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In this paper we investigate a new subset of delivery problems where the destinations are all to be delivered from one or more sources so that the total distance is minimized. For example, food is delivered for the customers who place orders from one or more restaurants. For one source, we propose and compare three greedy algorithms namely nearest neighbor first (NNF), polar angle sweep (PAS), and...
Recommendation Systems (RS) can offer suggestions of items to users. Due to explosive growth of internet, e-commerce, and social networks, RS research has experienced great interest in recent years. Online Analytical Processing (OLAP) and data warehousing technologies have existed for a while and have been popular in many big businesses. In this paper we proposed a new RS system called RS-OLAP which...
We focus on the problem of scalable shortest path analytics for large social graphs in this paper. While shortest path distance problem has been investigated extensively, massive graphs on social networks such as Facebook and Linked In call for reinvestigation of the problem due to the requirements of scalability and suitability for distributed computing. We propose a core-net based approach to address...
Cloud Computing is a paradigm in which data, applications or software are accessed over a network. This network of servers is called as “Cloud”. Using a client such as desktops, entertainment centers, tablet computers, notebooks, wall computers, handhelds etc, users can reach into the cloud for resources as they need them. Cloud computing is on-demand access to virtualized IT resources that are housed...
In 2006 and 2007, daily exposures to nitrogen dioxide were monitored in four groups of residents, including office workers, schoolchildren, taxi drivers and teachers. A total of 126 24-hour samples of personal NO2 exposure were collected with passive diffusion samplers. The results show that the average NO2 exposure is 0.049 mg/m3 overall. 11.9% of samples exceeded the national annual guideline standard,...
Keys are character based tools for plant identification. They are based on the decomposition of the plant into very small, atomistic parts. These parts are described with the technical and often arcane terminology of plant taxonomy. Even the best electronic keys (Delta, Lucid) make use of this terminology. Keys are not based on pattern recognition, the forte of visual experts. Instead they demand...
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