PS-TRUST: Provably Secure Solution for Truthful Double Spectrum Auctions

Truthful spectrum auctions have been extensively studied in recent years. Truthfulness makes bidders bid their true valuations, simplifying greatly the analysis of auctions. However, revealing one's true valuation causes severe privacy disclosure to the auctioneer and other bidders. To make things worse, previous work on secure spectrum auctions does not provide adequate security. In this paper, based on TRUST, we propose PS-TRUST, a provably secure solution for truthful double spectrum auctions. Besides maintaining the properties of truthfulness and special spectrum reuse of TRUST, PS-TRUST achieves provable security against semi-honest adversaries in the sense of cryptography. Specifically, PS-TRUST reveals nothing about the bids to anyone in the auction, except the auction result. To the best of our knowledge, PS-TRUST is the first provably secure solution for spectrum auctions. Furthermore, experimental results show that the computation and communication overhead of PS-TRUST is modest, and its practical applications are feasible.Comment: 9 pages, 4 figures, submitted to Infocom 201

A Semi-Empirical Inversion Model for Assessing Surface Soil Moisture using AMSR-E Brightness Temperatures

In 2004-2005, 2007 and 2009, three major drought disasters occurred in Guangdong Province of southern China, which caused serious economic losses. Hence, it has recently become an important research subject in China to monitor surface soil moisture (SSM) and the drought disaster quickly and accurately. SSM is an effective indicator for characterizing the degree of drought. First, using the brightness temperatures (T[subscript b]) of the Advanced Microwave Scanning Radiometer on the EOS Aqua Satellite (AMSR-E), a modified surface roughness index was developed to map the land surface roughness. Then by combining microwave polarization difference indices (MPDI)-based vegetation cover classification and the modified surface roughness index, a simple semi-empirical model of SSM was derived from the passive microwave radiative transfer equation using AMSR-E C-band T[subscript b] and observed surface soil temperature (T[subscript s]). The model was inverted to calculate SSM. The results show the ability to discriminate over a broad range of SSM (7%~73%) with an accuracy of 2.11% in bare ground and flat areas (R² =0.87), 2.89% in sparse vegetation and flat surface areas (R²=0.85), about 6%~9% in dense vegetation areas and rough surface areas (0.80≤R²≤0.83). The simulation results were also validated using in-situ SSM data (R²=0.87, RMSE=6.36%). Time series mapping of SSM from AMSR-E imageries further demonstrated that the presented method was effective to detect the initiation, duration and recovery of the drought events.This is the author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by Elsevier and can be found at: http://www.journals.elsevier.com/journal-of-hydrology/.Keywords: Drought disaster, Brightness temperature (T[subscript b]), South China, Semi-Empirical model, Surface soil moisture (SSM), AMSR-E, Passive microwave remote sensin

Leucolopha

Key to the species of <i>Leucolopha</i> based on male genitalia <p> 1 Uncus shallowly concaved distally <i>................................................ Leucolopha singulus</i></p> <p>­ Uncus with two long branches bilaterally.................................................................... 2</p> <p> 2 Gnathos extremely swollen basally <i>............................................. Leucolopha undulifera</i></p> <p> ­ Gnathos not swollen as above mentioned <i>........................... Leucolopha sinica,</i> <b>sp. nov.</b></p>Published as part of <i>Chen, Liusheng & Wang, Min, 2006, Notes on the genus Leucolopha (Insecta, Lepidoptera, Notodontidae) with description of a new species from China, pp. 63-68 in Zootaxa 1327</i> on pages 64-65, DOI: <a href="http://zenodo.org/record/174146">10.5281/zenodo.174146</a&gt

Leucolopha Hampson 1896

<i>Leucolopha</i> Hampson, 1896 <p> Type species: <i>Leucolopha undulifera</i> Hampson, 1896, by original designation.</p> <p>Diagnosis. The wing pattern distinguishes this genus from all other notodontid genera. The ground color on the forewing upperside is reddish brown, with a distinct bar in the distal cell; darker basal subbasal, antimedian, postmedian, and submarginal fasciae, the last two sharply angled in the subapical area; and a long sinuous subcostal fascia extending from the base to the apical angle.</p> <p> Redescription. <b>Head</b>: Antennae filiform, with hair tuft basally. Labial palpus strong, porrect, reaching just beyond frontal tuft.</p> <p> <b>Thorax</b>: Forewing broad, apex slightly acute, termen evenly rounded. Sc separately to the costa; R1 separate from other branches of R; R3 and R4 stalked; R5 arising from end of accessory cell; M1 arising from apical angle of cell, M2 arising approximately midway between M1 and M3. Hindwing with Sc+R1 running separately to the costa; Rs and M1 with the same stalk arising from the apical angle of cell, M2 arising approximately between M1 and M3; CuP absent, 1A+2A and 3A present.</p> <p> <b>Abdomen:</b> Male genitalia with uncus shallowly or broadly bifurcated; tegumen bandshaped; gnathos stout, well developed; valva stout, with basal half broader and gradually narrowed to distal half; aedeagus slender and longer; cornutus absent. Female genitalia with posterior apophysis about 2/3 as long as anterior apophysis; anterior lamella and posterior lamella membranous, ill developed; ductus bursa dilated at base, membranous; corpus bursa small and rounded, membranous; signum absent.</p> <p>Distribution (Fig. 1): China, India.</p>Published as part of <i>Chen, Liusheng & Wang, Min, 2006, Notes on the genus Leucolopha (Insecta, Lepidoptera, Notodontidae) with description of a new species from China, pp. 63-68 in Zootaxa 1327</i> on pages 63-64, DOI: <a href="http://zenodo.org/record/174146">10.5281/zenodo.174146</a&gt

Leucolopha undulifera Hampson 1896

<i>Leucolopha undulifera</i> Hampson, 1896 <p> <i>Leucolopha undulifera</i> Hampson, 1896: 460, fig. 245. (Type locality: Assam)</p> <p> <i>Leucolopha undulifera</i>: Gaede, 1934: 201; Kiriakoff, 1968: 65; Fang, 1992: 505; Fang <i>et al.</i>, 1992: 921; Yang & Wu, 1995: 338; Schintlmeister & Fang, 2001: 30; Wu & Fang, 2003: 107 –108.</p> <p>Distribution: China (Hunan & Zhejiang Provinces); India (Assam).</p>Published as part of <i>Chen, Liusheng & Wang, Min, 2006, Notes on the genus Leucolopha (Insecta, Lepidoptera, Notodontidae) with description of a new species from China, pp. 63-68 in Zootaxa 1327</i> on page 65, DOI: <a href="http://zenodo.org/record/174146">10.5281/zenodo.174146</a&gt