Journal of Engineering最新文献_第2页

Evaluating the Moisture Susceptibility of Asphalt Mixtures Containing Aluminum Dross as a Filler 评估含铝渣作为填料的沥青混合物的湿度敏感性

IF 2.7

Journal of Engineering Pub Date : 2024-01-01 DOI: 10.31026/j.eng.2024.01.12

Sarah K. Ugla, M. Ismael

{"title":"Evaluating the Moisture Susceptibility of Asphalt Mixtures Containing Aluminum Dross as a Filler","authors":"Sarah K. Ugla, M. Ismael","doi":"10.31026/j.eng.2024.01.12","DOIUrl":"https://doi.org/10.31026/j.eng.2024.01.12","url":null,"abstract":"One of the most essential components of asphalt pavements is the filler. It serves two purposes. First, this fine-grained material (diameter less than 0.075 mm) improves the cohesiveness of aggregate with bitumen. Second, produce a dense mixture by filling the voids between the particles. Aluminum dross (AD), which is a by-product of aluminum re-melting, is formed all over the world. This material causes damage to humans and the environment; stockpiling AD in landfills is not the best solution. This research studies the possibility of replacing part of the conventional filler with aluminum dross. Three percent of dross was used, 10, 20, and 30% by filler weight. The MarshallMix design method was adopted to obtain the optimum asphalt content for the selected aggregate gradation. After that, the mixture was used to evaluate the moisture damage for controlandimproved mixtures. The compressive strength and tensile strength tests were used to estimate the moisture damage to the asphalt mixtures. It was observed that replacing a part of the limestone dust filler with aluminum dross would improve moisture damage resistance. This was approved since the maximum increase in tensile strength ratio (TSR)was found to be 13.42% at 20% of AD, and the maximum increase in the index of retained strength (IRS)was found to be 8.73% at the same AD percent.\u0000 ","PeriodicalId":15716,"journal":{"name":"Journal of Engineering","volume":"21 4","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139455247","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improvement Marshall Properties of Hot Mix Asphalt Concrete Using Polyphosphoric Acid 使用多磷酸改善热拌沥青混凝土的马歇尔性能

IF 2.7

Journal of Engineering Pub Date : 2024-01-01 DOI: 10.31026/j.eng.2024.01.08

Marwa Jawad Badr, M. Ismael

{"title":"Improvement Marshall Properties of Hot Mix Asphalt Concrete Using Polyphosphoric Acid","authors":"Marwa Jawad Badr, M. Ismael","doi":"10.31026/j.eng.2024.01.08","DOIUrl":"https://doi.org/10.31026/j.eng.2024.01.08","url":null,"abstract":"Modified asphalt is considered one of the alternatives to address the problems of deficiencies in traditional asphalt concrete, as modified asphalt addresses many of the issues that appear on the pavement layers in asphalt concrete, resulting from heavy traffic and vehicles loaded with loads that exceed the design loads and the large fluctuations in the daily and seasonal temperatures of asphalt concrete. The current study examined the role of polyphosphoric acid (PPA) as a modified material for virgin asphalt when it was added in different proportions (1%, 2%, 3%, 4%) of the asphalt weight. The experimental program includes the volumetric characteristics associated with the Marshall test, the physical properties, and the FTIR spectroscopy examination of virgin asphalt and polyphosphoric acid (PPA) modified asphalt. This study showed that mixtures with modified asphalt using polyphosphoric acid (PPA) by 3% achieved the typical Marshall properties at the optimal asphalt content of 4.8%, recording a 10% decrease in the optimum asphalt content for the mixtures made with virgin (unmodified) asphalt, whose proportion was 4.9% is the optimum asphalt content. PPA is available in the local markets and is considered cheaper than polymers. It is also regarded as economical as it reduces the optimum content of asphalt.","PeriodicalId":15716,"journal":{"name":"Journal of Engineering","volume":"29 8","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139456562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improving the Direction of Arrival Estimation Using the Parasitic Subspace Generated by Active-Parasitic Antenna (APA) Arrays 利用有源寄生天线 (APA) 阵列产生的寄生子空间改进到达方向估计

IF 2.7

Journal of Engineering Pub Date : 2024-01-01 DOI: 10.31026/j.eng.2024.01.11

Rabah Abduljabbar Jasem

{"title":"Improving the Direction of Arrival Estimation Using the Parasitic Subspace Generated by Active-Parasitic Antenna (APA) Arrays","authors":"Rabah Abduljabbar Jasem","doi":"10.31026/j.eng.2024.01.11","DOIUrl":"https://doi.org/10.31026/j.eng.2024.01.11","url":null,"abstract":"The improvement in Direction of Arrival (DOA) estimation when the received signals impinge on Active-Parasitic Antenna (APA) arrays will be studied in this work. An APA array consists of several active antennas; others are parasitic antennas. The responses to the received signals are measured at the loaded terminals of the active element. The terminals of the parasitic element are shorted. The effect of the received signals on the parasites, i.e., the induced short-circuit current, is mutually coupled to the active elements. Eigen decomposition of the covariance matrix of the measurements of the APA array generates a third subspace in addition to the traditional signal and noise subspaces generated by the all-active antenna receiving array. This additional subspace, the parasitic subspace, is accompanied by very small eigenvalues (approaching zero). Hence, a complete orthogonality between this subspace and the column space of the steering matrix of the array can be obtained. As a result, better resolution in estimating the DOA can be achieved. Several simulations in conjunction with the MUSIC algorithm, which have been conducted in this work, depict that the APA array outperforms the all-active antenna array as a direction finder, regardless of the size of the array, the number of active elements, or the number of measurement snapshots. Furthermore, super-resolution DOA estimation can be achieved when a subset of the parasitic subspace is used as if the measurement were noiseless. Also, the APA array contributes to very small RMSE values over a wide range of S/N of the received signals.\u0000 ","PeriodicalId":15716,"journal":{"name":"Journal of Engineering","volume":"9 12","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139457853","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Assessment of Traditional Asphalt Mixture Performance Using Natural Asphalt from Sulfur Springs 使用硫磺泉天然沥青评估传统沥青混合料性能

IF 2.7

Journal of Engineering Pub Date : 2024-01-01 DOI: 10.31026/j.eng.2024.01.04

Fatima A. Mohammed, R. H. Latief, Amjad Hamad Albayati

{"title":"Assessment of Traditional Asphalt Mixture Performance Using Natural Asphalt from Sulfur Springs","authors":"Fatima A. Mohammed, R. H. Latief, Amjad Hamad Albayati","doi":"10.31026/j.eng.2024.01.04","DOIUrl":"https://doi.org/10.31026/j.eng.2024.01.04","url":null,"abstract":"This research utilized natural asphalt (NA) deposits from sulfur springs in western Iraq. Laboratory tests were conducted to evaluate the performance of an asphalt mixture incorporating NA and verify its suitability for local pavement applications. To achieve this, a combination of two types of NA, namely soft SNA and hard HNA, was blended to create a binder known as Type HSNA. The resulting HSNA exhibited a penetration grade that adhered to Iraqi specifications. Various percentages of NA (20%, 40%, 60%, and 80%) were added to petroleum asphalt. The findings revealed enhanced physical properties of HSNA, which also satisfied the requirements outlined in the Iraqi specifications for asphalt cement.\u0000Consequently, HSNA can serve as an asphalt binder to produce asphalt mixtures for flexible paving construction. Notably, HSNA mixtures exhibited greater Marshall stability and stiffness index when compared to traditional mixtures. The results from indirect tensile strength (ITS) and tensile strength ratio (TSR) tests indicated that the 80NA mixture displayed the highest ITS values and a TSR of 81.36%, surpassing the TSR of the mixture incorporating petroleum asphalt by 0.57%.","PeriodicalId":15716,"journal":{"name":"Journal of Engineering","volume":"11 2","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139395088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improving Thermal Performance in the University Classrooms 提高大学教室的热性能

IF 2.7

Journal of Engineering Pub Date : 2024-01-01 DOI: 10.31026/j.eng.2024.01.05

Noor Alhuda Khalil, G. M. I. Kamoona

{"title":"Improving Thermal Performance in the University Classrooms","authors":"Noor Alhuda Khalil, G. M. I. Kamoona","doi":"10.31026/j.eng.2024.01.05","DOIUrl":"https://doi.org/10.31026/j.eng.2024.01.05","url":null,"abstract":"Universities are among spaces where it's important to ensure thermal comfort in indoor spaces, improving the occupants' well-being and productivity. The problem of the research was to study appropriate glazing systems for the spaces of the University of Baghdad because glazing systems are one of the most important elements of the indoor environments, and it has a major impact on the thermal performance of buildings. Glass is one of the most seasoned materials that are most utilized in the design. Since it is a diaphanous material, it allows sunlight to enter the building, increasing the space's temperature, cooling loads, and energy consumption in summer. The research followed the experimental method by studying and testing(conventional, advanced, and photovoltaic glazing)by Revit and Onyx Solar analysis in the Architectural Department classes to find the appropriate type of glazing in the spaces of hot, dry areas. The results showed that advanced glazing is the best by reducing the cooling loads andincreasingthermal performance quality. Photovoltaic glazing showed its efficiency in filling part of the electrical energy needs within the spaces of the Architectural department.","PeriodicalId":15716,"journal":{"name":"Journal of Engineering","volume":"1 3","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139455123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Production and Characterization of Bricks from Bottom Ash and Textile Sludge Using Plastic Waste as Binding Agent 利用塑料废弃物作为粘合剂从底灰和纺织污泥中生产砖块并确定其特性

IF 2.7

Journal of Engineering Pub Date : 2023-12-26 DOI: 10.1155/2023/7607677

Israel Tessema, Zena Fantahun

{"title":"Production and Characterization of Bricks from Bottom Ash and Textile Sludge Using Plastic Waste as Binding Agent","authors":"Israel Tessema, Zena Fantahun","doi":"10.1155/2023/7607677","DOIUrl":"https://doi.org/10.1155/2023/7607677","url":null,"abstract":"The production of traditional clay bricks consumes a large amount of energy and resources and can lead to the depletion of natural resources like clay. On the contrary, the improper disposal of waste materials such as bottom ash, textile sludge, and plastic waste can lead to environmental pollution and health hazards. Bricks and concrete blocks have been widely used in construction, but the continuous exploitation of raw materials can negatively impact the environment. This study aimed to produce bricks made from municipal solid waste, incinerated bottom ash, and textile sludge, using plastic waste as a binder. It assessed the potential use of these bricks as an alternative material for brick block production. The physical and chemical characteristics of the raw materials were determined using standard test methods. The crushed plastic waste was melted and mixed with dried textile sludge and bottom ash in various ratios, including 1 : 1 : 1, 2 : 1 : 1, 1 : 2 : 1, 1 : 1 : 2, and 1 : 2 : 2 for plastic, municipal incinerated bottom ash, and textile sludge, respectively. The mixed sample was then placed into molds until it dried, and the resulting bricks were tested for compressive strength, water absorption, efflorescence, and leachability. The results indicated that the bricks had suitable physical and chemical properties, with compressive strength ranging from 8.527 to 16.4 MPa and water absorption percentages ranging from 1.3 to 3.4%. Slight efflorescence was observed for the 1 : 2 : 2 ratios. The production of traditional clay bricks consumes a large amount of energy and resources and can lead to the depletion of natural resources like clay. On the other hand, the improper disposal of waste materials such as bottom ash, textile sludge, and plastic waste can lead to environmental pollution and health hazards.","PeriodicalId":15716,"journal":{"name":"Journal of Engineering","volume":"2 22","pages":""},"PeriodicalIF":2.7,"publicationDate":"2023-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139156714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fuzzy AHP TOPSIS Methodology for Multicriteria ABC Inventory Classification 多标准 ABC 库存分类的模糊 AHP TOPSIS 方法

IF 2.7

Journal of Engineering Pub Date : 2023-12-22 DOI: 10.1155/2023/7661628

Andrés Mauricio Paredes Rodríguez, Juan José Bravo Bastidas, Juan Carlos Osorio Gómez, Diego León Peña Orozco, Jesús González Feliu

{"title":"Fuzzy AHP TOPSIS Methodology for Multicriteria ABC Inventory Classification","authors":"Andrés Mauricio Paredes Rodríguez, Juan José Bravo Bastidas, Juan Carlos Osorio Gómez, Diego León Peña Orozco, Jesús González Feliu","doi":"10.1155/2023/7661628","DOIUrl":"https://doi.org/10.1155/2023/7661628","url":null,"abstract":"Products’ classification according to their importance has been a topic addressed by academia and industry for many years, mainly due to the great importance of this process to obtain efficient inventory policies that reduce lost sales while reducing inventory maintenance costs. This research has to perform an ABC inventory classification in a medium-sized company that sells hardware goods and construction materials, considering multiple quantitative and qualitative criteria. AHP fuzzy TOPSIS multicriteria tool was used as a methodological approach which implies the definition and initial weighting of a set of relevant criteria for the study based on the AHP fuzzy methodology, to obtain an inventory products’ importance assessment according TOPSIS technique procedure. After applying the technique, it is possible to obtain that 0.26% of the inventory was classified as highly critical. Likewise, 5.45% represents products of medium relevance to the organization. Finally, it is observed that many of the products (approximately 94%) have little or almost no impact within the company under study. This methodology was used in a practical case where some criteria were taken from the reviewed literature. In addition, the criticality criterion was used from a financial perspective.","PeriodicalId":15716,"journal":{"name":"Journal of Engineering","volume":"56 8","pages":""},"PeriodicalIF":2.7,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138946243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Controlled Voltage of Hot Snare Polypectomy Device in Electrosurgical Device 电外科设备中的热卡式息肉切除装置的可控电压

IF 2.7

Journal of Engineering Pub Date : 2023-12-21 DOI: 10.1155/2023/5521294

Saidi O. Olalere, JungHun Choi

{"title":"Controlled Voltage of Hot Snare Polypectomy Device in Electrosurgical Device","authors":"Saidi O. Olalere, JungHun Choi","doi":"10.1155/2023/5521294","DOIUrl":"https://doi.org/10.1155/2023/5521294","url":null,"abstract":"The study aimed to understand the working procedure of the Olympus PSD-30 Electrosurgical Unit, in which a high-frequency alternating current measures the voltage and power output from the unit when used for a surgical operation to determine the extent of tissue damage. In examining this, power and voltage were analyzed using a stopwatch output; then with an Arduino time-based for 1, 2, and 3 seconds to understand the different modes of the cut and coagulation feedback with an RCC circuit used to mimic the human body. This shows a pattern in which the feedback power increases and the voltage decreases as the cut and coagulation mode increases. The percentage between the stopwatch and Arduino is 29% for the 1 and 2 seconds. With this information, Arduino Uno timing was used to experiment with the device for the different power settings for both the cut and coagulation modes from 2 W to 50 W at 5 W intervals. Based on each trial, the signal was measured for a magnitude of 1 Vpp, and the crest factor obtained was 1.5 with a voltage of 1.088 V and 1.0519 V for both the LabView and oscilloscope, respectively, for the electrosurgical unit of 350 kHz. The power control gives 0.4 W, 2.04 W, and 3.01 W for the power peak at 1, 2, and 3 seconds for the 50 W cut mode of the electrosurgical devices.","PeriodicalId":15716,"journal":{"name":"Journal of Engineering","volume":"53 51","pages":""},"PeriodicalIF":2.7,"publicationDate":"2023-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138949569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An Overview of Extensive Analysis of 3D Printing Applications in the Manufacturing Sector 制造业中 3D 打印应用的广泛分析概述

IF 2.7

Journal of Engineering Pub Date : 2023-12-20 DOI: 10.1155/2023/7465737

M. Jayakrishna, M. Vijay, Baseem Khan

{"title":"An Overview of Extensive Analysis of 3D Printing Applications in the Manufacturing Sector","authors":"M. Jayakrishna, M. Vijay, Baseem Khan","doi":"10.1155/2023/7465737","DOIUrl":"https://doi.org/10.1155/2023/7465737","url":null,"abstract":"3D printing (additive manufacturing) is one of the revolutionary technologies that are transforming manufacturing and industrial processes. Additive manufacturing (AM) technology is being used for extensive customization and production of all types of open-source designs in farming, medical, automotive, locomotive, aerospace, and construction industries. The advantages of 3D printing for industrial applications include little material waste, simple production, minimal human participation, minimal postprocessing, and energy efficiency. There are limited articles on the scope and future possibilities of AM technologies. This article explains numerous AM techniques, uses for technology, and substances used in the manufacturing firm. The numerous materials that may be used with every type of 3D printing process are explained in depth. The numerous settings whereby every processor kind is used are also listed in the study. The original study findings indicate that, while 3D printing technology has made great advances, there are still challenges that need to be addressed; however, the obstacles appear to vary: the cost of preprocessing and postprocessing, a restricted selection of materials, and technological constraints are the most significant 3D printing challenges. Readers will be benefitted from the new dimension added by explanation of the many aspects of additive manufacturing and the identification of potential new research fields in this review. The processes may be enhanced and modified to operate with a range of materials through further research, whereas if the range of applications for 3D printing technology components is to be increased, more effort should be made into developing economical printing procedures and supplies that function with these printers.","PeriodicalId":15716,"journal":{"name":"Journal of Engineering","volume":"9 6","pages":""},"PeriodicalIF":2.7,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139170984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Rock Mass Classification Method for Tuff Tunnel Based on the High-Pressure Gas Expansion Method 基于高压气体膨胀法的凝灰岩隧道岩体分类方法

IF 2.7

Journal of Engineering Pub Date : 2023-12-19 DOI: 10.1155/2023/2798187

Huaide Peng, Danli Li, Jia Sheng, Bing Dai, Qi Da

引用次数: 0