cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Information transfer through a one-atom micromaser
Creators: name: Datta, Animesh
name: Ghosh, Biplab
name: Majumdar, A. S.
name: Nayak, N.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We consider a realistic model for the one-atom micromaser consisting of a cavity maintained in a steady state by the streaming of two-level Rydberg atoms passing one at a time through it. We show that it is possible to monitor the robust entanglement generated between two successive experimental atoms passing through the cavity by the control decoherence parameters. We calculate the entanglement of formation of the joint two-atom state as a function of the micromaser pump parameter. We find that this is in direct correspondence with the difference of the Shannon entropy of the cavity photons before and after the passage of the atoms for a reasonable range of dissipation parameters. It is thus possible to demonstrate information transfer between the cavity and the atoms through this set-up.
description: Revtex, 5 pages, 2 encapsulated ps figures; added discussion on information transfer in relation with cavity photon statistics; typos corrected; Accepted for Publicaiton in Europhysics Letters
Linear response study of collisionless spin drag
Creators: name: Romito, Donato
name: Lobo, Carlos
name: Recati, Alessio
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: In this work we are concerned with the understanding of the collisionless drag or entrainment between two superfluids, also called Andreev-Bashkin effect, in terms of current response functions. The drag density is shown to be proportional to the cross transverse current-current response function, playing the role of a normal component for the single species superfluid density. We can in this way link the existence of finite entrainment with the exhaustion of the energy-weighted sum rule in the spin channel. The formalism is then used to reproduce some known results for a weakly interacting Bose-Bose mixture. Finally we include the drag effect to determine the beyond mean-field correction on the speed of sound and on the spin dipole excitations for a homogeneous and trapped gas, respectively.
description: 12 pages, 3 figures
Localisation de l'agriculture biologique et accès aux marchés
Location of organic agriculture and access to markets
Creators: name: ALLAIRE, Gilles
name: CAHUZAC, Eric
name: MAIGNE, Elise
name: POMEON, Thomas
name: ALLAIRE, Gilles
name: CAHUZAC, Eric
name: MAIGNE, Elise
name: POMEON, Thomas
Publisher: name: Unknown
Year: 2807
Subjects: subject: Environmental Economics and Policy
subject: agriculture biologique
subject: conventionnalisation
subject: agglomération
subject: localisation des activités
subject: circuits courts
subject: économétrie spatiale

description: L’objectif de cet article est de contribuer à l’analyse des implications sur la localisation du développement de l’Agriculture biologique (AB), souvent analysé en termes de « conventionnalisation ». La localisation de l’AB en France présente des contrastes à différentes échelles, régions, départements et localités, qui se reflètent dans des phénomènes de dépendances spatio-temporelles, variables selon la localisation. Nous mettons aussi en évidence un effet complexe du réseau urbain sur la localisation de l’AB, dépendant de la taille des villes, qui attirent les producteurs en AB, pour lesquels elles constituent un débouché direct, et en même temps les repoussent, du fait des limites de l’accès au foncier. Au total, une différenciation des dynamiques apparaît : une diffusion spatiale résultant d’une plus large diffusion des produits de l’AB dans les circuits de distribution alimentaire et de la demande qui en résulte de la part des acteurs de l’aval, une concentration liée à la proximité des consommateurs reposant sur des marchés de producteurs et des circuits courts.
A Capture Scenario for Globular Cluster Omega Centauri
Creators: name: Tsuchiya, Toshio
name: Dinescu, Dana I.
name: Korchagin, Vladimir I.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We explore an accretion origin for Omega Cen by N-body modeling of the orbital decay and disruption of a Milky-Way dwarf satellite. This work is focused on studying a particular satellite model that aims to reproduce the present orbit of Omega Cen, as recently determined from absolute proper motions. The model satellite is launched from 58 kpc from the Galactic Center, on a radial, low-inclination orbit. We find that a capture scenario can produce an Omega Cen-like object with the current low-energy orbit of the cluster. Our best model is a nucleated galaxy with a Hernquist density profile that has a mass of 8 10**8 Msun, and a half-mass radius of 1.4 kpc.
description: 15 pages, 5 figures, accepted by ApJL
Quels type d'éco-aquaculteurs face à l'intensification écologique ? L'exemple de l'aquaculture en étang en France et au Brésil
What types of eco-fish-farmer emerge in the face of ecological intensification? The case of pond fish farming in France and Brazil
Creators: name: REY-VALETTE, Helene
name: MATHE, Syndhia
name: CHIA, Eduardo
name: AUBIN, Joel
name: REY-VALETTE, Helene
name: MATHE, Syndhia
name: CHIA, Eduardo
name: AUBIN, Joel
Publisher: name: Unknown
Year: 2807
Subjects: subject: Environmental Economics and Policy
subject: intensification écologique
subject: apprentissage
subject: éco-innovation
subject: aquaculture
subject: France
subject: Brésil

description: Le développement spectaculaire de l’aquaculture est aujourd’hui confronté au défi du développement durable. Une approche par les types d’éco-innovations est mobilisée ici à propos de nouvelles logiques de production, relevant de l’intensification écologique. L’objectif est de caractériser quelques-uns des facteurs déterminants des changements en faveur de l’intensification écologique dans le cas de l’aquaculture d’étang en France et au Brésil. La revue de la littérature nous a permis d’identifier trois profils d’éco-innovation : i) maîtrise des rejets et substitution des intrants ; ii) changements organisationnels et institutionnels des modes de production et iii) prise en compte des services écosystémiques. Ces profils ont été croisés avec la typologie des aquaculteurs d’étang élaborée à partir d’enquêtes en France (Brenne et Lorraine) et au Brésil (dans la Province de Santa Catarina dans la Haute Vallée de l’Itajai et à Chapeco). Les trois groupes identifiés caractérisent différents itinéraires d’appropriation des éco-innovations. Ces itinéraires sont fonction des apprentissages à la fois techniques, informationnels et organisationnels, mais aussi des pratiques initiales, du niveau d’information des exploitants et du contexte institutionnel.
Transport Coefficients of Gluon Plasma
Creators: name: Nakamura, Atsushi
name: Sakai, Sunao
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Transport coefficients of gluon plasma are calculated for a SU(3) pure gauge model by lattice QCD simulations on $16^3 \times 8$ and $24^3 \times 8$ lattices. Simulations are carried out at a slightly above the deconfinement transition temperature $T_c$, where a new state of matter is currently being pursued in RHIC experiments. Our results show that the ratio of the shear viscosity to the entropy is less than one and the bulk viscosity is consistent with zero in the region, $1.4 \leq T/T_c \leq 1.8 $.
description: 10 pages, Latex
An optic to replace space and its application towards ultra-thin imaging systems
Creators: name: Reshef, Orad
name: DelMastro, Michael P.
name: Bearne, Katherine K. M.
name: Alhulaymi, Ali H.
name: Giner, Lambert
name: Boyd, Robert W.
name: Lundeen, Jeff S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Centuries of effort to improve imaging has focused on perfecting and combining lenses to obtain better optical performance and new functionalities. The arrival of nanotechnology has brought to this effort engineered surfaces called metalenses, which promise to make imaging devices more compact. However, unaddressed by this promise is the space between the lenses, which is crucial for image formation but takes up by far the most room in imaging systems. Here, we address this issue by presenting the concept of and experimentally demonstrating an optical 'spaceplate', an optic that effectively propagates light for a distance that can be considerably longer than the plate thickness. Such an optic would shrink future imaging systems, opening the possibility for ultra-thin monolithic cameras. More broadly, a spaceplate can be applied to miniaturize important devices that implicitly manipulate the spatial profile of light, for example, solar concentrators, collimators for light sources, integrated optical components, and spectrometers.
description: 4 figures, 3 videos, includes complete SI
Accretion disc reverberation mapping of the quasar 3C 273
Creators: name: Thorne, James P.
name: Landt, Hermine
name: Huang, Jiamu
name: Santisteban, Juan V. Hernandez
name: Horne, Keith
name: Cackett, Edward M.
name: Winkler, Hartmut
name: Sanmartim, David
Publisher: name: arXiv
Year: 2025
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present accretion disc size measurements for the well-known quasar 3C 273 using reverberation mapping (RM) performed on high-cadence light-curves in seven optical filters collected with the Las Cumbres Observatory (LCO). Lag estimates obtained using Javelin and PyROA are consistent with each other and yield accretion disc sizes a factor of ~2-7 larger than `thin disc' theoretical expectations. This makes 3C 273 one of a growing number of active galactic nuclei (AGN) to display the so-called `accretion disc size' problem usually observed in low-luminosity AGN. Power-law fits of the form tau~lambda^beta to the lag spectrum, and nufnu ~ nu^beta to the spectral energy distribution (SED) of the variations, both give results consistent with the `thin disc' theoretical expectation of beta=4/3. The Starkey et al. `flat disc with a steep rim' model can fit both the lag estimates and the SED variations. Extrapolating the observed optical lags to putative dust-forming regions of the disc gives r~100-200 light-days. These radii are consistent with the size of the broad line region (BLR) as determined by near-infrared interferometric studies as well as with the best-fit location of the outer edge for the `flat disc with a steep rim' model. Therefore, the accretion disc in 3C 273 might be sufficiently extended to be dusty, allowing the BLR to emerge from it in a dusty outflow. A flux variation gradient analysis and the structure function of our LCO light-curves confirm that the optical variability in 3C 273 is dominated by the accretion disc rather than its radio jet.
description: accepted for publication in MNRAS
Paper - Chávez Calderón, Ronald Danilo - An Elementary Way of Counting Exactly the Number of Primes, pi(N)
Creators: name: Chavez, Danilo
Publisher: name: figshare
Year: 2021
Subjects: subject: 10399 Numerical and Computational Mathematics not elsewhere classified
subject: FOS: Mathematics
subject: 10104 Combinatorics and Discrete Mathematics (excl. Physical Combinatorics)
subject: 10299 Applied Mathematics not elsewhere classified
subject: 10101 Algebra and Number Theory
subject: 10199 Pure Mathematics not elsewhere classified

description: This paper shows a very elementary way of counting the number of primes under a given integer with total accuracy. Is the function pi(N)
Gaussian Prepivoting for Finite Population Causal Inference
Creators: name: Cohen, Peter L.
name: Fogarty, Colin B.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistics Theory (math.ST)
subject: Methodology (stat.ME)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: In finite population causal inference exact randomization tests can be constructed for sharp null hypotheses, i.e. hypotheses which fully impute the missing potential outcomes. Oftentimes inference is instead desired for the weak null that the sample average of the treatment effects takes on a particular value while leaving the subject-specific treatment effects unspecified. Without proper care, tests valid for sharp null hypotheses may be anti-conservative should only the weak null hold, creating the risk of misinterpretation when randomization tests are deployed in practice. We develop a general framework for unifying modes of inference for sharp and weak nulls, wherein a single procedure simultaneously delivers exact inference for sharp nulls and asymptotically valid inference for weak nulls. To do this, we employ randomization tests based upon prepivoted test statistics, wherein a test statistic is first transformed by a suitably constructed cumulative distribution function and its randomization distribution assuming the sharp null is then enumerated. For a large class of commonly employed test statistics, we show that prepivoting may be accomplished by employing the push-forward of a sample-based Gaussian measure based upon a suitably constructed covariance estimator. In essence, the approach enumerates the randomization distribution (assuming the sharp null) of a P-value for a large-sample test known to be valid under the weak null, and uses the resulting randomization distribution to perform inference. The versatility of the method is demonstrated through a host of examples, including rerandomized designs and regression-adjusted estimators in completely randomized designs.
Additional file 1 of Prominent amyloid plaque pathology and cerebral amyloid angiopathy in APP V717I (London) carrier – phenotypic variability in autosomal dominant Alzheimer’s disease
Creators: name: Lloyd, Grace M.
name: Trejo-Lopez, Jorge A.
name: Yuxing Xia
name: McFarland, Karen N.
name: Lincoln, Sarah J.
name: Ertekin-Taner, Nilüfer
name: Benoit I. Giasson
name: Yachnis, Anthony T.
name: Prokop, Stefan
Publisher: name: figshare
Year: 2020
Subjects: subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Neuroscience
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 1. Materials and Methods [12, 13, 31, 35, 62]
Microchannel turbulence management with fractal configuration induced flow dynamic: LB Modelling
Creators: name: Chai, Lit Kean
Publisher: name: Monash University
Year: 2025
Subjects: classificationCode: 400499
subject: Chemical engineering not elsewhere classified
classificationCode: 401206
subject: Fluid-structure interaction and aeroacoustics
classificationCode: 401207
subject: Fundamental and theoretical fluid dynamics
classificationCode: 401705
subject: Microelectromechanical systems (MEMS)
classificationCode: 401210
subject: Microfluidics and nanofluidics
classificationCode: 490109
subject: Theoretical and applied mechanics
classificationCode: 490199
subject: Applied mathematics not elsewhere classified
classificationCode: 401799
subject: Mechanical engineering not elsewhere classified
classificationCode: 401204
subject: Computational methods in fluid flow, heat and mass transfer (incl. computational fluid dynamics)

description: This thesis examines how tiny channels, called microchannels, can be modified to improve fluid mixing for engineering applications using numerical modelling. It focuses on the influence of surface roughness and fractal designs on the movement and mixing of fluids. By combining computer simulations and advanced analysis, the thesis also highlights how these geometrical features enhance mixing efficiency, especially in low-speed flows. The findings provide invaluable insights for designing better microfluidics systems, with potential applications in areas like drug delivery, lab-on-a-chip devices, and heat management technologies.
Review of low-mass X-ray binaries near the Galactic center
Creators: name: Lutovinov, A.
name: Grebenev, S.
name: Molkov, S.
name: Sunyaev, R.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Results of observations of several LMXBs in the Galactic center region carried out with the ART-P telescope on board \Granat observatory are briefly reviewed. More than dozen sources were revealed in this region during five series of observations which were performed with the ART-P telescope in 1990-1992. The investigation of the spectral evolution of persistent emission of two X-ray bursters GX3+1 and KS1731-260, discussion of QPO and spectral variations detected from the very bright Z-source GX5-1 and studying the pulse profile changes of the pulsar GX1+4 were carried out.
description: 5 pages, 8 figures, submitted to the Proceeding of the Galactic Center Workshop 2002, Hawaii, 5-8 November 2002
Sasakian structure associated with a second order ODE and Hamiltonian dynamical systems
Creators: name: Bayrakdar, Tuna
Publisher: name: arXiv
Year: 2020
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53C25 (Primary) 34A26, 34C40 (Secondary)

description: We define a contact metric structure on the manifold corresponding to a second order ordinary differential equation $d^2y/dx^2=f(x,y,y')$ and show that the contact metric structure is Sasakian if and only if the 1-form $\frac{1}{2}(dp-fdx)$ defines a Poisson structure. We consider a Hamiltonian dynamical system defined by this Poisson structure and show that the Hamiltonian vector field, which is a multiple of the Reeb vector field, admits a compatible bi-Hamiltonian structure for which $f$ can be regarded as a Hamiltonian function. As a particular case, we give a compatible bi-Hamiltonian structure of the Reeb vector field such that the structure equations correspond to the Maurer-Cartan equations of an invariant coframe on the Heisenberg group and the independent variable plays the role of a Hamiltonian function. We also show that the first Chern class of the normal bundle of an integral curve of a multiple of the Reeb vector field vanishes iff $f_x+ff_p = Ψ(x)$ for some $Ψ$.
The greatest common valuation of $ϕ_{n}$ and $ψ_{n}^{2}$ at points on elliptic curves
Creators: name: Voutier, Paul
name: Yabuta, Minoru
Publisher: name: arXiv
Year: 2020
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11G05, 11G07, 14G40

description: Given a minimal model of an elliptic curve, $E/K$, over a finite extension, $K$, of ${\mathbb Q}_{p}$ for any rational prime, $p$, and any point $P \in E(K)$ of infinite order, we determine precisely $\min \left( v \left( ϕ_{n}(P) \right), v \left( ψ_{n}^{2}(P) \right) \right)$, where $v$ is a normalised valuation on $K$ and $ϕ_{n}(P)$ and $ψ_{n}(P)$ are polynomials arising from multiplication by $n$ for this model of the curve.
description: accepted version (J. Number Theory), main result linked to local heights. Comments very welcome!
A multi-particle model of the 3C 48 host
Creators: name: Scharwaechter, J.
name: Eckart, A.
name: Pfalzner, S.
name: Zuther, J.
name: Krips, M.
name: Straubmeier, C.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The first successful multi-particle model for the host of the well-known quasi-stellar object (QSO) 3C 48 is reported. It shows that the morphology and the stellar velocity field of the 3C 48 host can be reproduced by the merger of two disk galaxies. The conditions of the interaction are similar to those used for interpreting the appearance of the ''Antennae'' (NGC 4038/39) but seen from a different viewing angle. The model supports the controversial hypothesis that 3C 48A is the second nucleus of a merging galaxy, and it suggests a simple solution for the problem of the missing counter tidal tail.
description: 5 pages, 5 figures, accepted for publication in A&A
Etre intégré et bio. Vulnérabilité et compensation des éleveurs de volaille bio intégrés
Subcontracting and organic. Vulnerability and compensation of organic subcontracting poultry breeders
Creators: name: NICOURT, Christian
name: CABARET, Jacques
name: DARDUIN, Ugo
name: DELANOE, Marine
name: NICOURT, Christian
name: CABARET, Jacques
name: DARDUIN, Ugo
name: DELANOE, Marine
Publisher: name: Unknown
Year: 2807
Subjects: subject: Farm Management
subject: travail
subject: métier
subject: intégration
subject: identité
subject: élevage
subject: agriculture biologique

description: L’objectif de cet article est de s’interroger sur les mobiles qui poussent des éleveurs bio à être intégrés, alors que l’agriculture biologique repose sur le modèle de l’autonomie. Pourquoi des éleveurs bio sont-ils intégrés et pourquoi acceptent-ils la disqualification sociale dont ils sont alors l’objet ? Nous soutenons l’hypothèse que l’intégration est d’abord pour eux un moyen de faire face à leur vulnérabilité économique et technique. D’un autre côté, elle permet de poursuivre ou d’initier des activités professionnelles, qui constituent pour ces éleveurs des ressources identitaires compensatoires, face au cadrage de l’intégration et à leur disqualification sociale. Nous proposons d’analyser cette situation à partir d’entretiens compréhensifs auprès d’éleveurs de volaille intégrés. L’article décrit d’abord comment l’intégration permet aux éleveurs de s’installer en bio avec des ressources financières limitées. Il examine ensuite comment l’intégration répond à leur vulnérabilité technique, en leur fournissant une assistance et des cadres de débat professionnel. Il montre enfin que cette manière d’exercer le métier d’éleveur soulève des questions identitaires singulières.
U.S. PEANUT PRODUCTION PRACTICES AND COSTS
Creators: name: McArthur, W. C.
name: Krenz, R. D.
name: Garst, G. D.
name: McArthur, W. C.
name: Krenz, R. D.
name: Garst, G. D.
Publisher: name: Unknown
Year: 1985
Subjects: subject: Crop Production/Industries
subject: Production Economics
subject: Peanuts
subject: production costs
subject: production practices
subject: production inputs

description: This report summarizes production practices, costs, and returns for the 1982 peanut crop. Production costs differed greatly by region: total cash expenditures ranged from 14.5 cents per pound for peanuts in Georgia to 24.9 cents per pound for nonirrigated peanuts in Texas. •Cash expenditures per acre ranged from $446 for peanuts in Alabama to $169 for nonirrigated peanuts in Texas. Chemicals and machinery ownership and use were major expenses for producers.
Petronia dentata subsp. buchanani Hartert
Creators: name: Lecroy, Mary
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Aves
Passeriformes
Passeridae
Petronia
Petronia dentata
Petronia dentata buchanani hartert

description: Petronia dentata buchanani Hartert
Petronia dentata buchanani Hartert, 1921: 134 (Zinder).
Now Gymnoris dentata buchanani (Hartert, 1921). See Hartert, 1928: 198; Dickinson, 2003: 718; Fry and Keith, 2004: 42–43; and Summers- Smith, 2009: 810.
HOLOTYPE: AMNH 717565, adult male, collected at Zinder, 1500 ft, 13.46N, 08.58E (Times Atlas), southern Niger (= French West Africa, as on label), on 19 February 1920, by Angus Buchanan. From the Rothschild Collection.
COMMENTS: In the original description, Hartert designated as the type of buchanani the specimen bearing Buchanan’s field number 414. The Rothschild Collection held a single specimen when Hartert named buchanani, but he noted: ‘‘There are in the British Museum two females collected at Yo and Kuka, near Lake Chad, which must belong to this new subspecies.’’
Most recent authors consider dentata monotypic, but Summers-Smith (2009: 810) recognized buchanani.
description: Published as part of Lecroy, Mary, 2014, Type Specimens Of Birds In The American Museum Of Natural History Part 12. Passeriformes: Ploceidae, Sturnidae, Buphagidae, Oriolidae, Dicruridae, Callaeidae, Grallinidae, Corcoracidae, Artamidae, Cracticidae, Ptilonorhynchidae, Cnemophilidae, Paradisaeidae, And Corvidae, pp. 1-165 in Bulletin of the American Museum of Natural History 2014 (393) on page 15, DOI: 10.1206/885.1, http://zenodo.org/record/4629954
AN ECONOMETRIC MODEL OF THE U.S. APPLE MARKET
Creators: name: Baumes, Harry S.
name: Conway, Roger K.
name: Baumes, Harry S.
name: Conway, Roger K.
Publisher: name: Unknown
Year: 1985
Subjects: Crop Production/Industries
Demand and Price Analysis

description: An econometric model of the U.S. apple sector was formulated for 1952-81. A system of demand, domestic market allocation, and margin equations were estimated using the two-stage least squares procedure. Retail prices were found to be significantly related to quantity, real per capita expenditures, substitutes complements, and stocks. The signs of the estimated coefficients in the model agreed with theoretical expectations and their magnitudes were statistically significant. A reduced-form solution to the structural model was derived to show the influence of exogenous variables on product prices, margins, and domestic use.
Radionic Non-uniform Black Strings
Creators: name: Tamaki, Takashi
name: Kanno, Sugumi
name: Soda, Jiro
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Non-uniform black strings in the two-brane system are investigated using the effective action approach. It is shown that the radion acts as a non-trivial hair of the black strings. From the brane point of view, the black string appears as the deformed dilatonic black hole which becomes dilatonic black hole in the single brane limit and reduces to the Reissner-Nordström black hole in the close limit of two-branes. The stability of solutions is demonstrated using the catastrophe theory. From the bulk point of view, the black strings are proved to be non-uniform. Nevertheless, the zeroth law of black hole thermodynamics still holds.
description: 9 pages, 6 figures
Chemistry on quantum computers with virtual quantum subspace expansion
Creators: name: Urbanek, Miroslav
name: Camps, Daan
name: Van Beeumen, Roel
name: de Jong, Wibe A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Simulating chemical systems on quantum computers has been limited to a few electrons in a minimal basis. We demonstrate experimentally that the virtual quantum subspace expansion [Phys. Rev. X 10, 011004 (2020)] can achieve full basis accuracy for hydrogen and lithium dimers, comparable to simulations requiring twenty or more qubits. We developed an approach to minimize the impact of experimental noise on the stability of the generalized eigenvalue problem, a crucial component of the quantum algorithm. In addition, we were able to obtain an accurate potential energy curve for the nitrogen dimer in a quantum simulation on a classical computer.
Acylindrical hyperbolicity of automorphism groups of infinitely-ended groups
Creators: name: Genevois, Anthony
name: Horbez, Camille
Publisher: name: arXiv
Year: 2020
Subjects: subject: Group Theory (math.GR)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 20F65, 20E36, 20E06, 20F67, 20E08

description: We prove that the automorphism group of every infinitely-ended finitely generated group is acylindrically hyperbolic. In particular $\mathrm{Aut}(\mathbb{F}_n)$ is acylindrically hyperbolic for every $n\ge 2$. More generally, if $G$ is a group which is not virtually cyclic, and hyperbolic relative to a finite collection $\mathcal{P}$ of finitely generated proper subgroups, then $\mathrm{Aut}(G,\mathcal{P})$ is acylindrically hyperbolic. As a consequence, a free-by-cyclic group $\mathbb{F}_n\rtimes_φ\mathbb{Z}$ is acylindrically hyperbolic if and only if $φ$ has infinite order in $\mathrm{Out}(\mathbb{F}_n)$.
description: 31 pages. To appear in Journal of Topology
Additional file 6 of A multiplex guide RNA expression system and its efficacy for plant genome engineering
Creators: name: Youngbin Oh
name: Lee, Bora
name: Hyeonjin Kim
name: Kim, Sang-Gyu
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 6. Mutation patterns induced by pGG-4 in callus. Large deletions and small indels observed in calli -1, -2, -3, -4, and –5. Wild type (WT) sequences of NaNEC1c and NaEAH1 are shown with guide sequences (underlined) and protospacer adjacent motif (PAM) in red. The DNA sequences of target locus are ranked with the mutation frequency. Indels are presented in blue (insertion) and as dashes (deletion).
Utilizing the Wavelet Transform's Structure in Compressed Sensing
Creators: name: Dwork, Nicholas
name: O'Connor, Daniel
name: Baron, Corey A.
name: Johnson, Ethan M. I.
name: Kerr, Adam B.
name: Pauly, John M.
name: Larson, Peder E. Z.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Image and Video Processing (eess.IV)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Compressed sensing has empowered quality image reconstruction with fewer data samples than previously though possible. These techniques rely on a sparsifying linear transformation. The Daubechies wavelet transform is a common sparsifying transformation used for this purpose. In this work, we take advantage of the structure of this wavelet transform and identify an affine transformation that increases the sparsity of the result. After inclusion of this affine transformation, we modify the resulting optimization problem to comply with the form of the Basis Pursuit Denoising problem. Finally, we show theoretically that this yields a lower bound on the error of the reconstruction and present results where solving this modified problem yields images of higher quality for the same sampling patterns.
SDSS J115517.35+634622.0: A Newly Discovered Gravitationally Lensed Quasar
Creators: name: Pindor, Bart
name: Eisenstein, Daniel J.
name: Inada, Naohisa
name: Gregg, Michael D.
name: Becker, Robert H.
name: Brinkmann, Jon
name: Burles, Scott
name: Frieman, Joshua A.
name: Johnston, David E.
name: Richards, Gordon T.
name: Schneider, Donald P.
name: Scraton, Ryan
name: Sekiguchi, Maki
name: Turner, Edwin L.
name: York, Donald G.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report the discovery of SDSSJ115517.35+634622.0, a previously unknown gravitationally lensed quasar. The lens system exhibits two images of a $z = 2.89$ quasar, with an image separation of $1{\farcs}832 \pm 0.007$ . Near-IR imaging of the system reveals the presence of the lensing galaxy between the two quasar images. Based on absorption features seen in the Sloan Digital Sky Survey (SDSS) spectrum, we determine a lens galaxy redshift of $z = 0.1756$. The lens is rather unusual in that one of the quasar images is only $0{\farcs}22\pm0{\farcs}07$ ($\sim 0.1 R_{\rm eff}$) from the center of the lens galaxy and photometric modeling indicates that this image is significantly brighter than predicted by a SIS model. This system was discovered in the course of an ongoing search for strongly lensed quasars in the dataset from the SDSS.
description: 18 pages, 6 figures. Accepted for publication in AJ
Do you want a drink with that? Exploring the impact of the decoy effect on peoples’ food choices
Creators: name: Ngo, Angie
name: Dutta, Bhoomika
name: Ling, Harry (Zhi-Heng)
Publisher: name: The University of British Columbia
Year: 2020

description: The decoy effect is a cognitive bias, commonly used as a marketing strategy, to influence a buyer’s decision. Its purpose is to make the highest priced option appear more attractive by having an asymmetrical dominance over the other two choices. Here we examine how the decoy effect alters people’s likelihood of incorporating plant based foods into their diet with and without its presence. By randomly assigning participants into two conditions, we then measured their intended eating behaviour through a survey. We found that approximately three-quarters of our participants chose the meat-based meal when they were presented with the choice of a plant-based or meat-based meal. With the decoy present, we found a decrease in the amount of participants who selected the meat-option. However, the decoy itself was picked for both breakfast and dinner. Through a chi-square significance test, we found that the decoy effect was only statistically significant for breakfast and lunch at p <.05, illustrating a relationship between the two options. Disclaimer: “UBC SEEDS provides students with the opportunity to share the findings of their studies, as well as their opinions, conclusions and recommendations with the UBC community. The reader should bear in mind that this is a student project/report and is not an official document of UBC. Furthermore readers should bear in mind that these reports may not reflect the current status of activities at UBC. We urge you to contact the research persons mentioned in a report or the SEEDS Coordinator about the current status of the subject matter of a project/report.”
Planar polycrystals with extremal bulk and shear moduli
Creators: name: Milton, Graeme W.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: Here we consider the possible bulk and shear moduli of planar polycrystals built from a single crystal in various orientations. Previous work gave a complete characterization for crystals with orthotropic symmetry. Specifically, bounds were derived separately on the effective bulk and shear moduli, thus confining the effective moduli to lie within a rectangle in the (bulk, shear) plane. It was established that every point in this rectangle could be realized by an appropriate hierarchical laminate microgeometry, with the crystal taking different orientations in the layers, and the layers themselves being in different orientations. The bounds are easily extended to crystals with no special symmetry, but the path to constructing microgeometries that achieve every point in the rectangle defined by the bounds is considerably more difficult. We show that the two corners of the box having minimum bulk modulus are always attained by hierarchical laminates. For the other two corners we present algorithms for generating hierarchical laminates that attain them. Numerical evidence strongly suggests that the corner having maximum bulk and maximum shear modulus is always attained. For the remaining corner, with maximum bulk modulus and minimum shear modulus, it is not yet clear whether the algorithm always succeeds, and hence whether all points in the rectangle are always attained. The microstructures we use are hierarchical laminate geometries that at their core have a self-similar microstructure, in the sense that the microstructure on one length scale is a rotation and rescaling of that on a smaller length scale.
description: 34 pages, 6 figures
The structure and labelled enumeration of K_{3,3}-subdivision-free projective-planar graphs
Creators: name: Gagarin, Andrei
name: Labelle, Gilbert
name: Leroux, Pierre
Publisher: name: arXiv
Year: 2004
Subjects: subject: Combinatorics (math.CO)
subject: Discrete Mathematics (cs.DM)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 05C30, 05C10 (Primary); 68R10 (Secondary)

description: We consider the class F of 2-connected non-planar K_{3,3}-subdivision-free graphs that are embeddable in the projective plane. We show that these graphs admit a unique decomposition as a graph K_5 (the core) where the edges are replaced by two-pole networks constructed from 2-connected planar graphs. A method to enumerate these graphs in the labelled case is described. Moreover, we enumerate the homeomorphically irreducible graphs in F and homeomorphically irreducible 2-connected planar graphs. Particular use is made of two-pole directed series-parallel networks. We also show that the number m of edges of graphs in F with n vertices satisfies the bound m <=3n-6, for n >= 6.
description: Revised version. 20 pages. To appear in Pure Mathematics and Applications - Algebra and Theoretical Computer Science
Distance Metric Learning for Graph Structured Data
Creators: name: Yoshida, Tomoki
name: Takeuchi, Ichiro
name: Karasuyama, Masayuki
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Graphs are versatile tools for representing structured data. As a result, a variety of machine learning methods have been studied for graph data analysis. Although many such learning methods depend on the measurement of differences between input graphs, defining an appropriate distance metric for graphs remains a controversial issue. Hence, we propose a supervised distance metric learning method for the graph classification problem. Our method, named interpretable graph metric learning (IGML), learns discriminative metrics in a subgraph-based feature space, which has a strong graph representation capability. By introducing a sparsity-inducing penalty on the weight of each subgraph, IGML can identify a small number of important subgraphs that can provide insight into the given classification task. Because our formulation has a large number of optimization variables, an efficient algorithm that uses pruning techniques based on safe screening and working set selection methods is also proposed. An important property of IGML is that solution optimality is guaranteed because the problem is formulated as a convex problem and our pruning strategies only discard unnecessary subgraphs. Furthermore, we show that IGML is also applicable to other structured data such as itemset and sequence data, and that it can incorporate vertex-label similarity by using a transportation-based subgraph feature. We empirically evaluate the computational efficiency and classification performance of IGML on several benchmark datasets and provide some illustrative examples of how IGML identifies important subgraphs from a given graph dataset.
description: 38 pages, 11 figures. This is a pre-print of an article published in Machine Learning Journal. The final authenticated version is available online at: https://doi.org/10.1007/s10994-021-06009-3
INDEX FOR SELECTING RC&D PROJECTS AND ALLOCATING PROGRAM FUNDS
Creators: name: Gadsby, Dwight M.
name: Gadsby, Dwight M.
Publisher: name: Unknown
Year: 1985
Subjects: subject: Financial Economics
subject: Research and Development/Tech Change/Emerging Technologies
subject: RC&D index
subject: factor scores
subject: demonstrated economic need
subject: impact
subject: choice decisions
subject: active project areas
subject: applicant area scoring system
subject: environmental issues
subject: social infrastructure

description: This report discusses an index designed to assist in selecting projects and allocating funds under USDA's Resource Conservation and Development (RC&D) program. The index combines 18 separate factors into a single score for each project area. The factors reflect primarily economic need (population density, unemployment, low incomes, declining industry), but also include land use and environmental problems. The indexing procedure and factor scoring are presented. When the procedures were applied to 192 active RC&D project areas and 47 applicant areas, the distribution of index scores indicated that a number of applicant areas had relatively high economic need for a project, more so than a number of existing projects.
Additional file 7 of A multiplex guide RNA expression system and its efficacy for plant genome engineering
Creators: name: Youngbin Oh
name: Lee, Bora
name: Hyeonjin Kim
name: Kim, Sang-Gyu
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 7. Full sequences of pGRNA vectors.
MANAJEMEN OJS JURNAL LABORAN UNIVERSITAS BENGKULU
Creators: name: Lubis, Azhar Aziz
Publisher: name: Zenodo
Year: 2021
Subjects: manajemen publikasi
OJS 2
jurnal laboran
Universitas Bengkulu

description: Materi salindia ini disajikan pada kegiatan Workshop Jurnal Laboran UNIB yang diselenggarakan pada tanggal 6 April 2021 secara daring.
Pyrgita rupestris C. L. Brehm
Creators: name: Lecroy, Mary
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Aves
Passeriformes
Passeridae
Pyrgita
Pyrgita rupestris

description: Pyrgita rupestris C.L. Brehm
Pyrgita rupestris C.L. Brehm, 1831: 264 (Er lebt nur in manchen Jahren in Saalthale und brütet selten daselbst.)
Now Petronia petronia petronia (Linnaeus, 1766). See Hartert, 1918a: 14; Vaurie, 1959: 584–585; Moreau and Greenway, 1962: 24; and Dickinson, 2003: 718.
LECTOTYPE: AMNH 456560, adult male, collected at Lobeda (= Lobedaburg, as on label), 50.53N, 11.36E (Times Atlas), near Jena, Germany, on 15 June 1816. From the Brehm Collection via the Rothschild Collection.
COMMENTS: This specimen is one of four Brehm specimens labeled rupestris communis that came to AMNH with the Rothschild Collection. It was listed as the type by Hartert (1918a: 14), who thereby designated it the lectotype. As he noted, Brehm had written on his label that the specimen was ‘‘taken from nest on the Lobedaburg near Jena, 15.vi.1816, died in cage, 10.x.1816.’’ Tied to the lectotype is AMNH 456561, female juvenile, taken with the male on 15 June 1816, but apparently not kept in captivity. It is a paralectotype of rupestris. Because it is tied to the adult male, it is kept in the type collection with it. The other two specimens labeled rupestris communis were collected prior to the 1831 publication of rupestris but are not specifically mentioned in the description: AMNH 456562, male juvenile, and AMNH 456563, female juvenile, collected at Lobeda near Jena on 20 June 1828. They are also tied together.
description: Published as part of Lecroy, Mary, 2014, Type Specimens Of Birds In The American Museum Of Natural History Part 12. Passeriformes: Ploceidae, Sturnidae, Buphagidae, Oriolidae, Dicruridae, Callaeidae, Grallinidae, Corcoracidae, Artamidae, Cracticidae, Ptilonorhynchidae, Cnemophilidae, Paradisaeidae, And Corvidae, pp. 1-165 in Bulletin of the American Museum of Natural History 2014 (393) on page 13, DOI: 10.1206/885.1, http://zenodo.org/record/4629954
Oxygen trends in the Galactic thin and thick disks
Creators: name: Bensby, T.
name: Feltzing, S.
name: Lundstrom, I.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present oxygen abundances for 72 F and G dwarf stars in the solar neighbourhood. Using the kinematics of the stars we divide them into two sub-samples with space velocities that are typical for the thick and thin disks, respectively. The metallicities of the stars range from [Fe/H] = -0.9 to +0.4 and we use the derived oxygen abundances of the stars to: (1) perform a differential study of the oxygen trends in the thin and the thick disk; (2) to follow the trend of oxygen in the thin disk to the highest metallicities. We analyze the forbidden oxygen lines at 6300 Å and 6363 Å as well as the (NLTE afflicted) triplet lines around 7774 Å. For the forbidden line at 6300 A we have spectra of very high S/N (>400) and resolution (R=215 000). This has enabled a very accurate modeling of the oxygen line and the blending Ni lines. The high internal accuracy in our determination of the oxygen abundances from this line is reflected in the very tight trends we find for oxygen relative to iron........
description: Accepted for publication in A&A, 16 pages
Charge ordering and magneto-polarons in Na$_{0.82}$CoO$_2$
Creators: name: Bernhard, C.
name: Boris, A. V.
name: Kovaleva, N. N.
name: Khaliullin, G.
name: Pimenov, A.
name: Yu, L.
name: Chen, D. P.
name: Lin, C. T.
name: Keimer, B.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Using spectral ellipsometry, we have measured the dielectric function of a Na$_{0.82(2)}$CoO$_2$ crystal that exhibits bulk antiferromagnetism with T$_{N}$=19.8 K. We identify two prominent transitions as a function of temperature. The first one at 280 K involves marked changes of the electronic and the lattice response that are indicative of charge ordering in the CoO$_{2}$ layers. The second transition coincides with T$_{N}$=19.8 K and reveals a sizeable spin-charge coupling. The data are discussed in terms of charge ordering and formation of magneto-polarons due to a charge-induced spin-state transition of adjacent Co$^{3+}$ ions.
One-dimensional wave equation with set-valued boundary damping: well-posedness, asymptotic stability, and decay rates
Creators: name: Chitour, Yacine
name: Marx, Swann
name: Mazanti, Guilherme
Publisher: name: arXiv
Year: 2020
Subjects: subject: Analysis of PDEs (math.AP)
subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 35L05, 35B40, 35R70, 39A60, 93D20

description: This paper is concerned with the analysis of a one dimensional wave equation $z_{tt}-z_{xx}=0$ on $[0,1]$ with a Dirichlet condition at $x=0$ and a damping acting at $x=1$ which takes the form $(z_t(t,1),-z_x(t,1))\inΣ$ for every $t\geq 0$, where $Σ$ is a given subset of $\mathbb R^2$. The study is performed within an $L^p$ functional framework, $p\in [1, +\infty]$. We aim at determining conditions on $Σ$ ensuring existence and uniqueness of solutions of that wave equation as well as strong stability and uniform global asymptotic stability of its solutions. In the latter case, we also study the decay rates of the solutions and their optimality. We first establish a one-to-one correspondence between the solutions of that wave equation and the iterated sequences of a discrete-time dynamical system in terms of which we investigate the above mentioned issues. This enables us to provide a simple necessary and sufficient condition on $Σ$ ensuring existence and uniqueness of solutions of the wave equation as well as an efficient strategy for determining optimal decay rates when $Σ$ verifies a generalized sector condition. As an application, we solve two conjectures stated in the literature, the first one seeking a specific optimal decay rate and the second one associated with a saturation type of damping. In case the boundary damping is subject to perturbations, we derive sharp results regarding asymptotic perturbation rejection and input-to-state issues.
THE WORLD GRAIN-OILSEEDS-LIVESTOCK (GOL) MODEL, A SIMPLIFIED VERSION
Creators: name: Liu, Karen
name: Roningen, Vernon O.
name: Liu, Karen
name: Roningen, Vernon O.
Publisher: name: Unknown
Year: 1985
Subjects: subject: Crop Production/Industries
subject: Demand and Price Analysis
subject: Livestock Production/Industries
subject: grain
subject: oilseeds
subject: livestock
subject: GOL model
subject: supply
subject: demand
subject: trade
subject: world price
subject: trade model

description: This report presents a simplified version of the world grain-oilseeds-livestock (GOL) agricultural trade model. It describes the general characteristics of GOL, its product coverage, and its regional configuration. Specifications are given for a simple standard country model and for the world market clearing model. The report also describes the linkage mechanism which combines country models, regional models, and the world market clearing model to form a world system. It discusses the requirements for model simulations and the linkage of more detailed versions of country models to the global system.