In the last 20 years, modern wide-field surveys discovered a new class of peculiar transients, which lie in luminosity gap between standard supernovae and classical novae. These transients are often called “intermediate optical transients” or “gap transients”. They usually distinguished subgroups based on their phenomenology, such as supernova impostors, intermediate red luminous this review, w...

In this paper, we consider demand management decisions for an assemble-to-order production system in which both the availability of intermediate material and assembly capacity are limited. For each incoming order, the manufacturer must decide whether to accept it and what due date to quote for an accepted order. The actual assembly dates are still subject to change after these decisions, and a ...

This paper considers a bi-objective model for a scheduling problem of unrelated parallel batch processing machines to minimize the makespan and maximum tardiness, simultaneously. Each job has a specific size and the data corresponding to its ready time, due date and processing time-dependent machine are uncertain and determined by trapezoidal fuzzy numbers. Each machine has a specific capacity,...

1 The British Thoracic Society. Intermediate care – hospital-athome in chronic obstructive pulmonary disease. British Thoracic Society guidelines. Thorax 2007; 62: 200–210. 2 British Lung Foundation. Invisible lives – Chronic Obstructive Pulmonary Disease (COPD) – finding the missing millions. www.lunguk.org Date last updated: November 2007. Date last accessed: April 2008. 3 Global Initiative f...

abstract date palm, phoenix dactylifera, is one of the most important horticultural crops in iran. the most soils in iran, especially those cultivated with palm, are calcareous with high ph. the high ph of soil causes reduction of nutrient elements absorption. findings of researches show that application of elemental sulfur along with tiobacillus bacteria in soil, due to sulfur oxidation, reduc...

The tendency to consume food with lower sugar content and alternatively healthy foods and food products are rising. High levels of sugar in date syrup might be used as a good alternative to sugar in various food products. Iran is one of the main producers of date fruit and it is possible to produce foods with high nutritional values from date to replace high-sugar content food....

Wafer fabrication is a capital-intensive and highly complex manufacturing process. In the wafer fabrication facility (fab), wafers are grouped as a lot to go through repeated sequences of operations to build circuitry. Lot scheduling is an important task for manufacturers to improve production efficiency and meet customers’ requirements of on-time delivery. In this research we propose a dispatc...

We consider a single-machine scheduling problem with equal-sized jobs. The objective is to minimize the maximum weighted earliness-tardiness and due-date costs. We present an algorithm to solve this problem. Our algorithm makes use of bottleneck jobs and priority queues, and has a computational complexity of O(n logn). This complexity is a significant improvement of the existing algorithm in th...

A new meta-heuristic for scheduling multiple jobs on a single machine so that they are completed by a common specified date (neither earlier, nor later) is addressed in this paper. Costs are set depending on whether a job finished before (earliness), or after (tardiness) the specified due date. The objective is to minimize the total weighted earliness and tardiness penalized costs from the spec...