Abstract : The purpose of this research is to determine the influence of the beliefs of higher education students towards the adoption of cryptocurrencies, based on the theory of planned behavior. The hypothesized model was tested on 174 students from a university in northern Chile, through an online survey. The results partially support the theory, that is, attitudes and perceived behavioral control have a positive and significant relationship with respect to intention, and this last one has a positive and significant relationship with respect to purchasing behavior. Finally, the theoretical and practical implications, as well as the limitations of the study, are discussed.. Full article
Abstract : Artificial intelligence techniques play a promising role in designing decision-making systems in agriculture. Several artificial intelligence techniques have been adopted to design various agricultural decision support systems worldwide during the past three and a half decades. Over time, the application trend of such techniques has been changed and opened several new frontiers. A scientific study can lead aspirant researchers to choose an appropriate technique before designing such systems in agriculture. Instead of a mere literature survey, a statistical method of trend analysis and forecasting is essential to explore the past, present, and future trajectory of applying such techniques. This paper presents a statistical framework to analyze and forecast the application trend of the five most popular intelligent techniques in agriculture using the time-series data of the past 35 years. In the first step, as a well-established nonparametric method of trend test, the Mann-Kendall statistics have been applied to assess the existence of a trend. In the second step, a forecasting model has been proposed using the Autoregressive Integrated Moving Average approach to predict the future trend and prospect of applications of such systems with precision. Finally, the prediction accuracy has been measured using three popular scaled error metrics.. Full article
Abstract : Exposure to ambient gaseous components is a significant issue for people’s health. This study aims to check the modification effect of seasonal temperature variation on the association of ambient air pollutants in the selected traffic crossroads in Baghdad city. The study continued for around 180 calendar days from the winter of 2020 to the summer of 2021; during this period, seven major gaseous parameters, including VOCs, NO2, CO, CO2, H2S, SO2, and ground O3, were tested via using the devices of GIG6 and GIG2. The results showed that the high temperature significantly affected the dispersion of air pollutants, whereas the increase in air temperature from 10˚C to 48˚C led to an increase in the concentration of H2S about ten times, and an increase in emission of CO around three times, while there are varying increases for the rest of the other air pollutants.. Full article
Abstract : Zinc Oxide (ZnO) is a crystal that is widely used in various purposes as an additive in paints, ceramic materials, catalysts, electronic equipment, and semiconductors. One application of nanoparticles is the addition of nano zinc oxide (ZnO) to the coating which can increase corrosion resistance higher than without nano ZnO. This research method uses a Planetary Ball Mill with variations of disk rotation speed of 300 and 400 rpm and the use of grinding balls of 5 and 10 mm. From the results of this study, variations in disk rotation speed and the use of grinding ball sizes can affect particle size.. Full article
Abstract : Hydraulic Jump (HJ) is an important natural phenomenon in rivers, channels and spillways. The length of aprons and the energy between upstream and downstream must be considered. This research proposed a new model to study the parameters of the hydraulic Jump in a new channel shape like a trapezoidal Channel with side slop 1:1. It also studies more than one shape of sills to control the hydraulic Jump, which can lead to energy dissipation. The experiments were conducted over a range of Froude numbers 2.5 to 7.2. Widely runs were conducted, and measurements were undertaken and presented. The results were discussed for three shapes of the sill (straight, triangular, and trapezoidal). The results further revealed that the trapezoidal shape decreased the length of a hydraulic jump to 67% to the same Jump with no sill at the best position of 30 % of Ls/Lf. However, the trapezoidal sill is more efficient with 13% than the triangular sill and 17% than the straight sill at the same position.. Full article