one of the main factors affecting on the technical and economic performance of farms and livestock is the ability or capacity management. main goal of farm management is achieving specific performance, profitability and productivity; there for measurement management and performance in livestock farms are necessary. considering the necessity of increasing production and quality in the dairy indu...

decreasing water resources has made optimum water allocation in agriculture essential. planning optimum irrigation and crop production function considering accessible water and growing stage is an efficient approach to increase water productivity. studies have applied this approach to maximize crop production using the fao crop production method introduced in 1979. however, the fao introduced a...

abstract. when a production facility is designed, there are various parameters affecting the number machines such as production capacity and reliability. it is often a tedious task to optimize different objectives simultaneously. the other issue is the uncertainty in many design parameters which makes it difficult to reach a desirable solution. in this paper, we present a new mathematical model...

The availability of pre-existing PHC structures was a key indicator that most countries have the fundamental and operational basis for CHN. Nevertheless, significant deficiencies undercut CHNs' contributions to enhancing in these nations. According report, policymakers' general lack commitment their limited ability use CHN-related global regional policy tools at disposal are leading causes gaps.

emphasis on milk yield (my) as well as milk yield persistency (myp) and calving interval (ci) is necessary to achieve more sustainable productionin dairy cattle. therefore the main objective of this study was to find an optimum regression model to estimate economic values for my, myp and ci.using a deterministic bio-economic model, seventyfiveproduction states differing mainly in my, mypand ciw...

Background and purpose:Consumption of baking soda, as a primary material for preparation of bread dough, has been banned due to its health complications in Iran. So bread production in our country faced difficulties and one part of them is related to health issues which are bread production. Also, in some cases, baking soda is used in the bread production. This study was done to study the envir...

An economic production quantity model with demand dependent unit production cost in fuzzy environment has been developed. Flexibility and reliability consideration are introduced in the production process. The models are developed under fuzzy goal and fuzzy restrictions on budgetary cost. The inventory related costs and other parameters are taken as fuzzy in nature. The problem is solved by par...

abstract diabetes mellitus (dm) is one of the greatest public health threats in modern societies. although during a few years it was suggested that dm had no significant effect in male reproductive function, this view has been challenged in recent years. from a clinical perspective, the evaluation of semen parameters, as well as spermatozoa deoxyribonucleic acid (dna) integrity, are often studi...

The authors consider in this paper an integrated forecasting production system of the tracking type. The demand rate during a certain period depends on the demand rate of the previous period. Also, the demand rate depends on the inventory level. Items on the shelves are subject to deterioration. Using a model predictive control approach, the authors obtain the optimal production rate, the optim...