This paper determines optimal public debt in a life cycle model with incomplete markets that matches the empirically observed variation consumption, labor, and savings. We find savings—not debt—equal to 168 percent of output is optimal, primarily due influence on household decision-making. By inducing lower interest rate, savings slow consumption leisure growth over an average household’s lifet...

Full-waveform inversion (FWI) is today a standard process for the inverse problem of seismic imaging. PDE-constrained optimization used to determine unknown parameters in wave equation that represent geophysical properties. The objective function measures misfit between observed data and calculated synthetic data, it has traditionally been least-squares norm. In sequence papers, we introduced W...

The purpose of this research is to investigate on the influences of cutting parameters on machine tool vibration & surface finish using MEMS Accelerometer in high precision CNC milling machine. The cutting parameters considered are depth of cut, feed rate and spindle speed. In this work, efforts has been made to acquire vibration data on spindle housing using MEMS Accelerometer, measure surface...

Eldana saccharina Walker (Lepidoptera: Pyralidae) has caused high yield losses in KwaZulu-Natal sugarcane. Early cutting is one of a number of methods being used to reduce losses due to E. saccharina infestations. A cohort based age-structured mathematical model was developed to enable sugarcane growers to simulate the effect of various seasonal conditions on E. saccharina infestation levels. T...

this paper investigates an epq model with the increasing demand and demand dependent production rate involving the trade credit financing policy, which is seldom reported in the literatures. the model considers the manufacturer was offered by the supplier a delayed payment time. it is assumed that the demand is a linear increasing function of the time and the production rate is proportional to ...

The aim of this study, is to use finite element simulation to achieve the optimal geometry of a broaching tool that creates the lowest tensile stress at the machined surface of the Ti6Al4V alloy. It plays a major role in reducing production costs and improves the surface integrity of the machined parts. The type and amount of residual stress determined by the thermal and mechanical loads transm...