The purpose of this study was to investigate the usefulness of Fuji Computed Radiography (FCR) 5501D by comparing it with FCR 5000 and a screen-film system (S/F). Posteroanterior chest radiographs of ten patients with no abnormality on chest CT scans were obtained with FCR 5501D, FCR 5000, and S/F. Six observers (three radiologists and three radio-technologists) evaluated the visibility of nine...

Cognitive Radio (CR) is of great interest to technologists because of significantly increasing the spectrum efficiency. The Secondary user (SU) which is the unlicensed user must constantly study the actions of Primary user (PU), which is the licensed user. The location information of PU can enable several key functions of CR networks, such as aiding spectrum policy enforcement, intelligent loca...

prevalence of thyroid nodules diagnosed by ultrasonography has been reported to be high (about 50%) probably due to iodine deficiency in our region. most thyroid nodules benign but some require treatment for cosmetic reasons or subjective symptoms. the conventional method of treatment in iran is surgery. for the first time in iran, from february 2016, 50 patients with 63 nodules (solid or cysti...

We try to capture the essence of information technology and computer science, arguing that information technologists have the same principal goal as all technologists: to create machines with certain properties. To achieve this, they formalize the problem, i.e. abstract the properties into a specification and invent or develop a schema, i.e. an abstraction of the machine’s structure. Subsequent...

This paper explores what educational technologists in one South African Institution consider innovation to be. Ten educational technologists in various faculties across the university were interviewed and asked to define and answer questions about innovation. Their answers were coded and the results of the overlaps in coding have been assimilated into a definition. Soft systems methodology (SSM...

Technologists and human factors practitioners tend to approach the measurement of situation awareness from different perspectives. Technologists compare the difference between the data available in the environment with what has been detected by the sensors built into a system. Human factors practitioners focus on perception and cognition to the exclusion of the technological parts of the system...

In 1972, Edsger Dijkstra claimed that computers had only introduced the new problem of learning to use them effectively. This is especially true in 2015 with regard to powerful new educational technologies. This article describes the challenges that 21st century educational technologists are, and will be, addressing as they undertake the effective integration of new technologies into K-12 educa...

We try to capture the essence of information technology and computing science, arguing that information technologists have the same principal goal as all technologists: to create machines with certain properties. To achieve this, they formalize the problem, i.e. abstract the properties into a specification and invent or develop a schema, i.e. an abstraction of the machine’s structure. Subsequen...