logging in or signing up overview6 hooks Nathaniel Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINTLite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: Embed: Flash iPad Copy Does not support media & animations WordPress Embed Customize Embed URL: Copy Thumbnail: Copy The presentation is successfully added In Your Favorites. Views: 102 Category: Science & Tech.. License: All Rights Reserved Like it (0) Dislike it (0) Added: May 07, 2008 This Presentation is Public Favorites: 0 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript Slide1: Shooting only Bangor Bioinformatics Mark A. Hooks School of Biological SciencesSlide2: Bioinformatic Interests Zoological/Ecological Tree-fitting Population Structure Analysis Genomics/Post-genomics Genotyping ‘omics’ Health Clinical Image analysis Bioengineering Image analysisSlide3: The SBS Post-Genomics Platform Suite of instrumentation to facilitate investigations of gene function. Capabilities: Transcript profiling through arrays Metabolite profiling by mass spec. Protein profiling by 2D gels and mass spec.Slide4: Metabolomics Proteomics Detection limit = 10-18 moles Mass accuracy < 1 PPM error Bruker Reflex IV MALDI-ToF MS Bruker Apex IV FTICRMS Automated Spot Picking ProEXPRESS Proteomic Imaging System Arthur Multiwavelength fluorescent scanner Investigor ProPic Peptide analysis Transcriptomics Liquid handling & spotting Slide Scanning (Affymetrix 428) Image processing - Imagene Data Analysis - GenesightSlide5: Functional Genomics Investigating relationships between metabolite and transcript levels Gene function Delineating functional pathways How do metabolites influence gene expression? What metabolites influence gene expression? Stress or developmental transitions Global regulatorsSlide6: If a gene is responsive to a metabolite, then it’s expression will change in relation to that metabolite’s concentration. If a metabolite induces expression there will be a positive correlation coefficient for transcript level vs metabolite level and visa versa. Metabolite Transcript Slide7: Resolve through mutant analysis Potential metabolic signal Explore mechanism Slide8: Grouping metabolites within interacting units Basic visual analysis - Clustered Image Maps Metabolites (clustered)Slide9: Slightly more complex system Gene Metabolite Protein Slide10: Classifiers Control Mutant Unsupervised Supervised Feature(s) DiscriminateSlide11: Combining classifiers Classifier ensembles linear quadratic neural networks Parzen logistic support vector machines fuzzy…………… naïve Bayes decision tree nearest neighbour histogram-based Dr. Ludmila Kuncheva (School of Informatics)Slide12: Combiner The input vector The output label Classifier Classifier Classifier . . . x Combining classifiers:Slide13: Methods for building classifier ensembles 1. Optimize the combiner 3. Try different classifier models e.g., decision trees, neural networks, nearest neighbor, etc. 4. Train each classifier on different subset of features 5. Alter the training data: sample from the whole data set, inject noise (bagging, boosting, random forests) Classifier . . . x 2. Use error-correcting output codes (ECOC) Classifier CombinerSlide14: Scientific visualization School of Informatics Prof. Nigel W. John Dr. Thomas Varsamidis Dr. Ik Soo Lim Medical Imaging Biogeometry Human - Computer interfacingSlide15: A Biomedical Knowledge Grid: Towards an Architecture for Data Mining and Knowledge Discovery for Biomedical Resources in a Grid Bill Teahan firstname.lastname@example.org Artificial Intellegence Group Alex Colquhoun HGMD Research group (Cardiff University) Seamless integration of geographically distributed information resourcesSlide16: Professor Ron Pethig (Aura BioSystems Inc.) Dr. Julian Burt Laboratory on a chip technology Dielectrophoresis for non-invasive cell characterisation of cell properties You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.