cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Sinosphaera Feng
Creators: name: Noble, Paula
name: Aitchison, Jonathan C.
name: Danelian, Taniel
name: Dumitrica, Paulian
name: Maletz, Jörg
name: Suzuki, Noritoshi
name: Cuvelier, Jessie
name: Caridroit, Martial
name: O'Dogherty, Luis
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Chromista
Radiozoa
Polycystina
Spumellaria
Xiphostylidae
Sinosphaera

description: Sinosphaera Feng in Feng, Gu, Jiang & Jin, 2004
 Sinosphaera Feng in Feng, Gu, Jiang & Jin, 2004: 137.
 TYPE SPECIES. — Sinosphaera spinosa Feng in Feng, Gu, Jiang & Jin, 2004 (Feng et al. 2004: 137, pl. 1, fig. 1-10, pl. 2, fig. 1-7, pl. 3, fig. 9-12).
AGE AND LOCATION OF TYPE MATERIAL. —Upper Changxingian (uppermost Permian), Dongpan section, Dalong Formation, Southern China.
TAXON CODE. — 120.
STATUS. — Valid.
 DIAGNOSIS. — “Test consists of a spherical to subspherical, doublelayered cortical shell. Both layers are spongy and connected by numerous beams. The outer layer is thicker than the inner one. Pores on both layers are irregularly arranged. Medullary shell and internal spicule are absent.” (Feng in Feng et al. 2004: 137).
description: Published as part of Noble, Paula, Aitchison, Jonathan C., Danelian, Taniel, Dumitrica, Paulian, Maletz, Jörg, Suzuki, Noritoshi, Cuvelier, Jessie, Caridroit, Martial & O'Dogherty, Luis, 2017, Taxonomy of Paleozoic radiolarian genera, pp. 419-502 in Geodiversitas 39 (3) on page 447, DOI: 10.5252/g2017n3a4, http://zenodo.org/record/5206585
The International Olive Oil Trade A network analysis
Creators: name: Casieri, Arturo
name: De Gennaro, Bernardo
name: Medicamento, Umberto
name: Casieri, Arturo
name: De Gennaro, Bernardo
name: Medicamento, Umberto
Publisher: name: Unknown
Year: 2013
Subjects: subject: Agribusiness
subject: Food Consumption/Nutrition/Food Safety
subject: Research Methods/ Statistical Methods
subject: olive oil
subject: international trade network.

description: Aim of this paper is to test weather or not the Network Analysis (NA) could possibly help to grasp Country level competitiveness in the International Trade Network (ITN) of a specific commodity. We focus over the positions that each Country occupies within the net of international trade exchanges assuming this could lead to competitive advantage. Starting from Ronald Burt's structural holes theory, we move forward analyzing the whole network evolution in the last years. We apply NA to the world network of valued exchange relationships of virgin olive oils building a 12 years time series of weighted directed networks (WDN).
GJ 1252 b: A 1.2 $R_{\oplus}$ planet transiting an M3-dwarf at 20.4 pc
Creators: name: Shporer, Avi
name: Collins, Karen A.
name: Astudillo-Defru, Nicola
name: Irwin, Jonathan
name: Bonfils, Xavier
name: Collins, Kevin I.
name: Matthews, Elisabeth
name: Winters, Jennifer G.
name: Anderson, David R.
name: Armstrong, James D.
name: Charbonneau, David
name: Cloutier, Ryan
name: Daylan, Tansu
name: Gan, Tianjun
name: Günther, Maximilian N.
name: Hellier, Coel
name: Horne, Keith
name: Huang, Chelsea X.
name: Jensen, Eric L. N.
name: Kielkopf, John
name: Palle, Enric
name: Sefako, Ramotholo
name: Stassun, Keivan G.
name: Tan, Thiam-Guan
name: Vanderburg, Andrew
name: Ricker, George R.
name: Latham, David W.
name: Vanderspek, Roland
name: Seager, Sara
name: Winn, Joshua N.
name: Jenkins, Jon M.
name: Colon, Knicole
name: Dressing, Courtney D.
name: Lépine, Sébastien
name: Muirhead, Philip S.
name: Rose, Mark E.
name: Twicken, Joseph D.
name: Villasenor, Jesus Noel
Publisher: name: arXiv
Year: 2019
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We report the discovery of GJ 1252 b, a planet with a radius of 1.193 $\pm$ 0.074 $R_{\oplus}$ and an orbital period of 0.52 days around an M3-type star (0.381 $\pm$ 0.019 $M_{\odot}$, 0.391 $\pm$ 0.020 $R_{\odot}$) located 20.385 $\pm$ 0.019 pc away. We use TESS data, ground-based photometry and spectroscopy, Gaia astrometry, and high angular resolution imaging to show that the transit signal seen in the TESS data must originate from a transiting planet. We do so by ruling out all false positive scenarios that attempt to explain the transit signal as originating from an eclipsing stellar binary. Precise Doppler monitoring also leads to a tentative mass measurement of 2.09 $\pm$ 0.56 $M_{\oplus}$. The host star proximity, brightness ($V$ = 12.19 mag, $K$ = 7.92 mag), low stellar activity, and the system's short orbital period make this planet an attractive target for detailed characterization, including precise mass measurement, looking for other objects in the system, and planet atmosphere characterization.
description: Accepted to ApJ Letters
The Agri-food Competitive Performance in the EU Countries: A Fifteen Years Retrospective
Creators: name: Carraresi, Laura
name: Banterle, Alessandro
name: Carraresi, Laura
name: Banterle, Alessandro
Publisher: name: Unknown
Year: 2013
Subjects: subject: Agribusiness
subject: Agricultural and Food Policy
subject: Food Consumption/Nutrition/Food Safety
subject: competitive performance
subject: agriculture
subject: food industry
subject: EU enlargement
subject: global economic crisis

description: The purpose of this paper is to evaluate the competitive performance of different European countries at sector level in the intra-EU market from 1995 to 2011, comparing food industry and agricultural sector. In particular, we aim to assess the effect of the EU enlargement (first period) and the economic crisis (second period) on the competitiveness of EU countries. The data come from the Eurostat database of international trade. The competitive performance of EU countries is measured through several trade indices, such as Export and Import Market Share, Revealed Comparative Advantage, Net Export Index, and Vollrath indices, analysing their values over the last fifteen years. Our analysis showed that, in the EU countries, agriculture and food industry do not reveal strong differences in competitive performance during the last fifteen years. Among big countries, France and Spain showed a continuous worsening competitive performance. A similar trend is found for Belgium. On the contrary, the Netherlands revealed the best performance, both in agriculture and in food industry, together with Italy. Nevertheless, the Netherlands has lightly lost specialisation because of a rise of total exports that have affected the value of RCA. Italy is characterised by a smaller increase, especially in the food sector. The only country showing a significant difference in competitive trends between agriculture and food industry is Germany. It became leader in the food industry of EU, with a growing performance over the period analysed, while it is not competitive nor specialised in agriculture. Among small countries, it is worth to highlight the performance of Austria.
On general relation between quantum ergodicity and fidelity of quantum dynamics
Creators: name: Prosen, Tomaz
Publisher: name: arXiv
Year: 2001
Subjects: subject: Quantum Physics (quant-ph)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: General relation is derived which expresses the fidelity of quantum dynamics, measuring the stability of time evolution to small static variation in the hamiltonian, in terms of ergodicity of an observable generating the perturbation as defined by its time correlation function. Fidelity for ergodic dynamics is predicted to decay exponentially on time-scale proportional to delta^(-2) where delta is the strength of perturbation, whereas faster, typically gaussian decay on shorter time scale proportional to delta^(-1) is predicted for integrable, or generally non-ergodic dynamics. This surprising result is demonstrated in quantum Ising spin-1/2 chain periodically kicked with a tilted magnetic field where we find finite parameter-space regions of non-ergodic and non-integrable motion in thermodynamic limit.
description: Slightly revised version, 4.5 RevTeX pages, 2 figures
Optimization over Degree Sequences of Graphs
Creators: name: Deza, Gabriel
name: Onn, Shmuel
Publisher: name: arXiv
Year: 2019
Subjects: subject: Optimization and Control (math.OC)
subject: Computational Complexity (cs.CC)
subject: Discrete Mathematics (cs.DM)
subject: Data Structures and Algorithms (cs.DS)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 05A, 15A, 51M, 52A, 52B, 52C, 62H, 68Q, 68R, 68U, 68W, 90B, 90C

description: We consider the problem of finding a subgraph of a given graph minimizing the sum of given functions at vertices evaluated at their subgraph degrees. While the problem is NP-hard already for bipartite graphs when the functions are convex on one side and concave on the other, we show that when all functions are convex, the problem can be solved in polynomial time for any graph. We also provide polynomial time solutions for bipartite graphs with one side fixed for arbitrary functions, and for arbitrary graphs when all but a fixed number of functions are either nondecreasing or nonincreasing. We note that the general factor problem and the (l,u)-factor problem over a graph are special cases of our problem, as well as the intriguing exact matching problem. The complexity of the problem remains widely open, particularly for arbitrary functions over complete graphs.
Spin Foam Models of Riemannian Quantum Gravity
Creators: name: Baez, John C.
name: Christensen, J. Daniel
name: Halford, Thomas R.
name: Tsang, David C.
Publisher: name: arXiv
Year: 2002
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Using numerical calculations, we compare three versions of the Barrett-Crane model of 4-dimensional Riemannian quantum gravity. In the version with face and edge amplitudes as described by De Pietri, Freidel, Krasnov, and Rovelli, we show the partition function diverges very rapidly for many triangulated 4-manifolds. In the version with modified face and edge amplitudes due to Perez and Rovelli, we show the partition function converges so rapidly that the sum is dominated by spin foams where all the spins labelling faces are zero except for small, widely separated islands of higher spin. We also describe a new version which appears to have a convergent partition function without drastic spin-zero dominance. Finally, after a general discussion of how to extract physics from spin foam models, we discuss the implications of convergence or divergence of the partition function for other aspects of a spin foam model.
description: 23 pages LaTeX; this version to appear in Classical and Quantum Gravity
On the Geometrical Character of Gravitation
Creators: name: Chryssomalakos, C.
name: Sudarsky, D.
Publisher: name: arXiv
Year: 2002
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The issue of whether some manifestations of gravitation in the quantum domain, are indicative or not of a non-geometrical aspect in gravitation is discussed. We examine some examples that have been considered in this context, providing a critical analysis of previous interpretations. The analysis of these examples is illustrative about certain details in the interpretation of quantum mechanics. We conclude that there are, at this time, no indications of such departure from the geometrical character of gravitation.
description: 10 pages. Submitted to General Relativity and Gravitation. V2: a misspelled reference corrected
Impacts of Improved Animal Welfare Standards on Competitiveness of EU Animal Production
Creators: name: Harvey, David
name: Hubbards, Carmen
name: Majewski, Edward
name: Malak-Rawlikowska, Agata
name: Harvey, David
name: Hubbards, Carmen
name: Majewski, Edward
name: Malak-Rawlikowska, Agata
Publisher: name: Unknown
Year: 2013
Subjects: subject: Agribusiness
subject: Food Consumption/Nutrition/Food Safety
subject: Industrial Organization
subject: Research Methods/ Statistical Methods
subject: animal welfare
subject: upgraded standards
subject: cost and benefits
subject: Agmemod
subject: trade implications
subject: competitiveness
subject: chain.

description: The paper presents results of the FP7 Econ-Welfare Project “Assessing the socio-economic consequences of measures promoting good animal welfare”. The paper illustrates the economic consequences at the farm level of indicative improvements in animal welfare conditions for pigs and cattle and addresses the consequences of improved animal welfare for international trade and competitiveness1. For the farm level considerations costs - effectiveness analysis was applied, whilst impacts of the upgraded standards on international trade and competitiveness was assessed with the use of the partial equilibrium Agmemod model. The Belief Network Approach was used to determine the effects of animal welfare standards and labels on the competitiveness of the EU animal production and supply chain. Introducing upgraded Animal Welfare standards at the farm level would increase costs of production in pigs and beef cattle sectors. In dairy sector upgrading cows welfare standards results with higher benefits than costs. Accordingly, Agmemod results indicate that on the pork and beef markets international competitive position of the EU producers may be undermined. However, as the analysis showed, there are both supply conditions and demand side circumstances which may well resolve the apparent conflict between animal welfare and chain competitiveness. On the supply side, it is apparent that there are some animal welfare improvements that can be made without compromising competitiveness. Supply chain information, education and training may well be able to improve both animal welfare and competitiveness. In addition, better understanding of both animal welfare and animal productivity (through R&D) can be expected to lead to improvements in both objectives.
Anomalous Hall effect mechanisms in quasi-2D van der Waals ferromagnet Fe0.29TaS2
Creators: name: Cai, Ranran
name: Xing, Wenyu
name: Zhou, Huibin
name: Li, Boning
name: Chen, Yangyang
name: Yao, Yunyan
name: Ma, Yang
name: Xie, X. C.
name: Jia, Shuang
name: Han, Wei
Publisher: name: arXiv
Year: 2019
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The recent emergence of two-dimensional (2D) van der Waals ferromagnets has provided a new platform for exploring magnetism in the flatland and for designing 2D ferromagnet-based spintronics devices. Despite intensive studies, the anomalous Hall effect (AHE) mechanisms in 2D van der Waals ferromagnets have not been investigated yet. In this paper, we report the AHE mechanisms in quasi-2D van der Waals ferromagnet Fe0.29TaS2 via systematically measuring Fe0.29TaS2 devices with thickness from 14 nm to bulk single crystal. The AHE mechanisms are investigated via the scaling relationship between the anomalous Hall and channel conductivities. As the Fe0.29TaS2 thickness decreases, the major AHE mechanism changes from extrinsic scattering to intrinsic contribution. The crossover of the AHE mechanisms is found to be highly associated with the channel conductivities as the Fe0.29TaS2 thickness varies.
description: Main paper: 20 pages, 6 figures. Supplementary materials: 10 figures
On the multiplicity and regularity index of toric curves
Creators: name: Duarte, Daniel
name: Sandoval, Alondra Ramírez
Publisher: name: arXiv
Year: 2019
Subjects: subject: Commutative Algebra (math.AC)
subject: FOS: Mathematics

description: In this note we revisit the problem of determining combinatorially the multiplicity at the origin of a toric curve. In addition, we give the exact value of the regularity index of that point for plane toric curves and effective bounds for this number for arbitrary toric curves.
Imperfect Competition in the Italian Dairy Chain: Consequences for the Price Transmission and Welfare Distribution
Creators: name: Rosa, Franco
name: Vasciaveo, Michaela
name: Rosa, Franco
name: Vasciaveo, Michaela
Publisher: name: Unknown
Year: 2013
Subjects: subject: Agribusiness
subject: Farm Management
subject: Research Methods/ Statistical Methods
subject: dairy chain
subject: imperfect competition
subject: successive oligopoly
subject: price transmission
subject: welfare

description: The milk quotas were introduced in Italy in 1984; from that time onward, the dairy chain has progressed in technology and organization with consequences for the market competition. The Aglink-Cosimo simulations suggest milk production will return to an increasing path, driven by a fairly optimistic demand outlook for the improved macroeconomic 2020 future prospects in the EU-27 economies and milk production will exceed the present level by about 3%. Milk deliveries would be expected to increase in Italy by a slightly higher rate, according with the consumption trend of dairy products. Purpose of this paper is to analyze the consequences of structural adjustments of the dairy chain for the competitive price setting assuming the retailers and processors having the control on the market prices, causing changes on the welfare distribution. The analysis is based on derived demand and price-transmission equations, using a successive oligopoly model. The conjectural hypothesis about the players provides the framework for estimating the degrees of price transmission in a dynamic setting with agents at the industry and retail levels (rather than firm) are acting as two oligopoly players. The conjectures about the oligopoly depending on the structure (number of competitors, size and degree of collusion), across the vertical stages of the dairy chain allow to simulate different degrees of market imperfection reflected on the price transmission and welfare distribution. (Dhar and Cotterill, 2000; McCorriston and Scheldon, 96; Morgan and Rayner, 1988). Six simulations for price transmission and ten simulations for welfare distribution are performed assuming different collusive patterns and results are used to check for the market efficiency hypothesis.
Economic Impact of Integration in the Food Supply Chain
Creators: name: Jarzebowski, Sebastian
name: Bezat-Jarzębowska, Agnieszka
name: Klepacki, Bogdan
name: Jarzebowski, Sebastian
name: Bezat-Jarzębowska, Agnieszka
name: Klepacki, Bogdan
Publisher: name: Unknown
Year: 2013
Subjects: subject: Agribusiness
subject: Food Consumption/Nutrition/Food Safety
subject: Industrial Organization
subject: Production Economics
subject: integration
subject: food supply chain
subject: economic performance
subject: Stochastic Frontier Analysis

description: Due to the nature of the food supply chain an important aspect in the context of increasing the efficiency of agri-food companies may be an increase of the integration's degree in the chain. Therefore, exploring the relationships among these variables was found as an important research area and adopted as the goal of the paper. The paper is focused mainly on the theoretical background showing relationship between integration and performance. A description of the theoretical and methodological aspects of performance measurement and its extension (including the integration aspect) was also made in the paper. For an empirical illustration of the analyzed relationships two steps will be made. Firstly, the integration's degree in the food chain was measured. Secondly, the efficiency of the companies from the cereals processing industry in Europe was assessed. The SFA models (e.g. trans-logarithmic and Cobb-Douglas functional form) were used for assessment of efficiency. By using stochastic method (e.g. the SFA), one may show the influence of external variable (the integration in the supply chain) on the economic performance of enterprises.
Constraining X-ray Coronal Size with Transverse Motion of AGN Ultra-Fast Outflows
Creators: name: Fukumura, Keigo
name: Tombesi, Francesco
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: One of the canonical physical properties of ultra-fast outflows (UFOs) seen in a diverse population of active galactic nuclei (AGNs) is its seemingly very broad width (i.e. $Δv \sim 10,000$ km~s$^{-1}$) , a feature often required for X-ray spectral modeling. While unclear to date, this condition is occasionally interpreted and justified as internal turbulence within the UFOs for simplicity. In this work, we exploit a transverse motion of a three-dimensional accretion-disk wind, an essential feature of non-radial outflow morphology unique to magnetohydrodynamic (MHD) outflows. We argue that at least part of the observed line width of UFOs may reflect the degree of transverse velocity gradient due to Doppler broadening around a putative compact X-ray corona in the proximity of a black hole. In this scenario, line broadening is sensitive to the geometrical size of the corona, $R_c$. We calculate the broadening factor as a function of coronal radius $R_c$ and velocity smearing factor $f_{\rm sm}$ at a given plasma position. We demonstrate, as a case study of the quasar, PDS~456, that the spectral analysis favors a compact coronal size of $R_c /R_g \lesssim 10$ where $R_g$ is gravitational radius. Such a compact corona is long speculated from both X-ray reverberation study and the lamppost model for disk emission also consistent with microlensing results. Combination of such a transverse broadening around a small corona can be a direct probe of a substantial rotational motion perhaps posing a serious challenge to radiation-driven wind viewpoint.
description: 15 pages, 5 figures, 1 table; accepted to ApJ Letters
Clean Energy Industries and rare Earth Materials: Economic and Financial Issues
Creators: name: Baldi, Lucia
name: Peri, Massimo
name: Vandone, Daniela
name: Baldi, Lucia
name: Peri, Massimo
name: Vandone, Daniela
Publisher: name: Unknown
Year: 2013
Subjects: subject: Agribusiness
subject: Agricultural and Food Policy
subject: Financial Economics
subject: Food Consumption/Nutrition/Food Safety
subject: Production Economics
subject: Risk and Uncertainty
subject: Clean energy
subject: rare earth materials
subject: stock prices

description: In the last few years Rare Earth Materials (REMs) prices have experienced a strong increase, due to geopolitical policies and sustainability issues. Provided that these materials at risk of supply disruptions are largely employed in the development of new technologies - such as clean energy industries - financial markets may already have included these concerns into clean energy companies evaluation. We use a multifactor market model for the period January 2006-September 2012 to analyse the impact of REMs price changes – specifically Dysprosium and Neodymium - to six clean energy indexes (NYSE-BNEF) tracking the world’s most active quoted companies in the clean energy sector. Results show that during period of price increase there is a negative relation between REMs price changes and the stock market performance of clean energy indexes, specifically wind. The European clean energy index is also negatively affected and this may be relevant to policy makers considering that Europe is putting in place some relevant policy actions to support the development of the clean energy sector.
Diffractive Vector Meson Production with a Large Momentum Transfer
Creators: name: Enberg, Rikard
name: Forshaw, Jeff
name: Motyka, Leszek
name: Poludniowski, Gavin
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We summarise recent progress in the computation of helicity amplitudes for diffractive vector meson production at large momentum transfer and their comparison to data collected at the HERA collider.
description: Talk presented at EPS2003, Aachen, July 2003. 4 pages
Can quantum chaos enhance stability of quantum computation?
Creators: name: Prosen, Tomaz
name: Znidaric, Marko
Publisher: name: arXiv
Year: 2001
Subjects: subject: Quantum Physics (quant-ph)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We consider stability of a general quantum algorithm with respect to a fixed but unknown residual interaction between qubits, and show a surprising fact, namely that the average fidelity of quantum computation increases by decreasing average time correlation function of the perturbing operator in sequences of consecutive quantum gates. Our thinking is applied to the quantum Fourier transformation where an alternative 'less regular' quantum algorithm is devised which is qualitatively more robust against static random residual n-qubit interaction.
description: 4 pages, 5 eps figures (3 color)
Broadband polarization rotator with tunable rotation angle composed of three wave-plates
Creators: name: Al-Mahmoud, Mouhamad
name: Coda, Virginie
name: Rangelov, Andon
name: Montemezzani, Germano
Publisher: name: arXiv
Year: 2019
Subjects: subject: Optics (physics.optics)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: A simple scheme for a broadband polarization rotator with tunable rotation angle is proposed and verified experimentally. The rotator consists of only three wave-plates, one of which is a full-wave plate. The robust approach inspired by the composite pulses analogy allows to compensate the wave-plate dispersion in large extent.
Influences of Social Networks on Food Choices: A Comparison of Local, Regional, and National Perspectives
Creators: name: Liang, Chyi-Lyi (Kathleen)
name: Pescatore, Matthew
name: Liang, Chyi-Lyi (Kathleen)
name: Pescatore, Matthew
Publisher: name: Unknown
Year: 2014
Subjects: subject: Food Consumption/Nutrition/Food Safety
subject: Marketing
subject: FOS: Economics and business

description: There has been a growing interest in the U.S. to study local and regional food systems with respect to economic, social, and enterprise development. This paper discusses a series of on-going projects funded by the USDA focusing on two aspects of the relationships between social network and food choices – producers, and interactions between producers and consumers (buyers). Preliminary results showed distribution and opportunities for agricultural producers to exploit and implement new strategies that would enhance marketing and management by taking advantage of the capacity of social/economic networks in/around communities. Long-term goal on completion these studies will compare and contrast local, regional, and national approaches to design and implement effective marketing and management strategies that aim to promote local/regional food networks from social, economic, and ecological perspectives.
Anisotropic velocity distributions in 3D dissipative optical lattices
Creators: name: Jersblad, Johan
name: Ellmann, Harald
name: Sanchez-Palencia, Laurent
name: Kastberg, Anders
Publisher: name: arXiv
Year: 2003
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a direct measurement of velocity distributions in two dimensions by using an absorption imaging technique in a 3D near resonant optical lattice. The results show a clear difference in the velocity distributions for the different directions. The experimental results are compared with a numerical 3D semi-classical Monte-Carlo simulation. The numerical simulations are in good qualitative agreement with the experimental results.
description: Accepted for publication in Eur. Phys. J., "Special issue: Quantum fluctuations and coherence in optical and atomic structures" (2003)
Numerical analysis of lock-in thermography applied to solid oxide cells
Creators: name: Jeanmonod, Guillaume
Publisher: name: Zenodo
Year: 2021

description: The presentation reports the results of the numerical analysis of lock-in thermography applied to the electrochemical model of the SWITCH solid oxide cells. The analysis shows the thermal response for inlet (dominated by 𝑗 -> electrochemistry) and outlet (dominated by ℎ! -> reactant composition), it extends the optimal frequency range for LT analysis from 10 mHz to 1 Hz. The results proves that electrolysis operation is less favorable for LT measurements and that LT is an additional tool for validating numerical model.
Principal Component Analysis Using Structural Similarity Index for Images
Creators: name: Ghojogh, Benyamin
name: Karray, Fakhri
name: Crowley, Mark
Publisher: name: arXiv
Year: 2019
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Despite the advances of deep learning in specific tasks using images, the principled assessment of image fidelity and similarity is still a critical ability to develop. As it has been shown that Mean Squared Error (MSE) is insufficient for this task, other measures have been developed with one of the most effective being Structural Similarity Index (SSIM). Such measures can be used for subspace learning but existing methods in machine learning, such as Principal Component Analysis (PCA), are based on Euclidean distance or MSE and thus cannot properly capture the structural features of images. In this paper, we define an image structure subspace which discriminates different types of image distortions. We propose Image Structural Component Analysis (ISCA) and also kernel ISCA by using SSIM, rather than Euclidean distance, in the formulation of PCA. This paper provides a bridge between image quality assessment and manifold learning opening a broad new area for future research.
description: Paper for the methods named "Image Structural Component Analysis (ISCA)" and "Kernel Image Structural Component Analysis (Kernel ISCA)"
Additional file 2: of The complete mitochondrial genome of the early flowering plant Nymphaea colorata is highly repetitive with low recombination
Creators: name: Dong, Shanshan
name: Zhao, Chaoxian
name: Chen, Fei
name: Liu, Yanhui
name: Zhang, Shouzhou
name: Wu, Hong
name: Zhang, Liangsheng
name: Liu, Yang
Publisher: name: figshare
Year: 2018
Subjects: subject: Biochemistry
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Evolutionary Biology
subject: Environmental Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Plant Biology
subject: Virology

description: Figure S3. The DNA and RNA coverage plots of the cox2 gene of the mitochondrial genome of Nymphaea colorata. (PDF 139 kb)
On the SO(2,1) symmetry in General Relativity
Creators: name: Vilasi, Gaetano
name: Vitale, Patrizia
Publisher: name: arXiv
Year: 2002
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The role of the SO(2,1) symmetry in General Relativity is analyzed. Cosmological solutions of Einstein field equations invariant with respect to a space-like Lie algebra G_r, with r between 3 and 6 and containing so(2,1) as a subalgebra, are also classified.
description: 10 pages, latex, no figures
Locally Linear Image Structural Embedding for Image Structure Manifold Learning
Creators: name: Ghojogh, Benyamin
name: Karray, Fakhri
name: Crowley, Mark
Publisher: name: arXiv
Year: 2019
Subjects: subject: Machine Learning (stat.ML)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: Image and Video Processing (eess.IV)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Most of existing manifold learning methods rely on Mean Squared Error (MSE) or $\ell_2$ norm. However, for the problem of image quality assessment, these are not promising measure. In this paper, we introduce the concept of an image structure manifold which captures image structure features and discriminates image distortions. We propose a new manifold learning method, Locally Linear Image Structural Embedding (LLISE), and kernel LLISE for learning this manifold. The LLISE is inspired by Locally Linear Embedding (LLE) but uses SSIM rather than MSE. This paper builds a bridge between manifold learning and image fidelity assessment and it can open a new area for future investigations.
description: This is the paper for the methods named "Locally Linear Image Structural Embedding (LLISE)" and "Kernel Locally Linear Image Structural Embedding (Kernel LLISE)"
A comparison of some conformal quantile regression methods
Creators: name: Sesia, Matteo
name: Candès, Emmanuel J.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Methodology (stat.ME)
subject: Statistics Theory (math.ST)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: We compare two recently proposed methods that combine ideas from conformal inference and quantile regression to produce locally adaptive and marginally valid prediction intervals under sample exchangeability (Romano et al., 2019; Kivaranovic et al., 2019). First, we prove that these two approaches are asymptotically efficient in large samples, under some additional assumptions. Then we compare them empirically on simulated and real data. Our results demonstrate that the method in Romano et al. (2019) typically yields tighter prediction intervals in finite samples. Finally, we discuss how to tune these procedures by fixing the relative proportions of observations used for training and conformalization.
description: 20 pages, 9 figures, 3 tables
Optimal Strategies for Sinusoidal Signal Detection
Creators: name: Allen, Bruce
name: Papa, Maria Alessandra
name: Schutz, Bernard F.
Publisher: name: arXiv
Year: 2002
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We derive and study optimal and nearly-optimal strategies for the detection of sinusoidal signals hidden in additive (Gaussian and non-Gaussian) noise. Such strategies are an essential part of algorithms for the detection of the gravitational Continuous Wave (CW) signals produced by pulsars. Optimal strategies are derived for the case where the signal phase is not known and the product of the signal frequency and the observation time is non-integral.
description: 18 pages, REVTEX4, 7 figures, 2 tables
The nature of the broadband X-ray variability in the dwarf Seyfert galaxy NGC 4395
Creators: name: Kammoun, E. S.
name: Nardini, E.
name: Zoghbi, A.
name: Miller., J. M.
name: Cackett, E. M.
name: Gallo, E.
name: Reynolds, M. T.
name: Risaliti, G.
name: Barret, D.
name: Brandt, W. N.
name: Brenneman, L. W.
name: Kaastra, J. S.
name: Koss, M.
name: Lohfink, A. M.
name: Mushotzky, R. F.
name: Raymond, J.
name: Stern, D.
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a flux-resolved X-ray analysis of the dwarf Seyfert 1.8 galaxy NGC 4395, based on three archival $XMM-Newton$ and one archival $NuSTAR$ observations. The source is known to harbor a low mass black hole ($\sim 10^4- {\rm a~ few~}\times 10^{5}~\rm M_\odot$) and shows strong variability in the full X-ray range during these observations. We model the flux-resolved spectra of the source assuming three absorbing layers: neutral, mildly ionized, and highly ionized ($N_{\rm H} \sim 1.6\times 10^{22}-3.4 \times 10^{23}~\rm cm^{-2}$, $\sim 0.8-7.8 \times 10^{22}~\rm cm^{-2}$, and $ 3.8 \times 10^{22}~\rm cm^{-2}$, respectively. The source also shows intrinsic variability by a factor of $\sim 3$, on short timescales, due to changes in the nuclear flux, assumed to be a power law ($Γ= 1.6-1.67$). Our results show a positive correlation between the intrinsic flux and the absorbers' ionization parameter. The covering fraction of the neutral absorber varies during the first $XMM-Newton$ observation, which could explain the pronounced soft X-ray variability. However, the source remains fully covered by this layer during the other two observations, largely suppressing the soft X-ray variability. This suggests an inhomogeneous and layered structure in the broad line region. We also find a difference in the characteristic timescale of the power spectra between different energy ranges and observations. We finally show simulated spectra with $XRISM$, $Athena$, and $eXTP$, which will allow us to characterize the different absorbers, study their dynamics, and will help us identify their locations and sizes.
description: Accepted for publication in ApJ
Magnisphaera Won 1997
Creators: name: Noble, Paula
name: Aitchison, Jonathan C.
name: Danelian, Taniel
name: Dumitrica, Paulian
name: Maletz, Jörg
name: Suzuki, Noritoshi
name: Cuvelier, Jessie
name: Caridroit, Martial
name: O'Dogherty, Luis
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Fungi
Ascomycota
Sordariomycetes
Microascales
Halosphaeriaceae
Magnisphaera

description: Magnisphaera Won, 1997
 Magnisphaera Won, 1997a: 366.
 TYPE SPECIES. — Magnisphaera gigantea Won, 1997 (Won 1997a: 368, pl. 6, fig. 3-5).
AGE AND LOCATION OF TYPE MATERIAL. — Frasnian (Upper Devonian), Gogo Formation, Western Australia.
TAXON CODE. — 100.
STATUS. — Valid.
DIAGNOSIS. — “A very large skeleton with two shells; the outer shell consisting of a polygonal (four-to eight-sided) or irregular lattice that is extremely loose, completely two-dimensional, partly or wholly three-dimensional, or incompletely latticed; straight or drooping bars forming meshwork; an irregularly latticed inner shell; the eight-rayed internal spicule with a median bar, no inner apophyses, with or without outer apophyses.” (Won 1997a: 366).
description: Published as part of Noble, Paula, Aitchison, Jonathan C., Danelian, Taniel, Dumitrica, Paulian, Maletz, Jörg, Suzuki, Noritoshi, Cuvelier, Jessie, Caridroit, Martial & O'Dogherty, Luis, 2017, Taxonomy of Paleozoic radiolarian genera, pp. 419-502 in Geodiversitas 39 (3) on page 443, DOI: 10.5252/g2017n3a4, http://zenodo.org/record/5206585
Wetlands Retention and Optimal Management of Waterfowl Habitat under Climate Change
Creators: name: Withey, Patrick
name: Van Kooten, G. Cornelis
name: Withey, Patrick
name: Van Kooten, G. Cornelis
Publisher: name: Unknown
Year: 2014
Subjects: subject: Environmental Economics and Policy
subject: biofuels
subject: climate change
subject: land-use change
subject: positive mathematical programming
subject: prairie pothole region
subject: wetlands conservation

description: We develop a positive mathematical programming model to investigate the impact of climate change on land use in the prairie pothole region of western Canada, with particular focus on wetlands retention. We examine the effect of climate change and biofuel policies that are implemented to mitigate climate change on wetlands retention. Simulation results indicate that a drier climate could decrease wetlands by as much as 38% if the externality benefits of wetlands are considered, but by nearly 80% if they are not. Reductions in wetlands are most pronounced in the south-central areas of the region.
Geometric properties of SIC-POVM tensor square
Creators: name: Ostrovskyi, Vasyl
name: Yakymenko, Danylo
Publisher: name: arXiv
Year: 2019
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: 20C35, 81P15, 81R05

description: It's known that if $d^2$ vectors from $d$-dimensional Hilbert space $H$ form a SIC-POVM (SIC for short) then tensor square of those vectors form an equiangular tight frame on the symmetric subspace of $H\otimes H$. We prove that for any SIC of WH-type (Weyl-Heisenberg group covariant) this squared frame can be obtained as a projection of WH-type basis of $H\otimes H$ onto the symmetric subspace. We give a full description of the set of all WH-type bases, so this set could be used as a search space for SIC solutions. Also we show that a particular element of this set is close to a SIC solution in some structural sense. Finally we give a geometric construction of a SIC-related symmetric tight fusion frames that were discovered in odd dimensions.
Reference-Dependent Preferences in Gulf of Mexico Shrimpers' Fishing Effort Decision
Creators: name: Ran, Tao
name: Keithly, Walter R.
name: Yue, Chengyan
name: Ran, Tao
name: Keithly, Walter R.
name: Yue, Chengyan
Publisher: name: Unknown
Year: 2014
Subjects: subject: Productivity Analysis
subject: fishing time
subject: Gulf of Mexico shrimpers
subject: reference-dependent preferences
subject: survival analysis
subject: travel time

description: This paper provides empirical evidence that reference-dependent preferences help to explain the amount of effort exerted by shrimpers in the Gulf of Mexico. Using survival analysis, the authors find that shrimpers tend to prolong their trip when their current trip revenue goal remains unattained. Furthermore, this tendency became more pronounced after 2001 in association with a significant decline in the shrimp price. This may partially explain the less obvious decrease in fleet effort vis-à-vis sharp decline in fleet size following the price change.
2013WAEA Keynote Address: Strategies for Overcoming Hypothetical Bias in Stated Preference Surveys
Creators: name: Loomis, John B.
name: Loomis, John B.
Publisher: name: Unknown
Year: 2014
Subjects: subject: Research Methods/ Statistical Methods
subject: choice experiments
subject: conjoint
subject: contingent valuation
subject: hypothetical bias
subject: meta-analysis
subject: nonmarket valuation
subject: stated preference methods

description: In some, but not all, contexts, respondents to stated preference valuation studies state a willingness to pay (WTP) higher than what lab or field experiments indicate is the actual amount they would pay. However, several ex ante survey design strategies and ex post calibration techniques can be used to minimize or eliminate hypothetical bias. This article reviews and presents evidence on the effectiveness of these ex ante and ex post approaches. The ex ante approaches lead to recommendations to modify survey designs to minimize the bias up front. If the analyst desires, ex post calibration of WTP using certainty scales can be used to reduce stated WTP to the point at which it will match actual cash contributions.
Additional file 1 of Transcriptomic analysis reveals that Bacillomycin D-C16 induces multiple pathways of disease resistance in cherry tomato
Creators: name: Xue, Yingying
name: Sun, Jing
name: Lu, Fengxia
name: Bie, Xiaomei
name: Li, Yuanhong
name: Lu, Yingjian
name: Lu, Zhaoxin
name: Lin, Fuxing
Publisher: name: figshare
Year: 2023
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Plant Biology

description: Additional file 1: Table S1. Overview of the transcriptome sequencing dataset and quality check.
Quantum Hall states on the cylinder as unitary matrix Chern-Simons theory
Creators: name: Polychronakos, Alexios P.
Publisher: name: arXiv
Year: 2001
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Condensed Matter (cond-mat)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: We propose a unitary matrix Chern-Simons model representing fractional quantum Hall fluids of finite extent on the cylinder. A mapping between the states of the two systems is established. Standard properties of Laughlin theory, such as the quantization of the inverse filling fraction and of the quasiparticle number, are reproduced by the quantum mechanics of the matrix model. We also point out that this system is holographically described in terms of the one-dimensional Sutherland integrable particle system.
description: 25 pages; final version to appear in JHEP
Association between Total Diet Cost and Diet Quality Is Limited
Creators: name: Carlson, Andrea
name: Dong, Diansheng
name: Lino, Mark
name: Carlson, Andrea
name: Dong, Diansheng
name: Lino, Mark
Publisher: name: Unknown
Year: 2014
Subjects: subject: Food Consumption/Nutrition/Food Safety
subject: cost of food
subject: diet quality
subject: HEI-2005
subject: NHANES
subject: random-effects model

description: There is a common perception that it costs more to eat a healthy diet than a less healthy one. We derive a panel data model that accounts for unobserved specific individual effects to estimate the relationship between diet quality and total daily food expenditure. Since total daily diet cost and diet quality are both calculated from the foods chosen in our data, we account for the fact that there is an endogenous relationship between diet quality and cost. We find that while total daily food expenditure is statistically significant in relation to diet quality, the degree of association is very small.
A Precision Measurement of the Neutron Scattering Length of He-4 Using Neutron Interferometry
Creators: name: Haun, R.
name: Wietfeldt, F. E.
name: Arif, M.
name: Huber, M. G.
name: Black, T. C.
name: Heacock, B.
name: Pushin, D. A.
name: Shahi, C. B.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We report a 0.08 % measurement of the bound neutron scattering length of $^4$He using neutron interferometry. The result is $b = (3.0982 \pm 0.0021 \mbox{ [stat]} \pm 0.0014 \mbox{ [sys]}) \mbox{ fm}$. The corresponding free atomic scattering length is $a = (2.4746 \pm 0.0017 \mbox{ [stat]} \pm 0.0011 \mbox{ [sys]}) \mbox{ fm}$. With this result the world average becomes $b = (3.0993 \pm 0.0025)$ fm, a 2 % downward shift and a reduction in uncertainty by more than a factor of six. Our result is in disagreement with a previous neutron interferometric measurement but is in good agreement with earlier measurements using neutron transmission.
On star edge colorings of bipartite and subcubic graphs
Creators: name: Casselgren, Carl Johan
name: Granholm, Jonas B.
name: Raspaud, André
Publisher: name: arXiv
Year: 2019
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C15

description: A star edge coloring of a graph is a proper edge coloring with no $2$-colored path or cycle of length four. The star chromatic index $χ'_{st}(G)$ of $G$ is the minimum number $t$ for which $G$ has a star edge coloring with $t$ colors. We prove upper bounds for the star chromatic index of complete bipartite graphs; in particular we obtain tight upper bounds for the case when one part has size at most $3$. We also consider bipartite graphs $G$ where all vertices in one part have maximum degree $2$ and all vertices in the other part has maximum degree $b$. Let $k$ be an integer ($k\geq 1$), we prove that if $b=2k+1$ then $χ'_{st}(G) \leq 3k+2$; and if $b=2k$, then $χ'_{st}(G) \leq 3k$; both upper bounds are sharp. Finally, we consider the well-known conjecture that subcubic graphs have star chromatic index at most $6$; in particular we settle this conjecture for cubic Halin graphs.
description: 18 pages