limitation—no spatial information is taken into account. This causes the FM model to work only on well-defined images with low levels of noise; unfortunately, this is often not the the case due to artifacts such as partial volume effect and bias field distortion. Under these conditions, FM model

... In this paper we present two general types of Gibbs samplers that can be used to fit posteriors of Bayesian hierarchical models based on stick-breaking priors. The first type of Gibbs sampler, referred to as a Polya urn Gibbs sampler, is a generalized version of a widely used Gibbs sampling

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for the third. Building on prior work for algorithmic acceleration that is not based on approximation, we introduce a new algorithm that efficiently, searches the space of cluster locations and number of clusters to optimize the Bayesian Information Criterion (BIC) or the Akaike Information Criterion (AIC

Ego-motion estimation for an agile single camera moving through general, unknown scenes becomes a much more challenging problem when real-time performance is required rather than under the off-line processing conditions under which most successful structure from motion work has been achieved

The problem of space-time cluster detection arises in a variety of applications, including disease surveillance and brain imaging. In this work, we briefly review the state of the art in space-time cluster detection, focusing on space-time scan statistics, and we derive a number of new statistics

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commonfactor,apprehensionaboutinterpersonalencounters.Employinga revisedmeasureof apprehension,factoranalysisof responsesof 160maleand 144femaleundergraduatesto thesetwo scalesyieldedfive factors:apprehen-sion aboutcommunicatingin groupsand meetings,apprehensionin inter-personalcontexts,apprehensionin public speakingcontexts,preventingothers fromtakingadvantage,andcontentiousness.Only onecommonfactor,appre-hensionin interpersonalcontexts,wassharedby itemsfrom both scales. Assertivenessrefersto the abilityto makerequests,activelydisagree; expresspersonalrightsandfeelings;initiate,maintain,or disengagefromcon-versations;andto standup for self (3, 6, 17, 19). Attemptsto increase assertivenesshavetypicallyfocusedon shapingboth verbaland nonverbal commu:1ication(1, 2), or alteringmaladaptiveanxietyresponsesin inter-personalconversations(14,21). As such,"Asserrivenessi definedin terms ofcommunication,andthemeasuremenrof assertivenessrelieson communica-tionbehaviors"(15,p. 491). Conceptuallysimilar,apprehensionaboutcorn-

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We address the problem of distributed source coding, i.e. compression of correlated sources that are not co-located and/or cannot communicate with each other to minimize their joint description cost. In this work we tackle the related problem of compressing a source that is correlated