Muthanna Journal of Engineering and Technology(MJET)

In all countries around the world, roads and highways constitute a vital and significant component of the transportation infrastructure and are crucial for the growth of local economies and societies. The term “Pavement Management System” (PMS) refers to a precise and systematized arrangement of defined procedures for collecting, analyzing, maintaining, and reporting pavement data that enables decision-makers to identify the most suitable arrangements and strategies for maintaining the pavements in the functional order for a given specific period at the least profitable cost. To maximize results within a certain budget, the system will next prioritize and suggest pavement rehabilitation and maintenance. The maintenance system in use tracks a variety of elements, including the cost of the activities required to conduct maintenance and the types of materials, personnel, and equipment. After segmenting the road into sections, this technique uses visual or automated field inspection, and its data is subsequently entered into a database. Following the analysis of this data, either by software or by a subject-matter expert, recommendations for the project will be given in the future. Next, based on the budget that is available, the type of surface, and the state of the road, the PMS develops a deterioration curve for each segment of the road. Finally, it chooses the best cost-effective maintenance approach. All of this is precisely accomplished using a PMS, which offers the right pavement treatment at the right time to extend the pavement’s life for a reasonable amount longer and at a lower maintenance cost.

Sensor network programs that predict and control security have been studied using a huge amount of data. This work views The inadequacy of current security measures is a problem with security standards. To make it simpler to choose security measures that would meet needs, have an impact on genuine security, and maintain track of the network’s counting process, the concept of a “network security line” has been proposed. Network security was altered both before and after the event, according to these changes. The security of the topology is then assessed as a counterattack defense utilizing a number of stochastic process-based models. Lastly, by creating a distributed data model, a risk-receiving data model, data feature removal, reconstruction, and an evaluation approach are used to create the experimental risk model. According to the testing findings, when the distance is between 10 and 40 meters, this method is more than 90% successful. The operating power, which is less than the standard requirement, is 196~461 Hz. They perform better in real-time than conventional models. The date timing discrepancy is no more than 0.3 seconds. Despite the improved precision, the relative error is reduced by 3%.

In this study, the dynamic response of steel beams with hexagonal web openings (SBHWOs) is numerically examined. ABAQUS was used to create precise 3D nonlinear finite element models (FEMs). The impact forces, displacement histories, and failure shapes from published experimental tests were used to verify the FEMs built in the current study. Both the numerical and experimental results were found to be in good agreement in terms of displacement and failure shape, in addition, to impact force. It has been established that the FE models proposed were capable of addressing the entire response of the samples in elastic, plastic, and damage stages, despite the slight variation in the level of accuracy that was observed. Furthermore, the current study examined the relationship between impact energy, opening spacing, and opening height to determine how these factors affect the dynamic responses of SBHWOs. The results showed that both the magnitude of the displacement and the duration of the impact increase as the impact energy does. The maximum impact force was higher, but the impact duration and after-impact displacement were both lower when the opening spacing was increased. Increasing in opening height led to decreases in maximum impact force and average plateau impact force corresponding to an increase in impact duration and post-impact displacement

Titanium – Aluminum niobium oxide composite was fabricated by powder metallurgy technique. The effect of Nb2O5 ratio addition with (1, 1.5, 2, 2.5 wt %) ontheirmechanical, thermal, and microstructure were investigated. By introducing 2.5 % of Nb2O5 the hardness and compressive strength were increased approximately 20% and 46% respectively more than that of pure sample. while weight loss decreased to 4 2% at same ratio. Thermal Conductivity of composite in different temperatures (25, 50, 75 and 100 °C) was decreased 39, 43, 49, and 53 % respectively. Ti-6Al- 2.5 % Nb2O5 composite formed porous shape with niobium oxide. This kind of composite could be a promising candidate for implant material.

The research investigates the wealth and richness of the heritage markets in the center of old Najaf city, which considers one of the most prominent urban landmarks and the tissue cells that make up the city and an essential element in its emergence. An attempt to explore whether, (the market) as cultural heritage is deteriorating or the processes of development and change are compatible with its historical value, thus knowing the extent to which its richness and urban spatial value have been preserved in the city. Hence the idea of research in defining the vocabulary that contributes to maintaining the richness of the heritage markets in general and the great Najaf market as a special case study and to identify how to preserve the richness of this landmark through time, hence the problem of research in “the lack of knowledge about identifying the mechanisms of preserving the richness of this landmark over time. Heritage markets and the diagnosis of the appropriate mechanisms and procedures to reveal the extent of maintaining their urban wealth “. Studies dealt with the promotion of needs either or not, and the application of these terms to the great market of the city of Najaf. The research concluded that enhancing wealth and preserving the value of markets depends on in two basic words, namely (the formal level) to highlight the urban language of the place and (the morphological level) to confirm structural interconnectedness, which is considered the basic bases for managing wealth and enhancing its historical and heritage value within urban city centers.