Access control has traditionally assumed a single, monolithic authorization policy, generally expressed as an access matrix. We argue that this assumption does not fit ecommerce applications, which are governed by a potentially large set of independently stated, evolving contracts. In order to support this growing class of applications we propose an enforcement mechanism which uses certified-co...

Writing something worthy of reading in a foreign language is challenging task. Students learning English as or second suffer most writing especially paragraph writing. Although studies have been conducted to explore errors composition Pakistani students, organization received little attention. Therefore, this study investigated the unity, development, and coherence paragraphs written by college...

A quantum theory of a two and three-level laser with injected atomic coherence is developed by using a density operator method, to the best of our knowledge, for the first time. The initial atomic coherence plays an essential role. At steady state, the equation of motion for the density operator yields to exhibit laser without inversion and a phase locking but no threshold for the laser fie...

Background: Ensuring adequate depth of anesthesia during surgery is essential for anesthesiologists to prevent the occurrence of unwanted alertness during surgery or failure to return to consciousness. Since the purpose of using anesthetics is to affect the central nervous system, brain signal processing such as electroencephalography (EEG) can be used to predict different levels of anesthesia....

The aim of this study includes investigation into the impact of education based on Gardner’s Theory of Multiple Intelligences (MI) on educational achievement of high school students (Grade II) in mathematics from Garmsar City. The current study is of applied type in terms of nature since research is seeking for testing of some theoretical concepts in real and live situations. Whereas the presen...

background: non communicable diseases (ncd) will account for 73% of deaths and 60% of the global disease burden by 2020. physical activity plays a major role in the prevention of these non‑communicable diseases. the stress involved in meeting responsibilities of becoming a physician may adversely affect the exercise habits of students. so, the current study aimed to study the practice of physic...

Natural sounds often contain energy over a broad spectral range and consequently overlap in frequency when they occur simultaneously; however, such sounds under normal circumstances can be distinguished perceptually (e.g., the cocktail party effect). Sound components arising from different sources have distinct (i.e., incoherent) modulations, and incoherence appears to be one important cue used...

Optical Coherence Tomography (OCT) uses the spatial and temporal coherence properties of optical waves backscattered from a tissue sample to form an image. An inherent characteristic of coherent imaging is the presence of speckle noise. In this study we use a new ensemble framework which is a combination of several Multi-Layer Perceptron (MLP) neural networks to denoise OCT images. The noise is...