cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Efficient representation of spatio-temporal data using cylindrical shearlets
Creators: name: Bubba, Tatiana A.
name: Easley, Glenn
name: Heikkilä, Tommi
name: Labate, Demetrio
name: Ayllon, Jose P. Rodriguez
Publisher: name: arXiv
Year: 2021
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 42C10 (primary), 42C40, 92C55, 47A52 (secondary)

description: Efficient representations of multivariate functions are critical for the design of state-of-the-art methods of data restoration and image reconstruction. In this work, we consider the representation of spatio-temporal data such as temporal sequences (videos) of 2- and 3-dimensional images, where conventional separable representations are usually very inefficient, due to their limitations in handling the geometry of the data. To address this challenge, we define a class $\mathcal{E}(A) \subset L^2(\mathbb{R}^4)$ of functions of 4 variables dominated by hypersurface singularities in the first three coordinates that we apply to model 4-dimensional data corresponding to temporal sequences (videos) of 3-dimensional objects. To provide an efficient representation for this type of data, we introduce a new multiscale directional system of functions based on cylindrical shearlets and prove that this new approach achieves superior approximation properties with respect to conventional multiscale representations. We illustrate the advantages of our approach by applying a discrete implementation of the new representation to a challenging problem from dynamic tomography. Numerical results confirm the potential of our novel approach with respect to conventional multiscale methods.
description: 41 pages, 7 figures, 1 table
0-$π$ qubit in one Josephson junction
Creators: name: Guo, Guo-Liang
name: Leng, Han-Bing
name: Hu, Yong
name: Liu, Xin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum states are usually fragile which makes quantum computation being not as stable as classical computation. Quantum correction codes can protect quantum states but need a large number of physical qubits to code a single logic qubit. Alternatively, the protection at the hardware level has been recently developed to maintain the coherence of the quantum information by using symmetries. However, it generally has to pay the expense of increasing the complexity of the quantum devices. In this work, we show that the protection at the hardware level can be approached without increasing the complexity of the devices. The interplay between the spin-orbit coupling and the Zeeman splitting in the semiconductor allows us to tune the Josephson coupling in terms of the spin degree of freedom of Cooper pairs, the hallmark of the superconducting spintronics. This leads to the implementation of the parity-protected 0-$π$ superconducting qubit with only one highly transparent superconductor-semiconductor Josephson junction, which makes our proposal immune from the various fabrication imperfections.
description: 5 pages, 4 figures
Carbon Stars in the Satellites and Halo of M31
Creators: name: Hamren, Katherine
name: Beaton, Rachael L.
name: GuhaThakurta, Puragra
name: Gilbert, Karoline M.
name: Tollerud, Erik J.
name: Boyer, Martha L.
name: Rockosi, Constance M.
name: Smith, Graeme H.
name: Majewski, Steven R.
name: Howley, Kirsten
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We spectroscopically identify a sample of carbon stars in the satellites and halo of M31 using moderate-resolution optical spectroscopy from the Spectroscopic and Photometric Landscape of Andromeda's Stellar Halo survey. We present the photometric properties of our sample of 41 stars, including their brightness with respect to the tip of the red giant branch (TRGB) and their distributions in various color-color spaces. This analysis reveals a bluer population of carbon stars fainter than the TRGB and a redder population of carbon stars brighter than the TRGB. We then apply principal component analysis to determine the sample's eigenspectra and eigencoefficients. Correlating the eigencoefficients with various observable properties reveals the spectral features that trace effective temperature and metallicity. Putting the spectroscopic and photometric information together, we find the carbon stars in the satellites and halo of M31 to be minimally impacted by dust and internal dynamics. We also find that while there is evidence to suggest that the sub-TRGB stars are extrinsic in origin, it is also possible that they are are particularly faint members of the asymptotic giant branch.
description: In print by ApJ
Certified Robustness via Randomized Smoothing over Multiplicative Parameters of Input Transformations
Creators: name: Muravev, Nikita
name: Petiushko, Aleksandr
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Currently the most popular method of providing robustness certificates is randomized smoothing where an input is smoothed via some probability distribution. We propose a novel approach to randomized smoothing over multiplicative parameters. Using this method we construct certifiably robust classifiers with respect to a gamma correction perturbation and compare the result with classifiers obtained via other smoothing distributions (Gaussian, Laplace, uniform). The experiments show that asymmetrical Rayleigh distribution allows to obtain better certificates for some values of perturbation parameters. To the best of our knowledge it is the first work concerning certified robustness against the multiplicative gamma correction transformation and the first to study effects of asymmetrical distributions in randomized smoothing.
The brittle-ductile transition in PVC
Creators: name: Goldyn, Stanley Joseph.
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.
Defects and Metric Anomalies in Föppl-von Kármán Surfaces
Creators: name: Singh, Manish
name: Roychowdhury, Ayan
name: Gupta, Anurag
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: A general framework is developed to study the deformation and stress response in F{ö}ppl-von K{á}rm{á}n shallow shells for a given distribution of defects, such as dislocations, disclinations, and interstitials, and metric anomalies, such as thermal and growth strains. The theory includes dislocations and disclinations whose defect lines can both pierce the two-dimensional surface and lie within the surface. An essential aspect of the theory is the derivation of strain incompatibility relations for stretching and bending strains with incompatibility sources in terms of various defect and metric anomaly densities. The incompatibility relations are combined with balance laws and constitutive assumptions to obtain the inhomogeneous F{ö}ppl-von K{á}rm{á}n equations for shallow shells. Several boundary value problems are posed, and solved numerically, by first considering only dislocations and then disclinations coupled with growth strains.
Determining the Dark Matter distribution in galaxies with Deep Learning
Creators: name: Rios, Martín Emilio de los
name: Petač, Mihael
name: Zaldivar, Bryan
name: Bonaventura, Nina R.
name: Calore, Francesca
name: Iocco, Fabio
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a novel method to infer the Dark Matter (DM) content and spatial distribution within galaxies, based on convolutional neural networks trained within state-of-the-art hydrodynamical simulations (Illustris TNG100). The framework we have developed is capable of inferring the DM mass distribution within galaxies of mass $~10^{11}-10^{13}M_{\odot}$ with very high performance from the gravitationally baryon dominated internal regions to the DM-rich, baryon-depleted outskirts of the galaxies. With respect to traditional methods, the one presented here also possesses the advantages of not relying on a pre-assigned shape for the DM distribution, to be applicable to galaxies not necessarily in isolation, and to perform very well even in the absence of spectroscopic observations
description: Matches published version
Classical spin liquid instability driven by off-diagonal exchange in strong spin-orbit magnets
Creators: name: Rousochatzakis, Ioannis
name: Perkins, N. B.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We show that the off-diagonal exchange anisotropy drives Mott insulators with strong spin-orbit coupling to a classical spin liquid regime, characterized by an infinite number of ground states and Ising variables living on closed or open strings. Depending on the sign of the anisotropy, quantum fluctuations either fail to lift the degeneracy down to very low temperatures, or select non-collinear magnetic states with unconventional spin correlations. The results apply to all 2D and 3D tri-coordinated materials with bond-directional anisotropy, and provide a consistent interpretation of the suppression of the x-ray magnetic circular dichroism signal reported recently for $β$-Li$_2$IrO$_3$ under pressure.
Prediction and manipulation of hydrodynamic rogue waves via nonlinear spectral engineering
Creators: name: Tikan, Alexey
name: Bonnefoy, Felicien
name: Roberti, Giacomo
name: El, Gennady
name: Tovbis, Alexander
name: Ducrozet, Guillaume
name: Cazaubiel, Annette
name: Prabhudesai, Gaurav
name: Michel, Guillaume
name: Copie, Francois
name: Falcon, Eric
name: Randoux, Stephane
name: Suret, Pierre
Publisher: name: arXiv
Year: 2021
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Peregrine soliton (PS) is widely regarded as a prototype nonlinear structure capturing properties of rogue waves that emerge in the nonlinear propagation of unidirectional wave trains. As an exact breather solution of the one-dimensional focusing nonlinear Schrödinger equation with nonzero boundary conditions, the PS can be viewed as a soliton on finite background, i.e. a nonlinear superposition of a soliton and a monochromatic wave. A recent mathematical work showed that both nonzero boundary conditions and solitonic content are not pre-requisites for the PS occurrence. Instead, it has been demonstrated that PS can emerge locally, as an asymptotic structure arising from the propagation of an arbitrary large decaying pulse, independently of its solitonic content. This mathematical discovery has changed the widely accepted paradigm of the solitonic nature of rogue waves by enabling the PS to emerge from a partially radiative or even completely solitonless initial data. In this work, we realize the mathematically predicted universal mechanism of the local PS emergence in a water tank experiment with a particular aim to control the point of the PS occurrence in space-time by imposing an appropriately chosen initial chirp. By employing the inverse scattering transform for the synthesis of the initial data, we are able to engineer a localized wave packet with a prescribed solitonic and radiative content. This enabled us to control the position of the emergence of the rogue wave by adjusting the inverse scattering spectrum. The proposed method of the nonlinear spectral engineering is found to be robust to higher-order nonlinear effects inevitable in realistic wave propagation conditions.
Akzeptanz von Bildungstechnologien in der gewerblich-technischen Berufsbildung vor dem Hintergrund von Industrie 4.0
Creators: name: Eder, Alexandra
Publisher: name: Journal of Technical Education (JOTED)
Year: 2015

description: Die Industriebetriebe in Deutschland wandeln sich - so die Prognose und die Forschungsagenda der Bundesregierung - mittelfristig zu international wettbewerbsfähigen „Smarten Fabriken“, in denen das Internet die Facharbeiter(innen) bei der allumfassenden und standortübergreifenden Prozessoptimierung unterstützen. Die Bildungstechnologien - so die Annahme - nehmen hierbei eine zentrale Position ein. Empirische Studien belegen jedoch eine verbesserungswürdige Akzeptanz im Bildungssystem. Die (gewerblich-technische) Berufsbildung betreffend herrscht hier zudem ein gravierendes Forschungsdesiderat bezüglich der Nutzung der digitalen Medien. Technologie-Akzeptanzmodelle erscheinen hier eine geeignete theoretische und empirische Fundierung für die weiterführende Forschung zu bieten. Dieser Beitrag skizziert und diskutiert die oben genannten Sachverhalte und fokussiert dabei primär die Situation am schulischen Lernort der beruflichen Bildung. Schlüsselwörter: Technologie Akzeptanz, UTAUT, Industrie 4.0, Implementierung digitaler Medien, gewerblich-technische Domäne
description: Journal of Technical Education (JOTED), Bd. 3 Nr. 2 (2015): Journal of Technical Education (JOTED)
Is the Multigrid Method Fault Tolerant? The Multilevel Case
Creators: name: Ainsworth, Mark
name: Glusa, Christian
Publisher: name: arXiv
Year: 2016
Subjects: subject: Numerical Analysis (math.NA)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 65F10, 65N22, 65N55, 68M15

description: Computing at the exascale level is expected to be affected by a significantly higher rate of faults, due to increased component counts as well as power considerations. Therefore, current day numerical algorithms need to be reexamined as to determine if they are fault resilient, and which critical operations need to be safeguarded in order to obtain performance that is close to the ideal fault-free method. In a previous paper, a framework for the analysis of random stationary linear iterations was presented and applied to the two grid method. The present work is concerned with the multigrid algorithm for the solution of linear systems of equations, which is widely used on high performance computing systems. It is shown that the Fault-Prone Multigrid Method is not resilient, unless the prolongation operation is protected. Strategies for fault detection and mitigation as well as protection of the prolongation operation are presented and tested, and a guideline for an optimal choice of parameters is devised.
description: 25 pages, 10 figures
Braiding higher-order Majorana corner states through their spin degree of freedom
Creators: name: Pan, Xiao-Hong
name: Luo, Xun-Jiang
name: Gao, Jin-Hua
name: Liu, Xin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: In this work, we study the spin texture of a class of higher-order topological superconductors (HOTSC) and show how it can be used to detect and braid Majorana corner modes (MCMs). This class of HOTSC is composed of two-dimensional topological insulators with s-wave superconductivity and in-plane magnetic fields, which offers advantages in experimental implementation. The spin polarization of the MCMs in this class is perpendicular with the applied magnetic field direction and is opposite on intrinsic orbitals, resulting in an overall ferrimagnetic spin texture. As a result, we find that the spin-selective Andreev reflection can be observed in a transverse instead of parallel direction to the applied magnetic field. Meanwhile, this spin texture leads to the gate-tunable $4π$ periodic $ϕ_0$ Josephson current that performs qualitatively different behavior from the topologically trivial $ϕ_0$-junction under rotating the in-plane magnetic field. Meanwhile, the existence of the MCMs in this class does not depend on the in-plane magnetic field direction. This gives rise to great advantage in constructing all electronically controlled Majorana network for braiding, which is confirmed through our numerical simulation. We thus provide a comprehensive scheme for probing non-Abelian statistics in this class of HOTSCs.
description: 6 pages, 4 figures
Can the Monetary Authority Control the Stock of Money Supply in Ethiopia An Empirical Investigation
Creators: name: Desalegn, Gashaw
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2014

description: The aim of this paper is to investigate empirically the ability of Nation Bank of Ethiopia to control the stock of money supply. This investigation seems to conform to the ongoing controversy surrounding the exogeneity /endogeneity hypothesis regarding the money supply i.e. the controllability/non-controllability of the money supply by the Central Bank. The paper has first tested the money multiplier model which says money is exogenous and thus controllable by central banks. We examine the constancy and Stationarity of the money multiplier and the results suggest that the money multiplier remains non stationary for the entire sample period. We then tested cointegration between money supply and monetary base and find the evidence of cointegration between two variables. The coefficient restrictions are satisfied only partially. The result from this model shows it will be difficult to use the money multiplier model as a frame work for monetary policy. The paper attempted to test the post-Keynesian hypothesis of endogenous money for Ethiopia using Granger Causality test. We have found that at all level of lag lengths credit causes broad money but at higher lag length broad money do not cause credit in the sample period. Though the result seems gloomy the endogeneity of money supply is strong.
Editorial: Bedingungsvariablen der Ausbildung 4.0 - Ausbildung der Zukunft
Creators: name: Zinn, Bernd
Publisher: name: Journal of Technical Education (JOTED)
Year: 2015

description: Unter der Thematik Industrie 4.0 wird allgemein „der flächendeckende Einzug von Informations- und Kommunikationstechniken sowie deren Vernetzung zu einem Internet der Dinge, Dienste und Daten, das eine Echtzeitfähigkeit der Produktion ermöglicht“, verstanden (vgl. z. B. Spath et al. 2013, S. 2). In vielen nationalen und internationalen Unternehmen wird die Thematik derzeit intensiv diskutiert...
description: Journal of Technical Education (JOTED), Bd. 3 Nr. 2 (2015): Journal of Technical Education (JOTED)
The Impact of Foreign Aid on Government Expenditure in Ethiopia: An Application of Vector Error Correction Model
Creators: name: Mohammed, Abas
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2014

description: Foreign aid represents an important source of finance in most countries in sub-Saharan Africa (SSA), where it increases government's expenditure, supplements low savings, narrow export earnings and thin tax bases. In this paper, a welfare utility maximization function is used and the necessary diagnostic tests undertaken to determine how government spending respond to aid flows. It employs a co-integrated error correction model to account for potential endogeneity and non-Stationarity problems. The empirical results indicate that the flow of foreign aid does influence government spending patterns. It supports the hypothesis that in Ethiopia, during 1966 – 2013, foreign Aid has a positive effect on total government expenditure. Foreign aid is fungible in Ethiopia, it flows to unintended purpose. Disaggregating the data into capital and non- development expenditures, like general service expenditure and defense expenditure, the relationship has been examined. Capital expenditure is positively and significantly affected by foreign Aid and also Foreign Aid finances Non- developmental Expenditures. The study also provides evidence that policy change increases total and capital expenditures significantly. Taking into account Foreign aid influences government expenditures positively the government has to design effective strategy that enhances flow of foreign aid to the capital expenditure and protecting from non-developmental sectors.
Nonlinear radiation gauge for near Kerr spacetimes
Creators: name: Andersson, Lars
name: Bäckdahl, Thomas
name: Blue, Pieter
name: Ma, Siyuan
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Analysis of PDEs (math.AP)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 35Q76, 83C57, 83C60, 35F55

description: In this paper, we introduce and explore the properties of a new gauge choice for the vacuum Einstein equation inspired by the ingoing and outgoing radiation gauges (IRG, ORG) for the linearized vacuum Einstein equation introduced by Chrzanowski in his work on metric reconstruction [DOI:10.1103/PhysRevD.11.2042] on the Kerr background. It has been shown by Price, Shankar and Whiting [arXiv:gr-qc/0611070] that the IRG/ORG are consistent gauges for the linearized vacuum Einstein equation on Petrov type II backgrounds. In [arXiv:1903.03859], the ORG was used in proving linearized stability for the Kerr spacetime, and the new non-linear radiation gauge introduced here is a direct generalization of that gauge condition, and is intended to be used to study the stability of Kerr black holes under the evolution generated by the vacuum Einstein equation.
description: 38 pages. Section 5 rewritten. To appear in Communications in Mathematical Physics
A Novel Approach for Shot Boundary Detection in Videos
Creators: name: Guru, D. S.
name: Suhil, Mahamad
name: Lolika, P.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: This paper presents a novel approach for video shot boundary detection. The proposed approach is based on split and merge concept. A fisher linear discriminant criterion is used to guide the process of both splitting and merging. For the purpose of capturing the between class and within class scatter we employ 2D2 FLD method which works on texture feature of regions in each frame of a video. Further to reduce the complexity of the process we propose to employ spectral clustering to group related regions together to a single there by achieving reduction in dimension. The proposed method is experimentally also validated on a cricket video. It is revealed that shots obtained by the proposed approach are highly cohesive and loosely coupled
description: 12 pages, 2 figures, 2 tables; Conference: Multimedia Processing, Communication and Computing Applications, 2012
Editorial: Conditional variables of ‘Ausbildung 4.0’ - Vocational education for the future
Creators: name: Zinn, Bernd
Publisher: name: Journal of Technical Education (JOTED)
Year: 2015

description: The subject matter of Industrie 4.0 is generally understood to be "the comprehensive introduction of computer- and communications technicians, and their connection to an Internet network of things, services and data, which makes possible a real-time capability for production," (cf., e.g., Spath et al. 2013, p. 2). This topic is currently the subject of intensive discussions at many national and international businesses...
description: Journal of Technical Education (JOTED), Bd. 3 Nr. 2 (2015): Journal of Technical Education (JOTED)
Seroprevalence of Helicobacter Pylori Infection and its Risk Factors Among Adult Patients With Dyspepsia in Hawassa Teaching and Referral Hospital, South Ethiopia
Creators: name: Alemayehu, Alem
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2011

description: Background: Helicobacter pylori is a curved gram-negative bacteria which causes gastritis and peptic ulcer disease. It is also an important risk factor for the development of gastric cancer and mucosal associated lymphoid tissue lymphoma. Many studies revealed that the prevalence of Helicobacter pylori infection varies with geographical region, socio demographic characteristics and environmental conditions of the studied population. In addition, it is more frequent in dyspeptic patients than normal individuals and dyspeptic symptoms accounts 10% of hospital admission in Ethiopia. Objective: The main objective was to determine the seroprevalence of Helicobacter pylori infection and its risk factors in adult patients with dyspepsia. Methods: A case control study was conducted between December 2010 and February 2011 on a total of 106 patients at Hawassa Teaching and Referral Hospital, South Ethiopia. The presence of antibody against Helicobacter pylori was determined serologically and a face to face interview was taken to assess the contributing factors for the infection. Ethical clearance and informed consents were obtained before data collection. Logistic regression was used to estimate odds ratio (crude and adjusted with 95% confidence interval) of positive responses to the different risk factors. Comparison between groups was compared with Chi-square and a P-value of <0.05 was considered significant. Results: Of the total 106 participants, 54 (51%) were male and 52(49%) female with mean age 32 years, range 18-75 years. Of these the seropositivity for Helicobacter pylori infection was found in 37(70%) of 53 dyspeptic patients (95% CI, 55.7% - 81.7%) and 29(54%) of 53 non dyspeptic participants (95% CI, 40.4% - 68.4%) p >0.05). The seroprevalence in participants that have family size > 5 was 71.4 %( 45/63) and 48.8 %( 21/43) for family size < 5 (AOR=2.6 (3.97- 7.127) p<0.05). Conclusion: There was a considerable increase of Helicobacter pylori seroprevalence in dyspeptic patients than the non dyspeptics i.e. 70% versus 54%. Among all variables, over crowding was positively associated Helicobacter pylori infection.
Comparison of glass fibre reinforced dough moulding compound with aramid reinforced dough moulding compound of injection moulded specimens with compression moulded specimens
Creators: name: Foster, Mark.
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.
Idealized 2D Cloud-Resolving Simulations for Tidally Locked Habitable Planets
Creators: name: Song, Qiyu
name: Yang, Jun
name: Luo, Hang
name: Li, Cheng
name: Fu, Shizuo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Cloud is critical for planetary climate and habitability, but it is also one of the most challenging parts of studying planets in and beyond the solar system. Here we use a cloud-resolving model (CRM) with high resolution (2 km) in a two-dimensional (2D) configuration to simulate the clouds and circulation on tidally locked aqua-planets. We find that the substellar area is covered by deep convective clouds, the nightside is dominated by low-level clouds, and these two are linked by a global-scale Walker circulation. We further find that a uniform surface warming causes the substellar cloud width to decrease, but a reduction in day-night surface temperature contrast or an increase in longwave radiative cooling rate causes the substellar cloud width to increase. These relationships can be roughly interpreted based on simple thermodynamic theories. Comparing the results between CRM and global 3D general circulation model (GCM), we find that they show qualitatively consistent results, including the Walker circulation, the substellar clouds, and the responses of the substellar ascending area and strength to changes in surface temperature or in its zonal contrast. But, large quantitative differences exist, such as the magnitude of cloud water path, the cloud width, and their responses to external forcings. These results increase our confidence in using GCMs for modeling exoplanetary climates, although large quantitative uncertainties should always exist. Future work is required to use 3D CRM(s) with realistic radiative transfer and with the Coriolis force to examine the clouds and climate of tidally locked planets.
description: 32 pages, 20 figures
Towards Automated Performance Bug Identification in Python
Creators: name: Tsakiltsidis, Sokratis
name: Miranskyy, Andriy
name: Mazzawi, Elie
Publisher: name: arXiv
Year: 2016
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Context: Software performance is a critical non-functional requirement, appearing in many fields such as mission critical applications, financial, and real time systems. In this work we focused on early detection of performance bugs; our software under study was a real time system used in the advertisement/marketing domain. Goal: Find a simple and easy to implement solution, predicting performance bugs. Method: We built several models using four machine learning methods, commonly used for defect prediction: C4.5 Decision Trees, Na\"ıve Bayes, Bayesian Networks, and Logistic Regression. Results: Our empirical results show that a C4.5 model, using lines of code changed, file's age and size as explanatory variables, can be used to predict performance bugs (recall=0.73, accuracy=0.85, and precision=0.96). We show that reducing the number of changes delivered on a commit, can decrease the chance of performance bug injection. Conclusions: We believe that our approach can help practitioners to eliminate performance bugs early in the development cycle. Our results are also of interest to theoreticians, establishing a link between functional bugs and (non-functional) performance bugs, and explicitly showing that attributes used for prediction of functional bugs can be used for prediction of performance bugs.
Inexact Restoration for Minimization with Inexact Evaluation both of the Objective Function and the Constraints
Creators: name: Bueno, L. F.
name: Larreal, F.
name: Martínez, J. M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 90C30, 65K05, 49M37, 90C60, 68Q25

description: In a recent paper an Inexact Restoration method for solving continuous constrained optimization problems was analyzed from the point of view of worst-case functional complexity and convergence. On the other hand, the Inexact Restoration methodology was employed, in a different research,to handle minimization problems with inexact evaluation and simple constraints. These two methodologies are combined in the present report, for constrained minimization problems in which both the objective function and the constraints, as well as their derivatives, are subject to evaluation errors. Together with a complete description of the method, complexity and convergence results will be proved.
description: 38 pages, Math. Comp., 2023
On a formal equivalence between electro-magnetic waves in cold plasma and shallow water inertio-gravity waves
Creators: name: Heifetz, Eyal
name: Maas, Leo R. M.
name: Mak, Julian
name: Pomerantz, Ishay
Publisher: name: arXiv
Year: 2021
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The fundamental dispersion relation of transverse electro-magnetic waves in a cold collisionless plasma is formally equivalent to the two dimensional dispersion relation of inertio-gravity waves in a rotating shallow water system, where the Coriolis frequency can be identified with the plasma frequency, and the shallow water gravity wave phase speed plays the role of the speed of light. Here we examine this formal equivalence in the governing linearised equations, and compare between the propagation wave mechanisms in these seemingly unrelated physical systems.
description: 13 pages, 5 figures; submitted to Journal of Plasma Physics
Survival status and predictors of mortality among acute leukemia patients attending adult hematology oncology ward at Tikur Anbessa Specialized hospital, Addis Abeba,Ethiopia,2019.
Creators: name: Balta, Bargude
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2019

description: Background: Leukemia ranked tenth for cancer incidence and ninth for cancer deaths in the world. More than 78% of leukemia occurred in developing country and only 22% in developed countries. However, there is limited information that shows survival status and factors associated with death of adult acute leukemia patients in Ethiopia. Objectives: the aim of this study was to determine survival status and determinant factors of acute Leukemia at Tikur Anbessa specialized hospital March to April 2019. Methods: A five year retrospective cohort study was conducted involving all patients seen from January 2014 to December 2018. Patient's charts were reviewed between Marchs to April 2019. The data was analyzed using SPSS version 25.0. Kaplan–Meier Log-rank model was used to estimate the survival time of acute leukemia patients based on explanatory variables. Bivariate and multivariate Cox proportional hazards regression models was performed to identify the independent factors for mortality. Result: Overall survival probability of acute leukemia was 0.21 and the median survival was 35 months with median follow-up of 17 months. Acute leukemia subtypes (HR: 4.9, 95% CI: 2.3-10.4,P value <0.00),history of relapse (HR: 3.9, 95% CI: 1.0-7.9, P< 0.002), age (HR:1.25,95% CI: 1-1.75,p<0.01),Hepatomegaly(HR:2.7, 95% CI: 1.36-5.36 , p<0.004) and splenomegaly (HR:2.29 95% CI: 11.2-4.4 ,p<0.014were determinant factors of the acute leukemia mortality. Conclusion: Survival rate of acute leukemia patients in this study was very low as compared to other studies conducted in the developing as well as developed world. Advanced age, history of relapse, hepatomegaly, splenomegaly and leukemia subtype are determinant factors for acute leukemia. Strengthening cancer care centers, improving community awareness, timely diagnosis and treatment may be necessary to increase patient survival.
Hybrid quantum magnetic field sensor with an electron spin and a nuclear spin in diamond
Creators: name: Matsuzaki, Yuichiro
name: Shimooka, Takaaki
name: Tanaka, Hirotaka
name: Tokura, Yasuhiro
name: Semba, Kouichi
name: Mizuochi, Norikazu
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Recently, magnetic field sensors based on an electron spin of a nitrogen vacancy (NV) center in diamond have been studied both from an experimental and theoretical point of view. This system provides a nanoscale magnetometer, and it is possible to detect a precession of a single spin. In this paper, we propose a sensor consisting of an electron spin and a nuclear spin in diamond. Although the electron spin has a reasonable interaction strength with magnetic field, the coherence time of the spin is relatively short. On the other hand, the nuclear spin has a longer life time while the spin has a negligible interaction with magnetic fields. We show that, through the combination of such two different spins via the hyperfine interaction, it is possible to construct a magnetic field sensor with the sensitivity far beyond that of previous sensors using just a single electron spin.
Editorial: 3 Years of JOTED - A Status Report from the Publisher
Creators: name: Tenberg, Ralf
Publisher: name: Journal of Technical Education (JOTED)
Year: 2015

description: The Journal of Technical Education was developed in 2013 as part of a collaboration between the Universities of Stuttgart and Darmstadt, and first appeared in the fall of 2013. The starting point at that time was a comprehensive search of international journals with an emphasis in technical and vocational higher education pedagogy, for which - especially in German-speaking countries - a publication desideratum was clear: First, this search was to determine whether scientific publications were underrepresented in this subject area, and second, whether such work appeared in journals in which they constituted the core areas or on the sidelines, or in non-periodical publications (conference proceedings and anthologies, "gray" literature, ...). The central idea for JOTED was and is to create a quality platform for this transdisciplinary research area and to bundlie and communicate scientific approaches and findings while also contributing to the formation of the field’s identity. In its core alignment with technical teachng JOTED is focused on the scientific exchange of research results in the related fields of engineering and applied science education, and is aimed at academics as well as teachers. The journal aims to integrate general, vocational and academic areas of expertise in the context of technical and scientific points of reference, while didactic and sociological aspects such as psychology, history and philosophy are also embraced...
description: Journal of Technical Education (JOTED), Bd. 3 Nr. 1 (2015): Journal of Technical Education (JOTED)
The Temporal Rich Club Phenomenon
Creators: name: Pedreschi, Nicola
name: Battaglia, Demian
name: Barrat, Alain
Publisher: name: arXiv
Year: 2021
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: Identifying the hidden organizational principles and relevant structures of networks representing complex physical systems is fundamental to understand their properties. To this aim, uncovering the structures involving a network's prominent nodes in a network is an effective approach. In temporal networks, the simultaneity of connections is crucial for temporally stable structures to arise. We thus propose here a novel measure to quantitatively investigate the tendency of well connected nodes to form simultaneous and stable structures in a temporal network. We refer to this tendency, when observed, as the "temporal rich club phenomenon". We illustrate the interest of this concept by analyzing diverse data sets under this lens, and showing how it enables a new perspective on their temporal patterns, from the role of cohesive structures in relation to processes unfolding on top of the network to the study of specific moments of interest in the evolution of the network.
Knowledge And Attitude Towards Care Of Elder Patients And Associated Factors Among Nurses Working In Adult Acute Care Units In Selected Governmental Hospitals Of Addis Ababa, Ethiopia, 2018
Creators: name: Tamiru, Sanbato
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2018

description: The percentage of aged population 60 years and above is globally increasing. Quality of nursing care provided to elder people depends on nurse's knowledge and attitude. Knowledge regarding care of patient investigated in a few studies showed that nurses have low to average knowledge with the care of elder patient. Most of the studies across nation revealed negative attitude toward care of elder patient. In Ethiopia, the problems of older people had not addressed adequately. To date, no similar study has conducted in Ethiopia in concerning nurse's knowledge and attitude toward care of elder patient. Objective: To assess knowledge, attitude and associated factors toward care of elder patient among nurses working in adult acute care unit in selected public hospital of Addis Ababa, Ethiopia, 2018. Methods: Institution based cross-sectional study employed using quantitative descriptive study on 457 nurses in five selected government hospital in Addis Ababa. Multi stage sampling and simple random sampling techniques were employed to select the study subjects. Structured self-administered questionnaire was used to collect data. Results: Among 457 respondents, 131(28.7%) of nurses' have good knowledge toward care of elder patient whereas 100(21.9%) nurses have positive attitude toward care of elder patient. The result showed that age and year of experience were significantly associated with nurse's knowledge toward care of elder patient (p<0.05, 95% C.I). Similarly, sex, marital status, level of education, year of experience in nursing profession, adequacy of physical space, communicating with patient/family care giver and nurse's knowledge were significantly associated with nurse's attitude toward care of elder patient (p<0.05, 95% C. I). Conclusion and Recommendation: Majority of nurses had poor knowledge and negative attitude toward care of elder patient. Age and year of experience were significantly associated with knowledge. Similarly, sex, marital status, level of education, year of experience, adequacy of physical space, communicating with patient/family care giver and nurse's knowledge of care of elder patient were significantly associated with nurse's attitude toward care of elder patient (p<0.05, 95% C.I). Therefore, federal ministry of health, hospital managers and nursing department should work cooperatively in order to improve nurse's knowledge and enhance their attitude toward care of elder patient.
Wireless Sensors Networks for Internet of Things
Creators: name: Khalil, Nacer
name: Abid, Mohamed Riduan
name: Benhaddou, Driss
name: Gerndt, Michael
Publisher: name: arXiv
Year: 2016
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: The Internet is smoothly migrating from an Internet of people towards an Internet of Things (IoT). By 2020, it is expected to have 50 billion things connected to the Internet. However, such a migration induces a strong level of complexity when handling interoperability between the heterogeneous Inter- net things, e.g., RFIDs (Radio Frequency Identification), mobile handheld devices, and wireless sensors. In this context, a couple of standards have been already set, e.g., IPv6, 6LoWPAN (IPv6 over Low power Wireless Personal Area Networks), and M2M (Machine to Machine communications). In this paper, we focus on the integration of wireless sensor networks into IoT, and shed further light on the subtleties of such integration. We present a real-world test bed deployment where wireless sensors are used to control electrical appliances in a smart building. Encountered problems are highlighted and suitable solutions are presented.
description: 2014 IEEE Ninth International Conference on Intelligent Sensors, Sensor Networks and Information Processing (ISSNIP) Symposium on Public Internet of Things
Mass-Loss Rates of "Hot-Jupiter" Exoplanets with Various Types of Gaseous Envelopes
Creators: name: Cherenkov, A. A.
name: Bisikalo, D. V.
name: Kaigorodov, P. V.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: According to the computations results obtained by Bisikalo et al. (2013b) for the gas-dynamical effect of stellar winds on exoplanet atmospheres, three types of gaseous envelopes can form around hot Jupiters: closed, quasi-closed, and open. The type of envelope that forms depends on the position of the frontal collision point (where the dynamical pressure of the wind is equal to the pressure of the surrounding atmosphere) relative to the Roche-lobe boundaries. Closed envelopes are formed around planets whose atmospheres lie completely within their Roche lobes. If the frontal collision point is located outside the Roche lobe, the atmospheric material begins to flow out through the Lagrangian points $\mathrm{L_1}$ and $\mathrm{L_2}$, which can result in the formation of quasi-closed (if the dynamical pressure of the stellar wind stops the outflow through $\mathrm{L_1}$) or open gaseous envelopes. The example of the typical hot Jupiter HD 209458 b is considered for four sets of atmospheric parameters, to determine the mass-loss rates for the different types of envelopes arising with these parameters. The mass-loss rates based on the modeling results were estimated to be $\dot{M} \leq 10^{9}$ g/s for a closed atmosphere, $\dot{M} \simeq 3 \times 10^{9}$ g/s for a quasi-closed atmosphere, and $\dot{M} \simeq 3 \times 10^{10}$ g/s for an open atmosphere. The matter in the closed and quasi-closed atmospheres flows out mainly through $\mathrm{L_2}$, and the matter in open envelopes primarily through $\mathrm{L_1}$.
description: 12 pages, 8 figures
Neuron-level Interpretation of Deep NLP Models: A Survey
Creators: name: Sajjad, Hassan
name: Durrani, Nadir
name: Dalvi, Fahim
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: The proliferation of deep neural networks in various domains has seen an increased need for interpretability of these models. Preliminary work done along this line and papers that surveyed such, are focused on high-level representation analysis. However, a recent branch of work has concentrated on interpretability at a more granular level of analyzing neurons within these models. In this paper, we survey the work done on neuron analysis including: i) methods to discover and understand neurons in a network, ii) evaluation methods, iii) major findings including cross architectural comparisons that neuron analysis has unraveled, iv) applications of neuron probing such as: controlling the model, domain adaptation etc., and v) a discussion on open issues and future research directions.
description: 17 pages
Mitochondrial Ca2+ uptake in skeletal muscle health and disease
Creators: name: Zhou, Jingsong
name: Dhakal, Kamal
name: Yi, Jianxun
Publisher: name: arXiv
Year: 2016
Subjects: subject: Biomolecules (q-bio.BM)
subject: Biological Physics (physics.bio-ph)
subject: Subcellular Processes (q-bio.SC)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Muscle uses Ca2+ as a messenger to control contraction and relies on ATP to maintain the intracellular Ca2+ homeostasis. Mitochondria are the major sub-cellular organelle of ATP production. With a negative inner membrane potential, mitochondria take up Ca2+ from their surroundings, a process called mitochondrial Ca2+ uptake. Under physiological conditions, Ca2+ uptake into mitochondria promotes ATP production. Excessive uptake causes mitochondrial Ca2+ overload, which activates downstream adverse responses leading to cell dysfunction. Moreover, mitochondrial Ca2+ uptake could shape spatio-temporal patterns of intracellular Ca2+ signaling. Malfunction of mitochondrial Ca2+ uptake is implicated in muscle degeneration. Unlike non-excitable cells, mitochondria in muscle cells experience dramatic changes of intracellular Ca2+ levels. Besides the sudden elevation of Ca2+ level induced by action potentials, Ca2+ transients in muscle cells can be as short as a few milliseconds during a single twitch or as long as minutes during tetanic contraction, which raises the question whether mitochondrial Ca2+ uptake is fast and big enough to shape intracellular Ca2+ signaling during excitation-contraction coupling and creates technical challenges for quantification of the dynamic changes of Ca2+ inside mitochondria. This review focuses on characterization of mitochondrial Ca2+ uptake in skeletal muscle and its role in muscle physiology and diseases.
Design of dual-processor level 2 terminal for CCITT common channel signalling system no.7
Creators: name: Subocz, Mikolaj.
Publisher: name: Monash University
Year: 2022

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