Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 30 of 86
Full-Text Articles in Engineering
Oil Droplet Behavior At A Pore Entrance In The Presence Of Crossflow: Implications For Microfiltration Of Oil-Water Dispersions, Nikolai V. Priezjev, Tohid Darvishzadeh, Volodymyr V. Taravara
Oil Droplet Behavior At A Pore Entrance In The Presence Of Crossflow: Implications For Microfiltration Of Oil-Water Dispersions, Nikolai V. Priezjev, Tohid Darvishzadeh, Volodymyr V. Taravara
Mechanical and Materials Engineering Faculty Publications
The behavior of an oil droplet pinned at the entrance of a micropore and subject to clossflow-induced shear is investigated numerically by solving the Navier-Stokes equation. We found that in the absence of crossflow, the critical transmembrane pressure required to force the droplet into the pore is in excellent agreement with a theoretical prediction based on the Young-Laplace equation. With increasing shear rate, the critical pressure of permeation increases, and at sufficiently high shear rates the oil droplet breaks up into two segments. The results of numerical simulations indicate that droplet breakup at the pore entrance is facilitated at lower …
Thoughts On The Complex Relation Between Linked Data, Semantic Annotations, And Ontologies, Krzysztof Janowicz, Pascal Hitzler
Thoughts On The Complex Relation Between Linked Data, Semantic Annotations, And Ontologies, Krzysztof Janowicz, Pascal Hitzler
Computer Science and Engineering Faculty Publications
The relation between data, annotations, and schemata seems straightforward at first: Data are annotated with additional meta information according to some schemata in order to expose additional non-intrinsic characteristics relevant to the meaningful interpretation of said data. However, on closer examination, things are not as simple. Focusing on geo-information retrieval, we will try to disentangle the aforementioned relations. We will report from our own experience and from observations gathered by editing papers about ontologies and Linked Data for the Semantic Web journal.
Linked Scientometrics: Designing Interactive Scientometrics With Linked Data And Semantic Web Reasoning, Grant Mckenzie, Krzysztof Janowicz, Yingjie Hu, Kunal Sengupta, Pascal Hitzler
Linked Scientometrics: Designing Interactive Scientometrics With Linked Data And Semantic Web Reasoning, Grant Mckenzie, Krzysztof Janowicz, Yingjie Hu, Kunal Sengupta, Pascal Hitzler
Computer Science and Engineering Faculty Publications
In this demo paper we introduce a Linked Data-driven, Semantically-enabled Journal Portal (SEJP) that offers a variety of interactive scientometrics modules. SEJP allows editors, reviewers, authors, and readers to explore and analyze (meta)data published by a journal. Besides Linked Data created from the journal's internal data, SEJP also links out to other sources and includes them to develop more powerful modules. These modules range from simple descriptive statistics, over the spatial analysis of visitors and authors, to topic trending modules. While SEJP will be available for multiple journals, this paper shows its deployment to the Semantic Web journal by IOS …
Editing R2rml Mappings Made Easy, Kunal Sengupta, Peter Haase, Michael Schmidt, Pascal Hitzler
Editing R2rml Mappings Made Easy, Kunal Sengupta, Peter Haase, Michael Schmidt, Pascal Hitzler
Computer Science and Engineering Faculty Publications
The new W3C standard R2RML3 defines a language for ex- pressing mappings from relational databases to RDF, allowing applications built on top of the W3C Semantic Technology stack to seamlessly integrate relational data. A major obstacle in using R2RML, though, is the creation and maintenance of mappings. In this demo, we present a novel R2RML mapping editor which provides a user interface to create and edit mappings interactively even for non-experts.
D-Sparq: Distributed, Scalable And Efficient Rdf Query Engine, Raghava Mutharaju, Sherif Sakr, Alessandra Sala, Pascal Hitzler
D-Sparq: Distributed, Scalable And Efficient Rdf Query Engine, Raghava Mutharaju, Sherif Sakr, Alessandra Sala, Pascal Hitzler
Computer Science and Engineering Faculty Publications
We present D-SPARQ, a distributed RDF query engine that combines the MapReduce processing framework with a NoSQL distributed data store, MongoDB. The performance of processing SPARQL queries mainly depends on the efficiency of handling the join operations between the RDF triple patterns. Our system features two unique characteristics that enable efficiently tackling this challenge: 1) Identifying specific patterns of the input queries that enable improving the performance by running different parts of the query in a parallel mode. 2) Using the triple selectivity information for reordering the individual triples of the input query within the identified query patterns. The preliminary …
Distel: A Distributed El+ Ontology Classifier, Raghava Mutharaju, Pascal Hitzler, Prabhaker Mateti
Distel: A Distributed El+ Ontology Classifier, Raghava Mutharaju, Pascal Hitzler, Prabhaker Mateti
Computer Science and Engineering Faculty Publications
OWL 2 EL ontologies are used to model and reason over data from diverse domains such as biomedicine, geography and road traffic. Data in these domains is increasing at a rate quicker than the increase in main memory and computation power of a single machine. Recent efforts in OWL reasoning algorithms lead to the decrease in classification time from several hours to a few seconds even for large ontologies like SNOMED CT. This is especially true for ontologies in the description logic EL+ (a fragment of the OWL 2 EL profile). Reasoners such as Pellet, Hermit, ELK etc. make …
Stringsauto And Mapsss Results For Oaei 2013, Michelle Cheatham, Pascal Hitzler
Stringsauto And Mapsss Results For Oaei 2013, Michelle Cheatham, Pascal Hitzler
Computer Science and Engineering Faculty Publications
StringsAuto and MapSSS are two closely related ontology alignment systems. The StringsAuto matcher seeks to explore the limits of a syntactic-only approach to alignment. The MapSSS system then expands on this work by embedding the syntactic matching of StringsAuto within a more complete alignment system that also makes use of semantic and structural information. In this paper we describe the basic operation of the two systems and discuss their performance in the OAEI 2013 evaluation.
A Linked-Data-Driven And Semantically-Enabled Journal Portal For Scientometrics, Yingjie Hu, Krzysztof Janowicz, Grant Mckenzie, Kunal Sengupta
A Linked-Data-Driven And Semantically-Enabled Journal Portal For Scientometrics, Yingjie Hu, Krzysztof Janowicz, Grant Mckenzie, Kunal Sengupta
Computer Science and Engineering Faculty Publications
The Semantic Web journal by IOS Press follows a unique open and transparent process during which each submitted manuscript is available online together with the full history of its successive decision statuses, assigned editors, solicited and voluntary reviewers, their full text reviews, and in many cases also the authors’ response letters. Combined with a highly-customized, Drupal-based journal management system, this provides the journal with semantically rich manuscript time lines and networked data about authors, reviewers, and editors. These data are now exposed using a SPARQL endpoint, an extended Bibo ontology, and a modular Linked Data portal that provides interactive scientometrics …
String Similarity Metrics For Ontology Alignment, Michelle Cheatham, Pascal Hitzler
String Similarity Metrics For Ontology Alignment, Michelle Cheatham, Pascal Hitzler
Computer Science and Engineering Faculty Publications
Ontology alignment is an important part of enabling the semantic web to reach its full potential. The vast majority of ontology alignment systems use one or more string similarity metrics, but often the choice of which metrics to use is not given much attention. In this work we evaluate a wide range of such metrics, along with string pre-processing strategies such as removing stop words and considering synonyms, on different types of ontologies. We also present a set of guidelines on when to use which metric. We furthermore show that if optimal string similarity metrics are chosen, those alone can …
Ceg 4350/6350-01: Os Internals And Design, Soon M. Chung
Ceg 4350/6350-01: Os Internals And Design, Soon M. Chung
Computer Science & Engineering Syllabi
Introduction to basic concepts of operating systems, including process and thread management, CPU scheduling, process synchronization, memory management, file systems.
Ceg 4330/6300-02: Microprocessor-Based Embedded Systems, Jack Jean
Ceg 4330/6300-02: Microprocessor-Based Embedded Systems, Jack Jean
Computer Science & Engineering Syllabi
No abstract provided.
Ceg 2350: Os Concepts And Usage, Prabhaker Mateti
Ceg 2350: Os Concepts And Usage, Prabhaker Mateti
Computer Science & Engineering Syllabi
Provides introduction to Linux and Windows operating systems and system administration. Covers files and directories, ownership and sharing, programs and processes, system calls, libraries, dynamic linking, command line shells, scripting, regular expressions and secure network protocols.
Ceg 7350-01: Computer Architecture, Soon M. Chung
Ceg 7350-01: Computer Architecture, Soon M. Chung
Computer Science & Engineering Syllabi
Review of sequential computer architecture and study of parallel computers.
Topics include memory hierarchy, reduced instruction set computer, pipeline
processing, multiprocessing, various parallel computers, and interconnection networks.
Ceg 2170-01: Introduction To C Programming For Engineers, Shaojun Wang
Ceg 2170-01: Introduction To C Programming For Engineers, Shaojun Wang
Computer Science & Engineering Syllabi
Basic engineering problem solving using the C programming language. Topics include loops, selection, input/output, files, functions, arrays, complex variables, pointers, structures, and dynamic memory. Students will learn how to approach solving problems in engineering and science; how to develop algorithms, using advanced techniques such as recursion, searching, s01ting and linked lists, to solve those problems; and how to implement those algorithms in the C language.
Ceg 3110/5110-01: Introduction To Software Testing, John A. Reisner
Ceg 3110/5110-01: Introduction To Software Testing, John A. Reisner
Computer Science & Engineering Syllabi
This course covers software testing strategies, along with established best practices, to teach students how to test software in a complete and systematic (vice ad-hoc) manner. Particular attention is paid to planning, writing, and executing software tests, along with associated documentation, (i.e., a software test plan), which includes documented results. Various projects are assigned, designed to illustrate various challenges associated with software testing, and to reinforce the strategies and techniques used to overcome these challenges.
Ceg 2400-01: Introduction To Pc Networks, Jerry Hensley
Ceg 2400-01: Introduction To Pc Networks, Jerry Hensley
Computer Science & Engineering Syllabi
Introduction to networking technologies including infrastructure and architectures, standards, protocols and directory services, administration, security and management. Integrated lecture and lab.
Ceg 3320-01: Digital System Design, Travis E. Doom
Ceg 3320-01: Digital System Design, Travis E. Doom
Computer Science & Engineering Syllabi
Basics of Digital Computer Hardware and Design. Topics include switching algebra and switching functions, logic design of combinational and sequential circuits, storage elements, register-level design, and instrumentation. 3 hours lecture, 1 credit hour lab.
Ceg 4110/6110-01: Introduction To Software Computer Engineering, Junjie Zhang
Ceg 4110/6110-01: Introduction To Software Computer Engineering, Junjie Zhang
Computer Science & Engineering Syllabi
This course will focus on discussing the principles and techniques used in software engineering. It will cover the essential topics including UML, Requirements Elicitation, Analysis, System Design, Object Design, and Testing. In addition, we will discuss common security practices in the software engineering framework. This class is targeted at both undergraduate and graduate students who have adequate background in computer science, computer engineering, or related areas. Students who successfully complete this course will be capable of effectively participating in software engineering activities.
Ceg 4420/6420-01: Host Computer Security, Prabhaker Mateti
Ceg 4420/6420-01: Host Computer Security, Prabhaker Mateti
Computer Science & Engineering Syllabi
This course introduces security hardening of a single system, and how to protect it when connected to a network. It explains how malware can compromise security and privacy from the moment a machine is powered on until shut down. Topics include Privilege Escalation, Buffer Overruns, Network Packet Mangling, Session Hijacking, Firewalls, and ethics. Lab work uses tools such as nmap and Kali (BackTrack) Linux. Prerequisites: CEG4350
Ceg 4400/6400-01: Computer Networks And Security, Bin Wang
Ceg 4400/6400-01: Computer Networks And Security, Bin Wang
Computer Science & Engineering Syllabi
This course provides an introduction to basic concepts of communication networks and network security, different types of networks, protocols over different layers, applications, and security issues, through lectures, labs, homework, and reading on relevant materials. You will
•Understand networking principles, protocols, and technologies.
•Understand design and performance issues involved in providing network
services.
•Acquire background for supporting e-commerce, e-government, and e-education.
•Gain hands-on experiences through implementation of simple network
protocols.
•Preparation for research or taking advanced courses in computer networks and
security.
Ceg 4980/4981-01: Team Projects I And Ii, John C. Gallagher
Ceg 4980/4981-01: Team Projects I And Ii, John C. Gallagher
Computer Science & Engineering Syllabi
CEO 4980/4981 (Team Projects I and 11) is a summative computer science and engineering design project course that builds upon previous computer science, computer engineering, science, mathematics and communications course work. CS 4980/4981 projects arc two semesters in length and must be completed in groups of at least three students. Projects are selected under the guidance of the course instructor and/or other faculty advisors and are tailored to student interest and the specific degree program (BSCS or BSCE) of each student. Students are evaluated both on their individual contributions as recorded in a graded engineering journals and on the quality …
Ceg 4500/6500-01: Computer Graphics, Thomas Wischgoll
Ceg 4500/6500-01: Computer Graphics, Thomas Wischgoll
Computer Science & Engineering Syllabi
By the end of this quarter, you will have learnt techniques for constructing 2-D and 3-D objects as well as manipulating and rendering the objects using OpenGL
The outline of the course is as follows:
• Introduction
• Geometric primitives
• Attributes of geometric primitives
• Antialiasing techniques
• Homogeneous coordinate system
• 2-D and 3-D viewing transformations
• Structures and hierarchical modeling
• Input devices and interactive techniques
• Visible surface detection methods
• Three-Dimensional Object Representations (chapter 8)
• Visible-Surface Detection (chapter 9)
• Illumination Models and Surface-Rendering Methods (chapter 10)
• Interactive Input Methods and Graphics User …
Ceg 7470-01: Advanced Wireless Networks, Bin Wang
Ceg 7470-01: Advanced Wireless Networks, Bin Wang
Computer Science & Engineering Syllabi
This course covers advanced topics in wireless networking and mobile computing, including supporting wireless technologies, various types of wireless networks, mesh networks, mobile protocols, mobile security, emerging wireless and mobile technologies, and so on.
Ceg 7200-01: Information Security, Meilin Liu
Ceg 7200-01: Information Security, Meilin Liu
Computer Science & Engineering Syllabi
This course gives a comprehensive study of security vulnerabilities· in information systems and the basic techniques for developing secure applications and practicing safe computing. Topics include: Conventional encryption; Data Encryption Standard; Advanced Encryption Standard; Hashing functions and data integrity; Basic Number Theory; Public-key encryption (RSA); Digital signature; Security standards and applications; Access Control; Management and analysis of security. After taking this course, students will have the knowledge of several well-known security standards and their applications; and the students should be able to increase system security and develop secure applications.
Ceg 7550-01: Computer Vision, Arthur A. Goshtasby
Ceg 7550-01: Computer Vision, Arthur A. Goshtasby
Computer Science & Engineering Syllabi
This course covers basic algorithms for low-level, mid-level, and high-level vision. The algorithms deal with edge detection and image segmentation, feature extraction and matching, and object recognition.
Ceg 7370-01: Distributed Computing, Yong Pei
Ceg 7370-01: Distributed Computing, Yong Pei
Computer Science & Engineering Syllabi
No abstract provided.
A Geo-Ontology Design Pattern For Semantic Trajectories, Yingjie Hu, Krzysztof Janowicz, David Carral, Simon Scheider, Werner Kuhn, Gary Berg-Cross, Pascal Hitzler, Mike Dean, Dave Kolas
A Geo-Ontology Design Pattern For Semantic Trajectories, Yingjie Hu, Krzysztof Janowicz, David Carral, Simon Scheider, Werner Kuhn, Gary Berg-Cross, Pascal Hitzler, Mike Dean, Dave Kolas
Computer Science and Engineering Faculty Publications
Trajectory data have been used in a variety of studies, including human behavior analysis, transportation management, and wildlife tracking. While each study area introduces a different perspective, they share the need to integrate positioning data with domain-specific information. Semantic annotations are necessary to improve discovery, reuse, and integration of trajectory data from different sources. Consequently, it would be beneficial if the common structure encountered in trajectory data could be annotated based on a shared vocabulary, abstracting from domain-specific aspects. Ontology design patterns are an increasingly popular approach to define such flexible and self-contained building blocks of annotations. They appear more …
Scale Reasoning With Fuzzy-El+ Ontologies Based On Mapreduce, Zhangquan Zhou, Guilin Qi, Chang Lui, Pascal Hitzler, Raghava Mutharaju
Scale Reasoning With Fuzzy-El+ Ontologies Based On Mapreduce, Zhangquan Zhou, Guilin Qi, Chang Lui, Pascal Hitzler, Raghava Mutharaju
Computer Science and Engineering Faculty Publications
Fuzzy extension of Description Logics (DLs) allows the formal representation and handling of fuzzy or vague knowledge. In this paper, we consider the problem of reasoning with fuzzy-EL+, which is a fuzzy extension of EL+. We first identify the challenges and present revised completion classification rules for fuzzy-EL+ that can be handled by MapReduce programs. We then propose an algorithm for scale reasoning with fuzzy-EL+ ontologies using MapReduce. Some preliminary experimental results are provided to show the scalability of our algorithm.
Sroiq Syntax Approximation By Using Nominal Schemas, Cong Wang, David Carral, Pascal Hitzler
Sroiq Syntax Approximation By Using Nominal Schemas, Cong Wang, David Carral, Pascal Hitzler
Computer Science and Engineering Faculty Publications
Nominal schemas is a recently introduced extension of description logics which makes it possible to express rules which generalize DL-safe ones. A tractable description logic, ELROVn, has been identified. This leads us to the question: can we improve approximate reasoning results by employing nominal schemas? In this paper, we investigate how to approximately cast SROIQ into ELROVn. Using a datalog-based tractable algorithm, a preliminary evaluation shows that our approach can indeed do approximate SROIQ-reasoning with a high recall.
Cs 7840: Soft Computing, John C. Gallagher
Cs 7840: Soft Computing, John C. Gallagher
Computer Science & Engineering Syllabi
This course explores soft computation from historical, theoretical, and application viewpoints. Soft computing methods to be considered include evolutionary computation, neural computation, fuzzy set theory, and approximate reasoning. Applications to problems in optimization, control, and classification will be presented.