We propose an approach to stylometry based on a Bayesian Dirichlet process mixture model using mu... more We propose an approach to stylometry based on a Bayesian Dirichlet process mixture model using multino-mial word frequency data. The parameters of the multi-nomial distribution of word frequency data are the "word prints" of the author. Our approach is based on model-based clustering of the vectors of probability values of the multinomial distribution. The underlying clusters identify different writing styles that lead to helping in author at-tribution. The methodology is applied to the problem of authorship attribution involving the Federalist papers.
Spotted wing drosophila, Drosophila suzukii (Matsumura) (Diptera: Drosophilidae), was monitored f... more Spotted wing drosophila, Drosophila suzukii (Matsumura) (Diptera: Drosophilidae), was monitored from 2010 to 2014 in 314-828 sites located in interior fruit-growing regions of OR and WA, United States, and BC, Canada, using traps baited with apple cider vinegar or sugar-water-yeast. Seasonal population dynamics and sex ratios were summarized for berry, cherry, stone fruit, grape, non-crop host plants, non-host sites, and for conventional IPM, certified organic, backyard, and feral sites, by region and year. Overwintering was detected in all regions and years, despite winter temperatures below -17°C. A spatial analysis was conducted using a Geographic Information System (GIS), daily weather data, geomorphometric measures of terrain, distance to water, and other variables, at each site. Overwintering success at a site, measured as Julian week of first capture of D. suzukii, was significantly related (R2 = 0.49) in cherry habitats to year, agronomic treatment, and number of winter days...
Http Dx Doi Org 10 1080 03610928908830106, Jun 27, 2007
ABSTRACT Modified maximum likelihood estimators of the parameters of a bivariate normal distribut... more ABSTRACT Modified maximum likelihood estimators of the parameters of a bivariate normal distribution are developed when the smallest and largest observations on one of the two components are censored. These estimators are shown to be unbiased and efficient for large n. For testing the null hypothesis statistic is defined.
This article considers three practical hypotheses involving the equicorrelation matrix for groupe... more This article considers three practical hypotheses involving the equicorrelation matrix for grouped normal data. We obtain statistics and computing formulae for common test procedures such as the score test and the likelihood ratio test. In addition, statistics and computing formulae are obtained for various small sample procedures as proposed in Skovgaard (2001). The properties of the tests for each of the three hypotheses are compared using Monte Carlo simulations.
This paper describes robust procedures for estimating parameters of a mixed effects linear model ... more This paper describes robust procedures for estimating parameters of a mixed effects linear model as applied to longitudinal data. In addition to fixed regression parameters, the model incorporates random subject effects to accommodate between-subjects variability and autocorrelation for within-subject variability. Robust empirical Bayesian estimation of subject effects is briefly discussed. As an illustration, the procedures are applied to data from a multiple sclerosis clinical trial.
Abstract: A great part of King Alfred's renown comes from his translations of Latin writings... more Abstract: A great part of King Alfred's renown comes from his translations of Latin writings into Old English. The group of translations that he gets credit for, however, has changed over the years. Presently four translations are attributed to him: the Pastoral Care, the Boethius, ...
ABSTRACT Modified maximum likelihood estimators of the parameters of a multivariate normal distri... more ABSTRACT Modified maximum likelihood estimators of the parameters of a multivariate normal distribution are developed when the smallest or largest observations on one of the components are censored. These estimators are used to construct tests for means and correlation coefficients. The robustness of these tests to deviations from normality is investigated.
ABSTRACT In this note initial block technique has been used for construction of some classes of 3... more ABSTRACT In this note initial block technique has been used for construction of some classes of 3-associate PBIB designs, known as rectangular designs.
Communications in Statistics - Theory and Methods, 1985
ABSTRACT Optimality of experimental designs for spatially correlated observations is investigated... more ABSTRACT Optimality of experimental designs for spatially correlated observations is investigated.come two dimensional correlation structures are discussed and an attempt has been made to find optimal or nearly optimal design for each sitution.The solution lend to designs similar to that used for repeated measurements.The relative efficiency of the proposed designs in comparison to randomized latin square designs is tabulated for some cases.
We propose an approach to stylometry based on a Bayesian Dirichlet process mixture model using mu... more We propose an approach to stylometry based on a Bayesian Dirichlet process mixture model using multino-mial word frequency data. The parameters of the multi-nomial distribution of word frequency data are the "word prints" of the author. Our approach is based on model-based clustering of the vectors of probability values of the multinomial distribution. The underlying clusters identify different writing styles that lead to helping in author at-tribution. The methodology is applied to the problem of authorship attribution involving the Federalist papers.
Spotted wing drosophila, Drosophila suzukii (Matsumura) (Diptera: Drosophilidae), was monitored f... more Spotted wing drosophila, Drosophila suzukii (Matsumura) (Diptera: Drosophilidae), was monitored from 2010 to 2014 in 314-828 sites located in interior fruit-growing regions of OR and WA, United States, and BC, Canada, using traps baited with apple cider vinegar or sugar-water-yeast. Seasonal population dynamics and sex ratios were summarized for berry, cherry, stone fruit, grape, non-crop host plants, non-host sites, and for conventional IPM, certified organic, backyard, and feral sites, by region and year. Overwintering was detected in all regions and years, despite winter temperatures below -17°C. A spatial analysis was conducted using a Geographic Information System (GIS), daily weather data, geomorphometric measures of terrain, distance to water, and other variables, at each site. Overwintering success at a site, measured as Julian week of first capture of D. suzukii, was significantly related (R2 = 0.49) in cherry habitats to year, agronomic treatment, and number of winter days...
Http Dx Doi Org 10 1080 03610928908830106, Jun 27, 2007
ABSTRACT Modified maximum likelihood estimators of the parameters of a bivariate normal distribut... more ABSTRACT Modified maximum likelihood estimators of the parameters of a bivariate normal distribution are developed when the smallest and largest observations on one of the two components are censored. These estimators are shown to be unbiased and efficient for large n. For testing the null hypothesis statistic is defined.
This article considers three practical hypotheses involving the equicorrelation matrix for groupe... more This article considers three practical hypotheses involving the equicorrelation matrix for grouped normal data. We obtain statistics and computing formulae for common test procedures such as the score test and the likelihood ratio test. In addition, statistics and computing formulae are obtained for various small sample procedures as proposed in Skovgaard (2001). The properties of the tests for each of the three hypotheses are compared using Monte Carlo simulations.
This paper describes robust procedures for estimating parameters of a mixed effects linear model ... more This paper describes robust procedures for estimating parameters of a mixed effects linear model as applied to longitudinal data. In addition to fixed regression parameters, the model incorporates random subject effects to accommodate between-subjects variability and autocorrelation for within-subject variability. Robust empirical Bayesian estimation of subject effects is briefly discussed. As an illustration, the procedures are applied to data from a multiple sclerosis clinical trial.
Abstract: A great part of King Alfred's renown comes from his translations of Latin writings... more Abstract: A great part of King Alfred's renown comes from his translations of Latin writings into Old English. The group of translations that he gets credit for, however, has changed over the years. Presently four translations are attributed to him: the Pastoral Care, the Boethius, ...
ABSTRACT Modified maximum likelihood estimators of the parameters of a multivariate normal distri... more ABSTRACT Modified maximum likelihood estimators of the parameters of a multivariate normal distribution are developed when the smallest or largest observations on one of the components are censored. These estimators are used to construct tests for means and correlation coefficients. The robustness of these tests to deviations from normality is investigated.
ABSTRACT In this note initial block technique has been used for construction of some classes of 3... more ABSTRACT In this note initial block technique has been used for construction of some classes of 3-associate PBIB designs, known as rectangular designs.
Communications in Statistics - Theory and Methods, 1985
ABSTRACT Optimality of experimental designs for spatially correlated observations is investigated... more ABSTRACT Optimality of experimental designs for spatially correlated observations is investigated.come two dimensional correlation structures are discussed and an attempt has been made to find optimal or nearly optimal design for each sitution.The solution lend to designs similar to that used for repeated measurements.The relative efficiency of the proposed designs in comparison to randomized latin square designs is tabulated for some cases.
Uploads
Papers