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- Keyword
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- Continuous Query Monitoring (10)
- Spatial Optimization (8)
- Spatial databases (7)
- Road Network Databases (6)
- Others (5)
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- Database Authentication (4)
- Location Privacy (4)
- Query processing (4)
- Location-based services (3)
- Real road networks (3)
- Transportation network (3)
- Air indexes (2)
- Algorithms (2)
- Continuous monitoring (2)
- Preference queries (2)
- Road networks (2)
- Shortest path (2)
- Text filtering (2)
- Text search (2)
- Wireless broadcast (2)
- Authentication in outsourced databases (1)
- Access latency (1)
- Aggregate signature (1)
- Aggregation (1)
- Algorithm performance (1)
- Approximation theory (1)
- Archive (1)
- Arrival rates (1)
- Artificial Intelligence (1)
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Articles 31 - 39 of 39
Full-Text Articles in Physical Sciences and Mathematics
Shortest Path Computation On Air Indexes, Georgios Kellaris, Kyriakos Mouratidis
Shortest Path Computation On Air Indexes, Georgios Kellaris, Kyriakos Mouratidis
Kyriakos MOURATIDIS
Shortest path computation is one of the most common queries in location-based services that involve transportation net- works. Motivated by scalability challenges faced in the mo- bile network industry, we propose adopting the wireless broad- cast model for such location-dependent applications. In this model the data are continuously transmitted on the air, while clients listen to the broadcast and process their queries locally. Although spatial problems have been considered in this environment, there exists no study on shortest path queries in road networks. We develop the rst framework to compute shortest paths on the air, and demonstrate the practicality and …
A Threshold-Based Algorithm For Continuous Monitoring Of K Nearest Neighbors, Kyriakos Mouratidis, Dimitris Papadias, Spiridon Bakiras, Yufei Tao
A Threshold-Based Algorithm For Continuous Monitoring Of K Nearest Neighbors, Kyriakos Mouratidis, Dimitris Papadias, Spiridon Bakiras, Yufei Tao
Kyriakos MOURATIDIS
Assume a set of moving objects and a central server that monitors their positions over time, while processing continuous nearest neighbor queries from geographically distributed clients. In order to always report up-to-date results, the server could constantly obtain the most recent position of all objects. However, this naïve solution requires the transmission of a large number of rapid data streams corresponding to location updates. Intuitively, current information is necessary only for objects that may influence some query result (i.e., they may be included in the nearest neighbor set of some client). Motivated by this observation, we present a threshold-based algorithm …
Preference Queries In Large Multi-Cost Transportation Networks, Kyriakos Mouratidis, Yimin Lin, Man Lung Yiu
Preference Queries In Large Multi-Cost Transportation Networks, Kyriakos Mouratidis, Yimin Lin, Man Lung Yiu
Kyriakos MOURATIDIS
Research on spatial network databases has so far considered that there is a single cost value associated with each road segment of the network. In most real-world situations, however, there may exist multiple cost types involved in transportation decision making. For example, the different costs of a road segment could be its Euclidean length, the driving time, the walking time, possible toll fee, etc. The relative significance of these cost types may vary from user to user. In this paper we consider such multi-cost transportation networks (MCN), where each edge (road segment) is associated with multiple cost values. We formulate …
Virtualisation: A Case Study In Database Administration Laboratory Work, Greg Cranitch, Michael J. Rees
Virtualisation: A Case Study In Database Administration Laboratory Work, Greg Cranitch, Michael J. Rees
Greg Cranitch
This paper discusses the issues involved in using virtual machines to teach database administration concepts and the associated issues in a university student environment. Previous work on using virtual machines in system/network administration university labs is reviewed as well as the use of virtual machines in a database development environment. A virtual machine project for a Virtual Information Technology Teaching Laboratory (VITTL) using central servers offering a potential solution is described. This solution provides a secure environment with each student isolated from others with their own virtual machines.
Expert System For Online Diagnosis Of Red-Eye Diseases, Dr. Muhammad Zubair Asghar, Muhammad Junaid Asghar
Expert System For Online Diagnosis Of Red-Eye Diseases, Dr. Muhammad Zubair Asghar, Muhammad Junaid Asghar
Dr. Muhammad Zubair Asghar
This paper describes Expert System (ES) for online diagnosis and prescription of red-eye diseases. The types of eye diseases that can be diagnosed with this system are called Red-eye diseases i.e. disease in which red-eye is the common symptom. It is rule based web-supported expert system, assisting ophthalmologists, medical students doing specialization in ophthalmology, researchers as well as eye patients having computer know-how. System was designed and programmed with Java Technology. The expert rules were developed on the symptoms of each type of Red-eye disease, and they were presented using tree-graph and inferred using forward-chaining with depth-first search method. User …
Trust Perceptions Of Online Travel Information By Different Content Creators: Some Social And Legal Implications., Stephen Burgess, Carmine Sellitto, Carmen Cox, Jeremy Buultjens
Trust Perceptions Of Online Travel Information By Different Content Creators: Some Social And Legal Implications., Stephen Burgess, Carmine Sellitto, Carmen Cox, Jeremy Buultjens
Carmen Cox
Consumers are increasingly turning to the online environment to provide information to assist them in making purchase decisions related to travel products. They often rely on travel recommendations from different sources, such as sellers, independent experts and, increasingly, other consumers. A new type of online content, user-generated content (UGC), provides a number of legal and social challenges to providers and users of that content, especially in relation to areas such as defamation, misrepresentation and social embarrassment. This paper reports research that examined the level of trustworthiness of online travel information from these different sources. The study used a survey of …
Active Collaboration Learning Environments: The Class Of Web 2.0, Dirk Hovorka, Michael J. Rees
Active Collaboration Learning Environments: The Class Of Web 2.0, Dirk Hovorka, Michael J. Rees
Michael J Rees
The maturity and increased integration of online collaboration, networking, and research tools offer Information Systems faculty opportunities to provide unique learning environments at multiple levels. A growing ensemble of Web 2.0 technologies provide the background to introduce and explore fundamental aspects of information system development, design, application, and use, while simultaneously providing a functional suite of tools which will aid students in other aspects of their university learning. A selection of these technologies and case studies of their classroom usage is discussed. In addition, an agenda for research in both pedagogy and in information systems phenomena is outlined.
Iris : Digital Scholarship, Publishing, And Preservation At Northeastern University, Hillary Corbett
Iris : Digital Scholarship, Publishing, And Preservation At Northeastern University, Hillary Corbett
Hillary Corbett
No abstract provided.
Development And Evaluation Of A Chemistry Educational Software For Learning Organic Reactions Using Qualitative Reasoning, Rukaini Abdullah
Development And Evaluation Of A Chemistry Educational Software For Learning Organic Reactions Using Qualitative Reasoning, Rukaini Abdullah
Rukaini Abdullah
In science education, it is believed that students should understand the qualitative principles that govern the subject including the cause-effect relationships in processes before they are immersed in complex problem solving. Traditional educational programs for teaching organic chemistry do not usually explain or justify an observed chemical phenomenon. These programs do not “explain” simply because the results are obtained through chaining the rules or by searching the reaction routes that have been pre-coded in software. This paper discusses the development techniques, simulation results, and student evaluation of a software tool that aimed to help chemistry students learn organic processes through …