Volume 11, Issue 1, January 2020

Study of Bridge Pathologies in the Federal District/Brazil

Lucas Moreira Gomides, Yuri Sotero Bomfim Fraga, Wilber Humberto Vélez Gómez

Department of Civil Engineering, Euro-American University Center, Brasilia, DF, Brazil
Department of Civil and Environmental Engineering, University of Brasilia, Brasilia, DF, Brazil

Abstract- Bridges are important elements for the mobilization of society both in the scope of cargo and people transport and in the connection of roads, seeking to guarantee the continuity of the trajectory. For this, they must have adequate durability and useful life for the purposes for which they are intended. Thus, the objective of this research was to study the pathologies found on a bridge located in Brasilia, Federal District, Brazil. The study was developed through visual inspections and the carbonation test. The results show that the lack of periodic maintenance directly interferes with the reduction of the useful life of the structure, bringing out pathologies and negatively interfering with the bridge's functionality. It was possible to conclude that the bridge under study presents a critical state of conservation of the structure, requiring immediate interventions.

Keywords- Bridges, Carbonation, Durability and Pathologies

Download full paper PDF format (Page: 1-4)

IoT Based Approach for Assembly Modeling System with Adafruit Cloud

Mahnoor Khalid Paracha, Mubashir Ali, Aneela Mehmood, Mehreen Qamar

Department of Computer Science, Bahauddin Zakariya University, Multan, Pakistan
Department of Software Engineering, Lahore Garrison University, Lahore, Pakistan
Department of Computer Science, Lahore Garrison University, Lahore, Pakistan

Abstract- In this technological world, the Internet of Things (IoT) is new emerging technology which is revolutionizing the real world objects (i.e., cars, home appliances, baby monitor, etc) into automated virtual objects. These real world objects are connected by the help of embedded devices to the internet where they collect and share data by means of low cost computing. IoT has also a great impact in manufacturing zone and it brings changes in business prototypes. But in the application of current enterprises, an obstruction is encountered by computer aided software’s when they deal with dynamics, uncertainties and complexities. It is proclaimed that the problem can be solved by adopting IoT and cloud services in systems of enterprise. In this research paper, challenges in creating composite product’s assembly plans are discussed and IoT based approach for automation of assembly modeling system is presented by integrating cloud services. Adafruit cloud service and IoT are proposed in developing advanced systems from existing assembly system which deals automatically with complexities. The new approach has modularized architecture which is stable and flexible. Automated algorithm for assembly planning and object oriented templates is proposed for reusing the system parts. This approach efficiently reduces the complexity of system as well as decrease the error rate.

Keywords- Assembly Modeling, Internet of Things, Automation, Object Oriented Templates, Cloud Computing and Adafruit Cloud

Download full paper PDF format (Page: 5-12)

Lie Symmetry Analysis and the Exact Analytic Solutions of Nonlinear Fourth Order Evolution Equation

Kevin. O. Wambura, M. E. Oduor Okoya, T. J. O. Aminer

School of Mathematics and Actuarial Science, Jaramogi Oginga Odinga University of Science and Technology, P.O Box 210-40601, Bondo, Kenya

Abstract- In this paper, a nonlinear fourth order evolution equation is investigated by the Lie symmetry analysis approach. All the geometric vector fields and the Lie groups of the evolution equation are obtained. Finally, the symmetry reduction and the exact solutions of the equation are obtained by means of power series method.

Keywords- Evolution Equation, Lie Symmetry Analysis, Vector Fields, Lie Brackets, Lie Groups, Symmetry Reduction and Power Series

Download full paper PDF format (Page: 13-19)

Investigation of the Adsorption Potentials of an Organic Adsorbent for Phenol Removal from Aqueous Solution


Department of Chemical Engineering, Enugu State University of Science and Technology, Nigeria

Abstract- Phenol is a prevalent pollutant found in many industrial wastewaters, and it is paid singular attention because of its special features including high toxicity, carcinogenic properties, and vital gathering ability that affects the health of humans and the environment. The current study investigated the removal of phenol from synthetic aqueous solutions using prepared Moringa oleifera seed shell as an adsorbent. The efficiency of phenol removal by Moringa oleifera seed shell was evaluated in a batch system, and different parameters such as initial concentration of phenol (100, 200, 300, 400 and 500 mg/L), contact time (10, 20, 30, 40, 50 and 60 min), and adsorbent dosage (0.2, 0.4, 0.6, 0.8, and 1.0 g) were studied. The results showed that the highest percentage of phenol removal by the ash occurred at 0.8 g dosage, contact time of 40 min, and initial concentration of 500 mg/L giving 87.2% phenol removal. The adsorption process was modeled with Langmuir and Freundlich isotherms and adsorption kinetics (pseudo-first order and pseudo-second order) at controlled temperatures. The results showed that the experimental data fit the Langmuir (R2 = 0.8338) much better than the Freundlich model (R2 = 0.7314). For the analysis of the adsorption kinetics, the results showed that the experimental data fit the pseudo-second order kinetics (R2 = 0.999) much better than the pseudo-first order kinetics (R2 = 0.5042). In general, the results of this study revealed that Moringa oleifera seed shell has suitable potential for use in removing phenol from aqueous solution on operation and practical scales due to its availability and organic in nature.

Keywords- Adsorption, Organic Adsorbent, Phenol, Isotherm and Kinetics

Download full paper PDF format (Page: 20-28)