cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Gonyleptes bicornis Gervais 1849
Creators: name: Acosta, Luis E.
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Opiliones
Gonyleptidae
Gonyleptes
Gonyleptes bicornis

description: Revalidation of Gonyleptes bicornis
Pessoa-Silva et al. (2021: 105) proposed the synonymy of Gonyleptes bicornis under Sadocus asperatus, seemingly based on Roewer (1913) (they cite ‘fig. 4a–b’ in their synonymy; also a non-existing ‘fig. 4–4b’ in the entry for Sørensen 1902). Pessoa-Silva et al. (2021) based their conclusion on both the original description and the supposed drawings of G. bicornis, i.e., adopting the prevailing usage of considering Gervais’ (1854) fig. 4 as referable to this species. As key features from the original description of G. asperatus (cf. Gervais 1847), to support the synonymy Pessoa-Silva et al. (2021) mention (a) ‘the spines on the free tergite’, (b) ‘the two apical apophyses on the TrIV’, and (c) ‘uneven spines in the inner part of the “leg” (referring to FeIV)’. The comparison between the descriptions of G. asperatus (both the original one, Gervais 1847, and the redescription of Gervais 1849) and that of G. bicornis (Table 2) yielded the following outcomes:
(a) Spines on free tergites are described only for G. asperatus; just weak tubercles exist in G. bicornis.
(b) The description of Gervais (1847) of G. asperatus does not give enough detail about apophyses on TrIV, and only some resemblance could be extrapolated if Gervais’ (1854) fig. 9 and the description of G. bicornis were taken into account.
(c) About FeIV, Gervais’ (1847) description of G. asperatus and Gervais’ (1854) fig. 9 agree in the inner border being armed with strong apophyses; but comparison with G. bicornis is inconclusive. Incidentally, Pessoa-Silva et al. (2021) misinterpreted the word ‘leg’ (‘pierna’ in the Spanish text) assuming that Gervais (1849) referred to the femur, when the tibia was actually meant. As a matter of fact, apophyses on ‘leg’ (tibia) IV provide the best diagnostic feature to assess that G. bicornis is a member of Parabalta. This feature is only indicated in the description of G. bicornis and clearly shown on Gervais’ (1854) fig. 10.
Many items exhibit a decided mismatch between the descriptions of G. asperatus and G. bicornis (Table 2); in other features comparison resulted inconclusive (?), and only the paired armature on the ocular mound and the bifid apophysis of CxIV look similar in both (by the way, both character states are actually quite widespread in the family). In sum, G. bicornis did not prove to be a junior synonym of G. asperatus, and has to be revalidated and transferred to Parabalta instead.
description: Published as part of Acosta, Luis E., 2025, Deciphering a Chilean harvestmen enigma: what is Parabalta bicornis (Gervais, 1849) comb. nov. (Opiliones: Gonyleptidae: Pachylinae), pp. 193-208 in Zootaxa 5563 (1) on pages 195-196, DOI: 10.11646/zootaxa.5563.1.13, http://zenodo.org/record/14595841
Search for new light vector boson using $J/Ψ$ at BESIII and Belle II
Creators: name: Ban, Kayoung
name: Jho, Yongsoo
name: Kwon, Youngjoon
name: Park, Seong Chan
name: Park, Seokhee
name: Tseng, Po-Yan
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We investigate various search strategies for light vector boson $X$ in $\mathcal{O}(10)~{\rm MeV}$ mass range using $J/Ψ$ associated channels at BESIII and Belle II: (i) $J/Ψ\to η_c X$ with $10^{10} J/Ψ$s at BESIII, (ii) $J/Ψ(η_c +X) +\ell \bar{\ell}$ production at Belle~II, and (iii) $J/Ψ+X$ with the displaced vertex in $X\to e^+e^-$ decay are analyzed and the future sensitivities at Belle II with 50 ${\rm ab}^{-1}$ luminosity are comprehensively studied. By requiring the displaced vertex to be within the beam pipe, the third method results in nearly background-free analysis, and the vector boson-electron coupling and the vector boson mass can be probed in the unprecedented range, $10^{-4}\leq |\varepsilon_e| \leq 10^{-3}$ and $9~{\rm MeV}\leq m_X\leq 100 {\rm MeV}$ with 50 ${\rm ab}^{-1}$ at Belle II. This covers the favored signal region of $^8{\rm Be}^*$ anomaly recently reported by Atomki experiment with $m_X \simeq 17~{\rm MeV}$.
description: 16 pages, 8 figures, and 6 tables
The Evolution in the Faint-End Slope of the Quasar Luminosity Function
Creators: name: Hopkins, Philip F.
name: Hernquist, Lars
name: Cox, Thomas J.
name: Di Matteo, Tiziana
name: Robertson, Brant
name: Springel, Volker
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: (Abridged) Based on numerical simulations of galaxy mergers that incorporate black hole (BH) growth, we predict the faint end slope of the quasar luminosity function (QLF) and its evolution with redshift. Our simulations have yielded a new model for quasar lifetimes where the lifetime depends on both the instantaneous and peak quasar luminosities. This motivates a new interpretation of the QLF in which the bright end consists of quasars radiating at nearly their peak luminosities, but the faint end is mostly made up of quasars in less luminous phases of evolution. The faint-end QLF slope is then determined by the faint-end slope of the quasar lifetime for quasars with peak luminosities near the observed break. We determine this slope from the quasar lifetime as a function of peak luminosity, based on a large set of simulations spanning a wide variety of host galaxy, merger, BH, and ISM gas properties. Brighter peak luminosity (higher BH mass) systems undergo more violent evolution, and expel and heat gas more rapidly in the final stages of quasar evolution, resulting in a flatter faint-end slope (as these objects fall below the observed break in the QLF more rapidly). Therefore, as the QLF break luminosity moves to higher luminosities with increasing redshift, implying a larger typical quasar peak luminosity, the faint-end QLF slope flattens. From the quasar lifetime as a function of peak luminosity and this interpretation of the QLF, we predict the faint-end QLF slope and its evolution with redshift in good agreement with observations. Although BHs grow anti-hierarchically (with lower-mass BHs formed primarily at lower redshifts), the observed change in slope and differential or luminosity dependent density evolution in the QLF is completely determined by the luminosity-dependent quasar lifetime and physics of quasar feedback.
description: 13 pages, 4 figures, submitted to ApJ (Replacement with minor revisions and changed sign convention)
Valley-dependent properties of monolayer MoSi$_{2}$N$_{4}$, WSi$_{2}$N$_{4}$ and MoSi$_{2}$As$_{4}$
Creators: name: Li, Si
name: Wu, Weikang
name: Feng, Xiaolong
name: Guan, Shan
name: Feng, Wanxiang
name: Yao, Yugui
name: Yang, Shengyuan A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In a recent work, new two-dimensional materials, the monolayer MoSi$_{2}$N$_{4}$ and WSi$_{2}$N$_{4}$, have been successfully synthesized in experiment, and several other monolayer materials with the similar structure, such as MoSi$_{2}$As$_{4}$, have been predicted [{\color{blue}Science 369, 670-674 (2020)}]. Here, based on first-principles calculations and theoretical analysis, we investigate the electronic and optical properties of monolayer MoSi$_{2}$N$_{4}$, WSi$_{2}$N$_{4}$ and MoSi$_{2}$As$_{4}$. We show that these materials are semiconductors, with a pair of Dirac-type valleys located at the corners of the hexagonal Brillouin zone. Due to the broken inversion symmetry and the effect of spin-orbit coupling, the valley fermions manifest spin-valley coupling, valley-contrasting Berry curvature, and valley-selective optical circular dichroism. We also construct the low-energy effective model for the valleys, calculate the spin Hall conductivity and the permittivity, and investigate the strain effect on the band structure. Our result reveals interesting valley physics in monolayer MoSi$_{2}$N$_{4}$, WSi$_{2}$N$_{4}$ and MoSi$_{2}$As$_{4}$, suggesting their great potential for valleytronics and spintronics applications.
description: 10 pages,10 figures
Nowe dane o mączlikach (Hemiptera: Aleyrodidae) Polski uzyskane z kwerendy zbiorów zielnikowych
Creators: name: Anna Klasa
Publisher: name: Zenodo
Year: 2024
Subjects: distribution of whiteflies, puparia, herbarium collections, Poland

description: New data on whiteflies (Hemiptera: Aleyrodidae) in Poland obtained from a query of herbarium collections. The aim of the study was to assess the effectiveness of a little know method for gathering data to study the distribution of whiteflies. This method involves searching for puparia on plants deposited in herbarium collections. As a result of the research, puparia of eight whitefly species were identified at 54 new locations. The following Aleyrodidae species were detected: Aleurochiton acerinus, A. pseudoplatani, Aleuroclava similis, Aleurolobus wunni, Aleyrodes asari, A. proletella, Bemisia carpini and Pealius quercus. They were found on seven species of plants Acer campestre, A. pseudoplatanus, Vacciunim vitis-idaea, Asarum europaeum, Chelidonium majus, Corylus avellana and Lonicera xylosteum. The study demonstrated that the described herbarium query method can be useful as a supplementary method for developing distribution maps of the detected whitefly species.
Observational insights on the origin of giant low surface brightness galaxies
Creators: name: Saburova, Anna
name: Chilingarian, Igor
name: Kasparova, Anastasia
name: Sil'chenko, Olga
name: Grishin, Kirill
name: Katkov, Ivan
name: Uklein, Roman
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Giant low surface brightness galaxies (gLSBGs) with dynamically cold stellar discs reaching the radius of 130 kpc challenge currently considered galaxy formation mechanisms. We analyse new deep long-slit optical spectroscopic observations, archival optical images and published HI and optical spectroscopic data for a sample of seven gLSBGs, for which we performed mass modelling and estimated the parameters of dark matter haloes assuming the Burkert dark matter density profile. Our sample is not homogeneous by morphology, parameters of stellar populations and total mass, however, six of seven galaxies sit on the high-mass extension of the baryonic Tully-Fisher relation. In UGC 1382 we detected a global counterrotation of the stellar high surface brightness (HSB) disc with respect to the extended LSB disc. In UGC 1922 with signatures of a possible merger, the gas counterrotation is seen in the inner disc. Six galaxies host active galactic nuclei, three of which have the estimated black hole masses substantially below those expected for their (pseudo-)bulge properties suggesting poor merger histories. Overall, the morphology, internal dynamics, and low star formation efficiency in the outer discs indicate that the three formation scenarios shape gLSBGs: (i) a two-stage formation when an HSB galaxy is formed first and then grows an LSB disc by accreting gas from an external supply; (ii) an unusual shallow and extended dark matter halo; (iii) a major merger with fine-tuned orbital parameters and morphologies of the merging galaxies.
description: 20 pages, 17 figures, 8 tables, accepted version after proofreading
Local orientations of fluctuating fluid interfaces
Creators: name: Mecke, Klaus
name: Dietrich, Siegfried
Publisher: name: arXiv
Year: 2005
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Thermal fluctuations cause the local normal vectors of fluid interfaces to deviate from the vertical direction defined by the flat mean interface position. This leads to a nonzero mean value of the corresponding polar tilt angle which renders a characterization of the thermal state of an interface. Based on the concept of an effective interface Hamiltonian we determine the variances of the local interface position and of its lateral derivatives. This leads to the probability distribution functions for the metric of the interface and for the tilt angle which allows us to calculate its mean value and its mean square deviation. We compare the temperature dependences of these quantities as predicted by the simple capillary wave model, by an improved phenomenological model, and by the microscopic effective interface Hamiltonian derived from density functional theory. The mean tilt angle discriminates clearly between these theoretical approaches and emphasizes the importance of the variation of the surface tension at small wave lengths. Also the tilt angle two-point correlation function is determined which renders an additional structural characterization of interfacial fluctuations. Various experimental accesses to measure the local orientational fluctuations are discussed.
description: 29 pages, 12 figures
Eigenstate Thermalization Hypothesis for Wigner Matrices
Creators: name: Cipolloni, Giorgio
name: Erdős, László
name: Schröder, Dominik
Publisher: name: arXiv
Year: 2020
Subjects: subject: Probability (math.PR)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 60B20, 15B52, 58J51, 81Q50

description: We prove that any deterministic matrix is approximately the identity in the eigenbasis of a large random Wigner matrix with very high probability and with an optimal error inversely proportional to the square root of the dimension. Our theorem thus rigorously verifies the Eigenstate Thermalization Hypothesis by Deutsch [Deutsch 1991] for the simplest chaotic quantum system, the Wigner ensemble. In mathematical terms, we prove the strong form of Quantum Unique Ergodicity (QUE) with an optimal convergence rate for all eigenvectors simultaneously, generalizing previous probabilistic QUE results in [Bourgade, Yau 2017] and [Bourgade, Yau, Yin 2020].
description: 39 pages. Added remark on choice of renormalisation
Computational Phase Transitions: Benchmarking Ising Machines and Quantum Optimisers
Creators: name: Philathong, Hariphan
name: Akshay, Vishwa
name: Samburskaya, Ksenia
name: Biamonte, Jacob
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: While there are various approaches to benchmark physical processors, recent findings have focused on computational phase transitions. This is due to several factors. Importantly, the hardest instances appear to be well-concentrated in a narrow region, with a control parameter allowing uniform random distributions of problem instances with similar computational challenge. It has been established that one could observe a computational phase transition in a distribution produced from coherent Ising machine(s). In terms of quantum approximate optimisation, the ability for the quantum algorithm to function depends critically on the ratio of a problems constraint to variable ratio (called density). The critical density dependence on performance resulted in what was called, reachability deficits. In this perspective we recall the background needed to understand how to apply computational phase transitions in various bench-marking tasks and we survey several such contemporary findings.
description: 11 pages, 2+1 figures, JPhys Complexity (invited perspective)
Relaxation dynamics of the optically driven nonequilibrium states in the electron- and hole-doped topological-insulator materials $(Bi_{1-x}Sb_{x})_{2}Te_{3}$
Creators: name: Reinhoffer, Chris
name: Mukai, Yu
name: Germanskiy, Semyon
name: Bliesener, Andrea
name: Lippertz, Gertjan
name: Uday, Anjana
name: Taskin, A. A.
name: Ando, Yoichi
name: Wang, Zhe
name: van Loosdrecht, Paul H. M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report on time-resolved mid-infrared-pump terahertz-transmission-probe studies of the topological-insulator materials $(Bi_{1-x}Sb_{x})_{2}Te_{3}$, in which by varying x charge carriers are chemically tuned to be of n-type or p-type. Relaxation dynamics is found to be different in various aspects for transitions below or above the bandgap, which are selectively excited by changing the pump-pulse energy. For the below-bandgap excitation, an exponential decay of the pump-probe signals is observed, which exhibits linear dependence on the pump-pulse fluence. In contrast, the relaxation dynamics for the above-bandgap excitation is characterized by a compressed exponential decay and nonlinear fluence dependence at high pump flunences, which reflects interaction of the excited nonequilibrium states.
Repentance and free will in Maimonides’ Book of knowledge: laws of repentance
Creators: name: Halstead, Lauretta Ann Hammond
Publisher: name: Maryland Shared Open Access Repository
Year: 2016

description: (Ph. D.) -- Towson University, 2015.
description: This dissertation argues that there is an unresolved tension between the loss of the ability to repent and the idea of absolute free will in Maimonidean thought. It explores the idea that confession, which is the biblical Law requiring that the penitent must first confess, is the substance of repentance. The research explores repentance and free will in Maimonides’ Book of Knowledge: Laws of Repentance, with insights from his other works, to include the Guide of the Perplexed, Eight Chapters, and other ethical and halakhic writings. Maimonides explains repentance as the essential pathway, which ultimately leads to love of God, resulting in attainment of life in the World to Come. If the will is impinged upon by God, circumstances of life, external sources, etc., it creates a psychological and existential dissonance and cannot simultaneously be “free,” as the biblical account of the hardening of Pharaoh's heart seems to imply. Therefore, the question of absolute free will arises. Consequently, this study is driven by the following questions: Is repentance an act of human will or is it a divine endowment? According to Maimonides, does God impinge upon the ability to repent, and if so, is this necessarily a usurping of the will? Is the loss of the ability to repent the same as the loss of the ability to exercise free will? Is the human will absolutely free to repent as Maimonides believes or is it a gift given by God at some times and not others? What does it mean to have the heart “hardened” by God and how does this affect free will? What is the ultimate purpose of human life according to Maimonides? The path of research entailed analyzing repentance and free will according to Maimonides in light of current research in the field as well as consideration of classical Jewish texts, such as Saadia Gaon's The Book of Beliefs and Opinions, Ibn Paquda's Duties of the Heart and Rabbenu Yonah of Gerona's The Gates of Repentance. This study illuminates the influence on Maimonidean thought by philosophers such as Aristotle, Avicenna and Al-Farabi, as well as the intellectual climate of Andalusia into which Maimonides was born.
Single massive stars at the critical rotational velocity: possible links with Be and B[e] stars
Creators: name: Meynet, Georges
name: Maeder, Andre
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Using single star models including the effects of shellular rotation with and without magnetic fields, we show that massive stars at solar metallicity with initial masses lower than about 20-25 M$_\odot$ and with an initial rotation above $\sim 350$ km s$^{-1}$ likely reach the critical velocity during their Main-Sequence phase. This results from the efficient outwards transport of angular momentum by the meridional circulation. This could be a scenario for explaining the Be stars. After the Main-Sequence phase, single star in this mass range can again reach the critical limit when they are on a blue loop after a red supergiant phase \citep{HL98}. This might be a scenario for the formation of B[e] stars, however as discussed by Langer & Heger (1998), this scenario would predict a short B[e] phase (only some 10$^4$ years) with correspondingly small amounts of mass lost.
description: 11 pages, 13 figures, Stars with the B[e] phenomenon, M. Kraus and A. Miroshnichenko, ASP Conference Series, in press
Evaluation of Rumble Strip Design and Usage
Creators: name: Pigman, Jerry G.
name: Barclay, Michael M.
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 1981
Subjects: subject: Transportation Engineering

description: The objective of this study was to investigate the following aspects of rumble strips: the optimum height and width of elements in a rumble strip pattern, spacing between them, the effect of grouping elements into sets, the effects of speed on design criteria, and driver reaction to the audible and physical stimuli produced by rumble strips. A survey of design and usage in other states was conducted; and the results show that even though 35 of the 44 responding states have installed rumble strips, only five have warrants for usage.  Two types of rumble strip design were evaluated -- one with a constant spacing between elements and another with variable spacing between elements. Simulated tests using strips of plywood showed that a distance of 10 feet (3.0 m) between elements, a strip width of 4 inches (102 mm), and a strip height of 1/2 inch (13 mm) produced the best results. Based on audible and physical stimuli, it was determined that the rumble time should not exceed 3/4 second of continuous rumble for any pattern.  Evaluation of field installations failed to show a statistically significant difference in speeds for either the constant-spaced pattern or variable-spaced pattern. Based on these installations and controlled-spacing tests, it appears that the constant-spaced pattern should continue to be used. Polyvinyl strips were installed without much success because of adherence problems. A double layer of reflective marking tape performed satisfactorfly with regard to durability and reflectivity; however, the rumble effect was slight.
Identification, Analysis, and Correction of High-Accident Locations in Kentucky
Creators: name: Zegeer, Charles V.
name: Agent, Kenneth R.
name: Rizenbergs, Ronalds L.
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 1981
Subjects: subject: Transportation Engineering

description: The first step in the highway safety improvement process involves reporting and summarizing accidents by location. Once the high-accident locations are identified, field investigations and analysis follow. Locations are ranked on the basis of potential for accident reduction. Safety improvements are then scheduled and implemented. Finally, improvements are evaluated in terms of accident reduction.  This report compiles, in detail, the process involved in arriving at safety improvements in the high-accident spot-improvement program. References are made to information and methodologies developed in earlier reports by the Division of Research of the Kentucky Department of Transportation. Most of the background information and analysis techniques used to develop the methodologies are not included here. The methods, instead, are cited as they fit together in the total process. The procedures are shown as they fit into the total safety improvement process developed and implemented by the Division of Traffic of the Kentucky Department of Transportation.
พระบาทสมเด็จพระเจ้าอยู่หัวภูมิพลอดุลยเดชฯ กับการใช้ภาษาต่างประเทศของคนไทย
Creators: name: วิภา กงกะนันทน์
Publisher: name: คณะศิลปศาสตร์ มหาวิทยาลัยธรรมศาสตร์
Year: 2017
Subjects: -

description: วรรณวิทัศน์, 17, พฤศจิกายน, 1-4
Structural Capacity of In-Place Asphaltic Concrete Pavements from Dynamic Deflections
Creators: name: Southgate, Herbert F.
name: Sharpe, Gary W.
name: Deen, Robert C.
name: Havens, James H.
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 1981
Subjects: subject: Transportation Engineering

description: The proper design of asphaltic overlay thicknesses involves four major factors; the in-place modulus of the subgrade, an estimate of the structural capacity of the existing pavement, estimates of the future traffic expressed as equivalent axleloads and required or desired design levels, and a thickness design procedure. This paper deals with estimating the in-place subgrade modulus and the remaining load-carrying capacity of the existing pavement. The method presented herein is valid for any Road Rater or other dynamic tester such as the Dynaflect. This procedure was based upon a 600-pound (272.4-kg) peak-to-peak dynamic load applied at a rate of 25 Hz. The steady-state deflections have to be adjusted for load, dynamic frequency, and location of sensors. This method should be applied only to those testers that use a constant vibratory load.
On-demand quantum storage of photonic qubits in an on-chip waveguide
Creators: name: Liu, Chao
name: Zhu, Tian-Xiang
name: Su, Ming-Xu
name: Ma, You-Zhi
name: Zhou, Zong-Quan
name: Li, Chuan-Feng
name: Guo, Guang-Can
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Photonic quantum memory is the core element in quantum information processing (QIP). For the scalable and convenient practical applications, great efforts have been devoted to the integrated quantum memory based on various waveguides fabricated in solids. However, on-demand storage of qubits, which is an essential requirement for QIP, is still challenging to be implemented using such integrated quantum memory. Here we report the on-demand storage of time-bin qubits in an on-chip waveguide memory on the surface of a $^{151}$Eu$^{3+}$:Y$_2$SiO$_5$ crystal, utilizing the Stark modulated atomic frequency comb protocol. A qubit storage fidelity of $99.3\%\pm0.2\%$ is obtained with a input of 0.5 photons per pulse, far beyond the highest fidelity achievable using the classical measure-and-prepare strategy. The developed integrated quantum memory with the on-demand retrieval capability, represents an important step towards practical applications of integrated quantum nodes in quantum networks.
description: 6 pages, 4 figures and 1 table
Topological gravity on plumbed V-cobordisms
Creators: name: Efremov, Vladimir N.
name: Mitskievich, Nikolai V.
name: Magdaleno, Alfonso M. Hernandez
name: Bautista, Ramona Serrano
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: An ensemble of cosmological models based on generalized BF-theory is constructed where the role of vacuum (zero-level) coupling constants is played by topologically invariant rational intersection forms (cosmological-constant matrices) of 4-dimensional plumbed V-cobordisms which are interpreted as Euclidean spacetime regions. For these regions describing topology changes, the rational and integer intersection matrices are calculated. A relation is found between the hierarchy of certain elements of these matrices and the hierarchy of coupling constants of the universal (low-energy) interactions. PACS numbers: 0420G, 0240, 0460
description: 29 pages
Consumers’ Buying Groups in the Short Food Chains: Alternatives for Trust
Creators: name: Carbone, Anna
name: Gaito, Marco
name: Senni, Saverio
name: Carbone, Anna
name: Gaito, Marco
name: Senni, Saverio
Publisher: name: Unknown
Year: 2007
Subjects: subject: Consumer/Household Economics
subject: Marketing
subject: FOS: Economics and business
subject: Trust
subject: Transaction Cost
subject: Exit/Voice
subject: Consumer's buying groups
subject: Short food chains

description: Food markets in affluent countries tend to be characterized by increasing complexity under several regards such as the organization of the productive chains, the process that leads to the formation of consumer’s preferences, the information/communication task and the building of trust among stakeholders. In particular, consumers are increasingly concerned about many credence attributes such as food safety, environmental concerns, the fairness of trade conditions, product origin and so forth. The paper focus on short chains and consumers’ buying groups (CBGs) seen as strategies to overcome the emerging difficulties that consumers face in collecting and processing information on credence attributes. The results of a field survey, based on e-mail interviews to Italian CBGs’ members are presented. The survey had the aim to explore personal motivations to join a CBG, the groups’ main objectives and organization and, eventually, the degree of satisfaction with this organization of the food shopping. The paper is organized as follows. Section 2 analyses the sources of consumer’s substantial distrust on many of the products available on food markets and underlines that the most common remedies to market failures due to asymmetric information, undertaken both by producers and policy makers, are far to be fully effective. Section 3 is devoted to short chains, directly connecting producers to consumers, and CBGs, i.e. families that organize their shopping on a collective basis to better pursue their ethical goals and to gain organizational advantages. Both weakness and strength points of short chains and of CBGs are briefly discussed from the consumers’ as well as from the producers’ point of view. The results of the interviews are analysed in the fourth section while some concluding remarks are contained in the last section.
Hardy spaces for boundary value problems of elliptic systems with block structure
Creators: name: Auscher, Pascal
name: Egert, Moritz
Publisher: name: arXiv
Year: 2020
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics

description: We present recent results on elliptic boundary value problems where the theory of Hardy spaces associated with operators plays a key role.
description: Survey article in the honor of Guido Weiss' ninetieth birthday. Upload of the published version. A teaser for our recent monograph arXiv:2012.02448
Modelling Policies for Multifunctional Agriculture and Rural Development in a Remote EU Region (Caithness & Sutherland, Scotland, UK)
Creators: name: Bergmann, Holger
name: Thomson, Kenneth J.
name: Bergmann, Holger
name: Thomson, Kenneth J.
Publisher: name: Unknown
Year: 2008
Subjects: subject: Agricultural and Food Policy
subject: Community/Rural/Urban Development
subject: Public Economics
subject: Research Methods/ Statistical Methods
subject: modelling
subject: multifunctionality
subject: input-output
subject: systems dynamics
subject: rural policy

description: A modified version of a system dynamics model constructed for an EU-wide case-study project (TOPMARD) using STELLA software was used to simulate the effects of a number of development scenarios for a remote rural area in Northern Scotland, i.e. Caithness & Sutherland, which is characterised by multifunctional agriculture. In this paper, the context of the modelling work in policy and socioeconomic terms is first described. This is followed by the specification of the model and of the modelling scenarios, one of which relates to the “decommissioning” (run-down) of a major industrial site (Dounreay) within the area. The modelling results are discussed, in terms of regional population, land use, economic and other terms, from 2001 to 2015/2031. Finally, some conclusions are drawn, both about the implications of the results for such remote rural regions, and the usefulness of this type of modelling exercise for policy analysis of multifunctionality and rural development.
Development of a Thickness Design System for Bituminous Concrete Pavements
Creators: name: Southgate, Herbert F.
name: Deen, Robert C.
name: Havens, James H.
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 1981
Subjects: subject: Transportation Engineering

description: A pavement provides a functional surface for safe operation of a vehicle. The operator or passenger of a vehicle does not particularly care about the material from which the pavement structure is constructed. However, they are sensitive to such factors as speed, safety (skid resistance), and comfort (roughness). One aspect of pavement design is the selection of the thickness of the pavement and its various components sufficient to support vehicular loadings and to transfer those loadings through successive layers of the pavement - surface, base, and subgrade - to the soil on which the pavement rests. The structural design of a highway pavement involves a study of the soils, paving materials, and their behavior under load. The pavement must be adequate to support the wheel loads of motor vehicles. Each time a vehicle passes over a pavement, some stressing and straining of the surface and underlying layers occur. If the load is excessive or if the supporting layers are not sufficiently strong, repeated applications of the vehicular loadings will cause rutting and cracking that ultimately lead to a complete structural failure of the pavement. The pavement thickness design scheme suggested in this report provides a procedure by which the load-carrying capabilities of any individual layer or of the soil upon which the pavement rests are not exceeded.
Institutional Change and Acceptance of Quality Assurance: The Case of Organic Farming in Germany
Creators: name: Schulze, Holger
name: Jahn, Gabriele
name: Spiller, Achim
name: Schulze, Holger
name: Jahn, Gabriele
name: Spiller, Achim
Publisher: name: Unknown
Year: 2008
Subjects: subject: Farm Management
subject: Institutional and Behavioral Economics
subject: Marketing
subject: FOS: Economics and business
subject: organic certification system
subject: food quality
subject: institutional change
subject: guidelines and control

description: The institutional framework of the certification scheme is a crucial factor for the future success of the organic market. Increasing complexity and a few scandals indicate that the current control structures might be insufficient. A better understanding of farmers’ attitudes is necessary to increase acceptance and to guarantee the longer-term success of the organic certification system. Against this background we designed a theoretical framework based on a cognitive perspective. The empirical basis of the study was a survey conducted with organic farmers in Germany. Results highlight that the majority of the farmers accept the present organic certification system, but are not convinced of its cost-benefit relationship.
The Arecibo Legacy Fast ALFA Survey: II. Results of Precursor Observations
Creators: name: Giovanelli, Riccardo
name: Haynes, Martha P.
name: Kent, Brian R.
name: Perillat, Philip
name: Catinella, Barbara
name: Hoffman, G. Lyle
name: Momjian, Emmanuel
name: Rosenberg, Jessica L.
name: Saintonge, Amelie
name: Spekkens, Kristine
name: Stierwalt, Sabrina
name: Brosch, Noah
name: Masters, Karen L.
name: Springob, Christopher M.
name: Karachentsev, Igor D.
name: Karachentseva, Valentina E.
name: Koopmann, Rebecca A.
name: Muller, Erik
name: van Driel, Wim
name: van Zee, Liese
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In preparation for the full Arecibo Legacy Fast ALFA extragalactic HI survey, precursor observations were carried out in Aug--Sep 2004 with the 7-beam Arecibo L-band feed array (ALFA) receiver system and the WAPP spectral processors. While these observations were geared mainly at testing and debugging survey strategy, hardware and software, approximately 36 hours of telescope time yielded science--quality data. From those observations, an initial list of 730 tentative detections of varying degree of reliability was extracted. Ninety--eight high signal-to-noise candidates were deemed to be bona fide HI line detections. To test our ability to discriminate cosmic signals from RFI and noise, 165 candidates ranging in reliability likelihood were re--observed with the single beam L--band wide system at Arecibo in Jan--Feb 2005. Of those, 41% were confirmed as real. We present the results of both the ALFA and single beam observations for the sample of 166 confirmed HI sources, as well as our assessment of their optical counterparts. Of the 166 sources, 62 coincide with previously known HI sources, while optical redshifts were available for an additional 18 galaxies; thus, 52% of the redshifts reported here were previously unknown. Of the 166 HI detections, 115 are identified with previously cataloged galaxies, of either known or unknown redshift, leaving 51 objects identified for the first time. Because of the higher sensitivity of the Arecibo system, fewer than 10% of the 166 HI sources would have been detected by a HIPASS--like survey of the same region. Three of the objects have HI masses less than 10^7 solar masses. The full ALFALFA survey which commenced in February 2005 should detect more than 100 times as many objects of similarly low HI mass over the next 5 years.
description: 40 pages, including 4 tables and 8 figures; to appear in Astron. J.; see http://egg.astro.cornell.edu/alfalfa/pubs.php
Importance and Relevance of Quality Labels in the Austrian Meat Supply Chain
Creators: name: Meixner, Oliver
name: Haas, Rainer
name: Pochtrager, Siegfried
name: Meixner, Oliver
name: Haas, Rainer
name: Pochtrager, Siegfried
Publisher: name: Unknown
Year: 2007
Subjects: subject: Agribusiness
subject: Livestock Production/Industries
subject: Marketing
subject: FOS: Economics and business

description: Meat is one the most important products concerning sales in the food retail sector in industrialised countries. Confirming Eurostat (2007), almost 45% of the agricultural output in the EU 15 comes from meat. However, production figures of some meat products, especially beef, declined dramatically during the last ten years (minus 690 000 tons between 1995 and 2005 within the EU 15). 1 Due to several major food scandals in the meat sector (BSE, bird flu, etc.) consumers are actually quite suspicious towards meat quality and production conditions. Some try to change their eating behaviour (less meat), others change from one product category to another (from beef to chicken). As a result, the demand for specific meat products declined during the last decade and the one with the most dramatic decrease was definitely beef (as a consequence of the BSE-chrisis). Therefore, producers and supermarket chains tend to use quality labels to suggest reliability of their meat products. The following study investigates the importance and relevance of several quality labels. For this purpose we used a routine method of the measurement of consumer perceptions, the Conjoint Analysis
Analog of photon-assisted tunneling in a Bose-Einstein condensate
Creators: name: Eckardt, Andre
name: Jinasundera, Tharanga
name: Weiss, Christoph
name: Holthaus, Martin
Publisher: name: arXiv
Year: 2006
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We study many-body tunneling of a small Bose-Einstein condensate in a periodically modulated, tilted double-well potential. Periodic modulation of the trapping potential leads to an analog of photon-assisted tunneling, with distinct signatures of the interparticle interaction visible in the amount of particles transferred from one well to the other. In particular, under experimentally accessible conditions there exist well-developed half-integer Shapiro-like resonances.
description: 4 pages, 4 figures, RevTeX
Modelling Regional Agricultural Output Adjustments in Scotland in Response to CAP Reform
Creators: name: Revoredo-Giha, Cesar
name: Leat, Philip M.K.
name: Milne, Catherine E.
name: Revoredo-Giha, Cesar
name: Leat, Philip M.K.
name: Milne, Catherine E.
Publisher: name: Unknown
Year: 2008
Subjects: subject: International Relations/Trade
subject: Research Methods/ Statistical Methods
subject: Regional models
subject: CAP reform
subject: agricultural production econometrics

description: The purpose of the paper is to present an agricultural supply model for Scotland used to estimate regional changes in agricultural outputs due to the 2003 Common Agricultural Policy (CAP) reform. Supply functions were estimated for several farm types based on generalised trans-logarithmic multiproduct cost functions (Caves, Christensen and Tretheway, 1981). The data used for the estimation were an unbalanced panel dataset constructed using farm level data from the Scottish Executive’s Farm Accounts Scheme (FAS) survey. Using the estimated supply adjustments, individual farm level responses to subsidy and price changes were aggregated using agricultural census weights to estimate the output changes for different regions.
Rent Seeking and the Common Agricultural Policy: Do member countries free ride on lobbying?
Creators: name: Furtan, William Hartley
name: Jensen, Maria Skovager
name: Sauer, Johannes
name: Furtan, William Hartley
name: Jensen, Maria Skovager
name: Sauer, Johannes
Publisher: name: Unknown
Year: 2008
Subjects: subject: Agricultural and Food Policy
subject: International Relations/Trade
subject: Political Economy
subject: free-riding
subject: rent-seeking
subject: Common Agricultural Policy

description: The Common Agricultural Policy is modelled as a club good providing the European Union (EU) farmer with financial benefits. We build an economic model which explains how much farmers in individual EU countries invest in rent-seeking activities in order to test for free-riding behaviour on lobbying costs. For our investigation we group the EU member countries by farm structure, and the type of benefit received. We explain the fees paid by farmers for lobbying by other countries fees, political variables, and country and regional agricultural characteristics. The model shows that some member countries free ride on others. This suggests a form of policy path dependency and leads to a suboptimal investment on lobbying of 7.5%.
Bottom tangles and universal invariants
Creators: name: Habiro, Kazuo
Publisher: name: arXiv
Year: 2005
Subjects: subject: Geometric Topology (math.GT)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: 57M27, 18D10, 57M25

description: A bottom tangle is a tangle in a cube consisting only of arc components, each of which has the two endpoints on the bottom line of the cube, placed next to each other. We introduce a subcategory B of the category of framed, oriented tangles, which acts on the set of bottom tangles. We give a finite set of generators of B, which provides an especially convenient way to generate all the bottom tangles, and hence all the framed, oriented links, via closure. We also define a kind of "braided Hopf algebra action" on the set of bottom tangles. Using the universal invariant of bottom tangles associated to each ribbon Hopf algebra H, we define a braided functor J from B to the category Mod_H of left H-modules. The functor J, together with the set of generators of B, provides an algebraic method to study the range of quantum invariants of links. The braided Hopf algebra action on bottom tangles is mapped by J to the standard braided Hopf algebra structure for H in Mod_H. Several notions in knot theory, such as genus, unknotting number, ribbon knots, boundary links, local moves, etc are given algebraic interpretations in the setting involving the category B. The functor J provides a convenient way to study the relationships between these notions and quantum invariants.
description: This is the version published by Algebraic & Geometric Topology on 7 September 2006
WHY STOCHASTICS MATTER: ANALYZING FARM AND BIOFUEL POLICIES
Creators: name: Westhoff, Patrick C.
name: Brown, Scott
name: Binfield, Julian C.R.
name: Westhoff, Patrick C.
name: Brown, Scott
name: Binfield, Julian C.R.
Publisher: name: Unknown
Year: 2008
Subjects: subject: Agricultural and Food Policy
subject: Research and Development/Tech Change/Emerging Technologies
subject: Research Methods/ Statistical Methods
subject: Agricultural policy
subject: biofuels
subject: stochastic analysis
subject: structural model

description: Standard deterministic analysis of agricultural and biofuel policies can yield incomplete or misleading results. Stochastic analysis is especially important when policies have asymmetric effects and when there is intrinsic interest in uncommon events or the distribution of possible outcomes. The paper examines four recent cases where a stochastic approach was critical to a complete and balanced examination of important US policy issues. In each case, a stochastic model of the US agricultural and biofuel sectors was used to estimate 500 sets of possible market outcomes for the 2007- 2016 period. Changes in support levels, a proposed revenue-based program, possible World Trade Organization limits on internal support measures, and biofuel use mandates are all found to have potential impacts that could have been missed by traditional deterministic analysis. A stochastic approach could also be valuable in looking at EU policy questions such as possible reductions in intervention prices and export subsidies.
Effects of agri-environmental measures and changes in EU single farm payments on Dutch agriculture
Creators: name: Helming, John F.M.
name: Schrijver, R.A.M.
name: Helming, John F.M.
name: Schrijver, R.A.M.
Publisher: name: Unknown
Year: 2008
Subjects: subject: Agricultural and Food Policy
subject: Agricultural Finance
subject: Livestock Production/Industries
subject: Research Methods/ Statistical Methods
subject: economic models
subject: model linking
subject: policy
subject: regions
subject: dairy farming
subject: environment and nature

description: Part of the Health check of the Common Agricultural Policy (CAP) of the European Union in 2008, will be a discussion of the linkage between direct payments to farmers and the contribution of agricultural production to social important values. The objective of this paper is to analyse the economic and environmental effects of extra region specific environmental measures and a redistribution of direct payments to the Dutch agricultural sector in 2020. In doing so a chain of models is used from the dairy farm level to the regional sector level in the Netherlands to the European sector level. From the dairy farm model it is found that the extra-environmental measures result in a decrease in the number of dairy cows per ha and a decrease in the gross margin per ha in the regions at hand. At maximum the gross margin decreases with about € 1,300 per ha. This is the case on intensive types of dairy farms in the Nature2000 areas. Linking and aggregating these results to the regional sector level and using the sector model of the Netherlands it is found that income from dairy farming at sector level and national milk production decreases with about 6%. Emission of ammonia decreases with 11% and Nitrogen (N) surplus at soil level decreases with 22%. However, economic and environmental results can be very different per type of dairy farm and province.
Two stories told in Hupa and in English
Creators: name: Parker, Verdena
name: Lee-Wynant, Tyler
name: Spence, Justin
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2020
Subjects: subject: hup

description: Audio file VP-201217-06: two stories told in Hupa and in English: one about a difficult person that Otis used to work with, and another about how Verdena used to work selling Avon products door-to-door.