In cognitive radio networks (CRNs), spectrum trading is an efficient way for secondary users (SUs) to achieve dynamic spectrum access and to bring economic benefits for the primary users (PUs). Existing methods requires full payment from SU, which blocked many potential “buyers”, and thus limited the PU’s expected income. To better improve PUs’ revenue from spectrum trading in a CRN, we introdu...

Abstract Deficiencies of the four spectral formats i.e., 2%/50-yr, 5%/50-yr, 10%/50-yr and AASHTO (American Association State Highway Officials) 2009 demand modification for bridge design application in Canada. Among them spectrum is dropped from current investigation as its difference with Canadian Bridge Design Code (CHBDC) 2006 too large to modify. This study introduces an approach calibrati...

Abstract Although Brazilian seismic activity is defined as low to moderate, it known that intraplate earthquakes can also be associated high intensities. In Brazil, the state of Rio Grande do Norte (RN) one most seismically active areas, but there no specific study evaluate hazard in this region. This paper presents analyses towards improving map, peak ground acceleration value and response spe...

Taiwan is located on the Pacific seismic belt, and the soil conditions of Taiwan’s offshore wind farms are softer than those in Europe. To ensure safety and stability of the offshore wind turbine supporting structures, it is important to assess the offshore wind farms seismic forces reasonably. In this paper, the relevant seismic and geological data are obtained for Chang-Bin offshore wind farm...

Analysis of the seismic risk to a structure requires assessment of both the rate of occurrence of future earthquake ground motions hazard and the effect of these ground motions on the structure response . These two pieces are often linked using an intensity measure such as spectral acceleration. However, earth scientists typically use the geometric mean of the spectral accelerations of the two ...

OBJECTIVE To examine the effect of changing age at diagnosis on the diagnosed prevalence of autism among different birth cohorts. DESIGN Population-based cohort study. SETTING Children were identified in the Danish Medical Birth Registry and psychiatric outcomes were obtained via linkage with the Danish National Psychiatric Register. PARTICIPANTS All children born in Denmark from January ...

AIM Depression is thought to be a predictor of poor survival among cancer patients. In our study, we aimed to investigate the association between depression and survival in patients with gastric cancer. METHODS The subjects were a total of 300 patients aged 20-75 years who had histological confirmed diagnosis of gastric cancer from January 2004 to May 2006. Three months after patients diagnos...

IMPORTANCE To date, this is the first population-based study to examine the recurrence risk for autism spectrum disorders (ASDs), including time trends, and the first study to consider the ASDs recurrence risk for full- and half-siblings. OBJECTIVES To estimate the relative recurrence risk for ASDs in a Danish population, including recurrence in full- and half-siblings, and to examine time tr...