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<meta name="description" content="2016 IEEE International Conference on Cloud and Autonomic Computing (ICCAC)">
<title>ICCAC 2016 Conference</title>
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<!-- ************************ start main body ************************ -->
<!-- Start Tutorials -->
<h1>Tutorials</h1>
<h2>Context for adaptive Information Fusion</h2>
<h4>
Presenter
</h4>
<div class="saso-image">
<img src="images/Lauro_Snidaro.jpg" alt="Dr. Lauro Snidaro"></img>
</div>
<p>
Dr. Lauro Snidaro<br>
Dept. Mathematics, Computer Science, and Physics<br>
University of Udine<br>
Udine, Italy
</p>
<h4>
Tutorial Description
</h4>
<p>
Over the last few years, context-aware Information Fusion (IF) has gained increasing attention. Contextual Information (CI) can be understood as the information that “surrounds” an observable of interest, possibly influencing its state or even the sensing and estimation processes themselves.
</p>
<p>
The development of IF systems, to include data-, sensor-, and feature-level fusion, is a necessary engineering process in diverse applications, and new domains are more and more requiring an increasing degree of contextualized solutions and situation-adaptation mechanisms.
</p>
<p>
Typical advantages provided by the exploitation of CI include constrained estimates, refined inferences, and process adaptation.
</p>
<p>
Therefore, understanding and exploiting CI can be a key element for improving the performance of IF algorithms and automatic systems in general that have to deal with varying operating conditions.
</p>
<p>
Application examples include: context-aided surveillance systems (security/defence), traffic control, autonomous navigation, cyber security, ambient intelligence, ambient assistance, etc.
</p>
<p>
The purpose of this tutorial is to survey existing approaches for context-enhanced IF, covering the design and development of solutions integrating sensory data with contextual knowledge.
</p>
<p>
After discussing CI in other domains, the tutorial will focus on context representation and exploitation aspects for IF systems.
The applicability of the presented approaches will be illustrated in fusion processes at different levels: from target tracking to situation assessment and reasoning.
</p>
<h4>Topics will include</h4>
<ul>
<li>Representation and exploitation of contextual information at different levels of an IF system</li>
<li>Managing of heterogeneous contextual sources</li>
<li>Adaptation techniques to have the system respond not only to changing target’s state but also to the surrounding environment</li>
<li>Architectural issues and possible solutions</li>
<li>Augmentation of tracking and situation assessment algorithms with contextual information</li>
</ul>
<h4>
Intended audience
</h4>
<ul>
<li>Computer scientists</li>
<li>Students</li>
<li>Information Fusion practitioners</li>
</ul>
<br /><br />
<a name="tutorial1"></a>
<h2>
Knowledge Level Models of Situations and Situation Assessment: Theory and Applications.
</h2>
<h4>Presenter</h4>
<div class="saso-image">
<img src="images/ErikGundersen.jpg" alt="Erik Gundersen"></img>
</div>
<p>
Odd Erik Gundersen<br>
Norwegian University of Science and Technology
</p>
<h4>Tutorial Description</h4>
<p>
The concept of a situation is central to the situation management community. Still, the concept is not clearly defined and, often, research on the topic rarely refer to the definition of situation that the research is based on. This is probably because the concept of a situation is elusive and a common definition has not been agreed on. The tutorial will start with an introduction to different definitions of the concept of a situation, so that the audience can get a better grasp of complexities related to defining situations. The definitions will be analyzed and a definition that bring these together will be discussed. A formal framework for describing situations based on the proposed definition will presented. The framework will be used to discuss situations that develop over time, observers and situations, future situations, the concept of history, explanations and justifications of predictions.
</p>
<p>
The three sub-processes of situation assessment is described in Endsley’s three situation awareness levels. However, while the levels are given detailed descriptions, they are not related directly to any definition of the concept of a situation. By analyzing the concept of a situation in relation to the situation awareness levels, the situation awareness levels can be decomposed further into more fine grained levels. These fine-grained levels are described as a knowledge level model of situation assessment that includes a task tree, a goal analysis and detailed task description. The knowledge level model is used to enhance and detail Endsley’s three levels of situation awareness model.
</p>
<p>
The concept of context is an elusive one as well. Bazire and Brezillon have analyzed 150 definitions of context found on the web, and some of these definitions will be reviewed. The definitions will be discussed and analyzed in relation to the concepts situation and situation assessment. Furthermore, the role of context in situation assessment will be analysed, and a context element ontology will be presented. A formal framework for describing situation assessment will be presented.
</p>
<p>
Examples of how the knowledge level model and the formal framework can be used to analyze domains will be given. Two different use cases will analyzed using the methods presented, and these are oil well drilling and emergency services. Both use cases are interesting because the situations are assessed remotely by the observers the analyses focus on. The drilling engineers assess the situation in the wellbore, which can be 10 000 feet below the drilling rig, indirectly through interpreting real-time measurements. Emergency call centre operators assess situations through callers describing emergencies over the phone. The examples include situation descriptions, task and goal analyses, a discussion of context elements and the role of context
</p>
<h4>Intended Audience</h4>
<p>
The intended audience is everyone that is interested in situation management, as the tutorial provides an introduction and overview to central concepts in situation awareness and situation assessment. However, the knowledge level model is most suited for researchers and software developers that develop systems that perform situation assessment and need to model situations.
</p>
<br />
<!-- ************************** New Presenter ************************** -->
<a name="tutorial4"></a>
<h2>
Solving Soft Constraint Problems in Autonomic Systems with MiniBrass
</h2>
<div class="saso-image">
<img src="images/schiendorfer.png" alt="Alexander Schiendorfer"></img>
</div>
<h4>Presenter</h4>
<p>
Alexander Schiendorfer<br>
University of Augsburg
</p>
<h4>Tutorial Description</h4>
<p>
Combinatorial optimization problems (possibly NP-hard) present themselves
in various facets of self-organizing and autonomic computing systems -- in particular
during the planning phase of the well-known MAPE loop.
Examples thereof include resource allocation, role allocation, team formation,
task scheduling/planning, or combinatorial auction. Desirable (or even valid) goal states
adhere certain logical constraints. If not all goals can be achieved, developers are required to supply
preference specifications to agents acting on their behalf.
Instead of developing dedicated optimization algorithms for each of these problems,
one can resort to constraint modeling languages and have the problem solved by
efficient, highly-optimized solvers. In combination with user-friendly preference formalisms,
this technology can be be a valuable asset in the repertoire of researchers in autonomic
systems. This tutorial provides an accessible, <i>practical introduction</i> to the field, exemplified
by various models taken from the domain of self-organizing systems, in <i>MiniBrass</i> -- a soft constraint library
extension to the state-of-the-art constraint modeling language <i>MiniZinc</i>.
</p>
<h4>Intended Audience</h4>
<p>
Researchers in self-organizing/autonomous systems that are interested in the systematic development of optimization models for state-of-the-art solvers. The tutorial targets possible “end-users” and not necessarily “developers” of either modeling languages or constraint solvers.
</p>
<!-- ************************** New Presenter ************************** -->
<br />
<a name="tutorial2"></a>
<h2>
Model-based Cloudification of Critical Applications
</h2>
<div class="saso-imageSM">
<img src="images/gonczy.jpg" alt="gonczy"></img>
<img src="images/kocsis.jpg" alt="kocsis"></img>
<img src="images/pataricza.jpg" alt="pataricza"></img>
</div>
<h4>Presenter</h4>
<p>
Prof. András Pataricza, Imre Kocsis, László Gönczy <br />
Budapest University of Technology and Economics <br /> Department of Measurement and Information Systems
</p>
<h4>Tutorial Description</h4>
<p>
As more and more critical services are deployed in cloud-based environments, the design for dependability and performance over complex and partially uncontrolled platforms is becoming a key issue in several domains. The proposed tutorial aims at giving methodology and practical tools which help an end-to-end process for “cloudification” of applications and creating policies for the operation of such systems. We propose qualitative models which follow the engineers’ way of thinking in system level assumptions and capture consequences of design decisions on system topology, deployment and characteristics of application level processes. </p>
<p>
The method can be used for performance design (including measurement/benchmarking campaigns and SLA definition) and evaluation of deployment alternatives. Derivatives of high level models can be used runtime for monitoring and control, diagnosis purposes and proof of correctness of supervisory control as well.</p>
<p>
The tutorial introduces qualitative modelling of IT system performance and dependability. Approaches for partial models reflecting individual aspects and validation – first-principles, engineering knowledge capture, synthesis from existing models, exploratory data analysis – are demonstrated. Hands-on model building will be performed using benchmark results of a distributed, soft-real time cloud application.
Further hands-on activities show the application of the simulated model for evaluating dependability/performance test coverage, diagnosis and evaluating the effects of static and dynamic dependability mechanisms. Moreover, we present how the findings can be utilized as a solid basis for assuring self-* properties.
</p>
<h4>Intended Audience</h4>
<p>
Targeted audience of the tutorial are professionals as well as researchers working in cloud application dependability and performance assurance can highly benefit from the tutorial. The potential application area is wide, ranging from general-purpose OLTP-style cloud applications through Network Function Virtualization to cloud backends of Cyber-Physical Systems. A large part of the material is easily adaptable to enterprise systems and certain blocks apply to embedded systems, too.
</p>
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