This paper presents a new version of Routes Generation Matrix Algorithm, called Routes Generation Matrix Improved Algorithm (RGMIA), for determining routes with optimal travel time in public transport network. The method was implemented and tested on the real public transport network in Warsaw city. This network was completed with walk links and therefore resultant routes are more practical and...

Dimension reduction techniques have been a successful avenue for automatically extracting the “concepts” underlying unstructured data, a task that naturally arises in fields as diverse as information retrieval, image processing, social science, etc. It is surprising how much can be achieved for this task using only the raw data itself, without resorting to any additional knowledge or intelligen...

The paper proposes a technique based on a combined approach of data mining algorithms and linear programming methods for classifying organizational units, such as research centers. We exploit clustering algorithms for grouping information concerning the scientific activity of research centers. We also show that the replacement of an expensive efficiency measurement, based on the solution of lin...

In the software engineering literature it is commonly believed that economies of scale do not occur in case of software Development and Enhancement Projects (D&EP). Their per-unit cost does not decrease but increases with the growth of such projects product size. Thus this is diseconomies of scale that occur in them. The significance of this phenomenon results from the fact that it is commonly ...

Load testing of IT applications is fraught with the challenges of time to market, quality of results, high cost of commercial tools, and accurately representing production like scenarios. It would help IT projects to be able to test with a small number of users and extrapolate to scenarios with much larger number of users. This in turn will cut down cycle times and costs and allow for a variety...

This paper investigates the composition of search engine results pages. We define what elements the most popular web search engines use on their results pages (e.g., organic results, advertisements, shortcuts) and to which degree they are used for popular vs. rare queries. Therefore, we send 500 queries of both types to the major search engines Google, Yahoo, Live.com and Ask. We count how ofte...

Sponsored search has gained considerable attention in Web searchrelated studies. In this paper, we investigate into the user interaction process on search engine result pages (SERPs) considering the influence of sponsored search results. We integrate different styles of sponsored links into SERPs to systematically study how they affect users’ behavioral preferences. Based on an analysis into us...

The lagging reauthorization of the State Children's Health Insurance Program (SCHIP) affects States' plans for sustaining mature programs. This study used the Consumer Assessment of Healthcare Providers and Systems (CAHPS) program survey in order to assess changes in access and satisfaction for Georgia's SCHIP (PeachCare) and Medicaid children as PeachCare matured 2000 to 2003. Adjusting for fa...

The majority of applications requiring high resolution images to derive and analyze data accurately and easily. Image super resolution is playing an effective role in those applications. Image super resolution is the process of producing high resolution image from low resolution image. In this paper, we study various image super resolution techniques with respect to the quality of results and p...

The data quality of a vector spatial data can be assessed using the data contained within one or more data warehouses. Spatial consistency includes topological consistency, or the conformance to topological rules (Hadzilacos & Tryfona, 1992, Rodríguez, 2005). Detection of inconsistencies in vector spatial data is an important step for improvement of spatial data quality (Redman, 1992; Veregin, ...