A. Das Gupta

Learn More
A study was undertaken to determine the predictive capability of Annualized Agricultural NonPoint Source (AnnAGNPS) model with respect to runoff volume, peak flows, and sediment yield from a 130.8 ha watershed in the Siwalik Hills of Nepal. AnnAGNPS simulations are compared with two years of field observations from the study watershed. The model predicted(More)
This paper describes the role of the Gadaa system, a uniquely democratic political and social institution of the Oromo people in Ethiopia, in the utilization of important resources such as water, as well as its contribution in conflict resolution among individuals and communities. It discusses ways to overcome the difference between customary and statutory(More)
Advances in the traditional method of subsurface porous clay pipe irrigation rely on knowledge of the distribution of water in the soil. Knowing the relationships among the hydraulic and physical parameters in the system is important for both the design and management of the system. To simulate the infiltration from the porous clay pipe and predict the(More)
Determination of gene expression is essential for understanding the role of a given gene in normal cell growth or disease processes. Recently, newly described microRNAs have been shown to play a key role in the regulation of gene expression; in particular, deregulation of microRNAs is often associated with a variety of human disorders including cancer.(More)
We present an innovative approach to explore water management options in irrigated agriculture considering the constraints of water availability and the heterogeneity of irrigation system properties. The method is two-folds: (i) system characterization using a stochastic data assimilation procedure where the irrigation system properties and operational(More)
The purpose of this study was to develop single walled carbon nanotubes (SWCNT) and poly lactic-co-glycolic acid (PLAGA) composites for orthopedic applications and to evaluate the interaction of human stem cells (hBMSCs) and osteoblasts (MC3T3-E1 cells) via cell growth, proliferation, gene expression, extracellular matrix production and mineralization.(More)
The purpose of this study was to develop three-dimensional single-walled carbon nanotube composites (SWCNT/PLAGA) using 10-mg single-walled carbon nanotubes (SWCNT) for bone regeneration and to determine the mechanical strength of the composites, and to evaluate the interaction of MC3T3-E1 cells via cell adhesion, growth, survival, proliferation, and gene(More)
Bone graft substitutes are widely used in the field of orthopedics and are extensively used to promote vertebral fusion. Fusion is the most common technique in spine surgery and is used to treat morbidities and relieve discomfort. Allograft and autograft bone substitutes are currently the most commonly used bone grafts to promote fusion. These approaches(More)
Laboratory and numerical experiments were carried out to analyze the effect of soil texture on the emission characteristics of porous clay pipe used for subsurface irrigation. Results show that the emission rate of the pipe is linearly related to the applied hydraulic head in the open environment. With the pipe embedded in the soil, the emission rate(More)
Injury to the ACL is a commonly encountered problem in active individuals. Even partial tears of this intra-articular knee ligament lead to biomechanical deficiencies that impair function and stability. Current options for the treatment of partial ACL tears range from nonoperative, conservative management to multiple surgical options, such as: thermal(More)