In today’s Electronic world, there are many devices which connect to one another as well to compu... more In today’s Electronic world, there are many devices which connect to one another as well to computer in a variety of ways: A cable connects a computer's processing unit to a display, a data cable and a docking cradle connect a personal digital assistant (PDA) or a cellular phone to a computer, radio waves connect a cordless phone to its base unit, an infrared beam connects a remote control to a television. The elaborate array of connectors among electronic devices cries out for a better solution. In this fast growing technology world, wireless data transferring in a desired format is essential. Data integrity, data security, cost of hardware and software, and system’s power management capacity is of prime importance for our data acquisition application. With the increasing use of data loggers to collect information in industrial and environmental monitoring applications, has come a corresponding increase in the use of wireless technology to retrieve the information. Secure and r...
2014 17th International Conference on Computer and Information Technology (ICCIT), 2014
Ultrasound strain imaging has great importance as tumor or cancerous tissues are much stiffer tha... more Ultrasound strain imaging has great importance as tumor or cancerous tissues are much stiffer than normal tissues. Estimations of strain calculating the time delays between consecutive ultrasound echo signals are common approaches in quasi-static elastography. Because of the ill posed nature of strain images, the ultrasound strain estimation still remains challenging. In this paper, we present an iterative strain estimator that uses mutual information between stochastic pre and post compressed radio frequency (RF) signals to define time delays. For each RF signal, a past and future is defined by cutting sample sequences into two parts. The time delay is considered to be the time shift between the cutting moments for which the mutual information between both past vectors and future vectors reaches a minimum. Displacement calculation with this time delay provides effective strain estimation for small strains. A synthetic phantom of tissue with tumor is modeled using the finite element method (FEM) and the pre-/post-compressed RF signals are generated using ultrasound simulation package Field II. Using these simulated RF data displacements and strain of deformation are calculated in MATLAB. The Contrast to Noise Ratio (CNR) and Signal to Noise Ratio (SNR) are found better compared to conventional cross-correlation method. This algorithm can detect inclusions having echogenicity very close to that of the surrounding tissues and hence can be useful for detection of tumors or cancers.
An integrated system that is useful for teaching about the methods of industrial process control,... more An integrated system that is useful for teaching about the methods of industrial process control, applications of programmable logic controllers, computer aided simulation of process control systems to test designs and advanced animated graphics for data ...
We report the temperature-dependent resistivity and dielectric function (1 kHz ~ 3 MHz) of a char... more We report the temperature-dependent resistivity and dielectric function (1 kHz ~ 3 MHz) of a charge ordering system La1.5Sr0.5NiO4−δ. The primary data of ac impedance was measured by a four-terminal pair arrangement. Above 180 K, the resistivity is independent of frequency. At lower temperatures, the dielectric function could not be fitted by a Debye model with a single relaxation time, it should have a distribution. At T = 130 K, there is a sudden increase in the ρ – T relation, meanwhile an anomaly dielectric response occurs on the temperature dependant dielectric spectrum in the whole measured frequency range, in which the dielectric constant has a high value even at high frequency region. Our analysis suggests that the current system would be more consistent with the Zener polaron model.
In today’s Electronic world, there are many devices which connect to one another as well to compu... more In today’s Electronic world, there are many devices which connect to one another as well to computer in a variety of ways: A cable connects a computer's processing unit to a display, a data cable and a docking cradle connect a personal digital assistant (PDA) or a cellular phone to a computer, radio waves connect a cordless phone to its base unit, an infrared beam connects a remote control to a television. The elaborate array of connectors among electronic devices cries out for a better solution. In this fast growing technology world, wireless data transferring in a desired format is essential. Data integrity, data security, cost of hardware and software, and system’s power management capacity is of prime importance for our data acquisition application. With the increasing use of data loggers to collect information in industrial and environmental monitoring applications, has come a corresponding increase in the use of wireless technology to retrieve the information. Secure and r...
2014 17th International Conference on Computer and Information Technology (ICCIT), 2014
Ultrasound strain imaging has great importance as tumor or cancerous tissues are much stiffer tha... more Ultrasound strain imaging has great importance as tumor or cancerous tissues are much stiffer than normal tissues. Estimations of strain calculating the time delays between consecutive ultrasound echo signals are common approaches in quasi-static elastography. Because of the ill posed nature of strain images, the ultrasound strain estimation still remains challenging. In this paper, we present an iterative strain estimator that uses mutual information between stochastic pre and post compressed radio frequency (RF) signals to define time delays. For each RF signal, a past and future is defined by cutting sample sequences into two parts. The time delay is considered to be the time shift between the cutting moments for which the mutual information between both past vectors and future vectors reaches a minimum. Displacement calculation with this time delay provides effective strain estimation for small strains. A synthetic phantom of tissue with tumor is modeled using the finite element method (FEM) and the pre-/post-compressed RF signals are generated using ultrasound simulation package Field II. Using these simulated RF data displacements and strain of deformation are calculated in MATLAB. The Contrast to Noise Ratio (CNR) and Signal to Noise Ratio (SNR) are found better compared to conventional cross-correlation method. This algorithm can detect inclusions having echogenicity very close to that of the surrounding tissues and hence can be useful for detection of tumors or cancers.
An integrated system that is useful for teaching about the methods of industrial process control,... more An integrated system that is useful for teaching about the methods of industrial process control, applications of programmable logic controllers, computer aided simulation of process control systems to test designs and advanced animated graphics for data ...
We report the temperature-dependent resistivity and dielectric function (1 kHz ~ 3 MHz) of a char... more We report the temperature-dependent resistivity and dielectric function (1 kHz ~ 3 MHz) of a charge ordering system La1.5Sr0.5NiO4−δ. The primary data of ac impedance was measured by a four-terminal pair arrangement. Above 180 K, the resistivity is independent of frequency. At lower temperatures, the dielectric function could not be fitted by a Debye model with a single relaxation time, it should have a distribution. At T = 130 K, there is a sudden increase in the ρ – T relation, meanwhile an anomaly dielectric response occurs on the temperature dependant dielectric spectrum in the whole measured frequency range, in which the dielectric constant has a high value even at high frequency region. Our analysis suggests that the current system would be more consistent with the Zener polaron model.
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Papers by Akram Hossain