Prof. Dr. Dr. h.c. Sahin Albayrak

This work aims to resolve issues related to Web Service retrieval, also known as Service Selection, Discovery or essentially Matching, in two directions. The algorithm is hybrid in nature, combining novel and known concepts, such as a logic-based strategy and syntactic text-similarity measures on semantic annotations and textual descriptions. A plugin for the S3 contest environment was developed, in order to position Tomaco amongst state-of-the-art in an objective, reproducible manner. Evaluation showed that Tomaco ranks high amongst state of the art, especially for early recall levels. Secondly, this work introduces the Tomaco web application, which aims to accelerate the wide-spread adoption of Semantic Web Service technologies and algorithms while targeting the lack of user-friendly applications in this field. Tomaco integrates a variety of configurable matching algorithms proposed in this paper. It, finally, allows discovery of both existing and user-contributed service collections and ontologies, serving also as a service registry.

Semantic web services : advancement through evaluation

Introduction to the Special Issue: The promise of the Semantic Web is to make machine understandable all the information available on the Web. The knowledge on any specific domain can be stored in an explicit and reusable format by means of ontology languages. Moreover, exploiting the formal semantics of ontology languages, implicit knowledge can be elicited through automated reasoning mechanisms. Semantic Web technologies open new scenarios and suggest new approaches to classical problems.

The envisaged applications are obvious in e-commerce, Web services, and peer-to-peer interaction, to mention a few.

The ability to dynamically discover and invoke a Web Service is a critical aspect of Service Oriented Architectures. An important component of the discovery process is the matchmaking algorithm itself. In order to overcome the limitations of a syntax-based search, matchmaking algorithms based on.

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A framework for semantic web services discovery

Add to basket Add to wishlist Description Over the last decade, a great amount of effort and resources have been invested in the development of Semantic Web Service SWS frameworks. Numerous description languages, frameworks, tools, and matchmaking and composition algorithms have been proposed. Nevertheless, when faced with a real-world problem, it is still very hard to decide which of these different approaches to use. In this book, the editors present an overall overview and comparison of the main current evaluation initiatives for SWS.

The presentation is divided into four parts, each referring to one of the evaluation initiatives. The introduction to each part provides an overview of the evaluation initiative and overall results for its latest evaluation workshops.

Intelligent Web Services System Based on Matchmaking Algorithm. problems of the existing Web services are analyzed and the extended semantic Web service model applying the semantic Web.

Di Noia , E. Di Sciascio , F. Donini Submitted on 12 Oct Abstract: Matchmaking arises when supply and demand meet in an electronic marketplace, or when agents search for a web service to perform some task, or even when recruiting agencies match curricula and job profiles. In such open environments, the objective of a matchmaking process is to discover best available offers to a given request. We address the problem of matchmaking from a knowledge representation perspective, with a formalization based on Description Logics.

We devise Concept Abduction and Concept Contraction as non-monotonic inferences in Description Logics suitable for modeling matchmaking in a logical framework, and prove some related complexity results. We also present reasonable algorithms for semantic matchmaking based on the devised inferences, and prove that they obey to some commonsense properties. Finally, we report on the implementation of the proposed matchmaking framework, which has been used both as a mediator in e-marketplaces and for semantic web services discovery.

Computer Science > Artificial Intelligence

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An important component of the discovery process is the matchmaking algorithm itself. In order to overcome the limitations of a syntax-based search, matchmaking algorithms based on semantic techniques have been proposed.

Annotations can be exported in OWL-S. ASSAM is still under development and should be seen as a “technology preview”, not an industrial-strength application. Download and detailed instructions on http: Jaeger, Technische Universitaet Berlin The matcher demonstrates another algorithm that outputs different degrees of matching for individual elements of DAML-S descriptions.

In detail, the algorithm considers elements of the service profile. With ranking a criterion is available to select a service among a large set of results. Consider the result of flat matchmaking that consists of a set of matching and another set of non-matching services. If an autonomous system must still choose one of the set of matching services.

An ordered list of services provides a decision support to autonomously choose the best servicepossible. Rama Akkiraju, IBM Research As the set of available Web Services expands, it becomes increasingly important to have automated tools to help identify services that match a requester’s requirements. Finding suitable Web Services depends on the facilities available for service providers to describe the capabilities of their services and on the facilities available for service requesters to describe their requirements in an unambiguous and machine-interpretable form.

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To further that effort, today we are introducing similarity search on Flickr. In many ways, photo search is very different from traditional web or text search. First, the goal of web search is usually to satisfy a particular information need, while with photo search the goal is often one of discovery; as such, it should be delightful as well as functional. We have taken this to heart throughout Flickr. Second, in traditional web search, the goal is usually to match documents to a set of keywords in the query.

That is, the query is in the same modality—text—as the documents being searched.

we present concepts involved in semantic matchmaking as it applied to web services and a set of algorithms that solve the semantic matchmaking problem. Background concepts.

Semantic annotation of Web documents transforms Web content into semantic Web documents. De Maio et al. The approach is that, starting from Web resources, content with a high level of abstraction is obtained: The framework is designed to process resources from different sources and to generate an ontology-based annotation. The method is based on an algorithm that compares the set of words appeared before and after the named entities with the content of Wikipedia articles and identifies the most relevant one by means of a similarity measure.

Then, it establishes a connection between the named entities and some URI in the semantic Web. Based on concept frequency TF and inverse document frequency IDF , the method selects ontology concepts from an existing biomedical ontology to semantic annotate texts. Rong [ 6 ] summarized seven semantic annotation methods of Web documents and proposed a similar rule strategy method SRSM and a method on the basis of tree conditional random fields MTCRF.

Currently, a few of existing researches on semantic annotation in IoT focus on sensor network data. The framework aims to support semantic annotation of IoT stream data by taking dimensionality and reliability into account to enable delivery of large volume of data using Message Queuing Protocol AMPQ. Wei and Barnaghi [ 15 ] discussed a semantic annotation method of sensor data SAM4SD and focused on the idea of semantic sensor Web by extending the discussion of semantic annotation using concepts taken from various domain ontologies.

Chenyi [ 16 ] proposed a service-oriented entity semantic annotation framework SOESAF , which manually annotates the function, state, and basic information of entities. It discussed a semantic annotation ontology model of IoT entities, which manually packages the information of IoT entities to Web services and annotates the function of IoT entities using Web services after clustering [ 8 ].

Semantic Web Services Language Requirements

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Based on the Semantic Web Service framework, semantic matchmaker, specification matching and probabilistic matching, this paper proposes a fuzzy matchmaking approach for Semantic Web Services to support a more automated and veracious service discovery process in collaborative manufacturing environments.

A service description or capability request that is submitted to some individual or intermediary e. A description of a desired service. Result of a negotiation process if successful? Condition involving predicates on any combination of these states: A description of a service in terms of a what is required by the service in order that it can execute successfully, and b what is generated by the successful execution of the service. This includes data elements i.

A formula involving any of the above types of predicates. Effect of an action: The actual change to the initial state that the action does. Note that the effect can be specified as a formula that involves the final state, but, unlike the postcondition, such a formula is always true in any final state of the action. Execution of a negotiation protocol Non-functional Description: A description of a service in terms of its descriptive metadata, such as a reference to a classification type, or characteristics that are not directly related to the functional description of the service.

Mediation spaces for similarity-based semantic web services selection

Look up in Google Scholar Abstract Semantic Web Services SWS aim at the automated discovery, selection and orchestration of Web services on the basis of comprehensive, machine-interpretable semantic descriptions. However, heterogeneities between distinct SWS representations pose strong limitations w. Hence, semantic-level mediation, i. In that, semantic-level mediation requires to identify similarities across distinct SWS representations.

Abstract: In this paper, we mainly propose some matchmaking algorithms of Semantic Web service based on OWL-S to facilitate the comparison of input and output within service requestor and service provider, and thus lead to more accurate matchmaking.

Our research focuses on graphs and their multiple applications: Matthew Fluet , congrats! Check some cool videos from participants: It presents a survey of techniques for perform crawling to extract data from the Deep Web. Assistant for Repetitive Code Comprehension. We used subgraph pattern matching against program dependence graphs to assist in program comprehension.

Rivero was the chair of the Social networks session. We developed a new framework to provide personalized feedback in introductory programming courses. Rivero delivered two seminars at RIT. He presented his work on providing personalized feedback using subgraph pattern matching in introductory programming courses. The Rochester Theory Seminar. Efficient and scalable labeled subgraph matching using SGMatch. It presents a new exact subgraph matching technique based on graphlets and minimum hub covers.

Using context to improve integration in the Web of Data.

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This functionality is usually provided by matchmaking capabilities which may themselves be deployed as services, brokers or middle agents that select the services that are closest to a requested service on the basis of a declarative characterization of the capabilities of both service requested and services provided. More generally, resource retrieval extends the notion of service matchmaking to the process of discovering any kind of Web resources ranging from services, data, information, knowledge to networked physical objects, persons and organizations for given application settings and purposes.

It is at the core of several scenarios in the Semantic Web area, spanning from Web services, Grid computing, and Peer-to-Peer computing, to applications such as e-commerce, human resource management, and social networking applications. The primary objective of this workshop is to bring together academic and industry researchers and industry practitioners who tackle semantic service matchmaking and discovery from various points of view.

The proposed algorithm is based on semantic distance measuring between the request (R) and the tested semantic web service (S). The output of the algorithm is not a matchmaking decision; it is a number that is called semantic distance measuring between R and S (sdmRS).

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Challenges

This paper shows a matchmaking algorithm to discover Semantic Web Services that are satisfying client requirements. At least fifty percent average gain in search relevancy is obtained when our matchmaking algorithm is applied to WSs that are actually matching the chosen fuzzy semantic theme. Introduction One of the crucial steps in an efficient Web service search is to understand what users mean in their request.

The search request is usually in the form of natural language. The current popular search engines literally take the search input without much semantic interpretation and attempt to find WS that may contain all or some of the keywords in the input query.

A Hybrid Matchmaking Algorithm for Semantic Web Service Abstract: An important component of the Web service is the matchmaking between service requests and service advertisements. This paper concentrates on the development of a hybrid Web service matchmaking approach that aims to combine the merits of fuzzy rough set theory and of bipartite.

Research picks Researching research Researchers in Italy have devised a new social network analysis-based approach to studying research scenarios. The multidimensional picture they can obtain of research in a set of countries using this technique can reveal interest and might even be able to detect hubs operating within those countries. Paolo Lo Giudice and Domenico Ursino of the University ‘Mediterranea’ of Reggio Calabria, Paolo Russo of Negg International, in Rome, explain that such improved understanding might lead to new insights into how socio-economic factors influence research.

The team has investigated the North African countries of Algeria, Egypt, Morocco, and Tunisia in the anticipation of providing new knowledge to policymakers who might then be able to sustain the accumulation of scientific and technological capabilities in the region in a way that has not been possible previously. The data available for scientometrics and bibliometrics investigations of scientific and technological research continues to grow apace.

There is therefore an urgent need, if use is to be made of this “big data”, to develop the necessary tools examine and interpret this data and to plot out meaning and extract knowledge from it. The team’s success with their social network analysis SNA approach now points them towards developing the approach still further to extract knowledge patterns about patent inventors and how they cooperate, to verify the presence of ‘power inventors’ in a given country, and to verify the existence of a backbone and of possible cliques among them.

Business Innovation and Research, Vol. He points out that for this region, mobility has been an important aspect of humanity for millennia. However, in today’s environment of climate change marginalizing those who live on the fringes of the habitable zones of the world, there are growing issues of broader security and geopolitical challenges to face too, including water scarcity. While other observers have warned of mass migrations that might arise because of climate change and the problems it brings in this region, their predictions often ignore the rich heritage of human mobility in this region as well as not necessarily taking into account the adaptability of the people of this and neighbouring regions.

Algorithms and Matchmaking panel at IWNY HQ 2012