cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Sharp estimates for the Szegő projection on the distinguished boundary of model worm domains
Creators: name: Monguzzi, Alessandro
name: Peloso, Marco M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Complex Variables (math.CV)
subject: FOS: Mathematics

description: In this paper we study the regularity of the Szegő projection on Lebesgue and Sobolev spaces on the distinguished boundary of the unbounded model worm domain $D_β$. We denote by $d_b(D_β)$ the distinguished boundary of $D_β$ and define the corresponding Hardy space $\mathscr{H}^2(D_β)$. This can be identified with a closed subspace of $L^2(d_b(D_β),dσ)$, that we denote by $\mathscr{H}^2(d_b(D_β))$, where $dσ$ is the naturally induced measure on $d_b(D_β)$. The orthogonal Hilbert space projection $\mathscr{P}: L^2(d_b(D_β),dσ)\to \mathscr{H}^2(d_b(D_β))$ is called the Szegő projection on the distinguished boundary. We prove that $\mathscr{P}$, initially defined on the dense subspace $L^2(d_b( D_β),dσ)\cap L^p(d_b(D_β), dσ)$ extends to a bounded operator $\mathscr{P}: L^p(d_b(D_β), dσ)\to L^p(d_b(D_β), dσ)$ if and only if $\textstyle{\frac{2}{1+ν_β}}π$. Furthermore, we also prove that $\mathscr{P}$ defines a bounded operator $\mathscr{P}: W^{s,2}(d_b(D_β),dσ)\to W^{s,2}(d_b(D_β), dσ)$ if and only if $0\leq s
description: 27 pages
Epistemic Syllogistic: First Steps
Creators: name: Li, Yipu
name: Wang, Yanjing
Publisher: name: arXiv
Year: 2023
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Logic in Computer Science (cs.LO)
subject: Multiagent Systems (cs.MA)
subject: FOS: Computer and information sciences

description: Aristotle's discussions on modal syllogistic have often been viewed as error-prone and have garnered significant attention in the literature due to historical and philosophical interests. However, from a contemporary standpoint, they also introduced natural fragments of first-order modal logic, warranting a comprehensive technical analysis. In this paper, drawing inspiration from the natural logic program, we propose and examine several variants of modal syllogistic within the epistemic context, thereby coining the term Epistemic Syllogistic. Specifically, we concentrate on the de re interpretation of epistemic syllogisms containing non-trivial yet natural expressions such as "all things known to be A are also known to be not B." We explore the epistemic apodeictic syllogistic and its extensions, which accommodate more complex terms. Our main contributions include several axiomatizations of these logics, with completeness proofs that may be of independent interest.
description: In Proceedings TARK 2023, arXiv:2307.04005
Adaptive control for electronically-controlled air powered industrial servodrives
Creators: name: Sai-Cheong., Fok
Publisher: name: Monash University
Year: 2021

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.
Optical cavity for enhanced parametric four-wave mixing in rubidium
Creators: name: Brekke, E.
name: Potier, S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We demonstrate the implementation of a ring cavity to enhance the efficiency of parametric four-wave mixing in rubidium. Using an input coupler with 95% reflectance, a finesse of 19.6$\pm$0.5 is achieved with a rubidium cell inside. This increases the circulating intensity by a factor of 5.6$\pm$0.5, and through two-photon excitation on the $5s_{1/2}\rightarrow5d_{5/2}$ transition with a single excitation laser, up to 1.9$\pm$0.3 mW of power at 420 nm is generated, 50 times what was previously generated with this scheme. The dependence of the output on Rb density and input power has been explored, suggesting the process may be approaching saturation. The blue output of the cavity also shows greatly improved spatial quality, combining to make this a promising source of 420 nm light for future experiments.
An Abstract Look at Awareness Models and Their Dynamics
Creators: name: Proietti, Carlo
name: Velázquez-Quesada, Fernando R.
name: Yuste-Ginel, Antonio
Publisher: name: arXiv
Year: 2023
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences
subject: I.2.4; F.4.1

description: This work builds upon a well-established research tradition on modal logics of awareness. One of its aims is to export tools and techniques to other areas within modal logic. To this end, we illustrate a number of significant bridges with abstract argumentation, justification logics, the epistemic logic of knowing-what and deontic logic, where basic notions and definitional concepts can be expressed in terms of the awareness operator combined with the box modality. Furthermore, these conceptual links point to interesting properties of awareness sets beyond those standardly assumed in awareness logics, i.e. positive and negative introspection. We show that the properties we list are characterised by corresponding canonical formulas, so as to obtain a series of off-the-shelf axiomatisations for them. As a second focus, we investigate the general dynamics of this framework by means of event models. Of specific interest in this context is to know under which conditions, given a model that satisfies some property, the update with an event model keeps it within the intended class. This is known as the closure problem in general dynamic epistemic logics. As a main contribution, we prove a number of closure theorems providing sufficient conditions for the preservation of our properties. Again, these results enable us to axiomatize our dynamic logics by means of reduction axioms.
description: In Proceedings TARK 2023, arXiv:2307.04005
Political and Economic Determinants of Capital Flight: Panel Data Analysis from East African Countries
Creators: name: Mekonnen, Bekele
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2017

description: Capital flight has been a problem among many developing countries. It is more severe among African countries. Given their smaller resource base and limited market, the problem of capital flight justifies a serious attention particularly among East African Economies. Albeit most of these countries are in the ranking list of huge volume of capital flight east Africa has never been considered as a sub- region in the capital related studies. Cognizant of this, this paper intends to contribute to this body of knowledge by filling a noticeable gap. This paper examined the determinant of capital flight from 9 eastern Africa countries for the period 2006 - 2015. The linear regression panel corrected standard errors model was employed and found that absence of political freedom and good institutions to have a positive and significant effect for the prevalence of capital flight. Capital flight is also affected negatively by GDP growth; credit availability and exchange rate. Exchange rate has shown unexpected sign implying the exchange rate can have negative impact on the capital flight through its effect on current account whose value minimize the residual in the formulation of capital flight. Further budget deficit and level of debt have positive relationship with capital flight. The study forwards considerations for the policy makers the need to have easier access for credit facilities for the private sector accelerate economic growth, to devise a mechanism to widen the tax base to finance budget deficit and establish constructive institutions enhancing political freedom and ensuring political and civil liberties of citizens in order to curb current aggravated level of capital flight
The plastic collapse of hollow and foam-filled thin-walled spot-welded tubes in axial compression and in pure bending
Creators: name: Flockhart., Craig John
Publisher: name: Monash University
Year: 2021

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.
Strengthening Consistency Results in Modal Logic
Creators: name: Alexander, Samuel Allen
name: Pedersen, Arthur Paul
Publisher: name: arXiv
Year: 2023
Subjects: subject: Logic (math.LO)
subject: Artificial Intelligence (cs.AI)
subject: Logic in Computer Science (cs.LO)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: F4.1;I.23;I.24

description: A fundamental question asked in modal logic is whether a given theory is consistent. But consistent with what? A typical way to address this question identifies a choice of background knowledge axioms (say, S4, D, etc.) and then shows the assumptions codified by the theory in question to be consistent with those background axioms. But determining the specific choice and division of background axioms is, at least sometimes, little more than tradition. This paper introduces **generic theories** for propositional modal logic to address consistency results in a more robust way. As building blocks for background knowledge, generic theories provide a standard for categorical determinations of consistency. We argue that the results and methods of this paper help to elucidate problems in epistemology and enjoy sufficient scope and power to have purchase on problems bearing on modalities in judgement, inference, and decision making.
description: In Proceedings TARK 2023, arXiv:2307.04005. The authors thank three anonymous reviewers as well as Rineke Verbrugge for valuable comments and suggestions to help improve this manuscript. The authors also extend their gratitude to Alessandro Aldini, Michael Grossberg, Ali Kahn, Rohit Parikh, and Max Stinchcombe, for their generous feedback on prior drafts of this manuscript
An Evolutionary Algorithm to Learn SPARQL Queries for Source-Target-Pairs: Finding Patterns for Human Associations in DBpedia
Creators: name: Hees, Jörn
name: Bauer, Rouven
name: Folz, Joachim
name: Borth, Damian
name: Dengel, Andreas
Publisher: name: arXiv
Year: 2016
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Databases (cs.DB)
subject: Neural and Evolutionary Computing (cs.NE)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: I.2; I.2.4; I.2.6; I.5; I.5.2; I.5.3; G.2.2
subject: 68Txx, 68T05, 68T10, 68T30, 05C85

description: Efficient usage of the knowledge provided by the Linked Data community is often hindered by the need for domain experts to formulate the right SPARQL queries to answer questions. For new questions they have to decide which datasets are suitable and in which terminology and modelling style to phrase the SPARQL query. In this work we present an evolutionary algorithm to help with this challenging task. Given a training list of source-target node-pair examples our algorithm can learn patterns (SPARQL queries) from a SPARQL endpoint. The learned patterns can be visualised to form the basis for further investigation, or they can be used to predict target nodes for new source nodes. Amongst others, we apply our algorithm to a dataset of several hundred human associations (such as "circle - square") to find patterns for them in DBpedia. We show the scalability of the algorithm by running it against a SPARQL endpoint loaded with > 7.9 billion triples. Further, we use the resulting SPARQL queries to mimic human associations with a Mean Average Precision (MAP) of 39.9 % and a Recall@10 of 63.9 %.
description: 15 pages, 2 figures, as of 2016-09-13 6a19d5d7020770dc0711081ce2c1e52f71bf4b86
Lin et al., 2021. A reconciled solution of Meltwater Pulse 1A sources using sea-level fingerprinting. Nature Comms 12: 2015, https://doi.org/10.1038/s41467-021-21990-y
Creators: name: Lin, Yucheng
name: Hibbert, Fiona
Publisher: name: figshare
Year: 2022
Subjects: subject: Paleoclimatology
subject: 40605 Palaeoclimatology
subject: FOS: Earth and related environmental sciences
subject: 40699 Physical Geography and Environmental Geoscience not elsewhere classified
subject: 40606 Quaternary Environments
subject: Solid Earth Sciences

description: ABSTRACT:  The most rapid global sea-level rise event of the last deglaciation, Meltwater Pulse 1A (MWP-1A), occurred ∼14,650 years ago. Considerable uncertainty regarding the sources of meltwater limits understanding of the relationship between MWP-1A and the concurrent fast-changing climate. Here we present a data-driven inversion approach, using a glacio- isostatic adjustment model to invert for the sources of MWP-1A via sea-level constraints from six geographically distributed sites. The results suggest contributions from Antarctica, 1.3 m (0–5.9 m; 95% probability), Scandinavia, 4.6 m (3.2–6.4 m) and North America, 12.0 m (5.6–15.4 m), giving a global mean sea-level rise of 17.9 m (15.7–20.2 m) in 500 years. Only a North American dominant scenario successfully predicts the observed sea-level change across our six sites and an Antarctic dominant scenario is firmly refuted by Scottish isolation basin records. Our sea-level based results therefore reconcile with field-based ice-sheet reconstructions.
Nonlinear reaction-diffusion systems with a non-constant diffusivity: conditional symmetries in no-go case
Creators: name: Cherniha, Roman
name: Davydovych, Vasyl'
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Q-conditional symmetries (nonclassical symmetries) for a general class of two-component reaction-diffusion systems with non-constant diffusivities are studied. The work is a natural continuation of our paper (Cherniha and Davydovych, 2012) in order to extend the results on so-called no-go case. Using the notion of Q-conditional symmetries of the first type, an exhaustive list of reaction-diffusion systems admitting such symmetry is derived. The results obtained are compared with those derived earlier. The symmetries for reducing reaction-diffusion systems to two-dimensional dynamical systems (ODE systems) and finding exact solutions are applied. As result, multiparameter families of exact solutions in the explicit form for nonlinear reaction-diffusion systems with an arbitrary power-law diffusivity are constructed and their properties for possible applicability are established.
description: arXiv admin note: text overlap with arXiv:1609.09607
Chloride-selective cholinergic receptor/channels in snail neurones
Creators: name: Finkel., Alan S.
Publisher: name: Monash University
Year: 2021

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.
Spin texture on top of vortex avalanches in Nb/Al_2O_3/Co thin film heterostructures
Creators: name: Lopes, R. F.
name: Carmo, D.
name: Colauto, F.
name: Ortiz, W. A.
name: de Andrade, A. M. H.
name: Johansen, T. H.
name: Baggio-Saitovitch, E.
name: Pureur, P.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We report on magneto-optical imaging, magnetization, Hall effect and magneto-resistance experiments in Nb/Al_2O_3/Co thin film heterostructures. The magnetic field is applied perpendicularly to the plane of the film and gives rise to abrupt flux penetration of dendritic form. A magnetization texture is imprinted in the Co layer in perfect coincidence with these ramifications. The spin domains that mimic the vortex dendrites are stable upon the field removal. Moreover, the imprinted spin structure remains visible up to room temperature. Complementary magnetization, Hall effect and magneto-resistance experiments were performed in a similar sample where electrical contacts were placed on the Co layer. In the region of the field - temperature diagram where flux instabilities are known to occur in Nb films, irregular jumps are observed in the magnetic hysteresis and large amplitude noise is detected in the magneto-resistance and Hall resistivity data when measured as a function of the field.
description: 13 pages, 8 figures
Resilient Information Aggregation
Creators: name: Arieli, Itai
name: Geffner, Ivan
name: Tennenholtz, Moshe
Publisher: name: arXiv
Year: 2023
Subjects: subject: Theoretical Economics (econ.TH)
subject: Computer Science and Game Theory (cs.GT)
subject: Multiagent Systems (cs.MA)
subject: FOS: Economics and business
subject: FOS: Computer and information sciences

description: In an information aggregation game, a set of senders interact with a receiver through a mediator. Each sender observes the state of the world and communicates a message to the mediator, who recommends an action to the receiver based on the messages received. The payoff of the senders and of the receiver depend on both the state of the world and the action selected by the receiver. This setting extends the celebrated cheap talk model in two aspects: there are many senders (as opposed to just one) and there is a mediator. From a practical perspective, this setting captures platforms in which strategic experts advice is aggregated in service of action recommendations to the user. We aim at finding an optimal mediator/platform that maximizes the users' welfare given highly resilient incentive compatibility requirements on the equilibrium selected: we want the platform to be incentive compatible for the receiver/user when selecting the recommended action, and we want it to be resilient against group deviations by the senders/experts. We provide highly positive answers to this challenge, manifested through efficient algorithms.
description: In Proceedings TARK 2023, arXiv:2307.04005
Casimir energies of self-similar plate configurations
Creators: name: Shajesh, K. V.
name: Brevik, Iver
name: Cavero-Peláez, Inés
name: Parashar, Prachi
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We construct various self-similar configurations using parallel $δ$-function plates and show that it is possible to evaluate the Casimir interaction energy of these configurations using the idea of self-similarity alone. We restrict our analysis to interactions mediated by a scalar field, but the extension to electromagnetic field is immediate. Our work unveils an easy and powerful method that can be easily employed to calculate the Casimir energies of a class of self-similar configurations. As a highlight, in an example, we determine the Casimir interaction energy of a stack of parallel plates constructed by positioning $δ$-function plates at the points constituting the Cantor set, a prototype of a fractal. This, to our knowledge, is the first time that the Casimir energy of a fractal configuration has been reported. Remarkably, the Casimir energy of some of the configurations we consider turn out to be positive, and a few even have zero Casimir energy. For the case of positive Casimir energy that is monotonically decreasing as the stacking parameter increases the interpretation is that the pressure of vacuum tends to inflate the infinite stack of plates. We further support our results, derived using the idea of self-similarity alone, by rederiving them using the Green's function formalism. These expositions gives us insight into the connections between the regularization methods used in quantum field theories and regularized sums of divergent series in number theory.
description: 13 pages, 5 figures, Minor changes to match the journal article
Assessment Of Laboratory Commodities Supply Chain Performance In Amanuel Specialized Mental Hospital, Addis Ababa, Ethiopia
Creators: name: Mekuria, Banchirega
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2017

description: A Supply chain operation reference is a model that provides "a unique framework that links business process, metrics, best practices and technology into a unified structure to support communication among supply chain partners and to improve the effectiveness of supply chain management and related supply chain improvement activities. The aim of this study is to assess the performance of laboratory commodities supply chain of Amanuel Mental Specialized Hospital. The study focused on five supply chain performance attributes which are supply chain reliability, supply chain responsiveness, supply chain agility, supply chain operational cost and inventory management Practice. A case study design using SCOR model was used to conduct the study on laboratory supply chain performance in Amanuel Specialized mental hospital. The research used both qualitative and quantitative approach. The quantitative data was analyzed using excel for descriptive statistics and the qualitative data was used to further explain the findings of the quantitative data. All one year data of report and request form, intra facility report and request form model, model 19 and 22, inventory reports, stock out report form, bin cards and stock cards were used. Census is sample selection technique to study the quantitative variable. Data for each metrics were obtained from the process components that are used to drive the calculation according to the SCOR guide. Structured data collection format and interview guide were used to collect data. Decomposition analysis method was used to measure the performance gap and identify root cause. The study found out that perfect order fulfillment of laboratory commodities were 25%. The order fulfillment cycle time was 54.45. The asset turnover rate was 0.72. Some of the root causes mainly contributed for low performance was unavailability laboratory commodities with required kind and quantity at distributers and delay to authorize payment. Therefore strengthening collaborative planning, forecasting and replenishment between the hospital and suppliers, establishing long term supplier agreement between the private suppliers and Improving the authorization of payment timely are some of the recommended practices.
Spectral nuclear properties of NLS1 galaxies
Creators: name: Schmidt, Eduardo O.
name: Ferreiro, Diego
name: Vega, Luis
name: Oio, Gabriel A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: It is not yet well known whether narrow line Seyfert 1 (NLS1) galaxies follow the $M_{BH} - σ_{\star}$ relation found for normal galaxies. Emission lines, such as [SII] or [OIII]$λ$5007, have been used as a surrogate of the stellar velocity dispersion and various results have been obtained. On the other hand, some active galactic nuclei (AGNs) have shown Balmer emission with an additional intermediate component (IC) besides the well-known narrow and broad lines. In order to re-examine the location of NLS1 in the $M_{BH} - σ_{\star}$ relation, we test some emission lines, such as the narrow component (NC) of H$α$ and the forbidden [NII]$λλ$6548,6584 and [SII]$λλ$6716,6731 lines, as replacements for $σ_{\star}$. On the other hand, we study the properties of the IC of H$α$ found in 14 galaxies of the sample to find a link between this component, the central engine, and the remaining lines. We also compare the emission among the broad component (BC) of H$α$ and those emitted at the narrow line region (NLR). We have obtained and studied medium-resolution spectra (170 km s$^{-1}$ FWHM at H$α$) of 36 NLS1 galaxies in the optical range $\sim$5800 - 6800Å. We found that, in general, most of the galaxies lie below the $M_{BH} - σ_{\star}$ relation when the NC of H$α$, [SII], and [NII] lines are used as a surrogate of $σ_{\star}$. Besides this, we found that 13 galaxies show an IC, most of which are in the velocity range $\sim$ 700 $-$ 1500 km s$^{- 1}$. This is same range as in AGN types and is well correlated with the FWHM of BC and, therefore, with the BH mass. On the other hand, we found that there is a correlation between the luminosity of the BC of H$α$ and NC, IC, [NII]$λ$6584, and [SII] lines.
description: Accepted to be published in the A&A. 13 pages, 9 figures, 2 tables
Comparing Social Network Dynamic Operators
Creators: name: Baccini, Edoardo
name: Christoff, Zoé
Publisher: name: arXiv
Year: 2023
Subjects: subject: Multiagent Systems (cs.MA)
subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences

description: Numerous logics have been developed to reason either about threshold-induced opinion diffusion in a network, or about similarity-driven network structure evolution, or about both. In this paper, we first introduce a logic containing different dynamic operators to capture changes that are 'asynchronous' (opinion change only, network-link change only) and changes that are 'synchronous' (both at the same time). Second, we show that synchronous operators cannot, in general, be replaced by asynchronous operators and vice versa. Third, we characterise the class of models on which the synchronous operator can be reduced to sequences of asynchronous operators.
description: In Proceedings TARK 2023, arXiv:2307.04005
Praktikantenschein (der Medizinischen Klinik) (1934-03-01)
Creators: name: Uniwersytet Wrocławski
Publisher: name: University of Victoria Libraries
Year: 2020
Subjects: subject: Preuss, Siegfried
subject: Education
valueUri: http://id.worldcat.org/fast/902499
subject: Universities and colleges
valueUri: http://id.worldcat.org/fast/1161597
subject: Medical colleges
valueUri: http://id.worldcat.org/fast/1013952

description: Internship certificate for Siegfried Preuss' successful completion of an internship at a medical clinic that took place in the winter "half year" from 6 November 1933 to 1 March 1934. Signed by the director of the medical clinic. Issued by the University of Breslau.
Structural evolution in $A\approx 100$ nuclei within the mapped interacting boson model based on the Gogny energy density functional
Creators: name: Nomura, K.
name: Rodríguez-Guzmán, R.
name: Robledo, L. M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The structure of even-even neutron-rich Ru, Mo, Zr and Sr nuclei in the $A\approx 100$ mass region is studied within the interacting boson model (IBM) with microscopic input from the self-consistent mean-field approximation based on the Gogny-D1M energy density functional. The deformation energy surface in the quadrupole deformation space $(β,γ)$, computed within the constrained Hartree-Fock-Bogoliubov framework, is mapped onto the expectation value of the appropriately chosen IBM Hamiltonian with configuration mixing in the boson condensate state. The mapped IBM Hamiltonian is used to study the spectroscopic properties of $^{98-114}$Ru, $^{96-112}$Mo, $^{94-110}$Zr and $^{92-108}$Sr. Several cases of $γ$-soft behavior are predicted in Ru and Mo nuclei while a pronounced coexistence between strongly-prolate and weakly-oblate deformed shapes is found for Zr and Sr nuclei. The method describes well the evolution of experimental yrast and non-yrast states as well as selected $B$(E2) transition probabilities.
description: 20 pages, 23 figures, 1 table; To be published in Phys. Rev. C
Does Real Exchange Rate Matter for Ethiopia"s Exports? A Gravity Model Analysis
Creators: name: Bekele, Kebede
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2011

description: Real exchange rate is usually used as a measure of export competitiveness of a country. Despite mixed results in empirical works, its depreciation (appreciation) is supposed to stimulate (depress) exports from a particular country. This study mainly focuses on examining whether Ethiopia's exports are determined by movements in real exchange rate. To examine this issue, the aggregate export and the exports of two main subsectors; namely, Coffee and Oilseeds are taken into consideration using bilateral exports to seventeen major trading partners over the period 2000-2009. Accordingly, a dynamic panel data gravity model that takes into account the persistent nature of trade is estimated using the system GMM estimator. Following recent approach in empirical studies, both the current and one year lagged real exchanges rates are included, where the latter is intended to account for the sluggish adjustment of trade to changes in relative prices. The results of the study show that both lagged and current real exchange rates are not in a position to exert significant effect on the bilateral exports of the country, in all the three export categories under consideration. The implication is that complementary measures are required to gain competitiveness in international market. Diversifying exports from traditional primary commodities to nontraditional price elastic export items, expanding exports destinations and giving due attention to the quality of exports are reasonable options
Epistemic Logics of Structured Intensional Groups
Creators: name: Bílková, Marta
name: Sedlár, Igor
Publisher: name: arXiv
Year: 2023
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Multiagent Systems (cs.MA)
subject: FOS: Computer and information sciences

description: Epistemic logics of intensional groups lift the assumption that membership in a group of agents is common knowledge. Instead of being represented directly as a set of agents, intensional groups are represented by a property that may change its extension from world to world. Several authors have considered versions of the intensional group framework where group-specifying properties are articulated using structured terms of a language, such as the language of Boolean algebras or of description logic. In this paper we formulate a general semantic framework for epistemic logics of structured intensional groups, develop the basic theory leading to completeness-via-canonicity results, and show that several frameworks presented in the literature correspond to special cases of the general framework.
description: In Proceedings TARK 2023, arXiv:2307.04005
Comparing the Update Expressivity of Communication Patterns and Action Models
Creators: name: Castañeda, Armando
name: van Ditmarsch, Hans
name: Rosenblueth, David A.
name: Velázquez, Diego A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: Any kind of dynamics in dynamic epistemic logic can be represented as an action model. Right? Wrong! In this contribution we prove that the update expressivity of communication patterns is incomparable to that of action models. Action models, as update mechanisms, were proposed by Baltag, Moss, and Solecki in 1998 and have remained the nearly universally accepted update mechanism in dynamic epistemic logics since then. Alternatives, such as arrow updates that were proposed by Kooi and Renne in 2011, have update equivalent action models. More recently, the picture is shifting. Communication patterns are update mechanisms originally proposed in some form or other by Agotnes and Wang in 2017 (as resolving distributed knowledge), by Baltag and Smets in 2020 (as reading events), and by Velazquez, Castaneda, and Rosenblueth in 2021 (as communication patterns). All these logics have the same expressivity as the base logic of distributed knowledge. However, their update expressivity, the relation between pointed epistemic models induced by such an update, was conjectured to be different from that of action model logic. Indeed, we show that action model logic and communication pattern logic are incomparable in update expressivity. We also show that, given a history-based semantics and when restricted to (static) interpreted systems, action model logic is (strictly) more update expressive than communication pattern logic. Our results are relevant for distributed computing wherein oblivious models involve arbitrary iteration of communication patterns.
description: In Proceedings TARK 2023, arXiv:2307.04005
On Imperfect Recall in Multi-Agent Influence Diagrams
Creators: name: Fox, James
name: MacDermott, Matt
name: Hammond, Lewis
name: Harrenstein, Paul
name: Abate, Alessandro
name: Wooldridge, Michael
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Science and Game Theory (cs.GT)
subject: Artificial Intelligence (cs.AI)
subject: Multiagent Systems (cs.MA)
subject: FOS: Computer and information sciences

description: Multi-agent influence diagrams (MAIDs) are a popular game-theoretic model based on Bayesian networks. In some settings, MAIDs offer significant advantages over extensive-form game representations. Previous work on MAIDs has assumed that agents employ behavioural policies, which set independent conditional probability distributions over actions for each of their decisions. In settings with imperfect recall, however, a Nash equilibrium in behavioural policies may not exist. We overcome this by showing how to solve MAIDs with forgetful and absent-minded agents using mixed policies and two types of correlated equilibrium. We also analyse the computational complexity of key decision problems in MAIDs, and explore tractable cases. Finally, we describe applications of MAIDs to Markov games and team situations, where imperfect recall is often unavoidable.
description: In Proceedings TARK 2023, arXiv:2307.04005
Praktikantenschein (dem pathologisch-anatomischen Sektionskursus)
Creators: name: Uniwersytet Wrocławski
Publisher: name: University of Victoria Libraries
Year: 2020
Subjects: subject: Education
valueUri: http://id.worldcat.org/fast/902499
subject: Preuss, Siegfried
subject: Medical colleges
valueUri: http://id.worldcat.org/fast/1013952
subject: Universities and colleges
valueUri: http://id.worldcat.org/fast/1161597

description: Internship certificate for Siegfried Preuss' successful completion of an internship in pathological-anatomical "section courses" that took place in the winter "half year" from 4 November 1934 to 15 February 1935. Signed by the director of the Pathological Institute of the University of Breslau (Henke). Issued by the Pathological Institute of the University of Breslau.
Satisfiability of Arbitrary Public Announcement Logic with Common Knowledge is $Σ^1_1$-hard
Creators: name: Galimullin, Rustam
name: Kuijer, Louwe B.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: Arbitrary Public Announcement Logic with Common Knowledge (APALC) is an extension of Public Announcement Logic with common knowledge modality and quantifiers over announcements. We show that the satisfiability problem of APALC on S5-models, as well as that of two other related logics with quantification and common knowledge, is $Σ^1_1$-hard. This implies that neither the validities nor the satisfiable formulas of APALC are recursively enumerable. Which, in turn, implies that APALC is not finitely axiomatisable.
description: In Proceedings TARK 2023, arXiv:2307.04005
Maximizing Social Welfare in Score-Based Social Distance Games
Creators: name: Ganian, Robert
name: Hamm, Thekla
name: Knop, Dušan
name: Roy, Sanjukta
name: Schierreich, Šimon
name: Suchý, Ondřej
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Science and Game Theory (cs.GT)
subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Computer and information sciences

description: Social distance games have been extensively studied as a coalition formation model where the utilities of agents in each coalition were captured using a utility function u that took into account distances in a given social network. In this paper, we consider a non-normalized score-based definition of social distance games where the utility function u_v depends on a generic scoring vector v, which may be customized to match the specifics of each individual application scenario. As our main technical contribution, we establish the tractability of computing a welfare-maximizing partitioning of the agents into coalitions on tree-like networks, for every score-based function u_v. We provide more efficient algorithms when dealing with specific choices of u_v or simpler networks, and also extend all of these results to computing coalitions that are Nash stable or individually rational. We view these results as a further strong indication of the usefulness of the proposed score-based utility function: even on very simple networks, the problem of computing a welfare-maximizing partitioning into coalitions remains open for the originally considered canonical function u.
description: In Proceedings TARK 2023, arXiv:2307.04005
Strain in epitaxial MnSi films on Si(111) in the thick film limit studied by polarization-dependent extended x-ray absorption fine structure
Creators: name: Figueroa, A. I.
name: Zhang, S. L.
name: Baker, A. A.
name: Chalasani, R.
name: Kohn, A.
name: Speller, S. C.
name: Gianolio, D.
name: Pfleiderer, C.
name: van der Laan, G.
name: Hesjedal, T.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report a study of the strain state of epitaxial MnSi films on Si(111) substrates in the thick film limit (100-500~Å) as a function of film thickness using polarization-dependent extended x-ray absorption fine structure (EXAFS). All films investigated are phase-pure and of high quality with a sharp interface between MnSi and Si. The investigated MnSi films are in a thickness regime where the magnetic transition temperature $T_\mathrm{c}$ assumes a thickness-independent enhanced value of $\geq$43~K as compared with that of bulk MnSi, where $T_\mathrm{c} \approx 29~{\rm K}$. A detailed refinement of the EXAFS data reveals that the Mn positions are unchanged, whereas the Si positions vary along the out-of-plane [111]-direction, alternating in orientation from unit cell to unit cell. Thus, for thick MnSi films, the unit cell volume is essentially that of bulk MnSi --- except in the vicinity of the interface with the Si substrate (thin film limit). In view of the enhanced magnetic transition temperature we conclude that the mere presence of the interface, and its specific characteristics, strongly affects the magnetic properties of the entire MnSi film, even far from the interface. Our analysis provides invaluable information about the local strain at the MnSi/Si(111) interface. The presented methodology of polarization dependent EXAFS can also be employed to investigate the local structure of other interesting interfaces.
description: 11 pages, 10 figures
System of Spheres-based Two Level Credibility-limited Revisions
Creators: name: Garapa, Marco
name: Ferme, Eduardo
name: Reis, Maurício D. L.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences
subject: I.2.3 Deduction and Theorem Proving (F.4.1)

description: Two level credibility-limited revision is a non-prioritized revision operation. When revising by a two level credibility-limited revision, two levels of credibility and one level of incredibility are considered. When revising by a sentence at the highest level of credibility, the operator behaves as a standard revision, if the sentence is at the second level of credibility, then the outcome of the revision process coincides with a standard contraction by the negation of that sentence. If the sentence is not credible, then the original belief set remains unchanged. In this paper, we propose a construction for two level credibility-limited revision operators based on Grove's systems of spheres and present an axiomatic characterization for these operators.
description: In Proceedings TARK 2023, arXiv:2307.04005
A "Game of Like" : Online Social Network Sharing As Strategic Interaction
Creators: name: Genot, Emmanuel J.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Social and Information Networks (cs.SI)
subject: Computer Science and Game Theory (cs.GT)
subject: FOS: Computer and information sciences

description: We argue that behavioral science models of online content-sharing overlook the role of strategic interactions between users. Borrowing from accuracy-nudges studies decision-theoretic models, we propose a basic game model and explore special cases with idealized parameter settings to identify refinements necessary to capture real-world online social network behavior. Anticipating those refinements, we sketch a strategic analysis of content amplification and draw a connection between Keynes's beauty contest analogy and recent social-epistemological work on echo chambers. We conclude on the model's prospects from analytical and empirical perspectives.
description: In Proceedings TARK 2023, arXiv:2307.04005
Crossover from one- to three-dimensional behavior in the S = 1/2 Heisenberg antiferromagnet Cu(N2H5)2(SO4)2
Creators: name: Paduan-Filho, A.
name: Vieira, A. P.
name: Ramon, J. G. A.
name: Freitas, R. S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: From experimental and theoretical analyses of magnetic and specific-heat properties, we present the complete magnetic phase diagram of the quasi-one-dimensional antiferromagnet Cu(N$_2$H$_5$)$_2$(SO$_4$)$_2$. On cooling and at zero magnetic field this compound enters a one-dimensional regime with short-range magnetic correlations, marked by a broad maximum in the specific heat and magnetic susceptibility at $T_\mathrm{max}\sim 2\,\mathrm{K}$, followed by an ordered antiferromagnetic phase below $T_\mathrm{N}\sim 1\,\mathrm{K}$ induced by small interchain couplings. The intermediate-temperate one-dimensional regime can be modeled using exact quantum-transfer-matrix calculations, which perfectly describe the nonmonotonic behavior of T_max as a function of the magnetic field, giving $J = 4.25\,\mathrm{K}$ for the intrachain exchange parameter. The analysis of magnetic specific-heat and susceptibility data at low temperature indicates that the interchain exchange couplings are an order of magnitude smaller than the coupling inside the chains.
description: To appear in Journal of Physics: Condensed Matter
Praktikantenschein (der Dermatologischen Klinik)
Creators: name: Uniwersytet Wrocławski
Publisher: name: University of Victoria Libraries
Year: 2020
Subjects: subject: Medical colleges
valueUri: http://id.worldcat.org/fast/1013952
subject: Preuss, Siegfried
subject: Education
valueUri: http://id.worldcat.org/fast/902499
subject: Universities and colleges
valueUri: http://id.worldcat.org/fast/1161597

description: Internship certificate for Siegfried Preuss' successful completion of an internship at a dermatology clinic in Breslau that took place in winter "half year" from 5 November 1934 to 15 February 1935. Signed by the director of the dermatology clinic in Breslau. Issued by the University of Breslau.
Nighttime and Daytime Blurred: Hyperreality and Kitsch in Las Vegas
Creators: Irazabal Zurita, Clara E.
Publisher: name: Columbia University
Year: 2002
Subjects: subject: Architecture
subject: FOS: Civil engineering
subject: City planning

description: This study investigates the production of hyperreality and kitsch in the last generation of tourist/gambling developments in Las Vegas. In these environments, the distinctions between nighttime and daytime are purposely blurred or made insignificant through their manipulation for the creation of spectacle and the production of a sense of alienation from time and reality. This suspension of real time and space is aimed at both facilitating the deceiving perception of false, constructed natures, and producing ideal sites for pleasure and consumption. I engage this exploration through two main analytical concepts: hyperreality and kitsch. Building upon this theoretical framework, I propose the term hyperkitsch to denote the phenomenon in Las Vegas, and I claim that people's fascination with hyperkitsch iconography that relates to the urban world results from their alienation from their real cities. Thus, in Las Vegas Strip, there are simulated urban landscapes upon where visitors enact fantasy lives and ease the emptiness and estrangement derived from conflicted urban identities and poor citizenship. The study is a contribution for understanding the current social crisis of urban identity formationfor both the human subject and the public sphereamid the accelerating metamorphos of our contemporary culture of spectacle, hedonism and consumerism.
An Acceptance Semantics for Stable Modal Knowledge
Creators: name: Hawke, Peter
Publisher: name: arXiv
Year: 2023
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: We observe some puzzling linguistic data concerning ordinary knowledge ascriptions that embed an epistemic (im)possibility claim. We conclude that it is untenable to jointly endorse both classical logic and a pair of intuitively attractive theses: the thesis that knowledge ascriptions are always veridical and a `negative transparency' thesis that reduces knowledge of a simple negated `might' claim to an epistemic claim without modal content. We motivate a strategy for answering the trade-off: preserve veridicality and (generalized) negative transparency, while abandoning the general validity of contraposition. We survey and criticize various approaches for incorporating veridicality into domain semantics, a paradigmatic `information-sensitive' framework for capturing negative transparency and, more generally, the non-classical behavior of sentences with epistemic modals. We then present a novel information-sensitive semantics that successfully executes our favored strategy: stable acceptance semantics.
description: In Proceedings TARK 2023, arXiv:2307.04005
Spatial and temporal partitioning of video sequences for fractal coding
Creators: name: Ferguson., Tim
Publisher: name: Monash University
Year: 2021

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.
Dynamics of Soliton Cascades in Fiber Amplifiers
Creators: name: Arteaga-Sierra, F. R.
name: Antikainen, A.
name: Agrawal, Govind P.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We study numerically the formation of cascading solitons when femtosecond optical pulses are launched into a fiber amplifier with less energy than required to form a soliton of equal duration. As the pulse is amplified, cascaded fundamental solitons are created at different distances, without soliton fission, as each fundamental soliton moves outside the gain bandwidth through the Raman-induced spectral shifts. As a result, each input pulse creates multiple, temporally separated, ultrashort pulses of different wavelengths at the amplifier output. The number of pulses depends not only on the total gain of the amplifier but also on the width of input pulses.
description: This paper was published in Optical Society of America and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following url on the OSA website: \url{http://www.osa.org/en-us/home/}. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law