Search results for "Avoidance"
showing 10 items of 297 documents
A Comparison of Algorithms for Path Planning of Industrial Robots
2008
In this paper, the path planning problem for industrial robots in environ- ments with obstacles has been solved using four algorithms that implement different methodologies. Our objective is to analyze the characteristics of these algorithms. Consequently, the results (solutions) obtained with each of them are compared through the analysis of three operational parameters that are relevant to determine the qualities of the solutions. These parameters are: the computational time, the distance travelled by the robot and the number of generated configurations. One of the algorithms can be catalogued as indirect and the other three are variations of a direct method. The four algorithms have been…
POLARIZATION-BASED CAR DETECTION
2018
International audience; Road scene understanding is a vital task for driving assistance systems. Robust vehicle detection is a precondition for diverse applications particularly for obstacle avoidance and secure navigation. Color images provide limited information about the physical properties of the object. This results in unstable vehicle detection caused mainly from road scene complexity (strong reflexions, noises and radiometric distortions). Instead, polarimetric images, characteristic of the light wave, can robustly describe important physical properties of the object (e.g., the surface geometric structure, material and roughness etc). This modality gives rich physical informations wh…
Optimised assembly mode reconfiguration of the 5-DOF Gantry-Tau using mixed-integer programming
2010
Pulished version of an article in the journal: Meccanica. Also available from the publisher at: http://dx.doi.org/10.1007/s11012-010-9404-y This paper presents a systematic approach based on Mixed Integer Linear Programming for finding an optimal singularity-free reconfiguration path of the 5-DOF Gantry-Tau parallel kinematic machine. The results in the paper demonstrate that singularity-free reconfiguration (change of assembly mode) of the machine is possible, which significantly increases the usable workspace. The method has been applied to a full-scale prototype and the singularity-free path has been verified both in simulations and with physical experiments using real-time control of th…
Biologically Inspired Vision Architectures: a Software/Hardware Perspective
2007
Even tough the field of computer vision has seen huge improvement in the last few decades, computer vision systems still lack, in most cases, the efficiency of biological vision systems. In fact biological vision systems routinely accomplish complex visual tasks such as object recognition, obstacle avoidance, and target tracking, which continue to challenge artificial systems. The study of biological vision system remains a strong cue for the design of devices exhibiting intelligent behaviour in visually sensed environments but current artificial systems are vastly different from biological ones for various reasons. First of all, biologically inspired vision architectures, which are continu…
Value added taxes on electronic commerce: Obstacles to the EU Commission’s approach
2000
While e-commerce is developing tremendously fast, domestic politics and legislation labour to keep up with the dynamics of the new technology. Among other things, fiscal law is a particularly explosive area. Here, the current proposal of the EU Commission is to apply the already existing value added tax to e-commerce. By doing so, the Commission hopes to prevent the massive threatened shortfall in tax revenue. How is this approach of the Commission to be judged? Are there any alternatives?
Decentralized Coordination System for Multiple AGVs in a Structured Environment
2011
Abstract In this paper, we propose a decentralized coordination algorithm for safe and efficient management of a group of mobile robots following predefined paths in a dynamic industrial environment. The proposed algorithm is based on shared resources and proved to guarantee ordered traffic flows avoiding collisions and deadlocks. In consistency with the model of distributed robotic systems (DRS), no centralized mechanism, synchronized clock, shared memory or ground support is needed. A local inter-robot communication is required among a small number of spatially adjacent robotic units.
The role of success expectation and task-avoidance in academic performance and satisfaction: Three studies on antecedents, consequences and correlates
2003
Abstract To investigate the prospective relationships between individuals’ success expectation and task-avoidance, and their academic achievement and satisfaction, 231 students were examined yearly throughout their university careers in Study 1. It was found that students’ success expectation predicted academic achievement and satisfaction; which, in turn, increased their subsequent success expectation. Moreover, task-avoidance predicted low academic achievement and dissatisfaction, which again was predictive of subsequent task-avoidance. In Study 2, the task-avoidant behavior, and pre-examination anxiety, of 198 students who had participated in Study 1 were examined, and compared with thei…
Learning Environments in Health and Medical Studies: The Mediating Role of Emotional Intelligence
2019
The conventional approach to sustainability is being extended through approaches such as the psychology of sustainability and sustainable development. Under such approaches, the analysis of sustainability also involves understanding improvements in people&rsquo
Cognitive avoidance, positive affect, and gender as predictors of the processing of aversive information
2008
Abstract The study investigated the influence of cognitive avoidance, positive affect, and gender on the evaluation of and memory for threat-related information varying in degrees of aversiveness and ambiguity. Stimulus material consisted of threatening, nonthreatening, and ambiguous pictures. First, valence ratings of the stimuli were collected. This phase was followed by a first memory test. A second memory test was administered three days later. Memory for aversive information was influenced by cognitive avoidance, positive affect, and gender. Avoiders exhibited a comparatively good memory for aversive information in the first (immediate) test and a very poor memory in the delayed testin…
A comparison of two approaches to the assessment of coping styles
1997
Abstract This study examined the association of coping style classifications based on (a) dispositional vigilance (VIG) and cognitive avoidance (CAV) and (b) trait anxiety and social desirability (SD). 281 subjects (123 men, 158 women) completed questionnaires to assess these variables. By applying median splits, subjects were divided into high and low scorers on each dimension. According to both classifications, four coping style groups were operationally defined on the basis of the respective dichotomized variables. Results yielded convergent assignments of repressers (low anxiety and high SD; low VIG and high CAV, respectively), sensitizers (high anxiety and low SD; high VIG and low CAV)…