Now showing items 1-9 of 9

    • A compact energy-independent CZT-based gamma camera 

      Seo, Youngho; Cui, Yonggang; O'Connor, Paul; Huang, Qiu; James, Ralph B.; Mitra, Debasis; Pan, Hui (2017-08-09)
      Conventional gamma cameras are heavy and occupy large volume for all required hardware components. Direct-conversion solid-state detectors like cadmium zinc telluride (CZT) enable a compact design of gamma cameras. In ...
    • Correlogram method for comparing bio-sequences 

      Samant, Gandhali P.; Mitra, Debasis (2006-02-16)
      Sequence comparison is one of the most primitive operations used in bio-informatics. It is used as a basis for many other complex manipulations in the field of Computational Molecular Biology. Many methods and algorithms ...
    • Culprit detection on incremental tractable qualitative temporal reasoning problems 

      Launay, Florent Marie; Mitra, Debasis (2006-04-26)
      This thesis is a confluence of three problems in constraint reasoning: qualitative temporal reasoning (QTR), incremental reasoning, and explanation generation. We first address a set of algorithms to solve the QTR for point ...
    • A generalized framework for reasoning with angular directions 

      Mitra, Debasis (2001-11-03)
      This extended abstract presents a new scheme for qualitative reasoning with directions between points in 2D-space, called Star-ontology(6). The current results of our study on the complexity issues for reasoning with ...
    • MORPHEUS: motif oriented representations to purge hostile events from unlabeled sequences 

      Tandon, Gaurav; Mitra, Debasis; Chan, Philip K. (2004-06-07)
      Most of the prevalent anomaly detection systems use some training data to build models. These models are then utilized to capture any deviations resulting from possible intrusions. The efficacy of such systems is highly ...
    • An optimum greedy algorithm for choosing minimal set of conflicting constraints in the point sequencing problem 

      Launay, Florent; Mitra, Debasis (2002-12-02)
      In this work, we first have proposed a technique to define the "causes" of inconsistency on an online point based reasoning constraint network. Second, we introduce an algorithm that proposes the user a minimal set of ...
    • A representation scheme for finite length strings 

      Tandon, Gaurav; Mitra, Debasis (2003-04-01)
      This study is an attempt to create a canonical representation scheme for finite length strings to simplify the study of the theory behind different classes of patterns and to ease the understanding of the underlying ...
    • Resolution of inconsistent temporal constraints for intervals 

      Launay, Florent; Mitra, Debasis (2004-04-06)
      In this work, we first have proposed a technique to identify failure in point-based and interval-based temporal constraint reasoning. Then, while many past literature would stop searching once inconsistency is found, we ...
    • Studies with Dynamic Nuclear Imaging Image Reconstruction Algorithm 

      Chang, Haoran (2016-12)
      Non-negative matrix factorization (NMF) is a useful method for those non-negative multivariate data. In nuclear imaging, NMF, which is also called factor analysis, is used to analyze the 4D image of positron emission ...