiser, Robin
name: Sava-Huss, Ecaterina
Publisher: name: arXiv
Year: 2023
Subjects: subject: Combinatorics (math.CO)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 31E05, 60J10, 60J45, 05C81

description: We investigate the identity element of the sandpile group on finite approximations of the Sierpinski gasket with normal boundary conditions and show that the sequence of piecewise constant continuations of the identity elements on SG_n converges in the weak* sense to the constant function with value 4 on the Sierpinski gasket SG. We then generalize the proof to a wider range of functions and obtain the scaling limit for the identity elements with different choices of sink vertices.
description: 13 pages, 10 figures; to appear in the proceedings Volume
The Determinants of Financial Distress: Empirical Evidence from Banks in Ethiopia
Creators: name: Yirgu, Tadesse
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2017

description: This research is aimed to test the level of financial distress of commercial banks in Ethiopia and identify its determinant. In order to achieve these objectives secondary data was collected for eight banks for sample period covering from 2006 to 2015 and analyzed using descriptive statistics and fixed effect (FE) regression model. Based on the descriptive statistics the study concludes that sampled banks were under distress. The FE regression model identified capital adequacy, management efficiency, earning ability and bank size as having negative effect on banking financial distress and except size all of them appeared significant; whereas asset quality and liquidity appeared as having positive effect, but liquidity was only significant. Regarding the macroeconomic factors, economic growth and saving interest rate have significantly negative and positive effect on banking financial distress respectively; whereas inflation was not significant. In general, the research concludes that both bank specific and macroeconomic factors determine the level of financial distress of Ethiopian commercial banks. Key words: Altman Z-score, CAMEL, Financial Distress, Ethiopian Commercial Banks
A new tool to derive simultaneously exponent and extremes of power-law distributions
Creators: name: Pezzuto, S.
name: Coletta, A.
name: Klessen, R. S.
name: Schisano, E.
name: Benedettini, M.
name: Elia, D.
name: Molinari, S.
name: Soler, J. D.
name: Traficante, A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Many experimental quantities show a power-law distribution $p(x)\propto x^{-α}$. In astrophysics, examples are: size distribution of dust grains or luminosity function of galaxies. Such distributions are characterized by the exponent $α$ and by the extremes $x_\text{min}$ $x_\text{max}$ where the distribution extends. There are no mathematical tools that derive the three unknowns at the same time. In general, one estimates a set of $α$ corresponding to different guesses of $x_\text{min}$ $x_\text{max}$. Then, the best set of values describing the observed data is selected a posteriori. In this paper, we present a tool that finds contextually the three parameters based on simple assumptions on how the observed values $x_i$ populate the unknown range between $x_\text{min}$ and $x_\text{max}$ for a given $α$. Our tool, freely downloadable, finds the best values through a non-linear least-squares fit. We compare our technique with the maximum likelihood estimators for power-law distributions, both truncated and not. Through simulated data, we show for each method the reliability of the computed parameters as a function of the number $N$ of data in the sample. We then apply our method to observed data to derive: i) the slope of the core mass function in the Perseus star-forming region, finding two power-law distributions: $α=2.576$ between $1.06\,M_{\sun}$ and $3.35\,M_{\sun}$, $α=3.39$ between $3.48\,M_{\sun}$ and $33.4\,M_{\sun}$; ii) the slope of the $γ$-ray spectrum of the blazar J0011.4+0057, extracted from the Fermi-LAT archive. For the latter case, we derive $α=2.89$ between 1,484~MeV and 28.7~GeV; then we derive the time-resolved slopes using subsets 200 photons each.
description: Corrected few typos found at proof-reading stage. The only important modification is in Table 4 where "x_M not constrained" is now "x_M=40"
Phase- and intensity-dependence of ultrafast dynamics in hydrocarbon molecules in few-cycle laser fields
Creators: name: Kübel, Matthias
name: Burger, Christian
name: Siemering, Robert
name: Kling, Nora G.
name: Bergues, Boris
name: Alnaser, Ali S.
name: Ben-Itzhak, Itzik
name: Moshammer, Robert
name: de Vivie-Riedle, Regina
name: Kling, Matthias F.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: In strong laser fields, sub-femtosecond control of chemical reactions with the carrier-envelope phase (CEP) becomes feasible. We have studied the control of reaction dynamics of acetylene and allene in intense few-cycle laser pulses at 750 nm, where ionic fragments are recorded with a reaction microscope. We find that by varying the CEP and intensity of the laser pulses it is possible to steer the motion of protons in the molecular dications, enabling control over deprotonation and isomerization reactions. The experimental results are compared to predictions from a quantum dynamical model, where the control is based on the manipulation of the phases of a vibrational wave packet by the laser waveform. The measured intensity dependence in the CEP-controlled deprotonation of acetylene is well captured by the model. In the case of the isomerization of acetylene, however, we find differences in the intensity dependence between experiment and theory. For the isomerization of allene, an inversion of the CEP-dependent asymmetry is observed when the intensity is varied, which we discuss in light of the quantum dynamical model. The inversion of the asymmetry is found to be consistent with a transition from non-sequential to sequential double ionization.
description: 15 pages, 8 figures
Analytical results for binary dynamics at the first post-Newtonian order in Einstein-Cartan theory with the Weyssenhoff fluid
Creators: name: De Falco, Vittorio
name: Battista, Emmanuele
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The quantum spin effects inside matter can be modeled via the Weyssenhoff fluid, which permits to unearth a formal analogy between general relativity and Einstein-Cartan theory at the first post-Newtonian order. In this framework, we provide some analytical formulas pertaining to the dynamics of binary systems having the spins aligned perpendicular to the orbital plane. We derive the expressions of the relative orbit and the coordinate time, which in turn allow to determine the gravitational waveform, and the energy and angular momentum fluxes. The potentialities of our results are presented in two astrophysical applications, where we compute: ($i$) the quantum spin contributions to the energy flux and gravitational waveform during the inspiral phase; ($ii$) the macroscopic angular momentum of one of the bodies starting from the time-averaged energy flux and the knowledge of few timing parameters.
description: 13 pages, 2 figures, accepted for pubblication on Phys. Rev. D
Response of the Martian Ionosphere to Solar Activity including SEPs and ICMEs in a two week period starting on 25 February 2015
Creators: name: Duru, F.
name: Gurnett, D. A.
name: Morgan, D. D.
name: Halekas, J.
name: Frahm, R. A.
name: Lundin, R.
name: Dejong, W.
name: Ertl, C.
name: Venable, A.
name: Wilkinson, C.
name: Fraenz, M.
name: Nemec, F.
name: Connerney, J. E. P.
name: Espley, J. R.
name: Larson, D.
name: Winningham, J. D.
name: Plaut, J.
name: Mahaffy, P. R.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: In a two-week period between February and March of 2015, a series of interplanetary coronal mass ejections (ICMEs) and (solar energetic particles) SEPs made contact with Mars. The interactions were observed by several spacecraft, including Mars Express (MEX), Mars Atmosphere and Volatile Evolution Mission (MAVEN), and Mars Odyssey (MO). The ICME disturbances were characterized by an increase in ion speed, plasma temperature, magnetic field magnitude, and energetic electron flux. Furthermore, increased solar wind density and speeds, unusually high local electron densities and high flow velocities were detected on the nightside at high altitudes during the March 8th event. These effects are thought to be due to the transport of ionospheric plasma away from Mars. The peak electron density at periapsis shows a substantial increase, reaching number densities about 2.7 x 104 cm-3 during the second ICME in the deep nightside, which corresponds to an increase in the MOHigh-Energy Neutron Detector flux, suggesting an increase in the ionization of the neutral atmosphere due to the high intensity of charged particles. SEPs show a substantial enhancement before the shock of fourth ICME causing impact ionization and absorption of the surface echo intensity which drops to the noise levels. Moreover, the peak ionospheric density exhibits a discrete enhancement over a period of about 30 hrs around the same location, which maybe due to impact ionization. Ion escape rates at this time are calculated to be in the order of 1025 - 1026 s-1, consistent with MAVEN results, but somewhat higher.
Model Selection with Baryonic Acoustic Oscillations in the Lyman-alpha Forest
Creators: name: Melia, Fulvio
Publisher: name: arXiv
Year: 2023
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The recent release of the final, complete survey of Lyman-alpha baryonic acoustic oscillation measurements provides the most significant and accurate data base for studying cosmic geometry at an effective redshift z_eff=2.334, which is inaccessible to other sources. In this Letter, we use these data to select among four distinct cosmologies: Planck LCDM, the R_h=ct universe, the Milne universe and Einstein-de Sitter. Given the breadth and depth of the Lyman-alpha study, this BAO measurement alone provides a strong model comparison, complementary to previous studies that combined Lyman-$α$ data with measurements at lower redshifts. Though both approaches are useful, the latter tends to dilute the disparity between model predictions and the observations. We therefore examine how the models compare to each other strictly based on the BAO scale measured in the Lyman-alpha forest and background quasars. We find that Milne and Einstein-de Sitter are strongly ruled out by these data. There is also strong evidence disfavoring the standard model. The Lyman-alpha measurements are completely consistent with the cosmic geometry predicted by R_h=ct. As such, evidence continues to grow that the zero active mass condition from general relativity ought to be an essential ingredient in LCDM.
description: 6 pages, 1 figure, 1 table. Accepted for publication in Europhysics Letters (EPL)
The Role of Internal Audit in Detecting Fraud: the Case of Ethiopian Budgetary Public Sectors
Creators: name: Etana, Alemayehu
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2016

description: Internal audit is important as an essential internal assurance mechanism in controlling fraud in budgetary Public sectors. In addition, it assists government organizations to achieve accountability and integrity, improve the implementation of government programs and develop confidence among citizens and stakeholders as well as to offer any risk of mismanagement of public fund. The scope of this study covers the role of internal audit in Federal Ministries and Government Universities to fight fraud. This study employs a cross sectional survey to investigate the role of internal audit and descriptive statistic was used to analyze the data from the survey. This study examined the Role of Internal Audit in Detection and Prevention of Fraud in Ethiopian budgetary Public sectors. The survey found out hat there is insufficient auditors' competence and independence problem toward the usefulness of internal audit work to detect and prevent fraud. It also determined the internal audit risk assessment that contributes in detection and prevention of Fraud. The study concluded that Internal Audit of budgetary Public sector slack sufficient competence and independence to prevent and detect fraud. Fraud risk assessment is not exercised which support internal audit to control fraud. As a result, the role of the internal audit in fraud prevention and detection is minor. Keywords: Internal Audit, public budgetary sector, Fraud Detection and prevention.
Phase diagram of matrix compressed sensing
Creators: name: Schülke, Christophe
name: Schniter, Philip
name: Zdeborová, Lenka
Publisher: name: arXiv
Year: 2016
Subjects: subject: Information Theory (cs.IT)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: In the problem of matrix compressed sensing we aim to recover a low-rank matrix from few of its element-wise linear projections. In this contribution we analyze the asymptotic performance of a Bayes-optimal inference procedure for a model where the matrix to be recovered is a product of random matrices. The results that we obtain using the replica method describe the state evolution of the recently introduced P-BiG-AMP algorithm. We show the existence of different types of phase transitions, their implications for the solvability of the problem, and we compare the results of the theoretical analysis to the performance reached by P-BiG-AMP. Remarkably the asymptotic replica equations for matrix compressed sensing are the same as those for a related but formally different problem of matrix factorization.
description: 23 pages, 8 figures
NIR Tully-Fisher in the Zone of Avoidance. -- III. Deep NIR catalogue of the HIZOA galaxies
Creators: name: Said, Khaled
name: Kraan-Korteweg, Renée C.
name: Jarrett, T. H.
name: Staveley-Smith, Lister
name: Williams, Wendy L.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We present a deep near-infrared (NIR) photometric catalogue of sources from the Parkes HI Zone of Avoidance (HIZOA) survey, which forms the basis for an investigation of the matter distribution in the Zone of Avoidance. Observations were conducted between 2006 and 2013 using the Infrared Survey Facility (IRSF), a 1.4-m telescope situated at the South African Astronomical Observatory site in Sutherland. The images cover all 1108 HIZOA detections and yield 915 galaxies. An additional 105 bright 2MASS galaxies in the southern ZOA were imaged with the IRSF, resulting in 129 galaxies. The average $K_s$-band seeing and sky background for the survey are 1.38 arcsec and 20.1 mag, respectively. The detection rate as a function of stellar density and dust extinction is found to depend mainly on the HI mass of the HI detected galaxies, which in principal correlates with the NIR brightness of the spiral galaxies. The measured isophotal magnitudes are of sufficient accuracy (errors $\sim$ 0.02 mag) to be used in a Tully-Fisher analysis. In the final NIR catalogue, 285 galaxies have both IRSF and 2MASS photometry (180 HIZOA plus 105 bright 2MASX galaxies). The $K_s$-band isophotal magnitudes presented in this paper agree, within the uncertainties, with those reported in the 2MASX catalogue. Another 30 galaxies, from the HIZOA northern extension, are also covered by UKIDSS Galactic Plane Survey (GPS) images, which are one magnitude deeper than our IRSF images. A modified version of our photometry pipeline was used to derive the photometric parameters of these UKIDSS galaxies. Good agreement was found between the respective $K_s$-band isophotal magnitudes. These comparisons confirm the robustness of the isophotal parameters and demonstrate that the IRSF images do not suffer from foreground contamination, after star removal, nor under-estimate the isophotal fluxes of ZoA galaxies.
description: 14 pages, 8 figures, 3 tables, accepted for publication in MNRAS
Risk Management and Its Impact on Financial Performance of Commercial Banks in Ethiopia
Creators: name: Mitku, Endaweke
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2015

description: Risk management has become an important topic for financial institutes, especially since the business sector of financial services is related to conditions of uncertainty. The turmoil of the financial industry emphasizes the importance of effective risk management procedures. Consequently, this thesis studies "Risk management and its impact on performance in Ethiopian Commercial Banks." The aim of this paper is therefore to identify the impact of risk management and its impact on bank performance on the Ethiopian bank performance . Balanced fixed effect panel regression was used for the data of eight commercial banks in the sample covered the period from 2002 to 2013. Four risk management variable that affects banks performance were selected and analyzed. The results of panel data regression analysis showed that credit risk management indicator (NPLR), Liquidity risk management indicator(LIQR) and operational risk indicator (CIR) had negative and statistically significant impact on banks performance .Capital adequacy ratio had positive statistically insignificant impact on banks performance. In addition to this the study is also analysis of primary data by descriptive statistical tools and on hypothesis testing using regression model. This leads the researcher to conclude in the last section that banks with good risk management policies have a lower risk and relatively higher return on asset. Finaly None performing loan ratio, liquidity ratio and cost to income ratio are significant key drivers of performance of commercials banks in Ethiopia. Indeed focusing and reengineering the institutions alongside these indicators could enhance the profitability as well as the performance of the commercialbanksinEthiopia. Key Words; Bank Performance, Risk Management, Liquidity Risk, Credit Risk Operational Risk
Factors Affecting Banks Profitability: An Empirical Study on Ethiopian Private Commercial Banks
Creators: name: Tefera, Sori
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2014

description: This study examined factors affecting profitability of private commercial banks' in Ethiopia. The study adopted quantitative research approach and the statistical cost accounting model was used to estimate the profitability, which was measured by return on asset as a function of balance sheet, industry specific and macroeconomic explanatory variables. The finding of the study show that loan and advance, current deposit, other liabilities and gross domestic product have statistically significant and positive relationship with banks' profitability. On the other hand, variables like fixed deposit, market concentration have a negative and statistically significant relationship with banks' profitability. However, the relationship of deposit with other banks, sum of investment, saving deposit and inflation is found to be statistically insignificant. As a result, the study recommended that private commercial banks should focus on increasing public awareness to mobilize more savings this will enhance their performance in provision of loans and advance to customers. Finally, private commercial banks should not only be concerned about internal structures and policies, but they must consider both the internal environment and the macroeconomic environment together in fashioning out strategies to improve their profitability. Key words: Asset Liability Management, Statistical Cost Accounting Model, Profitability
Treatment and disposal of water-borne wastes from an oil refinery
Creators: name: Henson, G. W.
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.
B meson decays in covariant confined quark model
Creators: name: Dubnička, Stanislav
name: Dubničková, Anna Zuzana
name: Ivanov, Mikhail Alekseevich
name: Liptaj, Andrej
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The aim of this text to present the covariant confined quark model (CCQM) and review its applications to the decays of $B$ mesons. We do so in the context of existing experimental measurements and theoretical results of other authors, which we review also. The physics principles are in detail exposed for the CCQM, the other results (theoretical and experimental) are surveyed in an enumerative way with comments. We proceed by considering successively three categories of decay processes: leptonic, semileptonic and non-leptonic.
Hare&Hounds Exercise for Stellar Ages and Masses in the Context of FGK Stars with and without Asteroseismology.
Creators: name: Bossini, Diego
name: Campante, Tiago
name: Moedas, Nuno
name: Bonfanti, Andrea
name: Reese, Daniel
name: Weeks, Angharad
name: Farnir, Martin
name: Neitzel, Andreas
name: Van Grootel, Valerie
name: Van Eylen, Vincent
name: Lebreton, Yveline
name: Danielski, Camilla
Publisher: name: Zenodo
Year: 2023

description: Accurate and precise determination of the global properties, such as ages and masses of stars, is a fundamental step in order to characterize the host-planet systems. The advanced techniques offered by Asteroseismology have given us fundamental additional constraints that enormously increased our ability to model those stars. However the derived quantities are usually presented in literature case-by-case (i.e. once a planet candidate is detected). This results in a non-homogeneous census of stars, caused by the use of different optimization methods coupled with several input physics adopted in stellar models. Therefore many tests have been performed with the aim of identifying and assessing the impact on the derived stellar properties of several pipelines. Nevertheless many of the targets in the PLATO mission will not benefit from the advantage of having asteroseismic data. In this talk we present the team effort of the Ariel Stellar Age-Mass-Radius sub-WG of evaluating the accuracy of FGK stars on mass and age using several pipelines to estimate stellar properties, by data comparison with pre-computed grids of evolutionary tracks. A forward modeling hare-and-hounds (H&H) exercise was conducted using 5 optimizations pipelines (BASTA, CLES-on-the-fly, ISOCHRONE PLACEMENT, PARAM, SPiNS) and 5 different stellar evolution grids (BASTI, CLES, GARSTEC, MESA, PARSEC), deriving stellar properties from sets of observational constraints with and without seismic constraints. This will in turn allow us to evaluate the accuracy of the results and reliability of the associated error bars.
description: This work is support from Fundação para a Ciência e Tecnologia (FCT) through work contract nº DL 57/2016/CP1364/CT0006. and through national funds by these grant UIDB/04434/2020 & UIDP/04434/2020, 2022.06962.PTDC and 2022.03993.PTDC. C.D. acknowledges financial support from the grant CEX2021-001131-S funded by MCIN/AEI/10.13039/501100011033.
Design and Validation of a Wireless Drone Docking Station
Creators: name: Stuhne, Dario
name: Vasiljevic, Goran
name: Bogdan, Stjepan
name: Kovacic, Zdenko
Publisher: name: arXiv
Year: 2023
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Drones are increasingly operating autonomously, and the need for extending drone power autonomy is rapidly increasing. One of the most promising solutions to extend drone power autonomy is the use of docking stations to support both landing and recharging of the drone. To this end, we introduce a novel wireless drone docking station with three commercial wireless charging modules. We have developed two independent units, both in mechanical and electrical aspects: the energy transmitting unit and the energy receiving unit. We have also studied the efficiency of wireless power transfer and demonstrated the advantages of connecting three receiver modules connected in series and parallel. We have achieved maximum output power of 96.5 W with a power transfer efficiency of 56.6% for the series connection of coils. Finally, we implemented the system in practice on a drone and tested both energy transfer and landing.
description: 2023 International Conference on Unmanned Aircraft Systems (ICUAS)
Arithmetic properties for cubic partition pairs modulo powers of 3
Creators: name: Chern, Shane
Publisher: name: arXiv
Year: 2016
Subjects: subject: Number Theory (math.NT)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05A17 (Primary), 11P83 (Secondary)

description: Let $b(n)$ denote the number of cubic partition pairs of $n$. In this paper, we aim to provide a strategy to obtain arithmetic properties of $b(n)$. This gives affirmative answers to two of Lin's conjectures.
Magnetic Flux Cancellation as the Trigger of Solar Quiet-Region Coronal Jets
Creators: name: Panesar, Navdeep K.
name: Sterling, Alphonse C.
name: Moore, Ronald L.
name: Chakrapani, Prithi
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We report observations of ten random on-disk solar quiet region coronal jets found in high resolution Extreme Ultraviolet (EUV) images from the Solar Dynamics Observatory (SDO)/Atmospheric Imaging Assembly (AIA) and having good coverage in magnetograms from the SDO/Helioseismic and Magnetic Imager (HMI). Recent studies show that coronal jets are driven by the eruption of a small-scale filament (called a minifilament). However the trigger of these eruptions is still unknown. In the present study we address the question: what leads to the jet-driving minifilament eruptions? The EUV observations show that there is a cool-transition-region-plasma minifilament present prior to each jet event and the minifilament eruption drives the jet. By examining pre-jet evolutionary changes in the line-of-sight photospheric magnetic field we observe that each pre-jet minifilament resides over the neutral line between majority-polarity and minority-polarity patches of magnetic flux. In each of the ten cases, the opposite-polarity patches approach and merge with each other (flux reduction between 21 and 57%). After several hours, continuous flux cancellation at the neutral line apparently destabilizes the field holding the cool-plasma minifilament to erupt and undergo internal reconnection, and external reconnection with the surrounding-coronal field. The external reconnection opens the minifilament field allowing the minifilament material to escape outwards, forming part of the jet spire. Thus we found that each of the ten jets resulted from eruption of a minifilament following flux cancellation at the neutral line under the minifilament. These observations establish that magnetic flux cancellation is usually the trigger of quiet region coronal jet eruptions.
description: 7 pages, 4 Figures, 1 Table, Accepted for publication in ApJL
Compliance Cost of Employment in Come Tax Payers in Addis Ababa City Administration
Creators: name: Mengistu, Tewodros
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2016

description: The paper examines the tax compliance costs of employment income taxpayers in Addis Ababa. one research question and one hypothesis were investigated in this study: (RQ1) how much compliance costs of the individual income tax system borne directly by the taxpayers themselves, including both the time spent and pecuniary expenditures? (And (H1) the compliance costs of individual income tax are relatively low in terms of their costs per individual: especially costs of time and monetary costs. The survey was conducted to a total of 250 individual income tax payers and questionnaires were distributed to those individual taxpayers in the administrative city of Addis Ababa in Ethiopia. A total of 200responses were received and used for the final data analysis. The findings from the survey provide pertinent and useful insights about the compliance costs of Addis Ababa individual taxpayers. The average values per tax payers were 157.78 ETB and the average times spent by tax payers for filing their tax return were 7.54hrs. In all, the study found that the compliance costs of individual taxpayers in Addis Ababa were relatively low in term of the total monetary value. Keywords: compliance cost, income tax, Addis Ababa
Evaluating HPX and Kokkos on RISC-V using an Astrophysics Application Octo-Tiger
Creators: name: Diehl, Parick
name: Daiss, Gregor
name: Brandt, Steven R.
name: Kheirkhahan, Alireza
name: Kaiser, Hartmut
name: Taylor, Christopher
name: Leidel, John
Publisher: name: arXiv
Year: 2023
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: In recent years, computers based on the RISC-V architecture have raised broad interest in the high-performance computing (HPC) community. As the RISC-V community develops the core instruction set architecture (ISA) along with ISA extensions, the HPC community has been actively ensuring HPC applications and environments are supported. In this context, assessing the performance of asynchronous many-task runtime systems (AMT) is essential. In this paper, we describe our experience with porting of a full 3D adaptive mesh-refinement, multi-scale, multi-model, and multi-physics application, Octo-Tiger, that is based on the HPX AMT, and we explore its performance characteristics on different RISC-V systems. Considering the (limited) capabilities of the RISC-V test systems we used, Octo-Tiger already shows promising results and good scaling. We, however, expect that exceptional hardware support based on dedicated ISA extensions (such as single-cycle context switches, extended atomic operations, and direct support for HPX's global address space) would allow for even better performance results.
Spin susceptibility of Andreev bound states
Creators: name: Rosemeyer, Benjamin
name: Vorontsov, Anton
Publisher: name: arXiv
Year: 2016
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We calcuate electronic spin susceptibility and spin-lattice relaxation rate in singlet superconductor near a pairbreaking surface, or in a domain wall of the order parameter. We directly link presence of high-density Andreev bound states in the inhomogeneous region, combined with coherence factors, to enhancement of the susceptibility above the normal state's value for certain $\bf q$ vectors. Beside the dominant peak at ferromagnetic vector $q=0$, we find significant enhancement of antiferromagnetic correlations at vectors $q\lesssim 2 k_f$, with $\bf q$ $along$ the domain wall in $S$-wave superconductor, and $across$ domain wall in $D$-wave (nodes along the wall). These features are destroyed by applying moderate Zeeman field that splits the zero-energy peak. We solve Bogoliubov-de Gennes equations in momentum space and our results deviate from the lattice models investigated previously. Large enhancement of the spin-lattice relaxation rate $T_1^{-1}$ at the domain wall provides clear signature of the quasiparticle bound states, and is in good agreement with recent experiment in organic superconductor $κ$-(BEDT-TTF)$_2$Cu(NCS)$_2$.
description: 10 pages, 6 figures