According to Allamah Tabatabai, action (to do) and affection (to suffer) are identical with motion. Nevertheless, motion in terms of its relation to agent is action, but in terms of its relation to passive nature is affection. Allamah Tabatabai criticized this view. In Mulla Sadra’s view motion in the category of action requires motion within motion which is impossible. This view of Mulla Sadra also was criticized by Tabatabai. According to Tabatabai, all category of accident following the motion of substance, sensible motion in four categories of quantity, place, and position are motion within motion.

Traditionally, contribution of the motion system in motion cueing algorithm is carried out by a simplistic representation of a set of operational space related state variables. Neglecting the nonlinear inverse kinematics of the motion system as the fundamental part of motion cueing system is an unrealistic simplification with undisclosed consequences. In this paper, the complete motion cueing (MC) potential of the simulator in a more realistic manner is investigated by directly penalizing the general nonlinear inverse kinematics of the motion system. The developed real time model predictive control (MPC) motion cueing strategy enables the faithful reproduction of the perception of motion along with effectively constricting the motions within the limited workspace of the motion system. The partially linearized inverse kinematic model of the motion system specifically developed for the purpose of this study along with the constant coefficient inverse kinematics model at particular so-called neutral state value are employed to examine the performance of the motion cueing based on general nonlinear kinematical model. The results of conducted comparative simulations reveal that nonlinear MPC-based motion cueing algorithm enables more effectively handling the platform workspace while faithfully reproducing the realistic perception of motion with no complicated computational burden.

This paper describes current activities in the field of strong motion research in Iran. The seismotectonics and seismological background is explained and current strong motion monitoring in Iran is summarised. The Strong Ground motion Network of Iran started its activities since 1973, and has recorded more than 4200 accelerograms. The highest ground acceleration recorded in this network was 1g at Zanjiran station in 1994 Zanjiran earthquake. At presentthe network consists of 986 digital and 71 analogue accelerograph. ISMN has been installed 92 accelerographs in 54 dams. The geophysical and geotechnical investigations for site geology have been conducted in 100 accelerograph stations.      

Sadr al-Matahin proposed the movement in the category of substance by proposing the theory of substance movement. But he, like other philosophers, did not accept the movement in other categories, especially in categories whose individuals are gradually acquired; Because movement in them causes the phenomenon of "movement in movement" which is impossible from the point of view of all philosophers. In the meantime, in Allameh Tabatabai's view, the acceptance of essential movement requires the acceptance of the occurrence of some kind of secondary but real movement in all categories of the nine transversal categories. Therefore, in Allameh Tabatabai's view, movement within movement is not only impossible, but it is possible to explain the speed and slowness of movements in the light of acceptance of movement within movement. In this essay, in addition to examining the basics of Allameh Tabatabai in explaining the discussion of motion in motion, the views of his students are also examined regarding this issue, and we will see that his students have no fundamental differences with Allameh Tabatabai regarding this theory.

Objective: Post operative vomiting (POV) is one of the most distressing complications after surgery especially in children. Since prophylactic treatment in all patients may be accompanied by many side effects, we conducted a study to evaluate the history of motion sickness (MS) as a risk factor and its predictive value for post operative vomiting in children. Material & Methods: In a prospective cohort study, a sample of 100 consecutive patients aged 1-16 years scheduled for elective surgery under general anesthesia was questioned, a history of MS was sought and patients were observed during next 24 hours for the subsequent development of POV. Findings: The overall incidence of POV was 30%. Twenty one patients were MS positive and 79 were negative. MS-positive children were more likely to vomit than those who were MS-negative (P=0.02). Demographic data, type of surgery, technique of anesthesia, duration of fasting and surgery did not differ significantly between the two groups. The sensitivity of MS as a predictor of POV was 51% and the specificity 90%, giving a positive predictive value of 81% and negative predictive value 80%.Conclusion: motion sickness is associated with POV in this group of children, and its positive predictive value is high.