Choudhary D.,Government of Rajasthan |
Shankar R.,Indian Institute of Technology Delhi
Computers and Industrial Engineering | Year: 2011
Integer linear programming approach has been used to solve a multi-period procurement lot-sizing problem for a single product that is procured from a single supplier considering rejections and late deliveries under all-unit quantity discount environment. The intent of proposed model is two fold. First, we aim to establish tradeoffs among cost objectives and determine appropriate lot-size and its timing to minimize total cost over the decision horizon considering quantity discount, economies of scale in transactions and inventory management. Second, the optimization model has been used to analyze the effect of variations in problem parameters such as rejection rate, demand, storage capacity and inventory holding cost for a multi-period procurement lot-sizing problem. This analysis helps the decision maker to figure out opportunities to significantly reduce cost. An illustration is included to demonstrate the effectiveness of the proposed model. The proposed approach provides flexibility to decision maker in multi-period procurement lot-sizing decisions through tradeoff curves and sensitivity analysis. © 2011 Elsevier Ltd. All rights reserved.
Choubisa S.L.,Government of Rajasthan
Environmental Monitoring and Assessment | Year: 2014
Relative susceptibility to fluoride (F) toxicosis in the form of osteo-dental fluorosis was observed in an observational survey of 2,747 mature and 887 immature domestic animals of diverse species living in areas with naturally fluoridated (>1.5 ppm F) drinking water. These animals included buffaloes (Bubalus bubalis), cattle (Bos taurus), camels (Camelus dromedarius), donkeys (Equus asinus), horses (Equus caballus), goats (Capra hircus), and sheep (Ovis aries). Of these mature and immature animals, 899 (32.7 %) and 322 (36.3 %) showed evidence of dental fluorosis with varying grades, respectively. Their incisor teeth were stained with light to deep brownish color. On clinical examination, 31.2 % mature and 10.7 % immature animals revealed periosteal exostoses, intermittent lameness, and stiffness of tendons in the legs as signs of skeletal fluorosis. The maximum susceptibility to fluoride toxicosis was found in bovines (buffaloes and cattle) followed by equines (donkeys and horses), flocks (goats and sheep), and camelids (camels). The bovine calves were found to be more sensitive and highly susceptible to F toxicosis and revealed the maximum prevalence (92.2 %) of dental fluorosis. This indicates that bovine calves are less tolerant and give early sign of F poisoning (dental fluorosis) and therefore, they can be considered as bio-indicators for fluoridated water as well as for endemicity of osteo-dental fluorosis. Causes for variation in susceptibility to F toxicosis (fluorosis) in various species of domestic animal are also discussed. © 2014 Springer International Publishing.
Suthar S.,Government of Rajasthan
Ecological Engineering | Year: 2010
This study compiles the impact of vermiwash on seed germination, seedling growth and biochemistry of Cyamopsis tertagonoloba and Trigonella foenum-graecum under lab conditions. A total of four experimental solutions, i.e. 100% vermiwash, 50% vermiwash, 5% urea solution and distilled water, were used in this study. The maximum germination was in 50% vermiwash, while plant growth parameters (root length, shoot length, shoot/root ratio and leaves/plant) showed the optimum results in 100% vermiwash trial. The highest level of chlorophyll in fresh leaves was in 100% vermiwash treatment. The seedlings with 100% vermiwash foliar spray showed the maximum level of total protein, total soluble sugars and starch (p < 0.05) in their tissues. Thus, results clearly suggested that vermiwash may be an ecologically safe and cost-effective alternative of synthetic plant growth promoters for sustainable farming practices. © 2010 Elsevier B.V. All rights reserved.
Choubisa S.L.,Government of Rajasthan
Proceedings of the National Academy of Sciences India Section B - Biological Sciences | Year: 2013
Chronic fluorotoxicosis in the form of dental and skeletal fluorosis was observed in 443 immature and 2,155 mature domestic animals inhabiting tribal rural areas of southern Rajasthan, India. Their drinking water contained fluoride in the range between 3.1 and 6.1 ppm. These animals included cattle (Bos taurus), buffaloes (Bubalus bubalis), horse (Equus caballus), donkeys (Equus asinus), dromedary camels (Camelus dromedarius), sheep (Ovis aries) and goats (Capra hircus). Of these immature and mature animals 172 (38.8 %) and 826 (38.3 %) showed evidence of dental fluorosis with varying grades, respectively. Their incisor teeth were bilaterally and vertically or horizontally brown to deep yellowish in colour. Also present, as indication of more severe dental fluorosis, were irregular wearing and excessive abrasions of teeth, deep yellowish discoloration of exposed cementum and/or remaining enamel surface and pronounced loss of teeth supporting bone with recession of gingiva. On clinical examination 12.1 % immature and 28.4 % mature animals revealed periosteal exostoses in mandibular regions, ribs, metacarpus and metatarsus, intermittent lameness, hoop deformities and stiffness of tendons in the legs as signs of severe skeletal fluorosis. In the fluorosed animals other signs of chronic fluoride intoxication as colic, intermittent diarrhoea, excessive urination, irregular reproductive cycles, repeated abortions, sterility and still birth were seen. No significant variation in prevalence of dental fluorosis was found between mature and immature animals. However, mature animals showed relatively higher (28.4 %) prevalence of skeletal fluorosis as compared to their counterparts (12.1 %). Among these animal species, buffaloes revealed the maximum prevalence of dental (96.8 %) and skeletal (66.9 %) fluorosis and minimum of 17.02 and 8.7 %, respectively, was observed in goats. However, prevalence and severity of osteo-dental fluorosis greatly varied from species to species and between grass-eaters or grazers (cattle, buffaloes and equines) and plant-eaters or browsers (camels and flocks). Causes for variation in prevalence and severity of fluoride toxicity in different species and between animals of different feeding habits are discussed. © 2012 The National Academy of Sciences, India.
Gidwani L.,Government of Rajasthan |
Tiwari H.,Malaviya National Institute of Technology, Jaipur |
Bansal R.C.,Queensland University of Technology
International Journal of Electrical Power and Energy Systems | Year: 2013
The increasing interest to utilize wind energy as a power source prompted more researches to be dedicated to the unconventional integration of this power source into the current grid. In this paper, one avenue to achieve this efficient utilization, through the use of integrated wind energy conversion system (WECS) using doubly fed induction generator (DFIG) is presented. Wind grid integration brings the problems of voltage fluctuation and harmonic distortion. This paper presents an Unconventional Power Electronic Interface (UPEI) to reduce the total harmonic distortion (THD) and enhance power quality during disturbances. The models used in the paper includes a pitch-angled controlled wind turbine model, a DFIG model, power system model and an UPEI having controlled converters. A phase to phase fault is simulated on 132 kV bus and the measured results obtained from grid connection of the wind generation system are presented. The results have demonstrated the ability of UPEI to regulate pitch angle, VAR and to reduce THD. The proposed system increases the effectiveness of the utilization of wind energy. © 2012 Elsevier Ltd. All rights reserved.