In its literal meaning, the term ἔκστασις (ekstasis) indicates a displacement, ‘being out of immobility’, and ultimately being outside oneself. To some extent, this term takes on a mystical connotation in late Antiquity, notably in book VI.9.11.24 of Plotinus’ Enneads, where ekstasis is described as a non-ordinary way of seeing. The notion of ecstasy, often inseparable from the concept of vision, would keep its mystical role, though altered in some ways, over the centuries, conceptualizing a specific kind of knowledge, which (...) goes beyond the subject-object opposition, addressing the epistemological issues of perceiving and knowing the divine, and often challenging the nature of the self. This issue offers some attempts to track the constant reshaping and migration of the notions of ecstasy and intellectual or spiritual vision over the history of Western thought, unearthing their structural and constant persistence, from the Middle Ages to the contemporary ages, recurrently in many different non-ultimately-dialectical metaphysical systems. The papers in this volume provide some illustrative examples of the tangled history of the divergent meanings that the notions of ecstasy and vision have taken on, and their considerable reassessments and adaptations to constantly evolving conceptual frameworks, often redefining further notions such as those of rapture, prophecy, sleep, dream, and death. -/- . (shrink)

This paper focuses on two short dubitationes on animal’s technical abilities, which Pietro Pomponazzi discussed in 1514 and in 1519 while teaching at the University of Bologna and commenting on Aristotle’s Physica, II, t. 80. A comparative analysis between the respective positions, expressed at a distance of five years, allows to retrace the change in Pomponazzi’s thoughts from the period immediately preceding the composition of De immortalitate animae to the writing of the De incantationibus and De fato.

Il tema dell'articolo è il massiccio incremento di elettori del Partito Liberale Austriaco FPÖ, comunemente classificato come partito populista di destra. La prospettiva scelta per analizzare tale successo elettorale consiste nell'esaminare la comunicazione pubblica della FPÖ. La tesi presentata è che la strategia discorsiva della FPÖ comprende da un lato la contrapposizione insanabile di un indistinto "noi" ad un altrettanto indistinto "loro" e dall’altro il livellamento del "loro" fino a costruire delle reti di colpevole complicità tra tutti i soggetti che (...) non siano il "noi" rappresentato nella volontà del capo. (shrink)

In this paper, the design of a low cost portable ventilator with performance analysis have been done to solve the scarcity of respiratory ventilators for COVID-19 patients. The materials used to build the system are: DC motor, rotating disc and pneumatic piston. The system input is the patient heart beat and the output is volume of air to the patient lung with adjusted breathing rate. This ventilator adjusts the breathing rate to the patient depending on his heart beat rate. The (...) performance analysis of this system have been done using Proportional Integral Derivative (PID) and Full State Feedback H2 controllers. Comparison of the system with the proposed controllers have been done using a step change and a random change of the patient heart beat and a promising result have been analyzed successfully. (shrink)

In this paper, the design and control of a hydraulic system based tire changer machine have been analyzed and simulated using Matlab/Simulink Toolbox successfully. The machine have a displacement input which is a leg pedal displacement in order to push the piston of the pump to fed the motor with a pressured hydraulic fluid to rotate the tire with an angular speed to mount and dismount it. Augmentation based H and 2 H optimal synthesis controllers have been used to improve (...) the performance of the machine. Comparison of the proposed controllers for tracking a reference input speed have been done using two reference inputs (step and random) signals. Finally the comparative simulation results proved the effectiveness of the proposed tire changer with H synthesis controller in improving the settling time and percentage overshoot. (shrink)

Recently, active suspension system will become important to the vehicle industries because of its advantages in improving road managing and ride comfort. This paper offers the development of mathematical modelling and design of a neural network control approach. The paper will begin with a mathematical model designing primarily based at the parameters of the active suspension system. A nonlinear three by four-way valve-piston hydraulic actuator became advanced which will make the suspension system under the active condition. Then, the model can (...) be analyzed thru MATLAB/Simulink software program. Finally, the NARMA-L2, model reference and predictive controllers are designed for the active suspension system. The results are acquired after designing the simulation of the quarter-car nonlinear active suspension system. From the simulation end result using MATLAB/Simulink, the response of the system might be as compared between the nonlinear active suspension system with NARMA-L2, model reference and predictive controllers. Besides that, the evaluation has been made between the proposed controllers thru the characteristics of the manage objectives suspension deflection, body acceleration and body travel of the active suspension system. . As a conclusion, designing a nonlinear active suspension system with a nonlinear hydraulic actuator for quarter car model has improved the car performance by using a NARMA-L2 controller. The improvements in performance will improve road handling and ride comfort performance of the active suspension system. (shrink)

In this study, the design and control of a hydraulic system based tire changer machine have been analyzed and simulated using MATLAB/Simulink Toolbox successfully. The machine have a displacement input which is a leg pedal displacement in order to push the piston of the pump to fed the motor with a pressured hydraulic fluid to rotate the tire with an angular speed to mount and dismount it. Augmentation based H4 and H2 optimal synthesis controllers have been used to improve the (...) performance of the machine. Comparison of the proposed controllers for tracking a reference input speed have been done using two reference inputs (step and random) signals. Finally, the comparative simulation results proved the effectiveness of the proposed tire changer with synthesis controller in improving the settling time and percentage overshoot. (shrink)

In this paper, the design of a low cost portable ventilator with performance analysis have been done to solve the scarcity of respiratory ventilators for COVID-19 patients. The materials used to build the system are: DC motor, rotating disc and pneumatic piston. The system input is the patient heart beat and the output is volume of air to the patient lung with adjusted breathing rate. This ventilator adjusts the breathing rate to the patient depending on his heart beat rate. The (...) performance analysis of this system have been done using Proportional Integral Derivative (PID) and Full State Feedback H2 controllers. Comparison of the system with the proposed controllers have been done using a step change and a random change of the patient heart beat and a promising result have been analyzed successfully. (shrink)