We present a simple and accurate semi-analytic methodology for performance evaluation of wireless video transmission in multicode DS-CDMA (MC-CDMA). Based on the novel approach (as well as on entire system simulations), we analyze performance of H.263 in an IS-95B system over slow fading channels at low bit rates. Peak signal-to-noise ratio (PSNR) values for various video test sequences demonst...

A new objective, full-reference metrics of image quality is proposed in this paper. It should match perceptual (subjective) image quality assessment in a better way. The proposed method consists of two quality measures which separately indicate image quality on edges and in texture areas which are calculated in a three-step algorithm. The “soft mask” is initially found for separation in edge an...

A direct conversion modulator-demodulator with even harmonic mixers with emphasis on noise analysis is presented. The circuits consist of even harmonic mixers (EHMs) realized with antiparallel diode pairs (APDPs). We evaluate the different levels of I/Q imbalances and DC offsets and use signal space concepts to analyze the bit error rate (BER) of the proposed transceiver using M-ary QAM schemes...

This study explored factors associated with successful development and implementation of medication error reporting (MER) systems in different healthcare contexts. A descriptive online questionnaire comprising of structured and open-ended questions was responded to by 16 medication safety experts in 16 countries. The present paper describes the rich and multidimensional qualitative data from th...

Medication errors can be frequent in hospitals; these errors are multidisciplinary and occur at various stages of the drug therapy. The present study evaluated the seriousness, the type and the drugs involved in medication errors reported at the Hospital de Clínicas de Porto Alegre. We analyzed written error reports for 2010-2011. The sample consisted of 165 reports. The errors identified were ...

This article examines the evolving role of HIM professionals in research. In terms of both growth and credibility, it is important that HIM as a profession become more integrally involved in the research process. Specifically, this article examines the expanding role of the HIM professional in research-related activities and data management activities. For illustrative purposes, examples from r...

BACKGROUND Many studies address the prevalence of medication errors but few address medication errors serious enough to be regarded as malpractice. Other studies have analyzed the individual and system contributory factor leading to a medication error. Nurses have a key role in medication administration, and there are contradictory reports on the nurses' work experience in relation to the risk ...

OBJECTIVE This study aims to determine the likelihood that rural nurses perceive a hypothetical medication error would be reported in their workplace. DESIGN This employs cross-sectional survey using hypothetical error scenario with varying levels of harm. SETTING Clinical settings in rural Tasmania. PARTICIPANTS Participants were 116 eligible surveys received from registered and enrolled...

BACKGROUND Health professionals strive to deliver high-quality care in an inherently complex and error-prone environment. Underreporting of medical errors challenges attempts to understand causative factors and impedes efforts to implement preventive strategies. Audit with feedback is a knowledge translation strategy that has potential to modify health professionals' medical error reporting beh...

|It is shown that the bit LLR value in soft-output decoding of a binary linear block code with BPSK modulation can be closely modeled by a second BPSK modulation of reduced noise power. With this modeling, it is possible to provide bit error performance approximations to help in the evaluation of binary linear codes. This can also be used in the design of communications systems which require kn...