This paper discusses an Economic Production Quantity model for Weibull deteriorating items over an infinite time horizon under fuzzy environment. Fuzziness is introduced by allowing the cost components such as setup cost, production cost, holding cost, shortage cost and opportunity cost due to lost sales to certain extent. Triangular fuzzy numbers are used to represent the mentioned costs. Opti...

People differ in the way they deal with ridicule. The study examines the personality correlates of those who fear being laughed at (gelotophobes), those who enjoy being laughed at (gelotophiles) and those who enjoy laughing at others (katagelasticists). Gelotophobes do not interpret laughter by others as something positive but more as a mean to put them down. Gelotophiles enjoy being laughed at...

It is known that personality is important in computer-mediated communication (CMC), influencing both how we express ourselves, and how we are perceived. Here we build in two ways on previous work which has used the LIWC text analysis tool to derive language factors relating to personality. First, we investigate whether linguistic factor structure in e-mail is similar to that in weblogs, and how...

In this paper, we consider a supply chain which consists of a single manufacturer and a single retailer with a single product type. Demand is assumed to be dependent on the retailer's stock level. Without coordination, the retailer determines its order quantity to maximize its own profit, which is usually smaller than the manufacturer's economic production quantity. Three coordination policies ...

In this paper, a multi-product economic production quantity problem with limited warehouse-space is considered in which the orders are delivered discretely in the form of multiple pallets and the shortages are completely backlogged. We show that the model of the problem is a constrained non-linear integer program and propose a genetic algorithm to solve it. Moreover, design of experiments is em...

Trade credit is an increasingly important payment behavior in real business transactions. To reduce nonpayment risks, a supplier/retailer frequently offers partial trade credit to its credit risk downstream member who must pay a portion of the purchase amount at the time of placing an order and then receives a permissible delay on the rest of the outstanding amount. This paper develops an EPQ m...

Cardenas-Barron [L.E. Cardenas-Barron, Economic production quantity with rework process at a single-stage manufacturing system with planned backorders, Computers and Industrial Engineering 57 (2009) 1105–1113] minimizes the annual total relevant cost TC(Q , B) to find the economic production quantitywith rework process at amanufacturing system and assumes that TC(Q , B) is convex. So, the solut...

This paper derives the optimal production-shipment policy for a vendor-buyer integrated system with rework process and a cost lessening product delivery plan. The objective is to derive the optimal production lot size and number of deliveries that minimizes total costs for the proposed vendor-buyer integrated system. This paper extends the work of Chiu et al. [Joint determination of the product...

Previous work has demonstrated that individuals with a repressive coping style (i.e. those high in defensiveness and low in trait anxiety) tend to show higher levels of physiological reactivity than nonrepressors. The present study examined archival data from a two-session experiment to assess whether repressors would show greater reactivity as measured by the eye blink component of the acousti...

E. Noorollahi et al. / Mathematical and Computer Modelling 56 (2012) 80–96 81 Ta bl e 1 A co m pa ra tiv e an al ys is of th e lit er at ur e. Au th or s N o. pr od uc ts Ty pe of de fe ct iv es Ty pe of re w or ki ng Ty pe of in sp ec tio n Ty pe of ba ck lo g Si ng le M ul tip le N o de fe ct iv e Re w or ka bl e Sc ra pe s N ot al lo w ed Im pe rf ec tP er fe ct N ot us ed Sa m pl in g 10 0%...