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Displaying 1-13 out of 13 total
Implementação e Análise de Uso de uma Aplicação para Edição Cooperativa em Dispositivos Móveis
Found in: Sistemas Colaborativos, Simpósio Brasilerio de
By Carla Diacui Medeiros Berkenbrock, Celso Massaki Hirata
Issue Date:October 2008
pp. 99-110
Supporting mobile cooperative work with synchronous applications that require consistency of data is a challenge due to the constraints imposed by both mobile devices and wireless network. The development of techniques for designing flexible cooperative sy...
 
Exploring a Brain Controlled Interface for Emotional Awareness
Found in: 2012 Brazilian Symposium on Collaborative Systems (SBSC)
By Mauro C. Pichiliani,Celso Massaki Hirata,Tania Fraga
Issue Date:October 2012
pp. 49-52
Emotions play an important role in human interaction, communication, coordination, and cooperation. The perception of emotional and affective state in present and past group's activities is a relevant issue since emotional awareness influence the outcome o...
 
Usability Requirements for the Development and Evaluation of Mobile Groupware Systems
Found in: Sistemas Colaborativos, Simpósio Brasilerio de
By Carla Diacui Medeiros Berkenbrock, Celso Massaki Hirata, Clovis Torres Fernandes, Mauro Carlos Pichiliani
Issue Date:October 2009
pp. 10-18
Usability is an important factor affecting the user's productivity. However, evaluating groupware usability is a complex task, especially in a mobile environment. In this paper a study with eight requirements to explore usability in a mobile groupware envi...
 
Designing and evaluating interfaces for mobile groupware systems
Found in: International Conference on Computer Supported Cooperative Work in Design
By Carla Diacui Medeiros Berkenbrock, Alexandre Parra Carneiro da Silva, Celso Massaki Hirata
Issue Date:April 2009
pp. 368-373
Mobile cooperative systems can facilitate cooperation by improving the flexibility of usage. However, mobile devices present some constraints that become the design and implementation of groupware systems harder. Additionally, there is a lack of general in...
 
RUP Extension For the Software Performance
Found in: Computer Software and Applications Conference, Annual International
By Carlos Eduardo de Barros Paes, Celso Massaki Hirata
Issue Date:August 2008
pp. 732-738
Software quality can be described by maintainability, usability, security and performance properties. Performance is generally considered a critical requirement in systems such as distributed systems based on the Web and real time embedded systems. However...
 
Supporting Cache Coherence in Mobile Cooperative Systems
Found in: Network Computing and Applications, IEEE International Symposium on
By Carla Diacui Medeiros Berkenbrock, Celso Massaki Hirata
Issue Date:July 2008
pp. 240-243
Efficient cache coherence strategies are critical to maintain data consistency and provide a reasonable performance of wireless applications with mobile devices. However, the majority of the current strategies for cache coherence in mobile environments hav...
 
A Semantics for UML-RT using n-calculus
Found in: Rapid System Prototyping, IEEE International Workshop on
By Juliana de Melo Bezerra, Celso Massaki Hirata
Issue Date:May 2007
pp. 75-82
UML-RT is a UML real-time profile that allows modeling event-driven and distributed systems. UML-RT is not a formal specification language, therefore it is not possible to do formal verification of UML-RT models. This article proposes formal semantics for ...
 
Utilização do Rastreamento Ocular para Visualização do Local de Atenção em Sistemas de Edição Colaborativos
Found in: Sistemas Colaborativos, Simpósio Brasilerio de
By Mauro Carlos Pichiliani, Celso Massaki Hirata, Fabricio da Silva Soares, Carlos Henrique Quartucci Forster
Issue Date:October 2008
pp. 169-179
Awareness is the knowledge about the present and past group’s activities and it is a relevant question for cooperative work. There are many devices that supplies awareness information in synchronous collaborative editing systems. However, the current aware...
 
Extending timestamp-based two phase commit protocol for RESTful services to meet business rules
Found in: Proceedings of the 2011 ACM Symposium on Applied Computing (SAC '11)
By Celso Massaki Hirata, Luiz Alexandre Hiane da Silva Maciel
Issue Date:March 2011
pp. 778-785
Service Oriented Architecture allows development of software with requirements of interoperability and weak coupling. Nowadays, REST is an architectural style that has been gaining attention in the SOA domain. REST allows the development of web services ba...
     
Computing data cubes using exact sub-graph matching: the sequential MCG approach
Found in: Proceedings of the 2009 ACM symposium on Applied Computing (SAC '09)
By Celso Massaki Hirata, Joubert de Castro Lima
Issue Date:March 2009
pp. 1-5
In this paper, we present a novel full cube computation and representation approach, named MCG. In a data cube, each cuboid can be viewed as a set of sub-graphs. In general, redundant sub-graphs are quite common in a data cube, but their elimination is a h...
     
An optimistic technique for transactions control using REST architectural style
Found in: Proceedings of the 2009 ACM symposium on Applied Computing (SAC '09)
By Celso Massaki Hirata, Luiz Alexandre Hiane da Silva Maciel
Issue Date:March 2009
pp. 1-5
SOA is a service oriented architecture that allows development of software with interoperability and weak coupling. Nowadays WS-* is the most used SOAP-based specification set for constructing web services. REST is an architectural style that permits the d...
     
Integrating functional metrics, COCOMO II and earned value analysis for software projects using PMBoK
Found in: Proceedings of the 2008 ACM symposium on Applied computing (SAC '08)
By Carlos Augusto Lombardi Garcia, Celso Massaki Hirata
Issue Date:March 2008
pp. 28-34
Nowadays, Function Point and Use Case Point metrics have been largely adopted in the software industry to measure the size of the development work of the project. Metrics should be used in conjunction with estimating techniques such as COCOMO. There has be...
     
Extending RUP to develop fault tolerant software
Found in: Proceedings of the 2008 ACM symposium on Applied computing (SAC '08)
By Carlos Eduardo de B. Paes, Celso Massaki Hirata, Edgar Toshiro Yano
Issue Date:March 2008
pp. 28-34
Software reliability is generally considered a critical requirement in distributed systems such as Web-based systems and real-time embedded systems. Reliability can be obtained using fault tolerance techniques during the software development process. Howev...
     
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