cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Appraisal of data-driven and mechanistic emulators of nonlinear hydrodynamic urban drainage simulators
Creators: name: Carbajal, Juan Pablo
name: Leitão, João Paulo
name: Albert, Carlo
name: Rieckermann, Jörg
Publisher: name: arXiv
Year: 2016
Subjects: subject: Methodology (stat.ME)
subject: Computational Engineering, Finance, and Science (cs.CE)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences
subject: J.2; G.3; G.1.2; G.1.3; G.1.6

description: Many model based scientific and engineering methodologies, such as system identification, sensitivity analysis, optimization and control, require a large number of model evaluations. In particular, model based real-time control of urban water infrastructures and online flood alarm systems require fast prediction of the network response at different actuation and/or parameter values. General purpose urban drainage simulators are too slow for this application. Fast surrogate models, so-called emulators, provide a solution to this efficiency demand. Emulators are attractive, because they sacrifice unneeded accuracy in favor of speed. However, they have to be fine-tuned to predict the system behavior satisfactorily. Also, some emulators fail to extrapolate the system behavior beyond the training set. Although, there are many strategies for developing emulators, up until now the selection of the emulation strategy remains subjective. In this paper, we therefore compare the performance of two families of emulators for open channel flows in the context of urban drainage simulators. We compare emulators that explicitly use knowledge of the simulator's equations, i.e. mechanistic emulators based on Gaussian Processes, with purely data-driven emulators using matrix factorization. Our results suggest that in many urban applications, naive data-driven emulation outperforms mechanistic emulation. Nevertheless, we discuss scenarios in which we think that mechanistic emulation might be favorable for i) extrapolation in time and ii) dealing with sparse and unevenly sampled data. We also provide many references to advances in the field of Machine Learning that have not yet permeated into the Bayesian environmental science community.
description: This article was published in Environmental Modelling and Software, 7 figures, 4 tables
The ABC of RPV: Classification of R-Parity Violating Signatures at the LHC for Small Couplings
Creators: name: Dreiner, Herbi K.
name: Koay, Yong Sheng
name: Köhler, Dominik
name: Lozano, Víctor Martín
name: Berlingen, Javier Montejo
name: Nangia, Saurabh
name: Strobbe, Nadja
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We perform a classification of all potential supersymmetric $R$-parity violating signatures at the LHC to address the question: are existing bounds on supersymmetric models robust, or are there still signatures not covered by existing searches, allowing LHC-scale supersymmetry to be hiding? We analyze all possible scenarios with one dominant RPV trilinear coupling at a time, allowing for arbitrary LSPs and mass spectra. We consider direct production of the LSP, as well as production via gauge-cascades, and find 6 different experimental signatures for the $LL\bar E$-case, 6 for the $LQ\bar D$-case, and 5 for the $\bar U\bar D\bar D$-case; together these provide complete coverage of the RPV-MSSM landscape. This set of signatures is confronted with the existing searches by \texttt{ATLAS} and \texttt{CMS}. We find all signatures have been covered at the LHC, although not at the sensitivity level needed to probe the direct production of all LSP types. For the case of a dominant $LL\bar E$-operator, we use \texttt{CheckMATE} to quantify the current lower bounds on the supersymmetric masses and find the limits to be comparable to or better than the $R$-parity conserving case. Our treatment can be easily extended to scenarios with more than one non-zero RPV coupling.
description: 42 pages + references, 8 figures, 31 tables, accepted for publication in JHEP
Remote work : how it came to be, its current status and what it may look like
Creators: name: Kim, Gyeongmo
name: 0009-0003-5945-6539
Publisher: name: The University of Texas at Austin
Year: 2023
Subjects: Remote work
Telework
Telecommuting
COVID-19
Work autonomy

description: Since the rise of COVID-19 in 2020, workers in numerous fields and industry had to make a major transition to remote work to minimize commuting and thus spread of the infection. As the new normalcy set in, new phenomenon and workplace conflicts emerged. But remote work is no novel way of working, as it emerged as a legitimate mode of labor during the early days of Industrial Revolution, with the modern concept of remote work being proposed decades before the Internet was widely available to the public. This Master’s Report is a literature review that outlines the context of remote work, its current position in office work cultures with emphasis on the transition to remote work in 2020, and its potential future direction in what kind of position remote work would have in terms of work organization and work practice. Outside of academic journals, a variety of sources such as historical accounts, law review and investigative news reports have been considered to paint a better picture of the significance of remote work.
Smooth backfitting in additive inverse regression
Creators: name: Bissantz, Nicolai
name: Dette, Holger
name: Hildebrandt, Thimo
Publisher: name: Technische Universität Dortmund
Year: 2013
Subjects: subject: additive models
subject: curse of dimensionality
subject: inverse regression
subject: smooth back tting
subject: 310
subject: 330
subject: 620

description: We consider the problem of estimating an additive regression function in an inverse regression model with a convolution type operator. A smooth back fitting procedure is developed and asymptotic normality of the resulting estimator is established. Compared to other methods for the estimation in additive models the new approach neither requires observations on a regular grid nor the estimation of the joint density of the predictor. It is also demonstrated by means of a simulation study that the backfitting estimator outperforms the marginal integration method at least by a factor two with respect to the integrated mean squared error criterion.
description: Discussion Paper / SFB 823;37/2013
The Effect of Corporate Social Responsibility on Brand Equity: The case of Awash Bank S.C
Creators: name: Tekletsion, Selam
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2018

description: This paper deals with analysis of Corporate Social Responsibility features and brand Equity. The purpose of the study was to find out the effect of Corporate Social Responsibility on brand Equity: the case of Awash Bank S.C. Accordingly, the research models were composed of three independent variables such as environmental responsibility, societal responsibility and stakeholder responsibility while there is one dependent variable which is brand equity. Furthermore hypotheses were developed to shown the effect of all the independent variables of corporate social responsibility on the dependent variable of brand equity. To this end, a structured 5-point Likert scale close ended questionnaire based survey was employed to collect data. For the customers of sixteen selected Awash bank branches regions found in Addis Ababa. More specifically 400 questionnaires were distributed and 376 (94 %) were returned back for analysis. The correlation analysis was illustrated to examine the relationship between those variables and effects of the factors was reported and analyzed by using multiples liner regression. Descriptive statistics also conducted in the research through the aid of Statistical Package for Social Science version 24 (SPSS). The findings of the study revealed that among the independent variables of environmental responsibility significantly affect brand equity of Awash bank. Concerning to societal responsibility the beta value as well as the p-value told that those factors positively and significantly affect brand equity of Awash bank. Another promising finding was also told that stakeholders responsibility are considered as a factor and which positively and significantly affect brand equity. Based on the finding, the researcher tried to forward a recommendation that management of Awash bank should focus and working on the above statistically significant factor in order to enhance and improve the bank image in the near future
Excited Hydroxyl Outflow in the High-Mass Star-Forming Region G34.26+0.15
Creators: name: Tan, W. S.
name: Araya, E. D.
name: Rigg, C.
name: Hofner, P.
name: Kurtz, S.
name: Linz, H.
name: Rosero, V.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: G34.26+0.15 is a region of high-mass star formation that contains a broad range of young stellar objects in different stages of evolution, including a hot molecular core, hyper-compact HII regions and a prototypical cometary ultra-compact HII region. Previous high-sensitivity single dish observations by our group resulted in the detection of broad 6035 MHz OH absorption in this region; the line showed a significant blue-shifted asymmetry indicative of molecular gas expansion. We present high-sensitivity Karl G. Jansky Very Large Array (VLA) observations of the 6035 MHz OH line conducted to image the absorption and investigate its origin with respect to the different star formation sites in the region. In addition, we report detection of 6030 MHz OH absorption with the VLA and further observations of 4.7 GHz and 6.0 GHz OH lines obtained with the Arecibo Telescope. The 6030 MHz OH line shows a very similar absorption profile as the 6035 MHz OH line. We found that the 6035 MHz OH line absorption region is spatially unresolved at $\sim 2$" scales, and it is coincident with one of the bright ionized cores of the cometary HII region that shows broad radio recombination line emission. We discuss a scenario where the OH absorption is tracing the remnants of a pole-on molecular outflow that is being ionized inside-out by the ultra-compact HII region.
description: 19 pages, 6 figures. Accepted for publication in The Astrophysical Journal
Optimization of Drying Parameters for "Moisture Reduced Teff Injera Making" Using Response Surface Methodology
Creators: name: Dessalegn, Abit
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2019

description: Teff Injera is the staple Ethiopian fermented bread processed from fermented tef [Eragrostis tef (Zucc.) Trotter] grain flour." Dirkosh" is the Amharic name given to the dried /moisture reduced injera. The current potential need of the super food, Teff and its products like injera and its dried form, Dirkosh needs a scientific research that will increase its quality, healthy and market demand. Therefore, the objective of the study was to prepare and optimize the drying parameters of Dirkosh using computer controlled tray dryer. The selected drying parameters were (drying air temperature, air velocity and sample loading density) in response of the most quality parameters of the final dried injera/Dirkosh. The response variables were the final moisture content, drying time, color, texture, overall acceptability, water activity and drying rate. The optimization process done by using Box-Behnken Design, response surface methodology (RSM). Drying process factors ( (drying air temperature(55-65 C), air velocity(0.5-1.5m/s) and sample loading density(12kg/m o 2 )) were considered and made 15 experimental runs of Dirkosh drying including 3 replicates using RSM. The investigated responses were final moisture content(5.43), color(6.02), texture(6.23), overall acceptability(6.05), water activity(0.274) but drying time and drying rate were not significant model terms but it was possible to estimate the drying kinetics using the better drying process parameters. RSM with Box-Behnken Design was used to develop and optimize drying process factors in response of the dried injera. Moreover, both numerical and graphical optimizations were carried out to determine the optimum values of Dirkosh in terms significant model terms. The optimum process factors of drying process parameters were drying air temperature of 55 with a desirability of 0.65. The study showed that all the drying process factors were important parameters influencing the physicochemical and sensory qualities of Dirkosh.
Remote robotic manipulation task execution using affordance primitives
Creators: name: Pettinger, Adam
name: 0000-0003-0341-7680
Publisher: name: The University of Texas at Austin
Year: 2023
Subjects: Robotic manipulation
Motion planning

description: In recent years, an increasing number of robots have been deployed to an increasing number of environments to do an increasing number of tasks. Often the goal is for these robots to operate with as little human intervention as possible, and this remains a challenge for tasks that involve sustained physical interaction between the robot and environment. The problems compound if the robot is located far from its operators, where the remote connection between robot and operator may have significant latency, making both control and feedback difficult. Addressing these challenges by increasing autonomy for such contact tasks is critical for scaling robot deployment outside of lab or manufacturing settings, and into the real world. This dissertation focuses on improving the ability of robots to complete contact tasks with objects designed for humans, such as doors, valves, etc. These objects are inherently interesting to manipulate (i.e. because they do something), vary widely, and are widespread in many environments. Manipulating them effectively expands the areas robots may be deployed for manipulation, and has navigation implications as well (e.g. traversing doors or elevators). This work introduces affordance primitives as the instantaneous spatial and force profile for contact tasks, and uses them to improve robotic manipulation of articulated objects. Affordance primitives may be used as virtual fixtures during real-time teleoperated control, or autonomously with a flexible and reactive motion planner presented in this dissertation. They are based on screw theory, and naturally capture simply articulated objects with one or more degrees of freedom. The implementation of affordance primitives is agnostic to the task, environment, and robot hardware, and allows flexibility in the control input from the user or autonomously. The contributions of this work include reducing operator burden during teleoperated tasks, modeling generic tasks using affordance primitives, and enhancing autonomous execution of tasks modeled with affordance primitives. Using affordance primitives leads to a 5x improvement in task duration and 3x reduction in contact forces over prior work while being robust to errors in the task model up to 10cm and 20°. This dissertation advances the capabilities of robotic manipulators in remote settings, and works to address the robot scaling problem to deploy more manipulators to the real world
Two-Loop Electron Factor Contribution to Lamb Shift in Muonium and Positronium
Creators: name: Eides, Michael I.
name: Shelyuto, Valery A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We calculate hard spin-independent contributions to energy levels in muonium and positronium which are due to radiatively corrected electron factor insertion in two-photon exchange diagrams. Calculation of these corrections is motivated by the new round of precise measurements of spin-independent transition frequencies in muonium and positronium.
description: 7 pages, 3 figures
Detection of radio emission from stars via proper-motion searches
Creators: name: Driessen, Laura Nicole
name: Heald, George
name: Duchesne, Stefan W.
name: Murphy, Tara
name: Lenc, Emil
name: Leung, James K.
name: Moss, Vanessa A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present a method for identifying radio stellar sources using their proper-motion. We demonstrate this method using the FIRST, VLASS, RACS-low and RACS-mid radio surveys, and astrometric information from Gaia Data Release 3. We find eight stellar radio sources using this method, two of which have not previously been identified in the literature as radio stars. We determine that this method probes distances of ~90pc when we use FIRST and RACS-mid, and ~250pc when we use FIRST and VLASS. We investigate the time baselines required by current and future radio sky surveys to detect the eight sources we found, with the SKA (6.7 GHz) requiring <3 years between observations to find all eight sources. We also identify nine previously known and 43 candidate variable radio stellar sources that are detected in FIRST (1.4 GHz) but are not detected in RACS-mid (1.37 GHz). This shows that many stellar radio sources are variable, and that surveys with multiple epochs can detect a more complete sample of stellar radio sources.
description: 20 pages, 6 figures, 6 tables, accepted for publication in PASA
Memory imagination and motion : an exploration into the subjective experience in studio practice
Creators: name: Wilson., Anne
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.
An early reading intervention to reduce the risk for reading failure : outcomes and perceptions of implementation
Creators: name: Howard, Sonja Lynnette
name: 0000-0002-9967-8844
Publisher: name: The University of Texas at Austin
Year: 2022
Subjects: Early reading intervention
Early reading

description: Students who live in poverty often struggle to learn to read. The percentage of students experiencing reading difficulties in the first years of schooling can be reduced by the use of high-quality instruction and intervention (Reynolds et al., 2011). School district leaders need to understand the outcomes and challenges of reading programs designed to ameliorate reading difficulties among at-risk students. The purpose of this mixed methods study was to examine the outcomes and perceptions of implementation of an early reading program in a high minority, high poverty suburban school district. The academic outcomes of kindergarten, first-grade, and second-grade students who participated in an early reading intervention were compared to kindergarten, first-grade, and second-grade students who qualified but did not participate. The perceptions of the campus-level staff stakeholders who worked with these students were analyzed. This study used an explanatory sequential format for the mixed methods case study design. For the quantitative analysis of this study, reading scores of students in kindergarten, first grade and second grade who received the reading program tutoring were compared to students in kindergarten, first grade and second grade who did not receive reading program tutoring. Archived student data was collected from each of the grade-level cohorts from three school years (2018-2021) for students who qualified for, were selected to participate, and participated in the reading program for a minimum of 12 weeks. A survey provided perception of implementation information as well as allowed for recruiting participants to the next phase of the study that involves collecting and analyzing qualitative data through three separate focus group interviews. For the reading tutor focus group, two tutors were randomly selected from survey participants. Tutors who participated in the study were those who received formal training and provided reading program tutoring to six to 10 students for a minimum of 12 weeks. For the coach focus group, three coaches who supported and coached tutors in the reading tutoring program were randomly selected from the survey participants. For the principal focus group, two principals were randomly selected from the survey participants. The qualitative data were analyzed, and thematic findings were generated. The findings may help the study district gain an understanding of the practices that help prevent and intervene for reading difficulties in young children. The study district may use the findings to determine if the goals of the program are being met and potentially use that information to determine if the intervention program is worth the cost.
Observation of the "Self-Healing" of an Error Field Island in the Large Helical Device
Creators: name: Morisaki, T.
name: Narihara, K.
name: Tanaka, K.
name: Watanabe, K. Y.
name: Yamada, I.
Publisher: name: The American Physical Society
Year: 2001
Subjects: subject: 530

description: Physical Review Letters
Trade Liberalization and Patterns of Trade in Sub- Saharan Africa: A Panel Data Analysis
Creators: name: Lachisa, Gidisa
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2010

description: This paper examines the impact of trade liberalization on sectoral export performance of Sub-Saharan Africa countries using export supply function between the periods 1980 to 2006. The underlying base of the study is the theoretical justification that trade liberalization will lead countries to specialize and export commodities of their comparative advantage. A static panel data analysis based on fixed effect and random effect model was adopted. The main findings are while trade liberalization has a significant positive impact on manufactured export performance; its impact on primary commodity export performance is not worth mentioning. Production capacity of countries in SSA is important factor for the export performance of countries both at aggregate and disaggregate levels. The other explanatory variables are more important in explaining the manufactured export performance.
Orthogonal Analysis of Space-Time Crystals
Creators: name: Deck-Léger, Zoé-Lise
name: Bahrami, Amir
name: Li, Zhiyu
name: Caloz, Christophe
Publisher: name: arXiv
Year: 2023
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: This paper presents a space-time-wise orthogonal analysis of space-time crystals. This analysis provides a solution consisting of a pair of explicit parametric equations that result from a separate application of the Bloch-Floquet theorem in the (orthogonal) directions of space and time. Compared to previous approaches, this solution offers the benefits of greater simplicity, clearer emphasis on space-time duality and deeper physical insight.
description: letter (4 pages)
Le chien qui fume : a smokey life
Creators: name: Vale., Michael
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.
Factors Affecting Profitability: An Empirical Study on Ethiopian Banking Industry
Creators: name: Abera, Amdemikael
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2012

description: This study examines the bank-specific, industry-specific and macro-economic factors affecting bank profitability for a total of eight commercial banks in Ethiopia, covering the period of 2000-2011. To this end, the study adopts a mixed methods research approach by combining documentary analysis and in-depth interviews. The findings of the study show that capital strength, income diversification, bank size and gross domestic product have statistically significant and positive relationship with banks' profitability. On the other hand, variables like operational efficiency and asset quality have a negative and statistically significant relationship with banks' profitability. However, the relationship for liquidity risk, concentration and inflation is found to be statistically insignificant. The study suggests that focusing and reengineering the banks alongside the key internal drivers could enhance the profitability as well as the performance of the commercial banks in Ethiopia. Moreover, banks in Ethiopia should not only be concerned about internal structures and policies, but they must consider both the internal environment and the macroeconomic environment together in fashioning out strategies to improve their performance or profits. Finally, the government needs to revisit its requirements imposed solely on private banks like investing 27% of their total loans on bonds at a relatively lower interest rate
Increasing Access to Formal Agricultural Credit: The Role of Rural Producer Organisations
Creators: name: Benson, Allison
name: Faguet, Jean-Paul
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Evolutionary Biology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Science Policy

description: Access to agricultural credit contributes to rural development by allowing farmers to carry out profit-maximising investments that increase productivity and income, underlining the importance of exploring ways to increase access to this resource. This paper analyses the role of Rural Producer Organisations (RPOs) in easing access to formal agricultural credit. We build an original dataset comprising 15,000 municipality-year observations of RPO creation and credit allocation in Colombia to estimate a fixed effects model. We show that when the number of RPOs increases in a municipality, aggregate access to credit increases. This positive relation also holds at the individual level, with RPO membership increasing both the likelihood of a farmer requesting credit and of receiving the requested credit. We discuss demand and supply-side mechanisms that plausibly explain these results, and we further show that the relation between RPOs and access to credit is heterogeneous according to the source of credit (public vs. private bank) and the type of farmer to whom it is allocated (low-wealth, mid-wealth or high-wealth farmers). Our results point to the potential of RPOs to improve access not only to input and output markets but also to financial markets.
800V, 100A modular heatsink-less solid state circuit breaker
Creators: name: Choudhary, Rahul
name: 0000-0001-6381-7112
Publisher: name: The University of Texas at Austin
Year: 2022
Subjects: Solid-state circuit breaker
Heatsink-less

description: This thesis presents a modular, heatsink-less, silicon-based solid-state circuit breaker for 100A and scalable in voltage. Each module is implemented on a metal core printed circuit board (MCPCB) and can sustain 150V and 100A. The presented breaker is compared with compared to SiC-based breakers on the cost and weight front for 800V and 100A. Electrical stimulation of the power module and 800V,100A application is presented. Thermal simulation of the module is done on Fusion 360. Experimental characterization and validation of the module are provided. Lastly, a comparison of the proposed breaker and SiC breaker is provided on cost front.
Impact of Air Pollution on Mental Health in India
Creators: name: Balakrishnan, Uttara
name: Tsaneva, Magda
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biophysics
subject: Medicine
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Geology
subject: FOS: Earth and related environmental sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: Plant Biology
subject: FOS: Biological sciences

description: There is extensive evidence linking air pollution exposure to physical health. Less is known about the mental health impacts of poor air quality, especially in developing countries. We use data from India and estimate the causal impact of air pollution exposure on feeling sad, experiencing cognitive difficulties, and feeling unable to control and cope with important things in life. We instrument for air pollution exposure using the annual number of nighttime thermal inversions and show that air pollution exposure in the previous calendar year significantly worsens mental health in the current year. We examine potential mechanisms and find that air pollution exposure negatively impacts self-reported physical health, worsens respiratory conditions, and increases the likelihood of experiencing sleeping difficulties. Accounting for mental health impacts of pollution exposure is critical to accurately estimating the true health costs of air pollution and designing optimal environmental policy.
Community Health Educators and Maternal Health: Experimental Evidence from Northern Nigeria
Creators: name: Nyqvist, Martina Björkman
name: Leight, Jessica
name: Sharma, Vandana
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: Science Policy

description: The slow pace of improvement in service delivery and health outcomes for pregnant women and newborns in developing countries has been a major concern for policy makers in recent decades. This paper presents the results from a randomized controlled trial of a community health worker program designed to enhance uptake of child and maternal health services in Northern Nigeria. Three interventions were evaluated: the deployment of community health educators, health educators with the provision of safe birth kits, and health educators with community dramas. The results suggest that the interventions increased utilization of antenatal, postnatal, and infant care. Maternal and newborn health practices improved as well as health knowledge. In addition, the community health worker program was more effective when supplemented with additional program components.
On Wright's generalized Bessel kernel
Creators: name: Zhang, Lun
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mathematical Physics (math-ph)
subject: Classical Analysis and ODEs (math.CA)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: In this paper, we consider the Wright's generalized Bessel kernel $K^{(α,θ)}(x,y)$ defined by $$θx^α\int_0^1J_{\frac{α+1}θ,\frac{1}θ}(ux)J_{α+1,θ}((uy)^θ)u^α\,\mathrm{d} u, \qquad α>-1, \qquad θ>0,$$ where $$J_{a,b}(x)=\sum_{j=0}^\infty\frac{(-x)^j}{j!Γ(a+bj)},\qquad a\in\mathbb{C},\qquad b>-1,$$ is Wright's generalization of the Bessel function. This non-symmetric kernel, which generalizes the classical Bessel kernel (corresponding to $θ=1$) in random matrix theory, is the hard edge scaling limit of the correlation kernel for certain Muttalib-Borodin ensembles. We show that, if $θ$ is rational, i.e., $θ=\frac{m}{n}$ with $m,n\in\mathbb{N}$, $gcd(m,n)=1$, and $α> m-1-\frac{m}{n}$, the Wright's generalized Bessel kernel is integrable in the sense of Its-Izergin-Korepin-Slavnov. We then come to the Fredholm determinant of this kernel over the union of several scaled intervals, which can also be interpreted as the gap probability (the probability of finding no particles) on these intervals. The integrable structure allows us to obtain a system of coupled partial differential equations associated with the corresponding Fredholm determinant as well as a Hamiltonian interpretation. As a consequence, we are able to represent the gap probability over a single interval $(0,s)$ in terms of a solution of a system of nonlinear ordinary differential equations.
description: 25 pages, 1 figure. Title changed, size reduced, added numerics of gap probabilities and its small s asymptotics for general parameters, to appear in Physica D: Nonlinear Phenomena
The uncertainty of rain : anticipation, memory and meaning in images of objects and spaces
Creators: name: Swinn., Gabrielle
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.
Control theory in practice : stabilization of a self-balancing robot using LQR and SMC
Creators: name: Luitel, Rupak
Publisher: name: The University of Texas at Austin
Year: 2023
Subjects: Control system
LQR
SMC

description: Control theory plays an important role in the design and stability of dynamic systems. It is necessary to understand how control strategies must be implemented and how they are tuned and modified to make them work in an actual system. This report presents result in a short study on the design, implementation, and analysis of two distinct control methods—Linear Quadratic Regulator (LQR) and Sliding Mode Control (SMC)—for controlling the Minseg$^{TM}$ robot, a type of self-balancing robot commerically available from minseg.com. The design process involved modelling of the physical system to obtain equations of motion and state space equations, followed by designing LQR and SMC controllers, which were then implemented on the actual system using an Arduino platform. The results showed that the designed LQR controller had an average difference between consecutive convergence times of 0.27 s and an average consecutive tracking error of 0.0353 rad, while the SMC controller achieved an average difference between consecutive convergence times of 0.08 s and an average consecutive tracking error of 0.0169 rad. Although, the SMC controller showed faster convergence times and lower tracking error, the LQR control showed better overall stability and was able to balance the robot for more time than SMC. Overall, the motivation behind this report was to gain understanding of control design and to demonstrate how some practical aspects of control theory can be applied.
Community Health Educators and Maternal Health: Experimental Evidence from Northern Nigeria
Creators: name: Nyqvist, Martina BjÖrkman
name: Leight, Jessica
name: Sharma, Vandana
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: Science Policy

description: The slow pace of improvement in service delivery and health outcomes for pregnant women and newborns in developing countries has been a major concern for policy makers in recent decades. This paper presents the results from a randomized controlled trial of a community health worker program designed to enhance uptake of child and maternal health services in Northern Nigeria. Three interventions were evaluated: the deployment of community health educators, health educators with the provision of safe birth kits, and health educators with community dramas. The results suggest that the interventions increased utilization of antenatal, postnatal, and infant care. Maternal and newborn health practices improved as well as health knowledge. In addition, the community health worker program was more effective when supplemented with additional program components.
Magnetic catalysis and inverse magnetic catalysis in nonlocal chiral quark models
Creators: name: Pagura, V. P.
name: Dumm, D. Gomez
name: Noguera, S.
name: Scoccola, N. N.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the behavior of strongly interacting matter under an external constant magnetic field in the context of nonlocal chiral quark models within the mean field approximation. We find that at zero temperature the behavior of the quark condensates shows the expected magnetic catalysis effect, our predictions being in good quantitative agreement with lattice QCD results. On the other hand, in contrast to what happens in the standard local Nambu-Jona-Lasinio model, when the analysis is extended to the case of finite temperature our results show that nonlocal models naturally lead to the Inverse Magnetic Catalysis effect.
description: 14 pages, 3 figures. References added, Fig. 3 enlarged including new results. To be published in Physical Review D
The Role of Civil Service reform in Improving Public Service Delivery: the Case of Woreda 4(Alem Bank) Health Center, Kolfe Keranyo Sub- City, Addis Ababa City Administration-Ethiopia
Creators: name: Assefa, Gezae
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2017

description: The main purpose of this study was to assess the role of service delivery reform in improving health service delivery focusing on Woreda 4 Health Center in KolfeKeranyo Sub-City. To deal with the problems on service delivery, three fundamental research questions were formulated to evaluate the responsiveness, quality and timeliness of services that provided by the health center as a result of reform implementation in the public health sector as well as challenges encountered in the implementation of reform program in service delivery in woreda 4 health center. To conduct the study, mixed method study design was employed, and simple random and purposive sampling methods were used to select 272 service users and 10 health workers and officials of the health center and sub-city health office respectively. The main instruments of data collection were questionnaire, in-depth interview and document analysis. The data were analyzed using frequency tables and percentage. The finding of the study reveals that the majority of service user participants of the study have confirmed that they were satisfied by the health services provided by the woreda health center. This justifies that currently the contribution of the implementation of service delivery reform in health service institutions has had significant positive role in improving health service delivery. From the findings of the study it was possible to conclude that health service delivery is improving through the implementation of service delivery reform despite some challenges that needed to be addressed in order to achieve all the intended objectives of the reform program for the benefit of end users in public health service delivery. The need to develop and implement comprehensive grievance and complaints handling mechanisms including a need for sensitization of customers about their rights and privileges, and the need to adopt and implement reward systems are some of the recommendations forward in order to consistently improve better service delivery in all public institutions in general and in woreda 4 health center in particular
title: История европейской ментальности
Creators: name: ELS IPR BOOKS
Publisher: name: Ай Пи Ар Медиа
Year: 2021

description: В учебном пособии проблема ментальности рассматривается как историко-культурная и проективная. Она исследуется в трех важных аспектах: история философии, взятая в культурном контексте эпохи; анализ опорный: понятий социальных и гуманитарных дисциплин; перевод и непереводимость как особая форма мысли в культуре. Книга дает представление о направлениях современных исследований отечественных и зарубежных ученых, наследие которых помогает сохранить формообразующие, продуктивные элементы понимания мира. Учебное пособие предназначено для бакалавров и магистров, обучающихся по направлениям подготовки 41.03.01, 41.04.01 «Зарубежное регионоведение», 41.03.05, 41.04.05 «Международные отношения», изучающих дисциплину «История европейской ментальности», а также будет полезно культурологам, филологам и тем, кого интересуют проблемы ментальности и традиций в исторической перспективе.
A literature review of sensor technology in self-driving vehicles
Creators: name: Vollala, Saideep
Publisher: name: The University of Texas at Austin
Year: 2022
Subjects: Autonomous driving
Sensors
Literature review
LIDAR
Camera
Radar

description: This review aims to summarize the latest perception hardware technology for automated vehicles and provide recommendations to the University of Texas at Austin’s EcoCar EV Challenge. The challenge is an inter-collegiate competition that assesses the team’s ability to retrofit a car given by General Motors to perform automated driving tasks. The review looks at LIDARs, cameras, radars, and ultrasonic sensors and makes recommendations to the team such as the type of camera to use, the LIDAR field of view, and more.
On the bilinear covariants associated to mass dimension one spinors
Creators: name: da Silva, J. M. Hoff
name: Villalobos, C. H. Coronado
name: Rogerio, R. J. Bueno
name: Scatena, E.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we approach the issue of Clifford algebra basis deformation, allowing for bilinear covariants associated to Elko spinors which satisfy the Fierz-Pauli-Kofink identities. We present a complete analysis of covariance, taking into account the involved dual structure associated to Elko. Moreover, the possible generalizations to the recently presented new dual structure are performed.
description: 9 pages, 0 figures
An overview of desorption parameters of Volatile and Complex Organic Molecules: A systematic dig on experimental literature
Creators: name: Ligterink, N. F. W.
name: Minissale, M.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Many molecules observed in the interstellar medium are thought to result from thermal desorption of ices. Parameters such as desorption energy and pre-exponential frequency factor are essential to describe the desorption of molecules. Experimental determinations of these parameters are missing for many molecules, including those found in the interstellar medium. The objective of this work is to expand the number of molecules for which desorption parameters are available, by collecting and re-analysing experimental temperature programmed desorption data that are present in the literature. Transition State Theory (TST) is used in combination with the Redhead equation to determine desorption parameters. Experimental data and molecular constants (e.g., mass, moment of inertia) are collected and given as input. Using the Redhead-TST method, the desorption parameters for 133 molecules have been determined. The Redhead-TST method is found to provide reliable results that agree well with desorption parameters determined with more rigorous experimental methods. The importance of using accurately determined pre-exponential frequency factors to simulate desorption profiles is emphasised. The large amount of data allows to look for trends, the most important is the relationship log$_{10}$($ν$) = 2.65ln($m$) + 8.07, where $ν$ is the pre-exponential frequency factor and $m$ the mass of the molecule. The data collected in this work allow to model the thermal desorption of molecules and help understand changes in chemical and elemental composition of interstellar environments.
description: Accepted for Astronomy and Astrophysics
Photoluminescence and stability of perovskite-phase CsPbI₃ nanocrystals and development of nickel metal-organic decomposition inks
Creators: name: Abney, Michael Keith
name: 0000-0003-4155-2381
Publisher: name: The University of Texas at Austin
Year: 2022
Subjects: Perovskite
Nanocrystal
CsPbI₃
Optical
Photoluminescence
Nickel
Printed electronics
Ink

description: Lead halide perovskite nanocrystals (LHP NCs) exhibit interesting and exceptional optical properties such as near-unity photoluminescence (PL) quantum yield and narrow PL emission line widths. As a result, LHP NCs have demonstrated promising potential in an array of optoelectronic devices such as photovoltaics (PVs), light-emitting diodes (LEDs), optical detectors, and lasers. For CsPbI₃ NCs in particular, one of the major obstacles to their commercial success is structural instability of the perovskite phase, which must be managed. Here, a closer look is taken at the PL emission of CsPbI₃ NC films and how it is affected by light and environmental conditions. The thermal phase stability of CsPbI₃ and the impact of surface area and composition are also investigated. Light-induced changes in photophysical and electronic properties in LHPs can affect their performance in device applications. It is revealed that light excitation induces a slow, reversible enhancement in PL lifetime and intensity in films of perovskite-phase CsPbI₃ NCs. Placing the films under vacuum or nitrogen for several minutes was also found to increase the PL lifetime and intensity. A model of slow, humidity and light-sensitive surface states in CsPbI₃ NCs is proposed. Perovskite-phase CsPbI₃ nanocrystals convert to the optically inactive δ-phase at elevated temperature. Alloying with Br was found to improve the phase stability when the films were relatively thin. Films of mixed-halide CsPbI₂.₅Br₀.₅ nanocrystals less than 30 nm thick showed no conversion to the δ-phase even after 1 hour of heating at 250°C, while thicker films still reverted to the δ-phase after heating. These results show that compositional changes and film thickness can have a significant, cumulative effect on the stability of perovskite nanocrystal films. The role of surface area/energy in CsPbI₃ nanocrystal stability is discussed. CsPbI₃ NC-based solar cells were successfully fabricated. This inspired collaborative work on the development of printable, conductive metal-organic decomposition (MOD) inks, which could play a role in the contacts of perovskite PV for low-cost, flexible, and low-temperature applications. Early development and characterization of a screen-printable, air-curable Ni-based MOD ink is detailed. Current performance of this ink is limited by residual carbon contamination, which is a focus of further development.
Restraints Permitting the Largest Number of Colourings
Creators: name: Brown, Jason
name: Erey, Aysel
Publisher: name: arXiv
Year: 2016
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: A \textit{restraint} $r$ on $G$ is a function which assigns each vertex $v$ of $G$ a finite set of forbidden colours $r(v)$. A proper colouring $c$ of $G$ is said to be \textit{permitted by the restraint r} if $c(v)\notin r(v)$ for every vertex $v$ of $G$. A restraint $r$ on a graph $G$ with $n$ vertices is called a \textit{$k$-restraint} if $|r(v)|=k$ and $r(v) \subseteq \{1,2,\dots ,kn\}$ for every vertex $v$ of $G$. In this article we discuss the following problem: among all $k$-restraints $r$ on $G$, which restraints permit the largest number of $x$-colourings for all large enough $x$? We determine such extremal restraints for all bipartite graphs.
description: 21 pages, 2 figures