Lambda Iteration and Genetic Algorithms Application to solve the Economic Load Dispatch Problem of Seven Nigerian Thermal Power Plants

Economic load dispatch (ELD) is a method of earmarking the required load demand between the existing generations in power system and principally determining allocation of generators to each generation for various systems load levels. ELD is an essential component in power system planning and operation. ELD solutions are found by solving the conventional load flow equations, while at the same time ensuring that fuel costs are minimized. There are many methods developed for solving ELD problems, but this work is restricted to two, which are the Lambda Iteration Method (LIM) and the Genetic Algorithm (GA) modified with sorting algorithm. The main objective is to apply the two methods to solve ELD problems in power system networks by comparing the performance of GA method with that of LIM in terms of fuel cost efficiency. The usefulness of LIM and GA to solving economic dispatch problem is emphasized. Simulation results obtained on this network using GA and LIM verify their effectiveness in solving ELD problems. Lastly, GA and LIM approaches have been effectively applied to the harmonization of the Nigerian 32-bus system powered by seven thermal and three hydro generating units. The study shows that GA exhibits better results than LIM from both best possible generation allocations. The results obtained demonstrate that GA based method gave better solution in terms of fuel cost reduction, when compared with those obtained using LIM. By blending the probabilities of crossover and mutation, and the application of sorting techniques, computer usage time can be significantly reduced in the system with better fuel cost reduction. Keywords: Economic load dispatch (ELD), genetic algorithm (GA), lambda iteration method (LIM), optimization, sorting algorithm. DOI: 10.7176/JETP/11-4-04 Publication date: August  31st 202

Examination of the role of Mycoplasma bovis in bovine pneumonia and a mathematical model for its evaluation

The authors screened 34 large cattle herds for the presence of Mycoplasma bovis infection by examining slaughtered cattle for macroscopic lung lesions, by culturing M. bovis from lung lesions and at the same time by testing sera for the presence of antibodies against M. bovis. Among the 595 cattle examined, 33.9% had pneumonic lesions, mycoplasmas were isolated from 59.9% of pneumonic lung samples, and 10.9% of sera from those animals contained antibodies to M.bovis. In 25.2% of the cases M. bovis was isolated from lungs with no macroscopic lesions. The proportion of seropositive herds was 64.7%. The average seropositivity rate of individuals was 11.3% but in certain herds it exceeded 50%. A probability model was developed for examining the relationship among the occurrence of pneumonia, the isolation of M. bovis from the lungs and the presence of M. bovis specific antibodies in sera

Consequences of childhood burn: Findings from the largest community-based injury survey in Bangladesh

In terms of morbidity and disability, burn is a major public health problem throughout the world, especially in low-income countries. It causes long-term disability and remains as a health, social and economic burden. A population-based survey was conducted in Bangladesh between January and December 2003. Nationally representative data were collected from 171,366 rural and urban households comprising of a total 819,429 population, which included 351,651 children under 18 years of age. Mothers/head of households were interviewed with a structured instrument. The objective of this paper is to determine the consequences of childhood burn at social and economic levels in Bangladesh. In the survey, 1013 children were found with different degrees of burn in the preceding 1 year. Among them 20 children were permanently disabled. The rate of permanent disability was found to be 5.7 per 100,000. The average loss of school days was found to be about 21 days. More than two-thirds of the burn victims required assistance in their daily activities for different durations of time. More than 7% of the children required hospitalisation for their burns. The rate of hospitalisation was 21.9 per 100,000; the average duration of hospital stay was 13.4 days. The highest duration (40 days) of hospital stay was found among girls 10– 14 years old. The highest expenditure for the treatment was also found in this age group. The average direct expenditure incurred by a family for treatment of severe burn was determined to be $462. In this study it was found that more than 61$50 a month. Burn is a devastating injury among all childhood injuries with significant additional economic consequences beyond the medical, pain, and suffering issues. Developing a national prevention program should be an immediate public health priority

Human rabies postexposure prophylaxis during a raccoon rabies epizootic in New York, 1993 and 1994.

We describe the epidemiology of human rabies postexposure prophylaxis (PEP) in four upstate New York counties during the 1st and 2nd year of a raccoon rabies epizootic. We obtained data from records of 1,173 persons whose rabies PEP was reported to local health departments in 1993 and 1994. Mean annual PEP incidence rates were highest in rural counties, in summer, and in patients 10 to 14 and 35 to 44 years of age. PEP given after bites was primarily associated with unvaccinated dogs and cats, but most (70%) was not attributable to bites. Although pet vaccination and stray animal control, which target direct exposure, remain the cornerstones of human rabies prevention, the risk for rabies by the nonbite route (e. g., raccoon saliva on pet dogs' and cats' fur) should also be considered

Tactics and Economics of Wildlife Oral Rabies Vaccination, Canada and the United States

Economic assessments and modeling studies suggest that these programs yield cost savings and public health benefits

Human Rights Advocates Program 30th Anniversary Report

This handbook was created to share the experiences of alumni of the Human Rights Advocates Program at the Institute for the Study of Human Rights, Columbia University, with aspiring human rights advocates around the globe

Potential cost savings with terrestrial rabies control

BACKGROUND: The cost-benefit of raccoon rabies control strategies such as oral rabies vaccination (ORV) are under evaluation. As an initial quantification of the potential cost savings for a control program, the collection of selected rabies cost data was pilot tested for five counties in New York State (NYS) in a three-year period. METHODS: Rabies costs reported to NYS from the study counties were computerized and linked to a human rabies exposure database. Consolidated costs by county and year were averaged and compared. RESULTS: Reported rabies-associated costs for all rabies variants totalled $2.1 million, for human rabies postexposure prophylaxes (PEP) (90.9$784,529). Average costs associated with the raccoon variant varied across counties from $440 to$1,885 per PEP, $14 to$44 per specimen, and $0.33 to$15 per pet vaccinated. CONCLUSION: Rabies costs vary widely by county in New York State, and were associated with human population size and methods used by counties to estimate costs. Rabies cost variability must be considered in developing estimates of possible ORV-related cost savings. Costs of PEPs and specimen preparation/shipments, as well as the costs of pet vaccination provided by this study may be valuable for development of more realistic scenarios in economic modelling of ORV costs versus benefits

Community development and its impact on health: South Asian experience

Most South Asian governments have concentrated on emulating a Western style of healthcare service, with the result that an elite few are overmedicalised whereas the majority are neglected. However, community participation in the development of local health services could provide a solutio