background: perioglasâ (pg) is an alloplastic material used for grafting periodontal osseous defects since 1995. in animal models, it has been proven that pg achieves histologically good repair of surgically created defects. in clinical trials, pg was effective as an adjunct to conventional surgery in the treatment of intrabony defects. because the molecular events due to pg that are able to al...

Reducing cost of material handling has been a big challenge for companies. Flexible manufacturing system employed automated guided vehicles (AGV) to maintain efficiency and flexibility. This paper presents a new non-linear mathematical programming model to group n machines into N loops, to make an efficient configuration for AGV system in Tandem layout. The model minimizes bot...

in today’s dynamic market, organizations must be adaptive to market fluctuations. in addition, studies show that material-handling cost makes up between 20 and 50 percent of the total operating cost. therefore, this paper considers the problem of arranging and rearranging, when there are changes in product mix and demand, manufacturing facilities such that the sum of material handling and rearr...

cell banking is long –term storing of cell stocks that requires intensive care and maintenance to ensure its adequate quality. the main goal of a biological bank is preparing a repository source of cell culture system in a global manner. on the other hand, cell culture is an invaluable tool for investigators in numerous fields. successful maintenance of cells requires knowledge and practice of ...

background: today, the prevalence of musculoskeletal disorders is one of the health issues of concern in any society. one of the main causes of musculoskeletal disorders and conditions can be named unpleasant working conditions. the aim of this study was to report the prevalence of musculoskeletal disorders including working postures and lifting-related musculoskeletal disorders among workers o...

In this paper we are to present a practical application of Axiomatic Design (AD) methodology, as a roadmap to lean production, in redesigning a car body assembly line. Axiomatic Design theory provides a framework to simplify the whole problem. According to the AD principles, a hierarchical structure has been developed. The developed structure originated in lean manufacturing principles and exis...