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Timing and structure of the 8.2 kyr BP event inferred from delta(18)O records of stalagmites from China, Oman, and Brazil

CHENG, Hai; FLEITMANN, Dominik; EDWARDS, R. Lawrence; WANG, Xianfeng; Cruz Júnior, Francisco William da; AULER, Augusto S.; MANGINI, Augusto; WANG, Yongjin; KONG, Xinggong; BURNS, Stephen J.; MATTER, Albert
Fonte: GEOLOGICAL SOC AMER, INC Publicador: GEOLOGICAL SOC AMER, INC
Tipo: Artigo de Revista Científica
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Oxygen isotope records of stalagmites from China and Oman reveal a weak summer monsoon event, with a double-plunging structure, that started 8.21 +/- 0.02 kyr B. P. An identical but antiphased pattern is also evident in two stalagmite records from eastern Brazil, indicating that the South American Summer Monsoon was intensified during the 8.2 kyr B. P. event. These records demonstrate that the event was of global extent and synchronous within dating errors of <50 years. In comparison with recent model simulations, it is plausible that the 8.2 kyr B. P. event can be tied in changes of the Atlantic Meridional Overturning Circulation triggered by a glacial lake draining event. This, in turn, affected North Atlantic climate and latitudinal position of the Intertropical Convergence Zone, resulting in the observed low-latitude monsoonal precipitation patterns.; Gary Comer Science & Education Foundation[CC8]; Gary Comer Science & Education Foundation; U. S. National Science Foundation (NSF)[0214041]; U. S. National Science Foundation (NSF); U. S. National Science Foundation (NSF)[0116395]; U. S. National Science Foundation (NSF); U. S. National Science Foundation (NSF)[023239]; U. S. National Science Foundation (NSF); Natural Science Foundation of China[40631003]; Natural Science Foundation of China; Swiss National Science Foundation (SNSF); Swiss National Science Foundation (NSF)[PP002-110554/1]

O impacto do anúncio e da adesão das ações aos níveis diferenciados de governança corporativa no Brasil; The effect of differentiated levels of corporate governance on brazilian stock price: a study event to the announcement and adherence

Nakayasu, Gilberto Noboru
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 07/11/2006 Português
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As práticas de governança corporativa visam mitigar os problemas oriundos da relação de agência, que surgem quando há a separação entre propriedade e controle da empresa. A Bovespa, no final do ano de 2000, introduziu o conceito de níveis diferenciados de práticas de governança corporativa, em que as empresas, para obter um dos selos (Nível 1, Nível 2 ou Novo Mercado), devem seguir determinadas regras de práticas de governança. Esta dissertação tem como objetivo analisar se os preços das ações das companhias brasileiras possuem relação com sua decisão de adotar um dos níveis diferenciados de práticas de governança corporativa da Bovespa, divulgadas por meio de anúncios em jornais ou por adesão (por meio do registro) a um dos níveis de governança corporativa diferenciada na Bovespa. A pesquisa abrange o período de janeiro de 2001 a janeiro de 2006. Busca-se, dessa forma, aferir a eficiência informacional do mercado na forma semiforte. Essa análise é realizada por meio do retorno anormal das ações, considerando-se duas datas distintas de evento: a primeira como sendo a data em que ocorreu o anúncio em jornais da adesão a um dos níveis diferenciados de governança corporativa, constituindo a amostra da ?Data do Anúncio?; e a segunda...

Espaço e evento: considerações críticas sobre a arquitetura contemporânea; Space and event: critical considerations about contemporary architecture

Sperling, David Moreno
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 18/04/2008 Português
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Esta tese de doutorado reflete sobre a possibilidade de existência de um campo de mobilidade para a ação crítica da arquitetura no mundo contemporâneo, marcado por consensos nas esferas social, econômica, política e cultural. O trabalho toma como noções fundamentais para as suas proposições os termos espaço e evento (e noções que eles ativam: experiência, sujeito, corpo, tempo), a partir dos quais lança as seguintes hipóteses. A primeira, a de que a noção de evento, segundo a filosofia de Alain Badiou, traria abertura para investigações críticas sobre o projeto e práticas de espacialização na arquitetura contemporânea. E a segunda, a de que esta noção levaria à reconsideração da relação entre estética e política no campo da arquitetura. O trabalho toma como seu ponto de partida a sistematização e problematização da teoria crítica de arquitetura de Bernard Tschumi baseada na relação espaço-evento. Num segundo momento, procura elucidar como uma certa noção de evento foi apropriada pela esfera cultural contemporânea e apresentar as lógicas com que ele aparece não só nesta esfera, mas em uma arquitetura que extensamente tem se transformado em sua correlata. A análise das duas concepções anteriores da relação espaço-evento sinaliza a necessidade de investigação de outros campos de ação crítica para a arquitetura e mesmo para a própria relação espaço-evento. Realizamos num terceiro momento...

Rhythmic movement: The role of expectancy and skill in event and emergent timing; Movimentos rítmicos: o papel de expectativas e treino no controle temporal de movimentos contínuos e discretos

Janzen, Thenille Braun
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 26/05/2014 Português
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Recent investigations suggest that rhythmic movements rely on two distinct timing systems: event and emergent timing. Event timing is based on an explicit internal representation of the temporal interval marked by clear perceptual detectible events whereas emergent timing is derived from the dynamics of smooth and continuous movements. However, crucial aspects of the distinction between these mechanisms remain unclear. This thesis investigates the role of expectancy and skill in the internal representation of time in event timing and emergent timing. Chapter 1 introduces the theoretical framework that supports the differentiation between event and emergent timing mechanisms and presents the hypotheses that were tested. Chapter 2 describes a series of five experiments that investigated the role of expectancy through examining the effect of a single unexpected perturbation of feedback content (e.g. pitch, timbre, intensity) on timing of finger tapping. Chapter 3 expands this question by investigating the effect of unexpected auditory perturbations on two types of timed movements: event and emergent timing. The role of expertise and training on motor timing is the subject of discussion of Chapters 4 to 6 where a total of 4 experiments tested the effect of expertise and music training on accuracy of finger tapping and circle drawing tasks. More specifically...

Synthesis of supervisors for time-varying discrete event systems

Costa,Eduard Montgomery Meira; Lima,Antonio Marcus Nogueira
Fonte: Sociedade Brasileira de Automática Publicador: Sociedade Brasileira de Automática
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/12/2004 Português
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We introduce a time-varying automaton to model discrete event systems. The structure of this time-varying automaton is very similar structure to (max,+) automaton, but allowing variable event lifetimes. Based on this time-varying automaton the design of timed supervisors is obtained by using the dioid algebra, where the languages used to describe the discrete event system as well the desired specification are replaced by matrices defined in such algebra and the supervisor synthesis is achieved through simple matrix operations. The proposed synthesis algorithm allows one to synthesize supervisors for un-timed DES, timed DES with constant event lifetime and timed DES with variable event lifetime. All these cases are treated with the same basic algorithm, the differences rely only on the definition of the event lifetime functions. The proposed algorithm presents a complexity order equal to the supervisor synthesis algorithm of un-timed discrete event systems. The proposed approach can be considered as an alternative procedure, based on a non-traditional algebraic structure, to achieve the supervisor synthesis for discrete event systems.

Assessment of market efficiency in Argentina, Brazil and Chile: an event study of mergers and acquisitions

Simões,Mario Domingues; Macedo-Soares,T. Diana L. van Aduard de; Klotzle,Marcelo Cabus; Pinto,Antonio Carlos Figueiredo
Fonte: ANPAD - Associação Nacional de Pós-Graduação e Pesquisa em Administração Publicador: ANPAD - Associação Nacional de Pós-Graduação e Pesquisa em Administração
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2012 Português
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This paper presents an investigation into the relationship between the announcement of mergers and acquisitions, the existence of positive abnormal returns for shares of these firms, and market efficiency in Argentina, Brazil and Chile. Statistically significant Standardized Abnormal Returns were present in the event announcement and the following days in Argentina and Chile and on the event day in Brazil, confirming value creation signaling. Furthermore, the significance of abnormal returns in the event window, namely in the 5 days following the event in Argentina and Chile and the absence of such in Brazil suggests a more efficient market exists in Brazil, in keeping with the semi-strong market efficiency hypothesis. The absence of semi-strong efficient market behavior could prove valuable to investors who could use a window of a few days after the event announcement to accumulate abnormal returns, provided the appropriate research into news of possible mergers or acquisitions has been made.

Verb alternations and event structure in children with specific language impairment compared with typically developing children. What can we learn from the story of Cinderella?

Whelan, Jennifer; Murphy, Carol-Anne
Fonte: University of Limerick Publicador: University of Limerick
Tipo: info:eu-repo/semantics/masterThesis; all_ul_research; ul_theses_dissertations
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non-peer-reviewed; Background: Children with Specific Language Impairment (CwSLI) demonstrate difficulties with verb knowledge, verb argument production and sentence structure. There is a lack of evidence around the processing and production of event structure by CwSLI and research is equivocal whether CwSLI demonstrate difficulty with verb alternations. Aims: The study aimed to establish whether verb alternations and event structure complexity are contributing to the aforementioned difficulties in CwSLI, and whether verb knowledge has a role in event structure complexity. The study also aimed to investigate the usefulness of a Cinderella narrative for assessment. Methods and Procedures: Secondary data analysis of Cinderella narratives from 65 typically developing children (TDC) (3; 02 – 10; 09) and 17 CwSLI (6; 05 – 10; 01) was undertaken. A between-groups comparison on verb alternations and the complexity of event structure produced was run between CwSLI and subgroups of younger and older TDC and a verb comprehension matched group. Outcomes and Results: The number of alternations was insufficient to warrant statistical analysis. Older TDC used a significantly higher number of simple event structures than CwSLI, but there was no difference in complex event structures produced. No significant difference was found between CwSLI and the verb comprehension control group in event structure produced. All children used more simple event structure verbs overall. Conclusions and Implications: The results of the event structure analyses indicate that all children may be using the most parsimonious way of describing events. The results support the idea that poor verb knowledge and event structure complexity are related in CwSLI. Difficulty with event conceptualisation may have a cascading effect onto the lexical representation of a verb and consequently limit the range of syntactic structures available. The Cinderella narrative is a useful clinical tool for investigating verb production...

Verb alternations and event structure in children with SLI compared with typically developing children. What can we learn from the story of Cinderella?

Doyle, Katie
Fonte: University of Limerick Publicador: University of Limerick
Tipo: info:eu-repo/semantics/masterThesis; all_ul_research; ul_theses_dissertations
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non-peer-reviewed; Background: Children with specific language impairment (CwSLI) often present with difficulties in areas of language including verb knowledge and verb-argument production. Previous research has investigated verb diversity and verb-argument structure. There is limited knowledge on the processing of event structure by CwSLI and the research around verb alternations is inconclusive. Aims: The research aimed to investigate verb alternations and the complexity of event structures produced by CwSLI compared to typically developing children (TDC). Methods and Procedures: The procedure involved secondary data analysis of an existing data set comprising Cinderella narratives elicited from 65 TDC and 17 CwSLI. The narratives were analysed for verb alternations and event structures of verbs. The participants were compared with subgroups of younger and older TDC and a vocabulary-matched (verb comprehension) group. Outcomes and Results: A total of 31 verbs which could alternate were identified across the dataset. Of these, only the verbs turn into and transform were alternated by two CwSLI and nine TDC. There was a significant difference between CwSLI and TD older children (aged >6; 05) on MLU-w (p=.003), number of verbs (p=.004) and simple event structures (p=.013). Conclusions and Implications: Cinderella narratives are a useful method for comparing CwSLI to TDC given comparable samples in terms of number of utterances. It is not appropriate for examining alternations as few possible alternations were produced across groups. Event processing in CwSLI...

Event Graph Execution

Fonte: Escola de Pós-Graduação Naval Publicador: Escola de Pós-Graduação Naval
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This interactive tutorial visually illustrates the event graph execution, and reviews the graphical syntax used to construct the discrete event model.

On event-based middleware for location-aware mobile applications

Meier, Rene; Cahill, Vinny
Fonte: IEEE Computer Society Publicador: IEEE Computer Society
Tipo: Article; all_ul_research; ul_published_reviewed; none
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peer-reviewed; As mobile applications become more widespread, programming paradigms and middleware architectures designed to support their development are becoming increasingly important. The event-based programming paradigm is a strong candidate for the development of mobile applications due to its inherent support for the loose coupling between components required by mobile applications. However, existing middleware that supports the event-based programming paradigm is not well suited to supporting location-aware mobile applications in which highly mobile components come together dynamically to collaborate at some location. This paper presents a number of techniques including location-independent announcement and subscription coupled with location dependent filtering and event delivery that can be used by event-based middleware to support such collaboration. We describe how these techniques have been implemented in STEAM, an event-based middleware with a fully decentralized architecture, which is particularly well suited to deployment in ad hoc network environments. The cost of such location-based event dissemination and the benefits of distributed event filtering are evaluated.

A highly adaptable generic event-based message channel design for loosely coupling software modules

Eryigit, Cihat
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Tipo: Tese de Doutorado Formato: xvi, 157 p. : ill. ;
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Approved for public release, distribution is unlimited; Component-based software engineering is an emerging software development approach based on the fundamentals of object-oriented technology. This approach moves programmers' focus from component development to component assembly. Event-based programming is one of the techniques that can be used to assemble software components into applications. In this thesis, a new, generic, highly adaptable and flexible event channel has been designed and implemented. The main product is a Java utility package, called "channel package", which should help Java application developers create or enhance large systems using an event-based programming approach. The new channel design has several demonstrated performance advantages over existing event channel implementations. The flexibility and adaptability of the channel package has also been validated by a successful upgrade of the channel mechanism of the SAAM prototype system.; Lieutenant Junior Grade, Turkish Navy

Oriented Adverbs : Issues in the Lexical Semantics of Event Adverbs; Orientierte Adverbien : Zur lexikalischen Semantik von Ereignisadverbien

Geuder, Wilhelm
Fonte: Universität Tübingen Publicador: Universität Tübingen
Tipo: Dissertation; info:eu-repo/semantics/doctoralThesis
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In event semantics, manner adverbs are analysed as 'predicates of events'. However, many such event predicates have variants that apply to individuals instead of events; e.g. : 'to answer the question stupidly' vs. 'a stupid person'. The thesis investigates the question of how these pervasive and systematic alternations can be explained, and in doing so aims at supplementing the neo-Davidsonian theory of adverbial modification with a lexical-semantic account of the modifiers. One and the same underlying adjective usually gives rise to a whole range of different adverbial uses. The exact range of variants is found to be conditioned by the lexical-semantic class of the adjective. Hence, a second topic dealt with in detail is the identification and semantic analysis of a number of 'borderline' adverb types which are different from manner adverbs but still raise the question of whether they might be event-related. After an introduction that motivates the general approach, chapter 2 discusses various theoretical issues concerning the lexical status of adverbs. Chapter 3 introduces the class of resultative adverbs and argues that they constitute a kind of event-related modifier that arises via lexical shift from a predicate of individuals. Chapter 4 discusses individual-level adjectives like 'stupid' and their adverbial uses...

Estimating the Impact of Events - Sampling Frame Issues in Identifying Event Related Expenditure

Burgan, Barry John; Mules, Trevor
Fonte: Australian Centre for Event Management, University of Technology, Sydney Publicador: Australian Centre for Event Management, University of Technology, Sydney
Tipo: Conference paper
Publicado em //2000 Português
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When undertaking an economic evaluation of a major event there are two key issues that need to be addressed to provide appropriate estimates of economic impact. Firstly, one must provide an estimate of how many people came to the event, including why they came, and where they came from. This area of questioning provides the basis for estimating how much tourism has increased as a consequence of the event. Secondly, information is needed on how much the attendees spend during their visit – leading to estimates of what they spend because of the event. The major methodological approach, particularly for ex-post studies, has been to collect information by survey. The next key issue is the process of factoring the information for the survey up to represent the population as a whole. This might seem a simple issue to resolve but it often proves harder than might be expected. Even where an organiser has an accurate measure of the attendances this does not represent the actual number of people who might attend – due to multiple or repeat attendances etc. It is made even more complicated when we recall that in the economic impact measure we are more interested in attendance by visitors attracted to the destination because of the event, than in overall attendance. This paper considers the implications of these issues within a random sampling approach to surveying. In the first instance we need an estimate of aggregate attendance. In some cases the event organisers have very accurate estimates (tickets issued...

Transient Spaces: unsettling boundaries and norms at the cultural event Noc Noc, Guimarães, Portugal

Sarmento, João; Ferreira, Marisa R.
Fonte: Instituto Politécnico do Porto Publicador: Instituto Politécnico do Porto
Tipo: Conferência ou Objeto de Conferência
Publicado em 15/12/2014 Português
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Cities are increasingly expected to be creative, inventive and to exhibit intense expressivity. In the past decades many cities have experienced growing pressure to produce and stage cultural events of different sorts and to develop new strategies that optimize competitive advantages, in order to promote themselves and to boost and sell their image. Often these actions have relied on heavy public investment and major private corporation sponsoring, but it is not always clear or measured how successful and reproductive these investments have been. In the context of strained public finances and profound economic crisis of European peripheral countries, events that emerge from local communities and have low budgets, which manage to create significant fluxes of visitors and visibility, assume an increased interest. In order to reflect and sketch possible answers, we look to an emerging body of literature concerning creative cities, and we focus on the organisation of a particular cultural event and its impact and assimilation into a medium size Portuguese city. This paper looks at the two editions (2011 and 2012) of one of such events – Noc Noc – organized by a local association in the city of Guimarães, Portugal. Inspired by similar events...

Especificación de patrones de diseño en event-B como procesos NTCC

Gómez Hernández, Carlos Eduardo
Fonte: Pontificia Universidad Javeriana; Facultad de Ingenieria; Carrera de Ingeniería de Sistemas y Computación Publicador: Pontificia Universidad Javeriana; Facultad de Ingenieria; Carrera de Ingeniería de Sistemas y Computación
Tipo: info:eu-repo/semantics/bachelorThesis; Trabajo de Grado; info:eu-repo/semantics/publishedVersion Formato: application/pdf; 65 p.
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Los métodos formales son importantes para modelar sistemas críticos, ya que con ellos se tiene una certeza del correcto funcionamiento de dichos sistemas. Por ejemplo, en el contexto de cirugías asistidas por computador, uno esperaría que cada acción del robot corresponda a la acción que el usuario (en este caso el doctor) esté realizando, después de todo, está en juego la vida de una persona. Dentro del diseño de software, Event-B usa modelos llamados patrones de diseño, y tal como se realiza en programación clásica, el reutilizar código es importante para hacer mejores programas y evitar pensar en problemas que previamente fueron resueltos. Event-B usa los patrones de diseño para reutilizar modelos que previamente han sido verificados, haciendo el proceso de modelamiento más eficiente. NTCC es un lenguaje concurrente que permite expresar de manera declarativa sincronización de procesos en diferentes unidades de tiempo. La idea general del proyecto es crear modelos de patrones de diseño en NTCC y proponer una forma de traducir dichos modelos a una estructura en Event-B. La manera para poderlo realizar es creando modelos generales de algunos patrones de diseño de dichos sistemas, modelarlos en ambos tipos de especifi- cación de sistemas...

Event Order Abstraction for Parametric Real-Time System Verification

Umeno, Shinya
Fonte: MIT - Massachusetts Institute of Technology Publicador: MIT - Massachusetts Institute of Technology
Formato: 19 p.
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We present a new abstraction technique, event order abstraction (EOA), for parametric safety verification of real-time systems in which ``correct orderings of events'' needed for system correctness are maintained by timing constraints on the systems' behavior. By using EOA, one can separate the task of verifying a real-time system into two parts: 1. Safety property verification of the system given that only correct event orderings occur; and 2. Derivation of timing parameter constraints for correct orderings of events in the system.The user first identifies a candidate set of bad event orders.Then, by using ordinary untimed model-checking, the user examines whether a discretized system model in which all timing constraints are abstracted away satisfies a desirable safety property under the assumption that the identified bad event orders occur in no system execution. The user uses counterexamples obtained from the model-checker to identify additional bad event orders, and repeats the process until the model-checking succeeds. In this step, the user obtains a sufficient set of bad event orders that must be excluded by timing synthesis for system correctness.Next, the algorithm presented in the paper automatically derives a set of timing parameter constraints under which the system does not exhibit the identified bad event orderings. From this step combined with the untimed model-checking step...

Automated event clustering and quality screening of consumer pictures for digital albuming

Loui, Alexander; Savakis, Andreas
Fonte: The Institute of Electrical and Electronics Engineers (IEEE) Publicador: The Institute of Electrical and Electronics Engineers (IEEE)
Tipo: Artigo de Revista Científica
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In this paper, algorithms for automatic albuming of consumer photographs are described. Specifically, two core algorithms namely event clustering and screening of low-quality images, are introduced and their performance is evaluated. Event clustering and image quality screening have many applications including albuming services, image management and organization, and digital photofinishing. These are difficult tasks because there is, in general, none (or very limited) contextual information about picture content, and the final interpretation could be subjective. A novel event-clustering algorithm is created to automatically segment pictures into events and subevents for albuming, based on date/time metadata information, as well as color content of the pictures. A block-based color histogram correlation technique is developed for image content comparison of general consumer pictures. A new quality-screening algorithm is developed based on object quality measures, to detect problematic images caused by underexposure, low contrast, and camera defocus or movement.; "Automated event clustering and quality screening of consumer pictures for digital albuming," IEEE Transactions on Multimedia. The Institute of Electrical and Electronics Engineers (IEEE). Held September 2003. ©2003 Institute of Electrical and Electronics Engineers (IEEE). Personal use of this material is permitted. However...

Event driven dynamic web pages

Yi, Kan
Fonte: Rochester Instituto de Tecnologia Publicador: Rochester Instituto de Tecnologia
Tipo: Masters Project Formato: 1196444 bytes; application/pdf
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Web technologies are among the most rapid developing areas. They continue to evolve from HTML, DHTML, JavaScript to CGI, ASP, JSP, Servlet. However the life of web developers is still not so easy as traditional GUI programmer. The web developers should very clear about communications between browsers and web servers, which puts a great burden on the web developers. In the project, an Event Driven Model is extended to web servers based on Servlet technology. With this Event Driven Model, the web developers are totally transparent to the communication details. The development of web pages becomes similar as GUI programming, describing the content of web pages and binding event handler functions to Html objects. The Event Driven Model is implemented by applying Document Object Model (DOM) and constructing HTML tree Objects on server side to server get and post requests from browsers. There are two approaches in this project. One is pure Java approach, which describes HTML contents and event handler functions in the same Java file. The other one separates the HTML contents in a XML file, while only event handler functions are defined in Java files. The whole project includes a forward servlet, coordinating between the web server and event driven web pages...

The Anthology magazine as it event.; A revista Antologia enquanto acontecimento.

Mittmann, Marluce; ufsc
Fonte: Universidade Federal de Santa Catarina Publicador: Universidade Federal de Santa Catarina
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; ; Formato: application/pdf
Publicado em 04/12/2009 Português
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The present work is to think the anthology magazine, which Cabral wanted to edit as Event. We reflect on the notion of event by Gilles Deleuze, Derrida and Heidegger. Then I return to Giorgio Agamben the discussion that he committed the program to a magazine along with Claudio Rugafiori he planned to edit. So, first introduce the notion of event in the sequence written as an event, then the program for a magazine and I conclude by presenting the magazine in the letters as an event. This pathway is necessary so that we could make us understand and explain the problem elected. Keywords: event, letter, magazine.; http://dx.doi.org/10.5007/2175-7917.2009v14n2p158O presente trabalho consiste em pensar a revista Antologia, a que Cabral pretendia editar, como Acontecimento. Refletimos sobre a noção de acontecimento apresentada por Gilles Deleuze, Derrida e Heidegger. Depois, retomo de Giorgio Agamben a discussão por ele empenhada do programa de uma revista que juntamente com Cláudio Rugafiori ele planejava editar. Assim, primeiramente apresento a noção de acontecimento, em seqüência a escrita como acontecimento, depois o programa para uma revista e finalizo apresentando a revista nas cartas como acontecimento. Essa via faz-se necessária para que conseguíssemos nos fazer compreender e explicar a problemática elegida. Palavras-chave: acontecimento...

On a Framework for Complex and ad hoc Event Management over Distributed Systems

Vargas-Solar,Genoveva; Bucciol,Paolo; Collet,Christine
Fonte: Instituto Politécnico Nacional, Centro de Innovación y Desarrollo Tecnológico en Cómputo Publicador: Instituto Politécnico Nacional, Centro de Innovación y Desarrollo Tecnológico en Cómputo
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2010 Português
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Internet-based communications have amazingly evolved in recent years. As a consequence, the number - and complexity - of distributed systems which provide access to services and applications has dramatically increased. As long as these services have been extended to support an increasing number of communication media (voice, audio, video, ...) and systems, ad hoc communication protocols and methodologies have been designed and developed. Given the autonomy of available services and applications, distributed systems generally rely on event-based communications for integrating these resources. However, a general model for the management of event-based communications, suitable for complex and ad hoc event processing as well as for the generic publish/subscribe messaging paradigm, is still missing. This paper presents a general and flexible event detection and processing framework which can be adapted based on specific requirements and situations. Within the framework, the main aspects of event management over distributed systems are treated, such as event definition, detection, production, notification and history management. Other aspects such as event composition, are also discussed. The goal of the paper is to provide a common paradigm for event-based communications...