cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Additional file 3 of ExerG: adapting an exergame training solution to the needs of older adults using focus group and expert interviews
Creators: name: Ringgenberg, Nathalie
name: Mildner, Sarah
name: Hapig, Marcia
name: Hermann, Sarah
name: Kruszewski, Katharina
name: Martin-Niedecken, Anna Lisa
name: Rogers, Katja
name: Schättin, Alexandra
name: Behrendt, Frank
name: Böckler, Sonja
name: Schmidlin, Stefan
name: Jurt, Roman
name: Niedecken, Stephan
name: Brenneis, Christian
name: Bonati, Leo H.
name: Schuster-Amft, Corina
name: Seebacher, Barbara
Publisher: name: figshare
Year: 2022
Subjects: subject: Medicine
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: Science Policy

description: Additional file 3. ExerG—Semi-structured interview guide, Interview guide with procedures and prepared questions for the semi-structured interviews with primary, secondary, and tertiary end users.
Powers of the theta divisor and relations in the tautological ring
Creators: name: Clader, Emily
name: Grushevsky, Samuel
name: Janda, Felix
name: Zakharov, Dmitry
Publisher: name: arXiv
Year: 2016
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: We show that the vanishing of the $(g+1)$-st power of the theta divisor in the cohomology and Chow rings of the universal abelian variety implies, by pulling back along a collection of Abel-Jacobi maps, the vanishing results in the tautological ring of $\mathcal{M}_{g,n}$ of Looijenga, Ionel, Graber-Vakil, and Faber-Pandharipande. We also show that Pixton's double ramification cycle relations, which generalize the theta vanishing relations and were recently proved by the first and third authors, imply Theorem $\star$ of Graber and Vakil. Moreover, our proof provides an algorithm for expressing any tautological class on $\overline{\mathcal{M}}_{g,n}$ of sufficiently high codimension as a tautological class supported on the boundary.
description: v2: agrees with published version, 27 pages
Galaxy properties from J-PAS narrow-band photometry
Creators: name: Mejía-Narváez, A.
name: Bruzual, G.
name: C., G. Magris
name: Alcaniz, J. S.
name: Benítez, N.
name: Carneiro, S.
name: Cenarro, A. J.
name: Cristóbal-Hornillos, D.
name: Dupke, R.
name: Ederoclite, A.
name: Marín-Franch, A.
name: de Oliveira, C. Mendes
name: Moles, M.
name: Sodre, L.
name: Taylor, K.
name: Varela, J.
name: Ramió, H. Vázquez
Publisher: name: arXiv
Year: 2017
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We study the consistency of the physical properties of galaxies retrieved from SED-fitting as a function of spectral resolution and signal-to-noise ratio (SNR). Using a selection of physically motivated star formation histories, we set up a control sample of mock galaxy spectra representing observations of the local universe in high-resolution spectroscopy, and in 56 narrow-band and 5 broad-band photometry. We fit the SEDs at these spectral resolutions and compute their corresponding the stellar mass, the mass- and luminosity-weighted age and metallicity, and the dust extinction. We study the biases, correlations, and degeneracies affecting the retrieved parameters and explore the rôle of the spectral resolution and the SNR in regulating these degeneracies. We find that narrow-band photometry and spectroscopy yield similar trends in the physical properties derived, the former being considerably more precise. Using a galaxy sample from the SDSS, we compare more realistically the results obtained from high-resolution and narrow-band SEDs (synthesized from the same SDSS spectra) following the same spectral fitting procedures. We use results from the literature as a benchmark to our spectroscopic estimates and show that the prior PDFs, commonly adopted in parametric methods, may introduce biases not accounted for in a Bayesian framework. We conclude that narrow-band photometry yields the same trend in the age-metallicity relation in the literature, provided it is affected by the same biases as spectroscopy; albeit the precision achieved with the latter is generally twice as large as with the narrow-band, at SNR values typical of the different kinds of data.
description: 26 pages, 15 figures. Accepted for publication in MNRAS
Additional file 4 of ExerG: adapting an exergame training solution to the needs of older adults using focus group and expert interviews
Creators: name: Ringgenberg, Nathalie
name: Mildner, Sarah
name: Hapig, Marcia
name: Hermann, Sarah
name: Kruszewski, Katharina
name: Martin-Niedecken, Anna Lisa
name: Rogers, Katja
name: Schättin, Alexandra
name: Behrendt, Frank
name: Böckler, Sonja
name: Schmidlin, Stefan
name: Jurt, Roman
name: Niedecken, Stephan
name: Brenneis, Christian
name: Bonati, Leo H.
name: Schuster-Amft, Corina
name: Seebacher, Barbara
Publisher: name: figshare
Year: 2022
Subjects: subject: Medicine
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: Science Policy

description: Additional file 4. Detailed list of end users’ verbatim quotations, Verbatim quotations, and supplementary quotes from the interviews for primary, secondary, and tertiary end users.
Merger: Valuation Process and Evaluation of Financial Performance in Case of United Insurance Company and Shama Plc
Creators: name: Bayou, Jemaneh
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2008

description: This paper entitled "Merger: Valuation process and Evaluation of Financial Performance" circulates around the key issues in merger valuation and financial performance of merged companies before and after merger. The objective is to identify the rationales of merger, strategic and financial intents of mergers and evaluate the performance of merged companies before and after merger. The data used in the study was obtained through questionnaire and interview with the executives of merged companies. In addition, the deed of merger and financial statements are thoroughly investigated to understand the merger process and financial performance of the merged companies. The performance 5 years before merger and 5 years after merger are investigated using financial statement analysis. In order to substantiate the result t- test was used for hypothesis testing The study finding indicates that the major merger motive is enhancing profitability. It is also found that the merger process is simply pooling the audited financial statements of companies going for merger. The study analysis made both by financial statements analysis and the hypothesis testing made shows that performance of firms after merger has not increased as compared to the performance of firms before merger
Adoption of Electronic Banking System in Ethiopian Banking Industry: Barriers and Drivers
Creators: name: Gemechu, Ayana
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2012

description: This thesis aims to examine adoption of E-banking in the Ethiopian banking industry with respect to the barriers which can influence firms from taking advantage of E-banking system and expected benefits derived by adopting the system. The study was conducted based on the data gathered from four banks in Ethiopia; three private banks (Dashen bank, Zemen bank and Wegagen bank) and one state owned bank (commercial bank of Ethiopia). A mixed research approach was used to answer the research questions that emerge through the review of existing literature and the experiences of the researcher in respect of the E- banking system in Ethiopia. The study statistically analyse data obtained from the survey questionnaire. A research framework developed based on technology-organization- environment framework and Technology acceptance model to guide the study. The result of the study indicated that, the major barriers Ethiopian banking industry faces in the adoption of Electronic banking are, security risk, lack of trust, lack of legal and regulatory frame work, Lack of ICT infrastructure and absence of competition between local and foreign banks. The study also identified perceived ease of use and perceived usefulness as a driver of adopting E-banking system. The study suggests a series of measures which could be taken by the banking industry and by government to address various challenges identified in the thesis. These measures include: Establishing a clear set of legal frame work on the use of technology in banking industry, supporting banking industry by investing on ICT infrastructure and banks needs to be focused on technological innovation competition rather than traditional bases of retail bank competition
Factors Affecting Tax Audit Effectiveness Evidence from Large Tax Payers office of Ethiopian Revenue and Customs Authority
Creators: name: Abera, Melat
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2016

description: he purpose of this study is to investigate factors affecting tax audit effectiveness on large tax payer's office. The study stands to answer the following research question "How do audit quality, management support, organizational setting, auditee attributes, organizational independence and the interplay among them, influence audit effectiveness in LTO?" In light of this objective the study adopted mixed research method of research approaches to test a series research hypothesis. Specifically, the study used survey of questionnaire analysisoffices' on tax auditors and interview analysis on team leaders and process owners. Then tax auditors and team leaders were selected based on simple random sampling method of census method. Because, the target population to be studied is small. In large tax payer's office there are 62 tax auditors supervised and lead by 10 team leaders managed by two process owners. Then the researcher distributes those questioners to the 62 tax auditors, only 59 of them are returned. Consequently, Data was then analyzed on quantitative basis using Pearson's correlation, linear regression analysis and descriptive statistics. Qualitatively interview and documentary evidences summarized and presented. The results showed that there is no statistical significance negative relationship between auditee attributes and tax audit effectiveness. Besides, the results showed that Tax Audit Effectiveness of Large tax payer's office is highly affected by audit quality of the department, managements support and the organizations independence from unethical practices. While as auditors perception it doesn't be affected by organizational i setting and auditees attribute
Minimal models of some differential graded modules
Creators: name: Şentürk, Berrin
name: Ünlü, Özgün
Publisher: name: arXiv
Year: 2018
Subjects: subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics
subject: 16E45, 18D50

description: Minimal models of chain complexes associated with free torus actions on spaces have been extensively studied in the literature. In this paper, we discuss these constructions using the language of operads. The main goal of this paper is to define a new Koszul operad that has projections onto several of the operads used in these minimal model constructions.
description: 17 pages. To appear in Applied Categorical Structures
Comparison of flood routing methods for natural rivers
Creators: name: Weinmann, Peter Erwin.
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.
Quasisymmetric Embeddability of Weak Tangents
Creators: name: Li, Wen-Bo
Publisher: name: arXiv
Year: 2018
Subjects: subject: Metric Geometry (math.MG)
subject: FOS: Mathematics
subject: 30L10, 30L05 (Primary), 37F15 (Secondary)

description: In this paper, we study the quasisymmetric embeddability of weak tangents of metric spaces. We first show that quasisymmetric embeddability is hereditary, i.e., if $X$ can be quasisymmetrically embedded into $Y$, then every weak tangent of $X$ can be quasisymmetrically embedded into some weak tangent of $Y$, given that $X$ is proper and doubling. However, the converse is not true in general; we will illustrate this with several counterexamples. In special situations, we are able to show that the embeddability of weak tangents implies global or local embeddability of the ambient space. Finally, we apply our results to Gromov hyperbolic groups and visual spheres of expanding Thurston maps.
description: 39 pages, 5 figures
Internal Audit Practices A Case of Ethiopian Governmental Higher Educational Institutions
Creators: name: Fekadu, Betelhem
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2009

description: The main purpose of this study was to investigate challenging factors that has influenced the Ethiopian higher governmental institutions to pursue their internal audit practice. The study was continued to four universities, Adama University, Hawasa University, Harama University and Addis Ababa University. Seven internal auditors were used as data source which were selected using convenience sampling techniques. To obtain the required information open-ended and closed ended questionnaires were used as data gathering tools. Then qualitative approaches were employed to analyze and interpret the filled in data. The findings of the study showed that lack of proper management commitment, lack of developmental programs for internal auditors and other organizational factors were critical factors influencing effectiveness of IAF in the respective universities. To alleviate those problems, it is recommended that management and the audit division of the respective universities has to work jointly to improve the IAF of their respective universities as per requirements of international standards
Revolut’s Revolution: The Rise of a Digital Bank
Creators: name: Rybacki, Paweł
Publisher: name: University of Chicago
Year: 2022
Subjects: subject: revolut
subject: digital bank
subject: case study
subject: neobank
subject: fintech
subject: business
subject: banking
subject: digital transformation
subject: digital-only bank

description: Revolut, a British fintech company, achieved a remarkable success: As a digital-only bank with the highest valuation, funding, revenues, and total deposits, it emerged as a leader of the digital revolution in banking. It adopted the best model of a bank of the future: an agile, adaptive, and datadriven ecosystem of financial services with a friendly face and excellent user experience. By prioritizing expansion over profitability and performance over the well-being of its employees, Revolut grew from a currency exchange startup to a digital bank and the United Kingdom’s most valued private company in just seven years of operation. While Revolut still has a long way to measure up with the top traditional banking institutions in the United Kingdom, it has already become an alternative that challenged their market power and pushed them to compete. This case study is an in-depth analysis of Revolut’ rise as a digital bank.
Continuous-variable quantum digital signatures over insecure channels
Creators: name: Thornton, Matthew
name: Scott, Hannah
name: Croal, Callum
name: Korolkova, Natalia
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Digital signatures ensure the integrity of a classical message and the authenticity of its sender. Despite their far-reaching use in modern communication, currently used signature schemes rely on computational assumptions and will be rendered insecure by a quantum computer. We present a quantum digital signatures (QDS) scheme whose security is instead based on the impossibility of perfectly and deterministically distinguishing between quantum states. Our continuous-variable (CV) scheme relies on phase measurement of a distributed alphabet of coherent states, and allows for secure message authentication against a quantum adversary performing collective beamsplitter and entangling-cloner attacks. Crucially, for the first time in the CV setting we allow for an eavesdropper on the quantum channels and yet retain shorter signature lengths than previous protocols with no eavesdropper. This opens up the possibility to implement CV QDS alongside existing CV quantum key distribution (QKD) platforms with minimal modification.
description: 11 pages, 8 figures. Accepted version
The Future of X-ray Reverberation from AGN
Creators: name: Fabian, A. C.
name: Alston, W. N.
name: Cackett, E. M.
name: Kara, E.
name: Uttley, P.
name: Wilkins, D. R.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: XMM-Newton is capable of making a transformational advance in our understanding of how luminous accreting black holes work, by dedicating about 10 per cent of future observing time to long observations, of order Megaseconds, to X-ray variable Active Galactic Nuclei (AGN) research. This would enable reverberation studies, already a commonplace feature of AGN, to proceed to the next level and follow the behaviour of the powerful dynamic corona. Such a dedicated legacy programme can only be carried out with XMM-Newton.
description: 5 pages, 5 figures for publication in Astronomische Nachrichten as part of the proceedings of the workshop "XMM-Newton: The Next Decade"
Surface Words are Determined by Word Measures on Groups
Creators: name: Magee, Michael
name: Puder, Doron
Publisher: name: arXiv
Year: 2019
Subjects: subject: Group Theory (math.GR)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 20E05 (Primary) 20B30, 68R15, 20F12 (Secondary)

description: Every word $w$ in a free group naturally induces a probability measure on every compact group $G$. For example, if $w=\left[x,y\right]$ is the commutator word, a random element sampled by the $w$-measure is given by the commutator $\left[g,h\right]$ of two independent, Haar-random elements of $G$. Back in 1896, Frobenius showed that if $G$ is a finite group and $ψ$ an irreducible character, then the expected value of $ψ\left(\left[g,h\right]\right)$ is $\frac{1}{ψ\left(e\right)}$. This is true for any compact group, and completely determines the $\left[x,y\right]$-measure on these groups. An analogous result holds with the commutator word replaced by any surface word. We prove a converse to this theorem: if $w$ induces the same measure as $\left[x,y\right]$ on every compact group, then, up to an automorphism of the free group, $w$ is equal to $\left[x,y\right]$. The same holds when $\left[x,y\right]$ is replaced by any surface word. The proof relies on the analysis of word measures on unitary groups and on orthogonal groups, which appears in separate papers, and on new analysis of word measures on generalized symmetric groups that we develop here.
description: 16 pages, fixed the proof of Theorem 3.6, updated references
Epistemological and Bibliometric Analysis of Ethics and Shared Responsibility Health Policy and IoT Systems
Creators: name: Radanliev, Petar
name: De Roure, David
Publisher: name: arXiv
Year: 2019
Subjects: subject: Other Computer Science (cs.OH)
subject: FOS: Computer and information sciences

description: The focus in this paper is placed on shared responsibility and ethics in health policy, specific to Internet of Things (IoT) devices in healthcare systems. The article assesses how the introduction of IoT brings risks to the security of medical systems. The justification for this research emerges from the opportunities emerging from digital technologies for medical services, but also creating a range of new cyber risks in the shared healthcare infrastructure. Such concerns are often not visible to individual departments in an integrated healthcare system. In addition, many healthcare organisations do not possess cyber skills and are faced with barriers to the adoption of smart manufacturing technologies, e.g., cost. These barriers trigger ethical concerns related to responsibility of cyber risks in shared healthcare systems.
Matrix Group Integrals, Surfaces, and Mapping Class Groups II: $\mathrm{O}\left(n\right)$ and $\mathrm{Sp}\left(n\right)$
Creators: name: Magee, Michael
name: Puder, Doron
Publisher: name: arXiv
Year: 2019
Subjects: subject: Geometric Topology (math.GT)
subject: Mathematical Physics (math-ph)
subject: Group Theory (math.GR)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 60b20 (Primary) 20e05, 22e30, 28c10, 22c05, 46L54, 57M50, 57m20, 57m07, 20f65, 20f12 (Secondary)

description: Let $w$ be a word in the free group on $r$ generators. The expected value of the trace of the word in $r$ independent Haar elements of $\mathrm{O}(n)$ gives a function ${\cal T}r_{w}^{\mathrm{O}}(n)$ of $n$. We show that ${\cal T}r_{w}^{\mathrm{O}}(n)$ has a convergent Laurent expansion at $n=\infty$ involving maps on surfaces and $L^{2}$-Euler characteristics of mapping class groups associated to these maps. This can be compared to known, by now classical, results for the GUE and GOE ensembles, and is similar to previous results concerning $\mathrm{U}\left(n\right)$, yet with some surprising twists. A priori to our result, ${\cal T}r_{w}^{\mathrm{O}}(n)$ does not change if $w$ is replaced with $α(w)$ where $α$ is an automorphism of the free group. One main feature of the Laurent expansion we obtain is that its coefficients respect this symmetry under $\mathrm{Aut}(\mathrm{\mathbf{F}}_{r})$. As corollaries of our main theorem, we obtain a quantitative estimate on the rate of decay of ${\cal T}r_{w}^{\mathrm{O}}(n)$ as $n\to\infty$, we generalize a formula of Frobenius and Schur, and we obtain a universality result on random orthogonal matrices sampled according to words in free groups, generalizing a theorem of Diaconis and Shahshahani. Our results are obtained more generally for a tuple of words $w_1,\ldots,w_\ell$, leading to functions ${\cal T}r_{w_{1},\ldots,w_{\ell}}^{\mathrm{O}}$. We also obtain all the analogous results for the compact symplectic groups $\mathrm{Sp}\left(n\right)$ through a rather mysterious duality formula.
description: 47 pages, 2 tables, 6 figures; journal version, incorporated referee's comments. To appear in Math. Annalen
Finite temperature corrections to a NLO Nambu-Jona-Lasinio model
Creators: name: Frasca, Marco
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We derive the next-to-leading order correction to the Nambu-Jona-Lasinio model starting from quantum chromodynamics. So, we are able to fix the constants of the Nambu-Jona-Lasinio model from quantum chromodynamics and analyze the behavior of strong interactions at low energies. The technique is to expand in powers of currents the generating functional. We apply it to a simple Yukawa model with self-interaction showing how this has a Nambu-Jona-Lasinio model and its higher order corrections as a low-energy limit. The same is shown to happen for quantum chromodynamics in the chiral limit with two quarks. We prove that a consistent thermodynamic behaviour is obtained as expected for the given parameters.
description: 4 pages, 2 figures. Contribution to the proceedings of the 19th International Conference in Quantum Chromodynamics (QCD 16), 4 July - 8 July 2016, Montpellier (France).Added the reference to the review by Brodsky, de Teramond and Deur
Hubble Space Telescope Observations of Active Asteroid 324P/La Sagra
Creators: name: Jewitt, David
name: Agarwal, Jessica
name: Weaver, Harold
name: Mutchler, Max
name: Li, Jing
name: Larson, Stephen
Publisher: name: arXiv
Year: 2016
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Hubble Space Telescope observations of active asteroid 324P/La Sagra near perihelion show continued mass loss consistent with the sublimation of near-surface ice. Isophotes of the coma measured from a vantage point below the orbital plane are best matched by steady emission of particles having a nominal size $a \sim$ 100 $μ$m. The inferred rate of mass loss, $dM_d/dt \sim$0.2 kg s$^{-1}$, can be supplied by sublimation of water ice in thermal equilibrium with sunlight from an area as small as 930 m$^2$, corresponding to about 0.2\% of the nucleus surface. Observations taken from a vantage point only 0.6\degr~from the orbital plane of 324P set a limit to the velocity of ejection of dust in the direction perpendicular to the plane, $V_{\perp}
description: 31 pages, 6 figures, 4 tables, Accepted by The Astronomical Journal
Domain Wall Enabled Steep Slope Switching in MoS$_2$ Transistors Towards Hysteresis-Free Operation
Creators: name: Song, Jingfeng
name: Qi, Yubo
name: Xiao, Zhiyong
name: Wang, Kun
name: Li, Dawei
name: Kim, Seung-Hyun
name: Kingon, Angus I.
name: Rappe, Andrew M.
name: Hong, Xia
Publisher: name: arXiv
Year: 2019
Subjects: subject: Applied Physics (physics.app-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The device concept of ferroelectric-based negative capacitance (NC) transistors offers a promising route for achieving energy-efficient logic applications that can outperform the conventional semiconductor technology, while viable operation mechanisms remain a central topic of debate. In this work, we report steep slope switching in MoS$_2$ transistors back-gated by single-layer polycrystalline PbZr$_{0.35}$Ti$_{0.65}$O$_3$. The devices exhibit current on/off ratios up to 8$\times$10$^6$ within an ultra-low gate voltage window of $V_g$ = $\pm$0.5 V and subthreshold swing (SS) as low as 9.7 mV decade$^{-1}$ at room temperature, transcending the 60 mV decade$^{-1}$ Boltzmann limit without involving additional dielectric layers. Theoretical modeling reveals the dominant role of the metastable polar states within domain walls in enabling the NC mode, which is corroborated by the relation between SS and domain wall density. Our findings shed light on a hysteresis-free mechanism for NC operation, providing a simple yet effective material strategy for developing low-power 2D nanoelectronics.
description: 26 pages, 5 figures, and Supplementary Information
Determinants of Financial Risks of Private Commercial Banks In Ethiopia
Creators: name: Tona, Emawayih
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2017

description: While financial risk is one of the major risks of banks that can affect the development of financial system, identifying the determinants of this risk is crucial for the soundness of financial sector. The main objective of this study is to find out determinants of financial risk in Ethiopian private commercial banks covering a period of fifteen years (2001-2015) on six sample private commercial banks using quantitative research approach. This study directly examined indicators of financial risk in terms of credit risk and liquidity risk in an objective manner from a wide range of variables. Bank specific and macroeconomic variables were tested for the two dependent variables credit and liquidity risk models by using the balanced panel fixed effect regression model. The findings of the study for credit risk model revealed that Loan to deposit ratio (Liquidity), income diversification, non performing loan, real GDP growth rate and inflation have significant positive impact on credit risk whereas return on asset found significant negative impact on credit risk of Ethiopian private banks. The rest three bank specific variables Loan growth, bank size and operating inefficiency had no significant effect on credit risk of Ethiopian private banks during the test period 2001 to 2015.The regression result of the second financial risk indicator liquidity risk revealed that capital adequacy ratio and Real GDP growth rate have significant positive impact on liquidity risk whereas Banks age and Average Nominal lending interest rate have significant negative impact on liquidity risk. Finally the result indicates that return on asset, Tangibility and impaired loan have negative but insignificant relationship with liquidity risk. Key words: Financial risk, credit risk, Liquidity risk, Ethiopian Private Commercial Banks
Lightlike and ideal tetrahedra
Creators: name: Meusburger, Catherine
name: Scarinci, Carlos
Publisher: name: arXiv
Year: 2019
Subjects: subject: Geometric Topology (math.GT)
subject: Mathematical Physics (math-ph)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We give a unified description of tetrahedra with lightlike faces in 3d anti-de Sitter, de Sitter and Minkowski spaces and of their duals in 3d anti-de Sitter, hyperbolic and half-pipe spaces. We show that both types of tetrahedra are determined by a generalized cross-ratio with values in a commutative 2d real algebra that generalizes the complex numbers. Equivalently, tetrahedra with lightlike faces are determined by a pair of edge lengths and their duals by a pair of dihedral angles. We prove that the dual tetrahedra are precisely the generalized ideal tetrahedra introduced by Danciger. Finally, we compute the volumes of both types of tetrahedra as functions of their edge lengths or dihedral angles, obtaining generalizations of the Milnor-Lobachevsky volume formula of ideal hyperbolic tetrahedra.
description: 39 pages, 5 figures. Revised version
Off-diagonal Bethe Ansatz for the $D^{(1)}_3$ model
Creators: name: Li, Guang-Liang
name: Cao, Junpeng
name: Xue, Panpan
name: Hao, Kun
name: Sun, Pei
name: Yang, Wen-Li
name: Shi, Kangjie
name: Wang, Yupeng
Publisher: name: arXiv
Year: 2019
Subjects: subject: Mathematical Physics (math-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The exact solutions of the $D^{(1)}_3$ model (or the $so(6)$ quantum spin chain) with either periodic or general integrable open boundary conditions are obtained by using the off-diagonal Bethe Ansatz. From the fusion, the complete operator product identities are obtained, which are sufficient to enable us to determine spectrum of the system. Eigenvalues of the fused transfer matrices are constructed by the $T-Q$ relations for the periodic case and by the inhomogeneous $T-Q$ one for the non-diagonal boundary reflection case. The present method can be generalized to deal with the $D^{(1)}_{n}$ model directly.
description: typos are corrected. arXiv admin note: text overlap with arXiv:1902.08891
Moving Towards Open Set Incremental Learning: Readily Discovering New Authors
Creators: name: Leo, Justin
name: Kalita, Jugal
Publisher: name: arXiv
Year: 2019
Subjects: subject: Machine Learning (cs.LG)
subject: Computation and Language (cs.CL)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: The classification of textual data often yields important information. Most classifiers work in a closed world setting where the classifier is trained on a known corpus, and then it is tested on unseen examples that belong to one of the classes seen during training. Despite the usefulness of this design, often there is a need to classify unseen examples that do not belong to any of the classes on which the classifier was trained. This paper describes the open set scenario where unseen examples from previously unseen classes are handled while testing. This further examines a process of enhanced open set classification with a deep neural network that discovers new classes by clustering the examples identified as belonging to unknown classes, followed by a process of retraining the classifier with newly recognized classes. Through this process the model moves to an incremental learning model where it continuously finds and learns from novel classes of data that have been identified automatically. This paper also develops a new metric that measures multiple attributes of clustering open set data. Multiple experiments across two author attribution data sets demonstrate the creation an incremental model that produces excellent results.
description: Accepted to Future of Information and Communication Conference (FICC) 2020
Performance of Selected Microfinance Institutions in Ethiopian: A Balanced Scorecard Approach
Creators: name: Kebede, Eyerusalem
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2014

description: This study analyze the performance of selected microfinance institutions in Ethiopianusing a balanced score card (BSC) performance analysis approach which integrate both financial and nonfinancial metrics. The BSC framework of the study developed using a total of 20 performance indicators which were equally categorized under the 4 BSC perspectives (financial, customer, internal business process and learning and growth). The developed framework applied to purposively selected8 MFIs operating in Ethiopia which have head office in Addis Ababa and report to Association of Ethiopian Microfinance Institutions (AEMFI) starting from 2007-2012 consecutively. Quantitative research approach adopted and primary data collected using five scale Likert and secondary data obtained from AEMF used. A total of 10 microfinance experts, 110 staffs and 60 clients participated in the study. The analysis is done using descriptive statistics and SPSS version 21 used. The findings of the study shows based on financial performance results, on average the institutions reviewed were sustainable with high relative productivity and low profitability. The average nonfinancial performance was also high, indicating that the studied institutions were highly performing in nonfinancial measures likewise the financial. Beside the performance results the findings of this study confirmed the relationship assumption of BSC perspectives and it shows positive correlation among them. The study concludes comprehensive performance is observed when measured in a collective way. So, Ethiopian MFIs suggested paying attention on the use of BSC as a performance measurement tool and also hub to specified performance indicators that needs enhancement. Key words: - Microfinance, Performance and BSC
What Makes the Stringent Policy? Shifting bureaucratic incentives and blame-avoiding in China’s war on COVID-19
Creators: name: Qingqing Shi
Publisher: name: University of Chicago
Year: 2022

description: In the war on the COVID-19 pandemic, China is famous for resorting to top-down, stringent measures to cut off the outbreaks, and it proves to be successful in eliminating infections. Officials have insisted ultra-strict COVID-zero strategy, at the great expense of the local economic prosperity and social welfare. Why would China show a great preference for this costly method of pandemic control? And one more nuanced puzzle is that the use of stringent policies varies between the regions. Why some of them are more inclined to employ coercive capacities? By studying the provincial policy stringency of dealing with the Delta variants throughout 2021, I argue that the application of stringent policy not only hinges on the infection risk but is also a strategy for bureaucrats to avoid blame. It offers a solution to the principal-agent problem and is an unexpected result of the incentive structure of China. When the weak institutions could not hold the bureaucrats accountable, the leaders showed a pattern different from credit-claiming - with less promotion possibility, they use more high-profile enforcement campaigns to enhance oversight over bureaucrats to increase the credibility of the punishment - and thus minimize risks. I illustrate it using the Oxford COVID-19 Government Response Tracker (OxCGRT) Data and the original data on Chinese provincial leader cadres. This finding uncovers the new relationship between bureaucrats’ incentives and policy implementation in China. It shows that when the institution is weak, it is effective to make it up with campaigns to shape the motivation, but the cost is high.
Continuity of Lyapunov exponents for non-uniformly fiber-bunched cocycles
Creators: name: Freijo, Catalina
name: Marin, Karina
Publisher: name: arXiv
Year: 2019
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: We provide conditions which imply the continuity of the Lyapunov exponents for non-uniformly fiber-bunched cocycles in $SL(2,\mathbb{R})$. The main theorem is an extension of the result of Backes, Brown and Butler and gives a partial answer to a conjecture of Marcelo Viana.
DETERMINATION OF THE NUMBER OF MOBILE WORKSHOP EXECUTIVES PROVIDING SERVICE TO THE GROUP OF GRAIN COMBINEERS
Creators: name: Kharakulov, T.T.
Publisher: name: Zenodo
Year: 2024

description: The article presents the results of research on determining the number of mobile workshop workers serving a group of grain harvesters during the harvest for grain-growing clusters. According to calculations, when the service intensity of the mobile workshop is equal to  (pieces/day), it was found that a mobile workshop consisting of 2 specialists can provide full technical service to a group of 8 grain harvesters.
FINANCIAL PERFORMANCE AND WORKING CAPITAL MANAGEMENT AT DEVI MOTORS - A YAMAHA DEALERSHIP PERSPECTIVE
Creators: name: Dr. D. Divya*, R. Darshan** & A. Sheik Abdullah**
Publisher: name: Zenodo
Year: 2025

description: Working capital management plays a vital role in ensuring financial stability, operational efficiency, and profitability for businesses. This study examines the working capital management practices of Devi Motors, an authorized dealer of Yamaha Motors, over a five- year period (2020-2024). The research analyzes liquidity, asset utilization, and financial performance using secondary data from financial statements. Key findings reveal a consistent increase in working capital, with a significant rise in 2024 due to higher trade debtors and closing stock. While this growth indicates expansion, it also raises concerns about credit risk and inventory management. The study suggests optimizing receivables management and inventory control to enhance financial sustainability. By implementing effective working capital strategies, Devi Motors can maintain liquidity, minimize financial risks, and support long-term profitability.
The Infrared-Gamma-Ray Connection: A WISE View of the Extragalactic Gamma-Ray Sky
Creators: name: Massaro, F.
name: D'Abrusco, R.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Using data from the WISE all-sky survey we discovered that the non-thermal infrared (IR) emission of blazars, the largest known population of extragalactic gamma-ray sources, has peculiar spectral properties. In this work, we confirm and strengthen our previous analyses using the latest available releases of both the WISE and the Fermi source catalogs. We also show that there is a tight correlation between the mid-IR colors and the gamma-ray spectral index of Fermi blazars. We name this correlation "the infrared--gamma-ray connection". We discuss how this connection links both the emitted powers and the spectral shapes of particles accelerated in jets arising from blazars over ten decades in energy. Based on this evidence, we argue that the infrared--gamma-ray connection is stronger than the well known radio--gamma-ray connection.
description: 7 pages, 4 figures, pre-proof version, published on the Astrophysical Journal - http://www.nasa.gov/feature/goddard/2016/nasas-wise-fermi-missions-reveal-a-surprising-blazar-connection
Agile and versatile quantum communication: signatures and secrets
Creators: name: Richter, Stefan
name: Thornton, Matthew
name: Khan, Imran
name: Scott, Hannah
name: Jaksch, Kevin
name: Vogl, Ulrich
name: Stiller, Birgit
name: Leuchs, Gerd
name: Marquardt, Christoph
name: Korolkova, Natalia
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Agile cryptography allows for a resource-efficient swap of a cryptographic core in case the security of an underlying classical cryptographic algorithm becomes compromised. Conversely, versatile cryptography allows the user to switch the cryptographic task without requiring any knowledge of its inner workings. In this paper, we suggest how these related principles can be applied to the field of quantum cryptography by explicitly demonstrating two quantum cryptographic protocols, quantum digital signatures (QDS) and quantum secret sharing (QSS), on the same hardware sender and receiver platform. Crucially, the protocols differ only in their classical post-processing. The system is also suitable for quantum key distribution (QKD) and is highly compatible with deployed telecommunication infrastructures, since it uses standard quadrature phase shift keying (QPSK) encoding and heterodyne detection. For the first time, QDS protocols are modified to allow for postselection at the receiver, enhancing protocol performance. The cryptographic primitives QDS and QSS are inherently multipartite and we prove that they are secure not only when a player internal to the task is dishonest, but also when (external) eavesdropping on the quantum channel is allowed. In our first proof-of-principle demonstration of an agile and versatile quantum communication system, the quantum states were distributed at GHz rates. This allows for a one-bit message to be securely signed using our QDS protocols in less than 0.05 ms over a 2 km fiber link and in less than 0.2~s over a 20 km fiber link. To our knowledge, this also marks the first demonstration of a continuous-variable direct QSS protocol.
description: 11+6 pages. 8 figures. Accepted to Physical Review X
Microfinance Credit Rationing and Loan Repayment Performance: A Case of Omo Microfinance Konso Sub Branch
Creators: name: Meshesha, Tenishu
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2014

description: This study was conducted with the aim of analyzing the factors that affect microfinance loan repayment performance, evaluating the loan rationing mechanism and also assessing the impact of the program on the livelihood of borrowers, using primary data collected through structured questionnaire from 203 respondents. The estimation results of the descriptive statistics and the probit model show that education, income, loan supervision, suitability of repayment period, availability of other credit sources and livestock are important and significant factors that enhance the loan repayment performance, while loan diversion and loan size are found to significantly increase loan default. In addition female borrowers were found better in terms of loan repayment. According to these findings the institution is recommended to see into these factors with care and design a better lending strategy. Regarding the loan rationing, borrowers who are literate, loan diverters, support more dependents and earn more income, were disfavored; while those who are older, male, apply for larger loan amounts, own livestock of higher value, perceive supervision as adequate and the repayment period as suitable were favored. The credit scheme was also found to have positive impact in improving the income, education, health and nutritional status of the borrowers as evidenced by the Wilcoxon test that compares the situations before and after participation in the credit scheme. Key Words: microfinance, loan repayment performance, loan diversion, loan rationing, impact, creditworthy
Gravity Degrees of Freedom on a Null Surface
Creators: name: Hopfmüller, Florian
name: Freidel, Laurent
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A canonical analysis for general relativity is performed on a null surface without fixing the diffeomorphism gauge, and the canonical pairs of configuration and momentum variables are derived. Next to the well-known spin-2 pair, also spin-1 and spin-0 pairs are identified. The boundary action for a null boundary segment of spacetime is obtained, including terms on codimension two corners.
description: 28 pages, 3 figures. Second version with minor edits
The conjoint action of stress and water on epoxy-aluminium joints
Creators: name: Thomson, Kevin 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.
Determination of two unknown thermal coefficients through an inverse one-phase fractional Stefan problem
Creators: name: Ceretani, Andrea N.
name: Tarzia, Domingo A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 26A33, 35C05, 35R11, 35R35, 80A22

description: We consider a semi-infinite one-dimensional phase-change material with two unknown constant thermal coefficients among the latent heat per unit mass, the specific heat, the mass density and the thermal conductivity. Aiming at the determination of them, we consider an inverse one-phase Stefan problem with an over-specified condition at the fixed boundary and a known evolution for the moving boundary. We assume that the phase-change process presents latent-heat memory effects by considering a fractional time derivative of order $α$ ($0
description: 20 pages
Impact of Information Technology Investment on Performance of Commercial Banks in Ethiopia
Creators: name: Mezgebu, Dawit
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2017

description: Banking in Ethiopia has undergone remarkable changes since 1991 following the change of government. The era of armchair banking has gone. It has become a different ball game in terms of competition and its inherent strategies. This transition eventually brings the Ethiopian banks to be in need of adopting different technologies. The main aim of this study is to assess the impact of Investment in Information technology on performance of commercial Banks in Ethiopia. In order to fulfill the stated objective a mixed approach with an explanatory research design is used. To this end, the researcher relied on consecutive ten years Annual Audited Financial Report and other relevant n documents of selected eight Commercial Banks in Ethiopia using a purposive sampling method for the period 2006 – 2015. The study employed a multivariate regression model using Return on Asset (ROA), as a dependent variable for measuring the financial performance of the selected Banks and six independent explanatory variables of which three IT investment variables ( hardware, software, and IT service) three control variables ( employee efficiency, market concentration, and inflation). Based on a balanced panel constructed ordinary least squares (OLS) and fixed effects, the study finds that Investment on IT services has a significant and positive impact but investment on hardware and investment on software have negative and significant impact which is inconsistent with the researcher's expectation. The remaining variable, employee efficiency had negative and insignificant effect on performance, similarly market concentration has positive insignificant effect and inflation positive and significant effect. The overall results revealed that IT investment have negative significant impact on the financial performance of commercial Banks in Ethiopia. Hence, based on the findings of the study the researcher concluded that, the negative significant relation between IT investment and financial performance is consistent with the productivity paradox theory for commercial banks in Ethiopia. Finally, as indicated in the scope and limitation section this study was only confined to the three IT investment variables . Hence, the study could be further enhanced by including specific variables . Key words: IT investment, Commercial, ix Bank performance, Panel, Ethiopia.