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2023

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Full-Text Articles in Engineering

Depressurization Characteristics Of Steam-Based Reciprocating Vacuum Pump, Hongling Deng Dec 2023

Depressurization Characteristics Of Steam-Based Reciprocating Vacuum Pump, Hongling Deng

Dissertations

This dissertation introduces a novel vacuum technology that leverages low-pressure saturated steam and cooling-controlled condensation, offering an efficient way to utilize low-grade thermal energy sources like waste heat, steam, or solar energy. At the heart of this technology is a unique duo-chamber vacuum pump system, featuring a reciprocating piston and a heat-conductive wall, designed to generate a vacuum through steam-condensation and cooling processes.

The core of this research lies in developing and validating mechanistic models for the steam-condensation depressurization process, a complex phenomenon involving phase change and transport mechanisms. Prior to this work, these mechanisms were not sufficiently modeled or …


5g New Radio Access And Core Network Slicing For Next-Generation Network Services And Management, Abdullah Ridwan Hossain Dec 2023

5g New Radio Access And Core Network Slicing For Next-Generation Network Services And Management, Abdullah Ridwan Hossain

Dissertations

In recent years, fifth-generation New Radio (5G NR) has attracted much attention owing to its potential in enhancing mobile access networks and enabling better support for heterogeneous services and applications. Network slicing has garnered substantial focus as it promises to offer a higher degree of isolation between subscribers with diverse quality-of-service requirements. Integrating 5G NR technologies, specifically the mmWave waveform and numerology schemes, with network slicing can unlock unparalleled performance so crucial to meeting the demands of high throughput and sub-millisecond latency constraints.

While conceding that optimizing next-generation access network performance is extremely important, it needs to be acknowledged that …


Assessing The Feasibility And Mechanism Of Destructive Removal Of Per- And Polyfluoroalkyl Substances (Pfas) From Water, Kaushik Vinaykumar Londhe Dec 2023

Assessing The Feasibility And Mechanism Of Destructive Removal Of Per- And Polyfluoroalkyl Substances (Pfas) From Water, Kaushik Vinaykumar Londhe

Dissertations

One of the most pertinent challenges faced by the drinking water community is the widespread contamination of per- and polyfluoroalkyl substances (PFAS). These anthropogenic chemicals have been ubiquitously used in everyday products such as carpets, stain repellents, dyes, shampoos, non-stick cookware as well as in aqueous firefighting foams. PFAS are linked with adverse health effects in humans such as thyroid disease, obesity, immunological and reproductive disorders and linked to cancer in adults and low birth weight and developmental defects in infants.

Conventional water treatment technologies have proven to be largely ineffective in PFAS remediation, due to their extreme stability and …


A Study On The Preferred Teleworking Policy By The Private Sector And Its Implication To The Demand On Transport Infrastructure (Case Study: Greater Jakarta Area), Alvinsyah Alvinsyah, Edy Hadian, Wahyu Aji Syahputra Dec 2023

A Study On The Preferred Teleworking Policy By The Private Sector And Its Implication To The Demand On Transport Infrastructure (Case Study: Greater Jakarta Area), Alvinsyah Alvinsyah, Edy Hadian, Wahyu Aji Syahputra

CSID Journal of Infrastructure Development

This study examines the implementation of a teleworking policy with a work-from-home (WFH) scheme from a private company perspective and its implications on the Greater Jakarta’s proposed urban rail network’s carrying capacity. Using descriptive and inferential statistical analyses, a representative percentage of employees capable of working from home was determined. This figure, found to be sixty percent, was then employed in a macro transport model simulation to assess its impact on urban rail network demand. The results of the statistical analysis indicate that sixty percent of the company's workforce can still permitted to work remotely. The model simulation conducted indicates …


A Spatiotemporal Analysis Of Organic Pollutants Contamination In Ciliwung River, Indonesia, Mochamad Adhiraga Pratama, Dorothy Marsha Constantine Dec 2023

A Spatiotemporal Analysis Of Organic Pollutants Contamination In Ciliwung River, Indonesia, Mochamad Adhiraga Pratama, Dorothy Marsha Constantine

CSID Journal of Infrastructure Development

Ciliwung River is one of many rivers on Java Island which is polluted by waste from domestic, commercial/industrial, and agricultural activities. The rapid population growth caused changes in land use. Along with population growth and the development of human activities in various sectors, river pollution became a serious problem for humans. The purpose of this study is to conduct a spatiotemporal analysis of the concentration of pollutant in Ciliwung River and its correlation with the trend of land use changes to determine the factors that dominantly influence river pollution. The analysis was carried out on the parameters of organic pollutants …


Arduino-Based High-Frequency Signal Data Acquisition For Learning Media On Antenna And Wave Propagation Practices, Eko Marpanaji, Masduki Zakarijah, Nikko Aji Bayu Nugraha Dec 2023

Arduino-Based High-Frequency Signal Data Acquisition For Learning Media On Antenna And Wave Propagation Practices, Eko Marpanaji, Masduki Zakarijah, Nikko Aji Bayu Nugraha

Elinvo (Electronics, Informatics, and Vocational Education)

This paper discusses the research results on the development of learning media and the results of the feasibility test for the learning process. This study aims to: (1) obtain the design and prototype of Arduino-based high-frequency signal data acquisition learning media; (2) find out the level of feasibility of learning media that has been made for the learning process of Antenna Practice and Wave Propagation courses. The research model uses Research and Development with the ADDIE development method. The research stages in the ADDIE method are Analyze, Design, Develop, Implement, and Evaluate. The research began with the development of learning …


2023 Scholarly Productivity Report, Missouri University Of Science And Technology Dec 2023

2023 Scholarly Productivity Report, Missouri University Of Science And Technology

Civil, Architectural and Environmental Engineering Scholarly Productivity Reports

No abstract provided.


Optimizing The Design Of An Ant-Shaped Millimetre-Wave Antenna For Broadband Applications: 9 To 100 Ghz, Lanston Pramith Fernandes, Harshitha M Raj, Dr. Manish Varun Yadav, Dr Swati Varun Yadav Dec 2023

Optimizing The Design Of An Ant-Shaped Millimetre-Wave Antenna For Broadband Applications: 9 To 100 Ghz, Lanston Pramith Fernandes, Harshitha M Raj, Dr. Manish Varun Yadav, Dr Swati Varun Yadav

Manipal Journal of Science and Technology

This article introduces a miniaturized antenna for 5G-II band millimetre-wave communication. The antenna’s performance is meticulously examined through comprehensive simulations carried out using CST Microwave Studio, employing an FR-4 substrate with dimensions measuring 10 × 12 × 1.5 mm3. The proposed design exhibits exceptional qualities, featuring an impressive impedance bandwidth of 166%. The operational frequency range of this antenna extends from 9.1 to 100 GHz, featuring a central frequency of 45.45 GHz, positioning it effectively within the 5G-II Band. The antenna consistently maintains polar patterns throughout this spectrum, which guarantees dependable and efficient performance. It showcases a substantial gain of …


An Optimized Brushless Dc Motor Control Scheme For Robotics Applications, Nilabha Das, Lakshman Rao S. Paragond Dr., Balkrushna H. Waghmare Dr. Dec 2023

An Optimized Brushless Dc Motor Control Scheme For Robotics Applications, Nilabha Das, Lakshman Rao S. Paragond Dr., Balkrushna H. Waghmare Dr.

Manipal Journal of Science and Technology

This work aims to develop an integrated control strategy for Brushless Direct Current Motors for a wide range of applications in robotics systems. The controller is suited for both high torque - low speed and high-speed control of the motors. Hardware validation is done by developing a custom BLDC drive system, and the circuit elements are optimized for power efficiency.


Cutting-Edge: Four-Element Lumped Mirror Array Mm-Wave Antenna For 5g Second Band, Satellite, And Defence Microwave Applications, Dr. Manish Varun Yadav, Lanston Pramith Fernandes, Dr Swati Varun Yadav Dec 2023

Cutting-Edge: Four-Element Lumped Mirror Array Mm-Wave Antenna For 5g Second Band, Satellite, And Defence Microwave Applications, Dr. Manish Varun Yadav, Lanston Pramith Fernandes, Dr Swati Varun Yadav

Manipal Journal of Science and Technology

This article presents a Lumped Mirror Array mm-Wave Antenna designed for 5G second band, satellite, and defence Microwave applications. The performance of the Array Antenna has been rigorously validated through extensive simulations conducted using CST Microwave Studio, employing a 160 × 70 × 1.5 mm³ FR-4 substrate. The proposed design incorporates unique features, showcasing an impressive impedance bandwidth of 70.4% and a notable return loss of -35 dBi. Operating within a frequency range of 4.7 to 67.63 GHz, this antenna consistently maintains its polarization patterns across the entire spectrum, ensuring reliable and efficient operation. With a remarkable gain of 3.85 …


Characterization Of Pathogen-Specific Metabolites By Thin-Film Solid Phase Microextraction Analytical Tool, Keerthana S, Gouri Illanad, Chiranjit Ghosh Dr. Dec 2023

Characterization Of Pathogen-Specific Metabolites By Thin-Film Solid Phase Microextraction Analytical Tool, Keerthana S, Gouri Illanad, Chiranjit Ghosh Dr.

Manipal Journal of Science and Technology

Respiratory infection caused by the bacterial species is a leading cause of morbidity and mortality globally, especially in immunocompromised people. All available diagnostic techniques for pneumonia detection are relatively limited due to time-consuming stages, selectivity, and the need for invasive procedures. To overcome the current challenges, we developed an analytical technique, utilizing a carbon mesh-supported thin film solid-phase microextraction (TF-SPME) technique coupled to gas chromatography-mass spectrometry for monitoring of pathogen-specific metabolites from bacterial culture media of E. coli bacterial strain. We exposed the TF-SPME device from the headspace of the culture media of the bacteria and extracted the metabolites during …


Human Genome Analysis And Encryption: A Cloud Prototype Model Using Aws And Aes, Priyanka Kunte, Rachana Shanbhogue, Sanjana S. Nayak, Neelima Bayyapu, Manjunath K N, Neha S. Gandhi Dec 2023

Human Genome Analysis And Encryption: A Cloud Prototype Model Using Aws And Aes, Priyanka Kunte, Rachana Shanbhogue, Sanjana S. Nayak, Neelima Bayyapu, Manjunath K N, Neha S. Gandhi

Manipal Journal of Science and Technology

SecureDNA presents a robust solution for safeguarding genetic data in cloud storage through the implementation of AES-256-CBC encryption. This innovative system, designed with a user-friendly interface, guides users seamlessly through DNA data upload processes, ensuring confidentiality and integrity. Utilizing AWS services such as RDS, VPC, and EC2, SecureDNA establishes a secure infrastructure for data storage and user interaction. By encrypting DNA records before storage and leveraging cloud computing benefits, this system not only protects sensitive genetic information but also offers scalability and accessibility. SecureDNA stands as a pivotal advancement in ensuring the privacy and reliability of genetic data in the …


Comparison Of Dc Motor Speed Calculation Efficiency Between Inductive Proximity Sensor And Rotary Encoder, Dino Dwi Aryanto, S. Sukir Dec 2023

Comparison Of Dc Motor Speed Calculation Efficiency Between Inductive Proximity Sensor And Rotary Encoder, Dino Dwi Aryanto, S. Sukir

Elinvo (Electronics, Informatics, and Vocational Education)

This study examines the level of effectiveness and efficiency of a sensor on the calculation of the rotational speed (RPM) of a DC motor, considering that the calculation of the rotational speed of an electric motor, both AC motors and DC motors, greatly influences the output of the system. the speed of motor rotation is very influential in several fields, such as power generation, which will affect the output voltage that will be generated. There are many methods for measuring the rotational speed of a motor, including using an inductive proximity sensor and a rotary encoder combined with a PLC …


Assessment Of Infrastructure Development Approach In Newly Created Districts In Zambia: Case Study, Chimanga Kabwe, Musonda Innocent, Franco Muleya Dec 2023

Assessment Of Infrastructure Development Approach In Newly Created Districts In Zambia: Case Study, Chimanga Kabwe, Musonda Innocent, Franco Muleya

CSID Journal of Infrastructure Development

This article evaluates the infrastructure development plans in Zambia's newly established districts, primarily focusing on assessing their effectiveness. Infrastructure development encompasses various strategies, and this study investigates the factors influencing the selection of these strategies for implementing infrastructure projects in Zambia. Through structured interviews and questionnaires distributed to 500 respondents, the research highlights the critical role of community involvement. Communities play a pivotal role in identifying essential amenities, setting priorities for infrastructure construction, incorporating their ideas, and participating in the planning process for executing infrastructure projects. The analysis reveals that community members held varying perspectives on the significance of infrastructure …


The Impact Of Adopting Digital Twins In Urban Development, Mohammed Ali Berawi, Perdana Miraj, Mustika Sari Dec 2023

The Impact Of Adopting Digital Twins In Urban Development, Mohammed Ali Berawi, Perdana Miraj, Mustika Sari

CSID Journal of Infrastructure Development

The construction industry, which plays a pivotal role in urban development, has undergone a significant transformation in recent years. This transformation is largely marked by the rise of digitalization, a phenomenon fundamentally altering how we design, construct, and operate our urban environments. At the forefront of this paradigm shift is the notion of Digital Twins (DT), which entails a dynamic and virtual representation of tangible assets. Urban development has witnessed a growing adoption of this innovative approach to improve cities' infrastructure planning, construction, and management. Digital Twin enables real-time simulation and monitoring, enhancing performance and more informed decision-making. Therefore, implementing …


Recommendations On Flood Management At Cengkareng Drain Estuary In Enhancing Estuary Resilience To Compound Hazard, Athena Hastomo, Evi Anggraheni, Adi Prasetyo, Dwita Sutjiningsih Dec 2023

Recommendations On Flood Management At Cengkareng Drain Estuary In Enhancing Estuary Resilience To Compound Hazard, Athena Hastomo, Evi Anggraheni, Adi Prasetyo, Dwita Sutjiningsih

CSID Journal of Infrastructure Development

Jakarta's coastal region, characterized by dense settlements and industrial zones, faces significant flood risks due to land subsidence and rising sea levels, exacerbated by human activities and climate change. This study evaluates the effectiveness of the National Capital Integrated Coastal Development (NCICD) project, which proposes embankments along Jakarta's coast for enhanced flood resilience. Focusing on the Cengkareng Drain estuary, two-dimensional HEC-RAS simulations were employed. This study incorporates various factors such as precipitation, tides, waves, rising sea levels, and land subsidence to model extreme flood scenarios. The analysis reveals key strategies to improve flood management. Firstly, introducing new pumping stations and …


Interacting Action Of Alkali-Silica Reaction And Chloride-Induced Steel Corrosion On The Reinforced Concrete Structures – A Critical Review, Williams Dunu Dec 2023

Interacting Action Of Alkali-Silica Reaction And Chloride-Induced Steel Corrosion On The Reinforced Concrete Structures – A Critical Review, Williams Dunu

CSID Journal of Infrastructure Development

The degradation of reinforced concrete (RC) structures amidst the progression of corrosion within alkali-silica reaction (ASR)-affected structures is a complex phenomenon marked by diverse causal factors and repercussions. While the initiation phase of chloride-induced steel corrosion and ASR in RC structures has received extensive scrutiny, insufficient attention has been dedicated to comprehending the propagation phase (tp). Therefore, this study addresses this gap by centering its focus on the propagation phase, driven by the imperative need to formulate efficient and sustainable maintenance, repair, and management strategies for RC structures grappling with the concurrent impacts of degradation mechanisms such as ASR and …


Impact Analysis Of Land Use Changes On Inundation Map In The Ciliwung River Watershed, Muhammad Raihan Arkan Abiyan Zein, Evi Anggraheni, Dadang Muhamad Yahya Dec 2023

Impact Analysis Of Land Use Changes On Inundation Map In The Ciliwung River Watershed, Muhammad Raihan Arkan Abiyan Zein, Evi Anggraheni, Dadang Muhamad Yahya

CSID Journal of Infrastructure Development

The rapid population growth in Indonesia’s DKI Jakarta Province has escalated the demand for housing, increasing built-up land at the expense of green open spaces, known as Ruang Terbuka Hijau (RTH). This shift has significantly reduced the land available for water infiltration, resulting in increased runoff and flow discharge, particularly in the Ciliwung River Watershed. This research aims to map inundation in the Ciliwung River Watershed, which is attributable to land cover changes from 1990 to 2022. The study examines flood flow discharge and inundation patterns by utilizing HEC-HMS 4.10 for hydrological modeling and HEC-RAS 6.1 for 1D and 2D …


Quantum-Enhanced Disaster Assessment And Management (Quandam) System – A Perspective, Mohammed Sahil Nakhuda, Shweta Vincent Dr., Om Prakash Kumar Dr. Dec 2023

Quantum-Enhanced Disaster Assessment And Management (Quandam) System – A Perspective, Mohammed Sahil Nakhuda, Shweta Vincent Dr., Om Prakash Kumar Dr.

Manipal Journal of Science and Technology

Efficient disaster response hinges on the rapid identification of damaged structures post-natural disasters. This literature review surveys diverse solutions, emphasizing merits, drawbacks, and performance metrics. Techniques such as deep learning with pre-trained models, transfer learning with CNNs, and incremental learning with SVMs are scrutinized for their computational demands and adaptability. Ensemble learning, CNNs, attention-based models, transformer networks, and hybrid approaches offer distinct advantages like heightened accuracy and resource efficiency. Challenges, including computational complexity and cost, accompany these methods. Additionally, we propose a framework termed Quantum-Enhanced Disaster Assessment and Management (QuanDAM) which encompasses the usage of Artificial Intelligence (AI) predictive modelling, …


The Presence Of Memory Through Materiality, Spatial Configuration, And Collective As A System For Sustainable High-Rise Residence, Arnis Rochma Harani, Brigitta E. Mekarwangi, Muhamad I. Hasan Dec 2023

The Presence Of Memory Through Materiality, Spatial Configuration, And Collective As A System For Sustainable High-Rise Residence, Arnis Rochma Harani, Brigitta E. Mekarwangi, Muhamad I. Hasan

CSID Journal of Infrastructure Development

This paper aims to explore the multifaceted elements involved in the design of residential buildings, encompassing both landed and high-rise structures, with a particular focus on memory. The ever-increasing urban population density has prompted a shift towards high-rise living, leading many individuals to transition from traditional landed homes. However, in urban environments where closely-knit communities have been the norm, high-rise living is often perceived as a potential obstacle to fostering social interactions akin to those experienced in landed residential areas. This challenge presents a compelling opportunity for designers to create vertical residential spaces that maintain the vibrant communal ambiance found …


Seasonal Variability On Microplastic Polutions In Water And Sediment Of Ciliwung River, Hefty Clarissa Wilyalodia, Elgrytha Victoria Tybeyuliana, Alloysius Pamurda Dhika Mahendra, Mochamad Adhiraga Pratama, Suphia Rahmawati, Fajri Mulya Iresha, Setyo Sarwanto Moersidik Dec 2023

Seasonal Variability On Microplastic Polutions In Water And Sediment Of Ciliwung River, Hefty Clarissa Wilyalodia, Elgrytha Victoria Tybeyuliana, Alloysius Pamurda Dhika Mahendra, Mochamad Adhiraga Pratama, Suphia Rahmawati, Fajri Mulya Iresha, Setyo Sarwanto Moersidik

CSID Journal of Infrastructure Development

Microplastics, recognized as emerging contaminants, have been detected in numerous rivers globally. This study focuses on the Ciliwung River in Jakarta, examining the influence of seasonal variations—specifically the rainy and dry seasons—on microplastics' concentration, types, and colors. Sampling was conducted during November 2022 (dry season) and March 2023 (wet season) using a plankton net for water (10 liters) and an Ekman grab sampler for sediment (400 mililiters). Microplastic abundance was analyzed following the National Oceanic and Atmospheric Administration (NOAA) adaptation method, and their material characteristics were identified using Fourier Transform Infrared Spectroscopy (FTIR) testing. Results revealed a notable seasonal impact: …


The Effects Of Blue Light From Digital Displays On Visual Fatigue, Victor Taboadela Dec 2023

The Effects Of Blue Light From Digital Displays On Visual Fatigue, Victor Taboadela

Theses

With the ever-increasing viewing time of digital displays, the potential effects of blue light emitted from these displays on eye health and eye fatigue are a real concern. This study presents a literature review of six laboratory studies conducted between 2014 and 2022 on the effect of using filters to attenuate the harmful effects of blue light. The review delves into smartphone and computer screen effects, recent literature reviews on blue light, and potential hazards associated with short-wavelength light. Although the majority of the studies recommended blue light filters, only three of the six laboratory studies (Shi et al. 2021, …


First-Year Engineering Students’ Motivation To Participate In Virtual International Collaborative Experiential Program (Vicep): An Expectancy-Value-Cost Approach, Cedrick Kwuimy, So Yoon Yoon Dec 2023

First-Year Engineering Students’ Motivation To Participate In Virtual International Collaborative Experiential Program (Vicep): An Expectancy-Value-Cost Approach, Cedrick Kwuimy, So Yoon Yoon

Journal of International Engineering Education

Changes in course delivery mechanisms necessitated by the COVID-19 pandemic created an opportunity to develop a Virtual International Collaborative Experiential Program (VICEP) as an alternative to traditional, travel-based study abroad programs. This paper presents the results of an investigation of engineering students’ motivation, perceived challenges, and preferred geographic areas for the VICEP. A sample of 116 first-year engineering students at the University of Cincinnati responded to survey items regarding their perceptions of motivation to participate in the VICEP, including in terms of expectancy, value, and cost, along with open-ended questions. Both male and female students scored the highest on value …


Gen-Acceleration: Pioneering Work For Hardware Accelerator Generation Using Large Language Models, Durga Lakshmi Venkata Deepak Vungarala Dec 2023

Gen-Acceleration: Pioneering Work For Hardware Accelerator Generation Using Large Language Models, Durga Lakshmi Venkata Deepak Vungarala

Theses

Optimizing computational power is critical in the age of data-intensive applications and Artificial Intelligence (AI)/Machine Learning (ML). While facing challenging bottlenecks, conventional Von-Neumann architecture with implementing such huge tasks looks seemingly impossible. Hardware Accelerators are critical in efficiently deploying these technologies and have been vastly explored in edge devices. This study explores a state-of-the-art hardware accelerator; Gemmini is studied; we leveraged the open-sourced tool. Furthermore, we developed a Hardware Accelerator in the study we compared with the Non-Von-Neumann architecture. Gemmini is renowned for efficient matrix multiplication, but configuring it for specific tasks requires manual effort and expertise. We propose implementing …


Analysis Of Marine Zone Management In Disputed Island Territories, Khomsin Khomsin, Danar Guruh Pratomo, Ayu Isnania Zahra Dec 2023

Analysis Of Marine Zone Management In Disputed Island Territories, Khomsin Khomsin, Danar Guruh Pratomo, Ayu Isnania Zahra

Journal of Environmental Science and Sustainable Development

Indonesia has 17,204 islands registered, named, and coordinated by Geospatial Information Agency (BIG). The number of islands can threaten maritime boundary disputes between provinces, districts, and cities. One of the disputes is the claim over Pulau Tujuh, which is mutually contested for ownership by the Province of Bangka Belitung and the Province of Riau Islands. This study aims to analyze the marine management zone of the Pulau Tujuh claim. It is carried out using the cartometric method. This study of regional boundaries refers to the Regulation of The Minister of Home Affairs of The Republic of Indonesia 141 of 2017, …


Borophene And Graphene For Non-Enzymatic Biosensor- Ab-Initio Study, Omar A. Ismail Dec 2023

Borophene And Graphene For Non-Enzymatic Biosensor- Ab-Initio Study, Omar A. Ismail

Theses and Dissertations

Non-enzymatic glucose sensing holds promise to overcome limitations associated with glucose oxidase, such as oxygen dependence and short shelf life. This study explores the potential sensing capabilities of borophene and graphene through direct interaction with various compounds, including β-glucose, uric acid, ascorbic acid, fructose, and acetaminophen. Using Density Functional Theory (DFT), we calculated binding energies and the respective Density of States (DOS) for these adsorbates on both graphene and borophene surfaces. Preliminary results suggest that borophene might exhibit nearly twice the affinity for β-glucose compared to graphene. Moreover, the calculated Density of States reveals distinct distortions in the electronic states …


The Effect Of Walnut Shell Ash On The Properties Of Cement Paste And Mortar: A Study On Partial Replacement Of Cement, Ali Shebli, Jamal Khatib, Adel Elkordi Dec 2023

The Effect Of Walnut Shell Ash On The Properties Of Cement Paste And Mortar: A Study On Partial Replacement Of Cement, Ali Shebli, Jamal Khatib, Adel Elkordi

BAU Journal - Science and Technology

In the pursuit of a more sustainable future, the utilization of agricultural waste in cementitious products has emerged as a popular and effective solution. The current study explores the feasibility of incorporating ash derived from walnut nutshells, considered agro residues, into eco-friendly blended cement paste and mortars to examine its impact on their properties. A range of blended cement mixtures was formulated by incorporating walnut shell ash (WSA) in three varying proportions of 5%, 10%, and 15% relative to the weight of the cement. Tests were conducted to investigate the properties of the blended cement paste and mortar incorporating WSA, …


Towards Digital Twins For Optimizing Metrics In Distributed Storage Systems - A Review, May Itani, Layal Abu Daher, Ahmad Hammoud Dec 2023

Towards Digital Twins For Optimizing Metrics In Distributed Storage Systems - A Review, May Itani, Layal Abu Daher, Ahmad Hammoud

BAU Journal - Science and Technology

With the exponential data growth, there is a crucial need for highly available, scalable, reliable, and cost-effective Distributed Storage Systems (DSSs). To ensure such efficient and fault tolerant systems, replication and erasure coding techniques are typically used in traditional DSSs. However, these systems are prone to failure and require different failure prevention and recovery algorithms. Failure recovery of DSS and data reconstruction techniques take into consideration different performance metrics optimization in the recovery process. In this paper, DSS performance metrics are introduced. Several recent papers related to adopting erasure coding in DSSs are surveyed together with highlighting related performance metrics …


Molybdenum Versus Tungsten Based Polyoxometalates For Highly Effective Methylene Blue Removal, Roula Abi Saad, Ghassan Younes, Mohammad H. El- Dakdouki, Rami Al-Oweini Dec 2023

Molybdenum Versus Tungsten Based Polyoxometalates For Highly Effective Methylene Blue Removal, Roula Abi Saad, Ghassan Younes, Mohammad H. El- Dakdouki, Rami Al-Oweini

BAU Journal - Science and Technology

[SiW12O40]4-(SiW12) and [Mo8O26]4- (Mo8) were synthesized and characterized by Fourier Transform Infrared spectroscopy (FTIR). The prepared polyoxometalates were studied as potential adsorbents for the removal of methylene blue (MB) from an aqueous solution. Various operational parameters—contact time, adsorbent dose, initial dye concentration, pH, and temperature— were meticulously assessed by UV/Vis spectrophotometry to study its impact on the adsorption efficacy. An inverse relationship was observed between the percentage dye removal and the initial dye concentration, highlighting the complexes' superior adsorption capabilities under lower dye loads. The …


The Effect Of Fine Recycled Concrete Aggregates On The Mechanical And Durability Properties Of Concrete, Abbas Chour, Jamal Khatib Dec 2023

The Effect Of Fine Recycled Concrete Aggregates On The Mechanical And Durability Properties Of Concrete, Abbas Chour, Jamal Khatib

BAU Journal - Science and Technology

The fast increase of construction and demolition (C&D) operations has resulted in the creation of massive amounts of garbage, which must be cleared. Reusing C&D waste is of significant importance for environmental conservation and resource utilization. One such alternative for structural concrete is recycled concrete aggregate obtained from building and demolition debris. In this context, the present study aims to comprehensively review the current state of the art in fine recycled concrete materials (fRCA), including their physical properties, technological advantages, mechanical properties, and durability characteristics. The study establishes a paradigm for evaluating the quality of fRCA, whether created in a …