cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Effect of Marketing Mix Elements on the Satisfaction of Inbound Tourists to Ethiopia
Creators: name: Melese, Getachew
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2017

description: This study is designed to examine the relationship between satisfaction of inbound tourists to Ethiopia and the marketing mix elements. The marketing mix elements which were surveyed had been destination (product), price, places, processes, promotion, physical evidence and people. The study had mainly employed quantitative approach and used descriptive analysis and regression. It was supplemented by key informant interview. The sample size was 385 tourists who were in Ethiopia in the month April 2017. The survey had 50 questions covering demographic details, travel characteristics and survey response on marketing mix elements. Data were also tested using linearity, Cronbach alpha and multicollinearity in order to determine the appropriateness of the data and the tools used for analysis. The findings show that the marketing mix elements in general were partially responsible for the satisfaction of inbound tourists to Ethiopia. The variables that had significant effect on satisfaction of inbound tourists were found to be destination (product), people, price and physical evidence. The contribution of places, processes and promotion in the satisfaction of the inbound tourists was insignificant.
Geometrische Algorithmen in der Flächenrückführung
Creators: name: Weller, Frank
Publisher: name: Universität Dortmund
Year: 2001
Subjects: subject: Algorithmische Geometrie
subject: Aufzählungsalgorithmen
subject: computational geometry
subject: Delaunaydiagramme
subject: delaunay diagrams
subject: enumeration algorithms
subject: Flächenrückführung
subject: Polygonale Hüllen
subject: polygonal hulls
subject: reverse engineering
subject: Sphärische konvexe Hüllen
subject: spherical convex hulls
subject: surface reconstruction
subject: triangulation
subject: Triangulierung
subject: 004

description: Gegenstand der Flächenrückführung ist, aus einer gegebenen Menge von Abtastpunkten einer Fläche eine Näherung zu rekonstruieren, die die Fläche möglichst gut repräsentiert. Ein weit verbreiteter Ansatz ist, die rekonstruierte Fläche durch ein Netz aus Polygonen, meist Dreiecken, zu beschreiben. Die Schwierigkeit besteht darin, unter den kombinatorisch vielen Möglichkeiten eine "gute" Rekonstruktion zu erhalten, insbesondere für den Fall, dass die ursprünglich gegebene Fläche nicht bekannt ist. Im Zusammenhang mit Verfahren zur Flächenrückführung treten vielfältige geometrische Teilprobleme auf, die für sich gesehen interessant sind. In dieser Arbeit werden für eine Reihe solcher Probleme effiziente Algorithmen entwickelt. Zu nennen sind Korrektheitsbetrachtungen für den gebräuchlichen Oriented-Walk-Algorithmus, Triangulierung innerhalb frei wählbarer, nicht konvexer Gebiete in der Ebene, Berechnung konvexer Hüllen von Polygonen auf Sphären mit linearem Zeitaufwand, Stabilität von Delaunay-Facetten mit Anwendung auf die Rekonstruktion geschlossener Flächen sowie effiziente Aufzählung polygonaler Hüllen.
The 5 MeV bump - a nuclear whodunit mystery
Creators: name: Huber, Patrick
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We perform a combined analysis of recent NEOS and Daya Bay data on the reactor antineutrino spectrum. This analysis includes approximately 1.5 million antineutrino events, which is the largest neutrino event sample analyzed to date. We use a double ratio which cancels flux model dependence and related uncertainties as well as the effects of the detector response model. We find at 3-4 standard deviation significance level, that plutonium-239 and plutonium-241 are disfavored as the single source for the the so-called 5 MeV bump. This analysis method has general applicability and in particular with higher statistics data sets will be able to shed significant light on the issue of the bump. With some caveat this also should allow to improve the sensitivity for sterile neutrino searches in NEOS.
description: 4 pages, 2 figures, version to appear in Phys. Rev. Lett
Molecular Shattering
Creators: name: Farber, Ryan Jeffrey
name: Gronke, Max
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Recent observations suggest galaxies may ubiquitously host a molecular component to their multiphase circumgalactic medium (CGM). However, the structure and kinematics of the molecular CGM remains understudied theoretically and largely unconstrained observationally. Recent work suggests molecular gas clouds with efficient cooling survive acceleration in hot winds similar to atomic clouds. Yet the pressure-driven fragmentation of molecular clouds when subjected to external shocks or undergoing cooling remains unstudied. We perform radiative, inviscid hydrodynamics simulations of clouds perturbed out of pressure equilibrium to explore the process of hydrodynamic fragmentation to molecular temperatures. We find molecular clouds larger than a critical size can shatter into a mist of tiny droplets, with the critical size deviating significantly from the atomic case. We find that cold clouds shatter only if the sound crossing time exceeds the local maximum of the cooling time ~8000 K. Moreover, we find evidence for a universal mechanism to 'shatter' cold clouds into a 'mist' of tiny droplets as a result of rotational fragmentation -- a process we dub 'splintering.' Our results have implications for resolving the molecular phase of the CGM in observations and cosmological simulations.
description: 5 pages, 4 figures, submitted to MNRASL
A scale dependent black hole in three-dimensional space-time
Creators: name: Koch, Benjamin
name: Reyes, Ignacio A.
name: Rincon, Angel
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Scale dependence at the level of the effective action is a generic result of quantum field theory. Allowing for scale dependence of the gravitational couplings leads to a generalization of the corresponding field equations. In this work, those equations are solved by imposing the "null energy condition" in three-dimensional space time with stationary spherical symmetry. The constants of integration are given in terms of the classical BTZ parameters plus one additional constant, that parametrizes the strength of the scale dependence. The properties such as asymptotics, horizon structure, and thermodynamics are discussed. It is found that the black hole entropy shows a remarkable transition from the usual "area~law" to an "area~$\times$~radius" law.
description: 12 pages, 4 figures; v2: references added, improved discussion, version published in Class. Quantum Grav
An Arbitrarily High Order Unfitted Finite Element Method for Elliptic Interface Problems with Automatic Mesh Generation
Creators: name: Chen, Zhiming
name: Liu, Yong
Publisher: name: arXiv
Year: 2022
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 65N50, 65N30

description: We consider the reliable implementation of high-order unfitted finite element methods on Cartesian meshes with hanging nodes for elliptic interface problems. We construct a reliable algorithm to merge small interface elements with their surrounding elements to automatically generate the finite element mesh whose elements are large with respect to both domains. We propose new basis functions for the interface elements to control the growth of the condition number of the stiffness matrix in terms of the finite element approximation order, the number of elements of the mesh, and the interface deviation which quantifies the mesh resolution of the geometry of the interface. Numerical examples are presented to illustrate the competitive performance of the method.
description: 34 pages, 20 figures
The Effect of Sales Promotion on Customer Loyalty In lubricant Products in Addis Ababa: In the Case of Total Ethiopian S.C
Creators: name: Fekadu, Sirak
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2018

description: Sales promotion has been an important part of marketing since companies began to recognize the relevance of having control over their image of the brand. It is a key ingredient in marketing campaigns, & consists of a diverse collection of incentive tools, most short term designed to stimulate. The fact that how foundational most organization recognize sales promotion to be, but just how little companies are willing to spend to get it done right. Which indicate, there is lack of knowledge of understanding of the vital role of sales promotion in one"s business success with the relationship between sales promotion & customer loyalty Therefore, the objective of this research paper is to determine the effect of sales promotion quality, monetary saving, convenience & entertainment on customer loyalty at Total Ethiopian S.C. Non-probability sampling technique of convenience Method was used & the data collection methods were documents, questionnaire & interview. A total no of 384 questionnaires were distributed in Addis Ababa which two selected sub-cites which is lideta and kolfe the target populations are individual and corporate customers. The questionnaires were analyzed using Cronbach Alpha, descriptive statistics, ANOVA, correlation & regression. Sales promotion dimension quality, monetary saving, convenience & entertainment have a strong relationship with customer loyalty & the variability of customers overall loyalty can be explained to the extent of 58.0% by sales promotion dimension, quality, Monterey saving, convenience & entertainment. Finally, it was recommended that, to keep the highest customer loyalty through sales promotion i.e. "quality" and Monterey saving of products is a major determinant factor &; to enhance customer loyalty on few major strength of the company through assuring the actual delivery of the claimed sales promotion with continuous customers reward. The effect of sales promotion on customer loyalty in lubricant products to mean there is strong correlation between qualities of products. Monitory saving of products & loyalty. However, it could have been better to work more on the quality of the products in order to increase the customer"s loyalty level & to do further study to identify the reason behind this result.
The Influence Of Celebrity Endorsement Brand Advertising On Consumer Buying Behavior
Creators: name: Dagne, Aynalem
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2019

description: Celebrity endorsement is among the important communications medium that has powerful effect on consumers' behavior. The objectives of this study were to analyze the effect of celebrity endorsement on consumers' buying behavior in the case of CBE. The sample populations of the study were selected branches from the four districts in Addis Ababa. Quantitative research approach and non-probability convenience sampling had been adopted in selecting a sample size of 400. Data were collected using structured questionnaire and analyzed using SPSS 20 and descriptive and inferential research design was used. The results of the study revealed that celebrity endorsement tools have a relationship with consumer buying behavior of CBE customers. Therefore, It is essential for CBE to pay more attention in increasing their celebrity endorsement activities practice specifically should pay more attention to the activities and means of trustworthiness, since the study results showed a weakness in this activities, in influencing the consumers purchasing decision toward these CBE products. Finally the researcher is recommended to CBE is that the strategic impact of celebrity endorsement is best observed when they are designed or built in strategic plan of promotional activities, coordinated with other promotional tools and integrated with the business strategy.
Nonstationary frames of translates and frames for the Weyl--Heisenberg group and the extended affine group
Creators: name: Jindal, Divya
name: Vashisht, Lalit Kumar
Publisher: name: arXiv
Year: 2022
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 42C15, 42C30, 42C40

description: In this work, we analyze Gabor frames for the Weyl--Heisenberg group and wavelet frames for the extended affine group. Firstly, we give necessary and sufficient conditions for the existence of nonstationary frames of translates. Using these conditions, we give the existence of Gabor frames from the Weyl--Heisenberg group and wavelet frames for the extended affine group. We present a representation of functions in the closure of the linear span of a Gabor frame sequence in terms of the Fourier transform of window functions. We show that the canonical dual of frames of translates has the same structure. An approximation of inverse of the frame operator of nonstationary frames of translates is presented. It is shown that a nonstationary frame of translates is a Riesz basis if it is linearly independent and satisfies approximation of the inverse frame operator. Finally, we give equivalent conditions for a nonstationary sequence of translates to be linearly independent.
Infrared fingerprints of few-layer black phosphorus
Creators: name: Zhang, Guowei
name: Huang, Shenyang
name: Chaves, Andrey
name: Song, Chaoyu
name: Özçelik, V. Ongun
name: Low, Tony
name: Yan, Hugen
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Black phosphorus is an infrared layered material. Its bandgap complements other widely studied two-dimensional materials: zero-gap graphene and visible/near-infrared gap transition metal dichalcogenides. Though highly desirable, a comprehensive infrared characterization is still lacking. Here we report a systematic infrared study of mechanically exfoliated few-layer black phosphorus, with thickness ranging from 2 to 15 layers and photon energy spanning from 0.25 to 1.36 eV. Each few-layer black phosphorus exhibits a thickness-dependent unique infrared spectrum with a series of absorption resonances, which reveals the underlying electronic structure evolution and serves as its IR fingerprints. Surprisingly, unexpected absorption features, which are associated with the forbidden optical transitions, have been observed. Furthermore, we unambiguously demonstrate that controllable uniaxial strain can be used as a convenient and effective approach to tune the electronic structure of few-layer black phosphorus. Our study paves the way for black phosphorus applications in infrared photonics and optoelectronics.
description: updated version, add new data for strain engineering of few-layer BP electronic structures. Paper has been published in Nature Communications
Landscape and desire : a studio project exploring place, identity and cultural locations
Creators: name: Tandori, Erica.
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.
Does climate change integration matter in subnational policies? Challenges and solutions in Italian and Austrian cases
Creators: name: Cittadino, Federica
name: Parks, Louisa
name: Bußjäger, Peter
name: Francesca Rosignoli
Publisher: name: Eurac Research
Year: 2023

description: Climate change governance is traditionally thought of and studied mainly as a matter for international cooperation. Central as they are for the advancement of climate-related commitments, international pledges need to be implemented by states, and implementation concerns not only the national level of government, but all government levels since climate change is not a unitary policy field.
Correlation analysis between driver gene mutation and clinicopathological features in lung adenocarcinoma
Creators: name: 闫娜(Na Yan)
Publisher: name: CNGB
Year: 2023
Subjects: Raw sequence reads
Multiisolate
Medical

description: Approximately 80% of lung cancer cases are classified as non-small cell lung cancer (NSCLC)1. The most common subtype of NSCLC is lung adenocarcinoma (LUAD), which accounts for approximately 55% of NSCLC2. LUAD has higher incidence and case fatality rates compared to other types of malignant tumors and exhibits a high level of genetic heterogeneity3. Despite significant improvements in clinical treatment through traditional surgery and the combination of radiotherapy and chemotherapy, overall efficacy and prognosis remain limited. In the past twenty years, with the development of tumor molecular biology and the gradual deepening of gene research, the diagnosis and treatment of LUAD have undergone significant changes4-7. The development and application of targeted drugs have extended survival and improved LUAD patients' quality of life8. The carcinogenic mutation of the epidermal growth factor receptor (EGFR) tyrosine kinase domain showed a significant clinical response to the first-generation EGFR tyrosine kinase inhibitor (TKI) gefitinib in 20044,9, ushering in the era of targeted treatment for NSCLC. Three years later, the discovery of ALK rearrangement broadened the scope of targeted genomic changes in the disease5,10. Subsequently, some other driving events with strong transformation potential were reported, including somatic oncogenic mutations of ROS1, RET, BRAF, gene insertion of HER2, and exon 14 skipping of MET proto-oncogene8,11. Driving genes are essential predictors of targeted therapeutic efficacy. Detecting driver gene mutations in LUAD patients can help screen for targeted drugs, improving patient survival benefits12-15. This study analyzed the mutations of driving genes (EGFR, KRAS, ALK, ROS1, RET, MET, BRAF, HER2, PIK3CA and NRAS) in LUAD and their correlation with clinical pathological features, providing a theoretical basis for promoting multi-gene joint detection.
Neutrino-induced coherent $π^{+}$ production in C, CH, Fe and Pb at $\langle E_ν\rangle \sim 6$ GeV
Creators: name: Ramírez, M. A.
name: Akhter, S.
name: Dar, Z. Ahmad
name: Akbar, F.
name: Ansari, V.
name: Ascencio, M. V.
name: Athar, M. Sajjad
name: Bashyal, A.
name: Bellantoni, L.
name: Bercellie, A.
name: Betancourt, M.
name: Bodek, A.
name: Bonilla, J. L.
name: Bravar, A.
name: Budd, H.
name: Caceres, G.
name: Cai, T.
name: Díaz, G. A.
name: da Motta, H.
name: Dytman, S. A.
name: Felix, J.
name: Fields, L.
name: Filkins, A.
name: Fine, R.
name: Gallagher, H.
name: Ghosh, A.
name: Gilligan, S. M.
name: Gran, R.
name: Granados, E.
name: Harris, D. A.
name: Henry, S.
name: Jena, D.
name: Jena, S.
name: Kleykamp, J.
name: Klustová, A.
name: Kordosky, M.
name: Last, D.
name: Lozano, A.
name: Lu, X. -G.
name: Maher, E.
name: Manly, S.
name: Mann, W. A.
name: Mauger, C.
name: McFarland, K. S.
name: Messerly, B.
name: Miller, J.
name: Moreno, O.
name: Morfín, J. G.
name: Naples, D.
name: Nelson, J. K.
name: Nguyen, C.
name: Olivier, A.
name: Paolone, V.
name: Perdue, G. N.
name: Plows, K. -J.
name: Ransome, R. D.
name: Ruterbories, D.
name: Schellman, H.
name: Su, H.
name: Sultana, M.
name: Syrotenko, V. S.
name: Valencia, E.
name: Vaughan, N. H.
name: Waldron, A. V.
name: Yaeggy, B.
name: Zazueta, L.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: MINERvA has measured the $ν_μ$-induced coherent $π^{+}$ cross section simultaneously in hydrocarbon (CH), graphite (C), iron (Fe) and lead (Pb) targets using neutrinos from 2 to 20 GeV. The measurements exceed the predictions of the Rein-Sehgal and Berger-Sehgal PCAC based models at multi-GeV $ν_μ$ energies and at produced $π^{+}$ energies and angles, $E_π>1$ GeV and $θ_π<10^{\circ}$. Measurements of the cross-section ratios of Fe and Pb relative to CH reveal the effective $A$-scaling to increase from an approximate $A^{1/3}$ scaling at few GeV to an $A^{2/3}$ scaling for $E_ν>10$ GeV.
description: 8 pages, 6 figures and 60 pages of supplemental material. Updated to accepted version, with ancillary files of the cross section data
Evidence for a spinon Fermi surface in the triangular S=1 quantum spin liquid Ba$_3$NiSb$_2$O$_9$
Creators: name: Fak, B.
name: Bieri, S.
name: Canevet, E.
name: Messio, L.
name: Payen, C.
name: Viaud, M.
name: Guillot-Deudon, C.
name: Darie, C.
name: Ollivier, J.
name: Mendels, P.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Inelastic neutron scattering is used to study the low-energy magnetic excitations in the spin-1 triangular lattice of the 6H-B phase of Ba$_3$NiSb$_2$O$_9$. We study two powder samples: Ba$_3$NiSb$_2$O$_9$ synthesized under high pressure and Ba$_{2.5}$Sr$_{0.5}$NiSb$_2$O$_9$ in which chemical pressure stabilizes the 6H-B structure. The measured excitation spectra show broad gapless and nondispersive continua at characteristic wave vectors. Our data rules out most theoretical scenarios that have previously been proposed for this phase, and we find that it is well described by an exotic quantum spin liquid with three flavors of unpaired fermionic spinons, forming a large spinon Fermi surface.
description: 4+9 pages, 4 figures; published version
Enumerazione della Microflora Autoctona e Monitoraggio dei Batteri di Interesse Alimentare nel Salame Artigianale
Creators: name: Dambra, L.
Publisher: name: Zenodo
Year: 2021
Subjects: artisanal foods
contamination

description: MSc thesis for Corso di Laurea Magistrale in SICUREZZA E QUALITA’ DELLE PRODUZIONI ANIMALI, University of Bologna (in Italian).
Uphill in reaction-diffusion multi-species interacting particles systems
Creators: name: Casini, Francesco
name: Giardina, Cristian
name: Vernia, Cecilia
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mathematical Physics (math-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Probability (math.PR)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We study reaction-diffusion processes with multi-species of particles and hard-core interaction. We add boundary driving to the system by means of external reservoirs which inject and remove particles, thus creating stationary currents. We consider the condition that the time evolution of the average occupation evolves as the discretized version of a system of coupled diffusive equations with linear reactions. In particular, we identify a specific one-parameter family of such linear reaction-diffusion systems where the hydrodynamic limit behaviour can be obtained by means of a dual process. We show that partial uphill diffusion is possible for the discrete particle systems on the lattice, whereas it is lost in the hydrodynamic limit.
description: 26 pages, 3 figures
Widow's weeds : performing absence through material gestures
Creators: name: McDonald, Martha.
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.
Phenotypic Characterization of Peripheral B cells in Mycobacterium tuberculosis infection and disease in Addis Ababa, Ethiopia
Creators: name: Girma, Tigist
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2018

description: Background: Mycobacterium tuberculosis (MTB) remains an unresolved threat resulting in great annual loss of life. The role of B cells during the protective immunity to MTB is still unclear. B cells have been described as effector cells in addition to their role as antibody producing cells during disease. Objective: to identify and characterize the frequency of peripheral B-cell subpopulations during active and latent tuberculosis. Methods: A total of 52 participants comprising 16 active untreated pulmonary TB (PTB) cases, 17 Latent Tuberculosis Infection (LTBI), and 19 Healthy Controls (HCs) were enrolled in the study. Peripheral blood samples were collected to do QuantiFERON (QFT) assay to diagnose LTBI and to isolate Peripheral Blood Mononuclear Cells (PBMC). PBMCs were stained with monoclonal antibodies. Expressions Cluster of differentiation (CD) markers was assessed on B cells subsets using multicolor flowcytometry. A difference in the frequency of B cell subsets among the groups was analyzed using the One-way Anova and Kruskal-Wallis tests was used for comparison between two groups. Data is presented as median (Interquartile range) and a P value of less than 0.05% was taken as a statistically significant difference. Results: Tissue-like memory B cells (CD19+CD27-CD21-); p = 0.0024 and class switched memory B cells (CD19+CD27+CD21+ IgM- IgD-); p = 0.0065 had significantly higher proportion in active PTB when compared to LTBI and HCs. On the contrary, resting memory B cells (CD19+CD27+CD21+); p <.0001, non-class switched memory B cells (CD19+CD27+CD21+ IgM+ IgD+); p = 0.0011, marginal zone B cells (MZCs) (CD19+CD27+CD21+IgM+IgD+CD23-); p = <0.0001 and regulatory B cells (Breg) (CD19+CD24hiCD38hiCD5+); p = 0.0043 had significantly lower proportion in active PTB group as compared to LTBI and HCs. There were no statistically significant difference observed in percentage of total B cells (CD19+); p = 02407, Naïve B cells (CD19+CD27-CD21+); p = 0.1156 and activated memory B cells (CD19+CD27+CD21-); p = 0.1134 among the three study groups. Conclusions: The findings of this study showed that B cells markers distinguish active untreated TB cases from LTBI, that indicate B cells phenotype is promising for clinical application as potential biomarker for TB disease and LTBI identification. A large scale longitudinal study is required to confirm and translate this finding into clinically applicable tests.
Comment on "Time delays in molecular photoionization"
Creators: name: Baykusheva, D.
name: Wörner, H. J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: In a recent article by P. Hockett \textit{et al.}, time delays arising in the context of molecular single-photon ionization are investigated from a theoretical point of view. We argue that one of the central equations derived in the paper is incorrect and present a reformulation that is consistent with the established treatment of angle-dependent scattering delays.
description: 2 pages, submitted to J. Phys. B on September 4, 2016
Determinants of Brand Equity in Higher Education: the case of private Universities in Addis Ababa
Creators: name: Mandefro, Mahlet
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2017

description: The primary objective of this study was to investigate determinants of CBBE in Higher Education, particularly in private Universities in Addis Ababa. The research adopted an exploratory research approach and questionnaires were administered to gather research data. Samples of 385 students from the four private universities in Addis Ababa were contacted. Out of the 385 questionnaires distributed, 360 were deemed valid. The scale constructed to measure consumer-based brand equity included brand awareness and brand image captured through Product Attributes, Service Attributes and Symbolic Attributes. The findings established that image related attributes particularly, Service Attributes and Symbolic Attributes proved to be very essential and are predictors of brand equity of Higher Education Institutions' (HEI) particularly in the case of private Universities in Addis Ababa. On the contrary, Brand awareness attributes had no significant impact on ratings of brand equity. This study contributes to the scant literature testing the applicability of customer-based brand equity in the educational sector specifically in Ethiopia. Since private university education is of significant importance as it accounts for approximately over 25 percent of the country's undergraduate enrollments, the study provides an insight into the Ethiopian university students' perceptions of the different attributes of overall brand equity. The study was limited to only private universities, thus, future research should attempt to examine brand equity across many different areas of the Higher education sector in Ethiopia. Also, instead of overreliance of developed scales, there would be the need to create industry-specific scales in accordance with the specific research setting as scales developed for one empirical setting may not apply to another. Studies like this can help practitioners analyze the value of their brands as well as their competitors', develop their marketing strategies and marketing communications plans, and in building and managing their brands more effectively. Similar studies can also be used for longitudinal brand health checks and to evaluate the effectiveness of advertising and branding campaigns and events.
Interplay of non-symmorphic symmetry and spin-orbit coupling in hyperkagome spin liquids: Applications to Na$_4$Ir$_3$O$_8$
Creators: name: Huang, Biao
name: Kim, Yong Baek
name: Lu, Yuan-Ming
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Na$_4$Ir$_3$O$_8$ provides a material platform to study three-dimensional quantum spin liquids in the geometrically frustrated hyperkagome lattice of Ir$^{4+}$ ions. In this work, we consider quantum spin liquids on hyperkagome lattice for generic spin models, focusing on the effects of anisotropic spin interactions. In particular, we classify possible $\mathbb{Z}_2$ and $U(1)$ spin liquid states, following the projective symmetry group analysis in the slave-fermion representation. There are only three distinct $\mathbb{Z}_2$ spin liquids, together with 2 different $U(1)$ spin liquids. The non-symmorphic space group symmetry of hyperkagome lattice plays a vital role in simplifying the classification, forbidding "$π$-flux" or "staggered-flux" phases in contrast to symmorphic space groups. We further prove that both $U(1)$ states and one $Z_2$ state among all 3 are symmetry-protected gapless spin liquids, robust against any symmetry-preserving perturbations. Motivated by the "spin-freezing" behavior recently observed in Na$_4$Ir$_3$O$_8$ at low temperatures, we further investigate the nearest-neighbor spin model with dominant Heisenberg interaction subject to all possible anisotropic perturbations from spin-orbit couplings. We found a $U(1)$ spin liquid ground state with spinon fermi surfaces is energetically favored over $Z_2$ states. Among all spin-orbit coupling terms, we show that only Dzyaloshinskii-Moriya (DM) interaction can induce spin anisotropy in the ground state when perturbing from the isotropic Heisenberg limit. Our work paves the way for a systematic study of quantum spin liquids in various materials with a hyperkagome crystal structure.
description: 27 pages, 9 figures, reference updated
Observational and Physical Classification of Supernovae
Creators: name: Gal-Yam, Avishay
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: This chapter describes the current classification scheme of supernovae (SNe). This scheme has evolved over many decades and now includes numerous SN Types and sub-types. Many of these are universally recognized, while there are controversies regarding the definitions, membership and even the names of some sub-classes; we will try to review here the commonly-used nomenclature, noting the main variants when possible. SN Types are defined according to observational properties; mostly visible-light spectra near maximum light, as well as according to their photometric properties. However, a long-term goal of SN classification is to associate observationally-defined classes with specific physical explosive phenomena. We show here that this aspiration is now finally coming to fruition, and we establish the SN classification scheme upon direct observational evidence connecting SN groups with specific progenitor stars. Observationally, the broad class of Type II SNe contains objects showing strong spectroscopic signatures of hydrogen, while objects lacking such signatures are of Type I, which is further divided to numerous subclasses. Recently a class of super-luminous SNe (SLSNe, typically 10 times more luminous than standard events) has been identified, and it is discussed. We end this chapter by briefly describing a proposed alternative classification scheme that is inspired by the stellar classification system. This system presents our emerging physical understanding of SN explosions, while clearly separating robust observational properties from physical inferences that can be debated. This new system is quantitative, and naturally deals with events distributed along a continuum, rather than being strictly divided into discrete classes. Thus, it may be more suitable to the coming era where SN numbers will quickly expand from a few thousands to millions of events.
description: Extended final draft of a chapter in the "SN Handbook". Comments most welcome
Centralized Feature Pyramid for Object Detection
Creators: name: Quan, Yu
name: Zhang, Dong
name: Zhang, Liyan
name: Tang, Jinhui
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Visual feature pyramid has shown its superiority in both effectiveness and efficiency in a wide range of applications. However, the existing methods exorbitantly concentrate on the inter-layer feature interactions but ignore the intra-layer feature regulations, which are empirically proved beneficial. Although some methods try to learn a compact intra-layer feature representation with the help of the attention mechanism or the vision transformer, they ignore the neglected corner regions that are important for dense prediction tasks. To address this problem, in this paper, we propose a Centralized Feature Pyramid (CFP) for object detection, which is based on a globally explicit centralized feature regulation. Specifically, we first propose a spatial explicit visual center scheme, where a lightweight MLP is used to capture the globally long-range dependencies and a parallel learnable visual center mechanism is used to capture the local corner regions of the input images. Based on this, we then propose a globally centralized regulation for the commonly-used feature pyramid in a top-down fashion, where the explicit visual center information obtained from the deepest intra-layer feature is used to regulate frontal shallow features. Compared to the existing feature pyramids, CFP not only has the ability to capture the global long-range dependencies, but also efficiently obtain an all-round yet discriminative feature representation. Experimental results on the challenging MS-COCO validate that our proposed CFP can achieve the consistent performance gains on the state-of-the-art YOLOv5 and YOLOX object detection baselines.
description: Code: https://github.com/QY1994-0919/CFPNet
Random amenable $\mathrm{C}^*$-algebras
Creators: name: Jacelon, Bhishan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Operator Algebras (math.OA)
subject: FOS: Mathematics
subject: 46L05, 46L35, 60G50, 60J10, 05C80, 05C81

description: What is the probability that a random UHF algebra is of infinite type? What is the probability that a random simple AI algebra has at most $k$ extremal traces? What is the expected value of the radius of comparison of a random Villadsen-type AH algebra? What is the probability that such an algebra is $\mathcal{Z}$-stable? What is the probability that a random Cuntz-Krieger algebra is purely infinite and simple, and what can be said about the distribution of its $K$-theory? By constructing $\mathrm{C}^*$-algebras associated with suitable random (walks on) graphs, we provide context in which these are meaningful questions with computable answers.
description: This version of the article appears in the Mathematical Proceedings of the Cambridge Philosophical Society
Tests for Gaussianity of the MAXIMA-1 Cosmic Microwave Background Map
Creators: name: Balbi, A.
name: Borrill, J.
name: Ferreira, P. G.
name: Hanany, S.
name: Wu, J. H. P.
Publisher: name: The American Physical Society
Year: 2001
Subjects: subject: 530

description: Physical Review Letters
Electromagnetic signatures of the chiral anomaly in Weyl semimetals
Creators: name: Barnes, Edwin
name: Heremans, J. J.
name: Minic, Djordje
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Weyl semimetals are predicted to realize the three-dimensional axial anomaly first discussed in particle physics. The anomaly leads to unusual transport phenomena such as the chiral magnetic effect in which an applied magnetic field induces a current parallel to the field. Here we investigate diagnostics of the axial anomaly based on the fundamental equations of axion electrodynamics. We find that materials with Weyl nodes of opposite chirality and finite energy separation immersed in a uniform magnetic field exhibit an anomaly-induced oscillatory magnetic field with a period set by the chemical potential difference of the nodes. In the case where a chemical potential imbalance is created by applying parallel electric and magnetic fields, we find a suppression of the magnetic field component parallel to the electric field inside the material for rectangular samples, suggesting that the chiral magnetic current opposes this imbalance. For cylindrical geometries, we instead find an enhancement of this magnetic field component along with an anomaly-induced azimuthal component. We propose experiments to detect such magnetic signatures of the axial anomaly.
description: 5 pages, 2 figures
Batavia : an interpretation in contemporary textiles of the shipwreck of the Batavia, Western Australia, in 1629
Creators: name: Piesse, Melinda.
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.
Transport in vertically stacked hetero-structures from 2D materials
Creators: name: Chen, Fan
name: Ilatikhameneh, Hesameddin
name: Tan, Yaohua
name: Valencia, Daniel
name: Klimeck, Gerhard
name: Rahman, Rajib
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In this work, the transport of tunnel field-effect transistor (TFET) based on vertically stacked hereto-structures from 2D transition metal dichalcogenide (TMD) materials is investigated by atomistic quantum transport simulations. WTe2-MoS2 combination was chosen due to the formation of a broken gap hetero-junction which is desirable for TFETs. There are two assumptions behind the MoS2-WTe2 hetero-junction tight binding (TB) model: 1) lattice registry. 2) The $S-Te$ parameters being the average of the $S-S$ and $Te-Te$ parameters of bilayer MoS2 and WTe2. The computed TB bandstructure of the hetero-junction agrees well with the bandstructure obtained from density functional theory (DFT) in the energy range of interest for transport. NEGF (Non-Equilibrium Green$'$s Function) equations within the tight binding description is then utilized for device transfer characteristic calculation. Results show 1) energy filtering is the switching mechanism; 2) the length of the extension region is critical for device to turn off; 3) MoS2-WTe2 interlayer TFET can achieve a large on-current of $1000 μA/μm$ with $V_{DD} = 0.3V$, which suggests interlayer TFET can solve the low ON current problem of TFETs and can be a promising candidate for low power applications.
description: 2016 ICPS proceeding
Constraining some Horndeski gravity theories
Creators: name: Bhattacharya, Sourav
name: Chakraborty, Sumanta
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 discuss two spherically symmetric solutions admitted by the Horndeski (or scalar tensor) theory in the context of solar system and astrophysical scenarios. One of these solutions is derived for Einstein-Gauss-Bonnet gravity, while the other originates from the coupling of the Gauss-Bonnet invariant with a scalar field. Specifically, we discuss the perihelion precession and the bending angle of light for these two different spherically symmetric spacetimes derived in references \cite{Maeda:2006hj} and \cite{Sotiriou:2014pfa} respectively. The later in particular, applies only to the black hole spacetimes. We further delineate on the numerical bounds of relevant parameters of these theories from such computations.
description: v2, 14pp; title changed, added references and discussions; improved presentation; accepted in PRD
Linear scaling of lepton charge asymmetry in $W^\pm$ production in ultra-relativistic nuclear collisions
Creators: name: Lei, An-Ke
name: Zhou, Dai-Mei
name: Yan, Yu-Liang
name: Zhang, Xiao-Ming
name: Zheng, Liang
name: Wang, Du-Juan
name: Li, Xiao-Mei
name: Chen, Gang
name: Cai, Xu
name: Sa, Ben-Hao
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The lepton charge asymmetry in $W^\pm$ production in the nuclear collisions at $\sqrt{s_{\rm NN}}=5.02$ TeV is investigated with a parton and hadron cascade model PACIAE. Recently published ALICE and the ATLAS data of lepton charge asymmetry are well reproduced. An interesting linear scaling behavior is observed in the lepton charge asymmetry as a function of the collision system valence quark number asymmetry among the different size of nuclear collision systems at $\sqrt{s_{\rm NN}}=5.02$ TeV. This linear scaling behavior may serve as an additional constraint on the PDF (nPDF) extractions.
description: 6 pages, 4 figures. arXiv admin note: text overlap with arXiv:2201.09525
First-principles study on magnetic tunneling junctions with semiconducting CuInSe${}_{2}$ and CuGaSe${}_{2}$ barriers
Creators: name: Masuda, Keisuke
name: Miura, Yoshio
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We theoretically investigate two different magnetic tunneling junctions (MTJs) with semiconductor barriers, CuInSe${}_{2}$ (CIS) and CuGaSe${}_{2}$ (CGS), which are the terminal compounds of recently reported mixed semiconductor barrier, CuIn${}_{1-x}$Ga$_{\it x}$Se${}_{2}$. To discuss the transport properties of these systems, we analyze complex band structures, magnetoresistance (MR) ratios, and resistance-area products ($RA$) by using first-principles based calculations in combination with the Landauer formula. It is found that the $Δ_{1}$ wave functions have dominant contributions to the spin-dependent tunneling transport in both CIS- and CGS-based MTJs. We also find that the CGS-based MTJ has a much larger MR ratio and slightly higher $RA$ than those of the CIS-based MTJ, which indicates that a larger MR ratio is expected for a higher Ga concentration $x$ in the CuIn${}_{1-x}$Ga${}_{x}$Se${}_{2}$-based MTJs. We further study the relationship between the band gaps in the barriers and MR ratios by changing the Coulomb repulsions in the Cu 3$d$ states of the CIS and CGS. It is shown that the barrier with a larger band gap yields a larger MR ratio. The comparison of MR ratios and $RA$ between the CIS-, CGS-, and MgO-based MTJs are also given.
description: 10 pages, 4 figures
Explanations as Programs in Probabilistic Logic Programming
Creators: name: Vidal, Germán
Publisher: name: arXiv
Year: 2022
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Logic in Computer Science (cs.LO)
subject: Programming Languages (cs.PL)
subject: FOS: Computer and information sciences

description: The generation of comprehensible explanations is an essential feature of modern artificial intelligence systems. In this work, we consider probabilistic logic programming, an extension of logic programming which can be useful to model domains with relational structure and uncertainty. Essentially, a program specifies a probability distribution over possible worlds (i.e., sets of facts). The notion of explanation is typically associated with that of a world, so that one often looks for the most probable world as well as for the worlds where the query is true. Unfortunately, such explanations exhibit no causal structure. In particular, the chain of inferences required for a specific prediction (represented by a query) is not shown. In this paper, we propose a novel approach where explanations are represented as programs that are generated from a given query by a number of unfolding-like transformations. Here, the chain of inferences that proves a given query is made explicit. Furthermore, the generated explanations are minimal (i.e., contain no irrelevant information) and can be parameterized w.r.t. a specification of visible predicates, so that the user may hide uninteresting details from explanations.
description: Published as: Vidal, G. (2022). Explanations as Programs in Probabilistic Logic Programming. In: Hanus, M., Igarashi, A. (eds) Functional and Logic Programming. FLOPS 2022. Lecture Notes in Computer Science, vol 13215. Springer, Cham. The final authenticated publication is available online at https://doi.org/10.1007/978-3-030-99461-7_12