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ICT is currently responsible for 4% of the EU's carbon emission. In this industry, data centers are growing quickly to supply the escalating services and application demands. The design of high performance and energy-efficient data center networks is an important issue while still being confronted with many challenges such as scalability, reliability, etc. On the other hand, the network devices' difference in power consumption as well as property make the researching process more difficult to construct a routing algorithm that effectively works with various devices. This paper presents a novel energysaving scheme that can flexibly control and route traffic relying on the difference of network devices' energy-profile. By using OpenFlow mechanism and Net-FPGA cards based on Software Defined Networks, we successfully deploy energy-aware data center network, and its experimental results show that the novel scheme improves the power saving level and energyefficiently works based on the switches' energy-profile.

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Penile annular secondary syphilis mimicking annular lichen planusDear Editor, Annular secondary syphilis is caused by Treponema Pallidum, which rarely occurs in the genital region. 1 We herein describe a case of annular secondary syphilis mimicking annular lichen planus with nonspecific location and histologic hallmarks.A 32-year-old Vietnamese male visited our hospital with annular lesions on the penile shaft. He had a history of oralgenital contact with an anonymous male 3 months prior to presentation. He denied any personal history of sexually transmitted diseases. Physical examination revealed annular erythematous plaques with well-defined, scaly borders on the

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