Premature Ventricular Contraction (PVC) can occur in healthy people of any age and is linked to m... more Premature Ventricular Contraction (PVC) can occur in healthy people of any age and is linked to mortality when associated with myocardial infarction. There has been voluminous research that focuses on PVC detection. However, pre-processing techniques such as wavelet filtering may cause delay by extracting features on frequency domain rather than time domain. Furthermore, many classifiers are only suitable for powerful
With the advent of high-speed internet band-width consuming video conferencing applications will ... more With the advent of high-speed internet band-width consuming video conferencing applications will rapidly become attractive to e-patients seeking real-time video consultations from e-doctors. In a conventional system patients connect to a known server in a medical center of his choice. If the server (i.e. a server via which a medical consultant communicates with a patient) is busy, the patient must wait before the server becomes free. Such a system is not efficient as many patients in medical centers with busy servers may either have to wait long, or are simply turned away. Patients may also leave when they become impatient. Not only the patients suffer due to server unavailability, medical service providers also incur revenue losses due to lost patients. To counter these problems, we propose a distributed cooperative Video Consultation on Demand (VCoD) system where servers are located in many different medical centers in different neighbourhoods close to patient concentrations. In such a cooperative system if patients find their nearby servers under heavy load they are automatically directed to servers that are least loaded by using efficient server selection method (also called anycasting). Simple numerical analysis shows that this not only maximizes revenues for medical service providers by reducing number of lost patients, but also improves average response time for e-patients.
AbstractIn this paper, the application of data mining techniques on polynomial based approach fo... more AbstractIn this paper, the application of data mining techniques on polynomial based approach for better electrocardiogram (ECG) authentication mechanism is presented. Polynomials being used for ECG data processing have a history of nearly two decades. ...
American Journal of Physiology Heart and Circulatory Physiology, Jun 1, 1990
We studied the effects of stimulation of the vagal and sympathetic cardiac nerves on left ventric... more We studied the effects of stimulation of the vagal and sympathetic cardiac nerves on left ventricular contraction and relaxation in 16 anesthetized dogs. In each experiment, we paced the ventricles at a fixed rate of 120 beats/min, and we kept the systemic arterial pressure constant. We used the maximum rates of left ventricular pressure rise (dP/dtmax) and fall (dP/dtmin) as our indexes of ventricular contraction and relaxation. Sympathetic nerve stimulation at a frequency of 6 Hz increased dP/dtmax by 802 mmHg/s and raised dP/dtmin by 847 mmHg/s above the control level. The effect of vagal nerve stimulation was directly dependent on the level of sympathetic stimulation. In the absence of sympathetic stimulation, vagal nerve stimulation at a frequency of 5 Hz decreased dP/dtmax by 187 mmHg/s and reduced dP/dtmin by 199 mmHg/s below the control level. When the sympathetic stimulation was 6 Hz, vagal nerve stimulation at 5 Hz decreased dP/dtmax by 513 mmHg/s and reduced dP/dtmin by 709 mmHg/s. Furthermore, propranolol, in doses of 1.5 mg/kg, abolished any significant vagal effect on ventricular contraction or relaxation. We conclude that combined sympathetic-vagal stimulation results in a substantial antagonistic interaction such that vagal stimulation significantly attenuates the sympathetic enhancement of left ventricular function.
A method for analyzing the nonadiabatic viscous flow through turbomachine rotors is presented. Th... more A method for analyzing the nonadiabatic viscous flow through turbomachine rotors is presented. The field analysis is based upon the numerical integration of the full incompressible Navier-Stokes equations, together with the energy equation, over the rotor blade-to-blade stream channels. The numerical code used to solve the governing equations, employs a nonorthogonal boundary-fitted coordinate system that suits the most complicated blade geometries. The effects of turbulence are modeled with a two-equation turbulence model, one expressing the development of the turbulent kinetic energy, and the other its dissipation rate. An Alternating-Direction-Implicit method is used to carry out the necessary numerical integration of the elliptic governing equations. The method of analysis is applied to various types of turbomachine rotors.
Background: Malnutrition causes high childhood mortality that can be reduced by evaluating metabo... more Background: Malnutrition causes high childhood mortality that can be reduced by evaluating metabolic changes during treatment. Phosphorus metabolism is inadequately studied in severely malnourished Bangladeshi children. Objective: To determine the effect of enteral feeding on serum phosphorus concentration in severely malnourished children. Methodology: This hospital based prospective study was conducted in the Paediatric inpatient departments of BSMMU and Ad-din Hospital,
Journal of Network and Computer Applications, 2011
Adoption of compression technology is often required for wireless cardiovascular monitoring, due ... more Adoption of compression technology is often required for wireless cardiovascular monitoring, due to the enormous size of electrocardiogram (ECG) signal and limited bandwidth of Internet. However, compressed ECG must be decompressed before performing human identification using present research on ECG based biometric techniques. This additional step of decompression creates a significant processing delay for identification task. This becomes an obvious
The IEEE Conference on Local Computer Networks 30th Anniversary (LCN'05)l, 2005
A new adaptive gossip-based membership management algorithm is proposed. Its adaptive nature enab... more A new adaptive gossip-based membership management algorithm is proposed. Its adaptive nature enables it to con-fine the control overhead to local ranges, and adapt to the ever-changing network traffic conditions and group mem-bership. The random nature of the algorithm ...
Proceedings of the 1993 ACM/IEEE conference on Supercomputing - Supercomputing '93, 1993
For MPP's to solve new and interesting problems,... more For MPP's to solve new and interesting problems,they must support the development of sophisticated algorithmson very large data sets. Successful developmentdepends strongly on the speed of the execute-fixcycle. Sequential machines cannot provide sufficientlyfast execution of large problems, but many programmingsystems available on MPP's today neglect thesignificance of time spent fixing an algorithm duringdevelopment. Those systems which do address thefix time
NOMS 2002. IEEE/IFIP Network Operations and Management Symposium. ' Management Solutions for the New Communications World'(Cat. No.02CH37327), 2002
With the increasing complexity of network management activities due to naturally limited human in... more With the increasing complexity of network management activities due to naturally limited human involvement, carriers and service providers are looking to migrate from manual, static provisioning models to the more dynamic service-oriented automated provisioning models to meet ...
Premature Ventricular Contraction (PVC) can occur in healthy people of any age and is linked to m... more Premature Ventricular Contraction (PVC) can occur in healthy people of any age and is linked to mortality when associated with myocardial infarction. There has been voluminous research that focuses on PVC detection. However, pre-processing techniques such as wavelet filtering may cause delay by extracting features on frequency domain rather than time domain. Furthermore, many classifiers are only suitable for powerful
With the advent of high-speed internet band-width consuming video conferencing applications will ... more With the advent of high-speed internet band-width consuming video conferencing applications will rapidly become attractive to e-patients seeking real-time video consultations from e-doctors. In a conventional system patients connect to a known server in a medical center of his choice. If the server (i.e. a server via which a medical consultant communicates with a patient) is busy, the patient must wait before the server becomes free. Such a system is not efficient as many patients in medical centers with busy servers may either have to wait long, or are simply turned away. Patients may also leave when they become impatient. Not only the patients suffer due to server unavailability, medical service providers also incur revenue losses due to lost patients. To counter these problems, we propose a distributed cooperative Video Consultation on Demand (VCoD) system where servers are located in many different medical centers in different neighbourhoods close to patient concentrations. In such a cooperative system if patients find their nearby servers under heavy load they are automatically directed to servers that are least loaded by using efficient server selection method (also called anycasting). Simple numerical analysis shows that this not only maximizes revenues for medical service providers by reducing number of lost patients, but also improves average response time for e-patients.
AbstractIn this paper, the application of data mining techniques on polynomial based approach fo... more AbstractIn this paper, the application of data mining techniques on polynomial based approach for better electrocardiogram (ECG) authentication mechanism is presented. Polynomials being used for ECG data processing have a history of nearly two decades. ...
American Journal of Physiology Heart and Circulatory Physiology, Jun 1, 1990
We studied the effects of stimulation of the vagal and sympathetic cardiac nerves on left ventric... more We studied the effects of stimulation of the vagal and sympathetic cardiac nerves on left ventricular contraction and relaxation in 16 anesthetized dogs. In each experiment, we paced the ventricles at a fixed rate of 120 beats/min, and we kept the systemic arterial pressure constant. We used the maximum rates of left ventricular pressure rise (dP/dtmax) and fall (dP/dtmin) as our indexes of ventricular contraction and relaxation. Sympathetic nerve stimulation at a frequency of 6 Hz increased dP/dtmax by 802 mmHg/s and raised dP/dtmin by 847 mmHg/s above the control level. The effect of vagal nerve stimulation was directly dependent on the level of sympathetic stimulation. In the absence of sympathetic stimulation, vagal nerve stimulation at a frequency of 5 Hz decreased dP/dtmax by 187 mmHg/s and reduced dP/dtmin by 199 mmHg/s below the control level. When the sympathetic stimulation was 6 Hz, vagal nerve stimulation at 5 Hz decreased dP/dtmax by 513 mmHg/s and reduced dP/dtmin by 709 mmHg/s. Furthermore, propranolol, in doses of 1.5 mg/kg, abolished any significant vagal effect on ventricular contraction or relaxation. We conclude that combined sympathetic-vagal stimulation results in a substantial antagonistic interaction such that vagal stimulation significantly attenuates the sympathetic enhancement of left ventricular function.
A method for analyzing the nonadiabatic viscous flow through turbomachine rotors is presented. Th... more A method for analyzing the nonadiabatic viscous flow through turbomachine rotors is presented. The field analysis is based upon the numerical integration of the full incompressible Navier-Stokes equations, together with the energy equation, over the rotor blade-to-blade stream channels. The numerical code used to solve the governing equations, employs a nonorthogonal boundary-fitted coordinate system that suits the most complicated blade geometries. The effects of turbulence are modeled with a two-equation turbulence model, one expressing the development of the turbulent kinetic energy, and the other its dissipation rate. An Alternating-Direction-Implicit method is used to carry out the necessary numerical integration of the elliptic governing equations. The method of analysis is applied to various types of turbomachine rotors.
Background: Malnutrition causes high childhood mortality that can be reduced by evaluating metabo... more Background: Malnutrition causes high childhood mortality that can be reduced by evaluating metabolic changes during treatment. Phosphorus metabolism is inadequately studied in severely malnourished Bangladeshi children. Objective: To determine the effect of enteral feeding on serum phosphorus concentration in severely malnourished children. Methodology: This hospital based prospective study was conducted in the Paediatric inpatient departments of BSMMU and Ad-din Hospital,
Journal of Network and Computer Applications, 2011
Adoption of compression technology is often required for wireless cardiovascular monitoring, due ... more Adoption of compression technology is often required for wireless cardiovascular monitoring, due to the enormous size of electrocardiogram (ECG) signal and limited bandwidth of Internet. However, compressed ECG must be decompressed before performing human identification using present research on ECG based biometric techniques. This additional step of decompression creates a significant processing delay for identification task. This becomes an obvious
The IEEE Conference on Local Computer Networks 30th Anniversary (LCN'05)l, 2005
A new adaptive gossip-based membership management algorithm is proposed. Its adaptive nature enab... more A new adaptive gossip-based membership management algorithm is proposed. Its adaptive nature enables it to con-fine the control overhead to local ranges, and adapt to the ever-changing network traffic conditions and group mem-bership. The random nature of the algorithm ...
Proceedings of the 1993 ACM/IEEE conference on Supercomputing - Supercomputing '93, 1993
For MPP's to solve new and interesting problems,... more For MPP's to solve new and interesting problems,they must support the development of sophisticated algorithmson very large data sets. Successful developmentdepends strongly on the speed of the execute-fixcycle. Sequential machines cannot provide sufficientlyfast execution of large problems, but many programmingsystems available on MPP's today neglect thesignificance of time spent fixing an algorithm duringdevelopment. Those systems which do address thefix time
NOMS 2002. IEEE/IFIP Network Operations and Management Symposium. ' Management Solutions for the New Communications World'(Cat. No.02CH37327), 2002
With the increasing complexity of network management activities due to naturally limited human in... more With the increasing complexity of network management activities due to naturally limited human involvement, carriers and service providers are looking to migrate from manual, static provisioning models to the more dynamic service-oriented automated provisioning models to meet ...
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Papers by Ibrahim Khalil