Semiconductor manufacturing facilities are very complex. To obtain a fundamental understanding of the effects of dispatch and lot release rules on the factory performance based on a full factory model is difficult. In this paper, we therefore present a simple factory model that is intended to show essentially the same behavior as the complete factory. The model consists of the bottleneck workce...

In this paper, based on Key Performance Indicator (KPI) and Key Activity Indicator (KAI) as the fundamental data for calculating defined factory performance function, evaluation system of factory performance is discussed by following four phases. 1) Designing framework for evaluation system of factory performance, 2) Constructing structure of KPI/KAI database, 3) Formulating evaluation of facto...

Acanthamoeba are infected by a remarkable diversity of large dsDNA viruses, the infectious cycles of which have been characterized using genomics, transcriptomics and electron microscopy. Given their gene content and the persistence of the host nucleus throughout their infectious cycle, the Marseilleviridae were initially assumed to fully replicate in the cytoplasm. Unexpectedly, we find that t...

Anti-patterns, one of the reasons for software design problems, can be solved by applying proper design patterns. If anti-patterns are discovered in the design phase, this should lead an early pattern recommendation by using relationships between antiand design patterns. This paper presents an idea called Antipattern based Design Pattern Recommender (ADPR), that uses design diagrams i.e. class ...

The abstract factory design pattern is a well known and widely applied design in the construction of object-oriented software. An amendment to the abstract factory is presented based on the \envelope/letter" idiom. This results in factory products being instantiated in application code in a manner apparently independent of the factory pattern. Application code can thus forget about the factory,...

Nowadays, knowledge has a major role in factory efficiency. The integration of knowledge and decision support systems in the whole factory process appears as a key for the factory of the future. The basic concept of our research work is facilitating interactions between the human being in critical working situations and information set in the factory. Our proposition is to develop a “digital fa...

This paper proposes a systematic method of creation and application of a virtual factory. Basic definition of a of virtual factory is first given , followed by its foundation principles and architectural overview, and then a systematic method based on object technologies is proposed to create the virtual factory. Specially, for a real manufacturing environment, a corresponding virtual factory c...

Ad hoc communication applications, such as computer-facilitated collaboration, have become possible with the rapid advancements in portable computing and ad hoc wireless networking. Ad hoc communication solutions require a balance between private communications and access to corporate networked services in order to succeed. In this paper, we discuss and offer some approaches in integrating ad h...

Reset controllers are linear controllers that reset some of their states to zero when their input is zero. We are interested in their feedback connection with linear plants, and in this paper we establish fundamental closed-loop properties. This paper considers more general reset structures than previously considered, allowing for higher-order controllers and partial-state resetting. It gives a...

the most important factor in evaluating dental health is dmft (decayed, missing, filled, teeth). this research was conducted to compare dmft index in the workers of sweets and cable factories of shahrood (moghan), a small city near 300 km east of tehran. all the 127 production line workers of cable factory and 124 workers of sweets factory who had the predetermined criteria were selected. a que...