Virtual Reality (VR) users often experience postural instability, i.e., balance problems, which c... more Virtual Reality (VR) users often experience postural instability, i.e., balance problems, which could be a major barrier to universal usability and accessibility for all, especially for persons with balance impairments. Prior research has confirmed the imbalance effect, but minimal research has been conducted to reduce this effect. We recruited 42 participants (with balance impairments: 21, without balance impairments: 21) to investigate the impact of several auditory techniques on balance in VR, specifically spatial audio, static rest frame audio, rhythmic audio, and audio mapped to the center of pressure (CoP). Participants performed two types of tasks standing visual exploration and standing reach and grasp. Within-subject results showed that each auditory technique improved balance in VR for both persons with and without balance impairments. Spatial and CoP audio improved balance significantly more than other auditory conditions. The techniques presented in this research could b...
Escherichia coli are a large and diverse group of bacteria found in the environment, foods and in... more Escherichia coli are a large and diverse group of bacteria found in the environment, foods and intestines of humans and animals. This study was carried out to observe the genotypic variations in E. coli found at different regions in Bangladesh using Amplified Ribosomal DNA Restriction Analysis (ARDRA) of the 16S rDNA and RAPD (Random Amplified Polymorphic DNA). Sewage samples were collected from different medical college hospitals and a total of 118 samples were observed in this study of which 26 were identified as E. coli based on their cultural, biochemical and molecular characteristics. Antibiotic susceptibility test was carried out where most isolates were resistant to Amoxicillin, Rifampicin and Erythromycin; and some were resistant to kanamycin, ceftriaxone, Chloramphenicol and Azithromycin; besides 73% (N=19 out of 26) of the test isolates were multi-drug resistant. Results of Polymerase chain reaction (PCR) showed that none of the isolates carried Stx1, Stx2 and LT gene. Two...
2021 IEEE Texas Power and Energy Conference (TPEC)
A nonlinear partial feedback linearizing controller is proposed in this paper for a DC microgrid ... more A nonlinear partial feedback linearizing controller is proposed in this paper for a DC microgrid connected DC-DC boost voltage source converter. The characteristics model of the DC-DC converter is developed considering transmission line losses and dynamics. A conventional PD controller and a robust H∞controller is designed for a partially linearized model of the DC microgrid connected DC-DC voltage source converter system. The performance of the PD and the H∞controller are investigated for partial feedback linearized model of the proposed system under load change at common DC-bus in the microgrid.
Chemogenomics is a comparatively nascent branch dealing with the effects of drugs and chemicals o... more Chemogenomics is a comparatively nascent branch dealing with the effects of drugs and chemicals on molecular level systems. With the emergence of this new epoch, the quantity of data sources is also unprecedentedly increasing. Despite having a plethora of a databases, the variation in bioactivity measurement as well as bias toward specific protein studies, varied computational procedures and redundant information make data mining tedious, especially for newcomers in the field. In this chapter, we give an overview of hands-on data collection and domains of applicability from some useful Web-based chemogenomic resources that are accessible with nothing more than a Web browser. This overview can help assist users in acquiring chemogenomic datasets for their project at hand.
2019 9th International Conference on Power and Energy Systems (ICPES)
The energy management of a microgrid becomes complex due to a number of reasons, including interm... more The energy management of a microgrid becomes complex due to a number of reasons, including intermittent power generation, unpredictable load demand and variable real-time electricity prices. In this paper, different energy management schemes, such as real-time and scheduling, are analysed under uncertain environments to demonstrate their effectiveness in managing a microgrid’s energy. Optimisation problems are first formulated, then separate solution methods using particle swarm optimisation algorithms are applied to efficiently manage the microgrid’s energy. It is observed that the scheduling program in all the case studies can reduce the operational costs significantly.
This paper investigates induced oscillation (specifically subsynchronous torsional interactions) ... more This paper investigates induced oscillation (specifically subsynchronous torsional interactions) in power systems arising from photovoltaic (PV) power modulation. Time domain simulations of a modified IEEE first-benchmark system are presented and analyzed. In the IEEE benchmark system, a PV generator was added at the same bus where the synchronous generator is connected. The impact of different parameters of the PV inverters' volt-volt-ampere reactive (volt-var) curve on SSTI is examined. The most severe impact found arises from the time response of the inverter's reactive power change. A second-order time response with natural frequency matching the rotor speed deviation oscillation frequency and low-damping ratio quickly drives the system to an unstable region. Although it is highly unlikely that conditions necessary for distributed energy resource-induced oscillations would occur in the field, with knowledge of this vulnerability in mind, inverters' control parameters...
2018 IEEE 7th World Conference on Photovoltaic Energy Conversion (WCPEC) (A Joint Conference of 45th IEEE PVSC, 28th PVSEC & 34th EU PVSEC), 2018
This paper investigates the test procedures specified in UL 1741 SA and the upcoming revision to ... more This paper investigates the test procedures specified in UL 1741 SA and the upcoming revision to IEEE P1547.1. A 550 kVA photovoltaic inverter was chosen for the tests. This research reveals some of the key components to consider while doing certification tests for UL 1741 SA and IEEE P1547.1. This paper also identifies some issues requiring consideration for future releases of the standard, i.e. IEEE P1547.1.
2019 9th International Conference on Power and Energy Systems (ICPES), 2019
This paper proposes a day-ahead energy management program for a residential house while taking in... more This paper proposes a day-ahead energy management program for a residential house while taking into account the degradation costs of a battery to reflect the true operational costs. In the method, charging-discharging cycling costs are integrated into the energy exchange program for evaluating their effect on the operating costs. The optimisation problem formulated is solved using a framework, in which particle swarm optimisation (PSO) algorithm and Rainflow counting algorithm are used. Simulation results demonstrate that including cycling costs to the objective function estimates the appropriate operating costs of the scheduled energy. It is also found that the proposed algorithm can decrease electricity costs by around 11.29% as compared to the baseline approach. Simulation results also prove the effectiveness of the proposed method in managing battery energy effectively.
Diabetes mellitus is the rapid development disease that caused by metabolic disorder. There are m... more Diabetes mellitus is the rapid development disease that caused by metabolic disorder. There are many several risk factors exists, among them, hypertension and smoking is the most important. To find out the relationship between hypertension with diabetes mellitus the present study was cooducted incorporating 105 patients from the Bangladesh Institute of Research and Rehabilitation in Diabetes, Endocrine and Metabolic Disorders (BIRDEM). In this survey type study data were collected using a questionnaire which include question regarding name, address, sex, age, education, marital status, occupation, smoking, betel nut, table salt etc. All data were evaluated and compared with each patient. The results of the study showed that 70% patients were male and 30% patients werefemale. Among the patients 57% people were attacked by hypertension. The distribution of diabetes mellitus in different age range showed that from 40-59 years, people are more prone to suffering from diabetes mellitus. ...
2021 IEEE Texas Power and Energy Conference (TPEC), 2021
A nonlinear partial feedback linearizing controller is proposed in this paper for a DC microgrid ... more A nonlinear partial feedback linearizing controller is proposed in this paper for a DC microgrid connected DC-DC boost voltage source converter. The characteristics model of the DC-DC converter is developed considering transmission line losses and dynamics. A conventional PD controller and a robust H∞controller is designed for a partially linearized model of the DC microgrid connected DC-DC voltage source converter system. The performance of the PD and the H∞controller are investigated for partial feedback linearized model of the proposed system under load change at common DC-bus in the microgrid.
In this chapter, we provide the detailed implementation of the proposed microgrid framework in pa... more In this chapter, we provide the detailed implementation of the proposed microgrid framework in part I. As a case study, a droop-based load sharing algorithm with the capability of controlling the active and reactive power have been implemented. Several load sharing scenarios have been studied to verify the capability of the suggested prototype in performance evaluation and verification of different control strategies in microgrid systems. The performed experiments confirm the capacity of the proposed structure in microgrid research and development (R&D), as well as education.
2019 9th International Conference on Power and Energy Systems (ICPES), 2019
The energy management of a microgrid becomes complex due to a number of reasons, including interm... more The energy management of a microgrid becomes complex due to a number of reasons, including intermittent power generation, unpredictable load demand and variable real-time electricity prices. In this paper, different energy management schemes, such as real-time and scheduling, are analysed under uncertain environments to demonstrate their effectiveness in managing a microgrid’s energy. Optimisation problems are first formulated, then separate solution methods using particle swarm optimisation algorithms are applied to efficiently manage the microgrid’s energy. It is observed that the scheduling program in all the case studies can reduce the operational costs significantly.
Virtual Reality (VR) users often experience postural instability, i.e., balance problems, which c... more Virtual Reality (VR) users often experience postural instability, i.e., balance problems, which could be a major barrier to universal usability and accessibility for all, especially for persons with balance impairments. Prior research has confirmed the imbalance effect, but minimal research has been conducted to reduce this effect. We recruited 42 participants (with balance impairments: 21, without balance impairments: 21) to investigate the impact of several auditory techniques on balance in VR, specifically spatial audio, static rest frame audio, rhythmic audio, and audio mapped to the center of pressure (CoP). Participants performed two types of tasks standing visual exploration and standing reach and grasp. Within-subject results showed that each auditory technique improved balance in VR for both persons with and without balance impairments. Spatial and CoP audio improved balance significantly more than other auditory conditions. The techniques presented in this research could b...
Escherichia coli are a large and diverse group of bacteria found in the environment, foods and in... more Escherichia coli are a large and diverse group of bacteria found in the environment, foods and intestines of humans and animals. This study was carried out to observe the genotypic variations in E. coli found at different regions in Bangladesh using Amplified Ribosomal DNA Restriction Analysis (ARDRA) of the 16S rDNA and RAPD (Random Amplified Polymorphic DNA). Sewage samples were collected from different medical college hospitals and a total of 118 samples were observed in this study of which 26 were identified as E. coli based on their cultural, biochemical and molecular characteristics. Antibiotic susceptibility test was carried out where most isolates were resistant to Amoxicillin, Rifampicin and Erythromycin; and some were resistant to kanamycin, ceftriaxone, Chloramphenicol and Azithromycin; besides 73% (N=19 out of 26) of the test isolates were multi-drug resistant. Results of Polymerase chain reaction (PCR) showed that none of the isolates carried Stx1, Stx2 and LT gene. Two...
2021 IEEE Texas Power and Energy Conference (TPEC)
A nonlinear partial feedback linearizing controller is proposed in this paper for a DC microgrid ... more A nonlinear partial feedback linearizing controller is proposed in this paper for a DC microgrid connected DC-DC boost voltage source converter. The characteristics model of the DC-DC converter is developed considering transmission line losses and dynamics. A conventional PD controller and a robust H∞controller is designed for a partially linearized model of the DC microgrid connected DC-DC voltage source converter system. The performance of the PD and the H∞controller are investigated for partial feedback linearized model of the proposed system under load change at common DC-bus in the microgrid.
Chemogenomics is a comparatively nascent branch dealing with the effects of drugs and chemicals o... more Chemogenomics is a comparatively nascent branch dealing with the effects of drugs and chemicals on molecular level systems. With the emergence of this new epoch, the quantity of data sources is also unprecedentedly increasing. Despite having a plethora of a databases, the variation in bioactivity measurement as well as bias toward specific protein studies, varied computational procedures and redundant information make data mining tedious, especially for newcomers in the field. In this chapter, we give an overview of hands-on data collection and domains of applicability from some useful Web-based chemogenomic resources that are accessible with nothing more than a Web browser. This overview can help assist users in acquiring chemogenomic datasets for their project at hand.
2019 9th International Conference on Power and Energy Systems (ICPES)
The energy management of a microgrid becomes complex due to a number of reasons, including interm... more The energy management of a microgrid becomes complex due to a number of reasons, including intermittent power generation, unpredictable load demand and variable real-time electricity prices. In this paper, different energy management schemes, such as real-time and scheduling, are analysed under uncertain environments to demonstrate their effectiveness in managing a microgrid’s energy. Optimisation problems are first formulated, then separate solution methods using particle swarm optimisation algorithms are applied to efficiently manage the microgrid’s energy. It is observed that the scheduling program in all the case studies can reduce the operational costs significantly.
This paper investigates induced oscillation (specifically subsynchronous torsional interactions) ... more This paper investigates induced oscillation (specifically subsynchronous torsional interactions) in power systems arising from photovoltaic (PV) power modulation. Time domain simulations of a modified IEEE first-benchmark system are presented and analyzed. In the IEEE benchmark system, a PV generator was added at the same bus where the synchronous generator is connected. The impact of different parameters of the PV inverters' volt-volt-ampere reactive (volt-var) curve on SSTI is examined. The most severe impact found arises from the time response of the inverter's reactive power change. A second-order time response with natural frequency matching the rotor speed deviation oscillation frequency and low-damping ratio quickly drives the system to an unstable region. Although it is highly unlikely that conditions necessary for distributed energy resource-induced oscillations would occur in the field, with knowledge of this vulnerability in mind, inverters' control parameters...
2018 IEEE 7th World Conference on Photovoltaic Energy Conversion (WCPEC) (A Joint Conference of 45th IEEE PVSC, 28th PVSEC & 34th EU PVSEC), 2018
This paper investigates the test procedures specified in UL 1741 SA and the upcoming revision to ... more This paper investigates the test procedures specified in UL 1741 SA and the upcoming revision to IEEE P1547.1. A 550 kVA photovoltaic inverter was chosen for the tests. This research reveals some of the key components to consider while doing certification tests for UL 1741 SA and IEEE P1547.1. This paper also identifies some issues requiring consideration for future releases of the standard, i.e. IEEE P1547.1.
2019 9th International Conference on Power and Energy Systems (ICPES), 2019
This paper proposes a day-ahead energy management program for a residential house while taking in... more This paper proposes a day-ahead energy management program for a residential house while taking into account the degradation costs of a battery to reflect the true operational costs. In the method, charging-discharging cycling costs are integrated into the energy exchange program for evaluating their effect on the operating costs. The optimisation problem formulated is solved using a framework, in which particle swarm optimisation (PSO) algorithm and Rainflow counting algorithm are used. Simulation results demonstrate that including cycling costs to the objective function estimates the appropriate operating costs of the scheduled energy. It is also found that the proposed algorithm can decrease electricity costs by around 11.29% as compared to the baseline approach. Simulation results also prove the effectiveness of the proposed method in managing battery energy effectively.
Diabetes mellitus is the rapid development disease that caused by metabolic disorder. There are m... more Diabetes mellitus is the rapid development disease that caused by metabolic disorder. There are many several risk factors exists, among them, hypertension and smoking is the most important. To find out the relationship between hypertension with diabetes mellitus the present study was cooducted incorporating 105 patients from the Bangladesh Institute of Research and Rehabilitation in Diabetes, Endocrine and Metabolic Disorders (BIRDEM). In this survey type study data were collected using a questionnaire which include question regarding name, address, sex, age, education, marital status, occupation, smoking, betel nut, table salt etc. All data were evaluated and compared with each patient. The results of the study showed that 70% patients were male and 30% patients werefemale. Among the patients 57% people were attacked by hypertension. The distribution of diabetes mellitus in different age range showed that from 40-59 years, people are more prone to suffering from diabetes mellitus. ...
2021 IEEE Texas Power and Energy Conference (TPEC), 2021
A nonlinear partial feedback linearizing controller is proposed in this paper for a DC microgrid ... more A nonlinear partial feedback linearizing controller is proposed in this paper for a DC microgrid connected DC-DC boost voltage source converter. The characteristics model of the DC-DC converter is developed considering transmission line losses and dynamics. A conventional PD controller and a robust H∞controller is designed for a partially linearized model of the DC microgrid connected DC-DC voltage source converter system. The performance of the PD and the H∞controller are investigated for partial feedback linearized model of the proposed system under load change at common DC-bus in the microgrid.
In this chapter, we provide the detailed implementation of the proposed microgrid framework in pa... more In this chapter, we provide the detailed implementation of the proposed microgrid framework in part I. As a case study, a droop-based load sharing algorithm with the capability of controlling the active and reactive power have been implemented. Several load sharing scenarios have been studied to verify the capability of the suggested prototype in performance evaluation and verification of different control strategies in microgrid systems. The performed experiments confirm the capacity of the proposed structure in microgrid research and development (R&D), as well as education.
2019 9th International Conference on Power and Energy Systems (ICPES), 2019
The energy management of a microgrid becomes complex due to a number of reasons, including interm... more The energy management of a microgrid becomes complex due to a number of reasons, including intermittent power generation, unpredictable load demand and variable real-time electricity prices. In this paper, different energy management schemes, such as real-time and scheduling, are analysed under uncertain environments to demonstrate their effectiveness in managing a microgrid’s energy. Optimisation problems are first formulated, then separate solution methods using particle swarm optimisation algorithms are applied to efficiently manage the microgrid’s energy. It is observed that the scheduling program in all the case studies can reduce the operational costs significantly.
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