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Two alternating agentive nominals in Persian are distinguished by two different agentive, derivational suffixes/forms, i.e. the simple derived de-verbal nouns and synthetic compounds formed with the suffix -ande, as in gu-y-ande "reporter/speaker," xân-ande "singer," pâk-kon-ande "cleaner" versus the zero-derived synthetic compounds as in soxan-gu-Ø "speaker," "âvâz-xân-Ø "song-singer," barf-pâk-kon-Ø "windshield wiper." It is discussed that the alternation, and lack of alternation, between the two is totally predictable and productive. While the simple derived and synthetic nominals with -ande are eventive, denoting an underlying action performed by an agent external argument, their equivalent alternating synthetic compounds with the zero-suffix are non-eventive, denoting a result nominal with an instrumental or agentive denotation. The analysis is cast in the framework of Distributed Morphology.

Performing various experimental, theoretical, and numerical investigations for better understanding of behavioural characteristics of metals under impact loading is of primary importance. In this paper, application of smoothed particle hydrodynamics (SPH) method in impact mechanics is discussed and effective parameters on impact strength of an aluminum plate are investigated. To evaluate the accuracy of smoothed particle hydrodynamics method for simulating impact, Recht and Ipson model is first provided thoroughly for both Rosenberg analytical model and smoothed particle hydrodynamics method, and then plots of initial velocity-residual velocity and initial velocity-absorbed energy for target of aluminum 6061-T651 are presented. The derived information and simulation results expresses that the maximum error percentage of smoothed particle hydrodynamics method in compared with Rosenberg analytical model is within an acceptable range. Therefore, the results of smoothed particle hydrodynamics method verify the Rosenberg analytical model with high accuracy. Results reveal that higher initial impact velocity decreases the time of projectile penetration, and so penetration depth and length as well as the local damage rate of plate increases.