On solving discrete optimization problems with one random element under general regret functions

In this paper we consider the class of stochastic discrete optimization problems in which the feasibility of a solution does not depend on the particular values the random elements in the problem take. Given a regret function, we introduce the concept of the risk associated with a solution, and define an optimal solution as one having the least possible risk. We show that for discrete optimization problems with one random element and with min-sum objective functions a least risk solution for the stochastic problem can be obtained by solving a non-stochastic counterpart where the latter is constructed by replacing the random element of the former with a suitable parameter. We show that the above surrogate is the mean if the stochastic problem has only one symmetrically distributed random element. We obtain bounds for this parameter for certain classes of asymmetric distributions and study the limiting behavior of this parameter in details under two asymptotic frameworks. \u

On solving discrete optimization problems with multiple random elements under general regret functions

In this paper we attempt to find least risk solutions for stochastic discrete optimization problems (SDOP) with multiple random elements, where the feasibility of a solution does not depend on the particular values the random elements in the problem take. While the optimal solution, for a linear regret function, can be obtained by solving an auxiliary (non-stochastic) discrete optimization problem (DOP), the situation is complex under general regret. We characterize a finite number of solutions which will include the optimal solution. We establish through various examples that the results from Ghosh, Mandal and Das (2005) can be extended only partially for SDOPs with additional characteristics. We present a result where in selected cases, a complex SDOP may be decomposed into simpler ones facilitating the job of finding an optimal solution to the complex problem. We also propose numerical local search algorithms for obtaining an optimal solution. \u

P. K. Das to My dear brother (13 October 1962)

https://egrove.olemiss.edu/mercorr_pro/2152/thumbnail.jp

Cage culture in reservoirs in India (a handbook)

This document is part of a series of 5 technical manuals produced by the Challenge Program Project CP34 “Improved fisheries productivity and management in tropical reservoirs”. The reservoirs of India have a combined surface area of 3.25 million hectares (ha), mostly in the tropical zone, which makes them the country¡¯s most important inland water resource, with huge untapped potential. The prime objective of cage culture discussed here is to rear fingerlings measuring >100 millimetres (mm) in length, especially carp, for stocking reservoirs. The manual discusses various aspects of cage culture from site selection to its economic benefits. (PDF contains 27 pages

Dynamic Interconnection Techniques for Parallel Communication

Parallel computing has contributed significantly to Defence applications. This field has helped in the development of dedicated hardware/software for ballistic missile defence system. In parallel computers, interprocessors communication mechanism strongly influences overall performance of the system. If a parallel computer is composed of n processors and each processor has a performance p, then the maximum potential of the system is np. The present review concentrates on interprocessor communication. Crossbar and delta network is discussed in detail. Cogent XTM - a better solution over crossbar network is also discussed

Epidemiological and entomological aspects of malaria in forestfringed villages of Sonitpur district, Assam

Background & objectives : Detailed epidemiological and entomological studies were undertaken inforest-fringed villages and a Tea Estate in Sonitpur, Assam to assess the malaria situation.Methods : Door-to-door active surveillance was carried out to collect blood samples. Thick and thinblood smears stained with Giemsa were used for malaria parasite detection. Mosquito collectionswere made using CDC miniature light-traps and hand catch methods from dusk-to-dawn.Results : 48% SPR, 49.1 Pf % was recorded from the study villages. Children between 10 and 14 yearswere most sufferers. Per trap night density of mosquitoes in human dwellings was 204.3 and incattlesheds — 908.7, An. minimus accounted for 20.7% of total malaria vectors.Interpretation & conclusion : The results showed high malaria risk in the study villages. High vectordensity with high parity rate, poor socio-economic conditions, lack of awareness, poor sanitation andcongenial atmosphere for mosquito proliferation are aggravating the malaria situation more complex inthe study area

Cage culture in reservoirs in India (a handbook)

This document is part of a series of 5 technical manuals produced by the Challenge Program Project CP34 ôImproved fisheries productivity and management in tropical reservoirsö. The reservoirs of India have a combined surface area of 3.25 million hectares (ha), mostly in the tropical zone, which makes them the countryí»s most important inland water resource, with huge untapped potential. The prime objective of cage culture discussed here is to rear fingerlings measuring >100 millimetres (mm) in length, especially carp, for stocking reservoirs. The manual discusses various aspects of cage culture from site selection to its economic benefits.

Enhancing fishery productivity in small reservoir in India: technical manual

This document is part of a series of 5 technical manuals produced by the Challenge Program Project CP34 ôImproved fisheries productivity and management in tropical reservoirsö. Inland capture fisheries in India have declined in recent years, leaving thousands of fishers to sink deeper into poverty. Freshwater aquaculture in small water bodies like ponds now contributes 80% of the countryí»s inland fish production. This manual outlines the use of small reservoir for freshwater aquacultureas a means of providing rural areas with food and livelihoods and protecting aquatic ecosystems, in particular by facilitating the conservation of indigenous fish species.