Mass transfer studies are carried out in a bubble column with an internal diameter of 14 cm and various static liquid heights. The mass transfer coefficient is evaluated by using an oxygen sorption method. A model considering the gas holdup flushing and the sensor response is used. The interfacial mass transfer area is determined according to the measured bubble size distribution. The liquid-si...

An H.323 CDR collecting and consolidating architecture based on Radius is presented. The important fields involved in the consolidation process for Cisco gateways and GnuGK CDRs are investigated and a unique record format is defined. From the database, various statistics are extracted including disconnection causes, call distribution over a day, number of calls over a day period, call quality a...

These days a massive deployment of VoIP is taking place over IP networks. VoIP deployment is a challenging task for network researchers and engineers. This paper presents a detailed simulation approach for deploying VoIP successfully. The simulation uses the OPNET network simulator. Recently OPNET has gained a considerable popularity in both academia and industry, but there is no formal or know...

Developing countries like India are observing an increasing trend in the penetration of mobile phones towards the base of the pyramid (lower strata of the society). This segment comprises of users who are novice and semiliterate and are interested in the basic usage of the mobile phone. This paper explores one of the basic features, the address book for its usability and presents an enhanced sy...

Currently the Peer-to-Peer computing paradigm rises as an economic solution for the large scale computation problems. However due to the dynamic nature of peers it is very difficult to use this type of systems for the computations of real time applications. Strict deadline of scientific and real time applications require predictable performance in such applications. We propose an algorithm to i...

Corporate Social Responsibility (CSR) has become an important subject for business. Corporate Social Responsibility (CSR) is newly emerged concept for Turkish companies. This paper is investigated the current status of CSR efforts in the Turkish automotive distribution companies. Sabanci Holding, Dogus Group and Koç Group are selected as the top three best CSR practice cases for Turkish automot...

Some Times Sensitive Data may be distributes by a data distributor to a set of trusted agents (third parties), But Some of the distributed data we may find in an unauthorized website or systems. So the distributor must assess the probability of data leakage from its trusted agents. So in this paper we propose a model for assessing the guilt probability of agents, in a way that improves the chan...

This paper aims to analyse the opportunity of using multi-level marketing (MLM) as a tool of relationship marketing. The research is firstly based on an analysis regarding the issues about the legality of MLM techniques in the context of EU and US regulation systems. The outcomes of this research stress the main characteristics of legal network marketing and how a person which wants to become i...

This paper considers the Dynamic Multi-Period Vehicle Routing Problem which deals with the distribution of orders from a depot to a set of customers over a multi-period time horizon. Customer orders and their feasible service periods are dynamically revealed over time. The objectives are to minimize total travel costs and customer waiting, and to balance the daily workload over the planning hor...