cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Proactive Libraries: Enforcing Correct Behaviors in Android Apps
Creators: name: Riganelli, Oliviero
name: Fagadau, Ionut Daniel
name: Micucci, Daniela
name: Mariani, Leonardo
Publisher: name: arXiv
Year: 2022
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: The Android framework provides a rich set of APIs that can be exploited by developers to build their apps. However, the rapid evolution of these APIs jointly with the specific characteristics of the lifecycle of the Android components challenge developers, who may release apps that use APIs incorrectly. In this demo, we present Proactive Libraries, a tool that can be used to decorate regular libraries with the capability of proactively detecting and healing API misuses at runtime. Proactive Libraries blend libraries with multiple proactive modules that collect data, check the compliance of API usages with correctness policies, and heal executions as soon as the possible violation of a policy is detected. The results of our evaluation with 27 possible API misuses show the effectiveness of Proactive Libraries in correcting API misuses with negligible runtime overhead.
description: Accepted for publication in the Proceedings of the 44th International Conference on Software Engineering (ICSE 2022). arXiv admin note: substantial text overlap with arXiv:1911.09357, arXiv:1703.08005
An introduction to entanglement measures
Creators: name: Plenio, Martin B.
name: Virmani, S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We review the theory of entanglement measures, concentrating mostly on the finite dimensional two-party case. Topics covered include: single-copy and asymptotic entanglement manipulation; the entanglement of formation; the entanglement cost; the distillable entanglement; the relative entropic measures; the squashed entanglement; log-negativity; the robustness monotones; the greatest cross-norm; uniqueness and extremality theorems. Infinite dimensional systems and multi-party settings will be discussed briefly.
description: 25 pages, 6 figs, aps format. V2 greatly enhanced
Exceptional points and enhanced sensitivity in PT-symmetric continuous elastic media
Creators: name: Rosa, M. I. N.
name: Mazzotti, M.
name: Ruzzene, M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: We investigate non-Hermitian degeneracies, also known as exceptional points, in continous elastic media, and their potential application to the detection of mass and stiffness perturbations. Degenerate states are induced by enforcing parity-time symmetry through tailored balanced gain and loss, introduced in the form of complex stiffnesses and may be implemented through piezoelectric transducers. Breaking of this symmetry caused by external perturbations leads to a splitting of the eigenvalues, which is explored as a sentitive approach to detection of such perturbations. Numerical simulations on one-dimensional waveguides illustrate the presence of several exceptional points in their vibrational spectrum, and conceptually demonstrate their sensitivity to point mass inclusions. Second order exceptional points are shown to exhibit a frequency shift in the spectrum with a square root dependence on the perturbed mass, which is confirmed by a perturbation approach and by frequency response predictions. Elastic domains supporting guided waves are then investigated, where exceptional points are formed by the hybridization of Lamb wave modes. After illustrating a similar sensitivity to point mass inclusions, we also show how these concepts can be applied to surface wave modes for sensing crack-type defects. The presented results describe fundamental vibrational properties of PT-symmetric elastic media supporting exceptional points, whose sensitivity to perturbations goes beyond the linear dependency commonly encountered in Hermitian systems. The findings are thus promising for applications involving sensing of perturbations such as added masses, stiffness discontinuities and surface cracks.
Weak Convergence of the Scaled Median of Independent Brownian Motions
Creators: name: Swanson, Jason
Publisher: name: arXiv
Year: 2005
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60F17 (Primary) 60G15, 60J65, 60K35 (Secondary)

description: We consider the median of n independent Brownian motions, and show that this process, when properly scaled, converges weakly to a centered Gaussian process. The chief difficulty is establishing tightness, which is proved through direct estimates on the increments of the median process. An explicit formula is given for the covariance function of the limit process. The limit process is also shown to be Holder continuous with exponent gamma for all gamma < 1/4.
description: to appear in Probability Theory and Related Fields
Many-body perturbation theory using the density-functional concept: beyond the GW approximation
Creators: name: Bruneval, Fabien
name: Sottile, Francesco
name: Olevano, Valerio
name: Del Sole, Rodolfo
name: Reining, Lucia
Publisher: name: arXiv
Year: 2005
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We propose an alternative formulation of Many-Body Perturbation Theory that uses the density-functional concept. Instead of the usual four-point integral equation for the polarizability, we obtain a two-point one, that leads to excellent optical absorption and energy loss spectra. The corresponding three-point vertex function and self-energy are then simply calculated via an integration, for any level of approximation. Moreover, we show the direct impact of this formulation on the time-dependent density-functional theory. Numerical results for the band gap of bulk silicon and solid argon illustrate corrections beyond the GW approximation for the self-energy.
description: 4 pages, in press on Phys. Rev. Lett
Deux versions Melchites partielles de la Bible du IX et du X siècles
Creators: name: Naṣrallāh, Yūsuf
Publisher: name: Oriens christianus : Hefte für die Kunde des christlichen Orients
Year: 2024

description: Oriens christianus : Hefte für die Kunde des christlichen Orients, Bd. 64 (1980): Oriens christianus, Band 64
Astrophysical water masers: Line profiles analysis
Creators: name: Vlemmings, W. H. T.
name: van Langevelde, H. J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The changes in the spectral line profile of the 22GHz H2O maser are calculated as a function of emerging maser flux. We address not only the narrowing and re-broadening of the maser lines, but also the deviations of Gaussian symmetry as a result of the various hyperfine components of the 22 GHz maser line. Non-LTE models of the H2O maser transition, including hyperfine structure and cross-relaxation, are compared with high spectral resolution Very Long Baseline Interferometry (VLBI) observations of the H2O masers in the circumstellar envelopes (CSEs) of a sample of late-type stars. This yields estimates on the thermal width in the maser region as well as the emerging maser flux and thus the level of saturation. We also discuss the effect of a velocity gradient along the maser path on the line widths and shapes of the line profile and the effect of the geometry of the maser region. We find that the typical velocity shift along the maser path is of the order of 1.0 km/s. The effect of this shift on the shape of the maser spectrum is difficult to distinguish from the effect of the hyperfine components.
description: 8 pages; 6 figures. Accepted for publication in A&A
Ochterus brunneus Hungerford 1927
Creators: name: Kment, Petr
name: Carapezza, Attilio
name: Jindra, Zdeněk
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Ochteridae
Ochterus
Ochterus brunneus

description: Ochterus brunneus Hungerford, 1927
 Ochterus brunneus Hungerford, 1927: 188 –189 (description, differential diagnosis). SYNTYPES: 2, Bolivia: ‘Huachi Rio Beni’ (USNM).
 Ochterus brunneus: SCHELL (1943a): 32, 35 (key to species, illustration), SCHELL (1943b): 41 (original description repeated, differential diagnosis); DRAKE (1952): 74 (checklist); HECKMAN (2011): 461 (key to species, illustration).
 (1 1 ♀ MMBC, 1 NMPC); NE,Ankarafantsika N.P., 22.–24.iv.2011, ca. 100 m a.s.l., sweeping close to main entrance, 1, P. Baňař lgt., P. Kment det. (MMBC). MOZAMBIQUE: CW, 30 km NE Guro, 17°14′S 33°27′E, 620 m a.s.l., 11.xii.2005, 1 1 ♀, J. Halada lgt., P. Kment det. (MMBC).  SOUTH SUDAN: UPPER NILE:  near Malakal, 5.–20.i. 1963, 1 1 ♀, R. E. Linnavuori lgt., P. Kment det. (ACPI). SUDAN: BLUE NILE: Blue Nile Prov., Ed Damazin [= Ad-Damazin], 2.xii.1967, 1 5 ♀♀ (Fig. 19), P. Štys lgt. (1169), P. Kment det. (1 4 ♀♀ MMBC, 1 ♀ NMPC). SENNAR: Blue Nile prov., Dinder Game Reserve, Galegu, 28.ii.1967, 4 4 ♀♀, P. Štys lgt. (653), P. Kment det. (3 3 ♀♀ MMBC, 1 1 ♀ NMPC); same locality, 4.iii.1967, 4 6 ♀♀, P. Štys lgt. (686), P. Štys det. as O. marginatus caffer, P. Kment revid. (3 5 ♀♀ MMBC, 1 1 ♀ NMPC).
  Distribution. Afrotropical Region:  Benin (KORMILEV 1973); Burkina Faso (LINNAVUORI 1981); Cameroon (POISSON 1948); Cape Verde Islands: Santiago Island (MANCINI 1939a); Central African Republic (LINNAVUORI 1981); Chad (LINNAVUORI 1981); Democratic Republic of the Congo (POISSON 1949, 1968b; POISSON & SALLIER DUPIN 1969); Ethiopia (DE CARLINI 1895, MANCINI 1956); Gambia (NIESER & CHEN 1992); Guinea (POISSON 1954, BERTRAND 1962); Ivory Coast (POISSON 1968a); Kenya (JACZEWSKI 1934); Madagascar (POLHEMUS & POLHEMUS 2008); Mozambique (new record); Nigeria (JACZEWSKI 1934, LINNAVUORI 1981); Republic of the Congo (BERTRAND 1962); São Tomé and Príncipe: Príncipe Island (MANCINI 1939a); Senegal (NIESER & CHEN 1992); Sierra Leone (JACZEWSKI 1934); Somalia (MANCINI 1939a,b; LINNAVUORI 1982); South Africa (STÅL 1855, JACZEWSKI 1934, KORMILEV 1973); South Sudan (LINNAVUORI 1971, 1980); Sudan (new record); Tanzania (JACZEWSKI 1934).
description: Published as part of Kment, Petr, Carapezza, Attilio & Jindra, Zdeněk, 2020, Taxonomic catalogue of the family Ochteridae with description of Ochterus papaceki sp. nov. from Socotra Island and Tanzania (Hemiptera: Heteroptera), pp. 23-64 in Acta Entomologica Musei Nationalis Pragae 60 (1) on pages 36-37, DOI: 10.37520/aemnp.2020.003, http://zenodo.org/record/3879659
On the Origin of the Absorption Features in SS433
Creators: name: Barnes, A. D.
name: Casares, J.
name: Charles, P. A.
name: Clark, J. S.
name: Cornelisse, R.
name: Knigge, C.
name: Steeghs, D.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present high-resolution optical spectroscopy of the X-ray binary system SS433, obtained over a wide range of orbital phases. The spectra display numerous weak absorption features, and include the clearest example seen to date of those features, resembling a mid-A type supergiant spectrum, that have previously been associated with the mass donor star. However, the new data preclude the hypothesis that these features originate solely within the photosphere of the putative mass donor, indicating that there may be more than one region within the system producing an A supergiant-like spectrum, probably an accretion disc wind. Indeed, whilst we cannot confirm the possibility that the companion star is visible at certain phase combinations, it is possible that all supergiant-like features observed thus far are produced solely in a wind. We conclude that great care must be taken when interpreting the behaviour of these weak features.
description: Accepted for publication in MNRAS, 8 pages, 6 figures
A Comprehensive Review of Skeleton-based Movement Assessment Methods
Creators: name: Hakim, Tal
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: The raising availability of 3D cameras and dramatic improvement of computer vision algorithms in the recent decade, accelerated the research of automatic movement assessment solutions. Such solutions can be implemented at home, using affordable equipment and dedicated software. In this paper, we divide the movement assessment task into secondary tasks and explain why they are needed and how they can be addressed. We review the recent solutions for automatic movement assessment from skeleton videos, comparing them by their objectives, features, movement domains and algorithmic approaches. In addition, we discuss the status of the research on this topic in a high level.
Evolving Stochastic Learning Algorithm Based on Tsallis Entropic Index
Creators: name: Anastasiadis, Aristoklis D.
name: Magoulas, George D.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: In this paper, inspired from our previous algorithm, which was based on the theory of Tsallis statistical mechanics, we develop a new evolving stochastic learning algorithm for neural networks. The new algorithm combines deterministic and stochastic search steps by employing a different adaptive stepsize for each network weight, and applies a form of noise that is characterized by the nonextensive entropic index q, regulated by a weight decay term. The behavior of the learning algorithm can be made more stochastic or deterministic depending on the trade off between the temperature T and the q values. This is achieved by introducing a formula that defines a time--dependent relationship between these two important learning parameters. Our experimental study verifies that there are indeed improvements in the convergence speed of this new evolving stochastic learning algorithm, which makes learning faster than using the original Hybrid Learning Scheme (HLS). In addition, experiments are conducted to explore the influence of the entropic index q and temperature T on the convergence speed and stability of the proposed method.
description: 12 pages, 11 figures, journal
Generalized mirror matter models
Creators: name: Foot, R.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Non-minimal gauge models with exact unbroken improper space-time symmetries are constructed and their cosmological and astrophysical implications explored.
description: about 5 pages
Effects of mismatched transmissions on two-mode squeezing and EPR correlations with a slow light medium
Creators: name: Thanvanthri, Sulakshana
name: Wen, Jianming
name: Rubin, Morton H.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We theoretically discuss the preservation of squeezing and continuous variable entanglement of two mode squeezed light when the two modes are subjected to unequal transmission. One of the modes is transmitted through a slow light medium while the other is sent through an optical fiber of unit transmission. Balanced homodyne detection is used to check the presence of squeezing. It is found that loss of squeezing occurs when the mismatch in the transmission of the two modes is greater than 40% while near ideal squeezing is preserved when the transmissions are equal. We also discuss the effect of this loss on continuous variable entanglement using strong and weak EPR criteria and possible applications for this experimental scheme.
description: 7 pages, 4 figures
Cubic planar graphs that cannot be drawn on few lines
Creators: name: Eppstein, David
Publisher: name: Journal of Computational Geometry
Year: 2021

description: For every integer $\ell$, we construct a cubic 3-vertex-connected planar bipartite graph $G$ with $O(\ell^3)$ vertices such that there is no planar straight-line drawing of $G$ whose vertices all lie on $\ell$ lines. This strengthens previous results on graphs that cannot be drawn on few lines, which constructed significantly larger maximal planar graphs. We also find apex-trees and cubic bipartite series-parallel graphs that cannot be drawn on a bounded number of lines.
description: Journal of Computational Geometry, Vol. 12 No. 1 (2021)
Continual Representation Learning for Biometric Identification
Creators: name: Zhao, Bo
name: Tang, Shixiang
name: Chen, Dapeng
name: Bilen, Hakan
name: Zhao, Rui
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: With the explosion of digital data in recent years, continuously learning new tasks from a stream of data without forgetting previously acquired knowledge has become increasingly important. In this paper, we propose a new continual learning (CL) setting, namely ``continual representation learning'', which focuses on learning better representation in a continuous way. We also provide two large-scale multi-step benchmarks for biometric identification, where the visual appearance of different classes are highly relevant. In contrast to requiring the model to recognize more learned classes, we aim to learn feature representation that can be better generalized to not only previously unseen images but also unseen classes/identities. For the new setting, we propose a novel approach that performs the knowledge distillation over a large number of identities by applying the neighbourhood selection and consistency relaxation strategies to improve scalability and flexibility of the continual learning model. We demonstrate that existing CL methods can improve the representation in the new setting, and our method achieves better results than the competitors.
ADJUSTMENTS IN A BEEF/SHEEP FARM IN RESPONSE TO THE CATTLE CYCLE: THE POTENTIAL FOR INCREASED AND MORE STABLE INCOME
Creators: name: Burton, Robert O.
name: Wollo, J. Wesseh
name: Burton, Robert O.
name: Wollo, J. Wesseh
Publisher: name: Unknown
Year: 1986
Subjects: Livestock Production/Industries

description: A dynamic (multi-period) linear programming model of a beef/sheep farm was used to evaluate the potential for increasing income and for maintaining a specified level of annual income during a cattle cycle. Results indicate that both objectives may be accomplished by adjusting animal numbers in response to changing price ratios: a higher proportion of cows should be kept during the accumulation phase of the cattle cycle, and a higher proportion of ewes should be kept during the liquidation phase.
THE ECONOMIC IMPACT OF BGH ON THE NEW YORK STATE DAIRY SECTOR: COMPARATIVE STATIC RESULTS
Creators: name: Magrath, William B.
name: Tauer, Loren W.
name: Magrath, William B.
name: Tauer, Loren W.
Publisher: name: Unknown
Year: 1986
Subjects: Livestock Production/Industries

description: The price and quantity effects of a forthcoming biotechnology product, bovine growth hormone (bGH), are explored in a simple partial equilibrium model. The model is based on previous theoretical work on technological change but is developed in terms of a sector output. A particular output curve is estimated using data from a random sample of New York State dairy farms. Information on the farm level production effects of bGH is used to shift the output curve and to solve for equilibrium levels of price and output. The model projects the bGH may lead to the exit of 5,400 New York dairy farms and a 20 percent reduction in herd size. Consumers will benefit from an approximately 30 percent drop in milk price. The effect on gradual diffusion of bGH on farm numbers if considered. To accommodate this technology policies encouraging an orderly transfer of resources out of the dairy sector should be examined.
AN ASSESSMENT OF THE NJARE
Creators: name: Broder, Josef M.
name: Broder, Josef M.
Publisher: name: Unknown
Year: 1986
Subjects: Teaching/Communication/Extension/Profession

description: Assessments of the NJARE and other agricultural economic journals by faculty in the Northeast Region were contrasted to those made by faculty in other regions. Faculty in the Northeast judged the NJARE to be of high professional quality and personal usefulness and felt that the NJARE had made substantial quality improvements. A strong regional character in the NJARE was evidenced by low journal participation rates by faculty in other regions. Impacts of recent changes in the Journal and the need for future assessments were discussed.
A HOUSEHOLD PRODUCTION ANALYSIS OF FUELWOOD DEMAND IN RHODE ISLAND
Creators: name: MacKenzie, John
name: Weaver, Thomas F.
name: MacKenzie, John
name: Weaver, Thomas F.
Publisher: name: Unknown
Year: 1986
Subjects: Resource /Energy Economics and Policy

description: A model analyzing household substitution of fuelwood for other heating fuels is needed to clarify the relationship between energy prices and patterns of forest resource utilization. This paper employs the household production methodology to model fuelwood demand in Rhode Island. Data from a cross-sectional survey of 515 households are employed to test a discrete-choice model of household participation in wood-burning and a four-equation system modeling household production of heat and aesthetic benefits from fuelwood and stove capital. Control of selection bias via inclusion of an appropriate instrument allows analysis of aggregate demands. Some broad policy prescriptions applicable to the Northeast generally are presented.
DEMOGRAPHIC VERSUS MEDIA ADVERTISING EFFECTS ON MILK DEMAND: THE CASE OF THE NEW YORK CITY MARKET
Creators: name: Kinnucan, Henry W.
name: Kinnucan, Henry W.
Publisher: name: Unknown
Year: 1986
Subjects: subject: Livestock Production/Industries
subject: Marketing
subject: FOS: Economics and business

description: An advertising-sales response model is extended to include the effects of demographic factors (age and race) as additional determinants of milk demand. Previous research indicates that the age structure of a population and its racial composition are primary factors influencing fluid milk sales. Failure to incorporate these factors in the milk demand model results in a 30 percent downward biased estimate of the advertising effect. Consequently, the economic effectiveness of milk advertising is understated when the effects of demographic variables are ignored. Changes in demographic factors (growing nonwhite population and shrinking teenage market) appear to explain the relatively flat trend in per capita milk sales in the New York City market over the period 1971-80-a period in which dairy producers spent $12 million on generic advertising of milk. Net returns to Federal Order 2 dairy farmers from generic advertising of fluid milk is estimated to average $6.07 per media dollar invested over the 1972-79 period.
The magnetic field around late-type stars revealed by the circumstellar H2O masers
Creators: name: Vlemmings, W. H. T.
name: van Langevelde, H. J.
name: Diamond, P. J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Through polarization observations, circumstellar masers are excellent probes of the magnetic field in the envelopes of late-type stars. Whereas observations of the polarization of the SiO masers close to the star and on the OH masers much further out were fairly commonplace, observations of the magnetic field strength in the intermediate density and temperature region where the 22 GHz water masers occur have only recently become possible. Here we present the analysis of the circular polarization, due to Zeeman splitting, of the water masers around the Mira variable stars U Her and U Ori and the supergiant VX Sgr. We present an upper limit of the field around U Her that is lower but consistent with previous measurements, reflecting possible changes in the circumstellar envelope. The field strengths around U Ori and VX Sgr are shown to be of the order of several Gauss. Moreover, we show for the first time that large scale magnetic fields permeate the circumstellar envelopes of an evolved star; the polarization of the water masers around VX Sgr reveals a dipole field structure. We discuss the coupling of the magnetic field with the stellar outflow, as such fields could possibly be the cause of distinctly aspherical mass-loss.
description: 10 pages, 6 figures; accepted for publication in A&A; corrected typo in referenced magnetic field strength
Ḥabīb ibn Ḫidmah Abū Rā'iṭah, a Christian "mutakallim" of the first Abbasid century
Creators: name: Griffith, Sidney Harrison
Publisher: name: Oriens christianus : Hefte für die Kunde des christlichen Orients
Year: 2024

description: Oriens christianus : Hefte für die Kunde des christlichen Orients, Bd. 64 (1980): Oriens christianus, Band 64
A constant-factor approximation algorithm for vertex guarding a WV-polygon
Creators: name: Ashur, Stav
name: Filtser, Omrit
name: Katz, Matthew
Publisher: name: Journal of Computational Geometry
Year: 2021

description: The problem of vertex guarding a simple polygon was first studied by Subir K. Ghosh (1987), who presented a polynomial-time $O(\log n)$-approximation algorithm for placing as few guards as possible at vertices of a simple $n$-gon $P$, such that every point in $P$ is visible to at least one of the guards. Ghosh also conjectured that this problem admits a polynomial-time algorithm with constant approximation ratio. Due to the centrality of guarding problems in the field of computational geometry, much effort has been invested throughout the years in trying to resolve this conjecture. Despite some progress (surveyed below), the conjecture remains unresolved to date. In this paper, we confirm the conjecture for the important case of weakly visible polygons, by presenting a $(2+\eps)$-approximation algorithm for guarding such a polygon using vertex guards. A simple polygon $P$ is \emph{weakly visible} if it has an edge $e$, such that every point in $P$ is visible from some point on $e$. We also present a $(2+\eps)$-approximation algorithm for guarding a weakly visible polygon $P$, where guards may be placed anywhere on $P$'s boundary (except in the interior of the edge $e$). Finally, we present an $O(1)$-approximation algorithm for vertex guarding a polygon $P$ that is weakly visible from a chord. Our algorithms are based on an in-depth analysis of the geometric properties of the regions that remain unguarded after placing guards at the vertices to guard the polygon's boundary. Finally, our algorithms may become useful as part of the grand attempt of Bhattacharya et al. to prove the original conjecture, as their approach is based on partitioning the underlying simple polygon into a hierarchy of weakly visible polygons.
description: Journal of Computational Geometry, Vol. 12 No. 1 (2021)
Contextual interference : single-task versus multi-task learning and influence of concurrent temporal interference
Creators: name: Maslovat, Dana
Publisher: name: University of British Columbia
Year: 2009

description: Contextual interference (CI) is a learning effect whereby high interference practice conditions produce decreased acquisition performance yet increased retention and transfer performance. Thus, a more difficult practice environment, although initially detrimental to acquisition, actually benefits learning of the skill. Typical CI experimental paradigms involve the comparison of acquisition, retention and transfer performance of multiple tasks under a blocked acquisition schedule (low interference) versus a random acquisition schedule (high interference). Numerous studies have investigated contextual interference and it has been shown to be a stable, robust phenomenon. Two studies involving bimanual coordination were conducted to further examine the contextual interference effect. Experiment 1 involved comparison of acquisition, retention and transfer performance of a single task control group, two task blocked presentation group and a two-task random presentation group. Acquisition data showed both random and control groups outperformed the blocked group in performance of the coordination pattern. This was opposite to the expected CI effect and was attributed to the high number of acquisition trials providing enough time for the learning benefits of the interference to be realized. Retention data did show a typical CI effect for one dependent measure, with the random group significantly outperforming the blocked group. Neither two-task group significantly outperformed the control group, suggesting interference of a second task may be as beneficial to learning as extra practice on the initial task. No group effects were found during transfer performance, however there was a learning effect on the opposite, unpracticed coordination pattern. Experiment 2 examined an alternate form of interference, requiring participants to concurrently verbalize a compatible or incompatible counting pattern while performing a bimanual coordination pattern, to determine if CI effects could be generalized to other forms of interference. No significant group effects were found in acquisition, retention or transfer performance. This was attributed to insufficient interference caused by the counting patterns perhaps due to anchoring strategies of the participants. Analysis of the retention data did provide weak support for a concurrent 2-count pattern providing more interference than a concurrent 4-count pattern. However more research in the area of concurrent temporal interference is required to determine possible interference effects. Scanning data did show a significant improvement in performance of the to-be-learned task as well as the symmetrical bimanual coordination pattern, in support of previous studies. Examination of the sound data provided information regarding anchoring strategies of participants.
LEVEL OF STRUCTURAL AGGREGATION AND PREDICTIVE ACCURACY OF MILK SUPPLY RESPONSE ESTIMATES
Creators: name: Smith, Blair J.
name: Scott, Donald R.
name: Smith, Blair J.
name: Scott, Donald R.
Publisher: name: Unknown
Year: 1986
Subjects: Livestock Production/Industries

description: Milk supply response was estimated for Pennsylvania using three different levels of structural aggregation. The base level involved the estimation of milk production in a single equation. Under the second method, production was the product of two equations: milk per cow and number of milk cows. The third method factored production into three equations: milk per cow, number of dairy farms, and number of cows per farm. As expected, the greater the degree of disaggregation the more was learned about the structural aspects of milk production. At the same time, predictive accuracy generally decreased, but the differences among models was slight.
Bar Hebraeus, le "Dafʻ al-Hamm" et les "Contes amusants"
Creators: name: Samīr, Samīr Ḫalīl
Publisher: name: Oriens christianus : Hefte für die Kunde des christlichen Orients
Year: 2024

description: Oriens christianus : Hefte für die Kunde des christlichen Orients, Bd. 64 (1980): Oriens christianus, Band 64
AN ECONOMETRIC MODEL OF THE MARKET FOR FRESH NEW ENGLAND GROUNDFISH WITH EMPHASIS ON THE ROLE OF CANADIAN IMPORTS
Creators: name: Felixson, Tryggvi
name: Allen, P. Geoffrey
name: Storey, David A.
name: Felixson, Tryggvi
name: Allen, P. Geoffrey
name: Storey, David A.
Publisher: name: Unknown
Year: 1987
Subjects: International Relations/Trade

description: Most econometric studies of the groundfish sector have suggested that either imports are not sensitive to U.S. prices, or that domestic prices are not much affected by imports, or both. Using a six equation model of the domestic fresh groundfish market we obtained contrasting results. For example, a 5.82 percent tariff of the type proposed by the U.S. International Trade Commission in 1986 would, if it applied to both whole fish and fillets, lower imports of fresh fish 3.7 percent and raise domestic ex-vessel prices 2.6 percent in the long run. The main reasons for the different results appear to be our inclusion of exchange rate effects and a more accurate measure of total fresh imports.
A prospective survey assessing causative factors, outcome, and compliance with treatment in injured runners at the Allan McGavin Sports Medicine Centre
Creators: name: Johnston, Christopher Andrew McLean
Publisher: name: University of British Columbia
Year: 2009

description: The Allan McGavin Sports Medicine Centre has tracked the trends in running injuries over the past twenty years with three retrospective surveys. Associations of extrinsic and intrinsic factors with certain running injuries were also detailed. Outcome of running injuries and compliance with management has not been studied previously. The purpose of this thesis was to: 1. track the diagnoses of overuse running injuries and identify changing trends as compared to previous retrospective research conducted at the clinic over the past 20 years 2. assess causative factors related to overuse running injuries, and 3. assess the outcome of overuse running injuries and compliance with treatment by injured runners. The methodology involved three surveys generated specifically for this study. Injured runners completed one survey at their initial visit to the clinic detailing their injury and usual training program and a follow-up survey assessing their injury outcome and compliance with treatment. Physicians completed a survey at the initial visit detailing injury diagnosis, causes of injury, and suggested management plan. Over the course of the studies at the Allan McGavin Sports Medicine Centre, there has been an increase in the average age of patients as well as the female to male ratio. This likely can be attributed to the change in population demographics and increased female participation in running, respectively. Changes in injury location and specific diagnoses were described and reasons for the changes were identified. Errors in training were the most common contributing factors to running injury. Overall, intrinsic outnumbered extrinsic causes. This analysis reinforced the belief that running injuries are multi-factorial. The outcome analysis suggested that injury status was most likely to improve and least likely to reach pre-injury level or worsen. Cross training ability was more likely to improve and reach pre-injury level and least likely to worsen as compared to running ability. Correlation analysis of outcome measures with duration of symptoms, injury severity, follow-up interval, and overall compliance to the management plan provided further insight into their importance in running injuries. Opinions are offered on improving compliance as well as future approaches to compliance and running injury research.
SUPPLY RESPONSE IN THE NORTHEASTERN FRESH TOMATO MARKET
Creators: name: Lopez, Rigoberto A.
name: Munoz, Arnold O.
name: Lopez, Rigoberto A.
name: Munoz, Arnold O.
Publisher: name: Unknown
Year: 1987
Subjects: Demand and Price Analysis

description: This paper examines the forces that affected the Northeastern fresh tomato supply in the post-WWII period. A simultaneous equation model is developed which incorporates a composite price expectation model, supply response, and factors affecting regional price. Findings reveal that data are consistent with the Rational Expectation Hypothesis. Urban pressure played a major role in shifting supply response while shipments from competing areas had a modest impact on regional production or price. The positive elasticity of producers' revenue with respect to local production highlights the aggregate benefits of increasing yields.
SUPPLY GROWTH AND DAIRY INDUSTRY DEREGULATION
Creators: name: Chang, Ching-Cheng
name: Stefanou, Spiro E.
name: Chang, Ching-Cheng
name: Stefanou, Spiro E.
Publisher: name: Unknown
Year: 1987
Subjects: Demand and Price Analysis
Livestock Production/Industries

description: Optimal control models of aggregate milk supply and demand behavior are used to describe the optimal phasing of the deregulatory dairy price support in the presence of supply growth. Producers are assumed to face costs of adjustment, and are myopic with respect to price expectations and the adoption of the new quasi-fixed factor augmenting technology.
RISK AND SUSTAINABLE AGRICULTURE: A TARGET-MOTAD ANALYSIS OF THE 92-YEAR "OLD ROTATION"
Creators: name: Novak, James L.
name: Mitchell, Charles C.
name: Crews, Jerry R.
name: Novak, James L.
name: Mitchell, Charles C.
name: Crews, Jerry R.
Publisher: name: Unknown
Year: 1990
Subjects: Risk and Uncertainty

description: Target-MOTAD was used to assess the risks and returns of sustainable cotton crop rotations from Auburn University's 92-year "Old Rotation." Study results analyze rotations of continuous cotton, with and without winter legumes; two years of cotton-winter legumes-corn, with and without nitrogen fertilization; and three years of cotton-winter legumes-corn and rye-soybeans double-cropped. Ten years of observations on deviations from target income were used to identify optimal sustainable rotation(s). Study results suggest that diversification in rotations, as well as in crops, results in the least risk for a given level of target income.
Ochterus cheesmannae Baehr 1990
Creators: name: Kment, Petr
name: Carapezza, Attilio
name: Jindra, Zdeněk
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Ochteridae
Ochterus
Ochterus cheesmannae

description: Ochterus cheesmannae Baehr, 1990
 Ochterus cheesmannae Baehr, 1990b: 450, 453, 455–459, 461, 473 ‒474 (key to species, description, illustrations). HOLOTYPE:, Indonesia: West Papua: ʻN. Dutch New Guinea: Waigeu, Camp Nok., 2500 ft [= 762 m a.s.l.]’ (BMNH).
 Ochterus cheesmannae: CHEN et al. (2005): 413 (checklist).
  Distribution. Australian Region:  Indonesia: West Papua: Waigeo Island (BAEHR 1990b, CHEN et al. 2005)
description: Published as part of Kment, Petr, Carapezza, Attilio & Jindra, Zdeněk, 2020, Taxonomic catalogue of the family Ochteridae with description of Ochterus papaceki sp. nov. from Socotra Island and Tanzania (Hemiptera: Heteroptera), pp. 23-64 in Acta Entomologica Musei Nationalis Pragae 60 (1) on page 37, DOI: 10.37520/aemnp.2020.003, http://zenodo.org/record/3879659
THE EFFECTS OF CHANGES IN THE TAX STRUCTURE ON AGRICULTURAL ASSET REPLACEMENT
Creators: name: Smith, Vincent H.
name: Smith, Vincent H.
Publisher: name: Unknown
Year: 1990
Subjects: Agricultural and Food Policy

description: This paper uses a deterministic asset replacement model to examine the implications of the 1986 Tax Reform Act (TRA) for replacement investment in U.S. agriculture. The optimal replacement age for an asset is shown to be inversely related to the size of investment tax credits and the present value of depreciation allowances but generally directly related to marginal tax rate. Simulation results indicate that the net effects of the TRA vary across assets. Replacement ages for assets with relatively long depreciation lives (e.g., farm structures) tend to fall. Those for assets with relatively short depreciation lives rise (e.g., tractors).
PROBABILISTIC COST EFFECTIVENESS IN AGRICULTURAL NONPOINT POLLUTION CONTROL
Creators: name: McSweeny, William T.
name: Shortle, James S.
name: McSweeny, William T.
name: Shortle, James S.
Publisher: name: Unknown
Year: 1990
Subjects: Environmental Economics and Policy

description: Conceptual weaknesses in the use of costs of average abatement as a measure of the cost effectiveness of agricultural nonpoint pollution control are examined. A probabilistic alternative is developed. The focus is on methods for evaluating whole-farm pollution control plans rather than individual practices. As a consequence, the analysis is presented in a chance-constrained activity analysis framework because activity procedures are a practical and well developed device for screening farm planes. Reliability of control is shown to be as important as reduction targets in designing farm plans for pollution control. Furthermore, broad-axe prescriptions of technology in the form of Best Management Practices may perform poorly with respect to cost effectiveness.
A REGIONAL COMPARISON OF RISK-EFFICIENT SOYBEAN MARKETING STRATEGIES
Creators: name: McKinnell, Cathy S.
name: Kahl, Kandice H.
name: Curtis, Charles E.
name: McKinnell, Cathy S.
name: Kahl, Kandice H.
name: Curtis, Charles E.
Publisher: name: Unknown
Year: 1990
Subjects: subject: Marketing
subject: FOS: Economics and business

description: Risk-efficient portfolios from a subset of marketing strategies were identified using Target-MOTAD. Portfolios were generated for Illinois, Arkansas, and South Carolina to determine whether regional price and yield characteristics affected the optimal marketing strategy selection during 1972-1985. The results support previous conclusions that the risk borne when following a combination of marketing strategies was less than the risk of any single marketing strategy examined. The results also show that the marketing strategies representing efficient risk-return combinations for a producer in one region were different from the efficient risk-return combinations for a producer in another region. Therefore, generic marketing advice would have produced results less preferred in one region than in another.
Das christologische Florilegium in Qērellos II
Creators: name: Weischer, Bernd Manuel
Publisher: name: Oriens christianus : Hefte für die Kunde des christlichen Orients
Year: 2024

description: Oriens christianus : Hefte für die Kunde des christlichen Orients, Bd. 64 (1980): Oriens christianus, Band 64
ECONOMETRIC ANALYSIS OF FARMER PARTICIPATION IN THE DAIRY TERMINATION PROGRAM IN NORTH CAROLINA AND VIRGINIA
Creators: name: Gale, H. Frederick
name: Gale, H. Frederick
Publisher: name: Unknown
Year: 1990
Subjects: Farm Management

description: Farm-level data are used to estimate equations explaining the probability of bidding and the level of the bid for the 1986 Dairy Termination Program. Participation was attractive to older farmers, to those who were not planning to transfer the farm to a family member, to less experienced farmers, and to those using less sophisticated management techniques. Schooling, off-farm work, and nonfarm experience did not have significant effects. The participation pattern suggests that the long-term effects of the program on milk supply are small.
ENVIRONMENTAL HAZARDS OF FARMING: THINKING ABOUT THE MANAGEMENT CHALLENGE
Creators: name: Shabman, Leonard A.
name: Shabman, Leonard A.
Publisher: name: Unknown
Year: 1990
Subjects: Environmental Economics and Policy

description: What an economist argues about managing the hazards of new production technologies depends on that individual's beliefs about the scientific credibility of assessed risk of new technologies, about the meaning of voluntary risk and compensations, and about the meaning of "progress" and "nature." None of these beliefs is derived from the core of the economics discipline. Indeed, the economist's arguments often rest not on economic considerations, but on these matters of belief that are established outside the discipline.
DO FARMERS GET AN EQUAL BANG FOR THEIR BUCK FROM GENERIC ADVERTISING PROGRAMS? A THEROETICAL AND EMPIRICAL ANALYSIS
Creators: name: Chung, Chanjin
name: Kaiser, Harry M.
name: Chung, Chanjin
name: Kaiser, Harry M.
Publisher: name: Unknown
Year: 2000
Subjects: subject: Marketing
subject: FOS: Economics and business

description: This study presents a theoretical and empirical analysis of the distribution of generic advertising benefits across individual producers. We develop a closed-economy partial equilibrium model that allows for the presence of producer heterogeneity in supply response. Analytical results indicate that producers having less elastic supply response capture more benefits per dollar expended than producers with more elastic supply response. The extent of unequal distribution depends on parameters characterizing industries. The inequality may not be a significant problem for some industries, especially where the firm-level supply elasticities are not substantially different among producers, but it may be an important issue when industries have substantial differences in firm-level supply elasticities and firm sizes, and experience large demand shifts due to advertising programs
CAPTIVE SUPPLIES AND THE CASH MARKET PRICE: A SPATIAL MARKETS APPROACH
Creators: name: Zhang, Mingxia
name: Sexton, Richard J.
name: Zhang, Mingxia
name: Sexton, Richard J.
Publisher: name: Unknown
Year: 2000
Subjects: Agribusiness

description: Exclusive contracts (often called "captive supplies") between processors and farmers are in increasingly important feature of modern agriculture. We study an interesting empirical regulatory occurring in markets that feature both contract and spot exchange: the spot price is inversely related to the incidence of contract use in the market. We use a spatial model and a noncooperative game approach to show that processors can use exclusive contracts to manipulate the spot price in certain situations. Captive supplies in these settings represent geographic buffers that reduce competition among processors. However, in markets where the spatial dimension is less important, captive supplies are ineffective as barriers to competition because firms have incentive to "jump" across a captive supply region to procure the farm product.
X-ray reflection in the Seyfert galaxy 1H0419-577 revealing strong relativistic effects in the vicinity of a Kerr black hole
Creators: name: Fabian, A. C.
name: Miniutti, G.
name: Iwasawa, K.
name: Ross, R. R.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report results obtained from six XMM-Newton observations of the Seyfert galaxy 1H 0419-577. Here we show that the X-ray spectrum and variability are well described by a two-component model comprising a power law with constant spectral shape and variable normalisation and a much more constant ionised reflection component from the inner accretion. One of the observations was performed when the source was in a particularly low flux state in which the X-ray spectrum is rather peculiar and exhibits a very flat hard spectrum with broad residuals below 6.6 keV and a steep soft excess below about 1 keV. We interpret the spectrum as being reflection-dominated by X-ray reprocessed emission from the inner accretion disc. The primary continuum is almost completely unobserved possibly because of strong light bending towards the central black hole. The ionised reflection model simultaneously accounts for the broad residuals and hard flat spectrum and for the soft excess. The same model provides an excellent description of the data at all the other flux levels, the most important difference being a variation in the power law normalisation. Our results imply that most of the X-ray emission in this source originates from within few gravitational radii from the central black hole and requires that the compact object is an almost maximally spinning Kerr black hole. (abridged)
description: accepted for publication in MNRAS
RISK RESEARCH AND PUBLIC OUTREACH: A TALE OF TWO CULTURES?
Creators: name: Selley, Roger A.
name: Wilson, Paul N.
name: Selley, Roger A.
name: Wilson, Paul N.
Publisher: name: Unknown
Year: 1997
Subjects: Teaching/Communication/Extension/Profession

description: Agricultural economists have been challenged in recent years, by voices inside and outside the profession, to evaluate the integrity of the operational bridge between research and extension activities in the land grant system. This essay investigates links between the work of risk researchers and outreach programs. Survey results indicate that (a) a significant number of risk researchers are involved in extension activities; (b) extension economists are less frequently involved in risk research than their colleagues with no extension appointment; (c) full-time extension economists use less sophisticated risk tools in their outreach efforts than used in their research; and (d) all respondents, regardless of appointment, see a need for more applied risk analysis. Major challenges include a lack of financial support to close the data gap and to conduct relevant applied analysis present major communication challenges.