This paper deals with multi-component machine repair model having provision of warm standby units and repair facility consisting of two heterogeneous servers (primary and secondary) to provide repair to the failed units. The failure of operating and standby units may occur individually or due to some common cause. The primary server may fail partially following full failure whereas secondary se...

The present investigation deals with a machine repair problem consisting of cold and warm standby machines. The machines are subject to breakdown and are repaired by the permanent repairman operating under N-policy. There is provision of one additional removable repairman who is called upon when the work load of failed machines crosses a certain threshold level and is removed as soon as the wor...

A new parameter is introduced for modeling the reliability of systems with standby spares. Dependability, d, is defined as the conditional probability that the checker reports a module as good given that the module is good. The trade-off between the number of spares and dependability then is examined.

In a multi-location, exchangeable-item repair system with spares, the expected waiting time and the fill rate measures are oftentimes used as the optimization criteria for the spares allocation problem. These measures, however, do not take into account that customers will tolerate a reasonable delay and therefore, the firm does not incur reputation costs if customers wait less than their tolera...

The logistics resources (in the form of spare parts) for future exploration missions to the Moon and Mars can have significant mass and volume requirements. In this study it is shown that reconfigurable or common parts, that allow use of the same component in different mission elements, can be a means of reducing the required number of spares. A model for determining the system availability as ...

Models based on the crystal structure of interleukin-1 vary significantly. D eP ri st o/ El se vi er UK) warns that, for any given structure in the Protein Data Bank (PDB), there will be many other overlooked structures that are equally consistent with the data. Crystallized proteins retain the ability to move around, thus making interpretations of diffraction data an imprecise process. Crystal...

RRAM (Redundant Random Access Memory) is a RAM with redundant spares included in the chip. Because of the row/column organization of memory cells in RAMs, these spares are organized as rows and columns. Memory cells which are faulty can be repaired by the spare rows, spare columns and their combinations. Because additional cost of incorporating spares and repairing, it is usually advantageous t...

This note consider a convention conversion target and Since the length of th concurrent pressure p Abstract: The NLC m replacement of failed feedback. A more ca with less BNS overhe consequence the total Linear Collider Collaboration Tech Notes The NLC m replacement of failed feedback. A more ca with less BNS overhe consequence the total Linear Collider Collaboration Tech Notes to on in the ial...