In this paper we have proposed a dynamic buffer allocation algorithm for the prefix, based on the popularity of the videos. More cache blocks are allocated for most popular videos and a few cache blocks are allocated for less popular videos. Buffer utilization is also maximized irrespective of the load on the Video-on-Demand system. Overload can lead the server getting slowed down. By storing t...

PT. XYZ is engaged in the production of snacks. This company makes products from raw materials to finished products. In packaging section using a machine called CingFong, problem that often occurs there buildup due waiting for machines have not maintenance so it can reduce productivity this factory. Overall method used Preventive Maintenance by looking Mean Time To Failure (MTTF) identify criti...

This paper describes a bit allocation algorithm that can achieve a constant bit rate when coding multiple video objects (MVO’s), while improving the rate-distortion (R-D) performance over the reference method for MPEG-4 object-based rate control [1, 2]. In object-based coding, bit allocation is performed at the object level and temporal rates of different objects may vary. The proposed algorith...

Tulisan ini merupakan studi kasus yang terjadi pada boiler di Pembangkit Listrik Tenaga Uap (PLTU) Rembang setelah penulis melaksanakan magang sana. PLTU memiliki peran strategis dalam sistem kelistrikan Indonesia, karena dinilai lebih ekonomis dan hasil energi memadai. Salah satu komponen adalah boiler. Boiler alat untuk mengubah panas menjadi gerak, menggerakkan turbin agar menghasilkan listr...

Manufacturing systems must be supported by the availability of materials, a streamlined production process and prepared line to achieve target. In mass customization manufacturing system, number machines required for is relatively small. Conse-quently, maintenance on critical will impact this system most. Two types strategies are implemented: corrective preventive maintenance. The requires more...

Preventive maintenance (PM) in the production industry is one of most essential measures to eliminate accidental machinery failures by replacing/repairing worn out machines or parts. The decision when and where perform preventive non-trivial due complex stochastic nature PM implemented. This article deals with theoretical practical implementation based on a unique modification total productive ...

Traditional maintenance planning is based on a constant maintenance interval for equipment life. In order to consider economic aspect for time based preventive maintenance, preventive maintenance is desirable to be scheduled by RCM(ReliabilityCentered Maintenance) evaluation. So, Markov state model is utilized considering a stochastic state in RCM. In this paper, the Markov state model which ca...

In this paper, we consider a flow shop scheduling problem with availability constraints (FSSPAC) for the objective of minimizing the makespan. In such a problem, machines are not continuously available for processing jobs due to preventive maintenance activities. We proposed a mixed-integer linear programming (MILP) model for this problem which can generate non-permutation schedules. Furthermor...