cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Definable convolution and idempotent Keisler measures II
Creators: name: Chernikov, Artem
name: Gannon, Kyle
Publisher: name: arXiv
Year: 2022
Subjects: subject: Logic (math.LO)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 03C45, 37B05, 43A10, 03C60, 28D15

description: We study convolution semigroups of invariant/finitely satisfiable Keisler measures in NIP groups. We show that the ideal (Ellis) subgroups are always trivial and describe minimal left ideals in the definably amenable case, demonstrating that they always form a Bauer simplex. Under some assumptions, we give an explicit construction of a minimal left ideal in the semigroup of measures from a minimal left ideal in the corresponding semigroup of types (this includes the case of SL$_{2}(\mathbb{R})$, which is not definably amenable). We also show that the canonical push-forward map is a homomorphism from definable convolution on $\mathcal{G}$ to classical convolution on the compact group $\mathcal{G}/\mathcal{G}^{00}$, and use it to classify $\mathcal{G}^{00}$-invariant idempotent measures.
description: 40 pages; minor corrections, clarifications and improvements throughout the text following referee's report; accepted to Model Theory (special issue dedicated to Ehud Hrushovski)
Trivial Meet and Join within the Lattice of Monotone Triangles
Creators: name: Engbers, John
name: Hammett, Adam
Publisher: name: arXiv
Year: 2014
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05A05, 05A16, 06A07, 60C05

description: The lattice of monotone triangles $(\mathfrak{M}_n,\le)$ ordered by entry-wise comparisons is studied. Let $τ_{\min}$ denote the unique minimal element in this lattice, and $τ_{\max}$ the unique maximum. The number of $r$-tuples of monotone triangles $(τ_1,\ldots,τ_r)$ with minimal infimum $τ_{\min}$ (maximal supremum $τ_{\max}$, resp.) is shown to asymptotically approach $r|\mathfrak{M}_n|^{r-1}$ as $n \to \infty$. Thus, with high probability this event implies that one of the $τ_i$ is $τ_{\min}$ ($τ_{\max}$, resp.). Higher-order error terms are also discussed.
description: 15 pages
British Columbia Legislative Assembly sessional clipping book (1921-03)
Creators: name: :Unav
Publisher: name: University of Victoria Libraries
Year: 2022
Subjects: subject: Law
valueUri: http://id.worldcat.org/fast/993678
subject: FOS: Law
subject: Politics and government
valueUri: http://id.worldcat.org/fast/1919741
subject: British Columbia. Legislative Assembly
valueUri: http://id.worldcat.org/fast/600765

description: These Sessional Clippings books cover the period 1891 to 1972, and include newspaper accounts written by various legislative reporters who covered debates occurring in the British Columbia Legislative Assembly. Transcripts of debates of the Legislative Assembly (Hansard) were not published in B.C. until 1970; hence these "Sessional Clipping Books" augment the "Journals", the record of daily proceedings of the Legislative Assembly. Selected clippings from various newspapers including the Vancouver Sun, the Vancouver Province, the Colonist, and the Times newspapers, relating to the newspaper reports concerning activities of the Legislature. The original sessional clippings books comprise 351 ledger size print volumes, held at the Legislative Library in Victoria BC. The print volumes were microfilmed onto 26 reels in 1977 under a Tri University Libraries (TRIUL) project by Precision Micrographic Services (Vancouver, B.C.), with the permission of the Legislative Library, Victoria, British Columbia. This digital collection was created by scanning the 26 microfilm reels.
Echimys nigrispinus
Creators: name: Honacki, James H.
name: Kinman, Kenneth E.
name: Koeppl, James W.
Publisher: name: Zenodo
Year: 1982
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Rodentia
Echimyidae
Echimys
Echimys nigrispinus

description: Echimys nigrispinus (Wagner, 1842). Arch. Naturg., 1:361. TYPE LOCALITY: Brazil, Sao Paulo, Ipanema. DISTRIBUTION: E. Brazil. ISIS NUMBER: 5301410029005008001.
description: Published as part of James H. Honacki, Kenneth E. Kinman & James W. Koeppl, 1982, Order Rodentia (Part 6), pp. 560-594 in Mammal Species of the World (1 st Edition), Lawrence, Kansas, USA :Alien Press, Inc. & The Association of Systematics Collections on page 587, DOI: 10.5281/zenodo.7353039
Chaos in heterogeneous neural networks: II. Multiple activity modes
Creators: name: Stern, Merav
name: Aljadeff, Johnatan
name: Sharpee, Tatyana
Publisher: name: Columbia University
Year: 2014
Subjects: subject: Neural networks (Neurobiology)
subject: Neurosciences
subject: FOS: Clinical medicine

description: We study the activity of a recurrent neural network consisting of multiple cell groups through the structure of its correlations by showing how the rules that govern the strengths of connections between the different cell groups shape the average autocorrelation found in each group. We derive an analytical expression for the number of independent autocorrelation modes the network can concurrently sustain. Each mode corresponds to a non-zero component of the network’s autocorrelation, when it is projected on a specific set of basis vectors. In a companion abstract we derive a formula for the first mode, and hence the entire network, to become active. When the network is just above the critical point where it becomes active all groups of cells have the same autocorrelation function up to a constant multiplicative factor. We derive here a formula for this multiplicative factor which is in fact the ratio of the average firing rate of each group. As the effective synaptic gain grows a second activity mode appears, the autocorrelation functions of each group have different shapes, and the network becomes doubly chaotic. We generalize this result to understand how many modes of activity can be found in a heterogeneous network based on its connectivity structure. Finally, we use our theory to understand the dynamics of a clustered network where cells from the same group are strongly connected compared to cells from different groups. We show how this structure can lead to a one or more activity modes and interesting switching effects in the identity of the dominant cluster.
Star sorts, Lelek fans, and the reconstruction of non-$\aleph\_0$-categorical theories in continuous logic
Creators: name: Yaacov, Itaï Ben
Publisher: name: arXiv
Year: 2022
Subjects: subject: Logic (math.LO)
subject: FOS: Mathematics

description: We prove a reconstruction theorem valid for arbitrary theories in continuous (or classical) logic in a countable language, that is to say that we provide a complete bi-interpretation invariant for such theories, taking the form of an open Polish topological groupoid. More explicitly, for every such theory $T$ we construct a groupoid $\mathbf{G}^*(T)$ that only depends on the bi-interpretation class of $T$, and conversely, we reconstruct from $\mathbf{G}^*(T)$ a theory that is bi-interpretable with $T$. The basis of $\mathbf{G}^*(T)$ (namely, the set of objects, when viewed as a category) is always homeomorphic to the Lelek fan. We break the construction of the invariant into two steps. In the second step we construct a groupoid from any \emph{reconstruction sort}, while in the first step such a sort is constructed. This allows us to place our result in a common framework with previously established ones, which only differ by their different choice of a reconstruction sort.
Probing non-Gaussian correlations through entanglement generation in a many-body quantum system
Creators: name: van de Kraats, J.
name: Ahmed-Braun, D. J. M.
name: Colussi, V. E.
name: Kokkelmans, S. J. J. M. F.
Publisher: name: arXiv
Year: 2025
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In understanding strongly correlated quantum systems, quantifying the non-Gaussian nature of interparticle correlations is invaluable. We show that, for a uniform quantum gas, there exists a natural connection between non-Gaussian correlations and the generation of momentum-space entanglement. Furthermore, this entanglement can be directly measured in an experiment using time-of-flight techniques. To prototype our method, we numerically study entanglement generation in a degenerate Bose gas following a quench to the unitary regime, where Gaussian and non-Gaussian correlations are generated sequentially in time.
description: 21 pages, 3+1 figures
Electronic structure of the highly conductive perovskite oxide SrMoO$_3$
Creators: name: Cappelli, E.
name: Hampel, A.
name: Chikina, A.
name: Guedes, E. Bonini
name: Gatti, G.
name: Hunter, A.
name: Issing, J.
name: Biskup, N.
name: Varela, M.
name: Dreyer, Cyrus E.
name: Tamai, A.
name: Georges, A.
name: Bruno, F. Y.
name: Radovic, M.
name: Baumberger, F.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We use angle-resolved photoemission to map the Fermi surface and quasiparticle dispersion of bulk-like thin films of SrMoO$_3$ grown by pulsed laser deposition. The electronic self-energy deduced from our data reveals weak to moderate correlations in SrMoO$_3$, consistent with our observation of well-defined electronic states over the entire occupied band width. We further introduce spectral function calculations that combine dynamical mean-field theory with an unfolding procedure of density functional calculations and demonstrate good agreement of this approach with our experiments.
New Manufacturing Plant in the Nonmetro Ozarks Region
Creators: name: Kuehn, John A.
name: Braschler, Curtis
name: Kuehn, John A.
name: Braschler, Curtis
Publisher: name: Unknown
Year: 1977
Subjects: subject: Community/Rural/Urban Development
subject: Labor and Human Capital
subject: Industrial development
subject: Industrial mix
subject: Manufacturing
subject: Regional growth
subject: Rural industrial growth
subject: Ozarks region

description: From 1967 to 1974, more manufacturing plants of all sizes located in nonmetro communities than in metro areas in the five Ozarks States. Most of the new nonmetro plants were located in towns of less than 25,000 population not near metro core cities. New manufacturing plants with 10 or more employees were widely dispersed among nonmetro towns; 497 towns acquired new plants. Over 60 percent of all nonmetro towns of 2,500 or more population acquired new plants employing 10 or more workers; 241 towns of less than 2,500 population acquired such plants. Dispersed nonmetro location was greater during the latter part of the study period than the early part. New plants within the Ozarks nonmetro areas were very diversified, with 286 different industries represented.
Multi-plectoneme phase of double-stranded DNA under torsion
Creators: name: Emanuel, Marc
name: Lanzani, Giovanni
name: Schiessel, Helmut
Publisher: name: arXiv
Year: 2013
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Biological Physics (physics.bio-ph)
subject: Biomolecules (q-bio.BM)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: We use the worm-like chain model to study supercoiling of DNA under tension and torque. The model reproduces experimental data for a broad range of forces, salt concentrations and contour lengths. We find a plane of first order phase transitions ending in a smeared out line of critical points, the multi-plectoneme phase, which is characterized by a fast twist mediated diffusion of plectonemes and a torque that rises after plectoneme formation with increasing linking number. The discovery of this new phase at the same time resolves the discrepancies between existing models and experiment.
description: 27 pages, 19 figures, submitted to Physical Review E
Chaos in heterogeneous neural networks: I. The critical transition point
Creators: name: Aljadeff, Johnatan
name: Stern, Merav
name: Sharpee, Tatyana
Publisher: name: Columbia University
Year: 2014
Subjects: subject: Neural networks (Neurobiology)
subject: Neurosciences
subject: FOS: Clinical medicine

description: There is accumulating evidence that biological neural networks possess optimal computational capacity when they are at or near a critical point in which the network transitions to a chaotic regime. We derive a formula for the critical point of a general heterogeneous neural network. This formula relates the structure of the network to its critical point. The heterogeneity of the network may describe the spatial structure, a multiplicity of cell types or any selective connectivity rules.
Learning phase transitions from regression uncertainty: A new regression-based machine learning approach for automated detection of phases of matter
Creators: name: Guo, Wei-Chen
name: He, Liang
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: For performing regression tasks involved in various physics problems, enhancing the precision or equivalently reducing the uncertainty of regression results is undoubtedly one of the central goals. Here, somewhat surprisingly, we find that the unfavorable regression uncertainty in performing the regression tasks of inverse statistical problems actually contains hidden information concerning the phase transitions of the system under consideration. By utilizing this hidden information, we develop a new unsupervised machine learning approach for automated detection of phases of matter, dubbed learning from regression uncertainty. This is achieved by revealing an intrinsic connection between regression uncertainty and response properties of the system, thus making the outputs of this machine learning approach directly interpretable via conventional notions of physics. We demonstrate the approach by identifying the critical points of the ferromagnetic Ising model and the three-state clock model, and revealing the existence of the intermediate phase in the six-state and seven-state clock models. Comparing to the widely-used classification-based approaches developed so far, although successful, their recognized classes of patterns are essentially abstract, which hinders their straightforward relation to conventional notions of physics. These challenges persist even when one employs the state-of-the-art deep neural networks that excel at classification tasks. In contrast, with the core working horse being a neural network performing regression tasks, our new approach is not only practically more efficient, but also paves the way towards intriguing possibilities for unveiling new physics via machine learning in a physically interpretable manner.
description: 11 pages, 7 figures
Cartier transform and prismatic crystals
Creators: name: Gros, Michel
name: Stum, Bernard Le
name: Quirós, Adolfo
Publisher: name: arXiv
Year: 2022
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 05A30, 13N10, 14F30, 14F40

description: We show that the abstract equivalence of categories, called Cartier transform, between crystals on the q-crystalline and prismatic sites can be locally identified with the explicit local q-twisted Simpson correspondence. This establishes four equivalences that are all compatible with the relevant cohomology theories. We restrict ourselves for simplicity to the dimension one situation.
The productivity effects of worker participation: Producer cooperatives in western economies
Creators: name: Estrin, Saul
name: Jones, Derek C.
name: Svejnar, Jan
Publisher: name: Columbia University
Year: 1987
Subjects: Management--Employee participation--Economic aspects
Industrial productivity--Econometric models
Economics
Commerce

description: The paper presents econometric estimates of productivity effects of various forms of worker participation in Western producer cooperatives. While the effects vary across institutional settings, the overall effect is found to be positive. The positive effects are found most uniformly with respect to profit sharing and, to a slightly lesser extent, individual capital (share) ownership and participation in decision-making by workers. The size of individual worker loans to the coop is unrelated to productivity, while collective capital ownership exhibits an insignificant or a negative productivity effect.
Learning Whole Heart Mesh Generation From Patient Images For Computational Simulations
Creators: name: Kong, Fanwei
name: Shadden, Shawn
Publisher: name: arXiv
Year: 2022
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computational Engineering, Finance, and Science (cs.CE)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Medical Physics (physics.med-ph)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Patient-specific cardiac modeling combines geometries of the heart derived from medical images and biophysical simulations to predict various aspects of cardiac function. However, generating simulation-suitable models of the heart from patient image data often requires complicated procedures and significant human effort. We present a fast and automated deep-learning method to construct simulation-suitable models of the heart from medical images. The approach constructs meshes from 3D patient images by learning to deform a small set of deformation handles on a whole heart template. For both 3D CT and MR data, this method achieves promising accuracy for whole heart reconstruction, consistently outperforming prior methods in constructing simulation-suitable meshes of the heart. When evaluated on time-series CT data, this method produced more anatomically and temporally consistent geometries than prior methods, and was able to produce geometries that better satisfy modeling requirements for cardiac flow simulations. Our source code and pretrained networks are available at https://github.com/fkong7/HeartDeformNets.
On the theory of a participatory firm
Creators: name: Svejnar, Jan
Publisher: name: Columbia University
Year: 1982
Subjects: Business enterprises--Economic aspects
Industrial organization (Economic theory)
Management--Employee participation
Economics

description: Firms in which several different actors (or groups of actors)’ jointly determine company policy have come into existence in an increasing number of countries.2 Yet, with the exception of Steinherr’s (1977) model, the existing theories of the firm generally do not reflect the institutional framework of a participatory firm. This paper presents two theoretical models of such a firm. The approach is quite general and nests the established theories of the firm as limiting cases. Employee participation in management has been instituted primarily by law and in countries with a strong trade union movement.3 For this reason, possible influences of different systems of labor relations and trade union structures on the behavior of a participatory firm need to be explored. In this context it is shown that two different realistic assumptions about the objective functions of the relevant actors (or groups of actors) lead to strikingly different results in terms of the social efficiency of factor allocation. This finding is significant not only for the theory of a participatory firm but also for the theoretically limiting cases of a fully labor-managed firm or a traditional capitalist firm under collective bargaining.
The economics of joint ventures in centrally planned and labor-managed economies
Creators: name: Svejnar, Jan
name: Smith, Stephen C.
Publisher: name: Columbia University
Year: 1982
Subjects: International business enterprises--Economic aspects
Joint ventures--Economic aspects
Central planning
Economics
Commerce

description: The paper analyzes the allocational and distributional issues connected with the operation of joint ventures by firms in Yugoslavia, several Eastern European countries and the People's Republic of China with Western firms. A variable-bargaining-power model is used to examine the behavior of joint ventures under the various institutional circumstances of these countries. Contrary to Brada's conclusions (J. Comp. Econ. 1(2):167–181, June 1977), the present study indicates that the behavior of joint ventures in most of these countries is likely to be quite similar.
Mechanical Harvesting of Wine Grapes
Creators: name: Johnson, Stanley S.
name: Johnson, Stanley S.
Publisher: name: Unknown
Year: 1977
Subjects: subject: Crop Production/Industries
subject: Labor and Human Capital
subject: Production Economics
subject: Productivity Analysis
subject: Research and Development/Tech Change/Emerging Technologies
subject: Harvesting
subject: grapes
subject: labor
subject: mechanization

description: Mechanization of the California wine grape harvest has slowed, with no rapid increase expected for the immediate future. However, a lot depends on solving current problems of wine quality using mechanically harvested grapes and machine damage to vines as well as generally low grape prices and the labor situation. The study points out that mechanical harvesting is only economical on larger acreages. For example, at an 8-ton-per-acre yield in 1972, a farm would have to be 220 acres in size in order for mechanical harvesting costs to break even with those of hand harvesting. On the other hand, if farmworker wages went up by a fourth or more over other costs, machine harvesting could increase the competitive edge. In general, owners of mechanical harvesters viewed their machines favorably, most often noting that they liked the increased control over their operations and the relative freedom from labor problems. Operational problems cited were vine and stake damage and juicing of the grapes.
Structural adjustment policies and productive efficiency of socialist enterprises
Creators: name: Prasnikar, Janez
name: Svejnar, Jan
name: Klinedinst, Mark
Publisher: name: Columbia University
Year: 1992
Subjects: Socialism--Economic aspects
Business enterprises--Economic aspects
Structural adjustment (Economic policy)
Economics
Public policy (Law)

description: The paper uses panel data from a five percent stratified random sample of Yugoslav industrial enterprises to test several hypotheses about the determinants of productive efficiency. The estimating procedure selects the production function best supported by the data and allows for industry-specific production function parameters as well as from firm-specific fixed or random effects. The instrumental variable estimates suggest that productive efficiency is unaffected by the four structural/policy variables whose effect we examine: the extent of export orientation, joint venture status, divisionalization of the firm, and the firm's market share.
Allocapnia sandersoni Ricker 1952
Creators: name: Stark, Bill P.
name: Kondratieff, Boris C.
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Plecoptera
Capniidae
Allocapnia
Allocapnia sandersoni

description: Allocapnia sandersoni Ricker (Figs. 103-108) Allocapnia sandersoni Ricker 1952:165. Holotype ♂ (Illinois Natural History Survey), Clear Creek, 2.5 miles N Fayetteville, Washington Co., Arkansas Allocapnia sandersoni: Ross & Ricker, 1971:40. Material examined. Arkansas: Searcy Co., Little Red River, Hwy 65, 4 January 1997, B. Stark, S. Tucker, 1♂, 2♀ (BPS). Male epiproct. Apical segment of upper limb ca. 286 μm long and armed on the apical ca. 202 μm with dense patch of wave-like spikes (Figs. 103-106); apical segment ca. 142 μm wide at base and slightly swollen to ca. 164 μm near base of armature; armed area gradually narrowed to a rounded tip. Basal segment of upper limb ca. 572 μm long and ca. 111 μm wide near midlength; basal segment bears a shallow, longitudinal groove extending to near base of apical segment. Greatest width of lower limb ca. 198 μm; marginal area near spoon lined with sparse row of long setae. Male tergal process. Prominent raised, narrowly divided process on abdominal tergum 8 (Figs. 106- 108). Process on tergum 8 ca. 214 μm wide and covered with scale-like structures; median notch of process ca. 36 μm wide.
description: Published as part of Stark, Bill P. & Kondratieff, Boris C., 2012, Epiproct And Dorsal Process Structure In The Allocapnia Forbesi Frison, A. Pygmaea (Burmeister), And A. Rickeri Frison Species Groups (Plecoptera: Capniidae), And Inclusion Of A. Minima (Newport) In A New Species Group, pp. 45-77 in Illiesia 8 (5) on page 72, DOI: 10.5281/zenodo.4760725
description: {"references": ["Ricker, W. E. 1952. Systematic studies in Plecoptera. Indiana University Publications, Science Series No. 18. Indiana University Press, Bloomington, Indiana. 200 pp.", "Ross, H. H. & W. E. Ricker. 1971. The classification, evolution, and dispersal of the winter stonefly genus Allocapnia. Illinois Biological Monographs 45: University of Illinois Press, Urbana, Illinois. 166 pp."]}
Rational extension and Jacobi-type {\boldmath{$X_m$}} solutions of a quantum nonlinear oscillator
Creators: name: Schulze-Halberg, Axel
name: Roy, Barnana
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We construct a rational extension of a recently studied nonlinear quantum oscillator model. Our extended model is shown to retain exact solvability, admitting a discrete spectrum and corresponding closed-form solutions that are expressed through Jacobi-type $X_m$ exceptional orthogonal polynomials.
description: To appear in Journal of Mathematical Physics
The graphene sheet versus the 2DEG: a relativistic Fano spin-filter via STM and AFM tips
Creators: name: Seridonio, A. C.
name: Siqueira, E. C.
name: Souza, F. M.
name: Machado, R. S.
name: Lyra, S. S.
name: Shelykh, I. A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We explore theoretically the density of states (LDOS) probed by an STM tip of 2D systems hosting an adatom and a subsurface impurity,both capacitively coupled to AFM tips and traversed by antiparallel magnetic fields. Two kinds of setups are analyzed, a monolayer of graphene and a two-dimensional electron gas (2DEG). The AFM tips set the impurity levels at the Fermi energy, where two contrasting behaviors emerge: the Fano factor for the graphene diverges, while in the 2DEG it approaches zero. As result, the spin-degeneracy of the LDOS is lifted exclusively in the graphene system, in particular for the asymmetric regime of Fano interference. The aftermath of this limit is a counterintuitive phenomenon, which consists of a dominant Fano factor due to the subsurface impurity even with a stronger STM-adatom coupling. Thus we find a full polarized conductance, achievable just by displacing vertically the position of the STM tip. To the best knowledge, our work is the first to propose the Fano effect as the mechanism to filter spins in graphene. This feature arises from the massless Dirac electrons within the band structure and allows us to employ the graphene host as a relativistic Fano spin-filter.
Coupling Metric-Affine Gravity to a Higgs-Like Scalar Field
Creators: name: Rigouzzo, Claire
name: Zell, Sebastian
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: General Relativity (GR) exists in different formulations. They are equivalent in pure gravity but generically lead to distinct predictions once matter is included. After a brief overview of various versions of GR, we focus on metric-affine gravity, which avoids any assumption about the vanishing of curvature, torsion or non-metricity. We use it to construct an action of a scalar field coupled non-minimally to gravity. It encompasses as special cases numerous previously studied models. Eliminating non-propagating degrees of freedom, we derive an equivalent theory in the metric formulation of GR. Finally, we give a brief outlook to implications for Higgs inflation.
description: 49 pages, 5 figures, 3 appendices; v2: minor improvements and references added; v3: simplified eqs. (3.15) and (3.16), matches published version (including Correction)
The current status of suicide and self-injury in eating disorders: a narrative review
Creators: name: Kostro, Katrina
name: Lerman, Jessica
name: Attia, Evelyn
Publisher: name: Columbia University
Year: 2014
Subjects: subject: Suicide
subject: Eating disorders
subject: Psychology
subject: FOS: Psychology

description: The aim of this paper is to review recent literature on suicide and self-injury in eating disorders (ED) including anorexia nervosa (AN), bulimia nervosa (BN), and binge eating disorder (BED). Among psychiatric diagnoses, EDs are associated with increased mortality rates, even when specialized treatment is available. Of the mortalities that are reported in individuals with EDs, suicide is among the most commonly reported causes of death. Additionally, suicidal and non-suicidal self-injurious behaviors occur frequently in this clinical population. A literature search was undertaken using the databases of Medline/PubMed and PsycInfo to identify papers describing suicidality in individuals with ED diagnoses. The authors identified studies and review articles published between 2005-2013 (inclusive) that describe the relationship between EDs and suicide, and associated behaviors including self-injurious behaviors, or non-suicidal self-injury (NSSI). The initial search resulted in 1095 papers that met the a priori search criteria. After careful review, 66 papers were included. The majority of papers described clinical cohorts that were studied longitudinally. The diagnosis described most frequently in selected studies was AN. There are limited current data about the prevalence of suicide and NSSI among individuals with EDs. Among the published studies that focus specifically on the relationship between EDs and suicidality, most describe AN in more detail than other EDs. Nonetheless, rates of mortality, and specifically rates of suicide, are undeniably high in ED populations, as are the rates of self-harm. Therefore, it is critical for clinicians and caretakers to carefully evaluate these patients for suicide risk and to refer promptly for appropriate treatment.
Dendritic tree extraction from noisy maximum intensity projection images in C. elegans
Creators: name: Greenblum, Ayala
name: Sznitman, Raphael
name: Fua, Pascal
name: Arratia, Paulo
name: Oren, Meital
name: Podbilewicz, Benjamin
name: Sznitman, Josué
Publisher: name: Columbia University
Year: 2014
Subjects: Caenorhabditis elegans
Trees--Morphology
Biometry

description: Background: Maximum Intensity Projections (MIP) of neuronal dendritic trees obtained from confocal microscopy are frequently used to study the relationship between tree morphology and mechanosensory function in the model organism C. elegans. Extracting dendritic trees from noisy images remains however a strenuous process that has traditionally relied on manual approaches. Here, we focus on automated and reliable 2D segmentations of dendritic trees following a statistical learning framework. Methods: Our dendritic tree extraction (DTE) method uses small amounts of labelled training data on MIPs to learn noise models of texture-based features from the responses of tree structures and image background. Our strategy lies in evaluating statistical models of noise that account for both the variability generated from the imaging process and from the aggregation of information in the MIP images. These noisy models are then used within a probabilistic, or Bayesian framework to provide a coarse 2D dendritic tree segmentation. Finally, some post-processing is applied to refine the segmentations and provide skeletonized trees using a morphological thinning process. Results: Following a Leave-One-Out Cross Validation (LOOCV) method for an MIP database with available “ground truth” images, we demonstrate that our approach provides significant improvements in tree-structure segmentations over traditional intensity-based methods. Improvements for MIPs under various imaging conditions are both qualitative and quantitative, as measured from Receiver Operator Characteristic (ROC) curves and the yield and error rates in the final segmentations. In a final step, we demonstrate our DTE approach on previously unseen MIP samples including the extraction of skeletonized structures, and compare our method to a state-of-the art dendritic tree tracing software. Conclusions: Overall, our DTE method allows for robust dendritic tree segmentations in noisy MIPs, outperforming traditional intensity-based methods. Such approach provides a useable segmentation framework, ultimately delivering a speed-up for dendritic tree identification on the user end and a reliable first step towards further morphological characterizations of tree arborization.
British Columbia Legislative Assembly sessional clipping book (1921-04)
Creators: name: :Unav
Publisher: name: University of Victoria Libraries
Year: 2022
Subjects: subject: Politics and government
valueUri: http://id.worldcat.org/fast/1919741
subject: Law
valueUri: http://id.worldcat.org/fast/993678
subject: FOS: Law
subject: British Columbia. Legislative Assembly
valueUri: http://id.worldcat.org/fast/600765

description: These Sessional Clippings books cover the period 1891 to 1972, and include newspaper accounts written by various legislative reporters who covered debates occurring in the British Columbia Legislative Assembly. Transcripts of debates of the Legislative Assembly (Hansard) were not published in B.C. until 1970; hence these "Sessional Clipping Books" augment the "Journals", the record of daily proceedings of the Legislative Assembly. Selected clippings from various newspapers including the Vancouver Sun, the Vancouver Province, the Colonist, and the Times newspapers, relating to the newspaper reports concerning activities of the Legislature. The original sessional clippings books comprise 351 ledger size print volumes, held at the Legislative Library in Victoria BC. The print volumes were microfilmed onto 26 reels in 1977 under a Tri University Libraries (TRIUL) project by Precision Micrographic Services (Vancouver, B.C.), with the permission of the Legislative Library, Victoria, British Columbia. This digital collection was created by scanning the 26 microfilm reels.
The SAGE Handbook of Governance: Contracting Out
Creators: name: Cohen, Steven Alan
name: Eimicke, William B.
Publisher: name: Columbia University
Year: 2010
Subjects: Public contracts
Contracting out--Management
Privatization
Public policy (Law)
Management

description: The formal definition of a contract is simple: ‘An agreement between two or more parties, especially one that is written and enforceable by law’ (http://Answers.com, 2004). A contract specifies the good or service being procured, and typically includes information about price, schedule, and the definition and amount of the service or product being delivered. While the definition of a contract might be quite simple, as Phillip Cooper notes: ‘great latitude is left to the contracting parties to an agreement to have the tools to fashion and implement it. Negotiations resulting in a meeting of minds are the dominant dynamic in most contracting’ (2003: 13). This chapter focuses on contracts between government and non-governmental entities and the role of the government contract manager. Government contracting has expanded substantially over the past three decades and has taken on ideological baggage, often associated with shrinking the size of government, lower pay, job losses, and outsourcing of jobs to other countries. At the same time, government has been a major purchaser of goods and services in the marketplace for hundreds of years, buying everything from weapons, uniforms, airplanes, and ships to paper, soap, light bulbs, and paper clips.
The U.S. Cash Grain Trade: Participants, Transactions, and Information Sources, 1974
Creators: name: Heifner, Richard G.
name: Driscoll, James L.
name: Helmuth, John W.
name: Leath, Mack N.
name: Niernberger, Floyd F.
name: Wright, Bruce H
name: Heifner, Richard G.
name: Driscoll, James L.
name: Helmuth, John W.
name: Leath, Mack N.
name: Niernberger, Floyd F.
name: Wright, Bruce H
Publisher: name: Unknown
Year: 1977
Subjects: subject: Crop Production/Industries
subject: Demand and Price Analysis
subject: Marketing
subject: FOS: Economics and business
subject: Grain market news
subject: grain pricing
subject: cash grain trade

description: The commercial cash grain market in the United States is dispersed; most sales are made to buyers located away from the traditional terminals. The market primarily involves contracts for deferred delivery entered verbally by telephone and followed by written confirmation. The typical country elevator sells to only a few buyers. It relies upon telephone contact with them along with radio and teletype reports of futures prices, as sources of information for pricing decisions. Much of the basic information needed by traders is assembled in USDA's Grain Market News and distributed to users through commercial commodity news services.
The Use of the Internet in Government Service Delivery
Creators: name: Cohen, Steven Alan
name: Eimicke, William B.
Publisher: name: Columbia University
Year: 2001
Subjects: Public administration
Internet communication
Internet in public administration
Public policy (Law)
Information technology

description: Governments have begun to use the World Wide Web to assist in service delivery. This includes, but goes far beyond, the dissemination of information to the general public and involves a variety of other governmental functions. In reviewing some government websites it is clear that the use of the web for service delivery is still in its infancy. The types of services that can be delivered through the web are still in the process of being imagined and organized by both government and the private sector. Over the next decade we can expect to see a great deal of experimentation and organizational learn- ing in this area. The purpose of this report is to accelerate this learning process by studying several noteworthy current government efforts to use the web for interactive functions. The methodology of this study is to select a number of illustrative case studies on the use of e-commerce and the Internet in government service delivery and communications. The study includes a content analysis of selected state, local, and federal government websites and, where available, an analysis of the costs and benefits of switching to web-based service delivery. We selected cases in Alaska, the U.S. Internal Revenue Service, the city of Boston, Florida, Indiana, and Texas. We discuss the lessons learned from these cases and their broader implications for government service delivery. Then we provide a checklist of the steps that governments should take when using the Internet to deliver government service. Finally, we present background on the websites we reviewed, discuss the development and implementation of the site, and analyze its costs and benefits.
Trends in 20th Century United States Government Ethics
Creators: name: Cohen, Steven Alan
name: Eimicke, William B.
Publisher: name: Columbia University
Year: 1998
Subjects: Public administration--Moral and ethical aspects
Public administration
Public policy (Law)
Ethics

description: As the twentieth century comes to a close, ethics is returning to the public sector reform agenda. Just as it was at the turn of this century the current focus is on the administrative branch of government. Then, as now, scandals involving elected officials prompted the reform initiatives. However, today there is far less consensus on the most appropriate elements of the reform agenda, perhaps reflecting a century of less than successful ethically-driven reforms.
Echimys saturnus Thomas 1928
Creators: name: Honacki, James H.
name: Kinman, Kenneth E.
name: Koeppl, James W.
Publisher: name: Zenodo
Year: 1982
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Rodentia
Echimyidae
Echimys
Echimys saturnus

description: Echimys saturnus Thomas, 1928. Ann. Mag. Nat. Hist., ser. 10, 2:409. TYPE LOCALITY: Ecuador, Napo-Pastaza Prov., Rio Napo. DISTRIBUTION: Ecuador, east of the Andes. ISIS NUMBER: 5301410029005009001.
description: Published as part of James H. Honacki, Kenneth E. Kinman & James W. Koeppl, 1982, Order Rodentia (Part 6), pp. 560-594 in Mammal Species of the World (1 st Edition), Lawrence, Kansas, USA :Alien Press, Inc. & The Association of Systematics Collections on page 587, DOI: 10.5281/zenodo.7353039
Interacting Viscous Dark Energy in Bianchi Type-I Universe
Creators: name: Amirhashchi, Hassan
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: A solution to the coincidence and Big Rip problems on the bases of an anisotropic space-time is proposed. To do so, we study the interaction between viscous dark energy and dark matter in the scope of the Bianchi type-I Universe. We parameterize the viscosity and the interaction between the two fluids by constants $ζ_{0}$ and $σ$ respectively. A detailed investigation on the cosmological implications of this parametrization has been made. We have also performed a geometrical diagnostic by using the statefinder pairs $\{s, r\}$ and $\{q, r\}$ in order to differentiate between different dark energy models. Moreover, we fit the coupling parameter $σ$ as well as the Hubble's parameter $H_{0}$ of our model by minimizing the $χ^{2}$ through the age differential method, involving a direct measurement of $H$.
description: 12 pages, 9 figures, 2 tables
An improved bound for regular decompositions of $3$-uniform hypergraphs of bounded $VC_2$-dimension
Creators: name: Terry, C.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Combinatorics (math.CO)
subject: Logic (math.LO)
subject: FOS: Mathematics

description: A regular partition $\mathcal{P}$ for a $3$-uniform hypergraph $H=(V,E)$ consists of a partition $V=V_1\cup \ldots \cup V_t$ and for each $ij\in {[t]\choose 2}$, a partition $K_2[V_i,V_j]=P_{ij}^1\cup \ldots \cup P_{ij}^{\ell}$, such that certain quasirandomness properties hold. The complexity of $\mathcal{P}$ is the pair $(t,\ell)$. In this paper we show that if a $3$-uniform hypergraph $H$ has $VC_2$-dimension at most $k$, then there is a regular partition $\mathcal{P}$ for $H$ of complexity $(t,\ell)$, where $\ell$ is bounded by a polynomial in the degree of regularity. This is a vast improvement on the bound arising from the proof of this regularity lemma in general, in which the bound generated for $\ell$ is of Wowzer type. This can be seen as a higher arity analogue of the efficient regularity lemmas for graphs and hypergraphs of bounded VC-dimension due to Alon-Fischer-Newman, Lovász-Szegedy, and Fox-Pach-Suk.
Isomonodromic tau-functions from Liouville conformal blocks
Creators: name: Iorgov, N.
name: Lisovyy, O.
name: Teschner, J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The goal of this note is to show that the Riemann-Hilbert problem to find multivalued analytic functions with $SL(2,\mathbb{C})$-valued monodromy on Riemann surfaces of genus zero with $n$ punctures can be solved by taking suitable linear combinations of the conformal blocks of Liouville theory at $c=1$. This implies a similar representation for the isomonodromic tau-function. In the case $n=4$ we thereby get a proof of the relation between tau-functions and conformal blocks discovered in \cite{GIL}. We briefly discuss a possible application of our results to the study of relations between certain $\mathcal{N}=2$ supersymmetric gauge theories and conformal field theory.
description: 29 pages, 4 figures; v2: minor changes, added refs
Another brick in understanding chemical and kinematical properties of BSSs: NGC 6752
Creators: name: Lovisi, L.
name: Mucciarelli, A.
name: Dalessandro, E.
name: Ferraro, F. R.
name: Lanzoni, B.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We used high-resolution spectra acquired with the multifiber facility FLAMES at the Very Large Telescope of the European Southern Observatory to investigate the chemical and kinematical properties of a sample of 22 Blue Straggler Stars (BSSs) and 26 red giant branch stars in the nearby globular cluster NGC 6752. We measured radial and rotational velocities and Fe, O and C abundances. According to radial velocities, metallicity and proper motions we identified 18 BSSs as likely cluster members. We found that all the BSSs rotate slowly (less than 40 km/s), similar to the findings in 47 Tucanae, NGC 6397 and M30. The Fe abundance analysis reveals the presence of 3 BSSs affected by radiative levitation (showing [Fe/H] significantly higher than that measured in "normal" cluster stars), confirming that element transport mechanisms occur in the photosphere of BSSs hotter than 8000 K. Finally, BSS C and O abundances are consistent with those measured in dwarf stars. No C and O depletion ascribable to mass transfer processes has been found on the atmospheres of the studied BSSs (at odds with previous results for 47 Tucanae and M30), suggesting the collisional origin for BSSs in NGC 6752 or that the CO-depletion is a transient phenomenon.
description: ApJ accepted
Franz Volhard lecture: should doctors still measure blood pressure? The missing patients with masked hypertension
Creators: name: Pickering, Thomas G.
name: Gerin, William
name: Schwartz, Joseph E.
name: Spruill, Tanya M.
name: Davidson, Karina W.
Publisher: name: Columbia University
Year: 2008
Subjects: Hypertension
Ambulatory blood pressure monitoring
Blood pressure--Measurement
Public health
Medical sciences

description: The traditional reliance on blood pressure (BP) measurement in the medical setting misses a significant number of individuals with masked hypertension, who have normal clinic BP but persistently high daytime BP when measured out of the office. We suggest that masked hypertension may be a precursor of clinically recognized sustained hypertension and is associated with increased cardiovascular risk compared with consistent normotension. We discuss factors that may contribute to clinic–daytime BP differences as well as the changing relationship between these two measures over time. Anxiety at the time of BP measurement and having been diagnosed as hypertensive appear to be two possible mechanisms. The identification of individuals with masked hypertension is of great clinical importance and requires out-of-office BP screening. Ambulatory BP monitoring is the best established technique for doing this, but home monitoring may be applicable in the future.