The paper begins by outlining the role and importance of coal as a source of energy and in the steel industry. It briefly describes the longwall method of working together with the conventional machinery used in the method. A mathematical model is then proposed that shows the relationship between the gradient of the coal seam, that of the face and the entries to the panel. Determination of a mo...

The appropriateness of a location to be selected as a seminar location is affected by many supporting factors, so that the location is suitable as a single choice. Hence, there should be made a process to decide a location whether it is proper or not to match some assessment criteria conceived before. There are 8 assessment criteria with 22 sub-criteria each. The result of the assessment forms ...

the environmental problems, in different dimensions, are resulted from the lack of environmental considerations and criteria in locating new cities. the main purpose of this article is to compare different criteria based on library studies and expert opinions and determining suitable criteria in order to evaluate the environmental potential to establish new cities to achieve urban permanent dev...

a 56 year old man was admitted to our center for further evaluation of typical chest pain of ten months' duration. selective coronary angiography was done and showed a sewing needle-like foreign body which was lying in very close proximity to the anatomic location of the right coronary artery. at operation two pieces of sewing needles were removed, one from the coronary sinus and the other...

Determining the location and orientation of straight lines in images is a problem of great importance in the field of image processing. The Hough transform, has been widely used to solve this problem for binary images, and is still by far dominating the scene when it comes to line detection and its concept was further developed to detect other shapes like circles. In this paper, a new method fo...