cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Lyth Bound and the End of Inflation
Creators: name: Easther, Richard
name: Kinney, William H.
name: Powell, Brian A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We derive an extended version of the well-known Lyth Bound on the total variation of the inflaton field, incorporating higher order corrections in slow roll. We connect the field variation $Δϕ$ to both the spectral index of scalar perturbations and the amplitude of tensor modes. We then investigate the implications of this bound for ``small field'' potentials, where the field rolls off a local maximum of the potential. The total field variation during inflation is {\em generically} of order $m_{\rm Pl}$, even for potentials with a suppressed tensor/scalar ratio. Much of the total field excursion arises in the last e-fold of inflation and in single field models this problem can only be avoided via fine-tuning or the imposition of a symmetry. Finally, we discuss the implications of this result for inflationary model building in string theory and supergravity.
description: 10 pages, RevTeX, 2 figures (V3: version accepted for publication by JCAP)
Otto, Heinrich, Werden und Wesen des Quäkertums und seine Entwicklung in Deutschland
Creators: name: Krüger
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 22 Nr. 3 (1973): Ökumenische Rundschau, Band 22, Heft 3
Anomalous Spin Polarization of GaAs Two-Dimensional Hole Systems
Creators: name: Winkler, R.
name: Tutuc, E.
name: Papadakis, S. J.
name: Melinte, S.
name: Shayegan, M.
name: Wasserman, D.
name: Lyon, S. A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report measurements and calculations of the spin-subband depopulation, induced by a parallel magnetic field, of dilute GaAs two-dimensional (2D) hole systems. The results reveal that the shape of the confining potential dramatically affects the values of in-plane magnetic field at which the upper spin subband is depopulated. Most surprisingly, unlike 2D electron systems, the carrier-carrier interaction in 2D hole systems does not significantly enhance the spin susceptibility. We interpret our findings using a multipole expansion of the spin density matrix, and suggest that the suppression of the enhancement is related to the holes' band structure and effective spin j=3/2.
description: 6 pages, 4 figures, substantially extended discussion of results
Electromagnetic radiative corrections in parity-violating electron-proton scattering
Creators: name: Arvieux, J.
name: Collin, B.
name: Guler, H.
name: Morlet, M.
name: Niccolai, S.
name: Ong, S.
name: Van de Wiele, J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: QED radiative corrections have been calculated for leptonic and hadronic variables in parity-violating elastic ep scattering. For the first time, the calculation of the asymmetry in the elastic radiative tail is performed without the peaking-approximation assumption in hadronic variables configuration. A comparison with the PV-A4 data validates our approach. This method has been also used to evaluate the radiative corrections to the parity-violating asymmetry measured in the G0 experiment. The results obtained are here presented.
description: 12 pages, 11 figures
Would U.S. Dairy Firms Increase Long-Term Profits By Becoming Bigger Exporters and Bigger Investors in Foreign Dairy-Food Businesses?
Creators: name: Dobson, William D.
name: Dobson, William D.
Publisher: name: Unknown
Year: 2002
Subjects: Industrial Organization
International Relations/Trade
Livestock Production/Industries

description: The answer to the question posed in the title is arguably, yes. U.S. firms appear to be well positioned to profitably expand exports of highly differentiated dairy products and selected dairy ingredients, especially dried whey products. However, U.S. bulk cheese, butter and nonfat dry milk (NFDM) are, for the most part, priced out of foreign markets by U.S. border protection and the dairy price support program. If, as claimed by a former Nestle CEO, the U.S. dairy-food market is "flat and fiercely competitive," U.S. companies may find it profitable to expand direct investments in foreign dairy-food businesses both in the near term and over the longer-run. Failure of U.S. companies to take advantage of opportunities in foreign dairy markets poses risks and will continue to cede early-mover advantages for serving the growth markets of Asia and Latin America to the New Zealanders, Australians, Western Europeans, and others. U.S. firms are doing some things right to prepare for a world where foreign dairy sales will be more important.
Detecting anomalous citation groups in journal networks
Creators: name: Kojaku, Sadamori
name: Livan, Giacomo
name: Masuda, Naoki
Publisher: name: arXiv
Year: 2020
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: The ever-increasing competitiveness in the academic publishing market incentivizes journal editors to pursue higher impact factors. This translates into journals becoming more selective, and, ultimately, into higher publication standards. However, the fixation on higher impact factors leads some journals to artificially boost impact factors through the coordinated effort of a "citation cartel" of journals. "Citation cartel" behavior has become increasingly common in recent years, with several instances being reported. Here, we propose an algorithm -- named CIDRE -- to detect anomalous groups of journals that exchange citations at excessively high rates when compared against a null model that accounts for scientific communities and journal size. CIDRE detects more than half of the journals suspended from Journal Citation Reports due to anomalous citation behavior in the year of suspension or in advance. Furthermore, CIDRE detects many new anomalous groups, where the impact factors of the member journals are lifted substantially higher by the citations from other member journals. We describe a number of such examples in detail and discuss the implications of our findings with regard to the current academic climate.
description: 14 pages, 5 figures
Gamma-Ray Bursts and the Earth: Exploration of Atmospheric, Biological, Climatic and Biogeochemical Effects
Creators: name: Thomas, Brian C.
name: Melott, Adrian L.
name: Jackman, Charles H.
name: Laird, Claude M.
name: Medvedev, Mikhail V.
name: Stolarski, Richard S.
name: Gehrels, Neil
name: Cannizzo, John K.
name: Hogan, Daniel P.
name: Ejzak, Larissa M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Biological Physics (physics.bio-ph)
subject: Geophysics (physics.geo-ph)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: Gamma-Ray Bursts (GRBs) are likely to have made a number of significant impacts on the Earth during the last billion years. We have used a two-dimensional atmospheric model to investigate the effects on the Earth's atmosphere of GRBs delivering a range of fluences, at various latitudes, at the equinoxes and solstices, and at different times of day. We have estimated DNA damage levels caused by increased solar UVB radiation, reduction in solar visible light due to $\mathrm{NO_2}$ opacity, and deposition of nitrates through rainout of $\mathrm{HNO_3}$. For the ``typical'' nearest burst in the last billion years, we find globally averaged ozone depletion up to 38%. Localized depletion reaches as much as 74%. Significant global depletion (at least 10%) persists up to about 7 years after the burst. Our results depend strongly on time of year and latitude over which the burst occurs. We find DNA damage of up to 16 times the normal annual global average, well above lethal levels for simple life forms such as phytoplankton. The greatest damage occurs at low to mid latitudes. We find reductions in visible sunlight of a few percent, primarily in the polar regions. Nitrate deposition similar to or slightly greater than that currently caused by lightning is also observed, lasting several years. We discuss how these results support the hypothesis that the Late Ordovician mass extinction may have been initiated by a GRB.
description: Minor revisions, includes more discussion of reaction rates; 1 new figure. Accepted for publication in ApJ. 68 pages, 21 figures, 12 tables
Kiaeroceras undefined-C
Creators: name: Kröger, Björn
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Mollusca
Cephalopoda
Cyrtogomphoceratidae
Kiaeroceras
Kiaeroceras undefined-C

description: Kiaeroceras sp. C
Fig. 35E, G
Material examined
ESTONIA • 1 spec.; Niibi hillock; Moe Formation, Pirgu Regional Stage; GIT 225-997.
Description
The specimen is a nearly complete mold of a mature body chamber with height, width, and length of 53 mm, 44 mm and 75 mm, respectively (CHI = 1.11). The conch is straight and tubular. The conch cross section is oval compressed with a relatively narrow, drop-shaped margin on the prosiphuncular side. The peristome is nearly straight and a very shallow (5 mm) hyponomic sinus occurs on the prosiphuncular side. The siphuncle is nearly marginal with a septal foramen ca 8 mm in diameter, located ca 3 mm from the conch margin (RSH = 0.15, RSP = 0.16).
Comparison
This specimen differs from K. ormsoense sp. nov., to which it is otherwise similar, in having a compressed conch cross section and a longer, perfectly tubular body chamber (RBL = 1.4 as compared with RBL ca 1 in K. (?) ormsoense).
description: Published as part of Kröger, Björn, 2025, The Lyckholm acme of cephalopods - Review of the late Katian (Vormsi-Pirgu regional stages) Ordovician cephalopods of Estonia, pp. 1-169 in European Journal of Taxonomy 978 on pages 111-112, DOI: 10.5852/ejt.2025.978.2801, http://zenodo.org/record/14988376
DOIS PAÍSES, UMA EXPERIÊNCIA: INTERCÂMBIO EDUCACIONAL ENTRE BRASIL E PARAGUAI
Creators: name: Avaetê de Lunetta e Rodrigues Guerra
name: Verónica Lezcano
name: Shirley Vallejos de Ibars
name: Eraldo Alves de Sousa
Publisher: name: Zenodo
Year: 2024

description: A justificativa para a realização dessa pesquisa reside no fato de que o intercâmbio educacional entre Brasil e Paraguai ainda é pouco explorado e estudado. Embora esses dois países compartilhem fronteiras e uma história de relações comerciais e culturais, há uma lacuna de conhecimento sobre como essa troca de experiências pode impactar positivamente no campo da educação de ambos os países. Objetiva-se identificar elementos comuns e diferenças que podem influenciar o sucesso dessa experiência. Essa análise teórica permite uma compreensão mais aprofundada dos fatores que contribuem para o sucesso educacional entre esses dois países. No artigo em questão, foi utilizada a metodologia de pesquisa bibliográfica, através da busca em bases de dados acadêmicas, como Scopus e Google Scholar, foram selecionados trabalhos que abordam o tema, tanto no contexto brasileiro quanto paraguaio. As contribuições trazidas podem incentivar a sociedade a valorizar o intercâmbio educacional como uma forma de promover a integração entre os países e o desenvolvimento pessoal e profissional dos estudantes. As relações educacionais entre Brasil e Paraguai podem contribuir para a formação de cidadãos mais preparados para enfrentar os desafios do mundo globalizado e para fortalecer os laços entre os dois países.
3d Large $N$ Vector Models at the Boundary
Creators: name: Di Pietro, Lorenzo
name: Lauria, Edoardo
name: Niro, Pierluigi
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We consider a 4d scalar field coupled to large $N$ free or critical $O(N)$ vector models, either bosonic or fermionic, on a 3d boundary. We compute the $β$ function of the classically marginal bulk/boundary interaction at the first non-trivial order in the large $N$ expansion and exactly in the coupling. Starting with the free (critical) vector model at weak coupling, we find a fixed point at infinite coupling in which the boundary theory is the critical (free) vector model and the bulk decouples. We show that a strong/weak duality relates one description of the renormalization group flow to another one in which the free and the critical vector models are exchanged. We then consider the theory with an additional Maxwell field in the bulk, which also gives decoupling limits with gauged vector models on the boundary.
description: 49 pages, v3: minor changes
PROJECTED CONSUMPTION OF LIVESTOCK PRODUCTS
Creators: name: Grande, Jorunn
name: Houck, James P.
name: Olson, Kent D.
name: Grande, Jorunn
name: Houck, James P.
name: Olson, Kent D.
Publisher: name: Unknown
Year: 1994
Subjects: Food Consumption/Nutrition/Food Safety
Livestock Production/Industries

description: The U.S. consumption pattern of livestock products has changed considerably and is expected to keep changing. The first part of this paper reviews the consumption trends and the price and nonprice factors affecting those trends. In the second part, future consumption patterns are projected. The projections of the constant income elasticity model and the Tornquist functions are rejected due to recent trends which do not receive enough weight in these models. A third model which projects consumption shares is selected as a more accurate predictor. By the year 2010, national consumption of beef is estimated to decrease by 5 to 10%; pork to increase by up to 5%. Lamb and mutton will continue to be consumed less. Poultry consumption will increase dramatically while egg consumption will decrease.
The role of dissipation in biasing the vacuum selection in quantum field theory at finite temperature
Creators: name: Freire, F.
name: Antunes, N. D.
name: Salmi, P.
name: Achucarro, A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the symmetry breaking pattern of an O(4) symmetric model of scalar fields, with both charged and neutral fields, interacting with a photon bath. Nagasawa and Brandenberger argued that in favourable circumstances the vacuum manifold would be reduced from S^3 to S^1. Here it is shown that a selective condensation of the neutral fields, that are not directly coupled to photons, can be achieved in the presence of a minimal ``external'' dissipation, i.e. not related to interactions with a bath. This should be relevant in the early universe or in heavy-ion collisions where dissipation occurs due to expansion.
description: Final version to appear in Phys. Rev. D, 2 figures added, 2 new sub-sections
Holographic Anisotropic Model for Light Quarks with Confinement-Deconfinement Phase Transition
Creators: name: Aref'eva, Irina
name: Rannu, Kristina
name: Slepov, Pavel
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a five-dimensional anisotropic holographic model for light quarks supported by Einstein-dilaton-two-Maxwell action. This model generalizing isotropic holographic model with light quarks is characterized by a Van der Waals-like phase transition between small and large black holes. We compare the location of the phase transition for Wilson loops with the positions of the phase transition related to the background instability and describe the QCD phase diagram in the thermodynamic plane -- temperature $T$ and chemical potential $μ$. The Cornell potential behavior in this anisotropic model is also studied. The asymptotics of the Cornell potential at large distances strongly depend on the parameter of anisotropy and orientation. There is also a nontrivial dependence of the Cornell potential on the boundary conditions of the dilaton field and parameter of anisotropy. With the help of the boundary conditions for the dilaton field one fits the results of the lattice calculations for the string tension as a function of temperature in isotropic case and then generalize to the anisotropic one.
description: LaTex, 31 pages, 22 figures, minor corrections, refs added
Equilibrium spin currents and magnetoelectric effect in magnetic nanostructures
Creators: name: Bruno, Patrick
name: Dugaev, Vitalii K.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We discuss the problem of equilibrium spin currents in ferromagnets with inhomogeneous magnetization. Using simple microscopic models we explain the physical origin of equilibrium spin currents. Next we derive the equilibrium spin current from the Hamiltonian with a gauge field associated with local rotations in the spin space. Several examples of magnetic systems are studied in details, and the persistent spin current is found to exist in the ground state of these systems. We also demonstrate the possibility to measure the equilibrium spin current using the magnetoelectrically induced electric field near the ring.
description: RevTex 4 (4 pages)
KP integrability of triple Hodge integrals. I. From Givental group to hierarchy symmetries
Creators: name: Alexandrov, Alexander
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Algebraic Geometry (math.AG)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: Primary: 37K10, 14N35, 81R10, 14N10, Secondary: 81T32

description: In this paper, we investigate a relation between the Givental group of rank one and the Heisenberg-Virasoro symmetry group of the KP hierarchy. We prove, that only a two-parameter family of the Givental operators can be identified with elements of the Heisenberg-Virasoro symmetry group. This family describes triple Hodge integrals satisfying the Calabi-Yau condition. Using the identification of the elements of two groups we prove that the generating function of triple Hodge integrals satisfying the Calabi-Yau condition and its $Θ$-version are tau-functions of the KP hierarchy. This generalizes the result of Kazarian on KP integrability in the case of linear Hodge integrals.
description: 32 pages, published version
AN ECONOMIC ANALYSIS OF STABILIZING SCHEMES
Creators: name: Subotnik, Abraham
name: Houck, James P.
name: Subotnik, Abraham
name: Houck, James P.
Publisher: name: Unknown
Year: 1975
Subjects: Institutional and Behavioral Economics

description: The main purpose of this paper is to analyze the welfare implications of stabilizing consumption and production and to compare it with the already-known welfare implications of stabilizing prices. Two sets of assumptions regarding supply behavior will be considered: (1) supply reacts instantaneously to a change in market prices, (2) producers react to changes in expected prices and expectations are "rational" within the context developed by J.F. Muth.
Singlet-Triplet Relaxation in Two-electron Silicon Quantum Dots
Creators: name: Prada, M.
name: Blick, R. H.
name: Joynt, R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We investigate the singlet-triplet relaxation process of a two electron silicon quantum dot. In the absence of a perpendicular magnetic field, we find that spin-orbit coupling is not the main source of singlet-triplet relaxation. Relaxation in this regime occurs mainly via virtual states and is due to nuclear hyperfine coupling. In the presence of an external magnetic field perpendicular to the plane of the dot, the spin-orbit coupling is important and virtual states are not required. We find that there can be strong anisotropy for different field directions: parallel magnetic field can increase substantially the relaxation time due to Zeeman splitting, but when the magnetic field is applied perpendicular to the plane, the enhancement of the spin-orbit effect shortens the relaxation time. We find the relaxation to be orders of magnitude longer than for GaAs quantum dots, due to weaker hyperfine and spin-orbit effects.
description: 5 pages, 3 figures
The structure relation for Askey-Wilson polynomials
Creators: name: Koornwinder, Tom H.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 33D45; 33C45

description: An explicit structure relation for Askey-Wilson polynomials is given. This involves a divided q-difference operator which is skew symmetric with respect to the Askey-Wilson inner product and which sends polynomials of degree n to polynomials of degree n+1. By specialization of parameters and by taking limits, similar structure relations, as well as lowering and raising relations, can be obtained for other families in the q-Askey scheme and the Askey scheme. This is explicitly discussed for Jacobi polynomials, continuous q-Jacobi polynomials, continuous q-ultraspherical polynomials, and for big q-Jacobi polynomials. An already known structure relation for this last family can be obtained from the new structure relation by using the three-term recurence relation and the second order q-difference formula. The results are also put in the framework of a more general theory. Their relationship with earlier work by Zhedanov and Bangerezako is discussed. There is also a connection with the string equation in discrete matrix models and with the Sklyanin algebra.
description: 18 pages, minor corrections and updated references
SU(3) Relations and the CP Asymmetry in $B \to K_S K_S K_S$
Creators: name: Engelhard, Guy
name: Nir, Yosef
name: Raz, Guy
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The CP asymmetry in the $B \to K_S K_S K_S$ decay is being measured by the two B factories. A large deviation of the CP asymmetry $S_{K_S K_S K_S}$ from $-S_{ψK_S}$ and/or of $C_{K_S K_S K_S}$ from zero would imply new physics in $b \to s$ transitions. We try to put upper bounds on the Standard Model size of these deviations, using SU(3) flavor relations and experimental data on the branching ratios of various decay modes that proceed via $b \to d$ transitions. We point out several subtleties that distinguish the case of three body final states from two body ones. We present several simple relations that can become useful once all relevant modes are measured accurately enough.
description: 21 pages, 1 figure, 1 table, revtex4
A new way to test the WIMP dark matter models
Creators: name: Cheng, Wei
name: He, Yuan
name: Diao, Jin-Wang
name: Pan, Yu
name: Zeng, Jun
name: Zhang, Jia-Wei
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper, we investigate the possibility of testing the weakly interacting massive particle (WIMP) dark matter (DM) models by applying the simplest phenomenological model which introduces an interaction term between dark energy (DE) and WIMP DM, i.e., $Q = 3γ_{DM} Hρ_{DM}$. In general, the coupling strength $γ_{DE}$ is close to $0$ as the interaction between DE and WIMP DM is very weak, thus the effect of $γ_ {DE}$ on the evolution of $Y$ associated with DM energy density can be safely neglected. Meanwhile, our numerical calculation also indicates that $x_f\approx20$ is associated with DM freeze-out temperature, which is the same as the vanishing interaction scenario. As for DM relic density, it will be magnified by $\frac{2-3γ_{DM}}{2}[{2πg_* m_{DM}^3}/{(45 s_0 x_f^3})]^{γ_{DM}}$ times, which provides a new way to test WIMP DM models. As an example, we analyze the case in which WIMP DM is a scalar DM. (SGL+SNe+Hz) and (CMB+BAO+SNe) cosmological observations will give $γ_{DM}=0.134^{+0.17}_{-0.069}$ and $γ_{DM}=-0.0008\pm0.0016$, respectively. After further considering the constraints from DM direct detection experiment, DM indirect detection experiment, and DM relic density, we find that the allowed parameter space of the scalar DM model will be completely excluded for the former cosmological observations, while it will increase for the latter ones. Those two cosmological observations lead to an almost paradoxical conclusion. Therefore, one could expect more stringent constraints on the WMIP DM models, with the accumulation of more accurate cosmological observations in the near future.
description: 23 pages, 7 figures
A REGIONAL COMPARISON OF FARM COSTS AND RETURNS AMONG TOP DAIRY PRODUCERS
Creators: name: Kaiser, Harry M.
name: Morehart, Mitchell J.
name: Kaiser, Harry M.
name: Morehart, Mitchell J.
Publisher: name: Unknown
Year: 1994
Subjects: Livestock Production/Industries

description: The purpose of this paper is to compare costs and returns of the top dairy producers in the Upper Midwest to those in other major dairy regions of the U.S. The analysis is based on the 1989 Farm Costs and Returns Survey conducted by the U.S. Department of Agriculture. The top dairy farmers are defined in several ways, including: (1) highest returns to capital and management, (2) lowest total cash costs, and (3) highest milk marketings per cow.
Revisiting the chain magnetism in Sr14Cu24O41: Experimental and numerical results
Creators: name: Klingeler, R.
name: Buchner, B.
name: Choi, K. -Y.
name: Kataev, V.
name: Ammerahl, U.
name: Revcolevschi, A.
name: Schnack, J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the magnetism of the hole doped CuO2 spin chains in Sr14Cu24O41 by measuring the Electron Spin Resonance (ESR) and the static magnetization M in applied magnetic fields up to 14 T. In this compound, the dimerized ground state and the charge order in the chains are well established. Our experimental data suggest that at low temperatures the Curie-like increase of M as well as the occurrence of the related ESR signal are due to a small amount of paramagnetic centers which are not extrinsic defects but rather unpaired Cu spins in the chain. These observations qualitatively confirm recent ab initio calculations of the ground state properties of the CuO2 chains in Sr14Cu24O41. Our complementary quantum statistical simulations yield that the temperature and field dependence of the magnetization can be well described by an effective Heisenberg model in which the ground state configuration is composed of spin dimers, trimers, and monomers.
description: revised version
Summarized proposal of a Deuterium-Deuterium fusion reactor intended for a large power plant
Creators: name: LINDECKER, Patrick
Publisher: name: Zenodo
Year: 2024
Subjects: Fusion reactor
Nuclear energy
Deuterium-Deuterium reactor
Catalized D-D
Colliding beams
Stellarator reactor
Power plant

description: Even if a Deuterium-Deuterium (D-D) fusion reactor would be necessarily much bigger than a Deuterium-Tritium (D-T) reactor due to the much weaker fusion reactivity of the D-D fusion compared to the D-T fusion, a D-D reactor size would remain under an acceptable size. Indeed, a D-D power plant would be necessarily large and powerful, i.e. the net electric power would be preferably above 10 GWe. A D-D reactor is less complex than a D-T reactor as it is not necessary to obtain Tritium from the reactor itself. The goal of the original article is to create a physical model of the D-D reactor so as to estimate this one without the need of a simulator and finally to estimate the dimensions, power and yield of such D-D reactor for different net electrical powers. It is reminded that the Deuterium is relatively abundant on the sea water, and so it constitutes an almost inexhaustible source of energy.
Agricultural Economics: A Brief Intellectual History
Creators: name: Runge, C. Ford
name: Runge, C. Ford
Publisher: name: Unknown
Year: 2006
Subjects: Teaching/Communication/Extension/Profession

description: Agricultural economics arose in the late 19th century, combined the theory of the firm with marketing and organization theory, and developed throughout the 20th century largely as an empirical branch of general economics. The discipline was closely linked to empirical applications of mathematical statistics and made early and significant contributions to econometric methods. In the 1960's and afterward, as agricultural sectors in the OECD countries contracted, agricultural economists were drawn to the development problems of poor countries, to the trade and macroeconomic policy implications of agriculture in richer countries, and to a variety of issues in production, consumption, environmental and resource economics.
THE IMPACT OF ECONOMIC CRISIS ON LIVESTOCK INDUSTRY IN INDONESIA
Creators: name: Sudaryanto, Tahlim
name: Rusastra, I Wayan
name: Seodjana, Tjeppy D.
name: Sudaryanto, Tahlim
name: Rusastra, I Wayan
name: Seodjana, Tjeppy D.
Publisher: name: Unknown
Year: 2001
Subjects: Industrial Organization

description: This paper was presented at the INTERNATIONAL TRADE IN LIVESTOCK PRODUCTS SYMPOSIUM in Auckland, New Zealand, January 18-19, 2001. The Symposium was sponsored by: the International Agricultural Trade Research Consortium, the Venture Trust, Massey University, New Zealand, and the Centre for Applied Economics and Policy Studies, Massey University. Dietary changes, especially in developing countries, are driving a massive increase in demand for livestock products. The objective of this symposium was to examine the consequences of this phenomenon, which some have even called a "revolution." How are dietary patterns changing, and can increased demands for livestock products be satisfied from domestic resources? If so, at what cost? What will be the flow-on impacts, for example, in terms of increased demands for feedgrains and the pressures for change within marketing systems? A supply-side response has been the continued development of large-scale, urban-based industrial livestock production systems that in many cases give rise to environmental concerns. If additional imports seem required, where will they originate and what about food security in the importing regions? How might market access conditions be re-negotiated to make increased imports achievable? Other important issues discussed involved food safety, animal health and welfare and the adoption of biotechnology, and their interactions with the negotiation of reforms to domestic and trade policies. Individual papers from this conference are available on AgEcon Search. If you would like to see the complete agenda and set of papers from this conference, please visit the IATRC Symposium web page at: http://www1.umn.edu/iatrc.intro.htm
Stephan, Horst / Schmidt, Martin, Geschichte der evangelischen Theologie in Deutschland seit dem Idealismus
Creators: name: Krüger
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 22 Nr. 3 (1973): Ökumenische Rundschau, Band 22, Heft 3
CHINA'S ACCESSION TO THE WTO AND IMPACTS ON LIVESTOCK TRADE AND PRODUCTION PATTERNS
Creators: name: Gilbert, John
name: Wahl, Thomas I.
name: Gilbert, John
name: Wahl, Thomas I.
Publisher: name: Unknown
Year: 2001
Subjects: International Relations/Trade
Production Economics

description: This paper was presented at the INTERNATIONAL TRADE IN LIVESTOCK PRODUCTS SYMPOSIUM in Auckland, New Zealand, January 18-19, 2001. The Symposium was sponsored by: the International Agricultural Trade Research Consortium, the Venture Trust, Massey University, New Zealand, and the Centre for Applied Economics and Policy Studies, Massey University. Dietary changes, especially in developing countries, are driving a massive increase in demand for livestock products. The objective of this symposium was to examine the consequences of this phenomenon, which some have even called a "revolution." How are dietary patterns changing, and can increased demands for livestock products be satisfied from domestic resources? If so, at what cost? What will be the flow-on impacts, for example, in terms of increased demands for feedgrains and the pressures for change within marketing systems? A supply-side response has been the continued development of large-scale, urban-based industrial livestock production systems that in many cases give rise to environmental concerns. If additional imports seem required, where will they originate and what about food security in the importing regions? How might market access conditions be re-negotiated to make increased imports achievable? Other important issues discussed involved food safety, animal health and welfare and the adoption of biotechnology, and their interactions with the negotiation of reforms to domestic and trade policies. Individual papers from this conference are available on AgEcon Search. If you would like to see the complete agenda and set of papers from this conference, please visit the IATRC Symposium web page at: http://www1.umn.edu/iatrc.intro.htm
MODELLING DYNAMIC BEEF SUPPLY RESPONSE USING A MICROECONOMIC APPROACH: AN APPLICATION TO THE FRENCH CATTLE SECTOR
Creators: name: Benjamin, Catherine
name: Piot-Lepetit, Isabelle
name: Benjamin, Catherine
name: Piot-Lepetit, Isabelle
Publisher: name: Unknown
Year: 2001
Subjects: International Relations/Trade
Demand and Price Analysis

description: This paper was presented at the INTERNATIONAL TRADE IN LIVESTOCK PRODUCTS SYMPOSIUM in Auckland, New Zealand, January 18-19, 2001. The Symposium was sponsored by: the International Agricultural Trade Research Consortium, the Venture Trust, Massey University, New Zealand, and the Centre for Applied Economics and Policy Studies, Massey University. Dietary changes, especially in developing countries, are driving a massive increase in demand for livestock products. The objective of this symposium was to examine the consequences of this phenomenon, which some have even called a "revolution." How are dietary patterns changing, and can increased demands for livestock products be satisfied from domestic resources? If so, at what cost? What will be the flow-on impacts, for example, in terms of increased demands for feedgrains and the pressures for change within marketing systems? A supply-side response has been the continued development of large-scale, urban-based industrial livestock production systems that in many cases give rise to environmental concerns. If additional imports seem required, where will they originate and what about food security in the importing regions? How might market access conditions be re-negotiated to make increased imports achievable? Other important issues discussed involved food safety, animal health and welfare and the adoption of biotechnology, and their interactions with the negotiation of reforms to domestic and trade policies. Individual papers from this conference are available on AgEcon Search. If you would like to see the complete agenda and set of papers from this conference, please visit the IATRC Symposium web page at: http://www1.umn.edu/iatrc.intro.htm
Inclusive Breakup Cross Sections in Reactions Induced by the Nuclides $^6$He and $^{6,7}$Li in the Two-Body Cluster Model
Creators: name: Souza, L. A.
name: Chimanski, E. V.
name: Carlson, B. V.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Calculations of inclusive $α$ particle production are performed to interpret reaction experimental data induced by the two-neutron halo $^6$He and the isotopes $^{6,7}$Li on different target nuclei. We have implemented the zero-range post-form DWBA to compute the elastic and nonelastic breakup cross sections. Integrated cross sections, angular distributions and spectra are presented. Projectiles are approximated as two-body clusters, namely $^6$He as $α$+dineutron and $^{6}$Li ($^{7}$Li) interpreted as $α$+deuteron(triton). The São Paulo optical potential is employed in the calculation of the distorted wave functions for the incident channels, while standard phenomenological interactions are used for the fragment-target interactions. Calculations for $^6$Li and $^7$Li furnish a good description of the data, while the reaction involving $^6$He is found to be a complicated case, where data interpretation is still considered a major obstacle. The present analysis identifies an overall large contribution from inclusive breakup emissions for all the cases studied.
description: 12 pages, 12 figures
TRADE IN THE MARKET OF BIOTECHNOLOGICAL LIVESTOCK PRODUCTS AND THE THEORY OF THE INTERMEDIARY FIRMS
Creators: name: Haghiri, Morteza
name: Phillips, Peter W.B.
name: Haghiri, Morteza
name: Phillips, Peter W.B.
Publisher: name: Unknown
Year: 2001
Subjects: International Relations/Trade
Research and Development/Tech Change/Emerging Technologies

description: This paper was presented at the INTERNATIONAL TRADE IN LIVESTOCK PRODUCTS SYMPOSIUM in Auckland, New Zealand, January 18-19, 2001. The Symposium was sponsored by: the International Agricultural Trade Research Consortium, the Venture Trust, Massey University, New Zealand, and the Centre for Applied Economics and Policy Studies, Massey University. Dietary changes, especially in developing countries, are driving a massive increase in demand for livestock products. The objective of this symposium was to examine the consequences of this phenomenon, which some have even called a "revolution." How are dietary patterns changing, and can increased demands for livestock products be satisfied from domestic resources? If so, at what cost? What will be the flow-on impacts, for example, in terms of increased demands for feedgrains and the pressures for change within marketing systems? A supply-side response has been the continued development of large-scale, urban-based industrial livestock production systems that in many cases give rise to environmental concerns. If additional imports seem required, where will they originate and what about food security in the importing regions? How might market access conditions be re-negotiated to make increased imports achievable? Other important issues discussed involved food safety, animal health and welfare and the adoption of biotechnology, and their interactions with the negotiation of reforms to domestic and trade policies. Individual papers from this conference are available on AgEcon Search. If you would like to see the complete agenda and set of papers from this conference, please visit the IATRC Symposium web page at: http://www1.umn.edu/iatrc.intro.htm
L'archetipo del lavoro
Creators: name: Bracci, Alessandra
Publisher: name: ----
Year: 2015
Subjects: complessità, consapevolezza, olone, olarchia, analogia vitale, archetipo, lettura simbolica, “rete della vita”, or-ganismo-azienda, Kosmos produttivo, globalizzazione, economia sostenibile, ecobiopsicologia, cambiamento.

description: La pluralità degli organismi viventi che caratterizzano il contesto economico, nella loro specifica manifestazione materiale e psichica, presentano un legame coerente (ciò che avviene nell’ambiente esterno all’organismo si ri-flette nel suo «ambiente interno» e viceversa) e, il linguaggio specifico per comprendere la coerenza fra le infinite forme di sistemi viventi e il loro livello di cognizione, è dato dall’ «analogia vitale» e dal «simbolo». In tal senso, l’Ecobiopsicologia, come sviluppo delle Scienze della Complessità e in accordo con le moderne teorie evoluzio-nistiche, riconosce il ruolo centrale dell’archetipo dell’ordine nel determinare la struttura dinamica dell’unità ba-silare dei sistemi viventi e stabilisce che l’archetipo possiede una sua progettualità operante sul piano biologico e psicologico, generando un sistema vivente dotato di uno specifico livello di cognizione, in cui il livello evolutivo e progettuale, corrisponde al grado di dispiegamento delle proprie potenzialità archetipiche.
La Scienza della Complessità ha operato una rivoluzione epistemologica attraverso i concetti di holon e holar-chy (olone e olarchia) che applicati all'universo fisico e biologico hanno introdotto una visione sistemica secon-do la quale l'"intero" evolve verso stati sempre più complessi, caratterizzati da vario grado di consapevolezza. Questi concetti, ripresi da vari autori, sono stati applicati anche all'economia e alle organizzazioni aziendali, in-troducendo una lettura della circolarità dei processi e delle connessioni assai affine all'esperienza psicologica dei più recenti sviluppi della psicologia (Ecobiopsicologia). Questa nuova visione della realtà introduce la possibilità di creare un'economia sempre più aperta ad una lettura delle imprese e delle tecnologie, rispettosa delle regole sulle quali la vita stessa ha costruito i suoi paradigmi.
Scopo di questo lavoro è quello di indagare le relazioni che intercorrono fra gli archetipi e le manifestazioni con-crete di essi nell’ambito del lavoro, rintracciate nelle esperienze individuali sino ad arrivare nelle immagini della coscienza collettiva umana, per giungere alla ipotesi di una lettura ecobiopsicologica della relazione Uomo-Natura, ossia di una lettura capace di comprendere le leggi della Natura e di restituire all’essere umano la sua giusta dimora nell’universo.
description: ----, Vol 6, No 1 (2015): Issue 1 - 2015
dpcR: an R package for the analysis of digital PCR
Creators: name: Michał Burdukiewicz
name: Andrej-Nikolai Spiess
name: Schierack, Peter
name: Rödiger, Stefan
Publisher: name: F1000Research
Year: 2016

description: Motivation: The digital PCR is emerging in various research areas including life-sciences and diagnostics due to its advantages over conventional qPCR. There are different approaches to dPCR (e.g., droplets/microfluidics, nano-structured chambers) and different statistical analysis methods. However, a unified open software for which fits the needs for (I) data analysis and presentation in research, (II) as software frame-work for novel technical developments, (III) as platform for teaching this new technology and (IV) serves as reference for statistical methods to dPCR is lacking.
Results: We started the first R package, designated dpcR, as an open environment to adopt to the growing knowledge in dPCR. This cross-platform open source (GPL-2) software is freely available from the Comprehensive R Archive Network. dpcR covers peer-reviewed analysis methods and common plots in a plug-in like architecture using. We provide a standardized nomenclature for dPCR. This first release enables simulations and predictions of binomial and Poisson distributions, commonly used as theoretical models of dPCR. Further functions simulate dPCRs, perform statistical data analysis, plot results and supports report generation. Novel uncertainty calculations from peer-review literature have been introduced. Dependencies to the qpcR and shiny R packages provide means to run dpcR as interactive web application or off-line application. Due to the implementation of GUIs, the dpcR package can be used by both R novices and experts.
Conclusion: We have developed the dprR package for analysis and presentation of digital PCRs. The dpcR package can be used to build custom-made analyzers and provides structures to be openly extended by the scientific community. The next release includes functions to process data from droplets and chamber based technologies. The project is open for the scientific community to join and support the development of dpcR. We anticipate that dpcR eventually evolves as Swiss-army knife of dPCR as a valuable tool for developers, wet workers and educators.
Phantom energy traversable wormholes
Creators: name: Lobo, Francisco S. N.
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It has been suggested that a possible candidate for the present accelerated expansion of the Universe is ''phantom energy''. The latter possesses an equation of state of the form $ω\equiv p/ρ
description: 9 pages, Revtex4. V2: Considerable comments and references added, no physics changes, now 10 pages. Accepted for publication in Physical Review D
Academias CTE: Repensar o Ensino Profissional em Centros Tecnológicos Especializados com equipas multidisciplinares e financiamento de Programas Regionais Portugal 2030
Creators: name: Ribeiro, Fábio Fonseca
name: Fernandes, João
name: Castro, Filipe
name: Pinto, Cláudia
Publisher: name: Zenodo
Year: 2023
Subjects: CTE, Ensino Profissional, Ambientes de aprendizagem, Estúdios de Aprendizagem, PRR, Educação, Portugal 2030, Programas Regionais

description: Esta publicação surge na sequência do documento “Centros Tecnológicos Especializados - Espaços, mobiliário, material didático e tecnologia”, disponibilizado pelos autores gratuitamente a todas as escolas para apoiar a preparação de candidaturas à medida do PRR - Centros Tecnológicos Especializados (CTE), Investimento RE-C06-i01: Modernização da oferta e dos estabelecimentos de ensino e da formação profissional.

Como próximo passo, os autores defendem que os Programas Regionais Portugal 2030 (p.e. Programa Regional do Centro 2021-2027, pp. 205-207) oferecem uma oportunidade única para a criação de Academias CTE, uma vez que apresentam linhas de financiamento na área da educação e formação, como os Programas Intermunicipais de Promoção do Sucesso Educativo (semelhantes de certa forma aos Planos Integrados e Inovadores de Combate ao Insucesso Escolar do anterior Programa Portugal 2020).

Estes mecanismos tornam possível aos municípios assumir um papel de catalisadores de inovação educativa (Ribeiro & Fernandes, 2021), em articulação com as escolas, centros de formação de professores e tecido empresarial contratando, apoiando e desenvolvendo profissionalmente equipas multidisciplinares especializadas, estabelecendo parcerias locais relevantes, e através do envolvimento de especialistas e novos modos de organização, gestão escolar e monitorização de resultados, incentivar o desenvolvimento curricular autêntico, transformador da escola e do território. Só assim será possível rentabilizar o investimento em infraestrutura dos CTE e torná-lo num processo de transformação educativa ajustado às necessidades locais.

Assim, pressupondo uma reflexão conjunta entre Comunidades intermunicipais, Municípios e Escolas sobre o que pode ser uma Academia CTE no seu contexto específico, apresenta-se informação útil para a preparação de uma candidatura a financiamento aos Programas Regionais Portugal 2030.