Digital Commons Network^™

Synthesis Of Graphene Using Carbonaceous Materials In An Ultrasonic Reactor, Paul Chukwuma Ani

Doctoral Dissertations

The synthesis of high-quality graphene from sustainable carbonaceous feedstocks offers an avenue to reduce the environmental and economic costs associated with conventional graphite-based production. This research investigates the co-utilization of biochar and graphite as precursors for graphene fabrication in an ultrasonic reactor. Biochar was produced from biomass via downdraft gasification at 850 °C, yielding a high fixed-carbon, partially graphitized material with favorable surface area and porosity. Graphite, selected for its crystalline structure, was investigated with biochar to assess the influence of precursor composition on exfoliation efficiency, layer thickness distribution, and defect density. Ultrasonic-assisted liquid-phase exfoliation was employed, with process parameters …

Radio Frequency Wave Propagation Modeling Within Obstructed Underground Mining Environments For Effective Miner Localization During Mine Emergencies, Emmanuel Atta Antwi

Doctoral Dissertations

The reliability of underground wireless communication systems remains a significant challenge, particularly during emergencies when the mine environment becomes severely obstructed by debris, dust, and humidity. These environmental and geometric conditions result in significant attenuation of electromagnetic (EM) waves and multipath effects that undermine miner localization and rescue operations. Existing Vector Parabolic Equation (VPE) models are efficient for straight or mildly curved tunnels but fail to account for the random and obstructive conditions typically encountered during underground emergencies. This research develops a novel radio propagation model for EM wave behavior in underground mine drifts under geometrically obstructed conditions. The model …

The Relationship Between Nutrition Knowledge And Dietary Behavior Of Student-Athletes, Kerry A. Smith, Kathleen Fritch, James Rost, Amy Jo Riggs, Juliann Sergi Mcbrayer, Monika Krah

Georgia Educational Researcher

The purpose of this study was to examine the relationship between nutrition knowledge and dietary behavior while controlling for academic major, year, and gender among Division III student-athletes. Sufficient nutrition is essential for athletic performance, injury reduction, and overall health. However, student-athletes face unique challenges that can disrupt optimal nutrition, including poor nutrition knowledge and access to available resources. While several studies have examined the relationship between nutrition knowledge and dietary behavior, no known studies have addressed this among Division III student-athletes. This non-experimental correlational study examined dietary behavior using the Rapid Eating and Activity Assessment for Participants (REAP-S) and …

Emcreg-International Multidisciplinary Consensus Panel On Management Of Hyperkalemia In Chronic Kidney Disease And Heart Failure, Natalie Kreitzer, Nancy M. Albert, Alpesh N. Amin, Craig J. Beavers, Richard C. Becker, Gregg Fonarow, W. Brian Gibler, Katherine W. Kwon, Robert J. Mentz, Biff F. Palmer, Charles V. Pollack, Iliana L. Piña

Division of Cardiology Faculty Papers

BACKGROUND: Hyperkalemia, generally defined as serum potassium levels greater than 5.0 mEq/L, poses significant clinical risks, including cardiac toxicity and muscle weakness. Its prevalence and severity increase in patients with chronic kidney disease (CKD), diabetes mellitus, and heart failure (HF), particularly when compounded by medications like angiotensin converting inhibitors, angiotensin receptor blockers, and potassium sparing diuretics. Hyperkalemia arises from disruptions in potassium regulation involving intake, excretion, and intracellular-extracellular distribution. In CKD and acute kidney injury, these regulatory mechanisms are impaired, leading to heightened risk. The management of chronic hyperkalemia presents a challenge due to the necessity of balancing effective cardiovascular …

New Vs. Reprocessed: A Scoping Review On Ilizarov Frame Reuse, James Hughes, Nicholas Obias, Dustin Prins, Amanda Killeen

School of Podiatric Medicine - Student Research

This review examines current literature regarding the viability of reused/reprocessed Ilizarov External Fixation (IEF) – with the end-goal of improving surgical options for complex limb pathologies in austere environments. We hypothesize this review will find no statistically significant difference between clinical outcomes of reused vs. new IEFs

IEF is an important but costly modality for complex limb pathologies, such as trauma, deformity, and nonunion (Chironga et al., 2023). Though effective, the cost of IEF is exacerbated by its single-use deployment (Chironga et al., 2023). A proposed cost-control measure is IEF reuse/reprocessing via (1) antiseptic pre-treatment, (2) structural stability assessment, (3) …

Complementary Pre-Lateral Mergers Across Ethnicities And Generations In Georgia, Margaret E. L. Renwick, Jon Forrest, Joseph A. Stanley, Lelia Glass

Faculty Publications

No abstract provided.

Types Of Eu Law, European Commission

Documents

No abstract provided.

Do Food Planner Apps Enhance Responsible Food Consumption? The Impact Of Perceptual Antecedents And Moderating Effects On Usage Intention, Rajat Subhra Chatterjee, Irfan Hameed, Ranjan Chaudhuri, Demetris Vrontis, Sumana Chaudhuri, Sheshadri Chatterjee

Plymouth Business School

Purpose: A food planner app helps users to create meal plans and recipes to their preferences, dietary requirements and lifestyle needs. Many food planner apps also could assist with grocery lists, calorie tracking, food waste management and reminders to users. But there is less adoption of such apps. Limited studies examine reasons for non-adaptability, emphasizing the need for more research. This research addresses this gap by observing the effect of pertinent factors such as expectant outcome and openness to change on the extended technology acceptance model. Design/methodology/approach: Drawing on theories and extant literature, a theoretical model was developed. The model …

The Impact Of Port Sector Reforms On The Productivity And Efficiency Of Container Ports In Lower-Middle-Income Countries: A Malmquist Productivity Index Approach, Caleb Danladi, Sarah Tuck, Panagiotis Tziogkidis, Lijun Tang, Chukwuneke Okorie

Plymouth Business School

Despite the extensive research on container port efficiency, the impact of port organizational reforms on productivity and efficiency in lower-middle-income countries remains underexplored, with most studies focusing on developed nations or specific regions. This study addresses this gap. It aims to analyse the productivity changes in container ports within world-wide lower-middle-income countries. The Malmquist Productivity Index, estimated using data envelopment analysis (DEA), was applied to a balanced panel of 39 container ports from 2001 to 2012 being a period that covers substantial port organisational reforms in the target population. The findings reveal an average productivity growth rate of 1.9% among …

Thinking Artfully With Matter: A Posthuman Enquiry Into The Pedagogical Values Of Sketch-Booking., Melanie Potier

School of Law, Humanities and Social Sciences Theses

Becoming attentive to art practices in terms of what they can do rather than what they are, the writing generates a more tentative-artful engagement with how sketchbooking processes engender more response-able relationship with the world. Exploring the relation between sensation and thought, this exemplification of the speculative potential of force and form, emerges as a powerful resistance to the constraints of the neoliberal education system. Practicing art as immanent doing, Erin Manning’s theory of incipient movement works to develop concepts, such as research-creation, event-time, artfulness and thought in motion, which find expression through the mundanities and ordinary occurrence of the …

Transient Lives: Trans & Non-Binary People’S Encounters With The Harms Of Work, Siggi Auerbach

School of Law, Humanities and Social Sciences Theses

This ethnographic criminological research aimed to address several theoretical gaps in the existing literature surrounding trans people, vulnerability, and victimisation. The overarching objective of this study was to offer a revised account of the harms trans people encounter in relation to their work via a new theoretical framework which is informed by ultra-realist criminology, critical hate studies. The theoretical framework was informed by contemporary criminologies of the harms of work, as opposed to the harms the institution of work is argued to inflict upon intersectional aspects of the individual’s social identity. This thesis aimed to reconceptualise the harms trans workers …

The Idealised And The Profane Nun: The Image Of The Nun At The Fin-De-Siècle And Into The 1930s., Shannon Lewis

School of Law, Humanities and Social Sciences Theses

This thesis examines the representation of nuns from the Fin-de-Siècle into the 1930s, in the popular medium of postcards, in art during the Modernist period, and throughout the early development of film. The thesis demonstrates how secularisation, rapid technological development, and political discourse during the selected era impacted the image of the nun. The images selected will be reviewed in the light of Christian iconography, highlighting how the nun is represented and understood as a cultural construct, rather than the reality of the nun. Imagery of nuns from this era seems to fall into two categories of idealisation and/or profanation …

Cfd Analysis Of Hydrodynamic Cavitation Through An Orifice: Influence Of Different Inlet Pressures And Number Of Orifice Holes, Lemthong Chanphavong, Vongsavanh Chanthaboune, Keophousone Phonhalath

ASEAN Journal on Science and Technology for Development

Hydrodynamic cavitation (HC) is considered an energy-efficient process with high potential for utilization in many chemical processes. This study presents a computational fluid dynamics (CFD) analysis of cavitating flow through an orifice with a constant flow area. The Reynolds-Averaged Navier-Stokes (RANS) equations, coupled with turbulence and cavitation models, are employed to capture the complex flow behaviors. The effects of inlet pressures and number of orifice-holes on cavitation behavior are investigated. Result of the numerical simulation is validated with the existing experimental data from the literature. The CFD study revealed that cavitation initiates just behind the inlet edge of the orifice …

Engineering Geological And Groundwater Mapping Of Negara Brunei Darussalam For Urban Planning, Nur Thaqifah Junaidi, Siti Lieyana Azffri, Afiq Aiman Jaya, Muhammad Asri Akmal Suhip, Stefan Herwig Gödeke

ASEAN Journal on Science and Technology for Development

Engineering geology and Hydrogeology play a crucial role in the development of urban areas. Without a thorough geological and hydrogeological understanding, urban development can be risky and prone to numerous challenges. In this study, we aim to conduct engineering geological and groundwater mapping of Brunei utilizing data from 614 sacrificial investigative boreholes drilled over the course of 40 years for geotechnical investigation and housing development. Borehole parameters such as soil data, SPT N-values, depth to groundwater and surface elevation were gathered and evaluated. Soil investigation in the study area revealed predominantly clayey sediments with SPT N-values ranging from 0 to …

Effect Of Build Orientation On Tensile Properties And Fractography Of Additive Manufactured Inconel 718 Alloy, Ajay Kumar Maurya, Amit Kumar, Swarnambuj Suman

ASEAN Journal on Science and Technology for Development

The additive manufacturing (AM) technique “Direct Metal Laser Sintering (DMLS)” is used to create 3D objects directly from 3D design data. A lightweight and complexity-free part without any expensive tooling can be fabricated easily using this method, but it is still challenging to achieve the desired mechanical strength from AM parts, as the mechanical properties of AM-produced parts vary with orientation, scan strategy, and process parameters. Inconel 718 alloy is most commonly utilized in the aerospace and automotive industries, because of its high resistance to corrosion and excellent mechanical qualities. This work presents a study to investigate the orientation-based mechanical …

Distance Metric Learning Techniques For The Performance Improvement Of Ml-Knn And Ranking-Svm-Based Multi-Label Pattern Classification, Shajee Mohan B. S., Sneha S Mohan

ASEAN Journal on Science and Technology for Development

A multi-label pattern classification system tries to predict the set of class labels of a test example by learning from the training examples with the relevant label sets. Classification that involve datasets having multiple labels found immense of applications in pattern analysis tasks involving image, music and video. A test sample can be labeled to indicate different objects, people, music categories or concepts. Classification problems involving data having multiple labels, have to consider training dataset associated with variety of labels. Multi-label extensions of popular algorithms, kNN and Support Vector Machine (SVM) called Multi-label kNN (ML-kNN) and Ranking-SVM are commonly used …

Neuro-Symbolic Ai: A Future Of Tomorrow, Pankaj Chandre, Parikshit Mahalle, Gitanjali Shinde, Bhagyashree Shendkar, Shraddha Kashid

ASEAN Journal on Science and Technology for Development

Neuro-Symbolic AI: A Future of Tomorrow" explores the convergence of neural learning and symbolic reasoning to advance artificial intelligence (AI) systems. Symbolic reasoning makes use of knowledge representation techniques and rule-based systems, whereas neural learning analyzes data using deep learning models. AI becomes more adept at fusing data-driven insights with deductive reasoning when these methods are integrated using hybrid models and differentiable reasoning techniques. Applications show enhanced diagnostic precision and decision-making skills in a variety of industries, including robotics, healthcare, and finance. To promote responsible AI development, regulatory frameworks and ethical principles address issues like bias and transparency. Future paths …

The Influence Of The Digital Economy On The Ecological Environment And Its Sustainable Development, Xinpan Lyu, Jianhua Dai

ASEAN Journal on Science and Technology for Development

This study aims to examine the impact of the digital economy on ecological sustainability and its development in China from 2000 to 2022. The study focuses on the role of innovation in the digital sector, where the adoption of big data technologies is considered, with reference to sustainable development, from an environmental perspective. A dynamic threshold model and, in particular, the Iterated Generalized Least Squares (IGLS) technique is used to analyze the given data.The research reveals a significant link between adopting digital technologies and managing environmental sustainability efficiently. To investigate the interconnection between the digital economy and ecological goals, it …

A First Model Foundation Design Of Wood Pillar In Banjarmasin Swampland, Nursyarif Agusniansyah, Gusti Novi Sarbini, Akbar Rahman, Muhammad Tharziansyah

ASEAN Journal on Science and Technology for Development

Banjarmasin's swampland presents distinct characteristics that make it suitable for constructing homes, but it also requires special attention, especially concerning the foundation. The soil in this area often has extremely low carrying capacity, which poses a significant challenge for construction. Mistakes in choosing construction materials, coupled with mismatched building loads and inadequate foundation functions, often result in foundation failures—a common cause of building collapses. As the complexity and functionality of buildings increase, the need for more thoughtful house design becomes more crucial. The commonly used wooden pile foundation, while popular, has limited load-bearing capacity, necessitating modifications to enhance its strength. …

Analysis Of The Sustainability Management Of Coral Reef Ecosystem In The Marine Protected Area Of Wediombo, Gunungkidul, Nabilah L. Rohmah, Rika Harini, Sudrajat Sudrajat

ASEAN Journal on Science and Technology for Development

The Wediombo Coastal Area is a Marine Protected Area (MPA) with highly potential in coral reef ecosystems. According to the Millennium Ecosystem Assessment (MEA), coral reefs play a vital role in supporting human life by providing provisioning, supporting, regulating, and cultural services. However, the utilization of this area as a tourist destination and suboptimal management practices have led to the degradation of its coral reef ecosystems. Efective management strategies for the sustainability of coral reefs can have positive impacts across ecological, economic, social, technological, and institutional dimensions. Therefore, this study aims to analyze the sustainability management of coral reef ecosystem …

Potential Of Green Synthesis Of Silver And Gold Nanoparticles For The Management Of Metabolic Associated Steatotic Liver Disease: A Mini Review, Atiqah Suhaili, Ya Chee Lim, Mei Ann Lim, Lee Hoon Lim, Mohammad Mansoob Khan, Monowarul Mobin Siddique

ASEAN Journal on Science and Technology for Development

Metabolic-associated steatotic liver disease is a metabolic disorder with limited pharmacological treatment options and only one approved medication to date. MASLD can be asymptomatic in its earlier stage and hence, prevention of this disease progression is the most effective approach. Recently, green-synthesized nanoparticles, particularly silver (AgNPs) and gold nanoparticles (AuNPs), have gained interest due to their eco-friendly production, biocompatibility, and bioactive properties. This review highlights the biosynthesis of AgNPs and AuNPs using medicinal plant extracts and their reported biological effects relevant to MASLD management including anti-hyperlipidemic, anti-diabetic, antioxidant and anti-inflammatory activities. While findings are promising, further mechanistic studies and preclinical …

Improving Ethanol Purity By Methanol Adsorption Using Mcm-41: A Study Of Kinetics And Thermodynamics For Industrial Applications, Ali A. Yahya, Nisreen S. Ali, Basma B. Hameed, Talib M. Albayati, Issam K. Salih, Riyadh S. Almukhtar, Narges Elmi Fard

ASEAN Journal on Science and Technology for Development

One of the by-products of the fermentation process that produces ethanol, which is mostly utilized in industry and food, is methanol. For methanol adsorption in batch operations, mixed amines modified (MCM-41) was utilized. A batch adsorption technique loaded with MCM-41 sorbent was used in the study to separate methanol from ethanol. This study used methanol at varying initial concentrations (40-80 mg/L). As a result, the effect of temperature, duration of adsorption, amount of adsorbent and initial concentration of pollutant in the field of ethanol alcohol purification using MCM-41 was investigated through the adsorption mechanism. In addition, first and pseudo-second order …

Kadysnet: A Novel Approach To Dyslexia Prediction In Children: Combining Handwritten Text Recognition With A Hybrid Cnn-Bilstm-Ctc Model And Personalized Learning Strategies, Shailesh Prabhakar Patil, Ravindra Sadashivrao Apare, Ravindra Honaji Borhade, Parikshit Narendra Mahalle

ASEAN Journal on Science and Technology for Development

This study introduces a novel approach for early dyslexia detection in children through automated handwriting analysis, integrating a hybrid CNN-BiLSTM-CTC architecture with personalized learning strategies. Our method combines a custom CNN-BiLSTM-CTC model with tailored educational interventions to support dyslexic learners. We analyzed children's handwritten text images in English, collected from specially designed tests involving word rewriting, sentence reconstruction, and paragraph composition, particularly challenging tasks for dyslexic individuals. Notably, our CNN-BiLSTM-CTC model achieved the best result with an accuracy of 97.67%, outperforming other architectures. Compared to pre-trained models like EfficientNetB7, DenseNet121, and MobileNetV2, our custom CNN-BiLSTM-CTC model demonstrated superior performance. Key …

Analysis Of Sea Level Rise In The Subduction Zone At The Coastal Area Of Selaru Island And Yamdena Island In Tanimbar Islands District, Ibnu A. Azies, Engki A. Kisnarti, Johar Setiyadi, Widodo S. Pranowo

ASEAN Journal on Science and Technology for Development

The phenomenon of sea level rise (SLR) is a global issue affecting coastal areas. This study analyzes SLR and land deformation in the subduction zone of the Tanimbar Islands, specifically the coastal regions of Adaut on Selaru Island and Saumlaki on Yamdena Island. Statistical methods and the CEEMDAN algorithm were used to process data on tides, Sea Level Anomaly (SLA), Sea Surface Temperature (SST), and the influence of the El Niño-Southern Oscillation (ENSO) over 30 years (1993–2022). Additionally, land deformation was analyzed using Sentinel-1A imagery. The results indicate that uplift is more dominant than subsidence, with an average annual uplift …

Research On Data Organization Methods And Key Technologies For Product-Oriented Smart Steel Bar Processing Systems, Peijun Zhang, Lianxia Ma, Chunlei Zhang, Xinwu Zan

ASEAN Journal on Science and Technology for Development

This paper addresses the issues in the data organization logic of existing intelligent steel bar processing systems, which are centered on construction projects. It investigates product-oriented data organization methods and the key technologies of logical correspondence between steel bar product identification codes and physical entities. The paper analyzes the product-oriented data organization logic and presents the corresponding data organization architecture. It also examines the feature extraction of steel bar product information classification and coding, as well as the dynamic completeness of the coding rule system. The paper provides a construction method for steel bar product identification codes and designs partial …

Leveraging Strategic Information Systems For Competitive Advantage: A Case Study Of Veolia As A Multinational Enterprise, Sohail Nawaz Sabir

ASEAN Journal on Science and Technology for Development

Instead of examining several components that link planning and strategy implementation, researchers have focused on the alignment of IT and business, as well as the Strategic Information Systems Planning (SISP) process. The goal of this study is to examine several approaches that can close the gap between IT project planning and execution. Therefore, the primary objective of the proposed study is to examine SISP implementation strategies that can be theorized in the context of Veolia, a global multinational corporation (MNC). The primary aspects influencing the SISP for this study are the frequency of planning, the function of IT/business managers, assessment …

Numerical And Experimental Investigation Of Mechanical Performance, Interface Pressure Distribution, And Structural Safety Of Glass Fiber-Reinforced Below-Knee Prosthetic Sockets, Saif M. Abbas, Kadhim K. Resan, Mohammed Ali Abdulrehman, Ali M. Flayyih

ASEAN Journal on Science and Technology for Development

In this study, below-knee prosthetic sockets reinforced with glass-fiber composites were investigated experimentally and numerically. In compliance with the ASTM guidelines, two lay-up configurations were constructed and tested for tensile and fatigue strengths. During the gait trials, the F-socket system was used to measure the interface pressure distribution. Stress, deformation, and safety factor responses under physiological loading conditions were simulated using complementary finite element analysis (FEA). With the yield strength, ultimate tensile strength, and fatigue life significantly improved in the reinforced group, the results demonstrated that the 10-layer laminate displayed superior mechanical performance relative to the 8-layer laminate; however, this …

Editorial: A Decade Of Apasti – Advancing Regional Prosperity Through Science, Technology And Innovation, Basilios Tsikouras

ASEAN Journal on Science and Technology for Development

A decade after its establishment, APASTI has emerged as a key regional mechanism for promoting science, technology and innovation as drivers of sustainable development, resilience, and shared prosperity in Southeast Asia. This editorial highlights the contributions of APASTI to policy alignment, knowledge exchange, research visibility, and collaborative network-building across ASEAN, while also acknowledging ongoing constraints related to governance, capacity, funding disparities, and uneven regional integration. It introduces a special issue of 14 papers published in AJSTD that collectively evaluate the implementation and impact of APASTI across diverse sectors, including geohazards, energy, materials, health, infrastructure, transport, and information systems. By positioning …

The Effect Of Blanching And Steaming Pretreatment On The Quality Of Durian (Durio Zibenthinus Murr.) Seed Flour, Nabilah Daniel, Rosnah Shamsudin, Mohd Sabri Pak Dek, Jhauharotul Muchlisyiyah, Masmunira Rambli

ASEAN Journal on Science and Technology for Development

Durian (Durio zibethinus Murr.), the "King of Fruits," has seeds that offer nutritional benefits, including high fiber for gut health and high protein for muscle growth. However, natural browning enzymes can limit its use in baking. This study investigates the comparative effects of blanching and steaming durations (5, 10, 15, 20, and 25 minutes) on the color and techno-functional properties of durian seed flour (DSF), providing an optimization-based approach rarely reported for this material.. Durian seeds were sourced from various stalls in Malaysia, washed, soaked in 0.6% sodium metabisulfite, and then blanched or steamed for for varying durations as …

Seismic Vulnerability Assessment With Rapid Visual Screening Of Hospital Buildings In Maguindanao Province, Philippines, Ebrahim B. Kayog, Kristine S. Companion, Kenny B. Cantila, Elizabeth Edan M. Albiento

ASEAN Journal on Science and Technology for Development

Hospitals are expected to maintain operations during and after earthquakes, yet many facilities in the Philippines remain structurally and non-structurally vulnerable. This study evaluates the seismic vulnerability of selected public hospitals in Maguindanao Province, located near the Cotabato Trench and the Western Mindanao Fault, using the FEMA P-154 (3rd ed.) Rapid Visual Screening (RVS) Level-1 procedure. Four government hospitals, comprising 53 buildings constructed between 1980 and 2025, were assessed through a systematic visual inspection and review of available secondary records. Basic structural hazard scores were adjusted using FEMA score modifiers (performance modification factors) to compute Final Level-1 scores (Sₗ₁) and …