We prove some sufficient conditions for a directed graph to have the property of a conjecture of J. (1982): "Every directed graph contains an independent set which meets every longest directed path". Let G be a directed graph, and denote by V(G) its vertex-set, by A(G) its arc-set, X(G) denotes its chromatic number, and A(G) the length of the longest directed path. Independently, B. Roy and T. ...

Recently, spammers have proliferated “image spam”, emails which contain the text of the spam message in a human readable image instead of the message body, making detection by conventional content filters difficult. New techniques are needed to filter these messages. Our goal is to automatically classify an image directly as being spam or ham. We present features that focus on simple properties...

As part of its type-safety regime, the Java semantics require precise exceptions at runtime when programs attempt out-of-bound array accesses. This paper describes a Java implementation that utilizes a multiphase approach to identifying safe array accesses. This approach reduces runtime overhead by spreading the out-of-bounds checking effort across three phases of compilation and execution: pro...

The scope of this work is the complete re-organization of production flow according to the Lean Thinking philosophy for the industrial applications. The complete re-organization implementation of material flow management has been performed through the supermarket sizing which replenishment kanban logic has been adopted. To implement this strategy the goal is to achieve "Interdependent connected...

Java just-in-time compiler for IA-32 platforms T. Suganuma T. Ogasawara K. Kawachiya M. Takeuchi K. Ishizaki A. Koseki T. Inagaki T. Yasue M. Kawahito T. Onodera H. Komatsu T. Nakatani Java has gained widespread popularity in the industry, and an efficient Java virtual machine (JVM ) and just-in-time (JIT) compiler are crucial in providing high performance for Java applications. This paper desc...

This study introduces a framework for re-design of manufacturing systems into practical optimum just-in-time systems by integration of computer simulation and analysis of variance. The conventional JIT approach is mostly applicable to static production systems and the dynamic production systems require a more practical integrated JIT approach. In addition, the re-design of existing dynamic syst...

This paper studies the level 1 cache performance of Java programs by analyzing memory reference traces of the SPECjvm98 applications executed by the Latte Java Virtual Machine. We study in detail Java programs’ cache performance of different access types in three JVM phases, under two execution modes, using three cache configurations and two application data sets. We observe that the poor data ...