cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
MODELING ALTERNATIVE ZONING STRATEGIES IN FOREST MANAGEMENT
Creators: name: Krcmar, Emina
name: Vertinsky, Ilan
name: Van Kooten, G. Cornelis
name: Krcmar, Emina
name: Vertinsky, Ilan
name: Van Kooten, G. Cornelis
Publisher: name: Unknown
Year: 2004
Subjects: Environmental Economics and Policy
Resource /Energy Economics and Policy

description: To satisfy public demands for environmental values, forest companies face the prospect of reduced wood supply and increased costs. Some Canadian provincial governments have proposed intensifying silviculture in special zones dedicated to timber production as the means for pushing out the forest possibilities frontier. In this paper, we compare the traditional twozone land allocation framework, which includes ecological reserves and integrated forest management zones, with the triad (three-zone) scheme that adds a zone dedicated to intensive timber production. We compare the solutions of mixed-integer linear programs formulated under both land allocation frameworks and, through sensitivity analysis, explore the conditions under which the triad regime can offset the negative impact on timber production from increased environmental demands. Under realistic conditions characteristic of Coastal British Columbia, we show that higher environmental demands may be satisfied with the triad regime without increasing the financial burden on the industry or reducing its wood supply.
Observer with a constant proper acceleration
Creators: name: Semay, Claude
Publisher: name: arXiv
Year: 2006
Subjects: subject: Physics Education (physics.ed-ph)
subject: FOS: Physical sciences

description: Relying on the equivalence principle, a first approach of the general theory of relativity is presented using the spacetime metric of an observer with a constant proper acceleration. Within this non inertial frame, the equation of motion of a freely moving object is studied and the equation of motion of a second accelerated observer with the same proper acceleration is examined. A comparison of the metric of the accelerated observer with the metric due to a gravitational field is also performed.
description: 5 figures
Comparing Moment-Based and Monte Carlo Methods of Radiation Transport Modeling for Type II-Plateau Supernova Light Curves
Creators: name: Tsang, Benny T. -H.
name: Goldberg, Jared A.
name: Bildsten, Lars
name: Kasen, Daniel
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Time-dependent electromagnetic signatures from core-collapse supernovae are the result of detailed transport of the shock-deposited and radioactively-powered radiation through the stellar ejecta. Due to the complexity of the underlying radiative processes, considerable approximations are made to simplify key aspects of the radiation transport problem. We present a systematic comparison of the moment-based radiation hydrodynamical code STELLA and the Monte Carlo radiation transport code Sedona in the 1D modeling of Type II-Plateau supernovae. Based on explosion models generated from the Modules for Experiments in Stellar Astrophysics (MESA) instrument, we find remarkable agreements in the modeled light curves and the ejecta structure thermal evolution, affirming the fidelity of both radiation transport modeling approaches. The radiative moments computed directly by the Monte Carlo scheme in Sedona also verify the accuracy of the moment-based scheme. We find that the coarse resolutions of the opacity tables and the numerical approximations in STELLA have insignificant impact on the resulting bolometric light curves, making it an efficient tool for the specific task of optical light curve modeling.
description: 14 pages, 8 figures, accepted for publication in ApJ
Policy brief. Finding the gap: addressing the international migration data gaps
Creators: name: Bircan, T.
name: Ahmad-Yar, A.W.
name: Purkayastha, D.
name: Yilmaz, S.
Publisher: name: Zenodo
Year: 2021

description: Gaps in international migration data have persisted ever since the inter­national organisations started gathering and presenting data on migration. These data gaps hinder policymakers in their development of efficient policies for bet­ter migration management. This policy brief presents the most common and persistent gaps within the international migration data portals and recommends relevant solutions. The gaps encompass inconsistencies in definitions and measures, neglecting the drivers of migration, under-coverage of major geographies and demographic specifici­ties of migrants, and a lag in timely representation of the data. Moreover, the policy brief discusses the possibilities of tackling the data challenges through alternative data sources and method­ologies such as Big Data analytics.
CONSERVATION PAYMENTS UNDER RISK: A STOCHASTIC DOMINANCE APPROACH
Creators: name: Benitez, Pablo C.
name: Kuosmanen, Timo
name: Olschewski, Roland
name: Van Kooten, G. Cornelis
name: Benitez, Pablo C.
name: Kuosmanen, Timo
name: Olschewski, Roland
name: Van Kooten, G. Cornelis
Publisher: name: Unknown
Year: 2004
Subjects: International Development
Land Economics/Use
Resource /Energy Economics and Policy

description: Conservation payments can be used to preserve forest and agroforest systems in developing countries. To explain landowners' land-use decisions and determine the appropriate conservation payments, it is necessary to focus on risk associated with agricultural price and yield volatility. A theoretical framework is provided for assessing land-use allocation problems under risk and setting risk-efficient conservation payments when returns are not necessary normally distributed. Stochastic dominance rules are used to derive conditions for determining the conservation payments required to guarantee that the environmentally-preferred land use dominates, even when land uses are not considered to be mutually exclusive. An empirical application to shaded-coffee protection in the biologically important El Chocó region of West Ecuador shows that conservation payments required for preserving shaded-coffee areas are much higher than those calculated under the assumption of risk-neutrality. Further, the extant distribution of land has a strong impact on the required conservation payments.
The Formation of Primordial Luminous Objects
Creators: name: Ripamonti, Emanuele
name: Abel, Tom
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In these lecture notes we review the current knowledge about the formation of the first luminous objects. We start from the cosmological context of hierarchical models of structure formation, and discuss the main physical processes which are believed to lead to primordial star formation, i.e. the cooling processes and the chemistry of molecules (especially H2) in a metal-free gas. We then describe the techniques and results of numerical simulations, which indicate that the masses of the first luminous objects are likely to be much larger than that of present-day stars. Finally, we discuss the scenario presented above, exposing some of the most interesting problems which are currently being investigated, such as that of the feedback effects of these objects.
description: 51 pages, 25 figures. Lecture notes for the spring 2003 SIGRAV Doctoral School "The Joint Evolution of Black Holes and Galaxies", to be published in: M.Colpi, V.Gorini, F. Haardt, U. Moschella (eds.), "Joint Evolution of Black Holes and Galaxies", series in High Energy Physics, Cosmology and Gravitation, Institute of Physics Publishing, Bristol and Philadelphia
TESTS OF THE EKC HYPOTHESIS USING CO2 PANEL DATA
Creators: name: Shi, Jianping
name: Shi, Jianping
Publisher: name: Unknown
Year: 2004
Subjects: Environmental Economics and Policy
International Development

description: Environmental Kuznets Curve depicts the long-term relationship between pollution and economic growth. It hypothesizes that during the initial stages of economic growth environmental quality will deteriorate, then, after reaching some turning point, it will improve as the economy grows. In the past decade, lots of empirical literature provided both supports and criticism to this hypothesis. However, as we know from econometrics, when data contain stochastic trends, the conclusions drawn from such analysis might be meaningless. In this paper, we test the stationarities of a number of key variables used in such analyses using a panel data set for 50 countries over 50 years. The tests with different null hypothesis find that the data are stochastically trending in the time-series dimension. Given this, the regressions and interpretation of pollution-growth models should be interpreted with care. Further tests on cointegration of appropriate model are required.
SOCIAL DILEMMAS AND PUBLIC RANGE MANAGEMENT: RESULTS FROM THE NEVADA RANCH SURVEY
Creators: name: Van Kooten, G. Cornelis
name: Thomsen, Roy W.
name: Hobby, Thomas G.
name: Eagle, Alison J.
name: Van Kooten, G. Cornelis
name: Thomsen, Roy W.
name: Hobby, Thomas G.
name: Eagle, Alison J.
Publisher: name: Unknown
Year: 2003
Subjects: Land Economics/Use
Livestock Production/Industries
Resource /Energy Economics and Policy

description: Since the late 1960s, the Nevada ranch community has come under increasing pressure from environmental groups regarding their use of public lands for livestock grazing, thus increasing tension between ranchers and public land managers and potentially reducing the social capital that facilitates action and cooperation in range management. In this paper, we use responses to a survey of all public grazing permit holders in Nevada to investigate the changing relationships between ranchers and the public land agencies, and its potential implications. In particular, we investigate factors that affect ranchers' trust in the public land agencies, and then factors that influence the nature of the relationship between ranchers and the Bureau of Land Management and U.S. Forest Service. Low levels of trust between ranchers and public managers were most significantly related to previous disagreements and the belief in a poor future for ranching. The occurrence of wildfire on grazing land contributed most significantly to increased disagreement between ranchers and public agencies. Finally, as a response to conflict in the ranch community, community based initiatives, such as grass banking, are examined for their potential to bring stakeholders together to realize and address common goals. Community involvement in decision making may increase levels of social capital, reduce transaction costs, and thus allow for more effective and efficient use of the range resources
Selective branching, quenching, and converting of topological modes
Creators: name: Kariyado, Toshikaze
name: Slager, Robert-Jan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: A salient feature of topological phases are surface states and many of the widely studied physical properties are directly tied to their existence. Although less explored, a variety of topological phases can however similarly be distinguished by their response to localized flux defects, resulting in the binding of modes whose stability can be traced back to that of convectional edge states. The reduced dimensionality of these objects renders the possibility of arranging them in distinct geometries, such as arrays that branch or terminate in the bulk. We show that the prospect of hybridizing the modes in such new kinds of channels poses profound opportunities in a dynamical context. In particular, we find that creating junctions of $π$-flux chains or extending them as function of time can induce transistor and stop-and-go effects. Pending controllable initial conditions certain branches of the extended defect array can be actively biased. Discussing these physical effects within a generally applicable framework that relates to a variety of established artificial topological materials, such as mass-spring setups and LC circuits, our results offer an avenue to explore and manipulate new transport effects that are rooted in the topological characterization of the underlying system.
description: 6+3 pages, 4+3 figures
毛泽东的文化遗嘱和民权运动的文化标准 (Mao Zedong's Cultural Testament and Cultural Standards of Populist Movement)
Creators: name: Zexin(曹泽新), CAO
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 440811
subject: Political theory and political philosophy
classificationCode: 441005
subject: Social theory

description: 《毛泽东的文化遗嘱和民权运动的文化标准》，本文又名：《毛左大佬最反毛、最反动——张宏良等人文化立场的基本分析》本文主要根据张宏良等毛左大佬的言行及反映出来的文化立场，分析了毛左大佬反毛反动的基本文化性质，指出他们犬儒修正主义的本质。同时，文中指出，民众最难缠的敌人，从来不是外敌，而是包裹在民族主义招牌下的专制铁幕。民权运动要甄别出专制铁幕，就需要区分铁幕民族主义和民权民族主义。而区分这两个民族主义的文化标准，就是毛泽东晚年留下来的文化遗嘱。在“云中落绣鞋”点评事件中，毛泽东留下的文化遗嘱，嘱咐我们要从铁幕精英手中夺回我们的劳动果实和社会所有权。这个遗嘱也成为了民权运动的文化标准，区分出谁是我们的朋友，谁又是我们的文化敌人。谁支持我们这些井下的百九九爬到井上，并为之疾呼，谁就是我们的文化朋友；谁对我们陷于井下的现实视而不见，忽悠我们继续待在井下，谁就是我们的文化敌人。这个文化标准，还揭示了中国实际上有一个上中国和一个下中国两个中国的基本现实。通过这个文化标准，民权运动可以迅速区分文化上的敌我关系，并在文化层面完成下中国民众的心理动员，为经济民权运动创造成熟的社会条件。
Long Josephson Junction in a Resonant Cavity
Creators: name: Tornes, Ivan
name: Stroud, David
Publisher: name: arXiv
Year: 2005
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We present a model to describe an underdamped long Josephson junction coupled to a singlemode electromagnetic cavity, and carry out numerical calculations using this model in various regimes. The coupling may occur through either the electric or the magnetic eld of the cavity mode. When a current is injected into the junction, we nd that the time-averaged voltage exhibits self-induced resonant steps due to coupling between the current in the junction and the electric eld of the cavity mode. These steps are similar to those observed and calculated in small Josephson junctions. When a soliton is present in the junction (corresponding to a quantum of magnetic ux parallel to the junction plates), the SIRS's disappear if the electric eld in the cavity is spatially uniform. If the cavity mode has a spatially varying electric eld, there is a strong coupling between the soliton and the cavity mode. This coupling causes the soliton to become phase-locked to the cavity mode, and produces step-like anomalies on the soliton branch of the IV characteristics. If the coupling is strong enough, the frequency of the cavity mode is greatly red-shifted from its uncoupled value. We present simple geometrical arguments which account for this behavior.
description: 29 pages 15 figures
COMPENSATION FOR WILDLIFE DAMAGE: HABITAT CONVERSION, SPECIES PRESERVATION AND LOCAL WELFARE
Creators: name: Rondeau, Daniel
name: Bulte, Erwin H.
name: Rondeau, Daniel
name: Bulte, Erwin H.
Publisher: name: Unknown
Year: 2003
Subjects: Agricultural and Food Policy
Environmental Economics and Policy
Resource /Energy Economics and Policy

description: We study the environmental and economic consequences of introducing a program to compensate peasants of a small economy for the damage caused by wildlife. We show that the widely held belief that compensation induces wildlife conservation may be erroneous. In a partially open economy, compensation can lower the wildlife stock and result in a net welfare loss for local people. In an open economy, compensation can trigger wildlife extinction and also reduce welfare. The conditions leading to a reduction of the wildlife stock are identified and the implications for current and planned compensation programs are discussed.
Nitrogen doping of metallic single-walled carbon nanotubes: n-type conduction and dipole scattering
Creators: name: Krstic, V.
name: Rikken, G. L. J. A.
name: Bernier, P.
name: Roth, S.
name: Glerup, M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The charge transport properties of individual, metallic nitrogen doped, single-walled carbon nanotubes are investigated. It is demonstrated that n-type conduction can be achieved by nitrogen doping. Evidence was obtained by appealing to electric-field effect measurements at ambient condition. The observed temperature dependencies of the zero-bias conductance indicate a disordered electron system with electric-dipole scattering, caused mainly by the pyridine-type nitrogen atoms in the honeycomb lattice. These results illustrate the possibility of creating all-metallic molecular devices, in which the charge carrier type can be controlled.
description: 16 pages
Ubiquitous velocity fluctuations throughout the molecular interstellar medium
Creators: name: Henshaw, J. D.
name: Kruijssen, J. M. D.
name: Longmore, S. N.
name: Riener, M.
name: Leroy, A. K.
name: Rosolowsky, E.
name: Ginsburg, A.
name: Battersby, C.
name: Chevance, M.
name: Meidt, S. E.
name: Glover, S. C. O.
name: Hughes, A.
name: Kainulainen, J.
name: Klessen, R. S.
name: Schinnerer, E.
name: Schruba, A.
name: Beuther, H.
name: Bigiel, F.
name: Blanc, G. A.
name: Emsellem, E.
name: Henning, T.
name: Herrera, C. N.
name: Koch, E. W.
name: Pety, J.
name: Ragan, S. E.
name: Sun, J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The density structure of the interstellar medium (ISM) determines where stars form and release energy, momentum, and heavy elements, driving galaxy evolution. Density variations are seeded and amplified by gas motion, but the exact nature of this motion is unknown across spatial scale and galactic environment. Although dense star-forming gas likely emerges from a combination of instabilities, convergent flows, and turbulence, establishing the precise origin is challenging because it requires quantifying gas motion over many orders of magnitude in spatial scale. Here we measure the motion of molecular gas in the Milky Way and in nearby galaxy NGC 4321, assembling observations that span an unprecedented spatial dynamic range ($10^{-1}{-}10^3$ pc). We detect ubiquitous velocity fluctuations across all spatial scales and galactic environments. Statistical analysis of these fluctuations indicates how star-forming gas is assembled. We discover oscillatory gas flows with wavelengths ranging from $0.3{-}400$ pc. These flows are coupled to regularly-spaced density enhancements that likely form via gravitational instabilities. We also identify stochastic and scale-free velocity and density fluctuations, consistent with the structure generated in turbulent flows. Our results demonstrate that ISM structure cannot be considered in isolation. Instead, its formation and evolution is controlled by nested, interdependent flows of matter covering many orders of magnitude in spatial scale.
description: Published in Nature Astronomy on July 6th 2020. This is the authors' version before final edits. Includes methods and supplementary information. Link to the NA publication: https://www.nature.com/articles/s41550-020-1126-z
RESOLVING RANGE CONFLICT IN NEVADA? THE POTENTIAL FOR COMPENSATION VIA MONETARY PAYOUTS AND GRAZING ALTERNATIVES
Creators: name: Hobby, Thomas G.
name: Van Kooten, G. Cornelis
name: Hobby, Thomas G.
name: Van Kooten, G. Cornelis
Publisher: name: Unknown
Year: 2003
Subjects: Land Economics/Use
Livestock Production/Industries

description: In response to environmental pressure, public land agencies in Nevada have reduced animal unit months (AUMs) of grazing on public lands. This has resulted in economic losses to ranchers, increased conflict between ranchers and the public land agencies, and general unrest in the ranch community. One approach to resolving the problems might be to compensate ranchers for lost grazing privileges. In this study, we employ the results of the Nevada Ranch Survey to examine ranchers' willingness to accept a one-time payment to retire grazing rights, as well as three other means of "compensating" ranchers that enable them to earn a living from the public lands despite reduced access to public forage. The results suggest that ranchers are not keen on being compensated in any form, expressing a desire to continue ranching. However, those most amenable to compensation and a reworking of the social contract are those who have the best relationship with the public land manager and view the public agencies in a positive light
Economics of Forest and Agricultural Carbon Sinks
Creators: name: Van Kooten, G. Cornelis
name: Van Kooten, G. Cornelis
Publisher: name: Unknown
Year: 2004
Subjects: Environmental Economics and Policy
Resource /Energy Economics and Policy

description: As a result of the Kyoto Protocol (KP) and its so-called "flexibility mechanisms", climate change and mechanisms to mitigate its potential effects have attracted considerable economic and policy attention. A major reason for this attention is that the KP has a complex set of instruments that enable countries to achieve emissions reduction targets in a wide variety of ways, some of which are unlikely to lead to real, long-term reductions in greenhouse gas emissions. One purpose of this chapter, therefore, is to provide an overview of economic reasoning applied to climate change and to illustrate how terrestrial carbon uptake credits (offset credits) operate within the KP framework. Attention is focused on the feasibility of terrestrial carbon sinks to slow the rate of CO2 buildup in the atmosphere (Beattie, Bond and Manning 1981). I also examine the results of several empirical studies into the costs of carbon uptake in agricultural ecosystems and by forestry activities. For example, Manley et al. (2004) examined the costs of creating soil carbon sinks by switching from conventional to zero tillage. The viability of agricultural carbon sinks was found to vary by region and crop, with no-till representing a low-cost option in some regions (costs of less than $10/tC), but a high-cost option in others (costs of $100-$400/tC). A particularly relevant finding is that no-till cultivation may store no carbon at all if measurements are taken at sufficient depth. In some circumstances no-till cultivation may yield a "triple dividend" of carbon storage, increased returns and reduced soil erosion, but in many others creating carbon offset credits in agricultural soils is not cost effective because reduced tillage 1 Prepared for Climate Change and Managed Ecosystems edited by J.S. Bhatti, R. Lal, M. Apps and M. Price. Baton Roca, FL: CRC Press. 2 practices store little or no carbon. This is particularly the case in the Great Plains. In another study, van Kooten (2004) review estimates from 55 studies of the costs of creating carbon offsets using forestry. Lowest costs of sequestering carbon are through forest conservation, while tree planting and agroforestry activities increase costs by more than 200%. The use of marginal cost estimates instead of average cost results in much higher costs for carbon sequestration, in the range of thousands of dollars per tC, although few studies used this more-appropriate method of cost assessment. I conclude by making the case that, while there remains a great potential for carbon sinks, more attention needs to be paid to post-harvest. In the above research, post harvest storage of carbon in wood products yielded much lower cost estimates. Yet, the study of post harvest uses of biomass remains an area that requires greater attention by economists.
Bilocal quantum criticality
Creators: name: Scammell, Harley D.
name: Scheurer, Mathias S.
name: Sachdev, Subir
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider 2+1 dimensional conformal gauge theories coupled to additional degrees of freedom which induce a spatially local but long-range in time $1/(τ-τ')^2$ interaction between gauge-neutral local operators. Such theories have been argued to describe the hole-doped cuprates near optimal doping. We focus on a SU(2) gauge theory with $N_h$ flavors of adjoint Higgs fields undergoing a quantum transition between Higgs and confining phases: the $1/(τ-τ')^2$ interaction arises from a spectator large Fermi surface of electrons. The large $N_h$ expansion leads to an effective action containing fields which are bilocal in time but local in space. We find a strongly-coupled fixed point at order $1/N_h$, with dynamic critical exponent $z > 1$. We show that the entropy preserves hyperscaling, but nevertheless leads to a linear in temperature specific heat with a co-efficient which has a finite enhancement near the quantum critical point.
description: 30 pages, 4 figures
Relativistic analysis of the LISA long range optical links
Creators: name: Chauvineau, Bertrand
name: Pireaux, Sophie
name: Regimbau, Tania
name: Vinet, Jean-Yves
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The joint ESA/NASA LISA mission consists in three spacecraft on heliocentric orbits, flying in a triangular formation of 5 Mkm each side, linked by infrared optical beams. The aim of the mission is to detect gravitational waves in a low frequency band. For properly processing the science data, the propagation delays between spacecraft must be accurately known. We thus analyse the propagation of light between spacecraft in order to systematically derive the relativistic effects due to the static curvature of the Schwarzschild spacetime in which the spacecraft are orbiting with time-varying light-distances. In particular, our analysis allows to evaluate rigorously the Sagnac effect, and the gravitational (Einstein) redshift.
description: 6 figures; accepted for publication in PRD
The process gg -> WW as a background to the Higgs signal at the LHC
Creators: name: D"uhrssen, M.
name: Jakobs, K.
name: Marquard, P.
name: van der Bij, J. J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The production of W pairs from the one-loop gluon fusion process is studied. Formulas are presented for the helicity amplitudes keeping the top mass finite, but all other quark masses zero. The correlations among the leptons coming from the W bosons are kept. The contribution of this background to the Higgs boson search in the WW decay mode at the LHC is estimated by applying the cuts foreseen in experimental searches using the PYTHIA Monte Carlo program. Kinematic distributions for the final state leptons are compared to those of the Higgs boson signal and of the q qbar -> WW background. After applying final cuts, the gg background is found to be large, at the level of 35% of the q qbar background.The characteristics of the gg background are very similar to those of the signal. Therefore, an experimental normalization of this background component appears to be very difficult and the uncertainty must largely be determined by theory. As a result, the significance of a Higgs signal in the gg -> H -> WW mode at the LHC is reduced.
description: 24 pages, 4 figures
Ladder Operators and Hidden Algebras for Shape Invariant Nonseparable and Nondiagonalizable Modelswith Quadratic Complex Interaction. I. Two-Dimensional Model
Creators: name: Marquette, Ian
name: Quesne, Christiane
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: A shape invariant nonseparable and nondiagonalizable two-dimensional model with quadratic complex interaction, first studied by Cannata, Ioffe, and Nishnianidze, is re-examined with the purpose of exhibiting its hidden algebraic structure. The two operators $A^+$ and $A^-$, coming from the shape invariant supersymmetrical approach, where $A^+$ acts as a raising operator while $A^-$ annihilates all wavefunctions, are completed by introducing a novel pair of operators $B^+$ and $B^-$, where $B^-$ acts as the missing lowering operator. These four operators then serve as building blocks for constructing ${\mathfrak{gl}}(2)$ generators, acting within the set of associated functions belonging to the Jordan block corresponding to a given energy eigenvalue. This analysis is extended to the set of Jordan blocks by constructing two pairs of bosonic operators, finally yielding an ${\mathfrak{sp}}(4)$ algebra, as well as an ${\mathfrak{osp}}(1/4)$ superalgebra. Hence, the hidden algebraic structure of the model is very similar to that known for the two-dimensional real harmonic oscillator.
MANAGING FORESTS FOR MULTIPLE TRADEOFFS: COMPROMISING ON TIMBER, CARBON AND BIODIVERSITY OBJECTIVES
Creators: name: Krcmar, Emina
name: Van Kooten, G. Cornelis
name: Vertinsky, Ilan
name: Krcmar, Emina
name: Van Kooten, G. Cornelis
name: Vertinsky, Ilan
Publisher: name: Unknown
Year: 2004
Subjects: Environmental Economics and Policy
Resource /Energy Economics and Policy

description: In this paper, we develop a multiple objective, decision-making model that focuses on forest policies that simultaneously achieve carbon uptake and maintenance of ecosystem diversity objectives. Two forest carbon measures are used - a nominal (undiscounted) net carbon uptake as a proxy for long-term carbon sequestration and discounted net carbon uptake that captures the "fast" carbon accumulation aspect. Ecosystem diversity is expressed in terms of desired structures for forest and afforested agricultural land. Economic effects of possible strategies are examined by comparing attainment of these objectives with the net discounted returns from commercial timber harvests and agricultural activities. The tradeoffs between timber and non-timber objectives are obtained by means of compromise programming. Two measures of distance between the current objective values and the ideal ones are used to assess attainment of multiple goals. We explore how the choice of a measure affects the decisions and overall performance. The model is applied to the boreal forest and accompanying marginal agricultural lands in the Peace River region of northeastern British Columbia.
Empirical Bolometric Correction Coefficients for Nearby Main-Sequence Stars in Gaia Era
Creators: name: Eker, Z.
name: Soydugan, F.
name: Bilir, S.
name: Bakis, V.
name: Alicavus, F.
name: Ozer, S.
name: Aslan, G.
name: Alpsoy, M.
name: Kose, Y.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Nearby detached double-lined eclipsing binaries with most accurate data were studied and 290 systems were found with at least one main-sequence component having a metallicity $0.008\leq Z\leq 0.040$. Stellar parameters, light ratios, Gaia DR2 trigonometric parallaxes, extinctions and/or reddening were investigated and only 206 systems were selected eligible to calculate empirical bolometric corrections. NASA-IPAC Galactic dust maps were main source of extinctions. Unreliable extinctions at low Galactic latitudes $|b|\leq5^o$ were replaced with individual determinations, if they exist in the literature, else associated systems are discarded. Main-sequence stars of remaining systems were used to calculate bolometric corrections ($BC$) and to calibrate $BC-T_{eff}$ relation, which is valid in the range 3100-36000 K. De-reddened $(B-V)_0$ colours, on the other hand, allowed us to calibrate two intrinsic colour effective temperature relations, where the linear one is valid for $T_{eff}>10000$ K, while the quadratic relation is valid for $T_{eff}<10000$ K, that is, both are valid in the same temperature range $BC-T_{eff}$ relation is valid. New $BC$ computed from $T_{eff}$ and other astrophysical parameters are tabulated, as well.
description: 16 pages, including 10 figures and 6 tables, accepted for publication in Monthly Notices of the Royal Astronomical Society
Children’s contributions to family functioning through family-centered therapy : a collaborative case study approach
Creators: name: Aronchick-Zachernuk, Barbara
Publisher: name: University of British Columbia
Year: 2009

description: "Many family therapists have not received basic training in clinical work with children (i.e. child development, child psychopathology, child assessment or child therapy) and do not know how to relate to children as individuals." (Gil, 1994, p. v) Similarly, it has been argued, that childcentered clinicians tend to focus their energies upon providing direct and specific help to the individual child thereby operating in a relatively narrow band. This service may then occur at the expense of applying a wider-angled lens, one in which the family becomes the powerful force for problem reduction and change. This descriptive case study illuminates how an individual child, and the members of his family, view and interpret the child's behaviour, within the context of a child-in-family therapy approach. It examines a treatment model that posits the following supposition: that individual issues and concerns influence and are influenced by the family system, yet each one has a separate and distinct existence. Through this qualitative single case research study, the child and his family were viewed as the basic phenomenological unit and a model of inclusion was applied, where the "voice" of the child within the family dynamic was highlighted. Using, as a foundation for this exploration, historical to current theoretical and practice trends, an in-depth description of a multidimensional perspective for working with a young "identified" child and his family of origin, was provided. To frame the child's lived experience in therapy, a combined individual and family playtherapy intervention process was employed. This served to inform, guide, and interpret the child's contributions to his own personal development, and to the growth of his family system as a whole. Within this context, assessment and ongoing treatment strategies were analyzed in order to create a case study portraiture of a troubled child and the members of his family.
Relaxing Standard Hedging Assumptions in the Presence of Downside Risk
Creators: name: Mattos, Fabio
name: Garcia, Philip
name: Nelson, Carl H.
name: Mattos, Fabio
name: Garcia, Philip
name: Nelson, Carl H.
Publisher: name: Unknown
Year: 2005
Subjects: subject: Marketing
subject: FOS: Economics and business

description: The purpose of this study is to analyze how the introduction of a downside risk measure and less restrictive assumptions can change the optimal hedge ratio in the standard hedging problem. Based on a dataset of futures and cash prices for soybeans in the U.S., the empirical findings indicate that optimal hedge ratios change dramatically when a one-sided risk measure is adopted and standard assumptions are relaxed. Further, the results suggest that in a downside risk framework with realistic hedging assumptions there is little or no incentive for farmers to hedge.
The approximate tubular neighborhood theorem
Creators: name: Hughes, Bruce
Publisher: name: arXiv
Year: 2005
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57N80 (Primary) 55R65, 57N40, 58A35 (Secondary)

description: Skeleta and other pure subsets of manifold stratified spaces are shown to have neighborhoods which are teardrops of stratified approximate fibrations (under dimension and compactness assumptions). In general, the stratified approximate fibrations cannot be replaced by bundles, and the teardrops cannot be replaced by mapping cylinder neighborhoods. Thus, this is the best possible topological tubular neighborhood theorem in the stratified setting.
description: 23 pages, published version
title: Спортивно-оздоровительный туризм как основа воспитания подростков
Creators: name: ELS IPR BOOKS
Publisher: name: Ай Пи Ар Медиа
Year: 2021

description: На примере работы с детьми и подростками в подростковых клубах по специализациям «Спортивный туризм», «Спортивное ориентирование и юные спасатели» автором представлены конкретные теоретические, методические и практические приемы воспитания детей и подростков в сложный период становления и формирования личности. Рассмотрены основы безопасности в спортивном туризме и сохранение экологии как неотъемлемые части туризма. Монография предназначена для специалистов физической культуры и спорта, педагогов образовательных учреждений различного профиля, инструкторов туризма, а также для всех интересующихся вопросами воспитания детей и подростков.
The Value of Carcass Characteristic EPDs in Bred Heifer Price
Creators: name: Parcell, Joseph L.
name: Dhuyvetter, Kevin C.
name: Patterson, David J.
name: Randle, Richard
name: Parcell, Joseph L.
name: Dhuyvetter, Kevin C.
name: Patterson, David J.
name: Randle, Richard
Publisher: name: Unknown
Year: 2005
Subjects: Demand and Price Analysis
Livestock Production/Industries

description: This study used hedonic modeling to assess the marginal implicit value of bred heifer characteristics and of carcass characteristic expected progeny differences of bred heifer calves. Using data for 692 pens of Show-Me Replacement Heifers Inc. heifers marketed over the 2001 through 2004 period, we find heavier heifers are priced higher than lighter heifers, artificially inseminated heifer pens were premium priced, Angus animals received a premium, pens that are expected to calve at optimal period of the year and within a 30-day window received premiums, calf performance EPD birth weight was positive, only marbling carcass characteristic EPD was positive and significant, buyers prefer larger lots to smaller lots, buyers pay the highest price for lots sold during the mid-point of the sale, and buyers pay a higher price for a pen bred to the same sire. It may be that certain post-weaning carcass characteristics are not of value to buyers because they either sell at weaning or due to the co-mingling of cattle certain expected production capabilities are of little value.
Measuring the total infrared light from galaxy clusters at z=0.5-1.6: connecting stellar populations to dusty star formation
Creators: name: Alberts, Stacey
name: Lee, Kyoung-Soo
name: Pope, Alexandra
name: Brodwin, Mark
name: Chiang, Yi-Kuan
name: McKinney, Jed
name: Xue, Rui
name: Huang, Yun
name: Brown, Michael
name: Dey, Arjun
name: Eisenhardt, Peter R. M.
name: Jannuzi, Buell T.
name: Popescu, Roxana
name: Ramakrishnan, Vandana
name: Stanford, Spencer A.
name: Weiner, Benjamin J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Massive galaxy clusters undergo strong evolution from z~1.6 to z~0.5, with overdense environments at high-z characterized by abundant dust-obscured star formation and stellar mass growth which rapidly give way to widespread quenching. Data spanning the near- to far-infrared (IR) spectrum can directly trace this transformation; however, such studies have largely been limited to the massive galaxy end of cluster populations. In this work, we present ``total light" stacking techniques spanning 3.4-500μm aimed at revealing the total cluster IR emission, including low mass members and potential intracluster dust. We detail our procedures for WISE, Spitzer, and Herschel imaging, including corrections to recover the total stacked emission in the case of high fractions of detected galaxies. We apply our stacking techniques to 232 well-studied massive (log M200/Msun~13.8) clusters across multiple z bins, recovering extended cluster emission at all wavelengths, typically at >5sigma. We measure the averaged near- to far-IR radial profiles and SEDs, quantifying the total stellar and dust content. The near-IR radial profiles are well described by an NFW model with a high (c~7) concentration parameter. Dust emission is similarly concentrated, albeit suppressed at small radii (r<0.2Mpc). The measured SEDs lack warm dust, consistent with the colder SEDs expected for low mass galaxies. We derive total stellar masses consistent with the theoretical Mhalo-M_star relation and specific-star formation rates that evolve strongly with redshift, echoing that of massive (log Mstar/Msun>10) cluster galaxies. Separating out the massive galaxy population reveals that the majority of cluster far-IR emission (~70-80%) is provided by the low mass constituents, which differs from field galaxies. This effect may be a combination of mass-dependent quenching and excess dust in low mass cluster galaxies.
description: 32 pages, 16 figures, 7 tables. Submitted to MNRAS, comments welcome!
title: Professional English in Navigation
Creators: name: ELS IPR BOOKS
Publisher: name: Профобразование
Year: 2020

description: Данное учебное пособие дает возможность курсантам расширить свои знания по устным темам профессионального характера в соответствии с учебным планом и направлено на практическое применение этих знаний в дальнейшей работе при осуществлении различных операций, таких как процесс принятия лоцмана, прохождение через узкости и каналы, постановка на якорь, швартовка и буксировка с применением Стандартного морского навигационного словаря-разговорника (СМНР) по вышеуказанным темам и Международных правил предотвращения столкновений судов в море (МППСС). Издание включает в себя адаптированные тексты с комплексом лексико-грамматических упражнений, терминологический словарь и аутентичные тексты профессиональной направленности из научно-популярной литературы и журналов для самостоятельного (домашнего) чтения. Подготовлено в соответствии с требованиями Федерального государственного образовательного стандарта среднего профессионального образования. Предназначено для курсантов морских колледжей, обучающихся по специальности 26.02.03 «Судовождение», для изучения дисциплины «Иностранный (английский) язык».
Yukawa enhanced electroweak corrections at high energy in the MSSM
Creators: name: Beccaria, Matteo
name: Mirabella, Edoardo
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider the electroweak radiative corrections in the MSSM and study the purely Yukawa contributions ${\cal O}(α^L y_t^{2p} y_b^{2q})$, $p+q=L$, where $y_{t,b}$ are the top and bottom quark Yukawa couplings. We show that these corrections can be computed in a gaugeless limit of the MSSM where they are under Renormalization Group control. As an application, we present explicit results for various ILC and LHC processes valid at all orders in the loop expansion and at leading order in the large logarithms that arise at high energy.
description: 21 pages, 5 Eps figures
Ladder Operators and Hidden Algebras for Shape Invariant Nonseparable and Nondiagonalizable Modelswith Quadratic Complex Interaction. II. Three-Dimensional Model
Creators: name: Marquette, Ian
name: Quesne, Christiane
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: A shape invariant nonseparable and nondiagonalizable three-dimensional model with quadratic complex interaction was introduced by Bardavelidze, Cannata, Ioffe, and Nishnianidze. However, the complete hidden symmetry algebra and the description of the associated states that form Jordan blocks remained to be studied. We present a set of six operators $\{A^{\pm},B^{\pm},C^{\pm}\}$ that can be combined to build a ${\mathfrak{gl}}(3)$ hidden algebra. The latter can be embedded in an ${\mathfrak{sp}}(6)$ algebra, as well as in an ${\mathfrak{osp}}(1/6)$ superalgebra. The states associated with the eigenstates and making Jordan blocks are induced in different ways by combinations of operators acting on the ground state. We present the action of these operators and study the construction of an extended biorthogonal basis. These rely on establishing various nontrivial polynomial and commutator identities. We also make a connection between the hidden symmetry and the underlying superintegrability property of the model. Interestingly, the integrals generate a cubic algebra. This work demonstrates how various concepts that have been applied widely to Hermitian Hamiltonians, such as hidden symmetries, superintegrability, and ladder operators, extend to the pseudo-Hermitian case with many differences.
Non-Hermitian Physics
Creators: name: Ashida, Yuto
name: Gong, Zongping
name: Ueda, Masahito
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A review is given on the foundations and applications of non-Hermitian classical and quantum physics. First, key theorems and central concepts in non-Hermitian linear algebra, including Jordan normal form, biorthogonality, exceptional points, pseudo-Hermiticity and parity-time symmetry, are delineated in a pedagogical and mathematically coherent manner. Building on these, we provide an overview of how diverse classical systems, ranging from photonics, mechanics, electrical circuits, acoustics to active matter, can be used to simulate non-Hermitian wave physics. In particular, we discuss rich and unique phenomena found therein, such as unidirectional invisibility, enhanced sensitivity, topological energy transfer, coherent perfect absorption, single-mode lasing, and robust biological transport. We then explain in detail how non-Hermitian operators emerge as an effective description of open quantum systems on the basis of the Feshbach projection approach and the quantum trajectory approach. We discuss their applications to physical systems relevant to a variety of fields, including atomic, molecular and optical physics, mesoscopic physics, and nuclear physics with emphasis on prominent phenomena/subjects in quantum regimes, such as quantum resonances, superradiance, continuous quantum Zeno effect, quantum critical phenomena, Dirac spectra in quantum chromodynamics, and nonunitary conformal field theories. Finally, we introduce the notion of band topology in complex spectra of non-Hermitian systems and present their classifications by providing the proof, firstly given by this review in a complete manner, as well as a number of instructive examples. Other topics related to non-Hermitian physics, including nonreciprocal transport, speed limits, nonunitary quantum walk, are also reviewed.
description: Review article commissioned by Advances in Physics - 191 pages, 49 figures, 8 tables
A Test of Forecast Consistency Using USDA Livestock Price Forecasts
Creators: name: Sanders, Dwight R.
name: Manfredo, Mark R.
name: Sanders, Dwight R.
name: Manfredo, Mark R.
Publisher: name: Unknown
Year: 2005
Subjects: Demand and Price Analysis

description: In traditional tests of forecast rationality, price forecasts are usually differenced to obtain stationarity. However, this data transformation may ignore important long-run information contained in forecasted price levels. Here, the concept of forecast consistency is paired with rationality concepts used in the market efficiency literature to develop a sequential testing procedure for forecast consistency and rationality. USDA quarterly livestock price forecasts do not demonstrate long-run consistency.
title: Статистика
Creators: name: ELS IPR BOOKS
Publisher: name: Профобразование
Year: 2021

description: Предлагаемый учебник дает общее представление об основах статистики. Издание содержит теоретическую часть, которая включает в себя приведение основных понятий и формул, используемых в статистическом анализе, и практические рекомендации и алгоритмы решения типовых задач по всем основным темам дисциплины. Подготовлен в соответствии с требованиями Федерального государственного образовательного стандарта среднего профессионального образования. Учебник предназначен для студентов укрупненной группы специальностей 38.00.00 «Экономика и управление», изучающих дисциплину «Статистика». Может быть использован студентами других специальностей, учебными планами которых предусмотрено изучение указанной дисциплины. Издание будет также полезно преподавателям, специалистам и руководителям, изучающим статистические методы анализа экономических процессов.