This paper presents a systematic review of the perception systems and simulators for autonomous vehicles (AV). This work has been divided into three parts. In the first part, perception systems are categorized as environment perception systems and positioning estimation systems. The paper presents the physical fundamentals, principle functioning, and electromagnetic spectrum used to operate the most common sensors used in perception systems (ultrasonic, RADAR, LiDAR, cameras, IMU, GNSS, RTK, etc.). Furthermore, their strengths and weaknesses are shown, and the quantification of their features using spider charts will allow proper selection of different sensors depending on 11 features. In the second part, the main elements to be taken into account in the simulation of a perception system of an AV are presented. For this purpose, the paper describes simulators for model-based development, the main game engines that can be used for simulation, simulators from the robotics field, and lastly simulators used specifically for AV. Finally, the current state of regulations that are being applied in different countries around the world on issues concerning the implementation of autonomous vehicles is presented.

The digital economy is an economic sector that includes goods and services, whose development, manufacturing, merchandising or supply depend on critical digital technologies. The digital economy can be conceptualized into four different subsectors; on the one hand, it consists of infrastructure and applications and, on the other, electronic commerce and new intermediaries. This natural structure can be directly traced to how business generates revenues. The aim of this paper is to explain what is understood today by digital economy and to identify its dimensions and impact on the firm. For this purpose, it is necessary to develop its theoretical basis. In the second part of this paper, we refer to the results of an empirical research in the Spanish context.

<p>Estudio  sobre  la conceptualización  decimonónica   de  la  pobreza    y  la  criminalidad   en México.  Analiza    las  propuestas   de  la  elite política  para   resolver   ese  problema  que  atacaba  el proyecto  social  progresista  típico  de la ideología  liberal.   Expone   el desarrollo  de la criminalística  mexicana principalmente durante   el porfiriato</p>

There are numerous studies in the management literature that analyze specifc aspects of the implementation of information technology (IT) in organizations. Meanwhile, the global IT management area has emerged as a dynamic field of investigation of IT impact in a global environment. However, after reviewing the management /international business literature and the global IT literature, we detect the need to integrate the theoretical frameworks of both streams in order to advance in this field. As a result, we connect the areas of advance in IT general management with the main lines of research in global IT management. The synthesis of both fields allows us to suggest new areas of research that we discuss in the final section.

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