In this survey paper, we characterize the reinforcement learning for mobile robot navigation and state the importance of artificial intelligence in achieving machine learning techniques. We review various reinforcement learning approaches that have been proposed for mobile robot navigation classifying them under the learning paradigms. Reinforcement learning (RL) is presented as an autonomous learning procedure that is suitable for unknown environments. We describe some challenging learning policies of RL approach that arise in path planning of mobile robot navigation, in particular in Markovian environments, and present their possible solution methods. Finally, we present future scope and show suitable machine learning approaches for learning in mobile robot path planning.

A partir de la formulación del concepto de sustentabilidad, surge la necesidad de considerar en forma integral y global los procesos productivos y de alcanzar medidas de la sustentabilidad. De este modo se construyeron listas de indicadores y características que debían tener los mismos. Luego se propusieron conceptos, criterios y metodologías para seleccionar/desprender/derivar indicadores que conformaran índices de sustentabilidad o que fueran parte de diferentes marcos de evaluación de sustentabilidad. \nEn Latinoamérica se han desarrollado sistemas para evaluar agroecosistemas con desigual grado de conceptualización y rigurosidad, y también con disímiles criterios. Dado que dichos sistemas han sido escasamente analizados tanto en su fase conceptual como en su fase aplicada, en el presente artículo nos proponemos comparar el “Marco para la Evaluación de Sistemas de Manejo de recursos naturales incorporando Indicadores de Sustentabilidad” (MESMIS) y el marco “Evaluación de Agroecosistemas Mediante Indicadores de Sustentabilidad”, buscando semejanzas y diferencias entre los mismos, en clave de resaltar sus ventajas y sus limitantes. Como conclusión general afirmamos que ninguno de los dos marcos presenta en términos globales características superadoras, no obstante el enfoque sistémico presente en el marco MESMIS le otorga mayor poder heurístico.

Light, heat, oxygen, moisture, ozone, atmospheric pollution, and biological effects are the most important effectives that wreak chemical degradation on polymer structure. Chemical degradation on polymer consist of problems such as discoloration, brittleness, surface cracks, perspiration, crumbling, smell, and surface acidity. The aim of this work is to improve the resistance of polystyrene (PS) material to chemical degradation. For this purpose, PS is coated with silica sol-gel hybrid coating. Silica sol-gel was synthesized by using vinyltrimethoxysilane (VTMS) as a cross-linker and tetraethylorthosilicate (TEOS) as a silica source.Firstly, four different pre-treatment techniques (oven, vacuum oven, lyophilizer, and freezing) were studied to determine the most suitable pre-treatment technique for the coating on the PS substrate of sol-gel prepared with the initial formulation (S1).A freezing techniquegave the best results for a coating sample. The change of surface colour of the coated PS was measured byCIE L*a*b* methods. Secondly, the most suitable curing agent (Irgacure 184, Irgacure 819, Darocur 1173, and TiO2 as the crystalline anatase phase) was chosen to coat the sol-gel on the PS.It was determined that the lowest yellowing of the PS surface was a hybrid coating with UV curing of TEOS sol modified by VTMS and TiO2 as photo-initiators. Finally, the chemical and morphological structure of the coated PS samples was determined by FT-IR and SEM instruments, respectively.

This paper is a bridging among soft set theory, set theory and AG-groups, in which soft intersection AG-group (abbreviated by soft int-AG-group) is defined and investigated. The concept of soft int-AG-group is further extended to define the notions of conjugates soft int-AG-group, normal soft int-AG-group, e-set and $\\alpha$-inclusion of soft int-AG-groups. Various properties of these notions are investigated and supported by relevant examples that are produced by GAP.

In general, the concept of polynomials of degree less then or equal to r with coefficients from Zn (group of integers modulo n), is associative and commutative under the binary operations of usual addition. While, in this paper we define binary operations on polynomials of degree <=r with coecients from Zn, which are nonassociative and non-commutative, and thus form various AG-groupoids and AG-groups of dierent properties.\nThe constructions of these structures are provided and various properties of these structures are investigated.

This study has been conducted with the purpose of construct questionnaire of sports participation of faculty and staff at universities and confirming its validity and reliability. In this study 379 individuals from faculty members and staff of the University of Malayer city among 4000 people by using random cluster sampling method as statistical sample. In this study after examine content validity in order to examine the construct validity exploration factor analysis and for examine reliability Cronbach alpha and for data analyzing SPSS software version 32 were used. According to factor analysis the sport participation questionnaire of members of academic staff were distributed in 8 items which consisting of Psychological (5 items), family (5items), social (5 items), cultural (5 items), administrative (5 items), facilities (5 items) and economical (4 items). The reliability of questionnaire was calculated as 0/904 by using Cronbach\