cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
التكامل الاقتصادي العربي بين ضرورات التحول الرقمي ومواجهة السياسات التجارية الحمائية الجديدة في ظل تداعيات جائحة كورونا
Creators: name: Ghaoues, Soufiane
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 380103
subject: Economic history
classificationCode: 380110
subject: International economics

description: تهدف هذه الدراسة إلى إبراز التحديات التي تواجه التكامل الاقتصادي العربي، كنتيجة للتحولات الاقتصادية العالمية وما أفرزته مختلف السياسات التجارية الجديدة من تنامي للنزعات الحمائية و الحروب التجارية. كما تتناول هذه الدراسة تأثير جائحة كوفيد 19 على آفاق التكامل الاقتصادي بين الدول العربية. ومن ثم تجري تقييما للكيفية التي أدت بها الجائحة إلى تسريع الرقمنة والآثار المترتبة على تكامل هذه الدول. أظهرت نتائج الدراسة إلى أن التكامل الاقتصادي ضروري لتحقيق التنمية المستدامة في الدول العربية، ولاسيما في سياق الأزمات. إذ يمكن للتكامل الإقليمي، عندما يصمم وينفذ في إطار إستراتيجية إنمائية أوسع تواكب تنامي الاقتصاد الرقمي الجديد، أن يعزز التنوع الاقتصادي والتغييرات الهيكلية للاقتصاديات العربية ويحقق ويحسن القدرة التنافسية وأن يكون بمثابة منطلق لمشاركة الاقتصاديات العربية مشاركة فعالة في الاقتصاد العالمي.
Not one liners : narrative painting in contemporary art
Creators: name: Cyrulla, Dagmar.
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.
Super-sample covariance of the power spectrum, bispectrum, halos, voids, and their cross covariances
Creators: name: Bayer, Adrian E.
name: Liu, Jia
name: Terasawa, Ryo
name: Barreira, Alexandre
name: Zhong, Yici
name: Feng, Yu
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study the effect of super-sample covariance (SSC) on the power spectrum and higher-order statistics: bispectrum, halo mass function, and void size function. We also investigate the effect of SSC on the cross covariance between the statistics. We consider both the matter and halo fields. Higher-order statistics of the large-scale structure contain additional cosmological information beyond the power spectrum and are a powerful tool to constrain cosmology. They are a promising probe for ongoing and upcoming high precision cosmological surveys such as DESI, PFS, Rubin Observatory LSST, Euclid, SPHEREx, SKA, and Roman Space Telescope. Cosmological simulations used in modeling and validating these statistics often have sizes that are much smaller than the observed Universe. Density fluctuations on scales larger than the simulation box, known as super-sample modes, are not captured by the simulations and in turn can lead to inaccuracies in the covariance matrix. We compare the covariance measured using simulation boxes containing super-sample modes to those without. We also compare with the Separate Universe approach. We find that while the power spectrum, bispectrum and halo mass function show significant scale- or mass-dependent SSC, the void size function shows relatively small SSC. We also find significant SSC contributions to the cross covariances between the different statistics, implying that future joint-analyses will need to carefully take into consideration the effect of SSC. To enable further study of SSC, our simulations have been made publicly available at https://github.com/HalfDomeSims/ssc.
description: 9+2 pages, 4 figures
Rüdiger Weißbach: Strategien betrieblicher Informatisierung und die Diffusion von ISDN, Materialien und Berichte des IUK-Instituts, Dortmund: BWV, 2000, ISBN 3-924100-25 X, 6 u. 286 S., 43,00 Euro
Creators: name: Urdze, Sigita
Publisher: name: Lucius & Lucius Verlagsgesellschaft
Year: 2011
Subjects: subject: 300
subject: 650

description: Arbeit
Black hole clustering and duty cycles in the Illustris simulation
Creators: name: DeGraf, Colin
name: Sijacki, Debora
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We use the high-resolution cosmological simulation Illustris to investigate the clustering of supermassive black holes across cosmic time, the link between black hole clustering and host halo masses, and the implications for black hole duty cycles. Our predicted black hole correlation length and bias match the observational data very well across the full redshift range probed. Black hole clustering is strongly luminosity-dependent on small, 1-halo scales, with some moderate dependence on larger scales of a few Mpc at intermediate redshifts. We find black hole clustering to evolve only weakly with redshift, initially following the behaviour of their hosts. However below z ~ 2 black hole clustering increases faster than that of their hosts, which leads to a significant overestimate of the clustering-predicted host halo mass. The full distribution of host halo masses is very wide, including a low-mass tail extending up to an order of magnitude below the naive prediction for minimum host mass. Our black hole duty cycles follow a power-law dependence on black hole mass and decrease with redshift, and we provide accurate analytic fits to these. The increase in clustering amplitude at late times, however, means that duty cycle estimates based on black hole clustering can overestimate duty cycles substantially, by more than two orders of magnitude. We find the best agreement when the minimum host mass is assumed to be $10^{11.2} M_\odot$ , which provides an accurate measure across all redshifts and luminosity ranges probed by our simulation.
description: 15 pages, 14 figures; MNRAS accepted
Synthesis of sulfur-containing polycarbonate block copolymers via Salen-metal catalyzed copolymerization of CO2, propylene oxide, and phthalic thioanhydride
Creators: name: Lu, Shujuan
name: Ge, Qingyun
name: Fan, Chaogang
name: Wang, Xinqiang
name: Chen, Yunqi
name: Lin, Shaohui
name: Pan, Qinmin
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biochemistry
subject: Medicine
classificationCode: 39999
subject: Chemical Sciences not elsewhere classified
classificationCode: 69999
subject: Biological Sciences not elsewhere classified
subject: Computational Biology

description: Sulfur-containing ABA-type polycarbonate triblock copolymers were synthesized via sequential copolymerization of propylene oxide (PO) and carbon dioxide (CO2), followed by propylene oxide (PO) and phthalic thioanhydride (PTA) in the presence of water and Salen-Metal catalysts. The reaction was catalyzed using Salen-Co(III)-Cl/[PPN]Cl and Salen-Cr(III)-Cl/[PPN]Cl catalyst systems. The content of thioester units in the copolymer chain could be adjusted by varying the feed ratios of PTA. These triblock polymers displayed a higher refractive index, reaching up to 1.561.
Ulrich Pekruhl: Partizipatives Management. Konzepte und Kulturen, Arbeit und Technik, Bd. 19, München/Mering: Rainer Hampp Verlag, 2001, ISBN 3-87988-559-1, 2 u. 302 S., DM 53,20, EUo 27,20
Creators: name: Röttger, Bernd
Publisher: name: Lucius & Lucius Verlagsgesellschaft
Year: 2011
Subjects: subject: 300
subject: 650

description: Arbeit
Effect of Service Quality on Student Satisfaction in Private Higher Education Institutions in Addis Ababa
Creators: name: Melese, Girum
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2017

description: The main objective of this study was to evaluate effect of service quality over the satisfaction of students' in private higher educational institutions in Addis Ababa. For this purpose the study used the HEDPERF variables of service quality instrument. Among the dimensions of HEDPERF developed by Firdaus (2005) the following five factors were used for this study namely non-academic aspects, academic aspects, program issues, reputation and access. A sample of 200 respondents was selected using a non-probabilistic/convenience sampling technique. According to the findings of the study all the five dimensions of HEDPERF have shown slightly above average mean score. This indicates that students of private higher educational institutions are not satisfied enough with the service provided to them hence; their perception is good. The dimension with the lowest mean score is access followed by program issue and non academic aspect. Pearson correlation analysis was conducted to examine the relationship between HEDPERF variables and service quality the results shows that all the five dimensions of service quality have a positive significant relationship with student satisfaction where academic aspects, non-academic aspects and reputation have a strong and positive significant correlation with satisfaction while program issues and access have a weak positive correlation with student satisfaction. For that academic aspect, reputation and non-academic aspects of HEDPERF service variables have shown statistically significant impact on student satisfaction. Accordingly private higher educational institutions in Addis Ababa should give more emphasis and due attention to those dimensions of service quality to improve the level of their student satisfaction
Eva Senghaas-Knobloch (Hg.): Macht, Kooperation und Subjektivität in betrieblichen Veränderungsprozessen. Mit Beispielen aus Aktionsforschung und Prozessberatung in Klein- und Mittelbetrieben, Arbeitsgestaltung - Technikbewertung - Zukunft, Bd. 12, Münster: LIT, 2001, ISBN 3-8258-5487-6 6 u. 198 S., DM 39.80/ 20,90 Euro
Creators: name: Eberwein, Wilhelm
Publisher: name: Lucius & Lucius Verlagsgesellschaft
Year: 2011
Subjects: subject: 300
subject: 650

description: Arbeit
BalCon -- resource balancing algorithm for VM consolidation
Creators: name: Gudkov, Andrei
name: Popov, Pavel
name: Romanov, Stepan
Publisher: name: arXiv
Year: 2023
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Discrete Mathematics (cs.DM)
subject: FOS: Computer and information sciences

description: Cloud providers handle substantial number of requests to create and delete virtual machines (VMs) on a daily basis, where the unknown sequence of requests eventually leads to resource fragmentation. To mitigate this issue, periodic consolidation of VMs into fewer number of physical hosts is an important cost-saving procedure, closely related to the vector bin-packing problem. In this paper, we propose the BalCon algorithm for consolidation that steadily reduces the number of active hosts and keeps migration costs low. BalCon classifies the cluster's state and selects one of three heuristics to balance resources for superior consolidation. To evaluate BalCon's performance with respect to optimality, we introduce integer programming models. BalCon finds 99.7% of the optimal solutions for over 750 problem instances. This outstanding result was achieved due to the Force Step of our algorithm, which is the key improvement detail for common heuristics. We compare BalCon with a modified Sercon heuristic using Huawei and synthetic datasets with two resources for allocation.
Diagonal and off-diagonal susceptibilities of conserved quantities in relativistic heavy-ion collisions
Creators: name: Chatterjee, Arghya
name: Chatterjee, Sandeep
name: Nayak, Tapan K.
name: Sahoo, Nihar Ranjan
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Susceptibilities of conserved quantities, such as baryon number, strangeness and electric charge are sensitive to the onset of quantum chromodynamics (QCD) phase transition and are expected to provide information on the matter produced in heavy-ion collision experiments. A comprehensive study of the second-order diagonal susceptibilities and cross correlations has been made within a thermal model approach of the hadron resonance gas (HRG) model as well as with a hadronic transport model, UrQMD. We perform a detailed analysis of the effect of detector acceptances and choice of particle species in the experimental measurements of the susceptibilities for heavy-ion collisions corresponding to \sNN = 4 GeV to 200 GeV. The transverse momentum cutoff dependence of suitably normalised susceptibilities are proposed as useful observables to probe the properties of the medium at freezeout.
description: 16 pages, 11 figures
The Effect Of Advertising On Consumer Purchase Decision The Case Of Baby Diaper
Creators: name: Adbib, Frehun
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2019

description: Advertising is a form of communication intended to convince an audience (viewers, readers or listeners) to purchase or take some action upon products, information, or services etc. This paper tried to investigate the relationship between advertising (advertising media, advertising message, source credibility, source attractiveness and product personality congruence) andconsumer purchase decision of baby diaper by tapping the responses of 380 respondents from four sub cities of Addis Ababa City Administration (Bole, Arada, Kirkos&Yeka). To achieve the objectives of the study, descriptive and explanatory research design were used. Data was collected through questionnaire from a sample of 380 purchasers of disposable baby diaper that were selected using convenient sampling method. The data collected from the questionnaire were analyzed using descriptive statistics (such as mean, standard deviation, percentage and frequency) and inferential statistics like correlation, and multiple regression analysis. The finding revealed that there are positive and significant relationships between advertising message, source credibility, advertising media and consumer purchase decision of baby diaper.The score of the coefficient correlation determination R2 is 0.655, which implies that there is quite significant explanatory power and also 65.5% variation on the purchase decision of baby diaper is caused by advertising message, source credibility, advertising media, source attractiveness and product personality match. Eventually, this study recommends appropriate actions for companies in refining their advertising strategies as a means of overcoming the stiff competition that prevails in the market, therefore, they can increase their sales volume and market share.
Resolving the Hubble tension with Early Dark Energy
Creators: name: Herold, Laura
name: Ferreira, Elisa G. M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Early dark energy (EDE) offers a solution to the so-called Hubble tension. Recently, it was shown that the constraints on EDE using Markov Chain Monte Carlo are affected by prior volume effects. The goal of this paper is to present constraints on the fraction of EDE, $f_\mathrm{EDE}$, and the Hubble parameter, $H_0$, which are not subject to prior volume effects. We conduct a frequentist profile likelihood analysis considering Planck cosmic microwave background, BOSS full-shape galaxy clustering, DES weak lensing, and SH0ES supernova data. Contrary to previous findings, we find that $H_0$ for the EDE model is in statistical agreement with the SH0ES direct measurement at $\leq 1.7\,σ$ for all data sets. For our baseline data set (Planck + BOSS), we obtain $f_\mathrm{EDE} = 0.087\pm 0.037$ and $H_0 = 70.57 \pm 1.36\, \mathrm{km/s/Mpc}$ at $68\%$ confidence limit. We conclude that EDE is a viable solution to the Hubble tension.
description: 6 pages, 3 figures, 1 table
title: Lisbon take off?
title: Zum Bedeutungsgewinn von Arbeitspolitik im Europäischen Wettbewerbsmodell
titleType: AlternativeTitle
Creators: name: Kruse, Wilfried
Publisher: name: Lucius & Lucius Verlagsgesellschaft
Year: 2011
Subjects: subject: 300
subject: 650

description: Arbeit
Easy English: Building an Extensive Reading Collection for English Language Learners
Creators: name: Svoboda, Elizabeth
Publisher: name: My University
Year: 2016
Subjects: subject: extensive reading
subject: English language learners
subject: collection management
subject: collection development
subject: Information Science
subject: Social Sciences

description: This poster presentation changed to a lightning round at the conference.
description: International students enrolled in intensive English programs are a somewhat overlooked population of academic library users. At the University of Michigan-Flint, a connection between the library and the University’s English Language Program was forged with the creation of an extensive reading collection. Poster will discuss issues around building the collection, making it accessible to students, and implementation of the extensive reading program.
Comparison of five Calligonum species in Tarim Basin based on morphological and molecular data
Creators: name: Abdurahman, Maryamgul
name: Liu, Bin
name: Pan, Borong
name: Sabirhazi, Gulnur
name: Yin, Linke
Publisher: name: Technische Universität Dortmund
Year: 2013
Subjects: subject: Calligonum
subject: fruit
subject: ITS
subject: morphology
subject: trnL-F
subject: 610

description: Five Calligonum species endemic to the Tarim Basin – C. roborowskii, C. kuerlese, C. juoqiangense, C. yengisaricum, and C. taklimakanense – were compared using 14 morphological characteristics and nrDNA ITS and cpDNA trnL-F molecular data. Intraspecific and interspecific morphological variation was uncovered, with variation between species significant for most characteristics. Based on Euclidean distances, C. roborowskii and C. kuerlese were the most similar, and C. yengisaricum and C. kuerlese were the most divergent. There was very little variation in the molecular sequence data: although several variable sites were present in ITS and trnL-F regions, none of them were parsimony informative. Results of morphological and molecular analyses suggest that the various morphological characteristics of the studied Calligonum species are strongly shaped by environmental factors, with the observed intraspecific and interspecific morphological variation a product of the spatial isolation and extreme drought of the Tarim Basin.
description: EXCLI Journal ; Vol. 11, 2012
Verteilte Prozesskontrolle in ressourcenbasierten Architekturen
Creators: name: Sugioarto, Martin
Publisher: name: Technische Universität Dortmund
Year: 2013
Subjects: subject: Agenten
subject: Architekturen
subject: Monotonie
subject: Prozesse
subject: Ressourcen
subject: REST
subject: Verteilte Systeme
subject: 004

description: Prozesskontrolle in entkoppelten, verteilten und datenbasierten Architekturen, wie dem World Wide Web, ist eine Herausforderung, die diese Arbeit thematisiert. Nach der Formalisierung des Representational State Transfer (REST) und der Erweiterung des Architekturstils zu ressourcenbasierten Architekturen wird anhand von Ressourcen, Agenten und ihres Verhaltens gezeigt, wie Informationsübertragung realisiert werden kann, um anschließend kooperative Prozesse mit Hilfe von monotoner Sequenzen und monotoner Warteschlangen betreiben zu können. Abschließend wird untersucht wie sich ressourcenbasierte Architekturen zu bekannten Geschäftsprozesssprachen und ihren Modellen verhalten.
One-Dimensional Random Walk in Multi-Zone Environment
Creators: name: Nazarenko, A. V.
name: Blavatska, V.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We study a symmetric random walk (RW) in one spatial dimension in environment, formed by several zones of finite width, where the probability of transition between two neighboring points and corresponding diffusion coefficient are considered to be differently fixed. We derive analytically the probability to find a walker at the given position and time. The probability distribution function is found and has no Gaussian form because of properties of adsorption in the bulk of zones and partial reflection at the separation points. Time dependence of the mean squared displacement of a walker is studied as well and revealed the transient anomalous behavior as compared with ordinary RW.
description: 12 pages, 2 figures
Two is better than one: The U-spin-CP anomaly in charm
Creators: name: Bause, Rigo
name: Gisbert, Hector
name: Hiller, Gudrun
name: Höhne, Tim
name: Litim, Daniel F.
name: Steudtner, Tom
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The recent measurement of the CP-asymmetry in the decay $D \to K^+ K^-$ by LHCb, combined with $ΔA_{\text{CP}}$, evidences a sizable CP-asymmetry in $D \to π^+ π^-$ decays, which requires a dynamical enhancement of standard model higher-order contributions over tree-level ones by a factor of two. The data furthermore imply huge U-spin breaking, about 4-5 times larger than the nominal standard model one of $\lesssim 30 \%$ in charm. Enhanced breakdown of the two approximate symmetries points to models that violate U-spin and CP and disfavors flavor singlet contributions such as chromomagnetic dipole operators as explanations of the data. We analyze the reach of flavorful $Z^\prime$ models for charm CP-asymmetries. Models feature explicit U-spin and isospin breaking, allowing for correlations with $D \to π^0 π^0$ and $D^+ \to π^+ π^0$ decays with corresponding CP-asymmetries at a similar level and sign as $D \to π^+ π^-$, about $ {\cal{O}}(1-2) \cdot 10^{-3}$. Experimental and theoretical constraints narrow down the shape of viable models: anomaly-free models are leptophobic -- or at least electro- and muo-phobic -- with light $Z^\prime$ below ${\cal{O}}(20)$ GeV, and can be searched for in low mass dijets at the LHC, $Υ$ and charmonium decays, and dark photon signatures. A $Z^\prime$ around $\sim 3$ GeV or $\sim (5-7)$ GeV can relieve the tensions in the $J/ψ\to π^+ π^-$ and $ψ^\prime \to π^+ π^-$ branching ratios with pion form factors from fits to Babar and JLab data, and simultaneously explain the charm CP asymmetries. Models also feature sizable branching ratios into light right-handed neutrinos or vector-like dark fermions, which can be searched for in $e^+ e^- \to$~hadrons + invisibles at Belle II and BESIII. Due to the low new physics scale dark fermions may induce an early Landau pole which requires UV-completion near the TeV-scale.
description: 13 pages, 5 figures. v2: Fig.1 and discussion on U-Spin improved, minor corrections and references added, v3: match published version
Constraining the dark matter content of NGC 1291 using hydrodynamic gas response simulations
Creators: name: Fragkoudi, F.
name: Athanassoula, E.
name: Bosma, A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a pilot study on the nearby massive barred galaxy NGC 1291, in which we use dynamical modelling to constrain the disc mass-to-light ratio (M/L), thus breaking the degeneracy between the baryonic and dark matter in its central regions. We use the gas, specifically the morphology of the dust lanes on the leading side of the bar, as a tracer of the underlying gravitational potential. We run a large number of hydrodynamic gas response simulations, in potentials obtained directly from near-infrared images of the galaxy, which have three free parameters: the M/L, the bar pattern speed and the height function. We explore the three-dimensional parameter space, by comparing the morphology of the shocks created in the gas response simulations with those of the observed dust lanes, and find the best-fitting models; these suggest that the M/L of NGC 1291 agrees with that predicted by stellar population synthesis models in the near-infrared ($\approx$0.6\,$M_{\odot}/L_{\odot}$), which leads to a borderline maximum disc for this galaxy. Furthermore, we find that the bar rotates fast, with a corotation radius which is $\leq$ 1.4 times the bar length.
description: 16 pages including Appendix, 14 figures. Accepted for publication in MNRAS
Beyond the Classics: Building a Diverse Extensive Reading Library
Creators: name: Svoboda, Elizabeth
Publisher: name: My University
Year: 2016
Subjects: subject: English language learners
subject: collection development
subject: collection management
subject: diversity
subject: graded readers
subject: Information Science
subject: Social Sciences

description: “Teacher, I do not like these books.” Sound familiar? Explore how to diversify an extensive reading library through incorporating nonfiction, contemporary and genre fiction, multicultural literature, and more. We will look at some less well-known series and publishers of graded readers as well as introducing non-traditional ESL/EFL literacy materials.
Phase transition and critical phenomena of black holes: A general approach
Creators: name: Mandal, Abhijit
name: Samanta, Saurav
name: Majhi, Bibhas Ranjan
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: We present a general framework to study the phase transition of a black hole. Assuming that there is a phase transition, it is shown that without invoking any specific black hole, the critical exponents and the scaling powers can be obtained. We find that the values are exactly same which were calculated by taking explicit forms of different black hole spacetimes. The reason for this universality is also explained. The implication of the analysis is -- one does not need to investigate this problem case by case, what the people are doing right now. We also observe that these, except two such quantities, are independent of the details of the spacetime dimensions.
description: Refs added, to appear in Phys. Rev. D
Investigating visual responsibility and representation : critical approaches to documentary and mockumentary video production
Creators: name: Ackermann, Devon.
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.
Analysis of the Success Factors of Micro and Small Business Enterprises in Addis Ababa
Creators: name: Abebe, Tiruneh
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2011

description: The research study evaluated the relation between personal related success factors and business related factors on the performance of MSEs in Addis Ababa. This is with a view to identify these personal and business related factors that have a favorable relation to the performance of the enterprises business performance. Primary data, through structured questionnaire, were collected from the samples of 73 MSEs randomly selected from among those industries engaged in Food and Beverage; Textile and Garment, Wood and Metal, and Merchandise and Retail shop. Data were analyzed using descriptive and inferential statistics with the aid of Statistical Packages for Social Scientists (SPSS). Also, analysis of variance was carried out to examine the variation in the performance of enterprises related to the variation in each of the independent variables of the study. The ANOVA result indicates there is no significance variation on the performance of MSEs in relation to the variations to each of the eight independent variables of the study. But the descriptive statistics result shows better performance for enterprises owned by individuals with better education level, have prior management and industry experience. In addition it also shows better performance for those enterprises that uses planning and record keeping
Exciting Reflectionless Unidirectional Edge Modes in a Reciprocal Photonic Topological Insulator Medium
Creators: name: Xiao, Bo
name: Lai, Kueifu
name: Yu, Yang
name: Ma, Tzuhsuan
name: Shvets, Gennady
name: Anlage, Steven M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Photonic topological insulators are an interesting class of materials whose photonic band structure can have a bandgap in the bulk while supporting topologically protected unidirectional edge modes. Recent studies [1-6] on bianisotropic metamaterials that emulate the electronic quantum spin Hall effect using its electromagnetic analog are examples of such systems with relatively simple and elegant design. In this paper, we present a rotating magnetic dipole antenna, composed of two perpendicularly oriented coils, that can efficiently excite the unidirectional topologically protected surface waves in the bianisotropic metawaveguide (BMW) structure recently realized by Ma, et al. [1], despite the fact that the BMW medium does not break time-reversal invariance. In addition to achieving high directivity, the antenna can be tuned continuously to excite reflectionless edge modes to the two opposite directions with various amplitude ratios. We demonstrate its performance through experiment and compare to simulation results.
Stochastic stiffness identification and response estimation of Timoshenko beams via physics-informed Gaussian processes
Creators: name: Tondo, Gledson Rodrigo
name: Rau, Sebastian
name: Kavrakov, Igor
name: Morgenthal, Guido
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Machine learning models trained with structural health monitoring data have become a powerful tool for system identification. This paper presents a physics-informed Gaussian process (GP) model for Timoshenko beam elements. The model is constructed as a multi-output GP with covariance and cross-covariance kernels analytically derived based on the differential equations for deflections, rotations, strains, bending moments, shear forces and applied loads. Stiffness identification is performed in a Bayesian format by maximising a posterior model through a Markov chain Monte Carlo method, yielding a stochastic model for the structural parameters. The optimised GP model is further employed for probabilistic predictions of unobserved responses. Additionally, an entropy-based method for physics-informed sensor placement optimisation is presented, exploiting heterogeneous sensor position information and structural boundary conditions built into the GP model. Results demonstrate that the proposed approach is effective at identifying structural parameters and is capable of fusing data from heterogeneous and multi-fidelity sensors. Probabilistic predictions of structural responses and internal forces are in closer agreement with measured data. We validate our model with an experimental setup and discuss the quality and uncertainty of the obtained results. The proposed approach has potential applications in the field of structural health monitoring (SHM) for both mechanical and structural systems.
Quantitative shadowgraphy and proton radiography for large intensity modulations
Creators: name: Kasim, Muhammad Firmansyah
name: Ceurvorst, Luke
name: Ratan, Naren
name: Sadler, James
name: Chen, Nicholas
name: Savert, Alexander
name: Trines, Raoul
name: Bingham, Robert
name: Burrows, Philip N.
name: Kaluza, Malte C.
name: Norreys, Peter
Publisher: name: arXiv
Year: 2016
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Shadowgraphy is a technique widely used to diagnose objects or systems in various fields in physics and engineering. In shadowgraphy, an optical beam is deflected by the object and then the intensity modulation is captured on a screen placed some distance away. However, retrieving quantitative information from the shadowgrams themselves is a challenging task because of the non-linear nature of the process. Here, a novel method to retrieve quantitative information from shadowgrams, based on computational geometry, is presented for the first time. This process can be applied to proton radiography for electric and magnetic field diagnosis in high-energy-density plasmas and has been benchmarked using a toroidal magnetic field as the object, among others. It is shown that the method can accurately retrieve quantitative parameters with error bars less than 10%, even when caustics are present. The method is also shown to be robust enough to process real experimental results with simple pre- and post-processing techniques. This adds a powerful new tool for research in various fields in engineering and physics for both techniques.
Detecting axion dark matter beyond the magnetoquasistatic approximation
Creators: name: Benabou, Joshua N.
name: Foster, Joshua W.
name: Kahn, Yonatan
name: Safdi, Benjamin R.
name: Salemi, Chiara P.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A number of proposals have been put forward for detecting axion dark matter (DM) with grand unification scale decay constants that rely on the conversion of coherent DM axions to oscillating magnetic fields in the presence of static, laboratory magnetic fields. Crucially, such experiments $\unicode{x2013}$ including ABRACADABRA $\unicode{x2013}$ have to-date worked in the limit that the axion Compton wavelength is larger than the size of the experiment, which allows one to take a magnetoquasistatic (MQS) approach to modeling the axion signal. We use finite element methods to solve the coupled axion-electromagnetism equations of motion without assuming the MQS approximation. We show that the MQS approximation becomes a poor approximation at frequencies two orders of magnitude lower than the naive MQS limit. Radiation losses diminish the quality factor of an otherwise high-$Q$ resonant readout circuit, though this may be mitigated through shielding and minimizing lossy materials. Additionally, self-resonances associated with the detector geometry change the reactive properties of the pickup system, leading to two generic features beyond MQS: there are frequencies that require an inductive rather than capacitive tuning to maintain resonance, and the detector itself becomes a multi-pole resonator at high frequencies. Accounting for these features, competitive sensitivity to the axion-photon coupling may be extended well beyond the naive MQS limit.
description: 6+5 pages, 3+9 figures
Transitioning from Face-to-face to Synchronous & Asynchronous Online Library Instruction: The Case of the Plagiarism Workshop
Creators: name: Svoboda, Elizabeth
Publisher: name: My University
Year: 2018
Subjects: subject: online instruction
subject: synchronous online workshop
subject: asynchronous online module
subject: Information Science
subject: Social Sciences

description: Declining attendance at an on-campus plagiarism workshop over several semesters prompted the presenter to try a different approach, namely to an online environment. The presenter will give her motivations for moving to an online environment and discuss challenges, best practices, and tips about transitioning from face-to-face to both a synchronous webinar and an asynchronous online module for use in the virtual classroom.
Housing, collateral constraints, and fiscal policy
Creators: name: Polattimur, Hamza
Publisher: name: Technische Universität Dortmund
Year: 2013
Subjects: subject: Collateral Constraints
subject: Housing
subject: Optimal Fiscal Policy
subject: 310
subject: 330
subject: 620

description: This paper studies the preferential tax treatment of housing that can be observed in many industrialized countries. It provides a rationale for it by means of an optimal taxation approach taking into account an important feature of housing, namely its usage as collateral. In a borrower-lender framework where private loans are assumed to be non-enforceable and have to be collateralized by housing, optimal fisscal policy should disburden constrained borrowers by subsidizing their housing.
description: Discussion Paper / SFB 823;23/2013
There is Something Beyond the Twitter Network
Creators: name: Pacuk, Andrzej
name: Sankowski, Piotr
name: Wegrzycki, Karol
name: Wygocki, Piotr
Publisher: name: arXiv
Year: 2016
Subjects: subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences
subject: I.6; H.3.4

description: How information spreads through a social network? Can we assume, that the information is spread only through a given social network graph? What is the correct way to compare the models of information flow? These are the basic questions we address in this work. We focus on meticulous comparison of various, well-known models of rumor propagation in the social network. We introduce the model incorporating mass media and effects of absent nodes. In this model the information appears spontaneously in the graph. Using the most conservative metric, we showed that the distribution of cascades sizes generated by this model fits the real data much better than the previously considered models.
description: 8 pages, 2 figures, Hypertext 2016
High-resolution far-infrared spectroscopy and analysis of the $ν$3 and $ν$6 bands of chloromethane
Creators: name: Hardy, Pierre
name: Richard, C.
name: Boudon, Vincent
name: Vaseem, Mohammad
name: Manceron, Laurent
name: Dridi, Nawel
Publisher: name: arXiv
Year: 2023
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Ro-vibrational spectra of the $ν_3$ and $ν_6$ bands of chloromethane ($\mathrm{CH_3Cl}$) were recorded in the 650--1130 $\mathrm{cm}^{-1}$ range using a Fourier transform spectrometer at the AILES beamline of the SOLEIL synchrotron facility. Two isotopologues ($\mathrm{CH_3^{35}Cl}$ and $\mathrm{CH_3^{37}Cl}$) have been analyzed with the tensorial formalism developed in Dijon and a total of 6753 lines were assigned. We derived 23 tensorial parameters for the lines positions (4 for the ground state, 6 for $ν_3$, and 13 for $ν_6$), and 7 for the lines intensities (4 for $ν_3$, 3 for $ν_6$). From those parameters and self-broadening coefficients found in the literature, we simulated spectra of both isotopologues. The derived parameters were converted in the Watson formalism to be compared with a previous study. Using these results, we set up a new database of calculated chloromethane spectral lines (ChMeCaSDa).
description: Journal of Quantitative Spectroscopy & Radiative Transfer, In press
Holomorphic Yukawa Couplings for Complete Intersection Calabi-Yau Manifolds
Creators: name: Blesneag, Stefan
name: Buchbinder, Evgeny I.
name: Lukas, Andre
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We develop methods to compute holomorphic Yukawa couplings for heterotic compactifications on complete intersection Calabi-Yau manifolds, generalising results of an earlier paper for Calabi-Yau hypersurfaces. Our methods are based on constructing the required bundle-valued forms explicitly and evaluating the relevant integrals over the projective ambient space. We also show how our approach relates to an earlier, algebraic one to calculate the holomorphic Yukawa couplings. A vanishing theorem, which we prove, implies that certain Yukawa couplings allowed by low-energy symmetries are zero due to topological reasons. To illustrate our methods, we calculate Yukawa couplings for SU(5)-based standard models on a co-dimension two complete intersection manifold.
description: 40 pages, Latex; v2: minor corrections, references added
Asymptotics of improved generalized moments estimators for spatial autoregressive error models
Creators: name: Arnold, Matthias
name: Drinkuth, Carsten
Publisher: name: Technische Universität Dortmund
Year: 2013
Subjects: subject: Asymptotic normality
subject: GMM estimation
subject: Regression residuals
subject: Spatial autoregression
subject: 310
subject: 330
subject: 620

description: This paper considers linear models with a spatial autoregressive error structure. Extending Arnold and Wied (2010), who develop an improved GMM estimator for the parameters of the disturbance process to reduce the bias of existing estimation approaches, we establish the asymptotic normality of a new weighted version of this improved estimator and derive the efficient weighting matrix. We also show that this efficiently weighted GMM estimator is feasible as long as the regression matrix of the underlying linear model is non-stochastic and illustrate the performance of the new estimator by a Monte Carlo simulation and an application to real data.
description: Discussion Paper / SFB 823;22/2013
Search for R-parity violating supersymmetry with displaced vertices in proton-proton collisions at sqrt(s) = 8 TeV
Creators: name: CMS Collaboration
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Results are reported from a search for R-parity violating supersymmetry in proton-proton collision events collected by the CMS experiment at a center-of-mass energy of sqrt(s) = 8 TeV. The data sample corresponds to an integrated luminosity of 17.6 inverse femtobarns. This search assumes a minimal flavor violating model in which the lightest supersymmetric particle is a long-lived neutralino or gluino, leading to a signal with jets emanating from displaced vertices. In a sample of events with two displaced vertices, no excess yield above the expectation from standard model processes is observed, and limits are placed on the pair production cross section as a function of mass and lifetime of the neutralino or gluino. At 95% confidence level, the analysis excludes cross sections above approximately 1 fb for neutralinos or gluinos with mass between 400 and 1500 GeV and mean proper decay length between 1 and 30 mm. Gluino masses are excluded below 1 and 1.3 TeV for mean proper decay lengths of 300 micrometers and 1 mm, respectively, and below 1.4 TeV for the range 2-30 mm. The results are also applicable to other models in which long-lived particles decay into multijet final states.
description: Replaced with the published version. All the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/SUS-14-020/index.html
Optimizing machine learning methods to discover strong gravitational lenses in the Deep Lens Survey
Creators: name: C., Keerthi Vasan G.
name: Sheng, Stephen
name: Jones, Tucker
name: Choi, Chi Po
name: Sharpnack, James
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Machine learning models can greatly improve the search for strong gravitational lenses in imaging surveys by reducing the amount of human inspection required. In this work, we test the performance of supervised, semi-supervised, and unsupervised learning algorithms trained with the ResNetV2 neural network architecture on their ability to efficiently find strong gravitational lenses in the Deep Lens Survey (DLS). We use galaxy images from the survey, combined with simulated lensed sources, as labeled data in our training datasets. We find that models using semi-supervised learning along with data augmentations (transformations applied to an image during training, e.g., rotation) and Generative Adversarial Network (GAN) generated images yield the best performance. They offer 5--10 times better precision across all recall values compared to supervised algorithms. Applying the best performing models to the full 20 deg$^2$ DLS survey, we find 3 Grade-A lens candidates within the top 17 image predictions from the model. This increases to 9 Grade-A and 13 Grade-B candidates when $1$% ($\sim2500$ images) of the model predictions are visually inspected. This is $\gtrsim10\times$ the sky density of lens candidates compared to current shallower wide-area surveys (such as the Dark Energy Survey), indicating a trove of lenses awaiting discovery in upcoming deeper all-sky surveys. These results suggest that pipelines tasked with finding strong lens systems can be highly efficient, minimizing human effort. We additionally report spectroscopic confirmation of the lensing nature of two Grade-A candidates identified by our model, further validating our methods.
description: 23 pages, 15 figures (including appendix), published in MNRAS
Determinants Of Customer Orientation Of Front-line Employees (Tellers) On Customer Satisfaction The Case Of Commercial Bank Of Ethiopia
Creators: name: Alemayehu, Yeshiwork
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2019

description: The purpose or the study is to find out the determinate of customer orientation of service employee on customer satisfaction in five selected branches found in Addis Ababa. To attain objective, questionnaire was designed categorized under four dimensions of customer orientation service employee proposed by Hennig (2004) i.e Technical skills, social skills, motivation and perceived decision making authority. The sample consists of 278respondents' selected based on purposive sampling procedure. This study used quantitative research design and both primary. The collected data was analyzed with the help of SPSS version 23 .Correlation and multiple regressions were used to investigate the relationship between dependent and independent Variables. The correlation results indicate that there is a positive correlation between the dimensions of COSE and customer satisfaction. The results of the regression test showed that COSE have positive impact on overall customer satisfaction. and also the highest correlation is between Employee technical skill and customer satisfaction Followed by social skill. So that the CBE is better to work on the Employee technical skill and the other dimensions too. In order to improve performance of the bank, the researcher suggested that, the bank should considering the four COSE while recruiting and developing the existing employees
Granarchy : adding a post-menopausal perspective to art interpretations of women
Creators: name: Adam, Cheryl.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
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