This paper analyses polytechnic graduate placement in Finnish manufacturing. The paper uses a register-based data source covering white-collar manufacturing workers over the period 1995–2004. Taken together, the results show that wages and job classification are higher for polytechnic graduates, once other covariates are controlled for. Despite this, almost 20% of graduates from polytechnics ha...

The problem we consider in this article is motivated by data placement in particular data replication in video on demand systems. We are given a set V of n servers and b files (data, documents). Each file is replicated on exactly k servers. The problem is to determine the placement that minimizes the variance of the number of unavailable datas. To do that, we consider the problem of determining...

The advances in computer and communication technologies made possible an ubiquitous computing environment were clients equipped with portable devices can send and receive data anytime and from anyplace. Due to the asymmetry in communication and the scarceness of wireless resources, data broadcast is widely employed as an effective means in delivering data to the mobile clients. For reasons like...

In distributed systems, communication cost is one of the major concerns. Many existing research have been conducted on placement of data to reduce communication cost and improve performance in widely distributed systems. All these research works focus on independent data objects. However, data are correlated due to accesses from clients and the correlation has some impact on date placement. In ...

Wireless technology has become very widely used; and an array of security measures, such as authentication, confidentiality strategies, and 802.11 wireless communication protocol based security schemas have been proposed and applied to real-time wireless networks. However, most of the measures only consider security issues in static mode, in which security levels are all configured when wireles...