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8th ACM Workshop on Information Hiding and Multimedia Security, IH and MMSec 2020

作者： Amerini, Irene Caldelli, Roberto Dept. of Computer Control and Management Engineering Sapienza University of Rome Rome Italy Parma Italy Mercatorum University Rome Italy

ISBN: (纸本)9781450370509

The ability of artificial intelligence techniques to build synthesized brand new videos or to alter the facial expression of already existing ones has been efficiently demonstrated in the literature. The identification of such new threat generally known as Deepfake, but consisting of different techniques, is fundamental in multimedia forensics. In fact this kind of manipulated information could undermine and easily distort the public opinion on a certain person or about a specific event. Thus, in this paper, a new technique able to distinguish synthetic generated portrait videos from natural ones is introduced by exploiting inconsistencies due to the prediction error in the re-encoding phase. In particular, features based on inter-frame prediction error have been investigated jointly with a Long Short-Term Memory (LSTM) model network able to learn the temporal correlation among consecutive frames. Preliminary results have demonstrated that such sequence-based approach, used to distinguish between original and manipulated videos, highlights promising performances. © 2020 ACM.

关键词： Long short-term memory

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A novel approach to extract significant time intervals of vehicles from superhighway Gantry Timestamp sequences

A novel approach to extract significant time intervals of ve...

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2017 IEEE International Conference on Applied System Innovation, ICASI 2017

作者： Wang, Jing-Doo Hwang, Ming-Chorng Dept. of Computer Science and Information Engineering Asia University Taiwan Dept. of Medical Research China Medical University Hospital China Traffic Control Research Center INC China Engineering Consultants Taiwan

ISBN: (纸本)9781509048977

It is attractive to extract and determine the key features of traffic patterns for mitigating road congestion and predicting travel time of vehicles in traffic analysis. Based on previous works that is a scalable approach via Hadoop MapReduce programming model, and can extract maximal repeats from a huge amount of tagged sequences, this paper adapts that approach to extract significant patterns of travel time intervals of freeway traffics in Taiwan, consisting of gantry list with time intervals of vehicles passing those gantries. Experimental resource are the records of gantry timestamp sequences of each vehicle passed in three months (2016/11-12 and 2017/1), downloaded from the Traffic Data Collection System (TDCS, http://***/history/TDCS/), one of Taiwan government open data platform. To focus on one gantry sequences for observation, in this study, the longest pattern on the trip within the Taiwan National Freeway No.5 is selected. Experimental results show that the statistics of vehicle travel time according to 24 hours/per day are provided, and can give clue to the drivers how to avoid rush hours. This work is expected to be capable to handle a huge amount of real data by extending the scale of time intervals from month to year, and to be promising for further traffic and transportation research in the future. © 2017 IEEE.

关键词： MapReduce

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Securing JPEG architecture based on enhanced chaotic hill cipher algorithm

Securing JPEG architecture based on enhanced chaotic hill ci...

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2011 International Conference on computer engineering and Systems, ICCES'2011

作者： Hamissa, Ghada Sarhan, Amany Abdelkader, Hatem Fahmy, Mahmoud Electrical Engineering Dept. Faculty of Engineering KFS University Kafr-Elsheikh Egypt Computer and Automatic Control Dept. Faculty of Engineering Tanta University Tanta Egypt Information System Dept. Faculty of Comp. and Info. Menoufia University Menoufia Egypt

ISBN: (纸本)9781457701283

In the last two decades, Chaos theory has received a great deal of attention from the cryptographic community. This paper presents two ideas. First idea is using chaotic functions to overcome the weaknesses of the classical Hill cipher. The second idea is proposing a new encoder-decoder architecture, called ChaoEncoDeco, for securing JPEG images. An extra stage of encryption is embedded within the traditional JPEG codec to improve security level of such system. This security stage uses one of the chaotic functions called Logistic Map. This map is used to enhance the Hill cipher and achieve more secure encryption key. The properties of both chaotic system and of the Hill cipher encryption key are all utilized to obtain ultimate secure systems. The proposed encryption algorithm is crypto-analyzed and compared to the standard Hill cipher algorithm. Complete evaluation for the proposed architecture is also performed which indicates the effectiveness of the proposed system. © 2011 IEEE.

关键词： Cryptography

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State feedback optimal control with singular solution for a class of nonlinear dynamics 15

State feedback optimal control with singular solution for a ...

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15th International Conference on Informatics in control, Automation and Robotics, ICINCO 2018

作者： Giamberardino, Paolo Di Iacoviello, Daniela Dept. Computer Control and Management Engineering Antonio Ruberti Sapienza University of Rome Italy Institute for Systems Analysis and Computer Science Antonio Ruberti Rome Italy

ISBN: (纸本)9789897583216

The paper studies the problem of determining the optimal control when singular arcs are present in the solution. In the general classical approach the expressions obtained depend on the state and the costate variables at the same time, so requiring a forward-backward integration for the computation of the control. In this paper, sufficient conditions on the dynamics structure are provided and discussed in order to have both the control and the switching function depending on the state only, so simplifying the computation avoiding the necessity of the backward integration. The approach has been validated on a classical SIR epidemic model. Copyright © 2018 by SCITEPRESS – Science and Technology Publications, Lda. All rights reserved

关键词： State feedback

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Differential Co-expression Network Analysis to Investigate Sexual Dimorphism in Colon Cancer

Differential Co-expression Network Analysis to Investigate S...

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2022 IEEE International Conference on Bioinformatics and Biomedicine, BIBM 2022

作者： Alfano, Caterina Farina, Lorenzo Petti, Manuela Sapienza University of Rome PhD Program in Network Oncology and Precision Medicine Rome Italy Sapienza University of Rome PhD Program in Network Oncology and Precision Medicine Dept. of Computer Control and Management Engineering Rome Italy Sapienza University of Rome Dept. of Computer Control and Management Engineering Rome Italy

ISBN: (纸本)9781665468190

Colorectal cancer is the third most diagnosed cancer in the world, but it has a higher mortality rate in men compared to women. However, we are not close to understanding how and why sex influences the outcome of the disease. This study focuses on mRNA expression profiles of colon cancer patients to look for molecular differences in the development of colon cancer between men and women. We used paired expression data (i.e., data collected in pairs of normal and cancer cells, by taking samples from the same individual), we identified differentially expressed genes (cancer vs normal) and computed co-expression and differential co-expression gene networks (men vs women). Doing so, we inferred the main changes and alterations happening in cancer tissues, and specifically how these changes were different among men and women. We found that the co-expression networks of women and men affected by colon cancer are quite different and we reported the genes that show the most differences in this comparison, checking if they could also be associated to sexual dimorphism or sexual hormones. Among these genes we found a interesting presence of genes associated to the Wnt signaling pathway which has been found to be regulated by estrogen and whose activation is strongly linked with colon cancer. © 2022 IEEE.

关键词： Diseases

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BUILDING AUTOMATA – TYPE SIMULATION MODELS FOR UNDERGRADUATE TEACHING INDUSTRIAL SYSTEMS ANALYSIS

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IFAC Proceedings Volumes 2006年第6期39卷 297-302页

作者： Vasileios Deligiannis Stamatis Manesis Patras Electrical & Computer Engineering Dept. Division of Systems and Control

Simulation has a significant role in control engineering. It provides the best solution for educating new engineers without expensive experimentation on real systems. This paper presents a guide for constructing simulation models based on a recently presented hyper-class of hybrid automata. New type's definition is given jointly with some examples of guide's use. Guide is applicable in various programming environments and is oriented for undergraduate teaching purposes.

关键词： automata modelling simulation education industrial production systems

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Virtual control Labs Experimentation: The Water Tank System

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IFAC-PapersOnLine 2016年第6期49卷 87-92页

作者： Galan, Daniel Heradio, Ruben Torre, Luis de la Dormido, Sebastian Esquembre, Francisco Dept. of Computer Science and Automatic Control Universidad Nacional de Educación a Distancia Juan del Rosal 16 MadridE-28040 Spain Dept. of Software Engineering and Computer Systems Universidad Nacional de Educación a Distancia Juan del Rosal 16 MadridE-28040 Spain Dept. of Mathematics Universidad de Murcia Campus de Espinardo MurciaE-30071 Spain

This paper describes a new way to perform automated experiments using virtual laboratories. Experiments are developed and executed using a new software tool: the Experiment Editor. This tool uses virtual laboratories applications designed with educational purposes. The main features/advantages of the Experiment Editor are: 1) the possibility of modifying the initial functionality of the laboratories (i.e. adding new controllers to the plant), 2) analyzing the obtained results during the experiment and performing complex or repetitive tasks in a simple way, 3) and any others explained in the paper. To illustrate the utility of the Experiment Editor a very well-known system is used: the water tank system. © 2016

关键词： Distance education computer aided software engineering computer software Experiments Laboratories Water tanks Easy java(script) Simulations Experimentation Language Repetitive task Simulations Tank system Tool use Virtual control Virtual laboratories

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Conducting Online Lab Experiments with Blockly

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IFAC-PapersOnLine 2017年第1期50卷 13474-13479页

作者： Galan, Daniel Heradio, Ruben de la Torre, Luis Dormido, Sebastian Esquembre, Francisco Dept. of Computer Science and Automatic Control Universidad Nacional de Educación a Distancia Juan del Rosal 16 MadridE-28040 Spain Dept. of Software Engineering and Computer Systems Universidad Nacional de Educación a Distancia Juan del Rosal 16 MadridE-28040 Spain Dept. of Mathematics Universidad de Murcia Campus de Espinardo MurciaE-30071 Spain

Laboratory experimentation plays an essential role in control education. To reduce the high costs of maintaining apparatus in traditional labs and to support distance and blended learning, online laboratories are used as a possible alternative to conventional hands-on labs. In these labs it is often desirable to allow students to define their own experiments. This paper presents the definition and implementation of a generic experimentation language for conducting automatic experiments on existing online laboratories. The main objective is to use an online lab, created independently, as a component in which users can perform experiments. To achieve it, authors present the Experiment Application. It is composed by Blockly, to define and design the experiments, and Google Chart, review and visualize the experiment results. This tool offers benefits to students, teachers and, even, lab designers. For the moment, it can be used with any existing lab or simulation created with the authoring tool Easy Java(script) Simulations. Since there are repositories with hundreds of free available labs created with this tool, the potential applicability of the described tool is considerable. To illustrate the utility of the Experiment Application a very well-known system is used: the Simple Harmonic Oscillator system. © 2017

关键词： computer software Experiments Research laboratories Teaching Blockly Easy java(script) Simulations Experimentation Language Javascript Remote laboratories Virtual laboratories

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Performing Automated Experiments with EJsS Laboratories

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IFAC-PapersOnLine 2015年第29期48卷 134-139页

作者： Galan, Daniel Heradio, Ruben Torre, Luis De La Dormido, Sebastian Esquembre, Francisco Dept. of Computer Science and Automatic Control Universidad Nacional de Educación A Distancia Juan Del Rosal 16 MadridE-28040 Spain Dept. of Software Engineering and Computer Systems Universidad Nacional de Educación A Distancia Juan del Rosal 16 MadridE-28040 Spain Dept. of Mathematics Universidad de Murcia Campus de Espinardo MurciaE-30071 Spain

Existing software allows the development of high quality interactive applications that permit their implementation in laboratories, both virtual and remote. To perform an experiment, the user needs to know how these applications are implemented. In addition, when coding an experiment, the user has to manage the language in which the simulation was created and needs to handle fluently a simulation language just to perform experiments. In the academic field these simulations are used to create virtual and remote laboratories. The authors propose a tool to develop automated experiments for these laboratories. It is intended that the experiments use a powerful and simple language to improve students interaction with the laboratories. That is, avoid repetitive tasks using simple algorithms, data collection and analysis of results, among other features. A new environment for the development of experiments in the authoring tool Easy Java(script) Simulations (EjsS) is proposed. It permits the decoupling of the application design phase from the experiment design. It has been equipped with a language capable of encircling all the expected commands, such as creating events, launching simultaneous applications or modifying their variables. Set with a high level layer, the language allows less experienced users to create their own experiments without having any knowledge of how the application was made. These features will be explained throughout the paper and some physic and control examples of use, as a controller for a cylindrical and a circular tank or a motion controller for a remote robot, will be given to demonstrate the potential of this new environment. © 2015, IFAC (International Federation of Automatic control) Hosting by Elsevier Ltd. All rights reserved.

关键词： Java programming language Application programs computer simulation languages Experiments Laboratories Technology transfer Easy Java(script) Simulations Experimentation Language Remote laboratories Simulations Virtual laboratories

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Adaptive H∞-control design for a class of LPV systems

Adaptive H∞-control design for a class of LPV systems

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44th IEEE Conference on Decision and control, and the European control Conference, CDC-ECC '05

作者： Karimi, H.R. Moshiri, B. Jabehdar Maralani, P. Lohmann, B. Dept. of Electrical and Computer Engineering Control and Intelligent Processing Center of Excellence University of Tehran Tehran Iran Institute of Automatic Control Technical University of Munich Munich Germany

ISBN: (纸本)0780395689

In this paper, we focus on the issue of adaptive H∞- control design for a class of linear parameter-varying (LPV) systems based on the Hamiltonian-Jacobi-Isaac (HJI) method. By combining the idea of polynomially parameter-dependent quadratic functions and vector projection method to derive an adaptive H∞-control, sufficient conditions with high precision are given to guarantee both robust asymptotic stability and disturbance attenuation of the LPV systems with unknown constant parameters. The applicability of the proposed design method is illustrated on a simple example. © 2005 IEEE.

关键词： Linear systems

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