Irrigation and drainage in the new millennium

Presented at the 2000 USCID international conference, Challenges facing irrigation and drainage in the new millennium on June 20-24 in Fort Collins, Colorado.Includes bibliographical references.A hydrodynamic model for simulating the flow in Basin irrigation system is presented. An explicit McCormack method is used for solving the governing equations. This method doesn't require any special treatment of advancing or receding fronts such as sub-grid technique. The numerical procedure accommodates for three inflow boundary conditions namely line inflow, corner inflow and fan inflow. The results are compared with observed advance and recession times for two level basin irrigation events available in the literature and two field experiments conducted by authors at WALMI, Vadod, Anand, Gujarat, India. A very good comparison of results is observed. The results for various other cases are also presented

Impact of Country-of-origin Image on Brand Equity: A Study on Durable Products in India

AbstractCountry of origin is an important cue to influence consumers’ perception of a brand as reported and documented by the literature. This paper tries to identify the effects of brand's country-of-origin image on the formation of its brand equity. To satisfy the objective the brand equity of some durable brands in India was examined. Three contributory dimensions of brand equity i.e. brand awareness; brand loyalty and brand distinctiveness were refereed. Random probability sampling was incorporated to collect the data from the respondents. Multiple regression analysis was conducted on brand equity dimensions which show that brand's country-of-origin image positively and significantly influences dimensions of brand equity. Again the brand's country-of-origin image influences brand equity, either directly or indirectly, through the mediating effects of the three dimensions. The study further suggests that marketers should put give more emphasis in developing brand awareness for their products and the superior image of brand's own country should be properly promoted so that the brand image will be enhanced

Constraint Based Hybrid Approach to Parsing Indian Languages

PACLIC 23 / City University of Hong Kong / 3-5 December 200

Energy Efficiency and Throughput for TCP Traffic in Multi-Hop Wireless Networks

Ahwrrrcr — We study the performance metrics associated with TCPregulated traffic in multi-hop, wireless networks that use a cnmmnn physical channel (e.g., IEEE 802.11). In contrast to earlier analyses, we focus simultaneously on two key operating metrics- the energy efficiency and the session throughput. Using analysis and simulations, we show how these metrics are strongly influenced hy the radio transmission range of individual nodes. Due to tradeoffs hetween the individual packet transmission energy and the likelihood of retransmissinns, the total energy consumption is a cnnvex function of the numher of hops (and hence, of the transmission range). On the other hand, the TCP session throughput decreases supralinearly with a decrease in the transmission range. In certain scenarios, the overall network capacity can then he a cnncave function of the transmission range. Based on our analysis of the performance of an individual TCP session, we finally study how parameters such as the node density and the radio transmission range affect the overall network capacity under different operating conditions. Our analysis shows that capacity metrics at the TCP layer hehave quite differently than corresponding idealized link-layer metrics. 1

The Capacity of Multi-Hop Wireless Networks with TCP Regulated Traffic

We study the capacity of multi-hop wireless networks with TCP regulated traffic. We study the dependence of the capacity on the transmission range of nodes in the network. Specifically, we examine the sensitivity of the capacity to the speed of the nodes and the number of TCP connections in an ad hoc network. By incorporating the notion of a minimal acceptable QoS metric (loss) for an individual session, we argue that the QoS-aware capacity is a more accurate model of the TCP-centric capacity of an ad-hoc network. We study the dependence of capacity on the source application (Telnet or FTP) and on the choice of the ad-hoc routing protocol (AODV, DSR or DSDV). We conclude that persistent and non-persistent traffic behave quite differently in an ad-hoc network