Weingarten Realty Investors

About: Weingarten Realty Investors is a based out in . It is known for research contribution in the topics: Mobile robot & Piston. The organization has 892 authors who have published 1284 publications receiving 12726 citations.

Robust multi-algorithm object recognition using Machine Learning methods

Abstract: Robust object recognition is a crucial requirement for many robotic applications. We propose a method towards increasing reliability and flexibility of object recognition for robotics. This is achieved by the fusion of diverse recognition frameworks and algorithms on score level which use characteristics like shape, texture and color of the objects. Machine Learning allows for the automatic combination of the respective recognition methods' outputs instead of having to adapt their hypothesis metrics to a common basis. We show the applicability of our approach through several real-world experiments in a service robotics environment. Great importance is attached to robustness, especially in varying environments.

Refiner for grinding of fibrous material

Abstract: The teeth of the stator and rotor of the refiner are each formed with a surface layer on the leading flanks which is harder than the end faces so as to maintain a sharp cutting edge. The hardness of the surface layer is at least 600 HB while the end face is of a hardness of from 280 to 320 HB.

University students’ basic psychological needs, motivation, and vitality before and during COVID-19: A Self-Determination Theory approach

Abstract: Self-determination theory assumes that the basic psychological needs for autonomy, competence, and relatedness are associated with motivational regulation. As these basic psychological needs may have been affected by the shift to distance learning, students’ motivational regulation and vitality may have suffered as well. The purpose of this study was to examine the motivational regulation, satisfaction, or frustration of the basic psychological needs and vitality of university students before and after the transition to forced distance learning during the COVID-19 pandemic: Two student samples from Austria and Germany were studied: One was surveyed before the conversion to distance learning (N = 1,139) and the other at the beginning of forced distance learning (N = 1,835). The instruments used were the Scales for the Measurement of Motivational Regulation for Learning in University Students (SMR-L), the German version of the Basic Psychological Needs Satisfaction and Frustration Scale, a scale developed by the authors to differentiate the assessment of social relatedness, and the German version of the Subjective Vitality Scale. The results show that the satisfaction of basic psychological needs was significantly lower and the frustration thereof substantially higher during the distance learning period than before the pandemic. Intrinsic motivation and identified regulation were significantly lower during the forced distance learning period, and more controlled forms of motivation were higher than before the pandemic. Structural equation models showed that 42% of the students’ vitality can be explained by motivational regulation and the satisfaction and frustration of their basic needs. Motivational regulation styles functioned (differentiated according to the degree of autonomy) as mediating variables between basic needs and vitality. In terms of theoretical implications, the distinction between approach and avoidance components of introjected regulation was shown to be adequate and necessary, as they explain the outcome vitality differently. The support and avoidance of frustration of basic psychological needs should be considered in distance learning to promote the quality of motivation and students' vitality.

Multi-stage press for pressing large workpieces - has work-table to receive workpiece between work stations

Abstract: The multistage press for pressing large workpieces has several work stations, each with a set of tools, arranged one behind another. The workpiece is transferred from one work station to another by means of at least one, or pref. two, transfer rails (26). This rail is equipped with suction pads to grip the workpiece and moves vertically upwards and then horizontally. The press is provided with worktables between adjacent work stations. The workpiece is placed on one of these worktables whilst being transferred between work stations.

Clamping device for panels especially glass panes

Abstract: For a clamping element for a panel material, in particular for use in pairs for the purpose of connecting in each case two panels or for the purpose of fastening one panel on a wall or the like, in each case at least one bore being provided in the panels in order to receive and brace in each case at least one clamping element, the following functionally interacting structural elements are proposed: a) a masking screw (4) which can be plugged through the bore (2) and rests on one side of the panel (1) with its screw head; b) a spacer sleeve which can be screwed on from the second side of the panel (1) until it comes to rest on the panel (1) on the masking screw (4) and which has two mutually parallel and eccentric grooves (10); c) an inner sleeve (9) which can be connected, by means of a clamping screw (8), to the spacer sleeve (5) and has two grooves (10) which are conjugate to the grooves (10) of the spacer sleeve (5); and d) a pair of connecting bars (11) which are complementary to the shape of the grooves (10), which are inserted into the groove pairings between spacer and inner sleeve and can be braced by means of the clamping screw (8).