cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Some Nonlinear Problems Are as Easy as the Approximation Problem
Creators: name: Wasilkowski, Grzegorz W.
Publisher: name: Columbia University
Year: 1984
Subjects: Computer science

description: In this paper we study the following problem. Given an operator S and a subset F0 of some linear space, approximate S (f) for any f ∈ F0 possessing only partial information on f. Although all operators S considered here are nonlinear (e.g. min f(x). min|f(x) |. 1/f or ||f||, we prove that these problems are "equivalent" to the problem of approximating S(j)=f. i.e. S=I. This equivalence provides optimal (or nearly optimal) information and algorithms.
Equation of State from Potts-Percolation Model of a Solid
Creators: name: Kaufman, Miron
name: Diep, Hung The
Publisher: name: arXiv
Year: 2011
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We expand the Potts-percolation model of a solid to include stress and strain. Neighboring atoms are connected by bonds. We set the energy of a bond to be given by the Lennard-Jones potential. If the energy is larger than a threshold the bond is more likely to fail, while if the energy is lower than the threshold the bond is more likely to be alive. In two dimensions we compute the equation of state: stress as function of inter-atomic distance and temperature by using renormalization group and Monte Carlo simulations. The phase diagram, the equation of state, the isothermal modulus and the thermal expansion are determined. When the Potts heat capacity is divergent the continuous transition is replaced by a weak first-order transition through the van der Waals loop mechanism. When the Potts transition is first order the stress exhibits a large discontinuity as function of the inter-atomic distance.
description: to appear in Phys. Rev. E
Additional file 4 of Acupuncture for combat post-traumatic stress disorder: trial development and methodological approach for a randomized controlled clinical trial
Creators: name: Hollifield, Michael
name: Hsiao, An-Fu
name: Carrick, Kala
name: Gory Munoz, Andrea
name: Calloway, Teresa
name: Cocozza, Karen
name: Smith, Besa
name: Smith, Tyler
name: Jovanovic, Tanja
name: Norrholm, Seth
name: Sokhadze, Estate
name: Reist, Christopher
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Neuroscience
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Cancer
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 110309 Infectious Diseases

description: Additional file 4. Original Funding/Monitoring Documentation. DMC Charter.
High-resolution X-ray spectroscopy of the magnetic Of?p star HD148937
Creators: name: Naze, Y.
name: Zhekov, S. A.
name: Walborn, N. R.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: High-resolution data of the peculiar magnetic massive star HD148937 were obtained with Chandra-HETGS, and are presented here in combination with a re-analysis of the older XMM-RGS data. The lines of the high-Z elements (Mg, Si, S) were found to be unshifted and relatively narrow (FWHM of about 800km/s), i.e. narrower than the O line recorded by RGS, which possibly indicates that the hot plasma is multi-thermal and has several origins. These data further indicate a main plasma temperature of about 0.6keV and a formation of the X-ray emission at about one stellar radius above the photosphere. From the spectral fits and the H-to-He line ratios, the presence of very hot plasma is however confirmed, though with a smaller relative strength than for the prototype magnetic oblique rotator $θ^1$\,Ori\,C. Both stars thus share many similarities, but HD148937 appears less extreme than $θ^1$\,Ori\,C despite having also a large magnetic confinement parameter.
description: 13 pages, accepted for publication by ApJ
A Flexible Transaction Model for Software Engineering
Creators: name: Kaiser, Gail E.
Publisher: name: Columbia University
Year: 1989
Subjects: Computer science

description: It is generally recognized that the classical transaction model, providing atomicity and serializability, is too strong for certain application areas since it unnecessarily restricts concurrency. We are concerned with supporting cooperative work in multi-user design environments, particularly teams of programmers cooperating to develop and maintain software systems. We present an extended transaction model that meets the special requirements of software engineering projects, describe possible implementation techniques, and discuss a number of issues regarding the incorporation of such a model into multi-user software development environments.
What Is the Complexity of Elliptic Systems?
Creators: name: Werschulz, Arthur G.
Publisher: name: Columbia University
Year: 1984
Subjects: Computer science

description: This paper deals with the optimal solution of the Petrovsky-elliptic system lu = f, where l is of homogeneous order t and f (x) ∈ H (Ω).Of particular interest is the strength of finite element information (FEI) of degree k, as well as the quality of the finite element method (FEM) using this information. We show that the FEM is quasi-optimal iff k ≥ r+t - 1. Suppose this inequality is violated; is the lack of optimality in the FEM due to the information that it uses, or is it because the FEM makes inefficient use of its information! We show that the latter is the ease. The FEI is always quasi-optimal information. That is, the spline algorithm using FEI is always a quasi-optimal algorithm. In addition, we show that the asymptotic penalty for using the FEM when k is too small (rather than the spline algorithm which uses the same finite element information as the FEI) is unbounded.
Eddington-inspired Born-Infeld gravity. Phenomenology of non-linear gravity-matter coupling
Creators: name: Pani, Paolo
name: Delsate, Terence
name: Cardoso, Vitor
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Viable corrections to the matter sector of Poisson's equation may result in qualitatively different astrophysical phenomenology, for example the gravitational collapse and the properties of compact objects can change drastically. We discuss a class of modified non-relativistic theories and focus on a relativistic completion, Eddington-inspired Born-Infeld gravity. This recently proposed theory is equivalent to General Relativity in vacuum, but its non-trivial coupling to matter prevents singularities in early cosmology and in the non-relativistic collapse of non-interacting particles. We extend our previous analysis, discussing further developments. We present a full numerical study of spherically symmetric non-relativistic gravitational collapse of dust. For any positive coupling, the final state of the collapse is a regular pressureless star rather than a singularity. We also argue that there is no Chandrasekhar limit for the mass of non-relativistic white dwarf in this theory. Finally, we extend our previous results in the fully relativistic theory by constructing static and slowly rotating compact stars governed by nuclear-physics inspired equations of state. In the relativistic theory, there exists an upper bound on the mass of compact objects, suggesting that black holes can still be formed in the relativistic collapse.
description: 16 pages, 13 figures. v2: improved section on the linear structure of the theory, one reference added. Version accepted in PRD
Additional file 1 of Computational Applications in Secondary Metabolite Discovery (CAiSMD): an online workshop
Creators: name: Ntie-Kang, Fidele
name: Telukunta, Kiran K.
name: Fobofou, Serge A. T.
name: Chukwudi Osamor, Victor
name: Egieyeh, Samuel A.
name: Valli, Marilia
name: Djoumbou-Feunang, Yannick
name: Sorokina, Maria
name: Stork, Conrad
name: Mathai, Neann
name: Zierep, Paul
name: Chávez-Hernández, Ana L.
name: Duran-Frigola, Miquel
name: Babiaka, Smith B.
name: Tematio Fouedjou, Romuald
name: Eni, Donatus B.
name: Akame, Simeon
name: Arreyetta-Bawak, Augustine B.
name: Ebob, Oyere T.
name: Metuge, Jonathan A.
name: Bekono, Boris D.
name: Isa, Mustafa A.
name: Onuku, Raphael
name: Shadrack, Daniel M.
name: Musyoka, Thommas M.
name: Patil, Vaishali M.
name: van der Hooft, Justin J. J.
name: da Silva Bolzani, Vanderlan
name: Medina-Franco, José L.
name: Kirchmair, Johannes
name: Weber, Tilmann
name: Tastan Bishop, Özlem
name: Medema, Marnix H.
name: Wessjohann, Ludger A.
name: Ludwig-Müller, Jutta
Publisher: name: figshare
Year: 2021
Subjects: subject: Biochemistry
subject: Medicine
subject: Neuroscience
subject: Pharmacology
subject: Biotechnology
subject: Cancer
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: Computational Biology

description: Additional file 1. Workshop statistics.
Detection of Semi-Major Axis Drifts in 54 Near-Earth Asteroids: New Measurements of the Yarkovsky Effect
Creators: name: Nugent, C. R.
name: Margot, J. L.
name: Chesley, S. R.
name: Vokrouhlický, D.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We have identified and quantified semi-major axis drifts in Near-Earth Asteroids (NEAs) by performing orbital fits to optical and radar astrometry of all numbered NEAs. We focus on a subset of 54 NEAs that exhibit some of the most reliable and strongest drift rates. Our selection criteria include a Yarkovsky sensitivity metric that quantifies the detectability of semi-major axis drift in any given data set, a signal-to-noise metric, and orbital coverage requirements. In 42 cases, the observed drifts (~10^-3 AU/Myr) agree well with numerical estimates of Yarkovsky drifts. This agreement suggests that the Yarkovsky effect is the dominant non-gravitational process affecting these orbits, and allows us to derive constraints on asteroid physical properties. In 12 cases, the drifts exceed nominal Yarkovsky predictions, which could be due to inaccuracies in our knowledge of physical properties, faulty astrometry, or modeling errors. If these high rates cannot be ruled out by further observations or improvements in modeling, they would be indicative of the presence of an additional non-gravitational force, such as that resulting from a loss of mass of order a kilogram per second. We define the Yarkovsky efficiency f_Y as the ratio of the change in orbital energy to incident solar radiation energy, and we find that typical Yarkovsky efficiencies are ~10^-5.
description: Accepted for publication by The Astronomical Journal. 42 pages, 8 figures
An Experimental Hybrid User Interface for Collaboration
Creators: name: Butz, Andreas
name: Hollerer, Tobias
name: Beshers, Clifford
name: Feiner, Steven K.
name: MacIntyre, Blair
Publisher: name: Columbia University
Year: 1999
Subjects: Computer science

description: We present EMMIE (Environment Management for Multi-user Information Environments), an experimental user interface to a collaborative augmented environment. Users share a 3D virtual space and manipulate virtual objects representing information to be discussed. This approach not only allows for cooperation in a shared physical space, but also addresses tele-collaboration in physically separate but virtually shared spaces. We refer to EMMIE as a hybrid user interface because it combines a variety of different technologies and techniques, including virtual elements such as 3D widgets, and physical objects such as tracked displays and input devices. See-through head-worn displays overlay the virtual environment on the physical environment. Our research prototype includes additional 2D and 3D displays, ranging from palm-sized to wall-sized, allowing the most appropriate one to be used for any task. Objects can be moved among displays (including across dimensionalities) through drag & drop. In analogy to 2D window managers, we describe a prototype implementation of a shared 3Denvironment manager that is distributed across displays, machines, and operating systems. We also discuss two methods we are exploring for handling information privacy in such an environment.
The effects of snowlines on C/O in planetary atmospheres
Creators: name: Oberg, Karin I.
name: Murray-Clay, Ruth
name: Bergin, Edwin A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The C/O ratio is predicted to regulate the atmospheric chemistry in hot Jupiters. Recent observations suggest that some exo-planets, e.g. Wasp 12- b, have atmospheric C/O ratios substantially different from the solar value of 0.54. In this paper we present a mechanism that can produce such atmospheric deviations from the stellar C/O ratio. In protoplanetary disks, different snowlines of oxygen- and carbon-rich ices, especially water and carbon monoxide, will result in systematic variations in the C/O ratio both in the gas and in the condensed phase. In particular, between the H2O and CO snowlines most oxygen is present in icy grains - the building blocks of planetary cores in the core accretion model - while most carbon remains in the gas-phase. This region is coincidental with the giant-planet forming zone for a range of observed protoplanetary disks. Based on standard core accretion models of planet formation, gas giants that sweep up most of their atmospheres from disk gas outside of the water snowline will have C/O?1, while atmospheres significantly contaminated by evaporating planetesimals will have stellar or sub-stellar C/O when formed at the same disk radius. The overall metallicity will also depend on the atmosphere formation mechanism, and exoplanetary atmospheric compositions may therefore provide constraints on where and how a specific planet formed.
description: Accepted for publication in ApJL
A Configuration Process for a Distributed Software Development Environment
Creators: name: Ben-Shaul, Israel Z.
name: Kaiser, Gail E.
Publisher: name: Columbia University
Year: 1993
Subjects: Computer science

description: The authors describe work-in-progress on a configuration facility for a multi-site software development environment. The environment supports collaboration among geographically-dispersed teams of software developers. Addition and deletion of local subenvironment sites to a global environment is performed interactively inside any one of the existing local subenvironments, with the same user interface normally employed for invoking software development tools. This registration process is defined and executed using the same notation and mechanisms, respectively, as for the software development process. Everything described by the authors has been implemented and is working, but since they are in the midst of experimentation, they do not expect that the “final“ system will be exactly as described.
Resilient Anchors in the Southern Mediterranean
Creators: name: Kausch, Kristina
Publisher: name: Zenodo
Year: 2016
Subjects: Europe, European Union, European Neighbourhood Policy, Tunisia, Jordan, Morocco, Maghreb, North Africa, geopolitics, Mediterranean, foreign policy

description: Europe must invest more heavily in countries such as Jordan, Morocco, and Tunisia to help build regional players that are open to reform and resistant to crises.
Data and code for the study "Palliocystidium, a new genus in the family Hydnodontaceae (Trechisporales)"
Creators: name: Ordynets, Alexander
name: Gruhn, Gérald
Publisher: name: Zenodo
Year: 2023
Subjects: nuclear ribosomal DNA
ITS nc rDNA
28S nc rDNA
phylogenetic analysis
guanine-cytosine content
Species Hypothesis matching
morphometric analysis

description: This is a collection of data used in our study "Palliocystidium, a new genus in the family Hydnodontaceae (Trechisporales)".
 Background and aims – During fieldwork in French Guiana in 2018, two fungal specimens resembling the outstanding member of the genus Subulicystidium, viz. S. oberwinkleri, were collected. This study aims to clarify species- and genus-level assignment of this material from French Guiana and S. oberwinkleri.
 Material and methods – Corticioid fruiting bodies and spore prints were examined and measured under a light microscope. DNA sequences of the two nuclear ribosomal regions were used for Maximum likelihood and Bayesian phylogenetic analyses: (i) large subunit-coding DNA and (ii) internal transcribed spacer. Furthermore, guanine-cytosine content of the DNA region was calculated for (i), and UNITE Species Hypotheses Matching Analysis was performed for newly generated sequences of (ii).
 R code (as R Markdown files), input data and results of analyses (tables, tree files and publication-ready figures) are organized as R project.
 To reproduce analyses, unpack the archive, navigate to the root directory, launch the R project via opening .Rproj file. as well as R markdown files for particular analysis steps.
description: The director of Forêt et Risques Naturels of the French forestry office (ONF-DRFRN), and Paris French Museum (Patrinat) are acknowledged for funding the field trip.
Explanation-Based Learning: A Survey of Programs and Perspectives
Creators: name: Ellman, Thomas
Publisher: name: Columbia University
Year: 1987
Subjects: Computer science

description: "Explanation-Based learning" (EBl) is a technique by which an intelligent system can learn by observing examples. EBl systems are characterized by the ability to create justified generalizations from single training instances. They are also distinguished by their reliance on background knowledge of the domain under study. Although EBl is usually viewed as a method for performing generalization, it can be viewed in other ways as well. In particular, EBl can be seen as a method that performs four different learning tasks: generalization, chunking, operationalization and analogy. This paper provides a general introduction to the field of explanation-based learning. It places considerable emphasis on showing how EBl combines the four learning tasks mentioned above. The paper begins by presenting an intuitive example of the EBl technique. It subsequently places EBl in its historical context and describes the relation between EBl and other areas of machine learning. The major part of this paper is a survey of selected EBl programs. The programs have been chosen to show how EBl manifests each of the four learning tasks. Attempts to formalize the EBl technique are also briefly discussed. The paper concludes by discussing the limitations of EBl and the major open questions in the field.
title: Bericht der Römisch-Germanischen Kommission, Bd. 42 (1961): Bericht der Römisch-Germanischen Kommission
title: Bericht der Römisch-Germanischen Kommission
titleType: AlternativeTitle
Creators: name: Bericht Der Römisch-Germanischen Kommission
Publisher: name: Bericht der Römisch-Germanischen Kommission
Year: 2023

description: Fernhandel und Naturalwirtschaft im östlichen Merowingerreich nach archäologischen und numismatischen Zeugnissen...307-346 Inhaltsverzeichnis Widmung Titelei
Circuit Minimization Techniques Applied to Knowledge Engineering
Creators: name: Pasik, Alexander J.
Publisher: name: Columbia University
Year: 1987
Subjects: Computer science

description: Often knowledge engineers encounter situations during the interviewing process in which experts have difficulty expressing the knowledge to be captured. In these situations, the experts cannot readily present their knowledge so that the knowledge engineers can encode it in the chosen formalism (for example, in production rules). During the development of an expert system for underwriting homeowner insurance policies, this situation was occasionally encountered. When the experts could not express their knowledge in chunks suitable for encoding directly in production rules, circuit minimization techniques were used to construct the set of production rules from exhaustive tables of acquired knowledge. The techniques also served to find errors in the acquired knowledge. Circuit minimization techniques, therefore, have been found to provide valuable assistance in the knowledge engineering process, both in the acquisition and verification of knowledge.
Colorado water, November/December 2015
Creators: name: Middleton, Lindsey A.
name: Colorado Water Institute, Publisher
Publisher: name: Mountain Scholar
Year: 2015
Subjects: subject: Water resources development -- Colorado
subject: Water use -- Colorado
subject: Water-supply -- Colorado
subject: Water-supply -- Management -- Colorado

description: The newsletter is devoted to highlighting water research and activities at CSU and throughout Colorado.
description: Newsletter of the Colorado Water Center. Theme: Agricultural water conservation: tools, technology, and collaboration.
Points of continuity of quasiconvex functions on topological vector spaces
Creators: name: Rabier, Patrick J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Optimization and Control (math.OC)
subject: General Topology (math.GN)
subject: FOS: Mathematics

description: We give necessary and sufficient conditions for a real-valued quasiconvex function f on a Baire topological vector space X (in particular, Banach or Frechet space) to be continuous at the points of a residual subset of X. These conditions involve only simple topological properties of the lower level sets of f. A main ingredient consists in taking advantage of a remarkable property of quasiconvex functions relative to a topological variant of essential extrema on the open subsets of X. One application is that if f is quasiconvex and continuous at the points of a residual subset of X, then with a single possible exception, f^{-1}(a) is nowhere dense or has nonempty interior, as is the case for everywhere continuous functions. As a barely off-key complement, we also prove that every usc quasiconvex function is quasicontinuous in the (classical) sense of Kempisty since this interesting property does not seem to have been noticed before.
Density Waves Excited by Low-Mass Planets in Protoplanetary Disks II: High-Resolution Simulations of the Nonlinear Regime
Creators: name: Dong, Ruobing
name: Rafikov, Roman R.
name: Stone, James M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We investigate numerically the propagation of density waves excited by a low-mass planet in a protoplanetary disk in the nonlinear regime, using 2D local shearing box simulations with the grid-based code Athena at high spatial resolution (256 grid points per scale height h). The nonlinear evolution results in the wave steepening into a shock, causing damping and angular momentum transfer to the disk. On long timescales this leads to spatial redistribution of the disk density, causing migration feedback and potentially resulting in gap opening. Previous numerical studies concentrated on exploring these secondary phenomena as probes of the nonlinear wave evolution. Here we focus on exploring the evolution of the basic wave properties, such as its density profile evolution, shock formation, post-shock wave behavior, and provide comparison with analytical theory. The generation of potential vorticity at the shock is computed analytically and is subsequently verified by simulations and used to pinpoint the shock location. We confirm the theoretical relation between the shocking length and the planet mass (including the effect of the equation of state), and the post-shock decay of the angular momentum flux carried by the wave. The post-shock evolution of the wave profile is explored, and we quantitatively confirm its convergence to the theoretically expected N-wave shape. The accuracy of various numerical algorithms used to compute the nonlinear wave evolution is also investigated: we find that higher order spatial reconstruction and high resolution are crucial for capturing the shock formation correctly.
description: single column, 31 pages, 8 figures, 1 table, ApJ in press, minor corrections made
On the Application of Massively Parallel SIMD Tree Machines to Certain Intermediate-Level Vision Tasks
Creators: name: Ibrahim, Hussein
name: Kender, John R.
name: Shaw, David Elliot
Publisher: name: Columbia University
Year: 1985
Subjects: Computer science

description: In this paper, we examine the implementation of two middle-level image understanding tasks on fine-grained tree-structured SIMD machines, which have highly efficient VLSI implementations. We first present one such massively parallel machine called NON-VON, and summarize the cost/performance trade-offs of such machines for vision taks. We follow with a more detailed description of the NON-VON architecture (a prototype of which has been operational since January 1985), and of the high-level parallel language in which our algorithms have been written and simulated. The heart of the paper consists of the description and analysis of algorithms for a representative Hough transform, and of an algorithm for the interpretation of moving light displays. Novel algorithmic techniques are motivated and described, and simulation timings are presented and discussed. We conclude that it is possible to exploit the available massive parallelism while avoiding many of the communication bottlenecks common at this level of image understanding, by carefully and inexpensively duplicating data and/or control information, and by delaying or avoiding the reporting of intermediate results.
Computer Simulations− for Interpreting Muon-Spin Relaxation Experiments
Creators: name: Liborio, Leandro
name: Sturniolo, Simone
name: Jochym, Dominik
Publisher: name: Zenodo
Year: 2018
Subjects: Computer Simulations, Muons SPin Rotation

description: In this poster, I presented a summary of the computational methods that we had developed so far to estimate the muon stopping sites in crystalline materials. The poster presented the Unperturbed Electrostatic Potential method, our ab initio-based method and also the new methods based on Tight-Binding calculations.
Compression Waves and Phase Plots: Simulations
Creators: name: Orlikowski, Daniel
name: Minich, Roger
Publisher: name: arXiv
Year: 2011
Subjects: subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Compression wave analysis started nearly 50 years ago with Fowles.[1] Coperthwaite and Williams [2] gave a method that helps identify simple and steady waves. We have been developing a method that gives describes the non-isentropic character of compression waves, in general.[3] One result of that work is a simple analysis tool. Our method helps clearly identify when a compression wave is a simple wave, a steady wave (shock), and when the compression wave is in transition. This affects the analysis of compression wave experiments and the resulting extraction of the high-pressure equation of state.
How Do Transitions Within End-Stage Renal Disease Impact Health-Related Quality of Life?
Creators: name: Dumaine, Chance Skylar
Publisher: name: Cumming School of Medicine
Year: 2018
Subjects: subject: Dialysis
subject: Hemodialysis
subject: Peritoneal Dialysis
subject: Home Hemodialysis
subject: Health-related quality of life
subject: Dialysis Transitions
subject: Medicine and Surgery

description: Dialysis is used to sustain life for patients with end-stage renal disease (ESRD). While dialysis prolongs length of life, numerous studies have shown that dialysis patients have significantly reduced health-related quality of life (HRQoL). The degree of impairment seems to be partially related to dialysis modality [in-centre hemodialysis (IHD), peritoneal dialysis (PD), or home hemodialysis (HHD)], as patients on PD/HHD often have higher HRQoL scores than IHD patients. Patients may change dialysis modalities a number of times during their life. Each change is accompanied by a “transition period” (period of time in which patients adapt to life on their new modality). These transition periods are often marked by high rates of anxiety, depression, morbidity, and mortality, and are periods when HRQoL may change rapidly. However, few studies have examined the magnitude of change in HRQoL during transition periods or what the drivers of change are. Such studies are necessary to ensure that patients are provided with the necessary supports during their modality transition to prevent declines in HRQoL. In this pilot project, we tested the methodology of combining kidney disease-specific HRQoL questionnaires (Kidney Disease Quality of Life surveys) with semi-structured interviews in patients undergoing dialysis modality transitions. Patients completed KDQOL surveys prior to and 3 months after initiating a new dialysis modality and participated in semi-structured interviews to describe changes in HRQoL that occurred during the transition period. Regardless of dialysis modality being initiated, mean HRQoL scores as measured by the five domains of the KDQOL-36 improved over the initial 3 months of the transition period. Scores in additional domains of the KDQOL-Short Form were more variable, with improvements in some domains but reductions in others. Patient interviews highlighted many factors that negatively impacted HRQoL which may be amenable to intervention. Overall, combining the KDQOL tools with semi-structured patient interviews proved to be an effective method of studying changes in HRQoL that occur during modality transitions. Future studies may consider implementation of this model on a larger scale in order to better understand transition periods and to test interventions to prevent declines in HRQoL.
Benzofuran derivatives with nerve growth factor-potentiating activity from Phellinus ribis
Creators: name: Dong, Mei-Yue
name: Zhang, Yan
name: Jiang, Hai-Qiang
name: Ren, Wen-Jing
name: Xu, Ling-Chuan
name: Zhang, Yong-Qing
name: Liu, Yu-Hong
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biochemistry
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Hematology
subject: Plant Biology
subject: FOS: Biological sciences
subject: Virology

description: Three new benzofuran derivatives, namely ribisin E (1) ribisin F (2) along with ribisin G (3) were isolated from the MeOH extract of the fruiting bodies of Phellinus ribis. Their structures were elucidated based on the NMR analysis. Furthermore, the absolute configuration of ribisin E (1) and ribisin G (3) were deduced by the CD calculations, and the absolute configuration of ribisin F (2) was determined by comparing its CD spectrum and specific rotation with the data of known analogues. All compounds (1–3) exhibited the activity of promoting neurite outgrowth in nerve growth factor (NGF)-ediated PC 12 cell at concentrations ranging from 1 to 30 μM.
Pointer Analysis for C Programs Through AST Traversal
Creators: name: Buss, Marcio
name: Edwards, Stephen A.
name: Yao, Bin
name: Waddington, Daniel
Publisher: name: Columbia University
Year: 2005
Subjects: Computer science

description: We present a pointer analysis algorithm designed for source-to-source transformations. Existing techniques for pointer analysis apply a collection of inference rules to a dismantled intermediate form of the source program, making them difficult to apply to source-to-source tools that generally work on abstract syntax trees to preserve details of the source program. Our pointer analysis algorithm operates directly on the abstract syntax tree of a C program and uses a form of standard dataflow analysis to compute the desired points-to information. We have implemented our algorithm in a source-to-source translation framework and experimental results show that it is practical on real-world examples.
Additional file 1 of The praziquantel in preschoolers (PIP) trial: study protocol for a phase II PK/PD-driven randomised controlled trial of praziquantel in children under 4 years of age
Creators: name: Webb, Emily L.
name: Edielu, Andrew
name: Wu, Hannah W.
name: Kabatereine, Narcis B.
name: Tukahebwa, Edridah M.
name: Mubangizi, Alfred
name: Adriko, Moses
name: Elliott, Alison M.
name: Hope, William W.
name: Mawa, Patrice A.
name: Friedman, Jennifer F.
name: Bustinduy, Amaya L.
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Cell Biology
subject: Physiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: Biotechnology
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 110309 Infectious Diseases
subject: 60506 Virology
subject: Computational Biology

description: Additional file 1. SPIRIT Checklist.
Self-Gravitating Bjorken Flow
Creators: name: Feinstein, Alexander
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: I present a solution to the full Einstein-fluid equations representing a self-gravitating Bjorken flow. The motion and the geometry become inhomogeneous in the plane transversal to the flow and the energy density profile acquires, due to gravity, corrections in terms of proper time as compared to the original test hydrodynamics. The transverse distribution of energy density, for example, becomes $ε(τ,r)/ε(τ,0)\,=\, \cosh^{-4}{(3ar)}$
description: 6 pages
Detection of dark galaxies and circum-galactic filaments fluorescently illuminated by a quasar at z=2.4
Creators: name: Cantalupo, Sebastiano
name: Lilly, Simon J.
name: Haehnelt, Martin G.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: A deep narrow-band survey for Ly-alpha emission carried out on the VLT-FORS2 has revealed 98 Ly-alpha candidates down to a flux limit of 4.e-18 erg/s/cm^2 in a volume of 5500 comoving Mpc^3 at z=2.4 centered on the hyperluminous quasar HE0109-3518. The properties of the detected sources in terms of their i) equivalent width distribution, ii) luminosity function, and iii) the average luminosity versus projected distance from the quasar, all suggest that a large fraction of these objects have been fluorescently "illuminated" by HE0109-3518. This conclusion is supported by comparison with detailed radiative transfer simulations of the effects of the quasar illumination. 18 objects have a rest-frame Equivalent Width (EW0) larger than 240A, the expected limit for Ly-alpha emission powered by Population II star formation and 12 sources among these do not have any continuum counterpart in a deep V-band imaging of the same field. For these, a stacking analysis indicates EW0>800A, effectively ruling out Ly-alpha powered by internal star formation. These sources are thus the best candidates so far for proto-galactic clouds or "dark" galaxies at high-redshift, whose existence has recently been suggested by several theoretical studies. Assuming they are mostly ionized by the quasar radiation, we estimate that their gas masses would be about 10^9 Msun implying that their star formation efficiencies (SFE) are less than 1.e-11 yr^-1 several times below the SFE of the most gas-rich dwarf galaxies locally, and five hundred times lower than typical massive star-forming galaxies at z~2. We have also discovered extended, filamentary gas, also likely illuminated by the quasar, around some of the brightest continuum-detected sources with EW0>240A. This emission is compatible with the expectations for circum-galactic cold streams but other origins, including tidal stripping, are also possible.
description: 26 pages, 16 figures; MNRAS in press (accepted 2012 Jun 15); minor changes from previous version, typos corrected, references added
Holistic Twig Joins: Optimal XML Pattern Matching
Creators: name: Bruno, Nicolas
name: Koudas, Nick
name: Srivastava, Divesh
Publisher: name: Columbia University
Year: 2002
Subjects: Computer science

description: XML employs a tree-structured data model, and, naturally, XML queries specify patterns of selection predicates on multiple elements related by a tree structure. Finding all occurrences of such a twig pattern in an XML database is a core operation for XML query processing. Prior work has typically decomposed the twig pattern into binary structural (parent-child and ancestor-descendant) relationships, and twig matching is achieved by: (i) using structural join algorithms to match the binary relationships against the XML database, and (ii) stitching together these basic matches. A limitation of this approach for matching twig patterns is that intermediate result sizes can get large, even when the input and output sizes are more manageable. In this paper, we propose a novel holistic twig join algorithm, TwigStack, for matching an XML query twig pattern. Our technique uses a chain of linked stacks to compactly represent partial results to root-to-leaf query paths, which are then composed to obtain matches for the twig pattern. When the twig pattern uses only ancestor-descendant relationships between elements, TwigStack is I/O and CPU optimal among all sequential algorithms that read the entire input: it is linear in the sum of sizes of the input lists and the final result list, but independent of the sizes of intermediate results. We then show how to use (a modification of) B-trees, along with TwigStack, to match query twig patterns in sub-linear time. Finally, we complement our analysis with experimental results on a range of real and synthetic data, and query twig patterns.
Additional file 2 of Computational Applications in Secondary Metabolite Discovery (CAiSMD): an online workshop
Creators: name: Ntie-Kang, Fidele
name: Telukunta, Kiran K.
name: Fobofou, Serge A. T.
name: Chukwudi Osamor, Victor
name: Egieyeh, Samuel A.
name: Valli, Marilia
name: Djoumbou-Feunang, Yannick
name: Sorokina, Maria
name: Stork, Conrad
name: Mathai, Neann
name: Zierep, Paul
name: Chávez-Hernández, Ana L.
name: Duran-Frigola, Miquel
name: Babiaka, Smith B.
name: Tematio Fouedjou, Romuald
name: Eni, Donatus B.
name: Akame, Simeon
name: Arreyetta-Bawak, Augustine B.
name: Ebob, Oyere T.
name: Metuge, Jonathan A.
name: Bekono, Boris D.
name: Isa, Mustafa A.
name: Onuku, Raphael
name: Shadrack, Daniel M.
name: Musyoka, Thommas M.
name: Patil, Vaishali M.
name: van der Hooft, Justin J. J.
name: da Silva Bolzani, Vanderlan
name: Medina-Franco, José L.
name: Kirchmair, Johannes
name: Weber, Tilmann
name: Tastan Bishop, Özlem
name: Medema, Marnix H.
name: Wessjohann, Ludger A.
name: Ludwig-Müller, Jutta
Publisher: name: figshare
Year: 2021
Subjects: subject: Biochemistry
subject: Medicine
subject: Neuroscience
subject: Pharmacology
subject: Biotechnology
subject: Cancer
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: Computational Biology

description: Additional file 2. CAiSMD Feedback form.
Colorado water, October 2001
Creators: name: Flanagan, Marian
name: Blackledge, Michael
name: Miller, Shirley
name: Colorado Water Resources Research Institute, Publisher
Publisher: name: Mountain Scholar
Year: 2001
Subjects: subject: Water resources development -- Colorado
subject: Water use -- Colorado
subject: Water-supply -- Colorado
subject: Water-supply -- Management -- Colorado

description: The scope of the newsletter is devoted to enhancing communication between Colorado water users and managers and faculty at the research universities in the state.
description: Newsletter of the Water Center at Colorado State University.
Structure and arithmetic in sets
Creators: name: Chipeniuk, Karsten
Publisher: name: University of British Columbia
Year: 2011

description: We prove results in arithmetic combinatorics involving sums of prime numbers and also some variants of the Erdös-Szemerédi sum-product phenomenon. In particular, we prove nontrivial lower bounds on the density in the integers of the sumset of a positive relative density subset of the primes. The proof of this result uses Green and Green-Tao pseudorandomness arguments to reduce the problem to an analogous statement for relatively dense subsets of the multiplicative subgroup of integers modulo a large integer N. The latter statement is resolved with a combinatorial argument which bounds high moments of a representation function. We also show that if two distinct sets A and B of complex numbers have very small productset, then they produce maximally large iterated sumsets. This uses an algebraic concept of the multiplicative dimension of a finite set. As an application of the case A=B, we obtain a quantitative version of a result of Chang on sums and products of distinct complex elements.
Time-Constrained Communication in Multiple Access Networks
Creators: name: Kurose, James F.
Publisher: name: Columbia University
Year: 1984
Subjects: Computer science

description: The characteristics of time-constrained communication applications,' such as packetized voice, differ significantly from those of standard data communication applications. First, messages not received within a fixed amount of time after their generation at a sending station are considered lost. Secondly, a certain amount of message loss is tolerable. In this thesis we address the problem of supporting time constrained communication applications in a multiple access network. The principal contributions of this thesis fall into two categories. The first contribution is the development and analysis of a new class of protocols for supporting multi-access time-constrained communication. These protocols are based on a generalization of the time window mechanism and provide a family of network-wide message transmission scheduling disciplines based on message generation times. The problem of determining the optimal elements of the protocol's window selection policy is addressed. A semi-markov decision model is formulated for protocol operation and the optimal elements of the windowing policy are found to be both simple and intuitive. The extension of the protocol for transmitting both time-constrained and non-time-constrained messages is considered. In our scheme, time-constrained traffic, when transmitted, receives preemptive priority over other classes of traffic. Several novel analytic performance models are developed and validated through simulation. The protocol's time-constrained performance is found to critically depend on its imposed scheduling function and is significantly better under the optimal windowing policy elements than under other policy elements. For multiple classes of traffic, our results indicate that trading time-constrained message loss against the average delay of non-time-constrained traffic is not usually a viable option. The second major contribution of this thesis is the development of a systematic, formal approach towards distributed optimization via a fictitious resource sharing paradigm and a decentralized "microeconomics" solution to the resource sharing problem. This approach, which draws on previous work In mathematical economics, is successfully used to compute the optimum transmission probabilities for both the time window and Slotted Aloha protocols. Interestingly, several network mechanisms, such as flow control and priorities, are found to emerge naturally from this approach.
A Survey of Automated Consulting in Interactive Programming Environments
Creators: name: Wolz, Ursula
Publisher: name: Columbia University
Year: 1987
Subjects: Computer science

description: This paper surveys the Computer Science Literature on consulting in interactive programming environments. Three types of consulting behavior are described: systems that provide relief from mundane detail; systems that provide information; and systems that tutor new skills. Two themes run through research on all three types of systems. First, a distinction is drawn between an expert and a novice user. Most systems are geared for one or the other but not both. Second, current research on all three types indicates a need for taking users' goals into account Systems must include consulting behavior that goes beyond the surface or syntactic level.
An Experimental System for the Integration of Information from Stereo and Multiple Shape From Texture Algorithms
Creators: name: Boult, Terrance E.
name: Moerdler, Mark
Publisher: name: Columbia University
Year: 1987
Subjects: Computer science

description: In numerous computer vision applications, there is both the need and the ability to access multiple types of information about the three dimensional aspects of objects or surfaces. When this information comes from different sources the combination becomes non-trivial. This paper describes the present state of ongoing research in Columbia's Vision Laboratory in the integration of multiple visual sensing methodologies which yield three dimensional information, in particular, feature based stereo algorithms, and various shape-from-texture algorithms are already in operation and multi-view shape-from-texture and shape-from shading modules are expected to be incorporated. Unlike most systems for multi-sensor integration, which fuse all the information at one conceptual level, e.g., the surface level, the system under development uses two levels of data fusion, intra-process integration and inter-process integration. The paper discusses intra-process integration techniques for feature-based stereo and shape-from-texture algorithms. It also discusses an inter-process integration technique based on smooth models of surfaces. Examples are presented using camera acquired images.
title: Does parental mediation moderate the longitudinal association among bystanders and perpetrators and victims of cyberbullying?
Creators: name: Wright, Michelle F.
name: Wachs, Sebastian
Publisher: name: Universität Potsdam
Year: 2020
Subjects: subject: 300 Sozialwissenschaften

description: The purpose of the present study was to examine the moderation of parental mediation in the longitudinal association between being a bystander of cyberbullying and cyberbullying perpetration and cyberbullying victimization. Participants were 1067 7th and 8th graders between 12 and 15 years old (51% female) from six middle schools in predominantly middle-class neighborhoods in the Midwestern United States. Increases in being bystanders of cyberbullying was related positively to restrictive and instructive parental mediation. Restrictive parental mediation was related positively to Time 2 (T2) cyberbullying victimization, while instructive parental mediation was negatively related to T2 cyberbullying perpetration and victimization. Restrictive parental mediation was a moderator in the association between bystanders of cyberbullying and T2 cyberbullying victimization. Increases in restrictive parental mediation strengthened the positive relationship between these variables. In addition, instructive mediation moderated the association between bystanders of cyberbullying and T2 cyberbullying victimization such that increases in this form of parental mediation strategy weakened the association between bystanders of cyberbullying and T2 cyberbullying victimization. The current findings indicate a need for parents to be aware of how they can impact adolescents’ involvement in cyberbullying as bullies and victims. In addition, greater attention should be given to developing parental intervention programs that focus on the role of parents in helping to mitigate adolescents’ likelihood of cyberbullying involvement.
description: Postprints der Universität Potsdam : Humanwissenschaftliche Reihe; 679