The composition model in the Unified Modeling Language, version 2 (UML 2), is a major upgrade to the familiar " black diamond " composition of earlier versions. It supports connections between parts at the same level of decomposition, in addition to the usual part-whole associations. Complex networks of entities can be represented within a single class, inherited to subclasses, with links maint...

In a modern computer, the CPU operates on values in its registers, and can fetch values from main memory, usually via several layers of caches. Large files are stored on disk, and data is transferred from disk to main memory. The memory closest to the CPU is fastest but smallest, and the memory farthest from the CPU is largest but has the highest latency. Moreover, the slower layers of memory h...

This paper presents a maximum entropy machine translation system using a minimal set of translation blocks (phrase-pairs). While recent phrase-based statistical machine translation (SMT) systems achieve significant improvement over the original source-channel statistical translation models, they 1) use a large inventory of blocks which have significant overlap and 2) limit the use of training t...

We use the cognitive architecture ACT{R to model a simple application task domain. Using a technique we call \Task Model Tracing," we have implemented a general mechanism for enhancing direct manipulation in a simple application's user interface. The task model tracing system is a layer between the application and the user interface that anticipates and follows possible user plans and agendas. ...

abstract textbook design and evaluation has recently turned into a very important area in english language teaching. this paper evaluates the english textbooks taught in iranian junior high schools: right path to english which was the medium of instruction until 2013 and the recently designed textbook-prospect- which replaced it. for this purpose, tucker’s (1975) textbook evaluation model was e...

the entanglement at zero-temperature is studied in a two-qubit xz spin-1/2 chain model in anexternal magnetic field which is applied in the z direction. we have obtained an analytical relation forthe effect of the external magnetic field on the concurrence. it is shown that the ground state of thesystem depends on the strength of exchange coupling. we have shown that the analytical relation oft...

the potential energy surface pes of (h2)2 dimer has been investigated, using five simple rigid rotor models. these models are called: head to head, symmetric side to side, l , steplike and t model. all calculations were done at two levels of ab initio  methods: mp2(full) and qcisd (t,full) using cc-pvtz basis set at singlet state of spin multiplicity. the results of scanning pes were then fitte...