Equatorial ionosphere poses a challenge to any algorithm that is used for tomographic reconstruction because of the phenomena like the Equatorial Ionization Anomaly (EIA) and Equatorial Spread F (ESF). Any tomographic reconstruction of ionospheric density distributions in the equatorial region is not acceptable if it does not image these phenomena, which exhibit large spatial and temporal varia...

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regardless of severity, earlier intervention to correct hearing loss in children improves speech development and conversational abilities. a cross-sectional study was performed on 230 neonates who were at risk of hearing loss in tehran university of medical sciences hospitals between september 2000 and february 2002. hearing was examined before the 3rd month by auditory brainstem responses (abr...

background: stillbirth is a sensitive indicator for health care quality, living conditions and equity in a society. the aim of this study was to determine the rate and contributing factors of stillbirth at babol hospitals. methods: this cross-sectional, descriptive, analytical study was designed as an applied research, using census sampling in 2012-2013. a questionnaire was applied for data col...

This study aims to understand certain linguistic and semantic resources for the text construction, namely the constructs of cohesion, coherence. The analysis of cohesive ties was conducted on the writing samples of 40 subjects (20 most coherent and 20 least coherent) Iranian undergraduates of English. This prompted us to identify the dominant types of cohesive devices used in most coherent writ...

in order to estimate doa of coherent sources, shirvani moghaddam and keshavarz nasab proposed a method based on uniform linear array configuration that first determines the number of noncoherent sources and then estimates the doa of coherent signals in each group. for estimating doas close to the array endfire, ula does not perform well. as the main goal of this investigation, using the propose...

in this paper, a new formula is applied for the calculation of gravity anomalies from a cylinder model representing a geological body. compared to conventional methods, this new development allows the cylinder to be freely oriented in space. 38 gravity forward models are produced each of which anomaly attributes are calculated. then a linear relationship is established between attributes and so...