abstract this article tries to look at the jewels of the ancient luristan (nowadays luristan province and some parts of ilam and kermanshah provinces), and to have a survey on this precious art and its typology. these jewels have been gathered by way of many scientific and unscientific excavations at last decades in the ancient sites like: kalmakareh, varkaboud, kalvali, sorkh dom, kamtarlan (k...

Image artifacts are encountered daily in clinical ultrasonography and may be a source of confusion for the interpreting sonologist. The understanding of the mechanisms behind their production allows recognition of artifacts and avoids misinterpretations and incorrect diagnoses. Some artifacts may be avoidable and arise secondary to improper scanning technique. Other artifacts are generated by t...

This article analyzes the role of artifacts in Information Systems regarding their capability to store and transfer design knowledge and to support the researcher-practitioner collaboration. A definition for design artifacts and their characteristics is presented that distinguishes between prototypes and products. Based on three examples for artifacts from the field of Information Systems, defi...

Abstract. The generation of artifacts during sample preparation must be considered in paleobiological studies, particularly the Ediacaran and Cambrian, since such can assume forms similar to those cloudinids other problematic taxa commonly described samples from these systems. Chemical reactions between hydrogen peroxide sulfides lead formation tubular vase-shaped structures. visual description...