| S.No. | Article Title & Authors (Volume 16, Issue 6, December - 2023) | Page Nos. | Status |
| 1. | A 3.8–8.4 GHz 0.13 µm CMOS Power Amplifier for Ultra-Wideband Applications Dina M. Ellaithy International Journal of Advances in Engineering & Technology (IJAET), Volume 16 Issue 6, pp. 468-476, December 2023. ABSTRACT Implementation of highly power-efficient transceivers has thus become a crucial research area with the move to wideband technologies. CMOS power amplifiers (PAs) are becoming an essential component of the technology mix for RF front-end devices. However, their properties could be limiting for complete system efficiency. Decreased power dissipation and less area are considered the main design challenges for portable and low-cost devices. Therefore, to increase battery lifetime and reduced cost, a high performance integrated CMOS power amplifier (PA) has been proposed in this paper. Our scheme achieves a power gain of 12.7 dB with better gain flatness of ±0.5 dB over the frequency band beginning from 3.8 GHz to 8.4 GHz, and a power dissipation of 24.8 mW with less area of 0.40 mm2, using 130 nm CMOS technology. |
468-476 | Online |
| 2. | Analytical Solution for a Geometrically and Material Nonlinear 2D Truss Pedro F L Cunha International Journal of Advances in Engineering & Technology (IJAET), Volume 16 Issue 6, pp. 477-488, December 2023. ABSTRACT Structural analyses are increasingly embracing complex approaches to better model real-world behaviours. Within this context, the current study explores nonlinear analyses specifically focused on planar trusses. The research underscores the distinctions and complexities arising from both geometric and material deviations from linear behaviours. This work presents an analytical solution for a material nonlinear 2D truss. The main purpose of this work is provide a robust and precise analytical solution, which encapsulate the intricate nodal behaviour throughout various equilibrium stages. Such solutions cater to a broad spectrum of materials, from those strictly adhering to linear elastic behaviours to others demonstrating more intricate non-linear characteristics. A comprehensive contrast is drawn between the singular effects of geometric non-linearity and the intertwined consequences of both geometric and material non-linearities. This comparative examination shows pronounced differences in the predicted structural responses. An integral component of the research was the comparison of our analytical outcomes with a sophisticated, finite element-based software. These comparisons validate our findings but also position this study as a pivotal reference for future structural analyses. The main conclusion is the significance of incorporating non-linear considerations, both geometric and material-based, in any rigorous structural analyses, ensuring outcomes that align more congruently with real-world observations. |
477-488 | Online |
| 3. | Implementing the Balanced Scorecard in Public Organizations: An Analysis Based on Case Studies Luiz Renato de Souza Justiniano, Daniele Fernandes Rodrigues, Jaqueline Maria de Almeida International Journal of Advances in Engineering & Technology (IJAET), Volume 16 Issue 6, pp. 489-499, December 2023. ABSTRACT In times of financial imbalance in the State and amid the Fiscal Recovery Regime, it is even more urgent to study and develop public management models that allow public institutions to acquire financial management autonomy so that it is possible to promote the efficient use of public resources. This article aims to analyze the implementation of the Balanced Scorecard in public organizations based on case studies that reveal the main contributions of this methodology. The differential of this approach is based on the great challenge of thinking about management within public organizations due to the need to improve organizational performance through the optimization of available resources and the execution of their activities with efficiency, efficacy, and effectiveness. In this sense, the aim is to present a vision of implementing the Balanced Scorecard in public organizations based on a study of Public Management models established on financial efficiency and effectiveness in increasing social well-being (effectiveness). |
489-499 | Online |
| 4. | High Entropy Alloy at High Temperature and Pressure Abdullah Al Masum Jabir, Farjana Jahan International Journal of Advances in Engineering & Technology (IJAET), Volume 16 Issue 6, pp. 500-517, December 2023. ABSTRACT In recent times, high-entropy alloys (HEAs) have gained significant recognition as metallic materials owing to their distinctive design approaches and exceptional mechanical characteristics. HEA consists of five principal elements or more. Due to having more elements, there are four core effects observed in HEA. These four core effects are the driving force for giving unique mechanical properties. So, developing those HEAs in order to applied in the extreme condition becomes a new attraction. Refractory HEAs (RHEAs) are regarded as a novel class of materials that exhibit exceptional mechanical properties at high temperature. These alloys hold significant promise for replacing nickel-based superalloys. We reviewed the history of the HEAs. Main four core effects. The microstructure and phase transition at high pressure. Refractory HEAs microstructure and mechanical properties at high temperature. |
500-517 | Online |
| 5. | Comparative Analysis of Material Properties for Heterostructures Roberto Marani, Anna Gina Perri International Journal of Advances in Engineering & Technology (IJAET), Volume 16 Issue 6, pp. 518-527, December 2023. ABSTRACT In this paper, after a description of the techniques used to realize heterostructures, we present a comparative analysis of the properties of materials used, in order to identify those that best adapt to the different fields of application. At last we present, as an example, a simulation study of a TFET (Tunneling Field Effect Transistor) inverter, whose performances are compared with those of a typical MOS inverter. |
518-527 | Online |
| 6. | Optimizing Mechanical and Corrosion Properties of UNS S41003 Stainless Steel through Austenitizing, Quenching and Tempering Monica dos Santos, Silvana Carreiro de Oliveira, Elivelton Alves Ferreira and Glaucio Soares da Fonseca International Journal of Advances in Engineering & Technology (IJAET), Volume 16 Issue 6, pp. 528-538, December 2023. ABSTRACT UNS S41003 (410D), ferritic stainless steel, demonstrates exceptional resistance to corrosive and abrasive environments, in addition to high mechanical strength and good weldability, making it an appealing option for structural applications. Heat treatments, which include austenitizing, quenching, and tempering, play a crucial role in enhancing its mechanical and chemical properties. These treatments influence the microstructure and impact hardness and corrosion resistance. However, a knowledge gap exists in the literature regarding the specific behaviour of UNS S41003 subjected to these treatments. This study aims to address this gap by investigating the impact of austenitizing, quenching, and tempering at various temperature ranges. Hardness measurements were taken at each stage of treatment, and electrochemical tests were conducted. Energy-dispersive spectroscopy (EDS) analysis was performed to assess chromium distribution. The results revealed an optimal condition: austenitizing at 1050°C for 30 minutes, followed by quenching, which exhibited superior hardness and corrosion resistance. Notably, the chromium distribution in this sample showed more uniformity within the matrix compared to others. By filling this research gap, this study contributes to a better understanding of the mechanical and corrosion properties of UNS S41003 steel under different heat treatment conditions, offering valuable insights for engineering applications. |
528-538 | Online |
| 7. | Historical Perspective on the Use of Wooden Roof With a View to the Revision of NBR 7190 Bruno Henrique Lourenco Camargos, Jaqueline Aparecida Melo & Lucca Araujo Campos International Journal of Advances in Engineering & Technology (IJAET), Volume 16 Issue 6, pp. 539-554, December 2023. ABSTRACT Wood, one of the world's oldest and most widely used construction materials, has continuously evolved to enhance safety in civil engineering. This evolution began with the introduction of NBR 7190, Brazil's inaugural technical standard for timber structure designs in 1982, followed by significant updates in 1997 and 2022. This study conducts a comparative analysis of the design criteria for a Maçaranduba roof truss under the 1997 and 2022 versions of NBR 7190. Focused on a traditional wooden roof design for large buildings in Divinópolis/MG, Brazil, the study thoroughly examines the structural framework, yielding vital parameters for evaluating structural integrity under both NBR 7190 versions. Notably, the latest iteration, NBR 7190-1 (ABNT, 2022), adopts a more conservative approach, ensuring greater safety margins, even when employing larger cross-sections to meet compliance requirements. This research's primary contribution lies in its practical insights, emphasizing the heightened rigor of NBR 7190-1 (ABNT, 2022) in terms of wood property characterization and safety considerations, especially for components subjected to compression and flexo-compression stresses. |
539-554 | Online |
| 8. | Modeling, Analysis and Structural Design of a Multi-story Reinforced Concrete House Using Eberick Software Gustavo Henrique Norat Pintor, Douglas Mateus de Lima, Ialysson da Silva Medeiros International Journal of Advances in Engineering & Technology (IJAET), Volume 16 Issue 6, pp. 555-571, December 2023. ABSTRACT TDespite the existence of multiple structural systems, reinforced concrete dominates Brazilian construction, specifically in the northeast region. This can be attributed to the availability of skilled labor, local materials and resources, as well as its versatility, adaptability, and durability, making it a more cost-effective choice compared to steel structures, which demand specialized skills and higher expenses. In this context, this study addresses the structural design of a multi-story reinforced concrete house, aiming at both technical and professional growth and the advancement of safe and efficient practices and methodologies. The step-by-step process of dimensioning using AltoQI’s Eberick software was presented with careful adherence to all applicable standards. The study encompasses the design and analysis of beams, columns, slabs, and footings carried out in Eberick, as well as the detailing of reinforcements and solutions to identified structural problems. The outcomes of this project contribute to the professional field by providing insights into the capabilities of using the Eberick software. |
555-571 | Online |
| 9. | Global Perspectives on Municipal Solid Waste Disposal and Circular Economy: A Review Gardenia Mendes de Assuncao, Doralice Chagas Tavares, Ronney Arismel Mancebo Boloy International Journal of Advances in Engineering & Technology (IJAET), Volume 16 Issue 6, pp. 572-592, December 2023. ABSTRACT This research presents a review of the study trends on the disposal and utilization of solid wastes from a global perspective to identify the advances in technologies of utilization, recovery, and end use and how this topic has evolved toward the circular economy. The methodology used is the systematic review applying the PRISMA method and bibliometric analysis. The selected database is the Scopus. The bibliometric analysis was performed to identify the main countries, co-authored countries, keywords of the co-occurrence author, and research timeline. The analysis showed that China, Italy, the United Kingdom, and India have the largest publications. The countries with the highest number of partnerships are Italy, the United Kingdom, and China. The author's keywords, the most cited, were "municipal solid waste", “waste management”, “circular economy”, “recycling”, “urban waste”, “anaerobic digestion”, “landfill”, “life cycle assessment”, “incineration”, “waste-to-energy”, and “biogas”. The results indicate an interdisciplinary area and studies that aim to identify and propose solutions to the waste issue, including the incentive to recycle household waste, recovery of energy from landfills, and advanced systems. |
572-592 | Online |
| 10. | Large Excavations in Urban Perimeter: Study of Displacements in Neighboring Foundations Allan Alexandre Honorio, Vitor Pereira Faro International Journal of Advances in Engineering & Technology (IJAET), Volume 16 Issue 6, pp. 593-607, December 2023. ABSTRACT This article aims to numerically analyze the influence of excavations on the surface settlements of neighboring building foundations using the Plaxis 3D finite element software. This is a topic of great interest in urban areas with a high concentration of buildings. The need for increasingly deeper excavations has challenged geotechnical engineers to balance high horizontal pressures while minimizing soil displacements and avoiding damage to nearby structures. In this article, a detailed analysis of the main empirical methods available in the literature for predicting settlement profiles caused by excavations is presented, comparing them with results obtained through finite element software. The study results showed that the empirical method proposed by Hsieh and Ou (1998) provided the best approximation in predicting settlement profiles in the analyzed cases, both for maximum settlement and for the profile of surface settlements with respect to the distance from the excavation face. The method proposed by Ciria (2003), which indicates settlement values during the installation phase of the retaining structure before excavation, also demonstrated a good correlation with the data obtained from the software. Finally, the application of numerical modeling to the selected cases confirmed the observations highlighted by different authors, demonstrating its ability to satisfactorily reproduce horizontal wall displacements and provide an approximate prediction of surface settlements. These findings contribute to a better understanding of the effects of neighboring excavations on foundations and can assist geotechnical engineers in decision-making during the planning and execution of excavation projects in densely built urban areas. |
593-607 | Online |
| 11. | Optimization of Cables in a Solar Power Plant using Genetic Algorithms Eluan Oliveira Nascimento, Paulo Roberto Duailibe Monteiro, Thiago Trezza Borges International Journal of Advances in Engineering & Technology (IJAET), Volume 16 Issue 6, pp. 608-625, December 2023. ABSTRACT The design of a photovoltaic solar plant installed in consists of sizing the equipment, protection components, defining the best arrangement of these components within the available area as it directly affects the length of conductors used. Defining the best placement to allocate the electrical components configures a optimization problem with combinations, due the several number of possible design in the solar power plant. Thus, this article proposes an analysis of two forms of execution of solar projects presenting the electrical losses in cabling and using the genetic algorithm implemented in the Evolutionary Mode of the spreadsheet system on Excel to find the best arrangement of the components, later performing a comparison between the electrical losses of each layout. The results show that the positioning found by the genetic algorithm was able to reduce the electrical losses of the solar system by 60%, this new proposed arrangement was able to increase 6MWh year of generated electrical energy, showing that the most efficient solution is to allocate the components of the system at the central point in relation to the modules displaced in relation to the free area between panel and meter, since the area is occupied with the panels fixed to the ground. |
608-625 | Online |
| 12. | Jambolan Liquor Production: Infusion and Clarification Influence Marcela Franca Liborio, Elaine Santos Silva, Jessica Lima de Souza, Hugo Neves Brandao, Andrea Limoeiro Carvalho, Tais Silva de Oliveira Brandao International Journal of Advances in Engineering & Technology (IJAET), Volume 16 Issue 6, pp. 626-638, December 2023. ABSTRACT Liqueurs are obtained by the infusion or maceration of the vegetable in alcoholic solvent when its flavour compounds are extracted, as well as those that cause turbidity, a quality problem for this beverage. In this context, clarification is considered a necessary step to improve clarity and add value to the liquor. In this work, the influence of the maceration was evaluated, using or not a previous thermal treatment on the fruit, different maceration and aging times, and different ways of clarifying the jambolan liquor. The clarification methods chosen were sedimentation, with and without the clarification agent bentonite, followed by cotton sieving and vacuum filtration. Physicochemical evaluations demonstrated that the pH value, total phenolic compounds and gallic acid concentrations varied during maceration, with a reduction in the pH value and an increase in the total phenolic and gallic acid concentrations. There was also a predominance of the yellow colour of the liquor, regardless the heat treatment of the fruits. The total soluble solids and titratable acidity parameters did not change, regardless the clarification method used. However, it was observed that the clarification method that used bentonite produced a jambolan liqueur with the lowest turbidity and highest tone, being the clearest obtained. |
626-638 | Online |
| 13. | NiCrSiBC Alloy Processed by SPS Escarlet Batista da Silva, Lioudmila Aleksandrovna Matlakhova, Marcia Giardinieri de Azevedo, Barbara Ferreira de Oliveira, Luciano Jose de Oliveira International Journal of Advances in Engineering & Technology (IJAET), Volume 16 Issue 6, pp. 639-645, December 2023. ABSTRACT Nickel superalloys of the Ni-Cr-Si-B-C system, known as the Colmonoy family, stand out for their high wear and corrosion resistance at high temperatures. These alloys are typically deposited onto stainless steel substrates for use as coating. Typically, deposition occurs by welding processes such as PTA (Plasma Transferred Arc) and Laser Cladding. The main objective of this work was to study the effectiveness of Spark Plasma Sintering in the processing of the Colmonoy-5 alloy. In the processing of samples, Colmonoy- 5 alloy powders were used, with average granulometry in the range of 44 to 105 µm. For the SPS sintering of the Colmonoy-5 alloy, the following parameters were used: pressure of 50 MPa, temperature of 900º C and sintering time of 15 minutes. The density of the sintered alloy was determined by the Archimedes method. Vickers hardness measurements were made, with load of 10 N. The structural characterization of the sintered alloy included microstructural analysis, performed by scanning electron microscopy (SEM), and phase composition analysis, where the present phases were identified by X-ray diffraction (XRD). The SPS sintering of Colmonoy-5 alloy powders was effective, achieving alloy densification above 90%. |
639-645 | Online |
| 14. | Modeling of Protection and Shading Devices for Naturally Ventilated Industrial Buildings Bruno Henrique Lourenco Camargos, Thalita Cardoso Dias, Raquel Diniz Oliveira International Journal of Advances in Engineering & Technology (IJAET), Volume 16 Issue 6, pp. 646-658, December 2023. ABSTRACT When considering natural ventilation and upper openings designed for hot air release, it's observed that airflow naturally ascends due to geometric factors. This phenomenon, known as the chimney effect, allows hot air to exit the building without the need for mechanical ventilation intervention. Some authors have empirically determined that the installation of industrial venetian blinds can lead to a loss in internal airflow efficiency of up to 70%, primarily due to the presence of the ridge vent. However, in this study, the raised hypothesis regarding the influence of these devices on airflow through the openings and internal temperature could not be confirmed. Neither the modeling with shading elements nor the detailed technical characterization using the Shade object yielded the expected results. Further validation of the findings is advised through the utilization of dependable technical data from industrial venetian blind manufacturers, comparing it with experimental results. |
646-658 | Online | 15. | Interaction of Commercial Superplastificant Additives with Pozolanic Cements Containing Calcined Clay Amanda Rosa Teixeira, Gabriel Ferreira da Silva Brito, Andreia de Paula, Fabricio Machado, Joao Henrique da Silva Rego International Journal of Advances in Engineering & Technology (IJAET), Volume 16 Issue 6, pp. 659-672, December 2023. ABSTRACT The utilization of polycarboxylate-based superplasticizer additives (PCE) in the concrete industry is widespread, and therefore, the dispersion mechanisms of these additives in cements containing supplementary cementitious materials (SCMs) present significant opportunities for investigation. This article aims to characterize the interaction between three commercial PCEs and three types of cement (pure Portland cement CPV-ARI and cement formulations containing 20 wt% and 28 wt% calcined clay content). The cement and calcined clay underwent physical-chemical characterization, whereas the PCEs were characterized through solid content determination and FTIR analysis. The interaction between cement, SCMs and additive was assessed by determining the optimal additive dosage using the mini-slump test, which was employed to evaluate its influence on kinetic mechanisms and hydration using a semi-adiabatic calorimeter, as well as mechanical strength. The PCEs exhibited high sensitivity to calcined clay, requiring higher dosages of PCEs to achieve the same fluidity compared to the system without clay. |
659-672 | Online |
| 16. | Concentration Levels of Lubricating Oils on Concrete Floors in an Industrial Learning Environment and Subsequent Soil Contamination Vitor Lorival Kudlanvec Junior International Journal of Advances in Engineering & Technology (IJAET), Volume 16 Issue 6, pp. 673-678, December 2023. ABSTRACT The aim of this study was to investigate the behaviour of hydrocarbon pollutants on industrial floors lacking waterproofing protection and to understand the implications of these pollutants on soil contamination. Industrial floors are frequently exposed to various contaminants, such as oils and greases from diverse sources. In this investigation, a metalworking laboratory that had been operational for 42 years underwent the application of polyurethane-based paint on its concrete floor, resulting in the appearance of oil bubbles on the painted surface. Consequently, the primary objective of this research was to assess the degree of hydrocarbon contamination on the floor to comprehend the encountered issue. The conducted test, following the SM 5520E standard for hydrocarbon detection, revealed that in areas prone to pathological manifestations, the concentration of hydrocarbons increased by 74%, 45%, and 14% with each layer of protected concrete, compared to the equivalent layer in the control region. Furthermore, there was a notable concentration of hydrocarbons in the soil beneath the floor, registering a 51% increase compared to the control region and a substantial 91% increase compared to the adjacent concrete region. |
673-678 | Online |
| 17. | The Impact of Changes in Operational Parameters on Nitrogen Addition During the Formation of Thin Films of TiCN Gaudencio, C.B.; Monezi, C.A.; Massi, M.; Lima, C.R.C.; Grigorov, K.G. International Journal of Advances in Engineering & Technology (IJAET), Volume 16 Issue 6, pp. 679-687, December 2023. ABSTRACT This paper presents the influence of changing operational parameters during the process of adding nitrogen to create TiCN films. These films are deposited onto steel substrates using DCMS and RFMS Magnetron Sputtering sources. The TiC and TiCN compositions are made by combining Ti and C targets with N2 and Ar fluxes. The composition, microstructure, and thickness of the different conditions were analyzed using X-Ray Diffraction, Scanning Electron Microscopy, Raman Spectroscopy, and Profilometry. The results demonstrated that homogeneous TiC thin films were produced, with thicknesses ranging from 120 to 570 nm. Additionally, TiCN films were produced, with thicknesses varying from 120 to 140 nm. Moreover, all films exhibited a uniform distribution of elements on the surface of the substrate. |
679-687 | Online |
| 18. | Analysis of the Influence of Carbonate Additions on the Strength of Magnesium Oxide Composite Arthur F. C. Ribeiro, Kalita C. Araujo, Antonio P. Peruzzi, Carlos E. M. Gomes International Journal of Advances in Engineering & Technology (IJAET), Volume 16 Issue 6, pp. 688-698, December 2023. ABSTRACT This article deals with the study of a composite based on Magnesium Oxide (MgO) as a way to obtain a material that represents lower CO2 emissions in its production compared to Portland cement or gypsum. The MOS composite was used, and various proportions of carbonate material (limestone powder) were incorporated to improve its properties and reduce the final product cost, enabling its application in civil construction. Samples containing only MgO and MgSO4 (without limestone powder), referred to as 'Reference' (REF), were melted. Subsequently, 15%, 25%, 35%, and 45% of carbonate material were incorporated by mass, resulting in samples labeled as 'CALC15', 'CALC25', 'CALC35', and 'CALC45', respectively. After the wet curing process, the prismatic samples were tested for flexural strength and compressive strength. The expandability test was conducted using the Le Chatelier Apparatus. The results indicated that the incorporation of limestone powder proved to be beneficial in terms of strength gain for both flexural and compressive tests. To optimize both flexural and compressive strength, the best outcome was observed in the sample with 35% limestone powder incorporation (CALC35). |
688-698 | Online | 19. | Acoustic Performance of Panels Produced with Butia Fruit Residues Jobim, Silvie Janis Mossate, Danieli Maehler Nejeliski; Duarte, Lauren da Cunha; Mareze, Paulo Henrique International Journal of Advances in Engineering & Technology (IJAET), Volume 16 Issue 6, pp. 699-708, December 2023. ABSTRACT The butiazal is an ecosystem in South America and is on the verge of extinction. The use of fruits (butia) and other parts of plants is an alternative to generating income for farmers and a way of preserving butiazais. The fruits are used in the production of delicacies such as jellies, juices and liqueurs. To do this, the fruits go through a pulping process where the skins and fibers are transformed into waste. The use of this waste is an opportunity to develop by-products with added value and sustainable use, which enables territorial appreciation and local identity. For this, acoustic panels were produced and its potential for sound absorption was analyzed using an impedance tube. The results were close to or better than the performance of panels produced with synthetic materials. Panel samples with a thickness of 30 mm achieved the best performance in relation to acoustic absorption, when compared to those with a thickness of 25 mm, except for frequencies of 2000 Hz and 3000 Hz, where the 25 mm butia sample was superior. |
699-708 | Online |