cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Discovery of Counter-Rotating Gas in the Galaxies NGC1596 and NGC3203 and the Incidence of Gas Counter-Rotation in S0 Galaxies
Creators: name: Bureau, M.
name: Chung, A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have identified two new galaxies with gas counter-rotation (NGC1596 and NGC3203) and have confirmed similar behaviour in another one (NGC128), this using results from separate studies of the ionized-gas and stellar kinematics of a well-defined sample of 30 edge-on disc galaxies. Gas counter-rotators thus represent 10+/-5% of our sample, but the fraction climbs to 21+/-11% when only lenticular (S0) galaxies are considered and to 27+/-13% for S0s with detected ionized-gas only. Those fractions are consistent with but slightly higher than previous studies. A compilation from well-defined studies of S0s in the literature yields fractions of 15+/-4% and 23+/-5%, respectively. Although mainly based on circumstantial evidence, we argue that the counter-rotating gas originates primarily from minor mergers and tidally-induced transfer of material from nearby objects. Assuming isotropic accretion, twice those fractions of objects must have undergone similar processes, underlining the importance of (minor) accretion for galaxy evolution. Applications of gas counter-rotators to barred galaxy dynamics are also discussed.
description: 8 pages, including 1 table and 2 figures. Accepted for publication in MNRAS. Version with full resolution figures available at http://www-astro.physics.ox.ac.uk/~bureau/pub_list.html
Household Snack-Food Purchases: Does Nutrition Matter?
Creators: name: Rimal, Arbindra
name: Fletcher, Stanley M.
name: Rimal, Arbindra
name: Fletcher, Stanley M.
Publisher: name: Unknown
Year: 2003
Subjects: Consumer/Household Economics
Food Consumption/Nutrition/Food Safety

description: Purchase patterns for two types of snack foods--pretzels and popcorn, and potato, corn, and tortilla chips--were analyzed using the data from a national survey. The study examined the effect of socio-economic and lifestyle factors including nutritional awareness and exercise habits of household respondents on snack-food purchase. A geometric-hurdle count-data model that distinguished between market-participation and purchase-frequency decisions revealed that the decision to participate in the market for snack food was separate from the purchase-level decision. Pretzels and popcorn consumers were unaffected by nutrition consideration of any kind. However, respondents who were overly concerned about desirable nutritional factors were unlikely to be buyers or potential buyers of snacks such as potato, corn, and tortilla chips.
Vibration transfer path analysis and path ranking for NVH optimization of a vehicle interior
Creators: name: Sakhaei, Babak
name: Durali, Mohammad
name: Hashemi, Navid
Publisher: name: arXiv
Year: 2020
Subjects: subject: Signal Processing (eess.SP)
subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: By new advancements in vehicle manufacturing; evaluation of vehicle quality assurance has got a more critical issue. Today noise and vibration generated inside and outside the vehicles are more important factors for customers than previous. So far several researchers have focused on interior noise transfer path analysis and the results have been published in related papers but each method has its own limitations. In present work, the vibration transfer path analysis and vibration path ranking of a car interior has been performed. As interior vibration is a source of structural borne noise problem, thus the results of this research can be used to present the structural borne noise state in a vehicle. The method proposed in this paper, in opposite of the earlier methods, do not need to disassemble the power train from the chassis. The procedure shows a good ability of vibration path ranking in a vehicle and is an effective tool to diagnose the vibration problem inside the vehicle. The simulated vibration spectrums in different speeds of the engine have a good compliance with the tested results however some incompatibilities exist and have been discussed in details. The simulated results show the strength of the method in engine mount optimization.
From join-irreducibles to dimension theory for lattices with chain conditions
Creators: name: Wehrung, Friedrich
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Mathematics (math.GM)
subject: FOS: Mathematics
subject: 06B05, 06B10, 06B99, 06B35

description: For a finite lattice L, the congruence lattice Con L of L can be easily computed from the partially ordered set J(L) of join-irreducible elements of L and the join-dependency relation D\_L on J(L). We establish a similar version of this result for the dimension monoid Dim L of L, a natural precursor of Con L. For L join-semidistributive, this result takes the following form: Theorem 1. Let L be a finite join-semidistributive lattice. Then Dim L is isomorphic to the commutative defined by generators D(p), for p in J(L), and relations D(p) +D(q) = D(q), for all p, q in J(L) such that p D\_L q . As a consequence, we obtain the following results: Theorem 2. Let L be a finite join-semidistributive lattice. Then L is a lower bounded homomorphic image of a free lattice iff Dim L is strongly separative, iff it satisfies the quasi-identity 2x=x implies x=0. Theorem 3. Let A and B be finite join-semidistributive lattices. Then the box product A $\bp$ B f A and B is join-semidistributive, and Dim(A $\bp$ B) is isomorphic to $Dim A \otimes Dim B$, where $\otimes$ denotes the tensor product of commutative monoids.
Meat Managers' Expectations Regarding Marketing of Irradiated Red Meats
Creators: name: Gaynor, Joe
name: Jensen, Kimberly L.
name: Jaenicke, Edward C.
name: Gaynor, Joe
name: Jensen, Kimberly L.
name: Jaenicke, Edward C.
Publisher: name: Unknown
Year: 2003
Subjects: Agribusiness

description: The objective of this study is to assess meat managers' expectations about impact of the recent regulatory approval of irradiated raw meat and meat products on marketing decisions and plans by supermarkets and grocery meat retailers. Forty managers of meat departments were interviewed in person to obtain the information for the study. While many of the meat managers believed that irradiation would help increase shelf life and reduce spoilage, they were less optimistic about consumers being willing to pay a higher price for the irradiated product than the non-irradiated product.
SOME CONSIDERATIONS IN THE MARKETING OF GENERIC GROCERY PRODUCTS
Creators: name: Hawes, Jon M.
name: Uhring, Nancy E.
name: Hawes, Jon M.
name: Uhring, Nancy E.
Publisher: name: Unknown
Year: 1982
Subjects: subject: Marketing
subject: FOS: Economics and business

description: This paper provides an overview of the introduction and subsequent marketing of generic grocery products in the U.S. The authors also identify some of the reasons for the sales success of generics.
Development of preclinical imaging to refine studies of dysfunctional blood flow in the brain
Creators: name: Crofts, Andrew
Publisher: name: University of Leicester
Year: 2020
Subjects: Uncategorized

description: The brain has the highest energy demand of any organ in the body, but despite this, has very little energy reserves. Because of this, the brain rapidly redirects blood flow, in response to changes in demand, through the process of neurovascular coupling. In the healthy brain, a 5% increase in oxygen demand is met by a 50% increase in blood flow, providing sufficient energy for normal activity. However, with age, or in pathological conditions such as hypertension or ischaemic stroke, this coupling is disrupted, which is thought to contribute to cognitive impairment in these conditions. To understand the processes behind this, non-invasive imaging of animal models would be beneficial.Functional magnetic resonance imaging (fMRI) is a non-invasive imaging modality which uses changes in oxyhaemoglobin and deoxyhaemoglobin to image changes in brain activity (the Blood Oxygen Level Dependent, or BOLD, signal). Its use in longitudinal preclinical studies is currently limited by factors including appropriate anaesthesia, as current anaesthetic agents can be harmful or impair the vascular response detected.This PhD aims to address the limitations of preclinical fMRI through development of a novel anaesthesia protocol, and use of additional MRI sequences to supplement BOLD fMRI, incuding functional magnetic resonance spectroscopy (fMRS) and perfusion MRI using arterial spin labelling (ASL). When these methods were applied to a rodent model of healthy ageing, fMRI using forepaw stimulation showed a decrease in the size of the activated region in the somatosensory cortex with age, coupled with a decrease in glutamate turnover, while cerebral blood flow remained the same. This suggests that the change in BOLD signal observed in ageing is a consequence of a reduction in neuronal metabolism, rather than impairment of neurovascular coupling. When applied to a rodent model of hypertension, the opposite was observed, in which an increase in resting CBF was observed as hypertension progressed, followed by a decrease in the size of the BOLD signal, with no significant change in glutamate turnover, suggesting the changes in BOLD signal are vascular in origin. Due to the high variability in lesion volume, stroke experiments were inconclusive.This thesis shows that propofol is a suitable anaesthetic agent for longitudinal fMRI, and that other less common MRI modalities combined with BOLD fMRI can provide new insights into long term changes in neurovascular function.
EHDEN - D3.4 - Second Report on the Implementation of the Analytical Pipeline for Personalized Medicine
Creators: name: Rijnbeek, Peter
name: Rekkas, Alexandros
name: Williams, Ross
name: John, Luis H
name: Markus, Aniek
name: Yang, Cynthia
name: Seinen, Tom
name: Alhambra, Daniel Prieto
name: Reisberg, Sulev
Publisher: name: Zenodo
Year: 2020
Subjects: Patient-Level Prediction
Population-Level Effect Estimation
Risk Stratified Effect Estimation
Natural language processing
Disease trajectories

description: There are large opportunities to use the massive amount of observational data in Europe for personalized decision-making. However, the lack of inter-operability of the data sources makes this a challenging task. The differences in structure (syntactic inter-operability) and terminology systems (semantic inter-operability) make the development of standardized analytical pipelines cumbersome. The European Health Data and Evidence Network (EHDEN) project is addressing this by standardizing a large amount of European data sources to the OMOP Common Data Model (CDM). The goal of WP3 “Personalized Medicine” is to establish a standardized process to enable personalized decision-making that can be utilized for multiple outcomes of interest and can be applied to observational healthcare data from any patient subpopulation. In the first report on WP3 activities, we introduced the analytical pipelines for Patient-Level Prediction and Population-Level Effect Estimation. Furthermore, we discussed our initial work for the development of a pipeline for Risk Stratified Effect Estimation to assess heterogeneity of treatment effect. The current second report provides an update on the work done in the second year. This includes an overview of use cases in which the analytical pipelines have been applied and describes the advances made in methodological research, the start of a natural language processing pipeline, and work done to develop a pipeline for disease trajectories. This work falls under Task 3.2. “Development of an integrated patient-level prediction pipeline” (M6-M60), Task 3.3 “Development of an integrated risk-effect estimation pipeline” (M6-M60), and Task 3.4 “Development of a pipeline for disease trajectory analysis” (M12-M36).
[Letter from Anna Antoinette Weber van Bosse]
Creators: name: Weber Van Bosse, Anna Antoinette
Publisher: name: Unknown
Year: 1901
Subjects: Bornet, Jean-Baptiste Édouard
Philippi
Heydrich, Franz

description: Expresses gratitude for receiving the paper: On three new Lithothamnia. The new slides will be made from Lithophyllum expansum and Lithophyllum decussatum Philippi. Information that the Lithophyllum expansum from the Golf of Naples is a Goniolithan. She saw a distinct tap. Grateful for information that the slides of the Siboga material are too thick. Heydrich will not allow her to send anything more. Following Foslie's advice, she has written to Mr. Heydrich and told him about the publication of Lithophyllum reinboldii.
A COMPARISON OF UNLOADING UNITIZED TRUCK LOADS OF GROCERIES AT FINAL DISTRIBUTION WAREHOUSES -- PALLETS VERSUS SLIPSHEETS --
Creators: name: Runyan, Jack L.
name: Runyan, Jack L.
Publisher: name: Unknown
Year: 1982
Subjects: Agribusiness

description: The author evaluates the efficiency of unitized truck loads utilizing pallets versus slipsheets
A Study of Impact Of Business Communication On Employability Of Management Graduates Using factor Analysis
Creators: name: Dr. Preeti Sharma
name: Ms Jyoti Mishra
Publisher: name: figshare
Year: 2020
Subjects: subject: 200101 Communication Studies
subject: FOS: Media and communications

description: In today's highly competitive job market, the importance of strong communication skills cannot be overlooked. It has a direct bearing on the success ratio of a candidate in his placement journey. The paper outlines the importance of communication and its relation to the employability prospects of a candidate. The paper is written with an aim of fortifying the understanding of being well versed in communication skills and ascertaining the impact it has on the successful placement of students. In addition, it also analyses whether the students of metro have an added advantage over the students coming from Tier 2 cities. To fulfill the objectives of study different statistical techniques like reliability analysis, factor analysis and descriptive analysis have been used. The primary data which was collected through a self-constructed questionnaire has been used for the study.
Analysis of the BATSE Continuous MER data
Creators: name: Veres, P.
name: Horvath, I.
name: Balazs, L. G.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The CGRO/BATSE database includes many types of data such as the 16-channel continuous background or medium energy resolution burst data (CONT and MER data types). We have calculated some four hundred burst's medium energy resolution spectra and Principal Component Analysis has been applied. We found five components can describe GRBs' spectra.
description: 4 pages, 2 figures, accepted in Nuovo Cimento
Deep Learning feature selection to unhide demographic recommender systems factors
Creators: name: Bobadilla, Jesús
name: González-Prieto, Ángel
name: Ortega, Fernando
name: Lara-Cabrera, Raúl
Publisher: name: arXiv
Year: 2020
Subjects: subject: Information Retrieval (cs.IR)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: Neural and Evolutionary Computing (cs.NE)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: I.5.1

description: Extracting demographic features from hidden factors is an innovative concept that provides multiple and relevant applications. The matrix factorization model generates factors which do not incorporate semantic knowledge. This paper provides a deep learning-based method: DeepUnHide, able to extract demographic information from the users and items factors in collaborative filtering recommender systems. The core of the proposed method is the gradient-based localization used in the image processing literature to highlight the representative areas of each classification class. Validation experiments make use of two public datasets and current baselines. Results show the superiority of DeepUnHide to make feature selection and demographic classification, compared to the state of art of feature selection methods. Relevant and direct applications include recommendations explanation, fairness in collaborative filtering and recommendation to groups of users.
description: 20 pages, 14 figures, 1 table
On the elliptic locus of a family of projectiles
Creators: name: Rizcallah, Joseph A
Publisher: name: arXiv
Year: 2020
Subjects: subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: A little known property of free-fall motion is the elliptic locus of the maximum heights attained by coplanar projectiles launched from a single point in different directions with the same initial speed. Another, less known and perhaps somewhat surprising, property of this family consists in the said ellipse being also the geometric locus of the critical points of the projectiles' distances from the launch point. In the article, to gain a better perspective on the geometry involved, we consider these loci from the standpoint of a free-falling frame. It is shown that, in this reference frame, the considered loci are congruent circles tangent to each other along the horizontal and internally tangent to another, twice as big a circle, which represents the locus of the projectiles' ranges. This simplified geometric description is employed to recover the elliptic locus in the laboratory frame and further explore its properties.
description: 14 pages, 8 figures
Advertising and Retail Promotion of Washington Apples: A Structural Latent Variable Approach to Promotion Evaluation
Creators: name: Richards, Timothy J.
name: Gao, Xiaoming
name: Patterson, Paul M.
name: Richards, Timothy J.
name: Gao, Xiaoming
name: Patterson, Paul M.
Publisher: name: Unknown
Year: 1998
Subjects: subject: Marketing
subject: FOS: Economics and business
subject: commodity promotion
subject: demand system
subject: DYMIMIC
subject: fresh fruit
subject: Kalman filter
subject: LA/AIDS
subject: latent variables

description: "Commodity promotion" consists of many activities, each designed to contribute to a consumer's product knowledge or influence tastes. However, both knowledge and tastes are unobservable, or latent, variables influencing demand. This paper specifies a dynamic structural model of fresh fruit demand that treats promotion and other socioeconomic variables as "causal" variables influencing these latent variables. Estimating this state-space model using a Kalman filter approach provides estimates of both the system parameters and a latent variable series. The results show that these latent effects contribute positively to apple and other fruit consumption, while reducing banana consumption.
Measurement-dependence cost for Bell nonlocality: causal vs retrocausal models
Creators: name: Hall, Michael J. W.
name: Branciard, Cyril
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Device independent protocols based on Bell nonlocality, such as quantum key distribution and randomness generation, must ensure no adversary can have prior knowledge of the measurement outcomes. This requires a measurement independence assumption: that the choice of measurement is uncorrelated with any other underlying variables that influence the measurement outcomes. Conversely, relaxing measurement independence allows for a fully `causal' simulation of Bell nonlocality. We construct the most efficient such simulation, as measured by the mutual information between the underlying variables and the measurement settings, for the Clauser-Horne-Shimony-Holt (CHSH) scenario, and find that the maximal quantum violation requires a mutual information of just $\sim 0.080$ bits. Any physical device built to implement this simulation allows an adversary to have full knowledge of a cryptographic key or `random' numbers generated by a device independent protocol based on violation of the CHSH inequality. We also show that a previous model for the CHSH scenario, requiring only $\sim 0.046$ bits to simulate the maximal quantum violation, corresponds to the most efficient `retrocausal' simulation, in which future measurement settings necessarily influence earlier source variables. This may be viewed either as an unphysical limitation of the prior model, or as an argument for retrocausality on the grounds of its greater efficiency. Causal and retrocausal models are also discussed for maximally entangled two-qubit states, as well as superdeterministic, one-sided and zigzag causal models.
description: 16 pages, 7 figures
EHDEN - D3.5 - First Report in educational and training material for the developed analytical tools
Creators: name: Rijnbeek, Peter
name: Hughes, Nigel
Publisher: name: Zenodo
Year: 2020
Subjects: Personalised Medicine
Patient-level prediction
OMOP
Academy
Book of OHDSI
Training
Education

description: The goal of WP3 “Personalized Medicine” is to establish a standardized process to enable personalized decision-making that can be utilized for multiple outcomes of interest and can be applied to observational healthcare data from any patient subpopulation. This short deliverable describes the approach and roadmap for the creation of educational and training materials for the analytical tools developed in WP3. In this first report on this topic, we focus on the progress made for the Patient-Level Prediction domain by discussing the material that has been made available in the Book of OHDSI and a course made available in the EHDEN Academy. This work demonstrates how the EHDEN project is acting as a catalyst for the adoption of the OMOP Common Data Model in Europe by providing an educational program for its stakeholders. This work falls under Task 3.7 “Develop educational and training material for the developed tools (M1-M60)”and is performed in close collaboration with WP4 and specifically Task 4.9 “Integration of material for education and training (M12-M36)”
Optimal Incentive Structure in Cattle Feeding Contracts Under Alternative Fed Cattle Pricing Methods
Creators: name: Rahman, Shaikh Mahfuzur
name: Rahman, Shaikh Mahfuzur
Publisher: name: Unknown
Year: 2006
Subjects: Livestock Production/Industries

description: Developing a multitask principal-agent model, this paper theoretically analyzes the incentive provisions in the existing cattle feeding contracts under alternative fed cattle pricing methods. Comparative statics from the theoretical model are evaluated by simulation experiments. Feedlot and carcass performance of a large set of feeder steers are simulated employing a dynamic and deterministic bio-physical growth model adapted from the animal science literature. The cattle feeder and the owner's stochastic costs and returns under alternative production technologies and market conditions are then calculated by combining cattle performance data with historical price data. The main finding of this study is that the yardage fee contract is optimal for the cattle owner when the fed cattle are to be priced on the grid and the cost of gain contract is optimal when the cattle are to be marketed according to the live or dressed weight pricing methods.
The Excitation Conditions of CN in TW Hya
Creators: name: Teague, Richard
name: Loomis, Ryan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We report observations of the cyanide anion, CN, in the disk around TW~Hya covering the $N=1-0$, $N=2-1$ and $N=3-2$ transitions. Using line stacking techniques, 24 hyperfine transitions are detected out of the 30 within the observed frequency ranges. Exploiting the super-spectral resolution from the line stacking method reveals the splitting of hyperfine components previously unresolved by laboratory spectroscopy. All transitions display a similar emission morphology, characterized by an azimuthally symmetric ring, peaking at $\approx 45$~au (0.75"), and a diffuse outer tail extending out to the disk edge at $\approx 200$~au. Excitation analyses assuming local thermodynamic equilibrium (LTE) yield excitation temperatures in excess of the derived kinetic temperatures based on the local line widths for all fine structure groups, suggesting assumptions of LTE are invalid. Using the 0D radiative transfer code RADEX, we demonstrate that such non-LTE effects may be present when the local H$_2$ density drops to $10^{7}~{\rm cm^{-3}}$ and below. Comparison with models of TW~Hya find similar densities at elevated regions in the disk, typically $z \, / \, r \gtrsim 0.2$, consistent with model predictions where CN is formed via vibrationally excited H$_2$ in the disk atmospheric layers where UV irradiation is less attenuated.
description: Accepted to ApJ
Gaps below strange star crusts
Creators: name: Stejner, Morten
name: Madsen, Jes
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The gap caused by a strong electric field between the quark surface and nuclear crust of a strange star is studied in an improved model including gravity and pressure as well as electrostatic forces. The transition from gap to crust is followed in detail. The properties of the gap are investigated for a wide range of parameters assuming both color-flavor locked and non color-flavor locked strange star cores. The maximally allowed crust density is generally lower than that of neutron drip. Finite temperature is shown to increase the gap width, but the effect is significant only at extreme temperatures. Analytical approximations are derived and shown to provide useful fits to the numerical results.
description: 12 pages incl. 14 figures. To appear in Physical Review D
AI-Augmented Multi Function Radar Engineering with Digital Twin: Towards Proactivity
Creators: name: Klein, Mathieu
name: Carpentier, Thomas
name: Jeanclaude, Eric
name: Kassab, Rami
name: Varelas, Konstantinos
name: de Bruijn, Nico
name: Barbaresco, Frédéric
name: Briheche, Yann
name: Semet, Yann
name: Aligne, Florence
Publisher: name: arXiv
Year: 2020
Subjects: subject: Signal Processing (eess.SP)
subject: Robotics (cs.RO)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Thales new generation digital multi-missions radars, fully-digital and software-defined, like the Sea Fire and Ground Fire radars, benefit from a considerable increase of accessible degrees of freedoms to optimally design their operational modes. To effectively leverage these design choices and turn them into operational capabilities, it is necessary to develop new engineering tools, using artificial intelligence. Innovative optimization algorithms in the discrete and continuous domains, coupled with a radar Digital Twins, allowed construction of a generic tool for "search" mode design (beam synthesis, waveform and volume grid) compliant with the available radar time budget. The high computation speeds of these algorithms suggest tool application in a "Proactive Radar" configuration, which would dynamically propose to the operator, operational modes better adapted to environment, threats and the equipment failure conditions.
OPTIMAL CONTROL OF PROPERTY RIGHT OF RESOURCES WHEN TWO EXTERNALITIES (ENVIRONMENTAL PROPERTY RIGHT DISTORTION AND PRODUCTION POLLUTION DISTORTION) CO-EXIST: THE SMALL ECONOMY CASE
Creators: name: Tang, Xiaoyu
name: Tang, Xiaoyu
Publisher: name: Unknown
Year: 2003
Subjects: Environmental Economics and Policy
Resource /Energy Economics and Policy

description: Few studies investigate how environmental property right and production pollution distortions influence the economy when these two externalities co-exist. This case falls into a standard "second best theory". That is, it is important that pollution control policy should be coordinated with the reduction of environmental distortions. Given the non-linearity of production pollution distortion, the optimal property right may not be perfect. To guarantee the achievement of optimal total income via optimal property right, the monitoring agency should take into account the whole system and enforce different monitoring mechanisms in diversified situations. Empirical analysis is proposed on the reef fishery of Pacific island economies and the world.
Chern-Simons formulation of three-dimensional gravity with torsion and nonmetricity
Creators: name: Cacciatori, Sergio L.
name: Caldarelli, Marco M.
name: Giacomini, Alex
name: Klemm, Dietmar
name: Mansi, Diego S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We consider various models of three-dimensional gravity with torsion or nonmetricity (metric affine gravity), and show that they can be written as Chern-Simons theories with suitable gauge groups. Using the groups ISO(2,1), SL(2,C) or SL(2,R) x SL(2,R), and the fact that they admit two independent coupling constants, we obtain the Mielke-Baekler model for zero, positive or negative effective cosmological constant respectively. Choosing SO(3,2) as gauge group, one gets a generalization of conformal gravity that has zero torsion and only the trace part of the nonmetricity. This characterizes a Weyl structure. Finally, we present a new topological model of metric affine gravity in three dimensions arising from an SL(4,R) Chern-Simons theory.
description: 24 pages, uses JHEP3.cls. Published version
Dynamics of thermoelastic thin plates: A comparison of four theories
Creators: name: Norris, Andrew N.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Four distinct theories describing the flexural motion of thermoelastic thin plates are compared. The theories are due to Chadwick, Lagnese and Lions, Simmonds, and Norris. Chadwick's theory requires a 3D spatial equation for the temperature but is considered the most accurate as the others are derivable from it by different approximations. Attention is given to the damping of flexural waves. Analytical and quantitative comparisons indicate that the Lagnese and Lions model with a 2D temperature equation captures the essential features of the thermoelastic damping, but contains systematic inaccuracies. These are attributable to the approximation for the first moment of the temperature used in deriving the Lagnese and Lions equation. Simmonds' model with an explicit formula for temperature in terms of plate deflection is the simplest of all but is accurate only at low frequency, where the damping is linearly proportional to the frequency. It is shown that the Norris model, which is almost as simple as Simmond's, is as accurate as the more precise but involved theory of Chadwick.
description: 2 figures, 1 table
Surface tension in bilayer membranes with fixed projected area
Creators: name: Imparato, Alberto
Publisher: name: arXiv
Year: 2005
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We study the elastic response of bilayer membranes with fixed projected area to both stretching and shape deformations. A surface tension is associated to each of these deformations. By using model amphiphilic membranes and computer simulations, we are able to observe both the types of deformation, and thus, both the surface tensions, related to each type of deformation, are measured for the same system. These surface tensions are found to assume different values in the same bilayer membrane: in particular they vanish for different values of the projected area. We introduce a simple theory which relates the two quantities and successfully apply it to the data obtained with computer simulations.
Superconducting Proximity Effect through a Magnetic Domain Wall
Creators: name: Konstandin, Alexander
name: Kopu, Juha
name: Eschrig, Matthias
Publisher: name: arXiv
Year: 2005
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We study the superconducting proximity effect in a superconductor-ferromagnet-superconductor (SFS) heterostructure, containing a domain wall in the ferromagnetic region. For the ferromagnet we assume an alloy with an exchange splitting of the conduction bands comparable to the superconducting gaps. We calculate the modification of the density of states in the center of the domain wall as a result of the proximity effect. We show that the density of states is sensitive to domain wall parameters due to triplet-pairing correlations created in vicinity of the domain wall. We present a theoretical tool which in a very effective way enables retaining the full spatially dependent spin-space structure of the problem.
description: 4 pages, 4 figures
EHDEN - D4.4 - Report on educational and training material for the developed analytical tools
Creators: name: Hughes, Nigel
name: John, Henrik
name: Rijnbeek, Peter
Publisher: name: Zenodo
Year: 2020
Subjects: Academy
Education
Training
Open calls
Courses

description: The EHDEN Project aspires to educate, via the EHDEN Academy, project colleagues and all relevant external stakeholders within Europe (and beyond), in particular the wider OHDSI global network as a key collaboration community supporting this. It is noteworthy that such bodies as the European Medicines Agency, and the European Commission itself highlight the need for upskilling in this domain and the opportunity for educational resources. Initially, the aim was to train selected Small and Medium-Sized Enterprises (SMEs) selected through our open call process to ensure a consistent methodology for the mapping (ETL) of Data Partner source data to the OMOP common data model. This has led to the establishment of the EHDEN Academy, a Moodle-based, open-source platform. Six modules were created in 2019 as a basis for the initial curriculum and learning path, focused on SMEs. However, these courses are also of great value for others in the community. The EHDEN Academy has been successfully used in training the 26 SMEs in the first two open calls, and more will be trained in further calls over the duration of the EHDEN project. To enhance the project’s offering, the educational content was launched publicly on 23rd April 2020 with a plan to expand the courses and material for a wider audience, inclusive of Data Partners, researchers, regulators, HTA bodies, and anyone conducting observational research. Additional courses are being produced and content expanded. Uptake of the Academy has been positive, and the curriculum will be widened with learning paths and modules through the remainder of 2020 and beyond to support observational health research on a wider scale. An Executive Board, Project Management Team and Faculty have been established to operate the Academy, with representation from Academic and EFPIA partners, as well as OHDSI colleagues. A sustainability plan for the Academy is being developed, focusing on scenarios for community expansion and financial scenarios for independent continuance alongside the EHDEN project.
Temperature effects on the Schistocephalus solidus life cycle
Creators: name: Berkhout, Boris W.
Publisher: name: University of Leicester
Year: 2020
Subjects: Uncategorized

description: Changing environments are affecting individual species and the interactions between them. This includes host-parasite interactions. Although much is known about temperature effects on individual species, much progress is still to be made in understanding how complex parasite life cycles can be affected by changing temperatures. Here, several experimental approaches are presented to help study host-parasite interactions under changing temperatures. Using these experimental data on different stages of the Schistocephalus solidus under a range of temperatures are collected. Combined with (re-analysed) literature data and these newly collected data are inputted into a mathematical model that is constructed to simulate the whole life cycle. These different studies show that most parts of the parasite life cycle respond in a domeshaped fashion to changing temperatures with optimum temperature higher than current means. Overall, densities of the different life stages of S. solidus do not appear to be strongly affected by changes in mean temperature when including different, antagonistic effects on each life stage using a mathematical modelling approach.
A robust linear program solver for projectahedra
Creators: name: Laza, Marius
Publisher: name: University of British Columbia
Year: 2009

description: Linear programming has a wide range of applications, optimization-related problems being one of them. Important concerns in linear programming are efficiency, robustness, and accuracy. Linear programming is used in a reachability analysis tool called Coho [GM99] for dynamical systems. Previous experience has shown that linear programs in this tool lead to highly ill-conditioned linear systems which prevented successful reachability analysis. This thesis presents a robust linear program solver with provable error bounds that exploits the special structure of the linear programs that result in the reachability tool. This contribution is of interest for the particular application for which it was developed. Furthermore, it shows how duality and combinatorial aspects of linear programming can be exploited to achieve greater efficiency, robustness, and accuracy.
DOES THE FARM SECTOR HAVE A CRITICAL MASS?
Creators: name: Lynch, Lori
name: Carpenter, Janet
name: Lynch, Lori
name: Carpenter, Janet
Publisher: name: Unknown
Year: 2002
Subjects: Land Economics/Use

description: We examine if the farm sector has a critical mass. If a critical mass of farmland acres is needed to sustain a viable agricultural sector, agriculture profits may decline once a region has dropped below this threshold, causing the rate of farmland loss to accelerate. Agricultural census and population and housing census data were assembled as a panel by county and five-year time periods for the 50-year period (1949-1997) for six Mid-Atlantic States. Three random effects models were estimated. The general model indicates that having less than 189,240 harvested cropland acres accelerates a county's rate of farmland loss. As acres increase by 10% (5,400 acres), the 5-year loss rate decreases from the predicted 7.9% to 7.67%. As sales and percent change in income increase, the rate of farmland loss also decreases. The rate falls with the introduction of a preferential taxation program. As expenses, population density, percent change in total housing units, and percent unemployment increase, the rate of farmland loss accelerates. The rate accelerates if the county is metropolitan. Yet when the data is divided into an early (pre-1978) and late (post-1978) period, this threshold effect disappears in the later period. The earlier model's results are similar but in the later period, increases in population density and sales, increase the rate of loss. Conversely and counter-intuitively, as expenses increase, the rate of loss decreases. Apparently, even if a threshold existed, our results suggest it might dissipate overtime.
Ruijsenaars' hypergeometric function and the modular double of U_q(sl(2,C))
Creators: name: van de Bult, Fokko J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Algebra (math.QA)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 33D80

description: Simultaneous eigenfunctions of two Askey-Wilson second order difference operators are constructed as formal matrix coefficients of the principal series representation of the modular double of the quantized universal enveloping algebra U_q(sl(2,C)). These eigenfunctions are shown to be equal to Ruijsenaars' hypergeometric function under a proper parameter correspondence.
description: Replaced to synchronize formula numbers with the published version. 25 pages
DO PROFESSIONAL TRADERS EXHIBIT MYOPIC LOSS AVERSION? AN EXPERIMENTAL ANALYSIS
Creators: name: Haigh, Michael S.
name: List, John A.
name: Haigh, Michael S.
name: List, John A.
Publisher: name: Unknown
Year: 2002
Subjects: subject: Marketing
subject: FOS: Economics and business

description: Two behavioral concepts, loss aversion and mental accounting, have recently been combined to provide a theoretical explanation of the equity premium puzzle. Recent experimental evidence suggests that undergraduate students' behavior is consistent with this "myopic loss aversion" conjecture. Our suspicion is that, much like certain anomalies in the realm of riskless decisions, these behavioral tendencies will be severely attenuated when real market players are put to the task. Making use of a unique subject pool-professional futures and options pit traders recruited from the Chicago Board of Trade-we do find behavioral differences between professionals and students. Yet, rather than discovering that the anomaly disappears, the data suggest that professional traders exhibit myopic loss aversion to a greater extent than undergraduate students.
EHDEN - D4.6 - Final version of the Framework for quality benchmarking
Creators: name: Blacketer, Clair
name: Rijnbeek, Peter
name: Speybroeck, Michel Van
name: Moinat, Maxim
Publisher: name: Zenodo
Year: 2021
Subjects: Quality
Data Quality Dashboard
OMOP

description: The Data Quality Dashboard (DQD) developed as part of EHDEN Work Package 4 provides a comprehensive, customizable, and transparent way to both evaluate and communicate the quality of an OMOP CDM instance. It provides the code to run data quality checks against an OMOP CDM instance, and a way to visualize the results in a web application. The DQD is described in deliverable 4.2; this deliverable provides an update on progress and details of what was achieved in year two. Each Data Partner runs the Data Quality Dashboard on the data at their site once it is converted to the OMOP CDM. Initially, it has been used to assess whether OMOP Standards such as primary key constraints and concept domain restrictions are being followed. Thinking specifically of the EHDEN federated network, providing an interactive data quality report for each participating site provides evidence not only that OMOP specifications were followed correctly but also demonstrates that the necessary due diligence was performed to ensure that the data are of research quality. As the EHDEN network continues to grow and more Data Partners are at the point where they can run the DQD tool on their data we have been able to use it to assess adherence to CDM standards and readiness for network research. Such practical application will lead to continued innovation as we have already seen during year two. During the recent Rapid Collaboration Call for COVID-19 data sources, the DQD has been invaluable, providing insight into issues during the extract, transform, and load process and even serving as an education tool to disseminate standards and expectations. The DQD has already been widely adopted across multiple observational health networks in addition to EHDEN. The National COVID Cohort Collaborative1, funded by the US National Institutes of Health, is building a comprehensive database of COVID patients from across the US. They employ the tool during their data ingestion and harmonization process to assess data as it is received. The US FDA Biologics Effectiveness and Safety System2 uses the DQD to evaluate data quality prior to engaging in observational research. Similarly, the OHDSI community has begun to require Data Partners to run the tool prior to participation in network research. In response to this support and usage a publication is in production to fully describe the tool and to increase dissemination. The DQD has proven to be a strong foundation for data quality reporting and a key tool to ensure confidence in the evidence generated through the EHDEN federated network and beyond.
A Photonic Atom Probe coupling 3D Atomic Scale Analysis with in situ Photoluminescence Spectroscopy
Creators: name: Houard, Jonathan
name: Normand, Antoine
name: Di Russo, Enrico
name: Bacchi, Christian
name: Dalapati, Pradip
name: Beainy, Georges
name: Moldovan, Simona
name: Da Costa, Gerald
name: Delaroche, Fabien
name: Vaudolon, Charly
name: Chauveau, Jean Michel
name: Hugues, Maxime
name: Blavette, Didier
name: Deconihout, Bernard
name: Vella, Angela
name: Vurpillot, François
name: Rigutti, Lorenzo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: Laser enhanced field evaporation of surface atoms in Laser-assisted Atom Probe Tomography (La-APT) can simultaneously excite phtotoluminescence in semiconductor or insulating specimens. An atom probe equipped with appropriate focalization and collection optics has been coupled with an in-situ micro-Photoluminescence (μPL) bench that can be operated during APT analysis. The Photonic Atom Probe instrument we have developped operates at frequencies up to 500 kHz and is controlled by 150 fs laser pulses tunable in energy in a large spectral range (spanning from deep UV to near IR). Micro-PL spectroscopy is performed using a 320 mm focal length spectrometer equipped with a CCD camera for time-integrated and with a streak camera for time-resolved acquisitions. An exemple of application of this instrument on a multi-quantum well oxide heterostructure sample illustrates the potential of this new generation of tomographic atom probe.
description: 22 pages, 4 figures. The following article has been accepted by the Review of Scientific Instruments. After it is published, it will be found at https://publishing.aip.org/resources/librarians/products/journals/
Looking for Light Pseudoscalar Bosons in the Binary Pulsar System J0737-3039
Creators: name: Dupays, Arnaud
name: Rizzo, Carlo
name: Roncadelli, Marco
name: Bignami, Giovanni F.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present numerical calculations of the photon-light-pseudoscalar-boson conversion in the recently discovered binary pulsar system J0737-3039. Light pseudoscalar bosons (LPBs) oscillate into photons in the presence of strong magnetic fields. In the context of this binary pulsar system, this phenomenon attenuates the light beam emitted by one of the pulsars, when the light ray goes through the magnetosphere of the companion pulsar. We show that such an effect is observable in the gamma-ray band since the binary pulsar is seen almost edge-on, depending on the value of the LPB mass and on the strenght of its two-photon coupling. Our results are surprising in that they show a very sharp and significant (up to 50%) transition probability in the gamma-ray ($>$ tens of MeV) domain. The observations can be performed by the upcoming NASA GLAST mission.
description: to appear in Phys. Rev. Lett
Pottery, Practices and Boundaries in Early Bronze Age Sicily (ca 2300-1500 BC)
Creators: name: Cantisani, Matteo
Publisher: name: University of Leicester
Year: 2020
Subjects: Uncategorized

description: This thesis is a detailed study of painted and unpainted pottery in Castelluccio ceramic assemblages in Early Bronze Age Sicily (2300-1500 BC). The aim is not to perpetuate current definitions of static, culture-bearing regional grouping. Instead, the aim of my work is to explore morphometric variability as a representation of social boundaries and practices. The main purpose of such a work is to link material culture with society. So far, this task has remained a neglected topic in Sicilian EBA specialist studies, while current models of socio-cultural transformations rely on external sources as main drivers for local developments. My work will open up alternative understanding of local developments emphasising the centrality and embeddedness of material culture in mechanisms of socio-cultural reproduction as needed, initiating a broader re-assessement of Castelluccio cultural groupings and social organisation.