Stock prepositioning is one of the most important issues in preparedness stage of emergency logistics response. In a previous research, a stock prepositioning model to support an emergency disaster relief response in the event of earthquake has been proposed. Since the results contained zero proportion of some type of item, which is not allowed in a real system, an improvement of the model is n...

Loss of customer goodwill in uncapacitated single level lot-sizing is studied with a mixed integer programming model extending the well-known Wagner-Whitin (WW) model. The objective is to maximize profit from production and sales of a single good over a finite planning horizon. Demand, costs, and prices vary with time. Unsatisfied demand cannot be backordered. It leads to the immediate loss of ...

Multi-echelon inventory systems are one of the most important and attractive areas in modelling supply chain management so that several researches and studies have been done about. In this paper, the total cost function of a two-echelon inventory system with central warehouse and many identical retailers controlled by continuous review inventory policy is estimated. We have assumed the demand i...

Max-SAT is the problem of finding an assignment minimizing the number of unsatisfied clauses of a given CNF formula. We propose a resolution-like calculus for Max-SAT and prove its soundness and completeness. We also prove the completeness of some refinements of this calculus. From the completeness proof we derive an exact algorithm for Max-SAT and a time upper bound.

BACKGROUND Chronic pharmacotherapy is recommended to patients with persistent moderate-severe (PM-S) allergic rhinitis (AR). The cost of pharmacotherapy is the main barrier to achieve symptoms control. AIMS OF THE STUDY To determine the benefits of mite subcutaneous immunotherapy (SIT) in patients with PM-S AR not satisfied with chronic pharmacotherapy received free of charge. METHODS Open ...

This paper aims to solve the operator allocation optimization problem for line balancing control under two unsatisfied conditions. An approach is proposed for combination condition adjustment. An adjusted recursive operator allocation optimization algorithm is developed for generating the optimal solution under these two conditions adjusted.

multi-echelon inventory systems are one of the most important and attractive areas in modelling supply chain management so that several researches and studies have been done about. in this paper, the total cost function of a two-echelon inventory system with central warehouse and many identical retailers controlled by continuous review inventory policy is estimated. we have assumed the demand i...

BACKGROUND Insufficient cement distribution (ICD) in the fractured area has been advocated to be responsible for unsatisfied pain relief after percutaneous vertebroplasty (PVP) for osteoporotic vertebral compression fractures (OVCFs). However, little is known about risk factors for the occurrence of ICD. OBJECTIVE The present study aimed to identify independent risk factors of the emergence o...

In this paper we describe a new approach that uses multicriteria decision making and the analytic hierarchy process (AHP) for integrating privacy and safety criteria into planning tasks. We apply the approach to the journey planning using two criteria: (i) a willingness-toshare-data (WSD) metric to control data disclosure, and (ii) the number of unsatisfied safety preferences (USP) metric to mi...

Neglecting patients' rights in a health care system can give rise to a challenging situation between health care providers and patients. The purpose of this study was to compare the views of patients as recipients of healthcare services and physicians and nurses, as healthcare providers, regarding the unsatisfied demands of different aspects of patients' rights in 3 hospitals representing three...