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We investigate an efficient parallelization of the most common iterative sparse tensor decomposition algorithms on distributed memory systems. A key operation in each iteration of these algorithms is the matricized tensor times Khatri-Rao product (MTTKRP). This operation amounts to element-wise vector multiplication and reduction depending on the sparsity… (More)

We investigate an efficient parallelization of a class of algorithms for the well-known Tucker decomposition of general N-dimensional sparse tensors. The targeted algorithms are iterative and use the alternating least squares method. At each iteration, for each dimension of an N-dimensional input tensor, the following operations are performed: (i) the… (More)

- Ted E. Senator, Henry G. Goldberg, +31 authors David D. Jensen
- KDD
- 2013

This paper reports on methods and results of an applied research project by a team consisting of SAIC and four universities to develop, integrate, and evaluate new approaches to detect the weak signals characteristic of insider threats on organizations' information systems. Our system combines structural and semantic information from a real corporate… (More)

- Emre Varol, Fazli Can, Cevdet Aykanat, Oguz Kaya
- CIKM
- 2011

We study a generalized version of the near-duplicate detection problem which concerns whether a document is a subset of another document. In text-based applications, document containment can be observed in exact-duplicates, near-duplicates, or containments, where the first two are special cases of the third. We introduce a novel method, called CoDet, which… (More)

A γ-quasi-clique in a simple undirected graph is a set of vertices which induces a subgraph with the edge density of at least γ for 0 < γ < 1. A cover of a graph by γ-quasi-cliques is a set of γ-quasi-cliques where each edge of the graph is contained in at least one quasi-clique. The minimum cover by γ-quasi-cliques problem asks for a γ-quasi-clique cover… (More)

- Oguz Cebesoy, Mustafa Isik, Mehmet Subasi, Abbas Kaya, Fethi Bilgin, Oğuz Kaya
- The American journal of case reports
- 2014

PATIENT
Male, 46 FINAL DIAGNOSIS: Akkaptonuria Symptoms: Hip pain Medication: - Clinical Procedure: Total hip replacement Specialty: Orthopedics and Traumatology.
OBJECTIVE
Unusual or unexpected effect of treatment.
BACKGROUND
Ochronosis is an inherited metabolic disease in which there is an accumulation of excessive amounts of homogentisic acid in the… (More)

- Hatice Solmaz, Mehmet Akbulut, +6 authors Ayhan Uysal
- Clinical and investigative medicine. Médecine…
- 2013

PURPOSE
The purpose of the present study was to evaluate the effects of different loading doses of clopidogrel on ST segment resolution on ECG, changes in cardiac enzyme levels and serum levels of high-sensitivity C-reactive protein (Hs-CRP) in patients with ST elevated myocardial infarction (STEMI) treated with fibrinolytic therapy.
METHODS
Patients… (More)

- Oguz Kaan Kaya, Necati Dagli, +5 authors Orhan Dogdu
- Clinical and investigative medicine. Médecine…
- 2014

PURPOSE
Diastolic heart failure is characterized by the presence of heart failure symptoms despite preserved systolic function. Cytokines released during allergic reactions may impair diastolic heart function, either through their direct toxic effects or by inducing coronary artery spasm. The purpose of this study was to examine the effects of acute… (More)

- OGUZ KAYA, ENVER KAYAASLAN, +5 authors Iain S. Duff
- 2014

We discuss partitioning methods using hypergraphs to produce fill-reducing orderings of sparse matrices for Cholesky, LU and QR factorizations. For the Cholesky factorization, we investigate a recent result on pattern-wise decomposition of sparse matrices, generalize the result, and develop algorithmic tools to obtain more effective ordering methods. The… (More)

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