Hasan Mutlu Çelik - Academia.edu (original) (raw)
Papers by Hasan Mutlu Çelik
Energies, 2021
In this study, heat transfer in a square cavity filled with a Phase Change Material (PCM) under a... more In this study, heat transfer in a square cavity filled with a Phase Change Material (PCM) under a sinusoidal wall temperature during solidification and melting is analyzed. All surfaces of the cavity are insulated except one surface, which is under the sinusoidal temperature change. The governing equations and boundary conditions are made dimensionless to reduce the number of governing parameters into two as dimensionless frequency and Stefan number. The governing equations were solved numerically by using Finite Volume Method for a wide range of Stefan number (0.1 < Ste < 1.0) and dimensionless frequency (0.23 < ω* < 2.04). Based on the obtained results, a chart in terms of Stefan number and dimensionless frequency is obtained to divide the heat transfer process in the cavity into three regions as uncompleted, completed, and overheated phase-change processes. For the uncompleted process, some parts of the cavity are inactive, and no phase change occurs in those parts of...
Journal of Ambient Intelligence and Smart Environments, 2011
... Hasan Celika,*, Alan Hanjalica and Emile A. Hendriksb a Delft University of Technology, Multi... more ... Hasan Celika,*, Alan Hanjalica and Emile A. Hendriksb a Delft University of Technology, Multimedia Information Retrieval Lab, Mekelweg 4, 2628 CD, Delft ... The rele-vance of this information is based on the assumption that dominant objects in a scene are often also typical ...
The Journal of Spinal Cord Medicine, 2010
2009 IEEE International Conference on Acoustics, Speech and Signal Processing, 2009
2008 Ninth International Workshop on Image Analysis for Multimedia Interactive Services, 2008
2008 IEEE Computer Society Conference on Computer Vision and Pattern Recognition Workshops, 2008
International Journal of Neuroscience, 2010
Traumatic injury to the central nervous system results in the delayed dysfunction and neuronal de... more Traumatic injury to the central nervous system results in the delayed dysfunction and neuronal death. Impaired mitochondrial function, generation of reactive oxygen species (ROS), and lipid peroxidation occur soon after traumatic spinal cord injury (SCI), while the activation of compensatory molecules that neutralize ROS occurs at later time points. The aim of the current study was to investigate the putative neuroprotective effect of the COX2 inhibitor meloxicam in a rat model of SCI. In order to induce SCI, a standard weight-drop method that induced a moderately severe injury (100 g/cm force) at T10, was used. Injured animals were given either 2 mg/kg meloxicam or saline 30 min postinjury by intraperitoneal injection. At seven days postinjury, neurological examination was performed and rats were decapitated. Spinal cord samples were taken for histological examination or determination of malondialdehyde (MDA) and glutathione (GSH) levels, myeloperoxidase (MPO) activity and DNA fragmentation. Formation of ROS in spinal cord tissue samples was monitored by using a chemiluminescence (CL) technique. SCI caused a significant decrease in spinal cord GSH content, which was accompanied with significant increases in CL, MDA levels, MPO activity, and DNA damage. On the other hand, meloxicam treatment reversed all these biochemical parameters as well as SCI-induced histopathological alterations. Furthermore, impairment of the neurological functions due to SCI was improved by meloxicam treatment. The present study suggests that meloxicam, reduces SCI-induced oxidative stress and exerts neuroprotection by inhibiting lipid peroxidation, GSH depletion, and DNA fragmentation.
2006 International Conference on Image Processing, 2006
Laser Technology for Defense and Security IX, 2013
Contemporary operating environment requires a wide range of tools to respond to a myriad of regul... more Contemporary operating environment requires a wide range of tools to respond to a myriad of regular and irregular threats. Accordingly, conventional weapons do not suffice in some cases. As technology improves exponentially, the dominance of conventional weapons is slowly fading away by the advances in laser technology. This study first outlines the characteristics of laser weapons, then provides the military applications of them in land, maritime, air and space domains and finally exhibits implications for battlefield functions. This study concludes that any country that is seeking primacy in military terms must allocate extra time and resources to obtain this emerging technology. Since it seems that there are not adequate studies about the military applications and operational concepts of the laser weapons, this study tries to increase awareness about their potential advantages.
Scientia Horticulturae, 2007
... that analysis of isoenzymes, especially peroxidases, and protein spectra between rootstock an... more ... that analysis of isoenzymes, especially peroxidases, and protein spectra between rootstock and scion before grafting could be used to predict intraspecific compatibility or incompatibility ([Copes, 1973], [Tubbs, 1973], [Schmid and Feucht, 1985], [Moreno et al., 1994], [Gülen et al ...
Advanced Video and Signal Based Surveillance, 2007
Object detection is a crucial step in automating monitoring and surveillance. A classical approac... more Object detection is a crucial step in automating monitoring and surveillance. A classical approach to object detection employs supervised learning methods, which are effective in well-defined narrow application scopes. In this paper we propose a framework for detecting moving objects in video, which first learns autonomously and on-line the characteristic features of typical object appearances at various parts of the
IEEE Transactions on Control Systems Technology, 2011
... comparison, if the behavior of the constant high gain method is considered, at maximum, can .... more ... comparison, if the behavior of the constant high gain method is considered, at maximum, can ... To further develop this promising method, theoretical investi-gations about stability and systematic control design ... [17] HAF Mohamed, SS Yang, and M. Moghavvemi, Design and real ...
Genome, 2006
The Anatolian region of modern-day Turkey is believed to have played an important role in the his... more The Anatolian region of modern-day Turkey is believed to have played an important role in the history of grapevine (Vitis vinifera L.) domestication and spread. Despite this, the rich grape germplasm of this region is virtually uncharacterized genetically. In this study, the amplified fragment length polymorphisms (AFLP)-based genetic relations of the grapevine accessions belonging to the 2 economically important Anatolian table grape varietal groups known as V. vinifera 'Misket' (Muscat) and V. vinifera 'Parmak' were studied. Thirteen AFLP primer combinations used in the analyses revealed a total of 1495 (35.5% polymorphic) and 1567 (34.6% polymorphic) DNA fragments for the 'Misket' and 'Parmak' varietal groups, respectively. The unweighted pair-group method with arthimetic averaging (UPGMA) cluster analysis and principal coordinate analysis (PCA) conducted on polymorphic AFLP markers showed that both varietal groups contain a number of synonymous (s...
European Archives of Oto-Rhino-Laryngology, 2008
Computer Vision and Image Understanding, 2009
Proceedings of the International Conference on Methods and Techniques in Behavioral Research, Aug 1, 2005
The evolution of storage capacity, computation power and connectivity in Consumer-Electronics (CE... more The evolution of storage capacity, computation power and connectivity in Consumer-Electronics (CE)-, in-vehicle-, medical-IT-and on-chip-networks allow the easy implementation of grid-computing-based real-time and distributed face-related analysis systems. A combination of facial-related analysis components-Service Units (SUs)–such as face detection, pose estimation, face tracking and facial feature localization provide a necessary set of basic visual descriptors required for advanced facialand human-related ...
Magnetic Resonance in Medicine, 2014
Energies, 2021
In this study, heat transfer in a square cavity filled with a Phase Change Material (PCM) under a... more In this study, heat transfer in a square cavity filled with a Phase Change Material (PCM) under a sinusoidal wall temperature during solidification and melting is analyzed. All surfaces of the cavity are insulated except one surface, which is under the sinusoidal temperature change. The governing equations and boundary conditions are made dimensionless to reduce the number of governing parameters into two as dimensionless frequency and Stefan number. The governing equations were solved numerically by using Finite Volume Method for a wide range of Stefan number (0.1 < Ste < 1.0) and dimensionless frequency (0.23 < ω* < 2.04). Based on the obtained results, a chart in terms of Stefan number and dimensionless frequency is obtained to divide the heat transfer process in the cavity into three regions as uncompleted, completed, and overheated phase-change processes. For the uncompleted process, some parts of the cavity are inactive, and no phase change occurs in those parts of...
Journal of Ambient Intelligence and Smart Environments, 2011
... Hasan Celika,*, Alan Hanjalica and Emile A. Hendriksb a Delft University of Technology, Multi... more ... Hasan Celika,*, Alan Hanjalica and Emile A. Hendriksb a Delft University of Technology, Multimedia Information Retrieval Lab, Mekelweg 4, 2628 CD, Delft ... The rele-vance of this information is based on the assumption that dominant objects in a scene are often also typical ...
The Journal of Spinal Cord Medicine, 2010
2009 IEEE International Conference on Acoustics, Speech and Signal Processing, 2009
2008 Ninth International Workshop on Image Analysis for Multimedia Interactive Services, 2008
2008 IEEE Computer Society Conference on Computer Vision and Pattern Recognition Workshops, 2008
International Journal of Neuroscience, 2010
Traumatic injury to the central nervous system results in the delayed dysfunction and neuronal de... more Traumatic injury to the central nervous system results in the delayed dysfunction and neuronal death. Impaired mitochondrial function, generation of reactive oxygen species (ROS), and lipid peroxidation occur soon after traumatic spinal cord injury (SCI), while the activation of compensatory molecules that neutralize ROS occurs at later time points. The aim of the current study was to investigate the putative neuroprotective effect of the COX2 inhibitor meloxicam in a rat model of SCI. In order to induce SCI, a standard weight-drop method that induced a moderately severe injury (100 g/cm force) at T10, was used. Injured animals were given either 2 mg/kg meloxicam or saline 30 min postinjury by intraperitoneal injection. At seven days postinjury, neurological examination was performed and rats were decapitated. Spinal cord samples were taken for histological examination or determination of malondialdehyde (MDA) and glutathione (GSH) levels, myeloperoxidase (MPO) activity and DNA fragmentation. Formation of ROS in spinal cord tissue samples was monitored by using a chemiluminescence (CL) technique. SCI caused a significant decrease in spinal cord GSH content, which was accompanied with significant increases in CL, MDA levels, MPO activity, and DNA damage. On the other hand, meloxicam treatment reversed all these biochemical parameters as well as SCI-induced histopathological alterations. Furthermore, impairment of the neurological functions due to SCI was improved by meloxicam treatment. The present study suggests that meloxicam, reduces SCI-induced oxidative stress and exerts neuroprotection by inhibiting lipid peroxidation, GSH depletion, and DNA fragmentation.
2006 International Conference on Image Processing, 2006
Laser Technology for Defense and Security IX, 2013
Contemporary operating environment requires a wide range of tools to respond to a myriad of regul... more Contemporary operating environment requires a wide range of tools to respond to a myriad of regular and irregular threats. Accordingly, conventional weapons do not suffice in some cases. As technology improves exponentially, the dominance of conventional weapons is slowly fading away by the advances in laser technology. This study first outlines the characteristics of laser weapons, then provides the military applications of them in land, maritime, air and space domains and finally exhibits implications for battlefield functions. This study concludes that any country that is seeking primacy in military terms must allocate extra time and resources to obtain this emerging technology. Since it seems that there are not adequate studies about the military applications and operational concepts of the laser weapons, this study tries to increase awareness about their potential advantages.
Scientia Horticulturae, 2007
... that analysis of isoenzymes, especially peroxidases, and protein spectra between rootstock an... more ... that analysis of isoenzymes, especially peroxidases, and protein spectra between rootstock and scion before grafting could be used to predict intraspecific compatibility or incompatibility ([Copes, 1973], [Tubbs, 1973], [Schmid and Feucht, 1985], [Moreno et al., 1994], [Gülen et al ...
Advanced Video and Signal Based Surveillance, 2007
Object detection is a crucial step in automating monitoring and surveillance. A classical approac... more Object detection is a crucial step in automating monitoring and surveillance. A classical approach to object detection employs supervised learning methods, which are effective in well-defined narrow application scopes. In this paper we propose a framework for detecting moving objects in video, which first learns autonomously and on-line the characteristic features of typical object appearances at various parts of the
IEEE Transactions on Control Systems Technology, 2011
... comparison, if the behavior of the constant high gain method is considered, at maximum, can .... more ... comparison, if the behavior of the constant high gain method is considered, at maximum, can ... To further develop this promising method, theoretical investi-gations about stability and systematic control design ... [17] HAF Mohamed, SS Yang, and M. Moghavvemi, Design and real ...
Genome, 2006
The Anatolian region of modern-day Turkey is believed to have played an important role in the his... more The Anatolian region of modern-day Turkey is believed to have played an important role in the history of grapevine (Vitis vinifera L.) domestication and spread. Despite this, the rich grape germplasm of this region is virtually uncharacterized genetically. In this study, the amplified fragment length polymorphisms (AFLP)-based genetic relations of the grapevine accessions belonging to the 2 economically important Anatolian table grape varietal groups known as V. vinifera 'Misket' (Muscat) and V. vinifera 'Parmak' were studied. Thirteen AFLP primer combinations used in the analyses revealed a total of 1495 (35.5% polymorphic) and 1567 (34.6% polymorphic) DNA fragments for the 'Misket' and 'Parmak' varietal groups, respectively. The unweighted pair-group method with arthimetic averaging (UPGMA) cluster analysis and principal coordinate analysis (PCA) conducted on polymorphic AFLP markers showed that both varietal groups contain a number of synonymous (s...
European Archives of Oto-Rhino-Laryngology, 2008
Computer Vision and Image Understanding, 2009
Proceedings of the International Conference on Methods and Techniques in Behavioral Research, Aug 1, 2005
The evolution of storage capacity, computation power and connectivity in Consumer-Electronics (CE... more The evolution of storage capacity, computation power and connectivity in Consumer-Electronics (CE)-, in-vehicle-, medical-IT-and on-chip-networks allow the easy implementation of grid-computing-based real-time and distributed face-related analysis systems. A combination of facial-related analysis components-Service Units (SUs)–such as face detection, pose estimation, face tracking and facial feature localization provide a necessary set of basic visual descriptors required for advanced facialand human-related ...
Magnetic Resonance in Medicine, 2014