BACKGROUND: RT was primarily introduced in Saudi Arabia by military hospitals beginning in the late 1970s. Currently, Saudi Arabia does not have a certification board for RT and, therefore, all of the RTs in Saudi Arabia who graduated from national colleges do not have credentials. PURPOSE: The purpose of the study was to evaluate the need for developing a board for RT in Saudi Arabia, and also...

In this work we study the collision probability, saturation throughput and statistical delay for the carrier sense multiple access collision avoidance (CSMA/CA) protocol with request to send and clear to send (RTS/CTS) mechanism in the case of frequency channel division. We propose in this paper a modified version of CSMA/CA-RTS/CTS to be compatible with the channel repartition technique and we...

-Increasing returns to scale (RTS) is frequently postulated as affecting productivity in surface coal mining. However, it is not clear whether increased capital intensity or increased output is the relevant phenomenon. A ray-homothetic production function that incorporates the capital-labor mix and fixed site geology into the scale elasticity is presented and estimated with a micro (mine level)...

Commands to blink were embedded within pictures of faces and simple geometric shapes or forms. The faces and shapes were conditioned stimuli (CSs), and the required responses were conditioned responses, or more properly, Cartesian reflexes (CRs). As in classical conditioning protocols, response times (RTs) were measured from CS onset. RTs provided a measure of the processing cost (PC) of attend...

Adobe Flash can be used to run complex psychological experiments over the web. We examine the reliability of using Flash to measure reaction times (RTs), using a simple binary choice task, implemented both in Flash and using a Linux-based system known to record RTs with millisecond accuracy. Twenty-four participants were tested in the laboratory using both implementations; they also completed t...

In Multi-channel systems control packets handshake reserves both control and data channels where a dedicated control channel is implemented. RTS and CTS packets should sense the medium and agree on a specific data channel. The process is long and it wastes resources when there is no agreement. We propose an RTS based channel reservation and access scheme. The CTS agrees with RTS to reserve a sp...

Observers made speeded old-new recognition judgments of color stimuli embedded in a multidimensional similarity space. The paradigm used multiple lists but with the underlying similarity structures repeated across lists, to allow for quantitative modeling of the data at the individual-participant and individual-item levels. Correct-rejection response times (RTs) got systematically faster as the...

A significant theme in data envelopment analysis (DEA) is the stability of returns to scale (RTS) classification of specific decision making unit (DMU) which is under observed production possibility set. In this study the observed DMUs are public postal operators (PPOs) in European Union member states and Serbia as a candidate country. We demonstrated a sensitivity analysis of the inefficient P...

Hierarchical data in which leaf nodes have associated attributes appear in several applications. Rectangular Treemaps (RTs) were designed to display this type of data by tightly packing cells representing the tree nodes, with additional information stored in the cell sizes and/or colors. For dynamic hierarchies, RTs have to obey several requirements regarding the optimal aspect ratio of cells, ...

BACKGROUND Skiing and snowboarding have become increasingly popular since the inception of the winter X-Games in 1997. PURPOSE To determine (1) rate of return to sport (RTS) to the winter X-Games following anterior cruciate ligament (ACL) reconstruction and (2) performance upon RTS following ACL reconstruction. HYPOTHESES There is a high rate of RTS to the winter X-Games in subjects undergo...