User profiles for M. Demirtas

Mahmut Murat Demirtas

- Verified email at sbu.edu.tr - Cited by 1312

Murat Demirtaş

- Verified email at upf.edu - Cited by 1107

Mehmet Demirtaş

- Verified email at gazi.edu.tr - Cited by 1052

[HTML][HTML] The weather research and forecasting model's community variational/ensemble data assimilation system: WRFDA

…, J Bray, Y Chen, M Demirtas… - Bulletin of the …, 2012 - journals.ametsoc.org
Barker, W. Huang, Y.-R. Guo, and A. Bourgeois, 2003: A three-dimensional variational (3DVAR)
data assimilation system for use with MM5. NCAR Tech. Note NCAR/TN-453+ STR, 68 …

[PDF][PDF] Hierarchical heterogeneity across human cortex shapes large-scale neural dynamics

M Demirtaş, JB Burt, M Helmer, JL Ji, BD Adkinson… - Neuron, 2019 - cell.com
The large-scale organization of dynamical neural activity across cortex emerges through
long-range interactions among local circuits. We hypothesized that large-scale dynamics are …

Dynamic functional connectivity reveals altered variability in functional connectivity among patients with major depressive disorder

M Demirtaş, C Tornador, C Falcón… - Human brain …, 2016 - Wiley Online Library
Resting‐state fMRI (RS‐fMRI) has become a useful tool to investigate the connectivity
structure of mental health disorders. In the case of major depressive disorder (MDD), recent …

Superradiance in string theory

VM Mehta, M Demirtas, C Long… - … of Cosmology and …, 2021 - iopscience.iop.org
We perform an extensive analysis of the statistics of axion masses and interactions in
compactifications of type IIB string theory, and we show that black hole superradiance excludes …

Outcomes of mild to moderate functional tricuspid regurgitation in patients undergoing mitral valve operations: a meta-analysis of 2,488 patients

I Kara, C Koksal, A Erkin, H Sacli, M Demirtas… - The Annals of Thoracic …, 2015 - Elsevier
This meta-analysis examined the prognosis of patients who were found to have mild to
moderate functional tricuspid regurgitation during mitral valve operations. Overall, this meta-…

Application of one-axis sun tracking system

I Sefa, M Demirtas, I Çolak - Energy conversion and Management, 2009 - Elsevier
This paper introduces design and application of a novel one-axis sun tracking system which
follows the position of the sun and allows investigating effects of one-axis tracking system …

Cardiac hydatid cysts with intracavitary expansion

M Kaplan, M Demirtas, S Cimen, A Ozler - The Annals of thoracic surgery, 2001 - Elsevier
Background. Hydatid cyst disease is a significant health problem for undeveloped and
developing countries. Although cardiac involvement is rare, early diagnosis and treatment of this …

Small cosmological constants in string theory

M Demirtas, M Kim, L McAllister, J Moritz… - Journal of High Energy …, 2021 - Springer
We construct supersymmetric AdS 4 vacua of type IIB string theory in compactifications on
orientifolds of Calabi-Yau threefold hypersurfaces. We first find explicit orientifolds and …

Vacua with small flux superpotential

M Demirtas, M Kim, L McAllister, J Moritz - Physical Review Letters, 2020 - APS
We describe a method for finding flux vacua of type IIB string theory in which the Gukov-Vafa-Witten
superpotential is exponentially small. We present an example with W 0≈ 2× 10− 8 …

Prosthetic replacement of tricuspid valve: bioprosthetic or mechanical

M Kaplan, MS Kut, MM Demirtas, S Cimen… - The Annals of thoracic …, 2002 - Elsevier
Background. Tricuspid valve replacement is one of the most challenging operations in cardiac
surgery. Selection of the suitable prosthesis is still debatable. Methods. In our institution, …