the purpose of this paper is to design entrepreneurship model of agricultural extension in the context of agricultural sustainable development. in fact the purpose of this paper is to identify the prerequisite (the influential factors of entrepreneurship), process (development of entrepreneurial program in organization); context (extension perspective in the context of agricultural sustainable ...

Mandatory access control models have traditionally been employed as a robust security mechanism in multilevel security environments such as military domains. In traditional mandatory models, the security classes associated with entities are context-insensitive. However, context-sensitivity of security classes and flexibility of access control mechanisms may be required especially in pervasive c...

abstract background: appropriate quality achievement of a phd program requires frequent assessment and discovering the shortcomings in the program. inputs, which are important elements of the curriculum, are frequently missed in evaluations. the purpose of this study was to evaluate the input indicators of reproductive health phd program in iran based on the context, input, process, and product...

Resources and services are accessible in pervasive computing environments from anywhere and at any time. Also, due to ever-changing nature of such environments, the identity of users is unknown. However, users must be able to access the required resources based on their contexts. These and other similar complexities necessitate dynamic and context-aware access control models for such environmen...

A computer conversational system can potentially help a foreign-language student improve his/her fluency through practice dialogues. One of its potential roles could be to correct ungrammatical sentences. This paper describes our research on a sentence-level, generation-based approach to grammar correction: first, a word lattice of candidate corrections is generated from an ill-formed input. A ...

Generative statistical models of chord sequences play crucial roles in music processing. To capture syntactic similarities among certain chords (e.g. in C major key, between G and G7 and between F and Dm), we study hidden Markov models and probabilistic context-free grammar models with latent variables describing syntactic categories of chord symbols and their unsupervised learning techniques f...