Md Jahidul Islam - Academia.edu (original) (raw)

Papers by Md Jahidul Islam

Research paper thumbnail of Robot-to-robot relative pose estimation using humans as markers

Autonomous Robots, 2021

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Research paper thumbnail of Low Resolution Camera For Human Detection And Tracking

This paper presents a robust and computationally efficient method for human detection and trackin... more This paper presents a robust and computationally efficient method for human detection and tracking. The unique feature of this method is that it has dedicated threads for human detection and camera control for human tracking. Moreover, it works with infra-red on and infra-red off. The method consists of five parts – training image acquisition, background subtraction, feature extraction, system training, and system testing. Firstly, some sample video clips have been taken with an IP camera for initial system implementation. The clips are then filtered to separate background and foreground. After that, some morphological operations are carried out to identify the most significant motion in the foreground. Those parts are cropped with some extra area and used to train a multiclass support vector machine (SVM) along with an image subset of the people detection dataset of The National Institute for Research in Computer Science and Control (French: Institut National de Recherche en Inform...

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Research paper thumbnail of Fermented Rice Bran Supplementation Prevents the Development of Intestinal Fibrosis Due to DSS-Induced Inflammation in Mice

Nutrients, 2021

Fermented rice bran (FRB) is known to protect mice intestines against dextran sodium sulfate (DSS... more Fermented rice bran (FRB) is known to protect mice intestines against dextran sodium sulfate (DSS)-induced inflammation; however, the restoration of post-colitis intestinal homeostasis using FRB supplementation is currently undocumented. In this study, we observed the effects of dietary FRB supplementation on intestinal restoration and the development of fibrosis after DSS-induced colitis. DSS (1.5%) was introduced in the drinking water of mice for 5 days. Eight mice were sacrificed immediately after the DSS treatment ended. The remaining mice were divided into three groups, comprising the following diets: control, 10% rice bran (RB), and 10% FRB-supplemented. Diet treatment was continued for 2 weeks, after which half the population of mice from each group was sacrificed. The experiment was continued for another 3 weeks before the remaining mice were sacrificed. FRB supplementation could reduce the general observation of colitis and production of intestinal pro-inflammatory cytokine...

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Research paper thumbnail of Chiral lanthanide lumino-glass for a circularly polarized light security device

Communications Chemistry, 2020

Artificial light plays an essential role in information technologies such as optical telecommunic... more Artificial light plays an essential role in information technologies such as optical telecommunications, data storage, security features, and the display of information. Here, we show a chiral lanthanide lumino-glass with extra-large circularly polarized luminescence (CPL) for advanced photonic security device applications. The chiral lanthanide glass is composed of a europium complex with the chiral (+)-3-(trifluoroacetyl)camphor ligand and the achiral glass promoter tris(2,6-dimethoxyphenyl)phosphine oxide ligand. The glass phase transition behavior of the Eu(III) complex is characterized using differential scanning calorimetry. The transparent amorphous glass shows CPL with extra-large dissymmetry factor of gCPL = 1.2. The brightness of the lumino-glass is one thousand times larger than that of Eu(III) luminophores embedded in polymer films of the same thickness at a Eu(III) concentration of 1 mM. The application of the chiral lanthanide lumino-glass in an advanced security paint...

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Research paper thumbnail of Person-following by autonomous robots: A categorical overview

The International Journal of Robotics Research, 2019

A wide range of human–robot collaborative applications in diverse domains, such as manufacturing,... more A wide range of human–robot collaborative applications in diverse domains, such as manufacturing, health care, the entertainment industry, and social interactions, require an autonomous robot to follow its human companion. Different working environments and applications pose diverse challenges by adding constraints on the choice of sensors, degree of autonomy, and dynamics of a person-following robot. Researchers have addressed these challenges in many ways and contributed to the development of a large body of literature. This paper provides a comprehensive overview of the literature by categorizing different aspects of person-following by autonomous robots. Also, the corresponding operational challenges are identified based on various design choices for ground, underwater, and aerial scenarios. In addition, state-of-the-art methods for perception, planning, control, and interaction are elaborately discussed and their applicability in varied operational scenarios is presented. Then ...

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Research paper thumbnail of Understanding human motion and gestures for underwater human–robot collaboration

Journal of Field Robotics, 2018

In this paper, we present a number of robust methodologies for an underwater robot to visually de... more In this paper, we present a number of robust methodologies for an underwater robot to visually detect, follow, and interact with a diver for collaborative task execution. We design and develop two autonomous diver‐following algorithms, the first of which utilizes both spatial‐ and frequency‐domain features pertaining to human swimming patterns to visually track a diver. The second algorithm uses a convolutional neural network‐based model for robust tracking‐by‐detection. In addition, we propose a hand gesture‐based human–robot communication framework that is syntactically simpler and computationally more efficient than the existing grammar‐based frameworks. In the proposed interaction framework, deep visual detectors are used to provide accurate hand gesture recognition; subsequently, a finite‐state machine performs robust and efficient gesture‐to‐instruction mapping. The distinguishing feature of this framework is that it can be easily adopted by divers for communicating with under...

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Research paper thumbnail of Fermented rice bran supplementation mitigates metabolic syndrome in stroke-prone spontaneously hypertensive rats

BMC Complementary and Alternative Medicine, 2016

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Research paper thumbnail of Major Ion Chemistry of the Groundwater under Jhenaidah District of Bangladesh for Irrigation, Drinking and Industrial Uses

International Research Journal of Pure and Applied Chemistry, 2016

ABSTRACT Aims:The study was carried out to determine the baseline cation and anion concentrations... more ABSTRACT Aims:The study was carried out to determine the baseline cation and anion concentrations of the groundwater of Kaliganj Upazila of Jhenaidah districtof Bangladesh and to evaluate the suitability of these water sources for irrigation, drinking and industrial uses. Study Design:The research was carried out in laboratory and field. Place and Duration of Study: Samples of water were collected from Kaliganj Upazila of Jhenaidah district during July-September 2013. Methodology: A total of 45 groundwater (6 deep tube-wells, 19 shallow tube-wells, 20 hand tube-wells) samples were collected from existing wells in the study areas. The collected water samples were carried to the laboratory of the Department of Agricultural Chemistry, Hajee Mohammad Danesh Science and Technology University, Dinajpur, Bangladesh for testing. The samples were analyzed as quickly as possible on arrival at the laboratory. All reagents were analytical grade. For SO4 2-and PO 4 -, samples were refrigerated and analyzed within 24 hrs. Results:The pH values indicated that the waters were mostly acidic in nature. Among the chemical budget of ions, magnesium and chloride were found to be the most predominant ions. The average amount of Ca, Na, K and HCO 3- were safe for crop production. The mean values of TDS and SAR indicated the excellent category for irrigation. Based on SSP all waters were excellent classes. In respect to hardness, water was moderately hard to very hard classes. Based on the total hardness, most ground waters were moderately hard. All waters were free from RSC and belong to the suitable category. Most of the major ionic constituents were detected below the acceptable level for drinking. All water samples are more or less suitable for industrial uses. Other micronutrients like Fe, Zn, Mn, Cu and Cl were within the safe limit for irrigating agricultural crops. Iron and Mn exceeded the drinking standard in some waters. Conclusion: All water samples are more or less suitable for industries like brewery, ice manufacture purpose, dairy farm and carbonate beverage. But almost all waters were unsuitable for textile and laundering. All waters were suitablefor drinking and irrigation uses; although some samples were rated to be unsuitable for some specific ions.

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Research paper thumbnail of Diseases pattern in the department of physical medicine & rehabilitation in a tertiary level hospital

Bangladesh Medical Journal, 2016

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Research paper thumbnail of Channel Assignment Techniques for Multi-Radio Wireless Mesh Networks: A Survey

IEEE Communications Surveys & Tutorials, 2016

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Research paper thumbnail of Role of Baclofen in Combination with Intensive Rehabilitation in Spastic Cerebral Palsy

Journal of National Institute of Neurosciences Bangladesh, 2015

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Research paper thumbnail of Thermal Properties of Carbon Nanotube (CNT) Reinforced Polyvinyl Alcohol (PVA) Composites

International Letters of Chemistry, Physics and Astronomy, 2013

Homogeneous Polyvinyl alcohol (PVA)/Carbon nanotube (CNT) composite has been prepared by solution... more Homogeneous Polyvinyl alcohol (PVA)/Carbon nanotube (CNT) composite has been prepared by solution casting method using gum acacia as a surfactant. CNT content in the composite was varied from 5-10% by weight. The thermal properties of PVA/CNT composites were investigated by Thermo Gravimetric/Differential Thermal Analyzer (TG/DTA) and Thermo Mechanical Analyzer (TMA). TG/DTA results showed that higher thermal stability in higher percentage of CNT in the composites. The 10% CNT containing PVA composite exhibit highest onset of melting, glass transition point and offset of melting temperature and the recoded values are 330.4K, 379K and 421.3K respectively. All of the result indicates that the developed PVA/CNT composite might be promising for use in solar cell application

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Research paper thumbnail of Development of Electrically Conductive Nanocrystalline Thin Film for Optoelectronic Applications

International Letters of Chemistry, Physics and Astronomy, 2013

Sodium alginate (TiO2) sand composites were prepared by solution casting. Purified sand was added... more Sodium alginate (TiO2) sand composites were prepared by solution casting. Purified sand was added in the composite films to increase electrical conductivity. Electrical properties such as conductivity, capacitance, dielectric constant, and loss tangent of the composites were investigated. The current voltage characteristics for all the composites showed ohmic behavior. All the electrical properties have been found to improve with the incorporation of sand (SiO2) but 6% sand containing composite exhibits the best electrical properties. The mechanical properties tensile strength (TS), elongation at break (Eb) and Young modulus for 6% sand containing composite film are found to be 4.445 MPa, 9.76%, and 72.8 MPa respectively. The experimental results reveal that the blended films exhibit higher stability and improved mechanical properties of both tensile strength and elongation at break in dry state. Water absorption properties of the composites are found to decrease with the increase o...

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Research paper thumbnail of Effect of intraarticular steroid injection in addition to physical modalities in osteoarthritis knee

Journal of Dhaka Medical College, 2015

Context: Osteoarthritis (OA) is the most common form of arthritis accounting for about 30% of gen... more Context: Osteoarthritis (OA) is the most common form of arthritis accounting for about 30% of general physician visits. Intrarticular (IA) corticosteroid injections have been used for decades in clinical practice for pain relief and control of local inflammation in OA. In the present study a combined therapy of long acting intra-articular injection in addition to physical modalities of OA knee was given to find out the functional improvement and clinical outcome of the patient. Methods: It was a prospective interventional non-randomized clinical study conducted in the Department of Physical Medicine & Rehabilitation, Bangabandhu Sheikh Mujib Medical University (BSMMU), Dhaka, from October, 2011 to March, 2012. Fifty four patients between 35 and 75 years without consideration of gender with a history of not less than three months knee pain with radiographic confirmation of primary osteoarthritis were selected purposefully. Then they were divided randomly in group A and B, having 27 p...

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Research paper thumbnail of Efficacy of baclofen in combination with intensive rehabilitation in spastic cerebral palsy- a randomized clinical trial

Journal of Dhaka Medical College, 2015

Objective: To find out the combined efficacy of baclofen and intensive rehabilitation in the trea... more Objective: To find out the combined efficacy of baclofen and intensive rehabilitation in the treatment of spastic cerebral palsy. Methods: This randomized clinical trial was conducted over 60 patients in Dhaka Medical College Hospital, Dhaka, between January and December 2011. The patient satisfying the inclusion and exclusion criteria was randomly enrolled into two groups; Group A (case) included 30 patients received only intensive rehabilitation and Group B (control) included 30 patients who received baclofen orally two times daily according to the body weight regularly in combination with intensive rehabilitation 1 hour daily five times a week for 24 weeks. All patients were followed up at 4 weeks interval and were evaluated for a total of 24 weeks. Results: Combination of baclofen and intensive rehabilitation has superior efficacy in reducing tone in spastic cerebral palsy over only rehabilitation measured by using Modified Ashworth scale (p<0.001). Combination of baclofen an...

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Research paper thumbnail of Aetiological Factors of Osteoarthritis: A Review Update

Journal of Current and Advance Medical Research, 2015

Osteoarthritis (OA) is no longer considered ‘degenerative’ or ‘wear and tear’ arthritis; rather i... more Osteoarthritis (OA) is no longer considered ‘degenerative’ or ‘wear and tear’ arthritis; rather involves dynamic biomechanical, biochemical and cellular process. Indeed, the joint damage that occurs in OA is the result of active remodeling involving all the joint structures. Although articular cartilage is at the center of change, OA is viewed as a disease of the entire joint. Traditionally, OA has been viewed as an inevitable degenerative condition of the cartilage. It is currently viewed as a biomechanical and biochemical inflammatory disease of the entire joints. Osteoarthritis (OA) is the most common type of arthritis. Its high prevalence, especially in the elderly, and the high rate of disability related to disease make it a leading cause of disability in the elderly. Because of the aging of Western populations and because obesity, a major risk factor, are increasing in prevalence, the occurrence of osteoarthritis is on the rise. In the United States, osteoarthritis prevalence ...

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Research paper thumbnail of Ethnomedicinal plants of various tribal and folk medicinal practitioners of six localities of Rangamati and Khagrachari districts in Bangladesh

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Research paper thumbnail of In vitro Regeneration Protocol for Anupam and Chini Champa: Two Banana (Musa sapientum) Cultivars of Bangladesh

ABSTRACT Anupam and Chini Chmpa are the two most favored banana (Musa sapientum) cultivars in Ban... more ABSTRACT Anupam and Chini Chmpa are the two most favored banana (Musa sapientum) cultivars in Bangladesh. The fruit, inflorescences and pseudostems are the edible parts and rich in carbohydrate, protein, minerals and vitamins. It’s now a matter for grower to have disease free planting materials in large quantities because of transmission of viral disease through conventional propagation by suckers that reduces banana yield in the country. Our objective of this study was to develop an in vitro method of clonal propagation of these two cultivars. The experimental design was conducted to examine the effect of phytohormones in vitro on these cultivars. For in vitro study, field grown suckers were collected to isolate the meristemic part of the pseudostems and cultured in Murshige and Skoog (MS) medium containing plant growth hormones after surface sterilization by 0.1% HgCl2 containing 6-benzyleaminopurine (BAP), kinetin (Kn), indole-3-acetic acid (IAA) and indole-3-butyric acid (IBA) for six weeks. Buds were sprouted when cultured in MS + BAP [4.5 mg/l] for Chini Champa, and when MS was upplemented with BAP [2.0mg/l] then 75% response was obtained with Anupam. Synergistic effect of cytokinin and auxin was found effective in improving shoot proliferation rate for both the cultivars. In Chini Champa, BAP [5.0 mg/l] + IAA [2.5 mg/l] showed 85% frequency with an average of 1.9±0.09 cm and in Anupam shoot length attained up to 2.9±0.11 cm in MS + BAP [5.0 mg/l] + IAA [1.5 mg/l]. Combination of BAP and Kn was found effective only in Anupam. Tallest shoot (3.5±0.09) was observed in MS + Kn [2.0 mg/l] + IAA [0.25 mg/l]. The regenerated micro-shoots were then cultured to induce roots in MS + IBA [1.0 mg/l]. The plantlets were transplanted in to soil followed by hardening and acclimatization and 85% survival rate was obtained after eight weeks. Our developed protocol can play a role for in vitro studies on banana and as well as can produce plantlets for these cultivars.

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Research paper thumbnail of Effects of SiO2 on Thermal and Optical Properties of Na-alginate/TiO2/SiO2 composite thin films

Sodium alginate (NaC6H7O6)/Titanium dioxide (TiO2) thin films have been successfully developed by... more Sodium alginate (NaC6H7O6)/Titanium dioxide (TiO2) thin films have been successfully developed by depositing SiO2 by using solution casting process at room temperature. The absorbance and transmittance of light had been determined by UV-visible spectroscopy and from transmittance data band gap of the composites were calculated. The smallest band gap of 2.82 eV is found for the 6% SiO2 containing composite while 0% SiO2 containing composite exhibits band gap to be 3.19 eV. Thermal Properties of the films were characterized by thermo gravimetric/differential thermal analyzer (TG/DTA). The experimental results reveal that the blended films exhibit higher stability and improved thermal properties, which suggests the occurrence of interaction detected by FTIR among sodium alginate, TiO2, SiO2, and water molecules in the films. Semiconducting composite thin films have useful applications for solar cells and optoelectronics. Thus, sodium alginate/TiO2/SiO2 nanocomposite films have attracte...

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Research paper thumbnail of Characterization of acid burn victims in two selected health facilities in Dhaka city

Bangladesh Medical Journal, 2014

This descriptive cross sectional study was carried out in Dhaka Medical College Hospital (DMCH) a... more This descriptive cross sectional study was carried out in Dhaka Medical College Hospital (DMCH) and Acid Survivors Foundation (ASF), Dhaka from January to June 2010 among the acid burn patients admitted in DMCH and acid burn victims taking services from ASF to find out the socio-demographic characteristics, physical extent of injury, and to identify the reasons behind acid burn in selected institution in Dhaka city. A total of 112 samples were taken purposively and data were collected by face to face interview. Among the respondents most were female (58.04%). Mean age was 20.3 years and most came from rural and semi-urban areas (91.82%)l. Most of the incident occurred at the mid-night and at the time of sleeping (69.09%). 23% of the respondents lost their partial or full eye sight or hearing or both. Post burn complications developed in old burn patients 75.8%. Most of the victims (83%) faced various type of problems. Among the respondents, 65.2% suffered from superficial burn, 31.2...

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Research paper thumbnail of Robot-to-robot relative pose estimation using humans as markers

Autonomous Robots, 2021

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Research paper thumbnail of Low Resolution Camera For Human Detection And Tracking

This paper presents a robust and computationally efficient method for human detection and trackin... more This paper presents a robust and computationally efficient method for human detection and tracking. The unique feature of this method is that it has dedicated threads for human detection and camera control for human tracking. Moreover, it works with infra-red on and infra-red off. The method consists of five parts – training image acquisition, background subtraction, feature extraction, system training, and system testing. Firstly, some sample video clips have been taken with an IP camera for initial system implementation. The clips are then filtered to separate background and foreground. After that, some morphological operations are carried out to identify the most significant motion in the foreground. Those parts are cropped with some extra area and used to train a multiclass support vector machine (SVM) along with an image subset of the people detection dataset of The National Institute for Research in Computer Science and Control (French: Institut National de Recherche en Inform...

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Research paper thumbnail of Fermented Rice Bran Supplementation Prevents the Development of Intestinal Fibrosis Due to DSS-Induced Inflammation in Mice

Nutrients, 2021

Fermented rice bran (FRB) is known to protect mice intestines against dextran sodium sulfate (DSS... more Fermented rice bran (FRB) is known to protect mice intestines against dextran sodium sulfate (DSS)-induced inflammation; however, the restoration of post-colitis intestinal homeostasis using FRB supplementation is currently undocumented. In this study, we observed the effects of dietary FRB supplementation on intestinal restoration and the development of fibrosis after DSS-induced colitis. DSS (1.5%) was introduced in the drinking water of mice for 5 days. Eight mice were sacrificed immediately after the DSS treatment ended. The remaining mice were divided into three groups, comprising the following diets: control, 10% rice bran (RB), and 10% FRB-supplemented. Diet treatment was continued for 2 weeks, after which half the population of mice from each group was sacrificed. The experiment was continued for another 3 weeks before the remaining mice were sacrificed. FRB supplementation could reduce the general observation of colitis and production of intestinal pro-inflammatory cytokine...

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Research paper thumbnail of Chiral lanthanide lumino-glass for a circularly polarized light security device

Communications Chemistry, 2020

Artificial light plays an essential role in information technologies such as optical telecommunic... more Artificial light plays an essential role in information technologies such as optical telecommunications, data storage, security features, and the display of information. Here, we show a chiral lanthanide lumino-glass with extra-large circularly polarized luminescence (CPL) for advanced photonic security device applications. The chiral lanthanide glass is composed of a europium complex with the chiral (+)-3-(trifluoroacetyl)camphor ligand and the achiral glass promoter tris(2,6-dimethoxyphenyl)phosphine oxide ligand. The glass phase transition behavior of the Eu(III) complex is characterized using differential scanning calorimetry. The transparent amorphous glass shows CPL with extra-large dissymmetry factor of gCPL = 1.2. The brightness of the lumino-glass is one thousand times larger than that of Eu(III) luminophores embedded in polymer films of the same thickness at a Eu(III) concentration of 1 mM. The application of the chiral lanthanide lumino-glass in an advanced security paint...

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Research paper thumbnail of Person-following by autonomous robots: A categorical overview

The International Journal of Robotics Research, 2019

A wide range of human–robot collaborative applications in diverse domains, such as manufacturing,... more A wide range of human–robot collaborative applications in diverse domains, such as manufacturing, health care, the entertainment industry, and social interactions, require an autonomous robot to follow its human companion. Different working environments and applications pose diverse challenges by adding constraints on the choice of sensors, degree of autonomy, and dynamics of a person-following robot. Researchers have addressed these challenges in many ways and contributed to the development of a large body of literature. This paper provides a comprehensive overview of the literature by categorizing different aspects of person-following by autonomous robots. Also, the corresponding operational challenges are identified based on various design choices for ground, underwater, and aerial scenarios. In addition, state-of-the-art methods for perception, planning, control, and interaction are elaborately discussed and their applicability in varied operational scenarios is presented. Then ...

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Research paper thumbnail of Understanding human motion and gestures for underwater human–robot collaboration

Journal of Field Robotics, 2018

In this paper, we present a number of robust methodologies for an underwater robot to visually de... more In this paper, we present a number of robust methodologies for an underwater robot to visually detect, follow, and interact with a diver for collaborative task execution. We design and develop two autonomous diver‐following algorithms, the first of which utilizes both spatial‐ and frequency‐domain features pertaining to human swimming patterns to visually track a diver. The second algorithm uses a convolutional neural network‐based model for robust tracking‐by‐detection. In addition, we propose a hand gesture‐based human–robot communication framework that is syntactically simpler and computationally more efficient than the existing grammar‐based frameworks. In the proposed interaction framework, deep visual detectors are used to provide accurate hand gesture recognition; subsequently, a finite‐state machine performs robust and efficient gesture‐to‐instruction mapping. The distinguishing feature of this framework is that it can be easily adopted by divers for communicating with under...

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Research paper thumbnail of Fermented rice bran supplementation mitigates metabolic syndrome in stroke-prone spontaneously hypertensive rats

BMC Complementary and Alternative Medicine, 2016

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Research paper thumbnail of Major Ion Chemistry of the Groundwater under Jhenaidah District of Bangladesh for Irrigation, Drinking and Industrial Uses

International Research Journal of Pure and Applied Chemistry, 2016

ABSTRACT Aims:The study was carried out to determine the baseline cation and anion concentrations... more ABSTRACT Aims:The study was carried out to determine the baseline cation and anion concentrations of the groundwater of Kaliganj Upazila of Jhenaidah districtof Bangladesh and to evaluate the suitability of these water sources for irrigation, drinking and industrial uses. Study Design:The research was carried out in laboratory and field. Place and Duration of Study: Samples of water were collected from Kaliganj Upazila of Jhenaidah district during July-September 2013. Methodology: A total of 45 groundwater (6 deep tube-wells, 19 shallow tube-wells, 20 hand tube-wells) samples were collected from existing wells in the study areas. The collected water samples were carried to the laboratory of the Department of Agricultural Chemistry, Hajee Mohammad Danesh Science and Technology University, Dinajpur, Bangladesh for testing. The samples were analyzed as quickly as possible on arrival at the laboratory. All reagents were analytical grade. For SO4 2-and PO 4 -, samples were refrigerated and analyzed within 24 hrs. Results:The pH values indicated that the waters were mostly acidic in nature. Among the chemical budget of ions, magnesium and chloride were found to be the most predominant ions. The average amount of Ca, Na, K and HCO 3- were safe for crop production. The mean values of TDS and SAR indicated the excellent category for irrigation. Based on SSP all waters were excellent classes. In respect to hardness, water was moderately hard to very hard classes. Based on the total hardness, most ground waters were moderately hard. All waters were free from RSC and belong to the suitable category. Most of the major ionic constituents were detected below the acceptable level for drinking. All water samples are more or less suitable for industrial uses. Other micronutrients like Fe, Zn, Mn, Cu and Cl were within the safe limit for irrigating agricultural crops. Iron and Mn exceeded the drinking standard in some waters. Conclusion: All water samples are more or less suitable for industries like brewery, ice manufacture purpose, dairy farm and carbonate beverage. But almost all waters were unsuitable for textile and laundering. All waters were suitablefor drinking and irrigation uses; although some samples were rated to be unsuitable for some specific ions.

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Research paper thumbnail of Diseases pattern in the department of physical medicine & rehabilitation in a tertiary level hospital

Bangladesh Medical Journal, 2016

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Research paper thumbnail of Channel Assignment Techniques for Multi-Radio Wireless Mesh Networks: A Survey

IEEE Communications Surveys & Tutorials, 2016

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Research paper thumbnail of Role of Baclofen in Combination with Intensive Rehabilitation in Spastic Cerebral Palsy

Journal of National Institute of Neurosciences Bangladesh, 2015

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Research paper thumbnail of Thermal Properties of Carbon Nanotube (CNT) Reinforced Polyvinyl Alcohol (PVA) Composites

International Letters of Chemistry, Physics and Astronomy, 2013

Homogeneous Polyvinyl alcohol (PVA)/Carbon nanotube (CNT) composite has been prepared by solution... more Homogeneous Polyvinyl alcohol (PVA)/Carbon nanotube (CNT) composite has been prepared by solution casting method using gum acacia as a surfactant. CNT content in the composite was varied from 5-10% by weight. The thermal properties of PVA/CNT composites were investigated by Thermo Gravimetric/Differential Thermal Analyzer (TG/DTA) and Thermo Mechanical Analyzer (TMA). TG/DTA results showed that higher thermal stability in higher percentage of CNT in the composites. The 10% CNT containing PVA composite exhibit highest onset of melting, glass transition point and offset of melting temperature and the recoded values are 330.4K, 379K and 421.3K respectively. All of the result indicates that the developed PVA/CNT composite might be promising for use in solar cell application

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Research paper thumbnail of Development of Electrically Conductive Nanocrystalline Thin Film for Optoelectronic Applications

International Letters of Chemistry, Physics and Astronomy, 2013

Sodium alginate (TiO2) sand composites were prepared by solution casting. Purified sand was added... more Sodium alginate (TiO2) sand composites were prepared by solution casting. Purified sand was added in the composite films to increase electrical conductivity. Electrical properties such as conductivity, capacitance, dielectric constant, and loss tangent of the composites were investigated. The current voltage characteristics for all the composites showed ohmic behavior. All the electrical properties have been found to improve with the incorporation of sand (SiO2) but 6% sand containing composite exhibits the best electrical properties. The mechanical properties tensile strength (TS), elongation at break (Eb) and Young modulus for 6% sand containing composite film are found to be 4.445 MPa, 9.76%, and 72.8 MPa respectively. The experimental results reveal that the blended films exhibit higher stability and improved mechanical properties of both tensile strength and elongation at break in dry state. Water absorption properties of the composites are found to decrease with the increase o...

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Research paper thumbnail of Effect of intraarticular steroid injection in addition to physical modalities in osteoarthritis knee

Journal of Dhaka Medical College, 2015

Context: Osteoarthritis (OA) is the most common form of arthritis accounting for about 30% of gen... more Context: Osteoarthritis (OA) is the most common form of arthritis accounting for about 30% of general physician visits. Intrarticular (IA) corticosteroid injections have been used for decades in clinical practice for pain relief and control of local inflammation in OA. In the present study a combined therapy of long acting intra-articular injection in addition to physical modalities of OA knee was given to find out the functional improvement and clinical outcome of the patient. Methods: It was a prospective interventional non-randomized clinical study conducted in the Department of Physical Medicine & Rehabilitation, Bangabandhu Sheikh Mujib Medical University (BSMMU), Dhaka, from October, 2011 to March, 2012. Fifty four patients between 35 and 75 years without consideration of gender with a history of not less than three months knee pain with radiographic confirmation of primary osteoarthritis were selected purposefully. Then they were divided randomly in group A and B, having 27 p...

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Research paper thumbnail of Efficacy of baclofen in combination with intensive rehabilitation in spastic cerebral palsy- a randomized clinical trial

Journal of Dhaka Medical College, 2015

Objective: To find out the combined efficacy of baclofen and intensive rehabilitation in the trea... more Objective: To find out the combined efficacy of baclofen and intensive rehabilitation in the treatment of spastic cerebral palsy. Methods: This randomized clinical trial was conducted over 60 patients in Dhaka Medical College Hospital, Dhaka, between January and December 2011. The patient satisfying the inclusion and exclusion criteria was randomly enrolled into two groups; Group A (case) included 30 patients received only intensive rehabilitation and Group B (control) included 30 patients who received baclofen orally two times daily according to the body weight regularly in combination with intensive rehabilitation 1 hour daily five times a week for 24 weeks. All patients were followed up at 4 weeks interval and were evaluated for a total of 24 weeks. Results: Combination of baclofen and intensive rehabilitation has superior efficacy in reducing tone in spastic cerebral palsy over only rehabilitation measured by using Modified Ashworth scale (p<0.001). Combination of baclofen an...

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Research paper thumbnail of Aetiological Factors of Osteoarthritis: A Review Update

Journal of Current and Advance Medical Research, 2015

Osteoarthritis (OA) is no longer considered ‘degenerative’ or ‘wear and tear’ arthritis; rather i... more Osteoarthritis (OA) is no longer considered ‘degenerative’ or ‘wear and tear’ arthritis; rather involves dynamic biomechanical, biochemical and cellular process. Indeed, the joint damage that occurs in OA is the result of active remodeling involving all the joint structures. Although articular cartilage is at the center of change, OA is viewed as a disease of the entire joint. Traditionally, OA has been viewed as an inevitable degenerative condition of the cartilage. It is currently viewed as a biomechanical and biochemical inflammatory disease of the entire joints. Osteoarthritis (OA) is the most common type of arthritis. Its high prevalence, especially in the elderly, and the high rate of disability related to disease make it a leading cause of disability in the elderly. Because of the aging of Western populations and because obesity, a major risk factor, are increasing in prevalence, the occurrence of osteoarthritis is on the rise. In the United States, osteoarthritis prevalence ...

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Research paper thumbnail of Ethnomedicinal plants of various tribal and folk medicinal practitioners of six localities of Rangamati and Khagrachari districts in Bangladesh

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Research paper thumbnail of In vitro Regeneration Protocol for Anupam and Chini Champa: Two Banana (Musa sapientum) Cultivars of Bangladesh

ABSTRACT Anupam and Chini Chmpa are the two most favored banana (Musa sapientum) cultivars in Ban... more ABSTRACT Anupam and Chini Chmpa are the two most favored banana (Musa sapientum) cultivars in Bangladesh. The fruit, inflorescences and pseudostems are the edible parts and rich in carbohydrate, protein, minerals and vitamins. It’s now a matter for grower to have disease free planting materials in large quantities because of transmission of viral disease through conventional propagation by suckers that reduces banana yield in the country. Our objective of this study was to develop an in vitro method of clonal propagation of these two cultivars. The experimental design was conducted to examine the effect of phytohormones in vitro on these cultivars. For in vitro study, field grown suckers were collected to isolate the meristemic part of the pseudostems and cultured in Murshige and Skoog (MS) medium containing plant growth hormones after surface sterilization by 0.1% HgCl2 containing 6-benzyleaminopurine (BAP), kinetin (Kn), indole-3-acetic acid (IAA) and indole-3-butyric acid (IBA) for six weeks. Buds were sprouted when cultured in MS + BAP [4.5 mg/l] for Chini Champa, and when MS was upplemented with BAP [2.0mg/l] then 75% response was obtained with Anupam. Synergistic effect of cytokinin and auxin was found effective in improving shoot proliferation rate for both the cultivars. In Chini Champa, BAP [5.0 mg/l] + IAA [2.5 mg/l] showed 85% frequency with an average of 1.9±0.09 cm and in Anupam shoot length attained up to 2.9±0.11 cm in MS + BAP [5.0 mg/l] + IAA [1.5 mg/l]. Combination of BAP and Kn was found effective only in Anupam. Tallest shoot (3.5±0.09) was observed in MS + Kn [2.0 mg/l] + IAA [0.25 mg/l]. The regenerated micro-shoots were then cultured to induce roots in MS + IBA [1.0 mg/l]. The plantlets were transplanted in to soil followed by hardening and acclimatization and 85% survival rate was obtained after eight weeks. Our developed protocol can play a role for in vitro studies on banana and as well as can produce plantlets for these cultivars.

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Research paper thumbnail of Effects of SiO2 on Thermal and Optical Properties of Na-alginate/TiO2/SiO2 composite thin films

Sodium alginate (NaC6H7O6)/Titanium dioxide (TiO2) thin films have been successfully developed by... more Sodium alginate (NaC6H7O6)/Titanium dioxide (TiO2) thin films have been successfully developed by depositing SiO2 by using solution casting process at room temperature. The absorbance and transmittance of light had been determined by UV-visible spectroscopy and from transmittance data band gap of the composites were calculated. The smallest band gap of 2.82 eV is found for the 6% SiO2 containing composite while 0% SiO2 containing composite exhibits band gap to be 3.19 eV. Thermal Properties of the films were characterized by thermo gravimetric/differential thermal analyzer (TG/DTA). The experimental results reveal that the blended films exhibit higher stability and improved thermal properties, which suggests the occurrence of interaction detected by FTIR among sodium alginate, TiO2, SiO2, and water molecules in the films. Semiconducting composite thin films have useful applications for solar cells and optoelectronics. Thus, sodium alginate/TiO2/SiO2 nanocomposite films have attracte...

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Research paper thumbnail of Characterization of acid burn victims in two selected health facilities in Dhaka city

Bangladesh Medical Journal, 2014

This descriptive cross sectional study was carried out in Dhaka Medical College Hospital (DMCH) a... more This descriptive cross sectional study was carried out in Dhaka Medical College Hospital (DMCH) and Acid Survivors Foundation (ASF), Dhaka from January to June 2010 among the acid burn patients admitted in DMCH and acid burn victims taking services from ASF to find out the socio-demographic characteristics, physical extent of injury, and to identify the reasons behind acid burn in selected institution in Dhaka city. A total of 112 samples were taken purposively and data were collected by face to face interview. Among the respondents most were female (58.04%). Mean age was 20.3 years and most came from rural and semi-urban areas (91.82%)l. Most of the incident occurred at the mid-night and at the time of sleeping (69.09%). 23% of the respondents lost their partial or full eye sight or hearing or both. Post burn complications developed in old burn patients 75.8%. Most of the victims (83%) faced various type of problems. Among the respondents, 65.2% suffered from superficial burn, 31.2...

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