cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Spontaneous symmetry breaking of a hyperbolic sigma model in three dimensions
Creators: name: Spencer, T.
name: Zirnbauer, M. R.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mathematical Physics (math-ph)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Non-linear sigma models that arise from the supersymmetric approach to disordered electron systems contain a non-compact bosonic sector. We study the model with target space H^2, the two-hyperboloid with isometry group SU(1,1), and prove that in three dimensions moments of the fields are finite in the thermodynamic limit. Thus the non-compact symmetry SU(1,1) is spontaneously broken. The bound on moments is compatible with the presence of extended states.
description: 21 pages, dedicated to F.J. Dyson on the occasion of his 80th birthday
Uma Perspectiva Evolucionária da Economia Agrícola: o caso da produção ovina no Brasil e Uruguai
Creators: name: Viana, João Garibaldi Almeida
name: Waquil, Paulo Dabdab
name: Viana, João Garibaldi Almeida
name: Waquil, Paulo Dabdab
Publisher: name: Unknown
Year: 2015
Subjects: subject: Agribusiness
subject: evolutionary economics
subject: agricultural economics
subject: structural change
subject: sheep production.

description: he objective of this article was to develop institutional and evolutionary concepts to subsidize the analysis of agricultural markets. The analytical and theoretical constructions were applied in the case of the evolution of sheep production to answer the question: institutional and evolutionary variables are determinant to increase the sheep raising in Brazil and Uruguay? The hypothesis of the research is the importance of institutional and evolutionary variables in the production process, with the decisive role of informal rules and economic dynamics for the future development of the activity. The data of empirical case were analyzed using parametric hypothesis tests and logistic regression analysis. The results show that institutional factors were decisive in both the maintenance of sheep farmers after a process of structural change, which has a future pretension of increasing sheep production in the two studied regions, indicating a decisive role in informal rules of society (customs, traditions etc.) and non-economic ways of thinking in the dynamics of economic activity after periods of imbalances. The research demonstrated the possibility of applying evolutionary economic assumptions, seeking to understand the phenomenon as well as stimulating the strengthening of this approach in several theoretical and empirical issues in the field of agricultural economics.
Additional file 1 of The relationship between clinical dishonesty and perceived clinical stress among nursing students in southeast of Iran
Creators: name: Foozieh Rafati
name: Behnaz Bagherian
name: Shahrbabaki, Parvin Mangolian
name: Goghary, Zahra Imani
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 1. Questionnaire 1: Clinical Dishonesty Questionnaire
Scalable fault-tolerant quantum computation in DFS blocks
Creators: name: Zhou, Zheng-Wei
name: Yu, Bo
name: Zhou, Xingxiang
name: Feldman, Marc J.
name: Guo, Guang-Can
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate how to concatenate different decoherence-free subspaces (DFSs) to realize scalable universal fault-tolerant quantum computation. Based on tunable $XXZ$ interactions, we present an architecture for scalable quantum computers which can fault-tolerantly perform universal quantum computation by manipulating only single type of parameter. By using the concept of interaction-free subspaces we eliminate the need to tune the couplings between logical qubits, which further reduces the technical difficulties for implementing quantum computation.
description: 4 papges, 2 figures
A Comunicação na Articulação Agroindustrial entre Uma Cooperativa Central, suas Cooperativas Singulares e Cooperados
Creators: name: Sousa, Diego Neves De
name: Amodeo, Nora Beatriz Presno
name: Macedo, Alex Dos Santos
name: Milagres, Cleiton Silva Ferreira
name: Sousa, Diego Neves De
name: Amodeo, Nora Beatriz Presno
name: Macedo, Alex Dos Santos
name: Milagres, Cleiton Silva Ferreira
Publisher: name: Unknown
Year: 2014
Subjects: subject: Agribusiness
subject: communication
subject: cooperatives
subject: agribusiness system.

description: ommunication plays an essential role in the articulation of different levels of the organization to efficiently coordinate the production chain without competing for resources, taking the competitive potential of the cooperative vertical integration (Central - Singles). This study aimed to analyze organizational communication in agribusiness relation among a Central Cooperative, their Single Cooperatives and members. The research is exploratory-descriptive using a case study, supported by the semi-structured interview technique. It was concluded that the survival of this model (Central – Singles) depends on the linkage between different levels of the cooperative’s production organization.
Additional file 1 of Associations of 2D speckle tracking echocardiography-based right heart deformation parameters and invasively assessed hemodynamic measurements in patients with pulmonary hypertension
Creators: name: Theres, Lena
name: Hübscher, Anne
name: Stangl, Karl
name: Dreger, Henryk
name: Knebel, Fabian
name: Brand, Anna
name: Hewing, Bernd
Publisher: name: figshare
Year: 2020
Subjects: subject: Biophysics
subject: Biochemistry
subject: Space Science
subject: Cell Biology
subject: Physiology
subject: FOS: Biological sciences

description: Additional file 1: Table S1. Associations of diverse clinical characteristics and RV strain with PH; multivariate regression analysis. Table S2. Associations of diverse clinical characteristics and RA strain with PH; multivariate regression analysis.
From RE-211 to RE-123. How to control the final microstructure of superconducting single-domains
Creators: name: Cloots, R.
name: Koutzarova, T.
name: Mathieu, J. -P.
name: Ausloos, M.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: This paper reviews the usual techniques for producing YBCO-type single-domains and the microstructure of the as-obtained samples. The problems of seed dissolution and parasite nucleations are discussed in details. Formation of microstructural defects, such as pores and cracks, are examined. An important part of this review is devoted to the study of the influence of RE-211 particles [RE2BaCuO5 where RE denotes Y, Yb, Nd, Sm, Dy, Gd, Eu or a mixture of them. Generally Nd4Ba2Cu2O10 is preferred to Nd2BaCuO5] on the microstructure and properties of RE-Ba-Cu-O single-domains. Trapping/Pushing theory is described in order to explain the spatial distribution of RE-211 particles in the RE-123 [(RE)Ba2Cu3O7-d] monoliths. Formation of RE-211-free regions is discussed. Different ways to limit the RE-211 coarsening are reviewed. Microstructural defects in the RE-123 matrix caused by the RE-211 particles are presented. It is also shown that RE-211 particles play a significant role on the mechanical properties of single-domain samples. We finish this review by discussing the Infiltration and Growth process as a good technique to control the microstructure.
description: review paper to be published in Supercond. Sci. Technol.; 19 figures; 137 references; 37 pages
página G rau de Cobertura do Programa de Aquisição de Alimentos (PAA) Junto aos Agricultores Familiares do Estado de Minas Gerais
Creators: name: Simão, Gustavo Leonardo
name: Silva, Edson Arlindo
name: Silveira, Suely De Fátima Ramos
name: Simão, Gustavo Leonardo
name: Silva, Edson Arlindo
name: Silveira, Suely De Fátima Ramos
Publisher: name: Unknown
Year: 2014
Subjects: subject: Agribusiness
subject: Food Acquisition Program
subject: effectiveness of public policies
subject: family farming
subject: indicators
subject: public policy.

description: Indicators are useful instruments in the scope of public management, given its ability to measure the effectiveness of government actions. This study aimed to develop an indicator to measure the level of implementation propensity of the Food Acquisition Program (FPA) in some municipalities of Minas Gerais State in 2011, which involves the propensity of food insecurity in the local population and the need to access the market by the local family farming. The indicator was called Propensity Index to Execution of FPA (PIE-FPA), and was produced using two proxies composed by five variables. It was found that the most resources were transferred to farmers located in the municipalities of higher demand of program activities, and that the level of coverage of the program is still incipient in face of the needs of demanding regions. There is also unequal mesorregional coverage of the program, indicating that some regions have been disregarded, especially Zona da Mata Mineira. The PIE-FPA was useful in pointing an innovative public policy in the context of how Brazilian public management has been developed and implemented.
Notes on two-dimensional pure supersymmetric gauge theories
Creators: name: Gu, W.
name: Sharpe, E.
name: Zou, H.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this note we study IR limits of pure two-dimensional supersymmetric gauge theories with semisimple non-simply-connected gauge groups including SU(k)/Z_k, SO(2k)/Z_2, Sp(2k)/Z_2, E_6/Z_3, and E_7/Z_2 for various discrete theta angles, both directly in the gauge theory and also in nonabelian mirrors, extending a classification begun in previous work. We find in each case that there are supersymmetric vacua for precisely one value of the discrete theta angle, and no supersymmetric vacua for other values, hence supersymmetry is broken in the IR for most discrete theta angles. Furthermore, for the one distinguished value of the discrete theta angle for which supersymmetry is unbroken, the theory has as many twisted chiral multiplet degrees of freedom in the IR as the rank. We take this opportunity to further develop the technology of nonabelian mirrors to discuss how the mirror to a G gauge theory differs from the mirror to a G/K gauge theory for K a subgroup of the center of G. In particular, the discrete theta angles in these cases are considerably more intricate than those of the pure gauge theories studied in previous papers, so we discuss the realization of these more complex discrete theta angles in the mirror construction. We find that discrete theta angles, both in the original gauge theory and their mirrors, are intimately related to the descriptions of centers of universal covering groups as quotients of weight lattices by root sublattices. We perform numerous consistency checks, comparing results against basic group-theoretic relations as well as with decomposition, which describes how two-dimensional theories with one-form symmetries (such as pure gauge theories with nontrivial centers) decompose into disjoint unions, in this case of pure gauge theories with quotiented gauge groups and discrete theta angles.
description: LaTeX, 49 pages, 1 figure; v2: reference added
Scalar meson in dynamical and partially quenched two-flavor QCD: lattice results and chiral loops
Creators: name: Prelovsek, S.
name: Dawson, C.
name: Izubuchi, T.
name: Orginos, K.
name: Soni, A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: This is an exploratory study of the lightest non-singlet scalar $q\bar q$ state on the lattice with two dynamical quarks. Domain Wall fermions are used for both sea and valence quarks on a 16^3*32 lattice with an inverse lattice spacing of 1.7 GeV. We extract the scalar meson mass 1.58(34) GeV from the exponential time-dependence of the dynamical correlators with $m_{val}=m_{sea}$ and N_f=2. Since this statistical error-bar from dynamical correlators is rather large, we analyze also the partially quenched lattice correlators with $m_{val}$ not equal $m_{sea}$. They are positive for $m_{val}>=m_{sea}$ and negative for $m_{val}=m_{sea}$ and negative for $m_{val}
description: 23 pages, 8 figures
Análise Econômica da Prevenção e Controle do Cancro Cítrico no Estado de São Paulo
Creators: name: Sanches, André Luis Ramos
name: Miranda, Sílvia Helena Galvão De
name: Belasque Junior, José
name: Bassanezi, Renato Beozzo
name: Sanches, André Luis Ramos
name: Miranda, Sílvia Helena Galvão De
name: Belasque Junior, José
name: Bassanezi, Renato Beozzo
Publisher: name: Unknown
Year: 2014
Subjects: subject: Agribusiness
subject: Citrus sector
subject: citrus canker
subject: phytosanitary control
subject: cost-benefit analysis.

description: his paper aims to estimate the benefit-cost ratio of preventing, controlling or managing the citrus canker in São Paulo State, where citrus is a major crop concerning production and jobs. The index of contaminated plots with citrus canker increased 893 percent between 2009 and 2012, right after changes in the State regulation to control the disease, which justifies the importance of analyzing economic impacts. The Cost-Benefit Analysis is applied, once the most relevant benefits and costs involved are identified, to compare the effects over production and costs of production in the farm level. Thus, scenarios are simulated of prevention of canker, control and management under an expansion rate, along a lifetime of 20 years. Results point economic advantages of holding the citrus canker under control in São Paulo, i.e., with low levels of contamination of orchards. Managing the disease only partially, in such a way to face its dissemination along the medium and long term presents a benefit-cost ratio significantly lower than that obtained in the scenarios of prevention and control of canker with a stricter eradication of outbreaks.
A Carcinicultura do Nordeste Brasileiro e sua Inserção em Cadeias Globais de Produção: foco nos APLs do Ceará
Creators: name: Tahim, Elda Fontinele
name: Araújo Junior, Inácio Fernandes De
name: Tahim, Elda Fontinele
name: Araújo Junior, Inácio Fernandes De
Publisher: name: Unknown
Year: 2014
Subjects: subject: Agribusiness
subject: shrimp culture
subject: Local Productive Arrangements
subject: global production chains
subject: government ways.

description: The article makes an analysis of the way of insertion of the shrimp culture in the Northeast Brazil, in particular Local Productive Arrangements (LPA) of shrimp cultivation in the Ceará State, in global production chains and its governance structure because the cultivation systems of these cretaceous are concentrated in the Northeast, and, currently, Ceará is the largest producer of cultured shrimp from Brazil and presents along of its water parting there are two characteristic LPAs (east coast and west coast) that were strongly inserted in the international market through global production chains. The study was based on a survey of secondary data and interviews with the companies’ managers, owners and other LPAs’ agents. Main findings of the research show that the insertion of LPAs of companies still happens quite dependent on large international buyers, and the benefits generated, in large part, are appropriated out of the productive sphere, influencing the productive and innovative capabilities of local producers. The coordination structure is vertical, with some asymmetry degree in power relations between different segments of agents, being the main stages of the value chain controlled, in part, by external agents to arrangements.
NEW ESTIMATES OF WELFARE AND CONSUMER LOSSES IN U.S. FOOD MANUFACTURING
Creators: name: Connor, John M.
name: Peterson, Everett B.
name: Connor, John M.
name: Peterson, Everett B.
Publisher: name: Unknown
Year: 1994
Subjects: Agribusiness

description: In the past 15 years, industrial-organization economists have significantly expanded the range of algorithms for calculating welfare losses due to imperfect competition. We compare eleven empirical estimates of economic losses due to market power in 47 U.S. food manufacturing industries, almost all of them previously unpublished. Each of the studies incorporate different theoretical assumptions about demand conditions, supply conditions, or industry pricing behavior; or they utilize various data sources, time periods, and assumptions about the proper competitive benchmark. The estimates of average allocative losses due imperfect competition range from 0.2 percent to an impossibly high 289 percent of industry output; consumer losses range from 6.0 percent to 816 percent. However, there is a high degree of congruence in the rankings of economic losses due to market power. Hence, from the perspective of antitrust enforcement, the choice of industry targets has not been greatly altered by advances in estimation techniques.
Reconfigurable Parallel Architecture of High Speed Round Robin Arbiter
Creators: name: Paul, Arnab
name: Khan, Mamdudul Haque
name: Rahman, M. Muktadir
name: Khan, Tanvir Zaman
name: Podder, Prajoy
name: Khan, Md. Yeasir Akram
Publisher: name: arXiv
Year: 2020
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Networking and Internet Architecture (cs.NI)
subject: Operating Systems (cs.OS)
subject: FOS: Computer and information sciences

description: With a view to managing the increasing traffic in computer networks, round robin arbiter has been proposed to work with packet switching system to have increased speed in providing access and scheduling. Round robin arbiter is a doorway to a particular bus based on request along with equal priority and gives turns to devices connected to it in a cyclic order. Considering the rapid growth in computer networking and the emergence of computer automation which will need much more access to the existing limited resources, this paper emphasizes on designing a reconfigurable round robin arbiter over FPGA which takes parallel requests and processes them with high efficiency and less delay than existing designs. Proposed round robin arbiter encounters with 4 to 12 devices. Results show that with 200% increment in the number of connected devices, only 2.69% increment has been found in the delay. With less delay, proposed round robin arbiter exhibits high speed performance with higher traffic, which is a new feature in comparison with the existing designs.
description: Published in 2015 International Conference on Electrical, Electronics, Signals, Communication and Optimization (EESCO)
Bundle Theory of Improper Spin Transformations
Creators: name: Cervantes, D. B.
name: Quiroga, S. L.
name: Perissinotti, L. J.
name: Socolovsky, M.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: {\it We first give a geometrical description of the action of the parity operator ($\hat{P}$) on non relativistic spin ${{1}\over{2}}$ Pauli spinors in terms of bundle theory. The relevant bundle, $SU(2)\odot \Z_2\to O(3)$, is a non trivial extension of the universal covering group $SU(2)\to SO(3)$. $\hat{P}$ is the non relativistic limit of the corresponding Dirac matrix operator ${\cal P}=iγ_0$ and obeys $\hat{P}^2=-1$. Then, from the direct product of O(3) by $\Z_2$, naturally induced by the structure of the galilean group, we identify, in its double cover, the time reversal operator ($\hat{T}$) acting on spinors, and its product with $\hat{P}$. Both, $\hat{P}$ and $\hat{T}$, generate the group $\Z_4 \times \Z_2$. As in the case of parity, $\hat{T}$ is the non relativistic limit of the corresponding Dirac matrix operator ${\cal T}=γ^3 γ^1$, and obeys $\hat{T}^2=-1$.}
description: 8 pages, Plaintex; titled changed, minor text modifications, one reference completed
Biofilms as poroelastic materials
Creators: name: Carpio, Ana
name: Cebrian, Elena
name: Vidal, Perfecto
Publisher: name: arXiv
Year: 2024
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Numerical Analysis (math.NA)
subject: Analysis of PDEs (math.AP)
subject: Biological Physics (physics.bio-ph)
subject: Cell Behavior (q-bio.CB)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: FOS: Biological sciences

description: Biofilms are bacterial aggregates encased in a self-produced polymeric matrix which attach to moist surfaces and are extremely resistant to chemicals and antibiotics. Recent experiments show that their structure is defined by the interplay of elastic deformations and liquid transport within the biofilm, in response to the cellular activity and the interaction with the surrounding environment. We propose a poroelastic model for elastic deformation and liquid transport in three dimensional biofilms spreading on agar surfaces. The motion of the boundaries can be described by the combined use of Von Karman type approximations for the agar/biofilm interface and thin film approximations for the biofilm/air interface. Bacterial activity informs the macroscopic continuous model through source terms and residual stresses, either phenomenological or derived from microscopic models. We present a procedure to estimate the structure of such residual stresses, based on a simple cellular automata description of bacterial activity. Inspired by image processing, we show that a filtering strategy effectively smooths out the rough tensors provided by the stochastic cellular automata rules, allowing us to insert them in the macroscopic model without numerical instability.
title: Schéma des études réalisées [Rabat-Salé]
title: Schéma des études réalisées [Rabat-Salé]
Creators: name: :Unkn
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2023
Subjects: subject: Aménagement urbain

description: Cartographie
description: BESM-carto_1954-60-p170-01_60-02
description: 170
description: 60
description: Bulletin économique et social du Maroc
description: Source: Maison méditerranéenne des sciences de l'homme, Cité numérique de la Méditerranée (Cinumed), Bibliothèque nationale du Royaume du Maroc (BNRM)
description: Source: Bulletin économique et social du Maroc
description: Source: Bulletin économique et social du Maroc (BESM) > BESM (Cartographie)
description: Relation: https://cinumed.mmsh.univ-aix.fr/idurl/1/81944
description: Coverage: Maroc
description: Coverage: Salé
description: Coverage: Rabat
description: Coverage: XXe siècle
description: Temporal: XXe siècle
description: Bibliographic citation: « Schéma des études réalisées [Rabat-Salé] », In Bulletin économique et social du Maroc (BESM), n° 60, 1954
description: Provenance: Maison méditerranéenne des sciences de l'homme, Cité numérique de la Méditerranée (Cinumed), Bibliothèque nationale du Royaume du Maroc (BNRM)
description: Provenance: https://cinumed.mmsh.univ-aix.fr/
From the help desk: Swamy's random-coefficients model
Creators: name: Poi, Brian P.
name: Poi, Brian P.
Publisher: name: Unknown
Year: 2003
Subjects: subject: Research Methods/ Statistical Methods
subject: panel data
subject: random-coefficients models

description: This article discusses the Swamy (1970) random-coefficients model and presents a command that extends Stata’s xtrchh command by also providing estimates of the panel-specific coefficients.
Additional file 1 of Prioritising access to pandemic influenza vaccine: a review of the ethics literature
Creators: name: Williams, Jane H.
name: Dawson, Angus
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Cancer
subject: Science Policy
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Additional file 1. Appendix: Papers Included in Review.
Learning from Suspected Target: Bootstrapping Performance for Breast Cancer Detection in Mammography
Creators: name: Xiao, Li
name: Zhu, Cheng
name: Liu, Junjun
name: Luo, Chunlong
name: Liu, Peifang
name: Zhao, Yi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Deep learning object detection algorithm has been widely used in medical image analysis. Currently all the object detection tasks are based on the data annotated with object classes and their bounding boxes. On the other hand, medical images such as mammography usually contain normal regions or objects that are similar to the lesion region, and may be misclassified in the testing stage if they are not taken care of. In this paper, we address such problem by introducing a novel top likelihood loss together with a new sampling procedure to select and train the suspected target regions, as well as proposing a similarity loss to further identify suspected targets from targets. Mean average precision (mAP) according to the predicted targets and specificity, sensitivity, accuracy, AUC values according to classification of patients are adopted for performance comparisons. We firstly test our proposed method on a private dense mammogram dataset. Results show that our proposed method greatly reduce the false positive rate and the specificity is increased by 0.25 on detecting mass type cancer. It is worth mention that dense breast typically has a higher risk for developing breast cancers and also are harder for cancer detection in diagnosis, and our method outperforms a reported result from performance of radiologists. Our method is also validated on the public Digital Database for Screening Mammography (DDSM) dataset, brings significant improvement on mass type cancer detection and outperforms the most state-of-the-art work.
Análise dos contratos na avicultura de corte em Mato Grosso sob a ótica da nova economia institucional (NEI)
Creators: name: Franco, Cleiton
name: Bonjour, Sandra Cristina De Moura
name: Pereira, Benedito Dias
name: Zanini, Talitha Soyara
name: Franco, Cleiton
name: Bonjour, Sandra Cristina De Moura
name: Pereira, Benedito Dias
name: Zanini, Talitha Soyara
Publisher: name: Unknown
Year: 2011
Subjects: subject: Agribusiness
subject: Livestock Production/Industries
subject: New Institucional Economy
subject: Contracts
subject: Attributes of the Transactions
subject: poultry keeping

description: The Brazilian production of poultry meat in 2010 reached 12.230 million tons, a growth of 11.38%, driven by increased consumption and increased exports. Mato Grosso is the 7th. Major national producer in terms of slaughter and production numbers are growing every year, considering the production of soybeans and corn and the possibility of planting new areas, making poultry the star of this new scenario. This article aims to examine contracts of broiler farms in Mato Grosso from the perspective of New Institutional Economics. The theoretical reference provides the concepts of transaction costs and governance structures. The data were derived from contracts related to the integration of poultry production in the period of 2008 and 2009, from the point of view of three companies located in the State of Mato Grosso, Central-West region of Brazil. The results show that the integration contracts have been an important tool for both the integrated companies, which rely on constant production and pre-specified standards to meet the domestic and foreign markets, and to farmers who have in the poultry industry, an activity which gives them guaranteed sales and receipt by the industry. The integration contracts can be considered medium asset specificity, transaction-frequent and reduced uncertainty.
Remark on Natural Models of Neutrinos
Creators: name: Fujikawa, Kazuo
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We comment on what the naturalness argument of 't Hooft implies for a minimal extension of the standard model which incorporates right-handed neutrinos with generic mass terms. If this Lagrangian is taken as a low energy effective theory, the idea of pseudo-Dirac neutrinos with very small masses is consistent with the naturalness argument of 't Hooft. This argument is based on an observation that the right-handed components of neutrinos in the massless limit exhibit an extra enhanced symmetry which is absent in other charged fermions. This enhanced symmetry is reminiscent of the Nambu-Goldstone fermions associated with spontaneously broken supersymmetry. The conventional seesaw scenario gives another natural solution if the ultra-heavy right-handed neutrinos are integrated out in defining a low energy effective theory.
description: 13 pages. Modified the title, abstract and the body of the paper. To be published in Prog. Theor. Phys
CLINICAL ANALYSIS OF ODONTOGENIC HYMORITRI DEVELOPMENT.
Creators: name: Lutfullayev, Doston
name: Burxonov, Muhriddin
name: Xudoyberdiyeva, Muxlisa
Publisher: name: Zenodo
Year: 2025

description: Odontogenic sinusitis is a disease characterized by inflammation of the mucous membrane of the upper jaw due to pathology of the teeth of the upper jaw or complications of dental interference. The cavity of the upper jaw borders on many important anatomical areas, which leads to the development of severe complications, including sinusitis, periostitis, osteomyelitis of the upper jaw, skin fistulas. In recent years, it has been possible to analyze the results of treatment of patients with odontogenic sinusitis, determine the modern diagnosis of the disease, determine its structure and features, evaluate the effectiveness of the selected approaches to surgical treatment, determine optimal, pathogenetically substantiated methods of treating patients depending on the form of the disease.
Study of first-order interface localization-delocalization transition in thin Ising-films using Wang-Landau sampling
Creators: name: Schulz, B. J.
name: Binder, K.
name: M"uller, M.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Using extensive Monte Carlo simulations, we study the interface localization- delocalization transition of a thin Ising film with antisymmetric competing walls for a set of parameters where the transition is strongly first-order. This is achieved by estimating the density of states (DOS) of the model by means of Wang-Landau sampling (WLS) in the space of energy, using both, single-spin-flip as well as N-fold way updates. From the DOS we calculate canonical averages related to the configurational energy, like the internal energy, the specific heat, as well as the free energy and the entropy. By sampling microcanonical averages during simulations we also compute thermodynamic quantities related to magnetization like the reduced fourth order cumulant of the order parameter. We estimate the triple temperatures of infinitely large systems for three different film thicknesses via finite size scaling of the positions of the maxima of the specific heat, the minima of the cumulant and the equal weight criterion for the energy probability distribution. The wetting temperature of the semi-infinite system is computed with help of the Young equation. In the limit of large film thicknesses the triple temperatures are seen to converge towards the wetting temperature of the corresponding semi-infinite Ising model in accordance with standard capillary wave theory. We discuss the slowing down of WLS in energy space as observed for the larger film thicknesses and lateral linear dimensions. In case of WLS in the space of total magnetization we find evidence that the slowing down is reduced and can be attributed to persisting free energy barriers due to shape transitions.
description: 15 pages, 15 figures, uses revtex4
Additional file 1 of Long-term exposure to particulate air pollution and brachial artery flow-mediated dilation in the Old Order Amish
Creators: name: Shabnam Salimi
name: Yanosky, Jeff D.
name: Huang, Dina
name: Montressor-Lopez, Jessica
name: Vogel, Robert
name: Reed, Robert M.
name: Mitchell, Braxton D.
name: Puett, Robin C.
Publisher: name: figshare
Year: 2020
Subjects: subject: Space Science
subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Neuroscience
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Cancer
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: Plant Biology

description: Additional file 1 : Table S1. Polynomial distributed lag (PDL) model posterior probabilities obtained from Bayesian model averaging (BMA) for zero-order through 5th order models using 12 lag periods, for PM2.5 and PM10. Table S2. Associations of PM2.5 and PM10 exposure metrics and FMD stratified by age (less than 50 years vs. 50 years and older) and sex for increases in normalized PM2.5 and PM10 exposure in fully adjusted models. Table S3. Associations of PM2.5 and PM10 exposure metrics and FMD across all participants and by sex for a 10 μg m− 3 increment in PM2.5 and PM10 exposure in fully adjusted models. Figure S1. Effect estimates from the six PDL models (zero-order through 5th order) weighted using BMA as discussed in main text, for: A) PM2.5 and B) PM10. The month prior to FMD measurement (lag zero) and 11 months prior are shown, as well as the cumulative effect over all 12 lag periods.
A crise econômica mundial de 2007 a 2009 e o setor exportador de café no Brasil: análise das perdas
Creators: name: Pereira, Vanessa Da Fonseca
name: Campos, Antonio Carvalho
name: Braga, Marcelo Jose
name: Mendonca, Talles Girardi De
name: Pereira, Vanessa Da Fonseca
name: Campos, Antonio Carvalho
name: Braga, Marcelo Jose
name: Mendonca, Talles Girardi De
Publisher: name: Unknown
Year: 2011
Subjects: subject: Demand and Price Analysis
subject: International Relations/Trade
subject: Volatility
subject: coffee
subject: crisis

description: This study analyzed the Brazilian coffee exporter’s losses between the years 2002 and 2009, by emphasizing the 2007/09 crisis, which affected several sectors and generated instability and uncertainty about the future results of the economic activities. The Brazilian coffee exporting sector is fully inserted in this context, once it acts in the financial markets and it is still subject to the strong variations from the physical market. Thus, the central analysis dealt with the volatility of the exporters returns and was based on auto regressive models with conditional heteroscedaticity (ARCH) and on the Value at Risk (VAR) estimative. As a supplement, the effects from the external demand for the Brazilian coffee and from the exchange rate variation over the Brazilian exporter sector were presented. The results showed that price variation during the years 2008 and 2009 did not generate losses higher than those caused by other crisis, occurred between the years 2000 and 2009. The existence of exporting gains from exchange revenue was noticed. These gains were important to minimize the effects from the decline of the volume and price of the exports, due to the drop of the worldwide consumption.
Higher Monodromy
Creators: name: Polesello, Pietro
name: Waschkies, Ingo
Publisher: name: arXiv
Year: 2004
Subjects: subject: Algebraic Topology (math.AT)
subject: Category Theory (math.CT)
subject: FOS: Mathematics
subject: 14A20, 55P99, 18G50

description: For a given category C and a topological space X, the constant stack on X with stalk C is the stack of locally constant sheaves with values in C. Its global objects are classified by their monodromy, a functor from the Poincare groupoid of X to C. In this paper we recall these notions from the point of view of higher category theory and then define the 2-monodromy of a locally constant stack with values in a 2-category as a 2-functor from the homotopy 2-groupoid into the 2-category. We show that 2-monodromy classifies locally constant stacks on a reasonably well-behaved space X. As an application, we show how to recover from this classification the cohomological version of a classical theorem of Hopf, and we extend it to the non abelian case.
description: 43 pages. This is a revised version of our preprint RIMS 1432 (11-2003)
Minimal Superstrings and Loop Gas Models
Creators: name: Gaiotto, Davide
name: Rastelli, Leonardo
name: Takayanagi, Tadashi
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We reformulate the matrix models of minimal superstrings as loop gas models on random surfaces. In the continuum limit, this leads to the identification of minimal superstrings with certain bosonic string theories, to all orders in the genus expansion. RR vertex operators arise as operators in a Z_2 twisted sector of the matter CFT. We show how the loop gas model implements the sum over spin structures expected from the continuum RNS formulation. Open string boundary conditions are also more transparent in this language.
description: 36 pages, 3 figures
Investigating the use of routine malaria surveillance data to evaluate the effectiveness of pyrethroid vector control interventions
Creators: name: Hellewell, Joel
Publisher: name: Imperial College London
Year: 2018

description: Malaria control is increasingly being tailored to local needs, this is especially necessary in humanitarian settings where resources are poor. Pyrethroids are the most widely used class of insecticides for mosquito control. Using them effectively requires measuring their epidemiological impact and understanding how this is reduced by the emergence of pyrethroid resistance in mosquitoes. In the first two chapters of this thesis, I consider how we could measure the impact of pyrethroids using the prevalence of infection in pregnant women, a potentially cheaper and more reliable alternative to clinical incidence or prevalence in children. In Chapter 2, I fit a Bayesian regression model to show that the malaria burden measured at hospitals near internally displaced populations is higher than the regional average. In Chapter 3, I demonstrate that the prevalence of infection in pregnant women and the clinical incidence in children change together over time. Collecting routine data from pregnant women seems promising as a measure for assessing malaria burden trends. In the second half of the thesis I explore the impact of different pyrethroid-based interventions in a variety of contexts. In Chapter 4, I expand an existing mathematical model of malaria transmission to predict the impact of distributing emanators (a type of spatial repellent) where insecticidal nets are not commonplace. In Chapter 5, I establish how outdoor evening biting could sustain transmission in places where insecticidal nets are used but residual transmission remains. In Chapter 6, I investigate a sub-lethal effect of pyrethroid bed nets that I call temporary feeding inhibition, mosquitoes that are exposed to pyrethroids do not die but are unable to bite humans for a short while afterwards. Together the work shows how statistical and transmission dynamics models can be used to understand the efficacy of vector control interventions and measure their effectiveness in the field.
InterEvo-TR: Interactive Evolutionary Test Generation With Readability Assessment
Creators: name: Delgado-Pérez, Pedro
name: Ramírez, Aurora
name: Valle-Gómez, Kevin J.
name: Medina-Bulo, Inmaculada
name: Romero, José Raúl
Publisher: name: arXiv
Year: 2024
Subjects: subject: Software Engineering (cs.SE)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences
subject: D.2.5; I.2.8
subject: 68T20

description: Automated test case generation has proven to be useful to reduce the usually high expenses of software testing. However, several studies have also noted the skepticism of testers regarding the comprehension of generated test suites when compared to manually designed ones. This fact suggests that involving testers in the test generation process could be helpful to increase their acceptance of automatically-produced test suites. In this paper, we propose incorporating interactive readability assessments made by a tester into EvoSuite, a widely-known evolutionary test generation tool. Our approach, InterEvo-TR, interacts with the tester at different moments during the search and shows different test cases covering the same coverage target for their subjective evaluation. The design of such an interactive approach involves a schedule of interaction, a method to diversify the selected targets, a plan to save and handle the readability values, and some mechanisms to customize the level of engagement in the revision, among other aspects. To analyze the potential and practicability of our proposal, we conduct a controlled experiment in which 39 participants, including academics, professional developers, and student collaborators, interact with InterEvo-TR. Our results show that the strategy to select and present intermediate results is effective for the purpose of readability assessment. Furthermore, the participants' actions and responses to a questionnaire allowed us to analyze the aspects influencing test code readability and the benefits and limitations of an interactive approach in the context of test case generation, paving the way for future developments based on interactivity.
description: 17 pages, 10 figures, 5 tables, journal paper
Quantum Superposition Principle and Geometry
Creators: name: Corichi, Alejandro
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: If one takes seriously the postulate of quantum mechanics in which physical states are rays in the standard Hilbert space of the theory, one is naturally lead to a geometric formulation of the theory. Within this formulation of quantum mechanics, the resulting description is very elegant from the geometrical viewpoint, since it allows to cast the main postulates of the theory in terms of two geometric structures, namely a symplectic structure and a Riemannian metric. However, the usual superposition principle of quantum mechanics is not naturally incorporated, since the quantum state space is non-linear. In this note we offer some steps to incorporate the superposition principle within the geometric description. In this respect, we argue that it is necessary to make the distinction between a 'projective superposition principle' and a 'decomposition principle' that extend the standard superposition principle. We illustrate our proposal with two very well known examples, namely the spin 1/2 system and the two slit experiment, where the distinction is clear from the physical perspective. We show that the two principles have also a different mathematical origin within the geometrical formulation of the theory.
description: 10 pages, no figures. References added. V3 discussion expanded and new results added, 14 pages. Dedicated to Michael P. Ryan on the occasion of his sixtieth bithday
title: Podstawy teorii ergodycznej
Creators: name: Balcerzak, Marek
Publisher: name: Wydawnictwo Politechniki Łódzkiej
Year: 2022

description: Teoria ergodyczna ma swoje korzenie w zagadnieniach fizycznych związanych z mechaniką statystyczną. Jednakże z czasem ustanowiła ona samodzielny kierunek badań, który przeżywa duży rozwój w ostatnich latach z uwagi na istotne zastosowania w innych działach matematyki...
Skrypt ogranicza się do podstawowej wiedzy z teorii ergodycznej.
Direct simulations of helical Hall-MHD turbulence and dynamo action
Creators: name: Mininni, P. D.
name: Gómez, D. O.
name: Mahajan, S. M.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Direct numerical simulations of turbulent Hall dynamos are presented. The evolution of an initially weak and small scale magnetic field in a system maintained in a stationary turbulent regime by a stirring force at a macroscopic scale is studied to explore the conditions for exponential growth of the magnetic energy. Scaling of the dynamo efficiency with the Reynolds numbers is studied, and the resulting total energy spectra are found to be compatible with a Kolmogorov type law. A faster growth of large scale magnetic fields is observed at intermediate intensities of the Hall effect.
description: 13 pages, 17 figures, ApJ (in press)
Modernização da agricultura nos municípios do nordeste paraense: determinantes e hierarquização no ano de 2006
Creators: name: Rebello, Fabricio Khoury
name: Santos, Marcos Antonio Souza Dos
name: Homma, Alfredo Kingo Oyama
name: Rebello, Fabricio Khoury
name: Santos, Marcos Antonio Souza Dos
name: Homma, Alfredo Kingo Oyama
Publisher: name: Unknown
Year: 2011
Subjects: subject: Community/Rural/Urban Development
subject: Factor Analysis
subject: Rural Development - State of Pará
subject: Environment

description: This paper analysis the level of agricultural modernization in the Northeast region of Pará State in 2006, as well as changes occurred in relation to the previous decade. To describe the technological standard and the relative ranking of municipalities, we used the factor analyzes statistical method to construct a ratio of agricultural modernization. The results showed the existence of a large discrepancy in technological level between the municipalities analyzed,. Of the 49 municipalities examined, only ten have reached the level of modernization above 50% (the highest level is 1). They are: Capitão Poço, Curuçá, Igarapé-Açu, Moju, Peixe-Boi, Santarém Novo, São João da Ponta, São Miguel do Guamá, Tailândia, and Tomé-Açu. On the other hand, 17 municipalities expressed technological level of 3, the lowest one. They are: São Domingos do Capim, Cametá, Oeiras do Pará, Colares and Limoeiro do Ajuru with the worst rankings. These studies are fundamental to orient public policies focusing on sustainable rural development in the Amazon, especially in the Northeast of Pará.