cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Prehistoric economies during the Late Woodland period of the Potomac Valley: An examination of animal resource utilization
Creators: name: Moore, Elizabeth Ann
Publisher: name: ProQuest
Year: 2023
Subjects: classificationCode: 43
subject: History, heritage and archaeology
classificationCode: 4301
subject: Archaeology

description: This research describes differences in the prehistoric economies of two Late Woodland archaeological cultures, the Montgomery Complex and the Luray Focus, and examines the relationship between these differences and other sociocultural factors. Zooarchaeological data used to perform this examination were collected from six sites. The relative completeness and research utility of all assemblages was determined. Other artifact classes and site features were described to provide a more complete view of these sites. The zooarchaeological data was used to define four key aspects of hunting strategies--the diversity of vertebrate taxa exploited, the habitats which were exploited to acquire those taxa, the exploitation of seasonally available resources, and the techniques used to hunt deer. At the sites from the Montgomery Complex, a wide variety of taxa were hunted or collected from all of the surrounding habitats. Deer were hunted with a specific strategy at the Rosenstock site, a strategy that resulted in the killing of the age groups that were of maximum meat-yielding age and size. Seasonally abundant resources were targeted for exploitation as they became available. As an overall pattern, the occupants of the Montgomery Complex sites appear to have been maximizing the exploitation of many of the animal resources found in the area. The hunting strategies at sites from the Luray Focus contrast to those from the Montgomery Complex in several ways. First, only a limited number of animal taxa were being hunted or collected. These taxa were probably found in the gardens or garden borders. Second, the seasonally available resources in the area were not targeted for maximum exploitation. The presence of seasonally available resources in the assemblages is marginal and their collection was probably opportune and not necessarily part of a deliberate strategy to exploit those particular taxa. Several sociocultural factors that may be related to these differences in hunting strategies are examined. These factors include a possible increase in the dependence upon cultivars, an increase in the use of defensive fortifications, and differences in stalking techniques for deer hunting. Finally, the implications of the relationship between these factors and the differences in the overall economies as reflected in the hunting strategies are discussed.
Quantizing Lévy flights
Creators: name: Mulder, Ruward A.
name: Caracanhas, Mônica. A.
name: Smith, Cristiane Morais
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: The Caldeira-Leggett model of quantum Brownian motion is generalized using a generic velocity-dependent coupling. That leads to the description of a set of models able to capture Markovian and non-Markovian versions of Brownian and Lévy statistics, depending on the functional form of the coupling and on the spectral function of the reservoir. One specific coupling force is found that establishes a connection with Lévy statistics of cold atoms in \textit{Sisyphus} laser cooling. In the low-velocity limit, this also gives rise to additional inertia of the Brownian particle, reproducing the Abraham-Lorentz equation from first principles for a superohmic bath. Through path-integral quantization in Euclidean time, the environment is integrated out, leaving a set of non-local effective actions. These results further serve as starting points for several numerical calculations, particularly decoherence properties of non-ohmic baths.
description: 9 pages main text, 3 figures, 4 pages Sup. Mat
Phase diagram of the half-filled two-dimensional SU(N) Hubbard-Heisenberg model: a quantum Monte Carlo study
Creators: name: Assaad, F. F.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We investigate the phase diagram of the half-filled SU(N) Hubbard-Heisenberg model with hopping t, exchange J and Hubbard U, on a square lattice. In the large-N limit, and as a function of decreasing values of t/J, the model shows a transition from a d-density wave state to a spin dimerized insulator. A similar behavior is observed at N=6 whereas at N=2 a spin density wave insulating ground state is stabilized. The N=4 model, has a d-density wave ground state at large values of t/J which as a function of decreasing values of t/J becomes unstable to an insulating state with no apparent lattice and spin broken symmetries. In this state, the staggered spin-spin correlations decay as a power-law,resulting in gapless spin excitations at q = (pi,pi). Furthermore, low lying spin modes with small spectral weight are apparent around the wave vectors q = (0,pi) and q = (pi,0). This gapless spin liquid state is equally found in the SU(4) Heisenberg model in the self-adjoint antisymmetric representation. An interpretation of this state in terms of a pi-flux phase is offered. Our results stem from projective (T=0) quantum Monte-Carlo simulations on lattice sizes ranging up to 24 X 24.
description: 10 pages, 12 figures
Statistical theory of cumulant mapping in an imperfect apparatus
Creators: name: Patchkovskii, S.
name: Mikosch, J.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Cumulant mapping has been recently suggested [Frasinski, Phys. Chem. Chem. Phys. 24, 207767 (2022)] as an efficient approach to observing multi-particle fragmentation pathways, while bypassing the restrictions of the usual coincidence-measurement approach. We present a formal analysis of the cumulant-mapping technique in the presence of moderate external noise, which induces spurious correlations between the fragments. Suppression of false-cumulant signal may impose severe restrictions on the stability of the experimental setup and/or the permissible average event rate, which increase with the cumulant order. We demonstrate that cumulant mapping in an imperfect apparatus remains competitive for dominant processes and for pathways with a background-free marker fragment. We further show that the false-cumulant contributions increase faster than linearly with the average event rate, providing a simple test for the experimental data analysis.
Calliopsis (Calliopsis) empelia Shinn 1967
Creators: name: Pedro, Diego De
name: Ceccarelli, Fadia Sara
name: Sagot, Philippe
name: López-Reyes, Eulogio
name: Mullins, Jessica L.
name: Mérida-Rivas, Jorge A.
name: Falcon-Brindis, Armando
name: Griswold, Terry
name: Ascher, John S.
name: Gardner, Joel
name: Ayala, Ricardo
name: Vides-Borrell, Eric
name: Vandame, Rémy
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Andrenidae
Calliopsis
Calliopsis empelia

description: Calliopsis (Calliopsis) empelia Shinn, 1967 *
[Holotype: CASC; ♂ Mt. Lemmon Road, Mt. Lemmon at 1067 mts, Arizona, US; August 15, 1954]
The CARCIB team collected Calliopsis empelia, which is a new species record for the BCP. Two males were collected at the Magdalena Plains in May 2017, and January 2019. See fig. 25.
description: Published as part of Pedro, Diego De, Ceccarelli, Fadia Sara, Sagot, Philippe, López-Reyes, Eulogio, Mullins, Jessica L., Mérida-Rivas, Jorge A., Falcon-Brindis, Armando, Griswold, Terry, Ascher, John S., Gardner, Joel, Ayala, Ricardo, Vides-Borrell, Eric & Vandame, Rémy, 2024, Revealing the Baja California Peninsula's Hidden Treasures: An Annotated checklist of the native bees (Hymenoptera: Apoidea: Anthophila), pp. 1-391 in Zootaxa 5522 (1) on page 72, DOI: 10.11646/zootaxa.5522.1.1, http://zenodo.org/record/13920532
Local organizations as terrains of struggle: Dysfunction as resistance in the cooperatives of the Republic of Niger
Creators: name: Borden, Therese Anne
Publisher: name: American University
Year: 2023

description: Despite the recent renewal of interest and new scholarship on the role of local organizations in the development process, long-standing "dysfunctional" local organizations are still poorly understood. Functionalist organization theory which dominates the literature does not adequately explain cases such as the agricultural cooperatives of Niger, a state-run network of local organizations which have repeatedly failed to meet rural development objectives set by the government. The premise of this study is that some local organization dysfunction, such as that in the Niger case, are not products of poor planning or training but a manifestation of the conflict between the state and rural producers. Peasant behavior is interpreted as resistance to state initiatives. In Niger, the long-term deterioration of farming conditions and the ill-conceived "Green Revolution" development strategy have compelled rural producers to reject official state initiatives. The cooperatives, channels through which agricultural credit, farm inputs and equipment are made available to members have become arenas of struggle between rural producers and the state. The widespread knowledge of alternative use of cooperative resources and cooperation among diverse social groups, it is argued here, is evidence that dysfunction in the cooperatives is not anti-social or criminal behavior but resistance. Members obtain program benefits through the cooperatives and often use them not to improve farm productivity but to construct an alternative development strategy--the development of the petty commodity sector, commerce and services sector. These hypotheses were tested by (a) a review of historical data on peasant-state relations, (b) a review of the data on contemporary farming conditions, and (c) an analysis of household survey data collected in Niger by the Ohio State University Department of Agricultural Economics and Rural Sociology Rural Finance Program in 1986. The conclusions reached were, first, that farming conditions have deteriorated and farmers foresee a general decline of the agricultural sector for the future. Second, contemporary cooperatives were developed on the foundation of a network of local organizations created during the colonial era. The extreme unpopularity of those antecedents and the long-standing alienation between rural producers and the state undermined the legitimacy of both the cooperatives and their programs in the eyes of the peasants. Third, evidence of collaboration between diverse social groups--landless peasants, religious figures, local chiefs, better-off farmers--indicated that the misuse of cooperative resources was carried out with a degree of community consensus and therefore could be interpreted as resistance to the state. Fourth, the data showed that the cooperative program benefits were not being used primarily for raising farm productivity but to supplement off-farm occupations or were sold to generate cash income.
War as a social trap: The case of Tanzania
Creators: name: Francis, Joyce L.
Publisher: name: American University
Year: 2023

description: War can entrap the victor as well as the vanquished. Tanzania's victory over Uganda in 1979 was quick and decisive, and it was won with surprisingly few battle deaths. Yet, for Tanzanians it proved a Pyrrhic victory. Despite the defeat of Amin's forces and a two-year occupation, chaos continued in Uganda. The war and occupation caused unintended consequences that were far more costly for Tanzania--politically, socially and economically--than anyone anticipated. An analysis of this war and its consequences permits a theoretical and policy-grounded examination of the efficacy of war as an instrument of public policy and conflict resolution. The disparity between the anticipated and actual outcomes of this war is explained through the depiction of war as a social trap--a set of circumstances in the decision environment that distorts the decision maker's utility calculations, creating a false picture of the probable outcomes of alternate courses of action, thereby leading the decision maker to chose a course of action contrary to her/his self interest. To the extent that leaders who initiate war are acting within a social trap, their ability to anticipate outcomes is distorted. This calls into question war's efficacy both as an instrument of public policy and as a means of resolving conflict.
War as a social trap: The case of Tanzania
Creators: name: Francis, Joyce L.
Publisher: name: ProQuest
Year: 2023
Subjects: classificationCode: 44
subject: Human society
classificationCode: 4408
subject: Political science
subject: FOS: Political science

description: War can entrap the victor as well as the vanquished. Tanzania's victory over Uganda in 1979 was quick and decisive, and it was won with surprisingly few battle deaths. Yet, for Tanzanians it proved a Pyrrhic victory. Despite the defeat of Amin's forces and a two-year occupation, chaos continued in Uganda. The war and occupation caused unintended consequences that were far more costly for Tanzania--politically, socially and economically--than anyone anticipated. An analysis of this war and its consequences permits a theoretical and policy-grounded examination of the efficacy of war as an instrument of public policy and conflict resolution. The disparity between the anticipated and actual outcomes of this war is explained through the depiction of war as a social trap--a set of circumstances in the decision environment that distorts the decision maker's utility calculations, creating a false picture of the probable outcomes of alternate courses of action, thereby leading the decision maker to chose a course of action contrary to her/his self interest. To the extent that leaders who initiate war are acting within a social trap, their ability to anticipate outcomes is distorted. This calls into question war's efficacy both as an instrument of public policy and as a means of resolving conflict.
Price Discovery and Integration in U.S. Pecan Markets
Creators: name: Kim, Youngho
name: Dharmasena, Senarath
name: Kim, Youngho
name: Dharmasena, Senarath
Publisher: name: Unknown
Year: 2018
Subjects: subject: Agricultural and Food Policy
subject: Food Consumption/Nutrition/Food Safety
subject: Food Security and Poverty
subject: directed acyclic graphs
subject: machine learning
subject: market integration
subject: pecan markets
subject: price discovery

description: The United States is a major supplier in the world pecan market. Using grower-level pecan price data from the 2005–2016 seasons, we estimate pecan market integration patterns among Texas, Oklahoma, Georgia, and Louisiana using causality structures identified through cutting-edge machine-learning methods. Current pecan price received by growers in Texas is a direct cause of those in Oklahoma, Georgia, and Louisiana. Past-period grower-level pecan price in Georgia either directly or indirectly influences the current price in other states. These findings are useful for businesses and the government in order to price and promote marketing of pecan.
Quantum four-body system in D dimensions
Creators: name: Gu, Xiao-Yan
name: Ma, Zhong-Qi
name: Sun, Jian-Qiang
Publisher: name: arXiv
Year: 2003
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: By the method of generalized spherical harmonic polynomials, the Schrödinger equation for a four-body system in $D$-dimensional space is reduced to the generalized radial equations where only six internal variables are involved. The problem on separating the rotational degrees of freedom from the internal ones for a quantum $N$-body system in $D$ dimensions is generally discussed.
description: 19 pages, no figure, RevTex, Submitted to J. Math. Phys
Rack Force Estimation for Driving on Uneven Road Surfaces
Creators: name: Bhardwaj, Akshay
name: Slavin, Daniel
name: Walsh, John
name: Freudenberg, James
name: Gillespie, R. Brent
Publisher: name: arXiv
Year: 2020
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The force transmitted from the front tires and tie rods to the steering rack of a vehicle, called the rack force, significantly influences the torque experienced by a driver at the steering wheel. As a result, estimates of rack force are used in a wide variety of advanced driver assist systems. Existing methods for producing rack force estimates are either susceptible to steering system disturbances or are only applicable for driving on roads with low frequency profile variations such as road slopes. In this paper we present a model that can produce disturbance-free rack force estimates for driving on roads with high frequency profile variations, such as road cleats and potholes, in addition to roads with low frequency profile variations. We validate the estimation accuracy of our model by presenting results from two driving experiments that were performed on test tracks with known low and high frequency road profile variations. We further demonstrate the merits of our model relative to the existing models by comparing the various estimates to rack force measurements obtained using a sensor mounted in the test vehicle.
description: Accepted to 2020 IFAC World Congress
Initial state of the recombining plasma in supernova remnant W 28
Creators: name: Himono, Rui
name: Nobukawa, Masayoshi
name: Yamauchi, Shigeo
name: Nobukawa, Kumiko K.
name: Suzuki, Nari
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We investigate an SNR W28 with the Suzaku archive data and report the results of spatial resolved analyses. We carry out spectral analysis using a recombining plasma (RP) model with an element-dependent initial ionization temperature, and obtain the ionization temperatures to be $\sim0.5$~keV for Ne, $\sim0.7$~keV for Mg, $\sim1.0$~keV for Si, $\sim1.2$~keV for S, $\sim1.4$~keV for Ar, $\sim1.7$~keV for Ca, and $\sim0.7$~keV for Fe in the RP-initial phase. In addition to northeast regions where RP have been reported, we find that the ionization temperature in the southeast and southwest regions show a similar trend to the central region, in the RP-initial phase. Furthermore, the elapsed time from the RP-initial phase to present is shorter, $\sim300$~yr in the central region and longer, $\sim10^3$-$10^4$~yr in the outside regions. Our results cannot be explained by simple scenarios of thermal conduction due to molecular clouds or adiabatic cooling (rarefaction), and indicate that more complex mechanism or other scenarios are required. Also, we estimate the ejecta mass $\gtrsim14M_{\odot}$, which indicates a SNR derived a massive star.
description: 11 pages, 5 figures. Published in PASJ
A comparison of mathematics courses and achievement of male and female students and how they affect the students' rewards in the labor market
Creators: name: McShea, Maureen
Publisher: name: American University
Year: 2023

description: Mathematics is the key to opportunity. Lucy Sells (1978), an American sociologist, expressed the situation well when she said that "mathematics is a critical filter" (p. 28). Without adequate preparation in mathematics, people are effectively filtered out of most postsecondary education options and an increasing number of career opportunities. Career advancement is severely hindered by a lack of mathematical training. More females than males fail to achieve their full potential in mathematics. This is one of the most serious inequities that currently exists in education. Without mathematical knowledge and skills in the technological society of today, women will never be able to achieve equity in the labor market (Fennema, 1991). Because of these concerns, a study was proposed that would investigate the effect that mathematics course taking patterns in high school and college had on the income of females. The study further examines the effect that mathematics has on educational attainment, high school grades, high school program, socioeconomic status, race, achievement tests and occupation. The data utilized in this study was collected by the U.S. Dept. of Education, Center for Education Statistics. The study sample, High School and Beyond (HSB) Class of 1980, included over 28,000 seniors enrolled in 1,105 public and private high schools across the country. Study findings showed that there was a significant relationship between the level of female HSB students' high school and college mathematics participation and level of achievement, college program, occupation and career choice and level of income earned. The performance level of females in the study consistently lagged behind males in the majority of areas observed in the study. The findings of the study showed that, although females did indeed not perform as well as their male counterparts in most areas, as the participation rates increased for females taking a high number of courses in high school mathematics (greater than three) and a high number of credits of college mathematics (greater than 16), the disparity between males and females decreased.
Position Dependence of Charge Collection in Prototype Sensors for the CMS Pixel Detector
Creators: name: Rohe, T.
name: Bortoletto, D.
name: Chiochia, V.
name: Cremaldi, L. M.
name: Cucciarelli, S.
name: Dorokhov, A.
name: Konecki, M.
name: Prokofiev, K.
name: Regenfus, C.
name: Sanders, D. A.
name: Son, S.
name: Speer, T.
name: Swartz, M.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: This paper reports on the sensor R&D activity for the CMS pixel detector. Devices featuring several design and technology options have been irradiated up to a proton fluencec of 1E15 n_eq/cm**2 at the CERN PS. Afterward they were bump bonded to unirradiated readout chips and tested using high energy pions in the H2 beam line of the CERN SPS. The readout chip allows a non zero suppressed full analogue readout and therefore a good characterization of the sensors in terms of noise and charge collection properties. The position dependence of signal is presented and the differences between the two sensor options are discussed.
description: Contribution to the IEEE-NSS Oct. 2003, Portland, OR, USA, submitted to IEEE-TNS 7 pages, 8 figures, 1 table. Revised, title changed
A comparison of mathematics courses and achievement of male and female students and how they affect the students' rewards in the labor market
Creators: name: McShea, Maureen
Publisher: name: ProQuest
Year: 2023
Subjects: classificationCode: 39
subject: Education
classificationCode: 3901
subject: Curriculum and pedagogy

description: Mathematics is the key to opportunity. Lucy Sells (1978), an American sociologist, expressed the situation well when she said that "mathematics is a critical filter" (p. 28). Without adequate preparation in mathematics, people are effectively filtered out of most postsecondary education options and an increasing number of career opportunities. Career advancement is severely hindered by a lack of mathematical training. More females than males fail to achieve their full potential in mathematics. This is one of the most serious inequities that currently exists in education. Without mathematical knowledge and skills in the technological society of today, women will never be able to achieve equity in the labor market (Fennema, 1991). Because of these concerns, a study was proposed that would investigate the effect that mathematics course taking patterns in high school and college had on the income of females. The study further examines the effect that mathematics has on educational attainment, high school grades, high school program, socioeconomic status, race, achievement tests and occupation. The data utilized in this study was collected by the U.S. Dept. of Education, Center for Education Statistics. The study sample, High School and Beyond (HSB) Class of 1980, included over 28,000 seniors enrolled in 1,105 public and private high schools across the country. Study findings showed that there was a significant relationship between the level of female HSB students' high school and college mathematics participation and level of achievement, college program, occupation and career choice and level of income earned. The performance level of females in the study consistently lagged behind males in the majority of areas observed in the study. The findings of the study showed that, although females did indeed not perform as well as their male counterparts in most areas, as the participation rates increased for females taking a high number of courses in high school mathematics (greater than three) and a high number of credits of college mathematics (greater than 16), the disparity between males and females decreased.
On the thresholds, probability densities, and critical exponents of Bak-Sneppen-like models
Creators: name: Garcia, Guilherme J. M.
name: Dickman, Ronald
Publisher: name: arXiv
Year: 2004
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We report a simple method to accurately determine the threshold and the exponent $ν$ of the Bak-Sneppen model and also investigate the BS universality class. For the random-neighbor version of the BS model, we find the threshold $x^*=0.33332(3)$, in agreement with the exact result $x^*=1/3$ given by mean-field theory. For the one-dimensional original model, we find $x^*=0.6672(2)$ in good agreement with the results reported in the literature; for the anisotropic BS model we obtain $x^*=0.7240(1)$. We study the finite size effect $x^*(L)-x^*(L \to \infty) \propto L^{-ν}$, observed in a system with $L$ sites, and find $ν= 1.00(1)$ for the random-neighbor version, $ν= 1.40(1)$ for the original model, and $ν=1.58(1)$ for the anisotropic case. Finally, we discuss the effect of defining the extremal site as the one which minimizes a general function $f(x)$, instead of simply $f(x)=x$ as in the original updating rule. We emphasize that models with extremal dynamics have singular stationary probability distributions $p(x)$. Our simulations indicate the existence of two symmetry-based universality classes.
description: 8 pages, 3 figures
The Smooth Forcing Extension Method: A High-Order Technique for Solving Elliptic Equations on Complex Domains
Creators: name: Qadeer, Saad
name: Griffith, Boyce E.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: High-order numerical methods for solving elliptic equations over arbitrary domains typically require specialized machinery, such as high-quality conforming grids for finite elements method, and quadrature rules for boundary integral methods. These tools make it difficult to apply these techniques to higher dimensions. In contrast, fixed Cartesian grid methods, such as the immersed boundary (IB) method, are easy to apply and generalize, but typically are low-order accurate. In this study, we introduce the Smooth Forcing Extension (SFE) method, a fixed Cartesian grid technique that builds on the insights of the IB method, and allows one to obtain arbitrary orders of accuracy. Our approach relies on a novel Fourier continuation method to compute extensions of the inhomogeneous terms to any desired regularity. This is combined with the highly accurate Non-Uniform Fast Fourier Transform for interpolation operations to yield a fast and robust method. Numerical tests confirm that the technique performs precisely as expected on one-dimensional test problems. In higher dimensions, the performance is even better, in some cases yielding sub-geometric convergence. We also demonstrate how this technique can be applied to solving parabolic problems and for computing the eigenvalues of elliptic operators on general domains, in the process illustrating its stability and amenability to generalization.
Supporting Information for a Manuscript: Co-Activation Pattern Alterations in Autism Spectrum Disorders - A Volume-Wise Hierarchical Clustering fMRI Study
Creators: name: Paakki, Jyri-Johan
name: Rahko, Jukka S.
name: Kotila, Aija
name: Mattila, Marja-Leena
name: Miettunen, Helena
name: Hurtig, Tuula
name: Jussila, Katja
name: Kuusikko-Gauffin, Sanna
name: Moilanen, Irma
name: Tervonen, Osmo
name: Kiviniemi, Vesa
Publisher: name: Zenodo
Year: 2021
Subjects: adolescent
autism spectrum disorder
brain
CAP
fMRI
hierarchical clustering
resting state network

description: Supporting Information for a Manuscript: Co-Activation Pattern Alterations in Autism Spectrum Disorders - A Volume-Wise Hierarchical Clustering fMRI Study. Table S1. FDR corrected (q < 0.05) FSL randomise cluster results table for each CAP.
description: A link to the article will be added when it is published.
The Spatial and Temporal Diffusion of Agricultural Land Prices
Creators: name: Yang, Xinyue
name: Odening, Martin
name: Ritter, Matthias
name: Yang, Xinyue
name: Odening, Martin
name: Ritter, Matthias
Publisher: name: Unknown
Year: 2018
Subjects: subject: Agricultural and Food Policy
subject: Agricultural Finance
subject: Land Economics/Use
subject: Agricultural land markets
subject: price diffusion
subject: spatial dependence
subject: ripple effect

description: In the last decade, many parts of the world experienced severe increases in agricultural land prices. This price surge, however, did not take place evenly in space and time. To better understand the spatial and temporal behavior of land prices, we employ a price diffusion model that combines features of market integration models and spatial econometric models. An application of this model to farmland prices in Germany shows that prices on a county-level are cointegrated. Apart from convergence towards a long-run equilibrium, we find that price transmission also proceeds through short-term adjustments caused by neighboring regions.
description: FORLand Working Papers are published by the DFG research unit FOR 2569 "Agricultural Land Markets - Efficiency and Regulation". The series comprises papers from research group members as well as from external authors with a focus on agricultural land markets. Editor: Martin Odening, contact: gabriele.wuerth@agrar.hu-berlin.de
Calliopsis (Calliopsis) peninsularis Shinn 1967
Creators: name: Pedro, Diego De
name: Ceccarelli, Fadia Sara
name: Sagot, Philippe
name: López-Reyes, Eulogio
name: Mullins, Jessica L.
name: Mérida-Rivas, Jorge A.
name: Falcon-Brindis, Armando
name: Griswold, Terry
name: Ascher, John S.
name: Gardner, Joel
name: Ayala, Ricardo
name: Vides-Borrell, Eric
name: Vandame, Rémy
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Andrenidae
Calliopsis
Calliopsis peninsularis

description: Calliopsis (Calliopsis) peninsularis Shinn, 1967
Endemic
[Holotype: CASC; ♀ San Ignacio (24.14 km N.), Baja California Sur, Mexico; September 29, 1941]
As the specific epithet suggests, this species is endemic to the BCP and is found in the Central Desert north of San Ignacio BCS (Shinn 1967). See fig. 25.
description: Published as part of Pedro, Diego De, Ceccarelli, Fadia Sara, Sagot, Philippe, López-Reyes, Eulogio, Mullins, Jessica L., Mérida-Rivas, Jorge A., Falcon-Brindis, Armando, Griswold, Terry, Ascher, John S., Gardner, Joel, Ayala, Ricardo, Vides-Borrell, Eric & Vandame, Rémy, 2024, Revealing the Baja California Peninsula's Hidden Treasures: An Annotated checklist of the native bees (Hymenoptera: Apoidea: Anthophila), pp. 1-391 in Zootaxa 5522 (1) on page 73, DOI: 10.11646/zootaxa.5522.1.1, http://zenodo.org/record/13920532
title: DISTRIBUTION OF PLASTIC DEFORMATION ALONG THE PERIMETER OF CIRCULAR SPECIMEN OF THIN-WALL FUEL-ELEMENT CLADDING DURING ITS EXPANSION
Creators: name: Karagergi, R.P.
name: Evseev, M.V.
name: Kozlov, A.V.
Publisher: name: Peter the Great St. Petersburg Polytechnic University
Year: 2021

description: The method of measuring short-time mechanical properties of materials of cladding tubes during the process of expansion of circular specimens is conventional in reactor material science. One of the method limitations is procedure errors caused by the specimen bending on the semicylindrical supports at the initial stage of expansion. The bending induces inhomogeneous plastic deformation of the specimen working parts, which results in the inaccurate evaluation of the yield strength and the plastic properties of the material. This paper contains an analysis of the plastic strain distribution at the different stages of the expansion of the circular specimens of a cladding tube made of austenite steel. The results of the comparison between the true relative deformation and the estimated deformation of the working part are presented together with the assessment of the impact of strain hardening of the material on its mechanical properties.
Farmland Values and Bidder Behavior in First-Price Land Auctions
Creators: name: Croonenbroeck, Carsten
name: Odening, Martin
name: Hüttel, Silke
name: Croonenbroeck, Carsten
name: Odening, Martin
name: Hüttel, Silke
Publisher: name: Unknown
Year: 2018
Subjects: subject: Agricultural and Food Policy
subject: Agricultural Finance
subject: Land Economics/Use
subject: First-Price Sealed Bid Land Auctions
subject: Structural Estimation
subject: Buyer Heterogeneity

description: Within this paper, we aim to investigate asymmetries among bidders in land auctions that may entail non-competitive prices. Using representative data for Eastern Germany including winning bids, bidder characteristics, and land amenities, we pursue a structural approach to derive distributions of latent land values for different bidder groups. By applying nonparametric techniques, we cannot find evidence for asymmetric bidder structures while differentiating between legal entities, tenancy status, and nationality of bidders. Our findings challenge the hypothesis that land privatization via auctions discriminates against certain buyer groups—an argument that is often used to justify stricter regulation of agricultural land markets.
description: FORLand Working Papers are published by the DFG research unit FOR 2569 "Agricultural Land Markets - Efficiency and Regulation". The series comprises papers from research group members as well as from external authors with a focus on agricultural land markets. Editor: Martin Odening, contact: gabriele.wuerth@agrar.hu-berlin.de
Random model for RNA interference yields scale free network
Creators: name: Balcan, Duygu
name: Erzan, Ayse
Publisher: name: arXiv
Year: 2003
Subjects: subject: Genomics (q-bio.GN)
subject: FOS: Biological sciences

description: We introduce a random bit-string model of post-transcriptional genetic regulation based on sequence matching. The model spontaneously yields a scale free network with power law scaling with $ γ=-1$ and also exhibits log-periodic behaviour. The in-degree distribution is much narrower, and exhibits a pronounced peak followed by a Gaussian distribution. The network is of the smallest world type, with the average minimum path length independent of the size of the network, as long as the network consists of one giant cluster. The percolation threshold depends on the system size.
description: 9 pages, 13 figures, submitted to Midterm Conference COSIN on ``Growing Networks and Graphs in Statistical Physics, Finance, Biology and Social Systems'', Rome, 1-5 September 2003
Land price diffusion across borders: The case of Germany
Creators: name: Grau, Aaron
name: Odening, Martin
name: Ritter, Matthias
name: Grau, Aaron
name: Odening, Martin
name: Ritter, Matthias
Publisher: name: Unknown
Year: 2018
Subjects: subject: Agricultural Finance
subject: Land Economics/Use
subject: Agricultural land markets
subject: price diffusion
subject: spatial dependence
subject: border effect

description: Land market regulations are often justified by the assumption that activities of foreign and nonagricultural investors drive up land prices in countries with low land price levels. However, empirical knowledge about the dynamics of agricultural land prices across borders is sparse. Using the German reunification as a natural experiment, we study the effect of the former inner German border on the dynamics of agricultural land prices in East and West Germany. We apply a land price diffusion model with an error correction specification that estimates to what extent agricultural land markets are spatially integrated. A novel feature of our model is its ability to distinguish price diffusion within states and across state borders. We find that local agricultural land markets in Germany are linked by a long-run equilibrium relationship. Spatial market integration, however, does not hold among all counties in our study area. Regarding our main research question, we provide evidence for a persistent border effect given that the fraction of spatially integrated counties is larger within states than across the former border. Moreover, we observe non-significant error correction terms for many counties along the former border. From a policy perspective, it is striking to realize that even 25 years after German reunification, pronounced land price differences persist. It is quite likely that price diffusion through existing borders within the EU would take even more time given language barriers, different administrative procedures for land acquisitions, different tax systems, and information asymmetries between domestic and foreign market participants.
description: FORLand Working Papers are published by the DFG research unit FOR 2569 "Agricultural Land Markets - Efficiency and Regulation". The series comprises papers from research group members as well as from external authors with a focus on agricultural land markets. Editor: Martin Odening, contact: gabriele.wuerth@agrar.hu-berlin.de
Effective theories of scattering with an attractive inverse-square potential and the three-body problem
Creators: name: Barford, Thomas
name: Birse, Michael C.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A distorted-wave version of the renormalisation group is applied to scattering by an inverse-square potential and to three-body systems. In attractive three-body systems, the short-distance wave function satisfies a Schroedinger equation with an attractive inverse-square potential, as shown by Efimov. The resulting oscillatory behaviour controls the renormalisation of the three-body interactions, with the renormalisation-group flow tending to a limit cycle as the cut-off is lowered. The approach used here leads to single-valued potentials with discontinuities as the bound states are cut off. The perturbations around the cycle start with a marginal term whose effect is simply to change the phase of the short-distance oscillations, or the self-adjoint extension of the singular Hamiltonian. The full power counting in terms of the energy and two-body scattering length is constructed for short-range three-body forces.
description: 19 pages (RevTeX), 2 figures
Vállalati-vállalkozási kapcsolatok és együttműködések az élelmiszer-gazdaságban (elméleti megközelítés, fogalmi tisztázás)
Corporate-Business Relations and Cooperation in the Food Industry (Theoretical Approach, Conceptual Clarification)
Creators: name: Nábrádi, András
name: Nábrádi, András
Publisher: name: Unknown
Year: 2018
Subjects: subject: Production Economics
subject: Productivity Analysis
subject: vállalati együttműködések
subject: csoportosítás
subject: definíciók
subject: corporate collaborations
subject: groupings
subject: definitions

description: A tanulmány a vállalatok és vállalkozások közötti kapcsolatokról szól. Kifejezetten összpontosít az együttműködésekre, azokra, amelyek a XXI. század első két dekádjában fellelhetők Magyarországon és a világban. Irodalmi forrásokra alapozva csoportokba foglalja az együttműködés kategóriáit, rendszerezi azokat több szempont szerint, és amilyen mértékben lehetséges, koncentrál az élelmiszer-gazdaság kapcsolódó területeire is. A tanulmány az együttműködéseket tíz csoportosítási elv szerint rendszerezi. Amiatt, hogy ezt a későbbiekben egységesen kezelhessük, az együttműködések típusai, a fontosabbnak ítélt csoportosítások mellett az elnevezések is definiálásra kerülnek. Minden magyar fogalomhoz párosításra került annak angol megfelelője. A tanulmány gazdálkodástudományi orientációjú. Azzal (is) foglalkozik, hogy az együttműködések különböző típusai milyen előnyöket jelenthetnek a partnerek számára. Jogi, szociológiai, politikai átfedések, valamint stratégiai összefüggések is előfordulnak a csoportosítások során, de ezek definícióival a dolgozat nem foglalkozik. A témában a szerző szívesen fogadja a kiegészítő, építő vagy kritikai véleményeket a témakör még teljesebb tisztázása érdekében. A tanulmány összegzésében a jövő elvárásaival összefüggő kutatási területeket is felvet. = The study deals with the relationships between companies. It focuses specifically on collaborations, those that can be found in Hungary and all over the world in the first two decades of the 21st century. Based on literature sources, it defines different co-operation categories, organises them according to various criteria and focuses on related areas of the food industry. Using matching approaches, it defines the range of non-eliminating factors. Based on that, 24 definitions of relationships are formulated and clarified. The study is applied economics oriented. It also deals with the benefits of the various types of co-operation for partners. Legal, sociological and political overlaps, and strategic contexts occur during groupings, but their definitions are not dealt with in this article. Finally, the study raises research areas of future expectations.
Calliopsis (Calliopsis) rhodophila Cockerell 1897
Creators: name: Pedro, Diego De
name: Ceccarelli, Fadia Sara
name: Sagot, Philippe
name: López-Reyes, Eulogio
name: Mullins, Jessica L.
name: Mérida-Rivas, Jorge A.
name: Falcon-Brindis, Armando
name: Griswold, Terry
name: Ascher, John S.
name: Gardner, Joel
name: Ayala, Ricardo
name: Vides-Borrell, Eric
name: Vandame, Rémy
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Andrenidae
Calliopsis
Calliopsis rhodophila

description: Calliopsis (Calliopsis) rhodophila Cockerell, 1897 *
[Holotype: USNM (3701): ♂ Santa Fe, New Mexico, US; July 27, 1984?]
Calliopsis rhodophila is a new record for the BCP. The BBPT collected specimens in Valle de Guadalupe in the Coastal Sage Matorral in June 2020 (MABC). See fig. 26.
description: Published as part of Pedro, Diego De, Ceccarelli, Fadia Sara, Sagot, Philippe, López-Reyes, Eulogio, Mullins, Jessica L., Mérida-Rivas, Jorge A., Falcon-Brindis, Armando, Griswold, Terry, Ascher, John S., Gardner, Joel, Ayala, Ricardo, Vides-Borrell, Eric & Vandame, Rémy, 2024, Revealing the Baja California Peninsula's Hidden Treasures: An Annotated checklist of the native bees (Hymenoptera: Apoidea: Anthophila), pp. 1-391 in Zootaxa 5522 (1) on page 73, DOI: 10.11646/zootaxa.5522.1.1, http://zenodo.org/record/13920532
A XXI. század világgazdasági eseményeinek hatása az Európai Unió integrációs folyamataira és a mezőgazdasági munkamegosztásra
The Impact of the World Economic Events of the 21st Century on the Integration Processes of the European Union and the Division of Agricultural Labour
Creators: name: Szabó, Barna
name: Szabó, Barna
Publisher: name: Unknown
Year: 2018
Subjects: subject: Production Economics
subject: Productivity Analysis
subject: regionális integráció
subject: dezintegrációs tényezők
subject: nemzetgazdasági fejlettségkülönbségek
subject: GDP
subject: mezőgazdaság részesedése a GDP-ből
subject: regional integration
subject: disintegration factors
subject: difference between levels of development in the national economy
subject: distribution of GD P and GD P in agriculture

description: A neoklasszikus liberális integrációelméletek szerint a gazdasági integráció a gazdasági fejlettségi színvonalak közeledését és a különbségek fokozatos eltűnését eredményezi. Ez az összefüggés vonható le korábbi tanulmányomban végzett számításaim alapján is, melyben az ezredfordulót megelőző adatokat dolgoztam fel. Ebben a publikációban a vizsgált időszakot egészítettem ki napjainkig, és arra a kérdésre kerestem a választ, hogy a XXI. században zajló kedvezőtlen világgazdasági események – mint például a 2008. évi gazdasági világválság, a migrációs válság és a terrorfenyegetettség növekedése – miként hatottak a gazdasági fejlettségkülönbségek alakulására, elsősorban az Európai Unióban. A gazdasági fejlettséget GD P-ben mértem, továbbá vizsgáltam a mezőgazdasági GD P arányát a nemzetgazdaságban. Számításaim arra engednek következtetni, hogy a fenti hatások ellenére az integráció kiegyenlítő hatása az Európai Unió tagállamai között továbbra is mérhető – bár nagysága elmarad a korábbiétól –, továbbá az eredmények jól szemléltetik a nemzetközi munkamegosztás jelentőségét a mezőgazdaságban is. = According to the neoclassical liberal integration theories, economic integration results in the convergence of economic development levels and the gradual disappearance of differences. This conclusion can be drawn from my calculations in my previous study, in which I processed the pre-millennium data. In this publication, I extended the examined period up until today, and I attempted to answer the question of how unfavourable global economic events of the 21st century, such as the world economic crisis in 2008, the migration crisis and the increase in terrorist threats, have affected the different levels of economic development, especially in the European Union. I measured the economic development in GDP and examined the distribution of GDP in agriculture. My calculations suggest that, despite these effects, the countervailing effect of integration can still be measured between the European Union Member States – although its magnitude lags – and the results clearly illustrate the significance of international division of labour in agriculture as well.
Gravitational form factors of $ρ$ meson with a light-cone constituent quark model
Creators: name: Sun, Bao-Dong
name: Dong, Yu-Bing
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The $ρ$ meson gravitational form factors are studied based on a light-front constituent quark model which has been successfully employed to calculate its generalized parton distributions and some low-energy observables. The distributions of energy, spin, pressures, and shear forces inside the $ρ$ meson are explicitly given.
title: ASYMPTOTICAL REGIMES OF THE HYDROFRACTURING PLANAR 3D MODEL
Creators: name: Shel, E.V.
Publisher: name: Peter the Great St. Petersburg Polytechnic University
Year: 2021

description: In the proposed paper the Planar 3D model of hydraulic fracturing was investigated. All of the hydraulic fracturing equations were substituted into the mass conservation law and scaled. Nontrivial dimensionless parameters of the problem were found. Asymptotic regimes of the equation, the Radial or the Pseudo3D model, correspond to the infinitely small or the infinitely large dimensionless parameters. Thus, the limiting conditions of these models were found in the terms of the dimensionless parameters.