The article aims to discuss the state of research on the history of two compound verbal tenses of the subjunctive mood: antepresente and antefuturo in Latin American Spanish. According to our analysis presented in the text, both forms have so far been superficially investigated from a diachronic perspective, which is caused, to some extent, by their rare usage and by their replacement with other verbal forms. However, in our opinion, a series of historical studies of these tenses should be carried out so that we could understand better the processes which take place in the subjunctive mood in contemporary varieties of Latin American Spanish.

This paper presents a comprehensive metrological analysis of the Microsoft Kinect motion sensor performed using a proprietary flat marker. The designed marker was used to estimate its position in the external coordinate system associated with the sensor. The study includes calibration of the RGB and IR cameras, parameter identification and image registration. The metrological analysis is based on the data corrected for sensor optical distortions. From the metrological point of view, localization errors are related to the distance of an object from the sensor. Therefore, the rotation angles were determined and an accuracy assessment of the depth maps was performed. The analysis was carried out for the distances from the marker in the range of 0.8−1.65 m. The maximum average error was equal to 23 mm for the distance of 1.6 m.