Juniper Publishers Journal Of Civil Engineering

 Civil Engineering Research Journal-Juniper Publishers   Abstract In this literature review paper, undergraduate senior Civil Engineering students from California State University, Northridge, under the supervision of Dr. Tadeh Zirakian and Dr. David Boyajian, introduce a research on orifice meter and its applications in real life while analyzing the effect of variables, such as flow, velocity, pressure, and volume. Orifice flow meter is the most commonly used device for gas flow measurement. For a most accurate measurement, the orifice meter should be applied to gas flows, which are steady or vary slowly with time, are in the turbulent flow region, and are well below sonic velocity. The gas should be single phase and not contain suspended particles. Availability of sufficient permanent pressure loss is a requirement for any head-measuring device and must be considered in its application. Completion of this virtual research achieved several educational endeavors, namely enabling the st

 Civil Engineering Research Journal- Juniper Publishers   Abstract Major urban arterial streets in large cities are experienced a serious traffic accident problem. This study attempts to investigate the possible effect of traffic volumes and arterial geometry on traffic accidents, where arterials in Amman city were selected as a case study. Based on a set of predefined criteria, eight major urban arterial segments were selected. The number of traffic accidents and traffic volumes were obtained from the Public Security Directorate and Greater Amman Municipality, respectively, for the period from 2015 to 2017. Other geometric and operational data were obtained through field survey. The total sample sizes for daily and hourly accidents consisted of 1407 and 33768 observations, respectively. Negative Binomial regression model was used to investigate the impact of urban arterial traffic volumes and geometric design variables such as, segment length, number of horizontal curves, lane width,