cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Public Service Delivery Reform and Customer Satisfaction: The Case of Social Security Agency (SSA) And Document Authentication And Registration Office (DARO)
Creators: name: Tesfaw, Desta
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2008

description: Public service delivery has become the central focus of recent Public Sector Reforms (PSRs) throughout the world. The public service reform program is one of the components of the Ethiopian civil service reform program. The overall objective of this study is to identify and analyze the factors that determine the success and failure of the public service delivery reform in relation to customer satisfaction. The study has used the case study method by selecting two case organizations namely Social Security Agency (SSA) and Document Authentication and Registration Office (DARO). The data have been collected from primary and secondary sources through interview, questionnaire, observation and document reviewing. Based on the conceptual frame, the data have been presented and analyzed through comparative analysis of the case organizations. The findings of the analysis show that the two case organizations are different in satisfying customers in service delivery i.e. DARO satisfied its customers better than SSA. This study reveals that the differences in performance between the two case organizations are the result of organizational and motivational factors. The major organizational factors are vision and mission, service standards, customer complaint handling mechanisms, reengineering of working processes and application of Information Communication Technology (ICT). The major staff motivational factors are training, communication, performance appraisal and reward system, delegation for decision making and physical facilities. This study therefore concludes that these factors should be fulfilled at the organizational level to satisfy customers through public service delivery.
Dynamic Modeling for the Design and Cyclic Operation of an Atomic Layer Deposition (ALD) Reactor
Creators: name: Travis, Curtisha D.
name: Adomaitis, Raymond A.
Publisher: name: MDPI
Year: 2013
Subjects: atomic layer deposition
ALD
alumina
heterogeneous reaction kinetics
reaction mechanism
transition state theory
limit-cycle
reactor dynamics
time discretization
growth-per-cycle

description: A laboratory-scale atomic layer deposition (ALD) reactor system model is derived for alumina deposition using trimethylaluminum and water as precursors. Model components describing the precursor thermophysical properties, reactor-scale gas-phase dynamics and surface reaction kinetics derived from absolute reaction rate theory are integrated to simulate the complete reactor system. Limit-cycle solutions defining continuous cyclic ALD reactor operation are computed with a fixed point algorithm based on collocation discretization in time, resulting in an unambiguous definition of film growth-per-cycle (𝑔𝑝𝑐). A key finding of this study is that unintended chemical vapor deposition conditions can mask regions of operation that would otherwise correspond to ideal saturating ALD operation. The use of the simulator for assisting in process design decisions is presented.
Small Molecule Inhibitors of AI-2 Signaling in Bacteria: State-of-the-Art and Future Perspectives for Anti-Quorum Sensing Agents
Creators: name: Guo, Min
name: Gamby, Sonja
name: Zheng, Yue
name: Sintim, Herman O.
Publisher: name: MDPI
Year: 2013
Subjects: quorum sensing
virulence
biofilm formation
bacteria
autoinducer
antagonists
AI-2

description: Bacteria respond to different small molecules that are produced by other neighboring bacteria. These molecules, called autoinducers, are classified as intraspecies (i.e., molecules produced and perceived by the same bacterial species) or interspecies (molecules that are produced and sensed between different bacterial species). AI-2 has been proposed as an interspecies autoinducer and has been shown to regulate different bacterial physiology as well as affect virulence factor production and biofilm formation in some bacteria, including bacteria of clinical relevance. Several groups have embarked on the development of small molecules that could be used to perturb AI-2 signaling in bacteria, with the ultimate goal that these molecules could be used to inhibit bacterial virulence and biofilm formation. Additionally, these molecules have the potential to be used in synthetic biology applications whereby these small molecules are used as inputs to switch on and off AI-2 receptors. In this review, we highlight the state-of-the-art in the development of small molecules that perturb AI-2 signaling in bacteria and offer our perspective on the future development and applications of these classes of molecules.
The Contributions of Urban Agriculture in Alleviating Food Insecurity of Poor Urban Households: Evidence from Selected Kebles of Akaki-Kaliti Sub- City, Addis Ababa
Creators: name: Berhe, Sophia
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2015

description: Urban agriculture has food security, economic, social and environmental impacts. The focus of this study was on food security of poor urban households. The purpose of this comparative study was to investigate the contributions of urban agriculture in alleviating urban household food insecurity in Akaki-Kaliti Sub-city. The study's target population is composed of both urban poor households engaging in urban agriculture and those who are not engaging in urban agriculture. The study sought to investigate the relationship amongst the different dimensions of food security and the households' status in relation to engagement in urban agriculture along with their average daily income. Both quantitative and qualitative methodologies were employed in the study whereby structured questionnaires were prepared for the survey of randomly selected 100 urban poor households with similar socio-economic status. Discussions were also made with the purposively selected key informants and urban agriculture stakeholders in Akaki- Kaliti sub-City. Data analyses were made by using 'IBM SPSS Statistics 20'. Data results were interpreted. The result of the study revealed that one in two of the households sampled from both low incomes unemployed owners engage in at least one form of farming. The result also indicated that households who engage in farming have earned food and cash income; this has contributed both in improving household food security by improving food availability (50%) and nutrition, measured by proxy, of variety of food intake at household level (50%). The study concludes with the policy advice that government support to poor households should include interventions that can improve the variety and productivity of farms at household levels. The stakeholders that involve in urban agriculture and waste management should integrate their support towards improving the productivity of urban agriculture at household and community levels. These together are assumed to improve both the productivity and variety of farming as well as greener ways, in ways that proactively and efficiently manage urban waste
Reflections : corporeal space, identity and the male form within sculptural glass
Creators: name: King, Brent.
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.
Amtliche Mitteilungen der Universität Dortmund Nr. 42
Creators: name: (:Unkn) Unknown
Publisher: name: Universität Dortmund
Year: 1974
Subjects: subject: 080

description: Nachträgliche Genehmigung des §28 der Diplomprüfungsordnung für die Abteilung Mathematik
description: Studienordnung für die Abteilung Fertigungstechnik für das Lehramt an berufsbildenden Schulen
description: Verlängerung der Genehmigungsfrist der vorläufigen Diplom-Prüfungsordnung der Abteilung Fertigungstechnik
description: Verlängerung der Genehmigungsfristen der vorläufigen Diplomprüfungsordnung und der vorläufigen Promotionsordnung der Abteilung Statistik
description: Amtliche Mitteilungen der Universität Dortmund ; 42
Luminosity dependence of the cyclotron line and evidence for the accretion regime transition in V 0332+53
Creators: name: Doroshenko, Victor
name: Tsygankov, Sergey S.
name: Mushtukov, Alexander A.
name: Lutovinov, Alexander A.
name: Santangelo, Andrea
name: Suleimanov, Valery F.
name: Poutanen, Juri
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report on the analysis of NuSTAR observations of the Be-transient X-ray pulsar V 0332+53 during the giant outburst in 2015 and another minor outburst in 2016. We confirm the cyclotron-line energy-luminosity correlation previously reported in the source and the line energy decrease during the giant outburst. Based on 2016 observations, we find that a year later the line energy has increased again essentially reaching the pre-outburst values. We discuss this behaviour and conclude that it is likely caused by a change of the emission region geometry rather than previously suggested accretion-induced decay of the neutron stars magnetic field. At lower luminosities, we find for the first time a hint of departure from the anticorrelation of line energy with flux, which we interpret as a transition from super- to sub-critical accretion associated with the disappearance of the accretion column. Finally, we confirm and briefly discuss the orbital modulation observed in the outburst light curve of the source.
description: added journal reference&doi for proper indexing
Effects Of Alcoholic Beverage Advertisements On The Drinking Behavior Of The Youth: A Case Study Of Addis Ababa
Creators: name: Mekonnen, Senait
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2019

description: Measuring the effect of advertisement in the drinking behavior of the youth is very essential for alcohol manufacturing companies as they are part of the community and that they should be care for the social aspect of their marketing. Advertisement should create positive impression over the customer's positive behavior towards the majority or all of consumers' consumption preference; if not all resources such as money, time, and effort spent on advertisement will go in vain when it comes to social responsibility. The study aims to explore the effect of advertisement on the drinking behavior of the youth in Addis Ababa. It followed a deductive form of research approach and the research design was explanatory. Questionnaires were used to collect primary data by using a self-administered data collection system from 384 respondents, out of which 371 valid questionnaires were collected and analyzed. These respondents were selected by using a non-probability sampling technique, which is Judgment Sampling method. The data were analyzed using descriptive statistics (frequency, percentage) and inferential statistics like correlation and multiple regressions. The finding revealed that there are positive and significant relationships between media exposure, message content and drinking behavior of the youth in Addis Ababa. Eventually, this study recommends appropriate actions for companies in refining their advertising strategies as a means of overcoming the intense competition that exist in the market, in the mean time caring for the community specially the youth or the new generation to not be a victim of their advertisement.
Symmetries Shared by the Poincaré Group and the Poincaré Sphere
Creators: name: Kim, Young S.
name: Noz, Marilyn E.
Publisher: name: MDPI
Year: 2013
Subjects: Poincaré group
Poincaré sphere
Wigner's little groups
particle mass
decoherence mechanism
two-by-two representations
Lorentz group

description: Henri Poincaré formulated the mathematics of Lorentz transformations, known as the Poincaré group. He also formulated the Poincaré sphere for polarization optics. It is shown that these two mathematical instruments can be derived from the two-by-two representations of the Lorentz group. Wigner’s little groups for internal space-time symmetries are studied in detail. While the particle mass is a Lorentz-invariant quantity, it is shown to be possible to address its variations in terms of the decoherence mechanism in polarization optics.
EpiCUM as best practices of interdisciplinarity for digital epigraphy storytelling
Creators: name: Prado, Francesca
name: Spampinato, Daria
name: Cristofaro, Salvatore
name: Sichera, Pietro
Publisher: name: Zenodo
Year: 2023
Subjects: Epigraphs, Cultural Heritage, Digital Epigraphy, Digital Humanities, EpiDoc, Ontologies

description: The project EpiCUM is a good example of wise interdisciplinary collaboration between different entities, that has allowed the construction of a strong dialogue between education, heritage enhancement and scientific research through the use of digital supported by philological correctness. EpiCUM aims at valorising the 574 epigraphs of the Castello Ursino Museum in order to make them usable by different kinds of users. Some tasks actively involved the students of the High School, conjugating nicely the theoretical and practical approaches, although they were not familiar with epigraphy and ancient languages. An international scientific conference was also organized within the project. EpiCUM is conveyed through http://epicum.istc.cnr.it, that is realized as easily accessible, attractive and of robust scientific value. Indeed, besides a reproduction of the multimedia kiosk located within the Museum, the web portal provides a number of advanced search tools for accessing and querying data related to the epigraphic slabs. All epigraphic information has been organized in interoperable open formats and models, according to the EpiDoc schema (in XML and JSON), and in RDF/OWL ontologies based on the CIDOC-CRM. Moreover, for data-revision purposes, within the project there have been involved university internship activities focused on the digital. Making data available on the web was a “prophetic” choice that has allowed, especially during the pandemic period, the continuation of a doctoral collaboration about the study of new epigraphic aspects (symbols, onomastics, prosopographical data), the translation of the inscriptions and the achievement of new discoveries.
Amtliche Mitteilungen der Universität Dortmund Nr. 05/79
Creators: name: (:Unkn) Unknown
Publisher: name: Universität Dortmund
Year: 1979
Subjects: subject: 080

description: Diplomprüfungsordnung der Abteilung Mathematik
description: Amtliche Mitteilungen der Universität Dortmund ; 5, 1979
Fermionic correlation functions from randomized measurements in programmable atomic quantum devices
Creators: name: Naldesi, Piero
name: Elben, Andreas
name: Minguzzi, Anna
name: Clément, David
name: Zoller, Peter
name: Vermersch, Benoît
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We provide a measurement protocol to estimate 2- and 4-point fermionic correlations in ultra-cold atom experiments. Our approach is based on combining random atomic beam splitter operations, which can be realized with programmable optical landscapes, with high-resolution imaging systems such as quantum gas microscopes. We illustrate our results in the context of the variational quantum eigensolver algorithm for solving quantum chemistry problems.
Locality-Sensitive Hashing without False Negatives for l_p
Creators: name: Pacuk, Andrzej
name: Sankowski, Piotr
name: Wegrzycki, Karol
name: Wygocki, Piotr
Publisher: name: arXiv
Year: 2016
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Computer and information sciences
subject: F.2.2; G.3

description: In this paper, we show a construction of locality-sensitive hash functions without false negatives, i.e., which ensure collision for every pair of points within a given radius $R$ in $d$ dimensional space equipped with $l_p$ norm when $p \in [1,\infty]$. Furthermore, we show how to use these hash functions to solve the $c$-approximate nearest neighbor search problem without false negatives. Namely, if there is a point at distance $R$, we will certainly report it and points at distance greater than $cR$ will not be reported for $c=Ω(\sqrt{d},d^{1-\frac{1}{p}})$. The constructed algorithms work: - with preprocessing time $\mathcal{O}(n \log(n))$ and sublinear expected query time, - with preprocessing time $\mathcal{O}(\mathrm{poly}(n))$ and expected query time $\mathcal{O}(\log(n))$. Our paper reports progress on answering the open problem presented by Pagh [8] who considered the nearest neighbor search without false negatives for the Hamming distance.
description: 11 pages, 2 figures, COCOON 2016
Amtliche Mitteilungen der Universität Dortmund Nr. 13/80
Creators: name: (:Unkn) Unknown
Publisher: name: Universität Dortmund
Year: 1980
Subjects: subject: 080

description: Änderung der Diplomprüfungsordnung Abteilung Wirtschafts- und Sozialwissenschaften
description: Änderung der Diplomprüfungsordnung der Abteilung Maschinenbau
description: Amtliche Mitteilungen der Universität Dortmund ; 13, 1980
Projecting 3D color codes onto 3D toric codes
Creators: name: Aloshious, Arun B.
name: Sarvepalli, Pradeep Kiran
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Toric codes and color codes are two important classes of topological codes. Kubica, Yoshida, and Pastawski showed that any $D$-dimensional color code can be mapped to a finite number of toric codes in $D$-dimensions. In this paper we propose an alternate map of 3D color codes to 3D toric codes with a view to decoding 3D color codes. Our approach builds on Delfosse's result for 2D color codes and exploits the topological properties of these codes. Our result reduces the decoding of 3D color codes to that of 3D toric codes. Bit flip errors are decoded by projecting on one set of 3D toric codes while phase flip errors are decoded by projecting onto another set of 3D toric codes.
description: LaTeX, 11 pages. Improved presentation, simplified proofs, main results unchanged
Determinants of Vehicles Buying Decision: in case of Addis Ababa
Creators: name: Jima, Cheru
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2018

description: Understanding the consumer behavior, what factors affect buying behavior and how buyers make a purchase decision helps to market the goods or services successfully. The main objective of this paper was to investigate determinants of vehicles buying decision. The hypothesis that consists of five independent variables and one dependent variable was developed in parallel with research questions and research objectives. The representatives of the study were taken from Addis Ababa using quota and convenience sampling. A total of 390 questionnaires were distributed to sub cities found in Addis Ababa and 378 were returned. But, 371 were valid and used for statistical analysis. Due to the nature of study undertaken, explanatory research design was used. Based on the exploration from theoretical and empirical review, private automobile owners were found to be purchase their Vehicles influenced by multiple factors. There were a positive and significant effect relationship between Price and vehicle buying decision with effect of (..=0.342) followed by brand of the car (with effect of ..=0.244), and social factor (with effect of ..=0.211). Conversely, there were no significant relationship between two variables that are cost of ownership (..=0.072) and feature of the car (..=0.057) and vehicle decision making. Expect p-value of feature of the car and cost of ownership, all the factors were significant with p-value less than p=0.05 but the p-value of feature of the car and cost of ownership were not less than the common alpha level of 0.05, which indicates that, statistically not significant. The regression analysis for this study specified that the independent variables are predictors of buying decision which is confirmed by R square 0.499. The factors predict the value of vehicles decision making by 50%. Price of the car, brand of the car and external factors were variables that highly considered by vehicle buyers during purchase decision making. The study revealed that cost of ownership and feature of the car are insignificant and don ft considered by buyers.
Instabilities Appearing in Cosmological Effective Field theories: When and How?
Creators: name: Eckmann, Jean-Pierre
name: Hassani, Farbod
name: Zaag, Hatem
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mathematical Physics (math-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Numerical Analysis (math.NA)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Analysis of PDEs (math.AP)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Nonlinear partial differential equations appear in many domains of physics, and we study here a typical equation which one finds in effective field theories (EFT) originated from cosmological studies. In particular, we are interested in the equation $\partial_t^2 u(x,t) = α(\partial_x u(x,t))^2 +β\partial_x^2 u(x,t)$ in $1+1$ dimensions. It has been known for quite some time that solutions to this equation diverge in finite time, when $α>0$. We study the nature of this divergence as a function of the parameters $α>0 $ and $β\ge0$. The divergence does not disappear even when $β$ is very large contrary to what one might believe (note that since we consider fixed initial data, $α$ and $β$ cannot be scaled away). But it will take longer to appear as $β$ increases when $α$ is fixed. We note that there are two types of divergence and we discuss the transition between these two as a function of parameter choices. The blowup is unavoidable unless the corresponding equations are modified. Our results extend to $3+1$ dimensions.
description: 19 pages, 5 figures; v2: minor revision, matches accepted version
Supplementary document for Coherent waveguide laser arrays in semiconductor quantum well membranes - 5744424.pdf
Creators: name: Woods, Jonathan
name: Gorecki, Jon
name: Bek, Roman
name: Richardson, Stephen
name: Daykin, Jake
name: Hooper, Grace
name: Branagan-Harris, Emelia
name: Tropper, Anne
name: Wilkinson, James
name: Jetter, Michael
Publisher: name: Optica Publishing Group
Year: 2022
Subjects: Uncategorized

description: Supplemental document
Galaxy Simulation with Dust Formation and Destruction
Creators: name: Aoyama, Shohei
name: Hou, Kuan-Chou
name: Shimizu, Ikkoh
name: Hirashita, Hiroyuki
name: Todoroki, Keita
name: Choi, Jun-Hwan
name: Nagamine, Kentaro
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We perform smoothed particle hydrodynamics (SPH) simulations of an isolated galaxy with a new treatment for dust formation and destruction. To this aim, we treat dust and metal production self-consistently with star formation and supernova feedback. For dust, we consider a simplified model of grain size distribution by representing the entire range of grain sizes with large and small grains. We include dust production in stellar ejecta, dust destruction by supernova (SN) shocks, grain growth by accretion and coagulation, and grain disruption by shattering. We find that the assumption of fixed dust-to-metal mass ratio becomes no longer valid when the galaxy is older than 0.2 Gyr, at which point the grain growth by accretion starts to contribute to the nonlinear rise of dust-to-gas ratio. As expected in our previous one-zone model, shattering triggers grain growth by accretion since it increases the total surface area of grains. Coagulation becomes significant when the galaxy age is greater than $\sim$ 1 Gyr: at this epoch the abundance of small grains becomes high enough to raise the coagulation rate of small grains. We further compare the radial profiles of dust-to-gas ratio $(\mathcal{D})$ and dust-to-metal ratio $(\mathcal{D}/Z)$ (i.e., depletion) at various ages with observational data. We find that our simulations broadly reproduce the radial gradients of dust-to-gas ratio and depletion. In the early epoch ($\lesssim 0.3$ Gyr), the radial gradient of $\mathcal{D}$ follows the metallicity gradient with $\mathcal{D}/Z$ determined by the dust condensation efficiency in stellar ejecta, while the $\mathcal{D}$ gradient is steeper than the $Z$ gradient at the later epochs because of grain growth by accretion. The framework developed in this paper is applicable to any SPH-based galaxy evolution simulations including cosmological ones.
description: 18 pages, 16 figures, published on MNRAS
Under the influence : painting after digital media
Creators: name: Migliacci, Michael J.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Amtliche Mitteilungen der Universität Dortmund Nr. 01/84
Creators: name: (:Unkn) Unknown
Publisher: name: Universität Dortmund
Year: 1984
Subjects: subject: 080

description: Benutzungsordnung der Patentschriften- und Normen-Auslegestelle der Universitätsbibliothek Dortmund gem. § 12 der Benutzungsordnung für die Zentralbibliothek der Universitätsbibliothek Dortmund
description: Benutzungsordnung für die Zentralbibliothek der Universitätsbibliothek Dortmund vom 21. 03. 1984
description: Schließfachordnung für die Zentralbibliothek der Universitätsbibliothek Dortmund gem. § 4 Abs. 2 der Benutzungsordnung für die Zentralbibliothek der Universitätsbibliothek Dortmund
description: Amtliche Mitteilungen der Universität Dortmund ; 1, 1984
Persistence of Li Induced Kondo Moments in the Superconducting State of Cuprates
Creators: name: Alloul, H.
name: Blanchard, N.
name: Bobroff, J.
name: MacFarlane, W. A.
name: Mendels, P.
Publisher: name: The American Physical Society
Year: 2001
Subjects: subject: 530

description: Physical Review Letters
Outreach Services and Sustainability: The Case of Amhara Credit and Saving Institution
Creators: name: Yehuwalashet, Fekadu
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2011

description: Now a day's microfinance is a useful means of intervention for development strategy for Ethiopia, to reduce poverty by reaching people who are unable to offer collateral for formal banking loans. In addition, at present, institutional sustainability is becoming the guiding principle for microfinance institutions. The issues of reaching the poorest of the poor and ensuring sustainability are among areas of ongoing debate in the microfinance sector. This study, therefore, was conducted to evaluate the overall outreach and sustainability performance of the Amhara Credit and Saving Institution using Debre Berhan Main Branch as a case study. In addition assessing whether outreach and sustainability achieved together, assess the socio-economic conditions of the customers of the institution and assess the clients attitude on the services of the institution were among the objectives. Data was obtained from two sub-branches of the institution. In order to collect the data 180 clients and the general manager, loan officers and field workers are selected as sample respondents. Both simple random sampling and convenient sampling methods were employed for questionnaire respondents and interviewee selection. To analyze both qualitative and quantitative analysis were used. Ratio analysis, trend analysis, SPSS and Ms-Excel computer programs in relation with tables and charts were important. The main thought the researcher used was the institutionalist approach that centered both achieving financial self-sufficiency and the number of clients served (breadth of outreach) as a main point. The result indicates that the institution has made its own positive contribution to the clients in relation to increase in wealth condition and gave priority to the rural poor women. Moreover, as the researcher expected, the output of the study also identified that there is no evidence of trade-off between outreach and sustainability, rather positive relationship was observed. Therefore, it institutional sustainability could be accomplished while reaching to the poorest sections of the society, that means both outreach and sustainability were achieved simultaneously.
Large-scale-vortex dynamos in planar rotating convection
Creators: name: Guervilly, Céline
name: Hughes, David W.
name: Jones, Chris A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: Several recent studies have demonstrated how large-scale vortices may arise spontaneously in rotating planar convection. Here we examine the dynamo properties of such flows in rotating Boussinesq convection. For moderate values of the magnetic Reynolds number ($100 \lesssim Rm \lesssim 550$, with $Rm$ based on the box depth and the convective velocity), a large-scale (i.e. system-size) magnetic field is generated. The amplitude of the magnetic energy oscillates in time, nearly out of phase with the oscillating amplitude of the large-scale vortex. The large-scale vortex is disrupted once the magnetic field reaches a critical strength, showing that these oscillations are of magnetic origin. The dynamo mechanism relies on those components of the flow that have length scales lying between that of the large-scale vortex and the typical convective cell size; smaller-scale flows are not required. The large-scale vortex plays a crucial role in the magnetic induction despite being essentially two-dimensional; we thus refer to this dynamo as a large-scale-vortex dynamo. For larger magnetic Reynolds numbers, the dynamo is small scale, with a magnetic energy spectrum that peaks at the scale of the convective cells. In this case, the small-scale magnetic field continuously suppresses the large-scale vortex by disrupting the correlations between the convective velocities that allow it to form. The suppression of the large-scale vortex at high $Rm$ therefore probably limits the relevance of the large-scale-vortex dynamo to astrophysical objects with moderate values of $Rm$, such as planets. In this context, the ability of the large-scale-vortex dynamo to operate at low magnetic Prandtl numbers is of great interest.
description: 28 pages, 17 figures, accepted for publication in J. Fluid Mech
Decomposition Mechanisms and Kinetics of Novel Energetic Molecules BNFF-1 and ANFF-1: Quantum-Chemical Modeling
Creators: name: Tsyshevsky, Roman V.
name: Kuklja, Maija M.
Publisher: name: MDPI
Year: 2013
Subjects: molecular materials
high explosives
LLM-175
LLM-172
heterocycles
activation barrier and transition state
density functional theory

description: Decomposition mechanisms, activation barriers, Arrhenius parameters, and reaction kinetics of the novel explosive compounds, 3,4-bis(4-nitro-1,2,5-oxadiazol-3-yl)-1,2,5-oxadiazole (BNFF-1), and 3-(4-amino-1,2,5-oxadiazol-3-yl)-4-(4-nitro-1,2,5-oxadiazol-3-yl)-1,2,5-oxadiazole (ANFF-1) were explored by means of density functional theory with a range of functionals combined with variational transition state theory. BNFF-1 and ANFF-1 were recently suggested to be good candidates for insensitive high energy density materials. Our modeling reveals that the decomposition initiation in both BNFF-1 and ANFF-1 molecules is triggered by ring cleavage reactions while the further process is defined by a competition between two major pathways, the fast C-NO2 homolysis and slow nitro-nitrite isomerization releasing NO. We discuss insights on design of new energetic materials with targeted properties gained from our modeling.
Rigidity of bordered polyhedral surfaces
Creators: name: Ba, Te
name: Li, Shengyu
name: Xu, Yaping
Publisher: name: arXiv
Year: 2022
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 52C25, 52C26, 51M04, 51M09

description: This paper investigates the rigidity of bordered polyhedral surfaces. Using the variational principle, we show that bordered polyhedral surfaces are determined by boundary value and discrete curvatures on the interior edges. As a corollary, we reprove the classical result that two Euclidean cyclic polygons (or hyperbolic cyclic polygons) are congruent if the lengths of their sides are equal.
Selenium Supranutrition: Are the Potential Benefits of Chemoprevention Outweighed by the Promotion of Diabetes and Insulin Resistance?
Creators: name: Rocourt, Caroline R. B.
name: Cheng, Wen-Hsing
Publisher: name: MDPI
Year: 2013
Subjects: selenium
supranutrition
type 2 diabetes
cancer

description: Selenium was considered a toxin until 1957, when this mineral was shown to be essential in the prevention of necrotic liver damage in rats. The hypothesis of selenium chemoprevention is principally formulated by the observations that cancer incidence is inversely associated with selenium status. However, recent clinical and epidemiological studies demonstrate a role for some selenoproteins in exacerbating or promoting other disease states, specifically type 2 diabetes, although other data support a role of selenium in stimulating insulin sensitivity. Therefore, it is clear that our understanding in the role of selenium in glucose metabolism and chemoprevention is inadequate and incomplete. Research exploring the role of selenium in individual healthcare is of upmost importance and possibly will help explain how selenium is a double-edged sword in the pathologies of chronic diseases.
Linear perturbation analysis of hairy black holes in shift-symmetric Horndeski theories: Odd-parity perturbations
Creators: name: Takahashi, Kazufumi
name: Suyama, Teruaki
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 analyze the mode stability of odd-parity perturbations of black holes with linearly time-dependent scalar hair in shift-symmetric Horndeski theories. We show that a large class of black hole solutions in these theories suffer from ghost or gradient instability, while there are some classes of solutions that are stable under linear odd-parity perturbations in the context of mode analysis.
description: 9 pages; matches published version
Using AquaticHealth.net to Detect Emerging Trends in Aquatic Animal Health
Creators: name: Lyon, Aidan
name: Mooney, Allan
name: Grossel, Geoff
Publisher: name: MDPI
Year: 2013
Subjects: aquaculture
intelligence
disease
biosecurity
aquatic animal health
digital disease detection
social epistemology

description: AquaticHealth.net is an open-source aquatic biosecurity intelligence application. By combining automated data collection and human analysis, AquaticHealth.net provides fast and accurate disease outbreak detection and forecasts, accompanied with nuanced explanations. The system has been online and open to the public since 1 January 2010, it has over 200 registered expert users around the world, and it typically publishes about seven daily reports and two weekly disease alerts. We document the major trends in aquatic animal health that the system has detected over these two years, and conclude with some forecasts for the future.
Hasselmann's Paradigm for Stochastic Climate Modelling based on Stochastic Lie Transport
Creators: name: Crisan, D.
name: Holm, D. D.
name: Korn, P.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: A generic approach to stochastic climate modelling is developed for the example of an idealized Atmosphere-Ocean model that rests upon Hasselmann's paradigm for stochastic climate models. Namely, stochasticity is incorporated into the fast moving atmospheric component of an idealized coupled model by means of stochastic Lie transport, while the slow moving ocean model remains deterministic. More specifically the stochastic model SALT (stochastic advection by Lie transport) is constructed by introducing stochastic transport into the material loop in Kelvin's circulation theorem. The resulting stochastic model preserves circulation, as does the underlying deterministic climate model. A variant of SALT called LA-SALT (Lagrangian-Averaged SALT) is introduced in this paper. In LA-SALT, we replace the drift velocity of the stochastic vector field by its expected value. The remarkable property of LA-SALT is that the evolution of its higher moments are governed by linear deterministic equations. Our modelling approach is substantiated by establishing local existence results, first, for the deterministic climate model that couples compressible atmospheric equations to incompressible ocean equation, and second, for the two stochastic SALT and LA-SALT models.
description: 51 pages, 1 figure
Characterization of Canopy Layering in Forested Ecosystems Using Full Waveform Lidar
Creators: name: Whitehurst, Amanda S.
name: Swatantran, Anu
name: Blair, J. Bryan
name: Hofton, Michelle A.
name: Dubayah, Ralph
Publisher: name: MDPI
Year: 2013
Subjects: lidar
vertical structure
canopy layering
New Hampshire

description: Canopy structure, the vertical distribution of canopy material, is an important element of forest ecosystem dynamics and habitat preference. Although vertical stratification, or “canopy layering,” is a basic characterization of canopy structure for research and forest management, it is difficult to quantify at landscape scales. In this paper we describe canopy structure and develop methodologies to map forest vertical stratification in a mixed temperate forest using full-waveform lidar. Two definitions—one categorical and one continuous—are used to map canopy layering over Hubbard Brook Experimental Forest, New Hampshire with lidar data collected in 2009 by NASA’s Laser Vegetation Imaging Sensor (LVIS). The two resulting canopy layering datasets describe variation of canopy layering throughout the forest and show that layering varies with terrain elevation and canopy height. This information should provide increased understanding of vertical structure variability and aid habitat characterization and other forest management activities.
The Causes of Employee Turnover in Public Banks in Ethiopia, the case of National Bank of Ethiopia
Creators: name: Karote, Kanzile
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2019

description: This research focuses on the causes of employee turnover in the National Bank of Ethiopia. High staff turnover rate may endanger efforts to achieve organizational objectives. In addition, organization loses a talented or critical employee; there is negative impact on efficiency and effectiveness. The study employed qualitative research approaches. The sampling technique used is stratified random sampling method to select the sample size from the population. Questionnaire and interview were used for data collection. The descriptive data was used to quantitatively describe the feature of the variables using frequency table. SPSS software was used due to its ease of use and clarity of output. The main findings indicated that low salary is the primary cause of employee turnover in the National Bank of Ethiopia. Similarly, the results revealed that lack of career advancement, working environment, training and development and job satisfaction are causes of employee turnover. It was recommended that the bank should pay a reasonable and competitive salary to employees, develop career development opportunities, create conducive working environment and training needs should be identified based on employees knowledge, skill and attitude gaps.
Peel-and-Bound: Generating Stronger Relaxed Bounds with Multivalued Decision Diagrams
Creators: name: Rudich, Isaac
name: Cappart, Quentin
name: Rousseau, Louis-Martin
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 90-08

description: Decision diagrams are an increasingly important tool in cutting-edge solvers for discrete optimization. However, the field of decision diagrams is relatively new, and is still incorporating the library of techniques that conventional solvers have had decades to build. We drew inspiration from the warm-start technique used in conventional solvers to address one of the major challenges faced by decision diagram based methods. Decision diagrams become more useful the wider they are allowed to be, but also become more costly to generate, especially with large numbers of variables. We present a method of peeling off a sub-graph of previously constructed diagrams and using it as the initial diagram for subsequent iterations that we call peel-and-bound. We test the method on the sequence ordering problem, and our results indicate that our peel-and-bound scheme generates stronger bounds than a branch-and-bound scheme using the same propagators, and at significantly less computational cost.
description: 20 pages with 11 figures, to be published in CP 2022
Using Satellite Data to Represent Tropical Instability Waves (TIWs)-Induced Wind for Ocean Modeling: A Negative Feedback onto TIW Activity in the Pacific
Creators: name: Zhang, Rong-Hua
name: Li, Zhongxian
name: Min, Jinzhong
Publisher: name: MDPI
Year: 2013
Subjects: remotely sensed data
TIWs
TIW wind feedback and coupling
ocean modeling
tropical Pacific

description: Recent satellite data and modeling studies indicate a pronounced role Tropical Instability Waves (TIW)-induced wind feedback plays in the tropical Pacific climate system. Previously, remotely sensed data were used to derive a diagnostic model for TIW-induced wind stress perturbations (τTIW), which was embedded into an ocean general circulation model (OGCM) to take into account TIW-induced ocean-atmosphere coupling in the tropical Pacific. While the previous paper by Zhang (2013) is concerned with the effect on the mean ocean state, the present paper is devoted to using the embedded system to examine the effects on TIW activity in the ocean, with τTIW being interactively determined from TIW-scale sea surface temperature (SSTTIW) fields generated in the OGCM, written as τTIW = αTIW·F(SSTTIW), where αTIW is a scalar parameter introduced to represent the τTIW forcing intensity. Sensitivity experiments with varying αTIW (representing TIW-scale wind feedback strength) are performed to illustrate a negative feedback induced by TIW-scale air-sea coupling and its relationship with TIW variability in the ocean. Consistent with previous modeling studies, TIW wind feedback tends to have a damping effect on TIWs in the ocean, with a general inverse relationship between the τTIW intensity and TIWs. It is further shown that TIW-scale coupling does not vary linearly with αTIW: the coupling increases linearly with intensifying τTIW forcing at low values of αTIW (in a weak τTIW forcing regime); it becomes saturated at a certain value of αTIW; it decreases when αTIW goes above a threshold value as the τTIW forcing increases further. This work presents a clear demonstration of using satellite data to effectively represent TIW-scale wind feedback and its multi-scale interactions with large-scale ocean processes in the tropical Pacific.
Liminality, in-betweeness and becoming : young people, train stations and the social life of art
Creators: name: Bishop, Tiffaney.
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.
Supplementary document for Coupling light emission of single photon sources into single-mode fibers: mode matching, coupling efficiencies, and thermo-optical effects - 5943736.pdf
Creators: name: Schwab, Julian
name: Weber, Ksenia
name: Drozella, Johannes
name: Jimenez, Carlos
name: Herkommer, Alois
name: Bremer, Lucas
name: Reitzenstein, Stephan
name: Giessen, Harald
Publisher: name: Optica Publishing Group
Year: 2022
Subjects: subject: 111302 Optical Technology
subject: FOS: Clinical medicine

description: Supplemental Document
Improving Science Assessments by Situating Them in a Virtual Environment
Creators: name: Ketelhut, Diane Jass
name: Nelson, Brian
name: Schifter, Catherine
name: Kim, Younsu
Publisher: name: MDPI
Year: 2013
Subjects: assessment
scientific inquiry
immersive virtual environments
middle school

description: Current science assessments typically present a series of isolated fact-based questions, poorly representing the complexity of how real-world science is constructed. The National Research Council asserts that this needs to change to reflect a more authentic model of science practice. We strongly concur and suggest that good science assessments need to consist of several key factors: integration of science content with scientific inquiry, contextualization of questions, efficiency of grading and statistical validity and reliability.Through our Situated Assessment using Virtual Environments for Science Content and inquiry (SAVE Science) research project, we have developed an immersive virtual environment to assess middle school children’s understanding of science content and processes that they have been taught through typical classroom instruction. In the virtual environment, participants complete a problem-based assessment by exploring a game world, interacting with computer-based characters and objects, collecting and analyzing possible clues to the assessment problem. Students can solve the problems situated in the virtual environment in multiple ways; many of these are equally correct while others uncover misconceptions regarding inference-making. In this paper, we discuss stage one in the design and assessment of our project, focusing on our design strategies for integrating content and inquiry assessment and on early implementation results. We conclude that immersive virtual environments do offer the potential for creating effective science assessments based on our framework and that we need to consider engagement as part of the framework.
Detecting multimuon jets from the Higgs exotic decays in the Higgs portal framework
Creators: name: Chang, Jung
name: Cheung, Kingman
name: Hsu, Shih-Chieh
name: Lu, Chih-Ting
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A muon jet ($μ$-jet) is a very special feature that consists of a cluster of collimated muons from the decay of a fast moving light particle of mass about $\mathcal{O}$(1 GeV). We will use this feature to search for very light particles from rare decays of the Higgs boson. For such a small angular separation of muons which might come from a long-lived particle, both ATLAS and CMS could have the displaced-vertexing-reconstruction capability. We use two simple models of the Higgs-portal type to explore the possibilities of event topologies with two $2μ$-jets, one $2μ$-jet $\&$ one $4μ$-jet, and two $4μ$-jets in the final state at LHC-14. We also summarize existing constraints on these models.
description: v3: 38 pages, 16 figures, accepted version by PRD