In this paper, we experimentally demonstrate a 450-nm laser underwater optical wireless transmission system, in which comprehensive investigation is made to show the significant performance improvement of discrete Fourier transform spread multi-tone (DFT-S DMT) as compared conventional quadrature amplitude modulation (QAM-DMT) modulation. DFT-S DMT outperforms QAM-DMT terms bit error rate (BER)...

OBJECTIVE To prospectively characterise treatment persistence and predictors of treatment discontinuation in an Australian relapsing-remitting multiple sclerosis (RRMS) population. METHODS Tertiary MS treatment centres participating in the MSBase registry prospectively assessed treatment utilisation, persistence, predictors of treatment discontinuation and switch rates. Multivariable survival...

Distributed Mission Training (DMT) is a concept composed of promising technologies that support training in a variety of domains such as defense and medicine. To develop and deploy such systems, it is important to account concurrently for hardware and software requirements, given high demands for network bandwidth, computing resources, and complexity of software applications. In this paper, we ...

The discrete multitone (DMT) transceivers have enjoyed great success in high speed data transmission. It is known that when the cyclic prefix is no shorter than the channel impulse response (CIR), the DMT system is IS1 free. For channels with very long CIR such as DSL loops, a time-domain equalizer (TEQ) is typically added at the receiver to shorten the effective impulse response. This paper pr...

Discrete Multitone (DMT) modulation is a multicarrier technique which makes efficient use of the channel, maximizing the throughput by sending different numbers of bits on different subchannels. The number of bits on each subchannel depends on the Signal-to-Noise Ratio of the subchannel. The performance of a DMT system can be further increased by using powerful coding techniques. This paper inv...

© 2013 ETRI Journal, Volume 35, Number 6, December 2013 http://dx.doi.org/10.4218/etrij.13.0213.0404 Dual-mode terminals (DMTs) equipped with cellular and WLAN interfaces have become popular in recent years. Users of DMTs can enjoy high-speed WLAN Internet access and wide area Internet access to cellular networks. However, a DMT may consume power inefficiently when discovering a WLAN with inher...

OBJECTIVE To assess patients' preferences for a range of disease-modifying therapy (DMT) attributes in multiple sclerosis (MS). DESIGN A cross-sectional observational study. SETTING The data reported were from 17 MS units throughout Spain. PARTICIPANTS Adult patients with relapsing-remitting MS. MAIN OUTCOME A conjoint analysis was applied to assess preferences. A total of 221 patients ...

BACKGROUND As the number of elder patients grows, spinal anesthesia for such patients are increasing significantly. Any effort is needed to use the least anesthetic drug for maintaining the anesthesia while avoiding hazards of cardio-pulmonary complications. METHODS American Society of Anesthesiologists physical status classification I and II, Forty five elderly patients (≥ 60 years) who rece...

Diversity–multiplexing tradeoff (DMT) presents a compact framework to compare various MIMO systems and channels in terms of the two main advantages they provide (i.e. high data rate and/or low error rate). This tradeoff was characterized asymptotically (SNR-> infinity) for i.i.d. Rayleigh fading channel by Zheng and Tse [1]. The asymptotic DMT overestimates the finite-SNR one [2]. In this paper...

In this two-part paper, the DMT of cooperative multi-hop networks is examined. The focus is on single-source single-sink (ss-ss) multi-hop relay networks having slow-fading links and relays that potentially possess multiple antennas. In this first part, some basic results that help in determining the DMT of cooperative networks as well as in characterizing the two end-points of the DMT for arbi...