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作者：Zanini, Paolo; Shen, Haipeng; Truong, Young
作者单位：Polytechnic University of Milan; University of Hong Kong; University of North Carolina; University of North Carolina Chapel Hill; University of North Carolina School of Medicine
摘要：We consider an urban planning application where Telecom Italia collected mobile-phone traffic data in the metropolitan area of Milan, Italy, aiming to retrieve meaningful information regarding working, residential, and mobility activities around the city. The independent component analysis (ICA) framework is used to model underlying spatial activities as spatial processes on a lattice independent of each other. To incorporate spatial dependence within the spatial sources, we develop a spatial ...
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作者：Ruddy, Sean; Johnson, Marla; Purdom, Elizabeth
作者单位：University of California System; University of California Berkeley; University of California System; University of California Berkeley
摘要：The prevalence of sequencing experiments in genomics has led to an increased use of methods for count data in analyzing high-throughput genomic data to perform analyses. The importance of shrinkage methods in improving the performance of statistical methods remains. A common example is gene expression data, where the counts per gene are often modeled as some form of an overdispersed Poisson. Shrinkage estimates of the per-gene dispersion parameter have led to improved estimation of dispersion,...
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作者：Ylitalo, Anna-Kaisa; Sarkka, Aila; Guttorp, Peter
作者单位：University of Jyvaskyla; University of Jyvaskyla; Chalmers University of Technology; University of Gothenburg; University of Washington; University of Washington Seattle
摘要：How do people look at art? Are there any differences between how experienced and inexperienced art viewers look at a painting? We approach these questions by analyzing and modeling eye movement data from a cognitive art research experiment, where the eye movements of twenty test subjects, ten experienced and ten inexperienced art viewers, were recorded while they were looking at paintings. Eye movements consist of stops of the gaze as well as jumps between the stops. Hence, the observed gaze s...
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作者：Ahn, Kwang Woo; Logan, Brent R.
作者单位：Medical College of Wisconsin
摘要：Quantile residual lifetime analysis is conducted to compare remaining lifetimes among groups for survival data. Evaluating residual lifetimes among groups after adjustment for covariates is often of interest. The current literature is limited to comparing two groups for independent data. We propose a pseudo-value approach to compare quantile residual lifetimes given covariates between multiple groups for independent and clustered survival data. The proposed method considers clustered event tim...
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作者：Jin, Ick Hoon; Yuan, Ying; Bandyopadhyay, Dipankar
作者单位：University of Notre Dame; University of Texas System; UTMD Anderson Cancer Center; Virginia Commonwealth University
摘要：Research in dental caries generates data with two levels of hierarchy: that of a tooth overall and that of the different surfaces of the tooth. The outcomes often exhibit spatial referencing among neighboring teeth and surfaces, that is, the disease status of a tooth or surface might be influenced by the status of a set of proximal teeth/surfaces. Assessments of dental caries (tooth decay) at the tooth level yield binary outcomes indicating the presence/absence of teeth, and trinary outcomes a...
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作者：Koepke, Amanda A.; Longini, Ira M., Jr.; Halloran, M. Elizabeth; Wakefield, Jon; Minin, Vladimir N.
作者单位：Fred Hutchinson Cancer Center; State University System of Florida; University of Florida; State University System of Florida; University of Florida; University of Washington; University of Washington Seattle; University of Washington; University of Washington Seattle; University of Washington; University of Washington Seattle
摘要：Despite seasonal cholera outbreaks in Bangladesh, little is known about the relationship between environmental conditions and cholera cases. We seek to develop a predictive model for cholera outbreaks in Bangladesh based on environmental predictors. To do this, we estimate the contribution of environmental variables, such as water depth and water temperature, to cholera outbreaks in the context of a disease transmission model. We implement a method which simultaneously accounts for disease dyn...
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作者：Hanks, Ephraim M. u; Hooten, Mevin B.; Knick, Steven T.; Oyler-McCance, Sara J.; Fike, Jennifer A.; Cross, Todd B.; Schwartz, Michael K.
作者单位：Pennsylvania Commonwealth System of Higher Education (PCSHE); Pennsylvania State University; Pennsylvania State University - University Park; United States Department of the Interior; United States Geological Survey; Colorado State University System; Colorado State University Fort Collins; United States Department of the Interior; United States Geological Survey; United States Department of the Interior; United States Geological Survey; United States Department of the Interior; United States Geological Survey; University of Montana System; University of Montana; United States Department of Agriculture (USDA); United States Forest Service
摘要：We propose a spatially-explicit approach for modeling genetic variation across space and illustrate how this approach can be used to optimize spatial prediction and sampling design for landscape genetic data. We propose a multinomial data model for categorical microsatellite allele data commonly used in landscape genetic studies, and introduce a latent spatial random effect to allow for spatial correlation between genetic observations. We illustrate how modern dimension reduction approaches to...
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作者：Bolsinova, Maria; Maris, Gunter; Hoijtink, Herbert
作者单位：Utrecht University; Utrecht University; University of Amsterdam
摘要：One of the important questions in the practice of educational testing is how a particular test should be scored. In this paper we consider what an appropriate simple scoring rule should be for the Dutch as a second language test consisting of listening and reading items. As in many other applications, here the Rasch model which allows to score the test with a simple sumscore is too restrictive to adequately represent the data. In this study we propose an exploratory algorithm which clusters th...
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作者：Gaetan, Carlo; Girardi, Paolo; Pastres, Roberto; Mangin, Antoine
作者单位：Universita Ca Foscari Venezia
摘要：The use of water quality indicators is of crucial importance to identify risks to the environment, society and human health. In particular, the Chlorophyll type A (Chl-a) is a shared indicator of trophic status and for monitoring activities it may be useful to discover local dangerous behaviours (for example, the anoxic events). In this paper we consider a comprehensive data set, covering the whole Adriatic Sea, derived from Ocean Colour satellite data, during the period 2002-2012, with the ai...
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作者：Zhang, Nancy R.; Yakir, Benjamin; Xia, Li C.; Siegmund, David
作者单位：University of Pennsylvania; Hebrew University of Jerusalem; Stanford University; Stanford University
摘要：The detection of local genomic signals using high-throughput DNA sequencing data can be cast as a problem of scanning a Poisson random field for local changes in the rate of the process. We propose a likelihood-based framework for such scans, and derive formulas for false positive rate control and power calculations. The framework can also accommodate modified processes that involve overdispersion. As a specific, detailed example, we consider the detection of insertions and deletions by paired...
