Stroke is the third leading cause of death and the most prevalent disabling neurologic disease. U... more Stroke is the third leading cause of death and the most prevalent disabling neurologic disease. Urinary albumin creatinine (UACR) ratio in spot urine sample can be assessed as an early predictive factor for stroke risk determination. A cross sectional study was performed on 117 patients with stroke as case at Chittagong Medical College Hospital, Bangladesh and 117 individuals of their relatives and/or accompanying family members without history of cardiovascular disease as healthy control. Spot urine samples were obtained from both groups and urinary creatinine and albumin were measured. Mean values for urinary albumincreatinine ratio were higher in the case group compared to healthy controls. There was a significant correlation between urinary albumin creatinine ratio and stroke event (P = 0.001). UACR were also found higher among the patients who had different risk factors of stroke like DM, hypertension, and ischemic heart disease. There is positive correlation between urine albu...
Wireless transmission is affected by fading and interference effects which can be combated with e... more Wireless transmission is affected by fading and interference effects which can be combated with equalizer. The use of MIMO system promises good improvement in terms of spectral efficiency, link reliability and Signal to Noise Ratio (SNR). The effect of fading and interference always causes an issue for signal recovery in wireless communication. Equalization compensates for Inter-Symbol Interference (ISI) created by multipath within time dispersive channels. This paper analyzes the performance of Zero forcing method for MIMO wireless channels. The simulation results are obtained using MATLAB. The Bit Error Rate (BER) characteristics for the various transmitting and receiving antenna simulates in MATLAB and describes many advantages and disadvantages of the system. The simulation results show that the equalizer based zero forcing receivers is good for noise free channel and is successful in removing ISI.
Background: There is evidence that oxidative stress plays an important role in autoimmune disease... more Background: There is evidence that oxidative stress plays an important role in autoimmune diseases, such as rheumatoid arthritis (RA). Despite the supporting evidence for a beneficial effect of antioxidants on clinical characteristics of RA, the right balance for optimal effectiveness of antioxidants is largely unknown. A study was designed to determine the potential beneficial effects of antioxidant intervention on clinical parameters of RA.Methods: Randomized clinical trial of 152 patients with positive rheumatoid factor (RF) and a Disease Activity Score (DAS 28) higher than 3.2 were enrolled in the study. Patients were divided into two groups (Group A and Group B) randomly and group A received methotrexate and antioxidant vitamins (A, C and E in a fixed dose) and group B methotrexate only. They were followed up for three visits (baseline, 10th week and 14th week). The intervention was stopped after 10 weeks and was followed by a ‘wash-out’ period of 4 weeks. At baseline, 10th wee...
The decoders are widely used in the logical circuits, data transfer circuits and analog to digita... more The decoders are widely used in the logical circuits, data transfer circuits and analog to digital conversions. A mixed logic design methods for the line decoders are used to combining the transmission gate logic, pass transistor logic, and complementary metal-oxide semiconductor (CMOS) technology provides desired operation and performance. A novel topology is presented for the 2 to 4 decoder requires a fourteen transistor topology aiming on reducing the transistor count and operating power and a fifteen transistor topology aiming on high power and low delay performance. The standard and inverting decoders are designed in each of the case, gives a total of four new designs circuits. All the proposed decoders have compact transistor count compared to their conservative CMOS technologies. Finally, a variety of proposed designs present a noteworthy improvement in operating power and propagation delay, outperforming CMOS in almost all the cases.
Now-a-days quantum dot intermediate band solar cell (QD IBSC) is the most promising approach for ... more Now-a-days quantum dot intermediate band solar cell (QD IBSC) is the most promising approach for increasing the efficiency of the solar cell. In this paper In x Ga 1-x N & GaAs based p-i-n reference cell and quantum dot intermediate band solar cell where Al x Ga 1-x As is used in window layer have been studied for high efficiency and evaluated the performance with various parameters. Here quantum dots of InAs & InN are placed in the i-layer of p-i-n reference cell. V-I characteristics of p-i-n reference cell using GaAs, Al x Ga 1-x As is observed & maximum efficiency & the short circuit current density is found 32.87% & 350 A/m 2 respectively. Also an increased efficiency of 41.45% & short circuit current density of about 466.07 A/m 2 is to be found for same structure using In x Ga 1-x N material. Maximum efficiency & short circuit current is to be found 58.77% & 649 A/m 2 respectively for In x Ga 1-x N based QD IBSC and 51.59% & 543.36 A/m 2 for GaAs based QD IBSC respectively. Com...
8th International Conference on Electrical and Computer Engineering, 2014
Power conversion efficiency of conventional solar devices are low because low energy photons cann... more Power conversion efficiency of conventional solar devices are low because low energy photons cannot excite carriers to the conduction band, therefore do not contribute to the device's current and high energy photons are not efficiently used due to a poor match to the energy gap. Efficiency of solar cell may be increased in various ways; now-a-days quantum dot intermediate band solar cell (QDIBSC) is most promising approach among them. Introducing intermediate levels into the energy gap of a conventional solar cell; low energy photons can be used to promote charge carriers in a stepwise manner to the conduction band thereby enhancing the current while maintaining a large open-circuit voltage. In this thesis InXGa1-XN/InN quantum-dot intermediate band solar cell is calculated by means of solving Schrödinger equation according to the kronig-penney model. On the basis of particular assumptions, the power conversion efficiency is calculated. The results reveal that the InxGa1-xN/InN quantum dot intermediate-band solar cell gives much larger power conversion efficiency than that of conventional solar cells and the power conversion efficiency strongly depends on the size of the quantum dot and the inter dot distance.
2014 International Conference on Informatics, Electronics & Vision (ICIEV), 2014
The latest video coding standard H.264/AVC achieves better video compression rates since it adopt... more The latest video coding standard H.264/AVC achieves better video compression rates since it adopts many new features. The improvement in compression efficiency of H.264 has brought about the dramatic increase in computational complexity. In this paper an algorithm for DC mode prediction employing a new mathematical expression has been developed and analyzed computational complexity against existing algorithm for DC mode prediction. Using the proposed algorithms the encoding time decreased while slightly increasing the PSNR values with no significant rate distortion. Choosing some specific parameters and strategies the experiment has been performed and experimental result have shown that only encoding time has reduced in case of QCIF format but PSNR and bit rate are same. Using CIF format the experimental result have shown that the encoding time was increased.
Stroke is the third leading cause of death and the most prevalent disabling neurologic disease. U... more Stroke is the third leading cause of death and the most prevalent disabling neurologic disease. Urinary albumin creatinine (UACR) ratio in spot urine sample can be assessed as an early predictive factor for stroke risk determination. A cross sectional study was performed on 117 patients with stroke as case at Chittagong Medical College Hospital, Bangladesh and 117 individuals of their relatives and/or accompanying family members without history of cardiovascular disease as healthy control. Spot urine samples were obtained from both groups and urinary creatinine and albumin were measured. Mean values for urinary albumincreatinine ratio were higher in the case group compared to healthy controls. There was a significant correlation between urinary albumin creatinine ratio and stroke event (P = 0.001). UACR were also found higher among the patients who had different risk factors of stroke like DM, hypertension, and ischemic heart disease. There is positive correlation between urine albu...
Wireless transmission is affected by fading and interference effects which can be combated with e... more Wireless transmission is affected by fading and interference effects which can be combated with equalizer. The use of MIMO system promises good improvement in terms of spectral efficiency, link reliability and Signal to Noise Ratio (SNR). The effect of fading and interference always causes an issue for signal recovery in wireless communication. Equalization compensates for Inter-Symbol Interference (ISI) created by multipath within time dispersive channels. This paper analyzes the performance of Zero forcing method for MIMO wireless channels. The simulation results are obtained using MATLAB. The Bit Error Rate (BER) characteristics for the various transmitting and receiving antenna simulates in MATLAB and describes many advantages and disadvantages of the system. The simulation results show that the equalizer based zero forcing receivers is good for noise free channel and is successful in removing ISI.
Background: There is evidence that oxidative stress plays an important role in autoimmune disease... more Background: There is evidence that oxidative stress plays an important role in autoimmune diseases, such as rheumatoid arthritis (RA). Despite the supporting evidence for a beneficial effect of antioxidants on clinical characteristics of RA, the right balance for optimal effectiveness of antioxidants is largely unknown. A study was designed to determine the potential beneficial effects of antioxidant intervention on clinical parameters of RA.Methods: Randomized clinical trial of 152 patients with positive rheumatoid factor (RF) and a Disease Activity Score (DAS 28) higher than 3.2 were enrolled in the study. Patients were divided into two groups (Group A and Group B) randomly and group A received methotrexate and antioxidant vitamins (A, C and E in a fixed dose) and group B methotrexate only. They were followed up for three visits (baseline, 10th week and 14th week). The intervention was stopped after 10 weeks and was followed by a ‘wash-out’ period of 4 weeks. At baseline, 10th wee...
The decoders are widely used in the logical circuits, data transfer circuits and analog to digita... more The decoders are widely used in the logical circuits, data transfer circuits and analog to digital conversions. A mixed logic design methods for the line decoders are used to combining the transmission gate logic, pass transistor logic, and complementary metal-oxide semiconductor (CMOS) technology provides desired operation and performance. A novel topology is presented for the 2 to 4 decoder requires a fourteen transistor topology aiming on reducing the transistor count and operating power and a fifteen transistor topology aiming on high power and low delay performance. The standard and inverting decoders are designed in each of the case, gives a total of four new designs circuits. All the proposed decoders have compact transistor count compared to their conservative CMOS technologies. Finally, a variety of proposed designs present a noteworthy improvement in operating power and propagation delay, outperforming CMOS in almost all the cases.
Now-a-days quantum dot intermediate band solar cell (QD IBSC) is the most promising approach for ... more Now-a-days quantum dot intermediate band solar cell (QD IBSC) is the most promising approach for increasing the efficiency of the solar cell. In this paper In x Ga 1-x N & GaAs based p-i-n reference cell and quantum dot intermediate band solar cell where Al x Ga 1-x As is used in window layer have been studied for high efficiency and evaluated the performance with various parameters. Here quantum dots of InAs & InN are placed in the i-layer of p-i-n reference cell. V-I characteristics of p-i-n reference cell using GaAs, Al x Ga 1-x As is observed & maximum efficiency & the short circuit current density is found 32.87% & 350 A/m 2 respectively. Also an increased efficiency of 41.45% & short circuit current density of about 466.07 A/m 2 is to be found for same structure using In x Ga 1-x N material. Maximum efficiency & short circuit current is to be found 58.77% & 649 A/m 2 respectively for In x Ga 1-x N based QD IBSC and 51.59% & 543.36 A/m 2 for GaAs based QD IBSC respectively. Com...
8th International Conference on Electrical and Computer Engineering, 2014
Power conversion efficiency of conventional solar devices are low because low energy photons cann... more Power conversion efficiency of conventional solar devices are low because low energy photons cannot excite carriers to the conduction band, therefore do not contribute to the device's current and high energy photons are not efficiently used due to a poor match to the energy gap. Efficiency of solar cell may be increased in various ways; now-a-days quantum dot intermediate band solar cell (QDIBSC) is most promising approach among them. Introducing intermediate levels into the energy gap of a conventional solar cell; low energy photons can be used to promote charge carriers in a stepwise manner to the conduction band thereby enhancing the current while maintaining a large open-circuit voltage. In this thesis InXGa1-XN/InN quantum-dot intermediate band solar cell is calculated by means of solving Schrödinger equation according to the kronig-penney model. On the basis of particular assumptions, the power conversion efficiency is calculated. The results reveal that the InxGa1-xN/InN quantum dot intermediate-band solar cell gives much larger power conversion efficiency than that of conventional solar cells and the power conversion efficiency strongly depends on the size of the quantum dot and the inter dot distance.
2014 International Conference on Informatics, Electronics & Vision (ICIEV), 2014
The latest video coding standard H.264/AVC achieves better video compression rates since it adopt... more The latest video coding standard H.264/AVC achieves better video compression rates since it adopts many new features. The improvement in compression efficiency of H.264 has brought about the dramatic increase in computational complexity. In this paper an algorithm for DC mode prediction employing a new mathematical expression has been developed and analyzed computational complexity against existing algorithm for DC mode prediction. Using the proposed algorithms the encoding time decreased while slightly increasing the PSNR values with no significant rate distortion. Choosing some specific parameters and strategies the experiment has been performed and experimental result have shown that only encoding time has reduced in case of QCIF format but PSNR and bit rate are same. Using CIF format the experimental result have shown that the encoding time was increased.
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