cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Never fearer, the future is clearer as three adaptive secondary mirrors draw nearer
Creators: name: Bowens-Rubin, Rachel
Publisher: name: Zenodo
Year: 2021
Subjects: adaptive optics
adaptive secondary mirrors
UH88-inch telescope
Automated Planet Finder Telescope

description: Adaptive optics (AO) instrumentation is essential when conducting seeing-limited observations from ground-based facilities. Replacing a telescope's static secondary mirror with an adaptive secondary mirror provides a way to streamline the AO system and reduce the thermal background in mid-infrared observations. In this poster, I discuss an emerging actuator technology that could make adaptive secondary mirror technology more accessible for the next generation of telescopes. I provide an overview of three next-generation adaptive secondary mirrors in development for the UH88 telescope, Automated Planet Finder, and the W.M. Keck Observatory.
Parameter symmetry in perturbed GUE corners process and reflected drifted Brownian motions
Creators: name: Petrov, Leonid
name: Tikhonov, Mikhail
Publisher: name: arXiv
Year: 2019
Subjects: subject: Probability (math.PR)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: The perturbed GUE corners ensemble is the joint distribution of eigenvalues of all principal submatrices of a matrix $G+\mathrm{diag}(\mathbf{a})$, where $G$ is the random matrix from the Gaussian Unitary Ensemble (GUE), and $\mathrm{diag}(\mathbf{a})$ is a fixed diagonal matrix. We introduce Markov transitions based on exponential jumps of eigenvalues, and show that their successive application is equivalent in distribution to a deterministic shift of the matrix. This result also leads to a new distributional symmetry for a family of reflected Brownian motions with drifts coming from an arithmetic progression. The construction we present may be viewed as a random matrix analogue of the recent results of the first author and Axel Saenz (arXiv:1907.09155 [math.PR]).
description: 14 pages, 1 figure. v3: minor fixes in proof of Thm. 4.4; typos fixed
Universal Behavior of the Resistance Noise across the Metal-Insulator Transition in Silicon Inversion Layers
Creators: name: Jaroszynski, J.
name: Popovic, Dragana
name: Klapwijk, T. M.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Studies of low-frequency resistance noise show that the glassy freezing of the two-dimensional (2D) electron system in the vicinity of the metal-insulator transition occurs in all Si inversion layers. The size of the metallic glass phase, which separates the 2D metal and the (glassy) insulator, depends strongly on disorder, becoming extremely small in high-mobility samples. The behavior of the second spectrum, an important fourth-order noise statistic, indicates the presence of long-range correlations between fluctuators in the glassy phase, consistent with the hierarchical picture of glassy dynamics.
description: revtex4; 4+ pages, 5 figures
Stray light analysis of the Xinglong 2.16m telescope
Creators: name: Li, Taoran
Publisher: name: arXiv
Year: 2019
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: An effort towards understanding of the stray light problems for the Xinglong 2.16-m telescope was presented to estimate the stray light performance of the telescope itself and provide a method for improving the stray light suppression. The stray light analysis for 2.16-m telescope model, which consists the onion shaped dome, telescope structure, equatorial mount and telescope optics, has been performed with two cases (1) point to 60° and (2) point to zenith, in both azimuth and elevation direction. The Point Source Normalized Irradiance Transmittance (PSNIT), which is generally used for assessing stray light and uncorrelated to entrance aperture, was calculated with a series of off-axis angles. It shows that the PSNIT values are less than 10-7 when off-axis angles are larger than 20°. The dominant contributors of stray light (primary and secondary mirror, telescope structure and dome) were identified to give advice for performance improvement. The analyses indicate that significant benefit can be realized with adding only 5 vanes inside the bottom portion of the secondary baffle. In the case of point to zenith, the PSNIT values will decrease about 40% at average.
Triple Roman Domination in Graphs
Creators: name: Ahangar, Hossein Abdollahzadeh
name: Alvarez, M. Pilar
name: Chellali, Mustapha
name: Sheikholeslami, Seyed Mahmoud
name: Valenzuela-Tripodoro, Juan Carlos
Publisher: name: arXiv
Year: 2024
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: The Roman domination in graphs is well-studied in graph theory. The topic is related to a defensive strategy problem in which the Roman legions are settled in some secure cities of the Roman Empire. The deployment of the legions around the Empire is designed in such a way that a sudden attack to any undefended city could be quelled by a legion from a strong neighbour. There is an additional condition: no legion can move if doing so leaves its base city defenceless. In this manuscript we start the study of a variant of Roman domination in graphs: the triple Roman domination. We consider that any city of the Roman Empire must be able to be defended by at least three legions. These legions should be either in the attacked city or in one of its neighbours. We determine various bounds on the triple Roman domination number for general graphs, and we give exact values for some graph families. Moreover, complexity results are also obtained.
Empirical Analysis of Session-Based Recommendation Algorithms
Creators: name: Ludewig, Malte
name: Mauro, Noemi
name: Latifi, Sara
name: Jannach, Dietmar
Publisher: name: arXiv
Year: 2019
Subjects: subject: Information Retrieval (cs.IR)
subject: Machine Learning (cs.LG)
subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences

description: Recommender systems are tools that support online users by pointing them to potential items of interest in situations of information overload. In recent years, the class of session-based recommendation algorithms received more attention in the research literature. These algorithms base their recommendations solely on the observed interactions with the user in an ongoing session and do not require the existence of long-term preference profiles. Most recently, a number of deep learning based ("neural") approaches to session-based recommendations were proposed. However, previous research indicates that today's complex neural recommendation methods are not always better than comparably simple algorithms in terms of prediction accuracy. With this work, our goal is to shed light on the state-of-the-art in the area of session-based recommendation and on the progress that is made with neural approaches. For this purpose, we compare twelve algorithmic approaches, among them six recent neural methods, under identical conditions on various datasets. We find that the progress in terms of prediction accuracy that is achieved with neural methods is still limited. In most cases, our experiments show that simple heuristic methods based on nearest-neighbors schemes are preferable over conceptually and computationally more complex methods. Observations from a user study furthermore indicate that recommendations based on heuristic methods were also well accepted by the study participants. To support future progress and reproducibility in this area, we publicly share the session-rec evaluation framework that was used in our research.
Modelling the role of flux density and coating on nanoparticle internalization by tumor cells under centrifugation
Creators: name: Calvo, Gabriel F.
name: Cortés-Llanos, Belén
name: Belmonte-Beitia, Juan
name: Salas, Gorka
name: Ayuso-Sacido, Ángel
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantitative Methods (q-bio.QM)
subject: FOS: Biological sciences

description: Nanoparticle (NP)-based applications are becoming increasingly important in the biomedical field. However, understanding the interactions of NPs with biofluids and cells is a major issue in order to develop novel approaches aimed at boosting their internalization and, therefore, their translation into the clinic. To this end, we put forward a transport mathematical model to describe the spatio-temporal dynamics of iron oxide NPs and their interaction with cells under moderate centrifugation. Our numerical simulations allowed us to quantify the relevance of the flux density as one of the unavoidable key features driving NPs interaction with the media as well as for cell internalization processes. These findings will help to increase the efficiency of cell labelling for biomedical applications.
description: 39 pages, 9 figures. Manuscript published in Applied Mathematical Modelling 78, 98-116 (2020)
MOESM8 of Use of bio-loggers to characterize red fox behavior with implications for studies of magnetic alignment responses in free-roaming animals
Creators: name: Painter, Michael
name: Blanco, Justin
name: E. Malkemper
name: Anderson, Chris
name: Sweeney, Daniel
name: Hewgley, Charles
name: ÄErvenĂ˝, Jaroslav
name: Hart, Vlastimil
name: VĂĄclav Topinka
name: Belotti, Elisa
name: Burda, Hynek
name: Phillips, John
Publisher: name: figshare
Year: 2019
Subjects: subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences

description: Additional file 1: Table S1. Bio-logging device orientations.
Symplectic Parshin-Arakelov inequality
Creators: name: Li, Tian-Jun
Publisher: name: arXiv
Year: 2001
Subjects: subject: Symplectic Geometry (math.SG)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: Lefschetz fibration is the symplectic analogue of stable holomorphic fibration in complex geometry. A 4-dimensional stable holomorphic fibration satisfies the famous Parshin-Arakelov inequality. In this note we present an analogous inequality for a 4-dimensional Lefschetz fibration.
Primordial non-Gaussianity without tails -- how to measure fNL with the bulk of the density PDF
Creators: name: Friedrich, Oliver
name: Uhlemann, Cora
name: Villaescusa-Navarro, Francisco
name: Baldauf, Tobias
name: Manera, Marc
name: Nishimichi, Takahiro
Publisher: name: arXiv
Year: 2019
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We investigate the possibility to detect primordial non-Gaussianity by analysing the bulk of the probability distribution function (PDF) of late-time cosmic density fluctuations. For this purpose we devise a new method to predict the impact of general non-Gaussian initial conditions on the late-time density PDF. At redshift $z=1$ and for a smoothing scale of 30Mpc/$h$ our predictions agree with the high-resolution Quijote N-body simulations to $\sim 0.2\%$ precision. This is within cosmic variance of a $\sim 100(\mathrm{Gpc}/h)^3$ survey volume. When restricting to this 30Mpc/$h$ smoothing scale and to mildly non-linear densities ($δ[30\mathrm{Mpc}/h] \in [-0.3, 0.4]$) and also marginalizing over potential ignorance of the amplitude of the non-linear power spectrum an analysis of the PDF for such a survey volume can still measure the amplitude of different primordial bispectrum shapes to an accuracy of \smash{$Δf_{\mathrm{NL}}^{\mathrm{loc}}=\pm 7.4\ ,\ Δf_{\mathrm{NL}}^{\mathrm{equi}}=\pm 22.0\ ,\ Δf_{\mathrm{NL}}^{\mathrm{ortho}}=\pm 46.0$} . When pushing to smaller scales and assuming a joint analysis of the PDF with smoothing radii of 30Mpc/$h$ and 15Mpc/$h$ ($δ[15\mathrm{Mpc}/h] \in [-0.4, 0.5]$) this improves to \smash{$Δf_{\mathrm{NL}}^{\mathrm{loc}}=\pm 3.3\ ,\ Δf_{\mathrm{NL}}^{\mathrm{equi}}=\pm 11.0\ ,\ Δf_{\mathrm{NL}}^{\mathrm{ortho}}=\pm 17.0\ $} - even when marginalizing over the non-linear variances at both scales as two free parameters. Especially, such an analysis could simultaneously measure $f_{\mathrm{NL}}$ and the amplitude and slope of the non-linear power spectrum. However, at 15Mpc/$h$ our predictions are only accurate to $\lesssim 0.8\%$ for the considered density range. We discuss how this has to be improved in order to push to these small scales and make full use of upcoming surveys with a PDF-based analysis.
description: changes to agree with journal version; 22 pages, 12 figures; public code available at https://github.com/OliverFHD/CosMomentum
Surface Layers in General Relativity and Their Relation to Surface Tensions
Creators: name: Schmidt, H. -J.
Publisher: name: arXiv
Year: 2001
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: For a thin shell, the intrinsic 3-pressure will be shown to be analogous to -A, where A is the classical surface tension: First, interior and exterior Schwarzschild solutions will be matched together such that the surface layer generated at the common boundary has no gravitational mass; then its intrinsic 3-pressure represents a surface tension fulfilling Kelvin's relation between mean curvature and pressure difference in the Newtonian limit. Second, after a suitable definition of mean curvature, the general relativistic analogue to Kelvin's relation will be proven to be contained in the equation of motion of the surface layer.
description: 12 pages, LaTeX, no figure
Additional file 2: of Erratum to: When parents face the death of their child: a nationwide cross-sectional survey of parental perspectives on their childâ s end-of life care
Creators: name: Zimmermann, Karin
name: Bergstraesser, Eva
name: Engberg, Sandra
name: Anne-Sylvie Ramelet
name: Marfurt-Russenberger, Katrin
name: Weid, Nicolas Von Der
name: Grandjean, Chantal
name: Fahrni-Nater, Patricia
name: Cignacco, Eva
Publisher: name: figshare
Year: 2019
Subjects: subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Developmental Biology
subject: Science Policy

description: Complete list of items of the PaPEQu with corresponding response options. (PDF 200 kb)
On the outer independent total double Roman dominating functions
Creators: name: Ahangar, H. Abdolahzadeh
name: Chellali, M.
name: Sheikholeslami, S. M.
name: Valenzuela-Tripodoro, J. C.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: Let $\{0,1,\dots, t\}$ be abbreviated by $[t].$ A double Roman dominating function (DRDF) on a graph $Γ=(V,E)$ is a map $l:V\rightarrow [3]$ satisfying \textrm{(i)} if $l(r)=0$ then there must be at least two neighbors labeled 2 under $l$ or a neighbor $r'$ with $l(r')=3$; and \textrm{(ii)} if $l(r)=1$ then $r$ must be adjacent to a vertex $r'$ such that $l(r')\geq2$. A DRDF is an outer-independent total double Roman dominating function (OITDRDF) on $Γ$ if the set of vertices labeled $0$ induces an edgeless subgraph and the subgraph induced by the vertices with a non-zero label has no isolated vertices. The weight of an OITDRDF is the sum of its map values over all vertices, and the outer independent total Roman dominating number $γ_{tdR}^{oi}(Γ)$ is the minimum weight of an OITDRDF on $Γ$. First, we prove that the problem of determining $γ_{tdR}^{oi}(Γ)$ is NP-complete for bipartite and chordal graphs, after that, we prove that it is solvable in linear time when we are restricting to bounded clique-width graphs. Moreover, we present some tight bounds on $γ_{tdR}^{oi}(Γ)$ as well as the exact values for several graph families.
Spin-dynamics simulations of the triangular antiferromagnetic XY model
Creators: name: Nho, Kwangsik
name: Landau, D. P.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Using Monte Carlo and spin-dynamics methods, we have investigated the dynamic behavior of the classical, antiferromagnetic XY model on a triangular lattice with linear sizes $L \leq 300$. The temporal evolutions of spin configurations were obtained by solving numerically the coupled equations of motion for each spin using fourth-order Suzuki-Trotter decompositions of exponential operators. From space- and time-displaced spin-spin correlation functions and their space-time Fourier transforms we obtained the dynamic structure factor $S({\bf q},w)$ for momentum ${\bf q}$ and frequency $ω$. Below $T_{KT}$(Kosterlitz-Thouless transition), both the in-plane ($S^{xx}$) and the out-of-plane ($S^{zz}$) components of $S({\bf q},ω)$ exhibit very strong and sharp spin-wave peaks. Well above $T_{KT}$, $S^{xx}$ and $S^{zz}$ apparently display a central peak, and spin-wave signatures are still seen in $S^{zz}$. In addition, we also observed an almost dispersionless domain-wall peak at high $ω$ below $T_{c}$(Ising transition), where long-range order appears in the staggered chirality. Above $T_{c}$, the domain-wall peak disappears for all $q$. The lineshape of these peaks is captured reasonably well by a Lorentzian form. Using a dynamic finite-size scaling theory, we determined the dynamic critical exponent $z$ = 1.002(3). We found that our results demonstrate the consistency of the dynamic finite-size scaling theory for the characteristic frequeny $ω_{m}$ and the dynamic structure factor $S({\bf q},ω)$ itself.
description: 8 pages, RevTex, 10 figures, submitted to PRB
Bayesian Optimization with Adaptive Kernels for Robot Control
Creators: name: Martinez-Cantin, Ruben
Publisher: name: arXiv
Year: 2024
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Active policy search combines the trial-and-error methodology from policy search with Bayesian optimization to actively find the optimal policy. First, policy search is a type of reinforcement learning which has become very popular for robot control, for its ability to deal with complex continuous state and action spaces. Second, Bayesian optimization is a sample efficient global optimization method that uses a surrogate model, like a Gaussian process, and optimal decision making to carefully select each sample during the optimization process. Sample efficiency is of paramount importance when each trial involves the real robot, expensive Monte Carlo runs, or a complex simulator. Black-box Bayesian optimization generally assumes a cost function from a stationary process, because nonstationary modeling is usually based on prior knowledge. However, many control problems are inherently nonstationary due to their failure conditions, terminal states and other abrupt effects. In this paper, we present a kernel function specially designed for Bayesian optimization, that allows nonstationary modeling without prior knowledge, using an adaptive local region. The new kernel results in an improved local search (exploitation), without penalizing the global search (exploration), as shown experimentally in well-known optimization benchmarks and robot control scenarios. We finally show its potential for the design of the wing shape of a UAV.
description: 2017 IEEE International Conference on Robotics and Automation (ICRA). arXiv admin note: substantial text overlap with arXiv:1610.00366
Not all who wander are lost: evaluation of the Hull York medical school longitudinal integrated clerkship
Creators: name: Brown, Megan E. L.
name: Crampton, Paul E. S.
name: Anderson, Kevin
name: Finn, Gabrielle M.
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy
subject: Plant Biology

description: Longitudinal integrated clerkships (LICs) are increasingly available within the United Kingdom, but gaps in knowledge remain regarding their efficacy and the influence of local context. In 2019–20, the Hull York Medical School ran a pilot LIC for 6 fourth-year medical students. This work describes the longitudinal qualitative programme evaluation. LIC students participated in two focus groups, one after four months, and another at the end of the programme. In total, 16 faculty were also interviewed regarding their experiences in developing, implementing and running the LIC. Students’ GP supervisors were difficult to engage in detailed evaluation due to the COVID-19 pandemic, and so were briefly surveyed at the end of the LIC. All data were pooled and analysed together using reflexive thematic analysis. Two major themes were identified: ‘Trajectory of the LIC’, describing the learning curve students and faculty encounter, and ‘Institutional decision making’, describing the need for clarity regarding the programme’s purpose. The programme was largely positively received, but areas for improvement locally, and transferrable recommendations, were identified. Aligning assessment to programme aims is an important area for future development, alongside balancing structured with unstructured time, and supporting students as they navigate a J-shaped learning curve.
A product-limit estimator of the conditional survival function when cure status is partially known
Creators: name: Safari, Wende C.
name: López-de-Ullibarri, Ignacio
name: Jácome, M. Amalia
Publisher: name: arXiv
Year: 2024
Subjects: subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences

description: We introduce a nonparametric estimator of the conditional survival function in the mixture cure model for right censored data when cure status is partially known. The estimator is developed for the setting of a single continuous covariate but it can be extended to multiple covariates. It extends the estimator of Beran (1981), which ignores cure status information. We obtain an almost sure representation, from which the strong consistency and asymptotic normality of the estimator are derived. Asymptotic expressions of the bias and variance demonstrate a reduction in the variance with respect to Beran's estimator. A simulation study shows that, if the bandwidth parameter is suitably chosen, our estimator performs better than others for an ample range of covariate values. A bootstrap bandwidth selector is proposed. Finally, the proposed estimator is applied to a real dataset studying survival of sarcoma patients.
Spacetime Fluctuations in AdS/CFT
Creators: name: Verlinde, Erik
name: Zurek, Kathryn M.
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We compute fluctuations in the modular energy of the vacuum associated with a Rindler-wedge in AdS spacetime in the context of AdS/CFT. We discuss the possible effect of these energy fluctuations on the spacetime geometry, and on the traversal time of a light beam propagating from the boundary to the bulk and back.
description: 25 pages, 1 figure. v2: Updated to reflect published version
Are Coronae of Magnetically Active Stars Heated by Flares? II. EUV and X-Ray Flare Statistics and the Differential Emission Measure Distribution
Creators: name: Guedel, Manuel
name: Audard, Marc
name: Kashyap, Vinay L.
name: Drake, Jeremy J.
name: Guinan, Edward F.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: (Abridged) We investigate the EUV and X-ray flare rate distribution in radiated energy of the late-type active star AD Leo using long EUVE and BeppoSAX observations. We compare the observed light curves with light curves synthesized from model flares that are distributed in energy according to a power law with selectable index alpha (dN/dE ~ E^{-alpha}). Two methods are applied, the first comparing flux distributions of the binned data, and the second using the distributions of photon arrival time differences in the unbinned data. We find acceptable alpha values between 2.0-2.5 for the EUVE DS and the BeppoSAX LECS data. The BeppoSAX MECS data indicate a somewhat shallower energy distribution than the LECS data, which is attributed to the harder range of sensitivity of the MECS detector and the increasing peak temperatures of flares with increasing total (radiative) energy. The results suggest that flares can play an important role in the energy release of this active corona. We discuss caveats related to time variability, total energy, and multiple power-law distributions. Studying the limiting case of a corona that is entirely heated by a population of flares, we derive an expression for the time-averaged coronal differential emission measure distribution (DEM) that can be used as a diagnostic for the flare energy distribution. The shape of the analytical DEM agrees with previously published DEMs from observations of active stars.
description: 47 pages, 10 figures, accepted for publication in ApJ
Finding safe 3D robot grasps through efficient haptic exploration with unscented Bayesian optimization and collision penalty
Creators: name: Castanheira, Joao
name: Vicente, Pedro
name: Martinez-Cantin, Ruben
name: Jamone, Lorenzo
name: Bernardino, Alexandre
Publisher: name: arXiv
Year: 2024
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Robust grasping is a major, and still unsolved, problem in robotics. Information about the 3D shape of an object can be obtained either from prior knowledge (e.g., accurate models of known objects or approximate models of familiar objects) or real-time sensing (e.g., partial point clouds of unknown objects) and can be used to identify good potential grasps. However, due to modeling and sensing inaccuracies, local exploration is often needed to refine such grasps and successfully apply them in the real world. The recently proposed unscented Bayesian optimization technique can make such exploration safer by selecting grasps that are robust to uncertainty in the input space (e.g., inaccuracies in the grasp execution). Extending our previous work on 2D optimization, in this paper we propose a 3D haptic exploration strategy that combines unscented Bayesian optimization with a novel collision penalty heuristic to find safe grasps in a very efficient way: while by augmenting the search-space to 3D we are able to find better grasps, the collision penalty heuristic allows us to do so without increasing the number of exploration steps.
description: 2018 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS)
Charge inversion in colloidal systems
Creators: name: Messina, Rene
name: Holm, Christian
name: Kremer, Kurt
Publisher: name: arXiv
Year: 2002
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We investigate spherical macroions in the strong Coulomb coupling regime within the primitive model in salt-free environment. Molecular dynamics (MD) simulations are used to elucidate the effect of $discrete$ macroion charge distribution on charge inversion. A systematic comparison is made with the charge inversion obtained in the conventional continuous charge distribution. Furthermore the effect of multivalent counterions is reported.
description: 6 pages, LATEX (elsevier), 4 EPS files - Proceedings of CCP 2001 (Conference on Computational Physics 2001, Aachen, Germany 5-8 September 2001) - To appear in Computer Physics Communications
socio-economic factors affecting Decisions of Traditional Farmer on Investment in Livestock in Sharkia Governorate
Creators: name: Soliman, Ibrahim
name: Zaki, El-Shahat
name: Soliman, Ibrahim
name: Zaki, El-Shahat
Publisher: name: Unknown
Year: 1982
Subjects: subject: Consumer/Household Economics
subject: Farm Management
subject: Livestock Production/Industries
subject: Production Economics
subject: socio-economic
subject: Traditional Farmer
subject: Investment in Livestock
subject: Sharkia Governorate
subject: Egypt
subject: Households
subject: Livestock Holding Size

description: 7th International Congress for Statistics, Computer Science, Social and Demographic Research, 27 March-1 April 1982, Ain Shams University, Cairo, Egypt
Porochilus rendahli
Creators: name: Morgan, David L.
name: Allen, Gerald R.
name: Pusey, Bradley J.
name: Burrows, Damien W.
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Actinopterygii
Siluriformes
Plotosidae
Porochilus
Porochilus rendahli

description: Porochilus rendahli (Whitley)
Rendahl’s Catfish
 Within the Kimberley, Porochilus rendahli has previously been collected from the Fitzroy, King Edward, Carson, Pentecost and Ord Rivers (Fig. 12). The species, however, appears to be relatively uncommon in these systems, with only low numbers recorded (Allen & Allen 1998, Morgan et al. 2002, 2004a, 2006; Morgan in press). This species has occasionally been misidentified as the more common Neosilurus hyrtlii.
description: Published as part of Morgan, David L., Allen, Gerald R., Pusey, Bradley J. & Burrows, Damien W., 2011, 2816, pp. 1-64 in Zootaxa 2816 on page 12
livestock Working Power in Egyptian Agriculture
Creators: name: Soliman, Ibrahim
name: El-Shenawy, Mohamed
name: Soliman, Ibrahim
name: El-Shenawy, Mohamed
Publisher: name: Unknown
Year: 1983
Subjects: subject: Farm Management
subject: Livestock Production/Industries
subject: Public Economics
subject: Livestock
subject: Agricultural economics
subject: Egypt
subject: Manpower
subject: Output
subject: Loads(Forces)
subject: Economic factors
subject: Performance evaluation
subject: Milk
subject: Cattle
subject: Farms
subject: Area
subject: Foreign technology
subject: Developing country application
subject: Donkeys

description: The objectives of the study were (1) to examine the livestock work pattern as farm size changes, (2) to examine the relationships among human labor, livestock work, and machinery use as family size changes, and (3) to provide empirical estimates of the impact of livestock work-milk output, measuring its opportunity cost in lost milk production. First, since most animal power is used for transportation of inputs and outputs rather than direct farm production work, machinery may not replace animal power very rapidly. Second, although the machine-to-animal power ratio increased gradually with farm size, other power inputs ratios including machine-to-human labor did not.
description: The 18th Annual Conference of Statistics, Computer Science, Operations Research & Mathematics, 26-29 December, 1983, Volume 18 No.1 December 1983, Institute of Statistical Studies Research, Cairo University, Volume 18, No.1.
On static spherically symmetric solutions of the Bach-Einstein gravitational field equations
Creators: name: Schmidt, H. -J.
Publisher: name: arXiv
Year: 2001
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: For field equations of 4th order, following from a Lagrangian `Ricci scalar plus Weyl scalar', it is shown (using methods of non-standard analysis) that in a neighbourhood of Minkowski space there do not exist regular static spherically symmetric solutions. With that (besides the known local expansions about r = 0 and r = infinity resp.) for the first time a global statement on the existence of such solutions is given. Finally, this result will be discussed in connection with Einstein's particle programme.
description: 12 pages, LaTeX, no figure
Arrhamphus sclerolepis Gunther
Creators: name: Morgan, David L.
name: Allen, Gerald R.
name: Pusey, Bradley J.
name: Burrows, Damien W.
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Actinopterygii
Beloniformes
Hemiramphidae
Arrhamphus
Arrhamphus sclerolepis

description: Arrhamphus sclerolepis Günther
Snub-nose Garfish
 Although the species is widespread throughout northern Australia, within freshwaters of the Kimberley it is known only from two specimens captured at the base of King Cascades (brackish) in the Prince Regent River (Allen 1975) and from one specimen captured in the lower Ord River (Storey 2003) (Fig. 13). The species inhabits shallow coastal waters, estuaries and the lower reaches of rivers (Allen et al. 2002); thus its absence from most Kimberley rivers may be due to exclusion by waterfall barriers.
description: Published as part of Morgan, David L., Allen, Gerald R., Pusey, Bradley J. & Burrows, Damien W., 2011, 2816, pp. 1-64 in Zootaxa 2816 on page 12
Small Farms: Changing Structures and Roles in Economic Development
Creators: name: Von Braun, Joachim
name: Mirzabaev, Alisher
name: Von Braun, Joachim
name: Mirzabaev, Alisher
Publisher: name: Unknown
Year: 2015
Subjects: subject: Agribusiness
subject: Community/Rural/Urban Development
subject: Farm Management
subject: Production Economics
subject: Research and Development/Tech Change/Emerging Technologies
subject: Resource /Energy Economics and Policy
subject: small farms
subject: structural change
subject: farm size
subject: sustainability
subject: poverty reduction
subject: innovation

description: Small farms are the largest employment and small business group among the poor. Their businesses use mostly labor and local resources and face local constraints, but at the same time, they are affected by increasingly complex national and global economic changes, which lead to shifts in optimality and viability of structures and of their business priorities. This paper identifies basic forces of change in the small farm economy, proposes policies that may support productive and socially acceptable transformations, and highlights research priorities. The paper concludes that policies should primarily focus on people’s income opportunities in the rural economy, where small farmers often hold multiple farm and non-farm jobs, rather than be narrowly concerned with viability of the small scale farm enterprise.
Identifying a Sustainable Pathway to Household Multi-dimensional Poverty Reduction in Rural China
Creators: name: You, Jing
name: Kontoleon, Andreas
name: Wang, Sangui
name: You, Jing
name: Kontoleon, Andreas
name: Wang, Sangui
Publisher: name: Unknown
Year: 2015
Subjects: subject: Consumer/Household Economics
subject: Food Security and Poverty
subject: International Development
subject: poverty
subject: energy
subject: firewood
subject: dynamic causal effect
subject: China

description: Poor rural households in developing countries usually endure many-faceted burdens including monetary poverty, nutrition deficiency, and energy shortage due to reliance on limited local natural resources with low utilisation efficiency. This paper investigates a pathway for rural Chinese households to escape the vicious circle between multi-dimensional low wellbeing including deficiency of income, nutrition and energy without relying simply on excessive firewood plantations. We propose a dynamic and recursive multi-equation mixed model to capture the complex, endogenous, and causal inter-play between the above three dimensions of poverty and households’ environment-related livelihood arrangement, namely firewood plantations. We identify inter-locked traps in multi-dimensional poverty by exploiting household panel data. Firewood plantations offer a short-term solution. Increasing labour productivity and providing agricultural loans can break the circle in the longterm. Institutional instruments in terms of subsidising households to converting the cultivated land to forest or pasture play a limited role in limiting firewood production.
Tehran University Students
Creators: name: USIA
Publisher: name: Roper Center for Public Opinion Research
Year: 2022

description: Survey based on interviews with a sample of 300 students enrolled at Tehran University. Student aspirations in terms of their own future were idealistic, and their vocational. aspirations were not closely correlated with their own study nor with the occupations in Iran which had the greatest social status or prestige. As might be expected, particularly during a period of student demons­trations, there is much dissatisfaction with the University, particularly in terms of the curriculum, methods· of teaching, student-teacher relations and entrance examinations. Major sources for reading and reference material were, in order of decreasing importance, the University library; book-stores or news-stands; the public library and foreign Government libraries.
Impacts of Surface Ozone Pollution on Crop Productivity: Evidence from Winter Wheat in China
Creators: name: Yi, Fujin
name: Jiang, Fei
name: Zhong, Funing
name: Ding, Aijun
name: Zhou, Xun
name: Yi, Fujin
name: Jiang, Fei
name: Zhong, Funing
name: Ding, Aijun
name: Zhou, Xun
Publisher: name: Unknown
Year: 2015
Subjects: Crop Production/Industries
Environmental Economics and Policy
International Development

description: The impact of surface ozone pollution on the yield of winter wheat is empirically estimated by considering socio-economic and climatic determinants. This research is the first to use an economic framework to estimate the ozone impact, and a unique county-level panel is employed to examine the impact of the increase of surface ozone concentration on the productivity of winter wheat. In general, the increment of surface ozone concentration during the ozone-sensitive period of winter wheat is found harmful to its yield, and the damage to China’s grain supply and economic values are non-negligible. This study also confirms that other stress conditions, such as drought and air particles, can potentially mitigate the adverse effect of surface ozone exposure on the yield of winter wheat.
Modeling Farmers’ Adoption Decisions of Multiple Crop Technologies: The Case of Barley and Potatoes in Ethiopia
Creators: name: Yigezu, Yigezu A.
name: Tizale, Chilot Y.
name: Aw-Hassan, Aden
name: Yigezu, Yigezu A.
name: Tizale, Chilot Y.
name: Aw-Hassan, Aden
Publisher: name: Unknown
Year: 2015
Subjects: subject: Crop Production/Industries
subject: International Development
subject: adoption
subject: multiple technologies
subject: simultaneity
subject: multivariate tobit
subject: multivariate probit

description: This paper argues and provides empirical evidence that adoption decisions on multiple technologies involve a series of three sequential sub-decisions. Using a multivariate tobit and multivariate probit models and a nationally representative data from Ethiopian highlands, we find that decisions on the area shares of barley and potatoes in total farm size and the plot/field-level decision on the adoption of improved varieties of the two crops are independent. The farm-level decisions on the adoption of improved varieties of the two crops however exhibit strong simultaneity. A striking result from this analysis is that, the number of extension visits affects neither crop choice nor variety adoption decisions which, along with the relatively high density of extension agents in Ethiopia, shows the poor performance of the extension system. Targeting farmers dedicating higher proportion of their lands to the particular crop and introducing other models of extension could increase technology adoption.
Strongylura krefftii
Creators: name: Morgan, David L.
name: Allen, Gerald R.
name: Pusey, Bradley J.
name: Burrows, Damien W.
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Actinopterygii
Beloniformes
Belonidae
Strongylura
Strongylura krefftii

description: Strongylura krefftii (Günther)
Freshwater Longtom
 Strongylura krefftii is the sole freshwater member of the Belonidae found within the Kimberley. It has been collected only from the Fitzroy, Carson and Ord River systems (Fig. 14), but is probably more widespread. The species does not appear to be particularly abundant in Kimberley waters, and is rarely captured using gill nets or small seines.
description: Published as part of Morgan, David L., Allen, Gerald R., Pusey, Bradley J. & Burrows, Damien W., 2011, 2816, pp. 1-64 in Zootaxa 2816 on page 12
Organic transition: a business planner for farmers, ranchers and food entrepreneurs
Creators: name: DiGiacomo, Gigi
name: King, Robert P.
name: Nordquist, Dale
name: DiGiacomo, Gigi
name: King, Robert P.
name: Nordquist, Dale
Publisher: name: Unknown
Year: 2015
Subjects: Agricultural Finance
Farm Management

description: Published by the Sustainable Agriculture Research and Education (SARE) program, with funding from the National Institute of Food and Agriculture, U.S. Department of Agriculture.
Graded quiver varieties and singularities of normalized R-matrices for fundamental modules
Creators: name: Fujita, Ryo
Publisher: name: arXiv
Year: 2019
Subjects: subject: Representation Theory (math.RT)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: 17B37, 17B67

description: We present a simple unified formula expressing the denominators of the normalized R-matrices between the fundamental modules over the quantum loop algebras of type ADE. It has an interpretation in terms of representations of the Dynkin quivers and can be proved in a unified way using the geometry of graded quiver varieties. As a by-product, we obtain a geometric interpretation of Kang-Kashiwara-Kim's generalized quantum affine Schur-Weyl duality functor when it arises from a family of fundamental modules. We also study several cases when the graded quiver varieties are isomorphic to the graded nilpotent orbits of type A.
description: 37 pages, v4: minor revision, to appear in Sel. Math. New Ser
Four (Super)luminous Supernovae from the First Months of the ZTF Survey
Creators: name: Lunnan, R.
name: Yan, Lin
name: Perley, D. A.
name: Schulze, S.
name: Taggart, K.
name: Gal-Yam, A.
name: Fremling, C.
name: Soumagnac, M. T.
name: Ofek, E.
name: Adams, S. M.
name: Barbarino, C.
name: Bellm, E. C.
name: De, K.
name: Fransson, C.
name: Frederick, S.
name: Golkhou, V. Z.
name: Graham, M. J.
name: Hallakoun, N.
name: Ho, A. Y. Q.
name: Kasliwal, M. M.
name: Kaspi, S.
name: Kulkarni, S. R.
name: Laher, R. R.
name: Masci, F. J.
name: Nunez, F. Pozo
name: Rusholme, B.
name: Quimby, R. M.
name: Shupe, D. L.
name: Sollerman, J.
name: Taddia, F.
name: van Roestel, J.
name: Yang, Y.
name: Yao, Yuhan
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present photometry and spectroscopy of four hydrogen-poor luminous supernovae discovered during the two-month science commissioning and early operations of the Zwicky Transient Facility (ZTF) survey. Three of these objects, SN2018bym (ZTF18aapgrxo), SN2018avk (ZTF18aaisyyp) and SN2018bgv (ZTF18aavrmcg) resemble typical SLSN-I spectroscopically, while SN2018don (ZTF18aajqcue) may be an object similar to SN2007bi experiencing considerable host galaxy reddening, or an intrinsically long-lived, luminous and red SN Ic. We analyze the light curves, spectra, and host galaxy properties of these four objects and put them in context of the population of SLSN-I. SN2018bgv stands out as the fastest-rising SLSN-I observed to date, with a rest-frame g-band rise time of just 10 days from explosion to peak -- if it is powered by magnetar spin-down, the implied ejecta mass is only ~1 M$_{\odot}$. SN2018don also displays unusual properties -- in addition to its red colors and comparatively massive host galaxy, the light curve undergoes some of the strongest light curve undulations post-peak seen in a SLSN-I, which we speculate may be due to interaction with circumstellar material. We discuss the promises and challenges of finding SLSNe in large-scale surveys like ZTF given the observed diversity in the population.
description: Updated to match published version. Expanded discussion following referee comments; conclusions unchanged
Cash Transfers and Multiplier Effect: Lessons from the Grain Subsidy Program in China
Creators: name: Yi, Fujin
name: Lu, Wuyi
name: Zhou, Yingheng
name: Yi, Fujin
name: Lu, Wuyi
name: Zhou, Yingheng
Publisher: name: Unknown
Year: 2015
Subjects: Crop Production/Industries
International Development

description: This study examines the multiplier effects of the grain subsidy program in China, which is a large food self-sufficiency project that is implemented as a cash transfer program. Income multiplier effects have not been examined in the evaluation of the grain subsidy program although increasing the income of farmers is the original goal of this project. A large number of household-level observations are employed to measure the program’s income multiplier. Results show that the grain subsidy program has an unrealized high income multiplier, and the income promotion effect of the transferred subsidies is from agricultural production derived by intensifying various input uses for each unit of land. The multiplier effect can be particularly utilized by households with good education and poor farmers in less developed regions. Hence, to maximize the income multiplier effect, the grain subsidy distribution method should consider these criteria instead of retaining the prevalent standard that is based on contracted land areas.
Competing Order in the Mixed State of High Temperature Superconductors
Creators: name: Kivelson, Steven A.
name: Lee, Dung-Hai
name: Fradkin, Eduardo
name: Oganesyan, Vadim
Publisher: name: arXiv
Year: 2002
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We examine the low temperature behavior of the mixed state of a layered superconductor in the vicinity of a quantum critical point separating a pure superconducting phase from a phase in which a competing order coexists with superconductivity. At zero temperature, we find that there is an avoided critical point in the sense that the phase boundary in the limit $B\to 0$ does not connect to the B=0 critical point. Consequently, there exists a quasi-1D regime of the phase diagram, in which the competing order is largely confined to 1D ``halos'' about each vortex core, and in which interactions between neighboring vortices, although relevant at low temperature, are relatively weak.
description: 8 pages, 1 figure
Open problems on GKK tau-matrices
Creators: name: Holtz, Olga
name: Schneider, Hans
Publisher: name: arXiv
Year: 2001
Subjects: subject: Rings and Algebras (math.RA)
subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 15

description: We propose several open problems on GKK tau-matrices raised by examples showing that some such matrices are unstable
description: To appear in Linear Algebra and its Applications (LAA)
MOESM1 of A retro-inverso cell-penetrating peptide for siRNA delivery
Creators: name: Vaissière, Anaïs
name: Aldrian, Gudrun
name: Karidia Konate
name: Lindberg, Mattias
name: Jourdan, Carole
name: Telmar, Anthony
name: Seisel, Quentin
name: Fernandez, Frédéric
name: Viguier, Véronique
name: Genevois, Coralie
name: Couillaud, Franck
name: Boisguerin, Prisca
name: Deshayes, Sébastien
Publisher: name: figshare
Year: 2019
Subjects: subject: Biophysics
subject: Space Science
subject: Medicine
subject: Molecular Biology
subject: Pharmacology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences

description: Additional file 1. Supplementary information about circular dichroism analyses of RICK and isomers mixtures, characterization of peptide-based nanoparticles by DLS and TEM, mass spectra analyses of CADY-K, characterization of membrane interactions by fluorescence microscopy and principle of the Dual luciferase evaluation.