cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Data Stewardship Fundamentals: Module 2, Data Governance, Policy, Procedures, and Structure
Creators: name: Hajikhanov, Nijat
Publisher: name: Zenodo
Year: 2024

description: Slides used for Data Stewardship Fundamentals training held by Digital Learning Hub (DLH) on 27, 28 June 2024.

Link to training: https://dlh.lu/product/data-stewardship-fundamentals/
A New Option for a Search for Alpha Variation: Narrow Transitions with Enhanced Sensitivity
Creators: name: Karshenboim, S. G.
name: Nevsky, A. Yu.
name: Angstmann, E. J.
name: Dzuba, V. A.
name: Flambaum, V. V.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We consider several transitions between narrow lines that have an enhanced sensitivity to a possible variation of the fine structure constant, alpha. This enhancement may allow a search to be performed with an effective suppression of the systematic sources of uncertainty that are unavoidable in conventional high-resolution spectroscopic measurements. In the future this may provide the strongest laboratory constraints on alpha variation.
Hybrid Feedback for Global Tracking on Matrix Lie Groups $SO(3)$ and $SE(3)$
Creators: name: Wang, Miaomiao
name: Tayebi, Abdelhamid
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optimization and Control (math.OC)
subject: Robotics (cs.RO)
subject: Systems and Control (eess.SY)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: We introduce a new hybrid control strategy, which is conceptually different from the commonly used synergistic hybrid approaches, to efficiently deal with the problem of the undesired equilibria that precludes smooth vectors fields on $SO(3)$ from achieving global stability. The key idea consists in constructing a suitable potential function on $SO(3)\times \mathbb{R}$ involving an auxiliary scalar variable, with flow and jump dynamics, which keeps the state away from the undesired critical points while, at the same time, guarantees a decrease of the potential function over the flows and jumps. Based on this new hybrid mechanism, a hybrid feedback control scheme for the attitude tracking problem on $SO(3)$, endowed with global asymptotic stability and semi-global exponential stability guarantees, is proposed. This control scheme is further improved through a smoothing mechanism that removes the discontinuities in the input torque. The third hybrid control scheme, proposed in this paper, removes the requirement of the angular velocity measurements, while preserving the strong stability guarantees of the first hybrid control scheme. This approach has also been applied to the tracking problem on $SE(3)$ to illustrate its advantages with respect to the existing synergistic hybrid approaches. Finally, some simulation results are presented to illustrate the performance of the proposed hybrid controllers.
description: Accepted for publication in IEEE Transaction on Automatic Control. 16 pages, 5 figures
Inclusions and positive cones of von Neumann algebras
Creators: name: Tanimoto, Yoh
Publisher: name: arXiv
Year: 2008
Subjects: subject: Operator Algebras (math.OA)
subject: FOS: Mathematics
subject: 46L10

description: We consider cones in a Hilbert space associated to two von Neumann algebras and determine when one algebra is included in the other. If a cone is assocated to a von Neumann algebra, the Jordan structure is naturally recovered from it and we can characterize projections of the given von Neumann algebra with the structure in some special situations.
description: 20 pages, no figure
PathoNet: Deep learning assisted evaluation of Ki-67 and tumor infiltrating lymphocytes (TILs) as prognostic factors in breast cancer; A large dataset and baseline
Creators: name: Negahbani, Farzin
name: Sabzi, Rasool
name: Jahromi, Bita Pakniyat
name: Movahedi, Fateme
name: Shirazi, Mahsa Kohandel
name: Majidi, Shayan
name: Firouzabadi, Dena
name: Dehghanian, Amirreza
Publisher: name: arXiv
Year: 2020
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: The nuclear protein Ki-67 and Tumor infiltrating lymphocytes (TILs) have been introduced as prognostic factors in predicting tumor progression and its treatment response. The value of the Ki-67 index and TILs in approach to heterogeneous tumors such as Breast cancer (BC), known as the most common cancer in women worldwide, has been highlighted in the literature. Due to the indeterminable and subjective nature of Ki-67 as well as TILs scoring, automated methods using machine learning, specifically approaches based on deep learning, have attracted attention. Yet, deep learning methods need considerable annotated data. In the absence of publicly available benchmarks for BC Ki-67 stained cell detection and further annotated classification of cells, we propose SHIDC-BC-Ki-67 as a dataset for the aforementioned purpose. We also introduce a novel pipeline and a backend, namely PathoNet for Ki-67 immunostained cell detection and classification and simultaneous determination of intratumoral TILs score. Further, we show that despite facing challenges, our proposed backend, PathoNet, outperforms the state of the art methods proposed to date in the harmonic mean measure.
description: This is a preprint of an article published in Nature Publishing Group, Scientific Reports. The final authenticated version is available online at: https://www.nature.com/articles/s41598-021-86912-w
We have nothing to lose but our spin chains
Creators: name: Horton, Matthew D. P.
Publisher: name: University of British Columbia
Year: 2009

description: Two quantum spin chains problems are discussed. Firstly, using the exact form factors of the 0(3) nonlinear a model the three-magnon contribution to the spin correlation function of a spin-1 chain is calculated. A very broad peak with a small amplitude is predicted. The integrated intensity of this contribution relative to the single magnon peak is of the order 2%. Experimentally, such a contribution would be difficult, if not impossible, to observe. In the second problem we consider the problem of doping spin-1 magnetic materials with nonmagnetic impurities. In the case where interchain coupling is weak, the nonmagnetic impurities effectively cut decoupled spin chains into finite lengths. We impose free boundary conditions at the chain ends and apply bosonization, mapping the problem onto a torus. Using this formalism we are able to numerically calculate the alternating susceptibility for any reasonable length chain at any temperature. The Neel temperature is then calculated for a three dimensional square lattice as a function of average chain length.
Magnetic Properties of J-J-J' Quantum Heisenberg Chains with Spin S=1/2, 1, 3/2 and 2 in a Magnetic Field
Creators: name: Gu, Bo
name: Su, Gang
name: Gao, Song
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: By means of the density matrix renormalization group (DMRG) method, the magnetic properties of the J-J-J$^{\prime}$ quantum Heisenberg chains with spin $S=1/2$, 1, 3/2 and 2 in the ground states are investigated in the presence of a magnetic field. Two different cases are considered: (a) when $J$ is antiferromagnetic and $J^{\prime}$ is ferromagnetic (i.e. the AF-AF-F chain), the system is a ferrimagnet. The plateaus of the magnetization are observed. It is found that the width of the plateaus decreases with increasing the ferromagnetic coupling, and disappears when $% J^{\prime}/J$ passes over a critical value. The saturated field is observed to be independent of the ferromagnetic coupling; (b) when $J$ is ferromagnetic and $J^{\prime}$ is antiferromagnetic (i.e. the F-F-AF chain), the system becomes an antiferromagnet. The plateaus of the magnetization are also seen. The width of the plateaus decreases with decreasing the antiferromagnetic coupling, and disappears when $J^{\prime}/J $ passes over a critical value. Though the ground state properties are quite different, the magnetization plateaus in both cases tend to disappear when the ferromagnetic coupling becomes more dominant. Besides, no fundamental difference between the systems with spin half-integer and integer has been found.
description: 8 pages, 9 figures, to be published in J. Phys.: Condens. Matter
Cryogenic microwave loss in epitaxial Al/GaAs/Al trilayers for superconducting circuits
Creators: name: McRae, C. R. H.
name: McFadden, A.
name: Zhao, R.
name: Wang, H.
name: Long, J. L.
name: Zhao, T.
name: Park, S.
name: Bal, M.
name: Palmstrøm, C. J.
name: Pappas, D. P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Epitaxially-grown superconductor/dielectric/superconductor trilayers have the potential to form high-performance superconducting quantum devices and may even allow scalable superconducting quantum computing with low-surface-area qubits such as the merged-element transmon. In this work, we measure the power-independent loss and two-level-state (TLS) loss of epitaxial, wafer-bonded, and substrate-removed Al/GaAs/Al trilayers by measuring lumped element superconducting microwave resonators at millikelvin temperatures and down to single photon powers. The power-independent loss of the device is $(4.8 \pm 0.1) \times 10^{-5}$ and resonator-induced intrinsic TLS loss is $(6.4 \pm 0.2) \times 10^{-5}$. Dielectric loss extraction is used to determine a lower bound of the intrinsic TLS loss of the trilayer of $7.2 \times 10^{-5}$. The unusually high power-independent loss is attributed to GaAs's intrinsic piezoelectricity.
Himallaphus Löbl & Kodada 2021
Creators: name: Löbl, Ivan
name: Kodada, Ján
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Himallaphus

description: Key to the species of Himallaphus Peduncle of maxillary palpomere IV about as long or shorter than thickened apical part Peduncle of maxillarypalpomere IV about as long or shorter than thickened apical part..... 2 - Peduncle of maxillary palpomere IV distinctly longer than thickened apical part....................................................... 3 2 Elytra impressed basally, with carinate basal and lateral margins...................................................  H. pahilo n. sp. - Elytranot impressed basally, with basal and lateral margins not carinate..............................................  H. bhaai n. sp. 3 Contours of temples oblique or slightly concave in dorsal view........................................................  H. bahan n. sp. - Contours of temples rounded in dorsal view.................. 4 4 Vertex and upper surface of temples striate, lower part of temples not explanate................................  H. arko n. sp. - Vertexand upper surface of temples smooth, lower part of temples not explanate..........................  H. chehara n. sp.
description: Published as part of Löbl, Ivan & Kodada, Ján, 2021, On the Himalayan Pselaphini (Insecta: Coleoptera: Staphylinidae: Pselaphinae), pp. 349-368 in Biodiversität und Naturausstattung im Himalaya VII, Erfurt :Naturkundemuseum on page 355, DOI: 10.5281/zenodo.5793818
Constraining the density dependence of the symmetry energy with nuclear data and astronomical observations in the KIDS framework
Creators: name: Gil, Hana
name: Kim, Young-Min
name: Papakonstantinou, Panagiota
name: Hyun, Chang Ho
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The KIDS framework for the nuclear equation of state (EoS) and energy density functional (EDF) offers the possibility to explore symmetry-energy (SE) parameters such as J (value at saturation density), L (slope), Ksym (curvature) and so on independently of each other and of assumptions about the effective mass. Here we examine the performance of EoSs with different SE parameters in reproducing nuclear properties and astronomical observations in an effort to constrain especially L and Ksym or the droplet-model counterpart Ktau. Assuming a standard EoS for symmetric matter, we explore several points on the hyperplane of (J,L,Ksym or Ktau) values. For each point, the corresponding EDF parameters and a pairing parameter are obtained for applications in spherical even-even nuclei. This is the first application of KIDS EDFs with pairing correlations. The EoSs are tested successively on properties of closed-shell nuclei, along the Sn isotopic chain, and on astronomical observations, in a step-by-step process of elimination and correction. A small regime of best-performing parameters is determined. The results strongly suggest that Ksym is negative and no lower than -200MeV, that Ktau lies between roughly -400 and -300MeV and that L lies between 40 and 65MeV with L<55MeV more likely. Correlations between symmetry-energy parameters are critically discussed. Predictions for the position of the neutron drip line and the neutron skin thickness of selected nuclei are reported. They are only weakly affected by the choice of effective mass values. Parts of the drip line can be sensitive to the SE parameters. The results underscore the role of Ktau and of precise astronomical input. Better constraints are possible with precise fits to nuclear energies and, in the future, more-precise input from astronomy.
description: 15 pages incl. 7 figures, 4 tables; this version of the preprint (v2) corresponds to the published version (some comments added, a few typos corrected)
MAJOZIY TASVIR VA POETIK NUTQ (ERKIN A'ZAM QISSALARI MISOLIDA)
Creators: name: Axmadiy, Komila
Publisher: name: Zenodo
Year: 2024

description: Maqolada muallif Erkin A’zamning  qissalari o‘ziga xos syujet-kompozitsion xususiyatlarga ega ekanligi yuzasidagi kuzatishlar bayon etilgan. Ushbu asarlarning g‘oyaviy-badiiy saviyasini ko‘rsatish va baholashda ulardagi majoziy tasvir mahoratini o‘rganish katta ahamiyat kasb etishi ko’rsatilgan.
Investigation of $Ξ^{-}nn$ ($S=-2$) Hypernucleus in Low-energy Pionless Halo Effective Theory
Creators: name: Meher, Ghanashyam
name: Raha, Udit
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In the strangeness $S=-2$ sector, we study the $Ξ^{-}nn$ ($I=3/2, J^P={1/2}^+$) three-body system using pionless halo effective field theory (EFT), which provides a systematic model independent framework for assessing the feasibility of light particle-stable three-body bound states, utilizing low-energy universality. Here we take recourse to a simplistic speculation of the three-body system by eliminating the repulsive spin-singlet $Ξ^- n$ sub-system, while retaining the predominantly attractive (possibly bound) spin-triplet $Ξ^{-}n$ and the virtual bound spin-singlet $nn$ sub-system. In particular, a qualitative leading order EFT investigation by introducing a sharp momentum (ultraviolet) cut-off parameter $Λ_c$ into the Faddeev-like coupled integral equations, indicates a discrete scaling behavior akin to a renormalization group limit cycle, thereby suggesting the formal existence of Efimov states in the unitary limit, as $Λ_c\to \infty$. Our subsequent non-asymptotic analysis indicates that the three-body binding energy $B_3$ is sensitively dependent on the cut-off without the inclusion of three-body contact interactions. Furthermore, our analysis reproduces several values of the binding energy $B_3\sim 3-4$ MeV, predicted in context of existing potential models, with the regulator $Λ_c$ in the range, $\sim 350-460$ MeV. Finally, based on these model inputs for $B_3$, a ballpark estimate of the three-body scattering length in the range, $2.6-4.9$ fm, is naively constrained by our EFT analysis, ostensibly demonstrating the universal nature of three-body correlations that is likely to manifest themselves in a halo-bound $Ξ^{-}nn$ system.
description: 35 pages, 10 figures
On the Logarithmic Asymptotics of the Sixth Painleve' Equation (Summer 2007)
Creators: name: Guzzetti, Davide
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: General Topology (math.GN)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 02.30Hq, 02.30.Jr

description: We study the solutions of the sixth Painlevé equation with a logarithmic asymptotic behavior at a critical point. We compute the monodromy group associated to the solutions by the method of monodromy preserving deformations and we characterize the asymptotic behavior in terms of the monodromy itself.
description: LaTeX with 8 figures
On NS-NS couplings at order $α'^3$
Creators: name: Garousi, Mohammad R.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Recently, imposing the gauge-symmetry and the T-duality constraints on the string frame effective actions of type II superstring theories, the NS-NS cuplings have been found in a particular scheme which has 445 couplings in 15 different structures. In this paper, using a field redefinition, we write them in terms of 251 couplings which appear in 9 different structures. The 9 structures involve only Riemann curvature, $H_{αβμ}$ and $\nabla_αH_{βμν}$. The number of couplings in the structures $R^4$, $H^8$, $H^6R$, $H^4R^2$, $H^2R^3$ are $2,\, 2,\, 1,\, 7,\,22$, respectively, and the number of couplings in the structures $(\nabla H)^4$, $(\nabla H)^2 R^2$, $(\nabla H)^2 H^4$, $(\nabla H)^2H^2R$ are $12,\, 22,\, 77,\, 106$, respectively. The new couplings are fully consistent with the sphere-level S-matrix element of four NS-NS vertex operators.
description: 15 pages, Latex file, no figure. arXiv admin note: text overlap with arXiv:2006.09193; v2: the version appears in NPB
Pselaphaulax Reitter 1909
Creators: name: Löbl, Ivan
name: Kodada, Ján
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Pselaphaulax

description: Pselaphaulax Reitter, 1909 This genus comprises over 60 species and is widely distributed in the Old World and in Australia. An overview and key to its Asian members are lacking, and the available information on most included species is limited to their original descriptions. Threeare three species in the Himalayan collections examined. Two of them have maxillary palpomeres IV apically truncate with a sensory area in a circular impression. This character is not congruent with the definition of the genus as given by CHANDLER (2001). In addition, they lack carinate outer margins of the pronotal sulci, situated between the basal margin and the lateral antebasal foveae. The third Himalayan species has the maxillary palpomere IV with a sharply defined Vshaped sensory area but unlike other examined species lacks lateral pronotal sulci. The three Himalayan species have the gular moundweakly narrowed posteriad, with the lateral margins oblique or slightly convex and the apical margin nearly transverse. As only a single specimen is available for the two new species described below, we did not clear the elytra to verify the number of the basal foveae and the state of the hind wings. However, their short elytra indicate atrophy of hind wings, a characterstate correlated with reducedeyes. The third unnamed species has the hind wings atrophied and the elytra each with three basal foveae, the outer foveae being oblique, and the antebasal foveae are lacking.
description: Published as part of Löbl, Ivan & Kodada, Ján, 2021, On the Himalayan Pselaphini (Insecta: Coleoptera: Staphylinidae: Pselaphinae), pp. 349-368 in Biodiversität und Naturausstattung im Himalaya VII, Erfurt :Naturkundemuseum on page 355, DOI: 10.5281/zenodo.5793818
description: {"references": ["CHANDLER, D. S. (2001): Biology, morphology, and systematics of the ant-like litter beetles of Australia (Coleoptera: Staphylinidae: Pse- laphinae). - Memoirs on Entomology, International 15: viii + 552 pp."]}
Fabricating silicon mesh bolometers for BAM
Creators: name: Chen, Karen
Publisher: name: University of British Columbia
Year: 2009

description: Silicon membranes have been fabricated and etched into mesh structures using both wet and Cl₂ plasma etching. The most repeatable process involoved wet etching triple bonded wafers with a buried oxide layer. A recipe to build Si meshes, with a grid spacing of 375 μm and leg cross-sections of 5 μm by 30 μm, from 5 μm thick membranes is described. The meshes are supported by 4 legs that are each 30 μm wide and 1 mm long. Also, the resistivity of thin gold films was measured for temperatures ranging from 4.2 K to 300 K. It was found that the ideal thickness, that leads to a sheet resistance of at 300 mK for of 5μm by 385μm gold lines, was 150 Å. A bolometer building process that incorporates the gold evaporations with the mesh building procedure is given, although preliminary attempts to produce bolometers have been unsuccessful.
Selective dilution and magnetic properties of La_{0.7}Sr_{0.3}Mn_{1-x}M'_xO_3 (M' = Al, Ti)
Creators: name: Nam, D. N. H.
name: Bau, L. V.
name: Khiem, N. V.
name: Dai, N. V.
name: Hong, L. V.
name: Phuc, N. X.
name: Newrock, R. S.
name: Nordblad, P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The magnetic lattice of mixed-valence Mn ions in La$_{0.7}$Sr$_{0.3}$MnO$_3$ is selectively diluted by partial substitution of Mn by Al or Ti. The ferromagnetic transition temperature and the saturation moment decreases with substitution in both series. The volume fraction of the non-ferromagnetic phases evolves non-linearly with the substitution concentration and faster than theoretically expected. By presenting the data in terms of selective dilutions, the reduction of $T_\mathrm{c}$ is found to be scaled by the relative ionic concentrations and is consistent with a prediction derived from molecular-field theory.
description: 6 pages, 5 figures, REVTex4.0. Submitted to PRB
U.S. FARM POLICY AND THE WORLD TRADE ORGANIZATION: HOW DO THEY MATCH UP?
Creators: name: Hart, Chad E.
name: Babcock, Bruce A.
name: Hart, Chad E.
name: Babcock, Bruce A.
Publisher: name: Unknown
Year: 2002
Subjects: Agricultural and Food Policy
International Relations/Trade

description: The debate over a new farm bill has focused on how to spend an additional $73.5 billion in funding for the agricultural budget over 10 years. The House of Representatives, the Senate agriculture committee, and Senators Cochran and Roberts (supported by the Bush administration) have each proposed a structure for the next farm bill. A critical question becomes whether these proposals conflict with U.S. commitments to limit subsidies under the World Trade Organization (WTO) agreement. This paper explores this issue and concludes with a discussion of the future direction of U.S. farm subsidies and new WTO agreements.
Higher Spins from Nonlinear Realizations of $OSp(1|8)$
Creators: name: Ivanov, Evgeny
name: Lukierski, Jerzy
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We exhibit surprising relations between higher spin theory and nonlinear realizations of the supergroup $OSp(1|8)$, a minimal superconformal extension of N=1, 4D supersymmetry with tensorial charges. We construct a realization of $OSp(1|8)$ on the coset supermanifold $OSp(1|8)/SL(4,R)$ which involves the tensorial superspace $R^{(10|4)}$ and Goldstone superfields given on it. The covariant superfield equation encompassing the component ones for all integer and half-integer massless higher spins amounts to the vanishing of covariant spinor derivatives of the suitable Goldstone superfields, and, via Maurer-Cartan equations, to the vanishing of $SL(4,R)$ supercurvature in odd directions of $R^{(10|4)}$. Aiming at higher spin extension of the Ogievetsky-Sokatchev formulation of N=1 supergravity, we generalize the notion of N=1 chirality and construct first examples of invariant superfield actions involving a non-trivial interaction. Some other potential implications of $OSp(1|8)$ in the proposed setting are briefly outlined.
description: LaTeX, 13 pages. Minor, mostly typographic corrections. Version which appears in Physics Letters B
Welfare-Improving Collusion in the Japanese Pork Import Market
Creators: name: Fabiosa, Jacinto F.
name: Fabiosa, Jacinto F.
Publisher: name: Unknown
Year: 2000
Subjects: subject: International Relations/Trade
subject: Livestock Production/Industries
subject: Collusion
subject: international agricultural trade
subject: policy analysis
subject: welfare

description: Imports are increasingly becoming a significant source of Japan's pork supply. Japan's share of imports to total consumption increased from 9 percent in 1980 to 24 percent in 1990, reaching a maximum of 44 percent in 1996. Under the World Trade Organization (WTO) safeguard provisions for pork, Japan can raise its gate price by 24 percent when imports in a given quarter are 119 percent higher than the average imports of the last three years of the same quarter. Japan has already invoked the safeguard provision twice since the Uruguay Round Agreement on Agriculture (URAA) was signed in 1995. In both cases, the level and volatility of retail prices increased; the CIF values of imports increased, making the impact on the government of Japan (GOJ) tax revenue uncertain; the level of imports and stocks increased; and the timing of imports changed. New underlying parameter estimates suggest that the reduction in pork exporters' profit is three times higher when the Japanese General Agreement on Tariffs and Trade (GATT) safeguard is invoked, providing foreign pork suppliers an incentive to collude to avoid exceeding the trigger. Workable and efficient allocation rules are constructed with a multi-plant monopolist structure that allows trade of quota. This collusion is welfare-improving since the safeguard induces more inefficiencies, including larger deadweight loss and a shift from low cost to high cost pork supply.
Quantum-to-classical transition via quantum cellular automata
Creators: name: Costa, Pedro C. S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A quantum cellular automaton (QCA) is an abstract model consisting of an array of finite-dimensional quantum systems that evolves in discrete time by local unitary operations. Here we propose a simple coarse-graining map, where the spatial structure of the QCA is merged into effective ones. Starting with a QCA that simulates the Dirac equation, we apply this coarse-graining map recursively until we get its effective dynamics in the semiclassical limit, which can be described by a classical cellular automaton. We show that the emergent-effective result of the former microscopic discrete model converges to the diffusion equation and to a classical transport equation under a specific initial condition. Therefore, QCA is a good model to validate the quantum-to-classical transition.
description: 10 pages, 5 figures
Eco-Labels and International Trade in Textiles
Creators: name: Nimon, R. Wesley
name: Beghin, John C.
name: Nimon, R. Wesley
name: Beghin, John C.
Publisher: name: Unknown
Year: 1999
Subjects: subject: Environmental Economics and Policy
subject: International Relations/Trade
subject: eco-labels
subject: textiles markets

description: This paper provides a formal analysis of the welfare and trade implications of eco-labeling schemes. A simple model of vertical (quality) differentiation captures major stylized features of the textiles market in which trading takes place between an industrialized North (domestic) and a developing South (foreign). The paper investigates several labeling scenarios (labeling by North, labeling by both North and South, and harmonization). A labeling scheme in the North without the South's participation is detrimental to both the North's and the South's producers of conventional textiles. In aggregate, the North's textiles industry benefits from the introduction of the label. If the South creates its own label, it regains market share in aggregate, but at the cost of its conventional textiles sector; both of North's industries lose. Consumers gain with a wider choice and with higher quality of textile goods. They would favor upward international harmonization of eco-labels towards the higher quality of the North, as long as the South participates in production and provides some cost discipline.
LIVING WITH HOGS IN IOWA: THE IMPACT OF LIVESTOCK FACILITIES ON RURAL RESIDENTIAL PROPERTY VALUES
Creators: name: Secchi, Silvia
name: Herriges, Joseph A.
name: Babcock, Bruce A.
name: Secchi, Silvia
name: Herriges, Joseph A.
name: Babcock, Bruce A.
Publisher: name: Unknown
Year: 2003
Subjects: subject: Community/Rural/Urban Development
subject: Livestock Production/Industries
subject: hedonic model
subject: livestock
subject: property values

description: To better understand the magnitude of the effects of livestock feeding operations on residential property values, we constructed a new dataset that merges data on home sales with data on the location and size of livestock feeding operations in five rural counties of Iowa. We estimated a hedonic model to explain variations in residential sales price with standard house attributes, such as number of bedrooms and square feet of living space, as well as the effects of distance and density of livestock feeding operation. We find that livestock operations have an overall statistically significant effect on property values. Predicted negative effects are largest for properties that are downwind and close to livestock operations. In addition, feeding operations that are moderate in size have more impact than do large-scale operations, most likely reflecting age, type, and management practices of the moderate-sized operations. The limited size of the estimated effects suggest that common sense rules-such as not locating feeding operations close to and upwind of residences-combined with modest compensatory payments could help rural residences co-exist with modern feeding operations.
Tailoring the physical parameters of ferroelectric liquid crystal mixture with cadmium selenide quantum dots
Creators: name: Kaur, Gagandeep
name: Malik, Poonma
name: Yadav, Sushma
name: Malik, Praveen
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Physical Sciences not elsewhere classified
subject: Physiology
subject: FOS: Biological sciences
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine

description: Present studies demonstrate the dispersion effect of cadmium selenide quantum dots on ferroelectric liquid crystal mixture properties. Varying concentrations of cadmium selenide quantum dots (0.05 wt.%, 0.10 wt.% and 0.50 wt.%) have been taken to investigate its influence on the physical parameters of ferroelectric liquid crystal mixture KCFLC 10R. Phase transition, textural, electro-optical and photoluminescence studies have been performed in planar aligned cells. The presence of QDs disturbs the geometrical symmetry and molecular tilt of ferroelectric liquid crystal molecules which results in the modification of physical parameters of ferroelectric liquid crystal. It has been observed that doped samples have shown decrement in spontaneous polarisation and rotational viscosity. However, there is an improvement in the response time of the doped samples. The reduction in the spontaneous polarisation with voltage signifies that doped samples can operate at low voltage (~6 V) as compared to ferroelectric liquid crystal mixture (~12 V). Photoluminescence studies reveal that all the samples absorb UV light ~340 nm and produce visible emission at ~ 400 nm which can behave as UV light storage and high contrast display. This would be beneficial for luminescent displays as well as UV to visible light conversion applications. Dispersion of cadmium selenide quantum dots with varying concentration in ferroelectric liquid crystal mixture has been investigated.Temperature- as well as voltage-dependent electro-optical parameters and photoluminescence studies have been done and analysed.Fast response time has been observed in the doped samples as compared to FLC mixture.Doped samples can be operated at low voltage (~6 V) as compared to FLC mixture (~12 V)These prepared samples can be used for UV to visible light conversion applications. Dispersion of cadmium selenide quantum dots with varying concentration in ferroelectric liquid crystal mixture has been investigated. Temperature- as well as voltage-dependent electro-optical parameters and photoluminescence studies have been done and analysed. Fast response time has been observed in the doped samples as compared to FLC mixture. Doped samples can be operated at low voltage (~6 V) as compared to FLC mixture (~12 V) These prepared samples can be used for UV to visible light conversion applications.
Momentum Map and Action-Angle Variables for Nambu Dynamics
Creators: name: Tegmen, A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Momentum map is a reduction procedure that reduces the dimension of a Hamiltonian system to the lower ones. It is shown that behavior of the action-angle variables under the momentum map generates the new action-angle variables for the reduced system considered as a Nambu structure. The symmetrical top is given as an illustration.
description: LaTEX, 8 pages
Separation of liquid crystalline racemic mixtures obtained on the basis of (R,S)-2-hexanol on amylose tris(3-chloro-5-methylphenylcarbamate) covalently immobilised on silica in high-performance liquid chromatography
Creators: name: Urbańska, Magdalena
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biochemistry
subject: Space Science
subject: Medicine
subject: Chemical Sciences not elsewhere classified
subject: Sociology
subject: FOS: Sociology
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Plant Biology
subject: FOS: Biological sciences

description: The separation on the enantiomers of thirteen newly synthesised liquid crystalline racemic mixtures obtained on the basis of (R,S)-2-hexanol was studied in HPLC on a chiral column prepared by covalent immobilisation of the chiral selector, namely amylose tris(3-chloro-5-methylphenylcarbamate) on silica. The mobile phases (MPs) consisting of n-heptane/isopropanol (IPA) or acetonitrile (ACN)/water (H2O) at different volume ratios were used. All measurements were made at room temperature. The order of the elution was also determined. The chromatographic parameters such as: resolution - (R), selectivity - (α) and number of theoretical plates - (N) were determined. On the basis of the obtained results, optimal conditions were indicated for the best separation of the tested racemic mixtures.
Lorentz Violation and Faddeev-Popov Ghosts
Creators: name: Altschul, B.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider how Lorentz-violating interactions in the Faddeev-Popov ghost sector will affect scalar QED. The behavior depends sensitively on whether the gauge symmetry is spontaneously broken. If the symmetry is not broken, Lorentz violations in the ghost sector are unphysical, but if there is spontaneous breaking, radiative corrections will induce Lorentz-violating and gauge-dependent terms in other sectors of the theory.
description: 13 pages
Deformation of drops by outer eddies in turbulence
Creators: name: Vela-Martín, Alberto
name: Avila, Marc
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Drop deformation in fluid flows is investigated here as an exchange between the kinetic energy of the fluid and the surface energy of the drop. We show analytically that this energetic exchange is controlled only by the stretching (or compression) of the drop surface by the rate-of-strain tensor. This mechanism is analogous to the stretching of the vorticity field in turbulence. Leveraging the non-local nature of turbulence dynamics, we introduce a new decomposition that isolates the energetic exchange due to local drop-induced surface effects, from the non-local action of turbulent fluctuations. We perform direct numerical simulations of single inertial drops in isotropic turbulence and show that an important contribution to the increments of the surface energy arises from the non-local stretching of the fluid-fluid interface by eddies far from the drop surface (outer eddies). We report that this mechanism is dominant and independent of surface dynamics in a range of Weber numbers in which drop breakup occurs. These findings shed new light on drop deformation and breakup in turbulent flows, and open the venue for the improvement and simplification of breakup models.
Influence of the Premium Subsidy on Farmers' Crop Insurance Coverage Decisions
Creators: name: Babcock, Bruce A.
name: Hart, Chad E.
name: Babcock, Bruce A.
name: Hart, Chad E.
Publisher: name: Unknown
Year: 2005
Subjects: subject: Risk and Uncertainty
subject: Agricultural Risk Protection Act
subject: crop insurance
subject: premium subsidies

description: The Agricultural Risk Protection Act greatly increased the expected marginal net benefit of farmers buying high-coverage crop insurance policies by coupling premium subsidies to coverage level. This policy change, combined with cross-sectional variations in expected marginal net benefits of high-coverage policies, is used to estimate the role that premium subsidies play in farmers' crop insurance decisions. We use county data for corn, soybeans, and wheat to estimate regression equations that are then used to obtain insight into two policy scenarios. We first estimate that eventual adoption of actuarially fair incremental premiums, combined with current coupled subsidies, would increase farmers' purchase of high-coverage policies by almost 400 percent across the three crops and two plans of insurance included in the analysis. We then estimate that a return to decoupled subsidies would decrease farmers' high-coverage purchase decisions by an average of 36 percent.
INTEGRAL and RXTE observations of accreting millisecond pulsar IGR J00291+5934 in outburst
Creators: name: Falanga, M.
name: Kuiper, L.
name: Poutanen, J.
name: Bonning, E. W.
name: Hermsen, W.
name: Di Salvo, T.
name: Goldoni, P.
name: Goldwurm, A.
name: Shaw, S. E.
name: Stella, L.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Simultaneous observations of the accretion-powered millisecond pulsar IGR J00291+5934 by International Gamma-Ray Astrophysics Laboratory and Rossi X-ray Timing Explorer during the 2004 December outburst are analysed. The average spectrum is well described by thermal Comptonization with an electron temperature of 50 keV and Thomson optical depth tau_T ~ 1 in a slab geometry. The spectral shape is almost constant during the outburst. We detect a spin-up of the pulsar with nudot=8.4x10E-13 Hz/s. The ISGRI data reveal the pulsation of X-rays at a period of 1.67 milliseconds up to ~150 keV. The pulsed fraction is shown to increase from 6 per cent at 6 keV to 12--20 per cent at 100 keV. This is naturally explained by the action of the Doppler effect the exponentially cutoff Comptonization spectrum from the hot spot. The nearly sinusoidal pulses show soft lags with complex energy dependence, increasing up to 7 keV, then decreasing to 15 keV, and seemingly saturating at higher energies.
description: 11 pages, 8 figures, 3 tables, accepted for publication on A&A
Nonlocal pure spin current injection via quantum pumping and crossed Andreev reflection
Creators: name: Benjamin, Colin
name: Citro, Roberta
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A pure spin current injector is proposed based on adiabatic pumping and crossed normal/Andreev reflection. The device consists of a three-terminal ferromagnet-superconductor-semiconductor system in which the injection of a pure spin current is into the semiconductor which is coupled to the superconductor within a coherence length away from the ferromagnet enabling the phenomena of crossed normal /Andreev reflection to operate. Quantum pumping is induced by adiabatically modulating two independent parameters of the ferromagnetic lead, namely the magnetization strength and the strength of coupling between the ferromagnet and the superconductor. The competition between the normal/Andreev reflection and the crossed normal/Andreev reflection, both induced by pumping, leads to non-local injection of a pure spin current into the semiconductor. The experimental realization of the proposed device is also discussed.
description: 11 pages, 6 figures, 1 table; Accepted for publication in Physical Review B
Field-Tuned Quantum Effects in a Triangular-Lattice Ising Magnet
Creators: name: Qin, Yayuan
name: Shen, Yao
name: Liu, Changle
name: Wo, Hongliang
name: Gao, Yonghao
name: Feng, Yu
name: Zhang, Xiaowen
name: Ding, Gaofeng
name: Gu, Yiqing
name: Wang, Qisi
name: Shen, Shoudong
name: Walker, Helen C.
name: Bewley, Robert
name: Xu, Jianhui
name: Boehm, Martin
name: Steffens, Paul
name: Ohira-Kawamura, Seiko
name: Murai, Naoki
name: Schneidewind, Astrid
name: Tong, Xin
name: Chen, Gang
name: Zhao, Jun
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report thermodynamic and neutron scattering measurements of the triangular-lattice quantum Ising magnet TmMgGaO 4 in longitudinal magnetic fields. Our experiments reveal a quasi-plateau state induced by quantum fluctuations. This state exhibits an unconventional non-monotonic field and temperature dependence of the magnetic order and excitation gap. In the high field regime where the quantum fluctuations are largely suppressed, we observed a disordered state with coherent magnon-like excitations despite the suppression of the spin excitation intensity. Through detailed semi-classical calculations, we are able to understand these behaviors quantitatively from the subtle competition between quantum fluctuations and frustrated Ising interactions.
description: Published version
Estimation of a Binary Choice Model with Grouped Choice Data
Creators: name: Kurkalova, Lyubov A.
name: Rabotyagov, Sergey S.
name: Kurkalova, Lyubov A.
name: Rabotyagov, Sergey S.
Publisher: name: Unknown
Year: 2005
Subjects: Research Methods/ Statistical Methods

description: We propose an econometric technique for estimating the parameters of a binary choice model when only aggregated data are available on the choices made. The method performs favorably in applications to both simulated and real world choice data.
RECREATION DEMAND USING PHYSICAL MEASURES OF WATER QUALITY
Creators: name: Herriges, Joseph A.
name: Egan, Kevin J.
name: Kling, Catherine L.
name: Downing, John A.
name: Herriges, Joseph A.
name: Egan, Kevin J.
name: Kling, Catherine L.
name: Downing, John A.
Publisher: name: Unknown
Year: 2004
Subjects: subject: Resource /Energy Economics and Policy
subject: Clean Water Act
subject: CWA
subject: recreation demand model
subject: water quality valuation

description: This paper incorporates a rich set of physical water quality attributes, as well as site and household characteristics, into a model of recreational lake usage in Iowa. Our analysis shows individuals are responsive to physical water quality measures. Willingness-to-pay estimates are reported based on improvements in these measures.
SO2 Allowance Trading: How Experience and Expectations Measure Up
Creators: name: Bohi, Douglas R.
name: Burtraw, Dallas
name: Bohi, Douglas R.
name: Burtraw, Dallas
Publisher: name: Unknown
Year: 1997
Subjects: Environmental Economics and Policy

description: The SO2 trading program has achieved reductions in emissions ahead of schedule, with allowance prices below the marginal costs that were anticipated for the program. This paper explores the experience with the program and proposes a taxonomy of reasons why allowance prices are low. The overarching reason is that the most costly investments to accommodate full emission reductions have been successfully delayed. Application of a discount rate to these long run marginal costs yields an estimate of allowance price close to that observed today. Several factors have contributed to the delay in bearing these costs, and helped to reduce their magnitude. One group of factors stems from market fundamentals, especially the cost of rail transport of low sulfur coal. A second group includes the influences of state and federal regulators. A third group includes distinctions from the "imagined" program compared to that which was actually been enacted.
Prospects for Carbon Capture and Storage Technologies
Creators: name: Anderson, Soren T.
name: Newell, Richard G.
name: Anderson, Soren T.
name: Newell, Richard G.
Publisher: name: Unknown
Year: 2003
Subjects: subject: Environmental Economics and Policy
subject: carbon
subject: capture
subject: storage
subject: sequestration
subject: climate change
subject: technology

description: Carbon capture and storage (CCS) technologies remove carbon dioxide from flue gases for storage in geologic formations or the ocean. We find that CCS is technically feasible and economically attractive within the range of carbon policies discussed domestically and internationally. Current costs are about $200 to $250 per ton of carbon, although costs are sensitive to fuel prices and other assumptions and could be reduced significantly through technical improvements. Near-term prospects favor CCS for certain industrial sources and electric power plants, with storage in depleted oil and gas reservoirs. Deep aquifers may provide an attractive longer-term storage option, whereas ocean storage poses greater technical and environmental uncertainty. Vast quantities of economically recoverable fossil fuels, sizable political obstacles to their abandonment, and inherent delay associated with developing alternative energy sources suggest that CCS should be seriously considered in the portfolio of options for addressing climate change, alongside energy efficiency and carbon-free energy.