cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
KiDS-450: Cosmological parameter constraints from tomographic weak gravitational lensing
Creators: name: Hildebrandt, H.
name: Viola, M.
name: Heymans, C.
name: Joudaki, S.
name: Kuijken, K.
name: Blake, C.
name: Erben, T.
name: Joachimi, B.
name: Klaes, D.
name: Miller, L.
name: Morrison, C. B.
name: Nakajima, R.
name: Kleijn, G. Verdoes
name: Amon, A.
name: Choi, A.
name: Covone, G.
name: de Jong, J. T. A.
name: Dvornik, A.
name: Conti, I. Fenech
name: Grado, A.
name: Harnois-Déraps, J.
name: Herbonnet, R.
name: Hoekstra, H.
name: Köhlinger, F.
name: McFarland, J.
name: Mead, A.
name: Merten, J.
name: Napolitano, N.
name: Peacock, J. A.
name: Radovich, M.
name: Schneider, P.
name: Simon, P.
name: Valentijn, E. A.
name: Busch, J. L. van den
name: van Uitert, E.
name: Van Waerbeke, L.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present cosmological parameter constraints from a tomographic weak gravitational lensing analysis of ~450deg$^2$ of imaging data from the Kilo Degree Survey (KiDS). For a flat $Λ$CDM cosmology with a prior on $H_0$ that encompasses the most recent direct measurements, we find $S_8\equivσ_8\sqrt{Ω_{\rm m}/0.3}=0.745\pm0.039$. This result is in good agreement with other low redshift probes of large scale structure, including recent cosmic shear results, along with pre-Planck cosmic microwave background constraints. A $2.3$-$σ$ tension in $S_8$ and `substantial discordance' in the full parameter space is found with respect to the Planck 2015 results. We use shear measurements for nearly 15 million galaxies, determined with a new improved `self-calibrating' version of $lens$fit validated using an extensive suite of image simulations. Four-band $ugri$ photometric redshifts are calibrated directly with deep spectroscopic surveys. The redshift calibration is confirmed using two independent techniques based on angular cross-correlations and the properties of the photometric redshift probability distributions. Our covariance matrix is determined using an analytical approach, verified numerically with large mock galaxy catalogues. We account for uncertainties in the modelling of intrinsic galaxy alignments and the impact of baryon feedback on the shape of the non-linear matter power spectrum, in addition to the small residual uncertainties in the shear and redshift calibration. The cosmology analysis was performed blind. Our high-level data products, including shear correlation functions, covariance matrices, redshift distributions, and Monte Carlo Markov Chains are available at http://kids.strw.leidenuniv.nl.
description: 49 pages, 34 figures, 9 tables, accepted for publication in MNRAS; data products available at http://kids.strw.leidenuniv.nl/
Factors Determining Deposit Mobilization Performance: In the Case of Private Commercial Banks in Ethiopia
Creators: name: Ferede, Andinet
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2016

description: The aim of this study is to examine factors influencing deposit mobilization in private commercial banks in Ethiopia. In doing so, the study adopted quantitative methods research approach using secondary data. The study had found variables that can affect the total deposits of the banks. Seven variables are regressed with the dependent variable i.e. total deposit. The explanatory variables are number of bank branches, deposit interest rate, liquid asset to deposit ratio, lagged value of bank deposits, net interest margin, inflation rate and economic growth (GDP). The data for these variables were collected from the respective private commercial banks' financial statements, national bank of Ethiopia, central statistical authority and MOFEC of the sample year 2005 up to 2015. Different diagnostic test were performed to know whether the model is valid or not. All the tests were valid and eventually regression analysis was performed using Eview statistical package. The result from regression analysis showed that number of bank branches, deposit interest rate, net interest margin and GDP were significantly and positively correlated with the explained variable. Lagged value of bank deposit was significantly and negatively correlated with total deposit. However, liquid asset to deposit ratio and inflation rate were insignificantly negatively correlated with bank deposit. Finally the study had recommended what should be done to mobilize more deposits.
Bubble nucleation and gravitational wave from holography
Creators: name: Chen, Yidian
name: Li, Danning
name: Huang, Mei
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate the bounce solution in the holographic QCD and electroweak models with first-order phase transition. The strength parameter $α$, inverse duration time $β/H$, and bubble wall velocity $v_w$ in the gravitational wave power spectra are calculated by holographic bounce solution. In contrast to the results of field theory, we find the parameter $α$ is about $\mathcal{O}(1)$ and $β/H$ is about $10^4$, which imply that the phase transition is fast and strong. The critical, nucleation and percolation temperatures of the phase transition are close to each other in the holographic model. In addition, the velocity $v_w$ is found to be less than the sound speed of the plasma $c_{s}=1/\sqrt{3}$, which corresponds to the deflagration scenario. For QCD phase transition, the gravitational wave power spectrum can reach $10^{-13}-10^{-14}$ around the peak frequency of 0.01 Hz, which can be detected by BBO and Ultimate-DECIGO. For electroweak phase transition, the gravitational wave power spectrum can reach $10^{-12}-10^{-16}$ around the peak frequency $1-10$ Hz. Moreover, the primordial black hole is not favorable for formation due to the large parameter $β/H$ and small velocity $v_w$.
The mixing time of the switch Markov chains: a unified approach
Creators: name: Erdős, Péter L.
name: Greenhill, Catherine
name: Mezei, Tamás Róbert
name: Miklós, István
name: Soltész, Dániel
name: Soukup, Lajos
Publisher: name: arXiv
Year: 2019
Subjects: subject: Combinatorics (math.CO)
subject: Discrete Mathematics (cs.DM)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 05C30 60J10 68R10

description: Since 1997 a considerable effort has been spent to study the mixing time of switch Markov chains on the realizations of graphic degree sequences of simple graphs. Several results were proved on rapidly mixing Markov chains on unconstrained, bipartite, and directed sequences, using different mechanisms. The aim of this paper is to unify these approaches. We will illustrate the strength of the unified method by showing that on any $P$-stable family of unconstrained/bipartite/directed degree sequences the switch Markov chain is rapidly mixing. This is a common generalization of every known result that shows the rapid mixing nature of the switch Markov chain on a region of degree sequences. Two applications of this general result will be presented. One is an almost uniform sampler for power-law degree sequences with exponent $γ>1+\sqrt{3}$. The other one shows that the switch Markov chain on the degree sequence of an Erdős-Rényi random graph $G(n,p)$ is asymptotically almost surely rapidly mixing if $p$ is bounded away from 0 and 1 by at least $\frac{5\log n}{n-1}$.
description: final review
Abelian color cycles: a new approach to strong coupling expansion and dual representations for non-abelian lattice gauge theory
Creators: name: Gattringer, Christof
name: Marchis, Carlotta
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We propose a new approach to strong coupling series and dual representations for non-abelian lattice gauge theories using the SU(2) case as an example. The Wilson gauge action is written as a sum over "abelian color cycles" (ACC) which correspond to loops in color space around plaquettes. The ACCs are complex numbers which can be commuted freely such that the strong coupling series and the dual representation can be obtained as in the abelian case. Using a suitable representation of the SU(2) gauge variables we integrate out all original gauge links and identify the constraints for the dual variables in the SU(2) case. We show that the construction can be generalized to the case of SU(2) gauge fields with staggered fermions. The result is a strong coupling series where all gauge integrals are known in closed form and we discuss its applicability for possible dual simulations. The abelian color cycle concept can be generalized to other non-abelian gauge groups such as SU(3).
description: Final version to appear in Nucl. Phys. B
The Relationship between Consumers' Attitude towards Packaging Attributes and Perceived Food Quality, Value and Brand Preference (The Case of Fruit Juice Products)
Creators: name: Mazengia, Yonatan
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2014

description: Due to increasing self-service and changing consumers' lifestyle the interest in packaging as a tool of sales promotion and stimulator of impulsive buying behavior is growing increasingly. Although the increase in point-of-purchase decisions heightens the communication potential of food product packaging, empirical research on understanding whether packaging attributes create consumers' subsequent product and brand evaluations and perceptions is scant. In addition, literature analysis on question under investigation has shown that there is no agreement on classification of packaging elements. This study seeks to empirically reveal important elements of package and to examine whether attitudes towards food product packaging attributes create value perception and brand preferences through perceived product quality. A group-administered questionnaire developed from the literature was conducted, and 300 undergraduate students participated in the study. The empirical results show that graphics, color, shape, size and material are important visual elements and product information, producer, country-of-origin and brand are important verbal elements. Moreover, the empirical results show that attitude toward packaging attributes has a direct and positive relationship with consumers' perceived food product quality and brand preference, but has indirect positive relationship with food product value. Perceived food product quality also indirectly and positively related with brand preferences through product value. Based on the study findings, food firms should emphasize both visual and verbal packaging attributes to form consumers' positive perceptions and brand preference. Keywords: Product packaging attributes, Perceived quality, Perceived value, Brand preference
Boltzmann Distributions on a Quantum Computer via Active Cooling
Creators: name: Ball, Carter
name: Cohen, Thomas D.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Quantum computing raises the possibility of solving a variety of problems in physics that are presently intractable. A number of such problems involves the physics of systems in or near thermal equilibrium. There are two main ways to compute thermal expectation values on a quantum computer: construct a thermal state that reproduces thermal expectation values, or sample various energy eigenstates from a Boltzmann distribution of a given temperature. In this paper we address the second approach and propose an algorithm that uses active cooling to produce the distribution. While this algorithm is quite general and applicable to a wide variety of systems, it was developed with the specific intention of simulating thermal configurations of non-Abelian gauge theories such as QCD, which would allow the study of quark-gluon plasma created in heavy-ion collisions.
Contemporary abstraction : a studio investigation into process, pattern and colour
Creators: name: White, Anna.
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.
Forecasting under Long Memory and Nonstationarity
Creators: name: Hassler, Uwe
name: Pohle, Marc-Oliver
Publisher: name: arXiv
Year: 2019
Subjects: subject: Econometrics (econ.EM)
subject: FOS: Economics and business

description: Long memory in the sense of slowly decaying autocorrelations is a stylized fact in many time series from economics and finance. The fractionally integrated process is the workhorse model for the analysis of these time series. Nevertheless, there is mixed evidence in the literature concerning its usefulness for forecasting and how forecasting based on it should be implemented. Employing pseudo-out-of-sample forecasting on inflation and realized volatility time series and simulations we show that methods based on fractional integration clearly are superior to alternative methods not accounting for long memory, including autoregressions and exponential smoothing. Our proposal of choosing a fixed fractional integration parameter of $d=0.5$ a priori yields the best results overall, capturing long memory behavior, but overcoming the deficiencies of methods using an estimated parameter. Regarding the implementation of forecasting methods based on fractional integration, we use simulations to compare local and global semiparametric and parametric estimators of the long memory parameter from the Whittle family and provide asymptotic theory backed up by simulations to compare different mean estimators. Both of these analyses lead to new results, which are also of interest outside the realm of forecasting.
Leveraging tagging data for recommender systems
Creators: name: Gedikli, Fatih
Publisher: name: Technische Universität Dortmund
Year: 2012
Subjects: subject: Algorithms
subject: Explanations
subject: Recommender systems
subject: Social tagging
subject: Social web
subject: Tag clouds
subject: Tag preferences
subject: 004

description: The goal of recommender systems is to provide personalized recommendations of products or services to users facing the problem of information overload on the Web. They provide personalized recommendations that best suit a customer's taste, preferences, and individual needs. Especially on large-scale Web sites where millions of items such as books or movies are offered to the users, recommender system technologies play an increasingly important role. One of their main advantages is that they reduce a user's decision-making effort. However, recommender systems are also of high importance from the service provider or system perspective. For instance, they can convince a customer to buy something or develop trust in the system as a whole which ensures customer loyalty and repeat sales gains. With the advent of the Social Web, user generated content has enriched the social dimension of the Web. New types of Web applications have emerged which emphasize content sharing and collaboration. These so-called Social Web platforms turned users from passive recipients of information into active and engaged contributors. As a result, the amount of user contributed information provided by the Social Web poses both new possibilities and challenges for recommender system research. This work deals with the question of how user-provided tagging data can be used to improve the quality of recommender systems. Tag-based recommendations and explanations are the two main areas of contribution in this work. The area of tag-based recommendations deals mainly with the topic of recommending items by exploiting tagging data. A tag recommender algorithm is proposed which can generate highly-accurate tag recommendations in real-time. Furthermore, the concept of user- and item-specific tag preferences is introduced in this work. By attaching feelings to tags users are provided a powerful means to express in detail which features of an item they particularly like or dislike. Additionally, new recommendation schemes are presented that can exploit tag preference data to improve recommendation accuracy. The area of tag-based explanations, on the other hand, deals with questions of how explanations for recommendations should be communicated to the user in the best possible way. New explanation methods based on personalized and non-personalized tag clouds are introduced. The personalized tag cloud interface makes use of the idea of user- and item-specific tag preferences. Furthermore, a first set of possible guidelines for designing or choosing an explanation interface for a recommender system is provided.
Weak epigraphical solutions to Hamilton-Jacobi-Bellman equations on infinite horizon
Creators: name: Basco, Vincenzo
Publisher: name: arXiv
Year: 2022
Subjects: subject: Analysis of PDEs (math.AP)
subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: In this paper we show a uniqueness result for weak epigraphical solutions of Hamilton-Jacobi-Bellman (HJB) equations on infinite horizon for a class of lower semicontinuous functions vanishing at infinity. Weak epigraphical solutions of HJB equations, with time-measurable data and fiber-convex, turn out to be viscosity solutions - in the classical sense - whenever they are locally Lipschitz continuous. Here we extend the notion of locally absolutely continuous tubes to set-valued maps with continuous epigraph of locally bounded variations. This new notion fits with the lack of uniform lower bound of the Fenchel transform of the Hamiltonian with respect to the fiber. Controllability assumptions are considered.
The Impact Of Reward And Benefit On Employee Retention: In The Case Of Commercial Bank Of Ethiopia
Creators: name: Adane, Mekdelawit
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2017

description: Researches have been undertaken by which they focused on achieving organizational goals through employees and little emphasis has been given to employee"s needs of reward and benefit that will make them stay in an organization. The purpose of this research was to determine the impacts of reward and benefit in employee retention in the Commercial Bank of Ethiopia. As a competitive advantage in every organization, employees need to be satisfied with the packages of reward and benefit for them to stay in the organization. Questionnaires were distributed for a sample population of 180 employees of the bank in order to find out results that describe the entire employees at the Commercial Bank of Ethiopia about their stand on selected rewards and benefits the bank offers i.e. payment ( salary, bonus and increments), personal security( medical facilities, insurances, compensation on layoffs), learning and development( trainings, carrier developments ), working environment( communications, suggestions and grievances, culture and emotional climate), financial assistance( mortgage loans, car loans and personal loans) to reach at their current status of staying in the organization. The findings show that employee needs on payments and financial assistance which took dominance as a factor of affecting employee retention in banking industry are not satisfied while more elements in the personal security, learning and development and working environment are more or less being met. It is recommended that the organization should continually review the reward and benefit practices to ensure alignment with the potential impact of changes in the macro environment and make different requirements of employees as a factor that will help retain experienced and talented employees
Magnetic Eigenmaps for the Visualization of Directed Networks
Creators: name: Fanuel, Michaël
name: Alaíz, Carlos M.
name: Fernández, Ángela
name: Suykens, Johan A. K.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Social and Information Networks (cs.SI)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: We propose a framework for the visualization of directed networks relying on the eigenfunctions of the magnetic Laplacian, called here Magnetic Eigenmaps. The magnetic Laplacian is a complex deformation of the well-known combinatorial Laplacian. Features such as density of links and directionality patterns are revealed by plotting the phases of the first magnetic eigenvectors. An interpretation of the magnetic eigenvectors is given in connection with the angular synchronization problem. Illustrations of our method are given for both artificial and real networks.
Hepatotoxicity induced by zoledronic acid in an aged woman with primary osteoporosis
Creators: name: Fang, Fusheng
name: Jin, Mengmeng
name: Li, Chunlin
name: Li, Jian
name: Liu, Minyan
name: Lu, Yanhui
name: Ma, Lichao
name: Pei, Yu
name: Shao, Yinghong
name: Yan, Shuangtong
Publisher: name: Technische Universität Dortmund
Year: 2013
Subjects: subject: bisphosphonates
subject: hepatotoxicity
subject: osteoporosis
subject: 610

description: Zoledronic acid, a bisphosphonate, has been approved for treatment and prevention of osteoporosis. This case describes a 73-year-old woman with primary osteoporosis who developed transient hepatotoxicity after zoledronic acid (ZOL) treatment. Three days after ZOL infusion, aspartate aminotransferase (AST), alanine aminotransferase (ALT), and gamma-glutamyltransferase (GGT) were increased by 9.9, 8.1, and 3.7 times, respectively, compared with pretreatment values. Liver protective agents were administered. The aminotransferase returned within normal ranges 12 days post-infusion. Currently, the relationship of ZOL and liver damage is not quite clear, which cannot be explained by its pharmacokinetics. The aim of this case report is to increase the clinician’s awareness of the possible adverse effect on the liver, and ZOL should be cautiously administered in patients with liver disease.
description: EXCLI Journal ; Vol. 12, 2013
Irrelevance of Conceptions of a Good Life for Sustainable Development – on Pretended Trade-offs between Economic Product and Well-Being
Creators: name: Pissarskoi, Eugen
Publisher: name: University of Tübingen
Year: 2023

description: The paper analyses the disagreement about the relationship between consumption levels and quality of life. Firstly, it provides an interpretation of the long standing controversy. It results from divergent assessment of the importance of particular components of one's quality of life within the overall account of one's quality of life. Secondly, it argues that the controversy about the relationship between consumption levels and quality of life can be decided on the basis of evidence and moral reasoning.
Ordered creation and motion of skyrmions with surface acoustic wave
Creators: name: Chen, Ruyi
name: Chen, Chong
name: Han, Lei
name: Liu, Peisen
name: Su, Rongxuan
name: Zhu, Wenxuan
name: Zhou, Yongjian
name: Pan, Feng
name: Song, Cheng
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Magnetic skyrmions with a well-defined spin texture have shown unprecedented potential for various spintronic applications owning to their topologically non-trivial and quasiparticle properties. To put skyrmions into practical technology, efficient manipulation, especially the inhibition of skyrmion Hall effect (SkHE) has been intensively pursued. In spite of the recent progress made on reducing SkHE in several substituted systems, such as ferrimagnets and synthetic antiferromagnets, the organized creation and current driven motion of skyrmions with negligible SkHE in ferromagnets remain challenging. Here, by embeding the [Co/Pd] multilayer into a surface acoustic wave (SAW) delay line, we experimentally realized the ordered generation of magnetic skyrmions. The resultant current-induced skyrmions movement with negligible SkHE was observed, which can be attributed to the energy redistribution of the system during the excitation of SAW. Our findings open up an unprecedentedly new perspective for manipulating topological solitons, and would advance the development of skyrmionics and spin acousto-electronics.
description: 23 pages, 4 figures
Fenugreek seed extract treats peripheral neuropathy in pyridoxine induced neuropathic mice
Creators: name: Mirjalili, Azam
name: Moghadam, Farshad Homayouni
name: Shafiee, Mohammad
name: Vakili-Zarch, Behzad
Publisher: name: Technische Universität Dortmund
Year: 2013
Subjects: subject: peripheral neuropathy
subject: pyridoxine
subject: Trigonella foenum graecum
subject: 610

description: Trigonella foenum graecum commonly known as Fenugreek exerts normoglycemic and insulinotropic effects in humans by compounds from its seed and leaf extracts. Some studies reported that treating pregnant mice with fenugreek seed could cause toxic effects on the nervous system of its pubs during developmental growth, while in some other studies neuroprotective properties were considered for it. Safety of anti-diabetic drugs for nervous system is very important because peripheral neuropathy is a common complication of diabetes and hazardous drugs could worsen it. In this study, the effect of treatment with fenugreek seed extract on the function of sciatic nerves of neuropathic mice was evaluated. Neuropathy was induced in male mice by pyridoxine intoxication. After that, animals were treated with 0.2, 2 and 20 mg/kg of hydro-alcoholic extract of fenugreek seeds for 10 days, tail flick, electrophysiological and histological assays were performed to evaluate the effect of fenugreek seed extract on function of the peripheral nerves. Our data showed that fenugreek has anti neuropathic effect and restores the function of nerve fibers. Results of electrophysiological recordings stated that the highest rate of healing was occurred in 20 mg/kg fenugreek extract treated animals. In conclusion, findings of the present study demonstrate that treatment with fenugreek seed extract can potentially facilitate healing from pyridoxine induced peripheral neuropathy in mice.
description: EXCLI Journal ; Vol. 12, 2013
Metals in the z~3 intergalactic medium: results from an ultra-high signal-to-noise ratio UVES quasar spectrum
Creators: name: D'Odorico, V.
name: Cristiani, S.
name: Pomante, E.
name: Carswell, R. F.
name: Viel, M.
name: Barai, P.
name: Becker, G. D.
name: Calura, F.
name: Cupani, G.
name: Fontanot, F.
name: Haehnelt, M. G.
name: Kim, T-S.
name: Miralda-Escude, J.
name: Rorai, A.
name: Tescari, E.
name: Vanzella, E.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: In this work, we investigate the abundance and distribution of metals in the intergalactic medium (IGM) at $\langle z \rangle \simeq 2.8$ through the analysis of an ultra-high signal-to-noise ratio UVES spectrum of the quasar HE0940-1050. In the CIV forest, our deep spectrum is sensitive at $3\,σ$ to lines with column density down to $\log N_{\rm CIV} \simeq 11.4$ and in 60 per cent of the considered redshift range down to $\simeq11.1$. In our sample, all HI lines with $\log N_{\rm HI} \ge 14.8$ show an associated CIV absorption. In the range $14.0 \le \log N_{\rm HI} <14.8$, 43 per cent of HI lines has an associated CIV absorption. At $\log N_{\rm HI} < 14.0$, the detection rates drop to $<10$ per cent, possibly due to our sensitivity limits and not to an actual variation of the gas abundance properties. In the range $\log N_{\rm HI} \ge 14$, we observe a fraction of HI lines with detected CIV a factor of 2 larger than the fraction of HI lines lying in the circum-galactic medium (CGM) of relatively bright Lyman-break galaxies hosted by dark matter haloes with $\langle M\rangle \sim10^{12}$ M$_{\odot}$. The comparison of our results with the output of a grid of photoionization models and of two cosmological simulations implies that the volume filling factor of the IGM gas enriched to a metallicity $\log Z/Z_{\odot} \ge -3$ should be of the order of $\sim 10-13$ percent. In conclusion, our results favour a scenario in which metals are found also outside the CGM of bright star-forming galaxies, possibly due to pollution by lower mass objects and/or to an early enrichment by the first sources.
description: 23 pages, 28 figures. Accepted by MNRAS on 2016 August 24. Received 2016 August 10; in original form 2016 April 15
Representation of Weak Solutions of Convex Hamilton-Jacobi-Bellman Equations on Infinite Horizon
Creators: name: Basco, Vincenzo
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: In the present paper, it is provided a representation result for the weak solutions of a class of evolutionary Hamilton-Jacobi-Bellman equations on infinite horizon, with Hamiltonians measurable in time and fiber convex. Such Hamiltonians are associated with a - faithful - representation, namely involving two functions measurable in time and locally Lipschitz in the state and control. Our results concern the recovering of a representation of convex Hamiltonians under a relaxed assumption on the Fenchel transform of the Hamiltonian with respect to the fiber. We apply them to investigate the uniqueness of weak solutions, vanishing at infinity, of a class of time-dependent Hamilton-Jacobi-Bellman equations. Assuming a viability condition on the domain of the aforementioned Fenchel transform, these weak solutions are regarded as an appropriate value function of an infinite horizon control problem under state constraints.
Human character as expresses in functional objects such as the teapot
Creators: name: Suh, Jeong Taek.
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.
Development of a multi-sensor perceptual system for mobile robot and EKF-based localization
Creators: name: Hoang, T. T.
name: Duong, P. M.
name: Van, N. T. T.
name: Viet, D. A.
name: Vinh, T. Q.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Robotics (cs.RO)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper presents the design and implementation of a perceptual system for the mobile robot using modern sensors and multi-point communication channels. The data extracted from the perceptual system is processed by a sensor fusion model to obtain meaningful information for the robot localization and control. Due to the uncertainties of acquiring data, an extended Kalman filter was applied to get optimal states of the system. Several experiments have been conducted and the results confirmed the functioning operation of the perceptual system and the efficiency of the Kalman filter approach.
description: In 2012 International Conference on Systems and Informatics (ICSAI). arXiv admin note: substantial text overlap with arXiv:1611.07112, arXiv:1611.07114
Intelligent problem-solving as integrated hierarchical reinforcement learning
Creators: name: Eppe, Manfred
name: Gumbsch, Christian
name: Kerzel, Matthias
name: Nguyen, Phuong D. H.
name: Butz, Martin V.
name: Wermter, Stefan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: According to cognitive psychology and related disciplines, the development of complex problem-solving behaviour in biological agents depends on hierarchical cognitive mechanisms. Hierarchical reinforcement learning is a promising computational approach that may eventually yield comparable problem-solving behaviour in artificial agents and robots. However, to date the problem-solving abilities of many human and non-human animals are clearly superior to those of artificial systems. Here, we propose steps to integrate biologically inspired hierarchical mechanisms to enable advanced problem-solving skills in artificial agents. Therefore, we first review the literature in cognitive psychology to highlight the importance of compositional abstraction and predictive processing. Then we relate the gained insights with contemporary hierarchical reinforcement learning methods. Interestingly, our results suggest that all identified cognitive mechanisms have been implemented individually in isolated computational architectures, raising the question of why there exists no single unifying architecture that integrates them. As our final contribution, we address this question by providing an integrative perspective on the computational challenges to develop such a unifying architecture. We expect our results to guide the development of more sophisticated cognitively inspired hierarchical machine learning architectures.
description: Published as accepted article in Nature Machine Intelligence: https://www.nature.com/articles/s42256-021-00433-9. arXiv admin note: substantial text overlap with arXiv:2012.10147
Creating Stein surfaces by topological isotopy
Creators: name: Gompf, Robert E.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Geometric Topology (math.GT)
subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 57K40, 32Q28, 32T15

description: We combine Freedman's topology with Eliashberg's holomorphic theory to construct Stein neighborhood systems in complex surfaces, and use these to study various notions of convexity and concavity. Every tame, topologically embedded 2-complex K in a complex surface, after C^0-small topological ambient isotopy, is the intersection of an uncountable nested family of Stein regular neighborhoods that are all topologically ambiently isotopic rel K, but frequently realize uncountably many diffeomorphism types. These arise from the Cantor set levels of a topological mapping cylinder. The boundaries of the neighborhoods are 3-manifolds that are only topologically embedded, but still satisfy a notion of pseudoconvexity. Such 3-manifolds share some basic properties of hypersurfaces that are strictly pseudoconvex in the usual smooth sense, but they are far more common. The complementary notion of topological pseudoconcavity is realized by uncountably many diffeomorphism types homeomorphic to R^4.
description: 32 pages, 9 figures. This version to appear in J. Differ. Geom. Definition of topologically pseudoconvex 4-manifold simplified. Exposition significantly improved in various places. Figures added
Transiente Modellierung koaxialer Spulensysteme unter Berücksichtigung nichtlinearer Materialeigenschaften
Creators: name: Cernat, Radu-Marian
Publisher: name: Technische Universität Dortmund
Year: 2013
Subjects: subject: Elektromagnetisches Feld
subject: Finite-Elemente-Methode
subject: Hubmagnet
subject: Magnetismus
subject: Transiente Feldberechnung
subject: Zündtransformator
subject: 620

description: Die vorliegende Dissertation behandelt die Modellierung koaxialer Spulensysteme mit der finiten Elementen Methode an den Anwendungsfällen Zündtransformator und Hubmagnet. Hierfür wird ein nichtlineares Modell für die magnetischen und elektrischen Materialeigenschaften aufgestellt und an die besonderen Anforderungen der FEM-Berechnung angepasst. Im Anschluss werden die elektrische und magnetische Feldverteilung im transienten Fall und deren gegenseitige Beeinflussung ermittelt. Parasitäre Elemente wie die Streuinduktivität oder die Wicklungskapazität sowie die auftretenden Verluste werden ortsaufgelöst berücksichtigt. Ausgleichsvorgänge innerhalb des Spulensystems werden realitätsgetreu nachgebildet, wodurch eine potentielle punktuelle Überbeanspruchung der eingesetzten Werkstoffe visualisiert wird.
Analytization of elastic scattering amplitude
Creators: name: Troshin, S. M.
name: Tyurin, N. E.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Scenario for restoration of the real part of the elastic scattering amplitude has been proposed for the unitarity saturation case. Dependence of the real part of the elastic scattering amplitude on the transferred momentum $-t$ at the asymptotical energies has been restored from the corresponding imaginary part on the basis of derivative analyticity relations (analytization procedure).
description: 9 pages, 1 figure, revised and extended discussion
L1 penalization of volumetric dose objectives in optimal control of PDEs
Creators: name: Barnard, Richard C.
name: Clason, Christian
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: This work is concerned with a class of optimal control problems governed by a partial differential equation that are motivated by an application in radiotherapy treatment planning, where the primary design objective is to minimize the volume where a functional of the state violates a prescribed level, but prescribing these levels in the form of pointwise state constraints can lead to infeasible problems. We therefore propose an alternative approach based on $L^1$ penalization of the violation. We establish well-posedness of the corresponding optimal control problem, derive first-order optimality conditions, and present a semismooth Newton method for the efficient numerical solution of these problems. The performance of this method for a model problem is illustrated and contrasted with the alternative approach based on (regularized) state constraints.
description: Computational Optimization and Applications, Online First (2017)
Landscapes of desire and melancholy : a studio investigation
Creators: name: Runnegar, Brenda.
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.
Similarity-and-Independence-Aware Beamformer: Method for Target Source Extraction using Magnitude Spectrogram as Reference
Creators: name: Hiroe, Atsuo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Audio and Speech Processing (eess.AS)
subject: Sound (cs.SD)
subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: This study presents a novel method for source extraction, referred to as the similarity-and-independence-aware beamformer (SIBF). The SIBF extracts the target signal using a rough magnitude spectrogram as the reference signal. The advantage of the SIBF is that it can obtain an accurate target signal, compared to the spectrogram generated by target-enhancing methods such as the speech enhancement based on deep neural networks (DNNs). For the extraction, we extend the framework of the deflationary independent component analysis, by considering the similarity between the reference and extracted target, as well as the mutual independence of all potential sources. To solve the extraction problem by maximum-likelihood estimation, we introduce two source model types that can reflect the similarity. The experimental results from the CHiME3 dataset show that the target signal extracted by the SIBF is more accurate than the reference signal generated by the DNN. Index Terms: semiblind source separation, similarity-and-independence-aware beamformer, deflationary independent component analysis, source model
description: Accepted in INTERSPEECH 2020
Tracing the gravitational potential using cosmic voids
Creators: name: Nadathur, Seshadri
name: Hotchkiss, Shaun
name: Crittenden, Robert
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The properties of large underdensities in the distribution of galaxies in the Universe, known as cosmic voids, are potentially sensitive probes of fundamental physics. We use data from the MultiDark suite of N-body simulations and multiple halo occupation distribution mocks to study the relationship between galaxy voids, identified using a watershed void-finding algorithm, and the gravitational potential $Φ$. We find that the majority of galaxy voids correspond to local density minima in larger-scale overdensities, and thus lie in potential wells. However, a subset of voids can be identified that closely trace maxima of the gravitational potential and thus stationary points of the velocity field. We identify a new void observable, $λ_v$, which depends on a combination of the void size and the average galaxy density contrast within the void, and show that it provides a good proxy indicator of the potential at the void location. A simple linear scaling of $Φ$ as a function of $λ_v$ is found to hold, independent of the redshift and properties of the galaxies used as tracers of voids. We provide an accurate fitting formula to describe the spherically averaged potential profile $Φ(r)$ about void centre locations. We discuss the importance of these results for the understanding of the evolution history of voids, and for their use in precision measurements of the integrated Sachs-Wolfe effect, gravitational lensing and peculiar velocity distortions in redshift space.
description: 14 pages, 9 figures. Minor changes to match version accepted for publication in MNRAS
Convection-induced compositional patterning at grain boundaries in irradiated alloys
Creators: name: Moladje, G. F. Bouobda
name: Averback, R. S.
name: Bellon, P.
name: Thuinet, L.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We consider the stability of precipitates formed at grain boundaries (GBs) by radiation-induced segregation in dilute alloys subjected to irradiation. The effects of grain size and misorientation of symmetric-tilt GBs are quantified using phase field modeling. A novel regime is identified where, at long times, GBs are decorated by precipitate patterns that resist coarsening. Maps of the diffusional Péclet number indicate that arrested coarsening takes place when solute advection dominates over thermal diffusion right up to the precipitate/matrix interface, overwhelming capillary effects. This contrasts with liquid-solid mixtures where convection only accelerates coarsening.
description: 29 pages, main text with 3 figures, 1 table, 1 supplemental information document
Investigation on biological activities of anthranilic acid sulfonamide analogs
Creators: name: Doungsoongnuen, Sutanun
name: Pingaew, Ratchanok
name: Prachayasittikul, Supaluk
name: Prachayasittikul, Virapong
name: Ruchirawat, Somsak
name: Suksrichavalit, Thummaruk
name: Worachartcheewan, Apilak
Publisher: name: Technische Universität Dortmund
Year: 2011
Subjects: subject: anthranilic acid
subject: antimicrobials
subject: antioxidants
subject: cytotoxicity
subject: sulfonamides
subject: 610

description: In the previous studies, the cytotoxicities of anthranilate sulfonamides were investigated. Herein, the bioactivities of 4-substituted (X = NO2, OCH3, CH3, Cl) benzenesulfonamides of anthranilic acid (5-8) are reported. The results revealed that all sulfonamides selectively exerted antifungal activity (25-50 % inhibition) against C. albicans at 4 μg/mL. Furthermore, compounds 6 and 8 show antioxidative (SOD) activity. These sulfonamides, except for 6, selectively display cytotoxic effects toward MOLT-3 cells. It is interesting to note that sulfonamides with electron withdrawing substituent (5, X = NO2) exhibited the highest cytotoxicity. This study provided preliminary structure-activity relationship of the anthranilic sulfonamides that is useful for further in-depth investigation.
description: EXCLI Journal ; Vol. 10, 2011
A Structure Theorem on Intersections of General Doubling Measures and Its Applications
Creators: name: Anderson, Theresa C.
name: Hu, Bingyang
Publisher: name: arXiv
Year: 2020
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: We unite two themes in dyadic analysis and number theory by studying an analogue of the failure of the Hasse principle in harmonic analysis. Explicitly, we construct an explicit family of measures on the real line that are $p$-adic and $q$-adic doubling for any distinct primes $p$ and $q$, yet not doubling, and we apply these results to show analogous statements about the reverse Hölder and Muckenhoupt $A_p$ classes of weights. The proofs involve a delicate interplay among several geometric and number theoretic properties.
description: 46 pages, 9 figures. Extending construction to a finite set of primes is a difficult problem and the short extension claimed here does not work. All results continue to hold for two primes. The final version of this article has just appeared in IMRN, thus the arXiv version has not been updated. Title updated to match published version
Fubini-Study metrics and Levi-Civita connections on quantum projective spaces
Creators: name: Matassa, Marco
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics

description: We introduce analogues of the Fubini-Study metrics and the corresponding Levi-Civita connections on quantum projective spaces. We define the quantum metrics as two-tensors, symmetric in the appropriate sense, in terms of the differential calculi introduced by Heckenberger and Kolb. We define connections on these calculi and show that they are torsion free and cotorsion free, where the latter condition uses the quantum metric and is a weaker notion of metric compatibility. Finally we show that these connections are bimodule connections and that the metric compatibility also holds in a stronger sense.
description: 42 pages. v4: minor corrections to the published version. Fixed an erroneous sign in equation (4.2); generalized the statement of Lemma 5.4 (which was only valid in the quadratic case)
Light, water, air : an exploration of the sublime
Creators: name: Henriksen, Kari.
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.