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Displaying 1-50 out of 173 total
Design by Units: Abstractions for Human and Compute Resources for Elastic Systems
Found in: IEEE Internet Computing
By Stefan Tai,Philipp Leitner,Schahram Dustdar
Issue Date:July 2012
pp. 84-88
Units make the usage and properties of diverse resources, including infrastructure and human resources, explicit early in system design, and allow for reasoning about complex system qualities, such as elasticity. They advance the measurability and manageme...
Flexible Social Workflows: Collaborations as Human Architecture
Found in: IEEE Internet Computing
By Christoph Dorn,Richard N. Taylor,Schahram Dustdar
Issue Date:March 2012
pp. 72-77
Human process involvement has gained momentum in recent years, but the proposed mechanisms can't efficiently adapt Web-scale collaborative workflows. Here, the authors describe collaborative problem solving and its integration with process-support systems ...
Process Mining Put into Context
Found in: IEEE Internet Computing
By Wil M.P. van der Aalst,Schahram Dustdar
Issue Date:January 2012
pp. 82-86
Process mining techniques help organizations discover and analyze business processes based on raw event data. The recently released
Principles of Elastic Processes
Found in: IEEE Internet Computing
By Schahram Dustdar,Yike Guo,Benjamin Satzger,Hong-Linh Truong
Issue Date:September 2011
pp. 66-71
Cloud computing's success has made on-demand computing with a pay-as-you-go pricing model popular. However, cloud computing's focus on resources and costs limits progress in realizing more flexible, adaptive processes. The authors introduce elastic process...
The Social Routing Principle
Found in: IEEE Internet Computing
By Schahram Dustdar, Martin Gaedke
Issue Date:July 2011
pp. 80-83
<p>This article discusses how modern Web-scale workflows can be built using a novel building block to be integrated into social networks as well as apps. This social routing principle fosters the integration of social networking systems and mobile ap...
The Social Compute Unit
Found in: IEEE Internet Computing
By Schahram Dustdar, Kamal Bhattacharya
Issue Date:May 2011
pp. 64-69
<p>Social computing is perceived mainly as a vehicle for establishing and maintaining private relationships and thus lacks mainstream adoption in enterprises. Collaborative computing, however, is firmly established, but no tight integration of the tw...
Principles of engineering service oriented systems
Found in: International Conference on Software Engineering Companion
By Elisabetta Di Nitto, Schahram Dustdar
Issue Date:May 2009
pp. 461-462
The objective of this workshop is to discuss about the importance of software engineering methods and techniques for service-oriented systems and, vice versa, about the impact that such kinds of open and natually adaptable systems can have on traditional s...
A Framework and Middleware for Application-Level Cloud Bursting on Top of Infrastructure-as-a-Service Clouds
Found in: 2013 IEEE/ACM 6th International Conference on Utility and Cloud Computing (UCC)
By Philipp Leitner,Zabolotnyi Rostyslav,Alessio Gambi,Schahram Dustdar
Issue Date:December 2013
pp. 163-170
A core idea of cloud computing is elasticity, i.e., enabling applications to adapt to varying load by dynamically acquiring and releasing cloud resources. One concrete realization is cloud bursting, which is the migration of applications or parts of applic...
MELA: Monitoring and Analyzing Elasticity of Cloud Services
Found in: 2013 IEEE 5th International Conference on Cloud Computing Technology and Science (CloudCom)
By Daniel Moldovan,Georgiana Copil,Hong-Linh Truong,Schahram Dustdar
Issue Date:December 2013
pp. 80-87
Cloud computing has enabled a wide array of applications to be exposed as elastic cloud services. While the number of such services has rapidly increased, there is a lack of techniques for supporting cross-layered multi-level monitoring and analysis of ela...
PatRICIA -- A Novel Programming Model for IoT Applications on Cloud Platforms
Found in: 2013 IEEE 6th International Conference on Service-Oriented Computing and Applications (SOCA)
By Stefan Nastic,Sanjin Sehic,Michael Vogler,Hong-Linh Truong,Schahram Dustdar
Issue Date:December 2013
pp. 53-60
Cloud computing technologies have recently been intensively exploited for the development and management of large-scale IoT systems, due to their capability to integrate diverse types of IoT devices and to support big IoT data analytics in an elastic manne...
Towards Automated IoT Application Deployment by a Cloud-Based Approach
Found in: 2013 IEEE 6th International Conference on Service-Oriented Computing and Applications (SOCA)
By Fei Li,Michael Vogler,Markus Claessens,Schahram Dustdar
Issue Date:December 2013
pp. 61-68
Internet of Things solutions are typically domain-specific, relying on heterogeneous hardware, communication protocols and data models. In such system environments, the deployment of IoT applications is very intricate. The application environments differ f...
Workflow Scheduling and Resource Allocation for Cloud-Based Execution of Elastic Processes
Found in: 2013 IEEE 6th International Conference on Service-Oriented Computing and Applications (SOCA)
By Philipp Hoenisch,Stefan Schulte,Schahram Dustdar
Issue Date:December 2013
pp. 1-8
Today's extensive business process landscapes make it necessary to handle the execution of a large number of workflows. Especially if workflow steps require the invocation of resource-intensive applications or a large number of applications needs to be car...
Multi-perspective Process Variability: A Case for Smart Green Buildings (Short Paper)
Found in: 2013 IEEE 6th International Conference on Service-Oriented Computing and Applications (SOCA)
By Aitor Murguzur,Hong-Linh Truong,Schahram Dustdar
Issue Date:December 2013
pp. 25-29
The variability scale in large-scale Cyber-Physical Systems (CPSs) is high and complex due to the voluminous ness, dynamicity and diversity of available computing resources (people, things and software services), domain-specific processes, domain-specific ...
Testing Elastic Computing Systems
Found in: IEEE Internet Computing
By Alessio Gambi,Waldemar Hummer,Hong-Linh Truong,Schahram Dustdar
Issue Date:November 2013
pp. 76-82
Elastic computing systems are a new breed of software system that arose with cloud computing and continue to gain increasing attention and adoption. They stretch and contract in response to external stimuli, such as the input workload, aiming to balance re...
A Fresh Look at Modeling Distributed Reactive Systems
Found in: 2013 International Conference on Cloud and Green Computing (CGC)
By Roland Moser,Schahram Dustdar,Johannes Gutleber,Luciano Orsini
Issue Date:September 2013
pp. 494-501
Scalable, distributed reactive systems require a scalable control infrastructure. Being able to model such an infrastructure is a prerequisite for putting it into place. In current systems, finite state machine based approaches are prevailing. They are, ho...
Social-Network-Sourced Big Data Analytics
Found in: IEEE Internet Computing
By Wei Tan,M. Brian Blake,Iman Saleh,Schahram Dustdar
Issue Date:September 2013
pp. 62-69
Very large datasets, also known as big data, originate from many domains, including healthcare, energy, weather, business, and social networks. Deriving knowledge is more difficult than ever when we must do it by intricately processing big data. Organizati...
Dynamic Collective Work [Guest editors' introduction]
Found in: IEEE Internet Computing
By Geetika T. Lakshmanan,Rania Khalaf,Schahram Dustdar
Issue Date:September 2013
pp. 6-9
The Internet's growth, and the proliferation of online collaboration tools and platforms and the federated systems that support them, have enabled ad hoc processes in which people interact in a dynamic collective way. Such activities are characterized by t...
Towards Living Inter-organizational Processes
Found in: 2013 IEEE 15th Conference on Business Informatics (CBI)
By Ruth Breu,Schahram Dustdar,Johann Eder,Christian Huemer,Gerti Kappel,Julius Kopke,Philip Langer,Jurgen Mangler,Jan Mendling,Gustaf Neumann,Stefanie Rinderle-Ma,Stefan Schulte,Stefan Sobernig,Barbara Weber
Issue Date:July 2013
pp. 363-366
Business Process Management (BPM) has gained significant adoption in practice for enabling organizations to increase their effectiveness, efficiency, and flexibility. This broad adoption has not only been fostered by a rich and well-established theory to m...
Web-Scale Service Delivery for Smart Cities
Found in: IEEE Internet Computing
By Fei Li,Michael Vogler,Sanjn Sehic,Soheil Qanbari,Stefan Nastic,Hong-Linh Truong,Schahram Dustdar
Issue Date:July 2013
pp. 78-83
Smart cities encompass services in diverse business and technological domains. Presently, most of these services are delivered through domain-specific, tightly coupled systems, which entail limited scalability and extensibility. The authors propose Web-sca...
Efficient and Scalable IoT Service Delivery on Cloud
Found in: 2013 IEEE 6th International Conference on Cloud Computing (CLOUD)
By Fei Li,Michael Voegler,Markus Claessens,Schahram Dustdar
Issue Date:June 2013
pp. 740-747
Nowadays, IoT services are typically delivered as physically isolated vertical solutions, in which all system components ranging from sensory devices to applications are customized and tightly coupled for the requirements of each specific project. The effi...
Self-Adaptive Resource Allocation for Elastic Process Execution
Found in: 2013 IEEE 6th International Conference on Cloud Computing (CLOUD)
By Philipp Hoenisch,Stefan Schulte,Schahram Dustdar,Srikumar Venugopal
Issue Date:June 2013
pp. 220-227
Especially in large companies, business process landscapes may be made up from thousands of different process definitions and instances. As a result, a Business Process Management System (BPMS) needs to be able to handle the concurrent execution of a very ...
Modeling Elasticity Trade-Offs in Adaptive Mixed Systems
Found in: 2013 IEEE 22nd International Workshop On Enabling Technologies: Infrastructure For Collaborative Enterprises (WETICE)
By Muhammad Z.C. Candra,Hong-Linh Truong,Schahram Dustdar
Issue Date:June 2013
pp. 21-26
In the past decade, elastic computing has emerged as a popular solution approach for on-demand computing resources' provisioning. Today, such dynamic resource provisioning is used not only in machine-based computing systems but also in mixed systems contai...
SYBL: An Extensible Language for Controlling Elasticity in Cloud Applications
Found in: 2013 13th IEEE/ACM International Symposium on Cluster, Cloud and Grid Computing (CCGrid)
By Georgiana Copil,Daniel Moldovan,Hong-Linh Truong,Schahram Dustdar
Issue Date:May 2013
pp. 112-119
Elasticity in cloud computing is a complex problem, regarding not only resource elasticity but also quality and cost elasticity, and most importantly, the relations among the three. Therefore, existing support for controlling elasticity in complex applicat...
Cost-Based Optimization of Service Compositions
Found in: IEEE Transactions on Services Computing
By Philipp Leitner,Waldemar Hummer,Schahram Dustdar
Issue Date:April 2013
pp. 239-251
For providers of composite services, preventing cases of SLA violations is crucial. Previous work has established runtime adaptation of compositions as a promising tool to achieve SLA conformance. However, to get a realistic and complete view of the decisi...
Fifty Shades of Grey in SOA Testing
Found in: 2013 IEEE 6th International Conference On Software Testing, Verification and Validation Workshops (ICSTW)
By Franz Wotawa,Marco Schulz,Ingo Pill,Seema Jehan,Philipp Leitner,Waldemar Hummer,Stefan Schulte,Philipp Hoenisch,Schahram Dustdar
Issue Date:March 2013
pp. 154-157
Testing is undisputedly a fundamental verification principle in the software landscape. Today's products require us to effectively handle and test huge, complex systems and in this context to tackle challenging traits like heterogeneity, distribution and c...
Winds of Change: From Vendor Lock-In to the Meta Cloud
Found in: IEEE Internet Computing
By Benjamin Satzger,Waldemar Hummer,Christian Inzinger,Philipp Leitner,Schahram Dustdar
Issue Date:January 2013
pp. 69-73
The emergence of yet more cloud offerings from a multitude of service providers calls for a meta cloud to smoothen the edges of the jagged cloud landscape. This meta cloud could solve the vendor lock-in problems that current public and hybrid cloud users f...
M2M Platform-as-a-Service for sustainability governance
Found in: 2012 5th IEEE International Conference on Service-Oriented Computing and Applications (SOCA)
By Hong-Linh Truong,Schahram Dustdar
Issue Date:December 2012
pp. 1-4
Recently, cloud computing technologies have been employed for large-scale machine-to-machine (M2M) systems, as they could potentially offer better solutions for managing monitoring data and analytics applications to support the needs of different consumers...
Application-level performance monitoring of cloud services based on the complex event processing paradigm
Found in: 2012 5th IEEE International Conference on Service-Oriented Computing and Applications (SOCA)
By Philipp Leitner,Christian Inzinger,Waldemar Hummer,Benjamin Satzger,Schahram Dustdar
Issue Date:December 2012
pp. 1-8
Monitoring of applications deployed to Infrastructure-as-a-Service clouds is still an open problem. In this paper, we discuss an approach based on the complex event processing paradigm, which allows application developers to specify and monitor high-level ...
Data Quality Observation in Pervasive Environments
Found in: 2012 IEEE 15th International Conference on Computational Science and Engineering (CSE)
By Fei Li,Stefan Nastic,Schahram Dustdar
Issue Date:December 2012
pp. 602-609
Pervasive applications are based on acquisition and consumption of real-time data from various environments. The quality of such data fluctuates constantly because of the dynamic nature of pervasive environments. Although data quality has notable impact on...
A programming model for context-aware applications in large-scale pervasive systems
Found in: 2012 IEEE 8th International Conference on Wireless and Mobile Computing, Networking and Communications (WiMob)
By Sanjin Sehic,Fei Li,Stefan Nastic,Schahram Dustdar
Issue Date:October 2012
pp. 142-149
In recent years, new business and research opportunities have been increasingly emerging in the field of large-scale context-aware pervasive systems (e.g. pervasive health-care, city traffic monitoring, environmental monitoring, smart grids). These large-s...
Automating the Management and Versioning of Service Models at Runtime to Support Service Monitoring
Found in: 2012 16th IEEE International Enterprise Distributed Object Computing Conference (EDOC 2012)
By Taid Holmes,Uwe Zdun,Schahram Dustdar
Issue Date:September 2012
pp. 211-218
In a model-driven service-oriented architecture (SOA), the services are in large parts generated from models. To facilitate monitoring, governance, and self-adaptation the information in these models can be used by services that monitor, manage, or adapt t...
Automatic SLA Matching and Provider Selection in Grid and Cloud Computing Markets
Found in: 2012 13th IEEE/ACM International Conference on Grid Computing (GRID)
By Christoph Redl,Ivan Breskovic,Ivona Brandic,Schahram Dustdar
Issue Date:September 2012
pp. 85-94
Cloud computing is a novel computing paradigm that offers data, software, and hardware services in a manner similar to traditional utilities such as water, electricity, and telephony. Usually, in Cloud and Grid computing, contracts between traders are esta...
Cost-Efficient and Application SLA-Aware Client Side Request Scheduling in an Infrastructure-as-a-Service Cloud
Found in: 2012 IEEE 5th International Conference on Cloud Computing (CLOUD)
By Philipp Leitner,Waldemar Hummer,Benjamin Satzger,Christian Inzinger,Schahram Dustdar
Issue Date:June 2012
pp. 213-220
Providers of applications deployed in an Infrastructure-as-a-Service cloud permanently face the decision of whether it is more cost-efficient to scale up(i.e., rent more resources from the cloud) or to delay incoming requests, even though doing so may lead...
DEMODS: A Description Model for Data-as-a-Service
Found in: Advanced Information Networking and Applications, International Conference on
By Quang Hieu Vu,Tran-Vu Pham,Hong-Linh Truong,Schahram Dustdar,Rasool Asal
Issue Date:March 2012
pp. 605-612
Cloud computing based Data-as-a-Service (DaaS) has become popular. Several data assets have been released in DaaSes across different cloud platforms. Nevertheless, there are no well-defined ways to describe DaaSes and their associated data assets. On the o...
A Novel Framework for Monitoring and Analyzing Quality of Data in Simulation Workflows
Found in: eScience, IEEE International Conference on
By Michael Reiter,Uwe Breitenbücher,Schahram Dustdar,Dimka Karastoyanova,Frank Leymann,Hong-Linh Truong
Issue Date:December 2011
pp. 105-112
In recent years scientific workflows have been used for conducting data-intensive and long running simulations. Such simulation workflows have processed and produced different types of data whose quality has a strong influence on the final outcome of simul...
Dynamic Collaborations for Information Sharing within and across Virtual Teams
Found in: Frontiers of Information Technology
By Ahmad Kamran Malik,Schahram Dustdar
Issue Date:December 2011
pp. 206-211
Dynamic teams created by different enterprises collaborate to achieve their mutual goals. User-based collaborations for a specific task, within and across teams, result in a new team represented as dynamic collaboration (c). These inter-team and intra-team...
On Analyzing and Developing Data Contracts in Cloud-Based Data Marketplaces
Found in: Asia-Pacific Conference on Services Computing. 2006 IEEE
By Hong-Linh Truong,G.R. Gangadharan,Marco Comerio,Schahram Dustdar,Flavio De Paoli
Issue Date:December 2011
pp. 174-181
Currently, rich and diverse data types have been increasingly provided using the Data-as-a-Service (DaaS) model, a form of cloud computing services. However, data offered by DaaS are constrained by several data concerns that, if not automatically being rea...
Elastic High Performance Applications -- A Composition Framework
Found in: Asia-Pacific Conference on Services Computing. 2006 IEEE
By Tran Vu Pham,Hong-Linh Truong,Schahram Dustdar
Issue Date:December 2011
pp. 416-423
With diverse and rich offerings from cloud computing providers in the open cloud market, scientists have great opportunities to design and conduct complex applications by utilizing and combining computational resources, software components and data sources...
Exchanging Data Agreements in the DaaS Model
Found in: Asia-Pacific Conference on Services Computing. 2006 IEEE
By Hong-Linh Truong,Schahram Dustdar,Joachim Götze,Tino Fleuren,Paul Müller,Salah-Eddine Tbahriti,Michael Mrissa,Chirine Ghedira
Issue Date:December 2011
pp. 153-160
Rich types of data offered by data as a service(DaaS) in the cloud are typically associated with different and complex data concerns that DaaS service providers, data providers and data consumers must carefully examine and agree with before passing and uti...
Cost-Efficient Utilization of Public SLA Templates in Autonomic Cloud Markets
Found in: Utility and Cloud Computing, IEEE Internatonal Conference on
By Ivan Breskovic,Michael Maurer,Vincent C. Emeakaroha,Ivona Brandic,Schahram Dustdar
Issue Date:December 2011
pp. 229-236
Dynamic and self-adaptable markets are fundamental for the successful implementation of the Cloud computing paradigm where computing resources are provided on demand and dynamically to the heterogeneous user base. Usually, in Cloud markets, contracts betwe...
Automating the Generation of Web Service Testbeds Using AOP
Found in: Web Services, European Conference on
By Lukasz Juszczyk,Schahram Dustdar
Issue Date:September 2011
pp. 143-150
One of the key concepts of service-oriented computing is dynamic binding which favors on-demand integration of services into a running system. Companies can outsource tasks to external partners by using their services and are able to switchover to alternat...
Resource and Agreement Management in Dynamic Crowdcomputing Environments
Found in: Enterprise Distributed Object Computing Conference, IEEE International
By Harald Psaier,Florian Skopik,Daniel Schall,Schahram Dustdar
Issue Date:September 2011
pp. 193-202
Open Web-based and social platforms dramatically influence models of work. Today, there is an increasing interest in outsourcing tasks to crowd sourcing environments that guarantee professional processing. The challenge is to gain the customer's confidence...
Opportunistic Information Flows through Strategic Social Link Establishment
Found in: Web Intelligence and Intelligent Agent Technology, IEEE/WIC/ACM International Conference on
By Florian Skopik,Daniel Schall,Schahram Dustdar
Issue Date:August 2011
pp. 308-315
Social networks have emerged from niche existence to a mass phenomenon. Nowadays, their fundamental concepts, such as managing personal contacts and sharing profile information, are increasingly harnessed for businesses in professional environments. Simila...
Esc: Towards an Elastic Stream Computing Platform for the Cloud
Found in: Cloud Computing, IEEE International Conference on
By Benjamin Satzger,Waldemar Hummer,Philipp Leitner,Schahram Dustdar
Issue Date:July 2011
pp. 348-355
Today, most tools for processing big data are batch-oriented. However, many scenarios require continuous, online processing of data streams and events. We present ESC, a new stream computing engine. It is designed for computations with real-time demands, s...
Adaptive Request Prioritization in Dynamic Service-Oriented Systems
Found in: Services Computing, IEEE International Conference on
By Roman Khazankin,Daniel Schall,Schahram Dustdar
Issue Date:July 2011
pp. 9-15
The availability of scarce resources in a service-oriented system demands for context-aware selection policies that adapt based on service-level agreements (SLAs). One of the open issues is to prioritize service requests in dynamically changing environment...
Domain-Specific Service Selection for Composite Services
Found in: IEEE Transactions on Software Engineering
By Oliver Moser,Florian Rosenberg,Schahram Dustdar
Issue Date:July 2012
pp. 828-843
We propose a domain-specific service selection mechanism and system implementation to address the issue of runtime adaptation of composite services that implement mission-critical business processes. To this end, we leverage quality of service (QoS) as a m...
Computational Social Network Management in Crowdsourcing Environments
Found in: Engineering of Complex Computer Systems, IEEE International Conference on
By Florian Skopik, Daniel Schall, Schahram Dustdar
Issue Date:April 2011
pp. 273-282
Flexible interactions in complex social and service-oriented collaboration systems increasingly demand for automated adaptation techniques to optimize partner discovery and selection. Today, applications of complex service-oriented systems can be found in ...
Test Coverage of Data-Centric Dynamic Compositions in Service-Based Systems
Found in: Software Testing, Verification, and Validation, 2008 International Conference on
By Waldemar Hummer, Orna Raz, Onn Shehory, Philipp Leitner, Schahram Dustdar
Issue Date:March 2011
pp. 40-49
This paper addresses the problem of integration testing of data-centric dynamic compositions in service-based systems. These compositions define abstract services, which are replaced by invocations to concrete candidate services at runtime. Testing all pos...
A Hybrid Sharing Control Model for Context Sharing and Privacy in Collaborative Systems
Found in: Advanced Information Networking and Applications Workshops, International Conference on
By Ahmad Kamran Malik, Schahram Dustdar
Issue Date:March 2011
pp. 879-884
Complex Web-based information systems involving multiple entities and their dynamic mobile-based collaborations require efficient techniques for context information sharing. Sharing control is a requirement for preserving the privacy of personal context an...
Expert Discovery and Interactions in Mixed Service-Oriented Systems
Found in: IEEE Transactions on Services Computing
By Daniel Schall,Florian Skopik,Schahram Dustdar
Issue Date:January 2012
pp. 233-245
Web-based collaborations and processes have become essential in today's business environments. Such processes typically span interactions between people and services across globally distributed companies. Web services and SOA are the defacto technology to ...
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