Looking for Patterns in Content: From Design to End-Users Consumption.
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1 Looking for Patterns in Content: From Design to End-Users Consumption. Panel discussion, CONTENT 2011, Rome, Italy. Hans-Werner Sehring, T-Systems Multimedia Solutions GmbH.
2 Patterns for and in Content? In content management patterns can be applied at all layers. Software. Models. Content model. Navigation model. Context model. Content. Here: patterns for content. For content analysis / schema derivation. For content structures. For content representation. Panel on Patterns in Content / Dr. H.-W. Sehring 29 Sep
3 On the Notion of Pattern. What is a pattern in the first place? Two ways to look at them: Predefined abstract solutions to recurring problems; in the sense of Alexander. Recurring structures observed in objects; in the sense of pattern matching approaches. What does it mean for content management? According to the two views from above: Definition of patterns for typical cases of content utilization. Detection of patterns while analyzing content for, e.g., model building and content syndication. Panel on Patterns in Content / Dr. H.-W. Sehring 29 Sep
4 Patterns for Content Analysis. Example: The Asset Schema Inference Process (ASIP). The ASIP has four phases: Phase 1 Sample acquisition Phase 2 answer questions Phase 3 Schema inference Feedback questions Prototype generation unhappy with schema: modify samples (n modify schema) Phase 4 System generation Panel on Patterns in Content / Dr. H.-W. Sehring 29 Sep
5 Patterns for Content Analysis (cont d). Two Schema Inference Experiments. Experiments with alternatives for phases 2 and 3: (Traditional) schema inference plus user feedback. Straight-forward approach starting from singletons. Clustering, supervised by domain experts. Statistical approach, semi-supervised learning. Phase 3 (generation of questions to gather feedback) is determined by the alternative chosen. Result of phases 1-3 is a CCM model: Prototype generation and system generation (phase 4) are carried out by the CCM model compiler. The domain expert can modify the inferred schema (openness and dynamics). Panel on Patterns in Content / Dr. H.-W. Sehring 29 Sep
6 Patterns for Contextualized Content and Content Use. Patterns for typical content utilization. Currently there are no best practices for recurring problems. Example: I18n. Language-independent Content Default Language Content en/us Content de/de Content or ContentStructure entext : String detext : String ittext : String jptext : String numberformat : TextFormat There seems to be no pattern catalogue for these kinds of challenges. Pattern definitions could be a tool that helps designing content structures support typical problems in a more adequate way. Panel on Patterns in Content / Dr. H.-W. Sehring 29 Sep
7 Patterns for Content Representation. Computer science: Processing of symbols that represent entities (of the real world). Application areas: Abstraction level Symbols Processing Computing Data management Content / knowledge management Numerals with natural meaning (Domain) Data in standardized form Multimedia content and subject structures relevant for a specific domain Evaluation of expressions Standardization, Maintenance, Communication Context-dependent descriptions and communication? Typical approach: Reduction on lower level. Panel on Patterns in Content / Dr. H.-W. Sehring 29 Sep
8 Thank you. Let s discuss. Panel on Patterns in Content / Dr. H.-W. Sehring 29 Sep
9 Building Software Applications from Software Architectural Patterns Hassan Gomaa Dept. of Computer Science George Mason University Fairfax, Virginia, USA PANEL Third International Conferences on Pervasive Patterns and Applications (PATTERNS 2011) Rome, Italy September 29, 2011 Copyright 2011 Hassan Gomaa
10 Software Architectural Patterns Software Architectural Patterns [Buschmann, Shaw] Copyright 2011 H. Gomaa Recurring architectures used in various software applications Goal: Design Software Architecture from Software Architectural Patterns Architectural Structure Patterns Address structure of major subsystems Architectural Communication Patterns Reusable interaction sequences between components H. Gomaa, Software Modeling and Design: UML, Use Cases, Patterns, and Software Architectures, Cambridge University Press,
11 Architectural Structure Patterns Layered patterns Layers of Abstraction Client/Service patterns Multiple Client / Single Service Multiple Client / Multiple Service Multi-tier Client / Service Control Patterns Centralized Control Distributed Control Hierarchical Control Multiple Client / Single Service pattern Copyright 2011 H. Gomaa 3
12 Architectural Communication Patterns Asynchronous communication patterns Synchronous communication patterns Broker Communication Patterns Broker forwarding Broker handle Discovery Group Communication Patterns Broadcast Subscription/notification Broker and group communication patterns Facilitate software evolution and adaptation Copyright 2011 H. Gomaa 4
13 Subscription/Notification Pattern Subscription/Notification Pattern - Client subscribes to join group - Receives messages sent to all members of group Copyright 2011 H. Gomaa 5
14 Building Software Applications from Software Architectural Patterns Consider architectural structure patterns Different patterns can be combined Start with layers of abstractions pattern Incorporate client/service patterns Incorporate control patterns Apply architectural communication patterns Decouple sender components from receiver components Broker patterns Group communication patterns Copyright 2011 H. Gomaa 6
15 Building Emergency Monitoring System From Software Architectural Patterns «user interaction component» : OperatorInteraction Architectural Structure Patterns Layered pattern Client/Service pattern Distributed Control «data collection component» : EventMonitor event subscribe event Notification event sensor Input «control component» : Distributed Controller Architectural Communication Patterns actuator Output Synchronous Asynchronous Broker Subscription/Notification «service» : EventHandlingService «input component»» : SensorNode «output component» : ActuatorNode Copyright 2011 H. Gomaa 7
16 Conclusions Software architectural patterns help with Designing and implementing application software architecture Evolution and/or dynamic adaptation of software architecture and implementation Copyright 2011 H. Gomaa 8
17 Automatic extraction of (musical) metadata from audio signals: Successes, failures and challenges Wolfgang Fohl Dept.Computer Science Hamburg University of Applied Sciences Steinberg Media Technologies Panel: Looking for Patterns in Content: From Design to End-Users Consumption CONTENT , Rome, Italy Wolfgang Fohl Automatic Audio Metadata Extraction 1 / 4
18 Content = Signal + Metadata Applications and Uses Advanced music search Music production / mix / editing Generate playlists / DJ Recommend music Detect plagiarism / illegal downloads Wolfgang Fohl Automatic Audio Metadata Extraction 2 / 4
19 Metadata Examples Automatically Extractable Metadata? Speech / Music / Other Text Melody Single voice Multiple voices Rhythm bpm depending on genre Musical Genre / Instrument family, type, individual instrument Player / interpretation Stradivariness of a violin Wolfgang Fohl Automatic Audio Metadata Extraction 3 / 4
20 MPEG-7: Audio Framework Wolfgang Fohl Automatic Audio Metadata Extraction 4 / 4
21 Wheen Automatic Extraction Fails Inappropriate Context Information Proper information of musical context required Adequate size of Temporal context Not all context information present in signal Automatic music trancription Contemporary music Art: Destroy and Create Contexts Uncertainity about context: Essential element of contemporary art (at any time) Example: John Cage Wolfgang Fohl Automatic Audio Metadata Extraction 5 / 4
22 Panel Discussion: Looking for Patterns in Content PATTERNS 2011, September 29, 2011 Rome, Italy Reutlingen University Panel discussion Looking for Patterns in Content Fritz Laux Reutlingen University 1 /5 F. Laux
23 Panel Discussion: Looking for Patterns in Content Reutlingen University Patterns Overview quality patterns Doc Descriptor/ Meta-data a b x z X search patterns D2 text text text classification patterns D3 2 /5 F. Laux contextual patterns
24 Panel Discussion: Looking for Patterns in Content Reutlingen University Given text/document collection Search Quality Patterns How to ensure high recall and precision? Solution use ontology/thesaurus refine/broaden search check actuality rank results follow and analyse links (in case of web docs) 100% Recall increase quality 3 /5 F. Laux 0 Precision 100%
25 Panel Discussion: Looking for Patterns in Content Reutlingen University Classification Quality Patterns Given automated descriptor/classification How to ensure good descriptors/correct classification? Solution Descriptor derived from Structure (Title, Keywords, related work, bibliography) Descriptor derived from content (word frequency) use bibliographic Meta-data use Thesaurus, Ontology do sequential pattern analysis Frequency Zipf's law Selectivity good classifiers 4 /5 F. Laux 0 Rank
26 Panel Discussion: Looking for Patterns in Content Reutlingen University Document Quality Patterns Given text/document collection How to assess document quality? Criteria understandability, consistency actuality, accuracy structure author's expertise/reputation Frequency Text #1 Text #2 in literature: Q(#2) > Q(#1), and in science? 5 /5 F. Laux 0 Rank
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