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2022 IEEE SmartWorld, 19th IEEE International Conference on Ubiquitous Intelligence and Computing, 2022 IEEE International Conference on Autonomous and Trusted Vehicles Conference, 22nd IEEE International Conference on Scalable Computing and Communications, 2022 IEEE International Conference on Digital Twin, 8th IEEE International Conference on Privacy Computing and 2022 IEEE International Conference on Metaverse, SmartWorld/UIC/ATC/ScalCom/DigitalTwin/PriComp/Metaverse 2022

作者： Fernandes, Filipe Werner, Cláudia Universidade Federal Do Rio de Janeiro - COPPE/UFRJ System Engineering and Computer Science Department Rio de Janeiro Brazil

ISBN: (纸本)9798350346558

The Metaverse is very challenging to implement solutions for eXtended Reality applications (XR apps), due to the combination of complex concerns that should be addressed: multiple users with non-traditional input and output devices, different hardware platforms that should be addressed, forceful interactive rates, and experimental interaction techniques, among other issues. Therefore, this work aims to present a Software Product Line (SPL)-based approach to support the development of Web XR apps. More specifically, we define a features model that represents similarities and variables (domain analysis);we defined a core composed of generic and reusable software artifacts (domain design);and we developed an interface to support the instantiation of a Web XR app family, named MetaSee Features Model Editor (domain implementation). This approach integrates with a component of the MetaSEE architecture (Metaverse for Software engineering Education). A preliminary assessment found that Features Model has conceptual consistency from the point of view of the complexity of Web XR Apps multimodal interaction. As future work, features model and artifacts will be increased with improvements and an evaluation with a significant number of participants will be performed. © 2022 IEEE.

关键词： Application programs

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On nonrepetitive colorings of paths and cycles

arXiv

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arXiv 2023年

作者： Botler, Fábio Lomenha, Wanderson de Souza, João Pedro Program System Engineering and Computer Science COPPE Brazil Universidade Federal do Rio de Janeiro Brazil Colégio Pedro II Brazil

We say that a sequence a1 · · · a2t of integers is repetitive if ai = ai+t for every i ∈ {1, ..., t}. A walk in a graph G is a sequence v1 · · · vr of vertices of G in which vivi+1 ∈ E(...

We say that a sequence a1 · · · a2t of integers is repetitive if ai = ai+t for every i ∈ {1, ..., t}. A walk in a graph G is a sequence v1 · · · vr of vertices of G in which vivi+1 ∈ E(G) for every i ∈ {1, ..., r − 1}. Given a k-coloring c: V (G) → {1, ..., k} of V (G), we say that c is walk-nonrepetitive (resp. stroll-nonrepetitive) if for every t ∈ N and every walk v1 · · · v2t the sequence c(v1) · · · c(v2t) is not repetitive unless vi = vi+t for every i ∈ {1, ..., t} (resp. unless vi = vi+t for some i ∈ {1, ..., t}). The walk (resp. stroll) chromatic number σ(G) (resp. ρ(G)) of G is the minimum k for which G has a walk-nonrepetitive (resp. stroll-nonrepetitive) k-coloring. Let Cn and Pn denote, respectively, the cycle and the path with n vertices. In this paper we present three results that answer questions posed by Barát and Wood in 2008: (i) σ(Cn) = 4 whenever n ≥ 4 and n ∈/{5, 7};(ii) ρ(Pn) = 3 if 3 ≤ n ≤ 21 and ρ(Pn) = 4 otherwise;and (iii) ρ(Cn) = 4, whenever n ∈/{3, 4, 6, 8}, and ρ(Cn) = 3 otherwise. In particular, (ii) improves bounds on n obtained by Tao in *** Codes 05C15, 05C38 Copyright © 2023, The Authors. All rights reserved.

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Software Product Line for Metaverse: Preliminary Results

Software Product Line for Metaverse: Preliminary Results

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Symposia and Workshops on Ubiquitous, Autonomic and Trusted Computing, UIC-ATC

作者： Filipe Fernandes Cláudia Werner System Engineering and Computer Science Department Universidade Federal do Rio de Janeiro – COPPE/UFRJ Rio de Janeiro Brazil

The Metaverse is very challenging to implement solutions for eXtended Reality applications (XR apps), due to the combination of complex concerns that should be addressed: multiple users with non-traditional input and output devices, different hardware platforms that should be addressed, forceful interactive rates, and experimental interaction techniques, among other issues. Therefore, this work aims to present a Software Product Line (SPL)-based approach to support the development of Web XR apps. More specifically, we define a features model that represents similarities and variables (domain analysis); we defined a core composed of generic and reusable software artifacts (domain design); and we developed an interface to support the instantiation of a Web XR app family, named MetaSee Features Model Editor (domain implementation). This approach integrates with a component of the MetaSEE architecture (Metaverse for Software engineering Education). A preliminary assessment found that Features Model has conceptual consistency from the point of view of the complexity of Web XR Apps multimodal interaction. As future work, features model and artifacts will be increased with improvements and an evaluation with a significant number of participants will be performed.

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Software Product Line for Metaverse: Preliminary Results

arXiv

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arXiv 2022年

作者： Fernandes, Filipe Werner, Cláudia System Engineering and Computer Science Department Universidade Federal do Rio de Janeiro COPPE UFRJ Rio de Janeiro Brazil

The Metaverse is a network of eXtended Reality applications (XR apps) connected to each other, over the Internet infrastructure, allowing network users, systems, and devices to access them. It is very challenging to implement solutions for XR apps, due to the combination of complex concerns that should be addressed: multiple users with non-traditional input and output devices, different hardware platforms that should be addressed, forceful interactive rates, and experimental interaction techniques, among other issues. Therefore, this work aims to present a Software Product Line (SPL)-based approach to support the development of Web XR apps. More specifically, we define a features model that represents similarities and variables (domain analysis);we defined a core composed of generic and reusable software artifacts (domain project);and we developed an interface to support the instantiation of a Web XR app family, named MetaSee Features Model Editor (domain implementation). This approach integrates with a component of the MetaSEE architecture (Metaverse for Software engineering Education). A preliminary assessment found that Features Model has conceptual consistency from the point of view of the complexity of Web XR Apps multimodal interaction. As future work, features model and artifacts will be increased with improvements and an evaluation with a significant number of participants will be made. © 2022, CC BY-NC-ND.

关键词： Application programs

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Alternatives for testing of context-aware contemporary software systems in industrial settings: Results from a rapid review

arXiv

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arXiv 2021年

作者： Matalonga, Santiago Amalfitano, Domenico Doreste, Andrea Fasolino, Anna Rita Travassos, Guilherme H. School of Computing Engineering and Physical Science ALMADA Research Centre University of the West of Scotland Paisley Renfrewshire United Kingdom Department of Electrical Engineering and Information Technology DIETI University of Naples Federico II Naples Italy System Engineering and Computer Science COPPE Federal University of Rio de Janeiro Rio de Janeiro Brazil

Context: Context-aware contemporary software systems (CACSS) are mainstream. Furthermore, they present challenges for current engineering practices. These challenges are distinctively present when testing CACSS, as the variation of context deepens the limitations of available software testing practices and technologies. Objective: To understand how the industry deals with the variation of context when testing CACSS. Method: A Rapid Review was commissioned to uncover the necessary evidence to achieve the objectives. Results: Our results show that current research initiatives aim to generate or improve Test Suites that can deal with the variation of context and the sheer volume of test input possibilities. To achieve this, they mostly rely on modeling the systems' dynamic behavior and increasing computing resources to generate test inputs. We found no evidence of research results aiming at managing context variation through the testing lifecycle process. Conclusions: We discuss how the identified solutions are not ready for mainstream adoption. They are all domain-specific, and while the ideas and approaches can be reproduced in different settings, the technologies noon to be re-engineered and tailor to the specific CACSS. © 2021, CC BY-NC-SA.

关键词： Software testing

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The importance of socio-technical resources for software ecosystems management

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Journal of Innovation in Digital Ecosystems 2016年第2期3卷 98-113页

作者： Thaiana Lima Rodrigo Pereira dos Santos Jonice Oliveira Cláudia Werner System Engineering and Computer Science Department PESC/COPPE/UFRJ–Federal University of Rio de Janeiro Zip Code 21945-970–Rio de Janeiro Brazil

Software Ecosystem (SECO) is often understood as a set of actors interacting among themselves and manipulating artifacts with the support of a common technology platform. Usually, SECO approaches can be designed as an environment whose component repository is gathering stakeholders as well as software products and components. By manipulating software artifacts, a technical network emerges from interactions made over the component repository in order to reuse artifacts, improving code quality, downloading, selling, buying etc. Although technical repositories are essential to store SECO’s artifacts, the interaction among actors in an emerging social network is a key factor to strengthen the SECO’s through increasing actor’s participation, e.g., developing new software, reporting bugs, and communicating with suppliers. In the SECO context, both the internal and external actors keep the platform’s components updated and documented, and even support requirements and suggestions for new releases and bug fixes. However, those repositories often lack resources to support actors’ relationships and consequently to improve the reuse processes by stimulating actors’ interactions, information exchange and better understanding on how artifacts are manipulated by actors. In this paper, we focused on investigating SECO as component repositories that include socio-technical resources. As such, we present a survey that allowed us to identify the relevance of each resource for a SECO based on component repositories, initially focused on the Brazilian scenario. This paper also describes the analysis of the data collected in that survey. Information of other SECO elements extracted from the data is also presented, e.g., the participants’ profile and how they behave within a SECO. As an evolution of our research, a study for evaluating the availability and the use of such resources on top of two platforms was also conducted with experts in collaborative development in order to analyze th

关键词： Software ecosystems Socio-technical resources Component repositories Software reuse

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Supporting negotiation and socialization for component markets in software ecosystems context

Supporting negotiation and socialization for component marke...

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Conferencia Latinoamericana En Informatica (CLEI)

作者： Rodrigo Santos Cláudia Werner Lucas Tostes Thaiana Lima Gabriel Barbosa System Engineering and Computer Science Department COPPE/UFRJ-Federal University of Rio de Janeiro Rio de Janeiro Brazil

ISBN: (纸本)9781509016341

Organizations open up their software platforms and reusable assets to others, including partners and third-party developers around the world, creating software ecosystems (SECOs). It can contribute to minimize nontechnical barriers of software reuse in industry because it explores potential benefits from the relations among companies and stakeholders. An inhibitor is the complexity in defining value for reusable assets in a scenario where producers try to meet customers' expectations, and vice-versa. This paper presents a value-based mechanism to support component negotiation and socialization processes in a reuse repository in the SECO context as an extension of the Brechó-EcoSys environment. Social resources were integrated into the mechanism in order to aid component negotiation. An evaluation of the negotiation mechanism was performed, based on an analysis of its elements and functions against critical factors in the negotiation within a SECO, identified in a previous systematic literature review. In addition, an analysis of the social resources supporting the negotiation mechanism was performed against popular sociotechnical elements for SECOs, identified in a previous survey with experts in the field.

关键词： Stakeholders Ecosystems Context Documentation Software reusability Software engineering

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A survey on socio-technical resources for Software Ecosystems 15

A survey on socio-technical resources for Software Ecosystem...

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7th ACM International Conference on Management of Computational and Collective IntElligence in Digital Ecosystems, MEDES 2015

作者： Lima, Thaiana Dos Santos, Rodrigo Pereira Werner, Cláudia System Engineering and Computer Science PESC/COPPE Federal University of Rio de Janeiro Rio de Janeiro21945-970 Brazil

ISBN: (纸本)9781450334808

Software Ecosystem (SECO) is often understood as a set of actors interacting among themselves and manipulating artifacts with the support of a common technology platform. SECO can represent an environment in which the component repository is gathering stakeholders, and software products and components. By manipulating software artifacts, a technical network emerges from component repositories that support Software Reuse. Those repositories often lack resources to support actors' relationships. Introducing social resources in SECO aims at stimulating actors' interactions, information exchange and better understanding on how artifacts are manipulated in such social relations. In this paper, we focus on investigating SECO representing component repositories that include socio-technical resources. A survey with experts was planned and executed. The goal was to identify the relevance of each resource for a SECO based on component repositories, initially focused on the Brazilian scenario. This paper also describes the analysis of the data collected in this survey. Some information of other SECO elements extracted from the data is also presented, e.g., the participants' profile and how they behave within a SECO. © 2015 ACM.

关键词： computer software reusability

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Real-Time Music Tracking Based on a Weightless Neural Network

Real-Time Music Tracking Based on a Weightless Neural Networ...

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International Conference on Complex, Intelligent and Software Intensive systems, CISIS

作者： Diego F. P. De Souza Felipe M.G. Franca Priscila M.V. Lima Syst. Eng. & Comput. Sci. Program - COPPE Universidade Federal do Rio de Janeiro Rio de Janeiro RJ BR System Engineering and Computer Science Program - COPPE Universidade Federal do Rio de Janeiro Rio de Janeiro Brazil Inst. Tercio Pacitti (NCE) Univ. Fed. do Rio de Janeiro Janeiro Brazil

Music tracking is a useful technique for many music related tasks. Some applications include evaluating musicians performance, automatic score page turning and syncing music lyrics. In this work, we describe a WiSARD-based system for real-time music tracking and evaluate the performance of the corresponding implementation. Given any audio example, the system is capable of recognizing which point of the original signal is currently playing and of dynamically tracking it. In other words, if the music restarts or jumps to another position, the system is capable of following it. This is accomplished thanks to the low complexity training and classifying of the models used, which continually keep track of all possible points of the music, and not only of the current neighboring region. Experiments are provided in order to analyze the performance of the system in three test scenarios: tracking continuous playing, tracking multiple jumps and self predicting errors. The final results demonstrate that the system is efficient even when applied to musics with some level of repetitions and short periods of silence.

关键词： Training Random access memory Music Robot sensing systems Hidden Markov models Neurons

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Using Social Networks to Support Software Ecosystems Comprehension and Evolution

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Social Networking 2014年第2期3卷 108-118页

作者： Rodrigo Pereira dos Santos Maria Gilda P. Esteves Gleisson de S. Freitas Jano Moreira de Souza System Engineering and Computer Science COPPE University of Rio de Janeiro Rio de Janeiro Brazil

The software industry has evolved to a multiple-product development created on a platform and based on a common architecture integrated to other systems. This integration happens through components and third-party developers networks in Software Ecosystems (SECOs). Since systems and software development processes present challenges beyond the technical side, SECOs have emerged as an approach to improve the Software engineering (SE) mindset in the industry. This fact changes the software industry as it requires the management of an integrated social-based environment to support a transition from an intra-organizational to an open business model approach towards a SECO approach. In this context, social networks can be important to coordinate a collaborative and distributed environment to develop SECOs platforms. This paper analyses the impact of social networks in SECOs through an integrated framework of the SECO and social network challenges. So, a proposal for a sociotechnical-based architecture to support the SECOs lifecycle is discussed.

关键词： Software Ecosystems Social Networks Software Life Cycle Innovation

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