Climate studies require long data records extending the lifetime of a single remote sensing satellite mission. Precise satellite altimetry exploring global and regional evolution of the sea level has now completed a two decade data record. A consistent long-term data record has to be constructed from a sequence of different, partly overlapping altimeter systems which have to be carefully cross-...

The cross-correlations between price fluctuations of 201 frequently traded stocks in the National Stock Exchange (NSE) of India are analyzed in this paper. We use daily closing prices for the period 1996-2006, which coincides with the period of rapid transformation of the market following liberalization. The eigenvalue distribution of the cross-correlation matrix, C, of NSE is found to be simil...

Time series of discrete random variables present unique statistical challenges due to serial correlation and uneven sampling intervals. While regression models for a series of counts are well developed, only few methods are discussed for the analysis of moderate to long (e.g. from 20 to 152 observations) binary or binomial time series. This article suggests generalized linear mixed models with ...

This paper proposes a new approach to estimate panel data models with group specific parameters when group membership is not known. We first create a set of “pseudo” threshold variables based on time series estimation of the individual specific parameters. We then use these variables to stratify individuals. The problem of parameter heterogeneity is turned into estimation of a panel threshold m...

P oters with implants in female 18 years old or more; 2 the use of intraoperative irrigation with antibiotic; and 3 documentation of capsular contracture. Our primary outcome was postoperative rate of severe capsular contracture (Baker III and IV). We assessed the methodologic quality of included studies using validated tools (JADAD and MINORS). Pooled random effects estimates and 95% confidenc...

Avian point counts for population monitoring are often collected over a short timespan (e.g., 3–5 years). We examined whether power was adequate (power $0.80) in short-duration studies to warrant the calculation of trend estimates. We modeled power to detect trends in abundance indices of eight bird species occurring across three floodplain habitats (wet prairie, early successional forest, and ...

Consider the optimal control of a manufacturing system consisting of stages in which a single consumable good is produced in a random jump environment. At each stage of the manufacturing process there are workstations that can fail and be repaired. The workstations are assumed to have different operating parameters for a given stage. The mean time to failure for a given workstation, on a given ...

This paper proposes a marginalized model for repeated or otherwise hierarchical, overdispersed time-to-event outcomes, adapting the so-called combined model for time-to-event outcomes of Molenberghs et al (2012), who combined gamma and normal random effects. The two sets of random effects are used to accommodate simultaneously correlation between repeated measures and overdispersion. The propos...

Multi-sensor image fusion has been widely used in many areas. In this paper, a region-based method using NSCT and fuzzy logic is proposed to enhance trees’ contour and enrich the information in images. Firstly, the required source images are segmented, which are then decomposed using the NSCT transform. In low frequency domain, the fuzzy fusion method is used. And in high frequency domain, a re...