Systematic review and meta-analysis of studies of biliary reconstruction in adult living donor liver transplantation

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Approximate BER performance of generalized selection combining in Nakagami-m fading

The error performance of generalized selection combining (GSC), which optimally combines the K highest signal-to-noise ratio (SNR) signals out of L total diversity signals, in Nakagami-m fading was recently evaluated using moment generating function (MGF) of the GSC output SNR. However, no single closed-form expression for the MGF exists for arbitrary K and L. In fact, closed-form expression for the MGF is possible only for individual combination of K and L. In this letter, a single closed-form expression for approximating the MGF is, therefore, derived and employed in evaluating the approximate error performance. Although the approximation is only applicable for GSC with K being a factor of L, it nonetheless achieves a high degree of accuracy.published_or_final_versio

Performance analysis of bandwidth efficient coherent modulation schemes with L-fold MRC and SC in Nakagami-m fading channels

This paper presents the average symbol error rates (SERs) of the 16-ary phase shift keying (16PSK), 16-ary amplitude phase shift keying (16APSK) and 16-ary quadrature amplitude modulation (16QAM) with L-fold maximal ratio combining (MRC) and selection combining (SC) space diversity receptions over Nakagami-m fading channels. Numerical results manifested error performance improvement when L-fold MRC and SC diversity receptions were employed. Error performance improvement attributed to an L=2 MRC diversity reception is comparable with that attributed to an L=4 SC diversity reception for the above three 16-ary modulation systems in a Nakagami-m fading channel with m of 5.published_or_final_versio

Acute puerperal uterine inversion : Case report

Acute puerperal uterine inversion is a rare potentially life-threatening complication of the third stage of labour that should be expeditiously managed to avert maternal mortality. A 21-year primigravida who was admitted in labour had a spontaneous vertex delivery and her third stage of labour was complicated by uterine inversion. Manual repositioning of the uterus failed, but was successfully accomplished by Haltains surgical procedure. Prompt recognition and treatment is vital for successful management of acute uterine inversion

The changing epidemiology of recurrent pyogenic cholangitis

Recurrent pyogenic cholangitis is prevalent in Hong Kong and East Asia. While the recent influx of Asian immigrants has resulted in more cases appearing in the West, over the past three decades, the overall incidence in East Asia has been in decline. The experience of the Queen Mary Hospital and other hospitals in the region has been confirmed by comprehensive surveys. The decline in incidence has been attributed to the improved economic situation and living standards with the associated westernisation of diet.published_or_final_versio

Combined diversity sequence estimation receiver for wideband digital mobile radio

An investigation is presented into the performance of a novel type of sequence estimation equalisation receiver. The receiver incorporates space diversity to further enhance the signal reception in multipath fading environments. It is shown that the receiver complexity is reduced by approx. 90% with virtually no performance loss compared to that of the MLSE.published_or_final_versio

An extra-adrenal pheochromocytoma mimicking a primary liver cancer

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