Recent photometric observations of massive stars show ubiquitous low-frequency "red-noise" variability, which has been interpreted as internal gravity waves (IGWs). Simulations IGWs generated by convection smooth surface wave spectra, qualitatively matching the observed red-noise. On other hand, theoretical calculations Shiode et al (2013) and Lecoanet (2019) predict should manifest at regularl...

a r t i c l e i n f o This paper expands an inventory model for deteriorating items with stock-dependent demand. This model provides time varying backlogging rate as well as time varying deterioration rate. The aim of this model is to determine the optimal cycle length of each product such that the expected total cost (holding, shortage, ordering, deterioration and opportunity cost) is minimize...

In a real manufacturing system, a machine may need multiple maintenance activities to improve its production efficiency due to the effects of aging or deteriorating. This paper considers scheduling with aging or deteriorating effects and deteriorating maintenance activities simultaneously on a single machine. We assume that the machine may be subject to several maintenance activities during the...

Theoretically, given a choice over two risky assets with equivalent expected returns, a risk averse expected utility maximizer should choose the second-order stochastically dominant asset. We develop a theoretical framework that allows for decision error, which should decrease in risk aversion. We conduct an experiment using a risk preference elicitation mechanism to identify risk averse indivi...

Let Q be the Q-matrixof an irreducible, positive recurrent Markov process on a countable state space. We show that, under a number of conditions, the stationary distributions of the n × n north-west corner augmentations of Q converge in total variation to the stationary distribution of the process. Twoconditions guaranteeing such convergence include exponential ergodicity and stochastic monoton...