Top-k spatial aware ads (Record no. 427135)
[ view plain ]
| 000 -LEADER | |
|---|---|
| fixed length control field | 02507nam a22002537a 4500 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 230307b |||||||| |||| 00| 0 eng d |
| 041 ## - LANGUAGE CODE | |
| Language code of text/sound track or separate title | en. |
| 082 ## - DEWEY DECIMAL CLASSIFICATION NUMBER | |
| Classification number | 000 |
| Item number | SAV |
| 100 ## - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Savla, Virti |
| 245 ## - TITLE STATEMENT | |
| Title | Top-k spatial aware ads |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) | |
| Place of publication, distribution, etc | Bengaluru : |
| Name of publisher, distributor, etc | Indian Institute of science , |
| Date of publication, distribution, etc | 2022 . |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | 42p. |
| Accompanying material | e-Thesis |
| Other physical details | col. ill. ; |
| Dimensions | 29.1 cm * 20.5 cm |
| Size of unit | 2.507Mb |
| 500 ## - GENERAL NOTE | |
| General note | Include bibliographical references and indexes |
| 502 ## - DISSERTATION NOTE | |
| Dissertation note | MTech (Res); 2022; Computer science and automation |
| 520 ## - SUMMARY, ETC. | |
| Summary, etc | Consider an app on a smartphone which displays local business ads. When a user opens the app, then k local business ads need to displayed (where k would typically be 3 or 5) such that the profit made by the app is maximized. The pricing model needs to take into account that (a) each business is willing to bid a different price, and (b) farther the distance of the user on whose smartphone the ad is displayed, the lesser is the price paid by to the app. Motivated by such applications, in this work, we design fast algorithms to retrieve top-k objects using the provided spatial and non-spatial attributes. We refer them as Top-k Spatial Aware Ads Queries (SAA). In Top-k-Saa, the query is user location and we return top-k objects that have the best score. The scoring function is based on the distance between the object and query point (spatial attribute) and non-spatial attributes. We propose algorithms that efficiently preprocess the data using appropriate data structures and aid in fast query processing. A simple O(n log k) algorithm returns the top-k ads based on the scoring function value. We obtain the following results. 1. Our first algorithm uses O(n log n) space and answers the Top-k-Saa query in O(k log2 n) time. The fast query time is obtained by leveraging the properties of additively weighted Voronoi diagram, along with other supporting data structures. 2. Our second algorithm improves upon the first algorithm by improving the query time to O(k log n) in expectation, while using the same space. This is achieved via an interesting combination of randomization with a “top-2” structure. |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name as entry element | Computational Geometry, Voronoi Diagram, Additively Weighted Voronoi Diagram, Spatial Queries |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name as entry element | Computational Geometry |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name as entry element | Voronoi Diagram |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name as entry element | Additively Weighted Voronoi Diagram |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name as entry element | Spatial Queries |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Saladi, Rahul advised |
| 856 ## - ELECTRONIC LOCATION AND ACCESS | |
| Uniform Resource Identifier | https://etd.iisc.ac.in/handle/2005/6026 |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Koha item type | Thesis |
| Withdrawn status | Lost status | Source of classification or shelving scheme | Damaged status | Not for loan | Home library | Current library | Date acquired | Total Checkouts | Barcode | Date last seen | Koha item type |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Dewey Decimal Classification | JRD Tata Memorial Library | JRD Tata Memorial Library | 07/03/2023 | ET00040 | 07/03/2023 | E-BOOKS |
