Dhaka, Bangladesh
Dhaka, Bangladesh

Jahangirnagar University is a public university in Bangladesh, located in Savar Upazila, Dhaka. It is the only one fully residential university in Bangladesh.The university was established in 1970 by the government of Pakistan by the Jahangirnagar Muslim University Ordinance, 1970. During the first two years, it operated as a project. Its first Vice-Chancellor, Professor Mafiz Uddin Ahmad took up office on September 24, 1970. The first group of students, a total of 150, was enrolled in four departments: Economics, Geography, Mathematics and Statistics. Its formal inauguration was delayed until January 12, 1971, when the university was launched by Rear Admiral S. M. Ahsan, the Chancellor.Until 1973, it operated as a project. In 1973 Jahangirnagar Muslim University Act was amended as Jahangirnagar University Act.In 2014 the university had a total of 14,500 students, 672 teachers, 206 staffs and 1,200 other employees. The university boasts to have the first ever female Vice-Chancellor of any public university in Bangladesh. Dr Farzana Islam, a professor of Anthropology department, was appointed the country’s first-ever female Vice Chancellor of Jahangirnagar University on Sunday, March 02, 2014 for four years. Wikipedia.

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Mamun A.A.,Jahangirnagar University | Zobaer M.S.,Bangladesh University of Textiles
Physics of Plasmas | Year: 2014

The properties of ion-acoustic shock waves and double layers propagating in a viscous degenerate dense plasma (containing inertial viscous ion fluid, non-relativistic and ultra-relativistic degenerate electron fluid, and negatively charged stationary heavy element) is investigated. A new nonlinear equation (viz. Gardner equation with additional dissipative term) is derived by the reductive perturbation method. The properties of the ion-acoustic shock waves and double layers are examined by the analysis of the shock and double layer solutions of this new equation (we would like to call it "M-Z equation"). It is found that the properties of these shock and double layer structures obtained from this analysis are significantly different from those obtained from the analysis of standard Gardner or Burgers' equation. The implications of our results to dense plasmas in astrophysical objects (e.g., non-rotating white dwarf stars) are briefly discussed. © 2014 AIP Publishing LLC.

Bashar K.,Jahangirnagar University | Tuno N.,Kanazawa University
Parasites and Vectors | Year: 2014

Background: The relationship between climatic factors and mosquito abundance is very important to determine parasite activity levels and, therefore, disease risk. Therefore, this study was conducted to investigate the seasonal abundance of anophelines and their association with meteorological variables and disease transmission in two malaria endemic areas of Bangladesh. Methods: Monthly sampling was done from both indoors and outdoors in 12 selected houses using light traps (LTs) and pyrethrum spray (PS) during January, 2011 to January, 2012 in two malaria endemic areas of Bangladesh. Outdoor rainfall, temperature, and relative humidity data of the study areas were collected from the meteorological department of Bangladesh. Mosquitoes were killed with chloroform and identified morphologically under stereoscopic microscopes using taxonomic keys. Samples were tested for CSP of P. falciparum, P. vivax 210 and P. vivax 247 using ELISA. Pearson correlation and canonical correspondence analyses (CCA) were computed to investigate the associations with species abundance and rainfall, temperature, humidity and malaria cases. Results: A total of 2,443 female anophelines, representing 22 species were captured. Every female Anopheles were tested for P. falciparum, P. vivax 210 and P. vivax 247 CSP, of which 10 species were found positive. The CSP positive species were An. annularis, An. baimaii, An. barbirostris, An. jeyporiensis, An. karwari, An. minimus s.l., An. philippinensis, An. umbrosus, An. vagus and An. wilmori. Anopheles vagus and An. philippinensis were the dominant species present almost throughout the year with highest peaks in March and smallest peaks in September but An. baimaii and An. willmori were found during monsoon (July-September) only. Lag rainfall and relative humidity were the most significant variables influencing An. baimaii, An. willmori, An. vagus, and An. subpictus density in Kumari area. Abundance of these four species positively related to malaria cases. The effects of temperature were not found as a significant variable on the abundance of anophelines mosquitoes in Bangladesh. Conclusions: Our study demonstrates that the nature of relationship between malaria vector and climatic variables were multifaceted. Detailed studies of vector bionomics, continuous monitoring and malaria transmission dynamics is essential for predicting disease outbreaks and vector control in the region. © 2014 Bashar and Tuno; licensee BioMed Central Ltd.

Bloch H.,Curtin University Australia | Rafiq S.,Jahangirnagar University | Salim R.,Curtin University Australia
Energy Economics | Year: 2012

This article investigates the relationship between coal consumption and income in China using both supply-side and demand-side frameworks. Cointegration and vector error correction modeling show that there is a unidirectional causality running from coal consumption to output in both the short and long run under the supply-side analysis, while there is also a unidirectional causality running from income to coal consumption in the short and long run under the demand-side analysis. The results also reveal that there is bi-directional causality between coal consumption and pollutant emission both in the short and long run. Hence, it is very difficult for China to pursue a greenhouse gas abatement policy through reducing coal consumption. Switching to greener energy sources might be a possible alternative in the long run. © 2011 Elsevier B.V.

Salim R.A.,Curtin University Australia | Rafiq S.,Jahangirnagar University
Energy Economics | Year: 2012

This article analyses the determinants of renewable energy consumption in a panel of six major emerging economies, namely Brazil, China, India, Indonesia, Philippines and Turkey that are proactively accelerating the adoption of renewable energy. Using Fully modified ordinary least square (FMOLS), Dynamic ordinary least square (DOLS), and Granger causality methods this paper finds that in the long-run, renewable energy consumption is significantly determined by income and pollutant emission in Brazil, China, India and Indonesia while mainly by income in Philippines and Turkey. Causal link between renewable energy and income; and between renewable energy and pollutant emission are found to be bidirectional in the short-run. These results suggest that the appropriateness of the efforts undertaken by emerging countries to reduce the carbon intensity by increasing the energy efficiency and substantially increasing the share of renewable in the overall energy mix. © 2011 Elsevier B.V.

Condensation of salicyldehyde with (R or S)-2-amino-2-phenylethanol or rac-2-amino-1-phenylethanol gives enantiopure (R or S)-2-(salicylaldimine)-2- phenylethanol (R- or S-H 2L1) or (rac)-2-(salicylaldimine)-1- phenylethanol (rac-H 2L2). The Schiff bases coordinate to [Rh(η 4- cod)(μ-O 2CCH 3)] 2 to afford mononuclear [Rh(η 4-cod){(R or S)-2-(salicylaldiminato)-2- phenylethanol-κ 2N,O}], [Rh(η 4-cod)(R- or S-HL1)] (1 or 2), or [Rh(η 4-cod){(rac)-2-(salicylaldiminato)- 1-phenylethanol-κ 2N,O}], [Rh(η 4-cod)(rac-HL2)] (3). The Schiff base and complexes are characterized by IR-, UV/Vis-, 1H/ 13C-NMR-, mass-spectroscopy, circular dichroism (CD), and polarimetry. The synthetic and spectroscopic results suggest that deprotonated Schiff base coordinates to [Rh(η 4-cod)] as a six-membered N,O-chelate with distorted square planar geometry at rhodium. CD and polarimetry measurements show the enantiopurity of the Schiff bases as well as the complexes in solution. The in situ system composed of [Rh(η 4-cod)Cl] 2 and S-H 2L1 has been used as a catalyst for the reduction of acetophenone into rac-1-phenylethanol with 85% conversion in diphenylsilane at 0-5°C. © 2012 Taylor & Francis.

Karim F.,Jahangirnagar University | Fakhruddin A.N.M.,Jahangirnagar University
Reviews in Environmental Science and Biotechnology | Year: 2012

Phenol and its derivatives are widespread contaminants whose sources are both natural and industrial. Phenol is massively produced and used as a starting material for synthetic polymers and fibers. Although phenolic compounds play important biochemical and physiological roles in living systems, their accumulation in the environment as a result of intensive human activity may result in drastic ecological problem. Various analytical techniques are available for the detection of phenol in environmental samples. But they need complex sample pre-treatment so as are time consuming, costly and use heavy devices. On the other hand a biosensor is a device that gives rapid detection, cost effective and easy. A review study was carried out to accumulate the possible biosensors for the detection of phenolic compounds in environmental samples. A number of biological components including microorganisms, enzymes, antibodies, antigens, nucleic acids etc. can be used for the construction of biosensors that was found to detect phenolic compounds. Of all type of biological components microorganisms and enzymes are mostly used. The microorganisms are Pseudomonas, Moraxella, Arthrobacter, Rhodococcus, and Trichosporon. The most used enzymes are tyrosinase, peroxidase, laccase, glucose dehydrogenase, cellobiose dehydrogenase etc. Antibody sensors can detect a very trace level. The biorecognition of DNA biosensors occur by hybridization of DNA. Biosensors are found to work well when the biological sensing element is immobilized. A variety of immobilization techniques were found to use as adsorption, covalent binding, entrapment, cross-linking etc. For immobilization the matrices used was polyvinyl alcohol, Osmium complex, nafion/sol-gel silicate, chitosan, silica gel etc. © 2012 Springer Science+Business Media B.V.

Hossen M.R.,Jahangirnagar University | Mamun A.A.,Jahangirnagar University
Brazilian Journal of Physics | Year: 2014

The nonlinear propagation of cylindrical and spherical modified ion-acoustic (mIA) waves in an unmagnetized, collisionless, relativistic, degenerate multispecies plasma has been investigated theoretically. This plasma system is assumed to contain both relativistic degenerate electron and positron fluids, nonrelativistic degenerate positive and negative ions, and positively charged static heavy ions. The restoring force is provided by the degenerate pressures of the electrons and positrons, whereas the inertia is provided by the mass of positive and negative ions. The positively charged static heavy ions participate only in maintaining the quasi-neutrality condition at equilibrium. The nonplanar K-dV and mK-dV equations are derived by using reductive perturbation technique and numerically analyzed to identify the basic features (speed, amplitude, width, etc.) of mIA solitary structures. The basic characteristics of mIA solitary waves are found to be significantly modified by the effects of degenerate pressures of electron, positron, and ion fluids, their number densities, and various charge states of heavy ions. The implications of our results to dense plasmas in astrophysical compact objects (e.g., nonrotating white dwarfs, neutron stars, etc.) are briefly mentioned. © 2014, Sociedade Brasileira de Física.

Asaduzzaman M.,Jahangirnagar University | Mamun A.A.,Jahangirnagar University
Physical Review E - Statistical, Nonlinear, and Soft Matter Physics | Year: 2012

A rigorous theoretical investigation has been made of the effects of nonthermal ions and polarization force (which arises due to the dust density inhomogeneity) on the propagation of dust-acoustic (DA) waves in a density-varying unmagnetized dusty plasma (consisting of nonthermal ions, Maxwellian electrons, and negatively charged mobile dust) by the normal mode analysis. It has been shown that the dispersion properties of the DA waves are significantly modified by the presence of nonthermal ions and polarization force. It has been also found that the phase speed of the DA waves, as well as the dust density perturbation, increases (decreases) with the increase of nonthermal ions (polarization force), and that the potential associated with the DA waves decreases with the increase of the equilibrium dust number density. The implications of our results in the specific situation of space environments (dust-ion plasma situation) are also briefly discussed. © 2012 American Physical Society.

Mannan A.,Jahangirnagar University | Mamun A.A.,Jahangirnagar University
Physical Review E - Statistical, Nonlinear, and Soft Matter Physics | Year: 2011

The nonlinear propagation of Gardner solitons (GSs) in a nonplanar (cylindrical and spherical) four-component dusty plasma (composed of inertial positively and negatively dust, Boltzmann electrons, and ions) is studied by the reductive perturbation method. The modified Gardner equation is derived and numerically solved. It has been found that the basic characteristics of the dust-acoustic (DA) GSs, which are shown to exist for μ around its critical value μc [where μ=Zdpmdn/Z dnmdp, Zdn (Zdp) is the number of electrons (protons) residing on a negative (positive) dust, mdp (mdn) is the mass of the positive (negative) dust, μc is the value of μ corresponding to the vanishing of the nonlinear coefficient of the Korteweg-de Vries (KdV) equation, e.g., μc 0.174 for μe=ne0/Zdnndn0=0.2, μi=ni0/Zdnndn0=0.4, and σ=Ti/Te=0.1, ne0, ni0, and ndn0 are, respectively, electron, ion, and dust number densities, and Ti (Te) is the ion (electron) temperature], are different from those of the KdV solitons, which do not exist for μ around μc. It has been also found that the propagation characteristics of nonplanar DA GSs significantly differ from those of planar ones. © 2011 American Physical Society.

Condensation of X-benzaldehyde with (R)-2-amino-2-phenylethanol gives the enantiopure Schiff bases (R)-2-(X-benzaldimine)-2-phenylethanol (X = H, HL1; 2,4-dimethoxy, HL2). The Schiff bases coordinate with dinuclear [Rh(η4-cod)(μ-O2CCH3)]2 to afford the cationic complexes [Rh(η4-cod){(R)-2-(benzaldimine)-2- phenylethanol-κ2N,O}](acetate), [Rh(η4-cod)(HL1) ](ac) (1) and [Rh(η4-cod){(R)-2-(2,4-dimethoxy-benzaldimine)-2- phenylethanol-κ2N,O}](acetate), [Rh(η4-cod)(HL2) ](ac) (2), respectively. The Schiff bases and complexes are isolated as solids in good yields and characterized by elemental analysis, IR, UV-Vis, 1H/13C-NMR, mass spectroscopy, and polarimetry. © 2011 Taylor & Francis.

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