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Logic-based cognitive planning for conversational agents

Abstract

This paper presents a novel approach to cognitive planning based on an NP-complete logic of explicit and implicit belief whose satisfiability checking problem is reduced to SAT. We illustrate the potential for application of our model by formalizing and then implementing a human-machine interaction scenario in which an artificial agent interacts with a human agent through dialogue and tries to motivate her to practice a sport. To make persuasion effective, the artificial agent needs a model of the human's beliefs and desires which is built during interaction through a sequence of belief revision operations. We consider two cognitive planning algorithms and compare their performances, a brute force algorithm based on SAT and a QBF-based algorithm.

article Article

date_range 2024

language English

link Link of the paper

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Davila Jorge

Longin Dominique

Lorini Emiliano

Maris Frederic

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Featured Keywords

Cognitive planning

Epistemic logic

Conversational agents

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Assessment of reinforced concrete building damages following the Kahramanmaraş earthquakes in Malatya, Turkey (February 6, 2023)

Abstract

Earthquakes of magnitude Mw = 7.7 and Mw = 7.6 hit the city of Kahramanmaraş (Turkey) on 6 February 2023. These earthquakes caused serious damage in 11 provinces in Turkey resulting in over 50,000 deaths and huge economic losses with the collapse of thousands of buildings. Two consecutive devastating earthquakes have severely damaged the reinforced concrete building stock located in Malatya. There are many reasons reinforced concrete structures suffer damage under the influence of seismic loads. These reasons can be listed as material and section properties that do not comply with earthquake codes, workmanship defects, ground parameters that are not considered and design errors, as seen in field investigations after earthquakes in Turkey in the past. In this research, a field study was conducted on reinforced concrete buildings damaged after the earthquakes in Malatya province. The causes of structural damages in reinforced concrete buildings between 6–26 years of age were assessed in terms of design and material defects. The structural damages were mainly caused due to insufficient stirrups in structural members, short column, strong beam–weak column, failures of infill walls, soft story type collapse, poor concrete quality, and reinforcement corrosion. In addition to the field investigation, the spectrum relationships created using raw acceleration data obtained from DEMP (Disaster and Emergency Management Presidency) stations in Malatya province were compared with the design response spectra.

article Article

date_range 2024

language English

link Link of the paper

Collapsed buildings

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