cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Strongly lensed supernovae as a self-sufficient probe of the distance duality relation
Creators: name: Renzi, Fabrizio
name: Hogg, Natalie B.
name: Martinelli, Matteo
name: Nesseris, Savvas
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The observation of strongly lensed Type Ia supernovae enables both the luminosity and angular diameter distance to a source to be measured simultaneously using a single observation. This feature can be used to measure the distance duality parameter $η(z)$ without relying on multiple datasets and cosmological assumptions to reconstruct the relation between angular and luminosity distances. In this paper, we show how this can be achieved by future observations of strongly lensed Type Ia systems. Using simulated datasets, we reconstruct the function $η(z)$ using both parametric and non-parametric approaches, focusing on Genetic Algorithms and Gaussian processes for the latter. In the parametric approach, we find that in the realistic scenario of $N_{\rm lens}=20$ observed systems, the parameter $ε_0$ used to describe the trend of $η(z)$ can be constrained with the precision achieved by current SNIa and BAO surveys, while in the futuristic case ($N_{\rm lens}=1000$) these observations could be competitive with the forecast precision of upcoming LSS and SN surveys. Using the machine learning approaches of Genetic Algorithms and Gaussian processes, we find that both reconstruction methods are generally well able to correctly recover the underlying fiducial model in the mock data, even in the realistic case of $N_{\rm lens}=20$. Both approaches learn effectively from the features of the mock data points, yielding $1σ$ constraints that are in excellent agreement with the parameterised results.
description: 15pages, 8 figures. Edited to match PDU published version
Elastic lines on splayed columnar defects studied numerically
Creators: name: Petaja, Viljo
name: Sarjala, Matti
name: Alava, Mikko
name: Rieger, Heiko
Publisher: name: arXiv
Year: 2005
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We investigate by exact optimization method properties of two- and three-dimensional systems of elastic lines in presence of splayed columnar disorder. The ground state of many lines is separable both in 2d and 3d leading to a random walk -like roughening in 2d and ballistic behavior in 3d. Furthermore, we find that in the case of pure splayed columnar disorder in contrast to point disorder there is no entanglement transition in 3d. Entanglement can be triggered by perturbing the pure splay system with point defects.
description: 9 pages, 11 figures. Accepted for publication in PRB
FOOD SAFETY RISK PERCEPTION GAP BETWEEN CONSUMERS AND PROCESSORS OF SPECIALTY MEAT
Creators: name: Nganje, William E.
name: Taban, Thomas
name: Nganje, William E.
name: Taban, Thomas
Publisher: name: Unknown
Year: 2003
Subjects: Food Consumption/Nutrition/Food Safety

description: Consumers and processors of specialty meats continue to have different perceptions of food safety risk. This creates difficulties in formulating policy initiatives aimed at resolving these issues to enable marketing of specialty meats to move beyond niche markets. This study analyzes the risk perception gap, and provides an insight into methods by which perception issues can be resolved.
SURVIVING THE FIRST YEAR IN EXTENSION AGRIBUSINESS: WHAT AGRICULTURAL ECONOMICS PH.D.S DON'T PREPARE US FOR
Creators: name: Mark, Darrell R.
name: Mark, Darrell R.
Publisher: name: Unknown
Year: 2003
Subjects: Teaching/Communication/Extension/Profession
Agribusiness

description: The objective of this paper is to contribute to an increasingly important dialogue about the differences between agricultural economics and agribusiness and how graduate degrees in agricultural economics prepare faculty for agribusiness positions. The paper focuses on the need for applied agribusiness management training in agricultural economics graduate programs, the challenges that new faculty with agribusiness extension appointments face, and balancing extension, research, and teaching responsibilities. Suggestions are offered for providing formal training in extension/outreach functions during graduate school through coursework or apprenticeships. The opportunities and difficulties associated with building a new agribusiness extension program are also discussed.
Derived categories of sheaves on singular schemes with an application to reconstruction
Creators: name: Ballard, Matthew Robert
Publisher: name: arXiv
Year: 2008
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: We prove that the bounded derived category of coherent sheaves with proper support is equivalent to the category of locally-finite, cohomological functors on the perfect derived category of a quasi-projective scheme over a field. We introduce the notions of pseudo-adjoints and Rouquier functors and study them. As an application of these ideas and results, we extend the reconstruction result of Bondal and Orlov to Gorenstein projective varieties.
description: 23 pages. Final version although comments and suggestions are always welcome
Extraction of the specific shear viscosity of quark-gluon plasma from two-particle transverse momentum correlations
Creators: name: Gonzalez, Victor
name: Basu, Sumit
name: de Guevara, Pedro Ladron
name: Marin, Ana
name: Pan, Jinjin
name: Pruneau, Claude A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The specific shear viscosity, $η/s$, of the quark-gluon plasma formed in ultrarelativistic heavy-ion collisions at RHIC and LHC is estimated based on the progressive longitudinal broadening of transverse momentum two-particle correlators, $G_2$, reported as a function of collision centrality by the STAR and ALICE experiments. Estimates are computed as a function of collision centrality using the Gavin ansatz which relates the $G_2$ longitudinal broadening to the specific shear viscosity. Freeze out times required for the use of the ansatz are computed using a linear fit of freeze out times reported as a function of the cubic root of the charged particle pseudorapidity density $({\rm d}N_{\rm ch}/{\rm d}η)^{1/3}$. Estimates of $η/s$ based on ALICE data exhibit little to no dependence on collision centrality at LHC energy, while estimates obtained from STAR data hint that $η/s$ might be a function of collision centrality at top RHIC energy.
description: 4 figures, 7 pages
High dimensional random Apollonian networks
Creators: name: Zhang, Zhongzhi
name: Rong, Lili
name: Comellas, Francesc
Publisher: name: arXiv
Year: 2005
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We propose a simple algorithm which produces a new category of networks, high dimensional random Apollonian networks, with small-world and scale-free characteristics. We derive analytical expressions for their degree distributions and clustering coefficients which are determined by the dimension of the network. The values obtained for these parameters are in good agreement with simulation results and comparable to those coming from real networks. We prove also analitically that the average path length of the networks increases at most logarithmically with the number of vertices.
CHANGING CONSUMER PERCEPTIONS ABOUT GENETICALLY MODIFIED FOODS
Creators: name: Wachenheim, Cheryl J.
name: Wachenheim, Cheryl J.
Publisher: name: Unknown
Year: 2003
Subjects: Financial Economics
Research and Development/Tech Change/Emerging Technologies

description: University students took part in an experimental auction designed to elicit and estimate the influence of information bias on consumer willingness to pay for GM versus non-GM food products. Surveys before and after the auction queried participants on their perceptions about GM foods and the associated risks, and their beliefs and attitudes about the interaction between farming practices and the environment. Students received either positive- or negative-biased information about the impact of biotechnology on the environment during the auction. Consumer perceptions were influenced by information bias.
Effect of disorder on topological charge pumping in the Rice-Mele model
Creators: name: Hayward, A. L. C.
name: Bertok, E.
name: Schneider, U.
name: Heidrich-Meisner, F.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Recent experiments with ultracold quantum gases have successfully realized integer-quantized topological charge pumping in optical lattices. Motivated by this progress, we study the effects of static disorder on topological Thouless charge pumping. We focus on the half-filled Rice-Mele model of free spinless fermions and consider random diagonal disorder. In the instantaneous basis, we compute the polarization, the entanglement spectrum, and the local Chern marker. As a first main result, we conclude that the space-integrated local Chern marker is best suited for a quantitative determination of topological transitions in a disordered system. In the time-dependent simulations, we use the time-integrated current to obtain the pumped charge in slowly periodically driven systems. As a second main result, we observe and characterize a disorder-driven breakdown of the quantized charge pump. There is an excellent agreement between the static and the time-dependent ways of computing the pumped charge. The topological transition occurs well in the regime where all states are localized on the given system sizes and is therefore not tied to a delocalization-localization transition of Hamiltonian eigenstates. For individual disorder realizations, the breakdown of the quantized pumping occurs for parameters where the spectral bulk gap inherited from the band gap of the clean system closes, leading to a globally gapless spectrum. As a third main result and with respect to the analysis of finite-size systems, we show that the disorder average of the bulk gap severely overestimates the stability of quantized pumping. A much better estimate is the typical value of the distribution of energy gaps, also called mode of the distribution.
description: 14 pages, 15 figures. Revised version essentially as published. Additional references, updated figures and extended discussions. Data partially available as ancillary files
EFFICACY OF ELECTRON BEAM IRRADIATION OF PROCESSED PORK PRODUCTS
Creators: name: Cardona, Fredy A.
name: O'Rourke, Patrick D.
name: Wiegand, Bryon R.
name: O'Rourke, David L.
name: Cardona, Fredy A.
name: O'Rourke, Patrick D.
name: Wiegand, Bryon R.
name: O'Rourke, David L.
Publisher: name: Unknown
Year: 2003
Subjects: Food Consumption/Nutrition/Food Safety

description: The research reported on in this paper was conducted as part of a larger project. That project is on-going and is focused on ascertaining if irradiation of processed meats would be effective and economical. It involved the examination, through modeling, of the irradiation of one of many currently produced ready-to-eat (RTE) convenience-oriented, value-added pork products, sliced boneless ham. The results and findings reported in this paper represent the initial estimates of the cost and potential profitability or economic viability of irradiation of processed meats. The results and findings in this paper should be considered preliminary with extension and verification to be reported in a later paper by the authors. The objective of the portion of that project reported on in this paper was to conduct cost analysis of alternative irradiation methods and to ascertain the cost of each of those methods. Three scenarios were considered for cost analysis. The first scenario was the installation of an X-ray irradiator at an existing meat processing plant. The second scenario was the installation of a Cobalt-60 irradiator at an existing meat processing plant. The third scenario assumed that the meat processor contracted for irradiation services from an off-site company providing such service to a number of clients. For purposes of this study it was assumed that irradiation of sliced boneless ham would result in either a $.06/pound reduction in costs from processor to consumer, a $.06/pound increase in willingness to pay [price] or an equivalent combination of reduced costs and increased price. Total cost per pound for the irradiation process applied to sliced boneless ham ranged from $0.008, at the 200 million pound annual throughput rate using Cobalt-60 irradiation, to $0.069 at the 50 million pound annual throughput rate when contracting with an off-site company.
Session-aware Recommendation: A Surprising Quest for the State-of-the-art
Creators: name: Latifi, Sara
name: Mauro, Noemi
name: Jannach, Dietmar
Publisher: name: arXiv
Year: 2020
Subjects: subject: Information Retrieval (cs.IR)
subject: Machine Learning (cs.LG)
subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences

description: Recommender systems are designed to help users in situations of information overload. In recent years, we observed increased interest in session-based recommendation scenarios, where the problem is to make item suggestions to users based only on interactions observed in an ongoing session. However, in cases where interactions from previous user sessions are available, the recommendations can be personalized according to the users' long-term preferences, a process called session-aware recommendation. Today, research in this area is scattered and many existing works only compare session-aware with session-based models. This makes it challenging to understand what represents the state-of-the-art. To close this research gap, we benchmarked recent session-aware algorithms against each other and against a number of session-based recommendation algorithms and trivial extensions thereof. Our comparison, to some surprise, revealed that (i) item simple techniques based on nearest neighbors consistently outperform recent neural techniques and that (ii) session-aware models were mostly not better than approaches that do not use long-term preference information. Our work therefore not only points to potential methodological issues where new methods are compared to weak baselines, but also indicates that there remains a huge potential for more sophisticated session-aware recommendation algorithms.
Enhancing searches for resonances with machine learning and moment decomposition
Creators: name: Kitouni, Ouail
name: Nachman, Benjamin
name: Weisser, Constantin
name: Williams, Mike
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: A key challenge in searches for resonant new physics is that classifiers trained to enhance potential signals must not induce localized structures. Such structures could result in a false signal when the background is estimated from data using sideband methods. A variety of techniques have been developed to construct classifiers which are independent from the resonant feature (often a mass). Such strategies are sufficient to avoid localized structures, but are not necessary. We develop a new set of tools using a novel moment loss function (Moment Decomposition or MoDe) which relax the assumption of independence without creating structures in the background. By allowing classifiers to be more flexible, we enhance the sensitivity to new physics without compromising the fidelity of the background estimation.
description: 22 pages, 9 figures; final published version, added affiliations, appended acknowledgments
Meta-analysis of genome-wide association studies of hoarding symptoms in 27,651 individuals
Creators: name: Schachar, Russell J.
name: Boomsma, Dorret I.
name: Rück, Christian
name: Burton, Christie L.
name: Mattheisen, Manuel
name: Crosbie, Jennifer
name: Magnusson, Patrik
name: Crowley, James J.
name: Cath, Danielle
name: Iyegbe, Conrad
name: Ivanov, Volen Z.
name: Lemire, Mathieu
name: Larsson, Henrik
name: Pool, René
name: Silzer, Talisa
name: Hottenga, Jouke-Jan
name: Arnold, Paul D.
name: Smit, Dirk J. A.
name: Wu, Hei Man
name: Strom, Nora I.
name: Mataix-Cols, David
name: Lichtenstein, Paul
name: Meier, Sandra M.
Publisher: name: Springer Nature
Year: 2022

description:
Hoarding Disorder (HD) is a mental disorder characterized by persistent difficulties discarding or parting with possessions, often resulting in cluttered living spaces, distress, and impairment. Its etiology is largely unknown, but twin studies suggest that it is moderately heritable. In this study, we pooled phenotypic and genomic data from seven international cohorts (N = 27,651 individuals) and conducted a genome wide association study (GWAS) meta-analysis of parent- or self-reported hoarding symptoms (HS). We followed up the results with gene-based and gene-set analyses, as well as leave-one-out HS polygenic risk score (PRS) analyses. To examine a possible genetic association between hoarding symptoms and other phenotypes we conducted cross-trait PRS analyses. Though we did not report any genome-wide significant SNPs, we report heritability estimates for the twin-cohorts between 26–48%, and a SNP-heritability of 11% for an unrelated sub-cohort. Cross-trait PRS analyses showed that the genetic risk for schizophrenia and autism spectrum disorder were significantly associated with hoarding symptoms. We also found suggestive evidence for an association with educational attainment. There were no significant associations with other phenotypes previously linked to HD, such as obsessive-compulsive disorder, depression, anxiety, or attention-deficit hyperactivity disorder. To conclude, we found that HS are heritable, confirming and extending previous twin studies but we had limited power to detect any genome-wide significant loci. Much larger samples will be needed to further extend these findings and reach a “gene discovery zone”. To move the field forward, future research should not only include genetic analyses of quantitative hoarding traits in larger samples, but also in samples of individuals meeting strict diagnostic criteria for HD, and more ethnically diverse samples.
Learning by Fixing: Solving Math Word Problems with Weak Supervision
Creators: name: Hong, Yining
name: Li, Qing
name: Ciao, Daniel
name: Huang, Siyuan
name: Zhu, Song-Chun
Publisher: name: arXiv
Year: 2020
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Computation and Language (cs.CL)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Previous neural solvers of math word problems (MWPs) are learned with full supervision and fail to generate diverse solutions. In this paper, we address this issue by introducing a \textit{weakly-supervised} paradigm for learning MWPs. Our method only requires the annotations of the final answers and can generate various solutions for a single problem. To boost weakly-supervised learning, we propose a novel \textit{learning-by-fixing} (LBF) framework, which corrects the misperceptions of the neural network via symbolic reasoning. Specifically, for an incorrect solution tree generated by the neural network, the \textit{fixing} mechanism propagates the error from the root node to the leaf nodes and infers the most probable fix that can be executed to get the desired answer. To generate more diverse solutions, \textit{tree regularization} is applied to guide the efficient shrinkage and exploration of the solution space, and a \textit{memory buffer} is designed to track and save the discovered various fixes for each problem. Experimental results on the Math23K dataset show the proposed LBF framework significantly outperforms reinforcement learning baselines in weakly-supervised learning. Furthermore, it achieves comparable top-1 and much better top-3/5 answer accuracies than fully-supervised methods, demonstrating its strength in producing diverse solutions.
Non-ohmicity and energy relaxation in diffusive 2D metals
Creators: name: Ceder, Roy
name: Agam, Oded
name: Ovadyahu, Zvi
Publisher: name: arXiv
Year: 2005
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We analyze current-voltage characteristics taken on Au-doped indium-oxide films. By fitting a scaling function to the data, we extract the electron-phonon scattering rate as function of temperature, which yields a quadratic dependence of the electron-phonon scattering rate on temperature from 1K down to 0.28K. The origin of this enhanced electron-phonon scattering rate is ascribed to the mechanism proposed by Sergeev and Mitin.
description: 7 pages, 6 figures
FOOD SAFETY: WHAT IS ECONOMISTS' VALUE ADDED?
Creators: name: Caswell, Julie A.
name: Caswell, Julie A.
Publisher: name: Unknown
Year: 2003
Subjects: Food Consumption/Nutrition/Food Safety

description: Economists are contributing to the food safety arena by analyzing demand for food safety, the consumer level benefits of improved food safety, the costs and benefits to companies from quality assurance for food safety, and the benefits and costs of government regulations aimed at improving food safety. In the food safety area, too much attention has been paid to risk assessment and not enough to risk management. Economists have a very important role to play in improving private and public risk management in areas such as pathogen reduction, use of traceability, and biotechnology.
Beyond Offline Mapping: Learning Cross Lingual Word Embeddings through Context Anchoring
Creators: name: Ormazabal, Aitor
name: Artetxe, Mikel
name: Soroa, Aitor
name: Labaka, Gorka
name: Agirre, Eneko
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computation and Language (cs.CL)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Recent research on cross-lingual word embeddings has been dominated by unsupervised mapping approaches that align monolingual embeddings. Such methods critically rely on those embeddings having a similar structure, but it was recently shown that the separate training in different languages causes departures from this assumption. In this paper, we propose an alternative approach that does not have this limitation, while requiring a weak seed dictionary (e.g., a list of identical words) as the only form of supervision. Rather than aligning two fixed embedding spaces, our method works by fixing the target language embeddings, and learning a new set of embeddings for the source language that are aligned with them. To that end, we use an extension of skip-gram that leverages translated context words as anchor points, and incorporates self-learning and iterative restarts to reduce the dependency on the initial dictionary. Our approach outperforms conventional mapping methods on bilingual lexicon induction, and obtains competitive results in the downstream XNLI task.
description: ACL 2021
Robust Motion Control for Mobile Manipulator Using Resolved Acceleration and Proportional-Integral Active Force Control
Creators: name: Mailah, Musa
name: Pitowarno, Endra
name: Jamaluddin, Hishamuddin
Publisher: name: arXiv
Year: 2006
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: A resolved acceleration control (RAC) and proportional-integral active force control (PIAFC) is proposed as an approach for the robust motion control of a mobile manipulator (MM) comprising a differentially driven wheeled mobile platform with a two-link planar arm mounted on top of the platform. The study emphasizes on the integrated kinematic and dynamic control strategy in which the RAC is used to manipulate the kinematic component while the PIAFC is implemented to compensate the dynamic effects including the bounded known/unknown disturbances and uncertainties. The effectivenss and robustness of the proposed scheme are investigated through a rigorous simulation study and later complemented with experimental results obtained through a number of experiments performed on a fully developed working prototype in a laboratory environment. A number of disturbances in the form of vibratory and impact forces are deliberately introduced into the system to evaluate the system performances. The investigation clearly demonstrates the extreme robustness feature of the proposed control scheme compared to other systems considered in the study.
การศึกษารูปแบบและวิธีการจัดกิจกรรมลดเวลาเรียน เพิ่มเวลารู้: กรณีศึกษาการสนทนาภาษาญี่ปุ่น ในอาเซียนศึกษา ชั้นมัธยมศึกษาตอนต้น โรงเรียนทรัพย์ไพรวัลย์วิทยาคม
Creators: name: ฉันทนา จันทร์บรรจง
Publisher: name: สมาคมญี่ปุ่นศึกษาแห่งประเทศไทย
Year: 2018
Subjects: กิจกรรมลดเวลาเรียนเพิ่มเวลารู้
การสนทนาภาษาญี่ปุ่น
ชั้นมัธยมศึกษาตอนต้น

description: วารสารเครือข่ายญี่ปุ่นศึกษา, 8, พิเศษ, 174-187
The Effectiveness of Teaching ????? and ????? in Japanese through Pictures and The Learners' Satisfaction
Creators: name: Suphin Sanruang
Publisher: name: สมาคมญี่ปุ่นศึกษาแห่งประเทศไทย
Year: 2018
Subjects: pictures
teaching
effectiveness
learners' satisfaction

description: วารสารเครือข่ายญี่ปุ่นศึกษา, 8, พิเศษ, 188-205
Dierkes, Karl-Michael, Anglikanische Frömmigkeit und Lehre im Kirchenlied ...
Creators: name: Gassmann, Günther
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 21 Nr. 2 (1972): Ökumenische Rundschau, Band 21, Heft 2
Slave-boson theory of the Mott transition in the two-band Hubbard model
Creators: name: Rüegg, A.
name: Indergand, M.
name: Pilgram, S.
name: Sigrist, M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We apply the slave-boson approach of Kotliar and Ruckenstein to the two-band Hubbard model with an Ising like Hund's rule coupling and bands of different widths. On the mean-field level of this approach we investigate the Mott transition and observe both separate and joint transitions of the two bands depending on the choice of the inter- and intraorbital Coulomb interaction parameters. The mean-field calculations allow for a simple physical interpretation and can confirm several aspects of previous work. Beside the case of two individually half-filled bands we also examine what happens if the original metallic bands possess fractional filling either due to finite doping or due to a crystal field which relatively shifts the atomic energy levels of the two orbitals. For appropriate values of the interaction and of the crystal field we can observe a a band insulating state and a ferromagnetic metal.
Derivative-Based Koopman Operators for Real-Time Control of Robotic Systems
Creators: name: Mamakoukas, Giorgos
name: Castano, Maria L.
name: Tan, Xiaobo
name: Murphey, Todd D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: Numerical Analysis (math.NA)
subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: This paper presents a generalizable methodology for data-driven identification of nonlinear dynamics that bounds the model error in terms of the prediction horizon and the magnitude of the derivatives of the system states. Using higher-order derivatives of general nonlinear dynamics that need not be known, we construct a Koopman operator-based linear representation and utilize Taylor series accuracy analysis to derive an error bound. The resulting error formula is used to choose the order of derivatives in the basis functions and obtain a data-driven Koopman model using a closed-form expression that can be computed in real time. Using the inverted pendulum system, we illustrate the robustness of the error bounds given noisy measurements of unknown dynamics, where the derivatives are estimated numerically. When combined with control, the Koopman representation of the nonlinear system has marginally better performance than competing nonlinear modeling methods, such as SINDy and NARX. In addition, as a linear model, the Koopman approach lends itself readily to efficient control design tools, such as LQR, whereas the other modeling approaches require nonlinear control methods. The efficacy of the approach is further demonstrated with simulation and experimental results on the control of a tail-actuated robotic fish. Experimental results show that the proposed data-driven control approach outperforms a tuned PID (Proportional Integral Derivative) controller and that updating the data-driven model online significantly improves performance in the presence of unmodeled fluid disturbance. This paper is complemented with a video: https://youtu.be/9_wx0tdDta0.
Automatic selection of clustering algorithms using supervised graph embedding
Creators: name: Cohen-Shapira, Noy
name: Rokach, Lior
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Information Retrieval (cs.IR)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: The widespread adoption of machine learning (ML) techniques and the extensive expertise required to apply them have led to increased interest in automated ML solutions that reduce the need for human intervention. One of the main challenges in applying ML to previously unseen problems is algorithm selection - the identification of high-performing algorithm(s) for a given dataset, task, and evaluation measure. This study addresses the algorithm selection challenge for data clustering, a fundamental task in data mining that is aimed at grouping similar objects. We present MARCO-GE, a novel meta-learning approach for the automated recommendation of clustering algorithms. MARCO-GE first transforms datasets into graphs and then utilizes a graph convolutional neural network technique to extract their latent representation. Using the embedding representations obtained, MARCO-GE trains a ranking meta-model capable of accurately recommending top-performing algorithms for a new dataset and clustering evaluation measure. Extensive evaluation on 210 datasets, 13 clustering algorithms, and 10 clustering measures demonstrates the effectiveness of our approach and its superiority in terms of predictive and generalization performance over state-of-the-art clustering meta-learning approaches.
Antiferromagnetic correlations in strongly valence fluctuating CeIrSn
Creators: name: Shimura, Y.
name: Wörl, A.
name: Sundermann, M.
name: Tsuda, S.
name: Adroja, D. T.
name: Bhattacharyya, A.
name: Strydom, A. M.
name: Hillier, A. D.
name: Pratt, F.
name: Gloskovskii, A.
name: Severing, A.
name: Onimaru, T.
name: Gegenwart, P.
name: Takabatake, T.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: CeIrSn with a quasikagome Ce lattice in the hexagonal basal plane is a strongly valence fluctuating compound, as we confirm by hard x-ray photoelectron spectroscopy and inelastic neutron scattering, with a high Kondo temperature of $T_{\mathrm{K}}\sim 480$\,K. We report a negative in-plane thermal expansion $α/T$ below 2\,K, which passes through a broad minimum near 0.75\,K. Volume and $a$-axis magnetostriction for $B \parallel a$ are markedly negative at low fields and change sign before a sharp metamagnetic anomaly at 6\,T. These behaviors are unexpected for Ce-based intermediate valence systems, which should feature positive expansivity. Rather they point towards antiferromagnetic correlations at very low temperatures. This is supported by muon spin relaxation measurements down to 0.1\,K, which provide microscopic evidence for a broad distribution of internal magnetic fields. Comparison with isostructural CeRhSn suggests that these antiferromagnetic correlations emerging at $T\ll T_{\mathrm{K}}$ result from geometrical frustration.
description: to be published in Phys. Rev. Lett
The baryonic mass function of galaxies
Creators: name: Read, J. I.
name: Trentham, Neil
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In the Big Bang about 5% of the mass that was created was in the form of normal baryonic matter (neutrons and protons). Of this about 10% ended up in galaxies in the form of stars or of gas (that can be in molecules, can be atomic, or can be ionised). In this work, we measure the baryonic mass function of galaxies, which describes how the baryonic mass is distributed {\it within} galaxies of different types (e.g. spiral or elliptical) and of different sizes. This can provide useful constraints on our current cosmology, convolved with our understanding of how galaxies form. This work relies on various large astronomical surveys, for example the optical Sloan Digital Sky Survey (to observe stars) and the HIPASS radio survey (to observe atomic gas). We then perform an integral over our mass function to determine the cosmological density in baryons in galaxies: $Ω_{\rm b, gal} = 0.0035$. Most of these baryons are in stars: $Ω_{*} = 0.0028$. Only about 20% are in gas. The error on the quantities, as determined from the range obtained between different methods, is $\sim 10$%; systematic errors may be much larger. Most ($\sim 90$%) of the baryons in the Universe are not in galaxies. They probably exist in a warm/hot intergalactic medium. Searching for direct observational evidence and deeper theoretical understanding for this will form one of the major challenges for astronomy in the next decade.
description: 17 pages, 4 figures. Accepted for publication in the Triennial Issue of The Philosophical Transactions of the Royal Society (A). Final version with minor changes suggested by the three referees
D9.1: Dissemination and Communication plan (v1)
Creators: name: Level 9
Publisher: name: Zenodo
Year: 2024

description: This DCP is crafted for the InterPED project under Work Package 9, targeting the effective dissemination and communication of the project’s developments over the first 18 months. The plan strategically outlines how to maximise visibility and engage a broad audience that includes energy professionals, urban planners, policymakers, citizens, and academia. It details a dual approach: ongoing communication to keep stakeholders informed about the project’s progress, and targeted dissemination to ensure the adoption of project outcomes.

The DCP defines specific roles for consortium partners, ensuring a unified approach to promote the project and its innovative solutions for PEDs across Europe. Additionally, it establishes a visual identity to enhance recognition and coherence in all outreach efforts. KPIs are set to monitor and optimise the effectiveness of these efforts, aligning with the project’s goal of advancing sustainable urban energy systems.
Magnetization reversal in the anisotropy-dominated regime using time-dependent magnetic fields
Creators: name: Rivkin, K.
name: Ketterson, J. B.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We study magnetization reversal using various r.f. magnetic pulses. We show numerically that switching is possible with simple sinusoidal pulses; however the optimum approach is to use a frequency-swept (chirped) r.f. magnetic pulse, the shape of which can be derived analytically. Switching times of the order of nanoseconds can be achieved with relatively small r.f. fields, independent of the anisotropy's strength.
INSURING EGGS IN BASKETS
Creators: name: Hart, Chad E.
name: Hayes, Dermot J.
name: Babcock, Bruce A.
name: Hart, Chad E.
name: Hayes, Dermot J.
name: Babcock, Bruce A.
Publisher: name: Unknown
Year: 2003
Subjects: subject: Livestock Production/Industries
subject: Risk and Uncertainty
subject: correlations
subject: diversification
subject: livestock
subject: volatilities
subject: whole-farm revenue insurance

description: The vast majority of crop and revenue insurance policies sold in the United States are single-crop policies that insure against low yields or low revenues for each crop grown on a particular farm. This practice of insuring one crop at a time runs counter to the traditional risk management practice of diversifying across several enterprises to avoid putting all of ones eggs in a single basket. This paper examines the construction of whole-farm crop revenue insurance programs to include livestock. The whole-farm insurance product covers crop revenues from corn and soybeans and livestock revenues from hog production. The results show that at coverage levels of 95 percent or lower, the fair insurance premiums for this product on a well-diversified Iowa hog farm are far lower than the fair premiums for the corn crop alone on the same farm. The calculation of premium rates for the whole-farm insurance product is derived from a method for imposing correlations first proposed by Iman and Conover in 1982.
Cosmic rays, neutrinos and GeV-TeV gamma rays from Starburst Galaxy NGC 4945
Creators: name: Aguilar-Ruiz, E.
name: Fraija, N.
name: Joshi, Jagdish C.
name: Galvan-Gamez, A.
name: de Diego, J. A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The detection of high-energy astrophysical neutrinos and ultra-high-energy cosmic rays (UHECRs) provides a new way to explore sources of cosmic rays. One of the highest energy neutrino events detected by IceCube, tagged as IC35, is close to the UHECR anisotropy region detected by Pierre Auger Observatory. The nearby starburst galaxy (SBG), NGC 4945, is close to this anisotropic region and inside the mean angular error of the IC35 event. Considering the hypernovae contribution located in the SB region of NGC 4945, which can accelerate protons up to $\sim 10^{17} \, {\rm eV}$ and inject them into the interstellar medium, we investigate the origin of this event around this starburst galaxy. We show that the interaction of these protons with the SB region's gas density could explain Fermi-LAT gamma-ray and radio observations if the magnetic field's strength in the SB region is the order of $\sim \rm mG$. Our estimated PeV neutrino events, in ten years, for this source is approximately 0.01 ($4\times10^{-4}$) if a proton spectral index of 2.4 (2.7) is considered, which would demonstrate that IC35 is not produced in the central region of this SBG. Additionally, we consider the superwind region of NGC 4945 and show that protons can hardly be accelerated in it up to UHEs.
description: Accepted in Physical Review D
title: Etuaptmumk: Two-Eyed Seeing, Indigenous Educator Lived Experience, and Speculative Futures for Education
Creators: name: Frawley, Angela
Publisher: name: Vancouver Island University
Year: 2024
Subjects: School of education and technology

description: 2024
description: This study explores the experiences of Indigenous educators in Ontario, focusing on futures of education and providing recommendations for educational institutions and policy. This research is important for the field of education because it creates space for Indigenous educator voices in the literature and academia and highlights the need for transformative change in education. This qualitative study used Indigenous methodologies, the Conversational Method, and narrative inquiry. Thematic analysis revealed three central themes: (1) The impacts of settler colonialism and the complexities of reconciliation; (2) Etuaptmumk: Two-Eyed Seeing and embracing multiple worldviews; and (3) Imagining hopeful futures for education including the Haudenosaunee Seventh Generation Principle and the role of technology. Recommendations include reframing how education systems approach teaching and learning by examining how to prepare educators in preservice and professional development training; informing antiracist policy, pedagogy, and programming; and considering alternative spaces and ways of learning.
Optimal Antibiotic Usage with Resistance and Endogenous Technological Change
Creators: name: Secchi, Silvia
name: Babcock, Bruce A.
name: Secchi, Silvia
name: Babcock, Bruce A.
Publisher: name: Unknown
Year: 2001
Subjects: Livestock Production/Industries
Research and Development/Tech Change/Emerging Technologies

description: The authors develop an expected utility model with heterogeneous individuals and apply some of the approaches developed in the energy literature to explicitly identify the public nature characteristics of susceptibility in a dynamic setting and to characterize the optimal intertemporal usage problem from a social planner perspective. The authors determine the optimal time path for the depletion of susceptibility to an existing drug and show that use of antibiotics should be rationed across the population and through time. The authors also discuss the impact of endogenous technological change and analyze the dynamics of research activities in backstop technologies both in a certain and in an uncertain world. The authors show that resources invested in R&D should increase through time if the discovery process is uncertain.
Cuntz-Pimsner C*-algebras associated with subshifts
Creators: name: Carlsen, Toke Meier
Publisher: name: arXiv
Year: 2005
Subjects: subject: Operator Algebras (math.OA)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 46L55 (primary), 37B10 (secondary)

description: By using C*-correspondences and Cuntz-Pimsner algebras, we associate to every subshift (also called a shift space) $X$ a C*-algebra $O_X$, which is a generalization of the Cuntz-Krieger algebras. We show that $O_X$ is the universal C*-algebra generated by partial isometries satisfying relations given by $X$. We also show that $O_X$ is a one-sided conjugacy invariant of $X$.
description: 28 pages. This is a slightly updated version of a preprint from 2004. Submitted for publication. In version 2 the Introduction has been changed, two remarks (Remark 7.6 and 7.7) have been added and the list of references has been updated
The Relative Efficiency of Voluntary vs. Mandatory Environmental Regulations
Creators: name: Wu, JunJie
name: Babcock, Bruce A.
name: Wu, JunJie
name: Babcock, Bruce A.
Publisher: name: Unknown
Year: 1996
Subjects: Environmental Economics and Policy

description: Conservation program administered by USDA have traditionally been voluntary, with USDDA providing technical and fiscal assistance to farmers. This tradition is continued din the Federal Agriculture Improvement and Reform Act of 1996. Under these programs, farmers commit themselves to adopting a land management practice and, in turn, the government provides technical and financial assistance. Our analysis suggest that these voluntary programs are more efficient than a program that mandates adoption if and only if the per acre social cost of government expenditure under these program is less than the largest per acre farmer loss under the mandatory approach plus the additional implementation and enforcement cost. This necessary and sufficient condition is likely to be satisfied when (a) the deadweight loss from raising the government revue is zero or small, (b) a large proportion of government services is public goods, (c) the area the program targets is large, (d) the price of government services is lower than what farmers would have to pay for equivalent private services, (e) the maximum per acre loss under the mandatory program is large, and (f) the monitoring and enforcement cost is much larger for the mandatory program than for the voluntary program.
title: Why Don’t We Practice? Weaving Simulation into the Fabric of Quality Care
Creators: name: Korns, Kristen
Publisher: name: Vancouver Island University
Year: 2024
Subjects: School of leadership studies

description: 2024
description: As complexity and unpredictability continually challenge the British Columbia (BC) healthcare system, there is an increasing need for more comprehensive learning strategies to support healthcare practitioners. When delivered effectively, simulation-based learning creates opportunities for interprofessional interaction, embodied practice, and improved team performance. This research explored how the Simulation Program at BC Children’s Hospital and BC Women’s Hospital could be enhanced for improved quality care within increasingly dynamic environments replete with uncertainty. Using an action research framework with participatory reflection, focus groups and interviews offered insight into the experiences of simulation practitioners across BC, giving rise to four key recommendations: build awareness through a clearly articulated vision; strengthen partnerships to ensure synergy with executive and operational leaders for a culture of continued learning; revitalize strategic planning and goal setting for organizational alignment; and create a research-driven environment, developing appropriate metrics that measure and optimize the fuller value proposition of simulation.
CAGD - Computer Aided Gripper Design for a Flexible Gripping System
Creators: name: Sdahl, Michael
name: Kuhlenkoetter, Bernd
Publisher: name: arXiv
Year: 2006
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: This paper is a summary of the recently accomplished research work on flexible gripping systems. The goal is to develop a gripper which can be used for a great amount of geometrically variant workpieces. The economic aspect is of particular importance during the whole development. The high flexibility of the gripper is obtained by three parallel used principles. These are human and computer based analysis of the gripping object as well as mechanical adaptation of the gripper to the object with the help of servo motors. The focus is on the gripping of free-form surfaces with suction cup.
EQUILIBRIUM AND EFFICIENT LAND-USE ARRANGEMENTS UNDER SPATIAL EXTERNALITY ON A LATTICE
Creators: name: Saak, Alexander E.
name: Saak, Alexander E.
Publisher: name: Unknown
Year: 2004
Subjects: subject: Land Economics/Use
subject: graph partitioning
subject: land-use arrangement
subject: spatial externality
subject: supermodular game

description: Many cases of externalities in agricultural production, such as pesticide drift, cross-pollination, and offensive odors, are attributable to the incompatibility of neighboring land uses and exhibit distance dependence. We characterize equilibrium spatial patterns of externality-generating and -receiving land uses on a two-dimensional lattice with noncooperative, profit-maximizing producers. In equilibrium, generators or recipients form one or more neighborhoods with certain geometric properties, depending on how an externality dissipates with distance and whether there is an externality generated outside the region's boundaries. Efficient land-use arrangements maximize social welfare subject to the implementability constraints stipulating that no farm-level activity, except for land use, can be directly controlled by the social planner. We characterize efficient land-use arrangements when the return to recipient land use decreases linearly with the length of the border shared with incompatible land uses. Under these assumptions, we find circumstances in which an efficient activity arrangement belongs to the set of the Nash equilibrium outcomes. Also, efficient arrangements in a more general case are discussed.