Author
Shafiqul Islam
Other affiliations: Khalifa University, Harvard University, Tufts University ...read more
Bio: Shafiqul Islam is an academic researcher from Xavier University of Louisiana. The author has contributed to research in topics: Adaptive control & Lyapunov function. The author has an hindex of 42, co-authored 206 publications receiving 7637 citations. Previous affiliations of Shafiqul Islam include Khalifa University & Harvard University.
Papers published on a yearly basis
Papers
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TL;DR: The results of field injection of molasses, nitrate, and low-arsenic water show that organic carbon or its degradation products may quickly mobilize arsenic, oxidants may lower arsenic concentrations, and sorption of arsenic is limited by saturation of aquifer materials.
Abstract: High levels of arsenic in well water are causing widespread poisoning in Bangladesh. In a typical aquifer in southern Bangladesh, chemical data imply that arsenic mobilization is associated with recent inflow of carbon. High concentrations of radiocarbon-young methane indicate that young carbon has driven recent biogeochemical processes, and irrigation pumping is sufficient to have drawn water to the depth where dissolved arsenic is at a maximum. The results of field injection of molasses, nitrate, and low-arsenic water show that organic carbon or its degradation products may quickly mobilize arsenic, oxidants may lower arsenic concentrations, and sorption of arsenic is limited by saturation of aquifer materials.
1,179 citations
TL;DR: In this paper, a simple scheme to estimate surface evaporation over large heterogeneous areas using remote sensing data is proposed, which is based on an extension of the Priestley-Taylor equation and a relationship between remotely sensed surface temperature and vegetation index.
Abstract: We propose a simple scheme to estimate surface evaporation over large heterogeneous areas using remote sensing data. Our approach is based on an extension of the Priestley-Taylor equation and a relationship between remotely sensed surface temperature and vegetation index. The required parameters for this approach are derived from advanced very high resolution radiometer NOAA 14 data over the southern Great Plains (SGP) in 1997. Compared to ground flux observations by the Atmospheric Radiation Measurement program, our six case studies varying from early spring to late summer over the SGP domain show that the proposed method provides better estimation accuracy for surface evaporation than the original Priestley-Taylor method. It appears that the proposed method can estimate evaporation over large areas with significantly less complexity than that of the traditionally used residual method based on aerodynamic resistance. The uncertainty in the estimation of surface evaporation for the proposed approach is closely related to the inaccuracy in deriving net radiation and soil heat flux from remote sensing data. Results suggest that the proposed approach is more reliable and easily applicable for operational estimation of evaporation over large areas where ground-based data are not readily available.
429 citations
340 citations
TL;DR: In this paper, the authors studied the complex transient patterns of groundwater flow that flush solutes from aquifers and carry solutes into the subsurface of Bangladesh's underground aquifer.
310 citations
TL;DR: Aquifer geochemical profiles of aqueous and solid phase parameters were measured in a field site in the Munshiganj district of Bangladesh where the groundwater is severely contaminated by As as discussed by the authors.
291 citations
Cited by
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Journal Article•
TL;DR: In this article, the authors present a document, redatto, voted and pubblicato by the Ipcc -Comitato intergovernativo sui cambiamenti climatici - illustra la sintesi delle ricerche svolte su questo tema rilevante.
Abstract: Cause, conseguenze e strategie di mitigazione Proponiamo il primo di una serie di articoli in cui affronteremo l’attuale problema dei mutamenti climatici. Presentiamo il documento redatto, votato e pubblicato dall’Ipcc - Comitato intergovernativo sui cambiamenti climatici - che illustra la sintesi delle ricerche svolte su questo tema rilevante.
4,187 citations
01 Jan 2004
TL;DR: Comprehensive and up-to-date, this book includes essential topics that either reflect practical significance or are of theoretical importance and describes numerous important application areas such as image based rendering and digital libraries.
Abstract: From the Publisher:
The accessible presentation of this book gives both a general view of the entire computer vision enterprise and also offers sufficient detail to be able to build useful applications. Users learn techniques that have proven to be useful by first-hand experience and a wide range of mathematical methods. A CD-ROM with every copy of the text contains source code for programming practice, color images, and illustrative movies. Comprehensive and up-to-date, this book includes essential topics that either reflect practical significance or are of theoretical importance. Topics are discussed in substantial and increasing depth. Application surveys describe numerous important application areas such as image based rendering and digital libraries. Many important algorithms broken down and illustrated in pseudo code. Appropriate for use by engineers as a comprehensive reference to the computer vision enterprise.
3,627 citations
TL;DR: Strong acids and bases seem to be the best desorbing agents to produce arsenic concentrates, and some commercial adsorbents which include resins, gels, silica, treated silica tested for arsenic removal come out to be superior.
3,168 citations
TL;DR: In this article, an improved version of the global evapotranspiration (ET) algorithm based on MODIS and global meteorology data has been proposed, which simplifies the calculation of vegetation cover fraction, calculating ET as the sum of daytime and nighttime components, adding soil heat flux calculation, improving estimates of stomatal conductance, aerodynamic resistance and boundary layer resistance, separating dry canopy surface from the wet and dividing soil surface into saturated wet surface and moist surface.
2,052 citations
Proceedings Article•
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TL;DR: A scheme is developed for classifying the types of motion perceived by a humanlike robot and equations, theorems, concepts, clues, etc., relating the objects, their positions, and their motion to their images on the focal plane are presented.
Abstract: A scheme is developed for classifying the types of motion perceived by a humanlike robot. It is assumed that the robot receives visual images of the scene using a perspective system model. Equations, theorems, concepts, clues, etc., relating the objects, their positions, and their motion to their images on the focal plane are presented. >
2,000 citations