edge detection and edge enhancement techniques play an essential role in interpreting potential field data. this paper describes the application of various edge detection techniques to gravity data in order to delineate the edges of subsurface structures. the edge detection methods comprise analytic signal, total horizontal derivative (thdr), theta angle, tilt angle, hyperbolic of tilt angle (h...

In the present work the magnitudes of pigments in the synthetic leather, were measured by means of scanner. Initially synthetic leather samples pigmented by three different pigments of yellow, blue and red colors were prepared. Then the pigmented samples were scanned, and the values of RGB of images were calculated. The artificial neural network (ANN) method used to make relation between RGB va...

one of the most controversial problems in western epistemology is the division of propositions into analytic and synthetic. this division drew the attention of many proponents and opponents and faced many objections. one the most important objections which if valid enough, can destroy the basis of this division and resulting epistemological consequences is the of relativity of both analytic as ...

background: mental disorders may lead to several complications in adolescents’ people whose compensation is very difficult and sometime impossible. they are prone to emotional problems. therefore, knowing prevalence of diseases and valid statistical technique is necessary to plan for prevention and control of diseases. methods: in this cross-sectional study; direct, synthetic, and post-stratifi...

 Background: Essential oils of medicinal plants such as chamomile are very complex natural mixtures which can contain compounds at quite different concentrations and some of their components have antioxidant and antimicrobial activities in foodstuff. Objective: The antioxidant and antimicrobial effects of chamomile essential oil in cake preparation were evaluated during 75 days of storag...

Background: Synthetic biology is an interdisciplinary branch of biology and engineering. As synthetic biology develops into a promising science and engineering field, we need to clarify the purpose and nature of this science in terms of security, ethics and the recognition of the benefits of potential risks. The aim of this study was to evaluate the researchers’ attitudes toward synthetic biolo...