cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Raman scattering studies of temperature- and field-induced melting of charge order in (La,Pr,Ca)MnO$_{3}$
Creators: name: Kim, M.
name: Barath, H.
name: Cooper, S. L.
name: Abbamonte, P.
name: Fradkin, E.
name: Rübhausen, M.
name: Zhang, C. L.
name: Cheong, S-W.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present Raman scattering studies of the structural and magnetic phases that accompany temperature- and field-dependent melting of charge- and orbital-order (COO) in La0.5Ca0.5MnO3 and La0.25Pr0.375Ca0.375MnO3. Our results show that thermal and field-induced COO melting in La0.5Ca0.5MnO3 exhibits three stages in a heterogeneous melting process associated with a structural change: a long-range, strongly JT distorted/COO regime; a coexistence regime; and weakly JT distorted/PM or FM phase. We provide a complete structural phase diagram of La0.5Ca0.5MnO3 for the temperature and field ranges 6<=T<=170 K and 0<=H<=9 T. We also investigate thermal and field-induced melting in La0.25Pr0.375Ca0.375MnO3 to elucidate the role of disorder in melting of COO. We find that while thermal melting of COO in La0.25Pr0.375Ca0.375MnO3 is quite similar to that in La0.5Ca0.5MnO3, the field-induced transition from the COO phase to the weakly JT-distorted/FM phase in La0.25Pr0.375Ca0.375MnO3 is very abrupt, and occurs at significantly lower fields (H~2 T at T~0 K) than in La0.5Ca0.5MnO3 (H~30 T at T=0 K). Moreover, the critical field H_c increases with increasing temperature in La0.25Pr0.375Ca0.375MnO3 in contrast to La0.5Ca0.5MnO3. To explain these differences, we propose that field-induced melting of COO in La0.25Pr0.375Ca0.375MnO3 is best described as the field-induced percolation of FM domains, and we suggest that Griffiths phase physics may be an appropriate theoretical model for describing the unusual temperature- and field- dependent transitions observed in La0.25Pr0.375Ca0.375MnO3.
description: 14 pages, 8 figures, to be published in PRB
Warehouse Location Decision and Calibration with Deep Learning Models
Creators: name: De La Cruz, Antonio
name: Cvancara, Carmen
name: Terrier, Yvonne
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 460104
subject: Applications in physical sciences

description: This paper explores the use of deep learning models, particularly Graph Neural Networks (GNNs), in optimizing the warehouse location decision-making process. This approach modifies the standard learning and objectives of GNNs to solve the warehouse location problem, a classic example of facility location optimization. The study presents a novel application of machine learning, transitioning from traditional optimization techniques towards leveraging data-driven models. Through empirical analysis, the proposed model demonstrates enhanced decision-making capabilities, offering promising results in terms of efficiency and precision. The study concludes with potential future research directions, emphasizing further exploration into the integration of deep learning in solving combinatorial optimization problems.
Organic certification systems and international trading of agricultural products in gravity models
Creators: name: Cantore, Nicola
name: Canavari, Maurizio
name: Pignatti, Erika
name: Cantore, Nicola
name: Canavari, Maurizio
name: Pignatti, Erika
Publisher: name: Unknown
Year: 2008
Subjects: subject: Agricultural and Food Policy
subject: Research Methods/ Statistical Methods
subject: Gravity models
subject: organic standards
subject: transaction costs
subject: international market
subject: agricultural trade
subject: food products

description: Recent literature about gravity models points out the importance of institutional frictions in the international market of agricultural products beyond the traditional economics variables as transport costs reducing the mass of trade in bilateral relationships. In particular, previous contributions stress that harmonization of food standards could decrease transaction costs in trading relationships by stimulating international market. In a previous work we hypothesized that the acknowledgment of equivalence in organic standards may represent a reliable signal of affinity in bilateral relationships which may be useful to identify areas in which transaction costs for both conventional and organic standards are lower. This article represents a step forward, since it assumes that the acknowledgment of equivalence in identifying areas with lower transaction costs in trading relationships for the whole produce could be a strong assumption that may be relaxed through the hypothesis that affinity in market exchange could be simply signaled by the presence of organic standards for the involved countries. Therefore, in our analysis we test if countries setting specific rules for organic standards are more “affine” in trading relationships because of a low common cultural, law and political distance but also if differences in organic standards themselves can be useful to differentiate the level of affinity among regions. Interesting insights for policy makers about the identification of relevant variables for international business arise from an econometric analysis.
The Mellin moments $\langle x \rangle$ and $\langle x^2 \rangle$ for the pion and kaon from lattice QCD
Creators: name: Alexandrou, Constantia
name: Bacchio, Simone
name: Cloet, Ian
name: Constantinou, Martha
name: Hadjiyiannakou, Kyriakos
name: Koutsou, Giannis
name: Lauer, Colin
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a calculation of the pion quark momentum fraction, $\langle x \rangle$, and its third Mellin moment $\langle x^2 \rangle$. We also obtain directly, for the first time, $\langle x \rangle$ and $\langle x^2 \rangle$ for the kaon using local operators. We use an ensemble of two degenerate light, a strange and a charm quark ($N_f=2+1+1$) of maximally twisted mass fermions with clover improvement. The quark masses are chosen so that they reproduce a pion mass of about 260 MeV, and a kaon mass of 530 MeV. The lattice spacing of the ensemble is 0.093 fm and the lattice has a spatial extent of 3 fm. We analyze several values of the source-sink time separation within the range of $1.12-2.23$ fm to study and eliminate excited-states contributions. The necessary renormalization functions are calculated non-perturbatively in the RI$'$ scheme, and are converted to the $\overline{\rm MS}$ scheme at a scale of 2 GeV. The final values for the momentum fraction are $\langle x \rangle^π_{u^+}=0.261(3)_{\rm stat}(6)_{\rm syst}$, $\langle x \rangle^K_{u^+}=0.246(2)_{\rm stat}(2)_{\rm syst}$, and $\langle x \rangle^K_{s^+}=0.317(2)_{\rm stat}(1)_{\rm syst}$. For the third Mellin moments we find $\langle x^2 \rangle^π_{u^+}=0.082(21)_{\rm stat}(17)_{\rm syst}$, $\langle x^2 \rangle^K_{u^+}=0.093(5)_{\rm stat}(3)_{\rm syst}$, and $\langle x^2 \rangle^K_{s^+}=0.134(5)_{\rm stat}(2)_{\rm syst}$. The reported systematic uncertainties are due to excited-state contamination. We also give the ratio $\langle x^2 \rangle/\langle x \rangle$ which is an indication of how quickly the PDFs lose support at large $x$.
description: 21 pages, 10 figures
Valuing potential benefits of weed biocontrol research: a study of Californian thistle on New Zealand lowland intensive sheep farms
Creators: name: Kaye-Blake, William
name: Bourdot, Graeme
name: Bhubaneswor, Dhakal
name: Kaye-Blake, William
name: Bourdot, Graeme
name: Bhubaneswor, Dhakal
Publisher: name: Unknown
Year: 2008
Subjects: Crop Production/Industries

description: A novel bioeconomic model is used to value the potential benefits of biocontrol research into Californian thistle.
description: Replaced with revised version of poster 8/13/08.
Changes in the carabid beetle community of the Sicamous Creek research site in response to prescribed logging practices
Creators: name: Lavallee, Susanne L.
Publisher: name: University of British Columbia
Year: 2009

description: Carabid beetles (Order Coleoptera, Family Carabidae) are an important part of forest diversity and play a role in assessing forest health. This study is an important advancement in the study of carabid beetles in the environment as it is the first to continuously sample a population in pre-treatment and post-treatment states. Changes within the carabid assemblage were monitored as different harvesting regimes were applied. The five treatments examined were: 10, 1.0, and 0.1 hectare clearcuts, 25% Individual Tree Selection (I.T.S.) and controls (uncut). Results showed that species richness increased within clearcut habitats for all treatments, but not necessarily within forested and edge habitat for all treatments. Edge habitat richness was lower in some treatments. Species diversity indices showed similar changes for these habitats. Species evenness analysis showed that forest and clearcut habitats are dominated by a few species, but that edge habitat has a more even hierarchy. No differences in habitat use were detected for most species, except for a few "new" species (ones that appeared after logging occurred). For Scaphinotus angusticollis (Fischer Von Waldheim) there was a significant drop in abundance in 25% I.T.S. plots after harvesting as compared to 0.1 hectare plots, indicating that some undisturbed forest habitat is required by this species.
The Dynamics of Learning: An Economic Model of Student Motivation and Achievement
Creators: name: Barkley, Andrew P.
name: Barkley, Andrew P.
Publisher: name: Unknown
Year: 2008
Subjects: Teaching/Communication/Extension/Profession

description: This research presents the results of a mathematical model of learning, to identify the major determinants of a productive and successful learning environment for college-level students. The driving force of the research is the relationship between: (1) student capacity for learning (ability), and (2) the opportunity to learn provided by the instructor (challenge). The dynamic relationship between ability and challenge leads to the most effective steady state rate of knowledge acquisition (learning). Implications for both students and teachers are derived and explored, including the proposition that a stable and sustainable rate of learning occurs when ability and challenge are congruent.
Gamma-ray and neutrino emission from misaligned microquasars
Creators: name: Romero, Gustavo E.
name: Orellana, Mariana
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Microquasars are accreting X-ray binary systems with non-thermal radio jets. In some of these systems the jet is expected to be strongly misaligned with the perpendicular to the orbital plane. If the donor star is an early-type star, the jet could collide with the stellar wind producing a standing shock between the compact object and the stellar surface. Relativistic particles injected by the jet can be re-accelerated and isotropized at the colliding region. If the jet has hadronic content, TeV protons will diffuse into the inner, dense wind leading to gamma-ray and neutrino production from interactions with the matter of the wind. In the case of very powerful jets, the wind pressure can be overbalanced and the jet might impact directly onto the stellar surface. We present estimates of the gamma-ray and neutrino luminosities for different sets of parameters in these scenarios and we briefly discuss the effects of this radiation on the donor star and its detectability with current instruments.
description: 8 pages, 2 figures, accepted for publication in A&A
Economics analysis of mitigation strategies for FMD introduction in highly concentrated animal feeding regions
Creators: name: Elbakidze, Levan
name: Highfield, Linda
name: Ward, Michael P.
name: McCarl, Bruce A.
name: Norby, Bo
name: Elbakidze, Levan
name: Highfield, Linda
name: Ward, Michael P.
name: McCarl, Bruce A.
name: Norby, Bo
Publisher: name: Unknown
Year: 2008
Subjects: Livestock Production/Industries

description: Outbreaks of infectious animal diseases can lead to substantial losses as evidenced by 2003 US BSE (Bovine Spongiform Encephalopathy) event with consequent loss of export markets, and the 2001 UK FMD (Foot and Mouth Disease) outbreak that has cost estimates in the billions. In this paper we present a linked epidemiologic-economic modeling framework which is used to investigate several FMD mitigation strategies under the context of an FMD outbreak in a concentrated cattle feeding region in the US. In this study we extend the literature by investigating the economic effectiveness of some previously unaddressed strategies including early detection, enhanced vaccine availability, and enhanced surveillance under various combinations of slaughter, surveillance, and vaccination. We also consider different disease introduction points at a large feedlot, a backgrounder feedlot, a large grazing herd, and a backyard herd all in the Texas High Plains. In terms of disease mitigation strategies we evaluate the economic effectiveness of: 1. Speeding up initial detection by one week from day 14 to day 7 after initial infection; 2. Speeding up vaccine availability from one week post disease detection to the day of disease detection; 3.Doubling post event surveillance intensity. To examine the economic implications of these strategies we use a two component stochastic framework. The first component is the epidemiologic model that simulates the spread of FMD as affected by control policies and introduction scenarios. The second component is an economics module, which calculates an estimate of cattle industry losses plus the costs of implementing disease control. The results show that early detection of the disease is the most effective mechanism for minimizing the costs of outbreak. Under some circumstances enhanced surveillance also proved to be an effective strategy.
Definition and properties of logopoles of all degrees and orders
Creators: name: Majic, Matt
name: Ru, Eric C. Le
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mathematical Physics (math-ph)
subject: Analysis of PDEs (math.AP)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Logopoles are a recently proposed class of solutions to Laplace's equation with intriguing links to both solid spheroidal and solid spherical harmonics. They share the same finite line singularity with the former and provide a generalization of the latter as multipoles of negative order. In [Phys. Rev. Res. 1, 033213 (2019)], we introduced and discussed the properties and applications of these new functions in the special case of axi-symmetric problems (with azimuthal index $m=0$). This allowed us to focus on the physical properties without the added mathematical complications. Here we expand these concepts to the general case $m\neq 0$. The chosen definitions are motivated to conserve some of the most interesting properties of the $m=0$ case. This requires the inclusion of Legendre functions of the second kind with degree $-m\leq n
Food insecurity and childhood obesity: beyond categorical and linear representations
Creators: name: Kuku-Shittu, Oluyemisi
name: Gundersen, Craig
name: Garasky, Steven B.
name: Kuku-Shittu, Oluyemisi
name: Gundersen, Craig
name: Garasky, Steven B.
Publisher: name: Unknown
Year: 2008
Subjects: Food Consumption/Nutrition/Food Safety
Food Security and Poverty

description: Previous work on the relationship between food insecurity and childhood overweight has lead to a wide array of answers – some have found a positive relationship, others no relationship, and still others a negative relationship. This previous work has shared one thing in common – all have used parametric models. In this paper we move beyond parametric models by using non-parametric models. With data from the 1999-2002 National Health and Nutrition Examination Survey (NHANES) and a wide array parametric methods, we find evidence across different samples of a positive relationship, no relationship, and a negative relationship between childhood overweight and food insecurity. When we turn to non-parametric methods, however, this ambiguity across samples is not as prevalent. Instead, across different samples, we find (a) increases in the probability of food insecurity in the middle of the BMI distribution, (b) increases in the probability at the very high end of the BMI, and (c) no relationship across the entire distribution. We present some parametric models that roughly mimic these relationships. Our results indicate that efforts to reduce food insecurity will either have no impact on childhood overweight or would lead to reductions in childhood overweight.
Generating controllable atom-light entanglement with a Raman atom laser system
Creators: name: Haine, S. A.
name: Olsen, M. K.
name: Hope, J. J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We introduce a scheme for creating continuous variable entanglement between an atomic beam and an optical field, by using squeezed light to outcouple atoms from a BEC via a Raman transition. We model the full multimode dynamics of the atom laser beam and the squeezed optical field, and show that with appropriate two-photon detuning and two-photon Rabi frequency, the transmitted light is entangled in amplitude and phase with the outcoupled atom laser beam. The degree of entanglement is controllable via changes in the two-photon Rabi frequency of the outcoupling process.
description: 4 pages, 4 figures
CONCEPÇÃO DO SAGRADO NA PERSPECTIVA AMBIENTAL E A  RELAÇÃO HUMANO/NÃO-HUMANO EM BICHOS, DE MIGUEL TORGA E  VIDAS SECAS DE GRACILIANO RAMOS
Creators: name: Almeida, Maria do Socorro Pereira de
Publisher: name: SABEH
Year: 2023
Subjects: Humano
Sagrado
Meio Ambiente

description: O texto traz algumas observações sobre as perspectivas ambientais nas obras Bichos, de Miguel Torga e Vidas Secas, de Graciliano Ramos, tentando ver como se revela a concepção de sagrado nessas obras, especialmente através do conto Jesus, da obra torguiana e do episódio Inverno de Vidas Secas. Contamos com o embasamento teórico e crítico de estudos literários, teológicos, ambientais e filosóficos e pudemos observar que os textos aludem ao sagrado através de simbologias representadas pela natureza externa e pelo comportamento e ações humanas emrelação ao não-humano, e que as obras, cada uma a sua maneira, trazem a inserção do homem em si mesmo, chama-o a olhar para sua maneira de ver a vida e, principalmente, de vivê-la consigo e com o outro.
Searching for O$_2$ in the SMC:Constraints on Oxygen Chemistry at Low Metallicities
Creators: name: Wilson, C. D.
name: Olofsson, A. O. H.
name: Pagani, L.
name: Booth, R. S.
name: Frisk, U.
name: Hjalmarson, A.
name: Olberg, M.
name: Sandqvist, Aa.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a 39 h integration with the Odin satellite on the ground-state 118.75 GHz line of O2 towards the region of strongest molecular emission in the Small Magellanic Cloud. Our 3sigma upper limit to the O2 integrated intensity of <0.049 K km/s in a 9'(160 pc) diameter beam corresponds to an upper limit on the O2/H2 abundance ratio of <1.3E-6. Although a factor of 20 above the best limit on the O2 abundance obtained for a Galactic source, our result has interesting implications for understanding oxygen chemistry at sub-solar metal abundances. We compare our abundance limit to a variety of astrochemical models and find that, at low metallicities, the low O2 abundance is most likely produced by the effects of photo-dissociation on molecular cloud structure. Freeze-out of molecules onto dust grains may also be consistent with the observed abundance limit, although such models have not yet been run at sub-solar initial metallicities.
description: 4 pages, accepted to A&A Letters
InstructG2I: Synthesizing Images from Multimodal Attributed Graphs
Creators: name: Jin, Bowen
name: Pang, Ziqi
name: Guo, Bingjun
name: Wang, Yu-Xiong
name: You, Jiaxuan
name: Han, Jiawei
Publisher: name: arXiv
Year: 2024
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Computation and Language (cs.CL)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences

description: In this paper, we approach an overlooked yet critical task Graph2Image: generating images from multimodal attributed graphs (MMAGs). This task poses significant challenges due to the explosion in graph size, dependencies among graph entities, and the need for controllability in graph conditions. To address these challenges, we propose a graph context-conditioned diffusion model called InstructG2I. InstructG2I first exploits the graph structure and multimodal information to conduct informative neighbor sampling by combining personalized page rank and re-ranking based on vision-language features. Then, a Graph-QFormer encoder adaptively encodes the graph nodes into an auxiliary set of graph prompts to guide the denoising process of diffusion. Finally, we propose graph classifier-free guidance, enabling controllable generation by varying the strength of graph guidance and multiple connected edges to a node. Extensive experiments conducted on three datasets from different domains demonstrate the effectiveness and controllability of our approach. The code is available at https://github.com/PeterGriffinJin/InstructG2I.
description: 16 pages
Off-farm Work, Technical Efficiency, and Production Risk: Empirical Evidence from a National Farmer Survey in Taiwan
Creators: name: Chang, Hung-Hao
name: Wen, Fang-I
name: Chang, Hung-Hao
name: Wen, Fang-I
Publisher: name: Unknown
Year: 2008
Subjects: subject: Crop Production/Industries
subject: Farm Management
subject: Off-farm work
subject: technical efficiency
subject: production risk
subject: Taiwan

description: The objective of this paper is to investigate the differences in yield production, production efficiency, and yield risk for farmers with and without off-farm work. Using a nationwide survey of Taiwanese rice farmers, we estimate a stochastic production frontier model accommodating the technical inefficiency and the production risk simultaneously. Applying the stochastic dominance criterion to rank the estimated technical efficiency and yield risk between professional farmers and farmers with off-farm jobs, our empirical analysis shows that off-farm work is significantly associated with lower technical efficiency. Additionally, farmers with off-farm work face higher production risks. Comparing the marginal effects of input uses on technical inefficiency and yield risk between these groups of farmers, we found a substantial heterogeneity of input uses between these two groups of farmers.
On the intersection of the curves through a set of points in P^2
Creators: name: Teitler, Zachariah C.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14C20

description: Given a set of points in P^2, we consider the common zeros of the set of curves of a given degree passing through those points. For general sets of points, these zero sets have the expected dimension and are smooth. In fact, given graded Betti numbers, for any arrangement of points whose ideal has those graded Betti numbers, general among such arrangements, the zero sets have the expected dimension and are smooth.
description: minor changes; final version, to appear in JPAA
Shallow NV centers augmented by exploiting n-type diamond
Creators: name: Watanabe, A.
name: Nishikawa, T.
name: Kato, H.
name: Fujie, M.
name: Fujiwara, M.
name: Makino, T.
name: Yamasaki, S.
name: Herbschleb, E. D.
name: Mizuochi, N.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Creation of nitrogen-vacancy (NV) centers at the nanoscale surface region in diamond, while retaining their excellent spin and optical properties, is essential for applications in quantum technology. Here, we demonstrate the extension of the spin-coherence time ($\it{T}$${_2}$), the stabilization of the charge state, and an improvement of the creation yield of NV centers formed by the ion-implantation technique at a depth of $\sim$15 nm in phosphorus-doped n-type diamond. The longest $\it{T}$${_2}$ of about 580 $μ$s of a shallow NV center approaches the one in bulk diamond limited by the nuclear spins of natural abundant $^{13}$C. The averaged $\it{T}$${_2}$ in n-type diamond is over 1.7 times longer than that in pure non-doped diamond. Moreover, the stabilization of the charge state and the more than twofold improvement of the creation yield are confirmed. The enhancements for the shallow NV centers in an n-type diamond-semiconductor are significant for future integrated quantum devices.
description: 21 pages, 5 figures, 1 table
Thermodynamics of the disordered Hubbard model studied via numerical linked-cluster expansions
Creators: name: Park, Jacob
name: Khatami, Ehsan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: The interplay of disorder and strong correlations in quantum many-body systems remains an open question. That is despite much progress made in recent years with ultracold atoms in optical lattices to better understand phenomena such as many-body localization or the effect of disorder on Mott metal-insulator transitions. Here, we utilize the numerical linked-cluster expansion technique, extended to treat disordered quantum lattice models, and study exact thermodynamic properties of the disordered Fermi-Hubbard model on the square and cubic geometries. We consider box distributions for the disorder in the onsite energy, the interaction strength, as well as the hopping amplitude and explore how energy, double occupancy, entropy, heat capacity and magnetic correlations of the system in the thermodynamic limit evolve as the strength of disorder changes. We compare our findings with those obtained from determinant quantum Monte Carlo simulations and discuss the relevance of our results to experiments with cold fermionic atoms in optical lattices.
description: 13 pages, 12 figures, same as the published version
Bundled Ecosystem Markets – Are They The Future?
Creators: name: Greenhalgh, Suzie
name: Greenhalgh, Suzie
Publisher: name: Unknown
Year: 2008
Subjects: subject: Environmental Economics and Policy
subject: bundled ecosystem markets
subject: market-based instruments
subject: policy
subject: trading
subject: ecosystem services
subject: markets

description: Bundled ecosystem markets may be the next big buzz in environmental policy and ecosystem conservation and restoration. But what does it mean? And what is the feasibility of these markets? While single service ecosystem markets are proliferating, bundled ecosystem markets are not. Using some ‘enabling’ and ‘operating’ conditions identified for various single ecosystem markets, I will see how these conditions hold as you move to bundled ecosystem markets. I also outline some of the hurdles that confront the development of bundled ecosystem markets and what may need to be reconciled to move these markets forward. This article is aimed at stimulating greater thinking and promoting more exploration by the policy and research community into the development of bundled ecosystem markets.
The young massive stellar cluster associated to RCW121
Creators: name: Roman-Lopes, Alexandre
name: Abraham, Zulema
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report NIR broad and narrow band photometric observations in the direction of the IRAS17149-3916 source that reveal the presence of a young cluster of massive stars embedded in an HII region coincident with RCW121. These observations, together with published radio data, MSX and Spitzer images were used to determine some of the physical parameters of the region. We found 96 cluster member candidates in an area of about 1.5 x 2.0 square arcmin, 30% of them showing excess emission in the NIR. IRS 1, the strongest source in the cluster with an estimated spectral type of O5V-O6V ZAMS based on the color-magnitude diagram, is probably the main ionizing source of the HII region detected at radio wavelengths. Using the integrated Brgamma and the 5 GHz flux densities, we derived a mean visual extinction AV=5.49 magnitudes. From the observed size of the Brgamma extended emission, we calculated the emission measure E and the electron density ne, characteristic of compact HII regions.
description: 18 pages, 8 figures, accepted for publication on AJ (February/2006)
An Autonomous Adaptive Scheduling Agent for Period Searching
Creators: name: Saunders, Eric S.
name: Naylor, Tim
name: Allan, Alasdair
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We describe the design and implementation of an autonomous adaptive software agent that addresses the practical problem of observing undersampled, periodic, time-varying phenomena using a network of HTN-compliant robotic telescopes. The algorithm governing the behaviour of the agent uses an optimal geometric sampling technique to cover the period range of interest, but additionally implements proactive behaviour that maximises the optimality of the dataset in the face of an uncertain and changing operating environment.
description: 5 pages, 2 figures, to appear in proceedings of Hot-wiring the Transient Universe (HTU) 2007, Astronomische Nachrichten, March 2008
Formal classification of unipotent parameterized diffeomorphisms
Creators: name: Ribón, Javier
Publisher: name: arXiv
Year: 2005
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37F75 (Primary), 32H02, 32S65, 32A05 (Secondary)

description: We provide a complete system of invariants for the formal classification of complex analytic unipotent germs of diffeomorphism at $\cn{n}$ fixing the orbits of a regular vector field. We reduce the formal classification problem to solve a linear differential equation. Then we describe the formal invariants; their nature depends on the position of the fixed points set $Fix ϕ$ with respect to the regular vector field preserved by $ϕ$. We get invariants specifically attached to higher dimension ($n \geq 3$) although generically they are analogous to the one-dimensional ones.
description: 35 pages
Spatiotemporal Modeling and Forecasting at Scale with Dynamic Generalized Linear Models
Creators: name: Pherwani, Pranay
name: Hass, Nicholas
name: Yanchenko, Anna K.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Methodology (stat.ME)
subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: Spatiotemporal data consisting of timestamps, GPS coordinates, and IDs occurs in many settings. Modeling approaches for this type of data must address challenges in terms of sensor noise, uneven sampling rates, and non-persistent IDs. In this work, we characterize and forecast human mobility at scale with dynamic generalized linear models (DGLMs). We represent mobility data as occupancy counts of spatial cells over time and use DGLMs to model the occupancy counts for each spatial cell in an area of interest. DGLMs are flexible to varying numbers of occupancy counts across spatial cells, are dynamic, and easily incorporate daily and weekly seasonality in the aggregate-level behavior. Our overall approach is robust to various types of noise and scales linearly in the number of spatial cells, time bins, and agents. Our results show that DGLMs provide accurate occupancy count forecasts over a variety of spatial resolutions and forecast horizons. We also present scaling results for spatiotemporal data consisting of hundreds of millions of observations. Our approach is flexible to support several downstream applications, including characterizing human mobility, forecasting occupancy counts, and anomaly detection for aggregate-level behaviors.
description: 12 pages, 12 figures
Neutron star parameter constraints for accretion-powered millisecond pulsars from the simulated IXPE data
Creators: name: Salmi, Tuomo
name: Loktev, Vladislav
name: Korsman, Karri
name: Baldini, Luca
name: Tsygankov, Sergey S.
name: Poutanen, Juri
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We have simulated the X-ray polarization data that can be obtained with the Imaging X-ray Polarimetry Explorer, when observing accretion-powered millisecond pulsars. We estimated the necessary exposure times for SAX J1808.4$-$3658 in order to obtain different accuracies in the measured time-dependent Stokes profiles integrated over all energy channels. We found that the measured relative errors depend strongly on the relative configuration of the observer and the emitting hotspot. The improvement in the minimum relative error in Stokes $Q$ and $U$ parameters as a function of observing time $t$ scales as $1/\sqrt{t}$, and spans the range from 30-90% with 200 ks exposure time to 20-60% with 500 ks exposure time (in case of data binned in 19 phase bins). The simulated data were also used to predict how accurate measurements of the geometrical parameters of the neutron star can be made when modelling only $Q$ and $U$ parameters, but not the flux. We found that the observer inclination and the hotspot co-latitude could be determined with better than 10 deg accuracy for most of the cases we considered. These measurements can be used to further constrain neutron star mass and radius when combined with modelling of the X-ray pulse profile.
description: 12 pages, 11 figures, published in A&A
Raimund Abraham Guest Lecture
Creators: name: Abraham, Raimund
Publisher: name: The University of Texas at Austin
Year: 0
Subjects: University of Texas at Austin. School of Architecture
Hejduk, John, 1929-2000
Texas Rangers (architects)
Slutzky, Robert
Hoesli, Bernhard
Rowe, Colin
Architecture, Modern--20th century
Johnson, Philip, 1906-2005
International style (Architecture)
Hitchcock, Henry-Russell, 1903-1987
Architecture, Postmodern
Deconstructivism (Architecture)
Ontology
Geometry in architecture
architectural drawing
Stirling, James (James Frazer)
Berlin (Germany)
Graz (Austria)
Internationale Bauausstellung Berlin
columns

description: Architectural projects and/or sites mentioned: Austrian Cultural Forum (Raimund Abraham, 1998-2002) (New York, New York, United States) ; Rainbow Center Plaza (Raimund Abraham, Giuliano Fiorenzoli, 1972-76) (Niagara Falls, New York) ; Raimund Abraham House (Raimund Abraham, 1985-87) (Berlin, Germany) ; Endless Column (Constantin Brâncuşi, 1938) (Târgu-Jiu, Romania)
description: Audio files are EID restricted. Individuals without an EID should send an email request to apl-aaa@lib.utexas.edu.
Multiplier ideals of general line arrangements in C^3
Creators: name: Teitler, Zachariah C.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14B05

description: We consider the multiplier ideals of the ideal of a reduced union of lines through the origin in C^3. For general arrangements of lines, we calculate the multiplier ideals.
description: 14 pages
$φ$enics: Vainshtein screening with the finite element method
Creators: name: Braden, Jonathan
name: Burrage, Clare
name: Elder, Benjamin
name: Saadeh, Daniela
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Within the landscape of modified theories of gravity, progress in understanding the behaviour of, and developing tests for, screening mechanisms has been hindered by the complexity of the field equations involved, which are nonlinear in nature and characterised by a large hierarchy of scales. This is especially true of Vainshtein screening, where the fifth force is suppressed by high-order derivative terms which dominate within a radius much larger than the size of the source, known as the Vainshtein radius. In this work, we present the numerical code $φ$enics, building on the FEniCS library, to solve the full equations of motion from two theories of interest for screening: a model containing high-order derivative operators in the equation of motion and one characterised by nonlinear self-interactions in two coupled scalar fields. We also include functionalities that allow the computation of higher-order operators of the scalar fields in post-processing, enabling us to check that the profiles we find are consistent solutions within the effective field theory. These two examples illustrate the different challenges experienced when trying to simulate such theories numerically, and we show how these are addressed within this code. The examples in this paper assume spherical symmetry, but the techniques may be straightforwardly generalised to asymmetric configurations. This article therefore also provides a worked example of how the finite element method can be employed to solve the screened equations of motion. $φ$enics is publicly available and can be adapted to solve other theories of screening.
description: 47 pages, 15 figures, v2: minor modifications to match version accepted by JCAP
Mantzaridis, Georg J.: Soziologie des Christentums
Creators: name: Savramis, Demosthenes
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 31 Nr. 3 (1982): Ökumenische Rundschau, Band 31, Heft 3
The relationship between works councils and firms’ further training provision in times of technological change
Creators: name: Lammers, Alexander
name: Lukowski, Felix
name: Weis, Kathrin
Publisher: name: TU Dortmund
Year: 2022
Subjects: subject: 330

description: Participating in further training is strategically important for employees to ensure their employability. Particularly for employees in low-skilled jobs, works councils — firm-level organizations that represent employees — constitute an important employee advocacy instrument in European countries, such as France and Germany. With comprehensive co-determination rights, works councils can influence firms’ hiring policies, job design and career paths (e.g. promotions). Using German firm-level data, we empirically investigate the influence of works councils on firms’ training provision for employees in firms below and above the industry level of technology. The results show that works councils have a positive effect on the percentage of employees in general, and of employees in low-skilled jobs in particular, participating in training, but only for firms below the industry level of technology. These results show the importance of works councils in supporting training in such firms and enhancing the employment prospects of employees in low-skilled jobs. In contrast, firms above the industry level of technology invest in training with or without a works council, indicating that the training interests of employers and employees are aligned.
description: British journal of industrial relations;61(2)
A Continental Method for Estimating the Supply and Import/ Export of Wheat
Creators: name: Kubo, Masayoshi
name: Xie, Jingci
name: Kubo, Masayoshi
name: Xie, Jingci
Publisher: name: Unknown
Year: 2006
Subjects: International Relations/Trade

description: Wheat is the principal food of about half of the world’s population. In the 21st century, a steep increase in the global population is expected, mostly in Asia and Africa. While there is a saturation of food in developed countries, many developing countries suffer from a food shortage. We examine the production and supply of wheat by continent, focusing mainly on wheat shortages in Asia and Africa. We also drew conclusions about wheat distribution.
Indigenous peoples’ rights in Chile and Canada : a comparative study
Creators: name: Aylwin, José Antonio
Publisher: name: University of British Columbia
Year: 2009

description: This thesis analyses the past and present realities of the rights of Indigenous peoples in Chile and Canada from a comparative perspective. In Chapter I, the author explains the international human rights and Indigenous peoples' law that provide the theoretical framework behind this study. The political and territorial rights that different international forums have acknowledged to these peoples in recent years are identified. The methodology used in the elaboration of this study, which includes the analysis of documentary data, the case study and the interview methods, is explained. The author describes the objective of this study, characterizing it as applied social research aimed at providing information that can be useful for the transformation process in which the peoples that are subject of this study are involved. In Chapters II and III, the author analyses the rights of Indigenous peoples in Chile and Canada respectively from pre-contact until today. The central aspects of their pre-contact cultures and organizations are described. The author also describes main characteristics of the relationships that were established with Indigenous peoples by the Spanish in Chile and by the French and the English in Canada, and later by the states in the two contexts. Special importance is given to those changes recently introduced in the Indigenous-state relationship in both contexts, focusing on their implications for these peoples' rights. In Chapter IV, the author attempts to expand upon the past and present situation of the Indigenous peoples who live in what is now Canada and Chile by including a case study related to each context: the Pehuenche people of the Alto Bio Bio in Chile and the Nisga'a people of the Nass Valley in Canada. In the last Chapter of this thesis (V) the author concludes that, notwithstanding the changes introduced in recent years in the relationship between Indigenous peoples and the Chilean and Canadian states, many and significant problems still impede their ability to enjoy the rights they claim. The author acknowledges, nevertheless, that Indigenous peoples in Canada, through different means, including negotiation and litigation, have achieved a much broader recognition of their political and territorial rights today than have the Indigenous peoples in Chile. The legal, political, cultural and economic factors that explain these differences are also highlighted in this final Chapter.
OzDES Reverberation Mapping Program: Lag recovery reliability for 6-year CIV analysis
Creators: name: Penton, Andrew
name: Malik, Umang
name: Davis, Tamara
name: Martini, Paul
name: Yu, Zhefu
name: Sharp, Rob
name: Lidman, Christopher
name: Tucker, Brad E.
name: Hoormann, Janie
name: Aguena, Michel
name: Allam, Sahar
name: Annis, James
name: Asorey, Jacobo
name: Bacon, David
name: Bertin, Emmanuel
name: Bhargava, Sunayana
name: Brooks, David
name: Calcino, Josh
name: Rosell, Aurelio Carnero
name: Carollo, Daniela
name: Kind, Matias Carrasco
name: Carretero, Jorge
name: Costanzi, Matteo
name: da Costa, Luiz
name: Pereira, Maria Elidaiana da Silva
name: De Vicente, Juan
name: Diehl, H. Thomas
name: Eifler, Tim
name: Everett, Spencer
name: Ferrero, Ismael
name: Fosalba, Pablo
name: Frieman, Josh
name: Garcia-Bellido, Juan
name: Gaztanaga, Enrique
name: Gerdes, David
name: Gruen, Daniel
name: Gruendl, Robert
name: Gschwend, Julia
name: Gutierrez, Gaston
name: Hinton, Samuel
name: Hollowood, Devon L.
name: Honscheid, Klaus
name: James, David
name: Kim, Alex
name: Kuehn, Kyler
name: Kuropatkin, Nikolay
name: Maia, Marcio
name: Marshall, Jennifer
name: Menanteau, Felipe
name: Miquel, Ramon
name: Möller, Anais
name: Morgan, Robert
name: Palmese, Antonella
name: Paz-Chinchon, Francisco
name: Malagón, Andrés Plazas
name: Romer, Kathy
name: Sanchez, Eusebio
name: Scarpine, Vic
name: Scolnic, Daniel
name: Serrano, Santiago
name: Smith, Mathew
name: Suchyta, Eric
name: Swanson, Molly
name: Tarle, Gregory
name: To, Chun-Hao
name: Uddin, Syed
name: Varga, Tamas Norbert
name: Wester, William
name: Wilkinson, Reese
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present the statistical methods that have been developed to analyse the OzDES reverberation mapping sample. To perform this statistical analysis we have created a suite of customisable simulations that mimic the characteristics of each source in the OzDES sample. These characteristics include: the variability in the photometric and spectroscopic lightcurves, the measurement uncertainties, and the observational cadence. By simulating the sources in the OzDES sample that contain the CIV emission line, we developed a set of criteria that rank the reliability of a recovered time lag depending on the agreement between different recovery methods, the magnitude of the uncertainties, and the rate at which false positives were found in the simulations. These criteria were applied to simulated light curves and these results used to estimate the quality of the resulting Radius-Luminosity relation.We grade the results using three quality levels (gold, silver and bronze). The input slope of the R-L relation was recovered within $1σ$ for each of the three quality samples, with the gold standard having the lowest dispersion with a recovered a R-L relation slope of $0.454\pm 0.016$ with an input slope of 0.47. Future work will apply these methods to the entire OzDES sample of 771 AGN.
description: 16 pages, 15 figures, accepted for publication in NMRAS
Mass Loss Due to Sputtering and Thermal Processes in Meteoroid Ablation
Creators: name: Rogers, L. A.
name: Hill, K. A.
name: Hawkes, R. L.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Conventional meteoroid theory assumes that the dominant mode of ablation is by evaporation following intense heating during atmospheric flight. In this paper we consider the question of whether sputtering may provide an alternative disintegration process of some importance.For meteoroids in the mass range from 10^-3 to 10^-13 kg and covering a meteor velocity range from 11 to 71 km/s, we numerically modeled both thermal ablation and sputtering ablation during atmospheric flight. We considered three meteoroid models believed to be representative of asteroidal (3300 kg m^-3 mass density), cometary (1000 kg m^-3) and porous cometary (300 kg m^-3) meteoroid structures. Atmospheric profiles which considered the molecular compositions at different heights were used in the sputtering calculations. We find that while in many cases (particularly at low velocities and for relatively large meteoroid masses) sputtering contributes only a small amount of mass loss during atmospheric flight, in some cases sputtering is very important. For example, a 10^-10 kg porous meteoroid at 40 km/s will lose nearly 51% of its mass by sputtering, while a 10^-13 kg asteroidal meteoroid at 60 km/s will lose nearly 83% of its mass by sputtering. We argue that sputtering may explain the light production observed at very great heights in some Leonid meteors. The impact of this work will be most dramatic for very small meteoroids such as those observed with large aperture radars.
description: in pdf form, 48 pgs incl figures and tables