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arXiv 2025年

作者： Partohaghighi, Mohammad Marcia, Roummel Chen, YangQuan Electrical Engineering and Computer Science graduate program University of California Merced United States Department of Applied Mathematics University of California Merced MercedCA United States Lab Department of Mechanical Engineering School of Engineering University of California MercedCA95343 United States

Fractional-order stochastic gradient descent (FOSGD) leverages a fractional exponent to capture long-memory effects in optimization, yet its practical impact is often constrained by the difficulty of tuning and stabilizing this exponent. In this work, we introduce 2SED Fractional-Order Stochastic Gradient Descent (2SEDFOSGD), a novel method that synergistically combines the Two-Scale Effective Dimension (2SED) algorithm with FOSGD to automatically calibrate the fractional exponent in a data-driven manner. By continuously gauging model sensitivity and effective dimensionality, 2SED dynamically adjusts the exponent to curb erratic oscillations and enhance convergence rates. Theoretically, we demonstrate how this dimension-aware adaptation retains the benefits of fractional memory while averting the sluggish or unstable behaviors frequently observed in naive fractional SGD. Empirical evaluations across multiple benchmarks confirm that our 2SED-driven fractional exponent approach not only converges faster but also achieves more robust final performance, suggesting broad applicability for fractional-order methodologies in large-scale machine learning and related domains. © 2025, CC BY.

关键词： Convex optimization

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Protecting host-based intrusion detectors through virtual machines

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computer NETWORKS 2007年第5期51卷 1275-1283页

作者： Laureano, M. Maziero, C. Jamhour, E. [a]Graduate Program in Applied Computer Science Pontifical Catholic University of Paran¨￠ Brazil

Intrusion detection systems continuously watch the activity on a network or computer, looking for attack and intrusion evidences. However, host-based intrusion detectors are particularly vulnerable, as they can be disabled or tampered by successful intruders. This work proposes and implements an architecture model aimed to protect host-based intrusion detectors, through the application of the virtual machine concept. Virtual machine environments are becoming an interesting alternative for several computing systems due to their advantages in terms of cost and portability. The architecture proposed here makes use of the execution spaces separation provided by a virtual machine monitor, in order to separate the intrusion detection system from the system under monitoring. As a consequence, the intrusion detector becomes invisible and inaccessible to intruders. The prototype implementation and the tests performed show the viability of this solution. (c) 2006 Elsevier B.V. All rights reserved.

关键词： security intrusion detection virtual machines

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Applying verbal decision analysis to task allocation in distributed development of software 28

Applying verbal decision analysis to task allocation in dist...

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28th International Conference on Software Engineering and Knowledge Engineering, SEKE 2016

作者： Filho, Marum Simão Pinheiro, Plácido R. Albuquerque, Adriano B. Graduate Program in Applied Computer Science University of Fortaleza 7 de Setembro College Fortaleza Brazil Graduate Program in Applied Computer Science University of Fortaleza Fortaleza Brazil

ISBN: (纸本)189170639X

The management of distributed software development projects presents many challenges. One of them happens right at the start of the project and consists of the allocation of tasks between remote teams. When allocating a task to a site, the project manager takes into account several factors such as technical knowledge of staff and proximity to the client. The project manager usually takes this decision in a subjective way. The verbal decision analysis is an approach based on solving problems through multi-criteria qualitative analysis, which means it considers the analysis of subjective criteria. This paper describes the application of verbal decision analysis methodologies ORCLASS and ZAPROS III-i to classify and rank the most relevant factors that the project managers should take into account when allocating tasks in projects of distributed development of software.

关键词： Application programs

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Implementing a peer-to-peer web browser for publishing and searching web pages on Internet

Implementing a peer-to-peer web browser for publishing and s...

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21st International Conference on Advanced Networking and Applications

作者： Ribeiro, Heverson Borba Lung, Lau Cheuk Santin, Altair Olivo Brisola, Neander Larsen Graduate Program in Applied Computer Science (PPGIa) Pontifical Catholic University of Paraná(PUCPR) Brazil

ISBN: (纸本)9780769528465

This paper presents an implementation of a P2P Web Browser, called We2Peer(1), for publishing web pages on internet through peer-to-peer networks. The present proposal overcomes the problems involving entities dependency and content availability, by the user side, changing the conventional way used to publish web pages on Internet The proposed solution allows anyone who has a computer connected to the Internet, even through domestic ADSL connection, to publish web pages on their own machines. By using a peer-to-peer web browser another mechanism for searching web pages is offered based on DHT (Distributed Hash Tables). The user interface, provided by Web2Peer, carries all functions needed for creating, editing, publishing, searching, downloading and replicating the web pages on the peer-to-peer network.

关键词： Web browsers

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A multi-criteria model for planning and fine-tuning distributed Scrum projects

A multi-criteria model for planning and fine-tuning distribu...

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6th IEEE International Conference on Global Software Engineering, ICGSE 2011

作者： Almeida, Luis Henrique Albuquerque, Adriano Bessa Pinheiro, Plácido Rogério Graduate Program in Applied Computer Science University of Fortaleza Fortaleza 60811-905 Brazil

ISBN: (纸本)9780769545035

Distributed software development is a fact of life for many projects. It is well established that distance makes difficult to interact and to cooperate effectively. Scrum emphasizes communication, reduces coordination and control overhead;therefore it has enormous potential to help the management of distributed projects and has been increasingly used. Successfully managing the combined use of DSD and Scrum is a complex task and it requires carefully planning. Despite the importance and complexity of this type of problem, there seems to be a lack of reports, in the literature, of models that could support project managers dealing with these decision contexts. This paper presents a multi-criteria decision model for planning and finetuning such project plans. This model was developed using cognitive mapping and MACBETH (Measuring Attractiveness by a Categorical Based Evaluation Technique). The application of the model is demonstrated, followed by conclusion and remarks about future work. © 2011 IEEE.

关键词： Software design

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Customer-oriented diagnosis of memory provisioning for IaaS clouds

Customer-oriented diagnosis of memory provisioning for IaaS ...

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Brazilian Symposium on computer System Engineering, SBESC 2013

作者： Pfitscher, Ricardo J. Pillon, Mauricio A. Obelheiro, Rafael R. Santa Catarina State University Graduate Program in Applied Computing Department of Computer Science Brazil

Infrastructure-as-a-service clouds enable customers to use computing resources in a flexible manner to satisfy their needs, and pay only for the allocated resources. One challenge for IaaS customers is the correct provisioning of their resources. Many users end up underprovisioning, hurting application performance, or overprovisioning, paying for resources that are not really necessary. Memory is an essential resource for any computing system, and is frequently a performance-limiting factor in cloud environments. In this work, we propose a model that enables cloud customers to determine whether the memory allocated to their virtual machines is correctly provisioned, underprovisioned, or overprovisioned. The model uses two metrics collected inside a VM, resident and committed memory, and defines thresholds for these metrics that characterize each provisioning level. Experimental results with Linux guests on Xen, running four benchmarks with different workloads and varying memory capacity, show that the model was able to accurately diagnose memory provisioning in 98% of the scenarios evaluated. Copyright 2013 by the Authors.

关键词： Customer satisfaction

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Optimal resource allocation for survivable virtual infrastructures

Optimal resource allocation for survivable virtual infrastru...

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10th International Conference on Design of Reliable Communication Networks, DRCN 2014

作者： De S. Cavalcanti, Gustavo A. Obelheiro, Rafael R. Koslovski, Guilherme Graduate Program in Applied Computing Department of Computer Science Santa Catarina State University Brazil

ISBN: (纸本)9781479940097

Virtual infrastructures (VIs) consolidated the dynamic provisioning of computing and communication resources. A VI is a set of virtual machines interconnected by virtual links and switches/routers. Infrastructure providers (InPs) manage the physical substrates in which virtual resources requested by VIs (such as CPU, disk, memory, bandwidth) are reserved and allocated. Resource allocation is a complex problem that needs to satisfy different goals: users expect to run their applications on survivable VIs, while InPs aim to maximize profits, minimize costs and reduce substrate fragmentation. However, there is a dichotomy between minimizing substrate fragmentation, by co-locating VIs, and maximizing VI survivability, by sparsely allocating resources in order to decrease the impact of substrate failures. In this context, this paper discusses VI survivability and its impact on substrate fragmentation. We propose a mixed integer linear programming model to allocate resources considering the joint coordination of fragmentation and survivability. Experimental results suggest that it is possible to enhance VI survivability without significantly impacting substrate fragmentation. © 2014 IEEE.

关键词： Substrates

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Improving bilateral negotiation with evolutionary learning

Improving bilateral negotiation with evolutionary learning

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2008 12th International Conference on computer Supported Cooperative Work in Design, CSCWD

作者： Romanhuki, Emerson Fuckner, Marcio Enembreck, Fabrício Ávila, Bráulio Scalabrin, Edson E. PUCPR Pontifical Catholic University of Parana Graduate Program on Applied Computer Science Curitiba PR Brazil

ISBN: (纸本)9781424416509

This paper proposes an approach to generate offers and counter-offers in a bilateral negotiation process between cognitive agents with the learning machine capacities. The approach is configured, as each participant of a negotiation process improve their satisfaction degree, gaining knowledge from prior experience, i.e., in the next negotiation session, each participant can individually use this knowledge to redefine the configuration parameters of strategies and tactics to generate offers and counter-offers. Each agent refines their strategies using a genetic algorithm application based on the historical offers and counter-offer exchanges dataset. This context can lead to a new dimension in CSCW System Development. This approach was tested in a simulated bilateral negotiation environment, which involved, for example, a buyer agent and a seller agent. The discussions about the results confront different negotiation sessions comparing agents provided with strategy and tactics reconfiguration capabilities and agents using static strategies and tactics. © 2008 IEEE.

关键词： Genetic algorithms

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A method to automatically identify road centerlines from georeferenced smartphone data

A method to automatically identify road centerlines from geo...

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14th Brazilian Symposium on GeoInformatics, GEOINFO 2013

作者： Costa, George Henrique Rangel Baldo, Fabiano Graduate Program in Applied Computing Computer Science Department UDESC Santa Catarina State University Joinville Brazil

Digital road maps have gained fundamental role in population's daily life, so they need to be accurate and up-to-date. A viable solution is to generate maps by processing GPS data. However, one of the most challenging tasks regarding this approach is how to extract road centerlines from the cloud of georeferenced GPS points. The literature presents various methods that do it, but none have been found that is prepared for the continuous update of the map and refinement of its roads' accuracy. In this context, the objective of this work is to propose a method to identify road centerlines using an evolutive algorithm in order to generate and update road maps. This work uses as source of data GPS traces collected by smartphones. Although suitable to obtain a large amount of georeferenced data, these devices bring the additional problem of identifying the transport vehicle used along each trace. Preliminary results indicate that the method's performance is satisfactory, with an average variation of 2.95 meters in relation to satellite images.

关键词： Smartphones

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Possibilities to use the practice of telemedicine in actual technological conditions to remote areas

Possibilities to use the practice of telemedicine in actual ...

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25th Annual International Conference of the IEEE-Engineering-in-Medicine-and-Biology-Society

作者： Kmeteuk, O de Amorim, MF Graduate Program in Applied Computer Science Exact Sciences and Technology Center Pontifical Catholic University of Paraná Brazil

ISBN: (纸本)0780377893

One of the main factors that impede the practice of the telemedicine is not the lack of new technologies for the communication, but the lack of studies on the use of the technology already installed in the distant areas, in way to be used of a rational way. The objective of the telemedicine is to provide help to the cares with the health with quality the distant areas of the great attendance centers. Therefore, it cannot ignore the fact that these areas do not make use of point technologies for communication. Then, it is justified the need to accomplish studies that facilitate the practice of the independent telemedicine of the installed technology. Then, the objective of this work is to use as pilot an unit of remote health, contributing with a support system that allows the practice of the telemedicine using the technology of available transmission in the respective place, avoiding that the factor cost is a barrier for the telemedicine projects and can begin an improvement process in the quality of the attendance in units of distant health of the great centers of medical attendance.

关键词： telemedicine support system

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