165,905 Works

Implementation and Perceptual Evaluation of a Simulation Method for Coupled Rooms in Higher Order Ambisonics

Giso Grimm, Torben Wendt, Volker Hohmann & Stephan D Ewert
A fast and perceptively plausible method for rendering acoustic scenarios with moving sources and moving listeners is presented. The method is principally suited for application in dynamic and interactive evaluation environments (e.g., for hearing aid development), psycho-physics with adaptively changing the spatial configuration, or simulation and computer games. The simulation distinguishes between the direct sound, sound reflected and diffracted by objects of limited size, diffuse sound surrounding the listener, e.g., diffuse background sounds and diffuse...

Interactive Acoustic Virtual Environments Using Distributed Room Acoustic Simulations

Frank Wefers, Jonas Stienen, Sönke Pelzer & Michael Vorländer
This publication presents how the computational resources of PC clusters can be used to realize low-latency room acoustic simulations for comprehensive virtual scenes. A benefit is not only to realize more complex scenes (including a multitude of sound sources, acoustically coupled-rooms with sound transmission), but also to minimize the system response times for prototyping applications (e.g. interactive change of materials or geometry) in simpler applications. PC clusters prove to be a suitable platform for room...

Perceptual and Room Acoustical Evaluation of a Computational Efficient Binaural Room Impulse Response Simulation Method

Torben Wendt, Steven Van De Par & Stephan D Ewert
A fast and perceptively plausible method for synthesizing binaural room impulse responses (BRIR) is presented. The method is principally suited for application in dynamic and interactive evaluation environments (e. g., for hearing aid development), psychophysics with adaptively changing room reverberation, or simulation and computer games. In order to achieve a low computational cost, the proposed method is based on a hybrid approach. Using the image source model (ISM; Allen and Berkley [J.Acoust. Soc. Am. Vol....

Exploration of a Biologically Inspired Model for Sound Source Localization In 3D Space

Symeon Mattes, Philip Nelson, Filippo Fazi & Michael Capp
Sound localization in 3D space relies on a variety of auditory cues resulting from the encoding provided by the lower and higher regions of the auditory path. During the last 50 years different theories and models have been developed to describe psychoacoustic phenomena in sound localization inspired by the processing that is undertaken in the human auditory system. In this paper, a biologically inspired model of human sound localization is described and the encoding of...

The Impact of the White Noise Gain (WNG) of a Virtual Artificial Head on the Appraisal of Binaural Sound Reproduction

Eugen Rasumow, Matthias Blau, Martin Hansen, Simon Doclo, Steven Van De Par, Volker Mellert & Dirk Püschel
As an individualized alternative to traditional artificial heads, individual head-related transfer functions (HRTFs) can be synthesized with a microphone array and digital filtering. This strategy is referred to as "virtual artificial head" (VAH). The VAH filter coefficients are calculated by incorporating regularization to account for small errors in the characteristics and/or the position of the microphones. A common way to increase robustness is to impose a socalled white noise gain (WNG) constraint. The higher the...

Survey Musik und Medien 2012: Audiomediennutzung in Deutschland - Audioemitter - Genutzte Audioemitter 2012 - Vielseitig-Audiophile

Steffen Lepa
Wo kam 2012 die Musik heraus? Mit Audioemittern sind jene technischen Objekte gemeint, die mit Audiogeräten verbunden werden, um Audioquellen hörbar zu machen. Dazu gehören Kopfhörer und Lautsprechersysteme mit verschiedenen Wiedergabeformaten (mono, stereo, surround) und in unterschiedlichen Varianten (In-Ear-Kopfhörer, großer Hifi-Kopfhörer, integrierte Lautsprecher, Dockingstation etc..). Die Vielseitig-Audiophilen, welche typischerweise zwischen 1970 und 1992 geboren und mit 10,1 % das am wenigsten verbreitete Nutzungsmuster sind, bedienen sich nicht nur aus dem breitesten Repertoire an Audiomedien zur...

Survey Musik und Medien 2012: Audiomediennutzung in Deutschland - Audioemitter - Genutzte Audioemitter 2012 - Vielseitige Traditionalisten

Steffen Lepa
Wo kam 2012 die Musik heraus? Mit Audioemittern sind jene technischen Objekte gemeint, die mit Audiogeräten verbunden werden, um Audioquellen hörbar zu machen. Dazu gehören Kopfhörer und Lautsprechersysteme mit verschiedenen Wiedergabeformaten (mono, stereo, surround) und in unterschiedlichen Varianten (In-Ear-Kopfhörer, großer Hifi-Kopfhörer, integrierte Lautsprecher, Dockingstation etc..). Das in Deutschland mit 25,6 % am weitesten verbreitete Audiorepertoire sind die Vielseitigen Traditionalisten. Bei seinen zumeist zwischen 1944 bis 1964 geborenen Vertretern erfreut sich das Radio der größten Beliebtheit....

Survey Musik und Medien 2012: Audiomediennutzung in Deutschland - Audiogeräte - Genutzte Audiogeräte 2012 - Vielseitige Traditionalisten

Steffen Lepa
Womit wurde in 2012 Musik wiedergegeben? Mit Audiogeräten sind technische Geräte gemeint, die den Zugriff auf und die Wiedergabe von Audioquellen ermöglichen. Dazu gehören CD-Player, Plattenspieler, Kassettenrecorder, MP3-Player und Smartphones, aber auch der Computer und unterschiedliche multimediale Entertainmentgeräte, welche auch zur Musikrezeption genutzt werden können. Das in Deutschland mit 25,6 % am weitesten verbreitete Audiorepertoire sind die Vielseitigen Traditionalisten. Bei seinen zumeist zwischen 1944 bis 1964 geborenen Vertretern erfreut sich das Radio der größten Beliebtheit....

Survey Musik und Medien 2012: Audiomediennutzung in Deutschland - Audioquellen - Genutzte Audioquellen 2012 - Vielseitige Traditionalisten

Steffen Lepa
Wo kam die Musik 2012 im Alltag her? Mit Audioquellen sind Distributionswege gemeint, über die Musik erworben, archiviert und verfügbar gemacht werden kann. Dazu gehören physische Tonträger (CD, LP, MC etc.), elektronische Dienste für den Download oder das Streaming von digitalen Musikinhalten (iTunes, last.fm, Spotify etc.), aber auch der rundfunkbasierte Radioempfang und schließlich Musikangebote auf Webseiten oder digitalen Datenträgern. Das in Deutschland mit 25,6 % am weitesten verbreitete Audiorepertoire sind die Vielseitigen Traditionalisten. Bei seinen...

Survey Musik und Medien 2012: Audio Media Usage in Germany - Audio Emitters - Audio Emitters used in 2012 - Digital Mobilists

Steffen Lepa
Where did the sound emanate from in 2012? Audio Emitters comprise those technical objects that are connected to Audio Devices in order to make Audio Sources audible. This category includes headphones and loudspeakers with both diverse sound formats (mono, stereo, surround) as well as various device types (Headphones: small, standard, HiFi; Loudspeakers: integrated models, single components and docking stations). Typically born between 1979 and 1998, the Digital Mobilists constitute the youngest user type and comprise...

Survey Musik und Medien 2012: Audiomediennutzung in Deutschland - Klassenzugehörigkeit nach Geburtsjahrgang

Steffen Lepa
Audiorepertoires sind weit verbreitete Muster des Gebrauchs von Audiotechnologien zum Musikhören im Alltag, die sich auch als “Nutzertypen” interpretieren lassen. Sie wurden im Survey Musik und Medien 2012 auf Basis der deutschlandweit erhobenen repräsentativen Audiomediennutzungsdaten gebildet. Menschen hören ihre Musik heute mit ganz unterschiedlichen Geräten, Infrastrukturen und Technologien und kombinieren die unterschiedlichen Möglichkeiten im Alltag oft auch miteinander. Daher ist es sinnvoll, die alltägliche Audiomediennutzung als komplexe Verknüpfung unterschiedlicher Medientechnologien auszuwerten und zu interpretieren –...

Survey Musik und Medien 2012: Audio Media Usage in Germany - Audio Repertoires by birth cohorts

Steffen Lepa
Audio Repertoires are widespread patterns regarding the use of audiotechnologies in everyday life which may also be interpreted as “user types”. They were identified in Survey Musik und Medien 2012 based on the nationwide collected representative Audio Usage Data. Nowadays, people listen to music by means of various different devices, infrastructures and technologies. Furthermore, people often tend to combine those options within their daily routines. Therefore, it is reasonable to analyze and interpret everyday Audio...

Survey Musik und Medien 2012: Audio Media Usage in Germany - Audio Devices - Audio Devices used in 2012

Steffen Lepa
By what means was music played back in 2012? Audio Devices comprise technical devices that permit access to and enable playback of Audio Sources. This includes CD players, record players, cassette recorders, MP3 player and smartphones but also computers and various multimedia entertainment devices that allow music use.

Survey Musik und Medien 2012: Audio Media Usage in Germany - Audio Devices - Audio Devices used in 2012 - Selective Traditionalists

Steffen Lepa
By what means was music played back in 2012? Audio Devices comprise technical devices that permit access to and enable playback of Audio Sources. This includes CD players, record players, cassette recorders, MP3 player and smartphones but also computers and various multimedia entertainment devices that allow music use. 11,6 % of our participants may be described as Selective Traditionalists who are typically born between 1955 and 1975. The radio is the dominant audio source used...

Survey Musik und Medien 2012: Audio Media Usage in Germany - Audio Emitters - Audio Emitters used in 2012 - Radio Traditionalists

Steffen Lepa
Where did the sound emanate from in 2012? Audio Emitters comprise those technical objects that are connected to Audio Devices in order to make Audio Sources audible. This category includes headphones and loudspeakers with both diverse sound formats (mono, stereo, surround) as well as various device types (Headphones: small, standard, HiFi; Loudspeakers: integrated models, single components and docking stations). Radio Traditionalists are represented in various age groups, and may be born in 1920 as well...

Investigation of Fluidic Devices for Mixing Enhancement for the Shockless Explosion Combustion Process

Bernhard Bobusch, Phillip Berndt, Christian Oliver Paschereit & Rupert Klein
Fuel-air mixing is a crucial process in low emission combustion systems. A higher mixing quality leads to lower emissions and higher combustion efficiencies. Especially for the innovative constant volume combustion processes "Shockless Explosion Combustion" (SEC) the mixing of fuel and air is an important parameter, since the whole combustion process is triggered and controlled via the equivalence ratio. To enhance the passive scalar mixing, fluidic oscillators are investigated and compared to the standard jet in...

Electronic Communications of the EASST, Volume 65: Software Quality and Maintainability 2014

Preface of SQM 2014 Proceedings - 8th International Workshop on Software Quality and Maintainability The Implementation of the CHA-Q Meta-Model: A Comprehensive, Change-Centric Software Representation Software Language Engineering by Intentional Rewriting A Model-Based Approach to Impact Analysis Using Model Differencing Comparing communication and development networks for predicting file change proneness: An exploratory study considering process and social metrics An Initial Quality Analysis of the Ohloh Software Evolution Data Implementing a model-driven and iterative quality assessment...

Electronic Communications of the EASST, Volume 62: Specification, Transformation, Navigation - Special Issue Dedicated to Bernd Krieg-Brückner

The VSE Refinement Method in Hets Enhanced Formal Verification Flow for Circuits Integrating Debugging and Coverage Analysis Graph Tuple Transformation (A) Vision for 2050 - Context-Based Image Understanding for a Human-Robot Soccer Match Spreadsheets with a Semantic Layer On the whereabouts of CSP-CASL – A survey Preface

Electronic Communications of the EASST, Volume 55: Programming and Computer Languages 2012

Tabling with Support for Relational Features in a Deductive Database String-based Multi-adjoint Lattices for Tracing Fuzzy Logic Computations Preface of Prole 2012 Test-Case Generation for SQL Nested Queries with Existential Conditions

Electronic Communications of the EASST, Volume 51: Petri Nets, Graph Transformation and other Concurrency Formalisms 2012

Optimization in Graph Transformation Systems with Time Using Petri Net Based Techniques Transfer of Local Confluence and Termination between Petri Net and Graph Transformation Systems Based on M-Functors Process Evolution based on Transformation of Algebraic High-Level Nets with Applications to Communication Platforms Abstract Interleaving Semantics for Reconfigurable Petri Nets Conditions in Reactive Systems and in Graph Rewriting On Modelling Communication in Ubiquitous Computing Systems using Algebraic Higher Order Nets Preface

Electronic Communications of the EASST, Volume 48: Foundations and Techniques for Open Source Software Certification 2011

A Formal Specification of the DNSSEC Model Formal verification of a theory of packages The Role of Best Practices to Appraise Open Source Software Analysis of Collaboration Effectiveness and Individuals’ Contribution in FLOSS Communities Using antipatterns to improve the quality of FLOSS development Learning and Activity Patterns in OSS Communities and their Impact on Software Quality Preface Quality, Success, Communication and Contribution in Open Source Software Process Scenarios in Open Source Software Certification

Electronic Communications of the EASST, Volume 45: Formal Methods for Interactive Systems 2011

Supporting Mobile Application Development with Model-Driven Emulation Modelling and analysing the interactive behaviour of an infusion pump Dependable keyed data entry for interactive systems Modelling Distributed Cognition Systems in PVS On formalising interactive number entry on infusion pumps Abstract Models and Cognitive Mismatch in Formal Verification Capturing the distinction between task and device errors in a formal model of user behaviour Closure and Attention Activation in Human Automatic Behaviour: A Framework for the Formal Analysis...

Electronic Communications of the EASST, Volume 41: Graph Transformation and Visual Modeling Techniques 2011

Distributed Port Automata Exploring (Meta-)Model Snapshots by Combining Visual and Textual Techniques A visual language for temporal specifications based on Spider diagrams Decidability and Expressiveness of Finitely Representable Recognizable Graph Languages Propagation of Constraints along Model Transformations Based on Triple Graph Grammars Categorical Abstract Rewriting Systems and Functoriality of Graph Transformation Towards a Maude Tool for Model Checking Temporal Graph Properties Treewidth, Pathwidth and Cospan Decompositions Automated Model Synchronization: A Case Study on UML with...

Electronic Communications of the EASST, Volume 40: Petri Nets and Graph Transformations 2010

Towards Guided Trajectory Exploration of Graph Transformation Systems RONs Revisited: General Approach to Model Reconfigurable Object Nets based on Algebraic High-Level Nets Formal Relationship between Petri Net and Graph Transformation Systems based on Functors between M-adhesive Categories Formalization of Petri Nets with Individual Tokens as Basis for DPO Net Transformations Modelling Emergency Scenarios using Algebraic High Level Net Transformation Systems with Net Patterns Functorial Analysis of Algebraic Higher-Order Net Systems with Applications to Mobile Ad-Hoc...

Electronic Communications of the EASST, Volume 27: Selbstorganisierende, adaptive, kontextsensitive verteilte Systeme 2010

A Middleware for Self-Organising Distributed Ambient Assisted Living Applications Nutzerintegration in die Anforderungserhebung für Ubiquitous Computing Systeme Evaluation of the Technology Agnostic Service Creation Approach Building an Infrastructure Level Context Model in Ambient Assisted Living QoS-based Self-Management for Business Processes Modeling of Self-Organizing Systems: An Overview Systemic Modeling of Agent Coaction: A Catalog of Decentralized Coordinating Processes Self Organized Swarms for cluster preserving Projections of high-dimensional Data Assessment – Ein Ansatz zur Evaluierung selbstorganisierender Systeme...

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