cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Dynamic modeling and advanced control of ground-based and space-based deployable manipulator systems
Creators: name: Cao, Yang
Publisher: name: University of British Columbia
Year: 2009

description: The thesis focuses on several key issues associated with modeling, analysis, and advanced control of a class of multi-module manipulator systems, which can vary their geometric configuration to quickly adapt to the environment and the requirements of a task. The studied manipulator system has a combination of revolute and prismatic joints, which lends itself to distinct advantages; for example, reduced dynamic coupling effects and singularities, simpler kinematics, and ease of obstacle avoidance , for a specific number of degrees of freedom. In rigorous and hazardous environments, autonomous operation is preferred. A reliable and effective control approach is essential to properly carry out a task (e.g., trajectory tracking in parts joining, inspection and material application; satellite capturing for retrieval and repair) in an autonomous manner. In the present work, several controllers have been formulated, analyzed, designed, simulated, and tested. Specifically, linear quadratic regulator (LQR), feedback linearization technique (FLT), computed torque adaptive control, and neural network adaptive control, have been studied. Most of them are model-based controllers. In view of this and for use of computer simulations related to illustration and evaluation of the techniques developed in the thesis, complete dynamic formulations of ground-based and space-based models of the robotic system are presented in the thesis. The resulting coupled and nonlinear models may be incomplete and may have uncertainties in parameters. The neural-network adaptive controller developed here is able to accommodate these shortcomings. Details of this controller are presented and the performance is evaluated using several case studies. The various control methods studied in the present research have distinct advantages and disadvantages, which make them perform satisfactorily under some conditions while deteriorating under some other conditions. As a result it is desirable to have a supervisory system to monitor the performance of the robotic system and then switch on an appropriate control scheme depending on the system behavior. When the system operates in different modes of operation or carries out several tasks, then, it would be possible to optimize its performance through controller switching. A new control scheme termed Supervisory Control Switching System (SCSS) has been developed and evaluated during the concluding stage of the present investigation. It is capable of selecting the most suitable controller for a particular task or a situation, from several separately designed controllers. The present study lays a sound foundation for further exploration of this class of novel and useful manipulators
Examining Students’ Perceptions of Globalization and Study Abroad Programs at HBCUs
Creators: name: Walker, Stevon
name: Bukenya, James O.
name: Thomas, Terrence
name: Walker, Stevon
name: Bukenya, James O.
name: Thomas, Terrence
Publisher: name: Unknown
Year: 2010
Subjects: subject: Agribusiness
subject: Agricultural and Food Policy
subject: International Development
subject: Research Methods/ Statistical Methods
subject: Globalization
subject: Study Abroad Programs
subject: Logistic Regression
subject: Factor Analysis
subject: Survey Data

description: The objective in this paper is to explore students’ perceptions of globalization and study abroad programs at Historically Black Colleges and Universities (HBCUs). Recent statistics reveal that in spite of the current growth in the number of US students receiving academic credit for their overseas academic experience, less than one percent of undergraduate minority students participate in a study abroad program during their degree program. The analysis is based on survey questionnaires administered to 263 undergraduate minority students at Alabama A&M University. The questionnaire contained questions related to respondents’ demographic characteristics and likert-scale questions pertaining to students’ perceptions of globalization and studying abroad programs. The data are analyzed using factor analysis and binary logistic regression. The results of the regression model suggest that while a number of variables such as major and classification are found to have statistically significant relationships towards globalization, demographic variables and information source variables are not good indicators of student perceptions of globalization. One interesting findings is that with a global mindset, business students seem to be more favorably inclined toward globalization than non-business students.
Young Massive Clusters in Non-Interacting Galaxies
Creators: name: Larsen, S. S.
name: Brodie, J. P.
name: Hunter, D. A.
name: Richtler, T.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Young star clusters with masses well in excess of 100.000 Msun have been observed not only in merger galaxies and large-scale starbursts, but also in fairly normal, undisturbed spiral and irregular galaxies. Here we present virial mass estimates for a sample of 7 such clusters and show that the derived mass-to-light ratios are consistent with "normal" Kroupa-type stellar mass distributions.
description: 4 pages, 1 figure, to appear in "Starbursts from 30 Doradus to Lyman Break Galaxies'', eds. R. de Grijs, R. M. Gonzalez Delgado
Dual polity, dual careers? The dynamic interaction of political careers and territorial order in the devolved United Kingdom
Creators: name: Stolz, Klaus
Publisher: name: Taylor & Francis
Year: 2024
Subjects: subject: Cell Biology
subject: Biotechnology
subject: Ecology
subject: FOS: Biological sciences
subject: Biological Sciences not elsewhere classified
subject: Science Policy
subject: Infectious Diseases
subject: FOS: Health sciences

description: A lack of inter-governmental relations has been seen as a serious challenge to the integrity of the UK after devolution. This article asks whether newly evolving multilevel political career patterns can make up for this deficit by providing new and meaningful institutional linkages between centre and periphery or whether they cement and expand the existent institutional schism? The empirical career analysis reveals patterns of alternative careers facilitating the emergence of distinct political classes at the centre and the peripheries. Career patterns and institutional structures are depicted as mutually reinforcing the dualistic character of British territorial politics and thus projecting the image of a divided rather than a united kingdom.
Topological inheritance in half-SSH Hubbard models
Creators: name: Mondal, Suman
name: Greschner, Sebastian
name: Santos, Luis
name: Mishra, Tapan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: The interplay between interparticle interactions and topological features may result in unusual phenomena. Interestingly, interactions may induce topological features in an originally trivial system, as we illustrate for the case of a one-dimensional two-component Hubbard model in which one component is subjected to Su-Schrieffer-Heeger(SSH) dimerization, whereas the other one is not. We show that due to inter-component interactions the topological properties of one component are induced in the originally trivial one. Although for large interactions topological inheritance may be readily explained by on-site pairing, we show that the threshold for full inheritance occurs at weak interactions, for which the components are not yet paired. We illustrate this inheritance by discussing both bulk and edge properties, as well as dynamical observables as mean chiral displacement and charge pumping.
description: 5 pages, 5 figures
The Impact of Agricultural Growth on Rural Non-Farm Incomes and Employment in Alabama
Creators: name: Brazil, LaTravis
name: Bukenya, James O.
name: Brazil, LaTravis
name: Bukenya, James O.
Publisher: name: Unknown
Year: 2010
Subjects: subject: Agribusiness
subject: Labor and Human Capital
subject: Research Methods/ Statistical Methods
subject: Rural-Urban Linkages
subject: Counties
subject: Multipliers
subject: Employment

description: The rural nonfarm economy is the backbone of the economy of numerous small towns scattered throughout the Black Belt region, as well as the primary source of income and employment. Seen in this light, the rural nonfarm economy will play a key role in determining future prospects for employment growth and poverty alleviation in the Alabama Black Belt region. The objective in this paper therefore is to examine the importance of rural-urban growth linkages with a focus on the Black Belt region and estimate agricultural growth multipliers. The analysis uses cross-section data to estimate econometrically the indirect rural employment and income generated by agricultural growth. Two major sections address the study objective. The first examines the importance, composition and location of nonfarm activity, as well as general trends over the past decades. After reviewing previous growth linkage studies, the second section explores the relationship between agriculture and changes in nonfarm activities.
Topological charge renormalization: A test case for 3-loop vacuum calculations using overlap fermions and Symanzik improved gluons
Creators: name: Skouroupathis, A.
name: Panagopoulos, H.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We calculate perturbative renormalization properties of the topological charge, using the standard lattice discretization given by a product of twisted plaquettes. We use the overlap and clover action for fermions, and the Symanzik improved gluon action for 4- and 6-link loops. We compute the multiplicative renormalization of the topological charge density to one loop; this involves only the gluon part of the action. The power divergent additive renormalization of the topological susceptibility is calculated to 3 loops.
description: 6 pages, 5 figures, poster presented at Lattice2005(renormalization and improvement), Dublin, July 25-30, 2005. A longer write-up may be found in hep-lat/0509012
Comparative study of nanoparticle uptake and impact in murine lung, liver and kidney tissue slices
Creators: name: Bartucci, Roberta
name: Abhimata Paramanandana
name: Ykelien L. Boersma
name: Olinga, Peter
name: Salvati, Anna
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biochemistry
subject: Space Science
subject: Medicine
subject: Cell Biology
subject: Pharmacology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Sociology
subject: FOS: Sociology
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences

description: To determine responses to nanoparticles in a more comprehensive way, current efforts in nanosafety aim at combining the analysis of multiple endpoints and comparing outcomes in different models. To this end, here we used tissue slices from mice as 3D ex vivo models and performed for the first time a comparative study of uptake and impact in liver, lung, and kidney slices exposed under the same conditions to silica, carboxylated and amino-modified polystyrene. In all organs, only exposure to amino-modified polystyrene induced toxicity, with stronger effects in kidneys and lungs. Uptake and distribution studies by confocal microscopy confirmed nanoparticle uptake in all slices, and, in line with what observed in vivo, preferential accumulation in the macrophages. However, uptake levels in kidneys were minimal, despite the strong impact observed when exposed to the amino-modified polystyrene. On the contrary, nanoparticle uptake and accumulation in macrophages were particularly evident in lung slices. Thus, tissue digestion was used to recover all cells from lung slices at different exposure times and to determine by flow cytometry detailed uptake kinetics in lung macrophages and all other cells, confirming higher uptake by the macrophages. Finally, the expression levels of a panel of targets involved in inflammation and macrophage polarization were measured to determine potential effects induced in lung and liver tissue. Overall, this comparative study allowed us to determine uptake and impact of nanoparticles in real tissue and identify important differences in outcomes in the organs in which nanoparticles distribute.
Residual Confinement in High-Temperature Yang-Mills Theory
Creators: name: Maas, Axel
name: Wambach, Jochen
name: Gruter, Burghard
name: Alkofer, Reinhard
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The infrared behavior of Landau gauge gluon and ghost propagators are investigated in Yang-Mills theory at non-vanishing temperatures. Self-consistent solutions are presented for temperatures below the presumed phase transition and in the infinite temperature limit. Gluon confinement is manifest in the infrared behavior of these propagators. As expected confinement prevails below the phase transition. In the infinite-temperature limit a qualitative change is observed: the chromoelectric sector exhibits a near-perturbative behavior while long-range chromomagnetic interactions, mediated by soft ghost modes, are still present. The latter behavior is in agreement with corresponding lattice results. It furthermore implies that part of the gluons are still confined.
description: 5 pages, 4 figures, poster presented by A.Maas at the Strong and Electroweak Matter 2004 Conference, Helsinki, Finland, 16th-19th June 2004; to appear in the proceedings
Household Food Security in the United States, 2007
Creators: name: Nord, Mark
name: Andrews, Margaret S.
name: Carlson, Steven
name: Nord, Mark
name: Andrews, Margaret S.
name: Carlson, Steven
Publisher: name: Unknown
Year: 2008
Subjects: subject: Agricultural and Food Policy
subject: Consumer/Household Economics
subject: Food Consumption/Nutrition/Food Safety
subject: Food Security and Poverty
subject: Food security
subject: food insecurity
subject: food spending
subject: food pantry
subject: soup kitchen
subject: emergency kitchen
subject: material well-being
subject: Food Stamp Program
subject: National School Lunch Program
subject: WIC

description: Eighty-nine percent of American households were food secure throughout the entire year in 2007, meaning that all household members had access at all times to enough food for an active, healthy life. The remaining households (11.1 percent) were food insecure at least some time during the year. About one-third of food-insecure households (4.1 percent of all U.S. households) had very low food security—meaning that the food intake of one or more adults was reduced and their eating patterns were disrupted at times during the year because the household lacked money and other resources for food. Prevalence rates of food insecurity and very low food security were essentially unchanged from those in 2005 and 2006. The typical food-secure household spent 35 percent more on food than the typical food-insecure household of the same size and household composition. Just over half of all food-insecure households participated in one or more of the three largest Federal food and nutrition assistance programs during the month prior to the survey.
Littorinimorpha Golikov & Starobogatov 1975
Creators: name: Zhang, - H.
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Mollusca
Gastropoda
Littorinimorpha

description: Order Littorinimorpha
Superfamily Truncatelloidea
Remarks. The superfamily Rissooidea was previously used to include Tateidae and related families, but Criscione & Ponder (2013) have shown that the Rissooidea and Truncatelloidea should be recognised as two separate superfamilies, with the former containing only a few marine families.
description: Published as part of Zhang, - H., 2019, New taxa of Tateidae (Caenogastropoda, Truncatelloidea) from springs associated with the Great Artesian Basin and Einasleigh Uplands, Queensland, with the description of two related taxa from eastern coastal drainages, pp. 1-67 in Zootaxa 4583 (1) on page 6, DOI: 10.11646/zootaxa.4583.1.1, http://zenodo.org/record/2637603
AVTOMOBILLAR DVIGATELI CHIQINDI GAZLAR SARFINI KAMAYTIRISH VA CHIQARISH QUVURI SAMARADORLIGINI OSHIRISH
Creators: name: Fayziyev, Javohir
Publisher: name: Zenodo
Year: 2024

description: Mazkur tezis avtomobillar dvigatellari tomonidan chiqariladigan chiqindi gazlar miqdorini kamaytirish hamda chiqarish quvurlarining samaradorligini oshirish masalalariga bag'ishlangan. Chiqindi gazlar avtomobil dvigatellari ekspluatatsiyasi davomida atrof-muhitga salbiy ta'sir ko'rsatib, ekologik muammolarning asosiy manbalaridan biri hisoblanadi. Shuning uchun ushbu tezisda, dvigatellarning chiqindi gazlarini kamaytirishga qaratilgan texnologik usullar va chiqarish quvurlarining ishlash samaradorligini oshirish bo‘yicha innovatsion yechimlar ko‘rib chiqilgan.
Prediction of speech intelligibility with DNN-based performance measures
Creators: name: Martinez, Angel Mario Castro
name: Spille, Constantin
name: Roßbach, Jana
name: Kollmeier, Birger
name: Meyer, Bernd T.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Sound (cs.SD)
subject: Artificial Intelligence (cs.AI)
subject: Computation and Language (cs.CL)
subject: Machine Learning (cs.LG)
subject: Audio and Speech Processing (eess.AS)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper presents a speech intelligibility model based on automatic speech recognition (ASR), combining phoneme probabilities from deep neural networks (DNN) and a performance measure that estimates the word error rate from these probabilities. This model does not require the clean speech reference nor the word labels during testing as the ASR decoding step, which finds the most likely sequence of words given phoneme posterior probabilities, is omitted. The model is evaluated via the root-mean-squared error between the predicted and observed speech reception thresholds from eight normal-hearing listeners. The recognition task consists of identifying noisy words from a German matrix sentence test. The speech material was mixed with eight noise maskers covering different modulation types, from speech-shaped stationary noise to a single-talker masker. The prediction performance is compared to five established models and an ASR-model using word labels. Two combinations of features and networks were tested. Both include temporal information either at the feature level (amplitude modulation filterbanks and a feed-forward network) or captured by the architecture (mel-spectrograms and a time-delay deep neural network, TDNN). The TDNN model is on par with the DNN while reducing the number of parameters by a factor of 37; this optimization allows parallel streams on dedicated hearing aid hardware as a forward-pass can be computed within the 10ms of each frame. The proposed model performs almost as well as the label-based model and produces more accurate predictions than the baseline models.
Financial Feasibility of Simultaneous Production of Pine Sawlogs, Forage, and Meat Goats on Small Farms in Alabama: A Preliminary Analysis
Creators: name: Broughton, Brandi
name: Bukenya, James O.
name: Broughton, Brandi
name: Bukenya, James O.
Publisher: name: Unknown
Year: 2010
Subjects: subject: Agribusiness
subject: Community/Rural/Urban Development
subject: Livestock Production/Industries
subject: Production Economics
subject: Productivity Analysis
subject: Research Methods/ Statistical Methods
subject: Silvopasture
subject: Financial Analysis
subject: Enterprise Budgets
subject: Cash Flow Analysis

description: Small and limited resource farmers and landowners in the Alabama Black Belt region face many challenges as they seek to make their farms and forestlands profitable, productive and environmentally sustainable. A host of problems—farmland conversion, urbanization pressures, reductions in water quality and availability, soil erosion, irregular cash flows, and increased government regulation—make managing family farms or forestland a difficult task. In response to these challenges, many farmers and landowners are considering agroforestry as an opportunity to increase land productivity and to improve their cash flows by combining income from agriculture, forestry, and animal production on the same piece of land. The objective in this paper was to conduct economic evaluations of agroforestry practices so that landowners, extension personnel, and other decision makers can correctly assess the potential of agroforestry practices among the many land-use options. The data analyzed were collected from a four year silvopastoral study conducted in the Black Belt region, on the property of the Federation of Southern Cooperatives in Epes, Alabama.
Structural and optical properties of silicon nanocrystals embedded in silicon carbide
Creators: name: Weiss, C.
name: Schnabel, M.
name: Reichert, A.
name: Löper, P.
name: Janz, S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The outstanding demonstration of quantum confinement in Si nanocrystals (Si NC) in a SiC matrix requires the fabrication of Si NC with a narrow size distribution. It is understood without controversy that this fabrication is a difficult exercise and that a multilayer (ML) structure is suitable for such fabrication only in a narrow parameter range. This parameter range is sought by varying both the stoichiometric SiC barrier thickness and the Si-rich SiC well thickness between 3 and 9 nm and comparing them to single layers (SL). The samples processed for this investigation were deposited by plasma-enhanced chemical vapor deposition (PECVD) and subsequently subjected to thermal annealing at 1000-1100$°$C for crystal formation. Bulk information about the entire sample area and depth were obtained by structural and optical characterization methods: information about the mean Si NC size was determined from grazing incidence X-ray diffraction (GIXRD) measurements. Fourier-transform infrared spectroscopy (FTIR) was applied to gain insight into the structure of the Si-C network, and spectrophotometry measurements were performed to investigate the absorption coefficient and to estimate the bandgap $E_{04}$. All measurements showed that the influence of the ML structure on the Si NC size, on the Si-C network and on the absorption properties is subordinate to the influence of the overall Si content in the samples, which we identified as the key parameter for the structural and optical properties. We attribute this behavior to interdiffusion of the barrier and well layers. Because the produced Si NC are within the target size range of 2-4 nm for all layer thickness variations, we propose to use the Si content to adjust the Si NC size in future experiments.
Precision Agriculture Technology Adoption for Cotton Production
Creators: name: Paxton, Kenneth W.
name: Mishra, Ashok K.
name: Chintawar, Sachin
name: Larson, James A.
name: Roberts, Roland K.
name: English, Burton C.
name: Lambert, Dayton M.
name: Marra, Michele C.
name: Larkin, Sherry L.
name: Reeves, Jeanne M.
name: Martin, Steven W.
name: Paxton, Kenneth W.
name: Mishra, Ashok K.
name: Chintawar, Sachin
name: Larson, James A.
name: Roberts, Roland K.
name: English, Burton C.
name: Lambert, Dayton M.
name: Marra, Michele C.
name: Larkin, Sherry L.
name: Reeves, Jeanne M.
name: Martin, Steven W.
Publisher: name: Unknown
Year: 2010
Subjects: subject: Agricultural and Food Policy
subject: Farm Management
subject: Labor and Human Capital
subject: Land Economics/Use
subject: Productivity Analysis
subject: Resource /Energy Economics and Policy
subject: precision technologies
subject: Poisson
subject: Negative Binomial
subject: count-data method
subject: GIS
subject: education
subject: cotton

description: Many studies on the adoption of precision technologies have generally used logit models to explain the adoption behavior of individuals. This study investigates factors affecting the number of specific types of precision agriculture technologies adopted by cotton farmers. Particular attention is given to the influence of spatial yield variability on the number of precision farming technologies adopted, using a Count data estimation procedure and farm-level data. Results indicate that farmers with more within-field yield variability adopted a larger number of precision agriculture technologies. Younger and better educated producers and the number of precision agriculture technologies were significantly correlated. Finally, farmers using computers for management decisions also adopted a larger number of precision agriculture technologies.
Kinetic Theory of Random Graphs
Creators: name: Ben-Naim, E.
name: Krapivsky, P. L.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Statistical properties of evolving random graphs are analyzed using kinetic theory. Treating the linking process dynamically, structural characteristics such as links, paths, cycles, and components are obtained analytically using the rate equation approach. Scaling laws for finite systems are derived using extreme statistics and scaling arguments.
description: 11 pages, short review
Magnonic band structure in vertical meander-shaped CoFeB thin films
Creators: name: Gubbiotti, Gianluca
name: Sadovnikov, Alexandr
name: Beginin, Evgeny
name: Nikitov, Sergey
name: Wan, Danny
name: Gupta, Anshul
name: Kundu, Shreya
name: Talmelli, Giacomo
name: Carpenter, Robert
name: Asselberghs, Inge
name: Radu, Iuliana P.
name: Adelmann, Christoph
name: Ciubotaru, Florin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The dispersion of spin waves in vertical meander-shaped CoFeB thin films consisting of segments located at 90° angles with respect to each other is investigated by Brillouin light scattering spectroscopy. We reveal the periodic character of several dispersive branches as well as alternating frequency ranges where spin waves are allowed or forbidden to propagate. Noteworthy is the presence of the frequency band gaps between each couple of successive modes only for wave numbers k=n$π$/a, where n is an even integer number and a is the size of the meander unit cell, whereas the spectra show propagating modes in the orthogonal film segments for the other wavenumbers. The micromagnetic simulations and analytical calculations allow us to understand and explain the results in terms of the mode spatial localization and symmetry. The obtained results demonstrate the wave propagation in three dimensions opening the path for multi-level magnonic architectures for signal processing.
description: 19 pages, 6 figures. This work has received funding from the European Union's Horizon 2020 research and innovation program under grant agreement No 801055 "Spin Wave Computing for Ultimately-Scaled Hybrid Low-Power Electronics" - "CHIRON"
Tateidae Thiele 1925
Creators: name: Zhang, - H.
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Mollusca
Gastropoda
Littorinimorpha
Tateidae

description: Family Tateidae
Remarks. The family name Hydrobiidae was used for the Australasian species that have been shown to form a distinct clade, Tateidae, which is separate from the true hydrobiids (Ponder et al. 2008; Wilke et al. 2013).
Tateid freshwater snails have radiated extensively in parts of Australia, including Tasmania and southeastern mainland Australia (e.g., Ponder et al. 1993; Clark et al. 2003), and in the artesian springs associated with the Great Artesian Basin in South Australia (Ponder et al. 1989, 1995, 1996; Colgan et al. 2006) and Queensland (Ponder & Clark 1990; Perez et al. 2005). They are also known from New Zealand (Climo 1974, 1977; Haase 2008), Papua New Guinea (Bernasconi 1995), New Caledonia (Starmühlner 1970; Haase & Bouchet 1998), Lord Howe Island (Ponder 1982) and some other Pacific islands (e.g., Haase et al. 2005, 2006; Zielske & Haase 2014; Zielske et al. 2017), Sulawesi (Ponder & Haase 2005; Haase & Bouchet 2006; Zielske et al. 2011) and South America (e.g., Pilsbry 1911; Bichuette & Trajano 2003).
Ponder & Clark (1990) used the genus Jardinella Iredale & Whitley, 1938 based on a north-east Queensland riverine species, for 12 new species of ‘hydrobiids’ from artesian springs in western Queensland. A molecular study by Perez et al. (2005) showed that these species form several distinct groups that correspond with the spring supergroups. We have expanded on that study and have interpreted these geographic groups as distinct genera, as detailed below in this section and in Molecular results.
description: Published as part of Zhang, - H., 2019, New taxa of Tateidae (Caenogastropoda, Truncatelloidea) from springs associated with the Great Artesian Basin and Einasleigh Uplands, Queensland, with the description of two related taxa from eastern coastal drainages, pp. 1-67 in Zootaxa 4583 (1) on page 7, DOI: 10.11646/zootaxa.4583.1.1, http://zenodo.org/record/2637603
Interfacial crystal Hall effect reversible by ferroelectric polarization
Creators: name: Shao, Ding-Fu
name: Ding, Jun
name: Gurung, Gautam
name: Zhang, Shu-Hui
name: Tsymbal, Evgeny Y.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The control of spin-dependent properties by voltage, not involving magnetization switching, has significant advantages for low-power spintronics. Here, we predict that the interfacial crystal Hall effect (ICHE) can serve for this purpose. We show that the ICHE can occur in heterostructures composed of compensated antiferromagnetic metals and non-magnetic insulators due to reduced symmetry at the interface, and it can be made reversible if the antiferromagnet is layered symmetrically between two identical ferroelectric layers. We explicitly demonstrate this phenomenon using density functional theory calculations for three material systems: MnBi$_{2}$Te$_{4}$/GeI$_{2}$ and topological In$_{2}$Te$_{3}$/MnBi$_{2}$Te$_{4}$/In$_{2}$Te$_{3}$ van der Waals heterostructures, and GeTe/Ru$_{2}$MnGe/GeTe heterostructure composed of three-dimensional materials. We show that all three systems reveal a sizable ICHE, while the latter two exhibit a quantum ICHE and ICHE, respectively, reversible with ferroelectric polarization. Our proposal opens an alternative direction for voltage controlled spintronics and offers not yet explored possibilities for functional devices by heterostructure design.
Response to Out of Stock Produce and its Underlying Economic Considerations
Creators: name: Penn, Jerrod
name: Matopoulos, Aristides
name: House, Lisa
name: Penn, Jerrod
name: Matopoulos, Aristides
name: House, Lisa
Publisher: name: Unknown
Year: 2010
Subjects: subject: Agribusiness
subject: Out-of-stock
subject: grocery
subject: perishables
subject: opportunity cost
subject: transaction costs

description: The goal of this research is to investigate consumer response to out-of-stock product in the produce category. We do this by comparing results from a survey conducted in Greece and the United States to previous research on consumer response to out-of-stock situations for other perishable and non-perishable products. We further examined the underlying economic reasoning as well as the cultural and physical differences between the United States and Greece as explanations of different reactions. Out of Stock produce response proved different in produce than in other perishables and non-perishables. There is some evidence that produce does follow previous the suggested economic reasoning from the previous research, especially within transaction costs. Finally, the respondent’s country proved very significant in dictating response.
Effects of Thermal Fluctuations in the SPOrt Experiment
Creators: name: Carretti, E.
name: Zannoni, M.
name: Macculi, C.
name: Cortiglioni, S.
name: Sbarra, C.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The role of systematic errors induced by thermal fluctuations is analyzed for the SPOrt experiment with the aim at estimating their impact on the measurement of the Cosmic Microwave Background Polarization (CMBP). The transfer functions of the antenna devices from temperature to data fluctuations are computed, by writing them in terms of both instrument and thermal environment parameters. In addition, the corresponding contamination maps are estimated, along with their polarized power spectra, for different behaviours of the instabilities. The result is that thermal effects are at a negligible level even for fluctuations correlated with the Sun illumination provided their frequency $f_{tf}$ is larger than that of the Sun illumination ($f_{day}$) by a factor $f_{tf} / f_{day} > 30$, which defines a requirement for the statistical properties of the temperature behaviour as well. The analysis with actual SPOrt operative parameters shows that the instrument is only weakly sensitive to temperature instabilities, the main contribution coming from the cryogenic stage. The contamination on the E-mode spectrum does not significantly pollute the CMBP signal and no specific data cleaning seems to be needed.
description: 12 pages, 11 figures. Accepted for publication in A&A
Dynamical cloud formation traced by atomic and molecular gas
Creators: name: Beuther, H.
name: Wang, Y.
name: Soler, J. D.
name: Linz, H.
name: Henshaw, J.
name: Vazquez-Semadeni, E.
name: Gomez, G.
name: Ragan, S.
name: Henning, Th.
name: Glover, S. C. O.
name: Lee, M. -Y.
name: Guesten, R.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Context: Atomic and molecular cloud formation is a dynamical process. However, kinematic signatures of these processes are still observationally poorly constrained. Methods: Targeting the cloud-scale environment of the prototypical infrared dark cloud G28.3, we employ spectral line imaging observations of the two atomic lines HI and [CI] as well as molecular lines observations in 13CO in the 1--0 and 3--2 transitions. The analysis comprises investigations of the kinematic properties of the different tracers, estimates of the mass flow rates, velocity structure functions, a Histogram of Oriented Gradients (HOG) study as well as comparisons to simulations. Results: The central IRDC is embedded in a more diffuse envelope of cold neutral medium (CNM) traced by HI self-absorption (HISA) and molecular gas. The spectral line data as well as the HOG and structure function analysis indicate a possible kinematic decoupling of the HI from the other gas compounds. Spectral analysis and position-velocity diagrams reveal two velocity components that converge at the position of the IRDC. Estimated mass flow rates appear rather constant from the cloud edge toward the center. The velocity structure function analysis is consistent with gas flows being dominated by the formation of hierarchical structures. Conclusions: The observations and analysis are consistent with a picture where the IRDC G28 is formed at the center of two converging gas flows. While the approximately constant mass flow rates are consistent with a self-similar, gravitationally driven collapse of the cloud, external compression by, e.g., spiral arm shocks or supernovae explosions cannot be excluded yet. Future investigations should aim at differentiating the origin of such converging gas flows.
description: 13 pages, 15 figures, Astronomy & Astrophysics in press, a higher resolution version can be found at http://www.mpia.de/homes/beuther/papers.html
A Comparison of Household Food Security in Canada and the United States
Creators: name: Nord, Mark
name: Hopwood, Heather
name: Nord, Mark
name: Hopwood, Heather
Publisher: name: Unknown
Year: 2008
Subjects: Agricultural and Food Policy
Food Consumption/Nutrition/Food Safety
Food Security and Poverty
Health Economics and Policy
Institutional and Behavioral Economics
International Development

description: Food security—consistent access to enough food for an active, healthy life—is essential for health and good nutrition. The extent to which a nation’s population achieves food security is an indication of its material and social well-being. Differences in the prevalence of household level food insecurity between Canada and the United States are described at the national level and for selected economic and demographic subpopulations. Associations of food security with economic and demographic characteristics are examined in multivariate analyses that hold other characteristics constant. Comparable measures of household food security were calculated from the nationally representative Canadian Community Health Survey Cycle 2.2 (2004) and the U.S. Current Population Survey Food Security Supplement (2003-05). Based on the standard U.S. methodology, the percentage of the population living in households classified as food insecure was lower in Canada (7.0 percent) than in the United States (12.6 percent). The difference was greater for the percentage of children living in food-insecure households (8.3 percent vs. 17.9 percent) than for adults (6.6 percent vs. 10.8 percent). These differences primarily refl ected different prevalence rates of food insecurity for Canadian and U.S. households with similar demographic and economic characteristics. Differences in population composition on measured economic and demographic characteristics account for only about 15 to 30 percent of the overall Canada-U.S. difference.
The Effect of Class Imbalance on Precision-Recall Curves
Creators: name: Williams, Christopher K I
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: In this note I study how the precision of a classifier depends on the ratio $r$ of positive to negative cases in the test set, as well as the classifier's true and false positive rates. This relationship allows prediction of how the precision-recall curve will change with $r$, which seems not to be well known. It also allows prediction of how $F_β$ and the Precision Gain and Recall Gain measures of Flach and Kull (2015) vary with $r$.
description: 4 pages, 1 figure. Added ref to Siblini et al (2020) and last sentence. Final m/s version of paper published in Neural Computation
Spectroscopy of High-Redshift Supernovae from the ESSENCE Project: The First Two Years
Creators: name: Matheson, T.
name: Blondin, S.
name: Foley, R. J.
name: Chornock, R.
name: Filippenko, A. V.
name: Leibundgut, B.
name: Smith, R. C.
name: Sollerman, J.
name: Spyromilio, J.
name: Kirshner, R. P.
name: Clocchiatti, A.
name: Aguilera, C.
name: Barris, B.
name: Becker, A. C.
name: Challis, P.
name: Covarrubias, R.
name: Garnavich, P.
name: Hicken, M.
name: Jha, S.
name: Krisciunas, K.
name: Li, W.
name: Miceli, A.
name: Miknaitis, G.
name: Prieto, J. L.
name: Rest, A.
name: Riess, A. G.
name: Salvo, M. E.
name: Schmidt, B. P.
name: Stubbs, C. W.
name: Suntzeff, N. B.
name: Tonry, J. L.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the results of spectroscopic observations of targets discovered during the first two years of the ESSENCE project. The goal of ESSENCE is to use a sample of ~200 Type Ia supernovae (SNe Ia) at moderate redshifts (0.2 < z < 0.8) to place constraints on the equation of state of the Universe. Spectroscopy not only provides the redshifts of the objects, but also confirms that some of the discoveries are indeed SNe Ia. This confirmation is critical to the project, as techniques developed to determine luminosity distances to SNe Ia depend upon the knowledge that the objects at high redshift are the same as the ones at low redshift. We describe the methods of target selection and prioritization, the telescopes and detectors, and the software used to identify objects. The redshifts deduced from spectral matching of high-redshift SNe Ia with low-redshift SNe Ia are consistent with those determined from host-galaxy spectra. We show that the high-redshift SNe Ia match well with low-redshift templates. We include all spectra obtained by the ESSENCE project, including 52 SNe Ia, 5 core-collapse SNe, 12 active galactic nuclei, 19 galaxies, 4 possibly variable stars, and 16 objects with uncertain identifications.
description: 38 pages, 9 figures (many with multiple parts), submitted to AJ
Active Visuo-Haptic Object Shape Completion
Creators: name: Rustler, Lukas
name: Lundell, Jens
name: Behrens, Jan Kristof
name: Kyrki, Ville
name: Hoffmann, Matej
Publisher: name: arXiv
Year: 2022
Subjects: subject: Robotics (cs.RO)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Recent advancements in object shape completion have enabled impressive object reconstructions using only visual input. However, due to self-occlusion, the reconstructions have high uncertainty in the occluded object parts, which negatively impacts the performance of downstream robotic tasks such as grasping. In this work, we propose an active visuo-haptic shape completion method called Act-VH that actively computes where to touch the objects based on the reconstruction uncertainty. Act-VH reconstructs objects from point clouds and calculates the reconstruction uncertainty using IGR, a recent state-of-the-art implicit surface deep neural network. We experimentally evaluate the reconstruction accuracy of Act-VH against five baselines in simulation and in the real world. We also propose a new simulation environment for this purpose. The results show that Act-VH outperforms all baselines and that an uncertainty-driven haptic exploration policy leads to higher reconstruction accuracy than a random policy and a policy driven by Gaussian Process Implicit Surfaces. As a final experiment, we evaluate Act-VH and the best reconstruction baseline on grasping 10 novel objects. The results show that Act-VH reaches a significantly higher grasp success rate than the baseline on all objects. Together, this work opens up the door for using active visuo-haptic shape completion in more complex cluttered scenes.
description: 8 pages, 7 figures
Combustion modeling with conditional source-term estimation and laminar flamelet decomposition
Creators: name: Grout, Ray W. S.
Publisher: name: University of British Columbia
Year: 2009

description: Conditional source-term estimation with laminar flamelet decomposition has been utilized to model the mean chemical source term in a predictive RANS simulation of two different problems. With this model, integral equations relating the unconditional mean temperature and species fields to the conditional means are used to determine the flame structure as a combination of basis functions formed from solutions to the unsteady laminar flamelet equations. In the simulation of the Sandia Flame 'D', a well studied co-flowing piloted jet flame with a steady average solution, a converged solution was obtained which captured the trends in the temperature and major species, although the nitric oxide prediction overestimated the peak concentration by a substantial margin. Simulation of the autoignition process of non-premixed methane produced simulation predictions in excellent agreement with the experimental data. Using a new, more stringent, criteria to define ignition than earlier studies, the effect of ambient temperature on the ignition delay was captured, as was the expected physical behaviour prior to ignition. The errors in the simulation of the co-flowing piloted jet can be attributed to a large degree to the lack of ability of the basis functions used to account for the effect of the pilot flame. That the autoignition simulation was much more successful highlights the importance of including all relevant physics in the library of basis functions. Earlier formulations of the model were extended by expanding the sample space for the basis functions to include a wide variety of solutions to the laminar flamelet equations; in order to distinguish between the larger set, a new method of stabilizing the numerics was found to be necessary and the number of scalars used to determine the flame structure was increased. The formulation is easily extensible to libraries of basis functions which are capable of including effects such as pilot and edge flames not captured by the laminar flamelet solutions.
Exploring Longitudinal Effects of Session-based Recommendations
Creators: name: Ferraro, Andres
name: Jannach, Dietmar
name: Serra, Xavier
Publisher: name: arXiv
Year: 2020
Subjects: subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: Session-based recommendation is a problem setting where the task of a recommender system is to make suitable item suggestions based only on a few observed user interactions in an ongoing session. The lack of long-term preference information about individual users in such settings usually results in a limited level of personalization, where a small set of popular items may be recommended to many users. This repeated exposure of such a subset of the items through the recommendations may in turn lead to a reinforcement effect over time, and to a system which is not able to help users discover new content anymore to the desirable extent. In this work, we investigate such potential longitudinal effects of session-based recommendations in a simulation-based approach. Specifically, we analyze to what extent algorithms of different types may lead to concentration effects over time. Our experiments in the music domain reveal that all investigated algorithms---both neural and heuristic ones---may lead to lower item coverage and to a higher concentration on a subset of the items. Additional simulation experiments however also indicate that relatively simple re-ranking strategies, e.g., by avoiding too many repeated recommendations in the music domain, may help to deal with this problem.
description: The 14th ACM Conference on Recommender Systems
A Class of Three-Qubit Contextual Configurations Located in Fano Pentads
Creators: name: Saniga, Metod
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Combinatorics (math.CO)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Given the symplectic polar space of type $W(5,2)$, let us call a set of five Fano planes sharing pairwise a single point a Fano pentad. Once 63 points of $W(5,2)$ are appropriately labeled by 63 non-trivial three-qubit observables, any such Fano pentad gives rise to a quantum contextual set known as Mermin pentagram. Here, it is shown that a Fano pentad also hosts another, closely related contextual set, which features 25 observables and 30 three-element contexts. Out of 25 observables, ten are such that each of them is on six contexts, while each of the remaining 15 observables belongs to two contexts only. Making use of the recent classification of Mermin pentagrams (Saniga et al., Symmetry 12 (2020) 534), it was found that 12,096 such contextual sets comprise 47 distinct types, falling into eight families according to the number ($3, 5, 7, \ldots, 17$) of negative contexts.
description: 6 pages, one figure