Papers by Osvaldo Agamennoni
The cornerstone of human evolution has always been and will continue to be, learning. It is cruci... more The cornerstone of human evolution has always been and will continue to be, learning. It is crucial to consider and fine-tune the dynamics of the various processes involved to achieve optimal performance in learning activities. Internal and external factors inherently drive learning and adopting a systemic approach allows us to understand better the challenges that may arise. This understanding enables the implementation of strategies that facilitate learning. This paper presents a systemic perspective on the key brain dynamics involved in learning processes. It draws on the cognitive cycle of interaction with the environment to describe different aspects of cognitive control. Additionally, it highlights how brain self-organization consolidates the knowledge and skills acquired during learning into memory. Often, educational policies focus on pedagogical techniques without a deep understanding of how learning processes develop within the brain. This paper seeks to provide a comprehensive, systemic view of these processes, offering insights into the primary challenges and strategies for effectively addressing them. It particularly explores the key factors influencing the dynamics of cognitive control in learning, focusing on attitudinal behaviours and outcome perception. It also offers strategic recommendations to effectively address these challenges.
Process Industries Power the Pacific Rim: Sixth Conference of the Asia Pacific Confederation of Chemical Engineering; Twenty-first Australasian Chemical Engineering Conference; Official Proceedings of Combined Conference 1993, 1993
In this paper we present the development of a multilayered perceptron neural network model to inf... more In this paper we present the development of a multilayered perceptron neural network model to infer the Melt Flow Index (MFI) of a polymer from other available measures on the plant. A number of studies were previously performed to get a good training data set. Finally, we present the structure of network used and the solution achieved.
The optimal feedback control of nonlinear process is attacked in this paper. The solution of this... more The optimal feedback control of nonlinear process is attacked in this paper. The solution of this problem is numerically computed using a Continuous Piecewise Linear (CPWL) approximation of the Ordinary Differential Equations (ODEs) system which describes the dynamics of the plant to control. In order to obtain this solution, the optimal regulation problem of an affine system is obtained. A numerical simulation example of a nonlinear chemical reactor is presented to shown the quality of the obtained response.Fil: Figueroa, Jose Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Investigaciones en Ingeniería Eléctrica "Alfredo Desages". Universidad Nacional del Sur. Departamento de Ingeniería Eléctrica y de Computadoras. Instituto de Investigaciones en Ingeniería Eléctrica "Alfredo Desages"; ArgentinaFil: García, Andrés Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Investigaciones en Ingeniería Eléctrica "Alfredo Desages". Universidad Nacional del Sur. Departamento de Ingeniería Eléctrica y de Computadoras. Instituto de Investigaciones en Ingeniería Eléctrica "Alfredo Desages"; ArgentinaFil: Agamennoni, Osvaldo Enrique. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Investigaciones en Ingeniería Eléctrica "Alfredo Desages". Universidad Nacional del Sur. Departamento de Ingeniería Eléctrica y de Computadoras. Instituto de Investigaciones en Ingeniería Eléctrica "Alfredo Desages"; Argentin
Process Industries Power the Pacific Rim: Sixth Conference of the Asia Pacific Confederation of Chemical Engineering; Twenty-first Australasian Chemical Engineering Conference; Official Proceedings of Combined Conference 1993, 1993
This paper presents a synergistic strategy to develop and simulate multivariable control for proc... more This paper presents a synergistic strategy to develop and simulate multivariable control for process systems. The synergy of the approach is in the construction of a strategy in which the various simulation tools used complement each other. The multivariable control algorithm used allows easy implementation within commercial distributed control systems (DCS). The strategy is used to rapidly develop a multivariable control system for a benzene, toluene, xylene distillation column. Simulation results show that the behaviour of the multivariable control system is superior to a conventional multiloop control scheme.
The HKU Scholars Hub (University of Hong Kong), May 31, 2016
In vivo real-time intraocular pressure measurement: Non-invasive tonometer vs. intra-vitreous pre... more In vivo real-time intraocular pressure measurement: Non-invasive tonometer vs. intra-vitreous pressure sensor
Journal of Visualization, May 9, 2022
Eye movements play an important role in actual neuroscience and in the last twenty years, many ey... more Eye movements play an important role in actual neuroscience and in the last twenty years, many eye-tracking devices have emerged with different methods and performance features. Generally, the highest quality ones with best performance in terms of accuracy and high framerates, are the most expensive apparatus and very often complicated to assembly. Also, they tend to work in fixed setups and it is hard to perform outdoor experiments, like driving a real car or walking long distances. The comfortable and cheaper ones are usually those having the poorest measuring characteristics, reaching maximum framerates below 250fps, yet with great advantages. These modern remote eye-tracking systems allow, in general, small head movements and the subject has not wear any kind of hardware. This feature is especially important when working with children or people with some kind of physical impairment. They are independent, small and one-piece hardware ready to plug into a mobile computer or laptop,...
Revista Telegrafica Electronica, 1981
Chemical Engineering Science, 1988
In this work, a methodology for a controller design ofmultivariable linear time invariant systems... more In this work, a methodology for a controller design ofmultivariable linear time invariant systems is presented. The singular values of the return difference operator and the time constant for each control loop can be easily specified through a set of rational functions in the Laplace domain. The frequency response of an ideal controller is directly obtained, allowing the implementation of different controller structures (PI, PID etc.). First, the discussion is focused on some new results ofthe perturbation theory which constitute the basis of the proposed methodology. Later, a complete analysis of the resulting control scheme is presented. Its robustness with respect to stability, performance and interactions as well as the normality of the closedloop system is demonstrated. Some implementation aspects for the formulation of the ideal controller matrix are discussed. Approximation of this ideal controller to different realizable structures is then discussed. Finally, a case study of the dual-composition control of two typical distillation columns currently found in the literature is presented.
XXIII Workshop de Investigadores en Ciencias de la Computación (WICC 2021, Chilecito, La Rioja), 2021
XXI Workshop de Investigadores en Ciencias de la Computación (WICC 2019, Universidad Nacional de San Juan)., Apr 1, 2019
Latin American Applied Research, 1995
Brazilian Journal of Chemical Engineering, 2016
In this paper, the robustness of a typical control scheme for Wiener systems is studied. These sy... more In this paper, the robustness of a typical control scheme for Wiener systems is studied. These systems consist of the cascade connection of a linear time invariant system and a static nonlinearity. To control this kind of systems, several approaches were discussed in the literature. Most of these control schemes involve transformation of the measured variable as well as the setpoint, by the inverse of the nonlinear gain. The approach followed in this work uses the inverse model of the static nonlinear gain, while the uncertainty in the Wiener model is treated as a partitioned problem. The linear block is considered as a parameter-affine-dependent model and, on the other hand, the nonlinear block uncertainty is analyzed as a conic-sector. The robustness analysis is performed using -theory. The results are evaluated on the basis of a simulation of a pH neutralization process.
Journal of integrative neuroscience, 2016
In the present work we analyzed the pupil size behavior of 40 subjects while they read well-defin... more In the present work we analyzed the pupil size behavior of 40 subjects while they read well-defined sentences with different contextual predictability (i.e., regular sentences and proverbs). In general, pupil size increased when reading regular sentences, but when readers realized that they were reading proverbs their pupils strongly increase until finishing proverbs' reading. Our results suggest that an increased pupil size is not limited to cognitive load (i.e., relative difficulty in processing) because when participants accurately recognized words during reading proverbs, theirs pupil size increased too. Our results show that pupil size dynamics may be a reliable measure to investigate the cognitive processes involved in sentence processing and memory functioning.
Proceedings of the 2nd International Conference on Applications of Intelligent Systems
Attention deficit hyperactivity disorder (ADHD) is a neurodevelopmental disability characterized ... more Attention deficit hyperactivity disorder (ADHD) is a neurodevelopmental disability characterized by difficulties in keeping concentration, excessive activity and difficulties controlling behaviour not appropriate to the person's age. It is estimated to affect between 4--9% of youths and 2--5% of adults. Assistive technologies can help people with ADHD to reach goals, stay organized and even fight the urge to succumb to forms of distraction. This work introduces a tool designed for people with ADHD aimed at detecting and training their ability to follow a target in a screen. The tool is based on non-invasive monocular gaze estimation technique without constraints in terms of user dependent calibration or appearance. The system has been employed and validated in a human-computer interaction (HCI) scenario with the aim of evaluating the user visual exploration. Results show that the tool can be used in complex tasks like monitoring a user progress comparing performance after different sessions.
Current Alzheimer Research
Introduction: Eye movement patterns during reading are well defined and documented. Each eye move... more Introduction: Eye movement patterns during reading are well defined and documented. Each eye movement ends up in a fixation point, which allows the brain to process the incoming information and program the following saccade. In this work, we investigated whether eye movement alterations during a reading task might be already present in middle-aged, cognitively normal offspring of late-onset Alzheimer’s disease (O-LOAD). Methods: 18 O-LOAD and 18 age-matched healthy individuals with no family history of LOAD participated in the study. Participants were seated in front of a 20-inch LCD monitor, and single sentences were presented on it. Eye movements were recorded with an eye tracker with a sampling rate of 1000 Hz. Results: Analysis of eye movements during reading revealed that O-LOAD displayed more fixations, shorter saccades, and shorter fixation durations than controls. Conclusion: The present study shows that O-LOAD experienced alterations in their eye movements during reading. O...
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Papers by Osvaldo Agamennoni