Hae Won Jung

A new line code for 10-Gigabit Ethernet: MB810

The 10-Gigabit Ethernet (10GbE) is emerging as an alternative for solving the bottleneck of wide area network (WAN) links. Currently, the choice of line codes is being an issue in the 10GbE standardization. We review the candidates for the 10GbE line code, and propose a new line code, MB810, for 10GbE. Its spectrum is bounded within the Nyquist band and has no DC component. This code can improve the transmission rate-distance limitation of the optical fiber. We describe the design concept of the MB810 and its design procedure, and compare its characteristics with the NRZ and 8B/10B codes.

Actinomyces meyeri Empyema: A Case Report and Review of the Literature

Actinomyces meyeri is an uncommon cause of human actinomycosis. Here, we report a rare case of empyema caused by A. meyeri. A 49-year-old male presented with a history of 10 days of dyspnea and chest pain. A large amount of loculated pleural effusion was present on the right side and multiple lung nodules were documented on radiological studies. A chest tube was inserted and purulent pleural fluid was drained. A. meyeri was isolated in anaerobic cultures of the pleural fluid. The infection was alleviated in response to treatment with intravenous penicillin G (20 million IU daily) and oral amoxicillin (500u2009mg every 8 hours) for 4 months, demonstrating that short-term antibiotic treatment was effective.