Search Results - "Sintos, Stavros"
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1
The maximum exposure problem
Published in Computational geometry : theory and applications (01-06-2022)“…Given a set of points P and axis-aligned rectangles R in the plane, a point p∈P is called exposed if it lies outside all rectangles in R. In the max-exposure…”
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Journal Article -
2
JanusAQP: Efficient Partition Tree Maintenance for Dynamic Approximate Query Processing
Published in 2023 IEEE 39th International Conference on Data Engineering (ICDE) (01-04-2023)“…Approximate query processing over dynamic databases, i.e., under insertions/deletions, has applications ranging from high-frequency trading to…”
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Conference Proceeding -
3
Efficient Algorithms for Querying Large and Uncertain Data
Published 01-01-2020“…Query processing is an important problem in many research fields including database systems, data mining, and geometric computing. The goal is to preprocess…”
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Dissertation -
4
Improved Approximation Algorithms for Relational Clustering
Published 27-09-2024“…Clustering plays a crucial role in computer science, facilitating data analysis and problem-solving across numerous fields. By partitioning large datasets into…”
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Journal Article -
5
Durable Top-K Instant-Stamped Temporal Records with User-Specified Scoring Functions
Published in 2021 IEEE 37th International Conference on Data Engineering (ICDE) (01-04-2021)“…A way of finding interesting or exceptional records from instant-stamped temporal data is to consider their "durability, " or, intuitively speaking, how well…”
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Conference Proceeding -
6
Range Entropy Queries and Partitioning
Published 26-12-2023“…ICDT 2024 Data partitioning that maximizes or minimizes Shannon entropy is a crucial subroutine in data compression, columnar storage, and cardinality…”
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Journal Article -
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Finding Smallest Witnesses for Conjunctive Queries
Published 29-11-2023“…A witness is a sub-database that preserves the query results of the original database but of much smaller size. It has wide applications in query rewriting and…”
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Journal Article -
8
A Fair and Memory/Time-efficient Hashmap
Published 21-07-2023“…SIGMOD 2024 Hashmap is a fundamental data structure in computer science. There has been extensive research on constructing hashmaps that minimize the number of…”
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Journal Article -
9
Fair Set Cover
Published 19-05-2024“…The potential harms of algorithmic decisions have ignited algorithmic fairness as a central topic in computer science. One of the fundamental problems in…”
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Journal Article -
10
Faster Algorithms for Fair Max-Min Diversification in $\mathbb{R}^d
Published 06-04-2024“…SIGMOD 2024 The task of extracting a diverse subset from a dataset, often referred to as maximum diversification, plays a pivotal role in various real-world…”
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Journal Article -
11
On Reporting Durable Patterns in Temporal Proximity Graphs
Published 24-03-2024“…PODS 2024 Finding patterns in graphs is a fundamental problem in databases and data mining. In many applications, graphs are temporal and evolve over time, so…”
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Journal Article -
12
Computing Data Distribution from Query Selectivities
Published 11-01-2024“…ICDT 2024 We are given a set $\mathcal{Z}=\{(R_1,s_1),\ldots, (R_n,s_n)\}$, where each $R_i$ is a \emph{range} in $\Re^d$, such as rectangle or ball, and $s_i…”
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Journal Article -
13
JanusAQP: Efficient Partition Tree Maintenance for Dynamic Approximate Query Processing
Published 20-04-2022“…Approximate query processing over dynamic databases, i.e., under insertions/deletions, has applications ranging from high-frequency trading to…”
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Journal Article -
14
Fast Approximation Algorithms for Piercing Boxes by Points
Published 03-11-2023“…$ \newcommand{\Re}{\mathbb{R}} \newcommand{\BX}{\mathcal{B}} \newcommand{\bb}{\mathsf{b}} \newcommand{\eps}{\varepsilon}…”
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Journal Article -
15
The Maximum Exposure Problem
Published 05-02-2021“…Given a set of points $P$ and axis-aligned rectangles $\mathcal{R}$ in the plane, a point $p \in P$ is called \emph{exposed} if it lies outside all rectangles…”
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Journal Article -
16
Selecting Data to Clean for Fact Checking: Minimizing Uncertainty vs. Maximizing Surprise
Published 11-09-2019“…We study the optimization problem of selecting numerical quantities to clean in order to fact-check claims based on such data. Oftentimes, such claims are…”
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Journal Article -
17
Dynamic Enumeration of Similarity Joins
Published 04-05-2021“…This paper considers enumerating answers to similarity-join queries under dynamic updates: Given two sets of $n$ points $A,B$ in $\mathbb{R}^d$, a metric…”
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Journal Article -
18
Combining Aggregation and Sampling (Nearly) Optimally for Approximate Query Processing
Published 29-03-2021“…Sample-based approximate query processing (AQP) suffers from many pitfalls such as the inability to answer very selective queries and unreliable confidence…”
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Journal Article -
19
Durable Top-K Instant-Stamped Temporal Records with User-Specified Scoring Functions
Published 24-02-2021“…A way of finding interesting or exceptional records from instant-stamped temporal data is to consider their "durability," or, intuitively speaking, how well…”
Get full text
Journal Article -
20
Learning to Sample: Counting with Complex Queries
Published 29-12-2019“…We study the problem of efficiently estimating counts for queries involving complex filters, such as user-defined functions, or predicates involving self-joins…”
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Journal Article