Psychosis in Three Patients with Vitiligo

Abstract: Psychotic disorders have been observed in association with some autoimmune disorders. Moreover, autoimmune mechanisms have been recently considered in evaluation of schizophrenia spectrum disease managements. Vitiligo is one of the autoimmune diseases, but there is no report of vitiligo association with psychosis. We report three patients with vitiligo and schizophrenia spectrum disease that are indicative of the role of autoimmunity in psychosis. Moreover, unusual manifestation and poor response to treatment in the reported cases show that autoimmunity can complicate the prognosis of psychosis. Keywords: Vitiligo, Autoimmune, Schizophrenia, Psychosi

Rare Variant of Lycanthropy and Ecstasy: Case Report

Abstract: Lycanthropy is an unusual belief or delusion in which the patient thinks that he/she has been transformed into an animal. In rare cases, the patient believes that another person has been transformed into an animal. In this case report, a patient who had an uncommon variant of lycanthropy is introduced. The patient’s symptoms had appeared after consumption of ecstasy. This shows the occurrence of uncommon and rare psychosis after ecstasy drug use especially in susceptible patients to schizophrenia. Ecstasy can induce paranoid psychosis similar to schizophrenia. It seems that in the presented case, ecstasy had a role in the incidence of the underlying suceptibility of the patient to schizophrenia. Keywords: Lycanthropy, Methylenedioxymethamphetamine (MDMA

Estimation and Calibration of Robot Link Parameters with Intelligent Techniques

Abstract: Using robot manipulators for high accuracy applications require precise value of the kinematics parameters. Since measurement of kinematics parameters are usually associated with errors and accurate measurement of them is an expensive task, automatic calibration of robot link parameters makes the task of kinematics parameters determination much easier. In this paper a simple and easy to use algorithm is introduced for correction and calibration of robot kinematics parameters. Actually at several end-effecter positions, the joint variables are measured simultaneously. This information is then used in two different algorithms least square (LS) and Genetic algorithm (GA) for automatic calibration and correction of the kinematics parameters. This process was also tested experimentally via a three degree of freedom manipulator which is actually used as a coordinate measuring machine (CMM). The experimental Results prove that the Genetic algorithms are better for both parameter identification and calibration of link parameters