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9th Scholar's Yearly Symposium of Technology, engineering and Mathematics, SYSTEM 2023

作者： Marinoni, Christian Ponzi, Valerio Comminiello, Danilo Dpt. of Information Engineering Electronics and Telecommunications Sapienza University of Rome Via Eudossiana 18 Roma00184 Italy Department of Computer Control and Management Engineering Sapienza University of Rome Via Ariosto 25 Roma00185 Italy Institute for Systems Analysis and Computer Science Italian National Research Council Via dei Taurini 19 Roma00185 Italy

During the COVID-19 pandemic, the use of a people tracking system could have been crucial, particularly in sensitive environments, such as hospitals. DPPL Hallway Tracker is a framework that uses security camera footage to determine which rooms in a corridor a person has entered. It generates a database containing all the people identified and allows quick identification of potential cases of infection based on the time spent in a room and its maximum capacity. DPPL Hallway Tracker is structured in two phases: detection and re-identification. In the first phase, it exploits Mask RCNN to identify people and room doors. In the second one, it uses the deep association metric model from DeepSORT to re-identify a person as he leaves a room. © 2023 Copyright for this paper by its authors.

关键词： COVID-19

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Developing Distributed Reasoning-Based Applications for the Semantic Web

Developing Distributed Reasoning-Based Applications for the ...

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International Conference on Advanced Information Networking and Applications Workshops (AINAW)

作者： Dimitrios Koutsomitropoulos Georgia Solomou Tzanetos Pomonis Panagiotis Aggelopoulos Theodore Papatheodorou High Performance Information Systems Laboratory Computer Engineering and Informatics Dpt. University of Patras Patras Greece

ISBN: (纸本)9781424467013;9780769540191

In order for Semantic Web applications to be successful a key component should be their ability to take advantage of rich content descriptions in meaningful ways. Reasoning consists a key part in this process and it consequently appears at the core of the Semantic Web architecture stack. From a practical point of view however, it is not always clear how applications may take advantage of the knowledge discovery capabilities that reasoning can offer to the Semantic Web. In this paper we present and survey current methods that can be used to integrate inference-based services with such applications. We argue that an important decision is to have reasoning tasks logically and physically distributed. To this end, we discuss relevant protocols and languages such as DIG and SPARQL and give an overview of our Knowledge Discovery Interface. Further, we describe the lessons-learned from remotely invoking reasoning services through the OWL API.

关键词： Semantic Web Application software OWL Protocols Service oriented architecture Ontologies Conferences Information systems Laboratories computer networks

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When free riding is the best choice: The case of network charges for content providers

When free riding is the best choice: The case of network cha...

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International Conference on Network and Service Management

作者： Maurizio Naldi Giuseppe D'Acquisto Università di Roma Tor Vergata Dpt. of Computer Science and Civil Engineering Roma Italy

Content providers are often accused of free riding by exploiting the network to distribute their content without sharing their revenues with the network providers. In order to assess the correctness of such an accusation, we set up a game-theoretical model, where content providers releasing their contents for free and under the payment of a usage-based charge are both present. In this model, the network provider charges both content providers a usage-based charge (network charge) as well. The network provider and the paid content provider act as the players, using the respective retail prices as strategic leverages. Both the cases where network charges are set by the network provider and by a regulatory authority are examined. The Nash equilibrium is determined in a closed form. In a typical scenario, the solution represented by zero network charges maximizes both the network provider's revenues and the social welfare: free riding for content providers appears as the best choice under both the viewpoints of the selfish network provider and the regulatory authority.

关键词： Games Advertising Equations Network neutrality Conferences Nash equilibrium

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Forecast Uncertainty in Procurement Decisions for Cloud Storage

Forecast Uncertainty in Procurement Decisions for Cloud Stor...

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International Conference on computer Modeling and Simulation, UKSIM

作者： Maurizio Naldi Dpt. of Computer Science and Civil Engineering Università di Roma Tor Vergata Roma Italy

In public vs. private solutions (i.e. Cloud vs. In-house, or leased vs. Owned) for storage, both alternatives have their pros and cons. Cloud storage can easily adapt to the company needs, but exhibits a higher unit cost than in-house solutions. On the other hand, if the company relies on its own storage equipment, it must periodically purchase it on the basis of forecasts, which may prove imprecise and lead to idle equipment. In this paper, we propose a comparative evaluation tool for the two procurement approaches, where the cloud can play the role of either exclusive storage medium or supplement to in-house equipment (in the case of underestimation of storage needs). The tool considers the impact of equipment acquisition intervals and forecast accuracy over a long time horizon, adopting a Geometric Brownian Motion model for the evolution of storage capacity needs, it can be employed as a decision support tool for procurement decisions.

关键词： Cloud computing Companies Procurement Market research Stochastic processes Mathematical model Computational modeling

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An adaptation algorithm for adaptive web based systems based on link structure and document similarity

An adaptation algorithm for adaptive web based systems based...

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作者： Raufi, Bujar Georgieva, Juliana Luma, Artan Ismaili, Florije Zenuni, Xhemal South East European University Dpt. of Computer Science Ilindenska nn 1200 Tetovo Macedonia Technical University of Sofia Fac. of Computers and Control Systems Kl. Ohridski 8 1000 Sofia Bulgaria

ISBN: (纸本)9789549260021

Many traditional adaptive web based systems today are complex in its design and implementation which makes them hard to implement in general purpose web sites. The lack of efficient approach and adaptation al- gorithm makes their usage in isolated cases like: e-commerce sites or only education systems. In this paper we introduce a new adaptation algorithm based on web sites link structure and document similarities both represented through matrices. Initial results show good performance of the algorithm for both per-user based adaptation and adaptation for groups of users.

关键词： Websites

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SSME curricula:an overview

SSME curricula:an overview

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2010 International Conference on Services science, Management and engineering (SSME 2010)

作者： Gianmario Motta Thiago Barroero Giovanni Pignatelli DIS (Dpt of Computer Engineering and Systems Science) University of Pavia

Services science(SSME) is a *** the 2006 manifesto published by Communications of ACM several universities are launching SSME *** order to give a well founded overview of SSME and related curricula,we first address SSME scope *** on we summarize the main contents of the curriculum and particularly the learning approach in the core *** case studies,we describe the SSME curriculum of University of Peking and University of *** we consider *** service engineers are designers of IT-enabled services who know how to analyze and design business service chains and to identify,customize and integrate appropriate IT *** from traditional IT engineers,service engineers use a critical value based approach with a faster and comprehensive analysis

关键词： Service sciences,SSME,Services engineering,engineering Education,Information Analysis,Business Process Analysis,Business Process Design,Business Process Modeling

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WSRNet: Joint spotting and recognition of handwritten words

arXiv

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arXiv 2020年

作者： Retsinas, George Sfikas, Giorgos Maragos, Petros School of Electrical and Computer Engineering National Technical University of Athens Greece Dpt. of Computer Science and Engineering University of Ioannina Greece

In this work, we present a unified model that can handle both Keyword Spotting and Word Recognition with the same network architecture. The proposed network is comprised of a non-recurrent CTC branch and a Seq2Seq branch that is further augmented with an Autoencoding module. The related joint loss leads to a boost in recognition performance, while the Seq2Seq branch is used to create efficient word representations. We show how to further process these representations with binarization and a retraining scheme to provide compact and highly efficient descriptors, suitable for keyword spotting. Numerical results validate the usefulness of the proposed architecture, as our method outperforms the previous state-of-the-art in keyword spotting, and provides results in the ballpark of the leading methods for word recognition. Copyright © 2020, The Authors. All rights reserved.

关键词： Vocabulary control

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EFFICIENTLY MAPPING LARGE COMBINATIONAL CIRCUITS ON K-LUT BASED FPGAS

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IFAC Proceedings Volumes 2007年第18期40卷 667-672页

作者： Ion I. Bucur Costin-Anton Boiangiu University Politehnica of Bucharest Romania Computer Science and Engineering Dpt. bucurb@cs.pub.ro costin@cs.pub.ro.

Large combinational circuits need to be partitioned in order to manage scarce resources on k-LUT based FPGAs . Circuit partitioning has multiple applications in VLSI design. One of the most common is that of dividing combinational circuits (usually large ones) that will not fit on a single package among a number of packages. Partitioning is of practical importance for k- LUT based FPGA circuit implementation. In this work is presented a multilevel multi-resource partitioning algorithm for partitioning large combinational circuits using cone-clusters in order to efficiently map existing and commercially available k -LUT based FPGAs packages.

关键词： two-way partitioning multi-way partitioning recursive partitioning flat partitioning cone-clusters critical path cutting cones bottom-up clusters

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PROBABILISTIC MATRIX COMPLETION FOR IMAGE PHASE RETRIEVAL

PROBABILISTIC MATRIX COMPLETION FOR IMAGE PHASE RETRIEVAL

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IEEE International Conference on Image Processing

作者： Petros Nyfantis Pablo Ruiz Aggelos K. Katsaggelos Department of Physics National and Kapodistrian University of Athens Dpt. of Electrical Engineering and Computer Science Northwestern University

In this paper we address the Phase Retrieval problem, which aims to recover the phase of the Fourier transform of a signal when only magnitude measurements are available. Following recent developments in Phase Retrieval, the problem can be transformed into a convex semidefinite programming optimization problem, which can be solved using Matrix Completion techniques. In this paper the acquisition process is modeled using a likelihood function, which splits the original problem into two convex optimization problems, and alternates between the solution of each of them. To relate both convex problems we introduce a heuristic, which results in fast convergence of the proposed method.

关键词： Extraterrestrial measurements Optimization Convergence Minimization Heuristic algorithms Discrete Fourier transforms

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The interconnection of third generation mobile systems (UMTS) with fixed and wireless access networks over V/sub B5.2/ interface

The interconnection of third generation mobile systems (UMTS...

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IEEE/AFCEA EUROCOMM Information systems for Enhanced Public Safety and Security

作者： I.A. Pikrammenos Telecommunications Laboratory Dpt. Of Electrical Engineering and Computer Science National and Technical University of Athens Athens Greece

This paper proposes the V/sub B5.2/ interface as a basis for the definition of the generic Iu interface. The architecture of the emerging network that incorporates a third generation mobile system (UMTS) service node (SN), and any kind of access network (AN) technology, fixed or wireless, over the proposed V/sub B5.2/ oriented generic interface, is presented. The mapping of the call/connection control (CC) related messages, needed for the manipulation of connections, with the involvement of the broadband bearer connection control protocol (B-BCCP), is formed in a generic approach. The paper concludes pointing out possible enhancements to the existing V/sub B5.2/ interface, and mainly to the B-BCCP, in order to play effectively the role as a candidate of the Iu generic interface.

关键词： 3G mobile communication Wireless networks Tin Space technology Laboratories computer science computer architecture Access protocols Hardware Routing

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