PROJECT RISKS DURING THE COVID-19 PANDEMIC AND THEIR EFFECTS ON DELAYS AND COST OVERRUNS
The COVID-19 pandemic has significantly impacted project implementation costs and caused delays across numerous industries. Various analysis found in the literature show that the predominant cause of project delays and higher costs have been people, material, and equipment movement restrictions, supply chain disruptions, and social distancing polic...
By Ilija Stojanović, Marko Selaković, Marija Gačić, Milica Kaplarević, Nenad Filipović
LOAD-CARRYING CAPACITY OF PIVOTED CURVED SLIDER BEARINGS SUBJECT TO SURFACE ROUGHNESS PATTERN AND NON-NEWTONIAN FLUID FLOW BEHAVIOR
The present paper analyzes the Rabinowitsch fluid (RF) behavior on a pivoted curved slider with surface roughness (SR) with the aid of the perturbation technique. In order to account for the random roughness of the bearing surfaces, a stochastic random variable with a nonzero mean, variance, and skewness was taken into consideration. The averaged R...
By Amit Kumar Rahul, Manoj Kumar Singh, Om Namah Sivaya, Saurabh Chandra Maury, Ravi Tiwari, Rohahn Biswas
SIMULATION OF FLUID-STRUCTURE INTERACTION IN AN ARTERY ALTERED BY SEGMENTAL MEDIOLYSIS
Segmental arterial mediolysis (SAM) is an asymptomatic, non-atherosclerotic and non-inflammatory disease of unknown etiology. It affects medium-sized arteries and is characterized by vacuolization and lysis at the level of the media which can lead to dissection, steno-occlusion, or an aneurysm. In this article, a simulation of fluid-structure inter...
By Mouloud Mohellebi, Mohamed Ferrouk, Hocine Tebbiche
EFFECTS OF GAS RADIATION AND ACCELERATED FLOW ON SOLAR HEATER PERFORMANCE
In this paper, the performance enhancement of solar gas heaters is evaluated by taking the advantage of both radiating gas effect and using converged ducts with the accelerated flow. The analyzed solar gas heater includes the glass cover, air gap, absorber, gas channel, bottom plate, and insulation. The inclined position of the bottom plate relativ...
By Seyed Abdolreza Gandjalikha Nassab
FIGURE OF MERIT STUDY FOR VALVELESS PIEZOELECTRIC MICROPUMP DESIGNED TO HANDLE LIQUID AND GAS FLUID IN MEDICAL AND ENVIRONMENTAL APPLICATIONS
Micropumps are revolutionizing compact and autonomous monitoring systems due to their portability and efficiency. In this paper, we present a valveless piezoelectric micropump design. This micropump distributes gas and liquid using a PDMS membrane that moves in response to a force applied by a piezoelectric actuator. The proposed design aims to ach...
By Asma Bouzid, Mohamed El Amine Brixi Negassa, Parastesh Pirastesh, Joel Charrier, Sofiane Soulimane
In this paper, a new design of solar air-water heater for the purpose of performance improvement is introduced for the first time. This thermal system will be a good alternative for both space heating and providing domestic hot water for use in buildings. In the proposed solar collector, the absorbed incoming solar irradiation is transferred into b...
By Seyyed Abdolreza Gandjalikhan Nassab
NUMERICAL STUDY OF MECHANICAL BEHAVIOR OF REPAIRED INCLINED CRACKED UNDER COMPLEX SHEAR-SHEAR LOAD: PERFORMANCE AND DURABILITY OF ALUMINUM 2024-T3 PLATE
In this study, a finite element model was developed to analyze the mechanical behavior of repairing aluminum 2024-T3 structures subjected to complex shear-shear loads using composite patch repair techniques. The study aimed to investigate the effect of different patch sequences on the mechanical behavior of the repaired structure, including the ori...
By Ahmed Allem, Mokadem Salem, Sofiane Talbi, Abderahmane Sahli
NUMERICAL STUDY OF THE EFFECT OF TAPER ANGLES AND TAPER LENGTH ON THE REDUCTION OF AERODYNAMIC DRAG
Aerodynamic drag is still one of the main challenges facing the automotive industry. The design engineers are trying to develop novel techniques that could help to control the flow and optimize the shape of a vehicle to make it able to increase the base pressure drag at the wake region. The pressure drag is one of the main contributors to the aerod...
By Marouane Essahraoui, Rachid El Bouayadi, Mohammed El Ganaoui, Aouatif Saad
RISK CLASSIFICATION FOR SUDDEN CARDIAC DEATH IN PATIENTS WITH HYPERTROPHIC CARDIOMYOPATHY BASED ON MACHINE LEARNING ALGORITHMS
Hypertrophic cardiomyopathy is one of the most prominent cardiovascular diseases, with almost 1 in 500 people suffering from it. It is of great importance for this disease to be detected in a timely manner, so that patients can be provided with an adequate therapy. This is also important for monitoring the future development of the disease so that ...
By Ognjen Pavić, Lazar Dašić, Tijana Geroski, Mina Vasković Jovanović, Nenad Filipović
LINEAR AND NON-LINEAR ANALYSES OF PRESSURE PIPE ELBOWS
The introduction of pressure piping increasingly requires the use of efficient materials which must withstand both high hydrostatic pressures, high mechanical loads and high thermal gradients. At nuclear power plants, piping systems are subjected to high pressures (up to 60 MPa). The occurrence of cracks and their possible spread is one of the seri...
By Benouis Ali, Zahi Rachid, Moulgada Abdelmadjid, Djebbar Noureddine