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Search Results: 1 - 10 of 494856 matches for " K. M. Azam Chowdhury "
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The Prospects of Blue Economy to Promote Bangladesh into a Middle-Income Country  [PDF]
Md. Monjur Hasan, B. M. Sajjad Hossain, Md. Jobaer Alam, K. M. Azam Chowdhury, Ahmad Al Karim, Nuruddin Md. Khaled Chowdhury
Open Journal of Marine Science (OJMS) , 2018, DOI: 10.4236/ojms.2018.83019
Abstract: This paper draws attention to the prospects of sea-based economy to promote Bangladesh in a middle-income country through the sustainable use of marine resources. About three-fourths of the earth is covered by the seas. It plays the vital role in two important functions from ancient time known as the means of communication and the source of huge living and non-living natural resources. At present, the countries are becoming very much concerned about their marine resources to resolve many of the present and future challenges of their economies. Generally for Bangladesh, ocean is contributing a significant role to its overall socio-economic progress through rising up the economic activities across the country and especially to the coastal zone at southern part. This paper investigates how much Bangladesh is capable to take of or handle the challenges to become a middle income country through the Sustainable Development Goals (SDGs). In addition, it has attempted with a closer-look to find out the barriers or limitations of these activities from different angles if exist.
M. Pourmahabadian, M. Adelkhah, K. Azam
Iranian Journal of Environmental Health Science & Engineering , 2008,
Abstract: Heat stress is a common health problem throughout industry. Any heat stress evaluation requires some exposure assessment of climatic conditions, especially air temperature, humidity, and speed, along with the average temperature of the solid surroundings. In this paper workplace environmental climatic parameters were measured and then evaluated by Wet Bulb Globe Temperature, Corrected Effective Temperature, Heat Stress Index, and Allowable Exposure Time indices among 40 workers in a glass manufacturing unit in Tehran. Also, the effect of available heat control devices on heat stress indices was investigated. The results of this study showed that the obtained heat stress index in individual section and press units is exceeded from 100 (in individual section unit: 302.6, in press unit: 283.6). Also, it is found that the mean average of allowable exposure time in individual section and press units were 13.15 and 12.26 minutes exposure for one hour, respectively. No significant relationship was found between environmental parameters in three parts of body regions (height of head, abdomen and ankle) except for measured air velocity in both units (P<0.007). Positive correlation was found between wet bulb globe temperature, corrected effective temperature and heat stress index indices, but negative correlation was found between allowable exposure time and other indices. Mann Whitney non-parametric test revealed significant relationships in wet bulb globe temperature, corrected effective temperature, heat stress index and allowable exposure time indices when metallic shield was used as heat absorber.
Musculoskeletal Symptoms Among Automobile Assembly Line Workers
M. Ghasemkhani,S. Aten,K. Azam
Journal of Applied Sciences , 2006,
Abstract: Concerns were raised about the possibility of a high prevalence of musculoskeletal symptoms among automobile assembly line workers. The aim of this study was to investigate the prevalence of musculoskeletal symptoms among this group. A cross-sectional study of 346 automobile assembly workers and office workers were carried out using a modified version of the Nordic questionnaire. Prevalence was determined by the percent of positive responses to musculoskeletal symptoms lower back tom questions. Odds ratios and 95% confidence intervals were the measures of association between prevalent musculoskeletal symptoms and demographic and were determined by logistic regression. The commonest musculoskeletal symptoms were from the feet (50.0%), low back (47.4%) and wrist/hand (30.1%), which was also the most common reason for missing work (19.4, 17.9 and 8.2%, respectively). Education status in the workers was significantly associated with MSD symptoms. Musculoskeletal symptoms are a significant problem among young automobile assembly line workers at the beginning of their careers. The work-related portion of the injuries and resulting disability is potentially preventable and it is important to identify interventions for reducing work-related musculoskeletal disorders.
Genome Annotation and Comparative Genomics of ORF Virus  [PDF]
A. K. M. Firoj Mahmud, K. M. Zillur Rahman, Shuvra Kanti Dey, Tahsina Islam, Ali Azam Talukder
Advances in Microbiology (AiM) , 2014, DOI: 10.4236/aim.2014.415122
Abstract: ORF virus (ORFV), the etiological agent of contagious pustular dermatitis in small ruminants, belongs to members of the genus Parapoxvirus of the Poxviridae. The genome of the ORFV is dsDNA of 139,962 bp which has about 89% coding region, 63% GC content and codes 130 proteins. There are four unique genes within the genome revealed by homology search of them two posses’ strong regulatory region and transmembrane helices. One of the ORF-039 contains signal peptide indicating the possibilities to be secretory protein coding gene. Comparative genomic analysis reveals significant differences in Bovine Papular Stomatitis Virus (BPSV) strain BV-AR02 and ORFV strain OV-SA00, and these may account for differences in host range. Interspecies sequence variability is observed in all functional classes of genes but is the highest in putative virulence/host range genes. Notably, ORFV contains genes which are homologous of Vaccinia virus. Phylogenetic analysis reveals that although divergent, ORFV virus is distinct from other known mammalian cowpox virus. An improved understanding of Parapoxvirus (PPV) biology will permit the engineering of novel vaccine viruses and expression vectors with enhanced efficacy and greater versatility. The novel vaccine will have a significant role in the economy of a country through the control of disease in an economically important and small ruminant caused by ORFV.
MHD-Conjugate Free Convection from an Isothermal Horizontal Circular Cylinder with Joule Heating and Heat Generation
NHM. A. Azim,M. K. Chowdhury
Journal of Computational Methods in Physics , 2013, DOI: 10.1155/2013/180516
Abstract: The present work is devoted to the numerical study of laminar magnetohydrodynamic (MHD) conjugate natural convection flow from a horizontal circular cylinder taking into account Joule heating and internal heat generation. The governing equations and the associated boundary conditions for this analysis are made nondimensional forms using a set of dimensionless variables. Thus, the nondimensional governing equations are solved numerically using finite difference method with Keller box scheme. Numerical outcomes are found for different values of the magnetic parameter, conjugate conduction parameter, Prandtl number, Joule heating parameter, and heat generation parameter for the velocity and the temperature within the boundary layer as well as the skin friction coefficients and the rate of heat transfer along the surface. It is found that the skin friction increases, and heat transfer rate decreases for escalating value of Joule heating parameter and heat generation parameter. Results are presented graphically with detailed discussion. 1. Introduction Two-dimensional laminar natural convection from a horizontal cylinder under various surface boundary conditions such as isothermal, uniform heat flux, and mixed boundary conditions was investigated by several researchers employing the different numerical techniques. For example, Merkin [1] analysed the free convection boundary layer on an isothermal horizontal cylinder. Kuehn and Goldstein [2] determined numerical solution for the Navier-Stokes equations for laminar natural convection about a horizontal isothermal circular cylinder. They obtained the solutions of the Navier-Stokes and energy equations for natural-convection heat transfer from a horizontal isothermal cylinder and found that boundary layer conditions reached at the lower portion of the cylinder when the Rayleigh number becomes very large. Wang et al. [3] investigated numerical computation of natural convection flow about a horizontal cylinder using splines. They reported some new computations at very high Rayleigh numbers which indicate the existence of attached “separation” vortices in the downstream plume region. The combined effect of conduction and free convection which is known as conjugate free convection has a significant importance in many practical applications. Gdalevich and Fertman [4] investigated conjugate problems of natural convection. Miyamoto et al. [5] investigated the effects of axial heat conduction in a vertical flat plate on free convection heat transfer. They discovered that axial heat conduction in the flat plate
Trend of Age at First Marriage of Women in Tehran Province, Iran and its Comparison with the National Trend, Based on the Health and Disease Survey
M Karimlou,K Mohammad,K Azam,A A Noorbala
Journal of School of Public Health and Institute of Public Health Research , 2007,
Abstract: Background and Aim: The present article attempts to define the current trend for age at first marriage, based on the nationwide Health Survey of 1999 and using the Brass model.Material and Methods: The national Health survey was conducted in 1999 and involved 1/1000 of the total population, selected via cluster sampling (clusters of 8 households each).The sample used for the present study consisted of 16000 women aged 15-49, including 3026 women in Tehran province. Variables used for analysis were current age, marital status, age at first marriage and residential area (urban/rural). The mean age at first marriage for married women was 17.8 years (sd=3.7) for the whole country, and 18.2 years (sd=3.7) for Tehran province.Results: The Brass model fitted to the data revealed a significant decreasing trend for the proportion of married women in all age groups, especially in the 15-19 year-old category. Conclusion: This obviously indicates an upward trend for age at first marriage.
Effect of Chemical Seed Treatment and BAU-Biofungicide on Alternaria Blight (Alternaria brassicae) of Mustard  [PDF]
M. Ahmed, N. N. Tonu, K. Hornaday, F. M. Aminuzzaman, M. S. M. Chowdhury, M. R. Islam
Agricultural Sciences (AS) , 2018, DOI: 10.4236/as.2018.95039
Abstract: The efficacy of three seed treating chemicals viz. Provax 200 WP, Brine solution, Rovral 50 WP and one Biofungicide viz. BAU-Biofungicide were evaluated against Alternaria blight of mustard caused by Alternaria brassicae and Alternaria brassicicola. Three varieties viz. var. BARI-6, Tori-7 and SAU-Shorisha-1 were used in this study. The field experiment was conducted in the farm of Sher-e-Bangla Agricultural University, Dhaka and laboratory experiment was conducted in the seed health Laboratory, Department of Plant Pathology, Sher-e-Bangla Agricultural University, Dhaka-1207 during the period from November 2008 to July 2009. Among the seed treating chemicals, Rovral 50WP showed the best performance in reducing disease incidence and severity as well as increasing seed yield. Application of Rovral 50 WP gave the best result in increasing the number of pod per plant, pod length (cm), number of branch per plant, 100 siliqua weight (g) and 1000 seed weight (g). BAU-Biofungicide also showed promising performance in controlling Alternaria blight of mustard and reduced 36% and 53% disease incidence and disease severity respectively over untreated control. BAU-Biofungicide may be recommended as an alternative means of chemical fungicide such as Rovral 50 WP for controlling Alternaria blight of mustard.
Efficacy of Static and Intermittent Gravity Inverted Therapy Techniques in Improvement of Motor Apraxia and Cognitive Abilities in Autism Spectrum Disorder (ASD)  [PDF]
Ahmed M. Azam
World Journal of Neuroscience (WJNS) , 2018, DOI: 10.4236/wjns.2018.82025
Abstract: This work was carried out to investigate the efficacy of static and intermittent gravity inverted therapy techniques in improvement of motor apraxia and cognitive abilities in Autism Spectrum Disorder (ASD). 30 children were randomly joined in this study into two groups; Group A (sensory integration therapy approach plus static and intermittent inversion therapy techniques) and Group B (sensory integration therapy approach only). Block design test was used to locate and follow constructional apraxia, computerized information processing speed test to locate and follow cognitive processing and grooved pegboard test was used to locate and follow fine motor skills. The variance between pre- and post-treatment results was highly significant in the study group in all variables. By comparison of the two groups in constructional apraxia variables test at post-treatment, there was a highly representative elevation in favour to study groups (p < 0.05). By comparison of the two groups in cognitive processing variable at post-treatment, there was a highly representative elevation in favour to study group (p < 0.05). By comparison of the two groups in fine motor skills variable at post-treatment, there was a highly representative elevation in favor to study group (p < 0.05). According to the outcomes of this study, it can be terminated that the sensory integration therapy approach plus static and intermittent inversion therapy techniques can be recommended in improvement constructional apraxia and cognitive processing abilities in autism spectrum disorder (ASD) children.
M. H. Dehghani, K. Azam, F. Changani, E. Dehghani Fard
Iranian Journal of Environmental Health Science & Engineering , 2008,
Abstract: The management of medical waste is of great importance due to its potential environmental hazards and public health risks. In the past, medical waste was often mixed with municipal solid waste and disposed in residential waste landfills or improper treatment facilities in Iran. In recent years, many efforts have been made by environmental regulatory agencies and waste generators to better managing the wastes from healthcare facilities. This study was carried in 12 educational hospitals of Tehran University of Medical Sciences. The goals of this study were to characterize solid wastes generated in healthcare hospitals, to report the current status of medical waste management and to provide a framework for the safe management of these wastes at the considered hospitals. The methodology was descriptive, cross-sectional and consisted of the use of surveys and interviews with the authorities of the healthcare facilities and with personnel involved in the management of the wastes. The results showed that medical wastes generated in hospitals were extremely heterogeneous in composition. 42% of wastes were collected in containers and plastic bags. In 75% of hospitals, the stay-time in storage sites was about 12-24h. 92% of medical wastes of hospitals were collected by covered-trucks. In 46% of hospitals, transferring of medical wastes to temporary stations was done manually. The average of waste generation rates in the hospitals was estimated to be 4.42kg/bed/day.
The Study of the Status of Electromagnetic Waves Resulting from BTS (Base Transceiver Station), 900 Megahertz Frequency in Tehran
P Nasiri,M.R Monazam,S Zare,K Azam
Iranian Journal of Health and Environment , 2011,
Abstract: Background and Objectives: with the developments of technology, contact with various frequencies of electromagnetic fields ( EMF ) has significantly increased, while the abundant benefits of using microwaves in routine life cannot be neglected. During recent years there have been reports of adverse effects caused by contact with electric and magnetic fields of these waves that spread from BTS antennas. The purpose of this study is the measurement of microwaves spreading around BTS antennas in Tehran.Materials and Methods: according to the location of BTS antennas in Tehran , power density of electromagnetic waves around 63 antennas in near and distant fields in different distances was measured. The measurements were performed using the standard method of IEEE Std C95.1 by Hi-4333 device .in order to analysis data we used spss 16 and descriptive and deductive statistical tests.Results: results of this study show that in the near field, with increase of distance from the foot of antenna , the average power density of electromagnetic waves increase in a way that in the distance of 10 meters from the antenna foot , the increase of average power density is hardly conceivable and from 10 to 15 meters distance is perfectly noticeable. But in the distant field, with increase of distance from 20 meters, the average power density of the electromagnetic waves decreases; and from 100 meter and further, the gradient of the diagram will get almost linear and the rate of power density reaches the base limit in a way that with the increase of distance there would be no significant decrease.Conclusion: All the measures of power density of electromagnetic waves caused by BTSs are about 0.06% of recommended measures of environmental standards and 0.0000013% of occupational standards. The results of this study are close to the results of other studies.
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