Loading...
Search for:
semi-structured
0.005 seconds
A model-driven approach to semi-structured database design
, Article Frontiers of Computer Science ; Volume 9, Issue 2 , 2015 , Pages 237-252 ; 20952228 (ISSN) ; Mirian Hosseinabadi, S ; Sharif University of Technology
Higher Education Press
2015
Abstract
Recently XML has become a standard for data representation and the preferred method of encoding structured data for exchange over the Internet. Moreover it is frequently used as a logical format to store structured and semi-structured data in databases. We propose a model-driven and configurable approach for modeling hierarchical XML data using object role modeling (ORM) as a flat conceptual model. First a non-hierarchical conceptual schema of the problem domain is built using ORM and then different hierarchical views of the conceptual schema or parts of it are specified by the designer using transformation rules. A hierarchical modeling notation called H-ORM is proposed to show these...
A top down approach to semi-structured database design
, Article 2nd International Conference on the Applications of Digital Information and Web Technologies, ICADIWT 2009 ; 2009 , Pages 26-31 ; 9781424444571 (ISBN) ; Mirian Hosseinabadi, S. H ; Sharif University of Technology
Abstract
XML has become the preferred format for representing and exchanging structured and semi-structured data on the web. The XML Schema language is widely used for defining and validating highly structured XML instance documents. While text-based languages, such as XML-Schema, offer great advantages for data interchange on the Internet, graphical modeling languages are widely accepted as a more visually effective means of specifying and communicating data requirements for a human audience. This paper uses Object-Relationship-Attribute model (ORA-SS) as a conceptual graphical model for designing XML-Schemas. To facilitate this process we introduce an xml representation for ORA-SS Schema Diagram...
Automatic Extraction of Persian Named Entities’ Knowledge Graph from Web Sources
, M.Sc. Thesis Sharif University of Technology ; Izadi, Mohammad (Supervisor)
Abstract
Knowledge graphs are structured data sources which are widely used in the information process techniques. There are general and specialized knowledge graphs out there. These graphs will be used as the kernel of future search engines. Due to the lack of proper and tested Persian knowledge graphs, a method for knowledge graph extraction from news sources of the web has been introduced in this research.A knowledge graph extraction system from the unstructured web sources has been implemented in this research. In order to achieve this, a training dataset for the classifier was first extracted from semi-structured data of Wikipedia pages. At that time sentences were extracted from the...
Classification of Semi-structured Documents
, M.Sc. Thesis Sharif University of Technology ; Movaghar Rahimabadi, Ali (Supervisor)
Abstract
Semi-structured documents are a new type of textual documents which has gained a lot of attention nowadays to itself. A specific document modeling for boosting classifiers is needed more than ever which reflects major document specifications. The main goal of this thesis is presenting new adaptive model based on semi-structured documents features. We also aim to use some problem solving approaches such as Statistical approach, Machine Learning and few Algorithmic solutions. In some cases 10% precision optimization can be seen compare to the best approaches available nowadays
A Unified Approach to Modeling and Design of Semi-structured Databases
, Ph.D. Dissertation Sharif University of Technology ; Mirian Hosseinabadi, Hassan (Supervisor)
Abstract
Recently XML has become a standard for data representation and the preferred method of encoding structured data for exchange over the Internet. Moreover it is frequently used as a logical format to store structured and semi-structured data in databases. In this research we focus on semantic modeling for XML data and we propose a model-driven approach for modeling and designing XML databases. In the approach data is modeled without considering representation and implementation details in a platform independent model.
We use Object-Role Modeling as the platform independent model. We specify a formal meta-model of this model in Alloy and we validate instance models by checking...
We use Object-Role Modeling as the platform independent model. We specify a formal meta-model of this model in Alloy and we validate instance models by checking...
The sources of stigma and the impacts on Afghan refugees with substance abuse disorders: A qualitative study in Iran
, Article Journal of Ethnicity in Substance Abuse ; Volume 19, Issue 4 , 2020 , Pages 610-622 ; Moghanibashi Mansourieh, A ; Mohammadian, A ; Puyan, D ; Sharif University of Technology
Routledge
2020
Abstract
Iran is the fourth refugee-hosting country and Afghanistan is the second refugee-source country in the world. This research is qualitative and conducted with content analysis method. Twenty-seven individuals participated in the study. They were recruited from two midterm residential drug treatment centers in Tehran. Afghan refugees who use drugs felt and experienced stigma in five areas: family, friends, workplace, neighborhood, and treatment center. The consequences include frequent treatment failure, family relationship disruption, superficial conformity with the host society, and self-stigma. It is necessary to design interventions to reduce stigma and discrimination attached to refugees....