Juniper Publishers Journal Of Civil Engineering

 Civil Engineering Research Journal- Juniper Publishers   Abstract Theory of Planned Behavior (TPB) is one of the most widely used psychological models when it comes to explaining road safety behaviors. Recently, studies have also been conducted from the perspective of dual-process models. However, the present is the first study on road safety behaviors that integrates both perspectives. The study evaluates the roles of both implicit attitudes and TPB constructs in the prediction of mobile phone use while driving. Method a sample of 100 drivers completed: (1) a self-reporting instrument on Mobile phone use while driving, (2) a questionnaire addressing TPB constructs, (3) an indirect measure of attitudes (Implicit Association Test), and (4) a social desirability scale. Results suggest that both types of attitudes make a significant and quite similar contribution to the explanation of Mobile phone use while driving. Interestingly, implicit attitudes were a better predictor than ...

 Civil Engineering Research Journal- Juniper Publishers   Abstract Positioning is considered as one of the most important problems in civil engineering and surveying works. Today, satellite techniques are widely used for positioning. Global navigation satellite systems provide three-dimensional coordinates (latitude, longitude, and height), related to the reference ellipsoid surface. In most engineering projects, however, orthometric height related to the geoid is required. Therefore, separation between ellipsoid and geoid need to be known to convert ellipsoidal height into geoidal height which nearly approximates mean sea level. The ellipsoid is a mathematical surface, while the geoid is a physical one. This leads to problem of modelling the geoid. In this paper, multiple regression method was used to model the geoid in a defined area that resembles a big city. Riyadh city, capital of Saudi Arabia has been used as a case study. It has been found that fifth degree polynomials ...

 Civil Engineering Research Journal- Juniper Publishers   Abstract It is shown in the article that a planetary continuously variable transmission is the result of the development of a gear according to the criterion of gear ratio, and its features caused by the need for the formation of kinematic chains are considered. Go to Introduction In our opinion, the planetary smoothly adjustable transmission is capable of satisfying the need for a continuously variable gear, which is becoming more and more clearly emerging in recent times, the operation principle of which implies radical changes in the gear design, namely, fragmentation of the central gear and satellite. For a more complete understanding of its possible role in the class of mechanical gears, it is necessary to turn to the sources of its origin. Go to Main Part A continuously variable planetary gear is the result of the natural development of such a technical object as a gear known for millennia. The following reasoning...

 Civil Engineering Research Journal-Juniper Publishers   Abstract Innovation in the construction sector occurs as stepwise reconfigurations of subsystems, but sometimes the effect of many systems coincides and there is so called radical change. Stepwise reconfigurations of individual systems such as windows, insulation, and heat recovery systems have made it possible to heat buildings with preheated inlet air instead of water radiators. Thus, making building more sustainable, cheaper and resource-efficient; the potential for radical change has been achieved. The question is then why not every new building uses preheated inlet air? The reason is not the lack of innovation or new technologies. It is rather connected to malfunctioning structures related to incentives, collaboration, testing, and validation, resulting in norms and standards that aim to reproduce existing technologies, preferring incremental innovations over radical ones. This article argues that testbeds and Livin...

 Civil Engineering Research Journal- Juniper Publishers   Abstract The flow in the composite channel is different from the simple channel due to the strong flow exchange between the main channel and the flood plain. In this study, the flow pattern of composite channels under non-vegetated and parallel vegetation conditions was investigated. To investigate the effect of vegetation density on flow pattern, the ratio of the distance between plants to their diameter (L / D) was used. This ratio was assumed to be 3, 8 and 16. The results showed that the longitudinal velocity and average depth velocity in the main channel for the vegetation-less state were less than vegetation-state and the opposite was observed in the floodplain. In the vegetation-free state, as the main channel moves toward the floodplain, the average deep velocity decreases, and then increases in the joint season between the main channel and the floodplain, and then continues downward. In a parallel arrangement, ...