In this paper, the design of a compact low cost switched-beam antenna for users in Wireless Local Area Networks (WLAN) is introduced. Four antenna elements are arranged in 2×2 lattice. The modification of beamforming network based on Butler matrix is originally proposed for 2×2 planar array. The design is verified through computer simulations and also the prototype of automatic switched-beam an...

The genus Peratophyga Warren, 1894 in China is reviewed. Six species are recognized, of which P. crista sp. nov. and P. recta sp. nov. are described. P. hyalinata grata (Butler, 1879) is restored to specific rank as P. grata (Butler, 1879) stat. rev. P. grata totifasciata Wehrli, 1923 comb. nov. is proposed. P. xanthyala (Hampson, 1896) and P. grata grata (Butler, 1879) are newly recorded for C...

Five experiments were conducted to investigate a proposal by Butler, Kang, and Roediger (2009) that congruity (or fit) between target items and processing tasks might contribute, at least partly, to the mnemonic advantages typically produced by survival processing. In their research, no significant survival advantages were found when words were preselected to be highly congruent or incongruent ...