In Dekel and Feinberg (2004) we suggested a test for discovering whether a potential expert is informed of the distribution of a stochastic process. This category test requires predicting a “small”– category I – set of outcomes. In this paper we show that there is a randomized category test that cannot be manipulated, i.e. such that no matter how the potential expert randomizes his prediction, ...

One of the most important problems to solve in Solid Modeling is computing boolean operations for solids (union, intersection and difference). In this paper we present a method to obtain the boolean operators based on covering the solids by simplices without evaluating the boundary. The representation of the obtained solid does not correspond with the minimal boundary of the solid, but using th...

Abstract Biometric is an emerging technique for user authentication thanks to its efficiency compared the traditional methods, such as passwords and access-cards. However, most existing biometric systems require cooperation of users provide only a login time authentication. To address these drawbacks, we propose in this paper new, efficient continuous scheme based on newly trait that still unde...

Kinematic studies have indicated that when a subject reaches to grasp an object, the movement consists of two primary components: (a) a transport phase whereby the hand is brought towards the object and (b) a grip phase whereby the hand changes shape in anticipation of the grasp. Using a visual perturbation paradigm, we investigated the effect of different grip component strategies upon the tra...

The posterior parietal cortex is included in the dorsal cortical visual pathway underlying the three-dimensional (3-D) visual recognition of space and objects. The neurons in the lateral intraparietal area (LIP) respond visually to the three-dimensional objects, whereas those in the anterior intraparietal area (AIP) respond to hand movements to grasp them. LIP receives visual inputs from V3A, w...

An optimization-based model for power-grip posture prediction was proposed. The model was based on the premise that the hand prehensile configuration in a power grip best conforms to the object shape. This premise was embodied by an optimization procedure that minimized the sum of distances from the finger joints to the object surface. The model was evaluated against data from an experiment tha...