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Articles by M.R. Amin
Total Records ( 6 ) for M.R. Amin
  Md. Shahriar Karim , Md. Imdadul Islam , Adnan Rab , Md. Rakibul Hasan and M.R. Amin
  Most of the traffic in telecommunication networks follows exponential arrival and exponential service time distribution like M/M/n/K. In wireless packet communications, the data streams are fragmented into different cells or packets and then sent over the air interface. For such a system, the service time of each cell or packet is fixed. Hence the deterministic service time traffic, like M/D/n/K, is applicable to detect traffic parameters in packet communication. In this study, an effort has been made to give an overview of the traffic model M/D/n/K. Here the performance of the model is evaluated along with the probability state distribution. The study have also designed a traffic model of single channel M/D/1 and M/D/1/K to evaluate network performance in their own way.
  B.C. Roy , M.R.I. Khan , M.M. Rahman , Mohamad Amran Mohd. Salleh , Amimul Ahsan and M.R. Amin
  Massive amount of rumen content and blood were produced from the slaughtered animal in a single day of Eid-ul-Azha in Bangladesh that creates an unhygienic and hazardous environment at that time. A convenient composting method can efficiently utilized these rumen contents and blood. For this purpose, three different treatments mentioned as rumen content only (T1), rumen content with biogas slurry (T2) and rumen content with cattle blood (T3) were studied with 3 replications for anaerobic composting. The parameters studied were Organic Matter (OM), Crude Protein (CP), Carbon Nitrogen ratio (C/N ratio), Crude Fiber (CF), Ether Extract (EE), Nitrogen Free Extract (NFE), ash and pH. The result revealed that amount of CP was higher in T3 (17.43%) followed by T2 (16.27%) after 90 days of anaerobic composting and the differences were significant (p<0.01) among treatment groups. Initial and final C/N ratios were 33.46 and 31.42, 27.66 and 23.88 and 27.93 and 22.83 in case of T1, T2 and T3, respectively. Final C/N ratio showed the significant difference (p<0.01) among different treatment groups. The pH of the final compost was significantly increased in T3 (22%) followed by T2 (20%).
  M. Hasanuzzaman , B.K. Biswas , M.S. Alam , H.F. El-Taj and M.R. Amin
  A total of 33 indigenous cultivars of sorghum [Sorghum bicolor (L.) Moench] were grown in replicated trial during rabi season of 1999 to assess genetic divergence based on ten developmental characters. The genotypes were grouped into five clusters. Amongst ten characters, grains/panicle paid maximum contribution towards genetic divergence. The inter-group distances were much longer than the intra-group distances. Cluster III was the largest with 11 genotypes and the cluster II was the smallest with 2 genotypes. Cluster III showed the maximum genetic distance (207.43) from cluster V. Simultaneous consideration of intercluster and intra cluster distances 7 genotypes of cluster I were genetically worthful to initiate the crossing programme for high heterotic effects in segregants. Cluster II exhibited the maximum intra cluster distance (3.15) and had considerable genetical divergence from rest of the clusters. Thus, 2 genotypes belonging to cluster II might be hybridized with the genotypes of other clusters for getting desirable improvement of specific traits in sorghum.
  F. Akhtar , A.B.M.M. Islam and M.R. Amin
  Selection for growth at 6 months of age in Black Bengal goats was practiced to improve the growth and production performance. Selection was done for three generations. Two groups were maintained simultaneously, selected group and control group. The birth weight of selected group (0.98 kg) was significantly (p<0.01) higher than the control group (0.85 kg). Body weights in selected group at 3, 6, 9, 12 months were 4.85, 8.11, 10.68 and 15.49 kg and that of control group were 4.36, 6.86, 9.76 and 13.52 kg, respectively having significant differences (p<0.05). The reproductive performance and survivability were also studied to predict the extent of correlated response on them as a result of selection for growth. Age at first service was 281 days in selected line and that of random bred was 265 days. The weight at first service were 10.96 and 9.32 kg, respectively in selected and control lines. The number of service per conception of two groups were 1.17 and 1.19, respectively in selected and control does. Litter size of goats was 2.10 and 1.93 in selected and control lines, respectively. The kidding interval in selected does was lower (233.47 days) than that of random bred (274.60 days). The litter weight in selected and control kids were 1.62 and 1.42 kg, respectively. The pre-weaning kid survivability (%) of selected and control lines upto 60 days were 87.4 and 89.3, respectively. From the results, it was concluded that selection for growth at 6 months in Black Bengal goats substantially improved growth efficiency and production performance without affecting fertility and fitness.
  M.R. Amin , M.F.A. Mollah , K. Taslima and Muhammadullah
  The experiment was conducted to investigate the morphological status of the critically endangered riverine catfish Rita rita using morphometric and meristic traits. About 158 species of Rita were collected from the old Brahmaputra river in Mymensingh district and were studied in the laboratory of the Fisheries Biology and Genetics Department, Bangladesh Agricultural University. Measurement of length and weight of Rita were recorded by using measuring scale and electric balance respectively. Significant curvilinear relationship existed between total length and other morphometric characters and between head length and other characters of the head. Relationships between total length and various body measurements of the fish were highly significant (p<0.01) except the relationship between total length and pelvic fin length of male fish (p<0.05). In case of meristic characters-dorsal fin rays, pelvic fin rays, pectoral fin rays, anal fin rays, caudal fin rays, number of vertebrae and branchiostegal rays were found to be more or less similar except slight differences. The values of condition factors (k) in the total length body-weight relationships for female and male were found to be 0.41 and 0.38, respectively. The mean values of relative condition factors (kn) were 1.0 and 1.005 for female and male, respectively.
  S. M. E. Hassan , M.Sq. Rahman , M. F. Hossain , M.R. Amin and M. M. Alam
  An investigation was carried out to ascertain the effect of planting density and nitrogen on the performance of kaon. The planting density was regulated by the seed rate per hectare. Four different seed rates (4, 6, 8 and 10 kg ha–1) and five nitrogen levels (0, 15, 30 and 60 ka ha–1) were used for this study. The result of the study revealed that the planting density significantly influenced the yield and yield contributing characters such as plant population per square meter, plant height, number of tiller per plant, effective tiller per plant, grains per panicles, grain and straw yields. Nitrogen too significantly influenced the yield and yield contributing characters except plant population per square meter. The maximum grain yield (1.98 t ha–1). The dose of 60 kg N ha-1 produced the highest grain yield (1.87 t ha–1) and it was statistically similar to 45 kg N ha–1 (1.82 ha–1). The interaction effect due to seed rates and nitrogen levels showed significant influence on effective tiller per plant, grain and straw yield and harvest index. The combination of 10 kg seed and 60 kg nitrogen per hectare produced the highest grain yield (2.15 t ha–1).
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