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Rumo à 'metapsicologia dos limites': o diálogo possível entre a teoria pulsional e a teoria das relações de objeto e algumas de suas consequências - Freud, Winnicott e Green; Towards metapsychology of limits: the possible dialogue between drive theory and object relational theory and some of its consequences Freud, Winnicott and Green

Junqueira, Camila
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 26/03/2010 Português
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Este trabalho fundamenta-se na compreensão da metapsicologia dos limites como parte da teoria psicanalítica que visa compreender a estruturação e o funcionamento dos limites do psiquismo, bem como parte da teoria psicanalítica que se destina a compreender a etiologia, o funcionamento e o tratamento das patologias-limite, manifestações decorrentes de falhas na constituição e no funcionamento dos limites do psiquismo. Tem como hipótese de pesquisa que o giro metapsicológico exigido pelos estados-limite se coloca menos no sentido de ampliar a diversidade de modelos teóricos e mais no sentido de fazer dialogar dois modelos teóricos que estão na base do pensamento psicanalítico, mas que foram historicamente separados e considerados incompatíveis, a saber: o modelo pulsional e o modelo das relações objetais. Os objetivos deste trabalho são os de (1) questionar os limites da oposição entre a teoria pulsional de Freud e a teoria relacional de Winnicott, (2) apresentar a alternativa que André Green propõe para essa aparente oposição, argumentando a favor da concepção de pulsão e objeto como um par inseparável, bem como (3) apresentar e discutir algumas consequências metapsicológicas do diálogo possível entre essas duas teorias a partir do estudo de Freud e de Winnicott...

School external evaluation : theory and models; Avaliação externa das escolas : teorias e modelos

Pacheco, José Augusto
Fonte: Universidade do Minho Publicador: Universidade do Minho
Tipo: Conferência ou Objeto de Conferência
Publicado em //2010 Português
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In his search related to the making up of a theory of the field of evaluation, Sobrinho refers to multi-faceted references and complexity as central elements, not only because evaluation is a “field whose domain is disputed by various disciplines and social practices of distinct academic, political and social institutions” but also evaluation is a “social phenomenon,” which can be seen to include “actions, attitudes and values of individuals from diverse backgrounds.” If these words of a renowned author in the field of evaluation serve to characterize evaluation as a complex social activity, on the other hand, they also validate this theoretical incursion of mine into institutional evaluation, because evaluation of a school is an activity that requires specialist knowledge of Curricular Theory and Development. Above all, if this epistemological field would be considered as an interdisciplinary study of educational experience, where the common thinking and in an update of Schwab, are the context (political, social, cultural, economic and ideological), the actors (students, teachers, parents and educational guardians, local authorities, publishing houses, trade unions, etc.) and knowledge. One is dealing with a markedly curricular vision that I intend to include in this contribution not forgetting my situation as a teacher of Theory and Models of Evaluation in the University of Minho but also my experience acquired as an external evaluator of the model...

Neutral theory and the species abundance distribution: recent developments and prospects for unifying niche and neutral perspectives

Matthews, Thomas J; Whittaker, Robert J
Fonte: Blackwell Publishing Ltd Publicador: Blackwell Publishing Ltd
Tipo: Artigo de Revista Científica
Português
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Published in 2001, The Unified Neutral Theory of Biodiversity and Biogeography (UNTB) emphasizes the importance of stochastic processes in ecological community structure, and has challenged the traditional niche-based view of ecology. While neutral models have since been applied to a broad range of ecological and macroecological phenomena, the majority of research relating to neutral theory has focused exclusively on the species abundance distribution (SAD). Here, we synthesize the large body of work on neutral theory in the context of the species abundance distribution, with a particular focus on integrating ideas from neutral theory with traditional niche theory. First, we summarize the basic tenets of neutral theory; both in general and in the context of SADs. Second, we explore the issues associated with neutral theory and the SAD, such as complications with fitting and model comparison, the underlying assumptions of neutral models, and the difficultly of linking pattern to process. Third, we highlight the advances in understanding of SADs that have resulted from neutral theory and models. Finally, we focus consideration on recent developments aimed at unifying neutral- and niche-based approaches to ecology, with a particular emphasis on what this means for SAD theory...

Cooperative Game Theory and its Application to Natural, Environmental, and Water Resource Issues : 1. Basic Theory

Patrone, Fioravante; Zara, Stefano; Parrachino, Irene
Fonte: World Bank, Washington, DC Publicador: World Bank, Washington, DC
Português
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Game theory provides useful insights into the way parties that share a scarce resource may plan their use of the resource under different situations. This review provides a brief and self-contained introduction to the theory of cooperative games. It can be used to get acquainted with the basics of cooperative games. Its goal is also to provide a basic introduction to this theory, in connection with a couple of surveys that analyze its use in the context of environmental problems and models. The main models (bargaining games, transfer utility, and non-transfer utility games) and issues and solutions are considered: bargaining solutions, single-value solutions like the Shapley value and the nucleolus, and multi-value solutions such as the core. The cooperative game theory (CGT) models that are reviewed in this paper favor solutions that include all possible players and ignore the strategic stages leading to coalition building. They focus on the possible results of the cooperation by answering questions such as: Which coalitions can be formed? And how can the coalitional gains be divided to secure a sustainable agreement? An important aspect associated with the solution concepts of CGT is the equitable and fair sharing of the cooperation gains.

Productivity, factor accumulation and social networks: theory and evidence

Grafton, R. Quentin; Kompas, Tom; Owen, P. Dorian
Fonte: Universidade Nacional da Austrália Publicador: Universidade Nacional da Austrália
Tipo: Working/Technical Paper Formato: 729328 bytes; 352 bytes; application/pdf; application/octet-stream
Português
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The paper analyzes how social barriers to communication affect economy-wide productivity and factor accumulation. Using a dynamic model of an economy that includes a reproducible capital stock (physical or human) and effective labor, a negative relationship is shown to exist between social barriers to communication and total factor productivity (TFP), per capita consumption and reproducible capital. Robust estimates obtained from cross-country data are consistent with the models predictions. The theory and empirical results help explain cross-country differences in TFP, the high productivity performance of leading industrialized countries and how productivity catch up may be initiated.; no

Close to the edge of fundamental measure theory: a density functional for hard-sphere mixtures

Cuesta, José A.; Martínez-Ratón, Yuri; Tarazona, Pedro
Fonte: IOP Publishing Publicador: IOP Publishing
Tipo: Artigo de Revista Científica Formato: application/pdf
Publicado em 25/11/2002 Português
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We analyse the structure of the fundamental measure theory for the free energy density functional of hard-sphere mixtures. A comparative study of the different versions of the theory, and other density functional approaches, is carried out in terms of their generic form for the three-point direct correlation function, which shows clearly the main advantages and problems of the different approximations. A recently developed version for the monocomponent case is extended to mixtures of hard spheres with different radii, and a new prescription is presented for obtaining the exact dimensional crossover of those mixtures in the one-dimensional (1D) limit. Numerical results for planar wall–fluid interfaces and for the 1D fluid are presented.; This work is part of the research projects PB97-1223-C02-01 (DGESIC), BFM2001-1679-C03-02 (DGI) and BFM2000-0004 (DGI) of the Ministerio de Ciencia y Tecnología (Spain). Yuri Martínez-Ratón acknowledges financial support fromapostdoctoral grant of the Dirección General de Investigación of the Consejería de Educación de la Comunidad de Madrid (Spain).; 16 pages, 7 figures.-- PACS nrs.: 05.20.Jj, 61.20.Gy, 61.25.Em.-- ArXiv pre-print available at: http://arxiv.org/abs/cond-mat/0205256; Final publisher version available Open Access at: http://gisc.uc3m.es/~cuesta/papers-year.html

On the complementarity of classical test theory and item response models: item difficulty estimates and computerized adaptive testing

Costa,Patrícia; Ferrão,Maria Eugénia
Fonte: Fundação CESGRANRIO Publicador: Fundação CESGRANRIO
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/09/2015 Português
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This study aims to provide statistical evidence of the complementarity between classical test theory and item response models for certain educational assessment purposes. Such complementarity might support, at a reduced cost, future development of innovative procedures for item calibration in adaptive testing. Classical test theory and the generalized partial credit model are applied to tests comprising multiple choice, short answer, completion, and open response items scored partially. Datasets are derived from the tests administered to the Portuguese population of students enrolled in the 4th and 6th grades. The results show a very strong association between the estimates of difficulty obtained from classical test theory and item response models, corroborating the statistical theory of mental testing.

A novel project management theory and its applicability

Erguner, Abdulkerim.
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Tipo: Tese de Doutorado Formato: xvi, 95 p. ;
Português
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Software Project Management is an emerging discipline. The software project manager's job comprises every aspect of the project from starting the project to closing out. Practitioner's of the discipline use several project management tools in managing diverse aspects of software projects. However, there is no existing management theory that combines different aspects of a software project and results in a complete picture. This study discusses a theory and modeling language which combine several management aspects of software projects into concrete models to aid the software project manager. The mathematical relations and graphical models derived from the theory comprise entire entities and activities of a project determined by the project team and depict any kind of relationships between the entities and activities including stakeholders. The theory provides a mathematical model for software projects and the modeling language provides graphical models of software projects representing the mathematical model. This study tests the theory and the modeling language in two case studies for applicability. The results indicate that the theory and the modeling language are applicable to real world projects and show promise to be a valuable software project management tool.; Turkish Air Force author.

Sequence Diagrams Integration via Typed Graphs: Theory and Implementation

LIANG, HONGZHI
Fonte: Quens University Publicador: Quens University
Tipo: Tese de Doutorado Formato: 2553268 bytes; application/pdf
Português
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It is widely accepted within the software engineering community that the support for integration is necessary for requirement models. Several methodologies, such as the role-based software development, that have appeared in the literature are relying on some kind of integration. However, current integration techniques and their tools support are insufficient. In this research, we discuss our solution to the problem. More precisely, we present a general integration approach for scenario-based models, particularly for UML Sequence Diagrams, based on the colimit construction known from category theory. In our approach, Sequence Diagrams are represented by SD-graphs, a special kind of typed graphs. The merge algorithm for SD-graphs is an extension of existing merge operations on sets and graphs. On the one hand, the merge algorithm ensures traceability and guarantees key theoretical properties (e.g., “everything is represented and nothing extra is acquired” during the merge). On the other hand, our formalization of Sequence Diagrams as SD-graphs retains the graphical nature of Sequence Diagrams, yet is amenable to algebraic manipulations. Another important property of our process is that our approach is applicable to other kinds of models as long as they can be represented by typed graphs. A prototype Sequence Diagram integration tool following the approach has been implemented. The tool is not only a fully functional integration tool...

A teoria na prática é outra? Considerações sobre as relações entre teoria e prática em discursos educacionais; Is theory different in practice? Reflections on the relationship between theory and practice in educational discourses; La teoría es outra en la práctica? Consideraciones acerca de las relaciones entre teoría y práctica en los discursos educativos

Carvalho, José Sérgio Fonseca de
Fonte: Editora Autores Associados Publicador: Editora Autores Associados
Tipo: Artigo de Revista Científica
Português
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O tema das relações entre teoria e prática na formação de professores é um caso particular de um problema amplo e complexo, cujos esforços de elucidação remontam ao próprio início da tradição filosófica. No presente artigo, ele é focalizado a partir de sua incidência em duas modalidades de discurso pedagógico que exerceram grande influência na formação de professores ao longo do século XX: as teorias da educação vinculadas a grandes sistemas filosóficos e os discursos pedagógicos construtivistas de Jean Piaget. O artigo examina as tentativas de transposição de teorias desses campos para os da prática educativa, ressaltando o caráter abstrato de prescrições que ignoram as práticas e os problemas característicos da cultura do trabalho escolar e dos princípios éticos e políticos que historicamente se associaram aos ideais da escolarização.; Discussions concerning the relationship between theory and practice in teachers' preparation courses are a particular topic of a long lasting and wide subject, which may go as far back as the beginning of our philosophical tradition. In this article it is analyzed through the exam of two very influential models of pedagogical discourses: the first one which derives theories of education from the great philosophical systems and Jean Piaget's constructivist approach to education. The article analyses the attempts of transplanting theories from these two fields to educational practice...

Ferrohydrodynamic flows in uniform and non-uniform rotating magnetic fields

He, Xiaowei, Ph. D. Massachusetts Institute of Technology
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 241, A1-A26 p.
Português
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Ferrofluids are conventionally used in such DC magnetic field applications as rotary and exclusion seals, stepper motor dampers, and heat transfer fluids. Recent research demonstrates ferrofluid use in alternating and rotating magnetic fields for MEMS/NEMS application of microfluidic devices and bio-applications such as targeted drug delivery, enhanced Magnetic Resonance Imaging, and hypothermia. This thesis studies ferrofluid ferrohydrodynamics in uniform and non-uniform rotating magnetic fields through modeling and measurements of ferrofluid torque and spin-up flow profiles. To characterize the water-based and oil-based ferrofluids used in the experiments, measurements were made of the mass density, surface tension, viscosity, magnetization curve, nanoparticle size, and the speed of sound. Initial analysis for planar Couette and Poiseuille flows exploit DC magnetic field effects on flow and spin velocities with zero spin viscosity. Above critical values of magnetic field strength and flow velocity, multiple values of magnetic field, spin velocity, and effective magnetoviscosity result, indicating that zero spin viscosity may be non-physical. Torque and spin-up flow profile measurements show the effect of volume torque density and body force density in uniform and non-uniform rotating magnetic fields.; (cont.) Ferrofluid "negative viscosity" measurements in uniform and non-uniform rotating magnetic fields occur when magnetic field induced flow creates torque that exceeds the torque necessary to drive a viscometer spindle. Numerical simulations of torque and spin-up flow in uniform and non-uniform rotating magnetic fields...

Asymptotic Spectral Measures: Between Quantum Theory and E-theory

Trout, Jody
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 19/09/2003 Português
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We review the relationship between positive operator-valued measures (POVMs) in quantum measurement theory and asymptotic morphisms in the C*-algebra E-theory of Connes and Higson. The theory of asymptotic spectral measures, as introduced by Martinez and Trout (CMP 226), is integrally related to positive asymptotic morphisms on locally compact spaces via an asymptotic Riesz Representation Theorem. Examples and applications to quantum physics, including quantum noise models, semiclassical limits, pure spin one-half systems and quantum information processing will also be discussed.; Comment: To appear in Proceedings of the International IPSI-2003 VIP Forum Conference in Sveti Stefan, Montenegro, October 4-11, 2003. 10 pages

Matrix Integrals, Symmetric Functions theory and matrix integrals

Orlov, A. Yu.
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 17/07/2002 Português
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We consider certain scalar product of symmetric functions which is parameterized by a function $r$ and an integer $n$. One the one hand we have a fermionic representation of this scalar product. On the other hand we get a representation of this product with the help of multi-integrals. This gives links between a theory of symmetric functions, soliton theory and models of random matrices (such as a model of normal matrices).; Comment: Latex, 59 pages, no figures

Local Models in F-Theory and M-Theory with Three Generations

Bourjaily, Jacob L.
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Português
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We describe a general framework that can be used to geometrically engineer local, phenomenological models in F-theory and M-theory based on ALE-fibrations, and we present several concrete examples of such models that feature three generations of matter with semi-realistic phenomenology. We show that the geometric structures required for generating interactions--triple-intersections of matter-curves in F-theory and supersymmetric three-cycles supporting multiple conical singularities in M-theory--are generic in such ALE-fibred manifolds, and that they can be understood in correspondence with one another. The models we can construct in this way are strictly limited in complexity by the maximality of the E8-ALE space, but turn out to be just complex enough to accommodate some of the most realistic string models to date.; Comment: 53 pages, 9 figures, 12 tables. references added, minor corrections

Gauge Fluxes in F-theory and Type IIB Orientifolds

Krause, Sven; Mayrhofer, Christoph; Weigand, Timo
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Português
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We provide a detailed correspondence between G_4 gauge fluxes in F-theory compactifications with SU(n) and SU(n)x(1) gauge symmetry and their Type IIB orientifold limit. Based on the resolution of the relevant F-theory Tate models we classify the factorisable G_4-fluxes and match them with the set of universal D5-tadpole free U(1)-fluxes in Type IIB. Where available, the global version of the universal spectral cover flux corresponds to Type IIB gauge flux associated with a massive diagonal U(1). In U(1)-restricted Tate models extra massless abelian fluxes exist which are associated with specific linear combinations of Type IIB fluxes. Key to a quantitative match between F-theory and Type IIB is a proper treatment of the conifold singularity encountered in the Sen limit of generic F-theory models. We also shed further light on the brane recombination process relating generic and U(1)-restricted Tate models.; Comment: 53 pages, 3 figures; v2: Refs added; v3: minor corrections to match version published in JHEP

Parametric Representation of Rank d Tensorial Group Field Theory: Abelian Models with Kinetic Term $\sum_{s}|p_s| + \mu$

Geloun, Joseph Ben; Toriumi, Reiko
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 01/09/2014 Português
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We consider the parametric representation of the amplitudes of Abelian models in the so-called framework of rank $d$ Tensorial Group Field Theory. These models are called Abelian because their fields live on $U(1)^D$. We concentrate on the case when these models are endowed with particular kinetic terms involving a linear power in momenta. New dimensional regularization and renormalization schemes are introduced for particular models in this class: a rank 3 tensor model, an infinite tower of matrix models $\phi^{2n}$ over $U(1)$, and a matrix model over $U(1)^2$. For all divergent amplitudes, we identify a domain of meromorphicity in a strip determined by the real part of the group dimension $D$. From this point, the ordinary subtraction program is applied and leads to convergent and analytic renormalized integrals. Furthermore, we identify and study in depth the Symanzik polynomials provided by the parametric amplitudes of generic rank $d$ Abelian models. We find that these polynomials do not satisfy the ordinary Tutte's rules (contraction/deletion). By scrutinizing the "face"-structure of these polynomials, we find a generalized polynomial which turns out to be stable only under contraction.; Comment: 69 pages, 35 figures

Study of Planar Models in Quantum Mechanics, Field theory and Gravity

Kumar, Sarmistha
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 28/08/2014 Português
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Instantons, monopoles and vortices have become paradigms of topological structures in field theory and quantum mechanics, with important applications in particle physics, astrophysics, condensed matter physics and mathematics. We have discussed here the self-dual Chern-Simons theory specially in (2+1) dimensions. we start with a relevant topological quantum mechanical model (such as Landau problem consisting of two basic chiral oscillators) and extrapolate the analysis to (2+1)dimensional vector field theory. Aspects of selfdual symmetry in topologically massive gravity model were also considered using three different approaches. We have demonstrated how duality symmetric (or chiral) actions are already present in the quantum mechanical examples such as in usual harmonic oscillator. Using the chiral oscillator form, we will briefly develop the key concepts of the soldering mechanism. We have also discussed the non commutative property of such quantum models. Models involving higher order derivative of Abelian CS-term in (2+1)dimensions, specially the leading third order derivative Chern-Simons term were studied; Inclusion of this term with usual Maxwell term or with CS term or to both of these terms reveals many interesting observations. We have also described the spin 2 tensor models which appear in discussions of linearised gravity in (2 + 1) dimensions.; Comment: Ph.D Thesis Awarded by the University of Calcutta (2014). arXiv admin note: text overlap with arXiv:hep-th/9806005 by other authors

F-theory and the LHC: Stau Search

Heckman, Jonathan J.; Shao, Jing; Vafa, Cumrun
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Português
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F-theory GUT models favor a relatively narrow range of soft supersymmetry breaking parameters in the MSSM Lagrangian. This leads to the specific predictions that a 10-100 MeV mass gravitino is the LSP, and the NLSP is quasi-stable, with a lifetime between a second to an hour. In a wide range of parameter space, the NLSP turns out to be a stau, though a bino-like lightest neutralino is also possible. Focusing on F-theory GUTs with a stau NLSP, we study the discovery potential at the LHC for such scenarios. Models with a quasi-stable stau predict a striking signature of a heavy charged particle passing through the detector. As a function of the parameters of minimal F-theory GUTs, we study how many of such events to expect, and additional signatures correlated with the presence of quasi-stable staus. We also study the prospects for staus to become stopped in or near the detector, as well as potential ways to distinguish such models from minimal gauge mediation models with similar spectra.; Comment: v2: 75 pages, 29 figures, references added

Effective Field Theories for Local Models in F-Theory and M-Theory

Bourjaily, Jacob L.
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 04/05/2009 Português
Relevância na Pesquisa
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Requiring a strictly local origin of visible sector phenomenology is perhaps the strongest, most falsifiable condition that one can impose on string theory at the high scale: it at once excludes a vast majority of the string landscape, and yet leads naturally to constructions that can be surprisingly realistic (and familiar). Yet only for local models can gravity be made parametrically weak while keeping the strength of gauge- and Yukawa-couplings fixed--a limit which is well-motivated by low-energy experiments. Conveniently, the entire class of high-scale effective field theories that can arise from such local models in F-theory and M-theory can be classified according to simple, purely group-theoretic rules. In this note, we describe these rules from the viewpoint of an effective field theorist with little interest in the underlying geometry or high-scale physics, and we discuss the general predictions these models have for low-energy phenomenology.; Comment: 11 pages, 1 table

Norms and games: Realistic moral theory and the dynamic analysis of cooperation.

Spiekermann, Kai
Fonte: London School of Economics and Political Science Thesis Publicador: London School of Economics and Political Science Thesis
Tipo: Thesis; NonPeerReviewed Formato: application/pdf
Publicado em //2008 Português
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The thesis investigates how social norms are enforced. It consists of two parts. The first part establishes the concept of "realistic constraints for moral theory" based on the "ought implies can principle". Different notions of feasibility lead to different degrees of moral realism. Game theory and computational modelling are the appropriate instruments to determine feasibility constraints for realistic moral theory. They allow for a dynamic perspective on norm enforcement, in contrast to more static approaches. The thesis discusses the use of computational models and game theory from a philosophy-of-science point of view. I conclude that computational models and game theory can inform moral theory if they are understood as sources of realistic constraints. The second part uses two agent-based models to explain the enforcement of social norms. In the first model, agents play one-shot, two-person prisoner's dilemmas. Before the game, agents have a better than random chance to predict which strategy the others are going to play. Cooperative agents do well if they are able to pool their information on the strategies of others and exclude defectors. The second model analyses repeated multi-person prisoner's dilemmas with anonymous contributions. The players are situated in a social space represented by a graph. Agents can influence with whom they are going to play in future rounds by severing ties. Cooperative agents do well because they are able to change the interaction network structure. I conclude by connecting the findings with debates in moral philosophy and evolutionary theory. The results obtained have implications not only for the emergence of cooperation and social norms literature...