Algorithms and Data Compression

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• ARİF GÜLTEN

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• AKIN ÖZÇİFT

The class imbalance problem has been known to hinder the learning performance of classification algorithms. Various real-world classification tasks such as text categorization suffer from this phenomenon. We demonstrate that active learning is capable of solving the problem.

For the first time Boolean functions on 9 variables having nonlinearity$241$are discovered, that remained as an open question in literature for almost three decades. Such functions are found by heuristic search in the space of rotation symmetric Boolean functions (RSBFs). This shows that there exist Boolean functions…

• SELÇUK KAVUT

MOTIVATION: The high throughput sequencing (HTS) platforms generate unprecedented amounts of data that introduce challenges for the computational infrastructure. Data management, storage and analysis have become major logistical obstacles for those adopting the new platforms. The requirement for large investment for t…

• CAN ALKAN

Background \nSeed location filtering is critical in DNA read mapping, a process where billions of DNA fragments (reads) sampled from a donor are mapped onto a reference genome to identify genomic variants of the donor. State-of-the-art read mappers 1) quickly generate possible mapping locations for seeds (i.e., smalle…

With the introduction of next-generation sequencing (NGS) technologies, we are facing an exponential increase in the amount of genomic sequence data. The success of all medical and genetic applications of next-generation sequencing critically depends on the existence of computational techniques that can process and an…

• CAN ALKAN

Retrieval(IR) systems exploit user feedback by generating an optimal query with respect to a particular information need.Since obtaining an optimal query is an expensive process, the need for mechanisms to save and reuse past optimal queries for future queries is obvions.In this article, we propose the use of a query…

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This paper considers the problem of constructing an efficient inverted index for the spoken term detection (STD) task. More specifically, we construct a deterministic weighted finite-state transducer storing soft-hits in the form of (utterance ID, start time, end time, posterior score) quadruplets. We propose a genera…

• MURAT SARAÇLAR

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• CAN ALKAN

Periodic pattern mining or periodicity detection has a number of applications, such as prediction, forecasting, detection of unusual activities, etc. The problem is not trivial because the data to be analyzed are mostly noisy and different periodicity types (namely symbol, sequence, and segment) are to be investigated…

• REDA ALHAJJ