A study of inflation effects on an EOQ model for Weibull deteriorating/ameliorating items with ramp type of demand and shortages

This paper deals with the effects of inflation and time discounting on an inventory model with general ramp type demand rate, time dependent (Weibull) deterioration rate and partial backlogging of unsatisfied demand. The model is studied under the replenishment policy, starting with shortages under two different types of backlogging rates, and their comparative study is also provided. We then use the computer software, MATLto find the optimal replenishment policies. Duration of positive inventory level is taken as the decision variable to minimize the total cost of the proposed system. Numerical examples are then taken to illustrate the solution procedure. Finally, sensitivity of the optimal solution to changes of the values of different system parameters is also studied

An EMQ inventory model for defective products involving rework and sales team's initiatives-dependent demand

This paper investigates the issue of an economic manufacturing quantity model for defective products involving imperfect production processes and rework. We consider that the demand is sensitive to promotional efforts/sales teams' initiatives as well as the setup cost can be reduced through further investment. It also assumes that fixed quantity multiple installments of the finished batch are delivered to customers at a fixed interval of time. The long-run average cost function is derived and its convexity is proved via differential calculus. An effective iterative solution procedure is developed to achieve optimal replenishment lot-size, setup cost and the initiatives of sales teams so that the total cost of system is minimized. Numerical and sensitivity analyses are performed to evaluate the outcome of the proposed solution procedure presented in this research

An Inventory Model with Three Rates of Production Rate under Stock and Time Dependent Demand for Time Varying Deterioration Rate with Shortages

An inventory model with three different rates of production rate and stock dependent demand is considered. Deterioration plays a vital role in present environment of market. In this paper, a two parameter Weibull distribution has been used to represent the deterioration rate. The objective is to determine the optimal total cost and the optimal time schedule of the plan for the proposed model. Some numerical examples have been carried out to illustrate the developed model

Study of hardness and tensile strength of Aluminium-7075 percentage varying reinforced with graphite and bagasse-ash composites

AbstractWaste sugarcane bagasse-ash and graphite utilizing as reinforcement in fabricating of an aluminium alloy (Al-7075) based matrix hybrid composites. The aluminium matrix hybrid composites have been fabricated by stir-casting method at 750 °C. Casting was developed in circular metal mould having 5 circular slots of diameter of 21 mm and length of 250 mm. Adding bagasse-ash with varying reinforcement of three cases, in first case 2% constant with varying graphite 1%, 3%, and 5%, in second case 4%, and in third case 6% constant with varying same graphite percentage. The effect of the reinforcement has been performed through various mechanical tests. The mechanical properties measuring such as Brinell hardness and tensile strength of both the samples have been prepared as per the ASTM E23 and E8 standards. Results give out that there will be greater effect of reinforcing different bagasse-ash in aluminium alloy matrix hybrid composites. In the third case more enhanced mechanical properties have been achieved as compared to case one and two of bagasse–ash combination. It shows that the selection of bagasse-ash as reinforcement has one of the most significant criteria for the fabrication of aluminium matrix hybrid composites

The Effect of High-Fat Diet and Exercise on Non-Alcoholic Fatty Liver Disease and Glycemic Control

This study investigates the effects of chronic high-fat diet (HFD) and endurance training on Non-Alcoholic Fatty Liver Disease (NAFLD) and glycemic control. Here we report that chronic HFD promotes hepatic steatosis to an extent, which impairs whole body glucose metabolism. Moreover, we illustrate the effectiveness of exercise in attenuating HFD-induced NAFLD. In addition to NAFLD treatment, exercise improves whole body glycemic control and insulin sensitivity. Measures of gluconeogenic markers indicate a reduction in gluconeogenesis (GNG) to be partially attributable to the improved glucose regulation. Importantly, we present the novel finding that chronic endurance exercise reduces the rate of hepatic glycogen synthesis despite improvements in glycemia. Thus, it appears glucose has alternate metabolic fates in the body which forces mobilization rather than storage of glucose in a trained system. Taken together, it appears exercise is an effective therapeutic tool, which can significantly improve the deleterious effects of chronic HF-feeding

Case Report: A difficult diagnosis to swallow

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