Consider a rectangular art gallery divided into n rectangular rooms, such that any two rooms sharing a wall in common have a door connecting them. How many guards need to be stationed in the gallery so as to protect all of the rooms in our gallery? Notice that if a guard is stationed at a door, he will be able to guard two rooms. Our main aim in this paper is to show that Èn/2 ̆ guards are alway...

This paper presents a new model, MUSCLE (Multidirectional Scanning for Line Extraction), for automatic vectorization of raster images with straight lines. The algorithm of the model implements the line thinning and the simple neighborhood methods to perform vectorization. The model allows users to define specified criteria which are crucial for acquiring the vectorization process. In this model...

Reflections on the relationship between Iranian ELT researchers and practitioners suggest that research-practice gap has been an endemic feature of our language education programs. This issue has recently become a prime concern for many educational researchers, policy makers and other stakeholders. As such, calls for empirical investigations of measures to be taken in order to improve the relat...

Reflections on the relationship between Iranian ELT researchers and practitioners suggest that research-practice gap has been an endemic feature of our language education programs. This issue has recently become a prime concern for many educational researchers, policy makers and other stakeholders. As such, calls for empirical investigations of measures to be taken in order to improve the relat...

construction plans are regarded as the basis of the economy in the society. any delays in the utilization of projects can cause to waste the investments and the loss of technical and economic justifications. in this paper, the barriers of on-time delivery in water projects will be scrutinized in mazandaran regional water company. so, the independent variables such as management obstacles, cultu...

background and objectives: high performance research activity in the health domain is crucial to overcoming ever-growing health-related problems. despite availability of data sources, only a limited number of researchers use these data to derive health-related information. thus, the present study aimed at exploring the barriers to research promotion as perceived by the university health researc...

the current study aims to identify the effective factors and barriers to loyalty in electronic banking services in the private banks customers. for this purpose, a survey was done with a questionnaire sampling from 420 customers of private banks in golestan province, who have used electronic banking services in 2011. the results indicated that seven factors including preference, customer satisf...