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Bhairab Bazar, Bangladesh

Uttara University or is a private university at Uttara, in Dhaka, Bangladesh. UU has eight campuses in a one-kilometer radius in Uttara, and another campus in Mirpur-1. Wikipedia.

Ahmed Z.U.,Cornell University | Panaullah G.M.,Uttara University | Gauch Jr. H.,Cornell University | McCouch S.R.,Cornell University | And 3 more authors.
Plant and Soil | Year: 2011

Genetic analysis of 38 rice varieties released by the Bangladesh Rice Research Institute (BRRI) identified 34 as indica, 2 as admixed between indica and aus, and 4 as belonging to the aromatic/Group V subpopulation. Indica varieties developed for the two major rice-growing seasons, the wet monsoon (aman) and the dry winter (boro), were not genetically differentiated. The Additive Main Effect and Multiplicative Interaction (AMMI) model was used to assess the effect of genotype (G), environment (E) and genotype-environment interaction (GEI) on grain arsenic (As) concentration when these rice varieties were grown at ten BRRI research stations located across diverse agro-ecological zones in Bangladesh. G, E and GEI, significantly influenced grain As concentration in both seasons. Overall, E accounted for 69%-80%, G 9%-10% and GEI 10%-21% of the observed variability in grain As. One site, Satkhira had the highest mean grain As concentration and the largest interaction principle component analysis (IPCA) scores in both seasons, indicating maximum interaction with genotypes. Site effects were more pronounced in the boro than in the aman season. The soil level of poorly crystalline Fe-oxide (AOFe), the ratio of AOFe to associated As, soil phosphate extractable As and soil pH were important sub-components of E controlling rice grain As concentration. Irrespective of environment, the mean grain As concentration was significantly higher in the boro (0.290 mg As kg-1) than in the aman (0.154 mg As kg-1) season (p < 0.0001), though the reasons for this are unclear. Based on mean grain As concentration and stability across environments, the variety BR3 is currently the best choice for the boro season, while BR 23 and BRRI dhan 38 are the best choices for the aman season. Popular varieties BR 11 (aman) and BRRI dhan 28 and 29 (boro) had grain As concentrations close to the mean value and were fairly stable across environments, while high-yielding, short-duration aman season varieties (BRRI dhan 32, 33 and 39) developed for intensified cropping had relatively high grain As concentrations. Results suggest that genetic approaches to reducing As in rice grain will require the introduction of novel genetic variation and must be accompanied by appropriate management strategies to reduce As availability and uptake by rice. © 2010 Springer Science+Business Media B.V. Source

Islam M.D.,Uttara University | Mondol A.S.,Rhine-Waal University of Applied Sciences
8th International Conference on Electrical and Computer Engineering: Advancing Technology for a Better Tomorrow, ICECE 2014 | Year: 2015

This paper introduces a new clinical thermometer named as 'Braille Thermometer' which will be used for measuring the body temperature of patients who are blind and also have hearing problem (deaf-blind). It is actually a microcontroller based device which collects temperature through a temperature sensor and indicates this temperature in a dial which is marked in Braille numbers. In this paper, the temperature readings of the Braille thermometer are also crosschecked with the readings of a clinical thermometer where input temperature was taken from the same source. © 2014 IEEE. Source

Hasan M.M.,Uttara University | Hasan M.R.,Primeasia University | Tabassum R.,Grameenphone Ltd.
2nd International Conference on Electrical Engineering and Information and Communication Technology, iCEEiCT 2015 | Year: 2015

In this paper, design and analysis of a rectangular microstrip patch antenna with two U-shaped slots for multi operating bands of wireless communication systems have been presented. The proposed antenna is placed on the substrate of Taconic TLY-5 dielectric material and excited by 50Ω microstrip feed line. The operating bands are centered at 1.60GHz, 2.40GHz, 4.27GHz, 5GHz, 6GHz, 8.1GHz and 9.2 GHz. In this work, GEMS Simulator is used as the software environment in order to design and analyze the performance of antenna. In addition, the return loss of the designed antenna has been analyzed by varying slot width. Based on the results and analysis, it is noticed that the antenna shows better performance when the widths of the first and second slots are 5mm and 5.8mm respectively. Moreover, the directivity, gain and 3D radiation patterns of the designed antenna are acceptable for wireless communication. © 2015 IEEE. Source

Ahmed Z.U.,Cornell University | Panaullah G.M.,Uttara University | DeGloria S.D.,Cornell University | Duxbury J.M.,Cornell University
Science of the Total Environment | Year: 2011

Knowledge of the spatial correlation of soil arsenic (As) concentrations with environmental variables is needed to assess the nature and extent of the risk of As contamination from irrigation water in Bangladesh. We analyzed 263 paired groundwater and paddy soil samples covering highland (HL) and medium highland-1 (MHL-1) land types for geostatistical mapping of soil As and delineation of As contaminated areas in Tala Upazilla, Satkhira district. We also collected 74 non-rice soil samples to assess the baseline concentration of soil As for this area. The mean soil As concentrations (mg/kg) for different land types under rice and non-rice crops were: rice-MHL-1 (21.2) > rice-HL (14.1) > non-rice-MHL-1 (11.9) > non-rice-HL (7.2). Multiple regression analyses showed that irrigation water As, Fe, land elevation and years of tubewell operation are the important factors affecting the concentrations of As in HL paddy soils. Only years of tubewell operation affected As concentration in the MHL-1 paddy soils. Quantitatively similar increases in soil As above the estimated baseline-As concentration were observed for rice soils on HL and MHL-1 after 6-8. years of groundwater irrigation, implying strong retention of As added in irrigation water in both land types. Application of single geostatistical methods with secondary variables such as regression kriging (RK) and ordinary co-kriging (OCK) gave little improvement in prediction of soil As over ordinary kriging (OK). Comparing single prediction methods, kriging within strata (KWS), the combination of RK for HL and OCK for MHL-1, gave more accurate soil As predictions and showed the lowest misclassification of declaring a location "contaminated" with respect to 14.8. mg As/kg, the highest value obtained for the baseline soil As concentration. Prediction of soil As buildup over time indicated that 75% or the soils cropped to rice would contain at least 30. mg/L As by the year 2020. © 2011 Elsevier B.V. Source

Islam C.S.,Uttara University
2015 18th International Conference on Computer and Information Technology, ICCIT 2015 | Year: 2015

The goal of this paper is to design a new interference alignment (IA) precoders and decoders algorithm capable of finding perfect alignment solutions which is similar to the AltMin-IA in terms of convergence speed and reliability. Finally, extended the AltMin-IA algorithm to incorporate the rank constraint in the form of a minimum eigenvalue condition, and a transmit power constraint, which results in a generalized eigenvalue problem at each step of the alternating optimization procedure. In the interference channel (IC), K transmitter-receiver pairs exploit the channel state information (CSI) to jointly design their transmit strategies. Specifically here, consider orthogonal frequency-division multiplexing (OFDM) transmissions, where the application of existing IA algorithms require an additional level of cooperation; time synchronization. To avoid such demand, apply the precoders and decoders at the sample level in the time domain, which allows the users to transmit asynchronously. © 2015 IEEE. Source

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